Sealed furnace door structure for horizontal tempering furnace

Abstract

The present invention provides a sealed furnace door structure for a horizontal tempering furnace, belonging to the technical field of horizontal tempering furnaces, comprising a furnace body, a double-axis motor is arranged at the front end of the upper surface of the furnace body, a furnace door is arranged at the front of the furnace body, a connecting groove is opened in the middle of the front of the furnace door, a horizontal sealing mechanism is arranged at the front end of the furnace door, and the horizontal sealing mechanism comprises a hydraulic cylinder; the L-shaped connecting plate and the furnace door are driven to move backward by the hydraulic cylinder, so that when the furnace door seals the front end of the furnace body, the L-shaped connecting plate moves through the tooth plate to drive the second driven gear and the rotating rod to rotate, so that the abutment plate abuts and supports the furnace door, so that when the furnace door seals the furnace body, the L-shaped connecting plate and the abutment plate can simultaneously limit and support the furnace door, and can share the force applied to the furnace door, so as to avoid the furnace door from moving outward, thereby improving the sealing effect of the furnace door, reducing the damage applied to the L-shaped connecting plate and the abutment plate, and improving the service life of the L-shaped connecting plate and the abutment plate.

Description

Technical Field

[0001] The invention belongs to the technical field of horizontal tempering furnaces, and in particular relates to a sealed furnace door structure for a horizontal tempering furnace. Background Art

[0002] Horizontal tempering furnace is mainly used for sintering of powder metallurgy products, metal injection molding products, stainless steel base, cemented carbide, superalloy, high specific gravity alloy, ceramic material, magnetic material, NdFeB, etc. The saturated vapor pressure of various metal oxides in vacuum is very low, which can promote the decomposition and removal of oxides, so the surface brightness of the treated parts is high. At the same time, the metal has strong activity and can activate sintering. At present, in order to improve production efficiency and save energy, the tempering furnace in the continuous heat treatment production line often adopts the method of tempering multiple layers of furnace charge at the same time. Therefore, the furnace door structure needs to be able to cooperate to achieve the effect of layered discharge of furnace charge. The relevant furnace door structures include flip type, sliding type and folding type.

[0003] In the prior art, the furnace door structure of the tempering furnace is relatively simple, and is usually only locked between the furnace door and the box body by a rotating pin and a clamping frame. The locking method is not tight enough. When the furnace door is hit by an external force, the rotating pin is easily broken and the furnace door is opened. The high temperature in the box body will radiate to the working environment, causing danger. When the tempering furnace is working, the interior is sometimes in a high-pressure state. In the high-pressure state, the furnace door will tend to move away from the furnace body due to pressure, and then the furnace door will squeeze the locking mechanism, making the rotating pin and the clamping frame easily damaged or loose, thereby affecting the sealing effect of the furnace door.

[0004] Therefore, we propose a sealed furnace door structure for a horizontal tempering furnace to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to drive the cross plate, the connecting block and the furnace door to move vertically through the lifting plate, so that the furnace door can be moved to the top of the furnace body, thereby making the front end of the furnace body empty, facilitating the entry and exit of materials and improving work efficiency. The hydraulic cylinder can smoothly drive the furnace door to move horizontally through the L-shaped connecting plate, so that the furnace door seals the front end of the furnace body and can support the furnace door after sealing. At the same time, the abutment plate of the abutment mechanism further supports the furnace door during sealing, avoiding outward movement of the furnace door during sealing, improving the sealing effect of the furnace door, and being able to share the pressure on the furnace door, reducing the force on the single L-shaped connecting plate and the abutment plate, and improving the service life of the equipment. It solves the problems of poor sealing effect of the existing furnace door and easy damage to the locking mechanism due to pressure when the furnace body is in a high-pressure state. A sealed furnace door structure for a horizontal tempering furnace is proposed.

[0006] The object of the present invention can be achieved by the following technical scheme: comprising a furnace body, a double-axis motor is arranged at the front end of the upper surface of the furnace body, a furnace door is arranged at the front of the furnace body, a connecting groove is opened in the middle of the front of the furnace door, and a horizontal sealing mechanism is arranged at the front end of the furnace door;

[0007] The horizontal sealing mechanism includes a hydraulic cylinder, and four hydraulic cylinders are provided. The front ends of the four hydraulic cylinders are hinged with L-shaped connecting plates through hinge shafts. The rear ends of the four L-shaped connecting plates are fixedly connected to the four corners of the front of the furnace door. A tooth plate is provided on one side of the L-shaped connecting plate close to the connecting groove, and abutment mechanisms are provided on the side walls of the tooth plate.

[0008] The abutment mechanism includes a fixed block, and two groups of fixed blocks are symmetrically arranged on the left and right. A rotating rod is rotatably installed inside the two groups of fixed blocks. The circumferential surfaces of the upper and lower ends of the rotating rod are provided with second driven gears. The four tooth plates are respectively meshed and connected with the four second driven gears. The circumferential surfaces of the upper and lower sides of the rotating rod are provided with abutment plates, and one end of the abutment plate abuts against the front side of the furnace door.

[0009] Preferably, the outer walls on both sides of the left and right sides of the furnace body are provided with fixed seats and support plates, and there are four fixed seats and support plates, and the rear ends of the four hydraulic cylinders are rotatably installed inside the four fixed seats, and the lower ends of the four hydraulic cylinders are respectively abutted against the top of the four support plates.

[0010] Preferably, a sealing ring is provided on the rear surface of the furnace door, and three groups of sealing rings are provided, and the furnace door is sealed and connected to the opening on the front side of the furnace body through the sealing ring.

[0011] Preferably, a lifting rod is movably installed inside the rotating rod, and an annular block and a spring are respectively provided on the circumferential surface in the middle of the lifting rod, the upper end of the spring is connected to the lower surface of the annular block, and the lower end of the spring is connected to the inside of the rotating rod, and a movable groove is opened inside the rotating rod, and the annular block and the spring are both arranged inside the movable groove.

[0012] Preferably, a lifting mechanism is provided on the rear side of the fixed block, and the lifting mechanism includes a mounting seat, and two groups of mounting seats are symmetrically provided. The interiors of the two groups of mounting seats are movably connected to the lifting plates through movable plates, and the rear side of the lifting plates is meshed with a first driven gear through gear teeth, and the rear end of the first driven gear is meshed with a driving gear, and a cross plate is provided at the lower end between the two lifting plates, and a connecting block is provided in the middle of the rear surface of the cross plate.

[0013] Preferably, an L-shaped plug rod is provided at the upper end of the front side of the lifting plate, and a cross plug block is provided at the lower end of the L-shaped plug rod and the lower end of the lifting rod. The upper cross plug block is inserted into the interior of the second driven gear at the upper end, and the lower cross plug block is inserted into the interior of the L-shaped connecting plate at the lower end. The L-shaped connecting plate, the second driven gear and the lower end of the rotating rod are all provided with a cross groove matching the cross plug block.

[0014] Preferably, a rotating shaft is provided inside the driving gear, and the rotating shaft is transmission-connected to the power output end of the dual-axis motor through a coupling, and fixed plates are provided at both left and right ends of the upper surface of the furnace body, the first driven gear is rotatably mounted on the fixed plate, and the end of the rotating shaft away from the dual-axis motor is rotatably mounted on the fixed plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The L-shaped connecting plate and the furnace door are driven to move backward by the hydraulic cylinder, so that when the furnace door seals the front end of the furnace body, the L-shaped connecting plate moves through the tooth plate to drive the second driven gear and the rotating rod to rotate, so that the abutment plate abuts and supports the furnace door, so that when the furnace door seals the furnace body, the L-shaped connecting plate and the abutment plate can simultaneously limit and support the furnace door, and at the same time can share the force exerted on the furnace door, thereby preventing the furnace door from moving outward, improving the sealing effect of the furnace door, reducing the damage exerted on the L-shaped connecting plate and the abutment plate, and prolonging the service life of the L-shaped connecting plate and the abutment plate;

[0017] (2) The lifting plate drives the L-shaped plug rod and the cross plug block to move upward, so that the upper and lower groups of cross plug blocks lose their limiting effect on the rotating rod and the L-shaped connecting plate. Then, after the furnace door is plugged into the connecting block, the lifting plate continues to move upward, which can drive the furnace door to move to the top of the furnace body. At the same time, the abutment plate rotates to the front of the furnace body, so that the inlet and outlet at the front end of the furnace body is vacant, which is convenient for loading and unloading materials and has higher work efficiency.

[0018] (3) By setting up the lifting mechanism, horizontal sealing mechanism and abutment mechanism, the furnace door can be automatically sealed or moved to the top of the furnace body, without the need for manual opening and closing of the furnace door, thus avoiding the high temperature at the furnace door and the danger of burns when manually opening and closing the furnace door. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the horizontal sealing mechanism of the present invention;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the abutment mechanism of the present invention;

[0025] Figure 6 For the present invention Figure 5 A magnified view of the structure at center.

[0026] In the figure: 1. furnace body; 2. double-axis motor; 3. furnace door; 4. connecting groove; 5. lifting mechanism; 501. mounting seat; 502. movable plate; 503. lifting plate; 504. first driven gear; 505. driving gear; 506. rotating shaft; 507. fixed plate; 508. horizontal plate; 509. connecting block; 510. L-shaped plug rod; 511. cross plug block; 6. horizontal sealing mechanism; 601. hydraulic cylinder; 602. L-shaped connecting plate; 603. sealing ring; 604. tooth plate; 605. fixing seat; 606. supporting plate; 7. abutting mechanism; 701. fixing block; 702. rotating rod; 703. second driven gear; 704. lifting rod; 705. abutting plate; 706. movable groove; 707. annular block; 708. spring; 8. cross groove. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] See also Figure 1 - Figure 6As shown, a sealed furnace door structure for a horizontal tempering furnace comprises a furnace body 1, a double-axis motor 2 is arranged at the front end of the upper surface of the furnace body 1, a furnace door 3 is arranged at the front of the furnace body 1, a connecting groove 4 is opened in the middle of the front of the furnace door 3, and a horizontal sealing mechanism 6 is arranged at the front end of the furnace door 3. The horizontal sealing mechanism 6 comprises a hydraulic cylinder 601, and four hydraulic cylinders 601 are arranged. The front ends of the four hydraulic cylinders 601 are hinged with L-shaped connecting plates 602 through hinge shafts, and the rear ends of the four L-shaped connecting plates 602 are fixedly connected to the four corners of the front of the furnace door 3. A tooth plate 604 is arranged on one side of the L-shaped connecting plate 602 close to the connecting groove 4. The furnace door 3 can be quickly and accurately moved to the front end of the furnace body 1 through the horizontal sealing mechanism 6 to seal the opening at the front end of the furnace body 1, thereby facilitating the subsequent work of the furnace body 1, and the furnace door 3 can also be smoothly moved out from the front end of the furnace body 1 to facilitate the entry and exit of materials inside the furnace body 1. , the side wall of the tooth plate 604 is provided with an abutment mechanism 7, the abutment mechanism 7 includes a fixed block 701, and the fixed block 701 is symmetrically arranged with two groups, the interiors of the two groups of fixed blocks 701 are rotatably installed with a rotating rod 702, the circumferential surfaces of the upper and lower ends of the rotating rod 702 are provided with a second driven gear 703, the four tooth plates 604 are respectively meshed and connected with the four second driven gears 703, and the circumferential surfaces of the upper and lower sides of the rotating rod 702 are provided with abutment plates 705, one end of the abutment plate 705 abuts against the front face of the furnace door 3. Through the setting of the abutment mechanism 7, when the furnace door 3 seals the front end of the furnace body 1, the abutment mechanism 7 can apply a supporting force to the furnace door 3, and can share the supporting force of the front end of the hydraulic cylinder 601, so that the furnace door 3 can more stably close the feed port at the front end of the furnace body 1, and avoid the high pressure suddenly generated when the furnace body 1 is working to push the furnace door 3 out of the furnace body 1, thereby improving the sealing effect of the furnace door 3;

[0030] It should be noted that when the four hydraulic cylinders 601 drive the furnace door 3 to move forward, the left tooth plate 604 drives the left second driven gear 703 and the rotating rod 702 to rotate clockwise, and the right tooth plate 604 drives the right second driven gear 703 and the rotating rod 702 to rotate counterclockwise, so that the rotating rod 702 can drive the abutment plate 705 to rotate to a state perpendicular to the dual-axis motor 2. At the same time, the furnace door 3 is also moved out of the furnace body 1 as a whole, which facilitates the subsequent movement of the furnace door 3. The two sets of fixing blocks 701 are respectively fixedly installed on the front sides of the two mounting seats 501, so that the fixing blocks 701 can install the rotating rod 702 at the front end of the mounting seat 501, providing rotation space for the rotating rod 702 and the second driven gear 703.

[0031] Embodiment 2:

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the left and right outer walls of the furnace body 1 are provided with fixed seats 605 and support plates 606, and there are four fixed seats 605 and support plates 606. The rear ends of the four hydraulic cylinders 601 are rotatably installed in the four fixed seats 605, and the lower ends of the four hydraulic cylinders 601 are respectively abutted against the tops of the four support plates 606. The rear surface of the furnace door 3 is provided with a sealing ring 603, and there are three groups of sealing rings 603. The furnace door 3 is sealed and connected to the opening of the front side of the furnace body 1 through the sealing ring 603. The arrangement of the three groups of sealing rings 603 can seal the connection between the furnace door 3 and the furnace body 1. At the same time, the three groups of sealing rings 603 form a maze passage, so that the sealing effect of the connection between the furnace door 3 and the furnace body 1 is better, and at the same time, it avoids the problem of gas leakage inside the furnace body 1 when one of the sealing rings 603 is damaged, thereby improving the sealing effect of the furnace door 3. 02 is movably installed with a lifting rod 704, and the circumferential surface in the middle of the lifting rod 704 is respectively provided with an annular block 707 and a spring 708, the upper end of the spring 708 is connected to the lower surface of the annular block 707, and the lower end of the spring 708 is connected to the inside of the rotating rod 702, and a movable groove 706 is opened inside the rotating rod 702, and the annular block 707 and the spring 708 are both arranged inside the movable groove 706. The setting of the movable groove 706 provides a movable space for the annular block 707 and the spring 708. When the annular block 707 is subjected to the downward force of the lifting rod 704, the annular block 707 smoothly moves downward vertically, thereby squeezing the spring 708, and then when the lifting rod 704 is not affected by other forces, the elastic force of the spring 708 is released, and the annular block 707 is pushed back to the initial position, so that the annular block 707 brings the lifting rod 704 back to the initial position;

[0033] It should be noted that the hydraulic cylinder 601 is in Figure 3 In the state shown, the front end of the hydraulic cylinder 601 is placed on the upper surface of the support plate 606, so that the support plate 606 supports the hydraulic cylinder 601, improves the stability of the hydraulic cylinder 601, and enables the hydraulic cylinder 601 to stably move the furnace door 3 horizontally. The sealing ring 603 here is a metal rubber sealing ring, which is made of stainless steel wire and does not contain any rubber components. It has strong use characteristics and can maintain normal operation in high vacuum, high and low temperature, strong radiation and various corrosion environments. The surface of the sealing ring 603 is made of different materials such as stainless steel, copper, polytetrafluoroethylene and other materials according to different uses. The coated metal rubber component is used as a lining core, which has the advantages of high sealing strength, good effect, and reusability. The lining core of the sealing ring 603 is a component made of different metal wire diameters and densities, which is suitable for different pressure occasions. The general use range is -80 to 800°C, so that the high temperature inside the tempering furnace will not cause greater damage to the sealing ring 603, and there is no need to frequently replace the sealing ring 603, thereby improving the service life of the sealing ring 603.

[0034] Embodiment 3:

[0035] Please refer to Figure 1 , Figure 2 ,and Figure 4 As shown, a lifting mechanism 5 is arranged at the rear side of the fixed block 701, and the lifting mechanism 5 includes a mounting seat 501, and two groups of mounting seats 501 are symmetrically arranged on the left and right sides. The interiors of the two groups of mounting seats 501 are movably connected with a lifting plate 503 through a movable plate 502. The movable plate 502 is arranged so that the lifting plate 503 is installed inside the mounting seat 501 through the movable plate 502, and can also be stably moved vertically inside the mounting seat 501 through the movable plate 502. The rear side of the lifting plate 503 is meshed with a first driven gear 504 through gear teeth, and the rear end of the first driven gear 504 is meshed with a driving gear 505. A horizontal plate 508 is arranged at the lower end between the two lifting plates 503, and the rear surface of the horizontal plate 508 A connecting block 509 is provided in the middle of the surface. Through the setting of the lifting mechanism 5, the furnace door 3 can be smoothly moved vertically upward, so that the front end of the furnace body 1 is vacated, which is convenient for feeding materials into the furnace body 1 or taking out materials from the furnace body 1. An L-shaped plug rod 510 is provided at the upper end of the front of the lifting plate 503, and a cross plug block 511 is provided at the lower end of the L-shaped plug rod 510 and the lower end of the lifting rod 704. The upper cross plug block 511 is plugged into the interior of the upper second driven gear 703, and the lower cross plug block 511 is plugged into the interior of the lower L-shaped connecting plate 602. The L-shaped connecting plate 602, the second driven gear 703 and the lower end of the rotating rod 702 are all provided with a cross groove 8 matching the cross plug block 511.

[0036] It should be noted that the two sets of mounting seats 501 are respectively arranged at the left and right ends of the front of the furnace body 1, and the interior of the mounting seats 501 is provided with a movable groove that can provide the lifting plate 503 and the rear side wall gears for vertical movement, so that the movable lifting plate 503 can smoothly move vertically inside the mounting seats 501. Figure 1In the embodiment, when the furnace door 3 is sealed and plugged into the front end of the furnace body 1, the cross plate 508 and the connecting block 509 are located at the lower end of the connecting groove 4 at the front end of the furnace door 3, and the cross plug block 511 at the lower end of the L-shaped plug rod 510 is plugged into the cross groove 8 in the middle of the second driven gear 703 at the upper end, and the upper end L-shaped connecting plate 602 is provided with a cross through groove, and the middle diameter of the cross groove 8 is larger than the diameter of the L-shaped plug rod 510, so that the L-shaped plug rod 510 and the cross plug block 511 thereon can be smoothly connected to the upper end L-shaped connecting plate 602. The connecting plate 602 moves vertically inside, and the cross plug block 511 at the lower end of the lifting rod 704 is inserted into the cross groove 8 at the upper end of the lower L-shaped connecting plate 602. At this time, the rotating rod 702 can be locked and cannot rotate, so that the abutment plate 705 can exert a supporting force on the furnace door 3, and then smoothly share the reaction force of the furnace door 3 exerted on the hydraulic cylinder 601 and the L-shaped connecting plate 602, so that the sealing effect of the furnace door 3 is better, and at the same time, the service life of the hydraulic cylinder 601, the L-shaped connecting plate 602 and the abutment plate 705 is improved.

[0037] A rotating shaft 506 is arranged inside the driving gear 505, and the rotating shaft 506 is transmission-connected with the power output end of the dual-axis motor 2 through a coupling, so that when the dual-axis motor 2 is working, it can smoothly drive the two rotating shafts 506 and the two driving gears 505 to rotate. Fixed plates 507 are arranged at both left and right ends of the upper surface of the furnace body 1, and the first driven gear 504 is rotatably mounted on the fixed plate 507, and one end of the rotating shaft 506 away from the dual-axis motor 2 is rotatably mounted on the fixed plate 507. The setting of the fixed plate 507 can limit the rotating shaft 506 and the first driven gear 504 without affecting the rotation of the rotating shaft 506 and the first driven gear 504, so that the rotating shaft 506 and the first driven gear 504 can smoothly rotate, and then smoothly drive the lifting plate 503 to move vertically;

[0038] It should be noted that when the dual-axis motor 2 is working, the two rotating shafts 506 and the two driving gears 505 driven by it have the same rotation direction. The rotation of the two driving gears 505 respectively drives the two first driven gears 504 to rotate in the same direction, so that the two lifting plates 503 can move vertically upward or vertically downward at the same time, and then smoothly drive the cross plate 508, the connecting block 509, the L-shaped plug rod 510 and the cross plug block 511 to move vertically upward or vertically downward.

[0039] When the present invention is in use, firstly start the dual-axis motor 2, the dual-axis motor 2 drives the two rotating shafts 506 and the two driving gears 505 to rotate, so that the two driving gears 505 respectively drive the two first driven gears 504 to rotate, and then drive the two lifting plates 503 to move vertically upward, the two lifting plates 503 drive the two groups of L-shaped plug rods 510 and the cross plug blocks 511 on the L-shaped plug rods 510 to move vertically upward, and at the same time drive the cross plate 508 and the connecting block 509 to move vertically upward, when the connecting block 509 moves vertically upward to completely horizontally dock with the connecting groove 4, the dual-axis motor 2 is temporarily turned off, at this time the cross plug blocks 511 on the L-shaped plug rods 510 The insert block 511 not only moves out from the inside of the upper second driven gear 703, but also moves to the top of the upper L-shaped connecting plate 602. Then, when the upper end of the lifting rod 704 is no longer abutted by the upper cross insert block 511, the elastic force of the spring 708 is released, and the spring 708 pushes the annular block 707 and the lifting rod 704 upward, so that the lifting rod 704 moves upward, thereby driving the cross insert block 511 at its lower end to move out of the lower L-shaped connecting plate 602. At this time, the rotating rod 702 loses its locking effect, and the abutting plate 705 loses its abutting and limiting effect on the furnace door 3, and the rotating rod 702 and the abutting plate 705 can rotate.

[0040] Then, the four hydraulic cylinders 601 are started, and the four hydraulic cylinders 601 drive the four L-shaped connecting plates 602 to move forward horizontally, and the four L-shaped connecting plates 602 drive the furnace door 3 and the four tooth plates 604 to move forward horizontally. During the process of the furnace door 3 and the tooth plates 604 moving forward horizontally, the four tooth plates 604 first mesh with the second driven gear 703, driving the second driven gear 703 to rotate, so that the second driven gear 703 drives the rotating rod 702 to rotate, and then the rotating rod 702 rotates to drive the abutment plate 705 to rotate outward, and then the operation of the hydraulic cylinder 601 is suspended when the connecting block 509 is inserted into the connecting groove 4 at the front end of the furnace door 3. At this time, the abutment plate 705 rotates to a position that is perpendicular to the rotating shaft 506;

[0041] Then, the double-axis motor 2 and the hydraulic cylinder 601 are started again. When the double-axis motor 2 drives the lifting plate 503, the horizontal plate 508, the connecting block 509 and the furnace door 3 to move vertically upward, the hydraulic cylinder 601 will rotate upward slightly through the L-shaped connecting plate 602. However, the hydraulic cylinder 601 is extended simultaneously, so that the hydraulic cylinder 601 is gradually stretched during the rising process of the L-shaped connecting plate 602, so that the furnace door 3 and the L-shaped connecting plate 602 can move vertically upward smoothly. When the furnace door 3 moves to the top of the furnace body 1, the furnace door 3 is opened, so that it is convenient for the staff to deliver materials into the furnace body 1 or take out the materials that have been burned in the furnace body 1.

[0042] After the materials inside the furnace body 1 are taken out and new materials are placed, the double-axis motor 2 is started in reverse, so that the double-axis motor 2 drives the lifting plate 503 and the furnace door 3 to move vertically downward to the front end opening of the furnace body 1, and stops moving downward when the hydraulic cylinder 601 is in a horizontal state. At this time, the hydraulic cylinder 601 drives the furnace door 3 to move backward, so that the furnace door 3 is inserted into the interior of the furnace body 1 to seal the front end of the furnace body 1, and at the same time, the L-shaped connecting plate 602 moves backward to drive the tooth plate 604 to move backward, and then the tooth plate 604 drives the second driven gear 703 and the rotating rod 702 to rotate, and the rotation of the rotating rod 702 drives the abutment plate 705 to rotate. When the furnace door 3 is inserted into the front end of the furnace body 1, the abutment plate 705 abuts against the front end of the furnace door 3, and then the double-axis motor is started again. 2, so that the lifting plate 503 continues to move downward, driving the L-shaped plug rod 510 and the cross plug block 511 at its upper end to move downward, the L-shaped plug rod 510 and the cross plug block 511 are first inserted into the cross groove 8 of the upper L-shaped connecting plate 602, and then inserted into the cross groove 8 of the second driven gear 703 at the upper end, while limiting and fixing the upper L-shaped connecting plate 602 and the upper second driven gear 703, the lifting rod 704 is squeezed downward, so that the lifting rod 704 drives the cross plug block 511 at its lower end to move downward and insert it into the cross groove 8 of the lower L-shaped connecting plate 602, and the lower L-shaped connecting plate 602 is limited and fixed, so that the abutment plate 705 can abut and support the furnace door 3, thereby improving the sealing effect of the furnace door 3.

[0043] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sealed furnace door structure for a horizontal tempering furnace, comprising a furnace body (1), a double-axis motor (2) is arranged at the front end of the upper surface of the furnace body (1), a furnace door (3) is arranged at the front of the furnace body (1), and a connecting groove (4) is opened in the middle of the front of the furnace door (3), characterized in that: A horizontal sealing mechanism (6) is provided at the front end of the furnace door (3); The horizontal sealing mechanism (6) comprises a hydraulic cylinder (601), and four hydraulic cylinders (601) are provided, the front ends of the four hydraulic cylinders (601) are hinged with L-shaped connecting plates (602) through hinge shafts, the rear ends of the four L-shaped connecting plates (602) are fixedly connected to the four corners of the front face of the furnace door (3), and a tooth plate (604) is provided on one side of the L-shaped connecting plate (602) close to the connecting groove (4), and a side wall of the tooth plate (604) is provided with an abutment mechanism (7); The abutment mechanism (7) comprises a fixed block (701), and the fixed block (701) is symmetrically arranged in two groups, and a rotating rod (702) is rotatably installed inside the two groups of fixed blocks (701), and the circumferential surfaces of the upper and lower ends of the rotating rod (702) are provided with a second driven gear (703), and the four tooth plates (604) are respectively meshed and connected with the four second driven gears (703), and the circumferential surfaces of the upper and lower sides of the rotating rod (702) are provided with an abutment plate (705), and one end of the abutment plate (705) abuts against the front surface of the furnace door (3); The hydraulic cylinder (601) drives the L-shaped connecting plate (602) and the furnace door (3) to move backward, so that the furnace door (3) seals the front end of the furnace body (1). At the same time, the L-shaped connecting plate (602) moves through the tooth plate (604) to drive the second driven gear (703) and the rotating rod (702) to rotate, so that the abutting plate (705) abuts against and supports the furnace door (3); The outer walls on both sides of the furnace body (1) are provided with a fixed seat (605) and a support plate (606), and there are four fixed seats (605) and four support plates (606). The rear ends of the four hydraulic cylinders (601) are rotatably mounted inside the four fixed seats (605), and the lower ends of the four hydraulic cylinders (601) are respectively abutted against the tops of the four support plates (606); A lifting rod (704) is movably installed inside the rotating rod (702), and an annular block (707) and a spring (708) are respectively arranged on the circumferential surface in the middle of the lifting rod (704), the upper end of the spring (708) is connected to the lower surface of the annular block (707), and the lower end of the spring (708) is connected to the inside of the rotating rod (702), and a movable groove (706) is opened inside the rotating rod (702), and the annular block (707) and the spring (708) are both arranged inside the movable groove (706); A lifting mechanism (5) is arranged at the rear side of the fixed block (701), and the lifting mechanism (5) comprises a mounting seat (501), and two groups of the mounting seats (501) are symmetrically arranged on the left and right sides, and the interiors of the two groups of mounting seats (501) are movably connected to a lifting plate (503) through a movable plate (502), and the rear side of the lifting plate (503) is meshedly connected to a first driven gear (504) through gear teeth, and the rear end of the first driven gear (504) is meshedly connected to a driving gear (505), and a horizontal plate (508) is arranged at the lower end between the two lifting plates (503), and a connecting block (509) is arranged in the middle of the rear surface of the horizontal plate (508); An L-shaped plug rod (510) is provided at the upper end of the front face of the lifting plate (503), and a cross plug block (511) is provided at the lower end of the L-shaped plug rod (510) and the lower end of the lifting rod (704). The upper cross plug block (511) is plugged into the interior of the second driven gear (703) at the upper end, and the lower cross plug block (511) is plugged into the interior of the L-shaped connecting plate (602) at the lower end. The interiors of the L-shaped connecting plate (602), the second driven gear (703) and the lower end of the rotating rod (702) are all provided with a cross slot (8) matching the cross plug block (511); A rotating shaft (506) is arranged inside the driving gear (505), and the rotating shaft (506) is transmission-connected to the power output end of the dual-axis motor (2) through a coupling; fixed plates (507) are arranged at both left and right ends of the upper surface of the furnace body (1); the first driven gear (504) is rotatably mounted on the fixed plate (507); and one end of the rotating shaft (506) away from the dual-axis motor (2) is rotatably mounted on the fixed plate (507); The two lifting plates (503) drive the two groups of L-shaped plug rods (510) and the cross plug block (511) on the L-shaped plug rod (510) to move vertically upward, and at the same time drive the cross plate (508) and the connecting block (509) to move vertically upward. When the connecting block (509) moves vertically upward to completely horizontally dock with the connecting groove (4), the double-axis motor (2) is turned off. At this time, the cross plug block (511) on the L-shaped plug rod (510) not only moves from the upper second driven gear (703) ) and at the same time moves to the top of the upper L-shaped connecting plate (602). Then, when the upper end of the lifting rod (704) is no longer abutted by the upper cross plug block (511), the elastic force of the spring (708) is released, and the spring (708) pushes the annular block (707) and the lifting rod (704) upward, so that the lifting rod (704) moves upward, thereby driving the cross plug block (511) at its lower end to move out of the interior of the lower L-shaped connecting plate (602).

2. A sealed furnace door structure for a horizontal tempering furnace according to claim 1, characterized in that: The rear surface of the furnace door (3) is provided with a sealing ring (603), and three groups of sealing rings (603) are provided. The furnace door (3) is sealed and connected to the opening on the front side of the furnace body (1) through the sealing ring (603).

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