Plugging device for nitrogen filling of nitrogen spring

Abstract

The utility model discloses a plugging device for nitrogen filling of a nitrogen spring, which relates to the technical field of plugging devices and comprises a main body, the upper end of the main body is fixedly connected with a cover plate through a plurality of bolts, the lower end of the cover plate is provided with a push plate, one end of the push plate close to the cover plate is fixedly connected with a connecting column, and one end of the connecting column far away from the push plate penetrates into the cover plate. The end, away from the push plate, of the connecting column is fixedly connected with a first push block, the side wall, away from the connecting column, of the first push block is slidably connected with a second push block, the side wall, away from the first push block, of the second push block is fixedly connected with a push column, and the end, away from the second push block, of the push column is fixedly connected with a clamping block. When the annular compression air bag extrudes and seals the movable plug, the annular compression air bag drives the clamping blocks to be clamped into the limiting grooves, the main body and the cover plate are secondarily limited through the evenly-distributed clamping blocks, and the connection stability of the main body and the cover plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plugging devices, in particular to a plugging device for nitrogen filling of a nitrogen spring. Background Art

[0002] Nitrogen spring is a component with elastic function. It is an upgraded product of conventional coil spring and a high-tech, domestically produced alternative product. It seals high-pressure nitrogen in a certain container. External force compresses the nitrogen through the plunger rod. When the external force is removed, the high-pressure nitrogen expands to obtain a certain elastic force. This component is called a nitrogen cylinder or gas spring, or nitrogen spring for short.

[0003] Chinese patent document CN213954226U discloses a nitrogen spring nitrogen filling and plugging device, including a main body, the main body is composed of a movable plug, an outer wall groove, an inflation valve, a compression chamber, an electromagnetic valve, an air guide tube, a compression airbag, a guide block, a flap, a fixed seat, a fixing hole, a knob head, a sliding cover plate, a first slider, a first slide groove, a side block, a limit plate, a front end block, a support head and a screw. The side block is provided on the outside of the first slide groove, and the first slider is located at a corresponding position at the lower end of the first slide groove. The above-mentioned nitrogen spring nitrogen filling and plugging device has shortcomings. Although the device can achieve protection against explosions, it has limitations. The cover plate and the main body are fixed and installed by a single screw. The compression chamber is in a high-pressure state after being compressed. When the compression chamber explodes, the cover plate connected by the screws is directly blown away, so that the flying cover plate causes harm to personnel, and its stability is poor.

[0004] Therefore, in order to solve such problems, we propose a plugging device for nitrogen filling of a nitrogen spring. Utility Model Content

[0005] The utility model aims to provide a nitrogen spring nitrogen filling plugging device, aiming to solve the problem of poor stability of the existing nitrogen spring nitrogen filling plugging device in the above-mentioned background technology due to the single screw fixing installation between the cover plate and the main body during use.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a plugging device for nitrogen filling of a nitrogen spring, comprising a main body, an inner side wall of the main body is provided with a limiting groove, an inner bottom wall of the main body is fixedly connected with a compression cabin, an inner side wall of the compression cabin is slidably connected with a movable plug, an upper end of the compression cabin is fixedly connected with an annular compression airbag, an upper end of the movable plug penetrates the annular compression airbag, four electric valves are fixedly connected with the side wall of the compression cabin, one end of the electric valve is sealed and fixedly connected with a connecting pipe, and an end of the connecting pipe away from the electric valve is sealed and fixedly connected with the annular compression airbag, a cover plate is fixedly connected with the upper end of the main body through a plurality of bolts, a push plate is arranged at the lower end of the cover plate, an end of the push plate close to the cover plate is fixedly connected with a connecting column, an end of the connecting column away from the push plate penetrates into the inside of the cover plate, an end of the connecting column away from the push plate is fixedly connected with a first push block, a side wall of the first push block away from the connecting column is slidably connected with a second push block, a side wall of the second push block away from the first push block is fixedly connected with a push column, an end of the push column away from the second push block is fixedly connected with a card block, and an end of the card block away from the push column is located in the limiting groove.

[0007] Preferably, the outer side wall of the main body is provided with four positioning grooves, and the side wall of the cover plate is fixedly connected with four positioning blocks, and the positioning blocks are respectively located in the positioning grooves.

[0008] Preferably, the side wall of the push column is movably sleeved with a spring body, and the spring body is in a compressed state.

[0009] Preferably, one end of the block close to the inner wall of the main body is provided with a rounded corner.

[0010] Preferably, the cover plate is in a stepped shape, and a rubber ring is fixedly connected to the lower end of the cover plate.

[0011] Preferably, the side wall of the main body is fixedly connected with an inflation valve, the side wall of the main body is threadedly connected with a protective shell, and the inflation valve is located inside the protective shell.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, a push plate, a connecting column, a first push block, a second push block, a push column, a spring body and a clamping block are provided. When the compression chamber is in a compressed state, the annular compression airbag squeezes and seals the movable plug while the shaped compression airbag drives the clamping block to be clamped into the limiting groove. The evenly distributed clamping blocks are used to secondary limit the main body and the cover plate, thereby increasing the connection stability between the main body and the cover plate, and solving the problem that when the compression chamber in a high-pressure state explodes, the cover plate connected with screws is directly blown away, causing the flying cover plate to cause harm to personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional schematic diagram of a plugging device for nitrogen filling of a nitrogen spring proposed by the utility model;

[0015] Figure 2 A three-dimensional explosion diagram of a plugging device for nitrogen filling of a nitrogen spring proposed in the utility model Figure 1 ;

[0016] Figure 3 A three-dimensional explosion diagram of a plugging device for nitrogen filling of a nitrogen spring proposed in the utility model Figure 2 ;

[0017] Figure 4 This is a three-dimensional schematic diagram of the internal structure of a plugging device for nitrogen filling of a nitrogen spring proposed by the utility model;

[0018] Figure 5 It is a three-dimensional exploded schematic diagram of the internal structure of a cover plate in a plugging device for nitrogen filling of a nitrogen spring proposed by the utility model.

[0019] Legend:

[0020] 1. Main body; 101. Limiting groove; 102. Positioning groove; 11. Compression chamber; 12. Movable plug; 13. Annular compression airbag; 14. Electric valve; 15. Connecting pipe; 2. Cover plate; 21. Push plate; 22. Connecting column; 23. First push block; 24. Second push block; 25. Push column; 26. Spring body; 27. Block; 28. Rubber ring; 29. ​​Positioning block; 3. Inflating valve; 31. Protective shell. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Reference Figure 1-5 The utility model provides an embodiment: a plugging device for nitrogen spring nitrogen filling, including a main body 1, a limiting groove 101 is provided on the inner side wall of the main body 1, a compression chamber 11 is fixedly connected to the inner bottom wall of the main body 1, a movable plug 12 is slidably connected to the inner side wall of the compression chamber 11, an annular compression airbag 13 is fixedly connected to the upper end of the compression chamber 11, the upper end of the movable plug 12 penetrates the annular compression airbag 13, four electric valves 14 are fixedly connected to the side wall of the compression chamber 11, one end of the electric valve 14 is sealed and fixedly connected to a connecting pipe 15, and the end of the connecting pipe 15 away from the electric valve 14 is sealed and fixedly connected to the annular compression airbag 13, the main body 1 The upper end is fixedly connected with the cover plate 2 by a plurality of bolts, and a push plate 21 is arranged at the lower end of the cover plate 2. The end of the push plate 21 close to the cover plate 2 is fixedly connected with a connecting column 22, and the end of the connecting column 22 away from the push plate 21 penetrates into the cover plate 2, and the end of the connecting column 22 away from the push plate 21 is fixedly connected with a first push block 23, and the first push block 23 is slidably connected with a second push block 24 away from the side wall of the connecting column 22, and the second push block 24 is fixedly connected with a push column 25 away from the side wall of the first push block 23, and the end of the push column 25 away from the second push block 24 is fixedly connected with a clamping block 27, and the end of the clamping block 27 away from the push column 25 is located in the limiting groove 101.

[0024] The arrangement is such that during the use of the nitrogen spring, the movable plug 12 is pressed down, which compresses the nitrogen in the compression chamber 11, opens the electric valve 14, and the nitrogen enters the annular compression airbag 13 through the connecting pipe 15 to inflate it. The annular compression airbag 13 simultaneously squeezes and seals the movable plug 12, and squeezes the push plate 21 to move vertically upward, so that the push plate 21 drives the connecting column 22 to move vertically upward, so that the connecting column 22 drives the first push block 23 to move vertically upward, so that the first push block 23 drives the second push block 24 to slide horizontally, so that the second push block 24 drives the push column 25 to slide horizontally, so that the push column 25 drives the card block 27 to be stuck in the limit groove 101, thereby increasing the stability of the connection between the cover plate 2 and the main body 1, and avoiding the separation of the cover plate 2 and the main body 1 due to excessive impact force when the compression chamber 11 explodes.

[0025] Four positioning grooves 102 are formed on the outer wall of the main body 1 , and four positioning blocks 29 are fixedly connected to the side wall of the cover plate 2 . The positioning blocks 29 are respectively located in the positioning grooves 102 for positioning the cover plate 2 , so that the cover plate 2 can be quickly installed while preventing the blocking blocks 27 from being unable to be inserted into the limiting grooves 101 .

[0026] A spring body 26 is movably sleeved on the side wall of the push column 25 . The spring body 26 is in a compressed state and is used to reset the clamping block 27 so that the clamping block 27 can slide into the cover plate 2 .

[0027] One end of the clamping block 27 close to the inner wall of the main body 1 is provided with a rounded corner to prevent the clamping block 27 from getting stuck with the inner wall of the main body 1 when the clamping block 27 slides into the limiting groove 101 .

[0028] The cover plate 2 is in a stepped shape, and a rubber ring 28 is fixedly connected to the lower end of the cover plate 2 to increase the sealing performance between the cover plate 2 and the main body 1 .

[0029] The side wall of the main body 1 is fixedly connected with an inflation valve 3, and the side wall of the main body 1 is threadedly connected with a protective shell 31. The inflation valve 3 is located in the protective shell 31, which is used to protect the inflation valve 3 and increase the service life of the inflation valve 3.

[0030] Working principle: First, during the use of the nitrogen spring, the active plug 12 is pressed down, which compresses the nitrogen in the compression chamber 11, opens the electric valve 14, and the nitrogen enters the annular compression airbag 13 through the connecting pipe 15 to inflate it. The annular compression airbag 13 squeezes and seals the active plug 12 at the same time, and squeezes the push plate 21 to move vertically upward, so that the push plate 21 drives the connecting column 22 to move vertically upward, so that the connecting column 22 drives the first push block 23 to move vertically upward, so that the first push block 23 pushes the second push block 24 to slide horizontally, so that the second push block 24 The block 24 drives the push column 25 to slide horizontally, so that the push column 25 drives the card block 27 to be stuck in the limit groove 101, thereby increasing the stability of the connection between the cover plate 2 and the main body 1, and avoiding the separation of the cover plate 2 and the main body 1 due to excessive impact force when the compression chamber 11 explodes. When replacing the compression chamber 11 after the explosion, since the card block 27 is directly reset by the spring body 26, the bolts between the main body 1 and the cover plate 2 can be directly unscrewed, and then replaced. When installing the main body 1 and the cover plate 2, the positioning block 29 is stuck in the positioning groove 102, and then the bolts are tightened.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plugging device for nitrogen spring nitrogen filling, comprising a main body (1), characterized in that: The inner side wall of the main body (1) is provided with a limiting groove (101); the inner bottom wall of the main body (1) is fixedly connected to a compression chamber (11); the inner side wall of the compression chamber (11) is slidably connected to a movable plug (12); the upper end of the compression chamber (11) is fixedly connected to an annular compression airbag (13); the upper end of the movable plug (12) penetrates the annular compression airbag (13); the side wall of the compression chamber (11) is fixedly connected to four electric valves (14); one end of the electric valve (14) is sealed and fixedly connected to a connecting pipe (15); the end of the connecting pipe (15) away from the electric valve (14) is sealed and fixedly connected to the annular compression airbag (13); the upper end of the main body (1) is fixedly connected to a cover plate (2) by a plurality of bolts; the cover plate (2 ) is provided with a push plate (21) at the lower end, one end of the push plate (21) close to the cover plate (2) is fixedly connected to a connecting column (22), one end of the connecting column (22) away from the push plate (21) passes through the inside of the cover plate (2), one end of the connecting column (22) away from the push plate (21) is fixedly connected to a first push block (23), a side wall of the first push block (23) away from the connecting column (22) is slidably connected to a second push block (24), a side wall of the second push block (24) away from the first push block (23) is fixedly connected to a push column (25), one end of the push column (25) away from the second push block (24) is fixedly connected to a clamping block (27), and one end of the clamping block (27) away from the push column (25) is located in a limiting groove (101).

2. A plugging device for nitrogen filling of a nitrogen spring according to claim 1, characterized in that: The outer wall of the main body (1) is provided with four positioning grooves (102), and the side wall of the cover plate (2) is fixedly connected with four positioning blocks (29), and the positioning blocks (29) are respectively located in the positioning grooves (102).

3. A plugging device for nitrogen filling of a nitrogen spring according to claim 1, characterized in that: The side wall of the push column (25) is movably sleeved with a spring body (26), and the spring body (26) is in a compressed state.

4. A plugging device for nitrogen filling of a nitrogen spring according to claim 1, characterized in that: One end of the block (27) close to the inner side wall of the main body (1) is provided with a rounded corner.

5. A plugging device for nitrogen filling of a nitrogen spring according to claim 1, characterized in that: The cover plate (2) is in a stepped shape, and a rubber ring (28) is fixedly connected to the lower end of the cover plate (2).

6. A plugging device for nitrogen filling of a nitrogen spring according to claim 1, characterized in that: The side wall of the main body (1) is fixedly connected with an inflation valve (3), the side wall of the main body (1) is threadedly connected with a protective shell (31), and the inflation valve (3) is located inside the protective shell (31).

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