Box-type industrial furnace

Abstract

The invention relates to the technical field of industrial furnace equipment, in particular to a box-type industrial furnace which at least comprises a furnace box body, a sealing door assembly and a latch assembly. The sealing door assembly comprises a wheel shaft bearing, a lifting circular shaft, a balance weight rope wheel, a driven rope wheel, a door plate rope wheel, a shaking rope wheel, a shaking steering wheel, a balance weight cylinder and a heat preservation door plate. The latch assembly comprises a latch support, an upper linkage piece, a transmission connecting rod, a lower torsion piece and a crank assembly. The crank assembly comprises a connecting end plate, a grab handle assembly and a crank inner lock. The crank inner lock comprises a crank inner cavity, a downward moving assembly, a horizontal moving assembly and a lower lock head. According to the box-type industrial furnace disclosed by the invention, the adopted sealing door assembly is convenient to lift and can be suspended at will, and sealing and heat preservation can also be realized; according to the box-type industrial furnace, locking can be achieved through the manual crank and the lower torsion piece of the latch assembly, and then the heat preservation door plate is kept to be extruded and closed all the time.

Description

Technical Field

[0001] The present application relates to the technical field of industrial kiln equipment, and in particular to a box-type industrial furnace. Background Art

[0002] Box-type industrial electric furnaces are a common and important type of heat treatment equipment used in industrial production, laboratory research, and material processing. Their core characteristic is their box-like structure—a closed, typically rectangular or cubic heating chamber, known as the furnace. They also consist of the furnace body, heating elements, a furnace door, and a temperature control system. The doors of box-type industrial furnaces are all equipped with insulated door panels. These panels must meet at least the following technical requirements: 1. They must be able to be raised and lowered to facilitate loading and unloading of materials through the raised door; 2. They must be able to move forward and backward to facilitate a sealed connection between the panel and the door by squeezing forward.

[0003] In order to achieve the above purpose, the existing thermal insulation door panel is hoisted by a winding rope and then fixed by a lock, which is cumbersome to operate. Therefore, it is necessary to design a door latch mechanism that can be quickly locked and unlocked and a box-type industrial furnace with the mechanism. Summary of the Invention

[0004] A box-type industrial furnace comprises at least a furnace box body with a furnace cavity rear opening, a sealing door assembly for shielding the furnace cavity rear opening, and a latch assembly for sealing the sealing door assembly on the furnace cavity rear opening.

[0005] The sealed door assembly includes wheel bearings respectively arranged on the left and right sides of the upper end of the furnace body, and a lifting circular shaft rotatably arranged between the two wheel bearings. A counterweight pulley and a driven pulley are respectively provided on the left and right sides of the wheel bearings. A door panel pulley is also provided on the left and right sides of the middle part of the wheel bearing located at the rear opening of the furnace cavity. A shaking pulley cooperating with the driven pulley is also provided on the right end face of the furnace body. A shaking steering wheel is also provided on the shaking pulley. The counterweight pulley is connected to the counterweight cylinder by a winding rope, and the door panel pulley is connected to the insulation door panel by a winding rope.

[0006] The door latch assembly includes a door latch bracket, an upper linkage member, a transmission connecting rod, a lower torsion member, and a crank assembly; There are two latch brackets, one latch bracket is provided on the left and one on the right of the rear opening of the furnace cavity respectively, the latch bracket includes a longitudinal vertical rod, at least two connecting cross rods connected to the rear end face of the furnace box body are provided in front of the longitudinal vertical rod, an upper hole rod and a lower hole rod are provided above and below the rear end of the longitudinal vertical rod respectively; the right end face of the longitudinal vertical rod located on the right side is also provided with a locking groove; there are at least three locking grooves, and the locking grooves are distributed at equal intervals along the arc track.

[0007] The upper linkage member includes an upper linkage shaft rotatably arranged in a pair of upper holed rods, and an upper hinged arm is respectively provided on the left and right of the upper linkage shaft, and a stop end block is provided on the outer side of the upper hinged arm; The lower torsion member is provided with a pair, and the lower torsion member comprises a lower torsion shaft rotatably arranged in the lower perforated rod, a lower hinge arm arranged on the outer side of the lower torsion shaft, and an abutting terminal arranged on the inner side of the lower torsion shaft for squeezing the thermal insulation door panel; The transmission connecting rod is provided with a pair, one end of the transmission connecting rod is hinged to the corresponding upper hinge arm and the other end is hinged to the corresponding lower hinge arm; The crank assembly includes a connecting end plate fixedly connected to the lower hinged arm and a handle assembly arranged on the outside of the connecting end plate; the handle assembly is also provided with a crank internal lock.

[0008] The crank inner lock includes a crank inner cavity, a downward moving component, a translation component, and a lower locking head: The crank inner cavity includes a small-diameter through-hole axially extending through the handle assembly, an upward widening cavity provided at the upper half of the small-diameter through-hole, a longitudinal anti-rotation hole provided at the upper edge of the upward widening cavity, a spacing convex ring provided below the upward widening cavity, a downward widening cavity provided below the spacing convex ring, a cross stand provided at the upper end of the downward widening cavity, a stop end plate provided below the cross stand, vertical claw through-holes uniformly distributed on the stop end plate, and an anti-rotation side plate axially provided on the inner wall of the downward widening cavity; The downward moving assembly includes a pressing cylinder slidably arranged in the small-diameter through hole, a stopping disc arranged below the pressing cylinder and slidably engaged with the upward wide cavity, a downward moving side rod arranged on the side of the pressing cylinder and engaged with the longitudinal anti-rotation hole, a triggering cylinder arranged below the stopping disc and passing through the spacer convex ring, triggering claws uniformly distributed circumferentially on the lower end surface of the triggering cylinder, active inclined holes provided on the triggering claws, and a return compression spring wound around the triggering cylinder and abutting against the stopping disc; The translation assembly is provided with four parts, and the translation assembly includes a longitudinal slide, a stand socket provided on the longitudinal slide and slidably matched with the cross stand, an upper convex circle provided above the front end of the longitudinal slide and matched with the active inclined hole, and a lower convex circle provided below the rear end of the longitudinal slide; The lock head of the embodiment of the present invention is a kind of lock head of the invention, and it is a kind of lock head of the invention.

[0009] The beneficial effects of the above technical solution are as follows: The box-type industrial furnace described in this case uses a sealed door assembly that is easy to lift and lower, can be hovered at will, and can also achieve sealing and heat preservation: Easy to lift: rotate the rocking steering wheel and rocking rope wheel to drive the driven rope wheel, lifting shaft and door panel rope wheel to rotate. The door panel rope wheel drives the thermal insulation door panel to move longitudinally through the winding rope. At the same time, the counterweight rope wheel drives the counterweight cylinder to move in the opposite direction through the winding rope.

[0010] Random hovering: The winding direction of the rope on the door panel rope wheel is opposite to that of the rope on the counterweight rope wheel, so that the counterweight drum can apply one.

[0011] Sealing and heat preservation: the heat-insulating door panel is hoisted by a coiled rope, and a certain heat-insulating seal can be achieved by squeezing the rear opening of the furnace cavity forward.

[0012] The box-type industrial furnace described in this case has a door latch assembly whose manual crank handle and lower torsion piece can be locked, thereby keeping the thermal insulation door panel always squeezed and closed: flipping the manual crank forward drives the lower torsion piece on the right side to move, and the abutment terminal on the right side flips downward and squeezes the thermal insulation door panel. At the same time, the abutment terminal on the left side moves synchronously, and the two abutment terminals synchronously squeeze the thermal insulation door panel.

[0013] The box-type industrial furnace described in this case can also unlock the manual crank by a simple pressing action, which facilitates the adjustment of the position and posture of the manual crank and the lower torsion member. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 Schematic diagram of the first state of the box-type industrial furnace.

[0016] Figure 2 Schematic diagram of the second state of the box-type industrial furnace.

[0017] Figure 3 Schematic diagram of the third state of the box-type industrial furnace.

[0018] Figure 4 Schematic diagram of an embodiment of the furnace box body.

[0019] Figure 5 It is a schematic diagram of an embodiment of the crank assembly.

[0020] Figure 6 It is an axial cross-sectional view of the crank in the first state of internal locking.

[0021] Figure 7 It is an axial cross-sectional view of the crank in the second state of internal locking.

[0022] Figure 8 It is an isometric sectional view of the axial section of the crank in the first state of internal locking.

[0023] Figure 9 It is an isometric sectional view of the axial section of the crank in the second state of internal locking.

[0024] Figure 10 It is an isometric cross-section of the crank's inner lock.

[0025] Figure 11 It is an isometric cross-sectional view of an axial section of an embodiment of the crank handle inner cavity.

[0026] Figure 12 It is a cross-sectional isometric view of an embodiment of the crank handle inner cavity.

[0027] Figure 13 Schematic diagram of an embodiment of the downward moving component.

[0028] Figure 14 is a schematic diagram of an embodiment of the translation assembly.

[0029] Figure 15 It is a partial cross-sectional view of an embodiment of the bottom-mounted lock.

[0030] Figure 16 This is a schematic diagram of the crank in the first state of internal locking (the crank cavity is omitted).

[0031] Figure 17 It is a schematic diagram of the second state of the crank internal lock (omitting the crank cavity).

[0032] In the picture: 9. Furnace box body, 91. Rear opening of furnace cavity; 8. Sealed door assembly, 81. Wheel bearing, 82. Lifting shaft, 83. Counterweight pulley, 84. Driven pulley, 85. Door panel pulley, 86. Rocking pulley, 87. Rocking steering wheel, 88. Counterweight cylinder, 89. Insulated door panel; 7. Door latch assembly; 71. Latch bracket, 711. Vertical upright, 712. Connecting crossbar, 713. Upper perforated rod, 714. Lower perforated rod, 715. Locking groove; 72. Upper linkage member, 721. Upper linkage shaft, 722. Upper articulated arm, 723. Stop end block; 73. Transmission connecting rod; 74. Lower torsion member, 741. Lower torsion shaft, 742. Lower hinge arm, 743. Abutment terminal; 75. Crank assembly, 751. Connecting end plate, 752. Handle assembly, 753. Crank inner lock; 1. Crank handle cavity, 11. Small diameter through hole, 12. Upward widened cavity, 13. Vertical anti-rotation hole, 14. Spacer convex ring, 15. Downward widened cavity, 16. Cross stand, 17. Stop end plate, 18. Claw through hole, 19. Anti-rotation side plate; 2. Downward movement assembly, 21. Pressing cylinder, 22. Stop disc, 23. Downward movement side rod, 24. Trigger cylinder, 25. Trigger claw, 26. Active inclined hole, 27. Return compression spring; 3. Translation assembly, 31. Vertical slide, 32. Stand socket, 33. Upper convex circle, 34. Lower convex circle; 4. Lower lock, 41. Lock base, 42. Lock side hole, 43. Driven vertical claw, 44. Driven oblique hole, 45. Lock inner cavity, 46. Lock lower hole, 47. Lock inner column, 48. Lock compression spring, 49. Lock end block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0034] A box-type industrial furnace comprises at least a furnace box body 9 with a furnace cavity rear opening 91, a sealing door assembly 8 for shielding the furnace cavity rear opening 91, and a latch assembly 7 for sealing the sealing door assembly 8 on the furnace cavity rear opening 91.

[0035] The sealed door assembly 8 includes wheel bearings 81 respectively arranged on the left and right sides of the upper end of the furnace body 9, and a lifting circular shaft 82 rotatably arranged between the two wheel bearings 81. The wheel bearings 81 are respectively provided with a counterweight pulley 83 and a driven pulley 84 on the left and right sides. The middle part of the wheel bearing 81 is located on the left and right sides of the rear opening 91 of the furnace cavity, and a door panel pulley 85 is also provided. The right end face of the furnace body 9 is also provided with a shaking pulley 86 that cooperates with the driven pulley 84 for transmission. The shaking pulley 86 is also provided with a shaking steering wheel 87. The counterweight pulley 83 is connected to the counterweight cylinder 88 by a winding rope, and the door panel pulley 85 is connected to the insulation door panel 89 by a winding rope.

[0036] The latch assembly 7 includes a latch bracket 71, an upper linkage member 72, a transmission connecting rod 73, a lower torsion member 74, and a crank assembly 75; There are two latch brackets 71, and one latch bracket 71 is respectively provided on the left and right sides of the rear opening 91 of the furnace cavity. The latch bracket 71 includes a longitudinal vertical rod 711, and at least two connecting cross bars 712 connected to the rear end face of the furnace box body 9 are provided in front of the longitudinal vertical rod 711. An upper holed rod 713 and a lower holed rod 714 are respectively provided above and below the rear end of the longitudinal vertical rod 711; the right end face of the longitudinal vertical rod 711 located on the right side is also provided with a locking groove 715; there are at least three locking grooves 715, and the locking grooves 715 are evenly spaced along the arc track.

[0037] The upper linkage member 72 includes an upper linkage shaft 721 rotatably disposed within a pair of upper holed rods 713. An upper hinge arm 722 is provided on the left and right of the upper linkage shaft 721. Stop end blocks 723 are provided on the outer sides of the upper hinge arms 722. The lower torsion member 74 is provided with a pair, and the lower torsion member 74 includes a lower torsion shaft 741 rotatably provided in the lower perforated rod 714, a lower hinge arm 742 provided on the outside of the lower torsion shaft 741, and an abutting terminal 743 provided on the inside of the lower torsion shaft 741 for pressing the thermal insulation door panel 89; The transmission connecting rod 73 is provided with a pair, one end of the transmission connecting rod 73 is hinged to the corresponding upper hinge arm 722 and the other end is hinged to the corresponding lower hinge arm 742; The crank assembly 75 includes a connecting end plate 751 fixedly connected to the lower hinged arm 742, and a handle assembly 752 arranged on the outside of the connecting end plate 751; the handle assembly 752 is also provided with a crank inner lock 753.

[0038] The crank inner lock 753 includes a crank inner cavity 1, a downward moving component 2, a translation component 3, and a lower lock head 4: The crank inner cavity 1 includes a small-diameter through hole 11 axially extending through the handle assembly 752, an upwardly widening cavity 12 provided at the upper half of the small-diameter through hole 11, a longitudinal anti-rotation hole 13 provided at the upper edge of the upwardly widening cavity 12, a spacing protruding ring 14 provided below the upwardly widening cavity 12, a downwardly widening cavity 15 provided below the spacing protruding ring 14, a cross stand 16 provided at the upper end of the downwardly widening cavity 15, a stopper end plate 17 provided below the cross stand 16, vertical claw through holes 18 uniformly distributed on the stopper end plate 17, and an anti-rotation side plate 19 axially provided on the inner wall of the downwardly widening cavity 15. The downward moving assembly 2 includes a pressing cylinder 21 slidably disposed in the small-diameter through hole 11, a stop disc 22 disposed below the pressing cylinder 21 and slidably engaged with the upward wide cavity 12, a downward moving side rod 23 disposed on the side of the pressing cylinder 21 and engaged with the longitudinal anti-rotation hole 13, a triggering cylinder 24 disposed below the stop disc 22 and passing through the spacer convex ring 14, triggering claws 25 circumferentially distributed on the lower end surface of the triggering cylinder 24, active inclined holes 26 disposed on the triggering claws 25, and a return compression spring 27 wound around the triggering cylinder 24 and abutting against the stop disc 22. The translation assembly 3 is provided with four parts, and includes a longitudinal slide 31, a frame socket 32 ​​provided on the longitudinal slide 31 and slidably engaged with the cross frame 16, an upper convex circle 33 provided above the front end of the longitudinal slide 31 and engaged with the active inclined hole 26, and a lower convex circle 34 provided below the rear end of the longitudinal slide 31. The lower lock 4 includes a lock base 41 slidably arranged in the lower wide cavity 15, a lock side hole 42 arranged on the side of the lock base 41 and accommodating the anti-rotation side plate 19, driven claws 43 uniformly distributed on the upper end surface of the lock base 41 and corresponding to the translation assembly 3, driven inclined holes 44 arranged on the driven claws 43 and plugged into the lower convex circle 34, a lock inner cavity 45 arranged inside the lock base 41, a lock lower hole 46 arranged below the lock inner cavity 45, and a lock that can be locked. A lock inner column 47 slidingly arranged in the lock inner cavity 45, a lock compression spring 48 arranged in the lock inner cavity 45 and resting on the top of the lock inner column 47, a lock end block 49 arranged on the lower end surface of the lock inner column 47 and passing through the lock lower hole 46 and the small-diameter through hole 11, the lock end block 49 is locked with the locking groove 715; the active inclined hole 26 gradually tilts inward from top to bottom, and the driven inclined hole 44 tilts outward from top to bottom; the driven vertical claw 43 is set through the corresponding vertical claw through hole 18.

[0039] It should be noted that the stop end of the lock end block 49 is also provided with a pressure inclined surface.

[0040] It should be noted that the front end surface of the heat-insulating door panel 89 is provided with a heat-insulating layer made of a high-temperature resistant material. The high-temperature resistant material is one of ceramic fiber, glass fiber, and graphite fiber. Furthermore, the high-temperature resistant material is aluminum silicate fiber wool. The latch assembly 7 described in this case can press the thermal insulation door panel 89 of the sealing door assembly 8 forward to make it close to the rear opening 91 of the furnace cavity, thereby reducing the heat dissipation inside the furnace box body 9 of the industrial furnace.

[0041] The operation process of the latch assembly 7 and the sealing door assembly 8 is as follows: S1, the sealing door assembly 8 is opened: As the instruction manual Figure 1 As shown, The heat-insulating door panel 89 is at a high position, exposing the rear opening 91 of the furnace cavity for easy feeding.

[0042] At this time, the manual crank 75 is in the rear position, the lower torsion member 74 swings upward and drives the upper linkage member 72 to swing upward through the transmission link 73 until the transmission link 73 is blocked by the stop end block 723. At this time, the abutment terminal 743 tilts backward and does not squeeze the thermal insulation door panel 89. S2. The sealing door assembly 8 falls: As the instruction manual Figure 2 As shown, The rocking steering wheel 87 and the rocking rope pulley 86 are rotated to drive the driven rope pulley 84, the lifting shaft 82, and the door panel rope pulley 85 to rotate. The door panel rope pulley 85 lowers the thermal insulation door panel 89 to the same height as the rear opening 91 of the furnace cavity by winding the rope. The counterweight rope pulley 83 lifts the counterweight cylinder 88 by winding the rope. The rocking steering wheel 87 stops rotating, and the position of the thermal insulation door panel 89 remains relatively stable. S3. Sealing door assembly 8 seal: As the instruction manual Figure 3 As shown, Flip the manual crank 75 forward, driving the lower torsion member 74 on the right side to move, and the abutment terminal 743 on the right side flips forward and presses the thermal insulation door panel 89; At the same time, the lower hinged arm 742 on the right side flips downward and drives the upper hinged arm 722 on the right side, the upper linkage shaft 721, and the upper hinged arm 722 on the left side to flip downward through the transmission link 73. The upper hinged arm 722 on the left side drives the lower torsion member 74 on the left side to move through the transmission link 73 on the left side, so that the abutment terminal 743 on the left side synchronously squeezes the thermal insulation door panel 89.

[0043] The latch assembly 7 is cleverly designed, the upper linkage member 72 is located above the furnace cavity rear opening 91, and the latch bracket 71, transmission connecting rod 73, and lower torsion member 74 are located on the side of the furnace cavity rear opening 91, without interfering with the furnace cavity rear opening 91 and affecting the normal entry and exit of materials.

[0044] Furthermore, in order to control the degree of compression of the abutting terminal 743 on the thermal insulation door panel 89, it is necessary to adjust the stop position of the manual crank 75. The specific process is as follows: S1, crank inner lock 753 automatic locking: The lock end block 49 is squeezed by the outer wall of the vertical upright rod 711 on the right side, overcoming the damping of the lock compression spring 48 and retracting into the small-diameter through hole 11; The lock end block 49 is aligned with the locking groove 715 and pops out and is locked, maintaining the posture of the manual crank 75 and the lower twisting member 74, always pressing the thermal insulation door panel 89 forward; Continue to move the manual crank 75 forward, the compressed inclined surface of the lock end block 49 is squeezed to a retracted posture by the locking groove 715, and the lock end block 49 moves to the next locking groove 715 and pops out. At this time, the posture of the manual crank 75 and the lower torsion piece 74 moves further forward, giving the thermal insulation door panel 89 a tighter squeezing force.

[0045] S2, crank inner lock 753 manual unlocking: Press the downward moving assembly 2, the pressing cylinder 21 and the stopping disc 22 overcome the damping of the return spring 27 and move, driving the trigger cylinder 24, the trigger claw 25, and the active inclined hole 26 to move; The active inclined hole 26 acts on the upper convex circle 33 to drive the translation assembly 3 to move radially outward; The lower convex circle 34 acts on the driven inclined hole 44, thereby driving the lower lock head 4 to move in the direction opposite to the downward moving component 2. Although the lock head compression spring 48 is still in a relaxed state, the overall movement of the lower lock head 4 causes the lock head end block 49 to retract into the small-diameter through hole 11, and the lock head end block 49 is no longer locked with the locking groove 715. At this time, the hand crank handle 75 and the lower torsion member 74 can be pulled backward to release the lock on the thermal insulation door panel 89.

Claims

1. A box-type industrial furnace comprising at least a furnace box body (9) having a furnace cavity rear opening (91) and a sealing door assembly (8) for shielding the furnace cavity rear opening (91), characterized in that: The invention also includes a latch assembly (7) for sealing the sealing door assembly (8) on the rear opening (91) of the furnace cavity, wherein the latch assembly (7) includes a latch bracket (71), an upper linkage member (72), a transmission connecting rod (73), a lower torsion member (74), and a crank assembly (75); Two latch brackets (71) are provided, one latch bracket (71) is provided on the left and one on the right of the furnace cavity rear opening (91), the latch bracket (71) comprises a longitudinal vertical rod (711), at least two connecting cross bars (712) connected to the rear end surface of the furnace box body (9) are provided in front of the longitudinal vertical rod (711), and an upper hole rod (713) and a lower hole rod (714) are provided above and below the rear end of the longitudinal vertical rod (711), respectively. The upper linkage member (72) includes an upper linkage shaft (721) rotatably disposed within a pair of upper holed rods (713), an upper hinged arm (722) being provided on the left and right of the upper linkage shaft (721), and a stop end block (723) being provided on the outer side of the upper hinged arm (722); The lower torsion member (74) is provided with a pair, and the lower torsion member (74) includes a lower torsion shaft (741) rotatably provided in the lower perforated rod (714), a lower hinged arm (742) provided on the outside of the lower torsion shaft (741), and an abutting terminal (743) provided on the inside of the lower torsion shaft (741) for squeezing the thermal insulation door panel (89); A pair of transmission connecting rods (73) are provided, one end of the transmission connecting rod (73) is hinged to the corresponding upper hinge arm (722) and the other end is hinged to the corresponding lower hinge arm (742); The crank assembly (75) comprises a connecting end plate (751) fixedly connected to the lower hinged arm (742), and a handle assembly (752) arranged outside the connecting end plate (751).

2. A box-type industrial furnace according to claim 1, characterized in that: The right end surface of the longitudinal upright rod (711) located on the right side is also provided with a locking groove (715); The handle assembly (752) is further provided with a crank inner lock (753), and the crank inner lock (753) comprises a crank inner cavity (1), a downward moving component (2), a translation component (3), and a lower locking head (4): The crank inner cavity (1) comprises a small-diameter through hole (11) axially extending through the handle assembly (752), an upward widening cavity (12) provided at the upper half of the small-diameter through hole (11), a longitudinal anti-rotation hole (13) provided at the upper edge of the upward widening cavity (12), a spacing convex ring (14) provided below the upward widening cavity (12), a downward widening cavity (15) provided below the spacing convex ring (14), a cross stand (16) provided at the upper end of the downward widening cavity (15), a stop end plate (17) provided below the cross stand (16), vertical claw through holes (18) uniformly distributed on the stop end plate (17), and an anti-rotation side plate (19) provided axially on the inner wall of the downward widening cavity (15); The downward moving component (2) includes a pressing cylinder (21) slidably arranged in the small-diameter through hole (11), a stopping disc (22) arranged below the pressing cylinder (21) and slidably matched with the upward moving wide cavity (12), a downward moving side rod (23) arranged on the side of the pressing cylinder (21) and matched with the longitudinal anti-rotation hole (13), a triggering cylinder (24) arranged below the stopping disc (22) and passing through the spacer convex ring (14), triggering claws (25) uniformly distributed circumferentially on the lower end surface of the triggering cylinder (24), an active inclined hole (26) provided on the triggering claw (25), and a return compression spring (27) wound around the triggering cylinder (24) and abutting against the stopping disc (22); The translation assembly (3) is provided with four pieces, and the translation assembly (3) includes a longitudinal slide (31), a frame socket (32) provided on the longitudinal slide (31) and slidably matched with the cross frame (16), an upper convex circle (33) provided above the front end of the longitudinal slide (31) and matched with the active inclined hole (26), and a lower convex circle (34) provided below the rear end of the longitudinal slide (31); The lower lock (4) comprises a lock base (41) slidably arranged in the lower wide cavity (15), a lock side hole (42) arranged on the side of the lock base (41) and accommodating the anti-rotation side plate (19), driven claws (43) uniformly distributed on the upper end surface of the lock base (41) and corresponding to the translation assembly (3) in a circumferential direction, driven inclined holes (44) arranged on the driven claws (43) and plugged into the lower convex circle (34) in a one-to-one manner, and a A lock cavity (45), a lock lower hole (46) provided below the lock cavity (45), a lock inner column (47) slidably provided in the lock cavity (45), a lock compression spring (48) provided in the lock cavity (45) and resting against the upper portion of the lock inner column (47), a lock end block (49) provided on the lower end surface of the lock inner column (47) and passing through the lock lower hole (46) and the small-diameter through hole (11), wherein the lock end block (49) is locked with the locking groove (715).

3. A box-type industrial furnace according to claim 2, characterized in that: The sealed door assembly (8) comprises a wheel bearing (81) respectively arranged on the left and right sides of the upper end of the furnace body (9), and a lifting circular shaft (82) rotatably arranged between the two wheel bearings (81). The wheel bearing (81) is provided with a counterweight rope pulley (83) and a driven rope pulley (84) on the left and right sides respectively. A door panel rope pulley (85) is also provided on the left and right sides of the middle part of the wheel bearing (81) located at the rear opening (91) of the furnace cavity. A rocking rope pulley (86) that cooperates with the driven rope pulley (84) is also provided on the right end surface of the furnace body (9). A rocking steering wheel (87) is also provided on the rocking rope pulley (86). The counterweight rope pulley (83) is connected to the counterweight cylinder (88) through a winding rope, and the door panel rope pulley (85) is connected to the heat-insulating door panel (89) through a winding rope.

4. The box-type industrial furnace according to claim 3, characterized in that: At least three locking grooves (715) are provided, and the locking grooves (715) are distributed at equal intervals along the arc track.

5. The box-type industrial furnace according to claim 4, characterized in that: The active inclined hole (26) is gradually inclined inward from top to bottom, and the driven inclined hole (44) is inclined outward from top to bottom.

6. The box-type industrial furnace according to claim 5, characterized in that: The driven claw (43) is arranged through the corresponding claw through hole (18).

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