Nitrogen spring protection structure

Abstract

The utility model discloses a nitrogen spring protection structure and relates to the technical field of nitrogen springs, a rupture disk is arranged in a bottom sealing sleeve, a puncture pressure relief assembly which penetrates through a lining cylinder and is vertically opposite to the rupture disk is arranged at the bottom end of a plunger rod, and a protection sleeve for covering the rupture disk is arranged at the bottom of the bottom sealing sleeve. According to the design, the rupture disk serves as an overpressure protection structure, in the daily compression process of the plunger type cylinder and the plunger rod, when the compression stroke exceeds the load, the plunger rod drives the puncture pressure relief assembly to puncture the rupture disk, overload high pressure is relieved through the punctured rupture disk, meanwhile, the rupture disk has the good sealing characteristic, and the service life of the rupture disk is prolonged. Under the protection of a daily cover of the protective sleeve, the situation of pressure relief caused by mistaken touch due to external factors can be effectively avoided, and when the puncture pressure relief assembly conducts daily telescopic braking along with the plunger rod, the inner sealing plunger on the brake rod of the puncture pressure relief assembly can conduct synchronous telescopic braking along the lining cylinder, and the function of assisting nitrogen compression is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogen spring field especially relates to a nitrogen spring protection structure. BACKGROUND

[0002] Nitrogen spring because its unique performance, in many need elastic support or buffer occasion, such as mould industry, automobile industry, electronic industry etc. Wide application, and nitrogen spring in the use process, because its compression stroke is limited, therefore usually need to set overpressure protection structure in nitrogen spring, to improve the self -protection ability of nitrogen spring, such as the nitrogen spring overpressure protection structure (disclosed announcement number CN220566477U) shown in Chinese patent network, when nitrogen is compressed, nitrogen passes through the through -hole, compresses to the below of pressure plate, when continuously compressing, makes the damper to slow down and block down pressure, and the pressure plate moves down, drives the pressure column to press down, makes the sealing plate separate from the pressure relief hole, further can relieve the pressure in the interior, also ensures that nitrogen spring does not damage because of pressure too big and so on.

[0003] However, the nitrogen spring protection structure adopted by the above-mentioned disclosed patent and the existing market still has some deficiencies: the existing nitrogen spring overloading pressure relief mode by borrowing mechanical sealing components has poor mechanical self-sealing stability, and is prone to move due to external bumps, internal pressure impact, resulting in leakage of high-pressure gas in the nitrogen spring and poor compression braking effect. Therefore, the technical personnel in the art provide a nitrogen spring protection structure to solve the problems raised in the above background art. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a nitrogen spring protection structure, which solves the problem of poor daily self-sealing of the existing nitrogen spring protection structure raised in the above background art.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a nitrogen spring protection structure, comprising a plunger cylinder and a plunger rod compressed and braked along the cylinder body direction of the plunger cylinder;

[0006] The bottom of the plunger cylinder is provided with a bottom sealing sleeve, and the inside of the bottom sealing sleeve is provided with a bursting membrane;

[0007] The inside of the cylinder body of the plunger cylinder is provided with an inner lining cylinder, and the bottom end of the plunger rod is provided with a puncture pressure relief assembly penetrating the inner lining cylinder and vertically opposite to the bursting membrane;

[0008] The bottom of the bottom sealing sleeve is provided with a protective sleeve covering the bursting membrane.

[0009] As a further technical scheme of the utility model: the puncture pressure relief assembly includes brake lever on the plunger rod along the liner cylinder body direction, the brake lever's axle rod is equipped with the inner sealing plunger that adapts to the liner cylinder, and the brake lever's axle rod bottom is equipped with the puncture head opposite to the burst film.

[0010] As a further technical scheme of the utility model: the brake lever's axle rod top is equipped with the limit ring, and the limit ring is pressed in the liner cylinder.

[0011] As a further technical scheme of the utility model: the protective sleeve is hollow structure, and the protective sleeve is equipped with not less than a group of pressure relief holes along its circumference.

[0012] As a further technical scheme of the utility model: the liner cylinder is the through pipe structure, and the cylinder bottom of the liner cylinder is equipped with the support rib connected with the plunger cylinder fixedly.

[0013] As a further technical scheme of the utility model: the sleeve mouth of the bottom sealing sleeve is equipped with the internal thread sleeve, the cylinder body bottom of the plunger cylinder is equipped with the external thread sleeve, and the internal thread sleeve and the external thread sleeve are adapted by being screwed with each other.

[0014] The nitrogen gas spring protection structure provided by the utility model has the following beneficial effects compared with the prior art:

[0015] The nitrogen gas spring protection structure of the design is based on the burst film as the overpressure protection structure, in the daily compression process of the plunger cylinder and the plunger rod, when the compression stroke exceeds the load, the plunger rod drives the puncture pressure relief assembly to pierce the burst film, and the overload high pressure is discharged through the pierced burst film, meanwhile, the burst film itself has good sealing properties, and under the daily cover protection of the protective sleeve, the burst film can effectively avoid the mis-touching discharge caused by external factors, and when the puncture pressure relief assembly is braked with the daily expansion and contraction of the plunger rod, the inner sealing plunger on the brake lever can be braked with the synchronous expansion and contraction of the liner cylinder, which plays the auxiliary nitrogen compression function and further improves the compression and braking stability of the nitrogen gas spring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of a nitrogen gas spring protection structure;

[0017] Figure 2 It is the first sectional view of a nitrogen gas spring protection structure;

[0018] Figure 3 It is the second sectional view of a nitrogen gas spring protection structure;

[0019] Figure 4 It is a plane schematic view of a nitrogen gas spring protection structure;

[0020] Figure 5It is a structure diagram of a puncture pressure relief component in a nitrogen spring protection structure.

[0021] Figure 6 It is a structure diagram of an inner lining cylinder in a nitrogen spring protection structure.

[0022] Figure 7 It is a structure diagram of a protective sleeve in a nitrogen spring protection structure.

[0023] Figure 8 It is a partial sectional view of a protective sleeve in a nitrogen spring protection structure.

[0024] In the figure: 1, plunger cylinder; 11, outer threaded sleeve; 2, plunger rod; 3, bottom sealing sleeve; 31, inner threaded sleeve; 4, protective sleeve; 5, pressure relief hole; 6, inner lining cylinder; 61, support rib; 7, puncture pressure relief component; 71, brake rod; 72, inner sealing plunger; 73, puncture head; 74, limiting ring; 8, bursting membrane. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Please refer to Figures 1-8 The present application provides a nitrogen spring protection structure technical scheme: a nitrogen spring protection structure, comprising a plunger cylinder 1 and a plunger rod 2 compressed and braked along the cylinder body direction of the plunger cylinder 1, the cylinder body of the plunger cylinder 1 is provided with an inner lining cylinder 6, the inner lining cylinder 6 is a through pipe structure, and the cylinder bottom of the inner lining cylinder 6 is provided with a support rib 61 fixedly connected with the plunger cylinder 1. Through the arrangement of the inner lining cylinder 6, on the one hand, it plays an auxiliary role in compression braking with the inner sealing plunger 72, and on the other hand, it plays a supporting and guiding function, so as to improve the stability of the plunger rod 2 in daily compression braking.

[0027] The bottom end of the plunger rod 2 is provided with a puncture pressure relief assembly 7 penetrating through the inner liner cylinder 6 and vertically opposite to the burst membrane 8, the puncture pressure relief assembly 7 comprises a brake rod 71 provided on the plunger rod 2 along the cylinder body direction of the inner liner cylinder 6, the shaft rod of the brake rod 71 is provided with an inner sealing plunger 72 matched with the inner liner cylinder 6, and the bottom end of the shaft rod of the brake rod 71 is provided with a puncture head 73 opposite to the burst membrane 8, through the synchronous extension and contraction brake of the brake rod 71 along with the plunger rod 2, on the one hand, the inner sealing plunger 72 is driven to extend and contract along the inner liner cylinder 6, thereby assisting the nitrogen gas compression function, improving the compression load capacity of the nitrogen gas spring, and on the other hand, the puncture head 73 is driven to synchronously extend and contract, and when the compression brake stroke of the plunger rod 2 is overloaded, the puncture head 73 is driven to puncture the burst membrane 8, the burst membrane 8 is punctured, the overload high pressure is synchronously relieved, and the overpressure protection is realized.

[0028] The top end of the shaft rod of the brake rod 71 is provided with a limiting ring 74, and the limiting ring 74 is pressed against the inner liner cylinder 6, through the limiting ring 74 arranged on the top end of the brake rod 71, the stroke of the plunger rod 2 is limited, and through pressing the limiting ring 74 against the inner liner cylinder 6, the plunger rod 2 is positioned, and the nitrogen gas spring after pressure relief is prevented from being continuously compressed.

[0029] The bottom of the bottom sealing sleeve 3 is provided with a protective sleeve 4 covering the burst membrane 8, the protective sleeve 4 is a hollow structure, and a plurality of pressure relief holes 5 are formed in the circumferential direction of the protective sleeve 4, through the arrangement of the protective sleeve 4, the burst membrane 8 is protected, the burst membrane 8 is prevented from being punctured by sharp objects in the external environment, the burst membrane 8 has good sealing properties, the pressure relief condition is effectively avoided, and the high pressure after pressure relief is discharged through the pressure relief holes 5 of the protective sleeve 4, so that the pressure impact is reduced.

[0030] The sleeve opening of the bottom sealing sleeve 3 is provided with an internal thread sleeve 31, the bottom of the cylinder body of the plunger cylinder 1 is provided with an external thread sleeve 11, and the internal thread sleeve 31 and the external thread sleeve 11 are screw-connected and matched with each other, through the screw connection of the internal thread sleeve 31 and the external thread sleeve 11, the bottom sealing sleeve 3 and the plunger cylinder 1 are fixedly connected, when the nitrogen gas spring is overloaded and pressure relieved, the bottom sealing sleeve 3 is only needed to be removed, a new burst membrane 8 is replaced, and the nitrogen gas is filled again, so that the nitrogen gas spring can be used again, and the whole device does not need to be disassembled and maintained, so that the maintenance is simpler and the cost is lower.

[0031] The working principle of the utility model is as follows: in the process of daily compression brake of the nitrogen gas spring, the plunger rod 2 is compressed and braked along the plunger cylinder 1, and at the same time of the daily compression brake of the plunger rod 2, the brake rod 71 is synchronously braked, the inner sealing plunger 72 on the shaft rod of the brake rod 71 is driven to extend and contract along the inner liner cylinder 6, thereby assisting the nitrogen gas compression function;

[0032] When the plunger rod 2 compresses the brake stroke beyond the load pressure, the piercing head 73 is driven by the brake rod 71 to pierce the burst membrane 8, and the overpressure protection is achieved by synchronously relieving the overpressure high pressure. After the relief, the nitrogen gas spring no longer has the elastic compression characteristic, and the plunger rod 2 is continuously pressed while the upper end limiting ring 74 of the brake rod 71 is in contact with the inward lining cylinder 6 to limit the stroke of the plunger rod 2, avoiding the continuous compression of the nitrogen gas spring after the relief.

[0033] The above is only the preferred embodiment of the utility model, it should be pointed out that, for ordinary technical personnel in this technical field, without departing from the principle of the utility model, can also make a number of improvements and refinements, these improvements and refinements should also be considered the protection scope of the utility model. The structure, device and operation method not specifically described and explained in the utility model, such as no special description and limitation, are implemented according to the conventional means in the field.

Claims

1. A nitrogen gas spring protection structure characterized by comprising: The application relates to a plunger cylinder (1) and a plunger rod (2) compressed in the cylinder body direction of the plunger cylinder (1); The bottom of the plunger cylinder (1) is provided with a bottom sealing sleeve (3), and the inside of the bottom sealing sleeve (3) is provided with a burst membrane (8); The inside of the cylinder body of the plunger cylinder (1) is provided with an inner lining cylinder (6), and the bottom end of the plunger rod (2) is provided with a puncture pressure relief assembly (7) penetrating through the inner lining cylinder (6) and vertically opposite to the burst membrane (8); The bottom of the bottom sealing sleeve (3) is provided with a protective sleeve (4) covering the burst membrane (8).

2. The nitrogen gas spring protection structure according to claim 1, wherein The puncture pressure relief assembly (7) comprises a brake rod (71) arranged on the plunger rod (2) in the cylinder body direction of the inner lining cylinder (6), the shaft rod of the brake rod (71) is provided with an inner sealing plunger (72) matched with the inner lining cylinder (6), and the bottom end of the shaft rod of the brake rod (71) is provided with a puncture head (73) opposite to the burst membrane (8).

3. The nitrogen gas spring protection structure according to claim 2, wherein The top end of the shaft rod of the brake rod (71) is provided with a limiting ring (74), and the limiting ring (74) is pressed against the inner lining cylinder (6).

4. The nitrogen gas spring protection structure according to claim 1, wherein The protective sleeve (4) is a hollow structure, and a plurality of pressure relief holes (5) are arranged on the circumference of the protective sleeve (4).

5. The nitrogen gas spring protection structure according to claim 1, wherein The inner lining cylinder (6) is a through pipe structure, and the bottom of the inner lining cylinder (6) is provided with a supporting rib (61) fixedly connected with the plunger cylinder (1).

6. The nitrogen gas spring protection structure according to claim 1, wherein The sleeve opening of the bottom sealing sleeve (3) is provided with an inner threaded sleeve (31), the bottom of the cylinder body of the plunger cylinder (1) is provided with an outer threaded sleeve (11), and the inner threaded sleeve (31) and the outer threaded sleeve (11) are screw-connected and matched with each other.

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