Endurance test device for pressure-limiting valve

Abstract

The utility model relates to the technical field of valve test equipment, in particular to an endurance test device for a pressure-limiting valve. The clamping device comprises a clamping assembly and a telescopic assembly. The telescopic assembly comprises a fixedly-installed telescopic mechanism and an execution rod fixedly connected with the telescopic end of the telescopic mechanism. A telescopic mechanism in the telescopic assembly is controlled to be started, the telescopic mechanism drives an execution rod fixedly connected with the telescopic end of the telescopic mechanism to stretch out and draw back, the execution rod can enter the containing cavity through the penetrating hole when stretching out to apply pressure to a pressure limiting valve of the containing cavity, and the execution rod does not apply pressure to the pressure limiting valve when retracting. Pressure is applied to the pressure-limiting valve through back-and-forth stretching or long-time stretching of the execution rod, the pressure borne by the pressure-limiting valve in use is simulated, and then the durability of the pressure-limiting valve is tested. According to the scheme, the first clamping seat is detachably connected to the mounting piece, the second clamping seat is detachably connected with the first clamping seat, different first clamping seats and second clamping seats can be designed for pressure limiting valves of different models and specifications, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of valve testing equipment, in particular to a durability testing device for a pressure limiting valve. Background Art

[0002] The pressure limiting valve is an important component of the automobile steering system. As the name suggests, it controls the oil pressure. Its function is that when the speed of the automobile steering gear increases, the oil pressure will increase accordingly. If the pressure is too high, the oil will enter the combustion chamber, causing carbon deposits and excessive oil loss. Therefore, a pressure limiting valve is installed to control the pressure of the steering gear; such as the automobile steering gear pressure limiting valve disclosed in patent No. CN202222483746.5, the pressure limiting valve is equipped with a spring inside. When the pressure at the valve port (i.e., the oil inlet channel) reaches the required pressure, the pressure limiting valve is pushed to open. When the pressure at the valve port does not reach the required pressure, the pressure limiting valve automatically closes under the action of the spring; after long-term use of multiple openings and closings, the pressure limiting valve may have a weakened opening or closing ability, resulting in the pressure limiting valve being unable to open or close normally, affecting the normal use of the automobile steering gear system; therefore, it is particularly important to conduct an endurance test of how many times the pressure limiting valve can withstand opening and closing.

[0003] Based on this, the applicant considered designing a pressure limiting valve durability test device capable of testing the durability of the pressure limiting valve. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a pressure limiting valve durability test device capable of testing the durability of the pressure limiting valve.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A pressure-limiting valve durability test device, comprising a clamping assembly and a telescopic assembly;

[0007] The telescopic assembly includes a fixedly mounted telescopic mechanism and an actuator rod fixedly connected to the telescopic end thereof;

[0008] The clamping assembly includes a first clamping seat and a second clamping seat that are detachably connected, the first clamping seat is detachably connected to the mounting member, and the first clamping seat and the second clamping seat are respectively provided with a first accommodating groove for accommodating the bottom of the pressure-limiting valve and a second accommodating groove for accommodating the top of the pressure-limiting valve on opposite sides, the first accommodating groove and the second accommodating groove accommodate an accommodating cavity of the pressure-limiting valve, and the clamping assembly is provided with a through hole that is connected to the accommodating cavity and for the actuator rod to pass through.

[0009] The working principle and advantages of a pressure limiting valve durability test device in this technical solution are:

[0010] Before testing the pressure-limiting valve, first install the first clamping seat on the mounting piece, then put the bottom of the pressure-limiting valve into the first receiving groove on the first clamping seat, then connect the second clamping seat to the first clamping seat, and place the top of the pressure-limiting valve in the second receiving groove, clamp the pressure-limiting valve by the first clamping seat and the second clamping seat, and stably place the pressure-limiting valve in the receiving cavity; during the experiment, control the telescopic mechanism in the telescopic assembly to start, so that the telescopic mechanism drives the actuator rod fixedly connected to its telescopic end to extend and retract, and when the actuator rod is extended, it can enter the receiving cavity through the perforation to apply pressure to the pressure-limiting valve in the receiving cavity, and when the actuator rod is retracted, it no longer applies pressure to the pressure-limiting valve, and pressure is applied to the pressure-limiting valve by retracting and retracting the actuator rod back and forth or extending it for a long time, simulating the pressure that the pressure-limiting valve bears when in use, and then testing the durability of the pressure-limiting valve; and the first clamping seat of the present scheme is detachably connected to the mounting piece, and the second clamping seat is detachably connected to the first clamping seat, so that different first clamping seats and second clamping seats can be designed for pressure-limiting valves of different models and specifications, and the application range is wide.

[0011] Furthermore, a limiting member is detachably connected to the clamping assembly, a limiting hole is formed on the limiting member for the actuator rod to pass through, and the limiting member and the center of the through hole are located on the same axis.

[0012] Furthermore, semi-arc plates are fixedly connected to the side walls on the same side of the first clamping seat and the second clamping seat, and when the first clamping seat is connected to the second clamping seat, the two semi-arc plates form a connecting ring; the limiting member is provided with a connecting groove, and the inner side wall of the connecting groove and the outer side wall of the connecting ring are threadedly connected.

[0013] Furthermore, the mounting member includes a mounting plate, a support block is protruding from the first clamping seat, and screw holes threadedly connected to the first bolts are correspondingly provided on the support block and the top side of the mounting plate.

[0014] Furthermore, a plurality of supporting legs are fixed to the bottom side of the mounting plate.

[0015] Furthermore, the telescopic mechanism is detachably connected to the mounting plate.

[0016] Furthermore, it also includes a connecting hoop, the middle of which is an arch corresponding to the end of the telescopic mechanism, and screw holes for threaded connection with a third bolt are provided at both ends of the connecting hoop corresponding to the top side of the mounting plate.

[0017] Furthermore, the first clamping seat and the second clamping seat are both protrudingly provided with extension plates, and the extension plates of the first clamping seat and the second clamping seat are correspondingly provided with screw holes threadedly connected to the second bolts.

[0018] Furthermore, one end of the actuator rod away from the telescopic mechanism is fixedly connected to a pressure sensor.

[0019] Furthermore, it also includes a controller, which is in communication connection with the pressure sensor and the telescopic mechanism, and is used to control the telescopic end of the telescopic mechanism and collect data from the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The three-dimensional structure diagram of the pressure limiting valve durability test device of the utility model embodiment is shown in FIG. Figure 1 ;

[0021] Figure 2 The three-dimensional structure diagram of the pressure limiting valve durability test device of the utility model embodiment is shown in FIG. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the top view of the structure of the pressure limiting valve durability test device according to an embodiment of the utility model;

[0023] Figure 4 This is a front view structural diagram of a pressure limiting valve durability test device according to an embodiment of the utility model;

[0024] Figure 5 It is a front view cross-sectional structure diagram of the clamping assembly and the limiting member of the embodiment of the utility model;

[0025] Figure 6 It is a left-side structural schematic diagram of the clamping assembly of the embodiment of the utility model;

[0026] Figure 7 It is a three-dimensional structural schematic diagram of a position-limiting member according to an embodiment of the utility model;

[0027] Figure 8 This is a front view structural diagram of the telescopic mechanism, the actuator rod and the pressure sensor of the embodiment of the utility model;

[0028] In the above drawings: 100, mounting plate; 110, supporting leg;

[0029] 210, first clamping seat; 211, first receiving groove; 212, support block; 2121, first bolt; 220, second clamping seat; 221, second receiving groove; 230, extension plate; 231, second bolt; 240, through hole; 250, semi-arc plate;

[0030] 300, limiting member; 310, connecting groove; 320, limiting hole;

[0031] 400, telescopic mechanism; 410, actuator rod; 411, pressure sensor; 420, connecting hoop; 421, third bolt;

[0032] 500. Controller. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] Refer to Figure 1 to Figure 8 , this embodiment provides a pressure-limiting valve durability test device, which includes a clamping assembly and a telescopic assembly;

[0035] The telescopic assembly includes a fixedly mounted telescopic mechanism 400 and an actuator rod 410 fixedly connected to the telescopic end thereof;

[0036] The clamping assembly includes a first clamping seat 210 and a second clamping seat 220 that are detachably connected. The first clamping seat 210 is detachably connected to the mounting member. The first clamping seat 210 and the second clamping seat 220 are provided with a first receiving groove 211 for accommodating the bottom of the pressure limiting valve and a second receiving groove 221 for accommodating the top of the pressure limiting valve on opposite sides thereof. The first receiving groove 211 and the second receiving groove 221 accommodate a receiving cavity of the pressure limiting valve. The clamping assembly is provided with a through hole 240 that is connected to the receiving cavity and for the actuator rod 410 to pass through.

[0037] In this embodiment, before testing the pressure-limiting valve, the first clamping seat 210 is first installed on the mounting member, and then the bottom of the pressure-limiting valve is placed in the first receiving groove 211 on the first clamping seat 210, and then the second clamping seat 220 is connected to the first clamping seat 210, and the top of the pressure-limiting valve is placed in the second receiving groove 221, and the pressure-limiting valve is clamped by the first clamping seat 210 and the second clamping seat 220, so that the pressure-limiting valve is stably placed in the receiving cavity; during the experiment, the telescopic mechanism 400 in the telescopic assembly is controlled to start, so that the telescopic mechanism 400 drives the actuator rod 410 fixedly connected to its telescopic end to telescope, and the actuator rod 410 is telescoped. When extended, the actuator rod 410 can enter the accommodating cavity through the through hole 240 to apply pressure to the pressure-limiting valve in the accommodating cavity. When the actuator rod 410 is retracted, no pressure is applied to the pressure-limiting valve. Pressure is applied to the pressure-limiting valve by retracting and retracting the actuator rod 410 or extending it for a long time, thereby simulating the pressure that the pressure-limiting valve is subjected to when in use, and then testing the durability of the pressure-limiting valve. In addition, the first clamping seat 210 of the present scheme is detachably connected to the mounting member, and the second clamping seat 220 is detachably connected to the first clamping seat 210. Different first clamping seats 210 and second clamping seats 220 can be designed for pressure-limiting valves of different models and specifications, and have a wide range of applications.

[0038] Preferably, if Figure 1 to Figure 7 As shown, a limiting member 300 is detachably connected to the clamping assembly, and a limiting hole 320 is provided on the limiting member 300 for the actuator rod 410 to pass through. The limiting member 300 and the center of the hole of the through hole 240 are located on the same axis; the limiting hole 320 on the limiting member 300 can limit and guide the extension and retraction movement trajectory of the actuator rod 410, so as to prevent the actuator rod 410 from deviating from the movement trajectory and being unable to pass through the through hole 240 to apply pressure to the pressure limiting valve in the accommodating chamber.

[0039] Preferably, if Figure 1 to Figure 7 As shown, a semi-arc plate 250 is fixedly connected to the side wall on the same side of the first clamping seat 210 and the second clamping seat 220, respectively. When the first clamping seat 210 and the second clamping seat 220 are connected, the two semi-arc plates 250 form a connecting ring; the limiting member 300 is provided with a connecting groove 310, and the inner wall of the connecting groove 310 and the outer wall of the connecting ring are threadedly connected; when the limiting member 300 is connected to the connecting ring through the connecting groove 310 thereon, it can connect one side of the first clamping seat 210 and the second clamping seat 220, so that the first clamping seat 210, the second clamping seat 220 and the limiting member 300 form a stably connected whole; specifically, the above-mentioned through hole 240 includes two semi-arc grooves respectively provided on the first clamping seat 210 and the second clamping seat 220, so that the through hole 240 is opposite to the end of the pressure limiting valve placed laterally in the accommodating cavity (because the valve port on the pressure limiting valve is generally arranged at the end, such as the oil inlet channel of the automobile steering pressure limiting valve in the background technology).

[0040] Preferably, if Figure 1~Figure 4As shown, the mounting member includes a mounting plate 100, a first clamping seat 210 protrudingly provided with a support block 212, and screw holes threadedly connected to the first bolt 2121 are opened corresponding to the top side of the support block 212 and the mounting plate 100; the first clamping seat 210 is detachably connected to the mounting plate 100 through the support block 212 and the first bolt 2121 thereon, which is convenient for installation and disassembly. Specifically, a plurality of support legs 110 are fixed to the bottom side of the mounting plate 100 to stably place the mounting plate 100 in the test position.

[0041] Preferably, if Figure 1~Figure 4 As shown, the telescopic mechanism 400 is detachably connected to the mounting plate 100, and the pressure-limiting valve durability test device also includes a connecting hoop 420, the middle of the connecting hoop 420 is an arch corresponding to the end of the telescopic mechanism 400, and screw holes threadedly connected to the third bolt 421 are provided at both ends of the connecting hoop 420 corresponding to the top side of the mounting plate 100; the telescopic mechanism 400 is detachably connected to the mounting plate 100 through the cooperation of the connecting hoop 420 and the third bolt 421, which is convenient for debugging, maintenance or replacement of the telescopic mechanism 400.

[0042] Preferably, if Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the first clamping seat 210 and the second clamping seat 220 are both protrudingly provided with an extension plate 230, and the extension plate 230 of the first clamping seat 210 and the extension plate 230 of the second clamping seat 220 are correspondingly provided with screw holes threadedly connected to the second bolt 231; the first clamping seat 210 and the second clamping seat 220 are detachably connected through the cooperation of the extension plate 230 thereon and the second bolt 231, which is convenient for installation and disassembly. Specifically, the two side walls opposite to the first clamping seat 210 and the second clamping seat 220 are both provided with extension plates 230, so that the connection between the first clamping seat 210 and the second clamping seat 220 is more stable.

[0043] Preferably, if Figure 1 to Figure 7 As shown, one end of the actuator rod 410 away from the telescopic mechanism 400 is fixedly connected to a pressure sensor 411 ; the pressure sensor 411 on the actuator rod 410 can detect the pressure between the actuator rod 410 and the pressure limiting valve.

[0044] Preferably, if Figure 1 to Figure 7As shown, the pressure-limiting valve durability test device also includes a controller 500, which is connected to the pressure sensor 411 and the telescopic mechanism 400 for communication. The controller 500 is used to control the telescopic end of the telescopic mechanism 400 and collect data from the pressure sensor 411; the controller 500 is fixedly mounted on the above-mentioned mounting plate 100, and the controller 500 enables the staff to better grasp the test process and data; specifically, the controller can control the telescopic frequency, time and speed of the telescopic mechanism 400, and the controller 500 can collect and display the data detected by the pressure sensor 411 in real time, thereby facilitating the staff to observe the changes in the pressure-limiting valve during the test; the pressure sensor 411 and the telescopic mechanism 400 can be connected to the controller 500 for communication via a data line or wireless communication technology.

[0045] Specifically, the telescopic mechanism 400 can directly adopt the electric telescopic rod in the prior art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A pressure limiting valve durability test device, characterized in that: It includes a clamping component and a telescopic component; The telescopic assembly includes a fixedly mounted telescopic mechanism and an actuator rod fixedly connected to the telescopic end thereof; The clamping assembly includes a first clamping seat and a second clamping seat that are detachably connected, the first clamping seat is detachably connected to the mounting member, and the first clamping seat and the second clamping seat are respectively provided with a first accommodating groove for accommodating the bottom of the pressure-limiting valve and a second accommodating groove for accommodating the top of the pressure-limiting valve on opposite sides, the first accommodating groove and the second accommodating groove accommodate an accommodating cavity of the pressure-limiting valve, and the clamping assembly is provided with a through hole that is connected to the accommodating cavity and for the actuator rod to pass through.

2. A pressure limiting valve durability test device as claimed in claim 1, characterized in that: The clamping assembly is detachably connected to a limiting member, the limiting member is provided with a limiting hole for the actuator rod to pass through, and the limiting member and the hole center of the through hole are located on the same axis.

3. A pressure limiting valve durability test device as claimed in claim 2, characterized in that: Semi-arc plates are fixedly connected to the side walls on the same side of the first clamping seat and the second clamping seat, respectively. When the first clamping seat is connected to the second clamping seat, the two semi-arc plates form a connecting ring. The limiting member is provided with a connecting groove, and the inner side wall of the connecting groove and the outer side wall of the connecting ring are threadedly connected.

4. A pressure limiting valve durability test device as claimed in claim 1, characterized in that: The mounting member comprises a mounting plate, a support block is protruding from the first clamping seat, and screw holes threadedly connected to the first bolts are correspondingly provided on the support block and the top side of the mounting plate.

5. A pressure limiting valve durability test device as claimed in claim 4, characterized in that: A plurality of supporting legs are fixed on the bottom side of the mounting plate.

6. A pressure limiting valve durability test device as claimed in claim 4, characterized in that: The telescopic mechanism is detachably connected to the mounting plate.

7. A pressure limiting valve durability test device as claimed in claim 6, characterized in that: It also includes a connecting hoop, the middle of which is an arch corresponding to the end of the telescopic mechanism, and screw holes threadedly connected to the third bolt are opened at both ends of the connecting hoop corresponding to the top side of the mounting plate.

8. A pressure limiting valve durability test device as claimed in claim 1, characterized in that: The first clamping seat and the second clamping seat are both protrudingly provided with extension plates, and the extension plates of the first clamping seat and the second clamping seat are correspondingly provided with screw holes threadedly connected with the second bolts.

9. A pressure limiting valve durability test device according to any one of claims 1 to 8, characterized in that: One end of the actuator rod away from the telescopic mechanism is fixedly connected with a pressure sensor.

10. A pressure limiting valve durability test device as claimed in claim 9, characterized in that: It also includes a controller, which is in communication connection with the pressure sensor and the telescopic mechanism, and is used to control the telescopic end of the telescopic mechanism and collect data from the pressure sensor.

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