CN112658431B

CN112658431B - Vertical copper pipe welding bench

Info

Publication number: CN112658431B
Application number: CN202011465578.6A
Authority: CN
Inventors: 莫君
Original assignee: Hunan Kaiyi Refrigeration Equipment Co ltd
Current assignee: Hunan Kaiyi Refrigeration Equipment Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-09-21
Anticipated expiration: 2040-12-14
Also published as: CN112658431A

Abstract

The invention discloses a vertical copper pipe welding workbench. The vertical copper pipe welding workbench comprises a supporting frame, an upper clamping piece, a lower clamping piece, a welding rod clamp, a heating nozzle and a shaking box, wherein the upper clamping piece is located on the supporting frame and used for clamping an inner copper pipe, the lower clamping piece is located on the supporting frame and used for clamping an outer copper pipe, and the welding rod clamp is used for clamping a welding rod. The clamping center point of the upper clamping piece and the clamping center point of the lower clamping piece are located on the same vertical straight line. The heating nozzle can spray flames and is used for heating the copper pipes and heating the shaking box. The shaking box is used for triggering welding fluid in a welding gap. The vertical copper pipe welding workbench is used for welding of the refrigeration copper pipes, heating is conducted at the lower end of the welding gap of the copper pipes, the welding fluid only needs to conduct axial movement and micro radial movement, the welding fluid at the upper end evenly flows downwards, the flowing speed of the welding fluid is increased, the welding efficiency is improved, the welding gap is evenly filled with the welding fluid, and the welding quality is improved; and a welding assembly is simple in structure and convenient to implement and has great application prospects.

Description

Vertical copper pipe welding bench

Technical Field

The invention relates to the technical field of copper pipe processing, in particular to a vertical copper pipe welding workbench.

Background

All parts in the air conditioner are connected through copper pipes and then are completely sealed to form a pipeline. The 'refrigerant' is sealed in the pipeline, the pipeline is welded during the welding work of the refrigeration copper pipe, the 'refrigerant' is kept not to leak in the flowing process of the pipeline, the quality of the air conditioner is improved, and the influence on the environment is reduced.

Copper pipes are generally welded by brazing, which is a welding method for forming a firm joint by filling a gap surface of a brazed metal joint surface with liquid brazing filler metal, and the process must have two basic conditions. a) The liquid solder can wet the brazing metal and can compactly fill all gaps; b) the liquid brazing filler metal and the brazing metal perform necessary physical and chemical reactions to achieve good intermetallic bonding.

The copper pipe is at the welding process of brazing, at first use flame to heat in copper pipe one side, heat to certain extent when the copper pipe, use brazing filler metal strip contact copper pipe at the opposite side of copper pipe, the brazing filler metal strip melts at the colder layer, after forming brazing filler metal liquid, because capillary action, gradually move to the hotter side from the colder layer side of brazing filler metal liquid copper pipe, finally fill up whole copper pipe clearance, at this welding method in-process, the welding liquid needs to carry out more radial movement and axial displacement, the phenomenon that welding gap department solder is not full enough appears easily, in the welding process of copper pipe brazing, the control of its solder volume relies on workman's experience more, the beading can appear too much of solder, the solder is not enough then leads to the welding abundant, influence welding quality.

Disclosure of Invention

The invention aims to solve the problem that solder at a welding gap is not full enough in the prior art, and provides a vertical copper pipe welding workbench.

In order to achieve the purpose, the invention adopts the following technical scheme:

the vertical copper pipe welding workbench comprises a support frame, an upper clamping piece, a lower clamping piece, a welding rod clamp, a heating nozzle and a shaking box, wherein the upper clamping piece is positioned on the support frame and used for clamping an inner copper pipe, the lower clamping piece is used for clamping an outer copper pipe, and the welding rod clamp is used for clamping a welding rod. The clamping center points of the upper clamping piece and the lower clamping piece are on the same vertical straight line, and the shaking box is used for touching the welding liquid in the welding gap.

Specifically, the lower part of support frame sets up annular lower slider, the inner wall of lower slider sets up a plurality of heating nozzle of evenly arranging, but heating nozzle blowout flame for heat the copper pipe, and heat the shake box.

Further, an installation base is arranged on the lower sliding block, a suspension is fixedly arranged on one side of the installation base, one end of the suspension is movably connected with the shaking box, the lower end of the suspension is fixedly connected with the lower sliding block, a moving block is arranged at the upper end of the suspension, a flexible hanging chain is arranged between the moving block and the shaking box, a buffer part is arranged between the moving block and the suspension, and the buffer part can be a damping spring.

Further, set up the driving cylinder between shake box and the contact, the inside one end that sets up piston, extension spring and connecting rod of driving cylinder, the one end of piston is through the inner wall connection of extension spring with the driving cylinder, the other end fixed connection connecting rod of piston, the connecting rod is located and sets up horizontally telescopic link and buffer between the one end of driving cylinder and the contact, the telescopic link is cup jointed by a plurality of drums and is formed, the buffer is the spring.

Further, the interior of the shaker box is filled with water, which reduces the pressure in the shaker box in order to facilitate boiling of the water in the shaker box. The floating ball is arranged in the shaking box, a plurality of particles are arranged in the floating ball, the particles apply sinking force to the floating ball, and when the floating ball is completely immersed in the water in the shaking box, the floating ball can float in the water in the shaking box in a stationary manner.

Furthermore, the driving cylinder is communicated with the shaking box through a steam inlet pipe and a gas outlet pipe. When the tension spring is in a natural extension state, the piston is in an initial position, a connecting port of the steam inlet pipe and the driving cylinder and a connecting port of the air outlet pipe and the driving cylinder are positioned on different sides of the piston, water in the shaking box is boiled, and formed water vapor can enter the driving cylinder through the steam inlet pipe to push the piston to move; when the piston moves at the extreme position, namely the piston props against the inner wall of the end part of the driving cylinder, the piston does not move any more, the connecting port of the steam inlet pipe and the driving cylinder and the connecting port of the air outlet pipe and the driving cylinder are positioned at the same side of the piston, and at the moment, steam in the driving cylinder enters the shaking box through the air outlet pipe.

In the invention, the steam inlet pipe and the steam outlet pipe are respectively provided with a corresponding one-way valve to prevent steam from guiding.

Furthermore, a plurality of upper sliding blocks which are uniformly distributed are arranged on the upper portion of the supporting frame, and a horizontal feeding oil cylinder is arranged between each upper sliding block and the corresponding welding rod clamp and used for adjusting the position of each welding rod. A quantitative ring is arranged below the welding rod clamp, and a limiting oil cylinder used for adjusting the position of the quantitative ring is arranged between the quantitative ring and the welding rod clamp. The orientation of the dosing ring satisfies the following condition: when the welding rod clamp clamps the welding rod, the welding rod passes through the quantitative ring or is coaxial with the quantitative ring.

The working process of the refrigeration copper pipe welding assembly is as follows:

the method comprises the following steps: and calculating the volume of the welding gap by combining the outer diameter of the inner copper pipe and the inner diameter of the outer copper pipe to obtain the solder with standard quantity, so as to obtain the target melting length of the welding rod, mounting the welding rod on a welding rod clamp, and adjusting the position of the quantitative ring by using a limiting oil cylinder to enable the quantitative ring to be positioned at the target melting length. The standard quantity of the solder is as follows: the volume of the welding rod melted is the same as the volume of the welding gap, i.e. the cross-sectional area and length of the welding rod are equal to the volume of the welding gap. The standard amount of solder is used for keeping the amount of the soldering liquid matched with the direction of the soldering gap, so that the phenomenon that the soldering liquid is insufficient or the soldering liquid is excessive and is kept at the bottom of the soldering gap to form a tumor is avoided.

Step two: the upper clamping piece is used for clamping the inner copper pipe, the lower clamping piece is used for clamping the outer copper pipe, the upper clamping piece and the lower clamping piece move close to each other, the inner copper pipe is inserted into the outer copper pipe, a welding gap is formed between the outer wall of the inner copper pipe and the overlapping portion of the inner wall of the outer copper pipe, the position of the lower sliding block is adjusted simultaneously, the heating nozzle is aligned to the lower portion of the welding gap, the tension spring is in a natural extension state at the moment, the piston is in an initial position, and the contact head is not in contact with the outer copper pipe.

Step three: opening the heating nozzle, heating the outer part of the outer copper pipe by flame sprayed by the heating nozzle, driving the upper sliding block and the feeding oil cylinder when the copper pipe is heated to a proper temperature, enabling one end of the welding rod to be positioned at an inlet at the upper end of the welding gap, melting the end part of the welding rod under the influence of the heat pipe, and reducing the flame of the heating nozzle to enable the welding rod to form continuous heat supply for the shaking box;

when the copper pipe is heated by flame, the water in the shaking box is heated by the flame, so that the water in the shaking box boils, the floating ball floats in the shaking box, the shaking box shakes, meanwhile, the water in the shaking box boils to form water vapor, the water vapor can enter the driving cylinder through the steam inlet pipe to push the piston to move, when the piston moves at the extreme position, the piston abuts against the inner wall of the end part of the driving cylinder, the piston does not move any more, a connecting port of the steam inlet pipe and the driving cylinder and a connecting port of the air outlet pipe and the driving cylinder are positioned at the same side of the piston, the steam in the driving cylinder enters the shaking box through the air outlet pipe, the contact head is stably pressed on the outer wall of the outer copper pipe at the moment, the shaking of the shaking box is transmitted to the outer copper pipe through the contact head, and the welding liquid positioned in the welding gap is touched, so that the welding liquid can uniformly reach all parts of the welding gap, and the welding is full.

Step four: the feeding oil cylinder works all the time, the welding rod is kept continuously fed, the welding rod continuously melts and enters the welding gap until the welding rod melts to the position of the quantitative ring, the welding rod does not contact the copper pipe any more and stops melting, and in the process, the lower sliding block drives the shaking box to continuously move downwards to touch the welding liquid in the welding gap from top to bottom.

Step five: and when the standard amount of the welding liquid completely enters the welding gap, stopping heating the nozzle to supply heat to the shaking box.

The invention has the beneficial effects that:

1. this vertical copper pipe weldment work platform is used for the welding of refrigeration copper pipe, heats at the weld gap lower extreme of copper pipe, and the welding liquid only needs to carry out axial motion and micro radial motion, makes the upper end welding liquid evenly downflow for the speed that the welding liquid flows improves welding efficiency, and makes the welding liquid evenly be full of the weld gap, improves welding quality, and welding assembly simple structure, and the implementation of being convenient for has application prospect.

2. This vertical copper pipe weldment work platform is through water as the medium, utilizes the heat of copper pipe heating to obtain the kinetic energy that makes the welding liquid shake and the pressure that drives the contact and press in outer copper pipe, has realized the make full use of the energy.

Drawings

FIG. 1 is a schematic structural view of the vertical copper pipe welding bench;

FIG. 2 is a schematic structural view of the vertical copper pipe welding bench A;

FIG. 3 is a schematic structural diagram of a shaking box of the vertical copper pipe welding workbench;

FIG. 4 is a schematic structural diagram of the vertical copper pipe welding worktable at a shaking box in a top view;

FIG. 5 is a schematic structural view of the vertical copper pipe welding bench at the position of a heating nozzle;

fig. 6 is a schematic structural view of the welding rod clamp of the vertical copper pipe welding workbench.

In the figure: 1. a support frame; 2. an upper clamping member; 3. a lower clamping member; 4. a lower slide block; 5. heating the nozzle; 6. a jitter box; 7. a welding rod clamp; 8. an inner copper tube; 9. an outer copper tube; 10. a suspension; 11. an upper slide block; 12. a feeding oil cylinder; 13. welding a rod; 14. installing a base; 15. a contact head; 16. welding a gap; 17. a moving block; 18. a buffer member; 19. a chain is hung; 20. a telescopic rod; 21. a buffer member; 22. a floating ball; 23. a dosing ring; 24. a limiting oil cylinder; 25. driving steel; 251. a piston; 252. drawing and bouncing; 253. a connecting rod; 61. a steam outlet pipe; 62. an air inlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, the vertical copper pipe welding bench includes a support frame 1, an upper clamping member 2 positioned on the support frame 1 and clamping an inner copper pipe 8, a lower clamping member 3 clamping an outer copper pipe 9, a welding rod clamp 7 clamping a welding rod 13, a heating nozzle 5, and a shaking box 6. The centre points of the upper clamping piece 2 and the lower clamping piece 3 are on the same vertical straight line, and the shaking box 6 is used for touching the welding liquid in the welding gap.

Specifically, referring to fig. 5, the lower portion of the support frame 1 is provided with an annular lower slider 4, the inner wall of the lower slider 4 is provided with a plurality of heating nozzles 5 which are uniformly arranged, and the heating nozzles 5 can eject flames for heating the copper pipe and the shaking box 6.

Further, referring to fig. 2, 3, and 4, an installation base 14 is disposed on the lower slider 4, a suspension 10 is fixedly disposed on one side of the installation base 14, one end of the suspension 10 is movably connected to the shaking box 6, a lower end of the suspension 10 is fixedly connected to the lower slider 4, a moving block 17 is disposed at an upper end of the suspension 10, a flexible suspension chain 19 is disposed between the moving block 17 and the shaking box 6, a buffer 18 is disposed between the moving block 17 and the suspension 10, and the buffer 18 may be a damping spring.

Further, referring to fig. 3, a driving cylinder 25 is arranged between the shaking box 6 and the contact head 15, one end of a piston 251, a tension spring 252 and a connecting rod 253 are arranged inside the driving cylinder 25, one end of the piston 251 is connected with the inner wall of the driving cylinder 25 through the tension spring 252, the other end of the piston 251 is fixedly connected with the connecting rod 253, the connecting rod 253 is located between one end of the driving cylinder 25 and the contact head 15 and is provided with a horizontal telescopic rod 20 and a buffer member 21, the telescopic rod 20 is formed by sleeving a plurality of cylinders, and the buffer member 21 is a spring.

Further, the inside of the shake box 6 is filled with water, and the pressure in the shake box 6 is lowered in order to make the water in the shake box 6 easily boil. Referring to fig. 2, a floating ball 22 is disposed inside the shaking box 6, a plurality of particles are disposed inside the floating ball 22, the particles apply a sinking force to the floating ball 22, and when the floating ball 22 is completely immersed in the water in the shaking box 6, the floating ball 22 can float in the water in the shaking box 6.

Further, the driving cylinder 25 is communicated with the shaking box 6 through a steam inlet pipe 61 and a gas outlet pipe 62. When the tension spring 252 is in a natural extension state, the piston 251 is in an initial position, the connecting port of the steam inlet pipe 61 and the driving cylinder 25 and the connecting port of the air outlet pipe 62 and the driving cylinder 25 are positioned on different sides of the piston 251, water in the shaking box 6 is boiled, and formed water vapor can enter the driving cylinder 25 through the steam inlet pipe 61 to push the piston 251 to move; when the piston 251 is moved to the limit position, that is, the piston 251 is pressed against the inner wall of the end of the driving cylinder 25, the piston 251 is not moved any more, the connecting port of the steam inlet pipe 61 and the driving cylinder 25 and the connecting port of the air outlet pipe 62 and the driving cylinder 25 are positioned at the same side of the piston 251, and the steam in the driving cylinder 25 enters the shaking box 6 through the air outlet pipe 62.

In the invention, the steam inlet pipe 61 and the steam outlet pipe 62 are respectively provided with a corresponding one-way valve to prevent steam from guiding.

Further, the upper portion of the support frame 1 is provided with a plurality of upper sliding blocks 11 which are uniformly distributed, and referring to fig. 6, a horizontal feeding oil cylinder 12 is arranged between the upper sliding blocks 11 and the welding rod clamp 7 and used for adjusting the position of a welding rod 13. A quantitative ring 23 is arranged below the welding rod clamp 7, and a limiting oil cylinder 24 used for adjusting the position of the quantitative ring 23 is arranged between the quantitative ring 23 and the welding rod clamp 7. The orientation of the dosing ring 23 satisfies the following condition: when the rod holder 7 holds the welding rod 13, said welding rod 13 passes through the dosing ring 23 or is coaxial with the dosing ring 23.

the method comprises the following steps: and calculating the volume of the welding gap 16 by combining the outer diameter of the inner copper pipe 8 and the inner diameter of the outer copper pipe 9 to obtain the solder with the standard quantity, so that the solder with the standard quantity can obtain the target melting length of the welding rod 13, mounting the welding rod 13 on the welding rod clamp 7, and adjusting the position of the quantitative ring 23 through the limiting oil cylinder 24 to enable the quantitative ring 23 to be positioned at the target melting length position.

Step two: the upper clamping piece 2 is used for clamping the inner copper pipe 8, the lower clamping piece 3 is used for clamping the outer copper pipe 9, the upper clamping piece 2 and the lower clamping piece 3 move close to each other, so that the inner copper pipe 8 is inserted into the outer copper pipe 9, a welding gap 16 is formed between the outer wall of the inner copper pipe 8 and the overlapped part of the inner wall of the outer copper pipe 9, the position of the lower sliding block 4 is adjusted simultaneously, the heating nozzle 5 is aligned to the lower part of the welding gap 16, the tension spring 252 is in a natural extension state at the moment, the piston 251 is in an initial position, and the contact head 15 is not in contact with the outer copper pipe 9.

Step three: opening the heating nozzle 5, heating the outer part of the outer copper pipe 9 by flame sprayed by the heating nozzle 5, driving the upper slide block 11 and the feeding oil cylinder 12 when the copper pipe is heated to a proper temperature, enabling one end of the welding rod 13 to be positioned at an inlet at the upper end of the welding gap 16, melting the end part of the welding rod 13 under the influence of the heat pipe, and reducing the flame of the heating nozzle 5 to enable the flame to continuously supply heat to the shaking box 6;

when the copper pipe is heated by flame, the water in the shaking box 6 is heated by the flame, so that the water in the shaking box 6 is boiled, the floating ball 22 is floated in the shaking box 6, the shaking box 6 is shaken, meanwhile, the water in the shaking box 6 is boiled to form water vapor, the water vapor can enter the driving cylinder 25 through the vapor inlet pipe 61 to push the piston 251 to move, when the piston 251 moves to be at the limit position, namely the piston 251 is propped against the inner wall of the end part of the driving cylinder 25, the piston 251 does not move any more, a connecting port of the vapor inlet pipe 61 and the driving cylinder 25 and a connecting port of the vapor outlet pipe 62 and the driving cylinder 25 are positioned at the same side of the piston 251, at the moment, the vapor in the driving cylinder 25 enters the shaking box 6 through the vapor outlet pipe 62, at the moment, the contact head 15 is stably pressed on the outer wall of the outer copper pipe 9, the shaking box 6 is transferred to the outer copper pipe 9 through the contact head 15, the welding liquid in the welding gap 16 is touched, so that the welding liquid can uniformly reach all positions of the welding gap, so that the weld is filled.

Step four: the feeding oil cylinder 12 works all the time, the welding rod 13 is kept continuously fed, the welding rod 13 continuously melts and enters the welding gap 16, until the welding rod 13 melts to the position of the quantitative ring 23, the welding rod does not contact the copper pipe any more and stops melting, and in the process, the lower sliding block 14 drives the shaking box 6 to continuously move downwards to touch the welding liquid in the welding gap 16 from top to bottom.

Step five: when the standard amount of the welding liquid completely enters the welding gap 16, the heating of the shaking box 6 by the heating nozzle 5 is stopped.

The vertical copper pipe welding workbench in the embodiment is used for welding the refrigeration copper pipe, the lower end of the welding gap of the copper pipe is heated, the welding liquid only needs to move axially and move in a micro radial mode, the welding liquid at the upper end flows downwards uniformly, the flowing speed of the welding liquid is accelerated, the welding efficiency is improved, the welding gap is filled with the welding liquid uniformly, the welding quality is improved, and the welding assembly is simple in structure, convenient to implement and wide in application prospect.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The vertical copper pipe welding workbench is characterized by comprising a support frame (1), an upper clamping piece (2) which is positioned on the support frame (1) and used for clamping an inner copper pipe (8), a lower clamping piece (3) used for clamping an outer copper pipe (9), a welding rod clamp (7) used for clamping a welding rod (13), a heating nozzle (5) and a shaking box (6);

the lower part of support frame (1) sets up annular lower slide block (4), the inner wall of lower slide block (4) sets up a plurality of heating nozzle (5) of evenly arranging, set up installation base (14) on lower slide block (4), installation base (14) one side is fixed and is set up suspension (10), the one end swing joint of suspension (10) shakes box (6), one side of shaking box (6) sets up contact head (15), set up driving cylinder (25) between shake box (6) and contact head (15), the inside one end that sets up piston (251), extension spring (252) and connecting rod (253) of driving cylinder (25), the one end of piston (251) is through the inner wall connection of extension spring (252) with driving cylinder (25), the other end fixed connection connecting rod (253) of piston (251), connecting rod (253) are located and set up horizontal telescopic link (20) and buffer (21) between one end of driving cylinder (25) and contact head (15) and buffer (253) ) The driving cylinder (25) is communicated with the shaking box (6) through a steam inlet pipe (61) and a gas outlet pipe (62);

the inside of shake box (6) sets up floater (22), the inside of floater (22) sets up a plurality of particulate matters.

2. The vertical copper pipe welding bench according to claim 1, wherein when the tension spring (252) is in a natural extension state, the piston (251) is in an initial position, and the connection port of the steam inlet pipe (61) and the driving cylinder (25) and the connection port of the air outlet pipe (62) and the driving cylinder (25) are located on different sides of the piston (251);

when the piston (251) is in the limit position, the connecting port of the steam inlet pipe (61) and the driving cylinder (25) and the connecting port of the air outlet pipe (62) and the driving cylinder (25) are positioned on the same side of the piston (251).

3. The vertical copper pipe welding workbench according to claim 1, wherein a plurality of upper sliding blocks (11) are uniformly distributed on the upper portion of the support frame (1), a horizontal feeding oil cylinder (12) is arranged between the upper sliding blocks (11) and the welding rod fixture (7), a quantitative ring (23) is arranged below the welding rod fixture (7), and a limiting oil cylinder (24) for adjusting the position of the quantitative ring (23) is arranged between the quantitative ring (23) and the welding rod fixture (7).

4. Vertical copper tube welding bench according to claim 3, characterized in that the orientation of the dosing ring (23) satisfies the following condition: when the welding rod clamp (7) clamps the welding rod (13), the welding rod (13) passes through the quantitative ring (23) or is coaxial with the quantitative ring (23).

5. The vertical copper pipe welding workbench according to claim 1, wherein the lower end of the suspension (10) is fixedly connected with the lower sliding block (4), the upper end of the suspension (10) is provided with a moving block (17), a flexible suspension chain (19) is arranged between the moving block (17) and the shaking box (6), and a buffer (18) is arranged between the moving block (17) and the suspension (10).

6. The vertical copper pipe welding bench according to claim 1, characterized in that when the floating ball (22) is completely immersed in the water in the shaking box (6), the floating ball (22) can float in the water in the shaking box (6) at rest.