阅读说明：本技术 高压活塞组 (High-pressure piston group ) 是由 林建州 曾素珍 于 2019-08-29 设计创作，主要内容包括：本发明公开了一种高压活塞组,包括弹簧座、高压凡尔底座、高压弹簧、高压凡尔轴、喷嘴垫片和喷嘴,高压活塞组通过喷嘴将弹簧座、高压凡尔底座、高压弹簧和高压凡尔轴装配在减压阀的阀体排气通道内。优点,本高压活塞组,未调压时通过高压凡尔轴密封住减压阀的阀体排气通道,调压时下压高压凡尔轴的第一轴段,可进行压力调整,调整方式简单；本高压活塞组设置在阀体内,结构小巧、灵活。(The invention discloses a high-pressure piston group, which comprises a spring seat, a high-pressure valve base, a high-pressure spring, a high-pressure valve shaft, a nozzle gasket and a nozzle. The high-pressure piston group has the advantages that when the pressure is not regulated, the valve body exhaust channel of the pressure reducing valve is sealed through the high-pressure valve shaft, when the pressure is regulated, the first shaft section of the high-pressure valve shaft is pressed down, the pressure can be regulated, and the regulation mode is simple; the high-pressure piston set is arranged in the valve body, and the structure is small and flexible.)

1. A high-pressure piston group is characterized by comprising a spring seat (1), a high-pressure valve base (2), a high-pressure spring (3), a high-pressure valve shaft (4), a nozzle gasket (5) and a nozzle (6),

the high-pressure valve shaft (4) is composed of a first shaft section (41), a cone frustum section (42), a cylinder section (43) and a second shaft section (44), the first shaft section (41), the cone frustum section (42), the cylinder section (43) and the second shaft section (44) are sequentially connected, and the large end of the cone frustum section (42) is connected with the cylinder section (43);

the nozzle (6) is provided with a pressure relief channel (61), and the first shaft section (41) of the high-pressure valve shaft (4) is inserted into the pressure relief channel (61) of the nozzle (6) and protrudes out of the upper end surface of the nozzle (6);

the nozzle gasket (5) is embedded into a gasket groove arranged on the lower end face of the nozzle (6), and the nozzle gasket (5) is contacted with the small end of the frustum section (42);

the high-pressure valve base (2) is provided with a central hole for the second shaft section (44) of the high-pressure valve shaft (4) to penetrate through, and the outer surface of the lower part of the high-pressure valve base (2) is provided with a conical surface (21);

the spring seat (1) is axially provided with a pressure relief air outlet channel (11), and a second shaft section (44) of the high-pressure valve shaft (4) penetrates through a central hole of the high-pressure valve base (2) and extends into the pressure relief air outlet channel (11); the lower end surface of the spring seat (1) is concavely provided with a pressure relief air inlet (13) with two ends penetrating, and the pressure relief air inlet (13) is communicated with the pressure relief air outlet channel (11);

the high-pressure spring (3) is sleeved on the second shaft section (44) of the high-pressure valve shaft (4), one end of the high-pressure spring (3) is propped against the end face of the cylindrical section (43), and the other end of the high-pressure spring (3) is propped against the upper end face of the high-pressure valve base (2); the conical surface (21) at the lower part of the high-pressure valve base (2) is inserted into the conical hole (12) which is concavely arranged on the upper end surface of the spring seat (1);

the high-pressure piston group assembles the spring seat (1), the high-pressure valve base (2), the high-pressure spring (3) and the high-pressure valve shaft (4) in a valve body exhaust passage of the pressure reducing valve through the nozzle (6).

2. The high-pressure piston group as claimed in claim 1, characterized in that the end face of the nozzle gasket (5) contacting with the small end of the frustum-conical section (42) is provided with a conical recess, and the nozzle gasket (5) is made of PFA.

3. The high pressure piston group according to claim 1, characterized in that the first shaft section (41), the frustum-conical section (42), the cylindrical section (43) and the second shaft section (44) are of one-piece construction.

4. The high pressure piston group according to claim 1, characterized in that the diameter of the first shaft section (41) is smaller than the diameter of the second shaft section (44).

5. The high-pressure piston group as claimed in claim 1, characterized in that the high-pressure valve seat (2) is provided with openings running through the upper and lower end faces of the high-pressure valve seat (2) in the axial direction, and the openings are communicated with the central hole of the high-pressure valve seat (2).

6. A high-pressure piston group according to claim 1, characterized in that the outer surface of the nozzle (6) is provided with an external thread for connection to the exhaust channel of the valve body.

7. The high-pressure piston group as claimed in claim 1, characterized in that the spring seat (1), the high-pressure valve shaft (4) and the nozzle (6) are made of 316L stainless steel.

8. The high-pressure piston group as claimed in claim 1, characterized in that the upper end face of the high-pressure valve base (2) is concavely provided with a positioning groove into which the other end of the high-pressure spring (3) extends.

Technical Field

The invention relates to the technical field of pressure reducing valves, in particular to a high-pressure piston group used in a high-pressure reducing valve.

Background

At present, the condition that piston pressure climbs upwards can appear in the relief valve that uses under the high pressure operating mode, and the piston group who uses in the current relief valve can't satisfy the operating mode requirement.

Disclosure of Invention

The invention provides a high-pressure piston group capable of adjusting pressure under a high-pressure working condition, which adopts the technical scheme that:

a high-pressure piston group, which comprises a spring seat, a high-pressure valve base, a high-pressure spring, a high-pressure valve shaft and a nozzle,

the high-pressure valve shaft consists of a first shaft section, a conical frustum section, a cylindrical section and a second shaft section, wherein the first shaft section, the conical frustum section, the cylindrical section and the second shaft section are sequentially connected, and the large end of the conical frustum section is connected with the cylindrical section;

the nozzle is provided with a pressure relief channel, and the first shaft section of the high-pressure valve shaft is inserted into the pressure relief channel of the nozzle and protrudes out of the upper end surface of the nozzle;

the nozzle gasket is embedded into a gasket groove arranged on the lower end face of the nozzle, and the nozzle gasket is contacted with the small end of the frustum section;

the high-pressure valve base is provided with a central hole which is penetrated by the second shaft section of the high-pressure valve shaft, and the outer surface of the lower part of the high-pressure valve base is provided with a conical surface;

the spring seat is axially provided with a pressure relief air outlet channel, and the second shaft section of the high-pressure valve shaft penetrates through the central hole of the high-pressure valve base and extends into the pressure relief air outlet channel; the lower end surface of the spring seat is concavely provided with a pressure relief air inlet passage with two ends penetrating through, and the pressure relief air inlet passage is communicated with the pressure relief air outlet passage;

the high-pressure spring is sleeved on the second shaft section of the high-pressure valve shaft, one end of the high-pressure spring props against the end face of the cylindrical section, and the other end of the high-pressure spring props against the upper end face of the high-pressure valve base; the conical surface at the lower part of the high-pressure valve base is inserted into a conical hole which is arranged in the concave way on the upper end surface of the spring seat;

the high-pressure piston group assembles the spring seat, the high-pressure valve base, the high-pressure spring and the high-pressure valve shaft in a valve body exhaust passage of the pressure reducing valve through the nozzle.

Preferably, the nozzle gasket is provided with a conical groove on the end face contacting with the small end of the conical frustum section, and the nozzle gasket is made of PFA material. The PFA material in the high-pressure piston group has extremely strong corrosion resistance, can be applied to the working conditions of toxic gas and corrosive gas,

preferably, the first shaft section, the conical frustum section, the cylindrical section and the second shaft section are of an integrated structure.

Preferably, the diameter of the first shaft section is smaller than the diameter of the second shaft section.

Preferably, the high-pressure valve base is provided with an opening which penetrates through the upper end surface and the lower end surface of the high-pressure valve base along the axial direction, and the opening is communicated with a central hole of the high-pressure valve base. The structural design of the high-pressure valve base is beneficial to installation and positioning and is also convenient for adjustment of the pressure value.

Preferably, the outer surface of the nozzle is provided with an external thread connected with the exhaust channel of the valve body. The thread setting is easy to assemble.

Preferably, the spring seat, the high-pressure valve shaft and the nozzle are made of 316L stainless steel.

Preferably, the upper end surface of the high-pressure valve base is concavely provided with a positioning groove for the other end of the high-pressure spring to extend into.

Compared with the prior art, the invention has the advantages that:

according to the high-pressure piston group, the valve body exhaust channel of the pressure reducing valve is sealed through the high-pressure valve shaft when pressure is not regulated, the first shaft section of the high-pressure valve shaft is pressed down when pressure is regulated, pressure can be regulated, and the regulation mode is simple; the high-pressure piston set is arranged in the valve body, and the structure is small and flexible.

Drawings

Fig. 1 is an exploded view of the structure of the embodiment.

Fig. 2 is a state diagram of the high-pressure piston group when the pressure is not adjusted.

Fig. 3 is a state diagram of the high-pressure piston group during pressure adjustment.

Detailed Description

In order that the present invention may be more fully understood, reference is now made to the following description taken in conjunction with the accompanying drawings, which are set forth in part in the several figures of the drawing and in the several embodiments of the invention.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.