CN209762107U - Nitrogen spring with overvoltage overtravel protection safety - Google Patents
Nitrogen spring with overvoltage overtravel protection safety Download PDFInfo
- Publication number
- CN209762107U CN209762107U CN201920083615.3U CN201920083615U CN209762107U CN 209762107 U CN209762107 U CN 209762107U CN 201920083615 U CN201920083615 U CN 201920083615U CN 209762107 U CN209762107 U CN 209762107U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- guide sleeve
- groove
- pressure relief
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
the utility model discloses a nitrogen spring with overvoltage overtravel protection safety, which comprises a cylinder body, a guide sleeve fixedly arranged at the upper end of the cylinder body through a snap spring, and a piston rod arranged in the cylinder body and penetrating through the guide sleeve, wherein the guide sleeve is in sealing contact with the inner wall of the cylinder body through a first sealing ring, the inner wall of the upper end of the cylinder body is provided with a pressure relief groove running through the upper end surface of the cylinder body, the inner wall of the upper end of the cylinder body is provided with an annular containing groove, the annular containing groove is positioned below the pressure relief groove, and a pressing part formed between the annular containing groove and the pressure relief groove is in pressing contact with; the upper end face of the guide sleeve protrudes out of the upper end face of the cylinder body, when the guide sleeve is stressed and extruded to the upper end face of the guide sleeve, the upper end face of the cylinder body is flush, the guide sleeve moves downwards, the first sealing ring falls into the annular accommodating groove, the first sealing ring loses sealing performance, and high-pressure gas in the cylinder body is discharged along a gap between the cylinder body and the guide sleeve and the pressure relief groove. The bottom of the cylinder body is provided with an explosion-proof plug, and when the pressure in the cylinder body exceeds a set range value, the explosion-proof plug is broken to release the pressure.
Description
The technical field is as follows:
The utility model relates to an elastic element product technical field refers in particular to a nitrogen gas spring with excessive pressure overtravel protection safety.
background art:
With the continuous progress of science and technology, the demand of the industrial field for elastic elements is higher and higher, and the elastic elements are required to meet various requirements of mechanical structures and also to be miniaturized and have high performance.
the conventional elastic elements used in the prior art, such as springs, elastic rubber, air cushions and the like, generate elastic force which is increased in proportion to the increase of the compression amount and cannot keep constant pressure in the working process, the telescopic stroke is small, a lot of processes need constant elastic change, the conventional elastic elements bring great influence and limitation to the process design requirements, the process requirements cannot be met, the product quality and the efficiency are directly influenced, and the production cost is greatly improved.
The nitrogen spring in the prior art can solve the problems, at present, the nitrogen spring used in various industries in China is mainly imported, a die nitrogen spring (a stamping nitrogen spring or a nitrogen cylinder for short) is a novel elastic element using high-pressure nitrogen as a working medium, and the nitrogen spring has the advantages of small volume, large elasticity, long stroke, stable work, precise manufacture, long service life, mild elastic curve, no need of pre-tightening and the like, has the work which is difficult to complete by conventional elastic components such as a metal spring, rubber, an air cushion and the like, simplifies the design and manufacture of a die, is convenient to install and adjust the die, prolongs the service life of the die, ensures the stability of product quality, and is a new generation of optimal elastic component with flexibility.
The nitrogen spring in the prior art generally comprises a cylinder body, a guide sleeve fixedly arranged at the upper end of the cylinder body through a clamp spring, and a piston rod arranged in the cylinder body and penetrating through the guide sleeve, wherein a first O-shaped ring is sleeved on the periphery of the guide sleeve and is in sealing contact with the inner wall of the cylinder body; when the stress is removed, the piston rod is restored. The working cycle has no any safety protection measures, for example, external force continues to descend due to misoperation or machine failure, and the piston rod is forced to be extruded downwards in an overtravel way, so that the cylinder body is subjected to the external force, and the nitrogen spring is easily crushed; when the nitrogen spring is affected by factors such as temperature, the pressure in the cylinder body can be increased, and overpressure explosion can be easily caused. Both of the above conditions can cause the nitrogen spring to be damaged and be unusable, and the use safety risk exists.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
An object of the utility model is to overcome prior art not enough, provide a nitrogen gas spring with excessive pressure overtravel protection safety.
In order to solve the technical problem, the utility model discloses a following technical scheme: the nitrogen spring with the overpressure overtravel protection safety comprises a cylinder body, a guide sleeve fixedly arranged at the upper end of the cylinder body through a clamp spring, and a piston rod arranged in the cylinder body and penetrating through the guide sleeve, wherein a first sealing ring is sleeved on the periphery of the guide sleeve and is in sealing contact with the inner wall of the cylinder body, a first mounting groove for mounting the clamp spring is formed in the inner wall of the upper end of the cylinder body, and an explosion-proof plug is arranged at the bottom of the cylinder body; the inner wall of the upper end of the cylinder body is provided with a pressure relief groove penetrating through the upper end face of the cylinder body, the inner wall of the upper end of the cylinder body is also provided with an annular accommodating groove, the annular accommodating groove is positioned below the pressure relief groove, a pressing part is formed between the annular accommodating groove and the pressure relief groove, and the pressing part is in pressing contact with the first sealing ring; the upper end face of the guide sleeve protrudes out of the upper end face of the cylinder body, when the guide sleeve is stressed and extruded to the upper end face of the guide sleeve, the upper end face of the cylinder body is flush, the guide sleeve moves downwards, the first sealing ring falls into the annular accommodating groove, the first sealing ring loses sealing performance, and high-pressure gas in the cylinder body is discharged along a gap between the cylinder body and the guide sleeve and the pressure relief groove.
Furthermore, in the above technical scheme, the bottom of the cylinder body is provided with a through hole penetrating through the inner cavity of the cylinder body, and an explosion-proof plug is inserted into the through hole.
Further, in the above technical solution, the gap between the two ends of the clamp spring is communicated with the pressure relief groove.
Furthermore, in the above technical scheme, a groove is formed in the middle of the lower end of the piston rod in an upward direction, and the groove is communicated with an inner cavity of the cylinder body.
Further, in the above technical scheme, an outer dust ring is further arranged between the periphery of the guide sleeve and the inner wall of the cylinder body.
Furthermore, in the above technical scheme, a guide ring, an inner dust ring and a Y-shaped seal are arranged in the guide sleeve and located at the upper end and the lower end of the guide ring, and the piston rod penetrates through the guide ring and contacts with the inner dust ring and the Y-shaped seal.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: when the utility model is in the initial state, the piston rod is positioned at the uppermost part of the inner cavity of the cylinder body (namely the stroke top dead center); when external force acts on the piston rod, the piston rod moves downwards and moves to the lower part of the inner cavity of the cylinder body, and when the piston rod is at the maximum stroke bottom dead center, the external force cannot contact the guide sleeve, so that the guide sleeve cannot be caused to move. When misoperation or machine trouble, cause external force to continue down, force the piston rod overtravel extrusion downwards, simultaneously, the uide bushing also can receive exogenic action and move down, and uide bushing outlying first sealing washer falls into annular appearance groove, this first sealing washer lose sealing performance makes the inside high-pressure gas of cylinder body let out along the clearance between cylinder body and the uide bushing and let out in the groove, and this external force continues down, before the cylinder body atress (when contacting with the cylinder body promptly), high-pressure gas in the cylinder body lets out earlier, even reach the cylinder body and damage, can not take place the effect of explosion accident yet, reaches the safe purpose of journey protection, the order the utility model discloses extremely strong market competition has. The bottom of the cylinder body is provided with the explosion-proof plug, when the cylinder body is influenced by factors such as temperature and the like, the pressure in the cylinder body rises, and when the pressure exceeds the pressure value born by the thickness of the explosion-proof plug, the pressure plate in the middle of the explosion-proof plug is broken, so that the safety pressure relief effect is achieved, the cylinder body cannot be burst, and the overvoltage protection effect is achieved.
Description of the drawings:
Fig. 1 is a schematic structural diagram of the present invention;
Fig. 2 is a first usage state reference diagram of the present invention;
Fig. 3 is a second usage state reference diagram of the present invention;
FIG. 4 is an assembly view of the cylinder body and the clamp spring of the present invention;
fig. 5 is an exploded view of fig. 4.
the specific implementation mode is as follows:
The present invention will be further described with reference to the following specific embodiments and accompanying drawings.
As shown in fig. 1-5, the nitrogen spring with overpressure overtravel protection safety comprises a cylinder body 1, a guide sleeve 2 fixedly installed at the upper end of the cylinder body 1 through a snap spring 21, and a piston rod 3 installed in the cylinder body 1 and penetrating through the guide sleeve 2, wherein a first sealing ring 22 is sleeved on the periphery of the guide sleeve 2, the first sealing ring 22 is in sealing contact with the inner wall of the cylinder body 1, a first installation groove 11 for installing the snap spring 21 is formed in the inner wall of the upper end of the cylinder body 1, a pressure relief groove 12 penetrating through the upper end surface of the cylinder body 1 is formed in the inner wall of the upper end of the cylinder body 1, an annular accommodating groove 13 is further formed in the inner wall of the upper end of the cylinder body 1, the annular accommodating groove 13 is located below the pressure relief groove 12, a pressing portion 14 is formed between the annular accommodating groove 13 and the pressure relief groove 12, and the pressing portion 14; the upper end surface of the guide sleeve 2 protrudes out of the upper end surface of the cylinder body 1, when the guide sleeve 2 is stressed and extruded to the upper end surface of the guide sleeve 2, the upper end surface of the cylinder body 1 is flush, the guide sleeve 2 moves downwards, the first sealing ring 22 falls into the annular accommodating groove 13, the first sealing ring 22 loses sealing performance, and high-pressure gas in the cylinder body 1 is discharged along a gap between the cylinder body 1 and the guide sleeve 2 and the pressure relief groove 12. The utility model discloses when initial condition, this piston rod 3 is located the top most (stroke top dead center promptly) of 1 inner chamber 10 of cylinder body, as shown in fig. 1, acts on piston rod 3 as external force, and this piston rod 3 downstream to remove to the lower part of 1 inner chamber 10 of cylinder body, wherein, the biggest stroke bottom dead center of piston rod 3 is as shown in fig. 2, and at this moment, the uide bushing can not arouse in the external force contact, can not arouse the uide bushing displacement. When misoperation or machine trouble, cause external force to continue down, force the piston rod overtravel extrusion downwards, simultaneously, uide bushing 2 also can receive exogenic action and downstream, and uide bushing 2 outlying first sealing washer 22 falls into annular appearance groove 13, this first sealing washer 22 loses sealing performance, makes the inside high-pressure gas of cylinder body 1 let out along the clearance between cylinder body 1 and the uide bushing 2 and let out pressure release groove 12, and this external force continues down, before the cylinder body atress (when contacting with the cylinder body promptly), the high-pressure gas in the cylinder body lets out earlier, even reach the cylinder body damage, can not take place the effect of explosion accident yet, reach the purpose of journey protection safety, the order the utility model discloses extremely strong market competition has.
The bottom of the cylinder body 1 is provided with an explosion-proof plug 102, specifically, the bottom of the cylinder body 1 is provided with a through hole 101 penetrating through the inner cavity 10 of the cylinder body, and the explosion-proof plug 102 is inserted into the through hole 101. When the pressure in the cylinder body 1 rises due to the influence of factors such as temperature and the like and exceeds the pressure value born by the thickness of the explosion-proof plug, the pressure plate in the middle of the explosion-proof plug is broken, so that the safety pressure relief effect is achieved, the cylinder body cannot burst, and the overvoltage protection effect is achieved.
The interval 211 between the two ends of the clamp spring 21 is communicated with the pressure relief groove 12, so that the smoothness of pressure relief is ensured.
the middle part of the lower end of the piston rod 3 is upwards provided with a groove body 31, and the groove body 31 is communicated with the inner cavity 10 of the cylinder body 1.
An outer dustproof ring 23 is further arranged between the periphery of the guide sleeve 2 and the inner wall of the cylinder body 1. Be provided with guide ring 24 in the uide bushing 2 and be located interior dust ring 25 and the Y type of this guide ring 24 upper and lower both ends and seal 26, this guide ring 24 is worn to locate by piston rod 3 to seal 26 contact with interior dust ring 25 and Y type, guarantee sealing performance.
To sum up, the utility model discloses when initial condition, this piston rod 3 is located the top (stroke top dead center promptly) of 1 inner chamber 10 of cylinder body, as shown in fig. 1, acts on piston rod 3 as external force, and this piston rod 3 downstream to remove to the lower part of 1 inner chamber 10 of cylinder body, wherein, the biggest stroke bottom dead center of piston rod 3 is shown in fig. 2, and at this moment, the external force contact can not arouse the uide bushing displacement. When misoperation or machine trouble, cause external force to continue down, force the piston rod overtravel extrusion downwards, simultaneously, uide bushing 2 also can receive exogenic action and downstream, and uide bushing 2 outlying first sealing washer 22 falls into annular appearance groove 13, this first sealing washer 22 loses sealing performance, makes the inside high-pressure gas of cylinder body 1 let out along the clearance between cylinder body 1 and the uide bushing 2 and let out pressure release groove 12, and this external force continues down, before the cylinder body atress (when contacting with the cylinder body promptly), the high-pressure gas in the cylinder body lets out earlier, even reach the cylinder body damage, can not take place the effect of explosion accident yet, reach the purpose of journey protection safety, the order the utility model discloses extremely strong market competition has. The bottom of the cylinder body 1 is provided with the explosion-proof plug 102, when the cylinder body 1 is influenced by factors such as temperature and the like, the pressure in the cylinder body rises, and when the pressure exceeds the pressure value born by the thickness of the explosion-proof plug, a pressure plate in the middle of the explosion-proof plug is broken, so that the safety pressure relief effect is achieved, the cylinder body cannot be burst, and the overvoltage protection effect is achieved.
of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. A nitrogen spring with overpressure overtravel protection safety comprises a cylinder body (1), a guide sleeve (2) fixedly installed at the upper end of the cylinder body (1) through a clamp spring (21), and a piston rod (3) installed in the cylinder body (1) and penetrating through the guide sleeve (2), wherein a first sealing ring (22) is sleeved on the periphery of the guide sleeve (2), the first sealing ring (22) is in sealing contact with the inner wall of the cylinder body (1), a first installation groove (11) for installing the clamp spring (21) is formed in the inner wall of the upper end of the cylinder body (1),
The method is characterized in that: the bottom of the cylinder body (1) is provided with an explosion-proof plug (102); the inner wall of the upper end of the cylinder body (1) is provided with a pressure relief groove (12) penetrating through the upper end face of the cylinder body, the inner wall of the upper end of the cylinder body (1) is also provided with an annular accommodating groove (13), the annular accommodating groove (13) is positioned below the pressure relief groove (12), a pressing part (14) is formed between the annular accommodating groove (13) and the pressure relief groove (12), and the pressing part (14) is in pressing contact with a first sealing ring (22); the upper end face of the guide sleeve (2) protrudes out of the upper end face of the cylinder body (1), when the guide sleeve (2) is stressed and extruded to the upper end face of the guide sleeve (2) and the upper end face of the cylinder body (1) is level, the guide sleeve (2) moves downwards, the first sealing ring (22) falls into the annular accommodating groove (13), the first sealing ring (22) loses sealing performance, and high-pressure gas inside the cylinder body (1) is discharged out along a gap between the cylinder body (1) and the guide sleeve (2) and the pressure relief groove (12).
2. the nitrogen spring with overpressure overtravel protection safety as claimed in claim 1, wherein: the bottom of the cylinder body (1) is provided with a through hole (101) penetrating through an inner cavity (10) of the cylinder body, and the explosion-proof plug (102) is inserted into the through hole (101).
3. The nitrogen spring with overpressure overtravel protection safety as claimed in claim 1, wherein: and the interval (211) between the two ends of the clamp spring (21) is communicated with the pressure relief groove (12).
4. A nitrogen spring with overpressure overtravel protection safety as claimed in any one of claims 1-3 wherein: the middle part of the lower end of the piston rod (3) is upwards provided with a groove body (31), and the groove body (31) is communicated with an inner cavity (10) of the cylinder body (1).
5. A nitrogen spring with overpressure overtravel protection safety as claimed in any one of claims 1-3 wherein: an outer dustproof ring (23) is further arranged between the periphery of the guide sleeve (2) and the inner wall of the cylinder body (1).
6. The nitrogen spring with overpressure overtravel protection safety of claim 5, wherein: be provided with guide ring (24) in uide bushing (2) and be located interior dust ring (25) and the Y type seal (26) of both ends about this guide ring (24), this guide ring (24) is worn to locate in piston rod (3) to seal (26) contact with interior dust ring (25) and Y type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083615.3U CN209762107U (en) | 2019-01-17 | 2019-01-17 | Nitrogen spring with overvoltage overtravel protection safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083615.3U CN209762107U (en) | 2019-01-17 | 2019-01-17 | Nitrogen spring with overvoltage overtravel protection safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209762107U true CN209762107U (en) | 2019-12-10 |
Family
ID=68749515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920083615.3U Active CN209762107U (en) | 2019-01-17 | 2019-01-17 | Nitrogen spring with overvoltage overtravel protection safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209762107U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222418A1 (en) * | 2021-04-21 | 2022-10-27 | 嘉兴迈特尔宝欣机械工业有限公司 | Nitrogen spring |
-
2019
- 2019-01-17 CN CN201920083615.3U patent/CN209762107U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222418A1 (en) * | 2021-04-21 | 2022-10-27 | 嘉兴迈特尔宝欣机械工业有限公司 | Nitrogen spring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209762107U (en) | Nitrogen spring with overvoltage overtravel protection safety | |
| CN208457091U (en) | A kind of overvoltage protection nitrogen gas spring | |
| CN201801346U (en) | Novel hydraulic jack | |
| CN201434036Y (en) | Nitrogen spring for stamping mold | |
| CN212004068U (en) | Nitrogen spring with explosion-proof type bush | |
| CN110202064A (en) | A kind of mould structure improving molding rate and the protection of mold double-sheet | |
| CN213479022U (en) | Nitrogen spring of balance cylinder | |
| CN212389682U (en) | Nitrogen spring with overspeed protection safety | |
| CN212407411U (en) | Piston type nitrogen spring with over-stroke safety protection function | |
| CN110873142A (en) | Novel return stroke self-decelerating nitrogen spring for inhibiting rebound of pressure plate | |
| CN212004069U (en) | Safe explosion-proof nitrogen spring | |
| CN210397549U (en) | Jacket type super-strong nitrogen spring | |
| CN216842841U (en) | Novel nitrogen spring of high leakproofness | |
| CN211202717U (en) | Nitrogen spring plunger rod protection structure | |
| CN212004070U (en) | Nitrogen spring with explosion-proof air-leakage piston rod | |
| CN213176604U (en) | Explosion-proof screw for nitrogen spring | |
| CN218991850U (en) | Piston pump inner plug sealing improved structure | |
| CN215470512U (en) | Grinding wheel housing stamping part with high compressive property for grinding wheel machine | |
| CN214888556U (en) | Zero-resilience controllable time-delay nitrogen spring set | |
| CN214998100U (en) | Sealing device for gas compressor | |
| CN212672294U (en) | Nitrogen spring that superpressure was reported to police | |
| CN211231392U (en) | Novel return stroke self-decelerating nitrogen spring for inhibiting rebound of pressure plate | |
| CN217271627U (en) | Nitrogen spring with overload protection function | |
| CN213943071U (en) | Synthetic reation kettle explosion-proof equipment of antioxygen 3114 | |
| CN215057847U (en) | Oil inlet pressure limiting assembly for common rail high-pressure oil pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |