A welding device and method for welding a spacer sleeve on a packer body

Abstract

The present invention discloses a welding device and method for welding a spacer on a packer body, and the present invention relates to the technical field of welding two straight pipes on a packer body. A clamping mechanism for fixing the packer body with a tool and a feeding mechanism for positioning and rotating two spacers are arranged on a workbench; the feeding mechanism comprises a base fixed on the workbench, a conveying oil cylinder fixed on the right end surface of the base, and positioning components for positioning the spacer and annular solder sheet are arranged on the upper and lower sides of the rotating plate; a side push mechanism located directly below the feeding mechanism is also arranged on the workbench; a lower wrapping and welding mechanism for wrapping the lower edge of the annular solder sheet is arranged on the workbench, and an upper wrapping and welding mechanism for wrapping the upper edge of the annular solder sheet is arranged on the base. The beneficial effects of the present invention are: greatly improving the efficiency of welding the spacer on the packer body and greatly improving the welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of welding two straight pipes on a packer body, in particular to a welding device and method for welding a spacer sleeve on a packer body. Background Art

[0002] In the process of oil extraction, a wellbore is usually installed in the wellhead, and the wellbore is fixed in the well by a packer. A certain type of packer includes a packer body and a working part installed in the packer body. Among them, the structure of the packer body is as follows Figure 1~Figure 2 As shown, it includes a tube body 1, and straight tubes 2 respectively fixed on the left and right end surfaces of the tube body 1, the two straight tubes 2 are connected to the tube body 1, the two straight tubes 2 are coaxially arranged with the tube body 1, and a shoulder surface 3 is formed between the two straight tubes 2 and the tube body 1.

[0003] When a batch of packer bodies are produced in the workshop, the process requires welding two spacers on the packer body, that is, it is required to weld a spacer 4 on each of the two straight pipes 2 of the packer body. The structure of the product obtained after welding is as follows: Figure 3 As shown, the specific welding method is:

[0004] S1. The worker takes out a packer body and puts a packer body on the two straight pipes 2 of the packer body. Figure 4~Figure 5 The annular solder sheet 5 shown in the figure is ensured to be against the shoulder surface 3, wherein the outer diameter of the annular solder sheet 5 is equal to the outer diameter of the pipe body 1 of the packer body, and the structure of the annular solder sheet is set on both straight pipes 2 as shown in the figure Figure 6 As shown;

[0005] S2. Workers put a seal on the two straight pipes 2 of the packer body. Figure 7~Figure 8 The spacer 4 shown, and ensuring that the spacer 4 rests on the annular solder sheet 5, wherein the outer diameter of the spacer 4 is greater than the outer diameter of the tubular body 1 of the packer body;

[0006] S3. The worker puts a retaining ring 6 with interference fit on the two straight pipes 2 of the packer body, and ensures that the retaining ring 6 is against the spacer 4. The function of the retaining ring 6 is to fix the annular solder sheet 5 and the spacer 4 between the shoulder surface 3 and the retaining ring 6, and to make the shoulder surface 3, the annular solder sheet 5 and the spacer 4 contact. The structure after the retaining rings are put on the two straight pipes 2 is as follows: Fig. 9 As shown;

[0007] S4, the worker puts the packer body, two spacers 4 and the retaining ring 6 into the heating box, and the heating box heats the spacer 4, the pipe body 1, the straight pipe 2 and the annular solder sheet 5. When the annular solder sheet 5 is heated, the annular solder sheet 5 welds the spacer 4 to the pipe body 1 of the packer body, thereby realizing the welding of the spacer 4 to the straight pipe 2;

[0008] S5. The worker removes the retaining ring 6 from the straight pipe 2. After removal, the following is obtained: Figure 3 Products shown;

[0009] S6. The worker repeats the operations of steps S1 to S5 to continuously weld two spacers 4 on multiple packer bodies, thereby obtaining multiple required products.

[0010] However, the welding method used in the workshop, although it can weld a spacer 4 on each of the two straight pipes 2 of the packer body, still has the following technical defects in actual operation:

[0011] I. Among them, in steps S3 to S5, workers are required to install a retaining ring 6 with an interference fit on the straight pipe 2 to fix the annular solder sheet 5 and the spacer 4 between the shoulder surface 3 of the packer body and the retaining ring 6; then the retaining ring 6 on the straight pipe 2 is manually removed, and then two spacers 4 can be welded on the packer body to obtain the product; and the whole welding method undoubtedly increases the welding process, resulting in a long time required to weld two spacers 4 on a packer body, thereby reducing the efficiency of welding the spacers 4 on the packer body.

[0012] II. In step S4, since the outer edge of the annular solder sheet 5 is exposed to the outside, when the heating box heats the spacer 4, the pipe body 1, the straight pipe 2 and the annular solder sheet 5, the outer edge material of the annular solder sheet 5 will partially fall off, causing the spacer 4 to not be fully welded to the straight pipe 2, resulting in the spacer 4 not being firmly welded to the straight pipe 2 of the enclosure body, and there is a technical defect of low welding quality.

[0013] Therefore, there is an urgent need for a welding device and method that can greatly improve the efficiency of welding a spacer on a packer body and greatly improve the welding quality. Summary of the invention

[0014] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a welding device and method for welding a spacer on a packer body, which greatly improves the efficiency of welding a spacer on a packer body and greatly improves the welding quality.

[0015] The object of the present invention is achieved by the following technical solutions: A welding device for welding a spacer sleeve on a packer body, comprising a workbench, on which a clamping mechanism for tooling to fix the packer body and a feeding mechanism for positioning and rotating two spacers are arranged;

[0016] The feeding mechanism is located on the right side of the clamping mechanism, and includes a base fixedly mounted on the workbench, a conveying oil cylinder fixedly mounted on the right end surface of the base, a piston rod of the conveying oil cylinder passes through the base to the left, and a driving motor is fixedly mounted on the extended end, a rotating plate is mounted on the output shaft of the driving motor, and positioning components for positioning the spacer and the annular solder sheet are arranged on the upper and lower sides of the rotating plate;

[0017] The positioning assembly located at the lower side of the rotating plate includes a guide cylinder fixedly arranged on the left end surface of the rotating plate, a disc slidably installed in the guide cylinder, a positioning column extending to the left outside the guide cylinder is fixedly arranged on the left end surface of the disc, a rod member penetrating the rotating plate to the right is fixedly arranged on the right end surface of the disc, a first roller is rotatably installed on the right end portion of the rod member, a connecting plate is welded on the rod member, a first spring sleeved on the rod member is fixedly arranged on the connecting plate, the other end of the first spring is fixedly arranged on the right end surface of the rotating plate, and under the elastic force of the first spring, the disc rests on the rotating plate; a push rod located directly below the rod member is slidably penetrated in the lower end portion of the connecting plate, the left end portion of the push rod penetrates the rotating plate to the left and extends into the disc, a second roller is rotatably installed on the right end portion of the push rod, a fixing plate is welded on the push rod, a second spring sleeved on the push rod is fixedly arranged on the fixing plate, and the other end of the second spring is fixedly arranged on the connecting plate;

[0018] The workbench is also provided with a side push mechanism located directly below the loading mechanism, the side push mechanism includes a jacking cylinder fixedly arranged on the bottom surface of the workbench, a piston rod of the jacking cylinder passes through the workbench upward, and a jacking plate is fixedly arranged on the extended end, and a second wedge block and a first wedge block are fixedly arranged on the top surface of the jacking plate;

[0019] The workbench is provided with a lower wrapping and welding mechanism for wrapping the lower edge of the annular solder sheet, and the base is provided with an upper wrapping and welding mechanism for wrapping the upper edge of the annular solder sheet.

[0020] The clamping mechanism includes a stepper motor fixed on the top surface of the workbench and a frame fixed on the output shaft of the stepper motor. A lower V-shaped seat is fixed on the bottom wall of the frame, and a clamping cylinder is fixed on the top wall of the frame. The piston rod of the clamping cylinder penetrates downward through the top wall of the frame and extends into the frame, and an upper V-shaped seat is fixed on the extended end of the piston rod of the clamping cylinder.

[0021] The two positioning components of the feeding mechanism are symmetrically arranged up and down.

[0022] A connecting frame is fixedly arranged on the piston rod of the conveying oil cylinder, and the driving motor is fixedly arranged on the top surface of the connecting frame.

[0023] The first wedge surface of the first wedge block is parallel to the second wedge surface of the second wedge block.

[0024] The lower wrapping and welding mechanism includes a first lifting cylinder fixed on the bottom surface of the workbench, the piston rod of the first lifting cylinder penetrates the workbench upward, and a lower heating block is fixed on the extending end, a plurality of heating rods are fixed in the lower heating block, a lower clamping block is fixed on the top surface of the lower heating block, and a semicircular step hole is opened on the top surface of the lower clamping block.

[0025] The upper wrapping and welding mechanism includes a horizontal plate fixed on the top of the base and extending to the left, a second lifting cylinder fixed on the extended end of the horizontal plate, the piston rod of the second lifting cylinder penetrates downward through the horizontal plate, and an upper heating block is fixed on the extended end, a plurality of heating rods are fixed in the upper heating block, an upper clamping block is fixed on the bottom surface of the upper heating block, and a semicircular step hole is opened on the bottom surface of the upper clamping block.

[0026] The large hole of the semicircular step hole is directly equal to the outer diameter of the spacer sleeve, and the small hole of the semicircular step hole is equal to the outer diameter of the pipe body of the packer body.

[0027] The welding device also includes a controller, which is electrically connected to the conveying cylinder, the pressing cylinder, the lifting cylinder, the first lifting cylinder, the second lifting cylinder, the driving motor and the stepping motor via a signal line.

[0028] A welding method for welding a spacer sleeve on a packer body comprises the following steps:

[0029] S1. Clamping and fixing of the packer body. The specific operation steps are as follows:

[0030] S11. The worker takes out a packer body, inserts the pipe body of the packer body into the frame of the clamping mechanism, and supports the middle part of the bottom surface of the pipe body in the V-shaped groove of the lower V-shaped seat;

[0031] S12, the piston rod of the clamping cylinder of the control clamping mechanism is extended downward, the piston rod drives the upper V-shaped seat to move downward, and the V-shaped groove of the upper V-shaped seat moves toward the top surface of the tube body of the packer body. When the piston rod of the clamping cylinder is fully extended, the tube body of the packer body is just clamped between the upper V-shaped seat and the lower V-shaped seat, thereby achieving clamping and fixing of the packer body;

[0032] S2. Position a spacer and an annular solder sheet in each of the two positioning components of the feeding mechanism. The specific operation steps are as follows:

[0033] S21, the worker takes out a spacer and an annular solder sheet, and puts the spacer on the positioning column of the positioning assembly on the lower side from left to right, and ensures that it leans against the disc, and then puts the annular solder sheet on the positioning column, and ensures that the annular solder sheet leans against the spacer, thereby achieving the positioning of the spacer and the annular solder sheet in the positioning assembly on the lower side. At this time, the annular solder sheet and the spacer in the positioning assembly on the lower side are both facing the first straight pipe on the packer body;

[0034] S22, the worker repeats the operation of step S21 once, so as to position a spacer and an annular solder sheet in the upper positioning assembly, and finally positions a spacer and an annular solder sheet in both positioning assemblies of the feeding mechanism;

[0035] S3. Weld a spacer sleeve on the first straight pipe of the packer body. The specific operation steps are as follows:

[0036] S31, the piston rod of the conveying cylinder of the control feeding mechanism is extended to the left, and the piston rod drives the driving motor, the rotating plate and the two positioning components to move to the left synchronously, thereby driving the annular solder sheet and the spacer in the positioning component to move to the left synchronously. When the piston rod of the conveying cylinder is fully extended, the positioning column of the positioning component on the lower side is just close to the first straight pipe of the packer body, and at the same time, the first roller is just located above the first wedge surface of the first wedge block;

[0037] S32, controlling the piston rod of the lifting cylinder of the side thrust mechanism to extend upward, the piston rod drives the lifting plate to move upward, the lifting plate drives the first wedge block and the second wedge block to move upward synchronously, and the first wedge surface of the first wedge block first contacts the first roller on the rod member;

[0038] As the first wedge block and the second wedge block continue to move upward, the first wedge block pushes the first roller to move leftward, the first roller drives the rod to move leftward, the rod drives the connecting plate and the disc to move leftward synchronously, wherein the connecting plate compresses the first spring, the connecting plate also drives the second spring, the fixing plate and the push rod to move leftward synchronously, and the disc drives the positioning column, the annular solder sheet and the spacer sleeve mounted on the positioning column to move leftward at the same time; when the first roller separates from the first wedge surface and contacts the left end surface of the first wedge block, the left end surface of the positioning column just contacts the right end surface of the first straight pipe of the packer body, and at this time, the second roller just contacts the second wedge surface of the second wedge block;

[0039] As the first wedge block and the second wedge block continue to move upward, the second wedge block pushes the second roller to move leftward, the second roller drives the push rod to move leftward, the left end of the push rod pushes the spacer sleeve and the annular solder sheet on the positioning column to the left, the spacer sleeve and the annular solder sheet both move toward the straight pipe, and at the same time, the push rod also drives the fixed plate to move leftward synchronously, and the fixed plate gradually compresses the second spring relative to the stationary connecting plate; when the second roller separates from the second wedge surface and contacts with the left end surface of the second wedge block, the annular solder sheet and the spacer sleeve are just fixed between the shoulder surface of the packer body and the push rod, and the shoulder surface, the annular solder sheet and the spacer sleeve are in contact;

[0040] S33, the piston rod of the first lifting cylinder controlling the lower wrapping and welding mechanism extends upward, the piston rod drives the lower heating block to move upward, the lower heating block drives the lower clamping block and the heating rod located in the lower heating block to move upward synchronously, when the piston rod of the first lifting cylinder is fully extended, the large hole of the semicircular step hole of the lower clamping block covers the lower half of the spacer sleeve, and at the same time, the small hole of the semicircular step hole of the lower clamping block covers the lower half of the annular solder sheet;

[0041] S34, the piston rod of the second lifting cylinder controlling the upper wrapping and welding mechanism extends downward, the piston rod drives the upper heating block to move downward, the upper heating block drives the upper clamping block and the heating rod located in the upper heating block to move downward synchronously, when the piston rod of the second lifting cylinder is fully extended, the large hole of the semicircular step hole in the upper clamping block covers the upper half of the spacer, and at the same time, the small hole of the semicircular step hole of the upper clamping block covers the upper half of the annular solder sheet;

[0042] S35, connecting the joints of each heating rod in the lower heating block to the power supply, when the heating rod is powered on, heat is generated on the heating rod, and the heat is sequentially transferred to the annular solder sheet through the lower heating block and the lower clamping block; connecting the joints of each heating rod in the upper heating block to the power supply, when the heating rod is powered on, heat is generated on the heating rod, and the heat is sequentially transferred to the annular solder sheet through the upper heating block and the upper clamping block; after the annular solder sheet is heated for a period of time, the annular solder sheet welds the spacer to the pipe body of the packer body, thereby finally achieving the welding of a spacer on the first straight pipe of the packer body;

[0043] S36, after a spacer is welded on the first straight pipe of the packer body, the piston rod of the first lifting cylinder of the lower wrapping and welding mechanism is controlled to retract downward to reset the lower heating block and the lower clamping block; at the same time, the piston rod of the second lifting cylinder of the upper wrapping and welding mechanism is controlled to retract upward to reset the upper heating block and the upper clamping block;

[0044] Then, the piston rod of the lifting cylinder of the side thrust mechanism is controlled to retract downward, and the piston rod drives the lifting plate to move downward, and the lifting plate drives the first wedge block and the second wedge block to move downward synchronously. When the first wedge block and the second wedge block are moving downward, under the elastic restoring force of the first spring, the first spring drives the rod, the first roller and the disc to reset, and the disc re-enters the guide cylinder. At the same time, under the elastic restoring force of the second spring, the second spring drives the push rod and the second roller to reset.

[0045] Then the piston rod of the conveying cylinder of the feeding mechanism is controlled to retract to the right, the piston rod drives the driving motor and the rotating plate to move to the right synchronously, and the rotating plate drives the two positioning components thereon to move to the right synchronously;

[0046] S4, the stepper motor of the control clamping mechanism is started, the stepper motor drives the frame to rotate, and the frame drives the packer body clamped therein to rotate synchronously. When the packer body rotates horizontally by 180°, the controller controls the stepper motor to be turned off. At this time, the second straight pipe on the packer body faces right. Then, the driving motor of the control feeding mechanism is started, the driving motor drives the rotating plate to rotate, and the rotating plate drives the two positioning components thereon to rotate synchronously. When the upper positioning component rotates vertically by 180°, the controller controls the driving motor to be turned off. At this time, the annular solder sheet and the spacer in the positioning component face the second straight pipe on the packer body.

[0047] S5. The worker repeats the operation of step S3 once, and a spacer sleeve is welded on the second straight pipe of the packer body, thereby finally welding two spacers on the packer body, thereby obtaining the desired product;

[0048] S6. Product removal: The worker controls the piston rod of the clamping cylinder of the clamping mechanism to retract upward, and the piston rod drives the upper V-shaped seat to move upward. When the upper V-shaped seat is separated from the tube body of the product, the worker takes the product away;

[0049] S7. The worker repeats the operations of steps S1 to S6 for multiple times, and can continuously weld two spacers on multiple packer bodies, thereby obtaining multiple required products.

[0050] The invention has the following advantages: the efficiency of welding the spacer on the packer body is greatly improved, and the welding quality is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is an axonometric view of the packer body;

[0052] Figure 2 for Figure 1 The main cross-sectional diagram of

[0053] Figure 3 It is a schematic diagram of the product structure;

[0054] Figure 4 is an axonometric view of an annular solder sheet;

[0055] Figure 5 for Figure 4 The main cross-sectional diagram of

[0056] Figure 6 The schematic diagram is a diagram of putting annular solder sheets on two straight tubes;

[0057] Figure 7 This is the axonometric drawing of the spacer;

[0058] Figure 8 for Figure 7 The main cross-sectional diagram of

[0059] Fig. 9 This is a schematic diagram of mounting retaining rings on two straight pipes;

[0060] Fig.10 It is a structural schematic diagram of the present invention;

[0061] Fig.11 for Fig.10 The main cross-sectional diagram of

[0062] Fig.12 It is an axonometric view of the clamping mechanism;

[0063] Fig.13 for Fig.12 The main cross-sectional diagram of

[0064] Fig.14 This is the axonometric drawing of the feeding mechanism;

[0065] Fig.15 for Fig.14 The main cross-sectional diagram of

[0066] Fig.16 This is the axonometric view of the thrust mechanism;

[0067] Fig.17 for Fig.16 The main view;

[0068] Fig.18 It is the axonometric drawing of the lower package and welding mechanism;

[0069] Fig.19 This is the axonometric drawing of the upper package and welding mechanism;

[0070] Fig. 20 A schematic diagram for clamping and fixing the packer body;

[0071] Fig.21 It is a schematic diagram that the annular solder sheet and the spacer in the positioning assembly on the lower side are both facing the first straight tube;

[0072] Fig. 22 is a schematic diagram showing that the first roller is located directly above the first wedge surface of the first wedge block;

[0073] Fig.23 is a schematic diagram of the first wedge surface of the first wedge block contacting with the first roller on the rod;

[0074] Fig.24 It is a schematic diagram showing that the left end surface of the positioning column is in contact with the right end surface of the first straight pipe of the packer body;

[0075] Fig.25 The schematic diagram is that the left end of the push rod pushes the spacer sleeve and the annular solder sheet on the positioning column to the left;

[0076] Fig.26 A schematic diagram showing that the small hole of the semicircular step hole of the lower clamping block covers the lower half of the annular solder sheet;

[0077] Fig. 27 A schematic diagram showing the driving motor and the rotating plate moving synchronously to the right;

[0078] Fig.28 A schematic diagram showing that the annular solder sheet and the spacer in the positioning assembly are both facing the second straight tube;

[0079] Fig.29 A schematic diagram of workers taking the product away;

[0080] In the figure:

[0081] 1-tube body, 2-straight tube, 3-shoulder surface, 4-spacer, 5-annular solder sheet, 6-retaining ring;

[0082] 7-working table, 8-clamping mechanism, 9-feeding mechanism, 10-transporting cylinder, 11-driving motor, 12-rotating plate;

[0083] 13-positioning assembly, 14-guide cylinder, 15-disc, 16-positioning column, 17-rod, 18-first roller, 19-connecting plate, 20-first spring, 21-push rod, 22-second roller, 23-fixing plate, 24-second spring;

[0084] 25-side thrust mechanism, 26-lifting cylinder, 27-second wedge block, 28-first wedge block, 29-first wedge surface, 30-second wedge surface;

[0085] 31-lower wrapping and welding mechanism, 32-upper wrapping and welding mechanism, 33-stepping motor, 34-frame, 35-lower V-shaped seat, 36-pressing cylinder, 37-upper V-shaped seat;

[0086] 38-first lifting cylinder, 39-lower heating block, 40-heating rod, 41-lower clamping block, 42-semicircular step hole, 43-second lifting cylinder, 44-upper heating block, 45-upper clamping block. DETAILED DESCRIPTION

[0087] The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0088] like Figure 10~Figure 19 As shown, a welding device for welding a spacer sleeve on a packer body comprises a workbench 7, on which a clamping mechanism 8 for fixing the packer body and a feeding mechanism 9 for positioning and rotating two spacers 4 are arranged;

[0089] The feeding mechanism 9 is located on the right side of the clamping mechanism 8. The feeding mechanism 9 includes a base fixed on the workbench 7 and a conveying cylinder 10 fixed on the right end surface of the base. The piston rod of the conveying cylinder 10 passes through the base to the left, and a driving motor 11 is fixed on the extended end. A rotating plate 12 is installed on the output shaft of the driving motor 11. The upper and lower sides of the rotating plate 12 are provided with positioning components 13 for positioning the spacer 4 and the annular solder sheet 5. The two positioning components 13 of the feeding mechanism 9 are symmetrically arranged up and down. A connecting frame is fixed on the piston rod of the conveying cylinder 10, and the driving motor 11 is fixed on the top surface of the connecting frame.

[0090] The positioning assembly 13 located at the lower side of the rotating plate 12 includes a guide cylinder 14 fixedly mounted on the left end surface of the rotating plate 12, a disc 15 slidably mounted in the guide cylinder 14, a positioning column 16 extending to the left outside the guide cylinder 14 is fixedly mounted on the left end surface of the disc 15, a rod 17 penetrating the rotating plate 12 to the right is fixedly mounted on the right end surface of the disc 15, a first roller 18 is rotatably mounted on the right end of the rod 17, a connecting plate 19 is welded on the rod 17, a first spring 20 sleeved on the rod 17 is fixedly mounted on the connecting plate 19, and another end of the first spring 20 is fixedly mounted on the rod 17. The end is fixed on the right end surface of the rotating plate 12. Under the elastic force of the first spring 20, the disc 15 rests on the rotating plate 12. A push rod 21 located directly below the rod 17 is slidably penetrated in the lower end of the connecting plate 19. The left end of the push rod 21 penetrates the rotating plate 12 to the left and extends into the disc 15. A second roller 22 is rotatably mounted on the right end of the push rod 21. A fixing plate 23 is welded on the push rod 21. A second spring 24 sleeved on the push rod 21 is fixed on the fixing plate 23. The other end of the second spring 24 is fixed on the connecting plate 19.

[0091] The workbench 7 is also provided with a side push mechanism 25 located directly below the feeding mechanism 9. The side push mechanism 25 includes a lifting cylinder 26 fixedly mounted on the bottom surface of the workbench 7. The piston rod of the lifting cylinder 26 penetrates the workbench 7 upward, and a lifting plate is fixedly mounted on the extended end. A second wedge block 27 and a first wedge block 28 are fixedly mounted on the top surface of the lifting plate. The first wedge surface 29 of the first wedge block 28 is parallel to the second wedge surface 30 of the second wedge block 27.

[0092] The clamping mechanism 8 includes a stepper motor 33 fixed on the top surface of the workbench 7, and a frame 34 fixed on the output shaft of the stepper motor 33. A lower V-shaped seat 35 is fixed on the bottom wall of the frame 34, and a clamping cylinder 36 is fixed on the top wall of the frame 34. The piston rod of the clamping cylinder 36 penetrates downward through the top wall of the frame 34 and extends into the frame 34. An upper V-shaped seat 37 is fixed on the extended end of the piston rod of the clamping cylinder 36.

[0093] The workbench 7 is provided with a lower wrapping and welding mechanism 31 for wrapping the lower edge of the annular solder sheet 5, and the base is provided with an upper wrapping and welding mechanism 32 for wrapping the upper edge of the annular solder sheet 5. The lower wrapping and welding mechanism 31 includes a first lifting cylinder 38 fixedly arranged on the bottom surface of the workbench 7, the piston rod of the first lifting cylinder 38 passes through the workbench 7 upward, and a lower heating block 39 is fixedly arranged on the extended end, a plurality of heating rods 40 are fixedly arranged in the lower heating block 39, a lower clamping block 41 is fixedly arranged on the top surface of the lower heating block 39, and a semicircular step hole 42 is opened on the top surface of the lower clamping block 41.

[0094] The upper wrapping and welding mechanism 32 includes a horizontal plate fixed on the top of the base and extending to the left, and a second lifting cylinder 43 fixed on the extended end of the horizontal plate. The piston rod of the second lifting cylinder 43 passes through the horizontal plate downward, and an upper heating block 44 is fixed on the extended end. A plurality of heating rods 40 are fixed in the upper heating block 44. An upper clamping block 45 is fixed on the bottom surface of the upper heating block 44. A semicircular step hole 42 is opened on the bottom surface of the upper clamping block 45. The large hole of the semicircular step hole 42 is directly equal to the outer diameter of the spacer sleeve 4, and the small hole of the semicircular step hole 42 is equal to the outer diameter of the pipe body 1 of the packer body.

[0095] The welding device also includes a controller, which is electrically connected to the conveying cylinder 10, the clamping cylinder 36, the lifting cylinder 26, the first lifting cylinder 38, the second lifting cylinder 43, the drive motor 11 and the stepper motor 33 via a signal line. The worker can control the extension or retraction of the piston rods of the conveying cylinder 10, the clamping cylinder 36, the lifting cylinder 26, the first lifting cylinder 38 and the second lifting cylinder 43 through the controller, and can also control the start or shut down of the drive motor 11 and the stepper motor 33, which facilitates the worker's operation and has the characteristics of a high degree of automation.

[0096] A welding method for welding a spacer sleeve on a packer body comprises the following steps:

[0097] S1. Clamping and fixing of the packer body. The specific operation steps are as follows:

[0098] S11, the worker takes out a Figure 1~Figure 2 The packer body shown has the pipe body 1 of the packer body inserted into the frame 34 of the clamping mechanism 8, and the middle part of the bottom surface of the pipe body 1 supported in the V-shaped groove of the lower V-shaped seat 35;

[0099] S12, the piston rod of the clamping cylinder 36 of the control clamping mechanism 8 extends downward, the piston rod drives the upper V-shaped seat 37 to move downward, and the V-shaped groove of the upper V-shaped seat 37 moves toward the top surface of the pipe body 1 of the packer body. When the piston rod of the clamping cylinder 36 is fully extended, the pipe body 1 of the packer body is just clamped between the upper V-shaped seat 37 and the lower V-shaped seat 35, thereby achieving the clamping and fixing of the packer body. Fig. 20 As shown;

[0100] S2. Position a spacer 4 and an annular solder sheet 5 in each of the two positioning components 13 of the feeding mechanism 9. The specific operation steps are as follows:

[0101] S21, the worker takes out a spacer sleeve 4 and an annular solder sheet 5, and puts the spacer sleeve 4 on the positioning column 16 of the lower positioning component 13 from left to right, and ensures that it leans against the disc 15, and then puts the annular solder sheet 5 on the positioning column 16, ensuring that the annular solder sheet 5 leans against the spacer sleeve 4, thereby achieving the positioning of a spacer sleeve 4 and an annular solder sheet 5 in the lower positioning component 13. At this time, the annular solder sheet 5 and the spacer sleeve 4 in the lower positioning component 13 are both facing the first straight pipe 2 on the packer body, as shown in FIG. Fig.21 As shown;

[0102] S22, the worker repeats the operation of step S21 once, so as to position a spacer sleeve 4 and an annular solder sheet 5 in the upper positioning assembly 13, and finally positions a spacer sleeve 4 and an annular solder sheet 5 in both positioning assemblies 13 of the feeding mechanism 9;

[0103] S3. Weld a spacer sleeve 4 on the first straight pipe 2 of the packer body. The specific operation steps are as follows:

[0104] S31, control the piston rod of the conveying cylinder 10 of the feeding mechanism 9 to extend to the left, and the piston rod drives the driving motor 11, the rotating plate 12 and the two positioning components 13 to move to the left synchronously, thereby driving the annular solder sheet 5 and the spacer 4 in the positioning component 13 to move to the left synchronously. When the piston rod of the conveying cylinder 10 is fully extended, the positioning column 16 of the positioning component 13 on the lower side is just close to the first straight pipe 2 of the packer body. At the same time, the first roller 18 is just located above the first wedge surface 29 of the first wedge block 28, as shown in FIG. Fig. 22 As shown;

[0105] S32, the piston rod of the lifting cylinder 26 of the side thrust mechanism 25 is extended upward, the piston rod drives the lifting plate to move upward, the lifting plate drives the first wedge block 28 and the second wedge block 27 to move upward synchronously, the first wedge surface 29 of the first wedge block 28 first contacts the first roller 18 on the rod 17, as shown in FIG. Fig.23 As shown;

[0106] As the first wedge block 28 and the second wedge block 27 continue to move upward, the first wedge block 28 pushes the first roller 18 to move leftward, the first roller 18 drives the rod 17 to move leftward, the rod 17 drives the connecting plate 19 and the disc 15 to move leftward synchronously, wherein the connecting plate 19 compresses the first spring 20, the connecting plate 19 also drives the second spring 24, the fixing plate 23 and the push rod 21 to move leftward synchronously, and the disc 15 drives the positioning column 16, the annular solder sheet 5 sleeved on the positioning column 16 and the spacer 4 to move leftward at the same time; when the first roller 18 separates from the first wedge surface 29 and contacts the left end face of the first wedge block 28, the left end face of the positioning column 16 just contacts the right end face of the first straight pipe 2 of the packer body, as shown in FIG. Fig.24 As shown, at this time, the second roller 22 just contacts the second wedge surface 30 of the second wedge block 27;

[0107] As the first wedge block 28 and the second wedge block 27 continue to move upward, the second wedge block 27 pushes the second roller 22 to move leftward, and the second roller 22 drives the push rod 21 to move leftward, and the left end of the push rod 21 pushes the spacer 4 and the annular solder sheet 5 on the positioning column 16 to the left. Fig.25 As shown, the spacer sleeve 4 and the annular solder sheet 5 both move toward the straight pipe 2, and at the same time, the push rod 21 also drives the fixed plate 23 to move synchronously to the left, and the fixed plate 23 gradually compresses the second spring 24 relative to the stationary connecting plate 19; when the second roller 22 separates from the second wedge surface 30 and contacts the left end surface of the second wedge block 27, the annular solder sheet 5 and the spacer sleeve 4 are just fixed between the shoulder surface 3 of the packer body and the push rod 21, and the shoulder surface 3, the annular solder sheet 5 and the spacer sleeve 4 are in contact;

[0108] S33, control the piston rod of the first lifting cylinder 38 of the lower wrapping and welding mechanism 31 to extend upward, the piston rod drives the lower heating block 39 to move upward, the lower heating block 39 drives the lower clamping block 41 and the heating rod 40 located in the lower heating block 39 to move upward synchronously, when the piston rod of the first lifting cylinder 38 is fully extended, the large hole of the semicircular step hole 42 of the lower clamping block 41 covers the lower half of the spacer 4, and at the same time, the small hole of the semicircular step hole 42 of the lower clamping block 41 covers the lower half of the annular solder sheet 5, as shown in FIG. Fig.26 As shown;

[0109] S34, the piston rod of the second lifting cylinder 43 controlling the upper wrapping and welding mechanism 32 extends downward, and the piston rod drives the upper heating block 44 to move downward, and the upper heating block 44 drives the upper clamping block 45 and the heating rod 40 located in the upper heating block 44 to move downward synchronously. When the piston rod of the second lifting cylinder 43 is fully extended, the large hole of the semicircular step hole 42 in the upper clamping block 45 covers the upper half of the spacer 4, and at the same time, the small hole of the semicircular step hole 42 in the upper clamping block 45 covers the upper half of the annular solder sheet 5. Fig.26 As shown;

[0110] S35, connecting the joints of each heating rod 40 in the lower heating block 39 to the power supply, when the heating rod 40 is powered on, heat is generated on the heating rod 40, and the heat is sequentially transferred to the annular solder sheet 5 through the lower heating block 39 and the lower clamping block 41; connecting the joints of each heating rod 40 in the upper heating block 44 to the power supply, when the heating rod 40 is powered on, heat is generated on the heating rod 40, and the heat is sequentially transferred to the annular solder sheet 5 through the upper heating block 44 and the upper clamping block 45; after the annular solder sheet 5 is heated for a period of time, the annular solder sheet 5 welds the spacer 4 to the pipe body 1 of the packer body, thereby finally realizing the welding of a spacer 4 on the first straight pipe 2 of the packer body;

[0111] S36, after a spacer sleeve 4 is welded on the first straight pipe 2 of the packer body, the piston rod of the first lifting cylinder 38 of the lower wrapping and welding mechanism 31 is controlled to retract downward to reset the lower heating block 39 and the lower clamping block 41; at the same time, the piston rod of the second lifting cylinder 43 of the upper wrapping and welding mechanism 32 is controlled to retract upward to reset the upper heating block 44 and the upper clamping block 45;

[0112] Then, the piston rod of the lifting cylinder 26 of the side thrust mechanism 25 is controlled to retract downward, and the piston rod drives the lifting plate to move downward, and the lifting plate drives the first wedge block 28 and the second wedge block 27 to move downward synchronously. When the first wedge block 28 and the second wedge block 27 are moving downward, under the elastic restoring force of the first spring 20, the first spring 20 drives the rod 17, the first roller 18 and the disc 15 to reset, and the disc 15 re-enters the guide cylinder 14. At the same time, under the elastic restoring force of the second spring 24, the second spring 24 drives the push rod 21 and the second roller 22 to reset.

[0113] Then the piston rod of the conveying cylinder 10 of the feeding mechanism 9 is controlled to retract to the right, and the piston rod drives the driving motor 11 and the rotating plate 12 to move to the right synchronously, such as Fig. 27 As shown, the rotating plate 12 drives the two positioning assemblies 13 thereon to move rightward synchronously;

[0114] Among them, it can be seen from step S32 that the worker only needs to control the piston rod of the lifting cylinder 26 of the side push mechanism 25 to extend upward, and the annular solder sheet 5 and the spacer 4 in the positioning assembly 13 can be automatically fixed between the shoulder surface 3 of the packer body and the push rod 21 through the push rod 21, so that the straight pipe 2, the annular solder sheet 5 and the spacer 4 can directly enter the welding station. It can be seen that compared with the welding device of the present invention, Fig. 9 The welding method shown does not require workers to install a retaining ring 6 with an interference fit on the straight pipe 2 to fix the annular solder sheet 5 and the spacer 4 between the shoulder surface 3 of the packer body and the retaining ring 6, nor does it require workers to manually remove the retaining ring 6 after welding, thereby eliminating the steps of installing and removing the retaining ring 6, and further achieving the welding of two spacers 4 on a packer body in a short time, thereby greatly improving the efficiency of welding the spacers 4 on the packer body.

[0115] S4, control the stepper motor 33 of the clamping mechanism 8 to start, the stepper motor 33 drives the frame 34 to rotate, and the frame 34 drives the packer body clamped therein to rotate synchronously. When the packer body rotates horizontally by 180°, the controller controls the stepper motor 33 to turn off. At this time, the second straight pipe 2 on the packer body faces right; then, control the drive motor 11 of the feeding mechanism 9 to start, the drive motor 11 drives the rotating plate 12 to rotate, and the rotating plate 12 drives the two positioning components 13 thereon to rotate synchronously. When the upper positioning component 13 rotates vertically by 180°, the controller controls the drive motor 11 to turn off. At this time, the annular solder sheet 5 and the spacer sleeve 4 in the positioning component 13 are both facing the second straight pipe 2 on the packer body, as shown in FIG. Fig.28 As shown;

[0116] S5, the worker repeats the operation of step S3 once, and then welds a spacer 4 on the second straight pipe 2 of the packer body, thereby finally achieving welding of two spacers 4 on the packer body, thereby obtaining the desired product, the structure of which is as follows: Figure 3 As shown;

[0117] S6. Product removal: The worker controls the piston rod of the clamping cylinder 36 of the clamping mechanism 8 to retract upward, and the piston rod drives the upper V-shaped seat 37 to move upward. When the upper V-shaped seat 37 is separated from the tube body 1 of the product, the worker takes the product away. The direction of removal is as follows: Fig.29 As indicated by the arrow;

[0118] S7. The worker repeats the operations of steps S1 to S6 for multiple times, and can continuously weld two spacers 4 on multiple packer bodies, thereby obtaining multiple required products.

[0119] Among them, it can be known from steps S33 to S35 that the large hole of the semicircular step hole 42 of the lower clamping block 41 covers the lower half of the spacer 4, and the small hole of the semicircular step hole 42 of the lower clamping block 41 covers the lower half of the annular solder sheet 5; at the same time, the large hole of the semicircular step hole 42 in the upper clamping block 45 covers the upper half of the spacer 4, and at the same time, the small hole of the semicircular step hole 42 of the upper clamping block 45 covers the upper half of the annular solder sheet 5, so the annular solder sheet 5 is heated in the closed annular cavity surrounded by the spacer 4, the shoulder surface 3, the upper clamping block 45 and the lower clamping block 41. It can be seen that the present welding device is superior to the above-mentioned Fig. 9 The welding method shown effectively avoids the outer edge material of the annular solder sheet 5 from falling off when the annular solder sheet 5 is heated, ensures that the spacer 4 can be fully welded to the straight pipe 2, and further ensures that the spacer 4 can be firmly welded to the straight pipe 2 of the packer body, thereby greatly improving the welding quality.

Claims

1. A method for welding a spacer sleeve on a packer body, the method using a device for welding the spacer sleeve on the packer body, the device comprising a workbench (7), the workbench (7) being provided with a clamping mechanism (8) for fixing the packer body with a tool, and a feeding mechanism (9) for positioning and rotating two spacers (4); The feeding mechanism (9) is located on the right side of the clamping mechanism (8), and comprises a base fixedly mounted on the workbench (7), and a conveying cylinder (10) fixedly mounted on the right end surface of the base, wherein the piston rod of the conveying cylinder (10) passes through the base to the left, and a driving motor (11) is fixedly mounted on the extended end, a rotating plate (12) is mounted on the output shaft of the driving motor (11), and positioning components (13) for positioning the spacer (4) and the annular solder sheet (5) are arranged on the upper and lower sides of the rotating plate (12); The positioning assembly (13) located at the lower side of the rotating plate (12) comprises a guide cylinder (14) fixedly mounted on the left end surface of the rotating plate (12), a disc (15) slidably mounted in the guide cylinder (14), a positioning column (16) fixedly mounted on the left end surface of the disc (15) and extending to the left outside the guide cylinder (14), a rod (17) fixedly mounted on the right end surface of the disc (15) and penetrating the rotating plate (12) to the right, a first roller (18) rotatably mounted on the right end of the rod (17), a connecting plate (19) welded to the rod (17), a first spring (20) fixedly mounted on the connecting plate (19) and sleeved on the rod (17), and another end of the first spring (20) One end is fixedly arranged on the right end surface of the rotating plate (12), and under the elastic force of the first spring (20), the disc (15) abuts against the rotating plate (12); a push rod (21) located directly below the rod (17) is slidably penetrated in the lower end of the connecting plate (19), the left end of the push rod (21) penetrates the rotating plate (12) to the left and extends into the disc (15), a second roller (22) is rotatably mounted on the right end of the push rod (21), a fixing plate (23) is welded to the push rod (21), a second spring (24) sleeved on the push rod (21) is fixedly arranged on the fixing plate (23), and the other end of the second spring (24) is fixedly arranged on the connecting plate (19); The workbench (7) is also provided with a side push mechanism (25) located directly below the feeding mechanism (9), the side push mechanism (25) comprising a lifting cylinder (26) fixedly arranged on the bottom surface of the workbench (7), a piston rod of the lifting cylinder (26) passing through the workbench (7) upwards, and a lifting plate fixedly arranged on the extended end, and a second wedge block (27) and a first wedge block (28) fixedly arranged on the top surface of the lifting plate; The workbench (7) is provided with a lower wrapping and welding mechanism (31) for wrapping the lower edge of the annular solder sheet (5), and the base is provided with an upper wrapping and welding mechanism (32) for wrapping the upper edge of the annular solder sheet (5), characterized in that: The method comprises the following steps: S1. Clamping and fixing of the packer body. The specific operation steps are as follows: S11. The worker takes out a packer body, inserts the pipe body (1) of the packer body into the frame (34) of the clamping mechanism (8), and supports the middle part of the bottom surface of the pipe body (1) in the V-shaped groove of the lower V-shaped seat (35); S12, the piston rod of the clamping cylinder (36) of the control clamping mechanism (8) is extended downward, the piston rod drives the upper V-shaped seat (37) to move downward, and the V-shaped groove of the upper V-shaped seat (37) moves toward the top surface of the tube body (1) of the packer body. When the piston rod of the clamping cylinder (36) is fully extended, the tube body (1) of the packer body is just clamped between the upper V-shaped seat (37) and the lower V-shaped seat (35), thereby achieving clamping and fixing of the packer body; S2. Positioning a spacer sleeve (4) and an annular solder sheet (5) in each of the two positioning components (13) of the feeding mechanism (9). The specific operation steps are as follows: S21, the worker takes out a spacer (4) and an annular solder sheet (5), and puts the spacer (4) on the positioning column (16) of the lower positioning component (13) from left to right, and ensures that it rests on the disc (15), and then puts the annular solder sheet (5) on the positioning column (16), and ensures that the annular solder sheet (5) rests on the spacer (4), thereby achieving the positioning of the spacer (4) and the annular solder sheet (5) in the lower positioning component (13). At this time, the annular solder sheet (5) and the spacer (4) in the lower positioning component (13) are both facing the first straight pipe (2) on the packer body; S22, the worker repeats the operation of step S21 once, so as to position a spacer sleeve (4) and an annular solder sheet (5) in the upper positioning assembly (13), and finally positions a spacer sleeve (4) and an annular solder sheet (5) in both positioning assemblies (13) of the feeding mechanism (9); S3. Weld a spacer sleeve (4) onto the first straight pipe (2) of the packer body. The specific operation steps are as follows: S31, the piston rod of the conveying cylinder (10) of the control feeding mechanism (9) is extended to the left, and the piston rod drives the driving motor (11), the rotating plate (12) and the two positioning components (13) to move synchronously to the left, thereby driving the annular solder sheet (5) and the spacer (4) in the positioning component (13) to move synchronously to the left. When the piston rod of the conveying cylinder (10) is fully extended, the positioning column (16) of the positioning component (13) on the lower side is just close to the first straight pipe (2) of the packer body, and at the same time, the first roller (18) is just located above the first wedge surface (29) of the first wedge block (28); S32, controlling the piston rod of the lifting cylinder (26) of the side thrust mechanism (25) to extend upward, the piston rod drives the lifting plate to move upward, the lifting plate drives the first wedge block (28) and the second wedge block (27) to move upward synchronously, and the first wedge surface (29) of the first wedge block (28) first contacts the first roller (18) on the rod (17); As the first wedge block (28) and the second wedge block (27) continue to move upward, the first wedge block (28) pushes the first roller (18) to move leftward, the first roller (18) drives the rod (17) to move leftward, the rod (17) drives the connecting plate (19) and the disk (15) to move leftward synchronously, wherein the connecting plate (19) compresses the first spring (20), and the connecting plate (19) also drives the second spring (24), the fixing plate (23) and the push rod (21) to move leftward synchronously. , and the disc (15) drives the positioning column (16), the annular solder sheet (5) mounted on the positioning column (16), and the spacer (4) to move to the left at the same time; when the first roller (18) separates from the first wedge surface (29) and contacts the left end surface of the first wedge block (28), the left end surface of the positioning column (16) just contacts the right end surface of the first straight pipe (2) of the packer body, and at this time, the second roller (22) just contacts the second wedge surface (30) of the second wedge block (27); As the first wedge block (28) and the second wedge block (27) continue to move upward, the second wedge block (27) pushes the second roller (22) to move leftward, and the second roller (22) drives the push rod (21) to move leftward. The left end of the push rod (21) pushes the spacer sleeve (4) and the annular solder sheet (5) on the positioning column (16) to the left, and the spacer sleeve (4) and the annular solder sheet (5) both move toward the straight tube (2). At the same time, the push rod (21) also drives the fixing plate ( 23) moves synchronously to the left, and the fixed plate (23) gradually compresses the second spring (24) relative to the stationary connecting plate (19); when the second roller (22) separates from the second wedge surface (30) and contacts the left end surface of the second wedge block (27), the annular solder sheet (5) and the spacer (4) are just fixed between the shoulder surface (3) of the packer body and the push rod (21), and the shoulder surface (3), the annular solder sheet (5) and the spacer (4) are in contact; S33, controlling the piston rod of the first lifting cylinder (38) of the lower wrapping and welding mechanism (31) to extend upward, the piston rod drives the lower heating block (39) to move upward, the lower heating block (39) drives the lower clamping block (41) and the heating rod (40) located in the lower heating block (39) to move upward synchronously, when the piston rod of the first lifting cylinder (38) is fully extended, the large hole of the semicircular step hole (42) of the lower clamping block (41) covers the lower half of the spacer (4), and at the same time, the small hole of the semicircular step hole (42) of the lower clamping block (41) covers the lower half of the annular solder sheet (5); S34, the piston rod of the second lifting cylinder (43) controlling the upper wrapping and welding mechanism (32) extends downward, the piston rod drives the upper heating block (44) to move downward, the upper heating block (44) drives the upper clamping block (45) and the heating rod (40) located in the upper heating block (44) to move downward synchronously, when the piston rod of the second lifting cylinder (43) is fully extended, the large hole of the semicircular step hole (42) in the upper clamping block (45) covers the upper half of the spacer (4), and at the same time, the small hole of the semicircular step hole (42) of the upper clamping block (45) covers the upper half of the annular solder sheet (5); S35, connecting the joints of each heating rod (40) in the lower heating block (39) to a power source, and when the heating rod (40) is powered on, heat is generated on the heating rod (40), and the heat is sequentially transferred through the lower heating block (39) and the lower clamping block (41) to the annular solder sheet (5); connecting the joints of each heating rod (40) in the upper heating block (44) to a power source, and when the heating rod (40) is powered on, heat is generated on the heating rod (40), and the heat is sequentially transferred through the upper heating block (44) and the upper clamping block (45) to the annular solder sheet (5); after the annular solder sheet (5) is heated for a period of time, the annular solder sheet (5) welds the spacer (4) to the pipe body (1) of the packer body, thereby finally achieving the welding of a spacer (4) to the first straight pipe (2) of the packer body; S36, after a spacer sleeve (4) is welded to the first straight pipe (2) of the packer body, the piston rod of the first lifting cylinder (38) of the lower wrapping and welding mechanism (31) is controlled to retract downward, so that the lower heating block (39) and the lower clamping block (41) are reset; at the same time, the piston rod of the second lifting cylinder (43) of the upper wrapping and welding mechanism (32) is controlled to retract upward, so that the upper heating block (44) and the upper clamping block (45) are reset; Then, the piston rod of the lifting cylinder (26) of the side thrust mechanism (25) is controlled to retract downward, and the piston rod drives the lifting plate to move downward, and the lifting plate drives the first wedge block (28) and the second wedge block (27) to move downward synchronously. When the first wedge block (28) and the second wedge block (27) are moving downward, under the elastic restoring force of the first spring (20), the first spring (20) drives the rod (17), the first roller (18) and the disc (15) to reset, and the disc (15) re-enters the guide cylinder (14). At the same time, under the elastic restoring force of the second spring (24), the second spring (24) drives the push rod (21) and the second roller (22) to reset; Then, the piston rod of the conveying oil cylinder (10) of the feeding mechanism (9) is controlled to retract to the right, and the piston rod drives the driving motor (11) and the rotating plate (12) to move synchronously to the right, and the rotating plate (12) drives the two positioning components (13) thereon to move synchronously to the right; S4, control the stepper motor (33) of the clamping mechanism (8) to start, the stepper motor (33) drives the frame (34) to rotate, the frame (34) drives the packer body clamped therein to rotate synchronously, when the packer body rotates horizontally by 180°, the controller controls the stepper motor (33) to turn off, at this time, the second straight pipe (2) on the packer body faces right; then, control the drive motor (11) of the feeding mechanism (9) to start, the drive motor (11) drives the rotating plate (12) to rotate, the rotating plate (12) drives the two positioning components (13) thereon to rotate synchronously, when the upper positioning component (13) rotates vertically by 180°, the controller controls the drive motor (11) to turn off, at this time, the annular solder sheet (5) and the spacer (4) in the positioning component (13) both face the second straight pipe (2) on the packer body; S5, the worker repeats the operation of step S3 once, and a spacer sleeve (4) is welded on the second straight pipe (2) of the packer body, thereby finally achieving welding of two spacers (4) on the packer body, and thus obtaining the desired product; S6. Removal of the product: The worker controls the piston rod of the clamping cylinder (36) of the clamping mechanism (8) to retract upward, and the piston rod drives the upper V-shaped seat (37) to move upward. When the upper V-shaped seat (37) is separated from the tube body (1) of the product, the worker takes the product away; S7. The worker repeats the operations of steps S1 to S6 for multiple times, and can continuously weld two spacers (4) on multiple packer bodies, thereby obtaining multiple required products.

2. A welding method for welding a spacer sleeve on a packer body according to claim 1, characterized in that: The clamping mechanism (8) comprises a stepper motor (33) fixedly mounted on the top surface of the workbench (7), and a frame (34) fixedly mounted on the output shaft of the stepper motor (33); a lower V-shaped seat (35) is fixedly mounted on the bottom wall of the frame (34); a clamping cylinder (36) is fixedly mounted on the top wall of the frame (34); a piston rod of the clamping cylinder (36) penetrates downward through the top wall of the frame (34) and extends into the frame (34); and an upper V-shaped seat (37) is fixedly mounted on the extended end of the piston rod of the clamping cylinder (36).

3. A welding method for welding a spacer sleeve on a packer body according to claim 2, characterized in that: The two positioning components (13) of the feeding mechanism (9) are arranged symmetrically up and down.

4. A welding method for welding a spacer sleeve on a packer body according to claim 3, characterized in that: A connecting frame is fixedly arranged on the piston rod of the delivery oil cylinder (10), and the driving motor (11) is fixedly arranged on the top surface of the connecting frame.

5. A method for welding a spacer sleeve on a packer body according to claim 4, characterized in that: The first wedge surface (29) of the first wedge block (28) is parallel to the second wedge surface (30) of the second wedge block (27).

6. A welding method for welding a spacer sleeve on a packer body according to claim 5, characterized in that: The lower wrapping and welding mechanism (31) comprises a first lifting cylinder (38) fixedly mounted on the bottom surface of the workbench (7); a piston rod of the first lifting cylinder (38) passes through the workbench (7) upward, and a lower heating block (39) is fixedly mounted on the extended end; a plurality of heating rods (40) are fixedly mounted in the lower heating block (39); a lower clamping block (41) is fixedly mounted on the top surface of the lower heating block (39); and a semicircular step hole (42) is formed on the top surface of the lower clamping block (41).

7. A method for welding a spacer sleeve on a packer body according to claim 6, characterized in that: The upper wrapping and welding mechanism (32) comprises a horizontal plate fixedly mounted on the top of the base and extending to the left, and a second lifting cylinder (43) fixedly mounted on the extended end of the horizontal plate. The piston rod of the second lifting cylinder (43) passes through the horizontal plate downward, and an upper heating block (44) is fixedly mounted on the extended end. A plurality of heating rods (40) are fixedly mounted in the upper heating block (44). An upper clamping block (45) is fixedly mounted on the bottom surface of the upper heating block (44), and a semicircular step hole (42) is provided on the bottom surface of the upper clamping block (45).

8. A method for welding a spacer sleeve on a packer body according to claim 7, characterized in that: The large hole of the semicircular step hole (42) is directly equal to the outer diameter of the spacer (4), and the small hole of the semicircular step hole (42) is equal to the outer diameter of the pipe body (1) of the packer body.

9. A method for welding a spacer sleeve on a packer body according to claim 8, characterized in that: The device also includes a controller, which is electrically connected to the conveying cylinder (10), the pressing cylinder (36), the lifting cylinder (26), the first lifting cylinder (38), the second lifting cylinder (43), the driving motor (11) and the stepping motor (33) via signal lines.

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