CN220566194U

CN220566194U - High-pressure piston and cylinder

Info

Publication number: CN220566194U
Application number: CN202321778398.2U
Authority: CN
Inventors: 高杨清; 高雪峰; 苏明明
Original assignee: NANTONG GUANGXING PNEUMATIC EQUIPMENT CO Ltd
Current assignee: NANTONG GUANGXING PNEUMATIC EQUIPMENT CO Ltd
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2024-03-08
Anticipated expiration: 2033-07-07

Abstract

The utility model provides a high-pressure piston and a cylinder, and belongs to the technical field of cylinders; the high-pressure piston comprises a piston rod and a piston head, wherein a gas channel is formed in the piston head, a one-way valve for one-way ventilation is arranged at the tail end of the piston head, the one-way valve comprises a valve body, the valve body is detachably connected with the piston head, a valve body channel which can be communicated with the gas channel is formed in the valve body, and a blocking piece for blocking the valve body channel from the outer side of the piston head is arranged on the valve body; the technical problems that in the prior art, the efficiency is low and gas is wasted when gas is compressed due to the fact that a gas storage space exists at the tail end of a high-pressure piston are solved.

Description

High-pressure piston and cylinder

Technical Field

The utility model belongs to the technical field of air cylinders, and particularly relates to a high-pressure piston and an air cylinder.

Background

The patent of the utility model in China is CN111664071A, which discloses a parallel double-connecting rod secondary high-sealing high-pressure pump, wherein a piston cylinder of the high-pressure pump comprises a primary cylinder and a secondary cylinder which are arranged up and down, a high-pressure piston is arranged in the secondary cylinder, and a third one-way valve is arranged at the tail end of the high-pressure piston and used for preventing gas from flowing back to the primary cylinder when the gas in the secondary cylinder is compressed.

In the above patent document, the third check valve is provided with a spring at one end thereof near the check valve passage (i.e., the valve body passage) in the installation space for installing the block piece, and when the block piece blocks the passage on the high pressure piston, the check valve passage and the installation spring together form a certain gas storage space, and the existence of the gas storage space increases the whole volume of compressed gas in the secondary cylinder, reduces the compression efficiency, and causes gas waste.

Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.

Disclosure of Invention

The utility model aims to provide a high-pressure piston, which solves the technical problems that the efficiency is low and gas is wasted when gas is compressed due to the existence of a gas storage space at the tail end of the high-pressure piston in the prior art; the utility model also provides a cylinder to solve the same technical problems.

In order to achieve the above object, the high-pressure piston of the present utility model provides the following technical solutions:

the high-pressure piston comprises a piston rod and a piston head, wherein a gas channel is formed in the piston head, a one-way valve for one-way ventilation is arranged at the tail end of the piston head, the one-way valve comprises a valve body, the valve body is detachably connected with the piston head, a valve body channel which can be communicated with the gas channel is formed in the valve body, and a blocking piece for blocking the valve body channel from the outer side of the piston head is arranged on the valve body.

As a further optimized technical scheme: the plugging piece comprises a limiting part and a plugging part which are integrally connected, the diameter of the plugging part is not smaller than that of the valve body channel, the limiting part and the plugging part are arranged on two sides of the valve body channel, and the plugging part is arranged on the outer side of the piston head.

As a further optimized technical scheme: the valve body is provided with a limiting groove communicated with the valve body channel, and the shape of the limiting groove is matched with the plugging part.

As a further optimized technical scheme: the limiting groove is funnel-shaped with a large opening facing to the outer side.

As a further optimized technical scheme: the check valve is internally provided with a limit spring, one end of the limit spring is fixedly connected with the plugging piece, and the other end of the limit spring is fixedly connected with the valve body.

As a further optimized technical scheme: the end of the plugging piece is provided with a stop piece, and the limiting spring is fixedly connected with the plugging piece through the stop piece.

As a further optimized technical scheme: the limiting spring is conical, and one end of the small diameter of the limiting spring is fixedly connected with the plugging piece.

As a further optimized technical scheme: the piston head is provided with a plug body and a connecting part which are integrally connected, the connecting part is detachably connected with the piston rod, a primary sealing structure formed by a plurality of sealing rings is arranged on the outer side of the plug body, a secondary sealing structure formed by an elastic piece, a conical pad, a high-pressure sealing cylinder and a high-pressure supporting pad which are sequentially compressed is arranged on the outer side of the connecting part, and the primary sealing structure and the secondary sealing structure are respectively used for being in sealing connection with a cylinder body on the outer side of the high-pressure piston.

As a further optimized technical scheme: the high-pressure support pad is provided with the holding tank towards one side of high-pressure sealing cylinder, the holding tank looks adaptation with the terminal surface of high-pressure sealing cylinder.

In order to achieve the above object, the cylinder of the present utility model provides the following technical solutions:

a cylinder comprising a cylinder body and a high pressure piston as claimed in any one of the preceding claims.

The beneficial effects of the high-pressure piston are that: the sealing piece for sealing the valve body channel from the outer side of the piston head is arranged on the valve body, so that the tail end of the high-pressure piston does not have a gas storage space when the gas channel is sealed by the one-way valve, the gas compression efficiency is effectively improved, and the problem of gas waste is solved.

The beneficial effects of the cylinder of the utility model are similar to those of the high-pressure piston, and are not described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:

FIG. 1 is a schematic view showing the overall structure of a cylinder according to an embodiment of the present utility model;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a piston rod; 2. a piston head; 201. a plug body; 202. a connection part; 3. a gas channel; 4. a one-way valve; 401. a valve body; 4011. a limit groove; 402. a valve body passage; 403. a blocking member; 4031. a limit part; 4032. a blocking part; 404. a limit spring; 405. a stopper; 5. a seal ring; 6. an elastic member; 7. a cone pad; 8. a high pressure seal cartridge; 9. a high pressure support pad; 901. a receiving groove; 10. a cylinder body.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.

The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

Example 1 of the inventive cylinder:

the utility model provides a cylinder, which effectively improves the efficiency of compressing gas by improving the structure of a one-way valve at the tail end of a high-pressure piston in the cylinder and solves the technical problem of waste of the compressed gas.

Specifically, as shown in fig. 1 and 2, the cylinder includes a cylinder body 10 and a high-pressure piston. The high-pressure piston has a piston rod 1 and a piston head 2 mounted at the end of the piston rod 1, the piston rod 1 being adapted to drive the piston head 2 to reciprocate in a cylinder 10 to compress a gas.

The piston head 2 is provided with a gas channel 3 for the passage of gas, and the end of the piston head 2 is provided with a one-way valve 4 for one-way ventilation. The check valve 4 comprises a valve body 401, the valve body 401 is detachably connected with the piston head 2 through threads, a valve body channel 402 capable of communicating with the gas channel 3 is formed in the valve body 401, and a blocking piece 403 for blocking the valve body channel 402 from the outer side of the piston head 2 is arranged on the valve body 401.

In this embodiment, the plugging member 403 includes a limiting portion 4031 and a plugging portion 4032 integrally connected, and the diameter of the plugging portion 4032 is larger than that of the valve body channel 402, and in this embodiment, the plugging portion 4032 is symmetrical in shape on both sides of the axis of the valve body channel 402, and is in a T shape. The stopper portion 4031 and the blocking portion 4032 are provided on both sides of the valve body passage 402, and the blocking portion 4032 is provided outside the piston head 2, so that the valve body passage 402 can be blocked by the movement from the outside of the piston head 2.

The valve body 401 is provided with a limit groove 4011 communicated with the valve body channel 402, and the shape of the limit groove 4011 is matched with that of the plugging portion 4032, so that the plugging portion 4032 can be conveniently and stably plugged the valve body channel 402. In addition, the blocking portion 4032 can be made flush with the valve body 401 when the valve body passage 402 is blocked, so that the formation of a gas storage space is avoided. The limit groove 4011 is funnel-shaped with a large opening facing outward. Thus, the guide function can be achieved, and the plugging portion 4032 can conveniently and accurately plug the valve body channel 402 along the limit groove 4011.

The check valve 4 is internally provided with a limit spring 404, the tail end of the plugging piece 403 is provided with a clamp spring serving as a stop piece 405, and the limit spring 404 is fixedly connected with the plugging piece 403 through the clamp spring. The limiting spring 404 is conical, and one end of the small diameter of the limiting spring 404 is fixedly connected with the blocking piece 403. So that the spacing spring 404 is more stable when compressively deformed.

In order to ensure the air tightness between the piston head and the cylinder body 10, the piston head 2 is provided with a two-stage sealing structure, specifically, the piston head 2 is provided with a plug body 201 and a connecting part 202 which are integrally connected, the connecting part 202 is detachably connected with the piston rod 1, and the outer side of the plug body 201 is provided with a one-stage sealing structure formed by two sealing rings 5. The connecting portion 202 is provided with a secondary sealing structure comprising an elastic piece 6, a cone pad 7, a high-pressure sealing cylinder 8 and a high-pressure supporting pad 9 which are sequentially pressed, in this embodiment, the elastic piece 6 is a spiral spring, the high-pressure sealing cylinder 8 is made of a deformable soft elastic material, and the high-pressure sealing cylinder 8 is always expanded circumferentially and outwards by the elasticity of the spiral spring through the cone pad 7, so that the tightness of the high-pressure sealing cylinder 8 and the cylinder 10 is ensured. The high-pressure supporting pad 9 is mainly used for further supporting the high-pressure sealing cylinder 8, so that the high-pressure sealing cylinder 8 is prevented from being deformed excessively and fatigued and broken.

In order to enable the high-pressure support pad 9 to better support the high-pressure sealing cylinder 8, a containing groove 901 is formed in one side, facing the high-pressure sealing cylinder 8, of the high-pressure support pad 9, and the containing groove 901 is matched with the end face of the high-pressure sealing cylinder 8.

The working principle of the utility model is as follows: firstly, the high-pressure piston moves upwards, external gas enters the gas channel 3, the blocking piece 403 is pressed downwards by the gas, so that the blocking piece 403 releases blocking of the valve body channel 402, then the gas enters the cylinder body 10 through the valve body channel 402, when the high-pressure piston moves downwards to compress the gas, the blocking piece 403 is reset by the limiting spring 404, at the moment, the valve body channel 402 is sealed, the compressed gas in the cylinder body 10 cannot enter the valve body channel 402, and therefore, compared with the prior art, the gas storage space at the tail end of the high-pressure piston is eliminated, the gas compression efficiency is improved, and meanwhile, the problem of gas waste is solved.

In other embodiments of the cylinder, unlike embodiment 1, in this embodiment, the blocking member is a cover structure that can be fastened to the end of the valve body, and the cover structure is fixedly connected to the valve body by a spring.

In other embodiments of the cylinder, unlike embodiment 1, in this embodiment, the diameter of the plugging portion is adapted to the valve body channel and is in interference fit, at this time, the valve body is not provided with a limit groove, and plugging of the valve body channel is achieved through the fit of the plugging portion and the valve body channel.

In other embodiments of the cylinder, unlike embodiment 1, in the present embodiment, the seal ring is provided with three or more.

In other embodiments of the cylinder, unlike embodiment 1, in the present embodiment, the elastic member is a disc spring.

Example 1 of the high pressure piston of the present utility model:

the specific structure of the high-pressure piston in this embodiment is the same as that described in the embodiments of all the cylinders, and will not be described here.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a high-pressure piston, includes piston rod (1) and piston head (2), has gas channel (3) in piston head (2), and piston head (2) end is provided with check valve (4) that are used for one-way ventilation, check valve (4) include valve body (401), and valve body (401) are connected with piston head (2) can be dismantled, valve body (401) are interior have valve body passageway (402) that can communicate with gas channel (3), a serial communication port, be provided with on valve body (401) from shutoff piece (403) of piston head (2) outside shutoff valve body passageway (402).

2. The high-pressure piston according to claim 1, wherein the blocking piece (403) comprises a limit part (4031) and a blocking part (4032) which are integrally connected, the diameter of the blocking part (4032) is not smaller than that of the valve body channel (402), the limit part (4031) and the blocking part (4032) are arranged at two sides of the valve body channel (402), and the blocking part (4032) is arranged outside the piston head (2).

3. The high-pressure piston according to claim 2, characterized in that the valve body (401) is provided with a limit groove (4011) communicated with the valve body channel (402), and the shape of the limit groove (4011) is matched with the plugging part (4032).

4. A high pressure piston according to claim 3, characterized in that the limit groove (4011) is funnel-shaped with a large mouth facing outwards.

5. The high-pressure piston according to claim 1, wherein the check valve (4) is internally provided with a limit spring (404), one end of the limit spring (404) is fixedly connected with the plugging piece (403), and the other end of the limit spring (404) is fixedly connected with the valve body (401).

6. The high-pressure piston according to claim 5, characterized in that the end of the blocking piece (403) is provided with a stop piece (405), and the limit spring (404) is fixedly connected with the blocking piece (403) by means of the stop piece (405).

7. The high-pressure piston according to claim 5, wherein the limiting spring (404) is conical, and one end of the small diameter of the limiting spring (404) is fixedly connected with the blocking piece (403).

8. The high-pressure piston according to any one of claims 1 to 7, wherein the piston head (2) is provided with a plug body (201) and a connecting part (202) which are integrally connected, the connecting part (202) is detachably connected with the piston rod (1), a primary sealing structure formed by a plurality of sealing rings (5) is arranged on the outer side of the plug body (201), and a secondary sealing structure formed by an elastic piece (6), a conical gasket (7), a high-pressure sealing cylinder (8) and a high-pressure supporting gasket (9) which are sequentially pressed together is arranged on the outer side of the connecting part (202), and the primary sealing structure and the secondary sealing structure are respectively used for being in sealing connection with a cylinder body (10) on the outer side of the high-pressure piston.

9. The high-pressure piston according to claim 8, characterized in that a receiving groove (901) is arranged on the side of the high-pressure support pad (9) facing the high-pressure sealing cylinder (8), and the receiving groove (901) is matched with the end face of the high-pressure sealing cylinder (8).

10. Cylinder, characterized by comprising a cylinder block (10) and a high-pressure piston according to any of the preceding claims 1-9.