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

Abstract

The utility model 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 disclosure relates to the technical field of valve body air tightness detection, and in particular to a tool for detecting the air tightness of the oil circuit of the lower cover of the main valve of an active lubrication valve. Background Art

[0002] In related technologies, the active lubrication valve is a key component in the braking system of railway freight cars. Compared to existing valves, the active lubrication valve adds an oil chamber and oil circuit within the main piston rod. During the operation of the brake valve, the lubricating oil in the oil chamber is continuously supplied to the sliding surfaces of the control valve and the slide valve through the oil circuit, reducing damage to the working surfaces 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 component used to store the silicone oil required for the active lubrication valve. To ensure that the oil chamber and oil circuit within the lower cover are unobstructed and leak-free, the lower cover of the active lubrication valve must undergo an airtightness test. However, there is currently no tooling for testing the airtightness of the oil circuit of the main valve lower cover of the active lubrication valve. Utility Model Content

[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 cooperate with the mounting surface of the workpiece;

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

[0007] an airtightness detection unit for detecting the airtightness of the workpiece when the passages of the workpiece form 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 embodiment, the tool body includes:

[0010] frame;

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

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

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

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

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

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

[0017] A pressure detection component, used to detect the internal pressure of the 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 air flow into the above-mentioned chamber through the above-mentioned air filling pipe, so that the pressure in the above-mentioned chamber reaches the 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 further 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. When bubbles are present in the above-mentioned screw plug, it is determined that leakage occurs on the outer surface of the above-mentioned screw plug and / or around the above-mentioned screw plug.

[0023] In a feasible embodiment, 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 pressure claw is used to fix the workpiece to the base after the workpiece is positioned.

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

[0027] The driving member is used to drive the pressing claw to tighten or loosen the workpiece.

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

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

[0030] A first pin body and a second pin body, the pressing claw includes 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.

[0031] In a feasible embodiment, 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 by 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. The fixing part presses the workpiece to keep the workpiece in the assembly position at the tool body, and the various passages of the workpiece form 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 skilled in the art upon reading the detailed description of the exemplary embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

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

[0036] Figure 2 This is a schematic structural diagram from another angle of a tool for detecting the air tightness of the oil circuit of the lower cover of the main valve of an active lubrication valve provided by an embodiment of the present invention.

[0037] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and 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 pressing 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] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although 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. Rather, 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 an embodiment of the present disclosure, a tool 100 for detecting 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, and the above-mentioned tool body 110 is used to cooperate with the installation surface of the above-mentioned workpiece 200; a fixing part 120, for fixing the above-mentioned workpiece 200 to the above-mentioned tool body 110; an air tightness detection part, when each passage of the above-mentioned workpiece 200 forms a sealed chamber, the air tightness of the above-mentioned workpiece 200 is detected by the above-mentioned air tightness detection part; wherein, the above-mentioned workpiece 200 is the lower cover of the main valve of the active lubrication valve.

[0041] The tool 100 for testing the oil circuit air tightness of the lower cover of the main valve of an active lubrication valve provided in the present disclosure comprises a tool body 110, a fixing portion 120, and an air tightness testing portion. The tool body 110 is used to position a workpiece 200, which is the lower cover of the main valve of the active lubrication valve. The end surface of the tool body 110, where the workpiece 200 is mounted, fully mates with the mounting surface of the workpiece 200, thereby reducing the gap between the workpiece 200 and the tool body 110. The workpiece 200 is fixed to the tool body 110 by the fixing portion 120. The fixing portion 120 presses the workpiece 200 to maintain the workpiece 200 in the assembly position on the tool body 110, and the various passages of the workpiece 200 form a sealed chamber. Therefore, the fixing portion 120 and the tool body 110 cooperate to make the workpiece 200 meet the airtightness test conditions, so as to ensure that the workpiece 200 is stable during the airtightness test, eliminate external factors such as loosening of the workpiece 200 or the tool body 110, resulting in a gap between the workpiece 200 and the tool body 110 and leakage, etc., which affects the accuracy of the test results and improves reliability. After the workpiece 200 is installed, the airtightness of the workpiece 200 is tested by the airtightness testing portion to determine whether the airtightness 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. The airtightness 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, and 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 can be used as a supporting body to support 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, can be placed on the workbench 112 for ease of use and improved efficiency. The base 113 is set 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 smoothly clamped to the base 113, thereby achieving 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 installation problems on the airtightness detection of the workpiece 200, and improve reliability.

[0044] For example, a mounting groove is provided on the base 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 further includes: a sealing ring 140, which is arranged on 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 understood that the active lubrication valve main valve lower cover oil circuit air tightness testing tool 100 may also be provided with a sealing ring 140. The sealing ring 140 can be installed on the mounting surface of the base body 113. When the workpiece 200 is installed, the sealing ring 140 contains all the passages of the workpiece 200, ensuring the sealing effect of each passage of the workpiece 200 and forming a sealed chamber. With this arrangement, when the workpiece 200 is installed on the base body 113, due to the matching shapes of the mounting surfaces of the base body 113 and the workpiece 200, the base body 113 can restrict the freedom of the workpiece 200 and reduce the gap between the workpiece 200 and the base body 113. The sealing ring 140 can further achieve a seal on the workpiece 200, improving reliability.

[0047] It should be noted that the end surface of the seat body 113 facing the workpiece 200 may be provided with a groove body, and the sealing ring 140 may be arranged in the groove body to limit the freedom of the sealing ring 140 through the groove body to prevent the sealing ring 140 from moving 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 pipe, 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 pipe 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 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 pressure detection component 130 with the above-mentioned preset pressure value. When the real-time pressure value is less than the above-mentioned preset pressure value, it is determined that the above-mentioned chamber is leaking.

[0049] It is understood that the airtightness detection unit may also be provided with an air charging pipeline, a pressure detection element 130, and an air charging switch. Specifically, the base 113 is located within the sealing ring 140 and is provided with an air outlet. One end of the air charging pipeline is connected to an air source, and the other end of the air charging pipeline is connected to the air outlet. The air charging switch is used to control the opening and closing of the air source. By turning on the air charging switch, air can be charged into the chamber of the workpiece 200 through the air charging pipeline. By turning off the air charging switch, air can be charged into the chamber of the workpiece 200. The pressure detection element 130 may be a pressure gauge, with the detection end of the pressure gauge connected to the air outlet to detect the pressure value within the chamber. The display end of the pressure gauge can be placed on the workbench 112 to allow the operator to understand the current pressure value within the chamber in real time. With this arrangement, when testing the airtightness of the chamber of the workpiece 200, the air charging switch is turned on to charge air into the chamber through the air charging pipeline, and the pressure within the chamber is detected in real time by the pressure detection element 130. When the pressure in the chamber reaches the preset pressure, the air filling switch is controlled to be closed, and the air filling into the chamber is stopped. 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 indicates that there is a leak 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 parts of the workpiece 200 that are difficult to detect, and the air tightness detection fixture 100 of the oil circuit under the cover of the active lubrication valve main valve can eliminate gaps caused by installation problems at the installation surface of the workpiece 200, thereby improving detection accuracy. For example, the pressure holding time can be one minute, and the air tightness of all cavities of the workpiece 200 can be checked at one time, thereby improving 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 can range from 650KPa to 700KPa 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 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 leakage occurs 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. When the anti-rust leak detection agent detects a leak, bubbles can be generated to clearly observe the leak location. The anti-rust leak detection agent has an anti-rust function to prevent the workpiece 200 from rusting during use, thereby improving protection. Specifically, the workpiece 200 has multiple process holes, and the process holes can be sealed with screw plugs to prevent leakage at the process holes. When the air tightness of the chamber of the workpiece 200 is tested, 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. Then, the anti-rust leak detection agent can be applied to the outer surface of the screw plug and the surrounding side joints to observe whether bubbles are generated in the area where the anti-rust leak detection agent is applied. If bubbles are generated, it means that the screw plug and / or the surrounding side joints of the workpiece 200 are leaking. It is necessary to check the sealing condition of the screw plug and whether there are defects on the surface of the process hole. If there are no bubbles, it means 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 pressure value change 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 indicates that there is a leak in the cavity 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, by applying anti-rust leak detection agent, leaks in easily detectable parts of the outer surface of the workpiece 200 can be detected. The method of filling the cavity with air to detect the cavity pressure can detect leaks in the cavity of the workpiece 200 that are difficult to detect, thereby ensuring the accuracy of the test results.

[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 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 base 113 and is used to cooperate with the bolt hole of the workpiece 200 to position the workpiece 200 on the base 113; and a pressure claw 122, which is used to fix the workpiece 200 on the base 113 after the workpiece 200 is positioned.

[0056] It is understood 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 base 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 base 113. The mounting surfaces of the base 113 and the workpiece 200 have the same shape, which can further improve the positioning accuracy of the workpiece 200. After the workpiece 200 is positioned, the pressure claw 122 is used to fix the workpiece 200 to the base 113. The pressure claw 122 applies pressure to the workpiece 200 to ensure the fixing effect of the workpiece 200, and by cooperating with the sealing ring 140, it can avoid gaps at the mounting surface of the workpiece 200 due to installation problems, thereby improving the accuracy of the detection results.

[0057] Exemplarily, a plurality of positioning pins 121 and bolt holes can be provided, and the number of the two corresponds to each other, so as to further limit the multi-directional freedom of the workpiece 200 and improve the positioning reliability. There can be four positioning pins 121 and four bolt holes.

[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 can also be provided with a driving member 123, which drives the pressure claw 122 to tighten or loosen the workpiece 200 to automatically fix the workpiece 200, reduce labor costs, and control the pressure of the pressure claw 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 above-mentioned driving member 123 includes: a cylinder 1231, which is arranged in the placement space inside the above-mentioned frame 111, and the output end of the above-mentioned cylinder 1231 extends out of the above-mentioned frame 111; a first pin body 1232 and a second pin body 1233, and the above-mentioned pressing claw 122 includes a clamping section 1222 and a connecting section 1221, wherein the above-mentioned clamping section 1222 is rotatably connected to the above-mentioned connecting section 1221 through the first pin body 1232, and the above-mentioned connecting section 1221 is rotatably connected to the output end of the above-mentioned cylinder 1231 through the second pin body 1233.

[0061] It is understood that the driving member 123 may be provided with a cylinder 1231, a first pin 1232, and a second pin 1233. A placement space is formed within the frame 111, and the pressure claw 122 is driven to move by the cylinder 1231. The pressure claw 122 is provided with a pressing section 1222 and a connecting section 1221. The pressing section 1222 is used to press the workpiece 200, and the pressing section 1222 is rotatably connected to the connecting section 1221 via the first pin 1232. The connecting section 1221 is rotatably connected to the output end of the cylinder 1231 via the second pin 1233. The connection point between the connecting section 1221 and the second pin 1233 is located on the table surface of the workbench 112. With this arrangement, the power of the cylinder 1231 is transmitted to the connecting section 1221 via the second pin 1233, and then transmitted to the pressing section 1222 via the first pin 1232, so that the pressing section 1222 presses 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 jaws 122 corresponds to each other, and each driving member 123 independently drives a corresponding pressing jaw 122, achieving independent control. For example, there are three driving members 123 and three pressing jaws 122. The three pressing jaws 122 are arranged at intervals to compress the workpiece 200 at multiple locations, ensuring uniform distribution of the pressing force and improving stability.

[0063] It should be noted that after completing the airtightness test, the compressed air in the chamber must be exhausted, and cylinder 1231 is shut down, causing the piston of cylinder 1231 to retract. The first and second pins 1232 and 1233 then drive the pressure claw 122 to release the workpiece 200 and return it to its initial position. The workpieces 200 are then removed and sorted into acceptable and unacceptable items. The anti-rust and leak detection agent on the workbench 112, base 113, and workpiece 200 is then dried using 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 understood 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 jaw 122 so that when the pressing jaw 122 presses the workpiece 200, the rubber sleeve contacts the workpiece 200, effectively preventing the pressing jaw 122 from hard contact with the workpiece 200 and causing damage to the workpiece 200, thereby improving 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. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled 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 to be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, 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 direction, and therefore, cannot be understood as a limitation on the present disclosure.

[0068] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] The above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A tool for testing the air tightness of the oil circuit under the main valve cover of an active lubrication valve, characterized in that: include: A tool body, used for placing a workpiece, the tool body being used to cooperate with a mounting surface of the workpiece; A fixing portion, used for fixing the workpiece to the tool 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 tool for testing the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve 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 tool for testing 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 tool for testing 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 includes: An air charging pipe, wherein the portion of the seat body located within the sealing ring is provided with an air outlet, one end of the air charging pipe is used to be connected to an air source, and the other end is connected to the air outlet; a pressure detection member, 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 part conveys air flow into the chamber through the air filling pipe, so that the pressure in the chamber reaches a preset pressure value and maintains the pressure, and then compares the real-time pressure value detected by the pressure detection part 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 tool for testing 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 tool for testing 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. If there are bubbles at the screw plug, it is determined that leakage occurs on the outer surface of the screw plug and / or around 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 includes: a positioning pin, provided on the base body, for cooperating with the bolt hole of the workpiece to position the workpiece on the base body; The pressure claw is used to fix the workpiece to the base after the workpiece is positioned.

8. The tool for testing 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 includes: The driving member is used for driving the pressing claw to press or release the workpiece.

9. The tool for testing 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 includes: A cylinder is disposed 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 includes 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 tool for testing the air tightness of the oil circuit of the lower cover of the main valve of the active lubrication valve according to claim 7, characterized in that: The fixing portion further includes: A rubber sleeve is sleeved on one end of the pressing claw and is used for pressing the workpiece.

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