A sequential lifting system for furnace body and its control method

Abstract

The present invention discloses a furnace body sequential lifting system, wherein a first limit switch and a first contact block are provided between a first furnace body and a frame; a second limit switch and a second contact block are provided between a second furnace body and a frame; a group of intermediate switch groups are fixedly installed between the first furnace body and an adjacent intermediate furnace body, between two adjacent intermediate furnace bodies, and between the second furnace body and an adjacent intermediate furnace body; the first module controls the rise of the first furnace body through the first limit switch, the second module controls the descent of the second furnace body through the second limit switch, and each intermediate module controls the descent of the first furnace body or the intermediate furnace body installed with the intermediate limit switch and the rise of the next intermediate furnace body or the second furnace body through the corresponding intermediate limit switch. Compared with the existing furnace body lifting system, the furnace body sequential lifting system only has one limit switch between two adjacent furnace bodies, thereby reducing the cost.

Description

Technical Field

[0001] The invention relates to the technical field of glass heating furnace bodies, in particular to a furnace body sequential lifting system and a control method thereof. Background Art

[0002] The principle of physical glass tempering is to heat the glass to a suitable temperature and then cool it quickly, causing the glass surface to shrink sharply and generate compressive stress. The middle layer of the glass cools more slowly and has no time to shrink, so tensile stress is formed, giving the glass a higher strength. Generally speaking, the higher the cooling intensity, the greater the glass strength. In the glass tempering process, heating and cooling are the most critical and important links, so a furnace is required. The glass is transported in the furnace by rollers and is heated or cooled during transportation.

[0003] In order to facilitate installation and / or maintenance, the current furnace body adopts a segmented design, which divides the furnace body on the production line into several relatively short furnace body sections. Each furnace body section can be installed and / or maintained separately, thereby reducing the difficulty of installation and / or maintenance. During installation and / or maintenance, the furnace body section is lifted to separate the furnace body and the roller shaft, and then the staff can install or maintain the roller shaft and the components inside the furnace body. Each furnace body section is automatically raised and lowered through a travel switch. Figure 1 As shown, the current furnace lifting system installs an upper limit travel switch SQ1 and a lower limit travel switch SQ2 on one side of each furnace section to control the lifting limit of the furnace section. However, this design requires two travel switches to be installed on each furnace section, which increases the cost. Summary of the invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to propose a furnace body sequential lifting system and a control method thereof. Compared with the existing furnace body lifting system, the furnace body sequential lifting system only has one limit switch between two adjacent furnace bodies, thereby reducing the cost.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: a furnace body sequential lifting system, including a furnace body group, a limit switch group, a contact block group and a lifting circuit;

[0006] The furnace body group includes a first furnace body, a second furnace body and a plurality of intermediate furnace bodies, wherein the first furnace body is arranged at the head end of the frame, the second furnace body is arranged at the end of the frame, and the plurality of intermediate furnace bodies are arranged in sequence between the first furnace body and the second furnace body in a horizontal direction, and the first furnace body, the second furnace body and the intermediate furnace body all slide up and down independently in a vertical direction;

[0007] The limit switch group includes a first limit switch, a second limit switch and a plurality of intermediate limit switches, and correspondingly, the contact block group includes a first contact block, a second contact block and a plurality of intermediate contact blocks;

[0008] A first limit switch and a first contact block are provided between the first furnace body and the frame, the first limit switch or the first contact block slides up and down following the first furnace body, and in a non-maintenance state, the first limit switch and the first contact block are separated and the distance between them is equal to the lifting stroke of the first furnace body;

[0009] A second limit switch and a second contact block are provided between the second furnace body and the frame, the second limit switch or the second contact block slides up and down following the second furnace body, and in the maintenance state, the second limit switch and the second contact block are separated and the distance between them is equal to the lifting stroke of the second furnace body;

[0010] A set of intermediate switch groups are fixedly installed between the first furnace body and the adjacent intermediate furnace body, between two adjacent intermediate furnace bodies, and between the second furnace body and the adjacent intermediate furnace body. The intermediate switch group consists of an intermediate limit switch and an intermediate contact block, and all the intermediate limit switches and intermediate contacts are in the same horizontal plane;

[0011] The lifting circuit includes a first module, a second module and multiple intermediate modules. The first module controls the rise of the first furnace body through a first limit switch, and the second module controls the descent of the second furnace body through a second limit switch. Each intermediate module controls the descent of the first furnace body or the intermediate furnace body installed with the intermediate limit switch and the rise of the subsequent intermediate furnace body or the second furnace body through the corresponding intermediate limit switch.

[0012] Preferably, the lifting circuit further comprises a descending relay KA1, an ascending relay KA2, an automatic ascending button SB10 and an automatic descending button SB09, the coil of the descending relay KA1 and the automatic descending button SB09 are connected in series, and the coil of the ascending relay KA2 and the automatic ascending button SB10 are connected in series;

[0013] The descending relay KA1 is provided with a first descending contact KA11 and a plurality of intermediate descending contacts KA12, and the ascending relay KA2 is provided with a first ascending contact KA21 and a plurality of intermediate ascending contacts KA22;

[0014] The first limit switch is connected in series with the first rising contact KA21;

[0015] The second limit switch is connected in series with the first descending contact KA11;

[0016] Each of the intermediate modules is provided with an intermediate rising contact KA22 and an intermediate falling contact KA12 connected in parallel with each other, so that the intermediate module forms an rising circuit and a falling circuit, and the intermediate limit switch is connected in series with the intermediate rising contact KA22 and the intermediate falling contact KA12 respectively.

[0017] Preferably, the lifting circuit further includes a plurality of interlocking circuits;

[0018] An interlocking circuit is connected in parallel between the first module and the descending circuit of the middle module corresponding to the adjacent middle furnace body;

[0019] An interlocking circuit is also connected in parallel between the second module and the rising circuit of the middle module corresponding to the adjacent middle furnace body;

[0020] An interlocking circuit is also connected in parallel between the rising circuit and the falling circuit corresponding to the same intermediate furnace body between the two intermediate modules.

[0021] Preferably, the first module is further provided with an independent rising switch SB02 connected in parallel with the first rising contact KA21;

[0022] The rising circuit of the intermediate module is also provided with an independent rising switch SB03 connected in parallel with the intermediate rising contact KA22;

[0023] The second module is also provided with an independent down switch SB01 connected in parallel with the first down contact KA11;

[0024] The descending circuit of the intermediate module is also provided with an independent descending switch SB04 connected in parallel with the intermediate descending contact KA12;

[0025] The independent rising switches SB02 and SB03 are both independently turned on and off, and the independent falling switches SB01 and SB04 are both independently turned on and off.

[0026] Preferably, the first module, the second module and the middle module are each electrically connected to the power supply terminal via a thermal relay FR.

[0027] Preferably, a first mounting column is provided at the head end of the frame, the first limit switch is provided on the first mounting column, the first contact block is fixed to the lower end of the outer wall of the first furnace body facing the first mounting column and slides up and down with the first furnace body, and the first limit switch is located above the first contact block;

[0028] A second mounting column is provided at the end of the frame, the second limit switch is arranged on the second mounting column, the second contact block is fixed to the upper end of the outer wall of the second furnace body facing the second mounting column and slides up and down with the second furnace body, and the second limit switch is located below the second contact block.

[0029] Preferably, a first mounting column is provided at the head end of the frame, the first contact block is provided on the first mounting column, the first limit switch is fixed to the lower end of the outer wall of the first furnace body facing the first mounting column and slides up and down with the first furnace body, and the first contact block is located above the first limit switch;

[0030] A second mounting column is provided at the end of the frame, the second contact block is arranged on the second mounting column, the second limit switch is fixed to the upper end of the outer wall of the second furnace body facing the second mounting column and slides up and down with the second furnace body, and the second contact block is located below the second limit switch.

[0031] Preferably, adjacent side walls of two adjacent furnace bodies of the furnace body group are inclined upward, thereby forming an inclined gap.

[0032] Preferably, the contact block group further includes an adjustment mechanism, and the first contact block, the second contact block and the middle contact block are each provided with an adjustment mechanism, and the adjustment mechanism is used to adjust the installation height of the corresponding first contact block, the second contact block or the middle contact block.

[0033] A control method for a furnace sequential lifting system, comprising:

[0034] Ascent process:

[0035] Step A: Press the automatic rising button SB10 to turn on the rising relay KA2, so that the first rising contact KA21 and all the middle rising contacts KA22 are connected;

[0036] Step B: the first modules are connected, and the first furnace body starts to rise;

[0037] Step C: the middle limit switch of the middle furnace body located behind the first furnace body is closed, and the middle furnace body starts to rise;

[0038] Step D: The remaining intermediate furnace bodies rise in sequence;

[0039] Step E: After the first furnace body reaches the top, the first limit switch is disconnected, and the first furnace body stops rising;

[0040] Step F: After the remaining intermediate furnace bodies reach the top, the corresponding intermediate limit switches are disconnected in sequence, and the remaining intermediate furnace bodies stop rising in sequence; then, after the second furnace body rises to the top, the second limit switch is disconnected, and the second furnace body stops rising, thus completing the rising of the entire furnace body group;

[0041] Descending process:

[0042] Step G: Press the automatic descending button SB09 to turn on the descending relay KA1, so that the first descending contact KA11 and all the middle descending contacts KA12 are connected;

[0043] Step H: the second module is connected, and the second furnace body begins to descend;

[0044] Step I: the middle limit switch of the middle furnace body located in front of the second furnace body is closed, and the middle furnace body starts to descend;

[0045] Step J: the remaining intermediate furnace bodies descend in sequence;

[0046] Step K: After the second furnace body reaches the bottom, the second limit switch is disconnected, and the second furnace body stops descending;

[0047] Step L: After the remaining intermediate furnace bodies reach the bottom, the corresponding intermediate limit switches are disconnected in sequence, and the remaining intermediate furnace bodies stop descending in sequence; then after the first furnace body descends to the bottom, the first limit switch is disconnected, and the first furnace body stops descending, completing the descent of the entire furnace body group.

[0048] Beneficial effects of the present invention: The furnace body sequential lifting system utilizes the limit switch group and the contact block group to cooperate to achieve the effect of automatic lifting of the furnace body group. Compared with the existing furnace body lifting system, the furnace body sequential lifting system is provided with only one intermediate limit switch between two adjacent furnace bodies of the furnace body group, and the intermediate limit switch controls the rise of one furnace body and the fall of the next furnace body, thereby reducing the number of limit switches used and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural schematic diagram of the prior art;

[0050] Figure 2 It is a schematic structural diagram of an embodiment of the present invention;

[0051] Figure 3 yes Figure 2 An enlarged schematic diagram of the structure of the portion circled by the dotted circle A in the illustrated embodiment;

[0052] Figure 4 yes Figure 2 An enlarged schematic diagram of the structure of the portion circled by the dotted circle B in the illustrated embodiment;

[0053] Figure 5 yes Figure 2 An enlarged schematic diagram of the structure of the portion circled by the dotted circle C in the illustrated embodiment;

[0054] Figure 6 is a lifting and lowering circuit of an embodiment of the present invention;

[0055] Figure 7 is a control circuit of a down switch and an up switch in one embodiment of the present invention;

[0056] Figure 8 is a schematic structural diagram of a furnace group located at the bottom in one embodiment of the present invention;

[0057] Fig. 9 is a schematic structural diagram of a furnace group located at the top in one embodiment of the present invention;

[0058] Fig.10 is a schematic structural diagram of a furnace group located at the bottom in one embodiment of the present invention;

[0059] Wherein: 1 furnace body group; 2 limit switch group; 3 contact block group; 4 first mounting column; 5 second mounting column; 6 gap; 11 first furnace body; 12 second furnace body; 13 middle furnace body; 21 first limit switch; 22 second limit switch; 23 middle limit switch; 31 first contact block; 32 second contact block; 33 middle contact block; 41 first module; 42 second module; 43 middle module; 44 rising circuit; 45 falling circuit; 46 interlocking circuit; falling relay KA1; rising relay KA2; automatic rising button Button SB10; automatic descending button SB09; first descending contact KA11; middle descending contact KA12; first ascending contact KA21; middle ascending contact KA22; independent ascending switch SB02; independent ascending switch SB03; independent descending switch SB01; independent descending switch SB04; thermal relay FR; interlock relay KM1; relay normally closed contact KM11; interlock relay KM2; electrical normally closed contact KM21; upper limit travel switch SQ1; lower limit travel switch SQ2. DETAILED DESCRIPTION

[0060] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0061] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] like Figure 2-10 As shown, a furnace body sequential lifting system includes a furnace body group 1, a limit switch group 2, a contact block group 3 and a lifting circuit;

[0065] The furnace body group 1 comprises a first furnace body 11, a second furnace body 12 and a plurality of intermediate furnace bodies 13, wherein the first furnace body 11 is arranged at the head end of the frame, the second furnace body 12 is arranged at the end of the frame, and the plurality of intermediate furnace bodies 13 are arranged in sequence between the first furnace body 11 and the second furnace body 12 in a horizontal direction, and the first furnace body 11, the second furnace body 12 and the intermediate furnace body 13 are all independently slid up and down in a vertical direction;

[0066] The limit switch group 2 includes a first limit switch 21, a second limit switch 22 and a plurality of intermediate limit switches 23, and correspondingly, the contact block group 3 includes a first contact block 31, a second contact block 32 and a plurality of intermediate contact blocks 33;

[0067] A first limit switch 21 and a first contact block 31 are provided between the first furnace body 11 and the frame. The first limit switch 21 or the first contact block 31 slides up and down following the first furnace body 11. In a non-maintenance state, the first limit switch 21 and the first contact block 31 are separated and the distance between them is equal to the lifting stroke of the first furnace body 11.

[0068] A second limit switch 22 and a second contact block 32 are provided between the second furnace body 12 and the frame. The second limit switch 22 or the second contact block 32 slides up and down following the second furnace body 12. In the maintenance state, the second limit switch 22 and the second contact block 32 are separated and the distance between them is equal to the lifting stroke of the second furnace body 12.

[0069] A set of intermediate switch groups are fixedly installed between the first furnace body 11 and the adjacent intermediate furnace body 13, between two adjacent intermediate furnace bodies 3, and between the second furnace body 12 and the adjacent intermediate furnace body 13. The intermediate switch group consists of an intermediate limit switch 23 and an intermediate contact block 33, and all the intermediate limit switches 23 and the intermediate contact blocks 33 are in the same horizontal plane.

[0070] The lifting circuit includes a first module 41, a second module 42 and multiple intermediate modules 43. The first module 41 controls the rise of the first furnace body 11 through the first limit switch 21, and the second module 42 controls the descent of the second furnace body 12 through the second limit switch 22. Each intermediate module 43 controls the descent of the first furnace body 11 or the intermediate furnace body 13 installed with the intermediate limit switch 23 and the rise of the subsequent intermediate furnace body 13 or the second furnace body 12 through the corresponding intermediate limit switch 23.

[0071] The furnace body sequential lifting system uses the limit switch group 2 and the contact block group 3 to cooperate with each other to achieve the effect of automatic lifting of the furnace body group 1. Compared with the existing furnace body lifting system, the furnace body sequential lifting system is provided with only one intermediate limit switch between two adjacent furnace bodies of the furnace body group 1, and the intermediate limit switch controls the rise of one furnace body and the fall of the subsequent furnace body, thereby reducing the number of limit switches used and reducing costs.

[0072] like Figure 2 As shown, the right side is the front, the left side is the rear, the frontmost furnace body is the first furnace body 11, and the rearmost furnace body is the second furnace body 12. The limit switches of the limit switch group 2 are all normally closed limit switches.

[0073] like Figure 6 , 8As shown in Figures 9 and 10, in the non-maintenance state, the furnace body group 1 is at the bottom of the furnace body sequential lifting system, only the first limit switch 21 of the first furnace body 11 is separated from the first contact block 31, the first limit switch 21 is in a closed state, the second limit switch 22 and the second contact block 32 are in contact and thus are in an open state, and the remaining limit switches of the limit switch group 2 are in contact with the corresponding contacts of the contact block group 3 and thus are in an open state.

[0074] When maintenance is needed, the first module 41 is connected, and the first furnace body 11 rises. At the same time, the intermediate limit switches 23 on the adjacent sides of the first furnace body 11 and the adjacent intermediate furnace body 13 are separated from the corresponding intermediate contacts 33, the corresponding intermediate limit switches 23 are closed, and the corresponding intermediate modules 43 are connected. Therefore, the intermediate furnace body 13 adjacent to the first furnace body 11 rises, and so on, the remaining intermediate furnace bodies 13 and the second furnace body 12 rise one by one in sequence; when the first furnace body 11 rises to the top, the first limit switch 21 contacts the first contact 31, so that the first limit switch 21 is disconnected, so that the first module 41 stops working, and the first furnace body 11 stops rising. Then the intermediate limit switches 23 on the adjacent sides of the first furnace body 11 and the adjacent intermediate furnace body 13 are also contacted with the corresponding intermediate contacts 33 and thus disconnected. By analogy, the remaining intermediate furnace bodies 13 and the second furnace bodies 12 rise to the top and stop one by one in sequence. Finally, all the furnace bodies of the furnace body group 1 rise to the top of the furnace body sequential lifting system.

[0075] In the maintenance state, the furnace body group 1 is at the top of the furnace body sequential lifting system, only the second limit switch 22 is separated from the second contact block 32, the second limit switch 22 is in a closed state, and the remaining limit switches of the limit switch group 2 are in contact with the corresponding contacts of the contact block group 3 and are thus in a disconnected state.

[0076] After the maintenance is completed, the second module 42 is connected, and the second furnace body 12 descends. At the same time, the intermediate limit switches 23 on the adjacent sides of the second furnace body 12 and the adjacent intermediate furnace body 13 are separated from the corresponding intermediate contact blocks 33, the corresponding intermediate limit switches 23 are closed, and the corresponding intermediate modules 43 are connected. Therefore, the adjacent intermediate furnace body 13 descends, and so on, the remaining intermediate furnace bodies 13 and the first furnace body 11 descend one by one in sequence; when the second furnace body 12 descends to the bottom, the second limit switch 22 contacts the second contact block 32 and is disconnected, so that the second module 42 stops working, and the second furnace body 12 stops descending, and then the intermediate limit switches 23 on the adjacent sides of the second furnace body 12 and the adjacent intermediate furnace body 13 are also contacted and disconnected with the corresponding intermediate contact blocks 33, and so on, the remaining intermediate furnace bodies 3 and the first furnace body 11 descend to the bottom and stop one by one, and finally all the furnace bodies of the furnace body group 1 descend to the bottom of the furnace body sequential lifting system.

[0077] Preferably, the lifting circuit further comprises a descending relay KA1, an ascending relay KA2, an automatic ascending button SB10 and an automatic descending button SB09, the coil of the descending relay KA1 and the automatic descending button SB09 are connected in series, and the coil of the ascending relay KA2 and the automatic ascending button SB10 are connected in series;

[0078] The descending relay KA1 is provided with a first descending contact KA11 and a plurality of intermediate descending contacts KA12, and the ascending relay KA2 is provided with a first ascending contact KA21 and a plurality of intermediate ascending contacts KA22;

[0079] The first limit switch 21 is connected in series with the first rising contact KA21;

[0080] The second limit switch 22 is connected in series with the first descending contact KA11;

[0081] Each of the intermediate modules 43 is provided with an intermediate rising contact KA22 and an intermediate falling contact KA12 connected in parallel, so that the intermediate module 43 forms an rising circuit 44 and a falling circuit 45, and the intermediate limit switch 23 is connected in series with the intermediate rising contact KA22 and the intermediate falling contact KA12 respectively.

[0082] like Figure 6 and 7 As shown, the rising relay KA2 is controlled by the automatic rising button SB10 to achieve simultaneous switching of the first rising contact KA21 and all the intermediate rising contacts KA22, and the falling relay KA1 is controlled by the automatic falling button SB09 to achieve simultaneous switching of the first falling contact KA11 and all the intermediate falling contacts KA12.

[0083] The first rising contact KA21 controls the on / off of the first module 41, and each of the intermediate rising contacts KA22 controls the on / off of the corresponding rising circuit 44. When maintenance is required, the automatic rising button SB10 is manually closed, and all furnace bodies of the furnace body group 1 located at the bottom of the furnace body sequential lifting system rise in sequence. When the limit switch corresponding to the limit switch group 2 is triggered, the corresponding limit switch is actuated to disconnect the circuit corresponding to the furnace body of the furnace body group 1, and the corresponding furnace body stops rising.

[0084] The first descending contact KA11 controls the on and off of the second module 42, and each of the intermediate descending contacts KA12 respectively controls the on and off of the corresponding descending circuit 45. After maintenance is completed, the automatic descending button SB09 is manually closed, and all the furnace bodies of the furnace body group 1 located at the top of the furnace body sequential lifting system descend in sequence. When the limit switch corresponding to the limit switch group 2 is triggered, the corresponding limit switch is actuated to disconnect the circuit corresponding to the furnace body of the furnace body group 1, and the corresponding furnace body stops descending.

[0085] Preferably, the lifting circuit further includes a plurality of interlocking circuits 46;

[0086] An interlocking circuit 46 is connected in parallel between the first module 41 and the descending circuit 45 of the middle module 43 corresponding to the adjacent middle furnace body 13;

[0087] An interlocking circuit 46 is also connected in parallel between the second module 42 and the rising circuit 44 of the middle module 43 corresponding to the adjacent middle furnace body 13;

[0088] An interlocking circuit 46 is also connected in parallel between the rising circuit 44 and the falling circuit 45 corresponding to the same intermediate furnace body 13 between the two intermediate modules 43 .

[0089] like Figure 6As shown, the intermediate limit switch 23 controls the descent of the intermediate furnace body 3 and the subsequent ascent of the intermediate furnace body 13, and the interlocking circuit 46 includes interlocking relays KM1 and KM2, the coil of the interlocking relay KM1 and the normally closed contact KM21 of the interlocking relay KM2 are connected in series and in parallel with the coil of the interlocking relay KM2, and the normally closed contact KM11 of the interlocking relay KM1 and the coil of the interlocking relay KM2 are connected in series. When the furnace body of the furnace body group 1 rises, the coil of the interlock relay KM1 is connected, the relay normally closed contact KM11 of the interlock relay KM1 located in the corresponding descending circuit 45 is disconnected, and the descending circuit 45 is disconnected; when the furnace body of the furnace body group 1 descends, the coil of the interlock relay KM2 is connected, the relay normally closed contact KM21 of the interlock relay KM2 located in the corresponding ascending circuit 45 is disconnected, and the ascending circuit 44 is disconnected; the interlock circuit 46 ensures that the ascending circuit 44 and the descending circuit 45 of the same furnace body of the furnace body group 1 will not be connected at the same time to cause a short circuit.

[0090] Preferably, the first module 41 is further provided with an independent rising switch SB02 connected in parallel with the first rising contact KA21;

[0091] The rising circuit 44 of the intermediate module 43 is also provided with an independent rising switch SB03 connected in parallel with the intermediate rising contact KA22;

[0092] The second module 42 is also provided with an independent down switch SB01 connected in parallel with the first down contact KA11;

[0093] The descending circuit 45 of the intermediate module 43 is also provided with an independent descending switch SB04 connected in parallel with the intermediate descending contact KA12;

[0094] The independent rising switches SB02 and SB03 are both independently turned on and off, and the independent falling switches SB01 and SB04 are both independently turned on and off.

[0095] When the furnace bodies of the furnace body group 1 do not need to be completely raised or lowered, the independent rising switches SB02 and SB03 and the independent falling switches SB01 and SB04 that are independently turned on and off are used to perform raising and lowering operations on the furnace bodies that need to be raised or lowered.

[0096] Preferably, each of the first module 41, the second module 42 and the middle module 43 is electrically connected to the power supply terminal via a thermal relay FR.

[0097] The main circuit end of each thermal relay FR is electrically connected to the driving mechanism corresponding to the furnace body sequential lifting system. When an accident occurs to the driving mechanism, the control circuit end of the corresponding thermal relay FR is disconnected, causing the corresponding circuit to lose power, thereby stopping the corresponding driving mechanism on the main circuit from operating.

[0098] Preferably, a first mounting column 4 is provided at the head end of the frame, the first limit switch 21 is provided on the first mounting column 4, the first contact block 31 is fixed to the lower end of the outer wall of the first furnace body 11 facing the first mounting column 4 and slides up and down following the first furnace body 11, and the first limit switch 21 is located above the first contact block 31;

[0099] A second mounting column 5 is provided at the end of the frame, the second limit switch 22 is arranged on the second mounting column 5, the second contact block 32 is fixed to the upper end of the outer wall of the second furnace body 12 facing the second mounting column 5 and slides up and down with the second furnace body 12, and the second limit switch 22 is located below the second contact block 32.

[0100] like Figure 8-9 As shown, when rising, the first contact block 31 rises with the first furnace body 11. When the first furnace body 11 rises to the top, the first contact block 31 hits the first limit switch 21 fixed on the first mounting column 4, causing the first limit switch 21 to change from a closed state to an open state, thereby causing the first module 41 to lose power and the first furnace body 11 stops rising; when descending, the second contact block 32 follows the second furnace body 12 to descend. When the second furnace body 12 descends to the bottom, the second contact block 32 hits the second limit switch 22 fixed on the second mounting column 5, causing the second limit switch 22 to change from a closed state to an open state, thereby causing the second module 42 to lose power and the second furnace body 12 stops descending.

[0101] Preferably, a first mounting column 4 is provided at the head end of the frame, the first contact block 31 is provided on the first mounting column 4, the first limit switch 21 is fixed to the lower end of the outer wall of the first furnace body 11 facing the first mounting column 4 and slides up and down following the first furnace body 11, and the first contact block 31 is located above the first limit switch 21;

[0102] A second mounting column 5 is provided at the end of the frame, and the second contact block 32 is arranged on the second mounting column 5. The second limit switch 22 is fixed to the upper end of the outer wall of the second furnace body 12 facing the second mounting column 5 and slides up and down with the second furnace body 12. The second contact block 32 is located below the second limit switch 22.

[0103] like Fig.10As shown, when rising, the first limit switch 21 rises with the first furnace body 11, and when the furnace body 1 rises to the top, the first contact block 31 fixed to the first mounting column 4 hits the first limit switch 21, causing the first limit switch 21 to change from a closed state to an open state, thereby causing the first module 41 to lose power and the first furnace body 11 stops rising; when descending, the second limit switch 22 follows the second furnace body 12 to descend, and when the second furnace body 12 descends to the bottom, the second contact block 32 fixed to the second mounting column 5 hits the second limit switch 22, causing the second limit switch 22 to change from a closed state to an open state, thereby causing the second module 42 to lose power and the second furnace body 12 stops descending.

[0104] Preferably, adjacent side walls of two adjacent furnace bodies of the furnace body group 1 are inclined upward, thereby forming an inclined gap 6 .

[0105] like Figure 2 As shown, the inclined gap 6 can reduce heat loss when the furnace body is heated, thereby improving the heat preservation effect.

[0106] Preferably, the contact block group 3 also includes an adjustment mechanism, and the first contact block 31, the second contact block 32 and the middle contact block 33 are each provided with an adjustment mechanism, and the adjustment mechanism is used to adjust the installation height of the corresponding first contact block 31, the second contact block 32 or the middle contact block 33.

[0107] The first contact block 31, the second contact block 32 and the middle contact block 33 adjust their own installation heights through their own adjustment mechanisms, thereby adjusting their relative positions with the corresponding first limit switch 21, the second limit switch 22 or the middle limit switch 23, and further changing the corresponding lifting heights of the first furnace body 11, the second furnace body 12 or the middle furnace body 13.

[0108] A control method for a furnace sequential lifting system, comprising:

[0109] Ascent process:

[0110] Step A: Press the automatic rising button SB10 to turn on the rising relay KA2, so that the first rising contact KA21 and all the middle rising contacts KA22 are connected;

[0111] Step B: the first module 41 is connected, and the first furnace body 11 starts to rise;

[0112] Step C: the intermediate limit switch 23 of the intermediate furnace body 13 located behind the first furnace body 11 is closed, and the intermediate furnace body 13 starts to rise;

[0113] Step D: The remaining intermediate furnace bodies 13 rise in sequence;

[0114] Step E: After the first furnace body 11 reaches the top, the first limit switch 21 is disconnected, and the first furnace body 11 stops rising;

[0115] Step F: After the remaining intermediate furnace bodies 13 reach the top, the corresponding intermediate limit switches 23 are disconnected in sequence, and the remaining intermediate furnace bodies 13 stop rising in sequence; then, after the second furnace body 12 rises to the top, the second limit switch 22 is disconnected, and the second furnace body 12 stops rising, and the rising of the entire furnace body group 1 is completed;

[0116] Descending process:

[0117] Step G: Press the automatic descending button SB09 to turn on the descending relay KA1, so that the first descending contact KA11 and all the middle descending contacts KA12 are connected;

[0118] Step H: the second module 42 is connected, and the second furnace body 12 begins to descend;

[0119] Step I: the intermediate limit switch 23 of the intermediate furnace body 13 located in front of the second furnace body 12 is closed, and the intermediate furnace body 13 begins to descend;

[0120] Step J: the remaining intermediate furnace bodies 13 are lowered in sequence;

[0121] Step K: After the second furnace body 12 reaches the bottom, the second limit switch 22 is disconnected, and the second furnace body 12 stops descending;

[0122] Step L: After the remaining intermediate furnace bodies 13 reach the bottom, the corresponding intermediate limit switches 23 are disconnected in sequence, and the remaining intermediate furnace bodies 13 stop descending in sequence; then after the first furnace body 11 descends to the bottom, the first limit switch 21 is disconnected, and the first furnace body 11 stops descending, completing the descent of the entire furnace body group 1.

[0123] The rising relay KA2 is controlled by the automatic rising button SB10 so that the first rising contact KA21 and all the middle rising contacts KA22 are turned on and off at the same time, and the falling relay KA1 is controlled by the automatic falling button SB09 so that the first falling contact KA11 and all the middle falling contacts KA12 are turned on and off at the same time. The control method realizes the one-button rising and falling of the furnace group 1 through the automatic rising button SB10 and the automatic falling button SB09, so as to achieve the purpose of automatic lifting of the furnace group 1.

[0124] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0125] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A furnace sequential lifting system, comprising a furnace group, a limit switch group, a contact block group and a lifting circuit; The furnace body group includes a first furnace body, a second furnace body and a plurality of intermediate furnace bodies, wherein the first furnace body is arranged at the head end of the frame, the second furnace body is arranged at the end of the frame, and the plurality of intermediate furnace bodies are arranged in sequence between the first furnace body and the second furnace body in a horizontal direction, and the first furnace body, the second furnace body and the intermediate furnace body all slide up and down independently in a vertical direction; The limit switch group includes a first limit switch, a second limit switch and a plurality of intermediate limit switches, and correspondingly, the contact block group includes a first contact block, a second contact block and a plurality of intermediate contact blocks; Features: A first limit switch and a first contact block are provided between the first furnace body and the frame, the first limit switch or the first contact block slides up and down following the first furnace body, and in a non-maintenance state, the first limit switch and the first contact block are separated and the distance between them is equal to the lifting stroke of the first furnace body; A second limit switch and a second contact block are provided between the second furnace body and the frame, the second limit switch or the second contact block slides up and down following the second furnace body, and in the maintenance state, the second limit switch and the second contact block are separated and the distance between them is equal to the lifting stroke of the second furnace body; A set of intermediate switch groups are fixedly installed between the first furnace body and the adjacent intermediate furnace body, between two adjacent intermediate furnace bodies, and between the second furnace body and the adjacent intermediate furnace body. The intermediate switch group consists of an intermediate limit switch and an intermediate contact block, and all the intermediate limit switches and intermediate contacts are in the same horizontal plane; The lifting circuit includes a first module, a second module and multiple intermediate modules. The first module controls the rise of the first furnace body through a first limit switch, and the second module controls the descent of the second furnace body through a second limit switch. Each intermediate module controls the descent of the first furnace body or the intermediate furnace body installed with the intermediate limit switch and the rise of the subsequent intermediate furnace body or the second furnace body through the corresponding intermediate limit switch.

2. A furnace sequential lifting system according to claim 1, characterized in that: The lifting circuit also includes a descending relay KA1, an ascending relay KA2, an automatic ascending button SB10 and an automatic descending button SB09, the coil of the descending relay KA1 and the automatic descending button SB09 are connected in series, and the coil of the ascending relay KA2 and the automatic ascending button SB10 are connected in series; The descending relay KA1 is provided with a first descending contact KA11 and a plurality of intermediate descending contacts KA12, and the ascending relay KA2 is provided with a first ascending contact KA21 and a plurality of intermediate ascending contacts KA22; The first limit switch is connected in series with the first rising contact KA21; The second limit switch is connected in series with the first descending contact KA11; Each of the intermediate modules is provided with an intermediate rising contact KA22 and an intermediate falling contact KA12 connected in parallel with each other, so that the intermediate module forms an rising circuit and a falling circuit, and the intermediate limit switch is connected in series with the intermediate rising contact KA22 and the intermediate falling contact KA12 respectively.

3. A furnace sequential lifting system according to claim 2, characterized in that: The lifting circuit also includes a plurality of interlocking circuits; An interlocking circuit is connected in parallel between the first module and the descending circuit of the middle module corresponding to the adjacent middle furnace body; An interlocking circuit is also connected in parallel between the second module and the rising circuit of the middle module corresponding to the adjacent middle furnace body; An interlocking circuit is also connected in parallel between the rising circuit and the falling circuit corresponding to the same intermediate furnace body between the two intermediate modules.

4. A furnace sequential lifting system according to claim 3, characterized in that: The first module is also provided with an independent rising switch SB02 connected in parallel with the first rising contact KA21; The rising circuit of the intermediate module is also provided with an independent rising switch SB03 connected in parallel with the intermediate rising contact KA22; The second module is also provided with an independent down switch SB01 connected in parallel with the first down contact KA11; The descending circuit of the intermediate module is also provided with an independent descending switch SB04 connected in parallel with the intermediate descending contact KA12; The independent rising switches SB02 and SB03 are both independently turned on and off, and the independent falling switches SB01 and SB04 are both independently turned on and off.

5. A furnace sequential lifting system according to claim 4, characterized in that: The first module, the second module and the middle module are each electrically connected to the power supply terminal via a thermal relay FR.

6. A furnace sequential lifting system according to claim 1, characterized in that: A first mounting column is provided at the head end of the frame, the first limit switch is provided on the first mounting column, the first contact block is fixed to the lower end of the outer wall of the first furnace body facing the first mounting column and slides up and down with the first furnace body, and the first limit switch is located above the first contact block; A second mounting column is provided at the end of the frame, the second limit switch is arranged on the second mounting column, the second contact block is fixed to the upper end of the outer wall of the second furnace body facing the second mounting column and slides up and down with the second furnace body, and the second limit switch is located below the second contact block.

7. The furnace sequential lifting system according to claim 1, characterized in that: A first mounting column is provided at the head end of the frame, the first contact block is provided on the first mounting column, the first limit switch is fixed to the lower end of the outer wall of the first furnace body facing the first mounting column and slides up and down with the first furnace body, and the first contact block is located above the first limit switch; A second mounting column is provided at the end of the frame, the second contact block is arranged on the second mounting column, the second limit switch is fixed to the upper end of the outer wall of the second furnace body facing the second mounting column and slides up and down with the second furnace body, and the second contact block is located below the second limit switch.

8. The furnace sequential lifting system according to claim 1, characterized in that: Adjacent side walls of two adjacent furnace bodies of the furnace body group are inclined upwards, thereby forming an inclined gap.

9. The furnace sequential lifting system according to claim 1, characterized in that: The contact block group also includes an adjustment mechanism. The first contact block, the second contact block and the middle contact block are each provided with an adjustment mechanism, and the adjustment mechanism is used to adjust the installation height of the corresponding first contact block, the second contact block or the middle contact block.

10. The control method of a furnace sequential lifting system according to claim 5, characterized in that: include: Ascent process: Step A: Press the automatic rising button SB10 to turn on the rising relay KA2, so that the first rising contact KA21 and all the middle rising contacts KA22 are connected; Step B: the first modules are connected, and the first furnace body starts to rise; Step C: the middle limit switch of the middle furnace body located behind the first furnace body is closed, and the middle furnace body starts to rise; Step D: The remaining intermediate furnace bodies rise in sequence; Step E: After the first furnace body reaches the top, the first limit switch is disconnected, and the first furnace body stops rising; Step F: After the remaining intermediate furnace bodies reach the top, the corresponding intermediate limit switches are disconnected in sequence, and the remaining intermediate furnace bodies stop rising in sequence; then, after the second furnace body rises to the top, the second limit switch is disconnected, and the second furnace body stops rising, thus completing the rising of the entire furnace body group; Descending process: Step G: Press the automatic descending button SB09 to turn on the descending relay KA1, so that the first descending contact KA11 and all the middle descending contacts KA12 are connected; Step H: the second module is connected, and the second furnace body begins to descend; Step I: the middle limit switch of the middle furnace body located in front of the second furnace body is closed, and the middle furnace body starts to descend; Step J: the remaining intermediate furnace bodies descend in sequence; Step K: After the second furnace body reaches the bottom, the second limit switch is disconnected, and the second furnace body stops descending; Step L: After the remaining intermediate furnace bodies reach the bottom, the corresponding intermediate limit switches are disconnected in sequence, and the remaining intermediate furnace bodies stop descending in sequence; then after the first furnace body descends to the bottom, the first limit switch is disconnected, and the first furnace body stops descending, completing the descent of the entire furnace body group.

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