CN219221129U

CN219221129U - Nitrogen spring structure with overpressure protection

Info

Publication number: CN219221129U
Application number: CN202320270490.1U
Authority: CN
Inventors: 钟海枫; 孟振生
Original assignee: Dake Guangdong Precision Technology Co ltd
Current assignee: Dake Guangdong Precision Technology Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-20
Anticipated expiration: 2033-02-21

Abstract

The utility model relates to the technical field of nitrogen springs, in particular to a nitrogen spring structure with overpressure protection, which comprises a cylinder barrel, a guide sleeve connected inside the cylinder barrel and a plunger slidingly connected inside the guide sleeve; the outer side wall of the guide sleeve is provided with a groove which can be embedded into the sealing ring; a baffle ring is arranged in the groove at one side of the sealing ring away from the bottom of the cylinder barrel; at least one position on the baffle ring is provided with a fracture zone; the fracture zone has a lower compression resistance than the rest of the ring. When the utility model is used, the belt is broken at the position of the baffle ring in the structure to form a break when the baffle ring is pressed, and the pressure generated by the broken belt is judged to be deflated by the air pressure in the nitrogen spring, so that the deflation time is more accurate, and the risk of cylinder barrel breakage is more effectively reduced.

Description

Nitrogen spring structure with overpressure protection

Technical Field

The utility model relates to the technical field of nitrogen springs, in particular to a nitrogen spring structure with overpressure protection.

Background

The nitrogen spring is a novel elastic component using high-pressure nitrogen as working medium, and has the advantages of small volume, large elasticity, long stroke, stable operation, precise manufacture, long service life, smooth elastic curve, no need of pre-tightening and the like. In order to ensure the use safety of the nitrogen spring, the utility model is named as an automatic pressure relief nitrogen spring for overtravel use as in application 201720988579.6, and the nitrogen spring mainly comprises a cylinder body, a middle sleeve, a piston rod and a pressure relief valve; the pressure relief valve is fixedly arranged at the bottom of the cylinder body through base threads; in the using process of the nitrogen spring capable of automatically relieving pressure on the way of the foot, the pressure relieving condition requires a piston rod to directly act on a pressure relieving valve; the condition of the pressure relief must be such that the piston rod is pushed to the bottom. That is, the pressure relief condition is not to relieve pressure according to the pressure value inside the cylinder barrel, but only in the over-travel environment. Therefore, the nitrogen spring with pressure relief can generate a phenomenon that the piston rod still does not trigger the pressure relief valve even if the pressure in the cylinder reaches a high pressure value; the pressure release condition inside the cylinder is not judged according to the pressure inside the cylinder, and the risk of cracking the cylinder due to high pressure is difficult to be effectively reduced.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings of the prior art and provides a nitrogen spring structure with overpressure protection.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model relates to a nitrogen spring structure with overpressure protection, which comprises a cylinder barrel, a guide sleeve connected in the cylinder barrel and a plunger slidingly connected in the guide sleeve, wherein the guide sleeve is provided with a guide sleeve;

the outer side wall of the guide sleeve is provided with a groove capable of being embedded into the sealing ring; a baffle ring is arranged in the groove at one side of the sealing ring away from the bottom of the cylinder barrel; at least one position fracture belt is arranged on the baffle ring; the fracture zone has a lower compression resistance than the rest of the ring.

Further, the baffle ring is provided with a concave at a side far from the sealing ring, and the baffle ring forms a rupture zone at the concave position.

Further, the concave shape is a strip shape along the circumferential direction of the guide sleeve.

Further, a guide sleeve is provided with an avoidance groove at one side of the baffle ring far away from the sealing ring; the avoidance groove is arranged at a position opposite to the fracture belt.

Further, the cylinder barrel and the guide sleeve are clamped and fixed through the clamp spring.

Further, a plunger limiting ring is arranged at the bottom of the plunger; a guide sleeve limiting ring which is opposite to the plunger limiting ring is arranged in the guide sleeve.

After the structure is adopted, the utility model has the beneficial effects that: according to the nitrogen spring structure with overpressure protection, when the nitrogen spring structure is used, the sealing ring is sleeved into the groove and is used for sealing a gap between the cylinder barrel and the guide sleeve; in the use process, the pressure of the sealing ring is increased along with the increase of the pressure in the cylinder barrel, when the pressure is increased to a certain pressure, the pressure of the sealing ring to the baffle ring is also increased, and at a certain pressure value, the pressure of the sealing ring to the rupture zone is larger than the compressive strength of the rupture zone, so that the rupture zone is torn, after the rupture zone is torn and broken, the sealing ring is deformed at the position of the rupture zone due to the pressure in the cylinder barrel, so that an air leakage point is generated, and the air in the cylinder barrel is discharged from the deformed position of the sealing ring, so that the air pressure in the nitrogen spring is reduced; the pressure generated by the fracture zone is judged by the internal air pressure of the nitrogen spring, so that the time of deflation is more accurate, and the risk of cylinder barrel fracture is reduced more effectively.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a block diagram of the plunger stop collar of the present utility model in a disengaged condition;

FIG. 3 is a block diagram of the connection of the plunger to the guide sleeve;

FIG. 4 is a perspective view of the guide sleeve;

reference numerals illustrate:

1. a plunger; 101. plunger limiting rings; 2. a guide sleeve; 201. avoiding the groove; 202. a baffle ring;

202a, concave; 203. a guide sleeve limiting ring; 3. a seal ring; 4. a cylinder; 5. and (5) clamping springs.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the nitrogen spring structure with overpressure protection according to the present utility model comprises a cylinder 4, a guide sleeve 2 connected to the inside of the cylinder 4, and a plunger 1 slidably connected to the inside of the guide sleeve 2;

the outer side wall of the guide sleeve 2 is provided with a groove which can be embedded into the sealing ring 3; a baffle ring 202 is arranged in the groove at one side of the sealing ring 3 away from the bottom of the cylinder barrel 4; at least one position on the baffle ring 202 breaks the belt; the fracture zone has a lower resistance to compression than the rest of the ring 202;

the sealing ring 3 is sleeved into the groove and is used for sealing a gap between the cylinder barrel 4 and the guide sleeve 2; in the use process, along with the increase of the pressure in the cylinder 4, the pressure born by the sealing ring 3 is also increased, when the pressure is increased to a certain pressure, the pressure of the sealing ring 3 to the baffle ring 202 is also increased, and at a certain pressure value, the pressure of the sealing ring 3 to the rupture zone is larger than the compressive strength of the rupture zone, so that the rupture zone is torn, after the rupture zone is torn and broken, the sealing ring 3 deforms at the position of the rupture zone due to the pressure in the cylinder 4, so that a gas leakage point is generated, and the gas in the cylinder 4 is discharged from the deformed position of the sealing ring 3, so that the pressure in the nitrogen spring is reduced; in this structure, through breaking the area in baffle ring 202 position department, form the break when baffle ring 202 is pressed, the inside atmospheric pressure of nitrogen gas spring judges the time of gassing to the pressure that breaks the area and produce, the time of gassing, it is more accurate, reduce the risk that the cylinder breaks more effectively.

As a preferable mode of the present utility model, the baffle ring 202 is provided with a concave shape 202a at a side far from the sealing ring 3, and the baffle ring 202 forms a rupture zone at the position of the concave shape 202 a; by providing the concave shape 202a such that the pressure resistance of the stopper ring 202 is reduced at the position of the concave shape 202a, a broken band of the stopper ring 202 is formed.

As a preferable mode of the present utility model, the concave shape 202a is a long strip shape along the circumferential direction of the guide sleeve 2; the elongated concave shape 202a reduces the bending resistance of the middle position of the concave shape 202a, so that the rupture zone is smoothly ruptured in a high pressure state.

As a preferred mode of the utility model, the guide sleeve 2 is provided with an avoidance groove 201 at one side of the baffle ring 202 away from the sealing ring 3; the avoiding groove 201 is arranged at a position opposite to the fracture belt;

by providing a relief for the rupture zone to rupture and open outwardly by the relief groove 201, the rupture zone is not blocked when it ruptures outwardly, allowing sufficient room for deformation of the seal ring 3 at the location of the rupture zone.

As a preferable mode of the utility model, the cylinder barrel 4 and the guide sleeve 2 are clamped and fixed through the clamp spring 5; the cylinder barrel 4 is internally provided with a concave ring for installing the clamp spring 5, and the guide sleeve 2 is provided with a convex ring clamped at the inner ring of the clamp spring 5; the clamping and fixing mode of the clamp spring 5 is convenient for dismounting the guide sleeve 2 from the cylinder barrel 4 after the broken belt of the guide sleeve is broken.

As shown in fig. 2, as a preferred mode of the present utility model, the bottom of the plunger 1 is provided with a plunger stopper 101; a guide sleeve limiting ring 203 which is opposite to the plunger limiting ring 101 is arranged in the guide sleeve 2; the plunger rod repeatedly impacts with the guide sleeve every time when the die is used, and the service life of the nitrogen spring is 100 ten thousand times or more generally, but special situations in the process are not excluded.

The impact force is relatively smaller when the normal nitrogen spring plunger rod returns along with the punch press, but the impact force blocked and pried is much larger when the normal nitrogen spring plunger rod returns along with the punch press, because the return speed of the punch press is relatively slow, but the impact force is much larger when the nitrogen spring is pried, which is equivalent to the free opening of the nitrogen spring, so that the impact force during pried is buffered, after the impact between the guide sleeve limiting ring 203 and the plunger limiting ring 101, the plunger limiting ring 101 is separated from the plunger 1 due to impact, and the plunger limiting ring 101 has a buffering effect on the plunger 1 in the breaking process, so that the impact force of the plunger 1 is reduced.

When the utility model is used, the sealing ring is sleeved into the groove and is used for sealing the gap between the cylinder barrel and the guide sleeve; in the use process, the pressure of the sealing ring is increased along with the increase of the pressure in the cylinder barrel, when the pressure is increased to a certain pressure, the pressure of the sealing ring to the baffle ring is also increased, and at a certain pressure value, the concave pressure of the sealing ring to the baffle ring is larger than the compressive strength of the rupture belt, so that the rupture belt is torn outwards, after the rupture belt is torn and broken, the sealing ring deforms at the position of the rupture belt due to the pressure in the cylinder barrel, so that an air leakage point is generated, and the air in the cylinder barrel is discharged from the deformed position of the sealing ring, so that the air pressure in the nitrogen spring is reduced; in the structure, the band is broken at the position of the baffle ring to form a break when the baffle ring is pressed, the pressure generated by the broken band is judged to be deflated by the air pressure in the nitrogen spring, and the deflation time is more accurate and the risk of cylinder barrel breakage is more effectively reduced; the clamping and fixing mode of the clamp spring is convenient for dismounting the guide sleeve from the cylinder barrel after the broken belt of the guide sleeve is broken; after collision of the guide sleeve limiting ring and the plunger limiting ring, the plunger limiting ring is separated from the plunger due to impact, and the plunger limiting ring has a buffering effect on the plunger in the breaking process, so that the impact force of the plunger is reduced.

The foregoing description is only of the preferred embodiments of the utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.

Claims

1. The nitrogen spring structure with the overpressure protection comprises a cylinder barrel (4), a guide sleeve (2) connected inside the cylinder barrel (4) and a plunger (1) connected in the guide sleeve (2) in a sliding way;

the method is characterized in that: the outer side wall of the guide sleeve (2) is provided with a groove which can be embedded into the sealing ring (3); a baffle ring (202) is arranged in the groove at one side of the sealing ring (3) away from the bottom of the cylinder barrel (4); at least one position on the baffle ring (202) is provided with a fracture zone; the fracture zone has a lower compression resistance than the rest of the ring (202).

2. A nitrogen spring structure with overpressure protection according to claim 1, characterized in that:

the baffle ring (202) is provided with a concave shape (202 a) at one side far away from the sealing ring (3), and the baffle ring (202) forms a rupture zone at the position of the concave shape (202 a).

3. A nitrogen spring structure with overpressure protection according to claim 2, characterized in that: the concave shape (202 a) is a strip shape along the circumferential direction of the guide sleeve (2).

4. A nitrogen spring structure with overpressure protection according to claim 1, characterized in that: the guide sleeve (2) is provided with an avoidance groove (201) at one side of the baffle ring (202) far away from the sealing ring (3); the avoidance groove (201) is arranged at a position opposite to the fracture belt.

5. A nitrogen spring structure with overpressure protection according to claim 1, characterized in that: the cylinder barrel (4) and the guide sleeve (2) are clamped and fixed through a clamp spring (5).

6. A nitrogen spring structure with overpressure protection according to claim 1, characterized in that: a plunger limiting ring (101) is arranged at the bottom of the plunger (1); a guide sleeve limiting ring (203) which is opposite to the plunger limiting ring (101) is arranged in the guide sleeve (2).