CN108799547B

CN108799547B - Automatic drainage joint

Info

Publication number: CN108799547B
Application number: CN201811036062.2A
Authority: CN
Inventors: 张�杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-06
Filing date: 2018-09-06
Publication date: 2023-05-26
Anticipated expiration: 2038-09-06
Also published as: CN108799547A

Abstract

The invention provides an automatic drainage connector, and belongs to the technical field of machinery. The automatic water draining connector solves the problem that an existing automatic water draining connector does not have a function of preventing a faucet from freezing. The water inlet device comprises a body, wherein the upper end of the body is a water inlet end, the lower end of the body is a water outlet end, an annular sealing gasket and a baffle with the cross section smaller than that of the sealing gasket are arranged in the water inlet end, the baffle is propped against the sealing gasket and seals an upper orifice of a central hole of the sealing gasket, an air inlet hole communicated with the water outlet end is arranged on the outer side of the body, the sealing gasket can deform downwards and seal the air inlet hole when water is fed, a clamping sleeve is connected to the inner sliding of the water outlet end, an elastic supporting piece is connected to the clamping sleeve, a gap is reserved between the upper end of the supporting piece and the lower end face of the sealing gasket, and the upper end of the supporting piece can be propped against the sealing gasket after the clamping sleeve moves upwards. The water pipe freezing prevention device has the advantages of preventing the water pipe from being frozen and preventing the water tap from being frozen.

Description

Automatic drainage joint

Technical Field

The invention belongs to the technical field of machinery, and relates to a joint, in particular to an automatic drainage joint.

Background

With the continuous development of society, the demands of people on the living environment of the people are higher and higher, and more residences (especially some developed countries) are provided with flower gardens, so that the people can conveniently plant flowers and plants or vegetables in the gardens. The water faucet is not needed to be arranged in the garden and connected with the water pipe for use when flowers and plants or vegetables are planted, so that people can conveniently spray water in a large area. When the faucet is closed, more water is always remained in the water pipe, and the phenomenon that the water pipe cannot be used due to freezing of the residual water is easy to occur in winter with low air temperature or in areas with cold weather all the year round, and the phenomenon of frost cracking of the water pipe can also occur in severe cases.

To solve the above problems, the applicant has proposed an automatic drain valve [ application number: 201620500946.9 it is including being the tubular valve body, the valve body upper end is the water inlet, the lower extreme of valve body is the water outlet, the valve body outside is equipped with a plurality of inlet ports that are linked together with the valve body inner chamber, annular seal groove has been seted up in the valve body, the inlet port is offered to on annular seal groove's the downside cell wall by the lateral wall of valve body, be equipped with annular seal in the annular seal groove, annular seal fills up's inner edge and stretches out outside annular seal groove, be equipped with guide core and spring in the water outlet of valve body, the upper end of guide core is held up the lower extreme of annular seal pad and is made annular seal pad be located annular seal groove's upside under the elasticity effect of spring, annular seal pad overcomes the elasticity effect of spring to annular seal groove's downside and removes and seal hole under the effect of hydraulic pressure when the valve body water inlet. When the water faucet is used, the water inlet end of the valve body is connected to the water outlet of the faucet, the water outlet end of the valve body is connected with the water pipe, when the faucet is opened, water pressure acts on the annular sealing gasket, the annular sealing gasket moves to the lower side of the annular sealing groove against the elastic action of the guide core to overcome the spring, the air inlet hole is closed, and at the moment, the valve body normally discharges water and the air inlet hole does not enter air. When the faucet is closed, the water pressure effect is lost, the annular sealing gasket is reset under the action of the spring to enable the air inlet hole to be opened, air outside the valve body enters the valve body through the air inlet hole and enters the water pipe from the water outlet end of the valve body, so that water remained in the water pipe is automatically discharged outwards under the action of air pressure, and the phenomenon of freezing caused by accumulated water in the water pipe is avoided.

However, there is residual water in the faucet except the water pipe, and although the automatic water draining valve can automatically drain the water in the water pipe, the residual water in the faucet cannot be drained through the automatic water draining valve because the automatic water draining valve is connected to the faucet and then cannot be removed, so that the problem that the faucet is frozen exists. In order to prevent the tap from being frozen, the conventional means of the skilled in the art is to improve the structure of the tap to make the tap have an anti-freezing function when the tap is closed, such as a self-return anti-freezing tap disclosed in application number 201721002087.1, an anti-freezing tap disclosed in application number 201721044271.2, a tap with an anti-freezing effect disclosed in application number 201721099098.6, an anti-freezing tap device disclosed in application number 201621394131.3, and the like.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides an automatic water draining joint, which aims to solve the technical problems of preventing a water pipe from freezing and simultaneously preventing a water tap from freezing.

The aim of the invention can be achieved by the following technical scheme:

the utility model provides an automatic drainage connector, includes that the upper end is the water inlet, the lower extreme is the body of water outlet, is equipped with in the water inlet and is annular sealed pad and the separation blade that the cross section is less than sealed pad, the separation blade supports and leans on sealed pad and seal the central hole upper orifice of pad, the body outside is equipped with the communicating inlet port with water outlet, sealed pad can down warp and seal the inlet port when intaking, its characterized in that, water outlet end sliding connection have the cutting ferrule, be connected with on the cutting ferrule and have elastic support piece, have the clearance between the upper end of support piece and the lower terminal surface of sealed pad, support piece upper end can be propped on sealed pad after the cutting ferrule upwards moves.

When the water pipe is used, the water inlet end of the body is connected to the water outlet of the faucet, the water pipe is connected to the water outlet end of the body, the water pipe pushes the clamping sleeve upwards, and the supporting piece can move upwards along with the clamping sleeve to the upper end of the supporting piece to push against the lower end face of the sealing gasket due to the fact that the elastic supporting piece is connected to the clamping sleeve. When the faucet is opened, water flows into the water inlet end of the body, the water inlet pressure is higher than the self elastic force of the sealing gasket and the elastic force of the supporting piece propped against the sealing gasket, so that the sealing gasket and the supporting piece are simultaneously deformed downwards, the upper port of the central hole on the sealing gasket is separated from the baffle plate to be opened, and the sealing gasket seals the air inlet hole, so that water flows into the water outlet end of the body and flows out of the water pipe.

After the faucet is closed, water is remained in the faucet and the water pipe, the sealing gasket and the supporting piece are reset upwards simultaneously by means of self elasticity, the upper end of the supporting piece is propped against the lower end face of the sealing gasket again, residual water in the faucet enters the water inlet end of the body, but only the force of the water accumulation acting on the sealing gasket is smaller than the elasticity of the sealing gasket and the elasticity of the supporting piece propped against the sealing gasket, so that the water accumulation is isolated in the water inlet end, and external air can enter the water pipe along the water outlet end due to the fact that the air inlet hole is opened, and therefore water remained in the water pipe is discharged under the action of air pressure, and the water pipe is prevented from being frozen due to the water accumulation inside. After the residual water in the water pipe is discharged, the water pipe is detached from the water outlet end of the body, at the moment, the clamping sleeve loses the constraint of the water pipe and moves downwards, and therefore the supporting piece moves downwards, a gap is reserved between the upper end of the supporting piece and the lower end face of the sealing pad, that is, the sealing pad is not influenced by the elastic force of the supporting piece any more, the force of accumulated water in the water faucet blocked in the water inlet end on the sealing pad is larger than the elastic force of the sealing pad, and therefore the upper port of the central hole of the sealing pad is opened again, and accumulated water in the water faucet is discharged outwards, so that the water faucet is prevented from being frozen due to accumulated water in the water faucet.

This automatic drainage connects through the cooperation of cutting ferrule and support piece, not only can be with the automatic discharge of residual water in the water pipe to prevent that the water pipe from freezing, also can also be with the automatic discharge of residual water in the tap after the water pipe is torn down simultaneously, in order to prevent that tap from freezing, further improved the practicality of this automatic drainage connects, enriched the function.

In the automatic drainage connector, the clamping sleeve comprises a cylinder body with two open ends, an annular convex shoulder is arranged in the water outlet end and close to the port, the cylinder body is positioned on the inner side of the annular convex shoulder, an annular first blocking shoulder is arranged on the outer side of the upper end of the cylinder body, and the lower end face of the annular first blocking shoulder abuts against the upper end face of the annular convex shoulder.

The clamping sleeve comprises a cylinder body with two open ends, the cylinder body is positioned on the inner side of the annular convex shoulder, so that sliding connection is formed between the clamping sleeve and the water outlet end, the clamping sleeve can move upwards when the water pipe is connected, the upper end of the supporting piece is abutted against the lower end face of the sealing gasket, the air inlet is ensured to be in an open state, external air can enter the water pipe through the water outlet end, and residual water is automatically discharged, so that the purpose of preventing the water pipe from being frozen is achieved; meanwhile, when the water pipe is not connected, the sealing piece is far away from the sealing gasket by downwards moving the cylinder, the position of the cylinder in the water outlet end when the water pipe is not connected is kept by abutting the lower end surface of the annular convex shoulder with the upper end surface of the annular convex shoulder, so that residual water in the faucet can automatically discharge the opening of the upper orifice of the central hole on the sealing gasket, and the aim of preventing the faucet from freezing is fulfilled.

In the automatic water draining joint, the water outlet end is internally provided with an annular step, the water outlet end is internally provided with a large spring, the lower end of the large spring is propped against the upper end face of the cylinder body, and the upper end of the large spring is propped against the surface of the annular step, which faces the upper end face of the cylinder body.

Set up big spring in the play water end, the upper end top of big spring is on the face of annular step orientation barrel up end, the lower extreme top of big spring is on the up end of barrel, just so make the cutting ferrule have the trend of downwardly moving all the time, especially when this automatic drainage connects and does not connect the water pipe, can make support piece upper end keep away from sealed pad lower terminal surface all the time under the elasticity cooperation of big spring to ensure that this automatic drainage connects can be with the ponding automatic discharge of remaining in tap, in order to play the effect that prevents tap freezing.

In the automatic water draining joint, the lower end of the cylinder body extends out of the water outlet end, the outer side of the lower end part of the cylinder body is provided with the annular retaining shoulder II, and the upper end face of the annular retaining shoulder II abuts against the lower end face of the annular retaining shoulder when the water pipe is connected.

The elastic force of support piece is closely continuous with the barrel, set up annular fender shoulder two in the barrel lower extreme outside, the up end that keeps off shoulder two through annular when connecting the water supply pipe offsets with the lower terminal surface of annular convex shoulder and can make the axial position of barrel fixed, then the elasticity of support piece alright be acted on the sealing member all the time, the up end of support piece can be on the lower terminal surface of sealing washer steadily after water piping connection like this to guarantee that the residual water in the tap can't get into in the play water end, thereby avoid this automatic drain connector's waterproof pipe to freeze function and waterproof tap freeze the function and can not appear interfering.

In the automatic water draining joint, the cylinder body is made of plastic, and a plurality of notches are formed in the upper end face of the cylinder body along the circumferential direction.

Because the annular shoulder exists, the annular shoulder at the upper end of the barrel cannot be normally arranged in the water outlet end, a plurality of notches are formed in the circumferential direction of the upper end face of the barrel, and the barrel is matched with the barrel to be made of plastic, so that the upper end of the barrel can be arranged in the water outlet end through inward shrinkage deformation, and the automatic water draining joint can be used for preventing a water pipe from freezing and a water tap from freezing by utilizing the cooperation of the clamping sleeve and the supporting piece in the water outlet end.

In the automatic drainage connector, the clamping sleeve further comprises guide posts positioned on the inner side of the cylinder body and a plurality of connecting pieces circumferentially uniformly distributed on the outer side of the guide posts, the guide posts are axially arranged along the cylinder body, each connecting piece is fixedly connected with the outer wall of the guide posts and the inner wall of the cylinder body, the supporting piece comprises a valve post and a small spring sleeved on the valve post, the valve post penetrates through the guide posts, the lower ends of the small springs act on the connecting positions of the connecting pieces and the guide posts, and the upper ends of the small springs act on the valve post.

The cutting ferrule sets up to still including being located the barrel inboard and along the guide post and a plurality of circumference equipartition in the guide post outside and link firmly the guide post outer wall with barrel inner wall mutually the connection piece, and support piece includes the spool and overlaps the little spring of establishing on the spool, can drive little spring and spool and together upwards move when the cutting ferrule upwards moves, and the spool upper end pushes up on the lower terminal surface of sealed pad under the elasticity effect of little spring simultaneously. The existence of each connection piece makes the setting of cutting ferrule can not influence normal play water, and the setting of guide post makes to possess the structure that can make the spool pass on the cutting ferrule again simultaneously and can let the position that the little spring lower extreme leaned on to can change the cooperation relation between support piece and the sealed pad through the change of cutting ferrule position, so that this automatic drainage joint can realize the automatic discharge of the interior residual ponding of water pipe when connecting the water pipe in order to prevent that the water pipe from freezing, and realize the automatic discharge of the interior residual ponding of tap when the water pipe is dismantled in order to prevent that tap from freezing.

In the automatic drainage connector, as another technical scheme, the clamping sleeve further comprises a guide post positioned on the inner side of the cylinder body and a plurality of connecting pieces circumferentially uniformly distributed on the outer side of the guide post, wherein the guide post is axially arranged along the cylinder body, each connecting piece is fixedly connected with the outer wall of the guide post and the inner wall of the cylinder body, the supporting piece is a supporting spring, the lower end of the supporting spring is inserted on the guide post, and the lower end face of the supporting spring is abutted against the upper end face of each connecting piece.

The cutting ferrule sets up to still including being located the barrel inboard and along the guide post and a plurality of circumference equipartition in the guide post outside and with the connection piece that guide post outer wall linked firmly with barrel inner wall that the axial set up, support piece is supporting spring, the existence of each connection piece makes the setting of cutting ferrule can not influence normal play water, the setting of guide post makes supporting spring can insert again on the guide post simultaneously and form with the cutting ferrule to can change the cooperation relation between support piece and the sealed pad through the change of cutting ferrule position, so that this automatic drainage joint can realize the automatic discharge of the interior residual ponding of water in the water pipe when connecting the water pipe in order to prevent that the water pipe from freezing, and realize the automatic discharge of the interior residual ponding of tap when the water pipe is torn down in order to prevent that tap from freezing.

In the automatic water draining joint, the valve column comprises a column body and a sealing sheet, the sealing sheet is connected to the upper end of the column body, and when the clamping sleeve moves upwards, the sealing sheet abuts against the lower end face of the sealing pad and closes the lower orifice of the upper central hole of the sealing pad.

The valve column comprises a column body and a sealing piece, the column body plays a role of being matched with the clamping sleeve, and the column body and the small spring are carried to move upwards or downwards when the clamping sleeve moves upwards or downwards, so that the elastic force of the small spring can be far away from the sealing pad or act on the sealing pad, and the automatic water draining joint can prevent a water pipe from freezing or prevent a water tap from freezing; the sealing piece seals the lower orifice of the upper central hole of the sealing gasket after being connected with the water pipe, which mainly aims at preventing water in the water pipe from flowing back into the faucet.

In the automatic drainage connector, the column body sequentially comprises a head part, a rod part and a tail part from top to bottom, the rod part penetrates through the guide column, the upper end of the small spring is propped against the lower end face of the head part, and the tail part is in a barb shape and is buckled on the lower end face of the guide column under the action of the elastic force of the small spring.

The setting of head is mainly in order to cooperate with the upper end of little spring, and the afterbody sets up to barb form mainly in order to prevent that cylinder and cutting ferrule from disengaging mutually, can make like this between little spring, spool and the cutting ferrule more steadily cooperate to realize preventing that the water pipe from freezing and prevent tap from freezing.

In the automatic drainage connector, the upper end face of the head is provided with the positioning convex head, the longitudinal section of the positioning convex head is T-shaped, the sealing piece is sleeved on the part with smaller outer diameter of the positioning convex head, the outer edge of the sealing piece extends out of the part with larger outer diameter of the positioning convex head, the edge of the upper end of the sealing piece is provided with the sealing part which is annular and convex, the central hole of the sealing gasket and the sealing part are coaxial, and the inner diameter of the sealing part is smaller than the aperture of the central hole of the sealing gasket.

Because the positioning raised head is positioned on the upper end face of the head, and the longitudinal section of the positioning raised head is T-shaped, the sealing sheet is sleeved on the part with smaller outer diameter of the positioning raised head, which means that the sealing sheet is axially limited. Meanwhile, the edge of the upper end of the sealing piece is provided with a sealing part which is in an annular bulge shape, the central hole of the sealing gasket and the axis of the sealing part are smaller than the aperture of the central hole of the sealing gasket, so that when the connecting water pipe makes the clamping sleeve move upwards, the upper end face of the sealing part can be propped against the lower end face of the sealing gasket, and the lower orifice of the central hole of the sealing gasket can fall on the inner side of the sealing part to enable the lower orifice of the central hole of the sealing gasket to be sealed, thereby isolating the water accumulation in the faucet in the water inlet end, and simultaneously keeping the air inlet hole open all the time to enable the outside air to enter the water outlet end and automatically discharge the residual accumulated water in the water pipe so as to prevent the water pipe from freezing.

Compared with the prior art, this automatic drainage connector sets up cutting ferrule and support piece in the play water end, through the cooperation of cutting ferrule and support piece, not only can be with the automatic discharge of remaining water in the water pipe to prevent that the water pipe from freezing, also can also be with the automatic discharge of remaining water in the tap after the water pipe is torn down simultaneously, in order to prevent that tap from freezing, further improved this automatic drainage connector's practicality, enriched the function.

Drawings

Fig. 1 is a cross-sectional view of the automatic drain connector according to the first embodiment, when the water pipe is not connected.

Fig. 2 is a cross-sectional view of the automatic drain connector according to the first embodiment, when the automatic drain connector is not connected to a water pipe and automatically drains accumulated water in the faucet.

Fig. 3 is a sectional view of the automatic drain connector according to the first embodiment when the water pipe is connected and the faucet is opened.

Fig. 4 is a cross-sectional view of the automatic drain connector of the first embodiment when the water pipe is connected and the faucet is closed.

Fig. 5 is a cross-sectional view of a spool in the first embodiment.

In the figure, 1, a body; 1a, a water inlet end; 1b, a water outlet end; 1b1, an annular shoulder; 1b2, annular steps; 1c, an air inlet hole; 2. a sealing gasket; 2a, a supporting part; 3. a baffle; 4. a cutting sleeve; 4a, a cylinder; 4a1, an annular shoulder I; 4a2, an annular shoulder II; 4a3, notch; 4b, guide posts; 4c, connecting pieces; 5. a support; 6. a large spring; 7. a spool; 7a, a column; 7a1, a head; 7a11, positioning the raised head; 7a2, a stem; 7a3, tail; 7b, sealing sheets; 7b1, a sealing part; 8. a small spring; 9. a water tap; 10. a water pipe; 11. and (5) locking the nut.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1, 2, 3 and 4, an automatic water draining joint comprises a body 1, wherein the upper end of the body 1 is a water inlet end 1a connected with a faucet 9, a locking hole is formed in the outer side of the water inlet end 1a in a penetrating manner, a locking screw is connected in the locking hole in a threaded manner, when the automatic water draining joint is installed, the water inlet end 1a of the body 1 is sleeved outside a water outlet of the faucet 9, and then the body 1 is fixed on the water outlet of the faucet 9 by screwing the locking screw. The lower end of the body 1 is a water outlet end 1b connected with the water pipe 10, threads are arranged on the outer side of the water outlet end 1b, when the water pipe is used, the end of the water pipe 10 is abutted against the end face of the water outlet end 1b by sleeving a lock nut 11 on the outer side of the end part of the water pipe 10, and then the lock nut 11 is connected on the threads on the outer side of the water outlet end 1b in a threaded manner, so that the water pipe 10 and the body 1 are fixed together.

As shown in fig. 1, an annular positioning step is arranged in a water inlet end 1a of the body 1, a compression ring is arranged on the annular positioning step, and the compression ring comprises a ring body, a baffle 3 positioned on the inner side of the ring body and a plurality of struts fixedly connecting the inner wall of the ring body with the outer wall of the baffle 3. The inner side of the body 1 is also provided with an annular positioning groove, an annular sealing gasket 2 is arranged in the annular positioning groove, the sealing gasket 2 is elastic, the sealing gasket 2 is positioned on the upper portion of the annular sealing groove, the inner edge of the sealing gasket 2 extends out of the annular sealing groove, the lower end face of a baffle 3 on the compression ring abuts against the upper end face of the sealing gasket 2, and the baffle 3 shields the central hole of the sealing gasket 2.

As shown in fig. 1, the lower groove wall of the annular positioning groove is arc-shaped, a supporting part 2a which is bent downwards in arc shape is arranged at the lower end edge of the sealing gasket 2, the supporting part 2a is positioned at the lower part of the annular positioning groove, the outer side wall of the supporting part 2a is an arc surface, an air inlet hole 1c is arranged on the outer side of the body 1 in a penetrating manner, the air inlet hole 1c is communicated with the lower part of the annular sealing groove, and when water enters, the sealing gasket 2 can deform downwards and seal the air inlet hole 1 c.

As shown in fig. 1-4, a cutting sleeve 4 is slidably connected in a water outlet end 1b of the body 1 along the axial direction of the body 1, the cutting sleeve 4 comprises a cylinder body 4a with two open ends, an annular shoulder 1b1 is arranged in the water outlet end 1b near the port, an annular shoulder 1a 1 is arranged on the outer side of the upper end of the cylinder body 4a, an annular shoulder 2 is arranged on the outer side of the lower end of the cylinder body 4a, and the annular shoulder 1b1 is arranged between the annular shoulder 1a 1 and the annular shoulder 4a 2. The water outlet end 1b of the body 1 is internally provided with an annular step 1b2, the water outlet end 1b of the body 1 is internally provided with a large spring 6, the lower end of the large spring 6 is propped against the upper end face of the cylinder 4a, the upper end of the large spring 6 is propped against the face of the annular step 1b2 facing the upper end face of the cylinder 4a, the lower end of the cylinder 4a stretches out of the water outlet end 1b of the body 1 under the elastic force of the large spring 6, the lower end face of the annular shoulder 1a 1 is propped against the upper end face of the annular shoulder 1b1, after being connected with a water pipe, the clamping sleeve 4 moves upwards, and the upper end face of the annular shoulder two 4a2 is propped against the lower end face of the annular shoulder 1b 1. The cylinder body 4a is made of plastic, a plurality of notches 4a3 are formed in the upper end face of the cylinder body 4a along the circumferential direction, the annular shoulder 1a 1 at the upper end of the cylinder body 4a cannot be normally installed in the water outlet end 1b due to the annular shoulder 1b1, a plurality of notches 4a3 are formed in the upper end face of the cylinder body 4a along the circumferential direction, and the upper end of the cylinder body 4a is made of plastic in a matched mode, so that the upper end of the cylinder body 4a can be installed in the water outlet end 1b through inward shrinkage deformation.

As shown in fig. 1-4, the ferrule 4 further includes a guide post 4b located inside the cylinder 4a and a plurality of connecting pieces 4c uniformly distributed in the circumferential direction, and each connecting piece 4c is fixedly connected with the outer wall of the guide post 4b and the inner wall of the cylinder 4 a. The sleeve 4 is connected with a supporting piece 5 with elasticity, a gap is formed between the upper end of the supporting piece 5 and the lower end face of the sealing gasket 2, and when the sleeve 4 moves upwards, the upper end of the supporting piece 5 can prop against the lower end face of the sealing gasket 2.

Specifically, as shown in fig. 1, the support 5 includes a spool 7 and a small spring 8 sleeved on the spool 7, the spool 7 is axially disposed along the body 1, a guide hole is axially disposed through the guide post 4b, the lower end of the spool 7 passes through the guide hole, the lower end of the small spring 8 acts on the connection part of each connecting piece 4c and the guide post 4b, the upper end of the small spring 8 acts on the spool 7, and the spool 7 always has a trend of approaching to the lower end face of the sealing gasket 2 under the action of the elastic force of the small spring 8.

As shown in fig. 1 and 5, the spool 7 includes a cylindrical body 7a and a sealing piece 7b, the sealing piece 7b being attached to the upper end of the body, the sealing piece 7b abutting against the lower end face of the packing 2 and closing the lower orifice of the upper center hole of the sealing piece 7b when the ferrule 4 moves upward. The column body 7a sequentially comprises a head portion 7a1, a rod portion 7a2 and a tail portion 7a3 from top to bottom, the rod portion 7a2 penetrates through a guide hole in the guide column 4b, the small spring 8 is sleeved on the rod portion 7a2, the upper end of the small spring 8 is propped against the lower end face of the head portion 7a1, the tail portion 7a3 is in a barb shape, and the tail portion 7a3 is buckled on the lower end face of the guide column 4b under the action of the elastic force of the small spring 8.

As shown in fig. 1 and 5, the upper end face of the head 7a1 is provided with a positioning protruding head 7a11, the longitudinal section of the positioning protruding head 7a11 is T-shaped, a sealing sheet 7b is sleeved on a part with smaller outer diameter of the positioning protruding head 7a11, the outer edge of the sealing sheet 7b extends out of a part with larger outer diameter of the positioning protruding head 7a11, the upper end edge of the sealing sheet 7b is provided with a sealing part 7b1 protruding in an annular shape, the central hole of the sealing gasket 2 and the sealing part 7b1 are coaxial, the inner diameter of the sealing part 7b1 is smaller than the aperture of the central hole of the sealing gasket 2, a gap is reserved between the upper end face of the sealing part 7b1 and the lower end face of the sealing gasket 2, and when the cylinder 4a moves upwards against the elastic force of the large spring 6, the upper end face of the sealing part 7b1 abuts against the lower end face of the sealing gasket 2. In order to increase the contact area when the upper end surface of the seal portion 7b1 abuts against the lower end surface of the gasket 2 and to improve the sealing effect, an annular protruding piece is provided on the outer peripheral side of the upper end of the seal portion 7b 1.

As shown in fig. 1, after the automatic water discharge connector is installed on the water outlet of the faucet 9, when the water pipe 10 is not connected, the lower end of the cylinder 4a of the ferrule 4 is extended out of the water outlet end 1b of the body 1 under the elastic force of the large spring 6, in this state, although the spool 7 always has a tendency to move upwards under the elastic force of the small spring 8, at this time, the elastic force of the large spring 6 is opposite to the elastic force of the small spring 8, so that a gap is formed between the upper end face of the upper sealing part 7b1 of the sealing piece 7b and the lower end face of the sealing gasket 2.

As shown in fig. 2, if water is accumulated in the tap 9 after the tap 9 is closed, the water in the tap 9 flows into the water inlet end 1a of the body 1 under the gravity and acts on the upper end surface of the sealing pad 2, and although the sealing pad 2 has elasticity, the self elasticity of the sealing pad 2 is smaller than the self gravity of the water accumulated in the tap 9, so that after the impact of the water, the center of the sealing pad 2 is deformed downwards, the upper end surface of the sealing pad 2 is separated from the compression ring, and thus, the central hole on the sealing pad 2 is opened, and the water enters the water outlet end 1b of the body 1 through the central hole on the sealing pad 2 and flows outwards from the water outlet end 1b, that is, the water accumulated in the tap 9 is drained, thereby preventing the tap 9 from freezing due to the water accumulated in the inside. When the water is drained, the sealing gasket 2 is reset upwards under the action of the self elastic force, and the upper end surface of the sealing gasket 2 is propped against the compression ring again to shield the central hole on the sealing gasket 2.

As shown in fig. 3, when the automatic water drain connector is connected with the water pipe 10, the water pipe 10 will press the cylinder 4a of the ferrule 4 inwards against the elastic force of the large spring 6, which is equivalent to the upward movement of the ferrule 4 relative to the spool 7. After the water pipe 10 is connected, the end face of the water pipe 10 abuts against the end face of the water outlet end 1b of the body 1, the position of the clamping sleeve 4 is fixed, and the valve column 7 moves upwards under the action of the elastic force of the small spring 8, so that the upper end face of the sealing part 7b1 on the sealing piece 7b abuts against the lower end face of the sealing pad 2, that is, the elastic force of the small spring 8 acts on the sealing pad 2. When the tap 9 is opened, water in the tap 9 enters the water inlet end 1a of the body 1, and at this time, the pressure of the water is larger than the self elastic force of the sealing gasket 2 plus the elastic force of the small spring 8, so that the center of the sealing gasket 2 is deformed downwards to open the center hole of the sealing gasket 2, and the water enters the water outlet end 1b of the body 1 and finally flows into the water pipe 10.

As shown in fig. 4, when the tap 9 is closed, the sealing gasket 2 is restored under the action of the self elastic force, and at the same time, the elastic force of the small spring 8 is acted on the sealing gasket 2 again, and the sealing gasket 2 is abutted against the compression ring again, so that the central hole on the sealing gasket 2 is closed. At this time, even if water exists in the tap 9 and enters the water inlet end 1a of the body 1, the gravity of the water is smaller than the elasticity of the sealing gasket 2 and the elasticity of the small spring 8, so that the water is isolated in the water inlet end 1a of the body 1. Meanwhile, water is remained in the water pipe 10, external air can enter the body 1 through the air inlet hole 1c, and the upper end face of the sealing gasket 2 is abutted against the compression ring to seal the upper port of the central hole of the sealing gasket 2, so that the external air can only enter the water pipe 10 along the water outlet end 1b of the body 1, and the residual water in the water pipe 10 is discharged, so that the water pipe 10 is prevented from being frozen. After the residual accumulated water in the water pipe 10 is emptied, the water pipe 10 is removed to restore the automatic water discharging connector to a state of not being connected with the water pipe 10, so that the water remained in the water tap 9 can be automatically discharged according to the steps.

Example two

The present embodiment is basically the same in structure and principle as the first embodiment, except that: in the present embodiment, the support 5 is a support spring, the lower end of which is inserted on the guide post 4b, and the lower end face of which abuts on the upper end face of each connecting piece 4 c. The support piece 5 is a support spring, the existence of each connecting sheet 4c enables the setting of the clamping sleeve 4 not to influence normal water outlet, and meanwhile, the setting of the guide column 4b enables the support spring to be inserted on the guide column 4b to be connected with the clamping sleeve 4, so that the matching relation between the support piece 5 and the sealing gasket 2 can be changed through the change of the position of the clamping sleeve 4, and therefore, the automatic water draining connector can realize automatic draining of residual water in the water pipe 10 when the water pipe 10 is connected so as to prevent the water pipe 10 from freezing, and realize automatic draining of residual water in the water tap 9 when the water pipe 10 is detached so as to prevent the water tap 9 from freezing.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An automatic drainage joint comprises a body (1) with an upper end being a water inlet end (1 a) and a lower end being a water outlet end (1 b), wherein an annular sealing gasket (2) and a baffle (3) with a cross section smaller than that of the sealing gasket (2) are arranged in the water inlet end (1 a), the baffle (3) abuts against the sealing gasket (2) and closes an upper orifice of a central hole of the sealing gasket (2), an air inlet hole (1 c) communicated with the water outlet end (1 b) is arranged on the outer side of the body (1), the sealing gasket (2) can deform downwards and close the air inlet hole (1 c) when water is fed, and the automatic drainage joint is characterized in that a cutting sleeve (4) is connected in a sliding manner in the water outlet end (1 b), a gap is arranged between the upper end of the cutting sleeve (4) and the lower end of the sealing gasket (2), a gap is reserved between the upper end of the supporting part (5) and the lower end of the sealing gasket (2), the upper end of the supporting part (5) can abut against the sealing gasket (2), the outer side of the sealing gasket (4) comprises two open ends, the sealing sleeve (4) can deform downwards and close the air inlet hole (1 c) to the annular shoulder (1 b) and the annular shoulder (1 a) is positioned on the upper end (1 b) of the annular shoulder (1 a) of the annular shoulder (1 b) and is adjacent to the annular shoulder (1 a) of the upper end (1 b) of the annular shoulder (1 b), the water outlet end (1 b) is internally provided with an annular step (1 b 2), the water outlet end (1 b) is internally provided with a large spring (6), the lower end of the large spring (6) is propped against the upper end face of the cylinder body (4 a), the upper end of the large spring (6) is propped against the surface of the annular step (1 b 2) facing the upper end face of the cylinder body (4 a), the lower end of the cylinder body (4 a) extends out of the water outlet end (1 b), the outer side of the lower end part of the cylinder body (4 a) is provided with an annular shoulder two (4 a 2), and when the water pipe (10) is connected, the upper end face of the annular shoulder two (4 a 2) is propped against the lower end face of the annular shoulder (1 b 1).

2. The automatic water draining joint according to claim 1, wherein the cylinder (4 a) is made of plastic, and a plurality of notches (4 a 3) are formed in the upper end surface of the cylinder (4 a) along the circumferential direction.

3. The automatic water draining joint according to claim 1 or 2, characterized in that the clamping sleeve (4) further comprises a guide post (4 b) positioned at the inner side of the cylinder body (4 a) and a plurality of connecting pieces (4 c) circumferentially uniformly distributed at the outer side of the guide post (4 b), the guide post (4 b) is axially arranged along the cylinder body (4 a), each connecting piece (4 c) is fixedly connected with the outer wall of the guide post (4 b) and the inner wall of the cylinder body (4 a), the supporting piece (5) comprises a valve post (7) and a small spring (8) sleeved on the valve post (7), the valve post (7) penetrates through the guide post (4 b), the lower end of the small spring (8) acts at the joint of each connecting piece (4 c) and the guide post (4 b), and the upper end of the small spring (8) acts on the valve post (7).

4. The automatic drainage joint according to claim 1 or 2, wherein the clamping sleeve (4) further comprises a guide post (4 b) positioned on the inner side of the cylinder body (4 a) and a plurality of connecting pieces (4 c) circumferentially uniformly distributed on the outer side of the guide post (4 b), the guide post (4 b) is arranged along the axial direction of the cylinder body (4 a), each connecting piece (4 c) is fixedly connected with the outer wall of the guide post (4 b) and the inner wall of the cylinder body (4 a), the supporting piece (5) is a supporting spring, the lower end of the supporting spring is inserted on the guide post (4 b), and the lower end face of the supporting spring abuts against the upper end face of each connecting piece (4 c).

5. An automatic drain fitting according to claim 3, wherein the valve stem (7) comprises a cylindrical body (7 a) and a sealing piece (7 b), the sealing piece (7 b) being connected to the upper end of the cylindrical body (7 a), the sealing piece (7 b) abutting against the lower end face of the gasket (2) and closing the lower orifice of the upper central hole of the gasket (2) when the ferrule (4) moves upwards.

6. The automatic drainage joint according to claim 5, wherein the column body (7 a) comprises a head (7 a 1), a rod (7 a 2) and a tail (7 a 3) from top to bottom in sequence, the rod (7 a 2) penetrates through the guide column (4 b), the upper end of the small spring (8) is propped against the lower end face of the head (7 a 1), the tail (7 a 3) is in a barb shape, and the tail (7 a 3) is buckled on the lower end face of the guide column (4 b) under the action of the elasticity of the small spring (8).

7. The automatic drainage joint according to claim 6, wherein the upper end face of the head part (7 a 1) is provided with a positioning protruding head (7 a 11), the longitudinal section of the positioning protruding head (7 a 11) is T-shaped, the sealing piece (7 b) is sleeved on the part with smaller outer diameter of the positioning protruding head (7 a 11), the outer edge of the sealing piece (7 b) extends out of the part with larger outer diameter of the positioning protruding head (7 a 11), the upper end edge of the sealing piece (7 b) is provided with a sealing part (7 b 1) protruding in an annular shape, the central hole of the sealing pad (2) is coaxial with the sealing part (7 b 1), and the inner diameter of the sealing part (7 b 1) is smaller than the aperture of the central hole of the sealing pad (2).