CN215294112U

CN215294112U - Backflow-preventing water inlet pipe

Info

Publication number: CN215294112U
Application number: CN202121932558.5U
Authority: CN
Inventors: 李茂�; 林小平; 瞿国年
Original assignee: Jiangmen Qishi Electrical Appliance Co ltd
Current assignee: Jiangmen Qishi Electrical Appliance Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-12-24
Anticipated expiration: 2031-08-17

Abstract

The utility model provides a pair of prevent inlet tube that flows backwards, joint Assembly including inlet tube and the end of connecting the inlet tube of connecting, joint Assembly includes the joint of the end of the side of intaking of the play water side grafting inlet tube of intaking, lock nut, check valve and lock piece, the protruding edge that is equipped with of lateral wall that connects the side of intaking, lock nut's inner wall encircles the locking ring that is equipped with the protruding edge one side of butt locking, it is equipped with the rivers passageway to go out the water side from the side of intaking to connect, the check valve sets up in the rivers passageway, it is equipped with the ring channel in the side of intaking of rivers passageway to connect, be equipped with rotatory buckle in the side of intaking of ring channel, the edge of lock piece is equipped with screens portion, lock piece is installed in the ring channel through screens portion and rotatory buckle spiral card cooperation. The utility model discloses a prevent that back flush inlet tube structure can avoid the dirty water in domestic washing appliances such as washing machine to be by the negative pressure suck-back return pipe network in the water pipe network, can also prevent effectively that check valve assembly from being broken away from the inlet tube structure by water pressure back flush.

Description

Backflow-preventing water inlet pipe

Technical Field

The utility model belongs to the technical field of domestic appliance inlet tube technique and specifically relates to a prevent inlet tube that flows backwards.

Background

The existing water inlet pipe applied to household washing appliances, particularly washing machines, is a straight-through water pipe, water flow can flow in the water inlet pipe in positive and negative directions in the using process, in the environment of a multi-storey building, if a low-rise user uses water when water is cut off, negative pressure is generated in a water pipeline of the low-rise user, the negative pressure generated by the high-rise users with a high fall from the water-using place may suck the dirty water in the washing appliances such as washing machines back into the water pipe network, dirty water sucked back into the water pipe network can pollute clean water in the water pipe network, and the contaminated water, if used to cook food or be drunk, may seriously damage the health of the lower users, therefore, the water inlet pipe which is currently applied to household washing appliances, particularly washing machines, is provided with a backflow-preventing check valve assembly to prevent negative pressure from sucking sewage in the washing appliances such as the washing machines and the water inlet pipe back into the water pipe network.

However, in the working process of washing appliances such as washing machines and the like, large water pressure is generated in the washing appliances and the water inlet pipe, and the water pressure impacts the check valve component to force the check valve component to be separated from the water inlet pipe, so that the water inlet pipe loses the function of preventing backflow, and the structure of the water inlet pipe still has a large improvement space.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to the not enough of above-mentioned prior art, the utility model provides a prevent inlet tube that flows backwards can avoid the dirty water in domestic washing appliances such as washing machine to be by the negative pressure suck-back return pipe network in the water pipe network, can also prevent effectively that check valve assembly from being broken away from the inlet tube structure by water pressure backwash.

The utility model discloses a realize above-mentioned purpose like this:

the utility model provides a prevent inlet tube that flows backwards, includes the inlet tube and connects the joint Assembly of inlet tube water inlet end, joint Assembly includes joint, lock nut, check valve and the locking piece of outlet side grafting inlet tube water inlet end, the protruding edge that is equipped with of lateral wall that connects the side of intaking, lock nut's inner wall encircles and is equipped with the protruding locking ring along one side of butt locking, it is equipped with the rivers passageway to go out the water side from the side of intaking to connect, the check valve sets up in the rivers passageway, it is equipped with the ring channel in the side of intaking of rivers passageway to connect, be equipped with rotatory buckle in the side of intaking of ring channel, the edge of locking piece is equipped with screens portion, locking piece through screens portion with rotatory buckle cooperate install in the ring channel.

The locking piece is an oval separation net, and two pointed ends of the oval separation net are clamping parts.

The water inlet side of the oval separation net is provided with a rotating sheet, and the rotating sheet and the oval separation net are integrally connected.

The two outer sides of the rotating piece extend outwards from the water inlet side of the locking convex edge to form buckling columns, and sealing gaskets are buckled between the buckling columns and the locking convex edge.

Wherein, the check valve includes guide cylinder, guide bracket, compression spring and piston piece, the guide cylinder inlays the dress in rivers passageway, the guide bracket inlay the dress in the play water side of guide cylinder, be equipped with the guiding hole on the guide bracket, the piston piece extends the valve rod that has the sliding fit guiding hole, the piston piece slides through the valve rod and sets up in the guide cylinder, the side of intaking of guide cylinder is equipped with the confinement ring that is less than the piston piece external diameter towards the inner ring, compression spring cover is located on the valve rod and its one end connection guide bracket, and other end butt piston piece pushes away to the piston piece and supports to the confinement ring and lean on.

Wherein, the water inlet side of the water flow channel is provided with a step hole with the aperture larger than the water outlet side and smaller than the annular groove, and the guide cylinder is embedded in the step hole.

The outer surface of the piston block is concavely provided with a first mounting groove, a first sealing rubber ring is sleeved in the first mounting groove, and the outer diameter of the first sealing rubber ring is larger than the inner diameter of the limiting ring.

The outer surface of the guide cylinder is concavely provided with a second mounting groove, a second sealing rubber ring is sleeved in the second mounting groove, and the guide cylinder is embedded in the water flow channel through the second sealing rubber ring.

The locking convex edge is a locking convex edge ring which is convexly arranged around the outer ring of the joint along the edge of the outer side wall of the water inlet side of the joint.

And the outer side wall of the joint is provided with a retaining ring for fastening the locking ring in an outward ring manner on the water outlet side of the locking convex edge.

The utility model has the advantages that: the utility model provides a water inlet pipe, when connecting washing appliances such as washing machine and the like and a water inlet tap, a locking nut is screwed to screw the water outlet of the tap, the inner wall of the locking nut surrounds the water outlet side butt of a locking ring self-joint arranged to press the convex locking edge arranged convexly on the outer wall of the joint, the water inlet side of the joint is tightly buckled and butted with the water outlet of the tap, and a check valve arranged in a water flow channel ensures that water can positively flow into the washing appliances such as washing machine and the like through the water flow channel and the water inlet pipe when the water supply is normal, when water supply is cut off, water for a bottom user is used, the check valve can effectively prevent dirty water in the household washing appliances such as washing machine and the like from being sucked by negative pressure and flowing back into the water pipe network, the pollution of clean water in the water pipe network and the damage to the health of the low-level user are avoided, when the household washing appliances such as washing machine and the like work, even if the water inlet pipe has higher backward pressing flushing to make the check valve shift to the water outlet of the tap, through block position portion and rotatory buckle turn the card cooperation install in locking piece in the ring channel can support the top of check valve outside the side of intaking of rivers passageway, prevents that the check valve from being strikeed and breaking away from rivers passageway and then influence and prevent the backflow effect, and it is convenient to turn the complex mounting means equipment of card, has simplified the operation, and joint strength is high.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

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

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a perspective view of the locking member.

In the above drawings, 100. the inlet pipe, 200. the joint, 210. the locking flange, 220. the water flow passage, 230. the annular groove, 231. the rotary buckle, 240. the stepped hole, 250. the retaining ring, 300. the locking nut, 310. the locking ring, 400. the check valve, 410. the guide cylinder, 411. the second mounting groove, 420. the guide bracket, 430. the compression spring, 440. the piston block, 441. the valve rod, 442. the first mounting groove, 450. the first sealing rubber ring, 460. the second sealing rubber ring, 470. the limiting ring, 500. the oval-shaped spacer, 510. the retaining part, 520. the rotary piece, 530. the retaining column, 600. the sealing gasket.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, a backflow prevention water inlet pipe includes a water inlet pipe 100 and a joint assembly connected to a water inlet end of the water inlet pipe 100, the joint component comprises a joint 200, a locking nut 300, a check valve 400 and a locking piece, wherein the joint 200 is inserted into the water inlet end head of the water inlet pipe 100 at the water outlet side, the outer side wall of the water inlet side of the joint 200 is convexly provided with a locking convex edge 210, the inner wall of the locking nut 300 is annularly provided with a locking ring 310 abutting against one side of the locking convex edge 210, the joint 200 is provided with a water flow passage 220 from a water inlet side to a water outlet side, the check valve 400 is provided in the water flow passage 220, the joint 200 is provided with an annular groove 230 at the water inlet side of the water flow passage 220, a rotary buckle 231 is arranged in the water inlet side of the annular groove 230, the edge of the locking member is provided with a detent portion 510, and the locking member is rotatably and fittingly installed in the annular groove 230 through the detent portion 510 and the rotary buckle 231. The utility model provides a water inlet pipe 100, when connecting washing appliances such as washing machine and intake tap, lock nut 300 screws the delivery port of spiral joint tap, lock nut 300 inner wall is around the locking ring 310 who is equipped with from the play water side butt of joint 200 oppresses the protruding edge 210 of the protruding locking that establishes of joint 200 outer wall, the side of intaking that connects 200 and the delivery port of tap closely lock butt joint, and the check valve 400 that sets up in rivers passageway 220 has ensured that water can be in the washing appliances such as washing machine through rivers passageway 220 and water inlet pipe 100 forward circulation when water pipe network normally supplies water, and meet the bottom user water consumption when cutting off water, check valve 400 can prevent effectively that the dirty water in domestic washing appliances such as washing machine from being sucked by the negative pressure and flowing back to the water pipe network, avoid the clean water in the water pipe network to be polluted and damage the health of low-level user, when working in domestic washing appliances such as washing machine, even there is higher pouring water oppression in inlet tube 100 to make check valve 400 shift to tap delivery port department, through the cooperation of screens portion 510 and rotatory buckle 231 soon install in locking piece in ring channel 230 can support the top of check valve 400 outside the water inlet side of rivers passageway 220, prevent that check valve 400 from being strikeed and breaking away from rivers passageway 220 and then influence the effect of preventing flowing backwards, and it is convenient to revolve the equipment of the complex mounting means of screens, has simplified the operation, and joint strength is high.

As shown in fig. 1 to 3, in order to further add the deformation resistance of the locking member, and simultaneously, in order to filter large particle impurities entering the washing appliance from the structure of the water inlet pipe 100 during normal water supply, the performance of the washing appliance is prevented from being affected, the locking member is an elliptical partition net, two tips of the elliptical partition net 500 are clamping portions 510, when the washing appliance is assembled, the two flat ends of the elliptical partition net 500 are avoided from rotating buckles 231 and are placed into the annular groove 230, and the elliptical partition net 500 is twisted to enable the clamping portions 510 at the two tips to be in rotating and clamping cooperation with the rotating buckles 231, so that the washing appliance can be tightly clamped in the annular groove 230, and the phenomenon of being loosened by impact is prevented.

As shown in fig. 1 to 3, in order to facilitate the operation of the elliptical partition net 500 when the elliptical partition net is screwed into the annular groove 230 and improve the assembly efficiency, a rotating plate 520 is disposed on the water inlet side of the elliptical partition net 500, and the rotating plate 520 is integrally connected to the elliptical partition net 500.

As shown in fig. 1, in order to enhance the sealing performance when the water inlet side of the connector 200 is fastened and butted with a faucet and prevent water from leaking out from a gap formed between the water inlet side and the faucet, both outer sides of the rotating plate 520 are extended outward from the water inlet side of the locking convex edge 210 with a fastening column 530, and a sealing gasket 600 is fastened between the fastening column 530 and the locking convex edge 210, so that the fastening column 530 is matched with the convex edge to fasten the sealing gasket 600 to prevent the sealing gasket 600 from falling off when the connector 200 is not connected with the faucet.

As shown in fig. 2, in order to ensure that the check valve 400 has sufficient strength to prevent dirty water in a household washing appliance such as a washing machine from being sucked by negative pressure and flowing back to a water pipe network, and to shorten the assembly time of the check valve 400 and the water pipe connector 200 during production and assembly, and to improve the production and assembly efficiency, the check valve 400 comprises a guide cylinder 410, a guide bracket 420, an elastic member and a piston block 440, the guide cylinder 410 is embedded in a water flow channel 220, the guide bracket 420 is embedded in the water outlet side of the guide cylinder 410, a guide hole is arranged on the guide bracket 420, a valve rod 441 slidably fitting the guide hole extends from the piston block 440, the piston block 440 is slidably arranged in the guide cylinder 410 through the valve rod 441, a limiting ring 470 with the water inlet side facing the inner ring of the guide cylinder 410 smaller than the outer diameter of the piston block 440 is arranged, one end of the elastic member is connected with the guide bracket 420, and the other end of the elastic member abuts against the piston block 440 and pushes the limiting ring 470 against the piston block 440, when the water pipe network supplies water normally, the piston block 440 is forced to slide towards the water outlet side of the water flow channel 220 by the water pressure flowing in the positive direction, at the moment, the piston block 440 is pushed away by the abutting of the limiting ring 470, the water flow channel 220 is communicated with and supplies water normally to household washing appliances such as a washing machine, when the water pressure in the water pipe network is equal to or lower than the water pressure in the washing machine, the elastic part works, the abutting piston block 440 resets and slides and abuts against the limiting ring 470, the piston block 440 can be reset and slide by the cooperation of the guide hole and the valve rod 441 and then tightly abuts against the limiting ring 470 to block the water flow channel 220, dirty water in the washing machine is effectively prevented from flowing back to the water pipe network, and when the water pipe network is produced and assembled, the check valve 400 is directly embedded in the water flow channel 220 of the joint 200, time and labor are saved.

As shown in fig. 2, in order to limit the movable stroke of the check valve 400 in the water flow passage 220 and prevent the excessive water pressure from forcing the check valve 400 to slide toward the water outlet side of the water flow passage 220 and fall into the water inlet pipe 100 when water is supplied, the water inlet side of the water flow passage 220 is provided with a stepped hole 240 having a diameter larger than the water outlet side and smaller than the annular groove 230, the guide cylinder 410 is fitted into the stepped hole 240, and the size of the check valve 400 can be designed to be larger to prevent the reduction of the water inlet amount of the water flow passage 220.

As shown in fig. 2, in order to further enhance the sealing performance between the piston block 440 and the restriction ring 470, a first mounting groove 442 is recessed in the outer surface of the piston block 440, a first rubber sealing ring 450 is mounted in the first mounting groove 442, and the outer diameter of the first rubber sealing ring 450 is greater than the inner diameter of the restriction ring 470.

As shown in fig. 2, in order to further enhance the sealing performance between the outer surface of the guide cylinder 410 and the stepped hole 240 and prevent dirty water from leaking into the water pipe network through a gap between the outer surface of the guide cylinder 410 and the stepped hole 240, a second mounting groove 411 is concavely formed in the outer surface of the guide cylinder 410, a second sealing rubber ring 460 is sleeved in the second mounting groove 411, and the guide cylinder 410 is embedded in the water flow passage 220 through the second sealing rubber ring 460.

As shown in fig. 1, in order to enhance the structural strength of the locking ledge 210, the abutting surface of the locking ledge 210 and the locking ring 310 is stressed more uniformly, and in order to make the bottom of the sealing gasket 600 more fit with the locking ledge 210 and enhance the sealing performance, the locking ledge 210 is a ring of the locking ledge 210 which is convexly arranged around the joint 200 along the edge of the outer side wall of the water inlet side of the joint 200.

As shown in fig. 1, in order to prevent the lock nut 300 from sliding down from the joint 200 onto the water inlet pipe 100 when the joint 200 is not connected to the faucet, a retaining ring 250 for retaining the locking ring 310 is provided on the outer side wall of the joint 200 toward the outer side of the water outlet side of the locking ledge 210.

Claims

1. The utility model provides a prevent inlet tube that flows backwards, includes inlet tube (100) and connects the joint Assembly of inlet tube (100) water inlet end, its characterized in that: the joint component comprises a joint (200) which is inserted into the water inlet end of the water inlet pipe (100) at the water outlet side, a locking nut (300), a check valve (400) and a locking piece, the outer side wall of the water inlet side of the joint (200) is convexly provided with a locking convex edge (210), the inner wall of the locking nut (300) is annularly provided with a locking ring (310) which is abutted against one side of the locking convex edge (210), a water flow channel (220) is arranged from the water inlet side to the water outlet side of the joint (200), the check valve (400) is arranged in the water flow channel (220), the joint (200) is provided with an annular groove (230) at the water inlet side of the water flow channel (220), a rotary buckle (231) is arranged in the water inlet side of the annular groove (230), a clamping part (510) is arranged at the edge of the locking piece, the locking piece is installed in the annular groove (230) in a screwing and clamping fit mode through the clamping portion (510) and the rotary clamp (231).

2. The backflow prevention water inlet pipe according to claim 1, wherein: the locking piece is an oval separation net, and two pointed ends of the oval separation net (500) are clamping parts (510).

3. The backflow prevention water inlet pipe according to claim 2, wherein: the oval side of intaking that separates net (500) is equipped with rotor (520), rotor (520) and oval net (500) body coupling that separates.

4. The backflow prevention water inlet pipe according to claim 3, wherein: the two outsides of the rotating sheet (520) extend outwards from the water inlet side of the locking convex edge (210) to form buckling columns (530), and sealing gaskets (600) are buckled between the buckling columns (530) and the locking convex edge (210).

5. The backflow prevention water inlet pipe according to claim 1, wherein: the check valve (400) comprises a guide cylinder (410), a guide support (420), a compression spring (430) and a piston block (440), the guide cylinder (410) is embedded in a water flow channel (220), the guide support (420) is embedded in the water outlet side of the guide cylinder (410), a guide hole is formed in the guide support (420), a valve rod (441) in sliding fit with the guide hole extends from the piston block (440), the piston block (440) is arranged in the guide cylinder (410) in a sliding mode through the valve rod (441), a limiting ring (470) smaller than the outer diameter of the piston block (440) is arranged on the inward ring of the water inlet side of the guide cylinder (410), the compression spring (430) is sleeved on the valve rod (441), one end of the compression spring is connected with the guide support (420), and the other end of the compression spring abuts against the piston block (440) and pushes the piston block (440) to abut against the limiting ring (470).

6. The anti-backflow water inlet pipe according to claim 5, wherein: the water inlet side of the water flow channel (220) is provided with a step hole (240) with the aperture larger than that of the water outlet side and smaller than that of the annular groove (230), and the guide cylinder (410) is embedded in the step hole (240).

7. The anti-backflow water inlet pipe according to claim 5, wherein: the outer surface of the piston block (440) is concavely provided with a first mounting groove (442), a first sealing rubber ring (450) is sleeved in the first mounting groove (442), and the outer diameter of the first sealing rubber ring (450) is larger than the inner diameter of the limiting ring (470).

8. The backflow-preventing water inlet pipe according to claim 6, wherein: the outer surface of the guide cylinder (410) is concavely provided with a second mounting groove (411), a second sealing rubber ring (460) is sleeved in the second mounting groove (411), and the guide cylinder (410) is embedded in the water flow channel (220) through the second sealing rubber ring (460).

9. The backflow-preventing water inlet pipe according to claim 4, wherein: the locking convex edge (210) is a locking convex edge (210) ring which is convexly arranged around the outer side wall of the water inlet side of the joint (200) along the edge towards the outer side of the joint (200).

10. The backflow prevention water inlet pipe according to claim 1, wherein: the outer side wall of the joint (200) is provided with a retaining ring (250) which is used for buckling the locking ring (310) in an outward ring manner on the water outlet side of the locking convex edge (210).