CN210484704U

CN210484704U - Low-resistance backflow preventer for urban water supply

Info

Publication number: CN210484704U
Application number: CN201921604401.2U
Authority: CN
Inventors: 孙婷婷
Original assignee: Suzhou Suvalvar Pipeline Technology Co Ltd
Current assignee: Suzhou Suvalvar Pipeline Technology Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-05-08
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a low resistance backflow preventer for urban water supply, including valve body and compensating pipe, the both ends outer wall of valve body is fixed with the ring flange, and the ring flange one side of keeping away from the valve body is provided with the inlet channel, the ring flange is provided with connecting bolt with the inlet channel junction, compensating pipe is fixed in the middle part lower extreme of valve body, and compensating pipe's inner wall has seted up and has seted up the groove, compensating pipe's lower extreme bottom intercommunication has water supply pipeline, and compensating pipe's inner wall both sides swing joint has the liquid structure of preventing returning, the middle part top of valve body is fixed with the valve gap. This a low resistance backflow preventer for urban water supply is provided with the valve body, and one side diameter of valve body is less than the diameter of opposite side, and the input of valve body is the slot, and when liquid leaks, its pressure is stronger, and the velocity of flow is very fast, and when liquid leaks into wide mouthful department, its pressure falls the end, and the velocity of flow slows down to reach the effect that reduces the liquid velocity of flow.

Description

Low-resistance backflow preventer for urban water supply

Technical Field

The utility model relates to a city water supply system equipment technical field specifically is a low resistance backflow preventer for city water supply.

Background

Municipal water systems are an integral part of municipal utilities. Urban water supply system planning is an integral part of urban overall planning. A municipal water supply system is generally composed of a water source, a water delivery conduit, a water plant and a water distribution network. After water is taken from a water source, the water is sent into a water plant through a water delivery pipe channel for water quality treatment, the treated water is pressurized and then is sent to users through a water distribution pipe network, and the water needs to be used together with a backflow preventer through valves in urban water supply, so that the water supply stability is achieved.

The backflow preventer on the market does not have the pressure compensation function in use, leads to appearing the pipeline short circuit in urban water supply, and the unable effective water supply of high higher floor to the weeping condition easily appears in use compensation pipeline, for this reason, we provide a low resistance backflow preventer for urban water supply.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low resistance backflow preventer for urban water supply to solve the backflow preventer in use on the market that proposes in the above-mentioned background art and do not have the pressure compensation function, lead to the pipeline short circuit appearing in urban water supply, the unable effective water supply of high higher floor, and the problem of the weeping condition easily appears in use compensation pipeline.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low resistance backflow preventer for urban water supply, includes valve body and compensating pipe, the both ends outer wall of valve body is fixed with the ring flange, and the ring flange one side of keeping away from the valve body is provided with the inlet channel, the ring flange is provided with connecting bolt with the inlet channel junction, compensating pipe is fixed in the middle part lower extreme of valve body, and compensating pipe's inner wall has seted up and has seted up the groove, compensating pipe's lower extreme bottom intercommunication has water supply pipeline, and compensating pipe's inner wall both sides swing joint has the liquid structure of preventing returning, the middle part top of valve body is fixed with the valve gap, and the inner wall middle part of valve gap is provided with the reservoir, the inner wall laminating of reservoir has the piston pad, and the lower extreme middle part of piston pad runs through there is the case, the upper end intercommunication of reservoir has hydraulic line.

Preferably, the cross section of the valve body is distributed in a Z shape, and the diameter of one side of the valve body is smaller than that of the other side of the valve body.

Preferably, the valve body, the flange plate and the water inlet pipeline are connected through flanges, and the valve body, the flange plate and the water inlet pipeline are of detachable structures.

Preferably, the valve core is distributed along the vertical central axis of the valve body, and the valve core and the liquid storage tank form a telescopic structure through the piston pad.

Preferably, prevent returning liquid structure including rotating head, compression spring, piston rod, sealed dish and swinging boom, and the outer wall one side of rotating head is provided with compression spring, compression spring's inside laminating has the piston rod, and the other end of piston rod is fixed with sealed dish, the one end welding of sealed dish has the swinging boom.

Preferably, the size of the sealing disc is matched with the size of the groove formed in the inner wall of the compensation pipeline, and the sealing disc and the inner wall of the compensation pipeline form a rotating structure through the rotating arm.

Preferably, the cross sections of the piston rod, the sealing disc and the compensation pipeline are distributed in a triangular shape, and the compensation pipeline and the sealing disc form an elastic structure through the piston rod.

Compared with the prior art, the beneficial effects of the utility model are that: the low-resistance backflow preventer for urban water supply is provided with a valve body, the diameter of one side of the valve body is smaller than that of the other side of the valve body, the input end of the valve body is a narrow opening, when liquid leaks, the pressure is high, the flow rate is high, when the liquid leaks into the wide opening, the pressure is reduced, the flow rate is slow, and therefore the effect of reducing the flow rate of the liquid is achieved;

the valve body, the flange plate and the water inlet pipeline are of detachable structures, the flange plate is used as a connecting piece at the connecting part, the connecting strength is high, the sealing performance is strong, and the flange plate is detachable, so that a user can conveniently overhaul the backflow prevention device, and the use of the user is facilitated;

the compensation pipeline passes through the piston rod and seals the dish and constitutes elastic construction, when the user need compensate pressurization or rivers compensation to the valve body, the user can pass through the moisturizing pipeline, compensate to the valve body is inside, simultaneously, through fluidic driving force, it carries out clockwise rotation along the centre of a circle department of swinging boom to drive sealed dish, whole compensation pipeline intercommunication is opened, and when need not to compensate, the piston rod passes through compression spring resilience and resets, drive sealed dish counter-clockwise turning, reach the effect to the compensation pipeline is sealed, and under the effort of inside pressure, sealed dish can closely laminate the inner wall at the compensation pipeline, and the piston rod all passes through rotary head and swinging boom and rotation connection between the compensation pipeline with sealed dish, reach the validity of this liquid return prevention structure.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of the external structure of the present invention;

fig. 3 is a schematic view of a part of an enlarged structure at a in fig. 1 according to the present invention.

In the figure: 1. a valve body; 2. a flange plate; 3. a water inlet pipe; 4. a connecting bolt; 5. a compensation pipeline; 6. forming a groove; 7. a water replenishing pipeline; 8. a valve cover; 9. a liquid storage tank; 10. a piston pad; 11. a valve core; 12. a hydraulic conduit; 13. a liquid return prevention structure; 1301. rotating the head; 1302. a compression spring; 1303. a piston rod; 1304. sealing the disc; 1305. a rotating arm; 14. a water outlet pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a low-resistance backflow preventer for urban water supply comprises a valve body 1, a flange plate 2, a water inlet pipeline 3, a connecting bolt 4, a compensating pipeline 5, a set groove 6, a water replenishing pipeline 7, a valve cover 8, a liquid storage tank 9, a piston pad 10, a valve core 11, a hydraulic pipeline 12, a liquid return prevention structure 13, a rotating head 1301, a compression spring 1302, a piston rod 1303, a sealing plate 1304, a rotating arm 1305 and a water outlet pipeline 14, wherein the flange plate 2 is fixed on the outer wall of each of two ends of the valve body 1, the water inlet pipeline 3 is arranged on one side, away from the valve body 1, of the flange plate 2, the cross section of the valve body 1 is distributed in a Z shape, the diameter of one side of the valve body 1 is smaller than that of the other side of the valve body, the input end of the valve body 1 is a narrow opening, when liquid leaks, the pressure is high, the flow rate is high, and;

the connecting bolt 4 is arranged at the joint of the flange plate 2 and the water inlet pipeline 3, the valve body 1, the flange plate 2 and the water inlet pipeline 3 are in flange connection, the valve body 1, the flange plate 2 and the water inlet pipeline 3 are in detachable structures, and the flange plate 2 is used as a connecting piece at the joint, so that the connecting strength is high, the sealing performance is strong, and the detachability is realized, a user can conveniently overhaul the backflow prevention device, and the use by the user is convenient;

compensating pipe 5 is fixed in valve body 1's middle part lower extreme, and compensating pipe 5's inner wall has been seted up and has been seted up groove 6, compensating pipe 5's lower extreme bottom intercommunication has moisturizing pipeline 7, and compensating pipe 5's inner wall both sides swing joint has prevents returning liquid structure 13, prevent returning liquid structure 13 including swivel head 1301, compression spring 1302, piston rod 1303, sealed dish 1304 and swinging boom 1305, and outer wall one side of swivel head 1301 is provided with compression spring 1302, the inside laminating of compression spring 1302 has piston rod 1303, and the other end of piston rod 1303 is fixed with sealed dish 1304, the one end welding of sealed dish 1304 has swinging boom 1305

The size of the sealing disc 1304 is matched with the size of the opening groove 6 on the inner wall of the compensation pipeline 5, the sealing disc 1304 forms a rotating structure with the inner wall of the compensation pipeline 5 through the rotating arm 1305, the piston rod 1303, the cross sections of the sealing disc 1304 and the compensation pipeline 5 are distributed in a triangular shape, the compensation pipeline 5 forms an elastic structure with the sealing disc 1304 through the piston rod 1303, when a user needs to perform compensation pressurization or water flow compensation on the valve body 1, the user can compensate the inside of the valve body 1 through the water replenishing pipeline 7, meanwhile, the sealing disc 1304 is driven to rotate clockwise along the circle center of the rotating arm 1305 through the driving force of fluid, the whole compensation pipeline 5 is communicated and opened, when compensation is not needed, the piston rod 1303 is rebounded and reset through the compression spring 1302, the sealing disc 1304 is driven to rotate anticlockwise, the effect of sealing the compensation pipeline 5, the sealing disc 1304 can be tightly attached to the inner wall of the compensation pipeline 5, and the piston rod 1303 and the sealing disc 1304 are rotatably connected with the rotating arm 1305 and the compensation pipeline 5 through the rotating head 1301, so that the effectiveness of the liquid return prevention structure 13 is achieved;

the valve cover 8 is fixed at the top end of the middle part of the valve body 1, a liquid storage tank 9 is arranged in the middle of the inner wall of the valve cover 8, a piston pad 10 is attached to the inner wall of the liquid storage tank 9, a valve core 11 penetrates through the middle of the lower end of the piston pad 10, the valve core 11 is distributed along the vertical central axis of the valve body 1, the valve core 11 and the liquid storage tank 9 form a telescopic structure through the piston pad 10, when a user needs to control the valve body 1 to be closed, the user passes through an air compressor, hydraulic oil flows into the liquid storage tank 9 from a hydraulic pipeline 12 in a pressurizing mode, the hydraulic oil pushes the piston pad 10 to move downwards and pushes the valve core 11 to move downwards, the valve core 11 abuts against the valve body 1 to perform sealing treatment on the valve body 1, the hydraulic pressure is used as a driving;

the upper end of the liquid storage tank 9 is communicated with a hydraulic pipeline 12, and the other end of the valve body 1 is connected with a water outlet pipeline 14 through a flange 2.

For the low resistance backflow preventer for urban water supply, firstly, when a user needs to perform compensation pressurization or water flow compensation on the valve body 1, the user can compensate the inside of the valve body 1 through the water replenishing pipeline 7, and simultaneously, the sealing disc 1304 is driven to rotate clockwise along the circle center of the rotating arm 1305 by the driving force of fluid, the whole compensation pipeline 5 is communicated and opened, and when the compensation is not needed, the piston rod 1303 is rebounded and reset through the compression spring 1302 to drive the sealing disc 1304 to rotate anticlockwise so as to achieve the effect of sealing the compensation pipeline 5, at the moment, when the user needs to control the valve body 1 to be closed, the user passes through the air compressor, hydraulic oil flows into the reservoir 9 from the hydraulic pipeline 12 in a pressurization mode, the hydraulic oil pushes the piston pad 10 to move downwards to push the valve core 11 to move downwards, the valve core 11 pushes against the valve body 1 to perform, and the input end of the valve body 1 is a narrow opening, when liquid leaks, the pressure is strong, the flow rate is fast, when the liquid leaks into the wide opening, the pressure is reduced, the flow rate is slow, and therefore the effect of reducing the flow rate of the liquid is achieved, and the whole using process of the low-resistance backflow preventer for urban water supply is completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a low resistance backflow preventer for urban water supply, includes valve body (1) and compensating pipe (5), its characterized in that: the valve is characterized in that flange plates (2) are fixed on the outer walls of two ends of the valve body (1), a water inlet pipeline (3) is arranged on one side, away from the valve body (1), of each flange plate (2), a connecting bolt (4) is arranged at the joint of each flange plate (2) and the corresponding water inlet pipeline (3), a compensation pipeline (5) is fixed at the lower end of the middle of the valve body (1), a groove (6) is formed in the inner wall of each compensation pipeline (5), a water replenishing pipeline (7) is communicated with the bottom of the lower end of each compensation pipeline (5), liquid return prevention structures (13) are movably connected to two sides of the inner wall of each compensation pipeline (5), a valve cover (8) is fixed at the top end of the middle of the valve body (1), a liquid storage tank (9) is arranged in the middle of the inner wall of each valve cover (8), a piston pad (10) is attached, the upper end of the liquid storage tank (9) is communicated with a hydraulic pipeline (12), and the other end of the valve body (1) is connected with a water outlet pipeline (14) through a flange plate (2).

2. A low resistance backflow preventer for municipal water supply according to claim 1, wherein: the cross section of the valve body (1) is distributed in a Z shape, and the diameter of one side of the valve body (1) is smaller than that of the other side.

3. A low resistance backflow preventer for municipal water supply according to claim 1, wherein: the water inlet pipeline is characterized in that the valve body (1), the flange plate (2) and the water inlet pipeline (3) are connected through flanges, and the valve body (1), the flange plate (2) and the water inlet pipeline (3) are of detachable structures.

4. A low resistance backflow preventer for municipal water supply according to claim 1, wherein: the valve core (11) is distributed along the vertical central axis of the valve body (1), and the valve core (11) and the liquid storage tank (9) form a telescopic structure through the piston pad (10).

5. A low resistance backflow preventer for municipal water supply according to claim 1, wherein: prevent returning liquid structure (13) including rotating head (1301), compression spring (1302), piston rod (1303), sealed dish (1304) and swinging boom (1305), and outer wall one side of rotating head (1301) is provided with compression spring (1302), the inside laminating of compression spring (1302) has piston rod (1303), and the other end of piston rod (1303) is fixed with sealed dish (1304), the one end welding of sealed dish (1304) has swinging boom (1305).

6. A low resistance backflow preventer according to claim 5, wherein: the size of the sealing disc (1304) is matched with the size of the opening groove (6) of the inner wall of the compensation pipeline (5), and the sealing disc (1304) forms a rotating structure with the inner wall of the compensation pipeline (5) through the rotating arm (1305).

7. A low resistance backflow preventer according to claim 5, wherein: the cross sections of the piston rod (1303), the sealing disc (1304) and the compensation pipeline (5) are distributed in a triangular shape, and the compensation pipeline (5) forms an elastic structure through the piston rod (1303) and the sealing disc (1304).