Box-type resistance heating furnace

Abstract

The invention relates to the technical field of kilns, in particular to a box-type resistance heating furnace which comprises a furnace body, furnace doors, a lifting assembly and a guide assembly, the front end of the furnace body extends inwards to form a furnace cavity, the furnace doors are divided into the first furnace door and the second furnace door, the first furnace door and the second furnace door are vertically arranged at the front end of the furnace body, and the lifting assembly is arranged on the furnace body. The lifting assembly is used for driving the first furnace door and the second furnace door to ascend or descend. The lifting assembly, the guide assembly, the first furnace door and the second furnace door are arranged, under the guiding effect of the guide assembly, the first furnace door and the second furnace door vertically move under the driving effect of the lifting assembly, and compared with the prior art, the furnace door is divided into two parts; the lifting height required by the first furnace door and the second furnace door is only half of the lifting height of the furnace door in the prior art, so that the space required to be reserved for opening the furnace door can be saved, and the transportation and the assembly of the box-type resistance heating furnace are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kiln, in particular to a box type resistance heating furnace. BACKGROUND

[0002] The box type resistance heating furnace is a common industrial heating equipment, mainly used for metal heat treatment, ceramic sintering and other processes requiring high temperature environment. The design of the furnace is usually cubic or cuboid, hence the name "box type". The box type resistance heating furnace is composed of a furnace body, a furnace door, heating elements, a thermal insulation layer, and a control system. The furnace body is hollow with an opening on one side. The furnace door is slidingly connected to the opening side of the furnace body. The heating elements are located inside the furnace body. The thermal insulation layer is laid on the inner circumferential wall of the furnace body. The controller is used to control the opening or closing of the furnace door and the temperature adjustment inside the furnace body.

[0003] The opening side of the furnace body of the existing box type resistance heating furnace is provided with a vertical sliding groove. The furnace door is provided with guide columns on both sides, which are slidingly connected in the sliding groove. The control system is used to control the furnace door to rise or fall under the guidance of the sliding groove and the guide columns, thereby opening or closing the furnace door. However, the existing box type resistance heating furnace has the following problems when in use: Since the height of the furnace door is usually high, the furnace door needs to be lifted to a high height each time it is opened, which occupies a large space and is not conducive to the transportation and assembly of the box type resistance heating furnace. SUMMARY

[0004] Therefore, it is necessary to provide a box type resistance heating furnace to solve the problem of high lifting height and large space occupation when the furnace door is opened.

[0005] The above-mentioned purpose is achieved by the following technical solutions: A box type resistance heating furnace, comprising: a furnace body, the front end of which extends inward to form a furnace chamber; a furnace door, which is divided into a first furnace door and a second furnace door, and the first furnace door and the second furnace door are arranged above and below the front end of the furnace body; a lifting assembly provided on the furnace body, used to drive the first furnace door and the second furnace door to rise or fall to open or close the furnace chamber; a guide assembly connected between the furnace body and the first furnace door and the second furnace door; The guide assembly is used to guide the rising or falling of the first furnace door and the second furnace door.

[0006] Preferably, the guide assembly comprises a guide groove, a first guide column and a second guide column. The guide groove has two, both of which are arranged on the left and right side walls of the front end of the furnace body, and the guide groove comprises a first vertical section, a second vertical section, an upper connecting section, a lower connecting section, a first intermediate connecting section and a second intermediate connecting section. The first vertical section and the second vertical section are spaced apart and parallel to each other, the upper end of the first vertical section is higher than the upper end of the second vertical section, and the lower end of the first vertical section is lower than the lower end of the second vertical section. The upper connecting section is connected between the upper end of the first vertical section and the upper end of the second vertical section, and the lower connecting section is connected between the lower end of the first vertical section and the lower end of the second vertical section. The lower connecting section and the upper connecting section are parallel to each other, the first intermediate connecting section and the second intermediate connecting section are parallel to the upper connecting section, and the first intermediate connecting section and the second intermediate connecting section are connected between the first vertical section and the second vertical section from top to bottom. The side of the second vertical section away from the first vertical section is provided with a first inclined groove, a second inclined groove, a third inclined groove and a fourth inclined groove at equal intervals from top to bottom, and the first inclined groove, the second inclined groove, the third inclined groove and the fourth inclined groove are all inclined downward. A through groove is provided in the area enclosed by the first vertical section, the first intermediate connecting section, the second vertical section, the second inclined groove, the fourth inclined groove and the lower connecting section at equal intervals inwardly, and the through groove penetrates the side wall of the furnace body. The first guide column and the second guide column each have four, two of the first guide columns are arranged diagonally on the left and right sides of the first furnace door, the other two of the first guide columns are arranged diagonally on the left and right sides of the second furnace door, two of the second guide columns are arranged diagonally and slidably on the left and right sides of the first furnace door, and the other two of the second guide columns are arranged diagonally and slidably on the left and right sides of the second furnace door, and the center lines of the two first guide columns and the center lines of the two second guide columns intersect each other. The first guide column is slidably connected in the guide groove, and the second guide column is slidably connected in the through groove, and the second guide column penetrates out of the through groove.

[0007] Preferably, the first guide column comprises a center sleeve, a support wheel, a sliding ring, a sliding rod, a spiral guide column and a first elastic member. The center sleeve is rotatably arranged on the side wall of the first furnace body and the second furnace body. The support wheel has a plurality of support wheels which are arranged at equal intervals in a circumferential direction around the axis of the center sleeve. The sliding rod is coaxially and slidably connected inside the center sleeve. The first elastic member is sleeved on the outside of the sliding rod, and the two ends of the first elastic member are fixedly connected with the center sleeve and the sliding ring respectively. The first elastic member is used to move the sliding rod away from the center sleeve. The sliding ring is coaxially arranged outside the sliding rod. The spiral guide column is arranged outside the sliding ring. A spiral guide groove is arranged on the inner wall of the center sleeve, and the spiral guide column is slidably connected in the spiral guide groove. The spiral guide groove is configured such that when the sliding rod reciprocally moves along its axis, the center sleeve can rotate in a circumferential direction around its axis under the guidance of the spiral guide groove.

[0008] Preferably, the middle position of the upper connecting section is provided with an inner groove; When the sliding rod moves to a position corresponding to the position of the inner groove, under the action of the first elastic member, the sliding rod moves along its axis to abut against the bottom of the inner groove, thereby causing the central sleeve to rotate around its axis by a preset angle.

[0009] Preferably, the slopes of the first inclined groove and the second inclined groove are the same, the slopes of the third inclined groove and the fourth inclined groove are the same, and the slope of the first inclined groove is greater than the slope of the third inclined groove.

[0010] Preferably, the upper surface of the first furnace door is provided with an upper clamp on the front side, and the lower surface of the first furnace door is provided with a lower clamp on the rear side. The outer dimensions of the lower clamp and the upper clamp are the same. The first furnace door and the second furnace door are the same in structure.

[0011] Preferably, the lifting assembly includes a first lifting motor, a first lifting shaft, first lifting wire rollers, and first lifting steel cables. The first lifting motor is arranged at the top of the furnace body. The first lifting shaft is fixedly connected to the output shaft of the first lifting motor. The first lifting wire rollers are two in number and are respectively sleeved on the two ends of the first lifting shaft. The first lifting wire rollers can rotate synchronously with the first lifting shaft and can move relatively. The first lifting steel cables are two in number. One end of each of the first lifting steel cables is wound around a corresponding first lifting wire roller. The other ends of the first lifting steel cables are arranged outside the two second guide columns corresponding to the first furnace door.

[0012] Preferably, the lifting assembly further includes first linear drives and a first sliding frame. The first linear drives are two in number and are respectively arranged at the left and right sides of the top of the furnace body. The first sliding frame is two in number and is respectively arranged at the extension ends of the two first linear drives. The first sliding frame is sleeved outside the first lifting shaft, and the first sliding member can move relatively and rotate relatively with the first lifting shaft.

[0013] Preferably, the lifting assembly further includes a second lifting motor, a second lifting shaft, second lifting wire rollers, and second lifting steel cables. The second lifting motor is arranged at the top of the furnace body. The second lifting shaft is fixedly connected to the output shaft of the second lifting motor. The second lifting wire rollers are two in number and are respectively sleeved on the two ends of the second lifting shaft. The second lifting wire rollers can rotate synchronously with the second lifting shaft and can move relatively. The second steel cables are two in number. One end of each of the second steel cables is wound around a corresponding second lifting wire roller. The other ends of the two second steel cables are arranged outside the two second guide columns corresponding to the second furnace door.

[0014] Preferably, the lifting assembly further comprises two second linear driving members and two second sliding frames, the two second linear driving members are respectively arranged at the left and right sides of the top of the furnace body, and the two second sliding frames are respectively arranged at the telescopic ends of the two second linear driving members, the second sliding frame is sleeved outside the second lifting shaft, and the second sliding member and the second lifting shaft can relatively move and relatively rotate.

[0015] The beneficial effects of the present application are: The present application sets the lifting assembly, the guide assembly, the first furnace door and the second furnace door, under the guiding effect of the guide assembly, the first furnace door and the second furnace door are vertically moved under the driving effect of the lifting assembly, compared with the prior art, by dividing the furnace door into two parts, when the furnace cavity needs to be opened, the required rising height of the first furnace door and the second furnace door is only half of the rising height of the furnace door in the prior art, so as to save the space reserved for opening the furnace door, which is beneficial to the transportation and assembly of the box type resistance heating furnace, in addition, the up and down positions of the first furnace door and the second furnace door are transposed each time the furnace cavity is opened, which can reduce the pressure loss of the first furnace door and the second furnace door, so as to prolong the service life of the first furnace door and the second furnace door. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole schematic view of the box type resistance heating furnace of the present application; Figure 2 It is a front view of the box type resistance heating furnace of the present application; Figure 3 It is a front view of the box type resistance heating furnace of the present application; Figure 1 It is a schematic view of the structure enlarged at A in the figure; Figure 4 It is a front view of the box type resistance heating furnace of the present application; Figure 3 It is a schematic view of the structure enlarged at B in the figure; Figure 5 It is a structural schematic view of the first furnace door in the box type resistance heating furnace of the present application; Figure 6 It is a sectional view of the box type resistance heating furnace of the present application; Figure 7 It is a sectional view of the box type resistance heating furnace of the present application; Figure 6 It is a schematic view of the structure enlarged at C in the figure; Figure 8 It is a front view of the furnace body in the box type resistance heating furnace of the present application; Figure 9 It is a front view of the furnace body in the box type resistance heating furnace of the present application; Figure 8 It is a sectional view of the furnace body in the box type resistance heating furnace of the present application; Figure 10 It is a sectional view of the furnace body in the box type resistance heating furnace of the present application; Figure 9 It is a schematic view of the structure enlarged at E in the figure; Figure 11 It is a schematic view of the initial position of the first guide column and the second guide column in the box type resistance heating furnace of the present application; Figure 12 It is the external structure schematic view of the second guide column in a box type resistance heating furnace of the present application; Figure 13 It is the half cut axial side view of the second guide column in a box type resistance heating furnace of the present application; Figure 14 It is the connection structure schematic view of the first sliding frame in a box type resistance heating furnace of the present application; Figure 15 It is the connection structure schematic view of the second sliding frame in a box type resistance heating furnace of the present application.

[0017] Wherein: 100, furnace body; 110, furnace cavity; 210, first furnace door; 211, upper clamping port; 212, lower clamping port; 220, second furnace door; 300, lifting assembly; 310, first lifting motor; 320, first lifting shaft; 330, first lifting wire roller; 340, first lifting steel cable; 350, second lifting motor; 360, second lifting shaft; 370, second lifting wire roller; 380, second lifting steel cable; 391, first linear drive; 3911, first adjustment motor; 3912, first driving bevel gear; 3913, first driven bevel gear; 3914, first bidirectional screw rod; 392, first sliding frame; 393, second linear drive; 3931, second adjustment motor; 3932, second driving bevel gear; 3933, second driven bevel gear; 3934, second bidirectional screw rod; 394, second sliding frame; 400, guide assembly; 410, guide groove; 440, first guide column; 450, second guide column; 411, first vertical section; 412, second vertical section; 413, upper connecting section; 4131, inner recess; 414, lower connecting section; 415, first intermediate connecting section; 416, second intermediate connecting section; 418, through groove; 4171, first inclined groove; 4172, second inclined groove; 4173, third inclined groove; 4174, fourth inclined groove; 441, center sleeve; 4411, spiral guide groove; 442, support wheel; 443, sliding ring; 444, sliding rod; 445, spiral guide column; 446, first elastic member. DETAILED DESCRIPTION

[0018] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0019] The numbers of components used herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The "connection" and "coupling" of the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0020] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0021] As shown in Figures 1 to 15 A box-type resistance heating furnace includes a furnace body 100, a furnace door, a lifting assembly 300 and a guide assembly 400. The furnace body 100 has a furnace cavity 110 formed by extending inwardly at the front end thereof. The furnace door includes a first furnace door 210 and a second furnace door 220, which are arranged at the front end of the furnace body 100 in an up-down manner. The lifting assembly 300 is arranged on the furnace body 100 and is used to drive the first furnace door 210 and the second furnace door 220 to ascend or descend, so as to open or close the furnace cavity 110. The guide assembly 400 is connected between the furnace body 100 and the first furnace door 210 and the second furnace door 220, and is used to guide the ascending or descending of the first furnace door 210 and the second furnace door 220.

[0022] In the initial state, the first furnace door 210 is located at the upper part of the furnace body 100, and the second furnace door 220 is located at the lower part of the furnace body 100. When the material (for example, ceramic or metal) needs to be heat treated, the worker first opens the furnace door and then puts the heat-treated material into the furnace cavity 110. Specifically, the worker starts the lifting assembly 300, and under the guidance of the guide assembly 400, the lifting assembly 300 first drives the first furnace door 210 to descend, so that the upper area of the furnace cavity 110 is opened. At this time, the worker can put the material into the upper part of the furnace cavity 110. Next, the first furnace door 210 and the second furnace door 220 are driven to rise by the lifting assembly 300, so that the lower area of the furnace cavity 110 is opened. At this time, the worker can put the material into the lower part of the furnace cavity 110. Compared with the prior art, by dividing the furnace door into two parts, when the furnace cavity 110 needs to be opened, the rising height of the first furnace door 210 and the second furnace door 220 is only half of the rising height of the furnace door in the prior art. Therefore, the space reserved for opening the furnace door can be saved, which is beneficial to the transportation and assembly of the box-type resistance heating furnace. After the material is completely put into the furnace cavity 110, the first furnace door 210 is driven to descend by the lifting assembly 300. At this time, the up-down positions of the first furnace door 210 and the second furnace door 220 are adjusted. Compared with the positions of the first furnace door 210 and the second furnace door 220 that cannot be adjusted, the up-down positions of the first furnace door 210 and the second furnace door 220 are adjusted every time the furnace cavity 110 is opened. Therefore, the pressure loss of the first furnace door 210 and the second furnace door 220 can be reduced, so as to prolong the service life of the first furnace door 210 and the second furnace door 220.

[0023] When the material in the furnace cavity 110 needs to be taken out, similarly, the first furnace door 210 is first driven to descend by the lifting assembly 300, so that the upper part of the furnace cavity 110 is opened. Then, the first furnace door 210 and the second furnace door 220 are synchronously driven to rise by the lifting assembly 300, so that the lower part of the furnace cavity 110 is opened. Finally, the first furnace door 210 is controlled to descend by the lifting assembly 300. Therefore, the positions of the first furnace door 210 and the second furnace door 220 are adjusted again, and the first furnace door 210 and the second furnace door 220 are reset to the initial state.

[0024] In further embodiments, as Figures 9-11As shown, the guide assembly 400 includes guide grooves 410, first guide posts 440, and second guide posts 450. The guide grooves 410 are two, and both are arranged on the left and right side walls at the front end of the furnace body 100. The guide grooves 410 include first vertical sections 411, second vertical sections 412, upper connecting sections 413, lower connecting sections 414, first intermediate connecting sections 415, and second intermediate connecting sections 416. The first vertical sections 411 and the second vertical sections 412 are spaced apart front to back and parallel to each other. The upper end of the first vertical section 411 is higher than the upper end of the second vertical section 412, and the lower end of the first vertical section 411 is lower than the lower end of the second vertical section 412. The upper connecting section 413 is connected between the upper end of the first vertical section 411 and the upper end of the second vertical section 412, and the lower connecting section 414 is connected between the lower end of the first vertical section 411 and the lower end of the second vertical section 412. The lower connecting section 414 and the upper connecting section 413 are parallel to each other. The first intermediate connecting section 415 and the second intermediate connecting section 416 are parallel to the upper connecting section 413, and are spaced apart from top to bottom and connected between the first vertical section 411 and the second vertical section 412. The second vertical section 412 is spaced apart from the first vertical section 411 and has first inclined grooves 4171, second inclined grooves 4172, third inclined grooves 4173, and fourth inclined grooves 4174 arranged at equal intervals from top to bottom on one side away from the first vertical section 411. The first inclined grooves 4171, the second inclined grooves 4172, the third inclined grooves 4173, and the fourth inclined grooves 4174 all incline downward. A through groove 418 is arranged at equal intervals inwardly in a region enclosed by the first vertical section 411, the first intermediate connecting section 415, the second vertical section 412, the second inclined grooves 4172, the fourth inclined grooves 4174, and the lower connecting section 414. The through groove 418 penetrates the side wall of the furnace body 100. The first guide posts 440 and the second guide posts 450 are each four. Two of the first guide posts 440 are arranged diagonally on the left and right sides of the first furnace door 210, and the other two of the first guide posts 440 are arranged diagonally on the left and right sides of the second furnace door 220. Two of the second guide posts 450 are arranged diagonally and slidably on the left and right sides of the first furnace door 210, and the other two of the second guide posts 450 are arranged diagonally and slidably on the left and right sides of the second furnace door 220. The center points of the two first guide posts 440 and the center points of the two second guide posts 450 are crossed. The first guide posts 440 are slidably connected in the guide grooves 410, the second guide posts 450 are slidably connected in the through grooves 418, and the second guide posts 450 pass out of the through grooves 418. The end of the second guide posts 450 passing out of the through grooves 418 is connected to the lifting assembly 300.

[0025] In the initial state, the positions of the first guide posts 440 and the second guide posts 450 corresponding to the first furnace door 210 and the first guide posts 440 and the second guide posts 450 corresponding to the second furnace door 220 are as shown in Figure 11As shown, when the first furnace door 210 needs to be driven to descend, the lifting assembly 300 first pulls the first furnace door 210 to move upward by the second guide column 450 corresponding to the first furnace door 210, at this time the first guide column 440 corresponding to the first furnace door 210 is forced to move from the first inclined groove 4171 to the uppermost end of the upper connecting section 413, and the second guide column 450 corresponding to the first furnace door 210 is moved along the through groove 418 from the second inclined groove 4172 to the uppermost end of the first intermediate connecting section 415. Next, the lifting assembly 300 pulls the first furnace door 210 to move downward, at this time the first guide column 440 corresponding to the first furnace door 210 moves from the uppermost end of the upper connecting section 413 to the uppermost end of the second intermediate connecting section 416, and the second guide column 450 corresponding to the first furnace door 210 moves along the through groove 418 from the uppermost end of the first intermediate connecting section 415 to the uppermost end of the lower connecting section 414. At this time, the upper part of the furnace cavity 110 is opened, and the worker can put the material into the upper part of the furnace cavity 110. Next, the worker pulls the first furnace door 210 and the second furnace door 220 to move upward by the lifting assembly 300, so that the first guide column 440 corresponding to the first furnace door 210 moves to the uppermost end of the upper connecting section 413, and the second guide column 450 corresponding to the first furnace door 210 moves along the through groove 418 to the uppermost end of the first intermediate connecting section 415, so that the first guide column 440 corresponding to the second furnace door 220 moves from the third inclined groove 4173 to the lowermost end of the upper connecting section 413, and the second guide column 450 corresponding to the second furnace door 220 moves along the through groove 418 from the fourth inclined groove 4174 to the lowermost end of the first intermediate connecting section 415. At this time, the lower part of the furnace cavity 110 is opened, and the worker can put the material into the lower part of the furnace cavity 110. Next, the worker drives the first furnace door 210 to descend by the lifting assembly 300, specifically, the first guide column 440 corresponding to the first furnace door 210 moves from the uppermost end of the upper connecting section 413 to the third inclined groove 4173 through the first vertical section 411 and the second intermediate connecting section 416 in sequence, and the second guide column 450 corresponding to the first furnace door 210 moves along the through groove 418 from the uppermost end of the first intermediate connecting section 415 to the fourth inclined groove 4174 through the first vertical section 411 and the lower connecting section 414 in sequence. In this way, the up-down position exchange of the first furnace door 210 and the second furnace door 220 is completed. When the furnace cavity 110 needs to be opened again, the specific process is the same, and is not described herein.

[0026] It should be noted that, as shown in Figure 5 the upper surface of the first furnace door 210 is provided with an upper clamp 211, and the lower surface of the first furnace door 210 is provided with a lower clamp 212. The outer end surface of the lower clamp 212 and the upper clamp 211 is a triangular inclined surface. The first furnace door 210 and the second furnace door 220 have the same structure.

[0027] The upper and lower notches 211 and 212 are arranged to increase the sealing performance of the first and second furnace doors 210 and 220 after they are docked. The outer end surfaces of the lower and upper notches 212 and 211 are triangular bevels, which are arranged to guide the second guide column 450 to move from the second vertical section 412 to the second inclined groove 4172.

[0028] It can be understood that the first guide columns 440 are arranged diagonally on the first and second furnace doors 210 and 220 to guide the movement of the first and second furnace doors 210 and 220. The second guide columns 450 are arranged diagonally on the first and second furnace doors 210 and 220 to enable the lifting assembly 300 to pull the first and second furnace doors 210 and 220 to stably ascend or descend through the second guide columns 450 on both sides of the first and second furnace doors 210 and 220, thereby preventing the first and second furnace doors 210 and 220 from tilting during the ascending or descending process.

[0029] In further embodiments, as shown in Figure 7 、 Figure 12 and Figure 13 , the first guide column 440 includes a central sleeve 441, a plurality of support wheels 442, a sliding ring 443, a sliding rod 444, a helical guide column 445, and a first elastic member 446. The central sleeve 441 is rotationally arranged on the sidewall of the first and second furnace bodies 100. The plurality of support wheels 442 are rotationally arranged on the central sleeve 441 at equal intervals in the circumferential direction of the axis of the central sleeve 441. The sliding rod 444 is coaxially and slidingly connected inside the central sleeve 441. The first elastic member 446 is arranged outside the sliding rod 444 and is fixedly connected to the central sleeve 441 and the sliding ring 443 at both ends thereof. The first elastic member 446 is arranged to move the sliding rod 444 away from the central sleeve 441. The sliding ring 443 is coaxially arranged outside the sliding rod 444. The helical guide column 445 is arranged outside the sliding ring 443. A helical guide groove 4411 is formed in the inner circumferential wall of the central sleeve 441. The helical guide groove 4411 includes a plurality of first helical grooves and a plurality of second helical grooves. The helical grooves of the first and second helical grooves are opposite in helical direction. The plurality of first and second helical grooves are alternately and slidingly connected around the axis of the central sleeve 441. Adjacent first and second helical grooves form a V-shaped structure with an opening facing one side of the axis of the central sleeve 441. The helical guide column 445 is slidingly connected in the helical guide groove 4411. The helical guide groove 4411 is configured to enable the central sleeve 441 to rotate in the circumferential direction around its axis under the guidance of the helical guide groove 4411 when the sliding rod 444 reciprocally moves along its axis.

[0030] It should be further noted that, asFigure 10 As shown, a middle position of the upper connecting section 413 is provided with an inner groove 4131, when the sliding rod 444 moves to a position corresponding to the position of the inner groove 4131, under the action of the first elastic member 446, the sliding rod 444 moves along its axis to abut against the bottom of the inner groove 4131, thereby causing the central sleeve 441 to rotate around its axis by a preset angle.

[0031] When the lifting assembly 300 pulls the first furnace door 210 or the second furnace door 220 to move to the position corresponding to the sliding rod 444 and the inner groove 4131 of the second guide column 450, under the action of the first elastic member 446, the sliding ring 443 and the sliding rod 444 move synchronously along their axes in the direction where the inner groove 4131 is located, until the end of the sliding rod 444 abuts against the bottom of the inner groove 4131, in the process of the sliding rod 444 moving along its axis, under the guiding cooperation of the spiral guide groove 4411 and the spiral guide column 445, the central sleeve 441 rotates around its axis by a preset angle, since the plurality of support wheels 442 are circumferentially and equidistantly arranged on the central sleeve 441, the central sleeve 441 drives the plurality of support wheels 442 to rotate synchronously by a preset angle, at this time, the positions of the plurality of support wheels 442 circumferentially arranged on the central sleeve 441 are switched, thereby preventing some or some of the support wheels 442 of the first guide column 440 from being damaged due to long-term excessive force.

[0032] Preferably, as shown in the drawings, Figure 12 Preferably, as shown in the drawings,

[0033] In further embodiments, as shown in the drawings, Figure 10 Preferably, the inclination of the first inclined groove 4171 is greater than the inclination of the third inclined groove 4173.

[0034] Such an arrangement is to enable the weight of the first furnace door 210 or the second furnace door 220 located at the upper part of the furnace cavity 110 to press on the second furnace door 220 or the first furnace door 210 at the lower part of the furnace cavity 110, thereby enhancing the connection tightness between the first furnace door 210 and the second furnace door 220.

[0035] In further embodiments, as shown in the drawings, Figures 1-4 and Figure 14As shown, the lifting assembly 300 comprises a first lifting motor 310, a first lifting shaft 320, two first lifting wire rollers 330 and two first lifting steel cables 340. The first lifting motor 310 is arranged at the top of the furnace body 100. The first lifting shaft 320 is fixedly connected with the output shaft of the first lifting motor 310. The two first lifting wire rollers 330 are sleeved on the two ends of the first lifting shaft 320 respectively. The first lifting wire rollers 330 can rotate synchronously with the first lifting shaft 320 and move relatively. The two first lifting steel cables 340 are wound on the corresponding first lifting wire rollers 330 at one end respectively. The other ends of the two first lifting steel cables 340 are arranged outside the two second guide columns 450 corresponding to the first furnace door 210.

[0036] When the first furnace door 210 needs to be driven to rise, the first lifting motor 310 is started. The first lifting motor 310 drives the first lifting shaft 320 to rotate. The first lifting shaft 320 drives the two first lifting wire rollers 330 at the two ends to rotate synchronously. The first lifting steel cables 340 are gradually wound on the first lifting wire rollers 330 through the rotation of the first lifting wire rollers 330. At this time, the first lifting steel cables 340 pull the second guide columns 450 corresponding to the first furnace door 210 to move upwards. At this time, the second guide columns 450 drive the first furnace door 210 to rise synchronously.

[0037] When the first furnace door 210 needs to be lowered, the first lifting motor 310 is reversely rotated. The first lifting motor 310 drives the first lifting shaft 320 to reversely rotate synchronously. The first lifting shaft 320 drives the two first lifting wire rollers 330 at the two ends to reversely rotate synchronously. At this time, the first lifting steel cables 340 drive the second guide columns 450 corresponding to the first furnace door 210 to move downwards. The second guide columns 450 drive the first furnace door 210 to descend synchronously.

[0038] In further embodiments, as shown in Figure 13 、 Figure 4 and Figure 15 As shown, the lifting assembly 300 further comprises a second lifting motor 350, a second lifting shaft 360, two second lifting wire rollers 370 and two second lifting steel cables 380. The second lifting motor 350 is arranged at the top of the furnace body 100. The second lifting shaft 360 is fixedly connected with the output shaft of the second lifting motor 350. The two second lifting wire rollers 370 are sleeved on the two ends of the second lifting shaft 360 respectively. The second lifting wire rollers 370 can rotate synchronously with the second lifting shaft 360 and move relatively. The two second lifting steel cables 380 are wound on the corresponding second lifting wire rollers 370 at one end respectively. The other ends of the two second lifting steel cables 380 are arranged outside the two second guide columns 450 corresponding to the second furnace door 220.

[0039] Similarly, when the second furnace door 220 needs to be driven to rise, the second lifting motor 350 is started, the second lifting motor 350 drives the second lifting shaft 360 to rotate, the second lifting shaft 360 drives the two second lifting wire rollers 370 at both ends thereof to rotate synchronously, the rotation of the second lifting wire rollers 370 gradually winds the second lifting steel cable 380 onto the second lifting wire rollers 370, the second lifting steel cable 380 pulls the second guide column 450 corresponding to the second furnace door 220 to move upward, and the second guide column 450 drives the second furnace door 220 to rise synchronously.

[0040] When the second furnace door 220 needs to be lowered, the second lifting motor 350 is reversely rotated, the second lifting motor 350 drives the second lifting shaft 360 to reversely rotate, the second lifting shaft 360 drives the two second lifting wire rollers 370 at both ends thereof to reversely rotate synchronously, the second lifting steel cable 380 drives the second guide column 450 corresponding to the second furnace door 220 to descend, and the second guide column 450 drives the second furnace door 220 to descend synchronously.

[0041] In order to prevent the first lifting steel cable 340 and the second lifting steel cable 380 from being entangled with each other in the process of rising or descending, in a further embodiment, as shown in Figure 3 、 Figure 4 、 Figure 14 and Figure 15 , the lifting assembly 300 further comprises a first linear drive 391 and a first sliding frame 392, the first linear drive 391 has two, in the embodiment, the first linear drive 391 is specifically a hydraulic rod, the two first linear drives 391 are respectively arranged at the left and right sides of the top of the furnace body 100, the first sliding frame 392 has two, the two first sliding frames 392 are respectively arranged at the telescopic ends of the two first linear drives 391, the first sliding frame 392 is sleeved outside the first lifting shaft 320, and the first sliding member and the first lifting shaft 320 can relatively move and relatively rotate, the lifting assembly 300 further comprises a second linear drive 393 and a second sliding frame 394, the second linear drive 393 has two, the second linear drive 393 is specifically a hydraulic rod, the two second linear drives 393 are respectively arranged at the left and right sides of the top of the furnace body 100, the second sliding frame 394 has two, the two second sliding frames 394 are respectively arranged at the telescopic ends of the two second linear drives 393, and the second sliding frame 394 is sleeved outside the second lifting shaft 360, and the second sliding member and the second lifting shaft 360 can relatively move and relatively rotate.

[0042] Before moving the first furnace door 210, the staff first starts the first linear drive 391, pushes the two first sliding frames 392 away from each other to the first preset position through the first linear drive 391, and the first sliding frame 392 drives the first lifting line roller 330 to move synchronously, and the first lifting line roller 330 drives the first lifting steel cable 340 to move synchronously. At this time, the first lifting steel cable 340 and the second lifting steel cable 380 are staggered with each other in the left-right direction of the furnace body 100, so that the first lifting steel cable 340 and the second lifting steel cable 380 will not be entangled with each other. Next, the first lifting motor 310 is started again, and the first furnace door 210 is lifted or lowered by the first lifting motor 310. When the movement of the first furnace door 210 is completed, the first linear drive 391 is started again, and the two first sliding frames 392 are pushed back to the initial position in the reverse direction through the first linear drive 391.

[0043] Similarly, before moving the second furnace door 220, the staff first starts the second linear drive 393, pushes the two second sliding frames 394 away from each other to the first preset position through the second linear drive 393, and the second sliding frame 394 drives the second lifting line roller 370 to move synchronously, and the second lifting line roller 370 drives the second lifting steel cable 380 to move synchronously. At this time, the first lifting steel cable 340 and the second lifting steel cable 380 are staggered with each other in the left-right direction of the furnace body 100, so that the first lifting steel cable 340 and the second lifting steel cable 380 will not be entangled with each other. Next, the second lifting motor 350 is started again, and the second furnace door 220 is lifted or lowered by the second lifting motor 350. When the movement of the second furnace door 220 is completed, the second linear drive 393 is started again, and the two second sliding frames 394 are pushed back to the initial position in the reverse direction through the second linear drive 393.

[0044] In other embodiments, as Figure 3 and Figure 4As shown, the first linear drive 391 comprises a first adjusting motor 3911, a first driving bevel gear 3912, a first driven bevel gear 3913 and a first bidirectional screw 3914, the first adjusting motor 3911 is arranged at the top of the furnace body 100, the first driving bevel gear 3912 is fixedly connected with the output shaft of the first adjusting motor 3911, the first bidirectional screw 3914 is rotatably arranged at the top of the furnace body 100, the first driven bevel gear 3913 is arranged at one end of the first bidirectional screw 3914, the first driving bevel gear 3912 and the first driven bevel gear 3913 are in mesh with each other, and the first bidirectional screw 3914 is threadedly connected with the first sliding frame 392. The second linear drive 393 comprises a second adjusting motor 3931, a second driving bevel gear 3932, a second driven bevel gear 3933 and a second bidirectional screw 3934, the second adjusting motor 3931 is arranged at the top of the furnace body 100, the second driving bevel gear 3932 is fixedly connected with the output shaft of the second adjusting motor 3931, the second bidirectional screw 3934 is rotatably arranged at the top of the furnace body 100, and the second bidirectional screw 3934 is threadedly connected with the second sliding frame 394.

[0045] When the two first sliding frames 392 need to move away from each other, the first adjusting motor 3911 is started, the first driving bevel gear 3912 is driven to rotate by the first adjusting motor 3911, the first driven bevel gear 3913 is driven to rotate by the first driving bevel gear 3912, the first bidirectional screw 3914 is driven to rotate by the first driven bevel gear 3913, and the two first sliding frames 392 are driven to move away from each other to a first preset position by the rotation of the first bidirectional screw 3914 through the threaded connection.

[0046] When the two first sliding frames 392 need to move away from each other, the first adjusting motor 3911 is started, the first driving bevel gear 3912 is driven to rotate by the first adjusting motor 3911, the first driven bevel gear 3913 is driven to rotate by the first driving bevel gear 3912, the first bidirectional screw 3914 is driven to rotate by the first driven bevel gear 3913, and the two first sliding frames 392 are driven to move away from each other to a first preset position by the rotation of the first bidirectional screw 3914 through the threaded connection.

[0047] When the two first sliding frames 392 need to move away from each other, the first adjusting motor 3911 is started, the first driving bevel gear 3912 is driven to rotate by the first adjusting motor 3911, the first driven bevel gear 3913 is driven to rotate by the first driving bevel gear 3912, the first bidirectional screw 3914 is driven to rotate by the first driven bevel gear 3913, and the two first sliding frames 392 are driven to move away from each other to a first preset position by the rotation of the first bidirectional screw 3914 through the threaded connection.

[0048] When the two second sliding frames 394 need to be close to each other, the second adjusting motor 3931 is reversed, the second driving bevel gear 3932 is reversed by the second adjusting motor 3931, the second driven bevel gear 3933 is reversed by the second driving bevel gear 3932, the second bidirectional screw 3934 is reversed by the second driven bevel gear 3933, and the two second sliding frames 394 are reset to the initial position by the screw thread transmission of the second bidirectional screw 3934.

[0049] The technical features of the above embodiments can be combined in any manner. To make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations do not contradict each other, they should be considered as falling within the scope of the present disclosure.

[0050] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as limiting the scope of the present application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A box-type resistance heating furnace, characterized by comprising: The utility model relates to a stove, including: The furnace body, the front end extends to form the furnace chamber; The furnace door is divided into first furnace door and second furnace door, and first furnace door and second furnace door are arranged on the front end of furnace body upside and down; Lifting assembly is equipped in the furnace body, is used for driving first furnace door, second furnace door rises or falls to open or close furnace chamber; The guide assembly is connected between the furnace body and the first furnace door and the second furnace door; The guide assembly is used for guiding the rising or falling of the first furnace door and the second furnace door.

2. A box-type resistance heating furnace according to claim 1, wherein The guide assembly includes a guide slot, a first guide column, and a second guide column. The guide slot has two, and the two guide slots are both arranged on the left and right side walls of the front end of the furnace body. The guide slot includes a first vertical section, a second vertical section, an upper connecting section, a lower connecting section, a first intermediate connecting section, and a second intermediate connecting section. The first vertical section and the second vertical section are spaced apart and parallel to each other. The upper end of the first vertical section is higher than the upper end of the second vertical section, and the lower end of the first vertical section is lower than the lower end of the second vertical section. The upper connecting section is connected between the upper end of the first vertical section and the upper end of the second vertical section. The lower connecting section is connected between the lower end of the first vertical section and the lower end of the second vertical section. The lower connecting section and the upper connecting section are parallel to each other. The first intermediate connecting section and the second intermediate connecting section are parallel to the upper connecting section. The first intermediate connecting section and the second intermediate connecting section are spaced apart and connected between the first vertical section and the second vertical section from top to bottom. The side of the second vertical section away from the first vertical section is equally spaced and has a first inclined slot, a second inclined slot, a third inclined slot, and a fourth inclined slot from top to bottom. The first inclined slot, the second inclined slot, the third inclined slot, and the fourth inclined slot are all inclined downward. A through slot is equally spaced and arranged inward in the area enclosed by the first vertical section, the first intermediate connecting section, the second vertical section, the second inclined slot, the fourth inclined slot, and the lower connecting section. The through slot penetrates the side wall of the furnace body. The first guide column and the second guide column each have four. Two of the first guide columns are arranged diagonally on the left and right sides of the first furnace door. The other two first guide columns are arranged diagonally on the left and right sides of the second furnace door. Two of the second guide columns are arranged diagonally and slidably on the left and right sides of the first furnace door. The other two second guide columns are arranged diagonally and slidably on the left and right sides of the second furnace door. The center points of the two first guide columns and the center points of the two second guide columns intersect each other. The first guide column is slidably connected in the guide slot, and the second guide column is slidably connected in the through slot. The second guide column penetrates out of the through slot.

3. A box-type resistance heating furnace according to claim 2, wherein The first guide column includes a center sleeve, a support wheel, a sliding ring, a sliding rod, a spiral guide column, and a first elastic member. The center sleeve is rotatably arranged on the side wall of the first furnace body and the second furnace body. The support wheel has multiple support wheels that are equally spaced and rotatably arranged on the center sleeve around the axis of the center sleeve. The sliding rod is coaxially and slidably connected inside the center sleeve. The first elastic member is sleeved on the outside of the sliding rod, and the two ends of the first elastic member are fixedly connected with the center sleeve and the sliding ring, respectively. The first elastic member is used to move the sliding rod away from the center sleeve. The sliding ring is coaxially arranged on the outside of the sliding rod. The spiral guide column is arranged on the outside of the sliding ring. A spiral guide slot is arranged on the inner circumferential wall of the center sleeve. The spiral guide column is slidably connected in the spiral guide slot. The helical guide groove is configured to enable the central sleeve to rotate circumferentially about its axis under the guidance of the helical guide groove when the sliding rod reciprocates along its axis.

4. A box-type resistance heating furnace according to claim 3, wherein An inner groove is formed in the middle of the upper connecting section. When the sliding rod moves to a position corresponding to the position of the inner groove, the sliding rod moves along its axis to abut against the bottom of the inner groove under the action of the first elastic member, thereby enabling the central sleeve to rotate about its axis by a preset angle.

5. A box-type resistance heating furnace according to claim 2, wherein The first inclined groove and the second inclined groove have the same inclination, the third inclined groove and the fourth inclined groove have the same inclination, and the inclination of the first inclined groove is greater than that of the third inclined groove.

6. A box-type resistance heating furnace according to claim 1, wherein An upper clamping opening is formed in the front side of the upper surface of the first furnace door, and a lower clamping opening is formed in the rear side of the lower surface of the first furnace door, the outer dimensions of the lower clamping opening and the upper clamping opening being the same. The first furnace door and the second furnace door have the same structure.

7. A box-type resistance heating furnace according to claim 1, wherein The lifting assembly comprises a first lifting motor, a first lifting shaft, first lifting wire rollers and first lifting steel cables. The first lifting motor is arranged at the top of the furnace body. The first lifting shaft is fixedly connected with the output shaft of the first lifting motor. The first lifting wire rollers are arranged at the two ends of the first lifting shaft. The first lifting wire rollers can rotate synchronously and move relatively with the first lifting shaft. The first lifting steel cables are arranged outside the two second guide columns corresponding to the first furnace door.

8. A box-type resistance heating furnace according to claim 7, wherein The lifting assembly further comprises first linear drives and first sliding frames. The first linear drives are arranged at the left and right sides of the top of the furnace body. The first sliding frames are arranged at the extension ends of the first linear drives. The first sliding frames are arranged outside the first lifting shaft. The first sliding frames can move relatively and rotate relatively with the first lifting shaft.

9. A box-type resistance heating furnace according to claim 1, wherein The lifting assembly further comprises a second lifting motor, a second lifting shaft, second lifting wire rollers and second lifting steel cables. The second lifting motor is arranged at the top of the furnace body. The second lifting shaft is fixedly connected with the output shaft of the second lifting motor. The second lifting wire rollers are arranged at the two ends of the second lifting shaft. The second lifting wire rollers can rotate synchronously and move relatively with the second lifting shaft. The second steel cables are arranged outside the two second guide columns corresponding to the second furnace door.

10. A box-type resistance heating furnace according to claim 9, wherein The lifting assembly further comprises second linear drives and second sliding frames. The second linear drives are arranged at the left and right sides of the top of the furnace body. The second sliding frames are arranged at the extension ends of the second linear drives. The second sliding frames are arranged outside the second lifting shaft. The second sliding frames can move relatively and rotate relatively with the second lifting shaft.

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