CN216954053U

CN216954053U - Automatic furnace door pressing device of industrial furnace

Info

Publication number: CN216954053U
Application number: CN202123303394.2U
Authority: CN
Inventors: 董安伟; 陆维佳; 陈浩
Original assignee: Suzhou Huike Equipment Co Ltd
Current assignee: Suzhou Huike Technology Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-07-12
Anticipated expiration: 2031-12-24

Abstract

An automatic furnace door pressing device of an industrial furnace belongs to the technical field of furnaces. The industrial kiln comprises a kiln body, wherein a kiln body top frame is arranged at the top of the kiln body; the automatic furnace door pressing device comprises a left automatic furnace door closing mechanism and a right automatic furnace door closing mechanism, the left automatic furnace door closing mechanism is used for applying pressing force to one side, back to the furnace cavity, of the furnace door to enable the furnace door to be closely matched with the open position of the furnace cavity when the furnace door is in a closed state, the left automatic furnace door closing mechanism is arranged on the left side wall of the furnace opening of the furnace body and matched with or disengaged from the left edge part of one side, back to the furnace cavity, of the furnace door, and the right automatic furnace door closing mechanism is arranged on the right side wall of the furnace opening of the furnace body and matched with or disengaged from the right edge part of one side, back to the furnace cavity, of the furnace door. The external air can be prevented from entering the hearth, the energy consumption is saved, and the sintering quality of products in the hearth is guaranteed; the structure is simple, the manufacture and the use are convenient, and good economic and cheap effects are reflected.

Description

Automatic furnace door pressing device of industrial furnace

Technical Field

The utility model belongs to the technical field of kilns, and particularly relates to an automatic furnace door pressing device of an industrial kiln.

Background

The industrial kilns mentioned above are mainly referred to as box-type furnaces, but are not absolutely limited to box-type furnaces, and as for box-type furnaces, they are classified according to their characteristics: box resistance furnaces, crucible furnaces, muffle furnaces, and the like; the heating elements are distinguished as follows: resistance wire muffle furnaces, silicon carbide rod box furnaces, silicon molybdenum rod box furnaces, and the like. The box furnace is named as a box furnace in the industry because the box furnace is similar to a box body in appearance. Such furnaces are widely used in the production of electronic products such as ceramic capacitor piezoelectric transducers, ceramic filters, ceramic thermistor components, etc., but are not limited to such electronic products that are typically fed into the furnace for sintering after being compounded, mixed and pressed into sheets. It is common to equip box furnaces with doors for charging, discharging, cleaning and maintenance of the furnace chambers. In addition, according to the common general knowledge, in the product sintering state, the door of the box furnace is closed, and the requirement for tight closure or sealing is severe.

Technical information related to the pressing of the oven door of the industrial kiln can be seen in published Chinese patent documents, and typically, for example, CN212227736U discloses a locking device for the oven door of the industrial kiln, which can embody a good pressing (tightening) effect on the closed oven door to a certain extent, but has a high space criticality due to a relatively large volume. If the manual operation mode used by many manufacturers at an early stage or even at present is used instead of an automatic furnace door pressing device, on one hand, the operation intensity of an operator is high, and on the other hand, if the pressing requirement on the furnace door cannot be met, the sintering quality of the product is directly influenced or even the product is scrapped because the external air enters a hearth to oxidize the product, and the adverse factor of increasing the energy consumption is generated because of the poor sealing problem. The foregoing needs are met by the discovery and appropriate improvements that will be made in the context of the following descriptions.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatic furnace door pressing device of an industrial furnace, which is beneficial to automatically pressing a closed furnace door to ensure that a good sealing effect is embodied between the furnace door and a hearth opening part, is beneficial to simplifying the structure, is convenient to manufacture and use and is low in cost.

The task of the utility model is achieved by the automatic furnace door pressing device of the industrial furnace, the industrial furnace comprises a furnace body which is arranged on a bottom frame and forms a furnace chamber, and the top of the furnace body is provided with a furnace body top frame; the automatic furnace door pressing device comprises a left automatic furnace door closing mechanism and a right automatic furnace door closing mechanism, the left automatic furnace door closing mechanism is used for applying pressing force to one side, back to the furnace cavity, of the furnace door to enable the furnace door to be closely matched with the open position of the furnace cavity when the furnace door is in a closed state, the left automatic furnace door closing mechanism is arranged on the left side wall of the furnace opening of the furnace body in a state of being connected with the left end of the furnace body top frame and matched with or disengaged from the left edge position, back to the furnace cavity, of the furnace door, and the right automatic furnace door closing mechanism is arranged on the right side wall of the furnace opening of the furnace body in a state of being connected with the right end of the furnace body top frame and matched with or disengaged from the right edge position, back to the furnace cavity, of the furnace door.

In a specific embodiment of the utility model, a left edge of the door facing a side of the furnace corresponds to a front side of a left wall of the furnace, and a right edge of the door facing a side of the furnace corresponds to a front side of a right wall of the furnace; a furnace mouth left side wall slide rail is formed at the position corresponding to the right side of the furnace mouth left side wall, the upper end of the furnace mouth left side wall slide rail extends upwards, a furnace mouth left side wall slide rail groove is formed at the left side of the height direction of the furnace mouth left side wall slide rail, a furnace mouth right side wall slide rail is formed at the position corresponding to the left side of the furnace mouth right side wall, the upper end of the furnace mouth right side wall slide rail extends upwards, and a furnace mouth right side wall slide rail groove is formed at the left side of the height direction of the furnace mouth right side wall slide rail; a furnace door left side surface limiting roller seat is respectively fixed on the left side surface of the furnace door and is respectively positioned at the upper part and the lower part of the left side surface, a furnace door up-down left limiting roller is rotatably arranged on the furnace door left side surface limiting roller seat, the furnace door up-down left limiting roller and the furnace opening left side wall slide rail groove form a rolling pair, a furnace door right side surface limiting roller seat is respectively fixed on the right side surface of the furnace door and is respectively positioned at the upper part and the lower part of the right side surface, a furnace door up-down right limiting roller is rotatably arranged on the furnace door right side surface limiting roller seat, and the furnace door up-down right limiting roller and the furnace opening right side wall slide rail groove form a rolling pair; the left end of the furnace body top frame corresponds to the upper part of the left side wall of the furnace opening and is fixedly provided with a left bracket of the furnace body top frame, and the right end of the furnace body top frame corresponds to the upper part of the right side wall of the furnace opening and is fixedly provided with a right bracket of the furnace body top frame; a furnace door left upper pressing door roller baffle is fixed at the upper part of the left edge part of one side of the furnace door back to the hearth, and a furnace door left lower pressing door roller baffle is fixed at the lower part of the furnace door and at the position corresponding to the lower part of the furnace door left upper pressing door roller baffle; a furnace door upper right pressing door roller baffle is fixed at the upper part of the right edge part of the furnace door back to one side of the hearth, and a furnace door lower right pressing door roller baffle is fixed at the lower part of the furnace door and at the position corresponding to the lower part of the furnace door upper right pressing door roller baffle; the furnace door left automatic fastening mechanism is matched with or disengaged from the rear side surfaces of the furnace door left upper pressing door roller baffle and the furnace door left lower pressing door roller baffle at the same time, and the furnace door right automatic fastening mechanism is matched with or disengaged from the rear side surfaces of the furnace door right upper pressing door roller baffle and the furnace door right lower pressing door roller baffle at the same time in a state of synchronous action with the furnace door left automatic fastening mechanism.

In another specific embodiment of the present invention, the left automatic door closer mechanism includes a left lifting link driving cylinder, a left lifting link, a left upper door-pressing roller baffle actuating device and a left lower door-pressing roller baffle actuating device, the left lifting link driving cylinder is connected with a left lifting link driving cylinder base in a state that a left lifting link driving cylinder column thereof faces downward, the left lifting link driving cylinder base is fixed with the left end of the furnace body top frame, the left upper door-pressing roller baffle actuating device and the left lower door-pressing roller baffle actuating device are disposed at the front side of the left side wall of the furnace opening in a state of vertically corresponding to each other, and the right end of the left upper door-pressing roller baffle actuating device crosses the left side wall slide rail of the furnace opening rightward and engages or disengages with the rear side surface of the left upper door-pressing roller baffle of the furnace door, and the right end of the left lower door-pressing roller baffle actuating device crosses the left side wall slide rail of the furnace opening rightward and the left side wall slide rail of the furnace opening and the furnace door rightward The rear side surfaces of the lower pressing door roller baffle plates are matched or not matched, the upper end of the left lifting connecting rod is hinged with the left lifting connecting rod driving action cylinder column, the left upper pressing door roller baffle plate action device is connected with the middle part of the left lifting connecting rod, and the left lower pressing door roller baffle plate action device is connected with the lower end of the left lifting connecting rod.

In another embodiment of the present invention, the door roller baffle device comprises a left lifting link middle connecting arm, a left lifting link middle connecting arm shaft, a door left upper pressing door roller baffle roller arm and a door left upper pressing door roller baffle roller, wherein the upper end of the left lifting link middle connecting arm is connected with the middle part of the left lifting link through a left lifting link middle connecting arm pin shaft, the lower end of the left lifting link middle connecting arm is formed with a left lifting link middle connecting arm shaft sleeve, the left lifting link middle connecting arm shaft sleeve is fixedly arranged at the middle part of the left lifting link middle connecting arm shaft, the left end and the right end of the left lifting link middle connecting arm shaft are rotatably supported on the left lifting link middle connecting arm shaft supporting seat, and the right end of the left lifting link middle connecting arm shaft passes over the furnace mouth left side wall slide rail rightwards, the furnace door left upper pressing door roller baffle acting roller is rotationally arranged on the furnace door left upper pressing door roller baffle acting roller arm, and the furnace door left upper pressing door roller baffle acting roller corresponds to the rear of the furnace door left upper pressing door roller baffle when the furnace door is in a state of closing the opening part of the furnace chamber; the left lower pressing door roller baffle acting device comprises a left lifting connecting rod lower connecting arm, a left lifting connecting rod lower connecting arm shaft, a furnace door left lower pressing door roller baffle acting roller arm and a furnace door left lower pressing door roller baffle acting roller, wherein the upper end of the left lifting connecting rod lower connecting arm is connected with the lower part of the left lifting connecting rod through a left lifting connecting rod lower connecting arm pin shaft, the lower end of the left lifting connecting rod lower connecting arm is provided with a left lifting connecting rod lower connecting arm shaft sleeve, the left lifting connecting rod lower connecting arm shaft sleeve is fixedly sleeved in the middle of the left lifting connecting rod lower connecting arm shaft, the left end and the right end of the left lifting connecting rod lower connecting arm shaft are rotatably supported on a left lifting connecting rod lower connecting arm shaft supporting seat, the right end of the left lifting connecting rod lower connecting arm shaft passes over the furnace mouth left side wall slide rail rightwards, the left lifting connecting rod lower connecting arm shaft supporting seat is fixed with the front side surface of the furnace mouth left side wall, the position of the right side of the sliding rail of the left side wall of the furnace opening is fixed with the right end of the lower connecting arm shaft of the left lifting connecting rod, the left lower door pressing roller baffle acting roller of the furnace door is rotationally arranged on the left lower door pressing roller baffle acting roller arm of the furnace door, the furnace door is in a state of closing an opening part of the hearth, and the left lower door pressing roller baffle acting roller of the furnace door corresponds to the rear part of the left lower door pressing roller baffle of the furnace door.

In yet another specific embodiment of the present invention, the left lifting link driving cylinder is a cylinder.

In still another specific embodiment of the present invention, the oven door right automatic closing mechanism comprises a right lifting link driving acting cylinder, a right lifting link, a right upper door pressing roller baffle acting device and a right lower door pressing roller baffle acting device, the right lifting link driving acting cylinder is connected with a right lifting link driving acting cylinder base in a state that a right lifting link driving acting cylinder column faces downwards, the right lifting link driving acting cylinder base is fixed with the right end of the oven body top frame, the right upper door pressing roller baffle acting device and the right lower door pressing roller baffle acting device are arranged at the front side of the oven door right side wall in a state of corresponding up and down with each other, and the left end of the right upper door pressing roller baffle acting device crosses the oven door right side wall slide rail leftwards and is matched or unmatched with the rear side surface of the oven door right upper door pressing roller baffle, and the left end of the right lower door pressing roller baffle acting device crosses the oven door right side wall slide rail leftwards and is also matched with the oven door right side wall slide rail leftwards The rear side surface of the right lower pressing door roller baffle is matched or not matched, the upper end of the right lifting connecting rod is hinged with the right lifting connecting rod driving acting cylinder column, the right upper pressing door roller baffle acting device is connected with the middle part of the right lifting connecting rod, and the right lower pressing door roller baffle acting device is connected with the lower end of the right lifting connecting rod.

In a more specific embodiment of the present invention, the door pressing roller baffle acting device comprises a right lifting link middle connecting arm, a right lifting link middle connecting arm shaft, a door pressing roller baffle acting roller arm and a door pressing roller baffle acting roller, wherein the upper end of the right lifting link middle connecting arm is connected with the middle part of the right lifting link through a right lifting link middle connecting arm pin shaft, the lower end of the right lifting link middle connecting arm forms a right lifting link middle connecting arm shaft sleeve, the right lifting link middle connecting arm shaft sleeve is fixedly sleeved on the middle part of the right lifting link middle connecting arm shaft, the left end and the right end of the right lifting link middle connecting arm shaft are rotatably supported on the right lifting link middle connecting arm shaft, and the left end of the right lifting link middle connecting arm shaft leftwards crosses the furnace mouth right side wall slide rail, the furnace door right upper pressing door roller baffle acting roller is rotationally arranged on the furnace door right upper pressing door roller baffle acting roller arm, and the furnace door right upper pressing door roller baffle acting roller corresponds to the rear of the furnace door right upper pressing door roller baffle when the furnace door is in a state of closing the opening part of the furnace chamber; the right lower pressing door roller baffle acting device comprises a right lifting connecting rod lower connecting arm, a right lifting connecting rod lower connecting arm shaft, a furnace door right lower pressing door roller baffle acting roller arm and a furnace door right lower pressing door roller baffle acting roller, the upper end of the right lifting connecting rod lower connecting arm is connected with the lower part of the right lifting connecting rod through a right lifting connecting rod lower connecting arm pin shaft, the lower end of the right lifting connecting rod lower connecting arm is provided with a right lifting connecting rod lower connecting arm shaft sleeve, the right lifting connecting rod lower connecting arm shaft sleeve is fixedly sleeved in the middle of the right lifting connecting rod lower connecting arm shaft, the left end and the right end of the right lifting connecting rod lower connecting arm shaft are rotatably supported on a right lifting connecting rod lower connecting arm shaft supporting seat, the left end of the right lifting connecting rod lower connecting arm shaft passes over the furnace mouth right side wall slide rail leftwards, the right lifting connecting rod lower connecting arm supporting seat shaft is fixed with the front side surface of the furnace mouth right side wall, the roller arm is fixed at the left position of the sliding rail on the right side wall of the furnace opening and the left end of the connecting arm shaft at the lower part of the right lifting connecting rod, the roller is rotationally arranged on the roller arm under the action of the roller baffle on the right lower pressing door of the furnace opening, the furnace door is in a state of closing the opening part of the hearth, and the roller is corresponding to the roller baffle at the rear part of the roller baffle on the right lower pressing door of the furnace door.

In a further specific embodiment of the present invention, the right lifting link driving cylinder is a cylinder.

In a still more specific embodiment of the present invention, a set of oven door friction reducing rolling guides is provided on the chassis and spaced apart from the front side of the chassis, and the bottom surface of the oven door corresponds to the oven door friction reducing rolling guides.

One of the technical effects of the technical scheme provided by the utility model is that the furnace door can be automatically and tightly closed by the left and right automatic closing mechanisms to well seal the opening part of the furnace door and the furnace hearth in a closed state, so that outside air can be prevented from entering the furnace hearth, the energy consumption can be saved, and the sintering quality of products in the furnace hearth can be guaranteed; secondly, the structure of the left automatic closing mechanism and the right automatic closing mechanism of the furnace door is relatively simple, thereby not only being convenient to manufacture and use, but also showing good economic and cheap effects.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the right side view of fig. 1.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and back are in the present state of fig. 1 and in the present state of rest of fig. 1, and therefore should not be interpreted as a particular limitation to the technical solution provided by the present invention.

Referring to fig. 1 and 2, a furnace body 1 of an industrial furnace is shown, which is arranged on a bottom frame 11 and forms a furnace chamber 12, and the top of the furnace body 1 is provided with a furnace body top frame 13; there is shown an oven door 2 for opening or closing a firebox 12, which is provided at an open portion of the firebox 12. According to the state of the art, the aforementioned undercarriage 11 is supported on the ground in the use state; also shown is an automatic furnace door lifting mechanism 3 in the structural system of the industrial furnace, which is used for lifting the furnace door 2 upwards to open the furnace cavity 12 or lowering the furnace door 2 downwards to close the furnace cavity 12.

The structural system of the automatic furnace door pressing device is shown as a left furnace door automatic closing mechanism 4 and a right furnace door automatic closing mechanism 5 which are used for applying pressing force to one side of the furnace door 2 back to the furnace cavity 12 when the furnace door 2 is in a closed state so as to enable the furnace door 2 to be closely matched with an open part of the furnace cavity 12, wherein the left furnace door automatic closing mechanism 4 is arranged on a left furnace opening side wall 14 of the furnace body 1 in a state of being connected with the left end of the furnace body top frame 13 and matched with or disengaged from a left edge part of one side of the furnace door 2 back to the furnace cavity 12, and the right furnace door automatic closing mechanism 5 is arranged on a right furnace opening side wall 15 of the furnace body 1 in a state of being connected with the right end of the furnace body top frame 13 and matched with or disengaged from a right edge part of one side of the furnace door 2 back to the furnace cavity 12.

The furnace door automatic lifting mechanism 3 is arranged on a furnace body top frame 13 of the furnace body 1 and is connected with the furnace door 2 at a position corresponding to the upper part of the furnace door 2,

a left edge of the door 2 facing the oven cavity 12 corresponds to a left oven cavity wall front 1211 of the left oven cavity wall 121 of the oven cavity 12, and a right edge of the door 2 facing the oven cavity 12 corresponds to a right oven cavity wall front 1221 of the right oven cavity wall 122 of the oven cavity 12; a furnace mouth left side wall slide rail 141 is formed at a position corresponding to the right side of the furnace mouth left side wall 14, the upper end of the furnace mouth left side wall slide rail 141 extends upward and a furnace mouth left side wall slide rail groove 1411 is formed at the left side of the furnace mouth left side wall slide rail 141 in the height direction, a furnace mouth right side wall slide rail 151 is formed at a position corresponding to the left side of the furnace mouth right side wall 15, the upper end of the furnace mouth right side wall slide rail 151 extends upward and a furnace mouth right side wall slide rail groove 1511 is formed at the left side of the furnace mouth right side wall slide rail 151 in the height direction; a furnace door left side limiting roller seat 21 is respectively fixed on the left side surface of the furnace door 2 and respectively positioned at the upper part and the lower part of the left side surface, a furnace door up-down left limiting roller 211 is rotatably arranged on the furnace door left side surface limiting roller seat 21, the furnace door up-down left limiting roller 211 and the furnace mouth left side wall slide rail groove 1411 form a rolling pair, a furnace door right side surface limiting roller seat 22 is respectively fixed on the right side surface of the furnace door 2 and respectively positioned at the upper part and the lower part of the right side surface, a furnace door up-down right limiting roller 221 is rotatably arranged on the furnace door right side surface limiting roller seat 22, and the furnace door up-down right limiting roller 221 and the furnace mouth right side wall slide rail groove 1511 form a rolling pair; the left end of the furnace body top frame 13 corresponds to the upper part of the furnace opening left side wall 14 and is fixed with a furnace body top frame left bracket 131, and the right end of the furnace body top frame 13 corresponds to the upper part of the furnace opening right side wall 15 and is fixed with a furnace body top frame right bracket 132; a door left upper pressing roller baffle 23a is fixed on the upper part of the left edge part of the side of the furnace door 2 back to the hearth 12, and a door left lower pressing roller baffle 23b is fixed on the lower part of the furnace door and at the position corresponding to the lower part of the door left upper pressing roller baffle 23 a; a furnace door upper right pressing door roller baffle plate 23c is fixed on the upper part of the right edge part of the side of the furnace door 2 back to the hearth 12, and a furnace door lower right pressing door roller baffle plate 23d is fixed on the lower part of the furnace door 2 and at the position corresponding to the lower part of the furnace door upper right pressing door roller baffle plate 23 c; the oven door left automatic closing mechanism 4 is simultaneously engaged with or disengaged from the rear side surfaces of the oven door left upper door-pressing roller baffle 23a and the oven door left lower door-pressing roller baffle 23b, and the oven door right automatic closing mechanism 5 is simultaneously engaged with or disengaged from the rear side surfaces of the oven door right upper door-pressing roller baffle 23c and the oven door right lower door-pressing roller baffle 23d in a state of synchronous operation with the oven door left automatic closing mechanism 4.

The automatic door lifting mechanism 3 is provided between the furnace body upper frame left bracket 131 and the furnace body upper frame right bracket 132.

Taking the current position state of fig. 1 as an example, the slide rail groove 1411 on the left side wall of the oven port does not movably limit the left limit roller 211 on the up-down movement of the oven port forward or backward to ensure that the oven port has a front-back movable space, and the slide rail groove 1511 on the right side wall of the oven port does not movably limit the right limit roller 221 on the up-down movement of the oven port forward or backward to ensure that the oven port has a front-back movable space.

Continuing to refer to fig. 1 and 2, the automatic oven door lifting mechanism 3 includes a motor 31, a motor driving sprocket 32a, a driving chain 32b, a driven sprocket 33, a drag chain duplex sprocket 34, a drag chain transition duplex sprocket 35, a drag chain transition sprocket 36, an oven door lifting first drag chain i 37a, an oven door lifting second drag chain ii 37b, a supporting top beam 38 and a counterweight 39, wherein the left end of the supporting top beam 38 is fixed to the upper portion of the oven body top frame left bracket 131 through a supporting top beam left supporting bar 381 (using U-shaped channel steel) and extends to the left side of the supporting top beam left supporting bar 381, the right end of the supporting top beam 38 is fixed to the upper portion of the oven body top frame right bracket 132 through a supporting top beam right supporting bar 382 (using U-shaped channel steel), the motor 31 is fixed to the motor supporting base 311 through a fastener such as a screw, and the motor supporting base 311 is preferably welded (but may also use bolts and the like) to the oven body top frame left bracket 131 A motor driving sprocket 32a is fixed on a motor shaft 312 of the motor 31, one end of a driving chain 32b is sleeved on the motor driving sprocket 32a, the other end is sleeved on a driven sprocket 33, the driven sprocket 33 is fixed on the middle part of the driven sprocket shaft 331, the front end and the rear end of the driven sprocket shaft 331 are respectively and rotatably supported on a driven sprocket shaft supporting base 3311, the driven sprocket shaft supporting base 3311 is fixed on the left end of the supporting top beam 38, a drag chain double sprocket 34 is also fixed on the middle part of the driven sprocket shaft 331 at a position in front of the driven sprocket 33, a drag chain transition double sprocket 35 is fixed on the middle part of the drag chain transition double sprocket shaft 351 and corresponds to the left end of the upper surface of the oven door 2, the front end and the rear end of the drag chain transition double sprocket shaft 351 are respectively and rotatably supported on a drag chain transition double sprocket shaft supporting base 3511, the supporting seat 3511 of the transition duplex sprocket shaft of the drag chain is fixed in the middle of the supporting top beam 38, the transition sprocket 36 of the drag chain is positioned at the right side of the transition duplex sprocket 35 of the drag chain, the transition sprocket 36 of the drag chain is fixed in the middle of the transition sprocket shaft 361 of the drag chain and corresponds to the right end of the upper surface of the oven door 2, the front end and the rear end of the transition sprocket shaft 361 of the drag chain are respectively and rotatably supported on the supporting seat 3611 of the transition duplex sprocket shaft of the drag chain, the supporting seat 3611 of the transition duplex sprocket shaft of the drag chain is also fixed in the middle of the supporting top beam 38 at the position corresponding to the right side of the supporting seat 3511 of the transition duplex sprocket shaft of the drag chain, one end of the first drag chain I37 a for elevating the oven door is fixedly connected with the top of the counterweight 39, the other end is connected with the right end of the upper surface of the oven door 2 after being sequentially sleeved on the double sprocket 34 of the drag chain, the transition duplex sprocket 35 of the drag chain and the transition duplex sprocket 36 of the drag chain, one end of the second traction chain II 37b for lifting the oven door is also fixedly connected with the top of the counterweight block 39, the other end is connected with the left end of the upper surface of the oven door 2 after being sequentially sleeved on the double-row chain wheel 34 of the traction chain and the transition double-row chain wheel 35 of the traction chain, the counterweight block 39 is arranged in the counterweight block guide slide rail 391 in a vertically sliding manner, and the counterweight block guide slide rail 3914 is arranged on the left side of the left side wall 14 of the oven opening in a longitudinal state.

A tension sprocket seat 3811 is disposed on the left supporting strip 381 of the supporting top cross beam, a tension sprocket 38111 is rotatably disposed on the tension sprocket seat 3811 via a tension sprocket shaft, and the tension sprocket 38111 is engaged with the driving chain 32 b; the motor 31 described above is a motor having a forward and reverse rotation function.

As shown in fig. 1, a door lifting right lifting lug 24a is fixed at the right end of the upper surface of the oven door 2, a door lifting left lifting lug 24b is fixed at the left end of the upper surface of the oven door 2, a pair of counterweight chain fixing lugs 392 is fixed at the top of the counterweight 39, one ends of the oven door lifting first traction chain i 37a and the oven door lifting second traction chain ii 37b are respectively and fixedly connected with the pair of counterweight chain fixing lugs 392, the other end of the oven door lifting first traction chain i 37a is connected with the oven door lifting right lifting lug 24a, and the other end of the oven door lifting second traction chain ii 37b is connected with the oven door lifting left lifting lug 24 b.

When the motor 31 works, the motor shaft 312 drives the motor driving sprocket 32a, the motor driving sprocket 32a drives the driven sprocket 33 through the driving chain 32b, the driven sprocket 33 drives the driven sprocket shaft 331, the driven sprocket shaft 331 drives the double sprocket 34 of the traction chain, and the double sprocket 34 of the traction chain simultaneously drives the furnace door lifting first traction chain I37 a and the furnace door lifting second traction chain II 37b, so that the furnace door 2 moves upwards, the furnace chamber 12 is opened, and the counterweight 39 moves downwards relatively; on the contrary, when the motor 31 works in the opposite direction, the oven door 2 moves downwards and the counterweight 39 moves upwards according to the principle opposite to the above, so that the oven door 2 can be lifted or lowered according to the requirement, namely the oven door 2 is opened or closed.

Referring to fig. 1, the left automatic door closer 4 includes a left lifting link driving cylinder 41, a left lifting link 42, a left upper door-pressing roller-blocking device 43 and a left lower door-pressing roller-blocking device 44, the left lifting link driving cylinder 41 is connected to a left lifting link driving cylinder base 412 through a hinge pin with a left lifting link driving cylinder column 411 facing downward, the left lifting link driving cylinder base 412 is fixed to the left end of the furnace body top frame 13, the left upper door-pressing roller-blocking device 43 and the left lower door-pressing roller-blocking device 44 are disposed in front of the left side wall 14 of the furnace opening in a vertically corresponding manner, and the right end of the left upper door-pressing roller-blocking device 43 is fitted to or released from the rear side of the left upper door-pressing roller-blocking plate 23a over the left side wall rail 141 of the furnace opening rightward, the right end of the left lower door-pressing roller baffle acting device 44 is matched with or separated from the rear side surface of the left lower door-pressing roller baffle 23b of the oven door by passing through the left side wall slide rail 141 of the oven opening rightwards, the upper end of the left lifting connecting rod 42 is hinged with the left lifting connecting rod driving acting cylinder column 411, the left upper door-pressing roller baffle acting device 43 is connected with the middle part of the left lifting connecting rod 42, and the left lower door-pressing roller baffle acting device 44 is connected with the lower end of the left lifting connecting rod 42.

Continuing to refer to fig. 1, the aforementioned upper left door-pressing roller baffle actuation device 43 comprises a left lifting link middle connecting arm 431, a left lifting link middle connecting arm shaft 432, a door upper left door-pressing roller baffle actuation roller arm 433, and a door upper left door-pressing roller baffle actuation roller 434, wherein the upper end of the left lifting link middle connecting arm 431 is connected to the middle of the aforementioned left lifting link 42 via a left lifting link middle connecting arm pin 4311, and the lower end of the left lifting link middle connecting arm 431 is formed with a left lifting link middle connecting arm bushing 4312, the left lifting link middle connecting arm bushing 4312 is fixedly sleeved on the middle of the left lifting link middle connecting arm shaft 432, the left and right ends of the left lifting link middle connecting arm shaft 432 are rotatably supported on the left lifting link middle connecting arm shaft support 4321, and the right end of the left lifting link middle connecting arm shaft 432 passes over the aforementioned left side furnace mouth wall slide rail 141 to the right, the left lifting link middle connecting arm shaft support 4321 is fixed to the front side surface of the furnace door left side wall 14, the door upper left door pressing roller shutter acting roller arm 433 is fixed to the right end of the left lifting link middle connecting arm shaft 432 at the position on the right side of the furnace door left side wall slide rail 141, the door upper left door pressing roller shutter acting roller 434 is rotatably provided on the door upper left door pressing roller shutter acting roller arm 433, and the door upper left door pressing roller shutter acting roller 434 corresponds to the rear of the door upper left door pressing roller shutter 23a in a state where the door 2 is closed to the open part of the furnace chamber 12.

The left lower push door roller shutter 44 includes a left lift link lower connecting arm 441, a left lift link lower connecting arm shaft 442, a door left lower push door roller shutter operating roller arm 443, and a door left lower push door roller shutter operating roller 444, the upper end of the left lift link lower connecting arm 441 is connected to the lower portion of the left lift link 42 by a left lift link lower connecting arm pin 4411, and the lower end of the left lift link lower connecting arm 441 is formed with a left lift link lower connecting arm boss 4412, the left lift link lower connecting arm boss 4412 is fitted to the middle portion of the left lift link lower connecting arm shaft 442, the left and right ends of the left lift link lower connecting arm shaft 442 are rotatably supported on the left lift link lower connecting arm shaft boss 4421, and the right end of the left lift link lower connecting arm shaft 442 passes over the left side wall slide rail 141 of the door opening rightward, the left lifting link lower connecting arm shaft support 4421 is fixed to the front side surface of the furnace port left side wall 14, the furnace door left lower door-pressing roller shutter acting roller arm 443 is fixed to the right end of the left lifting link lower connecting arm shaft 442 at the position on the right side of the furnace port left side wall slide rail 141, the furnace door left lower door-pressing roller shutter acting roller 444 is rotatably provided on the furnace door left lower door-pressing roller shutter acting roller arm 443, and the furnace door left lower door-pressing roller shutter acting roller 444 corresponds to the rear of the furnace door left lower door-pressing roller shutter 23b in a state where the furnace door 2 is closed with respect to the open portion of the furnace chamber 12. In the present embodiment, the left lifting link driving cylinder 41 is an air cylinder.

Referring to fig. 2 in combination with fig. 1, the right automatic door locking mechanism 5 includes a right lifting link driving cylinder 51, a right lifting link 52, a right upper door pressing roller blocking plate acting device 53 and a right lower door pressing roller blocking plate acting device 54, the right lifting link driving cylinder 51 is connected with a right lifting link driving cylinder base 512 with a right lifting link driving cylinder column 511 facing downward, the right lifting link driving cylinder base 512 is fixed with the right end of the furnace body top frame 13, the right upper door pressing roller blocking plate acting device 53 and the right lower door pressing roller blocking plate acting device 54 are disposed at the front side of the right side wall 15 of the furnace opening in a vertically corresponding state, and the left end of the right upper door pressing roller blocking plate acting device 53 is engaged with or disengaged from the rear side of the right upper door pressing roller blocking plate 23c of the furnace opening across the right side wall slide rail 151 to the left, the left end of the right lower door-depressing roller-shutter acting device 54 is engaged with or disengaged from the rear side surface of the door-opening right lower door-depressing roller shutter 23d while passing leftward the door-opening right side wall slide rail 151, the upper end of the right elevation link 52 is hinged to the right elevation link driving-acting cylinder column 511, the right upper door-depressing roller-shutter acting device 53 is connected to the middle portion of the right elevation link 52, and the right lower door-depressing roller-shutter acting device 54 is connected to the lower end of the right elevation link 52.

The right upper door-pressing roller baffle acting device 53 comprises a right lifting link middle connecting arm 531, a right lifting link middle connecting arm shaft 532, a door right upper door-pressing roller baffle acting roller arm 533 and a door right upper door-pressing roller baffle acting roller 534, the upper end of the right lifting link middle connecting arm 531 is connected with the middle part of the right lifting link 52 through a right lifting link middle connecting arm pin shaft 5311, the lower end of the right lifting link middle connecting arm 531 is formed with a right lifting link middle connecting arm shaft sleeve 5312, the right lifting link middle connecting arm shaft sleeve 5312 is fixedly sleeved on the middle part of the right lifting link middle connecting arm shaft 532, the left end and the right end of the right lifting link middle connecting arm shaft 532 are rotatably supported on the right lifting link middle connecting arm shaft supporting seat 5321, and the left end of the right lifting link middle connecting arm shaft 532 goes over the furnace mouth right side wall slide rail 151 leftwards, the middle connecting arm shaft support 5321 of the right elevating link is fixed to the front side of the right side wall 15 of the furnace opening, the upper right door-pressing roller-blocking roller arm 533 of the furnace door is fixed to the left side of the right side wall slide rail 151 of the furnace opening, and the left connecting arm shaft 532 of the right elevating link is fixed to the left side, the upper right door-pressing roller-blocking roller 534 of the furnace door is rotatably provided on the upper right door-pressing roller-blocking roller arm 533 of the furnace door, and the upper right door-pressing roller-blocking roller 534 of the furnace door corresponds to the rear of the upper right door-pressing roller blocking roller 23c of the furnace door when the furnace door 2 is in a state of closing the open part of the furnace chamber 12.

The right lower push-down door roller shutter acting device 54 includes a right lift link lower connecting arm 541, a right lift link lower connecting arm shaft 542, a door right lower push-down door roller shutter acting roller arm 543 and a door right lower push-down door roller shutter acting roller 544, the upper end of the right lift link lower connecting arm 541 is connected to the lower portion of the right lift link 52 by a right lift link lower connecting arm pin 5411, and the lower end of the right lift link lower connecting arm 541 is formed with a right lift link lower connecting arm boss 5412, the right lift link lower connecting arm boss 5412 is fixedly fitted to the middle portion of the right lift link lower connecting arm shaft 542, the left and right ends of the right lift link lower connecting arm shaft 542 are rotatably supported on the right lift link lower connecting arm shaft boss 5421, and the left end of the right lift link lower connecting arm shaft 542 passes over the door opening right side wall slide rail 151 leftward, the right lifting link lower link shaft support 5421 is fixed to the front side of the furnace opening right side wall 15, the furnace door right lower door depressing roller shutter acting roller arm 543 is fixed to the left side of the furnace opening right side wall slide rail 151 and to the left side of the right lifting link lower link shaft 542, the furnace door right lower door depressing roller shutter acting roller 544 is rotatably provided on the furnace door right lower door depressing roller shutter acting roller arm 543, and the furnace door right lower door depressing roller shutter acting roller 544 corresponds to the rear of the furnace door right lower door depressing roller shutter 23d in a state where the furnace door 2 is closed to the open portion of the furnace chamber 12.

In the present embodiment, the right elevation link drive cylinder 51 is a cylinder.

Preferably, a set of oven door friction reducing rolling guides 111 is arranged on the chassis 11 and at intervals at the front side of the chassis 11, and the bottom surface of the oven door 2 corresponds to the oven door friction reducing rolling guides 111.

The structure of the furnace door left automatic fastening mechanism 4 and the furnace door right automatic fastening mechanism 5 is completely the same and the actions of the two mechanisms are synchronous. Therefore, the applicant first describes the operation principle of the right automatic door locking mechanism 5 shown in fig. 2, and under the effect of the door lifting mechanism 3, the door 2 is in a descending state, that is, the left side of the door 2 descends along the door left side wall slide rail groove 1411 and the door right side wall slide rail groove 1511 respectively through the door up-down left limit roller 211 and the right side of the door 2 through the door up-down right limit roller 221 until the bottom surface of the door 2 is supported on the door friction-reducing rolling guide 111.

When the oven door 2 is to be opened, the right lifting link driving cylinder 51 of the structural system of the oven door right automatic closing mechanism 5 is operated, the right lifting link driving cylinder column 511 extends outward toward the cylinder body, i.e., extends downward in the state shown in fig. 2, drives the right lifting link 52, and the right lifting link 52 simultaneously drives the right lifting link middle connecting arm 531 and the right lifting link lower connecting arm 541 to rotate clockwise, so that the oven door right upper door pressing roller baffle acting roller arm 533 and the oven door right lower door pressing roller baffle acting roller arm 543 also rotate clockwise, thereby causing the oven door right upper door pressing roller baffle acting roller 534 and the oven door right lower door pressing roller baffle acting roller 544 to simultaneously push the oven door right upper door pressing roller baffle 23c and the oven door right lower door pressing roller baffle 23d outward, respectively, so that a gap (also called 1211) is generated between one side (i.e., the rear side) of the oven door 2 facing the oven cavity 12 and the oven cavity left front side and the oven cavity right front side 1221. Space "). In the above process, the oven door left automatic closing mechanism 4 works simultaneously and in the same way as the oven door right automatic closing mechanism 5. When the oven door 2 is in the aforementioned state, the oven door 2 can be lifted upward by the operation of the oven door automatic lifting mechanism 3 and takes the state shown in fig. 1.

Still taking fig. 2 as an example, when the furnace door 2 is to be closed tightly, the furnace door 2 is first descended to the extent shown in fig. 2 by the operation of the furnace door automatic lifting mechanism 3, then, the right lifting link driving cylinder 51 works in the opposite direction to the above, so that the right lifting link driving cylinder column 511 retracts into the cylinder body to drive the right lifting link 52 to move upward, the right lifting link 52 simultaneously drives the right lifting link middle connecting arm 531 and the right lifting link lower connecting arm 541 to rotate counterclockwise, and the door 2 opening process is reversed to apply an acting force to the side of the door 2 opposite to the furnace 12 to make the door 2 tightly contact with the front side 1211 of the left wall 1211 of the furnace and the front side 1221 of the right wall 1221 of the furnace, so as to tightly close the door 2.

The operation of the motor 31 and the left and right elevation

link driving cylinders

41 and 51 can be controlled by the operation of the controller switch by the operator, or by arranging a signal collector at a reasonable position.

In conclusion, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the utility model task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. An automatic furnace door pressing device of an industrial furnace, the industrial furnace comprises a furnace body (1) which is arranged on a bottom frame (11) and forms a furnace chamber (12), and the top of the furnace body (1) is provided with a furnace body top frame (13); the automatic furnace door pressing device is characterized by comprising a left furnace door automatic closing mechanism (4) and a right furnace door automatic closing mechanism (5) which are used for applying pressing force to one side of the furnace door (2) back to the furnace (12) to enable the furnace door (2) to be closely matched with the open part of the furnace (12) when the furnace door (2) is in a closed state, the left furnace door automatic closing mechanism (4) is arranged on the left furnace opening side wall (14) of the furnace body (1) in a state of being connected with the left end of the furnace body top frame (13) and matched with or disengaged from the left edge part of the side of the furnace door (2) back to the furnace (12), and the right furnace door automatic closing mechanism (5) is arranged on the right furnace opening side wall (15) of the furnace body (1) in a state of being connected with the right end of the furnace body top frame (13) and is matched with or disengaged from the furnace door (2) back to the furnace body (12) The right edge part of one side of the chamber (12) is matched or not matched.

2. The automatic door pressing device of an industrial kiln according to claim 1, characterized in that a left edge portion of a side of the door (2) facing the hearth (12) corresponds to a front side (1211) of a left wall (121) of the hearth (12), and a right edge portion of the side of the door (2) facing the hearth (12) corresponds to a front side (1221) of a right wall (122) of the hearth (12); a furnace mouth left side wall slide rail (141) is formed at a position corresponding to the right side of the furnace mouth left side wall (14), the upper end of the furnace mouth left side wall slide rail (141) extends upwards, a furnace mouth left side wall slide rail groove (1411) is formed at the left side of the furnace mouth left side wall slide rail (141) in the height direction, a furnace mouth right side wall slide rail (151) is formed at a position corresponding to the left side of the furnace mouth right side wall (15), the upper end of the furnace mouth right side wall slide rail (151) extends upwards, and a furnace mouth right side wall slide rail groove (1511) is formed at the left side of the furnace mouth right side wall slide rail (151) in the height direction; a furnace door left side limiting roller seat (21) is respectively fixed on the left side surface of the furnace door (2) and is respectively positioned at the upper part and the lower part of the left side surface, a furnace door up-down left limiting roller (211) is rotatably arranged on the furnace door left side surface limiting roller seat (21), the furnace door up-down left limiting roller (211) and the furnace opening left side wall slide rail groove (1411) form a rolling pair, a furnace door right side limiting roller seat (22) is respectively fixed on the right side surface of the furnace door (2) and is respectively positioned at the upper part and the lower part of the right side surface, a furnace door up-down right limiting roller (221) is rotatably arranged on the furnace door right side limiting roller seat (22), and the furnace door up-down right limiting roller (221) and the furnace opening right side wall slide rail groove (1511) form a rolling pair; the left end of the furnace body top frame (13) corresponds to the upper part of the furnace opening left side wall (14) and is fixedly provided with a furnace body top frame left bracket (131), and the right end of the furnace body top frame (13) corresponds to the upper part of the furnace opening right side wall (15) and is fixedly provided with a furnace body top frame right bracket (132); a furnace door left upper pressing door roller baffle plate (23a) is fixed at the upper part of the left edge part of one side of the furnace door (2) back to the hearth (12), and a furnace door left lower pressing door roller baffle plate (23b) is fixed at the lower part of the furnace door and at the position corresponding to the lower part of the furnace door left upper pressing door roller baffle plate (23 a); a furnace door right upper pressing door roller baffle plate (23c) is fixed at the upper part of the right edge part of one side of the furnace door (2) back to the hearth (12), and a furnace door right lower pressing door roller baffle plate (23d) is fixed at the lower part of the furnace door and at the position corresponding to the lower part of the furnace door right upper pressing door roller baffle plate (23 c); the furnace door left automatic fastening mechanism (4) is matched with or disengaged from the rear side face of a furnace door left upper pressing door roller baffle plate (23a) and a furnace door left lower pressing door roller baffle plate (23b) at the same time, and the furnace door right automatic fastening mechanism (5) is matched with or disengaged from the rear side face of a furnace door right upper pressing door roller baffle plate (23c) and a furnace door right lower pressing door roller baffle plate (23d) at the same time under the state of synchronous action with the furnace door left automatic fastening mechanism (4).

3. The automatic door pressing device of an industrial kiln according to claim 2, wherein the door left automatic closing mechanism (4) comprises a left lifting link driving action cylinder (41), a left lifting link (42), a left upper door roller shutter action device (43) and a left lower door roller shutter action device (44), the left lifting link driving action cylinder (41) is connected with a left lifting link driving action cylinder base (412) in a state that a left lifting link driving action cylinder column (411) thereof is directed downward, the left lifting link driving action cylinder base (412) is fixed with a left end of the furnace body upper frame (13), the left upper door roller shutter action device (43) and the left lower door roller shutter action device (44) are disposed in a state of being up and down corresponding to each other on a front side of the left side wall (14) of the furnace opening, and a right end of the left upper door roller shutter action device (43) crosses the left side wall slide rail (141) of the furnace opening and the left side wall slide rail (44) of the furnace opening to the right and the left side of the furnace opening The rear side face of an upper left pressing door roller baffle plate (23a) of the furnace door is matched or disengaged, the right end of a lower left pressing door roller baffle plate acting device (44) also crosses the right side of a sliding rail (141) on the left side wall of the furnace opening and the rear side face of a lower left pressing door roller baffle plate (23b) of the furnace door are matched or disengaged, the upper end of a left lifting connecting rod (42) is hinged with a cylinder column (411) for driving action of the left lifting connecting rod, an upper left pressing door roller baffle plate acting device (43) is connected with the middle part of the left lifting connecting rod (42), and the lower left pressing door roller baffle plate acting device (44) is connected with the lower end of the left lifting connecting rod (42).

4. The automatic door pressing device of an industrial kiln according to claim 3, wherein the upper left pressing door roller baffle acting device (43) comprises a left lifting link middle connecting arm (431), a left lifting link middle connecting arm shaft (432), a door upper left pressing door roller baffle acting roller arm (433) and a door upper left pressing door roller baffle acting roller (434), the upper end of the left lifting link middle connecting arm (431) is connected with the middle of the left lifting link (42) through a left lifting link middle connecting arm pin shaft (4311), the lower end of the left lifting link middle connecting arm (431) is formed with a left lifting link middle connecting arm shaft sleeve (4312), the left lifting link middle connecting arm sleeve (4312) is fixedly sleeved on the middle of the left lifting link middle connecting arm shaft (432), the left end and the right end of the left lifting link middle connecting arm shaft (432) are rotatably supported on the left lifting link middle connecting arm shaft supporting seat (4321), the right end of a connecting arm shaft (432) in the middle of the left lifting connecting rod rightwards crosses a sliding rail (141) on the left side wall of the furnace opening, a supporting seat (4321) of the connecting arm shaft in the middle of the left lifting connecting rod is fixed with the front side surface of the left side wall (14) of the furnace opening, a roller arm (433) for blocking the left upper pressing door roller is fixed with the right end of the connecting arm shaft (432) in the middle of the left lifting connecting rod at the right side of the sliding rail (141) on the left side wall of the furnace opening, a roller (434) for blocking the left upper pressing door roller is rotationally arranged on the roller arm (433) for blocking the left upper pressing door roller on the furnace door, and the roller (434) for blocking the left upper pressing door roller on the furnace door corresponds to the rear part of the roller blocking plate (23a) of the furnace door when the furnace door (2) is in a state of closing the opening part of the furnace chamber (12); the left lower pressing door roller baffle acting device (44) comprises a left lifting connecting rod lower connecting arm (441), a left lifting connecting rod lower connecting arm shaft (442), a furnace door left lower pressing door roller baffle acting roller arm (443) and a furnace door left lower pressing door roller baffle acting roller (444), the upper end of the left lifting connecting rod lower connecting arm (441) is connected with the lower part of the left lifting connecting rod (42) through a left lifting connecting rod lower connecting arm pin shaft (4411), the lower end of the left lifting connecting rod lower connecting arm (441) is provided with a left lifting connecting rod lower connecting arm shaft sleeve (4412), the left lifting connecting rod lower connecting arm shaft sleeve (4412) is fixedly sleeved at the middle part of the left lifting connecting rod lower connecting arm shaft (442), the left end and the right end of the left lifting connecting rod lower connecting arm shaft (442) are rotatably supported on the left lifting connecting rod lower connecting arm shaft supporting seat (4421), and the right end of the left lifting connecting rod lower connecting arm shaft (442) rightwards crosses the furnace opening left side wall slide rail (141), the left lifting connecting rod lower connecting arm shaft supporting seat (4421) is fixed with the front side surface of the furnace opening left side wall (14), a furnace door left lower pressing door roller baffle acting roller arm (443) is fixed with the right end of the left lifting connecting rod lower connecting arm shaft (442) at the position on the right side of the furnace opening left side wall slide rail (141), a furnace door left lower pressing door roller baffle acting roller (444) is rotatably arranged on the furnace door left lower pressing door roller baffle acting roller arm (443), and the furnace door left lower pressing door roller baffle acting roller (444) corresponds to the rear of the furnace door left lower pressing door baffle (23b) when the furnace door (2) is in a state of closing the open part of the furnace chamber (12).

5. The automatic door pressing device of an industrial kiln according to claim 3, wherein the left lifting link driving cylinder (41) is a pneumatic cylinder.

6. The automatic pressing device for the furnace door of industrial kiln as claimed in claim 2, wherein said right automatic furnace door closing mechanism (5) comprises a right elevation link driving action cylinder (51), a right elevation link (52), an upper right door-pressing roller baffle action device (53) and a lower right door-pressing roller baffle action device (54), the right elevation link driving action cylinder (51) is connected with the right elevation link driving action cylinder base (512) in a state that its right elevation link driving action cylinder column (511) is directed downward, and the right elevation link driving action cylinder base (512) is fixed with the right end of said furnace body top frame (13), the upper right door-pressing roller baffle action device (53) and the lower right door-pressing roller baffle action device (54) are disposed in a state of corresponding up and down to each other on the front side of said right side wall (15) of said furnace mouth, and the left end of the upper right door-pressing roller baffle action device (53) goes leftward over said right side wall slide rail (151) of furnace mouth and said right side wall (54) and said right door-pressing roller baffle action device (54) of said furnace mouth The rear side face of the oven door right upper pressing door roller baffle (23c) is matched or not matched, the left end of the right lower pressing door roller baffle acting device (54) also goes across the oven opening right side wall slide rail (151) leftwards to be matched or not matched with the rear side face of the oven door right lower pressing door roller baffle (23d), the upper end of the right lifting connecting rod (52) is hinged with the right lifting connecting rod driving acting cylinder column (511), the right upper pressing door roller baffle acting device (53) is connected with the middle part of the right lifting connecting rod (52), and the right lower pressing door roller baffle acting device (54) is connected with the lower end of the right lifting connecting rod (52).

7. The automatic pressing device for the furnace door of industrial furnace as claimed in claim 6, wherein said upper right door-pressing roller baffle acting device (53) comprises a right lifting link middle connecting arm (531), a right lifting link middle connecting arm shaft (532), a furnace door upper right door-pressing roller baffle acting roller arm (533), and a furnace door upper right door-pressing roller baffle acting roller (534), the upper end of the right lifting link middle connecting arm (531) is connected with the middle of said right lifting link (52) through a right lifting link middle connecting arm pin shaft (5311), the lower end of the right lifting link middle connecting arm (531) forms a right lifting link middle connecting arm shaft sleeve (5312), the right lifting link middle connecting arm shaft sleeve (5312) is fixedly sleeved on the middle of the right lifting link middle connecting arm shaft (532), the left end and the right end of the right lifting link middle connecting arm shaft (532) are rotatably supported on the right lifting link middle connecting arm shaft (5321), the left end of a connecting arm shaft (532) in the middle of the right lifting connecting rod passes over the sliding rail (151) on the right side wall of the furnace opening leftwards, a supporting seat (5321) of the connecting arm shaft in the middle of the right lifting connecting rod is fixed with the front side surface of the right side wall (15) of the furnace opening, a roller arm (533) for blocking the right upper pressing door roller is fixed with the left end of the connecting arm shaft (532) in the middle of the right lifting connecting rod at the position on the left side of the sliding rail (151) on the right side wall of the furnace opening, a roller (534) for blocking the right upper pressing door roller is rotationally arranged on the roller arm (533) for blocking the right upper pressing door roller, and the roller (534) for blocking the right upper pressing door roller corresponds to the rear part of the roller (23c) for blocking the opening part of the hearth (12) of the furnace door (2); the right lower pressing door roller baffle acting device (54) comprises a right lifting connecting rod lower connecting arm (541), a right lifting connecting rod lower connecting arm shaft (542), a furnace door right lower pressing door roller baffle acting roller arm (543) and a furnace door right lower pressing door roller baffle acting roller (544), the upper end of the right lifting connecting rod lower connecting arm (541) is connected with the lower part of the right lifting connecting rod (52) through a right lifting connecting rod lower connecting arm pin shaft (5411), the lower end of the right lifting connecting rod lower connecting arm (541) is provided with a right lifting connecting rod lower connecting arm shaft sleeve (5412), the right lifting connecting rod lower connecting arm shaft sleeve (5412) is fixedly sleeved at the middle part of the right lifting connecting rod lower connecting arm shaft (542), the left end and the right end of the right lifting connecting rod lower connecting arm shaft (542) are rotatably supported on the right lifting connecting rod lower connecting arm shaft supporting seat (5421), and the left end of the right lifting connecting rod lower connecting arm shaft (542) goes over the furnace mouth right side wall slide rail (151) leftwards, the right lifting connecting rod lower connecting arm shaft supporting seat (5421) is fixed with the front side surface of the furnace mouth right side wall (15), a furnace door right lower pressing door roller baffle acting roller arm (543) is fixed with the left end of the right lifting connecting rod lower connecting arm shaft (542) at the position of the left side of the furnace mouth right side wall slide rail (151), a furnace door right lower pressing door roller baffle acting roller (544) is rotationally arranged on the furnace door right lower pressing door roller baffle acting roller arm (543), and the furnace door right lower pressing door roller baffle acting roller (544) corresponds to the rear of the furnace door right lower pressing door roller baffle (23d) under the state that the furnace door (2) is closed to the opening part of the hearth (12).

8. The automatic pressing device for oven door of industrial kiln as claimed in claim 6, characterized in that the right lifting link driving acting cylinder (51) is a cylinder.

9. The automatic door pressing device of an industrial kiln according to claim 1, characterized in that a set of door friction reducing rolling guides (111) is provided at intervals on the bottom frame (11) and at the front side of the bottom frame (11), and the bottom surface of the door (2) corresponds to the door friction reducing rolling guides (111).