A high temperature resistant pneumatic switch valve for pot type calcining furnace

Abstract

The utility model discloses a high temperature resistant pneumatic switch valve for a tank calcining furnace, belonging to the technical field of tank calcining furnaces. The pneumatic switch valve includes a valve body connected to a dust collecting pipe, a mounting seat, a driving cylinder and a driving arm. The valve body includes a valve pipe and a valve stem rotatably connected in the valve pipe, and a valve plate matching the inner cavity of the valve pipe is fixedly connected to the valve stem; the mounting seat is correspondingly mounted on the side wall of the valve pipe; the driving cylinder includes a cylinder body connected to the mounting seat and a piston rod slidably connected to the front end of the cylinder body; one end of the driving arm is hinged to the front end of the piston rod, and the other end of the driving arm is hinged to one end of the valve stem. The pneumatic switch valve of the utility model can be used normally in a flue gas scene with a temperature of 1100°C, and has the advantages of simple structure, convenient operation, and easy promotion and application.

Description

Technical Field

[0001] The utility model relates to the technical field of pot-type calcining furnaces, in particular to a high-temperature resistant pneumatic switch valve used for pot-type calcining furnaces. Background Art

[0002] The pot calcining furnace is a furnace type widely used in the carbon industry. It indirectly heats the carbon material in a fixed material pot to complete the calcination process of the carbon material. When the carbon material is calcined, the raw material passes through a high temperature of more than 1200~1300℃, completes a series of physical and chemical reactions, and is discharged from the lower hopper at the bottom of the pot.

[0003] During calcination, when the temperature of the raw materials reaches 350~600℃, a large amount of volatiles in the raw materials are released, collected through the volatile channel and sent to the fire channel for combustion; at the same time, a large amount of carbon will be produced in the volatile channel, causing the effective volume in the volatile channel to decrease, affecting the gas flow. Therefore, it is necessary to regularly (once a month) purge the volatile channel with compressed air. A large amount of smoke and dust will be generated during the purge process, which seriously pollutes the environment. The collection and treatment of these smoke and dust is an effective way to solve environmental pollution.

[0004] In the prior art, a dedicated smoke collection and processing system is used to achieve the purpose of smoke collection during the volatile part purging operation. Specifically, a self-designed special rail car is used to introduce the purged smoke into the subsequent negative pressure pipeline, pass through the spiral dust collector (because the smoke temperature is high, it is not recommended to pass through the bag dust collector) into the exhaust main pipe, and finally pass through the desulfurization and denitrification tower to be discharged into the atmosphere.

[0005] There are many types of canister furnaces, such as 6-canister furnace, 12-canister furnace, 16-canister furnace, 32-canister furnace, etc. At present, the most commonly used is the 32-can combined furnace. As for the 32-can canister calcining furnace, each calcining furnace has 24 volatile channels, and a group of canister calcining furnaces includes 2 furnaces. Usually, a group of canister calcining furnaces has 48 volatile channels. When collecting the flue gas purged from the volatile channel, the negative pressure main pipe of the flue gas collection system must be equipped with 48 branch pipes corresponding to each volatile channel. Each branch pipe docking end must be equipped with a valve for separate control, and the valve is in a normally closed state, which is opened when in use and closed immediately after use. When compressed air is used to purge the volatile channel, the temperature of the flue gas entering the branch pipe is as high as about 1000℃. Therefore, ordinary switch valves are easily deformed and cannot be used when operating at such a high temperature. Therefore, it is of great significance to design a high-temperature resistant pneumatic switch valve. Utility Model Content

[0006] Technical problem to be solved: In view of the problem in the prior art that the switch valve of the tank type calcining furnace is easily damaged due to high temperature during the dust collection process, the utility model provides a high-temperature resistant pneumatic switch valve for the tank type calcining furnace. The pneumatic switch valve can be used normally in the flue gas scene with a temperature of 1100°C, and has the advantages of simple structure, easy operation, and easy promotion and application.

[0007] Technical solution: The utility model discloses a high temperature resistant pneumatic switch valve for a pot-type calcining furnace, the pneumatic switch valve comprising:

[0008] A valve body connected to the dust collecting pipe, the valve body comprising a valve pipe and a valve stem rotatably connected in the valve pipe, the valve stem being fixedly connected to a valve plate matching the inner cavity of the valve pipe;

[0009] A mounting seat, the mounting seat being correspondingly mounted on a side wall of the valve tube;

[0010] A driving cylinder, the driving cylinder comprising a cylinder body connected to a mounting seat and a piston rod slidably connected to a front end of the cylinder body;

[0011] A driving arm, one end of which is hinged to the front end of the piston rod, and the other end of which is hinged to one end of the valve stem.

[0012] Preferably, the two ends of the valve stem are respectively connected with a driving shaft end and a supporting shaft end;

[0013] The outer wall of the valve tube is provided with supporting sleeves along both ends of its diameter, and the driving shaft end and the supporting shaft end are correspondingly rotatably connected in the supporting sleeves, and the outer end of the driving shaft end extends out of the supporting sleeves.

[0014] Preferably, the valve tube is a round tube or a square tube, and the valve plate is a round plate or a square plate.

[0015] Preferably, the mounting seat comprises a second supporting channel steel fixedly connected to the outer wall of the valve tube and a first supporting channel steel vertically connected to the distal end of the second supporting channel steel, and a mounting end plate is fixedly connected to the distal end of the first supporting channel steel.

[0016] Preferably, the driving arm comprises an arc-shaped connecting rod and hinged ends respectively arranged at both ends of the arc-shaped connecting rod.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The pneumatic switch valve of the utility model can be normally used in a smoke scene with a temperature of 1100° C. and has the advantages of simple structure, convenient operation, and easy promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the layout structure of the volatile dust collection system of the utility model;

[0020] Figure 2 for Figure 1 Front view of the middle drive cylinder and mounting seat installation structure;

[0021] Figure 3 for Figure 2 Left view of the middle mounting seat structure;

[0022] Figure 4 for Figure 2 A top view of the middle mounting seat structure;

[0023] Figure 5 for Figure 1 Schematic diagram of the internal structure of the pneumatic switch valve body;

[0024] Figure 6 for Figure 5 The left view of the valve body structure of the pneumatic switch valve;

[0025] Figure 7 for Figure 2 Schematic diagram of the middle drive arm structure.

[0026] Figure numerals: 100, volatile dust collection system; 1, pot calcining furnace; 11, volatile dust collection channel; 2, dust collection rail car; 21, first movable sleeve; 22, second movable sleeve; 3, pneumatic switch valve; 31, valve body; 311, valve pipe; 312, connecting flange; 313, support sleeve; 314, drive shaft end; 315, valve stem; 316, valve plate; 317, support shaft end; 32, mounting seat; 321, first supporting channel steel; 322, second supporting channel steel; 323, mounting end plate; 33, driving cylinder; 331, cylinder body; 332, piston rod; 34, driving arm; 341, arc connecting rod; 342, hinged end; 4, dust collection duct; 41, docking branch pipe; 5, first butterfly valve; 6, dust collector; 7, air supply duct; 8, second butterfly valve; 9, desulfurization tower. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figures 1 to 7 The technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the utility model.

[0028] like Figure 1As shown, the can calcining furnace is a 32-can combined furnace type. Aiming at the smoke pollution generated during the purging operation of the volatile channel 11, these smoke dusts are collected and centrally processed, and a set of special volatile channel smoke dust collection system 100 is used to realize smoke dust collection. Specifically, the volatile fraction channel smoke collection system 100 includes a dust collection rail car 2 arranged corresponding to the volatile fraction channel 11 of the tank calcining furnace 1, a dust collection pipe 4 is suspended on the workshop dome, and the dust collection pipe 4 is provided with a docking branch pipe 41 at one end of the tank calcining furnace 1, the far end of the dust collection pipe 4 is connected to the dust collector 6, the air outlet of the dust collector 6 is docked with an air supply pipe 7, the far end of the air supply pipe 7 is connected to the desulfurization tower 9, the end of the dust collection pipe 4 is connected to the first butterfly valve 5, and the end of the air supply pipe 7 is connected to the second butterfly valve 8. After the first butterfly valve 5 and the second butterfly valve 8 are connected, the volatile fraction channel smoke collection system 100 can be connected. Under the action of the external fan, a negative pressure is generated in the system, and the purpose of collecting dust during the blowing process of the volatile fraction channel 11 can be achieved. Among them, since the tank calcining furnace is a 32-tank combination furnace, it is not economical to set up a dust collecting car for each volatile fraction channel 11. Therefore, a dust collecting rail car 2 is used to realize dust collection, and the rails are arranged correspondingly on both sides of multiple tank calcining furnaces arranged linearly. Only one dust collecting rail car 2 is needed on one side to move forward or backward along the rails to the volatile fraction channel 11 corresponding to the tank calcining furnace that needs to be purged and cleaned. The first movable sleeve 21 movably connected to one side of the dust collecting rail car 2 is moved outward to be fixedly connected to the port of the volatile fraction channel 11, and then the second movable sleeve 22 movably connected to the upper end of the dust collecting rail car 2 is lifted upward and fixedly connected to the docking branch pipe 41, so that the volatile fraction channel 11 can be connected to the dust collecting pipeline 4; it should be noted that a cyclone dust collector is also integrated on the dust collecting rail car 2, and the cyclone dust collector can perform preliminary dust collection on the large pieces of smoke generated by the purging of the volatile fraction channel 11, and the dust collector 6 performs secondary dust collection.

[0029] like Figures 1 to 7As shown, the utility model is a high-temperature resistant pneumatic switch valve for a pot-type calcining furnace, the pneumatic switch valve 3 is correspondingly connected to the lower end inlet of the docking branch pipe 41, the pneumatic switch valve 3 includes a valve body 31, a mounting seat 32, a driving cylinder 33 and a driving arm 34, the valve body 31 includes a valve pipe 311 and a valve stem 315 rotatably connected to the valve pipe 311, a connecting flange 312 is correspondingly provided at the top end of the valve pipe 311, and a valve plate 316 matching the inner cavity of the valve pipe 311 is fixedly connected to the valve stem 315; the mounting seat 32 is correspondingly installed on the side wall of the valve pipe 311; the driving cylinder 33 includes a cylinder body 331 connected to the mounting seat 32 and a piston rod 332 slidably connected to the front end of the cylinder body 331; one end of the driving arm 34 is hinged to the front end of the piston rod 332, and the other end of the driving arm 34 is hinged to one end of the valve stem 315. During operation, the driving cylinder 33 drives the driving arm 34 to rotate through the telescopic action of its piston rod 332, thereby driving the valve stem 315 and the valve plate thereon to rotate along the axial direction, thereby realizing the opening or closing of the pneumatic switch valve 3.

[0030] In a preferred embodiment, if Figures 5 and 6 As shown, the two ends of the valve stem 315 are respectively connected to the driving shaft end 314 and the supporting shaft end 317; the outer wall of the valve tube 311 is respectively provided with supporting sleeves 313 along the two ends of its diameter, and the driving shaft end 314 and the supporting shaft end 317 are correspondingly rotatably connected in the supporting sleeve 313, and the outer end of the driving shaft end 314 extends out of the supporting sleeve 313. This structure can improve the structural strength and stability of the operation of the valve stem 315.

[0031] In a preferred embodiment, if Figure 5 As shown, the valve tube 311 is a round tube or a square tube, and the valve plate 316 is a round plate or a square plate, that is, the valve plate 316 matches the inner cavity structure of the valve tube 311. For example, if the valve tube 311 adopts a square tube structure, the valve plate 316 is correspondingly set to a square structure, thereby improving the adaptability of the valve body 31.

[0032] In a specific embodiment, if Figures 2~4 As shown, the mounting seat 32 includes a second supporting channel steel 322 fixedly connected to the outer wall of the valve tube 311 and a first supporting channel steel 321 vertically connected to the far end of the second supporting channel steel 322. The far end of the first supporting channel steel 321 is fixedly connected to a mounting end plate 323, and the rear end of the cylinder body 331 of the driving cylinder is fixedly or hingedly connected to the mounting end plate 323, which is set according to requirements.

[0033] In a preferred embodiment, if Figure 7 As shown, the driving arm 34 includes an arc-shaped connecting rod 341 and hinged ends 342 respectively arranged at both ends of the arc-shaped connecting rod 341. The hinged ends 342 can be thickened to improve the connection strength and stability of the driving arm.

[0034] In a specific embodiment of the present utility model, the pneumatic switch valve 3 adopts a specific size, which is only for the purpose of illustrating the technical solution and does not limit the protection scope of the utility model.

[0035] 1. Valve body 31 manufacturing and processing:

[0036] (1) A valve tube 311 with a seamless structure of φ219×220 is manufactured, and the inner diameter of the valve tube 311 with a diameter of φ200 is turned to make the inner wall of the valve tube 311 smooth and the roundness more accurate;

[0037] (2) Valve plate 316 processing: The diameter of the valve plate 316 is φ200, which is slightly smaller than the diameter of the valve tube 311 (about 0.04 mm smaller), ensuring that the valve plate 316 can be opened and closed flexibly while also having a certain sealing performance;

[0038] (3) Processing of the support sleeve 313: The processing size of the support sleeve 313 is φ70×φ30×20;

[0039] (4) Valve stem 315 processing: the valve stem is φ30×200, the support shaft end 317 is φ30×40, and the drive shaft end 314 is φ30×50;

[0040] (5) A φ32 axial hole is opened along the diameter of the outer wall of the φ219 valve tube 311, and the support sleeve 313 is welded to the outer wall of the φ219 valve tube 311, and the valve plate, valve stem and valve tube are pre-assembled and adjusted to complete the welding;

[0041] (6) Weld the DN200 flange to the top of the valve pipe 311.

[0042] 2. According to Figures 2~4 A mounting seat 32 is manufactured and welded to the side wall of the valve tube 311 . The size of the mounting seat 32 can be freely set according to the needs and can meet the needs.

[0043] 3. Process the hinged ends 342 of the driving arm 34. The dimensions of the hinged ends 342 are φ60×φ30×20 and φ40×φ20×20 respectively. Figure 7 The arc-shaped connecting rod 341 is processed, and the hinge ends 342 are fixedly welded to the arc-shaped connecting rod 341 respectively.

[0044] 4. Press Figure 2 The driving cylinder 33 is connected to the mounting seat 32 accordingly, and the four base bolts are tightened to realize the fixed connection between the cylinder body 331 and the mounting end plate 323 .

[0045] 5. Fix and assemble the hinged end 342 of φ30 at one end of the driving arm to the driving shaft end 314, rotate the valve plate 316 to the closed position, and at the same time, when the piston rod 332 of the driving cylinder retracts into the cylinder body 331, hinge the hinged end 342 of φ20 at one end of the driving arm to the outer end of the piston rod 332, so as to complete the connection between the driving arm, the valve stem and the driving cylinder.

[0046] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A high temperature resistant pneumatic switch valve for a pot type calcining furnace, characterized in that: The pneumatic switch valve (3) comprises: A valve body (31) connected to the dust collecting pipe (4), the valve body (31) comprising a valve pipe (311) and a valve stem (315) rotatably connected to the valve pipe (311), the valve stem (315) being fixedly connected to a valve plate (316) matching the inner cavity of the valve pipe (311); A mounting seat (32), the mounting seat (32) being mounted correspondingly on a side wall of the valve tube (311); A driving cylinder (33), the driving cylinder (33) comprising a cylinder body (331) connected to a mounting seat (32) and a piston rod (332) slidably connected to a front end of the cylinder body (331); A driving arm (34), wherein one end of the driving arm (34) is hingedly connected to the front end of the piston rod (332), and the other end of the driving arm (34) is hingedly connected to one end of the valve stem (315).

2. The high temperature resistant pneumatic switch valve for a pot type calcining furnace according to claim 1, characterized in that: The two ends of the valve stem (315) are respectively connected to a driving shaft end (314) and a supporting shaft end (317); The outer wall of the valve tube (311) is provided with support sleeves (313) along both ends of its diameter, and the drive shaft end (314) and the support shaft end (317) are correspondingly rotatably connected in the support sleeves (313), and the outer end of the drive shaft end (314) extends out of the support sleeves (313).

3. The high temperature resistant pneumatic switch valve for a pot type calcining furnace according to claim 2, characterized in that: The valve tube (311) is a round tube or a square tube, and the valve plate (316) is a round plate or a square plate.

4. The high temperature resistant pneumatic switch valve for a pot type calcining furnace according to any one of claims 1 to 3, characterized in that: The mounting seat (32) comprises a second supporting channel steel (322) fixedly connected to the outer wall of the valve tube (311) and a first supporting channel steel (321) vertically connected to the far end of the second supporting channel steel (322), wherein the far end of the first supporting channel steel (321) is fixedly connected to a mounting end plate (323).

5. The high temperature resistant pneumatic switch valve for a pot type calcining furnace according to claim 4, characterized in that: The driving arm (34) comprises an arc-shaped connecting rod (341) and hinged ends (342) respectively arranged at two ends of the arc-shaped connecting rod (341).

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