CN214838759U - Two-step opening emergency cut-off valve - Google Patents
Two-step opening emergency cut-off valve Download PDFInfo
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- CN214838759U CN214838759U CN202023332871.3U CN202023332871U CN214838759U CN 214838759 U CN214838759 U CN 214838759U CN 202023332871 U CN202023332871 U CN 202023332871U CN 214838759 U CN214838759 U CN 214838759U
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Abstract
The utility model relates to a two-step quick emergency valve of opening has the valve body, and the upper portion of valve body is equipped with the valve body, and the upper portion of going up the valve body is equipped with the valve gap, and the inner chamber of going up the valve body is equipped with the piston, when going up the piston downstream the lug portion promotes piston down. The valve body is provided with a first pipeline; the upper valve body is provided with a second pipeline; the upper valve cover is provided with a third pipeline and a fourth pipeline; a first cavity is formed between the bottom surface of the upper valve cover and the top surface of the piston part of the upper piston; a second cavity is formed between the bottom surface of the piston part of the upper piston and the cavity bottom of the inner cavity of the upper valve body. The first electromagnetic valve is electrically connected, and the upper piston moves downwards to push the lower piston to move downwards so that the cut-off valve is partially opened. The utility model discloses can reach the effect of pressure release, prevent that the shut-off valve from opening the time pressure liquid produces the liquid and hit, reduce the vibrations in the twinkling of an eye that the shut-off valve produced when opening, the protection shut-off valve is not fragile.
Description
Technical Field
The utility model belongs to the technical field of the trip valve technique and specifically relates to a two-step quick action emergency valve that opens.
Background
The emergency cut-off valve is a device capable of quickly cutting off an internal channel of a pipeline, and is mainly applied to pipelines needing emergency cut-off, such as a compressor exhaust pipeline, a high-pressure liquid storage tank outlet pipeline, a defrosting hot air pipeline and the like. The emergency cut-off valve can quickly cut off medium circulation in the pipeline, and safety protection under emergency is achieved. However, for example, when the emergency cut-off valve is applied to a high-pressure liquid pipeline, because the hydraulic pressure at an inlet is large, liquid is easy to generate liquid impact inside the pipeline when the cut-off valve is opened, and the liquid circulation pipeline generates instant vibration when the valve is opened, so that the cut-off valve is easy to damage.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the emergency cut-off valve is opened in two steps, pressure relief can be achieved when the cut-off valve is initially opened, liquid is prevented from being subjected to liquid impact when the cut-off valve is opened, and instantaneous vibration generated when the cut-off valve is opened is reduced.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a two-step open emergency cut-off valve, has the valve body, the valve body has the valve body inner chamber, the piston is equipped with down in the valve body inner chamber, the upper portion of valve body is equipped with the valve body, the upper portion of going up the valve body is equipped with the valve gap, the inner chamber of going up the valve body is equipped with the piston, it includes piston portion and lug portion to go up the piston, when going up the piston downstream the lug portion promotes piston down.
A first cavity is formed between the bottom surface of the upper valve cover and the top surface of the piston part of the upper piston; a second cavity is formed between the bottom surface of the piston part of the upper piston and the cavity bottom of the inner cavity of the upper valve body; and a third cavity is formed between the bottom surface of the upper valve body and the top surface of the lower piston.
The valve body is provided with a first pipeline; the upper valve body is provided with a second pipeline; the upper valve cover is provided with a third pipeline and a fourth pipeline; the top surface of the upper valve body is provided with a first ring groove, and the bottom surface of the upper valve cover is provided with a second ring groove.
The one end of first pipeline and the import cavity intercommunication of valve body, the other end of first pipeline and the one end intercommunication of second pipeline, the other end and the first annular intercommunication of second pipeline, first annular corresponds the intercommunication with the second annular, the one end and the second annular intercommunication of third pipeline, put through or cut by first solenoid valve between the other end of third pipeline and the one end of fourth pipeline, the other end and the first cavity intercommunication of fourth pipeline.
Preferably, the upper valve body is provided with a seventh pipeline; and the upper valve cover is provided with a fifth pipeline and a sixth pipeline.
One end of the fifth pipeline is communicated with the second annular groove, the other end of the fifth pipeline is communicated with one end of the sixth pipeline or cut off by the second electromagnetic valve, the other end of the sixth pipeline is communicated with one end of the seventh pipeline, and the other end of the seventh pipeline is communicated with the third cavity.
Preferably, the upper valve cover is provided with a first solenoid valve interface, a first solenoid valve is installed at the first solenoid valve interface, and when the first solenoid valve is powered on, a first valve seat cavity of the first solenoid valve is communicated with a first valve core cavity of the first solenoid valve; when the first electromagnetic valve is powered off, the first valve seat cavity of the first electromagnetic valve is cut off from the first valve core cavity of the first electromagnetic valve; the first valve seat cavity of the first electromagnetic valve is communicated with the third pipeline, the first valve core cavity of the first electromagnetic valve is communicated with the first electromagnetic valve interface, and the first electromagnetic valve interface is communicated with the fourth pipeline.
Preferably, the upper valve cover is provided with a second solenoid valve interface, a second solenoid valve is installed at the second solenoid valve interface, and when the second solenoid valve is powered on, a second valve seat cavity of the second solenoid valve is communicated with a second valve core cavity of the second solenoid valve; when the second electromagnetic valve is de-energized, the second valve seat cavity of the second electromagnetic valve is cut off from the second valve core cavity of the second electromagnetic valve; and a second valve seat cavity of the second electromagnetic valve is communicated with a fifth pipeline, a second valve core cavity of the second electromagnetic valve is communicated with a second electromagnetic valve interface, and the second electromagnetic valve interface is communicated with a sixth pipeline.
Preferably, the projection of the upper piston extends out of the bottom surface of the upper valve body, and the bottom surface of the projection of the upper piston is in contact with the top surface of the lower piston.
Preferably, the stop valve also has an upper ejector rod, the upper ejector rod passes through the upper valve cover to the first cavity, the upper ejector rod is connected with the upper valve cover through an ejector rod seat, and an upper ejector rod cap is further arranged on the upper ejector rod.
Preferably, the lower piston is connected with the valve rod, a connecting port is formed between the inlet cavity of the valve body and the inner cavity of the valve body, and the inner cavity of the valve body is communicated with the outlet cavity of the valve body; and a valve clack assembly is arranged at the connecting port.
The valve clack assembly comprises an adjusting block, a valve clack gasket, a valve clack pressing plate and a spring, and the adjusting block, the valve clack gasket and the valve clack pressing plate are arranged at the lower end part of the valve rod from top to bottom; the lower part of the valve body is provided with a lower valve cover, the upper end of the spring is propped against the valve clack pressing plate, and the lower end of the spring is propped against the lower valve cover; the lower valve cover is internally provided with a lower ejector rod, the lower part of the lower ejector rod is covered with a lower ejector rod cap, and the upper part of the lower ejector rod is connected with the spring of the valve clack assembly.
When the shut-off valve is in a closed state, the valve clack assembly enables the inlet cavity and the outlet cavity of the valve body to be cut off, and when the shut-off valve is in an open state, the valve clack assembly enables the inlet cavity and the outlet cavity of the valve body to be communicated.
Preferably, a lower flange gasket is arranged at the corresponding connection position of the lower valve cover and the valve body.
Preferably, a first flange gasket is arranged at the contact position of the valve body and the upper valve body, and a second flange gasket is arranged at the contact position of the upper valve body and the upper valve cover.
Preferably, two layers of guide rings are arranged between the lower piston and the valve body.
The invention has the beneficial effects that: when the cutoff valve is initially opened, the first electromagnetic valve is electrically connected, and the other end of the third pipeline is connected with one end of the fourth pipeline. The pressure medium that gets into from the import cavity of valve body circulates to first pipeline, the second pipeline, first annular, the second annular, the third pipeline, fourth pipeline to first cavity, consequently, it moves down to promote the upper piston, the upper piston moves down and promotes down the piston, the lower piston moves down and then makes the trip valve can partially open, if preferred trip valve opens 10%, appear partial space between the import cavity of trip valve and the export cavity, can make pressure medium flow from partial space, reach the effect of pressure release, prevent that the trip valve from opening the time pressure liquid and producing the liquid impact, reduce the vibrations in the twinkling of an eye that produce when the trip valve opens, the protection is not fragile.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic structural view of a shut-off valve of the present invention;
FIG. 2 is a partial schematic view at A of FIG. 1;
wherein: 1. the valve comprises a valve body, a valve body, a valve cover, a valve body, a valve bonnet, a valve piston, a valve plunger, a valve rod, a valve adjusting block, a valve clack gasket, a valve clack pressing plate, a spring, a valve rod, a valve adjusting block, a valve clack gasket, a valve clack pressing plate, a spring, a flange gasket, a first flange gasket, a guide ring, a valve cover, a valve bonnet, a valve piston, a valve rod, a valve clack gasket, a valve clack pressing plate, a spring, a flange gasket, a guide ring, a lower valve cover, a lower ejector rod and a lower ejector rod;
101. an inlet cavity 102, an outlet cavity 201, a first ring groove 301 and a second ring groove;
601. a first valve seat cavity, 602, a first valve core cavity, 701, a second valve seat cavity, 702, a second valve core cavity;
801. a first cavity, 802, a second cavity, 803, a third cavity;
901. a first pipeline, 902, a second pipeline, 903, a third pipeline, 904, a fourth pipeline, 905, a fifth pipeline, 906, a sixth pipeline, 907, and a seventh pipeline.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1 and 2, the two-step opening emergency cut-off valve has a valve body 1, the valve body 1 has a valve body inner cavity, a lower piston 5 is arranged in the valve body inner cavity, the upper portion of the valve body 1 is provided with an upper valve body 2, the upper portion of the upper valve body 2 is provided with an upper valve cover 3, the inner cavity of the upper valve body 2 is provided with an upper piston 4, the upper piston 4 comprises a piston part and a lug part, and the lug part pushes the lower piston 5 when the upper piston 4 moves downwards.
A first cavity 801 is formed between the bottom surface of the upper valve cover 3 and the top surface of the piston portion of the upper piston 4. A second cavity 802 is formed between the bottom surface of the piston part of the upper piston 4 and the cavity bottom of the inner cavity of the upper valve body 2. A third cavity 803 is formed between the bottom surface of the upper valve body 2 and the top surface of the lower piston 5.
The valve body 1 is provided with a first pipeline 901; the upper valve body 2 is provided with a second pipeline 902; the upper valve cover 3 is provided with a third pipeline 903 and a fourth pipeline 904; the top surface of the upper valve body 2 is provided with a first ring groove 201, and the bottom surface of the upper valve cover 3 is provided with a second ring groove 301.
One end of the first pipeline 901 is communicated with an inlet cavity of the valve body 1, the other end of the first pipeline 901 is communicated with one end of the second pipeline 902, the other end of the second pipeline 902 is communicated with the first annular groove 201, the first annular groove 201 is correspondingly communicated with the second annular groove 301, one end of the third pipeline 903 is communicated with the second annular groove 301, the other end of the third pipeline 903 is communicated with or cut off from one end of the fourth pipeline 904 through the first electromagnetic valve 6, and the other end of the fourth pipeline 904 is communicated with the first cavity 801.
When the cut-off valve is initially opened, the first electromagnetic valve 6 is electrically connected, and the other end of the third pipeline 903 is connected with one end of the fourth pipeline 904. The pressure medium that gets into from the import cavity of valve body circulates to first pipeline, the second pipeline, first annular, the second annular, the third pipeline, fourth pipeline to first cavity, consequently, it moves down to promote the piston, it moves in the inner chamber of last valve body to go up the piston, it moves down to promote down the piston down to go up the piston, down the piston moves down and then makes the trip valve can partially open, if preferred trip valve opens 10%, appear some gaps between the import cavity and the export cavity of trip valve, can make pressure medium flow from some gaps, reach the effect of pressure release, liquid produces the liquid hit when preventing the trip valve to open, reduce the vibrations in the twinkling of an eye that produce when the trip valve opens, it is not fragile to protect the trip valve.
Preferably, the upper valve body 2 is provided with a seventh pipeline 907; the upper valve cover 3 is provided with a fifth pipeline 905 and a sixth pipeline 906.
One end of the fifth pipeline 905 is communicated with the second annular groove 301, the other end of the fifth pipeline 905 is connected with or cut off from one end of the sixth pipeline 906 through a second electromagnetic valve 7, the other end of the sixth pipeline 906 is communicated with one end of a seventh pipeline 907, and the other end of the seventh pipeline 907 is communicated with the third cavity 803.
When the second electromagnetic valve is electrified, the other end of the fifth pipeline is communicated with one end of the sixth pipeline, pressure medium entering from the inlet cavity of the valve body flows to the first pipeline, the second pipeline, the first annular groove, the second annular groove, the fifth pipeline, the sixth pipeline, the seventh pipeline and the third cavity, so that the lower piston is continuously pushed to move downwards until the cut-off valve is completely opened, and the pressure medium flows between the inlet cavity and the outlet cavity completely.
Preferably, the upper valve cover 3 is provided with a first electromagnetic valve interface, a first electromagnetic valve 6 is installed at the first electromagnetic valve interface, and when the first electromagnetic valve 6 is powered on, the first valve seat cavity 601 of the first electromagnetic valve 6 is communicated with the first valve core cavity 602 of the first electromagnetic valve 6; when the first electromagnetic valve 6 is de-energized, the first valve seat cavity 601 of the first electromagnetic valve 6 is cut off from the first valve core cavity 602 of the first electromagnetic valve 6; the first valve seat cavity 601 of the first electromagnetic valve 6 is communicated with the third pipeline 903, the first valve core cavity 602 of the first electromagnetic valve 6 is communicated with a first electromagnetic valve interface, and the first electromagnetic valve interface is communicated with the fourth pipeline 904.
Preferably, when the first solenoid valve 6 is powered, the seal of the first solenoid valve 6 moves upwards to communicate the first valve seat chamber 601 with the first spool chamber 602 of the first solenoid valve 6. When the first solenoid valve 6 is de-energized, the seal of the first solenoid valve 6 falls so that the first seat chamber 601 of the first solenoid valve 6 is intercepted from the first spool chamber 602 of the first solenoid valve 6.
Preferably, the upper bonnet 3 is provided with a second solenoid valve interface, a second solenoid valve 7 is installed at the second solenoid valve interface, and when the second solenoid valve 7 is powered on, a second valve seat cavity 701 of the second solenoid valve 7 is communicated with a second valve core cavity 702 of the second solenoid valve; when the second solenoid valve 7 is de-energized, the second valve seat cavity 701 of the second solenoid valve 7 is cut off from the second valve core cavity 702 of the second solenoid valve 7; the second valve seat cavity 701 of the second solenoid valve 7 is communicated with a fifth pipeline 905, the second spool cavity 702 of the second solenoid valve 7 is communicated with a second solenoid valve interface, and the second solenoid valve interface is communicated with a sixth pipeline 906.
Preferably, when the second solenoid valve 7 is powered, the sealing element of the second solenoid valve 7 moves upwards to enable the second valve seat cavity 701 of the second solenoid valve 7 to be communicated with the second valve core cavity 702 of the second solenoid valve; when the second solenoid valve 7 is de-energized, the sealing member of the second solenoid valve 7 falls down to block the second valve seat chamber 701 of the second solenoid valve 7 from the second spool chamber 702 of the second solenoid valve 7.
Preferably, the projection of the upper piston 4 protrudes from the bottom surface of the upper valve body 2, and the bottom surface of the projection of the upper piston 4 is in contact with the top surface of the lower piston 5. The upper piston can push the lower piston to move downwards.
Preferably, the stop valve further comprises an upper ejector rod 10, the upper ejector rod 10 penetrates through the upper valve cover 3 to the first cavity 801, the upper ejector rod 10 is connected with the upper valve cover 3 through an ejector rod seat 11, and an upper ejector rod cap 12 is further arranged on the upper ejector rod 10. The shut-off valve can be closed manually by manually operating the upper ejector rod 10.
Preferably, the lower piston 5 is connected with a valve rod 13, a connecting port is arranged between an inlet cavity 101 of the valve body 1 and an inner cavity of the valve body, and the inner cavity of the valve body 1 is communicated with an outlet cavity 102 of the valve body 1; and a valve clack assembly is arranged at the connecting port.
The valve clack assembly comprises an adjusting block 14, a valve clack gasket 15, a valve clack pressing plate 16 and a spring 17, wherein the adjusting block 14, the valve clack gasket 15 and the valve clack pressing plate 16 are installed at the lower end part of the valve rod 13 from top to bottom; the lower part of the valve body 1 is provided with a lower valve cover 22, the upper end of the spring 17 is abutted against the valve clack pressing plate 16, and the lower end of the spring 17 is abutted against the lower valve cover 22; a lower ejector rod 23 is arranged in the lower valve cover 22, a lower ejector rod cap 24 is covered on the lower portion of the lower ejector rod 23, and the upper portion of the lower ejector rod 23 is connected with a spring 17 of the valve clack assembly.
When the cut-off valve is in a closed state, the valve flap assembly enables the inlet cavity 101 and the outlet cavity 102 of the valve body 1 to be cut off, and when the cut-off valve is in an open state, the valve flap assembly enables the inlet cavity 101 and the outlet cavity 102 of the valve body 1 to be communicated. When the trip valve is in the closed condition it is sealed between regulating block and the valve body, when the trip valve is in the open condition it has the space between regulating block and the valve body.
When need promptly cut off, but first solenoid valve, second solenoid valve of electronic shutoff, lower piston rebound under the spring action to drive upper piston rebound, and then close the trip valve. The lower ejector rod can also be manually operated, so that the lower piston moves upwards under the action of the spring and drives the upper piston to move upwards, and the stop valve is closed.
Preferably, the lower flange gasket 18 is arranged at the corresponding connection position of the lower valve cover 22 and the valve body 1.
Preferably, a first flange gasket 19 is installed at the contact position of the valve body 1 and the upper valve body 2, and a second flange gasket 20 is installed at the contact position of the upper valve body 2 and the upper valve cover 3.
Preferably, two layers of guide rings 21 are arranged between the lower piston 5 and the valve body 1.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a two-step open emergency cut-off valve, has valve body (1), valve body (1) has the valve body inner chamber, be equipped with lower piston (5) in the valve body inner chamber, its characterized in that: an upper valve body (2) is arranged on the upper portion of the valve body (1), an upper valve cover (3) is arranged on the upper portion of the upper valve body (2), an upper piston (4) is installed in an inner cavity of the upper valve body (2), the upper piston (4) comprises a piston portion and a protruding block portion, and the protruding block portion pushes a lower piston (5) when the upper piston (4) moves downwards;
a first cavity (801) is formed between the bottom surface of the upper valve cover (3) and the top surface of the piston part of the upper piston (4); a second cavity (802) is formed between the bottom surface of the piston part of the upper piston (4) and the cavity bottom of the inner cavity of the upper valve body (2); a third cavity (803) is formed between the bottom surface of the upper valve body (2) and the top surface of the lower piston (5);
the valve body (1) is provided with a first pipeline (901); the upper valve body (2) is provided with a second pipeline (902); the upper valve cover (3) is provided with a third pipeline (903) and a fourth pipeline (904); a first ring groove (201) is formed in the top surface of the upper valve body (2), and a second ring groove (301) is formed in the bottom surface of the upper valve cover (3);
one end of the first pipeline (901) is communicated with an inlet cavity of the valve body (1), the other end of the first pipeline (901) is communicated with one end of the second pipeline (902), the other end of the second pipeline (902) is communicated with the first annular groove (201), the first annular groove (201) is correspondingly communicated with the second annular groove (301), one end of the third pipeline (903) is communicated with the second annular groove (301), the other end of the third pipeline (903) is communicated with one end of the fourth pipeline (904) or cut off by the first electromagnetic valve (6), and the other end of the fourth pipeline (904) is communicated with the first cavity (801).
2. The two-step opening slam shut valve of claim 1 wherein: the upper valve body (2) is provided with a seventh pipeline (907); the upper valve cover (3) is provided with a fifth pipeline (905) and a sixth pipeline (906);
one end of the fifth pipeline (905) is communicated with the second annular groove (301), the other end of the fifth pipeline (905) and one end of the sixth pipeline (906) are connected or disconnected through a second electromagnetic valve (7), the other end of the sixth pipeline (906) is communicated with one end of the seventh pipeline (907), and the other end of the seventh pipeline (907) is communicated with the third cavity (803).
3. The two-step opening slam shut valve of claim 1 wherein: the upper valve cover (3) is provided with a first electromagnetic valve interface, a first electromagnetic valve (6) is installed at the first electromagnetic valve interface, and when the first electromagnetic valve (6) is electrified, a first valve seat cavity (601) of the first electromagnetic valve (6) is communicated with a first valve core cavity (602) of the first electromagnetic valve (6); when the first electromagnetic valve (6) is powered off, the first valve seat cavity (601) of the first electromagnetic valve (6) is cut off from the first valve core cavity (602) of the first electromagnetic valve (6); the first valve seat cavity (601) of the first electromagnetic valve (6) is communicated with a third pipeline (903), the first valve core cavity (602) of the first electromagnetic valve (6) is communicated with a first electromagnetic valve interface, and the first electromagnetic valve interface is communicated with a fourth pipeline (904).
4. The two-step opening slam shut valve of claim 1 wherein: a second solenoid valve interface is formed in the upper valve cover (3), a second solenoid valve (7) is installed at the second solenoid valve interface, and when the second solenoid valve (7) is powered on, a second valve seat cavity (701) of the second solenoid valve (7) is communicated with a second valve core cavity (702) of the second solenoid valve; when the second electromagnetic valve (7) is de-energized, the second valve seat cavity (701) of the second electromagnetic valve (7) is cut off from the second valve core cavity (702) of the second electromagnetic valve (7); and a second valve seat cavity (701) of the second electromagnetic valve (7) is communicated with a fifth pipeline (905), a second valve core cavity (702) of the second electromagnetic valve (7) is communicated with a second electromagnetic valve interface, and the second electromagnetic valve interface is communicated with a sixth pipeline (906).
5. The two-step opening slam shut valve of claim 1 wherein: the convex block part of the upper piston (4) extends out of the bottom surface of the upper valve body (2), and the bottom surface of the convex block part of the upper piston (4) is in contact with the top surface of the lower piston (5).
6. The two-step opening slam shut valve of claim 1 wherein: the trip valve still has ejector pin (10), go up ejector pin (10) and pass upper valve lid (3) to first cavity (801), go up ejector pin (10) and be connected with upper valve lid (3) through ejector pin seat (11), still be equipped with ejector pin cap (12) on going up ejector pin (10).
7. The two-step opening slam shut valve of claim 1 wherein: the lower piston (5) is connected with a valve rod (13), a connecting port is formed between an inlet cavity (101) of the valve body (1) and an inner cavity of the valve body, and the inner cavity of the valve body (1) is communicated with an outlet cavity (102) of the valve body (1); a valve clack assembly is arranged at the connecting opening;
the valve clack assembly comprises an adjusting block (14), a valve clack gasket (15), a valve clack pressing plate (16) and a spring (17), wherein the adjusting block (14), the valve clack gasket (15) and the valve clack pressing plate (16) are arranged at the lower end part of the valve rod (13) from top to bottom; a lower valve cover (22) is arranged at the lower part of the valve body (1), the upper end of the spring (17) is abutted against the valve clack pressing plate (16), and the lower end of the spring (17) is abutted against the lower valve cover (22); a lower ejector rod (23) is arranged in the lower valve cover (22), a lower ejector rod cap (24) is covered on the lower part of the lower ejector rod (23), and the upper part of the lower ejector rod (23) is connected with a spring (17) of the valve clack assembly;
when the cut-off valve is in a closed state, the valve flap assembly enables the inlet cavity (101) and the outlet cavity (102) of the valve body (1) to be cut off, and when the cut-off valve is in an open state, the valve flap assembly enables the inlet cavity (101) and the outlet cavity (102) of the valve body (1) to be communicated.
8. The two-step opening slam shut valve of claim 7 wherein: and a lower flange gasket (18) is arranged at the corresponding connection part of the lower valve cover (22) and the valve body (1).
9. The two-step opening slam shut valve of claim 1 wherein: a first flange gasket (19) is arranged at the contact position of the valve body (1) and the upper valve body (2), and a second flange gasket (20) is arranged at the contact position of the upper valve body (2) and the upper valve cover (3).
10. The two-step opening slam shut valve of claim 1 wherein: two layers of guide rings (21) are arranged between the lower piston (5) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332871.3U CN214838759U (en) | 2020-12-30 | 2020-12-30 | Two-step opening emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332871.3U CN214838759U (en) | 2020-12-30 | 2020-12-30 | Two-step opening emergency cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214838759U true CN214838759U (en) | 2021-11-23 |
Family
ID=78875071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023332871.3U Active CN214838759U (en) | 2020-12-30 | 2020-12-30 | Two-step opening emergency cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214838759U (en) |
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2020
- 2020-12-30 CN CN202023332871.3U patent/CN214838759U/en active Active
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