Flow dividing device, flow dividing device assembly and coal conveying system of thermal power plant

Abstract

The utility model relates to a shunting device, a shunting device assembly and a coal conveying system of a thermal power plant, the shunting device is used for the coal conveying system of the thermal power plant and comprises: a shell, which is hollow and has a first end and a second end opposite to each other, the first end is provided with a coal inlet, and the second end is provided with a first coal outlet and a second coal outlet; the baffle comprises a baffle body, two first wing plates and two second wing plates, the baffle body is rotatably arranged in the shell so that the coal inlet can be selectively communicated with the first coal outlet or the second coal outlet, the baffle body is provided with a front face and a back face, and the first wing plates and the second wing plates are arranged on the front face and the back face at angles respectively; the sealing strips are arranged on the first wing plate and the second wing plate, and the sealing strips are used for sealing a gap between the first wing plate and the shell or a gap between the second wing plate and the shell. According to the flow dividing device, it can be ensured that the baffle body rotates smoothly when switched between different positions, and transmission parts involved in the rotating process of the baffle body are protected.

Description

Technical Field

[0001] The present disclosure relates to the technical field of thermal power generation, and more particularly, to a diversion device, a diversion device assembly and a coal conveying system of a thermal power plant. Background Art

[0002] The diversion device is a key device for diverting fuel from the unloading system to the coal yard and the coal feeding system, and is also a necessary device for switching and diverting the coal conveying system.

[0003] However, during the operation of the diversion device, problems such as leakage and blockage of coal often occur due to the jamming of the rotating baffle, which cannot be pushed or cannot be pushed in place. When the jamming is severe, it will cause deformation and fracture of the push rod and the crank arm, damage to the flat key at the connection between the crank arm and the main shaft, and even fracture of the main shaft, etc., resulting in the failure of the dual-channel belt conveyor to achieve the function of channel transfer and switch, and causing the coal conveying system to lose the backup of one belt conveyor. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a diversion device, a diversion device assembly and a coal conveying system of a thermal power plant, which can ensure that the baffle body can rotate smoothly when switching between different positions, so as to protect the transmission components involved in the rotation process of the baffle body.

[0005] To achieve the above object, the present disclosure provides a diversion device for a coal conveying system of a thermal power plant, including: a housing, which is hollow inside and has a first end and a second end arranged opposite to each other, the first end has a coal inlet, and the second end has a first coal outlet and a second coal outlet; a baffle, including a baffle body, two first wing plates and two second wing plates, the baffle body is rotatably arranged in the housing so that the coal inlet can be selectively communicated with the first coal outlet or the second coal outlet, the baffle body has a front side and a back side, and the two first wing plates and the two second wing plates are respectively arranged at an angle on the front side and the back side; and a sealing strip, the first wing plate and the second wing plate are provided with the sealing strip, and the sealing strip seals the gap between the first wing plate and the housing or the gap between the second wing plate and the housing.

[0006] Optionally, the sealing strip includes a first sealing strip, the first wing plate has a first side edge, the first sealing strip is arranged on the first side edge and extends along the first side edge, and the first side edge is attached to the inner wall of the housing through the first sealing strip.

[0007] Optionally, the sealing strip includes a second sealing strip, the second wing plate has a second side edge, the second sealing strip is arranged on the second side edge and extends along the second side edge, and the second side edge is attached to the inner wall of the housing through the second sealing strip.

[0008] On the basis of the above technical solution, the present disclosure also provides a diverter device assembly, which includes: a power unit, a transmission unit and the above-mentioned diverter device, the transmission unit includes two, the two transmission units are symmetrically arranged on both sides of the shell, the diverter device also includes a rotating shaft, the rotating shaft is rotatably set in the shell, the baffle body is fixedly set on the rotating shaft, and the power unit is respectively connected to the two ends of the rotating shaft through the two transmission units.

[0009] Optionally, the transmission unit includes a crank arm and a piston hydraulic cylinder, the power unit includes a hydraulic box, the input end of the piston hydraulic cylinder is connected to the hydraulic box through a pipeline, and the output end of the piston hydraulic cylinder is connected to the rotating shaft through the crank arm.

[0010] Optionally, the outer wall of the shell is also provided with a first forward limit switch and a first return limit switch arranged at intervals along the movement direction of the crank arm, and the crank arm has a first acting surface and a second acting surface arranged opposite to each other, the first acting surface is used to interfere with the first forward limit switch when the baffle body is rotated to connect the coal inlet and the first coal outlet, and the second acting surface is used to interfere with the first return limit switch when the baffle body is rotated to connect the coal inlet and the second coal outlet.

[0011] Optionally, the outer wall of the shell is also provided with a second forward limit switch and a second return limit switch arranged at intervals along the movement direction of the piston hydraulic cylinder, and the output end of the piston hydraulic cylinder is fixedly connected with a first acting member and a second acting member, the first acting member is used to interfere with the second forward limit switch when the baffle body is rotated to connect with the coal inlet and the first coal outlet, and the second acting member is used to interfere with the second return limit switch when the baffle body is rotated to connect with the coal inlet and the second coal outlet.

[0012] Optionally, the shunt device assembly further includes a fixing member. One end of the fixing member is fixed to the output end of the piston hydraulic cylinder, and the other end extends towards the housing. The first acting member includes a first rod and a second rod perpendicular to each other. The first rod is arranged parallel to the length direction of the piston hydraulic cylinder, and one end thereof is fixedly connected to the fixing member, and the other end is connected to the second rod. The second rod is perpendicular to the swing arm of the second forward limit switch, and the side of the second rod away from the first rod is used to contact the second forward limit switch; the second acting member includes a third rod and a fourth rod perpendicular to each other. The third rod is arranged parallel to the length direction of the piston hydraulic cylinder, and one end thereof is fixedly connected to the fixing member, and the other end is connected to the fourth rod. The fourth rod is perpendicular to the swing arm of the second return limit switch, and the side of the fourth rod away from the third rod is used to contact the second return limit switch; wherein, the second rod and the fourth rod are respectively located on both sides of the fixing member.

[0013] Optionally, both the first forward limit switch and the first return limit switch include two. The two first forward limit switches and the two first return limit switches are respectively symmetrically arranged on both sides of the housing and correspond to the crank arms in the two transmission units one by one; and / or, both the second forward limit switch and the second return limit switch include two. The two second forward limit switches and the two second return limit switches are respectively symmetrically arranged on both sides of the housing and correspond to the piston hydraulic cylinders in the two transmission units one by one.

[0014] On the basis of the above technical solution, the present disclosure further provides a coal conveying system for a thermal power plant, and the coal conveying system for the thermal power plant includes the above shunt device assembly.

[0015] With the above technical solution, when the diversion device provided by the present disclosure is in use, two first wing plates and two second wing plates are respectively arranged at an angle on the front and back of the baffle body, so that when the baffle body rotates to connect the coal inlet with the first coal outlet (or the second coal outlet), the first wing plate (or the second wing plate) can play a protective role on the inner wall of the housing perpendicular to the rotation axis. In this way, the coal particles falling from the coal inlet will enter the first channel (or the second channel) formed by the two first wing plates (or the two second wing plates), the baffle body, and the inner wall of the housing located between the two first wing plates (or the two second wing plates). Thereby, it can be avoided that the coal particles contact the inner wall of the housing arranged perpendicular to the rotation axis during the falling process. In this way, whether it is dry coal particles or wet coal particles, it can effectively avoid the coal particles from adhering or even hardening on the inner wall of the housing perpendicular to the rotation axis; by arranging sealing strips on the first wing plate and the first wing plate, when the baffle body rotates to connect the coal inlet with the first coal outlet or the second coal outlet, the sealing strips are used to seal the gap between the first wing plate or the second wing plate and the housing, so that the falling coal particles can be prevented from entering the gap between the first wing plate or the second wing plate and the housing, thereby causing jamming of the baffle body during the rotation process.

[0016] Therefore, on the one hand, the diversion device provided by the present disclosure can respectively arrange two first wing plates and two second wing plates at an angle on the front and back of the baffle body to avoid the coal particles from adhering to the inner wall of the housing perpendicular to the rotation axis in the housing, so as to ensure that the baffle body can rotate smoothly when switching between different positions, thereby protecting the transmission components involved in the rotation process of the baffle body; on the other hand, the diversion device provided by the present disclosure also arranges sealing strips on the first wing plate and the second wing plate to avoid the coal particles from falling into the gap between the first wing plate or the second wing plate and the housing, so as to further ensure that the baffle body can rotate smoothly when switching between different positions, thereby further protecting the transmission components involved in the rotation process of the baffle body.

[0017] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. They are used to explain the present disclosure together with the following specific implementation manners, but do not constitute a limitation to the present disclosure. In the drawings:

[0019] Figure 1 is a schematic structural diagram of a diversion device assembly provided by an exemplary embodiment of the present disclosure;

[0020] Figure 2 is a schematic structural diagram of a baffle and a rotating shaft in a diversion device provided by an exemplary embodiment of the present disclosure;

[0021] Figure 3 It is a schematic internal structure diagram of the diversion device provided by the exemplary embodiment of the present disclosure. Among them, the baffle body rotates to connect the coal inlet and the first coal outlet;

[0022] Figure 4 It is a schematic internal structure diagram of the diversion device provided by the exemplary embodiment of the present disclosure. Among them, the baffle body rotates to connect the coal inlet and the second coal outlet;

[0023] Figure 5 It is a schematic partial structure diagram of the diversion device assembly provided by the exemplary embodiment of the present disclosure;

[0024] Figure 6 It is a schematic structure diagram of the crank arm in the diversion device assembly provided by the exemplary embodiment of the present disclosure.

[0025] Explanation of reference numerals

[0026] 1 - Diversion device; 11 - Housing; 111 - First end; 111a - Coal inlet; 112 - Second end; 112a - First coal outlet; 112b - Second coal outlet; 113 - First channel; 114 - Second channel; 12 - Baffle; 121 - Baffle body; 121a - Front side; 121b - Back side; 122 - First wing plate; 122a - First side; 123 - Second wing plate; 123a - Second side; 13 - Sealing strip; 131 - First sealing strip; 132 - Second sealing strip; 14 - Rotating shaft; 2 - Power unit; 21 - Hydraulic tank; 3 - Transmission unit; 31 - Crank arm; 311 - First acting surface; 312 - Second acting surface; 32 - Piston hydraulic cylinder; 4 - First forward limit switch; 5 - First return limit switch; 6 - Second forward limit switch; 7 - Second return limit switch; 8 - First acting member; 81 - First rod; 82 - Second rod; 9 - Second acting member; 91 - Third rod; 92 - Fourth rod; 10 - Fixing member. Detailed description of the specific implementation

[0027] The following will describe the specific implementation of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise specified, the orientation terms such as "inside" and "outside" refer to "inside" and "outside" relative to the contour of the corresponding component itself. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as a limitation to the present disclosure.

[0029] The present disclosure provides a diversion device 1 for a coal conveying system in a thermal power plant. As shown in Figures 1 to 4 , the diversion device 1 includes: a housing 11, which is hollow inside and has a first end 111 and a second end 112 arranged oppositely. The first end 111 has a coal inlet 111a, and the second end 112 has a first coal outlet 112a and a second coal outlet 112b; a baffle 12, which includes a baffle body 121 and a pair of arranged first wing plates 122 and second wing plates 123. The baffle body 121 is rotatably arranged in the housing 11 so that the coal inlet 111a can be selectively communicated with the first coal outlet 112a or the second coal outlet 112b. The baffle body 121 has a front surface 121a and a back surface 121b which are relatively arranged and are respectively close to the first coal outlet 112a and the second coal outlet 112b. The pair of first wing plates 122 and second wing plates 123 are respectively arranged on both sides of the front surface 121a and the back surface 121b and are close to the inner side wall of the housing 11; and a sealing strip 13, which is arranged on the first wing plates 122 and the second wing plates 123 to seal the gap between the first wing plates 122 or the second wing plates 123 and the housing 11 when the coal inlet 111a is selectively communicated with the first coal outlet 112a or the second coal outlet 112b.

[0030] Through the above technical solution, when the diversion device 1 provided by the present disclosure is in use, by respectively arranging two first wing plates 122 and two second wing plates 123 at an angle on the front surface 121a and the back surface 121b of the baffle body 121, when the baffle body 121 rotates to a position where the coal inlet 111a communicates with the first coal outlet 112a (or the second coal outlet 112b), the first wing plate 122 (or the second wing plate 123) can protect the inner wall of the housing 11 perpendicular to the rotation axis. In this way, the coal particles falling from the coal inlet 111a will enter the first channel 113 (or the second channel 114) formed by the two first wing plates 122 (or the two second wing plates 123), the baffle body 121, and the inner wall of the housing 11 between the two first wing plates 122 (or the two second wing plates 123). Thus, it can be avoided that the coal particles contact the inner wall of the housing 11 arranged perpendicular to the rotation axis during the falling process. In this way, whether it is dry coal particles or wet coal particles, it can effectively avoid the coal particles from sticking or even hardening on the inner wall of the housing 11 perpendicular to the rotation axis; by arranging sealing strips 13 on the first wing plate 122 and the first wing plate 122, when the baffle body 121 rotates to a position where the coal inlet 111a communicates with the first coal outlet 112a or the second coal outlet 112b, the sealing strip 13 seals the gap between the first wing plate 122 or the second wing plate 123 and the housing 11, so as to avoid the falling coal particles from entering the gap between the first wing plate 122 or the second wing plate 123 and the housing 11, thereby causing jamming of the baffle body 121 during rotation.

[0031] Therefore, on the one hand, the diversion device 1 provided by the present disclosure can avoid the coal particles from sticking to the inner wall of the housing 11 perpendicular to the rotation axis by respectively arranging two first wing plates 122 and two second wing plates 123 at an angle on the front surface 121a and the back surface 121b of the baffle body 121, so as to ensure that the baffle body 121 can rotate smoothly when switching between different positions, thereby protecting the transmission components involved in the rotation process of the baffle body 121; on the other hand, the diversion device 1 provided by the present disclosure also arranges sealing strips 13 on the first wing plate 122 and the second wing plate 123 to avoid the coal particles from falling into the gap between the first wing plate 122 or the second wing plate 123 and the housing 11, so as to further ensure that the baffle body 121 can rotate smoothly when switching between different positions, thereby further protecting the transmission components involved in the rotation process of the baffle body 121.

[0032] In the exemplary embodiment provided by the present disclosure, refer to Figure 3 and Figure 4As shown in the figure, the sealing strip 13 may include a first sealing strip 131 and a second sealing strip 132. Among them, the first sealing strip 131 and the second sealing strip 132 may be arranged on the first wing plate 122 and the second wing plate 123 in the following possible implementation manners:

[0033] In the first possible implementation manner, the first wing plate 122 has a first side edge 122a, and the first sealing strip 131 is arranged on the first side edge 122a and extends along the first side edge 122a. When the baffle body 121 rotates to make the coal inlet 111a communicate with the first coal outlet 112a, the first side edge 122a is attached to the inner wall of the housing 11 through the first sealing strip 131.

[0034] In the second possible implementation manner, the second wing plate 123 has a second side edge 123a, and the second sealing strip 132 is arranged on the second side edge 123a and extends along the second side edge 123a. When the baffle body 121 rotates to make the coal inlet 111a communicate with the second coal outlet 112b, the second side edge 123a is attached to the inner wall of the housing 11 through the second sealing strip 132.

[0035] In the third possible implementation manner, the first wing plate 122 has a first side edge 122a, and the first sealing strip 131 is arranged on the first side edge 122a and extends along the first side edge 122a. When the baffle body 121 rotates to make the coal inlet 111a communicate with the first coal outlet 112a, the first side edge 122a is attached to the inner wall of the housing 11 through the first sealing strip 131. Moreover, the second wing plate 123 has a second side edge 123a, and the second sealing strip 132 is arranged on the second side edge 123a and extends along the second side edge 123a. When the baffle body 121 rotates to make the coal inlet 111a communicate with the second coal outlet 112b, the second side edge 123a is attached to the inner wall of the housing 11 through the second sealing strip 132.

[0036] In the above three implementation methods, by setting the first sealing strip 131 on the first side edge 122a of the first wing plate 122 and extending along the first side edge 122a, it is achieved that when the baffle body 121 is rotated to connect the coal inlet 111a with the first coal outlet 112a, the first sealing strip 131 can seal the gap between the first side edge 122a of the first wing plate 122 and the shell 11 to prevent coal particles from entering between the first wing plate 122 and the inner wall of the shell 11, thereby ensuring the smooth rotation of the baffle body 121. Similarly, by setting the second sealing strip 132 on the second side 123a of the second wing plate 123 and extending along the second side 123a, when the baffle body 121 rotates to connect the coal inlet 111a with the second coal outlet 112b, the second sealing strip 132 can seal the gap between the second side 123a of the second wing plate 123 and the shell 11, so as to prevent coal particles from entering between the second wing plate 123 and the inner wall of the shell 11, thereby ensuring the smooth rotation of the baffle body 121. The first sealing strip 131 and the second sealing strip 132 can be rubber sealing strips 13.

[0037] Based on the above technical solution, the present disclosure also provides a diversion device assembly, referring to Figure 1 and Figure 2 As shown in the figure, the diverter device assembly includes: a power unit 2, a transmission unit 3 and the above-mentioned diverter device 1, the transmission unit 3 includes two, the two transmission units 3 are symmetrically arranged on both sides of the shell 11, the diverter device 1 also includes a rotating shaft 14, the rotating shaft 14 is rotatably arranged in the shell 11, the baffle body 121 is fixedly arranged on the rotating shaft 14, the power unit 2 is respectively connected to the two ends of the rotating shaft 14 through the two transmission units 3, through such an arrangement, the power unit 2 can simultaneously drive the two ends of the rotating shaft 14 to rotate through the two transmission units 3 symmetrically arranged on both sides of the shell 11, so that the rotating shaft 14 can be evenly stressed and deformation can be avoided.

[0038] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1As shown in the figure, the transmission unit 3 may include a crank arm 31 and a piston hydraulic cylinder 32, the power unit 2 may include a hydraulic box 21, the input end of the piston hydraulic cylinder 32 is connected to the hydraulic box 21 through a pipeline, and the output end of the piston hydraulic cylinder 32 is connected to the rotating shaft 14 through the crank arm 31. Through such an arrangement, under the action of the hydraulic box 21, the output end of the piston hydraulic cylinder 32 will reciprocate along its own axial direction, and drive the input end of the crank arm 31 connected thereto to move synchronously, thereby driving the rotating shaft 14 connected to the output end of the crank arm 31 to rotate within a certain angle range, so that the baffle body 121 fixedly connected to the rotating shaft 14 can be driven to rotate, thereby realizing the connection between the coal inlet 111a and the first coal outlet 112a or the connection between the coal inlet 111a and the second coal outlet 112b.

[0039] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 , Figure 5 as well as Figure 6 As shown in, the outer wall of the shell 11 is also provided with a first forward limit switch 4 and a first return limit switch 5 arranged at intervals along the movement direction of the crank arm 31, and the crank arm 31 has a first action surface 311 and a second action surface 312 arranged opposite to each other. The first action surface 311 is used to conflict with the first forward limit switch 4 when the baffle body 121 rotates to the coal inlet 111a and the first coal outlet 112a. The second action surface 312 is used to conflict with the first return limit switch 5 when the baffle body 121 rotates to the coal inlet 111a and the second coal outlet 112b. Through such a setting, the current position of the crank arm 31 can be obtained according to the feedback of the first forward limit switch 4 and the first return limit switch 5. In this way, the current position of the baffle body 121 can be known according to the current position of the crank arm 31, so as to more accurately grasp the current position of the baffle body 121 and ensure whether the baffle body 121 is rotated into place.

[0040] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 5As shown, in order to more accurately obtain the current position of the baffle body 121 and avoid the amplification of the movement stroke of the toggle arm 31 due to the curved arc stroke of the toggle arm 31, once vibration occurs around, the signal of the first forward limit switch 4 or the first return limit switch 5 will disappear, and the current position of the toggle arm 31 cannot be obtained. Furthermore, the current position of the baffle body 121 cannot be obtained. Therefore, the present disclosure further provides a second forward limit switch 6 and a second return limit switch 7 which are arranged at intervals along the movement direction of the piston hydraulic cylinder 32 on the outer wall of the housing 11. The output end of the piston hydraulic cylinder 32 is fixedly connected with a first acting member 8 and a second acting member 9. The first acting member 8 is used to contact the second forward limit switch 6 when the baffle body 121 rotates to connect the coal inlet 111a with the first coal outlet 112a, and the second acting member 9 is used to contact the second return limit switch 7 when the baffle body 121 rotates to connect the coal inlet 111a with the second coal outlet 112b.

[0041] Through the above technical solution, when the first forward limit switch 4 or the first return limit switch 5 fails, the current position of the baffle body 121 can also be obtained by the contact between the second forward limit switch 6 or the second return limit switch 7 and the piston hydraulic cylinder 32. Moreover, since the piston hydraulic cylinder 32 moves linearly, the movement stroke of the output end of the piston hydraulic cylinder 32 is the same as the actual movement stroke. In this way, when the piston hydraulic cylinder 32 contacts the second forward limit switch 6 or the second return limit switch 7, its sensitivity and stability are higher. Therefore, this is further conducive to obtaining the accurate current position of the baffle body 121.

[0042] In the exemplary embodiment provided by the present disclosure, referring to Figure 5 as shown, the shunt device assembly may further include a fixing member 10, such as an angle iron. One end of the fixing member 10 is fixed to the output end of the piston hydraulic cylinder 32, and the other end extends towards the housing 11. Among them, the first acting member 8 and the second acting member 9 can be constructed in any suitable manner, and the present disclosure does not limit this.

[0043] Optionally, in order to prevent the first actuator 8 from interfering with other surrounding components during the movement of the piston hydraulic cylinder 32, the first actuator 8 may be provided to include a first rod 81 and a second rod 82 that are perpendicular to each other. The first rod 81 is arranged parallel to the length direction of the piston hydraulic cylinder 32 and one end is fixedly connected to the fixing member 10, and the other end is connected to the second rod 82. The second rod 82 is arranged perpendicular to the swing arm of the second return limit switch 6. The side of the second rod 82 away from the first rod 81 is used to abut against the second return limit switch 6. On the one hand, this can ensure that the first actuator 8 has a sufficient contact area to facilitate the triggering of the second return limit switch 6 by the second rod 82. On the other hand, abutting against the second return limit switch 6 through the arc surface can also protect the second return limit switch 6, thereby extending the service life of the second return limit switch 6.

[0044] In order to prevent the second actuator 9 from interfering with other surrounding components during the movement of the piston hydraulic cylinder 32, the second actuator 9 may be provided to include a third rod 91 and a fourth rod 92 that are perpendicular to each other. The third rod 91 is arranged parallel to the length direction of the piston hydraulic cylinder 32 and one end is fixedly connected to the fixing member 10, and the other end is connected to the fourth rod 92. The fourth rod 92 is arranged perpendicular to the swing arm of the second return limit switch 7. The side of the fourth rod 92 away from the third rod 91 is used to abut against the second return limit switch 7. Among them, the second rod 82 and the fourth rod 92 are respectively located on both sides of the fixing member 10. On the one hand, this can ensure that the second actuator 9 has a sufficient contact area to facilitate the triggering of the second return limit switch 7 by the fourth rod 92. On the other hand, abutting against the second return limit switch 7 through the arc surface can also protect the second return limit switch 7, thereby extending the service life of the second return limit switch 7.

[0045] Through the above technical solution, when the side of the second rod 82 away from the first rod 81 contacts the second forward limit switch 6, the staff will know that the baffle body 121 has rotated in place in the current state according to the feedback of the second forward limit switch 6, that is, the baffle body 121 has rotated to connect the coal inlet 111a with the first coal outlet 112a. At this time, the staff can control the upstream belt conveyor to start dropping coal through devices such as a controller. In this way, the coal particles on the upstream belt conveyor can be transported to the downstream belt conveyor corresponding to the first coal outlet 112a through the diversion device 1. Similarly, when the side of the fourth rod 92 away from the third rod 91 contacts the second return limit switch 7, the staff will know that the baffle body 121 has rotated in place in the current state according to the feedback of the second return limit switch 7, that is, the baffle body 121 has rotated to connect the coal inlet 111a with the second coal outlet 112b. At this time, the staff can control the upstream belt conveyor to start dropping coal through devices such as a controller. In this way, the coal particles on the upstream belt conveyor can be transported to the downstream belt conveyor corresponding to the second coal outlet 112b through the diversion device 1.

[0046] In the exemplary embodiment provided by the present disclosure, in order to further reliably obtain the accurate current position of the baffle body 121, it can be achieved through the following several possible ways:

[0047] In the first possible implementation manner, both the first forward limit switch 4 and the first return limit switch 5 include two. The two first forward limit switches 4 and the two first return limit switches 5 are respectively symmetrically arranged on both sides of the housing 11 and correspond one by one to the crank arms 31 in the two transmission units 3.

[0048] In the second possible implementation manner, both the second forward limit switch 6 and the second return limit switch 7 include two. The two second forward limit switches 6 and the two second return limit switches 7 are respectively symmetrically arranged on both sides of the housing 11 and correspond one by one to the piston hydraulic cylinders 32 in the two transmission units 3.

[0049] In the third possible implementation manner, both the first forward limit switch 4 and the first return limit switch 5 include two. The two first forward limit switches 4 and the two first return limit switches 5 are respectively symmetrically arranged on both sides of the housing 11 and correspond one by one to the crank arms 31 in the two transmission units 3. And, both the second forward limit switch 6 and the second return limit switch 7 include two. The two second forward limit switches 6 and the two second return limit switches 7 are respectively symmetrically arranged on both sides of the housing 11 and correspond one by one to the piston hydraulic cylinders 32 in the two transmission units 3.

[0050] In the above three implementation manners, by respectively arranging the first forward limit switch 4, the first return limit switch 5, the second forward limit switch 6, and the second return limit switch 7 on both sides of the housing 11, additional monitoring can be performed on the other side of the housing 11. In this way, even if all the limit switches on one side malfunction or are damaged, the accurate current position of the baffle body 121 can be obtained through any one of the forward limit switches and any one of the return limit switches on the other side.

[0051] On the basis of the above technical solution, the present disclosure further provides a coal conveying system for a thermal power plant, and the coal conveying system for the thermal power plant includes the above-mentioned diversion device assembly. Among them, the relevant content of the diversion device assembly has been described in detail above. To avoid repetition, the present disclosure will not elaborate herein.

[0052] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0053] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0054] In addition, any combination can be made among various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A flow diversion device, used in a coal transportation system of a thermal power plant, characterized in that: include: A shell body having a hollow interior and having a first end and a second end arranged opposite to each other, wherein the first end has a coal inlet, and the second end has a first coal outlet and a second coal outlet; a baffle, comprising a baffle body and two first wing plates and two second wing plates, wherein the baffle body is rotatably disposed in the housing so that the coal inlet can be selectively connected to the first coal outlet or the second coal outlet, the baffle body having a front face and a back face, and the two first wing plates and the two second wing plates are respectively arranged at an angle on the front face and the back face; as well as A sealing strip is provided on the first wing plate and the second wing plate, respectively, and the sealing strip seals a gap between the first wing plate and the shell or a gap between the second wing plate and the shell.

2. The flow dividing device according to claim 1, characterized in that: The sealing strip comprises a first sealing strip. The first wing plate has a first side edge. The first sealing strip is arranged on and extends along the first side edge. The first side edge is in contact with the inner wall of the housing through the first sealing strip.

3. The flow dividing device according to claim 1 or 2, characterized in that: The sealing strip comprises a second sealing strip, the second wing plate has a second side edge, the second sealing strip is arranged on the second side edge and extends along the second side edge, and the second side edge is in contact with the inner wall of the housing through the second sealing strip.

4. A flow diversion device assembly, characterized in that: include: A power unit, a transmission unit and a diversion device as described in any one of claims 1 to 3, wherein the transmission unit includes two, the two transmission units are symmetrically arranged on both sides of the shell, the diversion device also includes a rotating shaft, the rotating shaft is rotatably arranged in the shell, the baffle body is fixedly arranged on the rotating shaft, and the power unit is transmission-connected to both ends of the rotating shaft through the two transmission units respectively.

5. The flow diverter assembly according to claim 4, characterized in that: The transmission unit includes a crank arm and a piston hydraulic cylinder, the power unit includes a hydraulic box, the input end of the piston hydraulic cylinder is connected to the hydraulic box through a pipeline, and the output end of the piston hydraulic cylinder is connected to the rotating shaft through the crank arm.

6. The flow diverter assembly according to claim 5, characterized in that: The outer wall of the shell is also provided with a first forward limit switch and a first return limit switch arranged at intervals along the movement direction of the crank arm, and the crank arm has a first acting surface and a second acting surface arranged opposite to each other, the first acting surface is used to interfere with the first forward limit switch when the baffle body is rotated to connect the coal inlet and the first coal outlet, and the second acting surface is used to interfere with the first return limit switch when the baffle body is rotated to connect the coal inlet and the second coal outlet.

7. The flow diverter assembly according to claim 6, characterized in that: The outer wall of the shell is also provided with a second forward limit switch and a second return limit switch arranged at intervals along the movement direction of the piston hydraulic cylinder. The output end of the piston hydraulic cylinder is fixedly connected with a first acting member and a second acting member. The first acting member is used to interfere with the second forward limit switch when the baffle body is rotated to connect with the coal inlet and the first coal outlet, and the second acting member is used to interfere with the second return limit switch when the baffle body is rotated to connect with the coal inlet and the second coal outlet.

8. The flow diverter assembly according to claim 7, characterized in that: The flow dividing device assembly further comprises a fixing member, one end of which is fixed to the output end of the piston hydraulic cylinder, and the other end of which extends toward the housing. The first acting member comprises a first rod and a second rod perpendicular to each other, the first rod is arranged parallel to the length direction of the piston hydraulic cylinder and one end of the first rod is fixedly connected to the fixing member, and the other end is connected to the second rod, the second rod is arranged perpendicular to the swing arm of the second forward limit switch, and a side of the second rod away from the first rod is used to interfere with the second forward limit switch; The second acting member comprises a third rod and a fourth rod perpendicular to each other, the third rod is arranged parallel to the length direction of the piston hydraulic cylinder and one end of the third rod is fixedly connected to the fixing member, and the other end is connected to the fourth rod, the fourth rod is arranged perpendicular to the swing arm of the second return limit switch, and a side of the fourth rod away from the third rod is used to interfere with the second return limit switch; Wherein, the second rod and the fourth rod are respectively located on two sides of the fixing member.

9. The flow diverter assembly according to claim 7, characterized in that: The first outward limit switch and the first return limit switch each include two, the two first outward limit switches and the two first return limit switches are symmetrically arranged on both sides of the housing and correspond one to one to the crank arms in the two transmission units; and / or, The second outward limit switch and the second return limit switch each include two, and the two second outward limit switches and the two second return limit switches are symmetrically arranged on both sides of the housing and correspond one-to-one to the piston hydraulic cylinders in the two transmission units.

10. A coal transportation system for a thermal power plant, characterized in that: Comprising a diverter device assembly according to any one of claims 4 to 9.

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