Passive differential pressure in-line tube outflow system

Abstract

The present application belongs to the technical field of domestic water, and particularly relates to a passive differential pressure type pipe-in-pipe liquid outlet system. The system comprises a main pipe, a total water inlet valve, a plurality of branches, a differential pressure liquid inlet valve core, a plurality of differential pressure liquid outlet valve cores and a plurality of water outlet devices. When one or more of the branches are opened, due to the existence of the differential pressure liquid inlet valve core and the differential pressure liquid outlet valve core, a pressure difference is generated between the inner flow channel and the outer flow channel, the pressure of the inner flow channel is higher than that of the outer flow channel, so that in the remaining branches, the liquid in the inner flow channel can flow back to the outer flow channel through the liquid outlet end of the corresponding pipe, and finally flow out through the liquid outlet end of the pipe with the water outlet device opened. The internal water of all branches of the system can flow at any time, preventing the occurrence of dead water and deteriorated water.

Description

Technical Field

[0001] The invention belongs to the technical field of domestic water, and in particular relates to a passive pressure differential type pipe-in-pipe liquid outlet system. Background Art

[0002] At present, with the gradual improvement of living standards, people pay more and more attention to the quality of drinking water.

[0003] The pipes used for domestic water in ordinary households generally consist of a main pipe entering the house and multiple branches that are divided into various rooms. As we all know, when a branch pipe is discharging water, the water inside the pipe generally only passes through the main pipe and the branch pipe to reach the user end. There is generally no water flow in other branches. The main pipe that passes through generally only forms a flow in the area where the water inlet end reaches the connection end of the branch pipe, and there is no water flow in the main pipe at the end. This causes the water in the branch pipe that has not been used for a long time to remain in the pipe and gradually deteriorate. When it is used next time, some of the water that comes out is deteriorated. Long-term consumption of such deteriorated water will endanger the health of the user. Summary of the Invention

[0004] The object of the present invention is to provide a passive pressure differential tube-in-tube liquid discharge system with a simple structure.

[0005] The object of the present invention is achieved like this:

[0006] A passive pressure differential type pipe-in-pipe liquid outlet system, comprising: a main pipe having an inner main channel and an outer main channel, wherein the liquid inlet ends of the inner main channel and the outer main channel are connected to each other and form a pipe liquid inlet end;

[0007] A main water inlet valve, installed on the liquid inlet end of the pipeline, for the tap water pipe;

[0008] A plurality of branches are distributed on the main pipeline and have inner branch flow channels and outer branch flow channels, the ends of the inner branch flow channels and the outer branch flow channels are connected to each other and form a liquid outlet end of the pipeline; the inner branch flow channels and the inner main flow channel are connected to each other to form an inner flow channel, and the outer branch flow channels and the outer main flow channel are connected to each other to form an outer flow channel;

[0009] A pressure differential liquid inlet valve core is provided at the liquid inlet end of the pipeline and is used to increase the liquid inlet resistance at the liquid inlet end of the outer main flow channel;

[0010] A plurality of pressure differential liquid outlet valve cores are provided on corresponding branches and are used to increase the liquid outlet resistance at the liquid outlet end of the inner branch flow channel; and

[0011] Several water outlet devices are installed at the corresponding liquid outlet ends of the pipelines;

[0012] Among them, when the water outlet device of one or more branches is opened, a pressure difference will be generated between the inner flow channel and the outer flow channel, and the pressure of the inner flow channel will be higher than the pressure of the outer flow channel, so that in the remaining branches, the liquid in the inner flow channel can flow back to the outer flow channel through the corresponding liquid outlet end of the pipeline, and finally flow out through the liquid outlet end of the pipeline with the water outlet device opened.

[0013] Preferably, the pressure differential liquid inlet valve core includes a liquid inlet valve plate installed at the liquid inlet end of the outer main flow channel, and the liquid inlet valve plate is an annular diaphragm.

[0014] Preferably, the pressure differential liquid inlet valve core includes a liquid inlet valve body, a liquid inlet valve plate and a liquid inlet spring installed at the liquid inlet end of the outer main channel. A liquid inlet hole is opened in the liquid inlet valve body, and the liquid inlet valve plate is movably arranged on the liquid inlet hole through the liquid inlet spring.

[0015] Preferably, the liquid inlet valve plate is provided with a liquid inlet guide channel communicating with the inside and outside.

[0016] Preferably, the pressure differential liquid outlet valve core includes a liquid outlet support frame and a liquid outlet valve plate arranged on the liquid outlet support frame, the liquid outlet valve plate is arranged at the liquid outlet end of the inner branch flow channel, and at least one liquid outlet diversion channel is provided at the end of the liquid outlet valve plate.

[0017] Preferably, the pressure differential liquid outlet valve core further includes a liquid outlet spring, and the liquid outlet spring is arranged between the liquid outlet support frame and the liquid outlet valve plate.

[0018] Preferably, a three-way pipe joint is provided on the branch line, the three-way pipe joint having two joint mounting portions for connecting pipes in pipes, a joint inner tube provided between the two joint mounting portions, and a valve assembly portion, an inner flow channel being formed inside the joint inner tube, and an outer flow channel being formed outside the joint inner tube;

[0019] A partition is provided in the valve assembly portion, which is used to form two partition channels. One end of the two partition channels is provided in the valve assembly portion, and the other ends of the two partition channels are respectively connected to the internal flow channels of the corresponding joint mounting portions; the liquid outlet valve plate is provided at one end of at least one of the partition channels.

[0020] Preferably, the partition portion includes an extension wall connecting the joint inner tube and the valve fitting portion, and an inner partition plate provided in the extension wall, the inner partition plate being used to partition the inner flow channel.

[0021] Preferably, a water pump is provided on the main line or the branch line, the liquid inlet end of the water pump is connected to the inner flow channel, the liquid outlet end of the water pump is connected to the outer flow channel, and a check valve is provided.

[0022] Preferably, the water outlet device is configured as a visual water outlet valve, which includes a water outlet valve body, the water outlet valve body having a first liquid inlet end, a first liquid outlet end and a first control end connecting the two, a water outlet control valve core is provided in the first control end, a perspective window is provided on the side wall of the first liquid inlet end, a perspective seal is provided in the perspective window, and a water flow visual object is provided in the perspective seal, and when water flows through, the water flow visual object will move accordingly.

[0023] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0024] When the water outlet device of one or more branches is opened, due to the existence of the pressure differential liquid inlet valve core and the pressure differential liquid outlet valve core, a pressure difference will be generated between the inner flow channel and the outer flow channel, and the pressure of the inner flow channel will be higher than the pressure of the outer flow channel, so that in the remaining branches, the liquid in the inner flow channel can flow back to the outer flow channel through the corresponding liquid outlet end of the pipeline, and finally flow out through the liquid outlet end of the pipeline of the open water outlet device. The internal water of all branches of the system can flow at any time to prevent the occurrence of stagnant water or deteriorated water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the pressure differential type pipe-in-pipe liquid outlet pipeline system of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the first pressure differential liquid inlet valve core of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the second pressure differential liquid inlet valve core of the present invention.

[0028] Figure 4 This is a schematic diagram of the first pressure differential liquid outlet valve core and its installation structure of the present invention.

[0029] Figure 5 This is a schematic diagram of the second pressure differential liquid outlet valve core and its installation structure of the present invention.

[0030] Figure 6 It is a schematic diagram of the system structure of the present invention in which a water pump and a concealed pressure differential liquid outlet valve core are installed.

[0031] Figure 7 It is a schematic diagram of the water pump installation structure of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the first concealed pressure differential liquid outlet valve core of the present invention.

[0033] Figure 9 It is a structural schematic diagram of the second concealed pressure differential liquid outlet valve core of the present invention.

[0034] Figure 10It is a structural schematic diagram of the first visual water outlet valve of the present invention.

[0035] Figure 11 It is a structural schematic diagram of the second visual water outlet valve of the present invention.

[0036] Figure 12 It is a structural schematic diagram of another main water inlet valve with a built-in pressure differential liquid inlet valve core of the present invention.

[0037] The meaning of the numbers in the figure:

[0038] 1- Main line; 2- Branch line; 3- Pressure differential inlet valve core; 4- Pressure differential outlet valve core; 5- Water outlet equipment; 6- Water pump; 7- Main water inlet valve;

[0039] 11 - Liquid inlet end of pipeline; 12 - Inner flow channel; 13 - Outer flow channel; 14 - End pipe joint; 141 - Pipe-in-pipe mounting end; 142 - Threaded mounting end; 143 - Inner pipe of joint; 1431 - Second mounting surface; 144 - Outer pipe of joint; 15 - Water pump mounting pipe joint;

[0040] 21 - liquid outlet of pipeline; 22 - three-way pipe joint; 221 - joint installation part; 222 - valve assembly part; 223 - separation channel; 224 - separation part; 2241 - extension wall; 2242 - inner separation plate; 23 - common joint;

[0041] 31-liquid inlet valve body; 32-liquid inlet hole; 33-liquid inlet valve plate; 331-external extension; 332-inner extension; 34-liquid inlet spring; 35-liquid inlet guide channel; 36-fixing ring;

[0042] 41-liquid outlet support frame; 411-connecting rod; 42-liquid outlet valve plate; 43-liquid outlet diversion channel; 44-liquid outlet spring;

[0043] 52-Visual water outlet valve; 521-Water outlet valve body; 522-Perspective seal; 523-Water flow visual object; 524-Visual object mounting bracket; 525-Drive shaft; 526-Power impeller; 527-Sealing ring.

[0044] 61-check valve;

[0045] 71-stop valve body; 711-total liquid inlet end; 712-total control end; 713-total liquid outlet end; 714-stop inner tube; 72-stop valve cover; 73-stop valve core; 731-connecting rod; 732-handwheel; 733-lifting platform; 734-sealing gasket. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with specific embodiments:

[0047] like Figure 1As shown, a pressure differential type pipe-in-pipe liquid outlet pipeline system includes a main pipeline 1, a plurality of branch pipelines 2, a pressure differential liquid inlet valve core 3, a plurality of pressure differential liquid outlet valve cores 4 and a plurality of water outlet devices 5.

[0048] The main body of the main line 1 and the several branches 2 are composed of a pipe-in-pipe and a pipe-in-pipe joint. The pipe-in-pipe includes an inner pipe, an outer pipe and a connecting portion arranged between the inner pipe and the outer pipe. The inner pipe and the outer pipe are coaxially arranged so that an inner flow channel is formed inside the inner pipe and an outer flow channel is formed between the inner pipe and the outer pipe. Similarly, the pipe-in-pipe joint includes a joint inner pipe 143, a joint outer pipe 144 and a joint connecting portion arranged between the joint inner pipe and the joint outer pipe, which is used to connect the pipe-in-pipe and the pipe-in-pipe accessories. The pipe-in-pipe joint can be divided into two-way type, three-way type, four-way type, etc. according to the number of joints; and can be divided into straight-through type, elbow type, etc. according to the shape. In addition, the specific structure of the pipe-in-pipe and the pipe joint can be detailed in the utility model patent with authorization announcement number CN207922346U.

[0049] In this embodiment, the main pipeline 1 has an inner main channel and an outer main channel. The liquid inlet ends of the inner main channel and the outer main channel are connected to each other and form a pipeline liquid inlet end 11. The pipeline liquid inlet end 11 is installed with a total water inlet valve 7 for connecting to a tap water pipe. The total water inlet valve 7 is an ordinary angle valve, which is equivalent to the main control valve of this system. When the total water inlet valve 7 is opened, the inner main channel and the outer main channel are connected to the tap water pipe.

[0050] To facilitate installation, the pipeline's liquid inlet end 11 is equipped with an end fitting 14, a type of pipe-in-pipe fitting used to connect the pipe-in-pipe to other equipment. This end fitting 14 includes at least one pipe-in-pipe mounting end 141 for connecting to the pipe-in-pipe and at least one threaded mounting end 142 for connecting to other equipment. The pipe-in-pipe mounting end 141 can be connected to the pipe-in-pipe through methods such as heat fusion, snap-fitting, or threaded connection. The threaded mounting end 142 typically incorporates an internally threaded metal insert at the end of the outer pipe of the fitting. The main water inlet valve 7 is mounted on this metal insert.

[0051] The number of branches 2 is distributed on the main line 1 according to the needs of the room. Each branch has an inner branch flow channel and an outer branch flow channel. The ends of the inner branch flow channel and the outer branch flow channel are connected to each other and form a pipeline liquid outlet end 21. The pipeline liquid outlet end 21 is also provided with an end pipe joint 14 to facilitate the installation of water outlet equipment 5 such as a visual water outlet valve 52.

[0052] The inner branch flow channel and the inner main flow channel are interconnected to form the inner flow channel 12 of the system, and the outer branch flow channel and the outer main flow channel are interconnected to form the outer flow channel 13 of the system. The liquid inlet ends of the inner main flow channel and the outer main flow channel are the liquid inlet ends of the inner flow channel 12 and the outer flow channel 13, respectively, and the liquid outlet ends of the inner branch flow channel and the outer branch flow channel are the liquid outlet ends of the inner flow channel 12 and the outer flow channel 13.

[0053] The pressure differential liquid inlet valve core 3 is arranged at the liquid inlet end 11 of the pipeline, and is used to increase the liquid inlet resistance of the liquid inlet end of the outer main flow channel.

[0054] A plurality of differential pressure liquid outlet valve cores 4 are arranged on the corresponding branches 2 to increase the liquid outlet resistance at the liquid outlet end of the inner branch flow channel, so as to achieve preferential liquid outlet of the outer flow channel.

[0055] When all the water outlet devices 5 are not opened, the inner flow channel 12 and the outer flow channel 13 are interconnected at the ends of each branch, and therefore are in a balanced state, that is, an isobaric state.

[0056] When the water outlet device 5 of one or more branches 2 is opened, due to the presence of the pressure differential liquid inlet valve core 3 and the pressure differential liquid outlet valve core 4, a pressure difference will be generated between the inner flow channel 12 and the outer flow channel 13, and the pressure of the inner flow channel 12 will be higher than the pressure of the outer flow channel 13, so that in the remaining branches 2, the liquid in the inner flow channel 12 can flow back to the outer flow channel 13 through the corresponding pipeline outlet end 21, and finally flow out by opening the pipeline outlet end 21 of the water outlet device 5. The internal water of all branches of the system can flow at any time to prevent the occurrence of stagnant water or deteriorated water.

[0057] Specifically, when the water outlet device 5 of one or more branches 2 is opened, water will flow out of the inner and outer main channels of the outlet branch simultaneously. However, due to the presence of the pressure differential outlet valve core 4, the water outflow of the inner channel 12 is limited to a certain extent. At the outlet end 21 of the outlet branch, water flows out of the outer channel 13 more easily than the inner channel 12. Therefore, the pressure in the outer channel 13 is relieved more quickly, and the pressure in the outer channel 13 is lower than that in the inner channel 12, thereby generating a passive pressure differential.

[0058] Because the pressure differential inlet valve core 3 restricts water from entering the outer flow channel 13 from the liquid inlet end, another portion of the water in the outer flow channel 13 comes from other unopened branches. That is, in other unopened branches, the pressure differential and the connectivity of the liquid outlet end 21 of the branch pipe allow water in the inner branch flow channel of the unopened branch to enter the outer main flow channel through the outer branch flow channel of the branch, and finally flow out through the outer branch flow channel of the outlet branch. The water flowing out of the inner branch flow channel of the outlet branch directly comes from the inner main flow channel of the main pipe.

[0059] In this way, as long as any branch is in use in the water outlet device 5, the inner branch flow channels and outer branch flow channels of other branches are all involved in the liquid discharge, which can ensure that there is no dead water point in the entire system, greatly ensuring water safety.

[0060] When the water outlet device 5 is closed, since the inner flow channel 12 and the outer flow channel 13 are interconnected at the end, they will quickly reach an equilibrium state, that is, an isobaric state.

[0061] It should be noted that the pipeline resistance generated by the pressure differential inlet valve core 3 and the pressure differential outlet valve core 4 is not very large, being far less than the pressure of tap water, and thus does not cause excessive internal friction, thus ensuring the normal operation of the inner and outer flow channels. The water at the outlet end 21 of all pipelines primarily enters the inner and outer flow channels through the pipeline inlet end 11 of the main pipeline 1 and is discharged directly through the main pipeline and the branch. A small amount of water comes from nearby closed branches.

[0062] like Figure 1 As shown, it is assumed that this embodiment has one main line and four branches, and the four branches are branch No. ①, branch No. ②, branch No. ③ and branch No. ④.

[0063] When the outlet device 5 of branch line 4 is turned on, the water in the inner flow channel 12 of branch line 4 comes from the inner flow channel 12 of main line 1. The water in the outer flow channel 13 of branch line 4 comes from the liquid inlet end of the outer flow channel 13 of main line 1 and the outer flow channels 13 of branches 1, 2, and 3. The water in the outer flow channels 13 of branches 1, 2, and 3 comes from the inner flow channels 12 of the corresponding branches and the inner flow channel 12 of main line 1.

[0064] like Figure 6-7 As shown, when there are many branches, the present invention can also be provided with a water pump to perform pressurized water supply.

[0065] Specifically, a water pump 6 and a water pump mounting pipe joint 15 are provided on the main line 1 or branch line 2. The water pump mounting pipe joint 15 is a type of pipe joint, which is a three-way valve, including a T-shaped pipe-in-pipe and a pipe-out-pipe, and simultaneously forming two pipe-in-pipe mounting ends 141 for mounting a pipe-in-pipe, and a threaded mounting end 142 for mounting the water pump. The liquid inlet end of the water pump 6 is connected to the internal flow channel 12 of the main line 1, and the liquid outlet end of the water pump 6 is connected to the external flow channel 13 of the main line 1. A check valve 61 is provided at the liquid outlet end of the water pump.

[0066]

Pressure differential liquid inlet valve core

[0067] The differential pressure inlet valve core 3 is arranged at the pipeline inlet end 11 of the main pipeline 1 , that is, arranged in the end pipe joint 14 .

[0068] Example 1 of the pressure differential liquid inlet valve core:

[0069] like Figure 2 As shown, the pressure differential liquid inlet valve core 3 includes a liquid inlet valve body 31 installed at the liquid inlet end of the outer main flow channel, a liquid inlet valve plate 33 and a liquid inlet spring 34.

[0070] The liquid inlet valve body 31 is annular, and an outer ring is provided with an external threaded portion for connecting to the threaded mounting end 142 of the end pipe joint 14; an inner ring is provided with a sealing convex ring, and the liquid inlet hole 32 is formed in the sealing convex ring.

[0071] The inlet valve disc 33 is movably mounted on the inlet hole 32 via the inlet spring 34. Specifically, the sealed end of the inlet valve disc 33 extends outward to form an outer extension 331. The outer extension 331 is preferably an annular outer flange structure perpendicular to the main body of the inlet valve disc 33. The outer extension 331 is located within the outer main flow channel. The mounting end of the inlet valve disc 33 extends inward to form an inner extension 332. The outer sidewall of the inner tube 143 of the end pipe connector 14 is provided with a second mounting surface 1431. One end of the inlet spring 34 abuts the inner extension 332, and the other end abuts the second mounting surface 1431, allowing the outer extension 331 to abut the sealing convex ring of the inlet valve body 31. When liquid is discharged from the end of the branch channel, water enters the main water inlet valve 7. The water in the outer flow channel can overcome the force of the inlet spring 34, opening the outer flow channel, thereby increasing the liquid inlet resistance of the outer flow channel.

[0072] The liquid inlet valve plate 33 or the liquid inlet valve body 31 is provided with a liquid inlet guide channel 35 communicating with the inside and outside, so as to facilitate the flow of small amounts of liquid.

[0073] Example 2 of the pressure differential liquid inlet valve core:

[0074] like Figure 3 As shown, the pressure differential liquid inlet valve core 3 includes a liquid inlet valve plate 33 installed at the liquid inlet end of the outer main flow channel, and the liquid inlet valve plate 33 is an annular diaphragm.

[0075] The outer ring of the liquid inlet valve disc 33 is mounted on the inner wall of the liquid outlet end of the main water inlet valve 7 via a fixing ring 36. The inner ring of the liquid inlet valve disc 33 abuts against the outer wall of the joint inner tube 143 of the end pipe joint 14 through its own structure. The inner ring of the liquid inlet valve disc 33 defines a liquid inlet guide channel 35 that communicates with the inside and outside. The liquid inlet guide channel 35 comprises a plurality of small liquid inlet holes.

[0076] When liquid flows out of the outer flow channel, the water flow will overcome the force of the liquid inlet valve plate 33, causing the liquid inlet valve plate 33 to deform and open the outer flow channel; after the liquid flow stops, the liquid inlet valve plate 33 can rely on its own elastic force to reset and seal the outer flow channel again.

[0077] In addition, the liquid inlet valve plate 33 can also be directly installed on the inner wall of the joint outer tube 144 of the end pipe joint 14.

[0078]

Pressure differential liquid outlet valve core

[0079] The differential pressure liquid outlet valve core 4 is arranged at the liquid outlet end 21 of the branch line 2 , that is, arranged in the end pipe joint 14 .

[0080] Example 1 of the pressure differential liquid outlet valve core:

[0081] like Figure 4 As shown, the pressure differential liquid outlet valve core 4 includes a liquid outlet support frame 41 and a liquid outlet valve plate 42 provided on the liquid outlet support frame 41 .

[0082] The main body of the liquid outlet support frame 41 is a ring-shaped skeleton structure, and its outer ring is provided with an external thread for installation on the threaded mounting end 142 of the end pipe joint 14; a connecting rod 411 is provided in the middle of its inner ring, and a liquid outlet valve plate 42 is provided at the end of the connecting rod 411. The liquid outlet valve plate 42 is conical, and a connecting mounting hole is provided at the top. The end of the connecting rod 411 is provided with a mounting groove adapted to the connecting mounting hole, and the liquid outlet valve plate 42 is fixed to the connecting rod 411 through the connecting mounting hole.

[0083] The liquid outlet valve plate 42 is arranged at the liquid outlet end of the inner branch flow channel, and achieves sealing of the inner flow channel through its own elastic force.

[0084] At least one liquid outlet guide channel 43 is provided at the end of the liquid outlet valve plate 42. The liquid outlet guide channel 43 is a plurality of liquid outlet holes opened on the outer circle of the liquid outlet valve plate 42 to facilitate the flow of liquid between the inner and outer flow channels.

[0085] Example 2 of the pressure differential liquid outlet valve core:

[0086] like Figure 5 As shown, the pressure differential liquid outlet valve core 4 includes a liquid outlet support frame 41, a liquid outlet valve plate 42 arranged on the liquid outlet support frame 41, and a liquid outlet spring 44. The liquid outlet spring 44 is arranged between the liquid outlet support frame 41 and the liquid outlet valve plate 42. The liquid outlet valve plate 42 seals the inner flow channel of the branch.

[0087] Specifically, the liquid outlet support frame 41 is integrally formed with the liquid inlet end of the water outlet device 5, or is threadedly connected to the threaded mounting end 142 of the end pipe connector 14. To avoid affecting water flow, the liquid outlet support frame 41 is a skeletal structure. A first mounting hole is provided in the center of the liquid outlet support frame 41 for mounting the liquid outlet valve plate 42. The liquid outlet valve plate 42 is rod-shaped and movably disposed within the first mounting hole. The sealing end of the liquid outlet valve plate 42 is a conical surface, which is used to seal the liquid outlet end of the inner flow channel of the branch 2.

[0088] The liquid outlet guide channel 43 is formed on the conical surface of the liquid outlet valve plate 42 . The liquid outlet guide channel 43 is a plurality of strip-shaped grooves formed on the conical surface.

[0089]

Hidden differential pressure outlet valve core

[0090] Example 1 of the hidden pressure differential liquid outlet valve core:

[0091] like Figure 6 、 8 As shown, the branch 2 is provided with a hidden pressure differential liquid outlet valve core and a common joint 23. The hidden pressure differential liquid outlet valve core is installed on the branch 2 through a three-way pipe joint 22 and is located inside the wall to increase the resistance of the liquid outflow in the inner flow channel; the common joint 23 is set outside the wall and directly installed with water outlet equipment 5 such as a shower.

[0092] The three-way pipe joint 22 has two joint installation parts 221 for connecting pipes in pipes, a joint inner tube arranged between the two joint installation parts 221, and a valve assembly part 222 for installing the pressure differential liquid outlet valve core 4. An inner flow channel is formed in the joint inner tube and is connected to the inner flow channel 12 of the branch 2; an outer flow channel is formed on the outer side of the joint inner tube and is connected to the outer flow channel 13 of the branch 2.

[0093] The partition portion 224 includes an extension wall 2241 that connects the connector inner tube and the valve assembly portion 222, and an inner partition plate 2242 disposed within the extension wall 2241. The inner partition plate 2242 is used to separate the inner flow channel and divide the inner flow channel of the tee pipe connector 22 into two parts. The partition portion is located within the valve assembly portion 222, so that the valve assembly portion 222 is provided with a separation channel 223 that respectively connects to the inner flow channel 12 of the corresponding connector mounting portion 221. The two parts are connected to each other through the valve assembly portion 222. Specifically, one end of each separation channel 223 is disposed within the valve assembly portion 222, and the other end of each separation channel 223 connects to the inner flow channel 12 of the corresponding connector mounting portion 221.

[0094] The concealed pressure differential liquid outlet valve core 4 includes a liquid outlet support frame 41 , a liquid outlet spring 44 and a liquid outlet valve plate 42 .

[0095] The liquid outlet support frame 41 is similar to a valve cover, which is sealed and arranged at the outer end of the valve assembly part 222, and the liquid outlet valve plate 42 and the liquid outlet spring 44 are installed in the valve assembly part 222, and one end of the liquid outlet spring 44 abuts against the liquid outlet valve plate 42 and the other end abuts against the liquid outlet support frame 41.

[0096] The liquid outlet valve plate 42 has an annular guide side wall portion and a sealing bottom located at one end of the guide side wall portion. The guide side wall portion extends into the inner cavity of the liquid outlet support frame 41 and moves along the inner wall of the liquid outlet support frame 41. The sealing bottom is a plane. The sealing bottom of the liquid outlet valve plate 42 is arranged on at least one of the separation channels 223 and is used to limit the flow of liquid in the inner flow channel.

[0097] The sealing bottom of this embodiment mainly seals a separation channel 223, such as Figure 8 As shown, it mainly seals the left partition channel 223. To facilitate reverse flow in the inner channel, a liquid outlet guide channel 43 is opened at the bottom of the seal. The liquid outlet guide channel 43 is an opening that faces the other partition channel 223, i.e., the right partition channel 223. At the same time, a portion of the liquid outlet guide channel 43 is also located in the left partition channel 223, thereby forming a small reflux channel.

[0098] Example 2 of the hidden pressure differential liquid outlet valve core:

[0099] like Figure 9 As shown, the structure of this embodiment is basically the same as the embodiment 1 of the hidden pressure differential liquid outlet valve core, the difference being that the diameter of the liquid outlet valve plate 42 is adapted to the diameter of a partition channel 223, and is movably arranged on the partition channel 223 on the left, thereby increasing the liquid outlet resistance of the inner flow channel.

[0100]

Visual water outlet valve

[0101] Visual water outlet valve embodiment 1:

[0102] like Figure 10 As shown, the water outlet device 5 is provided with a visual water outlet valve 52, which includes a water outlet valve body 521. The water outlet valve body 521 has a first liquid inlet end, a first liquid outlet end, and a first control end connecting the two. The first control end is provided with a water outlet control valve core. The side wall of the first liquid inlet end is provided with a perspective window, which is a plurality of circumferentially arranged small holes. The perspective window is provided with a perspective seal 522. The perspective seal 522 is made of transparent glass or plastic. The perspective seal 522 is provided with a water flow visual object 523. When water flows through, the water flow visual object 523 will move accordingly.

[0103] The perspective sealing member 522 may be integrally formed in the perspective window, or may be mounted on the water outlet valve body 521 by a threaded connection and sealed by a sealing ring.

[0104] Specifically, the see-through seal 522 is annular and comprises a sealing section and an externally threaded connection section. An internally threaded connection portion is formed on the inner wall of the first liquid inlet end, to which the see-through seal 522 is secured via the externally threaded connection section. The sealing section is positioned on the inner wall of the outlet valve body 521, where the see-through window is located. Seal rings 527 are positioned above and below the inner wall of the outlet valve body 521, where the see-through window is located. These seal rings 527 abut between the outlet valve body 521 and the sealing section of the see-through seal 522 to prevent leakage through the see-through window.

[0105] like Figure 10 As shown, the water flow visual object 523 is in the shape of a strip, one end of which can be fixed on the water outlet valve body 521, or fixed near the pipeline where the water outlet valve body 521 is installed; the other end can move freely with the water flow.

[0106] The water flow visual object 523 may also be provided with a mark that can attract the user's attention, such as a reflective mark.

[0107] The water flow visual object 523 is designed to be spiral or S-shaped for better effect. When water flows through, the water flow visual object 523 will shake, which is more conducive to observing the existence of water flow.

[0108] Visual water outlet valve embodiment 2:

[0109] like Figure 11 As shown, the structure of this embodiment is basically the same as that of the visual water outlet valve embodiment 1, and the difference is that:

[0110] The water flow visible object 523 is a marking wheel.

[0111] Specifically, the first liquid inlet end of the outlet valve body 521 is provided with a visible object mounting bracket 524 . When the visible object mounting bracket 524 is separately provided on the perspective window, it is integrally provided with the perspective seal 522 , or it can be separately provided with the perspective seal 522 .

[0112] A transmission shaft 525 is rotatably mounted in the middle of the visual object mounting bracket 524. One end of the transmission shaft 525 is located within the first liquid inlet and is provided with the marking wheel, which faces the perspective window. The other end of the transmission shaft 525 is located at the liquid outlet of the branch and is provided with a power impeller 526.

[0113] In this embodiment, the power impeller 526 is located near the liquid outlet of the inner flow channel 12 of the branch. When liquid flows at the liquid outlet, the power impeller 526 rotates, thereby driving the marking wheel to rotate, making it easier for users to observe.

[0114] The first liquid inlet end of the water outlet valve body 521 is further provided with a pressure differential liquid outlet valve core 4 for increasing the liquid outlet resistance of the inner flow channel.

[0115] The pressure differential liquid outlet valve core 4 includes a liquid outlet support frame 41 , a liquid outlet valve plate 42 provided on the liquid outlet support frame 41 , and a liquid outlet spring 44 .

[0116] The liquid outlet support frame 41 is threadedly connected to the first liquid inlet end of the water outlet valve body 521 , and a first mounting hole is provided in the center thereof for mounting the liquid outlet valve plate 42 .

[0117] The liquid outlet valve plate 42 is rod-shaped, and a second mounting hole is provided in the middle thereof for fitting the transmission shaft 525. The sealing end thereof is a conical surface for sealing the inner flow channel.

[0118] The liquid outlet support frame 41, the liquid outlet spring 44 and the liquid outlet valve plate 42 are all mounted on the middle part of the transmission shaft 525. A liquid outlet spring 44 is also provided between the liquid outlet support frame 41 and the liquid outlet valve plate 42. The liquid outlet valve plate 42 seals the inner flow channel of the pipe-in-pipe pipeline, and the power impeller 526 is located in the inner flow channel.

[0119] The liquid outlet guide channel 43 is formed on the conical surface of the liquid outlet valve plate 42 .

[0120] [Main water inlet valve with built-in pressure differential inlet valve core]

[0121] like Figure 12 As shown, this embodiment provides a total water inlet valve 7 with a built-in pressure differential liquid inlet valve core, which replaces the above-mentioned total water inlet valve 7, end pipe joint 14 and pressure differential liquid inlet valve core 3, thereby making installation more convenient.

[0122] The main water inlet valve 7 is a stop valve, which includes a stop valve body 71, a stop valve cover 72, a stop valve core 73 and a built-in pressure differential liquid inlet valve core.

[0123] The stop valve body 71 is T-shaped and has a total liquid inlet end 711 connected to the tap water pipe, a total control end 712 for installing the stop valve core 73, and a total liquid outlet end 713 connected to the pipe-in-pipe.

[0124] A cut-off inner tube portion 714 is provided between the total control end 712 and the total liquid outlet end 713 , thereby forming the inner flow channel and the outer flow channel. The total liquid inlet end 711 is connected to the liquid inlet ends of the inner and outer flow channels through the total control end 712 .

[0125] The main control end 712 is threadedly connected to the stop valve cover 72, and a sealing ring is provided between the two.

[0126] The stop valve core 73 includes a connecting rod 731 rotatably arranged on the stop valve cover 72, a handwheel 732 fixed to the outer end of the connecting rod 731, a lifting platform 733 arranged at the inner end of the connecting rod 731, and a sealing gasket 734 arranged on the bottom surface of the lifting platform 733. The sealing gasket 734 is fixed to the lifting platform 733 by screws. When the handwheel 732 and the connecting rod 731 rotate, the lifting platform 733 will rise and fall, and cause the sealing gasket 734 to seal / open the inner and outer flow channels of the total control end 712, thereby controlling the liquid inlet of the total liquid inlet end 711.

[0127] The structure of the built-in pressure differential liquid inlet valve core is basically the same as that of the above-mentioned pressure differential liquid inlet valve core, and it is installed at the liquid inlet end of the outer flow channel of the main control end 712.

[0128] In this embodiment, the pressure differential inlet valve core includes an inlet valve body 31, an inlet valve disc 33, and an inlet spring 34. The inlet valve body 31 is threadedly connected to the inner wall of the inlet end of the outer flow channel. One end of the inlet spring 34 abuts against the stepped surface of the inlet end of the inner flow channel, and the other end abuts against the inlet valve disc 33, thereby causing the inlet valve disc 33 to seal the inlet hole 32 of the inlet valve body 31.

[0129] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A passive pressure differential tube-in-tube liquid discharge system, characterized by: include: A main pipeline (1) has an inner main pipeline and an outer main pipeline, wherein the liquid inlet ends of the inner main pipeline and the outer main pipeline are connected to each other and form a pipeline liquid inlet end (11); A main water inlet valve (7), mounted on the liquid inlet end (11) of the pipeline, for use with a tap water pipe; A plurality of branches (2) are distributed on the main pipeline (1) and have inner branch flow channels and outer branch flow channels, the ends of the inner branch flow channels and the outer branch flow channels are connected to each other and form a pipeline liquid outlet end (21); the inner branch flow channels and the inner main flow channel are connected to each other and form an inner flow channel (12), and the outer branch flow channels and the outer main flow channel are connected to each other and form an outer flow channel (13); A pressure differential liquid inlet valve core (3) is provided at the liquid inlet end (11) of the pipeline and is used to increase the liquid inlet resistance at the liquid inlet end of the outer main flow channel; A plurality of pressure differential liquid outlet valve cores (4) are arranged on corresponding branches (2) and are used to increase the liquid outlet resistance at the liquid outlet end of the inner branch flow channel; as well as A plurality of water outlet devices (5) are installed at the corresponding liquid outlet ends (21) of the pipelines; When the water outlet device (5) of one or more branches (2) is opened, a pressure difference is generated between the inner flow channel (12) and the outer flow channel (13), and the pressure of the inner flow channel (12) is higher than the pressure of the outer flow channel (13), so that in the remaining branches (2), the liquid in the inner flow channel (12) can flow back to the outer flow channel (13) through the corresponding pipeline liquid outlet end (21), and finally flow out through the pipeline liquid outlet end (21) of the opened water outlet device (5).

2. The passive pressure differential tube-in-tube liquid outlet system according to claim 1, characterized in that: The pressure differential liquid inlet valve core (3) comprises a liquid inlet valve plate (33) installed at the liquid inlet end of the outer main flow channel, and the liquid inlet valve plate (33) is an annular diaphragm.

3. The passive pressure differential tube-in-tube liquid outlet system according to claim 1, characterized in that: The pressure differential liquid inlet valve core (3) comprises a liquid inlet valve body (31) installed at the liquid inlet end of the outer main flow channel, a liquid inlet valve plate (33) and a liquid inlet spring (34); a liquid inlet hole (32) is provided in the liquid inlet valve body (31), and the liquid inlet valve plate (33) is movably arranged on the liquid inlet hole (32) via the liquid inlet spring (34).

4. A passive pressure differential tube-in-tube liquid outlet system according to claim 2 or 3, characterized in that: The liquid inlet valve plate (33) is provided with a liquid inlet guide channel (35) communicating with the inside and outside.

5. The passive pressure differential tube-in-tube liquid outlet system according to claim 1, characterized in that: The pressure differential liquid outlet valve core (4) comprises a liquid outlet support frame (41) and a liquid outlet valve plate (42) arranged on the liquid outlet support frame (41); the liquid outlet valve plate (42) is arranged at the liquid outlet end of the inner branch flow channel; and at least one liquid outlet guide channel (43) is provided at the end of the liquid outlet valve plate (42).

6. The passive pressure differential tube-in-tube liquid outlet system according to claim 5, characterized in that: The pressure differential liquid outlet valve core (4) further comprises a liquid outlet spring (44), and the liquid outlet spring (44) is arranged between the liquid outlet support frame (41) and the liquid outlet valve plate (42).

7. A passive pressure differential tube-in-tube liquid outlet system according to claim 5 or 6, characterized in that: The branch (2) is provided with a three-way pipe joint (22), the three-way pipe joint (22) comprising two joint mounting portions (221) for connecting pipes in pipes, a joint inner pipe arranged between the two joint mounting portions (221), and a valve assembly portion (222), an inner flow channel being formed in the joint inner pipe, and an outer flow channel being formed on the outer side of the joint inner pipe; A partition (224) is provided in the valve assembly portion (222), and the partition (224) is used to form two partition channels (223). One end of the two partition channels (223) is provided in the valve assembly portion (222), and the other ends of the two partition channels (223) are respectively connected to the inner flow channel of the corresponding joint installation portion (221); the liquid outlet valve plate (42) is provided at one end of at least one of the partition channels.

8. The passive pressure differential tube-in-tube liquid outlet system according to claim 7, characterized in that: The partition portion (224) has an extension wall (2241) connecting the joint inner tube and the valve assembly portion (222), and an inner partition plate (2242) arranged in the extension wall (2241), and the inner partition plate (2242) is used to separate the inner flow channel.

9. The passive pressure differential tube-in-tube liquid outlet system according to claim 1, characterized in that: A water pump (6) is provided on the main line (1) or the branch line (2), the liquid inlet end of the water pump (6) is connected to the inner flow channel (12), the liquid outlet end of the water pump (6) is connected to the outer flow channel (13), and a check valve (61) is provided.

10. The passive pressure differential tube-in-tube liquid outlet system according to claim 1, characterized in that: The water outlet device (5) is configured as a visual water outlet valve (52), which includes a water outlet valve body (521). The water outlet valve body (521) has a first liquid inlet end, a first liquid outlet end, and a first control end connecting the two. A water outlet control valve core is provided in the first control end. A perspective window is provided on the side wall of the first liquid inlet end. A perspective seal (522) is provided in the perspective window. A water flow visual object (523) is provided in the perspective seal (522). When water flows through, the water flow visual object (523) will move accordingly.

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