Online recovery device for chemical waste liquid

Abstract

The invention discloses a chemical waste liquid on-line recovery device, and belongs to the field of chemical waste liquid recovery, the chemical waste liquid on-line recovery device comprises a shell, the upper end of the shell is fixedly connected with a water inlet pipe, the bottom of the water inlet pipe is fixedly connected with a filter box, the bottom of the filter box is provided with a collection box, and the inner wall of the water inlet pipe is rotatably connected with a rotating shaft A; the outer wall of the rotating shaft A is fixedly connected with a blade plate and a connecting block A. Centrifugal rods are hinged to the two sides of the connecting block A. Through the cooperation of the gear and the toothed plate, the opening and closing control of the bottom plate is optimized. The precise opening and closing of the bottom plate can ensure that solid impurities are effectively cleaned, the bottom filter screen can be prevented from being blocked, the smooth filtration of waste liquid is ensured, and when the waste liquid passes through the equipment, the rotation of the blade plate and the generation of centrifugal force ensure that the treatment process of the waste liquid is stable and efficient. In addition, the bottom plate is always kept in a closed state, impurity leakage is avoided, and the filtering effect is ensured.

Description

Technical Field

[0001] The present application relates to the field of chemical waste liquid recovery, and more specifically, to an on-line chemical waste liquid recovery device. Background Art

[0002] Chemical waste liquid recovery refers to the process of treating, recovering, and reusing waste liquid generated during the production process of the chemical industry through certain technical means. Chemical waste liquid usually contains harmful substances such as solvents, acids, alkalis, metal ions, volatile organic compounds, etc. Therefore, its recovery and treatment are very important for environmental protection and resource reuse.

[0003] For example, the Chinese patent publication number is CN114477659A, and the technical solution disclosed in this patent document is as follows: An on-line chemical waste liquid recovery and treatment device, including: a housing and a water inlet pipe, the water inlet pipe is fixedly connected to the housing; a filtering mechanism, the filtering mechanism is arranged inside the housing and is slidably connected to the water inlet pipe; a purification mechanism, the purification mechanism is arranged between the filtering mechanism and the housing; wherein, the purification mechanism includes: a purification component, the purification component is slidably connected and arranged inside the housing; a driving air injection component; a connecting component, the connecting component is arranged between the driving air injection component and the purification component. By setting the filtering mechanism and the purification mechanism, the waste liquid can be purified multiple times, and during the secondary purification of the waste liquid by the purification component, the driving air injection component and the connecting component cooperate to greatly improve the purification effect of the purification component, so that the sewage is purified more fully and the purification efficiency is improved.

[0004] The following problems exist in the prior art: The bottom plate of the filtering box of the above device is controlled separately, and it may not be possible to recover the filtered impurities in time. At the same time, it discharges the separated grease through an oil discharge pipe, and the grease has a high viscosity, so the discharge effect may be poor. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an on-line chemical waste liquid recovery device, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present application provides an on-line chemical waste liquid recovery device, including a housing. A water inlet pipe is fixedly connected to the upper end of the housing. A filter box is fixedly connected to the bottom of the water inlet pipe. A collection box is arranged at the bottom of the filter box. A rotating shaft A is rotatably connected to the inner wall of the water inlet pipe. Blades and connecting block A are fixedly connected to the outer wall of the rotating shaft A. Centrifugal rods are hinged to both sides of the connecting block A. The other end of the centrifugal rod is fixedly connected with a centrifugal ball. A movable sleeve is movably sleeved on the outer wall of the rotating shaft A. A connecting rod D is hinged between the movable sleeve and the centrifugal rod. A notch is formed on the outer wall of the movable sleeve. A connecting rod penetrates through the top of the housing in a sliding manner. A toothed plate is fixedly connected to the bottom of the connecting rod. A rotating shaft B is rotatably connected to the inner wall of the filter box and a gear is fixedly connected to one end of the rotating shaft B. A bottom plate is fixedly connected to the outer wall of the rotating shaft B. A roller is arranged at the upper end of the connecting rod. A cleaning component and an oil drainage component are assembled inside the housing.

[0007] Preferably, a connecting block is fixedly sleeved on the outer wall of the connecting rod. A spring A is fixedly connected to the bottom of the connecting block. The bottom of the spring A is fixedly connected to the top of the housing.

[0008] Preferably, a spring B is fixedly connected to the outer wall of the water inlet pipe. The other end of the spring B is fixedly connected with a rotating block. The rotating block is rotatably connected to the movable sleeve through a bearing.

[0009] Preferably, the cleaning component includes a connecting rod A, which is fixedly connected to one end of the rotating shaft A. The other end of the connecting rod A is rotatably connected to a connecting rod B through a pin shaft. The other end of the connecting rod B is hinged to a connecting rod C. The bottom of the connecting rod C is fixedly connected with a connecting plate. The bottom of the connecting plate is fixedly connected with a moving rod. The bottom of the moving rod is fixedly connected with a scraping plate.

[0010] Preferably, the connecting rod C penetrates through the upper end of the housing in a sliding manner. The moving rod penetrates through the upper end of the filter box in a sliding manner.

[0011] Preferably, the filter net of the filter box is arranged on both sides thereof. The scraping plate is in close contact with the filter net.

[0012] Preferably, the oil drainage component includes a treatment box, which is fixedly connected to the inside of the housing. An oil separation plate is hinged to the inner wall of the treatment box. A fixed block is fixedly connected to the bottom of the bottom plate. A chute is formed in the middle of the fixed block. A hydraulic chamber is fixedly connected to the side wall of the housing. A hydraulic rod A and a hydraulic rod B are slidably connected to the two ports inside the hydraulic chamber. A groove is formed at the upper end of the hydraulic rod A and a sliding shaft is rotatably connected to the inside of the groove. The other end of the hydraulic rod B is hinged to the bottom of the oil separation plate.

[0013] Preferably, the sliding shaft is slidably connected to the inside of the chute.

[0014] The advantages of this application are as follows: (1) Through the cooperation of the gear and the toothed plate, the opening and closing control of the bottom plate is optimized. The precise opening and closing of the bottom plate can ensure that solid impurities are effectively removed, prevent the bottom filter screen from being blocked, and ensure the smooth progress of waste liquid filtration. When the waste liquid passes through the equipment, the rotation of the vane and the generation of centrifugal force ensure the stable and efficient waste liquid treatment process. In addition, the bottom plate always remains closed to avoid impurity leakage and ensure the filtration effect.

[0015] (2) The design of the cleaning component in this application uses a scraper to clean the filter screen, effectively avoiding the blockage problem that may occur after long-term operation. This design can ensure that the filter screen continuously maintains an efficient working state, avoid the accumulation of impurities affecting the filtration effect. Through the close cooperation between the scraper and the filter screen, impurities on both sides of the filter screen can be quickly and effectively removed, avoiding the accumulation of impurities during long-term use, and thus ensuring the smoothness and efficiency of the waste liquid filtration process.

[0016] (3) The oil drainage component in this application efficiently separates the oil in the waste liquid through the cooperation of the oil separation plate and the hydraulic system. The precise control of the hydraulic chamber and hydraulic rods A and B ensures that the oil separation plate can automatically adjust the angle according to the state of the waste liquid, thus achieving efficient oil separation. The automatic control of the hydraulic system enables the angle of oil separation to be precisely adjusted without manual intervention, avoiding operation errors, improving the stability and separation efficiency of the equipment. Oil has strong viscosity and is difficult to directly discharge through ordinary pipelines. By setting the oil separation plate and using hydraulic control to discharge the oil, the problem of difficult oil discharge can be effectively solved, ensuring that the oil can be smoothly discharged and improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings that form a part of this application are used to provide a further understanding of this application, making other features, purposes, and advantages of this application more obvious. The schematic embodiments and descriptions of the accompanying drawings of this application are used to explain this application and do not constitute an improper limitation of this application. In the drawings: Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the top view structural schematic diagram of the present invention; Figure 3 is the Figure 2 enlarged structural schematic diagram at A in Figure 4 is the first back sectional structural schematic diagram of the present invention; Figure 5 is the second back sectional structural schematic diagram of the present invention; Figure 6It is a schematic diagram of the partial sectional structure of the present invention; Figure 7 is of the present invention Figure 6 Schematic diagram of the enlarged structure at position B in

[0018] In the above figures, 1. Housing; 2. Water inlet pipe; 3. Filter box; 4. Collection box; 51. Rotating shaft A; 52. Blade plate; 53. Connecting block; 54. Centrifugal rod; 55. Centrifugal ball; 56. Link D; 57. Movable sleeve; 58. Notch; 59. Rotating shaft B; 510. Connecting rod; 511. Rack; 512. Gear; 513. Bottom plate; 514. Roller; 515. Connecting block; 516. Spring A; 517. Spring B; 6. Cleaning assembly; 61. Link A; 62. Link B; 63. Link C; 64. Connecting plate; 65. Moving rod; 66. Scraper; 7. Oil drainage assembly; 71. Processing box; 73. Oil separation plate; 74. Fixed block; 75. Slide groove; 76. Hydraulic chamber; 77. Hydraulic rod A; 78. Slide shaft; 79. Hydraulic rod B. Detailed implementation manners

[0019] In order to enable those skilled in the art of the present technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0021] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0022] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0023] In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail this application.

[0025] Example 1, please refer to Figures 1-5, this embodiment provides an on-line chemical waste liquid recovery device, including a housing 1. A water inlet pipe 2 is fixedly connected to the upper end of the housing 1. A filter box 3 is fixedly connected to the bottom of the water inlet pipe 2. A collection box 4 is arranged at the bottom of the filter box 3. The water inlet pipe 2 is responsible for introducing the waste liquid into the filter box 3. Inside the filter box 3, there is a filter screen for filtering particulate impurities in the waste liquid. The water inlet pipe 2 introduces the waste liquid into the system, and the filter box 3 filters out the impurities in the waste liquid through the filter screen to preliminarily purify the waste liquid. The function of the filter box 3 is to remove the particulate impurities in the waste liquid and provide a clean liquid basis for subsequent oil separation and further treatment. The inner wall of the water inlet pipe 2 is rotatably connected to a rotating shaft A51. A vane 52 and a connecting block A53 are fixedly connected to the outer wall of the rotating shaft A51. Centrifugal rods 54 are hinged on both sides of the connecting block A53. The other end of the centrifugal rod 54 is fixedly connected to a centrifugal ball 55. The rotating shaft A51 interacts with the waste liquid through the vane 52 to drive the rotating shaft A51 to rotate. The rotation of the vane 52 drives the centrifugal rods 54 and the centrifugal balls 55 to expand outwards to generate centrifugal force. An activity sleeve 57 is movably sleeved on the outer wall of the rotating shaft A51. A connecting rod D56 is hinged between the activity sleeve 57 and the centrifugal rod 54. A notch 58 is opened on the outer wall of the activity sleeve 57. A connecting rod 510 slidably penetrates through the top of the housing 1. A toothed plate 511 is fixedly connected to the bottom of the connecting rod 510. A rotating shaft B59 is rotatably connected to the inner wall of the filter box 3 and a gear 512 is fixedly connected to one end of the rotating shaft B59. The meshing movement of the toothed plate 511 and the gear 512 ensures the precise opening and closing of the bottom plate 513, optimizing the treatment of solid impurities during the waste liquid filtration process. A bottom plate 513 is fixedly connected to the outer wall of the rotating shaft B59. A roller 514 is arranged at the upper end of the connecting rod 510. A cleaning component 6 and an oil drainage component 7 are assembled inside the housing 1. A connecting block 515 is fixedly sleeved on the outer wall of the connecting rod 510. A spring A516 is fixedly connected to the bottom of the connecting block 515. The bottom of the spring A516 is fixedly connected to the top of the housing 1. The spring A516 and the spring B517 provide the reset function of the device. When the filtration ends, the spring A516 and the spring B517 reset the activity sleeve 57 and the vane 52. A spring B517 is fixedly connected to the outer wall of the water inlet pipe 2. The other end of the spring B517 is fixedly connected to a rotating block, and the rotating block is rotatably connected to the activity sleeve 57 through a bearing.

[0026] During use, the chemical waste liquid to be treated enters the filter box 3 inside the housing 1. After the sewage enters the water inlet pipe 2, the vane 52 inside it will rotate under the impact of the waste liquid, thereby driving the rotation of the rotating shaft A51. Then, the connecting block A53 on the outer wall of the rotating shaft A51 will also rotate accordingly. Since all the initial waste liquid enters the water inlet pipe 2, the rotation speeds of the vane 52 and the rotating shaft A51 are fast enough. Then, the centrifugal rod 54 and the centrifugal ball 55 hinged outside the connecting block A53 will open outward under the action of centrifugal force. At this time, the movable sleeve 57 outside the rotating shaft A51 will also rotate under the action of the connecting rod D56. Furthermore, the roller 514 located inside the notch 58 at the front end of the movable sleeve 57 will slide along the inner wall of the notch 58 at any time. Thus, the connecting rod 510 at the bottom of the roller 514 will move downward, and then the toothed plate 511 at the bottom of the connecting rod 510 will descend accordingly. Furthermore, the gear 512 engaged with the toothed plate 511 will rotate accordingly and then drive the rotation of the rotating shaft B59, so that the bottom plate 513 can rotate upward, thereby closing the bottom of the filter box 3. Thus, it can be ensured that the bottom plate 513 is in a closed state during the preliminary filtration of the waste liquid. At the same time, when the roller 514 moves out of the notch 58 and contacts the surface of the movable sleeve 57, during the outward expansion of the centrifugal rod 54 at this time, it will drive the movable sleeve 57 to move outward on the outer wall of the rotating shaft A51. Furthermore, the contact surface between the roller 514 and the movable sleeve 57 changes from the front end to the rear end. Since there is no notch 58 at the rear end, during the subsequent rotation of the movable sleeve 57, the connecting rod 510 will not move up and down. Thus, it can be ensured that the bottom plate 513 remains closed during the filtration process. When the sewage filtration is completed, then the vane 52 will gradually slow down, and then under the action of the spring B517, it will pull the movable sleeve 57 to reset. Furthermore, the contact surface between the roller 514 and the movable sleeve 57 will change back to the front end. Then, when the roller 514 is again at the notch 58 during the rotation of the movable sleeve 57, at this time, under the action of the spring A516 and the connecting block 515, it will drive the connecting rod 510 and the roller 514 back into the notch 58. Furthermore, the toothed plate 511 at the bottom of the connecting rod 510 will rise, and then drive the rotating shaft B59 and the bottom plate 513 to rotate through the gear 512, so that the bottom plate 513 opens, and then the filtered impurities will fall into the collection box 4. At the same time, the bottom of the collection box 4 is also provided with a filter screen, so that a small amount of waste liquid that has not been filtered can filter out from the bottom of the collection box 4.

[0027] Example two, please refer to Figures 1-5, the cleaning component 6 includes a connecting rod A61. The connecting rod A61 is fixedly connected to one end of the rotating shaft A51. The other end of the connecting rod A61 is rotatably connected to a connecting rod B62 through a pin shaft. The other end of the connecting rod B62 is hinged to a connecting rod C63. The bottom of the connecting rod C63 is fixedly connected to a connecting plate 64. The bottom of the connecting plate 64 is fixedly connected to a moving rod 65. The bottom of the moving rod 65 is fixedly connected to a scraper 66. The cleaning component 6 ensures the cleanliness of the filter screen inside the filter tank 3, helps maintain an efficient filtering process, and prevents a decrease in efficiency caused by blockage after long-term operation. The connecting rod C63 slides through the upper end of the housing 1, and the moving rod 65 slides through the upper end of the filter tank 3. The filter screen of the filter tank 3 is arranged on both sides thereof, and the scraper 66 is closely attached to the filter screen.

[0028] During use, when the rotating shaft A51 rotates, the connecting rod A61 at its other end will rotate around it as the center. Then, the connecting rod B62 hinged to the other end of the connecting rod A61 will drive the connecting rod C63 to move up and down reciprocally. Similarly, the connecting plate 64 at the bottom of the connecting rod C63 will also move up and down reciprocally, thereby driving the moving rod 65 to reciprocate inside the filter tank 3. Then, the filter screen on both sides of the filter tank 3 can be cleaned by the scraper 66 at its bottom. At the same time, one side of the scraper 66 close to the middle of the filter tank 3 is set as an inclined surface, so that the scraped impurities can fall on the upper end of the bottom plate 513.

[0029] Embodiment 3, please refer to Figures 1-7 , the oil drainage component 7 includes a treatment tank 71. The treatment tank 71 is fixedly connected inside the housing 1. An oil separation plate 73 is hinged to the inner wall of the treatment tank 71. A fixing block 74 is fixedly connected to the bottom of the bottom plate 513. A chute 75 is opened in the middle of the fixing block 74. A hydraulic chamber 76 is fixedly connected to the side wall of the housing 1. A hydraulic rod A77 and a hydraulic rod B79 are slidably connected inside the two ports of the hydraulic chamber 76. A groove is opened at the upper end of the hydraulic rod A77 and a sliding shaft 78 is rotatably connected inside the groove. The other end of the hydraulic rod B79 is hinged to the bottom of the oil separation plate 73. The oil drainage component 7 separates the oil in the waste liquid through the oil separation plate 73 and the hydraulic system. The oil accumulates at the upper end and is discharged through the outlet. The function of the hydraulic chamber 76 is to control the movement of the oil separation plate 73 through the hydraulic rod A77 and the hydraulic rod B79, so that it moves up and down according to the treatment state of the waste liquid for oil separation. By hydraulically controlling the angle of the oil separation plate 73, it is ensured that the oil is efficiently separated and discharged. This design precisely adjusts the separation plate through the hydraulic system, avoiding the error of manual operation, and improving the separation efficiency and the stability of the equipment. The sliding shaft 78 is slidably connected inside the chute 75.

[0030] During use, after the waste liquid is preliminarily filtered in the filter box 3, it will enter the interior of the treatment box 71 through the through hole at the upper end of the treatment box 71 and separate the oil and water through the oil separation plate 73, leaving the oil at the upper end of the separation plate. When the waste liquid is being treated, the bottom plate 513 will rotate upward, which will drive the fixed block 74 at its bottom to rise. As a result, the sliding shaft 78 sliding inside the sliding groove 75 opened therein will move upward while sliding, which will drive the hydraulic rod A 77 to move upward and outward inside the hydraulic chamber 76. Then, the hydraulic rod B 79 at the other end of the hydraulic chamber 76 will move into the hydraulic chamber 76, that is, downward, which can drive the oil separation plate 73 hinged to its upper end to rotate downward until it is parallel to the housing 1. When the waste liquid filtration is completed, at this time, the bottom plate 513 is opened downward. Then, similarly, the oil separation plate 73 will rotate upward, which can make the oil at its upper end slide out through the side outlet, solving the problem that the oil is relatively viscous and not easy to be directly discharged through the pipeline.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An on-line chemical waste liquid recycling device, comprising a housing, characterized in that, A water inlet pipe is fixedly connected to the upper end of the housing. A filter box is fixedly connected to the bottom of the water inlet pipe. A collection box is arranged at the bottom of the filter box. A rotating shaft A is rotatably connected to the inner wall of the water inlet pipe. Blades and a connecting block A are fixedly connected to the outer wall of the rotating shaft A. Centrifugal rods are hinged to both sides of the connecting block A. The other ends of the centrifugal rods are fixedly connected with centrifugal balls. A movable sleeve is movably sleeved on the outer wall of the rotating shaft A. A connecting rod D is hinged between the movable sleeve and the centrifugal rod. A notch is formed in the outer wall of the movable sleeve. A connecting rod penetrates through the top of the housing in a sliding manner. A toothed plate is fixedly connected to the bottom of the connecting rod. A rotating shaft B is rotatably connected to the inner wall of the filter box, and a gear is fixedly connected to one end of the rotating shaft B. A bottom plate is fixedly connected to the outer wall of the rotating shaft B. A roller is arranged at the upper end of the connecting rod. A cleaning component and an oil drainage component are assembled inside the housing.

2. The on-line chemical waste liquid recovery device according to claim 1, characterized in that, A connecting block B is fixedly sleeved on the outer wall of the connecting rod. A spring A is fixedly connected to the bottom of the connecting block B. The bottom of the spring A is fixedly connected to the top of the housing.

3. An on-line chemical waste liquid recovery device according to claim 1, characterized in that, A spring B is fixedly connected to the outer wall of the water inlet pipe. The other end of the spring B is fixedly connected to a rotating block. The rotating block is rotatably connected to the movable sleeve through a bearing.

4. An on-line chemical waste liquid recycling device according to claim 1, characterized in that, The cleaning component includes a connecting rod A. The connecting rod A is fixedly connected to one end of the rotating shaft A. The other end of the connecting rod A is rotatably connected to a connecting rod B through a pin shaft. The other end of the connecting rod B is hinged to a connecting rod C. A connecting plate is fixedly connected to the bottom of the connecting rod C. A moving rod is fixedly connected to the bottom of the connecting plate. A scraping plate is fixedly connected to the bottom of the moving rod.

5. An on-line chemical waste liquid recovery device according to claim 4, characterized in that, The connecting rod C penetrates through the upper end of the housing in a sliding manner. The moving rod penetrates through the upper end of the filter box in a sliding manner.

6. The on-line chemical waste liquid recycling device according to claim 5, characterized in that, The filter screen of the filter box is arranged on both sides thereof. The scraping plate is in close fit with the filter screen.

7. An on-line chemical waste liquid recovery device according to claim 6, characterized in that, The oil drainage component includes a treatment box. The treatment box is fixedly connected inside the housing. An oil separation plate is hinged to the inner wall of the treatment box. A fixing block is fixedly connected to the bottom of the bottom plate. A chute is formed in the middle of the fixing block. A hydraulic chamber is fixedly connected to the side wall of the housing. A hydraulic rod A and a hydraulic rod B are slidably connected inside the two ports of the hydraulic chamber. A groove is formed in the upper end of the hydraulic rod A, and a sliding shaft is rotatably connected inside the groove. The other end of the hydraulic rod B is hinged to the bottom of the oil separation plate.

8. An on-line chemical waste liquid recycling device according to claim 7, characterized in that, The sliding shaft is slidably connected inside the chute.

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