Welding device

Abstract

The present application relates to the technical field of welding, in particular to a welding device. In the technical scheme of the present application, the welding device is used for welding the sealing lip of a valve, and comprises a supporting mechanism, an executing mechanism and a welding mechanism. The supporting mechanism is used for being installed on the valve rod of the valve. The executing mechanism comprises a base, a walking mechanism and an adjusting mechanism. The base is connected to the supporting mechanism, and the walking mechanism is arranged on the base. The walking mechanism is connected to the adjusting mechanism and is configured to drive the adjusting mechanism to rotate around the central axis of the valve rod. The welding mechanism comprises a welding gun, and the welding gun is connected to the adjusting mechanism and is used for rotating around the central axis of the valve rod under the driving of the adjusting mechanism. By setting the mutually cooperating supporting mechanism, executing mechanism and welding mechanism, the valve can be welded in a limited space, the welding efficiency is improved, and the needs of on-site maintenance are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a welding device. BACKGROUND

[0002] In the field of nuclear power, thermal power, petrochemical, etc., valves play a crucial role. Generally, the valve cover and valve body are sealed and connected by the sealing lip weld to prevent the leakage of the medium inside the valve body. On the one hand, during the operation of the valve, medium leakage is likely to occur at the sealing lip weld of the valve, and the sealing lip weld must be re-welded. On the other hand, during the equipment shutdown for maintenance, the sealing lip weld needs to be cut open, the sealing surface needs to be inspected, and then the sealing lip needs to be re-welded.

[0003] In related technologies, manual argon arc welding is usually used, but due to the narrow environment of the valve, manual operation is difficult, and the welding quality cannot be guaranteed. It takes a long time and the labor efficiency is low. If an automatic welding device is used for welding, it is difficult to directly perform automatic welding on the valve in a narrow environment due to its large size, and it cannot meet the needs of on-site maintenance. SUMMARY

[0004] Therefore, it is necessary to provide a welding device to enable welding of a valve in a limited space and improve welding efficiency.

[0005] The present application provides a welding device for welding the sealing lip of a valve, the welding device comprising:

[0006] A support mechanism for mounting on a valve stem of the valve;

[0007] An execution mechanism comprising a base, a walking mechanism and an adjusting mechanism; the base is connected to the support mechanism, the walking mechanism is arranged on the base, the walking mechanism is connected to the adjusting mechanism and is configured to drive the adjusting mechanism to rotate around the central axis of the valve stem; and

[0008] A welding mechanism comprising a welding torch, the welding torch being connected to the adjusting mechanism and being configured to rotate around the central axis of the valve stem under the driving of the adjusting mechanism.

[0009] In one embodiment, the support mechanism comprises:

[0010] A sleeve for sleeving on the valve stem;

[0011] A first fixing member arranged at a first end of the sleeve, the sleeve being fixed to the valve stem by means of the first fixing member; and

[0012] A second fixing member arranged at a second end of the sleeve, the sleeve being fixed to the base by means of the second fixing member;

[0013] The walking mechanism and the adjusting mechanism are arranged around the outer periphery of the sleeve.

[0014] In one of the embodiments, the base is provided with a first opening penetrating through the base along a first direction, and the walking mechanism is provided with a second opening penetrating through the walking mechanism along the first direction;

[0015] The first opening and the second opening are configured to have an open loop shape in a normal projection profile on a reference plane;

[0016] The first direction is parallel to the central axis, and the reference plane is perpendicular to the first direction and the central axis.

[0017] In one of the embodiments, the sleeve comprises a connecting member arranged at the second end;

[0018] The connecting member is capable of being arranged at the first opening, and the connecting member is capable of being connected to the base by means of the second fixing member.

[0019] In one of the embodiments, the connecting member is detachably connected to the second end of the sleeve.

[0020] In one of the embodiments, the welding device further comprises an adapter connected to the first end, and the valve rod extends into the sleeve through the adapter;

[0021] The first fixing member is arranged at a side of the adapter away from the sleeve.

[0022] In one of the embodiments, an outer periphery of the valve rod is provided with a thread, and the first fixing member is a nut.

[0023] The first fixing member is threadedly connected to the valve rod.

[0024] In one of the embodiments, the walking mechanism comprises:

[0025] A rotating member arranged at a first side of the base;

[0026] A transmission member arranged in the base and transmissionally connected to the rotating member; and

[0027] A first driving member arranged at a second side of the base and drivingly connected to the transmission member, for driving the rotating member to rotate, thereby driving the rotating member to rotate.

[0028] The first side and the second side are opposite sides of the base along a direction parallel to the central axis, and the first side is closer to the valve than the second side.

[0029] In one of the embodiments, an outer periphery of the rotating member is provided with a tooth portion, and the tooth portion is engaged with an output end of the transmission member.

[0030] In one of the embodiments, the adjusting mechanism comprises a first adjusting assembly connected to the walking mechanism, and a second adjusting assembly connected between the first adjusting assembly and the welding gun;

[0031] The first adjusting assembly is configured to drive the second adjusting assembly to reciprocate along a direction parallel to the central axis.

[0032] The second adjusting assembly is configured to drive the welding torch to reciprocate along a direction perpendicular to the central axis.

[0033] In one of the embodiments, the welding device further comprises a controller.

[0034] The second adjusting assembly comprises:

[0035] a detecting member arranged on the welding torch and electrically connected to the controller, for detecting the arc voltage during the welding process; and

[0036] a second driving member arranged on the second adjusting assembly and electrically connected to the controller, the second driving member being connected to the welding torch and capable of driving the welding torch to reciprocate along a direction perpendicular to the central axis.

[0037] The controller is configured to control the action of the second driving member according to the arc voltage detected by the detecting member.

[0038] In one of the embodiments, the welding torch comprises:

[0039] a welding torch body;

[0040] a first adjusting member comprising a first moving member and a first mounting member connected to the adjusting mechanism, the first moving member being movable through the first mounting member along a direction parallel to the central axis; and

[0041] a second adjusting member comprising a second moving member connected to the welding torch body and a second mounting member connected to one end of the first moving member, the second moving member being movable through the second mounting member along a direction perpendicular to the central axis.

[0042] In one of the embodiments, the welding mechanism further comprises a wire feeding mechanism connected to the traveling mechanism.

[0043] The wire feeding mechanism is used to feed the welding wire to the welding torch.

[0044] In the welding device, the base connected to the supporting mechanism can be fixed near the valve to be welded, and the traveling mechanism connected to the base can drive the adjusting mechanism to rotate around the sealing lip of the valve to be welded, so that the welding mechanism connected to the adjusting mechanism can perform welding around the sealing lip of the valve to be welded, thereby improving the welding quality and efficiency. Thus, by setting the supporting mechanism, the executing mechanism and the welding mechanism in cooperation, the valve can be welded in a limited space, and the welding efficiency is improved to meet the needs of on-site maintenance.

[0045] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of a welding device installed on a valve to be welded in one embodiment of this application;

[0047] Figure 2 This is a schematic diagram of the support mechanism in one embodiment of this application;

[0048] Figure 3 This is a schematic diagram of the base and the walking mechanism in one embodiment of this application;

[0049] Figure 4 This is a cross-sectional view of the support mechanism mounted on the valve stem in one embodiment of this application;

[0050] Figure 5 As shown in one embodiment of this application Figure 3 A sectional view;

[0051] Figure 6 As shown in one embodiment of this application Figure 1 Enlarged view of a portion of point A in the middle;

[0052] Figure 7 As shown in one embodiment of this application Figure 1 Enlarged view of a section at point B in the middle;

[0053] Figure 8 This is a schematic diagram of a welding mechanism in one embodiment of this application.

[0054] The attached figures are labeled as follows:

[0055] Welding device 10;

[0056] Valve stem 20;

[0057] Valve sealing lip 30;

[0058] Support mechanism 100, sleeve 110, first end 111, second end 112, first fixing member 120, second fixing member 130, third fixing member 140;

[0059] Actuator 200, base 210, first opening 211, first side 212, second side 213, walking mechanism 220, second opening 221, notch e, rotating component 222, first rotating part 2221, second rotating part 2222, toothed part 2223, transmission component 223, first driving component 224, adjusting mechanism 230, first adjusting assembly 231, third driving component 2311, second adjusting assembly 232, second driving component 2321;

[0060] The welding mechanism 300, the welding gun 310, the welding gun body 311, the first adjusting piece 312, the first moving piece 3121, the first mounting piece 3122, the second adjusting piece 313, the second moving piece 3131, the second mounting piece 3132;

[0061] The connecting piece 400;

[0062] The adapting piece 500;

[0063] The controller 600;

[0064] The wire feeding mechanism 700;

[0065] The central axis a, the first direction F1, the second direction F2. DETAILED DESCRIPTION

[0066] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0067] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0068] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0069] In the present application, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like should be construed as broadly as possible, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the present application, unless specifically defined otherwise and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0071] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0072] In the field of nuclear power and the like, valves play a crucial role, among which stop valves and check valves are widely used. The valve usually includes a valve body and a valve cover, and there is a lip between the edge of the valve body and the valve cover. When the valve body and the valve cover are connected, there will be a gap.

[0073] In order to avoid the gap between the valve body and the valve cover of the valve from leaking the medium inside the valve body and causing radiation risk during maintenance, the lip between the edge of the valve body and the valve cover is usually welded together to form a thin sealing ring weld, thereby preventing the medium inside the valve body from leaking out through the gap between the valve body and the valve cover and reducing the risk of radiation leakage.

[0074] The inventors of the present application notice that the valve sealing lip weld is currently mostly manually welded. Due to the narrow environment where the valve is located, manual operation is difficult, and the welding quality cannot be guaranteed. Moreover, the required time is long, and the labor efficiency is low. Moreover, if the welded weld quality is poor, it will lead to internal medium leakage of the valve in the active stage, causing environmental pollution. At present, the welding device that can guarantee the welding quality and improve the welding efficiency is relatively large in size. The valve to be welded needs to be separately disassembled and placed in a larger space for welding. It cannot be directly welded on the valve in a narrow space, and cannot meet the needs of on-site maintenance.

[0075] In order to directly weld in the narrow environment where the valve is located, meet the needs of on-site maintenance, and guarantee the welding quality and improve the welding efficiency, the inventors of the present application have found that the valve stem on the valve cover can be used to fix the overall welding device, so that the welding device is arranged around the valve to be welded, so that the welding device can be directly installed on the valve in a narrow environment. Moreover, the welding process can be adjusted by setting the adjusting mechanism to guarantee the welding quality and improve the welding efficiency.

[0076] The welding device provided by the present application will be further described below in combination with related drawings and some embodiments of the present application.

[0077] Figure 1 A schematic view of the welding device installed on the valve to be welded in an embodiment of the present application is shown. For ease of description, only the content related to the embodiments of the present application is shown.

[0078] In some embodiments of the present application, referring to Figure 1 The welding device 10 provided by an embodiment of the present application is used for welding the sealing lip 30 of the valve. The welding device 10 comprises a supporting mechanism 100, an executing mechanism 200 and a welding mechanism 300. The supporting mechanism 100 is used for being installed on the valve stem 20 of the valve. The executing mechanism 200 comprises a base 210, a walking mechanism 220 and an adjusting mechanism 230. The base 210 is connected to the supporting mechanism 100. The walking mechanism 220 is arranged on the base 210. The walking mechanism 220 is connected to the adjusting mechanism 230 and is configured to drive the adjusting mechanism 230 to rotate around the center axis a of the valve stem 20. The welding mechanism 300 comprises a welding gun 310. The welding gun 310 is connected to the adjusting mechanism 230. The welding gun 310 is used for rotating around the center axis a of the valve stem 20 under the driving of the adjusting mechanism 230.

[0079] The support mechanism 100 mentioned above refers to a mechanism that can be connected with the valve rod 20 and can be connected with the base 210 to fix the overall position of the welding device 10. It can be understood that since the support mechanism 100 is connected with the valve rod 20, it plays a role in positioning the overall device. When other devices are installed, they are installed around the support mechanism 100, which can achieve the effect of being installed around the valve rod 20, thereby avoiding the overall welding device 10 from deviating from the sealing lip edge 30 of the valve to be welded, improving the accuracy of welding, and improving the quality of the weld.

[0080] The base 210 refers to a component in the execution mechanism 200 that is connected with the support mechanism 100 and is fixed in position. Optionally, a handle can be provided on the base 210 to facilitate the operator to hold it, which is not limited here.

[0081] The walking mechanism 220 refers to a mechanism that is rotatably connected with the base 210 and can drive the adjustment mechanism 230 connected thereto to rotate around the center axis of the valve rod 20.

[0082] The adjustment mechanism 230 refers to a mechanism that can adjust the welding position of the welding gun 310 during welding.

[0083] The welding mechanism 300 refers to a mechanism that is connected with the adjustment mechanism 230 and can be driven by the adjustment mechanism 230 to perform welding.

[0084] The welding device 10 described above is installed on the valve rod 20 of the valve, so that the base 210 connected with the support mechanism 100 can be fixed near the valve to be welded, and then the walking mechanism 220 connected with the base 210 can drive the adjustment mechanism 230 to rotate around the valve to be welded, thereby ensuring that the welding mechanism 300 connected with the adjustment mechanism 230 can perform welding around the sealing lip edge of the valve to be welded, making the welding process stable and reliable. Further, after the welding starts, the walking mechanism 220 drives the adjustment mechanism 230 to rotate, and the adjustment mechanism 230 drives the welding mechanism 300 to rotate, so that the overall device can realize automatic welding, thereby improving the welding efficiency. The adjustment mechanism 230 can adjust the welding position of the welding gun 310 during welding, so that the welding gun 310 is always in a suitable welding position, which can improve the quality of the weld. Therefore, by setting the support mechanism 100, the execution mechanism 200 and the welding mechanism 300 that cooperate with each other, the valve can be welded in a limited space, and the welding efficiency and quality can be improved to meet the needs of on-site maintenance.

[0085] Figure 2 A support mechanism schematic diagram in an embodiment of the application is shown, and only the content related to the embodiment of the application is shown for ease of description.

[0086] In some embodiments of the present application, please refer to Figure 2 The support mechanism 100 comprises a sleeve 110, a first fixing member 120 and a second fixing member 130. The sleeve 110 is arranged on the valve stem 20. The first fixing member 120 is arranged on the first end 111 of the sleeve 110, and the sleeve 110 is fixed to the valve stem 20 by the first fixing member 120. The second fixing member 130 is arranged on the second end 112 of the sleeve 110, and the sleeve 110 is fixed to the base 210 by the second fixing member 130. The walking mechanism 220 and the adjusting mechanism 230 are arranged around the outer periphery of the sleeve 110.

[0087] It can be understood that, please refer to Figure 1 and Figure 2 The above-mentioned "sleeve 110" refers to a component having a channel in the middle, which can allow the upper end portion of the valve stem 20 to be placed in the channel of the sleeve 110. The sleeve 110 can be configured as a rotary body structure around an axis, such as a cylindrical type. When the sleeve 110 is a cylindrical structure, it is consistent with the shape of the valve stem 20, facilitating the connection of the sleeve 110 and the valve stem 20, and since the walking mechanism 220 drives the adjusting mechanism 230 to rotate around the central axis a of the valve stem 20, the walking mechanism 220 can be positioned and rotated using the circumference of the sleeve 110, which improves the utilization of space. The "first fixing member 120" refers to a component that can be connected to the valve stem 20 and can fix the sleeve 110 to the valve stem 20. Optionally, the first fixing member 120 can be a clamp, which is not limited here. The "second fixing member 130" refers to a component that can fix the sleeve 110 to the base 210. Optionally, the second fixing member 130 can be a bolt, which is not limited here.

[0088] Therefore, by configuring the support mechanism 100 as a structure comprising a sleeve 110, a first fixing member 120 and a second fixing member 130, the overall structure of the support mechanism 100 is simple, which not only enables positioning by cooperating with the valve stem 20, but also facilitates disassembly and assembly between components.

[0089] Figure 3 A schematic diagram of the base and the walking mechanism in an embodiment of the present application is shown, and only the content related to the embodiment of the present application is shown for ease of description.

[0090] In some embodiments of the present application, please refer to Figure 1 and Figure 3 The first opening 211 is arranged through the base 210 along the first direction F1, and the second opening 221 is arranged through the walking mechanism 220 along the first direction F1. The first opening 211 and the second opening 221 are configured as a positive projection profile shape in a reference plane, which is an open loop shape. The first direction F1 is parallel to the central axis a, and the reference plane is perpendicular to the first direction F1 and the central axis a.

[0091] It should be noted that the open loop shape refers to a shape with the first end not connected to the second end, and correspondingly, the closed loop shape refers to a shape with the first end connected to the second end. As shown in Figure 1 and Figure 3 When the base 210 and the walking mechanism 220 do not completely wrap the sleeve 110 and form a structure with the first end not connected to the second end in the circumferential direction of the sleeve 110, an opening e is formed.

[0092] In some embodiments, please continue to refer to Figure 3 and refer to Figure 2 When the sleeve 110 is a cylindrical structure, the first opening 211 and the second opening 221 can be configured as an arc structure that can be adapted to the circumference of the sleeve 110, and the diameter of the first opening 211 and the second opening 221 is greater than the diameter of the sleeve 110, so that the base 210 and the walking mechanism 220 can pass through the sleeve 110 along the first direction F1, facilitating the connection of the base 210 and the sleeve 110.

[0093] Since the first opening 211 and the second opening 221 are configured as an open loop shape in the reference plane, the base 210 and the walking mechanism 220 can not only pass through the sleeve 110 along the first direction F1, but also pass through the sleeve 110 from the circumferential side of the sleeve 110, thereby solving the problem that the space where the valve is located is narrow and difficult to install.

[0094] Therefore, by providing the first opening 211 with an open loop shape in the reference plane on the base 210 and the second opening 221 with an open loop shape in the reference plane on the walking mechanism 220, the base 210 and the sleeve 110 can be more flexibly installed, meeting the installation requirements of different installation spaces.

[0095] Figure 4 A cross-sectional view showing that the support mechanism is installed on the valve stem in an embodiment of the present application is shown. For ease of illustration, only the content related to the embodiment of the present application is shown.

[0096] In some embodiments of the present application, please refer to Figure 2 and Figure 4The sleeve 110 comprises a connecting piece 400 arranged at the second end 112 of the sleeve 110. The connecting piece 400 can be capped at the first opening 211, and the connecting piece 400 can be connected with the base 210 by means of the second fixing piece 130. The connecting piece 400 is detachably connected with the second end 112 of the sleeve 110. The welding device 10 further comprises an adapter 500 connected with the first end 111, and the valve rod 20 extends into the sleeve 110 through the adapter 500; the first fixing piece 120 is arranged on the side of the adapter 500 away from the sleeve 110. The valve rod 20 is provided with a thread on the outer periphery, and the first fixing piece 120 is a nut; the first fixing piece 120 is threadedly connected with the valve rod 20.

[0097] The above-mentioned "connecting piece 400" refers to a component by which the second fixing piece 130 can be fixed with the base 210 and can be detachably connected with the sleeve 110. "The connecting piece 400 can be capped at the first opening 211" refers to that the area of the connecting piece 400 in contact with the first opening 211 is greater than the first opening 211, so that part of the connecting piece 400 can be connected with the base 210, thereby enabling the connecting piece 400 to be capped at the first opening 211. Alternatively, the connecting piece 400 can be detachably connected with the sleeve 110 by means of a third fixing piece 140, which can be a bolt, without being limited thereto. In this way, the connecting piece 400 can be replaced to meet different requirements. Alternatively, the connecting piece 400 can be in the shape of a disc, without being limited thereto. It can be understood that the connecting piece 400 makes the connection between the base 210 and the support mechanism 100 more secure, and makes the welding process more reliable. It can be understood that the first fixing piece 120 is arranged on the side of the adapter 500 away from the sleeve 110, and the first fixing piece 120 is a nut, so that the first fixing piece 120 can also support other components of the support mechanism 100 located at the upper end of the first fixing piece 120.

[0098] The above-mentioned "adapter 500" refers to a component which can be matched with the sleeve 110 externally and can be matched with the valve rod 20 internally. It can be understood that the diameter of the sleeve 110 can be relatively large, so that valve rods 20 of different specifications can be placed therein. When the welding device 10 is used for different valves, the valve rod 20 is also different. The adapter 500 can be replaced to make the inside thereof matched with the valve rod 20, so that the support mechanism 100 as a whole can be fixedly connected with the valve rod 20, thereby enabling the welding device 10 of the present application to be used for different types of valves, and increasing the versatility.

[0099] Figure 5 A sectional view of an embodiment of the present application is shown, and only the content related to the embodiment of the present application is shown for the convenience of description. Figure 3

[0100] ​In some embodiments of the present application, please refer to Figure 1 、 Figure 3 and Figure 5 , the walking mechanism 220 includes a rotating member 222, a transmission member 223 and a first driving member 224. The rotating member 222 is arranged on the first side 212 of the base 210, and is used to drive the walking mechanism 220 to move in a circular motion around the valve stem 20. The transmission member 223 is arranged in the base 210, and is drivingly connected to the rotating member 222. The first driving member 224 is arranged on the second side 213 of the base 210, and the driving end of the first driving member 224 extends into the base 210 and is drivingly connected to the transmission member 223, and is used to drive the transmission member 223 to rotate, thereby driving the rotating member 222 to rotate. The first side 212 and the second side 213 are opposite sides of the base 210 in a direction parallel to the central axis a, and the first side 212 is closer to the valve than the second side 213.

[0101] The above-mentioned "rotating member 222" refers to a component that can drive the walking mechanism 220 to move in a circular motion around the valve stem 20. Optionally, the rotating member 222 can be divided into a first rotating part 2221 and a second rotating part 2222. The first rotating part 2221 is partially located in the base 210, which is convenient for the transmission member 223 located in the base 210 to drive the rotating member 222 to rotate. The second rotating part 2222 is fixedly connected to the first rotating part 2221, and the adjusting mechanism 230 is connected to the second rotating part 2222. The area of the second rotating part 2222 can be larger than that of the first rotating part 2221, so that the adjusting mechanism 230 can be completely connected to the second rotating part 2222. In this way, the adjusting mechanism 230 and the welding mechanism 300 can be better driven to rotate within a limited space. The "transmission member 223" refers to a component that is driven to rotate by a driving member, which in turn drives the rotating member 222 to rotate.

[0102] Optionally, the transmission member 223 can be a gear. When the rotating member 222 is also provided with a gear, the transmission member 223 can engage with the rotating member 222, thereby being able to drive the rotating member 222 to rotate. This will not be limited here. The "first driving member 224" refers to a component that has a driving ability and can drive the transmission member 223 to rotate. Optionally, the first driving member 224 can be a walking motor. The output end of the first driving member 224 extends into the base 210, which is convenient for driving the transmission member 223 arranged in the base 210. This will not be limited here.

[0103] It can be understood that the welding device 10 can move in a circular motion around the sealing lip 30 of the valve to be welded, thereby obtaining an annular weld, by driving the transmission member 223 through the first driving member 224 located on the first side 212, driving the transmission member 223 to drive the rotating member 222, and driving the rotating member 222 located on the second side 213 to drive the walking mechanism 220 to move as a whole.

[0104] Thus, the transmission member 223 is arranged in the base 210, the rotating member 222 is partially arranged in the base 210 and partially arranged at the first side 212 of the base 210, and the first driving member 224 is arranged at the second side 213 of the base 210, so that these components do not exceed the outer contour of the actuator 200, and the space occupied is small, and the valve can be used in a narrow environment.

[0105] In some embodiments of the present application, the outer periphery of the rotating member 222 is provided with a tooth portion 2223, and the tooth portion 2223 is engaged with the output end of the transmission member 223. Thus, by engaging the output end of the transmission member 223 arranged in the base 210 with the tooth portion 2223 of the outer periphery of the rotating member 222 partially arranged in the base 210, the first driving member 224 can better drive the transmission member 223 to rotate and drive the rotating member 222 to rotate.

[0106] In combination with the foregoing embodiments, when the base 210 and the walking mechanism 220 are provided with the first opening 211 and the second opening 221, and when the space where the valve is located is sufficient, the base 210 and the walking mechanism 220 can pass through the support mechanism 100 along the first direction F1 through the first opening 211 and the second opening 221, so that the base 210 and the walking mechanism 220 can be arranged around the support mechanism 100, thereby achieving the connection of the base 210 and the support mechanism 100. At this time, the base 210 and the walking mechanism 220 do not need to pass through the support mechanism 100 from the side, and the first opening 211 and the second opening 221 can be configured as a closed loop shape in the normal projection contour shape on the reference plane. When the second opening 221 is a closed loop shape, the tooth portion 2223 arranged on the outer periphery of the rotating member 222 can be completely engaged with the output end of the transmission member 223, and at this time, the rotating member 222 can make a complete circumferential motion. However, the present inventors further noticed that when the second opening 221 is an open loop shape, there is a gap e on the side of the rotating member 222, and at this time, the gap e portion of the rotating member 222 cannot be engaged with the output end of the transmission member 223.

[0107] Therefore, optionally, a chain that is more than twice the length of the gap e of the rotating member 222 can be installed between the rotating member 222 and the transmission member 223, so that the output end of the transmission member 223 drives the chain to move, and the chain drives the rotating member 222 to rotate. For example, Figure 5As shown, at this time, the transmission member 223 can be provided with multiple, the two ends of the chain are respectively provided with a transmission member 223 to facilitate the fixation of the chain and the rotation of the chain, and one transmission member 223 is provided in the middle to be connected with the first driving member 224, and two transmission members 223 can be respectively provided on both sides to facilitate the rotation of the chain along the fixed track. When the first driving member 224 drives the middle transmission member 223, the chain will move like a conveyor belt, so as to drive the rotating member 222 to rotate, and since the half length of the chain is greater than the circumference of the gap e part of the rotating member 222, the chain is always connected with the rotating member 222 during movement, so as to always drive the rotating member 222 to rotate, so as to realize the complete circumferential movement of the rotating member 222 around the valve sealing lip 30 to be welded. Optionally, at this time, the rotating member 222 is roughly in the shape of a C-shaped ring, and the structure thereof can be a sheet structure. Optionally, a long belt can also be provided between the rotating member 222 and the transmission member 223, which can also enable the transmission member 223 to drive the rotating member 222 to complete the circumferential movement, and no more limitation is made herein.

[0108] Figure 6 A partial enlarged view of A in the embodiment of the application is shown. Figure 1 A partial enlarged view of B in the embodiment of the application is shown. Figure 7 A partial enlarged view of A in the embodiment of the application is shown. Figure 2 A partial enlarged view of B in the embodiment of the application is shown. For the convenience of representation, Figure 6 and Figure 7 is an enlarged view observed from the left side direction. For the convenience of description, only the content related to the embodiment of the application is shown. Figure 1

[0109] In some embodiments of the application, please refer to Figure 1 , Figure 6 and Figure 7 The adjusting mechanism 230 includes a first adjusting assembly 231 connected with the walking mechanism 220, and a second adjusting assembly 232 connected between the first adjusting assembly 231 and the welding gun 310. The first adjusting assembly 231 is configured to drive the second adjusting assembly 232 to reciprocate along a direction parallel to the central axis a. The second adjusting assembly 232 is configured to drive the welding gun 310 to reciprocate along a direction perpendicular to the central axis a.

[0110] ​The first adjusting component 231 mentioned above refers to a component that can drive the second adjusting component 232 to drive the welding gun 310 to reciprocate along the first direction F1. Alternatively, the first adjusting component 312 can be set with a target value before welding, so that it can reciprocate along the first direction F1 according to the set target value during welding. In this way, the first adjusting component 231 can drive the welding gun 310 to reciprocate along the first direction F1 according to the target value set according to the welding requirement during work, so that the welding gun 310 can be welded for a small number of times, and the welding quality can be improved. Alternatively, the first adjusting component 231 can include a third driving component 2311, a gear and a rack. The gear is connected between the third driving component 2311 and the rack. The third driving component 2311 provides a driving force to drive the gear to rotate, and the gear drives the rack to move, so that the rack can drive the second adjusting component 232 and the welding gun 310 to reciprocate along the first direction F1. Alternatively, the third driving component 2311 can be a motor, which is not limited here. Similarly, the second adjusting component 232 refers to a component that can drive the welding gun 310 to reciprocate along a direction perpendicular to the central axis a. For convenience of representation, the second direction F2 in the figure is the direction perpendicular to the central axis a. The first adjusting component 231 and the second adjusting component 232 are arranged around the support mechanism 100, and occupy a small space, so that they can be used for valves with narrow space.

[0111] In some embodiments of the present application, please continue to refer to Figure 1The welding device 10 further comprises a controller 600. The second adjusting assembly 232 comprises a detecting member (not shown in the figure) and a second driving member 2321. The detecting member (not shown in the figure) is arranged on the detecting member (not shown in the figure) of the welding torch 310 and is electrically connected to the controller 600, and is used to detect the arc voltage in the welding process. The second driving member 2321 is arranged on the second adjusting assembly 232 and is electrically connected to the controller 600, and the second driving member 2321 drives the welding torch 310 and can drive the welding torch 310 to reciprocate in the direction perpendicular to the central axis a. The controller 600 is configured to control the action of the second driving member 2321 according to the arc voltage detected by the detecting member. Optionally, a target value can be set for the controller 600 before welding, and the controller 600 can receive the arc voltage signal transmitted by the detecting member and compare it with the target value during the welding process. If the arc voltage signal is inconsistent with the target value, the second driving member 2321 is controlled to drive the welding torch 310 to reciprocate in the second direction F2 until the arc voltage signal is consistent with the target value. Optionally, the second driving member 2321 can be a motor, which is not limited here. Optionally, the second adjusting assembly 232 can further comprise a gear and a rack, the second driving member 2321 drives the gear to rotate, the gear is connected with the rack and drives the rack to move, so as to drive the welding torch 310 to reciprocate in the second direction F2. It can be understood that the second adjusting assembly 232 comprises but is not limited to this form, as long as it can drive the welding torch 310 to reciprocate in the second direction F2, which is not limited here.

[0112] Since the lip thickness is thin, it is sensitive to welding heat input, so the position of the welding torch 310 from the weld to be welded is important. If the heat input is too large, it will cause root cracks or quenched structures, and if the heat input is too small, it will easily cause incomplete fusion, which will affect the weld quality. Therefore, the target value is set in the controller 600 in advance, and the distance between the welding torch 310 and the weld during the welding process is controlled, so as to control the heat input and improve the weld quality.

[0113] Figure 8 A schematic diagram of a welding mechanism in an embodiment of the present application is shown, and only the content related to the embodiment of the present application is shown for convenience of description.

[0114] In some embodiments of the present application, please refer to Figure 1 and Figure 8The welding torch 310 comprises a welding torch body 311, a first adjusting member 312 and a second adjusting member 313. The first adjusting member 312 comprises a first moving member 3121 and a first mounting member 3122 connected to the adjusting mechanism 230, and the first moving member 3121 is movably arranged in the first mounting member 3122 along a direction parallel to the central axis a. The second adjusting member 313 comprises a second moving member 3131 connected to the welding torch body 311 and a second mounting member 3132 connected to one end of the first moving member 3121, and the second moving member 3131 is movably arranged in the second mounting member 3132 along a direction perpendicular to the central axis a.

[0115] The above-mentioned "first adjusting member 312" refers to a component capable of adjusting the welding torch 310 along the first direction F1. Alternatively, the first adjusting member 312 can be an adjusting rod or a sliding groove for adjustment, which is not limited herein. Similarly, the "second adjusting member 313" refers to a component capable of adjusting the welding torch 310 along the second direction F2. Alternatively, the second adjusting member 313 can be an adjusting seat or an adjusting rod, which is not limited herein. It can be understood that before welding, the first adjusting member 312 and the second adjusting member 313 can be manually adjusted to align the welding torch 310 with the middle of the valve sealing lip 30, so as to ensure the quality of the welded seam. Meanwhile, the existence of the first adjusting member 312 and the second adjusting member 313 improves the adaptability of the device as a whole, and the welding device 10 can be adapted to valves of different sizes by adjusting the first adjusting member 312 and the second adjusting member 313.

[0116] In some embodiments of the present application, referring to Figure 1 The welding mechanism 300 further comprises a wire feeding mechanism 700 connected to the walking mechanism 220, and the wire feeding mechanism 700 is used for feeding welding wire to the welding torch 310. Alternatively, the wire feeding mechanism 700 can be connected to the welding torch 310 through a wire feeding pipeline (not shown in the figure), so as to realize the feeding of welding wire to the welding torch 310.

[0117] In use, first, the walking mechanism 220 and the base 210 of the executing mechanism 200 are connected, then the adjusting mechanism 230 is fixed on the executing mechanism 200, and finally the welding mechanism 300 is connected to the adjusting mechanism 230. Secondly, the support mechanism 100 is fixed to the valve stem 20 through the threads on the valve stem 20, and then the executing mechanism 200 and the support mechanism 100 are fixed and connected, so that the welding device 10 is arranged around the valve stem 20 and can be used for valves in a narrow environment. After the connection is completed, the first adjusting member 312 and the second adjusting member 313 are manually adjusted, so that the welding torch 310 can be aligned with the middle of the valve sealing lip 30, and the quality of the welded seam is ensured. After the adjustment is completed, the driving members are started, and automatic welding is started.

[0118] In summary, the embodiment of the present application can fix the base 210 connected to the support mechanism 100 near the valve to be welded by installing the support mechanism 100 on the valve stem 20, and the support mechanism 100 can be adapted according to the size of the valve, and has strong versatility. The adjusting mechanism 230 on the walking mechanism 220 connected to the base 210 can rotate around the sealing lip 30 of the valve to be welded, so that the welding mechanism 300 connected to the adjusting mechanism 230 can be welded around the sealing lip 30 of the valve to be welded, and the welding quality is improved. Among them, since the required weld is a ring-shaped weld, the walking mechanism 220 can drive the adjusting mechanism 230 and the welding mechanism 300 to rotate around the center axis a of the valve stem 30, and can complete the automatic welding of the valve sealing lip 30 and obtain a ring-shaped weld, thereby improving the welding efficiency. At this time, the adjusting mechanism 230 and the welding mechanism 300 are both below the walking mechanism 220, and the space occupied is small. At the same time, the adjusting mechanism 230 can adjust the position of the welding mechanism 300 during welding, so that the welding mechanism 300 is in an optimal welding position, and the welding heat input can be accurately controlled, thereby improving the quality of the weld. And the existence of the first adjusting part 312 and the second adjusting part 313 also improves the adaptability of the device as a whole, and the welding device 10 can be adapted to valves of different sizes by adjusting the first adjusting part 312 and the second adjusting part 313. Therefore, by setting the support mechanism 100, the executing mechanism 200 and the welding mechanism 300 which cooperate with each other, the valve can be welded in a limited space, the welding efficiency is improved, and the needs of on-site maintenance are met.

[0119] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present disclosure.

[0120] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A welding apparatus for welding the sealing lip of a valve, characterized in that, The welding apparatus includes: A support mechanism for mounting on the valve stem; An actuator includes a base, a traveling mechanism, and an adjusting mechanism; the base is connected to the support mechanism, the traveling mechanism is disposed on the base, the traveling mechanism is connected to the adjusting mechanism, and is configured to drive the adjusting mechanism to rotate about the central axis of the valve stem; and A welding mechanism includes a welding torch connected to an adjustment mechanism, the welding torch being used to rotate around the central axis of the valve stem under the drive of the adjustment mechanism; The base has a first opening extending through a first direction, and the walking mechanism has a second opening extending through a first direction; the first opening and the second opening are constructed such that their orthographic projection outlines on the reference plane are open-loop shapes. The walking mechanism includes: A rotating component is disposed on the first side of the base; the rotating component is divided into a first rotating part and a second rotating part, the first rotating part is partially located inside the base, the second rotating part is fixedly connected to the first rotating part, and the adjusting mechanism is connected to the second rotating part; when the second opening is an open ring shape, there is a notch on the side of the rotating component; A transmission component, disposed within the base, is drively connected to the rotating component. A chain exceeding twice the circumference of the notch portion of the rotating component is installed between the rotating component and the transmission component, such that the output end of the transmission component drives the chain, which in turn drives the rotating component to rotate. Multiple transmission components are provided: one at each end of the chain, one in the middle for connection to the first driving component, and two on each side. A first driving member is disposed on the second side of the base and is used to drive the transmission member to rotate, thereby driving the rotating member to rotate; Wherein, the first side and the second side are opposite sides of the base along a direction parallel to the central axis, and the first side is closer to the valve than the second side; The outer periphery of the rotating component is provided with teeth, which mesh with the output end of the transmission component.

2. The welding apparatus according to claim 1, characterized in that, The supporting structure includes: A sleeve is used to fit onto the valve stem; A first fixing member is disposed at the first end of the sleeve, and the sleeve is fixed to the valve stem by means of the first fixing member; and A second fixing member is provided at the second end of the sleeve, and the sleeve is fixed to the base by means of the second fixing member; The walking mechanism and the adjusting mechanism are arranged around the outer periphery of the sleeve.

3. The welding apparatus according to claim 2, characterized in that, The welding device further includes a connector disposed at the second end; The connector can be placed over the first opening, and the connector can be connected to the base by means of the second fastener.

4. The welding apparatus according to claim 3, characterized in that, The connector is detachably connected to the second end of the sleeve.

5. The welding apparatus according to claim 2, characterized in that, The welding device further includes an adapter connected to the first end, and the valve stem extends through the adapter into the sleeve; The first fixing member is located on the side of the adapter opposite to the sleeve.

6. The welding apparatus according to claim 5, characterized in that, The valve stem is threaded on its outer periphery, and the first fixing element is a nut; The first fixing member is threadedly connected to the valve stem.

7. The welding apparatus according to claim 1, characterized in that, The adjustment mechanism includes a first adjustment component connected to the walking mechanism, and a second adjustment component connected between the first adjustment component and the welding torch; The first adjustment component is configured to drive the second adjustment component to reciprocate along a direction parallel to the central axis; The second adjustment component is configured to drive the welding torch to reciprocate in a direction perpendicular to the central axis.

8. The welding apparatus according to claim 7, characterized in that, The welding apparatus also includes a controller; The second adjustment component includes: A detection element, mounted on the welding torch and electrically connected to the controller, is used to detect the arc voltage during the welding process; and A second driving component is disposed on the second adjusting assembly and electrically connected to the controller; the second driving component is connected to the welding torch and can drive the welding torch to reciprocate along a direction perpendicular to the central axis; The controller is configured to control the action of the second drive element based on the arc voltage detected by the detector.

9. The welding apparatus according to claim 1, characterized in that, The welding torch includes: Welding torch body; A first adjusting member includes a first movable member and a first mounting member connected to the adjusting mechanism, wherein the first movable member is movably disposed within the first mounting member in a direction parallel to the central axis; and The second adjusting component includes a second moving component connected to the welding torch body and a second mounting component connected to one end of the first moving component. The second moving component is movably connected to the second mounting component in a direction perpendicular to the central axis.

10. The welding apparatus according to claim 1, characterized in that, The welding mechanism also includes a wire feeding mechanism connected to the traveling mechanism; The wire feeding mechanism is used to feed welding wire to the welding gun.

Images