A drag chain guide mechanism for air cooling island flushing system

Abstract

The utility model discloses a drag chain guide mechanism for an air-cooled island flushing system, comprising a slot box and a drag chain, wherein the drag chain can be folded to form a first drag chain portion located at the bottom and a second drag chain portion located above the first drag chain portion, wherein the bending radius of the drag chain at the folding portion is R, and the drag chain is used to receive the drag chain, and the slot box has a depth H corresponding to the folding portion of the drag chain, wherein the depth H is greater than the bending radius, so as to prevent the drag chain from being separated from the slot box. When the drag chain guide mechanism for an air-cooled island flushing system is working, the drag chain will not have problems of tilting and collapsing, and the operation is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the field of thermal power generation cooling and flushing equipment, in particular to a drag chain guide mechanism for an air cooling island flushing system. Background Art

[0002] In recent years, the air-cooled island platform has been widely used in thermal power plants in water-scarce areas in northern my country due to its excellent water-saving and economic characteristics. It is a direct air cooling technology that uses air instead of water as the cooling medium and aims to save water. At present, when the air-cooled island of a thermal power plant is automatically flushed, the hose and cable are placed in the drag chain. This method enables the flushing ladder to operate automatically when unattended.

[0003] However, the existing drag chain guide mechanism is highly simple, and because the drag chain and the hoses and cables inside it are long and heavy, the drag chain will be prone to tilt during operation or even fall out of the guide groove due to the concentrated release of stress generated by the movement of the drag chain on the drag chain body and the hoses and cables inside it, and the uneven arrangement of the hoses and cables in the drag chain will generate additional external force, causing additional torque and bending moment, thereby affecting the normal operation of the flushing system. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a drag chain guide mechanism for an air-cooled island flushing system. When the drag chain guide mechanism is working, the drag chain will not tilt or collapse, and the operation is stable and reliable.

[0005] The utility model is realized by the following technical solutions:

[0006] A drag chain guide mechanism for an air cooling island flushing system, used to store and move cables and hoses required for the flushing device, including:

[0007] A drag chain, the drag chain comprising a fixed end and a movable end, the drag chain can be folded to form a first drag chain portion located at the bottom and a second drag chain portion located above the first drag chain portion, and the bending radius of the drag chain at the folding portion is R;

[0008] The slot box is used to store the drag chain, and the depth of the slot box corresponding to the folding part of the drag chain is H, wherein the depth H> the bending radius R, so as to prevent the drag chain from escaping from the slot box.

[0009] Furthermore, the drag chain guide mechanism also includes a plurality of roller assemblies, the fixed end being fixed to the bottom of the trough box, the plurality of roller assemblies being arranged in sequence along the direction of the trough box, and the plurality of roller assemblies are all located on the side of the fixed end away from the first drag chain part, for supporting the second drag chain part.

[0010] Furthermore, the trough box includes a pair of side panels, and both ends of the roller assembly are inserted through the side panels.

[0011] Furthermore, the roller assembly includes a roller and a roller shaft, the roller shaft is inserted into the side plate, and the roller is sleeved on the outer circumference of the roller shaft and rotates around the roller shaft.

[0012] Furthermore, the trough box includes a high trough box, a low trough box and a transition trough box, the height of the high trough box is H, the height of the low trough box is h, and the height H of the high trough box is greater than the height h of the low trough box, and the transition trough box is located between the high trough box and the low trough box for connecting the high trough box and the low trough box.

[0013] Furthermore, the installation height of the roller assembly is S1, the thickness of the second drag chain portion is S2, and the height h of the low slot box is greater than the sum of the installation height S1 of the roller assembly and the thickness S2 of the second drag chain portion.

[0014] Furthermore, the drag chain guide mechanism also includes a limiting device fixed on the flushing device, the limiting device is arranged above the trough box, and the limiting device has a limiting hole, and the second drag chain part passes through the limiting hole.

[0015] Furthermore, the limiting device includes a limiting plate and a fixing plate, the limiting plate and the fixing plate are detachably connected and the limiting hole is formed therebetween, and the second drag chain part is fixed to the fixing plate after passing through the limiting hole.

[0016] Furthermore, the trough box also includes a pair of connecting members, which are fixed below the trough box and are used to connect the high trough box and the transition trough box and the low trough box and the transition trough box respectively.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. By setting trough boxes of different heights at different movement stages of the drag chain, the problem of tilting and collapsing of the drag chain during movement is solved;

[0019] 2. By arranging the roller assembly on the low trough box, most of the deadweight of the moving end of the drag chain when walking in the low trough box stage is borne by the roller assembly, which reduces the load of the drive motor and improves the reliability and service life of the system;

[0020] 3. By adding a limit plate and a fixed plate to the moving end of the drag chain, the connection area between the drag chain and the fixed plate is increased. This also avoids the situation where, when the drag chain is in the initial position, there are too few links in the flipped state, causing the moving end to bulge and generate huge stress, which may lead to the damage of the fixing device at the moving end. This increases the connection strength and stability between the drag chain and the flushing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the drag chain guide mechanism used in the air cooling island flushing system;

[0022] Figure 2 for Figure 1 Exploded diagram of

[0023] Figure 3 This is the installation diagram of the drag chain guide mechanism and the corresponding air cooling island flushing system;

[0024] Figure 4 for Figure 3 A partial schematic diagram after removing the drag chain guide mechanism;

[0025] Figure 5 for Figure 1 Schematic diagram of working status;

[0026] Figure 6 for Figure 1 Another working state diagram of .

[0027] 1. Drag chain; 11. Fixed end; 12. Moving end; 13. First drag chain part; 14. Second drag chain part; 15. Turning part; 16. Collapse part; 2. Slot box; 201. Side plate; 21. High slot box; 211. First long hole; 22. Low slot box; 221. Axis hole; 23. Transition slot box; 24. Connector; 241. Second long hole; 3. Roller assembly; 31. Roller; 32. Roller; 321. End face; 322. Pin hole; 33. Split pin; 4. Limiting device; 40. Limiting hole; 41. Limiting plate; 42. Fixed plate; 500. Air cooling tower; 510. Flushing device; 520. Driving device; 521. Driving motor; 522. Gear assembly; 523. Rack track; 530. Step channel DETAILED DESCRIPTION

[0028] The following is a further non-restrictive detailed description of the utility model technical solution in conjunction with the preferred embodiment and its accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limitations on the utility model.

[0029] like Figure 1 As shown, a drag chain guide mechanism for an air cooling island flushing system according to an embodiment of the utility model is used to store and move cables and hoses required for a flushing device 510, including a drag chain 1, a trough box 2, a roller assembly 3, and a limit device 4. One end of the drag chain 1 is fixed in the trough box 2, and the other end can move along the direction of the trough box 2 after being turned over. The roller assembly 2 is fixed in the trough box 2, and the limit device 4 is fixedly connected to the drag chain 1.

[0030] like Figure 2 As shown, the drag chain 1 includes a fixed end 11 and a movable end 12, the fixed end 11 is fixed to the bottom of the slot box 2, the drag chain 1 can be folded to form a first drag chain portion 13 located at the bottom and a second drag chain portion 14 located above the first drag chain portion 13, and the bending radius of the drag chain 1 at the folding portion is R, the slot box 2 is used to store the drag chain 1, and the depth of the slot box 2 corresponding to the folding portion of the drag chain 1 is H, wherein the depth H>bending radius R, to prevent the second drag chain portion 14 from detaching from the slot box 2.

[0031] In this embodiment, the trough box 2 includes a high trough box 21, a low trough box 22, a transition trough box 23 and a pair of connectors 24. The height of the high trough box 21 is H, the height of the low trough box 22 is h, and the height H of the high trough box 21 is greater than the height h of the low trough box 22. The transition trough box 23 is located between the high trough box 21 and the low trough box 22 and is used to connect the high trough box 21 and the low trough box 22. A pair of connectors 24 are fixed below the trough box 2, and are used to connect the high trough box 21 with the transition trough box 23 and the low trough box 22 with the transition trough box 23. Further, the trough box 2 also includes a pair of side plates 201, and a certain number of shaft holes 221 are sequentially opened on the side plates 201 located at the low trough box 22, and the fixed end 11 is fixed to the bottom of the high trough box 21 by bolts or other fasteners.

[0032] The plurality of roller assemblies 3 are sequentially arranged along the direction of the slot box 2, and are all located on the side of the fixed end 11 away from the first drag chain part 13, and are used to support the second drag chain part 14. Further, the roller assembly 3 includes a roller 31, a roller shaft 32, and a split pin 33. The roller shaft 32 is inserted into the shaft hole 221 on the side plate 201, and the roller 31 is sleeved on the outer periphery of the roller shaft 32 and rotates around the roller shaft 32. One end of the roller shaft 32 is an end face 321, and the other end is provided with a pin hole 322. When installed, the end face 321 abuts against the outer side of the side plate 201, and the split pin 33 is inserted into the pin hole 322 to fix the roller shaft 32.

[0033] like Figure 3 and Figure 4 As shown, the air-cooling island system includes an air-cooling tower 500, a flushing device 510, a driving device 520 and a step channel 530. The air-cooling tower 500 is a long strip structure with an A-shaped cross section, and the flushing device 510 is arranged along the inclined surface of the air-cooling tower 500. The driving device 520 includes a driving motor 521, a gear assembly 522 and a rack track 523. The driving motor 521 is fixed below the flushing device 510 by bolts and is fixedly connected to the gear assembly 522. The rack track 523 is arranged along the long bottom side of the air-cooling tower 500. The multiple sets of gears on the gear assembly 522 are meshed with the rack track 523 to drive the flushing device 510 to move along the inclined surface of the air-cooling tower 500. The step channel 530 is fixed between two adjacent air-cooling towers 500 and arranged along the long bottom side of the air-cooling tower 500.

[0034] In this embodiment, the side plates 201 of the high trough box 21, the low trough box 22 and the transition trough box 23 are provided with a plurality of first long holes 211 at the connection, and the connecting piece 24 located below is "U-shaped" to wrap the connection of the high trough box 21, the low trough box 22 and the transition trough box 23, and the corresponding position of the side plate of the connecting piece 24 is provided with a corresponding number of second long holes 241. During installation, the high trough box 21, the low trough box 22 and the transition trough box 23 can be connected together by simply aligning the first long holes 211 with the second long holes 241 and fixing them with bolts and nuts. The lower part of the connecting piece 24 is fixed to the channel 530 by welding at a certain distance. In this way, the purpose of fixing the high trough box 21, the low trough box 22 and the transition trough box 23 can be achieved, and the trough box 2 can be easily disassembled during installation and replacement. Furthermore, the lengths of the high trough box 21 and the low trough box 22 are each approximately equal to half of the long bottom side of the air cooling tower 500.

[0035] The limiting device 4 is arranged above the trough box 2 and fixedly connected to the lower end of the flushing device 510, and includes a limiting plate 41 and a fixing plate 42. The limiting plate 41 and the fixing plate 42 are detachably connected and a limiting hole 40 is formed between the two. The moving end 12 of the second drag chain part 14 passes through the limiting hole 40 and is fixed on the fixing plate 42. In this embodiment, the fixing plate 42 is an L-shaped bent steel plate. The bent side of the fixing plate 42 is fixedly connected to the driving device 520 by bolts, and the top plane is fixedly connected to the moving end 12 by bolts. When the drag chain 1 is installed, the fixed end 11 is fixed to the bottom of the high trough box 21 by bolts, and the moving end 12 is turned upward after extending to the left for a certain distance, and then extends to the right, and finally fixed to the fixing plate 42 by bolts, and moves along the rack track 523 with the flushing device 510. The hoses and cables required by the flushing device 510 pass through the channel inside the drag chain 1, and the ends thereof extend at the moving end 12 to communicate with the flushing device 510.

[0036] The working state of the drag chain guide mechanism embodiment for the air cooling island flushing system is referenced Figure 5 and Figure 6 When the moving end 12 of the drag chain 1 is located on the left side of the fixed end 11, the horizontal distance between the moving end 12 and the fixed end 11 is the first stroke A; when the moving end 12 is located on the right side of the fixed end 11, the horizontal distance between the moving end 12 and the fixed end 11 is the second stroke B. The lengths and proportional relationship of the first stroke A and the second stroke B in the figure are for reference only and do not represent the actual lengths and proportional relationship between the two.

[0037] like Figure 5As shown, the mobile end 12 moves to the right in the first stroke A, and the drag chain 1 flips upward from the bottom of the high groove box 21 to form a flipping portion 15, and the bending radius of the flipping portion 15 is R, wherein the height H of the high groove box 21 is greater than the bending radius R of the drag chain 1, so as to prevent the drag chain 1 body and the internal hoses and cables from flipping out of the high groove box 21 due to the concentrated release of stress generated by the movement of the drag chain. In addition, the stress of the flipping portion 15 will also cause the left side of the mobile end 12 to bulge upward, thereby causing the fixing bolts between the mobile end 12 and the fixed plate 42 to bear huge shear force, and the existence of the limit plate 41 suppresses the upward bending trend, and the stress is borne by the limit plate 41, which effectively protects the fixing bolts. Furthermore, compared with the solution in which the mobile end 12 is directly fixedly connected to the drive device 520, the use of the fixed plate 42 increases the fixing area of ​​the mobile end 12, ensuring the connection strength and stability between the mobile end 12 and the flushing device 510.

[0038] like Figure 6 As shown, the mobile end 12 continues to move rightward into the second stroke B. During this process, the part of the drag chain 1 between the flip part 15 and the mobile end 12 forms a collapsed portion 16 due to the deadweight of the body, the internal hose and the cable. The installation height of the roller assembly 3 is S1, the thickness of the second drag chain part 14 is S2, and the height h of the low groove box 22 is greater than the sum of the installation height S1 of the roller assembly 3 and the thickness S2 of the second drag chain part 14. Therefore, under the restriction of the side plate 201, even if the collapsed portion 16 moves in a left and right motion trajectory under the action of stress and vibration, the problem of detachment from the low groove box 22 will not occur. In this embodiment, multiple groups of roller assemblies 3 are arranged at the low groove box 22. When the collapsed portion 16 slides on the roller assembly 3, the rotation of the roller assembly 3 makes the movement of the drag chain 1 smoother, and since most of the deadweight of the collapsed portion 16 is borne by the roller assembly 3, the load of the drive motor 521 is also reduced, thereby improving the reliability and service life of the system.

[0039] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A drag chain guide mechanism for an air cooling island flushing system, used for storing and moving hoses and cables required for a flushing device (510), characterized in that: include: A drag chain (1), the drag chain (1) comprising a fixed end (11) and a movable end (12), the drag chain (1) being capable of being folded to form a first drag chain portion (13) located at the bottom and a second drag chain portion (14) located above the first drag chain portion (13), and the bending radius of the drag chain (1) at the folding portion is R; The trough box (2) is used to accommodate the drag chain (1), and the depth of the trough box (2) corresponding to the folded portion of the drag chain (1) is H, wherein the depth H> the bending radius R, so as to prevent the drag chain (1) from escaping from the trough box (2).

2. The drag chain guide mechanism for the air cooling island flushing system according to claim 1 is characterized in that: The drag chain guide mechanism also includes a plurality of roller assemblies (3), the fixed end (11) being fixed to the bottom of the trough box (2), the plurality of roller assemblies (3) being arranged in sequence along the direction of the trough box (2), and the plurality of roller assemblies (3) are all located on a side of the fixed end (11) away from the first drag chain portion (13), for supporting the second drag chain portion (14).

3. The drag chain guide mechanism for the air cooling island flushing system according to claim 2 is characterized in that: The trough box (2) comprises a pair of side plates (201), and both ends of the roller assembly (3) are passed through the side plates (201).

4. The drag chain guide mechanism for the air cooling island flushing system according to claim 3 is characterized in that: The roller assembly (3) comprises a roller (31) and a roller shaft (32); the roller shaft (32) is inserted through the side plate (201); and the roller (31) is sleeved on the outer circumference of the roller shaft (32) and rotates around the roller shaft (32).

5. The drag chain guide mechanism for an air cooling island flushing system according to claim 2, characterized in that: The trough box (2) comprises a high trough box (21) and a low trough box (22), the height of the high trough box (21) is H, the height of the low trough box (22) is h, and the height H of the high trough box (21) is greater than the height h of the low trough box (22).

6. The drag chain guide mechanism for the air cooling island flushing system according to claim 5 is characterized in that: The trough box (2) further comprises a transition trough box (23), wherein the transition trough box (23) is located between the high trough box (21) and the low trough box (22) and is used to connect the high trough box (21) and the low trough box (22).

7. The drag chain guide mechanism for an air cooling island flushing system according to claim 5, characterized in that: The installation height of the roller assembly (3) is S1, the thickness of the second drag chain portion (14) is S2, and the height h of the low groove box (22) is greater than the sum of the installation height S1 of the roller assembly (3) and the thickness S2 of the second drag chain portion (14).

8. The drag chain guide mechanism for an air cooling island flushing system according to claim 1, characterized in that: The drag chain guide mechanism also includes a limiting device (4) fixed on the flushing device (510), the limiting device (4) is arranged above the trough box (2), and the limiting device (4) has a limiting hole (40), and the second drag chain part (14) passes through the limiting hole (40).

9. The drag chain guide mechanism for an air cooling island flushing system according to claim 8, characterized in that: The limiting device (4) comprises a limiting plate (41) and a fixing plate (42); the limiting plate (41) and the fixing plate (42) are detachably connected and a limiting hole (40) is formed therebetween; the second drag chain portion (14) passes through the limiting hole (40) and is fixed to the fixing plate (42).

10. The drag chain guide mechanism for an air cooling island flushing system according to claim 6, characterized in that: The trough box (2) further comprises a pair of connecting members (24), which are fixed below the trough box (2) and are used to connect the high trough box (21) and the transition trough box (23) and to connect the low trough box (22) and the transition trough box (23), respectively.

Images