Sealing device for inlet end and outlet end of heat treatment furnace

Abstract

The utility model relates to a heat treatment furnace inlet and outlet end sealing device and belongs to the technical field of heat treatment furnaces. Comprising a sleeve, the sleeve penetrates through a furnace top, a suspender penetrates through the sleeve, a nut is screwed on the top of the suspender, the nut abuts against the top end of the sleeve, a suspender suspension clasp is arranged at the bottom of the suspender, a detachable sealing curtain unit is arranged on the suspender suspension clasp, the top of the suspender is covered with a cover cap, and the cover cap is in threaded connection with the top of the sleeve. The upper portion of the sleeve is exposed out of the furnace top, a sleeve external thread section is arranged on the outer surface of the exposed end of the sleeve, and internal threads are arranged on the inner surface of the cover cap. The lower inserting depth of the sleeve is smaller than the thickness of a fiber module of the furnace top. The sealing device does not need to be integrally disassembled, even the furnace top structure does not need to be replaced, only the sealing curtain needs to be replaced, the sealing curtain is convenient and fast to replace, and the cost of spare parts is reduced.

Description

Technical Field

[0001] The utility model relates to a sealing device at the inlet and outlet ends of a heat treatment furnace, belonging to the technical field of heat treatment furnaces. Background Art

[0002] The sealing device at the inlet and outlet ends of a heat treatment furnace is mainly used to prevent a large amount of protective atmosphere nitrogen in the furnace from overflowing and heat from being carried out during the opening and closing process of the furnace door. At the same time, it reduces the entry of outside air into the furnace during the entry and exit of heat treatment products, which may cause oxidation of heat treatment products, nodulation of furnace rolls, and quality problems on the lower surface of heat treatment products.

[0003] The sealing device with a conventional design has the following disadvantages:

[0004] 1) After being used for a certain period, the steel structures at the upper part of the sealing curtain and the steel structure at the top of the furnace are prone to deformation, affecting the overall service life.

[0005] 2) Affected by thermal expansion and contraction, it is very difficult to pull out the steel structure at the upper part of the sealing curtain from the steel structure at the top of the furnace after the curtain of the sealing curtain wears or falls off. Moreover, during the removal process, it is easy to damage the fiber module at the top of the furnace.

[0006] 3) According to the sealing curtain with a conventional design, the heat insulation fiber module at the top of the furnace is incomplete. Once the steel structure at the upper part of the sealing curtain is deformed, the heat insulation performance of the furnace top becomes poor, increasing heat loss, and there is even a risk of burning and redness of the furnace skin steel plate at the top of the furnace. Content of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide a sealing device at the inlet and outlet ends of a heat treatment furnace for the above-mentioned existing technology, which is convenient for replacing the worn sealing curtain, avoids damaging the fiber module, improves the sealing performance, and reduces heat dissipation loss.

[0008] The technical solution adopted by the utility model to solve the above problems is: a sealing device at the inlet and outlet ends of a heat treatment furnace, including a sleeve, the sleeve penetrates through the furnace top, a suspension rod is penetrated in the sleeve, a nut is screwed at the top of the suspension rod so that the nut abuts against the top end of the sleeve, a suspension rod buckle is provided at the bottom of the suspension rod, a detachable sealing curtain unit is arranged on the suspension rod buckle, a cover is provided to cover the top of the suspension rod, and the cover is threadedly connected with the top of the sleeve.

[0009] The detachable sealing curtain unit includes a sealing curtain and a lower annular hanging ring, and the lower annular hanging ring is fixedly connected through a pin shaft after passing through an upper annular hanging ring and the sealing curtain.

[0010] The upper part of the sleeve exposes out of the furnace top, an external thread section of the sleeve is provided on the outer surface of the exposed end of the sleeve, and an internal thread is provided on the inner surface of the cover; the insertion depth of the lower part of the sleeve is less than the thickness of the fiber module at the top of the furnace.

[0011] The nut is a double nut.

[0012] A plurality of sleeves are arranged along the length direction of the furnace top.

[0013] Compared with the prior art, the utility model has the advantages of: a sealing device for the inlet and outlet ends of a heat treatment furnace, which does not require the overall removal of the sealing device, or even the replacement of the furnace top structure, but only requires the replacement of the sealing curtain, and the replacement of the sealing curtain is convenient and easy, reducing the cost of spare parts, avoiding damage to the fiber module, improving the sealing performance, and reducing heat dissipation losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a sealing device for the inlet and outlet ends of a heat treatment furnace according to an embodiment of the utility model;

[0015] In the figure, 1 is a fiber module, 2 is a cover, 3 is a suspension rod, 4 is a double nut, 5 is a sleeve, 6 is a suspension rod buckle, 7 is a lower annular buckle, 8 is a pin shaft, and 9 is a sealing curtain. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, a sealing device for the inlet and outlet ends of a heat treatment furnace in this embodiment includes a hollow sleeve 5, a mounting hole is provided on the furnace top, the mounting hole penetrates the furnace skin and the fiber module 1 on the furnace top, and the outer diameter of the sleeve 5 matches the diameter of the mounting hole. The sleeve 5 is provided with a mounting hole, the lower part of the sleeve 5 is inserted into the furnace top to a depth less than the thickness of the fiber module 1, and the upper part of the sleeve 5 is exposed 20-30mm from the furnace top. A suspension rod 3 made of a solid round rod is provided in the sleeve 5, and a suspension rod external thread section is provided on the outer periphery of the upper part of the suspension rod 3. After the suspension rod 3 moves to the required position along the inner cavity of the sleeve 5, a double nut 4 is screwed on the top of the suspension rod 3, and the double nut 4 is threadedly connected with the external thread section, so that the double nut 4 is against the top of the sleeve 5, so that the suspension rod 3 is fixed in the sleeve 5. A suspension rod buckle 6 is provided at the bottom of the suspension rod 3, and a detachable sealing curtain unit is provided on the suspension rod buckle 6, and the suspension rod buckle 6 is used to hang the sealing curtain unit. An external thread section of the sleeve 5 is provided on the outer periphery of the upper part, a cover 2 is provided on the top of the hanger 3, an internal thread section is provided on the inner surface of the cover 2, and the cover 2 is threadedly connected to the top of the sleeve. On the one hand, the sleeve is fixed, and on the other hand, the sealing of the mounting hole is improved, thereby reducing heat dissipation losses.

[0018] The above-mentioned detachable sealing curtain unit includes a sealing curtain 9 and a lower annular lifting ring 7. The lower annular lifting ring 7 is passed through the lifting rod lifting ring 6 and the sealing curtain 9 and is fixedly connected by a pin shaft 8. The sealing curtain can be removed by taking out the pin shaft 8, and the sealing curtain can be disassembled and assembled conveniently and quickly, so that the worn sealing curtain can be quickly replaced.

[0019] Multiple sleeves are arranged along the length direction of the furnace roof, and the number of the sleeves is set according to the specifications of the sealing curtain. Compensation blanket layers are respectively arranged on the outer surfaces of the sleeves.

[0020] The sealing curtain is made of a stainless steel woven mesh cloth and a heat-insulating fiber layer.

[0021] In this application, there is no need to completely remove the sealing device, or even replace the furnace top structure. Only the sealing curtain needs to be replaced, and the replacement of the sealing curtain is convenient and fast, which reduces the spare part cost, avoids damage to the fiber module, improves the sealing performance, and reduces the heat dissipation loss.

[0022] In addition to the above embodiments, the present utility model also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A sealing device for the inlet and outlet of a heat treatment furnace, characterized in that: It includes a sleeve, which is passed through the furnace top, a hanger is passed through the sleeve, a nut is screwed on the top of the hanger so that the nut rests on the top of the sleeve, a hanger buckle is provided at the bottom of the hanger, a detachable sealing curtain unit is provided on the hanger buckle, a cover is provided on the top of the hanger, and the cover is threadedly connected to the top of the sleeve.

2. A heat treatment furnace inlet and outlet sealing device according to claim 1, characterized in that: The detachable sealing curtain unit comprises a sealing curtain and a lower annular hanging ring, wherein the lower annular hanging ring passes through the upper annular hanging ring and the sealing curtain and is fixedly connected via a pin shaft.

3. The heat treatment furnace inlet and outlet sealing device according to claim 1, characterized in that: The upper part of the sleeve is exposed from the furnace top, the outer surface of the exposed end of the sleeve is provided with an outer thread section, and the inner surface of the cover is provided with an inner thread; the insertion depth of the lower part of the sleeve is less than the thickness of the fiber module of the furnace top.

4. The heat treatment furnace inlet and outlet sealing device according to claim 1, characterized in that: The nut is a double nut.

5. The heat treatment furnace inlet and outlet sealing device according to claim 1, characterized in that: A plurality of sleeves are arranged along the length direction of the furnace top.

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