Black water conditioning valve

Abstract

The application discloses a black water regulating valve, and relates to the technical field of regulating valves, which comprises a valve body, a valve seat, a valve rod, a packing assembly, a packing pressing sleeve, a packing pressing plate and an executing device; the valve body is internally provided with the valve seat at the bottom end; the valve rod is slidingly arranged in the valve body; one end of the valve rod, which is away from the valve seat, is connected with the executing device; and the packing pressing plate is used for arranging the packing assembly between the valve rod and the inner wall of the valve body through the packing pressing sleeve.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to a black water regulating valve. Background Technology

[0002] Coal chemical black water regulating valves are mainly installed in the gasification and slag water treatment sections of gasifiers. Their main function is to control the liquid level in the gasifier and carbon washing tower, and to perform multi-stage flash evaporation on the discharged black water to facilitate the recovery of ash water and heat. These valves are characterized by high pressure differential, strong cavitation, strong erosion, strong corrosion, and easy adhesion.

[0003] Existing black water control valves have many problems during long-term use. The flow channel is prone to media accumulation, and the valve stem and valve core are prone to media adhesion. After long-term use, this will cause difficulties in opening and closing the valve, and make maintenance and disassembly inconvenient. Existing black water control valves with purging structures will have poor valve stem guidance after purging, resulting in increased valve stem vibration and flow field cavitation, which will increase the noise of the entire black water control valve. Existing black water control valves have components such as stuffing boxes, mating flanges, and Venturi extension tubes, which are complex in structure and increase the external leakage channels of the media, thus increasing the risk of media leakage.

[0004] Therefore, a black water regulating valve that can adapt to the above operating conditions is needed to solve the above technical problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a black water regulating valve, comprising: a valve body, a valve seat, a valve stem, a packing assembly, a packing sleeve, a packing pressure plate, and an actuator;

[0006] The valve body has a valve seat at its bottom, the valve stem is slidably disposed within the valve body, the end of the valve stem away from the valve seat is connected to the actuator, and the packing plate places the packing assembly between the valve stem and the valve body through the packing sleeve.

[0007] The valve stem includes: a valve stem body, a smooth rod section, an inverted conical section, a first guide surface, a valve core body, a second guide surface, and a connecting part;

[0008] The valve stem body includes the smooth rod section and the inverted cone section. One end of the smooth rod section is connected to the actuator, and the other end is connected to the inverted cone section. The outer wall of the inverted cone section is the first flow guide surface. The large end of the valve core body is connected to the end of the inverted cone section away from the smooth rod section through the connecting part. The outer wall of the valve core body is the second flow guide surface with an inverted cone shape.

[0009] The diameter of the large end of the valve core is smaller than the diameter of the smooth rod section.

[0010] Furthermore, as a preferred embodiment, the valve body includes: a flow channel, a first tip, a second tip, an elongated straight hole, and a buffer surface;

[0011] The valve body has a flow channel and a long straight hole inside. The inlet and outlet of the flow channel are connected to an external mechanism. The middle part of the flow channel is connected to the long straight hole, and the inner wall of the connection is provided with a first tip and a second tip. The inner wall of the long straight hole located at the first tip is a buffer surface that is arranged opposite to the direction of medium entry in the flow channel.

[0012] The valve stem is slidably connected within the long straight hole.

[0013] Furthermore, preferably, the packing assembly includes: a spacer ring, a packing body, a packing gasket, and a screw plug;

[0014] The spacer ring has a packing body at both ends, and a packing gasket is provided on the side of the packing body away from the spacer ring. The screw plug passes through the valve body and is connected to the spacer ring.

[0015] Furthermore, as a preferred embodiment, the actuator includes: a drive element, a stable base, a bracket, and a connecting frame;

[0016] The driving component is mounted on the stabilizing base, and the output end of the driving component is connected to the end of the optical rod segment away from the inverted cone segment. The stabilizing base is connected to the valve body through the bracket, and the connecting frame is slidably mounted on the bracket. The end of the connecting frame away from the bracket is fixedly connected to the outer wall of the optical rod segment.

[0017] Furthermore, as a preferred embodiment, the packing plate is connected to the valve body by a first bolt, the end of the bracket away from the stabilizing seat is connected to the valve body by a second bolt, and the valve seat is connected to the valve body by a third bolt.

[0018] Furthermore, as a preferred embodiment, both the first tip and the second tip are provided with a protective layer.

[0019] Furthermore, preferably, the outer wall of the connecting part matches the shape of the sealing surface of the inner wall of the valve seat.

[0020] Furthermore, as a preferred embodiment, a buffer layer is provided on the inner wall of the valve seat at the location where it mates with the connecting part.

[0021] Compared with the prior art, this utility model provides a black water regulating valve, which has the following beneficial effects:

[0022] Advantage 1: The integrated valve stem structure in this application adopts an integrated molding design without split parts or threaded connections. Combined with a smooth inverted conical transition without a stepped structure, it can completely eliminate dead corners for material accumulation, avoid the accumulation and scaling of sticky media, ensure smooth flow, prevent the opening and closing of the black water regulating valve from getting stuck, avoid the hidden danger of thread corrosion and jamming, simplify the operation and maintenance process, and improve the overall rigidity, coaxiality and service life of the black water regulating valve.

[0023] Advantage 2: The dual-tip scraping structure combined with the dual-guide surface in this application can automatically peel off the sticky medium adhering to the outer wall of the smooth rod section. With the directional guide flow, the sticky medium is discharged with the mainstream, leaving no residue or sludge throughout the process. No manual or auxiliary cleaning is required, which effectively reduces the valve stem displacement resistance, ensures the black water regulating valve opens and closes sensitively and smoothly, and eliminates opening and closing jamming faults caused by medium adhesion.

[0024] Advantage 3: The structure of the long straight hole and buffer surface in this application, through the rigid support design facing the direction of medium flow, fits the valve stem throughout and provides radial limit, which can effectively offset the lateral impact force brought by the high-speed flow of the medium and suppress the vibration and sway of the valve stem. This can not only ensure the precise and smooth opening and closing of the black water regulating valve, but also reduce component wear, reduce noise, and improve operational stability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a black water regulating valve.

[0026] Figure 2 A schematic diagram of the valve stem structure of a black water regulating valve;

[0027] Figure 3 A schematic diagram of the valve body structure of a black water regulating valve;

[0028] Figure 4 for Figure 1 Enlarged detail image of point A in the middle;

[0029] Figure 5 for Figure 1 Enlarged detail image at point B in the middle;

[0030] Figure 6 This is a schematic diagram of the packing assembly structure of a black water regulating valve;

[0031] Figure 7 A schematic diagram of the structure of a black water regulating valve actuator;

[0032] Figure 8 This is a schematic diagram showing the connection between the valve seat and the black water regulating valve when it is in the closed state.

[0033] In the diagram: 1. Valve body; 11. Flow channel; 12. First tip; 13. Second tip; 14. Long straight hole; 15. Buffer surface; 2. Valve seat; 3. Valve stem; 31. Valve stem body; 32. Smooth stem section; 33. Inverted cone section; 34. First guide surface; 35. Valve core body; 36. Second guide surface; 37. Connecting part; 4. Packing assembly; 41. Spacer ring; 42. Packing body; 43. Packing gasket; 44. Plug; 5. Packing sleeve; 6. Packing pressure plate; 7. Actuator; 71. Drive component; 72. Stabilizing seat; 73. Bracket; 74. Connecting frame; 8. First bolt; 9. Second bolt; 10. Third bolt. Detailed Implementation

[0034] Please see Figures 1-8 This utility model provides a black water regulating valve, including: valve body 1, valve seat 2, valve stem 3, packing assembly 4, packing sleeve 5, packing pressure plate 6, and actuating device 7;

[0035] The valve body 1 has a valve seat 2 at its bottom, and the valve stem 3 is slidably disposed inside the valve body 1. The end of the valve stem 3 away from the valve seat 2 is connected to the actuator 7. The packing plate 6 places the packing assembly 4 between the valve stem 3 and the valve body 1 through the packing sleeve 5.

[0036] In this embodiment, please refer to Figure 1 As shown, when the black water regulating valve is in the closed state, the sealing end of the valve stem 3 near the valve seat 2 forms a precise surface-fit seal with the sealing surface of the valve seat 2, achieving complete sealing of the valve body 1 and blocking the flow path of the medium. When it is necessary to open the black water regulating valve, the on-site operator or the automatic control system activates the actuator 7. The actuator 7 outputs a vertically upward driving force, causing the valve stem 3 to make a vertically upward linear displacement movement. As the valve stem 3 continues to move upward, its sealing end near the valve seat 2 gradually separates from the sealing surface of the valve seat 2, and the sealing relationship between the two is released. The valve body 1 is fully opened, and the medium can pass smoothly and complete the delivery. Thus, the opening operation of the black water regulating valve is completed. If it is necessary to restore the black water regulating valve to the closed state, it is only necessary to control the actuator 7 to reverse the action, driving the valve stem 3 to reset vertically downward until the sealing end of the valve stem 3 is tightly fitted with the sealing surface of the valve seat 2 again, and the sealing is restored.

[0037] It is important to note that during the entire opening and closing process of the black water regulating valve, that is, during the entire process of the valve stem 3 reciprocating linear displacement in the vertical direction, the packing assembly 4 tightly wraps the outer wall of the valve stem 3 to form a dynamic sealing structure, which effectively prevents the medium from leaking outward along the fit gap between the valve stem 3 and the valve body 1. At the same time, it adapts to the axial movement characteristics of the valve stem 3, avoids environmental pollution, equipment corrosion and safety hazards caused by medium leakage, and ensures the sealing stability of the black water regulating valve during long-term operation.

[0038] The valve stem 3 includes: a valve stem body 31, a smooth rod section 32, an inverted cone section 33, a first guide surface 34, a valve core body 35, a second guide surface 36, and a connecting part 37;

[0039] The valve stem body 31 includes a smooth rod section 32 and an inverted cone section 33. One end of the smooth rod section 32 is connected to the actuator 7, and the other end is connected to the inverted cone section 33. The outer wall of the inverted cone section 33 is a first guide surface 34. The large end of the valve core body 35 is connected to the end of the inverted cone section 33 away from the smooth rod section 32 through a connecting part 37. The outer wall of the valve core body 35 is a second guide surface 36 with an inverted cone shape.

[0040] The diameter of the large end of the valve core body 35 is smaller than the diameter of the smooth rod section 32.

[0041] Furthermore, the valve body 1 includes: a flow channel 11, a first tip 12, a second tip 13, an elongated straight hole 14, and a buffer surface 15;

[0042] The valve body 1 has a flow channel 11 and a long straight hole 14 inside. The inlet and outlet of the flow channel 11 are connected to the external mechanism. The middle part of the flow channel 11 is connected to the long straight hole 14, and the inner wall of the connection is provided with a first tip 12 and a second tip 13. The inner wall of the long straight hole 14 located at the first tip 12 is a buffer surface 15 that is set opposite to the direction of medium entry in the flow channel 11.

[0043] The valve stem 3 is slidably connected to the long straight hole 14.

[0044] For a preferred embodiment, please refer to Figure 1 , Figure 2 and Figure 3As shown, in this application, the valve stem 3 is manufactured as a single piece, meaning the valve stem body 31, connecting part 37, and valve core body 35 are all manufactured as a single piece, without any separate splicing, threaded connection, or welded joint. The overall structural rigidity, coaxiality, and sealing consistency are significantly improved compared to a split structure. In terms of structural dimensions, the outer diameter of the large end of the valve core body 35 is smaller than the outer diameter of the smooth section 32 of the valve stem body 31. At the same time, the outer wall of the valve core body 35 and the outer wall of the inverted conical section 33 in the valve stem body 31 both adopt a coaxial inverted conical design, and the two conical surfaces achieve a smooth transition connection. Based on the above structural design, the end of the valve core body 35 near the valve stem body 31 completely fits the end face contour of the valve stem body 31, without any exposed end face or radial stepped structure, eliminating stepped gaps and dead corners for material accumulation, effectively preventing the accumulation of viscous media (the viscous media mentioned in this application, whose fluidity is similar to that of silt) in the flow channel 11 in the stepped structure, and reducing the media accumulation area. The stepless integrated structure in this application effectively avoids local accumulation and scaling of the medium within the flow channel 11, ensuring smooth medium flow inside the flow channel 11 and preventing problems such as stuck opening and closing of the black water regulating valve, reduction of effective flow cross-sectional area, and decrease in overall medium fluidity caused by medium accumulation and blockage. Furthermore, the stepless integrated structure in this application abandons the traditional assembly method of threaded connection between the valve stem body 31 and the valve core body 35. This eliminates the potential for medium accumulation, corrosion, and jamming within the threaded gap, and simplifies the disassembly and maintenance process of the black water regulating valve, effectively reducing the difficulty of operation and maintenance under viscous medium conditions, reducing resistance to disassembly and repair, and further improving the overall operational stability and service life of the black water regulating valve.

[0045] For a preferred embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,and Figure 5 As shown, after prolonged use, the outer wall of the smooth section 32 in the valve stem body 31 of the black water regulating valve will be covered with adhesive media, affecting the sensitivity and smoothness of the valve's opening and closing action (i.e., affecting the vertical movement of the valve stem 3). Specifically: when the valve stem 3 moves upward in the vertical direction (e.g.) Figure 3 As shown by the solid arrow, the adhesive medium on the outer wall of the smooth rod section 32 will be scraped away by the first tip 12 and the second tip 13, changing from being stuck to the outer wall of the smooth rod section 32 to flowing vertically downwards along the outer wall of the smooth rod section 32, thus achieving efficient cleaning of the adhesive medium. The adhesive medium flowing along the outer wall of the smooth rod section 32 will pass through the first guide surface 34 and the second guide surface 36 in sequence, and under the guidance of the two, it will accumulate at the small end of the valve core body 35 away from the inverted cone section 33, and be discharged from the outlet of the flow channel 11 along with the medium in the flow channel 11 (the flow direction of the medium in the flow channel 11 is as follows). Figure 3As indicated by the dashed arrow, there is no sticky medium residue and no local sludge accumulation. The first tip 12 and the second tip 13 in this application can change the state of the sticky medium and, in conjunction with the guiding effect of the first guide surface 34 and the second guide surface 36, form a complete cleaning process of scraping, guiding, and discharging. No additional manual cleaning or auxiliary devices are required, and the sticky medium can be automatically removed. This avoids malfunctions such as increased displacement resistance of the valve stem 3 and jamming of the black water regulating valve caused by the accumulation of sticky medium, and ensures the long-term stable operation of the black water regulating valve.

[0046] It should be noted that if the sticky medium is in a flowing state and the valve stem 3 does not move, the sticky medium can flow along the outer wall of the valve stem 3 under the action of gravity, and be discharged from the valve body 1 after being guided and collected.

[0047] For a preferred embodiment, please refer to Figure 3 As shown, this application provides a buffer surface 15 on the inner wall of the long straight hole 14. The arrangement direction of the buffer surface 15 is opposite to the medium inflow direction at the inlet of the flow channel 11, adapting to the axial reciprocating trajectory of the valve stem 3 throughout the entire opening and closing process. This ensures that the valve stem 3 always slides smoothly axially along the inner wall of the long straight hole 14 during the entire opening and closing process. That is, the outer wall of the valve stem 3 on the side away from the inlet of the flow channel 11 always maintains a tight sliding fit with the buffer surface 15, forming a stable guiding and supporting fit. In coal chemical and other working conditions, the medium is mostly pressurized and high-velocity. When the medium rushes into the valve body 1 at high speed from the inlet of the flow channel 11, it will generate an uneven radial or lateral impact force on the outer wall of the valve stem 3, which can easily cause radial wobble, lateral vibration, or even opening and closing jamming of the valve stem 3. The buffer surface 15 on the inner wall of the elongated straight hole 14 provides rigid lateral support for the valve stem 3 throughout its entire length, effectively offsetting and balancing the radial or lateral forces generated by the flow of the medium. This structurally suppresses the lateral vibration and radial sway tendency of the valve stem 3, ensuring that the valve stem 3 always performs linear reciprocating motion along a predetermined axis. This ensures stable and smooth opening and closing of the black water regulating valve, preventing any jamming or displacement deviation, maintaining normal on / off control functions, reducing component wear caused by vibration and friction, and lowering noise within the black water regulating valve.

[0048] Furthermore, the packing assembly 4 includes: a spacer ring 41, a packing body 42, a packing gasket 43, and a screw plug 44;

[0049] The spacer ring 41 has a packing body 42 at both ends, and a packing gasket 43 is provided on the side of the packing body 42 away from the spacer ring 41. The screw plug 44 passes through the valve body 1 and is connected to the spacer ring 41.

[0050] In this embodiment, please refer to Figure 6As shown, the packing body 42 is used for sealing to prevent leakage of the medium in the flow channel 11 due to the movement of the valve stem 3. After the black water regulating valve has been used for a long time, the packing body 42 needs to be replaced by the operator to improve the sealing effect. It should be noted that the screw plug 44 can better assist the sealing operation of the packing assembly 4.

[0051] Furthermore, the actuator 7 includes: a drive member 71, a stable base 72, a bracket 73, and a connecting frame 74;

[0052] The drive unit 71 is mounted on the stabilizing base 72. The output end of the drive unit 71 is connected to the end of the smooth rod section 32 away from the inverted cone section 33. The stabilizing base 72 is connected to the valve body 1 through the bracket 73. A connecting frame 74 is slidably mounted on the bracket 73. The end of the connecting frame 74 away from the bracket 73 is fixedly connected to the outer wall of the smooth rod section 32.

[0053] In this embodiment, please refer to Figure 7 As shown, the drive component 71 is a pneumatic drive component, but other types can also be used, as long as they can enable the movement of the valve stem 3. The drive component 71 can drive the valve stem 3 to move up and down in the vertical direction, thereby opening and closing the black water regulating valve. During the movement of the valve stem 3, the connecting frame 74 on the outer wall of the smooth rod section 32 in the valve stem body 31 will move synchronously along the bracket 73. The connecting frame 74, together with the long straight hole 14, can provide better guidance for the valve stem 3, enabling it to move accurately in the vertical direction and avoiding deviation.

[0054] Furthermore, the packing plate 6 is connected to the valve body 1 by the first bolt 8, the end of the bracket 73 away from the stabilizing seat 72 is connected to the valve body 1 by the second bolt 9, and the valve seat 2 is connected to the valve body 1 by the third bolt 10.

[0055] In this embodiment, please refer to Figure 1 As shown, when it is necessary to replace the packing assembly 4 and the packing sleeve 5, the operator only needs to remove the first bolt 8 and take off the packing pressure plate 6. When it is necessary to disconnect the black water regulating valve from the actuator 7, the operator only needs to remove the second bolt 9 (it should be noted that at this time, the connection between the connecting bracket 74 and the outer wall of the polished rod section 32 will be changed to a detachable connection). When it is necessary to replace the valve seat 2, the operator only needs to remove the third bolt 10. The operation is simple and convenient, facilitating maintenance and replacement.

[0056] Furthermore, a protective layer is provided on both the first tip 12 and the second tip 13.

[0057] In this embodiment, the protective layer on the first tip 12 and the second tip 13 has a hardness that can change the state of the sticky medium, and it will not damage the structure of the valve stem 3 itself.

[0058] Furthermore, the outer wall of the connecting part 37 matches the shape of the sealing surface of the inner wall of the valve seat 2.

[0059] In this embodiment, when the valve stem 3 moves vertically downwards until the outer wall of the connecting part 37 matches the sealing surface of the inner wall of the valve seat 2, the black water regulating valve's internal flow channel 11 can be blocked, and the black water regulating valve is in the closed state at this time.

[0060] Furthermore, a buffer layer is provided on the inner wall of the valve seat 2 at the position where it mates with the connecting part 37.

[0061] In this embodiment, the buffer layer on the inner wall of the valve seat 2 effectively prevents the wear caused by repeated contact between the connecting part 37 and the sealing surface of the inner wall of the valve seat 2, thus extending the service life of the valve seat 2.

[0062] In another embodiment of this application, a coolant inlet (not shown in the figure) can be provided on the valve body 1, and coolant can be added regularly. This can avoid problems such as the packing assembly 4 being scratched, the valve stem 3 surface temperature rising abnormally, and the surface precision decreasing after the black water regulating valve has been running for a long time. It can also avoid the increase of friction on the valve stem 3 surface and prevent external leakage.

[0063] As a preferred embodiment, this application eliminates the need for parts such as stuffing boxes, guide sleeves, venturi extension tubes, and outlet mating flanges, thus avoiding media leakage at the locations of these parts and saving on the manufacturing cost of the black water regulating valve.

[0064] In practice, when the black water regulating valve is closed, the valve stem 3 and valve seat 2 are tightly sealed, blocking the flow of medium in the flow channel 11. The packing body 42 in the packing assembly 4, together with the screw plug 44, achieves a seal, preventing leakage of medium. The buffer surface 15 of the inner wall of the long straight hole 14 is in full contact with the outer wall of the valve stem 3, offsetting the lateral force caused by the impact of the medium and suppressing the vibration of the valve stem 3 and the noise inside the black water regulating valve. When the black water regulating valve needs to be opened, the drive component 71 outputs axial power, driving the valve stem 3 to move smoothly upward in the vertical direction. The connecting frame 74 and the bracket 73, together with the long straight hole 14, form a double guide, ensuring that the valve stem 3 has no deviation or linear displacement, and the medium flows normally. At the same time, the sticky medium attached to the outer wall of the smooth rod section 32 is scraped off by the first tip 12 and the second tip 13, and then, with the directional guidance of the first guide surface 34 and the second guide surface 36, it is discharged from the valve body 1 along with the mainstream medium, avoiding stagnation and blockage. When the black water regulating valve needs to be closed, the drive component 71 moves in the opposite direction, driving the valve stem 3 to move downward and reset.

[0065] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A black water regulating valve, characterized in that: include: Valve body (1), valve seat (2), valve stem (3), packing assembly (4), packing sleeve (5), packing plate (6), and actuator (7); The valve body (1) is provided with a valve seat (2) at its bottom. The valve stem (3) is slidably disposed in the valve body (1). The end of the valve stem (3) away from the valve seat (2) is connected to the actuator (7). The packing plate (6) uses the packing sleeve (5) to place the packing assembly (4) between the valve stem (3) and the valve body (1). The valve stem (3) includes: valve stem body (31), smooth rod section (32), inverted cone section (33), first guide surface (34), valve core body (35), second guide surface (36), and connecting part (37); The valve stem body (31) includes the smooth rod section (32) and the inverted cone section (33). One end of the smooth rod section (32) is connected to the actuator (7), and the other end is connected to the inverted cone section (33). The outer wall of the inverted cone section (33) is the first guide surface (34). The large end of the valve core body (35) is connected to the end of the inverted cone section (33) away from the smooth rod section (32) through the connecting part (37). The outer wall of the valve core body (35) is the second guide surface (36) with an inverted cone shape. The diameter of the large end of the valve core (35) is smaller than the diameter of the smooth rod section (32).

2. The black water regulating valve according to claim 1, characterized in that: The valve body (1) includes: a flow channel (11), a first tip (12), a second tip (13), a long straight hole (14), and a buffer surface (15). The valve body (1) has a flow channel (11) and a long straight hole (14) inside. The inlet and outlet of the flow channel (11) are connected to an external mechanism. The middle part of the flow channel (11) is connected to the long straight hole (14), and the inner wall of the connection is provided with a first tip (12) and a second tip (13). The inner wall of the long straight hole (14) located at the first tip (12) is a buffer surface (15) that is arranged opposite to the direction of medium entry in the flow channel (11). The valve stem (3) is slidably connected to the long straight hole (14).

3. A black water regulating valve according to claim 1, characterized in that: The packing assembly (4) includes: a spacer ring (41), a packing body (42), a packing gasket (43), and a screw plug (44). The spacer (41) is provided with packing bodies (42) at both ends, and a packing gasket (43) is provided on the side of the packing body (42) away from the spacer (41). The screw plug (44) passes through the valve body (1) and is connected to the spacer (41).

4. A black water regulating valve according to claim 1, characterized in that: The actuator (7) includes: a drive unit (71), a stabilizing base (72), a bracket (73), and a connecting frame (74). The driving component (71) is mounted on the stabilizing base (72). The output end of the driving component (71) is connected to the end of the smooth rod section (32) away from the inverted cone section (33). The stabilizing base (72) is connected to the valve body (1) through the bracket (73). The connecting frame (74) is slidably mounted on the bracket (73). The end of the connecting frame (74) away from the bracket (73) is fixedly connected to the outer wall of the smooth rod section (32).

5. A black water regulating valve according to claim 4, characterized in that: The packing plate (6) is connected to the valve body (1) by the first bolt (8), the end of the bracket (73) away from the stabilizing seat (72) is connected to the valve body (1) by the second bolt (9), and the valve seat (2) is connected to the valve body (1) by the third bolt (10).

6. A black water regulating valve according to claim 2, characterized in that: Both the first tip (12) and the second tip (13) are provided with a protective layer.

7. A black water regulating valve according to claim 1, characterized in that: The outer wall of the connecting part (37) matches the sealing surface shape of the inner wall of the valve seat (2).

8. A black water regulating valve according to claim 7, characterized in that: A buffer layer is provided on the inner wall of the valve seat (2) at the position where it mates with the connecting part (37).

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