CN111503330A - Automatic safe drainage exhaust valve with forced opening and closing function - Google Patents
Automatic safe drainage exhaust valve with forced opening and closing function Download PDFInfo
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- CN111503330A CN111503330A CN202010229870.1A CN202010229870A CN111503330A CN 111503330 A CN111503330 A CN 111503330A CN 202010229870 A CN202010229870 A CN 202010229870A CN 111503330 A CN111503330 A CN 111503330A
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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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/26—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in either direction
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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
- F16K17/20—Excess-flow 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
- F16K31/0679—Electromagnet aspects, e.g. electric supply therefor with more than one energising coil
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses an automatic safe drainage exhaust valve with a forced opening and closing function, and relates to the technical field of drainage valves. The double-valve-seat valve comprises a valve body, a forced opening coil, a forced closing coil, a double-position valve seat and a double-head valve core; one end of the double-end valve core is connected with the inner end part of the forced closing coil end through an optical position elastic part, and the other end of the double-end valve core is connected with the inner end part of the forced opening coil end through an opening position elastic part; the safe drainage and exhaust valve is realized through the initial elastic force of the open position elastic part and the closed position elastic part and the equivalent area of the two ends of the double-head valve core. The invention realizes the safe drainage and exhaust valve: when the system pressure is lower than a certain limit value, the valve is kept closed; when the system pressure is larger than a certain limit value, the valve is automatically opened; when the system pressure continues to rise to a certain limit value, the valve can still automatically close; the device has the advantages of simple structure, economical manufacturing cost and the like, and is suitable for being used under medium conditions of normal temperature, high pressure, high temperature, high pressure and the like.
Description
Technical Field
The invention belongs to the technical field of drain valves, and particularly relates to an automatic safe drain exhaust valve with a forced opening and closing function.
Background
The invention relates to an automatic safe drainage and exhaust valve with a forced opening and closing function, which has the valve opening and closing capacity under passive and active conditions, namely, the valve opening and closing capacity can be automatically closed under the low-pressure and high-pressure conditions of a system, can be automatically opened under the medium-pressure condition of the system, has the function of forced opening and closing within the full design pressure range, and can be applied to the drainage and exhaust requirements of automatic instrument equipment under the high-temperature, high-pressure, normal-temperature and high-pressure conditions of chemical industry, power plants and the like.
The drainage and exhaust valve is a common valve of a thermal system, and the valve is mainly used for drainage and exhaust of the system so as to meet the requirements of measurement of a pressure difference transmitter, establishment of a steam space by a voltage stabilizer and the like. At present, the valves are mainly opened and closed in a manual, pneumatic and electric mode, and the opening and closing processes of the valves need to be realized manually or by setting programs. Because on loop system, drainage discharge valve is in large quantity, reaches several hundreds even thousands often, and artificial operation work load is big, misses easily, leads to the system debugging operation to have great human error risk. The invention realizes the functions of automatically opening the drainage exhaust valve within the specified pressure range and automatically closing the drainage exhaust valve outside the specified pressure range in a mechanical and electromagnetic mode, does not need to manually act during the normal operation of the system, and meets the operation requirement. The invention relates to a safe drainage and exhaust valve which consists of an open position elastic part, a close position elastic part, a double-head valve core, a double-position valve seat, a forced opening coil, a forced closing coil, an outflow hole, an inflow hole and a valve body, wherein the safe drainage and exhaust valve can be realized by designing the initial elastic force of the open position elastic part and the close position elastic part and the equivalent area of two ends of the double-head valve core: the automatic switch-on/off function is realized under the conditions of low pressure and high pressure of the system, and the automatic switch-on/off function is realized under the condition of medium pressure of the system and is forced to be on and off within the full design pressure range. The invention has the advantages of simple structure, economic manufacturing cost and the like, is suitable for being used under medium conditions of normal temperature, high pressure, high temperature, high pressure and the like, and meets the use requirements of chemical engineering, power plants and the like.
The drain outlet valve has various structures, e.g.
The pressure relief valve invention patent with application number 201510416693.7 provides a pressure relief valve comprising: the valve body is provided with a water inlet and a water outlet; the valve core is arranged in the valve body and is close to the water inlet, the valve core comprises a valve rod and a valve seat, and a plurality of water through holes are formed in the valve seat; the separation blade is arranged in the valve body and close to the water outlet, and the separation blade is sleeved on the valve rod; the spring is sleeved on the valve rod and supported between the valve seat and the blocking piece. According to the pressure release valve provided by the invention, the valve seat of the valve core is provided with the water through holes, so that water flow passes through the valve core to move forwards, the water flow can balance the valve seat, the frequency of the valve seat impacting the valve body is reduced, the valve seat is in surface contact with the valve body, the contact area between the valve seat and the valve body is increased, the noise generated when the valve seat collides with the valve body is reduced, and the purpose of reducing the noise is realized. This patent only possesses the valve automatic opening under high pressure condition, does not possess "close under low pressure condition, the ability of automatic opening under the middling pressure condition", when needs force to open and close simultaneously, needs to pass through other active valves and realizes, on having specific pressure point simultaneously, the valve leads to the gasping condition because of the medium flow is unstable. The valve seat is double-sided sealed, automatic sealing of the valve is realized by the aid of the combined force of the elastic forces of the switch elastic parts under a low-pressure condition, automatic sealing is realized by the aid of pressure difference of an inlet and an outlet of the valve under a high-pressure condition, meanwhile, forced closing is realized by the aid of the electromagnetic coil under a special pressure condition, the problem that sealing is insufficient under the low-pressure condition due to single-sided sealing is solved, the problem that the valve leaks due to surge near a zero limit point of the special pressure is solved, and the valve seat better meets actual requirements of the valve. Therefore, the pressure relief valve disclosed in the invention patent and the pressure relief valve disclosed in the invention patent 201510416693.7 are fundamentally different in structure and function.
The invention discloses a differential exhaust valve with application number 201510147689.5, which is a differential exhaust valve, the appearance of which is a hexagonal column type and is of a differential piston structure, and the differential exhaust valve sequentially performs exhaust, water filling and water stop sealing through the increase of inlet pressure; the design adopts a pneumatic piston and a spring mechanism to carry out open/close control, when the system acts to fill water, compressed air in a pipe network is discharged, and then water is stopped and sealed. The valve seat of the invention is single-sided sealing, so the invention has the defects of insufficient sealing under the low-pressure condition, and the valve is in a leakage state under the low-pressure condition, which brings high requirements for system water supplement. The valve core of the invention generates elasticity in the switch elastic part and generates inference of inlet-outlet pressure difference, and realizes the following effects through corresponding design combination: the valve sealing is realized by utilizing the resultant force of the elastic parts under the condition of low pressure, the water and the air are discharged under the condition of medium pressure, and the sealing is realized under the condition of high pressure. Therefore, the differential exhaust valve of the invention patent and the invention patent 201510416693.7 have fundamentally different structural and functional effects.
At present, the existing valve only has one of functions of low-pressure opening, high-pressure opening and active opening and closing, the actual use requirements of the automatic drainage exhaust valve of 'low-pressure closing, medium-pressure opening and high-pressure closing' are difficult to meet, and the automatic drainage exhaust valve needs to be realized through an active valve or a manual valve.
Disclosure of Invention
The invention provides an automatic safe drainage exhaust valve with a forced opening and closing function, which solves the problems.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an automatic safe drainage exhaust valve with a forced opening and closing function, which comprises a valve body, a forced opening coil and a forced closing coil which are respectively arranged at two ends of the valve body, a double-position valve seat arranged at the middle position in the valve body and a double-head valve core arranged in the valve body;
the valve body is provided with an inflow hole at the end part of the forced closing coil, and an outflow hole at the side part close to one end of the forced opening coil;
one end of the double-head valve core is connected with the inner end part of the forced closing coil end through an optical position elastic part, and the other end of the double-head valve core is connected with the inner end part of the forced opening coil end through an opening position elastic part;
the safe drainage and exhaust valve is realized through the initial elastic force of the open position elastic part and the closed position elastic part and the equivalent area of the two ends of the double-head valve core.
Furthermore, the double-end valve core is formed by integrally processing a stainless steel forging, and the external structure of the double-end valve core is similar to two cones with 7-degree inclination and is formed by connecting a short rod; the double-end valve core slides along the guide rail groove through the guide rail groove arranged on the valve body.
Further, the double-position valve seat is welded inside the valve body, the double-end valve core and the double-position valve seat are mutually extruded to realize valve sealing, the size of a center rod of the double-end valve core is smaller than the size of a center hole of the double-position valve seat, and the maximum diameter of the double-end valve core is larger than the size of the center hole of the double-position valve seat and smaller than the inner diameter of the valve body.
Furthermore, the open position elastic part is made of elastic materials and comprises a spring and a high-temperature-resistant rubber rod material, one end of the open position elastic part is connected with the valve body, the other end of the open position elastic part is connected with the double-head valve core, the open position elastic part is in a compressed state during assembly, and a withdrawing force in the direction of the valve inflow hole is applied to the double-head valve seat.
Furthermore, the closing elastic part is made of elastic materials and comprises a spring and a high-temperature-resistant rubber rod material, one end of the closing elastic part is connected with the valve body, the other end of the closing elastic part is connected with the double-head valve core, the closing elastic part is in a compressed state during assembly, and a withdrawing force in the direction of the valve outflow hole is applied to the double-head valve seat.
Furthermore, the forced opening coil is arranged on the outer side of the valve body and close to the end face of the outflow hole, the double-end valve core is attracted to move towards the forced opening coil after being electrified, and finally the double-end valve core and the double-position valve seat are squeezed mutually to close the valve.
Furthermore, the forced closing coil is arranged on the outer side of the valve body and close to the end face of the inflow hole, the double-end valve core is attracted to move towards the forced closing coil after being electrified, and finally the double-end valve core and the double-position valve seat mutually press the valve to close.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to an automatic safe drainage exhaust valve with a forced opening and closing function, which can realize the safe drainage exhaust valve by designing an open position elastic part, an open position elastic part initial elastic force and two end equivalent areas of a double-end valve core: when the system pressure is lower than a certain limit value, the valve is kept closed; when the system pressure is larger than a certain limit value, the valve is automatically opened; when the system pressure continues to rise to a certain limit value, the valve can still automatically close; the invention has the advantages of simple structure, economic manufacturing cost and the like, is suitable for being used under medium conditions of normal temperature, high pressure, high temperature, high pressure and the like, and meets the use requirements of chemical engineering, power plants and the like.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an automatic safety water discharge and exhaust valve with a forced opening and closing function according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-opening elastic piece, 2-optical position elastic piece, 3-double-head valve core, 4-double-position valve seat, 5-forced opening coil, 6-forced closing coil, 7-outflow hole, 8-inflow hole and 9-valve body.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In the description of the present invention, it is to be understood that the terms "inner", "middle", "side", "one end", "the other end", "center", and the like, indicate orientations or positional relationships and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the automatic safety water discharge and exhaust valve with forced opening and closing function of the present invention comprises a valve body 9, a forced opening coil 5 and a forced closing coil 6 respectively installed at two ends of the valve body 9, a two-position valve seat 4 installed at the middle position inside the valve body 9, and a double-head valve core 3 installed inside the valve body 9;
an inflow hole 8 is formed in the end, located at the forced closing coil 6, of the valve body 9, and an outflow hole 7 is formed in the side portion, located close to one end of the forced opening coil 5, of the valve body;
one end of the double-end valve core 3 is connected with the inner end part at the end of the forced closing coil 6 through the optical position elastic part 2, and the other end of the double-end valve core is connected with the inner end part at the end of the forced opening coil 5 through the opening position elastic part 1;
the safe drainage and exhaust valve is realized through the initial elastic force of the open-position elastic part 1 and the closed-position elastic part 2 and the equivalent area of the two ends of the double-head valve core 3.
The double-end valve core 3 is integrally machined by a stainless steel forging, and the external structure of the double-end valve core is similar to two cones with 7-degree inclination and is formed by connecting a short rod; the double-ended spool 3 slides along the guide rail groove through the guide rail groove installed on the valve body 9.
Wherein, dibit disk seat 4 welds inside valve body 9, and double-end valve core 3 realizes valve seal with dibit disk seat 4 mutual extrusion, and 3 well core rod sizes of double-end valve core are less than dibit disk seat 4 centre bore sizes, and the maximum diameter of double-end valve core 3 is greater than the centre bore size of dibit disk seat 4, is less than the internal diameter of valve body 9.
The open position elastic part 1 is made of elastic materials and comprises a spring and a high-temperature-resistant rubber rod material, one end of the open position elastic part is connected with the valve body 9, the other end of the open position elastic part is connected with the double-head valve core 3, the open position elastic part 1 is in a compressed state during assembly, and a back force in the direction of the valve inflow hole 8 is applied to the double-head valve seat 3.
The off-position elastic part 2 is made of elastic materials and comprises a spring and a high-temperature-resistant rubber rod material, one end of the off-position elastic part is connected with the valve body 9, the other end of the off-position elastic part is connected with the double-end valve core 3, the off-position elastic part 2 is in a compressed state during assembly, and a withdrawing force in the direction of the valve outflow hole 7 is applied to the double-end valve seat 3.
Wherein, force and open coil 5 and install in the valve body 9 outside and be close to the end face of outflow hole 7, attract double-end case 3 to force to open coil 5 direction motion after the circular telegram, realize finally that double-end case 3 and dibit disk seat 4 extrude each other and make the valve close.
Wherein, force and close coil 6 and install in the valve body 9 outside and be close to inflow hole 8 terminal surface department, attract the double-end case 3 to force and close coil 6 direction motion after the circular telegram, finally realize that double-end case 3 and two-position disk seat 4 press the valve door to close each other.
The invention relates to a working process example of an automatic safe drainage exhaust valve with a forced opening and closing function, which comprises the following steps:
under the passive condition, the work flow of the safe drainage and exhaust valve is as follows:
the safe drainage exhaust valve is under the passive condition, and the valve is opened and close mainly to receive the power and is formed by 5 aspects: 1) force generated by inlet medium pressure, 8 inflow-to-bore pressure P88 inflow orifice pressure equivalent area
S8(ii) a 2)2 elastic force F of off-position elastic part23) force generated by outlet medium pressure, 7 inflow-hole pressure P 77 inflow orifice pressure equivalent area S7(ii) a 4)1 spring force of off position spring
F1(ii) a 5)3 double-head valve core inertia force. In the design process, the design optimization result of the inertia force of the 3-head valve core is less than 1% of other force effects, so that the inertia force is ignored. The minimum sealing force of the valve is FX, and therefore the criterion for the valve action can be given by:
f＝P8×S8+F2-(P7×S7+F1)
when | f | is less than FX, the acting force between the 3 double-head valve core and the 4 double-position valve seat is lower than the pressure required by sealing, and the valve is in a long-term opening state;
when | f | ≧ FX, the acting force between the 3-double-head valve core and the 4-double-position valve seat is greater than the pressure required by sealing, and the valve is automatically closed.
To sum up, this valve can realize safe drainage discharge valve: and under the condition of low pressure of the system, the valve is closed, under the condition of medium pressure of the system, the valve is opened, and under the condition of high pressure of the system, the valve is closed. While passing design F2、F1、S8、S7The initial parameters of (2) can set the specific pressure range size of low pressure, medium pressure and high pressure.
Under the active condition, the work flow of the safe drainage and exhaust valve is as follows:
when the safety drain valve needs to be forcibly opened, the 5 forced opening coil is electrified to generate magnetic force to attract the 3 double-head valve core, the acting force between the 3 double-head valve core and the 4 double-position valve seat is greater than the pressure required by sealing, and the valve is forcibly closed.
When the safety drain valve needs to be forcibly closed, the 6 forced closing coil is electrified to generate magnetic force to attract the 3 double-head valve core, the acting force between the 3 double-head valve core and the 4 double-position valve seat is smaller than the pressure required by sealing, and the valve is forcibly opened.
Has the advantages that:
the invention relates to an automatic safe drainage exhaust valve with a forced opening and closing function, which can realize the safe drainage exhaust valve by designing an open position elastic part, an open position elastic part initial elastic force and two end equivalent areas of a double-end valve core: when the system pressure is lower than a certain limit value, the valve is kept closed; when the system pressure is larger than a certain limit value, the valve is automatically opened; when the system pressure continues to rise to a certain limit value, the valve can still automatically close; the invention has the advantages of simple structure, economic manufacturing cost and the like, is suitable for being used under medium conditions of normal temperature, high pressure, high temperature, high pressure and the like, and meets the use requirements of chemical engineering, power plants and the like.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. An automatic safe drainage exhaust valve with a forced opening and closing function is characterized by comprising a valve body (9), a forced opening coil (5) and a forced closing coil (6) which are respectively arranged at two ends of the valve body (9), a two-position valve seat (4) arranged at the middle position in the valve body (9), and a double-head valve core (3) arranged in the valve body (9);
the end part of the valve body (9) positioned at the forced closing coil (6) is provided with an inflow hole (8), and the side part of the valve body positioned at one end of the forced opening coil (5) close to the valve body is provided with an outflow hole (7);
one end of the double-head valve core (3) is connected with the inner end part of the end of the forced closing coil (6) through the optical position elastic part (2), and the other end of the double-head valve core is connected with the inner end part of the end of the forced opening coil (5) through the opening position elastic part (1);
the safety drainage and exhaust valve is realized through the initial elastic force of the open position elastic part (1) and the closed position elastic part (2) and the equivalent area of the two ends of the double-head valve core (3).
2. The automatic safe drainage exhaust valve with the forced opening and closing function according to claim 1 is characterized in that the double-end valve core (3) is integrally processed by a stainless steel forging, and the external structure of the double-end valve core is similar to two cones with 7-degree inclination and is formed by connecting a short rod; the double-end valve core (3) slides along the guide rail groove through the guide rail groove arranged on the valve body (9).
3. The automatic safety drainage exhaust valve with the forced opening and closing function according to claim 1 is characterized in that the double-position valve seat (4) is welded inside the valve body (9), the double-head valve core (3) and the double-position valve seat (4) are mutually extruded to realize valve sealing, the size of a center rod of the double-head valve core (3) is smaller than the size of a center hole of the double-position valve seat (4), and the maximum diameter of the double-head valve core (3) is larger than the size of the center hole of the double-position valve seat (4) and smaller than the inner diameter of the valve body (9).
4. The automatic safety drainage exhaust valve with the forced opening and closing function is characterized in that the open position elastic part (1) is made of elastic materials and comprises a spring and a high-temperature-resistant rubber rod material, one end of the open position elastic part is connected with the valve body (9), the other end of the open position elastic part is connected with the double-head valve core (3), the open position elastic part (1) is in a compressed state during assembly, and a withdrawing force in the direction of the valve inflow hole (8) is applied to the double-head valve seat (3).
5. The automatic safe drainage exhaust valve with the forced opening and closing function is characterized in that the closing elastic part (2) is made of elastic materials and comprises a spring and a high-temperature-resistant rubber rod material, one end of the closing elastic part is connected with the valve body (9), the other end of the closing elastic part is connected with the double-head valve core (3), the closing elastic part (2) is in a compressed state during assembly, and a withdrawing force in the direction of the valve outflow hole (7) is applied to the double-head valve seat (3).
6. The automatic safety drainage exhaust valve with the forced opening and closing function according to claim 1, wherein the forced opening coil (5) is installed on the outer side of the valve body (9) close to the end face of the outflow hole (7), and after the valve body is powered on, the double-head valve core (3) is attracted to move towards the direction of the forced opening coil (5), so that the double-head valve core (3) and the double-position valve seat (4) are extruded mutually to close the valve.
7. The automatic safety drainage exhaust valve with the forced opening and closing function according to claim 1 is characterized in that the forced closing coil (6) is installed at the position, close to the end face of the inflow hole (8), of the outer side of the valve body (9), and the double-head valve core (3) is attracted to move towards the direction of the forced closing coil (6) after the valve body is electrified, so that the double-head valve core (3) and the double-position valve seat (4) are pressed mutually to close the valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010229870.1A CN111503330A (en) | 2020-03-27 | 2020-03-27 | Automatic safe drainage exhaust valve with forced opening and closing function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010229870.1A CN111503330A (en) | 2020-03-27 | 2020-03-27 | Automatic safe drainage exhaust valve with forced opening and closing function |
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| CN111503330A true CN111503330A (en) | 2020-08-07 |
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| CN202010229870.1A Pending CN111503330A (en) | 2020-03-27 | 2020-03-27 | Automatic safe drainage exhaust valve with forced opening and closing function |
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| CN207935491U (en) * | 2017-12-27 | 2018-10-02 | 天津市远大阀门有限公司 | A kind of Double-clack coaxial-type check-valves |
| CN209180436U (en) * | 2018-11-07 | 2019-07-30 | 珠海格力电器股份有限公司 | Limit water yield, the throttle valve of good antiscale property, solenoid valve and water purifier |
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2020
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| CN207814494U (en) * | 2017-12-05 | 2018-09-04 | 郑州中泰安科粉体科技有限公司 | A kind of two-way flame proof valve of absorption type |
| CN207935491U (en) * | 2017-12-27 | 2018-10-02 | 天津市远大阀门有限公司 | A kind of Double-clack coaxial-type check-valves |
| CN209180436U (en) * | 2018-11-07 | 2019-07-30 | 珠海格力电器股份有限公司 | Limit water yield, the throttle valve of good antiscale property, solenoid valve and water purifier |
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