CN216112196U - Exhaust valve of hydraulic oil tank - Google Patents
Exhaust valve of hydraulic oil tank Download PDFInfo
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- CN216112196U CN216112196U CN202121454788.5U CN202121454788U CN216112196U CN 216112196 U CN216112196 U CN 216112196U CN 202121454788 U CN202121454788 U CN 202121454788U CN 216112196 U CN216112196 U CN 216112196U
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Abstract
The utility model discloses an exhaust valve of a hydraulic oil tank, which comprises a valve body, a valve rod penetrating through the valve body and a valve core connected to the tail end of the valve rod, wherein the valve rod is arranged on the valve body; a spring cavity, a lower rod body cavity and an air inlet cavity which are communicated in sequence are arranged in the valve body, and the diameters of the spring cavity and the air inlet cavity are larger than that of the lower rod body cavity; the valve rod comprises a middle rod body and a lower rod body which are connected, the diameter of the middle rod body is smaller than that of the spring cavity and larger than that of the lower rod body cavity, and the diameter of the lower rod body is smaller than that of the lower rod body cavity; the spring is sleeved outside the lower rod body in the spring cavity, when the valve rod is stressed to press down, the spring is compressed, a gap is formed between the valve core and the air inlet cavity, and when the valve rod is not stressed, the spring extends to enable the valve core to seal the air inlet cavity. The utility model has no special requirement on installation space, is convenient for exhaust and closing operation, and is beneficial to prolonging the service life of the hydraulic system.
Description
Technical Field
The utility model belongs to the technical field of engineering machinery, and particularly relates to an exhaust valve of a hydraulic oil tank.
Background
The influence of air on a hydraulic system is not negligible, the oil liquid of the hydraulic system can more or less blend some air when the hydraulic system works, the air reaches all places of the whole system along with the oil liquid and is finally released at the lower oil temperature of an oil tank, when the air in the oil tank is continuously accumulated along with time, the air pressure is gradually increased, so that the speed of releasing the air from the oil liquid is delayed, the air in the oil liquid can be continuously accumulated and finally has bad influence on the efficiency of the whole hydraulic system, for example, the air has compressibility, the air is remained in a hydraulic cylinder, a working medium forms an elastic body to cause the hydraulic cylinder to crawl, the air is blended in the hydraulic elements, when the hydraulic elements work, the air in the elements is compressed, along with the gradual increase of the pressure, the air is continuously dissolved in the hydraulic oil, and at the places where the relative motion between the oil liquid and the solid surface occurs, air dissolved in hydraulic oil is separated out to form bubbles, and then the bubbles can be collapsed when the bubbles flow to a place where the liquid pressure exceeds the bubble pressure, so that great impact force and high temperature are generated at the moment of collapse, and the surface of a part is damaged.
In addition, a prepressing oil tank is adopted under certain working conditions, the air pressure in the prepressing oil tank is high, air needs to be exhausted when a filter element is replaced, an exhaust screw is commonly used at present, the air needs to be exhausted by a tool, but the tool is small in operation space, difficult to exhaust, easy to feed water, uncontrollable in air exhaust direction and potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides the exhaust valve of the hydraulic oil tank, which has no special requirement on the installation space, is convenient to exhaust and close and is beneficial to prolonging the service life of a hydraulic system.
The utility model provides the following technical scheme:
a hydraulic oil tank exhaust valve comprises a valve body, a valve rod penetrating through the valve body and a valve core connected to the tail end of the valve rod;
the valve body is internally provided with a spring cavity, a lower rod body cavity and an air inlet cavity which are sequentially communicated, and the diameters of the spring cavity and the air inlet cavity are larger than that of the lower rod body cavity;
the valve rod comprises a middle rod body and a lower rod body which are connected, the diameter of the middle rod body is smaller than that of the spring cavity and larger than that of the lower rod body cavity, and the diameter of the lower rod body is smaller than that of the lower rod body cavity;
the spring cavity is internally provided with a spring sleeved outside the lower rod body, when the valve rod is stressed to press down, the spring is compressed, a gap is formed between the valve core and the air inlet cavity, and when the valve rod is not stressed, the spring extends to enable the valve core to seal the air inlet cavity.
Further, the valve body is internally provided with an exhaust cavity which is communicated with the spring cavity and has a diameter larger than the spring cavity, the valve rod further comprises a contact-preventing rod body connected with the middle rod body, and the diameter of the contact-preventing rod body is larger than the diameter of the spring cavity and smaller than the diameter of the exhaust cavity.
Furthermore, the outer surface of the anti-touch rod body is provided with a plurality of exhaust grooves extending along the axis direction of the valve rod.
Further, the valve rod still includes the last body of rod that links to each other with the body of rod of preventing touching and the end cover that links to each other with the last body of rod, the end cover includes the clamp plate that links to each other perpendicularly with the last body of rod and the fender that links to each other with the clamp plate edge encloses, keep off to enclose and be umbelliform and set up in valve body upper portion, and keep off the upper surface that encloses the edge and be less than the valve body.
Furthermore, the tail of the lower rod body is provided with an external thread, an internal thread matched with the external thread is arranged inside the valve core, and the lower rod body and the valve core are in threaded connection through the external thread and the internal thread.
Furthermore, the valve core is spherical and can realize line sealing with the edge of the air inlet cavity.
Furthermore, a valve core cavity which is communicated with the air inlet cavity and can contain the valve core is arranged in the valve body, and the inner surface of the valve core cavity is a spherical surface, a conical surface or a cylindrical surface.
Compared with the prior art, the utility model has the beneficial effects that:
the spring sleeved outside the lower rod body is arranged in the spring cavity, and the diameter of the spring cavity is larger than that of the cavity of the lower rod body, so that the spring can only stretch out and draw back in the spring cavity; when the air needs to be exhausted, the valve rod is pressed, the spring is compressed, and a gap is formed between the valve core and the air inlet cavity, so that air accumulated in a closed space in the hydraulic oil tank is exhausted, the sealing element in the hydraulic system is effectively protected, the service life of the sealing system is prolonged, and the service life of the hydraulic system is also prolonged; after the exhaust is finished, the force is not applied to the valve rod any more, the spring extends to enable the valve rod and the valve core to move upwards, and the valve core seals the air inlet cavity; the utility model has simple structure, convenient operation, no special requirement on installation space, controllable exhaust direction and no potential safety hazard.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a valve body;
FIG. 3 is a schematic illustration of the valve stem and valve cartridge configuration;
FIG. 4 is a schematic bottom view of the valve stem;
FIG. 5 is a schematic view of the present invention in the configuration when exhausting;
FIG. 6 is a schematic diagram of the structure of the utility model for preventing accidental touch;
labeled as: 1. a valve stem; 1-1, end cover; 1-1-1, pressing plate; 1-1-2, baffle; 1-2, mounting a rod body; 1-3, a contact prevention rod body; 1-4, a middle rod body; 1-5, lowering the rod body; 1-6, an exhaust groove; 2. a valve body; 2-1, an exhaust cavity; 2-2, a spring cavity; 2-3, a lower rod body cavity; 2-4, an air inlet cavity; 2-5, a valve core cavity; 3. a spring; 4. a valve core.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1-3, the present embodiment provides an exhaust valve for a hydraulic oil tank, which includes a valve body 2, a valve rod 1 disposed through the valve body 2, and a valve core 4 connected to a terminal of the valve rod 1; a spring cavity 2-2, a lower rod body cavity 2-3 and an air inlet cavity 2-4 which are sequentially communicated are arranged inside the valve body 2, and the diameters of the spring cavity 2-2 and the air inlet cavity 2-4 are larger than the diameter of the lower rod body cavity 2-3; the valve rod 1 comprises a middle rod body 1-4 and a lower rod body 1-5 which are connected, the diameter of the middle rod body 1-4 is smaller than that of the spring cavity 2-2 and larger than that of the lower rod body cavity 2-3, and the diameter of the lower rod body 1-5 is smaller than that of the lower rod body cavity 2-3; the spring 3 sleeved outside the lower rod body 1-5 is arranged in the spring cavity 2-2, when the valve rod 1 is pressed downwards under stress, the spring 3 is compressed, a gap is formed between the valve core 4 and the air inlet cavity 2-4, and when the valve rod 1 is not stressed, the spring 3 extends to enable the valve core 4 to seal the air inlet cavity 2-4.
The valve body 2 is also internally provided with an exhaust cavity 2-1 which is communicated with the spring cavity 2-2 and has a diameter larger than that of the spring cavity 2-2, the valve rod 1 also comprises an anti-touch rod body 1-3 which is connected with the middle rod body 1-4, and the diameter of the anti-touch rod body 1-3 is larger than that of the spring cavity 2-2 and smaller than that of the exhaust cavity 2-1, so that the anti-touch rod body 1-3 is always positioned in the exhaust cavity 2-1. When the lower surface of the anti-touch rod body 1-3 is connected with a step surface formed between the exhaust cavity 2-1 and the spring cavity 2-2, the exhaust cavity 2-1 is closed and cannot exhaust; when the lower surface of the anti-touch rod body 1-3 is separated from the step surface, air in the hydraulic oil tank can be exhausted to the outside along the air inlet cavity 2-4, the lower rod body cavity 2-3, the spring cavity 2-2 and the exhaust cavity 2-1. As shown in figure 4, the outer surface of the anti-touch rod body 1-3 is provided with a plurality of exhaust grooves 1-6 extending along the axial direction of the valve rod 1, so that exhaust is facilitated, and part of oil gas enters the exhaust grooves 1-6 during exhaust to play a certain lubricating role, so that the valve rod 1 is not easy to clamp.
The valve rod 1 also comprises an upper rod body 1-2 connected with the anti-touch rod body 1-3 and an end cover 1-1 connected with the upper rod body 1-2, the end cover 1-1 comprises a pressing plate 1-1-1 vertically connected with the upper rod body 1-2 and a baffle 1-1-2 connected with the edge of the pressing plate 1-1-1, the baffle 1-1-2 is arranged on the upper part of the valve body 2 in an umbrella shape, the processing is convenient, the air exhausted by the valve body 2 is guided, the safety of a user is ensured, the edge of the baffle 1-1-2 is lower than the upper surface of the valve body 2, and the water inlet of an exhaust valve can be effectively prevented.
The tail part of the lower rod body 1-5 is provided with an external thread, the inner part of the valve core 4 is provided with an internal thread matched with the external thread, the lower rod body 1-5 and the valve core 4 are in threaded connection through the external thread and the internal thread, the installation and the disassembly are convenient, and the valve core 4 is convenient to maintain and replace.
Example 2
As shown in fig. 1-3, the present embodiment provides a vent valve for a hydraulic oil tank, wherein a valve core 4 is spherical and can realize line sealing with the edge of an air inlet cavity 2-4. The valve body 2 is internally provided with a valve core cavity 2-5 which is communicated with the air inlet cavity 2-4 and can contain the valve core 4, and the inner surface of the valve core cavity 2-5 is a spherical surface, a conical surface or a cylindrical surface, in the embodiment, the spherical surface.
The exhaust working state of the utility model is shown in figure 5, the end cover 1-1 of the valve rod 1 is manually pressed, the valve rod 1 moves downwards to drive the valve core 4 to move downwards, the spring 3 is compressed, a gap is formed between the valve core 4 and the air inlet cavity 2-4, the gas in the hydraulic oil tank enters from the gap between the valve core 4 and the air inlet cavity 2-4, passes through the lower rod body cavity 2-3, the spring cavity 2-2 and the exhaust cavity 2-1 in sequence and is exhausted out of the hydraulic oil tank along the exhaust groove 1-6. As shown in figure 1, after the exhaust is finished, force is not applied to the end cover 1-1, the spring 3 extends to enable the valve rod 1 and the valve core 4 to move upwards, the valve core 4 seals the air inlet cavity 2-4, and the exhaust is not performed.
As shown in figure 6, when the exhaust valve is touched by mistake, the lower surface of the anti-touch rod body 1-3 is connected with a step surface formed between the exhaust cavity 2-1 and the spring cavity 2-2, the exhaust groove 1-6 and the exhaust cavity 2-1 are sealed, air is blocked from being exhausted, and safety is improved.
The utility model has simple structure, no special requirement on installation space, convenient exhaust and closing operation, controllable exhaust direction and no potential safety hazard, and is beneficial to prolonging the service life of a hydraulic system.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The exhaust valve of the hydraulic oil tank is characterized by comprising a valve body, a valve rod penetrating through the valve body and a valve core connected to the tail end of the valve rod;
the valve body is internally provided with a spring cavity, a lower rod body cavity and an air inlet cavity which are sequentially communicated, and the diameters of the spring cavity and the air inlet cavity are larger than that of the lower rod body cavity;
the valve rod comprises a middle rod body and a lower rod body which are connected, the diameter of the middle rod body is smaller than that of the spring cavity and larger than that of the lower rod body cavity, and the diameter of the lower rod body is smaller than that of the lower rod body cavity;
the spring cavity is internally provided with a spring sleeved outside the lower rod body, when the valve rod is stressed to press down, the spring is compressed, a gap is formed between the valve core and the air inlet cavity, and when the valve rod is not stressed, the spring extends to enable the valve core to seal the air inlet cavity.
2. The exhaust valve for the hydraulic oil tank as claimed in claim 1, wherein an exhaust cavity which is communicated with the spring cavity and has a diameter larger than that of the spring cavity is further arranged inside the valve body, the valve rod further comprises a contact preventing rod body which is connected with the middle rod body, and the diameter of the contact preventing rod body is larger than that of the spring cavity and smaller than that of the exhaust cavity.
3. The hydraulic tank vent valve of claim 2, wherein the outer surface of the anti-touch rod body is provided with a plurality of vent grooves extending along the axial direction of the valve rod.
4. The exhaust valve for the hydraulic oil tank as claimed in claim 2, wherein the valve rod further comprises an upper rod body connected with the anti-touch rod body and an end cover connected with the upper rod body, the end cover comprises a pressing plate vertically connected with the upper rod body and a baffle wall connected with the edge of the pressing plate, the baffle wall is arranged on the upper part of the valve body in an umbrella shape, and the edge of the baffle wall is lower than the upper surface of the valve body.
5. The exhaust valve of the hydraulic oil tank as claimed in claim 1, wherein the tail part of the lower rod body is provided with an external thread, the valve core is internally provided with an internal thread matched with the external thread, and the lower rod body and the valve core are in threaded connection through the external thread and the internal thread.
6. The hydraulic tank vent valve of claim 1, wherein the valve core is spherical and can realize line sealing with the edge of the air inlet cavity.
7. The exhaust valve of the hydraulic oil tank as claimed in claim 6, wherein a valve core cavity which is communicated with the air inlet cavity and can accommodate the valve core is arranged inside the valve body, and the inner surface of the valve core cavity is a spherical surface, a conical surface or a cylindrical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121454788.5U CN216112196U (en) | 2021-06-29 | 2021-06-29 | Exhaust valve of hydraulic oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121454788.5U CN216112196U (en) | 2021-06-29 | 2021-06-29 | Exhaust valve of hydraulic oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216112196U true CN216112196U (en) | 2022-03-22 |
Family
ID=80721099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121454788.5U Active CN216112196U (en) | 2021-06-29 | 2021-06-29 | Exhaust valve of hydraulic oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216112196U (en) |
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2021
- 2021-06-29 CN CN202121454788.5U patent/CN216112196U/en active Active
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