Recoil valve

Abstract

The utility model discloses a recoil valve, which belongs to the related technical field of valves, and comprises a valve body, a diaphragm and a guide rod which are arranged in the valve body, and a third interface connected to the axial direction of the valve body, the interior of the valve body is hollow and is provided with a plurality of open ports (including a first port and a second port); the first port and the second port are formed in the two axial sides of the valve body respectively. The diaphragm is arranged in the cavity and is hermetically connected with the corresponding inner wall in the cavity to form a control cavity; one end of the guide rod extends into the control cavity and is fixedly connected with the diaphragm, the other end of the guide rod extends into the third port in the axial direction of the valve body, the guide rod can move in the axial direction of the third port along with the deformation process of the diaphragm, and the other end of the guide rod is connected with a plugging structure. And synchronous cooperative operation of multiple valves does not need to be considered, maintenance is easy and convenient, and the method is suitable for internet remote control.

Description

Technical Field

[0001] The utility model belongs to the technical field related to valves, and particularly relates to a backflush valve. Background Art

[0002] The shallow multi-media filter is applicable to the water quality treatment of industrial and civil circulating water systems. Basically, a valve body made of nylon plastic material is used in the filter on the market. When connecting to the filter system, a support structure needs to be considered to ensure the strength of the entire filtration system. Currently, the general filter includes a filtration mode and a backwashing mode. There are many valve bodies assembled in the pipeline. When filtering or backwashing, many valves need to be controlled and operated, and it is necessary to consider the synchronous operation of multiple valves, resulting in a relatively complex pipeline and easy operation errors. Content of the Utility Model

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a backflush valve, which can meet the backflush requirements of the filter with a small number of valves, without considering the synchronous operation of multiple valves, is easy to maintain, and is applicable to Internet remote control.

[0004] The technical solution adopted by the utility model is as follows: A backflush valve includes a valve body, a third port connected to the valve body, a diaphragm and a guide rod arranged inside the valve body, and a plugging structure connected to the guide rod; the inside of the valve body is hollow and is provided with multiple groups of open ports, and the ports are respectively a first port and a second port; the first port and the second port are respectively arranged on both sides of the axial direction of the valve body and are located on the same horizontal plane, and the third port is axially connected to one end of the valve body and is communicated with the inside of the valve body; the diaphragm is arranged in the upper cavity of the inner cavity of the valve body, and the diaphragm is hermetically connected to the corresponding inner wall of the upper cavity to form a control cavity, and the control cavity is opposite to the position of the third port; one end of the guide rod extends into the control cavity and is fixedly connected to the diaphragm, and the other end extends axially into the third port along the valve body. The guide rod can move axially along the third port during the deformation process of the diaphragm, and a plugging structure is connected to the other end of the guide rod.

[0005] Further, a limit seat is arranged between the inner walls of the third port, the limit seat is provided with a through hole, and the corresponding end of the guide rod movably penetrates through the through hole, and the plugging structure is arranged on the limit seat.

[0006] Further, the plugging structure includes a compression spring arranged on the limit seat and a plugging member arranged on the compression spring. The plugging member is fixedly penetrated by the guide rod, and the plugging end of the plugging member has a corresponding working size.

[0007] Further, a limit convex ring is arranged on the inner wall of the communicating end of the third port with the cavity of the valve body. When the plugging end of the plugging member moves to the corresponding position, the edge of the plugging end abuts against the side wall of the limit convex ring.

[0008] Further, the first port, the second port, and the third port are respectively provided with connection ends for connecting pipelines.

[0009] Further, a pressure plate is arranged inside the diaphragm, and one end of the guide rod extending into the control cavity is fixedly connected to the pressure plate.

[0010] After adopting the above structure, the beneficial effects of the present utility model are as follows: A backflush valve proposed by the present utility model, through the arranged diaphragm, guide rod, and sealing structure, driven by compressed air, can open one passage in the valve body and close the other passage (and vice versa), realizing the rapid switching between the filtering mode and the backwashing mode of the filter, with convenient operation and control, suitable for remote control (manual, electric, remote pressure source control, etc. can be adopted), and reducing the number of valves used in the pipeline, without the need to consider the synchronous operation of multiple valves, and the maintenance is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, but do not constitute a limitation to the present utility model.

[0012] Figure 1 It is a schematic diagram of the overall structure of a backflush valve proposed by the present utility model;

[0013] Figure 2 It is a schematic diagram of the internal structure of a backflush valve proposed by the present utility model;

[0014] Figure 3 It is a schematic diagram of the usage state of a backflush valve proposed by the present utility model (filtering mode of the filter: the arrow indicates the water flow direction);

[0015] Figure 4 It is a schematic diagram of the usage state of a backflush valve proposed by the present utility model (backwashing mode of the filter: the arrow indicates the water flow direction).

[0016] In the drawings: 1. Valve body, 2. First port, 3. Second port, 4. Third port, 5. Diaphragm, 6. Control cavity, 7. Guide rod, 8. Limit seat, 9. Compression spring, 10. Sealing member, 11. Limit convex ring, 12. Pressure plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments; based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0019] As Figure 1 - Figure 2 shown, a recoil valve includes a valve body 1, a diaphragm 5 and a guide rod 7 disposed inside the valve body 1, and a third port 4 connected to the valve body 1; an upper cover is provided at the top of the valve body 1, and the upper cover is installed at the top of the valve body 1 by bolts; the inside of the valve body 1 is hollow and provided with multiple groups of open ports, which are respectively a first port 2 and a second port 3; the first port 2 and the second port 3 are respectively disposed on both sides of the axial direction of the valve body 1, and the third port 4 is axially connected to one end of the valve body 1, and the third port 4 and the corresponding end of the valve body 1 are installed by bolts, and the connection is a sealed connection; the first port 2 and the second port 3 are connected and communicate with each other between the upper cavities of the inner cavity of the valve body 1 to form a first passage, and the second port 3 and the third port 4 communicate with each other in the lower cavity of the inner cavity of the valve body 1 to form a second passage; the first port 2, the second port 3 and the third port 4 are respectively provided with connection ends for connecting pipelines, and the connection ends can be in the form of groove connection, threaded connection, etc. After connecting the pipelines, the first pipeline can be cut off to open the second pipeline, or the second pipeline can be cut off to open the first pipeline, which is convenient for switching between the filtration mode and the flushing mode without the need to control a large number of valves for operation. And the valve body 1 is made of metal material, which can avoid the problems of water absorption deformation of the nylon plastic valve body 1 affecting the stability of the rigid dimensions and electrical properties, reduction of mechanical strength, and easy oxidation of the material. In addition, when installing the metal material valve body 1, there is no need to consider the support structure to ensure the strength of the filtration system.

[0020] In some preferred embodiments, the diaphragm 5 is disposed in the upper cavity of the cavity, and the diaphragm 5 is hermetically connected to the corresponding inner wall in the upper cavity (the inner side of the upper cover of the valve body 1) to form a control cavity 6, and the control cavity 6 is opposite to the position of the third port 4; one end of the guide rod 7 extends into the control cavity 6 and is fixedly connected to the diaphragm 5 (the connection between the guide rod 7 and the diaphragm 5 is sealed), and the other end extends axially into the third port 4 along the valve body 1. Here, preferably, a pressure plate 12 is disposed inside the diaphragm 5, and one end of the guide rod 7 located in the control cavity 6 is fixedly connected to the pressure plate 12; the guide rod 7 can move axially along the third port 4 during the deformation process of the diaphragm 5, and a plugging structure is connected to the other end of the guide rod 7.

[0021] Specifically, a limiting seat 8 is arranged between the inner walls of the third port 4. The limiting seat 8 can be Y-shaped. A through hole is arranged in the middle part of the limiting seat 8. The corresponding end of the guiding rod 7 movably penetrates through the through hole. The blocking structure is arranged on the limiting seat 8. Further, the blocking structure includes a compression spring 9 arranged on the limiting seat 8 and a blocking member 10 arranged on the compression spring 9. The blocking member 10 is fixedly penetrated by the corresponding end of the guiding rod 7. The compression spring 9 has corresponding elastic deformation force, deforms when compressed, and resets when the force is removed. The blocking end of the blocking member 10 has corresponding working dimensions. Here, preferably, a limiting convex ring 11 is arranged on the inner wall of the third port 4 at the end communicating with the cavity of the valve body 1. When the blocking end of the blocking member 10 moves to the corresponding position, the edge of its blocking end abuts against the side wall of the limiting convex ring 11. When abutting against the side wall of the limiting convex ring 11, the communication end between the third port 4 and the cavity is sealed. The outer diameter of the blocking end of the blocking member 10 gradually increases from the inside of the cavity to the outside along the axial direction of the third port 4.

[0022] It should be noted that the diaphragm 5 has corresponding deformation ability. When the control cavity 6 is pressurized, the diaphragm 5 presses down, cutting off the first passage. At the same time, the guiding rod 7 and the blocking member 10 move downward along with the diaphragm 5. At this time, the compression spring 9 is pressed down. When the control cavity 6 is depressurized, the compression spring 9 resets, the diaphragm 5 resets, the guiding rod 7 moves upward and resets along with the compression spring 9 and the diaphragm 5, and the blocking member 10 abuts against the side wall of the limiting convex ring 11, cutting off the second passage.

[0023] In addition, the outer diameter of the end of the guiding rod 7 connected to the blocking structure is smaller than the outer diameter of the main body of the guiding rod 7. A limiting working surface is formed at the outer diameter change. A step connected to the limiting working surface is arranged at the connection of the blocking member 10 and the guiding rod 7 to improve the connection stability between the guiding rod 7 and the blocking member 10.

[0024] The specific use is as follows: The inside of the valve body 1 is hollow and is provided with multiple groups of open ports, which are the first port 2 and the second port 3 respectively. The first port 2 and the second port 3 are arranged on both sides of the valve body 1 in the axial direction. The third port 4 is axially connected to one end of the valve body 1. A diaphragm 5, a guide rod connected to the diaphragm 5, and a blocking structure connected to the guide rod are arranged inside the valve body 1.

[0025] When the control cavity 6 is pressurized, the diaphragm 5 presses down, cutting off the first passage formed between the first port 2 and the second port 3. At this time, the guiding rod 7 moves along the axial direction of the third port 4 along with the downward pressure of the diaphragm 5. The blocking member 10 moves downward along with the guiding rod 7 and presses down the compression spring 9. The blocking member 10 leaves the limiting convex ring 11, opening the second passage formed between the second port 3 and the third port 4.

[0026] When the control chamber 6 is depressurized, the compression spring 9 resets, the diaphragm 5 rises, the guide rod 7 moves axially into the cavity along the third port 4, the sealing member 10 moves upward and abuts against the inner side of the limiting convex ring 11 to close the third port 4, that is, cut off the passage between the second port 3 and the third port 4, and open the passage between the first port 2 and the second port 3.

[0027] The backflush valve of the present application is applied to a filter. Among them, the three ports of the backflush valve, the water inlet (the first port 2) is connected to the water source side, the water outlet / common end (the second port 3) is connected to the filter water inlet, and the sewage outlet (the third port 4) is connected to the sewage pipe. Manual, electric, remote pressure source control and other operation methods can be adopted to change the internal passage state of the valve (the second port 3 is communicated with the third port 4) to enter the backflush mode. After the backflush process ends, it returns to the normal filtration mode (the first port 2 is communicated with the second port 3) according to the instruction. The valve of the present application is driven by pipeline pressure or compressed air.

[0028] Specifically, referring to Figure 3 , in the filtration mode, the first port 2 of valve one is communicated with the second port 3, the second port 3 of valve two is communicated with the third port 4, the first port 2 of valve one is connected to the external water source supply pipeline, the external water source enters the filter, and the filtered water body is discharged from the water outlet;

[0029] Referring to Figure 4 , in the backflush mode, the second port 3 of valve one is communicated with the third port 4, the first port 2 of valve two is communicated with the second port 3, the first port 2 of valve two is connected to the external water source supply pipeline, the external water source enters the filter, and the water body after flushing the filter is discharged from the sewage outlet.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. All in all, if those of ordinary skill in the art are inspired by it and design similar structural ways and embodiments without creative efforts without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A recoil valve, characterized in that: include: The valve body is hollow inside and is provided with a plurality of open ports, wherein the ports are respectively a first port and a second port, and the first port and the second port are respectively arranged on both sides of the axial direction of the valve body; A third port is axially connected to one end of the valve body and communicates with the interior of the valve body; A diaphragm is arranged in the upper cavity of the valve body, the diaphragm is sealed and connected with the corresponding inner wall in the upper cavity to form a control cavity, and the control cavity is opposite to the third port; The guide rod has one end extending into the control cavity and fixedly connected to the diaphragm, and the other end extending into the third port along the axial direction of the valve body. The guide rod can move along the axial direction of the third port following the deformation process of the diaphragm, and the other end of the guide rod is connected to a blocking structure.

2. A recoil valve according to claim 1, characterized in that: A limit seat is arranged between the inner walls of the third port, a through hole is arranged on the limit seat, a corresponding end of the guide rod movably passes through the through hole, and the blocking structure is arranged on the limit seat.

3. A recoil valve according to claim 2, characterized in that: The blocking structure includes a compression spring arranged on a limiting seat and a blocking piece arranged on the compression spring. The blocking piece is fixedly penetrated by a guide rod, and a blocking end of the blocking piece has a corresponding operating size.

4. A recoil valve according to claim 3, characterized in that: The third port is provided with a limiting convex ring on the inner wall of the end communicating with the valve body cavity. When the blocking end of the blocking member moves to a corresponding position, the edge of the blocking end abuts against the side wall of the limiting convex ring.

5. A recoil valve according to claim 1, characterized in that: The first port, the second port and the third port are respectively provided for connecting the connection ends of the pipeline.

6. A recoil valve according to claim 1, characterized in that: A pressure plate is arranged inside the diaphragm, and one end of the guide rod extending into the control cavity is fixedly connected with the pressure plate.

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