CN217898966U - Valve cover of rough pumping valve - Google Patents
Valve cover of rough pumping valve Download PDFInfo
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- CN217898966U CN217898966U CN202221999828.9U CN202221999828U CN217898966U CN 217898966 U CN217898966 U CN 217898966U CN 202221999828 U CN202221999828 U CN 202221999828U CN 217898966 U CN217898966 U CN 217898966U
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Abstract
The utility model provides a valve gap is taken out to thick that sealing performance is good. The valve cover of the rough pumping valve is characterized in that a circle of annular sealing groove is formed in the outer side wall of the cover body locally in a concave mode to contain a sealing ring, a plurality of thread through holes longitudinally penetrating through the cover body are formed between the annular sealing groove and the edge of the cover body in an area, a transverse opening hidden groove is formed in a local section between every two adjacent thread through holes in the edge above the annular sealing groove to contain a sealing strip, and a notch of the opening hidden groove is formed in the outer side wall of the cover body. Therefore, the sealing strip arranged in the opening hidden groove can seal the gap between the inner side wall of the concave table and the outer side wall of the valve cover corresponding to the small stress position, and the sealing performance is enhanced. In other words, the inventor finds a weak sealing area of the valve cover of the prior rough-drawing valve, and adds a sealing structure to the weak sealing area to prevent water seepage, so as to improve the sealing performance of the valve cover of the rough-drawing valve.
Description
Technical Field
The utility model belongs to the technical field of vacuum coating machine and specifically relates to a valve gap of rough exhaust valve of vacuum coating machine.
Background
The rough pumping valve is a valve between a first-stage pump (generally a rotary vane pump) and a second-stage pump of the vacuum coating machine, and can be opened when the pipeline pressure reaches the opening requirement of the second-stage pump. The valve cover has two functions, namely, the valve rod is positioned, and the normal transmission and the opening and closing of the valve rod are ensured. And the second is sealing function, which prevents the fluid in the valve from flowing out. The existing valve cover is provided with an annular sealing groove on the circumferential side wall, a sealing ring is arranged on the annular sealing groove, and a plurality of screw holes penetrating through the valve cover are formed in the top wall of the valve cover along the circumferential direction. The oral area of valve is taken out to the thick, and the screw has been seted up to diapire in the concave station, and the workman installs the valve gap in the concave station, thereby penetrates the screw of valve gap and the screw of concave station with the screw and locks the valve gap on the concave station of the oral area of valve is taken out to the thick, thereby the sealing washer on the cyclic annular seal groove of valve gap receives the sealed space between concave station inside wall and the valve gap lateral wall of the extrusion of concave station inside wall to make the valve gap possess sealed effect. However, stress applied to the valve cover by the screws is not uniform, the screw holes are closest to the screws, so that the stress is large, the middle points between the two screw holes in the circumferential direction are farthest away from the screws, so that the stress is small, the stress of the screws is small at the corresponding bottom of the valve cover, the bottom of the valve cover is not tightly sealed with the inner bottom wall of the concave table, water seepage easily occurs, and the leaked water is only sealed by one sealing ring, so that the sealing performance of the rough pumping valve cover is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a valve gap is taken out to thick that sealing performance is good.
The valve cover of the rough pumping valve is characterized in that a circle of annular sealing groove is formed in the outer side wall of the cover body locally in a concave mode to contain a sealing ring, a plurality of thread through holes longitudinally penetrating through the cover body are formed between the annular sealing groove and the edge of the cover body in an area, a transverse opening hidden groove is formed in a local section between every two adjacent thread through holes in the edge above the annular sealing groove to contain a sealing strip, and a notch of the opening hidden groove is formed in the outer side wall of the cover body.
Further, the lid includes top layer and bottom, and cyclic annular seal groove specifically lies in between top layer and the bottom, and the opening camera obscura specifically lies in the top layer, and the notch is specifically seted up at the lateral wall of top layer.
Further, the open troffer is arcuate to fit the shape of the partial segment.
Furthermore, a transverse opening bottom groove is formed in the bottom layer right below each opening hidden groove to accommodate the sealing strip, and the notch of each opening bottom groove faces downwards.
Further, the open bottom slot is arc-shaped to fit the shape of the partial section.
Furthermore, the threaded through holes are uniformly distributed along the periphery of the edge of the top wall of the cover body.
Furthermore, the cover body is disc-shaped, and a valve rod hole is formed in the circle center of the top layer and longitudinally penetrates through the cover body of the whole valve cover so that a valve rod can penetrate through the cover body.
Further, a plurality of screws are included, which are fitted into the plurality of threaded through holes, respectively.
Further, the seal ring comprises a longitudinal through hole, and a screw passes through the threaded through hole and the longitudinal through hole.
Has the advantages that: the middle point between the two threaded through holes in the circumferential direction is farthest away from the screw, so that the stress is small, and the bottom of the corresponding valve cover is subjected to the small stress of the screw, so that water is easy to seep between the bottom of the valve cover and the inner bottom wall of the concave platform. The utility model discloses set up horizontal opening camera obscura with the holding sealing strip at the local section of border between per two adjacent screw thread through-holes of cyclic annular seal groove top, the lateral wall at the lid is seted up to the notch of opening camera obscura. Therefore, the sealing strip arranged in the opening hidden groove can seal the gap between the inner side wall of the concave station corresponding to the small stress position and the outer side wall of the valve cover, and the sealing performance is enhanced. In other words, the inventor finds a weak sealing area of the valve cover of the prior rough-drawing valve, and adds a sealing structure to the weak sealing area to prevent water seepage, thereby improving the sealing performance of the valve cover of the rough-drawing valve.
Drawings
FIG. 1 is a top view of a roughing valve cover;
FIG. 2 is a bottom view of the roughing valve cover (with the bottom seal hidden);
FIG. 3 is a cross-sectional view of the roughing valve cover;
in the figure: 1. a valve cover; 2. a top layer; 3. a threaded through hole; 4. a valve stem bore; 6. a bottom layer; 7. an open bottom trough; 8. opening a hidden groove; 9. an annular seal groove; 10. a partial segment; 11. a bottom seal strip; 12. the edge of the cover body; 13. the edge of the cover body.
Detailed Description
The invention will be described in further detail with reference to the following detailed description.
As shown in fig. 3, the cover body of the valve cover 1 is disc-shaped and comprises a top layer 2 and a bottom layer 6, an annular sealing groove 9 is formed in the outer side wall between the top layer 2 and the bottom layer 6 of the valve cover 1 in a concave manner to accommodate a sealing ring, and the sealing ring is provided with a longitudinal through hole. The center of the top layer 2 is provided with a valve rod hole 4 which longitudinally penetrates through the cover body of the whole valve cover 1 so that a valve rod can pass through the valve rod, the edge of the top wall of the top layer 2 is provided with a plurality of thread through holes 3 (shown in figure 1) which are uniformly distributed around the periphery, and the thread through holes 3 longitudinally penetrate through the whole valve cover 1 and are respectively positioned in the area between the annular sealing groove 9 and the cover body edge 12. The oral area of rough pumping valve is equipped with annular concave station, and the screw has been seted up to the diapire in the annular concave station, and thereby the workman locks valve gap 1 on the concave station of the oral area of rough pumping valve in adorning valve gap 1 the concave station, thereby penetrates the screw through-hole 3 of valve gap 1, the screw of sealing washer and concave station with the screw, thereby the sealing washer on valve gap 1's the annular seal groove 9 receives the extrusion of concave station inside wall and thereby seals the space between concave station inside wall and the valve gap 1 ring week lateral wall.
As shown in fig. 2, a transverse and arc-shaped opening bottom groove 7 is formed in a partial section 10 of the bottom wall of the cover body edge 13 of the bottom layer 6 between every two adjacent threaded through holes 3, the opening bottom groove 7 is downward in notch, a bottom sealing strip 11 (see fig. 3) is arranged in the opening bottom groove 7, and the opening bottom groove 7 and the bottom sealing strip 11 are matched with the partial section 10 of the cover body edge 13 of the bottom layer 6 in shape. The bottom sealing strips 11 are respectively arranged at the positions of the valve cover 1, which are subjected to small stress of the screws, so that the gap between the inner bottom wall of the valve cover 1 and the inner bottom wall of the concave table, which are right below the positions, is sealed, and the integral sealing effect of the valve cover 1 is enhanced.
As shown in fig. 3, the top layer 2 is provided with a transverse and arc opening hidden groove 8 right above each opening bottom groove 7, the opening of the opening hidden groove 8 is provided on the outer side wall of the top layer 2, the arc opening hidden groove 8 is matched with the shape of a partial section 10 of the cover body edge 13, and an arc side sealing strip (not shown in the figure) is arranged in the arc opening hidden groove 8. The side sealing strips are respectively positioned at the positions of the valve cover 1, which are stressed by screws and are small, so that the gap between the outer side wall of the valve cover 1 corresponding to the positions and the inner side wall of the concave table is sealed, and the overall sealing effect of the valve cover 1 is enhanced.
The above description is only the embodiments of the present invention, and the scope of protection is not limited thereto. The insubstantial changes or substitutions will now be made by those skilled in the art based on the teachings of the present invention, which are still within the scope of the claims.
Claims (9)
1. Valve gap is taken out to the thick, and the lateral wall of lid is local inwards recessed to form the cyclic annular seal groove of round with the holding sealing washer, its characterized in that: a plurality of threaded through holes longitudinally penetrating through the cover body are formed in the region between the annular sealing groove and the edge of the cover body, a transverse opening hidden groove is formed in the local section, between every two adjacent threaded through holes, of the edge above the annular sealing groove, a sealing strip is accommodated in the transverse opening hidden groove, and the notch of the opening hidden groove is formed in the outer side wall of the cover body.
2. The roughing valve cover as recited in claim 1 wherein: the lid includes top layer and bottom, and the annular seal groove specifically lies in between top layer and the bottom, and the opening hidden groove specifically lies in on the top layer, and the lateral wall at the top layer is specifically seted up to the notch.
3. The roughing valve cover as defined in claim 2 wherein: the open troffer is arcuate to fit the shape of the partial segment.
4. The roughing valve cover as recited in claim 2 wherein: a transverse opening bottom groove is formed in the bottom layer under each opening hidden groove to accommodate the sealing strips, and the opening of the opening bottom groove faces downwards.
5. The roughing valve cover as recited in claim 4 wherein: the open bottom slot is arcuate to fit the shape of the partial section.
6. The roughing valve cover as recited in claim 1 wherein: the threaded through holes are uniformly distributed along the periphery of the edge of the top wall of the cover body.
7. The roughing valve cover as recited in claim 2 wherein: the cover body is disc-shaped, and a valve rod hole is formed in the circle center of the top layer and longitudinally penetrates through the cover body of the whole valve cover to allow a valve rod to penetrate through the cover body.
8. The roughing valve cover as defined in claim 1 wherein: includes a plurality of screws fitted into the plurality of threaded through holes, respectively.
9. The roughing valve cover as recited in claim 8 wherein: the sealing ring comprises a longitudinal through hole, and a screw penetrates through the thread through hole and the longitudinal through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221999828.9U CN217898966U (en) | 2022-07-29 | 2022-07-29 | Valve cover of rough pumping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221999828.9U CN217898966U (en) | 2022-07-29 | 2022-07-29 | Valve cover of rough pumping valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217898966U true CN217898966U (en) | 2022-11-25 |
Family
ID=84139398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221999828.9U Active CN217898966U (en) | 2022-07-29 | 2022-07-29 | Valve cover of rough pumping valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217898966U (en) |
-
2022
- 2022-07-29 CN CN202221999828.9U patent/CN217898966U/en active Active
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