CN115217810A - Reversely-opened plug-in type stop valve and method - Google Patents
Reversely-opened plug-in type stop valve and method Download PDFInfo
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- CN115217810A CN115217810A CN202210783408.5A CN202210783408A CN115217810A CN 115217810 A CN115217810 A CN 115217810A CN 202210783408 A CN202210783408 A CN 202210783408A CN 115217810 A CN115217810 A CN 115217810A
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- valve
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- liquid inlet
- liquid
- positioning sleeve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Abstract
The invention belongs to the technical field of valves, and particularly relates to a reversely-opened plug-in type stop valve and a method thereof.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a reversely-opened plug-in type stop valve and a method.
Background
The stop valve is a common hydraulic element and widely used in various hydraulic systems, and belongs to a forced sealing type valve, so when the valve is closed, pressure must be applied to a starting and closing part in the valve to prevent a sealing surface from leaking, for example, a starting and closing part of the stop valve is a cylindrical valve flap, a valve rod torsion force is utilized to apply downward pressure to the sealing surface, so that the sealing surface of the valve flap is tightly attached to the sealing surface of a valve seat, and the stop valve can prevent the inflow of a medium or be used for adjusting the flow rate of the medium.
At present, in a pipeline of a high-pressure hydraulic system, because the fluid pressure in the pipeline is large, when a valve rod is rotated, the valve rod can move downwards only by overcoming the acting force exerted on a valve clack by the fluid pressure, the diameter of a hand wheel is generally large so as to reduce the acting force for screwing the hand wheel, but on some equipment with high integration degree of hydraulic elements and small operating position space, the hand wheel with the large diameter cannot be used, and at the moment, the stop valve is closed by rotating the valve rod, and great effort is required.
Disclosure of Invention
The invention aims to provide a plug-in type stop valve capable of being opened reversely and a method thereof, and solves the technical problems that in the prior art, under the condition of overlarge pressure in a hydraulic system, the existing valve needs to apply larger torsion force when being closed, so that the diameter of a valve hand wheel is too large, a larger valve installation space is needed, and the valve hand wheel is inconvenient to use in the hydraulic system with high integration level of hydraulic elements.
In order to solve the above technical problems, a first aspect of the present invention is:
there is provided a reverse opening cartridge stop valve comprising:
the valve block is provided with a valve core installation cavity, a liquid inlet pore channel and a liquid outlet pore channel which are communicated with the valve core installation cavity;
the valve core comprises an opening and closing assembly, the opening and closing assembly comprises a valve sleeve, a liquid inlet hole and a liquid outlet hole which are communicated are formed in the valve sleeve, a sealing part and an elastic part are arranged in the valve sleeve, and the sealing part blocks the liquid inlet hole under the action of the elastic part; an actuating mechanism is arranged beside the opening and closing assembly and comprises a valve rod and a positioning sleeve, the valve rod is arranged in the positioning sleeve, and a liquid flow passage is arranged between the valve sleeve and the positioning sleeve, so that liquid can reach the liquid inlet hole through the liquid flow passage; the valve core further comprises a screw and a valve cover, a screw hole corresponding to the screw is formed in the valve cover, and the front end of the screw is connected to the rear end of the valve rod;
the valve core is arranged in the valve core mounting cavity of the valve block, the valve cover is connected to the valve block, the liquid flow channel and the liquid outlet hole are respectively communicated with the liquid inlet pore channel and the liquid outlet pore channel, and when the valve rod moves forwards along the positioning sleeve, the front end of the valve rod can push the sealing part, so that the liquid inlet hole is opened.
Preferably, a plurality of first supporting block parts are arranged on the front end face of the positioning sleeve at intervals along the circumferential direction, a plurality of second supporting block parts are arranged on the periphery of the rear end of the valve sleeve at intervals, and the front end face of each first supporting block part is supported on the top face of each second supporting block part, so that the front end of the positioning sleeve and the rear end of the valve sleeve form the liquid flow channel.
Preferably, the rear end of the valve rod is provided with a T-shaped hole, the front end of the screw is provided with a T-shaped block, and the T-shaped block is clamped in the T-shaped hole.
Preferably, the elastic component is a spring, a spring limiting seat is installed on the liquid outlet hole, the spring is located in a pore channel between the liquid inlet hole and the liquid outlet hole, and the bottom of the spring is supported on the spring limiting seat.
Preferably, the top of the spring is provided with a support sleeve, the peripheral surface of the support sleeve is matched with the inner wall surface of the pore channel, and the support sleeve is provided with a notch for passing through fluid along the circumferential direction.
Preferably, the sealing component is a steel ball; and a hand wheel is arranged at the rear end of the screw rod.
Preferably, a first sealing ring is arranged between the valve rod and the positioning sleeve; the front end of the valve sleeve is provided with a second sealing ring; and a third sealing ring is arranged outside the positioning sleeve.
Preferably, the matching threads of the screw and the valve cover are in a left-handed thread structure.
The second aspect of the present invention is:
a method of reverse opening a valve is provided:
the valve comprises a valve block and a valve core, wherein the valve block is provided with a valve core installation cavity, and a liquid inlet pore channel and a liquid outlet pore channel which are communicated with the valve core installation cavity;
the valve core comprises an opening and closing assembly, the opening and closing assembly comprises a valve sleeve, a liquid inlet hole and a liquid outlet hole which are communicated with each other are formed in the valve sleeve, a sealing part and an elastic part are arranged in the valve sleeve, and the sealing part blocks the liquid inlet hole under the action of the elastic part; an actuating mechanism is arranged beside the opening and closing assembly and comprises a valve rod and a positioning sleeve, the valve rod is arranged in the positioning sleeve, and a liquid flow passage is arranged between the valve sleeve and the positioning sleeve, so that liquid can reach the liquid inlet hole through the liquid flow passage; the valve core further comprises a screw and a valve cover, a screw hole corresponding to the screw is formed in the valve cover, and the front end of the screw is connected to the rear end of the valve rod; the valve core is arranged in the valve block, and the liquid flow channel and the liquid outlet hole are respectively communicated with the liquid inlet pore channel and the liquid outlet pore channel;
the method for reversely opening the valve comprises the following steps:
screwing the screw rod inwards to enable the screw rod to drive the valve rod to move forwards along the positioning sleeve, the front end of the valve rod pushes the sealing component, the elastic component is compressed, the sealing component is enabled to be separated from sealing the liquid inlet hole, the liquid inlet hole is opened, and the liquid inlet hole channel is communicated with the liquid outlet hole channel;
in a certain range, the larger the inward screwing distance of the screw rod is, the larger the opening degree of the liquid inlet hole is.
Preferably, a plurality of first supporting block parts are arranged on the front end face of the positioning sleeve of the valve core at intervals along the circumferential direction, a plurality of second supporting block parts are arranged on the periphery of the rear end of the valve sleeve at intervals, the front end face of each first supporting block part is supported on the top face of each second supporting block part, and a gap between each first supporting block part and each second supporting block part forms the liquid flow channel.
Compared with the prior art, the invention has the beneficial effects that:
1. the reversely-opened plug-in type stop valve comprises a valve block and a valve core, wherein the valve core comprises a switching assembly and an actuating mechanism, the switching assembly comprises a valve sleeve, a liquid inlet hole and a liquid outlet hole which are communicated are formed in the valve sleeve, a sealing part and an elastic part are arranged in the valve sleeve, the liquid inlet hole is blocked by the sealing part under the action of the elastic part, the actuating mechanism comprises a valve rod and a positioning sleeve, when the control valve core is opened, a thimble at the front end of the valve rod pushes the sealing part in the valve sleeve to open the liquid inlet hole, and therefore compared with the traditional valve core, the reversely-opened plug-in type stop valve opens the valve core by controlling the inward movement of the valve rod, and closes the valve core by controlling the outward movement of the valve rod.
2. The matching threads of the screw rod and the valve cover of the reversely-opened plug-in type stop valve are of a left-handed thread structure, so that the operation direction of a hand wheel is consistent with the operation direction of the conventional valve when the valve core is opened or closed, and the possibility of misoperation is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of a reversely-opened plug-in type stop valve according to the present invention.
Fig. 2 is a schematic perspective view of a valve element of an embodiment of a reverse opening cartridge stop valve according to the present invention.
FIG. 3 is an exploded view of the cartridge of an embodiment of the reverse opening cartridge stop valve of the present invention.
Fig. 4 is a sectional view of an opening and closing unit of a cartridge in an embodiment of a reverse opening cartridge type cut-off valve according to the present invention.
Fig. 5 is an exploded view of the valve cartridge opening and closing assembly of an embodiment of the reverse opening cartridge type stop valve of the present invention.
Fig. 6 is a schematic perspective view of a supporting sleeve of a valve element in an embodiment of a reversely-opening cartridge stop valve according to the present invention.
FIG. 7 is a sectional view of the cartridge of an embodiment of the reverse opening cartridge stop valve of the present invention.
In the drawings, each reference numeral means: the valve sleeve comprises a valve sleeve 1, a liquid inlet hole 11, a liquid outlet hole 12, a steel ball 13, a spring 14, a spring limiting seat 15, a screw 151, a pore passage 16, a support sleeve 17, a notch 171, a second sealing ring 18, a second support block part 19, a valve rod 2, a T-shaped hole 21, a first sealing ring 22, a positioning sleeve 3, a first support block part 31, a third sealing ring 32, a screw rod 4, a T-shaped block 41, a hand wheel 42, a valve cover 5, a screw hole 51 and a valve block 6.
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.
A plug-in type stop valve with reverse opening, please refer to fig. 1 to 7.
As shown in fig. 1, the reversely-opened plug-in type stop valve comprises a valve block 6 and a valve core, wherein a valve core installation cavity 63, a liquid inlet duct 61 and a liquid outlet duct 62 which are communicated with the valve core installation cavity 63 are arranged on the valve block 6, and the valve core is arranged in the valve core installation cavity 63.
The valve core comprises an opening and closing assembly and an executing mechanism arranged beside the opening and closing assembly, the executing mechanism is used for operating the opening and closing assembly to be opened and closed, when the opening and closing assembly is opened, the valve core is opened, and when the opening and closing assembly is closed, the valve core is closed.
As shown in fig. 2 to 5, the opening and closing assembly includes a valve housing 1, a liquid inlet hole 11 and a liquid outlet hole 12 communicated with each other are disposed on the valve housing 1, a sealing member and an elastic member are disposed inside the valve housing 1, and the sealing member blocks the liquid inlet hole under the action of the elastic member, wherein in this embodiment, the sealing member is a steel ball 13, the elastic member is a spring 14, a spring limiting seat 15 is disposed on the liquid outlet hole 12, the spring limiting seat 15 is mounted at a port of the liquid outlet hole 12 through a screw 151, the spring 14 is located in a duct 16 between the liquid inlet hole 11 and the liquid outlet hole 12, a bottom of the spring 14 is supported on the spring limiting seat 15, a top of the spring 14 is provided with a support sleeve 17, an outer circumferential surface of the support sleeve 17 is matched with an inner wall surface of the duct 16, so that the spring 14 does not incline during a stretching process, as shown in fig. 6, the support sleeve 17 is provided with a notch 171 for allowing fluid to pass through along a circumferential direction, so that the support sleeve 17 does not block the duct 16.
As shown in fig. 2 and 3, the actuator includes a valve rod 2 and a positioning sleeve 3, the valve rod 2 is disposed in the positioning sleeve 3, and a liquid flow channel is disposed between the valve sleeve 1 and the positioning sleeve 3, specifically, as shown in fig. 2 and 3, a plurality of first supporting block portions 31 are circumferentially disposed at intervals on a front end surface of the positioning sleeve 3, a plurality of second supporting block portions 19 are circumferentially disposed at intervals on a periphery of a rear end of the valve sleeve 1, and a front end surface of each first supporting block portion 31 is supported on a top surface of the corresponding second supporting block portion 19, so that a gap is formed between a front end of the positioning sleeve 3 and a rear end of the valve sleeve 1, and the gap is the liquid flow channel.
The valve sleeve 1 and the positioning sleeve 3 are not connected with each other, the valve sleeve 1 and the positioning sleeve 3 are fixedly arranged in the valve block 6, and as shown in a combined figure 7, when the valve rod 2 moves forwards along the positioning sleeve 3, the front end of the valve rod 2 can push the steel ball 13, so that the liquid inlet hole 11 is opened, and the valve core is opened.
Further, as shown in fig. 7, the reversely-opening cartridge type stop valve further includes a screw rod 4 and a valve cover 5, wherein a screw hole 51 corresponding to the screw rod 4 is formed in the valve cover 5, the screw rod 4 is screwed into the screw hole 51, and a connecting screw hole 52 is formed in the valve cover 5, so that the valve cover 5 can be mounted on the valve block. The front end of the screw rod 4 is connected to the rear end of the valve rod 2, as shown in fig. 3, a T-shaped hole 21 is formed in the rear end of the valve rod 2, a T-shaped block 41 is arranged at the front end of the screw rod 4, the T-shaped block 41 is clamped in the T-shaped hole 21, connection of the valve rod 2 and the screw rod 4 is achieved, a hand wheel 42 is arranged at the rear end of the screw rod 4, the rear end of the screw rod 4 is of a square structure, a corresponding square hole is formed in the middle of the hand wheel 42, the rear end of the screw rod 4 is matched with the square hole in the hand wheel 42 and is fixed through a screw, a gasket and the like, and when the screw rod 4 is screwed through the hand wheel 42, the valve rod 2 can be driven to move back and forth.
The matching threads of the screw rod 4 and the valve cover 5 are in a left-handed thread structure, so that the operation direction of a hand wheel is consistent with the operation direction of the conventional valve when the valve core is opened or closed, and the possibility of misoperation is reduced.
Further, as shown in fig. 7, a first sealing ring 22 is arranged between the valve rod 2 and the positioning sleeve 3, an annular groove is arranged on the periphery of the valve rod 2, and the first sealing ring 22 is arranged in the annular groove; the front end of the valve sleeve 1 is a conical surface, and a second sealing ring 18 is sleeved at the front end of the conical surface; a third sealing ring 32 is arranged outside the positioning sleeve 3, an annular groove is arranged on the periphery of the positioning sleeve 3, and the third sealing ring 32 is arranged in the annular groove.
As shown in fig. 1, the reversely-opened cartridge stop valve is used as follows:
and (3) closing the valve core: the screw rod 4 is driven to rotate by rotating the hand wheel 42, so that the screw rod is withdrawn outwards and drives the valve rod 2 to retreat, at the moment, the thimble at the front end of the valve rod 2 is separated from the steel ball 13 in the valve sleeve 1, and the steel ball 13 realizes the effect of sealing the liquid inlet hole 11 under the action of the elastic force of the spring 14.
Opening a valve core: the hand wheel 42 is rotated to drive the screw rod 4 to rotate, so that the screw rod moves inwards and pushes the valve rod 2 to move, a thimble at the front end of the valve rod 2 pushes the steel ball 13 in the valve sleeve 1 open, the liquid inlet hole 11 is opened, the liquid inlet T is communicated with the liquid outlet P, fluid flows back, and the distance of inward movement of the screw rod 4 is controlled to control the gap pushed by the steel ball 13, so that the flow rate of the fluid can be controlled.
A method of reversely opening a valve, the valve being the reversely-opening cartridge stop valve of the above embodiment, the method of reversely opening the valve being: referring to fig. 1, the screw rod 4 is screwed inwards, so that the screw rod 4 drives the valve rod 2 to move forwards along the positioning sleeve 3, the sealing part (the steel ball 13) is pushed by the front end of the valve rod 2, the elastic part (the spring 14) is compressed, the sealing part (the steel ball 13) is separated from the sealing of the liquid inlet hole 11, the liquid inlet hole 11 is opened, the liquid inlet hole channel 61 is communicated with the liquid outlet hole channel 62, and the valve is opened.
In addition, in a certain range, the larger the inward screwing distance of the screw rod 4 is, the larger the sealing component (steel ball 13) is separated from the sealing degree of the liquid inlet hole 11, and the larger the opening degree of the liquid inlet hole 11 is.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various 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 (10)
1. The utility model provides a reverse cartridge formula stop valve that opens which characterized in that includes:
the valve block is provided with a valve core installation cavity, and a liquid inlet pore passage and a liquid outlet pore passage which are communicated with the valve core installation cavity;
the valve core comprises a switching assembly, the switching assembly comprises a valve sleeve, a liquid inlet hole and a liquid outlet hole which are communicated are formed in the valve sleeve, a sealing part and an elastic part are arranged in the valve sleeve, and the sealing part blocks the liquid inlet hole under the action of the elastic part; an actuating mechanism is arranged beside the opening and closing assembly and comprises a valve rod and a positioning sleeve, the valve rod is arranged in the positioning sleeve, and a liquid flow channel is arranged between the valve sleeve and the positioning sleeve, so that liquid can reach the liquid inlet hole through the liquid flow channel; the valve core also comprises a screw and a valve cover, a screw hole corresponding to the screw is arranged in the valve cover, and the front end of the screw is connected to the rear end of the valve rod;
the valve core is arranged in the valve core mounting cavity of the valve block, the valve cover is connected to the valve block, the liquid flow channel and the liquid outlet hole are respectively communicated with the liquid inlet pore channel and the liquid outlet pore channel, and when the valve rod moves forwards along the positioning sleeve, the front end of the valve rod can push the sealing part, so that the liquid inlet hole is opened.
2. The reverse opening cartridge stop valve of claim 1, wherein: the front end face of the positioning sleeve is provided with a plurality of first supporting block parts at intervals along the circumferential direction, the periphery of the rear end of the valve sleeve is provided with a plurality of second supporting block parts at intervals, and the front end face of each first supporting block part is supported on the top face of each second supporting block part, so that the front end of the positioning sleeve and the rear end of the valve sleeve form the liquid flow channel.
3. The reverse opening cartridge stop valve of claim 1, wherein: the rear end of the valve rod is provided with a T-shaped hole, the front end of the screw rod is provided with a T-shaped block, and the T-shaped block is clamped in the T-shaped hole.
4. The reverse opening cartridge stop valve of claim 1, wherein: the elastic component is a spring, a spring limiting seat is installed on the liquid outlet hole, the spring is located in a pore channel between the liquid inlet hole and the liquid outlet hole, and the bottom of the spring is supported on the spring limiting seat.
5. The reverse opening cartridge stop valve of claim 4, wherein: the top of the spring is provided with a support sleeve, the peripheral surface of the support sleeve is matched with the inner wall surface of the pore channel, and the support sleeve is provided with a notch for passing through fluid along the circumferential direction.
6. The reverse opening cartridge stop valve of claim 1, wherein: the sealing component is a steel ball; and a hand wheel is arranged at the rear end of the screw rod.
7. The reverse opening cartridge stop valve of claim 1, wherein: a first sealing ring is arranged between the valve rod and the positioning sleeve; the front end of the valve sleeve is provided with a second sealing ring; and a third sealing ring is arranged outside the positioning sleeve.
8. The reverse opening cartridge stop valve of claim 1, wherein: the screw rod and the valve cover are matched in a left-handed thread structure.
9. A method of reversely opening a valve, comprising:
the valve comprises a valve block and a valve core, wherein the valve block is provided with a valve core installation cavity, and a liquid inlet pore channel and a liquid outlet pore channel which are communicated with the valve core installation cavity;
the valve core comprises an opening and closing assembly, the opening and closing assembly comprises a valve sleeve, a liquid inlet hole and a liquid outlet hole which are communicated are formed in the valve sleeve, a sealing part and an elastic part are arranged in the valve sleeve, and the sealing part blocks the liquid inlet hole under the action of the elastic part; an actuating mechanism is arranged beside the opening and closing assembly and comprises a valve rod and a positioning sleeve, the valve rod is arranged in the positioning sleeve, and a liquid flow channel is arranged between the valve sleeve and the positioning sleeve, so that liquid can reach the liquid inlet hole through the liquid flow channel; the valve core further comprises a screw and a valve cover, a screw hole corresponding to the screw is formed in the valve cover, and the front end of the screw is connected to the rear end of the valve rod; the valve core is arranged in the valve block, and the liquid flow channel and the liquid outlet hole are respectively communicated with the liquid inlet pore channel and the liquid outlet pore channel;
the method for reversely opening the valve comprises the following steps:
screwing the screw rod inwards to drive the valve rod to move forwards along the positioning sleeve, the front end of the valve rod pushes the sealing component, the elastic component is compressed to separate the sealing component from the sealing of the liquid inlet hole, the liquid inlet hole is opened, and the liquid inlet hole is communicated with the liquid outlet hole;
in a certain range, the larger the inward screwing distance of the screw rod is, the larger the opening degree of the liquid inlet hole is.
10. The method of reverse opening a valve of claim 9, wherein: the valve comprises a valve body, a valve core and a positioning sleeve, wherein the valve core is arranged in the valve body, the positioning sleeve is arranged on the valve body, the front end face of the positioning sleeve is provided with a plurality of first supporting block parts at intervals along the circumferential direction, the periphery of the rear end of the valve sleeve is provided with a plurality of second supporting block parts at intervals, the front end face of the first supporting block part is supported on the top face of the second supporting block part, and a gap between the first supporting block part and the second supporting block part forms a liquid flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210783408.5A CN115217810A (en) | 2022-07-05 | 2022-07-05 | Reversely-opened plug-in type stop valve and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210783408.5A CN115217810A (en) | 2022-07-05 | 2022-07-05 | Reversely-opened plug-in type stop valve and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115217810A true CN115217810A (en) | 2022-10-21 |
Family
ID=83610297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210783408.5A Pending CN115217810A (en) | 2022-07-05 | 2022-07-05 | Reversely-opened plug-in type stop valve and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115217810A (en) |
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2022
- 2022-07-05 CN CN202210783408.5A patent/CN115217810A/en active Pending
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