CN210770473U - Safety valve with pneumatic device - Google Patents
Safety valve with pneumatic device Download PDFInfo
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- CN210770473U CN210770473U CN201921661879.9U CN201921661879U CN210770473U CN 210770473 U CN210770473 U CN 210770473U CN 201921661879 U CN201921661879 U CN 201921661879U CN 210770473 U CN210770473 U CN 210770473U
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Abstract
The utility model relates to a safety valve with a pneumatic device, which comprises a valve body, a valve seat, a valve clack, a recoil disc, a guide sleeve, a valve cover, a valve rod, a main spring and an adjusting screw sleeve; the method is characterized in that: the pneumatic device is arranged above the valve cover and comprises a cylinder and a piston, the lower end of the cylinder is fixedly and hermetically connected to the upper end of the valve cover, the outer circular surface of the piston is in dynamic sealing fit with the inner wall of the cylinder, the center of the piston is fixedly connected with the valve rod, an upper piston cavity is formed between the upper end surface of the piston and the cylinder, a lower piston cavity is formed between the lower end surface of the piston and the cylinder, an upper air pressure port is formed in the upper piston cavity, and a lower air pressure port is formed in the lower piston. When the safety valve cannot be opened or needs to be manually opened in advance, the safety valve can be forcibly opened by using a pneumatic device, and the safety valve has the advantages of accurate setting pressure and manual pressure relief control; when the valve can not return to the seat or can not be closed, the valve can be forcibly closed through the pneumatic device, and the valve has the advantage of high safety and reliability.
Description
Technical Field
The utility model belongs to the valve field especially relates to a spring relief valve.
Background
The prior spring type safety valve comprises a valve body, a valve seat, a valve clack, a recoil disc, a guide sleeve, a valve cover, a main spring, an adjusting screw sleeve and a valve rod, wherein the upper end of the valve seat is provided with a valve seat sealing surface and is arranged at an inlet channel of the valve body through threads, the valve cover is arranged at the upper end of the valve body, the inner part of the guide sleeve is provided with a through hole, the upper end of the guide sleeve is fixedly arranged between the valve body and the valve cover, the lower end of the guide sleeve extends to an inner cavity of the valve body, the upper part of the recoil disc extends to the through hole, the valve clack is arranged between the recoil disc and the valve seat, the lower end surface of the valve clack is provided with a valve clack sealing surface capable of forming sealing with the valve seat sealing surface, the main spring is vertically arranged in the inner cavity of the valve cover, the lower end of the adjusting, promote recoil dish and valve clack and move down, make the sealed face of valve clack compress tightly the sealed face of valve seat, adjust the compression capacity of main spring through adjusting the swivel nut, preset a pressure value of setting, when relief valve inlet side medium pressure rose to the pressure value of setting, the valve clack was opened, when relief valve inlet side medium pressure declined and reached normal pressure value, the valve clack was closed, and its shortcoming lies in: when the medium pressure of the safety valve at the inlet side reaches the preset setting pressure and is not opened, the safety valve cannot be manually operated to be opened; in addition, when the medium pressure of the safety valve at the inlet side is recovered to a normal pressure value and the safety valve cannot be closed, manual operation cannot be performed to close the safety valve, and the safety reliability is poor.
Disclosure of Invention
The utility model discloses shortcoming to prior art exists provides one kind can manual operation open and close, improves and opens and close the reliability, the good take pneumatic means's of safety protection performance relief valve.
The technical proposal of the utility model comprises a valve body, a valve seat, a valve clack, a recoil disc, a guide sleeve, a valve cover, a valve rod, a main spring and an adjusting screw sleeve, wherein the upper end of the valve seat is provided with a valve seat sealing surface, the valve body is arranged at an inlet channel of the valve body through threads, the valve cover is arranged at the upper end of the valve body, a through hole is formed in the inner part of the guide sleeve, the upper end of the guide sleeve is fixedly arranged between the valve body and the valve cover, the lower end of the guide sleeve extends to an inner cavity of the valve body, the upper part of the recoil disc is in movable fit with the through hole of the guide sleeve, the valve clack is arranged at the center of the lower end face of the recoil disc, the lower end face of the valve clack is provided with a valve clack sealing face which forms a seal with a valve seat sealing face, the main spring is vertically arranged in the inner cavity of the valve cover, the adjusting screw sleeve is arranged at the upper part of the valve cover through threads; the method is characterized in that: the pneumatic device is arranged above the valve cover and comprises a cylinder and a piston, the lower end of the cylinder is fixedly and hermetically connected to the upper end of the valve cover, the outer circular surface of the piston is in dynamic sealing fit with the inner wall of the cylinder, the center of the piston is fixedly connected with the valve rod, an upper piston cavity is formed between the upper end surface of the piston and the cylinder, a lower piston cavity is formed between the lower end surface of the piston and the cylinder, an upper air pressure port is formed in the upper piston cavity, and a lower air pressure port is formed in the lower piston.
Preferably, the upper end of the cylinder is fixedly connected with an upper piston cylinder, an inner cavity of the upper piston cylinder is provided with an upper piston, the outer circular surface of the upper piston is in dynamic sealing fit with the wall of the inner cavity of the upper piston cylinder, the center of the upper piston is fixedly connected with the upper end of the valve rod through a lifting rod, an upper air pressure cavity is formed between the upper end surface of the upper piston and the upper piston cylinder, a lower air pressure cavity is formed between the lower end surface of the upper piston and the upper piston cylinder, and the upper air pressure cavity and the lower air pressure cavity.
Preferably, the lower end of the cylinder is fixedly connected with the upper end of the valve cover through a lower positioning sleeve, the lower positioning sleeve is mutually connected with an external thread at the upper end of the valve cover through an internal thread, the lower end of the cylinder is fixedly and hermetically connected with the lower positioning sleeve through a lower connecting ring, a guide cylinder is arranged on the upper end surface of the lower positioning sleeve, and a guide hole which is in dynamic sealing fit with the guide cylinder on the lower positioning sleeve is arranged on the lower end surface of the piston.
Preferably, the lower end of the upper piston cylinder is fixedly connected with the upper end of the air cylinder through an upper positioning sleeve, the upper positioning sleeve is mutually connected with an external thread at the upper end of the air cylinder through an internal thread, the lower end of the upper piston cylinder is fixedly and hermetically connected with the upper positioning sleeve through an upper connecting ring, a guide cylinder is arranged on the upper end face of the upper positioning sleeve, and a guide hole which is in dynamic sealing fit with the guide cylinder on the upper end face of the upper positioning sleeve is arranged on the lower end face of the.
The utility model has the advantages that: when the safety valve cannot be opened or needs to be manually opened in advance, the safety valve can be forcibly opened by using a pneumatic device, and the safety valve has the advantages of accurate setting pressure and manual pressure relief control; when the valve can not return to the seat or can not be closed, the valve can be forcibly closed through the pneumatic device, and the valve has the advantage of high safety and reliability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in figure 1, the safety valve with a pneumatic device comprises a valve body 1, a valve seat 2, a valve clack 3, a recoil disc 4, a guide sleeve 5, a valve cover 6, a valve rod 7, a main spring 8 and an adjusting screw sleeve 9, wherein the upper end of the valve seat 2 is provided with a valve seat sealing surface and is arranged at an inlet channel of the valve body 1 through threads, the valve cover 6 is arranged at the upper end of the valve body 1, a through hole is arranged inside the guide sleeve 5, the upper end of the guide sleeve 5 is fixedly arranged between the valve body 1 and the valve cover 6, the lower end of the guide sleeve 5 extends to an inner cavity of the valve body 1, the upper part of the recoil disc 4 is in movable fit with the through hole of the guide sleeve 5, the valve clack 3 is arranged at the center of the lower end surface of the recoil disc 4, the lower end surface of the valve clack 3 is provided with a sealing surface which is sealed with the valve seat 2, the main spring 8 is vertically, the upper end of the valve rod 7 upwards penetrates through the main spring 8 and the valve cover 6 and extends upwards, and the lower end of the main spring 8 is connected with a radial step in the middle of the valve rod 7; the method is characterized in that: the pneumatic device is arranged above the valve cover 6 and comprises a cylinder 15 and a piston 14, the lower end of the cylinder 15 is fixedly and hermetically connected to the upper end of the valve cover 6, the outer circular surface of the piston 14 is in dynamic sealing fit with the inner wall of the cylinder 15, the center of the piston 14 is fixedly connected with the valve rod 7, an upper piston cavity 16 is formed between the upper end surface of the piston 14 and the cylinder 15, a lower piston cavity 13 is formed between the lower end surface of the piston 14 and the cylinder 15, the upper piston cavity 16 is provided with an upper air pressure port 23, and the lower piston cavities 13 are respectively provided with a lower air pressure port 12. When the pressure container needs manual pressure relief, air pressure is input into the lower air pressure port 12 to forcibly open the valve clack 3; when the valve clack 3 can not be closed, air pressure is input into the upper air pressure port 23 to forcibly close the valve clack 3, so that the system safety when the valve fails is protected.
The upper end of the air cylinder 15 is fixedly connected with an upper piston cylinder 22, an inner cavity of the upper piston cylinder 22 is provided with an upper piston 21, the outer circular surface of the upper piston 21 is in dynamic sealing fit with the wall of the inner cavity of the upper piston cylinder 22, the center of the upper piston 21 is fixedly connected with the upper end of the valve rod 7 through a lifting rod 26, an upper air pressure cavity 24 is formed between the upper end surface of the upper piston 21 and the upper piston cylinder 22, a lower air pressure cavity 20 is formed between the lower end surface of the upper piston 21 and the upper piston cylinder 22, the upper air pressure cavity 24 is provided with an upper air pressure interface 25, and the. When the pressure container needs manual pressure relief, air pressure is simultaneously input into the lower air pressure port 19 and the lower air pressure port 12, and the valve clack 3 is forcibly opened; when the valve clack 3 can not be closed, air pressure is input into the upper air pressure port 25 and the upper air pressure port 23 at the same time, the valve clack 3 is forcibly closed, and the reliability of opening and closing the valve clack 3 is improved.
The lower end of the cylinder 15 is fixedly connected with the upper end of the valve cover 6 through a lower positioning sleeve 11, the lower positioning sleeve 11 is connected with the outer thread of the upper end of the valve cover 6 through an inner thread, the lower end of the cylinder 15 is fixedly and hermetically connected with the lower positioning sleeve 11 through a lower connecting ring 10, a guide cylinder is arranged on the upper end face of the lower positioning sleeve 11, and a guide hole in dynamic sealing fit with the guide cylinder on the lower positioning sleeve 11 is arranged on the lower end face of the piston 14.
The lower end of the upper piston cylinder 22 is fixedly connected with the upper end of the air cylinder 15 through an upper positioning sleeve 18, the upper positioning sleeve 18 is connected with the external thread of the upper end of the piston cylinder 15 through internal threads, the lower end of the upper piston cylinder 22 is fixedly and hermetically connected with the upper positioning sleeve 18 through an upper connecting ring 17, a guide cylinder is arranged on the upper end face of the upper positioning sleeve 18, and a guide hole matched with the guide cylinder on the upper end face of the upper positioning sleeve 18 in a dynamic sealing mode is arranged on the lower end face of the upper piston 21.
Claims (4)
1. A safety valve with a pneumatic device comprises a valve body (1), a valve seat (2), a valve flap (3), a recoil disc (4), a guide sleeve (5), a valve cover (6), a valve rod (7), a main spring (8) and an adjusting screw sleeve (9), wherein the upper end of the valve seat (2) is provided with a valve seat sealing surface and is arranged at an inlet channel of the valve body (1) through threads, the valve cover (6) is arranged at the upper end of the valve body (1), a through hole is formed in the guide sleeve (5), the upper end of the guide sleeve (5) is fixedly arranged between the valve body (1) and the valve cover (6), the lower end of the guide sleeve (5) extends to an inner cavity of the valve body (1), the upper part of the recoil disc (4) is in movable fit with the through hole of the guide sleeve (5), the valve flap (3) is arranged at the center of the lower end surface of the recoil disc (4), the lower end surface of the valve flap (3), the adjusting screw sleeve (9) is arranged on the upper part of the valve cover (6) through threads, the lower end of the adjusting screw sleeve (9) is connected with the upper end of a main spring (8), the lower end of the valve rod (7) is connected with the upper part of the recoil disc (4), the upper end of the valve rod (7) upwards penetrates through the main spring (8) and the valve cover (6) and extends upwards, and the lower end of the main spring (8) is connected with a radial step in the middle of the valve rod (7); the method is characterized in that: be equipped with pneumatic means above valve gap (6), this pneumatic means includes cylinder (15) and piston (14), cylinder (15) lower extreme fixed seal connects in valve gap (6) upper end, piston (14) excircle face and cylinder (15) inner wall movive seal cooperation, piston (14) center and valve rod (7) fixed connection, constitute between piston (14) up end and cylinder (15) and go up piston chamber (16), constitute down piston chamber (13) between piston (14) lower terminal surface and cylinder (15), it is equipped with atmospheric pressure mouth (23) to go up piston chamber (16), lower piston chamber (13) are equipped with down atmospheric pressure mouth (12) respectively.
2. The safety valve with the pneumatic device according to claim 1, wherein the upper end of the cylinder (15) is fixedly connected with an upper piston cylinder (22), an upper piston (21) is arranged in an inner cavity of the upper piston cylinder (22), the outer circular surface of the upper piston (21) is in dynamic sealing fit with the wall of the inner cavity of the upper piston cylinder (22), the center of the upper piston (21) is fixedly connected with the upper end of the valve rod (7) through a lifting rod (26), an upper pneumatic cavity (24) is formed between the upper end surface of the upper piston (21) and the upper piston cylinder (22), a lower pneumatic cavity (20) is formed between the lower end surface of the upper piston (21) and the upper piston cylinder (22), the upper pneumatic cavity (24) is provided with an upper pneumatic connector (25), and the lower pneumatic cavity (20) is provided with a lower.
3. The safety valve with the pneumatic device according to claim 1, wherein the lower end of the cylinder (15) is fixedly connected with the upper end of the valve cover (6) through a lower positioning sleeve (11), the lower positioning sleeve (11) is internally connected with an external thread at the upper end of the valve cover (6), the lower end of the cylinder (15) is fixedly and hermetically connected with the lower positioning sleeve (11) through a lower connecting ring (10), a guide cylinder is arranged on the upper end surface of the lower positioning sleeve (11), and a guide hole which is in dynamic sealing fit with the guide cylinder on the lower positioning sleeve (11) is arranged on the lower end surface of the piston (14).
4. The safety valve with the pneumatic device according to claim 2, characterized in that the upper piston cylinder (22) is fixedly connected with the cylinder (15) through an upper positioning sleeve (18), the upper positioning sleeve (18) is connected with an external thread at the upper end of the cylinder (15) through an internal thread, the lower end of the upper piston cylinder (22) is fixedly and hermetically connected with the upper positioning sleeve (18) through an upper connecting ring (17), a guide cylinder is arranged on the upper end surface of the upper positioning sleeve (18), and a guide hole which is in dynamic sealing fit with the guide cylinder on the upper end surface of the upper positioning sleeve (18) is arranged on the lower end surface of the upper piston (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921661879.9U CN210770473U (en) | 2019-10-08 | 2019-10-08 | Safety valve with pneumatic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921661879.9U CN210770473U (en) | 2019-10-08 | 2019-10-08 | Safety valve with pneumatic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210770473U true CN210770473U (en) | 2020-06-16 |
Family
ID=71060455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921661879.9U Active CN210770473U (en) | 2019-10-08 | 2019-10-08 | Safety valve with pneumatic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210770473U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325227A (en) * | 2022-10-14 | 2022-11-11 | 哈电集团哈尔滨电站阀门有限公司 | Safety valve with pneumatic auxiliary mechanism |
| WO2024032240A1 (en) * | 2022-08-12 | 2024-02-15 | 上海电子信息职业技术学院 | Double-safety intelligent safety valve |
-
2019
- 2019-10-08 CN CN201921661879.9U patent/CN210770473U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032240A1 (en) * | 2022-08-12 | 2024-02-15 | 上海电子信息职业技术学院 | Double-safety intelligent safety valve |
| CN115325227A (en) * | 2022-10-14 | 2022-11-11 | 哈电集团哈尔滨电站阀门有限公司 | Safety valve with pneumatic auxiliary mechanism |
| CN115325227B (en) * | 2022-10-14 | 2023-02-21 | 哈电集团哈尔滨电站阀门有限公司 | Safety valve with pneumatic auxiliary mechanism |
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