Floating pressure resistance welding device

Abstract

The present application belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a floating pressure resistance welding device. The device comprises an X-shaped welding gun body, a hydraulic plunger cylinder element, a composite water-cooled electrode arm, a disc spring electrode arm reset mechanism and a pressure sensor mechanism. The composite water-cooled electrode arm is arranged at the front end of the X-shaped welding gun body. The hydraulic plunger cylinder element, the disc spring electrode arm reset mechanism and the pressure sensor mechanism are arranged on the X-shaped welding gun body. The hydraulic plunger cylinder element is used to drive the composite water-cooled electrode arm to clamp. The disc spring electrode arm reset mechanism is used to drive the composite water-cooled electrode arm to open. The pressure sensor mechanism is arranged opposite to the hydraulic plunger cylinder element. The pressure sensor mechanism detects the electrode contact pressure of the composite water-cooled electrode arm by outputting the pressure size through the hydraulic plunger cylinder element. The present application has stable and reliable structure, is convenient to use, has strong compatibility, and can realize the pressure resistance welding function of nuclear element skeletons with various structures and specifications.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a floating pressure resistance welding device. BACKGROUND

[0002] The framework is the core structure of the nuclear element, and is assembled and fixed in the framework structure according to certain rules by a carrier of a plurality of fuel rods, control rods and other small elements to form the nuclear element. The nuclear element is long-term operated in a high-temperature, high-pressure and high-heat environment in the nuclear reactor, and at the same time, bears a large thermal stress, gravity, nuclear material radiation and the like. In order to ensure long-term safe and stable operation of the nuclear reactor, very strict manufacturing process standards and quality inspection and detection standards are put forward for the nuclear element. The framework is composed of a plurality of grids and a plurality of guide pipes, and the contact surface of the grid and the guide pipe is formed by a pressure resistance welding method to form a welding point, so as to realize firm connection between the grid and the guide pipe. The welding quality of the framework product has a direct influence on the quality of the nuclear element and the long-term safe and stable operation of the nuclear reactor.

[0003] The conventional manual operation welding gun of the framework pressure resistance welding has two basic forms: 1) a manual welding gun structure in which an inner gun body and an outer gun body are coaxially telescopic to realize electrode contact point opening and clamping movement, so as to realize pressure resistance welding of the grid and the guide pipe; this form of welding gun cannot meet the product welding requirements in some framework products with dense tube bundle arrangement and large welding point clamping force, and has problems of welding operation difficulty and unstable welding point quality;

[0004] 2) a simple X-type electrode arm manual welding gun; the X-type electrode arm manual welding gun is suitable for welding of some framework products with dense tube bundle arrangement, but the traditional simple structure X-type manual pressure resistance welding gun has problems of difficult electrode pressure reaching more than 1000 Newton, complex water cooling structure of the electrode arm, and the like, which limits the application of the welding gun in manual welding operation in the occasion requiring large electrode pressure and large welding current. SUMMARY

[0005] In view of the above problems, the present application aims to provide a floating pressure resistance welding device, which is stable and reliable, convenient to use, and has strong compatibility, and can realize pressure resistance welding function of framework of nuclear elements with various structures and specifications.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The application discloses a floating pressure resistance welding device, which comprises an X-shaped welding gun body, a hydraulic plunger cylinder element, a composite water-cooled electrode arm, a disc spring electrode arm reset mechanism and a pressure sensor mechanism, wherein the composite water-cooled electrode arm is arranged at the front end of the X-shaped welding gun body; the hydraulic plunger cylinder element, the disc spring electrode arm reset mechanism and the pressure sensor mechanism are all arranged on the X-shaped welding gun body, the hydraulic plunger cylinder element is used as a power source for clamping action of the composite water-cooled electrode arm; the disc spring electrode arm reset mechanism is used as a power source for opening action of the composite water-cooled electrode arm; the pressure sensor mechanism is arranged opposite to the hydraulic plunger cylinder element, and the pressure sensor mechanism detects the output pressure of the hydraulic plunger cylinder element, and then detects the electrode contact pressure of the composite water-cooled electrode arm.

[0008] The X-shaped welding gun body comprises a lower shell and an upper shell, wherein the upper shell is provided with an upper shell connecting ear plate, and the lower shell is hinged to the upper shell connecting ear plate through a hinge shaft.

[0009] The lower shell and the upper shell are both made of aluminum alloy material; and an insulating sleeve a is sleeved on the hinge shaft.

[0010] The composite water-cooled electrode arm comprises two composite water-cooled electrode arm bodies arranged at the front ends of the lower shell and the upper shell respectively.

[0011] The composite water-cooled electrode arm body comprises a copper electrode arm and stainless steel electrode arms arranged on both sides of the copper electrode arm, wherein the copper electrode arm is provided with a water circulation channel, and one side of the stainless steel electrode arm is provided with a water inlet hole and a water outlet hole which are in communication with both ends of the water circulation channel.

[0012] The lower shell is provided with an oil passage, one side of the lower shell corresponding to the upper shell is provided with a hydraulic plunger cylinder mounting hole, the hydraulic plunger cylinder mounting hole is communicated with the oil passage, and the hydraulic plunger cylinder element is arranged in the hydraulic plunger cylinder mounting hole.

[0013] The hydraulic plunger cylinder element comprises a hydraulic cylinder threaded sleeve and a plunger, the hydraulic cylinder threaded sleeve is threadedly connected with the hydraulic plunger cylinder mounting hole on the lower shell, and the end face of the hydraulic cylinder threaded sleeve is sealed with the lower shell through an end face O-shaped sealing ring; the plunger is inserted into the hydraulic cylinder threaded sleeve and is in sliding fit, and the plunger and the hydraulic cylinder threaded sleeve are sealed through a plunger O-shaped sealing ring.

[0014] The disc spring electrode arm reset mechanism comprises a lower hinged screw sleeve, a disc spring mounting sleeve, a pull rod, an upper hinged seat insulating sleeve, an upper hinged seat and a disc spring, wherein the lower hinged screw sleeve is hinged to the lower shell through a pin shaft; the upper hinged seat is hinged to the upper shell through a protruding shaft, and the protruding shaft is sleeved with a hinged seat insulating sleeve; the disc spring mounting sleeve is threadedly connected with the lower hinged screw sleeve; the pull rod passes through the lower hinged screw sleeve, the disc spring mounting sleeve and the upper hinged seat in sequence; the lower end of the pull rod is locked through a nut, and the upper end of the pull rod is locked through an adjusting nut b; the disc spring is sleeved on the pull rod and accommodated in the disc spring mounting sleeve; the upper end of the disc spring abuts against the inner stopper of the disc spring mounting sleeve, and the lower end abuts against the shaft shoulder of the pull rod.

[0015] The upper shell is provided with a stepped hole;

[0016] The pressure sensor mechanism comprises a jackscrew, a threaded sleeve, a circular plate and a pressure sensor, wherein the threaded sleeve, the circular plate and the pressure sensor are arranged from inside to outside in the stepped hole of the upper shell, and the threaded sleeve is threadedly connected with the upper shell; the circular plate and the pressure sensor are connected with the upper shell through a plurality of screws; the jackscrew is threadedly connected with the threaded sleeve, and the end of the jackscrew abuts against the circular plate.

[0017] The floating pressure resistance welding device further comprises a pre-clamping mechanism; the pre-clamping mechanism comprises a trigger, a hinged threaded seat, a disc spring, an upper shell hinged seat, an adjusting nut a and a screw rod, wherein the trigger is hinged to the lower shell, and the upper end of the trigger is hinged to the hinged threaded seat through a hinged pin shaft; the upper shell hinged seat is hinged to the upper shell through an upper shell hinged shaft, and the upper shell hinged shaft is sleeved with an insulating sleeve b; the adjusting nut a is threadedly connected with the upper shell hinged seat; the screw rod passes through the through holes of the adjusting nut a and the upper shell hinged seat in sequence, and the lower end is threadedly connected with the hinged threaded seat; the disc spring is sleeved on the screw rod, and the two ends of the disc spring abut against the upper shell hinged seat and the hinged threaded seat, respectively.

[0018] The floating pressure resistance welding device further comprises a rotary hanger mechanism; the rotary hanger mechanism comprises a roller assembly, an annular track and a hanger, wherein opposite sides of the annular track are provided with hanger connecting seats, the two ends of the hanger are connected with the hanger connecting seats on the opposite sides of the annular track, respectively, the annular track is provided with two groups of roller assemblies, and the two groups of roller assemblies are connected with the two sides of the lower shell.

[0019] The advantages and beneficial effects of the present application are as follows:

[0020] The floating pressure resistance welding device of the application adopts hydraulic elements to replace traditional pneumatic elements as the power source of the electrode arm clamping action of the welding gun, fundamentally ensures that the welding gun structure is compact, the overall size is greatly reduced compared with the traditional manual resistance welding gun, greatly improves the flexibility and convenience of the welding gun operation in the welding operation, and promotes the realization of the miniaturization and lightweight design of the welding gun; the overall weight of the welding gun can be controlled at about fifteen kilograms, and is connected to the suspended spring balancer through the rotary hanger and the steel wire rope, and by adjusting the friction resistance of the spring balancer, the spring balancer and the gravity of the welding gun can be in a completely balanced state, so that the welding gun can hover at any position in the air, and the operator can easily change the position and posture of the welding gun by holding the welding gun;

[0021] The floating pressure resistance welding device of the application adopts composite materials to manufacture the electrode arm, which has three advantages compared with the electrode arm made of traditional copper alloy materials: 1. Under the same electrode contact clamping force index conditions, the structure size of the electrode arm made of composite materials is smaller, which is suitable for manual welding of the skeleton with more densely arranged guide pipes; 2. Under the same structure size conditions, the electrode arm made of composite materials has greater bending and torsional resistance than the traditional copper alloy electrode arm, which is suitable for welding operation under large electrode clamping force working conditions; 3. The composite electrode arm is made of copper alloy plates and high-strength steel plates through precise brazing process, and the water cooling channel is designed and processed conveniently, has good water cooling effect, and is suitable for welding operation under long-time and large-current working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the floating pressure resistance welding device of the application;

[0023] Figure 2 It is a structure schematic view of the X-shaped welding gun body in the application;

[0024] Figure 3 It is an A-A sectional view of Figure 2 ;

[0025] Figure 4 It is a structure schematic view of the hydraulic plunger cylinder element in the application;

[0026] Figure 5 It is a B-B sectional view of Figure 4 ;

[0027] Figure 6 It is a structure schematic view of the composite water-cooled electrode arm in the application;

[0028] Figure 7 It is a top view of Figure 6 ;

[0029] Figure 8 It is a side view of Figure 7C-C sectional view of the X-shaped welding torch;

[0030] Figure 9 Structure diagram of the pre-clamping mechanism in the application;

[0031] Figure 10 Structure diagram of the disc spring electrode arm reset mechanism in the application;

[0032] Figure 11 D-D sectional view of the X-shaped welding torch; Figure 10

[0033] Figure 12 Installation diagram of the pressure sensor mechanism in the application;

[0034] Figure 13 E-E sectional view of the X-shaped welding torch; Figure 12

[0035] Figure 14 E-E sectional view of the X-shaped welding torch; Figure 13

[0036] Structure diagram of the rotary hanger mechanism in the application; Figure 15

[0037] In the figure: 1 is the X-shaped welding torch body, 101 is the lower shell, 102 is the upper shell, 103 is the upper shell connecting ear plate, 104 is the fixing pin, 105 is the fastening screw, 106 is the hinged shaft, 107 is the shaft stop ring, 108 is the insulating sleeve a, 2 is the hydraulic plunger cylinder element, 201 is the oil inlet hole, 202 is the hydraulic cylinder threaded sleeve, 203 is the end face O-shaped sealing ring, 204 is the plunger O-shaped sealing ring, 205 is the plunger, 206 is the plug, 3 is the composite water-cooled electrode arm, 301 is the water inlet hole, 302 is the water outlet hole, 303 is the copper electrode arm, 304 is the stainless steel electrode arm, 305 is the water circulation channel, 4 is the pre-clamping mechanism, 401 is the trigger, 402 is the hinged pin shaft, 403 is the hinged threaded seat, 404 is the disc spring, 405 is the upper shell hinged seat, 406 is the insulating sleeve b, 407 is the upper shell hinged shaft, 408 is the adjusting nut a, 409 is the screw rod, 410 is the lower shell hinged hole, 5 is the disc spring electrode arm reset mechanism, 501 is the nut, 502 is the flat washer, 503 is the pin shaft, 504 is the lower hinged screw sleeve, 505 is the disc spring mounting sleeve, 506 is the pull rod, 507 is the upper hinged seat insulating sleeve, 508 is the upper hinged seat, 509 is the adjusting nut b, 510 is the disc spring, 6 is the pressure sensor mechanism, 602 is the screw, 603 is the jackscrew, 604 is the threaded sleeve, 605 is the round plate, 606 is the pressure sensor, 7 is the rotary hanger mechanism, 701 is the roller assembly, 702 is the annular rolling way, 703 is the hanger connecting seat, 704 is the connecting screw, 705 is the hanger. DETAILED DESCRIPTION

[0038] ​​​In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is described in detail below with reference to the drawings and specific embodiments.

[0039] As shown in Figure 1 The present application provides a floating pressure resistance welding device, which comprises an X-shaped welding gun body 1, a hydraulic plunger cylinder element 2, a composite water-cooled electrode arm 3, a disc spring electrode arm reset mechanism 5 and a pressure sensor mechanism 6. The composite water-cooled electrode arm 3 is arranged at the front end of the X-shaped welding gun body 1. The hydraulic plunger cylinder element 2, the disc spring electrode arm reset mechanism 5 and the pressure sensor mechanism 6 are all arranged on the X-shaped welding gun body 1. The hydraulic plunger cylinder element 2 is used as the power source for the clamping action of the composite water-cooled electrode arm 3. The disc spring electrode arm reset mechanism 5 is used as the power source for the opening action of the composite water-cooled electrode arm 3. The pressure sensor mechanism 6 is arranged opposite to the hydraulic plunger cylinder element 2. The pressure sensor mechanism 6 detects the output pressure of the hydraulic plunger cylinder element 2, and then detects the electrode contact pressure of the composite water-cooled electrode arm 3.

[0040] As shown in Figures 2-3 In the embodiment of the present application, the X-shaped welding gun body 1 comprises a lower shell 101 and an upper shell 102. The upper shell 102 is provided with upper shell connecting ear plates 103. The lower shell 101 is hinged to the upper shell connecting ear plates 103 through a hinge shaft 106.

[0041] Specifically, the lower shell 101 and the upper shell 102 are both made of aluminum alloy. Two upper shell connecting ear plates 103 are arranged on the two sides of the upper shell 102. The upper shell connecting ear plates 103 are fixedly connected to the upper shell 102 through fixing pins 104 and fastening screws 105. The two upper shell connecting ear plates 103 are connected to the hinge holes on the lower shell 101 through the hinge shaft 106. The hinge shaft 106 is axially limited by a shaft check ring 107 to prevent axial movement. An insulating sleeve a 108 is sleeved on the hinge shaft 106 to realize the electrical insulation function between the upper shell and the lower shell.

[0042] As shown in Figures 6-8 In the embodiment of the present application, the composite water-cooled electrode arm 3 comprises two composite water-cooled electrode arm bodies arranged at the front ends of the lower shell 101 and the upper shell 102, respectively. The composite water-cooled electrode arm body comprises a copper electrode arm 303 and stainless steel electrode arms 304 arranged on both sides of the copper electrode arm 303. The copper electrode arm 303 is provided with a water circulation channel 305. One of the stainless steel electrode arms 304 is provided with a water inlet hole 301 and a water outlet hole 302 which are in communication with both ends of the water circulation channel 305.

[0043] In the embodiment of the present application, the copper electrode arm 303 is provided with a U-shaped water circulation channel 305, and the contact surfaces of the two stainless steel electrode arms 304 and the copper electrode arm 303 are welded by brazing process, so that the water circulation channel 305 forms a closed cooling water channel.

[0044] Specifically, the rear end of the composite water-cooled electrode arm body is a cuboid structure with a square cross section of 30mmX30mm, which is directly installed into the 30mmX30mm cross section installation groove of the front end of the aluminum alloy upper and lower shells of the X-shaped gun body body 1, and is fastened and fixed by a copper pressing plate, a screw, a positioning screw and the like. The two composite water-cooled electrode arm bodies are respectively connected and fastened with the copper electrode plate at the rear end of the manual welding gun through flat soft copper cables. The water inlet hole 301 and the water outlet hole 302 are connected with the cooling water pipe through the water-cooled pipe joint.

[0045] As shown in the drawings, Figure 4 In the embodiment of the present application, an oil passage is arranged in the lower shell 101, and the side of the lower shell 101 corresponding to the upper shell 102 is provided with a hydraulic plunger cylinder installation hole which is communicated with the oil passage; the hydraulic plunger cylinder element 2 is arranged in the hydraulic plunger cylinder installation hole. The rear end of the lower shell 101 is provided with an oil inlet hole 201, and the oil inlet hole 201 is provided with a hydraulic pipe joint which is connected with a hydraulic oil pipe. The lower shell 101 is provided with a drain hole which is communicated with the oil passage, and the drain hole is blocked by the plug 206.

[0046] As shown in the drawings, Figure 5 In the embodiment of the present application, the hydraulic plunger cylinder element 2 comprises a hydraulic cylinder threaded sleeve 202 and a plunger 205. The hydraulic cylinder threaded sleeve 202 is threadedly connected with the hydraulic plunger cylinder installation hole on the lower shell 101, and the end face of the hydraulic cylinder threaded sleeve 202 is sealed with the lower shell 101 through the end face O-shaped sealing ring 203 which is arranged in the sealing groove of the lower shell 101, so as to realize the static sealing of the hydraulic oil. The plunger 205 is inserted into the hydraulic cylinder threaded sleeve 202 and is in sliding fit, and the plunger 205 is sealed with the hydraulic cylinder threaded sleeve 202 through the plunger O-shaped sealing ring 204. The plunger O-shaped sealing ring 204 is arranged in the inner hole sealing groove of the hydraulic cylinder threaded sleeve 202, so as to form the dynamic sealing of the plunger. When the hydraulic plunger cylinder element 2 is filled with oil, the plunger 205 is extended, so as to realize the clamping function of the composite water-cooled electrode arm 3. When the hydraulic oil is unloaded, the plunger 205 is retracted under the action of external force.

[0047] The composite water-cooled electrode arm 3 is closed under the action of the hydraulic plunger cylinder element 2, and at this time, the disc spring electrode arm reset mechanism 5 is in the compressed state, and the tensile force is generated at the rear end of the X-shaped gun body body 1. When the hydraulic cylinder is unloaded, the X-shaped gun body body 1 realizes the opening action of the composite water-cooled electrode arm 3 under the action of the tensile force at the rear end.

[0048] As shown in the drawings, Figures 10-11As shown, in the embodiment of the present invention, the disc spring electrode arm reset mechanism 5 includes a lower hinge nut 504, a disc spring mounting sleeve 505, a pull rod 506, an upper hinge seat insulating sleeve 507, an upper hinge seat 508 and a disc spring 510, wherein the lower hinge nut 504 is hinged to the lower shell 101 through a pin shaft 503; the upper hinge seat 508 is hinged to the upper shell 102 through an extension shaft, and the extension shaft is provided with an hinge seat insulating sleeve 507; the disc spring mounting sleeve 505 is screwed to the lower hinge nut 504 The pull rod 506 passes through the lower hinge nut 504, the disc spring mounting sleeve 505 and the upper hinge seat 508 in sequence. The lower end of the pull rod 506 is locked by the nut 501, and the upper end of the pull rod 506 is locked by the adjusting nut b509; a plurality of pairs of disc springs 510 assembled in pairs are sleeved on the pull rod 506, and the disc springs 510 are accommodated in the disc spring mounting sleeve 505, the upper end of the disc spring 510 abuts against the inner stop of the disc spring mounting sleeve 505, and the lower end abuts against the shaft shoulder of the pull rod 506. In this way, the disc spring electrode arm reset mechanism 5 is connected to the hinge holes of the upper and lower shells through the upper and lower pins. The composite water-cooled electrode arm 3 is closed under the action of the clamping force, and at the same time, the pull rod 506 of the disc spring electrode arm reset mechanism 5 is stretched, and the pull rod 506 compresses the disc spring 510; when the clamping force of the composite water-cooled electrode arm 3 stops, the elastic force of the disc spring 510 pulls the composite water-cooled electrode arm 3 to open and reset, and the adjusting nut b509 can adjust the spring force and the opening angle of the electrode arm.

[0049] like Figures 12-14 As shown, in an embodiment of the present invention, a stepped hole is provided on the upper shell 102; the pressure sensor mechanism 6 includes a top screw 603, a threaded sleeve 604, a circular plate 605 and a pressure sensor 606, wherein the threaded sleeve 604, the circular plate 605 and the pressure sensor 606 are arranged in the stepped hole of the upper shell 102 from the inside to the outside, and the threaded sleeve 604 is threadedly connected to the upper shell 102; the circular plate 605 and the pressure sensor 606 are connected to the upper shell 102 by multiple screws 602; the top screw 603 is threadedly connected to the threaded sleeve 604, and the end of the top screw 603 abuts against the circular plate 605.

[0050] Specifically, the screw 602 passes through the screw hole of the upper shell 102 and the through hole of the circular plate 605 in sequence and is connected and fastened with the threaded hole of the pressure sensor 606. In this way, by adjusting the top screw 603 and the screw 602, the position of the pressure sensor 606 relative to the upper shell 102 along the axial direction can be adjusted to realize the electrode arm opening size adjustment function.

[0051] like Figure 1 As shown, based on the above embodiment, a floating pressure resistance welding device provided by the present invention also includes a pre-clamping mechanism 4. The pre-clamping mechanism 4 is a mechanism for manually controlling the closing action of the electrode arm. The operation is convenient and flexible, and it is particularly helpful to observe whether the welding point position is correct during manual welding operations.

[0052] As Figure 9 shown in the embodiment of the present application, the pre-clamping mechanism 4 comprises a trigger 401, a hinged threaded seat 403, a disc spring 404, an upper housing hinged seat 405, an adjusting nut a 408 and a screw rod 409. The trigger 401 is provided with two hinged holes, the lower hinged hole is hinged with the lower housing 101 through a hinged hole, and the upper hinged hole of the trigger 401 is hinged with the hinged threaded seat 403 through a hinged pin shaft 402. The upper housing hinged seat 405 is hinged with the upper housing 102 through an upper housing hinged shaft 407, and an insulating sleeve b 406 is sleeved on the upper housing hinged shaft 407. The adjusting nut a 408 is threadedly connected with the upper housing hinged seat 405. The screw rod 409 passes through the through holes of the adjusting nut a 408 and the upper housing hinged seat 405 in sequence, and the lower end is threadedly connected with the hinged threaded seat 403. A plurality of pairs of disc springs 404 are sleeved on the screw rod 409, and the two ends of the disc springs 404 are respectively abutted with the upper housing hinged seat 405 and the hinged threaded seat 403. In this way, the upper and lower pin shafts of the pre-clamping mechanism 4 are hinged with the upper and lower housings respectively. During the welding operation, the trigger 401 is pressed down, and the pre-clamping mechanism 4 will make the composite water-cooled electrode arm 3 produce a clamping action. The clamping force of the composite water-cooled electrode arm 3 can be adjusted by the adjusting nut a 408.

[0053] As Figure 1 shown, on the basis of the above embodiment, the floating pressure resistance welding device provided by the present application further comprises a rotary hanger mechanism 7. The X-shaped gun body 1 is connected to the spring balancer through the rotary hanger mechanism 7 and the steel wire rope, so that the weight of the manual welding gun device can be completely balanced. At the same time, the rotary hanger mechanism 7 is very convenient to realize the change operation of the position and posture of the manual welding gun device, such as lifting, turning over and rotating.

[0054] As Figure 15 shown in the embodiment of the present application, the rotary hanger mechanism 7 comprises a roller assembly 701, an annular raceway 702 and a hanger 705. Opposite sides of the annular raceway 702 are provided with hanger connecting seats 703, two ends of the hanger 705 are connected with the hanger connecting seats 703 on the opposite sides of the annular raceway 702, and the annular raceway 702 is provided with two groups of roller assemblies 701, which are connected with the two sides of the lower housing 101.

[0055] Specifically, the screw hole of the roller assembly 701 is connected and fastened with the screw hole of the lower shell 101, the annular raceway 702 is connected and fastened with the hanger connecting seat 703 through the screw, and the screw hole of the hanger 705 is connected and fastened with the hanger connecting seat 703 through the connecting screw 704. The four rollers of the roller assembly 701 can roll along the annular raceway 702, and the upper end hole of the hanger 705 is connected with the soft steel wire rope of the spring balancer, so that the gravity of the manual welding gun can be balanced, and the position of the welding gun in the air can be adjusted and the welding gun can be turned over.

[0056] The operating flow of the floating pressure resistance welding device is as follows: connecting welding cables, oil pipes, pressure sensor signal lines, micro switch cables and the like according to the design specifications of the mechanical, electrical and hydraulic interfaces; adjusting the opening distance of the front end of the composite water-cooled electrode arm 3 according to the size of the skeleton; adjusting the friction resistance of the spring balancer to ensure that the gravity of the welding gun and the friction resistance of the spring balancer are in a two-force balance state; operating the welding gun to make the electrode contact point at the end of the composite water-cooled electrode arm 3 reach the welding point position; pressing the trigger 401 in the pre-clamping mechanism 4 to the middle position to clamp the electrode contact point; after observing that the welding point position meets the requirements, further pressing the trigger 401 to trigger the micro switch; the hydraulic plunger cylinder element 2 acts, the clamping force of the electrode contact point reaches the set value and the pressure value is fed back through the pressure sensor 606; the welding controller starts to output the welding current and voltage to complete the resistance welding process; after the welding is completed, the hydraulic plunger cylinder element 2 is automatically unloaded, the composite water-cooled electrode arm 3 is opened under the action of the disc spring electrode arm reset mechanism 5, and one welding operation is completed.

[0057] The hydraulic element is adopted as the power source of the welding gun clamping force, so that the structure size of the power element is greatly reduced, and powerful guarantee is provided for realizing the miniaturization, compactness and light weight design of the manual welding gun.

[0058] The composite water-cooled electrode arm is made of composite material, and the composite water-cooled electrode arm is an electrode arm structure welded by high-strength martensitic stainless steel and high-conductivity copper alloy material through high-precision brazing method. The composite water-cooled electrode arm has the advantages of high strength, high bending and torsional resistance, high conductivity and the like, which effectively solves the problems of electrode arm stress and cooling. Since the high-strength martensitic stainless steel and the copper alloy with good conductivity are used to manufacture the composite electrode arm, the strength and rigidity of the electrode arm are greatly improved under the premise of ensuring large current transmission, so that the deformation amount of the electrode arm is greatly reduced under the same clamping force, and the water cooling channel structure design of the composite electrode arm is improved, and the water cooling effect of the electrode arm is also improved. Compared with the traditional copper alloy electrode arm, the composite water-cooled electrode arm has smaller structure size and smaller deformation amount under large clamping force, and is more suitable for the welding operation of nuclear element skeleton products with dense guide tube arrangement and large clamping force requirement.

[0059] The present application adopts pre-clamping mechanism to realize electrode contact pre-clamping action, and the operator can control the opening and clamping action of the electrode contact through the handle trigger very conveniently, which is convenient for observing and confirming whether the welding point position meets the position requirement, and after confirming the correct welding point position, triggering the control switch, the hydraulic element controls the electrode arm clamping action, realizing the pressure resistance welding operation of the grid and the guide pipe.

[0060] The present application adopts simple and compact plunger cylinder hydraulic element to control the clamping action of the welding gun electrode arm, and the structure size is greatly reduced. The plunger cylinder hydraulic element is single-acting plunger cylinder, which cannot control the opening action of the electrode arm, therefore, the present application designs disc spring electrode arm reset mechanism to control the opening action of the composite water-cooled electrode arm, and by adjusting the position of the adjusting nut of the disc spring structure, the opening size of the electrode arm can be adjusted, which is convenient for the welding operation of the operator.

[0061] In the manual welding gun, high-precision pressure sensor and hydraulic plunger cylinder are arranged in series, the pressure sensor can directly feedback the output pressure of the plunger cylinder, and through the force arm conversion of the electrode arm, the electrode contact pressure value is obtained. At the same time, the pressure sensor, the pressure sensor mounting plate, the electrode arm opening degree adjusting top screw, the fastening screw and the upper shell constitute the electrode arm opening degree adjusting mechanism together, which can adjust the opening degree of the welding gun electrode arm according to the diameter of the to-be-welded guide pipe.

[0062] The above-mentioned is only the embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A floating pressure resistance welding device, characterized by, The X-shaped welding gun body (1), the hydraulic plunger cylinder element (2), the composite water-cooled electrode arm (3), the disc spring electrode arm reset mechanism (5) and the pressure sensor mechanism (6) are provided, wherein the composite water-cooled electrode arm (3) is arranged at the front end of the X-shaped welding gun body (1); the hydraulic plunger cylinder element (2), the disc spring electrode arm reset mechanism (5) and the pressure sensor mechanism (6) are arranged on the X-shaped welding gun body (1), the hydraulic plunger cylinder element (2) is used as the power source for the clamping action of the composite water-cooled electrode arm (3); the disc spring electrode arm reset mechanism (5) is used as the power source for the opening action of the composite water-cooled electrode arm (3); the pressure sensor mechanism (6) is arranged opposite to the hydraulic plunger cylinder element (2), the pressure sensor mechanism (6) detects the output pressure of the hydraulic plunger cylinder element (2), and then detects the electrode contact pressure of the composite water-cooled electrode arm (3). The X-shaped welding gun body (1) comprises a lower shell (101) and an upper shell (102), wherein the upper shell (102) is provided with an upper shell connecting ear plate (103), and the lower shell (101) is hinged to the upper shell connecting ear plate (103) through a hinge shaft (106). An oil passage is arranged in the lower shell (101), and the lower shell (101) is provided with a hydraulic plunger cylinder mounting hole on the side corresponding to the upper shell (102), and the hydraulic plunger cylinder mounting hole is communicated with the oil passage; the hydraulic plunger cylinder element (2) is arranged in the hydraulic plunger cylinder mounting hole.

2. The floating press resistance welding device of claim 1, wherein, The lower shell (101) and the upper shell (102) are made of aluminum alloy material; an insulating sleeve a (108) is sleeved on the hinge shaft (106).

3. The floating press resistance welding device of claim 1, wherein, The composite water-cooled electrode arm (3) comprises two composite water-cooled electrode arm bodies arranged at the front ends of the lower shell (101) and the upper shell (102) respectively. The composite water-cooled electrode arm body comprises a copper electrode arm (303) and stainless steel electrode arms (304) arranged on both sides of the copper electrode arm (303), wherein the copper electrode arm (303) is provided with a water circulation passage (305), and one side of the stainless steel electrode arm (304) is provided with a water inlet hole (301) and a water outlet hole (302) communicated with both ends of the water circulation passage (305).

4. The floating press resistance welding device of claim 1, wherein, The hydraulic plunger cylinder element (2) comprises a hydraulic cylinder threaded sleeve (202) and a plunger (205), the hydraulic cylinder threaded sleeve (202) is threadedly connected with the hydraulic plunger cylinder mounting hole on the lower shell (101), and the end face of the hydraulic cylinder threaded sleeve (202) is sealed with the lower shell (101) through an end face O-shaped sealing ring (203); the plunger (205) is inserted into the hydraulic cylinder threaded sleeve (202) and is in sliding fit, and the plunger (205) and the hydraulic cylinder threaded sleeve (202) are sealed through a plunger O-shaped sealing ring (204).

5. The floating press resistance welding device of claim 1, wherein, The disc spring electrode arm reset mechanism (5) comprises a lower hinged screw sleeve (504), a disc spring mounting sleeve (505), a pull rod (506), an upper hinged seat insulating sleeve (507), an upper hinged seat (508) and a disc spring (510), wherein the lower hinged screw sleeve (504) is hinged with the lower shell (101) through a pin shaft (503); the upper hinged seat (508) is hinged with the upper shell (102) through a protruding shaft, and an insulating sleeve b (406) is sleeved on the protruding shaft; the disc spring mounting sleeve (505) is threadedly connected with the lower hinged screw sleeve (504); the pull rod (506) passes through the lower hinged screw sleeve (504), the disc spring mounting sleeve (505) and the upper hinged seat (508) in sequence; the lower end of the pull rod (506) is locked through a nut (501), and the upper end of the pull rod (506) is locked through an adjusting nut b (509); the disc spring (510) is sleeved on the pull rod (506) and accommodated in the disc spring mounting sleeve (505), the upper end of the disc spring (510) abuts against the inner stopper of the disc spring mounting sleeve (505), and the lower end abuts against the shaft shoulder of the pull rod (506).

6. The floating press resistance welding device of claim 1, wherein, The upper shell (102) is provided with a stepped hole; The pressure sensor mechanism (6) comprises a jackscrew (603), a threaded sleeve (604), a circular plate (605) and a pressure sensor (606), wherein the threaded sleeve (604), the circular plate (605) and the pressure sensor (606) are arranged in the stepped hole of the upper shell (102) from inside to outside, and the threaded sleeve (604) is threadedly connected with the upper shell (102); the circular plate (605) and the pressure sensor (606) are connected with the upper shell (102) through a plurality of screws (602); the jackscrew (603) is threadedly connected with the threaded sleeve (604), and the end of the jackscrew (603) abuts against the circular plate (605).

7. The floating press resistance welding device of claim 1, wherein, The pre-clamping mechanism (4) further comprises a trigger (401), a hinged threaded seat (403), a disc spring (404), an upper shell hinged seat (405), an adjusting nut a (408) and a screw rod (409), wherein the trigger (401) is hinged on the lower shell (101), the upper end of the trigger (401) is hinged with the hinged threaded seat (403) through a hinged pin shaft (402); the upper shell hinged seat (405) is hinged with the upper shell (102) through an upper shell hinged shaft (407), and an insulating sleeve b (406) is sleeved on the upper shell hinged shaft (407); the adjusting nut a (408) is threadedly connected with the upper shell hinged seat (405); the screw rod (409) passes through the through holes of the adjusting nut a (408) and the upper shell hinged seat (405) in sequence, and the lower end is threadedly connected with the hinged threaded seat (403); the disc spring (404) is sleeved on the screw rod (409), and the two ends of the disc spring (404) abut against the upper shell hinged seat (405) and the hinged threaded seat (403) respectively.

8. The floating press resistance welding device of claim 1, wherein, It also includes a rotary hanger mechanism (7); the rotary hanger mechanism (7) includes a roller assembly (701), an annular raceway (702) and a hanger (705), wherein the opposite sides of the annular raceway (702) are provided with hanger connecting seats (703), the two ends of the hanger (705) are connected with the hanger connecting seats (703) on the two sides of the annular raceway (702) respectively, and the annular raceway (702) is provided with two groups of roller assemblies (701), and the two groups of roller assemblies (701) are connected with the two sides of the lower shell (101).

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