Excavator oil way system pipe joint air tightness test device

Abstract

The invention relates to the technical field of excavator oil way system pipe joint airtightness test, and discloses an excavator oil way system pipe joint airtightness test device, which comprises a supporting platform, the bottom of the supporting platform is fixedly connected with a supporting frame, and the top of the supporting platform is fixedly connected with a detection table. According to the device, the clamping piece is arranged, firstly, a driving rod pushes a port in one end of a detection cup to move by extruding a second spring, at the moment, one end of a joint body firstly enters the port, and in this way, horizontal positioning of the joint body by the port is facilitated; a driving rod pushes a sealing ring at one end of a detection cup on an extrusion spring II to extrude one end of the joint body, and the extrusion force between the sealing ring in a port and the two ends of the joint body is increased, so that the sealing ring can seal the joint body; high-pressure gas cannot leak through the two ends of the joint body in the detection process of the joint body, so that the detection accuracy of the device is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness testing equipment for pipe joints of an oil circuit system of an excavator, in particular to an air tightness testing device for pipe joints of an oil circuit system of an excavator. Background Art

[0002] The hydraulic oil circuit system of the equipment has extremely high requirements for air tightness. The pipe joints used in the hydraulic oil circuit system are important components connecting the hydraulic oil circuit. The pipe joints are mostly castings. In the actual production process, the castings themselves will produce tiny pores due to the casting process. If uninspected pipe joints are directly used in the hydraulic oil circuit, it is bound to cause serious problems of oil leakage in the system.

[0003] Therefore, it is very important to test the air tightness of the pipe joints in the oil system. The test equipment under the existing device usually adopts extrusion test for the air tightness test of the joints. The two ends of the joints need to be sealed before the joint test. When sealing the joints, it is necessary to ensure that the two ends of the joints are stably clamped by the clamping tooling, otherwise it will cause leakage at the two ends of the joints, affecting the accuracy of the device detection. Summary of the Invention

[0004] The purpose of the present invention is to provide an air tightness test device for pipe joints of an oil circuit system of an excavator, so as to solve the problems raised in the above-mentioned background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a device for testing the air tightness of pipe joints in an oil circuit system of an excavator, comprising a support platform, a support frame fixedly connected to the bottom of the support platform, a test platform fixedly connected to the top of the support platform, a plurality of mounting slots provided on the top of the test platform, a joint body provided on the top of the test platform, a test panel provided on the top of the support platform, and further comprising: The tooling part is arranged on the top of the test bench, and the tooling part directly above the test bench is used to install and fix the joint body; and The detection part is installed inside the installation slide groove on the top of the testing table. The detection part clamps and fixes the joint body by cooperating with the tooling part, and at the same time, the detection part performs air tightness detection on the joint body; Among them, the tooling department initially limits the joint body, cooperates with the detection department to clamp and fix the joint body from both ends, and then judges the air tightness of the joint body through the changes in air pressure inside the detection department.

[0006] Furthermore, the tooling department includes: The limiter is arranged just above the testing platform and is used to limit the position of the connector body; The driving member is installed on the top of the detection platform and is used to drive the detection part to move toward the two ends of the joint body for clamping.

[0007] Furthermore, the limiting member includes a positioning boss fixedly connected to the top of the detection platform, a detection groove is opened in the middle of the positioning boss, and a plurality of limiting grooves are opened at the bottom of the detection groove.

[0008] Furthermore, the limiting component also includes a plurality of limiting blocks slidably connected to the inside of the limiting groove, the limiting blocks are used to limit the joint body, and the side walls of the limiting blocks are fixedly connected with a plurality of extrusion springs.

[0009] Furthermore, the driving member includes a driving motor fixedly connected to the side wall of the detection platform, the output end of the driving motor is fixedly connected to a driving shaft 1, and the driving shaft 1 rotates and penetrates the detection platform; Among them, several thread grooves are opened in the middle of the driving shaft 1, and the end of the driving shaft 1 away from the driving motor is connected to the driving belt, and the end of the driving belt away from the driving shaft 1 is connected to the driving shaft 2, and the driving shaft 2 rotates and passes through the detection table.

[0010] Furthermore, the detection unit includes: The clamping part is arranged in the installation slot provided on the top of the test bench, and the driving part drives the clamping part to move toward the two ends of the joint body to clamp; The pressure piece is installed just above the test bench and is used to pressurize the inside of the joint body; The sensor is installed inside the clamping part and is used to detect the pressure changes inside the joint body, thereby judging the air tightness of the joint body.

[0011] Furthermore, the clamping part includes a driving rod rotatably connected to the threaded groove, a detection cup is slidably connected inside the mounting groove on the top of the detection table, the middle part of the driving rod is slidably connected to the detection cup, and an extrusion spring 2 is provided on the end of the detection cup close to the driving rod.

[0012] Furthermore, the clamping member further comprises a port provided at an end of the detection cup away from the driving rod, and a sealing ring is fixedly connected to the interior of the port.

[0013] Furthermore, the pressure member includes a pressure pump fixedly connected to the top of the testing platform, the output end of the pressure pump is fixedly connected to a hose, a one-way valve is fixedly connected directly above the testing cup, and the end of the hose away from the pressure pump is fixedly connected to the one-way valve.

[0014] Furthermore, the sensing element includes a pressure sensor fixedly connected to the end of the detection cup away from the sealing ring, an air pressure detection chamber is opened inside the detection cup, a piston piece is slidably connected inside the air pressure detection chamber, and a pressure spring is fixedly connected to one side of the piston piece; Among them, the end of the pressure spring away from the piston plate is fixedly connected to a pressure transmission plate, the pressure transmission plate is in contact with one end of the pressure sensor, the end of the pressure sensor away from the pressure transmission plate is fixedly connected to a sensing line, and the end of the sensing line away from the pressure sensor is connected to the detection panel.

[0015] The present invention has the following beneficial effects: (1) The present invention, by setting a clamping member, drives the output end of the motor to drive the driving shaft 1 and the driving shaft 2 to rotate simultaneously, and the driving member drives the detection cup on the driving rod to move along the installation slide groove just above the detection platform toward one end of the joint body. First, the driving rod pushes the port at one end of the detection cup to move through the extrusion spring 2. At this time, one end of the joint body first enters the port. This setting is conducive to the port to horizontally position the joint body. When the driving member continues to drive the clamping member to move, the driving rod pushes the sealing ring at one end of the detection cup on the extrusion spring 2 to squeeze one end of the joint body. As the extrusion spring 2 contracts, the squeezing force between the sealing ring inside the port and the two ends of the joint body increases. This setting is conducive to the sealing ring to seal the joint body, ensuring that the high-pressure gas of the joint body will not leak through the two ends of the joint body during the detection process, thereby ensuring the accuracy of the detection of the device.

[0016] (2) According to the present invention, when using the air tightness test device for the pipe joint of the oil circuit system of the excavator, the joint body is first placed into the detection groove on the positioning boss. At this time, a clamping groove of the joint body is formed between a number of limit blocks under the action of the extrusion spring. When the joint body is placed into the clamping groove between the limit blocks, the limit member is started to drive a number of detection cups on the clamping member to clamp the two ends of the joint body. This arrangement is conducive to ensuring that the joint body remains stable during the air tightness test, thereby enhancing the stability of the joint body test.

[0017] (3) The present invention provides a pressure-increasing member. When the clamping member clamps the connector body, the pressure pump applies pressure to the inside of the test cup through the one-way valve at one end of the hose. At this time, the connector body is pressurized through the port at one end of the one-way valve. While the connector body is pressurized, the piston plate moves along the air pressure detection chamber to squeeze the pressure spring toward the end close to the pressure sensor as the pressure in the inner cavity of the connector body increases. When the pressure reaches the specified standard detection air pressure, the pressure pump stops working. At this time, if the pressure value transmitted to the detection panel by the pressure sensor remains stable, it proves that the air tightness of the connector body is good. When there is air leakage in the connector body, the piston plate will slide along the air pressure detection chamber to the end away from the pressure sensor. At this time, the squeezing force of the pressure transmission plate on the pressure sensor is reduced. The pressure value displayed on the detection panel continuously decreases, indicating that the air tightness of the connector body is poor.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 For the present invention Figure 2 A magnified view of middle A; Figure 4 It is a schematic diagram of the local structure of the present invention; Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of middle B; Figure 7 This is a schematic structural diagram of the pressure member of the present invention; Figure 8 This is a schematic cross-sectional structural diagram of the sensor element of the present invention.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Support platform; 11. Support frame; 12. Test table; 13. Test panel; 2. Tooling; 21. Limiting member; 211. Positioning boss; 212. Test slot; 213. Limiting slot; 214. Limiting block; 215. Connector body; 216. Extrusion spring 1; 22. Driving member; 221. Driving motor; 222. Driving shaft 1; 223. Threaded groove; 224. Driving belt; 225. Driving shaft 2 ;3. Detection part; 31. Clamping part; 311. Driving rod; 312. Extrusion spring 2; 313. Detection cup; 314. Port; 315. Sealing ring; 32. Pressurizing part; 321. Pressurizing pump; 322. Hose; 323. One-way valve; 33. Sensing part; 331. Pressure sensor; 332. Air pressure detection chamber; 333. Piston plate; 334. Pressure spring; 335. Pressure transmission plate; 336. Sensing line. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1, please refer to Figures 1-6 As shown, the present invention is an excavator oil system pipe joint air tightness test device, including a support platform 1, the bottom of the support platform 1 is fixedly connected to a support frame 11, the top of the support platform 1 is fixedly connected to a test platform 12, the top of the test platform 12 is provided with a plurality of mounting slots, the top of the test platform 12 is provided with a joint body 215, the top of the support platform 1 is provided with a test panel 13, and further comprising: The tooling part 2 is provided on the top of the testing platform 12 . The tooling part 2 directly above the testing platform 12 is used to install and fix the joint body 215 ; and The detection part 3 is installed in the installation slot on the top of the detection platform 12. The detection part 3 clamps and fixes the joint body 215 by cooperating with the tooling part 2. At the same time, the detection part 3 performs airtightness detection on the joint body 215; Among them, the tooling part 2 initially limits the joint body 215, cooperates with the detection part 3 to clamp and fix the joint body 215 from both ends, and then judges the air tightness of the joint body 215 through the change of air pressure inside the detection part 3.

[0024] Tooling Department 2 includes: The limiting member 21 is provided directly above the testing platform 12 and is used to accommodate and limit the connector body 215; The driving member 22 is installed on the top of the detection platform 12 and is used to drive the detection part 3 to move toward the two ends of the joint body 215 to clamp.

[0025] The limiting member 21 includes a positioning boss 211 fixedly connected to the top of the detection platform 12 . A detection slot 212 is defined in the middle of the positioning boss 211 , and a plurality of limiting slots 213 are defined at the bottom of the detection slot 212 .

[0026] The limiting member 21 further includes a plurality of limiting blocks 214 slidably connected to the inside of the limiting groove 213 . The limiting blocks 214 are used to limit the joint body 215 . The side walls of the limiting blocks 214 are fixedly connected to a plurality of extrusion springs 216 .

[0027] The driving member 22 includes a driving motor 221 fixedly connected to the side wall of the detection platform 12, and the output end of the driving motor 221 is fixedly connected to a driving shaft 1 222, and the driving shaft 1 222 rotates and penetrates the detection platform 12; Among them, a plurality of thread grooves 223 are opened in the middle of the driving shaft 1 222, and a transmission belt 224 is connected to the end of the driving shaft 1 222 away from the driving motor 221, and a driving shaft 2 225 is connected to the end of the driving belt 224 away from the driving shaft 1 222. The driving shaft 2 225 rotates and passes through the detection table 12. The function of this component is that when using the excavator oil system pipe joint air tightness test device, the joint body 215 is first placed into the detection groove 212 on the positioning boss 211. At this time, under the action of the extrusion spring 1 216, a clamping groove of the joint body 215 is formed between the plurality of limit blocks 214. When the joint body 215 is placed in the clamping groove between the limit blocks 214, the starting limit member 21 drives the plurality of detection cups 313 on the clamping member 31 to clamp the two ends of the joint body 215. This arrangement is conducive to ensuring that the joint body 215 remains stable during the air tightness test, thereby enhancing the stability of the joint body 215 test.

[0028] Example 2 is distinguished from Example 1 in that: Figures 1-8 As shown, the detection unit 3 includes: The clamping member 31 is disposed in a mounting slot provided on the top of the test platform 12 , and the driving member 22 drives the clamping member 31 to move toward both ends of the joint body 215 to clamp; A pressurizing member 32 is installed directly above the testing platform 12 and is used to pressurize the interior of the joint body 215 ; The sensor 33 is installed inside the clamping member 31 . The sensor 33 is used to detect the pressure change inside the joint body 215 , thereby determining the air tightness of the joint body 215 .

[0029] The clamping member 31 includes a driving rod 311 rotatably connected to the threaded groove 223, a detection cup 313 is slidably connected inside the mounting groove at the top of the detection platform 12, the middle part of the driving rod 311 is slidably connected to the detection cup 313, and an extrusion spring 2 312 is provided on the end of the detection cup 313 close to the driving rod 311.

[0030] The clamping member 31 also includes a port 314 provided at the end of the detection cup 313 away from the driving rod 311. A sealing ring 315 is fixedly connected to the interior of the port 314. The function of this component is to drive the output end of the driving motor 221 to drive the driving shaft 1 222 and the driving shaft 2 225 to rotate simultaneously by setting the clamping member 31. The driving member 22 drives the detection cup 313 on the driving rod 311 to move along the installation slide groove just above the detection table 12 toward one end of the joint body 215. First, the driving rod 311 pushes the port 314 at one end of the detection cup 313 to move by squeezing the second spring 312. At this time, one end of the joint body 215 first enters the interior of the port 314. This arrangement is conducive to the horizontal positioning of the connector body 215 by the port 314. When the driving member 22 continues to drive the clamping member 31 to move, the driving rod 311 pushes the sealing ring 315 at one end of the detection cup 313 on the extrusion spring 2 312 to produce extrusion between the sealing ring 315 and one end of the connector body 215. As the extrusion spring 2 312 contracts, the extrusion force between the sealing ring 315 inside the port 314 and the two ends of the connector body 215 increases. This arrangement is conducive to the sealing ring 315 to seal the connector body 215, ensuring that high-pressure gas of the connector body 215 will not leak through the two ends of the connector body 215 during the detection process, thereby ensuring the accuracy of the detection of the device.

[0031] The pressure member 32 includes a pressure pump 321 fixedly connected to the top of the testing platform 12, the output end of the pressure pump 321 is fixedly connected to a hose 322, a one-way valve 323 is fixedly connected directly above the testing cup 313, and the end of the hose 322 away from the pressure pump 321 is fixedly connected to the one-way valve 323.

[0032] The sensing element 33 includes a pressure sensor 331 fixedly connected to the end of the detection cup 313 away from the sealing ring 315. The pressure sensor 331 is a standard industrial pressure sensor of the PT124G-210 model. The detection cup 313 defines an air pressure detection chamber 332. A piston plate 333 is slidably connected to the air pressure detection chamber 332. A pressure spring 334 is fixedly connected to one side of the piston plate 333. Among them, the end of the pressure spring 334 away from the piston plate 333 is fixedly connected to the pressure transmission plate 335, the pressure transmission plate 335 is in contact with one end of the pressure sensor 331, the end of the pressure sensor 331 away from the pressure transmission plate 335 is fixedly connected to the sensing line 336, and the end of the sensing line 336 away from the pressure sensor 331 is connected to the detection panel 13. The function of this component is to set a pressure member 32. When the clamping member 31 clamps the joint body 215 tightly, the pressure pump 321 pressurizes the inside of the detection cup 313 through the one-way valve 323 at one end of the hose 322. At this time, the inside of the joint body 215 is pressurized through the port 314 at one end of the one-way valve 323. When the inside of the joint body 215 is pressurized, the active As the pressure in the inner cavity of the connector body 215 increases, the plug 333 squeezes the pressure spring 334 along the air pressure detection cavity 332 and moves toward the end close to the pressure sensor 331. When the pressure is squeezed to the specified standard detection air pressure, the pressure pump 321 stops working. At this time, if the pressure value transmitted to the detection panel 13 by the pressure sensor 331 remains stable, it proves that the air tightness of the connector body 215 is good. When there is an air leak in the connector body 215, the piston plate 333 will slide along the air pressure detection cavity 332 toward the end away from the pressure sensor 331. At this time, the squeezing force of the pressure transmission plate 335 on the pressure sensor 331 is reduced. The pressure value displayed on the detection panel 13 continues to decrease, indicating that the air tightness of the connector body 215 is poor.

[0033] A specific application of this embodiment is: When using the excavator oil system pipe joint air tightness test device, first put the joint body 215 into the detection groove 212 on the positioning boss 211. At this time, under the action of the extrusion spring 1 216, a clamping groove of the joint body 215 is formed between several limit blocks 214. When the joint body 215 is placed in the clamping groove between the limit blocks 214, the limit member 21 is started to drive the several detection cups 313 on the clamping member 31 to clamp the two ends of the joint body 215. This arrangement is conducive to ensuring that the joint body 215 remains stable during the air tightness test, thereby enhancing the stability of the joint body 215 test. By setting the clamping member 31, the output end of the driving motor 221 drives the driving shaft 1 222 and the driving shaft 2 225 to rotate simultaneously, and the driving member 22 drives the detection cup 313 on the driving rod 311 to follow the installation groove just above the test platform 12. When the clamping member 31 is moved to one end of the connector body 215, the rod 311 is first driven to push the port 314 at one end of the detection cup 313 through the second squeezing spring 312 to move. At this time, one end of the connector body 215 first enters the interior of the port 314. This arrangement is conducive to the port 314 to horizontally position the connector body 215. When the driving member 22 continues to drive the clamping member 31 to move, the driving rod 311 pushes the sealing ring 315 at one end of the detection cup 313 on the second squeezing spring 312 to squeeze one end of the connector body 215. As the second squeezing spring 312 contracts, the squeezing force between the sealing ring 315 inside the port 314 and the two ends of the connector body 215 increases. This arrangement is conducive to the sealing ring 315 to seal the connector body 215, ensuring that the high-pressure gas of the connector body 215 will not leak through the two ends of the connector body 215 during the detection process, thereby ensuring the accuracy of the detection of the device. By setting the pressurizing member 32, when the clamping member 31 clamps the joint body 215, the pressure pump 321 pressurizes the inside of the detection cup 313 through the one-way valve 323 at one end of the hose 322. At this time, the inside of the joint body 215 is pressurized through the port 314 at one end of the one-way valve 323. While the inside of the joint body 215 is pressurized, the piston piece 333 moves along the air pressure detection cavity 332 to squeeze the pressure spring 334 toward the end close to the pressure sensor 331 as the pressure in the inner cavity of the joint body 215 increases. When the pressure reaches a specified value, the piston piece 333 moves along the air pressure detection cavity 332 to squeeze the pressure spring 334. When the standard air pressure is detected, the pressure pump 321 stops working. At this time, when the pressure value transmitted to the detection panel 13 by the pressure sensor 331 remains stable, it proves that the air tightness of the connector body 215 is good. When there is a leak in the connector body 215, the piston plate 333 will slide along the air pressure detection cavity 332 toward the end away from the pressure sensor 331. At this time, the squeezing force of the pressure transmission plate 335 on the pressure sensor 331 is reduced. The continuous decrease in the pressure value displayed on the detection panel 13 indicates that the air tightness of the connector body 215 is poor.

[0034] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An excavator oil system pipe joint air tightness test device, comprising a support platform (1), the bottom of the support platform (1) is fixedly connected to a support frame (11), the top of the support platform (1) is fixedly connected to a detection platform (12), the top of the detection platform (12) is provided with a plurality of mounting slots, the top of the detection platform (12) is provided with a joint body (215), and the top of the support platform (1) is provided with a detection panel (13), characterized in that: Also includes: A tooling part (2), the tooling part (2) being arranged on the top of the inspection platform (12), and the tooling part (2) directly above the inspection platform (12) being used for installing and fixing the joint body (215); and A detection part (3), the detection part (3) is installed inside the installation slot on the top of the detection platform (12), the detection part (3) clamps and fixes the joint body (215) by cooperating with the tooling part (2), and the detection part (3) performs an airtightness test on the joint body (215); The tooling part (2) initially limits the position of the connector body (215), cooperates with the detection part (3) to clamp and fix the connector body (215) from both ends, and then judges the degree of air tightness of the connector body (215) through the change of air pressure inside the detection part (3).

2. The air tightness test device for the oil system pipe joints of an excavator according to claim 1, characterized in that: The tooling part (2) comprises: A limiting member (21), the limiting member (21) being arranged directly above the detection platform (12), and the limiting member (21) being used to accommodate and limit the joint body (215); A driving member (22) is installed on the top of the detection platform (12), and the driving member (22) is used to drive the detection part (3) to move toward the two ends of the joint body (215) for clamping.

3. The air tightness test device for the oil system pipe joints of an excavator according to claim 2, characterized in that: The limiting member (21) comprises a positioning boss (211) fixedly connected to the top of the detection platform (12), a detection groove (212) is provided in the middle of the positioning boss (211), and a plurality of limiting grooves (213) are provided at the bottom of the detection groove (212).

4. The air tightness test device for the oil system pipe joints of an excavator according to claim 3, characterized in that: The limiting member (21) further comprises a plurality of limiting blocks (214) slidably connected to the inside of the limiting groove (213), wherein the limiting blocks (214) are used to limit the joint body (215), and a plurality of extrusion springs (216) are fixedly connected to the side walls of the limiting blocks (214).

5. The air tightness test device for the oil system pipe joints of an excavator according to claim 2, characterized in that: The driving member (22) includes a driving motor (221) fixedly connected to a side wall of the detection platform (12), an output end of the driving motor (221) is fixedly connected to a driving shaft 1 (222), and the driving shaft 1 (222) rotates and penetrates the detection platform (12); A plurality of thread grooves (223) are provided in the middle of the driving shaft 1 (222), and one end of the driving shaft 1 (222) away from the driving motor (221) is connected to a driving belt (224), and one end of the driving belt (224) away from the driving shaft 1 (222) is connected to a driving shaft 2 (225), and the driving shaft 2 (225) rotates and passes through the detection table (12).

6. The air tightness test device for the oil system pipe joints of an excavator according to claim 1, characterized in that: The detection unit (3) includes: A clamping member (31), wherein the clamping member (31) is arranged in a mounting slot provided on the top of the inspection platform (12), and the driving member (22) drives the clamping member (31) to move toward both ends of the joint body (215) for clamping; A pressurizing member (32), the pressurizing member (32) being installed directly above the testing platform (12), and the pressurizing member (32) being used to pressurize the interior of the joint body (215); A sensor (33) is installed inside the clamping member (31). The sensor (33) is used to detect pressure changes inside the connector body (215) to determine the air tightness of the connector body (215).

7. The excavator oil system pipe joint air tightness test device according to claim 6, characterized in that: The clamping member (31) includes a driving rod (311) rotatably connected to the threaded groove (223), a detection cup (313) is slidably connected inside the mounting groove at the top of the detection platform (12), a middle portion of the driving rod (311) is slidably connected to the detection cup (313), and an end of the detection cup (313) close to the driving rod (311) is sleeved with a second extrusion spring (312).

8. The excavator oil system pipe joint air tightness test device according to claim 7, characterized in that: The clamping member (31) further comprises a port (314) provided at one end of the detection cup (313) away from the driving rod (311), and a sealing ring (315) is fixedly connected to the interior of the port (314).

9. The excavator oil system pipe joint air tightness test device according to claim 6, characterized in that: The pressurizing member (32) comprises a pressurizing pump (321) fixedly connected to the top of the testing platform (12); the output end of the pressurizing pump (321) is fixedly connected to a hose (322); a one-way valve (323) is fixedly connected directly above the testing cup (313); and the end of the hose (322) away from the pressurizing pump (321) is fixedly connected to the one-way valve (323).

10. The excavator oil system pipe joint air tightness test device according to claim 8, characterized in that: The sensing element (33) includes a pressure sensor (331) fixedly connected to one end of the detection cup (313) away from the sealing ring (315); an air pressure detection chamber (332) is provided inside the detection cup (313); a piston plate (333) is slidably connected inside the air pressure detection chamber (332); and a pressure spring (334) is fixedly connected to one side of the piston plate (333); The end of the pressure spring (334) away from the piston plate (333) is fixedly connected to a pressure transmission plate (335), the pressure transmission plate (335) is in contact with one end of the pressure sensor (331), the end of the pressure sensor (331) away from the pressure transmission plate (335) is fixedly connected to a sensing line (336), and the end of the sensing line (336) away from the pressure sensor (331) is connected to the detection panel (13).

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