Circulating vapor phase soldering device

Abstract

A circulating vapor phase soldering device, which comprises: a liquid storage tank (10), the liquid storage tank (10) being used for storing a vapor phase liquid; a preheating apparatus (20), the preheating apparatus (20) being connected to the liquid storage tank (10) and heating the vapor phase liquid to a first temperature; a heating cavity (30), the heating cavity (30) being connected to the preheating apparatus (20) and being used for heating the vapor phase liquid until same evaporates, so as to heat a workpiece; a recovery apparatus (40), the recovery apparatus (40) being connected to the heating cavity (30) and the liquid storage tank (10), and being used for recovering the vapor phase liquid from the heating cavity (30) into the liquid storage tank (10); and a piping system (50), the piping system (50) being used for driving the vapor phase liquid to sequentially enter, from the liquid storage tank (10), the preheating apparatus (20), the heating cavity (30) and the recovery apparatus (40), and for driving the vapor phase liquid to enter the liquid storage tank (10) from the recovery apparatus (40). The liquid storage tank (10), the preheating apparatus (20), the heating cavity (30) and the recovery apparatus (40) are connected into a loop by means of the piping system, such that after soldering is completed, the vapor phase liquid can flow back into the liquid storage tank (10) for storage, thereby realizing full cyclic utilization of the vapor phase liquid during a soldering process, improving the utilization efficiency of the vapor phase liquid, reducing resource consumption, and lowering production and processing costs.

Description

A circulating gas phase welding device

[0001] This application is based on and claims priority to Chinese Patent Application No. 202411352246.5, filed on September 26, 2024, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of gas phase welding, more specifically to a circulating gas phase welding device.

[0003] BACKGROUND

[0004] Gas phase welding is a technology that uses high-temperature gas generated by the evaporation of gas phase liquid to heat and weld workpieces. The core step of the welding process is to heat the gas phase liquid to the evaporation state to utilize the steam to conduct heat to the workpiece, so that the workpiece is heated. However, in the existing gas phase welding process, the gas phase liquid is directly discharged to the external environment after evaporation, which cannot be effectively recycled and reused, resulting in waste of resources and increasing the cost of production and processing.

[0005] SUMMARY

[0006] The present application aims to overcome the defects of the prior art and provide a circulating gas phase welding device to solve the technical problem of discharging gas phase liquid to the external environment in the existing gas phase welding device.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solution:

[0008] A circulating gas phase welding device, comprising:

[0009] a liquid storage tank for storing gas phase liquid;

[0010] a preheating device connected to the liquid storage tank and heating the gas phase liquid to a first temperature;

[0011] a heating cavity connected to the preheating device for heating the gas phase liquid to the evaporation state to heat the workpiece;

[0012] a recovery device connected to the heating cavity and the liquid storage tank for recovering the gas phase liquid in the heating cavity into the liquid storage tank;

[0013] a pipeline system for driving the gas phase liquid to sequentially enter the preheating device, the heating cavity, and the recovery device from the liquid storage tank, and driving the gas phase liquid to enter the liquid storage tank from the recovery device.

[0014] The heating cavity comprises a placing rack, a cavity, a cavity cover and a lifting mechanism; the cavity is open at the top, the cavity cover is open at the bottom and is arranged correspondingly to the cavity, and the placing rack is slidingly connected to the bottom of the cavity cover; the lifting mechanism is used to drive the cavity cover to perform lifting action to move away from or close to the cavity.

[0015] The cavity cover comprises:

[0016] A cover plate, and the lifting mechanism is connected to the cover plate;

[0017] Two connecting racks, which are arranged in parallel to each other and are fixedly connected to the bottom of the cover plate;

[0018] Two guide plates, which are fixedly connected to the sides close to each other of the two connecting racks respectively; the sides close to each other of the two guide plates are both provided with guide grooves, and the placing rack is slidingly connected to the guide grooves.

[0019] The placing rack comprises:

[0020] Two side plates, which are arranged in parallel to the connecting racks; the sides away from each other of the two side plates are both provided with sliding rails, and the sliding rails are slidingly connected to the guide grooves;

[0021] Two support plates, which are arranged in parallel to each other; the support plates are arranged perpendicularly to the side plates, and the two ends of the support plates are connected to the two side plates; the two side plates and the two support plates form a horizontal frame;

[0022] A plurality of support rods, which are connected to the horizontal frame at the two ends; gaps exist between the support rods.

[0023] The heating cavity further comprises:

[0024] A cooling pipe, which is connected to the cover plate; the air outlet end of the cooling pipe extends between the horizontal frame and the cover plate;

[0025] A plurality of heating plates, which are arranged around the outer wall of the cavity and are fixedly connected to the cavity;

[0026] An air outlet pipe, which is fixedly connected to the outer wall of the cavity; the air inlet end of the air outlet pipe is arranged correspondingly to the cavity cover;

[0027] A recovery pipe, which is fixedly connected to the bottom of the cavity and extends from the cavity to the side of the cavity away from the cavity cover.

[0028] The pipeline system comprises:

[0029] The infusion tube has a liquid inlet end connected to the preheating device and an end extending into the heating cavity, and the end of the infusion tube is provided with a plurality of through holes.

[0030] The preheating device comprises:

[0031] The preheating tank comprises an outer shell and a middle cylinder, and the outer shell and the middle cylinder form an annular cavity, and the top and bottom of the middle cylinder are respectively provided with a liquid inlet pipe and a liquid outlet pipe extending out of the outer shell.

[0032] The heating rod extends from the top of the outer shell into the annular cavity, and the annular cavity is provided with heat-conducting oil.

[0033] The recovery device comprises:

[0034] The condensing tank is provided with a first inlet and a first outlet, and the first inlet is connected to the recovery pipe through the pipeline system.

[0035] The filtering tank is provided with a second inlet and a second outlet, the second inlet is connected to the first outlet through the pipeline system, and the second outlet is connected to the liquid storage tank through the pipeline system.

[0036] The filtering tank comprises:

[0037] The tank body is vertically arranged, and the second inlet and the second outlet are arranged at the top and the bottom of the tank body, respectively.

[0038] A plurality of filtering plates are sequentially connected in the tank body from top to bottom, and there is a gap between the filtering plates.

[0039] The water-cooled pipe is spirally arranged between two adjacent filtering plates, and the water inlet end and the water outlet end of the water-cooled pipe extend out of the tank body.

[0040] The vacuum device is connected to the preheating device, the heating cavity and the recovery device, and is used for vacuumizing the heating cavity and the recovery device.

[0041] Compared with the prior art, the application has the beneficial effects that the liquid storage tank, the preheating device, the heating cavity and the recovery device are connected into a loop through the pipeline system, so that the gas phase liquid can flow back to the liquid storage tank for storage after the welding is completed, realizing the full circulation and utilization of the gas phase liquid in the welding process, improving the use efficiency of the gas phase liquid, significantly reducing the resource consumption and greatly reducing the production and processing cost.

[0042] The above description is only a summary of the technical scheme of the present application. In order to make the technical means of the present application more clearly understood, the following preferred embodiments are described in detail in accordance with the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0043] Fig. 1 is a schematic diagram of the external structure of a circulating gas phase welding device provided by the present application;

[0044] Fig. 2 is a schematic diagram of the overall structure of a circulating gas phase welding device provided by the present application;

[0045] Fig. 3 is a schematic diagram of the structure of a heating cavity of a circulating gas phase welding device provided by the present application;

[0046] Fig. 4 is a schematic diagram of the structure of a cavity cover of a circulating gas phase welding device provided by the present application;

[0047] Fig. 5 is an enlarged schematic diagram of A in Fig. 4;

[0048] Fig. 6 is a schematic diagram of the structure of a placing rack of a circulating gas phase welding device provided by the present application;

[0049] Fig. 7 is a schematic diagram of the structure of a cavity body of a circulating gas phase welding device provided by the present application;

[0050] Fig. 8 is a schematic diagram of the upper view structure of a heating cavity of a circulating gas phase welding device provided by the present application;

[0051] Fig. 9 is a schematic diagram of the cross-sectional structure at B-B in Fig. 8;

[0052] Fig. 10 is a schematic diagram of the lower view structure of a cavity body of a circulating gas phase welding device provided by the present application;

[0053] Fig. 11 is a schematic diagram of the structure of a preheating device of a circulating gas phase welding device provided by the present application;

[0054] Fig. 12 is a schematic diagram of the structure of a preheating tank of a circulating gas phase welding device provided by the present application;

[0055] Fig. 13 is a schematic diagram of the cross-sectional structure at C-C in Fig. 12;

[0056] Fig. 14 is a schematic diagram of the structure of a recycling device of a circulating gas phase welding device provided by the present application;

[0057] Fig. 15 is a schematic diagram of the upper view structure of a filtering tank of a circulating gas phase welding device provided by the present application;

[0058] Fig. 16 is a schematic diagram of the cross-sectional structure at D-D in Fig. 15.

[0059] REFERENCE NUMERALS:

[0060] Liquid storage tank;

[0061] Preheating device; 21, preheating tank; 211, shell; 212, middle cylinder; 213, ring cavity; 214, liquid inlet pipe; 215, liquid outlet pipe; 216, vacuum pipe; 217, mounting cylinder; 22, heating rod; 221, fixed plate; 222, heat-conducting wire; 23, first pressure regulating valve; 24, electromagnetic valve; 25, oil inlet pipe; 26, oil tank; 27, pressure pump; 28, oil outlet pipe; 29, second pressure regulating valve;

[0062] Heating cavity; 31, placing rack; 311, side plate; 312, support plate; 313, support rod; 314, sliding rail; 3141, sliding rail body; 3142, arc-shaped part; 315, handle; 32, cavity; 33, cavity cover; 331, cover plate; 332, connecting frame; 3321, horizontal plate; 3322, vertical plate; 333, guide plate; 3331, guide plate body; 3332, limiting part; 334, guide groove; 34, lifting mechanism; 35, cooling pipe; 36, heating plate; 37, air outlet pipe; 38, recovery pipe; 39, heat insulation plate;

[0063] Recovery device; 41, condensation tank; 411, first inlet; 412, first outlet; 42, filter tank; 421, second inlet; 422, second outlet; 423, tank body; 424, filter plate; 425, water-cooled pipe;

[0064] 50, pipeline system; 51, liquid delivery pipe; 511, through hole. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and specific embodiments. The technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0066] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0067] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0068] It is further to be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term "at least one of' encompasses any and all possible combinations of one or more of the associated listed items.

[0069] Referring to Figs. 1-16, the present embodiment discloses a circulating gas phase welding apparatus, which comprises:

[0070] a liquid storage tank 10, the liquid storage tank 10 being used for storing a gas phase liquid;

[0071] a preheating device 20, the preheating device 20 being connected to the liquid storage tank 10 and heating the gas phase liquid to a first temperature;

[0072] a heating cavity 30, the heating cavity 30 being connected to the preheating device 20 and being used for heating the gas phase liquid to a temperature at which the gas phase liquid evaporates to heat a workpiece;

[0073] a recovery device 40, the recovery device 40 being connected to the heating cavity 30 and the liquid storage tank 10 and being used for recovering the gas phase liquid in the heating cavity 30 into the liquid storage tank 10;

[0074] a pipeline system 50, the pipeline system 50 being used for driving the gas phase liquid from the liquid storage tank 10 to sequentially enter the preheating device 20, the heating cavity 30 and the recovery device 40, and driving the gas phase liquid from the recovery device 40 to enter the liquid storage tank 10.

[0075] In a specific implementation, the workpiece is placed in the heating cavity 30, and the heating cavity 30 is ensured to reach a preset sealed and vacuum environment; the pipeline system 50 is controlled to transmit the gas phase liquid in the liquid storage tank 10 into the preheating device 20; the preheating device 20 preheats the gas phase liquid to the first temperature; the pipeline system 50 is controlled to transmit the preheated gas phase liquid into the heating cavity 30; the heating cavity 30 is started to heat the gas phase liquid to the second temperature, to make the gas phase liquid evaporate, and to maintain the temperature in the heating cavity 30 at the second temperature; the heating is ended, and when the temperature in the heating cavity 30 drops to the third temperature, the pipeline system 50 is controlled to transmit the gas phase liquid in the heating cavity 30 into the recovery device 40, and to transmit the gas phase liquid flowing out of the recovery device 40 into the liquid storage tank 10. In the present embodiment, the first temperature is 150°C±3°C, the second temperature is 200°C±3°C, and the third temperature is 40-50°C; in other embodiments, the first temperature, the second temperature and the third temperature can be adjusted according to actual needs.

[0076] The circulating gas phase welding device of the embodiment connects the liquid storage tank 10, the preheating device 20, the heating cavity 30 and the recovery device 40 into a loop through the pipeline system 50, so that the gas phase liquid can flow back to the liquid storage tank 10 for storage after the welding is completed, the overall recycling of the gas phase liquid in the welding process is realized, the use efficiency of the gas phase liquid is improved, the resource consumption is significantly reduced, and the production and processing cost is greatly reduced.

[0077] Referring to FIGS. 2-10, the heating cavity 30 comprises a placing rack 31, a cavity 32, a cavity cover 33 and a lifting mechanism 34; the cavity 32 is open at the top, the cavity cover 33 is open at the bottom and is arranged corresponding to the cavity 32, and the placing rack 31 is slidingly connected to the bottom of the cavity cover 33; the lifting mechanism 34 is used to drive the cavity cover 33 to perform lifting actions to move away from or close to the cavity 32.

[0078] The placing rack 31 is used to place the workpiece, and the placing rack 31 moves with the cavity cover 33, which facilitates the taking and placing of the workpiece when the cavity cover 33 is lifted. When the workpiece is taken or placed manually or by a machine, it is not necessary to stretch into the cavity 32, so that the collision of the workpiece with the components in the cavity 32 during the feeding and discharging process is avoided, and the convenience and safety of the feeding and discharging operation are ensured. The placing rack 31 is arranged to make the workpiece located above the space inside the heating cavity 30, which facilitates the transmission of the heat of the steam and avoids the contact of the liquefied gas phase liquid after heat absorption and condensation with the workpiece, so as to affect the quality of the workpiece.

[0079] Specifically, the cavity cover 33 comprises:

[0080] a cover plate 331, the lifting mechanism 34 is connected to the cover plate 331;

[0081] two connecting racks 332, the two connecting racks 332 are arranged in parallel to each other and are fixedly connected to the bottom of the cover plate 331;

[0082] two guide plates 333, the two guide plates 333 are fixedly connected to the side faces of the two connecting racks 332 which are close to each other; the side faces of the two guide plates 333 which are close to each other are each provided with a guide groove 334, and the placing rack 31 is slidingly connected to the guide groove 334.

[0083] The connecting rack 332 provides a workpiece placing space between the placing rack 31 and the cover plate 331, and the workpiece is placed between the placing rack 31, the cover plate 331 and the connecting rack 332. The guide groove 334 facilitates the smooth movement of the placing rack 31 and limits the movement direction and range of the placing rack 31, so as to ensure the stability of the placing rack 31 during the lifting of the cover plate 331 and the sliding of the placing rack 31.

[0084] Specifically, the guide plate 333 comprises a guide plate body 3331 and a limiting portion 3332; the guide plate body 3331 is connected to the connecting frame 332, and the limiting portion 3332 is formed by inwardly bending the top and bottom of the guide plate body 3331; the guide plate body 3331 and the limiting portion 3332 form the guide groove 334. The vertical section of the guide plate 333 is in the shape of a "C", and the limiting portion 3332 is arranged to form the guide groove 334 structure on the guide plate 333, and the placing frame 31 can be embedded in the guide groove 334, so that the placing frame 31 is not easy to be separated from the guide plate 333 during sliding.

[0085] Specifically, the connecting frame 332 comprises a horizontal plate 3321 and at least one vertical plate 3322; one end of the vertical plate 3322 is fixedly connected to the cover plate 331, the other end is fixedly connected to the horizontal plate 3321, the guide plate 333 is fixedly connected to the horizontal plate 3321, and the horizontal length of the vertical plate 3322 is less than that of the horizontal plate 3321. The vertical height of the vertical plate 3322 is the vertical height of the workpiece placing space, and the vertical plate 3322 is arranged in multiple and is spaced from each other, which helps to improve the ventilation effect of the workpiece placing space, thereby improving the heating and cooling effects of the workpiece and ensuring the quality of the workpiece.

[0086] Specifically, the placing frame 31 comprises:

[0087] two side plates 311, which are arranged in parallel with the connecting frame 332, and each side of the two side plates 311 away from each other is provided with a sliding rail 314 which is slidingly connected to the guide groove 334;

[0088] two support plates 312, which are arranged in parallel with each other and perpendicularly to the side plates 311, and the two ends of the support plate 312 are connected to the two side plates 311; the two side plates 311 and the two support plates 312 form a horizontal frame;

[0089] a plurality of support rods 313, the two ends of which are connected to the horizontal frame, and there is a gap between the plurality of support rods 313.

[0090] The support rods 313 are arranged at intervals, which not only ensures the stable support of the workpiece, but also increases the ventilation space at the bottom of the workpiece, so that the blockage around the workpiece is small, which is beneficial to the uniform heating of the workpiece, ensures the heating and cooling efficiency of the workpiece, and to some extent, saves the consumption of resources and improves the utilization rate of gas phase liquid.

[0091] Specifically, the placing frame 31 further comprises a handle 315; the handle 315 is fixedly connected to the support plate 312. The handle 315 facilitates manual pulling out of the placing frame 31 for workpiece loading and unloading operations.

[0092] Specifically, the slide rail 314 comprises a slide rail body 3141 and an arc-shaped portion 3142; the arc-shaped portion 3142 is bent outward from the top and bottom of the slide rail body 3141, and the curvature of the arc-shaped portion 3142 corresponds to the position of the limiting portion 3332; and the slide rail 314 and the guide groove 334 are further provided with a ball. The arc-shaped portion 3142 enhances the stability of the guide rail and effectively prevents the slide rail 314 from deviating; and the ball reduces the friction between the slide rail 314 and the guide groove 334, thereby improving the smoothness of the movement of the placing rack 31.

[0093] Specifically, the heating cavity 30 further comprises a cooling pipe 35 connected to the cover plate 331, and an air outlet end of the cooling pipe 35 extends between the horizontal frame and the cover plate 331. The cooling pipe 35 is used to deliver cold air into the workpiece placing space to cool the workpiece. The cooling pipe 35 is connected to the cover plate 331, and the air outlet end is arranged opposite to the placing rack 31, which reduces the transmission distance of the cold air, so that the cold air directly acts on the workpiece, greatly improves the cooling efficiency of the workpiece, thereby shortens the overall welding time, improves the resource utilization rate, and guarantees the economic benefits of the circulating gas phase welding equipment.

[0094] Specifically, the heating cavity 30 further comprises a plurality of heating plates 36 arranged around the outer wall of the cavity 32 and fixedly connected to the cavity 32. The heating plates 36 are arranged on the side wall and the bottom wall of the cavity 32, which ensures uniform distribution of temperature in the heating cavity 30, improves the heating efficiency, realizes efficient heating of the workpiece, and improves the welding quality and production efficiency.

[0095] Specifically, the heating cavity 30 further comprises an air outlet pipe 37 fixedly connected to the outer wall of the cavity 32, and an air inlet end of the air outlet pipe 37 is arranged opposite to the cavity cover 33. The air outlet pipe 37 is used to absorb the air of the cooling pipe 35, which facilitates to improve the air flow speed in the heating cavity 30 and realize air circulation, thereby improving the resource utilization rate.

[0096] Specifically, the heating cavity 30 further comprises a recovery pipe 38 fixedly connected to the bottom of the cavity 32 and extending from the inside of the cavity 32 to the side of the cavity 32 away from the cavity cover 33. The recovery pipe 38 is used to guide the gas phase liquid to leave the heating cavity 30, which helps to realize the recycling of the gas phase liquid.

[0097] Specifically, the heating cavity 30 further comprises a plurality of heat insulation plates 39 fixedly connected to the outer wall of the cavity 32, and the heating plates 36 are located between the heat insulation plates 39 and the cavity 32. The heat insulation plates 39 prevent the heating plates 36 from being affected by external structures, guarantee the structural stability and safety of the circulating gas phase welding equipment, and at the same time, the heat insulation plates 39 can effectively insulate heat loss, improve energy utilization efficiency, ensure the smooth progress of the welding process and guarantee the welding efficiency.

[0098] Specifically, the pipeline system 50 comprises: a liquid delivery pipe 51; the liquid delivery pipe 51 is connected to the preheating device 20 at a liquid inlet end, and the liquid delivery pipe 51 extends to the heating cavity 30 at a liquid outlet end; and the liquid outlet end of the liquid delivery pipe 51 is provided with a plurality of through holes 511. The through holes 511 facilitate the gaseous phase liquid vaporized from the liquid delivery pipe 51 to enter the inside of the heating cavity 30, and help the gaseous phase liquid after evaporation to move to the workpiece to heat the workpiece. The gaseous phase liquid is heated in the liquid delivery pipe 51, so that the gaseous phase liquid occupies and moves in a limited space, which is beneficial to rapid heating of the gaseous phase liquid and to improvement of kinetic energy of the gaseous phase liquid after evaporation, thereby improving the heating efficiency of the workpiece.

[0099] Referring to FIGS. 11-13, the preheating device 20 comprises:

[0100] a preheating tank 21, the preheating tank 21 comprising an outer shell 211 and a middle cylinder 212; an annular cavity 213 is formed between the outer shell 211 and the middle cylinder 212; the top and bottom of the middle cylinder 212 are respectively provided with a liquid inlet pipe 214 and a liquid outlet pipe 215 extending to the outside of the outer shell 211;

[0101] a heating rod 22, the heating rod 22 extending from the top of the outer shell 211 to the annular cavity 213; and the annular cavity 213 is provided with heat-conducting oil.

[0102] The preheating tank 21 of the embodiment forms the annular cavity 213 between the outer shell 211 and the middle cylinder 212, and uses the heat-conducting oil as the heat medium filling the annular cavity 213, and heats the heat-conducting oil by the heating rod 22, so that the heat of the heating rod 22 can be quickly absorbed by the heat-conducting oil and uniformly dispersed to the entire annular cavity 213, reducing heat loss, significantly improving heat transfer efficiency, and avoiding damage to the preheating tank 21 caused by local heat accumulation, and avoiding premature vaporization of the gaseous phase liquid caused by partial heating and concentration, so that the arrangement of the annular cavity 213 ensures uniform and rapid heating of the gaseous phase liquid during the preheating process, and guarantees the heating efficiency of the gaseous phase liquid and the safety of the preheating device 20.

[0103] Specifically, the outer shape of the outer shell 211 corresponds to the outer shape of the middle cylinder 212; and the middle cylinder 212 and the outer shell 211 are both in a cylindrical shape. The cylindrical design improves the compactness and stability of the preheating tank 21, thereby enhancing the durability of the preheating tank 21, and the smooth surface of the cylindrical shape is not easy to form local high or low temperature, which is conducive to uniform heat transfer and heat dissipation. In other embodiments, the middle cylinder 212 and the outer shell 211 can be in an elliptical shape, a conical shape or other shapes.

[0104] Specifically, the top of the middle cylinder 212 is provided with a vacuum pipe 216 for connecting a vacuum device. In specific implementation, the inside of the middle cylinder 212 is subjected to vacuumizing work by the vacuum device before heating of the gaseous phase liquid, so as to guarantee that the gaseous phase liquid does not contain air, thereby avoiding interference of air to the workpiece during welding to cause air bubbles on the workpiece. Therefore, the arrangement of the vacuum pipe 216 guarantees the vacuum environment of the middle cylinder 212, and further guarantees the welding quality of the workpiece.

[0105] Specifically, the number of heating rods 22 is at least two, and the at least two heating rods 22 are uniformly distributed along the ring cavity 213. The uniform distribution of the heating rods 22 enables the heat-conducting oil in the ring cavity 213 to absorb heat radiation from multiple directions, realizes multi-point balanced heating of the heat-conducting oil, improves the heating efficiency, and is beneficial to improving the rapid response of temperature control. When the temperature in the ring cavity 213 needs to be adjusted, the conduction current of each heating rod 22 is changed, and the heating rod 22 can realize rapid change of the temperature in the ring cavity 213, which is helpful to realize precise control of the temperature in the ring cavity 213 and maintain the temperature in the ring cavity 213 unchanged to achieve the preheating function.

[0106] In the embodiment, the number of heating rods 22 is four; the four heating rods 22 are circumferentially distributed in the ring cavity 213. The spacing between the four heating rods 22 is equal, which can heat the heat-conducting oil in the nearby range, and avoids mutual interference of too many heating rods 22. In other embodiments, the number of heating rods 22 can be adjusted according to actual needs.

[0107] Specifically, the outer shell 211 is provided with a mounting cylinder 217 at the top corresponding to the heating rod 22, the heating rod 22 is arranged in the mounting cylinder 217, and the heating rod 22 extends into the ring cavity 213 from the end of the mounting cylinder 217 away from the outer shell 211. The mounting cylinder 217 can guide the heating rod 22 to extend into the ring cavity 213, while avoiding the heating rod 22 from contacting the outer shell 211 and the middle cylinder 212, avoiding the outer shell 211 and the middle cylinder 212 from being directly heated and burned through, and ensuring the durability and safety of the preheating tank 21.

[0108] Specifically, the heating rod 22 includes a fixed plate 221 and a plurality of heat-conducting wires 222; the heat-conducting wires 222 are arranged in a curve on one side of the fixed plate 221, and the two ends of the heat-conducting wires 222 extend to the other side of the fixed plate 221; and the fixed plate 221 is sealingly connected to the top of the mounting cylinder 217. The heat-conducting wires 222 are arranged in a curve, which effectively increases the heat exchange area of the heat-conducting wires 222 and the heat-conducting oil, and improves the heat transfer efficiency. The two ends of the heat-conducting wires 222 extend to the side of the fixed plate 221 away from the ring cavity 213, which is convenient for current access, and the ring cavity 213 is isolated from the external environment by the fixed plate 221, avoiding the heat-conducting oil from spilling out and avoiding the external environment from affecting the heating process of the heat-conducting oil, and ensuring the service life of the preheating tank 21.

[0109] Specifically, the outlet pipe 215 is provided with a first pressure regulating valve 23 and a solenoid valve 24; the first pressure regulating valve 23 is used for adjusting the pressure in the middle cylinder 212, and the solenoid valve 24 is used for controlling the on-off and flow rate of the outlet pipe 215. The first pressure regulating valve 23 realizes accurate regulation of the pressure in the middle cylinder 212, avoids excessive pressure in the middle cylinder 212 caused by heating of the gas-phase liquid or excessive difference between the pressures in the middle cylinder 212 and the ring cavity 213, and improves the safety and reliability of the preheating tank 21. The solenoid valve 24 is arranged to facilitate flexible adjustment of the outflow speed and flow rate of the gas-phase liquid and facilitate control of the heating of the gas-phase liquid in the heating cavity 30.

[0110] Specifically, the middle cylinder 212 and the ring cavity 213 are provided with a temperature detector (not shown). The temperature detector can detect and feedback the temperature change in the ring cavity 213 in real time, facilitate timely adjustment of the current of the heating rod 22, ensure that the temperature of the gas-phase liquid in the middle cylinder 212 can be maintained at a preset temperature during the preheating process, avoid premature vaporization of the gas-phase liquid due to excessively high temperature or failure to achieve the preheating effect due to low temperature, and thus affect the welding quality of the workpiece.

[0111] Specifically, the preheating device 20 comprises an oil inlet pipe 25, an oil tank 26, and a pressure pump 27; the oil tank 26 is used for storing heat-conducting oil, the oil inlet pipe 25 is connected to the oil tank 26 and the ring cavity 213, and the pressure pump 27 is used for driving the heat-conducting oil in the oil tank 26 into the ring cavity 213. The oil tank 26 provides sufficient heat-conducting oil for the ring cavity 213, and the heat-conducting oil is driven by the pressure pump 27 to move quickly, which to some extent accelerates the regulation and control of the temperature in the ring cavity 213 and thus improves the preheating efficiency of the gas-phase liquid.

[0112] Specifically, the preheating device 20 comprises an oil outlet pipe 28 extending from the bottom of the ring cavity 213 to the oil tank 26; the oil outlet pipe 28 is provided with a second pressure regulating valve 29. The second pressure regulating valve 29 is used for adjusting the pressure in the ring cavity 213 to avoid excessive heating of the heat-conducting oil, which causes excessive pressure in the ring cavity 213, and thus ensures the safety and reliability of the preheating tank 21.

[0113] Referring to FIGS. 14-16, the recovery device 40 comprises:

[0114] a condensation tank 41 provided with a first inlet 411 and a first outlet 412, the first inlet 411 being connected to the recovery pipe 38 through the pipeline system 50;

[0115] a filter tank 42 provided with a second inlet 421 and a second outlet 422, the second inlet 421 being connected to the first outlet 412 through the pipeline system 50, and the second outlet 422 being connected to the liquid storage tank 10 through the pipeline system 50.

[0116] In specific implementation, the gas-phase liquid flows out of the recovery pipe 38 of the heating cavity 30, is cooled by the condensing tank 41, and then enters the filtering tank 42 for filtration and purification. The condensing tank 41 can cool and liquefy the high-temperature gas-phase liquid, and the cooled gas-phase liquid flows into the filtering tank 42 for further purification and removal of impurities, so as to ensure that the gas-phase liquid reaches the preset storage temperature and purity before being returned to the liquid storage tank 10. The condensing tank 41 and the filtering tank 42 are arranged to realize efficient treatment and recycling of the gas-phase liquid, improve the resource utilization rate, and reduce the volatilization of the gas-phase liquid and the pollution to the environment.

[0117] Specifically, the filtering tank 42 comprises:

[0118] The tank body 423 is vertically arranged, and the second inlet 421 and the second outlet 422 are arranged at the top and the bottom of the tank body 423, respectively.

[0119] The plurality of filtering plates 424 are sequentially connected in the tank body 423 from top to bottom, and there is a gap between the plurality of filtering plates 424.

[0120] The water-cooling pipe 425 is spirally arranged between two adjacent filtering plates 424, and the water inlet end and the water outlet end of the water-cooling pipe 425 both extend out of the tank body 423.

[0121] The water-cooling pipe 425 arranged in the filtering tank 42 can perform secondary cooling on the gas-phase liquid, thereby providing safety guarantee for storage or recycling of the gas-phase liquid. The plurality of filtering plates 424 can filter the gas-phase liquid layer by layer to remove impurities in the gas-phase liquid, thereby ensuring the purity of the gas-phase liquid output to the liquid storage tank 10.

[0122] Specifically, the filtering plates 424 are also filled with filtering materials. The filtering materials are used to adsorb particulate impurities in the gas-phase liquid, thereby improving the purity and filtering effect of the gas-phase liquid. The filtering materials include, but are not limited to, filter cotton, activated carbon, and the like.

[0123] Specifically, the pipeline system 50 comprises a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline (not shown in the figure). The two ends of the first pipeline are connected to the liquid outlet of the liquid storage tank 10 and the liquid inlet pipe 214 of the preheating device 20, respectively. The two ends of the second pipeline are connected to the liquid delivery pipe 51 and the first inlet 411 of the condensing tank 41, respectively. The two ends of the third pipeline are connected to the first outlet 412 of the condensing tank 41 and the second inlet 421 of the filtering tank 42, respectively. The two ends of the fourth pipeline are connected to the second outlet 422 and the liquid inlet of the liquid storage tank 10, respectively.

[0124] Specifically, the circulating gas phase welding device further comprises a vacuum device (not labeled in the figure) connected to the preheating device 20, the heating cavity 30 and the recovery device 40, for vacuumizing the heating cavity 30 and the recovery device 40. By vacuumizing the preheating device 20, the heating cavity 30 and the recovery device 40, the possibility of gas phase liquid contact and air retention during the whole welding process is effectively reduced, the vacuum environment of the heating cavity 30 is ensured, the influence of air on the workpiece during the welding process is avoided to cause the workpiece to produce bubbles, the welding quality of the workpiece is ensured, the defective rate of the workpiece is reduced, and the production and processing cost is further reduced.

[0125] The circulating gas phase welding device of the embodiment connects the liquid storage tank, the preheating device, the heating cavity and the recovery device into a loop through the pipeline system, so that the gas phase liquid can flow back to the liquid storage tank for storage after the welding is completed, the overall recycling of the gas phase liquid during the welding process is realized, the use efficiency of the gas phase liquid is improved, the resource consumption is significantly reduced, and the production and processing cost is greatly reduced.

[0126] The above only further illustrates the technical content of the application by way of examples, so that the reader can more easily understand, but does not represent that the embodiments of the application are limited to this, any technical extension or re-creation made according to the application is protected by the application. The protection scope of the application is subject to the claims.

Claims

1. A circulating gas phase soldering apparatus characterized by, The utility model relates to a liquid storage tank, preheating device, heating cavity, recovery device and pipeline system. The heating cavity comprises a placing frame, a cavity, a cavity cover and a lifting mechanism; the cavity is open at the top, the cavity cover is open at the bottom and corresponds to the cavity, and the placing frame is slidingly connected to the bottom of the cavity cover; the lifting mechanism is used to drive the cavity cover to perform lifting actions to move away from or close to the cavity. The cavity cover comprises a cover plate, two connecting frames, two guide plates and a lifting mechanism. The placing frame comprises two side plates, two support plates and a plurality of support rods. The heating cavity further comprises a cooling pipe, a plurality of heating plates, an air outlet pipe and a recovery pipe. The preheating device comprises a preheating tank, a heating rod and heat-conducting oil.

2. The circulating gas-phase welding apparatus according to claim 1, characterized by The recovery device comprises a condensing tank, a condensing pipe and a condenser.

3. The circulating gas-phase welding apparatus of claim 2, wherein, The pipeline system comprises a liquid delivery pipe. The preheating tank comprises an outer shell and a middle cylinder; an annular cavity is formed between the outer shell and the middle cylinder; the top and bottom of the middle cylinder are respectively provided with a liquid inlet pipe and a liquid outlet pipe extending to the outside of the outer shell. The recovery device comprises a condensing tank, a condensing pipe and a condenser. The condensing tank is provided with a first inlet and a first outlet; the first inlet is connected to the recovery pipe through the pipeline system.

4. The circulating gas-phase welding apparatus according to claim 3, wherein ​ ​ ​ ​ 5. The circulating gas-phase welding apparatus of claim 4, wherein, ​ ​ ​ ​ ​ 6. The circulating gas-phase welding apparatus of claim 5, wherein, ​ 7. The circulating gas-phase welding apparatus of claim 6, wherein, ​ ​ ​ 8. The circulating gas-phase welding apparatus of claim 7, wherein, ​ ​ The filter tank is provided with a second inlet and a second outlet, the second inlet is connected to the first outlet through the pipeline system, and the second outlet is connected to the liquid storage tank through the pipeline system.

9. The circulating gas-phase welding apparatus of claim 8, wherein, The filter tank comprises: A tank body is vertically arranged, and the second inlet and the second outlet are arranged at the top and the bottom of the tank body, respectively; A plurality of filter plates are sequentially connected in the tank body from top to bottom, and there is a gap between the plurality of filter plates; A water cooling pipe is spirally arranged between two adjacent filter plates, and the water inlet end and the water outlet end of the water cooling pipe both extend out of the tank body.

10. The circulating gas phase soldering apparatus according to any one of claims 1 to 9, characterized in that, Further comprising: a vacuum device connected to the heating cavity and the recovery device, for vacuumizing the preheating device, the heating cavity and the recovery device.

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