CN111486239A - Valve with two functions of stop valve and check valve - Google Patents

Valve with two functions of stop valve and check valve Download PDF

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Publication number
CN111486239A
CN111486239A CN202010320533.3A CN202010320533A CN111486239A CN 111486239 A CN111486239 A CN 111486239A CN 202010320533 A CN202010320533 A CN 202010320533A CN 111486239 A CN111486239 A CN 111486239A
Authority
CN
China
Prior art keywords
valve
clack
functions
rod
check
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.)
Withdrawn
Application number
CN202010320533.3A
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Chinese (zh)
Inventor
项光远
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.)
Wenzhou 100 Class Machinery Manufacturing Co ltd
Original Assignee
Wenzhou 100 Class Machinery Manufacturing 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 Wenzhou 100 Class Machinery Manufacturing Co ltd filed Critical Wenzhou 100 Class Machinery Manufacturing Co ltd
Priority to CN202010320533.3A priority Critical patent/CN111486239A/en
Publication of CN111486239A publication Critical patent/CN111486239A/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/02Lift 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 screw-spindle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/44Details of seats or valve members of double-seat valves
    • F16K1/443Details of seats or valve members of double-seat valves the seats being in series
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/46Attachment of sealing rings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/14Check valves with flexible valve members
    • F16K15/148Check valves with flexible valve members the closure elements being fixed in their centre
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/18Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/182Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
    • F16K15/1825Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with flexible valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209Check valves or pivoted valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/46Mechanical actuating means for remote operation
    • F16K31/465Mechanical actuating means for remote operation by flexible transmission means, e.g. cable, chain, bowden wire
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/50Mechanical actuating means with screw-spindle or internally threaded actuating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00Spindle sealings
    • F16K41/02Spindle sealings with stuffing-box ; Sealing rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

The invention relates to the technical field of valves and discloses a valve with two functions of a stop valve and a check valve, which comprises a valve body, wherein the upper end of the valve body is fixedly connected with a valve cover, the middle part of the valve cover is in threaded connection with a valve rod, the lower end of the valve rod is provided with an upper valve clack, the lower end of the upper valve clack is rotatably connected with a guide rod, the lower part of the guide rod is provided with a guide ball, the upper part of the guide rod is fixedly sleeved with an O-shaped ring, the upper part of the guide rod is movably sleeved with a lower valve clack, the right part of an inner cavity of the valve body. This have valve of two kinds of functions of stop valve and check valve concurrently, through valve clack and lower valve clack in setting up, the cooperation sets up upper seal, lower seal and multilayer O type circle, and the deuterogamy sets up the non return lamella with shell fragment fixed connection to reached the effect that has strengthened leakproofness, multi-functional use, has promoted the stability of non return.

Description

Valve with two functions of stop valve and check valve
Technical Field
The invention relates to the technical field of valves, in particular to a valve with two functions of a stop valve and a check valve.
Background
The stop valve is also called as a stop valve, belonging to a forced sealing type valve, so that when the valve is closed, pressure must be applied to the valve clack to force the sealing surface not to leak, and the check valve is a valve whose opening and closing member is a circular valve clack and can produce action by self weight and medium pressure to block medium backflow, and the two valves can be used in combination to play the role of safety isolation.
At present, most pump valves on the market, it is after using a period, inside valve clack and waterproof sealing pad are because wearing and tearing to only establish the individual layer sealed when ending the medium, finally then lead to the valve when closing, the leakproofness is relatively poor, influence subsequent production work, and this type of valve structure is comparatively single, can not realize the function of multiple type valve, so that functional singleness, when often the user uses, need cooperate the multiunit valve, neither convenient can cause extra cost again.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the valve with two functions of the stop valve and the check valve, which has the advantages of enhancing the sealing property, realizing multifunctional use and the like, and solves the problems of unstable closure sealing and single use function of the common valve.
(II) technical scheme
In order to achieve the purposes of enhancing the sealing performance, realizing multifunctional use and the like, the invention provides the following technical scheme: a valve with two functions of a stop valve and a check valve comprises a valve body, wherein the upper end of the valve body is fixedly connected with a valve cover, the upper part of an inner cavity of the valve cover is provided with filler, the middle part of the valve cover is in threaded connection with a valve rod, the lower end of the valve rod is provided with an upper valve clack, the lower part of the upper valve clack is fixedly sleeved with an upper seal, the lower end of the upper valve clack is rotatably connected with a guide rod, the lower part of the guide rod is provided with a guide ball, the upper part of the guide rod is fixedly sleeved with an O-shaped ring, the upper part of the guide rod is movably sleeved with a lower valve clack, the upper part of the lower valve clack is fixedly sleeved with a lower seal, the lower wall of the inner cavity of the valve body is fixedly provided with a U-shaped frame, the, the right part of the inner cavity of the valve body is provided with symmetrical elastic sheets, check valves are fixedly connected between the elastic sheets, and limiting strips are arranged on the right part of the inner cavity of the valve body and on the right side of the check valves.
Preferably, the right part of the inner cavity of the valve body is provided with a convex layer, and the check valve can be attached to the convex layer by matching with the elastic sheet under the impact of medium backflow so as to achieve the effect of sealing and preventing backflow.
Preferably, the arc wall that matches with the ball is all seted up to the left part and the right part of guide ball, and when the arc wall made things convenient for the ball activity, still can be restricted by the movable rod to avoid self to take place to rotate under the drive of last valve clack, thereby promoted the stability of stay cord during operation.
Preferably, the lower part of the lower valve clack is provided with symmetrical chutes, the upper end of the movable rod is clamped in the inner cavity of the chute, and the falling height of the lower valve clack can be adjusted when the end of the movable rod is positioned at different positions in the chute.
Preferably, the inner cavity of the U-shaped frame is provided with a U-shaped through hole, and the pull rope can be used for controlling the lower valve clack to be pulled to move downwards by penetrating the pull rope through the U-shaped through hole for limiting.
Preferably, the movable rod is connected with the U-shaped frame in a hinged mode, and the U-shaped frame provides a fixed rotation fulcrum for the movable rod.
(III) advantageous effects
Compared with the prior art, the invention provides a valve with two functions of a stop valve and a check valve, which has the following beneficial effects:
1. this have valve of two kinds of functions of stop valve and check valve concurrently, through last valve clack and lower valve clack double seal, the cooperation sets up sealed and lower seal, and the cooperation sets up multilayer O type circle again, makes the valve body after using for a long time, and the fluid medium in the inner chamber is by when ending, can't reveal easily to the effect of leakproofness has been strengthened.
2. This have valve of two kinds of functions of stop valve and check valve concurrently, set up the non return lamella through the inner chamber at the valve body, when the valve rod drives the valve lamella respectively and shifts up, the valve clack moves down, the medium passes through the inner chamber opening of valve body, strikes the non return lamella, and make the shell fragment take place deformation, the non return lamella removes and allows the medium to pass through, when the valve rod whereabouts makes the opening close, the medium backward flow of the inner chamber right part of valve body strikes the non return lamella, make its sealed passageway that moves to the left, prevent the backward flow, thereby the advantage of many function use has been reached.
3. This have valve of two kinds of functions of stop valve and check valve concurrently, through setting up spacing, when last valve clack and lower valve clack are opened and are released the medium, the non return lamella is strikeed to the medium, makes its move to the right, and the striking is on spacing to make the shell fragment can excessively take place deformation, thereby reached the effect that has promoted the stability of non return.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
fig. 4 is an enlarged view at C in fig. 2.
In the figure: 1-valve body, 2-valve cover, 3-filler, 4-valve rod, 5-upper valve clack, 6-upper seal, 7-guide rod, 8-guide ball, 9-O-shaped ring, 10-lower valve clack, 11-lower seal, 12-U-shaped frame, 13-movable rod, 14-ball, 15-pull rope, 16-elastic sheet, 17-check valve and 18-limit strip.
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.
Referring to fig. 1-4, a valve with two functions of a stop valve and a check valve comprises a valve body 1, wherein a notch capable of changing the open and close of a medium is arranged in the middle of an inner cavity of the valve body 1, a convex layer is arranged on the right part of the inner cavity of the valve body 1, a check flap 17 is arranged on the convex layer under the impact of medium backflow, a matching elastic sheet 16 can be attached to the convex layer to achieve the effect of sealing and preventing backflow, a valve cover 2 is fixedly connected to the upper end of the valve body 1, a filler 3 is arranged on the upper part of the inner cavity of the valve cover 2, a valve rod 4 is connected to the middle part of the valve cover 2 through a thread, an upper valve flap 5 is arranged on the lower end of the valve rod 4, an upper seal 6 is fixedly sleeved on the lower part of the upper valve flap 5, a guide rod 7 is rotatably connected to the lower end of the upper valve flap 5, a guide, the valve body can be limited by a movable rod 13 to avoid the rotation of the valve body under the driving of an upper valve clack 5, so that the working stability of a pull rope 15 is improved, an O-shaped ring 9 is fixedly sleeved on the upper part of a guide rod 7, a lower valve clack 10 is movably sleeved on the upper part of the guide rod 7, symmetrical sliding grooves are arranged on the lower part of the lower valve clack 10, the upper end of the movable rod 13 is clamped in an inner cavity of the sliding groove, when the end head of the movable rod 13 is positioned at different positions in the sliding groove, the falling height of the lower valve clack 10 can be adjusted, a lower seal 11 is fixedly sleeved on the upper part of the lower valve clack 10, a U-shaped frame 12 is fixedly arranged on the lower wall of the inner cavity of the valve body 1, a U-shaped through hole is formed in the inner cavity of the U-shaped frame 12, the pull rope 15 can control the lower valve clack 10 to be pulled to move downwards by penetrating through the U, the U-shaped frame 12 provides a fixed rotating pivot for the movable rod 13, the lower end of the movable rod 13 is provided with a ball 14, a pull rope 15 is arranged between the lower valve clack 10 and the lower end of the guide rod 7, the right part of the inner cavity of the valve body 1 is provided with a symmetrical elastic sheet 16, a check valve 17 is fixedly connected between the elastic sheets 16, and the right part of the inner cavity of the valve body 1 and the right side of the check valve 17 are provided with a limiting strip 18.
The working principle is as follows: the valve with the functions of the stop valve and the check valve is characterized in that an upper valve clack 5 is lifted by screwing a valve rod 4, the upper valve clack 5 synchronously pulls a pull rope 15 through a guide rod 7, so that a lower valve clack 10 descends along the guide rod 7, a gap is opened, a medium passes through the gap, a guide ball 8 moves upwards along with the guide rod 7 during the period, the upper end of a movable rod 13 slides towards two sides along the lower part of the lower valve clack 10 respectively, after the medium passes through the gap, a check valve 17 is impacted along an inner cavity pipeline of a valve body 1 to move rightwards and is impacted on a limit strip 18, an elastic sheet 16 cannot be excessively deformed by arranging the limit strip 18, when the upper valve clack 5 is driven by screwing the valve rod 4 to descend and seal the upper part of the gap, the upper valve clack 5 synchronously drives the guide ball 8 to fall through the guide rod 7, the guide ball 8 enables the lower end of the movable rod 13 to move towards two sides, and the upper end of the, the lower valve clack 10 moves upwards to seal from the lower part of the opening, the upper seal 6 and the lower seal 11 are arranged in a matching way through double sealing of the upper valve clack 5 and the lower valve clack 10, and the multiple layers of O-shaped rings 9 are arranged in a matching way, so that fluid media in the inner cavity cannot be easily leaked when the valve body 1 is stopped after being used for a long time, when the upper valve clack 5 and the lower valve clack 10 seal the opening, the media on the right part of the inner cavity of the valve body 1 can flow back instantly when the media are stopped, and the media impact the check clack 17 to move left to form a sealing channel to prevent backflow, thereby achieving the effects of enhancing the sealing property, realizing multifunctional use and improving the stability of the check.
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 (6)

1. The utility model provides a have valve of two kinds of functions of stop valve and check valve concurrently, includes valve body (1), its characterized in that: the upper end of the valve body (1) is fixedly connected with a valve cover (2), the upper part of an inner cavity of the valve cover (2) is provided with a filler (3), the middle part of the valve cover (2) is in threaded connection with a valve rod (4), the lower end of the valve rod (4) is provided with an upper valve clack (5), the lower part of the upper valve clack (5) is fixedly sleeved with an upper seal (6), the lower end of the upper valve clack (5) is rotatably connected with a guide rod (7), the lower part of the guide rod (7) is provided with a guide ball (8), the upper part of the guide rod (7) is fixedly sleeved with an O-shaped ring (9), the upper part of the guide rod (7) is movably sleeved with a lower valve clack (10), the upper part of the lower valve clack (10) is fixedly sleeved with a lower seal (11), the lower wall of the inner cavity of the valve body (1) is fixedly provided with a U-, the lower extreme of movable rod (13) is provided with ball (14), be provided with stay cord (15) between the lower extreme of lower valve clack (10) and guide arm (7), the inner chamber right part of valve body (1) is provided with shell fragment (16) of symmetry, fixedly connected with non return lamella (17) between shell fragment (16), the inner chamber right part of valve body (1) and the right side that is located non return lamella (17) are provided with spacing (18).
2. The valve of claim 1, wherein the valve has two functions of a stop valve and a check valve, and the valve further comprises: the right part of the inner cavity of the valve body (1) is provided with a convex layer.
3. The valve of claim 1, wherein the valve has two functions of a stop valve and a check valve, and the valve further comprises: the left part and the right part of the guide ball (8) are provided with arc-shaped grooves matched with the balls (14).
4. The valve of claim 1, wherein the valve has two functions of a stop valve and a check valve, and the valve further comprises: the lower part of the lower valve clack (10) is provided with symmetrical sliding grooves.
5. The valve of claim 1, wherein the valve has two functions of a stop valve and a check valve, and the valve further comprises: and a U-shaped through hole is formed in the inner cavity of the U-shaped frame (12).
6. The valve of claim 1, wherein the valve has two functions of a stop valve and a check valve, and the valve further comprises: the movable rod (13) is connected with the U-shaped frame (12) in a hinged mode.
CN202010320533.3A 2020-04-22 2020-04-22 Valve with two functions of stop valve and check valve Withdrawn CN111486239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010320533.3A CN111486239A (en) 2020-04-22 2020-04-22 Valve with two functions of stop valve and check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010320533.3A CN111486239A (en) 2020-04-22 2020-04-22 Valve with two functions of stop valve and check valve

Publications (1)

Publication Number Publication Date
CN111486239A true CN111486239A (en) 2020-08-04

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Application Number Title Priority Date Filing Date
CN202010320533.3A Withdrawn CN111486239A (en) 2020-04-22 2020-04-22 Valve with two functions of stop valve and check valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113669487A (en) * 2021-08-04 2021-11-19 凯瑞特阀业有限公司 Integral forged stop and check dual-purpose valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645562A1 (en) * 1993-09-25 1995-03-29 Karl Dungs GmbH & Co. Double seat valve
CN202561136U (en) * 2012-04-23 2012-11-28 温州永德信流体设备有限公司 Double-seat mixing prevention valve
CN102966745A (en) * 2012-12-06 2013-03-13 张家政 Sealing valve with double valve plates
CN204573216U (en) * 2015-03-10 2015-08-19 浙江富羽阀门制造有限公司 Self-stabilizing safety valve
CN105972274A (en) * 2016-08-03 2016-09-28 氟络塞尔特种阀门(苏州)有限公司 Lift check valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645562A1 (en) * 1993-09-25 1995-03-29 Karl Dungs GmbH & Co. Double seat valve
CN202561136U (en) * 2012-04-23 2012-11-28 温州永德信流体设备有限公司 Double-seat mixing prevention valve
CN102966745A (en) * 2012-12-06 2013-03-13 张家政 Sealing valve with double valve plates
CN204573216U (en) * 2015-03-10 2015-08-19 浙江富羽阀门制造有限公司 Self-stabilizing safety valve
CN105972274A (en) * 2016-08-03 2016-09-28 氟络塞尔特种阀门(苏州)有限公司 Lift check valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113669487A (en) * 2021-08-04 2021-11-19 凯瑞特阀业有限公司 Integral forged stop and check dual-purpose valve
CN113669487B (en) * 2021-08-04 2024-03-01 凯瑞特阀业集团有限公司 Integral forging stop and check dual-purpose valve

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Application publication date: 20200804