A self-adaptive grinding device for the spherical surface of a stopcock valve tapered sealing ball

Abstract

The application provides a tap ball valve taper sealing surface self-adapting grinding equipment and belongs to the technical field of valve manufacturing. The equipment comprises a machine tool, the output end of the machine tool is fixedly connected with a chuck, the inner wall of the chuck is clamped and fixed with a cylindrical handle, the tail end of the cylindrical handle is fixedly connected with a valve core, the outer surface of the valve core is provided with a circular arc ring belt, and the top outer wall of the machine tool is fixedly connected with an adjusting seat. The grinding mechanism is arranged, so that the multi-way rotary joint supplies different temperature mediums to the taper cooling chamber and the spherical surface cooling chamber respectively; for the circular arc ring belt area with intense friction, low-temperature mediums are supplied to the first spherical surface cooling chamber and the second spherical surface cooling chamber for intensified cooling; for the taper area with less heat generation, mediums with higher temperature are supplied to the first taper cooling chamber, the second taper cooling chamber and the third taper cooling chamber, so as to avoid local thermal stress caused by overcooling and further guarantee the precision of the grinding process of the valve core sealing surface.

Description

Technical Field

[0001] This invention relates to the field of valve manufacturing technology, and in particular to an adaptive grinding device for the conical sealing spherical surface of a plug valve. Background Technology

[0002] A plug valve achieves its shut-off function through a tight fit between the plug body and the sealing surface on the inner wall of the valve body. To combine the self-locking advantages of conical seals with the self-aligning capability of spherical seals, high-performance plug valves currently mostly adopt a conical sealing spherical structure. The sealing working area of ​​this structure consists of a conical sealing surface and a spherical sealing band, typically with a convex spherical ring band connected to the large end of the conical surface. This type of composite sealing surface is extremely sensitive to contour accuracy and mating fit; any minute shape deviation can lead to seal failure under high-pressure conditions.

[0003] In summary, during the grinding process of the conical valve core, although the valve core rotation speed is low, the metal hard sealing surface of the valve core continues to rub under the pressure of the grinding tool, which still causes local temperature rise. Due to the large wall thickness of the conical sealing section of the plug, the heat capacity is high and the heat dissipation path is short, so the heat is easily conducted away. On the other hand, the convex spherical ring on the outer surface of the conical valve core is relatively thin and isolated, resulting in a small heat capacity, slow heat dissipation, and a more significant temperature rise. This temperature difference leads to inconsistent thermal expansion between the two during the grinding process, causing the relative positional relationship between the conical and spherical surfaces to be unstable. When the grinding is completed and the valve core gradually cools to room temperature, the spherical ring may experience local necking due to greater thermal contraction, which in turn causes different deformations of the sealing surface, affecting the sealing effect of the valve core.

[0004] Therefore, this application provides an adaptive grinding device for the conical seal spherical surface of a plug valve to meet the requirements. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive grinding device for the conical seal spherical surface of a plug valve to solve the aforementioned problems. The cooling medium enters from the stationary stator end of a multi-channel rotary joint and is distributed through channels within the rotor end. It flows sequentially through the first, second, and third conical cooling chambers via a first injection pipe to exchange heat on the valve core's conical surface; and enters the first and second spherical cooling chambers via a second injection pipe to cool the arc-shaped annular region, thus solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An adaptive grinding device for a conical sealing spherical surface of a plug valve includes a machine tool. A chuck is fixedly connected to the output end of the machine tool. A cylindrical shank is clamped and fixed on the inner wall of the chuck. A valve core is fixedly connected to the end of the cylindrical shank. An arc ring is provided on the outer surface of the valve core. An adjusting seat is fixedly connected to the top outer wall of the machine tool. A traveling frame is provided at the output end of the adjusting seat. A slide is provided at the output end of the traveling frame. A grinding mechanism is provided on the top of the slide.

[0007] Optionally, the grinding mechanism includes a fixed frame, which is fixedly connected to the top of the slide block. A drive motor is fixedly connected to the top of the fixed frame, and a lead screw is fixedly connected to the output end of the drive motor. A first sliding frame is threaded onto the outer surface of the lead screw. A connecting frame is fixedly connected to the outer wall of the first sliding frame, and a servo motor is fixedly connected to the outer wall of the connecting frame. A grinding block is fixedly connected to the output end of the servo motor. A multi-channel rotary joint is provided on the outer wall of the grinding block away from the servo motor. The position of the grinding block is adjusted by the lead screw and driven by an independent servo motor to achieve stable differential grinding and improve the uniformity of the valve core sealing surface.

[0008] Optionally, the multi-channel rotary joint includes a stator end and a rotor end, the rotor end is fixedly connected to the grinding block, and the rotor end and the stator end are rotatably connected.

[0009] Optionally, a dust removal frame is provided above the contact area between the grinding block and the valve core. The dust removal frame is fixedly connected to the inner wall of the first sliding frame, and a suction pipe is fixedly connected to the outer wall of the dust removal frame. The dust removal frame is used to remove iron filings generated during the grinding process through the suction pipe, thereby timely removing metal powder and iron filings from the grinding area, avoiding scratches on the processed surface, and ensuring the quality of the sealing surface.

[0010] Optionally, a guide shaft is fixedly connected to the outer wall of the first sliding frame, a fixing block is fixedly connected to the end of the guide shaft, a threaded rod is rotatably connected to the inner wall of the end of the fixing block away from the guide shaft, a handwheel is fixedly connected to the outer wall of one end of the threaded rod, and a second sliding frame is rotatably connected to the outer surface of the threaded rod. The position of the second sliding frame can be adjusted by rotating the handwheel, which is convenient for accommodating the installation of grinding blocks of different specifications.

[0011] Optionally, the inner wall of the second sliding bracket near the threaded rod is movably sleeved on the outer surface of the guide shaft, and the inner wall of the second sliding bracket away from the threaded rod is fixedly connected to the stator end.

[0012] Optionally, the outer surface of the grinding block is provided with a first groove and a second groove, and the inner wall of the grinding block is provided with a first spherical cooling chamber and a second spherical cooling chamber on the side close to the first groove and the second groove, respectively, so as to enhance the heat exchange in the arc ring area.

[0013] Optionally, the inner wall of the grinding block is fixedly connected with a second injection pipe and a second drainage pipe. The second injection pipe and the second drainage pipe are respectively connected to the first groove and the second groove. The ends of the second injection pipe and the second drainage pipe penetrate the grinding block and are fixedly connected to the rotor end.

[0014] Optionally, the inner wall of the grinding block is further provided with a first conical cooling chamber, a second conical cooling chamber and a third conical cooling chamber, and the inner wall of the grinding block is fixedly connected with a first injection pipe and a first drain pipe.

[0015] Optionally, the first injection pipe and the first discharge pipe are connected to the first conical cooling chamber, the second conical cooling chamber and the third conical cooling chamber, respectively. The ends of the first injection pipe and the first discharge pipe pass through the grinding block and are fixedly connected to the rotor end.

[0016] Optionally, when the servo motor drives the grinding block to rotate, the rotor end rotates synchronously with the grinding block, while the stator end remains stationary. This is used to deliver media of different temperatures to the first and second injection pipes. For the arc ring area with a large contact area and intense friction, a cooling medium with a lower temperature is introduced to enhance cooling, while for the conical grinding area with relatively low heat generation, a cooling medium with a slightly higher temperature is introduced.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: In the above-described solution, the adaptive grinding equipment for the conical seal spherical surface of the plug valve provided in this application, by setting a grinding mechanism, allows the multi-channel rotary joint to supply media of different temperatures to the conical cooling chamber and the spherical cooling chamber respectively. For the arc-shaped ring area with severe friction, low-temperature media are introduced into the first and second spherical cooling chambers for enhanced cooling. For the conical area with less heat generation, higher-temperature media are supplied to the first, second, and third conical cooling chambers, thereby avoiding overcooling and generating local thermal stress, and thus ensuring the accuracy of the valve core sealing surface during the grinding process. Meanwhile, the first spherical cooling chamber and the second spherical cooling chamber are located close to the first groove and the second groove, respectively, thereby improving the heat exchange efficiency of the area, avoiding local heat accumulation in the arc ring, and thus improving the grinding quality of the valve core sealing surface. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0019] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the machine tool structure of the present invention; Figure 3 This is a schematic diagram of the grinding mechanism structure of the present invention; Figure 4 This is an exploded view of the grinding mechanism of the present invention; Figure 5 This is a schematic diagram of the grinding block structure of the present invention; Figure 6 This is a cross-sectional view of the first injection tube and the first discharge tube of the present invention; Figure 7 This is a cross-sectional view of the second injection pipe and the second discharge pipe of the present invention. Figure 8 For the present invention Figure 1 A magnified structural diagram of A in the diagram.

[0020] Figure label: 1. Machine tool; 2. Chuck; 3. Cylindrical shank; 4. Valve core; 41. Arc ring belt; 5. Adjusting seat; 6. Traveling frame; 7. Slide; 8. Grinding mechanism; 81. Fixed frame; 82. Drive motor; 83. Lead screw; 84. First sliding frame; 841. Guide shaft; 842. Fixed block; 843. Threaded rod; 844. Handwheel; 845. Second sliding frame; 85. Connecting frame; 86. Dust removal frame; 87. Dust suction pipe; 88. Servo motor; 89. Grinding block; 891. First spherical cooling chamber; 892. Second spherical cooling chamber; 893. First conical cooling chamber; 894. Second conical cooling chamber; 895. Third conical cooling chamber; 896. First injection pipe; 897. First drain pipe; 898. Second injection pipe; 899. Second drain pipe; 810. First groove; 811. Second groove; 812. Multi-channel rotary joint; 8121. Stator end; 8122. Rotor end.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0022] The following is a detailed description of the adaptive grinding device for the conical sealing spherical surface of a plug valve provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; for some known technologies, those skilled in the art can also use other alternative methods to implement the invention; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0023] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0024] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0025] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0026] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0027] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides an adaptive grinding device for a cone-shaped sealing spherical surface of a plug valve, including a machine tool 1. A chuck 2 is fixedly connected to the output end of the machine tool 1. A cylindrical shank 3 is clamped and fixed on the inner wall of the chuck 2. A valve core 4 is fixedly connected to the end of the cylindrical shank 3. An arc ring band 41 is provided on the outer surface of the valve core 4. An adjusting seat 5 is fixedly connected to the top outer wall of the machine tool 1. A traveling frame 6 is provided at the output end of the adjusting seat 5. A slide 7 is provided at the output end of the traveling frame 6. The traveling frame 6 is used to drive the slide 7 to feed in the horizontal direction, thereby ensuring that the contact pressure between the grinding block 89 and the valve core 4 is controllable. A grinding mechanism 8 is provided on the top of the slide 7.

[0028] In this embodiment, as Figure 3 and Figure 4 As shown, the grinding mechanism 8 includes a fixed frame 81, which is fixedly connected to the top of the slide block 7. A drive motor 82 is fixedly connected to the top of the fixed frame 81. A lead screw 83 is fixedly connected to the output end of the drive motor 82. A first sliding frame 84 is threadedly connected to the outer surface of the lead screw 83. A connecting frame 85 is fixedly connected to the outer wall of the first sliding frame 84. A servo motor 88 is fixedly connected to the outer wall of the connecting frame 85. A grinding block 89 is fixedly connected to the output end of the servo motor 88. The servo motor 88 drives the grinding block 89 to rotate in the same direction, forming differential grinding with the rotation of the valve core 4, thereby improving the grinding uniformity of the sealing surface. A multi-channel rotary joint 812 is provided on the outer wall of the grinding block 89 away from the servo motor 88.

[0029] The multi-channel rotary joint 812 includes a stator end 8121 and a rotor end 8122. The rotor end 8122 is fixedly connected to the grinding block 89. The stator end 8121 of the multi-channel rotary joint 812 is fixed on the second sliding frame 845 and remains stationary, while the rotor end 8122 rotates synchronously with the grinding block 89. The multi-channel rotary joint 812 has independent channels inside to ensure that the media do not cross-flow, thereby connecting the stationary external pipeline with the pipeline inside the grinding block 89 to realize the transportation of media.

[0030] like Figure 5 As shown, a guide shaft 841 is fixedly connected to the outer wall of the first sliding frame 84, and a fixing block 842 is fixedly connected to the end of the guide shaft 841. A threaded rod 843 is rotatably connected to the inner wall of the end of the fixing block 842 away from the guide shaft 841. A handwheel 844 is fixedly connected to the outer wall of one end of the threaded rod 843. When the handwheel 844 is rotated, the threaded rod 843 rotates synchronously and drives the second sliding frame 845 to move axially along the guide shaft 841, thereby adjusting the relative position between the multi-channel rotary joint 812 and the grinding block 89 to meet the installation requirements of grinding blocks 89 of different specifications. The second sliding frame 845 is rotatably connected to the outer surface of the threaded rod 843, and the inner wall of the second sliding frame 845 near the threaded rod 843 is movably sleeved on the outer surface of the guide shaft 841.

[0031] like Figure 6 As shown, the inner wall of the grinding block 89 is also provided with a first conical cooling chamber 893, a second conical cooling chamber 894 and a third conical cooling chamber 895. The first conical cooling chamber 893, the second conical cooling chamber 894 and the third conical cooling chamber 895 are arranged sequentially in the axial direction of the grinding block 89, which are different areas of the conical surface of the valve core 4 respectively. The inner wall of the grinding block 89 is fixedly connected with a first liquid injection pipe 896 and a first liquid discharge pipe 897.

[0032] The first injection pipe 896 and the first discharge pipe 897 are respectively connected to the first conical cooling chamber 893, the second conical cooling chamber 894, and the third conical cooling chamber 895. The ends of the first injection pipe 896 and the first discharge pipe 897 pass through the grinding block 89 and are fixedly connected to the rotor end 8122. The first injection pipe 896 and the first discharge pipe 897 are shared liquid supply and drainage channels for the first conical cooling chamber 893, the second conical cooling chamber 894, and the third conical cooling chamber 895. The internal passage is connected to the corresponding passage of the multi-channel rotary joint 812, so that the cooling medium enters from the inlet of the stator end 8121, passes through the internal channel of the rotor end 8122, and flows through the first liquid injection pipe 896 in sequence through the first conical cooling chamber 893, the second conical cooling chamber 894 and the third conical cooling chamber 895 to cool different areas of the conical surface of the valve core 4 respectively. After heat exchange, the medium returns to the rotor end 8122 through the first liquid discharge pipe 897 and is discharged from the outlet of the stator end 8121.

[0033] like Figure 7 As shown, the outer surface of the grinding block 89 is provided with a first groove 810 and a second groove 811. The first spherical cooling chamber 891 and the second spherical cooling chamber 892 are respectively close to the first groove 810 and the second groove 811 to improve the heat exchange efficiency for the arc ring belt 41 area, thereby alleviating the problem of heat accumulation in the arc ring belt 41 area due to friction. The inner wall of the grinding block 89 is provided with a first spherical cooling chamber 891 and a second spherical cooling chamber 892 on the side close to the first groove 810 and the second groove 811.

[0034] The inner wall of the grinding block 89 is fixedly connected to a second liquid injection pipe 898 and a second liquid discharge pipe 899. The second liquid injection pipe 898 and the second liquid discharge pipe 899 are respectively connected to the first groove 810 and the second groove 811. The ends of the second liquid injection pipe 898 and the second liquid discharge pipe 899 penetrate the grinding block 89 and are fixedly connected to the rotor end 8122. The second liquid injection pipe 898 and the second liquid discharge pipe 899 are the liquid inlet and liquid outlet channels of the first spherical cooling chamber 891 and the second spherical cooling chamber 892, respectively. They are connected to the corresponding passage of the multi-pass rotary joint 812 inside the rotor end 8122. The cooling medium enters from the inlet of the stator end 8121, flows through the internal channel of the rotor end 8122, and is then sent by the second liquid injection pipe 898 into the first spherical cooling chamber 891 and the second spherical cooling chamber 892 to cool the arc ring area 41 of the valve core 4. The medium that has absorbed heat returns to the rotor end 8122 through the second liquid discharge pipe 899 and is discharged from the outlet of the stator end 8121, forming a complete cooling cycle.

[0035] like Figure 8 As shown, a dust removal frame 86 is provided above the contact area between the grinding block 89 and the valve core 4. The dust removal frame 86 is fixedly connected to the inner wall of the first sliding frame 84, and a suction pipe 87 is fixedly connected to the outer wall of the dust removal frame 86. The end of the suction pipe 87 is connected to an industrial vacuum cleaner. The industrial vacuum cleaner provides continuous negative pressure suction. The dust removal frame 86 moves synchronously with the first sliding frame 84, and its suction port is always aligned with the grinding position between the two. This allows the metal filings and grinding powder generated during the grinding process to enter the interior of the dust removal frame 86 through the suction hole under the action of negative pressure, and then be collected into the dust collection box through the suction pipe 87, effectively preventing the metal filings from scratching the processed surface.

[0036] When the servo motor 88 drives the grinding block 89 to rotate, the rotor end 8122 rotates synchronously with the grinding block 89, while the stator end 8121 remains stationary. This is used to supply media of different temperatures to the first injection pipe 896 and the second injection pipe 898. Depending on the heating temperature of different areas of the grinding block 89, cooling media of different temperatures can be supplied to the first injection pipe 896 and the second injection pipe 898 through the multi-channel rotary joint 812. For the arc ring belt 41 area with a large contact area and intense friction, a lower temperature cooling medium is introduced to enhance cooling; while for the conical grinding area with relatively less heat generation, a slightly higher temperature cooling medium is introduced to avoid overcooling and causing local thermal stress in the grinding block 89.

[0037] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rotary valve conical sealing spherical adaptive grinding device, comprising a machine tool (1), wherein a chuck (2) is fixedly connected to the output end of the machine tool (1), a cylindrical shank (3) is clamped and fixed on the inner wall of the chuck (2), a valve core (4) is fixedly connected to the end of the cylindrical shank (3), an arc ring band (41) is provided on the outer surface of the valve core (4), an adjusting seat (5) is fixedly connected to the top outer wall of the machine tool (1), a traveling frame (6) is provided at the output end of the adjusting seat (5), and a slide (7) is provided at the output end of the traveling frame (6), characterized in that, A grinding mechanism (8) is provided on the top of the slide (7); The grinding mechanism (8) includes: A fixed frame (81) is fixedly connected to the top of the slide (7). A drive motor (82) is fixedly connected to the top of the fixed frame (81). A lead screw (83) is fixedly connected to the output end of the drive motor (82). A first sliding frame (84) is threadedly connected to the outer surface of the lead screw (83). A connecting frame (85) is fixedly connected to the outer wall of the first sliding frame (84). A servo motor (88) is fixedly connected to the outer wall of the connecting frame (85). A grinding block (89) is fixedly connected to the output end of the servo motor (88). A multi-channel rotary joint (812) is provided on the outer wall of the grinding block (89) away from the servo motor (88).

2. The adaptive grinding equipment for the conical sealing spherical surface of the plug valve according to claim 1, characterized in that, The multi-channel rotary joint (812) includes a stator end (8121) and a rotor end (8122). The rotor end (8122) is fixedly connected to the grinding block (89), and the rotor end (8122) is rotatably connected to the stator end (8121).

3. The adaptive grinding equipment for the conical sealing spherical surface of the plug valve according to claim 1, characterized in that, A dust removal frame (86) is provided above the contact area between the grinding block (89) and the valve core (4). The dust removal frame (86) is fixedly connected to the inner wall of the first sliding frame (84). A suction pipe (87) is fixedly connected to the outer wall of the dust removal frame (86). The dust removal frame (86) is used to remove iron filings generated during the grinding process through the suction pipe (87).

4. The adaptive grinding equipment for the conical sealing spherical surface of the plug valve according to claim 1, characterized in that, The outer wall of the first sliding frame (84) is fixedly connected to a guide shaft (841), and the end of the guide shaft (841) is fixedly connected to a fixing block (842). The inner wall of the fixed block (842) away from the guide shaft (841) is rotatably connected to a threaded rod (843). The outer wall of the threaded rod (843) is fixedly connected to a handwheel (844), and the outer surface of the threaded rod (843) is rotatably connected to a second sliding frame (845).

5. The adaptive grinding equipment for the conical sealing spherical surface of the plug valve according to claim 4, characterized in that, The inner wall of the second sliding frame (845) near the threaded rod (843) is movably sleeved on the outer surface of the guide shaft (841), and the inner wall of the second sliding frame (845) away from the threaded rod (843) is fixedly connected to the stator end (8121).

6. The adaptive grinding equipment for the conical seal spherical surface of the plug valve according to claim 1, characterized in that, The outer surface of the grinding block (89) is provided with a first groove (810) and a second groove (811). The inner wall of the grinding block (89) is provided with a first spherical cooling chamber (891) and a second spherical cooling chamber (892) on the side close to the first groove (810) and the second groove (811).

7. The adaptive grinding equipment for the conical seal spherical surface of the plug valve according to claim 6, characterized in that, The inner wall of the grinding block (89) is fixedly connected with a second injection pipe (898) and a second drain pipe (899). The second injection pipe (898) and the second drain pipe (899) are respectively connected to the first groove (810) and the second groove (811). The ends of the second injection pipe (898) and the second drain pipe (899) penetrate the grinding block (89) and are fixedly connected to the rotor end (8122).

8. The adaptive grinding equipment for the conical seal spherical surface of the plug valve according to claim 1, characterized in that, The inner wall of the grinding block (89) is also provided with a first conical cooling chamber (893), a second conical cooling chamber (894) and a third conical cooling chamber (895), and the inner wall of the grinding block (89) is fixedly connected with a first injection pipe (896) and a first drain pipe (897).

9. The adaptive grinding equipment for the conical sealing spherical surface of the plug valve according to claim 8, characterized in that, The first injection pipe (896) and the first discharge pipe (897) are connected to the first conical cooling chamber (893), the second conical cooling chamber (894) and the third conical cooling chamber (895) respectively. The ends of the first injection pipe (896) and the first discharge pipe (897) pass through the grinding block (89) and are fixedly connected to the rotor end (8122).

10. The adaptive grinding equipment for the conical sealing spherical surface of the plug valve according to claim 2, characterized in that, When the servo motor (88) drives the grinding block (89) to rotate, the rotor end (8122) rotates synchronously with the grinding block (89), and the stator end (8121) remains stationary, for conveying media of different temperatures into the first injection pipe (896) and the second injection pipe (898).

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