CN109357027A - A kind of combined type shut-off valve - Google Patents
A kind of combined type shut-off valve Download PDFInfo
- Publication number
- CN109357027A CN109357027A CN201811363394.1A CN201811363394A CN109357027A CN 109357027 A CN109357027 A CN 109357027A CN 201811363394 A CN201811363394 A CN 201811363394A CN 109357027 A CN109357027 A CN 109357027A
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- China
- Prior art keywords
- hole
- pressure release
- valve body
- column
- sealing
- 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
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- 239000012530 fluid Substances 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims description 54
- 238000007789 sealing Methods 0.000 claims description 50
- 238000009434 installation Methods 0.000 claims description 23
- 230000000903 blocking effect Effects 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 230000037361 pathway Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- 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
- F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
-
- 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
Abstract
The invention discloses a kind of combined type shut-off valves, including valve body, pressure cap and pressure release screw, the upper end of the valve body is provided with mounting hole, for installing the pressure cap, the lateral side of the valve body is provided with inlet opening, the transverse side of the valve body opposite with the inlet opening is provided with side fluid hole, and the valve body bottom end is provided with bottom fluid hole；Cut-off component is installed, the pressure release screw includes screwing end, and the upper end for screwing end is provided with connecting stud, and the connecting stud upper end is provided with closure column, and the pressure release screw is internally provided with the pressure release passage for pressure release inside the pressure cap.Beneficial effect is: the unlatching and closure of side fluid hole and bottom fluid hole realized by pressure release screw, be can be realized the conversion between device through type and right-angle type, be can satisfy different use demands, it is applied widely；Pressure release screw is screwed, pressure release effect can be played by pressure release passage, apparatus function is various, and using effect is good.
Description
Technical field
The present invention relates to shut-off valve technical fields, and in particular to a kind of combined type shut-off valve.
Background technique
Shut-off valve is also pipe valve, is a kind of one of most popular valve, and why very popular it is, is due to opening
Frictional force is small between sealing surface during closing, relatively durable, and Lift is little, and manufacture is easy, easy to maintenance, is applicable not only to
Mesolow, and it is suitable for high pressure.Right-angle type shut-off valve and straight-through stop valve are common two kinds of shut-off valve, according to specific pipe
Road distribution and demand are applied to different occasions, if Fig. 7 is right-angle type shut-off valve internal structure main view, if Fig. 8 is that through type is cut
Only valve internal structure main view, current shut-off valve cannot achieve the conversion between right-angle type and through type, is unable to satisfy difference
Use demand, the scope of application is limited；Do not have decompression function simultaneously, using effect is undesirable.
Summary of the invention
The object of the invention is that a kind of combined type shut-off valve is provided to solve the above-mentioned problems, to solve existing skill
Current shut-off valve cannot achieve the conversion between right-angle type and through type in art, be unable to satisfy different use demands, be applicable in
Range is limited；Do not have a decompression function simultaneously, the technical problems such as using effect is undesirable.Many technical solutions provided by the invention
In preferred technical solution the unlatching and closure of side fluid hole and bottom fluid hole are realized by pressure release screw, can be realized dress
The conversion between through type and right-angle type is set, can satisfy different use demands, it is applied widely；Pressure release screw is screwed, is led to
Pressure release effect, the technical effects such as apparatus function is various, and using effect is good, elaboration as detailed below can be played by crossing pressure release passage.
To achieve the above object, the present invention provides following technical schemes:
A kind of combined type shut-off valve provided by the invention, including valve body, pressure cap and pressure release screw, the upper end of the valve body are set
It is equipped with mounting hole, the inner wall of the hole installing is provided with internal screw thread, for installing the pressure cap, the lateral side setting of the valve body
There is inlet opening, the inlet opening inner wall is provided with internal screw thread, for realizing the connection of valve body and inlet pipe, with the inlet opening
The transverse side of the opposite valve body is provided with side fluid hole, and the side fluid hole inner wall is provided with internal screw thread, is used for
Realize the connection of valve body and outlet tube road, the valve body bottom end is provided with bottom fluid hole, and the inner wall of the bottom fluid hole is set
It is equipped with internal screw thread, for realizing the connection of valve body and outlet tube road；The feed liquor of the liquid outlet of the inlet opening and the mounting hole
It is communicated with feed pathway between mouthful, the liquid outlet of the mounting hole is provided with liquid outlet channel, and the liquid outlet channel is at T-shaped knot
Structure, the other two port of the liquid outlet channel are connected with the side fluid hole and the bottom fluid hole respectively；
The Basolateral of the pressure cap is provided with installation screw thread, for the pressure cap to be mounted on inside the mounting hole,
Threaded hole and seal chamber are disposed under upper inside the pressure cap；Cut-off component is installed inside the pressure cap, it is described
Ending component includes installation stud, and the installation stud is for cooperating the threaded hole that the cut-off component is mounted on the pressure
Inside cap, the installation stud bottom end is provided with sealing column, for cooperating the seal chamber to be sealed, the bottom of the sealing column
End is equipped with taper cut-off column, for realizing the unlatching and blocking between the mounting hole and the liquid outlet channel；
The pressure release screw includes screwing end, and the upper end for screwing end is provided with connecting stud, is used for the pressure release
Screw is mounted on inside the side fluid hole or the bottom fluid hole, and the connecting stud upper end is provided with closure column,
For realizing between the liquid outlet channel and the bottom fluid hole and between the liquid outlet channel and the side fluid hole
Unlatching and blocking, the pressure release screw is internally provided with the pressure release passage for pressure release, the both ends difference of the pressure release passage
Through the bottom end for screwing end and the outside for blocking column.
Using a kind of above-mentioned combined type shut-off valve, when use device, screw it is described screw end, pass through connecting stud general
The pressure release screw is mounted on inside the bottom fluid hole, realizes the liquid outlet channel and the bottom by the closure column
Closure between fluid hole, the at this time inlet opening, the feed pathway, the mounting hole, the liquid outlet channel and the side
Face fluid hole constitutes access, screws the installation screw thread, drives the taper to end column lifting by the sealing column, realizes institute
Unlatching and cut-off of the taper cut-off column to the input end of the liquid outlet channel are stated, device is in the shape of straight-through stop valve at this time
State；End is screwed described in screwing, the pressure release screw is mounted on inside the side fluid hole by the connecting stud, is passed through
The closure column realizes the closure between the liquid outlet channel and the side fluid hole, at this time the inlet opening, the feed liquor
Channel, the mounting hole, the liquid outlet channel and the bottom fluid hole constitute access, screw the installation screw thread, pass through institute
It states sealing column and drives the taper cut-off column lifting, realize unlatching of the taper cut-off column to the input end of the liquid outlet channel
And cut-off, device is in the state of right-angle type shut-off valve at this time；Realized by the pressure release screw to the side fluid hole and
It carries out blocking or blocking between the bottom fluid hole and the liquid outlet channel, Neng Goushi between the liquid outlet channel
Conversion between existing device right-angle type and through type, can satisfy different use demands, expansion instrument it is applied widely；Dress
It sets in use process, screws the pressure release screw, release the sealing for blocking column to the outlet end of the liquid outlet channel, make institute
It states liquid outlet channel to be in communication with the outside by the pressure release passage, plays the role of pressure release.
Preferably, the valve body upper surface is provided with sealing counterbore, it is provided with annular groove on the outside of the pressure cap, it is described
Annular groove is located above the installation screw thread, and copper gasket is equipped with inside the annular groove, and the copper gasket is located at described
It seals inside counterbore, and the copper gasket and the sealing counterbore clearance fit.
Preferably, the installation stud upper end is equipped with handle.
Preferably, the outer diameter of the sealing column is equal with the internal diameter of the seal chamber, and matched using gap
It closes.
Preferably, being provided with seal groove on the outside of the sealing column, sealing ring is installed inside the seal groove.
Preferably, the seal groove is at least provided with two.
Preferably, the junction of the mounting hole and the liquid outlet channel is provided with sealing taper hole, the sealing taper hole
It is corresponding with taper cut-off column, and the taper of the sealing taper hole is equal with the taper cut-off taper of column.
Preferably, the end for blocking column uses pyramidal structure.
Beneficial effect is: 1, the unlatching and closure of side fluid hole and bottom fluid hole, energy are realized by pressure release screw
Conversion between enough realization device through types and right-angle type, can satisfy different use demands, applied widely；
2, pressure release screw is screwed, pressure release effect can be played by pressure release passage, apparatus function is various, and using effect is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is pass-through state internal structure main view of the invention；
Fig. 2 is right angle condition internal structure main view of the invention；
Fig. 3 is valve body structure main view of the invention；
Fig. 4 is pressure cap structural front view of the invention；
Fig. 5 is cut-off modular construction main view of the invention；
Fig. 6 is pressure release bolt structure main view of the invention；
Fig. 7 is right-angle type shut-off valve internal structure main view of the invention；
Fig. 8 is straight-through stop valve internal structure main view of the invention.
The reference numerals are as follows:
1, valve body；101, mounting hole；102, feed pathway；103, inlet opening；104, liquid outlet channel；105, bottom goes out liquid
Hole；106, side fluid hole；107, taper hole is sealed；108, counterbore is sealed；2, pressure cap；201, screw thread is installed；202, annular groove；
203, threaded hole；204, seal chamber；3, end component；301, handle；302, stud is installed；303, sealing column；304, seal groove；
305, taper ends column；306, sealing ring；4, copper gasket；5, pressure release screw；501, end is screwed；502, connecting stud；503, it seals
Stifled column；504, pressure release passage.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Referring to shown in Fig. 1-Fig. 6, the present invention provides a kind of combined type shut-off valves, including valve body 1, pressure cap 2 and pressure release spiral shell
Nail 5, the upper end of valve body 1 is provided with mounting hole 101, and 101 inner wall of mounting hole is provided with internal screw thread, for installing pressure cap 2, valve body 1
Lateral side be provided with inlet opening 103,103 inner wall of inlet opening is provided with internal screw thread, for realizing valve body 1 and inlet pipe
Connection, the transverse side of the valve body 1 opposite with inlet opening 103 are provided with side fluid hole 106, and fluid hole 106 inner wall in side is set
It is equipped with internal screw thread, for realizing the connection of valve body 1 and outlet tube road, 1 bottom end of valve body is provided with bottom fluid hole 105, and bottom goes out
The inner wall of fluid apertures 105 is provided with internal screw thread, for realizing the connection of valve body 1 and outlet tube road；The liquid outlet and peace of inlet opening 103
It fills and is communicated with feed pathway 102 between the inlet in hole 101, the liquid outlet of mounting hole 101 is provided with liquid outlet channel 104, out liquid
Channel 104 at T-shaped structure, the other two port of liquid outlet channel 104 respectively with side fluid hole 106 and bottom fluid hole
105 are connected；
The Basolateral of pressure cap 2 is provided with installation screw thread 201, for pressure cap 2 to be mounted on inside mounting hole 101, pressure cap 2
Inside is disposed with threaded hole 203 and seal chamber 204 under upper；Cut-off component 3 is installed inside pressure cap 2, ends component 3
Including installing stud 302, installation stud 302 is mounted on inside pressure cap 2 for mate with threaded holes 203 by component 3 is ended, and installs spiral shell
302 bottom end of column is provided with sealing column 303, and for cooperating seal chamber 204 to be sealed, the bottom end of sealing column 303 is equipped with taper
End column 305, for realizing the unlatching and blocking between mounting hole 101 and liquid outlet channel 104；
Pressure release screw 5 includes screwing end 501, and the upper end for screwing end 501 is provided with connecting stud 502, is used for pressure release spiral shell
Nail 5 is mounted on inside side fluid hole 106 or bottom fluid hole 105, and 502 upper end of connecting stud, which is provided with, blocks column 503, is used
Unlatching between realization liquid outlet channel 104 and bottom fluid hole 105 and between liquid outlet channel 104 and side fluid hole 106
And blocking, pressure release screw 5 are internally provided with the pressure release passage 504 for pressure release, the both ends of pressure release passage 504, which extend through, to screw
The bottom end at end 501 and the outside for blocking column 503.
As optional embodiment, 1 upper surface of valve body is provided with sealing counterbore 108, and it is recessed to be provided with annular on the outside of pressure cap 2
Slot 202, annular groove 202 are located at 201 top of installation screw thread, are equipped with copper gasket 4 inside annular groove 202, copper gasket 4 is located at
It seals inside counterbore 108, and copper gasket 4 and sealing 108 clearance fit of counterbore, in this way setting can be improved pressure cap 2 and mounting hole
Sealing effect between 101 prevents from revealing；
Installation 302 upper end of stud is equipped with handle 301, and setting in this way drives installation stud 302 to revolve convenient for passing through handle 301
Turn, auxiliary realizes unlatching and cut-off of the taper cut-off column 305 to the import of liquid outlet channel 104；
The outer diameter of sealing column 303 is equal with the internal diameter of seal chamber 204, and is gap-matched, and is arranged in this way
It can guarantee that sealing column 303 comes into full contact with seal chamber 204, guarantee the sealing effect between cut-off component 3 and pressure cap 2, prevent
Leakage；
It is provided with seal groove 304 on the outside of sealing column 303, sealing ring 306 is installed inside seal groove 304, utilizes sealing ring
306 elasticity contacts sealing ring 306 with seal chamber 204 always, when helping to ensure that sealing column 303 is gone up and down, sealing column 303
With the sealing effect between seal chamber 204；
Seal groove 304 is at least provided with two, and setting helps to improve between sealing column 303 and seal chamber 204 in this way
Sealing effect；
The junction of mounting hole 101 and liquid outlet channel 104 is provided with sealing taper hole 107, and sealing taper hole 107 and taper are ended
Column 305 is corresponding, and the taper for sealing taper hole 107 is equal with the taper cut-off taper of column 305, and setting in this way can be such that taper cuts
Only column 305 comes into full contact with sealing taper hole 107, guarantees taper cut-off column 305 to the cut-off effect of 104 import of liquid outlet channel；
The end for blocking column 503 uses pyramidal structure, and setting in this way can guarantee that blocking column 503 goes out liquid outlet channel 104
The plugging effect of mouth.
Using the above structure, when use device, end 501 is screwed, pressure release screw 5 is installed by connecting stud 502
Inside bottom fluid hole 105, by blocking the closure between the realization liquid outlet channel 104 of column 503 and bottom fluid hole 105, this
When inlet opening 103, feed pathway 102, mounting hole 101, liquid outlet channel 104 and side fluid hole 106 constitute access, screw installation
Screw thread 201 drives taper to end column 305 and goes up and down by sealing column 303, realize taper cut-off column 305 to liquid outlet channel 104 into
The unlatching and cut-off at mouth end, device is in the state of straight-through stop valve at this time；End 501 is screwed, connecting stud 502 is passed through
Pressure release screw 5 is mounted on inside side fluid hole 106, realizes liquid outlet channel 104 and side fluid hole by blocking column 503
Closure between 106, at this time inlet opening 103, feed pathway 102, mounting hole 101, liquid outlet channel 104 and bottom fluid hole 105
Access is constituted, installation screw thread 201 is screwed, drives taper to end column 305 by sealing column 303 and goes up and down, realize that taper ends column 305
Unlatching and cut-off to the input end of liquid outlet channel 104, device is in the state of right-angle type shut-off valve at this time；Pass through pressure release screw
5 realize to carried out between side fluid hole 106 and liquid outlet channel 104 block or to bottom fluid hole 105 and liquid outlet channel 104
Between blocked, can be realized the conversion between device right-angle type and through type, can satisfy different use demands, expand
Device it is applied widely；In device use process, pressure release screw 5 is screwed, releases and blocks the going out to liquid outlet channel 104 of column 503
The sealing at mouth end, makes liquid outlet channel 104 be in communication with the outside by pressure release passage 504, plays the role of pressure release.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
1. a kind of combined type shut-off valve, including valve body (1), pressure cap (2) and pressure release screw (5), it is characterised in that: the valve body
(1) upper end is provided with mounting hole (101), and mounting hole (101) inner wall is provided with internal screw thread, for installing the pressure cap
(2), the lateral side of the valve body (1) is provided with inlet opening (103), and inlet opening (103) inner wall is provided with internal screw thread, is used
In the connection for realizing valve body (1) and inlet pipe, the transverse side of the valve body (1) opposite with the inlet opening (103) is set
It is equipped with side fluid hole (106), side fluid hole (106) inner wall is provided with internal screw thread, for realizing valve body (1) and liquid out
The connection of pipeline, valve body (1) bottom end are provided with bottom fluid hole (105), the inner wall setting of the bottom fluid hole (105)
There is internal screw thread, for realizing the connection of valve body (1) and outlet tube road；The liquid outlet and the mounting hole of the inlet opening (103)
(101) it is communicated between inlet feed pathway (102), the liquid outlet of the mounting hole (101) is provided with liquid outlet channel
(104), the liquid outlet channel (104) is at T-shaped structure, the other two port of the liquid outlet channel (104) respectively with institute
Side fluid hole (106) is stated to be connected with the bottom fluid hole (105)；
The Basolateral of the pressure cap (2) is provided with installation screw thread (201), for the pressure cap (2) to be mounted on the installation
Hole (101) is internal, and the pressure cap (2) is internal to be disposed with threaded hole (203) and seal chamber (204) under upper；The pressure
Cut-off component (3) is installed, the cut-off component (3) includes installation stud (302), the installation stud (302) inside cap (2)
For cooperating the threaded hole (203) that the cut-off component (3) is mounted on the pressure cap (2) inside, the installation stud
(302) bottom end is provided with sealing column (303), for cooperating the seal chamber (204) to be sealed, the sealing column (303)
Bottom end is equipped with taper cut-off column (305), for realizing opening between the mounting hole (101) and the liquid outlet channel (104)
It opens and blocks；
The pressure release screw (5) includes screwing end (501), and the upper end for screwing end (501) is provided with connecting stud (502),
For the pressure release screw (5) to be mounted on the side fluid hole (106) or the bottom fluid hole (105) inside, institute
It states connecting stud (502) upper end and is provided with closure column (503), go out liquid for realizing the liquid outlet channel (104) and the bottom
Unlatching and blocking between hole (105) and between the liquid outlet channel (104) and the side fluid hole (106), it is described to let out
Pressure screw (5) is internally provided with the pressure release passage (504) for pressure release, and the both ends of the pressure release passage (504) extend through institute
State the bottom end for screwing end (501) and the outside for blocking column (503).
2. a kind of combined type shut-off valve according to claim 1, it is characterised in that: valve body (1) upper surface is provided with close
It seals counterbore (108), is provided with annular groove (202) on the outside of the pressure cap (2), the annular groove (202) is located at the installation
Above screw thread (201), it is equipped with copper gasket (4) inside the annular groove (202), the copper gasket (4) is located at the sealing
Counterbore (108) is internal, and the copper gasket (4) and sealing counterbore (108) clearance fit.
3. a kind of combined type shut-off valve according to claim 1, it is characterised in that: the installation of the installation stud (302) upper end
There are handle (301).
4. a kind of combined type shut-off valve according to claim 1, it is characterised in that: the outer diameter of the sealing column (303)
It is equal with the internal diameter of the seal chamber (204), and be gap-matched.
5. a kind of combined type shut-off valve according to claim 4, it is characterised in that: be provided on the outside of the sealing column (303)
Seal groove (304), the seal groove (304) is internal to be equipped with sealing ring (306).
6. a kind of combined type shut-off valve according to claim 5, it is characterised in that: the seal groove (304) at least provided with
Two.
7. a kind of combined type shut-off valve according to claim 1, it is characterised in that: the mounting hole (101) and the liquid out
The junction in channel (104) is provided with sealing taper hole (107), and the sealing taper hole (107) ends column (305) phase with the taper
It is corresponding, and the taper of sealing taper hole (107) is equal with the taper cut-off taper of column (305).
8. a kind of combined type shut-off valve according to claim 1, it is characterised in that: the end for blocking column (503) uses
Pyramidal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363394.1A CN109357027A (en) | 2018-11-16 | 2018-11-16 | A kind of combined type shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363394.1A CN109357027A (en) | 2018-11-16 | 2018-11-16 | A kind of combined type shut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109357027A true CN109357027A (en) | 2019-02-19 |
Family
ID=65345325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811363394.1A Pending CN109357027A (en) | 2018-11-16 | 2018-11-16 | A kind of combined type shut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109357027A (en) |
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| CN106917911A (en) * | 2017-03-11 | 2017-07-04 | 扬州润盈机械有限公司 | A kind of stop valve of sealing structure of rock |
| CN206600518U (en) * | 2017-03-11 | 2017-10-31 | 扬州润盈机械有限公司 | A kind of stop valve of sealing structure of rock |
| CN208871042U (en) * | 2018-10-12 | 2019-05-17 | 四川中油乐仪能源装备制造股份有限公司 | A kind of needle-like shut-off valve |
| CN209245296U (en) * | 2018-11-16 | 2019-08-13 | 重庆宗星机械有限责任公司 | A kind of combined type shut-off valve |
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