Rake head grating device and rake head

Abstract

The utility model provides a rake head grating device and a rake head, and belongs to the technical field of dredging construction equipment. According to the technical scheme, the rake head grating device is installed at a suction opening of a rake head and comprises a frame, the frame is provided with a fixing part and a through opening, the fixing part is fixedly connected with the rake head, the through opening is communicated with the suction opening, and the frame is provided with a first installation end and a second installation end which are opposite in the first direction. A plurality of grid strip bodies are movably connected between the first mounting end and the second mounting end and cover the through opening, a gap is formed between every two adjacent grid strip bodies, and the grid strip bodies can move on the frame so as to adjust the size of the gaps. According to the device, the grating strip bodies are arranged between the first mounting end and the second mounting end, sundries can be effectively intercepted and prevented from entering the dredge pump, the distance between every two adjacent grating strip bodies is adjusted by moving the grating strip bodies, the applicability is improved, the reusability is improved, waste is effectively avoided, and the production and use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to dredging construction equipment technical field especially, relates to a harrow head grating device and harrow head. BACKGROUND

[0002] Maintenance dredging has the characteristics such as long waterway, wide area, thin dredging soil layer and much garbage, and there are discarded fishing nets, stones, wood blocks and other sundries in the thin soil layer, which are sucked into the mud pump through the harrow head and rake pipe during the construction process, causing the blockage of the mud pump and the damage of important components such as pump shell, increasing the maintenance cost, and the average time for cleaning the sundries in the mud pump is about 2-3 hours, reducing the construction time and seriously affecting the service life of the mud pump.

[0003] At present, the above problems are usually solved by installing a grating on the shell of the harrow head to block the sundries, but the width between the harrow head and the mud pump flow channel, as well as the size of the grating required by the different working environments are different, therefore, in actual engineering, the grating of corresponding size is often customized according to the mud pump and the working environment, different gratings need to be replaced in different environments, it is difficult to realize the multiple use of the grating, thereby causing waste and increasing the manufacturing and using cost. SUMMARY

[0004] The utility model discloses a harrow head grating device and harrow head to solve the problems of waste and increased use cost caused by the need for customization of the grating.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a harrow head grating device, installs at the suction port of harrow head, including frame, frame is equipped with fixed part and passageway, fixed part is connected with harrow head fixedly, passageway communicates with suction port, frame is equipped with opposite first installation end and second installation end along the first direction, a plurality of grating strip bodies are movably connected between first installation end and second installation end, a plurality of grating strip bodies cover passageway, and gap is equipped between adjacent two grating strip bodies, a plurality of grating strip bodies can move on the frame to adjust the size of gap, the frame is equipped with first taking and placing opening to make grating strip body can be connected with frame through first taking and placing opening. The device can effectively intercept sundries by setting grating strip bodies between first installation end and second installation end, avoid sundries into the mud pump, in addition, the distance between adjacent two grating strip bodies is adjusted by moving grating strip bodies, thereby improving the applicability, improving the reusability of the device, effectively avoiding waste and reducing the use cost.

[0007] Further, the first mounting end and the second mounting end are each provided with a first mounting groove extending along the moving direction of the grid bars, and a first taking and placing opening is formed at the groove opening of the first mounting groove. The first mounting groove comprises a first fixing groove and a first guide groove in communication. The opposite ends of each grid bar are provided with a mounting block, and the mounting block comprises a fixing block and a guide block. One end of the fixing block is fixedly connected with the grid bar, and the other end is fixedly connected with the guide block. The guide block is connected with the first guide groove in a matching mode, and the guide block is movable in the first guide groove. The outer diameter of the guide block is larger than the opening size of the first fixing groove. The fixing block is connected with the first fixing groove in a matching mode, and the fixing block and the first fixing groove are fixedly connected by a locking member to lock the movement of the grid bar. The device provides a guide and limiting action by the first guide groove and the first fixing groove. The size of the guide block is larger than the opening size of the first fixing groove, which effectively prevents the grid bar from being separated from the frame during movement, thereby ensuring the stability of the work.

[0008] Further, a first scale extending along the moving direction of the grid bars is arranged on the outer surface of the first fixing groove. The moving distance of the grid bars is more clearly shown, thereby facilitating observation and improving the accuracy of movement.

[0009] Further, the locking member comprises a locking bolt. The fixing block is provided with a fixing hole, and the first fixing groove is provided with a first locking hole extending along the extension direction thereof. The locking bolt passes through the fixing hole and the first locking hole to achieve locking. This structure is simple and facilitates locking operation.

[0010] Further, the frame is provided with opposite third and fourth mounting ends along a second direction. A plurality of grid bars are movably connected between the third and fourth mounting ends, and the plurality of grid bars are movable on the frame to adjust the gap between adjacent two grid bars. The second direction intersects the first direction, and the frame is provided with a second taking and placing opening to enable the grid bars to be connected with the frame through the second taking and placing opening. The device enables the grid bars to be installed between the third and fourth mounting ends, thereby enabling the parallel grid structure and the vertical grid structure to be converted as needed, and further improving the applicability of the device.

[0011] Further, the third and fourth mounting ends are each provided with a second mounting groove extending along the moving direction of the grid bars. A second taking and placing opening is formed at the groove opening of the second mounting groove. The second mounting groove comprises a second fixing groove and a second guide groove in communication. The opposite ends of each grid bar are provided with a mounting block, and the mounting block comprises a fixing block and a guide block. One end of the fixing block is fixedly connected with the grid bar, and the other end is fixedly connected with the guide block. The guide block is connected with the second guide groove in a matching mode, and the guide block is movable in the second guide groove. The outer diameter of the guide block is larger than the opening size of the second fixing groove. The fixing block is connected with the second fixing groove in a matching mode, and the fixing block and the second fixing groove are fixedly connected by a locking member to lock the movement of the grid bar.

[0012] Further, the frame comprises at least two horizontal beams and at least two vertical beams, the two horizontal beams are oppositely arranged, the two vertical beams are oppositely arranged, the two horizontal beams and the two vertical beams are detachably connected to form the through opening, and the two horizontal beams form the first mounting end and the second mounting end respectively, and the two vertical beams form the third mounting end and the fourth mounting end respectively.

[0013] Further, the outer surface of the second fixing groove is provided with a second scale extending along the moving direction of the grid strip.

[0014] Further, the locking member comprises a locking bolt, the fixed block is provided with a fixing hole, the second fixing groove is provided with a second locking hole extending along the extending direction of the second fixing groove, and the locking bolt passes through the fixing hole and the second locking hole to realize locking.

[0015] Further, the device comprises at least two kinds of grid strips with different lengths.

[0016] Further, the grid strip is a hard structure.

[0017] Further, the grid strip is a flexible structure.

[0018] The utility model also provides a harrow head, including the harrow head grid device and harrow head main part of any one of above-mentioned, the harrow head main part shell and suction, the shell is equipped with mounting block, and the fixed part is fixedly connected with mounting block, and the through opening is communicated with suction.

[0019] Through above technical scheme, the advantages of the utility model are:

[0020] 1, the utility model discloses a grid strip can be effectively intercepted between the first mounting end and the second mounting end, and the dirt is prevented from entering the mud pump, in addition, the distance between two adjacent grid strips is adjusted by moving the grid strip, thereby improving the applicability, improving the reusability of the device, effectively avoiding waste, and reducing the use cost.

[0021] 2, the utility model discloses the third mounting end and the fourth mounting end are arranged, so that the grid strip can be installed between the third mounting end and the fourth mounting end, thereby the parallel grid structure and the vertical grid structure can be converted according to the need, and the applicability of the device is further improved. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the utility model, the following will briefly introduce the drawings used in the description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0023] Figure 1 is a parallel structure schematic diagram of the installation of the grid strip body and the frame in an embodiment of the utility model;

[0024] Figure 2 is a structure schematic diagram of the grid strip body in an embodiment of the utility model;

[0025] Figure 3 is a left view cross section structure schematic diagram of the frame in an embodiment of the utility model;

[0026] Figure 4 is a vertical structure schematic diagram of the installation of the grid strip body and the frame in an embodiment of the utility model;

[0027] Figure 5 is a top view cross section structure schematic diagram of the frame in an embodiment of the utility model;

[0028] Figure 6 is a structure schematic diagram of the harrow head in an embodiment of the utility model.

[0029] Main figure mark explanation:

[0030] 100, harrow head main body;200, suction;300, frame;310, fixed part;320, through opening;330, first installation end;340, second installation end;350, first installation slot;351, first guide slot;352, first fixed slot;353, first locking hole;370, third installation end;380, fourth installation end;390, second installation slot;391, second fixed slot;392, second guide slot;393, second locking hole;400, grid strip body;410, fixed block;411, fixed hole;420, guide block;500, locking bolt. Specific implementation

[0031] In order to make the purpose, feature, advantage of the utility model more obvious and easy to understand, the technical scheme in the utility model will be described clearly and completely in the following by combining the drawings in the specific embodiment, obviously, the following described embodiment is only a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the patent, all other embodiments obtained by the person skilled in the art without making creative labor are within the scope of the patent protection.

[0032] Embodiment 1

[0033] Please refer to Figures 1-3, a rake head grille device is installed at the suction port 200 of the rake head, including a frame 300, the frame 300 is provided with a fixing portion 310 and a through opening 320, the fixing portion 310 is fixedly connected to the rake head, and the through opening 320 is communicated with the suction port 200, the frame 300 is provided with a first mounting end 330 and a second mounting end 340 opposite to each other along a first direction, and a plurality of grille bars 400 are movably connected between the first mounting end 330 and the second mounting end 340, the plurality of grille bars 400 cover the through opening 320, and a gap is provided between adjacent two grille bars 400, the plurality of grille bars 400 can be moved on the frame 300 to adjust the size of the gap, and the frame 300 is provided with a first take-and-place opening so that the grille bars 400 can be connected to the frame 300 through the first take-and-place opening.

[0034] In this embodiment, if Figure 1 As shown, the frame 300 is a rectangular frame 300 structure, and a through opening 320 is provided on the frame 300 along its thickness direction. A fixing portion 310 is provided on the edges of the frame 300. The outer dimensions of the frame 300 are adapted to the outer shell dimensions of the drag head. The fixing portion 310 of the frame 300 is connected to the outer shell of the drag head so that the through opening 320 is correspondingly connected to the suction port 200. The first direction can be the width direction of the frame 300, that is, the two ends of the width direction of the frame 300 are respectively provided with a first mounting end 330 and a second mounting end 340. The grille bar 400 is long. The square plate structure keeps the extension direction of the grille bar 400 consistent with the first direction and is installed between the first mounting end 330 and the second mounting end 340, so that the grille bar 400 is vertically placed at the through opening 320. A plurality of grille bars 400 are evenly spaced along the length direction of the frame 300, and there is a gap between two adjacent grille bars 400. Therefore, when the drag head is working, mud with smaller particles is sucked in and collected by the suction port 200 through the gap, while larger particles such as fishing nets, stones, and wood blocks are blocked outside by the grille bars 400, effectively preventing the debris from being sucked into the mud pump and damaging the mud pump.

[0035] In actual work, the size of the gap of the grid bars 400 should be slightly smaller than the maximum spherical diameter of the flow channel of the sludge pump. If the gap is too large, the suspended matter or sludge can pass through the grid bars 400, thereby affecting the normal operation of the subsequent treatment equipment. On the contrary, if the gap is too small, the water flow can be blocked, and the energy consumption of the pump station can be increased. In this embodiment, the plurality of grid bars 400 can also move on the frame 300 in the length direction of the frame 300, so that the gap between the adjacent two grid bars 400 can be adjusted. When it is necessary to reduce the gap between the grid bars 400, a proper number of grid bars 400 can be put into the first taking and placing opening, and the grid bars 400 are moved so that the gap between the adjacent two grid bars 400 becomes smaller. When it is necessary to increase the gap between the grid bars 400, a proper number of grid bars 400 can be taken out of the first taking and placing opening, and the grid bars 400 are moved so that the gap between the adjacent two grid bars 400 becomes larger. Thus, different working needs can be adapted, the gap between the grid bars 400 can be adjusted according to the corresponding working conditions, the applicability of the device is improved, the reusability of the device is improved, waste is effectively avoided, and the use cost is reduced.

[0036] In this embodiment, the fixed part 310 is a block provided on the outer periphery of the frame 300, and the block is provided with a threaded hole. Correspondingly, a block is welded on the outer shell of the rake head, and the block is also provided with a threaded hole. The frame 300 and the rake head are fixedly connected by bolts.

[0037] In the specific structure of the frame 300, as shown in Figure 2 , 3 , the first mounting end 330 and the second mounting end 340 are both provided with a first mounting groove 350 extending in the moving direction of the grid bars 400. The slot of the first mounting groove 350 forms a first taking and placing opening. The first mounting groove 350 includes a first fixed groove 352 and a first guide groove 351 connected in communication. The opposite ends of the grid bars 400 are both provided with mounting blocks including fixed blocks 410 and guide blocks 420. One end of the fixed block 410 is fixedly connected with the grid bar 400, and the other end is fixedly connected with the guide block 420. The guide block 420 is connected with the first guide groove 351 in a matched manner. The guide block 420 can move in the first guide groove 351. The outer diameter of the guide block 420 is larger than the opening size of the first fixed groove 352. The fixed block 410 is connected with the first fixed groove 352 in a matched manner. The fixed block 410 and the first fixed groove 352 can be fixedly connected by a locking member to lock the movement of the grid bars 400. The locking member includes a locking bolt 500. The fixed block 410 is provided with a fixed hole 411. The first fixed groove 352 is provided with a first locking hole 353 extending in the extending direction of the first fixed groove 352. The locking bolt 500 passes through the fixed hole 411 and the first locking hole 353 to achieve locking.

[0038] In the embodiment, the upper frame body of the frame 300 is the first mounting end 330, and the lower frame body is the second mounting end 340. The first mounting slot 350 is arranged in the first mounting end 330 and the second mounting end 340. The first mounting slot 350 extends along the length direction of the frame 300 and forms a slot opening at both ends in the length direction of the frame 300. The slot opening can be used as a first taking and placing opening for taking and placing the grid strip body 400. The first mounting slot 350 is divided into a first guide slot 351 located on the outer side and a first fixing slot 352 located on the inner side. The first guide slot 351 and the first fixing slot 352 extend along the length direction of the frame 300. The first fixing slot 352 is connected with the through opening 320. One end of the grid strip body 400 is connected with a fixing block 410. One end of the fixing block 410 is connected with a guide block 420. The size of the guide block 420 is greater than the size of the fixing block 410. During installation, the guide block 420 is installed in the first guide slot 351, and the fixing block 410 passes through the first fixing slot 352. During movement, the guide block 420 moves in the first guide slot 351. The first guide slot 351 and the first fixing slot 352 provide a guiding and limiting effect. In addition, the size of the guide block 420 is greater than the opening size of the first fixing slot 352, so that the grid strip body 400 is effectively prevented from being separated from the frame 300 during movement, thereby ensuring the stability of work.

[0039] The upper frame body surface of the frame body is provided with a first locking hole 353 extending along the length direction of the frame 300. The first locking hole 353 is a rectangular hole. The fixing block 410 is provided with a fixing hole 411. When the grid strip body 400 is installed on the frame 300, the fixing hole 411 is exposed outside through the first locking hole 353. When the grid strip body 400 moves, the fixing hole 411 is always in communication with the first locking hole 353. When locking is needed, the locking bolt 500 passes through the first locking hole 353 and the fixing hole 411, thereby locking the grid strip body 400. The grid strip body 400 is locked by the first locking hole 353 and the fixing hole 411, which is simple in structure and convenient to lock.

[0040] In addition, the outer surface of the first fixing slot 352 is provided with a first scale extending along the moving direction of the grid strip body 400. In order to more clearly show the moving distance of the grid strip body 400 and the gap between two adjacent grid strip bodies 400, the first scale is arranged on the upper frame body surface of the frame 300, so as to facilitate observation and improve the accuracy of movement.

[0041] In the embodiment, the grid strip body 400 can be a hard structure, or the grid strip body 400 can be a flexible structure. The hard or flexible grid strip body 400 can be selected according to the characteristics of the grid strip body 400. The grid strip body 400 can be a combination of hard and flexible structures.

[0042] Embodiment 2

[0043] Please refer to Figure 4 、 Figure 5 The utility model provides a harrow head grating device, in this embodiment 2 other structure with the structure in the embodiment 1 is basically identical, the structure that is not identical is as follows, frame 300 is equipped with opposite third mounting end 370 and fourth mounting end 380 along the second direction, a plurality of grating strip body 400 can be movably connected between third mounting end 370 and fourth mounting end 380, and a plurality of grating strip body 400 can move on frame 300 to adjust the gap between adjacent two grating strip body 400, second direction and first direction cross, frame 300 is equipped with second taking and placing mouth to make grating strip body 400 can pass through second taking and placing mouth and frame 300 cooperation connection.

[0044] In the present embodiment, the second direction is the length direction of the frame 300, the left frame body of the frame 300 is the third mounting end 370, and the right frame body is the fourth mounting end 380. The plurality of grating strip bodies 400 are installed between the third mounting end 370 and the fourth mounting end 380, so that the plurality of grating strip bodies 400 are placed horizontally at the through opening 320, and the plurality of grating strip bodies 400 can move on the frame 300 along the width direction of the frame 300, thereby adjusting the gap between adjacent two grating strip bodies 400. When it is necessary to adjust the gap between the grating strip bodies 400, the grating strip bodies 400 can be taken out through the second taking and placing mouth to appropriately increase and decrease the number of grating strip bodies 400 in the frame 300. When the grating strip bodies 400 are installed between the third mounting end 370 and the fourth mounting end 380, they form a vertical grating structure with the grating strip bodies 400 installed between the first mounting end 330 and the second mounting end 340, thereby being able to intercept smaller suspended matters and being convenient to clean, and can be applicable to occasions with poor water quality. When the grating strip bodies 400 are installed between the first mounting end 330 and the second mounting end 340 or between the third mounting end 370 and the fourth mounting end 380, a parallel grating structure is formed, which can intercept larger suspended matters and is applicable to occasions with good water quality.

[0045] In the above structure, by providing the third mounting end 370 and the fourth mounting end 380, the grating strip bodies 400 can be installed between the third mounting end 370 and the fourth mounting end 380, so that they can be converted between the parallel grating structure and the vertical grating structure as needed, further improving the applicability of the device.

[0046] In the specific structure of the third mounting end 370 and the fourth mounting end 380, consistent with the structure of the first mounting end 330 and the second mounting end 340, the third mounting end 370 and the fourth mounting end 380 are both provided with a second mounting groove 390 extending along the moving direction of the grid strip body 400, wherein the second mounting groove 390 forms a notch at both ends in the width direction of the frame 300, the notch can form a second taking and placing opening, the second mounting groove 390 includes a second fixed groove 391 and a second guide groove 392 connected in communication, the opposite ends of the grid strip body 400 are both provided with a mounting block body, the mounting block body includes a fixed block 410 and a guide block 420, one end of the fixed block 410 is fixedly connected with the grid strip body 400, the other end is fixedly connected with the guide block 420, the guide block 420 is connected with the second guide groove 392 in a matched manner, the guide block 420 can move in the second guide groove 392, the outer diameter size of the guide block 420 is greater than the opening size of the second fixed groove 391, the fixed block 410 is connected with the second fixed groove 391 in a matched manner, and the fixed block 410 and the second fixed groove 391 can be fixedly connected through a locking piece to lock the movement of the grid strip body 400. The locking piece includes a locking bolt 500, the fixed block 410 is provided with a fixing hole 411, the second fixed groove 391 is provided with a second locking hole 393 extending along the extension direction thereof, and the locking bolt 500 passes through the fixing hole 411 and the second locking hole 393 to achieve locking. A second scale extending along the moving direction of the grid strip body 400 is arranged on the outer surface of the second fixed groove 391.

[0047] The frame 300 includes at least two cross beams and at least two vertical beams, the two cross beams are oppositely arranged, the two vertical beams are oppositely arranged, the two cross beams and the two vertical beams are detachably connected to form the through opening 320, and the two cross beams form the first mounting end 330 and the second mounting end 340 respectively, and the two vertical beams form the third mounting end 370 and the fourth mounting end 380 respectively.

[0048] In the embodiment, the frame 300 is a rectangular frame structure, the two cross beams can be used as an upper frame body and a lower frame body respectively, that is, the first mounting end 330 and the second mounting end 340, and the two vertical beams can be used as a left frame body and a right frame body respectively, that is, the third mounting end 370 and the fourth mounting end 380, the two cross beams and the two vertical beams are detachably connected, which is convenient for installation, in addition, when the cross beams and the vertical beams are connected to form the frame, the notches of the first mounting groove 350 and the second mounting groove 390 are in a mutually closed state, so as to prevent the grid strip body 400 from falling off the frame 300 during use, and when the gap of the grid strip body 400 needs to be adjusted, the cross beams and the vertical beams are separated, so that the notches of the first mounting groove 350 and the second mounting groove 390 are exposed outside, which is convenient for taking and placing the grid strip body 400. In addition, the connection of the cross beams and the vertical beams can be achieved through bolt connection, which is convenient for disassembly.

[0049] In addition, according to the horizontal or vertical arrangement of the grid bars 400 on the through hole 320, the device comprises at least two grid bars 400 with different extension lengths. In the embodiment, the longer grid bars 400 are arranged horizontally on the frame 300, and the shorter grid bars 400 are arranged vertically on the frame 300, which is convenient for use.

[0050] Embodiment 3

[0051] Please refer to Figure 6 The utility model further provides a harrow head, including a harrow head grid device and harrow head main part 100, harrow head main part 100 shell and suction 200, the shell is equipped with mounting block, fixed part 310 is connected with mounting block fixedly, through -hole 320 is connected with suction 200.

[0052] The above description of disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rake head grating device mounted at the suction opening of a rake head, characterized in that, The frame is provided with a fixing portion fixedly connected with the rake head and a through opening communicated with the suction opening, and the frame is provided with opposite first and second mounting ends along a first direction, a plurality of grid bars are movably connected between the first and second mounting ends, the plurality of grid bars cover the through opening, and gaps are formed between adjacent two grid bars, the plurality of grid bars are movable on the frame to adjust the size of the gaps, and the frame is provided with a first taking and placing opening to enable the grid bars to be movably connected with the frame through the first taking and placing opening.

2. A rake head grating device according to claim 1, characterised in that The first and second mounting ends are provided with first mounting grooves extending along the moving direction of the grid bars, the groove opening of the first mounting groove forms the first taking and placing opening, the first mounting groove comprises a first fixed groove and a first guide groove which are communicated with each other, the opposite two ends of the grid bar are provided with mounting blocks, the mounting block comprises a fixed block and a guide block, one end of the fixed block is fixedly connected with the grid bar, the other end is fixedly connected with the guide block, the guide block is movably connected with the first guide groove, the outer diameter of the guide block is larger than the opening size of the first fixed groove, the fixed block is movably connected with the first fixed groove, and the fixed block and the first fixed groove are fixedly connected through a locking member to lock the movement of the grid bar.

3. A rake head grating device according to claim 2, wherein, A first scale extending along the moving direction of the grid bar is arranged on the outer surface of the first fixed groove.

4. A rake head grid arrangement according to claim 3, wherein, The locking member comprises a locking bolt, the fixed block is provided with a fixing hole, the first fixed groove is provided with a first locking hole extending along the extending direction thereof, and the locking bolt passes through the fixing hole and the first locking hole to achieve locking.

5. The rake head grating device of claim 1, wherein, The frame is provided with opposite third and fourth mounting ends along a second direction, a plurality of grid bars are movably connected between the third and fourth mounting ends, and the plurality of grid bars are movable on the frame to adjust the gaps between adjacent two grid bars, the second direction intersects with the first direction, and the frame is provided with a second taking and placing opening to enable the grid bars to be movably connected with the frame through the second taking and placing opening.

6. A rake head grating device according to claim 5, wherein, The third and fourth mounting ends are provided with second mounting grooves extending along the moving direction of the grid bars, the groove opening of the second mounting groove forms the second taking and placing opening, the second mounting groove comprises a second fixed groove and a second guide groove which are communicated with each other, the opposite two ends of the grid bar are provided with mounting blocks, the mounting block comprises a fixed block and a guide block, one end of the fixed block is fixedly connected with the grid bar, the other end is fixedly connected with the guide block, the guide block is movably connected with the second guide groove, the outer diameter of the guide block is larger than the opening size of the second fixed groove, the fixed block is movably connected with the second fixed groove, and the fixed block and the second fixed groove are fixedly connected through a locking member to lock the movement of the grid bar. And / or, the frame comprises at least two horizontal beams and at least two vertical beams, the two horizontal beams are oppositely arranged, the two vertical beams are oppositely arranged, the two horizontal beams and the two vertical beams are detachably connected to form a through opening, and the two horizontal beams form the first mounting end and the second mounting end respectively, and the two vertical beams form the third mounting end and the fourth mounting end respectively.

7. A rake head grating device according to claim 6, wherein, An outer surface of the second fixing groove is provided with a second scale extending along a moving direction of the grid strip.

8. A rake head grille arrangement according to claim 7, wherein, The locking member comprises a locking bolt, the fixing block is provided with a fixing hole, the second fixing groove is provided with a second locking hole extending along its own extension direction, and the locking bolt passes through the fixing hole and the second locking hole to achieve locking.

9. A rake head grating device according to any one of claims 1-8, characterized in that The grid strip comprises at least two grid strips with different lengths. And / or, the grid strip is a hard structure. And / or, the grid strip is a flexible structure.

10. A harrow head characterized by, The device comprises a rake head grid device and a rake head body, the rake head body is provided with a shell and a suction port, the shell is provided with a mounting block, the fixing part is fixedly connected with the mounting block, and the through opening is communicated with the suction port.

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