CN211474563U - Plane sealing bidirectional unloading valve - Google Patents
Plane sealing bidirectional unloading valve Download PDFInfo
- Publication number
- CN211474563U CN211474563U CN201922293390.7U CN201922293390U CN211474563U CN 211474563 U CN211474563 U CN 211474563U CN 201922293390 U CN201922293390 U CN 201922293390U CN 211474563 U CN211474563 U CN 211474563U
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- China
- Prior art keywords
- sealing plug
- valve seat
- shell
- guide rod
- plane
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 75
- 230000002457 bidirectional effect Effects 0.000 title abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model relates to a plane sealing bidirectional unloading valve, wherein a valve seat is in threaded connection with a shell, a left guide rod is arranged in a through hole of the valve seat, and the outer diameter of the left guide rod is smaller than the inner diameter of the through hole of the valve seat; the right guide rod is arranged in the through hole of the shell, and the outer diameter of the right guide rod is smaller than the inner diameter of the through hole of the shell; a left sealing plug and a right sealing plug are arranged in the valve seat, the left sealing plug is in threaded connection with a left guide rod, and the right sealing plug is in threaded connection with a right guide rod; the left sealing plug and the right sealing plug are both provided with positioning tables, and springs are sleeved on the positioning tables; the left sealing plug and the valve seat form plane sealing, and a concave plane is arranged at the plane sealing position of the left sealing plug and the valve seat; the right sealing plug and the shell form plane sealing, and the concave plane is arranged at the position of the right sealing plug and the plane sealing of the shell; the self-locking device has the advantages of self-locking capability, simple installation form and compact installation space.
Description
The technical field is as follows:
the utility model relates to an unloading valve relates to a two-way unloading valve of plane seal, belongs to hydraulic pressure valve technical field.
Background art:
in order to avoid the pressure rise in the hydraulic cylinder, a check valve with a built-in spring is generally adopted, a spring is applied with pretightening force for sealing, and when the pressure of a system is increased, the check valve is opened to unload the pressure in the hydraulic cylinder. The unloading mode is mainly used for the single-acting hydraulic cylinder, and the application in the field of double-acting oil cylinders is less. At present, a common unloading valve is generally formed by connecting a valve body, a guide rod, a steel ball or a conical part, and plays a role in sealing through a spherical surface or a conical surface, and the conventionally used cast steel ball has the problems of low precision, easy abrasion, poor sealing effect and the like.
The utility model has the following contents:
the utility model aims to overcome the defects of the prior art and provide a plane sealing bidirectional unloading valve.
The utility model provides a technical scheme as follows: a plane-sealed two-way unloading valve comprises a shell and is characterized in that a valve seat is arranged in the shell, the valve seat is in threaded connection with the shell, a through hole is formed in the valve seat, a left guide rod is arranged in the through hole of the valve seat, and the outer diameter of the left guide rod is smaller than the inner diameter of the through hole of the valve seat; the shell is provided with a through hole, the right guide rod is arranged in the through hole of the shell, and the outer diameter of the right guide rod is smaller than the inner diameter of the through hole of the shell; a left sealing plug and a right sealing plug are arranged in the valve seat, the left sealing plug is in threaded connection with a left guide rod, and the right sealing plug is in threaded connection with a right guide rod; the left sealing plug and the right sealing plug are both provided with positioning tables, and springs are sleeved on the positioning tables; the left sealing plug and the valve seat form plane sealing, and a concave plane is arranged at the plane sealing position of the left sealing plug and the valve seat; the right sealing plug and the shell form plane sealing, and a concave plane is arranged at the plane sealing position of the right sealing plug and the shell.
Further, a sealing element is arranged between the valve seat and the shell.
The utility model has the advantages that: the utility model adopts the plane sealing mode, the sealing reliability is high, the performance is good, and the service life is long; the spring provides pretightening force, has self-locking capacity, can provide good sealing performance when the equipment is static and moves, and can ensure zero leakage in a medium-low pressure working environment; the problems that the traditional unloading valve is easy to damage and difficult to process due to the use of spherical seal and conical seal are solved; the piston rod can be installed on the piston rod and can also be installed on the piston, the installation form is simple, and the installation space is compact.
Description of the drawings:
FIG. 1 is a schematic structural view of the utility model in a normal working state;
FIG. 2 is a schematic structural view of the present invention in a single-side pressurized state;
fig. 3 is a schematic structural diagram of the unloading state of the present invention.
The specific implementation mode is as follows: the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:
as shown in fig. 1, a two-way unloading valve with a plane seal comprises a housing 3, a valve seat 2 is arranged in the housing 3, the valve seat 2 is in threaded connection with the housing 3, and a sealing element 6 is arranged between the valve seat 2 and the housing 3; a through hole is formed in the valve seat 2, the left guide rod 1 is arranged in the through hole of the valve seat 2, the outer diameter of the left guide rod 1 is smaller than the inner diameter of the through hole of the valve seat 2, and the left guide rod 1 can axially move in the through hole; the shell 3 is provided with a through hole, the right guide rod 8 is arranged in the through hole of the shell 3, the outer diameter of the right guide rod 8 is smaller than the inner diameter of the through hole of the shell 3, and the right guide rod 8 can axially move in the through hole. A left sealing plug 4 and a right sealing plug 7 are arranged in the valve seat 2, the left sealing plug 4 is connected with the left guide rod 1 through threads, and the right sealing plug 7 is connected with the right guide rod 8 through threads; the left sealing plug 4 and the right sealing plug 7 are both provided with a positioning table, a spring 5 is sleeved on the positioning table, and the spring 5 has pre-tightening force on the left sealing plug 4 and the right sealing plug 7; the left sealing plug 4 and the valve seat 2 form plane sealing, and a concave plane is arranged at the plane sealing position of the left sealing plug 4 and the valve seat 2; the right sealing plug 7 and the shell 3 form plane sealing, and the plane sealing position of the right sealing plug 7 and the shell 3 is provided with an inwards concave plane.
The unloading valve can be unloaded in two directions, and the working principle of the unloading valve is described in detail by taking the fact that the unloading valve is installed on a piston of a hydraulic cylinder and pressurized on the left side as an example:
when the pressure on the left side is increased, the left sealing plug 4 moves rightwards under the action of oil pressure to compress the spring 5, the oil path on the left side is communicated with the inner cavity of the unloading valve, the spring 5 and the oil pressure apply a rightwards force to the right sealing plug 7, so that the right sealing plug 7 is attached to the shell 3 to form plane sealing, the communication between the inner cavity of the unloading valve and the oil path on the right side is blocked, and the unloading valve is closed;
when the unloading valve moves to the tail end along with the piston of the hydraulic cylinder in an unloading state as shown in figure 3, the right guide rod 8 collides with the front cover or the rear cover of the hydraulic cylinder to push the right sealing plug 7 to move, so that the inner cavity of the unloading valve is communicated with the right oil way, and the unloading valve is opened.
It should be understood that parts of the specification not set forth in detail are well within the prior art. The above description of the preferred embodiments is in great detail, but should not be construed as limiting the scope of the invention.
Claims (2)
1. A plane-sealed two-way unloading valve comprises a shell (3) and is characterized in that a valve seat (2) is arranged in the shell (3), the valve seat (2) is in threaded connection with the shell (3), a through hole is formed in the valve seat (2), a left guide rod (1) is arranged in the through hole of the valve seat (2), and the outer diameter of the left guide rod (1) is smaller than the inner diameter of the through hole of the valve seat (2); a through hole is formed in the shell (3), the right guide rod (8) is arranged in the through hole of the shell (3), and the outer diameter of the right guide rod (8) is smaller than the inner diameter of the through hole of the shell (3); a left sealing plug (4) and a right sealing plug (7) are arranged in the valve seat (2), the left sealing plug (4) is in threaded connection with the left guide rod (1), and the right sealing plug (7) is in threaded connection with the right guide rod (8); the left sealing plug (4) and the right sealing plug (7) are both provided with a positioning table, and a spring (5) is sleeved on the positioning tables; the left sealing plug (4) and the valve seat (2) form plane sealing, and a concave plane is arranged at the plane sealing position of the left sealing plug (4) and the valve seat (2); the right sealing plug (7) and the shell (3) form plane sealing, and a concave plane is arranged at the plane sealing position of the right sealing plug (7) and the shell (3).
2. A two-way unloader valve with a flat seal according to claim 1, wherein a seal (6) is provided between the valve seat (2) and the housing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922293390.7U CN211474563U (en) | 2019-12-19 | 2019-12-19 | Plane sealing bidirectional unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922293390.7U CN211474563U (en) | 2019-12-19 | 2019-12-19 | Plane sealing bidirectional unloading valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474563U true CN211474563U (en) | 2020-09-11 |
Family
ID=72359749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922293390.7U Expired - Fee Related CN211474563U (en) | 2019-12-19 | 2019-12-19 | Plane sealing bidirectional unloading valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211474563U (en) |
-
2019
- 2019-12-19 CN CN201922293390.7U patent/CN211474563U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 |