Oil pipe quick connector assembly for hydraulic switch machine

Abstract

The utility model discloses an oil pipe quick connector assembly for a hydraulic point switch. The oil pipe quick connector assembly comprises a plug assembly. The plug assembly comprises a plug shell, a conical sealing plug valve arranged in an inner cavity of the plug shell and a spring arranged at one end of the plug valve in a sleeving mode. The first rubber sealing ring is arranged at the end, away from the spring, of the plug valve and arranged on the plug valve in a sleeving mode. One end of the plug assembly away from the plug valve is provided with a threaded interface; the spring limiting bush is arranged at one end, far away from the plug valve, of the spring and abuts against the spring; the socket assembly comprises a socket shell with a guide conical surface, a plunger type socket valve arranged in an inner cavity of the socket shell, a first valve spring, a second valve spring, a valve lining capable of sliding axially, a second rubber sealing ring located at the front end of the socket and a locking mechanism, wherein the first valve spring and the second valve spring are arranged on the outer side of the socket valve in a sleeving mode. Compared with a traditional thread locking straight-through joint, the hydraulic switch machine is convenient to disassemble and assemble, the disassembly and assembly process is simpler and more convenient, and therefore the detection efficiency of the hydraulic switch machine is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of railway equipment technology, and in particular to a quick-connect fitting assembly for hydraulic switch machines. Background Technology

[0002] Currently, the hydraulic switch machine testing oil pipe joints used in the railway industry adopt traditional threaded locking straight-through joints, which are inconvenient to disassemble and assemble. Repeated disassembly and assembly can easily cause the joints to loosen, leak hydraulic oil, or even be damaged. In particular, when removing the oil pipe, the hydraulic oil inside the oil pipe is affected by pressure and overflows to the ground, which can easily lead to occupational safety hazards such as personnel slipping and falling. At the same time, it also causes a lot of waste.

[0003] Therefore, there is an urgent need to design a connection method with a novel structure to solve the above-mentioned important problems. Utility Model Content

[0004] The purpose of this invention is to provide a quick-connect fitting assembly for hydraulic switch machines, thereby solving the aforementioned problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A quick-connect fitting assembly for hydraulic switch machines includes a plug assembly;

[0007] The plug assembly includes: a plug housing, a conical sealing plug valve disposed in the inner cavity of the plug housing, and a spring sleeved on one end of the plug valve; a first rubber sealing ring disposed on the end of the plug valve away from the spring and sleeved on the plug valve; a first threaded interface is also provided on the end of the plug assembly away from the plug valve; and a spring limiting bushing disposed on the end of the spring away from the plug valve and abutting against the spring.

[0008] Socket assembly;

[0009] The socket assembly includes: a socket housing with a guide cone surface, a plunger-type socket valve located inside the socket housing cavity, a first valve spring and a second valve spring sleeved on the outside of the socket valve, an axially sliding valve bushing, a second rubber sealing ring located at the front end of the socket, and a locking mechanism.

[0010] Preferably, the locking mechanism includes: a locking spring, a locking buckle, and a locking ball;

[0011] The latch is embedded in the radial groove of the socket housing and can slide axially. Its outer end is provided with a manual operation ring, and its inner end contacts the latch ball to form an inclined drive structure.

[0012] The locking spring is installed in the locking cavity of the socket housing, located between the locking spring and the housing wall, and is used to apply radial clamping force to the locking spring to maintain the locked state of the locking ball;

[0013] The locking beads are distributed in the circular grooves of the lock and are pressed into the annular locking groove of the plug housing by the elastic force of the lock spring, thus achieving mechanical interlocking.

[0014] Preferably, the diameter of the first valve spring is larger than the diameter of the second valve spring.

[0015] Preferably, the spring of the socket valve forms a stepped elastic force match with the first valve spring and the second valve spring of the socket valve.

[0016] Preferably, the stiffness coefficient of the first valve spring is 8-12 N / mm;

[0017] The stiffness coefficient of the second valve spring is 15-20 N / mm.

[0018] Preferably, the locking ball is made of three equidistant tungsten carbide alloy balls, with a diameter to groove depth ratio of 1:1.2 for the plug housing, and the spring force coefficient of the locking spring is 30-35 N / mm.

[0019] Preferably, the front end of the plug housing is provided with a 15° guide cone surface, which matches the guide cone surface of the socket housing to ensure self-centering during insertion and removal.

[0020] Preferably, it also includes: the housing of the hydraulic switch machine and the oil pipes of the hydraulic testing device;

[0021] The end of the socket assembly furthest from the plug assembly is connected to the housing of the hydraulic switch machine;

[0022] The hydraulic test device's oil pipe and plug assembly are connected to the end furthest from the hydraulic switch machine's housing.

[0023] The beneficial effects of this utility model are as follows: This utility model discloses a quick-connect fitting assembly for hydraulic switch machines, including a plug assembly; the plug assembly includes: a plug housing, a conical sealing plug valve disposed in the inner cavity of the plug housing, and a spring sleeved on one end of the plug valve; a first rubber sealing ring disposed at the end of the plug valve away from the spring and sleeved on the plug valve; a first threaded interface is also provided at the end of the plug assembly away from the plug valve; a spring limiting bushing disposed at the end of the spring away from the plug valve and abutting against the spring; a socket assembly; the socket assembly includes: a socket housing with a guide cone surface, a plunger-type socket valve disposed in the inner cavity of the socket housing, a first valve spring and a second valve spring sleeved on the outside of the socket valve, an axially sliding valve bushing, a second rubber sealing ring located at the front end of the socket, and a locking mechanism. This utility model has the following effects: 1. Convenient disassembly and assembly: Compared with traditional threaded locking straight-through joints, the disassembly and assembly process is simpler and more convenient, thereby greatly improving the detection efficiency of hydraulic switch machines.

[0024] 2. No oil leakage issues:

[0025] Compared with traditional threaded locking straight connectors, due to its special internal valve body structure, hydraulic oil will not overflow or leak when the oil pipe is inserted or removed, thus avoiding waste of hydraulic oil.

[0026] 3. It will not pose a safety risk:

[0027] Since hydraulic oil will not overflow or leak when the oil pipe is inserted or removed, it will not pose a safety risk to the surrounding environment or testing personnel.

[0028] 4. Extend the service life of testing equipment:

[0029] Since the testing process does not require frequent disassembly of the hydraulic pipe joints of the testing equipment, the service life of the testing equipment is greatly extended. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view of the plug assembly of this utility model;

[0031] Figure 2 This is a cross-sectional view of the socket assembly of this utility model;

[0032] Figure 3 This is a cross-sectional view of the plug assembly and socket assembly of this utility model before they are connected.

[0033] Figure 4 This is a cross-sectional view of the plug assembly and socket assembly of this utility model after they are connected.

[0034] Figure 5 This is a perspective view of the overall structure of the plug assembly of this utility model;

[0035] Figure 6 This is a schematic diagram of the overall connection of the quick connector for the hydraulic switch machine of this utility model.

[0036] In the attached diagram: 1. First rubber sealing ring; 2. Plug valve; 3. Spring; 4. Plug housing;

[0037] 5. Spring limiting bushing; 6. First threaded interface; 7. Second threaded interface; 8. Socket housing;

[0038] 9. Socket valve; 10. First valve spring; 11. Second valve spring; 12. Locking spring;

[0039] 13. Locking buckle; 14. Valve bushing; 15. Second rubber sealing ring; 16. Locking buckle ball; 17. Switch machine housing; 18. Socket assembly; 19. Plug assembly; 20. Hydraulic test device oil pipe. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0041] Reference Figures 1 to 6 A quick-connector assembly for hydraulic switch machines is shown, including a plug assembly 19.

[0042] The plug assembly 19 includes: a plug housing 4, a conical sealing plug valve 2 disposed within the cavity of the plug housing 4, and a spring 3 sleeved on one end of the plug valve 2; a first rubber sealing ring 1 disposed at the end of the plug valve 2 away from the spring 3, and sleeved on the plug valve 2; a first threaded interface 6 is also provided at the end of the plug assembly 19 away from the plug valve 2; a spring limiting bushing 5 disposed at the end of the spring 3 away from the plug valve 2, and abutting against the spring 3. The spring 3 is engaged within the spring limiting bushing 5.

[0043] Socket assembly 18;

[0044] The socket assembly 18 includes: a socket housing 8 with a guide cone surface, a plunger-type socket valve 9 disposed in the inner cavity of the socket housing 8, a first valve spring 10 and a second valve spring 11 sleeved on the outside of the socket valve 9, an axially sliding valve bushing 14, a second rubber sealing ring 15 located at the front end of the socket, and a locking mechanism.

[0045] Preferably, the locking mechanism includes: a locking spring 12, a locking buckle 13, and a locking ball 16;

[0046] The latch 13 is embedded in the radial groove of the socket housing 8 and can slide along the axial direction. Its outer end is provided with a manual operation ring, and its inner end contacts the latch ball 16 to form an inclined drive structure.

[0047] The locking spring 12 is installed in the locking chamber 13 of the socket housing 8, located between the locking 13 and the housing wall, and is used to apply radial clamping force to the locking 13 to maintain the locked state of the locking ball 16;

[0048] The locking beads 16 are distributed in the circular grooves of the locking buckle 13. They are pressed into the annular locking groove of the plug housing 4 by the elastic force of the locking spring 12 to achieve mechanical interlocking.

[0049] In this embodiment, when the front end of the plug housing 4 contacts the valve bushing 14, the plug valve 2 and the socket valve 9 are opened synchronously by axial thrust to form a through oil passage, and bidirectional mechanical locking is achieved by the locking ball 16 being embedded in the annular groove of the plug housing 4.

[0050] Preferably, the diameter of the first valve spring 10 is larger than the diameter of the second valve spring 11. The first valve spring 10 is fitted onto the second valve spring 11.

[0051] Preferably, the spring of the socket valve 9 forms a stepped elastic force match with the first valve spring 10 and the second valve spring 11 of the socket valve 9. The first valve spring 10 is a low-stiffness spring used for initial sealing, and the second valve spring 11 is a high-stiffness spring used for high-pressure sealing.

[0052] Preferably, the stiffness coefficient of the first valve spring 10 is 8-12 N / mm;

[0053] The stiffness coefficient of the second valve spring 11 is 15-20 N / mm.

[0054] Preferably, the locking ball 16 is made of three equidistant tungsten carbide alloy balls, the ratio of the diameter to the groove depth of the plug housing 4 is 1:1.2, and the spring force coefficient of the locking spring 12 is 30-35 N / mm.

[0055] Preferably, the front end of the plug housing 4 is provided with a 15° guide cone surface, which cooperates with the guide cone surface of the socket housing 8 to ensure self-centering during insertion and removal.

[0056] Preferably, it also includes a hydraulic switch machine housing 17 and a hydraulic testing device oil pipe 20;

[0057] The end of the socket assembly 18 away from the plug assembly 19 is connected to the housing of the hydraulic switch machine; the end of the socket assembly 18 connected to the housing of the hydraulic switch machine is provided with a second threaded interface 7, and is connected by a threaded connection.

[0058] The hydraulic test device oil pipe 20 is connected to the end of the plug assembly 19 away from the hydraulic switch machine housing.

[0059] The working principle of this utility model:

[0060] like Figure 3 As shown, before the plug and socket are connected, the valve of the plug is in a locked state due to the elastic force provided by its internal spring, and the first rubber sealing ring 1 on the valve also provides a sealing function. Similarly, the valve of the socket is in a locked state due to the elastic force provided by its internal first valve spring 10 and second valve spring 11, and the second rubber sealing ring 15 on the valve also provides a sealing function.

[0061] like Figure 4The diagram shows the plug and socket after they are connected. When the plug and socket are connected, the front end of the plug housing 4 moves forward against the valve bushing 14 of the socket. At this time, the valve inside the plug begins to move backward due to the reverse thrust of the valve inside the socket, and the valve inside the plug opens. Because the valve bushing 14 inside the socket is pushed by the plug and moves relative to the valve, the valve inside the socket also opens, and the hydraulic oil circuit is opened. At the same time, the latch and latch ball 16 on the socket lock the plug to prevent the quick connector from disconnecting.

[0062] like Figure 6 As shown, the switch machine housing 17, socket assembly 18, plug assembly 19, and hydraulic testing device oil pipe 20 are included. Before testing the hydraulic switch machine, the two quick-connect socket assemblies 18 are fixed to the hydraulic switch machine oil pipe joints, and the two quick-connect plug assemblies 19 are connected to the hydraulic testing device oil pipe 20. When testing the hydraulic switch machine, the two plug assemblies 19 are connected to the two socket assemblies 18, at which point the oil circuit is connected, and testing begins. After testing, the latch on the socket is pushed down. Due to the spring force inside the plug and socket, the plug and socket quickly disconnect, the valve quickly closes, and the oil circuit is simultaneously shut off.

[0063] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0064] This utility model discloses a quick-connect fitting assembly for hydraulic switch machines, including a plug assembly 19; the plug assembly 19 includes: a plug housing 4, a conical sealing plug valve 2 disposed in the inner cavity of the plug housing 4, and a spring sleeved on one end of the plug valve 2; a first rubber sealing ring 1 disposed at the end of the plug valve 2 away from the spring, and sleeved on the plug valve 2; the end of the plug assembly 19 away from the plug valve 2 is also provided with a first threaded interface; a spring limiting bushing 5 disposed at the end of the spring away from the plug valve 2, and abutting against the spring; and a socket assembly 18; the socket assembly 18 includes: a socket housing 8 with a guide cone surface, a plunger-type socket valve 9 disposed in the inner cavity of the socket housing 8, a first valve spring 10 and a second valve spring 11 sleeved on the outside of the socket valve 9, an axially sliding valve bushing 14, a second rubber sealing ring 15 located at the front end of the socket, and a locking mechanism. This utility model has the following advantages: convenient disassembly and assembly: compared with traditional threaded locking straight-through joints, the disassembly and assembly process is simpler and more convenient, thereby greatly improving the detection efficiency of hydraulic switch machines.

[0065] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A quick-connect fitting assembly for hydraulic switch machines, characterized in that, include: Plug assembly; The plug assembly includes: a plug housing, a tapered sealing plug valve disposed in the inner cavity of the plug housing, and a spring sleeved on one end of the plug valve; A first rubber sealing ring is disposed at the end of the plug valve away from the spring and is fitted onto the plug valve; the end of the plug assembly away from the plug valve is also provided with a first threaded interface; a spring limiting bushing is disposed at the end of the spring away from the plug valve and abuts against the spring; Socket assembly; The socket assembly includes: a socket housing with a guide cone surface, a plunger-type socket valve disposed in the inner cavity of the socket housing, a first valve spring and a second valve spring sleeved on the outside of the socket valve, an axially sliding valve bushing, a second rubber sealing ring located at the front end of the socket, and a locking mechanism.

2. The quick-connect fitting assembly for hydraulic switch machines according to claim 1, characterized in that, The locking mechanism includes: a locking spring, a locking buckle, and a locking ball; The latch is embedded in the radial groove of the socket housing and can slide along the axial direction. Its outer end is provided with a manual operation ring, and its inner end contacts the latch ball to form an inclined driving structure. The locking spring is installed in the locking cavity of the socket housing, located between the locking spring and the housing wall, and is used to apply radial clamping force to the locking spring to maintain the locking state of the locking ball; The locking beads are distributed in the circular groove of the lock and are pressed into the annular locking groove of the plug housing by the elastic force of the locking spring, thereby achieving mechanical interlocking.

3. The quick-connect fitting assembly for hydraulic switch machines according to claim 1, characterized in that, The diameter of the first valve spring is larger than the diameter of the second valve spring.

4. The quick-connect fitting assembly for hydraulic switch machines according to claim 1, characterized in that, The spring of the socket valve forms a stepped elastic force match with the first valve spring and the second valve spring of the socket valve.

5. The quick-connect fitting assembly for hydraulic switch machines according to claim 4, characterized in that, The stiffness coefficient of the first valve spring is 8-12 N / mm; The stiffness coefficient of the second valve spring is 15-20 N / mm.

6. The quick-connect fitting assembly for hydraulic switch machines according to claim 2, characterized in that, The locking ball is composed of three equidistant tungsten carbide alloy balls, with a diameter-to-groove ratio of 1:1.

2. The spring force coefficient of the locking spring is 30-35 N / mm.

7. The quick-connect fitting assembly for hydraulic switch machines according to claim 2, characterized in that, The front end of the plug housing is provided with a 15° guide cone surface, which cooperates with the guide cone surface of the socket housing to ensure self-centering during insertion and removal.

8. The quick-connect fitting assembly for hydraulic switch machines according to claim 1, characterized in that, Also includes: Hydraulic switch machine housing and hydraulic testing device oil pipes; The end of the socket assembly away from the plug assembly is connected to the housing of the hydraulic switch machine; The hydraulic test device's oil pipe is connected to the end of the plug assembly furthest from the hydraulic switch machine's housing.

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