Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a lubrication distributor monitoring system capable of monitoring a plurality of distributor bodies (1) simultaneously. The lubrication distributor monitoring system comprises a monitoring system (9) and several distributor bodies (1), wherein a second piston hole (31) is provided in each distributor body (1), a working piston (3) is slidably arranged in the second piston hole (31), each distributor body (1) further comprises a sensing apparatus (7) for sensing slippage of the working piston (3), and a transmission module (8) connected to the sensing apparatus (7), and a sensing signal of the sensing apparatus (7) is sent to the monitoring system (9) by means of the transmission module (8). By means of the arrangement of the sensing apparatuses (7) and the transmission modules (8), staff can observe working conditions of the distributor bodies (1) in real time without being on the scene, such that the workload of staff is reduced, and intelligent monitoring is achieved.
A: An intelligent automatic feeding mechanism. The feeding mechanism comprises a feeding frame (6), a driving linkage (8) and a driven linkage (9) fixedly connected to the left and right sides of the feeding frame (6), a hydraulic rod (23) in drive connection with the driving linkage (8), and two hooking tooth mechanisms (1) fixedly provided at the front side of the feeding frame (6). The feeding mechanism further comprises: a first sensing device (2) used for outputting a first sensing signal under the effect of a side face of a waste container (24); a second sensing device (3) used for outputting a second sensing signal under the effect of a container edge of the waste container (24); two gravity sensing plates (7) used for detecting and outputting a pressure signal applied by the waste container (24); a waste container feeding limiting device used for limiting the ascending limit position of the waste container (24); and a control system connected to the first sensing device (2), the second sensing device (3), the two gravity sensing plates (7) and the waste container feeding limiting device by means of circuits respectively. Also disclosed is a control method for a feeding mechanism. The mechanism reduces the labor intensity of an operator, improves the operation efficiency, achieves the automation of a feeding cycle process, reduces the risk of container drop, and prolongs the service life of waste containers.
B: A liquid distributing valve comprises a shell (1) and an oil supply channel (2). The shell (1) comprises an oil storage valve and a two-position three-way valve; the oil storage valve is separated into an oil storage chamber (31) and an oil pressing chamber (32) by a piston (4); the oil storage chamber (31) is communicated with an oil draining port (61) and is provided with a spring (5) butting against the piston (4); the two-position three-way valve comprises a valve chamber (7), a valve core (8) and a valve base (9); the valve chamber (7) is communicated with the oil pressing chamber (32) through an oil exchanging channel (10); an oil inlet (62) of the valve chamber (7) is communicated with the oil supply channel (2); a core hole (91) of the valve base (9) is communicated with the oil storage chamber (31) through a bypass oil channel (11). When the valve core (8) is located at a first valve position, the oil inlet (62) is plugged and the oil pressing chamber (32) is communicated with the oil storage chamber (31); when the valve core (8) is located at a second valve position, the core hole (91) is plugged and lubricating oil enters the oil pressing chamber (32) from the oil inlet (62), the piston is pushed to compress the spring, and the lubricating oil in the oil storage chamber (31) is drained from the oil draining port (61) and is conveyed to an appointed lubricating point. The liquid distributing valve is applicable to various lubricating demands, has a compact structure and high reliability and is convenient in maintenance.
C: A soluble bridge plug adapter, comprising an adapter body (1) and a temperature acquisition and recording device (3). The temperature acquisition and recording device (3) is fixed on the adapter body (1), the adapter body (1) is used for connecting a setting tool and a soluble bridge plug, and the temperature acquisition and recording device (3) is used for measuring and recording the ambient temperature of the adapter body (1). Also provided are a dynamic well temperature measurement method using the soluble bridge plug adapter and a soluble bridge plug producing method. According to the soluble bridge plug adapter, the dynamic well temperature measurement method, and the soluble bridge plug producing method, the dynamic downhole ambient temperature can be measured when the soluble bridge plug is pumped, the operation is convenient, the cost is low, and a basis is provided for the material selection and design of ideal soluble bridge plugs used in this sector, thus facilitating the design of ideal soluble bridge plugs for use in the sector.
D: An air tightness testing device for a wheel hub, the air tightness testing device comprising a testing machine (1), a telescopic arm (2), a water tank (3), an electric motor (4), a wheel hub (5) and a clamp (6), wherein a weight sensing device (7) is arranged at the bottom of the water tank (3), and the weight sensing device (7) is used for measuring the volume of water in the water tank (3); a first alarm device (8) is arranged on an outer surface of the water tank (3), and the first alarm device (8) is connected to the weight sensing device (7); liquid sensing devices (9) are arranged on the clamp (6), and the liquid sensing devices (9) are used for detecting whether the clamp (6) comes into contact with the water; and a second alarm device (10) is arranged on the testing machine (1), and the second alarm device (10) is connected to the liquid sensing device (9). The weight sensing device (7) is arranged below the water tank (3) and connected to the first alarm device (8), and the liquid sensing devices (9) are arranged on the upper and lower end faces of the clamp (6) to detect whether the wheel hub (5) is completely submerged in water, such that the device has a simple overall structure, the working efficiency of testing the air tightness of the wheel hub (5) is improved, and incomplete immersion of the wheel hub (5) due to insufficient water in the water tank (3) is avoided.
Answer: B