A flow-adjustable hydraulically controlled throttle valve and kit

Abstract

The present invention belongs to the technical field of hydraulic equipment, and particularly relates to a flow-adjustable hydraulically controlled throttle valve and its kit. In the valve core assembly of the throttle valve, a throttle plug is installed in the mounting groove at the rear end of the push rod. The sidewalls of the mounting groove are provided with a circle of first radial through holes, and the sidewalls of the liquid outlet groove at the rear end of the throttle plug are provided with a circle of second radial through holes. The circle of first through holes and the circle of second through holes are screwed together to form a damping hole. The push rod can move back and forth in the axial direction, so that the damping hole can be switched between alignment and offset with the second liquid inlet. The disassembly device in the kit is connected to the push rod at the mounting end, and the operating end is used to pull the push rod out of the valve seat. Thus, the damping hole formed in the throttle valve can be switched between alignment and offset with the second liquid inlet to achieve precise flow control. In addition, the disassembly device is screwed into the push rod and then pulled out of the valve seat, effectively protecting the throttle plug and making maintenance of the throttle valve more convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic equipment, and in particular relates to a flow-adjustable hydraulically controlled throttle valve and a kit. Background Art

[0002] With the accelerated advancement of intelligent coal mines and the rapid development of hydraulic support control technology, the requirements for hydraulic control components are becoming increasingly stringent, placing further demands on the hydraulic control valves used in these equipment. Throttle valves play a crucial role in hydraulic systems, regulating flow and speed, stabilizing system pressure, and ensuring the safe operation of system equipment. Furthermore, the use of throttle valves can improve system energy efficiency and operational efficiency, reducing energy consumption and production costs.

[0003] However, the existing throttle valve cannot accurately control the flow rate, and the throttle valve has a high damage rate in a high-pressure environment above 30MPa. However, it is not easy to disassemble the valve core assembly for maintenance, which not only affects work efficiency but also easily causes safety hazards. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a flow-adjustable hydraulically controlled throttle valve and a kit, thereby solving the technical problems of being unable to accurately control the flow and being difficult to maintain.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] On the one hand, an embodiment of the present invention provides a flow-adjustable hydraulically controlled throttle valve, comprising a valve body and a valve core assembly, the valve body being provided with a first liquid inlet and a second liquid inlet, the axis of the second liquid inlet being perpendicular to the axis of the first liquid inlet; the valve core assembly enters the valve body from the first liquid inlet and is partially disposed within the valve body, the valve core assembly being coaxially disposed with the first liquid inlet, the valve core assembly comprising a push rod, the push rod being disposed inside the valve core assembly, the tail of the push rod being provided with an axial mounting groove, the side wall of the mounting groove being provided with a circle of radial first through holes; a throttling plug is installed in the mounting groove, the tail of the throttling plug being provided with an axial liquid outlet groove, the side wall of the liquid outlet groove being provided with a circle of radial second through holes, a circle of first through holes and a circle of second through holes being screwed together to form a damping hole; the push rod being able to move back and forth in the axial direction so that the damping hole can be switched between a position aligned with or staggered with the second liquid inlet.

[0009] Furthermore, a positioning pin is radially embedded in the side wall of the installation groove. The positioning pin is located at the head of the throttle plug when the throttle plug is installed in the installation groove. The positioning pin can squeeze the head of the throttle plug to position the throttle plug.

[0010] Furthermore, a pulling hole is provided at the center of the end surface of the head of the push rod.

[0011] Furthermore, the valve core assembly also includes a valve seat, which is coaxially sleeved on the outside of the push rod; the valve seat is provided with an axial through hole and a radial through hole, the axial through hole and the radial through hole intersect and both pass through the valve seat, the axial through hole includes a third through hole, a fourth through hole and a fifth through hole connected, and the diameters of the third through hole, the fourth through hole and the fifth through hole decrease in sequence; the head diameter of the push rod is larger than the diameter of the tail of the push rod, the head diameter of the push rod is adapted to the diameter of the third through hole, the tail diameter of the push rod is adapted to the diameter of the fourth through hole, the end face of the head of the push rod and the end face of the valve seat located at the third through hole are in the same plane as the first position of the push rod, and the tail of the push rod is stuck at the connection between the fourth through hole and the fifth through hole as the second position, and the range of motion of the push rod is the area between the first position and the second position; the length of the third through hole is greater than or equal to the distance between the first position and the second position.

[0012] Furthermore, the edge of the tail end face of the push rod is set to a conical surface. When the push rod is located at the second position, the edge of the connection between the fourth through hole and the fifth through hole contacts the conical surface to form a hard seal.

[0013] Furthermore, the valve seat includes a first cylinder, a second cylinder and a third cylinder that are connected, the diameter of the first cylinder is smaller than the diameter of the second cylinder, and the second cylinder and the third cylinder are in contact with the inner wall of the valve body; the valve body is also provided with a liquid outlet, which is coaxial with the first liquid inlet, and the second liquid inlet and the liquid outlet are connected to the liquid outlet through the radial through hole and the fifth through hole in turn.

[0014] Furthermore, the valve core assembly also includes a valve housing, which is coaxially arranged with the valve seat, and the valve housing includes a fourth cylinder, which is adapted to be embedded in the valve body with the first liquid inlet; a fixing groove is provided at the tail of the fourth cylinder, and the first cylinder is fixed in the fixing groove; a liquid supply hole connected to the fixing groove is provided at the axis of the valve housing, and the liquid supply hole is connected to the third through hole.

[0015] Furthermore, the valve housing also includes a fifth cylinder connected to the fourth cylinder, the fifth cylinder is located on the head side of the fourth cylinder, and the side of the fifth cylinder away from the fourth cylinder is connected to the sixth cylinder, and the diameter of the sixth cylinder is smaller than the diameter of the fifth cylinder; an adapter is provided on the outer side of the sixth cylinder, and a connecting hole is opened in the adapter, which is connected to the liquid supply hole.

[0016] Furthermore, sealing grooves are provided on the outer wall of the head of the push rod, the outer wall of the fourth cylinder, the inner wall of the fourth through hole, the outer wall of the second cylinder and the outer wall of the third cylinder, and an O-ring and at least one retaining ring are provided in the sealing grooves.

[0017] On the other hand, an embodiment of the present invention also provides a flow-adjustable hydraulically controlled throttle valve kit, including a flow-adjustable hydraulically controlled throttle valve and a disassembly device, the disassembly device including a connected operating end and an installation end, the installation end matches the pulling hole, the disassembly device is connected to the push rod through the installation end and the pulling hole, and the operating end is used to pull the push rod out of the valve seat.

[0018] (3) Beneficial effects

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a flow-adjustable hydraulically controlled throttle valve and kit. Since a first liquid inlet and a second liquid inlet are provided on the valve body, a valve core assembly is arranged in the valve body, and a throttling plug is provided in the push rod inside the valve core assembly. By screwing the first through hole of the push rod and the second through hole of the throttling plug together, the damping hole formed is switched between the aligned or staggered positions of the second liquid inlet, so that the high-pressure liquid in the second liquid inlet can flow out directly or only flow out slowly through the damping hole to achieve precise control of the flow rate.

[0021] In addition, the present invention uses the valve core assembly as an integral connector, which is inserted into the valve body. When maintenance is required, the valve core assembly can be disassembled as a whole. When adjusting the throttle plug, the disassembly device is screwed into the push rod and the push rod is pulled out of the valve seat, which effectively protects the throttle plug and makes the maintenance and adjustment of the throttle valve more convenient. Compared with the existing technology, it realizes the throttling effect by precisely controlling the flow of the pipeline by adjusting the throttle plug through the pressure condition of the controlled hydraulic pipeline. The valve core assembly in the present invention is an integral structure with a simple structure, easy assembly and disassembly, and convenient for underground replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the flow-adjustable hydraulically controlled throttle valve when the push rod is in the first position;

[0023] Figure 2 It is a structural schematic diagram of the flow-adjustable hydraulically controlled throttle valve when the push rod is in the second position;

[0024] Figure 3 It is a structural diagram of the valve body;

[0025] Figure 4 Schematic diagram of the structure of the valve housing;

[0026] Figure 5 Schematic diagram of the structure of the valve seat;

[0027] Figure 6 Schematic diagram of the structure of the ejector rod;

[0028] Figure 7 It is a structural diagram of the throttling plug;

[0029] Figure 8 It is a structural diagram of the connection between the disassembly device and the ejector rod.

[0030] [Description of Reference Numerals]

[0031] 1: valve body; 11: first liquid inlet; 12: second liquid inlet; 13: liquid outlet;

[0032] 2: Valve core assembly; 21: Push rod; 211: Mounting groove; 212: First through hole; 213: Positioning pin; 214: Pull hole; 215: Conical surface; 22: Throttle plug; 221: Liquid outlet groove; 222: Second through hole; 23: Valve seat; 231: Radial through hole; 232: Third through hole; 233: Fourth through hole; 234: Fifth through hole; 235: First cylinder; 236: Second cylinder; 237: Third cylinder; 24: Valve housing; 241: Fourth cylinder; 242: Fixing groove; 243: Liquid supply hole; 244:

[0033] Fifth cylinder; 245: sixth cylinder;

[0034] 3: adapter; 31: connecting hole;

[0035] 4: O-ring; 5: retaining ring;

[0036] 6: Disassembly device; 61: Operation end; 62: Installation end. DETAILED DESCRIPTION

[0037] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0038] like Figure 1-8 As shown, the present invention provides a flow-adjustable hydraulic throttle valve, such as Figure 1 、 Figure 2 As shown, it includes a valve body 1 and a valve core assembly 2. Figure 1-3 As shown, the valve body 1 is provided with a first liquid inlet 11, a second liquid inlet 12 and a liquid outlet 13. The axis of the second liquid inlet 12 is perpendicular to the axis of the first liquid inlet 11, and the liquid outlet 13 is coaxial with the first liquid inlet 11. Figure 1 、 Figure 2 As shown, the valve core assembly 2 enters the valve body 1 from the first liquid inlet 11 and is partially disposed in the valve body 1 , and the valve core assembly 2 is coaxially disposed with the first liquid inlet 11 .

[0039] like Figure 1-8 As shown, the valve core assembly 2 is an integral structure, including a push rod 21, a throttle plug 22, a valve seat 23 and a valve housing 24. Figure 1 、 Figure 2 、 Figure 6 、 Figure 8As shown, the tail of the push rod 21 is provided with an axial mounting groove 211, and the side wall of the mounting groove 211 is provided with a circle of radial first through holes 212, and the circle of first through holes 212 is evenly distributed on the circumference. Figure 1 、 Figure 2 、 Figure 8 As shown, a throttle plug 22 is installed in the installation groove 211. In this embodiment, an internal thread is provided in the installation groove 211, and an external thread is provided on the throttle plug 22. The push rod 21 is threadedly connected to the installation groove 211 and the throttle plug 22 through the throttle plug 22. Figure 1 、 Figure 2 、 Figure 7 、 Figure 8 As shown, the tail of the throttle plug 22 is provided with an axial liquid outlet groove 221, and the side wall of the liquid outlet groove 221 is provided with a circle of radial second through holes 222, and the circle of second through holes 222 is evenly distributed on the circumference, as shown in FIG. Figure 1 、 Figure 2 、 Figure 8 As shown, a circle of first through holes 212 and a circle of second through holes 222 are screwed together to form a damping hole to achieve precise flow control of the throttle valve. The push rod 21 can move back and forth in the axial direction so that the damping hole can be switched between aligned and offset positions with the second liquid inlet 12.

[0040] like Figure 1 、 Figure 2 、 Figure 8 As shown, the valve seat 23 is coaxially sleeved on the outside of the push rod 21. Specifically, as Figure 5 As shown, the valve seat 23 is provided with an axial through hole and a radial through hole 231, which intersect and pass through the valve seat 23. The axial through hole includes a third through hole 232, a fourth through hole 233 and a fifth through hole 234 which are connected. The diameters of the third through hole 232, the fourth through hole 233 and the fifth through hole 234 become smaller in sequence.

[0041] like Figure 6 As shown, the diameter of the head of the push rod 21 is larger than the diameter of the tail of the push rod 21. Figure 1 、 Figure 2 、 Figure 8As shown, the diameter of the head of the push rod 21 matches the diameter of the third through hole 232, and the diameter of the tail of the push rod 21 matches the diameter of the fourth through hole 233. When the end surface of the head of the push rod 21 and the end surface of the valve seat 23 located at the third through hole 232 are in the same plane, the push rod 21 is in the first position. At this time, the second liquid inlet 12 is connected to the liquid outlet 13 through the radial through hole 231 and the fifth through hole 234. When the tail of the push rod 21 is stuck at the connection between the fourth through hole 233 and the fifth through hole 234, the push rod 21 is in the second position. At this time, the second liquid inlet 12 is connected to the liquid outlet 13 through the damping hole and the fifth through hole 234. The range of motion of the push rod 21 is the area between the first and second positions.

[0042] In order not to affect the movement range of the push rod 21, the length of the third through hole 232 is greater than or equal to the distance between the first position and the second position.

[0043] Preferably, if Figure 1 、 Figure 2 、 Figure 6 、 Figure 8 As shown, the edge of the rear end face of the push rod 21 is configured as a tapered surface 215. When the push rod 21 is in the second position, the edge of the junction between the fourth through hole 233 and the fifth through hole 234 contacts the tapered surface 215 to form a hard seal. The use of a hard seal can extend the service life and enhance the anti-contamination ability.

[0044] In order to keep the size of the adjusted damping hole unchanged, a positioning pin 213 is radially embedded in the side wall of the installation groove 211. The positioning pin 213 is located at the head of the throttle plug 22 when the throttle plug 22 is installed in the installation groove 211. The positioning pin 213 can squeeze the head of the throttle plug 22 to position the throttle plug 22.

[0045] like Figure 5 As shown, the valve seat 23 includes a first cylinder 235 , a second cylinder 236 and a third cylinder 237 connected to each other. The diameter of the first cylinder 235 is smaller than that of the second cylinder 236 . The second cylinder 236 and the third cylinder 237 fit the inner wall of the valve body 1 .

[0046] like Figure 4 As shown, the valve housing 24 includes a fourth cylinder 241, a fifth cylinder 244 and a sixth cylinder 245 that are connected. The fifth cylinder 244 is located on the head side of the fourth cylinder 241, and the sixth cylinder 245 is connected to the side of the fifth cylinder 244 away from the fourth cylinder 241. The diameter of the sixth cylinder 245 is smaller than the diameter of the fifth cylinder 244.

[0047] like Figure 1-4As shown, the fourth cylinder 241 and the first liquid inlet 11 are adapted to be embedded in the valve body 1. In this embodiment, the outer side of the fourth cylinder 241 is provided with an external thread, and the first liquid inlet 11 is provided with an internal thread. The valve body 1 and the valve core assembly 2 are connected by the fourth cylinder 241 and the first liquid inlet 11 through the threaded connection.

[0048] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 As shown, the valve seat 23 is coaxially arranged with the valve housing 24. Specifically, a fixing groove 242 is formed at the tail of the fourth cylindrical body 241, and the first cylindrical body 235 is fixed in the fixing groove 242. In this embodiment, the outer side of the first cylindrical body 235 is provided with an external thread, and the inner side of the fixing groove 242 is provided with an external thread. The valve seat 23 and the valve housing 24 are connected by the threaded connection between the first cylindrical body 235 and the fixing groove 242.

[0049] The valve housing 24 is provided with a liquid supply hole 243 connected to the fixing groove 242 at its axis, and the liquid supply hole 243 is communicated with the third through hole 232. Figure 1 、 Figure 2 As shown, the outer side of the sixth cylinder 245 is provided with an adapter 3, which is used to connect to a pipeline for providing pressure liquid. A connecting hole 31 is formed in the adapter 3, and the connecting hole 31 is connected to the liquid supply hole 243.

[0050] In addition, sealing grooves are provided on the outer wall of the head of the push rod 21, the outer wall of the fourth cylinder 241, the inner wall of the fourth through hole 233, the outer wall of the second cylinder 236 and the outer wall of the third cylinder 237. An O-ring 4 and at least one retaining ring 5 are provided in the sealing groove, and the retaining ring 5 is used to protect the O-ring 4.

[0051] like Figure 8 As shown, the present invention also provides a flow-adjustable hydraulically controlled throttle valve kit, comprising a flow-adjustable hydraulically controlled throttle valve and a disassembly device 6. The disassembly device 6 comprises a connected operating end 61 and a mounting end 62. A pulling hole 214 is provided at the center of the end surface of the head of the ejector pin 21. The mounting end 62 matches the pulling hole 214. The disassembly device 6 is mounted and connected to the ejector pin 21 through the mounting end 62 and the pulling hole 214. When disassembling the valve core assembly 2, the valve housing 24 is first unscrewed from the valve body 1, and then the valve housing 24 is separated from the valve seat 23. Subsequently, the mounting end 62 of the disassembly device 6 is installed in the pulling hole 214, and the operating end 61 pulls the ejector pin 21 out of the valve seat 23. This disassembly method effectively protects the ejector pin 21 and the throttle plug 22, making the maintenance of the throttle valve more convenient.

[0052] Working Principle: When the liquid supply hole 243 is not supplying liquid, the high-pressure liquid in the second liquid inlet 12 flows directly to the liquid outlet 13 through the radial through hole 231 and the fifth through hole 234. When the liquid supply hole 243 is supplying liquid, the push rod 21 contacts and seals with the valve seat 23 under the action of the pressure liquid. The damping hole formed by the push rod 21 and the throttle plug 22 allows the high-pressure liquid in the second liquid inlet 12 to flow slowly to the liquid outlet 13 only through the damping hole, thereby reducing the flow rate in the pipeline of the hydraulic support.

[0053] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0054] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0056] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0057] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flow-adjustable hydraulic throttle valve, comprising a valve body (1) and a valve core assembly (2), characterized in that: The valve body (1) is provided with a first liquid inlet (11) and a second liquid inlet (12), wherein the axis of the second liquid inlet (12) is perpendicular to the axis of the first liquid inlet (11); The valve core assembly (2) enters the valve body (1) from the first liquid inlet (11) and is partially arranged in the valve body (1). The valve core assembly (2) is coaxially arranged with the first liquid inlet (11). The valve core assembly (2) includes a push rod (21). The push rod (21) is arranged inside the valve core assembly (2). An axial mounting groove (211) is provided at the tail of the push rod (21). A circle of radial first through holes (212) is provided on the side wall of the mounting groove (211). A throttling plug (22) is installed in the installation groove (211), an axial liquid outlet groove (221) is provided at the tail of the throttling plug (22), a circle of radial second through holes (222) is provided on the side wall of the liquid outlet groove (221), and a circle of the first through holes (212) and a circle of the second through holes (222) are screwed together to form a damping hole; The push rod (21) can move forward and backward in the axial direction so that the damping hole can be switched between positions aligned with or offset from the second liquid inlet (12).

2. The flow-adjustable hydraulic throttle valve according to claim 1, characterized in that: A positioning pin (213) is radially embedded in the side wall of the installation groove (211). The positioning pin (213) is located at the head of the throttle plug (22) when the throttle plug (22) is installed in the installation groove (211). The positioning pin (213) can squeeze the head of the throttle plug (22) to position the throttle plug (22).

3. The flow-adjustable hydraulic throttle valve according to claim 1, characterized in that: A pulling hole (214) is provided at the center of the end surface of the head of the push rod (21).

4. The flow-adjustable hydraulically controlled throttle valve according to claim 3, characterized in that: The valve core assembly (2) further comprises a valve seat (23), wherein the valve seat (23) is coaxially sleeved on the outside of the push rod (21); The valve seat (23) is provided with an axial through hole and a radial through hole (231), the axial through hole and the radial through hole (231) intersect and both pass through the valve seat (23), the axial through hole includes a third through hole (232), a fourth through hole (233) and a fifth through hole (234) connected to each other, and the diameters of the third through hole (232), the fourth through hole (233) and the fifth through hole (234) are successively smaller; The diameter of the head of the push rod (21) is larger than the diameter of the tail of the push rod (21), the diameter of the head of the push rod (21) is adapted to the diameter of the third through hole (232), the diameter of the tail of the push rod (21) is adapted to the diameter of the fourth through hole (233), the end face of the head of the push rod (21) and the end face of the valve seat (23) located at the third through hole (232) are in the same plane as each other, which is the first position of the push rod (21), the tail of the push rod (21) is stuck at the connection between the fourth through hole (233) and the fifth through hole (234), which is the second position of the push rod (21), and the range of motion of the push rod (21) is the area between the first position and the second position; The length of the third through hole (232) is greater than or equal to the distance between the first position and the second position.

5. The flow-adjustable hydraulically controlled throttle valve according to claim 4, characterized in that: The edge of the tail end face of the push rod (21) is set as a conical surface (215). When the push rod (21) is located at the second position, the edge of the connection between the fourth through hole (233) and the fifth through hole (234) contacts the conical surface (215) to form a hard seal.

6. The flow-adjustable hydraulically controlled throttle valve according to claim 4, characterized in that: The valve seat (23) comprises a first cylinder (235), a second cylinder (236), and a third cylinder (237) connected to each other, the diameter of the first cylinder (235) being smaller than the diameter of the second cylinder (236), and the second cylinder (236) and the third cylinder (237) being in contact with the inner wall of the valve body (1); The valve body (1) is further provided with a liquid outlet (13), the liquid outlet (13) being coaxial with the first liquid inlet (11), and the second liquid inlet (12) and the liquid outlet (13) being connected to the liquid outlet (13) in sequence through the radial through hole (231) and the fifth through hole (234).

7. The flow-adjustable hydraulically controlled throttle valve according to claim 6, characterized in that: The valve core assembly (2) further comprises a valve housing (24), the valve housing (24) being coaxially arranged with the valve seat (23), the valve housing (24) comprising a fourth cylinder (241), the fourth cylinder (241) being adapted to fit the first liquid inlet (11) and embedded in the valve body (1); A fixing groove (242) is provided at the tail of the fourth cylinder (241), and the first cylinder (235) is fixed in the fixing groove (242); The valve housing (24) is provided with a liquid supply hole (243) connected to the fixing groove (242) at its axis, and the liquid supply hole (243) is communicated with the third through hole (232).

8. The flow-adjustable hydraulically controlled throttle valve according to claim 7, characterized in that: The valve housing (24) further comprises a fifth cylinder (244) connected to the fourth cylinder (241), the fifth cylinder (244) being located on a head side of the fourth cylinder (241), a sixth cylinder (245) being connected to a side of the fifth cylinder (244) away from the fourth cylinder (241), and a diameter of the sixth cylinder (245) being smaller than a diameter of the fifth cylinder (244); An adapter (3) is sleeved on the outer side of the sixth cylinder (245), a connecting hole (31) is provided in the adapter (3), and the connecting hole (31) is communicated with the liquid supply hole (243).

9. The flow-adjustable hydraulically controlled throttle valve according to claim 7, characterized in that: The outer wall of the head of the push rod (21), the outer wall of the fourth cylinder (241), the inner wall of the fourth through hole (233), the outer wall of the second cylinder (236) and the outer wall of the third cylinder (237) are all provided with sealing grooves, and an O-ring (4) and at least one retaining ring (5) are provided in the sealing grooves.

10. A flow-adjustable hydraulic throttle valve kit, characterized in that: It comprises a flow-adjustable hydraulically controlled throttle valve and a disassembly device (6) according to any one of claims 4 to 9, wherein the disassembly device (6) comprises a connected operating end (61) and a mounting end (62), wherein the mounting end (62) matches the pulling hole (214), and the disassembly device (6) is mounted and connected to the push rod (21) through the mounting end (62) and the pulling hole (214), and the operating end (61) is used to pull the push rod (21) out of the valve seat (23).

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