Diaphragm type balance valve core for pipe-in-pipe and balance valve

Abstract

The utility model belongs to the technical field of domestic water, and particularly relates to a diaphragm type balance valve core for a pipe-in-pipe and a balance valve. The balance valve is provided with a balance valve element and comprises a balance valve frame, a balance valve element and a balance valve element, the valve core seat is mounted on the balance valve frame; the diaphragm component is installed on the valve element seat or in the balance valve frame, and a balance channel is arranged between the valve element seat and the diaphragm component or between the balance valve frame and the diaphragm component; the diaphragm component can deform and change the sectional area of the balance channel according to the pressure of the first channel. The medium pressure is large, the deformation amount of the diaphragm component is large, and the backflow amount of the balance channel is small, so that the backflow amount of the branch away from the circulating pump is larger than or equal to the backflow amount of the branch close to the circulating pump, the effect that the backflow amount is small and large is achieved, and the circulating efficiency and the water quality of the branch at the far end are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of domestic water technology, specifically referring to a diaphragm-type balancing valve core and balancing valve for use in pipe-in-pipe systems. Background Technology

[0002] Utility model CN212956776U discloses a pipe-in-pipe water circulation system, comprising a pipe-in-pipe pipeline and pipe connectors. The pipe-in-pipe pipeline has an inner flow channel and an outer flow channel. The pipe-in-pipe pipeline has a first inner pipe mounting end connecting to the inner flow channel and a first outer pipe mounting end connecting to the outer flow channel. A circulation pipeline is provided between the first outer pipe mounting end and the first inner pipe mounting end, including a circulation pipe and a circulation pump. The end of the pipe-in-pipe pipeline is connected to a liquid outlet device via a tail valve, the inner cavity of which connects the inner and outer flow channels. This utility model, through the action of the circulation pump, can promote the timed circulation of liquid between the inner and outer flow channels, inhibiting the growth of bacteria and other harmful substances, and ensuring the cleanliness and hygiene of the water source.

[0003] A typical circulating water system needs to circulate water at least once every six hours to maintain internal water quality and prevent stagnant water from breeding bacteria. However, in actual use, when encountering long pipe-within-a-pipe systems, the branches closer to the circulation pump have higher pressure and flow rates, resulting in better circulation. Conversely, the branches farther from the circulation pump have relatively lower pressure and flow rates, leading to poor circulation and even situations where the furthest branch ends not participate in circulation at all. Utility Model Content

[0004] The purpose of this invention is to provide a simple diaphragm-type balance valve core and balance valve for pipe-in-pipe applications that can improve the overall circulation effect.

[0005] The purpose of this utility model is achieved as follows:

[0006] A diaphragm-type balancing valve core for use in a pipe-in-pipe system, for installation in a pipe-in-pipe system having a first channel and a second channel, includes: a balancing valve frame, installed at the end of the pipe-in-pipe system and used to separate the first channel and the second channel; a valve core seat, installed on the balancing valve frame; and a diaphragm component, installed on the valve core seat or inside the balancing valve frame, wherein a balancing channel is provided between the valve core seat and the diaphragm component or between the balancing valve frame and the diaphragm component, one end of the balancing channel connecting to the first channel and the other end connecting to the second channel; the diaphragm component can deform itself according to the pressure of the first channel and change the cross-sectional area of ​​the balancing channel.

[0007] The present invention further includes the following: a first contact surface is formed on the balance valve holder or valve core seat; a second contact surface adapted to the first contact surface is provided on the diaphragm component; at least one balance groove is provided on the first contact surface and / or the second contact surface, one end of the balance groove is connected to the first channel and the other end is connected to the second channel; when the second contact surface abuts against the first contact surface, all the balance grooves form a balance channel.

[0008] The present invention further includes a valve core seat installed inside a balance valve frame, forming a diaphragm mounting cavity for mounting diaphragm components between the two. The balance valve frame has at least one first through hole communicating with the diaphragm mounting cavity, and the valve core seat has at least one second through hole communicating with the diaphragm mounting cavity. One end of the balance groove communicates with the first through hole and the other end communicates with the second through hole.

[0009] The present invention further includes a first contact surface that is a plane or a cone; a first through hole or a second through hole that is located at the center of the first contact surface; and a balancing groove that is circumferentially distributed on the first contact surface or the second contact surface with the first through hole or the second through hole as the center.

[0010] The present invention further includes a diaphragm component comprising a circular diaphragm body and a plurality of diaphragm support portions disposed on the outer periphery of the diaphragm body, wherein a support portion gap is formed between two adjacent diaphragm support portions, and the balancing groove can be connected to a first channel or a second channel through the support portion gap.

[0011] The present invention further includes a sealing protrusion in the diaphragm component for sealing the first or second through hole for liquid inlet.

[0012] The present invention further comprises: a balance valve frame having a valve core mounting hole connecting a first channel and a second channel; a valve core seat being movably disposed within the valve core mounting hole, and having at least one guide groove on its side wall; a valve core seat sealing ring for sealing the valve core mounting hole being provided at one end of the valve core seat, and a diaphragm component being installed at the other end, the outer periphery of the diaphragm component abutting against the outer periphery of the first contact surface; and balance grooves being circumferentially distributed on the first contact surface or the second contact surface with the diaphragm component as the center.

[0013] The present invention further comprises: a valve core seat having an annular sidewall, one end of which is a closed end and the other end is a mounting end, and which is disposed on a balance valve frame; the outer surface of the annular sidewall forming a first contact surface; a diaphragm component being annular and fitted onto the annular sidewall, the inner sidewall of which forms a second contact surface; and a balance channel including at least one balance groove formed on the first contact surface or the second contact surface and a through hole formed at the end of the balance groove and communicating with the inner cavity of the valve core seat.

[0014] The present invention further includes a valve core mounting hole in which the balance valve frame has a valve core mounting hole connecting the first channel and the second channel, the valve core mounting hole being located inside the valve core seat; a check valve is installed on the valve core mounting hole.

[0015] A pipe-in-pipe balancing valve includes a valve body and a balancing valve core disposed within the valve body. The balancing valve core is the aforementioned pipe-in-pipe balancing valve core, which is integrally or separately disposed on the valve body via a balancing valve bracket.

[0016] A pipe-in-pipe circulation system includes a pipe-in-pipe pipeline and a functional module. The pipe-in-pipe pipeline has a main pipeline and several branches arranged on the main pipeline. Both have a first channel and a second channel, and a balancing valve core or a balancing valve is provided at the end of each branch. The functional module includes a circulation pump and functional components for processing the medium. The outlet end of the circulation pump is connected to the first channel of the main pipeline, and the inlet end of the circulation pump is connected to the second channel of the main pipeline, thereby forming a circulation loop. The balancing valve core is the aforementioned pipe-in-pipe balancing valve core, and the balancing valve is a pipe-in-pipe balancing valve. When the first channel is pressurized for circulation, the return flow rate of the branch far from the circulation pump can be greater than or equal to the return flow rate of the branch close to the circulation pump.

[0017] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0018] 1. The balancing valve core of this utility model includes a balancing valve frame, a valve core seat, and a diaphragm component. A balancing channel is provided between the valve core seat and the diaphragm component, or between the balancing valve frame and the diaphragm component. The diaphragm component can deform itself and change the cross-sectional area of ​​the balancing channel according to the pressure of the first channel. When the medium pressure in the first channel is higher, the actual backflow cross-sectional area of ​​the balancing channel is smaller, thereby realizing the regulation of the backflow between the first channel and the second channel.

[0019] 2. In some embodiments of this utility model, a balancing groove is provided on the diaphragm component. Its own deformation has a significant impact on the cross-section of the balancing groove, resulting in high control precision. At the same time, the circumferential distribution of multiple balancing grooves can increase the return flow of the balancing channel, ensure the strength of the diaphragm component, facilitate better resetting, and increase the service life of the diaphragm component.

[0020] 3. This utility model is equipped with a sealing protrusion, a check valve and other check structures, so that the balance valve has the advantages of both regulating backflow and preventing medium backflow.

[0021] 4. Each branch end of this utility model is equipped with a balancing valve core. When the pipe-in-pipe circulation system is circulating internally, the balancing valve core of the branch closer to the circulation pump experiences greater deformation of the diaphragm component due to higher medium pressure, resulting in a smaller return flow rate in the balancing channel. Conversely, the balancing valve core of the branch farther from the circulation pump experiences lower pressure, leading to less deformation of the diaphragm component and a larger return flow rate in the balancing channel. Therefore, the return flow rate of the branch farther from the circulation pump is greater than or equal to that of the branch closer to the circulation pump, achieving a smaller return flow rate near the pump and a larger return flow rate far away. This ensures the circulation efficiency and water quality of the distant branches, thereby improving the overall circulation efficiency and water quality of the pipe-in-pipe circulation system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the pipe-in-pipe circulation system of this utility model.

[0023] Figure 2 This is a schematic diagram of the installation of the first type of balance valve core of this utility model.

[0024] Figure 3 This is a cross-sectional view of the first type of balance valve core of this utility model.

[0025] Figure 4 yes Figure 3 Sectional view at point AA.

[0026] Figure 5 This is a schematic diagram of the state of the balance valve core when the branch flows back at the end of the branch.

[0027] Figure 6 This is a schematic diagram of the installation of the second type of balance valve core of this utility model.

[0028] Figure 7 This is a cross-sectional view of the second type of balance valve core of this utility model.

[0029] Figure 8 This is a schematic diagram of the installation of the third type of balance valve core of this utility model.

[0030] Figure 9 This is a cross-sectional view of the third type of balance valve core of this utility model.

[0031] Figure 10 This is an installation diagram of the balance valve and the fourth type of balance valve core of this utility model.

[0032] Figure 11 yes Figure 10 A magnified view of a section at point C.

[0033] Figure 12 This is an installation diagram of the fifth type of balance valve core of this utility model.

[0034] Figure 13This is a cross-sectional view of the fifth type of balance valve core of this utility model.

[0035] Figure 14 yes Figure 13 Sectional view at point CC.

[0036] The meaning of the labels in the diagram:

[0037] Pipe-in-pipe system 1, Functional module 2, Balancing valve core 3, Balancing valve 4.

[0038] Main pipe 11, branch pipe 12, pipe-in-pipe 13, pipe joint 14, inner pipe 141, outer pipe 142

[0039] Circulation pump 21, functional component 22, inlet check valve 23, backflow check valve 24, inlet pipe 25, return pipe 26.

[0040] Balance valve bracket 31, valve core mounting hole 311, inner mounting part 312, partition part 3121, outer mounting part 313, connecting part 314, first through hole 315; outer annular limiting part 316.

[0041] Valve core seat 32, second through hole 321, guide groove 322, annular sidewall 323, closed end 324, mounting end 325, valve core seat sealing ring 326.

[0042] Diaphragm component 33, diaphragm body 331, diaphragm support 332, support gap 333, sealing protrusion 334

[0043] Balance channel 34, first contact surface 341, second contact surface 342, balance groove 343, through hole 344

[0044] Valve core sealing ring 35

[0045] Check valve 36, check valve core 361, check seal ring 362, check return component 363

[0046] Valve body 41, adapter 42, inner annular limiting part 421. Detailed Implementation

[0047] The present invention will be further described below with reference to specific embodiments:

[0048] Example 1:

[0049] like Figure 1 As shown, a pipe-in-pipe circulation system, particularly a direct drinking water circulation system, is mainly used in scenarios such as residential buildings, villas, and hotels that require direct drinking water. It includes a pipe-in-pipe pipeline 1 and a functional module 2.

[0050] The pipe-in-pipe system 1 includes a main pipe 11 and several branch pipes 12 disposed on the main pipe 11. Both are composed of a pipe-in-pipe 13 having a first channel and a second channel, and a pipe connector 14. Generally, the pipe-in-pipe 13 and the pipe connector 14 each include an inner pipe 141, an outer pipe 142, and a connecting part connecting the two. The inner pipe 141 forms an inner flow channel, and an outer flow channel is formed between the inner pipe 141 and the outer pipe 142. The pipe connector 14 installed at the end of the branch pipe 12 generally includes at least one pipe-in-pipe connecting end for connecting the pipe-in-pipe 13 and at least one pipe-in-pipe outlet end for connecting and installing external equipment such as ordinary angle valves. The inner cavity of the pipe-in-pipe outlet end can communicate with the inner flow channel and the outer flow channel. The pipe connector 14 shown in this embodiment has one pipe-in-pipe connecting end and one pipe-in-pipe outlet end.

[0051] In this embodiment, functional module 2 includes a circulation pump 21, a functional component 22 for processing the medium, an inlet check valve 23, an inlet pipe 25, a return check valve 24, and a return pipe 26. The inlet pipe 25 is connected to the circulation pump 21 and the functional component 22 in sequence through the inlet check valve 23. The functional component 22 is preferably a water filter or a sterilizer. The outlet of the circulation pump 21 is connected to the first channel of the main pipeline 11 through the functional component 22. The inlet of the circulation pump 21 is also connected to the second channel of the main pipeline 11 through the return check valve 24 and the return pipe 26. At this time, a circulation loop is formed between the circulation pump 21, the functional component 22, the first channel, and the second channel. When the circulation pump 21 is turned on, the drinking water inside the pipeline can continuously circulate internally through the functional component 22, ensuring the water quality of the drinking water. The order of the circulation pump 21 and the functional component 22 can be set according to actual needs.

[0052] In this embodiment, since the flow circulates from the outer channel to the inner channel, the outer channel is the first channel and the inner channel is the second channel. In other embodiments, the first channel may also be the inner channel, in which case the second channel is the outer channel, meaning the flow circulates from the inner channel to the outer channel.

[0053] like Figure 2 As shown, in this embodiment, each branch 12 is provided with a balance valve core 3 or a balance valve 4 containing the balance valve core 3 at its end. Specifically, the branch 12 is provided with a pipe joint 14, a balance valve core 3 and a control valve, or the branch 12 is provided with a pipe joint 14 and a balance valve 4 containing the balance valve core 3.

[0054] This embodiment includes a balancing valve 4 containing a balancing valve core 3. The balancing valve 4 is an angle valve with a valve body 41. The valve body 41 has an angle valve mounting end, an angle valve control end for mounting the control valve core, and an angle valve output end for connecting to water outlet devices such as faucets. The balancing valve core 3 is disposed on the inner side of the angle valve mounting end. The balancing valve core is integrally or separately disposed on the valve body 41 via a balancing valve bracket 31. The outer side of the angle valve mounting end is installed in the threaded hole of the pipe connector 14.

[0055] In this embodiment, the balance valve core 3 is mainly used to control the return flow from the first channel (outer channel) to the second channel (inner channel).

[0056] like Figure 3 , 4 As shown, the balance valve core 31 includes a balance valve bracket 31, a valve core seat 32, a diaphragm component 33, and a valve core sealing ring 35.

[0057] The balance valve holder 31 has an integrally formed inner mounting portion 312, an outer mounting portion 313, and a plurality of connecting portions 314 for connecting the inner mounting portion 312 and the outer mounting portion 313. The inner mounting portion 312 has a tubular structure, with a partition portion 3121 protruding from the inner wall of its upper end. The partition portion 3121 has at least one first through hole 315. An internal thread portion for mounting the valve core seat 32 is provided inside the partition portion 3121. A valve core sealing ring 35 is installed at its lower end.

[0058] An installation step is provided at the end of the inner tube 141 of the pipe connector 14 (i.e., the liquid outlet end of the pipe-in-pipe). The inner wall of the inner mounting part 312 is mounted on the installation step. A valve core sealing ring 35 is provided between the installation step and the inner mounting part 312, thereby achieving sealing and positioning of the balance valve frame 31 and the inner tube 141. The outer side of the outer mounting part 313 is provided with a connection structure such as an external thread, which can be directly or indirectly installed on the outer tube of the pipe connector 14 (i.e., the liquid outlet end of the pipe-in-pipe). In this embodiment, the balance valve core 31 is indirectly installed on the outer tube of the pipe connector 14 through the valve body 41 of the balance valve 4.

[0059] The outer mounting part 31 is integrally fixedly connected to the inner mounting part 312 via the connecting part 314. The connecting part 314 is used to connect the inner mounting part 312 and the outer mounting part 313 on the one hand, and can also guide the outer flow channel on the other hand. At this time, with the first through hole 315 as the dividing point, the balance valve frame 31 can separate the first channel (outer flow channel) and the second channel (inner flow channel).

[0060] The diaphragm component 33 has a circular diaphragm body 331, a plurality of diaphragm support portions 332 disposed on the outer periphery of the diaphragm body 331, and a sealing protrusion 334 disposed in the middle of the diaphragm body 331. The three components are integrally formed, and a support gap 333 is formed between two adjacent diaphragm support portions 332. The sealing protrusion 334 is used to seal the first through hole 315 or the second through hole 321 for liquid inlet to prevent backflow. In this embodiment, the sealing protrusion 334 is used to seal the first through hole 315.

[0061] The outer side of the valve core seat 32 is provided with an external thread portion that matches the internal thread portion of the inner mounting portion 312 and a valve core seat sealing ring 326. When the valve core seat 32 is threadedly mounted on the balance valve frame 31, the valve core seat sealing ring 326 is provided in the inner mounting portion 312 of the valve core seat 32 and the balance valve frame 31.

[0062] In this embodiment, a diaphragm mounting cavity for mounting the diaphragm component 33 is formed between the valve core seat 32 and the partition portion 3121 of the inner mounting portion 312. The valve core seat 32 is provided with at least one second through hole 321 communicating with the diaphragm mounting cavity. The first through hole 315, the diaphragm mounting cavity and the second through hole 321 are interconnected.

[0063] A balancing channel 34 is provided between the valve core seat 32 and the diaphragm component 33, or between the balancing valve frame 31 and the diaphragm component 33. One end of the balancing channel 34 is connected to a first channel, and the other end is connected to a second channel. The diaphragm component 33 can deform itself according to the pressure in the first channel and change the cross-sectional area of ​​the balancing channel 34. Specifically, a first contact surface 341 is formed on the balancing valve frame 31 or the valve core seat 32, and a second contact surface 342 adapted to the first contact surface 341 is provided on the diaphragm component 33. At least one balancing groove 343 is provided on the first contact surface 341 and / or the second contact surface 342, one end of the balancing groove 343 is connected to the first channel, and the other end is connected to the second channel. When the second contact surface 342 abuts against the first contact surface 341, all the balancing grooves 343 form the balancing channel 34.

[0064] In this embodiment, a first contact surface 341 is formed on the valve core seat 32, and a second through hole 321 is provided at the center of the first contact surface 341.

[0065] The diaphragm component 33 is provided with a second contact surface 342, such as Figure 4As shown, four balancing grooves 343 are circumferentially distributed on the second contact surface 342. The four balancing grooves 343 are cross-shaped, and the outer end of each balancing groove 343 corresponds to a support gap 333. The inner ends of each balancing groove 343 converge and correspond to the second through hole 321. That is, the balancing grooves 343 are circumferentially distributed on the second contact surface 342 with the second through hole 321 as the center. At this time, the balancing grooves 343 can connect to the first channel (outer flow channel) through the support gap 333 and the first through hole 315. At the same time, the balancing grooves 343 can connect to the second channel (inner flow channel) through the second through hole 321.

[0066] In this embodiment, the diaphragm component 33 is provided with a balancing groove 343. Its own deformation has a significant impact on the cross-section of the balancing groove 343, resulting in high control precision. At the same time, the circumferential distribution of multiple balancing grooves 343 can increase the return flow of the balancing channel 34, ensuring the strength of the diaphragm component 33, facilitating better reset, and also increasing the service life of the diaphragm component 33.

[0067] like Figure 5 As shown, when the pressure in the first channel (outer channel) is greater than the pressure in the second channel (inner channel), the diaphragm component 33 is deformed by force and deforms toward the first contact surface 341 of the valve core seat 32. At the same time, the first through hole 315 is opened, and the medium in the first channel (outer channel) can enter the second channel (inner channel) in sequence through the first through hole 315, the support gap 333, the balance groove 343, and the second through hole 321.

[0068] The first contact surface 341 is a plane or a conical surface. The conical surface can play a certain role in guiding the flow. At the same time, when the diaphragm component 33 is under pressure, it can provide the diaphragm component 33 with a larger deformation space.

[0069] When the first contact surface 341 and the second contact surface 342 come into contact with each other, all the balancing grooves 343 form a balancing channel 34. The return flow rate of the balancing channel 34 is equivalent to the sum of the return flow rates of each balancing groove 343. The magnitude of the return flow rate depends on the magnitude of the return flow rate of each balancing groove 343, which in turn depends on the minimum cross-section of the balancing groove 343. In this embodiment, the diaphragm component 33 and the valve core seat 32 are in contact, making the balancing groove 343 equivalent to a return channel. The cross-section of the return channel is determined by both the diaphragm component 33 and the valve core seat 32. The size of the valve core seat 32 remains unchanged, but since the diaphragm component 33 deforms according to the change in medium pressure, the greater the medium pressure in the first channel (outer flow channel), the greater the deformation of the diaphragm component 33, and the closer it is to the first contact surface 341. Therefore, the minimum cross-section of the return channel formed by the balancing groove 343 is smaller, i.e., the return flow rate is smaller.

[0070] like Figure 1As shown, each branch of the pipe-in-pipe circulation system is equipped with a balancing valve core 3. When the pipe-in-pipe circulation system is in internal circulation (i.e., when the circulation pump 21 is working), the balancing valve core 3 in the branch closer to the circulation pump experiences higher pressure, resulting in greater deformation of the diaphragm component 33 and smaller return flow in the balancing channel 34. Conversely, the balancing valve core 3 in the branch farther from the circulation pump experiences lower pressure, resulting in less deformation of the diaphragm component 33 and larger return flow in the balancing channel 34. Therefore, the return flow of the branch 12 farther from the circulation pump 21 is greater than or equal to the return flow of the branch 12 closer to the circulation pump 21, achieving a smaller return flow near the branch and a larger return flow far from the branch. This ensures the circulation efficiency and water quality of the distant branch, thereby improving the overall circulation efficiency and water quality of the pipe-in-pipe circulation system.

[0071] In another embodiment, the pipe connector 14 can be directly fitted with the balance valve core 3; this solution can also be understood as a...

[0072] The balance valve 4 with balance valve core 3, the pipe joint 14 is equivalent to the valve body 41, and the angle valve and other control valves are directly installed on the pipe joint 14 to achieve the same effect.

[0073] In another embodiment, the balance valve core 3 can also be used to control the return flow from the second channel (inner channel) to the first channel (outer channel).

[0074] In another embodiment, the pipe-in-pipe circulation system can also be used in a hot water outlet system, in which case the functional component 22 is a water heater.

[0075] Example 2:

[0076] This embodiment is basically the same as Embodiment 1, except that the balance valve core 3 is different.

[0077] like Figure 6 , 7 As shown, the balance valve frame 31 has an integrally formed inner mounting part 312, an outer mounting part 313, and several connecting parts 314 for connecting the inner mounting part 312 and the outer mounting part 313. The inner mounting part 312 has a tubular structure, with a partition part 3121 protruding from its inner wall. The partition part 3121 has at least one first through hole 315. Its upper end is provided with an internal thread for mounting the valve core seat 32. Its lower end is provided with a valve core sealing ring 35 adapted to the inner tube. The outer mounting part 313 has an external thread and other connection structure on its outer side, which can be directly installed on the outer tube of the pipe joint 14 or the valve body 41 of the balance valve 4.

[0078] The outer side of the valve core seat 32 is provided with an external thread that is adapted to the internal thread of the inner mounting part 312. After installation, a diaphragm mounting cavity for mounting the diaphragm component 33 is formed between the valve core seat 32 and the partition 3121 of the inner mounting part 312. The valve core seat 32 is provided with at least one second through hole 321 that communicates with the diaphragm mounting cavity. The second through hole 321, the diaphragm mounting cavity and the first through hole 315 are interconnected.

[0079] The structure of the diaphragm component 33 is basically the same as that in Embodiment 1. It has a circular diaphragm body 331, a plurality of diaphragm support portions 332 disposed on the outer periphery of the diaphragm body 331, and a sealing protrusion 334 disposed in the middle of the diaphragm body 331. The three are integrally formed. The sealing protrusion 334 is used to seal the second through hole 321. A support gap 333 is formed between two adjacent diaphragm support portions 332. When the diaphragm component 33 moves in the diaphragm mounting cavity, the diaphragm support portion 332 can also reduce the contact area with the balance valve frame 31, thereby reducing friction.

[0080] In this embodiment, a second contact surface 342 is provided on the diaphragm component 33, and a first contact surface 341 is formed on the partition portion 3121. A second through hole 321 is provided at the center of the first contact surface 341. Four balancing grooves 343 are circumferentially distributed on the first contact surface 341. The four balancing grooves 343 are cross-shaped. The outer end of each balancing groove 343 corresponds to a support gap 333. The inner ends of each balancing groove 343 converge and correspond to the first through hole 315. It is equivalent to the balancing grooves 343 being circumferentially distributed on the first contact surface 341 with the first through hole 315 as the center.

[0081] When the pressure in the first channel (outer channel) is greater than the pressure in the second channel (inner channel), the diaphragm component 33 is deformed by force and deforms toward the first contact surface 341 of the balance valve frame 31. At the same time, the second through hole 321 is opened, and the medium in the first channel (outer channel) can enter the second channel (inner channel) in sequence through the second through hole 321, the support gap 333, the balance groove 343, and the first through hole 315.

[0082] When the diaphragm component 33 is pressed tightly against the contact end of the balance groove 343, since there is no support point between the two contact ends of the balance groove 343, the diaphragm component 33 can continue to deform under pressure, thus affecting the size of the actual recirculation cross section of the balance groove 343.

[0083] In order to ensure that the deformation of the diaphragm component 33 has a significant impact on the cross-sectional shape of the balancing groove 343, there must be a certain gap between the two contact ends of the balancing groove 343. The larger the gap, the greater the impact of the deformation of the diaphragm component 33 on the cross-sectional shape of the balancing groove 343.

[0084] Example 3:

[0085] This embodiment is basically the same as Embodiment 1, except that the balance valve core 3 is different.

[0086] like Figure 8 , 9 As shown, the balance valve holder 31 has an integrally formed inner mounting portion 312, an outer mounting portion 313, and a plurality of connecting portions 314 for connecting the inner mounting portion 312 and the outer mounting portion 313. The inner mounting portion 312 has a tubular structure, and its upper inner wall protrudes to form a partition portion 3121. The partition portion 3121 has a valve core mounting hole 311 that connects the first channel and the second channel.

[0087] The valve core seat 32 is movably disposed within the valve core mounting hole 311, and its side wall is provided with at least one guide groove 322. In this embodiment, four guide grooves 322 are provided circumferentially, and the axial length of the guide grooves 322 is greater than the inner wall length of the valve core mounting hole 311. One end of the valve core seat 32 is provided with a valve core seat sealing ring 326 for sealing the valve core mounting hole 311. The outer diameter of the valve core sealing ring 35 is greater than the inner diameter of the valve core mounting hole 311. The other end of the valve core seat 32 is fixed with a diaphragm component 33. The outer periphery of the diaphragm component 33 abuts against the outer periphery of the first contact surface 341. The diaphragm component 33 has a reset function. When not subjected to external medium pressure, the diaphragm component 33 drives the valve core seat 32 to move and causes the valve core seat sealing ring 326 to seal the valve core mounting hole 311.

[0088] In this embodiment, a second contact surface 342 is provided on the diaphragm component 33, and a first contact surface 341 is formed on the partition portion 3121. The first contact surface 341 is a conical surface, and four balancing grooves 343 are circumferentially distributed on the first contact surface 341. The four balancing grooves 343 are cross-shaped. The outer end of each balancing groove 343 is directly connected to the first channel (outer flow channel), and the inner end of each balancing groove 343 converges and corresponds to the valve core mounting hole 311. It is equivalent to the balancing grooves 343 being circumferentially distributed on the first contact surface 341 with the valve core mounting hole 311 (equivalent to the first through hole) as the center.

[0089] When the pressure in the first channel (outer channel) is greater than the pressure in the second channel (inner channel), the diaphragm component 33 is deformed by force and deforms toward the first contact surface 341 of the balance valve frame 31. At this time, the valve core seat sealing ring 326 opens the valve core mounting hole 311, so that the medium in the first channel (outer channel) can enter the second channel (inner channel) in sequence through the balance groove 343, the guide groove 322, and the valve core mounting hole 311.

[0090] When the diaphragm component 33 is pressed tightly against the contact end of the balance groove 343, since there is no support point between the two contact ends of the balance groove 343, the diaphragm component 33 can continue to deform under pressure, thus affecting the size of the actual recirculation cross section of the balance groove 343.

[0091] Example 4:

[0092] This embodiment is basically the same as embodiment three, except that the difference lies in the structure of the balance valve core 3 and the balance valve 4.

[0093] like Figure 10 , 11 As shown, the balance valve holder 31 has an integrally formed inner mounting portion 312, an outer mounting portion 313, and a plurality of connecting portions 314 for connecting the inner mounting portion 312 and the outer mounting portion 313. The inner mounting portion 312 has a tubular structure, and its lower end inner wall protrudes to form a partition portion 3121. The partition portion 3121 has a valve core mounting hole 311 that connects the first channel and the second channel.

[0094] The valve core seat 32 is movably disposed within the valve core mounting hole 311, and its side wall is provided with at least one guide groove 322. In this embodiment, four guide grooves 322 are provided circumferentially, and the axial length of the guide grooves 322 is greater than the inner wall length of the valve core mounting hole 311. One end of the valve core seat 32 is provided with a valve core seat sealing ring 326 for sealing the valve core mounting hole 311, and the outer diameter of the valve core sealing ring 35 is greater than the inner diameter of the valve core mounting hole 311. The other end of the valve core seat 32 is provided with a diaphragm component 33, the outer periphery of the diaphragm component 33 abuts against the outer periphery of the first contact surface 341, and the diaphragm component 33 has a reset function. When not subjected to external medium pressure, the diaphragm component 33 drives the valve core seat 32 to move and causes the valve core seat sealing ring 326 to seal the valve core mounting hole 311.

[0095] In this embodiment, a first contact surface 341 is formed on the partition 3121, and the first contact surface 341 is a conical surface; a second contact surface 342 is provided on the diaphragm component 33, and four balancing grooves 343 are circumferentially distributed on the second contact surface 342. The four balancing grooves 343 are cross-shaped, and the outer end of each balancing groove 343 is directly connected to the first channel (outer flow channel). The inner ends of each balancing groove 343 converge and correspond to the valve core mounting hole 311. It is equivalent to the balancing grooves 343 being circumferentially distributed on the first contact surface 341 with the valve core mounting hole 311 (equivalent to the first through hole) as the center.

[0096] When the pressure in the first channel (outer channel) is greater than the pressure in the second channel (inner channel), the diaphragm component 33 is deformed by force and deforms toward the first contact surface 341 of the balance valve frame 31. At this time, the valve core seat sealing ring 326 opens the valve core mounting hole 311, so that the medium in the first channel (outer channel) can enter the second channel (inner channel) in sequence through the balance groove 343, the guide groove 322, and the valve core mounting hole 311.

[0097] like Figure 10As shown, in this embodiment, the balance valve core 3 is threadedly connected to the valve body 41 of the balance valve 4 via the balance valve bracket 31. The valve body 41 is mounted on the pipe connector 14 via an adapter 42. One end of the pipe connector 14 has a threaded connection end and is fixed to the pipe connector 14 by a first sealing ring; the other end has a valve mounting end. At least one second sealing ring is installed on the inner wall of the valve mounting end. The valve body 41 is inserted into the valve mounting end, allowing the valve body 41 to rotate 360° during use. An inner annular limiting part 421 is provided on the inner wall between the threaded connection end and the valve mounting end. A corresponding outer annular limiting part 316 is provided on the balance valve bracket 31. The balance valve bracket 31 passes through the inner annular limiting part 421 and is threadedly connected to the valve body 41. At this time, the outer annular limiting part 316 abuts against one end of the inner annular limiting part 421, thereby achieving axial fixation of the adapter 42 and the valve body 41.

[0098] Example 5:

[0099] This embodiment is basically the same as Embodiment 1, except that the balance valve core 3 is different.

[0100] like Figure 12 , 13 As shown in Figure 14, the balance valve holder 31 has an integrally formed inner mounting portion 312, an outer mounting portion 313, and several connecting portions 314 for connecting the inner mounting portion 312 and the outer mounting portion 313. The inner mounting portion 312 has a tubular structure, with a partition portion 3121 protruding from its upper inner wall. The partition portion 3121 has a valve core mounting hole 311 that connects the first channel and the second channel. An externally threaded protrusion for mounting the valve core seat 32 extends from the outer side of the partition portion 3121.

[0101] The valve core seat 32 has an annular sidewall 323. One end of the annular sidewall 323 is a closed end 324 and the other end is a mounting end 325. The mounting end 325 has an internal thread structure and is set on the balance valve frame 31 through an external thread protrusion. The valve core mounting hole 311 is located inside the valve core seat 32.

[0102] The diaphragm component 33 is annular, and its length is the same as that of the annular sidewall 323, and it is fitted onto the annular sidewall 323.

[0103] The balancing channel 34 includes at least one balancing groove 343 formed on the first contact surface 341 or the second contact surface 342, and a through hole 344 formed at the end of the balancing groove 343 and communicating with the inner cavity of the valve core seat 32.

[0104] like Figure 14As shown, in this embodiment, the inner sidewall of the diaphragm component 33 forms a second contact surface 342, and the outer surface of the annular sidewall 323 forms a first contact surface 341. Three balancing grooves 343 are provided along the axial direction on the first contact surface 341. The outer end of the balancing groove 343 is directly connected to the first channel (outer flow channel), and the through hole 344 through the inner end of the balancing groove 343 is connected to the inner cavity of the valve core seat 32. The inner cavity of the valve core seat 32 is connected to the second channel (inner flow channel) through the valve core mounting hole 311.

[0105] When the outer wall of the diaphragm component 33 receives medium pressure, the part in contact with the balance groove 343 will deform towards the balance groove 343, thereby changing the actual return cross section of the balance groove 343. The greater the medium pressure, the smaller the actual return cross section of the balance groove 343.

[0106] Preferably, a check valve 36 is installed on the valve core mounting hole 311. The check valve 36 includes a check valve core 361, a check sealing ring 362, and a check return member 363. The check sealing ring 362 is installed at one end of the check valve core 361, and a return member mounting part is provided at the other end of the check valve core 361. The check return member 363 is fitted on the check valve core 361, with one end abutting against the return member mounting part and the other end abutting against the balance valve bracket 31.

[0107] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A diaphragm-type balancing valve core for use in a pipe-in-pipe system (1) having a first channel and a second channel, characterized in that, include: A balance valve holder (31) is installed at the end of the pipe-in-pipe pipeline (1) and is used to separate the first channel and the second channel; Valve core seat (32), mounted on the balance valve frame (31); and The diaphragm component (33) is mounted on the valve core seat (32) or inside the balance valve frame (31). A balance channel (34) is provided between the valve core seat (32) and the diaphragm component (33) or between the balance valve frame (31) and the diaphragm component (33). One end of the balance channel (34) is connected to the first channel and the other end is connected to the second channel. The diaphragm component (33) can deform itself and change the cross-sectional area of ​​the balance channel (34) according to the pressure of the first channel.

2. The diaphragm-type balance valve core for pipe-in-pipe use according to claim 1, characterized in that: in, The balance valve holder (31) or valve core seat (32) has a first contact surface (341) formed on it. The diaphragm component (33) is provided with a second contact surface (342) that is adapted to the first contact surface (341). At least one balancing groove (343) is provided on the first contact surface (341) and / or the second contact surface (342), one end of the balancing groove (343) is connected to the first channel and the other end is connected to the second channel; When the second contact surface (342) abuts against the first contact surface (341), all of the balance grooves (343) form the balance channel (34).

3. A diaphragm-type balance valve core for pipe-to-pipe applications according to claim 2, characterized in that: in, The valve core seat (32) is installed inside the balance valve frame (31), and a diaphragm mounting cavity for mounting the diaphragm component (33) is formed between the two. The balance valve frame (31) has at least one first through hole (315) that connects to the diaphragm mounting cavity. The valve core seat (32) has at least one second through hole (321) that communicates with the diaphragm mounting cavity. One end of the balancing groove (343) is connected to the first through hole (315), and the other end is connected to the second through hole (321).

4. A diaphragm-type balance valve core for pipe-in-pipe use according to claim 3, characterized in that: The first contact surface (341) is a plane or a conical surface; The first through hole (315) or the second through hole (321) is located at the center of the first contact surface (341). The balancing groove (343) is circumferentially distributed on the first contact surface (341) or the second contact surface (342) with the first through hole (315) or the second through hole (321) as the center.

5. A diaphragm-type balance valve core for pipe-to-pipe applications according to claim 3 or 4, characterized in that: in, The diaphragm component (33) includes a circular diaphragm body (331) and a plurality of diaphragm support portions (332) disposed on the outer periphery of the diaphragm body (331). A support portion gap (333) is formed between two adjacent diaphragm support portions (332), and the balance groove (343) can connect to the first channel or the second channel through the support portion gap (333).

6. A diaphragm-type balance valve core for pipe-in-pipe use according to claim 5, characterized in that: in, The diaphragm component (33) further includes a sealing protrusion (334) for sealing the first through hole (315) or the second through hole (321) for liquid inlet.

7. A diaphragm-type balance valve core for pipe-in-pipe use according to claim 2, characterized in that: in, The balance valve holder (31) has a valve core mounting hole (311) that connects the first channel and the second channel. The valve core seat (32) is movably disposed in the valve core mounting hole (311), and at least one guide groove (322) is provided on its side wall. One end of the valve core seat (32) is provided with a valve core seat sealing ring (326) for sealing the valve core mounting hole (311), and the other end is provided with the diaphragm component (33), the outer periphery of the diaphragm component (33) abuts against the outer periphery of the first contact surface (341). The balancing grooves (343) are distributed circumferentially on the first contact surface (341) or the second contact surface (342) with the diaphragm component (33) as the center.

8. A diaphragm-type balance valve core for pipe-to-pipe applications according to claim 2, characterized in that: in, The valve core seat (32) has an annular sidewall (323), one end of which is a closed end (324) and the other end is a mounting end (325), and is disposed on the balance valve frame (31). The outer surface of the annular sidewall (323) forms the first contact surface (341). The diaphragm component (33) is annular and is fitted onto the annular sidewall (323), and the inner sidewall of the diaphragm component (33) forms the second contact surface (342). The balancing channel (34) includes at least one balancing groove (343) opened on the first contact surface (341) or the second contact surface (342) and a through hole (344) opened at the end of the balancing groove (343) and communicating with the inner cavity of the valve core seat (32).

9. A diaphragm-type balance valve core for pipe-to-pipe applications according to claim 8, characterized in that: in, The balance valve holder (31) has a valve core mounting hole (311) connecting the first channel and the second channel. The valve core mounting hole (311) is located inside the valve core seat (32). A check valve (36) is installed on the valve core mounting hole (311).

10. A balancing valve for use in a pipe-in-pipe system, characterized in that: The valve includes a valve body and a balancing valve core (3) disposed within the valve body (41), wherein the balancing valve core (3) is a diaphragm-type balancing valve core for pipe-to-pipe use as described in any one of claims 1-9. The balance valve core is integrally or separately mounted on the valve body (41) via the balance valve frame (31).

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