Energy-saving type vacuum sintering furnace for lead-calcium alloy production and using method of energy-saving type vacuum sintering furnace

Abstract

The invention relates to the technical field of lead-calcium alloy production, in particular to an energy-saving vacuum sintering furnace for lead-calcium alloy production and a using method thereof.The energy-saving vacuum sintering furnace comprises a sintering furnace body, supporting columns and a material taking tank, the multiple supporting columns are fixedly installed at the lower end of the sintering furnace body, and one side of the sintering furnace body is fixedly connected with a communicating box; a vacuum sintering structure is arranged on the inner side of the sintering furnace body, and a fused salt energy storage and heat recovery structure is arranged at the lower end of the sintering furnace body. The vacuum sintering furnace and the fused salt energy storage tank are small glass fiber reinforced plastic fused salt energy storage tanks, redundant heat can be stored in the vacuum sintering furnace and the fused salt energy storage tank according to the fused salt energy storage and heat release principle, and when the sintering furnace body needs to be heated and preheated, a medium with heat is conveyed back to the spiral heat exchange pipe through the circulating pump to preheat the interior of the sintering furnace body. Heat loss can be effectively reduced, heat efficiency application is improved, and the energy-saving effect of the energy-saving vacuum sintering furnace for lead-calcium alloy production is more obvious.

Description

Technical Field

[0001] The invention relates to the technical field of lead-calcium alloy production, and in particular to an energy-saving vacuum sintering furnace for lead-calcium alloy production. Background Art

[0002] A vacuum sintering furnace is a furnace that performs protective sintering on heated objects in a vacuum environment. There are many heating methods, such as resistance heating, induction heating, microwave heating, etc. A vacuum sintering furnace is a furnace that uses induction heating to perform protective sintering on heated objects. It can be divided into industrial frequency, medium frequency, high frequency and other types, which can be classified as a subcategory of vacuum sintering furnaces.

[0003] For example, the publication number "CN118623638A" is named as an energy-saving vacuum sintering furnace for the production of lead-calcium alloys. At the same time, the cover plate on the right side blocks the opening of the vacuum sintering furnace to avoid heat loss inside the vacuum sintering furnace when taking materials. When the next batch of lead-calcium alloys are processed, the energy consumption is reduced and the energy-saving effect is improved. However, the current energy-saving vacuum sintering furnace for the production of lead-calcium alloys has a relatively high temperature inside the sintering furnace when the lead-calcium alloy is heated and sintered inside the vacuum sintering furnace. As the sintering furnace processing process is completed, the temperature inside the sintering furnace will gradually decrease until it reaches a stable level. However, a large amount of heat will be released during the cooling process of the furnace body. The current energy-saving vacuum sintering furnace for the production of lead-calcium alloys can only reduce heat loss by heat preservation and storage, but cannot recycle this part of heat, which affects the actual energy-saving effect of the energy-saving vacuum sintering furnace for the production of lead-calcium alloys.

[0004] At the same time, the existing energy-saving lead-calcium alloy production vacuum sintering furnace must wait for the lead-calcium alloy to cool down naturally after heating before opening the sintering furnace to take out the material. The process of waiting for natural cooling is relatively slow. Therefore, the staff will mostly use additional cooling measures to quickly cool the lead-calcium alloy. However, the lead-calcium alloy is relatively hard. After high-temperature sintering, the sudden and rapid cooling will cause the lead-calcium alloy material to crack and break, which seriously affects the production quality of the energy-saving lead-calcium alloy production vacuum sintering furnace. Summary of the invention

[0005] The present invention aims to solve the problems of poor energy-saving effect and low production quality of existing energy-saving vacuum sintering furnaces for producing lead-calcium alloys, and proposes an energy-saving vacuum sintering furnace for producing lead-calcium alloys.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A vacuum sintering furnace for the production of energy-saving lead-calcium alloy is designed, comprising a sintering furnace body, support columns and a material taking tank, wherein a plurality of the support columns are fixedly mounted on the lower end of the sintering furnace body, and a plurality of the support columns are also fixedly mounted on the bottom surface of the material taking tank, a connecting box is fixedly connected to one side of the sintering furnace body, a lead-calcium alloy transverse material transport structure is arranged on the inner wall of the sintering furnace body, a vacuum sintering structure is arranged on the inner side of the sintering furnace body, a molten salt energy storage and heat recovery structure is arranged on the lower end of the sintering furnace body, a sintering furnace partition structure is arranged on the top of the connecting box, and a cooling and material taking structure is arranged on the inner side of the material taking tank.

[0008] Preferably, the lead-calcium alloy horizontal material transport structure includes an extension box and a heater. The extension box is fixedly installed on one side of the sintering furnace body. A hydraulic cylinder is fixedly installed inside the extension box. The other end of the hydraulic cylinder is fixedly connected to a pushing plate. The lower end of the outer wall of the pushing plate is fixedly connected to a supporting plate. Multiple heaters are fixedly installed on both sides of the inner wall of the sintering furnace body.

[0009] Preferably, the vacuum sintering structure includes a thermal insulation layer and a vacuum pump. The thermal insulation layer is fixedly sleeved on the inside of the sintering furnace body, and a sealing layer is fixedly sleeved on the inner wall of the thermal insulation layer. The vacuum pump is fixedly installed on the external top of the sintering furnace body. An exhaust pipe is fixedly connected to one side of the vacuum pump, and exhaust holes are fixedly opened at the other ends of the two exhaust pipes.

[0010] Preferably, the molten salt energy storage and heat recovery structure includes a molten salt energy storage tank and a circulation pipe, the circulation pipe is fixedly connected to the bottom of the sintering furnace body, the lower end of the circulation pipe is fixedly connected to a molten salt heat exchanger, the other end of the molten salt heat exchanger is fixedly connected to the molten salt energy storage tank, the top of the molten salt energy storage tank is fixedly connected to a circulation pump, the other end of the circulation pump is fixedly connected to the interior of the sintering furnace body, and a control valve is fixedly installed at the end of the circulation pipe.

[0011] Preferably, a heat absorption structure is fixedly connected above the circulation pipe, and the heat absorption structure includes a limiting rod and a spiral heat exchange tube. The spiral heat exchange tube is fixedly connected to the top of the circulation pipe, and the two limiting rods are fixedly connected to one end of the inner wall of the sintering furnace body. The other side of the two limiting rods is fixedly connected to a clamping block, and the other side of the two clamping blocks is movably connected to the side wall of the push plate.

[0012] Preferably, the cooling and material-collecting structure includes a water inlet pipe and a sealing door, the sealing door is fixedly opened on the outer wall of the material-collecting tank, the outer side of the sealing door is rotatably connected to the material-collecting door through a hinge, the inner side of the material-collecting door is rotatably connected to a pin sheet, the two water inlet pipes are fixedly connected to the inner two ends of the material-collecting tank, the inner sides of the two water inlet pipes are fixedly connected to water supply pipes, the side walls of the two water supply pipes are fixedly connected to multiple shunt pipes, and the other ends of the multiple shunt pipes are fixedly connected to a cooling platform.

[0013] Preferably, the sintering furnace partition structure includes a vertical frame and a lifting plate, the vertical frame is fixedly installed on the top of the connecting box, the top of the vertical frame is threadedly connected with a threaded rod, the lower end of the threaded rod is rotatably connected with the lifting plate, the outer side of the lifting plate is slidably connected with a sealing sleeve, and the sealing sleeve is fixedly connected to the top outer wall of the connecting box.

[0014] Preferably, the top surface of the supporting plate is vertically arranged opposite to the lower end of the lifting plate, and the lower part of the other end of the supporting plate is slidably arranged relative to the upper part of the cooling platform.

[0015] Preferably, a temperature measuring meter is fixedly mounted on the top of the sintering furnace body, and the lower end of the temperature measuring meter is fixedly arranged above the interior of the sintering furnace body.

[0016] A method for using the energy-saving vacuum sintering furnace for producing lead-calcium alloy:

[0017] S1. The hydraulic cylinder is fixedly arranged on one side of the sintering furnace body through an extension box. After the hydraulic cylinder is connected to the power supply and turned on, it can drive the push plate to move horizontally left and right inside the sintering furnace body. The support plate is used to place the lead-calcium alloy material that needs to be heated and sintered. When discharging the material, first open the sealing door at the position of the material tank 4, and then the hydraulic cylinder pushes the support plate to slide toward the sealing door. The staff will place the lead-calcium alloy material on the support plate, and then close the sealing door. The hydraulic cylinder starts in the reverse direction to pull the push plate to send the support plate back to the inside of the sintering furnace body. The heater uses an electric heating element resistance wire carbon rod to generate high-temperature heat after power is turned on to heat the material in the heating furnace cavity of the sintering furnace body;

[0018] S2. The insulation layer is made of aluminum silicate fiber insulation material, which also has good high temperature resistance and can withstand long-term work in high temperature environment. The sealing layer is a layer of metal stainless steel material sleeved on the inner wall of the sintering furnace, which can reduce the effect of air leakage on the vacuum environment. Before the sintering furnace works, connect the power supply to start the vacuum pump. The vacuum pump can exhaust the air inside the sintering furnace body along the exhaust pipe and the exhaust hole at the lower end to create a vacuum environment and reduce the oxidation of the metal during the heating process.

[0019] S3. The flow of heat exchange medium can be introduced into the circulation pipeline from the outside. The molten salt heat exchanger can transfer the heat guided by the circulation pipeline to the molten salt energy storage tank for storage after conversion. The molten salt energy storage tank can be a small glass fiber reinforced plastic molten salt energy storage tank. The excess heat can be stored internally by using the principle of molten salt energy storage and heat release. Finally, when the sintering furnace body needs to be heated and preheated, the circulating pump is used to transfer the medium with heat back to the spiral heat exchange tube to preheat the inside of the sintering furnace body, which can effectively reduce heat loss.

[0020] S4. The sealing door can be turned over to open and close with the reclaiming door made of metal steel. The pin is controlled by the handle on the outer wall of the reclaiming door. The pin can be manually rotated by the handle. When the pin is rotated vertically, the distance is smaller than the reclaiming door, and the reclaiming door can be opened normally. When the reclaiming door is buckled on the outside of the sealing door and the pin is rotated horizontally, the length of the pin will be stuck on the inner wall of the sealing door, which can limit the opening of the reclaiming door.

[0021] S5. The water inlet pipe can be connected to the external water source to deliver cold water to the internal water supply pipe. The side walls of the two water supply pipes are fixedly connected with multiple shunt pipes, which will deliver the cold water to the cooling system. The cooling platforms on both sides use cold water heat exchange to lower the temperature inside the material tank, which can gently accelerate the heat dissipation effect of the heated lead-calcium alloy above the support plate.

[0022] The present invention proposes an energy-saving vacuum sintering furnace for the production of lead-calcium alloy, which has the beneficial effects that a small fiberglass molten salt energy storage tank can be used as the molten salt energy storage tank, which can store excess heat internally by utilizing the principles of molten salt energy storage and heat release. When the sintering furnace body needs to be heated and preheated, a circulating pump is utilized to transport the medium with heat back to the spiral heat exchange tube to preheat the inside of the sintering furnace body, which can effectively reduce heat loss, improve thermal efficiency, and make the energy-saving effect of the energy-saving vacuum sintering furnace for the production of lead-calcium alloy more obvious.

[0023] The water inlet pipe can be connected to the external water source to deliver cold water to the internal water supply pipe. The side walls of the two water supply pipes are fixedly connected with multiple branch pipes. The branch pipes will deliver the cold water to the cooling table. The cooling tables on both sides use cold water heat exchange to reduce the temperature inside the material tank, which can gently accelerate the heat dissipation effect of the heated lead-calcium alloy above the support plate. In this way, the heated lead-calcium alloy can be cooled quickly and will not crack due to uneven cooling, thereby improving the processing quality of the energy-saving vacuum sintering furnace for the production of lead-calcium alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 for Figure 1 A front cross-sectional schematic diagram of

[0026] Figure 3 for Figure 1 A schematic top view of the top surface;

[0027] Figure 4 for Figure 2 A magnified schematic diagram of part A;

[0028] Figure 5 for Figure 2 A magnified schematic diagram of part B;

[0029] Figure 6 for Figure 2 A magnified schematic diagram of part C;

[0030] Figure 7 for Figure 2 An enlarged schematic diagram of part D in the middle;

[0031] Figure 8 for Figure 2 Enlarged schematic diagram of part E in the middle.

[0032] In the figure: 1. sintering furnace body, 2. support column, 3. connecting box, 4. material taking tank, 5. lead-calcium alloy horizontal material transport structure, 51. extension box, 52. hydraulic cylinder, 53. push plate, 54. support plate, 55. heater, 6. vacuum sintering structure, 61. insulation layer, 62. sealing layer, 63. vacuum pump, 64. exhaust pipe, 65. exhaust hole, 7. molten salt energy storage heat recovery structure, 71. molten salt energy storage tank, 72. molten salt heat exchanger, 73. circulation pipeline , 74, control valve, 75, circulation pump, 8, heat absorption structure, 81, tightening block, 82, limit rod, 83, spiral heat exchange tube, 9, sintering furnace partition structure, 91, vertical frame, 92, threaded rod, 93, lifting plate, 94, sealing sleeve, 10, cooling and material taking structure, 101, water inlet pipe, 102, water supply pipe, 103, diverter pipe, 104, cooling table, 105, sealing door, 106, material taking door, 107, pin, 11, temperature measuring meter. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Embodiment 1:

[0035] See also Figure 1-8In the present embodiment, an energy-saving vacuum sintering furnace for the production of lead-calcium alloy includes a sintering furnace body 1, support columns 2 and a material taking tank 4, wherein a plurality of support columns 2 are fixedly installed at the lower end of the sintering furnace body 1, and the support columns 2 vertically weld the sintering furnace body 1 and the material taking tank 4 to the ground to form a support, and a plurality of support columns 2 are also fixedly installed on the bottom surface of the material taking tank 4, and a connecting box 3 is fixedly connected to one side of the sintering furnace body 1, and the left and right sides of the connecting box 3 connect the sintering furnace body 1 and the material taking tank 4, and a lead-calcium alloy horizontal material transport structure 5 is provided on the inner wall of the sintering furnace body 1, and a vacuum sintering structure 6 is provided on the inner side of the sintering furnace body 1, and a molten salt energy storage and heat recovery structure 7 is provided at the lower end of the sintering furnace body 1, a sintering furnace partition structure 9 is provided at the top of the connecting box 3, and a cooling and material taking structure 10 is provided on the inner side of the material taking tank 4.

[0036] The lead-calcium alloy horizontal material transport structure 5 includes an extension box 51 and a heater 55. The extension box 51 is fixedly installed on one side of the sintering furnace body 1. A hydraulic cylinder 52 is fixedly installed inside the extension box 51. The other end of the hydraulic cylinder 52 is fixedly connected to a pushing plate 53. The hydraulic cylinder 52 is fixedly set on one side of the sintering furnace body 1 through the extension box 51. After the hydraulic cylinder 52 is connected to the power supply and turned on, it can drive the pushing plate 53 to move horizontally left and right on the inside of the sintering furnace body 1. The lower end of the outer wall of the pushing plate 53 is fixedly connected to a supporting plate 54.

[0037] The support plate 54 is used to place the lead-calcium alloy material that needs to be heated and sintered. When discharging the material, first open the sealed door 105 at the position of the material taking tank 4, and then the hydraulic cylinder 52 pushes the support plate 54 to slide toward the sealed door 105. The staff places the lead-calcium alloy material on the support plate 54, and then closes the sealed door 105. The hydraulic cylinder 52 starts in reverse to pull the push plate 53 to send the support plate 54 back to the inside of the sintering furnace body 1. Multiple heaters 55 are fixedly installed on both sides of the inner wall of the sintering furnace body 1. The heater 55 uses an electric heating element resistance wire carbon rod to generate high-temperature heat after being energized to heat the material in the heating furnace cavity of the sintering furnace body 1.

[0038] The vacuum sintering structure 6 includes an insulation layer 61 and a vacuum pump 63. The insulation layer 61 is fixedly sleeved inside the sintering furnace body 1. The insulation layer 61 is made of aluminum silicate fiber insulation material, which also has good high temperature resistance and can withstand long-term work in a high temperature environment. The inner wall of the insulation layer 61 is fixedly sleeved with a sealing layer 62. The sealing layer 62 is a layer of metal stainless steel material sleeved on the inner wall of the sintering furnace, which can reduce the effect of air leakage on the vacuum environment.

[0039] The vacuum pump 63 is fixedly installed on the external top of the sintering furnace body 1. An exhaust pipe 64 is fixedly connected to one side of the vacuum pump 63. Before the sintering furnace works, the power is connected to start the vacuum pump 63. The vacuum pump 63 can discharge the air inside the sintering furnace body 1 along the exhaust pipe 64 and the exhaust hole 65 at the lower end to create a vacuum environment and reduce the oxidation of the metal during the heating process. The other ends of the two exhaust pipes 64 are fixedly provided with exhaust holes 65.

[0040] The molten salt energy storage and heat recovery structure 7 includes a molten salt energy storage tank 71 and a circulation pipe 73. The circulation pipe 73 is fixedly connected to the bottom of the sintering furnace body 1. The circulation pipe 73 is wound inside the sintering furnace body 1 with a spiral spiral heat exchange tube 83. The inside of the circulation pipe 73 can be introduced with flowing heat exchange medium from the outside. The lower end of the circulation pipe 73 is fixedly connected with a molten salt heat exchanger 72. The molten salt heat exchanger 72 is a tube bundle heat exchanger model made of stainless steel material, which can convert the heat guided by the circulation pipe 73 and transport it to the molten salt energy storage tank 71 for storage.

[0041] The other end of the molten salt heat exchanger 72 is fixedly connected to a molten salt energy storage tank 71. The molten salt energy storage tank 71 can be a small glass fiber reinforced plastic molten salt energy storage tank, which can store excess heat internally by utilizing the principle of molten salt energy storage and heat release. A circulation pump 75 is fixedly connected to the top of the molten salt energy storage tank 71. Finally, when the sintering furnace body 1 needs to be heated and preheated, the circulating pump 75 is used to transport the medium with heat back to the spiral heat exchange tube 83 to preheat the inside of the sintering furnace body 1, which can effectively reduce heat loss and improve thermal efficiency. The other end of the circulating pump 75 is fixedly connected to the inside of the sintering furnace body 1, and a control valve 7 is fixedly installed at the end of the circulation pipe 73;

[0042] The circulation pipe 73 is wound together with the spiral heat exchange tube 83 inside the sintering furnace body 1. The circulation pipe 73 can be filled with flowing heat exchange medium from the outside. The molten salt heat exchanger 72 can transfer the heat guided by the circulation pipe 73 to the molten salt energy storage tank 71 for storage after conversion. The molten salt energy storage tank 71 can be a small fiberglass molten salt energy storage tank, which can store excess heat internally by utilizing the principles of molten salt energy storage and heat release. Finally, when the sintering furnace body 1 needs to be heated and preheated, the circulating pump 75 is used to transport the medium with heat back to the spiral heat exchange tube 83 to preheat the inside of the sintering furnace body 1, which can effectively reduce heat loss, improve thermal efficiency, and make the energy-saving effect of the energy-saving vacuum sintering furnace for the production of energy-saving lead-calcium alloy more obvious.

[0043] A heat absorption structure 8 is fixedly connected to the top of the circulation pipe 73, and the heat absorption structure 8 includes a limit rod 82 and a spiral heat exchange tube 83. The spiral heat exchange tube 83 is fixedly connected to the top of the circulation pipe 73. The two limit rods 82 are fixedly connected to one end of the inner wall of the sintering furnace body 1. The tightening block 81 welded to the front end of the limit rod 82 can limit the retracted position of the push plate 53, so that the hydraulic cylinder 62 will not squeeze the spiral heat exchange tube 83 on the rear side when pulling back the push plate 53. The other side of the two limit rods 82 is fixedly connected to the tightening block 81, and the other side of the two tightening blocks 81 is movably connected to the side wall of the push plate 53.

[0044] The cooling and feeding structure 10 includes a water inlet pipe 101 and a sealing door 105. The sealing door 105 is fixedly opened on the outer wall of the feeding tank 4. The outer side of the sealing door 105 is rotatably connected to the feeding door 106 through a hinge. The sealing door 105 cooperates with the feeding door 106 made of metal steel to be flipped to open and close. The inner side of the feeding door 106 is rotatably connected to a pin piece 107. The pin piece 107 is controlled by a handle on the outer wall of the feeding door 106. The pin piece 107 can be manually rotated using the handle. When the pin piece 107 rotates vertically, the distance is smaller than the feeding door 106, and the feeding door 106 can be opened normally.

[0045] When the material taking door 106 is buckled on the outside of the sealing door 105 and the pin piece 107 is rotated horizontally, the length of the pin piece 107 will be stuck on the inner wall of the sealing door 105, which can limit the opening of the material taking door 106. The two water inlet pipes 101 are fixedly connected to the two ends of the inside of the material taking tank 4. The inner sides of the two water inlet pipes 101 are fixedly connected with the water supply pipe 102. The water inlet pipe 101 can be connected to the external water source to send cold water to the internal water supply pipe 102. The side walls of the two water supply pipes 102 are fixedly connected with multiple shunt pipes 103. The shunt pipes 103 will transport the cold water to the cooling 104. The cooling platforms 104 on both sides use cold water heat exchange to reduce the temperature inside the material taking tank 4, which can gently accelerate the heat dissipation effect of the lead-calcium alloy after heating above the supporting plate 54. The other ends of the multiple shunt pipes 103 are fixedly connected with the cooling platform 104;

[0046] The water inlet pipe 101 can be connected to an external water source to deliver cold water to the internal water supply pipe 102. The side walls of the two water supply pipes 102 are fixedly connected with multiple shunt pipes 103. The shunt pipes 103 will deliver the cold water to the cooling platform 104. The cooling platforms 104 on both sides use cold water heat exchange to reduce the temperature inside the material tank 4, which can gently accelerate the heat dissipation effect of the heated lead-calcium alloy above the support plate 54. In this way, the heated lead-calcium alloy can be cooled efficiently and will not crack due to uneven cooling, thereby improving the processing quality of the energy-saving vacuum sintering furnace for the production of lead-calcium alloy.

[0047] How to use the energy-saving vacuum sintering furnace for lead-calcium alloy production:

[0048] Energy-saving vacuum sintering furnace for lead-calcium alloy production is used for heating and sintering of lead-calcium alloy to save energy and reduce heat loss;

[0049] Sintering heating process of vacuum sintering furnace for energy-saving lead-calcium alloy production:

[0050] S1. The hydraulic cylinder 52 is fixedly arranged on one side of the sintering furnace body 1 through the extension box 51. After the hydraulic cylinder 52 is connected to the power supply and turned on, it can drive the push plate 53 to move horizontally left and right inside the sintering furnace body 1. The support plate 54 is used to place the lead-calcium alloy material that needs to be heated and sintered. When discharging the material, first open the sealing door 105 at the position of the material taking tank 4, and then the hydraulic cylinder 52 pushes the support plate 54 to slide toward the sealing door 105. The staff places the lead-calcium alloy material on the support plate 54, and then closes the sealing door 105. The hydraulic cylinder 52 is reversely started to pull the push plate 53 to send the support plate 54 back to the inside of the sintering furnace body 1. The heater 55 uses an electric heating element resistance wire carbon rod to generate high-temperature heat after being energized to heat the material in the heating furnace cavity of the sintering furnace body 1;

[0051] Vacuum heating structure of energy-saving vacuum sintering furnace for lead-calcium alloy production:

[0052] S2. The heat insulation layer 61 is made of aluminum silicate fiber insulation material, which also has good high temperature resistance and can withstand long-term work in a high temperature environment. The sealing layer 62 is a layer of metal stainless steel material sleeved on the inner wall of the sintering furnace, which can reduce the effect of air leakage on the vacuum environment. Before the sintering furnace is working, the power supply is connected to start the vacuum pump 63. The vacuum pump 63 can exhaust the air inside the sintering furnace body 1 along the exhaust pipe 64 and the exhaust hole 65 at the lower end to create a vacuum environment and reduce the oxidation of the metal during the heating process.

[0053] Energy-saving molten salt energy storage structure of vacuum sintering furnace for energy-saving lead-calcium alloy production:

[0054] S3. The flow pipe 73 can be filled with a flowing heat exchange medium from the outside. The molten salt heat exchanger 72 can transfer the heat guided by the flow pipe 73 to the molten salt energy storage tank 71 for storage after conversion. The molten salt energy storage tank 71 can be a small glass fiber reinforced plastic molten salt energy storage tank. The excess heat can be stored in the molten salt energy storage tank by using the principle of molten salt energy storage and heat release. Finally, when the sintering furnace body 1 needs to be heated and preheated, the circulating pump 75 is used to transfer the medium with heat back to the spiral heat exchange tube 83 to preheat the inside of the sintering furnace body 1, which can effectively reduce heat loss.

[0055] Energy-saving vacuum sintering furnace for lead-calcium alloy production feeding structure:

[0056] S4, the sealing door 105 can be turned over to open and close with the feeding door 106 made of metal steel, and the pin piece 107 is controlled by the handle on the outer wall of the feeding door 106. The pin piece 107 can be manually rotated by the handle. When the pin piece 107 is rotated vertically, the distance is smaller than the feeding door 106, and the feeding door 106 can be opened normally. When the feeding door 106 is buckled on the outer side of the sealing door 105 and the pin piece 107 is rotated horizontally, the length of the pin piece 107 will be stuck on the inner wall of the sealing door 105, which can limit the opening of the feeding door 106;

[0057] S5. The water inlet pipe 101 can be connected to an external water source to deliver cold water to the internal water supply pipe 102. The side walls of the two water supply pipes 102 are fixedly connected to multiple shunt pipes 103. The shunt pipes 103 will deliver the cold water to the cooling platform 104. The cooling platforms 104 on both sides use cold water heat exchange to lower the temperature inside the material tank 4, which can gently accelerate the heat dissipation effect of the lead-calcium alloy above the supporting plate 54 after heating.

[0058] Embodiment 2:

[0059] See also Figure 1-8 In the present embodiment, an energy-saving vacuum sintering furnace for producing lead-calcium alloy includes a sintering furnace partition structure 9 including a vertical frame 91 and a lifting plate 93. The vertical frame 91 is fixedly installed on the top of the connecting box 3. The top of the vertical frame 91 is threadedly connected with a threaded rod 92. The vertical frame 91 can control the rotation of the threaded rod 92. The lower end of the threaded rod 92 is rotatably connected with a lifting plate 93. The lifting plate 93 can be controlled by the threaded rod 92 to move up and down inside the connecting box 3. When the supporting plate 54 is controlled by the hydraulic cylinder 52 to move horizontally, when passing through the material taking tank 4, the lifting plate 93 rises and does not block the inside of the connecting box 3.

[0060] After the hydraulic cylinder 52 pulls the support plate 54 into the sintering furnace body 1, the staff twists the threaded rod 92 at the top to rotate, and the threaded rod 92 will push the lifting plate 93 downward to fall. The lifting plate 93 blocks the inner side of the connecting box 3, thereby limiting the heat loss and being able to heat to the specified temperature in the shortest time. The outer side of the lifting plate 93 is slidably connected with a sealing sleeve 94. The sealing sleeve 94 is made of stainless steel with rubber material that fits tightly to the outer wall of the lifting plate 93. In this way, the sealing sleeve 94 can reduce air leakage inside the connecting box 3 and improve the effect of vacuum sintering. The sealing sleeve 94 is fixedly connected to the top outer wall of the connecting box 3.

[0061] The top surface of the supporting plate 54 is vertically opposed to the lower end of the lifting plate 93, and the lower part of the other end of the supporting plate 54 is slidably arranged relative to the upper part of the cooling platform 104. A temperature measuring meter 11 is fixedly installed on the top of the sintering furnace body 1, and the lower end of the temperature measuring meter 11 is fixedly arranged above the interior of the sintering furnace body 1. The temperature measuring meter 11 can be an electronic thermometer, and the sensor can be extended into the interior of the sintering furnace body 1. The high temperature data in the furnace can be displayed at the upper pointer position in real time, which is convenient for the staff to control the temperature.

[0062] Working principle:

[0063] The vertical frame 91 can control the rotation of the threaded rod 92, and the lower end of the threaded rod 92 is rotatably connected to a lifting plate 93, and the lifting plate 93 can be controlled by the threaded rod 92 to move up and down inside the connecting box 3. When the supporting plate 54 is controlled by the hydraulic cylinder 52 to move horizontally, when passing through the material taking tank 4, the lifting plate 93 rises and will not block the inside of the connecting box 3. After the hydraulic cylinder 52 pulls the supporting plate 54 into the sintering furnace body 1, the staff twists the threaded rod 92 at the top to rotate, and the threaded rod 92 will push the lifting plate 93 downward to fall, and the lifting plate 93 blocks the inside of the connecting box 3, thus limiting heat loss and being able to heat to the specified temperature in the shortest time. The sealing sleeve 94 is made of stainless steel with rubber material that fits tightly to the outer wall of the lifting plate 93, so that the sealing sleeve 94 can reduce air leakage inside the connecting box 3 and improve the effect of vacuum sintering.

[0064] Although the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An energy-saving vacuum sintering furnace for producing lead-calcium alloy, comprising a sintering furnace body (1), a support column (2) and a material taking tank (4), wherein a plurality of the support columns (2) are fixedly mounted on the lower end of the sintering furnace body (1), and a plurality of the support columns (2) are also fixedly mounted on the bottom surface of the material taking tank (4), characterized in that: A connecting box (3) is fixedly connected to one side of the sintering furnace body (1); a lead-calcium alloy transverse material transport structure (5) is provided on the inner wall of the sintering furnace body (1); a vacuum sintering structure (6) is provided on the inner side of the sintering furnace body (1); a molten salt energy storage and heat recovery structure (7) is provided at the lower end of the sintering furnace body (1); a sintering furnace partition structure (9) is provided at the top of the connecting box (3); and a cooling material taking structure (10) is provided on the inner side of the material taking tank (4).

2. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 1, characterized in that: The lead-calcium alloy transverse material transport structure (5) comprises an extension box (51) and a heater (55), wherein the extension box (51) is fixedly installed on one side of the sintering furnace body (1), a hydraulic cylinder (52) is fixedly installed inside the extension box (51), the other end of the hydraulic cylinder (52) is fixedly connected to a push plate (53), the lower end of the outer wall of the push plate (53) is fixedly connected to a support plate (54), and a plurality of heaters (55) are fixedly installed on both sides of the inner wall of the sintering furnace body (1).

3. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 1, characterized in that: The vacuum sintering structure (6) comprises a heat insulating layer (61) and a vacuum pump (63); the heat insulating layer (61) is fixedly sleeved inside the sintering furnace body (1); the inner wall of the heat insulating layer (61) is fixedly sleeved with a sealing layer (62); the vacuum pump (63) is fixedly installed on the external top of the sintering furnace body (1); one side of the vacuum pump (63) is fixedly connected to an exhaust pipe (64); and the other ends of the two exhaust pipes (64) are fixedly provided with exhaust holes (65).

4. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 1, characterized in that: The molten salt energy storage and heat recovery structure (7) comprises a molten salt energy storage tank (71) and a circulation pipe (73), wherein the circulation pipe (73) is fixedly connected to the bottom of the sintering furnace body (1), the lower end of the circulation pipe (73) is fixedly connected to a molten salt heat exchanger (72), the other end of the molten salt heat exchanger (72) is fixedly connected to the molten salt energy storage tank (71), the top of the molten salt energy storage tank (71) is fixedly connected to a circulation pump (75), the other end of the circulation pump (75) is fixedly connected to the inside of the sintering furnace body (1), and the end of the circulation pipe (73) is fixedly installed with a control valve (74).

5. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 4, characterized in that: A heat absorption structure (8) is fixedly connected to the top of the circulation pipe (73), and the heat absorption structure (8) includes a limiting rod (82) and a spiral heat exchange tube (83). The spiral heat exchange tube (83) is fixedly connected to the top of the circulation pipe (73), and the two limiting rods (82) are fixedly connected to one end of the inner wall of the sintering furnace body (1). The other side of the two limiting rods (82) is fixedly connected to a clamping block (81), and the other side of the two clamping blocks (81) is movably connected to the side wall of the push plate (53).

6. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 1, characterized in that: The cooling and material taking structure (10) comprises a water inlet pipe (101) and a sealing door (105); the sealing door (105) is fixedly opened on the outer wall of the material taking tank (4); the outer side of the sealing door (105) is rotatably connected to a material taking door (106) via a hinge; the inner side of the material taking door (106) is rotatably connected to a pin sheet (107); the two water inlet pipes (101) are fixedly connected to the inner two ends of the material taking tank (4); the inner sides of the two water inlet pipes (101) are fixedly connected to a water supply pipe (102); the side walls of the two water supply pipes (102) are fixedly connected to a plurality of shunt pipes (103); the other ends of the plurality of shunt pipes (103) are fixedly connected to a cooling platform (104).

7. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 1, characterized in that: The sintering furnace partition structure (9) comprises a vertical frame (91) and a lifting plate (93); the vertical frame (91) is fixedly mounted on the top of the connecting box (3); the top of the vertical frame (91) is threadedly connected to a threaded rod (92); the lower end of the threaded rod (92) is rotatably connected to the lifting plate (93); the outer side of the lifting plate (93) is slidably connected to a sealing sleeve (94); and the sealing sleeve (94) is fixedly connected to the outer wall of the top of the connecting box (3).

8. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 2, characterized in that: The top surface of the supporting plate (54) is arranged vertically opposite to the lower end of the lifting plate (93), and the lower part of the other end of the supporting plate (54) is arranged to slide relative to the upper part of the cooling platform (104).

9. The energy-saving vacuum sintering furnace for producing lead-calcium alloy according to claim 1, characterized in that: A temperature measuring meter (11) is fixedly mounted on the top of the sintering furnace body (1), and a lower end of the temperature measuring meter (11) is fixedly arranged above the interior of the sintering furnace body (1).

10. The method for using the energy-saving vacuum sintering furnace for producing lead-calcium alloy according to any one of claims 1 to 9, characterized in that: S1. The hydraulic cylinder is fixedly arranged on one side of the sintering furnace body through an extension box. After the hydraulic cylinder is connected to the power supply and turned on, it can drive the push plate to move horizontally left and right inside the sintering furnace body. The support plate is used to place the lead-calcium alloy material that needs to be heated and sintered. When discharging the material, first open the sealing door at the position of the material tank 4, and then the hydraulic cylinder pushes the support plate to slide toward the sealing door. The staff will place the lead-calcium alloy material on the support plate, and then close the sealing door. The hydraulic cylinder starts in the reverse direction to pull the push plate to send the support plate back to the inside of the sintering furnace body. The heater uses an electric heating element resistance wire carbon rod to generate high-temperature heat after power is turned on to heat the material in the heating furnace cavity of the sintering furnace body; S2. The insulation layer is made of aluminum silicate fiber insulation material, which also has good high temperature resistance and can withstand long-term work in high temperature environment. The sealing layer is a layer of metal stainless steel material sleeved on the inner wall of the sintering furnace, which can reduce the effect of air leakage on the vacuum environment. Before the sintering furnace works, connect the power supply to start the vacuum pump. The vacuum pump can exhaust the air inside the sintering furnace body along the exhaust pipe and the exhaust hole at the lower end to create a vacuum environment and reduce the oxidation of the metal during the heating process. S3. The flow of heat exchange medium can be introduced into the circulation pipeline from the outside. The molten salt heat exchanger can transfer the heat guided by the circulation pipeline to the molten salt energy storage tank for storage after conversion. The molten salt energy storage tank can be a small glass fiber reinforced plastic molten salt energy storage tank. The excess heat can be stored internally by using the principle of molten salt energy storage and heat release. Finally, when the sintering furnace body needs to be heated and preheated, the circulating pump is used to transfer the medium with heat back to the spiral heat exchange tube to preheat the inside of the sintering furnace body, which can effectively reduce heat loss. S4. The sealing door can be turned over to open and close with the reclaiming door made of metal steel. The pin is controlled by the handle on the outer wall of the reclaiming door. The pin can be manually rotated by the handle. When the pin is rotated vertically, the distance is smaller than the reclaiming door, and the reclaiming door can be opened normally. When the reclaiming door is buckled on the outside of the sealing door and the pin is rotated horizontally, the length of the pin will be stuck on the inner wall of the sealing door, which can limit the opening of the reclaiming door. S5. The water inlet pipe can be connected to the external water source to deliver cold water to the internal water supply pipe. The side walls of the two water supply pipes are fixedly connected with multiple shunt pipes, which will deliver the cold water to the cooling system. The cooling platforms on both sides use cold water heat exchange to lower the temperature inside the material tank, which can gently accelerate the heat dissipation effect of the heated lead-calcium alloy above the support plate.

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