Regulating valve with flow-limiting buffer structure

Abstract

The invention discloses an adjusting valve with a flow limiting buffer structure, and relates to the technical field of valves, the adjusting valve comprises a valve body, the top of the valve body is fixedly connected with a top cover, the top of the valve body is fixedly connected with a bottom cover, the top of the top cover is slidably connected with a valve rod in a penetrating mode, and the bottom end of the valve rod is fixedly connected with a conical valve element; the inner wall of the valve body is fixedly connected with a partition plate, and a conical through hole matched with the conical valve element is formed in the partition plate. Impurities adhering to the outer surface of the conical valve element and the inner wall of the conical through hole can be automatically cleaned in the use process of the adjusting valve, normal use of the adjusting valve is prevented from being affected, when the material pressure is increased, the pressure can be buffered through the arranged flow limiting buffering mechanism, flowing of materials can be adjusted and limited, and the service life of the adjusting valve is prolonged. Therefore, fine control over the fluid flow is achieved, and impact and vibration caused by too high flow speed are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a regulating valve with a flow limiting and buffering structure. Background Art

[0002] In industrial fluid delivery systems, regulating valves play a vital role in regulating parameters such as the flow rate and pressure of the fluid. However, existing regulating valves are prone to water hammer when faced with sudden changes in flow, causing impacts on pipelines and equipment, and affecting the stability and service life of the system. At the same time, the flow limiting and buffering effects of traditional regulating valves are limited, making it difficult to meet the needs of high-precision and high-stability industrial control. Upon searching, a Chinese patent publication number CN116006741A discloses a pressure-reducing regulating valve with a flow limiting and buffering function, specifically relating to the field of natural gas delivery technology, including a connecting pipe mouth, a first pressure-reducing spring and an electromagnetic flowmeter, the outside of the connecting pipe mouth is connected to a flow limiting mechanism, the interior of the flow limiting mechanism is provided with a first pressure-reducing spring, and the outside of the connecting pipe mouth is provided with an electromagnetic flowmeter.

[0003] The above-mentioned technical solution can disperse and guide the gas pressure inside the first counter-flow channel to the greatest extent through the setting of the limit ring, buffer valve core, worm gear plate and first worm gear, so that the pressure reducing valve can perform state-adjusted pressure distribution according to the size of the gas pressure, and realize pressure distribution regulation when the instantaneous flow is too large. However, during use, some substances will contain impurities and will adhere to the outer surface of the valve core and the inner wall of the valve hole. The above-mentioned technical solution cannot clean the corresponding positions, which will affect normal use. In addition, the valve body structure is fixed, and each structure is installed inside the valve body, which is inconvenient for later disassembly and maintenance. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a regulating valve with a flow limiting and buffering structure, which solves the problems raised in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a regulating valve with a flow limiting buffer structure, comprising a valve body, wherein the top and the bottom of the valve body are respectively fixedly connected to a top cover and a bottom cover, the top of the top cover is slidably connected to a valve stem, the bottom end of the valve stem is fixedly connected to a conical valve core, the inner wall of the valve body is fixedly connected to a partition, the interior of the partition is provided with a conical through hole that matches the conical valve core, the upper surface of the partition is provided with a first cleaning mechanism that matches the conical valve core, the interior of the conical through hole is provided with a second cleaning mechanism that matches the conical through hole, the top of the bottom cover is provided with a driving mechanism that matches the first cleaning mechanism and the second cleaning mechanism, the outer surface of the valve body is respectively fixedly connected to an input pipe and an output end, the interior of the input pipe is provided with a flow limiting buffer mechanism, and the top of the top cover is provided with a reset mechanism that matches the valve stem; The first cleaning mechanism includes an annular frame rotatably connected to the upper surface of the partition, and two first spring telescopic rods are symmetrically fixedly connected to the top of the annular frame. The top of the first spring telescopic rod is fixedly connected to the first connecting block, and the outer surface of the first connecting block is slidably connected to a cross bar, and one end of the cross bar is fixedly connected to a first scraper that matches the outer surface of the conical valve core.

[0006] Through the above technical solution, the annular frame will drive the first scraper to rotate when it rotates, which can scrape the outer surface of the conical valve core to prevent impurities from adhering to the surface of the conical valve core, thereby affecting the normal use of the regulating valve. The first spring telescopic rod can make the first scraper always fit the surface of the conical valve core when the conical valve core is raised or lowered, and will push the first scraper to retract when the conical valve core is closed.

[0007] Preferably, one end of the cross bar is fixedly connected to a baffle, and a first return spring is fixedly connected between the baffle and the first connecting block.

[0008] Through the above technical solution, the first return spring can automatically drive the first scraper to return to its original position when the conical valve core rises to a certain height, so that the first scraper can fit the surface of the conical valve.

[0009] Preferably, the second cleaning mechanism includes a second spring telescopic rod arranged inside the conical through hole, the top end of the second spring telescopic rod is fixedly connected to a second connecting block, both sides of the second connecting block are rotatably connected to second scrapers that cooperate with the inner wall of the conical through hole, a torsion spring is fixedly connected between the outer surface of the second scraper and the second connecting block, and the top of the second connecting block is fixedly connected to a pressure rod that cooperates with the bottom of the conical valve core.

[0010] Through the above technical solution, the rotation of the second spring telescopic rod can drive the second scraper to rotate, so as to scrape off impurities adhering to the inner wall of the conical through hole to avoid affecting the sealing effect. When the conical valve core descends, the second connecting block is squeezed by the pressure rod, and the second scraper will be retracted. When the conical valve core rises, the second scraper can contact the inner wall of the conical through hole under the action of the second spring telescopic rod and the torsion spring.

[0011] Preferably, the driving mechanism includes a bracket fixedly connected to the top of the bottom cover, a first rotating shaft passing through the interior of the bracket and being rotatably connected, one end of the first rotating shaft is fixedly connected to a turbine, the bottom end of the second spring telescopic rod passes through the top of the bracket and is rotatably connected to the bracket, the upper surface of the partition passes through the second rotating shaft and is rotatably connected, the bottom ends of the second rotating shaft and the second spring telescopic rod are both fixedly connected to a first bevel gear, and the outer surface of the first rotating shaft is fixedly connected to two second bevel gears meshing with the first bevel gear.

[0012] Through the above technical solution, when the material passes through the regulating valve, it will drive the worm gear to rotate, and under the action of the second bevel gear and the first bevel gear, it can respectively drive the second spring telescopic rod and the second rotating shaft to rotate.

[0013] Preferably, the top end of the second rotating shaft is fixedly connected to a spur gear, and the outer surface of the annular frame is fixedly connected to an outer gear ring meshing with the spur gear.

[0014] Through the above technical solution, the second rotating shaft can drive the annular frame to rotate through the spur gear and the outer ring gear.

[0015] Preferably, the flow limiting buffer mechanism includes a support ring threadedly connected to the inside of the input pipe, one side of the support ring is fixedly connected to a center tube, the outer surface of the center tube is provided with a plurality of flow limiting holes, the outer surface of the center tube is slidingly covered with an adjustment cover, one end of the adjustment cover is fixedly connected to a connecting plate, and a second return spring is fixedly connected between the connecting plate and the support ring.

[0016] Through the above technical solution, when the inlet pressure of the material is too high, the adjustment cover will be squeezed and buffered under the action of the second return spring, so that the squeezing cover will block the flow limiting hole, reducing the area through which the material flows, thereby achieving fine control of the fluid flow rate, effectively reducing the flow rate of the fluid, and avoiding the impact and vibration caused by excessive flow rate.

[0017] Preferably, a rotating block is fixedly connected to one side of the central tube.

[0018] Through the above technical solution, the rotating block facilitates the rotation of the central tube, thereby realizing the installation and disassembly of the current limiting buffer mechanism.

[0019] Preferably, the reset mechanism includes a support rod fixedly connected to the top of the top cover, the top end of the support rod is fixedly connected to the lower shell, the valve stem is slidably connected to the bottom of the lower shell, the top end of the valve stem is fixedly connected to the top plate, the top of the lower shell is fixedly connected to the upper shell, and a third reset spring is provided between the upper shell and the top plate.

[0020] Through the above technical solution, the third reset spring will automatically drive the valve stem and the conical valve core to reset according to the pressure of the material, thereby achieving the adjustment effect.

[0021] The present invention provides a regulating valve with a flow limiting buffer structure. It has the following beneficial effects: 1. This regulating valve with a flow limiting buffer structure can automatically clean impurities adhering to the outer surface of the conical valve core and the inner wall of the conical through hole during the use of the regulating valve through the first cleaning mechanism, the second cleaning mechanism and the driving mechanism, so as to avoid affecting the normal use of the regulating valve, thereby solving the problem that the existing regulating valve cannot self-clean the interior and affects normal use.

[0022] 2. This regulating valve with a flow limiting buffer structure can not only buffer the pressure when the material pressure increases, but also adjust and limit the flow of the material through the set flow limiting buffer mechanism, thereby achieving fine control of the fluid flow rate, effectively reducing the flow rate of the fluid, and avoiding impact and vibration caused by excessive flow rate.

[0023] 3. This regulating valve with a flow limiting and buffering structure can make the first cleaning mechanism, the second cleaning mechanism, the driving mechanism and the flow limiting and buffering mechanism all be disassembled for maintenance and replacement through the provision of a top cover, a bottom cover and a rotating block, which not only facilitates maintenance but also reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the valve body of the present invention; Figure 3 It is a partial structural schematic diagram of the present invention; Figure 4 It is a structural schematic diagram of the first cleaning mechanism, the second cleaning mechanism and the driving mechanism of the present invention; Figure 5 Schematic diagram of the structure of the current limiting buffer mechanism of the present invention; Figure 6 Schematic diagram of the internal structure of the current limiting buffer mechanism of the present invention; Figure 7 Schematic diagram of the internal structure of the reset mechanism of the present invention.

[0025] In the figure, 1, valve body; 2, top cover; 3, bottom cover; 4, valve stem; 5, tapered valve core; 6, partition; 7, tapered through hole; 8, first cleaning mechanism; 81, annular frame; 82, first spring telescopic rod; 83, first connecting block; 84, cross bar; 85, first scraper; 86, baffle; 87, first return spring; 9, second cleaning mechanism; 91, second spring telescopic rod; 92, second connecting block; 93, second scraper; 94, pressure rod; 10, driving mechanism; 101, bracket; 102, first rotating shaft; 103, Turbine; 104, second rotating shaft; 105, first bevel gear; 106, second bevel gear; 107, spur gear; 108, outer ring gear; 11, input pipe; 12, output end; 13, current limiting buffer mechanism; 131, support ring; 132, center pipe; 133, current limiting hole; 134, adjustment cover; 135, connecting plate; 136, second return spring; 137, rotating block; 14, return mechanism; 141, support rod; 142, lower shell; 143, top plate; 144, upper shell; 145, third return spring. DETAILED DESCRIPTION

[0026] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] Example 1: Figures 1 to 4 As shown, a regulating valve with a flow limiting buffer structure includes a valve body 1, the top and bottom of the valve body 1 are fixedly connected with a top cover 2 and a bottom cover 3 respectively, the top of the top cover 2 is slidably connected with a valve stem 4, the bottom end of the valve stem 4 is fixedly connected with a conical valve core 5, the inner wall of the valve body 1 is fixedly connected with a partition 6, the interior of the partition 6 is provided with a conical through hole 7 which matches the conical valve core 5, the upper surface of the partition 6 is provided with a first cleaning mechanism 8 which matches the conical valve core 5, the first cleaning mechanism 8 includes an annular frame 81 rotatably connected to the upper surface of the partition 6, the top of the annular frame 81 is symmetrically fixedly connected with two first spring telescopic rods 82, the top of the first spring telescopic rod 82 is fixedly connected with a first connecting block 83, the outer surface of the first connecting block 83 is slidably connected with a cross bar 84, and one end of the cross bar 84 is fixedly connected with a first scraper 85 which matches the outer surface of the conical valve core 5. One end of the crossbar 84 is fixedly connected to a baffle 86 , and a first return spring 87 is fixedly connected between the baffle 86 and the first connecting block 83 .

[0028] When the annular frame 81 rotates, it will drive the first scraper 85 to rotate, which can scrape the outer surface of the conical valve core 5 to prevent impurities from adhering to the surface of the conical valve core 5, thereby affecting the normal use of the regulating valve. The first spring telescopic rod 82 can make the first scraper 85 always fit the surface of the conical valve core 5 when the conical valve core 5 is raised or lowered, and will push the first scraper 85 to retract when the conical valve core 5 is closed. The first return spring 87 can automatically drive the first scraper 85 to reset when the conical valve core 5 rises to a certain height, so that the first scraper 85 can fit the surface of the conical valve.

[0029] A second cleaning mechanism 9 that cooperates with the conical through hole 7 is installed inside the conical through hole 7. The second cleaning mechanism 9 includes a second spring telescopic rod 91 arranged inside the conical through hole 7. The top of the second spring telescopic rod 91 is fixedly connected to a second connecting block 92. Both sides of the second connecting block 92 are rotatably connected to second scrapers 93 that cooperate with the inner wall of the conical through hole 7. A torsion spring is fixedly connected between the outer surface of the second scraper 93 and the second connecting block 92. The top of the second connecting block 92 is fixedly connected to a pressure rod 94 that cooperates with the bottom of the conical valve core 5.

[0030] The rotation of the second spring telescopic rod 91 can drive the second scraper 93 to rotate, so as to scrape off impurities adhering to the inner wall of the tapered through hole 7 to avoid affecting the sealing effect. When the tapered valve core 5 descends, the second connecting block 92 is squeezed by the pressure rod 94, and the second scraper 93 is retracted. When the tapered valve core 5 rises, the second scraper 93 can contact the inner wall of the tapered through hole 7 under the action of the second spring telescopic rod 91 and the torsion spring.

[0031] The top of the bottom cover 3 is equipped with a driving mechanism 10 that cooperates with the first cleaning mechanism 8 and the second cleaning mechanism 9. The driving mechanism 10 includes a bracket 101 fixedly connected to the top of the bottom cover 3. The interior of the bracket 101 is horizontally penetrated by a first rotating shaft 102 for rotational connection. One end of the first rotating shaft 102 is fixedly connected to a turbine 103. The bottom end of the second spring telescopic rod 91 penetrates the top of the bracket 101 and is rotationally connected to the bracket 101. The upper surface of the partition 6 is penetrated by a second rotating shaft 104 for rotational connection. The bottom ends of the second rotating shaft 104 and the second spring telescopic rod 91 are both fixedly connected to a first bevel gear 105. The outer surface of the first rotating shaft 102 is fixedly connected to two second bevel gears 106 that mesh with the first bevel gear 105. The top of the second rotating shaft 104 is fixedly connected to a spur gear 107, and the outer surface of the annular frame 81 is fixedly connected to an outer gear ring 108 that meshes with the spur gear 107.

[0032] When the material passes through the regulating valve, it drives the worm gear to rotate, and under the action of the second bevel gear 106 and the first bevel gear 105, the second spring telescopic rod 91 and the second rotating shaft 104 can be driven to rotate respectively. The rotation of the second rotating shaft 104 can drive the annular frame 81 to rotate through the spur gear 107 and the outer ring gear 108.

[0033] Example 2: Figure 1 、 Figure 5 and Figure 6 As shown, the valve body 1 has an input pipe 11 and an output end 12 fixedly connected to both sides of its outer surface. A flow-limiting buffer mechanism 13 is installed inside the input pipe 11. The flow-limiting buffer mechanism 13 includes a support ring 131 threadedly connected to the interior of the input pipe 11. A center pipe 132 is fixedly connected to one side of the support ring 131. The outer surface of the center pipe 132 is provided with multiple flow-limiting holes 133. An adjustment cover 134 is slidingly sleeved on the outer surface of the center pipe 132. One end of the adjustment cover 134 is fixedly connected to a connecting plate 135. A second return spring 136 is fixedly connected between the connecting plate 135 and the support ring 131. A rotating block 137 is fixedly connected to one side of the center pipe 132.

[0034] When the pressure of the material entering is too high, the adjustment cover 134 will be squeezed and buffered under the action of the second return spring 136, so that the squeeze cover will block the flow limiting hole 133, reducing the area through which the material flows, thereby achieving fine control of the fluid flow rate, effectively reducing the flow rate of the fluid, and avoiding the impact and vibration caused by excessive flow rate. The rotating block 137 facilitates the rotation of the central tube 132, thereby realizing the installation and disassembly of the flow limiting buffer mechanism 13.

[0035] Example 3: Figure 1 and Figure 7 As shown, a reset mechanism 14 cooperating with the valve stem 4 is installed on the top of the top cover 2. The reset mechanism 14 includes a support rod 141 fixedly connected to the top of the top cover 2, the top of the support rod 141 is fixedly connected to the lower shell 142, the valve stem 4 is slidably connected to the bottom of the lower shell 142, the top of the valve stem 4 is fixedly connected to the top plate 143, the top of the lower shell 142 is fixedly connected to the upper shell 144, and a third reset spring 145 is provided between the upper shell 144 and the top plate 143.

[0036] The third reset spring 145 will automatically drive the valve stem 4 and the conical valve core 5 to reset according to the pressure of the material, thereby achieving the regulation effect.

[0037] Working principle: The third reset spring 145 will automatically drive the valve stem 4 and the conical valve core 5 to reset according to the pressure of the material, thereby achieving the adjustment effect.

[0038] When the material passes through the regulating valve, it drives the worm gear to rotate, and under the action of the second bevel gear 106 and the first bevel gear 105, the second spring telescopic rod 91 and the second rotating shaft 104 can be driven to rotate respectively. The rotation of the second rotating shaft 104 can drive the annular frame 81 to rotate through the spur gear 107 and the outer ring gear 108.

[0039] When the annular frame 81 rotates, it will drive the first scraper 85 to rotate, which can scrape the outer surface of the conical valve core 5 to prevent impurities from adhering to the surface of the conical valve core 5, thereby affecting the normal use of the regulating valve. The first spring telescopic rod 82 can make the first scraper 85 always fit the surface of the conical valve core 5 when the conical valve core 5 is raised or lowered, and will push the first scraper 85 to retract when the conical valve core 5 is closed. The first return spring 87 can automatically drive the first scraper 85 to reset when the conical valve core 5 rises to a certain height, so that the first scraper 85 can fit the surface of the conical valve.

[0040] The rotation of the second spring telescopic rod 91 can drive the second scraper 93 to rotate, so as to scrape off impurities adhering to the inner wall of the tapered through hole 7 to avoid affecting the sealing effect. When the tapered valve core 5 descends, the second connecting block 92 is squeezed by the pressure rod 94, and the second scraper 93 is retracted. When the tapered valve core 5 rises, the second scraper 93 can contact the inner wall of the tapered through hole 7 under the action of the second spring telescopic rod 91 and the torsion spring.

[0041] When the pressure of the material entering is too high, the adjustment cover 134 will be squeezed and buffered under the action of the second return spring 136, so that the squeeze cover will block the flow limiting hole 133, reducing the area through which the material flows, thereby achieving fine control of the fluid flow rate, effectively reducing the flow rate of the fluid, and avoiding the impact and vibration caused by excessive flow rate. The rotating block 137 facilitates the rotation of the central tube 132, thereby realizing the installation and disassembly of the flow limiting buffer mechanism 13.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A regulating valve with a flow limiting buffer structure, comprising a valve body (1), characterized in that: The top and bottom of the valve body (1) are fixedly connected to a top cover (2) and a bottom cover (3), respectively. The top of the top cover (2) is slidably connected to a valve stem (4). The bottom end of the valve stem (4) is fixedly connected to a conical valve core (5). The inner wall of the valve body (1) is fixedly connected to a partition (6). The interior of the partition (6) is provided with a conical through hole (7) that matches the conical valve core (5). The upper surface of the partition (6) is provided with a first cleaning mechanism (8) that matches the conical valve core (5). A second cleaning mechanism (9) cooperating with the tapered through hole (7) is installed inside the through hole (7); a driving mechanism (10) cooperating with the first cleaning mechanism (8) and the second cleaning mechanism (9) is installed on the top of the bottom cover (3); an input pipe (11) and an output end (12) are fixedly connected to both sides of the outer surface of the valve body (1); a flow limiting buffer mechanism (13) is installed inside the input pipe (11); and a reset mechanism (14) cooperating with the valve stem (4) is installed on the top of the top cover (2); The first cleaning mechanism (8) includes an annular frame (81) rotatably connected to the upper surface of the partition (6), two first spring telescopic rods (82) are symmetrically fixedly connected to the top of the annular frame (81), the top of the first spring telescopic rod (82) is fixedly connected to a first connecting block (83), the outer surface of the first connecting block (83) is slidably connected to a cross bar (84), and one end of the cross bar (84) is fixedly connected to a first scraper (85) that matches the outer surface of the conical valve core (5).

2. The regulating valve with a flow limiting buffer structure according to claim 1, characterized in that: One end of the crossbar (84) is fixedly connected to a baffle (86), and a first return spring (87) is fixedly connected between the baffle (86) and the first connecting block (83).

3. The regulating valve with a flow limiting buffer structure according to claim 1, characterized in that: The second cleaning mechanism (9) includes a second spring telescopic rod (91) arranged inside the conical through hole (7), the top end of the second spring telescopic rod (91) is fixedly connected to a second connecting block (92), both sides of the second connecting block (92) are rotatably connected to second scrapers (93) that match the inner wall of the conical through hole (7), a torsion spring is fixedly connected between the outer surface of the second scraper (93) and the second connecting block (92), and the top of the second connecting block (92) is fixedly connected to a pressure rod (94) that matches the bottom of the conical valve core (5).

4. The regulating valve with a flow limiting buffer structure according to claim 3, characterized in that: The driving mechanism (10) includes a bracket (101) fixedly connected to the top of the bottom cover (3), a first rotating shaft (102) is horizontally passed through the interior of the bracket (101) and is rotatably connected, one end of the first rotating shaft (102) is fixedly connected to a turbine (103), the bottom end of the second spring telescopic rod (91) passes through the top of the bracket (101) and is rotatably connected to the bracket (101), the upper surface of the partition (6) passes through a second rotating shaft (104) and is rotatably connected, the bottom ends of the second rotating shaft (104) and the second spring telescopic rod (91) are both fixedly connected to a first bevel gear (105), and the outer surface of the first rotating shaft (102) is fixedly connected to two second bevel gears (106) meshing with the first bevel gear (105).

5. The regulating valve with a flow limiting buffer structure according to claim 4, characterized in that: The top end of the second rotating shaft (104) is fixedly connected to a spur gear (107), and the outer surface of the annular frame (81) is fixedly connected to an outer gear ring (108) meshing with the spur gear (107).

6. The regulating valve with a flow limiting buffer structure according to claim 1, characterized in that: The flow-limiting buffer mechanism (13) comprises a support ring (131) threadedly connected to the interior of the input pipe (11); a central pipe (132) is fixedly connected to one side of the support ring (131); a plurality of flow-limiting holes (133) are provided on the outer surface of the central pipe (132); an adjustment cover (134) is slidably sleeved on the outer surface of the central pipe (132); a connecting plate (135) is fixedly connected to one end of the adjusting cover (134); and a second return spring (136) is fixedly connected between the connecting plate (135) and the support ring (131).

7. The regulating valve with a flow limiting buffer structure according to claim 6, characterized in that: A rotating block (137) is fixedly connected to one side of the central tube (132).

8. The regulating valve with a flow limiting buffer structure according to claim 1, characterized in that: The reset mechanism (14) includes a support rod (141) fixedly connected to the top of the top cover (2), the top of the support rod (141) is fixedly connected to the lower shell (142), the valve stem (4) is slidably connected to the bottom of the lower shell (142), the top of the valve stem (4) is fixedly connected to the top plate (143), the top of the lower shell (142) is fixedly connected to the upper shell (144), and a third reset spring (145) is provided between the upper shell (144) and the top plate (143).

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