Valve maintenance workbench

Abstract

The utility model relates to a valve maintenance workbench which comprises a machine frame, a main dismounting rotary table connected to the upper side of the machine frame, two dismounting mechanisms located on the two sides of the main dismounting rotary table respectively and a driving assembly used for driving the two dismounting mechanisms to slide at the same time. The disassembling and assembling mechanism comprises a fixing assembly connected to the rack in a sliding mode, a tool rotary table installed on the fixing assembly and a plurality of fasteners, one end of each fastener is detachably connected to the tool rotary table, the main disassembling rotary table is used for containing a valve, and the fixing assembly is in transmission connection to the driving end of the driving assembly. The two tool rotary tables are oppositely arranged and located on the upper side of the main disassembling rotary table, and the other end of the fastener is used for being detachably connected to a valve body assembly. The utility model can save human resources and protect the safety of personnel and equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve maintenance workbench. Background Art

[0002] Valves are the main components for achieving pipeline connectivity and steering control. As the service life of valves increases, the failure rate also increases. Some failures require valves to be taken offline for repair. Since the end faces of valves are mostly round flange faces, once they are disassembled and taken offline, most of them can only fall to the ground. However, during the process of valve disassembly maintenance, inspection, and assembly, there are many requirements for the placement of valves. For example, the three-stage high-pressure forged steel ball valve is divided into three sections, connected by flanges, and equipped with a large number of springs and sealing structures.

[0003] In view of the above problems, the existing placement method usually uses overhead cranes, forklifts and other lifting tools to adjust the valve placement posture. This method is difficult to accurately achieve the posture required for maintenance and repair, and the valve posture adjustment in this way is easy to slide and tip over, which is not only very inconvenient to work, but also unsafe. Utility Model Content

[0004] The utility model provides a valve maintenance workbench, which can save human resources and protect the safety of personnel and equipment.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A valve maintenance workbench comprises a frame, a main disassembly turntable connected to the upper side of the frame, two disassembly and assembly mechanisms respectively located on both sides of the main disassembly turntable, and a driving assembly for simultaneously driving the two disassembly and assembly mechanisms to slide, the disassembly and assembly mechanism comprises a fixed assembly slidably connected to the frame, a tooling turntable installed on the fixed assembly, and a plurality of fasteners with one end detachably connected to the tooling turntable, the main disassembly turntable is used to place valves, the fixed assembly is transmission-connected to the driving end of the driving assembly, the two tooling turntables are arranged opposite to each other and are located on the upper side of the main disassembly turntable, and the other end of the fastener is used to be detachably connected to the valve body assembly.

[0007] The beneficial effects of the utility model are as follows: the valve assembly is placed on the main disassembly turntable of the machine, and after it is firmly fixed by using the configured tooling and tools, the left and right valve body assemblies are disassembled to remove the fixing bolts on their flanges, and then they are connected and firmly fixed to the two tooling turntables by fasteners, and then the two fixing assemblies are driven to move by the driving assembly, so that the left and right valve body assemblies and the middle valve body are separated; through this disassembly method, the disassembly and assembly on the workbench mainly enables the assembly work to be guided by the coordinate direction, reduces the labor intensity and assembly difficulty of the workers and the occurrence of errors, saves human resources, and protects the safety of personnel and equipment.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the fixing assembly includes a fixing plate slidably connected to the frame and a supporting plate fixedly connected to the fixing plate, the other end of the fixing plate is transmission-connected to the driving end of the driving assembly, and the tooling turntable is mounted on the supporting plate.

[0010] The beneficial effect of adopting the above further solution is that when in use, the driving assembly drives the fixed plate to move, driving the support plate and the tooling turntable to move simultaneously.

[0011] Furthermore, the support plate includes a bottom plate fixedly connected to the fixed plate and a top plate rotatably connected to the bottom plate at the lower end, the tooling turntable is mounted on the top plate, and the bottom plate and the top plate are simultaneously detachably connected to support members.

[0012] The beneficial effect of adopting the above further scheme is that the angle between the bottom plate and the top plate can be adjusted by relative rotation, and then supported by the support member to achieve connection, disassembly and installation operations of the left and right valve body components with different angles.

[0013] Furthermore, the support member includes an oil cylinder detachably connected to the bottom plate and a rotating seat rotatably connected to the piston end of the oil cylinder, and the rotating seat is fixedly connected to the top plate.

[0014] The beneficial effect of adopting the above further solution is that while the top plate is supported by the support member, the angle between the bottom plate and the top plate can be adjusted by the oil cylinder.

[0015] Furthermore, the support plate also includes a central axis, and the central axis is rotatably connected to a connection between one end of the bottom plate and a lower end of the top plate.

[0016] The beneficial effect of adopting the above further solution is: the central axis is used to realize the rotation connection between the bottom plate and the top plate, so as to facilitate the adjustment of the maintenance posture of the valve assembly and enable the valve assembly to be turned over.

[0017] Furthermore, one side of the two support plates facing each other is fixedly connected with a revolving plate, the revolving plate is rotatably connected with a rotating shaft, one end of the rotating shaft is rotatably connected to the revolving plate, and the other end is fixedly connected to the tooling turntable.

[0018] The beneficial effect of adopting the above further scheme is: the installation of the tooling turntable is achieved by utilizing the swivel plate and the rotating shaft, and one end of the rotating shaft is rotatably connected to the swivel plate, so that the tooling turntable can rotate, driving the fixed valve body assembly to rotate, so as to accurately adjust the maintenance posture of the valve assembly, and can rotate 360°.

[0019] Further, the fastener includes a central fastening component, which includes a central guide column with one end threadedly connected to the other end of the rotating shaft and a central expansion sleeve sleeved on the other end of the central guide column, the diameter of the other end of the central guide column gradually increases from close to to far away from the tooling turntable, one side of the central expansion sleeve is pressed against the tooling turntable, and the central expansion sleeve is used to penetrate the valve of the valve body assembly.

[0020] The beneficial effect of adopting the above further solution is: by rotating the rotating shaft, the central guide column moves toward the tooling turntable, and under the limit of the tooling turntable, the central expansion sleeve expands and realizes the expansion and tightening of the valve of the valve body assembly.

[0021] Further, the fastener includes a plurality of end fastening components, the end fastening components including an end guide column with one end slidably connected to the tooling turntable, an end expansion sleeve sleeved on the other end of the end guide column, and a tightening bolt threadedly connected to one end of the end guide column, the diameter of the other end of the end guide column gradually increases from close to to far away from the tooling turntable, one side of the end expansion sleeve is pressed against the tooling turntable, the end expansion sleeve is used to penetrate the flange bolt hole of the valve body assembly, and the tightening bolt is simultaneously connected to the tooling turntable.

[0022] The beneficial effect of adopting the above further solution is: by rotating the tightening bolt, the end guide column moves toward the tooling turntable, and under the limit of the tooling turntable, the end expansion sleeve expands and realizes the expansion and tightening of the valve of the valve body assembly.

[0023] Furthermore, at least two slide rails are installed on the upper side of the frame, and the fixing assembly is slidably connected to the slide rails.

[0024] The beneficial effect of adopting the above further solution is that while the slide rail provides support for the fixed component, the fixed component slides on the slide rail under the drive of the drive component.

[0025] Furthermore, a vibration-damping pad is fixed to the bottom of the frame.

[0026] The beneficial effect of adopting the above further solution is: utilizing the vibration-damping pad to achieve vibration reduction and protection of the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an overall diagram of the valve maintenance workbench of the utility model;

[0028] Figure 2 for Figure 1 A partial enlarged view of

[0029] Figure 3 A top view of the valve maintenance workbench of the utility model;

[0030] Figure 4 This is a side view of the valve maintenance workbench of the utility model, mainly used to show the installation structure of the rotary plate;

[0031] Figure 5 It is a partial cross-sectional view of the valve maintenance workbench of the utility model;

[0032] Figure 6 for Figure 5 A partial enlarged view of

[0033] Figure 7 It is a top view of the tooling turntable of the utility model.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Frame; 11. Slide rail; 12. Vibration damping pad;

[0036] 2. Main dismantling turntable;

[0037] 3. Fixed assembly; 31. Fixed plate; 32. Support plate; 321. Bottom plate; 322. Top plate; 323. Center axis; 33. Support member; 331. Oil cylinder; 332. Rotating seat; 34. Rotating plate;

[0038] 4. Tooling turntable; 41. Center hole; 42. End hole;

[0039] 5. Central fastening component; 51. Central guide column; 52. Central expansion sleeve;

[0040] 6. End fastening component; 61. End guide column; 62. End expansion sleeve; 63. Tension bolt;

[0041] 7. Drive components;

[0042] 8. Rotating shaft. DETAILED DESCRIPTION

[0043] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0044] First, the valve body assembly targeted by the valve maintenance workbench of the utility model is explained. For example, for a natural gas pipeline, a commonly used three-stage high-pressure forged ball valve is divided into an inlet valve, an intermediate valve and an outlet valve. Each valve is connected by a flange, and a single valve and a pipeline are also connected by a flange.

[0045] Example 1

[0046] like Figures 1 to 5A valve maintenance workbench comprises a frame 1, a main disassembly turntable 2 connected to the upper side of the frame 1, two disassembly and assembly mechanisms respectively located on both sides of the main disassembly turntable 2, and a driving component 7 for simultaneously driving the two disassembly and assembly mechanisms to slide. The disassembly and assembly mechanism comprises a fixed component 3 slidably connected to the frame 1, a tooling turntable 4 installed on the fixed component 3, and a plurality of fasteners of which one end is detachably connected to the tooling turntable 4. The main disassembly turntable 2 is used to place the valve, the fixed component 3 is transmission-connected to the driving end of the driving component 7, the two tooling turntables 4 are arranged opposite to each other and are both located on the upper side of the main disassembly turntable 2, and the other end of the fastener is used to be detachably connected to the valve body assembly.

[0047] The beneficial effects of this embodiment are as follows: the valve assembly is placed on the main disassembly turntable 2 of the machine, and is fixed firmly with the configured tooling and tools. Then, the fixing bolts on the flanges of the left and right valve body assemblies are removed, and they are connected and firmly fixed to the two tooling turntables 4 by fasteners. Then, the two fixing assemblies 3 are driven to move by the driving assembly 7, so that the left and right valve body assemblies and the middle valve body are separated. Through this disassembly method, the disassembly and assembly on the workbench mainly enables the assembly work to be guided by the coordinate direction, reduces the labor intensity and assembly difficulty of the workers and the occurrence of errors, saves human resources, and protects the safety of personnel and equipment.

[0048] Among them, the frame 1 is made of 45 steel, which has high strength and can bear a large weight.

[0049] The main disassembly turntable 2 can be made of 45 steel. A plurality of bolt holes are axially provided on the main disassembly turntable 2 to fix the valve assembly placed on the main disassembly turntable 2 by bolts.

[0050] As one of the parallel solutions of the above embodiment, the main disassembly turntable 2 is fixedly connected to the upper side of the frame 1 by bolts.

[0051] As one of the parallel solutions of the above embodiment, the main disassembly turntable 2 can be rotatably connected to the upper side of the frame 1.

[0052] Based on the above embodiment, the driving component 7 includes a twin-body cylinder, the cylinder body of the twin-body cylinder is fixedly connected to the frame 1, and the two piston ends of the twin-body cylinder are detachably connected to the two fixed components 3 through nuts to achieve synchronous driving of the two fixed components 3.

[0053] As a parallel solution, the drive assembly 7 can also be a linear drive mechanism such as a bidirectional screw, a double-headed cylinder, etc.

[0054] Example 2

[0055] like Figure 1 and Figure 2On the basis of Example 1, the fixing assembly 3 includes a fixing plate 31 slidably connected to the frame 1 and a supporting plate 32 fixedly connected to the fixing plate 31, the other end of the fixing plate 31 is transmission-connected to the driving end of the driving assembly 7, and the tooling turntable 4 is installed on the supporting plate 32.

[0056] The beneficial effect of adopting the preferred solution in the above embodiment is that, when in use, the driving assembly 7 drives the fixed plate 31 to move, driving the supporting plate 32 and the tooling turntable 4 to move simultaneously.

[0057] The fixing plate 31 is overall “L”-shaped, one end of which is horizontally arranged and slidably connected to the frame 1 , and the other end of which extends vertically downward to be transmission-connected to the driving end of the driving assembly 7 .

[0058] Example 3

[0059] like Figure 1 and Figure 2 On the basis of embodiments 1 and 2, the support plate 32 includes a bottom plate 321 fixedly connected to the fixed plate 31 and a top plate 322 rotatably connected to the bottom plate 321 at the lower end, the tooling turntable 4 is installed on the top plate 322, and the bottom plate 321 and the top plate 322 are simultaneously detachably connected to the support member 33.

[0060] The beneficial effect of the preferred solution in the above embodiment is that the angle between the bottom plate 321 and the top plate 322 can be adjusted by relative rotation, and then supported by the support member 33, so as to realize the connection, disassembly and installation of the left and right valve body components with different angles. When supporting, the support angle can be changed by selecting different disassembly connection points.

[0061] Example 4

[0062] like Figure 1 and Figure 2 On the basis of embodiments 1-3, the support member 33 includes a cylinder 331 detachably connected to the bottom plate 321 and a rotating seat 332 rotatably connected to the piston end of the cylinder 331 , and the rotating seat 332 is fixedly connected to the top plate 322 .

[0063] The beneficial effect of adopting the preferred solution in the above embodiment is that while the top plate 322 is supported by the support member 33, the angle between the bottom plate 321 and the top plate 322 can be adjusted by the cylinder 331. By adopting this solution, it can be achieved by only opening and closing the cylinder 331.

[0064] As a parallel solution of the above embodiment, the support member 33 can also be a linear drive member such as a cylinder, a worm gear, etc., and the driving end of the linear drive member can be connected to the rotating seat 332 in a transmission manner.

[0065] Example 5

[0066] like Figure 1 and Figure 2 On the basis of embodiments 1-4, the support plate 32 further includes a central axis 323, which is rotatably connected to a connection between one end of the bottom plate 321 and a lower end of the top plate 322.

[0067] The beneficial effect of adopting the preferred solution in the above embodiment is that the central axis 323 is used to realize the rotation connection between the bottom plate 321 and the top plate 322, so as to facilitate the adjustment of the maintenance posture of the valve assembly and enable the valve assembly to flip.

[0068] Example 6

[0069] like Figure 2 , Figure 4 as well as Figure 5 On the basis of Examples 1-5, the two supporting plates 32 are fixedly connected to a rotating plate 34 on one side facing each other, and the rotating plate 34 is rotatably connected to a rotating shaft 8, one end of the rotating shaft 8 is rotatably connected to the rotating plate 34, and the other end is fixedly connected to the tooling turntable 4.

[0070] The beneficial effect of adopting the preferred scheme in the above embodiment is that the installation of the tooling turntable 4 is achieved by utilizing the rotating plate 34 and the rotating shaft 8, and one end of the rotating shaft 8 is rotatably connected to the rotating plate 34, so that the tooling turntable 4 can rotate, driving the valve body assembly fixed thereon to rotate, so as to accurately adjust the maintenance posture of the valve assembly, and can rotate 360°.

[0071] Based on the above embodiment, the rotating shaft 8 includes a sleeve and a screw, and the rod end of the screw is threadedly connected to one end of the sleeve, so that one end of the sleeve is connected to the rotating plate 34 by the screw to achieve installation. The other end of the sleeve is fixedly connected to the tooling turntable 4 by key connection, clamping, etc.

[0072] On the basis of the above embodiment, a center hole 41 is formed through the center point of the tooling turntable 4 , and the other end of the sleeve is inserted into and fixedly connected to the center hole 41 .

[0073] Example 7

[0074] like Figure 2 , Figure 5 as well as Figure 6 On the basis of Examples 1-6, the fastener includes a central fastening component 5, the central fastening component 5 includes a central guide column 51 with one end threadedly connected to the other end of the rotating shaft 8 and a central expansion sleeve 52 sleeved on the other end of the central guide column 51, the diameter of the other end of the central guide column 51 gradually increases from close to to far away from the tooling turntable 4, one side of the central expansion sleeve 52 is pressed against the tooling turntable 4, and the central expansion sleeve 52 is used to penetrate the valve of the valve body assembly.

[0075] The beneficial effect of the preferred solution in the above embodiment is that the central guide column 51 is moved toward the tooling turntable 4 by rotating the rotating shaft 8, and the central expansion sleeve 52 expands and realizes the expansion of the valve of the valve body assembly under the limit of the tooling turntable 4. Among them, since the diameter of the other end of the central guide column 51 gradually increases from close to far away from the tooling turntable 4, the central expansion sleeve 52 cannot fall off the central guide column 51, and under the action of one side of the central expansion sleeve 52 being pressed against the tooling turntable 4, the central expansion sleeve 52 is smoothly expanded.

[0076] The central expansion sleeve 52 may be made of rubber.

[0077] As a specific solution of the above embodiment, one end of the central guide column 51 is threadedly connected to one end of the sleeve.

[0078] During specific installation, firstly insert the center expansion sleeve 52 into the flange threaded hole of the valve body assembly valve, and then thread one end of the center guide column 51 to one end of the sleeve. As the center guide column 51 is tightened, the center expansion sleeve 52 is tightened.

[0079] As another installation method, after the multiple center expansion sleeves 52 are tightened, the rotating shaft 8 and the rotating plate 34 can be fixedly connected by screws.

[0080] Example 8

[0081] like Figure 2 , Figure 5 , Figure 6 as well as Figure 7 On the basis of Examples 1-7, the fastener includes a plurality of end fastening components 6, the end fastening components 6 include an end guide column 61 whose one end is slidably connected to the tooling turntable 4, an end expansion sleeve 62 sleeved on the other end of the end guide column 61, and a tightening bolt 63 threadedly connected to one end of the end guide column 61, the diameter of the other end of the end guide column 61 gradually increases from close to to far away from the tooling turntable 4, one side of the end expansion sleeve 62 is pressed against the tooling turntable 4, and the end expansion sleeve 62 is used to penetrate the flange bolt hole of the valve body assembly, and the tightening bolt 63 is connected to the tooling turntable 4 at the same time.

[0082] The beneficial effect of the preferred solution in the above embodiment is that the end guide column 61 is moved toward the tooling turntable 4 by rotating the tension bolt 63, and the end expansion sleeve 62 expands and realizes the expansion of the valve of the valve body assembly under the limit of the tooling turntable 4. Among them, since the diameter of the other end of the end expansion sleeve 62 gradually increases from close to the tooling turntable 4 to far away from the tooling turntable 4, the end expansion sleeve 62 cannot fall off from the end guide column 61, and under the action of one side of the end expansion sleeve 62 being pressed against the tooling turntable 4, the end expansion sleeve 62 is not smoothly expanded.

[0083] On the basis of the above-mentioned embodiment, a countersunk hole is opened at the end of the tooling turntable 4 to facilitate the head of the tightening bolt 63 to be immersed.

[0084] Based on the above embodiment, a plurality of end holes 42 are formed through the end of the tooling turntable 4 , and the plurality of end holes 42 are evenly distributed circumferentially around the central hole 41 , and one end of the end guide column 61 is inserted into and slidably connected to the end hole 42 of the tooling turntable 4 .

[0085] A plurality of end holes 42 are evenly distributed circumferentially on different circumferences to achieve connection to flanges of different diameters.

[0086] Example 9

[0087] like Figure 1 and Figure 3 On the basis of embodiments 1-8, at least two slide rails 11 are installed on the upper side of the rack 1, and the fixing component 3 is slidably connected to the slide rails 11.

[0088] The beneficial effect of adopting the preferred solution in the above embodiment is that while the slide rail 11 forms support for the fixed component 3 , the fixed component 3 slides on the slide rail 11 under the drive of the drive component 7 .

[0089] Based on the above embodiment, a plurality of balls are rotatably connected to the upper side of the slide rail 11 to reduce friction. The slide rail 11 is made of high-speed steel, which has high hardness, high strength and wear resistance.

[0090] An oil pan is provided on the frame 1 for discharging dirt and waste residue after maintenance and inspection.

[0091] Example 10

[0092] like Figure 1 and Figure 2 On the basis of the embodiment 1-9, a vibration-damping pad 12 is fixed to the bottom of the frame 1. The vibration-damping pad 12 can be made of rubber.

[0093] The beneficial effect of adopting the preferred solution in the above embodiment is that the vibration reduction pad 12 is used to reduce vibration and protect the ground.

[0094] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0095] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0096] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] 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 the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A valve maintenance workbench, characterized in that: The invention comprises a frame (1), a main disassembly turntable (2) connected to the upper side of the frame (1), two disassembly and assembly mechanisms respectively located on both sides of the main disassembly turntable (2), and a driving component (7) used to simultaneously drive the two disassembly and assembly mechanisms to slide, wherein the disassembly and assembly mechanism comprises a fixing component (3) slidably connected to the frame (1), a tooling turntable (4) installed on the fixing component (3), and a plurality of fasteners one end of which is detachably connected to the tooling turntable (4), the main disassembly turntable (2) is used to place a valve, the fixing component (3) is transmission-connected to the driving end of the driving component (7), the two tooling turntables (4) are arranged opposite to each other and are located on the upper side of the main disassembly turntable (2), and the other end of the fastener is used to be detachably connected to the valve body component.

2. A valve maintenance workbench according to claim 1, characterized in that: The fixing assembly (3) comprises a fixing plate (31) slidably connected to the frame (1) and a supporting plate (32) fixedly connected to the fixing plate (31); the other end of the fixing plate (31) is drivingly connected to the driving end of the driving assembly (7); and the tooling turntable (4) is mounted on the supporting plate (32).

3. A valve maintenance workbench according to claim 2, characterized in that: The support plate (32) comprises a bottom plate (321) fixedly connected to the fixed plate (31) and a top plate (322) rotatably connected to the bottom plate (321) at the lower end; the tooling turntable (4) is mounted on the top plate (322); and the bottom plate (321) and the top plate (322) are simultaneously detachably connected to a support member (33).

4. A valve maintenance workbench according to claim 3, characterized in that: The support member (33) comprises an oil cylinder (331) detachably connected to the bottom plate (321) and a rotating seat (332) rotatably connected to the piston end of the oil cylinder (331), and the rotating seat (332) is fixedly connected to the top plate (322).

5. A valve maintenance workbench according to claim 3, characterized in that: The support plate (32) further comprises a central shaft (323), and the central shaft (323) is rotatably connected to a connection point between one end of the bottom plate (321) and the lower end of the top plate (322).

6. A valve maintenance workbench according to claim 2, characterized in that: The two supporting plates (32) are fixedly connected to a rotating plate (34) on one side facing each other. The rotating plate (34) is rotatably connected to a rotating shaft (8). One end of the rotating shaft (8) is rotatably connected to the rotating plate (34), and the other end is fixedly connected to the tooling turntable (4).

7. A valve maintenance workbench according to claim 6, characterized in that: The fastener comprises a central fastening component (5), wherein the central fastening component (5) comprises a central guide column (51) having one end threadedly connected to the other end of the rotating shaft (8) and a central expansion sleeve (52) sleeved on the other end of the central guide column (51), wherein the diameter of the other end of the central guide column (51) gradually increases from close to to far from the tooling turntable (4), and one side of the central expansion sleeve (52) is pressed against the tooling turntable (4), and the central expansion sleeve (52) is used to penetrate the valve of the valve body assembly.

8. A valve maintenance workbench according to any one of claims 1 to 7, characterized in that: The fastener comprises a plurality of end fastening components (6), wherein the end fastening components (6) comprise an end guide column (61) having one end slidably connected to the tooling turntable (4), an end expansion sleeve (62) sleeved on the other end of the end guide column (61), and a tensioning bolt (63) threadedly connected to one end of the end guide column (61), wherein the diameter of the other end of the end guide column (61) gradually increases from approaching to moving away from the tooling turntable (4), one side of the end expansion sleeve (62) is pressed against the tooling turntable (4), the end expansion sleeve (62) is used to penetrate into the flange bolt hole of the valve body assembly, and the tensioning bolt (63) is simultaneously connected to the tooling turntable (4).

9. A valve maintenance workbench according to any one of claims 1 to 7, characterized in that: At least two slide rails (11) are installed on the upper side of the frame (1), and the fixing assembly (3) is slidably connected to the slide rails (11).

10. A valve maintenance workbench according to any one of claims 1 to 7, characterized in that: A vibration-damping pad (12) is fixed to the bottom of the frame (1).

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