WO2021253924A1

WO2021253924A1 - Water delivery delay valve for use in pipe-in-pipe and hot water discharge system thereof

Info

Publication number: WO2021253924A1
Application number: PCT/CN2021/085201
Authority: WO
Inventors: 陈奎宏
Original assignee: 陈奎宏
Priority date: 2020-06-15
Filing date: 2021-04-02
Publication date: 2021-12-23
Also published as: CN111550580A

Abstract

A water delivery delay valve (100) for use in a pipe-in-pipe, and a hot water discharge system thereof. The hot water discharge system comprises a water heater (101), a liquid inlet valve (102) and a pipe-in-pipe pipeline (103). A branch end of the pipe-in-pipe pipeline (103) is provided with a water delivery delay valve (100) installed by means of a pipe-in-pipe connector. The water delivery delay valve (100) comprises a valve body (1). The valve body (1) is provided with a liquid outlet port (11) and a pipe-in-pipe connecting end (12). An inner flow channel (14) and an outer flow channel (15) are arranged on the pipe-in-pipe connecting end (12). The liquid outlet port (11) is in communication with the inner flow channel (14) and the outer flow channel (15) by means of the valve body (1). A delay sealing part (4) that separates the inner and outer flow channels is arranged in the interior of the pipe-in-pipe connecting end (12). A damping piston (2) and a first reset piece (3) that provides elastic force are arranged in the inner cavity of the valve body (1). The damping piston (2) is installed on the outer wall or the inner wall of the delay sealing part (4), sealing off the outer flow channel (15) or inner flow channel (14); when an internal medium pushes the damping piston (2), causing the damping piston to separate from the delay sealing part (4), the delayed release of liquid in the channel where the damping piston (2) is located is achieved.

Description

Delayed water outlet valve for pipe-in-pipe and its hot water discharge system

Technical field

The invention belongs to the technical field of domestic water, and specifically refers to a delayed water outlet valve used in a pipe-in-pipe and a hot water discharge system thereof.

Background technique

Pipe-in-pipe pipe is composed of pipe-in-pipe and pipe-in-pipe joints, both of which are composed of a pipe-in-pipe inner pipe that forms an inner flow channel and a pipe-in-pipe outer pipe that forms an outer flow channel. It has the advantages of convenient installation, fast liquid discharge, etc. advantage.

The utility model patent with the application number CN201820054377.9 discloses a hot water circulation system, which includes a water heater, a circulation pump, a non-return type starting valve, a hot water pipeline composed of a hot water pipe and a pipe joint, which are connected in sequence. And the tail valve for connecting external equipment. The liquid inlet end of the circulating pump is connected to the output end of the water heater, and the output end is connected to the non-return type start valve; the hot water pipe is provided with a hot water flow path communicating with the liquid inlet cavity of the initial valve and a return cavity communicating with the initial valve The hot water pipes are connected to each other by pipe joints; the outlet end of the hot water pipe is provided with a tail valve, the tail valve includes a tail valve body, and the tail valve body is provided with a connecting heat The tail valve liquid inlet cavity of the water flow channel and the tail valve return cavity connected to the return water flow channel, the tail valve liquid inlet cavity and the tail valve return cavity can be connected to external equipment. The invention has the characteristics of energy saving and environmental protection, convenient pipeline layout, low cost, and quick water discharge.

The above-mentioned hot water circulation system is mainly used in places where hot water demand is relatively large, such as villas, hotels, collective dormitories, and so on. When the hot water demand is relatively small, in order to save resources, there is often no need to recycle. Even so, compared with ordinary pipelines, the pipe-in-pipe pipeline has a much higher output speed of hot water. However, due to the low frequency of using hot water, the hot water in the inner and outer runners is also easy to cool. When we encounter hand washing, When there is a small need for water such as washing your face, you still can't experience hot water in time. Therefore, the applicant further shortens the hot water discharge time by delaying the discharge of the inner flow channel or the outer flow channel, and provides the user with a better water use experience.

The utility model patent with the application number CN201820054377.9 discloses a delay valve, which includes a valve body with an oil inlet cavity and an oil outlet cavity. An oil outlet communicating with the oil outlet cavity, the oil outlet cavity is provided with a piston that divides the oil outlet cavity into an upper cavity and a lower cavity, and the piston has an oil inlet and an oil return hole communicating the upper cavity and the lower cavity , The oil inlet cavity is communicated with the lower cavity. One end of the piston located in the lower cavity is provided with a cup that abuts on the oil return hole and closes the oil return hole. A sealing element is fixed at one end of the lower cavity, and the piston can move under the elastic force of the elastic element and make the sealing element abut against the bottom of the lower cavity to close the oil inlet.

Although the above structure discloses a delay structure, it still has the following problems:

1. This structure is only suitable for single-channel delayed liquid discharge, not suitable for application to pipe-in-tube;

2. The liquid outlet hole of this structure is set on the piston, which is only suitable for a small amount of liquid, and is not suitable for application in water pipes;

3. The hydraulic chamber has a certain pressure, no matter whether it is in the low-pressure sealing state or the high-pressure opening state, the spring will be acted on by the piston, and the spring is always in working state, which affects the service life of the spring.

Summary of the invention

The purpose of the present invention is to provide a delayed water outlet valve and its hot water discharge system which has a simple structure and can quickly produce hot water.

The purpose of the present invention is achieved as follows:

A delayed water outlet valve for a pipe-in-pipe, comprising a valve body. The valve body is provided with a liquid outlet end and a pipe-in-pipe connection end. The pipe-in-pipe connection end is provided with an inner flow channel communicating with the pipe-in-pipe pipe And the outer flow channel of the outer tube in the communicating tube, the liquid outlet end communicates with the inner flow channel and the outer flow channel through the inner cavity of the valve body;

The inner side of the pipe-in-pipe connecting end is provided with a delayed sealing part that separates the inner and outer flow passages, the inner cavity of the valve body is provided with a damping piston and a first resetting member that provides elastic force, and the damping piston is installed on the outer side wall of the delayed sealing part or On the inner side wall, and realize the sealing of the outer runner or the inner runner;

When the internal medium pushes the damping piston to separate the delayed sealing part, the delayed liquid discharge of the flow channel where the damping piston is located is realized.

Preferably, a damping chamber is provided in the valve body, the damping piston and the first resetting member are provided in the damping chamber, and a damping adjustment flow passage communicating with the inner cavity of the valve body is also provided in the damping chamber.

Preferably, a piston guide rod is provided in the valve body, and the piston guide rod is provided with an intermediate flow passage connecting the inner and outer flow passages with the liquid outlet; the damping cavity is provided between the piston guide rod and the inner wall of the valve body, or the piston guide Inside the rod.

Preferably, the damping adjustment flow passage is provided with a damping adjustment hole or a damping adjustment groove on the piston guide rod/damping piston, or is a damping gap provided between the end of the damping piston and the piston guide rod.

Preferably, a damping adjustment member is provided in the valve body, and the inner end of the damping adjustment member is arranged on the damping adjustment flow passage, and the size of the damping adjustment flow passage is controlled to realize the adjustment of the delay time.

Preferably, a filter screen is provided on the inner side of the damping adjustment flow channel.

Preferably, the upper end of the damping piston is provided with a first sealing member for sealing the damping cavity, or/and, the inner wall of the lower end of the damping piston is provided with a second sealing member for sealing the delayed sealing portion.

Preferably, the valve body is provided with a connecting pipe with an inner flow passage, and the connecting pipe extends into the inner cavity of the valve body to form the delayed sealing part; the valve body outside the connecting pipe is provided with a plurality of outer liquid inlet holes, so The outer liquid inlet hole forms the outer flow channel.

Preferably, a movable sealing sleeve and a second reset part are clamped on the outer side of the connecting pipe, and the movable sealing sleeve is used for connecting the inner tube in the tube.

Preferably, a control end is provided between the pipe-in-pipe connection end and the liquid outlet end, and a control valve core and a hand wheel for driving the control valve core to rotate are provided in the control end.

Preferably, the valve body includes an upper valve body provided with a liquid outlet end and a control end, and a lower valve body provided with a pipe-in-pipe connection end. The outer side wall of the lower valve body is provided with a threaded connection connecting the pipe-in-pipe pipe. Part and a clamping part that drives its rotation.

Preferably, the pipe-in-pipe connecting end includes a connecting sleeve separately arranged at the end of the valve body, the middle part of the connecting sleeve is provided with the delayed sealing part and forms an inner flow passage, and its outer periphery is provided with a plurality of outer flow passages. The liquid inlet hole, the connecting sleeve abuts between the tube-in-tube inner tube and the damping piston.

Preferably, the sealing end of the damping piston is provided with at least one return hole, and a return water sheet is provided on the outside of the return hole.

Preferably, a piston bracket is provided on the damping piston, and the piston bracket includes an upper bracket arranged in the damping cavity and a lower bracket for installing the damping piston; when the damping piston seals the outer flow channel, a liquid passage hole is opened on the piston bracket .

A hot water discharge system includes a water heater, a liquid inlet valve, and a pipe-in-pipe pipeline. The end of the branch of the pipe-in-pipe pipeline is equipped with the delayed water outlet valve through a pipe-in-pipe joint.

Preferably, a temperature control device is also provided in the valve body, and when the temperature control device senses hot water, the temperature control device drives the damping piston and opens the flow path;

The temperature control device includes a temperature control housing, and a temperature sensing medium and a temperature control rod are arranged in the temperature control housing. The temperature sensing medium drives the temperature control rod and the temperature control housing to move relative to each other through volume change, and realizes the driving of the damping piston.

Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

1. In the present invention, the inner and outer flow passages are sealed by the damping piston, and the outer flow passage with a larger cross-sectional area is preferentially sealed. When the user uses water, the inner flow channel gives priority to water. Since the cold water volume of the inner flow channel is relatively small, the water flow rate is relatively fast. At this time, if the water is used for a short time, the outer runner is generally not opened, which can save a part of the cold water discharge of the outer runner and save the time of this part of the cold water discharge. After a certain period of time, the medium in the outer runner will slowly drive the damping piston to open the outer runner. The outer runner and the inner runner will discharge water together. At first, the hot water in the outer runner will neutralize the hot water in the inner runner. The temperature is moderate and will not affect the use. With the use of the user, you can experience the normal amount of hot water in a few seconds, which can meet the large demand for water. In this process, the cold water in the outer flow channel that originally needed to be emptied is used, reducing the waste of water resources.

2. The present invention is provided with a damping chamber, and a damping adjustment flow channel is provided in the damping chamber, in order to accurately control the moving speed of the damping piston and realize delayed liquid discharge.

3. The damping adjustment flow channel of the present invention is provided with a damping adjustment piece, which is convenient to adjust the delay time at any time according to the needs, and is convenient to operate.

4. The damping piston of the present invention is provided with a return hole and a water return sheet. When the internal flow path is high in pressure, the pressure can be relieved and returned to protect the equipment and the exhaust system.

Description of the drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention for delaying liquid discharge from an outer flow channel.

Figure 2 is one of the cross-sectional views of the first embodiment of the present invention.

Figure 3 is the second cross-sectional view of the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second embodiment of the present invention for delaying liquid discharge from the outer flow channel.

Figure 5 is a cross-sectional view of a second embodiment of the present invention.

Fig. 6 is an exploded view of the second embodiment of the present invention.

Fig. 7 is a reference diagram of the sealing state of the third embodiment of the delayed discharge of the outer flow channel of the present invention.

Fig. 8 is a reference diagram of the open state of the third embodiment of the delayed discharge of the outer flow channel of the present invention.

Fig. 9 is a cross-sectional view of the damping regulating flow passage at A-A in Fig. 7.

Fig. 10 is a schematic structural diagram of a fourth embodiment of the present invention for delaying liquid discharge from the outer flow channel.

Fig. 11 is a cross-sectional view of the piston holder at B-B in Fig. 10.

Fig. 12 is a schematic structural diagram of a fifth embodiment of the present invention for delaying liquid discharge from the inner flow channel.

Fig. 13 is a schematic diagram of the structure of the hot water discharge system of the present invention.

Fig. 14 is a schematic diagram of the structure of the first temperature control valve of the present invention.

Figure 15 is a cross-sectional view of the first temperature control valve of the present invention.

Fig. 16 is a schematic diagram of the installation structure of the temperature control device of the present invention.

The meaning of the label in the figure:

1- valve body; 2- damping piston; 3- first reset piece; 4- delayed sealing part;

11- Outlet end; 12- Pipe-in-pipe connection end; 13- Control end; 14- Inner flow channel; 15- Outer flow channel; 16- Outer liquid inlet; 17- Spool; 18- Handwheel;

21- damping chamber; 22a- damping adjusting hole; 22b- damping adjusting groove; 23-piston guide rod; 24-middle flow channel;

25- damping adjustment element; 26- filter screen; 27- first sealing element; 28- second sealing element;

31-Connecting pipe; 32-Sealing sleeve; 33-Second reset piece;

41-Upper valve body; 42-Lower valve body; 43-Threaded connection part; 44-Clamping part;

51-Connecting sleeve; 52-Return hole; 53-Return water piece;

61-Piston bracket; 62-Wet hole;

71-Temperature control housing; 72-Temperature sensing medium; 73-Temperature control rod; 74-Temperature control mounting seat; 74a-Seat body; 74b-Support seat; 75-Latch pin;

81-liquid inlet orifice; 82-return orifice; 83-return water part; 84-inner pipe installation part; 85-inner flow hole;

100-delayed outlet valve; 101-water heater; 102-inlet valve; 103-pipe-in-pipe; 104-pipe-in-pipe; 105-pipe-in-pipe outer pipe; 106-delay thermostat valve; 111-hot water Pipe; 112-cold water pipe.

detailed description

The present invention will be further described below in conjunction with specific embodiments:

【Delayed Outlet Valve】

Example one:

As shown in Figures 1-3, a delayed water outlet valve for a pipe-in-pipe includes a valve body 1. The valve body 1 is provided with a liquid outlet end 11, a control end 13 and a pipe-in-pipe connection end 12, the pipe The tube-in-pipe connection end 12 is generally installed on the tube-in-tube pipeline through a tube-in-tube joint, and realizes the delayed liquid outflow of the tube-in-tube pipeline. A control end 13 is provided between the pipe-in-pipe connection end 12 and the liquid outlet end 11. The control end 13 is provided with a control valve core 17 and a handwheel 18 that drives the control valve core 17 to rotate. The valve core 17 is common on the market The ceramic valve core, ball head valve core, etc., are driven by the handwheel 18 to achieve liquid discharge control. In addition, in order to achieve the same control effect, the liquid outlet 11 may be connected to an external control valve.

In order to facilitate the installation of the inner cavity parts, the valve body 1 is arranged separately, that is, the valve body 1 includes an upper valve body 41 provided with a liquid outlet 11 and a control end 13, and a lower valve provided with a pipe-in-pipe connection end 12 The body 42 is threadedly connected. The outer side wall of the lower valve body 42 is provided with a threaded connection part 43 connecting the pipe in the pipe and a clamping part 44 that drives the rotation. The clamping part 44 is generally deformed.

As shown in Figure 2, the pipe-in-pipe connecting end 12 is provided with an inner flow passage 14 communicating with the pipe-in-pipe inner pipe 104 and an outer flow passage 15 communicating with the pipe-in-pipe outer pipe 105, and the liquid outlet end 11 passes through the valve body. 1 The inner cavity communicates with the inner flow passage 14 and the outer flow passage 15. In this embodiment, the outer diameter of the lower valve body 42 is larger than the pipe-in-pipe connection end 12, so that the damping piston 2 has a larger installation space in the lower valve body 42. The inner side of the pipe-in-pipe connection end 12 is provided with a delayed sealing portion 4 that separates the inner and outer flow passages. Specifically, the valve body 1 is provided with a connecting pipe 31 with an inner flow passage 14, and the connecting pipe 31 extends into the valve body 1. The inner cavity forms the delayed sealing portion 4, and the valve body 1 outside the connecting pipe 31 is provided with a plurality of outer liquid inlet holes 16, and the outer liquid inlet holes 16 form the outer flow passage 15.

The inner cavity of the valve body 1 is provided with a damping piston 2 and a first restoring member 3 that provides elastic force. The first restoring member 3 is preferably a spring, and the spring in this embodiment has a conical structure with a small top and a large bottom, which is beneficial for damping. Stable movement of the piston. The damping piston 2 is installed on the outer side wall or inner side wall of the delay sealing part 4, and realizes the sealing of the outer flow passage 15 or the inner flow passage 14. When the internal medium pushes the damping piston 2 to separate the delay sealing part 4, it is realized Damping the delayed liquid out of the flow channel where the piston 2 is located. In a mechanical delay valve, the length of the delay seal 4 is related to the delay time. Relatively speaking, the longer the length, the longer the delay time.

Generally, the cross-sectional area of the inner flow passage of the pipe-in-pipe pipeline is smaller than the cross-sectional area of the outer flow passage, so the outer flow passage has more water storage capacity, and the volume of cold water after cooling is also higher. In order to reduce the hot water outlet time at the outlet end, Priority is given to water outflow from the inner flow passage, that is, the damping piston 2 seals the outer flow passage. In a short time of water use, the damping piston 2 prevents or delays the discharge of cold water inside the outer flow passage to achieve the desired effect.

In order to control the delay time of the flow passage, a closed damping chamber 21 is provided in the valve body 1. Specifically, a piston guide rod 23 is provided in the valve body 1, and the piston guide rod 23 is integrally formed on the upper valve body, The damping chamber 21 is arranged between the piston guide rod 23 and the inner wall of the valve body 1, and the piston guide rod 23 is provided with an intermediate flow passage 24 that communicates the inner and outer flow passages with the liquid outlet 11. The damping chamber 21 is provided with the damping piston 2 and the first reset member 3, and the damping chamber 21 is also provided with a damping regulating flow passage communicating with the inner cavity of the valve body 1. The damping adjustment flow passage is provided with a damping adjustment hole 22a or a damping adjustment groove 22b on the piston guide rod 23/damping piston 2 or a damping gap provided between the end of the damping piston 2 and the piston guide rod 23.

As shown in FIG. 3, in this embodiment, the damping adjustment flow passage is a damping adjustment hole 22a, and the inner thread of the valve body 1 is connected with a damping adjustment piece 25, and the inner end of the damping adjustment piece 25 is tapered and is arranged on the damping adjustment hole 22a. On the regulating flow channel, the size of the damping regulating flow channel is controlled by rotating the damping adjusting member 25 to realize the adjustment of the delay time. In order to prevent impurities from entering the damping chamber 21, a filter screen 26 is arranged inside the damping adjustment flow channel, and the filter screen 26 is arranged in an annular groove in the valve body and fixed by a valve core.

In order to increase the sealing performance, the upper end of the damping piston 2 is provided with a first sealing member 27 for sealing the damping cavity 21, or/and the inner wall of the lower end of the damping piston 2 is provided with a second sealing member for sealing the delay seal 4 28.

When the hot water discharge system is not driven by a booster device such as a water pump, the medium pressure of the inner flow passage and the outer flow passage are equal, and the medium pressure at both ends of the damping piston 2 is balanced by adjusting the flow passage through damping, and there will be no extra The medium pressure acts on the first resetting part, and the first resetting part acts on the damping piston 2 to realize the sealing of the outer flow passage.

When the spool is opened, the inner flow channel flows out, the pressure in the inner flow channel drops, and the pressure in the damping chamber 21 also drops, and the balance is broken. As long as the medium pressure of the outer flow channel is greater than the elastic force of the first reset part, it will slowly Open the damping piston 2 to achieve delayed liquid discharge. In this embodiment, the moving speed of the damping piston 2 is controlled by controlling the discharge of the medium in the damping chamber 21 through the damping adjustment flow passage, and the length of the delay seal 4 is constant, so the delay time of the outer flow passage is controlled. In the non-working state, the first resetting part will not work continuously due to the pressure of the medium, which ensures the service life of the first resetting part.

Since the threaded connection cannot unify the position of each product after rotation and fixation, this leads to unstable sealing at the connection between the connecting pipe and the pipe-in-pipe, resulting in easy leakage of the inner and outer flow passages. Therefore, the outer side of the connecting pipe 31 is provided with Clamping convex ring, the clamping convex ring is provided with a sealing ring and is clamped with a movable sealing sleeve 32 and a second restoring piece 33, the second restoring piece 33 is preferably a spring, the movable sealing sleeve 32 abuts against the inner tube of the connecting pipe Installation location.

Example two

As shown in Figures 4-6, this embodiment is basically the same as the first embodiment. The difference is that the piston guide rod 23 is separately arranged in the integrally formed valve body 1. Specifically, the piston guide rod 23 has a central axis An intermediate flow channel 24 is opened to the upper end and a mounting flange is provided on the upper end. The upper end of the mounting flange abuts against the through hole of the valve body 1 and the lower end abuts the first reset member 3. The other end of the first resetting member 3 abuts against the damping piston 2, the sealing end of the damping piston 2 is provided with at least one return hole 52, and a water return sheet 53 is provided on the outside of the return hole 52. When the pressure of the inner flow channel is relatively high, the pressure relief and return flow can be achieved through the return hole 52.

Preferably, the damping adjustment channel of this embodiment is provided with a damping adjustment groove 22b on the piston guide rod 23. Although the size of the damping adjustment groove 22b has been set at the factory, the manufacturer can adjust the damping according to different sizes. The adjustment slot 22b is provided with a corresponding product model to meet the needs of different application scenarios.

Preferably, the pipe-in-pipe connecting end 12 includes a connecting sleeve 51 separately arranged at the end of the valve body 1, and the middle of the connecting sleeve 51 is provided with the delayed sealing portion 4 and forms the inner flow channel 14, and the outer circumference is provided with A plurality of outer liquid inlet holes 16 forming outer flow passages 15, and the connecting sleeve 51 abuts between the inner tube 104 in the tube and the damping piston 2. The inner end of the connecting sleeve 51 is also provided with a first installation convex ring, the installation convex ring abuts on the water return sheet 53, and forms a gap between the return water sheet 53 and the inner end of the return water sheet 53 to open and close. . The outer end of the connecting sleeve 51 is provided with a second mounting convex ring, the second mounting convex ring is sleeved on the step part of the tube-in-tube inner tube to realize the fixing and sealing functions.

Example three

As shown in Figures 7-9, this embodiment is basically the same as the first embodiment. The difference is that the piston guide rod 23 is separately arranged in the integrally formed valve body 1. Specifically, the piston guide rod 23 has a central axis A middle flow channel 24 is opened to the front, and an installation convex edge is arranged on the upper end thereof. The installation convex edge is installed on the step surface of the valve body through the valve core, and a sealing gasket is arranged between the installation convex edge and the valve core. The lower end of the piston guide rod 23 is outwardly provided with a sliding convex ring, and the sliding convex ring is provided with a damping adjustment hole 22a. The sliding convex ring reduces the friction force by reducing the contact area with the damping piston 2; at the same time, the sliding convex ring can form a gap between the damping piston 2 and the piston guide rod 23 to facilitate the damping adjustment hole 22a to drain liquid .

Embodiment four

As shown in FIGS. 10-11, this embodiment is basically the same as the third embodiment. The difference is that the damping chamber 21 and the first reset member 3 are both arranged inside the piston guide rod 23. The damping piston 2 is provided with a piston support 61. The piston support 61 includes an upper support provided in the damping chamber 21 and a lower support for installing the damping piston 2; the upper support is movably provided in the damping chamber 21 through a first seal. , The damping cavity 21 is also provided with a damping adjustment hole 22a.

For the flow of the medium, when the damping piston 2 seals the outer flow passage 15, a number of liquid passing holes 62 are opened on the piston support 61.

Embodiment five

As shown in Figure 12, this embodiment is basically the same as the fourth embodiment. The difference is that: the damping piston 2 is installed on the inner surface of the delayed seal part, that is, the inner flow channel is sealed; the other end is movably arranged on the piston guide rod In the damping cavity 21 in 23, the two ends are respectively movably sealed by the first sealing member 27 and the second sealing member 28. In order to limit the position, a limit convex ring is provided in the middle of the damping piston 2.

The mounting protrusion of the piston guide rod 23 is provided with a plurality of intermediate holes along the upper circumferential direction, and forms an intermediate flow passage 24 communicating with the liquid outlet end.

【Hot water drainage system】

A hot water discharge system includes a water heater 101, an inlet valve 102, and a pipe-in-pipe pipe 103. The end of the branch of the pipe-in-pipe pipe 103 is installed with the delays of the above-mentioned embodiments 1 to 5 through a pipe-in-pipe joint出水阀100。 100 outlet valve. The hot water pipe 111 of the water heater 101 is connected to the pipe-in-pipe pipeline 103 through the liquid inlet valve 102. The liquid inlet valve 102 here is an ordinary angle valve, and the internal and external flow passages can be communicated through the pipe-in-pipe joint. The water heater 101 is also provided with a cold water pipe 112 for replenishing water, and the cold water pipe 112 is connected to a tap water pipe.

The end of the branch can also be provided with a delayed temperature control valve 106, the basic structure of which is similar to that of the delayed water outlet valve 100, and the difference lies in:

As shown in Figs. 14-16, the middle of the pipe-in-pipe connecting end 12 is provided with a temperature control mounting seat 74, and the temperature control mounting seat 74 is provided with a temperature control device, a piston bracket 61, and a first reset member 3. Specifically, the temperature control mounting seat 74 includes a seat body 74a for installing a temperature control device. The end of the seat body 74a is extended with a number of supports 74b, and the piston bracket 61 and the first The restoring member 3, the upper end of the support 74b is also provided with a pin 75 for fixing the first restoring member 3. The piston bracket 61 is two intersecting U-shaped brackets, and the intersecting gap is just stuck on the support 74b, which can prevent it from rotating. The end of the piston bracket 61 is provided with a damping piston 2, and the first reset member 3 makes the damping piston 2 abut against the outer flow passage through the piston bracket 61.

The temperature control device includes a temperature control housing 71, and a temperature sensing medium 72 and a temperature control rod 73 are arranged in the temperature control housing 71. The temperature sensing medium 72 is preferably wax, that is, a temperature sensing wax bag. The temperature sensitive medium 72 drives the temperature control rod 73 and the temperature control housing 71 to move relative to each other through volume change, and realizes the driving of the damping piston. That is, when the valve core is opened, the inner flow channel discharges liquid first, and the small part of the cold water in the inner flow channel is discharged first, and then quickly becomes hot water after 3-5 seconds, which meets the user's demand for less water. After a period of time, when the temperature control device senses the hot water of the set temperature, the temperature control device drives the damping piston and opens the flow channel, and the hot water flow becomes larger to meet the user's demand for larger water volume. Since the volume change of the temperature-sensitive medium 72 is relatively slow, the water volume increases slowly when the damping piston is opened, which will not cause large water discharge fluctuations at the liquid discharge end.

The damping piston of this embodiment seals the outer flow channel. The pipe-in-pipe connecting end 12 includes an inner pipe mounting portion 84 connecting the pipe-in-pipe inner pipe, and a sealing ring is provided at the connection between the inner pipe mounting portion 84 and the pipe-in-pipe inner pipe to prevent leakage of the inner flow channel. The inner pipe mounting portion 84 is also provided with an inner flow channel and a number of inner flow holes 85. The inner pipe mounting portion 84 is provided with a liquid inlet hole 81 on the outer periphery, and the inner flow channel is connected through the inner flow hole 85 and the liquid inlet hole 81. Liquid end. The temperature control device is installed at the inner end of the inner tube mounting portion 84, and the piston bracket 61 passes through the liquid inlet hole 81 to connect to the outer damping piston 2.

In addition, when the valve core is closed, the medium pressures of the inner flow passage and the outer flow passage are equal. When the damping piston 2 is sealed, the pressure of the inner flow passage on one side and the pressure of the outer flow passage on the other side are exactly offset, making the damping piston 2 two The medium pressure at the end is balanced and will not additionally act on the first resetting member. The first resetting member can lightly dampen the piston 2 to achieve the sealing of the outer flow channel, which increases the service life of the first resetting member. In order to ensure the control effect of the temperature control device, the elastic force provided by the first resetting member will be greater than the internal medium pressure to prevent the pressure drop when the inner flow passage opens and the outer flow passage automatically opens.

In this embodiment, the outer flow channel is formed by the inner tube mounting portion 84 and the inner cavity of the pipe-in-tube pipe joint. The damping piston 2 is sleeved in the inner tube mounting portion 84, and its outer side wall protrudes outward to form a piston blocking portion. The blocking part abuts on the step surface of the pipe joint in the pipe and realizes a limit seal.

Preferably, the side wall of the damping piston 2 is provided with at least one return hole 82, and the sealing end of the damping piston 2 is provided with a water return portion 83. When the water pressure in the inner flow channel is too high, the pressure relief and return flow can be achieved through the return orifice 82 and the return portion 83.

In order to facilitate the installation of the inner cavity parts, the valve body 1 is arranged separately, that is, the valve body 1 includes an upper valve body provided with a liquid outlet 11 and a control end 13, and a lower valve body provided with a pipe-in-pipe connection end 12 , The two are threadedly connected, and the outer side wall of the lower valve body is provided with a threaded connection portion 43 connecting the pipe in the pipe and a clamping portion 44 that drives the rotation thereof.

In addition, in the temperature-controlled delay valve, because the delay time is controlled by the temperature control device, there is no need to control the time by the delay seal 4, so the delay seal 4 here refers to the one that can make the damping piston 2 seal the flow path. The location can be a flat surface or an inner and outer side wall. In this embodiment, the delayed sealing portion 4 is the outer side wall of the inner tube mounting portion 84 and the inner side wall of the pipe joint in the pipe.

Preferably, the cold water pipe 112 can also be connected to the end of the main branch of the pipe-in-pipe pipeline through a three-way joint to realize hot water circulation.

The foregoing embodiments are only preferred embodiments of the present invention, and do not limit the scope of protection of the present invention accordingly. Therefore: all equivalent changes made in accordance with the structure, shape, and principle of the present invention shall be covered by the protection of the present invention. Within range.

Claims

A delayed water outlet valve for a pipe-in-pipe, comprising a valve body (1), the valve body (1) is provided with a liquid outlet end (11) and a pipe-in-pipe connection end (12), and is characterized in that: the pipe The connecting end (12) of the middle tube is provided with an inner flow channel (14) of the inner tube (104) of the connecting tube and an outer flow channel (15) of the outer tube (105) of the connecting tube. Connect the inner flow passage (14) and the outer flow passage (15) through the inner cavity of the valve body (1);

The inner side of the pipe-in-pipe connecting end (12) is provided with a delayed sealing portion (4), and the inner cavity of the valve body (1) is provided with a damping piston (2) and a first reset piece (3) that provides elasticity. The damping piston (2) is installed on the outer side wall or the inner side wall of the delayed sealing part (4), and realizes the sealing of the outer flow passage (15) or the inner flow passage (14);

When the internal medium pushes the damping piston (2) to separate the delayed sealing part (4), the delayed liquid discharge of the flow channel where the damping piston (2) is located is realized.
The delayed water outlet valve for a pipe-in-pipe according to claim 1, wherein the valve body (1) is provided with a damping chamber (21), and the damping chamber (21) is provided with the damping chamber (21). The piston (2) and the first resetting part (3), the damping chamber (21) is also provided with a damping regulating flow passage communicating with the inner cavity of the valve body (1).
The delayed water outlet valve for a pipe-in-pipe according to claim 2, characterized in that: the valve body (1) is provided with a piston guide rod (23), and the piston guide rod (23) is provided with a connection between the inside and the outside. The middle flow channel (24) between the flow channel and the liquid outlet (11); the damping chamber (21) is arranged between the piston guide rod (23) and the inner wall of the valve body (1), or the piston guide rod (23) internal.
The delayed water outlet valve for a pipe-in-pipe according to claim 3, characterized in that: the damping adjustment flow passage is provided with a damping adjustment hole ( 22a) or the damping adjustment groove (22b), or, is a damping gap provided between the end of the damping piston (2) and the piston guide rod (23).
The delayed water outlet valve for a pipe-in-pipe according to any one of claims 2-4, characterized in that: the valve body (1) is provided with a damping adjustment member (25), and the damping adjustment member (25) The inner end of) is set on the above-mentioned damping adjustment flow passage, and the size of the damping adjustment flow passage is controlled to realize the adjustment of the delay time.
The delayed water outlet valve for a pipe-in-pipe according to claim 5, characterized in that: a filter screen (26) is arranged inside the damping regulating flow passage.
The delayed water outlet valve for pipe-in-pipe according to claim 1, characterized in that: the valve body (1) is provided with a connecting pipe (31) with an inner flow channel (14), and the connecting pipe ( 31) Extending into the inner cavity of the valve body (1) to form the delay sealing portion (4); the valve body (1) outside the connecting pipe (31) is provided with a number of outer liquid inlet holes (16), the outer The liquid inlet hole (16) forms the outer flow channel (15).
The delayed water outlet valve for a pipe-in-pipe according to claim 7, characterized in that: the outer side of the connecting pipe (31) is clamped with a movable sealing sleeve (32) and a second reset piece (33), The movable sealing sleeve (32) is used for connecting the tube-in-tube inner tube.
The delayed water outlet valve for a pipe-in-pipe according to claim 1, characterized in that: a control end (13) is provided between the pipe-in-pipe connection end (12) and the liquid outlet end (11), The control end (13) is provided with a control valve core (17) and a hand wheel (18) that drives the control valve core (17) to rotate;

The valve body (1) includes an upper valve body (41) provided with a liquid outlet end (11) and a control end (13), and a lower valve body (42) provided with a pipe-in-pipe connection end (12). The outer side wall of the lower valve body (42) is provided with a threaded connection part (43) for connecting the pipe in the pipe and a clamping part (44) for driving the rotation of the threaded connection part (43).
The delayed water outlet valve for a pipe-in-pipe according to any one of claims 1-4 or 9, characterized in that: the pipe-in-pipe connection end (12) comprises a separate body (1) provided on the valve body (1). The connecting sleeve (51) at the end, the middle of the connecting sleeve (51) is provided with the delay seal (4) and forms an inner flow channel (14), and its outer periphery is provided with a number of outer liquid inlets forming outer flow channels (15) A hole (16), the connecting sleeve (51) abuts between the tube-in-tube inner tube (104) and the damping piston (2).
The delayed water outlet valve for a pipe-in-pipe according to claim 12, characterized in that: the sealing end of the damping piston (2) is provided with at least one return hole (52), the return hole (52) A water return piece (53) is provided on the outer side of the battery.
The delayed water outlet valve for a pipe-in-pipe according to any one of claims 1-4 or 9, characterized in that: the damping piston (2) is provided with a piston support (61), and the piston support (61) Including an upper bracket arranged in the damping chamber (21) and a lower bracket installed with the damping piston (2); when the damping piston (2) seals the outer flow channel (15), the piston bracket (61) is provided with a fluid Hole (62).
A hot water discharge system, comprising a water heater (101), an inlet valve (102) and a pipe-in-pipe pipe (103), characterized in that: the end of the branch of the pipe-in-pipe pipe (103) passes through the pipe The pipe joint is equipped with a delayed water outlet valve (100) as described in any one of 1-12.
The delayed water outlet valve for pipe-in-pipe according to claim 13, characterized in that: the valve body (1) is also provided with a temperature control device, when the temperature control device senses hot water, the The temperature control device drives the damping piston (2) and opens the flow channel;

The temperature control device includes a temperature control housing (71), a temperature sensing medium (72) and a temperature control rod (73) are arranged in the temperature control housing (71), and the temperature sensing medium (72) drives the temperature control rod ( 73) and the temperature control housing (71) move relative to each other, and realize the driving of the damping piston.