CN211976000U - Relief valve seal structure - Google Patents
Relief valve seal structure Download PDFInfo
- Publication number
- CN211976000U CN211976000U CN202020361954.6U CN202020361954U CN211976000U CN 211976000 U CN211976000 U CN 211976000U CN 202020361954 U CN202020361954 U CN 202020361954U CN 211976000 U CN211976000 U CN 211976000U
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- valve seat
- valve
- pressure relief
- sealing
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Abstract
The utility model discloses a relief valve sealing structure, which comprises a base, wherein an inner hole with an opening at the left end is arranged in the base, the inner hole is in threaded connection with a valve seat, the valve seat extends out of the base leftwards, the valve seat is in threaded connection with a cap-shaped nut, a liquid inlet communicated with an external liquid pipeline through a pipeline is arranged on the base, and a connecting port is arranged at the right end of the valve hole and communicated with the liquid inlet; the right surface of the valve seat is pressed with the base together, the right surface of the valve seat is integrally provided with an annular sealing bulge in a right-side protruding manner, and the vertical section of the sealing bulge is in a conical shape with a large left and a small right; the hardness of the base is less than that of the sealing protrusion. Adopt the utility model discloses a structure requires greatly reduced to the roughness of the fitting surface of disk seat and base and the machining precision of the parallelism of the two to the processing cost has been reduced. The pressure generated by spinning assembly is intensively applied to the sharp corner part of the sealing bulge, so that the sharp corner part of the sealing bulge can be pressed into the base, and the sealing effect is greatly enhanced.
Description
Technical Field
The utility model relates to a relief valve especially relates to pressure valve part seal structure.
Background
The structure of the conventional pressure relief valve is shown in fig. 1, and the structure of the conventional pressure relief valve comprises a cap nut 3, a composite washer 11, a valve seat 2, a spring 8, a steel ball 9 and a base 1, wherein the sealing type of the valve seat 2 and the base 1 is shown in fig. 1, the matching surfaces of the valve seat 2 and the base 1 are planes, and the matching surfaces of the valve seat 2 and the base 1 are mutually compressed to form a plane sealing surface.
Because valve seat 2 and base 1 will form sealed face, consequently to the depth of parallelism and base 1 fitting surface quality requirement of two machine-tooled part sealing faces higher, the machining precision requirement is higher, otherwise, cause to press to form the clearance between two sealed faces after the dress easily, lead to the sealed inefficacy of cooperation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a relief valve seal structure reduces the machining precision requirement, promotes sealed effect.
In order to achieve the purpose, the pressure relief valve sealing structure comprises a base, wherein an inner hole with an opening at the left end is arranged in the base, the inner hole is in threaded connection with a valve seat, and the axis of the valve seat is arranged along the left and right directions; the valve seat extends out of the base leftwards, a part of the valve seat extending out of the base is in threaded connection with a cap-shaped nut, a valve hole which is communicated leftwards and rightwards is formed in the valve seat, a liquid inlet which is communicated with an external liquid pipeline through a pipeline is formed in the base, and a connecting port is formed in the right end of the valve hole and communicated with the liquid inlet;
an annular pressure relief cavity is arranged in the base around the right part of the valve seat; the right part of the base is provided with a pressure relief hole along the radial direction of the valve seat, and the valve hole is communicated with the pressure relief cavity through the pressure relief hole;
a spring is arranged in the valve hole, the left end of the spring is in compression joint with the cap nut, the right end of the spring is in compression joint with a steel ball, and the steel ball is in compression joint with the connecting port and is in sealing fit with the side wall of the connecting port; the axes of the spring, the cover-shaped nut and the valve hole are in the same straight line;
the right surface of the valve seat is pressed with the base together, the right surface of the valve seat is integrally provided with an annular sealing bulge in a right-side protruding manner, and the vertical section of the sealing bulge is in a conical shape with a large left and a small right; the hardness of the base is less than that of the sealing protrusion.
Three pressure relief holes are arranged.
A composite washer is pressed between the cap nut and the base, and the composite washer is sleeved on the valve seat.
The liquid inlet is communicated with a high-pressure part of the external liquid pipeline, and the pressure relief cavity is communicated with a low-pressure part of the external liquid pipeline.
The utility model discloses the annular sealed protruding 10's that sets up vertical cross-section is big-end-left-hand-right toper, and when assembling the relief valve, disk seat 2 is through from the left side to the right side spinning assembly, makes sealed protruding 10's sharp bight divide the base 1 of impressing in 1 corresponding fitting surface positions of base, forms an annular seal area that is less than the fitting surface, forms the line seal, and the roughness of disk seat 2 and 1 base's fitting surface and the depth of parallelism of the two no longer influence sealed effect, make sealed more reliable.
The hardness of the base is less than the hardness of the sealing bead, which makes it easier for the hard material (annular sealing bead) to be pressed into the soft material (base), making the seal more reliable.
Adopt the utility model discloses a structure requires greatly reduced to the roughness of the fitting surface of disk seat 2 and base 1 and the machining precision of the depth of parallelism of the two to the processing cost has been reduced. The pressure generated by the spinning assembly is intensively applied to the sharp corner part of the sealing bulge 10, so that the sharp corner part of the sealing bulge 10 can be pressed into the base 1, and the sealing effect is greatly enhanced.
The three pressure relief holes 7 are arranged, so that the pressure relief function can be realized more rapidly, and liquid can enter the pressure relief cavity 6 more rapidly and flow back to the low-pressure part of the external liquid pipeline.
The arrangement of the composite washer 11 can avoid the situation that the cap nut 3 with high hardness and the base 1 are directly pressed together, and can protect the matching surfaces of the base 1 and the cap nut 3, and the base 1 and the cap nut 3 are prevented from being damaged due to extrusion.
The pressure relief cavity 6 is communicated with the low-pressure part of the external liquid pipeline through a pipeline, so that liquid can flow back to the external liquid pipeline in time, the liquid working medium can be recycled, and the pressure relief capacity is not limited to the volume of the pressure relief cavity 6.
Drawings
FIG. 1 is a schematic diagram of a prior art pressure relief valve;
fig. 2 is a schematic structural diagram of a pressure relief valve according to the present invention;
fig. 3 is an enlarged view at a in fig. 2.
Detailed Description
As shown in fig. 2 and 3, the pressure relief valve sealing structure of the present invention includes a base 1, an inner hole with an opening at the left end is arranged in the base 1, the inner hole is connected with a valve seat 2 by a screw thread, and the axis of the valve seat 2 is arranged along the left and right direction; the valve seat 2 extends out of the base 1 leftwards, a part of the valve seat 2 extending out of the base 1 is in threaded connection with a cap nut 3, a valve hole which is communicated with the left and the right is formed in the valve seat 2, a liquid inlet 4 communicated with an external liquid pipeline through a pipeline is formed in the base 1, a connecting port 5 is formed in the right end of the valve hole, and the connecting port 5 is communicated with the liquid inlet 4;
an annular pressure relief cavity 6 is arranged in the base 1 around the right part of the valve seat 2; the right part of the base 1 is provided with a pressure relief hole 7 along the radial direction of the valve seat 2, and the valve hole is communicated with a pressure relief cavity 6 through the pressure relief hole 7;
a spring 8 is arranged in the valve hole, the left end of the spring 8 is in compression joint with the cap-shaped nut 3, the right end of the spring is in compression joint with a steel ball 9, and the steel ball 9 is in compression joint with the connecting port 5 and is in sealing fit with the side wall of the connecting port 5; the axes of the spring 8, the cap nut 3 and the valve hole are in the same straight line;
the right surface of the valve seat 2 is pressed with the base 1, an annular sealing bulge 10 is integrally arranged on the right surface of the valve seat 2 in a rightward protruding mode, and the vertical section of the sealing bulge 10 is in a conical shape with a large left side and a small right side; the hardness of the base 1 is less than that of the sealing projection 10.
Three pressure relief holes 7 are provided.
A composite washer 11 is pressed between the cap nut 3 and the base 1, and the composite washer 11 is sleeved on the valve seat 2.
The liquid inlet 4 is communicated with a high-pressure part of the external liquid pipeline, and the pressure relief cavity 6 is communicated with a low-pressure part of the external liquid pipeline.
When the pressure release valve is assembled, the valve seat 2 is assembled by spinning from left to right, so that the sharp corner part of the sealing bulge 10 is pressed into the base 1 at the corresponding matching surface position of the base 1 to form an annular sealing strip lower than the surface of the matching surface, line sealing is formed, the flatness of the matching surface of the valve seat 2 and the base 1 and the parallelism of the two do not influence the sealing effect any more, and the sealing is more reliable.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (4)
1. The pressure relief valve sealing structure comprises a base, wherein an inner hole with an opening at the left end is formed in the base, the inner hole is in threaded connection with a valve seat, and the axis of the valve seat is arranged along the left-right direction; the valve seat extends out of the base leftwards, a part of the valve seat extending out of the base is in threaded connection with a cap-shaped nut, a valve hole which is communicated leftwards and rightwards is formed in the valve seat, a liquid inlet which is communicated with an external liquid pipeline through a pipeline is formed in the base, and a connecting port is formed in the right end of the valve hole and communicated with the liquid inlet;
the method is characterized in that:
an annular pressure relief cavity is arranged in the base around the right part of the valve seat; the right part of the base is provided with a pressure relief hole along the radial direction of the valve seat, and the valve hole is communicated with the pressure relief cavity through the pressure relief hole;
a spring is arranged in the valve hole, the left end of the spring is in compression joint with the cap nut, the right end of the spring is in compression joint with a steel ball, and the steel ball is in compression joint with the connecting port and is in sealing fit with the side wall of the connecting port; the axes of the spring, the cover-shaped nut and the valve hole are in the same straight line;
the right surface of the valve seat is pressed with the base together, the right surface of the valve seat is integrally provided with an annular sealing bulge in a right-side protruding manner, and the vertical section of the sealing bulge is in a conical shape with a large left and a small right; the hardness of the base is less than that of the sealing protrusion.
2. The pressure relief valve sealing structure of claim 1, characterized in that: three pressure relief holes are arranged.
3. The pressure relief valve sealing structure of claim 1, characterized in that: a composite washer is pressed between the cap nut and the base, and the composite washer is sleeved on the valve seat.
4. The relief valve sealing structure according to any one of claims 1 to 3, characterized in that: the liquid inlet is communicated with a high-pressure part of the external liquid pipeline, and the pressure relief cavity is communicated with a low-pressure part of the external liquid pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020361954.6U CN211976000U (en) | 2020-03-20 | 2020-03-20 | Relief valve seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020361954.6U CN211976000U (en) | 2020-03-20 | 2020-03-20 | Relief valve seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211976000U true CN211976000U (en) | 2020-11-20 |
Family
ID=73379938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020361954.6U Active CN211976000U (en) | 2020-03-20 | 2020-03-20 | Relief valve seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211976000U (en) |
-
2020
- 2020-03-20 CN CN202020361954.6U patent/CN211976000U/en active Active
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