Special-shaped valve sealing surface machining clamp with supporting structure

Abstract

The invention belongs to the field of valve part machining, and provides a special-shaped valve sealing face machining clamp with a supporting structure, the special-shaped valve sealing face machining clamp comprises an annular pipeline, fixing mechanisms are arranged on the two sides of the annular pipeline, and each fixing mechanism comprises an annular mounting frame; a plurality of structural grooves are formed in one side of the annular mounting frame in the circumferential direction of the annular mounting frame; according to the flexible clamping fixture, a pneumatic driving flexible clamping mode is adopted, the clamping process is more stable, force application is uniform, tiny part deformation caused by too large local pressure of a traditional rigid fixture is avoided, the flatness and the sealing performance of the machined part are improved, the product defect rate is reduced, meanwhile, the fixture has good self-adaptive capacity, and the machining efficiency is improved. The clamping point distribution can be automatically adjusted according to special-shaped sealing surface parts in different shapes, the clamping stability and reliability are enhanced, the part displacement or looseness phenomenon caused by infirm clamping is reduced, and the machining precision and consistency are improved.

Description

Technical Field

[0001] The invention belongs to the field of valve parts processing, in particular to a special-shaped valve sealing surface processing fixture with a supporting structure. Background Art

[0002] In the field of valve manufacturing, the special-shaped valve sealing surface processing fixture is a key auxiliary tool, which is mainly used to firmly clamp the special-shaped valve sealing surface parts during the processing to ensure the processing accuracy and quality. The valve is an important component in the fluid control system, and its sealing performance directly affects the reliability and safety of the entire system. The special-shaped valve sealing surface has a unique shape and is difficult to process, and the requirements for the fixture are more stringent. The special-shaped valve sealing surface processing fixture occupies an important position in the valve manufacturing industry. As a key auxiliary equipment in the processing process, its performance and quality have a decisive influence on the processing accuracy and overall quality of the valve sealing surface.

[0003] Existing universal clamps are often not suitable for use with special-shaped valve sealing surface parts due to the special shapes of these parts. These parts have irregular shapes, and it is difficult for universal clamps to achieve stable clamping. Parts are prone to loosening and displacement during the processing, resulting in the inability to guarantee processing accuracy. Moreover, since the hardness of sealing surface parts varies, overly rigid clamps will exert excessive pressure on the parts to a certain extent during the clamping process, causing slight deformation of the parts. Although this deformation may be within the range that is difficult to detect with the naked eye, it is enough to affect the flatness and sealing performance of the sealing surface, thereby increasing the defect rate in part production. These problems directly lead to reduced processing efficiency, increased operational complexity, and difficulty in meeting high-precision, high-quality production requirements.

[0004] Therefore, those skilled in the art have proposed a special-shaped valve sealing surface machining fixture with a support structure to solve the problems raised in the background art. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a special-shaped valve sealing surface processing fixture with a support structure to solve the problems in the prior art that general fixtures are difficult to achieve stable clamping when facing irregular parts. At the same time, due to the different hardness of sealing surface parts, an overly rigid fixture will, to a certain extent, exert excessive pressure on the parts during the clamping process, thereby causing slight deformation of the parts.

[0006] A special-shaped valve sealing surface processing fixture with a support structure includes an annular pipe, and fixing mechanisms are provided on both sides of the annular pipe. The fixing mechanisms include an annular mounting frame, and a plurality of structural grooves are opened on one side of the annular mounting frame along the circumference of the annular mounting frame.

[0007] The inner cavity of the structural groove is provided with a reset mechanism, and the reset mechanism includes a mounting box. The inner cavity of the mounting box is horizontally provided with a cross bar, one side of the cross bar is fixedly connected to a long rod, and one end of the long rod passes through the inner wall of the adjacent mounting box and is fixedly connected to a round block;

[0008] A buffer clamping mechanism is provided on one side of the inner cavity of the installation box, and the buffer clamping mechanism includes a sealed shell. A connecting groove is provided on one side of the sealed shell, and inner grooves are provided on both sides of the inner wall of the connecting groove. A guide groove is provided on the inner wall of one side of the inner groove, and a force-bearing rod is slidably connected to the inner cavity of the guide groove.

[0009] Preferably, side rods are fixedly connected to both sides of the outer wall of one side of the cross bar, a slider is fixedly connected to one side of the side rod, sliding grooves adapted to the slider are provided on both sides of the inner walls of the installation box, and a storage groove adapted to the round block is provided on one side of the installation box.

[0010] Preferably, a first damper is fixedly connected to both sides of the inner wall of one side of the installation box, and the other end of the first damper is fixedly connected to one side of an adjacent cross bar. The outer ring of the first damper is provided with a first spring, one end of the first spring is fixedly connected to the inner wall of the adjacent installation box, and the other end of the first spring is fixedly connected to one side of the adjacent cross bar.

[0011] Preferably, the bottom of the sealed shell is fixedly connected to the bottom of the inner cavity of the adjacent installation box, and one side of the sealed shell is fixedly connected to the inner wall of the adjacent installation box. The top of the sealed shell is fixedly connected to an input pipe, the top of the input pipe passes through the top of the inner cavity of the adjacent installation box and is fixedly connected to the annular pipe, and the inner cavity of the input pipe is connected to the inner cavity of the annular pipe.

[0012] Preferably, a primary input hole is provided at the top of the sealed shell, and a secondary input hole is provided at the bottom of the inner cavity of the primary input hole, the inner cavity of the input tube is connected to the inner cavity of the adjacent primary input hole, the inner cavity of the secondary input hole is connected to the adjacent connecting groove, and the inner diameter of the primary input hole is larger than the inner diameter of the secondary input hole.

[0013] Preferably, the outer ring of the stress-bearing rod is sleeved with a plurality of rubber rings, the outer rings of the rubber rings fit with the inner surface walls of the corresponding guide grooves, and one end of the stress-bearing rod is fixedly connected with a transmission block.

[0014] Preferably, one end of the transmission block is fixedly connected to a rubber pad, and the two transmission blocks are fixedly connected via a connecting rod.

[0015] Preferably, both sides of the sealed housing are fixedly connected to limit blocks, one side of the limit block is fixedly connected to a second damper, one end of the second damper is fixedly connected to a connecting rod, and one end of the connecting rod is fixedly connected to one side of the adjacent transmission block.

[0016] Preferably, the outer ring of the second damper is provided with a second spring, one end of the second spring is fixedly connected to one side of the adjacent limit block, and the other end of the second spring is fixedly connected to one side of the adjacent connecting rod.

[0017] Preferably, both sides of the annular pipe are respectively fixedly connected to one side of an adjacent annular mounting frame, one side of the outer ring of the annular pipe is fixed and connected to an inflation pipe, the other side of the outer ring of the annular pipe is fixed and connected to an air release pipe, the outer ring of the annular pipe is fixedly connected to a plurality of one-way pressure relief valves, both sides of the annular pipe are fixedly connected to mounting blocks, one side of the mounting block is provided with a plurality of screw holes, and the outer rings of the inflation pipe and the air release pipe are fixedly connected to solenoid valves.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts a pneumatically driven flexible clamping method to make the clamping process smoother and the force applied evenly, avoiding the slight deformation of parts caused by excessive local pressure in traditional rigid clamps, thereby improving the flatness and sealing performance of parts after processing and reducing the product defect rate. At the same time, the clamp has good adaptive ability and can automatically adjust the distribution of clamping points according to the different shapes of special-shaped sealing surface parts, thereby enhancing the stability and reliability of clamping, reducing the displacement or loosening of parts caused by loose clamping, and improving processing accuracy and consistency.

[0020] 2. Through the setting of the buffer clamping mechanism, the present invention can achieve a smoother and more uniform force application process when clamping the special-shaped valve sealing surface parts, effectively avoiding the problem of surface damage or slight deformation of parts caused by instantaneous impact force in traditional rigid clamping methods. The mechanism provides moderate buffering resistance when the clamping action is started through the synergy between the force-bearing rod, rubber ring, transmission block, second damper and second spring, so that the clamping component can slowly and steadily contact the part surface, thereby improving the flexibility and safety of the clamping. At the same time, the connection structure between the rubber pad and the connecting rod enhances the uniform distribution of the clamping force, prevents local stress concentration, and further ensures the integrity and processing accuracy of the parts. In addition, in the deflation reset stage, the second spring can drive the relevant components to return quickly, thereby improving operational efficiency. Overall, the application of the buffer clamping mechanism not only improves the adaptability of the clamp to special-shaped parts, but also enhances the clamping stability and repeatable positioning accuracy, meeting the requirements of high-precision and high-quality processing.

[0021] 3. Through the setting of the reset mechanism, the present invention can realize fast, stable and automatic reset operation of the clamp after completing the clamping operation, thereby improving the use efficiency and operational reliability of the equipment. The mechanism cooperates with the cross bar, side bar, slider, first damper and first spring. After the exhaust pipe is exhausted and the pressure is reduced, the elastic restoring force of the first spring drives the cross bar and related clamping components to smoothly return to the initial position. At the same time, the first damper effectively suppresses the impact and vibration during the reset process, and prevents structural damage or positioning deviation caused by too fast reset or rebound. The guiding structure of the slider and the slide groove further ensures the smoothness and directionality of the movement during the reset process, and avoids the occurrence of offset and jamming. Overall, the reset mechanism not only simplifies the operating process and reduces the need for manual intervention, but also improves the reuse accuracy and service life of the clamp, providing strong support for efficient and continuous processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the inflation tube of the present invention;

[0024] Figure 3 It is a schematic diagram of the structural groove structure of the present invention;

[0025] Figure 4 This is a schematic structural diagram of the installation box of the present invention;

[0026] Figure 5 This is a schematic diagram of the chute structure of the present invention;

[0027] Figure 6 This is a schematic structural diagram of the sealed housing of the present invention;

[0028] Figure 7 Schematic diagram of the connecting rod structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the inner tank structure of the present invention;

[0030] Figure 9 It is a schematic diagram of the connecting groove structure of the present invention.

[0031] In the figure: 1, annular pipe; 2, fixing mechanism; 201, annular mounting frame; 202, structural groove; 3, mounting block; 4, inflation tube; 5, one-way pressure relief valve; 6, air relief tube; 7, screw hole; 8, reset mechanism; 801, mounting box; 802, slide groove; 803, storage groove; 804, first damper; 805, first spring; 806, side rod; 807, cross rod; 808, slider; 809, long rod; 810, Round block; 9, buffer clamping mechanism; 901, sealed shell; 902, input pipe; 903, limit block; 904, second damper; 905, second spring; 906, connecting rod; 907, connecting rod; 908, transmission block; 909, rubber pad; 910, rubber ring; 911, primary input hole; 912, secondary input hole; 913, connecting groove; 914, inner groove; 915, guide groove; 916, force-bearing rod. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0033] As attached Figure 1 To the attached Figure 9 As shown:

[0034] Embodiment 1: The present invention provides a special-shaped valve sealing surface processing fixture with a support structure, comprising an annular pipe 1, with fixing mechanisms 2 provided on both sides of the annular pipe 1, the fixing mechanisms 2 comprising an annular mounting frame 201, and a plurality of structural grooves 202 formed on one side of the annular mounting frame 201 and along the circumference of the annular mounting frame 201;

[0035] The inner cavity of the structural groove 202 is provided with a reset mechanism 8, which includes a mounting box 801. A horizontal bar 807 is horizontally provided in the inner cavity of the mounting box 801. A long rod 809 is fixedly connected to one side of the horizontal bar 807, and one end of the long rod 809 passes through the inner wall of the adjacent mounting box 801 and is fixedly connected to a round block 810.

[0036] A buffer clamping mechanism 9 is provided on one side of the inner cavity of the installation box 801, and the buffer clamping mechanism 9 includes a sealed shell 901. A connecting groove 913 is provided on one side of the sealed shell 901, and inner grooves 914 are provided on both sides of the inner walls of the connecting groove 913. A guide groove 915 is provided on the inner wall of one side of the inner groove 914, and a force-bearing rod 916 is slidably connected to the inner cavity of the guide groove 915.

[0037] Side bars 806 are fixedly connected to both sides of the outer wall of one side of the cross bar 807, and a slider 808 is fixedly connected to one side of the side bar 806. The inner walls on both sides of the installation box 801 are provided with sliding grooves 802 that are compatible with the slider 808, and one side of the installation box 801 is provided with a storage groove 803 that is compatible with the round block 810.

[0038] As can be seen from the above, the personnel first use bolts to fix the screw holes 7 on the mounting block 3 to the workbench to ensure that the fixture as a whole remains stable during the processing, and then connect the output end of the pressurizing device to the inflation tube 4 through a hose to provide a power source for the subsequent clamping action; then, the operator places the special-shaped valve sealing surface part to be processed horizontally in the inner cavity of the fixture, ready for clamping and positioning; after that, the pressurizing device is controlled to inflate the inside of the annular pipe 1, and after the gas enters the annular pipe 1 in turn, it flows into the primary input hole 911 and the secondary input hole 912 respectively through several input pipes 902. Since the inner diameter of the primary input hole 911 is larger than that of the secondary input hole 912, the gas will be inflated before entering the connecting groove 913. After a pressurization process, the response speed and stability of the subsequent clamping action are improved; the gas continues to flow into the adjacent inner groove 914, pushing the force-bearing rod 916 in the guide groove 915 to move outward, and the rubber ring 910 provided on the outer ring of the force-bearing rod 916 undergoes elastic deformation under the action of gas pressure, and drives the force-bearing rod 916 to move along the direction of the guide groove 915, thereby making the rubber pad 909 connected to the force-bearing rod 916 physically contact with the cross bar 807, pushing the cross bar 807 and the long rod 809 connected to it to move outward together; the displacement of the long rod 809 drives the round block 810 to approach and fit the outer wall of the special-shaped valve sealing surface part, thereby realizing multi-point uniform clamping of the part; in this process, the transmission block 908 moves along with the force-bearing rod The force rod 916 moves synchronously and is affected by the resistance provided by the second damper 904 and the second spring 905, so that its initial displacement speed is effectively controlled, thereby playing a buffering role, avoiding damage to the surface of the part or unstable clamping due to excessive clamping; at the same time, the matching structure between the slider 808 and the slide groove 802 ensures the stability and guiding accuracy of the cross bar 807 during the movement, preventing uneven clamping or failure due to offset; when the clamp completes the clamping task, the operator controls the solenoid valve on the air release pipe 6 to open, so that the internal gas of the annular pipe 1 is discharged through the air release pipe 6. As the air pressure drops, the first damper 804 and the first spring 805 work together to drive the cross bar 807, the long rod 809 and the round block. 810 is reset to its original position. At the same time, the second damper 904 and the second spring 905 also push the force-bearing rod 916 and its related components to return to their initial state. The entire clamping and releasing process is thus completed. The pneumatic drive system composed of the annular pipe 1, the input pipe 902, the first-level input hole 911 and the second-level input hole 912, combined with the linkage structure of the force-bearing rod 916, the guide groove 915, the rubber ring 910 and the rubber pad 909, realizes the flexible clamping of the special-shaped valve sealing surface parts. Compared with the traditional rigid clamp, the present device does not apply excessive pressure to the parts during the clamping process, thereby effectively avoiding the problem of part deformation caused by excessive clamping force, and improving the dimensional consistency and surface integrity of the parts after processing;Secondly, the distribution design of multiple force-bearing rods 916 and round blocks 810 can automatically adapt the clamping points according to the shape of special-shaped parts, overcoming the technical defect that general-purpose clamps are difficult to adapt to complex shapes, making the clamp more adaptable and flexible, and further improving clamping stability and reliability. In addition, the buffering mechanism of the second damper 904 and the second spring 905 not only optimizes the smoothness of the clamping process, but also reduces the risk of part damage caused by clamping impact. At the same time, the guiding structure of the slider 808 and the slide groove 802 enhances the balance of the crossbar 807 during movement, improving the stability and repeatability of the clamp's overall operation. Finally, after clamping is completed, the air is exhausted through the vent pipe 6 and the reset mechanism of the first damper 804, the first spring 805, and the second damper 904 and the second spring 905 allows the various components of the clamp to quickly and smoothly return to their initial state, facilitating the next round of clamping operations. This significantly improves the efficiency and automation of the clamp and meets the modern industry's demand for high-precision, high-efficiency, and high-quality valve sealing surface part processing.

[0039] Example 2: This example is basically the same as the previous example, except that a first damper 804 is fixedly connected to both sides of the inner wall of one side of the installation box 801, and the other end of the first damper 804 is fixedly connected to one side of an adjacent cross bar 807, and the outer ring of the first damper 804 is provided with a first spring 805, one end of the first spring 805 is fixedly connected to the inner wall of the adjacent installation box 801, and the other end of the first spring 805 is fixedly connected to one side of the adjacent cross bar 807.

[0040] The bottom of the sealed shell 901 is fixedly connected to the bottom of the inner cavity of the adjacent installation box 801, and one side of the sealed shell 901 is fixedly connected to the inner wall of the adjacent installation box 801. The top of the sealed shell 901 is fixedly connected to the input pipe 902, and the top of the input pipe 902 passes through the top of the inner cavity of the adjacent installation box 801 and is fixedly connected to the annular pipe 1. The inner cavity of the input pipe 902 is connected to the inner cavity of the annular pipe 1.

[0041] A primary input hole 911 is provided at the top of the sealed shell 901, and a secondary input hole 912 is provided at the bottom of the inner cavity of the primary input hole 911. The inner cavity of the input tube 902 is connected to the inner cavity of the adjacent primary input hole 911, and the inner cavity of the secondary input hole 912 is connected to the adjacent connecting groove 913. The inner diameter of the primary input hole 911 is larger than the inner diameter of the secondary input hole 912.

[0042] The outer ring of the force-bearing rod 916 is sleeved with a plurality of rubber rings 910 , and the outer rings of the rubber rings 910 fit in contact with the inner surface walls of the corresponding guide grooves 915 . One end of the force-bearing rod 916 is fixedly connected to the transmission block 908 .

[0043] As can be seen from the above, through the arrangement of the cross bar 807, the side bar 806, the slider 808, the slide 802 and the receiving groove 803, during the clamping process, when the gas pushes the force-bearing rod 916 to drive the transmission mechanism to move, the cross bar 807 moves smoothly under the guidance of the slider 808 and the slide 802, avoiding uneven clamping or jamming due to offset; at the same time, the receiving groove 803 provides space for the round block 810 to avoid it from being smoothly retracted when it is reset, thereby improving the stability of the clamping process and the operation of the structure. The effect of smoothness is achieved by setting the first damper 804 and the first spring 805. During the deflation reset stage, the first spring 805 provides a restoring force to make the cross bar 807 return to its initial position, while the first damper 804 plays a role in buffering and deceleration, preventing the cross bar 807 from resetting too quickly and causing impact or rebound, thereby ensuring the stable reset of the clamp component and extending its service life. The connection between the sealed housing 901, the input pipe 902 and the annular pipe 1 allows the gas to be stably discharged from the annular pipe. Gas is transmitted through channel 1 to the interior of sealed housing 901, providing a power source for subsequent clamping actions. The fixed connection between the structures ensures the sealing and reliability of the entire system, thereby improving gas transmission efficiency and system stability. Through the arrangement of primary input hole 911, secondary input hole 912, and connecting groove 913, after entering sealed housing 901, gas first passes through primary input hole 911 and then flows into secondary input hole 912 with a smaller inner diameter, thereby forming a secondary pressurization. This increases the driving force of the gas pressure on the force-bearing rod 916, making the clamping response more rapid and powerful, thereby enhancing the sensitivity and execution of the clamping action. Through the arrangement of force-bearing rod 916, rubber ring 910, guide groove 915, and transmission block 908, during the clamping process, the rubber ring 910 not only strengthens the sealing between the force-bearing rod 916 and guide groove 915 to prevent gas leakage, but also acts as a shock absorber, reducing movement friction and noise, thereby improving the stability of the clamping process and reducing wear.

[0044] Embodiment 3: This embodiment is basically the same as the previous embodiment, except that a rubber pad 909 is fixedly connected to one end of the transmission block 908 , and the two transmission blocks 908 are fixedly connected via a connecting rod 907 .

[0045] The sealing shell 901 is fixedly connected to both sides with a limit block 903, one side of the limit block 903 is fixedly connected to a second damper 904, and one end of the second damper 904 is fixedly connected to a connecting rod 906, and one end of the connecting rod 906 is fixedly connected to one side of the adjacent transmission block 908.

[0046] The outer ring of the second damper 904 is provided with a second spring 905 , one end of the second spring 905 is fixedly connected to one side of the adjacent limit block 903 , and the other end of the second spring 905 is fixedly connected to one side of the adjacent connecting rod 906 .

[0047] The two sides of the annular pipe 1 are respectively fixedly connected to one side of the adjacent annular mounting frame 201, one side of the outer ring of the annular pipe 1 is fixed and connected to the inflation pipe 4, the other side of the outer ring of the annular pipe 1 is fixed and connected to the deflation pipe 6, the outer ring of the annular pipe 1 is fixedly connected to several one-way pressure relief valves 5, both sides of the annular pipe 1 are fixedly connected to the mounting blocks 3, one side of the mounting blocks 3 is provided with several screw holes 7, the outer rings of the inflation pipe 4 and the deflation pipe 6 are fixedly connected to solenoid valves.

[0048] As can be seen from the above, through the arrangement of the transmission block 908, the rubber pad 909 and the connecting rod 907, the rubber pad 909 provides a flexible buffer when contacting the cross bar 807, avoiding the impact damage caused by the hard collision of metals, and the connecting rod 907 ensures that the two transmission blocks 908 move synchronously, thereby improving the coordination and consistency of the clamping action, thereby reducing the risk of part damage and improving the clamping accuracy. Through the arrangement of the limit block 903, the second damper 904, the connecting rod 906 and the transmission block 908, at the initial stage of clamping, the second damper 904 exerts resistance to the displacement of the transmission block 908, causing it to start slowly, effectively preventing excessive clamping from causing deformation or damage to the parts, thereby achieving the effect of controlling the clamping force and improving the flexibility of clamping. The second spring 905 is set up, and in the deflation reset stage, the second spring 905 provides a reset tension to make the transmission block 908 and related components quickly return to the initial position, while the second damper 904 suppresses the rebound speed in this process to prevent the components from vibrating or dislocating due to over-rapid reset, thereby achieving the effect of improving the reset stability and the efficiency of the clamp. Through the setting of the annular pipe 1, the inflation pipe 4, the deflation pipe 6, the one-way pressure relief valve 5, the mounting block 3, the screw hole 7 and the solenoid valve, the structure realizes the centralized air supply and pressure relief control of the clamp, which is convenient for automated operation; the one-way pressure relief valve 5 can automatically exhaust to protect the safety of the system when overpressure occurs, and the mounting block 3 and the screw hole 7 facilitate the rapid installation of the clamp on the workbench, thereby achieving the effect of improving the safety, maintainability and installation convenience of the clamp.

[0049] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fixture for machining a special-shaped valve sealing surface with a supporting structure, comprising an annular pipe (1), characterized in that: Both sides of the annular pipe (1) are provided with fixing mechanisms (2), the fixing mechanisms (2) comprising an annular mounting frame (201), and a plurality of structural grooves (202) are provided on one side of the annular mounting frame (201) and along the circumferential direction of the annular mounting frame (201); The inner cavity of the structural groove (202) is provided with a reset mechanism (8), and the reset mechanism (8) includes a mounting box (801). The inner cavity of the mounting box (801) is horizontally provided with a crossbar (807), one side of the crossbar (807) is fixedly connected to a long rod (809), and one end of the long rod (809) passes through the inner wall of the adjacent mounting box (801) and is fixedly connected to a round block (810); A buffer clamping mechanism (9) is provided on one side of the inner cavity of the installation box (801), and the buffer clamping mechanism (9) includes a sealed shell (901). A connecting groove (913) is provided on one side of the sealed shell (901), and inner grooves (914) are provided on both sides of the inner wall of the connecting groove (913). A guide groove (915) is provided on one inner wall of the inner groove (914), and a force-bearing rod (916) is slidably connected to the inner cavity of the guide groove (915).

2. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 1, characterized in that: The outer wall of one side of the cross bar (807) is fixedly connected to a side bar (806) on both sides, and a slider (808) is fixedly connected to one side of the side bar (806). The inner walls of both sides of the installation box (801) are provided with a sliding groove (802) adapted to the slider (808), and a storage groove (803) adapted to the round block (810) is provided on one side of the installation box (801).

3. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 2, characterized in that: A first damper (804) is fixedly connected to both sides of the inner wall of one side of the installation box (801), and the other end of the first damper (804) is fixedly connected to one side of an adjacent cross bar (807). The outer ring of the first damper (804) is provided with a first spring (805), one end of the first spring (805) is fixedly connected to the inner wall of the adjacent installation box (801), and the other end of the first spring (805) is fixedly connected to one side of the adjacent cross bar (807).

4. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 1, characterized in that: The bottom of the sealing shell (901) is fixedly connected to the bottom of the inner cavity of the adjacent installation box (801), and one side of the sealing shell (901) is fixedly connected to the inner wall of the adjacent installation box (801). The top of the sealing shell (901) is fixedly connected to an input pipe (902). The top of the input pipe (902) passes through the top of the inner cavity of the adjacent installation box (801) and is fixedly connected to the annular pipe (1). The inner cavity of the input pipe (902) is in communication with the inner cavity of the annular pipe (1).

5. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 4, characterized in that: A primary input hole (911) is provided at the top of the sealed housing (901), and a secondary input hole (912) is provided at the bottom of the inner cavity of the primary input hole (911). The inner cavity of the input pipe (902) is connected to the inner cavity of the adjacent primary input hole (911), and the inner cavity of the secondary input hole (912) is connected to the adjacent connecting groove (913). The inner diameter of the primary input hole (911) is larger than the inner diameter of the secondary input hole (912).

6. The fixture for machining the sealing surface of a special-shaped valve with a support structure according to claim 1, characterized in that: The outer ring of the force-bearing rod (916) is sleeved with a plurality of rubber rings (910), and the outer ring of the rubber ring (910) fits with the inner surface wall of the corresponding guide groove (915). One end of the force-bearing rod (916) is fixedly connected to a transmission block (908).

7. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 6, characterized in that: One end of the transmission block (908) is fixedly connected to a rubber pad (909), and the two transmission blocks (908) are fixedly connected via a connecting rod (907).

8. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 7, characterized in that: Both sides of the sealed housing (901) are fixedly connected to a limit block (903), one side of the limit block (903) is fixedly connected to a second damper (904), one end of the second damper (904) is fixedly connected to a connecting rod (906), and one end of the connecting rod (906) is fixedly connected to one side of an adjacent transmission block (908).

9. A fixture for machining a special-shaped valve sealing surface with a support structure as claimed in claim 8, characterized in that: The outer ring of the second damper (904) is provided with a second spring (905), one end of the second spring (905) is fixedly connected to one side of the adjacent limit block (903), and the other end of the second spring (905) is fixedly connected to one side of the adjacent connecting rod (906).

10. The fixture for machining a special-shaped valve sealing surface with a support structure according to claim 1, characterized in that: The two sides of the annular pipe (1) are respectively fixedly connected to one side of the adjacent annular mounting frame (201); one side of the outer ring of the annular pipe (1) is fixedly connected to and communicated with an inflation pipe (4); the other side of the outer ring of the annular pipe (1) is fixedly connected to and communicated with an air release pipe (6); the outer ring of the annular pipe (1) is fixedly connected to a plurality of one-way pressure relief valves (5); both sides of the annular pipe (1) are fixedly connected to mounting blocks (3); a plurality of screw holes (7) are provided on one side of the mounting block (3); and the outer rings of the inflation pipe (4) and the air release pipe (6) are fixedly connected to solenoid valves.

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