CN111637107A - Manual and pneumatic integrated valve - Google Patents
Manual and pneumatic integrated valve Download PDFInfo
- Publication number
- CN111637107A CN111637107A CN202010426384.9A CN202010426384A CN111637107A CN 111637107 A CN111637107 A CN 111637107A CN 202010426384 A CN202010426384 A CN 202010426384A CN 111637107 A CN111637107 A CN 111637107A
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- China
- Prior art keywords
- valve
- upper cover
- valve body
- shaft sleeve
- button
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
A manual and pneumatic integrated valve comprises a pressing plate, a first sealing gasket, a valve body, a limiting seat, a first polyurethane sealing ring, an O-shaped ring, a shaft sleeve, a first valve core, a pressing cap, a second sealing gasket, a second polyurethane sealing ring, a first upper cover, a button support, a key valve button, a second upper cover and a second valve core, wherein the limiting seat and the first polyurethane sealing ring are arranged on the valve body; the O-shaped ring is arranged on the shaft sleeve and used for sealing between the shaft sleeve and the valve body, and the valve core is arranged in the shaft sleeve and is in a sliding valve sealing mode with the shaft sleeve; the press cap is arranged on the upper part of the valve core, the second polyurethane sealing ring is arranged in the first upper cover, the button bracket is arranged on the first upper cover, the second sealing gasket is combined with the first upper cover and assembled in the valve body, the key valve button is assembled with the second upper cover, and the second upper cover is assembled on the valve body. The invention has the functions of a key valve and a two-position three-way double-pneumatic control valve, and can ensure that a partial stroke test loop of the PST is simpler and more reliable.
Description
The technical field is as follows:
the invention relates to a pneumatic valve used in a pneumatic circuit, in particular to a manual pneumatic integrated valve used in a PST partial stroke test pneumatic circuit, which is used for an ESD valve controlled by a pneumatic actuator to perform PST partial stroke test.
Background art:
the so-called Partial Stroke Test (PST-Partial Stroke Test) of the ESD valve is a safety measure for an Emergency Shutdown (ESD-Emergency Shutdown) valve, and a method for detecting a fault in an ESD valve system is to make the ESD valve perform a periodic Partial Stroke action. For example: the ESD valve is partially closed for 10-30% of travel from a fully open position, and periodic motion is set at certain time intervals so as to better check the valve rod movement condition and judge whether the working state of the function is normal. The PST is a reliable detection method that does not affect the normal operation of the ESD valve.
In pneumatic control, the function of testing partial stroke of the ESD valve can be realized through a pneumatic circuit, and the function of testing partial stroke is realized by pneumatic control accessories such as a pressure reducing valve, an electromagnetic valve, a pneumatic control valve, a key valve and the like in the circuit. A circuit of an ESD valve controlled by a single-action actuator and having a function of testing partial stroke of a PST is shown in a figure 1, an electromagnetic valve receives an electric signal to control an actuator switch, when the PST partial stroke test is carried out, a key valve button is pressed, an actuator lower cavity exhausts air, the actuator operates towards an off position, when the PST partial stroke test is carried out, a preset position (usually, the preset position is 10% -30% of a closing stroke), a cam valve is switched, a two-position three-way double-air control valve is switched, the actuator lower cavity is inflated, and the actuator lower cavity returns to an. The existing pneumatic control scheme mainly comprises a two-position three-way double pneumatic control valve and a two-position three-way key valve. In actual operation, if a button of the two-position three-way manual control valve is pressed all the time, the valve positions of the two-position three-way pneumatic control valve cannot be switched, so that the actuator can be operated in a closed position all the time, risks are brought to equipment operation, the key valve and the two-position three-way dual pneumatic control valve need to be matched, and leakage points are increased invisibly.
The invention content is as follows:
in view of the above, it is desirable to provide a manual and pneumatic integrated valve. The function of key valve is possessed promptly, has the function of two tee bend double-air control valves again, can make the partial stroke test circuit of PST simple and reliable more.
A manual and pneumatic integrated valve comprises a pressing plate, a first sealing gasket, a valve body, a limiting seat, a first polyurethane sealing ring, an O-shaped ring, a shaft sleeve, a first valve core, a pressing cap, a second sealing gasket, a second polyurethane sealing ring, a first upper cover, a button support, a key valve button, a second upper cover and a second valve core, wherein the pressing plate is assembled on the valve body and sealed by the first sealing gasket, and the limiting seat and the first polyurethane sealing ring are arranged on the valve body; the O-shaped ring is arranged on the shaft sleeve and used for sealing between the shaft sleeve and the valve body, and the valve core is arranged in the shaft sleeve and is in a sliding valve sealing mode with the shaft sleeve; the press cap is arranged on the upper part of the valve core, the second polyurethane sealing ring is arranged in the first upper cover, the button bracket is arranged on the first upper cover, the second sealing gasket is combined with the first upper cover and assembled in the valve body, the key valve button is assembled with the second upper cover, and the second upper cover is assembled on the valve body.
Preferably, a gas passage is arranged in the valve body, two first gas inlets and second gas inlets, a first exhaust port and a second exhaust port, a first working port and a second working port, a first pilot port and a second pilot port are arranged on the surface of the valve body, and the second working port is communicated with the second pilot port.
Preferably, the manual and pneumatic integrated valve further comprises a spring mounted in an inner hole of the valve core.
The sealing structure adopts a sliding valve sealing structure, namely, the shaft sleeve and the first valve core are sealed by a precise processing matching surface and lubricating grease between the matching surfaces; the air can be fed in two directions, and the evacuation port can be used as an air inlet. The invention uses the key valve to control the pilot pressure of the valve body, and then controls the switching of the valve body. The valve body is switched only when the first pilot port and the second pilot port have pressure, and the valve position stops at the current valve position under the condition that the pilot has no pressure. The spring is arranged at the lower end of the double pneumatic control valve in the manual pneumatic integrated valve, and when the pressures of the two pilot ports of the double pneumatic control valve are the same, the valve positions of the pneumatic control valves can be ensured to be switched and always pushed by the spring, and the pneumatic circuit control cannot be influenced because the valve positions are not switched.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a pneumatic control circuit during a partial stroke test of a single-acting actuator PST;
FIG. 2 is a schematic diagram of a manual and pneumatic integrated valve;
FIG. 3 is an exploded view of a manual and pneumatic integrated valve;
FIG. 4 is a schematic diagram illustrating a state of valve position switching of the hand-operated and pneumatic integrated valve;
FIG. 5 is a schematic diagram of the valve position switching of the integrated manual-pneumatic valve;
in fig. 3, 4 and 5: the valve comprises a pressure plate 1, a first sealing gasket 2, a valve body 3, a limiting seat 4, a first polyurethane sealing ring 5, an O-shaped ring 6, a spring 7, a shaft sleeve 8, a valve core 9, a pressure cap 10, a second sealing gasket 11, a second polyurethane sealing ring 12, a first upper cover 13, a button support 14, a key valve button 15 and a second upper cover 16;
the air conditioner comprises a first air inlet P1, a second air inlet P2, a first exhaust E1, a second exhaust E2, a first working port A1, a second working port A2, a first pilot port PO1, a second pilot port PO2, a pilot port PO3, a double-air control valve A and a key valve B.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The present invention provides the following specific examples.
Referring to fig. 2, 3, 4 and 5, the manual and pneumatic integrated valve includes a pressure plate 1, a first sealing gasket 2, a valve body 3, a limiting seat 4, a first polyurethane sealing ring 5, an O-ring 6, a spring 7, a shaft sleeve 8, a valve core 9, a pressure cap 10, a second sealing gasket 11, a second polyurethane sealing ring 12, a first upper cover 13, a button support 14, a key valve button 15 and a second upper cover 16. The pressure plate 1 is assembled on the valve body 3 and sealed by the first sealing gasket 2, and the limiting seat 4 and the first polyurethane sealing ring 5 are arranged on the valve body 3; the O-shaped ring 6 is arranged on the shaft sleeve 8 and used for sealing between the shaft sleeve 8 and the valve body 3, and the valve core 9 is arranged in the shaft sleeve 8 and is in a sliding valve sealing mode with the shaft sleeve 8; the spring 7 is arranged in an inner hole of the valve core 9, the pressing cap 10 is arranged at the upper part of the valve core 9, the second polyurethane sealing ring 12 is arranged in the first upper cover 13, the button bracket 14 is arranged on the first upper cover 13, the second sealing gasket 11 is combined with the first upper cover 13 and assembled in the valve body 3, the key valve button 15 is assembled with the second upper cover 16, and the second upper cover 16 is assembled on the valve body 3.
The valve body 3 is internally provided with a gas passage, the surface of the valve body is provided with two first gas inlet P1 and second gas inlet P2, a first exhaust port E1 and a second exhaust port E2, a first working port A1 and a second working port A2, a first pilot port PO1 and a second pilot port PO2, and the second working port A2 is communicated with the pilot port PO 3. When the key valve button 15 is not pressed, the key valve B does not switch the valve position, the pilot pressure at the pilot port P03 is exhausted from the second exhaust port E2, and the first exhaust port E1 is communicated with the first working port A1 at the moment, and the state is shown in FIG. 4; when the key valve button 15 is pressed down, the key valve B is switched, the pressure of the second air inlet P2 enters the pilot port P03, the double pneumatic control valve A is switched, at the moment, the first working port A1 is communicated with the first air inlet P1, and the switching is realized, wherein the state is shown in figure 5; when the pressure of the second pilot port P02 is the same as the pressure of the second intake port P2, the dual pneumatic control valve a is restored to the non-switched state, i.e., the state shown in fig. 4, due to the urging force of the spring 7.
The sealing structure adopts a sliding valve sealing structure, namely, the shaft sleeve and the first valve core are sealed by a precise processing matching surface and lubricating grease between the matching surfaces; the air can be fed in two directions, and the evacuation port can be used as an air inlet. The invention uses the key valve to control the pilot pressure of the valve body, and then controls the switching of the valve body. The valve body is switched only when the first pilot port and the second pilot port have pressure, and the valve position stops at the current valve position under the condition that the pilot has no pressure. The spring is arranged at the lower end of the double pneumatic control valve in the manual pneumatic integrated valve, and when the pressures of the two pilot ports of the double pneumatic control valve are the same, the valve positions of the pneumatic control valves can be ensured to be switched and always pushed by the spring, and the pneumatic circuit control cannot be influenced because the valve positions are not switched.
Claims (3)
1. A manual and pneumatic integrated valve is characterized in that: the manual and pneumatic integrated valve comprises a pressing plate, a first sealing gasket, a valve body, a limiting seat, a first polyurethane sealing ring, an O-shaped ring, a shaft sleeve, a first valve core, a pressing cap, a second sealing gasket, a second polyurethane sealing ring, a first upper cover, a button support, a key valve button, a second upper cover and a second valve core, wherein the pressing plate is assembled on the valve body and sealed by the first sealing gasket, and the limiting seat and the first polyurethane sealing ring are arranged on the valve body; the O-shaped ring is arranged on the shaft sleeve and used for sealing between the shaft sleeve and the valve body, and the valve core is arranged in the shaft sleeve and is in a sliding valve sealing mode with the shaft sleeve; the press cap is arranged on the upper part of the valve core, the second polyurethane sealing ring is arranged in the first upper cover, the button bracket is arranged on the first upper cover, the second sealing gasket is combined with the first upper cover and assembled in the valve body, the key valve button is assembled with the second upper cover, and the second upper cover is assembled on the valve body.
2. A hand-operated pneumatic integrated valve as set forth in claim 1, wherein: the valve body is internally provided with a gas passage, the surface of the valve body is provided with two first gas inlets and second gas inlets, a first exhaust port and a second exhaust port, a first working port and a second working port, a first pilot port and a second pilot port, and the second working port is communicated with the second pilot port.
3. A hand-operated pneumatic integrated valve as set forth in claim 2, wherein: the manual and pneumatic integrated valve also comprises a spring arranged in an inner hole of the valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426384.9A CN111637107A (en) | 2020-05-19 | 2020-05-19 | Manual and pneumatic integrated valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426384.9A CN111637107A (en) | 2020-05-19 | 2020-05-19 | Manual and pneumatic integrated valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111637107A true CN111637107A (en) | 2020-09-08 |
Family
ID=72328503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010426384.9A Withdrawn CN111637107A (en) | 2020-05-19 | 2020-05-19 | Manual and pneumatic integrated valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111637107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236848A (en) * | 2021-06-03 | 2021-08-10 | 浙江中德自控科技股份有限公司 | Valve control system capable of automatically cutting off air source fault |
-
2020
- 2020-05-19 CN CN202010426384.9A patent/CN111637107A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236848A (en) * | 2021-06-03 | 2021-08-10 | 浙江中德自控科技股份有限公司 | Valve control system capable of automatically cutting off air source fault |
| CN113236848B (en) * | 2021-06-03 | 2023-05-26 | 浙江中德自控科技股份有限公司 | Valve control system for automatic cutting off of air source fault |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200908 |
|
| WW01 | Invention patent application withdrawn after publication |