Pilot valve fatigue test device

Abstract

A pilot valve fatigue test device comprises a box body and is characterized in that a power source is fixed on the box body through an L-shaped support, a cross beam is fixed at the output end of the power source, a plurality of shifting fork mounting shafts are symmetrically fixed on the cross beam, the shifting fork mounting shafts are perpendicular to the cross beam, and rotary shifting forks are respectively mounted on the shifting fork mounting shafts in a penetrating manner along the radial direction. One end of the rotary shifting fork is fork-shaped and is clamped on a pilot valve handle to be tested through clearance fit; a mounting frame is supported on the front side of the box body through a vertical beam, a plurality of mounting holes are symmetrically formed in an upper cross beam of the mounting frame, and the mounting holes correspond to the rotary shifting forks above one by one. The power source drives the cross beam to horizontally reciprocate, so that the shifting fork mounting shaft and the rotary shifting fork can be driven to reciprocate; therefore, the pilot valve handle is driven to swing and reverse back and forth, and high-frequency use positioning test of the pilot valve handle can be realized. Manpower can be saved, the test efficiency is high and the period is short; and a plurality of pilot valves can be tested simultaneously.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a pilot valve fatigue testing device. Technical Background

[0002] As we all know, there are several forms of hydraulic reversing valves: manual reversing, electromagnetic reversing, hydraulic reversing, pneumatic reversing, electro-hydraulic reversing valve, motorized reversing, etc., and the pilot valve is used for hydraulic reversing of hydraulic reversing valves. Commonly used pilot valve handles are divided into positioning type and reset type. The reset type is reset by spring, and the handle automatically returns to the middle position after the external force is removed; the positioning type is double positioning by steel ball + V-groove positioning plus friction positioning.

[0003] Since the positioning pilot valve is prone to unreliable friction positioning after being used for a period of time, it is necessary to inspect it before the product leaves the factory to test whether the positioning of the pilot valve will become loose after being used frequently for a period of time. According to actual use requirements, 500 actions per day, 500 actions per month / day X 22.75 days = 11,400 times, three months is 1.14X3 = 34,000 times, and six months is 1.14X6 = 68,000 times. According to customer requirements, it must not loosen for at least half a year, so it is reasonable to set the target at 100,000 times.

[0004] As there is no professional testing device at present, the testing process can only be completed manually, that is, the pilot valve is quickly operated manually to achieve reversal, and then the positioning test is performed after a certain number of reversals. This is not only labor-intensive and wastes manpower, but also has inaccurate counting and a long test cycle. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a pilot valve fatigue test device which can save manpower and has high test efficiency and short cycle.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A pilot valve fatigue test device comprises a box body, a power source is fixed on the box body through an L-shaped support, a horizontally arranged crossbeam is fixed at the output end of the power source, a plurality of shift fork mounting shafts are symmetrically fixed on the crossbeam, the shift fork mounting shafts are arranged vertically to the crossbeam, and rotating shift forks are radially penetrated and installed on the shift fork mounting shafts, one end of the rotating shift fork is fork-shaped and is clamped on the pilot valve handle to be tested through clearance fit, so as to drive the pilot valve handle to swing back and forth and switch directions;

[0008] A mounting frame is supported by a vertical beam on the front side of the box body, and a plurality of mounting holes are symmetrically arranged on the upper crossbeam of the mounting frame. The mounting holes correspond one by one to the rotating forks above and are used to install the pilot valve to be tested.

[0009] As a further preference, the device is also provided with a bracket, and the box body and the vertical beam are fixed on the bracket.

[0010] As a further preference, two strip-shaped long holes are provided on the top surface of the box body, and the L-shaped support is fixed to the box body by bolts passing through the strip-shaped long holes, so as to facilitate adjustment of the position of the power source.

[0011] As a further preference, the power source is a cylinder with a built-in magnetic ring, and magnetic switches are fixed to the cylinder body of the cylinder near both ends through sleeves to facilitate control of the reciprocating stroke of the power source.

[0012] As a further preference, a fixing plate is provided on one side of the L-shaped support, and a guide assembly is connected between the fixing plate and the crossbeam to achieve horizontal movement of the crossbeam.

[0013] As a further preference, a strip hole is provided on the vertical beam along the vertical direction, the mounting frame is T-shaped, and the column of the mounting frame is fixed to the vertical beam by bolts passing through the strip hole, so as to facilitate adjustment of the height of the mounting frame.

[0014] The beneficial effects of the utility model are:

[0015] Since a mounting frame is supported by a vertical beam on the front side of the box body, a plurality of mounting holes are arranged on the upper crossbeam of the mounting frame, and the mounting holes correspond one-to-one to the rotary forks above, a plurality of pilot valves to be tested can be installed at the same time; by driving the crossbeam to move back and forth horizontally through a power source, the fork mounting shaft and the rotary fork can be driven to move back and forth; by making one end of the rotary fork fork-shaped and clamping it on the handle of the pilot valve to be tested through clearance fit, the handle of the pilot valve can be driven to swing back and forth and switch directions, thereby realizing a high-frequency positioning test of the handle of the pilot valve; manpower can be saved, the test efficiency is high, and the cycle is short; and a plurality of pilot valves can be tested at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a front view of the utility model.

[0018] Figure 3 yes Figure 2 Left view of .

[0019] Figure 4 yes Figure 2 Top view of the .

[0020] In the figure: bracket 1, support seat 2, vertical beam 3, pressure plate 4, mounting frame 5, pilot valve 6, rotary fork 7, fork mounting shaft 8, cross beam 9, L-shaped support 10, magnetic switch 11, power source 12, fixing plate 13, guide assembly 14, box 15, mounting hole 501. DETAILED DESCRIPTION

[0021] like Figure 1 to Figure 4 As shown, the utility model relates to a pilot valve fatigue test device, comprising a bracket 1 welded from channel steel and having a cubic shape, on which a box body 15 and a vertical beam 3 are fixed, and support seats 2 are welded to the lower ends of the box body 15 and the vertical beam 3 respectively, the support seats 2 are channel steel and are buckled on the bracket 1 and fixed by a pressure plate 4 and bolts for easy disassembly; the vertical beam 3 is located on the front side of the box body 15.

[0022] A power source 12 is fixed on the box body 15 by an L-shaped support 10. Two parallel long strip holes are provided on the top surface of the box body 15 along its longitudinal direction. The L-shaped support 10 is fixed on the box body 15 by bolts passing through the long strip holes to facilitate adjustment of the position of the power source 12.

[0023] A horizontally arranged crossbeam 9 is fixed at the output end of the power source 12, and a plurality of shift fork mounting shafts 8 are symmetrically fixed on the crossbeam 9. The crossbeam 9 is made of channel steel, and the shift fork mounting shafts 8 are arranged vertically to the crossbeam 9. One end of the shift fork mounting shaft 8 is provided with a screw hole and is fixed to the front side of the crossbeam 9 by bolts. In this embodiment, four shift fork mounting shafts 8 are taken as an example to facilitate simultaneous testing of four pilot valves.

[0024] A rotating fork 7 is radially installed on the fork mounting shaft 8 at the front side of the crossbeam 9. The rotating fork 7 passes through the fork mounting shaft 8 through a rotating clearance fit and is limited by a nut. One end of the rotating fork 7 is in the shape of a fork with a U-shaped socket and is clamped on the pilot valve handle to be tested through a clearance fit, so as to drive the pilot valve handle to swing back and forth and switch directions.

[0025] The mounting frame 5 is supported by the vertical beam 3 at the front side of the box body 15. The vertical beam 3 is provided with a strip hole in the vertical direction. The mounting frame 5 is T-shaped, and the column of the mounting frame 5 is fixed to the vertical beam 3 by bolts passing through the strip hole, so as to adjust the height of the mounting frame 5. A plurality of rectangular mounting holes 501 are symmetrically provided on the upper crossbeam of the mounting frame 5. The mounting holes 501 correspond to the rotary forks 7 above one by one, and are used to install the pilot valve to be tested.

[0026] The power source 12 is a cylinder or a linear motor. This embodiment takes a cylinder with a built-in magnetic ring as an example. Magnetic switches 11 are fixed to the cylinder body near both ends through sleeves to control the reciprocating stroke of the power source 12.

[0027] A fixed plate 13 is provided on one side of the L-shaped support 10, and a guide assembly 14 is connected between the fixed plate 13 and the cross beam 9. The guide sleeve of the guide assembly 14 is fixed on the fixed plate 13, and the front end of the guide column of the guide assembly 14 is fixed on the cross beam 9, which is used to realize the horizontal movement of the cross beam 9 and prevent the cross beam 9 from rotating.

[0028] When in use, insert the pilot valve 6 to be tested into the mounting hole and fix it on the upper crossbeam of the mounting frame 5 by bolts, and insert the pilot valve handle into the U-shaped socket at one end of the rotating fork 7; adjust the position of the ferrule so that the distance between the two magnetic switches 11 is consistent with the distance of the pilot valve handle's reciprocating swing back and forth.

[0029] Then, the control cylinder is started to drive the crossbeam 9 and the fork mounting shaft 8 to move back and forth horizontally, so that the rotating fork 7 follows the fork mounting shaft 8 to reciprocate. Since the rotating fork 7 passes through the fork mounting shaft 8 through the rotational clearance and is limited by the nut, the rotating fork 7 can rotate during the reciprocating motion, thereby simultaneously pulling the pilot valve handle to swing back and forth and reverse, thereby realizing high-frequency simulation of the pilot valve handle. After the number of reversals reaches the requirement, it can be positioned and tested.

[0030] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A pilot valve fatigue test device, comprising a box, characterized in that: A power source is fixed on the box body through an L-shaped support, a horizontally arranged crossbeam is fixed at the output end of the power source, a plurality of fork mounting shafts are symmetrically fixed on the crossbeam, the fork mounting shafts are arranged vertically to the crossbeam, and rotating forks are radially penetrated and installed on the fork mounting shafts, one end of the rotating fork is fork-shaped and is clamped on the pilot valve handle to be tested through clearance fit, so as to drive the pilot valve handle to swing back and forth and switch directions; A mounting frame is supported by a vertical beam on the front side of the box body, and a plurality of mounting holes are symmetrically arranged on the upper crossbeam of the mounting frame. The mounting holes correspond one by one to the rotating forks above and are used to install the pilot valve to be tested.

2. A pilot valve fatigue test device according to claim 1, characterized in that: The device is also provided with a bracket, and the box body and the vertical beam are fixed on the bracket.

3. The pilot valve fatigue test device according to claim 1 is characterized in that: Two strip-shaped long holes are arranged on the top surface of the box body, and the L-shaped support is fixed on the box body by bolts penetrating the strip-shaped long holes, so as to facilitate the adjustment of the position of the power source.

4. The pilot valve fatigue test device according to claim 1 is characterized in that: The power source is a cylinder with a built-in magnetic ring. Magnetic switches are fixed on the cylinder body of the cylinder near both ends through clamping sleeves to control the reciprocating stroke of the power source.

5. A pilot valve fatigue test device according to any one of claims 1 to 4, characterized in that: A fixing plate is provided on one side of the L-shaped support, and a guide component is connected between the fixing plate and the crossbeam to realize horizontal movement of the crossbeam.

6. A pilot valve fatigue test device according to claim 1, characterized in that: The vertical beam is provided with a strip hole in the vertical direction, the mounting frame is T-shaped, and the column of the mounting frame is fixed to the vertical beam by bolts passing through the strip hole, so as to adjust the height of the mounting frame.

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