CN213393288U

CN213393288U - Nitrogen spring overtravel safety structure

Info

Publication number: CN213393288U
Application number: CN202022341541.4U
Authority: CN
Inventors: 张栋; 杜祥森
Original assignee: Jiangsu Jigu Precision Machinery Technology Co ltd
Current assignee: Jiangsu Jigu Precision Machinery Technology Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-06-08
Anticipated expiration: 2030-10-20

Abstract

The utility model discloses a nitrogen gas spring overtravel safety structure, the power distribution cylinder comprises a cylinder body, be equipped with the plunger in the cylinder body, the plunger with be equipped with seal assembly between the cylinder body, cylinder body lower extreme one side is connected with the inflation valve through first air flue, cylinder body lower extreme opposite side is connected with first cavity through the second air flue, first cavity is kept away from second air flue one side is equipped with the second cavity, be equipped with the end cap in the second cavity. Has the advantages that: can push away the end cap to the second cavity in when nitrogen spring overstroke, atmospheric pressure in the cylinder body is too big to can carry out the pressure release in the cylinder body through pressure release channel, thereby can effectually prevent to receive the high pressure influence behind the plunger fracture that appears nitrogen spring because of atmospheric pressure in the cylinder body is too big and fly out or the emergence of the accident that the nitrogen spring cylinder body breaks and explodes.

Description

Nitrogen spring overtravel safety structure

Technical Field

The utility model relates to a nitrogen spring field particularly, relates to a nitrogen spring overtravel safety structure.

Background

The nitrogen springs currently on the market do not have the function of preventing over-travel use. In case the user is in the use in case maloperation or other reasons surpass nitrogen spring's regulation stroke, lead to the internal atmospheric pressure of cylinder too big, exceed the bearing scope of cylinder body and plunger, can appear receiving high pressure after the plunger fracture of nitrogen spring and fly out or the nitrogen spring cylinder body breaks and explodes and causes the risk that equipment damages or personnel are seriously injured. This type of situation has also been excessive and has resulted in serious personal injury and loss.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nitrogen gas spring overtravel safety structure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a nitrogen spring overtravel safety structure includes the cylinder body, be equipped with the plunger in the cylinder body, the plunger with be equipped with seal assembly between the cylinder body, cylinder body lower extreme one side is connected with the inflation valve through first air flue, cylinder body lower extreme opposite side is connected with first cavity through the second air flue, first cavity is kept away from second air flue one side is equipped with the second cavity, be equipped with the end cap in the second cavity, end cap one end stretches into in the second cavity, just the fixed cover of end cap outer wall is equipped with seal ring, the end cap is kept away from second cavity one end is fixed and is equipped with a plurality of springs, just the spring is kept away from end cap one end with second cavity inner wall fixed connection, end cap one end is equipped with stop device, both ends all are equipped with the pressure release passageway.

Further, the sealing assembly comprises a dustproof sealing cover, an inner sleeve, a supporting ring and a sealing ring, the dustproof sealing cover is fixed to the inner wall of the upper end of the cylinder body, the inner sleeve is fixedly sleeved on the outer wall, close to the lower end, of the plunger, the supporting ring is fixedly sleeved on the outer wall of the lower end of the plunger, and the sealing ring is fixedly sleeved on the outer wall of the supporting ring.

Furthermore, the lower end of the plunger is provided with an air storage cavity.

Furthermore, a plug is arranged outside the inflation valve.

Furthermore, the limiting device comprises a sliding rod and a sliding cavity, the sliding rod is fixedly arranged at one end, far away from the first cavity, of the plug, and the sliding cavity matched with the sliding rod is formed in one side wall, far away from the first cavity, of the second cavity.

Furthermore, the pressure relief channel is far away from one end of the second cavity body and is fixedly provided with a dust screen.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses a set up cylinder body, plunger, pneumatic valve, first cavity, second cavity, end cap, seal ring, spring and pressure release passageway, can be when nitrogen spring overtravel, the atmospheric pressure in the cylinder body is too big pushes away the end cap to the second cavity in to can carry out the pressure release in the cylinder body through pressure release passageway, thereby can effectually prevent because of the atmospheric pressure in the cylinder body too big the plunger fracture back that appears nitrogen spring and receive the high pressure influence departure or the emergence of the explosive accident of breaking of nitrogen spring cylinder body.

(2) The utility model discloses a set up dustproof sealing lid, endotheca, support ring and sealing washer, can make to have good leakproofness between plunger and the cylinder body to can effectually play dirt-proof effect.

(3) The utility model discloses a set up the plug, can effectually protect the inflation valve.

(4) The utility model discloses a set up slide bar and smooth chamber, can utilize the limiting displacement of slide bar and smooth chamber to carry on spacingly to the movement track of end cap for the end cap can be along linear motion.

(5) The utility model discloses a set up the dust screen, can effectually prevent the jam that the pressure release passageway leads to because of getting into the dust.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a nitrogen spring overtravel safety structure according to an embodiment of the present invention;

fig. 2 is an enlarged view of a structure at a in fig. 1.

Reference numerals:

1. a cylinder body; 2. a plunger; 3. an inflation valve; 4. a first air passage; 5. a first cavity; 6. a second air passage; 7. a second cavity; 8. a plug; 9. a sealing gasket; 10. a spring; 11. a pressure relief channel; 12. a dust-proof sealing cover; 13. an inner sleeve; 14. a support ring; 15. a seal ring; 16. a gas storage cavity; 17. plugging by screwing; 18. a slide bar; 19. a slide chamber; 20. a dust screen.

Detailed Description

The following, with reference to the drawings and the detailed description, further description of the present invention is made:

the first embodiment is as follows:

referring to fig. 1-2, a nitrogen spring over-stroke safety structure according to an embodiment of the present invention includes a cylinder body 1, a plunger 2 is disposed in the cylinder body 1, a sealing assembly is disposed between the plunger 2 and the cylinder body 1, one side of a lower end of the cylinder body 1 is connected to an inflation valve 3 through a first air passage 4, the other side of the lower end of the cylinder body 1 is connected to a first cavity 5 through a second air passage 6, a second cavity 7 is disposed on a side of the first cavity 5 away from the second air passage 6, a plug 8 is disposed in the second cavity 7, one end of the plug 8 extends into the second cavity 7, a sealing gasket 9 is fixedly disposed on an outer wall of the plug 8, a plurality of springs 10 are fixedly disposed on an end of the plug 8 away from the second cavity 7, an end of the spring 10 away from the plug 8 is fixedly connected to an inner wall of the second cavity 7, a limiting device is disposed on, and the upper end and the lower end of the second cavity 7 are respectively provided with a pressure relief channel 11.

Through the above technical scheme of the utility model, can be when the nitrogen spring overtravel, the atmospheric pressure in the cylinder body 1 is too big pushes away end cap 8 to second cavity 7 internal pushing to can carry out the pressure release in to cylinder body 1 through pressure release channel 11, thereby can effectually prevent because of the too big emergence of the plunger 2 fracture back of appearing nitrogen spring of cylinder body 1 internal gas pressure receive the high pressure influence departure or the emergence of the fried accident of breaking of nitrogen spring cylinder body 1.

Example two:

referring to fig. 1, for a surface sealing assembly, the sealing assembly includes a dustproof sealing cover 12, an inner sleeve 13, a supporting ring 14 and a sealing ring 15, the dustproof sealing cover 12 is fixed on an inner wall of the upper end of the cylinder 1, the inner sleeve 13 is fixedly sleeved on an outer wall of the plunger 2 near the lower end, the supporting ring 14 is fixedly sleeved on an outer wall of the lower end of the plunger 2, and the sealing ring 15 is fixedly sleeved on an outer wall of the supporting ring 14; for the plunger 2, the lower end of the plunger 2 is provided with an air storage cavity 16; for the inflation valve 3, a plug 17 is provided on the outside of the inflation valve 3.

Through the above technical scheme of the utility model, dustproof sealing lid 12, endotheca 13, support ring 14 and sealing washer 15 can make and have good leakproofness between plunger 2 and the cylinder body 1 to can effectually play dirt-proof effect, plug 17 can effectually protect inflation valve 3.

Example three:

referring to fig. 1-2, for the limiting device, the limiting device includes a sliding rod 18 and a sliding cavity 19, the sliding rod 18 is fixedly disposed at one end of the plug 8 away from the first cavity 5, and the sliding cavity 19 matched with the sliding rod 18 is disposed on one side wall of the second cavity 7 away from the first cavity 5; for the pressure relief channel 11, a dust screen 20 is fixedly arranged at one end of the pressure relief channel 11, which is far away from the second cavity 7.

Through the above technical scheme of the utility model, can utilize slide bar 18 and sliding chamber 19's limiting displacement to carry on spacingly to end cap 8's movement track for end cap 8 can be along linear motion, and dust screen 20 can effectually prevent the jam that pressure release passageway 11 leads to because of getting into the dust.

For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.

In practical application, when the nitrogen spring exceeds the stroke, the plug 8 is pushed into the second cavity 7 and compresses the spring 10 by the overlarge air pressure in the cylinder body 1, so that the nitrogen in the cylinder body 1 can enter the first cavity 5 and the second cavity 7 through the second air passage 6 and is finally charged into the pressure relief channel 11 to be discharged, the larger the air pressure in the cylinder body 1 is, the larger the degree of pressing the plug 8 into the second cavity 7 is, the higher the pressure relief speed is, and the pressure relief can be performed in the cylinder body 1 through the pressure relief channel 11, so that the accident that the plunger 2 of the nitrogen spring breaks and flies out or the nitrogen spring cylinder body 1 breaks and explodes due to the influence of high pressure caused by the overlarge air pressure in the cylinder body 1 can be effectively prevented, the dustproof sealing cover 12, the inner sleeve 13, the support ring 14 and the sealing ring 15 can ensure that the sealing performance between the plunger 2 and the cylinder body 1 is good, and can effectively play, the plug 17 can effectively protect the inflation valve 3, and can limit the movement track of the plug 8 by using the limiting effects of the slide rod 18 and the slide cavity 19, so that the plug 8 can move along a straight line, and the dust screen 20 can effectively prevent the blockage of the pressure relief channel 11 caused by entering dust.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The nitrogen spring overtravel safety structure is characterized by comprising a cylinder body (1), wherein a plunger (2) is arranged in the cylinder body (1), a sealing component is arranged between the plunger (2) and the cylinder body (1), one side of the lower end of the cylinder body (1) is connected with an inflation valve (3) through a first air passage (4), the other side of the lower end of the cylinder body (1) is connected with a first cavity (5) through a second air passage (6), one side, far away from the second air passage (6), of the first cavity (5) is provided with a second cavity (7), a plug (8) is arranged in the second cavity (7), one end of the plug (8) extends into the second cavity (7), a sealing gasket (9) is fixedly sleeved on the outer wall of the plug (8), one end, far away from the second cavity (7), of the plug (8) is fixedly provided with a plurality of springs (10), and the spring (10) is far away from one end of the plug (8) and fixedly connected with the inner wall of the second cavity (7), one end of the plug (8) is provided with a limiting device, and the upper end and the lower end of the second cavity (7) are provided with pressure relief channels (11).

2. The nitrogen spring overtravel safety structure as claimed in claim 1, wherein said sealing assembly comprises a dustproof sealing cover (12), an inner sleeve (13), a supporting ring (14) and a sealing ring (15), said dustproof sealing cover (12) is fixed on the inner wall of the upper end of said cylinder (1), said inner sleeve (13) is fixedly sleeved on the outer wall of said plunger (2) near the lower end, said supporting ring (14) is fixedly sleeved on the outer wall of the lower end of said plunger (2), and said sealing ring (15) is fixedly sleeved on the outer wall of said supporting ring (14).

3. The nitrogen spring overtravel safety structure as claimed in claim 1, wherein the lower end of the plunger (2) is provided with a gas storage cavity (16).

4. A nitrogen spring overtravel safety structure as claimed in claim 1, wherein the charging valve (3) is externally provided with a plug (17).

5. The nitrogen spring overtravel safety structure as claimed in claim 1, wherein the limiting device comprises a sliding rod (18) and a sliding cavity (19), the sliding rod (18) is fixedly arranged at one end of the choke plug (8) far away from the first cavity (5), and the sliding cavity (19) matched with the sliding rod (18) is formed in one side wall of the second cavity (7) far away from the first cavity (5).

6. The nitrogen spring overtravel safety structure as claimed in claim 1, wherein a dust screen (20) is fixedly arranged at one end of the pressure relief channel (11) far away from the second cavity (7).