CN213017926U - Pressure release valve - Google Patents
Pressure release valve Download PDFInfo
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- CN213017926U CN213017926U CN202021627999.XU CN202021627999U CN213017926U CN 213017926 U CN213017926 U CN 213017926U CN 202021627999 U CN202021627999 U CN 202021627999U CN 213017926 U CN213017926 U CN 213017926U
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- pressure relief
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Abstract
The utility model relates to a pressure release valve, including valve body, valve gap, valve rod and suit be in coil spring on the valve rod, the bottom of valve body is equipped with the medium import, be equipped with the pressure release mouth on the lateral wall of valve body, the bottom of valve pocket is equipped with the disk seat, its medium passage with the medium import intercommunication, the fixed valve clack that is equipped with the tube-shape in bottom of valve rod, the valve clack internal fixation is equipped with the rubber pad, the rubber pad compresses tightly on the disk seat, coil spring's top is supported on the valve gap, the bottom is supported on the valve gap, the top of valve rod articulates there is the twist grip, and its articulated portion compresses tightly on the roof of valve gap, articulated portion be the cam form or articulated portion with articulated shaft is eccentric articulated. The utility model discloses both can open automatically, also can manually open, application scope is wide, and the scope of stepping up that can adapt to the medium is big to can carry out quick pressure release when the pressure of medium surpasss the great scope of specified value, the security is high.
Description
Technical Field
The utility model relates to a pressure relief valve belongs to the valve field.
Background
Pressure relief valves are usually installed on pressure pipes or equipment, so that when the pressure of a medium in the pipe or equipment rises to exceed a specified value, the pressure relief valves can discharge the medium to the outside of the system to prevent the pressure in the pipe or equipment from exceeding the specified value, and the operation safety of the system is ensured. Pressure release valve mainly divide into spring and two kinds of lever, and wherein spring pressure release valve uses comparatively extensively, and traditional spring pressure release valve adopts automatic mode of opening usually, and when the medium pressure rise in pipeline or the equipment exceeded the specified value promptly, the medium promoted the valve clack and upwards opened and carry out the pressure release, and the decrement increase of spring this moment is used in spring thrust on the valve clack and also follows the increase, is unfavorable for opening rapidly of valve clack and the quick pressure release of system, has the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
For overcoming the above defect of prior art, the utility model provides a pressure release valve, it both can open automatically, also can manually open, can the quick pressure release, and the security is high.
The utility model discloses realize above-mentioned purpose's technical scheme is: a pressure release valve comprises a valve body and a valve rod matched with the valve body, wherein the top of the valve body is provided with a valve cover, the valve rod is sleeved with a spiral spring, the bottom end of the valve body is provided with a medium inlet communicated with the valve cavity, the side wall of the valve body is provided with a pressure relief opening communicated with the valve cavity, the bottom end of the valve cavity is provided with a valve seat, the medium channel of the valve seat is communicated with the medium inlet, the bottom end of the valve rod is provided with a valve clack, the bottom surface of the valve clack is provided with a rubber pad which is used for forming a valve sealing pair with the valve seat, the spiral spring is positioned in the valve body, the top end of the valve rod is propped against the valve cover, the bottom end of the spiral spring is propped against the valve clack, the upper part of the valve rod penetrates through the valve cover, the top end of the valve cover is hinged with a rotating handle through a horizontal hinge shaft, a hinged part of the rotating handle is pressed on the top wall of the valve cover, and the hinged part is in a cam shape or is eccentrically hinged with the hinge shaft.
Preferably, the valve clack comprises a narrow diameter section located at the upper part and a wide diameter section located at the lower part, the narrow diameter section is fixedly connected with the bottom end of the valve rod, the inner diameter of the wide diameter section is larger than the outer diameter of the top end of the valve seat, the rubber pad is installed in the wide diameter section, and the bottom end of the spiral spring abuts against the top wall of the wide diameter section.
Preferably, the top outer wall of the valve seat is a conical surface with a gradually reduced inner diameter from bottom to top.
Preferably, the pressure relief valve further comprises a columnar connecting seat, the connecting seat is fixedly connected to the bottom end of the valve rod, the outer diameter of the connecting seat is smaller than the inner diameter of the valve seat, the narrow-diameter section is fixedly sleeved on the upper portion of the connecting seat, the rubber pad is annular, and the rubber pad is radially embedded between the wide-diameter section and the connecting seat.
Preferably, the outer wall of the bottom of the connecting seat is provided with a radially inward annular groove, the annular groove corresponds to the radial position of the wide-diameter section, and the inner edge of the rubber pad is embedded in the annular groove.
Preferably, a rotating handle base is arranged on the top surface of the valve cover, a through hole is formed in the center of the rotating handle base, the top end of the valve rod penetrates through the through hole upwards, and the hinged portion of the rotating handle is pressed on the rotating handle base.
Preferably, annular PTFE gaskets are arranged between the top end of the spiral spring and the valve cover and between the bottom end of the spiral spring and the valve clack.
Preferably, the valve cover is in threaded connection with the valve body.
Preferably, an O-shaped sealing ring is arranged between the valve cover and the valve body.
Preferably, an O-shaped sealing ring is arranged between the valve rod and the valve rod hole of the valve cover.
The utility model has the advantages that: the utility model can be opened automatically or manually, when the medium pressure exceeds the specified value (the opening pressure of the pressure relief valve, the same below), the medium pressure can be opened automatically, at the moment, under the action of the medium pressure, the rubber pad is deformed upwards, even the valve rod is lifted upwards slightly, a small gap is formed between the rubber pad and the valve seat, the medium enters the valve cavity from the small gap and is discharged through the pressure relief port, and the pressure relief is carried out; when the medium pressure exceeds a specified value and is larger or according to other requirements, a manual opening mode can be adopted to rotate the rotating handle, so that the outer wall of a hinged part (when the hinged part is in a cam shape, a convex point or a flange of a cam) of the rotating handle, which is far away from the hinged shaft, is abutted against the base of the rotating handle, the valve rod is lifted upwards, the connecting seat, the valve clack and the rubber pad are driven to be lifted upwards simultaneously, a larger gap is formed between the rubber pad and the valve seat, and a medium rapidly enters the valve cavity from the larger gap and is discharged through the pressure relief opening to rapidly relieve the pressure. The utility model discloses a two kinds of opening mode make its application scope wide, can adapt to the scope of stepping up of medium big to can carry out quick pressure release, the security is high when the pressure of medium surpasss the great scope of specified value.
Drawings
Fig. 1 is a schematic sectional structure diagram of the present invention.
Detailed Description
Referring to fig. 1, the utility model discloses a pressure release valve, which comprises a valve body 1, a valve cover 2, a valve rod 3 and a spiral spring 4 sleeved on the valve rod, wherein a valve cavity is arranged in the valve body, a medium inlet 5 communicated with the valve cavity is arranged at the bottom end of the valve body, the medium inlet is preferably vertically arranged and is used for connecting pipelines or equipment, external threads are usually arranged on the outer wall of the valve body, a pressure relief port 6 communicated with the valve cavity is arranged on the side wall of the valve body, the pressure relief port is preferably horizontally arranged and is used for pressure relief, internal threads are usually arranged on the inner wall of the pressure relief port and is convenient for connecting a discharge pipe of a pressure relief medium, a valve seat 7 is arranged at the bottom end of the valve cavity, the valve seat is fixedly connected with the inner wall of the valve body or is in an integrated structure with the valve body, the valve seat in the integrated structure can be formed on a corresponding valve, the medium channel (central through hole) of the valve seat is vertical and coaxial and communicated with the medium inlet, the valve clack 8 is installed at the bottom end of the valve rod, a rubber pad 9 is fixedly arranged in the valve clack, the valve rod is pressed downwards by a spring under a normal state, and the rubber pad is tightly pressed on the top wall of the valve seat (namely the top wall of the outlet of the medium channel) to form a sealing pair.
The top end of the coil spring is abutted against the valve cover, the bottom end of the coil spring is abutted against the valve clack, the coil spring is normally in a compressed state under normal state, so that the rubber pad is pressed on the top surface of the valve seat (the sealing matching surface of the valve seat) through the valve rod under the thrust action of the coil spring, the top end of the valve rod is hinged with a rotating handle 11 through a horizontal hinge shaft (such as a pin) 10, the hinge part of the rotating handle is in a cam shape or is eccentrically hinged with the hinge shaft, and under normal state, the outer wall of the hinge part of the rotating handle, which is closer to the hinge shaft, is abutted against the top wall of the valve cover.
The valve clack is preferable including being located the narrow diameter section on upper portion and being located the wide diameter section of lower part, the narrow diameter section with the coaxial fixed connection in bottom of valve rod, the internal diameter of wide diameter section is greater than the top external diameter of disk seat, the rubber pad is installed in the wide diameter section and is filled the inner space of wide diameter section, so that the rubber pad can seal completely the medium passageway export of disk seat, and when the rubber pad produced deformation, for the medium from the medium import to the valve intracavity circulation leaves the space that forms the circulation passageway, coil spring's bottom is supported on the roof of wide diameter section.
The top outer wall of the valve seat is preferably a conical surface with a gradually reduced inner diameter from bottom to top, the top wall thickness of the valve seat is relatively small, so that under the thrust action of the spiral spring, the contact part of the rubber pad and the top wall of the valve seat is inwards sunken, the rubber pad covers the top wall (a narrow annular surface) of the valve seat, and the sealing effect is guaranteed.
The pressure release valve also preferably comprises a columnar connecting seat 12, the connecting seat is coaxial with the valve rod (the axes are positioned on the same straight line), a valve rod connecting blind hole is arranged on the top surface of the connecting seat, the lower end of the valve rod is inserted into the valve rod connecting blind hole and is in interference fit with the hole wall of the valve rod connecting blind hole to fix the valve rod and the valve rod, the valve clack is sleeved on the connecting seat, the bottom surface of the connecting seat and the bottom surface of the valve clack are positioned in the same horizontal plane or the bottom surface of the connecting seat is lower than the bottom surface of the valve clack, the rubber pad is annular and is radially embedded between the wide-diameter section and the connecting seat, and by arranging the connecting seat, the connecting seat utilizes the relatively larger outer diameter of the connecting seat and the longer axial contact distance between the connecting seat and the valve clack, so that, the valve clack and the rubber pad are guaranteed to be stable and not to incline, the sealing force and the sealing effect between the rubber pad and the sealing surface of the valve seat are guaranteed to be consistent, leakage caused by the inclination of the valve clack is avoided, the outer diameter value of the connecting seat and the axial contact length between the outer diameter and the valve clack (the inner diameter of the narrow-diameter section) can be determined according to needs, and the fact that the valve clack is not influenced by the possible inclination amount of the valve clack when the assembling requirement is met is guaranteed under certain processing precision.
The outer wall of the bottom of the connecting seat is preferably provided with a radial inward annular groove, the annular groove corresponds to the radial position of the wide-diameter section, and the inner edge of the rubber pad is embedded in the annular groove, so that the rubber pad is convenient to fix.
The utility model discloses during the application, install it on pipeline under pressure or pressure equipment through the medium import, both can open automatically, also can manually open, when medium pressure surpassed the specified value (the opening pressure of pressure release valve, lower with) the scope less, can adopt the automatic mode of opening, at this moment under the effect of medium pressure, the rubber pad produces ascending deformation, even makes the valve rod lift slightly upwards, makes rubber pad and valve seat between form the tiny clearance, medium in the medium import gets into the valve pocket from the tiny clearance rethread the pressure release mouth discharges, carries out the pressure release; when the medium pressure exceeds the specified value and is in a large range, the automatic opening mode cannot meet the requirement of rapid pressure relief, a manual opening mode can be adopted, the rotating handle is rotated, the outer wall of a hinged part of the rotating handle, which is far away from the hinged shaft, is abutted against the top wall of the valve cover (when the hinged part is in a cam shape, a convex point or a flange of a cam is formed), so that the valve rod is lifted upwards, the connecting seat, the valve clack and the rubber pad are driven to be lifted upwards simultaneously, a large gap is formed between the rubber pad and the valve seat, a medium rapidly enters the valve cavity from the large gap and is discharged through the pressure relief opening, rapid pressure relief is carried out, and after the rapid pressure relief is finished, the rotating handle is turned back, and the sealing between the rubber pad and the valve seat is restored. When the pressure relief valve is used for a long time, so that foreign matters are clamped at a sealing part between the rubber pad and the top wall of the valve seat to influence the sealing effect, the rotating handle can be rotated (once or for multiple times), a large gap is formed between the rubber pad and the valve seat, and the foreign matters are discharged through the flowing of a medium.
The valve comprises a valve body, a valve cover, a rotating handle base 13 and a rotating handle base, wherein the rotating handle base is in a plate shape, a gap is reserved between the rotating handle base and the valve cover, the valve cover is not required to be supported, a rabbet (an annular notch) for embedding the rotating handle base is formed in the inner side wall of a top opening of the valve body, a through hole is formed in the center of the rotating handle base, the top end of a valve rod penetrates through the through hole upwards, a hinged portion of the rotating handle is tightly pressed on the rotating handle base, damage to a top wall of the valve cover or a matching thread between the valve cover and the valve body (a main body portion) due to frequent rotation of the rotating handle is avoided, the rotating handle base is independently arranged on the top surface of the valve cover, and when the rotating handle base is damaged due to frequent rotation of the rotating.
The top surface of the rotating handle base is provided with a wear-resisting plate which is used for contacting with the rotating handle.
The edge of the hinged part is provided with two stable areas which can be stably combined with the top surface of the rotating handle base, the stable areas are planar or cylindrical, the curvature radius of the stable areas is larger than the distance between the axis of the hinged shaft and the top surface of the rotating handle base when the stable areas are combined (in pressure contact) with the top surface of the rotating handle base, therefore, when the middle part of the stable areas at the edge of the hinged part is contacted with the top surface of the rotating handle base, the cylindrical surface of the stable areas is tangent to the top surface of the rotating handle base and is in a stable state, different distances are arranged between different stable areas and the hinged shaft, one stable area lifts the hinged shaft (and then the valve rod), a rubber pad of the valve clack is separated from the valve seat, the other stable area allows the valve rod to fall, and the rubber pad of the valve clack is sealed with the valve.
The bottom surface of the valve cover can be provided with an upward concave spring assembly groove, and the top end of the spiral spring is inserted into the spring assembly groove, so that the spiral spring is convenient to fix. Annular PTFE gaskets 14 are arranged between the top end of the spiral spring and the valve cover (the top wall of the spring assembling groove) and between the bottom end of the spiral spring and the valve clack (the top wall of the wide-diameter section) so as to improve the wear resistance of the contact part.
The valve cover is connected with the valve body through preferred threads, so that the valve cover is convenient to disassemble, assemble and repair and replace internal parts of the valve body.
O-shaped sealing rings 15 are preferably arranged between the valve cover and the valve body and between the valve rod and the valve rod hole of the valve cover, so that the sealing effect is improved.
A nameplate can be arranged on the top surface of the valve cover and is positioned between the rotating handle base and the valve cover.
Claims (10)
1. A pressure release valve comprises a valve body and a valve rod matched with the valve body, wherein a valve cover is arranged at the top of the valve body, a spiral spring is sleeved on the valve rod, a medium inlet communicated with a valve cavity is arranged at the bottom end of the valve body, a pressure relief opening communicated with the valve cavity is arranged on the side wall of the valve body, the pressure release valve is characterized in that a valve seat is arranged at the bottom end of the valve cavity, a medium passage of the valve seat is communicated with the medium inlet, a valve clack is arranged at the bottom end of the valve rod, a rubber pad used for forming a valve sealing pair with the valve seat is arranged at the bottom surface of the valve clack, the spiral spring is positioned in the valve body, the top end of the spiral spring is abutted against the valve cover, the bottom end of the spiral spring is abutted against the valve clack, the upper part of the valve rod penetrates through the valve, the hinge part is in a cam shape or is eccentrically hinged with the hinge shaft.
2. The pressure relief valve of claim 1 wherein said valve flap includes an upper narrow diameter section and a lower wide diameter section, said narrow diameter section being fixedly attached to said bottom end of said valve stem, said wide diameter section having an inner diameter greater than an outer diameter of a top end of said valve seat, said rubber gasket being mounted within said wide diameter section, a bottom end of said coil spring abutting a top wall of said wide diameter section.
3. The pressure relief valve as defined in claim 2 wherein the top outer wall of said valve seat is tapered from bottom to top with an inner diameter that tapers.
4. The pressure relief valve according to claim 3, further comprising a cylindrical connecting seat fixedly connected to a bottom end of the valve stem, wherein an outer diameter of the connecting seat is smaller than an inner diameter of the valve seat, the narrow diameter section is fixedly sleeved on an upper portion of the connecting seat, and the rubber pad is annular and radially embedded between the wide diameter section and the connecting seat.
5. The pressure relief valve according to claim 4, wherein the bottom outer wall of the connecting seat is provided with a radially inward annular groove corresponding to a radial position of the wide diameter section, and an inner edge of the rubber pad is fitted in the annular groove.
6. The pressure relief valve as set forth in claim 5, wherein said valve cover has a rotating handle base provided on a top surface thereof with a through hole at a center thereof, a top end of said valve stem passing upwardly through said through hole, and a hinge portion of said rotating handle pressing against said rotating handle base.
7. The pressure relief valve as set forth in claim 6, wherein annular PTFE washers are disposed between the top end of said coil spring and said valve cover and between the bottom end of said coil spring and said valve flap.
8. The pressure relief valve as recited in claim 7 wherein said valve cover is threadably connected to said valve body.
9. The pressure relief valve as recited in claim 8 wherein an O-ring seal is disposed between said valve cover and said valve body.
10. The pressure relief valve as set forth in claim 9, wherein an O-ring seal is disposed between said stem and said stem bore of said bonnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021627999.XU CN213017926U (en) | 2020-08-07 | 2020-08-07 | Pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021627999.XU CN213017926U (en) | 2020-08-07 | 2020-08-07 | Pressure release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213017926U true CN213017926U (en) | 2021-04-20 |
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ID=75464184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021627999.XU Active CN213017926U (en) | 2020-08-07 | 2020-08-07 | Pressure release valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213017926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400478A (en) * | 2022-07-20 | 2022-11-29 | 中国核电工程有限公司 | A filter equipment for acquireing nuclear power plant's coolant impurity |
-
2020
- 2020-08-07 CN CN202021627999.XU patent/CN213017926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400478A (en) * | 2022-07-20 | 2022-11-29 | 中国核电工程有限公司 | A filter equipment for acquireing nuclear power plant's coolant impurity |
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