Embossing rib and cotton gin middle box

Abstract

The utility model relates to the technical field of seed cotton processing machinery, and discloses an embossing rib and an embossing machine middle box, the embossing rib comprises a body and an insert, the body comprises a fixed section, a transition section and a main body section which are of an integrated structure, the transition section is arranged between the fixed section and the main body section, the fixed section is suitable for being connected with a rib row frame, and the insert is suitable for being connected with the rib row frame. The fixed section, the transition section and the main body section jointly form a continuous working surface which is used for separating cotton fibers and discharging cotton seeds, and a mounting part is arranged on the working surface, close to the transition section, of the main body section; the insert part is arranged in the mounting part, and when the insert part is mounted in the mounting part, the surface of the insert part is flush with the working surface of the main body section; according to the cotton ginning rib, the overall strength of the cotton ginning rib is improved, the service life of the cotton ginning rib is prolonged, and the situation that a gap between every two adjacent cotton ginning ribs is blocked by cotton fibers is avoided.

Description

Technical Field

[0001] This utility model relates to the field of cotton processing machinery technology, specifically to cotton ginning ribs and the middle box of a cotton gin. Background Technology

[0002] The cotton gin is the main processing equipment used for processing seed cotton. It mainly consists of a saw blade and ribs installed between the saw blades to separate cotton fibers. The saw blade is installed between the ribs. Under the high-speed rotation of the saw blade, the cotton fibers hooked by the saw blade pass through the gaps between adjacent ribs. At the same time, the cotton seeds are blocked by the ribs, and the cotton fibers are brushed off by a brush or blown off by airflow. The cotton seeds will also flow out along the surface of the ribs. The cotton gin requires multiple ribs, which are arranged in rib rows.

[0003] The ginning ribs are key components in the ginning process, affecting its smoothness and stability. In existing patented technologies, there are abrupt changes in cross-sectional shape between the fixed section and the main body of the ginning rib. These areas experience greater stress and localized increased stress, making the ginning ribs prone to breakage and impacting production. The point where cotton fibers separate from cotton seeds, where the saw blade hooks the cotton fibers through the gaps between the ginning ribs, is called the working point. Because the gaps between the ginning ribs and the saw blade are small, the cotton fibers rub against the working point of the ginning ribs as they pass through the gaps between adjacent ginning ribs. This causes wear at the working point, resulting in gaps in the ginning ribs and affecting the quality of the lint. Furthermore, cotton fibers can sometimes block the gaps between adjacent ginning ribs as they pass through. Utility Model Content

[0004] In view of this, the present invention provides a ginning rib and a ginning machine box to solve the problems of easy wear and breakage at the working point of the ginning rib, low overall strength, and cotton fiber blockage between adjacent ginning ribs.

[0005] In a first aspect, this utility model provides a embossed rib, comprising:

[0006] The body includes a fixed section, a transition section, and a main body section of an integral structure. The transition section is disposed between the fixed section and the main body section. The fixed section is adapted to be connected to the rib frame.

[0007] The fixed section, the transition section, and the main body section are formed together to form a continuous working surface, which is used to separate cotton fibers and discharge cotton seeds; the width of the transition section is smaller than the width of the fixed section and the main body section.

[0008] Beneficial effects: By setting a fixed section, transition section and main body section to form a continuous working surface, the overall strength of the ginning ribs is improved, avoiding stress concentration caused by discontinuous working surface and resulting in ginning rib breakage. In addition, since the width of the transition section is smaller than the width of the fixed section and the main body section, cotton fibers can pass smoothly through both sides of the transition section, which helps to avoid cotton fibers blocking the gap between two adjacent ginning ribs.

[0009] In one optional embodiment, the main body segment has a mounting portion on its working surface near the transition segment; it also includes an insert disposed within the mounting portion, wherein when the insert is installed within the mounting portion, the surface of the insert is flush with the working surface of the main body segment.

[0010] Beneficial effects: The insert made of wear-resistant material installed in the mounting section enables the cotton fibers of the embossed ribs to be separated, which helps to improve the service life of the embossed ribs.

[0011] In one alternative embodiment, the main body segment has a connecting end and a free end, the connecting end being connected to the transition segment, and the width of the main body segment gradually increases in the extension direction from the connecting end to the mounting portion; and the width of the main body segment gradually decreases in the extension direction from the mounting portion to the free end.

[0012] Beneficial effects: By setting the main body segment with a connecting end and a free end, which are respectively located at both ends of the main body segment, the connecting end is connected to the transition segment. It should be noted that the connecting end itself does not exist; it is specifically the cross-sectional end face between the transition segment and the main body segment. In the extension direction of the main body segment from the connecting end to the mounting part, the width of the main body segment gradually increases, while in the extension direction from the mounting part to the free end, the width of the main body segment gradually decreases. This minimizes the gap between two adjacent ginning ribs at the mounting part, allowing for the separation of cotton fibers and cotton seeds through a small gap. The gap between two adjacent ginning ribs at the mounting part and the free end gradually increases, further preventing cotton fiber blockage. It should be noted that the gap between two adjacent ginning ribs cannot be greater than the waist diameter of the cotton seed to ensure that the cotton seed does not fall between the two adjacent ginning ribs.

[0013] In one optional embodiment, the mounting part is a mounting groove, the bottom surface of the mounting groove is a plane, and the insert fits into the mounting groove.

[0014] Beneficial effects: By setting the mounting part as a mounting groove, and the bottom surface of the mounting groove being a plane, it is easier to process the mounting groove. In addition, the insert and the mounting groove are in a conformal fit, and since the bottom surface of the mounting groove is a plane, the processing of the insert is also more convenient.

[0015] In an alternative embodiment, a connector is further included, disposed between the insert and the body segment, to connect the insert and the body segment.

[0016] Beneficial effects: By setting a connector between the insert and the main body segment, the connector in this embodiment can be a screw, glue, etc., which will not be described in detail here. When the insert is installed in the mounting groove, the connector can connect the insert and the main body segment together.

[0017] In one optional embodiment, the fixed section has at least two connecting portions, which are spaced apart, and both connecting portions are adapted to be connected to the rib frame via an adapter to connect the body and the rib frame.

[0018] Beneficial effects: By using two connecting parts on the fixed section, which are connecting holes in this embodiment, the two connecting parts are spaced apart, and both connecting parts can be connected to the rib frame through an adapter. In this embodiment, the adapter is a screw to connect the body and the rib frame together. The two connecting parts are set to fix the embossed rib as a whole and prevent rotation.

[0019] In one alternative implementation, both the transition section and the main body section are inwardly inclined and contracted structures in the vertically downward direction.

[0020] Beneficial effect: By setting the transition section and main body section to an inwardly inclined and contracted structure in the vertical direction, the gap between two adjacent ginning ribs gradually increases in the vertical direction, thereby further preventing cotton fibers from blocking the gap.

[0021] Secondly, this utility model also provides a middle box for a cotton ginning machine, comprising:

[0022] The box has a receiving cavity with an opening on one side, the receiving cavity being suitable for holding seed cotton;

[0023] Rib frame, wherein the rib frame is disposed within the receiving cavity and connected to the side wall of the box body;

[0024] A plurality of embossed ribs, any one of which is the embossed rib described above, and the fixed section of any one of the embossed ribs is adapted to extend into the receiving cavity through the opening and connect with the rib frame, and all the embossed ribs are spaced apart.

[0025] Beneficial effects: By setting the ginning ribs to the aforementioned ginning ribs, the service life of the ginning ribs is increased, thereby reducing the number of ginning rib replacements. This extends the working cycle of the ginning machine's inner box and also prevents cotton fiber blockage.

[0026] In an optional embodiment, the device further includes a saw blade roller, which is rotatably disposed on one side of the housing, and a portion of the saw blade roller is disposed within the receiving cavity through the opening. The saw blade roller is used to hook cotton fibers. The saw blade roller is provided with a plurality of saw blades, all of which are spaced apart, and any one of the saw blades is disposed between two adjacent calendering ribs. The hooking end of any one of the saw blades is disposed within the receiving cavity through the opening.

[0027] Beneficial effects: By rotating the saw blade roller located on one side of the housing, part of the saw blade roller is positioned inside the receiving cavity through an opening, allowing the saw blade roller to hook the seed cotton inside the receiving cavity and separate the cotton fibers from the cotton seeds; by using several saw blades set on the saw blade roller, all the saw blades are spaced apart, and each saw blade is positioned between two adjacent ginning ribs. At the same time, the hooking end of each saw blade is positioned inside the receiving cavity through an opening, so that when the saw blade hooks the cotton fibers, the two adjacent ginning ribs can guide the cotton seeds, thus separating the cotton fibers from the cotton seeds.

[0028] In an optional embodiment, a blocking structure is further included, the blocking structure comprising a first blocking member and a second blocking member, both the first blocking member and the second blocking member being disposed within the receiving cavity and both being connected to the side wall of the box body, the first blocking member and the second blocking member together forming a rotating cavity, and the seed cotton being adapted to rotate relative to the saw blade roller within the rotating cavity under the drive of the saw blade roller.

[0029] Beneficial effects: By setting a blocking structure in the receiving cavity, the blocking structure specifically includes a first blocking member and a second blocking member. In this embodiment, the first blocking member and the second blocking member are respectively a clamping plate and a breast plate. Both the first blocking member and the second blocking member are connected to the side wall of the box body, and the first blocking member and the second blocking member together form a rotating cavity in the receiving cavity. The hooking end of the saw blade extends into the rotating cavity through the opening. Thus, when the saw blade drum rotates, the saw blade will drive the seed cotton to rotate in the opposite direction to the saw blade drum in the rotating cavity. In this way, the hooking efficiency of the saw blade drum can be improved. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a plan view of an embossed rib according to an embodiment of the present utility model;

[0032] Figure 2 This is a plan view of the middle box of a cotton ginning machine according to an embodiment of the present utility model;

[0033] Figure 3 This is a front view schematic diagram of an embossed rib according to an embodiment of the present utility model;

[0034] Figure 4 for Figure 3 Schematic diagram of the cross section of AA;

[0035] Figure 5 for Figure 3 A cross-sectional schematic diagram of BB;

[0036] Figure 6 for Figure 3 A cross-sectional schematic diagram of CC;

[0037] Figure 7 for Figure 3 Schematic diagram of the cross section of DD;

[0038] Figure 8 for Figure 3 A schematic diagram of the cross-section along the E direction.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Body; 11-Fixed section; 12-Transition section; 13-Main body section; 131-Mounting part; 132-Free end;

[0041] 2-Inset piece; 3-Connector; 4-Box body; 5-Rib frame; 6-Saw blade roller;

[0042] 7-Blocking structure; 71-First blocking element; 72-Second blocking element. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0045] According to an embodiment of the present invention, on one hand, a embossed rib is provided, such as... Figures 1 to 8 As shown, the device includes a body 1 and an insert 2. The body 1 includes a fixed section 11, a transition section 12, and a main body section 13, all of which are integrally formed. The transition section 12 is disposed between the fixed section 11 and the main body section 13. The fixed section 11 is adapted to connect with the rib frame 5. The fixed section 11, the transition section 12, and the main body section 13 are formed together with a continuous working surface for separating cotton fibers and discharging cotton seeds. An installation part 131 is provided on the working surface of the main body section 13 near the transition section 12. The insert 2 is disposed in the installation part 131. When the insert 2 is installed in the installation part 131, the surface of the insert 2 is flush with the working surface of the main body section 13. The width of the transition section 12 is smaller than the width of the fixed section 11 and the main body section 13.

[0046] The embossed ribs described above are mounted on the main body 1 via inserts 2. The main body 1 specifically includes a fixed section 11, a transition section 12, and a main body section 13, all of which are integrally formed. The transition section 12 is located between the fixed section 11 and the main body section 13. The fixed section 11 can be connected to the rib frame 5, thereby mounting the main body 1 onto the rib frame 5. Simultaneously, the fixed section 11, the transition section 12, and the main body section 13 are all formed with a continuous working surface. The working surface is specifically used for separating cotton fibers and discharging cotton seeds. The continuous working surface is designed to prevent the main body from breaking due to stress imbalance caused by discontinuity of the working surface. In addition, the working surface of the main body section 13 near the transition section 12 has an installation part 131. In this embodiment, the installation part 131 is an installation groove. The insert 2 is located in the installation part 131, and when the insert 2 is installed in the installation part 131, the surface of the insert 2 is flush with the working surface of the main body section 13 to ensure the continuity of the working surface.

[0047] Specifically, the insert 2 is an insert block made of wear-resistant material. Since cotton fibers rub against part of the working surface of the main body section 13, this part of the working surface of the main body section 13 wears out quickly. Furthermore, since the fixed section 11, the transition section 12 and the main body section 13 are an integral structure, the service life of the embossed rib is relatively low. Therefore, by installing the wear-resistant insert 2 in the mounting part 131 opened on the working surface of the main body section 13, the insert 2 rubs against the cotton fibers, which helps to improve the service life of the embossed rib.

[0048] In addition, the width of the transition section 12 is smaller than the width of the fixed section 11 and the main body section 13. Since the transition section 12 is located between the fixed section 11 and the main body section 13, the width of the transition section 12 is set to be smaller than the width of the main body section 13. This makes the two sides of the transition section 12 form a groove compared to the fixed section 11 and the main body section 13, thereby increasing the gap between two adjacent ginning ribs. As a result, when the saw blade hooks the cotton fibers, the cotton fibers can pass smoothly through the two sides of the transition section 12, which helps to avoid the situation where the cotton fibers block the gap between two adjacent ginning ribs.

[0049] In one embodiment, such as Figures 3 to 8 As shown, the main body segment 13 has a connecting end and a free end. The connecting end is connected to the transition segment 12. In the extension direction of the main body segment 13 from the connecting end to the mounting part 131, the width of the main body segment 13 gradually increases; in the extension direction of the main body segment 13 from the mounting part 131 to the free end 132, the width of the main body segment 13 gradually decreases.

[0050] The ginning ribs in the above structure have a connecting end and a free end 132 on the main body segment 13. The connecting end and the free end 132 are respectively located at both ends of the main body segment 13. The connecting end is connected to the transition segment 12. It should be noted that the connecting end itself does not exist. Specifically, it is the cross-sectional end face between the transition segment 12 and the main body segment 13. In the extension direction of the main body segment 13 from the connecting end to the mounting part 131, the width of the main body segment 13 gradually increases. In the extension direction from the mounting part 131 to the free end 132, the width of the main body segment 13 gradually decreases. This minimizes the gap between two adjacent ginning ribs in the mounting part, allowing for the separation of cotton fibers and cotton seeds through a small gap. The gap between two adjacent ginning ribs in the mounting part 131 and the free end 132 gradually increases. This further prevents cotton fibers from getting stuck. It should be noted that the gap between two adjacent ginning ribs cannot be greater than the waist diameter of the cotton seed to ensure that the cotton seed does not fall between the two adjacent ginning ribs.

[0051] In one embodiment, such as Figure 1As shown, the mounting part 131 is a mounting groove, the bottom surface of the mounting groove is a plane, and the insert 2 fits into the mounting groove.

[0052] The embossed ribs of the above structure have an installation part 131 as an installation groove, and the bottom surface of the installation groove is a plane. This facilitates the processing of the installation groove. In addition, the insert 2 and the installation groove are in conformal fit. Since the bottom surface of the installation groove is a plane, the processing of the insert 2 is also more convenient.

[0053] In one embodiment, such as Figure 1 As shown, it also includes a connector 3, which is disposed between the insert 2 and the main body segment 13 to connect the insert 2 and the main body segment 13.

[0054] The embossed ribs of the above structure are connected to the main body section 13 by a connector 3 set between the insert 2 and the main body section 13. In this embodiment, the connector 3 can be a screw, glue, etc., which will not be described in detail here. When the insert 2 is installed in the mounting groove, the connector 3 can connect the insert 2 and the main body section 13 together.

[0055] In one embodiment, such as Figures 1 to 3 As shown, the fixed section 11 has at least two connecting parts, which are spaced apart, and both connecting parts are adapted to be connected to the rib frame 5 via adapters to connect the body 1 and the rib frame 5.

[0056] The embossed ribs of the above structure are connected by two connecting parts on the fixed section 11. In this embodiment, the connecting parts are connecting holes. The two connecting parts are spaced apart, and both connecting parts can be connected to the rib frame 5 by an adapter. In this embodiment, the adapter is a screw to connect the body 1 and the rib frame 5 together. The two connecting parts are set to fix the embossed ribs as a whole and prevent rotation.

[0057] In one embodiment, such as Figures 4 to 8 As shown, in the vertically downward direction, both the transition section 12 and the main body section 13 are structures that slope inward and contract.

[0058] The calendering ribs described above have an inwardly inclined and contracted structure in the vertical direction, which makes the gap between two adjacent calendering ribs gradually increase in the vertical direction, thereby further preventing cotton fibers from blocking the gap.

[0059] According to an embodiment of the present invention, another aspect is provided: a middle box for a cotton ginning machine, such as... Figures 1 to 8As shown, the device includes a box body 4, a rib frame 5, and several ginned ribs. The box body 4 has a receiving cavity with an opening on one side, which is suitable for containing seed cotton. The rib frame 5 is disposed in the receiving cavity and connected to the side wall of the box body 4. Any ginned rib is the aforementioned ginned rib, and the fixed section 11 of any ginned rib is suitable for extending into the receiving cavity through the opening and connecting with the rib frame 5. All ginned ribs are spaced apart.

[0060] The ginning machine housing described above includes a rib frame 5 and several ginning ribs arranged within the housing 4. The housing 4 has a receiving cavity with an opening on one side, which can accommodate seed cotton. The rib frame 5 is arranged within the receiving cavity and connected to the side wall of the housing 4. Each ginning rib is the aforementioned ginning rib, and the fixed section 11 of each ginning rib can extend into the receiving cavity through the opening and connect with the rib frame 5. All the ginning ribs are spaced apart, allowing cotton fibers to pass through the gap between two adjacent ginning ribs.

[0061] Specifically, by setting the ginning ribs to the aforementioned ginning ribs, the service life of the ginning ribs is increased, thereby reducing the number of ginning rib replacements. This extends the working cycle of the ginning machine's inner box and also prevents cotton fiber blockage.

[0062] In one embodiment, such as Figure 2 As shown, it also includes a saw blade roller 6, which is rotatably disposed on one side of the housing 4, and part of the saw blade roller 6 is disposed in the receiving cavity through an opening. The saw blade roller 6 is used to hook cotton fibers.

[0063] In the ginning machine described above, the saw blade roller 6, which is located on one side of the box body 4, is rotated. Part of the saw blade roller 6 is set in the receiving cavity through an opening, so that the saw blade roller 6 can hook the seed cotton in the receiving cavity and separate the cotton fibers and cotton seeds.

[0064] In one embodiment, such as Figure 2 As shown, the saw blade drum 6 is provided with several saw blades, all of which are spaced apart, and any saw blade is positioned between two adjacent crimping ribs. The hook end of any saw blade is positioned in the receiving cavity through an opening.

[0065] The ginning machine with the above structure has several saw blades set on the saw blade drum 6. All the saw blades are spaced apart, and each saw blade is set between two adjacent ginning ribs. At the same time, the hooking end of each saw blade is set in the receiving cavity through an opening. So when the saw blade hooks the cotton fiber, the two adjacent ginning ribs can block the cotton seed, so that the cotton fiber and cotton seed can be separated.

[0066] In one embodiment, such as Figure 2 As shown, it also includes a blocking structure 7, which includes a first blocking member 71 and a second blocking member 72. The first blocking member 71 and the second blocking member 72 are both disposed in the receiving cavity and are both connected to the side wall of the box body 4. The first blocking member 71 and the second blocking member 72 together form a rotating cavity. Under the drive of the saw blade drum 6, the seed cotton is suitable to rotate relative to the saw blade drum 6 in the rotating cavity.

[0067] The cotton gin's inner box with the above-described structure includes a blocking structure 7 set within the receiving cavity. Specifically, the blocking structure 7 includes a first blocking member 71 and a second blocking member 72. In this embodiment, the first blocking member 71 and the second blocking member 72 are respectively a clamping plate and a breast plate. Both the first blocking member 71 and the second blocking member 72 are connected to the side wall of the box body 4, and together they form a rotating cavity within the receiving cavity. The hooking end of the saw blade extends into the rotating cavity through an opening. Thus, when the saw blade drum 6 rotates, the saw blade will drive the seed cotton to rotate in the opposite direction to the saw blade drum 6 within the rotating cavity, thereby improving the hooking efficiency of the saw blade drum 6.

[0068] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A type of embossed rib, characterized in that, include: The body (1) includes a fixed section (11), a transition section (12) and a main body section (13) of an integral structure. The transition section (12) is disposed between the fixed section (11) and the main body section (13). The fixed section (11) is adapted to be connected to the rib frame (5). The fixed section (11), the transition section (12) and the main body section (13) are formed together with a continuous working surface, which is used to separate cotton fibers and discharge cotton seeds; the width of the transition section (12) is smaller than the width of the fixed section (11) and the main body section (13).

2. The embossed rib according to claim 1, characterized in that, The main body section (13) has an installation part (131) on the working surface near the transition section (12); It also includes an insert (2), which is disposed in the mounting part (131). When the insert (2) is installed in the mounting part (131), the surface of the insert (2) is flush with the working surface of the main body segment (13).

3. The embossed rib according to claim 2, characterized in that, The main body segment (13) has a connecting end and a free end (132). The connecting end is connected to the transition segment (12). In the extension direction of the main body segment (13) from the connecting end to the mounting part (131), the width of the main body segment (13) gradually increases; in the extension direction of the main body segment (13) from the mounting part (131) to the free end (132), the width of the main body segment (13) gradually decreases.

4. The embossed rib according to claim 3, characterized in that, The mounting part (131) is a mounting groove, the bottom surface of the mounting groove is a plane, and the insert (2) fits the mounting groove in a conformal manner.

5. The embossed rib according to claim 4, characterized in that, It also includes a connector (3) disposed between the insert (2) and the main body segment (13) to connect the insert (2) and the main body segment (13).

6. The embossed rib according to claim 5, characterized in that, At least two connecting parts are provided on the fixed section (11), the two connecting parts are spaced apart, and both connecting parts are adapted to be connected to the rib frame (5) through an adapter to connect the body (1) and the rib frame (5).

7. The embossed rib according to claim 6, characterized in that, In the vertically downward direction, both the transition section (12) and the main body section (13) are structures that are inclined and contracted inward.

8. A middle box of a cotton ginning machine, characterized in that, include: Box (4), the box (4) has a receiving cavity with an opening on one side, the receiving cavity being suitable for holding seed cotton; Rib frame (5), the rib frame (5) is disposed in the receiving cavity and connected to the side wall of the box (4); A plurality of embossed ribs, wherein any one of the embossed ribs is the embossed rib according to any one of claims 1-6, wherein the fixed section (11) of any one of the embossed ribs is adapted to extend into the receiving cavity through the opening and connect with the rib frame (5), and all the embossed ribs are spaced apart.

9. The middle box of the cotton ginning machine according to claim 8, characterized in that, It also includes a saw blade roller (6), which is rotatably disposed on one side of the housing (4), and part of the saw blade roller (6) is disposed in the receiving cavity through the opening. The saw blade roller (6) is used to hook cotton fibers. The saw blade roller (6) is provided with a plurality of saw blades, all of which are spaced apart, and any one of the saw blades is positioned between two adjacent crimping ribs, and the hook end of any one of the saw blades is positioned in the receiving cavity through the opening.

10. The middle box of the cotton ginning machine according to claim 9, characterized in that, It also includes a blocking structure (7), which includes a first blocking member (71) and a second blocking member (72). The first blocking member (71) and the second blocking member (72) are both disposed in the receiving cavity and are both connected to the side wall of the box body (4). The first blocking member (71) and the second blocking member (72) together form a rotating cavity. Under the drive of the saw blade roller (6), the seed cotton is suitable to rotate relative to the saw blade roller (6) in the rotating cavity.

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