Air tightness detection tool for oil way of lower cover of main valve of active lubrication valve

Abstract

The invention provides an active lubrication valve main valve lower cover oil path air tightness detection tool comprising a tool main body used for placing a workpiece, and the tool main body is used for cooperating with a mounting surface of the workpiece; the fixing part is used for fixing the workpiece on the tool main body; an air tightness detection unit for detecting the air tightness of the workpiece by the air tightness detection unit when each passage of the workpiece forms a sealed chamber; wherein the workpiece is the main valve lower cover of the active lubrication valve. Through the tool, the stable state of the workpiece in the air tightness detection test process can be ensured, the interference of external factors is eliminated, and the reliability is improved. After the workpiece is installed, the airtightness of the workpiece is detected through the airtightness detection part, so that whether the airtightness of the workpiece is qualified or not is determined, whether the workpiece is suitable for storing silicone oil needed by the active lubrication valve or not is further determined, the quality of the active lubrication valve can be improved, the airtightness detection test accuracy is high, and the detection efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of valve body air tightness detection, and in particular to an air tightness detection tool for an oil circuit of a lower cover of a main valve of an active lubrication valve. Background Art

[0002] In the related technology, the active lubrication valve is an important component in the braking device of railway freight cars. Compared with the original valve, the active lubrication valve adds an oil chamber and an oil circuit in the main piston rod. During the action of the brake valve, the lubricating oil in the oil chamber continuously supplies oil to the sliding surface of the control valve and the slide valve through the oil circuit, reducing damage to the working surface and improving the stability of the cooperation between the slide valve and the control valve. The main valve lower cover of the active lubrication valve is a key part used to store the silicone oil required for the active lubrication valve. In order to ensure that the oil chamber and oil circuit in the lower cover are unobstructed and there is no leakage, the lower cover of the active lubrication valve must be tested for air tightness, but there is currently no tooling for testing the oil circuit air tightness of the main valve lower cover of the active lubrication valve. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, according to an embodiment of the present disclosure, a tool for detecting the air tightness of the oil circuit of the lower cover of the main valve of an active lubrication valve is proposed, comprising:

[0005] A tooling body, used for placing a workpiece, the tooling body being used to match the mounting surface of the workpiece;

[0006] A fixing part, used for fixing the workpiece to the tooling body;

[0007] an airtightness detection unit for detecting the airtightness of the workpiece when each passage of the workpiece forms a sealed chamber;

[0008] Among them, the above-mentioned workpiece is the lower cover of the main valve of the active lubrication valve.

[0009] In a feasible implementation manner, the tool body includes:

[0010] Frame;

[0011] A workbench, installed on the top of the frame;

[0012] A seat body is arranged on the workbench, the seat body is used to install the workpiece, and the shape of the seat body is used to match the installation surface of the workpiece.

[0013] In a feasible implementation, it also includes:

[0014] The sealing ring is arranged on the seat body and is used to form sealed chambers for each passage of the workpiece.

[0015] In a feasible implementation manner, the airtightness detection unit includes:

[0016] An air charging pipeline, wherein the portion of the seat body located within the sealing ring is provided with an air outlet, one end of the air charging pipeline is used to be connected to an air source, and the other end is connected to the air outlet;

[0017] A pressure detection member, used to detect the internal pressure of the above chamber;

[0018] Air charging switch, used to control the opening or closing of the air source;

[0019] Among them, the above-mentioned air tightness detection part conveys airflow into the above-mentioned chamber through the above-mentioned air filling pipe, so that the pressure in the above-mentioned chamber reaches a preset pressure value and maintains the pressure, and then compares the real-time pressure value detected by the above-mentioned pressure detection component with the above-mentioned preset pressure value. When the above-mentioned real-time pressure value is less than the above-mentioned preset pressure value, it is determined that the above-mentioned chamber is leaking.

[0020] In a feasible implementation manner, the preset pressure value ranges from 650 KPa to 700 KPa.

[0021] In a feasible implementation, it also includes:

[0022] The rust-proof leak detection agent is used to apply to the screw plug of the above-mentioned workpiece after the pressure in the above-mentioned chamber reaches the above-mentioned preset pressure value and is maintained, and in the case of bubbles existing in the above-mentioned screw plug, determine whether there is leakage on the outer surface of the above-mentioned screw plug and / or the surrounding side of the above-mentioned screw plug.

[0023] In a feasible implementation manner, the fixing portion includes:

[0024] A positioning pin is provided on the seat body and is used to cooperate with the bolt hole of the workpiece to position the workpiece on the seat body;

[0025] The pressing claw is used to fix the workpiece to the seat after the workpiece is positioned.

[0026] In a feasible implementation manner, the fixing portion further includes:

[0027] The driving member is used for driving the pressing claw to press or release the workpiece.

[0028] In a feasible implementation manner, the driving member includes:

[0029] A cylinder is disposed in the placement space inside the frame, and an output end of the cylinder extends out of the frame;

[0030] A first pin body and a second pin body, the pressure claw comprises a clamping section and a connecting section, wherein the clamping section is rotatably connected to the connecting section via the first pin body, and the connecting section is rotatably connected to the output end of the cylinder via the second pin body.

[0031] In a feasible implementation manner, the fixing portion further includes:

[0032] The rubber sleeve is sleeved on one end of the pressing claw and is used for pressing the workpiece.

[0033] Compared with the prior art, the present disclosure includes at least the following beneficial effects: the air tightness detection tool for the oil circuit of the lower cover of the main valve of the active lubrication valve provided in the embodiment of the present disclosure is provided with a tool body, a fixing part and an air tightness detection part. Among them, the workpiece can be placed through the tool body, and the workpiece is the lower cover of the main valve of the active lubrication valve. The end face of the tool body used to install the workpiece can be completely matched with the installation surface of the workpiece to reduce the gap between the workpiece and the tool body. The workpiece is fixed to the tool body by the fixing part, and the fixing part presses the workpiece to keep the workpiece in the assembly position at the tool body, and each passage of the workpiece forms a sealed chamber, so that the workpiece meets the air tightness detection conditions through the cooperation of the fixing part and the tool body, so as to ensure that the workpiece is in a stable state during the air tightness detection test, eliminate interference from external factors, such as the loosening of the workpiece or the tool body, which causes a gap between the workpiece and the tool body to cause leakage, etc., affecting the accuracy of the test results, and improving reliability. After the installation of the workpiece is completed, the air tightness of the workpiece is tested by the air tightness detection unit to determine whether the air tightness of the workpiece is qualified, and then determine whether the workpiece is suitable for storing the silicone oil required by the active lubrication valve, which is beneficial to improving the quality of the active lubrication valve. The air tightness detection test has high accuracy and high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0035] Figure 1 A schematic structural diagram of an angle of an oil circuit air tightness detection tool for an active lubrication valve main valve lower cover according to an embodiment of the present disclosure;

[0036] Figure 2 A schematic structural diagram from another angle of an active lubrication valve main valve lower cover oil circuit air tightness detection tooling provided in an embodiment of the present invention.

[0037] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0038] 100 active lubrication valve main valve lower cover oil circuit air tightness detection tool, 110 tool body, 111 frame, 112 workbench, 113 seat body, 120 fixing part, 121 positioning pin, 122 pressure claw, 1221 connecting section, 1222 clamping section, 123 driving part, 1231 cylinder, 1232 first pin body, 1233 second pin body, 130 pressure detection part, 140 sealing ring, 200 workpiece. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] like Figure 1 and Figure 2 As shown, according to the embodiment of the present disclosure, a tool 100 for testing the air tightness of the oil circuit of the lower cover of the main valve of an active lubrication valve is proposed, comprising: a tool body 110, for placing a workpiece 200, the tool body 110 is used to cooperate with the mounting surface of the workpiece 200; a fixing part 120, for fixing the workpiece 200 to the tool body 110; an air tightness testing part, when each passage of the workpiece 200 forms a sealed chamber, the air tightness of the workpiece 200 is tested by the air tightness testing part; wherein the workpiece 200 is the lower cover of the main valve of an active lubrication valve.

[0041] The active lubrication valve main valve lower cover oil circuit air tightness detection tool 100 provided in the embodiment of the present disclosure is provided with a tool body 110, a fixing part 120 and an air tightness detection part. Among them, the workpiece 200 can be placed through the tool body 110, and the workpiece 200 is the active lubrication valve main valve lower cover. The end surface of the tool body 110 for mounting the workpiece 200 can be completely matched with the mounting surface of the workpiece 200 to reduce the gap between the workpiece 200 and the tool body 110. The workpiece 200 is fixed to the tooling body 110 by the fixing part 120. The fixing part 120 presses the workpiece 200 to keep the workpiece 200 in the assembly position at the tooling body 110, and the passages of the workpiece 200 form a sealed chamber, so that the workpiece 200 meets the air tightness detection conditions through the cooperation of the fixing part 120 and the tooling body 110, so as to ensure that the workpiece 200 is in a stable state during the air tightness detection test, and eliminate the interference of external factors, such as the looseness of the workpiece 200 or the tooling body 110, so that the gap between the workpiece 200 and the tooling body 110 causes leakage, etc., which affects the accuracy of the test results and improves reliability. After the installation of the workpiece 200 is completed, the air tightness of the workpiece 200 is detected by the air tightness detection part, so as to determine whether the air tightness of the workpiece 200 is qualified, and then determine whether the workpiece 200 is suitable for storing the silicone oil required by the active lubrication valve, which is conducive to improving the quality of the active lubrication valve, and the air tightness detection test has high accuracy and high detection efficiency.

[0042] In some examples, such as Figure 1 and Figure 2 As shown, the tooling body 110 includes: a frame 111; a workbench 112, installed on the top of the frame 111; a base 113, arranged on the workbench 112, the base 113 is used to install the workpiece 200, and the shape of the base 113 is used to match the installation surface of the workpiece 200.

[0043] It is understandable that the tooling body 110 may be provided with a frame 111, a workbench 112 and a base 113. Among them, the frame 111 may be used as a supporting body for supporting the workbench 112. The workbench 112 is installed at the top of the frame 111. The structures and equipment that need to be used, such as the fixing part 120, may be placed on the workbench 112 for ease of use and improved efficiency. The base 113 is arranged on the table surface of the workbench 112. The shape of the mounting surface of the base 113 is consistent with the shape of the mounting surface of the workpiece 200, so that the workpiece 200 can be stably clamped on the base 113, thereby realizing the preliminary positioning of the workpiece 200, and the fit between the base 113 and the workpiece 200 can reduce the gap between the base 113 and the workpiece 200, eliminate the influence of the installation problem on the airtightness detection of the workpiece 200, and improve reliability.

[0044] Exemplarily, a mounting groove is provided on the seat body 113 , and the mounting surface of the workpiece 200 can be assembled in the mounting groove, so that the workpiece 200 is limited by the mounting groove.

[0045] In some examples, such as Figure 1 and Figure 2 As shown, the above-mentioned active lubrication valve main valve lower cover oil circuit air tightness detection tool 100 also includes: a sealing ring 140, which is arranged at the above-mentioned seat body 113 and is used to form each passage of the above-mentioned workpiece 200 into a sealed chamber.

[0046] It is understandable that the active lubrication valve main valve lower cover oil circuit air tightness detection tool 100 may also be provided with a sealing ring 140, which may be provided at the mounting surface of the seat body 113. When the workpiece 200 is installed, all passages of the workpiece 200 are included by the sealing ring 140 to ensure the sealing effect of each passage of the workpiece 200 and form a sealed chamber. In this way, when the workpiece 200 is installed on the seat body 113, since the shapes of the mounting surfaces of the seat body 113 and the workpiece 200 match, the seat body 113 can limit the degree of freedom of the workpiece 200 and reduce the gap between the workpiece 200 and the seat body 113. The sealing of the workpiece 200 can be further achieved by the sealing ring 140, thereby improving reliability.

[0047] It should be noted that a groove may be provided on the end surface of the seat body 113 facing the workpiece 200, and the sealing ring 140 may be disposed in the groove to limit the freedom of the sealing ring 140 through the groove to avoid movement of the sealing ring 140 and ensure the stability of the seal.

[0048] In some examples, such as Figure 1 and Figure 2 As shown, the air tightness detection unit includes: an air charging pipeline, the part of the seat body 113 located in the sealing ring 140 is provided with an air outlet, one end of the air charging pipeline is used to be connected to the air source, and the other end is connected to the air outlet; a pressure detection component 130, used to detect the internal pressure of the above-mentioned chamber; an air charging switch, used to control the opening or closing of the air source; wherein, the air tightness detection unit conveys airflow into the above-mentioned chamber through the air charging pipeline, so that the pressure in the above-mentioned chamber reaches a preset pressure value and maintains the pressure, and then compares the real-time pressure value detected by the pressure detection component 130 with the preset pressure value, and when the real-time pressure value is less than the preset pressure value, it is determined that the above-mentioned chamber is leaking.

[0049] It is understandable that the air tightness detection part can also be provided with an air filling pipeline, a pressure detection part 130 and an air filling switch. Among them, the seat body 113 is located inside the ring of the sealing ring 140 and is separately provided with an air outlet. One end of the air filling pipeline is connected to the air source, and the other end of the air filling pipeline is connected to the air outlet. The air filling switch is used to control the opening or closing of the air source. By controlling the air filling switch to open the air source, air can be filled into the chamber of the workpiece 200 through the air filling pipeline. By controlling the air filling switch to close the air source, the air filling of the chamber of the workpiece 200 can be stopped. The pressure detection part 130 can be selected as a pressure gauge, and the detection end of the pressure gauge is connected to the air outlet to detect the pressure value in the chamber. The display end of the pressure gauge can be placed on the workbench 112, so that the operator can understand the current pressure value in the chamber in real time. With such a configuration, when the air tightness of the chamber of the workpiece 200 is detected, the air filling switch is controlled to be opened, air is filled into the chamber through the air filling pipeline, and the pressure in the chamber is detected in real time through the pressure detection part 130. When the pressure in the chamber reaches the preset pressure, the air filling switch is controlled to be closed, the air filling into the chamber is stopped, and after maintaining the pressure for a period of time, the pressure value change of the pressure detection component 130 is observed, and the real-time pressure value in the chamber detected by the pressure detection component 130 is compared with the preset pressure value. If the real-time pressure value detected by the pressure detection component 130 decreases, and the real-time pressure value is less than the preset pressure value, it means that there is a leakage in the chamber of the workpiece 200, and the workpiece 200 is unqualified and needs to be repaired or replaced. The method of detecting pressure by filling air can detect the parts of the workpiece 200 that are difficult to detect, and the air tightness detection tool 100 of the oil circuit under the main valve cover of the active lubrication valve can eliminate the gaps caused by installation problems at the installation surface of the workpiece 200, thereby improving the detection accuracy. By way of example, the pressure holding time can be one minute, and the air tightness of all chambers of the workpiece 200 can be checked at one time, thereby improving the detection efficiency.

[0050] In some examples, the preset pressure value ranges from 650 KPa to 700 KPa.

[0051] It is understandable that the preset pressure value may range from 650 KPa to 700 KPa to simulate the pressure value in the lower cover chamber when the lower cover stores the silicone oil required for the active lubrication valve, thereby ensuring detection accuracy and practicality.

[0052] In some examples, the above-mentioned active lubrication valve main valve lower cover oil circuit air tightness detection tool 100 also includes: an anti-rust leak detection agent, which is used to apply it to the screw plug of the above-mentioned workpiece 200 after the pressure in the above-mentioned chamber reaches the above-mentioned preset pressure value and maintains the pressure, and in the case of bubbles in the above-mentioned screw plug, it is determined that there is leakage on the outer surface of the above-mentioned screw plug and / or the surrounding side of the above-mentioned screw plug.

[0053] It is understandable that the active lubrication valve main valve lower cover oil circuit air tightness detection tool 100 can also be provided with an anti-rust leak detection agent, which can generate bubbles when the anti-rust leak detection agent detects a leak, so as to clearly observe the leak position, and the anti-rust leak detection agent has an anti-rust function, which can prevent the workpiece 200 from rusting during use and improve the protection. Specifically, the workpiece 200 has a plurality of process holes, and the process holes can be plugged with screw plugs to avoid leakage at the process holes. When the air tightness of the chamber of the workpiece 200 is detected, the air is first fully introduced into the chamber through the air filling pipeline so that the pressure in the chamber of the workpiece 200 reaches a preset pressure value, and then the anti-rust leak detection agent can be applied to the outer surface of the screw plug and the surrounding side joint part to observe whether bubbles are generated at the part where the anti-rust leak detection agent is applied. If bubbles are generated, it means that the screw plug and / or the surrounding side joint part of the workpiece 200 leaks, and it is necessary to check the plugging of the screw plug and whether there are defects on the surface of the process hole. If there are no bubbles, it means that the screw plug is in good condition. Then turn off the air filling switch, maintain the pressure for a period of time, and observe the change of the pressure value of the pressure detection component 130. If the real-time pressure value detected by the pressure detection component 130 is less than the preset pressure value, it means that there is a leak in the chamber of the workpiece 200. After the active lubrication valve main valve lower cover oil circuit air tightness detection tool 100 provides a sealing environment for the installation surface of the workpiece 200, the leakage of the easily detectable parts of the outer surface of the workpiece 200 can be detected by applying anti-rust leak detection agent. The method of filling air into the chamber to detect the chamber pressure can detect the leakage in the chamber of the workpiece 200 that is not easy to detect, so as to ensure the accuracy of the detection result.

[0054] It should be noted that after applying the anti-rust leak detection agent and filling the chamber with air to detect the chamber pressure, it is necessary to exhaust the compressed air in the chamber and use an air gun to blow dry the anti-rust leak detection agent on the surface of the workbench 112, the base 113 and the workpiece 200.

[0055] In some examples, such as Figure 1 and Figure 2 As shown, the fixing portion 120 includes: a positioning pin 121, which is arranged on the seat body 113 and is used to cooperate with the bolt hole of the workpiece 200 to position the workpiece 200 on the seat body 113; and a pressing claw 122, which is used to fix the workpiece 200 on the seat body 113 after the workpiece 200 is positioned.

[0056] It is understandable that the fixing portion 120 may be provided with a positioning pin 121 and a pressure claw 122. The positioning pin 121 may be vertically upwardly arranged on the seat 113, and the workpiece 200 may be provided with a bolt hole. The positioning pin 121 may cooperate with the bolt hole to limit the degree of freedom of the workpiece 200 through the positioning pin 121, so that the workpiece 200 is positioned on the seat 113, and the mounting surfaces of the seat 113 and the workpiece 200 have the same shape, which may further improve the positioning accuracy of the workpiece 200. After the workpiece 200 is positioned, the workpiece 200 is fixed to the seat 113 by the pressure claw 122. The pressure claw 122 applies pressure to the workpiece 200 to ensure the fixing effect of the workpiece 200, and through cooperation with the sealing ring 140, gaps are avoided at the mounting surface of the workpiece 200 due to installation problems, thereby improving the accuracy of the detection results.

[0057] Exemplarily, both the positioning pins 121 and the bolt holes can be provided in plurality, and the numbers of the two correspond to each other, so as to further limit the multi-directional degrees of freedom of the workpiece 200 and improve the positioning reliability. Both the positioning pins 121 and the bolt holes can be provided in plurality.

[0058] In some examples, such as Figure 1 and Figure 2 As shown, the fixing portion 120 further includes a driving member 123 for driving the pressing claw 122 to press or release the workpiece 200 .

[0059] It is understandable that the fixing part 120 may also be provided with a driving member 123, which drives the pressure jaw 122 to tighten or loosen the workpiece 200, so as to realize automatic fixing of the workpiece 200, reduce labor costs, and control the pressure of the pressure jaw 122 accurately to avoid damaging the surface of the workpiece 200, improve reliability, and improve clamping efficiency.

[0060] In some examples, such as Figure 1 and Figure 2 As shown, the driving member 123 includes: a cylinder 1231, which is arranged in the placement space inside the frame 111, and the output end of the cylinder 1231 extends out of the frame 111; a first pin body 1232 and a second pin body 1233, and the pressing claw 122 includes a clamping section 1222 and a connecting section 1221, wherein the clamping section 1222 is rotatably connected to the connecting section 1221 through the first pin body 1232, and the connecting section 1221 is rotatably connected to the output end of the cylinder 1231 through the second pin body 1233.

[0061] It is understandable that the driving member 123 may be provided with a cylinder 1231, a first pin body 1232 and a second pin body 1233. A placement space is formed inside the frame 111, and the pressing claw 122 is driven to move by the cylinder 1231. The pressing claw 122 is provided with a clamping section 1222 and a connecting section 1221, wherein the clamping section 1222 is used to clamp the workpiece 200, and the clamping section 1222 is rotatably connected to the connecting section 1221 through the first pin body 1232, and the connecting section 1221 is rotatably connected to the output end of the cylinder 1231 through the second pin body 1233, and the connection between the connecting section 1221 and the second pin body 1233 is located at the table surface of the workbench 112. With such a configuration, the power of the cylinder 1231 is transmitted to the connecting section 1221 through the second pin body 1233, and is transmitted to the clamping section 1222 through the first pin body 1232, so that the clamping section 1222 clamps the workpiece 200. The first pin body 1232 and the second pin body 1233 can enable the pressing jaw 122 to rotate at multiple angles, thereby improving flexibility and facilitating adjustment of the position and angle of the pressing jaw 122 to ensure that the pressing jaw 122 can press the workpiece 200 .

[0062] It should be noted that the number of driving members 123 and pressing claws 122 corresponds to each other, and each driving member 123 drives the corresponding pressing claw 122 separately to achieve independent control. Exemplarily, the number of driving members 123 and pressing claws 122 can be set to three. The three pressing claws 122 are arranged at intervals to be able to press multiple places of the workpiece 200, ensure uniform distribution of the pressing force, and improve stability.

[0063] It should be noted that after the air tightness test is completed, the compressed air in the chamber needs to be exhausted, and the cylinder 1231 is shut down so that the piston of the cylinder 1231 is retracted, and the first pin 1232 and the second pin 1233 drive the pressing claw 122 to release the workpiece 200 and return to the initial position. Then the workpiece 200 is taken out and stored according to qualified and unqualified products, and the anti-rust leak detection agent on the workbench 112, the seat 113 and the workpiece 200 is blown dry with an air gun.

[0064] In some examples, the fixing portion 120 further includes a rubber sleeve, which is sleeved on the pressing claw 122 and is used to press one end of the workpiece 200 .

[0065] It is understandable that the fixing portion 120 may also be provided with a rubber sleeve. Specifically, the rubber sleeve is provided on the pressing end of the pressing claw 122, so that when the pressing claw 122 presses the workpiece 200, the rubber sleeve contacts the workpiece 200, effectively avoiding the hard contact between the pressing claw 122 and the workpiece 200 and causing damage to the workpiece 200, thereby improving the protection.

[0066] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0067] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0068] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An active lubrication valve main valve lower cover oil circuit air tightness detection tool, characterized in that: include: A tooling body, used for placing a workpiece, the tooling body being used to match a mounting surface of the workpiece; A fixing part, used for fixing the workpiece to the tooling body; an airtightness detection unit for detecting the airtightness of the workpiece when each passage of the workpiece forms a sealed chamber; Wherein, the workpiece is the lower cover of the main valve of the active lubrication valve.

2. The active lubrication valve main valve lower cover oil circuit air tightness detection tool according to claim 1 is characterized in that: The tooling body comprises: Frame; A workbench, mounted on the top of the frame; A seat body is arranged on the workbench, the seat body is used to install the workpiece, and the shape of the seat body is used to match the installation surface of the workpiece.

3. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 2 is characterized in that: Also includes: A sealing ring is arranged on the seat body and is used to form sealed chambers for each passage of the workpiece.

4. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 3 is characterized in that: The airtightness detection unit comprises: An air charging pipeline, wherein the portion of the seat body located within the sealing ring is provided with an air outlet, one end of the air charging pipeline is used to be connected to an air source, and the other end is connected to the air outlet; A pressure detection member, used for detecting the internal pressure of the chamber; Air charging switch, used to control the opening or closing of the air source; Among them, the air tightness detection unit conveys air flow into the chamber through the air filling pipeline to make the pressure in the chamber reach a preset pressure value and maintain the pressure, and then compares the real-time pressure value detected by the pressure detection component with the preset pressure value. When the real-time pressure value is less than the preset pressure value, it is determined that the chamber is leaking.

5. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 4 is characterized in that: The preset pressure value ranges from 650KPa to 700KPa.

6. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 4 is characterized in that: Also includes: The rust-proof leak detection agent is used to apply to the screw plug of the workpiece after the pressure in the chamber reaches the preset pressure value and is maintained, and to determine whether leakage occurs on the outer surface of the screw plug and / or around the screw plug when bubbles exist at the screw plug.

7. The tool for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to any one of claims 2 to 6, characterized in that: The fixing portion comprises: A positioning pin, disposed on the seat body, for cooperating with a bolt hole of the workpiece to position the workpiece on the seat body; The pressure claw is used to fix the workpiece to the seat body after the workpiece is positioned.

8. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 7 is characterized in that: The fixing portion further comprises: The driving member is used for driving the pressing claw to press or release the workpiece.

9. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 8 is characterized in that: The driving member comprises: A cylinder is arranged in the placement space inside the frame, and an output end of the cylinder extends out of the frame; A first pin body and a second pin body, the pressing claw comprises a pressing section and a connecting section, wherein the pressing section is rotatably connected to the connecting section through the first pin body, and the connecting section is rotatably connected to the output end of the cylinder through the second pin body.

10. The tooling for detecting the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 7 is characterized in that: The fixing portion further comprises: A rubber sleeve is sleeved on one end of the pressing claw and is used for pressing the workpiece.

Images