Furnace door pressing and sealing device for industrial furnace

Abstract

The furnace door pressing and sealing device for the industrial furnace comprises a sealing unit, a water cooling unit, an adjustable sealing structure and a power mechanism, the power mechanism comprises a power unit and a transmission structure, the transmission structure comprises a pulley assembly and a connecting rod transmission assembly, and the pulley assembly comprises a pulley arranged on the upper middle portion of a furnace door; one end of a steel wire rope wound on the winch is connected with the connecting rod transmission assembly through the pulley; the adjustable sealing structure comprises a cam driven by the connecting rod transmission assembly to rotate and an inclined ejector rod, the bottom of the ejector rod is connected with the furnace body through a hinged shaft, a roller matched with the cam is arranged in the middle of the ejector rod, and the top of the ejector rod is connected with an automatic pressure relief piece through a hinged shaft. Pressure relief can be conducted according to the preset pressure, the pressure of the inner cavity of the furnace body is controlled within the safety range, sealing can be conducted again after pressure relief is completed, and then safe production is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of industrial kilns, and in particular to a furnace door compression sealing device for an industrial kiln. Background Art

[0002] Industrial kilns are equipment built with refractory materials for calcining materials or firing products, and are widely used in all walks of life. In high-temperature sintering or heat treatment processes, specific gases are usually introduced for atmosphere protection, which can prevent oxidation, control chemical composition, improve product performance, and thus affect product quality and performance. For industrial kilns, the sealing of the furnace door is an important factor that determines the stability of the atmosphere in the kiln. It is necessary not only to ensure the tightness of the seal so that the atmosphere in the kiln is in a stable state, but also to ensure the safe operation of the kiln. In the event of overpressure, it is necessary to release the pressure in time to prevent safety accidents and protect the safety of personnel and equipment. Therefore, it is very important to design a clamping device that can not only ensure the sealing performance of the kiln but also release the pressure in time. Summary of the invention

[0003] In view of this, the present invention proposes a furnace door compression and sealing device for an industrial kiln, which can achieve flexible adjustment of the sealing degree of the furnace door, and can also achieve re-sealing of the furnace door after adjustment, thereby ensuring that the pressure in the inner cavity of the furnace body is always within a safe range and reducing the probability of safety accidents.

[0004] To achieve the above object, the present invention adopts the following technical solutions: The furnace door compression sealing device for an industrial furnace of the present invention comprises a sealing unit arranged between the furnace door and the furnace body and a water cooling unit for taking away the heat of the furnace door, and also comprises two groups of adjustable sealing structures arranged between the furnace body and the furnace door, and also comprises a power mechanism for driving each group of the adjustable sealing structures, the power mechanism comprises a power unit and a transmission structure for transmitting power to the adjustable sealing structure, the power unit comprises a capstan; the transmission structure comprises a pulley assembly and a connecting rod transmission assembly, the pulley assembly comprises a pulley arranged at the middle and upper part of the furnace door, the pulley is located above the capstan, and one end of a steel wire rope wound around the capstan is connected to the connecting rod transmission assembly via the pulley; The adjustable sealing structure includes a cam driven to rotate by the connecting rod transmission assembly and an inclined push rod, the bottom of the push rod is connected to the furnace body through a hinge shaft, the middle of the push rod is provided with a roller that cooperates with the cam, and the top of the push rod is connected to an automatic pressure relief part through a hinge shaft.

[0005] The beneficial effect is that the present invention can release pressure according to a preset pressure, so that the pressure in the inner cavity of the furnace body can be controlled within a safe range, and it can be sealed again after the pressure relief is completed, thereby ensuring safe production. Specifically: the automatic pressure relief part (such as a nitrogen spring) has a preset pressure, and the top of the push rod acts on the automatic pressure relief part. When the internal pressure of the furnace body exceeds a certain value, the internal pressure of the furnace body is applied to the push rod through the cam, and the push rod is subjected to force and acts on the automatic pressure relief part. When the preset pressure of the automatic pressure relief part is exceeded, the upper part of the push rod rotates relative to the outside of the furnace body, thereby reducing the interaction force between the cam and the push rod, so that the cam moves with the furnace door toward the outside of the furnace body, releasing pressure and ensuring safe production. After the pressure relief is completed, the automatic pressure relief part is reset, and the push rod is squeezed by the reset of the automatic pressure relief part, thereby increasing the interaction force between the cam and the push rod, so that the cam moves with the door body toward the inside of the furnace body, thereby achieving the sealing of the furnace door.

[0006] Preferably, an upper transmission shaft and a lower transmission shaft are arranged at intervals on the furnace door, and the upper transmission shaft and the lower transmission shaft are rotatably arranged on the steel structure frame of the furnace door through a bearing seat; the connecting rod transmission assembly comprises a lower connecting rod, a transmission connecting rod, a connecting rod and an upper connecting rod, the lower connecting rod is arranged obliquely downward from the lower transmission shaft, the bottom of the lower connecting rod and the bottom of the transmission connecting rod are hinged together, the transmission connecting rod is located below the pulley, one end of the steel wire rope is connected to the upper part of the transmission connecting rod after passing through the pulley, and the other end of the steel wire rope is connected to the lower part of the transmission connecting rod; the upper connecting rod is fixed on the upper transmission shaft, the upper part of the connecting connecting rod is hinged at the free end of the upper connecting rod, and the lower part of the connecting connecting rod is hinged at the middle part of the lower connecting rod; one cam of each group of adjustable sealing structures is installed on the upper transmission shaft, and the other cam is installed on the lower transmission shaft. The beneficial effect is that the present invention can adjust the rotation direction of the cam through the wire rope. When the capstan rotates clockwise, one end of the wire rope pulls the bottom of the transmission connecting rod downward, causing the upper connecting rod and the lower connecting rod to rotate downward, so that the protruding part of the cam rotates downward clockwise to achieve pressure relief; when the capstan rotates counterclockwise, the wire rope transmits force to the upper part of the transmission connecting rod, causing the transmission connecting rod to rise, and the transmission connecting rod pulls the upper connecting rod to rotate upward with the lower transmission shaft as the center, thereby causing the protruding part of the cam to rotate upward counterclockwise, and the reaction force of the cam on the top rod causes it to move toward the inside of the furnace body, thereby achieving the sealing of the furnace door.

[0007] Preferably, the edges of the inner side surface of the door body of the furnace door are provided with mounting grooves opened along the circumference thereof, and the sealing unit comprises a flexible high temperature resistant sealing strip arranged in the mounting groove to ensure the sealing performance.

[0008] Preferably, the water cooling unit includes a water cooling pipe arranged circumferentially around the door body. During actual installation, the water inlet of the water cooling pipe can be directly connected to tap water and the cold water outlet can be connected to a designated recovery container, so that the high-temperature furnace door can be cooled by tap water; of course, the water cooling pipe can also be connected to a circulating cooling water system.

[0009] More preferably, the water cooling pipe is located outside the flexible high temperature resistant sealing strip, and the heat on the furnace door is taken away by low temperature water flowing through the water cooling pipe, while cooling the sealing strip and the furnace door, thereby increasing the service life of the furnace door.

[0010] In one embodiment of the present invention, the power mechanism is a manual winch to achieve manual sealing.

[0011] In another embodiment of the present invention, the power mechanism further includes a motor and a reducer, and the reducer is connected to the shaft of the capstan in a transmission manner, thereby achieving automatic sealing.

[0012] Compared with the prior art, the present invention can achieve pressure relief and re-sealing after pressure relief, thereby controlling the pressure of the furnace cavity within a safe range to ensure safe production. Specifically: the automatic pressure relief part of the present invention has a preset pressure, and the top of the push rod acts on the automatic pressure relief part. When the pressure inside the furnace body exceeds a certain value, the capstan is rotated to ensure that the cam can rotate relatively. The high pressure inside the furnace body is applied to the push rod through the cam. The push rod is subjected to force and acts on the automatic pressure relief part. When the preset pressure of the automatic pressure relief part is exceeded, the upper part of the push rod rotates relatively toward the outside of the furnace body, thereby reducing the interaction force between the cam and the push rod, so that the cam moves with the furnace door toward the outside of the furnace body, releasing pressure and ensuring safe production; after the pressure relief is completed, the automatic pressure relief part is reset, and the push rod is squeezed by the reset of the automatic pressure relief part, thereby increasing the interaction force between the cam and the push rod, so that the cam moves with the door toward the inside of the furnace body to achieve sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 yes Figure 1 BB direction schematic diagram.

[0015] Figure 3 yes Figure 2 An enlarged schematic diagram of the medium adjustable sealing structure. DETAILED DESCRIPTION

[0017] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0018] It should be noted that, in the description of the present invention, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0019] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear 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 mechanical connection or an electrical 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1-3 As shown, the furnace door pressing and sealing device for an industrial furnace of the present invention comprises a sealing unit arranged between a furnace door 1 (the furnace door 1 is a lifting door) and a furnace body 2, a water cooling unit for taking away the heat of the furnace door 1, two groups of adjustable sealing structures A arranged between the furnace body 2 and the furnace door 1, and a power mechanism for driving each group of adjustable sealing structures A, the adjustable sealing structures are arranged in groups of two, each group of adjustable sealing structures is arranged with an interval up and down, the adjustable sealing structures A are arranged between the furnace door 1 and the furnace body 2, and the left side and the right side of the furnace door 1 are connected to the furnace body 2 through two adjustable sealing structures A respectively; The furnace door 1 has installation grooves opened along the circumference at the edges of the inner side of the door body. The sealing unit includes a flexible high-temperature resistant sealing strip 3 arranged in the installation groove to ensure the sealing performance; the water cooling unit includes a water cooling pipe 4 arranged circumferentially along the four sides of the door body. The cooling pipe is located on the outside of the flexible high-temperature resistant sealing strip 3. The water cooling pipe 4 is a rectangular pipe. Since the working temperature inside the furnace body 2 is often relatively high, the temperature of the furnace door 1 is also relatively high. Therefore, in actual operation, circulating water can be introduced into the water cooling pipe 4 for cooling. The heat of the furnace door 1 is taken away by the circulating water with a relatively low temperature, thereby protecting the furnace door 1 and increasing the service life of the furnace door 1. The power mechanism includes a power unit and a transmission structure for transmitting power to the adjustable sealing structure A. The power unit includes a capstan 5 (wound with a steel wire rope 6) with a self-locking function. After the seal is in place, the capstan 5 is fixed to ensure the sealing effect of the furnace door 1. The transmission structure includes a pulley assembly and a connecting rod transmission assembly. The pulley assembly includes a pulley 7 arranged in the upper middle part of the furnace door 1 and located above the capstan 5. One end of the steel wire rope 6 is connected to the connecting rod transmission assembly through the pulley 7. The adjustable sealing structure A includes a cam 8 driven to rotate by a connecting rod transmission assembly and an inclined push rod 9. The bottom of the push rod 9 is connected to the furnace body 2 through a hinge shaft. A roller 10 cooperating with the cam 8 is arranged in the middle of the push rod 9. The top of the push rod 9 is connected to an automatic pressure relief part (a nitrogen spring 11 with a certain preset pressure is preferably used in the present invention) through a hinge shaft. The push rod 9 acts on the nitrogen spring 11 and can transfer the force received to the nitrogen spring 11. When the acting force is less than the preset pressure of the nitrogen spring 11, the push rod 9 remains stationary; when the acting force is greater than the preset pressure of the nitrogen spring 11, the push rod can be pushed open by the cam under the action of the high pressure in the furnace, thereby achieving pressure relief.

[0021] The present invention can not only realize the sealing between the furnace door 1 and the furnace body 2, but also open the furnace door 1 to a certain gap to realize pressure relief when the internal pressure of the furnace body 2 exceeds the safe pressure range, and can be sealed again after the pressure relief is completed. The specific process is: during production, the capstan 5 is rotated, and the cam 8 is driven to rotate by the wire rope 6 and the connecting rod transmission assembly, so that the protruding part of the cam 8 rotates and acts on the roller 10 on the push rod 9, and the push rod 9 is subjected to force and acts on the nitrogen spring 11. Since the internal pressure of the furnace body 2 is relatively low, the force applied by the push rod 9 to the nitrogen spring 11 is less than its preset pressure, so that the push rod 9 remains motionless, so that the furnace door 1 has to move in the sealing and pressing direction of the furnace door 1, thereby realizing the sealed connection between the furnace door 1 and the furnace body 2; after the furnace door 1 is in place, the capstan 5 is locked, thereby realizing the locking of the furnace door 1, and ensuring the stability of the sealing between the furnace body 2 and the furnace door 1; When the internal pressure of the furnace body 2 exceeds a certain value and triggers automatic pressure relief, the internal pressure of the furnace body 2 is transmitted to the push rod 9 through the cam 8, and then applied to the nitrogen spring 11. When the pressure borne by the nitrogen spring 11 exceeds the preset pressure, the nitrogen spring 11 automatically acts to provide a certain rotation stroke for the push rod 9. The push rod 9 is pushed open under the action of the high pressure of the furnace body 2, and the cam 8 moves with the furnace door 1 to the outside of the furnace body 2 to release the pressure; After the pressure relief is completed, the nitrogen spring 11 is reset, and the push rod 9 is squeezed by the nitrogen spring 11. The roller 10 on the push rod 9 transmits the force to the cam 8. Since the internal pressure of the furnace body 2 is relatively low after the pressure relief, the furnace door 1 moves in the compression direction of the furnace door 1 under the action of the extrusion thrust, thereby realizing the automatic re-sealing connection between the furnace door 1 and the furnace body 2.

[0022] Combination Figure 1-3 It can be seen that the furnace door 1 includes a door body 1a and a steel structure frame 1b, an upper transmission shaft 12 and a lower transmission shaft 13 are arranged on the steel structure frame 1b at intervals, and the upper transmission shaft 12 and the lower transmission shaft 13 are rotatably arranged on the steel structure frame 1b of the furnace door 1 through a bearing seat, and one cam 8 of each group of adjustable sealing structures A is key-connected to the upper transmission shaft 12, and the other cam 8 is key-connected to the lower transmission shaft 13; The connecting rod transmission assembly includes a lower connecting rod 14, a transmission connecting rod 15, a connecting connecting rod 16 and an upper connecting rod 17. The lower connecting rod 14 is key-connected with the lower transmission shaft 13 and is arranged obliquely downward from the lower transmission shaft 13. The bottom of the lower connecting rod 14 and the bottom of the transmission connecting rod 15 are hinged together. A rope groove is sleeved on the hinge shaft at the bottom of the transmission connecting rod 15. The transmission connecting rod 15 is located below the pulley 7. The steel wire rope 6 wound on the capstan 5 has two free ends, one of which is connected to the upper part of the transmission connecting rod 15 after passing through the pulley 7, and the other free end of the steel wire rope 6 is fixed to the rope groove at the bottom of the transmission connecting rod 15. The upper connecting rod 17 is fixed on the upper transmission shaft 12 and is arranged obliquely downward from the upper transmission shaft 12. The upper part of the connecting rod 16 is hinged at the free end of the upper connecting rod 17, and the lower part of the connecting rod 16 is hinged at the middle part of the lower connecting rod 14. The external force applied by the wire rope 6 can be transmitted to the upper connecting rod 17 through the transmission connecting rod 15, the lower connecting rod 14 and the connecting rod 16. The upper connecting rod 17 is forced to drive the upper transmission shaft 12 to rotate synchronously, and the lower connecting rod 14 is forced to drive the lower transmission shaft 13 to rotate, thereby realizing the synchronous rotation of the two cams 8.

[0023] The present invention can adjust the rotation direction of the cam 8 by pulling the wire rope 6. When the capstan 5 rotates clockwise, the wire rope 6 pulls the bottom of the transmission connecting rod 15 downward, and the lower connecting rod 14 is forced to rotate downward. The connecting rod 16 simultaneously transmits the power to the upper connecting rod 17, so that the upper transmission shaft 12 and the lower transmission shaft 13 rotate synchronously clockwise, and the cam 8 rotates clockwise downward. When the maximum protrusion of the protrusion rotates to the bottom of the roller 10, pressure relief is achieved; when the capstan 5 rotates counterclockwise, the wire rope 6 transmits the force to the upper part of the transmission connecting rod 15, so that the transmission connecting rod 15 rises, and the transmission connecting rod 15 pulls the lower connecting rod 14, and the lower connecting rod 14 transmits the force to the upper connecting rod 17 synchronously, thereby making the upper transmission shaft 12 and the lower transmission shaft 13 rotate synchronously counterclockwise, and the cam 8 rotates counterclockwise upward, and the sealing of the furnace door 1 is achieved by the extrusion force of the protrusion of the cam 8 and the roller 10.

[0024] During actual installation, the winch 5 of the present invention can be driven manually or electrically, such as using a motor and a reducer to drive the winch 5 with a self-locking function to rotate clockwise or counterclockwise to achieve electric adjustment.

[0025] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A furnace door compression sealing device for an industrial furnace, comprising a sealing unit arranged between the furnace door and the furnace body and a water cooling unit for removing heat from the furnace door, characterized in that: It also includes two groups of adjustable sealing structures arranged between the furnace body and the furnace door, and a power mechanism that drives each group of the adjustable sealing structures, the power mechanism includes a power unit and a transmission structure that transmits power to the adjustable sealing structure, the power unit includes a capstan; the transmission structure includes a pulley assembly and a connecting rod transmission assembly, the pulley assembly includes a pulley arranged at the upper middle part of the furnace door, the pulley is located above the capstan, and one end of the steel wire rope wound around the capstan is connected to the connecting rod transmission assembly via the pulley; The adjustable sealing structure includes a cam driven to rotate by the connecting rod transmission assembly and an inclined push rod, the bottom of the push rod is connected to the furnace body through a hinge shaft, the middle of the push rod is provided with a roller that cooperates with the cam, and the top of the push rod is connected to an automatic pressure relief part through a hinge shaft.

2. The furnace door compression sealing device for an industrial furnace according to claim 1, characterized in that: An upper transmission shaft and a lower transmission shaft are arranged at intervals on the furnace door, and the upper transmission shaft and the lower transmission shaft are rotatably arranged on the steel structure frame of the furnace door through a bearing seat; the connecting rod transmission assembly comprises a lower connecting rod, a transmission connecting rod, a connecting rod and an upper connecting rod, the lower connecting rod is arranged obliquely downward from the lower transmission shaft, the bottom of the lower connecting rod and the bottom of the transmission connecting rod are hinged together, the transmission connecting rod is located below the pulley, one end of the steel wire rope is connected to the upper part of the transmission connecting rod after passing through the pulley, and the other end of the steel wire rope is connected to the lower part of the transmission connecting rod; the upper connecting rod is fixed on the upper transmission shaft, the upper part of the connecting connecting rod is hinged at the free end of the upper connecting rod, and the lower part of the connecting connecting rod is hinged at the middle part of the lower connecting rod; one cam of each group of adjustable sealing structures is installed on the upper transmission shaft, and the other cam is installed on the lower transmission shaft.

3. The furnace door compression sealing device for an industrial furnace according to claim 1, characterized in that: The edges of the inner side of the door body of the furnace door are provided with mounting grooves opened along the circumference thereof, and the sealing unit comprises a flexible high temperature resistant sealing strip arranged in the mounting groove.

4. The furnace door compression sealing device for an industrial furnace according to claim 3 is characterized in that: The water cooling unit comprises a water cooling pipe circumferentially arranged around the door body.

5. The furnace door compression sealing device for an industrial furnace according to claim 4, characterized in that: The water cooling pipe is located on the outside of the flexible high temperature resistant sealing strip.

6. The furnace door compression sealing device for an industrial furnace according to claim 1, characterized in that: The power mechanism is a manual winch.

7. The furnace door compression sealing device for an industrial furnace according to claim 1 is characterized in that: The power mechanism also includes a motor and a reducer, and the reducer is drivingly connected to the shaft of the winch.

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