Wet-type grinding device for sealing conical surface of valve sleeve and grinding method of wet-type grinding device

Abstract

The invention discloses a wet-type grinding device for a sealing conical surface of a valve sleeve and a grinding method of the wet-type grinding device, and belongs to the technical field of valve sleeve grinding. A wet type grinding device for a sealing conical surface of a valve sleeve comprises a machining table, a positioning disc, a lower grinding head, a driven belt wheel, an upper grinding head, a cooling liquid spraying assembly and a dynamic clamping mechanism. The design that the upper grinding head and the lower grinding head are provided with reverse conical grinding faces is adopted, synchronous grinding of the double conical faces of the valve sleeve is achieved, in the downward moving process of the upper grinding head, the dynamic clamping mechanism can be linked to trigger the radial clamping action on the valve sleeve, the mechanism and rotation of the driven belt wheel cooperatively operate, a driving mechanism does not need to be additionally arranged, the waiting time is shortened, and the working efficiency is improved. And meanwhile, when the valve sleeve is in a stable rotating and clamping state, the valve sleeve can be matched with cooling liquid sprayed by the static V-shaped spraying pipe so that the cooling liquid can accurately cover a grinding contact area, and the grinding quality and efficiency are greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve sleeve grinding, and particularly relates to a wet grinding device for a valve sleeve sealing conical surface and a grinding method thereof. Background Art

[0002] In industrial production, as a key component, the processing quality of the sealing conical surface of a valve sleeve directly affects the sealing performance and service life of the valve. Therefore, the valve sleeve needs to be ground. However, when traditional valve sleeves are ground, most of them use a single grinding head for grinding operations. When grinding the double conical surfaces of a valve sleeve, the single grinding head can only process the two conical surfaces sequentially and cannot perform simultaneous grinding of the two conical surfaces. For example, when processing a valve sleeve with two different taper requirements, the grinding head first grinds one conical surface, and after completion, the position of the grinding head or the workpiece is adjusted to grind the other conical surface. This step-by-step processing method will inevitably result in different grinding times for the two conical surfaces, increasing the possibility of generating processing errors. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a wet grinding device for a valve sleeve sealing conical surface and a grinding method thereof that can overcome the above problems or at least partially solve the above problems.

[0004] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is: a wet grinding device for a valve sleeve sealing conical surface, including a processing table, a positioning disk fixedly arranged on the processing table, a lower grinding head with a conical grinding surface fixedly arranged at the center of the top of the positioning disk, a driven pulley rotatably sleeved on the outer periphery of the lower grinding head, the driven pulley forming a rotating pair with the positioning disk through a bearing, an upper grinding head arranged directly above the lower grinding head and axially liftable, the bottom surface of the upper grinding head forming a reverse conical surface corresponding to the conical grinding surface of the lower grinding head, a coolant spraying assembly arranged below the lower grinding head, and a dynamic clamping mechanism arranged on the top of the positioning disk. The dynamic clamping mechanism automatically triggers radial clamping in response to the axial pressure when the valve sleeve is pressed between the upper grinding head and the lower grinding head, and drives the valve sleeve to perform synchronous grinding of the double conical surfaces following the rotation of the driven pulley.

[0005] Preferably, an L-shaped mounting frame is fixedly connected to the top of the processing table, a vertical first driving part is arranged on the L-shaped mounting frame, an output end of the first driving part is fixedly connected to a lifting block, and the lifting block is fixedly connected to the top of the upper grinding head.

[0006] Preferably, the coolant injection assembly includes L-shaped support rods symmetrically fixed on both sides of the lifting block. The end of the L-shaped support rod is fixedly connected with an annular diverter. An annular liquid storage cavity is arranged inside the annular diverter. The annular diverter is communicated with an infusion hose communicated with the inside of the annular liquid storage cavity. A plurality of V-shaped injection pipes are communicated along the top of the annular diverter and are circumferentially equidistantly distributed. And the output end directions of the V-shaped injection pipes are close to the contact interface where the upper grinding head and the valve sleeve meet.

[0007] Preferably, the dynamic clamping mechanism includes a pair of L-shaped connecting rods arranged above the driven pulley. A first cavity and a second cavity which are communicated with each other are arranged inside the L-shaped connecting rod. One end of the L-shaped connecting rod is slidably connected with a vertical toggle rod. One end of the vertical toggle rod is connected with a contact plate corresponding to the bottom of the annular diverter. The other end of the vertical toggle rod is provided with a first elastic telescopic member located inside the first cavity. The other end of the L-shaped connecting rod is slidably connected with a horizontal push rod. One end of the horizontal push rod is fixedly connected with an arc-shaped clamping plate. The other end of the horizontal push rod is provided with a second elastic telescopic member located inside the second cavity.

[0008] Preferably, a positioning plate is fixedly connected between the two L-shaped connecting rods. A plug hole which fits the surface of the valve sleeve is opened at the center of the surface of the positioning plate.

[0009] Preferably, the first elastic telescopic member includes a first spring located inside the first cavity. An annular support block is fixedly connected between one end of the first spring and the inner wall of the first cavity. A first moving block is fixedly connected between the other end of the first spring and one end of the vertical toggle rod. The second elastic telescopic member includes a second spring located inside the second cavity. One end of the second spring is fixedly connected to the inner wall of the second cavity. A second moving block is fixedly connected between the other end of the second spring and one end of the horizontal push rod.

[0010] Preferably, a vertical fixing plate is fixedly connected to the L-shaped connecting rod. The bottom of the vertical fixing plate is fixedly connected to the top of the positioning disk.

[0011] Preferably, when the annular diverter moves downward to press the contact plate against the top of the L-shaped connecting rod, the arc-shaped clamping plate is in a fixed state. When the annular diverter moves upward to separate from the surface of the contact plate, the arc-shaped clamping plate is in an active state.

[0012] Preferably, a horizontal mounting plate is fixedly connected to one side of the processing table. A second driving part is mounted at the bottom of the horizontal mounting plate. The output end of the second driving part is fixedly connected with a main pulley located above the top of the horizontal mounting plate. A matching synchronous toothed belt is connected between the main pulley and the driven pulley.

[0013] The present invention also provides a grinding method for a wet grinding device of a valve sleeve sealing cone surface, including: Step S1: Place one end of the valve sleeve on the top of the lower grinding head to ensure that the valve sleeve is initially aligned with the conical grinding surface of the lower grinding head; Step S2: Drive the upper grinding head to move downward. As the upper grinding head gradually moves downward and presses against the valve sleeve, an axial pressure is generated between the upper grinding head and the lower grinding head. Under the action of the axial pressure, the linkage dynamic clamping mechanism is triggered to radially clamp the valve sleeve, so that the valve sleeve is firmly fixed. Then, start the driven pulley to drive the valve sleeve clamped by the dynamic clamping mechanism to rotate between the upper grinding head and the lower grinding head. At the same time, start the coolant spraying component, and the coolant is evenly sprayed onto the grinding area to provide sufficient cooling and lubrication for the grinding process to ensure the smooth progress of grinding; Step S3: When the double conical surface grinding of the valve sleeve is completed, control the upper grinding head to move upward, and the dynamic clamping mechanism relaxes the clamping of the valve sleeve. At this time, the operator takes out the ground valve sleeve from the lower grinding head to complete the entire grinding process.

[0014] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: First of all, through the reverse conical grinding surface design of the upper and lower grinding heads, the synchronous grinding of the double conical surfaces of the valve sleeve is realized, effectively ensuring the accuracy and consistency of the double conical surfaces; Secondly, the dynamic clamping mechanism can respond to the axial pressure generated when the upper grinding head presses against the valve sleeve, and automatically trigger the radial clamping action. This mechanism works in coordination with the rotation of the driven pulley, without the need to separately design a driving mechanism, reducing the waiting time, further improving the production efficiency and product quality. On the other hand, when the valve sleeve is in a stable rotating clamping state, it can also cooperate with the coolant sprayed by the static V-shaped spray pipe to make the coolant accurately cover the contact areas of the valve sleeve with the upper grinding head and the lower grinding head, greatly improving the grinding quality and efficiency. Brief Description of the Drawings

[0015] In the drawings: Figure 1 is the overall structural schematic diagram of a wet grinding device for the sealing conical surface of a valve sleeve proposed by the present invention; Figure 2 is the present invention Figure 1 the first connection structural schematic diagram of the lower grinding head and the upper grinding head in the present invention; Figure 3 is the present invention Figure 2 the sectional structural schematic diagram of the annular diverter in the present invention; Figure 4 is the present invention Figure 3 the exploded connection structural schematic diagram of the positioning disk and the driven pulley in the present invention; Figure 5 is the present invention Figure 4 the sectional structural schematic diagram of the L-shaped connecting rod in the present invention; Figure 6 For the present invention Figure 5 A local enlarged structural diagram of the part; Figure 7 For the present invention Figure 5 Schematic diagram of the connection structure between the middle contact plate and the vertical toggle rod; Figure 8 For the present invention Figure 7 Schematic diagram of the connection structure between the center positioning plate and the L-shaped connecting rod.

[0016] In the figure: 1, processing table; 2, positioning plate; 21, lower grinding head; 22, slave pulley; 3, upper grinding head; 4, L-shaped mounting frame; 41, first driving part; 42, lifting block; 43, L-shaped support rod; 44, annular diverter; 45, annular liquid storage chamber; 46, infusion hose; 47, V-shaped injection pipe; 5, L-shaped connecting rod; 51, first chamber; 52, second chamber; 53, vertical toggle rod; 54, resistance plate; 55, horizontal push rod; 56, arc clamping plate; 57, first spring; 58, annular support block; 59, first moving block; 510, second spring; 511, second moving block; 6, vertical fixing plate; 7, horizontal mounting plate; 71, second driving part; 72, main pulley; 73, synchronous toothed belt; 8, positioning plate; 81, plug hole. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] Example 1: Reference Figures 1-8A wet grinding device for a valve sleeve sealing cone surface comprises a processing table 1, a positioning plate 2 fixedly arranged on the processing table 1, a lower grinding head 21 having a conical grinding surface fixedly arranged at the center of the top of the positioning plate 2, a slave pulley 22 rotatably sleeved on the outer periphery of the lower grinding head 21, the slave pulley 22 forms a rotating pair with the positioning plate 2 through a bearing, an upper grinding head 3 arranged directly above the lower grinding head 21 and axially liftable, a reverse conical surface corresponding to the conical grinding surface of the lower grinding head 21 formed on the bottom surface of the upper grinding head 3, a coolant injection assembly arranged below the lower grinding head 21, and a dynamic clamping mechanism arranged on the top of the positioning plate 2.

[0021] When in use, the valve sleeve to be ground is gently placed on the lower grinding head 21, so that the center of the valve sleeve is roughly aligned with the center of the lower grinding head 21, and then, the upper grinding head 3 is started to slowly descend, and the valve sleeve is gradually pressed between the upper grinding head 3 and the lower grinding head 21. After confirming that the valve sleeve has been stably clamped, the power source driving the slave pulley 22 to rotate is started, so that the slave pulley 22 drives the valve sleeve to rotate. Since the upper grinding head 3 and the lower grinding head 21 have opposite conical grinding surfaces respectively, while the valve sleeve rotates, the upper grinding head 3 and the lower grinding head 21 will synchronously grind the double conical surfaces of the valve sleeve. This synchronous grinding method can ensure the accuracy and consistency of the double conical surfaces of the valve sleeve.

[0022] During the grinding process, turn on the switch of the coolant spray assembly to spray the coolant to the contact interface between the upper grinding head 3 and the valve sleeve. The coolant will then drip onto the contact area between the lower grinding head 21 and the valve sleeve to lubricate, cool and flush the grinding chips. This can not only improve the grinding quality and reduce heat accumulation during the grinding process, but also effectively extend the service life of the upper grinding head 3 and the lower grinding head 21.

[0023] Reference Figure 1 In the above technical solution, in order to realize the lifting function of the upper grinding head 3, an L-shaped mounting frame 4 is fixedly connected to the top of the processing table 1, and a vertical first driving part 41 is provided on the L-shaped mounting frame 4. The output end of the first driving part 41 is fixedly connected to a lifting block 42, and the lifting block 42 is fixedly connected to the top of the upper grinding head 3. When in use, the first driving part 41 using a cylinder as a power source is started, and the first driving part 41 will drive the lifting block 42 to perform a lifting movement. Since the lifting block 42 is fixedly connected to the upper grinding head 3, the lifting of the lifting block 42 will drive the upper grinding head 3 at the bottom thereof to lift together. In this way, by controlling the lifting of the upper grinding head 3, the upper grinding head 3 can cooperate with the lower grinding head 21 to contact the valve sleeve to start grinding, and the operation of detaching from the valve sleeve after the grinding is completed can be realized.

[0024] Reference Figure 1, To achieve the rotation function of the driven pulley 22, a horizontal mounting plate 7 is fixedly connected to one side of the processing table 1. A second driving part 71 is installed at the bottom of the horizontal mounting plate 7. The output end of the second driving part 71 is fixedly connected to a main pulley 72 located above the top of the horizontal mounting plate 7. A matching synchronous toothed belt 73 is connected between the main pulley 72 and the driven pulley 22. During use, the second driving part 71 powered by a servo motor is started. The second driving part 71 will drive the main pulley 72 to rotate. Since the main pulley 72 and the driven pulley 22 are connected by the synchronous toothed belt 73, the rotation of the main pulley 72 will drive the synchronous toothed belt 73 to move, thereby driving the driven pulley 22 to rotate on the top of the positioning disk 2. In this way, when the driven pulley 22 rotates, the valve sleeve clamped by the dynamic clamping mechanism can be synchronously ground between the upper grinding head 3 and the lower grinding head 21.

[0025] Referring to Figures 1-5 , The coolant spraying assembly includes L-shaped support rods 43 symmetrically fixed on both sides of the lifting block 42. The end of the L-shaped support rod 43 is fixedly connected to an annular flow divider 44. An annular liquid storage cavity 45 is provided inside the annular flow divider 44. A liquid infusion hose 46 communicating with the inside of the annular liquid storage cavity 45 is connected to the annular flow divider 44. A plurality of V-shaped spray pipes 47 evenly distributed at equal circumferential intervals are connected to the top of the annular flow divider 44. And the output end directions of the V-shaped spray pipes 47 are close to the contact interface between the upper grinding head 3 and the valve sleeve. During use, the liquid infusion hose 46 is connected to an external liquid infusion mechanism. The coolant transported by the external liquid infusion mechanism will enter the annular liquid storage cavity 45 through the liquid infusion hose 46. Subsequently, the coolant is divided from the annular liquid storage cavity 45 to each V-shaped spray pipe 47 and is sprayed to the contact interface between the upper grinding head 3 and the valve sleeve through the V-shaped spray pipes 47. Then the coolant will drop onto the part where the lower grinding head 21 contacts the valve sleeve along the trend.

[0026] Embodiment 2: Referring to Figures 2-7 , Considering that if the dynamic clamping mechanism adopts a structure of a single cylinder driving a clamping plate that fits the surface of the valve sleeve, although the clamping of the valve sleeve can be achieved, due to the driving response of the cylinder and the need for a certain time for action execution, it is difficult to accurately synchronize the clamping action with the downward pressing action of the upper grinding head 3 during the contact process of the valve sleeve, which results in an additional waiting time and thus reduces the grinding production efficiency. Therefore, on the basis of the above Embodiment 1, this design enables the dynamic clamping mechanism to automatically trigger radial clamping in response to the axial pressure when the valve sleeve is pressed between the upper grinding head 3 and the lower grinding head 21, and follows the rotation of the driven pulley 22 to drive the valve sleeve for double-cone surface synchronous grinding.

[0027] To achieve the above functions, the dynamic clamping mechanism includes a pair of L-shaped connecting rods 5 arranged above the pulley 22, the L-shaped connecting rod 5 is fixedly connected to a vertical fixing plate 6, the bottom of the vertical fixing plate 6 is fixedly connected to the top of the positioning plate 2, the interior of the L-shaped connecting rod 5 is provided with a first cavity 51 and a second cavity 52 that are interconnected, one end of the L-shaped connecting rod 5 is slidably connected to a vertical toggle rod 53, one end of the vertical toggle rod 53 is connected to a contact plate 54 corresponding to the bottom of the annular diverter 44, and the other end thereof is provided with a first elastic telescopic member located inside the first cavity 51, the first elastic telescopic member includes a first spring 57 located inside the first cavity 51, and the first spring 57 is An annular support block 58 is fixedly connected between one end and the inner wall of the first cavity 51, a first moving block 59 is fixedly connected between the other end of the first spring 57 and one end of the vertical toggle rod 53, and a transverse push rod 55 is slidably connected to the other end of the L-shaped connecting rod 5. The transverse push rod 55 has an arc-shaped clamping plate 56 fixedly connected to one end thereof, and a second elastic telescopic member located inside the second cavity 52 is provided at the other end thereof. The second elastic telescopic member includes a second spring 510 located inside the second cavity 52, one end of the second spring 510 is fixedly connected to the inner wall of the second cavity 52, and a second moving block 511 is fixedly connected between the other end of the second spring 510 and one end of the transverse push rod 55.

[0028] When in use, when the first driving part 41 of the cylinder drives the lifting block 42 to cooperate with the grinding head 3 to move the valve sleeve downward, the lifting block 42 will synchronously drive the annular diverter 44 connected to the end of the L-shaped support rod 43 to descend. When the annular diverter 44 slowly contacts the contact plate 54 and continues to move downward, the contact plate 54 is subjected to the downward pressure of the annular diverter 44, driving the first moving block 59 on the vertical toggle rod 53 to compress the first spring 57. As the first moving block 59 slides downward along the inner wall of the first chamber 51, the gas in the first chamber 51 is compressed and enters the second chamber 52, entering The gas entering the second chamber 52 exerts a squeezing effect on the second moving block 511, pulling the second spring 510 and driving the push rod 55 to move, so that the arc-shaped clamping plate 56 is tightly in contact with the surface of the valve sleeve. Through this ingenious design, with the help of the process of the upper grinding head 3 contacting the valve sleeve, the synchronous clamping of the valve sleeve is achieved. Moreover, the clamping mechanism and the rotation of the slave pulley 22 are independent of each other and work in coordination. The clamping action will not cause any interference to the rotation of the slave pulley 22, thereby ensuring the stability and processing accuracy of the valve sleeve during the grinding process, and greatly improving the production efficiency and product quality.

[0029] During the operation, special attention should be paid to the influence of the movement of the annular diverter 44 on the state of the arc-shaped clamping plate 56. When the annular diverter 44 moves downward, its bottom will press against the contact plate 54, causing the contact plate 54 to fit tightly against the top of the L-shaped connecting rod 5. This action will drive the vertical toggle lever 53 to move, and the first moving block 59 on the vertical toggle lever 53 compresses the first spring 57, resulting in the gas in the first chamber 51 being compressed and entering the second chamber 52. The gas entering the second chamber 52 exerts a squeezing effect on the second moving block 511, pulling the second spring 510 and driving the horizontal push rod 55 to move, so that the arc-shaped clamping plate 56 tightly contacts the surface of the valve sleeve, clamping the valve sleeve. At this time, the arc-shaped clamping plate 56 is in a fixed state and can stably hold the valve sleeve, ensuring that the valve sleeve does not shake during the grinding process, thus guaranteeing the grinding accuracy.

[0030] On the contrary, when the annular diverter 44 moves upward and gradually disengages from the surface of the contact plate 54, the vertical toggle lever 53 is no longer subjected to the downward pressing force of the annular diverter 44. At this time, the first spring 57 and the second spring 510 will return to their original states, and the first moving block 59 and the second moving block 511 will also return to their initial positions. The horizontal push rod 55 moves accordingly, and the arc-shaped clamping plate 56 no longer tightly contacts the surface of the valve sleeve and is in a movable state, facilitating the removal of the ground valve sleeve.

[0031] This design cleverly utilizes the change in the axial pressure borne by the upper grinding head 3. When the axial pressure borne by the upper grinding head 3 increases, the dynamic clamping mechanism will be automatically triggered to radially clamp the valve sleeve, ensuring that the valve sleeve remains stable during the grinding process and will not shift due to rotation or grinding force. Specifically, the upper grinding head 3 drives the annular diverter 44 to move up and down, and this action will automatically trigger the fixed and movable states of the arc-shaped clamping plate 56, without the need for additional operating steps to control the clamping and loosening of the clamping plate, thus simplifying the operation process, reducing manual intervention, and improving production efficiency.

[0032] Example 3: Refer to Figure 4 、 Figure 7 and Figure 8 Considering the operation of the upper grinding head 3 pressing against the top of the valve sleeve, in actual operation, since one end of the valve sleeve is pre-placed on the top of the lower grinding head 21, and before the upper grinding head 3 presses against the top of the valve sleeve, the valve sleeve is in a suspended state and requires the operator to continuously support it with the hand. This not only increases the burden on the operator but also reduces the grinding efficiency. More seriously, if the operator's hand slips, during the process of the upper grinding head 3 moving downward to press against the valve sleeve, it is very likely to cause injury to the hand, posing a relatively large safety hazard.

[0033] To effectively solve this problem, a positioning plate 8 is fixedly connected between two L-shaped connecting rods 5. A plugging hole 81 that fits the surface of the valve sleeve is carefully opened at the center of the surface of the positioning plate 8. When the valve sleeve needs to be ground, one end of the valve sleeve can be directly inserted into the plugging hole 81, and the valve sleeve can be preliminarily positioned and supported by means of the plugging hole 81. In this way, during the subsequent process of the grinding head 3 moving downward to abut against the top of the valve sleeve, the operator no longer needs to continuously support the valve sleeve with the hand, greatly reducing the burden on the operator. Through this design, not only the problems of low efficiency and potential safety hazards caused by the operator continuously supporting the valve sleeve are effectively solved, but also the overall performance and stability of the device are improved, providing a strong guarantee for the efficient and safe progress of the grinding operation.

[0034] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content by using the technical content prompted above to make equivalent embodiments of equivalent changes. However, as long as it does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A wet grinding device for the sealing conical surface of a valve sleeve, characterized in that, Comprising: A processing table (1); A positioning disk (2) fixedly arranged on the processing table (1), and a lower grinding head (21) with a conical grinding surface is fixedly arranged at the center of the top of the positioning disk (2); A driven pulley (22) rotatably sleeved on the outer periphery of the lower grinding head (21), and the driven pulley (22) forms a rotating pair with the positioning disk (2) through a bearing; An upper grinding head (3) arranged directly above the lower grinding head (21) and axially liftable, and a reverse conical surface corresponding to the conical grinding surface of the lower grinding head (21) is formed on the bottom surface of the upper grinding head (3); A coolant injection assembly arranged below the lower grinding head (21); and A dynamic clamping mechanism arranged on the top of the positioning disk (2), the dynamic clamping mechanism automatically triggers radial clamping in response to the axial pressure of the valve sleeve being pressed between the upper grinding head (3) and the lower grinding head (21), and drives the valve sleeve to perform synchronous double-conical surface grinding following the rotation of the driven pulley (22).

2. The wet grinding device for the valve sleeve sealing conical surface according to claim 1, characterized in that An L-shaped mounting bracket (4) is fixedly connected to the top of the processing table (1), a vertical first driving part (41) is arranged on the L-shaped mounting bracket (4), a lifting block (42) is fixedly connected to the output end of the first driving part (41), and the lifting block (42) is fixedly connected to the top of the upper grinding head (3).

3. The wet grinding device for the valve sleeve sealing conical surface according to claim 2, characterized in that, The coolant injection assembly includes L-shaped support rods (43) symmetrically and fixedly arranged on both sides of the lifting block (42), an annular flow divider (44) is fixedly connected to the end of the L-shaped support rod (43), an annular liquid storage cavity (45) is arranged inside the annular flow divider (44), an infusion hose (46) communicating with the inside of the annular liquid storage cavity (45) is communicated with the annular flow divider (44), a plurality of V-shaped injection pipes (47) evenly distributed circumferentially are communicated with the top of the annular flow divider (44), and the output end directions of the V-shaped injection pipes (47) are close to the contact interface between the upper grinding head (3) and the valve sleeve.

4. A wet grinding device for the sealing conical surface of a valve sleeve according to claim 3, characterized in that, The dynamic clamping mechanism includes a pair of L-shaped connecting rods (5) arranged above the driven pulley (22), a first cavity (51) and a second cavity (52) communicating with each other are arranged inside the L-shaped connecting rod (5), a vertical shifting rod (53) is slidably connected to one end of the L-shaped connecting rod (5), a resisting plate (54) corresponding to the bottom of the annular flow divider (44) is connected to one end of the vertical shifting rod (53), a first elastic telescopic member is arranged at the other end of the vertical shifting rod (53) inside the first cavity (51), a horizontal push rod (55) is slidably connected to the other end of the L-shaped connecting rod (5), an arc-shaped clamping plate (56) is fixedly connected to one end of the horizontal push rod (55), and a second elastic telescopic member is arranged at the other end of the horizontal push rod (55) inside the second cavity (52).

5. A wet grinding device for a valve sleeve sealing conical surface according to claim 4, characterized in that, A positioning plate (8) is fixedly connected between the two L-shaped connecting rods (5), and an insertion hole (81) fitting the surface of the valve sleeve is formed at the center of the surface of the positioning plate (8).

6. The wet grinding device for the valve sleeve sealing conical surface according to claim 4, characterized in that, The first elastic telescopic member comprises a first spring (57) located inside the first cavity (51), an annular support block (58) is fixedly connected between one end of the first spring (57) and the inner wall of the first cavity (51), a first moving block (59) is fixedly connected between the other end of the first spring (57) and one end of the vertical toggle rod (53), and the second elastic telescopic member comprises a second spring (510) located inside the second cavity (52), one end of the second spring (510) is fixedly connected to the inner wall of the second cavity (52), and a second moving block (511) is fixedly connected between the other end of the second spring (510) and one end of the horizontal push rod (55).

7. A wet grinding device for a valve sleeve sealing conical surface according to claim 4, characterized in that, A vertical fixing plate (6) is fixedly connected to the L-shaped connecting rod (5), and the bottom of the vertical fixing plate (6) is fixedly connected to the top of the positioning plate (2).

8. A wet grinding device for the sealing conical surface of a valve sleeve according to claim 4, characterized in that, When the annular flow diverter (44) moves downward to press the abutment plate (54) to fit against the top end of the L-shaped connecting rod (5), the arc-shaped clamping plate (56) is in a fixed state; when the annular flow diverter (44) moves upward to separate from the surface of the abutment plate (54), the arc-shaped clamping plate (56) is in an active state.

9. A wet grinding device for the sealing conical surface of a valve sleeve according to claim 8, characterized in that, A transverse mounting plate (7) is fixedly connected to one side of the processing table (1); a second driving unit (71) is installed at the bottom of the transverse mounting plate (7); an output end of the second driving unit (71) is fixedly connected to a main pulley (72) located above the top of the transverse mounting plate (7); and a matching synchronous toothed belt (73) is connected between the main pulley (72) and the slave pulley (22).

10. A grinding method for a wet grinding device of a valve sleeve sealing conical surface, applied to the wet grinding device of a valve sleeve sealing conical surface described in claim 1, characterized in that, include: Step S1, placing one end of the valve sleeve on the top of the lower grinding head (21), ensuring that the valve sleeve and the conical grinding surface of the lower grinding head (21) are initially aligned; Step S2, driving the upper grinding head (3) to move downward, as the upper grinding head (3) gradually moves downward and presses the valve sleeve, an axial pressure is generated between the upper grinding head (3) and the lower grinding head (21), and under the action of the axial pressure, the linkage dynamic clamping mechanism triggers radial clamping of the valve sleeve, so that the valve sleeve is firmly fixed, and then the slave pulley (22) is started to drive the valve sleeve clamped by the dynamic clamping mechanism to rotate between the upper grinding head (3) and the lower grinding head (21), and at the same time, the coolant spraying assembly is started, and the coolant is evenly sprayed onto the grinding area, so as to provide sufficient cooling and lubrication for the grinding process and ensure smooth grinding; Step S3: After the double-conical surface grinding of the valve sleeve is completed, the upper grinding head (3) is controlled to move upward, and the dynamic clamping mechanism loosens the clamping of the valve sleeve. At this time, the operator takes the ground valve sleeve out of the lower grinding head (21), completing the entire grinding process.

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