A gearbox lubricating oil filter element bypass valve opening pressure test device

Abstract

The present invention belongs to the technical field of filter element detection, and specifically relates to an opening pressure test device for a bypass valve of a gearbox lubricating oil filter element, comprising a placement table, a gas cylinder is fixedly installed on the upper side of the placement table, an air pump is fixedly connected to the outer wall of the gas cylinder, the air pump is connected to a through pipe, a pressure gauge is arranged on the through pipe, a test mechanism is arranged at one end of the through pipe away from the air pump, and the test mechanism is placed in a water tank. The opening pressure test device for the bypass valve of the gearbox lubricating oil filter element uses the test mechanism so that the device can simulate the valve core of the bypass valve through a spring and a piston head during use, thereby eliminating the need to replace the bypass valve for detecting different bypass valves. It is only necessary to adjust the deformation of the spring by starting the telescopic end of the electric telescopic rod to extend and retract. The operation is convenient and quick, and the efficiency of detecting different valve bodies is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of filter element detection, in particular to an opening pressure test device for a bypass valve of a gear box lubricating oil filter element. Background Art

[0002] The opening pressure of the bypass valve of the lubricating oil filter element is an important indicator for detecting the performance of the filter element. When the filter element is blocked by pollutants or the filter element expires, the pressure difference on the filter element will increase. When the pressure reaches a certain value, the bypass valve will open to relieve the pressure, thereby ensuring the normal operation of the equipment; when the opening pressure of the bypass valve is low, the lubricating oil filter element has not reached the specified service life and cannot be used. It needs to be replaced, causing waste; when the opening pressure of the bypass valve is high, the lubricating oil filter element has reached the specified service life, but the bypass valve has not yet opened, which will cause insufficient clean lubricating oil in the supply system, causing wear of the equipment.

[0003] At present, in the prior art, a Chinese patent with a publication number of CN208568276U discloses an opening pressure test device for a bypass valve of a gearbox lubricating oil filter element. The device provides gas through an air source, and the gas passes through a gas pressure regulating valve into a fastening mechanism and then into a bypass valve, giving pressure to a gland to press down a spring, thereby exposing a sealing gasket. When the sealing gasket cannot be sealed, the gas passes through the sealing gasket to cause bubbles to form in a water tank, and at the same time, the reading of a pressure gauge on the gas pressure regulating valve is observed, and the pressure is the opening pressure value of the bypass valve. The device has a simple structure, is easy to use, and has strong operability.

[0004] However, during actual use of the device, when testing different valve bodies, the valve body needs to be disassembled and connected to the connector of the test device, and the connection ports of different valve bodies are of different sizes. Therefore, when testing different valve bodies, the efficiency is slow. In view of this, the present invention proposes an opening pressure test device for a bypass valve of a gear box lubricating oil filter element. Summary of the invention

[0005] The main purpose of the present invention is to provide an opening pressure test device for a bypass valve of a gearbox lubricating oil filter element, which can solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention proposes the following technical solutions:

[0007] A device for testing the opening pressure of a bypass valve of a gearbox lubricating oil filter element comprises a placing table, an air cylinder is fixedly mounted on the upper side of the placing table, an air pump is fixedly connected to the outer wall of the air cylinder, the air pump is connected to a through pipe, a pressure gauge is arranged on the through pipe, a testing mechanism is arranged at one end of the through pipe away from the air pump, the testing mechanism is placed in a water tank, and the testing mechanism comprises:

[0008] A filter cartridge, wherein a valve assembly is disposed in the filter cartridge, and a cover plate is detachably connected to the top of the filter cartridge via bolts;

[0009] A positioning column, wherein the positioning column is fixedly connected to the upper side of the cover plate, a connecting seat is abutted on the upper side of the cover plate, the connecting seat is communicated with the through pipe, and a sealing strip is fixedly connected to the upper side of the cover plate;

[0010] The auxiliary sealing component is arranged below the cover plate.

[0011] Preferably, the valve assembly includes a cylinder, which is fixedly connected to the lower side of the cover plate, a through opening is opened on the outer wall of the cylinder, the bottom of the cylinder is detachably connected to a bottom cover, the upper side of the bottom cover is fixedly connected to an electric telescopic rod, a slip ring is slidably connected to the inner wall of the cylinder, a pressure sensor is fixedly connected to the upper side of the slip ring, a push rod is fixedly connected to the upper side of the pressure sensor, a limiting ring is fixedly connected to the inner wall of the cylinder, and a core head assembly is arranged above the push rod.

[0012] Preferably, the core head assembly includes a piston head, a clamping spring is detachably connected between the piston head and the pressure sensor, an oil tank is provided in the piston head, a refueling port is provided on the top of the piston head, and a through hole is provided in the oil tank. After the gas in the gas cylinder enters the connecting seat through the through pipe, the gas squeezes the piston head, causing the piston head to compress the clamping spring. When the piston head no longer blocks the through port, the gas can be discharged from the through port, and then the opening pressure value is detected by the reading of the pressure gauge.

[0013] Preferably, a sliding block is slidably connected to the inner wall of the piston head, a limiting block is fixedly connected to the inner wall of the piston head, a hinged rod is hinged on the outer wall of the sliding block, one end of the hinged rod away from the sliding block is hinged to the moving block, the moving block is elastically connected to the inner wall of the piston head via a connecting spring, the moving block is pushed by the push rod, the moving block compresses the connecting spring, so that the hinged rod moves, and then the sliding block slides in the inner wall of the piston head, the sliding block is separated from the limiting block, and the lubricating oil can enter the second through hole and flow to the outer surface of the piston head, thereby realizing lubrication of the piston head during movement, reducing the wear of the piston head during movement, and improving the service life of the piston head.

[0014] Preferably, a second through hole is provided in the piston head, and a round opening is provided at the bottom of the piston head, and the round opening matches the push rod.

[0015] Preferably, an inner groove is opened in the bottom cover, a slider is slidably connected in the inner groove, the slider and the inner groove are elastically connected by a return spring, a pressure rod is fixedly connected to the side of the slider away from the return spring, a connecting block is fixedly connected to the upper side of the slider, and a clamping block is fixedly connected to the outer wall of the connecting block.

[0016] Preferably, a bayonet is opened in the inner wall of the cylinder, and the bayonet matches the card block. By pressing the pressure rod, the slider compresses the reset spring to drive the connecting block to move, and then the connecting block drives the card block to disengage from the bayonet, thereby realizing the disassembly of the bottom cover, facilitating the subsequent replacement of the clamping spring, and ensuring the accuracy of the test results.

[0017] Preferably, the auxiliary sealing assembly includes an air bin, which is fixedly connected to the lower side of the cover plate, a piston in the air bin is connected to a piston rod, the piston rod is elastically connected to the inner wall of the air bin via a light spring, and an air pipe is connected to the outer wall of the air bin.

[0018] Preferably, a side of the gas chamber below the piston rod is filled with nitrogen, and a side of the gas chamber above the piston rod is not filled with gas.

[0019] Preferably, the piston rod abuts against the screw that fixes the connecting seat, and the end of the air pipe away from the air chamber is connected to the sealing strip, and is threadedly connected to the connecting seat through the screw. When the connecting seat is fixed on the cover plate, the screw will squeeze the piston rod, causing the piston rod to squeeze the air chamber, and the gas in the air chamber enters the sealing strip, causing the sealing strip to expand, thereby ensuring the sealing of the connection between the connecting seat and the cover plate, further improving the accuracy of the test results.

[0020] The present invention provides an opening pressure test device for a bypass valve of a gearbox lubricating oil filter element, which has the following beneficial effects:

[0021] (1) Through the use of the test mechanism, the device can simulate the valve core of the bypass valve through the pressing spring and the piston head during use, so there is no need to replace the bypass valve for testing different bypass valves. It only needs to start the telescopic end of the electric telescopic rod to adjust the deformation of the pressing spring. The operation is convenient and quick, and the efficiency of testing different valve bodies is effectively improved.

[0022] (2) By using the auxiliary sealing assembly, the screw rod is threadedly connected to the connecting seat to fix the connecting seat on the cover plate. The screw rod will squeeze the piston rod, causing the piston rod to squeeze the gas chamber. The gas in the gas chamber enters the sealing strip, causing the sealing strip to expand, thereby ensuring the sealing of the connection between the connecting seat and the cover plate and improving the accuracy of the test results.

[0023] (3) Through the use of the core head assembly, the gas squeezes the piston head. When the piston head compresses the spring and descends, the push rod pushes the moving block, and the moving block compresses the connecting spring, causing the hinge rod to move, and then the sliding block slides in the inner wall of the piston head. The sliding block is separated from the limit block, and the lubricating oil can enter the second through hole and flow to the outer surface of the piston head, thereby achieving lubrication of the piston head during movement, reducing the wear of the piston head during movement, and increasing the service life of the piston head.

[0024] (4) By pressing the pressure rod, the slider compresses the reset spring to drive the connecting block to move, and then the connecting block drives the clamping block to disengage from the clamping mouth, thereby realizing the disassembly of the bottom cover, facilitating the subsequent replacement of the clamping spring after the elasticity of the clamping spring is exhausted, further ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 The overall cross-sectional structure of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 3 The overall cross-sectional structure of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of A;

[0030] Figure 5 It is a partial structural schematic diagram of the test mechanism of the present invention;

[0031] Figure 6 The overall cross-sectional structure of the present invention is shown in FIG. Figure 3 ;

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of middle B;

[0033] Figure 8 For the present invention Figure 7 Schematic diagram of the C structure;

[0034] Fig. 9 For the present invention Figure 7 Schematic diagram of the D structure;

[0035] Fig.10 For the present invention Figure 7 Schematic diagram of the structure of E;

[0036] Fig.11 It is a schematic diagram of the piston head structure of the present invention.

[0037] In the figure: 1, placing table; 2, air cylinder; 3, air pump; 4, pressure gauge; 5, testing mechanism; 6, water tank; 31, through pipe; 51, filter cartridge; 52, valve assembly; 53, cover plate; 54, positioning column; 55, connecting seat; 56, sealing strip; 57, auxiliary sealing assembly; 521, cylinder; 522, through port; 523, bottom cover; 524, electric telescopic rod; 525, slip ring; 526, pressure sensor; 527, top rod; 52 8. Limiting ring; 529. Core head assembly; 5291. Piston head; 5292. Oil tank; 5293. Refueling port; 5294. Through hole one; 5295. Sliding stopper; 5296. Limiting block; 5297. Articulated rod; 5298. Moving block; 5299. Through hole two; 5231. Sliding block; 5232. Press rod; 5233. Connecting block; 5234. Block; 571. Air tank; 572. Piston rod; 573. Air pipe.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 11 The present invention proposes an opening pressure test device for a bypass valve of a gear box lubricating oil filter element, comprising a placing table 1, an air cylinder 2 is fixedly installed on the upper side of the placing table 1, an air pump 3 is fixedly connected to the outer wall of the air cylinder 2, the air pump 3 is connected to a through pipe 31, a pressure gauge 4 is arranged on the through pipe 31, a test mechanism 5 is arranged at one end of the through pipe 31 away from the air pump 3, and the test mechanism 5 is placed in a water tank 6.

[0041] In the embodiment of the present invention, in order to simulate different bypass valves and improve the efficiency of testing different valve bodies, specifically, the test mechanism 5 includes a filter cartridge 51, a positioning column 54 and an auxiliary sealing assembly 57. The filter cartridge 51 is provided with a valve assembly 52. ​​The top of the filter cartridge 51 is detachably connected to a cover plate 53 by bolts. The positioning column 54 is fixedly connected to the upper side of the cover plate 53. The upper side of the cover plate 53 is abutted with a connecting seat 55. The connecting seat 55 is communicated with the through pipe 31. The upper side of the cover plate 53 is fixedly connected to the cover plate 53. The valve assembly 52 includes a cylinder 521, which is fixedly connected to the lower side of the cover plate 53. A through hole 522 is provided on the outer wall of the cylinder 521. A bottom cover 523 is detachably connected to the bottom of the cylinder 521. An electric telescopic rod 524 is fixedly connected to the upper side of the bottom cover 523. A slip ring 525 is slidably connected to the inner wall of the cylinder 521. A pressure sensor 526 is fixedly connected to the upper side of the slip ring 525. The pressure sensor 526 is fixedly connected to the upper side of the slip ring 525. A push rod 527 is fixedly connected to the upper side of the device 526, and a limit ring 528 is fixedly connected to the inner wall of the cylinder 521. A core head assembly 529 is arranged above the push rod 527. The core head assembly 529 includes a piston head 5291. A tightening spring is detachably connected between the piston head 5291 and the pressure sensor 526. By starting the air pump 3, the gas in the air cylinder 2 enters the connecting seat 55 through the through pipe 31, and the gas squeezes the piston head 5291, causing the piston head 5291 to compress the tightening spring and slide downward. When the piston head 5291 no longer blocks the opening 522, the gas can be discharged from the opening 522, and the opening pressure value is detected by the reading of the pressure gauge 4. At the same time, the valve core of the bypass valve is simulated by the pressing spring and the piston head 5291, so there is no need to replace the bypass valve for detecting different bypass valves. It is only necessary to start the extension and contraction of the telescopic end of the electric telescopic rod 524 and adjust the deformation of the pressing spring. The operation is convenient and quick, and the efficiency of detecting different valve bodies is effectively improved.

[0042] Furthermore, in order to reduce the wear of the piston head 5291 and increase the service life of the piston head 5291, specifically, an oil tank 5292 is provided in the piston head 5291, a refueling port 5293 is provided on the top of the piston head 5291, a through hole 5294 is provided in the oil tank 5292, a sliding stopper 5295 is slidably connected to the inner wall of the piston head 5291, a limiting block 5296 is fixedly connected to the inner wall of the piston head 5291, an articulated rod 5297 is hinged on the outer wall of the sliding stopper 5295, and one end of the articulated rod 5297 away from the sliding stopper 5295 is hinged on the moving block 5298, and the moving block 5298 is elastically connected to the inner wall of the piston head 5291 through a connecting spring. A second through hole 5299 is provided in the plug head 5291, and a round opening is provided at the bottom of the piston head 5291, which matches the push rod 527. When the piston head 5291 compresses the spring and descends, the push rod 527 pushes the moving block 5298, and the moving block 5298 compresses the connecting spring to move the hinge rod 5297, so that the sliding block 5295 slides in the inner wall of the piston head 5291, and the sliding block 5295 is separated from the limit block 5296, and the lubricating oil can enter the second through hole 5299 and flow to the outer surface of the piston head 5291, thereby realizing lubrication of the piston head 5291 when it moves, reducing the wear of the piston head 5291 when it moves, and increasing the service life of the piston head 5291.

[0043] In the embodiment of the present invention, in order to be able to quickly replace the clamping spring after the elasticity of the clamping spring is exhausted, specifically, an inner groove is opened in the bottom cover 523, and a slider 5231 is slidably connected in the inner groove. The slider 5231 is elastically connected to the inner groove through a reset spring. A pressure rod 5232 is fixedly connected to the side of the slider 5231 away from the reset spring, and a connecting block 5233 is fixedly connected to the upper side of the slider 5231. A clamping block 5234 is fixedly connected to the outer wall of the connecting block 5233. A bayonet is opened in the inner wall of the cylinder 521, and the bayonet matches the clamping block 5234. By pressing the pressure rod 5232, the slider 5231 compresses the reset spring to drive the connecting block 5233 to move, and then the connecting block 5233 drives the clamping block 5234 to disengage from the bayonet, thereby realizing the disassembly of the bottom cover 523, facilitating the subsequent replacement of the clamping spring after the elasticity of the clamping spring is exhausted, and ensuring the accuracy of the test results.

[0044] Furthermore, in order to further ensure the accuracy of the test results, specifically, the auxiliary sealing assembly 57 includes an air chamber 571, the air chamber 571 is fixedly connected to the lower side of the cover plate 53, the piston in the air chamber 571 is connected to a piston rod 572, the piston rod 572 is elastically connected to the inner wall of the air chamber 571 through a light spring, the outer wall of the air chamber 571 is connected to an air pipe 573, the side of the air chamber 571 below the piston rod 572 is filled with nitrogen, and the side of the air chamber 571 above the piston rod 572 is not filled with nitrogen. It is filled with gas, and the piston rod 572 is in contact with the screw that fixes the connecting seat 55. The end of the air pipe 573 away from the air chamber 571 is connected with the sealing strip 56. When the screw is threadedly connected to the connecting seat 55 to fix the connecting seat 55 on the cover plate 53, the screw will squeeze the piston rod 572, so that the piston rod 572 squeezes the air chamber 571, and the gas in the air chamber 571 enters the sealing strip 56, causing the sealing strip 56 to expand, thereby ensuring the sealing of the connection between the connecting seat 55 and the cover plate 53 and improving the accuracy of the test results.

[0045] It should be noted that the above-mentioned electrical components are all existing technology products. Technical personnel in this field select, install and complete the circuit debugging work according to the needs of use to ensure that all electrical appliances can work normally. The components are all universal standard parts or components known to technical personnel in this field. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. The applicant does not make specific restrictions here.

[0046] When in use, first start the air pump 3, the gas in the air cylinder 2 enters the connecting seat 55 through the through pipe 31, the gas squeezes the piston head 5291, causing the piston head 5291 to compress the spring and slide downward, when the piston head 5291 no longer blocks the through port 522, the gas can be discharged from the through port 522, and the discharged gas enters the water tank 6, the water in the water tank 6 will swell with bubbles, and then the opening pressure value is detected by the reading of the pressure gauge 4. In this process, when the piston head 5291 presses During the process of the compression spring descending, the push rod 527 pushes the moving block 5298, and the moving block 5298 compresses the connecting spring, so that the hinge rod 5297 moves, and then the sliding block 5295 slides in the inner wall of the piston head 5291, and the sliding block 5295 is separated from the limit block 5296, and the lubricating oil can enter the second through hole 5299 and flow to the outer surface of the piston head 5291, thereby realizing lubrication of the piston head 5291 when it moves, and reducing the wear of the piston head 5291 when it moves;

[0047] At the same time, when the screw rod is threadedly connected with the connecting seat 55 to fix the connecting seat 55 on the cover plate 53, the screw rod will squeeze the piston rod 572, so that the piston rod 572 squeezes the gas chamber 571, and the gas in the gas chamber 571 enters the sealing strip 56, so that the sealing strip 56 expands, thereby improving the sealing performance between the connecting seat 55 and the cover plate 53;

[0048] At the same time, after the elasticity of the clamping spring is exhausted, by pressing the pressure rod 5232, the slider 5231 compresses the reset spring to drive the connecting block 5233 to move, and then the connecting block 5233 drives the clamping block 5234 to disengage from the clamping mouth, thereby realizing the disassembly of the bottom cover 523 and replacing the clamping spring.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A device for testing the opening pressure of a bypass valve of a gearbox lubricating oil filter element, comprising a placement table (1), characterized in that: An air cylinder (2) is fixedly mounted on the upper side of the placement table (1); an air pump (3) is fixedly connected to the outer wall of the air cylinder (2); the air pump (3) is connected to a through pipe (31); a pressure gauge (4) is provided on the through pipe (31); a test mechanism (5) is provided at one end of the through pipe (31) away from the air pump (3); the test mechanism (5) is placed in a water tank (6); and the test mechanism (5) comprises: A filter cartridge (51) is provided with a valve assembly (52); the top of the filter cartridge (51) is detachably connected to a cover plate (53) via bolts; the valve assembly (52) comprises a cylinder (521); the cylinder (521) is fixedly connected to the lower side of the cover plate (53); a through hole (522) is provided on the outer wall of the cylinder (521); the bottom of the cylinder (521) is detachably connected to a bottom cover (523); the upper side of the bottom cover (523) is fixedly connected to an electric valve. The telescopic rod (524) is slidably connected to a slip ring (525) on the inner wall of the cylinder (521), a pressure sensor (526) is fixedly connected to the upper side of the slip ring (525), a push rod (527) is fixedly connected to the upper side of the pressure sensor (526), ​​a limit ring (528) is fixedly connected to the inner wall of the cylinder (521), a core head assembly (529) is arranged above the push rod (527), and the core head assembly (529) includes a piston head (5291). A pressing spring is detachably connected between the piston head (5291) and the pressure sensor (526); an oil tank (5292) is provided in the piston head (5291); a refueling port (5293) is provided on the top of the piston head (5291); a through hole (5294) is provided in the oil tank (5292); a sliding stopper (5295) is slidably connected to the inner wall of the piston head (5291); a limiting block (5295) is fixedly connected to the inner wall of the piston head (5291); 6) A hinged rod (5297) is hinged on the outer wall of the sliding stopper (5295), and one end of the hinged rod (5297) away from the sliding stopper (5295) is hinged on the moving block (5298), and the moving block (5298) is elastically connected to the inner wall of the piston head (5291) via a connecting spring, and a second through hole (5299) is provided in the piston head (5291), and a round opening is provided at the bottom of the piston head (5291), and the round opening matches the push rod (527); A positioning column (54), the positioning column (54) being fixedly connected to the upper side of the cover plate (53), a connecting seat (55) being abutted against the upper side of the cover plate (53), the connecting seat (55) being communicated with the through pipe (31), and a sealing strip (56) being fixedly connected to the upper side of the cover plate (53); An auxiliary sealing component (57), wherein the auxiliary sealing component (57) is arranged below the cover plate (53).

2. The opening pressure test device of the bypass valve of the gearbox lubricating oil filter according to claim 1 is characterized in that: An inner groove is formed in the bottom cover (523), a slider (5231) is slidably connected in the inner groove, the slider (5231) is elastically connected to the inner groove via a return spring, a pressure rod (5232) is fixedly connected to the side of the slider (5231) away from the return spring, a connecting block (5233) is fixedly connected to the upper side of the slider (5231), and a clamping block (5234) is fixedly connected to the outer wall of the connecting block (5233).

3. The opening pressure test device of the bypass valve of the gearbox lubricating oil filter according to claim 2 is characterized in that: A bayonet is provided in the inner wall of the cylinder (521), and the bayonet matches the clamping block (5234).

4. The opening pressure test device of the bypass valve of the gearbox lubricating oil filter according to claim 1 is characterized in that: The auxiliary sealing assembly (57) comprises an air bin (571), wherein the air bin (571) is fixedly connected to the lower side of the cover plate (53), a piston in the air bin (571) is connected to a piston rod (572), the piston rod (572) is elastically connected to the inner wall of the air bin (571) via a light spring, and an air pipe (573) is connected to the outer wall of the air bin (571).

5. The opening pressure test device of the bypass valve of the gearbox lubricating oil filter according to claim 4 is characterized in that: A side of the gas chamber (571) located below the piston rod (572) is filled with nitrogen, and a side of the gas chamber (571) located above the piston rod (572) is not filled with gas.

6. The opening pressure test device of the bypass valve of the gearbox lubricating oil filter according to claim 4, characterized in that: The piston rod (572) is in contact with a screw rod of the fixed connection seat (55), and one end of the air pipe (573) away from the air bin (571) is in communication with the sealing strip (56).

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