Dynamic flow balancing valve

Abstract

The present application relates to the technical fields of flow control valve, and discloses a dynamic flow balance valve, which comprises a valve body and a valve core assembly; the valve core assembly comprises a guide sleeve, a limiting sleeve and a valve core arranged coaxially; one side end of the guide sleeve is provided with a water inlet connected with a water inlet end; an adjustable flow hole and a fixed flow hole are sequentially arranged on the outer wall of the guide sleeve along the water flow direction; one side end of the limiting sleeve is provided with a water outlet connected with a water outlet end; the limiting sleeve fixedly sleeved with the inner wall of the valve body is fixedly sleeved on the other side end of the guide sleeve; the fixed flow hole is connected with the water outlet; the valve core which can reciprocate and slide is sleeved on the guide sleeve; the flow area of the adjustable flow hole is changed by the sliding of the valve core, so that the adjustable flow hole is connected with the water outlet or disconnected with the water outlet. The dynamic flow balance valve provided by the present application is not easy to be stuck between the valve core, the guide sleeve and the limiting sleeve, and has high stability; the adjustable flow hole and the fixed flow hole have small resistance coefficient and low noise.

Description

Technical Field

[0001] This invention relates to the field of flow control valve technology, and in particular to a dynamic flow balancing valve. Background Technology

[0002] With the rapid development and progress of valve technology, in order to ensure the stability of pipeline systems, the application of dynamic flow balancing valves in ship valve pipeline systems has gradually increased. Dynamic flow balancing valves are mainly used to solve dynamic hydraulic imbalance problems.

[0003] Currently, dynamic flow balancing valves from abroad are generally assembled as a single unit. This type of dynamic flow balancing valve is not convenient for later inspection, maintenance, and cleaning. After long-term operation, it leads to a decrease in control accuracy and an increase in energy consumption. On the other hand, dynamic flow balancing valves produced by domestic manufacturers generally have higher initial working pressures, lower flow accuracy, and the same problems exist in later inspection, maintenance, and cleaning, and their reliability is poor. Summary of the Invention

[0004] This invention provides a dynamic flow balancing valve to solve or partially solve the problem of poor reliability of existing dynamic flow balancing valves.

[0005] This invention provides a dynamic flow balancing valve, comprising: a valve body and a valve core assembly installed inside the valve body;

[0006] The valve core assembly includes a guide sleeve, a limiting sleeve, and a valve core in a sleeve structure arranged coaxially; one end of the guide sleeve is provided with an inlet connected to the inlet end, and an adjustable flow orifice and a fixed flow orifice are sequentially provided on the outer wall of the guide sleeve along the water flow direction; one end of the limiting sleeve is provided with an outlet connected to the outlet end.

[0007] The limiting sleeve, which is fixedly connected to the inner wall of the valve body, is fixedly fitted onto the other end of the guide sleeve; the fixed flow orifice is connected to the outlet, and the valve core, which can slide back and forth, is fitted onto the outer wall of the guide sleeve. The flow area of ​​the adjustable flow orifice is changed by the sliding of the valve core, so that the adjustable flow orifice is connected to or disconnected from the outlet.

[0008] Based on the above technical solution, the end of the valve core can be detachably connected to the other end of the limiting sleeve.

[0009] Based on the above technical solution, the dynamic flow balancing valve also includes an elastic element sleeved on the guide sleeve;

[0010] One end of the elastic element is connected to the end of the valve core, and the other end is connected to one end of the limiting sleeve.

[0011] Based on the above technical solution, the dynamic flow balancing valve also includes a limiting member fixedly connected to the inner wall of the valve body, and the end of the valve core is detachably connected to the limiting member.

[0012] Based on the above technical solution, the valve body is a hollow Y-shaped cylinder.

[0013] Based on the above technical solution, the fixed flow orifice is a rectangular orifice, and the axisymmetric adjustable flow orifice is formed by two gradually decreasing flow areas connected together along the water flow direction.

[0014] Based on the above technical solution, the fixed flow orifice includes rectangular orifices and circular orifices arranged sequentially along the water flow direction; the axisymmetric adjustable flow orifice is formed by two gradually decreasing flow areas connected together along the water flow direction.

[0015] Based on the above technical solution, the fixed flow orifice includes a plurality of circular holes arranged along the circumferential direction of the guide sleeve, and the axisymmetric adjustable flow orifice is formed by connecting a rectangular hole and two gradually decreasing flow area along the water flow direction, with the rectangular hole arranged close to the circular holes.

[0016] Based on the above technical solution, the fixed flow orifice includes two sets of circular holes arranged sequentially along the water flow direction; one set of the circular holes is arranged sequentially along the circumferential direction of the guide sleeve and the diameters of two adjacent circular holes are different; the axisymmetric adjustable flow orifice is formed by two gradually decreasing flow areas connected together along the water flow direction.

[0017] Based on the above technical solution, the fixed flow orifice includes two sets of circular holes arranged sequentially along the water flow direction; one set of the circular holes is arranged sequentially along the circumferential direction of the guide sleeve and the diameters of two adjacent circular holes are different; the axisymmetric adjustable flow orifice is formed by four gradually decreasing flow areas connected together along the water flow direction, the flow areas of two adjacent gradually decreasing flow areas are different, and the flow areas of two symmetrical gradually decreasing flow areas are the same.

[0018] This invention provides a dynamic flow balancing valve. Water flows in from the inlet end of the valve body, enters the guide sleeve through the inlet port, flows out through the adjustable flow orifice and the fixed flow orifice, and then passes through the outlet port on the limiting sleeve to reach the outlet end. When the actual pressure difference is lower than the minimum starting pressure difference, the valve core is in a stationary state, meaning the adjustable flow orifice is at its maximum flow area. When the actual pressure difference exceeds the minimum starting pressure difference, as long as it is within the preset pressure difference range, the valve core slides along the direction of water flow as the pressure difference increases, gradually blocking the adjustable flow orifice. At this time, the flow area of ​​the adjustable flow orifice gradually decreases to maintain a constant flow rate. The dynamic flow balancing valve provided by this invention is less prone to jamming between the valve core, guide sleeve, and limiting sleeve, has good guiding performance, and strong stability; the adjustable flow orifice and the fixed flow orifice have low resistance coefficients, resulting in low noise. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a dynamic flow balancing valve according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of an adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of another adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of another adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of another adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of another adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of another adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of another adjustable flow orifice and a fixed flow orifice according to an embodiment of the present invention.

[0028] Figure label:

[0029] 1. Valve core; 2. Guide sleeve; 3. Limiting sleeve; 4. Limiting element; 5. Adjustable flow orifice; 6. Fixed flow orifice. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Currently, the control accuracy of dynamic flow balancing valves launched by various domestic and foreign companies is still relatively low in their applications. The flow control accuracy of many dynamic flow balancing valves is still less than ±5%. Low control accuracy directly leads to energy waste. Therefore, to improve dynamic flow balancing valves, it is necessary to first improve their control accuracy. In the operation of existing dynamic flow balancing valves, the initial pressure difference at the fluid inlet generally needs to exceed a predetermined pressure difference before the dynamic flow balancing valve can start working. This reduces the adjustment range of the dynamic flow balancing valve and makes it impossible to achieve the predetermined accuracy requirements. During the operation of the dynamic flow balancing valve, when it is about to reach or reaches the maximum working pressure difference, the throttling is severe, which causes vibration. This leads to the valve core assembly fluttering, causing frequent irregular changes in the fluid. Vibration will seriously affect the stability of the dynamic flow balancing valve.

[0033] to this end, Figure 1 This is a schematic diagram of the structure of a dynamic flow balancing valve according to an embodiment of the present invention, as shown below. Figure 1 As shown, the dynamic flow balancing valve of this embodiment includes: a valve body and a valve core assembly installed inside the valve body;

[0034] The valve core assembly includes a guide sleeve 2, a limiting sleeve 3, and a valve core 1 in a sleeve structure arranged coaxially; one end of the guide sleeve 2 is provided with an inlet that communicates with the inlet end; an adjustable flow hole 5 and a fixed flow hole 6 are sequentially provided on the outer wall of the guide sleeve 2 along the water flow direction; one end of the limiting sleeve 3 is provided with an outlet that communicates with the outlet end.

[0035] The limiting sleeve 3, which is fixedly connected to the inner wall of the valve body, is fixedly fitted on the other end of the guide sleeve 2; the fixed flow hole 6 is connected to the outlet, and the reciprocating valve core 1 is fitted on the outer wall of the guide sleeve 2. The flow area of ​​the adjustable flow hole 5 is changed by the sliding of the valve core 1 so that the adjustable flow hole 5 is connected to or disconnected from the outlet.

[0036] It should be noted that an adjustable flow orifice 5 and a fixed flow orifice 6 are sequentially provided on the outer wall of the guide sleeve 2 along the axial direction of the guide sleeve 2, that is, along the water flow direction, and the flow area of ​​the adjustable flow orifice 5 gradually decreases along the water flow direction.

[0037] It is understandable that the fixed flow orifice 6 is always connected to the outlet, that is, the fixed flow orifice 6 is always connected to the outlet end. In the initial state, both the adjustable flow orifice 5 and the fixed flow orifice 6 are connected to the outlet; during the switching process, driven by the pressure provided by the water, the valve core 1 slides along the water flow direction, at which time the flow area of ​​the adjustable flow orifice 5 gradually decreases.

[0038] In this embodiment of the invention, water flows in from the inlet end of the valve body and enters the interior of the guide sleeve 2 through the inlet on the guide sleeve 2. It then flows out through the adjustable flow orifice 5 and the fixed flow orifice 6, and finally reaches the outlet end through the outlet on the limiting sleeve 3. When the actual pressure difference is lower than the minimum starting pressure difference, the valve core 1 is stationary, meaning the adjustable flow orifice 5 is at its maximum flow area. When the actual pressure difference exceeds the minimum starting pressure difference, as long as it is within the preset pressure difference range, as the pressure difference increases, the valve core 1 slides along the direction of water flow, gradually blocking the adjustable flow orifice 5. At this time, the flow area of ​​the adjustable flow orifice 5 gradually decreases to maintain a constant flow rate. The dynamic flow balancing valve provided in this embodiment of the invention is less prone to jamming between the valve core 1, the guide sleeve 2, and the limiting sleeve 3, exhibiting good guidance and strong stability. The adjustable flow orifice 5 and the fixed flow orifice 6 have low resistance coefficients, resulting in low noise.

[0039] Based on the above embodiments, the end of the valve core 1 can be detachably connected to the other end of the limiting sleeve 3.

[0040] In this embodiment of the invention, one end of the limiting sleeve 3 is a circular outlet, and the other end of the limiting sleeve 3 is open. One end of the guide sleeve is open, and one end of the guide sleeve 2 can serve as an inlet. The other end of the guide sleeve 2 is fixed to one end of the limiting sleeve 3, meaning that the other end of the guide sleeve 2 and one end of the limiting sleeve 3 are on the same horizontal plane. The distance between the central axis of the outlet and the central axis of the limiting sleeve 3 is greater than the outer diameter of the guide sleeve 2.

[0041] Understandably, there are several scenarios depending on the relationship between the outer diameter of the valve core 1 and the inner diameter of the limiting sleeve 3. First scenario: When the outer diameter of the valve core 1 is smaller than the inner diameter of the limiting sleeve 3, the valve core 1 will slide along the water flow direction on the outer wall of the guide sleeve 2 and enter the interior of the limiting sleeve 3 from the other end. In this case, it is necessary to ensure that the sliding of the valve core 1 does not block the fixed flow orifice 6. Both the adjustable flow orifice 5 and the fixed flow orifice 6 can be located inside the limiting sleeve 3.

[0042] The second type: When the size of the valve core 1 is the same as the size of the limiting sleeve 3, that is, the valve core 1 cannot enter the interior of the limiting sleeve 3, it is necessary to ensure that the sliding of the valve core 1 will not block the fixed flow hole 6. At this time, the position of the fixed flow hole 6 can be located inside the limiting sleeve 3, and the position of the adjustable flow hole 5 must be located outside the limiting sleeve 3; the upper edges of both sides of the valve core 1 are formed with protrusions in the direction towards the guide sleeve 2.

[0043] The third type: When the inner diameter of the valve core 1 is greater than the outer diameter of the limiting sleeve 3, that is, the valve core 1 cannot enter the interior of the limiting sleeve 3, the sliding of the valve core 1 will not block the fixed flow hole 6. At this time, the position of the fixed flow hole 6 can be located inside or outside the limiting sleeve 3, and the position of the adjustable flow hole 5 must be located outside the limiting sleeve 3.

[0044] The following explanation uses the third case as an example. Valve core 1 includes a first sleeve and a second sleeve arranged coaxially and connected. The first sleeve and the second sleeve can be integrally set. The inner diameter of the first sleeve is larger than the outer diameter of the guide sleeve 2. Protrusions are formed on both ends of the first sleeve in the direction towards the guide sleeve 2. The guide sleeve 2 is located inside the first sleeve. The first sleeve slides along the direction of water flow. The protrusions slowly block the adjustable flow orifice 5. That is, the part of the adjustable flow orifice 5 that is blocked is located inside the first sleeve. At this time, the flow area of ​​the adjustable flow orifice 5 gradually decreases.

[0045] The inner diameter of the second sleeve is larger than the outer diameter of the first sleeve, and the inner diameter of the second sleeve is larger than the outer diameter of the limiting sleeve 3. A protrusion is formed on one end of the second sleeve in the direction toward the guide sleeve 2, and this protrusion is connected to one end of the first sleeve. The first and second sleeves constitute a stepped valve core 1. At the same time, a protrusion is formed on the other end of the limiting sleeve 3 in the circumferential direction in the direction away from the guide sleeve 2, and the other end of the second sleeve is adapted to this protrusion.

[0046] Based on the above embodiments, the dynamic flow balancing valve also includes an elastic element sleeved on the guide sleeve 2; one end of the elastic element is connected to the end of the valve core 1, and the other end is connected to one side end of the limiting sleeve 3.

[0047] It should be noted that the elastic element can be a spring, that is, one end of the spring is fixedly connected to the protrusion of the first sleeve, and the other end of the spring is fixedly connected to one side end of the limiting sleeve 3.

[0048] In this embodiment of the invention, water flows in from the inlet end of the valve body and enters the interior of the guide sleeve 2 through the inlet on the guide sleeve 2. It then flows out through the adjustable flow orifice 5 and the fixed flow orifice 6, and finally reaches the outlet end through the outlet on the limiting sleeve 3. When the actual pressure difference is lower than the minimum starting pressure difference, the valve core 1 is in a stationary state, meaning the adjustable flow orifice 5 is in the maximum flow area state. When the actual pressure difference exceeds the minimum starting pressure difference, as long as it is within the preset pressure difference range, as the pressure difference increases, the valve core 1 slides along the direction of water flow, slowly blocking the adjustable flow orifice 5. The spring is in a compressed state, and the flow area of ​​the adjustable flow orifice 5 gradually decreases. After the adjustment is completed, under the restoring force provided by the spring, the valve core 1 returns to its original state, meaning the adjustable flow orifice 5 is in the maximum flow area state.

[0049] Based on the above embodiments, the dynamic flow balancing valve also includes a limiting member 4 that is fixedly connected to the inner wall of the valve body, and the end of the valve core 1 is detachably connected to the limiting member 4.

[0050] It should be noted that the limiting member 4 can be a sleeve structure, with the inner diameter of the limiting member 4 matching the outer diameter of the first sleeve, and the inner diameter of the second sleeve being larger than the inner diameter of the limiting member 4. The installation position of the limiting member 4 needs to ensure that under the restoring force provided by the spring, the valve core 1 can return to its original state, i.e., the adjustable flow orifice 5 is in the maximum flow area state, and the end of the first sleeve will not contact the inner wall of the valve body.

[0051] In this embodiment of the invention, when the actual pressure difference exceeds the minimum starting pressure difference, as long as it is within the preset pressure difference range, as the pressure difference increases, the valve core 1 slides along the direction of water flow, slowly blocking the adjustable flow orifice 5. The spring is in a compressed state, and at this time the flow area of ​​the adjustable flow orifice 5 gradually decreases. After the adjustment is completed, under the restoring force provided by the spring, the valve core 1 returns to its original state, and the adjustable flow orifice 5 is in the state of maximum flow area. At this time, the protrusion of the second sleeve just contacts the limiting member 4.

[0052] Based on the above embodiments, the valve body is a hollow Y-shaped cylinder.

[0053] It should be noted that the two branches are connected, with the port of the first branch set as the inlet and the port of the second branch set as the outlet, and the inlet and outlet are located on the same straight line; the valve core assembly is installed at an angle in the second branch of the valve body.

[0054] In this embodiment of the invention, a certain pressure difference is formed between the inlet and outlet of the dynamic flow balancing valve. Under the action of water pressure and the high-precision spring installed inside, the valve core 1 extends and retracts along the water flow direction. When the pressure difference is below the working range, the valve core 1 is fully ejected under the preload of the high-precision spring. At this time, the fixed flow orifice 6 and the adjustable flow orifice 5 are fully open, and the water flow will pass through the fixed flow orifice 6 and the fully open adjustable flow orifice 5, which has the largest flow area. When the pressure difference is within the working range, the valve core 1 will extend and retract with the change of the pressure difference between the inlet and outlet. By controlling the flow area of ​​the adjustable flow orifice 5, the output flow rate is kept constant within a certain range. When the inlet and outlet ratio exceeds the working range, the adjustable flow orifice 5 is completely blocked, and the fluid only passes through the fixed flow orifice 6, which has the smallest flow area.

[0055] Based on the above embodiments, such as Figure 2 As shown, the fixed flow orifice 6 is a rectangular orifice, and the adjustable flow orifice 5 is formed by two gradually decreasing flow areas connected together along the water flow direction.

[0056] It should be noted that there is a certain distance between the fixed flow orifice 6 and the adjustable flow orifice 5. Both the fixed flow orifice 6 and the adjustable flow orifice 5 are axisymmetric structures, and the force exerted by the fluid on the fixed flow orifice 6 and the adjustable flow orifice 5 is symmetrically distributed, which can prevent mechanical locking under working conditions.

[0057] Based on the above embodiments, such as Figure 3 As shown, the fixed flow orifice 6 includes rectangular holes and circular holes arranged sequentially along the axial direction of the guide sleeve 2; multiple rectangular holes and multiple circular holes are arranged along the circumferential direction of the guide sleeve 2; the adjustable flow orifice 5 is formed by two gradually decreasing flow areas connected together along the water flow direction.

[0058] It should be noted that the length direction of the rectangular orifice is consistent with the water flow direction, the multiple circular orifices are arranged axially symmetrically, the adjustable flow orifice 5 is arranged axially symmetrically, and two sets of rectangular orifices can be set along the water flow direction, with the second set of rectangular orifices located outside the first set of rectangular orifices. Both sets of rectangular orifices are arranged axially symmetrically, and each set of rectangular orifices can include two rectangular orifices.

[0059] Based on the above embodiments, such as Figure 4 As shown, the fixed flow orifice 6 includes multiple circular holes arranged along the circumferential direction of the guide sleeve 2, and the adjustable flow orifice 5 is formed by connecting a rectangular hole and two gradually decreasing flow area holes along the water flow direction, with the rectangular hole arranged close to the circular hole.

[0060] It should be noted that both the adjustable flow orifice 5 and the fixed flow orifice 6 are axisymmetric structures. The fixed flow orifice 6 may include four circular orifices, and the width direction of the rectangular orifice is consistent with the water flow direction. Among them, the two gradient orifices are arranged in an axisymmetric manner.

[0061] Based on the above embodiments, such as Figure 5 As shown, the fixed flow orifice 6 includes two sets of circular holes arranged sequentially along the axial direction of the guide sleeve 2; one set of circular holes is arranged sequentially along the circumferential direction of the guide sleeve 2, and the diameters of two adjacent circular holes are different; the adjustable flow orifice 5 is formed by two gradually decreasing flow areas connected together along the water flow direction.

[0062] It should be noted that the adjustable flow orifice 5 has an axisymmetric structure, with a first group of circular orifices and a second group of circular orifices arranged sequentially along the water flow direction. The first group of circular orifices has an axisymmetric structure, including one circular orifice, and the second group of circular orifices includes four circular orifices. The diameters of two circular orifices spaced apart are the same.

[0063] It is understandable that the other end of the guide sleeve 2 is provided with a water outlet hole, which is connected to the water outlet end.

[0064] Based on the above embodiments, such as Figure 6 As shown, the fixed flow orifice 6 includes two sets of circular holes arranged sequentially along the axial direction of the guide sleeve 2; one set of circular holes is arranged sequentially along the circumferential direction of the guide sleeve 2, and the diameters of two adjacent circular holes are different; the axisymmetric adjustable flow orifice 5 is formed by four gradually decreasing flow areas connected together along the water flow direction, the flow areas of two adjacent gradually decreasing flow areas are different, and the flow areas of two symmetrical gradually decreasing flow areas are the same.

[0065] It should be noted that the adjustable flow orifice 5 has an axisymmetric structure, with a first group of circular orifices and a second group of circular orifices arranged sequentially along the water flow direction. The first group of circular orifices has an axisymmetric structure, including one circular orifice, and the second group of circular orifices includes four circular orifices. The diameters of two circular orifices spaced apart are the same.

[0066] Based on the above embodiments, such as Figure 7 As shown, the fixed flow orifice 6 includes multiple circular holes arranged along the circumferential direction of the guide sleeve 2, with adjacent circular holes having different diameters; the adjustable flow orifice 5 is formed by connecting a rectangular hole and two gradually decreasing flow area holes along the water flow direction, with the rectangular hole arranged close to the circular hole.

[0067] It should be noted that the adjustable flow orifice 5 has an axisymmetric structure, and the fixed flow orifice 6 may include four circular orifices, with two spaced-apart circular orifices having the same diameter. The width direction of the rectangular orifice is consistent with the water flow direction. Among them, the two gradient orifices are arranged axisymmetrically.

[0068] Based on the above embodiments, such as Figure 8 As shown, the fixed flow orifice 6 includes multiple holes arranged along the circumferential direction of the guide sleeve 2; the adjustable flow orifice 5 is a gradient orifice.

[0069] It should be noted that the fixed flow orifice 6 may include four holes, which are arranged in sequence along the circumferential direction of the guide sleeve 2: a first circular hole, a rectangular hole, a second circular hole, and a third circular hole. The diameters of the first circular hole and the second circular hole are the same.

[0070] It is understandable that the other end of the guide sleeve 2 is provided with a water outlet hole, which is connected to the water outlet end.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic flow balancing valve, characterized in that, include: Valve body and valve core assembly installed inside the valve body; The valve core assembly includes a guide sleeve, a limiting sleeve, and a valve core in a sleeve structure arranged coaxially; one end of the guide sleeve is provided with an inlet connected to the inlet end, and an adjustable flow orifice and a fixed flow orifice are sequentially provided on the outer wall of the guide sleeve along the water flow direction; one end of the limiting sleeve is provided with an outlet connected to the outlet end. The limiting sleeve, which is fixedly connected to the inner wall of the valve body, is fixedly fitted onto the other end of the guide sleeve; the fixed flow orifice is connected to the outlet, and the valve core, which can slide back and forth, is fitted onto the outer wall of the guide sleeve. The flow area of ​​the adjustable flow orifice is changed by the sliding of the valve core, so that the adjustable flow orifice is connected to or disconnected from the outlet. The end of the valve core can be detachably connected to the other end of the limiting sleeve; The dynamic flow balancing valve also includes an elastic element sleeved on the guide sleeve; one end of the elastic element is connected to the end of the valve core, and the other end is connected to one end of the limiting sleeve. The dynamic flow balancing valve also includes a limiting member fixedly connected to the inner wall of the valve body, and the end of the valve core is detachably connected to the limiting member; The valve body is a hollow Y-shaped cylinder.

2. The dynamic flow balancing valve according to claim 1, characterized in that, The fixed flow orifice is a rectangular orifice, and the axisymmetric adjustable flow orifice is formed by two gradually decreasing flow areas connected together along the water flow direction.

3. The dynamic flow balancing valve according to claim 1, characterized in that, The fixed flow orifice includes rectangular and circular orifices arranged sequentially along the water flow direction; the axisymmetric adjustable flow orifice is formed by two gradually decreasing flow areas connected together along the water flow direction.

4. The dynamic flow balancing valve according to claim 1, characterized in that, The fixed flow orifice includes a plurality of circular holes arranged along the circumferential direction of the guide sleeve. The axisymmetric adjustable flow orifice is formed by connecting a rectangular hole and two gradually decreasing flow area holes along the water flow direction. The rectangular hole is arranged close to the circular holes.

5. The dynamic flow balancing valve according to claim 1, characterized in that, The fixed flow orifice includes two sets of circular holes arranged sequentially along the water flow direction; one set of the circular holes is arranged sequentially along the circumferential direction of the guide sleeve and the diameters of two adjacent circular holes are different; the axisymmetric adjustable flow orifice is formed by two gradually decreasing flow areas connected together along the water flow direction.

6. The dynamic flow balancing valve according to claim 1, characterized in that, The fixed flow orifice includes two sets of circular holes arranged sequentially along the water flow direction; one set of the circular holes is arranged sequentially along the circumferential direction of the guide sleeve and the diameters of two adjacent circular holes are different; the axisymmetric adjustable flow orifice is formed by four gradually decreasing flow areas connected together along the water flow direction, the flow areas of two adjacent gradually decreasing flow areas are different, and the flow areas of two symmetrical gradually decreasing flow areas are the same.

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