A new type of copper smelting industry flue pipe manhole door device

Abstract

The utility model discloses a novel copper smelting industry flue gas pipeline manhole door device, including manhole door cover and manhole, the inside of manhole door cover upper welding has a circle flat iron, and one layer KPI internal anticorrosive layer is laid in the flat iron, and at least one circle high temperature resistant puffed fluorine band is formed to form soft seal in the setting of manhole outer edge between manhole door cover and manhole, and manhole door cover is pressed in the manhole and forms seal. The utility model increases the KPI internal anticorrosive layer formed by KPI internal anticorrosive daub, and the service life of manhole door is greatly prolonged. The high temperature resistant puffed fluorine band soft seal is used between manhole door cover and manhole, and the environmental protection problem caused by flue gas leakage and the influence on the working environment are avoided. The inclined pin U-shaped frame is used to form the inclined locking mechanism for connecting manhole door cover and manhole, and the bolt corrosion causes the dismounting difficult condition to be avoided. The center swing lever structure is used between manhole door cover and manhole, and the safety hidden danger caused by carrying manhole door cover can be avoided when opening manhole.

Description

Technical Field

[0001] This utility model relates to the field of heavy non-ferrous metal smelting technology, and in particular to a novel manhole door device for flue gas pipelines in the copper smelting industry. Background Technology

[0002] In the pyrometallurgical copper production process, the flue gas generated by the smelting furnace contains a high concentration of sulfur-containing substances. Upon encountering air and water-cooled substances, these substances condense into acid that corrodes manhole doors. The proper functioning of the flue gas duct manhole doors directly affects the production operation of the smelting system. Therefore, selecting reliable manhole door devices to ensure the stable operation of the smelting system is a crucial factor that copper smelters must consider.

[0003] In large domestic smelting enterprises, the design of manhole doors for flue gas ducts mainly involves steel plates and bolt connections, with asbestos rope used for sealing between the manhole door and the duct. The shortcomings of this system are short service life, poor sealing performance, and significant inconvenience in disassembly and reassembly once the bolts corrode. Furthermore, if the manhole doors corrode and break down and cannot be replaced promptly, it will cause substantial flue gas pollution to the plant environment, failing to meet environmental protection requirements. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a new type of manhole door device for flue gas pipelines in the copper smelting industry.

[0005] The present invention adopts the following technical solution: A novel manhole door device for flue gas pipelines in the copper smelting industry includes a manhole cover and a manhole. A ring of flat iron is welded to the inner side of the manhole cover, and a KPI inner anti-corrosion layer is laid inside the flat iron. At least one ring of high-temperature resistant expanded PTFE tape is provided between the manhole cover and the manhole to form a soft seal. The manhole cover is pressed tightly against the outside of the manhole to form a seal.

[0006] Preferably, the manhole is provided with a plurality of metal U-shaped frames evenly arranged along the circumference of the outer edge of the manhole, and the manhole cover is provided with a plurality of slots for the metal U-shaped frames to pass through, and the manhole cover is secured with oblique pins inserted into the metal U-shaped frames.

[0007] Preferably, the outer edge of the manhole is provided with two rings of high-temperature resistant expanded PTFE tape between the manhole cover and the manhole.

[0008] Preferably, a hinged seat is fixedly welded to the outside of the manhole, and an L-shaped central swing rod is rotatably connected to the hinged seat. The manhole cover is fixedly connected to the central swing rod, and the rotation of the central swing rod causes the manhole cover to switch between the open and closed positions.

[0009] Preferably, a bearing is installed on the hinge seat between the central swing rod and the hinge seat.

[0010] Preferably, the KPI inner anti-corrosion layer is formed by casting KPI inner anti-corrosion mortar.

[0011] Preferably, the manhole cover and the central swing rod are fixedly connected by a ring chain.

[0012] The beneficial effects of this utility model are: (1) This utility model adds KPI inner anti-corrosion layer formed by KPI inner anti-corrosion mortar, which greatly extends the service life of the manhole door; (2) The manhole cover and the manhole are sealed with high temperature expanded PTFE tape, which avoids environmental problems caused by flue gas leakage and the impact on the on-site working environment; (3) The manhole cover and the manhole are connected by a U-shaped frame with a slanted pin to form a slanted locking mechanism, which avoids the situation of difficult disassembly and assembly caused by bolt corrosion; (4) The manhole cover and the manhole door are connected by a central swing rod structure, which can avoid the safety hazards caused by moving the manhole cover when opening the manhole door. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model in its closed state; Figure 2 This is a schematic diagram of the structure of this utility model in its open state; In the diagram: 1. Central swing rod, 2. Metal U-shaped frame, 3. Bearing, 4. Manhole cover, 5. KPI inner anti-corrosion layer, 6. High-temperature resistant expanded PTFE strip, 7. Angled pin, 8. Flat iron, 9. Ring chain. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: As attached Figure 1 As shown, a novel manhole door device for flue gas pipelines in the copper smelting industry includes a manhole cover 4 and a manhole. A ring of flat iron 8 is welded on the inner side of the manhole cover, and a KPI inner anti-corrosion layer 5 is laid inside the flat iron. At least one ring of high-temperature resistant expanded PTFE tape 6 is provided between the manhole cover and the manhole to form a soft seal. The manhole cover is pressed tightly against the outside of the manhole to form a seal.

[0015] Multiple metal U-shaped brackets 2 are evenly arranged around the circumference of the manhole. The manhole cover has corresponding slots for the metal U-shaped brackets to pass through. Angled pins 7 are inserted into the metal U-shaped brackets to secure the manhole cover. Two rings of high-temperature resistant expanded PTFE tape are arranged along the outer edge of the manhole, between the manhole cover and the manhole itself.

[0016] A hinged seat is fixedly welded to the outside of the manhole. An L-shaped central swing rod 1 is rotatably connected to the hinged seat. The manhole cover is fixedly connected to the central swing rod. The rotation of the central swing rod causes the manhole cover to switch between the open and closed positions.

[0017] A bearing 3 is installed on the hinge seat between the central swing rod and the hinge seat. The KPI inner anti-corrosion layer is formed by casting KPI inner anti-corrosion mortar. The manhole cover and the central swing rod are fixedly connected by a ring chain 9.

[0018] This invention adds an internal anti-corrosion layer formed by KPI inner anti-corrosion mortar, which greatly extends the service life of the manhole door; the manhole cover and the manhole are sealed with a high-temperature resistant expanded PTFE tape, avoiding environmental problems caused by flue gas leakage and its impact on the on-site working environment; the connection between the manhole cover and the manhole adopts a slanted pin U-shaped frame to form a slanted locking mechanism, avoiding difficulties in disassembly and assembly caused by bolt corrosion; the manhole cover and the manhole door adopt a central swing rod structure, which can avoid safety hazards caused by moving the manhole cover when opening the manhole door.

[0019] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A novel manhole door device for flue gas pipelines in the copper smelting industry, comprising a manhole cover and a manhole, characterized in that, A ring of flat iron is welded to the inner side of the manhole cover, and a layer of KPI inner anti-corrosion layer is laid inside the flat iron. At least one ring of high temperature resistant expanded PTFE tape is set between the manhole cover and the manhole to form a soft seal. The manhole cover is pressed tightly against the outside of the manhole to form a seal.

2. A novel manhole door device for flue gas pipelines in the copper smelting industry according to claim 1, characterized in that, Multiple metal U-shaped frames are evenly arranged around the outer edge of the manhole. Multiple slots for the metal U-shaped frames to pass through are correspondingly opened on the manhole cover. Angled pins are inserted into the metal U-shaped frames to secure the manhole cover.

3. A novel manhole door device for flue gas pipelines in the copper smelting industry according to claim 1, characterized in that, The outer edge of the manhole is provided with two rings of high-temperature resistant expanded PTFE tape between the manhole cover and the manhole.

4. A novel manhole door device for flue gas pipelines in the copper smelting industry according to claim 1, characterized in that, A hinged seat is fixedly welded to the outside of the manhole, and an L-shaped central swing rod is rotatably connected to the hinged seat. The manhole cover is fixedly connected to the central swing rod, and the rotation of the central swing rod causes the manhole cover to switch between the open and closed positions.

5. A novel manhole door device for flue gas pipelines in the copper smelting industry according to claim 4, characterized in that, A bearing is installed on the hinge seat between the central swing rod and the hinge seat.

6. A novel manhole door device for flue gas pipelines in the copper smelting industry according to claim 1, characterized in that, The KPI internal anti-corrosion layer is formed by casting KPI internal anti-corrosion mortar.

7. A novel manhole door device for flue gas pipelines in the copper smelting industry according to claim 4, characterized in that, The manhole cover and the central swing rod are fixedly connected by a ring chain.

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