A water inlet pipe

Abstract

A water inlet pipe provided by the present invention comprises a water inlet pipe and a joint assembly connected to the water inlet end of the water inlet pipe. The joint assembly includes a joint whose water outlet side is inserted into the water inlet end of the water inlet pipe, a lock nut and a check assembly. A locking convex edge is protruded on the outer side wall of the water inlet side of the joint. A locking ring that abuts against one side of the locking convex edge is provided around the inner wall of the lock nut. A water flow channel is arranged in the joint from the water inlet side to the water outlet side. The check assembly is arranged in the water flow channel. The water inlet pipe of the present invention can effectively prevent the dirty water in household washing appliances such as washing machines from being sucked back into the water pipe network by the negative pressure in the water pipe network.

Description

Technical Field

[0001] The invention relates to the technical field of water inlet pipes for household appliances, in particular to a water inlet pipe. Background Art

[0002] Existing water inlet pipes used in household washing appliances, especially washing machines, are all straight-through water pipes. During use, water can flow in both directions in the water inlet pipes. In a multi-story building environment, if there is a water outage and users on the lower floors use water, negative pressure will be generated in the water pipes of the lower floors. Since the height difference between the users on the upper floors and the water use is large, the generated negative pressure may suck dirty water in washing appliances such as washing machines back into the water pipe network. The dirty water sucked back into the water pipe network will pollute the clean water in the water pipe network. If the contaminated water is used for cooking food or drinking, it will seriously damage the health of the users on the lower floors. At the same time, some Western countries have mandatory requirements that dirty water in washing appliances cannot flow back from the water inlet pipe into the water pipe network to pollute the water pipe network. Therefore, the existing water inlet pipe structure used in household washing appliances, especially washing machines, still has room for improvement. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a water inlet pipe, which can effectively prevent dirty water in household washing appliances such as washing machines from being sucked back into the water pipe network by the negative pressure in the water pipe network.

[0004] The present invention achieves the above object by:

[0005] A water inlet pipe comprises a water inlet pipe and a joint assembly connected to the water inlet end of the water inlet pipe, the joint assembly comprising a joint for plugging the water inlet end of the water inlet pipe on the water outlet side, a locking nut and a non-return assembly, the outer wall of the water inlet side of the joint is provided with a locking ridge, the inner wall of the locking nut is surrounded by a locking ring that abuts one side of the locking ridge, the joint is provided with a water flow channel from the water inlet side to the water outlet side, and the non-return assembly is arranged in the water flow channel.

[0006] In which, the check assembly includes a guide bracket, an elastic member and a check valve, the guide bracket is connected in the water flow channel, the guide bracket is provided with a guide hole, the check valve extends with a valve stem that slides in the guide hole, the check valve is slidably arranged in the water flow channel through the valve stem, and the water inlet side of the water flow channel is connected to a check valve limiting ring with an inner diameter smaller than the outer diameter of the check valve, one end of the elastic member is connected to the guide bracket, and the other end abuts the check valve and pushes the check valve against the check valve limiting ring.

[0007] Among them, the check component includes a guiding sleeve, a guiding bracket, an elastic member and a check valve. The guiding sleeve is embedded in the water flow channel. The guiding bracket is embedded in the water outlet side of the guiding sleeve. A guiding hole is provided on the guiding bracket. The check valve extends a valve stem that is slidably fitted with the guiding hole. The check valve is slidably arranged in the guiding sleeve through the valve stem. A check valve limiting ring smaller than the outer diameter of the check valve is provided on the inner ring of the water inlet side of the guiding sleeve. One end of the elastic member is connected to the guiding bracket, and the other end abuts against the check valve and pushes the check valve to abut against the check valve limiting ring.

[0008] Among them, the elastic member is a compression spring sleeved on the valve stem. One end of the compression spring abuts against the guiding bracket, and the other end abuts against the check valve and pushes the check valve to abut against the check valve limiting ring.

[0009] Among them, the locking convex edge is a locking convex edge ring that protrudes around the outer side wall of the water inlet side of the joint towards the outside of the joint.

[0010] Among them, the locking convex edge ring extends towards the water outlet side of the joint with a number of reinforcing ribs matching the inner diameter of the locking ring. A buckle for buckling the locking ring protrudes in the water outlet side direction of the reinforcing ribs.

[0011] Among them, a first installation groove is recessed on the outer surface of the check valve. A first sealing rubber ring is sleeved in the first installation groove. The outer diameter of the first sealing rubber ring is larger than the inner diameter of the check valve limiting ring.

[0012] Among them, a second installation groove is recessed on the outer surface of the guiding sleeve. A second sealing rubber ring is sleeved in the second installation groove. The guiding sleeve is embedded in the water flow channel through the second sealing rubber ring.

[0013] Among them, an anti-edge ring groove is provided on the check valve limiting ring towards the water inlet side of the joint. A sealing washer is sleeved in the anti-edge ring groove. One side of the sealing washer abuts against the locking convex edge.

[0014] Among them, a guiding sleeve locking ring is embedded in the water inlet side of the water flow channel. An anti-edge ring groove is provided on the guiding sleeve locking ring towards the water inlet side of the joint. A sealing washer is sleeved in the anti-edge ring groove. One side of the sealing washer abuts against the locking convex edge.

[0015] The beneficial effects of the present invention are as follows: when the water inlet pipe provided by the present invention is connected to a washing machine or other washing appliance and a water inlet faucet, the locking nut is tightened and screwed onto the water outlet of the faucet, and the locking ring provided around the inner wall of the locking nut abuts against the locking ridge protruding from the outer wall of the compression joint from the water outlet side, tightly fitting the water inlet side of the joint with the water outlet of the faucet, and the non-return assembly provided in the water flow channel ensures that when the water pipe network is normally supplied with water, water can flow forward through the water flow channel and the water inlet pipe to the washing machine or other washing appliance. When the water supply is cut off, the non-return assembly can effectively prevent the dirty water in the washing machine or other household washing appliance from being sucked back into the water pipe network by the negative pressure, thereby avoiding the clean water in the water pipe network from being polluted and damaging the health of the low-level users. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings:

[0017] Figure 1 is a schematic cross-sectional structural diagram of embodiment 1 of the present invention;

[0018] Figure 2 is a schematic cross-sectional structural diagram of embodiment 2 of the present invention;

[0019] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0020] In the above figure, 100. water pipe, 200. joint, 210. locking flange, 211. reinforcing rib, 212. buckle, 220. water flow channel, 300. locking nut, 310. locking ring, 400. check assembly, 410. guide bracket, 411. guide hole, 420. compression spring, 430. check valve, 431. valve stem, 432. first mounting groove, 433. first sealing rubber ring, 440. guide sleeve, 441. second mounting groove, 442. second sealing rubber ring, 500. check valve limiting ring, 510. reverse ring groove, 600. sealing gasket, 700. guide sleeve locking ring. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 and Figure 3As shown, a water inlet pipe includes a water inlet pipe 100 and a joint assembly connected to the water inlet end of the water inlet pipe 100, the joint assembly includes a joint 200 for plugging into the water inlet end of the water inlet pipe 100 on the water outlet side, a locking nut 300 and a non-return assembly 400, a locking flange 210 is convexly provided on the outer wall of the water inlet side of the joint 200, and a locking ring 310 is provided around the inner wall of the locking nut 300 to abut against one side of the locking flange 210, a water flow channel 220 is provided in the joint 200 from the water inlet side to the water outlet side, and the non-return assembly 400 is arranged in the water flow channel 220. The water inlet pipe provided by the present invention, when connecting a washing machine or other washing appliance and a water inlet faucet, the locking nut 300 is tightened and screwed into the water outlet of the faucet, and the locking ring 310 provided around the inner wall of the locking nut 300 abuts against the locking protrusion 210 protruding from the outer wall of the compression joint 200 from the water outlet side, so that the water inlet side of the joint 200 is tightly fastened and docked with the water outlet of the faucet, and the non-return assembly 400 provided in the water flow channel 220 ensures that when the water pipe network is normally supplied with water, water can flow forward to the washing machine or other washing appliance through the water flow channel 220 and the water inlet pipe 100. When the water supply is cut off, the non-return assembly 400 can effectively prevent the dirty water in the washing machine or other household washing appliances from being sucked back into the water pipe network by the negative pressure, so as to avoid the clean water in the water pipe network from being polluted and damaging the health of the low-level users.

[0023] like Figure 1 As shown, in the first embodiment of the present invention, in order to ensure that the check assembly 400 has sufficient strength to prevent dirty water in household washing appliances such as washing machines from being sucked back into the water pipe network by negative pressure, the check assembly 400 includes a guide bracket 410, an elastic member and a check valve 430. The guide bracket 410 is connected to the water flow channel 220. The guide bracket 410 is provided with a guide hole 411. The check valve 430 extends with a valve stem 431 that slidably fits in the guide hole 411. The check valve 430 is slidably arranged in the water flow channel 220 through the valve stem 431. A check valve limiting ring 500 with an inner diameter smaller than the outer diameter of the check valve 430 is connected to the water inlet side of the water flow channel 220. One end of the elastic member is connected to the guide bracket 410, and the other end abuts the check valve 430 and pushes the check valve 430 against the check valve limiting ring 500. When the water pipe network is normally supplied with water, the check valve 430 is pressed toward the water flow channel 220 by the positive flow of water. The water outlet side slides, and at this time the check valve 430 and the check valve limiting ring 500 are pushed open, the water flow channel 220 is connected and water is normally supplied to household washing appliances such as washing machines. When the water pressure in the water pipe network is equal to or lower than the water pressure in the washing machine, the elastic member works, pushing the check valve 430 to reset and slide and abut against the check valve limiting ring 500. The cooperation of the guide hole 411 and the valve stem 431 can enable the check valve 430 to reset and slide, and then abut against the check valve limiting ring 500 to cut off the water flow channel 220, thereby effectively preventing the dirty water in the washing machine from flowing back into the water pipe network.

[0024] like Figure 2 and Figure 3 As shown, the present invention also preferably has a second embodiment. In order to ensure that the check assembly 400 has sufficient strength to prevent the dirty water in the washing machine and other household washing appliances from being sucked back into the water pipe network by the negative pressure, and at the same time to shorten the assembly time of the check assembly 400 and the water pipe 100 joint 200 during production and assembly, and improve production and assembly efficiency, the check assembly 400 includes a guide sleeve 440, a guide bracket 410, an elastic member and a check valve 430. The guide sleeve 440 is embedded in the water flow channel 220, and the guide bracket is 410 is embedded in the water outlet side of the guide sleeve 440. A guide hole 411 is provided on the guide bracket 410. A valve stem 431 that slides and fits the guide hole 411 extends from the check valve 430. The check valve 430 is slidably arranged in the guide sleeve 440 through the valve stem 431. A check valve limiting ring 500 that is smaller than the outer diameter of the check valve 430 is provided on the water inlet side of the guide sleeve 440. One end of the elastic member is connected to the guide bracket 410, and the other end abuts the check valve 430 and pushes the check valve 430 toward the check valve limiting ring 500. When the water pipe network is supplying water normally, the check valve 430 is pressed against the water outlet side of the water flow channel 220 by the positive flow water pressure. At this time, the check valve 430 and the check valve limiting ring 500 are pushed open, and the water flow channel 220 is connected and supplies water normally to household washing appliances such as washing machines. When the water pressure in the water pipe network is equal to or lower than the water pressure in the washing machine, the elastic member works, pushing the check valve 430 to reset and slide and abut against the check valve limiting ring 500. The cooperation of the guide hole 411 and the valve stem 431 can enable the check valve 430 to reset and slide, and then abut against the check valve limiting ring 500 to cut off the water flow channel 220, effectively preventing the dirty water in the washing machine from flowing back into the water pipe network. During production and assembly, the check assembly 400 can be directly embedded in the water flow channel 220 of the joint 200, saving time and effort.

[0025] like Figures 1 to 3 As shown, in order to ensure that the elastic member has sufficient elasticity to drive the check valve 430 to reset and slide, the elastic member is a compression spring 420 sleeved on the valve stem 431, one end of the compression spring 420 abuts the guide bracket 410, and the other end abuts the check valve 430 and pushes the check valve 430 to abut against the check valve limiting ring 500.

[0026] In order to enhance the structural strength of the locking protrusion 210 and to make the force on the abutting surface between the locking protrusion 210 and the locking ring 310 more uniform, the locking protrusion 210 is a locking protrusion ring that is protruded along the edge of the outer wall of the water inlet side of the connector 200 and surrounds the connector 200.

[0027] In order to further strengthen the structural strength of the locking flange 210 and to prevent the locking nut 300 from slipping onto the water inlet pipe 100 from the joint 200 when the water inlet pipe 100 is not connected to the faucet, a number of reinforcing ribs 211 matching the inner diameter of the locking ring 310 extend circumferentially from the locking flange towards the water outlet side of the joint 200, and a buckle 212 for buckling the locking ring 310 is protruded on the water outlet side direction of the reinforcing ribs 211.

[0028] In order to further enhance the sealing performance between the check valve 430 and the check valve limiting ring 500, a first installation groove 432 is recessed on the outer surface of the check valve 430, a first sealing rubber ring 433 is sleeved in the first installation groove 432, and the outer diameter of the first sealing rubber ring 433 is larger than the inner diameter of the check valve limiting ring 500.

[0029] In order to further enhance the sealing performance between the outer surface of the guide sleeve 440 and the inner wall of the water flow channel 220, a second installation groove 441 is recessed on the outer surface of the guide sleeve 440, a second sealing rubber ring 442 is sleeved in the second installation groove 441, and the guide sleeve 440 is embedded in the water flow channel 220 through the second sealing rubber ring 442.

[0030] In order to enhance the sealing performance when the water inlet side of the joint 200 is buckled and docked with the faucet and to prevent water from leaking out from the gap formed between the two, an anti-edge ring groove 510 is provided circumferentially on the water inlet side of the check valve limiting ring 500 towards the joint 200, a sealing washer 600 is sleeved in the anti-edge ring groove 510, and one side of the sealing washer 600 abuts against the locking flange 210.

[0031] As Figure 3 shown, in order to enhance the sealing performance when the water inlet side of the joint 200 is buckled and docked with the faucet and to prevent the guide sleeve 440 from being sucked and slid out of the water flow channel 220 by the water pipe 100 pipeline under negative pressure, a guide sleeve locking ring 700 is embedded on the water inlet side of the water flow channel 220, an anti-edge ring groove 510 is provided circumferentially on the guide sleeve locking ring 700 towards the water inlet side of the joint 200, a sealing washer 600 is sleeved in the anti-edge ring groove 510, and one side of the sealing washer 600 abuts against the locking flange 210.

Claims

1. A water inlet pipe, characterized in that: The invention comprises a water inlet pipe (100) and a joint assembly connected to the water inlet end of the water inlet pipe (100), wherein the joint assembly comprises a joint (200) plugged into the water inlet end of the water inlet pipe (100) on the water outlet side, a locking nut (300) and a non-return assembly (400); a locking ridge (210) is convexly provided on the outer wall of the water inlet side of the joint (200); a locking ring (310) is provided around the inner wall of the locking nut (300) and abuts against one side of the locking ridge (210); a water flow channel (220) is provided on the joint (200) from the water inlet side to the water outlet side; and the non-return assembly (400) is arranged in the water flow channel (220); The non-return assembly (400) comprises a guide sleeve (440), a guide bracket (410), an elastic member and a non-return valve (430). The guide sleeve (440) is embedded in the water flow channel (220). The guide bracket (410) is embedded in the water outlet side of the guide sleeve (440). The guide bracket (410) is provided with a guide hole (411). The non-return valve (430) extends with a sliding matching guide hole (411). 1), the check valve (430) is slidably arranged in a guide sleeve (440) through the valve stem (431), a check valve limiting ring (500) smaller than the outer diameter of the check valve (430) is provided on the water inlet side of the guide sleeve (440) toward the inner ring, one end of the elastic member is connected to the guide bracket (410), and the other end abuts the check valve (430) and pushes the check valve (430) against the check valve limiting ring (500); The locking protrusion (210) is a locking protrusion ring that is provided along the edge of the outer wall of the water inlet side of the connector (200) and protrudes outward from the connector (200); The locking protrusion is provided with a plurality of reinforcing ribs (211) matching the inner diameter of the locking ring (310) along the water outlet side of the annular joint (200), and a buckle (212) for buckling the locking ring (310) is provided on the water outlet side of the reinforcing ribs (211); The outer surface of the check valve (430) is concavely provided with a first mounting groove (432), and a first sealing rubber ring (433) is sleeved in the first mounting groove (432), and the outer diameter of the first sealing rubber ring (433) is larger than the inner diameter of the check valve limiting ring (500); The outer surface of the guide sleeve (440) is concavely provided with a second installation groove (441), a second sealing rubber ring (442) is sleeved in the second installation groove (441), and the guide sleeve (440) is embedded in the water flow channel (220) through the second sealing rubber ring (442); A guide sleeve locking ring (700) is embedded in the water inlet side of the water flow channel (220), and the guide sleeve locking ring (700) is provided with a reverse ring groove (510) toward the water inlet side of the joint (200). A sealing gasket (600) is sleeved in the reverse ring groove (510), and one side of the sealing gasket (600) abuts against the locking ridge (210).

2. The water inlet pipe according to claim 1, characterized in that: The elastic member is a compression spring (420) sleeved on the valve stem (431), one end of the compression spring (420) abuts against the guide bracket (410), and the other end abuts against the check valve (430) and pushes the check valve (430) toward the check valve limiting ring (500).

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