Double-heat-storage roller hearth type heating furnace

Abstract

The invention discloses a double-heat-storage roller hearth type heating furnace, and relates to the technical field of heating furnaces. The heating furnace comprises a heating furnace shell, and a heating chamber is formed in the heating furnace shell. A driving rod is rotatably mounted on a heating furnace shell, a cavity is formed in a conveying roller, the driving rod is connected with the conveying roller, when the driving rod rotates, a connecting rod slides in a V-shaped groove, so that a pressurizing plate slides in the cavity in a reciprocating mode, airflow located in a heating chamber is sucked into the cavity through an air inlet, and the airflow in the heating chamber is pumped into the conveying roller through an air outlet; the baffle plate shields the communication between the connecting pipe and the concentration shell, at the moment, the internal energy of airflow in the cavity is increased through repeated pressurization of the pressurization plate, the temperature of the airflow is increased, and when the air pressure is larger than the force applied to the baffle plate by the abutting spring, the airflow enters the preheating shell through the concentration shell and the preheating pipe to preheat a workpiece; and the temperature change amplitude of the workpieces entering the heating chamber is reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heating furnaces, and in particular to a double heat storage roller bottom heating furnace. Background Art

[0002] The tunnel roller-hearth soaking furnace is a heating furnace with a chamber-shaped furnace chamber. The furnace bottom is composed of furnace rollers and a transmission mechanism. The workpiece is moved out of the furnace from the feed end by the rotation of the furnace rollers.

[0003] The existing roller hearth furnace transports objects via rollers when in use and transports them to a heating chamber for heating processing. However, during processing, the workpiece is directly transported to the heating furnace for heating, which causes the temperature of the workpiece surface to change rapidly, causing the workpiece to expand too quickly when heated, making its internal structure susceptible to damage, and easily causing damage to the workpiece during processing.

[0004] Therefore, the present invention proposes a double heat storage roller hearth heating furnace to improve this problem. Summary of the invention

[0005] The purpose of the present application is to solve the problems in the above-mentioned background technology, and the present application provides a double heat storage roller bottom heating furnace.

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

[0007] A double heat storage roller hearth heating furnace, comprising a heating furnace shell, a heating chamber being provided on the shell, and further comprising:

[0008] A transport roller is rotatably mounted in the heating chamber, a cavity is formed on the transport roller, a driving rod is rotatably mounted on the outer shell of the heating furnace, the driving rod is connected to the transport roller, two V-shaped grooves are formed on the driving rod, the two V-shaped grooves are interconnected, a pressure plate is movably mounted in the cavity, the pressure plate is slidably matched with the outer shell of the heating furnace, a connecting rod is mounted on the pressure plate, a protrusion is constructed on the free end of the connecting rod, the protrusion is slidably mounted in the V-shaped groove, an air inlet is formed on the circumferential side of the transport roller, and the air inlet allows the airflow in the heating chamber to enter the cavity in one direction;

[0009] A connecting pipe is rotatably mounted on the transport roller, the connecting pipe is connected to the cavity, a centralizing shell is mounted on the outer shell of the heating furnace, the centralizing shell is connected to the connecting pipe, a shielding plate is slidably mounted in the centralizing shell through a resisting spring, and the shielding plate is used to connect or disconnect the connecting pipe and the centralizing shell;

[0010] The preheating shell is installed at the feed port of the heating furnace shell. The concentrating shell is equipped with a preheating pipe, which is used to connect the concentrating shell with the preheating shell. A preheating roller is rotatably installed in the preheating shell.

[0011] Furthermore, an exhaust pipe is installed on the outer shell of the heating furnace, an interlayer is opened on the wall thickness of the exhaust pipe, a recovery pipe connected with the interlayer is installed on the exhaust pipe, a preheating cavity is opened on the preheating roller, and a recovery shell is installed on the outer shell of the heating furnace, and the recovery shell is used to connect the preheating cavity with the recovery pipe.

[0012] Furthermore, a rotating rod is installed on one of the transport rollers, and the rotating rod passes through the heating furnace shell and is located outside. A rotating plate is installed on the end of the rotating rod, and a driving block is eccentrically installed on the rotating plate. A sliding groove is provided on the driving block. A flow pipe connected to the interlayer is installed on the exhaust pipe, and a driving shell is installed on the flow pipe. A piston is slidably installed on the driving shell, and a sliding rod slidably matched with the sliding groove is installed on the piston. A one-way pipe is installed on the driving shell, and the one-way pipe is used to allow external airflow to enter the driving shell in one direction.

[0013] Furthermore, a limiting block is installed in the concentrated shell through a connecting spring, a limiting groove for inserting the limiting block is opened on the side wall of the baffle plate, and an arc surface is opened on the side wall of the limiting block. When the limiting block is connected to the limiting groove, the sliding of the baffle plate in the concentrated shell is restricted.

[0014] Furthermore, the transport roller is provided with an air inlet pipe at the air inlet, and the air inlet pipe is used to separate the surface of the transport roller into a plurality of areas for accommodating different workpieces.

[0015] Furthermore, the connecting pipe is L-shaped, and the height of the side of the connecting pipe communicating with the cavity is lower than the height of the side of the connecting pipe connected with the centralizing shell, so that the height of the centralizing shell is higher than the height of the transport roller.

[0016] Furthermore, a U-shaped tube is installed on the recovery tube, and the recovery tube is connected to the exhaust pipe through the U-shaped tube, so that the height of the connection position between the recovery tube and the exhaust pipe is higher than the height of the connection position between the flow tube and the exhaust pipe.

[0017] Furthermore, a guide rod is installed on the limiting block, and a guide hole that is slidably matched with the guide rod is opened in the concentrating shell.

[0018] Furthermore, a shaped plate is installed on the outer shell of the heating furnace, and there is a spacing between two parallel sides of the shaped plate for accommodating the connecting rod.

[0019] Furthermore, an arc plate is installed in the preheating shell, the arc of the arc plate faces the heating chamber, and the arc plate is installed at the feed inlet of the preheating shell.

[0020] The beneficial effects of this application are as follows:

[0021] The present application comprises a driving rod rotatably installed on the outer shell of the heating furnace, a cavity is opened on the transport roller, and the driving rod is connected to the transport roller. When the driving rod rotates, the connecting rod slides in the V-groove, so that the pressure plate slides back and forth in the cavity, and the airflow in the heating chamber is sucked into the cavity through the air inlet, and the baffle plate blocks the connection between the connecting pipe and the concentrating shell. At this time, the internal energy of the airflow in the cavity is increased by repeated pressurization of the pressure plate, so that its temperature rises. When the air pressure is greater than the force applied by the resistance spring to the baffle plate, the airflow passes through the concentrating shell and the preheating tube and enters the preheating shell to preheat the workpiece, thereby reducing the amplitude of the temperature change of the workpiece when entering the heating chamber and increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;

[0023] Figure 2 It is an exploded view of some structures of this application;

[0024] Figure 3 It is a schematic diagram of the exhaust pipe and the structure thereon of the present application;

[0025] Figure 4 This is a schematic diagram of the drive housing and the structure thereon of the present application;

[0026] Figure 5 This is a schematic diagram of the transport roller and the structure thereon of the present application;

[0027] Figure 6 It is a schematic diagram of the shell structure of the heating furnace of the present application;

[0028] Figure 7 It is an exploded view of the transport roller and the structure thereon of the present application;

[0029] Figure 8 This is an exploded view of the drive housing and the structure above it in this application;

[0030] Fig. 9 It is a three-dimensional cross-sectional view of the shell structure of the present application;

[0031] Fig.10 It is another three-dimensional cross-sectional view of the shell structure of the present application;

[0032] Fig.11 is a three-dimensional cross-sectional view of the transport roller structure of the present application;

[0033] Fig.12 It is a three-dimensional cutaway view of the preheating shell of this application;

[0034] Reference numerals: 1. heating furnace shell; 101. heating chamber; 2. transport roller; 201. cavity; 202. drive rod; 203. V-shaped groove; 204. pressure plate; 205. connecting rod; 206. air inlet; 207. air inlet pipe; 3. connecting pipe; 4. centralizing shell; 401. conflict spring; 402. shielding plate; 5. preheating shell; 501. preheating pipe; 502. preheating roller; 6. exhaust pipe; 601 , interlayer; 602, recovery tube; 603, preheating chamber; 604, recovery shell; 7, rotating rod; 8, rotating plate; 801, driving block; 802, sliding groove; 9, flow tube; 10, driving shell; 11, piston; 12, sliding rod; 13, one-way tube; 14, connecting spring; 15, limiting block; 16, limiting groove; 17, U-shaped tube; 18, guide rod; 19, guide hole; 20, U-shaped plate; 21, arc plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0036] Embodiment 1

[0037] like Figure 1 - Fig.12 As shown, a double heat storage roller hearth heating furnace proposed in the first embodiment of the present application includes a heating furnace shell 1, on which a heating chamber 101 is opened. The heating furnace shell 1 and the heating chamber 101 are prior art. The heating chamber 101 heats the workpiece by gas heating or electric heating, and also includes:

[0038] The transport roller 2 is rotatably mounted in the heating chamber 101. A cavity 201 is provided on the transport roller 2. A driving rod 202 is rotatably mounted on the heating furnace shell 1. The driving rod 202 is connected to the transport roller 2. A plate body is mounted on the driving rod 202. The plate body is in a shape of a plate body, which is connected to the transport roller 2 through the plate body. Figure 7 As shown, when the driving rod 202 rotates, the transport roller 2 can also be driven to rotate, and the driving mode of the driving rod 202 can be driven by a motor;

[0039] There are two V-shaped grooves 203 formed on the driving rod 202, and the two V-shaped grooves 203 communicate with each other. A pressure plate 204 is movably installed in the cavity 201. The pressure plate 204 can rotate and slide in the cavity 201. The pressure plate 204 is slidably fitted with the heating furnace shell 1. A connecting rod 205 is installed on the pressure plate 204. A protrusion is formed at the free end of the connecting rod 205, and the protrusion is slidably installed in the V-shaped groove 203. Since the pressure plate 204 is slidably connected to the heating furnace shell 1, when the conveying roller 2 rotates, it will not drive the pressure plate 204 to rotate. The conveying roller 2 can only rotate relative to the pressure plate 204. One end of the V-shaped groove 203 is close to the conveying roller 2, and the other two ends are far from the conveying roller 2. When it rotates, the inner wall of the V-shaped groove 203 pushes the protrusion of the connecting rod 205 to slide in the V-shaped groove 203 along the tangent direction, thereby causing the connecting rod 205 to drive the pressure plate 204 to perform a reciprocating motion;

[0040] Among them, when the driving rod 202 rotates, the space inside the U-shaped plate body is used to accommodate the connecting rod 205, so that the connecting rod 205 will not interfere with the rotation of the driving rod 202, increasing the feasibility of the device;

[0041] An air inlet 206 is formed on the circumferential side of the conveying roller 2. The air inlet 206 allows the air flow in the heating chamber 101 to enter the cavity 201 unidirectionally. A one-way valve is installed in the air inlet 206, so that the air flow can only flow unidirectionally from the heating chamber 101 to the cavity 201. When the pressure plate 204 slides in the cavity 201, when it moves away from the conveying roller 2, it sucks the air flow in the heating chamber 101 into the cavity 201, and when it slides towards the conveying roller 2, it squeezes the air flow inside the cavity 201;

[0042] A connecting pipe 3 is rotatably installed on the conveying roller 2. The connecting pipe 3 communicates with the cavity 201. A concentrating shell 4 is installed on the heating furnace shell 1. The concentrating shell 4 communicates with the connecting pipe 3. A baffle plate 402 is slidably installed in the concentrating shell 4 through a resisting spring 401. The baffle plate 402 is used to connect or disconnect the connection between the connecting pipe 3 and the concentrating shell 4. One end of the conveying roller 2 penetrates through the heating furnace shell 1 and is located outside. The connecting pipe 3 is connected to the outside end of the conveying roller 2 through a sealed bearing. When the pressure plate 204 reciprocates in the cavity 201, it continuously sucks air into the cavity 201 and pressurizes the air flow inside it. When the pressure in the connecting pipe 3 and the cavity 201 is greater than the pressure exerted by the resisting spring 401 on the baffle plate 402, the baffle plate 402 is pushed, so that the air flow enters the concentrating shell 4. When the air flow enters the concentrating shell 4, the air pressure in the cavity 2 and the connecting pipe 3 decreases, causing the resisting spring 401 to push the baffle plate 402 to reset and continue to block, and perform the next pressurization. In this way, the air in the cavity 201 and the connecting pipe 3 is worked on, increasing the internal energy of the air;

[0043] The preheating shell 5 is installed at the feeding port of the heating furnace shell 1. The concentrating shell 4 is installed with a preheating tube 501, which is used to connect the concentrating shell 4 with the preheating shell 5. A preheating roller 502 is rotatably installed in the preheating shell 5. When the airflow enters the concentrating shell 4, the interior thereof is heated. Since the concentrating shell 4 is connected with the preheating tube 501, the air inside the concentrating shell 4 is also heated, so that the preheating tube 501 heats the interior of the preheating shell 5. Since the preheating shell 5 is located at the feeding place of the heating chamber 101, the workpiece first passes through the preheating shell 5 and then enters the heating chamber 101. The workpiece is preheated in advance by the preheating shell 5, which reduces the possibility of excessive heat change on the surface of the workpiece when it enters the heating chamber 101.

[0044] In the device, the hot air in the heating chamber 101 is first sucked into the cavity 201 by suction, and then the hot air in the cavity 201 is pressurized to do work to increase its internal energy, thereby further increasing the temperature of the hot air in the cavity 201, reducing the possibility of cooling when it moves into the preheating shell 5, and increasing the practicality of the device;

[0045] Compared with the prior art, a driving rod 202 is rotatably installed on the heating furnace shell 1, a cavity 201 is opened on the transport roller 2, and the driving rod 202 is connected to the transport roller 2. When the driving rod 202 rotates, the connecting rod 205 slides in the V-groove 203, so that the pressure plate 204 slides back and forth in the cavity 201, and the air flow in the heating chamber 101 is sucked into the cavity 201 through the air inlet 206, and the baffle plate 402 blocks the connection between the connecting pipe 3 and the concentrating shell 4. At this time, the internal energy of the air flow in the cavity 201 is increased by repeated pressurization of the pressure plate 204, so that its temperature rises. When the air pressure is greater than the force applied by the resistance spring 401 to the baffle plate 402, the air flow passes through the concentrating shell 4 and the preheating tube 501 and enters the preheating shell 5 to preheat the workpiece, thereby reducing the amplitude of the temperature change of the workpiece when entering the heating chamber 101 and increasing the practicality of the device.

[0046] Embodiment 2

[0047] like Figure 3 and Fig.12 As shown, the second embodiment is based on the first embodiment and further discloses the heating furnace shell 1, the preheating roller 502, the transport roller 2 and the central shell 4. In the second embodiment, the heating furnace shell 1 is equipped with an exhaust pipe 6, and the wall thickness of the exhaust pipe 6 is provided with an interlayer 601. When the heating chamber 101 discharges the exhaust gas to the outside, the exhaust gas still contains some heat, and the airflow in the interlayer 601 is heated by heat exchange.

[0048] A recovery pipe 602 connected to the interlayer 601 is installed on the exhaust pipe 6, a preheating chamber 603 is opened on the preheating roller 502, and a recovery shell 604 is installed on the heating furnace shell 1. The recovery shell 604 is used to connect the preheating chamber 603 with the recovery pipe 602. One end of the preheating roller 502 is rotatably inserted in the recovery shell 604, and the opening of the preheating chamber 603 is located at this end. The free end of the recovery pipe 602 is also inserted in the recovery shell 604. When the airflow in the interlayer 601 is heated by the heat in the exhaust gas, it moves to the recovery shell 604 through the recovery pipe 602 or heats the air in the recovery pipe 602 and the recovery shell 604 by heat transfer, so that the air in the preheating chamber 603 is also heated, so that the heat can be transferred to the workpiece through the preheating roller 502, so that the preheating roller 502 can transport the workpiece while also preheating the workpiece, thereby increasing the practicality of the preheating roller 502.

[0049] like Figure 4 and Figure 8 As shown in the second embodiment, a rotating rod 7 is installed on one of the transport rollers 2, and the rotating rod 7 passes through the heating furnace shell 1 and is located outside. A rotating plate 8 is installed at the end of the rotating rod 7, and a driving block 801 is eccentrically installed on the rotating plate 8. The driving block 801 is provided with a sliding groove 802. Figure 1 From the main perspective, the sliding groove 802 is provided on the driving block 801 along the vertical direction. When the transport roller 2 rotates, the rotating rod 7 is driven to rotate, so that the rotating plate 8 performs a circular motion around the axis of the rotating rod 7.

[0050] The exhaust pipe 6 is provided with a flow pipe 9 connected with the interlayer 601, a drive shell 10 is provided on the flow pipe 9, a cylinder is provided on the drive shell 10, a piston 11 is slidably provided on the drive shell 10 through the cylinder, a slide bar 12 slidably matched with the slide groove 802 is provided on the piston 11, a one-way pipe 13 is provided on the drive shell 10, the one-way pipe 13 is used to allow external airflow to enter the drive shell 10 in one direction, a one-way valve is provided in the one-way pipe 13, so that the airflow can only enter the drive shell 10 through the one-way pipe 13, a plate body is provided on the slide bar 12, there are two plates, which are used to clamp the two sides of the drive block 801, so that the slide bar 12 can only slide in the slide groove 802 along the vertical direction;

[0051] When in use, when the transport roller 2 transports the workpiece, the rotating plate 8 is driven to rotate by the rotating rod 7, so that the side wall of the sliding groove 802 pulls or pushes the sliding rod 12 through the plate body on the sliding rod 12, so that the sliding rod 12 reciprocates, and then the piston 11 reciprocates in the cylinder of the driving shell 10, so that the device sucks the outside air into the driving shell 10, and then presses the air in the driving shell 10, so that the airflow enters the interlayer 601 through the flow pipe 9, so that the air in the interlayer 601 can be replenished;

[0052] A connecting passage is formed among the driving shell 10, the flow tube 9, the interlayer 601, the recovery tube 602, the preheating chamber 603 and the recovery shell 604. When the internal airflow is full, the entire passage is pressurized by the piston block 11, which also increases the internal energy of the airflow in the entire passage and the preheating effect on the workpiece. The recovery shell 604 is provided with a cover, and a pressure sensor is also installed inside. The pressure sensor is electrically connected to the buzzer alarm. When the internal pressure reaches the preset pressure peak, the buzzer alarm sounds an alarm, and the operator can open the cover of the recovery shell 604 to release the pressure, so as to facilitate the continued use of the device.

[0053] like Fig.10 As shown, in the second embodiment, a limiting block 15 is installed in the concentrated shell 4 through the connecting spring 14, and a limiting groove 16 for inserting the limiting block 15 is provided on the side wall of the baffle plate 402, and an arc surface is provided on the side wall of the limiting block 15. When the limiting block 15 is connected to the limiting groove 16, the sliding of the baffle plate 402 in the concentrated shell 4 is restricted. When the air pressure is large enough, the baffle plate 402 is squeezed, so that the guiding of the arc surface of the limiting block 15 causes the connecting spring 14 to be compressed and the limiting block 15 is separated from the limiting groove 16. When the airflow in the cavity 201 enters the concentrated shell 4, the air pressure inside the cavity 201 is reduced, so that the resistance spring 401 pushes the baffle plate 402 to reset, and then the arc surface of the limiting block 15 causes it to be inserted into the limiting groove 16 again, thereby ensuring the feasibility of the device.

[0054] When in use, the limiting block 15 is inserted into the limiting groove 16 to limit the sliding of the shielding plate 402, thereby making the shielding plate 402 required to be pushed with greater force, so that the airflow in the cavity 201 can be better pressurized, thereby increasing the practicality of the device.

[0055] like Fig.11 As shown, in embodiment 2, the transport roller 2 is provided with an air inlet pipe 207 at the air inlet 206, and the air inlet pipe 207 is used to divide the surface of the transport roller 2 into a plurality of areas for accommodating different workpieces. When in use, not only the airflow in the heating chamber 101 is guided by the air inlet pipe 207 so that the airflow in the heating chamber 101 can enter the cavity 201, but also the surface of the transport roller 2 can be partitioned, so that when the transport roller 2 transports the workpiece, different workpieces are transported separately, thereby reducing the possibility of incomplete heating caused by stacking multiple workpieces during transportation, increasing the heating effect of the device on the workpiece, and increasing the practicability of the device.

[0056] Embodiment 3

[0057] like Figure 1 and Fig.12As shown in the figure, Embodiment 3 further discloses the present application on the basis of Embodiment 2. In Embodiment 3, the connecting pipe 3 is L-shaped, and the height of the side of the connecting pipe 3 communicating with the cavity 201 is lower than the height of the side of the connecting pipe 3 connected to the concentrating shell 4, so that the height of the concentrating shell 4 is higher than the height of the conveying roller 2, so as to Figure 1 Taking the main perspective, one section of the connecting pipe 3 is in the vertically upward direction, and the other section is in the horizontal direction. The section located in the horizontal direction communicates with the cavity 201, and the section located in the vertical direction is connected to the bottom of the concentrating shell 4, so that the shielding plate 402 is not only pushed by the抵触 spring 401 to shield the nozzle of the connecting pipe 3, but also the shielding plate 402 shields the nozzle of the connecting pipe 3 through the cooperation of its own gravity, further increasing the stability of the shielding plate 402 during use, and also ensuring that a relatively large force is required to push the shielding plate 402, increasing the pressurizing effect on the air in the cavity 201.

[0058] In Embodiment 3, a U-shaped pipe 17 is installed on the recovery pipe 602. The recovery pipe 602 is connected to the exhaust pipe 6 through the U-shaped pipe 17, so that the height of the position where the recovery pipe 602 communicates with the exhaust pipe 6 is higher than the height of the position where the flow pipe 9 communicates with the exhaust pipe 6. During use, the density of hot air is less than that of cold air and will move upward, so that the hot air can enter the recovery pipe 602 through the U-shaped pipe 17, while the unheated air in the interlayer 601 and the cold air just entering the interlayer 601 from the flow pipe 9 are in the lower position and will not move into the recovery pipe 602, further increasing the heating effect of the air in the recovery pipe 602 on the air in the preheating cavity 603 and increasing the practicality of the device.

[0059] In Embodiment 3, a guide rod 18 is installed on the limiting block 15, and a guide hole 19 slidably matched with the guide rod 18 is provided in the concentrating shell 4. When the limiting block 15 slides, through the restriction of the inner wall of the guide hole 19 on the side wall of the guide rod 18, the limiting block 15 can only slide in a straight line direction, increasing the stability of the limiting block 15 during sliding.

[0060] In Embodiment 3, a C-shaped plate 20 is installed on the heating furnace shell 1. There is a spacing for accommodating the connecting rod 205 between the two parallel sides of the C-shaped plate 20. When the connecting rod 205 drives the pressing plate 204 to slide, through the shielding and restriction of the two parallel sides of the C-shaped plate 20 on the side wall of the connecting rod 205, the connecting rod 205 can only slide in a straight line direction, increasing the stability of the pressing plate 204 and the connecting rod 205 during sliding.

[0061] In the third embodiment, an arc plate 21 is installed in the preheating shell 5, the arc of the arc plate 21 faces the heating chamber 101, the arc plate 21 is installed at the feed port of the preheating shell 5, the highest point of the arc plate 21 is located at the top of the preheating shell 5, and the lowest point faces the preheating roller 502, and the preheating tube 501 is installed at the top of the preheating shell 5, so that when the airflow enters the preheating shell 5, the hot air will be guided by the arc plate 21 to move toward the direction close to the heating chamber 101 first, thereby reducing the possibility of hot air moving through the opening of the preheating shell 5 to the outside thereof, resulting in a large loss of hot air, thereby increasing the practicality of the device.

[0062] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double heat storage roller hearth heating furnace, comprising a heating furnace shell (1) on which a heating chamber (101) is provided, characterized in that: Also includes: A transport roller (2) is rotatably mounted in the heating chamber (101), a cavity (201) is provided on the transport roller (2), a driving rod (202) is rotatably mounted on the heating furnace shell (1), the driving rod (202) is connected to the transport roller (2), two V-shaped grooves (203) are provided on the driving rod (202), the two V-shaped grooves (203) are connected to each other, a pressure plate (204) is movably mounted in the cavity (201), the pressure plate (204) is slidably matched with the heating furnace shell (1), a connecting rod (205) is mounted on the pressure plate (204), a protrusion is constructed on the free end of the connecting rod (205), the protrusion is slidably mounted in the V-shaped groove (203), an air inlet (206) is provided on the circumferential side of the transport roller (2), the air inlet (206) allows the airflow in the heating chamber (101) to enter the cavity (201) in one direction; A connecting pipe (3) is rotatably mounted on the transport roller (2), the connecting pipe (3) is in communication with the cavity (201), a centralizing shell (4) is mounted on the outer shell (1) of the heating furnace, the centralizing shell (4) is in communication with the connecting pipe (3), a shielding plate (402) is slidably mounted in the centralizing shell (4) via a resisting spring (401), the shielding plate (402) is used to connect or disconnect the connecting pipe (3) and the centralizing shell (4); The preheating shell (5) is installed at the feed port of the heating furnace shell (1). The concentrating shell (4) is provided with a preheating tube (501). The preheating tube (501) is used to connect the concentrating shell (4) with the preheating shell (5). A preheating roller (502) is rotatably installed in the preheating shell (5).

2. The double heat storage roller hearth heating furnace according to claim 1, characterized in that: An exhaust pipe (6) is installed on the outer shell (1) of the heating furnace, an interlayer (601) is provided on the wall thickness of the exhaust pipe (6), a recovery pipe (602) connected to the interlayer (601) is installed on the exhaust pipe (6), a preheating chamber (603) is provided on the preheating roller (502), a recovery shell (604) is installed on the outer shell (1) of the heating furnace, and the recovery shell (604) is used to connect the preheating chamber (603) with the recovery pipe (602).

3. The double heat storage roller hearth heating furnace according to claim 2, characterized in that: A rotating rod (7) is installed on one of the transport rollers (2), and the rotating rod (7) passes through the heating furnace shell (1) and is located outside. A rotating plate (8) is installed on the end of the rotating rod (7), and a driving block (801) is eccentrically installed on the rotating plate (8). A sliding groove (802) is provided on the driving block (801). A flow pipe (9) connected to the interlayer (601) is installed on the exhaust pipe (6), and a driving shell (10) is installed on the flow pipe (9). A piston (11) is slidably installed on the driving shell (10), and a sliding rod (12) slidably matched with the sliding groove (802) is installed on the piston (11). A one-way pipe (13) is installed on the driving shell (10), and the one-way pipe (13) is used to allow external airflow to enter the driving shell (10) in a one-way direction.

4. The double heat storage roller hearth heating furnace according to claim 3, characterized in that: A limiting block (15) is installed in the concentrated shell (4) via a connecting spring (14); a limiting groove (16) for inserting the limiting block (15) is provided on the side wall of the shielding plate (402); an arc surface is provided on the side wall of the limiting block (15); when the limiting block (15) is connected to the limiting groove (16), the sliding of the shielding plate (402) in the concentrated shell (4) is limited.

5. The double heat storage roller hearth heating furnace according to claim 4, characterized in that: The transport roller (2) is provided with an air inlet pipe (207) at the air inlet (206), and the air inlet pipe (207) is used to divide the surface of the transport roller (2) into a plurality of areas for accommodating different workpieces.

6. The double heat storage roller hearth heating furnace according to claim 5, characterized in that: The connecting pipe (3) is L-shaped, and the height of the side of the connecting pipe (3) communicating with the cavity (201) is lower than the height of the side of the connecting pipe (3) connecting with the centralizing shell (4), so that the height of the centralizing shell (4) is higher than the height of the transport roller (2).

7. The double heat storage roller hearth heating furnace according to claim 6, characterized in that: The recovery pipe (602) is provided with a U-shaped pipe (17), and the recovery pipe (602) is connected to the exhaust pipe (6) via the U-shaped pipe (17), so that the height of the connection position between the recovery pipe (602) and the exhaust pipe (6) is higher than the height of the connection position between the flow pipe (9) and the exhaust pipe (6).

8. The double heat storage roller hearth heating furnace according to claim 7, characterized in that: A guide rod (18) is installed on the limiting block (15), and a guide hole (19) which is slidably matched with the guide rod (18) is provided in the centralizing shell (4).

9. The double heat storage roller hearth heating furnace according to claim 8, characterized in that: A shaped plate (20) is installed on the heating furnace shell (1), and a spacing for accommodating a connecting rod (205) is provided between two parallel sides of the shaped plate (20).

10. The double heat storage roller hearth heating furnace according to claim 9, characterized in that: An arc-shaped plate (21) is installed in the preheating shell (5), the arc of the arc-shaped plate (21) faces the heating chamber (101), and the arc-shaped plate (21) is installed at the feed inlet of the preheating shell (5).

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