CN214466442U - Pressure self-tightening sealing structure of swing check valve - Google Patents
Pressure self-tightening sealing structure of swing check valve Download PDFInfo
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- CN214466442U CN214466442U CN202120576207.9U CN202120576207U CN214466442U CN 214466442 U CN214466442 U CN 214466442U CN 202120576207 U CN202120576207 U CN 202120576207U CN 214466442 U CN214466442 U CN 214466442U
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Abstract
The utility model discloses a pressure self-tightening type seal structure of swing check valve, include the valve gap with valve body top confined, be formed with the wedge seal groove between valve gap upper portion edge and valve body inner wall, be provided with the sealing washer of matching in the wedge seal groove, the top of sealing washer is provided with the clamping ring, the top of clamping ring is provided with the ring of four-way opening, the valve body inner wall is provided with the mounting groove that matches with the ring of four-way opening, ring of four-way opening side inlays and establishes in the mounting groove, ring of four-way opening's top is provided with the apron, be provided with the double-screw bolt in the apron, the double-screw bolt runs through the cover connection is to the valve gap. The utility model discloses form wedge seal groove between valve gap and valve body to seal through the wedge sealing washer that sets up the matching, when pressure increases, promote the valve gap and move upward, valve gap extrusion sealing washer because the valve gap is the inclined plane contact with the sealing washer, pressure makes the sealing washer inseparabler with valve gap and valve body contact, and pressure is higher, and sealing performance is better.
Description
Technical Field
The utility model relates to a valve body seal structure especially relates to a pressure self-tightening type seal structure of swing check valve.
Background
The swing check valve generally adopts a middle flange sealing structure, a middle flange flat gasket is adopted as a sealing element in the structure, and the sealing performance is good under the working condition of middle and low pressure. However, under the high-pressure working condition, in order to ensure the sealing of the middle flange, the gasket of the middle flange needs to be widened, so that the middle flange of the valve is enlarged, the whole size of the valve is enlarged, and the whole weight is heavy. For the valve with the nominal pressure exceeding 2500Lb, the sealing structure of the middle flange is adopted, and even if the width of the gasket is increased, the sealing at the middle flange is difficult to ensure. Therefore, it is necessary to design a sealing structure suitable for a swing check valve with high pressure (nominal pressure > 10 MPa).
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a pressure self-tightening type seal structure of swing check valve is applicable to the swing check valve of high-pressure operating mode.
The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts provides a pressure self-clinching formula seal structure of swing check valve, include with valve body top confined valve gap, be formed with the wedge seal groove between valve gap upper portion edge and valve body inner wall, be provided with the sealing washer of matching in the wedge seal groove, the top of sealing washer is provided with the clamping ring, clamping ring upper surface and valve gap upper surface parallel and level, the top of clamping ring is provided with the ring of four-way opening, the valve body inner wall is provided with the mounting groove that matches with the ring of four-way opening, the ring of four-way opening is inlayed from the side and is established in the mounting groove, the top of ring of four-way opening is provided with the apron, be provided with the double-screw bolt in the apron, the double-screw bolt runs through the cover connection is to the valve gap.
Further, the valve gap is wholly a cylinder, valve gap bottom diameter is greater than the top diameter, the middle part of valve gap connection bottom and top is the round platform shape, valve gap bottom diameter matches with valve body top internal diameter, when the valve gap sets up in the valve body, form wedge seal groove between valve gap upper portion and the valve body inner wall.
Further, the sealing ring is annular, the outer diameter of the sealing ring is matched with the diameter of the bottom of the valve cover, the inner diameter of the sealing ring is matched with the diameter of the top of the valve cover, and the inner wall of the lower portion of the sealing ring is in a circular truncated cone shape matched with the middle of the valve cover.
Further, the clamping ring is annular, the outer diameter of the clamping ring is matched with the outer diameter of the bottom of the valve cover, and the inner diameter of the clamping ring is matched with the outer diameter of the top of the valve cover.
Further, the four-open ring is the arc piece that is divided into four postprocessing by a whole ring and forms, the external diameter of four-open ring is greater than valve gap bottom external diameter, the internal diameter of four-open ring slightly is greater than the top external diameter of valve gap and is less than the bottom external diameter of valve gap.
Further, the height of mounting groove and the high matching of four ring-opening, the internal diameter of mounting groove and the external diameter of four ring-opening match, four ring-opening are two and relative setting in the mounting groove, and will sealing washer and clamping ring location.
Furthermore, the bottom surface of the cover plate is provided with a positioning groove matched with the four open rings.
Further, the valve gap top surface is provided with the internal thread hole that matches with the double-screw bolt, be provided with the stud hole that link up on the apron, the stud hole corresponds the setting with the internal thread hole of valve gap, the double-screw bolt passes the stud hole passes through internal thread jogged joint with the valve gap.
Furthermore, a through dismounting hole is formed in the side wall of the valve cover corresponding to the mounting groove.
Further, the sealing ring is made of flexible graphite and stainless steel wires.
The utility model discloses contrast prior art has following beneficial effect: the utility model provides a pressure self-tightening type sealing structure of a swing check valve, a wedge-shaped sealing groove is formed between a valve cover and a valve body, and the valve cover and the valve body are sealed by setting a matched wedge-shaped sealing ring, when the pressure is increased, the valve cover is pushed to move upwards, the valve cover extrudes the sealing ring, and because the valve cover and the sealing ring are in inclined plane contact, the pressure makes the sealing ring more closely contact with the valve cover and the valve body, the higher the pressure is, the better the sealing performance is; the upper part of the sealing ring is positioned in an embedded mode through the compression ring and the side face of the four-open ring, the top of the four-open ring is locked to the valve cover through the cover plate and the stud, the structure is compact, the size is small, the weight is light, materials are saved, the cost is low, and the four-open ring is very suitable for limited installation space of a thermal power generating unit and a nuclear power generating unit.
Drawings
Fig. 1 is a schematic view illustrating a pressure self-tightening sealing structure of a swing check valve according to an embodiment of the present invention installed in a valve body;
FIG. 2 is an exploded view of a pressure self-tightening seal structure of a swing check valve in an embodiment of the present invention;
fig. 3 is a schematic structural view of a swing check valve with a self-tightening sealing structure according to an embodiment of the present invention.
In the figure:
1. a valve body; 7. a stud; 8. a cover plate; 9. a valve cover; 10. opening a ring; 11. a pressure ring 12 and a sealing ring; 101. and (6) disassembling the hole.
Detailed Description
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic view of the pressure self-tightening sealing structure of the swing check valve installed in the valve body according to the embodiment of the present invention.
Please refer to fig. 1, the embodiment of the present invention provides a pressure self-tightening sealing structure of a swing check valve, including a valve cover 9 sealing the top of a valve body 1, a wedge-shaped sealing groove is formed between the upper edge of the valve cover 9 and the inner wall of the valve body 1, a matching sealing ring 12 is arranged in the wedge-shaped sealing groove, a pressing ring 11 is arranged above the sealing ring 12, the upper surface of the pressing ring 11 is flush with the upper surface of the valve cover 9, a four-open ring 10 is arranged above the pressing ring 11, the inner wall of the valve body 1 is provided with a mounting groove matching with the four-open ring 10, the four-open ring 10 is embedded in the mounting groove from the side, a cover plate 8 is arranged above the four-open ring 10, a stud 7 is arranged in the cover plate 8, and the stud 7 runs through the cover plate 8 and is connected to the valve cover 9.
Please refer to fig. 2 simultaneously, the embodiment of the utility model provides a pressure self-tightening type seal structure of swing check valve, valve gap 9 wholly are the cylinder, valve gap 9 bottom diameter is greater than the top diameter, the middle part that valve gap 9 connects bottom and top is the round platform shape, valve gap 9 bottom diameter matches with 1 top internal diameter of valve body, when valve gap 9 sets up in valve body 1, form the wedge seal groove between valve gap 9 upper portion and 1 inner wall of valve body.
Specifically, the sealing ring 12 is annular, the outer diameter of the sealing ring 12 is matched with the diameter of the bottom of the valve cover 9, the inner diameter of the sealing ring 12 is matched with the diameter of the top of the valve cover 9, and the inner wall of the lower portion of the sealing ring 12 is in a circular truncated cone shape matched with the middle of the valve cover 9. The seal ring 12 is made of flexible graphite and stainless steel wire. The valve cover 9 is matched with the wedge-shaped sealing ring 12 in angle, when the pressure is increased, the valve cover 9 is pushed to move upwards, the valve cover 9 extrudes the sealing ring 12, and the valve cover 9 is in inclined surface contact with the sealing ring 12, so that the sealing ring 12 is in closer contact with the valve cover 9 and the valve body 1 under the pressure, and the sealing performance is better as the pressure is higher.
Specifically, the pressing ring 11 is annular, the outer diameter of the pressing ring 11 is matched with the outer diameter of the bottom of the valve cover 9, and the inner diameter of the pressing ring 11 is matched with the outer diameter of the top of the valve cover 9; the four-open ring 10 is an arc-shaped block which is formed by four parts of post processing through a whole ring, the outer diameter of the four-open ring 10 is larger than the outer diameter of the bottom of the valve cover 9, and the inner diameter of the four-open ring 10 is slightly larger than the outer diameter of the top of the valve cover 9 and smaller than the outer diameter of the bottom of the valve cover 9. The height of mounting groove and the high matching of ring 10 open, the internal diameter of mounting groove matches with ring 10 open's external diameter, ring 10 open is two and sets up in the mounting groove relatively, and will sealing washer 12 and clamping ring 11 location. The four-open ring 10 and the compression ring 11 can be locked by correspondingly arranged mounting hole screws. The bottom surface of the compression ring 11 is completely attached to the sealing ring 12, the side surfaces of the four-open ring 10 are embedded and positioned, the top of the four-open ring 10 is locked to the valve cover 9 through the cover plate 8 and the stud 7, the structure is compact, and locking is firm.
Preferably, the side wall of the bonnet 9 is provided with a through-going removal hole 101 in correspondence of the mounting slot. When the valve needs to be disassembled for maintenance or the sealing ring 12 is replaced, the four-open ring 10 can be easily disassembled through the disassembling hole 101, and the problem that the four-open ring 10 is difficult to disassemble due to occlusion with the valve body 1 under the action of medium pressure is avoided.
Preferably, the bottom surface of the cover plate 8 is provided with a positioning groove matched with the four-open ring 10, so that the four-open ring 10 is positioned and the displacement of the four-open ring 10 is avoided.
Specifically, the top surface of the valve cover 9 is provided with an internal thread hole matched with the stud 7, a through stud hole is formed in the cover plate 8, the stud hole corresponds to the internal thread hole of the valve cover 9, and the stud 7 penetrates through the internal thread hole and the valve cover 9.
Please refer to fig. 3 simultaneously, the utility model discloses swing check valve's pressure self-tightening seal structure of embodiment reserves the wedge seal groove between valve gap 9 and valve body 1 to seal the seal groove through setting up the wedge sealing washer 12 that matches, when pressure increases, promotes valve gap 9 and moves up, valve gap 9 extrusion seal 12, because valve gap 9 and sealing washer 12 are the inclined plane contact, pressure makes sealing washer 12 and valve gap 9 and valve body 1 contact inseparabler, pressure is higher, sealing performance is better.
To sum up, the embodiment of the present invention provides a pressure self-tightening sealing structure of a swing check valve, wherein a wedge-shaped sealing groove is formed between a valve cover 9 and a valve body 1, and the wedge-shaped sealing ring 12 is arranged for sealing, when the pressure is increased, the valve cover 9 is pushed to move upwards, the valve cover 9 extrudes the sealing ring 12, because the valve cover 9 and the sealing ring 12 are in inclined surface contact, the pressure makes the sealing ring 12 contact with the valve cover 9 and the valve body 1 more tightly, and the higher the pressure is, the better the sealing performance is; the upper part of the sealing ring 12 is positioned in an embedded mode through the side face of the pressing ring 11 and the four-open ring 10, the top of the four-open ring 10 is locked to the valve cover 9 through the cover plate 8 and the stud 7, the structure is compact, the size is small, the weight is light, materials are saved, the cost is low, and the four-open ring is very suitable for limited installation space of thermal power units and nuclear power units.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a pressure self-clinching formula seal structure of swing check valve, a serial communication port, include the valve gap with valve body top confined, be formed with the wedge seal groove between valve gap upper portion edge and the valve body inner wall, be provided with the sealing washer of matching in the wedge seal groove, the top of sealing washer is provided with the clamping ring, clamping ring upper surface and valve gap upper surface parallel and level, the top of clamping ring is provided with the ring of four-opening, the valve body inner wall is provided with the mounting groove that matches with the ring of four-opening, the ring of four-opening edgewise inlays to be established in the mounting groove, the top of ring of four-opening is provided with the apron, be provided with the double-screw bolt in the apron, the double-screw bolt runs through the cover connection is to the valve gap.
2. The pressure self-tightening type sealing structure of the swing check valve according to claim 1, wherein the valve cover is a cylinder as a whole, the diameter of the bottom of the valve cover is larger than that of the top of the valve cover, the middle part of the valve cover connecting the bottom and the top is a circular truncated cone, the diameter of the bottom of the valve cover is matched with the inner diameter of the top of the valve body, and when the valve cover is arranged in the valve body, a wedge-shaped sealing groove is formed between the upper part of the valve cover and the inner wall of the valve body.
3. The pressure self-tightening type sealing structure of the swing check valve according to claim 2, wherein the sealing ring has a ring shape, an outer diameter of the sealing ring is matched with a diameter of the bottom of the valve cover, an inner diameter of the sealing ring is matched with a diameter of the top of the valve cover, and an inner wall of the lower portion of the sealing ring has a circular truncated cone shape matched with the middle of the valve cover.
4. The pressure self-tightening type seal structure of the swing check valve according to claim 2, wherein the pressing ring has a ring shape, an outer diameter of the pressing ring is matched with an outer diameter of a bottom of the valve cover, and an inner diameter of the pressing ring is matched with an outer diameter of a top of the valve cover.
5. The pressure self-tightening type sealing structure of the swing check valve according to claim 2, wherein the four open rings are arc-shaped blocks which are formed by dividing a whole ring into four parts and then processing the four open rings, the outer diameter of the four open rings is larger than the outer diameter of the bottom of the valve cover, and the inner diameter of the four open rings is slightly larger than the outer diameter of the top of the valve cover and smaller than the outer diameter of the bottom of the valve cover.
6. The pressure self-tightening type sealing structure of the swing check valve according to claim 5, wherein the height of the mounting groove is matched with the height of a four-open ring, the inner diameter of the mounting groove is matched with the outer diameter of the four-open ring, the four-open ring is provided in two and oppositely in the mounting groove, and the sealing ring and the pressing ring are positioned.
7. The pressure self-tightening type sealing structure of a swing check valve according to claim 1, wherein the bottom surface of the cap plate is provided with a positioning groove matching with the four open rings.
8. The pressure self-tightening type sealing structure of the swing check valve according to claim 1, wherein the top surface of the valve cover is provided with an internal threaded hole matched with a stud, the cover plate is provided with a through stud hole, the stud hole is arranged corresponding to the internal threaded hole of the valve cover, and the stud passes through the stud hole and is connected with the valve cover through the internal threaded hole.
9. The pressure self-tightening structure of a swing check valve according to claim 1, wherein the side wall of the cap is provided with a through-hole at a position corresponding to the mounting groove.
10. The pressure self-tightening sealing structure of a swing check valve according to claim 1, wherein the sealing ring is made of flexible graphite and stainless steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120576207.9U CN214466442U (en) | 2021-03-22 | 2021-03-22 | Pressure self-tightening sealing structure of swing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120576207.9U CN214466442U (en) | 2021-03-22 | 2021-03-22 | Pressure self-tightening sealing structure of swing check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214466442U true CN214466442U (en) | 2021-10-22 |
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ID=78157008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120576207.9U Active CN214466442U (en) | 2021-03-22 | 2021-03-22 | Pressure self-tightening sealing structure of swing check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214466442U (en) |
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2021
- 2021-03-22 CN CN202120576207.9U patent/CN214466442U/en active Active
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