A valve body sealing surface surfacing apparatus and method of use

Abstract

The present application relates to valve processing equipment technical field, specifically disclose a kind of valve body sealing surface surfacing equipment and use method, including bottom plate, installation disc is installed on the bottom plate, installation disc side is rotatably provided with for the surfacing of valve body sealing surface and is welded surfacing mechanism.The height of the surfacing machine is adjusted to the appropriate distance by the up and down sliding of the sliding plate on the sliding rail, and the height of the surfacing machine is stopped after adjustment, which can facilitate the adjustment of the height of the transverse plate, and further facilitate the adjustment of the height of the carrier plate and the surfacing machine.The height of the welding torch of the surfacing machine can be adjusted to the appropriate distance according to the specification and model of the sealing surface of the valve body to be surfacing processed, so that the welding torch of the surfacing machine is at an appropriate distance from the sealing surface of the valve body, and the diameter of the surfacing machine for surfacing the sealing surface of the valve body can be adjusted, so that the device can be suitable for valve bodies of different specifications and models.

Description

TECHNICAL FIELD

[0001] The present application relates to valve processing equipment technical field, especially to a valve body sealing surface surfacing equipment and method. BACKGROUND

[0002] Valve is a mechanical device for controlling the flow, flow direction, pressure, temperature, etc. of fluid medium, and valve is a basic component in pipeline system. Valve fittings are often discussed as a separate category in technology as pumps.

[0003] The sealing surface is a key part of the valve. Surfacing a layer of hard alloy on the sealing surface of the valve can effectively improve the hardness, wear resistance and corrosion resistance of the sealing surface of the valve, prolong the service life of the valve, and prevent leakage. Usually, surfacing is completed by manual work, and the surfacing quality depends on the manual welding level. Usually, a surfacing machine is used to surfacing the sealing surface of the valve body. For example, a valve surfacing machine is disclosed in Chinese patent application No. 201420215017.4, which comprises a lower fixed frame, a stepper motor and a controller, a rotating wheel and left and right clamping blocks. The controller is in control connection with the stepper motor, and the stepper motor is in transmission connection with the rotating wheel to control the rotation of the rotating wheel. The rotating wheel is fixedly connected with the left and right clamping blocks through a first connecting plate. The shape of the rotating wheel matches the shape of the valve disc mounting hole. The valve is fixed on the rotating wheel. One end of the left and right clamping blocks clamps the valve body, and the other end is fixed with the first connecting plate through a fastening bolt. When welding a center hole on one side, the controller is started to control the stepper motor to rotate, thereby driving the valve to rotate and welding a center hole on the other side. By setting the valve fixing mechanism and the automatic rotating mechanism, the manual participation is reduced, and the production efficiency and safety are improved. SUMMARY

[0004] The present application aims at solving the problems in the prior art and provides a valve body sealing surface surfacing equipment and method.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A valve body sealing surface surfacing equipment, including a base plate, the base plate is installed with mounting disc, the side of mounting disc is rotationally provided with surfacing mechanism for surfacing the valve body sealing surface, the mounting disc is provided with fixing mechanism for fixing the valve;

[0007] The surfacing mechanism includes an annular guide rail mounted on the side of the mounting disc, an electric sliding block is rotatably mounted on the guide rail, and a surfacing assembly for surfacing the valve body sealing surface is mounted on the side of the electric sliding block.

[0008] Preferably, the surfacing assembly includes a second fixing plate mounted on the side of the electric sliding block, a first sliding rod mounted on the side of the second fixing plate, a third fixing plate slidably connected to the first sliding rod, a horizontal plate slidably mounted on the side of the third fixing plate, and a surfacing machine mounted on the side of the horizontal plate for surfacing the valve body sealing surface.

[0009] Preferably, the third fixing plate is provided with a sliding rail on the side thereof, and a sliding plate is slidably mounted on the sliding rail, the horizontal plate is fixed on the side of the sliding plate, a locking bolt is inserted into the sliding plate, and the end of the locking bolt abuts against the sliding rail.

[0010] Preferably, the horizontal plate is provided with a bearing plate on the side thereof, and the surfacing machine is mounted on the bearing plate.

[0011] Preferably, the mounting disc is provided with a sliding rod on the side thereof, the sliding rod is coaxial with the guide rail, a sliding sleeve is slidably sleeved on the sliding rod, a fixing rod is fixed on the outer wall of the sliding sleeve, a rectangular plate is connected to the end of the fixing rod, a second sliding rod is mounted on the side of the rectangular plate, and a sliding groove is formed in the bottom of the bearing plate.

[0012] Preferably, the mounting disc is provided with a sliding ring on the side thereof, the sliding ring is coaxial with the guide rail, the sliding ring is located in the inner ring of the guide rail, the sliding rod is located in the inner ring of the sliding ring, a sliding block is slidably mounted on the sliding ring, a second electric telescopic rod is mounted on the side of the sliding block, and the piston rod of the second electric telescopic rod is fixed to the side of the fixing rod.

[0013] Preferably, the sliding block is provided with a first fixing plate on the side thereof, the second electric telescopic rod is mounted on the side of the first fixing plate, the piston rod of the second electric telescopic rod is fixed with a reinforcing block, and the reinforcing block is fixed to the side of the fixing rod.

[0014] Preferably, a limiting block is mounted on the end of the sliding rod, a supporting rod is mounted on the side of the mounting disc away from the guide rail, the end of the supporting rod is fixed to the top of the base plate, and two groups of fixing holes are symmetrically formed in the base plate.

[0015] Preferably, the fixing mechanism comprises a second fixing block mounted on the top of the mounting disc, a first fixing block fixed on the bottom plate, the mounting disc is mounted on the first fixing block, the top of the second fixing block is connected with the top plate through the connecting plate, the bottom of the top plate is provided with the first electric telescopic rod, the piston rod tail of the first electric telescopic rod is fixedly connected with the third fixing block, the fourth fixing block is fixed on the bottom plate and located directly below the third fixing block, the opposite surfaces of the third fixing block and the fourth fixing block are both provided with arc-shaped grooves matched with the outer wall of the valve body of the valve, the bottom of the top plate is provided with the collecting box, and the dust collector is mounted on the top plate and communicates with the collecting box.

[0016] The application discloses a valve body sealing surface surfacing equipment and a use method thereof.

[0017] S1: first, the valve body to be surfacing is placed between the third fixing block and the fourth fixing block, the first electric telescopic rod is started, the piston rod of the first electric telescopic rod pushes the third fixing block to move downward to press and fix the valve body, and the valve body is fixed between the third fixing block and the fourth fixing block.

[0018] S2: the second electric telescopic rod is started, the piston rod of the second electric telescopic rod pushes the fixing rod to move to be close to the valve body, so that the surfacing machine is close to the valve body, and the surfacing machine is stopped until the distance between the welding gun of the surfacing machine and the sealing surface of the valve body reaches a preset distance.

[0019] S3: the two groups of locking bolts are loosened, the sliding plate is slid up and down on the sliding rail to adjust the height of the surfacing machine, and the height of the surfacing machine is stopped after being adjusted to a proper distance.

[0020] S4: at present, the surfacing machine is started, and the electric sliding block is started at the same time, the electric sliding block slides on the guide rail, and the sealing surface of the valve body is surfacing treated by the surfacing machine.

[0021] Compared with the prior art, the application has the beneficial effects that:

[0022] 1: in the application, the sliding plate is slid up and down on the sliding rail to adjust the height of the surfacing machine, the height of the surfacing machine is stopped after being adjusted to a proper distance, the height of the horizontal plate can be adjusted, the height of the bearing plate and the surfacing machine can be adjusted, the height of the welding gun of the surfacing machine can be adjusted to a proper distance according to the specifications and models of the sealing surface of the valve body to be surfacing treated, the welding gun of the surfacing machine is at a proper distance from the sealing surface of the valve body, the diameter of the sealing surface of the valve body to be surfacing treated by the surfacing machine can be adjusted, the valve body of different specifications and models can be adjusted, and the device can be suitable for valve bodies of different specifications and models.

[0023] 2: The welding machine in the application makes circumferential motion around the slide rod to perform surfacing on the sealing surface of the valve body, the entire annular surface of the sealing surface of the valve body can be surfaced at one time, the surfacing of the sealing surface of the valve body can be completed at one time, the surfacing of the sealing surface of the valve body is fast and rapid, and the problem that the annular surface is easily skewed when the sealing surface of the valve body is surfaced by the traditional manual surfacing machine is replaced, the annular surfacing of the surfacing machine can be ensured to be in an annular shape, and the surfacing effect of the sealing surface of the valve body is improved.

[0024] 3: The piston rod of the first electric telescopic rod pushes the third fixed block to move downward to extrude and fix the valve body, the valve body is fixed between the third fixed block and the fourth fixed block, and then the valve body can be fixed, the valve body can be fixed conveniently, the sealing surface of the valve body can be surfaced conveniently, the skewing of the surfacing of the sealing surface of the valve body caused by the sliding and deviation of the valve body during the surfacing of the sealing surface of the valve body is avoided, and the precision of the surfacing of the sealing surface of the valve body is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structure diagram of a valve body sealing surface surfacing equipment according to the application is shown.

[0026] Figure 2 A structure diagram of a valve body sealing surface surfacing equipment according to the application is shown.

[0027] Figure 3 A connection diagram of a mounting disc and a guide rail of a valve body sealing surface surfacing equipment according to the application is shown.

[0028] Figure 4 A structure diagram of a mounting disc of a valve body sealing surface surfacing equipment according to the application is shown.

[0029] Figure 5 A structure diagram of a mounting disc of a valve body sealing surface surfacing equipment according to the application is shown. Figure 4 A local enlarged view of A part in the application is shown.

[0030] Figure 6 A connection diagram of a second fixed plate and a first sliding rod of a valve body sealing surface surfacing equipment according to the application is shown.

[0031] As shown in the figure, 1 is a bottom plate, 2 is a first fixing block, 3 is a mounting disc, 4 is a guide rail, 5 is an electric sliding block, 6 is a second fixing block, 7 is a connecting plate, 8 is a top plate, 9 is a collecting box, 10 is a first electric telescopic rod, 11 is a third fixing block, 12 is a fourth fixing block, 13 is a sliding ring, 14 is a sliding rod, 15 is a supporting rod, 16 is a sliding block, 17 is a first fixing plate, 18 is a second electric telescopic rod, 19 is a fixing rod, 20 is a sliding sleeve, 21 is a second fixing plate, 22 is a limiting block, 23 is a first sliding rod, 24 is a third fixing plate, 25 is a sliding rail, 26 is a sliding plate, 27 is a locking bolt, 28 is a cross plate, 29 is a bearing plate, 30 is a surfacing machine, 31 is a second sliding rod, and 32 is a rectangular plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0033] Reference Figures 1-6 The valve body sealing surface surfacing equipment comprises a bottom plate 1, the mounting disc 3 is installed on the bottom plate 1, the surfacing mechanism for surfacing the valve body sealing surface is rotatably arranged on the side of the mounting disc 3, and the fixing mechanism for fixing the valve is arranged on the mounting disc 3.

[0034] The surfacing mechanism comprises the annular guide rail 4 installed on the side of the mounting disc 3, the electric sliding block 5 is rotatably installed on the guide rail 4, and the surfacing assembly for surfacing the valve body sealing surface is installed on the side of the electric sliding block 5.

[0035] As a technical optimization scheme of the present application, the surfacing assembly comprises the second fixing plate 21 installed on the side of the electric sliding block 5, the first sliding rod 23 is installed on the side of the second fixing plate 21, the third fixing plate 24 is slidably connected on the first sliding rod 23, the cross plate 28 is slidably installed on the side of the third fixing plate 24, the surfacing machine 30 for surfacing the valve body sealing surface is installed on the side of the cross plate 28, and the second fixing plate 21 and the third fixing plate 24 are connected through the first sliding rod 23, so that the third fixing plate 24 can play a guiding role when moving away from the second fixing plate 21.

[0036] As a technical optimization scheme of the present application, the third fixed plate 24 is provided with a sliding rail 25 on the side, the sliding rail 25 is provided with a sliding plate 26 slidingly installed thereon, a horizontal plate 28 is fixed on the side of the sliding plate 26, the sliding plate 26 is provided with locking bolts 27 inserted thereinto, the end of the locking bolts 27 abuts against the sliding rail 25, the height of the surfacing machine 30 is adjusted by loosening the two sets of locking bolts 27 and sliding the sliding plate 26 up and down on the sliding rail 25, and then the height of the horizontal plate 28 is adjusted, and then the height of the bearing plate 29 and the surfacing machine 30 is adjusted, and the height of the welding gun of the surfacing machine 30 is adjusted to a suitable distance according to the specifications and models of the sealing surface of the valve body to be surfacing treated, so that the welding gun of the surfacing machine 30 is at a suitable distance from the sealing surface of the valve body.

[0037] As a technical optimization scheme of the present application, the horizontal plate 28 is provided with a bearing plate 29 on the side, and the surfacing machine 30 is installed on the bearing plate 29, so that the bearing plate 29 provides an installation plane for the surfacing machine 30, and the installation of the surfacing machine 30 is facilitated.

[0038] As a technical optimization scheme of the present application, the mounting disc 3 is provided with a sliding rod 14 on the side, the sliding rod 14 is coaxial with the guide rail 4, the sliding rod 14 is provided with a sliding sleeve 20 slidingly sleeved thereon, the outer wall of the sliding sleeve 20 is fixed with a fixed rod 19, the end of the fixed rod 19 is connected with a rectangular plate 32, the second sliding rod 31 is mounted on the side of the rectangular plate 32, and the bottom of the bearing plate 29 is provided with a sliding groove, the second sliding rod 31 is slidingly installed in the sliding groove, and the second sliding rod 31 facilitates the connection between the rectangular plate 32 and the bearing plate 29.

[0039] As a technical optimization scheme of the present application, the mounting disc 3 is provided with a sliding ring 13 on the side, the sliding ring 13 is coaxial with the guide rail 4, the sliding ring 13 is located in the inner ring of the guide rail 4, the sliding rod 14 is located in the inner ring of the sliding ring 13, the sliding ring 13 is provided with a sliding block 16 slidingly installed thereon, the second electric telescopic rod 18 is mounted on the side of the sliding block 16, the piston rod of the second electric telescopic rod 18 is fixed to the side of the fixed rod 19, the piston rod of the second electric telescopic rod 18 pushes the fixed rod 19 to move towards the valve body, and then the surfacing machine 30 moves towards the valve body, until the welding gun of the surfacing machine 30 is at a preset distance from the sealing surface of the valve body, and then the welding gun of the surfacing machine 30 is pushed to a preset surfacing distance from the sealing surface of the valve body, so that the sealing surface of the valve body is conveniently surfacing treated.

[0040] As a technical optimization scheme of the present application, the sliding block 16 is provided with a first fixed plate 17 on the side, the second electric telescopic rod 18 is installed on the side of the first fixed plate 17, the piston rod of the second electric telescopic rod 18 is fixed with a reinforcing block, and the reinforcing block is fixed to the side of the fixed rod 19, so that the reinforcing block increases the connection strength between the piston rod of the second electric telescopic rod 18 and the fixed rod 19.

[0041] As a technical optimization scheme of the present application, the end of the sliding rod 14 is provided with a limiting block 22, the side of the mounting disc 3 away from the guide rail 4 is provided with a supporting rod 15, the end of the supporting rod 15 is fixed on the top of the bottom plate 1, two groups of fixing holes are symmetrically arranged on the bottom plate 1, and the supporting rod 15 can provide support for the mounting disc 3.

[0042] As a technical optimization scheme of the present application, the fixing mechanism comprises a second fixing block 6 mounted on the top of the mounting disc 3, a first fixing block 2 fixed on the bottom plate 1, the mounting disc 3 mounted on the first fixing block 2, a top plate 8 connected to the top of the second fixing block 6 through a connecting plate 7, a first electric telescopic rod 10 mounted on the bottom of the top plate 8, a third fixing block 11 fixed at the end of the piston rod of the first electric telescopic rod 10, a fourth fixing block 12 fixed on the bottom plate 1 and located directly below the third fixing block 11, arc-shaped grooves matched with the outer wall of the valve body of the valve are arranged on the opposite surfaces of the third fixing block 11 and the fourth fixing block 12, a collecting box 9 is mounted on the bottom of the top plate 8, a dust collector is mounted on the top plate 8, the dust suction end of the dust collector is communicated with the collecting box 9, and the smoke generated during the surfacing treatment of the sealing surface of the valve body by the surfacing machine 30 can be absorbed through the cooperation of the collecting box 9 and the dust collector, so that the smoke generated during the surfacing treatment of the surfacing machine 30 can avoid polluting the surrounding air environment.

[0043] The use method of the valve body sealing surface surfacing equipment in the present application comprises the following steps:

[0044] S1: first, the valve body to be surfacing is placed between the third fixing block 11 and the fourth fixing block 12, the first electric telescopic rod 10 is started, the piston rod of the first electric telescopic rod 10 pushes the third fixing block 11 to move downward to press and fix the valve body, and the valve body is fixed between the third fixing block 11 and the fourth fixing block 12;

[0045] S2: the second electric telescopic rod 18 is started, the piston rod of the second electric telescopic rod 18 pushes the fixing rod 19 to move to the valve body, so that the surfacing machine 30 approaches the valve body, and the surfacing machine 30 stops until the distance between the welding gun of the surfacing machine 30 and the sealing surface of the valve body reaches a preset distance;

[0046] S3: the two groups of locking bolts 27 are loosened, the sliding plate 26 slides up and down on the sliding rail 25 to adjust the height of the surfacing machine 30, and the height of the surfacing machine 30 is stopped after being adjusted to a proper distance;

[0047] S4: at this time, the surfacing machine 30 is started, and the electric sliding block 5 is started at the same time, the electric sliding block 5 slides on the guide rail 4, and the surfacing machine 30 is used for surfacing treatment of the sealing surface of the valve body.

[0048] In use, first, the valve body to be surfacing is placed between the third fixing block 11 and the fourth fixing block 12, the first electric telescopic rod 10 is started, the piston rod of the first electric telescopic rod 10 pushes the third fixing block 11 to move downward to press and fix the valve body, the valve body is fixed between the third fixing block 11 and the fourth fixing block 12, and then the valve body can be fixed, the valve body can be conveniently fixed, the sealing surface of the valve body can be conveniently surfacing, the surfacing of the sealing surface of the valve body is prevented from being skewed due to the sliding deviation of the valve body during surfacing of the sealing surface of the valve body, and the surfacing precision of the sealing surface of the valve body is improved.

[0049] The second electric telescopic rod 18 is started, the piston rod of the second electric telescopic rod 18 pushes the fixing rod 19 to move close to the valve body, and then the surfacing machine 30 is moved close to the valve body, until the distance between the welding gun of the surfacing machine 30 and the sealing surface of the valve body reaches a preset distance to stop, the welding gun of the surfacing machine 30 can be pushed to a preset surfacing distance from the sealing surface of the valve body, and the sealing surface of the valve body can be conveniently surfacing.

[0050] The two groups of locking bolts 27 are loosened, the sliding plate 26 slides up and down on the sliding rail 25 to adjust the height of the surfacing machine 30, and after the height of the surfacing machine 30 is adjusted to an appropriate distance, the height of the surfacing machine 30 is stopped, the height of the horizontal plate 28 can be conveniently adjusted, and then the height of the bearing plate 29 and the surfacing machine 30 can be conveniently adjusted, the height of the welding gun of the surfacing machine 30 can be adjusted to an appropriate distance according to the specifications and models of the sealing surface of the valve body to be surfacing, so that the welding gun of the surfacing machine 30 is at an appropriate distance from the sealing surface of the valve body, and then the diameter of the sealing surface of the valve body surfacing by the surfacing machine 30 can be adjusted, different specifications and models of valve bodies can be adjusted, the device can be applied to different specifications and models of valve bodies, and the position of the horizontal plate 28 is adjusted, and then the sliding plate 26 is fixed on the sliding rail 25 by the locking bolt 27, and the position of the horizontal plate 28 is fixed.

[0051] At this time, the welding machine 30 is started to perform welding on the sealing surface of the valve body. Simultaneously, the electric slider 5 is activated. The electric slider 5 slides on the guide rail 4, causing the second fixed plate 21 to move in a circular motion around the slide rod 14. The second fixed plate 21 then drives the third fixed plate 24 to move in a circular motion around the slide rod 14, which in turn drives the horizontal plate 28 and the bearing plate 29 to move in a circular motion around the slide rod 14. This allows the welding machine 30 to perform welding on the sealing surface of the valve body, and as it moves in a circular motion around the slide rod 14... The welding machine 30 performs circular motion around the slide rod 14 to weld over the sealing surface of the valve body. It can weld the entire annular surface of the valve body's sealing surface in one go, completing the welding process quickly and efficiently. This method also replaces the traditional manual welding process, which often results in a skewed annular surface. The welding machine 30 ensures that the annular weld overlay produced by the machine is perfectly circular, improving the welding effect on the valve body's sealing surface.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A valve body sealing surface overlay welding device, comprising a base plate (1), characterized in that, The base plate (1) is equipped with an installation plate (3), and the side of the installation plate (3) is rotatably provided with a welding mechanism for welding the sealing surface of the valve body. The installation plate (3) is also provided with a fixing mechanism for fixing the valve. The welding mechanism includes an annular guide rail (4) mounted on the side of the mounting plate (3), an electric slider (5) rotatably mounted on the guide rail (4), and a welding assembly for welding the valve body sealing surface mounted on the side of the electric slider (5). The mounting plate (3) is equipped with a sliding rod (14) on its side. The sliding rod (14) is coaxial with the guide rail (4). A sliding sleeve (20) is slidably sleeved on the sliding rod (14). A fixing rod (19) is fixed on the outer wall of the sliding sleeve (20). A rectangular plate (32) is connected to the end of the fixing rod (19). A second sliding rod (31) is installed on the side of the rectangular plate (32). A sliding groove is opened at the bottom of the bearing plate (29). The second sliding rod (31) is slidably installed in the sliding groove. The mounting plate (3) is equipped with a sliding ring (13) on its side. The sliding ring (13) is coaxial with the guide rail (4). The sliding ring (13) is located in the inner ring of the guide rail (4). The slide rod (14) is located in the inner ring of the sliding ring (13). A sliding block (16) is slidably mounted on the sliding ring (13). A second electric telescopic rod (18) is mounted on the side of the sliding block (16). The piston rod end of the second electric telescopic rod (18) is fixed to the side of the fixed rod (19). The sliding block (16) is equipped with a first fixing plate (17) on its side, and the second electric telescopic rod (18) is installed on the side of the first fixing plate (17). The piston rod end of the second electric telescopic rod (18) is fixed with a reinforcing block, which is fixed to the side of the fixing rod (19).

2. The valve body sealing surface overlay welding equipment according to claim 1, characterized in that, The overlay assembly includes a second fixed plate (21) installed on the side of the electric slider (5), a first sliding rod (23) installed on the side of the second fixed plate (21), a third fixed plate (24) slidably connected on the first sliding rod (23), a horizontal plate (28) slidably installed on the side of the third fixed plate (24), and an overlay welding machine (30) for overlaying the sealing surface of the valve body is installed on the side of the horizontal plate (28).

3. The valve body sealing surface overlay welding equipment according to claim 2, characterized in that, The third fixed plate (24) is equipped with a sliding rail (25) on its side. A sliding plate (26) is slidably installed on the sliding rail (25). A horizontal plate (28) is fixed on the side of the sliding plate (26). A locking bolt (27) is inserted into the sliding plate (26). The end of the locking bolt (27) abuts against the sliding rail (25).

4. The valve body sealing surface overlay welding equipment according to claim 2, characterized in that, A bearing plate (29) is installed on the side of the horizontal plate (28), and a welding machine (30) is installed on the bearing plate (29).

5. The valve body sealing surface overlay welding equipment according to claim 1, characterized in that, Limiting blocks (22) are installed at the end of the slide bar (14), and a support rod (15) is installed on the side of the mounting plate (3) away from the guide rail (4). The end of the support rod (15) is fixed to the top of the base plate (1), and two sets of fixing holes are symmetrically opened on the base plate (1).

6. The valve body sealing surface overlay welding equipment according to claim 1, characterized in that, The fixing mechanism includes a second fixing block (6) installed on the top of the mounting plate (3), a first fixing block (2) fixed on the bottom plate (1), the mounting plate (3) installed on the first fixing block (2), the top of the second fixing block (6) is connected to the top plate (8) through the connecting plate (7), the bottom of the top plate (8) is equipped with a first electric telescopic rod (10), the piston rod end of the first electric telescopic rod (10) is fixed to a third fixing block (11), the bottom plate (1) is fixed with a fourth fixing block (12), the fourth fixing block (12) is located directly below the third fixing block (11), the opposite surfaces of the third fixing block (11) and the fourth fixing block (12) are both provided with arc-shaped grooves that cooperate with the outer wall of the valve body, the bottom of the top plate (8) is equipped with a collection box (9), the top plate (8) is equipped with a vacuum cleaner, and the suction end of the vacuum cleaner is connected to the collection box (9).

7. A method of using a valve body sealing surface overlay welding device as described in any one of claims 1-6, characterized in that, The usage method includes the following steps: S1: First, place the valve body that needs to be welded between the third fixed block (11) and the fourth fixed block (12), start the first electric telescopic rod (10), the piston rod of the first electric telescopic rod (10) pushes the third fixed block (11) down to squeeze and fix the valve body, and fix the valve body between the third fixed block (11) and the fourth fixed block (12). S2: Start the second electric telescopic rod (18). The piston rod of the second electric telescopic rod (18) pushes the fixed rod (19) to move closer to the valve body, thereby causing the welding machine (30) to move closer to the valve body until the welding gun of the welding machine (30) reaches the preset distance from the sealing surface of the valve body and stops. S3: Loosen the two sets of locking bolts (27) so that the sliding plate (26) slides up and down on the sliding rail (25) to adjust the height of the welding machine (30). Stop after adjusting the height of the welding machine (30) to a suitable distance. S4: At this time, start the welding machine (30) and start the electric slider (5) at the same time. The electric slider (5) slides on the guide rail (4) and uses the welding machine (30) to weld the sealing surface of the valve body.

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