CN218913781U - Valve with backflow prevention function - Google Patents

Abstract

The utility model relates to a valve with a backflow prevention function, which comprises a valve body, wherein the valve body comprises a valve body, a water inlet pipe and a water outlet pipe are arranged on the valve body, a backflow prevention section is arranged on the water inlet pipe, a limit column is arranged in the backflow prevention section, a backflow prevention plug is arranged on the limit column in a sliding manner, a compression spring is sleeved on the limit column on one side of the backflow prevention plug, which is close to the water outlet pipe, a mounting pipe is arranged at the bottom end of the water inlet pipe on one side, which is far away from the water outlet pipe, of the backflow prevention section, a first sealing plug is arranged in the mounting pipe, a filter screen is arranged at the top end of the first sealing plug in cooperation with the inner cavity of the water inlet pipe, a detachable connection structure is arranged between the first sealing plug and the mounting pipe, a discharge cylinder is arranged at the bottom end of the water outlet pipe, and an opening and closing control structure is arranged in the discharge cylinder.

Description

Valve with backflow prevention function

Technical Field

The utility model relates to the technical field of valves, in particular to a valve with a backflow preventing function.

Background

Valves are control components in fluid delivery systems that can be used to open and close pipes, control flow direction, regulate and control parameters (temperature, pressure and flow) of the delivery medium.

The existing valve stop valve has no backflow prevention performance, when the tightness of the stop valve is poor, a backflow phenomenon is easy to occur, the check valve and the stop valve are matched for use through the length, and the backflow prevention function of a fluid conveying pipeline is realized, so that the check valve and the stop valve are matched for installation during installation, the installation process is complicated, and the installation efficiency is low; in addition, the existing valve is usually provided with a filter screen in the valve body to filter the flowing medium, but the filter screen is inconvenient to detach, and after impurities are accumulated, the filter screen is easy to block, so that the flowing of the valve of the medium is affected; in addition, the conventional valve is easy to deposit the circulating medium in the valve body after being closed, and the inner wall of the valve body is easy to corrode for a long time, so that the circulating medium needs to be discharged in time.

Disclosure of Invention

The utility model aims to provide a valve with a backflow prevention function, so as to solve the problems that in the prior art, a stop valve and a check valve are required to be matched, spliced and installed, the installation process is complex, the installation efficiency is low, and a filter screen in the stop valve is inconvenient to detach.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a valve with prevent function of flowing backwards, includes the valve body, the valve body includes the valve body, be provided with inlet tube and outlet pipe on the valve body, be provided with on the inlet tube and prevent the section of flowing backwards, be provided with spacing post in the section of preventing flowing backwards, it is provided with the anti-backflow stopper to slide on the spacing post, the anti-backflow stopper is close to the spacing post of outlet pipe one side and overlaps and be equipped with compression spring, the inlet tube bottom that outlet pipe one side was kept away from to the section of preventing flowing backwards is provided with the mounting tube, be provided with first sealing plug in the mounting tube, the inner chamber of the top cooperation inlet tube of first sealing plug is provided with the filter screen, be provided with detachable connection structure between first sealing plug and the mounting tube, the bottom of outlet pipe is provided with and discharges a section of thick bamboo, be provided with in the discharge section of thick bamboo and open and close control structure.

As a further scheme of the utility model: the side wall of the discharge cylinder is provided with a discharge pipe, the opening and closing control structure comprises a second sealing plug arranged in the discharge cylinder, a lifting adjusting component is arranged between the bottom end of the second sealing plug and the discharge cylinder, and the discharge cylinder is opened and closed through the cooperation of the discharge pipe and the second sealing plug.

As still further aspects of the utility model: the lifting adjusting assembly comprises an adjusting column arranged at the bottom end of the discharging cylinder in a threaded mode, the top end of the adjusting column is rotationally connected with the second sealing plug through a bearing, an adjusting knob is arranged at the bottom end of the adjusting column, and the second sealing plug is movably adjusted in the discharging cylinder through the adjusting column and the adjusting knob.

As still further aspects of the utility model: the top of second sealing plug is provided with the sealing ball, the inside top cooperation of discharging the section of thick bamboo is provided with the sealing seat, strengthens the top leakproofness of discharging the section of thick bamboo.

As still further aspects of the utility model: the detachable connecting structure comprises a sealing cap which is sleeved on the bottom end of the mounting tube, a connecting column is arranged on the top end of the sealing cap, the connecting column and the first sealing plug are connected through bearing rotation, and the first sealing plug is fixedly mounted in the mounting tube through the cooperation of the sealing cap, the connecting column and the mounting tube, so that the detachable sealing cap is convenient to detach.

As still further aspects of the utility model: be provided with the fixing base in the inlet tube, spacing mounting groove has been seted up to the cooperation filter screen on the fixing base, improves the installation stability and the leakproofness of filter screen in the inlet tube.

As still further aspects of the utility model: and a circulation gap is formed between the backflow prevention plug and the inner cavity of the backflow prevention section and is used for circulating a circulation medium in the backflow prevention section.

Compared with the prior art, the utility model has the advantages that:

1. the utility model comprises a valve body, wherein the valve body comprises a valve body, a water inlet pipe and a water outlet pipe, the water inlet pipe is provided with a backflow prevention section with backflow prevention function, a backflow prevention plug, a limit column and a compression spring, and the backflow prevention section with backflow prevention function, the backflow prevention plug, the limit column, the compression spring and the like are integrally installed with the valve body, so that the installation can be completed at one time without repeated splicing when the installation of the valve body is realized, and the installation simplicity and the installation efficiency are improved.

2. According to the utility model, the detachable filter screen is arranged on the water inlet pipe of the valve body, when the filter screen is required to be cleaned, the sealing cap is screwed, so that the sealing cap is separated from the mounting pipe and pulled downwards, the connecting column is driven to move downwards by the sealing cap, the first sealing plug is driven to move downwards by the connecting column, the filter screen is driven to move downwards by the first sealing plug, the filter screen is moved out of the mounting pipe, and the filter screen is cleaned or replaced, so that the condition that the medium circulation is influenced by impurity blockage at the filter screen can be avoided.

3. According to the utility model, the backflow prevention section, the backflow prevention plug, the limit column and the compression spring are arranged at the water inlet pipe, when the backflow prevention valve is used, a circulating medium enters the valve body through the water inlet pipe, impurities in the circulating medium are firstly intercepted through the filter screen, then the circulating medium reaches the backflow prevention section and presses the backflow prevention plug, so that the backflow prevention plug moves to form a circulation opening, the backflow prevention plug is matched with a circulation clearance for circulation of the circulating medium in the backflow prevention section, and then the circulating medium flows out of the water outlet pipe after passing through the valve body.

4. According to the utility model, the bottom end of the water outlet pipe is provided with the discharge cylinder, the side wall of the discharge cylinder is provided with the discharge pipe, the discharge pipe is internally provided with the second sealing plug, the bottom thread is provided with the adjusting column, the top end of the adjusting column is rotationally connected with the second sealing plug through the bearing, the bottom end of the adjusting column is provided with the adjusting knob, when the discharge of the circulating medium stored in the valve body is required to be realized, the adjusting knob is screwed, the second sealing plug is driven to move in the discharge cylinder through the threaded connection between the adjusting knob and the discharge cylinder, so that the sealing ball is separated from the sealing seat, when the second sealing plug moves to the lower part of the discharge pipe, the communication between the water outlet pipe and the discharge pipe is realized, the circulating medium stored in the valve body can enter the discharge cylinder and is discharged outwards through the discharge pipe, and the condition that the circulating medium stored in the valve body is corroded is avoided.

Drawings

FIG. 1 is a schematic diagram showing the overall structure of a valve with backflow prevention function according to the present utility model;

FIG. 2 is a schematic diagram showing the overall structure of a valve with backflow preventing function according to the present utility model;

FIG. 3 is a cross-sectional view of the overall structure of the present utility model;

FIG. 4 is a cross-sectional view of the overall structure of the present utility model;

fig. 5 is a schematic view of a connection structure among a filter screen, a second sealing plug, a connecting column and a sealing cap in the present utility model.

In the figure: 1. a valve body; 2. a valve body; 3. a water inlet pipe; 4. a water outlet pipe; 5. a backflow prevention section; 6. a limit column; 7. a backflow prevention plug; 8. a compression spring; 9. installing a pipe; 10. a first sealing plug; 11. a filter screen; 12. a discharge cylinder; 13. a discharge pipe; 14. a second sealing plug; 15. an adjusting column; 16. an adjustment knob; 17. a sealing ball; 18. a sealing seat; 19. a sealing cap; 20. a connecting column; 21. a fixing seat; 22. a limit mounting groove; 23. a flow gap.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

referring to fig. 1 to 5, in an embodiment of the present utility model:

the utility model provides a valve with prevent function of flowing backwards, including valve body 1, valve body 1 includes valve body 2, be provided with inlet tube 3 and outlet pipe 4 on the valve body 2, be provided with on the inlet tube 3 and prevent flowing backwards section 5, be provided with spacing post 6 in preventing flowing backwards section 5, it is provided with and prevents flowing backwards stopper 7 to slide on spacing post 6, it is equipped with hold-down spring 8 to prevent flowing backwards stopper 7 to be close to spacing post 6 on outlet pipe 4 side, it is provided with mounting tube 9 to prevent flowing backwards section 5 to keep away from inlet tube 3 bottom on outlet pipe 4 side, be provided with first sealing plug 10 in the mounting tube 9, the top cooperation inlet tube 3's of first sealing plug 10 inner chamber is provided with filter screen 11, be provided with detachable connection structure between first sealing plug 10 and the mounting tube 9, the bottom of outlet pipe 4 is provided with and discharges a section of thick bamboo 12, be provided with in the section of thick bamboo 12 of discharging and open and close control structure.

In the embodiment of the utility model, the following steps are included: the side wall of the discharge cylinder 12 is provided with a discharge pipe 13, the opening and closing control structure comprises a second sealing plug 14 arranged in the discharge cylinder 12, a lifting adjusting component is arranged between the bottom end of the second sealing plug 14 and the discharge cylinder 12, and sealing adjustment of the discharge cylinder 12 is facilitated through cooperation of the discharge pipe 13 and the second sealing plug 14.

In the embodiment of the utility model, the following steps are included: the lifting adjusting component comprises an adjusting column 15 which is arranged at the bottom end of the discharge cylinder 12 in a threaded manner, the top end of the adjusting column 15 is rotationally connected with the second sealing plug 14 through a bearing, the bottom end of the adjusting column 15 is provided with an adjusting knob 16, the adjusting knob 16 is screwed, the second sealing plug 14 is driven to move in the discharge cylinder 12 through the threaded connection between the adjusting knob 16 and the discharge cylinder 12, when the second sealing plug 14 moves to the lower part of the discharge pipe 13, the communication between the water outlet pipe 4 and the discharge pipe 13 is realized, a circulating medium stored in the valve body 2 can enter the discharge cylinder 12 and be discharged outwards through the discharge pipe 13, a sealing ball 17 is arranged at the top of the second sealing plug 14, a sealing seat 18 is matched with the inner top end of the discharge cylinder 12, and the sealing ball 17 is clamped into the sealing seat 18 when the sealing of the discharge cylinder 12 is realized, and the sealing performance of the discharge cylinder 12 can be improved.

In the embodiment of the utility model, the following steps are included: can dismantle connection structure includes that the thread bush establishes the sealing cap 19 in the mounting tube 9 bottom, the inside top of sealing cap 19 is provided with spliced pole 20, rotate through the bearing between spliced pole 20 and the first sealing plug 10 and be connected, when realizing the dismantlement cleanness of filter screen 11, screw the sealing cap 19 for sealing cap 19 breaks away from mounting tube 9, and pull down, drive spliced pole 20 through sealing cap 19 and move down, drive first sealing plug 10 through spliced pole 20 and move down, drive filter screen 11 through first sealing plug 10 and move down, make filter screen 11 follow mounting tube 9 and shift out, realize the cleanness or the change of filter screen 11.

In the embodiment of the utility model, the following steps are included: be provided with fixing base 21 in the inlet tube 3, limit mounting groove 22 has been seted up to cooperation filter screen 11 on the fixing base 21, when realizing the installation of filter screen 11 for in filter screen 11 card goes into limit mounting groove 22, realizes the spacing installation of filter screen 11 in inlet tube 3 through limit mounting groove 22, improves filter screen 11's installation stability, and here, fixing base 21 has the preferential rubber material, can improve the leakproofness between filter screen 11 and the inner chamber of inlet tube 3 like this.

In the embodiment of the utility model, the following steps are included: a circulation gap 23 is formed between the backflow prevention plug 7 and the inner cavity of the backflow prevention section 5, and the circulation medium circulates through the circulation gap 23 in the backflow prevention section 5.

Example 2:

referring to fig. 1 to 5, the utility model relates to a valve with backflow prevention function, comprising a valve body 1, wherein the valve body 1 comprises a valve body 2, a water inlet pipe 3 and a water outlet pipe 4, the backflow prevention section 5 with backflow prevention function, a backflow prevention plug 7, a limit column 6 and a compression spring 8 are arranged on the water inlet pipe 3, and the backflow prevention section 5 with backflow prevention function, the backflow prevention plug 7, the limit column 6, the compression spring 8 and the like are integrally installed with the valve body 1, so that the installation can be completed once without repeated splicing when the installation of the valve body 1 is realized, and the installation simplicity and the installation efficiency are improved.

Example 3:

referring to fig. 1 to 5, on the basis of embodiment 2, the utility model provides a detachable filter screen 11 on the water inlet pipe 3 of the valve body 2, when the cleaning of the filter screen 11 is required to be realized, the sealing cap 19 is screwed, so that the sealing cap 19 is separated from the mounting pipe 9 and pulled downwards, the connecting column 20 is driven to move downwards by the sealing cap 19, the first sealing plug 10 is driven to move downwards by the connecting column 20, the filter screen 11 is driven to move downwards by the first sealing plug 10, the filter screen 11 is moved out of the mounting pipe 9, and the cleaning or replacement of the filter screen 11 is realized, so that the condition that the medium circulation is influenced by the blockage of impurities at the filter screen 11 can be avoided;

according to the utility model, a backflow prevention section 5, a backflow prevention plug 7, a limit column 6 and a compression spring 8 with backflow prevention functions are arranged at the water inlet pipe 3, when the backflow prevention valve is used, a circulating medium enters the valve body 2 through the water inlet pipe 3, impurities in the circulating medium are firstly intercepted through the filter screen 11, then the circulating medium reaches the backflow prevention section 5 and presses the backflow prevention plug 7, so that the backflow prevention plug 7 moves to form a circulation opening and is matched with a circulation gap 23 for circulation of the circulating medium in the backflow prevention section 5, after the circulating medium passes through the valve body 2, the flowing medium flows out of the water outlet pipe 4, and the valve body 1 has a blocking function in the backflow prevention valve disclosed by the utility model, and the backflow prevention plug 7 is automatically returned to the original position under the action of elastic force of the compression spring 8 when backflow phenomenon occurs in the valve body 2;

according to the utility model, the discharging cylinder 12 is arranged at the bottom end of the water outlet pipe 4, the discharging pipe 13 is arranged on the side wall of the discharging cylinder 12, the second sealing plug 14 is arranged in the discharging pipe 13, the bottom thread is provided with the adjusting column 15, the top end of the adjusting column 15 is rotationally connected with the second sealing plug 14 through the bearing, the bottom end of the adjusting column 15 is provided with the adjusting knob 16, when the discharging of the circulating medium accumulated in the valve body 2 is required to be realized, the adjusting knob 16 is screwed, the adjusting column 15 drives the second sealing plug 14 to move in the discharging cylinder 12 through the threaded connection relation between the adjusting knob 16 and the discharging cylinder 12, the sealing ball 17 is separated from the sealing seat 18, when the second sealing plug 14 moves to the lower part of the discharging pipe 13, the communication between the water outlet pipe 4 and the discharging pipe 13 is realized, the circulating medium accumulated in the valve body 2 can enter the discharging cylinder 12 and be discharged outwards through the discharging pipe 13, and the condition that the accumulated circulating medium is corroded in the valve body 2 is avoided.

In all the above mentioned embodiments, the welding, the matching connection of the bolt and the nut, the bolt or the screw connection or other known connection modes can be selected according to the actual situation, and are not described in detail herein, the above description refers to the write-in fixed connection, and the welding is preferentially considered, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art should be covered by the protection scope of the present utility model if the technical scheme and the inventive concept thereof are equivalent or changed within the scope of the present utility model.

Claims (7)

1. The utility model provides a valve with prevent flowing backwards function, includes valve body (1), valve body (1) include valve body (2), be provided with inlet tube (3) and outlet pipe (4), its characterized in that on valve body (2): be provided with on inlet tube (3) and prevent backflow section (5), be provided with spacing post (6) in preventing backflow section (5), it is provided with and prevents backward flow stopper (7) to slide on spacing post (6), it is equipped with hold-down spring (8) to prevent backward flow stopper (7) to be close to spacing post (6) of outlet pipe (4) one side, prevent that inlet tube (3) bottom of outlet pipe (4) one side is kept away from in backflow section (5) is provided with mounting tube (9), be provided with first sealing plug (10) in mounting tube (9), the inner chamber of top cooperation inlet tube (3) of first sealing plug (10) is provided with filter screen (11), be provided with detachable connection structure between first sealing plug (10) and the mounting tube (9), the bottom of outlet pipe (4) is provided with emission section of thick bamboo (12), be provided with in emission section of thick bamboo (12) and open and close control structure.

2. A valve with backflow prevention function according to claim 1, wherein: the side wall of the discharge cylinder (12) is provided with a discharge pipe (13), the opening and closing control structure comprises a second sealing plug (14) arranged in the discharge cylinder (12), and a lifting adjusting assembly is arranged between the bottom end of the second sealing plug (14) and the discharge cylinder (12).

3. A valve with backflow prevention function according to claim 2, characterized in that: the lifting adjusting assembly comprises an adjusting column (15) which is arranged at the bottom end of the discharging barrel (12) in a threaded mode, the top end of the adjusting column (15) is rotatably connected with the second sealing plug (14) through a bearing, and an adjusting knob (16) is arranged at the bottom end of the adjusting column (15).

4. A valve with backflow prevention function according to claim 3, wherein: the top of second sealing plug (14) is provided with sealing ball (17), the inside top cooperation of discharge section of thick bamboo (12) is provided with sealing seat (18).

5. A valve with backflow prevention function according to claim 1, wherein: the detachable connecting structure comprises a sealing cap (19) sleeved at the bottom end of the mounting pipe (9), a connecting column (20) is arranged at the top end of the interior of the sealing cap (19), and the connecting column (20) is rotatably connected with the first sealing plug (10) through a bearing.

6. A valve with backflow prevention function according to claim 1, wherein: a fixed seat (21) is arranged in the water inlet pipe (3), and a limit mounting groove (22) is formed in the fixed seat (21) in cooperation with the filter screen (11).

7. A valve with backflow prevention function according to claim 1, wherein: a circulation gap (23) is formed between the backflow prevention plug (7) and the inner cavity of the backflow prevention section (5).

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