A dynamic balance pressure reducing valve

Abstract

The utility model provides a kind of dynamic balance pressure reducing valve, valve body is equipped with inflow passage and outflow passage, the side wall of valve body is equipped with hollow neck, inflow passage, outflow passage and neck inner cavity are mutually communicated with the valve cavity of valve body;Pressure reducing valve core includes valve core body, and dynamic balance assembly is equipped in valve core body;Valve core body is installed between the valve cavity wall and neck, and the valve core body is located between inflow passage and outflow passage;Throttle chamber that can dynamically change is equipped in valve core body, inlet is equipped on the side wall of valve core body, and the inlet is mutually communicated with inflow passage and throttle chamber;One end of valve core body is equipped with outlet, and outlet is mutually communicated with throttle chamber and outflow passage;Liquid flows from inflow passage, after passing through the inlet of valve core body, throttle chamber and outlet, from outflow passage. The pressure reducing valve can effectively solve the problem that the assembly precision, the machining precision requirement is high, the sealing performance is poor and the movement is easy to jam caused by the separation of adjusting element and valve cover in the existing dynamic balance pressure reducing valve.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and more specifically to a dynamic balance pressure reducing valve. Background Technology

[0002] In the field of fluid control, pressure reducing valves are key devices for regulating pipeline pressure and flow. Their structural design directly affects the regulation accuracy, stability, and ease of assembly and maintenance. Traditional pressure reducing valves mostly adopt a structure in which the valve disc and valve body boss cooperate, and the fluid flows in a "U" shape inside the valve. This requires multiple changes in flow direction, resulting in problems such as high flow resistance, limited pressure regulation range, and reliance on downstream pressure feedback.

[0003] To address the aforementioned issues, a dynamic balance pressure reducing valve (such as CN118423483A) has been disclosed in the prior art. Its core design is as follows: the regulating element and the valve cover adopt a separate structure, with no direct fixed connection between them. They only form a throttling orifice through functional contact. The regulating element is linked with the elastic element in the valve cover through a piston. The inlet pressure before the valve directly drives the regulating element to move in the second direction to adjust the gap between it and the valve cover, thereby achieving dynamic balance between pressure and flow, without relying on feedback from the outlet pressure after the valve.

[0004] However, this structure, in which the regulating element is separated from the valve cover, still has the following technical drawbacks in practical applications: High precision machining and assembly are required. Factors such as component dimensional deviations, form and position deviations, inconsistent datums, and machining errors can cause the central axes of the valve body, valve cover, regulating element, and piston to be misaligned, leading to twisting of the seals, accelerated wear, and shortened product lifespan. Furthermore, it can cause jamming of the regulating element, affecting pressure regulation accuracy and resulting in delayed pressure reduction.

[0005] The pressure regulating element's end face fits snugly against the valve cover, forming a sealing pair. This is a hard seal, not a soft seal. Hard seals require high precision in surface roughness and flatness, increasing the difficulty of product manufacturing. Furthermore, impurities, impacts, or uneven assembly forces can easily lead to incomplete sealing and leakage. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a dynamic balance pressure reducing valve, which can effectively solve the problems of high assembly accuracy and machining accuracy requirements, poor sealing performance and easy jamming caused by the separation of the regulating element and the valve cover in the existing dynamic balance pressure reducing valve, thereby improving the assembly convenience, sealing reliability and adjustment stability of the product.

[0007] The technical solution of this utility model is to provide a dynamic balance pressure reducing valve, including a valve body, wherein the valve body has an inflow channel and an outflow channel, and a hollow protruding neck is provided on the side wall of the valve body. The inflow channel, the outflow channel, and the inner cavity of the protruding neck are all interconnected with the valve cavity of the valve body. It also includes a pressure reducing valve core and a valve cover. The pressure reducing valve core includes a valve core body, and a dynamic balancing component is provided within the valve core body. The valve core body is installed between the valve cavity wall and the protruding neck, and is located between the inflow channel and the outflow channel. The valve core body has a dynamically variable throttling orifice, and an inlet is provided on the side wall of the valve core body, which is interconnected with the inflow channel and the throttling orifice. One end of the valve core body has an outlet, which is interconnected with the throttling orifice and the outflow channel. Liquid flows in from the inflow channel, passes through the inlet, throttling orifice, and outlet of the valve core body, and then flows out from the outflow channel.

[0008] Compared with the prior art, the dynamic balance pressure reducing valve of this utility model has the following advantages: This technical solution installs the valve core body of the pressure reducing valve core between the valve cavity wall and the protruding neck, so that the dynamic balance component is integrated into the valve core body to form an integral structure with a dynamically changing throttling orifice. This effectively solves the problems of high assembly accuracy requirements, poor sealing performance and easy jamming caused by the separation of the regulating element and the valve cover in the existing dynamic balance pressure reducing valve, and improves the assembly convenience, sealing reliability and adjustment stability of the product.

[0009] As an improvement, the dynamic balancing assembly includes a piston and an adjusting element with a first through hole; a partition with a second through hole is provided in the inner cavity of the valve core, the partition dividing the inner cavity of the valve core into a first cavity and a second cavity, the inlet being located on the cavity wall of the first cavity, and the first cavity communicating with the outlet; the adjusting element is axially slidably fitted in the first cavity, and the adjusting element and the partition forming the throttling orifice; the piston plate of the piston is located in the second cavity, and the piston rod of the piston passes through the second through hole and is connected to the adjusting element; the axial sliding of the piston can drive the adjusting element to slide axially, thereby dynamically adjusting the flow cross-sectional area of ​​the throttling orifice. With this structure, the dynamic balancing assembly is integrated into the valve core, and the cavities are separated by a partition, allowing the piston to drive the adjusting element to slide axially to dynamically adjust the flow cross-sectional area of ​​the throttling orifice, reducing the assembly precision requirements.

[0010] As an improvement, the valve core body is equipped with a filter screen. The filter screen is annular and is fitted onto the valve core body, blocking the outside of the valve core body's inlet. With this structure, the annular filter screen fitted onto the valve core body and blocking the outside of the inlet filters out impurities from the incoming liquid, preventing impurities from entering the throttling orifice and affecting the sliding of the regulating element and piston, reducing component wear, extending equipment lifespan, and ensuring stable operation of the dynamic regulation function.

[0011] As an improvement, the outer wall of the valve core is provided with an annular groove that matches the filter screen. The filter screen is nested in the annular groove, and the inlet is located at the bottom of the annular groove. With this structure, the annular groove on the outer wall of the valve core allows the annular filter screen to be nested, and the inlet is located at the bottom of the groove, making the filter screen more securely installed and less prone to displacement. It can more accurately block impurities from the inlet, preventing the throttling port and internal components from being affected by impurities.

[0012] As an improvement, the adjusting element includes a cylindrical body that matches the inner wall of the first cavity, and a crossbar is provided inside the cylindrical body; the cylindrical body is slidably fitted inside the first cavity and is sealed to the cavity wall of the first cavity; the end of the piston rod is fixedly connected to the crossbar. With this structure, the connection between the crossbar and the piston rod, and the sealed fit between the cylindrical body and the cavity wall, enhances sliding stability, improves sealing performance, makes the flow cross-sectional area adjustment of the throttling orifice precise and reliable, and reduces the risk of leakage.

[0013] As an improvement, the crossbar has a first through hole in its middle section. This first through hole is a threaded hole, and the end of the piston rod is threaded into this threaded hole. The side wall of the piston rod is fixed to the wall of the threaded hole by adhesive. With this structure, the piston rod end is connected to the threaded hole in the middle of the crossbar and fixed by adhesive, ensuring a strong connection between the two. This facilitates precise alignment during assembly, prevents loosening or misalignment during linkage, and allows the adjusting element to move synchronously and stably with the piston.

[0014] As an improvement, the partition plate has a recessed platform on the side near the first cavity, and a T-shaped sealing gasket is installed inside the recessed platform. A T-shaped pressure plate is fitted around the piston rod, and the T-shaped pressure plate connects to the second through hole and presses and fixes the T-shaped sealing gasket tightly inside the recessed platform of the partition plate. With this structure, the T-shaped sealing gasket cooperates with the cylindrical body and end face of the adjusting element, which can effectively improve the sealing performance, enhance the accuracy of the throttling chamber pressure adjustment, and improve the overall sealing reliability.

[0015] As an improvement, the valve cover is provided with a threaded adjustment hole that communicates with the inner cavity of the protruding neck. An adjusting nut is threaded into the adjusting hole, and an elastic element is provided between the adjusting nut and the piston plate of the piston. With this structure, the preload of the elastic element can be easily adjusted by rotating the adjusting nut, the initial pressure can be accurately set, the flexibility and accuracy of pressure adjustment are improved, and the debugging operation is simplified.

[0016] As an improvement, the elastic element is a pressure-adjusting spring. One end of the adjusting nut is provided with a first spring seat, and one side of the piston plate is provided with a second spring seat. The two ends of the pressure-adjusting spring are respectively sleeved on the first and second spring seats. This structure ensures the stability of the spring installation, prevents its offset or skew, makes the spring force transmission more uniform, improves the accuracy of preload adjustment, and enhances the stability of pressure regulation.

[0017] As an improvement, the second spring seat has a threaded connection hole on its end face, and its outer cylindrical surface is a flat rectangular structure. With this structure, during assembly, the threaded connection hole or outer cylindrical surface of the second spring seat can be connected to an auxiliary tool, serving as a support point for removing the pressure-reducing valve core, facilitating disassembly and assembly.

[0018] As an improvement, the inner wall of the valve cavity is provided with a connector that matches the outlet end of the valve core. The connector is coaxially arranged with the protruding neck. The end of the valve core is inserted into the connector, and the side wall of the valve core is sealed to the inner wall of the connector. With this structure, the inner wall of the valve cavity has a connector that matches the outlet end of the valve core, is coaxial with the protruding neck, and the end of the valve core is inserted into it and sealed, ensuring the coaxiality and stability of the valve core installation, simplifying assembly, enhancing the sealing of the connection, and preventing fluid leakage. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the dynamic balance pressure reducing valve of this utility model.

[0020] Figure 2 This is an exploded structural diagram of the dynamic balance pressure reducing valve of this utility model.

[0021] Figure 3 This is a bottom view of the pressure reducing valve core of the dynamic balance pressure reducing valve of this utility model.

[0022] Figure 4 This is a cross-sectional structural diagram of the pressure reducing valve core of the dynamic balance pressure reducing valve of this utility model.

[0023] Figure 5 This is an exploded structural diagram of the pressure reducing valve core of the dynamic balance pressure reducing valve of this utility model.

[0024] Figure 6 This is a top view of the pressure reducing valve core of the dynamic balance pressure reducing valve of this utility model.

[0025] As shown in the figure: Valve body 1, inflow channel 101, outflow channel 102, valve cavity 103, protruding neck 104, insertion port 105, pressure reducing valve core 2, valve core body 201, partition plate 202, first cavity 203, second cavity 204, annular groove 205, inlet 206, outlet 207, throttling port 208, second through hole 209, countersunk platform 210, valve cover 3, threaded adjustment hole 301, piston 4, piston plate 401, piston rod 402, second embedded groove 403, second spring seat 404, threaded connection hole 405, adjusting element 5, cylindrical body 501, crossbar 502, threaded hole 503, filter screen 6, T-shaped sealing gasket 7, T-shaped pressure plate 8, adjusting nut 9, adjusting spring 10, first embedded groove 901, first spring seat 902, dust cover 11. Detailed Implementation

[0026] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0027] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0028] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.

[0029] like Figures 1 to 6 As shown, this utility model discloses a dynamic balance pressure reducing valve, including a valve body 1, a pressure reducing valve core 2, and a valve cover 3.

[0030] The valve body 1 has an inflow channel 101 and an outflow channel 102 at its two ends, respectively. A valve cavity 103 is provided inside the valve body 1, and both the inflow channel 101 and the outflow channel 102 are interconnected with the valve cavity 103. A hollow protruding neck 104 is provided on the side wall of the valve body 1, and the inner cavity of the protruding neck 104 is interconnected with the valve cavity 103. The protruding neck 104 is inclined, with its outer end facing the inflow channel 101.

[0031] The pressure-reducing valve core 2 includes a valve core body 201, which is a cylindrical structure with openings at both ends. The inner cavity of the protruding neck 104 matches the valve core body 201, and the valve core body 201 is inserted into the inner cavity of the protruding neck 104. The inner end of the valve core body 201 extends into the valve cavity 103. The inner wall of the valve cavity 103 is provided with a insertion interface 105 that matches the end of the valve core body 201 with the outlet 207. The insertion interface 105 is coaxially arranged with the protruding neck 104, and the inner wall of the insertion interface 105 matches the side wall of the inner end of the valve core body 201. The end of the valve core 201 is inserted into the insertion interface 105. The side wall of the valve core 201 and the inner wall of the insertion interface 105 are sealed together. Specifically, the side wall of the valve core 201 has a sealing ring groove, and a sealing ring is installed in the sealing ring groove. The sealing ring seals between the side wall of the valve core 201 and the inner wall of the insertion interface 105. To improve the sealing effect, multiple sealing rings can be provided. The valve core 201 adopts a cylindrical structure, with openings at both ends and inserted into the inner cavity of the protruding neck 104. Its inner end extends into the valve cavity 103 and mates with the coaxially arranged insertion interface 105. The sealing connection is achieved through the sealing rings (multiple rings can be provided) in the sealing ring grooves on the side wall of the valve core 201, ensuring the coaxiality and stability of the valve core 201 installation, simplifying assembly, and enhancing the sealing effect through multiple sealing designs, effectively preventing leakage and improving the overall structural reliability.

[0032] The inner end of the valve core 201 is inserted into the insertion interface 105 of the valve cavity 103, so that the valve core 201 is installed between the inflow channel 101 and the outflow channel 102. The liquid enters from the inflow channel 101 and can only flow out from the outflow channel 102 after passing through the valve core 201.

[0033] The valve core 201 is equipped with a dynamic balancing assembly, which includes a piston 4 and an adjusting element 5. A partition 202 is provided within the inner cavity of the valve core 201, dividing the inner cavity into a first cavity 203 and a second cavity 204. An annular groove 205 is provided on the outer wall of the valve core 201, and an annular filter screen 6 is nested within the annular groove 205, the filter screen 6 matching the annular groove 205. An inlet 206 is provided at the bottom of the annular groove 205, and this inlet 206 is located on the cavity wall of the first cavity 203, communicating with the inflow channel 101. In this specific embodiment, there are two inlets 206. The filter screen 6 covers the outside of the inlet 206 of the valve core 201, allowing liquid to pass through the filter screen 6 before entering the inlet 206. The valve core 201 is inserted into the connector 105, and the port at the end is the outlet 207, which is connected to the outflow channel 102. This structure integrates filtration, diversion, and dynamic adjustment. The filter screen 6 effectively intercepts impurities and protects internal components, thus improving the overall filtration effect, operational stability, and ease of assembly of the equipment.

[0034] The regulating element 5 includes a hollow cylindrical body 501, which matches the inner wall of the first cavity 203. The cylindrical body 501 slides within the first cavity 203, and is sealed to the wall of the first cavity 203 via a sealing ring. This is a conventional installation structure, and its specific details are not described further. A throttling orifice 208 is formed between the partition 202 and the end face of the cylindrical body 501, and the throttling orifice 208 communicates with the inlet 206 and outlet 207. The throttling orifice 208 can dynamically change with the movement of the regulating element 5. This structure ensures the stability and sealing of the sliding of the cylindrical body 501, allows for precise adjustment of the volume of the throttling orifice 208 to control the fluid, improves the accuracy and reliability of pressure and flow regulation, and simplifies the design of the sealing structure.

[0035] The piston 4 includes a piston plate 401 and a piston rod 402. The upper end of the piston rod 402 is connected to the middle of the lower surface of the piston plate 401. The piston plate 401 and the piston rod 402 are integrally formed. The piston plate 401 is slidably fitted within the second cavity 204. The partition 202 has a second through hole 209 in the middle. The piston rod 402 passes through the second through hole 209 and extends into the first cavity 203. The lower end of the piston rod 402 is connected to the adjusting element 5. The piston 4 adopts an integrally formed structure of piston plate 401 and piston rod 402. The piston plate 401 slides within the second cavity 204, and the piston rod 402 passes through the second through hole 209 of the partition 202 and connects to the adjusting element 5, realizing stable linkage between the piston 4 and the adjusting element 5. The one-piece molding design enhances structural strength and reduces assembly errors; the sliding fit between the piston plate 401 and the cavity, as well as the guiding effect of the piston rod 402, ensure the smooth movement of the adjusting element 5 and improve the accuracy and reliability of the dynamic adjustment of the throttle port 208.

[0036] The cylindrical body 501 of the adjusting element 5 contains a crossbar 502, and the middle part of the crossbar 502 has a threaded hole 503. The end of the piston rod 402 is threaded into the threaded hole 503, and the side wall of the piston rod 402 is fixedly connected to the wall of the threaded hole 503 by adhesive. The axial sliding of the piston 4 can drive the adjusting element 5 to slide axially, thereby dynamically adjusting the volume of the throttling orifice 208. The cylindrical body 501 of the adjusting element 5 contains a crossbar 502, and the end of the piston rod 402 is connected to and glued to the threaded hole 503 of the crossbar 502, making the piston 4 and the adjusting element 5 linked and stable. This connection method ensures the firmness and accuracy of the assembly of the two, and the axial sliding of the piston 4 reliably drives the adjusting element 5 to realize the dynamic adjustment of the volume of the throttling orifice 208.

[0037] The partition 202 has a recessed platform 210 on the side near the first cavity 203. A T-shaped sealing gasket 7 is installed inside the recessed platform 210. A T-shaped pressure plate 8 is fitted around the piston rod 402. The T-shaped pressure plate 8 connects to the second through hole 209 and presses the T-shaped sealing gasket 7 tightly within the recessed platform 210 of the partition 202. In this specific embodiment, the second through hole 209 is a threaded hole, and the T-shaped pressure plate 8 is threadedly connected to the second through hole 209. The recessed platform 210 on one side of the partition 202, with the T-shaped sealing gasket 7 inside, works in conjunction with the T-shaped pressure plate 8 on the piston rod 402 to form a reliable sealing structure. This design ensures a tight seal between the piston rod 402 and the partition 202, preventing fluid leakage between the two cavities. The pressure plate fixation enhances the stability of the sealing gasket, allowing for precise pressure adjustment of the throttle port 208.

[0038] The valve cover 3 has a threaded adjustment hole 301 that communicates with the inner cavity of the protruding neck 104. An adjusting nut 9 is threaded into the threaded adjustment hole 301. An elastic element, an adjusting spring 10, is provided between the adjusting nut 9 and the piston plate 401 of the piston 4. The lower end of the adjusting nut 9 has a first embedding groove 901, and the bottom of the first embedding groove 901 has a first spring seat 902. The upper side of the piston plate 401 has a second embedding groove 403, and the bottom of the second embedding groove 403 has a second spring seat 404. The two ends of the adjusting spring 10 are respectively sleeved on the first spring seat 902 and the second spring seat 404. The end face of the second spring seat 404 has a threaded connection hole 405, and the outer cylindrical surface of the second spring seat 404 has a flat rectangular structure.

[0039] A dust cover 11 is installed at the port of the adjusting nut 9 of the valve cover 3. The adjusting nut 9 at the threaded adjusting hole 301 of the valve cover 3 is connected to the piston plate 401 by an adjusting spring 10 with a spring seat, and the port of the adjusting nut 9 is equipped with a dust cover 11. This structure retains the function of precisely adjusting the spring preload through the adjusting nut 9, the spring seat ensures stable operation of the spring, and the dust cover 11 prevents dust and impurities from entering the adjusting mechanism, reducing the risk of wear and blockage and extending the service life of the adjusting components.

[0040] A sealing ring is provided between the valve core 201 and the inner side of the valve cover 3 for sealing connection. A sealing ring is provided between the piston plate 401 and the inner wall of the valve core 201 for sealing connection. A sealing ring is also provided between the cylindrical body 501 of the adjusting element 5 and the inner wall of the valve core 201 for sealing connection. The installation of the sealing rings are all conventional installation structures, which will not be described in detail here. Multiple sealing rings can be set at each sealing connection position, as needed.

[0041] The operation of the dynamic balance pressure reducing valve of this utility model is as follows: After the liquid enters from the inflow channel 101 of the valve body 1, it is first filtered by the filter screen 6 in the annular groove 205 on the outside of the valve core 201, and then enters the throttling port 208 of the first cavity 203 through the inlet 206 at the bottom of the groove (that is, the distance between the T-shaped sealing gasket and the end face of the cylindrical body of the adjusting element is the throttling port, and the back and forth movement of the cylindrical body will adjust the flow cross section of the throttling port), and finally flows into the outflow channel 102 from the outlet 207 of the valve core 201; when the fluid pressure changes, the piston plate 401 of the piston 4 slides axially under the pressure in the second cavity 204, and drives the cylindrical body 501 of the adjusting element 5 to slide in the first cavity 203 through the piston rod 402, dynamically changing the flow cross section of the throttling port 208 to balance the pressure; if it is necessary to adjust the initial pressure, the adjusting nut 9 of the valve cover 3 can be rotated to change the preload of the adjusting spring 10, and the dust cover 11 blocks impurities from entering the adjusting mechanism.

[0042] This dynamic balance pressure reducing valve, through its integrated structural design, forms a tightly linked whole with components such as the regulating element 5, piston 4, and valve cover 3, avoiding the excessively high requirements for assembly precision in existing separate structures and reducing assembly difficulty. The multi-position sealing setting and the T-shaped sealing gasket design ensure a soft seal between the partition and the end face of the cylindrical body, enhancing sealing reliability. The stable connection between piston 4 and regulating element 5 (threaded and adhesive bonding) and the guiding effect of the spring seat reduce the risk of movement jamming, improving adjustment stability and effectively solving the pain points of existing products.

[0043] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.

Claims

1. A dynamic balance pressure reducing valve, comprising a valve body (1), wherein the valve body (1) is provided with an inflow channel (101) and an outflow channel (102), and a hollow protruding neck (104) is provided on the side wall of the valve body (1), wherein the inner cavities of the inflow channel (101), the outflow channel (102) and the protruding neck (104) are all interconnected with the valve cavity (103) of the valve body (1); characterized in that: It also includes a pressure reducing valve core (2) and a valve cover (3). The pressure reducing valve core (2) includes a valve core body (201), which is provided with a dynamic balancing component. The valve core body (201) is installed between the wall of the valve cavity (103) and the protruding neck (104), and the valve core body (201) is located between the inflow channel (101) and the outflow channel (102). The valve core body (201) is provided with a dynamically changing throttling orifice (208), and the side wall of the valve core body (201) is provided with an inlet. (206) The inlet (206) is connected to the inflow channel (101) and the throttle port (208); one end of the valve core (201) is provided with an outlet (207), the outlet (207) is connected to the throttle port (208) and the outflow channel (102); the liquid flows in from the inflow channel (101), passes through the inlet (206), throttle port (208) and outlet (207) of the valve core (201), and then flows out from the outflow channel (102).

2. The dynamic balance pressure reducing valve according to claim 1, characterized in that: The dynamic balancing assembly includes a piston (4) and an adjusting element (5) with a first through hole; the valve core (201) has a partition (202) with a second through hole (209) in its inner cavity, the partition (202) dividing the inner cavity of the valve core (201) into a first cavity (203) and a second cavity (204), the inlet (206) is located on the cavity wall of the first cavity (203), and the first cavity (203) is connected to the outlet (207); the adjusting element (5) slides axially. The regulating element (5) and the partition plate (202) are connected in the first cavity (203) to form the throttle port (208); the piston plate (401) of the piston (4) is located in the second cavity (204), and the piston rod (402) of the piston (4) passes through the second through hole (209) and is connected to the regulating element (5); the axial sliding of the piston (4) can drive the regulating element (5) to slide axially, thereby dynamically adjusting the volume of the throttle port (208).

3. The dynamic balance pressure reducing valve according to claim 2, characterized in that: The valve core (201) is provided with a filter screen (6), which is annular and is fitted outside the valve core (201). The filter screen (6) covers the outside of the inlet (206) of the valve core (201).

4. The dynamic balance pressure reducing valve according to claim 3, characterized in that: The outer wall of the valve core (201) is provided with an annular groove (205) that matches the filter screen (6). The filter screen (6) is nested in the annular groove (205), and the inlet (206) is located at the bottom of the annular groove (205).

5. The dynamic balance pressure reducing valve according to claim 2, characterized in that: The adjusting element (5) includes a cylindrical body (501) that matches the inner wall of the first cavity (203), and a crossbar (502) is provided inside the cylindrical body (501); the cylindrical body (501) is slidably fitted inside the first cavity (203) and is sealed to the cavity wall of the first cavity (203); the end of the piston rod (402) is fixedly connected to the crossbar (502).

6. The dynamic balance pressure reducing valve according to claim 5, characterized in that: The crossbar (502) has a first through hole in the middle, which is a threaded hole (503). The end of the piston rod (402) is threaded into the threaded hole (503), and the side wall of the piston rod (402) is fixedly connected to the wall of the threaded hole (503) by adhesive.

7. The dynamic balance pressure reducing valve according to any one of claims 2 to 6, characterized in that: The partition (202) has a recessed platform (210) on the side near the first cavity (203). A T-shaped sealing gasket (7) is provided in the recessed platform (210). A T-shaped pressure plate (8) is fitted on the piston rod (402). The T-shaped pressure plate (8) is connected to the second through hole (209) and presses and fixes the T-shaped sealing gasket (7) in the recessed platform (210) of the partition (202).

8. The dynamic balance pressure reducing valve according to any one of claims 2 to 6, characterized in that: The valve cover (3) is provided with a threaded adjustment hole (301) that communicates with the inner cavity of the protruding neck (104). An adjustment nut (9) is threadedly connected to the threaded adjustment hole (301). An elastic element is provided between the adjustment nut (9) and the piston plate (401) of the piston (4).

9. The dynamic balance pressure reducing valve according to claim 8, characterized in that: The elastic element is an adjusting spring (10). One end of the adjusting nut (9) is provided with a first spring seat (902), and one side of the piston plate (401) is provided with a second spring seat (404). The two ends of the adjusting spring (10) are respectively sleeved on the first spring seat (902) and the second spring seat (404).

10. The dynamic balance pressure reducing valve according to any one of claims 1 to 6 and 9, characterized in that: The valve cavity (103) has an insertion interface (105) on its inner wall that matches the end of the valve core (201) with an outlet (207). The insertion interface (105) is coaxially arranged with the protruding neck (104). The end of the valve core (201) is inserted into the insertion interface (105), and the side wall of the valve core (201) is sealed to the inner wall of the insertion interface (105).

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