Patent Publication Number: US-11384750-B2

Title: Hose pump rotor

Description:
This application is a National Stage of PCT/CN2018/078851, filed Mar. 13, 2018, which claims priority to CN 201710146816.9, filed Mar. 13, 2017 which are incorporated herein by reference in their entirety. 
     TECHNICAL FIELD 
     The present invention relates to a hose pump, and more particularly to an improved structure of a hose pump rotor. 
     BACKGROUND ART 
     Hose pumps in the prior art are widely used in the chemical industry and other industrials, and the basic structure thereof comprises a housing and a hose placed inside the housing, wherein a rotor support, which is driven to rotate by a main shaft, drives rollers to squeeze the hose to pump a medium. During the working process, there are special requirements for the extent to which the hose is rolled by the rollers, that is, the amount of deformation of the hose, which is closely related to the pumping flow rate and the material of the hose. This requires the rollers to be displaceable in a radial direction for adjustment, to ensure the extent to which the hose is squeezed. In addition, in the early, middle and late stages of use, since the elasticity of the hose varies, whether the position of the roller can be adjusted in the radial direction to obtain the appropriateness for the roller rolling the hose is an urgent technical problem to be solved in the industry. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a hose pump rotor, which facilitates the adjustment of the positions of rollers in a radial direction such that a hose is squeezed to a moderate extent. 
     In order to achieve the above object, the following technical solution is used in the present invention: a hose pump rotor, wherein a main rotating shaft comprises a main shaft and a rotor base which are fixedly connected to each other, roller support arms are symmetrically arranged on the rotor base and outer ends thereof are connected to rollers, with axes of the rollers being parallel to an axis of the main shaft, the roller support arms and the rotor base form a radially-displaceable limiting fit, and the roller support arms are fixedly connected to the rotor base via locking components. 
     With the above technical solution, the roller support arms can be displaced in the radial direction on the rotor base and can be fixed by locking same via the locking components, so that the positions of the roller support arms can be adjusted when needed. That is to say, the positions where the rollers are fitted to the hose are adjusted, so that the force exerted by the rollers on the hose can be ensured, and normal operation of the hose can be guaranteed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of the present invention; 
         FIG. 2  is a right view of  FIG. 1 ; 
         FIG. 3  is a perspective view of the present invention; 
         FIG. 4  is a perspective view of a main shaft and a rotor base of the present invention, respectively; 
         FIG. 5  is a perspective view of a roller support arm of the present invention, respectively. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     In a hose pump rotor shown in  FIGS. 1-5 , a main rotating shaft comprises a main shaft  10  and a rotor base  20  which are fixedly connected to each other, roller support arms  40  are symmetrically arranged on the rotor base  20  and outer ends thereof are connected to rollers  30 , with axes of the rollers  30  being parallel to an axis of the main shaft  10 , the roller support arms  40  and the rotor base  20  form a radially-displaceable limiting fit, and the roller support arms  40  are fixedly connected to the rotor base  20  via locking components. In the above solution, the so-called radially-displaceable limiting fit means that the roller support arms  40  and the rotor base  20  can move relative to each other in a radial direction and can only move in the determined radial direction. 
     The main shaft  10  and the rotor base  20  can be independently machined in the form of split structures and then fixedly connected in one piece, an electric motor drives the main shaft  10  to rotate, and the rotor base  20  rotates synchronously along with the main shaft and drives the roller support arms  40  and the rollers  30  connected thereto to rotate. When rotating, the rollers  30  intermittently come into contact with and roll the hose to realize a task of pumping a medium. Since the roller support arms  40  and the rotor base  20  form the radially-displaceable limiting fit, the roller  30  can be adjusted to implement displacement adjustment in the radial direction of the rotor as needed to ensure the force by which the rollers  30  roll the hose, and thereby the pumping efficiency of the hose under normal operating conditions, which can increase the service life of the hose. 
     As a preferred solution, the rotor base  20  is in the form of a groove enclosed by a bottom plate  21  and side plates  22  disposed on opposite sides thereof, wherein the bottom plate  21  is fixedly connected to the main shaft  10 , and a groove length direction of a groove cavity on the rotor base  20  is consistent with the radial direction of the main shaft  10 . In this solution, the groove structure is preferably used as a guide constraint of the limiting fit, which is not only simple in structure, but also facilitates assembly operation. 
     Inner segments of the roller support arms  40  are located inside the groove cavity of the rotor base  20 , and the roller support arms and the rotor base form a radially-movable fit. Connection bolts  50  are disposed between the roller support arms  40  and the bottom plate  21  and/or the side plates  22  of the rotor base  20  to form locking components; and the outer ends of the roller support arms  40  are located outside outer ends of the groove cavity of the rotor base  20 . After the roller support arms  40  are adjusted in place, they are locked and fixedly connected by the connection bolts  50 , ensuring the stable positions of the rollers  30 . 
     As a specific preferred solution, the roller support arms  40  are in the shape of a strip plate, inside plate surfaces of the roller support arms  40  are attached to an in-cavity plate surface of the bottom plate  21 , and two side plate surfaces of the roller support arms  40  are attached to in-cavity plate surfaces of the side plates  22  of the rotor base  20 ; strip-shaped holes  41  are formed in the plate surfaces of the roller support arms  40 , the length direction of the strip-shaped holes  41  being consistent with the radial direction; and connection holes  211  are formed in the plate surface of the bottom plate  21 , and the strip-shaped holes  41  positionally correspond to the connection holes  211  and allow the connection bolts  50  to implement connection. 
     In the above solution, the roller support arms  40  are configured to be in an attachment fit with both the groove bottom and groove walls of the rotor base  20 , that is, a three-surface-contact-type limiting fit between the roller support arms and the rotor base, leaving a movement adjustment in the radial direction to ensure the dynamic balance of the rotor. 
     As a preferred solution, the two roller support arms  40  are symmetrically arranged with the main shaft  10  as the center, outside plate surfaces of the roller support arms  40  are provided with bumps  42 , and adjustment lead screws  60  are disposed between the bumps  42  of the two roller support arms  40 . The above solution is based on the fact that limiting grooves of the roller support arms  40  are straight grooves, which facilitates both machining and adjustment, in particular, the provision of the bumps  42  for arranging the lead screws  60  allows the lead screws  60  and heads of the bolts  50  to be in clearance positions and enables continuously variable adjustment of the spacing between the roller support arms  40 , to obtain the optimum force by which the rollers  30  roll the hose. 
     As a preferred solution, three strip-shaped holes  41  are arranged apart from one another on the plate surface of each roller support arm  40 , and the connection holes  211  are disposed corresponding to the strip-shaped holes  41 . 
     Two bumps  42  are arranged apart from each other on the roller support arm  40  in a plate width direction, and one adjustment lead screw  60  is disposed between the bumps  42  of the roller support arms  40  on the same side. This can ensure that the two roller support arms  40  synchronously move close to or away from each other in the radial direction with respect to the axis of the rotor, which ensures that the forces by which both of the rollers  30  roll the hose are the same, i.e., ensuring the stability of the flow rate of the medium pumped, avoiding fluctuation of the rolling force applied to the hose, and then ensuring that the amount of deformation of the hose is stable and controllable. 
     In order to facilitate the assembly and adjustment, edges, at a groove opening, of the side plates  22  of the rotor base  20  are provided with rulers  221 ; the bumps  42  are provided with marking scales  421 , and the marking scales  421  on the bumps  42  may also be formed by bump surfaces themselves; and the rulers  221  are arranged adjacent and corresponding to the marking scales  421 . The corresponding arrangement of the above-mentioned rulers  221  and marking scales  421  can provide convenience when a hose pump is being assembled, that is, the hose is first arranged inside the pump housing and is fixed with a hose end thereof. At this time, since there is no squeezing from the rollers  30 , the hose can be installed easily and conveniently. Whether the rotor is installed in advance or later, the roller support arms  40  are first adjusted to the approximate positions, that is, the rollers  30  are adjusted to the initial installation positions, and the rollers  30  at the installation initial positions have no interference or substantially no interference with the hose. After completing the installation of the hose, the positions of the roller support arms  40  on the rotor base  20  are adjusted, and whether the rollers  30  have reached the design positions can be easily determined by observing the corresponding positions of the rulers  221  and the marking scales  421 .