An oil inlet pipe plugging device

Abstract

The utility model provides a kind of oil inlet pipe plugging device, and the one end of oil inlet pipe is equipped with first opening, and the outer side wall of oil inlet pipe is equipped with convex rib close to first opening, and this oil inlet pipe plugging device includes main body sleeve, and the top of main body sleeve is equipped with second opening, and the third accommodating cavity for the one end of oil inlet pipe is embedded in second opening intercommunication main body sleeve, and the inner side wall of third accommodating cavity is equipped with sealing ring for forming sealing structure with the outer side wall of oil inlet pipe;Main body sleeve is equipped with movable dog for clamping convex rib and linkage operating element for controlling movable dog movement.The utility model solves the problem of how to design a plugging device that can avoid sealing surface scratch and ensure detection reliability in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel distribution pipe sealing test equipment, and in particular to an inlet pipe sealing device. Background Technology

[0002] In the manufacturing process of fuel distribution pipes, sealing performance testing is a crucial step in ensuring product quality. Traditional fuel inlet pipe plugging devices often experience hard friction between the plug and the sealing surface of the fuel inlet pipe during plugging and unplugging, leading to scratches on the sealing surface. This affects the sealing performance and lifespan of the fuel distribution pipe, reduces product yield, and increases production costs.

[0003] Therefore, designing a sealing device that can avoid scratching the sealing surface and ensure the reliability of detection has become a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide an oil inlet pipe sealing device, which mainly solves the problem of how to design a sealing device that can avoid scratching the sealing surface and ensure the reliability of detection in the existing technology, and provides an oil inlet pipe sealing device.

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

[0006] An oil inlet pipe sealing device is provided, wherein one end of the oil inlet pipe has a first opening, and the outer side wall of the oil inlet pipe near the first opening has a rib. The device is characterized in that: the oil inlet pipe sealing device includes a main sleeve, the top of the main sleeve has a second opening, the second opening is connected to a third receiving cavity inside the main sleeve for embedding one end of the oil inlet pipe, the inner side wall of the third receiving cavity is provided with a sealing ring for forming a sealing structure with the outer side wall of the oil inlet pipe; the main sleeve is provided with a movable claw for locking the rib and a linkage operating component for controlling the movement of the movable claw.

[0007] Furthermore, the end face of the movable claw facing the oil inlet pipe has a fitting surface that matches the outer wall of the oil inlet pipe.

[0008] Furthermore, the main sleeve is provided with a first transverse channel and a second transverse channel;

[0009] The movable jaws include a first movable jaw and a second movable jaw;

[0010] The linkage operation component includes a first linkage operation component and a second linkage operation component. The first linkage operation component includes a first gripper, a first spring, a first connecting rod, and a first connecting part. A first movable claw is connected to the first connecting part. The first connecting part is connected to one end of the first connecting rod. The other end of the first connecting rod passes through the first channel and is connected to the first gripper. A first spring in a compressed state or a naturally extended state is provided between the first gripper and the main sleeve and is sleeved on the first connecting rod.

[0011] The second linkage operating component includes a second gripper, a second spring, a second connecting rod, and a second connecting part. The second movable claw is connected to the second connecting part, and the second connecting part is connected to one end of the second connecting rod. The other end of the second connecting rod passes through the second channel and is connected to the second gripper. A second spring, which is in a compressed state or a naturally extended state, is provided between the second gripper and the main sleeve and is sleeved on the second connecting rod.

[0012] Furthermore, the main sleeve is provided with an inverted T-shaped first receiving cavity and an inverted T-shaped second receiving cavity on both sides. The first receiving cavity includes an intersecting first vertical cavity and a first horizontal cavity, and the second receiving cavity includes an intersecting second vertical cavity and a second horizontal cavity. The first movable claw corresponds to the second vertical cavity, the second movable claw corresponds to the first vertical cavity, the first connecting part corresponds to the second horizontal cavity, and the second connecting part corresponds to the first horizontal cavity.

[0013] Furthermore, the first movable claw is detachably connected to the first connecting part, and the second movable claw is detachably connected to the second connecting part;

[0014] The other end of the first connecting rod is connected to the side wall of the upper half of the first grip, and the side wall of the lower half of the first grip corresponds to the second connecting part; the other end of the second connecting rod is connected to the side wall of the lower half of the second grip, and the side wall of the upper half of the first grip corresponds to the first connecting part.

[0015] Furthermore, the first movable claw is inverted L-shaped, the long side end of the first movable claw is connected to the first connecting part, and the short side end face of the first movable claw is provided with a first contact surface, which is an arc-shaped surface.

[0016] The second movable claw is inverted L-shaped. The long side end of the second movable claw is connected to the second connecting part. The short side end face of the second movable claw is provided with a second contact surface, which is arc-shaped.

[0017] Furthermore, the surface of the first bonding surface is provided with a wear-resistant coating; the surface of the second bonding surface is provided with a wear-resistant coating.

[0018] Furthermore, the first and second receiving cavities are symmetrically arranged on both sides of the main sleeve.

[0019] Furthermore, the first movable claw is detachably connected to the top of the first connecting part, and the second movable claw is detachably connected to the top of the second connecting part.

[0020] Furthermore, neither the first nor the second channel is connected to the third receiving cavity.

[0021] In view of the above technical features, the present invention has the following beneficial effects:

[0022] 1. The oil inlet pipe sealing device in this embodiment 1 can effectively avoid scratches on the oil inlet pipe sealing surface: through the operation logic of "squeezing open-releasing close", when inserting / pulling the oil inlet pipe, the first movable claw and the second movable claw are disengaged from the sealing surface, completely eliminating hard friction, protecting the integrity of the oil inlet pipe sealing surface, avoiding scratches on the oil inlet pipe sealing surface, ensuring the reliability of oil inlet pipe sealing detection, and improving the sealing performance and service life of the fuel distribution pipe.

[0023] 2. The oil inlet pipe sealing device in this embodiment 1 is convenient and efficient to operate: the first and second linkage operating parts can be manually squeezed to open and close the first and second movable jaws. The operation is simple and quick, reducing the difficulty of operation for workers and improving the efficiency of oil inlet pipe sealing detection.

[0024] 3. The oil inlet pipe sealing device in this embodiment 1 has a stable and reliable structure: the first spring and the second spring provide a stable clamping force, the first connecting part and the second connecting part ensure the movement safety of the second movable claw and the first movable claw, the sealing ring enhances the sealing effect of the oil inlet pipe, and all components work together to ensure that the sealing and detection process of the oil inlet pipe is stable and reliable, improve the product yield, and reduce production costs.

[0025] 4. The oil inlet pipe sealing device in this embodiment 1 has strong versatility: the first movable claw and the first connecting part are detachably connected, and the second movable claw and the second connecting part are detachably connected. By disassembling and replacing the first movable claw and the second movable claw, the size of the first contact surface of the first movable claw and the second contact surface of the second movable claw can be adjusted, and the size of the sealing ring can be adjusted. The oil inlet pipe sealing device can be adapted to oil inlet pipes of different specifications and is suitable for various fuel distribution pipe sealing test scenarios. Attached Figure Description

[0026] Figure 1 This is a schematic diagram (perspective view) of an oil inlet pipe sealing device in specific embodiment 1;

[0027] Figure 2 This is a schematic diagram of the main sleeve in specific embodiment 1;

[0028] Figure 3 This is a schematic diagram of the linkage operation component in specific embodiment 1;

[0029] Figure 4 This is a schematic diagram of the structure of the first linkage operation component in specific embodiment 1;

[0030] Figure 5 This is a schematic diagram of the structure of the second linkage operation component in specific embodiment 1;

[0031] Figure 6This is a perspective view of an oil inlet pipe sealing device according to specific embodiment 1;

[0032] Figure 7 This is a schematic diagram (top view angle) of an oil inlet pipe sealing device in specific embodiment 1.

[0033] Figure 8 yes Figure 7 Sectional view of AA.

[0034] In the diagram: 100, main sleeve; 110, first receiving cavity; 111, first vertical cavity; 112, first horizontal cavity; 120, second receiving cavity; 121, second vertical cavity; 122, second horizontal cavity; 130, third receiving cavity; 131, second opening; 141, first channel; 142, second channel;

[0035] 210. First linkage operating component; 211. First gripper; 212. First connecting part; 213. First connecting rod;

[0036] 220. Second linkage operating component; 221. Second gripper; 222. Second connecting part; 223. Second connecting rod;

[0037] 300. First active claw; 301. First mating surface;

[0038] 400. Second movable claw; 401. Second mating surface;

[0039] 500. First spring;

[0040] 700, the second spring;

[0041] 800, sealing ring;

[0042] 900, oil inlet pipe; 901, raised rib; 902, first opening. Detailed Implementation

[0043] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0044] See Figures 1 to 8Specific Embodiment 1: This embodiment provides an oil inlet pipe sealing device. One end of the oil inlet pipe 900 has a first opening 902, which connects to the inner cavity of the oil inlet pipe 900. A rib 901 is provided on the outer wall of the oil inlet pipe 900 near the first opening 902. The oil inlet pipe sealing device includes a main sleeve 100, which serves as the basic support structure of the device. A second opening 131 is provided at the top of the main sleeve 100, which is adapted to the oil inlet pipe 900 and connects to a third receiving cavity 130 within the main sleeve 100 for embedding one end of the oil inlet pipe 900. The inner wall of the cavity 130 is provided with a sealing ring 800 for forming a sealing structure with the outer wall of the oil inlet pipe 900. The sealing ring 800 is adapted to the sealing surface of the oil inlet pipe 900 (i.e., the outer wall of the oil inlet pipe 900 inserted into the third receiving cavity 130). When the first movable claw 300 and the second movable claw 400 grip the oil inlet pipe 900, the sealing ring 800 fits tightly against the sealing surface of the oil inlet pipe 900 to achieve a reliable seal, and the sealing ring 800 will not deform and / or damage the oil inlet pipe 900. The main sleeve 100 is provided with movable claws for gripping the protruding rib 901 and linkage operating components for controlling the movement of the movable claws.

[0045] The end face of the movable claw facing the oil inlet pipe 900 is provided with a mating surface that matches the outer wall of the oil inlet pipe 900, that is, an arc-shaped surface that adapts to the outer wall of the oil inlet pipe 900, such as the first mating surface 301 and the second mating surface 401. The arc-shaped mating surface helps the end of the claw facing the oil inlet pipe 900 to fit the shape of the oil inlet pipe 900 better, increasing the clamping effect between the movable claw and the rib 901. At this time, the rib 901 is located between the mating surface of the movable claw and the sealing ring 800 of the third receiving cavity 130, which plays a better role in fixing the oil inlet pipe 900 embedded in the third receiving cavity 130, preventing the oil inlet pipe 900 from accidentally detaching from the third receiving cavity 130, and ensuring that the third receiving cavity 130 and its sealing ring 800 achieve a stable sealing effect on the end of the oil inlet pipe 900. The main sleeve 100 has a first transverse channel 141 and a second transverse channel 142. A first connecting rod 213 is placed in the first channel 141, and a second connecting rod 223 is placed in the second channel 142. Neither the first channel 141 nor the second channel 142 communicates with the third receiving cavity 130, ensuring the sealing of the third receiving cavity 130.

[0046] In this embodiment 1, the movable claw includes a first movable claw 300 and a second movable claw 400, and the linkage operation component includes a first linkage operation component 210 and a second linkage operation component 220. The first linkage operation component 210 includes a first gripper 211, a first spring 500, a first connecting rod 213 and a first connecting part 212. The first movable claw 300 is connected to the first connecting part 212, for example, the first movable claw 300 is detachably connected to the top of the first connecting part 212. The first connecting part 212 is connected to one end of the first connecting rod 213, and the other end of the first connecting rod 213 passes through the first channel 141 and is connected to the first gripper 211. A first spring 500 in a compressed state or a naturally extended state is provided between the first gripper 211 and the main sleeve 100 and is sleeved on the first connecting rod 213.

[0047] Under normal conditions, a closing force is applied to the first movable claw 300. Specifically, the first spring 500, which is in a compressed state or naturally extended state, applies pressure to the first gripper 211. The first gripper 211 pulls the first connecting rod 213, which in turn pulls the first connecting part 212. The first connecting part 212 moves the first movable claw 300 toward the oil inlet pipe 900 until it is pressed against the outer wall of the oil inlet pipe 900. At this time, the first connecting part 212 is pressed against the main sleeve 100.

[0048] The second linkage operation component 220 includes a second gripper 221, a second spring 700, a second connecting rod 223, and a second connecting part 222. A second movable claw 400 is connected to the second connecting part 222, for example, the second movable claw 400 is detachably connected to the top of the second connecting part 222. The second connecting part 222 is connected to one end of the second connecting rod 223, and the other end of the second connecting rod 223 passes through the second channel 142 and is connected to the second gripper 221. A second spring 700, which is in a compressed state or a naturally extended state, is provided between the second gripper 221 and the main sleeve 100 and is sleeved on the second connecting rod 223.

[0049] Both the first spring 500 and the second spring 700 are stainless steel linear force springs with stable elastic force.

[0050] Under normal conditions, a closing force is applied to the second movable claw 400. Specifically, the second spring 700, which is in a compressed state or naturally extended state, applies pressure to the second gripper 221. The second gripper 221 pulls the second connecting rod 223, which in turn pulls the second connecting part 222. The second connecting part 222 moves the second movable claw 400 toward the oil inlet pipe 900 until it is pressed against the outer wall of the oil inlet pipe 900. At this time, the second connecting part 222 is pressed against the main sleeve 100. At this time, the first movable jaw and the second movable jaw clamp or hold the outer wall of the oil inlet pipe 900 from two directions. The rib 901 on the outer wall of the oil inlet pipe 900 is located below the first movable jaw and the second movable jaw. The rib 901 forms a snap-fit ​​structure with the first movable jaw and the second movable jaw. Even if the first movable jaw 300 and the second movable jaw 400 are kept in a closed and holding state, the oil inlet pipe 900 embedded in the third receiving cavity 130 is better fixed, preventing the oil inlet pipe 900 from accidentally falling out of the third receiving cavity 130, and ensuring that the third receiving cavity 130 and its sealing ring 800 achieve a stable sealing effect on one end of the oil inlet pipe 900.

[0051] Preferably, the first movable jaw 300 is inverted L-shaped, with its long side end connected to the first connecting part 212, and its short side end face provided with a first contact surface 301, which is arc-shaped; the second movable jaw 400 is also inverted L-shaped, with its long side end connected to the second connecting part 222, and its short side end face provided with a second contact surface 401, which is arc-shaped. Both the first and second contact surfaces are provided with a wear-resistant coating.

[0052] Preferably, the main sleeve 100 has an inverted T-shaped first receiving cavity 110 and an inverted T-shaped second receiving cavity 120 on both sides. For example, the first receiving cavity 110 and the second receiving cavity 120 are symmetrically arranged on both sides of the main sleeve 100. The first receiving cavity 110 includes an intersecting first vertical cavity 111 and a first horizontal cavity 112. The second receiving cavity 120 includes an intersecting second vertical cavity 121 and a second horizontal cavity 122. The first movable claw 300 corresponds to the second vertical cavity 121. The second vertical cavity 121 guides the movement of the first movable claw 300 and ensures the stability of the opening and closing action of the first movable claw 300. The second movable claw 400 corresponds to the first vertical cavity 111. The first vertical cavity 111 guides the movement of the second movable claw 400 and ensures the stability of the opening and closing action of the second movable claw 400. The first connecting part 212 corresponds to the second horizontal cavity 122, and the second connecting part 222 corresponds to the first horizontal cavity 112.

[0053] The other end of the first connecting rod 213 is connected to the side wall of the upper half of the first grip 211, and the side wall of the lower half of the first grip 211 corresponds to the second connecting part 222; the other end of the second connecting rod 223 is connected to the side wall of the lower half of the second grip 221, and the side wall of the upper half of the first grip 211 corresponds to the first connecting part 212.

[0054] When the first gripper 211 and the second gripper 221 are moved towards the central main sleeve 100 under force (i.e., the first gripper 211 and the second gripper 221 are manually squeezed, causing the first movable claw 300 and the second movable claw 400 to open against the elastic force of the first spring 500 and the second spring 700), the first spring 500 and the second spring 700 are further compressed or compressed (i.e., against the spring elastic force), and the first movable claw 300 and the second movable claw 400 move outward (i.e. away from the main sleeve 100) simultaneously, causing the first movable claw 300 and the second movable claw 400 to open outward. The two movable claws disengage from the rib 901, releasing the oil inlet pipe 900, making it easier to pull out the oil inlet pipe 900 from the third receiving cavity 130 of the main sleeve 100 or insert the oil inlet pipe 900 into the third receiving cavity 130 of the main sleeve 100. During this process, the second connecting part 222 limits the first gripper part 211, and the first connecting part 212 limits the second gripper part 221, restricting the opening range between the first movable pawl 300 and the second movable pawl 400, preventing the first movable pawl 300 and the second movable pawl 400 from dislodging from the main sleeve 100 (i.e., the corresponding first vertical cavity 111 and second vertical cavity 121 on the side wall of the main sleeve 100), thus ensuring the structural integrity and operational safety of the device. Releasing the first linkage operating member 210 and the second linkage operating member 220 causes the first movable pawl 300 and the second movable pawl 400 to reset and close, achieving the sealing operation of the oil inlet pipe 900.

[0055] Both the first connecting rod 213 and the first spring 500 have two sets. The two first connecting rods 213 are located on both sides of the third receiving cavity 130, meaning that the first connecting rods 213 do not intersect with the third receiving cavity 130 and will not compromise the sealing performance of the third receiving cavity 130. Similarly, both the second connecting rod 223 and the second spring 700 have two sets. The two second connecting rods 223 are located on both sides of the third receiving cavity 130, meaning that the second connecting rods 223 do not intersect with the third receiving cavity 130 and will not compromise the sealing performance of the third receiving cavity 130.

[0056] In this embodiment 1, an oil inlet pipe plugging device is used. In normal operation, when the oil inlet pipe 900 is plugged, the first spring 500 and the second spring 700 are naturally extended or compressed, applying a closing force to the first movable claw 300 and the second movable claw 400. The first movable claw 300 and the second movable claw 400 close and tightly hug the oil inlet pipe 900, and the sealing ring 800 is tightly fitted with the sealing surface of the oil inlet pipe 900, thus achieving a plugging and sealing.

[0057] The operation of inserting or removing the oil inlet pipe 900 into the third receiving cavity 130: Manually pinch the first linkage operating member 210 and the second linkage operating member 220 to overcome the elastic force of the first spring 500 and the first movable claw 300 and the second movable claw 400 open outward (the opening range is limited by the first connecting part 212 and the second connecting part 222). At this time, the first movable claw 300 and the second movable claw 400 are disengaged from the sealing surface of the oil inlet pipe 900, and the oil inlet pipe 900 can be easily inserted or removed. After the operation is completed, release the first linkage operating member 210 and the second linkage operating member 220. The elastic force of the first spring 500 and the second spring 700 causes the first movable claw 300 and the second movable claw 400 to reset and close, re-clamping the oil inlet pipe 900 and sealing it through the sealing ring 800.

[0058] In this embodiment 1, an oil inlet pipe sealing device is used to connect a first linkage operating component 210 of a first movable jaw 300 and a second linkage operating component 220 of a second movable jaw 400, so as to ensure the stability and coaxiality of the coordinated operation of the various components of the oil inlet pipe sealing device.

[0059] The oil inlet pipe plugging device in this embodiment 1 has the following advantages compared with the existing traditional oil inlet pipe plugging devices:

[0060] 1. The oil inlet pipe sealing device in this embodiment 1 can effectively prevent scratches on the sealing surface of the oil inlet pipe 900: through the operation logic of "squeezing open - releasing close", when inserting / pulling the oil inlet pipe 900, the first movable claw 300 and the second movable claw 400 are disengaged from the sealing surface, completely eliminating hard friction, protecting the integrity of the sealing surface of the oil inlet pipe 900, preventing scratches on the sealing surface of the oil inlet pipe 900, ensuring the reliability of the sealing detection of the oil inlet pipe 900, and improving the sealing performance and service life of the fuel distribution pipe.

[0061] 2. The oil inlet pipe sealing device in this embodiment 1 is convenient and efficient to operate: by manually squeezing the first linkage operating component 210 and the second linkage operating component 220, the first movable jaw 300 and the second movable jaw 400 can be opened and closed. The operation is simple and quick, reducing the difficulty of operation for workers and improving the efficiency of sealing detection of the oil inlet pipe 900.

[0062] 3. The oil inlet pipe sealing device in this embodiment 1 has a stable and reliable structure: the first spring 500 and the second spring 700 provide a stable clamping force, the first connecting part 212 and the second connecting part 222 ensure the safe movement of the second movable claw 400 and the first movable claw 300, the sealing ring 800 enhances the sealing effect of the oil inlet pipe 900, and the components work together to ensure that the sealing and detection process of the oil inlet pipe 900 is stable and reliable, thereby improving the product yield and reducing production costs.

[0063] 4. The oil inlet pipe sealing device in this embodiment 1 has strong versatility: the first movable claw 300 and the first connecting part 212 are detachably connected, and the second movable claw 400 and the second connecting part 222 are detachably connected. By disassembling and replacing the first movable claw 300 and the second movable claw 400, the size of the first contact surface 301 of the first movable claw 300 and the second contact surface 401 of the second movable claw 400 can be adjusted, and the size of the sealing ring 800 can be adjusted. The oil inlet pipe sealing device can be adapted to oil inlet pipes of different specifications and is suitable for various fuel distribution pipe sealing test scenarios.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. An oil inlet pipe sealing device, wherein one end of the oil inlet pipe (900) is provided with a first opening (902), and the outer side wall of the oil inlet pipe (900) near the first opening (902) is provided with a rib (901), characterized in that: The oil inlet pipe (900) sealing device includes a main sleeve (100), the top of the main sleeve (100) is provided with a second opening (131), the second opening (131) is connected to a third receiving cavity (130) inside the main sleeve (100) for embedding one end of the oil inlet pipe (900), the inner side wall of the third receiving cavity (130) is provided with a sealing ring (800) for forming a sealing structure with the outer side wall of the oil inlet pipe (900); the main sleeve (100) is provided with a movable claw for locking the protruding rib (901) and a linkage operating component for controlling the movement of the movable claw.

2. The oil inlet pipe plugging device according to claim 1, characterized in that: The end face of the movable claw facing the oil inlet pipe (900) has a mating surface that matches the outer wall of the oil inlet pipe (900).

3. The oil inlet pipe plugging device according to claim 2, characterized in that: The main sleeve (100) is provided with a first transverse channel (141) and a second transverse channel (142); The movable jaws include a first movable jaw (300) and a second movable jaw (400); The linkage operation component includes a first linkage operation component (210) and a second linkage operation component (220). The first linkage operation component (210) includes a first gripper (211), a first spring (500), a first connecting rod (213), and a first connecting part (212). A first movable claw (300) is connected to the first connecting part (212). The first connecting part (212) is connected to one end of the first connecting rod (213). The other end of the first connecting rod (213) passes through the first channel (141) and is connected to the first gripper (211). A first spring (500) in a compressed state or a naturally extended state is provided between the first gripper (211) and the main sleeve (100) and is sleeved on the first connecting rod (213). The second linkage operation component (220) includes a second gripper (221), a second spring (700), a second connecting rod (223), and a second connecting part (222). The second movable claw (400) is connected to the second connecting part (222). The second connecting part (222) is connected to one end of the second connecting rod (223). The other end of the second connecting rod (223) passes through the second channel (142) and is connected to the second gripper (221). A second spring (700) in a compressed state or a naturally extended state is provided between the second gripper (221) and the main sleeve (100) and is sleeved on the second connecting rod (223).

4. The oil inlet pipe plugging device according to claim 3, characterized in that: The main sleeve (100) is provided with an inverted T-shaped first receiving cavity (110) and an inverted T-shaped second receiving cavity (120) on both sides. The first receiving cavity (110) includes an intersecting first vertical cavity (111) and a first horizontal cavity (112). The second receiving cavity (120) includes an intersecting second vertical cavity (121) and a second horizontal cavity (122). The first movable claw (300) corresponds to the second vertical cavity (121), the second movable claw (400) corresponds to the first vertical cavity (111), the first connecting part (212) corresponds to the second horizontal cavity (122), and the second connecting part (222) corresponds to the first horizontal cavity (112).

5. The oil inlet pipe plugging device according to claim 4, characterized in that: The first movable claw (300) is detachably connected to the first connecting part (212), and the second movable claw (400) is detachably connected to the second connecting part (222); The other end of the first connecting rod (213) is connected to the side wall of the upper half of the first grip (211), and the side wall of the lower half of the first grip (211) corresponds to the second connecting part (222); the other end of the second connecting rod (223) is connected to the side wall of the lower half of the second grip (221), and the side wall of the upper half of the first grip (211) corresponds to the first connecting part (212).

6. The oil inlet pipe plugging device according to claim 5, characterized in that: The first movable claw (300) is inverted L-shaped. The long side end of the first movable claw (300) is connected to the first connecting part (212). The short side end face of the first movable claw (300) is provided with a first contact surface (301). The first contact surface (301) is arc-shaped. The second movable claw (400) is inverted L-shaped. The long side end of the second movable claw (400) is connected to the second connecting part (222). The short side end face of the second movable claw (400) is provided with a second contact surface (401). The second contact surface (401) is arc-shaped.

7. The oil inlet pipe plugging device according to claim 6, characterized in that: The surface of the first bonding surface (301) is provided with a wear-resistant coating; the surface of the second bonding surface (401) is provided with a wear-resistant coating.

8. The oil inlet pipe plugging device according to claim 7, characterized in that: The first receiving cavity (110) and the second receiving cavity (120) are symmetrically arranged on both sides of the main body sleeve (100).

9. The oil inlet pipe plugging device according to claim 8, characterized in that: The first movable claw (300) is detachably connected to the top of the first connecting part (212), and the second movable claw (400) is detachably connected to the top of the second connecting part (222).

10. The oil inlet pipe plugging device according to claim 9, characterized in that: The first channel (141) and the second channel (142) are not connected to the third receiving cavity (130).

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