Pit furnace

Abstract

A pit furnace belongs to the technical field of pit furnaces and comprises a pit furnace main body, a well lid is mounted at a well mouth of the pit furnace main body, a locking device is arranged between the well lid and the pit furnace main body, a plurality of hooks A are fixedly mounted on the lower surface of the well lid, and a plurality of detachable material baskets are hung on the well lid through the hooks A; the multiple material baskets are cooperatively hoisted together in sequence from top to bottom, each material basket comprises an I-shaped frame, the bottom and the outer surface of each I-shaped frame are both in a hollowed-out state, a plurality of hanging rods are fixedly installed on the upper surface of each I-shaped frame, limiting holes are formed in the tops of the hanging rods in a penetrating mode, hooks A are inserted into the corresponding limiting holes to hoist the I-shaped frames, and hooks B are fixedly installed on the upper surface of each I-shaped frame. A plurality of check blocks are fixedly installed on the outer surface of the I-shaped frame, a movable ring is rotatably installed between the check blocks and the I-shaped frame, a plurality of hooks B are fixedly installed on the lower surface of the movable ring at equal intervals, and a through opening is formed in the lower surface of the I-shaped frame in a penetrating mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of pit furnaces, and in particular relates to a pit furnace. Background Art

[0002] Pit furnace is an important heat treatment equipment and is widely used in the field of tool steel manufacturing.

[0003] After searching, the Chinese authorized patent in the relevant field, the patent publication number is: CN211425032U, the patent name is: a simple pit type furnace, the top of the furnace barrel is the furnace edge, the diameter of the furnace edge is larger than the diameter of the furnace barrel, the inner side of the furnace edge is provided with a clamping edge, the upper part of the clamping edge is covered with a furnace cover, the top of the furnace cover is provided with a hanging ring, an air filling pipe is installed on the left side of the furnace edge, two air valves are installed on the left side of the furnace edge and in front of the air filling pipe, a protective cover is welded above the air filling pipe, an exhaust pipe is installed on the right side of the furnace edge, the inner side of the furnace barrel is an inner barrel, the inner side of the inner barrel is a heat treatment chamber, a number of heating pipes are installed on the inner wall of the inner barrel, the height of the heating pipe is lower than the height of the air filling pipe and the exhaust pipe, the exhaust pipe and the air filling pipe are located in the same horizontal direction, the heating pipe is located in the heat treatment chamber, with a spacing, and there are three rows from top to bottom.

[0004] With regard to the simple pit-type furnace in the above-mentioned prior art, it lacks a material lifting structure, which makes it difficult to take out the materials in the furnace after heat treatment, and is quite inconvenient to use. Therefore, another pit-type furnace is provided to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the fact that the simple pit-type furnace in the prior art lacks a material lifting structure, and it is inconvenient to take out the materials after the heat treatment of the materials in the furnace is completed, the utility model provides a pit-type furnace, by setting a plurality of material baskets that can be hoisted together, and setting a hook A on the lower surface of the pit cover, in actual application, the plurality of material baskets can be first vertically hoisted together, and then the top material basket can be hoisted at the hook A for use. In this way, when the pit-type furnace is opened, the pit cover can be lifted out together with the material basket by an external hoist, so as to facilitate the removal of the heat-treated materials from the pit-type furnace, which effectively solves the problem of the inconvenience of taking out the materials after the heat treatment of the materials in the simple pit-type furnace in the prior art. The specific technical scheme is as follows:

[0006] A pit-type furnace comprises a pit-type furnace body, a pit cover is installed at the pit mouth of the pit-type furnace body, a locking device is arranged between the pit cover and the pit-type furnace body, and a plurality of hooks A are fixedly installed on the lower surface of the pit cover, a plurality of detachable material baskets are hoisted on the pit cover through the hooks A, and the plurality of material baskets are cooperatively hoisted together in sequence from top to bottom, and the material basket comprises an "I"-shaped frame, the bottom and outer surface of the "I"-shaped frame are both hollowed out, and a plurality of suspension rods are fixedly installed on the upper surface of the "I"-shaped frame, and the tops of the suspension rods are penetrated with limiting holes, the hooks A are inserted into the corresponding limiting holes to suspend the "I"-shaped frame, a plurality of blocks are fixedly installed on the outer surface of the "I"-shaped frame, and a movable ring is rotatably installed between the block and the "I"-shaped frame, a plurality of hooks B are equidistantly fixedly installed on the lower surface of the movable ring, and a through opening is penetrated on the lower surface of the "I"-shaped frame.

[0007] In the above technical solution, a plurality of toggle blocks are fixedly installed at equal intervals on the outer surface of the movable ring;

[0008] In the above technical scheme, six positioning holes are equidistantly opened on the outer surface of the manhole cover, and the locking device includes six connecting pipes, and the six connecting pipes are equidistantly fixedly installed on the outer surface of the pit-type furnace body, and telescopic air bags are installed in the connecting pipes, and the outer ends of the telescopic air bags are fixedly connected to the connecting pipes, and the inner ends of the telescopic air bags are fixedly installed with positioning rods, and the positioning rods penetrate the pit-type furnace body and are plugged and installed in the corresponding positioning holes, and a ventilation ring pipe is fixedly installed between the outer ends of the six connecting pipes, and an air supply pipe is connected and installed between the connecting pipe and the ventilation ring pipe, and a connecting pipe is fixedly installed on the air inlet end of the ventilation ring pipe, and an air injection cylinder is fixedly installed on the outer surface of the pit-type furnace body, and a hydraulic telescopic rod is fixedly installed on the lower end of the air injection cylinder, and a fixing plate is fixedly installed on the top of the hydraulic telescopic rod, and a rubber sealing plug is fixedly installed on the upper surface of the fixing plate, and the rubber sealing plug and the fixing plate are both slidably installed in the air injection cylinder;

[0009] In the above technical solution, a sealing ring is fixedly installed on the lower surface of the manhole cover, and the lower surface of the sealing ring is in contact with the side wall of the top inner cavity of the pit furnace body;

[0010] In the above technical solution, a lifting ring is fixedly installed at the center of the upper surface of the manhole cover.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model configures a plurality of material baskets that can be hoisted collaboratively, and a hook A is arranged on the lower surface of the well cover. During the actual operation process, first, the plurality of material baskets are hoisted vertically in collaboration, and then the uppermost material basket is hoisted to the position of the hook A. Thus, when opening the pit furnace, the well cover and the material baskets can be lifted together by an external lifting tool, which is convenient for taking out the heat-treated materials from the pit furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view structural schematic diagram of the utility model.

[0014] Figure 2 is the sectional structural schematic diagram of the utility model.

[0015] Figure 3 is the bottom view structural schematic diagram of the well cover of the utility model.

[0016] Figure 4 is the structural schematic diagram of the "I"-shaped frame of the utility model.

[0017] Figure 5 is the structural schematic diagram of the material basket of the utility model.

[0018] Figure 6 is Figure 2 the partial structural schematic diagram at position a in

[0019] Figure 1-6 In DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figure 1-Figure 6 , the present utility model provides a technical solution:

[0022] A pit furnace comprises a pit furnace body 1, a pit cover 2 is installed at the pit mouth of the pit furnace body 1, a locking device 3 is arranged between the pit cover 2 and the pit furnace body 1, and a plurality of hooks A22 are fixedly installed on the lower surface of the pit cover 2, a plurality of detachable material baskets are hoisted on the pit cover 2 through the hooks A22, and the plurality of material baskets are hoisted together in sequence from top to bottom, and the material basket comprises an "I"-shaped frame 4, the bottom and outer surface of the "I"-shaped frame 4 are both in a hollow state, and the "I"-shaped frame 4 A plurality of suspension rods 41 are fixedly installed on the upper surface, and a limited hole 411 is provided on the top of each suspension rod 41, and a hook A22 is inserted into the corresponding limited hole 411 to suspend the "I"-shaped frame 4, and a plurality of stoppers 42 are fixedly installed on the outer surface of the "I"-shaped frame 4, and a movable ring 43 is rotatably installed between the stopper 42 and the "I"-shaped frame 4, and a plurality of hooks B431 are fixedly installed on the lower surface of the movable ring 43 at equal intervals, and a through hole 44 is provided on the lower surface of the "I"-shaped frame 4;

[0023] When in use, first use the external lifting device to lift the manhole cover 2 to a certain height, and then lift multiple material baskets together. Figure 5 As shown, the suspension rod 41 on the lower "I"-shaped frame 4 is passed through the opening 44 of the upper "I"-shaped frame 4, and then the movable circle 43 is rotated to insert the hook B431 into the limiting hole 411 corresponding to the suspension rod 41. Under the gravity of the lower "I"-shaped frame 4 itself, the suspension rod 41 exerts a downward force on the upper hook B431, thereby completing the lifting. The lower "I"-shaped frame 4 can be lifted in the above-mentioned manner in sequence. After lifting, the uppermost suspension rod 41 is lifted to the hook A22 of the manhole cover 2, and the suspension rod 41 is hung on the hook A22 using the limiting hole 411. After installation, the workpiece to be heat treated is placed in the material basket, and then the material basket is lifted into the pit furnace body 1 with the help of an external lifting device, and the manhole cover 2 is covered at the wellhead of the pit furnace body 1 and fixed with the locking device 3. After the heat treatment of the workpiece is completed, the locking device 3 is unlocked, and the manhole cover 2 and the material basket are lifted out of the pit furnace together with the external lifting device.

[0024] When the material baskets are hoisted together, the movable ring 43 is rotated to facilitate operation. Figure 5 As shown, a plurality of toggle blocks 432 are fixedly installed at equal intervals on the outer surface of the movable ring 43. The movable ring 43 can be driven to rotate by the toggle blocks 432, so that the operation can be more convenient and labor-saving.

[0025] It should be noted that, combined with Figure 6As shown, the outer surface of the manhole cover 2 is equidistantly provided with six positioning holes 21, and the locking device 3 includes six connecting pipes 31, which are equidistantly fixedly installed on the outer surface of the pit-type furnace body 1, and a telescopic airbag 311 is installed in each connecting pipe 31. The outer end of the telescopic airbag 311 is fixedly connected to the connecting pipe 31, and a positioning rod 312 is fixedly installed on the inner end of the telescopic airbag 311. The positioning rod 312 penetrates the pit-type furnace body 1 and is plugged into the corresponding positioning holes 21. A ventilation ring pipe 32 is fixedly installed between the outer ends of the six connecting pipes 31, and the connecting pipe 31 is fixedly provided with a positioning rod 312. An air supply pipe 313 is connected and installed between the connecting pipe 31 and the ventilation ring pipe 32, a connecting pipe 33 is fixedly installed on the air inlet end of the ventilation ring pipe 32, an air injection cylinder 34 is fixedly installed on the air inlet end of the connecting pipe 33, the air injection cylinder 34 is fixedly installed on the outer surface of the pit-type furnace body 1, and a hydraulic telescopic rod 35 is fixedly installed on the lower end of the air injection cylinder 34, a fixing plate 351 is fixedly installed on the top of the hydraulic telescopic rod 35, a rubber sealing plug 352 is fixedly installed on the upper surface of the fixing plate 351, and the rubber sealing plug 352 and the fixing plate 351 are both slidably installed in the air injection cylinder 34;

[0026] When the hydraulic telescopic rod 35 is extended, it can drive the fixed plate 351 and the rubber sealing plug 352 to move upward, and the gas in the gas injection cylinder 34 is passed into each telescopic airbag 311 through the connecting pipe 33, the ventilation ring pipe 32 and the air supply pipe 313, and the telescopic airbag 311 is extended, thereby driving the positioning rod 312 to move to the positioning hole 21 of the manhole cover 2 to limit and fix the manhole cover 2. Conversely, when the hydraulic telescopic rod 35 is contracted, it can drive the fixed plate 351 and the rubber sealing plug 352 to move downward, and the gas injection cylinder 34 can extract the gas of each telescopic airbag 311 through the connecting pipe 33, the ventilation ring pipe 32 and the air supply pipe 313 to cause it to contract, thereby driving the corresponding positioning rod 312 to be withdrawn from the positioning hole 21 of the manhole cover 2 to release the fixation of the manhole cover 2.

[0027] To ensure the sealing effect of the pit furnace body 1 and prevent heat from dissipating, Figure 6 As shown, a sealing ring is fixedly installed on the lower surface of the manhole cover 2, and the lower surface of the sealing ring is in contact with the side wall of the top inner cavity of the pit-type furnace body 1. The sealing ring can be used to strengthen the sealing between the manhole cover 2 and the pit-type furnace body 1.

[0028] Finally, in order to facilitate the manhole cover 2 to be lifted by the external lifting device, as shown in FIG. Figure 2 As shown, a lifting ring 23 is fixedly installed at the center of the upper surface of the manhole cover 2, and the hook of the external lifting device can be hung on the lifting ring 23 to lift the manhole cover 2.

Claims

1. A pit furnace, comprising a pit furnace body (1), a pit cover (2) being installed at the pit mouth of the pit furnace body (1), characterized in that: A locking device (3) is provided between the manhole cover (2) and the pit furnace body (1), and a plurality of hooks A (22) are fixedly mounted on the lower surface of the manhole cover (2), and a plurality of detachable material baskets are hoisted on the manhole cover (2) via the hooks A (22), and the plurality of material baskets are hoisted together in sequence from top to bottom; The material basket comprises an "I"-shaped frame (4), the bottom and outer surface of the "I"-shaped frame (4) are both in a hollow state, and a plurality of suspension rods (41) are fixedly installed on the upper surface of the "I"-shaped frame (4), and the tops of the suspension rods (41) are penetrated with limit holes (411), and the hooks A (22) are inserted into the corresponding limit holes (411) to suspend the "I"-shaped frame (4), and a plurality of stoppers (42) are fixedly installed on the outer surface of the "I"-shaped frame (4), and a movable ring (43) is rotatably installed between the stoppers (42) and the "I"-shaped frame (4), and a plurality of hooks B (431) are fixedly installed at equal intervals on the lower surface of the movable ring (43), and a through opening (44) is penetrated through the lower surface of the "I"-shaped frame (4).

2. A pit furnace according to claim 1, characterized in that: A plurality of toggle blocks (432) are fixedly mounted at equal intervals on the outer surface of the movable ring (43).

3. A pit furnace according to claim 1, characterized in that: The outer surface of the manhole cover (2) is provided with six positioning holes (21) at equal intervals; The locking device (3) comprises six connecting pipes (31), the six connecting pipes (31) being fixedly installed at equal distances on the outer surface of the pit-type furnace body (1), the connecting pipes (31) being each installed with a telescopic airbag (311), the outer end of the telescopic airbag (311) being fixedly connected to the connecting pipe (31), the inner end of the telescopic airbag (311) being fixedly installed with a positioning rod (312), the positioning rod (312) passing through the pit-type furnace body (1) and being plugged into a corresponding positioning hole (21), a ventilation ring pipe (32) being fixedly installed between the outer ends of the six connecting pipes (31), the connecting pipe (31) and the ventilation ring pipe (312) being fixedly installed with the ventilation ring pipe (312). 2) are connected and installed with an air supply pipe (313), the air inlet end of the ventilation ring pipe (32) is fixedly installed with a connecting pipe (33), the air inlet end of the connecting pipe (33) is fixedly installed with an air injection cylinder (34), the air injection cylinder (34) is fixedly installed on the outer surface of the shaft furnace body (1), and the lower end of the air injection cylinder (34) is fixedly installed with a hydraulic telescopic rod (35), the top end of the hydraulic telescopic rod (35) is fixedly installed with a fixing plate (351), the upper surface of the fixing plate (351) is fixedly installed with a rubber sealing plug (352), and the rubber sealing plug (352) and the fixing plate (351) are both slidably installed in the air injection cylinder (34).

4. A pit furnace according to claim 3, characterized in that: A sealing ring is fixedly mounted on the lower surface of the well cover (2), and the lower surface of the sealing ring is in contact with the side wall of the top inner cavity of the well furnace body (1).

5. A pit furnace according to claim 3, characterized in that: A lifting ring (23) is fixedly mounted at the center of the upper surface of the manhole cover (2).

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