Sealed anti-caking spiral feeding device for caustic soda flakes

Abstract

The utility model discloses a sealed anti-caking caustic soda flake spiral feeding device which comprises a main box body, a feeding port is formed in the top of the main box body, a discharging port is formed in the bottom of the main box body, a spiral box body and a discharging box are arranged in the main box body and fixedly connected, and two parallel coarse spiral devices are arranged in the spiral box body and the discharging box in a penetrating mode. And a fine spiral device parallel to the coarse spiral devices is arranged between the two coarse spiral devices. The sealed anti-caking caustic soda flake spiral feeding device disclosed by the utility model solves the problem of inaccurate feeding of caustic soda flakes.

Description

Technical Field

[0001] The utility model belongs to the technical field of caustic soda flake production and packaging equipment, and in particular relates to a sealed and anti-caking caustic soda flake spiral feeding device. Background Art

[0002] At present, the chemical branch uses a semi-automatic packaging machine in the packaging process of finished caustic soda flakes. After the caustic soda flakes are produced, they need to be packaged. After passing through the caustic soda flake machine, they fall into the hopper. The material in the hopper is vibrated by the oscillator to pass the caustic soda flakes in the hopper into the material scale. After reaching a certain weight, the feeding valve is closed to stop the oscillation. This feeding method is relatively traditional. During the vibration process, the feeding speed is constant, so the weighing accuracy is difficult to control. In addition, during the vibration process, there is a lot of alkali dust, which affects the operating environment of personnel, and the equipment failure rate caused by alkali dust corrosion is high.

[0003] For technicians in this field, how to improve the accuracy of weighing flake caustic soda bags, reduce assembly gaps during the unloading process, increase the sealing of the equipment, reduce the number of times the feeding device is cleaned, and reduce the failure rate of the pen is a technical problem that needs to be solved at present. Utility Model Content

[0004] The utility model aims to provide a sealed and anti-caking caustic soda flake spiral feeding device, which solves the problem of inaccurate caustic soda flake feeding.

[0005] The technical solution adopted by the utility model is a sealed and anti-caking flake caustic soda spiral feeding device, comprising a main box body, a feed inlet is provided on the top of the main box body, a discharge outlet is provided on the bottom of the main box body, a spiral box body and a discharge box are provided inside the main box body, the spiral box body and the discharge box are fixedly connected, two parallel coarse spiral devices are provided through the spiral box body and the discharge box, and a fine spiral device parallel to the coarse spiral device is provided between the two coarse spiral devices.

[0006] The utility model is also characterized in that:

[0007] The discharge port is arranged at the tail output end of the fine screw device.

[0008] The coarse spiral device includes a first screw rod driving motor, the output end of the first screw rod driving motor is fixedly connected to the first screw rod, the first screw rod passes through the main box body, the spiral box body and the discharge box, the inner wall of the main box body is fixedly connected to the first fixed baffle, the other end of the first screw rod is fixedly connected to the first fixed baffle, a first blind hole is opened in the end of the first screw rod close to the first fixed baffle along the axial direction, a first stainless steel graphite self-lubricating bearing is installed in the first blind hole, a first stainless steel graphite self-lubricating bearing is provided with a first spiral top screw, the end surface of the first stainless steel graphite self-lubricating bearing away from the first fixed baffle is sleeved with a first stop ring on the outer wall of the first spiral top screw, the first spiral top screw passes through the discharge box and the main box body, a coarse spiral blade is fixedly connected to the outer wall of the first screw rod, and a plurality of first steel wire brushes are fixedly connected to the coarse spiral blade.

[0009] One end of the first spiral top screw is an axis structure, and the axis structure end of the first spiral top screw is interference fit with the first stainless steel graphite self-lubricating bearing. The other end of the first spiral top screw is a thread structure, and the thread structure end of the first spiral top screw passes through the discharge box and the main box body.

[0010] The contact surface between the first spiral rod and the spiral box is located on the inner wall of the spiral box and a first CPVC board is provided.

[0011] A first sprocket cover is arranged on the surface of the main box body at the first screw rod driving motor, and the first screw rod driving motor is arranged in the first sprocket cover.

[0012] The fine spiral device includes a second screw rod driving motor, a second screw rod is fixedly connected to the output end of the second screw rod driving motor, the second screw rod passes through the main box, the spiral box and the discharge box, a second fixed baffle is fixedly connected to the inner wall of the main box, the other end of the second screw rod is fixedly connected to the second fixed baffle, a second blind hole is opened in the end of the second screw rod close to the second fixed baffle along the axial direction, a second stainless steel graphite self-lubricating bearing is installed in the second blind hole, a second stainless steel graphite self-lubricating bearing is provided with a second spiral top screw, the end surface of the second stainless steel graphite self-lubricating bearing away from the second fixed baffle is sleeved with a second stop ring on the outer wall of the second spiral top screw, the second spiral top screw passes through the discharge box and the main box, a fine spiral blade is fixedly connected to the outer wall of the second screw rod, and a plurality of second steel wire brushes are fixedly connected to the fine spiral blade.

[0013] One end of the second spiral top screw is an axis structure, and the axis structure end of the second spiral top screw is interference fit with the second stainless steel graphite self-lubricating bearing. The other end of the second spiral top screw is a thread structure, and the thread structure end of the second spiral top screw passes through the discharge box and the main box body.

[0014] The contact surface between the second spiral rod and the spiral box is located on the inner wall of the spiral box and a second CPVC board is provided.

[0015] A second sprocket cover is arranged on the surface of the main box body at the second screw rod driving motor, and the second screw rod driving motor is arranged in the second sprocket cover.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a sealed and anti-caking caustic soda flake spiral feeding device, which improves the controllable accuracy of the caustic soda flake bag weight and improves the economic benefits of the enterprise by implementing a multi-stage spiral servo to control the speed of the caustic soda flake feeding device; improves the mechanical sealing by reducing the number of assembly gaps in the feeding box, reduces corrosion caused by leakage of alkali dust and reduces the failure rate; and installs a wire brush on the spiral blade to timely clean the alkali dust agglomeration phenomenon in the spiral blade and the feeding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model's sealed and anti-caking caustic soda flake spiral feeding device;

[0019] Figure 2 yes Figure 1 main view.

[0020] In the figure, 1. main box body, 2. feed port, 3. spiral box body, 4. discharge port, 5. first spiral rod, 6. coarse spiral blade, 7. fine spiral blade, 8. first spiral rod driving motor, 9. first CPVC plate, 10. first sprocket cover, 11. discharge box, 12. first fixed baffle, 13. first stainless steel graphite self-lubricating bearing, 14. first spiral top screw, 15. first backstop ring, 16. first wire brush, 17. second spiral rod driving motor, 18. second spiral rod, 19. second fixed baffle, 20. second stainless steel graphite self-lubricating bearing, 21. second spiral top screw, 22. second backstop ring, 23. second wire brush, 24. second CPVC plate, 25. second sprocket cover. DETAILED DESCRIPTION

[0021] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0022] The utility model provides a sealed and anti-caking caustic soda flake spiral feeding device, such as Figure 1 As shown, it includes a main box body 1, a feed port 2 is provided at the top of the main box body 1, a discharge port 4 is provided at the bottom of the main box body 1, a spiral box body 3 and a discharge box 11 are provided inside the main box body 1, the spiral box body 3 and the discharge box 11 are fixedly connected, two parallel coarse spiral devices are provided in the spiral box body 3 and the discharge box 11, and a fine spiral device parallel to the coarse spiral device is provided between the two coarse spiral devices. Figure 2As shown, the discharge port 4 is arranged at the tail output end of the fine spiral device; the coarse spiral device includes a first spiral rod driving motor 8, the output end of the first spiral rod driving motor 8 is fixedly connected to a first spiral rod 5, the first spiral rod 5 passes through the main box body 1, the spiral box body 3 and the discharge box 11, the inner wall of the main box body 1 is fixedly connected to a first fixed baffle 12, the other end of the first spiral rod 5 is fixedly connected to the first fixed baffle 12, which plays a role in supporting and fixing the first spiral rod 5 to prevent the spiral rod 5 from sliding back and forth, and a first blind hole is opened in the end of the first spiral rod 5 close to the first fixed baffle 12 along the axial direction, a first stainless steel graphite self-lubricating bearing 13 is installed in the first blind hole, a first stainless steel graphite self-lubricating bearing 13 is provided with a first spiral top screw 14, and the first stainless steel graphite self-lubricating shaft The end surface of the bearing 13 away from the first fixed baffle plate 12 is sleeved with a first stop ring 15 on the outer wall of the first spiral top screw 14, the first spiral top screw 14 passes through the discharge box 11 and the main box body 1, and the outer wall of the first spiral rod 5 is fixedly connected with a coarse spiral blade 6, and a plurality of first steel wire brushes 16 are fixedly connected to the coarse spiral blade 6. During the rotation of the spiral, the first steel wire brush 16 rotates with the rotation of the spiral, and can clean the alkaline dust crystals on the other group of spiral surfaces and the inner surfaces of the spiral box body 3 and the discharge box 11; one end of the first spiral top screw 14 is an axial structure, and the axial structure end of the first spiral top screw 14 is interference fit with the first stainless steel graphite self-lubricating bearing 13, and the other end of the first spiral top screw 14 is a threaded structure, and the threaded structure end of the first spiral top screw 14 passes through the discharge box 11 and The main box body 1; the contact surface between the first spiral rod 5 and the spiral box body 3 is located at the inner wall of the spiral box body 3, and a first CPVC plate 9 is provided to prevent leakage of caustic soda flakes; the surface of the main box body 1 is provided with a first sprocket cover 10 at the first spiral rod driving motor 8, and the first spiral rod driving motor 8 is arranged in the first sprocket cover 10; the fine spiral device includes a second spiral rod driving motor 17, and the output end of the second spiral rod driving motor 17 is fixedly connected to a second spiral rod 18, and the second spiral rod 18 runs through the main box body 1, the spiral box body 3 and the discharge box 11. The inner wall of the main box body 1 is fixedly connected to a second fixed baffle 19, and the other end of the second spiral rod 18 is fixedly connected to the second fixed baffle 19, which plays a role in supporting and fixing the second spiral rod 18 to prevent the second spiral rod 18 from sliding back and forth. The second spiral rod 18 is close to the second fixed baffle 19. A second blind hole is opened in the end portion near the second fixed baffle 19 along the axial direction, a second stainless steel graphite self-lubricating bearing 20 is installed in the second blind hole, a second stainless steel graphite self-lubricating bearing 20 is provided with a second spiral top screw 21, and the end surface of the second stainless steel graphite self-lubricating bearing 20 away from the second fixed baffle 19 is sleeved with a second stop ring 22 on the outer wall of the second spiral top screw 21, the second spiral top screw 21 penetrates the discharge box 11 and the main box body 1, and a fine spiral blade 7 is fixedly connected to the outer wall of the second spiral rod 18, and a plurality of second steel wire brushes 23 are fixedly connected to the fine spiral blade 7. During the rotation of the spiral, the second steel wire brush 23 rotates with the rotation of the spiral, and can clean the alkali dust crystals on the other group of spiral surfaces and the inner surfaces of the spiral box body 3 and the discharge box 11;One end of the second spiral top screw 21 is an axis structure, and the axis structure end of the second spiral top screw 21 is interference fit with the second stainless steel graphite self-lubricating bearing 20, and the other end of the second spiral top screw 21 is a threaded structure, and the threaded structure end of the second spiral top screw 21 penetrates the discharge box 11 and the main box body 1; the contact surface between the second spiral rod 18 and the spiral box body 3 is located on the inner wall of the spiral box body 3. A second CPVC plate 24 is provided to prevent the leakage of caustic soda flakes; the surface of the main box body 1 is provided with a second sprocket cover 25 at the second spiral rod driving motor 17, and the second spiral rod driving motor 17 is arranged in the second sprocket cover 25. ;

[0023] The sealed and anti-caking caustic soda flake spiral feeding device provided by the utility model has the following working principle: the material enters the spiral box body 3 in the main box body 1 from the feed port 2 at the top of the main box body 1, the material in the spiral box body 3 is driven by the first spiral rod driving motor 8 to drive the first spiral rod 5 to drive the coarse spiral blade 6, and the second spiral rod driving motor 17 drives the second spiral rod 18 to drive the fine spiral blade 7 to rotate at a uniform speed at the same time, and the material is conveyed to the discharge box 11. When a certain discharge amount is reached, the coarse spiral blade 6 stops rotating, and a small amount of material is conveyed to the discharge port 4 through the fine spiral blade 7, and finally to the finished product bag, so as to realize precise control.

[0024] Example 1

[0025] The sealed anti-caking caustic soda flake spiral feeding device proposed in this embodiment is as follows: Figure 1 As shown, it includes a main box body 1, a feed port 2 is opened on the top of the main box body 1, a discharge port 4 is opened on the bottom of the main box body 1, a spiral box body 3 and a discharge box 11 are arranged inside the main box body 1, the spiral box body 3 and the discharge box 11 are fixedly connected, two parallel coarse spiral devices are arranged through the spiral box body 3 and the discharge box 11, and a fine spiral device parallel to the coarse spiral device is arranged between the two coarse spiral devices.

[0026] Example 2

[0027] The sealed anti-caking caustic soda flake spiral feeding device proposed in this embodiment is as follows: Figure 1 As shown, it includes a main box body 1, a feed port 2 is provided at the top of the main box body 1, a discharge port 4 is provided at the bottom of the main box body 1, a spiral box body 3 and a discharge box 11 are provided inside the main box body 1, the spiral box body 3 and the discharge box 11 are fixedly connected, two parallel coarse spiral devices are provided in the spiral box body 3 and the discharge box 11, and a fine spiral device parallel to the coarse spiral device is provided between the two coarse spiral devices. Figure 2 As shown, the discharge port 4 is arranged at the tail output end of the fine screw device.

[0028] Example 3

[0029] The sealed anti-caking caustic soda flake spiral feeding device proposed in this embodiment is as follows: Figure 1As shown, it includes a main box body 1, a feed port 2 is provided at the top of the main box body 1, a discharge port 4 is provided at the bottom of the main box body 1, a spiral box body 3 and a discharge box 11 are provided inside the main box body 1, the spiral box body 3 and the discharge box 11 are fixedly connected, two parallel coarse spiral devices are provided in the spiral box body 3 and the discharge box 11, and a fine spiral device parallel to the coarse spiral device is provided between the two coarse spiral devices. Figure 2 As shown, the discharge port 4 is arranged at the tail output end of the fine spiral device; the coarse spiral device includes a first spiral rod driving motor 8, the output end of the first spiral rod driving motor 8 is fixedly connected to the first spiral rod 5, the first spiral rod 5 passes through the main box body 1, the spiral box body 3 and the discharge box 11, the inner wall of the main box body 1 is fixedly connected to the first fixed baffle 12, the other end of the first spiral rod 5 is fixedly connected to the first fixed baffle 12, and a first blind hole is opened in the end of the first spiral rod 5 close to the first fixed baffle 12 along the axial direction, a first stainless steel graphite self-lubricating bearing 13 is installed in the first blind hole, a first stainless steel graphite self-lubricating bearing 13 is provided with a first spiral top screw 14, and the end face of the first stainless steel graphite self-lubricating bearing 13 away from the first fixed baffle 12 is sleeved on the outer wall of the first spiral top screw 14 A first stop ring 15 is provided, a first spiral top screw 14 passes through the discharge box 11 and the main box body 1, a coarse spiral blade 6 is fixedly connected to the outer wall of the first spiral rod 5, and a plurality of first steel wire brushes 16 are fixedly connected to the coarse spiral blade 6; one end of the first spiral top screw 14 is an axial structure, and the axial structure end of the first spiral top screw 14 is interference fit with the first stainless steel graphite self-lubricating bearing 13, and the other end of the first spiral top screw 14 is a threaded structure, and the threaded structure end of the first spiral top screw 14 passes through the discharge box 11 and the main box body 1; the contact surface between the first spiral rod 5 and the spiral box body 3 is located at the inner wall of the spiral box body 3 and a first CPVC plate 9 is provided; a first sprocket cover 10 is provided on the surface of the main box body 1 at the first spiral rod drive motor 8, and the first spiral rod drive motor 8 is arranged in the first sprocket cover 10.

[0030] Example 4

[0031] The sealed anti-caking caustic soda flake spiral feeding device proposed in this embodiment is as follows: Figure 1 As shown, it includes a main box body 1, a feed port 2 is provided at the top of the main box body 1, a discharge port 4 is provided at the bottom of the main box body 1, a spiral box body 3 and a discharge box 11 are provided inside the main box body 1, the spiral box body 3 and the discharge box 11 are fixedly connected, two parallel coarse spiral devices are provided in the spiral box body 3 and the discharge box 11, and a fine spiral device parallel to the coarse spiral device is provided between the two coarse spiral devices. Figure 2As shown, the discharge port 4 is arranged at the tail output end of the fine spiral device; the coarse spiral device includes a first spiral rod driving motor 8, the output end of the first spiral rod driving motor 8 is fixedly connected to a first spiral rod 5, the first spiral rod 5 passes through the main box body 1, the spiral box body 3 and the discharge box 11, the inner wall of the main box body 1 is fixedly connected to a first fixed baffle 12, the other end of the first spiral rod 5 is fixedly connected to the first fixed baffle 12, a first blind hole is opened in the end of the first spiral rod 5 close to the first fixed baffle 12 along the axial direction, a first stainless steel graphite self-lubricating bearing 13 is installed in the first blind hole, a first stainless steel graphite self-lubricating bearing 13 is provided with a first spiral top screw 14, and the end surface of the first stainless steel graphite self-lubricating bearing 13 away from the first fixed baffle 12 is at the first spiral top screw 14 The outer wall is sleeved with a first stop ring 15, the first spiral top screw 14 passes through the discharge box 11 and the main box body 1, the outer wall of the first spiral rod 5 is fixedly connected with a coarse spiral blade 6, and a plurality of first steel wire brushes 16 are fixedly connected to the coarse spiral blade 6; one end of the first spiral top screw 14 is an axial structure, and the axial structure end of the first spiral top screw 14 is interference fit with the first stainless steel graphite self-lubricating bearing 13, and the other end of the first spiral top screw 14 is a threaded structure, and the threaded structure end of the first spiral top screw 14 passes through the discharge box 11 and the main box body 1; the contact surface between the first spiral rod 5 and the spiral box body 3 is located on the inner wall of the spiral box body 3. A first CPVC plate 9 is provided; the surface of the main box body 1 is provided with a first sprocket cover 10 at the first spiral rod drive motor 8, and the first spiral rod drive motor 8 is provided at the first sprocket The cover 10; the fine spiral device includes a second spiral rod driving motor 17, the output end of the second spiral rod driving motor 17 is fixedly connected to a second spiral rod 18, the second spiral rod 18 passes through the main box body 1, the spiral box body 3 and the discharge box 11, the inner wall of the main box body 1 is fixedly connected to a second fixed baffle 19, the other end of the second spiral rod 18 is fixedly connected to the second fixed baffle 19, and a second blind hole is opened in the end of the second spiral rod 18 close to the second fixed baffle 19 along the axial direction, a second stainless steel graphite self-lubricating bearing 20 is installed in the second blind hole, a second stainless steel graphite self-lubricating bearing 20 is provided with a second spiral top screw 21, and the end surface of the second stainless steel graphite self-lubricating bearing 20 away from the second fixed baffle 19 is sleeved with a second stop block on the outer wall of the second spiral top screw 21 The second screw top screw 21 passes through the discharge box 11 and the main box body 1, and the outer wall of the second screw rod 18 is fixedly connected with a fine spiral blade 7, and a plurality of second wire brushes 23 are fixedly connected to the fine spiral blade 7; one end of the second screw top screw 21 is an axis structure, and the axis structure end of the second screw top screw 21 is interference fit with the second stainless steel graphite self-lubricating bearing 20, and the other end of the second screw top screw 21 is a threaded structure, and the threaded structure end of the second screw top screw 21 passes through the discharge box 11 and the main box body 1; the contact surface between the second screw rod 18 and the spiral box body 3 is located on the inner wall of the spiral box body 3. A second CPVC plate 24 is provided; a second sprocket cover 25 is provided on the surface of the main box body 1 at the second screw rod drive motor 17, and the second screw rod drive motor 17 is arranged in the second sprocket cover 25.

Claims

1. Sealed and anti-caking caustic soda flake spiral feeding device, characterized in that: The invention comprises a main box body (1), wherein a feed port (2) is provided at the top of the main box body (1), and a discharge port (4) is provided at the bottom of the main box body (1); a spiral box body (3) and a discharge box (11) are provided inside the main box body (1); the spiral box body (3) and the discharge box (11) are fixedly connected; two parallel coarse spiral devices are provided through the spiral box body (3) and the discharge box (11); and a fine spiral device parallel to the coarse spiral device is provided between the two coarse spiral devices.

2. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 1 is characterized in that: The discharge port (4) is arranged at the tail output end of the fine screw device.

3. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 1 is characterized in that: The coarse spiral device comprises a first spiral rod driving motor (8), the output end of the first spiral rod driving motor (8) is fixedly connected to a first spiral rod (5), the first spiral rod (5) passes through the main box body (1), the spiral box body (3) and the discharge box (11), the inner wall of the main box body (1) is fixedly connected to a first fixed baffle (12), the other end of the first spiral rod (5) is fixedly connected to the first fixed baffle (12), a first blind hole is opened in the end of the first spiral rod (5) close to the first fixed baffle (12) along the axial direction, and a first screw rod (5) is installed in the first blind hole. A stainless steel graphite self-lubricating bearing (13), wherein a first spiral top screw (14) is arranged inside the first stainless steel graphite self-lubricating bearing (13), a first stop ring (15) is sleeved on the outer wall of the first spiral top screw (14) at the end surface of the first stainless steel graphite self-lubricating bearing (13) away from the first fixed baffle (12), the first spiral top screw (14) passes through the discharge box (11) and the main box body (1), a coarse spiral blade (6) is fixedly connected to the outer wall of the first spiral rod (5), and a plurality of first steel wire brushes (16) are fixedly connected to the coarse spiral blade (6).

4. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 3 is characterized in that: One end of the first spiral top screw (14) is an axial structure, the axial structure end of the first spiral top screw (14) is interference-fitted with the first stainless steel graphite self-lubricating bearing (13), and the other end of the first spiral top screw (14) is a threaded structure, the threaded structure end of the first spiral top screw (14) passes through the discharge box (11) and the main box body (1).

5. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 3 is characterized in that: The contact surface between the first spiral rod (5) and the spiral box (3) is located on the inner wall of the spiral box (3) and a first CPVC plate (9) is provided.

6. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 3 is characterized in that: A first sprocket cover (10) is provided on the surface of the main housing (1) at the location of the first screw rod driving motor (8), and the first screw rod driving motor (8) is arranged inside the first sprocket cover (10).

7. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 1 is characterized in that: The fine screw device comprises a second screw rod driving motor (17), the output end of the second screw rod driving motor (17) is fixedly connected to a second screw rod (18), the second screw rod (18) passes through the main box body (1), the screw box body (3) and the discharge box (11), the inner wall of the main box body (1) is fixedly connected to a second fixed baffle plate (19), the other end of the second screw rod (18) is fixedly connected to the second fixed baffle plate (19), a second blind hole is opened in the end of the second screw rod (18) close to the second fixed baffle plate (19) along the axial direction, and a second blind hole is arranged in the second blind hole. A second stainless steel graphite self-lubricating bearing (20) is provided, a second spiral top screw (21) is provided inside the second stainless steel graphite self-lubricating bearing (20), a second stop ring (22) is sleeved on the outer wall of the second spiral top screw (21) at the end surface of the second stainless steel graphite self-lubricating bearing (20) away from the second fixed baffle (19), the second spiral top screw (21) passes through the discharge box (11) and the main box body (1), a fine spiral blade (7) is fixedly connected to the outer wall of the second spiral rod (18), and a plurality of second steel wire brushes (23) are fixedly connected to the fine spiral blade (7).

8. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 7, characterized in that: One end of the second spiral top screw (21) is an axial structure, the axial structure end of the second spiral top screw (21) is interference-fitted with the second stainless steel graphite self-lubricating bearing (20), and the other end of the second spiral top screw (21) is a threaded structure, the threaded structure end of the second spiral top screw (21) passes through the discharge box (11) and the main box body (1).

9. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 7, characterized in that: The contact surface between the second spiral rod (18) and the spiral box (3) is located on the inner wall of the spiral box (3) and a second CPVC plate (24) is provided.

10. The sealed and anti-caking caustic soda flake spiral feeding device according to claim 7, characterized in that: A second sprocket cover (25) is provided on the surface of the main housing (1) at the location of the second screw rod driving motor (17), and the second screw rod driving motor (17) is arranged in the second sprocket cover (25).

Images