CN111795162A - High-temperature-resistant automatic sealing butterfly valve - Google Patents

High-temperature-resistant automatic sealing butterfly valve Download PDF

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Publication number
CN111795162A
CN111795162A CN202010842254.3A CN202010842254A CN111795162A CN 111795162 A CN111795162 A CN 111795162A CN 202010842254 A CN202010842254 A CN 202010842254A CN 111795162 A CN111795162 A CN 111795162A
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CN
China
Prior art keywords
valve
shaft
valve body
valve shaft
fixedly connected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010842254.3A
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Chinese (zh)
Inventor
殷爱斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Longmai Environmental Protection Equipment Co ltd
Original Assignee
Jiangsu Longmai Environmental Protection Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Longmai Environmental Protection Equipment Co ltd filed Critical Jiangsu Longmai Environmental Protection Equipment Co ltd
Priority to CN202010842254.3A priority Critical patent/CN111795162A/en
Publication of CN111795162A publication Critical patent/CN111795162A/en
Pending legal-status Critical Current

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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
    • F16K1/16—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 with pivoted closure-members
    • F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2268—Sealing means for the axis of rotation
    • 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
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
    • F16K31/043—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • 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
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
    • F16K41/026—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles for rotating valves
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/14—Spindle sealings with conical flange on the spindle which co-operates with a conical surface in the housing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The invention provides a high-temperature-resistant automatic sealing butterfly valve, and relates to the field of butterfly valves. This high temperature resistant self sealing butterfly valve, including the valve body, the inside of valve body is provided with the valve clack, the upper end of valve clack is provided with the valve shaft, the lower extreme fixedly connected with hexagonal kelly of valve shaft, the first O type circle of lower extreme lateral wall fixed connection of valve shaft, the lateral wall of valve shaft and be provided with the toper piece in the top of first O type circle, the lateral wall of valve shaft and be provided with adjusting nut above the toper piece, be provided with the pretension spring between toper piece and the adjusting nut, the lateral wall of valve shaft and the top fixedly connected with second gear at adjusting nut, fixedly connected with driving motor on the valve body, driving motor's upper end extends and is provided with the motor shaft, the lateral wall fixedly connected with first gear of motor shaft. The valve shaft is provided with the pre-tightening spring, so that the sealing performance of the valve shaft can be ensured in the back-and-forth switching of the valve at high temperature and normal temperature.

Description

High-temperature-resistant automatic sealing butterfly valve
Technical Field
The invention relates to the field of butterfly valves, in particular to a high-temperature-resistant automatic sealing butterfly valve.
Background
A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.
The valve shaft of the existing butterfly valve is simple in sealing, and particularly after multiple times of conversion between high temperature and normal temperature, the aging and abrasion speed of a sealing element is greatly increased. The gap between the valve shaft and the valve body is easily leaked.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-temperature-resistant automatic sealing butterfly valve, which solves the problem that the sealing performance of the valve shaft of the existing butterfly valve is poor under the condition of temperature change.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a high-temperature-resistant automatic sealing butterfly valve comprises a valve body, wherein a valve clack is arranged inside the valve body, a valve shaft is arranged at the upper end of the valve clack, a hexagonal clamping rod is fixedly connected at the lower end of the valve shaft, a first O-shaped ring is fixedly connected to the side wall of the lower end of the valve shaft, the number of the first O-shaped rings is two, a conical piece is arranged on the side wall of the valve shaft above the first O-shaped ring, an adjusting nut is arranged on the side wall of the valve shaft above the conical piece, a pre-tightening spring is arranged between the conical piece and the adjusting nut, gaskets are arranged at two ends of the pre-tightening spring, the gaskets below the pre-tightening spring are in contact with the upper end of the conical piece, the gaskets above the pre-tightening spring are in contact with the lower end of the adjusting nut, a second gear is fixedly connected to the side, the upper end of driving motor extends and is provided with the motor shaft, and the motor shaft upwards runs through the inside that the valve body extended to the valve body, the lateral wall of motor shaft and at the first gear of the inside fixedly connected with of valve body, first gear and second gear intermeshing, the upper end of valve body is provided with the apron, the apron is run through to the upper end of valve shaft, the top of apron and at the top fixedly connected with sealing member of valve shaft.
Preferably, one side of the valve clack is provided with a first inner hexagonal clamping groove, and the first inner hexagonal clamping groove is matched with the hexagonal clamping rod.
Preferably, the valve body has an internal cross-sectional profile and is tapered at the taper.
Preferably, the conical member and the valve shaft are in sliding connection, and the adjusting nut and the valve shaft are in threaded connection.
Preferably, an adjusting sleeve is arranged below the sealing element and above the valve shaft, the adjusting sleeve and the cover plate are in threaded connection, and a bayonet is arranged at the upper end of the adjusting sleeve.
Preferably, a second sealing ring is arranged between the sealing element and the cover plate, a first sealing ring is arranged between the cover plate and the valve body, and the first sealing ring and the second sealing ring are made of rubber materials.
Preferably, two second O-shaped rings are arranged between the motor shaft and the valve body, and the first O-shaped ring and the second O-shaped ring are made of rubber.
Preferably, overlook of apron is the calabash shape, the edge of apron is provided with fixing bolt, fixing bolt runs through apron, valve body, fixing bolt's lateral wall just is provided with fixation nut in the below of valve body.
Preferably, the upper end of the valve shaft is provided with a second inner hexagonal clamping groove.
(III) advantageous effects
The invention provides a high-temperature-resistant automatic sealing butterfly valve. The method has the following beneficial effects:
1. according to the invention, three seals are arranged, the first seal is a first O-shaped ring, the second seal is a conical piece, the third seal is a second O-shaped ring, a first seal ring and a third seal ring, especially the second seal ring, the contact area of the conical piece and the inner wall of the valve body is large, the sealing property is favorably improved, even if the valve is changed back and forth at high temperature and normal temperature, the conical piece is only attached to the inner wall of the valve body under the action of a pre-tightening spring, and the sealing property of the valve is ensured.
2. The valve shaft is arranged in the valve body, so that the valve is convenient to open and close, if the driving motor is damaged, the sealing piece can be detached, the valve shaft is rotated by using a tool to realize the opening and closing of the valve, and meanwhile, the valve shaft is positioned in the valve body, so that the sealing performance of the valve is ensured.
3. According to the invention, when the sealing performance between the conical piece and the valve body is reduced, the adjusting sleeve can be rotated to improve the sealing performance between the conical piece and the valve body, when the adjusting sleeve is rotated to be useless, or the adjusting distance influences the meshing transmission of the first gear and the second gear, the cover plate can be opened, and then the adjusting nut is rotated, so that the sealing performance between the conical piece and the valve body is improved, or the conical piece is replaced, the valve has a simple structure, and is easy to disassemble and maintain.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic side view of the valve flap of the present invention;
FIG. 4 is a schematic view of the lower end of the valve shaft of the present invention;
FIG. 5 is a schematic upper end view of the valve shaft of the present invention;
fig. 6 is an enlarged view of a portion a in fig. 1.
Wherein, 1, a first O-shaped ring; 2. a valve shaft; 3. a valve flap; 4. a valve body; 5. a drive motor; 6. fixing a nut; 7. fixing the bolt; 8. a first seal ring; 9. a cover plate; 10. a first gear; 11. a second O-ring; 12. a second gear; 13. adjusting the nut; 14. pre-tightening the spring; 15. a gasket; 16. a conical member; 17. a seal member; 18. a first inner hexagonal clamping groove; 19. a hexagonal clamping rod; 20. a second inner hexagonal clamping groove; 21. an adjustment sleeve; 22. and a second seal ring.
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.
Example (b):
as shown in fig. 1-6, an embodiment of the present invention provides a high temperature resistant automatic sealing butterfly valve, which includes a valve body 4, a valve flap 3 is disposed inside the valve body 4, a valve shaft 2 is disposed at an upper end of the valve flap 3, a hexagonal clamping rod 19 is fixedly connected to a lower end of the valve shaft 2, a lower end side wall of the valve shaft 2 is fixedly connected to a first O-ring 1, the number of the first O-rings 1 is two, a tapered member 16 is disposed on a side wall of the valve shaft 2 above the first O-ring 1, an adjusting nut 13 is disposed on a side wall of the valve shaft 2 above the tapered member 16, a pre-tightening spring 14 is disposed between the tapered member 16 and the adjusting nut 13, washers 15 are disposed at both ends of the pre-tightening spring 14, the washer 15 below the pre-tightening spring 14 contacts with an upper end of the tapered member 16, the washer 15 above the pre-tightening spring 14 contacts with a lower end of the adjusting nut 13, a, fixedly connected with driving motor 5 on the valve body 4, the upper end of driving motor 5 extends and is provided with the motor shaft, and the motor shaft upwards runs through the inside that valve body 4 extends to valve body 4, the lateral wall of motor shaft and at the first gear 10 of the inside fixedly connected with of valve body 4, first gear 10 and the 12 intermeshing of second gear, the upper end of valve body 4 is provided with apron 9, apron 9 is run through to the upper end of valve shaft 2, the top of apron 9 and the top fixedly connected with sealing member 17 at valve shaft 2.
One side of the valve clack 3 is provided with a first inner hexagonal clamping groove 18, the first inner hexagonal clamping groove 18 is matched with a hexagonal clamping rod 19, the inner section outline of the valve body 4 is conical at the position of the conical part 16, the conical part 16 is in sliding connection with the valve shaft 2, the adjusting nut 13 is in threaded connection with the valve shaft 2, an adjusting sleeve 21 is arranged below the sealing part 17 and above the valve shaft 2, the adjusting sleeve 21 is in threaded connection with the cover plate 9, the upper end of the adjusting sleeve 21 is provided with a bayonet, a second sealing ring 22 is arranged between the sealing part 17 and the cover plate 9, a first sealing ring 8 is arranged between the cover plate 9 and the valve body 4, the first sealing ring 8 and the second sealing ring 22 are both made of rubber, a second O-shaped ring 11 is arranged between the motor shaft and the valve body 4, the number of the second O-shaped rings 11 is two, the first O-shaped ring 1 and the second O-shaped ring 11 are both, the edge of apron 9 is provided with fixing bolt 7, and fixing bolt 7 runs through apron 9, valve body 4, and fixing bolt 7's lateral wall and be provided with fixation nut 6 in the below of valve body 4, and the upper end of valve shaft 2 is provided with second hexagon socket head cap groove 20.
The working principle is as follows:
1. when the invention is assembled, the valve clack 3 is firstly placed below the valve body 4, then the valve shaft 2 is inserted from the upper part of the valve body 4, so that the hexagonal clamping rod 19 at the lower end of the valve shaft 2 is inserted into the first inner hexagonal clamping groove 18 on the valve clack 3, before the valve shaft 2 is placed, the adjusting nut 13 can be rotated in advance to control the pretightening force of the pretightening spring 14, so that the conical piece 16 is tightly contacted with the inner wall of the valve body 4 under the action of the pretightening spring 14, then the cover plate 9 is installed, after the whole assembly is finished, the sealing piece 17 can be rotated, the bayonet arranged at the upper end of the adjusting sleeve 21 is clamped by a tool, the adjusting sleeve 21 is rotated, the up-down position of the valve shaft 2 can be adjusted, thereby further increasing the pretightening force of the pretightening spring 14, improving the sealing performance between the conical piece 16 and the valve body 4, meanwhile, when the adjusting sleeve 21 is adjusted, the dislocation between the first gear 10 and the second gear 12 does not influence the meshing transmission of the first gear 10 and the second gear 12;
2. when the valve is used, the valve shaft 2 and the valve clack 3 can be driven to rotate by the driving motor 5 through the meshing of the first gear 10 and the second gear 12, so that the valve is opened and closed; when the driving motor 5 is damaged and the valve needs to be opened or closed, the sealing member 17 can be rotationally detached, a tool is inserted into a second inner hexagonal clamping groove 20 arranged at the upper end of the valve shaft 2, and the valve is rotated and opened and closed;
3. when the valve is in use and the sealing performance between the conical piece 16 and the valve body 4 is reduced, the adjusting sleeve 21 can be rotated to improve the sealing performance between the conical piece 16 and the valve body 4, and when the adjusting sleeve 21 is rotated to be useless or the adjusting distance influences the meshing transmission of the first gear 10 and the second gear 12, the cover plate 9 can be opened, and then the adjusting nut 13 can be rotated, so that the sealing performance between the conical piece 16 and the valve body 4 is improved, or the conical piece 16 can be replaced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a high temperature resistant self sealing butterfly valve, includes valve body (4), its characterized in that: the valve body (4) is internally provided with a valve clack (3), the upper end of the valve clack (3) is provided with a valve shaft (2), the lower end of the valve shaft (2) is fixedly connected with a hexagonal clamping rod (19), the lower end side wall of the valve shaft (2) is fixedly connected with a first O-shaped ring (1), the number of the first O-shaped rings (1) is two, the side wall of the valve shaft (2) is provided with a conical piece (16) above the first O-shaped ring (1), the side wall of the valve shaft (2) is provided with an adjusting nut (13) above the conical piece (16), a pre-tightening spring (14) is arranged between the conical piece (16) and the adjusting nut (13), both ends of the pre-tightening spring (14) are respectively provided with a gasket (15), the gasket (15) below the pre-tightening spring (14) is contacted with the upper end of the conical piece (16), and the gasket (15) above the pre-tightening spring (14) is contacted with the lower end, the utility model discloses a valve shaft, including valve shaft (2), valve body (4), the lateral wall of valve shaft (2) and in the top fixedly connected with second gear (12) of adjusting nut (13), fixedly connected with driving motor (5) on valve body (4), the upper end of driving motor (5) is extended and is provided with the motor shaft, and the motor shaft upwards runs through the inside that valve body (4) extended to valve body (4), the lateral wall of motor shaft and in the inside fixedly connected with first gear (10) of valve body (4), first gear (10) and second gear (12) intermeshing, the upper end of valve body (4) is provided with apron (9), apron (9) are run through to the upper end of valve shaft (2), the top of apron (9) and in the top fixedly connected with sealing member (17) of valve shaft (.
2. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: one side of the valve clack (3) is provided with a first inner hexagonal clamping groove (18), and the first inner hexagonal clamping groove (18) is matched with the hexagonal clamping rod (19).
3. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the valve body (4) has an internal cross-sectional profile and is tapered at a taper (16).
4. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the conical piece (16) is in sliding connection with the valve shaft (2), and the adjusting nut (13) is in threaded connection with the valve shaft (2).
5. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: an adjusting sleeve (21) is arranged below the sealing element (17) and above the valve shaft (2), the adjusting sleeve (21) is in threaded connection with the cover plate (9), and a bayonet is arranged at the upper end of the adjusting sleeve (21).
6. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: be provided with second sealing washer (22) between sealing member (17) and apron (9), be provided with first sealing washer (8) between apron (9) and valve body (4), first sealing washer (8) and second sealing washer (22) be the rubber material.
7. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: second O-shaped rings (11) are arranged between the motor shaft and the valve body (4), the number of the second O-shaped rings (11) is two, and the first O-shaped rings (1) and the second O-shaped rings (11) are made of rubber.
8. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the overlook of apron (9) is the calabash shape, the edge of apron (9) is provided with fixing bolt (7), fixing bolt (7) run through apron (9), valve body (4), the lateral wall of fixing bolt (7) and be provided with fixation nut (6) in the below of valve body (4).
9. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the upper end of the valve shaft (2) is provided with a second inner hexagonal clamping groove (20).
CN202010842254.3A 2020-08-20 2020-08-20 High-temperature-resistant automatic sealing butterfly valve Pending CN111795162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010842254.3A CN111795162A (en) 2020-08-20 2020-08-20 High-temperature-resistant automatic sealing butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010842254.3A CN111795162A (en) 2020-08-20 2020-08-20 High-temperature-resistant automatic sealing butterfly valve

Publications (1)

Publication Number Publication Date
CN111795162A true CN111795162A (en) 2020-10-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010842254.3A Pending CN111795162A (en) 2020-08-20 2020-08-20 High-temperature-resistant automatic sealing butterfly valve

Country Status (1)

Country Link
CN (1) CN111795162A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114382941A (en) * 2020-10-21 2022-04-22 浙江三花智能控制股份有限公司 Four-way valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2690611Y (en) * 2002-10-09 2005-04-06 爱三工业株式会社 Throttle control heat dissipation device
JP2010242972A (en) * 2010-06-15 2010-10-28 Denso Corp Valve open / close control device
CN206592638U (en) * 2017-03-30 2017-10-27 四川嘉星燃气设备制造有限公司 A kind of new butterfly valve
CN207598963U (en) * 2017-12-21 2018-07-10 天津必优机电设备技术有限公司 A kind of electric gas butterfly valve
CN209213066U (en) * 2018-12-28 2019-08-06 自贡自高阀门有限公司 A kind of Multifunction ball valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2690611Y (en) * 2002-10-09 2005-04-06 爱三工业株式会社 Throttle control heat dissipation device
JP2010242972A (en) * 2010-06-15 2010-10-28 Denso Corp Valve open / close control device
CN206592638U (en) * 2017-03-30 2017-10-27 四川嘉星燃气设备制造有限公司 A kind of new butterfly valve
CN207598963U (en) * 2017-12-21 2018-07-10 天津必优机电设备技术有限公司 A kind of electric gas butterfly valve
CN209213066U (en) * 2018-12-28 2019-08-06 自贡自高阀门有限公司 A kind of Multifunction ball valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114382941A (en) * 2020-10-21 2022-04-22 浙江三花智能控制股份有限公司 Four-way valve

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Application publication date: 20201020