CN113236806A - Valve with built-in safety mechanism - Google Patents
Valve with built-in safety mechanism Download PDFInfo
- Publication number
- CN113236806A CN113236806A CN202110547400.4A CN202110547400A CN113236806A CN 113236806 A CN113236806 A CN 113236806A CN 202110547400 A CN202110547400 A CN 202110547400A CN 113236806 A CN113236806 A CN 113236806A
- Authority
- CN
- China
- Prior art keywords
- valve
- lateral
- assembly
- safety mechanism
- valve plate
- 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
Links
Images
Classifications
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
-
- 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
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/316—Guiding of the slide
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to the technical field of valve seal forgings, in particular to a valve with a built-in safety mechanism. According to the valve with the built-in safety mechanism, the lateral assembly opening is formed in the outer wall, the lateral infusion tube is fixed inside the lateral assembly opening through the lateral sealing cover plate, the assembly and disassembly of the internal sealing mechanism are facilitated, and the later maintenance and replacement are facilitated; the top mounting seat and the elastic buffering mechanism are mounted on the valve plate, so that the valve plate is convenient to control, and can buffer the internal water pressure when the valve is cut off, eliminate the water hammer effect and improve the safety of the valve and the whole pipeline; the elastic buffering mechanism is installed by the aid of the middle installation opening in the valve plate, impact buffering can be performed on two sides simultaneously, the valve plate is applicable to different flow directions, and the application range is wider.
Description
Technical Field
The invention relates to the technical field of valve seal forgings, in particular to a valve with a built-in safety mechanism.
Background
Valves are plumbing accessories used to open and close a pipe, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow).
In fluid piping, valves are control elements that primarily function to isolate equipment and piping, regulate flow, prevent back flow, regulate and vent pressure. Can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metal, radioactive media and the like.
Up to now, the valve industry has been able to produce 12 kinds of gate valves, stop valves, throttle valves, plug valves, ball valves, electric valves, diaphragm valves, check valves, safety valves, pressure reducing valves, steam trap valves, emergency cut-off valves, etc., which are of complete kinds, and the suitable media are water, steam, oil, natural gas, etc. The valve bearing part is made of brass, cast iron, nodular cast iron, high-silicon cast iron, cast steel, forged steel, high/low alloy steel, stainless steel 304, stainless acid-resistant steel, duplex stainless steel, titanium alloy and the like, and can be used for producing various electric, pneumatic, manual and hydraulic valve driving devices.
In traditional valve processing production process, mainly adopt the integral type to forge forming process and make and form, the valve body that this kind of processing production mode was made is fixed knot structure, can't dismantle the valve body fast and maintain and change, in case the problem can only be the whole change, it is very high to maintain and the replacement cost, and application scope is limited.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the background technology, the improved valve with the built-in safety mechanism is provided, and the problems that the traditional valve is mainly manufactured by adopting an integrated forging and forming process, the valve body cannot be rapidly disassembled, maintained and replaced, and once a problem occurs, the valve body can only be integrally replaced, the maintenance and replacement cost is very high, and the application range is limited are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a valve with built-in safety mechanism, includes outside valve casing, side direction transfer line and valve plate, inside bottom runner chamber and the top control chamber of separating into through transverse partition board of outside valve casing, outside valve casing upper end outside bellied internal thread control pipe has, the inside screw thread of internal thread control pipe be equipped with vertical adjusting screw, valve plate upper end install the top mount pad that is used for the vertical adjusting screw of activity assembly, valve plate inside set up upper end open-ended first mid-mounting mouth and second mid-mounting mouth, top mount pad lower extreme fixed mounting have elastic buffer mechanism.
Valve plate upper surface a body structure assembly pole has, assembly pole top axial fixity have a body structure external screw thread check lock pole, the top mount pad include the sealed dish that is connected with valve plate upper end, fix at the movable assembly axle section of thick bamboo that sealed dish upper end central point put, vertical adjusting screw bottom axial fixity have with movable assembly axle section of thick bamboo matched with movable block, vertical adjusting screw insert movable assembly axle section of thick bamboo inside and top mount pad swing joint through the movable block.
The elastic buffer mechanism comprises a bottom piston cylinder fixedly installed at the lower end of the sealing disc, an inner piston inserted in the bottom piston cylinder and an extrusion spring installed on the upper end of the inner top surface and the inner piston of the bottom piston cylinder, and the lower end of the inner piston is provided with a bottom telescopic groove matched with the valve plate.
And a circular telescopic hole matched with the bottom piston cylinder is formed in the transverse partition plate.
The sealing disc is internally provided with a circular assembling through hole matched with the assembling rod, and the outer side of the external thread locking rod is in threaded sleeve connection with a fastening bolt used for fixing the sealing disc and the elastic buffer mechanism.
The lateral side of the external valve casing is provided with a lateral assembly port, and the connecting end of the lateral infusion tube is fixed with a lateral sealing cover plate matched with the lateral assembly port.
And an internal guide frame for improving the stability of the valve plate of the valve is fixedly arranged on the inner side surface of the bottom runner cavity.
And arc-shaped assembling surfaces matched with the bottom piston cylinder are arranged on the inner walls of two sides of the first middle mounting port and the second middle mounting port.
The inner side surface of the lateral assembling port and the outer side connecting surface of the lateral sealing cover plate are inclined surfaces.
The lateral side of the bottom piston cylinder is provided with a lateral exhaust port, an inner closed cover is assembled inside the lateral exhaust port in a sliding mode, and the inner closed cover is fixedly connected with the inner piston through an inner connecting rod.
The invention has the beneficial effects that:
(1) according to the valve with the built-in safety mechanism, the lateral assembly opening is formed in the outer wall, the lateral infusion tube is fixed inside the lateral assembly opening through the lateral sealing cover plate, the assembly and disassembly of the internal sealing mechanism are facilitated, and the later maintenance and replacement are facilitated;
(2) the top mounting seat and the elastic buffering mechanism are mounted on the valve plate, so that the valve plate is convenient to control, and can buffer the internal water pressure when the valve is cut off, eliminate the water hammer effect and improve the safety of the valve and the whole pipeline;
(3) the elastic buffer mechanism is installed by utilizing the middle installation opening in the valve plate, so that impact force buffering can be simultaneously performed on two sides, the valve plate is suitable for different flow directions, and the application range is wider;
(4) a lateral exhaust port with an internal closed cover is formed in the outer side surface of the bottom piston cylinder, the internal closed cover is linked with the internal piston, and the internal closed cover is automatically opened to exhaust air during buffering, so that the sealing performance in a normal state is improved;
(5) the valve plate and the top mounting seat are fixedly connected through the bolts, so that the valve plate is convenient to assemble, disassemble and replace, and the later-stage cost is reduced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an internal sectional view of the present invention.
FIG. 3 is a schematic view of the valve plate mounting end of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Fig. 1, fig. 2 and fig. 3 show a valve with built-in safety mechanism, including outside valve casing 1, side direction transfer line 2 and valve plate 3, outside valve casing 1 is inside to be separated into bottom runner chamber 5 and top control chamber 6 through transverse partition plate 4, outside valve casing 1 upper end has outside bellied internal thread control tube 7, internal thread control tube 7 internal thread is equipped with vertical adjusting screw 8, valve plate 3 upper end is installed and is used for the vertical adjusting screw 8's of activity assembly top mount pad 10, valve plate 3 is inside to be seted up upper end open-ended first mid-mounting mouth 11 and second mid-mounting mouth 12, top mount pad 10 lower extreme fixed mounting elasticity buffer gear.
Furthermore, in order to match with the movable assembly, the upper surface of the valve plate 3 is provided with an integral structure assembly rod 13, the top end of the assembly rod 13 is axially fixed with an integral structure external thread locking rod, the top mounting seat 10 comprises a sealing disc 14 connected with the upper end of the valve plate 3 and a movable assembly shaft barrel 15 fixed at the central position of the upper end of the sealing disc 14, the bottom end of the longitudinal adjusting screw rod 8 is axially fixed with a movable block 16 matched with the movable assembly shaft barrel 15, the longitudinal adjusting screw rod 8 is inserted into the movable assembly shaft barrel 15 through the movable block 16 and is movably connected with the top mounting seat 10, further, in order to cooperate with elastic telescopic buffering, the elastic buffering mechanism comprises a bottom piston cylinder 17 fixedly installed at the lower end of a sealing disc 14, an inner piston 18 inserted in the bottom piston cylinder 17 and an extrusion spring 19 installed on the inner top surface of the bottom piston cylinder 17 and the upper end of the inner piston 18, and a bottom telescopic groove matched with the valve plate 3 is formed in the lower end of the inner piston 18.
Further, for the cooperation is flexible and sealed, horizontal baffle 4 is inside to be seted up with bottom piston cylinder 17 matched with circular flexible hole 21, and further, for the cooperation nut is fixed, sealed dish 14 is inside to be seted up with assembly rod 13 matched with circular assembly through-hole, and external screw thread check lock lever outside screw thread has cup jointed the fastening bolt 22 that is used for fixed sealed dish 14 and elastic buffer mechanism.
Example (b): the sealing disk 14 is sleeved on the assembling rod 13 through a circular assembling through hole, and then is screwed on the external thread locking rod by using a fastening bolt 22 to be fixed at the upper end of the valve plate 3.
Furthermore, in order to be matched with the lateral installation and fixation, a lateral assembly opening 23 is formed in the outer side surface of the external valve casing 1, and a lateral sealing cover plate 24 matched with the lateral assembly opening 23 is fixed at the connecting end of the lateral infusion tube 2.
Example (b): an inner screw hole can be formed in the inner wall of the lateral assembling hole 23, and then the lateral sealing cover plate 24 is fixedly assembled by screwing a lateral bolt into the inner screw hole; or may be fixed by welding.
Further, for the stability of promotion lift adjustment, fixed mounting has the inside guide frame 25 that is used for poppet valve door plant 3 stability on the bottom runner chamber 5 medial surface, and further, for promoting the assembly laminating nature, all have on first mid-mounting mouth 11 and the second mid-mounting mouth 12 both sides inner wall with bottom piston cylinder 17 matched with arc assembly surface.
Further, in order to improve the assembly sealing performance and reduce the production cost, the connecting surface of the inner side surface of the lateral assembly port 23 and the outer side surface of the lateral sealing cover plate 24 is a slant surface.
Example (b): the lateral sealing cover plate 24 can be fixedly connected with the lateral assembling port 23 through welding, and the lateral sealing cover plate 24 can also be fixedly assembled through bolts.
Further, in order to match with linkage opening and closing, a lateral exhaust port 26 is formed in the outer side face of the bottom piston cylinder 17, an inner closed cover 27 is assembled inside the lateral exhaust port 26 in a sliding mode, and the inner closed cover 27 is fixedly connected with the inner piston 18 through an inner connecting rod 28.
According to the valve with the built-in safety mechanism, the lateral assembly opening 23 is formed in the outer wall, the lateral infusion tube 2 is fixed inside the lateral assembly opening 23 through the lateral sealing cover plate 24, the assembly and disassembly of the internal sealing mechanism are facilitated, and the later maintenance and replacement are facilitated; the top mounting seat 10 and the elastic buffer mechanism are mounted on the valve plate 3, so that the valve plate is convenient to control, and can buffer the internal water pressure when the valve is cut off, eliminate the water hammer effect and improve the safety of the valve and the whole pipeline; the elastic buffer mechanism is installed by utilizing the middle installation opening in the valve plate 3, so that impact force buffering can be simultaneously performed on two sides, the valve plate is suitable for different flow directions, and the application range is wider; a lateral exhaust port 26 with an internal closed cover 26 is formed in the outer side surface of the bottom piston cylinder 17, the internal closed cover 27 is linked with the internal piston 18, air is automatically exhausted and exhausted during buffering, and the sealing performance under a normal state is improved; valve plate 3 and top mount pad 10 pass through bolt fixed connection, make things convenient for the loading and unloading to change, later stage cost reduction.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a valve with built-in safety mechanism, includes outside valve casing (1), side direction transfer line (2) and valve plate (3), characterized by: outside valve casing (1) inside separate into bottom runner chamber (5) and top control chamber (6) through transverse partition (4), outside valve casing (1) upper end outside bellied internal thread control pipe (7) have, internal thread control pipe (7) internal thread be equipped with vertical adjusting screw (8), valve plate (3) upper end install top mount pad (10) that are used for the vertical adjusting screw (8) of activity assembly, valve plate (3) inside first mid-mounting mouth (11) and the second mid-mounting mouth (12) of upper end open-ended seted up, top mount pad (10) lower extreme fixed mounting have elastic buffer mechanism.
2. A valve with an internal safety mechanism as claimed in claim 1, wherein: valve plate (3) upper surface have a body structure assembly pole (13), assembly pole (13) top axial fixity have a body structure external screw thread check lock pole, top mount pad (10) including sealed dish (14) that are connected with valve plate (3) upper end, fix at sealed dish (14) upper end central point and put movable assembly axle section of thick bamboo (15), vertical adjusting screw bottom axial fixity have with movable assembly axle section of thick bamboo (15) matched with movable block (16), vertical adjusting screw insert movable assembly axle section of thick bamboo (15) inside and top mount pad (10) swing joint through movable block (16).
3. A valve with an internal safety mechanism as claimed in claim 2, wherein: the elastic buffer mechanism comprises a bottom piston cylinder (17) fixedly installed at the lower end of the sealing disc (14), an inner piston (18) inserted into the bottom piston cylinder (17) and an extrusion spring (19) installed at the upper end of the inner top surface of the bottom piston cylinder (17) and the upper end of the inner piston (18), and the lower end of the inner piston (18) is provided with a bottom telescopic groove matched with the valve plate (3).
4. A valve with an internal safety mechanism as claimed in claim 3, wherein: and a round telescopic hole (21) matched with the bottom piston cylinder (17) is formed in the transverse partition plate (4).
5. A valve with an internal safety mechanism as claimed in claim 2, wherein: seal dish (14) inside seted up with assembly rod (13) matched with circular assembly through-hole, external screw thread check lock lever outside screw thread cup joint and be used for fixing seal dish (14) and elastic buffer mechanism's fastening bolt (22).
6. A valve with an internal safety mechanism as claimed in claim 1, wherein: the lateral side of the external valve casing (1) is provided with a lateral assembly port (23), and the connecting end of the lateral infusion tube (2) is fixed with a lateral sealing cover plate (24) matched with the lateral assembly port (23).
7. A valve with an internal safety mechanism as claimed in claim 1, wherein: and an inner guide frame (25) for improving the stability of the valve plate (3) is fixedly arranged on the inner side surface of the bottom runner cavity (5).
8. A valve with an internal safety mechanism as claimed in claim 3, wherein: and arc-shaped assembling surfaces matched with the bottom piston cylinder (17) are arranged on the inner walls of the two sides of the first middle mounting port (11) and the second middle mounting port (12).
9. A valve with an internal safety mechanism as claimed in claim 6, wherein: the inner side surface of the lateral assembling port (23) and the outer side connecting surface of the lateral sealing cover plate (24) are inclined surfaces.
10. A valve with an internal safety mechanism as claimed in claim 1, wherein: lateral exhaust ports (26) are formed in the outer side face of the bottom piston cylinder (17), an inner closed cover (27) is assembled inside the lateral exhaust ports (26) in a sliding mode, and the inner closed cover (27) is fixedly connected with the inner piston (18) through an inner connecting rod (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110547400.4A CN113236806A (en) | 2021-05-19 | 2021-05-19 | Valve with built-in safety mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110547400.4A CN113236806A (en) | 2021-05-19 | 2021-05-19 | Valve with built-in safety mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113236806A true CN113236806A (en) | 2021-08-10 |
Family
ID=77137770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110547400.4A Pending CN113236806A (en) | 2021-05-19 | 2021-05-19 | Valve with built-in safety mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113236806A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089105U (en) * | 1991-05-16 | 1991-11-20 | 国营常熟制药机械厂 | Check valve |
| CN203162256U (en) * | 2013-03-22 | 2013-08-28 | 宁波埃美柯铜阀门有限公司 | Integrated type vertical type check valve |
| CN205534287U (en) * | 2016-01-25 | 2016-08-31 | 苏州巨瀚阀门有限公司 | Novel stop valve |
| CN208221849U (en) * | 2018-05-21 | 2018-12-11 | 盐城旭东机械有限公司 | A kind of easy-disassembling-assembling petroleum valve |
| CN109307088A (en) * | 2018-12-06 | 2019-02-05 | 安徽荣达阀门有限公司 | A kind of easily assembling mechanism for elastomeric check valve |
-
2021
- 2021-05-19 CN CN202110547400.4A patent/CN113236806A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089105U (en) * | 1991-05-16 | 1991-11-20 | 国营常熟制药机械厂 | Check valve |
| CN203162256U (en) * | 2013-03-22 | 2013-08-28 | 宁波埃美柯铜阀门有限公司 | Integrated type vertical type check valve |
| CN205534287U (en) * | 2016-01-25 | 2016-08-31 | 苏州巨瀚阀门有限公司 | Novel stop valve |
| CN208221849U (en) * | 2018-05-21 | 2018-12-11 | 盐城旭东机械有限公司 | A kind of easy-disassembling-assembling petroleum valve |
| CN109307088A (en) * | 2018-12-06 | 2019-02-05 | 安徽荣达阀门有限公司 | A kind of easily assembling mechanism for elastomeric check valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017157134A1 (en) | Flat-bottomed ball valve | |
| CN202834137U (en) | Underwater gate valve with hydraulic actuator | |
| CN107061834B (en) | Built-in driving axial-flow type regulating valve | |
| CA2869720C (en) | Guide member for use in a valve actuator assembly | |
| CN201599415U (en) | Positive-pressure internal balance stop valve | |
| US7537198B2 (en) | Direct double-acting in-line shut-off gate valve | |
| CN113236806A (en) | Valve with built-in safety mechanism | |
| CN210600196U (en) | High-pressure drilling throttle valve | |
| CN109578636A (en) | A kind of adjustable check valve | |
| CN113217703A (en) | Quick-release safety control mechanism for valve body | |
| CN215806396U (en) | High-pressure stop valve | |
| CN209557715U (en) | A kind of adjustable check valve | |
| CN113324079B (en) | Low-power consumption regulating valve with cut-off function | |
| CN203809784U (en) | Combined valve of novel structure | |
| CN107806522B (en) | Steam extraction type quick-closing check valve and working method thereof | |
| CN219975510U (en) | Double-piston balanced pressure release valve | |
| CN218377731U (en) | High-platform closed high-performance butterfly valve | |
| CN113187940B (en) | Split valve body with quick-release mechanism | |
| CN218440684U (en) | Split type easy-to-split butterfly valve | |
| CN216343971U (en) | Electric high-performance double-eccentric high-pressure butterfly valve | |
| CN201016329Y (en) | Adjustable combination valve hydraulic force balancing pump head | |
| CN116592164A (en) | Double-piston balanced pressure release valve | |
| CN220956861U (en) | Hard sealing butterfly valve | |
| CN220302874U (en) | Split type full-closed valve body gate valve | |
| CN218468278U (en) | High pressure resistant stop valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |