Cylinder and adsorption separation device using the cylinder

An adsorption separation device is used with a cylinder, wherein the cylinder comprises a cylinder body, a first piston, and a second piston. The first piston and the second piston are arranged inside the cylinder body, and the first piston and the second piston are be spaced from each other. The cylinder further comprises a first shaft and a second shaft where the first shaft extends into the cylinder body and is connected with the first piston, and the second shaft is slidably sleeved in the first shaft and connected with the second piston. The adsorption separation device includes the cylinder. The cylinder and the adsorption separation device are actually two or more cylinders sharing the same cylinder body and controlling two or more pistons and shafts respectively. The control directions and strokes of the pistons are independent relative to each other and do not affect each other.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a U.S. National Phase Application under 35 U.S.C. § 371 of International Patent Application No. PCT/CN2014/093151, filed Dec. 5, 2014 and claims priority from Chinese Application No. 201420176308.7, filed Apr. 11, 2014, which are incorporated herein by reference in their entireties. The International Application was published in Chinese on Oct. 15, 2015 as International Publication No. WO 2015/154494 A1.

FIELD OF THE INVENTION

The present invention relates to the technical field of cylinders, and more particularly to a cylinder and an adsorption separation device using the cylinder.

BACKGROUND OF THE INVENTION

In existing cylinders, each cylinder can usually control only one shaft. When two or more shafts need to be controlled, two or more cylinders need to be used. Thus, large assembly space and much cost are required.

SUMMARY OF THE INVENTION

An objective of the present invention is to overcome the drawbacks of the above-described prior art. A cylinder and an adsorption separation device using the cylinder, which need smaller assembly space and less cost, are provided.

The present invention is realized by the following solution: a cylinder comprises a cylinder body, a first piston, and a second piston; the first piston and the second piston are arranged inside the cylinder body, and the first piston and the second piston are arranged to be spaced from each other; the cylinder further comprises a first shaft and a second shaft, the first shaft extends into the cylinder body and is connected with the first piston, and the second shaft is slidably sleeved in the first shaft and connected with the second piston.

Preferably, the first piston and the second piston separate the cylinder body into three independent chambers, and a sidewall of the cylinder body is provided with vent holes communicating with the three independent chambers respectively.

Preferably, a seal ring is arranged between the first shaft and the second shaft.

Preferably, each of an end of the first shaft extending out of the cylinder body and an end of the second shaft extending out of the cylinder body is provided with a screw connection portion.

Preferably, each of an outside of the first piston and an outside of the second piston is sheathed in a piston ring.

Preferably, the cylinder body is provided therein with a third piston, the third piston is connected with a third shaft, and the third shaft is slidably sleeved in the second shaft.

Preferably, each of the vent holes is communicated with a vent pipe joint.

The present invention further provides an adsorption separation device, wherein the adsorption separation device includes the above-described cylinder.

Preferably, the adsorption separation device comprises an air inlet assembly, an air outlet assembly, and an adsorption separation assembly, the air inlet assembly and the air outlet assembly are respectively connected to two ends of the adsorption separation assembly; the air inlet assembly is provided with an air inlet configured for gas intake and an air vent configured for gas exhaust, and the cylinder is connected with an air inlet pressing plate configured to control the air inlet and an exhaust pressing plate configured to control the air vent.

Preferably, the air vent is communicated with an exhaust valve.

In the cylinder and the adsorption separation device using the cylinder provided by the embodiments of the present invention, there are actually two or more cylinders sharing the same cylinder body and controlling two or more pistons and shafts respectively, the control directions and strokes are independent relative to each other and do not affect each other. Moreover, the assembly space can be smaller, and the cost can be less.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

In order to make the purposes, technical solutions, and advantages of the present invention be clearer, the present invention will be further described in detail hereafter with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only intended to illustrate but not to limit the present invention.

It needs to be noted that when an element is described as “fixed to” or “arranged at” another element, it may be in direct contact with the another element, while between the two elements there may also be an intermediate element; and when an element is described as “connected to” another element, it may be connected to the other element directly, while between the two elements there may also be an intermediate element.

It needs to be further noted that the position terms used in the embodiments, such as “left”, “right”, “upper”, “lower”, and so on, are only relative concepts corresponding to each other or take normal using statuses of products as references, and should not be considered as having limitations.

As shown inFIGS. 1-6, a cylinder provided by one embodiment of the present invention comprises a cylinder body1, a first piston2, and a second piston3; the first piston2and the second piston3are arranged inside the cylinder body1, and the first piston2and the second piston3are arranged to be spaced from each other; the cylinder1further comprises a first shaft4and a second shaft5, the first shaft4extends into the cylinder body1and is connected with the first piston2, and the second shaft5is slidably sleeved in the first shaft4and connected with the second piston. By such design, the first piston2and the second piston3control the first shaft4and the second shaft5respectively, so that the same cylinder body1can realize different controls by means of two or more pistons and shafts, and the assembly space can be smaller and the cost can be less.

In particular, as shown inFIGS. 1-6, the first piston2and the second piston3separate the cylinder body1into three independent chambers11a,11b, and11c. A sidewall of the cylinder body1is provided with three vent holes12a,12b, and12c, which are communicated with the three independent chambers11a,11b, and11crespectively, so that the pistons can be controlled respectively and the shafts can be controlled to move.

In particular, as shown inFIGS. 1-6, a seal ring6is arranged between the first shaft4and the second shaft5to prevent air leakage.

In particular, as shown inFIGS. 1-6, ends of the first shaft4and the second shaft5extending out of the cylinder body1are provided with screw connection portions4aand5arespectively, so that the first shaft4and/or the second shaft5can be easily connected to external elements to work.

In particular, as shown inFIGS. 1-6, the outsides of the first piston2and the second piston3are sheathed in piston rings2aand3arespectively, so that the independent chambers11a,11b, and11cin the cylinder body1can be sealed effectively.

In particular, the cylinder body1is further provided therein with a third piston (not shown), the third piston is connected with a third shaft (not shown), and the third shaft is slidably sleeved in the second shaft5. In this way, a plurality of pistons and shafts can be controlled by the same cylinder body1, and thus the assembly space can be saved. In specific applications, a fourth piston and a fourth shaft, a fifth piston and a fifth shaft, and even more pistons and shafts may be added, the specific numbers of the pistons and the shafts can be determined according to actual requirements, and these variations are all included in the protection scope of the present invention.

In particular, as shown inFIGS. 1-6, each of the vent holes12a,12b, and12cis communicated with a vent pipe joint13, so that gas can be input into the cylinder body1via a pipe.

The cylinder provided by the above-described embodiment of the present invention can greatly reduce the assembly space and volume of the cylinder, and thus can solve many problems occurring in the case that a plurality of cylinders may need to be mounted in small assembly space to realize control. In the cylinder provided by the embodiment of the present invention, there are actually two or more cylinders sharing the same cylinder body and realizing different controls via the pistons, the inner shaft(s) also serving as piston rods (e.g., the first shaft4), and the outer shaft(s) (e.g., the second shaft5), the control directions and strokes are independent relative to each other and do not affect each other.

As shown inFIGS. 1-9, one embodiment of the present invention provides an adsorption separation device, wherein the adsorption separation device includes the above-described cylinder.

In particular, as shown inFIGS. 1-9, the adsorption separation device comprises an air inlet assembly71, an air outlet assembly72, and an adsorption separation assembly73, the air inlet assembly71and the air outlet assembly72are respectively connected to two ends of the adsorption separation assembly73; the air inlet assembly71is provided with an air inlet711configured to allow gas to enter and an air vent712configured to allow gas to exhaust, and the cylinder is connected with an air inlet pressing plate74configured to control the air inlet711and an exhaust pressing plate75configured to control the air vent712. The air inlet assembly71can include an inlet valve seat77, and the cylinder can be connected to the inlet valve seat77. The air inlet pressing plate74can be fixed by one or two nuts threadedly connected with the screw connection portion4aof the first shaft4, and the exhaust pressing plate75can be fixed by one or two nuts threadedly connected with the screw connection portion5aof the second shaft5. In this way, by gas intake and gas exhaust through the three vent holes12a,12b, and12cof the cylinder body1, actions of the air inlet pressing plate74and the exhaust pressing plate75can be controlled, and thus gas intake and gas exhaust of the adsorption separation device can be realized.

In particular, the air vent712is communicated with an exhaust valve76. In the adsorption separation device provided by the embodiment of the present invention, the air inlet711and the air vent712can be respectively controlled by a driving assembly including integrated multiple elements, so that an exhaust cylinder with a silencer configured to maintain a uniform pressure can be removed, and the operation can be more stable and reliable. Since the cylinder is an integrated structure, the number of control cylinders and the assembly space can be greatly reduced.

In the cylinder and the adsorption separation device using the cylinder provided by the embodiments of the present invention, there are actually two or more cylinders sharing the same cylinder body1and controlling two or more pistons (e.g.,2and3) and shafts (e.g.,4and5) respectively, the control directions and strokes are independent relative to each other and do not affect each other. Moreover, the assembly space can be smaller, and the cost can be less.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.