Rotary dryer for processing pesticide raw materials

Abstract

The utility model discloses a rotary dryer for pesticide raw material processing, which comprises a bottom plate, trapezoid supports fixed on two sides of the upper end of the bottom plate and a drying cylinder arranged between the trapezoid supports, a heater is fixed outside one side of the upper end of the bottom plate close to the trapezoid supports, the heater is connected with a metal hose, and the metal hose is connected with a rotating shaft. The upper end of the trapezoidal support is arranged on the rotary seat, the rotary seat is connected with the drying cylinder, the upper end of the drying cylinder is provided with the fan, the lower end of the fan is arranged on the filter screen, the filter screen is arranged on the inner side of the drying cylinder, and the lower end of the drying cylinder is provided with the feeding and discharging port. A rotary motor is arranged in the rotary seat on the right side of the drying cylinder and connected with a transmission column, the transmission column is fixed to the right side of the drying cylinder, a bearing is arranged in the middle in the rotary seat on the left side of the drying cylinder, and an outer cylinder is arranged on the inner side of the bearing; the drying device has the advantages that heating is even, and the drying effect and the drying efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pesticide raw material processing, in particular to a rotary dryer for pesticide raw material processing. Background Art

[0002] Pesticide raw material processing refers to: using various technical materials as raw materials, adding solvents or fillers, and adding surfactants, synergists, dispersants, stabilizers and other additives to produce various pesticide emulsions, powders, wettable powders, granules and suspensions (see pesticide dosage forms). Pesticide processing plants have large warehouses for raw materials and products. The main equipment in the workshops includes crushers, polarizers, dust collectors, mixers and dryers, etc.

[0003] In pesticide production, many materials are damp due to long storage time, so they need to be dried before use. However, the existing dryers have a long processing time, and the inside of the materials is still relatively damp after treatment, making it difficult to dry the inside evenly and fully. Some of the inner materials are difficult to be fully dried, and a high drying effect cannot be achieved. At the same time, it is difficult to disperse the materials, and the materials are heated unevenly, affecting the drying quality.

[0004] Therefore, in view of the above problems, we propose a rotary dryer for processing pesticide raw materials. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a rotary dryer which is evenly heated and improves the drying effect and drying efficiency, so as to solve the deficiencies of the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary dryer for processing pesticide raw materials, which includes a base plate, a trapezoidal bracket fixed on both sides of the upper end of the base plate and a drying cylinder arranged in the middle of the trapezoidal bracket, a heater is fixed to the outside of the upper end of the base plate close to one side of the trapezoidal bracket, the heater is connected to a metal hose, the metal hose is connected to a rotating shaft, the rotating shaft is arranged inside the drying cylinder close to the heater, the trapezoidal bracket is a trapezoidal structure, a rotating seat is arranged at the upper end of the trapezoidal bracket, the middle bearing of the rotating seat is connected to the drying cylinder, a fan is arranged at the upper end of the drying cylinder, a filter is arranged at the lower end of the fan, the filter is arranged on the inner side of the drying cylinder, and a material inlet and outlet are arranged at the lower end of the drying cylinder.

[0007] Preferably, a rotary motor is arranged inside the rotary seat on the right side of the drying cylinder, and the rotary motor is connected to a transmission column, and the transmission column is fixed to the right side of the drying cylinder;

[0008] Furthermore, a bearing is arranged in the middle of the rotating seat on the left side of the drying cylinder, an outer cylinder is arranged inside the bearing, an inner cylinder is arranged inside the outer cylinder, a positioning shaft is connected to the inner cylinder close to the drying cylinder, and the outer cylinder is fixed to the left side of the drying cylinder.

[0009] Preferably, the drying cylinder comprises an outer shell arranged on the surface of the drying cylinder, a heat-insulating layer arranged on the inner side of the outer shell, and an inner liner arranged on the inner side of the heat-insulating layer.

[0010] Preferably, the positioning shaft comprises an axial hole and an axial wheel, the axial hole is embedded with an inner cylinder, the inner cylinder is embedded with a metal hose, and the axial wheel is arranged in the middle of the axial hole.

[0011] Preferably, the rotating shaft comprises a first air outlet and a second air outlet, the first air outlet is a plurality of circular air vents arranged on the outer side of the surface of one side of the rotating shaft, and the second air outlet is arranged on the middle side of the surface of one side of the rotating shaft.

[0012] Preferably, the second air outlet is threadedly connected to a transmission column, and the transmission column is arranged in the middle of the drying cylinder. The first stirring rod is welded and fixed on the left and right sides of the transmission column, and the second stirring rod is welded and fixed on the upper and lower sides of the transmission column. The first stirring rod and the second stirring rod are both connected to the transmission column, and the first stirring rod and the second stirring rod are both provided with multiple ventilation holes.

[0013] Preferably, a butterfly valve body is nested and fixed in the middle of the outer side of the inlet and outlet, a cylinder cover is provided at the lower end of the butterfly valve body, the butterfly valve body includes a valve handle arranged on the outer side and a valve plate arranged on the inner side, and the valve plate is fixedly connected to the valve handle.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model provides a heater, a rotary motor and a first stirring rod and a second stirring rod arranged in the middle of a transmission column. During the rotary drying process of the drying cylinder, the rotary motor drives the drying cylinder to rotate in the reverse or forward direction, and the first stirring rod and the second stirring rod arranged inside the drying cylinder are used to stir and disperse the dried material inside the drying cylinder. The heater is connected to a rotating shaft through a metal hose, so that it passes through a first air outlet and a second air outlet arranged on one side of the rotating shaft, and the second air outlet is connected to the transmission column to transport a hot air flow to the first stirring rod and the second stirring rod. Air flow is generated inside the drying cylinder through a plurality of ventilation holes, so as to improve the heat transfer efficiency and accelerate the evaporation of water in the material, thereby improving the drying efficiency, and making the material heated more fully and evenly, thereby improving its drying efficiency and drying quality.

[0016] 2. The utility model generates negative pressure inside the drying cylinder by means of a fan disposed at the upper end of the drying cylinder. Under the action of the pressure difference, the air in the drying cylinder circulates, and the moisture evaporated from the material is sucked into the inside of the fan and discharged upward to the outside, so that the air in the drying cylinder is always kept dry, thereby improving the drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a rotary dryer for processing pesticide raw materials according to the utility model;

[0018] Figure 2 This is a schematic diagram of the inner structure of a rotary dryer for processing pesticide raw materials according to the utility model;

[0019] Figure 3 This is a schematic diagram of the enlarged structure of the interior of a rotary seat on one side of a rotary dryer for processing pesticide raw materials according to the utility model;

[0020] Figure 4 This is a schematic diagram of the internal stirring rod structure of a drying cylinder of a rotary dryer for processing pesticide raw materials according to the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the positioning shafts on both sides of the drying cylinder of a rotary dryer for processing pesticide raw materials according to the utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the positioning shafts on both sides of the drying cylinder of a rotary dryer for processing pesticide raw materials according to the utility model;

[0023] Figure 7 This is a schematic diagram of the internal air intake structure of a rotary dryer for processing pesticide raw materials according to the utility model;

[0024] Figure 8 This is a schematic diagram of the air inlet side structure of a rotary dryer for processing pesticide raw materials according to the utility model;

[0025] Fig. 9 This is a schematic diagram of the internal structure of the air inlet of a rotary dryer for processing pesticide raw materials according to the utility model;

[0026] Fig.10 This is a schematic diagram of the inner structure of the inlet and outlet of a rotary dryer for processing pesticide raw materials according to the utility model;

[0027] Fig.11 The utility model is a schematic diagram of the rotating structure of a butterfly valve inside the inlet and outlet of a rotary dryer for processing pesticide raw materials.

[0028] Explanations in the figure: 1. Bottom plate; 2. Trapezoidal bracket; 3. Rotating seat; 4. Drying cylinder; 5. Fan; 6. Heater; 7. Inlet and outlet; 8. Butterfly valve body; 9. Cylinder cover; 10. Rotating motor; 11. Transmission column; 12. First stirring rod; 13. Second stirring rod; 14. Filter; 15. Inner tank; 16. Insulation layer; 17. Outer shell; 18. Positioning shaft; 19. Outer cylinder; 20. Bearing; 21. Inner cylinder; 22. Rotating shaft; 23. Metal hose; 24. Shaft hole; 25. Shaft wheel; 26. First air outlet; 27. Second air outlet; 28. Valve plate; 29. ​​Valve handle. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Example

[0030] like Figure 1-2 As shown, this embodiment discloses a rotary dryer for processing pesticide raw materials, which includes a bottom plate 1, a trapezoidal bracket 2 fixed to both sides of the upper end of the bottom plate 1, and a drying cylinder 4 arranged in the middle of the trapezoidal bracket 2. A heater 6 is fixed to the outside of the upper end of the bottom plate 1 near the side of the trapezoidal bracket 2, the heater 6 is connected to a metal hose 23, the metal hose 23 is connected to a rotating shaft 22, and the rotating shaft 22 is arranged inside the drying cylinder 4 near the heater 6. The trapezoidal bracket 2 is a trapezoidal structure, a rotating seat 3 is arranged at the upper end of the trapezoidal bracket 2, the middle bearing of the rotating seat 3 is connected to the drying cylinder 4, a fan 5 is arranged at the upper end of the drying cylinder 4, a filter screen 14 is arranged at the lower end of the fan 5, and the filter screen 14 It is arranged on the inner side of the drying cylinder 4, and a material inlet and outlet port 7 is arranged on the lower end of the drying cylinder 4. A rotary motor 10 is arranged inside the rotary seat 3 on the right side of the drying cylinder 4, and the rotary motor 10 is connected with a transmission column 11, and the transmission column 11 is fixed on the right side of the drying cylinder 4. A bearing 20 is arranged in the middle of the rotary seat 3 on the left side of the drying cylinder 4, and an outer cylinder 19 is arranged on the inner side of the bearing 20, and an inner cylinder 21 is arranged on the inner side of the outer cylinder 19. The inner cylinder 21 is connected with a positioning shaft 18 close to the drying cylinder 4, and the outer cylinder 19 is fixed on the left side of the drying cylinder 4. The drying cylinder 4 includes an outer shell 17 arranged on the surface of the drying cylinder 4, a heat-insulating layer 16 arranged on the inner side of the outer shell 17, and an inner tank 15 arranged on the inner side of the heat-insulating layer 16.

[0031] In this embodiment, the drying cylinder 4 is formed by an inner liner 15, an insulating layer 16 and an outer shell 17, so that the insulation effect inside the drying cylinder 4 is improved, and at the same time, the residual pesticide raw materials inside the drying cylinder 4 can be removed more conveniently and effectively without affecting the secondary use. At the same time, through the bottom plate 1 and the trapezoidal bracket 2 arranged on both sides of the upper end of the bottom plate 1, and the rotating seat 3 arranged on the upper end of the trapezoidal bracket 2, the rotating seats 3 on both sides are conveniently provided with the transmission columns 11 and the inner cylinder 21 to support the drying cylinder 4, which can effectively improve the rotation efficiency of the drying cylinder 4, effectively improve its working efficiency, and at the same time improve its service life. Example

[0032] like Figure 1-3 As shown, this embodiment discloses a rotary dryer for processing pesticide raw materials, which includes a bottom plate 1, a trapezoidal bracket 2 fixed to both sides of the upper end of the bottom plate 1, and a drying cylinder 4 arranged in the middle of the trapezoidal bracket 2. A heater 6 is fixed to the outside of the upper end of the bottom plate 1 near the side of the trapezoidal bracket 2. The heater 6 is connected to a metal hose 23. The metal hose 23 is connected to a rotating shaft 22. The rotating shaft 22 is arranged inside the drying cylinder 4 near the heater 6. The trapezoidal bracket 2 is a trapezoidal structure. A rotating seat 3 is arranged on the upper end of the trapezoidal bracket 2. The middle bearing of the seat 3 is connected to the drying cylinder 4, the upper end of the drying cylinder 4 is provided with a fan 5, the lower end of the fan 5 is provided with a filter 14, the filter 14 is provided inside the drying cylinder 4, the lower end of the drying cylinder 4 is provided with an inlet and outlet 7, the right side of the drying cylinder 4 is provided with a rotary motor 10 inside the rotary seat 3, the rotary motor 10 is connected with a transmission column 11, the transmission column 11 is fixed to the right side of the drying cylinder 4, the left side of the drying cylinder 4 is provided with a bearing 20 in the middle of the rotary seat 3, the inner side of the bearing 20 is provided with an outer cylinder 19, and the inner side of the outer cylinder 19 is provided with an inner cylinder 21, the inner cylinder 21 is connected with a positioning shaft 18 near the drying cylinder 4, the outer cylinder 19 is fixed to the left side of the drying cylinder 4, the drying cylinder 4 includes an outer shell 17 arranged on the surface of the drying cylinder 4, a heat preservation layer 16 arranged on the inner side of the outer shell 17 and an inner liner 15 arranged on the inner side of the heat preservation layer 16, the positioning shaft 18 includes an axis hole 24 and an axis wheel 25, the axis hole 24 is embedded in the inner cylinder 21, the inner cylinder 21 is embedded with a metal hose 23, the axis wheel 25 is arranged in the middle of the axis hole 24, the rotating shaft 22 includes a first air outlet 26 and a second air outlet 27, the first air outlet A plurality of circular air vents 26 are arranged on the outer side of the surface of one side of the rotating shaft 22, a second air outlet 27 is arranged on the middle side of the surface of one side of the rotating shaft 22, the second air outlet 27 is threadedly connected with a transmission column 11, the transmission column 11 is arranged in the middle of the drying cylinder 4, the first stirring rod 12 is welded and fixed on the left and right sides of the transmission column 11, the second stirring rod 13 is welded and fixed on the upper and lower sides of the transmission column 11, the first stirring rod 12 and the second stirring rod 13 are both connected to the transmission column 11, and the first stirring rod 12 and the second stirring rod 13 are both provided with a plurality of air vents.

[0033] In this embodiment, the rotary motor 10 arranged inside the right rotating seat 3 at the upper end of the trapezoidal bracket 2 provides the drying cylinder 4 with reverse or forward rotation. At the same time, the bearing 20 arranged inside the left rotating seat 3 and the positioning shaft 18 embedded in the inner side of the bearing 20 assist the drying cylinder 4 to rotate reversely or forwardly, so as to improve its rotation efficiency. At the same time, through the inner cylinder 21 embedded in the positioning shaft 18, the metal hose 23 embedded in the inner cylinder 21 is used to transport the hot air flow to the inside of the drying cylinder 4 through the heater 6 through the metal hose 23, so that the moisture in the pesticide raw materials evaporated by the hot air flow is absorbed into the inside of the fan 5 through the material, and discharged upward to the outside, so that the air in the drying cylinder 4 is always kept in a dry state, thereby improving the drying effect. Example

[0034] like Figure 1-11 As shown, the present embodiment discloses a rotary dryer for processing pesticide raw materials, which comprises a bottom plate 1, a trapezoidal bracket 2 fixed on both sides of the upper end of the bottom plate 1, and a drying cylinder 4 arranged in the middle of the trapezoidal bracket 2. A heater 6 is fixed to the outside of the upper end of the bottom plate 1 close to the trapezoidal bracket 2, the heater 6 is connected to a metal hose 23, the metal hose 23 is connected to a rotating shaft 22, the rotating shaft 22 is arranged inside the drying cylinder 4 near the heater 6, the trapezoidal bracket 2 is a trapezoidal structure, the upper end of the trapezoidal bracket 2 is arranged on a rotating seat 3, the middle bearing of the rotating seat 3 is connected to the drying cylinder 4, the upper end of the drying cylinder 4 is provided with a fan 5, the lower end of the fan 5 is arranged on a filter 14, the filter 14 is arranged on the inner side of the drying cylinder 4, the lower end of the drying cylinder 4 is provided with an inlet and outlet 7, a butterfly valve body 8 is nested and fixed in the middle of the outer side of the inlet and outlet 7, a cylinder cover 9 is arranged at the lower end of the butterfly valve body 8, and the butterfly valve body 8 includes a valve handle 29 arranged on the outer side. and a valve plate 28 arranged on the inner side, the valve plate 28 is fixedly connected to the valve handle 29, a rotary motor 10 is arranged inside the rotary seat 3 on the right side of the drying cylinder 4, the rotary motor 10 is connected to a transmission column 11, the transmission column 11 is fixed to the right side of the drying cylinder 4, a bearing 20 is arranged in the middle of the rotary seat 3 on the left side of the drying cylinder 4, an outer cylinder 19 is arranged inside the bearing 20, an inner cylinder 21 is arranged inside the outer cylinder 19, the inner cylinder 21 is connected with a positioning shaft 18 close to the drying cylinder 4, the outer cylinder 19 is fixed to the left side of the drying cylinder 4, the positioning shaft 18 includes an axis hole 24 and an axis wheel 25, the axis hole 24 is embedded with the inner cylinder 21, the inner cylinder 21 is embedded with a metal hose 23, the axis wheel 25 is arranged in the middle of the axis hole 24, the rotating shaft 22 includes a first air outlet 26 and a second air outlet 27, the first air outlet 26 is a plurality of circular vents arranged on the outer side of the surface of one side of the rotating shaft 22, and the second air outlet 27 is arranged on the middle side of the surface of one side of the rotating shaft 22.

[0035] In this embodiment, the drying cylinder 4 is stably fixed in the middle of the trapezoidal bracket 2 by the drive column 11 and the positioning shaft 18 provided on the left and right sides of the drying cylinder 4. The drying cylinder 4 is driven to rotate by the rotary motor 10 through the drive column 11. The rotation of the drying cylinder 4 drives the inner fan of the fan 5 provided on the upper end of the drying cylinder 4 to rotate, so that negative pressure is generated inside the drying cylinder 4. Under the action of the pressure difference, the air in the drying cylinder 4 is circulated, and the moisture evaporated from the material is sucked into the inside of the fan 5 and discharged upward to the outside, so that the air in the drying cylinder 4 is always kept in a dry state, thereby improving the drying effect. At the same time, a butterfly valve body 8 is provided at the bottom of the drying cylinder 4, and the butterfly valve body 8 forms a butterfly valve through the valve plate 28 and the valve handle 29, so that the butterfly valve is used to prevent the material from spilling when the drying cylinder 4 rotates. At the same time, the material in the drying cylinder 4 is fed in and out through the butterfly valve and the cylinder cover 9.

[0036] The working principle of the present invention is as follows: when in use, the cylinder cover 9 and the rotary valve handle 29 are opened to put the pesticide raw materials to be dried at the inlet and outlet 7. After the pesticide raw materials are put in, the cylinder cover 9 and the rotary valve handle 29 are closed to make the valve plate 28 seal the inlet and outlet 7. The driving column 11 connected to the rotary motor 10 is used to make the drying cylinder 4 rotate in the reverse and forward direction. At the same time, the auxiliary drying cylinder 4 is rotated through the bearing 20 and the outer cylinder 19. The heater 6 conveys hot air flow to the inside of the drying cylinder 4 through the metal hose 23. The second air outlet 27 set on the rotating shaft 22 is threadedly connected to the driving column 11, so that the first stirring rod 12 and the second stirring rod 13 connected to the driving column 11 are welded and connected. The pesticide raw materials are stirred, and at the same time, the hot air flow is used to generate air flow inside the drying cylinder 4 through the air vents provided on the first stirring rod 12 and the second stirring rod 13, so as to improve the heat transfer efficiency and accelerate the evaporation of moisture in the material, thereby improving the drying efficiency, and making the material heated more fully and evenly, thereby improving its drying efficiency and drying quality. At the same time, the upper end fan 5 is driven by the rotation of the drying cylinder 4, so that negative pressure is generated inside the drying cylinder 4. Under the action of the pressure difference, the gas generated by the fan 5 and the hot air in the drying cylinder 4 are circulated, and the moisture evaporated from the material is sucked into the inside of the fan 5 and discharged upward to the outside, so that the air in the drying cylinder 4 is always kept in a dry state, thereby improving the drying effect.

[0037] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rotary dryer for processing pesticide raw materials, comprising a bottom plate (1), ladder-shaped brackets (2) arranged on both sides of the upper end of the bottom plate (1), and a drying cylinder (4) arranged between the ladder-shaped brackets (2), characterized in that: A heater (6) is fixed to the outside of the upper end of the bottom plate (1) near the trapezoidal bracket (2), the heater (6) is connected to a metal hose (23), the metal hose (23) is connected to a rotating shaft (22), the rotating shaft (22) comprises a first air outlet (26) and a second air outlet (27), the first air outlet (26) is a plurality of circular vent holes arranged on the outside of the surface of the rotating shaft (22), and the second air outlet (27) is arranged in the middle of the surface of the rotating shaft (22); The second air outlet (27) is threadedly connected to a transmission column (11), the transmission column (11) being arranged in the middle of the drying cylinder (4), the first stirring rod (12) being welded and fixed on the left and right sides of the transmission column (11), the second stirring rod (13) being welded and fixed on the upper and lower sides of the transmission column (11), the first stirring rod (12) and the second stirring rod (13) being both connected to the transmission column (11), and the first stirring rod (12) and the second stirring rod (13) being both provided with a plurality of ventilation holes; The rotating shaft (22) is arranged inside the drying cylinder (4); the trapezoidal bracket (2) is a trapezoidal structure; a rotating seat (3) is arranged at the upper end of the trapezoidal bracket (2); the rotating seat (3) is connected to the drying cylinder (4); a fan (5) is arranged at the upper end of the drying cylinder (4); a filter screen (14) is arranged at the lower end of the fan (5); the filter screen (14) is arranged inside the drying cylinder (4); and a material inlet and outlet port (7) is arranged at the lower end of the drying cylinder (4); A rotary motor (10) is disposed inside the rotary seat (3) on the right side of the drying cylinder (4); the rotary motor (10) is connected to a transmission column (11); and the transmission column (11) is fixed to the right side of the drying cylinder (4); A bearing (20) is arranged in the middle of the rotating seat (3) on the left side of the drying cylinder (4), an outer cylinder (19) is arranged inside the bearing (20), an inner cylinder (21) is arranged inside the outer cylinder (19), and the inner cylinder (21) is connected to a positioning shaft (18) near the drying cylinder (4).

2. The rotary dryer for processing pesticide raw materials according to claim 1, characterized in that: The drying cylinder (4) comprises an outer shell (17) arranged on the surface of the drying cylinder (4), a heat-insulating layer (16) arranged on the inner side of the outer shell (17), and an inner liner (15) arranged on the inner side of the heat-insulating layer (16).

3. The rotary dryer for processing pesticide raw materials according to claim 1, characterized in that: The positioning shaft (18) comprises a shaft hole (24) and a shaft wheel (25); an inner cylinder (21) is embedded in the shaft hole (24); a metal hose (23) is embedded in the inner cylinder (21); and the shaft wheel (25) is arranged in the middle of the shaft hole (24).

4. The rotary dryer for processing pesticide raw materials according to claim 1, characterized in that: A butterfly valve body (8) is nested and fixed on the outside of the material inlet and outlet (7), and a cylinder cover (9) is provided at the lower end of the butterfly valve body (8).

5. The rotary dryer for processing pesticide raw materials according to claim 4, characterized in that: The butterfly valve body (8) comprises a valve handle (29) arranged on the outside and a valve plate (28) arranged on the inside of the inlet and outlet (7), and the valve plate (28) is fixedly connected to the valve handle (29).

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