Double-valve dynamic circulating valve

Abstract

The double-valve dynamic circulating valve comprises a shell, a main pipeline and a branch pipeline are arranged in the shell, and the two ends of the branch pipeline communicate with the main pipeline correspondingly; a valve element is arranged in the main pipeline and comprises an elastic membrane and a connecting piece, and the elastic membrane is located between the two ends of the branch pipeline. The elastic membrane is of a double-valve structure and comprises a middle installation area and two valves symmetrically located on the two sides of the installation area, the installation area is connected with the inner wall of the main pipeline through a connecting piece, and in the low water pressure state, an annular fluid gap allowing fluid in the main pipeline to flow through is formed between the two valves and the connecting piece. And in a high water pressure state, the two valves are bent and deformed in the direction away from the main pipeline by taking the mounting area as the center, so that the annular fluid gap is enlarged, and the flow of the main pipeline is increased. The flow can be adjusted more accurately according to the water pressure change, and it is ensured that a fluid system can operate stably and efficiently under various water pressure conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of domestic water valves, and more specifically, to a double-valve dynamic circulation valve. Background Art

[0002] The dynamic circulation valve is designed to solve the problem that occurs when the main water pipe supplies water to the branch water pipe, that is, the water pressure in the branch water pipe is insufficient, causing the water flow to stagnate, making it easy for bacteria to grow.

[0003] In order to effectively solve this problem, the design principle of the dynamic circulation valve is to periodically adjust the opening and closing state of the valve to produce a dynamic water pressure change in the branch water pipe. This change can promote the continuous circulation of water flow, ensure the flow of water in the branch water pipe, and avoid water stagnation and bacterial growth.

[0004] The dynamic circulation valves currently on the market often have certain limitations in design and are difficult to fully adapt to various complex water pressure conditions. Some products may leak or be damaged in high water pressure environments, and may not work properly in low water pressure environments. In addition, although some dynamic circulation valves have certain adjustment capabilities, their response speed and adjustment accuracy often cannot meet actual needs when facing rapidly changing water pressures.

[0005] Therefore, designing a dynamic circulation valve that can adapt to various water pressure conditions and has high response speed and adjustment accuracy has become a technical problem that needs to be urgently solved in the current water supply and drainage system field. Summary of the invention

[0006] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0007] In order to achieve these purposes and other advantages according to the present invention, a double-valve dynamic circulation valve is provided, which includes a housing, a main pipeline and a branch pipeline are arranged therein, and the two ends of the branch pipeline are respectively communicated with the main pipeline; a valve core is arranged in the main pipeline, which includes an elastic diaphragm and a connector, and the elastic diaphragm is located between the two ends of the branch pipeline; the elastic diaphragm is a double-valve structure, which includes a central installation area and two valves symmetrically located on both sides of the installation area, and the installation area is connected to the inner wall of the main pipeline through the connector, and under low water pressure, an annular fluid gap is formed between the two valves and the connector for the fluid in the main pipeline to flow through; when in a high water pressure state, the two valves are bent and deformed with the installation area as the center in a direction away from the main pipeline, so that the annular fluid gap is enlarged and the flow rate of the main pipeline is increased; The connecting piece includes a base, a fixing seat and a support rod. The fixing seat is clamped with the inner wall of the main pipeline. The base is clamped in the fixing seat. The support rod is clamped in the base. The installation area is sleeved on the support rod. The two valve edges and the inner wall of the fixing seat form an annular fluid gap. The support rod is axially arranged along the flow direction of the fluid in the main pipeline, and one end of the support rod close to the water inlet end is provided with a positioning column inserted into the positioning hole located in the middle of the installation area, and the end of the positioning column is provided with an elastic first undercut; the support rod is also provided with a guide column adapted to the guide holes located on both sides of the installation area; the other end of the support rod away from the water inlet end is provided with a mounting block inserted into the mounting hole of the base, and the mounting block is provided with an elastic second undercut; The fixing seat is an annular structure, which is clamped on the inner wall of the main pipeline and the outer periphery of the base.

[0008] Preferably, in the dual-valve dynamic circulation valve, the edge of each valve is provided with an elastic reinforcing rib with a trapezoidal cross-section, the elastic reinforcing rib is integrally formed with the valve and is narrower on the side close to the middle of the valve and wider on the side away from the middle of the valve.

[0009] Preferably, in the dual-valve dynamic circulation valve, the width of the elastic reinforcing ribs increases gradually from the middle of the valve to the outer edge, the gradient change ratio is 1:1.2 to 1:1.5, and the gradient change area occupies 60-80% of the valve length.

[0010] Preferably, in the double-valve dynamic circulation valve, the diaphragm is made of elastic silicone material, the thickness of the diaphragm is 0.8-1.2 mm; the height of the elastic reinforcing rib is 1.5-2 times the thickness of the diaphragm.

[0011] Preferably, the support rod of the double-valve dynamic circulation valve is a stainless steel-silicone composite structure, including an inner stainless steel core rod and an outer silicone coating layer, the thickness of the silicone coating layer is 0.3-0.6 times the diameter of the core rod, and silicon carbide particles are dispersed in the coating layer, and the particle size is 5-20μm.

[0012] Preferably, the dual-valve dynamic circulation valve further comprises a diaphragm regulating device, which comprises: A first adjusting rod, which is perpendicular to the main pipeline and penetrates the outer wall of the main pipeline and extends into the main pipeline; A second adjusting rod, one end of which is coaxially clamped with the first adjusting rod, and the other end of which penetrates the side wall of the base and is provided with a first bevel gear; A rotating rod is coaxially rotatably sleeved on the supporting rod, one end of the rotating rod is provided with a second bevel gear meshing with the first bevel gear, and the other end of the rotating rod extends toward a direction close to the diaphragm; A moving rod, which is coaxially threadedly connected to the other end of the rotating rod and is axially slidably connected to the supporting rod; The abutment block is arranged at the other end of the moving rod and is made of elastic rubber or silicone material.

[0013] Preferably, the dual-valve dynamic circulation valve further comprises a diaphragm regulating device, which comprises: A driving rod, one end of which is located outside the housing, and the other end of which is sealed and rotatable and passes through the side wall of the housing to extend into the housing; A worm gear mechanism, wherein the worm gear seal rotates and penetrates the base and is coaxially clamped with the other end of the driving rod, and the worm gear is coaxially fixedly sleeved on the supporting rod; The abutment block is made of elastic silicone material. The abutment block is connected to the output end of the worm gear mechanism through a threaded sleeve and is located on the side of the elastic diaphragm away from the water inlet end. When the driving rod rotates, the worm gear mechanism pushes the abutment block to move axially, and the elastic diaphragm is elastically compensated by the abutment block.

[0014] Preferably, the dual-valve dynamic circulation valve further comprises: Four optical fiber pressure sensors are evenly spaced along the circumferential direction and arranged on the inner wall of the fixing seat, and the optical fiber pressure sensors are arranged radially corresponding to the circumferential edge of the undeformed diaphragm; A motor, used for driving the first adjusting rod / driving rod to rotate; The controller is connected to the optical fiber pressure sensor. The controller receives the detection signal of the optical fiber pressure sensor and calculates the diaphragm pressure unevenness coefficient U, U = [max (F i )-min(F i )] / max(F i ), when U>0.15, the diaphragm adjustment device is started, the controller drives the motor to start, and the motor drives the first adjustment rod / driving rod to rotate, thereby performing compensation adjustment of the diaphragm.

[0015] Preferably, in the double-valve dynamic circulation valve, the detection end surface of the optical fiber pressure sensor is covered with a hydrophobic nano-coating with a coating thickness of ≤10 μm and a contact angle of ≥150°, and the sensor signal line is led out along the spiral groove on the outer wall of the fixing seat.

[0016] The present invention has at least the following beneficial effects: The double-valve dynamic circulation valve of the present invention has an elastic diaphragm with good elasticity and flexibility, and can directly respond quickly to changes in water pressure. When the water pressure changes, the valve of the diaphragm can bend quickly to change the size of the annular fluid gap, without the need for complex transmission of multiple components like a piston-spring structure, which greatly shortens the response time. At the same time, due to its simple structure and the absence of complex mechanical transmission components, the flow regulation error caused by factors such as component wear and jamming is reduced, so that the flow can be adjusted more accurately according to the water pressure change, ensuring that the fluid system can operate stably and efficiently under various water pressure conditions.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the double-valve dynamic circulation valve described in one of the technical solutions of the present invention under a low water pressure state; Figure 2 It is a schematic structural diagram of a double-valve dynamic circulation valve in a high water pressure state as described in another technical solution of the present invention; Figure 3 An exploded view of a valve core in another technical solution of the present invention; Figure 4 It is a schematic diagram of the structure of the valve core in another technical solution of the present invention; Figure 5 It is a schematic diagram of the internal structure of the valve core under low water pressure in another technical solution of the present invention; Figure 6 It is a schematic diagram of the internal structure of the valve core under high water pressure in another technical solution of the present invention; Figure 7 It is a schematic diagram of the structure of a diaphragm in another technical solution of the present invention; Figure 8 It is a schematic structural diagram of a support column in another technical solution of the present invention; Fig. 9 It is a schematic structural diagram of a diaphragm regulating device that is not activated in a low water pressure state in another technical solution of the present invention; Fig.10 It is a schematic structural diagram of a diaphragm regulating device that is not activated under a high water pressure state in another technical solution of the present invention; Fig.11 It is a structural schematic diagram of the diaphragm regulating device being started under low water pressure in another technical solution of the present invention; Fig.12 It is a structural schematic diagram of a diaphragm regulating device being started under a high water pressure state in another technical solution of the present invention; Fig.13 It is a structural schematic diagram of the second diaphragm regulating device being started under low water pressure in another technical solution of the present invention; Fig.14 It is a structural schematic diagram of the activation of the diaphragm regulating device 2 under high water pressure state in another technical solution of the present invention.

[0019] Explanation of the reference numerals: 1-main pipeline; 21-branch pipeline water inlet; 22-branch pipeline water outlet; 3-diaphragm; 31-positioning hole; 32-guide hole; 41-support rod; 42-positioning column; 43-guide column; 44-positioning block; 45-annular fluid gap; 51-base; 52-fixed seat; 521-speed bar; 53-sealing ring; 6-abutment block; 61-first adjusting rod; 62-second adjusting rod; 63-first bevel gear; 64-rotating rod; 65-second bevel gear; 66-moving rod; 67-oblique support; 71-worm; 72-worm wheel; 73-threaded rod; 74-sleeve. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0022] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.

[0023] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] like Figures 1 to 14As shown, the present invention provides a double-valve dynamic circulation valve, which includes a shell, in which a main pipeline 1 and a branch pipeline are arranged, and the two ends of the branch pipeline are respectively connected to the main pipeline 1; a valve core is arranged in the main pipeline 1, which includes an elastic diaphragm 3 and a connector, and the elastic diaphragm 3 is located between the two ends of the branch pipeline, that is, the elastic diaphragm 3 is located between the water inlet 21 of the branch pipeline and the water outlet 22 of the branch pipeline; the elastic diaphragm 3 is a double-valve structure, which includes a middle installation area and two valves symmetrically located on both sides of the installation area, and the installation area is connected to the inner wall of the main pipeline 1 through the connector. Under low water pressure, a valve core is formed between the two valves and the connector for the main pipeline 1 The annular fluid gap 45 through which the internal fluid flows can adapt to the normal flow demand of the fluid under low water pressure, so that the fluid in the main pipeline 1 can flow through this place smoothly and continuously; when in a high water pressure state, the two valves bend and deform with the installation area as the center in a direction away from the main pipeline 1, so that the annular fluid gap 45 increases and the flow of the main pipeline 1 increases; and when the water pressure increases and enters a high water pressure state, the two valves will bend with the installation area as the center in a direction away from the water inlet of the main pipeline 1, so that the annular fluid gap 45 can be increased in time, thereby realizing an increase in the flow of the main pipeline 1 to meet the flow demand under a high water pressure environment; The connecting piece includes a base 51, a fixing seat 52 and a support rod 41. The fixing seat 52 is clamped with the inner wall of the main pipeline 1. The base 51 is clamped in the fixing seat 52. The support rod 41 is clamped in the base 51. The installation area is sleeved on the support rod 41. The two valve edges and the inner wall of the fixing seat 52 form an annular fluid gap 45. The support rod 41 is axially arranged along the flow direction of the fluid in the main pipeline 1, and one end of the support rod 41 close to the water inlet end is provided with a positioning column 42 inserted into the positioning hole 31 located in the middle of the installation area, and the end of the positioning column 42 is provided with an elastic first undercut; the support rod 41 is also provided with a guide column 43 adapted to the guide holes 32 located on both sides of the installation area; the other end of the support rod 41 away from the water inlet end is provided with a mounting block 44 inserted into the mounting hole of the base 51, and the mounting block 44 is provided with an elastic second undercut; The fixing seat 52 is an annular structure, the outer ring of which is clamped on the inner wall of the main pipeline 1 , one end of the inner ring is clamped on the outer periphery of the base 51 , and the other end of the fixing seat 52 is sleeved with a sealing ring 53 .

[0025] like Figure 3~4 As shown, the valve core is assembled (according to Figure 3When assembling the various components from left to right in the middle, first insert the positioning column through the positioning hole, insert the guide column into the guide hole (on the one hand it serves as a guide, on the other hand it can also limit the diaphragm and place the diaphragm to rotate), and put the diaphragm on one end of the support rod. The head of the positioning column is provided with an elastic first undercut, which can be squeezed through the positioning hole. After being inserted into place, the first undercut is reset, and then the diaphragm is connected to one end of the support rod; then the other end of the support rod is clamped with the base through the adaptation of the mounting block and the mounting hole (located at one end of the base), and then the fixing seat is set on the base, and the fixing seat is clamped with the other end of the base, and the diaphragm is located in the fixing seat. Finally, the sealing ring is sleeved on the other end of the fixing seat, and the assembly of the entire valve core is completed; the assembled valve core is installed in the main pipeline by the clamping method of the existing technology. All components are made of high-quality materials with good corrosion resistance. They can still maintain good performance in harsh environments such as high water pressure and strong corrosion, ensuring the efficient operation and long-term reliability of the double-valve dynamic circulation valve.

[0026] In the above technical solution, the present invention provides a dual-valve dynamic circulation valve. Compared with the common piston-spring structure in the prior art, the present invention has significant advantages. In the existing piston-spring structure, when facing water pressure changes, the piston needs to reciprocate under the action of the spring. This process involves the coordinated operation of multiple components and the structure is relatively complex. Moreover, due to the certain friction between the piston and the inner wall of the pipe, the spring also needs a certain amount of time to complete the expansion and contraction action, resulting in a slow response speed to water pressure changes, making it difficult to achieve accurate and rapid regulation of the flow rate.

[0027] The double-valve dynamic circulation valve of the present invention has good elasticity and flexibility in itself, and can directly respond quickly to changes in water pressure. When the water pressure changes, the valve of the diaphragm can bend quickly to change the size of the annular fluid gap 45, without the need for complex transmission of multiple components like a piston-spring structure, which greatly shortens the response time. At the same time, due to its simple structure and the absence of complex mechanical transmission components, the flow regulation error caused by factors such as component wear and jamming is reduced, so that the flow can be adjusted more accurately according to the water pressure change, ensuring that the fluid system can operate stably and efficiently under various water pressure conditions.

[0028] In another technical solution, in the double-valve dynamic circulation valve, the edge of each valve is provided with an elastic reinforcing rib with a trapezoidal cross-section. The elastic reinforcing rib is integrally formed with the valve and is narrower on the side close to the middle of the valve and wider on the side away from the middle of the valve.

[0029] In another technical solution, in the double-valve dynamic circulation valve, the width of the elastic reinforcement rib increases gradually from the middle of the valve to the outer edge, the gradient change ratio is 1:1.2 to 1:1.5, and the gradient change area accounts for 60-80% of the valve length.

[0030] The elastic reinforcement rib is integrally formed with the valve to avoid weak connection points and enhance the overall structural strength. The reinforcement rib is narrower on the side close to the middle of the valve and wider on the side away from the middle. When the fluid flows, the valve is impacted by pressure in different directions, especially the edges are under great pressure. The wider outer side (away from the middle of the valve) can increase the force-bearing area, disperse the impact force of the fluid on the edge of the valve, and prevent tearing and breakage. The narrower inner side (close to the middle of the valve) will not excessively increase the weight and rigidity of the valve, but can support the middle of the valve to a certain extent, ensuring that it can flexibly deform when the water pressure changes, and realizing precise regulation of the flow rate. At the same time, the trapezoidal reinforcement ribs can evenly distribute the stress on the valve, avoid stress concentration, increase the fatigue life of the valve, and ensure the long-term and stable operation of the double-valve dynamic circulation valve.

[0031] In another technical solution, the double-valve dynamic circulation valve described is made of elastic silicone material, and the thickness of the diaphragm 3 is 0.8-1.2mm; the height of the elastic reinforcing ribs is 1.5-2 times the thickness of the diaphragm 3. The thickness of the diaphragm 3 is controlled at 0.8-1.2mm, which not only ensures sufficient flexibility to deform flexibly with the water pressure, but also has a certain strength to resist fluid impact. The height of the elastic reinforcing ribs is 1.5-2 times the thickness of the diaphragm 3. This design enables the reinforcing ribs to effectively enhance the strength of the valve edge and play a key role in dispersing the impact force of the fluid. The height is adapted to the thickness of the diaphragm 3 to ensure that the overall structure maintains long-term reliable operation while achieving flow regulation.

[0032] In another technical solution, the support rod 41 of the double-valve dynamic circulation valve is a stainless steel-silicone composite structure, including an inner stainless steel core rod and an outer silicone coating layer, the thickness of the silicone coating layer is 0.3-0.6 times the diameter of the core rod, and silicon carbide particles are dispersed in the coating layer, and the particle size is 5-20μm.

[0033] The support rod 41 adopts a stainless steel-silicone composite structure. This design significantly improves the performance of the support rod 41 and the reliability of the entire valve. The inner layer of the support rod 41 is a stainless steel core rod. Stainless steel has high strength, good rigidity and corrosion resistance, providing a solid structural support for the support rod 41. During the operation of the double-valve dynamic circulation valve, the pressure and impact force of the fluid will continuously act on the support rod 41. The stainless steel core rod can effectively withstand these external forces to ensure that the support rod 41 will not be deformed or damaged, thereby ensuring the stability of the entire valve core structure. The outer silicone coating plays multiple roles. Silicone has excellent flexibility and elasticity, which can buffer the impact of the fluid on the support rod 41 and reduce the generation of vibration and noise. At the same time, silicone also has good sealing properties, which can prevent the fluid from penetrating into the surface of the stainless steel core rod, further improving the corrosion resistance of the support rod 41. The thickness of the silicone coating is precisely controlled at 0.3-0.6 times the diameter of the core rod. This thickness range can ensure that the silicone coating plays its due role, and will not increase the overall weight and volume of the support rod 41 due to excessive thickness, affecting the normal operation of the valve. Silicon carbide particles are evenly dispersed in the silicone coating, and the particle size is 5-20μm. Silicon carbide has extremely high hardness and wear resistance. The presence of these particles significantly enhances the wear resistance of the silicone coating. During long-term use, impurities and particles in the fluid will continue to rub against the surface of the support rod 41. Silicon carbide particles can effectively resist this wear and tear, extending the service life of the silicone coating, thereby ensuring the long-term stable operation of the support rod 41. This stainless steel-silicone composite structure, combined with the design of silicon carbide particles, enables the support rod 41 to adapt to various complex working environments, providing a strong guarantee for the efficient and reliable operation of the double-valve dynamic circulation valve.

[0034] During long-term use, the elastic diaphragm 3 is prone to wear and aging due to frequent fluid scouring and pressure changes, which will reduce the elastic force of the elastic diaphragm 3 and greatly reduce the accuracy of flow control. In addition, due to the lack of an effective monitoring and adjustment mechanism, it is difficult to perceive the pressure changes in the system in real time and make corresponding adjustments. Based on the above technical defects, the present invention further provides a diaphragm adjustment device on the side of the diaphragm 3 away from the water inlet end of the main pipeline 1; the diaphragm adjustment device can preferably use the following two technical solutions: In another technical solution, the dual-valve dynamic circulation valve further includes a diaphragm adjustment device, which includes: A first adjusting rod 61, which is perpendicular to the main pipeline 1 and penetrates the outer wall of the main pipeline 1 and extends into the main pipeline 1; A second adjusting rod 62, one end of which is coaxially engaged with the first adjusting rod 61, and the other end of which penetrates through the side wall of the base 51 and is provided with a first bevel gear 63; The rotating rod 64 is coaxially rotatably sleeved on the supporting rod 41, one end of the rotating rod 64 is provided with a second bevel gear 65 meshing with the first bevel gear 63, and the other end extends toward the direction close to the diaphragm 3; The moving rod 66 is coaxially threadedly connected to the other end of the rotating rod 64 and is axially slidably connected to the supporting rod 41; The abutment block 6 is disposed at the other end of the moving rod 66 , and the abutment block 6 is made of elastic rubber or silicone material.

[0035] In the present technical solution, the diaphragm adjustment device includes a first adjustment rod, a second adjustment rod, a rotating rod, a moving rod and an abutment block. The first adjustment rod 61 is perpendicular to the main pipeline 1 and extends through its outer wall to the inside. The operator can conveniently operate the first adjustment rod 61 outside the main pipeline 1. The second adjustment rod 62 is rotatably connected to the side wall of the base 51 and is coaxially arranged with the first adjustment rod 61. The valve core is inserted into the main pipeline. After installation, the first adjustment rod 61 and the second adjustment rod 62 are automatically connected. The specific connection method can adopt the buckle with the card groove in the prior art (to achieve axial linkage rotation). The other end of the second adjustment rod 62 is coaxially fixed with the first bevel gear 63, and the rotating rod 64 is connected to the main pipeline 1. The bearing member is coaxially rotatably sleeved on the support rod 41, and the second bevel gear 65 at one end thereof meshes with the first bevel gear 63. Through gear transmission, power is transmitted to the rotating rod 64 to make it rotate around the support rod 41. The moving rod 66 is coaxially threadedly rotatably connected to the other end of the rotating rod 64, and is also axially slidably connected to the support rod 41. By utilizing the principle of thread transmission, the rotational motion of the rotating rod 64 can be converted into the axial linear motion of the moving rod 66. The abutment block 6 is disposed at the other end of the moving rod 66. The linear motion of the moving rod drives the linear motion of the abutment block, thereby adjusting the distance between the abutment block and the diaphragm. The abutment block is made of elastic rubber or silicone material, and can provide a suitable elastic supporting force when in contact with the diaphragm 3. When the diaphragm is normal, the abutment block is relatively far away from the diaphragm, and the abutment block and the diaphragm do not contact each other (they do not contact each other under low water pressure and high water pressure, such as Figures 9-10 As shown in the figure), when the diaphragm shows elastic fatigue, the diaphragm adjustment device is activated, the abutment block moves toward the diaphragm, the abutment block contacts the diaphragm, and provides elastic compensation for the diaphragm (as shown in the figure). Figures 11-12 shown); The working process of the diaphragm adjustment device is as follows: when it is detected that the diaphragm 3 has elastic loss and fatigue due to long-term use, resulting in a slow response to water pressure changes, the operator manually rotates the first adjustment rod 61, and the rotation of the first adjustment rod 61 is transmitted to the second adjustment rod 62 through a coaxial clamping method. The second adjustment rod 62 rotates accordingly and drives the first bevel gear 63 thereon to rotate. The first bevel gear 63 and the second bevel gear 65 are meshed with each other, driving the rotating rod 64 to rotate around the support rod 41. Since the moving rod 66 and the rotating rod 64 are threadedly connected, the rotation of the rotating rod 64 will cause the moving rod 66 to move linearly along the axial direction of the support rod 41 and move toward the direction close to the diaphragm 3. When the abutment block 6 contacts the diaphragm 3, the second adjustment rod 62 stops rotating. The abutment block made of elastic material provides a certain elastic support force for the diaphragm 3, assisting the diaphragm 3 to restore its elasticity, so that it can respond quickly when facing water pressure changes in the future, ensuring the continuous and efficient operation of the double-valve dynamic circulation valve.

[0036] In another technical solution, the dual-valve dynamic circulation valve further includes a diaphragm adjustment device, which includes: A driving rod, one end of which is located outside the housing, and the other end of which is sealed and rotatable and passes through the side wall of the housing to extend into the housing; The worm gear mechanism, wherein the worm 71 is sealed and rotatably penetrates the base 51 and is coaxially clamped with the other end of the driving rod, and the worm wheel 72 is coaxially fixedly sleeved on the supporting rod 41; The abutment block 6 is made of elastic silicone material. The abutment block 6 is connected to the output end of the worm gear mechanism through a threaded sleeve, and is located on the side of the elastic diaphragm 3 away from the water inlet end; when the driving rod rotates, the worm gear mechanism pushes the abutment block 6 to move axially, and elastic compensation is performed on the elastic diaphragm 3 through the abutment block 6; the threaded sleeve specifically includes a threaded rod 73 coaxially rotatably sleeved on the support rod 41 through a bearing member and a sleeve 74 threadedly rotatably connected to the threaded rod 73, the worm wheel 72 is coaxially fixedly sleeved on the threaded rod 73, the sleeve 74 is axially slidably connected to the support rod 41, and the abutment block 6 is arranged on the sleeve 74.

[0037] The present invention provides another solution of a diaphragm adjustment device. Specifically, in this solution, the diaphragm adjustment device includes a driving rod, a worm gear mechanism, a threaded sleeve and an abutment block. The gear transmission in the previous technical solution is replaced by a worm gear mechanism. The working principle is similar, and the adjustment method of the abutment block is similar, such as Figures 13 and 14 As shown, the specific adjustment process of the abutment block will not be repeated here.

[0038] In the above two schemes, the side surface of the abutment block opposite to the diaphragm is set to be concave, and the abutment block applies elastic compensation to the edges of the two valves to ensure that the two valves have sufficient elastic force, respond quickly according to the water pressure change, and timely adjust the flow of the annular fluid gap, while ensuring the normal circulation of the fluid in the main pipeline, avoiding excessive water pressure loss in the branch pipeline; in order to further improve the stability of the abutment block 6, two oblique struts 67 are symmetrically provided on the side of the abutment block 6 away from the diaphragm 3, one end of the oblique strut 67 is connected to the side of the abutment block 6, and the other end is connected to the moving rod 66 / sleeve 74.

[0039] In another technical solution, the dual-valve dynamic circulation valve further includes: Four optical fiber pressure sensors are evenly spaced along the circumferential direction and arranged on the inner wall of the fixing seat 52. The optical fiber pressure sensors are arranged radially corresponding to the circumferential edge of the undeformed diaphragm 3. A motor, which is used to drive the first adjustment rod 61 / driving rod to rotate; The controller is connected to the optical fiber pressure sensor. The controller receives the detection signal of the optical fiber pressure sensor and calculates the diaphragm pressure unevenness coefficient U, U = [max (F i )-min(F i )] / max(F i ), when U>0.15, the diaphragm adjustment device is started, the controller drives the motor to start, and the motor drives the first adjustment rod 61 / driving rod to rotate, thereby performing compensation adjustment of the diaphragm 3.

[0040] In this technical solution, U is defined as the diaphragm pressure non-uniformity coefficient, which is a dimensionless parameter used to quantitatively evaluate the uniformity of the pressure distribution on the elastic diaphragm 3 in the circumferential direction.

[0041] U is calculated by the following formula: U = [max (F i )-min(F i )] / max(F i ). Among them, F i (i=1,2,3,4) are the pressure values ​​measured by four optical fiber pressure sensors evenly spaced along the inner wall of the fixing seat 52, max (F i ) is the maximum value among the four pressure measurements, min (F i ) is the minimum value.

[0042] The closer the U value is to 0, the more uniform the pressure on each point on the circumference of the diaphragm 3 is, and the diaphragm is in good working condition; when the U value is greater than 0.15, it means that the uneven distribution of pressure on the diaphragm 3 exceeds the normal range, and there are problems such as elastic loss, fatigue or local damage. At this time, it is necessary to start the diaphragm adjustment device to compensate and adjust the diaphragm 3 to ensure the flow control accuracy and stable operation of the double-valve dynamic circulation valve.

[0043] The intelligent adjustment system in the present technical solution is mainly composed of four fiber optic pressure sensors, a motor and a controller. The four fiber optic pressure sensors are installed on the inner wall of the fixed seat 52 at uniform intervals along the circumferential direction, and are arranged radially corresponding to the circumferential edge of the undeformed diaphragm 3. The pressure information of each point on the circumference of the diaphragm 3 can be accurately obtained. The motor is used to drive the first adjustment rod 61 or the driving rod to rotate, and provide power for the diaphragm adjustment device. The controller is connected to the fiber optic pressure sensor and the motor, and is responsible for receiving the pressure signal detected by the sensor, performing data processing, and controlling the motor according to the processing results.

[0044] In specific operation, the controller will calculate a diaphragm pressure unevenness coefficient U based on the detection signals received from the four optical fiber pressure sensors. When the calculated U value is greater than 0.15, it means that the uneven distribution of pressure at each point on the circumference of the diaphragm 3 exceeds the normal range, which may be caused by elastic loss, fatigue or local damage of the diaphragm 3. At this time, the controller will immediately start the diaphragm adjustment device and drive the motor to operate. The motor drives the first adjustment rod 61 or the drive rod to rotate, and then compensates and adjusts the diaphragm 3 to restore the diaphragm 3 to a good working state.

[0045] This technical solution monitors the pressure of each point of the diaphragm 3 in real time through the optical fiber pressure sensor, uses the controller to perform intelligent analysis and judgment, and then uses the motor-driven adjustment device to perform compensatory adjustment, thereby realizing dynamic adjustment of the working state of the diaphragm 3. It can not only correct the abnormal state of the diaphragm 3 in time and improve the accuracy of flow control, but also effectively extend the service life of the diaphragm 3, reduce maintenance costs, and enhance the reliability and stability of the double-valve dynamic circulation valve, so that it can maintain efficient operation under various complex working conditions.

[0046] In another technical solution, in the described double-valve dynamic circulation valve, the detection end surface of the optical fiber pressure sensor is covered with a hydrophobic nano-coating, the coating thickness is ≤10μm, the contact angle is ≥150°, and the sensor signal line is led out along the spiral groove on the outer wall of the fixed seat 52. The provision of a hydrophobic nano-coating can prevent the fluid from adhering to the detection end, avoid the influence of liquid residue on the pressure detection accuracy, and ensure accurate and reliable measurement. At the same time, the sensor signal line is led out along the spiral groove on the outer wall of the fixed seat 52. This wiring method can protect the signal line, reduce the damage caused by fluid impact and friction, increase the service life of the sensor, and ensure the stable operation of the double-valve dynamic circulation valve.

[0047] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0048] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Double valve dynamic circulation valve, characterized in that: It comprises a shell, in which a main pipeline and a branch pipeline are arranged, and the two ends of the branch pipeline are respectively connected with the main pipeline; a valve core is arranged in the main pipeline, which comprises an elastic diaphragm and a connector, and the elastic diaphragm is located between the two ends of the branch pipeline; the elastic diaphragm is a double-valve structure, which comprises a central installation area and two valves symmetrically located on both sides of the installation area, and the installation area is connected to the inner wall of the main pipeline through the connector, and under low water pressure, an annular fluid gap is formed between the two valves and the connector for the fluid in the main pipeline to flow through; when in a high water pressure state, the two valves are bent and deformed with the installation area as the center in a direction away from the main pipeline, so that the annular fluid gap is enlarged and the flow rate of the main pipeline is increased; The connecting piece includes a base, a fixing seat and a support rod. The fixing seat is clamped with the inner wall of the main pipeline. The base is clamped in the fixing seat. The support rod is clamped in the base. The installation area is sleeved on the support rod. The two valve edges and the inner wall of the fixing seat form an annular fluid gap. The support rod is axially arranged along the flow direction of the fluid in the main pipeline, and one end of the support rod close to the water inlet end is provided with a positioning column inserted into the positioning hole located in the middle of the installation area, and the end of the positioning column is provided with an elastic first undercut; the support rod is also provided with a guide column adapted to the guide holes located on both sides of the installation area; the other end of the support rod away from the water inlet end is provided with a mounting block inserted into the mounting hole of the base, and the mounting block is provided with an elastic second undercut; The fixing seat is an annular structure, which is clamped on the inner wall of the main pipeline and the outer periphery of the base.

2. The double valve dynamic circulation valve according to claim 1, characterized in that: The edge of each valve is provided with an elastic reinforcing rib with a trapezoidal cross section. The elastic reinforcing rib is integrally formed with the valve and is narrower on the side close to the middle of the valve and wider on the side away from the middle of the valve.

3. The double valve dynamic circulation valve according to claim 2, characterized in that: The width of the elastic reinforcement rib increases gradually from the middle of the valve to the outer edge, with a gradient change ratio of 1:1.2 to 1:1.5, and the gradient change area accounts for 60-80% of the valve length.

4. The double valve dynamic circulation valve according to claim 3, characterized in that: The diaphragm is made of elastic silicone material, and the thickness of the diaphragm is 0.8-1.2mm; the height of the elastic reinforcing rib is 1.5-2 times the thickness of the diaphragm.

5. The double valve dynamic circulation valve according to claim 4, characterized in that: The support rod is a stainless steel-silicone composite structure, including an inner stainless steel core rod and an outer silicone coating layer. The thickness of the silicone coating layer is 0.3-0.6 times the diameter of the core rod, and silicon carbide particles are dispersed in the coating layer with a particle size of 5-20μm.

6. The double valve dynamic circulation valve according to claim 5, characterized in that: Also included is a diaphragm adjustment device, comprising: A first adjusting rod, which is perpendicular to the main pipeline and penetrates the outer wall of the main pipeline and extends into the main pipeline; A second adjusting rod, one end of which is coaxially clamped with the first adjusting rod, and the other end of which penetrates the side wall of the base and is provided with a first bevel gear; A rotating rod is coaxially rotatably sleeved on the supporting rod, one end of the rotating rod is provided with a second bevel gear meshing with the first bevel gear, and the other end of the rotating rod extends toward a direction close to the diaphragm; A moving rod, which is coaxially threadedly connected to the other end of the rotating rod and is axially slidably connected to the supporting rod; The abutment block is arranged at the other end of the moving rod and is made of elastic rubber or silicone material.

7. The double valve dynamic circulation valve according to claim 5, characterized in that: Also included is a diaphragm adjustment device, comprising: A driving rod, one end of which is located outside the housing, and the other end of which is sealed and rotatable and passes through the side wall of the housing to extend into the housing; A worm gear mechanism, wherein the worm gear seal rotates and penetrates the base and is coaxially clamped with the other end of the driving rod, and the worm gear is coaxially fixedly sleeved on the supporting rod; The abutment block is made of elastic silicone material. The abutment block is connected to the output end of the worm gear mechanism through a threaded sleeve and is located on the side of the elastic diaphragm away from the water inlet end. When the driving rod rotates, the worm gear mechanism pushes the abutment block to move axially, and the elastic diaphragm is elastically compensated by the abutment block.

8. The double-valve dynamic circulation valve according to claim 6 or 7, characterized in that: Also includes: Four optical fiber pressure sensors are evenly spaced along the circumferential direction and arranged on the inner wall of the fixing seat, and the optical fiber pressure sensors are arranged radially corresponding to the circumferential edge of the undeformed diaphragm; A motor, used for driving the first adjusting rod / driving rod to rotate; The controller is connected to the optical fiber pressure sensor. The controller receives the detection signal of the optical fiber pressure sensor and calculates the diaphragm pressure unevenness coefficient U, U=[max(Fi)-min(Fi)] / max(Fi). When U>0.15, the diaphragm adjustment device is started, the controller drives the motor to start, and the motor drives the first adjustment rod / driving rod to rotate, thereby performing compensation adjustment of the diaphragm.

9. The double valve dynamic circulation valve according to claim 8, characterized in that: The detection end surface of the optical fiber pressure sensor is covered with a hydrophobic nano coating, the coating thickness is ≤10 μm, the contact angle is ≥150°, and the sensor signal line is led out along the spiral groove on the outer wall of the fixing seat.

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