CN106949295B - Two-stage opening selection valve - Google Patents
Two-stage opening selection valve Download PDFInfo
- Publication number
- CN106949295B CN106949295B CN201710311976.4A CN201710311976A CN106949295B CN 106949295 B CN106949295 B CN 106949295B CN 201710311976 A CN201710311976 A CN 201710311976A CN 106949295 B CN106949295 B CN 106949295B
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- valve
- piston
- pressure arm
- valve body
- ejector rod
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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
- F16K31/44—Mechanical 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
Abstract
The invention relates to a two-stage opening selection valve, and belongs to the technical field of fire-fighting equipment. The selector valve includes: the valve comprises a valve body and a valve core arranged in the valve body; the valve core comprises a cylinder cap, a mandril and a piston; the cylinder cap is arranged at the top of the valve body, and the top of the cylinder cap is provided with a through hole; the ejector rod is arranged in the through hole and forms dynamic seal with the through hole; the piston is positioned below the ejector rod and is provided with an air inlet and an air inlet valve which are communicated with the upper space and the lower space of the piston; the ejector rod is provided with an air outlet; the top of the valve body is provided with a pressure arm hinged with the valve body; the pressure arm is used for pressing the ejector rod. The two-stage opening selection valve provided by the invention can enable the pressure arm to automatically turn upwards when the pressure arm is not stressed and is in an open state, so that the pressure arm is prevented from being impacted by the ejector rod when the selection valve is opened; under the condition that the pressure arm is in a locked state and is stressed, the jacking force transmitted to the pressure arm and the upward impact of the piston when the selector valve is opened are greatly reduced; the working state and working reliability of the selector valve are drastically improved.
Description
Technical Field
The invention relates to a two-stage opening selection valve, and belongs to the technical field of fire-fighting equipment.
Background
The selective valve is a necessary valve in the gas fire-extinguishing combined distribution system. A selector valve is installed between the manifold and the fire extinguishing piping of the protected area to control the flow of the extinguishing agent to the protected area in the event of a fire.
The selector valve in the prior art mainly comprises a valve body, a valve shaft, a pressure arm and a starting control driving part. When the selection valve is closed, the pressure arm is in a locked state, and the valve is closed by pressing and holding the valve shaft; the selection valve is opened in two stress states, one is that when the pressure arm is in a locking state, working pressure is applied to an inlet of the selection valve, and the pressure arm is opened after the control driving part is started to act; the other is that when the pressure arm is in an open state after the control driving part is started to act, the inlet of the selector valve suddenly applies working pressure to open the selector valve. The inventor finds that no matter which state the selector valve is opened, if the selector valve with DN150 caliber, the pressure or impact force transmitted by the valve shaft to the pressure arm can be up to 26500kg, the pressure arm is impacted and reversed with the valve body after being overturned by the force, and then is impacted with the edge of the upper end of the valve shaft after being reversed, and because the impact force is overlarge, the deformation and the bending of the valve shaft can be caused after several impacts, so that the selector valve cannot normally work and be locked and cannot be used, and the requirement of a standard work reliability test cannot be met.
Disclosure of Invention
The invention aims to solve the technical problems that: the defects of the technology are overcome, and the two-stage opening selection valve capable of reducing the stress or non-stress of the pressure arm to the maximum extent is provided.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a two-stage open selector valve comprising: the valve comprises a valve body and a valve core arranged in the valve body; the valve core comprises a cylinder cap, a mandril and a piston; the cylinder cap is arranged at the top of the valve body, and the top of the cylinder cap is provided with a through hole; the ejector rod is arranged in the through hole of the cylinder cap and forms dynamic seal with the through hole; the ejector rod can move between a first position and a second position relative to the cylinder cap; the piston is positioned below the ejector rod and divides the space in the valve body into an upper part and a lower part, the space at the lower part of the piston is an air inlet of the selection valve, and the piston can move between two positions of closing and opening the air inlet; the piston is provided with an air inlet and an air inlet valve which are communicated with the upper space and the lower space of the piston; the ejector rod is provided with an air outlet; when the ejector rod is located at the first position, the air outlet hole is located in the valve body, and at the moment, an air inlet valve on the piston is in an open state due to the limitation of the ejector rod; when the ejector rod is positioned at the second position, the air outlet is communicated with the space above the piston and the space outside the valve body, and at the moment, the air inlet valve on the piston is in a closed state due to the loss of the limitation of the ejector rod; the top of the valve body is provided with a pressure arm hinged with the valve body and a rotating shaft for controlling the pressure arm to be locked or unlocked; the pressing arm is used for pressing and holding the ejector rod; the area of the top surface of the piston is larger than that of the bottom surface.
The scheme is further improved in that: the piston is made of aluminum alloy or other metal and non-metal materials.
The scheme is further improved in that: the valve body is also provided with a starting control driving part which can push the rotating shaft to rotate.
The scheme is further improved in that: the rotating shaft is also provided with a manual control handle which can control the pressure arm to be in a locked or open state;
the scheme is further improved in that: and a spring is arranged between the pressure arm and the valve body and can push the pressure arm to turn upwards.
According to the two-stage opening selection valve provided by the invention, the traditional valve shaft is designed into two separated parts, namely the piston and the ejector rod, so that the pressure arm is only stressed by the jacking force of the ejector rod with the small diameter under the condition that the pressure arm is in a locked state and is stressed, and the force on the piston is prevented from being directly transmitted to the pressure arm; the pressure difference generated by the difference of the upper area and the lower area of the piston is utilized to automatically and tightly press and close the air inlet of the valve; the air outlet hole on the mandril is used for releasing the pressure of the upper space of the piston, so that the air inlet of the valve is opened; compared with the traditional structure, the whole valve shaft transfers force to the push rod in the pressing arm, so that the stress of the pressing arm is greatly reduced. When the air outlet of the mandril is communicated with the outside, the pressure in the upper space of the piston is released relatively slowly, and the upward impact of the opening of the piston is also relieved. Therefore, the problem that the force on the piston is directly transmitted to the pressure arm is solved, the stress condition of a product is greatly improved, and the working state and the working reliability of the selector valve are thoroughly improved; the separating part has simple structure, easy processing and less material consumption, and the piston can be made of aluminum alloy or other metal and non-metal materials. The method solves the problems in the prior art, improves the reliability, safety and economic efficiency of product use, and has great implementation value and social and economic benefits.
Drawings
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of the second state structure of fig. 1.
Fig. 3 is a schematic diagram of the third state structure of fig. 1.
Fig. 4 is a top view of fig. 1.
The numbers in the figures are as follows: 1-valve body, 2-cylinder cap, 3-ejector rod, 4-piston, 5-air inlet valve, 6-pressure arm, 7-starting control driving component, 8-connecting rod, 9-rotating shaft, 10-manual control handle and 11-spring.
Detailed Description
Examples
The two-stage open selector valve of the present embodiment, as shown in fig. 1 to 4, includes: the valve comprises a valve body 1 and a valve core arranged in the valve body 1; the valve core comprises a cylinder cap 2, a mandril 3 and a piston 4; the cylinder cap 2 is arranged on the top of the valve body 1, and the top of the cylinder cap is provided with a through hole; the ejector rod 3 is arranged in the through hole of the cylinder cap 2 and forms dynamic seal with the through hole; the tappet 3 is able to move between a first and a second position with respect to the cylinder head 2 (see figures 1 and 2, respectively); the piston 4 is positioned below the mandril 3, the space in the valve body 1 is divided into an upper part and a lower part, the space below the piston 4 is an air inlet of the selection valve, and the piston 4 can move between two positions for closing and opening the air inlet of the selection valve; the piston 4 is provided with an air inlet and an air inlet valve 5 which are communicated with the upper space and the lower space of the piston 4; the ejector rod 3 is provided with an air outlet; when the ejector rod 3 is located at the first position (see fig. 1), the air outlet hole is located in the valve body 1, and at the moment, the air inlet valve 5 on the piston is in an open state due to the limitation of the ejector rod 3; when the ejector rod 3 is located at the second position (see fig. 2), the air outlet is communicated with the upper space of the piston 4 and the outer space of the valve body 1, and at the moment, the air inlet valve 5 on the piston 4 is in a closed state due to the loss of the limitation of the ejector rod 3; the top of the valve body 1 is provided with a pressure arm 6 which is hinged with the valve body 1 and a rotating shaft 9 which controls the pressure arm 6 to be in a locked or opened state; the pressing arm 6 is used for pressing the ejector rod 3; a spring 11 is arranged between the pressure arm 6 and the valve body 1, and the spring 11 can push the pressure arm 6 to turn upwards. The valve body 1 is also provided with a starting control driving part 7 which can push the rotating shaft 9 to rotate. The piston 4 is made of aluminum alloy or other metal and non-metal materials; a notch is processed on the rotating shaft 9 and used for locking or unlocking the pressure arm 6; the starting control driving part 7 drives a rotating shaft 9 through a connecting rod 8; the manual control handle 10 may also drive the shaft 9.
The two-stage opening selector valve of the embodiment has two working states, and the working principles are as follows:
one situation is (see fig. 1), when the pressure arm is in a locked state, working pressure is applied to an inlet of the selection valve, because the piston 4 and the ejector rod 3 are two independent parts, and because the piston 4 is provided with the air inlet hole and the air inlet valve 5, in this state, because the air inlet valve 5 on the piston 4 is limited by the ejector rod 3, the air inlet valve 5 is in an open state, air at an air inlet of the selection valve enters the upper space of the piston 4 through the air inlet hole on the piston, the downward pressure is applied to the upper end of the piston 4, and the pressure at the lower end of the piston 4 is counteracted, in this state, the pressure arm 6 is only subjected to the jacking force of the small-diameter ejector rod 3, the force on the piston 4 is prevented from being directly transmitted to the pressure arm 6, and the stress state of the pressure arm 6 is greatly improved. When the rotating shaft 9 acts (can be driven by the starting control driving part 7, and can also be driven by the handle 10) to enable the pressure arm 6 to be in an open state, the force on the pressure arm 6 is released and overturned, the ejector rod 3 moves upwards under the action of force, the air outlet hole in the ejector rod 3 is communicated with the outside, the state is shown in the figure 2, the pressure in the upper space of the piston 4 is released, at the moment, the air inlet valve 5 in the piston 4 is in a closed state due to the loss of the limitation of the ejector rod 3, the piston 4 is lifted upwards relatively slowly, and the selector valve is opened stably; the open state is shown in fig. 3.
Alternatively (see fig. 1), when the pressure arm is in the locked state, the inlet of the selector valve is not pressed, and when the rotating shaft 9 is operated to open the pressure arm 6, the inlet of the selector valve suddenly applies working pressure to open the selector valve (see fig. 3). At this time, since the air inlet valve 5 on the piston 4 is not limited by the push rod 3, the air inlet valve 5 will be in a closed state after the inlet of the selector valve suddenly applies working pressure, and the force on the piston 4 will be completely transmitted to the push rod 3. However, because a spring 11 (see fig. 4) is arranged between the pressure arm 6 and the valve body 1, the pressure arm 6 is overturned upwards before the action of the piston 4 and the ejector rod 2 under the action of the spring 11, so that the impact of the pressure arm 6 on the piston 4 and the ejector rod 3 when the selector valve is opened is avoided. The impact causes the pressure arm 6 to rotate reversely after colliding with the valve body 1 and seriously collide the ejector rod 3, so that the ejector rod 3 is deformed and the selection valve cannot work normally.
The present invention is not limited to the specific technical solutions described in the above embodiments, and the present invention may have other embodiments in addition to the above embodiments. All technical solutions formed by equivalent substitutions fall within the scope of the claims of the present invention.
Claims (6)
1. A two-stage opening selector valve comprising: the valve comprises a valve body and a valve core arranged in the valve body; the method is characterized in that: the valve core comprises a cylinder cap, a mandril and a piston; the cylinder cap is arranged on the top of the valve body; the top of the cylinder cap is provided with a through hole, and the ejector rod is arranged in the through hole and forms dynamic seal with the through hole; the ejector rod can move between a first position and a second position relative to the cylinder cap; the piston is positioned below the ejector rod and divides the space in the valve body into an upper part and a lower part, the space below the piston is an air inlet of the selector valve, and the piston can move between two positions for closing and opening the air inlet; the piston is provided with an air inlet and an air inlet valve which are communicated with the upper space and the lower space of the piston; the ejector rod is provided with an air outlet; when the ejector rod is located at the first position, the air outlet is located in the valve body, and at the moment, an air inlet valve on the piston is in an opening state; when the ejector rod is located at the second position, the air outlet is communicated with the space above the piston and the space outside the valve body; at the moment, an air inlet valve on the piston is in a closed state; the top of the valve body is provided with a pressure arm hinged with the valve body and a rotating shaft for controlling the pressure arm to be locked or unlocked.
2. The two-stage opening selector valve of claim 1, wherein: the piston is made of aluminum alloy or other metal and non-metal materials.
3. The two-stage open selector valve of claim 1, wherein: the area of the top surface of the piston is larger than that of the bottom surface.
4. The two-stage open selector valve of claim 1, wherein: the valve body is also provided with a starting control driving part which can push the rotating shaft to rotate.
5. The two-stage opening selector valve of claim 1, wherein: the rotating shaft is also provided with a manual control handle which can control the pressure arm to be in a locked or open state.
6. The two-stage opening selector valve of claim 1, wherein: and a spring is arranged between the pressure arm and the valve body and can push the pressure arm to turn upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311976.4A CN106949295B (en) | 2017-05-05 | 2017-05-05 | Two-stage opening selection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311976.4A CN106949295B (en) | 2017-05-05 | 2017-05-05 | Two-stage opening selection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106949295A CN106949295A (en) | 2017-07-14 |
| CN106949295B true CN106949295B (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710311976.4A Active CN106949295B (en) | 2017-05-05 | 2017-05-05 | Two-stage opening selection valve |
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| Country | Link |
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| CN (1) | CN106949295B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105239A (en) * | 2006-07-11 | 2008-01-16 | 上海清能燃料电池技术有限公司 | Minitype gas pressure-reducing valve |
| JP2009068607A (en) * | 2007-09-13 | 2009-04-02 | Canon Anelva Technix Corp | Valve opening and closing device and vacuum processing device |
| CN202629087U (en) * | 2012-04-10 | 2012-12-26 | 杭州飞宝传动科技有限公司 | Selector valve for metro fire extinguishing system |
| CN103322207A (en) * | 2013-06-14 | 2013-09-25 | 刘工勤 | Micro-strength switching valve |
| CN103925391A (en) * | 2014-04-25 | 2014-07-16 | 宁波南车时代传感技术有限公司 | Two-position three-way valve with air control end |
| CN206770748U (en) * | 2017-05-05 | 2017-12-19 | 南京消防器材股份有限公司 | A kind of two-stage opens selector valve |
-
2017
- 2017-05-05 CN CN201710311976.4A patent/CN106949295B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105239A (en) * | 2006-07-11 | 2008-01-16 | 上海清能燃料电池技术有限公司 | Minitype gas pressure-reducing valve |
| JP2009068607A (en) * | 2007-09-13 | 2009-04-02 | Canon Anelva Technix Corp | Valve opening and closing device and vacuum processing device |
| CN202629087U (en) * | 2012-04-10 | 2012-12-26 | 杭州飞宝传动科技有限公司 | Selector valve for metro fire extinguishing system |
| CN103322207A (en) * | 2013-06-14 | 2013-09-25 | 刘工勤 | Micro-strength switching valve |
| CN103925391A (en) * | 2014-04-25 | 2014-07-16 | 宁波南车时代传感技术有限公司 | Two-position three-way valve with air control end |
| CN206770748U (en) * | 2017-05-05 | 2017-12-19 | 南京消防器材股份有限公司 | A kind of two-stage opens selector valve |
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| Publication number | Publication date |
|---|---|
| CN106949295A (en) | 2017-07-14 |
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