Sintering flue gas switching integrated valve device

Abstract

The invention provides a sintering flue gas switching integrated valve device, and relates to the technical field of sintering flue gas circulation.The sintering flue gas switching integrated valve device comprises a valve, an electric executing mechanism and a sealing mechanism, the valve comprises a valve body, a first valve port and a second valve port are formed in the top and the bottom of the valve body respectively, and a third valve port is formed in one side of the valve body; a valve plate shaft is rotationally installed at the position, close to the bottom of the third valve port, of the inner side of the valve body, and a valve plate is fixedly installed on the valve plate shaft. A flap valve in a traditional sintering flue gas circulation process is improved into a novel three-way valve, so that a single air bellow only needs two valves to meet the switching of the flow direction of flue gas, the number of air bellow valves in the sintering flue gas circulation process is reduced to half, the equipment cost is greatly reduced, and the production efficiency is improved. And compared with a single-air-box four-valve mode, the valve is smaller in occupied space and more convenient to install.

Description

Technical Field

[0001] This invention belongs to the field of sintering flue gas circulation technology, specifically an integrated valve device for switching sintering flue gas. Background Technology

[0002] Sintering flue gas recirculation technology is a key technology for energy conservation, emission reduction, and carbon reduction in the steel sintering industry. The flue gas from the head chamber of the sintering machine is characterized by high moisture content, easy material adhesion, and corrosion, while the flue gas from the tail chamber is characterized by high temperature, high dust content, easy blockage, and easy wear. Traditional process designs, such as... Figure 1 As shown, pneumatic flap valves are installed on the branch pipes of the wind box and the flue gas circulation branch pipe. Each wind box requires four flap valves, which is a large number and requires a large investment. In addition, the pneumatic flap valves used have the disadvantages of being bulky and having a tendency to lose pressure at high temperatures. The space here is small, the process layout is difficult, and collision problems often occur on site.

[0003] In summary, the present invention provides an integrated valve device for switching sintering flue gas to solve the above-mentioned problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an integrated valve device for switching sintering flue gas, which is achieved by the following specific technical means: An integrated valve device for switching sintering flue gas includes a valve, an electric actuator, and a sealing mechanism. The valve includes a valve body, with a first valve port and a second valve port respectively provided at the top and bottom of the valve body, and a third valve port provided on one side of the valve body. A valve plate shaft is rotatably mounted on the inner side of the valve body near the bottom of the third valve port, and a valve plate is fixedly mounted on the valve plate shaft. The electric actuator includes a fixed support fixedly installed on the valve body on the side away from the third valve port. A lead screw is hingedly installed on the side of the fixed support away from the valve body. A connecting frame is fitted on the outside of the lead screw. A valve stem is hingedly installed at both ends of the connecting frame. A first through hole is provided on the valve body for the valve stem to pass through. The end of the valve stem away from the connecting frame passes through the inside of the first through hole into the valve body and is hinged to the valve plate.

[0005] Furthermore, the electric actuator also includes a threaded sleeve installed between the connecting frame and the lead screw. The threaded sleeve is threadedly connected to the lead screw and is rotatably mounted on the connecting frame. A worm gear is sleeved on the outer side of the threaded sleeve. A worm is rotatably mounted on one side of the worm gear on the connecting frame and is meshed with the worm gear. A motor is also fixedly mounted on the top of the connecting frame, and the output end of the motor is connected to the worm through a coupling.

[0006] Furthermore, a U-shaped frame is fixedly connected to the outer side of the lead screw, and the connecting frame is located inside the U-shaped frame. Two limit switches are provided on the U-shaped frame along the direction of the lead screw.

[0007] Furthermore, the surface of the lead screw is fitted with corrugated tubes on both sides of the connecting frame, and the two ends of the corrugated tubes are fixedly connected to the connecting frame and the U-shaped frame, respectively.

[0008] Furthermore, the sealing mechanism consists of two parts, and the two sealing mechanisms are symmetrically arranged on both sides of the fixed support.

[0009] Furthermore, the sealing mechanism includes a sealing block fitted on the valve stem surface near the valve body, and the sealing block is spherical on the side near the valve body. The sealing mechanism also includes a fixing frame disposed on the valve body surface outside the sealing block. A sealing plate is disposed inside the fixing frame between the sealing block and the valve body surface. A second through hole is opened in the middle of the sealing plate, and the valve stem passes through the inside of the second through hole. A spherical groove with the same spherical surface as the sealing block is opened on the side of the sealing plate near the sealing block.

[0010] Furthermore, a fixing plate is fixedly installed on the side of the fixing frame away from the valve body. A third through hole is opened in the center of the fixing plate, and the valve stem passes through the inside of the third through hole. A first sealing plate and a second sealing plate are respectively fitted on the outer side of the valve stem on both sides of the fixing plate. A sealing cylinder is provided on the outer side of the valve stem on the side of the first sealing plate closer to the second sealing plate. The sealing cylinder passes through the second sealing plate and is fixedly connected to the second sealing plate by threads. Sealing rubber sheets are provided on the side of the first sealing plate and the second sealing plate closer to the fixing plate.

[0011] Furthermore, the first sealing plate is located on the side of the fixing plate near the fixing frame, and a spring is fitted on the outside of the valve stem between the first sealing plate and the second sealing plate, with the two ends of the spring abutting against the sealing block and the first sealing plate respectively.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention improves the flap valve in the traditional sintering flue gas circulation process into a new type of three-way valve, so that only two valves are needed in a single air box to meet the switching of flue gas flow direction, reducing the number of air box valves in the sintering flue gas circulation process by half, greatly reducing equipment costs. Moreover, compared with the four valves in a single air box, this valve occupies less space and is more convenient to install.

[0013] 2. The valve plate shaft of the present invention is located at the side end in the direction of the valve airflow inlet, which is different from the valve plate shaft of the traditional valve which is located at the center of the valve body. The torque transmitted to the valve plate is greater, and the valve plate can avoid problems such as jamming or inflexible rotation caused by material blockage or sticking.

[0014] 3. The electric actuator of this invention adopts a combination of lead screw sleeve and worm gear, which is more reliable than the pneumatic rod of the pneumatic flap valve and optimizes the maximum external dimensions of the equipment, providing conditions for optimizing the process layout. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the present invention after concealing the corrugated pipe; Figure 3 This is a front cross-sectional view of the present invention; Figure 4 This is the present invention. Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a three-dimensional sectional view of the present invention; Figure 6 This is the present invention. Figure 5 A magnified view of a portion of point B in the middle; Figure 7 This is a schematic diagram of a device using a traditional flap valve in a sintering flue gas recirculation process. Figure 8 This is a schematic diagram of the device for the new valve in the sintering flue gas recirculation process.

[0016] In the picture: 100. Valve; 101. Valve body; 102. First valve port; 103. Second valve port; 104. Third valve port; 105. Valve plate shaft; 106. Valve plate; 200. Electric actuator; 201. Fixed support; 202. Lead screw; 203. Connecting frame; 204. Valve stem; 205. First through hole; 206. Threaded sleeve; 207. Worm gear; 208. Worm; 209. Motor; 210. Coupling; 211. U-shaped bracket; 212. Limit switch; 213. Bellows; 300. Sealing mechanism; 301. Sealing block; 302. Fixing frame; 303. Sealing plate; 304. Second through hole; 305. Spherical groove; 306. Fixing plate; 307. Third through hole; 308. First sealing sheet; 309. Second sealing sheet; 310. Sealing cylinder; 311. Sealing rubber sheet; 312. Spring. Detailed Implementation

[0017] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0018] like Figure 1-8 As shown, the present invention provides an integrated valve 100 device for switching sintering flue gas, including a valve 100, an electric actuator 200, and a sealing mechanism 300. The valve 100 includes a valve body 101. The top and bottom of the valve body 101 are respectively provided with a first valve port 102 and a second valve port 103. A third valve port 104 is provided on one side of the valve body 101. A valve plate shaft 105 is rotatably mounted on the inner side of the valve body 101 near the bottom of the third valve port 104. A valve plate 106 is fixedly mounted on the valve plate shaft 105. The electric actuator 200 includes a fixed support 201 fixedly installed on the valve body 101 on the side away from the third valve port 104. A lead screw 202 is hingedly installed on the side of the fixed support 201 away from the valve body 101. A connecting frame 203 is fitted on the outside of the lead screw 202. A valve stem 204 is hingedly installed at both ends of the connecting frame 203. A first through hole 205 is provided on the valve body 101 for the valve stem 204 to pass through. The end of the valve stem 204 away from the connecting frame 203 passes through the inside of the first through hole 205 into the valve body 101 and is hinged to the valve plate 106.

[0019] During operation, the electric actuator 200 drives the valve plate 106 to rotate via the valve stem 204, thereby closing the second valve port 103 or the third valve port 104, allowing the flue gas to be discharged from the third valve port 104 or the second valve port 103, thus achieving the purpose of switching the flue gas flow direction according to the characteristics of the flue gas during the sintering flue gas circulation process.

[0020] The electric actuator 200 also includes a threaded sleeve 206 installed between the connecting frame 203 and the lead screw 202. The threaded sleeve 206 is threadedly connected to the lead screw 202 and is rotatably mounted on the connecting frame 203. A worm gear 207 is sleeved on the outer side of the threaded sleeve 206. A worm 208 is rotatably mounted on one side of the worm gear on the connecting frame 203 and is meshed with the worm gear 207. A motor 209 is also fixedly mounted on the top of the connecting frame 203, and the output end of the motor 209 is connected to the worm 208 through a coupling 210.

[0021] During operation, the motor 209 drives the worm 208 to rotate through the coupling 210. The worm 208 drives the worm wheel 207, which is meshed with it, to rotate. The worm wheel 207 drives the threaded sleeve 206 connected to it to rotate. Since the threaded sleeve 206 is threadedly connected to the lead screw 202, during the rotation of the threaded sleeve 206, it drives the connecting frame 203 away from or closer to the valve body 101 according to its own rotation direction, thereby changing the state of the valve plate 106 through the valve stem 204.

[0022] The lead screw 202 is fixedly connected to a U-shaped frame 211 on its outer side, and the connecting frame 203 is located on the inner side of the U-shaped frame 211. Two limit switches 212 are provided on the U-shaped frame 211 along the direction of the lead screw 202.

[0023] During operation, the limit positions of the electric actuator 200 can be controlled by two limit switches 212, thereby realizing two passage states of the valve 100. Among them, the surface of the lead screw 202 is fitted with corrugated tubes 213 on both sides of the connecting frame 203, and the two ends of the corrugated tubes 213 are fixedly connected to the connecting frame 203 and the U-shaped frame 211 respectively.

[0024] During operation, the bellows 213 will expand and contract with the moving direction of the connecting frame 203, and always cover the lead screw 202, thereby keeping the surface of the lead screw 202 clean, reducing wear and tear on the lead screw 202, and extending the service life of the lead screw 202.

[0025] The sealing mechanism 300 consists of two parts, and the two sealing mechanisms 300 are symmetrically arranged on both sides of the fixed support 201.

[0026] During operation, the two sealing mechanisms 300 are responsible for sealing between the two valve stems 204 and the valve body 101, respectively.

[0027] The sealing mechanism 300 includes a sealing block 301 fitted on the surface of the valve stem 204 near the valve body 101, and the side of the sealing block 301 near the valve body 101 is spherical. The sealing mechanism 300 also includes a fixing frame 302 provided on the surface of the valve body 101 outside the sealing block 301. A sealing plate 303 is provided inside the fixing frame 302 between the sealing block 301 and the surface of the valve body 101. A second through hole 304 is provided in the middle of the sealing plate 303, and the valve stem 204 passes through the inside of the second through hole 304. A spherical groove 305 with the same spherical surface as the sealing block 301 is provided on the side of the sealing plate 303 near the sealing block 301.

[0028] During operation, the second through hole 304 provides space for the valve stem 204 to move at the sealing plate 303. The spherical side of the sealing block 301 fits into the spherical groove 305 of the sealing plate 303 to achieve a seal, preventing the leakage of flue gas passing through the valve body 101.

[0029] A fixing plate 306 is fixedly installed on the side of the fixing frame 302 away from the valve body 101. A third through hole 307 is opened in the center of the fixing plate 306, and the valve stem 204 passes through the inside of the third through hole 307. A first sealing plate 308 and a second sealing plate 309 are respectively fitted on the outer side of the valve plate 106 on both sides of the fixing plate 306. A sealing cylinder 310 is provided on the side of the first sealing plate 308 near the second sealing plate 309 on the outer side of the valve stem 204. The sealing cylinder 310 passes through the second sealing plate 309 and is fixedly connected to the second sealing plate 309 by threads. A sealing rubber sheet 311 is provided on the side of the first sealing plate 308 and the second sealing plate 309 near the fixing plate 306.

[0030] During operation, the third through hole 307 provides space for the valve stem 204 to move at the fixed plate 306. During the movement of the valve plate 106, the third through hole 307 is sealed by the first sealing plate 308 and the second sealing plate 309, thereby preventing dust and debris from entering the fixed frame 302, reducing the wear of the sealing block 301 and the sealing plate 303, and maintaining the sealing performance of the sealing mechanism 300.

[0031] The first sealing plate 308 is located on the side of the fixing plate 306 near the fixing frame 302. A spring 312 is fitted on the outside of the valve stem 204 between the first sealing plate 308 and the second sealing plate 309, and the two ends of the spring 312 abut against the sealing block 301 and the first sealing plate 308 respectively.

[0032] During operation, the pre-compressed spring 312 causes the spherical side of the sealing block 301 to fit tightly against the spherical groove 305, achieving a sealing effect.

[0033] Specific working principle: In use, the present invention drives the worm gear 208 to rotate via the motor 209. The worm gear 208 drives the worm wheel 207, which meshes with it, to rotate. The worm wheel 207 drives the threaded sleeve 206 to rotate. Since the threaded sleeve 206 is threadedly connected to the lead screw 202, depending on the rotation direction of the threaded sleeve 206, the threaded sleeve 206 will drive the connecting frame 203, which is rotated with it, to move closer to or away from the valve body 101 on the lead screw 202. When the connecting frame 203 moves closer to the valve body 101, it will drive the valve plate 106 to rotate via the valve rod 204 until the third valve port 104 is closed. At this time, the flue gas enters from the first valve port 102 and exits from the second valve port 103. When the connecting frame 203 moves away from the valve body 101, it will drive the valve plate 106 to rotate in the opposite direction again via the valve rod 204 until the second valve port 103 is closed. At this time, the flue gas enters from the first valve port 102 and exits from the third valve port 104, thereby achieving the purpose of switching the flue gas flow direction according to the characteristics of the flue gas.

[0034] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sintering flue gas switching integrated valve (100) device, comprising a valve (100), an electric actuator (200), and a sealing mechanism (300), characterized in that: The valve (100) includes a valve body (101), with a first valve port (102) and a second valve port (103) respectively provided at the top and bottom of the valve body (101), and a third valve port (104) provided on one side of the valve body (101). A valve plate shaft (105) is rotatably mounted on the inner side of the valve body (101) near the bottom of the third valve port (104), and a valve plate (106) is fixedly mounted on the valve plate shaft (105). The electric actuator (200) includes a fixed support (201) fixedly installed on the valve body (101) on the side away from the third valve port (104). A lead screw (202) is hingedly installed on the side of the fixed support (201) away from the valve body (101). A connecting frame (203) is fitted on the outside of the lead screw (202). A valve stem (204) is hingedly installed at both ends of the connecting frame (203). A first through hole (205) is provided on the valve body (101) for the valve stem (204) to pass through. The end of the valve stem (204) away from the connecting frame (203) passes through the valve body (101) through the first through hole (205) and is hinged to the valve plate (106).

2. The sintering flue gas switching integrated valve (100) device as described in claim 1, characterized in that: The electric actuator (200) further includes a threaded sleeve (206) installed between the connecting frame (203) and the lead screw (202). The threaded sleeve (206) is threadedly connected to the lead screw (202) and is rotatably mounted on the connecting frame (203). A worm gear (207) is sleeved on the outer side of the threaded sleeve (206). A worm (208) is rotatably mounted on one side of the worm gear on the connecting frame (203) and is meshed with the worm gear (207). A motor (209) is also fixedly mounted on the top of the connecting frame (203), and the output end of the motor (209) is connected to the worm (208) through a coupling (210).

3. The sintering flue gas switching integrated valve (100) device as described in claim 2, characterized in that: A U-shaped frame (211) is fixedly connected to the outside of the lead screw (202), and the connecting frame (203) is located inside the U-shaped frame (211). Two limit switches (212) are provided on the U-shaped frame (211) along the direction of the lead screw (202).

4. The sintering flue gas switching integrated valve (100) device as described in claim 3, characterized in that: The surface of the lead screw (202) is fitted with corrugated tubes (213) on both sides of the connecting frame (203), and the two ends of the corrugated tubes (213) are fixedly connected to the connecting frame (203) and the U-shaped frame (211) respectively.

5. The sintering flue gas switching integrated valve (100) device as described in claim 1, characterized in that: The sealing mechanism (300) consists of two parts, and the two sealing mechanisms (300) are symmetrically arranged on both sides of the fixed support (201).

6. The sintering flue gas switching integrated valve (100) device as described in claim 4, characterized in that: The sealing mechanism (300) includes a sealing block (301) fitted on the surface of the valve stem (204) near the valve body (101), and the side of the sealing block (301) near the valve body (101) is spherical. The sealing mechanism (300) also includes a fixing frame (302) provided on the surface of the valve body (101) outside the sealing block (301). A sealing plate (303) is provided inside the fixing frame (302) between the sealing block (301) and the surface of the valve body (101). A second through hole (304) is provided in the middle of the sealing plate (303), and the valve stem (204) passes through the inside of the second through hole (304). A spherical groove (305) with the same spherical surface as the sealing block (301) is provided on the side of the sealing plate (303) near the sealing block (301).

7. The sintering flue gas switching integrated valve (100) device as described in claim 6, characterized in that: A fixing plate (306) is fixedly installed on the side of the fixing frame (302) away from the valve body (101). A third through hole (307) is opened in the center of the fixing plate (306), and the valve stem (204) passes through the inside of the third through hole (307). A first sealing plate (308) and a second sealing plate (309) are respectively fitted on both sides of the fixing plate (306) on the outside of the valve stem (204). A sealing cylinder (310) is provided on the side of the first sealing plate (308) near the second sealing plate (309) on the outside of the valve stem (204). The sealing cylinder (310) passes through the second sealing plate (309) and is fixedly connected to the second sealing plate (309) by threads. A sealing rubber sheet (311) is provided on the side of the first sealing plate (308) and the second sealing plate (309) near the fixing plate (306).

8. The sintering flue gas switching integrated valve (100) device as described in claim 7, characterized in that: The first sealing plate (308) is located on the side of the fixing plate (306) near the fixing frame (302). A spring (312) is fitted on the outside of the valve stem (204) between the first sealing plate (308) and the second sealing plate (309), and the two ends of the spring (312) abut against the sealing block (301) and the first sealing plate (308) respectively.

Images