CN215949979U - Plug-in overflow valve and corresponding valve block - Google Patents
Plug-in overflow valve and corresponding valve block Download PDFInfo
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- CN215949979U CN215949979U CN202121713208.XU CN202121713208U CN215949979U CN 215949979 U CN215949979 U CN 215949979U CN 202121713208 U CN202121713208 U CN 202121713208U CN 215949979 U CN215949979 U CN 215949979U
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Abstract
The utility model relates to a plug-in overflow valve and a corresponding valve block, wherein the plug-in overflow valve comprises: the valve comprises a valve body, a jackscrew, a nut, a piston body, a spring, a sealing ring, a valve core and a plug; the piston body, the spring and the valve core are sequentially arranged in an inner hole of the valve body from top to bottom, and the spring is a compression spring and is abutted between the piston body and the valve core; the jackscrew is arranged in the inner threaded hole at the upper end of the valve body, and a nut is arranged at one end of the jackscrew leaking out of the valve body; the plug is provided with external threads, the axis of the plug is provided with a through hole, and the upper end of the axis of the plug is provided with an inner hexagon; the valve body is fixed on an installation screw hole of the valve block through external threads at the lower end, the plug is fastened in the plug screw hole, and a cone at the lower end of the valve core is tightly pressed on a round hole of the plug under the action of a spring; the utility model has the advantages of fewer parts, simple structure, simple shape of the corresponding valve hole of the valve block, low processing difficulty of the valve block and low cost.
Description
Technical Field
The utility model relates to the field of hydraulic valves, in particular to a plug-in overflow valve and a corresponding valve block.
Background
The plug-in overflow valve is a common valve element of a hydraulic system and is used for limiting the pressure of the system, and the plug-in overflow valve is widely applied to engineering machinery, environment-friendly machinery, mining machinery and the like with the advantages of small size, compact structure, small internal leakage, flexible application, low price and the like.
The existing plug-in overflow valve has a relatively complex structure and a plurality of parts, the valve hole shape of a corresponding plug-in overflow valve block is complex and is often a plurality of steps, the coaxiality, the verticality, the aperture deviation and the step surface roughness of each step are ensured at the same time, the processing difficulty is high even if a numerical control processing center is used for processing, the rejection rate of valve block processing is high, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a plug-in overflow valve and a corresponding valve block.
The cartridge overflow valve includes: the valve comprises a valve body, a jackscrew, a nut, a piston body, a spring, a sealing ring, a valve core and a plug;
the valve body is provided with a coaxial inner hole, the upper end of the valve body is provided with an inner hole, the outer surface of the valve body is provided with an outer hexagon convenient for clamping and stressing by a wrench, the lower side of the outer hexagon is provided with a plane for positioning and sealing, and an outer thread is arranged below the plane;
the piston body is a cylinder, the outer diameter of the piston body is in clearance fit with the inner hole of the valve body, a groove is formed in the outer diameter of the piston body, an O-shaped ring is arranged in the groove, and the O-shaped ring is in fit sealing with the inner hole of the valve body;
the upper end of the valve core is a cylinder, the lower end of the valve core is an inverted cone, and the outer diameter of the cylinder is in clearance fit with the inner hole of the valve body;
the piston body, the spring and the valve core are sequentially arranged in an inner hole of the valve body from top to bottom, and the spring is a compression spring and is abutted between the piston body and the valve core;
the jackscrew is arranged in the inner threaded hole at the upper end of the valve body, and a nut is arranged at one end of the jackscrew leaking out of the valve body;
the plug is provided with external threads, the axis of the plug is provided with a through hole, and the upper end of the axis of the plug is provided with an inner hexagon.
The corresponding valve block of the plug-in overflow valve is provided with: the oil inlet hole, the screwed plug screw hole and the mounting screw hole are arranged on an axis perpendicular to the surface of the valve block, the mounting screw hole is arranged at the upper end, the screwed plug screw hole is arranged at the lower end, the oil inlet hole is arranged below the screwed plug screw hole, and the oil return hole is arranged on the hole wall between the mounting screw hole and the screwed plug screw hole.
Preferably, the valve body upper end sets up the external screw thread, sets up the protecting cover of in-band screw thread in addition, the protecting cover passes through screw-thread fit to be fixed in the valve body upper end, covers jackscrew and nut, prevents that the overflow valve from being touched.
Preferably, the piston body is a two-section cylinder, the outer diameter of the upper section cylinder is in clearance fit with the inner hole of the valve body, a groove is formed in the upper section cylinder, an O-shaped ring is arranged in the groove, and the O-shaped ring is in fit sealing with the inner hole of the valve body; the outer diameter of the lower section cylinder of the piston body is slightly smaller than the inner diameter of the spring.
Preferably, the valve core is provided with an upper section cylinder, a middle section cylinder and a lower section cone, the outer diameter of the upper section cylinder is slightly smaller than the inner diameter of the spring, the outer diameter of the middle section cylinder is in clearance fit with the inner hole of the valve body, the lower section cone is inverted, and the surface of the cone is a sealing surface.
Preferably, the external thread of the plug is a sealing conical external thread, and the plug screw hole on the valve block is a sealing cylindrical internal thread or a sealing conical internal thread correspondingly.
The utility model relates to a plug-in overflow valve and a corresponding valve block, wherein a valve body is fixed on an installation screw hole through external threads at the lower end, a sealing ring is arranged between a valve body positioning and sealing plane and a valve block plane, a plug is fastened in a plug screw hole, and a cone at the lower end of a valve core is tightly pressed on a round hole of the plug under the action of a spring; the hydraulic oil flows into the valve core from the oil inlet hole and acts on the valve core, when the pressure of the hydraulic oil rises to exceed the acting force of the spring, the valve core is pushed, and the hydraulic oil flows out from the oil return hole.
The adjusting jackscrew is screwed into the valve body to adjust the position of the piston body at a distance, so that the pre-tightening force of the piston body and the valve core middle spring is changed; the jackscrew rotates and moves downwards to push the piston body to compress the spring, the force of the corresponding valve core acting on the plug is increased, and the set pressure of the overflow valve is increased; the jackscrew rotates and moves upwards to loosen the spring, the force of the corresponding valve core acting on the plug is reduced, and the set pressure of the overflow valve is reduced; and after the jackscrew is adjusted, the nut is screwed down to prevent the jackscrew from loosening.
The utility model has the advantages of few parts, simple structure, simple shape of the corresponding valve hole of the valve block, no requirement on high-precision inner hole deviation and roughness, low processing difficulty of the valve block and low cost.
Drawings
FIG. 1 is a cross-sectional view of a cartridge relief valve according to the present invention.
Fig. 2 is a perspective exploded view of the cartridge relief valve of the present invention.
FIG. 3 is a sectional view of a corresponding valve block of the cartridge overflow valve of the present invention.
FIG. 4 is a sectional view of the cartridge overflow valve of the present invention assembled to a corresponding valve block
In the figure: 1. an overflow valve; 101. carrying out top thread; 102. a nut; 103. a valve body; 104. a piston body; 105. an O-shaped ring; 106. a spring; 107. a seal ring; 108. a valve core; 109. plugging with a thread; 110. a protective cover; 2. a valve block; 201. a valve block surface; 202. mounting a screw hole; 203. plugging the screw hole by using a screw; p, an oil inlet hole; t, oil return hole.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description is provided for purposes of illustration and explanation and is not intended to limit the scope of the utility model.
As shown in fig. 1 and 2, the relief valve 1 includes: the valve comprises a valve body 103, a jackscrew 101, a nut 102, a piston body 104, a spring 106, a sealing ring 107, a valve core 108, a plug 109 and a cover 110; the valve body 103 is provided with a coaxial inner hole, the upper end of the valve body 103 is provided with an inner screw hole, the outer surface of the valve body 103 is provided with an outer hexagon convenient for clamping and stressing by a wrench, the lower side of the outer hexagon is provided with a plane for positioning and sealing, and an outer screw thread is arranged below the plane; the upper end of the valve body 103 is provided with an external thread;
the piston body 104 is a two-section cylinder, the outer diameter of the upper section cylinder is in clearance fit with the inner hole of the valve body 103, a groove is formed in the upper section cylinder, an O-shaped ring 105 is arranged in the groove, and the O-shaped ring 105 is in fit sealing with the inner hole of the valve body 103; the outer diameter of the lower cylindrical part of the piston body 104 is slightly smaller than the inner diameter of the spring 106;
the valve core 103 is provided with an upper section cylinder, a middle section cylinder and a lower section cone, the outer diameter of the upper section cylinder is slightly smaller than the inner diameter of the spring 106, the outer diameter of the middle section cylinder is in clearance fit with the inner hole of the valve body 103, the lower section cone is inverted, and the surface of the cone is a sealing surface;
the piston body 104, the spring 106 and the valve core 108 are sequentially arranged in an inner hole of the valve body 103 from top to bottom, and the spring 106 is a compression spring and is abutted between the piston body 104 and the valve core 108; the lower cylinder of the piston body 104 and the upper cylinder of the valve core 108 are respectively inserted into the spring 106;
the jackscrew 101 is arranged in an inner threaded hole at the upper end of the valve body 103, and a nut 102 is arranged at one end of the jackscrew 101 leaking out of the valve body 103;
a protective cover 110 with internal threads is arranged, the protective cover 110 is fixed at the upper end of the valve body 103 through thread matching and covers the jackscrew 101 and the nut 102 to prevent the jackscrew from being touched;
the plug 109 is provided with external threads, the axis of the plug 109 is provided with a through hole, and the upper end of the axis of the plug 109 is provided with an inner hexagon.
As shown in fig. 3, the corresponding valve block 2 of the cartridge overflow valve is provided with: the oil inlet hole P, the oil return hole T, the plug screw hole 203 and the mounting screw hole 202 are arranged on an axis perpendicular to the surface 201 of the valve block, the mounting screw hole 202 is arranged at the upper end of the oil inlet hole P, the plug screw hole 203 is arranged at the lower end of the oil inlet hole P, the oil return hole T is arranged on the hole wall between the mounting screw hole 202 and the plug screw hole 203, and the plug screw hole 203 is arranged at the lower end of the oil inlet hole P.
As shown in fig. 4, the valve body 1 is fixed on a mounting screw hole 202 through external threads at the lower end, a sealing ring 107 is arranged between a positioning and sealing plane of the valve body 1 and a valve block plane 201, the plug 109 is fastened in a plug screw hole 203, and a lower end cone of the valve core 108 is pressed on a round hole of the plug 109 under the action of a spring 106; hydraulic oil flows into the oil inlet hole P and acts on the valve core 108, when the pressure of the hydraulic oil rises to exceed the acting force of the spring 106, the valve core 108 is pushed, and the hydraulic oil flows out of the oil return hole T;
the position of the piston body 104 is adjusted by adjusting the distance that the jackscrew 101 is screwed into the valve body 103, so that the pre-tightening force of the intermediate spring 106 between the piston body 104 and the valve core 108 is changed; the jackscrew 101 rotates and moves downwards to push the piston body 104 to compress the spring 106, the force of the corresponding valve core 108 acting on the plug 109 is increased, and the set pressure of the overflow valve 1 is increased; the jackscrew 101 rotates and moves upwards to loosen the spring 106, the force of the corresponding valve core 108 acting on the plug 109 is reduced, and the set pressure of the overflow valve 1 is reduced; after the jackscrew 101 is adjusted, the nut 102 is screwed to prevent the jackscrew 101 from loosening.
Claims (8)
1. A cartridge overflow valve, comprising: the valve comprises a valve body, a jackscrew, a nut, a piston body, a spring, a sealing ring, a valve core and a plug; the valve body is provided with a coaxial inner hole, the upper end of the valve body is provided with an inner screw hole, the outer surface of the valve body is provided with an outer hexagon, the lower side of the outer hexagon is provided with a plane for positioning and sealing, and an outer screw thread is arranged below the plane;
the piston body is a cylinder, the outer diameter of the piston body is in clearance fit with the inner hole of the valve body, a groove is formed in the outer diameter of the piston body, an O-shaped ring is arranged in the groove, and the O-shaped ring is in fit sealing with the inner hole of the valve body;
the upper end of the valve core is a cylinder, the lower end of the valve core is an inverted cone, and the outer diameter of the cylinder is in clearance fit with the inner hole of the valve body;
the piston body, the spring and the valve core are sequentially arranged in an inner hole of the valve body from top to bottom, and the spring is a compression spring and is abutted between the piston body and the valve core;
the jackscrew is arranged in the inner threaded hole at the upper end of the valve body, and a nut is arranged at one end of the jackscrew leaking out of the valve body;
the plug is provided with external threads, the axis of the plug is provided with a through hole, and the upper end of the axis of the plug is provided with an inner hexagon.
2. The cartridge overflow valve of claim 1 wherein the upper end of the valve body is externally threaded and a protective cap with internal threads is provided and is secured to the upper end of the valve body by a threaded engagement to cover the jackscrew and the nut.
3. The plug-in overflow valve of claim 1, wherein the piston body is a two-section cylinder, the outer diameter of the upper section cylinder is in clearance fit with the inner hole of the valve body, a groove is arranged on the upper section cylinder, an O-shaped ring is arranged in the groove, and the O-shaped ring is in fit sealing with the inner hole of the valve body; the outer diameter of the lower section cylinder of the piston body is slightly smaller than the inner diameter of the spring.
4. The cartridge overflow valve of claim 1 wherein the valve element has an upper section cylinder, a middle section cylinder, and a lower section cone, the outer diameter of the upper section cylinder is slightly smaller than the inner diameter of the spring, the outer diameter of the middle section cylinder is in clearance fit with the inner bore of the valve body, and the lower section cone is inverted.
5. The cartridge overflow valve of claim 1 wherein the external thread of the plug is a sealing conical external thread.
6. The utility model provides a corresponding valve block of cartridge overflow valve which characterized in that, set up on the valve block: the oil inlet hole, the screwed plug screw hole and the mounting screw hole are arranged on an axis perpendicular to the surface of the valve block, the mounting screw hole is arranged at the upper end, the screwed plug screw hole is arranged at the lower end, the oil inlet hole is arranged below the screwed plug screw hole, and the oil return hole is arranged on the hole wall between the mounting screw hole and the screwed plug screw hole.
7. The valve block according to claim 6, wherein the plug screw hole of the valve block is a sealing cylindrical internal thread.
8. The corresponding valve block of a plug-in overflow valve according to claim 6, wherein the plug screw hole of the valve block is a sealing conical internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121713208.XU CN215949979U (en) | 2021-07-27 | 2021-07-27 | Plug-in overflow valve and corresponding valve block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121713208.XU CN215949979U (en) | 2021-07-27 | 2021-07-27 | Plug-in overflow valve and corresponding valve block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215949979U true CN215949979U (en) | 2022-03-04 |
Family
ID=80434149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121713208.XU Active CN215949979U (en) | 2021-07-27 | 2021-07-27 | Plug-in overflow valve and corresponding valve block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215949979U (en) |
-
2021
- 2021-07-27 CN CN202121713208.XU patent/CN215949979U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 253034 Shandong city in Dezhou Province Economic Development Zone, the first northbound Regent Patentee after: Jingjin Equipment Co.,Ltd. Address before: 253034 Shandong city in Dezhou Province Economic Development Zone, the first northbound Regent Patentee before: Jing Jin Environmental Protection Inc. |