CN110630790A - High-pressure piston group - Google Patents
High-pressure piston group Download PDFInfo
- Publication number
- CN110630790A CN110630790A CN201910808654.XA CN201910808654A CN110630790A CN 110630790 A CN110630790 A CN 110630790A CN 201910808654 A CN201910808654 A CN 201910808654A CN 110630790 A CN110630790 A CN 110630790A
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- Prior art keywords
- pressure
- section
- nozzle
- shaft
- pressure valve
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- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
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.
Description
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.
Example 1:
a high-pressure piston group comprises a spring seat 1, a high-pressure valve base 2, a high-pressure spring 3, a high-pressure valve shaft 4 and a nozzle 6. In the high-pressure piston group of the embodiment, the spring seat 1, the high-pressure valve base 2, the high-pressure spring 3 and the high-pressure valve shaft 4 are assembled in a valve body exhaust passage of the pressure reducing valve through the nozzle 6. The outer surface of the nozzle 6 is provided with an external thread connected with the exhaust passage of the valve body.
As shown in fig. 1, the high pressure valve shaft 4 is composed of a first shaft section 41, a truncated cone section 42, a cylindrical section 43 and a second shaft section 44, and the first shaft section 41, the truncated cone section 42, the cylindrical section 43 and the second shaft section 44 are of an integral structure. The first shaft section 41, the frustum-conical section 42, the cylindrical section 43 and the second shaft section 44 are connected in series, the first shaft section 41 having a smaller diameter than the second shaft section 44. The large end of the frustum section 42 is connected with the cylinder section 43; the nozzle 6 is provided with a pressure relief channel 61, 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 face 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 end face of the nozzle gasket 5 contacting with the small end of the cone frustum section 42 is provided with a cone-shaped groove, and the nozzle gasket 5 is made of PFA material. The nozzle gasket 5 in the high-pressure piston assembly is made of PFA (Perfluoro fluoro-alkoxy) material, and the PFA material is extremely strong in corrosion resistance, so that the high-pressure piston assembly can be applied to the working conditions of toxic gas and corrosive gas.
As shown in fig. 1, 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 pass 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 provided with a pressure relief air outlet channel 11 along the axial direction, and the second shaft section 44 of the high-pressure valve shaft 4 penetrates through the 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 channel 13 with two ends penetrating, and the pressure relief air inlet channel 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 props against the end face of the cylindrical section 43, and the other end of the high-pressure spring 3 props 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 arranged in the concave way on the upper end surface of the spring seat 1.
The high-pressure valve base 2 is provided with an opening which penetrates through the upper end surface and the lower end surface of the high-pressure valve base 2 along the axial direction, and the opening is communicated with a central hole of the high-pressure valve base 2. The structural design of the high-pressure valve base 2 is beneficial to installation and positioning and is also convenient for adjustment of a pressure value.
The upper end surface of the high-pressure valve base 2 is concavely provided with a positioning groove for the other end of the high-pressure spring 3 to extend into, and the high-pressure spring 3 extends into the positioning groove to be convenient for positioning and installation.
As shown in fig. 2 and 3, when the pressure is not adjusted, the distance of the first shaft section 41 of the high-pressure valve shaft 4 protruding out of the upper end surface of the nozzle 6 is defined as a, the length of the high-pressure spring 3 is defined as B, and the adjustable pressure distance is defined as C.
For example, in this embodiment, when the pressure is not adjusted, a is 3.27mm, B is 6.47mm, the spring deformation restoring force of the high-pressure spring 3 is 7.14N, the adjustable pressure distance C is 3.17mm, and the designed actual adjustment distance is 3 mm.
When the pressure regulating operation is realized, the inlet pressure of the pressure reducing valve is 20MPa, the distance between the pressing high-pressure valve shaft and the pressure regulating valve shaft is defined as h, when h is 1mm, the outlet pressure can be adjusted to 4-6MPa (the influence of specific numerical fertilization processing technology, assembly error and the like), and when h is 3mm, the outlet pressure can be adjusted to 15 MPa.
The pressure of the high-pressure piston group is adjustable, and the condition that the pressure of the piston climbs upwards is effectively avoided.
The parts not involved in the present invention are the same as or implemented using the prior art.
The embodiments of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the content of the claims of the present invention should be regarded as the technical scope of the present invention.
Claims (8)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910808654.XA CN110630790A (en) | 2019-08-29 | 2019-08-29 | High-pressure piston group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910808654.XA CN110630790A (en) | 2019-08-29 | 2019-08-29 | High-pressure piston group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110630790A true CN110630790A (en) | 2019-12-31 |
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ID=68969506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910808654.XA Pending CN110630790A (en) | 2019-08-29 | 2019-08-29 | High-pressure piston group |
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| Country | Link |
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| CN (1) | CN110630790A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6170519B1 (en) * | 1999-07-28 | 2001-01-09 | Hose Shop, Ltd. | Pressure regulator |
| CN202788748U (en) * | 2012-09-22 | 2013-03-13 | 董宝玉 | High pressure oil-water well sleeve pressure relief device |
| CN206503983U (en) * | 2017-01-19 | 2017-09-19 | 重庆鼎辉汽车燃气系统有限公司 | Plunger type single-stage EFI pressure-reducing valve |
| CN108119683A (en) * | 2017-12-18 | 2018-06-05 | 捷锐企业(上海)有限公司 | A kind of valve core structure and pressure reducing valve |
| CN109373034A (en) * | 2018-11-23 | 2019-02-22 | 滕建辉 | A kind of high pressure air relief valve |
| CN210661529U (en) * | 2019-08-29 | 2020-06-02 | 南京伟易达机电科技发展有限公司 | High-pressure piston group |
-
2019
- 2019-08-29 CN CN201910808654.XA patent/CN110630790A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6170519B1 (en) * | 1999-07-28 | 2001-01-09 | Hose Shop, Ltd. | Pressure regulator |
| CN202788748U (en) * | 2012-09-22 | 2013-03-13 | 董宝玉 | High pressure oil-water well sleeve pressure relief device |
| CN206503983U (en) * | 2017-01-19 | 2017-09-19 | 重庆鼎辉汽车燃气系统有限公司 | Plunger type single-stage EFI pressure-reducing valve |
| CN108119683A (en) * | 2017-12-18 | 2018-06-05 | 捷锐企业(上海)有限公司 | A kind of valve core structure and pressure reducing valve |
| CN109373034A (en) * | 2018-11-23 | 2019-02-22 | 滕建辉 | A kind of high pressure air relief valve |
| CN210661529U (en) * | 2019-08-29 | 2020-06-02 | 南京伟易达机电科技发展有限公司 | High-pressure piston group |
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