CN210240689U - Slide bar quick-opening safety valve - Google Patents
Slide bar quick-opening safety valve Download PDFInfo
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- CN210240689U CN210240689U CN201920625743.6U CN201920625743U CN210240689U CN 210240689 U CN210240689 U CN 210240689U CN 201920625743 U CN201920625743 U CN 201920625743U CN 210240689 U CN210240689 U CN 210240689U
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- bin
- adjusting screw
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Abstract
An object of the utility model is to provide a slide bar quick-open relief valve, its technical scheme who specifically adopts as follows: a slide bar quick-opening safety valve mainly comprises: the valve core is of a stepped shaft structure with three pistons, the pressure difference is made up by using the area difference of the pistons, the opening and closing of a larger flow cross section are realized by using smaller thrust, and the installation pressure of the spring is reduced.
Description
Technical Field
The utility model relates to the field of mechanical engineering, fluid machinery etc, concretely relates to slide bar quick-open relief valve.
Background
The safety valve is a pressure relief valve for preventing equipment from being damaged due to overhigh internal pressure in a pressure container, a pipeline and reaction equipment in the process industrial production, and corresponding opening pressure needs to be set according to different safety valves of the pressure container, the pipeline and the reaction equipment under working pressure. The existing safety valve basically adopts a spring compression type sealing mode. Such safety valves are slow to open and have limited pressure relief capability. The working pressure of high-pressure reaction equipment in chemical production is hundreds of megapascals, and in order to ensure a better pressure relief effect, the flow section of an outlet of a valve must be large enough, so that the installation pressure of a spring is large under the condition of ensuring that the opening pressure is large enough, and the safety valve is large in spring, heavy and difficult to install.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a slide bar quick-open relief valve, its technical scheme who specifically adopts as follows:
a slide bar quick-opening safety valve mainly comprises: the valve comprises a shell 1, a valve core 2, a spring 3, a rear cover 4, a screw 5, an elastic force adjusting screw 6 and a nut 7;
the shell 1 is mainly of a hollow shell structure, a first cylindrical bin 9 and a second cylindrical bin 8 are arranged in the shell, the first cylindrical bin 9 and the second cylindrical bin 8 are respectively connected with two flanges through pipelines, the pipeline corresponding to the flange at the bottom is a water inlet pipe, the pipeline corresponding to the flange at the top is a water outlet pipe, a cylindrical channel with the diameter smaller than that of the first cylindrical bin 9 and the second cylindrical bin 8 is transversely arranged between the first cylindrical bin 9 and the second cylindrical bin 8 and transversely penetrates through the first cylindrical bin 9 and the second cylindrical bin 8, a cylindrical piston cavity with the smaller diameter is arranged at the end part of the first cylindrical bin 9 of the cylindrical channel, and the tail end of the cylindrical piston cavity is communicated with the water inlet pipe through a liquid guide pipe 10; the cylindrical channel is open on one side of the second cylindrical bin 8, and a flange with a threaded hole is arranged at the end part of the cylindrical channel.
The valve core 2 is of a stepped shaft structure with three pistons, and the three pistons are a small piston 11, a sealing piston 12 and a long piston 13 in sequence. The small piston 11, the sealing piston 12 and the long piston 13 are connected together through a thinner shaft; the outer diameter of the small piston 11 is the same as the inner diameter of a cylindrical piston cavity arranged at the end part of the cylindrical channel at one side of the cylindrical bin I9, and the small piston is assembled in the cylindrical piston cavity and can slide left and right along the cylindrical piston cavity; the outer diameters of the sealing piston 12 and the long piston 13 are the same as the inner diameter of a cylindrical channel transversely arranged between the first cylindrical bin 9 and the second cylindrical bin 8, and the sealing piston 12 and the long piston 13 are of hollow structures and can slide left and right in the cylindrical channel.
The main body of the rear cover 4 is of a cylindrical shell structure, one end of the rear cover is provided with a four-hole flange, the rear cover is matched with a tail end flange of a cylindrical channel of the shell 1 and is fixedly assembled through a screw 5; an elliptic opening is formed in the cylindrical wall of the rear cover 4; and a threaded interface is arranged at the tail end of the rear cover 4.
The main body of the elastic adjusting screw 6 is of a stepped shaft structure, the head part is a flat cylindrical table with the outer diameter slightly smaller than the inner diameter of the cylindrical inner cavity of the rear cover 4, the rear part is a slender shaft with threads, and a torque transmission interface formed by two planes is arranged at the end part of each thread. The elastic adjusting screw 6 is arranged in the rear cover 4, the tail part of the elastic adjusting screw is matched with the rear cover 4 through a thread pair, and the nut 7 is matched with a thread shaft of the elastic adjusting screw 6 and forms extrusion force with the outer side end surface of the rear cover 4 to fix the elastic adjusting screw 6.
The spring 3 is arranged in a cylindrical space formed by the valve core 2, the shell 1 and the rear cover 4, and two ends of the spring are respectively pressed on the tail part of the valve core 2 and the head end surface of the elastic force adjusting screw 6.
When the pressure in the container exceeds the required pressure, the fluid enters the cylindrical piston cavity with smaller diameter at the end part of one side 9 of the cylindrical bin through the water inlet pipe 10 to push the small piston 11, and further drives the valve core 2 to compress the spring 3 and slide to the right. The sealing piston 12 and the long piston 13 slide along with the sliding, the long piston 13 is separated from the cylindrical channel part between the first cylindrical bin 9 and the second cylindrical bin 8, the first cylindrical bin 9 is communicated with the second cylindrical bin 8, and the valve is opened. The fluid flows out of the container through the water inlet pipe, the first cylindrical bin 9, the second cylindrical bin 8 and the water outlet pipe in sequence.
When the pressure in the container is reduced to the allowable pressure, the thrust of the spring 3 is larger than the thrust of the fluid to the small piston 11 because the pressure of the fluid in the container is reduced, and the valve core moves leftwards under the action of the thrust of the spring to close the valve.
The utility model has the advantages that: since the liquid thrust of the fluid acting on the small piston 11 through the catheter 10 during the opening and closing of the valve is compared with the elastic force of the spring 3, the pressure and stress formula is as follows: power is the pressure x area, and the lifting surface area of little piston 11 is little, consequently overcomes the thrust of spring and just needs great liquid pressure, and is same, when liquid pressure is certain, has reduced lifting surface area through little piston, so required spring thrust just diminishes, thereby realizes the utility model discloses the purpose of the relief valve of pressure is opened greatly to the spring control that uses less elasticity coefficient, and spring elasticity coefficient is little, installs more easily.
Drawings
FIG. 1 is a schematic cross-sectional view of the internal structure of the closed state of the present invention;
FIG. 2 is a schematic sectional view of the internal structure of the utility model in an open state;
FIG. 3 is a schematic view of the external structure of the present invention;
FIG. 4 is a schematic view of the valve core structure of the present invention;
FIG. 5 is a schematic view of the structure of the rear cover of the present invention;
FIG. 6 is a schematic view of the elastic force adjusting screw of the present invention;
in the figure: the device comprises a shell 1, a valve core 2, a spring 3, a rear cover 4, a screw 5, an elastic force adjusting screw 6, a nut 7, a cylindrical bin II 8, a cylindrical bin I9, a liquid guide pipe 10, a small piston 11, a sealing piston 12 and a long piston 13.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a preferred embodiment of the present invention.
Referring to the drawings, the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function and the achievable purpose of the present invention. Meanwhile, the position limitation terms cited in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the changes or adjustments of the relative relationship thereof should be considered as the scope of the present invention without substantial changes in the technical content.
As shown in the figure, fig. 1 is a schematic cross-sectional view of the internal structure principle of the closed state of the present invention; as shown in fig. 2, it is a schematic cross-sectional view of the internal structure principle of the open state of the present invention; as shown in fig. 3, is an external structure diagram of the present invention. A slide bar quick-opening safety valve mainly comprises: the valve comprises a shell 1, a valve core 2, a spring 3, a rear cover 4, a screw 5, an elastic force adjusting screw 6 and a nut 7.
The shell 1 is characterized in that a main body is of a hollow shell structure, a first cylindrical bin 9 and a second cylindrical bin 8 are arranged in the shell, the first cylindrical bin 9 and the second cylindrical bin 8 are respectively connected with two flanges through pipelines, the pipeline corresponding to a flange at the bottom is a water inlet pipe, the pipeline corresponding to a flange at the top is a water outlet pipe, a cylindrical channel with the diameter smaller than that of the first cylindrical bin 9 and that of the second cylindrical bin 8 are transversely arranged between the first cylindrical bin 9 and the second cylindrical bin 8 and transversely penetrate through the first cylindrical bin 9 and the second cylindrical bin 8, a cylindrical piston cavity with the smaller diameter is arranged at the end part of the cylindrical channel on one side of the first cylindrical bin 9, and the tail end of the cylindrical piston cavity is communicated with the water inlet pipe through a; the cylindrical channel is open on one side of the second cylindrical bin 8, and a flange with a threaded hole is arranged at the end part of the cylindrical channel.
As shown in fig. 4, is a schematic view of the valve core structure of the present invention; the valve core 2 is of a stepped shaft structure with three pistons, and the three pistons are a small piston 11, a sealing piston 12 and a long piston 13 in sequence. The small piston 11, the sealing piston 12 and the long piston 13 are connected together through a thinner shaft; the outer diameter of the small piston 11 is the same as the inner diameter of a cylindrical piston cavity arranged at the end part of the cylindrical channel at one side of the cylindrical bin I9, and the small piston is assembled in the cylindrical piston cavity and can slide left and right along the cylindrical piston cavity; the outer diameters of the sealing piston 12 and the long piston 13 are the same as the inner diameter of a cylindrical channel transversely arranged between the first cylindrical bin 9 and the second cylindrical bin 8, and the sealing piston 12 and the long piston 13 are of hollow structures and can slide left and right in the cylindrical channel.
As shown in fig. 5, it is a schematic view of the structure of the rear cover of the present invention; the main body of the rear cover 4 is of a cylindrical shell structure, one end of the rear cover is provided with a four-hole flange, the rear cover is matched with a tail end flange of a cylindrical channel of the shell 1 and is fixedly assembled through a screw 5; an elliptic opening is formed in the cylindrical wall of the rear cover 4; and a threaded interface is arranged at the tail end of the rear cover 4.
As shown in fig. 6, it is a schematic view of the structure of the elastic force adjusting screw of the present invention; the main body of the elastic adjusting screw 6 is of a stepped shaft structure, the head part is a flat cylindrical table with the outer diameter slightly smaller than the inner diameter of the cylindrical inner cavity of the rear cover 4, the rear part is a slender shaft with threads, and a torque transmission interface formed by two planes is arranged at the end part of each thread. The elastic adjusting screw 6 is arranged in the rear cover 4, the tail part of the elastic adjusting screw is matched with the rear cover 4 through a thread pair, and the nut 7 is matched with a thread shaft of the elastic adjusting screw 6 and forms extrusion force with the outer side end surface of the rear cover 4 to fix the elastic adjusting screw 6. The spring 3 is arranged in a cylindrical space formed by the valve core 2, the shell 1 and the rear cover 4, and two ends of the spring are respectively pressed on the tail part of the valve core 2 and the head end surface of the elastic force adjusting screw 6.
Will the utility model relates to a slide bar quick-open type relief valve individual part assembly accomplishes the back, through flange mounting on corresponding pressure vessel or response device, loosens nut 7, twists through terminal interface and moves 6 adjusting spring pretightning forces of elasticity adjusting screw, makes the opening pressure of valve reach required pressure. The nut 7 is then tightened to secure the spring force adjusting screw 6.
When the pressure in the container exceeds the required pressure, the fluid enters the cylindrical channel through the water inlet pipe 10 and pushes the small piston 11 to drive the valve core 2 to compress the spring 3 and slide to the right in the cylindrical piston cavity with the smaller diameter at one side of the cylindrical bin I9. The sealing piston 12 and the long piston 13 slide along with the sliding, the long piston 13 is separated from the cylindrical channel part between the first cylindrical bin 9 and the second cylindrical bin 8, the first cylindrical bin 9 is communicated with the second cylindrical bin 8, and the valve is opened. The fluid flows out of the container through the water inlet pipe, the first cylindrical bin 9, the second cylindrical bin 8 and the water outlet pipe in sequence.
When the pressure in the container is reduced to the allowable pressure, the spring 3 has larger thrust than the fluid to the small piston 11 due to the reduction of the pressure of the fluid in the container, and pushes the valve core to move leftwards to close the valve.
Since the liquid thrust of the fluid acting on the small piston 11 through the catheter 10 during the opening and closing of the valve is compared with the elastic force of the spring 3, the pressure and stress formula is as follows: power is the pressure x area, and the lifting surface area of little piston 11 is little, consequently overcomes the thrust of spring and just needs great liquid pressure, and is same, when liquid pressure is certain, has reduced lifting surface area through little piston, so required spring thrust just diminishes, thereby realizes the utility model discloses the purpose of the relief valve of pressure is opened greatly to the spring control that uses less elasticity coefficient, and spring elasticity coefficient is little, installs more easily.
Claims (1)
1. A slide bar quick-opening safety valve is characterized by comprising a shell (1), a valve core (2), a spring (3), a rear cover (4), a screw (5), an elastic force adjusting screw (6) and a nut (7);
the shell (1) is characterized in that the main body is of a hollow shell structure, a first cylindrical bin (9) and a second cylindrical bin (8) are arranged inside the shell, the first cylindrical bin (9) and the second cylindrical bin (8) are respectively connected with two flanges through pipelines, a pipeline corresponding to a flange at the bottom is a water inlet pipe, a pipeline corresponding to a flange at the top is a water outlet pipe, a cylindrical channel is transversely arranged between the first cylindrical bin (9) and the second cylindrical bin (8) and is perpendicular to the first cylindrical bin (9) and the second cylindrical bin (8), a cylindrical piston cavity with a smaller diameter is arranged at the end part of the cylindrical channel on one side of the first cylindrical bin (9), and the tail end of the cylindrical piston cavity is communicated with the water inlet pipe through a liquid guide pipe (10); one side of the cylindrical channel on the second cylindrical bin (8) is open, and the end part of the cylindrical channel is provided with a flange with a threaded hole;
the valve core (2) is of a stepped shaft structure with three pistons, the three pistons are a small piston (11), a sealing piston (12) and a long piston (13) in sequence, and the small piston (11), the sealing piston (12) and the long piston (13) are connected together through a thinner shaft; the outer diameter of the small piston (11) is the same as the inner diameter of a cylindrical piston cavity arranged at the end part of the cylindrical channel at one side of the cylindrical bin I (9), and the small piston (11) is assembled in the cylindrical piston cavity and can slide left and right along the cylindrical piston cavity; the outer diameters of the sealing piston (12) and the long piston (13) are the same as the inner diameter of a cylindrical channel transversely arranged between the cylindrical bin I (9) and the cylindrical bin II (8), and the sealing piston (12) and the long piston (13) are both of hollow structures, are assembled in the cylindrical channel and can slide left and right along the cylindrical channel;
the main body of the rear cover (4) is of a cylindrical shell structure, one end of the rear cover is provided with a four-hole flange matched with a tail end flange of a cylindrical channel of the shell (1), and the rear cover (4) is fixedly assembled on the shell (1) through screws (5); an oval opening is formed in the side of the cylindrical wall of the rear cover (4); the tail end of the rear cover (4) is provided with a threaded interface;
the main body of the elastic adjusting screw rod (6) is of a stepped shaft structure, the head part of the elastic adjusting screw rod is a flat cylindrical table of which the outer diameter is slightly smaller than the inner diameter of a cylindrical inner cavity of the rear cover, the rear part of the elastic adjusting screw rod is a slender shaft with threads, a torque transmission interface formed by two planes is arranged at the end part of each thread, the elastic adjusting screw rod (6) is arranged in the rear cover (4), and the tail part of the elastic adjusting screw rod is matched with the rear cover (4); the nut (7) is matched with the slender shaft with threads of the elastic adjusting screw (6) and forms an extrusion force fixing elastic adjusting screw (6) with the outer side end face of the rear cover (4);
the spring (3) is arranged in a cylindrical space formed by the valve core (2), the shell (1) and the rear cover (4), and two ends of the spring are respectively pressed on the tail part of the valve core (2) and the head end face of the elastic force adjusting screw rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920625743.6U CN210240689U (en) | 2019-05-05 | 2019-05-05 | Slide bar quick-opening safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920625743.6U CN210240689U (en) | 2019-05-05 | 2019-05-05 | Slide bar quick-opening safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210240689U true CN210240689U (en) | 2020-04-03 |
Family
ID=69969538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920625743.6U Expired - Fee Related CN210240689U (en) | 2019-05-05 | 2019-05-05 | Slide bar quick-opening safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210240689U (en) |
-
2019
- 2019-05-05 CN CN201920625743.6U patent/CN210240689U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 Termination date: 20210505 |