Device for detecting emulsification stability of pea protein powder

Abstract

The invention discloses a device for detecting the emulsification stability of pea protein powder, and belongs to the technical field of pea protein powder detection devices, the device comprises a cylinder body, a water supply pipe is inserted on the cylinder body, and an indirect feeding assembly is arranged on the cylinder body. By arranging a blocking plate, in the process that a rotating rod drives a first push rod to rotate, the first push rod drives the blocking plate to do up-and-down reciprocating motion through an inclined block, and in the process that the blocking plate moves upwards, a discharging groove is driven to make contact with raw materials, and at the moment, the raw materials above a baffle can enter a solution below a barrel through the discharging groove; when the first push rod is separated from the inclined block, the elastic cushion extends and drives the plugging plate to reset downwards, and the discharging groove is driven to be separated from the raw materials after the plugging plate finishes resetting, so that the raw materials can be indirectly added into a solution in the barrel, the raw materials and the solution are quickly and uniformly mixed, and the mixing uniformity of the raw materials is further improved; and the accuracy of detection data is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pea protein powder detection devices, and more specifically, to a device for detecting the emulsification stability of pea protein powder. Background Art

[0002] Pea protein powder is high-quality protein extracted from peas by an advanced process using low-temperature and low-pressure technology. Pea protein contains eight essential amino acids for the human body and belongs to a complete protein. Emulsification stability refers to the property that an emulsion maintains an obvious stable state and does not produce the unstable phenomenon of two-phase stratification. Emulsification is a liquid-liquid interface phenomenon.

[0003] Many foods (such as plant-based beverages, salad dressings, meat product substitutes, etc.) require protein powder as an emulsifier to help oil and water mix and maintain a uniform state. If the emulsification stability is poor, problems such as stratification, precipitation, or loose texture may occur in the product, and the functions of pea protein powders produced from different raw materials or processes may vary. In the prior art, when detecting the emulsification stability of pea protein powder, it is mostly necessary to manually prepare the protein powder-water-oil emulsion. The manual operation workload is large, and the manual operation error is relatively large, which cannot guarantee the stability and accuracy of the test detection data.

[0004] In response to the above problems, some solutions have also been given in the prior art. For example, the Chinese utility model patent with the authorization announcement number CN211904850U discloses a device for detecting the emulsification stability of pea protein powder. This device automatically prepares the pea protein powder-water-oil emulsion for detecting the emulsification stability of pea protein powder, reducing the burden of manual operation, and can also ensure the uniform mixing of pea protein powder, water, and oil, preventing powder caking and enabling the uniform mixing of the material and oil. Although the prior art can make the material and oil mix uniformly, thereby improving the accuracy of the detection data, in the prior art, a large amount of protein powder is directly mixed with water, resulting in the easy formation of a large number of powder bubbles wrapped with protein powder between the protein powder and water, which easily affects the mixing effect between the materials and causes errors in the detection data. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a device for detecting the emulsification stability of pea protein powder, which can achieve the purpose of improving the accuracy of detection data.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A device for detecting the emulsification stability of pea protein powder, including a cylinder body, a water supply pipe inserted on the cylinder body, and an indirect feeding assembly provided on the cylinder body; The indirect feeding assembly includes a baffle fixedly installed inside the cylinder body, and the top wall of the baffle is an inclined surface. A motor is fixedly installed on the cylinder body, a rotating rod is fixedly installed on the motor, stirring rods are uniformly fixedly installed on the rotating rod, an annular groove is formed on the baffle, a plugging plate for plugging the annular groove is slidably installed on the rotating rod, and an elastic pad is jointly installed between the plugging plate and the baffle. A discharge groove is formed on the plugging plate, a first inclined block is fixedly installed on the bottom wall of the plugging plate, and a first push rod cooperating with the first inclined block is fixedly installed on the rotating rod. A refueling assembly is provided on the rotating rod.

[0008] Further, elastic rods are uniformly fixedly installed on the baffle and the inner wall of the cylinder body, and bumps are uniformly fixedly installed on the plugging plate.

[0009] Further, a refueling rod is fixedly installed on the rotating rod, a refueling groove is formed on the refueling rod, a refueling pipe is rotatably installed on the rotating rod, and the refueling pipe is communicated with the refueling groove. Refueling holes are uniformly formed on the bottom wall of the refueling groove.

[0010] Further, an installation ring is fixedly installed inside the cylinder body, a mixing net is vertically slidably installed inside the cylinder body, an elastic airbag is jointly installed between the mixing net and the installation ring, and a second inclined block cooperating with the stirring rod is fixedly installed on the top wall of the mixing net.

[0011] Further, a liquid inlet valve with an input end communicated with the cylinder body is inserted into the elastic airbag, a groove is formed on the installation ring, spraying holes are uniformly formed on the groove, and a liquid discharge valve with an output end communicated with the groove is inserted into the elastic airbag.

[0012] Further, a sliding groove is formed on the cylinder body, a buoyancy plate is slidably installed inside the sliding groove, and a communicating pipe communicated with the output end of the liquid discharge valve is fixedly installed on the buoyancy plate.

[0013] Further, two second inclined blocks are symmetrically arranged around the rotating rod.

[0014] Further, the top wall of the plugging plate is an inclined surface.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In the present invention, by providing a sealing plate, during the rotation of the rotating rod driving the first push rod, the first push rod drives the sealing plate to reciprocate up and down through the first inclined block. And during the upward movement of the sealing plate, it drives the discharge slot to contact the raw material. At this time, the raw material above the baffle can enter the solution below the cylinder through the discharge slot. When the first push rod disengages from the first inclined block, the elastic pad expands and drives the sealing plate to reset downward. After the reset of the sealing plate is completed, it drives the discharge slot to disengage from the raw material, enabling the raw material to be intermittently added to the solution in the cylinder, making the raw material and the solution mix quickly and evenly, thereby improving the uniformity of the raw material mixing and playing a role in improving the accuracy of the detection data. (2) In the present invention, by providing an elastic rod, during the up and down movement of the sealing plate, it drives the convex block to move up and down. And during the up and down movement of the convex block, it will repeatedly impact the elastic rod and cause the elastic rod to swing back and forth. Then, during the back and forth swing of the elastic rod, it can stir the raw material on the top wall of the baffle, ensuring the normal movement of the raw material into the groove. And during the impact of the convex block on the elastic rod, the elastic rod transmits the vibration to the baffle, ensuring that the raw material on the baffle can completely enter the cylinder through the groove, thereby improving the accuracy of the raw material ratio and further improving the accuracy of the detection data. (3) In the present invention, by providing a mixing mesh, it can block the raw material that is not fully mixed in the solution, keeping the raw material that is not fully mixed in the middle of the mixed solution, thereby improving the mixing efficiency and avoiding the situation where the raw material that is not fully mixed sinks to the bottom, resulting in too high a concentration of the solution below and affecting the mixing effect of the solution. And during the rotation of the stirring rod, it can drive the mixing mesh to vibrate up and down through the second inclined block. Then, during the up and down vibration of the mixing mesh, it can drive the raw material that is not fully mixed on the top wall of the mixing mesh to swing, ensuring the uniform mixing of the solution and further improving the accuracy of the detection data. (4) In the present invention, by opening a groove, during the vibration of the elastic airbag, it can drive the solution to spray through the spray holes on the groove towards the mixed solution, thereby improving the mixing effect of the solution. At the same time, it prolongs the residence time of the oil in the solution below the mixing mesh, improving the uniformity of the solution mixing. And under the action of the buoyancy plate, the communicating pipe can always be in contact with the surface solution. Since the oil will quickly float up after entering the solution, by setting the buoyancy plate, it can suck the surface solution, and then during the compression of the elastic airbag, the surface solution will be sprayed through the spray holes towards the lower part of the solution, ensuring the full and uniform mixing of the solution and avoiding uneven mixing of the solution, which affects the accuracy of the detection data and further improves the accuracy of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the cross-sectional view of the present invention; Figure 3For Figure 2 Enlarged view of part A in Figure 4 For Figure 2 Enlarged view of part B in Figure 5 Combined view of the plugging plate and the bump of the present invention; Figure 6 Top view cross-sectional view of the mounting ring of the present invention; Figure 7 Cross-sectional view of the fuel filling rod and the rotating rod of the present invention; Figure 8 Bottom view of the present invention.

[0017] Explanation of the reference numerals in the figure: 1, cylinder body; 2, water supply pipe; 3, indirect feeding assembly; 301, baffle; 302, motor; 303, rotating rod; 304, stirring rod; 305, plugging plate; 306, elastic pad; 307, discharge chute; 308, first inclined block; 309, first push rod; 310, elastic rod; 311, bump; 4, fuel filling assembly; 401, fuel filling rod; 402, fuel filling groove; 403, fuel filling pipe; 404, fuel filling hole; 501, mounting ring; 502, mixing net; 503, elastic airbag; 504, second inclined block; 601, liquid inlet valve; 602, groove; 603, injection hole; 604, liquid discharge valve; 605, buoyancy plate; 606, sliding groove; 607, connecting pipe. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 8 , a device for detecting the emulsification stability of pea protein powder, including a cylinder body 1, a water supply pipe 2 inserted on the cylinder body 1, and an indirect feeding assembly 3 provided on the cylinder body 1; The indirect feeding assembly 3 includes a baffle 301 fixedly installed in the cylinder body 1, and the top wall of the baffle 301 is an inclined surface. A motor 302 is fixedly installed on the cylinder body 1, a rotating rod 303 is fixedly installed on the motor 302, stirring rods 304 are uniformly fixedly installed on the rotating rod 303. An annular groove is formed in the baffle 301, a sealing plate 305 for blocking the annular groove is slidably installed on the rotating rod 303, and an elastic pad 306 is jointly installed between the sealing plate 305 and the baffle 301. A discharge groove 307 is formed in the sealing plate 305, a first inclined block 308 is fixedly installed on the bottom wall of the sealing plate 305, and a first push rod 309 matched with the first inclined block 308 is fixedly installed on the rotating rod 303. A fuel adding assembly 4 is arranged on the rotating rod 303.

[0020] Elastic rods 310 are uniformly fixedly installed on the baffle 301 and the inner wall of the cylinder body 1, and convex blocks 311 are uniformly fixedly installed on the sealing plate 305.

[0021] A fuel adding rod 401 is fixedly installed on the rotating rod 303, a fuel adding groove 402 is formed in the fuel adding rod 401, a fuel adding pipe 403 is rotatably installed on the rotating rod 303, and the fuel adding pipe 403 is communicated with the fuel adding groove 402. Fuel adding holes 404 are uniformly formed in the bottom wall of the fuel adding groove 402.

[0022] During use, the user can first add a certain amount of aqueous solution into the cylinder body 1 through the water supply pipe 2, then start the motor 302 to drive the rotating rod 303 to rotate. During the rotation of the rotating rod 303, the first push rod 309 is driven to rotate. Then, during the rotation of the first push rod 309, it gradually contacts the first inclined block 308 and drives the first inclined block 308 to move upward. During the upward movement of the first inclined block 308, the sealing plate 305 is driven to move upward and compress the elastic pad 306. Then, during the upward movement of the sealing plate 305, the discharge groove 307 is driven to contact the raw material. At this time, the raw material above the baffle 301 can enter the solution below the cylinder body 1 through the discharge groove 307. When the first push rod 309 is separated from the first inclined block 308, the elastic pad 306 extends and drives the sealing plate 305 to reset downward. After the reset of the sealing plate 305 is completed, the discharge groove 307 is driven to be separated from the raw material. At the same time, the rotating rod 303 drives the stirring rod 304 to stir the mixed solution in the cylinder body 1. That is, by setting the sealing plate 305, the raw material can be indirectly added into the solution in the cylinder body 1, so that the raw material and the solution can be quickly and evenly mixed, thereby improving the uniformity of the raw material mixing and playing a role in improving the accuracy of the detection data.

[0023] During the up-and-down movement of the plugging plate 305, the bump 311 is driven to move up and down. During the up-and-down movement of the bump 311, it will repeatedly impact the elastic rod 310, causing the elastic rod 310 to swing back and forth. Then, during the back-and-forth swing of the elastic rod 310, the raw materials on the top wall of the baffle 301 can be agitated, ensuring the normal movement of the raw materials into the groove 602. And during the impact of the bump 311 on the elastic rod 310, the elastic rod 310 transmits the vibration to the baffle 301, ensuring that the raw materials on the baffle 301 can completely enter the cylinder 1 through the groove 602, thereby improving the accuracy of the raw material ratio and further enhancing the accuracy of the detection data.

[0024] During the rotation of the rotating rod 303, the oil filling rod 401 is driven to rotate. At the same time, the user can add oil into the oil filling groove 402 through the oil filling pipe 403. Then, the oil evenly flows into the mixed solution through the oil filling holes 404 on the oil filling groove 402. And because the density of the oil is smaller, it will float upward in the solution. By evenly adding the oil below the mixed solution, the oil can be fully contacted with the mixed solution, further improving the uniformity of the mixing among the oil, raw materials, and water, and further enhancing the accuracy of the detection data.

[0025] An installation ring 501 is fixedly installed inside the cylinder 1, and a mixing net 502 is vertically slidably installed inside the cylinder 1. An elastic airbag 503 is jointly installed between the mixing net 502 and the installation ring 501. A second inclined block 504 that cooperates with the stirring rod 304 is fixedly installed on the top wall of the mixing net 502.

[0026] A liquid inlet valve 601 with an input end communicating with the cylinder 1 is inserted into the elastic airbag 503. A groove 602 is formed on the installation ring 501. Injection holes 603 are evenly formed on the groove 602, and a liquid discharge valve 604 with an output end communicating with the groove 602 is inserted into the elastic airbag 503.

[0027] A sliding groove 606 is formed on the cylinder 1. A buoyancy plate 605 is slidably installed inside the sliding groove 606. A communicating pipe 607 that is fixedly installed on the buoyancy plate 605 and communicates with the output end of the liquid discharge valve 604.

[0028] By adopting the above technical solution, during the process of the rotating rod 303 driving the stirring rod 304 to stir the mixed solution in the cylinder 1, the mixing net 502 can block the raw materials that are not fully mixed in the solution, so that the raw materials that are not fully mixed are kept in the middle of the mixed solution, thereby improving the mixing efficiency, and avoiding the raw materials that are not fully mixed from sinking to the bottom, resulting in too high concentration of the solution below and affecting the mixing effect of the solution. At the same time, during the rotation of the stirring rod 304, it gradually contacts the inclined surface of the second inclined block 504 and drives the second inclined block 504 to move downward. During the downward movement of the second inclined block 504, it drives the mixing net 502 to move downward and squeezes the elastic airbag 503. Then, when the second inclined block 504 is separated from the stirring rod 304, the elastic airbag 503 expands and drives the mixing net 502 to reset upward. That is, during the process of the stirring rod 304 stirring and mixing the mixed solution, it can also drive the mixing net 502 to swing up and down. Then, during the up-and-down swing of the mixing net 502, it can drive the raw materials that are not fully mixed on the mixing net 502 to swing, thereby ensuring the uniform mixing of the solution and further improving the accuracy of the detection data.

[0029] During the expansion process of the elastic airbag 503, the solution is sucked in through the liquid inlet valve 601. Then, during the compression process of the elastic airbag 503, the solution in the elastic airbag 503 flows into the groove 602 through the drain valve 604 and is sprayed onto the mixed solution through the spray holes 603 on the groove 602. Thus, while improving the mixing effect of the solution, it prolongs the residence time of the oil in the solution below the mixing net 502, further improving the uniformity of the solution mixing, and thus further improving the accuracy of the detection data.

[0030] During the expansion process of the elastic airbag 503, the elastic airbag 503 sucks the solution through the liquid inlet valve 601 and the connecting pipe 607, and under the action of the buoyancy plate 605, the connecting pipe 607 can always be in contact with the surface solution. Since the oil will quickly float up after entering the solution, by setting the buoyancy plate 605, the surface solution can be sucked. Then, during the compression process of the elastic airbag 503, the surface solution will be sprayed downward through the spray holes 603, thereby ensuring the full and uniform mixing of the solution, avoiding uneven mixing of the solution and affecting the accuracy of the detection data, and further improving the accuracy of the detection data.

[0031] Two second inclined blocks 504 are symmetrically arranged around the rotating rod 303.

[0032] By adopting the above technical solution, during the process of the second inclined block 504 driving the mixing net 502 to move, through the two symmetrically arranged second inclined blocks 504, the mixing net 502 can be evenly stressed, avoiding being stuck due to uneven stress, and playing a role in ensuring the normal movement of the mixing net 502.

[0033] The top wall of the plugging plate 305 is an inclined surface.

[0034] By adopting the above technical solution, by making the top wall of the plugging plate 305 an inclined surface, it is possible to avoid the remaining raw materials on the top wall of the plugging plate 305, resulting in a change in the ratio of the mixed solution and affecting the accuracy of the detection data.

[0035] Working principle: The user can first add a certain amount of aqueous solution into the cylinder body 1 through the water supply pipe 2, and then start the motor 302 to drive the rotating rod 303 to rotate. During the rotation of the rotating rod 303, the first push rod 309 is driven to rotate. Then, during the rotation of the first push rod 309, it gradually contacts the first inclined block 308 and drives the first inclined block 308 to move upward. And during the upward movement of the first inclined block 308, the sealing plate 305 is driven to move upward and squeeze the elastic pad 306. Then, during the upward movement of the sealing plate 305, the discharge chute 307 is driven to contact the raw material. At this time, the raw material above the baffle 301 can enter the solution below the cylinder body 1 through the discharge chute 307. When the first push rod 309 is disengaged from the first inclined block 308, the elastic pad 306 expands and drives the sealing plate 305 to reset downward. After the reset of the sealing plate 305 is completed, the discharge chute 307 is driven to disengage from the raw material. At the same time, the rotating rod 303 drives the stirring rod 304 to stir the mixed solution in the cylinder body 1; during the up and down movement of the sealing plate 305, the convex block 311 is driven to move up and down. And during the up and down movement of the convex block 311, it will repeatedly impact the elastic rod 310 and make the elastic rod 310 swing back and forth. Then, during the back and forth swing of the elastic rod 310, the raw material on the top wall of the baffle 301 can be stirred, so as to ensure the normal movement of the raw material into the groove 602. And during the process of the convex block 311 impacting the elastic rod 310, the elastic rod 310 transmits the vibration to the baffle 301, so as to ensure that the raw material on the baffle 301 can completely enter the cylinder body 1 through the groove 602; during the rotation of the rotating rod 303, the oil filling rod 401 is driven to rotate. At the same time, the user can add oil into the oil filling groove 402 through the oil filling pipe 403. Then, the oil uniformly flows into the mixed solution through the oil filling holes 404 on the oil filling groove 402. And because the density of the oil is small, it will float upward in the solution. By uniformly adding the oil below the mixed solution, the oil can be fully contacted with the mixed solution; during the process of the rotating rod 303 driving the stirring rod 304 to stir the mixed solution in the cylinder body 1, by setting the mixing net 502, the raw materials that are not completely mixed in the solution can be blocked, so that the raw materials that are not completely mixed are kept in the middle of the mixed solution, thereby improving the mixing efficiency. During the rotation of the stirring rod 304, it gradually contacts the inclined surface of the second inclined block 504 and drives the second inclined block 504 to move downward. During the downward movement of the second inclined block 504, the mixing net 502 is driven to move downward and squeeze the elastic airbag 503. Then, when the second inclined block 504 is disengaged from the stirring rod 304, the elastic airbag 503 expands and drives the mixing net 502 to reset upward. That is, during the process of the stirring rod 304 stirring and mixing the mixed solution, the mixing net 502 can also be driven to swing up and down. Then, during the up and down swing of the mixing net 502, the raw materials that are not completely mixed on the mixing net 502 can be driven to swing;During the expansion of the elastic airbag 503, the suction solution is drawn through the liquid inlet valve 601. Then, during the compression of the elastic airbag 503, the solution inside the elastic airbag 503 flows through the liquid discharge valve 604 into the groove 602 and is sprayed onto the mixed solution through the spray holes 603 on the groove 602, thereby improving the solution mixing effect. At the same time, the residence time of the oil in the solution below the mixing mesh 502 is extended; during the expansion of the elastic airbag 503, the elastic airbag 503 draws the solution through the liquid inlet valve 601 and the connecting pipe 607, and under the action of the buoyancy plate 605, the connecting pipe 607 can always be in contact with the surface solution. Since the oil will quickly float up after entering the solution, by setting the buoyancy plate 605, the surface solution can be drawn, and then during the compression of the elastic airbag 503, the surface solution will be sprayed downward through the spray holes 603, thus ensuring the full and uniform mixing of the solution.

[0036] As mentioned above, it is only the preferred specific embodiment of the present invention; however, 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 of the present invention and its improved concept, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the emulsification stability of pea protein powder, comprising a barrel (1), a water supply pipe (2) inserted into the barrel (1), and an indirect material supply component (3) disposed on the barrel (1); Features: The indirect feeding assembly (3) comprises a baffle (301) fixedly mounted in a cylinder (1), wherein the top wall of the baffle (301) is an inclined surface, a motor (302) is fixedly mounted on the cylinder (1), a rotating rod (303) is fixedly mounted on the motor (302), a stirring rod (304) is evenly fixedly mounted on the rotating rod (303), an annular groove is formed on the baffle (301), and a sealing ring is slidably mounted on the rotating rod (303). A sealing plate (305) is provided with a sealing groove, and an elastic pad (306) is installed between the sealing plate (305) and the baffle plate (301); a discharge groove (307) is provided on the sealing plate (305); a first inclined block (308) is fixedly installed on the bottom wall of the sealing plate (305); a first push rod (309) cooperating with the first inclined block (308) is fixedly installed on the rotating rod (303); and a refueling assembly (4) is provided on the rotating rod (303).

2. The device for detecting the emulsification stability of pea protein powder according to claim 1, characterized in that: Elastic rods (310) are evenly fixedly mounted on the baffle plate (301) and the inner wall of the cylinder (1), and bumps (311) are evenly fixedly mounted on the blocking plate (305).

3. The device for detecting the emulsification stability of pea protein powder according to claim 2, characterized in that: A refueling rod (401) is fixedly mounted on the rotating rod (303), and a refueling groove (402) is provided on the refueling rod (401). A refueling pipe (403) is rotatably mounted on the rotating rod (303), and the refueling pipe (403) is connected to the refueling groove (402). Refueling holes (404) are evenly provided on the bottom wall of the refueling groove (402).

4. The device for detecting the emulsification stability of pea protein powder according to claim 3, characterized in that: A mounting ring (501) is fixedly mounted in the cylinder (1), and a mixing net (502) is vertically slidably mounted in the cylinder (1); an elastic air bag (503) is mounted between the mixing net (502) and the mounting ring (501); and a second inclined block (504) cooperating with a stirring rod (304) is fixedly mounted on the top wall of the mixing net (502).

5. The device for detecting the emulsification stability of pea protein powder according to claim 4, characterized in that: The elastic airbag (503) is provided with a liquid inlet valve (601) whose input end is connected to the cylinder (1), the mounting ring (501) is provided with a groove (602), the groove (602) is evenly provided with injection holes (603), and the elastic airbag (503) is provided with a liquid discharge valve (604) whose output end is connected to the groove (602).

6. The device for detecting the emulsification stability of pea protein powder according to claim 5, characterized in that: The cylinder (1) is provided with a slide groove (606), a buoyancy plate (605) is slidably mounted in the slide groove (606), and a connecting pipe (607) connected to the output end of the drain valve (604) is fixedly mounted on the buoyancy plate (605).

7. The device for detecting the emulsification stability of pea protein powder according to claim 4, characterized in that: Two of the second inclined blocks (504) are symmetrically arranged around the rotating rod (303).

8. The device for detecting the emulsification stability of pea protein powder according to claim 1, characterized in that: The top wall of the blocking plate (305) is an inclined surface.

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