Low-temperature temperature-uniform gas quenching furnace

Abstract

The application discloses a gas quenching furnace with uniform low-temperature, and is characterized in that the furnace body is provided with two supporting legs at the lower part, and the furnace body is provided with a mounting rack at one side, two rotating shaft seats are arranged on the mounting rack, rotating shafts are rotatably arranged on the two rotating shaft seats, rotating arms are fixedly arranged on the parts of the rotating shafts between the two rotating shaft seats, a fixed column is arranged through the middle position of the furnace door, four supporting pieces are connected to one end of the fixed column on the inner side of the furnace door, the supporting pieces are connected with the outer periphery of the fixed column, and the inner sides of the supporting pieces are attached to the inner side of the furnace door.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas quenching furnace equipment, in particular to a gas quenching furnace with uniform low temperature. BACKGROUND

[0002] Traditional gas quenching furnaces are heated and quenched under vacuum conditions, and the heating chamber is mainly heated by vacuum radiation. The temperature uniformity can be generally guaranteed at high temperatures (above 550 DEG C). However, below 550 DEG C, the vacuum radiation capacity of the heated material is still weak, so the temperature field in the heating chamber is very uneven. Some gas quenching furnaces currently use convection heating at low temperatures to compensate for the unevenness of the temperature, but in this convection heating, the convection gas does not form a flow channel, and the gas flow is small, only for pure gas stirring. Although it plays a role in compensating for uniformity, it is still obviously insufficient to form a complete low-temperature uniform field. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art and provide a gas quenching furnace with uniform low temperature.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions to achieve:

[0005] A gas quenching furnace with uniform low temperature, comprising a furnace body, two support legs are arranged at the lower part of the furnace body, an installation frame is arranged on one side of the furnace body, two rotating shaft seats are arranged on the installation frame, a rotating shaft is rotatably arranged on the two rotating shaft seats, a rotating arm is fixedly installed on the part of the rotating shaft between the two rotating shaft seats, a fixed column is arranged through the middle position of the furnace door, four support pieces are connected to one end of the fixed column on the inner side of the furnace door, the support pieces are connected to the outer periphery of the fixed column, the inner side of the support pieces is attached to the inner side of the furnace door, and the other end of the fixed column on the outer side of the furnace door is fixedly connected to the end of the rotating arm away from the rotating shaft; a fixing mechanism is arranged between the furnace body and the furnace door, the fixing mechanism is used to seal and connect the furnace body and the furnace door, an outer edge is arranged at one end of the furnace body close to the furnace door, the fixing mechanism comprises a fixing ring, a fixing groove is formed in the inner side of the fixing ring, the outer edge is arranged in the fixing groove, a plurality of protrusions are arranged on the outer periphery of the furnace door, the number of the protrusions is consistent with the number of the gaps, a support seat is arranged on the support leg close to the furnace door, an electric telescopic rod is hingedly connected to the support seat, a connecting lug is arranged on the outer periphery of the fixing ring, and the telescopic end of the electric telescopic rod is hingedly connected to the connecting lug.

[0006] A heating chamber is provided inside the furnace body, and baffles are provided at positions on the left and right sides of the heating chamber inside the furnace body, supporting mechanisms are provided on the front and rear side walls of the heating chamber, the supporting mechanisms are connected to the inner wall of the furnace body, movable hatches are provided at the upper and lower parts of the heating chamber, a hatch cylinder is provided at a position on the furnace body corresponding to the movable hatch, the piston rod of the hatch cylinder is connected to the movable hatch, a chamber door is provided on the left side of the heating chamber, a first exhaust fan is installed at the middle position of the left side of the chamber door through a connecting flange, a number of connecting mechanisms are installed on both sides of the chamber door, the connecting mechanisms are connected to the connecting sleeve on the inner side of the furnace door, a heating frame is provided inside the heating chamber, a number of heaters are provided in the space between the heating chamber and the heating frame, a flow equalizing plate is provided at the left position inside the heating frame, a first induced draft hood is provided at the middle position of the left side of the heating frame, the motor shaft of the first exhaust fan is connected to the first induced draft hood, and a number of ventilation holes are provided on the flow equalizing plate and on the front and rear walls of the heating frame away from the first exhaust fan;

[0007] A heat exchange chamber is provided on the right side of the heating chamber. Air dampers are hinged at the upper and lower parts of the heat exchange chamber respectively. An air damper driving mechanism is provided on the furnace body at the position corresponding to the air damper. Water tanks are provided on the left and right sides of the heat exchange chamber. Several cooling water pipes are connected between the two water tanks. Several partitions are provided in the water tanks. The partitions make the flow path of the cooling water S-shaped. Inlet and outlet pipes are provided on the water tanks. The inlet and outlet pipes extend out of the furnace body. An air inlet is provided in the middle position on the right side of the heat exchange chamber. A second induced draft hood is provided on the right side of the air inlet. A second exhaust fan is provided on the right side of the furnace body. The motor shaft of the second exhaust fan is connected to the second induced draft hood.

[0008] Preferably, a fixing plate is provided on the portion of the fixing column located outside the furnace door, a mounting plate is provided on the inner side of the end of the rotating arm away from the rotating shaft, and the fixing plate and the mounting plate are fixed by bolts and nuts.

[0009] Preferably, a sealing strip is embedded at one end of the furnace body close to the furnace door.

[0010] Preferably, a guide seat is provided on the fixing ring, a safety pin cylinder is provided on the right side of the guide seat, a safety pin is connected to the front end of the piston rod of the safety pin cylinder, a through hole is provided on the guide seat for the safety pin to pass through, and a safety pin seat is provided on the furnace door to match the safety pin.

[0011] Preferably, a trigger rod is provided on the furnace door, a sensor bracket is provided on the outer periphery of the fixing ring, and a plurality of contact sensors are mounted on the sensor bracket. The contact sensors are electrically connected to the electric telescopic rod and the safety pin cylinder.

[0012] Preferably, the damper driving mechanism includes a damper driving cylinder, the lower end of the piston rod of the damper driving cylinder is connected to the driving rod, a guide column is provided on the side of the driving rod, a guide block is provided on the damper, and a guide groove is provided on the guide block along its length direction, and the guide block is located in the guide groove.

[0013] Preferably, the supporting mechanism includes several fixing seats fixed on the inner wall of the furnace body, support plates are installed on the fixing seats, embedded plates are provided on the front and rear side walls of the heating chamber, a supporting plate is provided between the supporting plate and the embedded plate, and embedded grooves are provided on the front and rear sides of the supporting plate, and a part of the supporting plate and the embedded plate are inserted into the embedded grooves.

[0014] Preferably, a rotating seat and an articulated seat are provided at the hinge between the heat exchange chamber and the damper. The rotating seat is fixed on the heat exchange chamber, the articulated seat is fixed on the damper, and a rotating shaft is provided between the rotating seat and the articulated seat.

[0015] The beneficial effects of the present invention are: 1. In the heating state, by improving the gas flow channel in the heating chamber, heat is evenly transferred to various positions in the heating chamber, thereby ensuring temperature uniformity in the heating chamber; 2. By changing the flow direction of the gas during cooling, cooling in different directions is achieved, thereby improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0018] Figure 3 It is a partial structural diagram of the fixing mechanism in the present invention;

[0019] Figure 4 The structure of the present invention is schematically shown Figure 2 ;

[0020] Figure 5 It is a left side view of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the chamber door in the present invention;

[0022] Figure 7 for Figure 6 A magnified schematic diagram of point A in the middle;

[0023] Figure 8 The cross-sectional view of the present invention Figure 1 ;

[0024] Figure 9 for Figure 8 A magnified schematic diagram of point A in the middle;

[0025] Figure 10 for Figure 8 A magnified schematic diagram of point B in the middle;

[0026] Figure 11 The cross-sectional view of the present invention Figure 2 ;

[0027] Figure 12 is a sectional view of the present application Figure 3 ;

[0028] Figure 13 is an enlarged schematic view of A in FIG. Figure 12 ;

[0029] Figure 14 is a sectional view of the present application Figure 4 ;

[0030] Figure 15 is a sectional view of the present application Figure 5 ;

[0031] Figure 16 is an enlarged schematic view of A in FIG. Figure 15 ;

[0032] Figure 17 is a sectional view of the present application Figure 6 .

[0033] The drawing reference: furnace body 1; furnace door 2; fixed mechanism 3; heating chamber 4; guide mechanism 5; heat exchange chamber 6; support mechanism 7; mounting frame 101; rotating shaft seat 102; rotating shaft 103; rotating arm 104; outer edge 105; support leg 106; support seat 107; sealing strip 108; baffle 109; sealing block 1010; hoisting block 1011; fixed column 201; support sheet 202; fixed sheet 203; protruding block 204; guide surface 205; connecting sleeve 206; connecting seat 207; handle 208; fixed ring 301; semicircular ring 302; fixed block 303; fixed groove 304; notch 305; electric telescopic rod 306; connecting lug plate 307; tooth block 308; guide seat 309; safety pin cylinder 3010; safety pin 3011; safety pin seat 3012; trigger lever 3013; sensor support 3014; contact sensor 3015; roller 3016; hatch door 401; hatch door cylinder 402; chamber door 403; first air extractor 404; connecting mechanism 405; heating frame 406; heater 407; flow equalizing plate 408; first air guide cover 409; guide block 4011; guide rod 4012; connecting plate 4051; fixed plate 4052; connecting column 4053; support block 4054; mounting plate 501; guide wheel frame 502; guide wheel 503; adjusting block 504; air door 601; air door drive mechanism 602; water tank 603; partition 604; air inlet 605; second air guide cover 606; second air extractor 607; cooling water pipe 608; rotating seat 609; rotating shaft 6010; guide block 6011; guide groove 6012; sealing ring 6013; hinged seat 6014; air door drive cylinder 6021; drive lever 6022; guide column 6023; fixed seat 701; support plate 702; bearing plate 703; embedded plate 704. DETAILED DESCRIPTION

[0034] The accompanying drawings are referred to in Figures 1-17 The embodiments of the present application are described in detail.

[0035] A low-temperature temperature uniform gas quenching furnace, including furnace body 1, the lower part of furnace body 1 is provided with two support legs 106, one side of furnace body 1 is provided with mounting bracket 101, mounting bracket 101 is provided with two rotating shaft seats 102, two rotating shaft seats 102 are provided with rotating shaft 103, rotating shaft 103 is fixedly installed on the part between two rotating shaft seats 102, rotating arm 104 is fixedly installed on the part between two rotating shaft seats 102, fixed column 201 is arranged through the middle position of furnace door 2, one end of fixed column 201 is connected with four support pieces 202 on the inner side of furnace door 2, support piece 202 is connected with the outer periphery of fixed column 201, the inner side of support piece 202 is attached to the inner side of furnace door 2, the inner side curvature of support piece 202 is consistent with the inner side curvature of furnace door 2, so as to be closely attached, one end of fixed column 201 on the outer side of furnace door 2 is fixedly connected with the end of rotating arm 104 away from rotating shaft 103, furnace door 2 is fixed on rotating arm 104 through the cooperation and installation of fixed column 201 and support piece 202, so that furnace door 2 moves with rotating arm 104.

[0036] Fixed mechanism 3 is arranged between furnace body 1 and furnace door 2, fixed mechanism 3 is used for sealingly connecting furnace body 1 and furnace door 2, one end of furnace body 1 close to furnace door 2 is provided with outer edge 105, fixed mechanism 3 includes fixed ring 301, fixed groove 304 is arranged on the inner side of fixed ring 301, outer edge 105 is located in fixed groove 304, a plurality of protrusions 204 are arranged on the outer periphery of furnace door 2, the number of protrusions 204 is consistent with the number of notches 305, the size of protrusion 204 is slightly smaller than the size of notch 305, support seat 107 is installed on support leg 106 close to furnace door 2, electric telescopic rod 306 is hinged on support seat 107, connecting lug plate 307 is arranged on the outer periphery of fixed ring 301, the telescopic end of electric telescopic rod 306 is hinged with connecting lug plate 307, a plurality of notches 305 are arranged on the left side of fixed ring 301, so that the left side of fixed ring 301 forms a plurality of tooth blocks 308, electric telescopic rod 306 drives fixed ring 301 to rotate, so that protrusion 204 is staggered with notch 305 and is overlapped with tooth block 308, so as to clamp protrusion 204 and outer edge 105 by using fixed ring 301, so that furnace door 2 and furnace body 1 are tightly connected.

[0037] Protrusion 204 is provided with guide surface 205 on the outer side surface, when fixed ring 301 rotates counterclockwise, the inner side of tooth block 308 moves along guide surface 205 to be attached to the outer side surface of protrusion 204, the thickness of protrusion 204 at guide surface 205 is small, so that fixed ring 301 gradually clamps protrusion 204 and outer edge 105 to be sealingly connected.

[0038] The furnace body 1 is internally provided with a heating chamber 4, and the furnace body 1 is internally provided with baffles 109 on both sides of the heating chamber 4, the baffle 109 on the left side separates the heating chamber 4 from the left side of the furnace body 1 to prevent heat loss, and the baffle 109 on the right side is used to control the flow direction of the cooling gas, the support mechanism 7 is arranged on the front and rear walls of the heating chamber 4, the support mechanism 7 is connected with the inner wall of the furnace body 1, the movable hatch cover 401 is arranged on the upper and lower parts of the heating chamber 4, the hatch door cylinder 402 is arranged on the furnace body 1 corresponding to the movable hatch cover 401, the piston rod of the hatch door cylinder 402 is connected with the movable hatch cover 401, the hatch door cylinder 402 controls the opening and closing of the movable hatch cover 401, when heating, the movable hatch cover 401 is controlled to be closed, when cooling, the movable hatch cover 401 is controlled to be opened, the chamber door 403 is arranged on the left side of the heating chamber 4, the first air extractor 404 is installed on the left side of the chamber door 403 through the connecting flange, a plurality of connecting mechanisms 405 are installed on both sides of the chamber door 403, the connecting mechanisms 405 are connected with the connecting sleeves 206 on the inner side of the furnace door 2, the heating frame 406 is arranged in the heating chamber 4, a plurality of heaters 407 are arranged in the space between the heating chamber 4 and the heating frame 406, the flow uniforming plate 408 is arranged on the left side in the heating frame 406, the first air inlet hood 409 is arranged on the left side of the heating frame 406, the motor shaft of the first air extractor 404 is connected with the first air inlet hood 409, a plurality of ventilation holes are arranged on the flow uniforming plate 408, on the side of the front and rear walls of the heating frame 406 away from the first air extractor 404.

[0039] When heating, the inert gas with a certain pressure is filled in the heating chamber 4, the movable hatch cover 401 is driven to be closed and connected with the heating chamber 4 through the hatch door cylinder 402, the chamber door 403 is driven to be closed and connected with the heating chamber through the furnace door 2, so that a closed space is formed in the heating chamber 4. The first air extractor 404 is started, the gas in the heating frame 406 is extracted into the first air inlet hood 409 through the flow uniforming plate 408, so that the gas enters between the heating frame 406 and the heating chamber 4, and then returns to the heating frame 406 from the ventilation holes on the front and rear walls of the heating frame 406, to form a complete gas flow field. The heaters 407 are located in the gas flow field, heat the gas, and the airflow drives the heat to be transmitted to each region of the heating chamber 4, so that an effective uniform temperature field is formed in the heating chamber 4.

[0040] The right side of the heating chamber 4 is provided with a heat exchange chamber 6, the upper and lower parts of the heat exchange chamber 6 are respectively hinged with dampers 601, the furnace body 1 is provided with a damper driving mechanism 602 at the position corresponding to the dampers 601, the left and right sides of the heat exchange chamber 6 are both provided with water tanks 603, a plurality of cooling water pipes 608 are connected between the two water tanks 603, a plurality of partitions 604 are arranged in the water tank 603, the partitions 604 make the flow channel of the cooling water S-shaped, the water tank 603 is provided with inlet and outlet water pipes, the inlet and outlet water pipes extend out of the furnace body 1, the right side of the heat exchange chamber 6 is provided with an air inlet 605, the right side of the air inlet 605 is provided with a second air inlet hood 606, the right side of the furnace body 1 is provided with a second air exhaust fan 607, the motor shaft of the second air exhaust fan 607 is connected with the second air inlet hood 606, the cooling water enters the other side from the water tank 603 on one side through the cooling water pipe 608, due to the arrangement of the partitions 604, the cooling water in the water tank 603 on the other side returns to the water tank 603 on the side through the cooling water pipe 608, and flows in an S-shaped flow channel, so that the flow time of the cooling water in the heat exchange chamber 6 is prolonged, and the heat exchange treatment is better.

[0041] When quenching and cooling, the upper and lower movable cabin covers 401 are opened, high-pressure inert gas is filled into the furnace, the upper damper 601 is opened under the control of the damper driving mechanism 602, and the gas enters the heat exchange chamber 6 from the gap formed after the upper damper 601 is opened under the action of the second air exhaust fan 607, exchanges heat with the cooling water flowing in the cooling water pipe 608, and makes the gas temperature drop, and then the gas enters the furnace body 1 through the second air inlet hood 606 and cools the workpieces in the heating chamber 4 from bottom to top. The gas passing through the heating chamber 4 enters the heat exchange chamber 6 from the gap formed after the upper damper 601 is opened, so as to form a complete flow channel.

[0042] When the upper damper 601 is closed and the lower damper 601 is opened, the gas flows through the heating chamber 4 from top to bottom to cool the workpieces in the heating chamber 4. Switching the upper and lower dampers 601 to be opened blows the gas flow in two opposite directions to the workpieces in turn, thereby improving the cooling efficiency and the uniformity of cooling.

[0043] The part of the fixed column 201 located outside the furnace door 2 is provided with a fixed sheet 203, the inner side of the end of the rotating arm 104 away from the rotating shaft 103 is provided with a mounting disc, and the fixed sheet 203 and the mounting disc are fixed by bolts and nuts.

[0044] The fixed ring 301 is composed of two semicircular rings 302, and the connecting part of the two semicircular rings 302 is provided with a fixed block 303 for fixing.

[0045] The end of the furnace body 1 close to the furnace door 2 is embedded with a sealing strip 108.

[0046] The fixed ring 301 is provided with a guide seat 309, and the right side of the guide seat 309 is provided with a safety pin cylinder 3010. The front end of the piston rod of the safety pin cylinder 3010 is connected with a safety pin 3011. The guide seat 309 is provided with a through hole for the safety pin 3011 to pass through. The furnace door 2 is provided with a safety pin seat 3012 matched with the safety pin 3011.

[0047] The furnace door 2 is provided with a trigger rod 3013. The outer periphery of the fixed ring 301 is provided with a sensor support 3014. The sensor support 3014 is installed with a plurality of contact sensors 3015. The contact sensors 3015 are electrically connected with the electric telescopic rod 306 and the safety pin cylinder 3010.

[0048] When the furnace door 2 is closed by rotating, the convex block 204 enters the fixed groove 304 through the gap 305. The trigger rod 3013 contacts the contact sensor 3015. The contact sensor 3015 sends a signal to the electric telescopic rod 306. After receiving the signal, the electric telescopic rod 306 operates. The telescopic end of the electric telescopic rod 306 is elongated, so as to drive the fixed ring 301 to rotate counterclockwise. The fixed ring 301 clamps the convex block 204 of the furnace door 2 and the outer edge 105 of the furnace body 1.

[0049] Two or more contact sensors 3015 are installed in the middle of the sensor support 3014. One contact sensor 3015 is installed at each end. When the trigger rod 3013 contacts the contact sensors 3015 at the upper end and the lower end, it indicates that the fixed ring 301 is located at the initial position or the locking position respectively. When the fixed ring 301 is in the locking position, the contact sensor 3015 sends a signal to the safety pin cylinder 3010. The piston rod of the safety pin cylinder 3010 pushes the safety pin 3011 to extend out of the guide seat 309 and inserts into the corresponding safety pin seat 3012 on the furnace door 2, so as to fix the furnace door 2 and the fixed ring 301 relative to each other and prevent the relative rotation of the two.

[0050] The fixed ring 301 is provided with a roller 3016. The outer periphery of the roller 3016 is in contact with the outer periphery of the outer edge 105.

[0051] The furnace body 1 is provided with a plurality of guide mechanisms 5. The guide mechanism 5 comprises a mounting plate 501. The mounting plate 501 is provided with a guide wheel frame 502. The left side of the guide wheel frame 502 is rotatably provided with a guide wheel 503. The outer periphery of the guide wheel 503 is in contact with the right side end surface of the fixed ring 301. The right side of the mounting plate 501 is provided with an adjusting block 504. The adjusting block 504 is threadedly connected with an adjusting bolt. The left end of the adjusting bolt is in abutment with the right side end surface of the guide wheel frame 502. The guide wheel frame 502 is provided with a waist-shaped hole. The bolt passes through the waist-shaped hole and is screwed into the mounting plate 501, so as to fix the guide wheel frame 502 and the mounting plate 501.

[0052] The connecting mechanism 405 comprises a connecting plate 4051 fixed outside the chamber door 403, a fixed plate 4052 is arranged outside the connecting plate 4051, a connecting column 4053 is vertically connected to the fixed plate 4052, a waist-shaped hole is arranged on the fixed plate 4052, and a bolt is screwed into the connecting plate 4051 through the waist-shaped hole.

[0053] The upper and lower parts of one of the connecting mechanisms 405 are provided with support blocks 4054, the support blocks 4054 are threadedly connected with adjusting bolts, and the adjusting bolts abut against the side surface of the fixed plate 4052. The position of the fixed plate 4052 is adjusted through the adjusting bolts, so that the connecting column 4053 is aligned with the connecting sleeve 206 and connected, thereby ensuring that the chamber door 403 is accurately installed into the furnace door 2.

[0054] The side surface of the movable hatch cover 401 is provided with a guide block 4011, the inside of the furnace body 1 is provided with a guide rod 4012 matched with the guide block 4011, and the guide block 4011 and the guide rod 4012 are matched to ensure that the movable hatch cover 401 is kept stable during lifting.

[0055] The damper driving mechanism 602 comprises a damper driving cylinder 6021, the lower end of the piston rod of the damper driving cylinder 6021 is connected with a driving rod 6022, the side surface of the driving rod 6022 is provided with a guide column 6023, the damper 601 is provided with a guide block 6011, the guide block 6011 is provided with a guide groove 6012 along the length direction of the guide block 6011, and the guide block 6011 is located in the guide groove 6012.

[0056] The front end of the damper 601 is provided with a sealing ring 6013, when the damper 601 is opened, the sealing ring 6013 is in contact with the inner wall of the furnace body 1, the sealing ring 6013 fills the gap between the damper 601 and the furnace body 1, and better sealing effect is achieved.

[0057] The supporting mechanism 7 comprises a plurality of fixed seats 701 fixed on the inner wall of the furnace body 1, a supporting plate 702 is installed on the fixed seat 701, an embedded plate 704 is arranged on the front and rear side walls of the heating chamber 4, a bearing plate 703 is arranged between the supporting plate 702 and the embedded plate 704, the front and rear sides of the bearing plate 703 are provided with embedded grooves, and part of the supporting plate 702 and the embedded plate 704 are clamped into the embedded grooves. The heating chamber 4 is fixed to the middle position in the inside of the furnace body 1 through the cooperation of the supporting plate 702, the embedded plate 704 and the bearing plate 703.

[0058] The hinge joint between the heat exchange chamber 6 and the damper 601 is provided with a rotating seat 609 and a hinge seat 6014, the rotating seat 609 is fixed to the heat exchange chamber 6, the hinge seat 6014 is fixed to the damper 601, and a rotating shaft 6010 is arranged between the rotating seat 609 and the hinge seat 6014.

[0059] The sealing blocks 1010 are arranged at the four corners of the right end of the heating chamber 4 in the furnace body 1, and the right side baffle 109 is arranged between the vertically opposite two sealing blocks 1010,

[0060] When the air door 601 is opened, the side edge thereof is in contact with the sealing blocks 1010, thereby achieving the sealing effect and isolating the communication between the heating chamber 4 and the right side part of the furnace body 1, so as to control the flow direction of the air between the heating chamber 4 and the heat exchange chamber 6 and ensure the quenching cooling effect.

[0061] The upper part of the furnace body 1 is provided with a plurality of hoisting blocks 1011.

[0062] The furnace door 2 is provided with a connecting seat 207 and a handle 208, the connecting seat 207 is used to be connected with an external mechanism, and the opening and closing of the furnace door 2 is controlled through the external mechanism. The handle 208 is used for the staff to open or close the furnace door 2.

[0063] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application shall also be considered as the protection scope of the present application.

Claims

1. A low-temperature, uniform gas quenching furnace, characterized by: The invention comprises a furnace body (1), wherein two supporting legs (106) are provided at the lower part of the furnace body (1), a mounting frame (101) is provided on one side of the furnace body (1), two rotating shaft seats (102) are provided on the mounting frame (101), a rotating shaft (103) is rotatably provided on the two rotating shaft seats (102), a rotating arm (104) is fixedly installed on the part of the rotating shaft (103) located between the two rotating shaft seats (102), a fixing column (201) is provided through the middle position of the furnace door (2), one end of the fixing column (201) located on the inner side of the furnace door (2) is connected to four supporting plates (202), the supporting plates (202) are connected to the outer periphery of the fixing column (201), the inner side of the supporting plate (202) is fitted with the inner side of the furnace door (2), and one end of the fixing column (201) located on the outer side of the furnace door (2) is fixedly connected to the end of the rotating arm (104) away from the rotating shaft (103); A fixing mechanism (3) is provided between the furnace body (1) and the furnace door (2), and the fixing mechanism (3) is used to seal the furnace body (1) and the furnace door (2). An outer edge (105) is provided at one end of the furnace body (1) close to the furnace door (2). The fixing mechanism (3) comprises a fixing ring (301), a fixing groove (304) is provided on the inner side of the fixing ring (301), and the outer edge (105) is located in the fixing groove (304). A plurality of protrusions ( 204), a guide surface (205) is provided on the outer surface of the protrusion (204), the number of the protrusions (204) is consistent with the number of the notches (305), a support seat (107) is installed on the support leg (106) close to the furnace door (2), an electric telescopic rod (306) is hinged on the support seat (107), a connecting ear plate (307) is provided on the outer periphery of the fixing ring (301), and the telescopic end of the electric telescopic rod (306) is hinged to the connecting ear plate (307); A heating chamber (4) is provided inside the furnace body (1), and baffles (109) are provided at positions on both the left and right sides of the heating chamber (4) inside the furnace body (1), and support mechanisms (7) are provided on the front and rear side walls of the heating chamber (4), and the support mechanisms (7) are connected to the inner wall of the furnace body (1). A movable hatch (401) is provided at the upper and lower parts of the heating chamber (4), and a hatch cylinder (402) is provided at a position corresponding to the movable hatch (401) on the furnace body (1), and a piston rod of the hatch cylinder (402) is connected to the movable hatch (401). A chamber door (403) is provided on the left side of the heating chamber (4), and a first exhaust fan (404) is installed at the middle position of the left side of the chamber door (403) through a connecting flange. 03) A plurality of connecting mechanisms (405) are installed on both sides, the connecting mechanisms (405) are connected to the connecting sleeve (206) on the inner side of the furnace door (2), a heating frame (406) is provided inside the heating chamber (4), a plurality of heaters (407) are provided in the space between the heating chamber (4) and the heating frame (406), a flow equalizing plate (408) is provided on the left side of the heating frame (406), a first induced draft hood (409) is provided in the middle position on the left side of the heating frame (406), the motor shaft of the first exhaust fan (404) is connected to the first induced draft hood (409), and a plurality of ventilation holes are provided on the flow equalizing plate (408) and on the side of the front and rear walls of the heating frame (406) away from the first exhaust fan (404); A heat exchange chamber (6) is provided on the right side of the heating chamber (4), and dampers (601) are hingedly connected to the upper and lower parts of the heat exchange chamber (6). A damper driving mechanism (602) is provided on the furnace body (1) at a position corresponding to the damper (601). Water tanks (603) are provided on both the left and right sides of the heat exchange chamber (6), and a plurality of cooling water pipes (608) are connected between the two water tanks (603). A plurality of partitions (604) are provided in the water tanks (603). The partition (604) makes the flow path of the cooling water S-shaped. The water tank (603) is provided with an inlet and an outlet pipe, and the inlet and outlet pipes are extended out of the furnace body (1). An air inlet (605) is provided in the middle position on the right side of the heat exchange chamber (6). A second induced draft hood (606) is provided on the right side of the air inlet (605). A second exhaust fan (607) is provided on the right side of the furnace body (1). The motor shaft of the second exhaust fan (607) is connected to the second induced draft hood (606). The furnace body (1) is provided with a plurality of guide mechanisms (5), the guide mechanisms (5) comprising a mounting plate (501), a guide wheel frame (502) being provided on the mounting plate (501), a guide wheel (503) being rotatably provided on the left side of the guide wheel frame (502), the outer periphery of the guide wheel (503) being in contact with the right end face of the fixing ring (301), an adjustment block (504) being provided on the right side of the mounting plate (501), an adjustment bolt being threadedly connected to the adjustment block (504), the left end of the adjustment bolt being in contact with the right end face of the guide wheel frame (502), a waist-shaped hole being provided on the guide wheel frame (502), the bolt passing through the waist-shaped hole and being screwed into the mounting plate (501) to fix the guide wheel frame (502) and the mounting plate (501); The fixing ring (301) is provided with a guide seat (309), a safety pin cylinder (3010) is provided on the right side of the guide seat (309), a safety pin (3011) is connected to the front end of the piston rod of the safety pin cylinder (3010), a through hole for the safety pin (3011) to pass through is provided on the guide seat (309), and a safety pin seat (3012) matched with the safety pin (3011) is provided on the furnace door (2); A trigger rod (3013) is provided on the furnace door (2); a sensor bracket (3014) is provided on the outer periphery of the fixing ring (301); a plurality of contact sensors (3015) are mounted on the sensor bracket (3014); and the contact sensors (3015) are electrically connected to the electric telescopic rod (306) and the safety pin cylinder (3010).

2. A low-temperature, uniform-temperature gas quenching furnace according to claim 1, characterized in that: The portion of the fixing column (201) located outside the furnace door (2) is provided with a fixing plate (203), and the inner side of the end of the rotating arm (104) away from the rotating shaft (103) is provided with a mounting plate, and the fixing plate (203) is fixed to the mounting plate by bolts and nuts.

3. The low-temperature, uniform-temperature gas quenching furnace according to claim 1, characterized in that: The damper driving mechanism (602) comprises a damper driving cylinder (6021), the lower end of the piston rod of the damper driving cylinder (6021) is connected to a driving rod (6022), a guide column (6023) is provided on the side of the driving rod (6022), a guide block (6011) is provided on the damper (601), a guide groove (6012) is provided on the guide block (6011) along its length direction, and the guide block (6011) is located in the guide groove (6012).

4. The low-temperature, uniform-temperature gas quenching furnace according to claim 1, characterized in that: The support mechanism (7) comprises a plurality of fixing seats (701) fixed on the inner wall of the furnace body (1), a support plate (702) being mounted on the fixing seat (701), an embedded plate (704) being provided on the front and rear side walls of the heating chamber (4), a bearing plate (703) being provided between the supporting plate (702) and the embedded plate (704), and an embedded groove being provided on the front and rear sides of the bearing plate (703), and a portion of the supporting plate (702) and the embedded plate (704) being inserted into the embedded groove.

5. The low-temperature, uniform-temperature gas quenching furnace according to claim 1, characterized in that: A rotating seat (609) and an articulated seat (6014) are provided at the hinged joint between the heat exchange chamber (6) and the damper (601); the rotating seat (609) is fixed on the heat exchange chamber (6); the articulated seat (6014) is fixed on the damper (601); and a rotating shaft (6010) is provided between the rotating seat (609) and the articulated seat (6014).

Images