CN213017904U

CN213017904U - Hard sealing multifunctional check valve

Info

Publication number: CN213017904U
Application number: CN202021069961.5U
Authority: CN
Inventors: 王广; 杨金胜; 张乐全; 刘娜; 王荣辉
Original assignee: Bensv Valve Stock Co ltd
Current assignee: Bensv Valve Stock Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-04-20
Anticipated expiration: 2030-06-11

Abstract

The utility model provides a hard sealed multifunctional check valve belongs to valve manufacturing technical field, including valve body, case, valve shaft, nut, compression spring, valve gap, gland, stop screw and hand wheel, inside coaxial by interior and outer valve shaft and the case of being provided with of valve body, the lower extreme of valve shaft has the circular bead, nut threaded connection is at the lowest end of valve shaft, valve shaft and compression spring are coaxial by interior and outer setting and compression spring on the case, valve shaft and valve gap are coaxial by interior and outer setting and the valve gap is fixed at the valve body top, stop screw installs at the valve shaft top, stop screw and gland are coaxial by interior and outer setting, the hand wheel is fixed at stop screw the top. The utility model discloses simple structure, simple to operate, long service life, service temperature range is wide.

Description

Hard sealing multifunctional check valve

Technical Field

The utility model belongs to the technical field of the valve is made, a multi-functional check valve of hard seal is related to.

Background

The check valve is a valve for controlling the unidirectional flow of the medium in the pipeline and is used for preventing the medium in the pipeline from flowing backwards. The check valve is automatically opened and closed by the force generated by the flowing of the medium in the pipeline, belongs to an automatic valve, and has poor sealing performance and can not effectively prevent the medium from flowing backwards.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is a multi-functional check valve of hard seal belongs to the valve and makes technical field, simple structure, simple to operate, and the leakproofness is good, can effectively prevent the emergence of medium refluence.

In order to solve the technical problem, the utility model discloses a technical scheme is: hard sealed multifunctional check valve belongs to valve manufacturing technical field, including valve body, case, valve shaft, nut, compression spring, valve gap, gland, stop screw and hand wheel, the inside coaxial by interior and outer valve shaft and case that is provided with of valve body, the lower extreme of valve shaft have the circular bead, and the circular bead is in the coincidence department of valve shaft and case top, and the valve shaft from top to bottom diameter diminishes in proper order, nut threaded connection is at the lowest end of valve shaft, valve shaft and compression spring are coaxial by interior and outer setting and compression spring on the case, compression spring's upper end and gland rigid coupling and lower extreme and case rigid coupling, valve shaft and valve gap are coaxial by interior and outer setting and the valve gap is fixed at the valve body top, stop screw installs at the valve shaft top, stop screw and the coaxial by interior and outer setting of gland, the hand wheel is fixed at stop screw topmost.

Furthermore, the contact surface of the valve body and the valve core is made of stainless steel.

Further, the inclination angle of the valve core is 25 degrees.

Further, the edge of the valve core is arc-shaped.

Furthermore, the valve also comprises sealing gaskets, wherein the sealing gaskets are fixed in grooves on the inner side of the valve core, and the number of the sealing gaskets is 1 or 2.

Compared with the prior art, the utility model has the advantages and positive effect as follows:

1. the utility model has the advantages of simple structure, simple to operate.

2. The utility model discloses a valve body and case contact surface are stainless steel, long service life is applicable to the high temperature medium, and application scope is wide.

3. The utility model discloses an inclination of case is 25 degrees, has reduced the impact force when the medium flows, has prolonged life, and the shape at the edge of case is the arc, has reduced the wearing and tearing when using.

4. The utility model discloses a sealed pad is fixed in the inboard recess of case, and the case is difficult for droing, and is sealed effectual.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a longitudinal cross-sectional view of the multi-functional hard-seal check valve of the present invention;

fig. 2 is an enlarged view of the structure of the valve core, the shoulder and the sealing gasket of the hard sealing multifunctional check valve of the present invention.

Reference numerals:

1. a valve body; 2. a valve core; 3. a valve shaft; 4. a nut; 5. a compression spring; 6. a valve cover; 7. a gland; 8. a limit screw; 9. a hand wheel; 10. a shoulder; 11. and a gasket.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being 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", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in figures 1 and 2, the utility model relates to a hard sealing multifunctional check valve, which belongs to the technical field of valve manufacturing, and comprises a valve body 1, a valve core 2, a valve shaft 3, a nut 4, a compression spring 5, a valve cover 6, a gland 7, a limit screw 8 and a hand wheel 9, wherein the valve shaft 3 and the valve core 2 are coaxially arranged from inside to outside in the valve body 1, the lower end of the valve shaft 3 is provided with a shoulder 10, the shoulder 10 is arranged at the superposed position of the uppermost ends of the valve shaft 3 and the valve core 2, the diameter of the valve shaft 3 is sequentially reduced from top to bottom, the nut 4 is in threaded connection with the lowermost end of the valve shaft 3, the valve shaft 3 and the compression spring 5 are coaxially arranged from inside to outside, the compression spring 5 is arranged on the valve core 2, the upper end of the compression spring 5 is fixedly connected with the gland 7 and the lower end is fixedly connected with the valve core 2, the limiting screw rod 8 and the gland 7 are coaxially arranged from inside to outside, and the hand wheel 9 is fixed at the uppermost end of the limiting screw rod 8.

Preferably, the contact surface of the valve body 1 and the valve core 2 is made of stainless steel, so that the valve is long in service life, suitable for high-temperature media and wide in application range.

Preferably, the inclination angle of the valve core 2 is 25 degrees, which reduces the impact force when the medium flows and prolongs the service life, and the edge of the valve core 2 is arc-shaped, which reduces the abrasion when in use.

Preferably, the gaskets 11 are fixed in the grooves on the inner side of the valve core 2, the number of the gaskets 11 is 1 or 2, and the sealing effect is good.

In the actual working process, when the hand wheel 9 is rotated to drive the limit screw 8 to move upwards, the check valve is opened, a medium flows through the check valve from left to right, the valve element 2 is opened, when the medium flows back, the medium generates acting force on the upper part of the valve element 2 and drives the spring to extend, so that the side surface of the valve element 2 is contacted with the inner side surface of the valve body 1 to form hard seal, the backflow of the medium is prevented, when the hand wheel 9 is rotated to drive the limit screw 8 to move downwards, and when the limit screw 8 is located at different positions, the opening degree of the valve element 2 is different, and the flow.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. Multi-functional check valve of hard seal, its characterized in that: comprises a valve body (1), a valve core (2), a valve shaft (3), a nut (4), a compression spring (5), a valve cover (6), a gland (7), a limit screw (8) and a hand wheel (9), wherein the valve shaft (3) and the valve core (2) are coaxially arranged inside the valve body (1) from inside to outside, a shoulder (10) is arranged at the lower end of the valve shaft (3), the shoulder (10) is arranged at the superposed position of the uppermost ends of the valve shaft (3) and the valve core (2), the diameters of the valve shaft (3) are sequentially reduced from top to bottom, the nut (4) is in threaded connection with the lowermost end of the valve shaft (3), the valve shaft (3) and the compression spring (5) are coaxially arranged from inside to outside, the compression spring (5) is arranged on the valve core (2), the upper end of the compression spring (5) is fixedly connected with the gland (7) and the lower end is fixedly connected with the valve core (2), the valve shaft (3) and the valve cover (6), limiting screw (8) are installed at valve shaft (3) the top, limiting screw (8) and gland (7) are coaxial and set up from inside to outside, hand wheel (9) are fixed at limiting screw (8) the top.

2. The hard-seal multi-function check valve of claim 1, wherein: the contact surface of the valve body (1) and the valve core (2) is made of stainless steel.

3. The hard-seal multi-function check valve of claim 1, wherein: the inclination angle of the valve core (2) is 25 degrees.

4. The hard-seal multi-function check valve of claim 1, wherein: the edge of the valve core (2) is arc-shaped.

5. The hard-seal multi-function check valve of claim 1, wherein: the valve core is characterized by further comprising sealing gaskets (11), wherein the sealing gaskets (11) are fixed in grooves in the inner side of the valve core (2), and the number of the sealing gaskets (11) is 1 or 2.