Ton bag unpacking device

Abstract

The utility model relates to the technical field of ton bag opening, and discloses a ton bag opening device which comprises a bottom plate, a support is fixedly connected to the top of the bottom plate, a feeding box is fixedly connected to the inner wall of the support, the bottom of the feeding box is communicated with a feeding hopper, and two side baffles are fixedly connected to the right side of the outer wall of the feeding box. A rotating plate is rotatably connected to the inner wall of the feeding box, a leaking plate is fixedly connected to the bottom of the rotating plate, a plurality of leaking holes are formed in the outer wall of the leaking plate, the same limiting supporting plate is fixedly connected to the bottoms of the two side baffles, and a plurality of knife rests are fixedly connected to the upper middle portion of the inner wall of the feeding hopper. According to the utility model, the feeding is designed to be side feeding, and after the ton bag is in contact with the bushing plate, the bushing plate is utilized to drive the rotating plate to rotate to shield the feeding hole, so that the feeding box, the rotating plate, the bushing plate and the side baffle plate form a relatively closed space, the dust overflow in the unpacking process is effectively avoided, the working environment is improved, and the material loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ton bag opening technology, and in particular to a ton bag opening device. Background Technology

[0002] Ton bag opening is the process of opening and unloading ton bags containing various powdery or granular materials. It is used in the chemical, building materials, food, and mining industries. In industrial production, ton bags are used as large-capacity packaging containers for storing and transporting materials such as cement, fertilizer, grain, and plastic granules. Ton bag opening is a key step in the process of materials moving from storage to production, and its efficiency and safety directly affect the continuity of the production line and the material loss rate.

[0003] Traditional ton bag opening relies on manual operation. Operators use knives or scissors to open the top of the ton bag, and then manually shake or tilt the bag to let the material flow out. This method of opening bags is extremely inefficient, and the operation of a single bag takes a long time, making it difficult to meet the material supply needs of large-scale production. During the operation, materials are spilled, resulting in material waste and increased production costs. In addition, a large amount of dust is generated when opening bags manually, which not only pollutes the working environment and endangers the health of operators, but also causes dust explosions.

[0004] Existing technologies have developed automated ton bag opening devices to address the problem of manual bag opening. These devices use an overhead hoisting method for vertical unloading of ton bags, replacing manual operation with a mechanical structure. However, in actual use, the height difference between the opening of the ton bag and the receiving equipment below causes a strong impact and dust generation when the material falls. A large amount of dust spreads into the workshop environment. To control the dust, companies need to configure additional dust removal equipment, increasing equipment investment and operating costs. At the same time, the overhead hoisting method makes it difficult to achieve a closed operation and cannot solve the problem of dust spillage. Therefore, this ton bag opening device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a ton bag opening device, which aims to improve the problem that the existing technology of upper hoisting and unloading of materials is difficult to achieve closed operation and cannot solve the problem of dust overflow.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a ton bag opening device, including a base plate, a bracket fixedly connected to the top of the base plate, a feeding box fixedly connected to the inner wall of the bracket, a feeding hopper connected to the bottom of the feeding box, two side baffles fixedly connected to the right side of the outer wall of the feeding box, a rotating plate rotatably connected to the inner wall of the feeding box, a drain plate fixedly connected to the bottom of the rotating plate, multiple drain holes opened on the outer wall of the drain plate, a same limiting support plate fixedly connected to the bottom of both side baffles, multiple knife holders fixedly connected to the upper middle part of the inner wall of the feeding hopper, a same vertical rod fixedly connected to the top of the multiple knife holders, side knives fixedly connected to the top of the multiple knife holders, a piercing knife fixedly connected to the top of the vertical rod, and a filtering mechanism provided inside the feeding hopper, the filtering mechanism being used to filter the fragments that fall off the bag after being cut by the blades during the opening process.

[0007] As a further description of the above technical solution:

[0008] The filtration mechanism includes a filter disc, the outer wall of which is slidably connected to the inner wall of the feed hopper. Sliding strips are fixedly connected to both the left and right sides of the outer wall of the filter disc. Sliding grooves are opened on both the left and right sides of the inner wall of the feed hopper. A locking block is fixedly connected to the front side of the outer wall of the filter disc. A locking groove is opened on the front side of the outer wall of the feed hopper. A pull ring is fixedly connected to the front side of the outer wall of the locking block. Two locking plates are rotatably connected to the outer wall of the feed hopper.

[0009] As a further description of the above technical solution:

[0010] Each of the multiple tool holders has two reinforcing plates fixedly connected to its outer wall, and the bottom of the limiting support plate is fixedly connected to a reinforcing frame.

[0011] As a further description of the above technical solution:

[0012] The outer walls of both side baffles are provided with multiple weight-reducing holes, and the top of the bottom plate is fixedly connected to a support platform.

[0013] As a further description of the above technical solution:

[0014] A servo motor is fixedly connected to the top of the support platform, and multiple cylindrical frames are fixedly connected to the top of the base plate.

[0015] As a further description of the above technical solution:

[0016] The bottom of the feed hopper is connected to a transmission cylinder, and the outer diameter of the transmission cylinder is the same as the inner diameter of the cylinder frame.

[0017] As a further description of the above technical solution:

[0018] The output end of the servo motor is fixedly connected to a drive shaft, and a screw ribbon is fixedly connected to the outer wall of the drive shaft.

[0019] As a further description of the above technical solution:

[0020] A collection chamber is fixedly connected to the top of the base plate, and a chamber cover is fixedly connected to the top of the collection chamber.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by designing the feeding as a side feeding, and after the ton bag comes into contact with the perforated plate, the perforated plate drives the rotating plate to rotate and block the feeding port, so that the feeding box, rotating plate, perforated plate and side baffle form a relatively closed space, which effectively avoids dust overflow during the opening process, improves the working environment and reduces material loss. At the same time, by opening multiple perforations on the perforated plate, the material can fall smoothly into the feeding hopper under the action of gravity after the ton bag is cut open, avoiding material residue and improving the opening efficiency.

[0023] 2. In this utility model, by embedding the sliding strips on the left and right sides of the outer wall of the filter disc into the sliding grooves on the inner wall of the hopper, the filter disc is precisely guided during sliding, enhancing its working stability and preventing deviation from affecting the filtration effect. At the same time, a filter screen is set on the surface of the filter disc, so that the fragments of the ton bag are effectively intercepted during the falling process of the material into the feed hopper, allowing only materials of qualified particle size to pass through, thereby preventing impurities from entering the subsequent conveying or processing stages and effectively ensuring the quality of the material. Attached Figure Description

[0024] Figure 1 This is a perspective view of the ton bag opening device proposed in this utility model;

[0025] Figure 2 This is a front view of the ton bag opening device proposed in this utility model;

[0026] Figure 3 This is a partial structural cross-sectional view of the ton bag opening device proposed in this utility model;

[0027] Figure 4 This is a cross-sectional view of the feed box of the ton bag opening device proposed in this utility model;

[0028] Figure 5 This is a structural exploded view of the filter mechanism of the ton bag opening device proposed in this utility model.

[0029] Legend:

[0030] 1. Base plate; 2. Filtration mechanism; 201. Filter disc; 202. Sliding strip; 203. Slide groove; 204. Locking block; 205. Locking groove; 206. Pull ring; 207. Locking plate; 3. Bracket; 4. Feed box; 5. Feed hopper; 6. Side baffle; 7. Rotating plate; 8. Straining plate; 9. Straining hole; 10. Limiting support plate; 11. Knife holder; 12. Vertical rod; 13. Side knife; 14. Edge bar; 15. Reinforcing plate; 16. Reinforcing frame; 17. Weight reduction hole; 18. Support platform; 19. Servo motor; 20. Cylinder frame; 21. Transmission cylinder; 22. Drive shaft; 23. Screw ribbon; 24. Collection bin; 25. Bin cover. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] See attached document Figure 1 Appendix Figure 3 and attached Figure 4This utility model provides an embodiment of a ton bag opening device, including a base plate 1. A bracket 3 is fixedly connected to the top of the base plate 1, supporting and fixing a feeding box 4, providing a stable installation foundation for the feeding box 4, and ensuring that the feeding box 4 does not shake during operation. The feeding box 4 is fixedly connected to the inner wall of the bracket 3. The feeding box 4 is used to accommodate ton bags and provide a relatively enclosed opening space to prevent dust from spilling out during the opening process. A feeding hopper 5 is connected to the bottom of the feeding box 4, which is used to receive the material falling from the ton bag after opening and guide the material to subsequent processing stages. Two... Side baffle 6, in conjunction with rotating plate 7, forms a closed space when rotating plate 7 rotates to block the feed inlet, further enhancing the dustproof effect. Rotating plate 7 is rotatably connected to the inner wall of feed box 4. Rotating plate 7 rotates under the pressure of the ton bag, blocking the feed inlet of feed box 4, thus sealing the internal space of feed box 4 and preventing dust from flying. A perforated plate 8 is fixedly connected to the bottom of rotating plate 7. Perforated plate 8 supports the ton bag, and multiple perforations 9 on its outer wall provide channels for material to fall, allowing the material to smoothly enter the feed hopper 5. The perforations 9 on the outer wall of perforated plate 8 ensure material passage while preventing larger impurities from passing through. The material is initially intercepted. The bottom of both side baffles 6 is fixedly connected to the same limiting support plate 10. The limiting support plate 10 is used to limit the initial position of the rotating plate 7. When there is no pressure from the ton bag, the rotating plate 7 connects to the limiting support plate 10 under its own weight. Multiple knife holders 11 are fixedly connected to the upper part of the inner wall of the feed hopper 5. The knife holders 11 are used to install and fix the bag-breaking knives, providing stable support for the knives. The top of each of the multiple knife holders 11 is fixedly connected to the same vertical rod 12. The vertical rod 12 is used to install the piercing blade 14, enabling the piercing blade 14 to accurately reach the bottom of the ton bag for bag breaking. The top of each of the multiple knife holders 11 is fixedly connected to a side knife 13. The blade 13 cuts into the side wall of the ton bag during the pressing process, initially breaking open the bag body and assisting in the completion of the bag breaking work. The top of the vertical rod 12 is fixedly connected to the scissor 14. The scissor 14, with its sharp edge and prismatic structure, can quickly and fully cut open the bottom of the ton bag to achieve efficient bag breaking. The outer walls of multiple blade holders 11 are fixedly connected to two reinforcing plates 15. The reinforcing plates 15 enhance the structural strength of the blade holders 11 and ensure that the blade holders 11 will not deform when subjected to the pressure during the bag breaking process, ensuring the stable operation of the bag breaking cutter. The inside of the feed hopper 5 is equipped with a filter mechanism 2, which is used to filter the fragments that fall off the bag after being cut by the blade during the bag opening process.

[0033] Specifically, the crane feeds the ton bag into the feed box 4 from the right side. The ton bag contacts the perforated plate 8 and applies pressure, causing the rotating plate 7 to rotate around the inner wall of the feed box 4. The rotating plate 7 rotates until it disengages from the limiting support plate 10, blocking the feed inlet of the feed box 4. Together with the side baffle 6, it forms a closed space. At this time, the perforation hole 9 on the perforated plate 8 aligns with the feed hopper 5, forming a material falling channel. The ton bag continues to press down, and its bottom first approaches the knife holder 11 in the upper middle part of the inner wall of the feed hopper 5. The top 14 of the blade pierces the bottom of the ton bag, and then the side blade 13 cuts into the side wall of the ton bag to break it open. The reinforcing plate 15 on the outer wall of the blade holder 11 enhances its structural strength and ensures stable operation of the blade. After the ton bag is cut open, the material falls into the feed hopper 5 through the hole 9 of the perforated plate 8 and enters the subsequent processing stage. The crane lifts the empty ton bag back up, and the rotating plate 7 rotates in the opposite direction under its own weight and reconnects with the limiting support plate 10. The device returns to its initial state and completes one opening process.

[0034] See attached document Figure 2 Appendix Figure 4 and attached Figure 5 The filtration mechanism 2 includes a filter disc 201. The outer wall of the filter disc 201 is slidably connected to the inner wall of the feed hopper 5. This slidable connection allows for the installation and removal of the filter disc 201 within the feed hopper 5, facilitating maintenance and cleaning. Sliding strips 202 are fixedly connected to the left and right sides of the outer wall of the filter disc 201, cooperating with sliding grooves 203 on the left and right sides of the inner wall of the feed hopper 5 to guide the sliding of the filter disc 201, ensuring stable sliding without deviation. Sliding grooves 203 are also provided on the left and right sides of the inner wall of the feed hopper 5, forming a slide rail structure with the sliding strips 202 of the filter disc 201, ensuring that the filter disc 201 slides in a fixed direction within the feed hopper 5. A locking block 204 is fixedly connected to the front side of the outer wall of the filter disc 201 for... The groove 205 on the front side of the outer wall of the feed hopper 5 cooperates with the locking block 204 to initially position the filter disc 201 in the working position. The groove 205 on the front side of the outer wall of the feed hopper 5 cooperates with the locking block 204 to limit the position of the filter disc 201 and prevent it from moving back and forth during the filtration process. The locking block 204 is fixedly connected to the front side of the outer wall with a pull ring 206, which allows the operator to pull the pull ring 206 to disengage the locking block 204 from the groove 205 and disassemble the filter disc 201. Two locking plates 207 are rotatably connected to the outer wall of the feed hopper 5. By rotating and fastening them to the locking block 204, the filter disc 201 is further locked to ensure that the filter disc 201 will not loosen due to impact during the material filtration process.

[0035] Specifically, during the installation of the filter mechanism 2, the outer wall slide strip 202 of the filter disc 201 is embedded into the inner wall slide groove 203 of the hopper 5. After sliding to the appropriate position, the locking block 204 is engaged in the slot 205. Then, the locking plate 207 is rotated to engage the locking block 204 to complete the fixation. After the ton bag is opened, the material falls into the feed hopper 5 through the leakage hole 9 of the leakage plate 8. The filter screen on the surface of the filter disc 201 intercepts the fragments of the ton bag, thus achieving material filtration. When the filter disc 201 accumulates impurities and needs to be cleaned, first unlock the locking plate 207, pull the pull ring 206 to disengage the locking block 204 from the slot 205, and use the slide strip 202 and the slide groove 203 to pull out the filter disc 201 for cleaning. After cleaning, reinstall and use it according to the original steps.

[0036] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 A reinforcing frame 16 is fixedly connected to the bottom of the limiting plate 10. This frame, connected to the feed box 4, enhances the structural strength of the limiting plate 10, ensuring its stability when supporting the rotating plate 7. The reinforcing frame 16, connected to the feed box 4, forms a rigid support structure, effectively dispersing the pressure generated by the rotating plate 7 during operation and preventing deformation of the limiting plate 10. Multiple weight-reducing holes 17 are provided on the outer walls of both side baffles 6, reducing overall weight while maintaining the structural strength of the side baffles 6, thus reducing material consumption and device load. A support platform 18 is fixedly connected to the top of the base plate 1, providing a stable mounting base for the servo motor 19 and reducing vibration transmission during motor operation. The servo motor 19 is fixedly connected to the top of the support platform 18, serving as a power source to drive the transmission shaft 22 to rotate, providing power for material conveying. Multiple cylinder frames 20 are fixedly connected to the top of the base plate 1, providing support and positioning for the conveying cylinder 21 through cooperation with its outer wall, ensuring a stable material conveying path. The bottom of the feed hopper 5 is connected to a transmission cylinder 21, the outer diameter of which is the same as the inner diameter of the cylinder frame 20, so as to achieve precise installation of the transmission cylinder 21 and ensure smooth transition of material from the feed hopper 5 to the transmission cylinder 21. The outer diameter of the transmission cylinder 21 is the same as the inner diameter of the cylinder frame 20, so as to ensure that the transmission cylinder 21 fits tightly with the cylinder frame 20 after installation and avoids shaking during material conveying. The output end of the servo motor 19 is fixedly connected to the drive shaft 22, which transmits the power of the motor to the screw belt 23, drives the screw belt 23 to rotate to realize the spiral conveying of material. The outer wall of the drive shaft 22 is fixedly connected to the screw belt 23, which pushes the material to move in the transmission cylinder 21 by rotation, so as to realize the directional conveying of material. The top of the bottom plate 1 is fixedly connected to the collection bin 24, which is used to store the material output from the transmission cylinder 21 and complete the centralized collection of material. The top of the collection bin 24 is fixedly connected to the bin cover 25 to prevent the material in the collection bin 24 from being contaminated by the outside and to reduce dust escaping.

[0037] Specifically, the limiting plate 10, together with the reinforcing frame 16, is connected to the feed box 4 to enhance structural stability and ensure reliable support for the rotating plate 7 during operation. The weight-reducing holes 17 of the side baffle 6 reduce the weight and cost of the device while maintaining strength. In the power system, the support platform 18 provides stable support for the servo motor 19, reducing vibration interference and ensuring efficient power transmission between the drive shaft 22 and the screw belt 23 to achieve spiral material conveying. The transmission components rely on the precise cooperation between the cylinder frame 20 and the transmission cylinder 21 to ensure a stable material conveying path and smooth transition. The collection bin 24 and the bin cover 25 are combined to achieve centralized material storage, effectively preventing external pollution and dust from spreading.

[0038] Working principle: When the crane sends the ton bag into the feed box 4 from the right side, the ton bag first contacts the sluice plate 8. As the ton bag moves downward, the sluice plate 8 is subjected to pressure, which drives the rotating plate 7, which is fixedly connected to it, to rotate around the rotation axis of the inner wall of the feed box 4. During the rotation of the rotating plate 7, it gradually blocks the feed inlet of the feed box 4, so that the feed box 4, the rotating plate 7, the sluice plate 8 and the side baffle 6 together form a relatively closed space, effectively preventing dust from spilling out during the opening process. At this time, the multiple holes 9 on the sluice plate 8 provide a channel for the material to fall. As the ton bag continues to be pressed down, its bottom gradually approaches the multiple knife holders 11 fixed in the upper middle part of the inner wall of the feed hopper 5. As the ton bag continues to descend, the spiking blades 14 at the top of the vertical rod 12 pierce into the bottom of the ton bag. The sharp edge of the spiking blades 14, in conjunction with its... The prismatic structure allows for quick and thorough cutting of the bottom of the ton bag. Then, the side blade 13 fixed on the blade holder 11 contacts the ton bag. Under the weight of the ton bag, the side blade 13 cuts into the ton bag, initially breaking the bag body. The two reinforcing plates 15 on the outer wall of the blade holder 11 enhance the structural strength of the blade holder 11, ensuring that the blade holder 11 stably supports the blade during the bag breaking process and avoiding deformation due to stress affecting the bag breaking effect. After the ton bag is cut open, the internal material falls into the feed hopper 5 through the leakage hole 9 on the perforated plate 8 under the action of gravity, and then enters the subsequent conveying or processing stage. The ton bag is then lifted back by the crane. As the ton bag detaches from the perforated plate 8, the rotating plate 7 rotates in the opposite direction around the rotating axis under its own gravity, reconnects with the limiting support plate 10, returns to the initial state, and waits for the next feeding and opening operation.

[0039] Furthermore, during the installation of the filter mechanism 2, the sliding strips 202 on the left and right sides of the outer wall of the filter disc 201 are correspondingly embedded in the sliding grooves 203 opened on the left and right sides of the inner wall of the hopper 5. This sliding rail design not only provides guidance for the sliding of the filter disc 201, but also enhances the stability of the filter disc 201 during operation. When the filter disc 201 slides to the appropriate position, the locking block 204 on the front side of the outer wall of the filter disc 201 will lock into the locking groove 205 opened on the front side of the outer wall of the hopper 5, initially fixing the position of the filter disc 201. Subsequently, the two locking plates 207 on the outer wall of the hopper 5 are rotated to engage with the locking block 204, further securing the filter disc 201 firmly and ensuring that the filter disc 201 will not move due to material impact during the filtration process. When the ton bag is opened, the material falls into the hopper 5 through the leakage hole 9 on the leakage plate 8. During the falling process, the filter disc 201... 01. The material is filtered. The filter disc 201 is equipped with a filter screen that can intercept fragments from the ton bag, allowing only materials of qualified particle size to pass through, preventing these impurities from entering the subsequent conveying or processing stages, and ensuring material quality. As filtration continues, a lot of impurities will accumulate on the filter disc 201. At this time, it needs to be cleaned. The operator first unlocks the locking plate 207, and then pulls the pull ring 206 fixedly connected to the front side of the outer wall of the locking block 204 to disengage the locking block 204 from the locking groove 205. Then, by using the sliding cooperation between the slide bar 202 and the slide groove 203, the filter disc 201 is pulled upward along the inner wall of the feed hopper 5. After being pulled out, the impurities on the filter disc 201 can be cleaned in a concentrated manner. After cleaning, the filter disc 201 is reinstalled into the feed hopper 5 according to the installation steps to continue the next filtration operation.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ton bag unpacking device comprising a base plate (1), characterized in that: A bracket (3) is fixedly connected to the top of the base plate (1). A feeding box (4) is fixedly connected to the inner wall of the bracket (3). A feeding hopper (5) is connected to the bottom of the feeding box (4). Two side baffles (6) are fixedly connected to the right side of the outer wall of the feeding box (4). A rotating plate (7) is rotatably connected to the inner wall of the feeding box (4). A drain plate (8) is fixedly connected to the bottom of the rotating plate (7). Multiple drain holes (9) are opened on the outer wall of the drain plate (8). The bottoms of the two side baffles (6) are fixedly connected to... The hopper (5) has a single limiting plate (10). Multiple knife holders (11) are fixedly connected to the upper part of the inner wall of the hopper (5). The top of each of the multiple knife holders (11) is fixedly connected to the same vertical rod (12). The top of each of the multiple knife holders (11) is fixedly connected to a side knife (13). The top of the vertical rod (12) is fixedly connected to a piercing knife (14). The hopper (5) is equipped with a filter mechanism (2). The filter mechanism (2) is used to filter the fragments that fall off the bag after being cut by the blade during the opening process.

2. The ton bag opener of claim 1, wherein: The filtration mechanism (2) includes a filter disc (201), the outer wall of which is slidably connected to the inner wall of the feed hopper (5). Sliding strips (202) are fixedly connected to the left and right sides of the outer wall of the filter disc (201). Sliding grooves (203) are provided on the left and right sides of the inner wall of the feed hopper (5). A locking block (204) is fixedly connected to the front side of the outer wall of the filter disc (201). A locking groove (205) is provided on the front side of the outer wall of the feed hopper (5). A pull ring (206) is fixedly connected to the front side of the outer wall of the locking block (204). Two locking plates (207) are rotatably connected to the outer wall of the feed hopper (5).

3. The ton bag opener of claim 1, wherein: Two reinforcing plates (15) are fixedly connected to the outer walls of the multiple tool holders (11), and a reinforcing frame (16) is fixedly connected to the bottom of the limiting support plate (10).

4. The ton bag opener of claim 1, wherein: The outer walls of the two side baffles (6) are provided with multiple weight-reducing holes (17), and the top of the bottom plate (1) is fixedly connected with a support platform (18).

5. The ton bag opener of claim 4 wherein: A servo motor (19) is fixedly connected to the top of the support platform (18), and multiple cylindrical frames (20) are fixedly connected to the top of the base plate (1).

6. The ton bag opener of claim 5 wherein: The bottom of the feed hopper (5) is connected to a transmission cylinder (21), and the outer diameter of the transmission cylinder (21) is the same as the inner diameter of the cylinder frame (20).

7. The ton bag opener of claim 5 wherein: The output end of the servo motor (19) is fixedly connected to a drive shaft (22), and a screw belt (23) is fixedly connected to the outer wall of the drive shaft (22).

8. The ton bag opener of claim 1, wherein: A collection chamber (24) is fixedly connected to the top of the base plate (1), and a chamber cover (25) is fixedly connected to the top of the collection chamber (24).

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