Pantograph pressure switch testing device

Abstract

The utility model relates to a pantograph pressure switch testing device in the technical field of pantograph production, which comprises a testing machine device capable of adjusting testing air pressure, a testing table for fixing a pantograph pressure switch, and an air cylinder, the outer end of the cylinder telescopic shaft is provided with a connector which can be hermetically communicated with a pantograph pressure switch gas circuit joint; the connector comprises a sleeve with a conical inner cavity and a connecting pipe, the sleeve is arranged at the outer end of the telescopic shaft of the air cylinder, and the central axis of the sleeve is parallel to the central axis of the telescopic shaft of the air cylinder; according to the utility model, the cylinder drives the sleeve to move, and the sleeve drives the connecting pipe to move, coaxially sleeves the pantograph pressure switch gas circuit joint, and is in sealed communication with the pantograph pressure switch gas circuit joint; similarly, only the air cylinder needs to be shrunk during disassembly. Compared with the prior art that the threaded sleeve is rotated circle by circle, the dismounting and mounting speed is higher, and the efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of pantograph production, in particular to a pantograph pressure switch testing device. Background Art

[0002] The pantograph is an electrical device installed on the roof of a locomotive or EMU, which is used by electric traction locomotives to obtain electricity from the overhead line. The pantograph raising and lowering operations are usually done manually. To improve safety, the pantograph is usually equipped with a pressure switch. When the pantograph fails, the pressure switch can also automatically control the pantograph to be lowered, reducing the response time and increasing the fault tolerance rate.

[0003] A Chinese patent (publication number: CN113442730B) discloses a pantograph pneumatic control system that can automatically lower the pantograph; the patent explains that when the pantograph fails and the air pressure drops to the pressure switch activation threshold, the pressure switch in the detection air circuit is energized, allowing the pantograph lowering air circuit to be ventilated to start lowering the pantograph.

[0004] However, before the pantograph leaves the factory, it is necessary to detect whether the start-up of the pressure switch in the gas circuit is normal (that is, whether the pressure switch will start when the pressure is less than the start-up threshold (the start-up threshold needs to be between AkPa and BkPa)).

[0005] The existing publication number is CN210323279U, which is an automatic function tester for a pneumatic switch. The device is threadedly connected to the second connecting pipe through a threaded sleeve, so that the pipe openings of the first connecting pipe and the second connecting pipe are connected to each other. Although this connection method can ensure the airtightness and firmness between the first connecting pipe and the second connecting pipe, and ensure the accuracy of the detection result of the pneumatic switch, this disassembly and assembly method requires rotating the threaded sleeve in circles, and each time the threaded sleeve is rotated one circle, the threaded sleeve only moves one pitch. This disassembly and assembly method is slow, inefficient, very time-consuming and laborious.

[0006] Therefore, we designed a pantograph pressure switch testing device. Utility Model Content

[0007] In order to overcome the deficiencies in the background technology, the utility model discloses a pantograph pressure switch testing device.

[0008] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0009] A pantograph pressure switch testing device, comprising a testing machine capable of adjusting the test air pressure, and also comprising a test bench and a cylinder for fixing the pantograph pressure switch, wherein the outer end of the telescopic shaft of the cylinder is provided with a connector capable of sealingly communicating with the pantograph pressure switch air path joint;

[0010] The connector includes a sleeve with a tapered inner cavity and a connecting pipe. The sleeve is arranged at the outer end of the cylinder telescopic shaft, and the central axis of the sleeve is parallel to the central axis of the cylinder telescopic shaft; the connecting pipe includes a tapered flexible section, and the tapered flexible section is matched and inserted in the inner cavity of the sleeve. The large head end of the tapered flexible section is provided with a shift ring, and the shift ring is in contact with the corresponding end face of the sleeve. The small head end of the tapered flexible section is provided with a rigid connection section extending out of the inner cavity of the sleeve, and the rigid connection section is connected to the testing machine device through the air pipe, and a locking nut is screwed on the outer periphery of the rigid connection section.

[0011] Preferably, the top surface of the test bench is provided with a placement groove for placing the pantograph pressure switch.

[0012] Preferably, the placement slot is tilted up and down so that the pantograph pressure switch air path connector located in the placement slot is tilted upward;

[0013] The cylinder is tilted up and down so that the central axis of the cylinder telescopic shaft is parallel to the central axis of the pantograph pressure switch air path joint located in the placement groove.

[0014] Preferably, the testing machine device includes a fixed box, the fixed box has two upper and lower chambers, the lower chamber of the fixed box is provided with an air source device, the upper chamber of the fixed box is provided with a testing machine capable of adjusting the test air pressure, the testing machine is correspondingly connected to the air source device, and the testing machine is correspondingly connected to the rigid connection section through an air pipe.

[0015] Preferably, the testing machine has a control valve, a pressure regulating valve and an air pressure detection module, the air inlet end of the control valve is correspondingly connected to the air outlet end of the air source device, the air outlet end of the control valve is correspondingly connected to the air inlet end of the pressure regulating valve, the air outlet end of the pressure regulating valve is correspondingly connected to the rigid connection section, and an air pressure detection module is provided between the pressure regulating valve and the rigid connection section.

[0016] Preferably, the testing machine has a display screen, and the display screen is connected to the air pressure detection module signal to display the regulated air pressure.

[0017] Preferably, the testing machine also has a display light that can be connected to the signal of the pantograph pressure switch to be tested, so as to detect the state of the pantograph pressure switch to be tested.

[0018] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0019] 1. The sleeve can be driven to move by the cylinder, and the sleeve drives the connecting pipe to move, and is coaxially sleeved on the pantograph pressure switch gas circuit joint, and is sealed and connected with the pantograph pressure switch gas circuit joint; similarly, when disassembling, only the cylinder needs to be retracted. Compared with the prior art of rotating the threaded sleeve in circles, the disassembly and assembly speed is faster and more efficient;

[0020] 2. The setting of the connector can ensure that the conical flexible section is sealed and connected with the gas path joint of the pantograph pressure switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the connector in the utility model;

[0023] Figure 3 It is a cross-sectional view of the connector in the utility model;

[0024] Figure 4 This is a schematic diagram of the assembly of the connector and the pantograph pressure switch gas circuit joint in the utility model;

[0025] Figure 5 This is the detection principle diagram of the utility model.

[0026] In the figure: 1. test machine device; 11. fixed box; 12. air source device; 13. test machine; 131. control valve; 132. pressure regulating valve; 133. air pressure detection module; 134. display screen; 135. display light; 2. test bench; 21. placement slot; 3. cylinder; 4. connector; 41. sleeve; 42. connecting pipe; 421. conical flexible section; 422. shift ring; 423. rigid connection section; 424. locking nut. DETAILED DESCRIPTION

[0027] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of the present application, in order to facilitate the description of the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "lateral", "transverse", "longitudinal", etc. to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail areas in the length direction of the corresponding part, and "side part" indicates the head and tail areas in the width direction of the corresponding part; this is for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0028] Embodiment 1, in combination with the attached Figure 1-5A pantograph pressure switch test device includes a test machine device 1 capable of adjusting the test air pressure; as required, the test machine device 1 includes a fixed box 11, the fixed box 11 has two upper and lower chambers, the lower chamber of the fixed box 11 is provided with an air source device 12, the upper chamber of the fixed box 11 is provided with a test machine 13 capable of adjusting the test air pressure, the test machine 13 is correspondingly connected to the air source device 12, and the test machine 13 is correspondingly connected to the hard connection section 423 through an air pipe. Further, the test machine 13 has a pressure regulating valve 132 and an air pressure detection module 133; it should be noted that: when the pressure regulating valve 132 is opened to the maximum, the adjusted air pressure is CkPa, and CkPa ≥ BkPa, and when the pressure regulating valve 132 is opened to the minimum, the adjusted air pressure is DkPa, and DkPa ≤ AkPa.

[0029] As required, the test bench 2 and the cylinder 3 can be installed on the top surface of the fixed box 11, or can be installed in other suitable positions close to the fixed box 11, with the operator moving a short distance and operating conveniently as the basis, and no specific limitation is made. This embodiment is described by taking the installation on the top surface of the fixed box 11 as an example.

[0030] It also includes a test bench 2 and a cylinder 3 for fixing the pantograph pressure switch; as needed, a placement slot 21 for placing the pantograph pressure switch is provided on the top surface of the test bench 2; specifically, the placement slot 21 is designed in a contour according to the structure of the pantograph pressure switch to ensure that the portion of the pantograph pressure switch inserted into the placement slot 21 matches the placement slot 21, thereby ensuring that the pantograph pressure switch will not move at will in the placement slot 21.

[0031] The outer end of the telescopic shaft of the cylinder 3 is provided with a connector 4 which can be sealed and connected to the gas circuit joint of the pantograph pressure switch;

[0032] The connector 4 includes a sleeve 41 with a tapered inner cavity and a connecting pipe 42. The sleeve 41 is arranged at the outer end of the telescopic shaft of the cylinder 3, and the central axis of the sleeve 41 is parallel to the central axis of the telescopic shaft of the cylinder 3; the connecting pipe 42 includes a tapered flexible section 421, and the tapered flexible section 421 is matched and inserted in the inner cavity of the sleeve 41. A shift ring 422 is provided at the large end of the tapered flexible section 421, and the shift ring 422 is fitted with the corresponding end face of the sleeve 41. It should be noted that the shift ring 422 is made of hard material, which can ensure that the connecting pipe 42 will not fall off the sleeve 41 during disassembly. A rigid connection section 423 extending out of the inner cavity of the sleeve 41 is provided at the small end of the conical flexible section 421, and the rigid connection section 423 is connected to the testing machine device 1 via an air pipe, and a locking nut 424 is threadedly connected to the outer periphery of the rigid connection section 423, so that the locking nut 424 and the shifting ring 422 can cooperate to ensure that the conical flexible section 421 is stably fixed in the inner cavity of the sleeve 41.

[0033] As needed, the sleeve 41 is provided with a mounting portion that can be fixedly mounted on the outer end of the telescopic shaft of the cylinder 3. The specific structure of the mounting portion can be set according to the structure of the outer end of the telescopic shaft of the cylinder 3, and is not specifically limited here.

[0034] Specifically, the inner diameter of the large end of the conical flexible section 421 is larger than the outer diameter of the pantograph pressure switch air path connector, and the inner diameter of the small end of the conical flexible section 421 is smaller than the outer diameter of the pantograph pressure switch air path connector; thus, when the connecting pipe 42 contacts the pantograph pressure switch air path connector and there is axial pressure, the inner wall of the conical flexible section 421 can be tightly in contact with the pantograph pressure switch air path connector, and according to the deformation characteristics of the conical flexible section 421, the conical flexible section 421 is sealed and connected with the pantograph pressure switch air path connector. As needed, the conical flexible section 421 can be made of materials such as silicone, rubber or PVC.

[0035] When in use, first install the pantograph pressure switch to be tested in the placement slot 21 of the test bench 2, then start the cylinder 3, the cylinder 3 drives the sleeve 41 to move, the sleeve 41 drives the connecting pipe 42 to move, and is coaxially sleeved on the pantograph pressure switch gas path joint, so that the conical flexible section 421 in the connecting pipe 42 is sealed and connected with the pantograph pressure switch gas path joint; similarly, when disassembling, only the cylinder 3 needs to be retracted. Compared with the prior art of rotating the threaded sleeve one circle at a time, the disassembly speed is faster and the efficiency is higher.

[0036] During the inspection, first, the air pressure environment of the pantograph pressure switch is made greater than BkPa through the pressure regulating valve 132, and the state of the pantograph pressure switch is observed. If the pantograph pressure switch is in the open state, the pantograph pressure switch is unqualified; then the air pressure environment is adjusted to BkPa through the pressure regulating valve 132. When the air pressure environment is stable, the air pressure environment is slowly adjusted to AkPa through the pressure regulating valve 132. At this time, the state of the pantograph pressure switch is observed. If the pantograph pressure switch is in the open state, the pantograph pressure switch is qualified, otherwise it is unqualified.

[0037] Embodiment 2, combined with the attached Figure 1-4 A pantograph pressure switch testing device, based on the first embodiment, the placement slot 21 is tilted up and down so that the pantograph pressure switch air circuit connector located in the placement slot 21 is tilted upward; the cylinder 3 is also tilted up and down so that the central axis of the telescopic shaft of the cylinder 3 is parallel to the central axis of the pantograph pressure switch air circuit connector located in the placement slot 21, that is, the cylinder 3 can drive the sleeve 41 and the connecting pipe 42 to move, so that the connecting pipe 42 is coaxially sleeved on the pantograph pressure switch air circuit connector.

[0038] In this way, the direction of the force applied by the sleeve 41 and the connecting tube 42 to the pantograph pressure switch is inclined downward, so the pantograph pressure switch will no longer fall out of the placement groove 21 during this process.

[0039] Embodiment 3, in combination with the attached Figure 1-5 A pantograph pressure switch testing device, based on the first embodiment, the testing machine 13 has a control valve 131, the air inlet end of the control valve 131 is correspondingly connected to the air outlet end of the air source device 12, the air outlet end of the control valve 131 is correspondingly connected to the air inlet end of the pressure regulating valve 132, the air outlet end of the pressure regulating valve 132 is correspondingly connected to the hard connection section 423, and an air pressure detection module 133 is provided between the pressure regulating valve 132 and the hard connection section 423.

[0040] In this way, during testing, the pressure regulating valve 132 can be opened to the maximum value first, and then the control valve 131 can be opened to make the test air pressure directly higher than BkPa. Compared with the first embodiment, in which the air pressure is opened from zero to higher than BkPa through the pressure regulating valve 132, gas waste can be reduced.

[0041] Furthermore, the control valve 131 may be a solenoid valve, and the test machine 13 may have a display screen 134. Preferably, the air pressure detection module 133 uses an air pressure sensor, and the display screen 134 is connected to the air pressure detection module 133 by signal to display the regulated air pressure.

[0042] It should be noted that the testing machine 13 also has a power supply or a connector connected to a power supply.

[0043] In order to directly observe the state of the pantograph pressure switch, the test machine 13 also has a display light 135 that can be connected to the signal of the pantograph pressure switch to be tested, so as to detect the state of the pantograph pressure switch to be tested. That is to say, when the air pressure of the pantograph pressure switch to be tested is lower than its threshold value, the pantograph pressure switch is energized, so that the display light 135 is energized and illuminated, and then it can be intuitively known whether the pantograph pressure switch to be tested is in the energized state, that is, the open state.

[0044] As required, two display lights 135 may also be provided. Specifically, during the test, when the pantograph pressure switch to be tested is in the closed state, one display light 135 is in the energized state and the other display light 135 is in the de-energized state. When the pantograph pressure switch to be tested is in the open state, both display lights 135 are in the energized state, or the de-energized states of the two display lights 135 are interchanged. Preferably, the two display lights 135 emit light of different colors.

[0045] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A pantograph pressure switch testing device, comprising a testing machine device (1) capable of adjusting the test air pressure, characterized in that: It also includes a test bench (2) and a cylinder (3) for fixing the pantograph pressure switch, wherein the outer end of the telescopic shaft of the cylinder (3) is provided with a connector (4) capable of being in sealing communication with the air path joint of the pantograph pressure switch; The connector (4) comprises a sleeve (41) with a conical inner cavity and a connecting pipe (42), wherein the sleeve (41) is arranged at the outer end of the telescopic shaft of the cylinder (3), and the central axis of the sleeve (41) is parallel to the central axis of the telescopic shaft of the cylinder (3); the connecting pipe (42) comprises a conical flexible section (421), wherein the conical flexible section (421) is matched and plugged into the inner cavity of the sleeve (41), a stop ring (422) is provided at the large end of the conical flexible section (421), and the stop ring (422) is in contact with the corresponding end surface of the sleeve (41), and a hard connection section (423) extending out of the inner cavity of the sleeve (41) is provided at the small end of the conical flexible section (421), and the hard connection section (423) is correspondingly connected to the test machine device (1) through an air pipe, and a locking nut (424) is screwed on the outer periphery of the hard connection section (423).

2. A pantograph pressure switch testing device according to claim 1, characterized in that: The top surface of the test bench (2) is provided with a placement groove (21) for placing a pantograph pressure switch.

3. A pantograph pressure switch testing device according to claim 2, characterized in that: The placement groove (21) is arranged to be tilted up and down, so that the gas path connector of the pantograph pressure switch located in the placement groove (21) is tilted upward; The cylinder (3) is arranged to be tilted up and down so that the central axis of the telescopic shaft of the cylinder (3) is parallel to the central axis of the pantograph pressure switch air path joint located in the placement groove (21).

4. A pantograph pressure switch testing device according to claim 1, characterized in that: The testing machine device (1) comprises a fixed box (11), the fixed box (11) having two upper and lower chambers, the lower chamber of the fixed box (11) being provided with an air source device (12), the upper chamber of the fixed box (11) being provided with a testing machine (13) capable of adjusting the test air pressure, the testing machine (13) being connected to the air source device (12) correspondingly, and the testing machine (13) being connected to the hard connection section (423) correspondingly via an air pipe.

5. A pantograph pressure switch testing device according to claim 4, characterized in that: The testing machine (13) comprises a control valve (131), a pressure regulating valve (132) and an air pressure detection module (133); an air inlet end of the control valve (131) is correspondingly connected to an air outlet end of an air source device (12); an air outlet end of the control valve (131) is correspondingly connected to an air inlet end of the pressure regulating valve (132); an air outlet end of the pressure regulating valve (132) is correspondingly connected to a hard connection section (423); and an air pressure detection module (133) is provided between the pressure regulating valve (132) and the hard connection section (423).

6. A pantograph pressure switch testing device according to claim 5, characterized in that: The testing machine (13) has a display screen (134), and the display screen (134) is connected to the air pressure detection module (133) by signal so as to display the air pressure after pressure adjustment.

7. A pantograph pressure switch testing device according to claim 5, characterized in that: The testing machine (13) also has a display light (135) that can be connected to a signal of a pantograph pressure switch to be tested, so as to facilitate detection of the state of the pantograph pressure switch to be tested.

Images