CN113775786A - Pneumatic discharge device and working method thereof - Google Patents
Pneumatic discharge device and working method thereof Download PDFInfo
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- CN113775786A CN113775786A CN202111050170.7A CN202111050170A CN113775786A CN 113775786 A CN113775786 A CN 113775786A CN 202111050170 A CN202111050170 A CN 202111050170A CN 113775786 A CN113775786 A CN 113775786A
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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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
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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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
- F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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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
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
A pneumatic relief device and a working method thereof belong to the technical field of protection devices before an overpressure safety valve of a boiler system acts. The invention relates to a pneumatic relief valve and a manual ball valve communicated and fixed with the pneumatic relief valve, wherein media sequentially flow through the manual ball valve and the pneumatic relief valve. The invention aims to solve the problems that the internal flow passage of the existing electromagnetic relief device is irregular, the medium resistance is large, the main valve is in a spring direct action type, the impact on the sealing surface is large when the device is closed, and cracks and leakage are easy to occur under the impact condition, so that the internal flow passage of the device is regular, the medium resistance is small, the structure is simple, the switch is smooth and rapid, the leakage points are few, the influence of the temperature on the sealing ring is small, the interchangeability is good, the maintenance is convenient, the mechanical limit is realized, and the over-close phenomenon does not exist.
Description
Technical Field
The invention relates to a pneumatic discharge device, and belongs to the technical field of protection devices of boiler system overpressure safety valves before action.
Background
The protection device before the action of the overpressure safety valve of the existing boiler system is an electromagnetic relief device, and the electromagnetic relief device consists of an electromagnetic relief valve and a manual gate valve. The electromagnetic relief valve is controlled by an electric signal to open, and redundant steam of the boiler is discharged. The manual gate valve is installed before the electromagnetism bleeder valve, when the electromagnetism bleeder valve breaks down, closes the manual gate valve, makes the isolated system of electromagnetism bleeder valve, realizes that the boiler does not stop the stove and disintegrates and inspect the electromagnetism bleeder valve.
The electromagnetic relief device consists of an electromagnetic relief valve and a manual gate valve, and has an irregular internal flow passage and large medium resistance; the electromagnetic relief valve is of a pilot valve structure, the auxiliary valve is opened to drive the main valve to be opened, the reliability is related to the main valve and the auxiliary valve, the valve has many parts and complex structure, the main valve and the auxiliary valve are communicated by welding connecting pipes, and the leakage points are many; when the electromagnetic relief valve is opened, the medium force is required to overcome the spring force and the friction force between the main valve clack and the sleeve to open the valve, impurities in the medium easily enter a gap between the main valve clack and the guide sleeve, so that the opening and closing process is blocked, the friction force is too large, and the valve action is insensitive; when the pressure of boiler is recovered to normal, the electromagnet is cut off by receiving signal, the steam enters into back of main valve from gap between guide sleeve and valve clack of main valve to create back pressure, after the back pressure reaches a certain value, the main valve is closed, and the valve is opened and closed to complete closing. Long-time gas erosion causes the damage of the sealing surface to be more and more serious; the sealing of the main valve and the valve seat depends on the performance of a C-shaped ring, the C-shaped ring is expensive, and the contact surface is greatly influenced by temperature change. The main valve is of a spring direct action type, the main valve has larger impact on a sealing surface when being closed, cracks are easy to appear under the impact condition, and the service life is shorter; the main valve spring is influenced by high temperature and medium corrosion for a long time, so that the rigidity of the spring is reduced, the pretightening force of the main valve is reduced, and the main valve is easy to leak; the electromagnet coil is easy to burn after being electrified for a long time; the manual gate valve is a wedge-shaped rigid single gate plate, the machining precision is high, the gate plate and the valve seat are in single assembly during assembly, interchangeability is not realized, and once the sealing surface of the gate plate or the valve seat is damaged, the manual gate valve can only be replaced; the manual gate valve has no mechanical limit and has the phenomenon of passing.
Therefore, it is desirable to provide a device to replace the electromagnetic relief device to solve the above technical problems.
Disclosure of Invention
The invention has been developed in order to solve the problems of irregular internal flow passage, large medium resistance, direct spring action type main valve, large impact on a sealing surface when closing and easy cracking and leakage under impact conditions of the existing electromagnetic relief device, and a brief summary of the invention is given below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
a pneumatic relief device comprises a pneumatic relief valve and a manual ball valve which is fixedly communicated with the pneumatic relief valve, wherein media sequentially flow through the manual ball valve and the pneumatic relief valve;
the pneumatic relief valve includes the pneumatic valve body, pneumatic valve side valve body, pneumatic valve case group, the pneumatic valve retaining ring, pneumatic valve thrust gasket, the pneumatic valve bush, pneumatic valve rod and pneumatic valve support, pneumatic valve side valve body is installed on pneumatic valve body right side, pneumatic valve side valve body internally mounted has pneumatic valve case group, the pneumatic valve body, pneumatic valve side valve body and the inside pneumatic valve runner that processes of pneumatic valve case group have the intercommunication, the pneumatic valve support is installed at pneumatic valve body top, pneumatic valve rod bottom is passed through behind pneumatic valve support and the pneumatic valve body in proper order and is connected with pneumatic valve case group establishment, pneumatic valve rod top and pneumatic actuating mechanism establish and be connected, the pneumatic valve rod outside is from last to establishing with the pneumatic valve body to looping through the pneumatic valve bush and the pneumatic valve thrust gasket of suit extremely down and being connected.
Preferably: the pneumatic valve core group comprises a pneumatic valve left valve seat, a pneumatic valve ball body and a pneumatic valve right valve seat, the left end and the right end of the pneumatic valve ball body are respectively installed in cooperation with the pneumatic valve left valve seat and the pneumatic valve right valve seat, the pneumatic valve left valve seat is installed inside the pneumatic valve body, the right side is connected with the pneumatic valve body through a pneumatic valve disc spring, the left end of the pneumatic valve right valve seat is installed inside the pneumatic valve body, the right end of the pneumatic valve right valve seat is installed inside the pneumatic valve side valve body, and the pneumatic valve body is connected with the pneumatic valve side valve body through a pneumatic valve winding gasket.
Preferably: the outer side of the pneumatic valve rod is in clearance fit with the pneumatic valve bush, and the inner side of the pneumatic valve body is in threaded fit with the outer side of the pneumatic valve bush.
The invention aims to solve the problem that the electromagnetic coil of the electromagnet is easy to burn after being electrified for a long time; the manual gate valve is a wedge-shaped rigid single gate plate, the machining precision is high, the gate plate and the valve seat are in single assembly during assembly, interchangeability is not realized, and once the sealing surface of the gate plate or the valve seat is damaged, the manual gate valve can only be replaced; the manual gate valve has no mechanical limit and has the problem of passing, and the technical scheme provided by the invention is as follows:
preferably: the manual ball valve comprises a manual valve body, a manual valve side valve body, a manual valve spool group, a manual valve retainer ring, a manual valve thrust gasket, a manual valve bush, a manual valve rod and a manual valve support.
Preferably: the manual valve core set comprises a manual valve left valve seat, a manual valve ball body and a manual valve right valve seat, the left end and the right end of the manual valve ball body are respectively installed in a matching mode with the manual valve left valve seat and the manual valve right valve seat, the manual valve left valve seat is installed inside the manual valve body, the right side of the manual valve left valve seat is connected with the manual valve body through a manual valve disc spring, the left end of the manual valve right valve seat is installed inside the manual valve body, the right end of the manual valve right valve seat is installed inside the manual valve body, and the manual valve body is connected with the manual valve body through a manual valve wound gasket.
Preferably: the outer side of the valve rod of the manual valve is in clearance fit with the manual valve bush, and the inner side of the valve body of the manual valve is in threaded fit with the outer side of the manual valve bush.
Preferably: the pneumatic valve side valve body and the manual valve body are integrally processed and formed.
The electromagnetic relief device aims to solve the problems that the existing electromagnetic relief device is long in time in the process from the start of closing the valve to the complete closing, a medium quickly passes through a tiny gap between the valve seat and the valve clack in the closing process, the erosion of a sealing surface is serious, and once the erosion is serious, the erosion becomes more serious. Long-time gas erosion, the sealed face damages problem more and more serious, and its technical scheme is:
a working method of a pneumatic relief device comprises the following steps:
when the pneumatic valve normally works, a manual valve ball body of the manual ball valve is collinear with a manual valve flow passage, the manual ball valve is in an opening position, a pneumatic actuator of a pneumatic relief valve is in an air inlet state, the pneumatic valve ball body is perpendicular to the pneumatic valve flow passage, the pneumatic relief ball valve is in a closing position, and a sealing surface of the pneumatic valve ball body is in close contact with a sealing surface of a right valve seat of the pneumatic valve under the combined action of medium force and pneumatic valve disc spring compression force transmitted to the pneumatic valve ball body through a left valve seat of the pneumatic valve to realize sealing;
when the boiler is in overpressure, the manual ball valve is in an opening position, the pneumatic actuator of the pneumatic relief valve loses air, the ball body of the pneumatic valve is collinear with the flow channel of the pneumatic valve, the pneumatic relief valve is opened to discharge redundant steam in the boiler, when the pressure of the boiler returns to a normal value, the pneumatic actuator enters air, the ball body of the pneumatic valve is perpendicular to the flow channel of the pneumatic valve, and the pneumatic relief valve is closed;
when the pneumatic relief valve is in fault maintenance, the manual ball valve is manually closed through the manual actuating mechanism, the manual valve ball body is perpendicular to the manual valve flow channel, the sealing surface of the manual valve ball body is in close contact with the sealing surface of the right valve seat of the manual valve under the combined action of medium force and manual valve disc spring compression force transmitted to the manual valve ball body through the left valve seat of the manual valve, sealing is achieved, and the pneumatic relief valve is maintained.
The invention has the following beneficial effects:
1. according to the pneumatic relief device, the pneumatic relief valve and the manual ball valve are of metal hard seal floating ball structures, the flow channel is regular, the valve is equivalent to a pipeline when being fully opened, the medium fluid resistance is small, and the valve discharge coefficient is large;
2. according to the pneumatic relief device, the pneumatic relief valve is of a floating ball valve structure, the pneumatic actuator drives the valve to open and close, the number of parts is small, the structure is simple, the number of outer leakage points is small, the ball body of the pneumatic relief valve is tightly contacted with the right valve seat, when the pneumatic relief valve is opened, a medium is not easy to enter a sealing surface area, jamming is avoided, the action is sensitive, and the like;
3. according to the pneumatic relief device, the valve bodies of the pneumatic relief valve and the manual ball valve, the side valve body and the upper end face and the lower end face of the right valve seat are in tight contact, metal-to-metal sealing is realized, the winding gaskets are additionally arranged on the valve bodies and the side valve body, double sealing is realized, sealing is reliable, and the price of the sealing element is much lower than that of a C-shaped ring;
4. according to the pneumatic relief device, the pneumatic actuator is opened by the air-out valve, when the boiler is in overpressure, the pneumatic actuator loses air, the valve is quickly opened, and the internal pressure of the boiler is quickly reduced;
5. according to the pneumatic relief device, the manual ball valve is a partial rotary valve, the manual 90-degree switch is adopted, the switch is rapid, the sealing surface of the ball body or the valve seat is damaged, the ball body is replaced, the left valve seat and the right valve seat are integrally replaced, the valve can be continuously used, the limit screw is arranged on the manual ball valve support, and the phenomenon of over-closing of the valve does not exist.
Drawings
FIG. 1 is a front view of a pneumatic vent apparatus;
FIG. 2 is a cross-sectional view of a pneumatic vent;
FIG. 3 is a schematic structural view of the manual ball valve of the present invention;
FIG. 4 is a schematic view of the construction of the pneumatic relief valve of the present invention;
in the figure 1-pneumatic bleed valve, 101-pneumatic valve body, 102-pneumatic valve side body, 103-pneumatic valve disc spring, 104-pneumatic valve left valve seat, 105-pneumatic valve ball, 106-pneumatic valve right valve seat, 107-pneumatic valve wound gasket, 108-pneumatic valve flow channel, 109-pneumatic valve thrust gasket, 110-pneumatic valve bush, 111-pneumatic valve stem, 112-pneumatic valve support, 113-pneumatic actuator, 114-pneumatic valve spool group, 2-manual ball valve, 201-manual valve body, 202-manual valve side body, 203-manual valve disc spring, 204-manual valve left valve seat, 205-manual valve ball, 206-manual valve right valve seat, 207-manual valve wound gasket, 208-manual valve flow channel, 209-manual valve thrust gasket, 210-manual valve bush, 211-manual valve rod, 212-manual valve bracket, 213-manual actuator and 214-manual valve core group.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and includes but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection includes but is not limited to threaded connection, snap connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, at least one connection mode can be found in the existing connection modes by default to realize the function, and the skilled person can select according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 4, and the pneumatic relief device of the embodiment comprises a pneumatic relief valve 1 and a manual ball valve 2 fixedly communicated with the pneumatic relief valve, wherein a medium sequentially flows through the manual ball valve 2 and the pneumatic relief valve 1; the manual ball valve 2 and the pneumatic relief valve 1 are fixedly connected, the arrangement ensures that the flow channel inside the device is regular, the medium resistance is small, the structure is simple, the opening and closing are smooth and rapid, the leakage points are few, the influence of the temperature on the sealing ring is small, the interchangeability is good, the maintenance is convenient, the mechanical limit is realized, and the over-closing phenomenon does not exist, the pneumatic relief valve 1 is used for a protection device before the action of the boiler overpressure safety valve, and the pneumatic relief valve 1 is controlled to be opened by an electric signal to remove the redundant steam of the boiler.
The pneumatic relief valve 1 comprises an air-operated valve body 101, an air-operated valve side valve body 102, an air-operated valve core group 114, an air-operated valve retainer ring 110, an air-operated valve thrust washer 109, an air-operated valve bush 110, an air-operated valve rod 111 and an air-operated valve support 112, wherein the air-operated valve side valve body 102 is installed on the right side of the air-operated valve body 101, the air-operated valve core group 114 is installed inside the air-operated valve side valve body 102, an air-operated valve flow channel 108 communicated with the air-operated valve body 101 and the air-operated valve core group 114 are processed inside the air-operated valve body 101, the air-operated valve support 112 is installed on the top of the air-operated valve body 101, the bottom of the air-operated valve rod 111 penetrates through the air-operated valve support 112 and the air-operated valve body 101 in sequence and then is connected with the air-operated valve core group 114, the top of the air-operated valve rod 111 is connected with the air-operated valve body 101 through the air-operated valve bush 110 and the air-operated valve thrust washer 109 sleeved from top to bottom in sequence, the pneumatic valve bracket 112 is provided with a limit screw.
The pneumatic valve core group 114 comprises a pneumatic valve left valve seat 104, a pneumatic valve ball 105 and a pneumatic valve right valve seat 106, the left end and the right end of the pneumatic valve ball 105 are respectively matched with the pneumatic valve left valve seat 104 and the pneumatic valve right valve seat 106, the pneumatic valve left valve seat 104 is installed inside the pneumatic valve body 101, the right side is connected with the pneumatic valve body 101 through a pneumatic valve disc spring 103, the left end of the pneumatic valve right valve seat 106 is installed in the pneumatic valve body 101, the right end of the pneumatic valve right valve seat 106 is installed in the pneumatic valve side valve body 102, and the pneumatic valve body 101 is connected with the pneumatic valve side valve body 102 through a pneumatic valve winding gasket 107.
The pneumatic valve disc spring 103, the pneumatic valve left valve seat 104, the pneumatic valve ball 105, the pneumatic valve right valve seat 106 are arranged in the pneumatic valve body 101, and are communicated with the pneumatic valve body 101 and the pneumatic valve side valve body 102 to form a pneumatic valve flow channel 108 which is in left-in and right-out, the pneumatic valve thrust washer 109 and the pneumatic valve bush 110 are inserted from the free end of the pneumatic valve rod 111 in a sliding mode, the pneumatic valve rod 111 and the pneumatic valve thrust washer 109 and the pneumatic valve bush 110 penetrate through the pneumatic valve body 101 together and extend to the top of the pneumatic valve ball 105, the pneumatic valve bush 110 is in threaded connection with the pneumatic valve side valve body 102, and the pneumatic valve support 112 is fixedly connected with the pneumatic valve bush 110.
The outer side of the air-operated valve stem 111 is in clearance fit with the air-operated valve bush 110, and the inner side of the air-operated valve body 101 is in threaded fit with the outer side of the air-operated valve bush 110.
The manual ball valve 2 comprises a manual valve body 201, a manual valve side valve body 202, a manual valve core group 214, a manual valve retainer ring 210, a manual valve thrust gasket 209, a manual valve bush 210, a manual valve rod 211 and a manual valve bracket 212, the manual valve body 202 is installed on the right side of the manual valve body 201, the manual valve spool group 214 is installed inside the manual valve body 202, the manual valve body 201, the manual valve body 202 and the manual valve spool group 214 are internally provided with communicated manual valve runners 208, the manual valve support 212 is installed on the top of the manual valve body 201, the bottom of the manual valve rod 211 sequentially penetrates through the manual valve support 212 and the manual valve body 201 and then is connected with the manual valve spool group 214, the top of the manual valve rod 211 is connected with the pneumatic actuator 114, and the outer side of the manual valve rod 211 sequentially penetrates through the manual valve bush 210 and the manual valve thrust gasket 209 from top to bottom to be connected with the manual valve body 201.
The manual valve core set 214 comprises a manual valve left valve seat 204, a manual valve ball 205 and a manual valve right valve seat 206, the left end and the right end of the manual valve ball 205 are respectively installed in a matching manner with the manual valve left valve seat 204 and the manual valve right valve seat 206, the manual valve left valve seat 204 is installed inside the manual valve body 201, the right side of the manual valve left valve seat is connected with the manual valve body 201 through a manual valve disc spring 203, the left end of the manual valve right valve seat 206 is installed inside the manual valve body 201, the right end of the manual valve right valve seat 206 is installed inside the manual valve side valve body 202, and the manual valve body 201 is connected with the manual valve side valve body 202 through a manual valve wound gasket 207.
The outer side of the manual valve stem 211 is in clearance fit with the manual valve bush 210, and the inner side of the manual valve body 201 is in threaded fit with the outer side of the manual valve bush 210.
The pneumatic valve flow passage 108 communicates with the manual valve flow passage 208, the inner diameters of the flow passages are the same, and a medium flows into the pneumatic valve flow passage 108 from the manual valve flow passage 208.
The right side of the pneumatic valve side valve body 102 is connected with the left side of the manual valve body 201, the pneumatic valve side valve body 102 and the manual valve body 201 are integrally processed and formed, or the pneumatic valve side valve body 102 and the manual valve body 201 are connected through interface welding.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1 to 4, and based on a first embodiment, an operation method of a pneumatic relief device of the present embodiment is as follows:
during normal work, a manual valve ball body 205 of the manual ball valve 2 is collinear with a manual valve flow passage 208, the manual ball valve 2 is in an opening position, a pneumatic actuator 114 of the pneumatic relief valve 1 is in an air inlet state, a pneumatic valve ball body 105 is perpendicular to a pneumatic valve flow passage 108, the pneumatic relief ball valve 1 is in a closing position, a sealing surface of the pneumatic valve ball body 105 is in close contact with a sealing surface of a pneumatic valve right valve seat 106 under the combined action of medium force and compression force of a pneumatic valve disc spring 104 transmitted to the pneumatic valve ball body 105 through a pneumatic valve left valve seat 104, and sealing is achieved;
when the boiler is in overpressure, the manual ball valve 2 is in an opening position, the pneumatic actuator 114 of the pneumatic relief valve 1 loses air, the pneumatic valve ball body 105 is collinear with the pneumatic valve flow channel 108, the pneumatic relief valve 1 is opened to discharge redundant steam in the boiler, when the boiler pressure returns to a normal value, the pneumatic actuator 114 enters air, the pneumatic valve ball body 105 is perpendicular to the pneumatic valve flow channel 108, and the pneumatic relief valve 1 is closed;
when the pneumatic relief valve 1 is subjected to troubleshooting, the manual ball valve 2 is manually closed through the manual execution mechanism 213, the manual valve ball body 205 is perpendicular to the manual valve flow channel 208, the sealing surface of the manual valve ball body 205 is in close contact with the sealing surface of the manual valve right valve seat 206 under the combined action of medium force and the compression force of the manual valve disc spring 203 transmitted to the manual valve ball body 205 through the manual valve left valve seat 204 by the manual valve ball body 205, sealing is achieved, and the pneumatic relief valve 1 is subjected to troubleshooting.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A pneumatic vent apparatus, characterized by: the medium-pressure automatic control valve comprises a pneumatic relief valve (1) and a manual ball valve (2) communicated and fixed with the pneumatic relief valve, wherein the medium flows through the manual ball valve (2) and the pneumatic relief valve (1) in sequence;
the pneumatic relief valve (1) comprises a pneumatic valve body (101), a pneumatic valve side valve body (102), a pneumatic valve spool group (114), a pneumatic valve retainer ring (110), a pneumatic valve thrust gasket (109), a pneumatic valve bushing (110), a pneumatic valve stem (111) and a pneumatic valve support (112), wherein the pneumatic valve side valve body (102) is installed on the right side of the pneumatic valve body (101), the pneumatic valve spool group (114) is installed inside the pneumatic valve side valve body (102), the pneumatic valve body (101), the pneumatic valve side valve body (102) and the pneumatic valve spool group (114) are internally processed with communicated pneumatic valve runners (108), the pneumatic valve support (112) is installed at the top of the pneumatic valve body (101), the bottom of the pneumatic valve stem (111) penetrates through the pneumatic valve support (112) and the pneumatic valve body (101) in sequence and then is connected with the pneumatic valve spool group (114), and the top of the pneumatic valve stem (111) is connected with a pneumatic execution mechanism (114), the outer side of the pneumatic valve rod (111) is connected with the pneumatic valve body (101) sequentially through a sleeved pneumatic valve bush (110) and a pneumatic valve thrust gasket (109) from top to bottom.
2. A pneumatic relief device according to claim 1, wherein: the pneumatic valve core group (114) comprises a pneumatic valve left valve seat (104), a pneumatic valve ball body (105) and a pneumatic valve right valve seat (106), the left end and the right end of the pneumatic valve ball body (105) are respectively matched with the pneumatic valve left valve seat (104) and the pneumatic valve right valve seat (106) to be installed, the pneumatic valve left valve seat (104) is installed inside the pneumatic valve body (101), the right side is connected with the pneumatic valve body (101) through a pneumatic valve disc spring (103), the left end of the pneumatic valve right valve seat (106) is installed inside the pneumatic valve body (101), the right end of the pneumatic valve right valve seat (106) is installed inside the pneumatic valve side valve body (102), and the pneumatic valve body (101) is connected with the pneumatic valve side valve body (102) through a pneumatic valve winding gasket (107).
3. A pneumatic relief device according to claim 2, wherein: the outer side of the pneumatic valve stem (111) is in clearance fit with the pneumatic valve bush (110), and the inner side of the pneumatic valve body (101) is in threaded fit with the outer side of the pneumatic valve bush (110).
4. A pneumatic tapping device according to any one of claims 1-3, wherein: the manual ball valve (2) comprises a manual valve body (201), a manual valve side valve body (202), a manual valve spool group (214), a manual valve retainer ring (210), a manual valve thrust gasket (209), a manual valve bushing (210), a manual valve stem (211) and a manual valve support (212), wherein the manual valve side valve body (202) is installed on the right side of the manual valve body (201), the manual valve spool group (214) is installed inside the manual valve side valve body (202), a communicated manual valve runner (208) is processed inside the manual valve body (201), the manual valve side valve body (202) and the manual valve spool group (214), the manual valve support (212) is installed on the top of the manual valve body (201), the bottom of the manual valve stem (211) sequentially penetrates through the manual valve support (212) and the manual valve body (201) and then is connected with the manual valve spool group (214), and the top of the manual valve stem (211) is connected with a pneumatic execution mechanism (114), the outer side of the valve rod (211) of the manual valve is connected with the valve body (201) of the manual valve sequentially through a manual valve bush (210) and a manual valve thrust gasket (209) which are sleeved from top to bottom.
5. A pneumatic bleed device as in claim 4, wherein: the manual valve core group (214) comprises a manual valve left valve seat (204), a manual valve ball body (205) and a manual valve right valve seat (206), the left end and the right end of the manual valve ball body (205) are respectively matched with the manual valve left valve seat (204) and the manual valve right valve seat (206), the manual valve left valve seat (204) is installed inside the manual valve body (201), the right side of the manual valve left valve seat is connected with the manual valve body (201) through a manual valve disc spring (203), the left end of the manual valve right valve seat (206) is installed inside the manual valve body (201), the right end of the manual valve right valve seat (206) is installed inside the manual valve side valve body (202), and the manual valve body (201) is connected with the manual valve side valve body (202) through a manual valve wound gasket (207).
6. A pneumatic bleed device as in claim 5, wherein: the outer side of the manual valve rod (211) is in clearance fit with the manual valve bush (210), and the inner side of the manual valve body (201) is in threaded fit with the outer side of the manual valve bush (210).
7. A pneumatic bleed device as in claim 5, wherein: the pneumatic valve side valve body (102) and the manual valve body (201) are integrally machined and formed.
8. A working method of a pneumatic relief device, which is realized on the pneumatic relief device according to any one of claims 1-7, and is characterized in that:
during normal work, a manual valve ball body (205) of the manual ball valve (2) is collinear with a manual valve flow passage (208), the manual ball valve (2) is at an opening position, a pneumatic actuator (114) of the pneumatic relief valve (1) is in an air inlet state, a pneumatic valve ball body (105) is perpendicular to a pneumatic valve flow passage (108), the pneumatic relief valve (1) is at a closing position, and a sealing surface of the pneumatic valve ball body (105) is in close contact with a sealing surface of a pneumatic valve right valve seat (106) under the combined action of medium force and pneumatic valve disc spring (104) compression force transmitted to the pneumatic valve ball body (105) through a pneumatic valve left valve seat (104), so that sealing is realized;
when the boiler is in overpressure, the manual ball valve (2) is in an opening position, a pneumatic actuator (114) of the pneumatic relief valve (1) loses air, a pneumatic valve ball body (105) is collinear with a pneumatic valve flow channel (108), the pneumatic relief valve (1) is opened, redundant steam in the boiler is discharged, when the boiler pressure returns to a normal value, the pneumatic actuator (114) enters air, the pneumatic valve ball body (105) is perpendicular to the pneumatic valve flow channel (108), and the pneumatic relief valve (1) is closed;
when the pneumatic relief valve (1) is subjected to fault maintenance, the manual ball valve (2) is manually closed through the manual execution mechanism (213), the manual valve ball body (205) is perpendicular to the manual valve flow channel (208), the sealing surface of the manual valve ball body (205) is in close contact with the sealing surface of the manual valve right valve seat (206) under the combined action of medium force and the compression force of the manual valve disc spring (203) transmitted to the manual valve ball body (205) through the manual valve left valve seat (204), sealing is achieved, and maintenance is performed on the pneumatic relief valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111050170.7A CN113775786A (en) | 2021-09-08 | 2021-09-08 | Pneumatic discharge device and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111050170.7A CN113775786A (en) | 2021-09-08 | 2021-09-08 | Pneumatic discharge device and working method thereof |
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| CN113775786A true CN113775786A (en) | 2021-12-10 |
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| CN202111050170.7A Pending CN113775786A (en) | 2021-09-08 | 2021-09-08 | Pneumatic discharge device and working method thereof |
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Application publication date: 20211210 |
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