Backwash stop valve

Abstract

The utility model belongs to the technical field of stop valves and discloses a backwashing stop valve which comprises a valve body, a cleaning opening is formed in the bottom of the valve body, a cleaning box is arranged at the bottom of the cleaning opening, a water inlet is formed in the right side of the bottom of the cleaning box, and a water outlet is formed in the left side of the bottom of the cleaning box. Cover bodies are arranged at one end of the water inlet and one end of the water outlet, a high-pressure water column is introduced into the water inlet and is introduced into the stop valve through the cleaning box and the cleaning opening to achieve cleaning, the high-pressure water column falls into the cleaning box after being cleaned, sewage is discharged through the water outlet, a valve body of the stop valve does not need to be unscrewed during cleaning, and convenience is brought to cleaning work. By pressing down a clamping block, stretching out and drawing back a spring, enabling the spring to enter a groove from a clamping groove, separating the clamping block from the clamping groove, and then separating a connecting pipe from a cleaning opening, the interior of the cleaning box can be cleaned and maintained regularly, water pressure can be increased through an arranged connecting plate and a through hole, and the sealing performance after the connecting pipe and the cleaning opening are connected is improved through an arranged sealing ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of globe valves, and particularly relates to a backwashing globe valve. Background Technique

[0002] A globe valve, also known as a stop valve, belongs to a forced-sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. When the medium enters the valve from below the valve flap, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem needs to be large, otherwise the valve stem will be bent. It is divided into three types according to the connection method: flange connection, threaded connection, and welded connection. Since the appearance of self-sealing valves, the flow direction of globe valves has changed to enter the valve cavity from above the valve flap. At this time, under the action of the medium pressure, the force to close the valve is small, and the force to open the valve is large, and the diameter of the valve stem can be correspondingly reduced. At the same time, under the action of the medium, this type of valve is also relatively tight. China's valve "Three Standardizations" once stipulated that the flow direction of globe valves should all be from top to bottom. When the globe valve is opened, when the opening height of the valve flap reaches 25% - 30% of the nominal diameter, the flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve flap.

[0003] Currently, most of the existing globe valves need to be disassembled for cleaning. During the disassembly and cleaning process, the parts in the valve may be damaged, and the valve of the globe valve may need to be unscrewed, making the cleaning very inconvenient. For this reason, we propose a backwashing globe valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide a backwashing globe valve to solve the problem that most of the existing globe valves need to be disassembled for cleaning, the parts in the valve may be damaged during the disassembly and cleaning process, and the valve of the globe valve may need to be unscrewed, making the cleaning very inconvenient as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A backwashing globe valve, including a valve body, a cleaning port is opened at the bottom of the valve body, the cleaning port extends into the valve body, a cleaning box is arranged at the bottom of the cleaning port, the cleaning box is clamped at the bottom of the cleaning port, a water inlet is arranged on the right side of the bottom of the cleaning box, a water outlet is arranged on the left side of the bottom of the cleaning box, both the water inlet and the water outlet extend into the cleaning box, and a cover body is arranged at one end of both the water inlet and the water outlet.

[0006] Preferably, a clamping groove is arranged on both the front and rear sides of the cleaning port, a connecting pipe is arranged on the top of the cleaning box, a clamping block is movably connected to both the front and rear sides of the connecting pipe, the clamping block is adapted to the clamping groove, and the clamping block is clamped inside the clamping groove.

[0007] Preferably, there is a groove on both the front and rear sides of the connecting pipe. A spring is arranged inside the groove. One end of the spring is fixedly connected inside the groove, and the other end of the spring is fixedly connected to one end of the clamping block.

[0008] Preferably, a connecting plate is fixedly connected to the inner top of the cleaning port. Through holes are arranged inside the connecting plate, and the number of the through holes is several.

[0009] Preferably, an external thread is arranged on the outer side of the cover body. Internal threads are arranged inside both the water inlet and the water outlet, and the internal threads are adapted to the external thread.

[0010] Preferably, a sealing ring is arranged on the outer side above the cleaning box, and the sealing ring is attached to the inner wall of the cleaning port.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By removing the cover body from the water inlet and the water outlet respectively, and then introducing a high-pressure water column into the water inlet, the cleaning is realized by passing through the cleaning box and the cleaning port into the stop valve. After cleaning, it falls into the cleaning box, and the sewage is discharged through the water outlet. When cleaning, it is not necessary to unscrew the valve of the stop valve, which brings convenience to the cleaning work.

[0013] 2. By pressing the clamping block, the spring expands and contracts, enters from the clamping groove into the groove inside, separates the clamping block from the clamping groove, and then disassembles the connecting pipe from the cleaning port. The inside of the cleaning box can be cleaned and maintained regularly. The arranged connecting plate and through holes can increase the water pressure, the arranged sealing ring improves the sealing performance after the connection between the connecting pipe and the cleaning port, and the arranged external thread and internal thread improve the stability after the connection between the cover body and the water inlet and the water outlet. Description of the Drawings

[0014] Figure 1 is the overall structural schematic diagram of the present utility model;

[0015] Figure 2 is the disassembled structural schematic diagram of the cleaning box and the cleaning port of the present utility model;

[0016] Figure 3 is the disassembled structural schematic diagram of the clamping block and the groove of the present utility model;

[0017] Figure 4 is the disassembled structural schematic diagram of the cover body and the water inlet pipe of the present utility model.

[0018] In the figure: 1. Valve body; 2. Cleaning port; 3. Cleaning box; 4. Water inlet; 5. Water outlet; 6. Cover body; 7. Clamping groove; 8. Connecting pipe; 9. Clamping block; 10. Groove; 11. Spring; 12. Connecting plate; 13. Through hole; 14. External thread; 15. Internal thread; 16. Sealing ring. Detailed implementation mode

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4 , the present utility model provides a technical solution for a backwashing globe valve: including a valve body 1, a cleaning port 2 is opened at the bottom of the valve body 1, the cleaning port 2 extends into the valve body 1, a cleaning box 3 is provided at the bottom of the cleaning port 2, the cleaning box 3 is clamped at the bottom of the cleaning port 2, a water inlet 4 is provided on the right side of the bottom of the cleaning box 3, a water outlet 5 is provided on the left side of the bottom of the cleaning box 3, both the water inlet 4 and the water outlet 5 extend into the cleaning box 3, and a cover body 6 is provided at one end of both the water inlet 4 and the water outlet 5.

[0021] Specifically, a clamping groove 7 is provided on both the front and rear sides of the cleaning port 2, a connecting pipe 8 is provided at the top of the cleaning box 3, a clamping block 9 is movably connected to both the front and rear sides of the connecting pipe 8, the clamping block 9 is adapted to the clamping groove 7, and the clamping block 9 is clamped inside the clamping groove 7.

[0022] Specifically, a groove 10 is provided on both the front and rear sides of the connecting pipe 8, a spring 11 is provided inside the groove 10, one end of the spring 11 is fixedly connected inside the groove 10, and the other end of the spring 11 is fixedly connected to one end of the clamping block 9.

[0023] Specifically, a connecting plate 12 is fixedly connected to the inner top of the cleaning port 2, a through hole 13 is provided inside the connecting plate 12, and the number of the through holes 13 is several.

[0024] Specifically, an external thread 14 is provided on the outer side of the cover body 6, internal threads 15 are provided inside both the water inlet 4 and the water outlet 5, and the internal threads 15 are adapted to the external thread 14.

[0025] Specifically, a sealing ring 16 is provided on the outer side above the cleaning box 3, and the sealing ring 16 is attached to the inner wall of the cleaning port 2.

[0026] In this implementation scheme, when it is necessary to clean the inside of the globe valve, the cover body 6 is removed from the water inlet 4 and the water outlet 5 respectively, and then a high-pressure water column is introduced into the water inlet 4, and the cleaning is realized by passing through the cleaning box 3 and the cleaning port 2 into the globe valve. After cleaning, it falls into the cleaning box 3, and the sewage is discharged through the water outlet 5. When cleaning, it is not necessary to unscrew the valve of the globe valve, which brings convenience to the cleaning work.

[0027] By pressing the clamping block 9, the spring 11 expands and contracts, enters from the clamping groove 7 into the inside of the groove 10, separates the clamping block 9 from the clamping groove 7, and then disassembles the connecting pipe 8 from the cleaning port 2, so that the inside of the cleaning box 3 can be cleaned and maintained regularly. The provided connecting plate 12 and through hole 13 can increase the water pressure, the provided sealing ring 16 improves the sealing performance after the connecting pipe 8 is connected to the cleaning port 2, and the provided external thread 14 and internal thread 15 improve the stability after the cover body 6 is connected to the water inlet 4 and the water outlet 5.

[0028] It should be noted that in this article, 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including 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. Without further limitation. An element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0029] 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.

Claims

1. A backwash stop valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a cleaning port (2) at the bottom, the cleaning port (2) extending into the interior of the valve body (1), a cleaning box (3) is provided at the bottom of the cleaning port (2), the cleaning box (3) is snap-connected to the bottom of the cleaning port (2), a water inlet (4) is provided at the right side of the bottom of the cleaning box (3), a water outlet (5) is provided at the left side of the bottom of the cleaning box (3), the water inlet (4) and the water outlet (5) both extend into the interior of the cleaning box (3), and a cover (6) is provided at one end of each of the water inlet (4) and the water outlet (5).

2. The backwash stop valve according to claim 1, characterized in that: A clamping groove (7) is provided on both the front and rear sides of the cleaning port (2); a connecting pipe (8) is provided on the top of the cleaning box (3); a clamping block (9) is movably connected to both the front and rear sides of the connecting pipe (8); the clamping block (9) is adapted to the clamping groove (7) and is clamped inside the clamping groove (7).

3. The backwash stop valve according to claim 2, characterized in that: A groove (10) is provided on both the front and rear sides of the connecting pipe (8), a spring (11) is provided inside the groove (10), one end of the spring (11) is fixedly connected inside the groove (10), and the other end of the spring (11) is fixedly connected to one end of the clamping block (9).

4. The backwash stop valve according to claim 1, characterized in that: A connecting plate (12) is fixedly connected to the top of the cleaning port (2), and a through hole (13) is provided inside the connecting plate (12), and the through holes (13) are in a plurality.

5. The backwash stop valve according to claim 1, characterized in that: The cover body (6) is provided with an external thread (14) on the outside, and the water inlet (4) and the water outlet (5) are both provided with an internal thread (15) inside, and the internal thread (15) is adapted to the external thread (14).

6. The backwash stop valve according to claim 1, characterized in that: A sealing ring (16) is provided on the upper outer side of the cleaning box (3), and the sealing ring (16) is in contact with the inner wall of the cleaning port (2).

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