CN214037015U - Low-pressure relief valve - Google Patents

Abstract

The utility model provides a low-pressure relief valve, which comprises a valve body and a valve cavity arranged in the valve body, wherein the valve cavity is internally provided with a valve core and a control part, the valve cavity comprises a first valve cavity and a second valve cavity which are communicated from left to right, the diameter size of the first valve cavity is smaller than that of the second valve cavity, the side wall of the valve core is circumferentially provided with an inwards concave annular mounting groove, an O-shaped sealing ring is arranged in the annular mounting groove, the valve body is also provided with an air inlet and an air leakage port, the inner wall of the first valve cavity and the right end face of the second valve cavity are intersected to form an annular edge line by arranging the first valve cavity and the second valve cavity with different diameters, the linear sealing effect is achieved by the control part pushing the O-shaped sealing ring to be in sealing contact with the annular edge line, compared with a surface sealing mode, the low-pressure relief valve can bear larger pressure, and can avoid the phenomenon of extrusion gap and edge cutting of the O-shaped sealing ring, the sealing effect is better.

Description

Low-pressure relief valve

Technical Field

The utility model relates to a hydraulic component makes the field, especially relates to a low pressure relief valve.

Background

In the low-pressure relief valve, because a small gap exists between the valve core and the valve body, the sealing effect is generally improved by installing an O-shaped ring, the O-shaped ring in the prior art is generally sealed with the inner wall surface of the valve cavity, the surface sealing can bear smaller pressure, and the O-shaped ring is easy to have extrusion gap trimming, so that the sealing effect is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that O type circle generally adopts and goes on with the sealed mode of the internal face of valve pocket among the low pressure relief valve of prior art, and the pressure that face seal can bear is less, and O type circle easily appears crowded crack and cuts edge, influences sealed effect, the utility model provides a low pressure relief valve solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a low-pressure relief valve comprises a valve body and a valve cavity arranged in the valve body, wherein a valve core and a control part are arranged in the valve cavity, the valve cavity comprises a first valve cavity and a second valve cavity which are communicated from left to right, the diameter size of the first valve cavity is smaller than that of the second valve cavity, and the inner wall of the first valve cavity and the left end face of the second valve cavity are intersected to form an annular edge line; on the lateral wall of case, be provided with the annular mounting groove of indent along circumference, install O type sealing washer in the annular mounting groove, the control part can push up left the case is followed the valve pocket slides left, and makes O type sealing washer with annular edge line sealing contact, still be equipped with air inlet and disappointing mouth on the valve body, the air inlet with first valve pocket is linked together, disappointing mouth with the second valve pocket is linked together.

Further: the control part includes pressure regulating bolt and spring, be equipped with on the valve body with the external screw thread matched with internal thread of pressure regulating bolt, the pressure regulating bolt is installed in the internal thread, the left part of pressure regulating bolt inserts in the valve pocket, fixed mounting has the spring holder on the pressure regulating bolt, the spring holder is located the valve intracavity, the spring housing is established on the pressure regulating bolt, the right-hand member of spring is installed on the spring holder, the top is installed to the left end of spring, the deformation power of spring can drive the top pushes away the case removes left.

Further: the pressure regulating bolt is further provided with a locking nut, and the locking nut is adjacent to the right end face of the valve body.

Further: and a guide hole is formed in the valve body and positioned on the left side of the first valve cavity, the guide hole is communicated with the first valve cavity, a guide post is slidably mounted in the guide hole, and the right end of the guide post is fixedly connected with the valve core.

The beneficial effects of the utility model are that, the utility model discloses low pressure relief valve is through setting up the different first valve pocket of diameter and second valve pocket for the inner wall of first valve pocket intersects with the right-hand member face of second valve pocket and forms an annular edge line, and pushes away O type sealing washer and reach the line seal effect with annular edge line sealing contact through the control part, compares in the face seal mode, can bear bigger pressure, can avoid O type sealing washer appearance extrusion crack side cut phenomenon simultaneously, and sealed effect is better.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the low-pressure relief valve of the present invention.

In the figure, the valve comprises a valve body 1, a valve body 21, a first valve cavity 22, a second valve cavity 3, a valve core 4, an annular edge line 5, an annular mounting groove 6, an O-shaped sealing ring 7, an air inlet 8, an air leakage opening 10, a pressure regulating bolt 11, a spring 12, a spring seat 13, a top head 14, a locking nut 15, a guide hole 16 and a guide column.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

As shown in fig. 1, the utility model provides a low-pressure relief valve, including valve body 1 and the valve chamber that sets up in the valve body 1, be equipped with case 3 and control part in the valve chamber, the valve chamber includes first valve chamber 21 and the second valve chamber 22 that communicate from left to right, the diameter size of first valve chamber 21 is less than the diameter size of second valve chamber 22, the inner wall of first valve chamber 21 intersects with the left end face of second valve chamber 22 and forms an annular edge line 4; on the lateral wall of case 3, be provided with the annular mounting groove 5 of indent along circumference, install O type sealing washer 6 in the annular mounting groove 5, the control part can push up left case 3 is followed the valve pocket slides left, and makes O type sealing washer 6 with 4 sealing contact of annular edge line, still be equipped with air inlet 7 and disappointing mouth 8 on the valve body 1, air inlet 7 with first valve pocket 21 is linked together, disappointing mouth 8 with second valve pocket 22 is linked together.

Through setting up the first valve pocket 21 and the second valve pocket 22 that the diameter is different for the inner wall of first valve pocket 21 intersects with the right-hand member face of second valve pocket 22 and forms an annular margin line 4, and pushes away O type sealing washer 6 and reach the line seal effect with annular margin line 4 sealing contact through the control part, compares in the face seal mode, can bear bigger pressure, can avoid O type sealing washer 6 to appear crowded crack side cut phenomenon simultaneously, and sealed effect is better.

The control part includes pressure regulating bolt 10 and spring 11, be equipped with on the valve body 1 with the external screw thread matched with internal thread of pressure regulating bolt 10, pressure regulating bolt 10 is installed in the internal thread, the left part of pressure regulating bolt 10 inserts in the valve pocket, fixed mounting has spring holder 12 on the pressure regulating bolt 10, spring holder 12 is located in the valve chamber, spring 11 cover is established on the pressure regulating bolt 10, the right-hand member of spring 11 is installed on the spring holder 12, top 13 is installed to the left end of spring 11, the deformation power of spring 11 can drive top 13 top 13 top pushes away 3 moves left of case. The pressure regulating bolt 10 is further provided with a locking nut 14, and the locking nut 14 is adjacent to the right end face of the valve body 1.

Through the degree that adjustment pressure bolt 10 installed into the valve pocket, and then the precompression volume of adjustment spring 11 to can realize the control to case 3 cracking pressure, this kind of adjustment mode is simple and convenient, and has higher reliability, can avoid the not hard up change cracking pressure of bolt through lock nut 14 simultaneously, and stability is higher.

The valve body 1 is provided with a guide hole 15 on the left side of the first valve cavity 21, the guide hole 15 is communicated with the first valve cavity 21, a guide post 16 is slidably mounted in the guide hole 15, and the right end of the guide post 16 is fixedly connected with the valve core 3. The guide post 16 is matched with the guide hole 15, so that the effect of stable sliding can be achieved, and the phenomena of poor sealing and locking caused by the deflection of the valve core 3 are avoided.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (4)

1. The utility model provides a low pressure relief valve, includes valve body (1) and sets up the valve pocket in valve body (1), its characterized in that: the valve cavity is internally provided with a valve core (3) and a control part, the valve cavity comprises a first valve cavity (21) and a second valve cavity (22) which are communicated from left to right, the diameter size of the first valve cavity (21) is smaller than that of the second valve cavity (22), and the inner wall of the first valve cavity (21) and the left end face of the second valve cavity (22) are intersected to form an annular edge line (4); on the lateral wall of case (3), be provided with annular mounting groove (5) of indent along circumference, install O type sealing washer (6) in annular mounting groove (5), the control part can push up left case (3) are followed the valve pocket slides left, and makes O type sealing washer (6) with annular edge line (4) sealing contact, still be equipped with air inlet (7) and disappointing mouth (8) on valve body (1), air inlet (7) with first valve pocket (21) are linked together, disappointing mouth (8) with second valve pocket (22) are linked together.

2. The low pressure relief valve of claim 1 wherein: the control part includes pressure regulating bolt (10) and spring (11), be equipped with on valve body (1) with the external screw thread matched with internal thread of pressure regulating bolt (10), pressure regulating bolt (10) are installed in the internal thread, insert the left part of pressure regulating bolt (10) in the valve pocket, fixed mounting has spring holder (12) on pressure regulating bolt (10), spring holder (12) are located in the valve pocket, spring (11) cover is established on pressure regulating bolt (10), the right-hand member of spring (11) is installed on spring holder (12), top (13) are installed to the left end of spring (11), the deformation power of spring (11) can drive top (13) top pushes away case (3) move left.

3. The low pressure relief valve of claim 2 wherein: the pressure regulating bolt (10) is further provided with a locking nut (14), and the locking nut (14) is adjacent to the right end face of the valve body (1).

4. The low pressure relief valve of claim 1 wherein: the valve body (1) is provided with a guide hole (15) on the left side of the first valve cavity (21), the guide hole (15) is communicated with the first valve cavity (21), a guide post (16) is slidably mounted in the guide hole (15), and the right end of the guide post (16) is fixedly connected with the valve core (3).

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