CN220956985U - Backwash filter air valve - Google Patents

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a backwash filter air valve for improving the problem that sundries such as fine sand are easy to influence the normal use of a valve body, which comprises the valve body, wherein a water inlet is formed in the side surface of the valve body, a bearing cylinder is arranged in the valve body, a plurality of perforations are formed in the surface of the bearing cylinder, and floating balls are movably arranged in the bearing cylinder; the valve body is further provided with a water inlet pipe, the water inlet pipe is communicated with the water inlet end of the valve body, and the water inlet pipe is sequentially provided with a filtering piece, a sewage discharging structure, a first cutting-off piece and a flushing pipe along the direction away from the valve body. The filter piece is used for intercepting and filtering impurities, the sewage discharging structure is used for discharging the impurities, and the first cut-off piece is used for controlling the opening and closing of the water inlet pipe. And a second cut-off piece is further arranged on the flushing pipe, one end of the flushing pipe, which is far away from the water inlet pipe, is communicated with the water inlet hole of the valve body, and the water outlet of the flushing pipe faces the perforation. The utility model can wash the floating ball and the filtering piece to ensure the long-term operation effect of the air valve.

Description

Backwash filter air valve

Technical Field

The utility model belongs to the technical field of valves, and particularly relates to a backwash filter air valve.

Background

The air valve is valve equipment commonly used on a waterway pipeline, can exhaust a large amount of air when the pipeline is filled with water, can inhale a large amount of air when the pipeline is under negative pressure, and plays a role in exhausting a small amount of air when the pipeline works normally.

At present, the water possibly contains dead branches, leaves, sediment and the like, so that sundries are easily accumulated in the valve body. In the related art, in order to reduce the influence of sundries on the operation of the valve body, a filtering structure such as a filter screen or a filter plate is arranged on the valve body, and water entering the valve body is filtered through the filtering structure.

In the actual use process, because fine sand is often present in sundries, a small amount of fine sand is easy to be attached to the surface of the floating ball in the valve body after passing through the filtering holes of the filtering structure, the air tightness between the floating ball and the micro exhaust hole is affected by the attached fine sand, and the micro exhaust hole is possibly blocked, so that improvement is needed.

Disclosure of utility model

In order to solve the problem that fine sand is easy to influence the normal use of a valve body, the utility model provides a backwash filter air valve.

The utility model provides a backwash filter air valve, which adopts the following technical scheme:

The back flushing filtering air valve comprises a valve body and a bearing cylinder arranged in the valve body, wherein the surface of the bearing cylinder is provided with a through hole, and a floating ball capable of moving up and down is arranged in the bearing cylinder; the water inlet end of the valve body is communicated with a water inlet pipe, and a filter piece, a sewage discharging structure, a first cut-off piece and a flushing pipe are sequentially assembled on the water inlet pipe along the direction away from the valve body; the flushing pipe is provided with a second cut-off piece, the valve body is provided with a water inlet hole, the water outlet of the flushing pipe is communicated with the water inlet hole of the valve body, and the water outlet of the flushing pipe faces the perforation.

Through adopting above-mentioned technical scheme, under the normal condition, through opening first section piece, close second section piece and blowdown structure, can ensure air valve normal use. When the valve body is required to be overhauled and the impurity-removing operation is carried out, the first cut-off piece is closed, the second cut-off piece is opened, and the pollution discharge structure is used for enabling water flow to the valve body along the flushing pipe, then water flow discharged from the water outlet of the flushing pipe enters the inner cavity of the valve body, and the water flow passes through the through holes on the bearing cylinder to flush fine sand adhered to the surface of the floating ball, then the water flow continues to flush the filtering piece and is discharged along the pollution discharge structure, so that the floating ball and the back cleaning of the filtering piece are realized, and the filtering piece is prevented from being blocked by impurities, or the floating ball is adhered with the fine sand to influence the normal operation of the air valve.

As a further preferred feature, the inlet conduit comprises a base section and an assembly section, the assembly section carrying the filter element, one end of the assembly section being detachably connected to the base section and the other end being detachably connected to the valve body.

By adopting the technical scheme, the water inlet pipe is formed by combining multiple sections, so that the main filter element is independent of the valve body and is not easy to influence the valve body; in the overhaul process, the assembly section can be independently disassembled by a worker, the filter piece is trimmed or replaced, long-term operation of the valve body is guaranteed, and overhaul operation is also convenient.

As a further preferred feature, the filter element comprises a screen clamped between the mounting section and the valve body, the screen covering the ports of the mounting section.

Through adopting above-mentioned technical scheme, the filter screen that sets up covers between assembly section and valve body section through pressing from both sides, can enough ensure good filter effect, also is convenient for later stage staff demolish and change the filter screen.

As a further preference, the screen is recessed at a port of the mounting section.

By adopting the technical scheme, the filter screen sunken towards the inner cavity of the assembly section has larger filter area, and the filter performance of the air valve is improved. In addition, because a larger vertical drop is formed between the concave filter screen and the water outlet end of the flushing pipe, the backwashed water flow has a larger impact force, and the backwashed effect is better.

As a further preferred aspect, the flushing pipe comprises two connecting pipe sections and a flexible pipe section, wherein the flexible pipe section is connected in series between the two connecting pipe sections, one connecting pipe section is communicated with the water inlet hole of the valve body, and the other connecting pipe section is communicated with the water inlet pipe.

By adopting the technical scheme, the flexible connection between the flushing pipe and the valve body as well as between the flushing pipe and the water inlet pipe is realized due to the inherent good bending adaptability of the flexible pipe section, so that the installation and the operation are convenient; meanwhile, the flushing pipe composed of the flexible pipe section and the connecting pipe section has a good buffer effect, and when the high-speed water flows through the connecting pipe section and enters the flexible pipe section during back flushing operation, the flexible pipe section can slow down impact and protect equipment and pipelines from being damaged.

As a further preferable mode, two ends of the flexible pipe section are detachably connected with the adjacent connecting pipe sections respectively, and the connection part of the flexible pipe section and the connecting pipe section is connected with the second cut-off piece in series.

Through adopting above-mentioned technical scheme, the staff can be through closing the second of both ends and cut the piece to realize the water treatment of cutting off of pipeline, conveniently carry out flexible pipe section's dismantlement and trade work.

As a further preferable mode, the inner cavity of the connecting pipe section is provided with a filtering structure, and the pore diameter of the filtering hole of the filtering structure is smaller than that of the filtering hole of the filtering piece.

Through adopting above-mentioned technical scheme, the filtration that sets up can filter the rivers in the backwash pipe to clean rivers to the cleanness of valve body inner structure and filter.

As a further preference, the drain structure comprises a drain pipe and a third cut-off member, one end of the drain pipe being in communication with the mounting section; the third cut-off piece is connected to the blow-off pipe and used for controlling the blow-off pipe to be opened and closed.

By adopting the technical scheme, in the overhaul process, the staff can discharge the backwashed sundries along the sewage pipe by adjusting the third cutting-off piece to ensure that the sewage pipe is in an unblocked state, so that the sundries are prevented from accumulating in the pipe.

As a further preferable mode, the upper end of the valve body is communicated with a valve cover with a vent hole, the inner diameter of the valve cover is gradually reduced from the valve body to the direction of the vent hole, and an adjusting valve clack capable of moving up and down is arranged in the valve cover.

Through adopting above-mentioned technical scheme, when the air in the air valve is outwards discharged by the air vent of valve gap, along with the pressure variation of air, the air can promote and adjust the valve clack and float from top to bottom to can change the clearance size between valve clack and the valve gap internal diameter, satisfy the demand of different displacement, and can prevent when the displacement is big, jack-up the floater in advance and close the air valve, avoid piping system to take place to close valve water hammer.

As a further preferable mode, a guide sleeve is fixedly connected in the valve cover, an adjusting pipe is fixed on the guide sleeve, the adjusting valve clack is slidably sleeved on the periphery of the adjusting pipe, the adjusting valve clack is located above the guide sleeve, an elastic piece is sleeved on the adjusting pipe, and one end of the elastic piece is connected with the adjusting valve clack so as to apply downward elastic force to the adjusting valve clack.

Through adopting above-mentioned technical scheme, the elastic component that sets up can be with the stable swing joint of regulation valve clack on the roof in the protection casing to adjust the valve clack and can follow the axial of valve body and carry out mild upper and lower activity under the effect of medium.

In summary, the utility model at least comprises the following beneficial technical effects:

1. When the valve body is required to be overhauled and the impurity removing operation is carried out, the first cut-off piece is closed, the second cut-off piece is opened, and the sewage discharging structure is used for enabling water flow to the valve body along the flushing pipe, then water flow discharged from the water outlet of the flushing pipe enters the inner cavity of the valve body, and the water flow passes through the through holes on the bearing cylinder to flush fine sand adhered to the surface of the floating ball, then the water flow continues to flush the filtering piece and is discharged along the sewage discharging structure, so that the back cleaning of the floating ball and the filtering piece is realized.

2. The water inlet pipe is formed by combining multiple sections, so that the main filtering structure is independent of the valve body and is not easy to influence the valve body; during the maintenance process, the assembly section can be independently disassembled by a worker, and the filter element is trimmed or replaced, so that the long-term operation of the valve body is ensured.

3. When exhausting, the valve clack is regulated by the pressure to regulate the exhaust amount, and this can avoid the valve closing water hammer.

Drawings

FIG. 1 is a schematic diagram of an air valve in an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the flush tube;

FIG. 3 is a schematic view of the structure of the connecting tube segments and the filter structure;

Fig. 4 is a schematic structural view of the valve cover.

The same reference numbers are used throughout the drawings to reference like elements or structures, wherein:

1. A valve body; 11. a bearing cylinder; 12. a floating ball; 13. a valve cover; 14. a perforated air permeable cylinder; 15. a protective cover; 151. a center positioning sleeve; 16. a ventilation port; 17. adjusting the valve clack; 2. a water inlet pipe; 21. a base section; 22. an assembly section; 23. a flange; 25. a sealing gasket; 3. a filter; 31. a filter screen; 4. a flushing pipe; 41. connecting pipe sections; 411. a filtering structure; 42. a flexible tube section; 5. a first cut-off member; 6. a second cut-off member; 7. a blow-down pipe; 8. a third cutoff member; 91. an adjusting tube; 92. an elastic member; 93. a guide sleeve; 94. a guide rod; 95. a main valve flap; 10. and a water inlet hole.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships that are shown based on the drawings, merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the utility model discloses a backwash filter air valve.

Referring to fig. 1, the backwash filter air valve comprises a valve body 1 and a water inlet pipe 2, wherein a water inlet hole 10 is formed in the side surface of the valve body 1, a supporting cylinder 11 is arranged in the valve body 1, the bottom of the supporting cylinder 11 is hemispherical, a floating ball 12 capable of floating up and down is arranged in the supporting cylinder 11, and a plurality of perforations are formed in the surface of the supporting cylinder 11. And the water inlet pipe 2 is communicated with the bottom of the valve body 1, and the water inlet pipe 2 is sequentially provided with a filtering piece 3, a pollution discharge structure, a first cutting piece 5 and a flushing pipe 4 along the direction away from the valve body 1. The second cut-off piece 6 is arranged on the flushing pipe 4, the water outlet of the flushing pipe 4 is communicated with the water inlet hole 10 of the valve body 1, the water outlet of the flushing pipe 4 faces towards the perforation of the bearing cylinder 11, and the water outlet of the flushing pipe 4 is not lower than the bottom surface of the floating ball 12.

Further, with reference to fig. 1, in the present embodiment, the water inlet pipe 2 comprises a basic section 21 and an assembly section 22, the basic section 21 being used for loading the first intercepting member 5 and the flushing pipe 4, and the assembly section 22 being used for loading the filtering member 3 and the drainage structure.

In order to realize stable connection between the pipe sections, flanges 23 are fixed on the outer edges of the end parts of the pipe sections and the outer edges of the water inlet ends of the valve body 1, and flange connection is adopted between the assembly section 22 and the base section 21 and between the assembly section 22 and the valve body 1. In order to improve the joint tightness of the pipe sections, sealing gaskets 25 are arranged between the assembly section 22 and the base section 21 and between the assembly section 22 and the valve body 1.

Further, the filter 3 may be a filter screen 31, a filter plate with meshes, a filter cartridge with a filter core, or the like; in the present embodiment, the filter 3 includes a filter screen 31, the filter screen 31 is interposed between the fitting section 22 and the valve body 1, and the filter screen 31 covers the upper port of the fitting section 22. Further, the filter screen 31 is recessed from the port of the assembly section 22 toward the inner cavity of the assembly section 22, so that the filter screen 31 has a larger filtering area, a larger vertical drop is formed between the filtering surface of the filter screen 31 and the water outlet of the flushing pipe 4, and the flushing force of water can be increased.

Further, referring to fig. 1 and 2, the flushing pipe 4 includes one flexible pipe section 42 and two connecting pipe sections 41, and the connecting pipe sections 41 and the flexible pipe sections 42 together form a water delivery channel. The flexible tube section 42 is connected in series between the two connecting tube sections 41, and the two ends of the flexible tube section 42 are preferably connected with the two connecting tube sections 41 in an openable and detachable manner, such as a threaded connection. One of the connecting pipe sections 41 communicates with the base section 21 of the water inlet pipe 2 at an end remote from the flexible pipe section 42, and the other connecting pipe section 41 communicates with the water inlet hole 10 of the valve body 1 at an end remote from the flexible pipe section 42. In order to facilitate the disassembly, replacement or maintenance of the flexible pipe section 42, the two connecting pipe sections 41 are each provided with a second shut-off element 6, so that the two second shut-off elements 6 can be directly closed to prevent water from flowing out when the flexible pipe section 42 is disassembled.

Referring to fig. 3, in order to improve the cleaning performance, in another embodiment, a filter structure 411 is further connected to the connection pipe 41, where the filter structure 411 may be a filter plate, a filter screen, or a cylindrical filter element, and the pore size of the filter structure 411 is smaller than that of the filter screen 31.

Further, referring to fig. 1, in order to discharge the backwash dropping impurities on the filter screen 31, the sewage draining structure includes a sewage draining pipe 7 and a third cutting member 8, and one end of the sewage draining pipe 7 is communicated with the base section 21 of the water inlet pipe 2; and the third cut-off 8 is arranged on the drain pipe 7.

In this embodiment, the third cut-off member 8 and the second cut-off member 6 are ball valves, and the ball valves are mounted on the corresponding pipes, and the first cut-off member 5 is a gate valve. In other embodiments, each cut-off piece can also adopt an electric control valve or a butterfly valve and the like, and only the opening and closing adjustment of the pipeline can be performed.

In addition, the sewage draining structure can also adopt any sewage draining mechanism which can be thought by a person skilled in the art without creative labor, such as: the outer wall of the water inlet pipe 2 is provided with a sewage outlet, and the sewage discharging structure comprises a sewage discharging access door arranged on the pipe wall of the water inlet pipe 2, wherein the sewage discharging access door is used for closing or opening the sewage outlet.

Further, referring to fig. 1 and 4, the upper end of the valve body 1 is connected with a valve cover 13 with a top having a vent hole through a flange, the inner diameter of the valve cover 13 is gradually reduced from the valve body 1 to the vent hole, an adjusting valve clack 17 capable of moving up and down is arranged in the valve cover 13, when air in the air valve is discharged outwards from the vent hole of the valve cover 13, the air can push the adjusting valve clack 17 to float up and down along with the pressure change of the air, so that the gap between the adjusting valve clack 17 and the inner diameter of the valve cover 13 can be changed, the requirements of different exhaust amounts can be met, and when the exhaust amount is large, the floating ball 12 is jacked up in advance to close the air valve, and the valve closing water hammer of a pipeline system is avoided.

Further, the inner wall of the valve cover 13 is fixedly connected with a guide sleeve 93 through a rigid part, an adjusting pipe 91 is fixed on the guide sleeve 93, a guide rod 94 is arranged in the adjusting pipe 91 in a sliding manner along the vertical direction, the lower end of the guide rod 94 is connected with a main valve flap 95, the lower surface of the main valve flap 95 is opposite to the upper surface of the floating ball 12, and the main valve flap 95 can move up and down to seal the ventilation opening 16 on the flange. The adjusting valve clack 17 is movably sleeved on the periphery of the adjusting pipe 91, the adjusting valve clack 17 is positioned above the guide sleeve 93, the adjusting pipe 91 is also sleeved with an elastic piece 92, one end of the elastic piece 92 is connected with the adjusting valve clack 17, and downward elastic force is applied to the adjusting valve clack 17.

Further, in order to prevent rainwater and dust in the external environment from falling into the valve body 1, the upper end of the valve cover 13 is communicated with the perforated air permeable cylinder 14, the top of the perforated air permeable cylinder 14 is connected with the protective cover 15, the protective cover 15 covers the upper end of the perforated air permeable cylinder 14, and the outer periphery of the protective cover 15 is bent downwards along the outer periphery of the perforated air permeable cylinder 14.

Further, the inner top wall of the protection cover 15 is fixed with a central positioning sleeve 151, and the elastic member 92 is a spring in this embodiment, and may be a elastic cord, an elastic washer, a spring plate, or the like in other embodiments. The upper end of the elastic piece 92 is sleeved on the periphery of the central positioning sleeve 151, and the upper end of the elastic piece 92 is abutted against the inner top wall of the protective cover 15; the lower end of the elastic member 92 is sleeved on the periphery of the guide sleeve 93 and abuts against the upper surface of the adjusting valve clack 17.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. The back flushing filtering air valve is characterized by comprising a valve body (1) and a bearing cylinder (11) arranged in the valve body (1), wherein the surface of the bearing cylinder (11) is provided with perforations, and a floating ball (12) capable of moving up and down is arranged in the bearing cylinder (11);

The water inlet end of the valve body (1) is communicated with a water inlet pipe (2), and the water inlet pipe (2) is sequentially provided with a filtering piece (3), a sewage draining structure, a first cutting-off piece (5) and a flushing pipe (4) along the direction away from the valve body (1);

Be provided with second cut-off piece (6) on wash pipe (4), inlet opening (10) have been seted up to valve body (1) side, the delivery port of wash pipe (4) with inlet opening (10) intercommunication of valve body (1), just the delivery port of wash pipe (4) orientation the perforation.

2. The backwash filter air valve according to claim 1 wherein the water inlet pipe (2) comprises a base section (21) and an assembly section (22), the filter element (3) being mounted in the assembly section (22), one end of the assembly section (22) being detachably connected to the base section (21) and the other end being detachably connected to the valve body (1).

3. The backflushing filter air valve according to claim 2, characterized in that the filter element (3) comprises a filter screen (31), the filter screen (31) being clamped between the assembly section (22) and the valve body (1), the filter screen (31) covering the ports of the assembly section (22).

4. A backflushing filter air valve according to claim 3, characterized in that the filter screen (31) is recessed from the end opening of the mounting section (22) into the interior space of the mounting section (22).

5. A backwash filter air valve according to claim 3 wherein said flushing pipe (4) comprises two connecting pipe sections (41) and one flexible pipe section (42), said flexible pipe section (42) being connected in series between two said connecting pipe sections (41), one of said connecting pipe sections (41) being in communication with the inlet opening (10) of said valve body (1) and the other of said connecting pipe sections (41) being in communication with said inlet pipe (2).

6. The backwash filter air valve according to claim 5 wherein two ends of said flexible pipe section (42) are detachably connected to said two connecting pipe sections (41), one of said second cut-off members (6) being mounted on each of said two connecting pipe sections (41).

7. The backwash filter air valve according to claim 5 wherein the inner cavity of the connecting pipe section (41) is provided with a filter structure (411), and the filter structure (411) has a smaller filter pore size than the filter pore size of the filter element (3).

8. The backflushing filter air valve according to claim 2, characterized in that the blowdown structure comprises a blowdown pipe (7) and a third cutoff piece (8), one end of the blowdown pipe (7) being in communication with the fitting section (22); the third cutting part (8) is connected to the blow-down pipe (7) and used for controlling the opening and closing of the blow-down pipe (7).

9. The backwash filter air valve according to claim 1, wherein the upper end of the valve body (1) is communicated with a valve cover (13) with a vent hole, the inner diameter of the valve cover (13) gradually decreases from the valve body (1) to the vent hole, and an adjusting valve clack (17) capable of moving up and down is arranged in the valve cover (13).

10. The backwash filter air valve according to claim 9, wherein a guide sleeve (93) is fixedly connected in the valve cover (13), an adjusting pipe (91) is fixed on the guide sleeve (93), the adjusting valve clack (17) is slidably sleeved on the periphery of the adjusting pipe (91), the adjusting valve clack (17) is located above the guide sleeve (93), an elastic piece (92) is further sleeved on the adjusting pipe (91), and one end of the elastic piece (92) is connected with the adjusting valve clack (17) so as to apply downward elastic force to the adjusting valve clack (17).