A hydraulic control valve leakage detection mechanism

Abstract

The utility model relates to hydraulic element detection technical field discloses a kind of hydraulic control valve leakage detection mechanism.The mechanism includes support table, tester, oil tank, connecting pipe mechanism and protective shell mechanism.Connecting pipe mechanism utilizes the sliding shell of being sleeved in fixed shell outside, drive card pearl is embedded in the clamping groove of joint outer wall under the action of first spring, the quick locking of pipeline is realized;Protective shell mechanism is set to support table top, and the opening clamping block of visual cover bottom is cooperated with the clamping jaw of being abutted by second spring in support table, realize the automatic clamping when protective cover closure, and can be unlocked by external button;While support table top is fixedly provided with the liquid baffle of being surrounded in the periphery of control valve body.The utility model solves the problem that existing device pipeline connection is complicated and lacks effective protection, has the advantages that pipeline butt joint efficiency is high, protection operation is convenient and can effectively block waste liquid leakage diffusion.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic component testing technology, and in particular to a hydraulic control valve leakage detection mechanism. Background Technology

[0002] As the core of hydraulic system control, the sealing performance of hydraulic control valves directly determines the working efficiency and safety of the entire hydraulic system. Therefore, strict leakage detection of control valves is an indispensable and important step in the manufacturing, maintenance and repair process.

[0003] In existing testing procedures, connecting the valve to be tested to the test circuit typically requires the use of connecting pipes. However, most testing devices still use traditional threaded connectors to tighten and secure the pipes. While this connection method is simple in structure, when faced with batch testing tasks, operators need to repeatedly tighten and loosen each valve. This not only consumes a great deal of manpower and time, severely restricting the overall efficiency of the testing operation, but also the threaded structure is prone to wear under frequent disassembly and assembly, thus affecting the reliability of the connection.

[0004] Furthermore, leak detection often involves working in high-pressure fluid environments. Existing simple detection platforms typically lack comprehensive and easy-to-operate protective measures. During testing, if an accidental leak occurs in the valve body or interface, high-pressure oil can easily spray everywhere. This not only poses a threat to the personal safety of on-site operators, but also, due to the lack of effective waste liquid containment and restriction structures, the leaked oil will contaminate the work surface and surrounding environment, increasing the difficulty of subsequent cleanup.

[0005] Therefore, this utility model proposes a hydraulic control valve leakage detection mechanism to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a hydraulic control valve leakage detection mechanism, which aims to improve the problems of cumbersome pipeline connection and disassembly and low efficiency in existing hydraulic valve detection technology, as well as the lack of effective safety sealing and waste liquid blocking structures during high-pressure leakage testing, which can easily lead to safety accidents or environmental pollution.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic control valve leakage detection mechanism, comprising: a support table, a tester fixedly installed on the top of the support table, and an oil tank placed at the bottom of the support table; as well as a connecting pipe mechanism and a protective shell mechanism.

[0008] The connecting pipe mechanism is disposed on the support table and is used to connect the control valve body, and the protective shell mechanism is disposed on the top of the support table.

[0009] Furthermore, the connecting pipe mechanism includes a fixed shell, a sliding shell, a first spring, a connector, and a retaining bead. The fixed shell is fixedly connected to the end of the pipe. A through hole is radially opened on the side wall of the fixed shell. The retaining bead is slidably connected in the through hole. The sliding shell is slidably sleeved on the outer wall of the fixed shell. The first spring abuts against the sliding shell and the fixed shell. An unlocking groove for accommodating the retaining bead is opened on the inner wall of the sliding shell. A retaining groove adapted to the retaining bead is opened on the outer wall of the connector. The sliding shell pushes the retaining bead into the retaining groove under the action of the first spring. The protective shell mechanism includes a viewing cover, a hinge, an opening retaining block, a retaining claw, and a second spring. The viewing cover is rotatably connected to the top of the support table through the hinge. The opening retaining block is fixedly connected to the side of the viewing cover away from the hinge. The retaining claw is slidably installed inside the support table. The second spring abuts against the retaining claw and the inner wall of the support table. The end of the retaining claw is engaged in the groove opened in the opening retaining block.

[0010] Preferably, the side wall of the support table has a through hole, and a button is fixedly connected to the end of the claw away from the opening block. The button slides through the through hole in the side wall of the support table and extends to the outside of the support table.

[0011] Preferably, a limiting plate is fixedly connected to one end of the button located outside the support table, and the cross-sectional dimension of the limiting plate is larger than the diameter of the through hole in the side wall of the support table.

[0012] Preferably, the first spring is sleeved on the outside of the fixed shell, one end of the first spring abuts against the shoulder of the inner wall of the sliding shell, and the other end of the first spring abuts against the stop portion of the outer wall of the fixed shell.

[0013] Preferably, when the sliding shell slides along the axial direction of the fixed shell to the unlocking position, the unlocking groove on the inner wall of the sliding shell moves to the same horizontal position as the locking bead, and the locking bead can move outward along the through hole of the fixed shell and disengage from the locking groove.

[0014] Preferably, a liquid-blocking strip is fixedly connected to the top of the support table. The liquid-blocking strip is arranged in a closed or semi-closed shape, and the liquid-blocking strip is located outside the edge of the area covered by the visible cover.

[0015] Preferably, the end of the claw facing the open block is provided with a guide slope, and the bottom end of the open block is provided with a pressing slope that cooperates with the guide slope.

[0016] Preferably, the end of the connector away from the fixed housing is provided with a connection port for connecting to the control valve body, and the connecting pipe mechanism is connected to the tester and the oil tank respectively through pipes.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting a connecting pipe mechanism, utilizes the sliding shell to drive the locking ball to embed into the locking groove on the outer wall of the connector under the action of the spring, realizing the ball-lock type quick connection of the pipeline. It solves the problems of cumbersome disassembly and assembly, long time consumption and low efficiency caused by the use of threaded connections in existing hydraulic testing pipelines. It achieves the technical effect of quickly completing pipeline docking and separation, significantly improving the efficiency of testing operations and ensuring a stable and reliable connection.

[0018] 2. This utility model, by setting up a protective shell mechanism, utilizes the cooperation between the opening block at the bottom of the visible cover and the claw inside the support table that is abutted by a spring to achieve automatic locking when the protective cover is closed and convenient unlocking via an external button. This solves the problem that existing testing devices lack effective protection or have complex protective structures during high-pressure testing. It achieves the goal of effectively isolating high-pressure liquid splashes and ensuring the safety of operators while taking into account the convenience of operation and the visual monitoring of the internal status. Attached Figure Description

[0019] Figure 1 This is a perspective view of a hydraulic control valve leakage detection mechanism proposed in this utility model; Figure 2 This is a schematic diagram of the hinge of a hydraulic control valve leakage detection mechanism proposed in this utility model; Figure 3 This is a cross-sectional schematic diagram of the opening block of a hydraulic control valve leakage detection mechanism proposed in this utility model. Figure 4 An exploded view of the connector of a hydraulic control valve leakage detection mechanism proposed in this utility model; Figure 5 This is a cross-sectional schematic diagram of the fixed shell of a hydraulic control valve leakage detection mechanism proposed in this utility model.

[0020] Legend: 1. Support table; 2. Oil tank; 3. Tester; 4. Connecting pipe mechanism; 401. Sliding shell; 402. First spring; 403. Connector; 404. Fixed shell; 405. Clamping ball; 406. Clamping groove; 5. Control valve body; 6. Protective shell mechanism; 601. Visible cover; 602. Hinge; 603. Opening block; 604. Button; 605. Claw; 606. Second spring; 607. Limiting plate; 608. Liquid baffle. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-5 This utility model provides an embodiment of a hydraulic control valve leakage detection mechanism, which includes a support table 1 serving as an integral mounting base and operating platform, a tester 3 fixedly installed on one side of the top of the support table 1 for providing detection signals and pressure sources, and an oil tank 2 placed at the bottom of the support table 1 for storing hydraulic media. The control valve body 5 to be tested is placed on the top surface of the support table 1 in the working state. In order to achieve rapid construction of the fluid circuit and safe isolation of the test area, the detection mechanism also includes a connecting pipe mechanism 4 for connecting the control valve body 5 with the tester 3 and the oil tank 2, and a protective shell mechanism 6 set on the top of the support table 1 for covering the test area.

[0023] The support table 1 serves as the basic load-bearing component, and a liquid baffle 608 is fixedly connected to its top plane. The liquid baffle 608 is arranged in a closed or semi-closed rectangle or other geometric shape, and is located on the outer periphery of the area where the control valve body 5 is placed. It is used to limit the overflowing liquid within a specific range to prevent it from flowing to the ground when a leak occurs during testing. The connecting pipe mechanism 4 connects the hydraulic components by passing through the support table 1 or arranging along the edge of the support table 1 through the pipes.

[0024] The connecting pipe mechanism 4 includes a fixed shell 404, a sliding shell 401, a first spring 402, a connector 403, and a retaining bead 405. The fixed shell 404 is fixedly connected to the end of the pipe connected to the testing instrument 3 or the oil tank 2. The fixed shell 404 has a hollow cylindrical structure. A through hole is radially opened on the side wall of the fixed shell 404. The retaining bead 405 is slidably installed inside the through hole, and the diameter of the retaining bead 405 is larger than the wall thickness of the through hole, so that the retaining bead 405 can partially protrude into the inner cavity of the fixed shell 404. The sliding shell 401 is slidably sleeved on the outer circumferential wall of the fixed shell 404 and can reciprocate along the axial direction of the fixed shell 404. The first spring 402 is sleeved on the outside of the fixed shell 404, and one end of the first spring 402 is... The first spring 402 abuts against the shoulder below the inner wall of the sliding shell 401, and the other end abuts against the stop or step surface below the outer wall of the fixed shell 404, thereby providing a restoring elastic force for the sliding shell 401. An annular unlocking groove is provided on the inner circumferential wall of the sliding shell 401. The inner diameter of the unlocking groove is larger than the outer diameter of the fixed shell 404 to accommodate the locking ball 405 that has exited the locking state. One end of the connector 403 is used to connect to the interface of the control valve body 5, and the other end of the connector 403 is inserted into the interior of the fixed shell 404. An annular groove 406 that matches the shape of the locking ball 405 is provided on the outer circumferential wall of the connector 403. The locking and releasing of the connector 403 is achieved by the insertion and release of the locking ball 405 in the groove 406.

[0025] The protective shell mechanism 6, as another core component, provides visible security protection. The protective shell mechanism 6 includes a transparent viewing cover 601, a hinge 602, an opening latch 603, a claw 605, and a second spring 606. The viewing cover 601 is rotatably connected to the top edge of the support table 1 via the hinge 602, allowing the viewing cover 601 to flip open or close relative to the support table 1. The opening latch 603 is fixedly connected to the bottom edge of the viewing cover 601 on the side away from the hinge 602, and a locking groove is provided on the side of the opening latch 603. The interior of the support table 1 is provided with a accommodating... The pawl 605 is slidably installed in the internal cavity of the support table 1 and can move horizontally. The second spring 606 is installed inside the support table 1. One end of the second spring 606 abuts against the inner wall of the support table 1, and the other end of the second spring 606 abuts against the pawl 605. The elastic force of the second spring 606 pushes the end of the pawl 605 to always maintain the tendency to move towards the locking position. When the visible cover 601 is closed, the opening block 603 is inserted into the inside of the support table 1. Under the action of the second spring 606, the pawl 605 is locked into the groove of the opening block 603 to achieve automatic locking and fixation. In the connecting pipe mechanism 4, the fixed shell 404 serves as the main connecting carrier. Its outer wall is provided with a stop or a protruding ring structure along the axial direction. The bottom of the inner wall of the sliding shell 401 has an inwardly extending shoulder. The first spring 402 is compressed and disposed between the stop on the outer wall of the fixed shell 404 and the shoulder on the inner wall of the sliding shell 401, thereby always applying a preload force to the sliding shell 401 to move it away from the pipe connection end. When the sliding shell 401 is in a naturally locked state under the action of the first spring 402, the inner circumferential wall of the sliding shell 401 will squeeze the retaining bead 405 located in the through hole of the fixed shell 404 in the inward direction, forcing a part of the sphere of the retaining bead 405 to protrude from the inner wall surface of the fixed shell 404.

[0026] During the insertion of the connector 403 into the fixed housing 404, the annular groove 406 on the outer wall of the connector 403 moves to the axial position corresponding to the retaining bead 405. At this time, the retaining bead 405, which is pressed by the sliding housing 401, is embedded in the groove 406, thereby preventing the connector 403 from detaching from the fixed housing 404 axially and achieving the locking and fixing of the pipeline. When it is necessary to disconnect the connection, the operator manually overcomes the elastic force of the first spring 402 and slides the sliding housing 401 downward to the unlocking position. At this time, the unlocking groove with a larger diameter preset on the inner wall of the sliding housing 401 moves to the same horizontal position as the retaining bead 405. The retaining bead 405 loses the radial constraint of the inner wall of the sliding housing 401 and can move outward and enter the unlocking groove space, thereby releasing the restriction on the groove 406 and allowing the connector 403 to be pulled out of the fixed housing 404.

[0027] Meanwhile, the locking and unlocking structure of the protective shell mechanism 6 is designed on the side wall and inside of the support table 1. The side wall of the support table 1 is provided with a through hole for unlocking operation. A long rod-shaped button 604 is fixedly connected to the side of the claw 605 away from the locking end. The button 604 slides through the through hole in the side wall of the support table 1 and extends to the outside of the support table 1. In order to prevent the button 604 from completely detaching from the support table 1 or retracting into the interior, a limiting plate 607 with a size larger than the diameter of the through hole is fixedly connected to the end of the button 604 located outside the support table 1. The limiting plate 607 serves as the contact surface for pressing operation and also plays the role of limiting the stroke.

[0028] During the protective operation, when the visible cover 601 rotates and closes around the hinge 602, the pressing slope at the bottom of the opening block 603 contacts and pushes open the claw 605 with the corresponding guide slope, overcoming the resistance of the second spring 606 and forcing the claw 605 to retract. After the opening block 603 is fully in place, the claw 605 pops forward under the restoring force of the second spring 606 and locks into the groove on the side of the opening block 603 to complete automatic locking. When the test is over and it needs to be opened, the button 604 and the claw 605 are moved backward together by pressing the external limit plate 607, so that the claw 605 disengages from the groove of the opening block 603 and releases the locking restriction on the visible cover 601. As a preferred embodiment, in order to prevent accidental hydraulic oil spraying or minor leakage from contaminating the working environment during the test, the baffle strip 608 on the top of the support table 1 surrounds the control valve body 5 to form a closed or semi-closed liquid collection area. The height of the baffle strip 608 is set so as to effectively block the flowing liquid, and the position of the baffle strip 608 is located outside the edge of the area covered by the visible cover 601. That is, the area enclosed by the baffle strip 608 is larger than the projected area of ​​the visible cover 601, ensuring that even if the liquid splashes onto the inner wall of the visible cover 601 and flows down, it is still confined within the range of the baffle strip 608.

[0029] As another preferred embodiment, in order to make the closing process of the protective shell mechanism 6 smoother and reduce mechanical wear, the end of the claw 605 facing the opening block 603 is machined into a guide slope with an inclined angle. At the same time, the bottom end of the opening block 603 is also provided with a pressing slope that cooperates with the guide slope. Through the cooperation of these two slopes, when the visible cover 601 is pressed down, the vertical pressure can be smoothly converted into a thrust that pushes the claw 605 to move backward horizontally, so as to realize the function of automatically pushing the claw 605 open and locking without pressing the button 604.

[0030] As another preferred embodiment, in order to facilitate the connection between the connecting pipe mechanism 4 and external equipment, the end of the connector 403 away from the fixed housing 404 is machined with a standard threaded interface or flange interface as a connection port for tight connection with the oil inlet and outlet ports of the control valve body 5. At the same time, the tail end of the fixed housing 404 is connected to the pressure output end of the tester 3 and the oil return end of the oil tank 2 through a high-pressure resistant hose or hard pipe, respectively, to construct a complete hydraulic test circuit.

[0031] As another preferred embodiment, in order to ensure the reliability and stability of the connecting pipe mechanism 4 in long-term use, the first spring 402 is a high-strength stainless steel compression spring, and the outer diameter of the first spring 402 is slightly smaller than the inner diameter of the sliding shell 401, so as to ensure that the first spring 402 does not bend or get stuck when it extends and retracts in the annular gap between the sliding shell 401 and the fixed shell 404. The unlocking groove on the inner wall of the sliding shell 401 is designed as a groove structure with smooth transition rounded corners to reduce the frictional resistance when the locking ball 405 enters and exits the groove.

[0032] As another preferred embodiment, in order to improve the comfort and recognizability of operation, the limiting plate 607 is designed as a large-area flat plate structure in the shape of a disc or square, and the surface of the limiting plate 607 can be provided with anti-slip texture. The size of the limiting plate 607 is significantly larger than the diameter of the through hole in the side wall of the support table 1, which serves as a mechanical limit to prevent the button 604 from retracting into the interior, and also provides the operator with a wide pressing force surface.

[0033] Working principle: Before the test, the control valve body 5 to be tested is placed in the predetermined area on the top of the support table 1. Then, a hydraulic circuit is established using the connecting pipe mechanism 4. The operator first slides the sliding shell 401, which is sleeved on the outside of the fixed shell 404, downward to overcome the elastic force of the first spring 402 and make the sliding shell 401 move axially. When the sliding shell 401 moves to the unlocking position, the unlocking groove opened on its inner wall is at the same level as the retaining ball 405 installed in the through hole of the fixed shell 404. At this time, the retaining ball 405 is released from the radial limit and can move in the outer diameter direction.

[0034] Next, the connector 403 connected to the control valve body 5 pipe is inserted into the fixed shell 404 until the groove 406 on the outer wall of the connector 403 is aligned with the position of the retaining bead 405. The sliding shell 401 is then released, and the first spring 402 releases the accumulated elastic potential energy to push the sliding shell 401 back to its initial state. During the reset process, the inner wall of the sliding shell 401 presses the retaining bead 405 again, forcing the retaining bead 405 to move inward and tightly embed itself in the groove 406 of the connector 403, thereby completing the rapid locking and sealing connection of the pipeline.

[0035] After the pipeline connection is completed, rotate the visible cover 601 installed on the top of the support table 1 via the hinge 602 to cover the test area. When the opening block 603 at the bottom of the visible cover 601 is inserted into the support table 1, the pressing slope at the bottom of the opening block 603 contacts and pushes the guide slope at the end of the claw 605, forcing the claw 605 to overcome the resistance of the second spring 606 and move backward. After the opening block 603 is fully in place, the claw 605 pops forward under the restoring force of the second spring 606 and locks into the groove on the side of the opening block 603, realizing the automatic locking of the protective shell mechanism 6. At this time, the tester 3 is started, and the medium in the oil tank 2 enters the control valve body 5 through the pipeline for testing. If a leak occurs, the liquid baffle 608 restricts the liquid to a specific range on the table, and the visible cover 601 blocks splashing liquid to protect personnel safety.

[0036] After the test, press the limiting plate 607 on the outside of the support table 1 inward, and move the claw 605 backward by pressing the button 604, so that the claw 605 disengages from the groove of the opening block 603, releases the lock on the viewing cover 601 and opens it. Then slide the sliding shell 401 downward again to make the ball 405 enter the unlocking slot, and pull out the connector 403 to complete the disassembly.

Claims

1. A hydraulic control valve leakage detection mechanism, comprising: Support table (1), tester (3) fixedly installed on top of support table (1) and oil tank (2) placed at the bottom of support table (1); Connecting pipe mechanism (4), the connecting pipe mechanism (4) is set on the support table (1) and is used to connect the control valve body (5); And a protective shell mechanism (6), which is located on top of the support table (1); The connecting pipe mechanism (4) is characterized in that it includes a fixed shell (404), a sliding shell (401), a first spring (402), a connector (403), and a retaining bead (405). The fixed shell (404) is fixedly connected to the end of the pipe. A through hole is provided radially on the side wall of the fixed shell (404). The retaining bead (405) is slidably connected in the through hole. The sliding shell (401) is slidably sleeved on the outer wall of the fixed shell (404). The first spring (402) abuts against the sliding shell (401) and the fixed shell (404). An unlocking groove for accommodating the retaining bead (405) is provided on the inner wall of the sliding shell (401). A retaining groove (406) adapted to the retaining bead (405) is provided on the outer wall of the connector (403). Under the action of the first spring (402), the sliding shell (401) pushes the retaining bead (405) into the retaining groove (406). The protective shell mechanism (6) includes a viewing cover (601), a hinge (602), an opening block (603), a claw (605), and a second spring (606). The viewing cover (601) is rotatably connected to the top of the support table (1) via the hinge (602). The opening block (603) is fixedly connected to the side of the viewing cover (601) away from the hinge (602). The claw (605) is slidably installed inside the support table (1). The second spring (606) abuts against the claw (605) and the inner wall of the support table (1). The end of the claw (605) is inserted into the groove opened by the opening block (603).

2. The hydraulic control valve leakage detection mechanism according to claim 1, characterized in that, The side wall of the support table (1) has a through hole. The end of the claw (605) away from the opening block (603) is fixedly connected to a button (604). The button (604) slides through the through hole in the side wall of the support table (1) and extends to the outside of the support table (1).

3. The hydraulic control valve leakage detection mechanism according to claim 2, characterized in that, The button (604) is fixedly connected to a limiting plate (607) at one end outside the support table (1). The cross-sectional dimension of the limiting plate (607) is larger than the diameter of the through hole in the side wall of the support table (1).

4. The hydraulic control valve leakage detection mechanism according to claim 1, characterized in that, The first spring (402) is sleeved on the outside of the fixed shell (404). One end of the first spring (402) abuts against the shoulder of the inner wall of the sliding shell (401), and the other end of the first spring (402) abuts against the stop part of the outer wall of the fixed shell (404).

5. A hydraulic control valve leakage detection mechanism according to claim 1, characterized in that, When the sliding shell (401) slides along the fixed shell (404) to the unlock position, the unlocking groove on the inner wall of the sliding shell (401) moves to the same horizontal position as the locking ball (405), and the locking ball (405) can move outward along the through hole of the fixed shell (404) and disengage from the locking groove (406).

6. The hydraulic control valve leakage detection mechanism according to claim 1, characterized in that, A liquid-blocking strip (608) is fixedly connected to the top of the support table (1). The liquid-blocking strip (608) is arranged in a closed or semi-closed shape, and the liquid-blocking strip (608) is located outside the edge of the area covered by the visible cover (601).

7. A hydraulic control valve leakage detection mechanism according to claim 1, characterized in that, The claw (605) has a guide slope at one end facing the open block (603), and the bottom end of the open block (603) has a pressing slope that cooperates with the guide slope.

8. The hydraulic control valve leakage detection mechanism according to claim 1, characterized in that, The end of the connector (403) away from the fixed shell (404) is provided with a connection port for connecting to the control valve body (5), and the connecting pipe mechanism (4) is connected to the tester (3) and the oil tank (2) through pipes respectively.

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