CN216156190U

CN216156190U - Water inlet pipe structure

Info

Publication number: CN216156190U
Application number: CN202121930440.9U
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: 2022-04-01
Anticipated expiration: 2031-08-17

Abstract

The utility model provides a water inlet pipe structure, which comprises a water inlet pipe and a joint component connected with a water inlet end of the water inlet pipe, wherein the joint component comprises a joint, a locking nut and a check valve, wherein the water outlet side is inserted into the water inlet end of the water inlet pipe, the outer side wall of the joint is convexly provided with a locking convex edge, the inner wall of the locking nut is annularly provided with a locking ring abutting against the locking convex edge on the water outlet side, the joint is provided with a water flow channel from the water inlet side to the water outlet side, the check valve is arranged in the water flow channel, the outer side wall of the water inlet side of the joint is annularly provided with an annular groove, a sealing ring abutting against the locking convex edge on the water outlet side is sleeved in the annular groove, the water inlet side of the sealing ring extends to form a boss ring, the bottom of the boss ring abuts against the water inlet side of the joint, and the inner diameter of the boss ring is smaller than the outer diameter of the check valve, and a rigid member is arranged in the boss ring. The utility model can prevent dirty water in household washing appliances such as washing machines from being sucked back into a water pipe network by negative pressure in the water pipe network, and can also effectively prevent the check valve assembly from being separated from the water pipe structure by being backwashed by water pressure.

Description

Water inlet pipe structure

Technical Field

The utility model relates to the technical field of water inlet pipes of household appliances, in particular to a water inlet pipe structure.

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

In view of the above-mentioned deficiencies of the prior art, the present invention provides a water inlet pipe structure, which can prevent dirty water in household washing appliances such as washing machines from being sucked back into a water pipe network by negative pressure in the water pipe network, and can effectively prevent a check valve assembly from being separated from the water inlet pipe structure by water pressure back flushing.

The present invention thus achieves the above objects:

the utility model provides a water inlet pipe structure, includes the inlet tube and connects the joint Assembly of inlet tube water inlet end, joint Assembly includes that the outlet side pegs graft joint, lock nut and the check valve of inlet tube water inlet end, the protruding edge of locking that is equipped with of lateral wall that connects, lock nut's inner wall encircles and is equipped with the protruding locking ring along the outlet side of butt locking, it is equipped with the rivers passageway to the outlet side from the inlet side to connect, the check valve sets up in the rivers passageway, the lateral wall ring that connects the inlet side is equipped with the annular, the annular endotheca is equipped with the seal ring that the protruding edge of outlet side butt locking, the side extension of intaking of seal ring has the boss ring, the side of intaking that the bottom butt of boss ring connects and its internal diameter are less than the external diameter of check valve, the boss intra-annular is equipped with the rigidity piece.

The inner ring of the boss ring is provided with an annular groove, and the rigid part is a metal ring sheet integrally formed in the annular groove.

The rigid part is a separation net, the periphery of the separation net is integrally formed in the boss ring, and the center of the separation net is blocked at the inner side of the inner ring of the boss ring.

Wherein, the boss ring is integrally formed with an isolation part covering the inner ring surface of the metal ring sheet at the notch of the annular groove.

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, the compression spring cover is located on the valve rod and its one end connect the guide bracket, and its other end butt piston piece pushes away to the piston piece and supports to the confinement ring and lean on.

The water inlet side of the water flow channel is provided with a step hole with the diameter larger than that of the water outlet side of the water flow channel, the guide cylinder is embedded in the step hole, the bottom edge of the guide support abuts against the bottom of the step hole, and the top of the guide cylinder abuts against the bottom of the boss ring.

Wherein the boss ring has an inner diameter equal to an inner diameter of the confinement ring.

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 piston block 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 step hole through the second sealing rubber ring.

The locking convex edge is a locking convex edge ring which is convexly arranged from the outer side wall of the joint to the outer ring of the joint in a surrounding mode.

The utility model has the beneficial effects that: when the water inlet pipe provided by the utility model is connected with washing appliances such as a washing machine and the like and a water inlet tap, a locking nut is screwed and screwed with a water outlet of the tap, a locking ring arranged on the inner wall of the locking nut in a surrounding way is abutted against a locking convex edge arranged on the outer side wall of a pressing joint in a protruding way from the water outlet side of the joint, a sealing washer sleeved in an inner ring groove on the water inlet side of the joint is tightly abutted and compacted with the water outlet of the tap, the sealing performance is enhanced, a check valve arranged in a water flow channel ensures that water can positively flow into the washing appliances such as the washing machine and the like through the water flow channel and the water inlet pipe when the water supply is normal, and water for a bottom layer user is used when the water supply is stopped, the check valve can effectively prevent dirty water in the household washing appliances such as the washing machine and the like from being sucked by negative pressure and flowing back into the water pipe network, and prevent dry water in the water pipe network from being polluted to damage the health of the low layer user, when the household washing appliances such as the washing machine and the like work, even have higher pouring water oppression in the intake pipe to make the check valve shift to tap delivery port department, the top that the boss ring that the side of intaking that the butt connects and internal diameter are less than the external diameter of check valve also can support the check valve, and the rigidity piece that is equipped with in the boss ring simultaneously makes the boss ring have anti deformability, supports the inner ring of big boss ring and breaks away from the rivers passageway when preventing that the check valve from being strikeed, has good anti-backflow effect.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a second embodiment of the present invention.

In the above drawings, 100. the inlet pipe, 200. the joint, 210. the locking flange, 220. the water passage, 221. the stepped hole, 230. the ring groove, 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 stem, 442. the first mounting groove, 450. the first sealing rubber ring, 460. the second sealing rubber ring, 500. the limiting ring, 600. the sealing washer, 610. the boss ring, 611. the metal ring sheet, 612. the spacer net, 613. the isolating part.

Detailed Description

The technical solutions 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a water inlet pipe structure comprises a water inlet pipe 100 and a joint assembly connected with the water inlet end of the water inlet pipe 100, wherein the joint assembly comprises a joint 200, a locking nut 300 and a check valve 400, the water inlet end of the water inlet pipe 100 is inserted into the water outlet side, a locking convex edge 210 is convexly arranged on the outer side wall of the joint 200, a locking ring 310 provided with an abutting locking convex edge 210 on the water outlet side is encircled by the inner wall of the locking nut 300, 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, an annular groove 230 is annularly arranged on the outer side wall of the water inlet side of the joint 200, a sealing washer 600 provided with an abutting locking convex edge 210 on the water outlet side is sleeved in the annular groove 230, a boss ring 610 extends from the water inlet side of the sealing washer 600, the bottom of the boss ring 610 abuts against the water inlet side of the joint 200 and the inner diameter of the boss ring is smaller than the diameter of the water flow channel 220, a rigid member is arranged in the boss ring 610. When the water inlet pipe 100 provided by the utility model is connected with washing appliances such as a washing machine and the like and a water inlet tap, the locking nut 300 is screwed and screwed with the water outlet of the tap, the locking ring 310 arranged around the inner wall of the locking nut 300 is abutted against the locking convex edge 210 arranged on the outer side wall of the pressing joint 200 from the water outlet side, the sealing washer 600 sleeved in the inner ring groove 230 on the water inlet side of the joint 200 is tightly abutted and compacted with the water outlet of the tap, the sealing performance is enhanced, the check valve 400 arranged in the water flow channel 220 ensures that water can positively flow into the washing appliances such as the washing machine and the like through the water flow channel 220 and the water inlet pipe 100 when the water pipe network normally supplies water, and water for a bottom layer user is used when the water stops, the check valve 400 can effectively prevent dirty water in the household washing appliances such as the washing machine and the like from being sucked by negative pressure and flowing back into the water pipe network, and prevent dry bodies in the water pipe network from being polluted by clean water to damage the body health of the low layer user, when the water inlet pipe 100 works in household washing appliances such as a washing machine, even if the water inlet pipe 100 is internally provided with a higher inverted water pressure to enable the check valve 400 to shift towards the water outlet of the faucet, the boss ring 610 which is abutted to the water inlet side of the joint 200 and has the inner diameter smaller than the outer diameter of the check valve can also be abutted against the top of the check valve 400, meanwhile, the rigid piece arranged in the boss ring 610 enables the boss ring 610 to have the deformation resistance, the inner ring which supports the boss ring 610 to be larger when the check valve 400 is impacted is prevented from being separated from the water flow channel 220, and the water inlet pipe has a good anti-backflow effect.

As shown in fig. 1, in embodiment 1 of the present invention, in order to further enhance the deformation resistance of the boss ring 610, an annular groove is formed in the inner ring of the boss ring 610, the rigid member is a metal ring piece 611 integrally formed in the annular groove, and the inner ring of the metal ring piece 611 is larger than the outer diameter of the drain valve, so as to effectively prevent the drain valve from pushing the inner ring of the boss ring 610 to flush out of the water flow channel 220.

As shown in fig. 2, in embodiment 2 of the present invention, in order to further enhance the deformation resistance of the boss ring 610, and simultaneously, in order to filter large particles entering the washing appliance from the water inlet pipe structure during normal water supply and avoid affecting the performance of the washing appliance, the rigid member is a spacer 612, the outer periphery of the spacer 612 is integrally formed in the boss ring 610, the center of the spacer is blocked inside the inner ring of the boss ring 610, and the spacer 612, the outer periphery of which is integrally formed in the boss ring 610, is connected and fastened with the boss ring 610, so as to effectively block the water discharge valve from pushing the inner ring of the boss ring 610 to flush out of the water flow channel 220.

As shown in fig. 1, in order to reduce erosion and corrosion of the inner ring of the metal ring 611 caused by water flow during long-term use and prolong the service life of the metal ring 611, an isolation portion 613 covering the inner ring surface of the metal ring 611 is integrally formed at the notch of the annular groove of the boss ring 610.

As shown in fig. 1 and 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 joint 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 the water flow passage 220, the guide bracket 420 is embedded in the water outlet side of the guide cylinder 410, a guide hole is formed in 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 disposed in the guide cylinder 410 through the valve rod 441, a limiting ring 500 smaller than the outer diameter of the piston block 440 is disposed toward the inner ring of the water inlet side of the guide cylinder 410, one end of the elastic member is connected with the guide bracket 420, and the other end of the piston abuts against the block 440 and pushes the piston block 440 against the limiting ring 500, 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 500, 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 500, the piston block 440 can be closely abutted against and separated from the water flow channel 220 by the guide hole and the valve rod 441, dirty water in the washing machine is effectively prevented from flowing back into the water pipe network, and when the water pipe network is produced and assembled, the check valve 400 is directly embedded into the water flow channel 220 of the connector 200, time and labor are saved.

As shown in fig. 1 and 2, in order to limit the movable stroke of the check valve 400 in the water flow passage 220 and prevent the check valve 400 from sliding in the water flow passage 220 at an accelerated speed by water pressure to impact the boss ring 610, the water inlet side of the water flow passage 220 is provided with a step hole 221 having a larger diameter than the water outlet side thereof, the guide cylinder 410 is fitted into the step hole 221 and the bottom edge of the guide holder 420 abuts against the bottom of the step hole 221, the top of the guide cylinder 410 abuts against the bottom of the boss ring 610, and at the same time, 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. 1 and 2, in order to further reduce the influence of the inner ring of the boss ring 610 on the water inflow, the inner diameter of the boss ring 610 is the same as that of the restriction ring 500.

As shown in fig. 1 and 2, in order to further enhance the sealing performance between the piston block 440 and the restriction ring 500, a first mounting groove 442 is recessed in the outer surface of the piston block 440, a first sealing rubber ring 450 is mounted in the first mounting groove 442, and the outer diameter of the first sealing rubber ring 450 is greater than the inner diameter of the restriction ring 500 of the piston block 440.

As shown in fig. 1 and 2, in order to further enhance the sealing performance between the outer surface of the guide cylinder 410 and the stepped hole 221 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 221, a second mounting groove 411 is concavely provided on 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 stepped hole 221 through the second sealing rubber ring 460.

As shown in fig. 1 and 2, 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 fit with the locking ledge 210 more and enhance the sealing performance, the locking ledge 210 is a locking ledge 210 that is convexly arranged around the outer side wall of the joint 200 towards the outside of the joint 200.

Claims

1. The utility model provides an inlet tube structure, includes inlet tube (100) and connects the joint Assembly of inlet tube (100) water inlet end, joint Assembly includes joint (200), lock nut (300) and check valve (400) of the water inlet end of outlet side grafting inlet tube (100), its characterized in that: the protruding edge (210) of locking that is equipped with of lateral wall that connects (200), the inner wall of lock nut (300) encircles locking ring (310) that is equipped with the protruding edge of butt locking (210) play water side, it is equipped with rivers passageway (220) to play water side from the side of intaking to connect (200), check valve (400) set up in rivers passageway (220), the lateral wall ring that connects (200) the side of intaking is equipped with annular (230), the protruding seal ring (600) along (210) of play water side butt locking is equipped with in annular (230) endotheca, the side of intaking of seal ring (600) extends there is boss ring (610), the bottom butt of boss ring (610) connects the side of intaking of (200) and its internal diameter and is less than the external diameter of check valve, be equipped with the rigidity piece in boss ring (610).

2. The water intake riser structure of claim 1, wherein: the inner ring of the boss ring (610) is provided with an annular groove, and the rigid part is a metal ring piece (611) integrally formed in the annular groove.

3. The water intake riser structure of claim 1, wherein: the rigid piece is a separation net (612), the periphery of the separation net (612) is integrally formed in the boss ring (610), and the center of the separation net is blocked at the inner side of the inner ring of the boss ring (610).

4. The water intake riser structure of claim 2, wherein: the boss ring (610) is integrally formed with an isolation part (613) covering the inner ring surface of the metal ring sheet (611) at the notch of the annular groove.

5. The water intake riser structure of 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 (500) 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 (500).

6. The water intake riser structure of claim 5, wherein: the water inlet side of the water flow channel (220) is provided with a step hole (221) with the aperture larger than the water outlet side of the water flow channel, the guide cylinder (410) is embedded in the step hole (221) and the bottom edge of the guide support (420) is abutted to the bottom of the step hole (221), and the top of the guide cylinder (410) is abutted to the bottom of the boss ring (610).

7. The water intake riser structure of claim 5, wherein: the inner diameter of the boss ring (610) is the same as the inner diameter of the restriction ring (500).

8. The water intake riser structure of 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 piston block (440) limiting ring (500).

9. The water intake riser structure of 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 stepped hole (221) through the second sealing rubber ring (460).

10. The water intake riser structure of claim 1, wherein: the locking convex edge (210) is a ring of the locking convex edge (210) which is convexly arranged around the outer side wall of the joint (200) towards the outer side of the joint (200).