CN211039815U

CN211039815U - Check valve with drainage device

Info

Publication number: CN211039815U
Application number: CN201922275471.4U
Authority: CN
Inventors: 石敬永; 沈克勤
Original assignee: Suzhou Lirui Fluid Control Equipment Co ltd
Current assignee: Suzhou Lirui Fluid Control Equipment Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-07-17
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a check valve with drainage device, which comprises a valve body, the top of valve body is equipped with the valve gap, the top of valve gap is equipped with the plug screw, the internal connection of valve gap has the valve clack, the bottom of valve body is equipped with the base, the inside of base is connected with the valve rod through O type circle, the bottom of valve rod is equipped with the handle. This check valve with drainage device through install manual emergent opening mechanism additional in conventional check valve body bottom, reaches the function of initiative drainage under the emergency condition, need not to dismantle the pipeline, has easy operation convenience, characteristics with low costs, and the pressure release function that ordinary check valve can't be realized to simple high efficiency, and the whole pressure release of rivers can not appear the condition of seriously leaking outward inside the pipeline, and easy operation is convenient, need not extra maintenance.

Description

Check valve with drainage device

Technical Field

The utility model relates to a check valve technical field specifically is a check valve with drainage device.

Background

Check valves, an important component of a piping system, generally used for preventing a reverse flow of water, are commonly installed in water supply and drainage pipelines or industrial water supply pipelines. When the water pump is turned on upstream of the check valve, the water pressure will automatically open the valve and the water will flow downstream through the check valve. When the upstream pump is shut down, the return flow from the downstream pipe will automatically close the check valve, which will block all the return flow. Conventional check valves are automatic valves, do not need additional power, rely on the power that rivers self provided to open or close the valve.

The existing check valve can be used for emptying water stored in a pipeline under a special working condition, and the conventional check valve is not provided with an additional driving mechanism, so that the check valve cannot be normally opened to discharge water, troubles are brought to users, and the special requirements of the users are difficult to meet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide a check valve with drainage device has solved the problem that proposes among the background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a check valve with drainage device, includes the valve body, the top of valve body is equipped with the valve gap, the top of valve gap is equipped with the plug screw, the internal connection of valve gap has the valve clack, the bottom of valve body is equipped with the base, the inside of base is connected with the valve rod through O type circle, the bottom of valve rod is equipped with the handle.

Preferably, the sealing surface of the valve clack is 45 degrees with the pipeline direction of the valve body, and the maximum opening and closing angle of the valve clack is 35 degrees.

Preferably, the valve cover is fixedly installed on the upper portion of the valve body through bolts and nuts, and a concave cavity is formed in the left side of the inner cavity of the valve cover.

Preferably, the top of the valve cover is provided with a plug screw through NPT threaded connection, the bottom of the valve body is provided with a base along the direction of 45 degrees of the flow channel, and the base is connected with the valve body through NPT threaded connection.

Preferably, the end part of the valve rod is provided with a round hole, and a handle is installed in the round hole.

(III) advantageous effects

The utility model provides a check valve with drainage device. The method has the following beneficial effects:

this check valve with drainage device through install manual emergent opening mechanism additional in conventional check valve body bottom, reaches the function of initiative drainage under the emergency condition, need not to dismantle the pipeline, has easy operation convenience, characteristics with low costs, and the pressure release function that ordinary check valve can't be realized to simple high efficiency, and the whole pressure release of rivers can not appear the condition of seriously leaking outward inside the pipeline, and easy operation is convenient, need not extra maintenance.

Drawings

FIG. 1 is a schematic view of a fully closed check valve with a drainage device according to the present invention;

fig. 2 is a schematic view of the open state structure of the check valve with the drainage device of the present invention.

In the figure: the valve comprises a valve body 1, a valve clack 2, a plug screw 3, a handle 4, a valve rod 5, a base 6, an O-shaped ring 7 and a valve cover 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, an embodiment of the present invention provides a technical solution: the utility model provides a check valve with drainage device, includes valve body 1, the top of valve body 1 is equipped with valve gap 8, valve gap 8's top is equipped with plug screw 3, valve gap 8's internal connection has valve clack 2, the bottom of valve body 1 is equipped with base 6, the inside of base 6 is connected with valve rod 5 through O type circle 7, the bottom of valve rod 5 is equipped with handle 4.

The sealing surface of the valve clack 2 and the pipeline direction of the valve body 1 are 45 degrees, the maximum opening and closing angle of the valve clack 2 is a golden angle of 35 degrees, the valve clack has the characteristics of small flow resistance and low opening and closing stroke, huge impact noise cannot be generated when the valve clack 2 runs to a full-closed position, and the whole valve runs quietly.

The valve cover 8 is fixedly installed on the upper portion of the valve body 1 through bolts and nuts, a concave cavity is formed in the left side of the inner cavity of the valve cover 8, and the valve clack 2 is accurately positioned on the sealing surface of the valve body 1.

The top of the valve cover 8 is provided with the plug screw 3 through NPT threaded connection, the bottom of the valve body 1 is provided with the base 6 along the direction of 45 degrees of the flow channel, the base 6 is connected with the valve body 1 through NPT threaded connection, and the sealing performance is high.

The end part of the valve rod 5 is provided with a round hole, and a handle 4 is arranged in the round hole and used for rotating the valve rod 5 to enable the valve rod 5 to be screwed in or withdrawn from the inner cavity of the valve body 1.

The working principle is as follows: in a daily working state, when the valve clack 2 is in a fully closed position, the end part of the valve rod 5 must keep a certain safety distance with the valve clack 2 to ensure that the valve can be completely closed, the situation that the valve clack 2 cannot reach the fully closed position due to the blocking of the valve rod 5 cannot occur, and the valve can normally perform actions such as automatic opening or automatic closing;

in special situations, pipeline pressure relief is needed, the handle 4 can be rotated clockwise at the moment, the valve rod 5 and the base 6 are in threaded transmission, the valve rod 5 is pushed to be screwed into the inner cavity of the valve body 1, the end part of the valve rod 5 is in contact with the valve clack 2 and then overcomes the pressure of water flow to jack the valve clack 2 gradually, a gap is generated between the valve clack 2 and the valve seat of the valve body 1 at the moment, the water flow flows back, pipeline pressure relief is carried out, the opening degree of the valve clack 2 can be increased by further rotating the handle;

when the water flow is exhausted and the pressure in the pipeline is completely removed, the handle 4 needs to be rotated anticlockwise to unscrew the valve rod 5 from the valve cavity until the valve clack 2 returns to the full-closed position, a certain safety distance is kept between the valve rod 5 and the valve clack 2, and after the pipeline is normal, the check valve can be automatically opened or closed normally.

The utility model discloses a valve body 1, valve clack 2, plug screw 3, handle 4, valve rod 5, base 6, O type circle 7, valve gap 8, the part is general standard component or the part that technical staff in this field knows, its structure and principle all can be known or can be known through conventional experimental method for this technical staff, the problem that the utility model solves is that current check valve need empty the interior deposit water of pipeline under special operating mode, because conventional check valve does not have extra actuating mechanism, can't normally open the check valve and drain water, bring the puzzlement for the user, be difficult to satisfy the demand scheduling problem of check valve, the utility model discloses an the intercombination of above-mentioned parts, through install manual emergent opening mechanism additional in conventional check valve body bottom, reach the function of initiative drainage under the emergency state, need not to dismantle the pipeline, have easy operation convenience, characteristics with low costs, the pressure release function that ordinary check valve can't be realized is realized to simple high efficiency, and the whole pressure release of rivers can not appear the condition of serious hourglass inside the pipeline, and easy operation is convenient, need not extra maintenance.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a check valve with drainage device which characterized in that: including valve body (1), the top of valve body (1) is equipped with valve gap (8), the top of valve gap (8) is equipped with plug screw (3), the internal connection of valve gap (8) has valve clack (2), the bottom of valve body (1) is equipped with base (6), the inside of base (6) is connected with valve rod (5) through O type circle (7), the bottom of valve rod (5) is equipped with handle (4).

2. The check valve with drain of claim 1, wherein: the sealing surface of the valve clack (2) and the pipeline direction of the valve body (1) are 45 degrees, and the maximum opening and closing angle of the valve clack (2) is 35 degrees.

3. The check valve with drain of claim 1, wherein: the valve cover (8) is fixedly arranged on the upper portion of the valve body (1) through bolts and nuts, and a concave cavity is formed in the left side of the inner cavity of the valve cover (8).

4. The check valve with drain of claim 1, wherein: plug screw (3) are installed through NPT threaded connection at valve gap (8) top, base (6) are installed along 45 directions of runner to valve body (1) bottom, base (6) pass through NPT threaded connection with valve body (1).

5. The check valve with drain of claim 1, wherein: the end part of the valve rod (5) is provided with a round hole, and a handle (4) is installed in the round hole.