Regulator for water escape valve of backflow preventer

Abstract

The utility model discloses a regulator for a water escape valve of a backflow preventer, which belongs to the technical field of regulating structures of water escape valves and comprises a regulator seat connected with a water escape valve, an L-shaped water passing groove is arranged in the regulator seat, the section of the groove is circular, a threaded hole is arranged on one side of the regulator seat, and a sleeve and a regulating rod are in threaded connection with the regulator seat. And the adjusting rod is arranged in the adjuster seat and the sleeve in a penetrating manner and is in threaded connection with the sleeve, and when the adjusting rod is screwed, the adjusting rod can do front-back telescopic movement relative to the adjuster seat and the sleeve. According to the technical scheme, when a valve plug in the water escape valve is clamped, water leakage occurs, and self-stopping cannot be achieved, the adjusting rod is screwed, the adjusting rod can move forwards relative to the adjuster base and the sleeve till the adjusting rod abuts against the valve plug to reset the valve plug, then the function of forcibly closing the water escape valve is achieved, and when the adjusting rod is far away from the water escape valve, the forcible closing effect on the valve plug is relieved; the valve plug can be opened to work again under the action of water flow pressure.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drain valve adjusting structure technical field, specifically is a backflow preventer drain valve regulator. BACKGROUND

[0002] The backflow preventer is also called a pollution prevention isolation valve, and its core structure includes a water inlet check valve, a water outlet check valve and an automatic drain valve arranged between the two. The principle of the backflow preventer drain valve is that when the medium flows through the water inlet check valve, the pressure is reduced due to mechanical resistance and flow head loss, so that the inlet pressure is higher than the pressure in the drain valve cavity. When the pressure difference between the inlet and the drain valve cavity is less than a certain value, the pressure on the upper part of the drain valve diaphragm is less than the pressure of the drain valve cavity and the spring, and the drain valve is automatically opened to discharge the backflow medium outside the pipe. At the same time, a large amount of air enters the valve cavity to form an air isolation to prevent the medium from flowing backward. When the pressure difference is greater than a certain value, the drain valve is automatically closed.

[0003] During the operation of the backflow preventer, the drain valve will frequently switch between opening and closing, that is, the drain valve maintains a relatively frequent movement state during operation. As the working time increases, the wear and deformation of the structure inside the valve may become more and more serious, which may cause the valve plug to be stuck and unable to move smoothly during resetting, that is, the drain valve cannot be closed automatically, and further, water leakage occurs and cannot be stopped automatically, affecting the continued use of the overall structure. Therefore, the backflow preventer drain valve regulator is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a backflow preventer drain valve regulator. The drain valve adjusting structure is equipped with a forced closing mechanism, which is composed of an adjusting rod and a sleeve. When the drain valve plug is stuck and cannot be reset, the adjusting rod is twisted to move forward relative to the regulator seat and the sleeve until it is reset against the valve plug, thereby forcing the drain valve to close. The technical problem of water leakage and inability to stop automatically when the drain valve plug is stuck and cannot be reset in the prior art is solved, thereby affecting the continued use of the overall structure.

[0005] The technical solution adopted by the embodiment of the application to solve the technical problem is:

[0006] The utility model provides a backflow preventer drain valve regulator, including the regulator seat with drain valve, its inside is provided with L-shaped water passage, the section of the groove is round, and the one side of regulator seat is provided with threaded hole, wherein the sleeve is connected with threaded hole, the adjusting rod is arranged in the regulator seat and sleeve and is connected with sleeve threadedly, when the adjusting rod is screwed, it will do the front and back telescopic movement relative to the regulator seat, sleeve, when the valve plug in drain valve is stuck and cannot stop, the adjusting rod is screwed, it will do the front movement relative to the regulator seat, sleeve, until the valve plug is reset to the function of forcedly closing drain valve.

[0007] In a possible implementation, the sleeve is composed of an outer threaded cylinder and an inner threaded cylinder, wherein the inner wall of the outer threaded cylinder is smooth, the outer wall is provided with threads, the outer threaded cylinder is screwed with the regulator seat, and the inner wall of the inner threaded cylinder is provided with threads.

[0008] In a possible implementation, the adjusting rod is composed of a working rod and a threaded rod, wherein the threaded rod is screwed with the inner threaded cylinder, and a screwing opening is provided at the outer end of the threaded rod, in use, a sheet structure is inserted into the screwing opening, and then the adjusting rod is screwed to rotate as a whole, since the threaded rod is screwed with the inner threaded cylinder, the working rod can do the front and back telescopic movement, when the working rod abuts against the valve plug of the drain valve, the valve plug is forced to close, and when the working rod is away from the drain valve, the valve plug can be opened under the action of pressure.

[0009] In a possible implementation, a plurality of clamping grooves are provided at the junction of the working rod and the threaded rod, which are used to install a sealing rubber ring, after the sealing rubber ring is installed, the gap between the adjusting rod and the sleeve can be sealed to prevent water from flowing out of the sleeve through the gap.

[0010] In a possible implementation, the regulator seat comprises a base, the upper side of the base is provided with a first threaded interface, the side surface of the base is provided with a second threaded interface coaxially arranged with the sleeve, wherein the second threaded interface is screwed with a connecting cover, which is used to press the end of the external pipeline connected with the second threaded interface, and the above structure provides a necessary structural basis for the sealed connection of the regulator seat with the drain valve and the external pipeline.

[0011] In summary, the utility model has the following beneficial technical effects:

[0012] The drain valve adjusting structure is equipped with a forced closing mechanism, which is composed of an adjusting rod and a sleeve, when the valve plug in the drain valve is stuck and cannot stop the leakage, the adjusting rod is twisted, which will move forward relative to the adjusting seat and the sleeve until it stops the valve plug to reset, thereby playing a role in forcibly closing the drain valve, when the adjusting rod is away from the drain valve, the forced closing effect on the valve plug is removed, and the valve plug can be opened again under the action of water pressure;

[0013] In addition, a plurality of clamping grooves are arranged at the junction of the working rod and the threaded rod, which are used to install a sealing rubber ring, after the sealing rubber ring is installed, the gap between the adjusting rod and the sleeve can be sealed to prevent water from flowing out of the sleeve through the gap. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application. In the drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 It is a schematic diagram of the structure of the present application;

[0017] Figure 3 It is a sectional view of the overall structure of the present application.

[0018] In the drawings: 1, adjusting seat; 11, base; 12, first threaded interface; 13, second threaded interface; 2, sleeve; 21, outer threaded cylinder; 22, inner threaded cylinder; 3, adjusting rod; 31, working rod; 32, threaded rod; 33, twisting opening; 34, clamping groove; 4, connecting cover. DETAILED DESCRIPTION

[0019] The technical solution in the embodiments of the present application is to solve the problems in the above background art, and the general idea is as follows:

[0020] As shown in the drawings, Figure 1 - Figure 3 The drain valve adjusting device of the backflow preventer provided in the present embodiment comprises an adjusting seat 1 connected with a drain valve, an L-shaped water passage is arranged in the adjusting seat 1, the cross section of the water passage is circular, and a threaded hole is arranged on one side of the adjusting seat 1, a sleeve 2 is connected with the threaded hole, an adjusting rod 3 is arranged in the adjusting seat 1 and the sleeve 2 and is connected with the sleeve 2 in a threaded manner, when the adjusting rod 3 is twisted, it will move forward and backward relative to the adjusting seat 1 and the sleeve 2, when the valve plug in the drain valve is stuck and cannot stop the leakage, the adjusting rod 3 is twisted, which will move forward relative to the adjusting seat 1 and the sleeve 2 until it stops the valve plug to reset, thereby playing a role in forcibly closing the drain valve.

[0021] The sleeve 2 is composed of two parts of an outer threaded cylinder 21 and an inner threaded cylinder 22, wherein the inner wall of the outer threaded cylinder 21 is smooth, the outer wall is provided with threads, the outer threaded cylinder 21 is screwed with the regulator base 1, and the inner wall of the inner threaded cylinder 22 is provided with threads; the above structure can realize the threaded connection between the sleeve 2 and the regulator base 1, and provide necessary structure basis for the threaded connection between the adjusting rod 3 and the sleeve 2; correspondingly, the adjusting rod 3 is composed of two parts of a working rod 31 and a threaded rod 32, wherein the threaded rod 32 is screwed with the inner threaded cylinder 22, and a screwing opening 33 is formed at the outer end of the threaded rod 32; in use, a sheet structure is inserted into the screwing opening 33, and then the adjusting rod 3 is screwed to rotate as a whole; since the threaded rod 32 is screwed with the inner threaded cylinder 22, the working rod 31 can be extended and retracted forward and backward; when the working rod 31 abuts against the valve plug of the drain valve, the valve plug is forced to close; when the working rod 31 is away from the drain valve, the valve plug can be opened under the action of water pressure.

[0022] As shown in Figure 2 - Figure 3 The junction of the working rod 31 and the threaded rod 32 is provided with a plurality of clamping grooves 34, which are used to install a sealing rubber ring; after the sealing rubber ring is installed, the gap between the adjusting rod 3 and the sleeve 2 can be sealed to prevent water from flowing out of the sleeve 2 through the gap.

[0023] As shown in Figure 2 The regulator base 1 comprises a base 11, the upper side of which is provided with a first threaded interface 12, and the side surface thereof is provided with a second threaded interface 13 coaxially arranged with the sleeve 2; wherein the second threaded interface 13 is screwed with a connecting cover 4, which is used to press the end of the external pipeline connected with the second threaded interface 13; the above structure provides necessary structure basis for the sealed connection of the regulator base 1 with the drain valve and the external pipeline.

[0024] The use principle and use process of the utility model are as follows:

[0025] The drain valve adjusting structure is provided with a forced closing mechanism, which is composed of the adjusting rod 3 and the sleeve 2; when the valve plug in the drain valve is stuck and cannot be stopped by itself, a sheet structure is inserted into the screwing opening 33 of the adjusting rod 3, and then the adjusting rod 3 is screwed to rotate as a whole; since the threaded rod 32 is screwed with the inner threaded cylinder 22, the working rod 31 can be extended and retracted forward and backward; when the working rod 31 moves forward, it can abut against the valve plug of the drain valve, and the valve plug is forced to close; when the working rod 31 moves backward, it is away from the drain valve, the forced closing effect on the valve plug is removed, and the valve plug can be opened under the action of water pressure again.

[0026] In addition, a plurality of clamping grooves 34 are formed at the joint of the working rod 31 and the threaded rod 32, which are used to install a sealing rubber ring.

[0027] Finally, it should be noted that: apparently, the above examples are merely for clearly illustrating the utility model, and not limited to the implementation. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to exhaust all the implementation. The obvious changes or variations derived from it are still within the protection scope of the utility model.

Claims

1. A backflow prevention device drain valve regulator, characterized in that, include: The regulator seat (1) is connected to the drain valve. An L-shaped water passage groove is provided inside the regulator seat (1). The groove has a circular cross-section. A threaded hole is provided on one side of the regulator seat (1), in which a sleeve (2) is threadedly connected. The adjusting rod (3) passes through the regulator seat (1) and the sleeve (2) and is threadedly connected to the sleeve (2). When the adjusting rod (3) is turned, it will move back and forth relative to the regulator seat (1) and the sleeve (2). When the valve body inside the drain valve cannot reset itself, the adjusting rod (3) moves forward to abut against the valve body to reset it, thereby closing the drain valve.

2. The backflow preventer drain valve regulator according to claim 1, characterized in that: The sleeve (2) is composed of two parts connected together: an external threaded sleeve (21) and an internal threaded sleeve (22). The inner wall of the external threaded sleeve (21) is smooth and the outer wall is threaded. The external threaded sleeve (21) is threaded with the adjuster seat (1), and the inner wall of the internal threaded sleeve (22) is threaded.

3. A backflow preventer drain valve regulator according to claim 2, characterized in that: The adjusting rod (3) consists of two parts: a working rod (31) and a threaded rod (32). The threaded rod (32) is threadedly connected to the internal threaded cylinder (22), and a screwing port (33) is provided at the outer end of the threaded rod (32).

4. A backflow prevention device drain valve regulator according to claim 3, characterized in that: Several slots (34) are provided at the junction of the working rod (31) and the threaded rod (32) for installing the sealing rubber ring.

5. A backflow preventer drain valve regulator according to claim 1, characterized in that: The regulator seat (1) includes a base (11), which has a first threaded interface (12) on its upper side and a second threaded interface (13) arranged coaxially with the sleeve (2) on its side. The second threaded interface (13) is threaded with a connecting cover (4), which is used to cover the end of the external pipeline connected to the second threaded interface (13).

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