Pulverizer convenient for replacing silencing cotton

Abstract

The utility model discloses a pulverizer convenient to replace silencing cotton, and particularly relates to the technical field of pulverizing equipment, the pulverizer comprises a pulverizing box, two sides of the pulverizing box are respectively provided with a feed port and a discharge port, the discharge port is located above the feed port, and the side wall of the pulverizing box is provided with a cavity. The handle is pulled to drive the arc block so as to drive the support and the supporting plate, the supporting plate drags the silencing cotton above the supporting plate to move synchronously, the support and the silencing cotton arranged in the cavity can be pulled out synchronously so as to be replaced, after the silencing cotton is replaced, the support and the supporting plate are inserted into the cavity, and the magnetic strip and the smashing box are adsorbed and fixed. The silencing cotton in the cavity formed in the inner wall of the crushing box can be replaced conveniently, and use is convenient; according to the utility model, through the fixing mechanism, the two shells can be conveniently disassembled, so that the silencing cotton on the inner sides of the shells can be conveniently replaced, the shells can be quickly assembled and fixed, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverizing equipment, in particular to a pulverizer which is convenient for replacing silencer cotton. Background Art

[0002] As people's health awareness increases, the demand for food gradually turns to low sugar, low calories, high fiber and other directions. As an important food raw material, the quality of flour directly affects the nutritional value and health of the final product. The "flour" we often refer to refers to wheat flour, that is, flour ground from wheat. The name "high-gluten wheat flour" refers to the flour we usually call. Wheat flour is divided into special flour (such as bread flour, dumpling flour, biscuit flour, etc.), general flour (such as standard flour), and nutritionally fortified flour (such as calcium-enriched flour, iron-rich flour, "7+1" nutritionally fortified flour, etc.) according to performance and use; it is divided into special first-class flour, special second-class flour, standard flour, ordinary flour, etc. according to precision; it is divided into high-gluten flour, medium-gluten flour and low-gluten flour according to gluten strength; and when producing flour, some bran and debris will be left after wheat is ground into flour and sieved, which are called "bran" and "bran", and these brans will be reduced to powder by crushing equipment and mixed with flour.

[0003] At present, most of the equipment used for crushing bran produced in the flour production process will generate loud noise during use. Long-term exposure to such an environment will cause damage to the human body. Therefore, a cavity is usually opened inside the side wall of the equipment and filled with sound-absorbing cotton to reduce the noise. However, the use of the sound-absorbing cotton requires regular disassembly and replacement, and the method of filling the sound-absorbing cotton into the cavity makes it inconvenient to replace, and its practicality is relatively poor. Utility Model Content

[0004] The purpose of the utility model is to provide a pulverizer for convenient replacement of silencer cotton, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a pulverizer for convenient replacement of silencer cotton, comprising a pulverizing box, wherein a feed port and a discharge port are respectively arranged on both sides of the pulverizing box, and the discharge port is located above the feed port, a cavity is opened on the side wall of the pulverizing box, and the cavity passes through the top of the pulverizing box, and silencer cotton is arranged in the cavity, an auxiliary motor is arranged on the top of the pulverizing box, and a rotating block 1 is connected to the output end of the auxiliary motor in the pulverizing box, and a rotating block 2 is rotatably installed below the rotating block 1 at the bottom of the pulverizing box, a main motor is arranged on one side of the pulverizing box, and a pulley is sleeved on the lower end of the connecting shaft of the rotating block 2 outside the pulverizing box and outside the output end of the main motor, and the two pulleys are connected by a belt, and the outer walls of the rotating block 1 and the rotating block 2 are each provided with a plurality of pulverizing Tooth one, the inner wall of the crushing box is provided with a plurality of crushing teeth two meshing with the crushing tooth one, one side of the crushing box is provided with a feed pipe connected to the feed port, the outer side of the feed pipe is provided with a front-to-back symmetrical shell, the outer side of the shell is provided with a fixing mechanism, a plurality of sound-absorbing cottons are provided between the shell and the feed pipe, a mounting mechanism is provided in the cavity of the side wall of the crushing box, the mounting mechanism includes a bracket, and a plurality of brackets are symmetrically arranged, the left and right brackets are respectively provided with a feed pipe and a discharge pipe corresponding to the feed port and the discharge port, a support plate is connected to the bottom end of the bracket, an arc block connected to the bracket is provided at the opening of the cavity, the bottom of the arc block is embedded with magnetic strips on the inside and outside of the bracket, a handle is connected to the top of the arc block, and the sound-absorbing cotton in the cavity is located on one side of the outer wall of the bracket.

[0006] Furthermore, the fixing mechanism includes a fixing block, and the fixing blocks are provided with a plurality of fixing blocks, the fixing block is fixedly installed on the side of the shell located at the rear away from the crushing box, the fixing block is provided with a chamber 1 at the lower part, a rotating shaft is rotatably installed in the chamber 1, a sprocket is sleeved on the outer wall of the rotating shaft, a chain is meshed on one side of the sprocket, and one end of the chain is with the other side of the shell located at the rear of the feed pipe, an opening adapted to the chain is provided on one side of the fixing block, a chamber 2 is provided on the upper part of the fixing block above the chamber 1, a ratchet is sleeved on the outer wall of the upper end of the rotating shaft in the chamber 2, a rotating rod is rotatably installed on one side of the bottom of the chamber 2, and a handle is connected to the upper end of the rotating rod outside the fixing block, and a clamping block and A torsion spring is provided, and the card block is meshed with the ratchet, the two ends of the torsion spring are respectively fixedly connected to the card block and the inner wall of chamber two, a chamber three is opened on one side of chamber two in the fixed block, a baffle two is provided in the chamber three, a U-shaped rod is provided on the top of the fixed block, and the lower end of the U-shaped rod is fixedly connected to baffle two, a spring is sleeved on the outside of the U-shaped rod between baffle two and the inner top wall of chamber three, the bottom of baffle two is connected with baffle one, and a lower end of the baffle is inserted into a slot opened in the bottom of the opening, and baffle one is located on the side of the chain away from the rotating shaft, and the outer shell can be easily disassembled through the fixing mechanism, thereby facilitating the replacement of the silencer cotton on the outside of the feed pipe, and it is easy to use, and the use of silencer cotton reduces the noise generated at the feed pipe.

[0007] Furthermore, the plurality of brackets are arc structures of the same size, the cross section of the arc block is an inverted convex shape, and the crushing box is made of a metal material that is attracted to the magnetic strip so that it can be adsorbed and fixed to the crushing box to achieve positioning.

[0008] Furthermore, the rotating shaft and the rotating rod are both rotatably connected to the fixed block via bearings, the clamping block is arc-shaped, and is fixedly connected to the rotating rod, and the clamping block is located on the side of the ratchet away from the crushing box, so that the clamping block can be engaged with the ratchet to limit the rotating shaft, thereby preventing the rotating shaft from rotating and causing the sprocket and chain to loosen, affecting the fixing effect between the two shells.

[0009] Furthermore, the two ends of the spring are fixedly connected to baffle 2 and the inner wall of chamber 3 respectively, and the side surface of baffle 1 is in contact with the chain to provide power for resetting baffle 1. Baffle 1 can block and limit the chain to ensure that the chain is engaged with the sprocket.

[0010] Furthermore, the shell is formed by combining a semicircular structure with a cross-section and an arc-shaped structure with a cross-section. Sealing strips are embedded and installed on the relative walls of the two shells to ensure that the combined connection of the two is well sealed and can limit each other to prevent misalignment.

[0011] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0012] 1. The utility model can drive the arc block and then drive the bracket and the support plate through the installation mechanism by pulling the handle, so that the support plate drags the silencer cotton above it to move synchronously, and the silencer cotton set in the bracket and the cavity can be pulled out synchronously for replacement. After replacing the silencer cotton, the bracket and the support plate can be inserted into the cavity, and the magnetic strip is used to fix the crushing box by adsorption, so that it is convenient to replace the silencer cotton in the cavity opened on the inner wall of the crushing box, which is convenient to use;

[0013] 2. The utility model can conveniently disassemble the two shells through the fixing mechanism, so as to facilitate the replacement of the silencer cotton inside, and can quickly assemble and fix the shells, which is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure between the bracket and the support plate of the utility model;

[0017] Figure 3It is a schematic diagram of the structure between the U-shaped rod and the second baffle of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure between the ratchet and the clamping block of the utility model;

[0019] Figure 5 This utility model Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0020] Figure 6 This utility model Figure 1 A schematic diagram of the enlarged structure of B;

[0021] In the figure: 1. crushing box; 2. auxiliary motor; 3. rotating block 1; 4. rotating block 2; 5. main motor; 6. pulley; 7. belt; 8. crushing tooth 1; 9. crushing tooth 2; 10. sound-absorbing cotton; 11. shell; 12. feed pipe; 13. fixed block; 14. rotating shaft; 15. sprocket; 16. chain; 17. baffle 1; 18. baffle 2; 19. U-shaped rod; 20. spring; 21. ratchet; 22. rotating rod; 23. block; 24. torsion spring; 25. bracket; 26. support plate; 27. arc block; 28. magnetic strip. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 - Figure 6The pulverizer with convenient replacement of silencer cotton shown in the figure comprises a pulverizing box 1, a feed port and a discharge port are respectively arranged on both sides of the pulverizing box 1, and the discharge port is located above the feed port, a cavity is opened on the side wall of the pulverizing box 1, and the cavity runs through the top of the pulverizing box 1, and silencer cotton 10 is arranged in the cavity, an auxiliary motor 2 is arranged on the top of the pulverizing box 1, and the output end of the auxiliary motor 2 is connected with a rotating block 3 in the pulverizing box 1, and a rotating block 2 4 is rotatably installed below the rotating block 1 3 at the bottom of the pulverizing box 1, a main motor 5 is arranged on one side of the pulverizing box 1, and the lower end of the connecting shaft of the rotating block 2 4 is sleeved with a pulley 6 outside the pulverizing box 1 and outside the output end of the main motor 5, and the two pulleys 6 are connected by a belt 7, and the outer walls of the rotating blocks 1 3 and 2 are each provided with a plurality of pulverizing teeth 1 8, and the inner wall of the pulverizing box 1 is provided with a plurality of pulverizing teeth 2 9 meshing with the pulverizing teeth 1 8, and one side of the pulverizing box 1 is provided with a plurality of pulverizing teeth 1 8 meshing with the pulverizing teeth 1 8. The material port is connected to a feed pipe 12, and a front-to-back symmetrical shell 11 is provided on the outside of the feed pipe 12, a fixing mechanism is provided on the outside of the shell 11, and a number of sound-absorbing cottons 10 are provided between the shell 11 and the feed pipe 12. A mounting mechanism is provided in the cavity of the side wall of the crushing box 1, and the mounting mechanism includes a bracket 25, and a plurality of brackets 25 are symmetrically arranged. The left and right brackets 25 are respectively provided with a feed pipe and a discharge pipe corresponding to the feed port and the discharge port. In this example, the arrangement of the bracket 25 can realize the replacement of a certain part of the sound-absorbing cotton 10 separately, which is more convenient to use. A support plate 26 is connected to the bottom end of the bracket 25, and an arc block 27 connected to the bracket 25 is provided at the opening of the cavity. Magnetic strips 28 are embedded on the inside and outside of the bracket 25 at the bottom of the arc block 27, and a handle is connected to the top of the arc block 27. The sound-absorbing cotton 10 in the cavity is located on one side of the outer wall of the bracket 25.

[0024] In this example, the fixing mechanism includes a fixing block 13, and the fixing blocks 13 are provided in plurality. The fixing block 13 is fixedly installed on the side of the outer shell 11 located at the rear and away from the crushing box 1. A chamber 1 is provided in the lower part of the fixing block 13, and a rotating shaft 14 is rotatably installed in the chamber 1. A sprocket 15 is sleeved on the outer wall of the rotating shaft 14. A chain 16 is meshed on one side of the sprocket 15, and one end of the chain 16 is connected to the other side of the outer shell 11 located at the rear of the feed pipe 12. An opening adapted to the chain 16 is provided on one side of the fixing block 13. A chamber 2 is provided on the upper part of the fixing block 13 above the chamber 1. A ratchet 21 is sleeved on the outer wall of the upper end of the rotating shaft 14 in the chamber 2. A rotating rod 22 is rotatably installed on one side of the bottom of the chamber 2, and a handle is connected to the upper end of the rotating rod 22 outside the fixing block 13. A clamping block 23 and a torsion spring 24 are sleeved on the outer wall of the rotating rod 22. The block 23 is meshed with the ratchet 21, and the two ends of the torsion spring 24 are fixedly connected to the block 23 and the inner wall of the chamber two respectively. A chamber three is opened on one side of the chamber two in the fixed block 13, and a baffle two 18 is arranged in the chamber three. A U-shaped rod 19 is arranged on the top of the fixed block 13, and the lower end of the U-shaped rod 19 is fixedly connected to the baffle two 18. A spring 20 is sleeved on the outside of the U-shaped rod 19 between the baffle two 18 and the inner top wall of the chamber three. The bottom of the baffle two 18 is connected to the baffle one 17, and the lower end of the baffle one 17 is inserted into the slot opened in the bottom of the opening. The baffle one 17 is located on the side of the chain 16 away from the rotating shaft 14. Through the fixing mechanism, the outer shell 11 can be easily disassembled, so as to facilitate the replacement of the silencer cotton 10 on the outside of the feed pipe 12. It is easy to use, and the use of the silencer cotton 10 reduces the noise generated at the feed pipe 12. In this example, the brackets 25 are all arc-shaped structures of the same size, the cross section of the arc block 27 is an inverted convex shape, and the crushing box 1 is made of a metal material that is attracted to the magnetic strip 28, so that it can be adsorbed and fixed to the crushing box 1 to achieve positioning. In this example, the rotating shaft 14 and the rotating rod 22 are both rotatably connected to the fixed block 13 through bearings, the clamping block 23 is arc-shaped, and the clamping block 23 is fixedly connected to the rotating rod 22. The clamping block 23 is located on the side of the ratchet 21 away from the crushing box 1, so that the clamping block 23 is engaged with the ratchet 21 to achieve the restriction of the rotating shaft 14, and prevent the rotating shaft 14 from rotating and causing the sprocket 15 and the chain 16 to loosen, affecting the fixing effect between the two shells 11. In this example, the two ends of the spring 20 are fixedly connected to the baffle 2 18 and the inner wall of the chamber 3 respectively, and the side of the baffle 1 17 is in contact with the chain 16 to provide power for the reset of the baffle 1 17. The baffle 1 17 can block and limit the chain 16 to ensure that the chain 16 is engaged with the sprocket 15. In this example, the housing 11 is formed by a combination of a semicircular structure with a cross-section and an arc-shaped structure with a U-shaped cross-section. Sealing strips are embedded and installed on the opposite walls of the two housings 11 to ensure that the combined connection between the two is well sealed and can limit each other to prevent misalignment.

[0025] The working principle of the utility model is as follows: when in use, the bran is introduced into the crushing box 1 through the feed pipe 12, and the main motor 5 cooperates with the pulley 6 and the belt 7 to drive the rotating block 2 4 to rotate, and at the same time, the auxiliary motor 2 is started to drive the rotating block 1 3 to rotate, so that the rotating block 2 4 and the rotating block 1 3 drive the crushing tooth 1 8 to rotate synchronously, and the bran can be crushed by cooperating with the crushing tooth 2 9, and the crushed bran is sucked out of the powder through the suction or negative pressure equipment connected to the discharge port outside and transported to the subsequent steps; when the silencer cotton 10 needs to be replaced, the handle can be pulled upward to drive the arc block 27, and then the bracket 25 and the support plate 26 can be driven to move upward synchronously so that the support plate 26 drives the silencer cotton 10 above to move upward synchronously, and the silencer cotton 10 in the cavity of the side wall of the crushing box 1 can be extracted When the sound-absorbing cotton 10 on the outside of the feeding pipe 12 is replaced, the upper end of the U-shaped rod 19 can be pulled to drive the baffle 2 18 to move up and squeeze the spring 20, and the baffle 2 18 drives the baffle 1 17 to move synchronously until the lower end of the baffle 17 moves above the chain 16, and then the chain 16 is moved out of the opening to separate it from the sprocket 15, and then the shell 11 can be pulled in the relative outer direction to disassemble it, and then the sound-absorbing cotton 10 arranged on the outer wall of the feeding pipe 12 can be replaced. After the sound-absorbing cotton 10 is replaced, the front and rear covers of the two shells 11 are arranged on the outside of the feeding pipe 12 for assembly, and then the U-shaped rod 19 is pulled to move upward. The rod 19 moves the lower end of the baffle 17 to the top of the opening, pulls the chain 16 connected to the side of the shell 11 behind the feed pipe 12, and makes the chain 16 go around the shell 11 in front of the feed pipe 12, and then inserts the chain 16 into the opening. After the chain 16 is meshed with the sprocket 15, the force applied to the U-shaped rod 19 is released, so that the baffle 2 18 drives the U-shaped rod 19 to reset under the elastic force of the spring 20, and at the same time, the baffle 2 18 drives the baffle 17 to reset, so that the baffle 17 limits the chain 16, and then pulls the chain 16 through one end of the opening to tighten the chain 16, and at the same time tightens and fixes the shell 11 in front of the feed pipe 12. When the chain 16 is pulled, the chain 16 drives the sprocket 15 to bring The movable shaft 14 rotates, and the shaft 14 drives the ratchet 21 to rotate. The ratchet 21 will squeeze and push the block 23 to drive the rotating rod 22 to rotate in the direction opposite to the rotation direction of the ratchet 21. At the same time, the block 23 will twist the torsion spring 24. When the part of the ratchet 21 that squeezes and pushes the block 23 is misaligned with the block 23, the block 23 will reset under the torsion of the torsion spring 24 and re-engage with the ratchet 21. This is repeated continuously, so that the block 23 restricts the ratchet 21 to prevent it from reversing, loosening the chain 16 and affecting the connection and fixing effect of the two shells 11. After the chain 16 is pulled to a suitable length through one end of the opening, the assembly and fixing of the shell 11 can be completed, and the replacement of the silencer cotton 10 outside the feed pipe 12 is completed. It is easy to use and more practical.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pulverizer for conveniently replacing silencer cotton, comprising a pulverizing box (1), wherein a feed inlet and a discharge inlet are respectively arranged on both sides of the pulverizing box (1), and the discharge inlet is located above the feed inlet, a cavity is opened on the side wall of the pulverizing box (1), and the cavity passes through the top of the pulverizing box (1), and silencer cotton (10) is arranged in the cavity, an auxiliary motor (2) is arranged on the top of the pulverizing box (1), and the output end of the auxiliary motor (2) is connected to a rotating block (3) in the pulverizing box (1), and the rotating block (3) at the bottom of the pulverizing box (1) is connected to the rotating block (3) at the bottom. A rotating block 2 (4) is rotatably mounted on one side of the crushing box (1), a main motor (5) is arranged on one side, a belt pulley (6) is sleeved on the lower end of the connecting shaft of the rotating block 2 (4) outside the crushing box (1) and outside the output end of the main motor (5), and the two belt pulleys (6) are connected by a belt (7), the outer walls of the rotating block 1 (3) and the rotating block 2 (4) are each provided with a plurality of crushing teeth 1 (8), and the inner wall of the crushing box (1) is provided with a plurality of crushing teeth 2 (9) meshing with the crushing teeth 1 (8), and the characteristics are as follows: A feed pipe (12) connected to the feed port is provided on one side of the crushing box (1), a front-to-rear symmetrical shell (11) is provided on the outside of the feed pipe (12), a fixing mechanism is provided on the outside of the shell (11), a plurality of silencer cottons (10) are provided between the shell (11) and the feed pipe (12), a mounting mechanism is provided in the cavity of the side wall of the crushing box (1), the mounting mechanism comprises a bracket (25), and a plurality of brackets (25) are symmetrically arranged, the left and right brackets (25) are respectively provided with a feed pipe and a discharge pipe corresponding to the feed port and the discharge port, a support plate (26) is connected to the bottom end of the bracket (25), an arc block (27) connected to the bracket (25) is provided at the opening of the cavity, a magnetic strip (28) is embedded at the bottom of the arc block (27) on the inside and outside of the bracket (25), a handle is connected to the top of the arc block (27), and the silencer cotton (10) in the cavity is located on one side of the outer wall of the bracket (25).

2. The grinder for convenient replacement of silencer cotton according to claim 1, characterized in that: The fixing mechanism comprises a fixing block (13), and a plurality of fixing blocks (13) are provided. The fixing block (13) is fixedly installed on a side of the outer shell (11) located at the rear and away from the crushing box (1). A chamber 1 is provided in the lower part of the fixing block (13). A rotating shaft (14) is rotatably installed in the chamber 1. A sprocket (15) is sleeved on the outer wall of the rotating shaft (14). A chain (16) is meshed on one side of the sprocket (15), and one end of the chain (16) is connected to the other side of the outer shell (11) located at the rear of the feed pipe (12). An opening adapted to the chain (16) is provided on one side of the fixing block (13). A chamber 2 is provided on the upper part of the fixing block (13) above the chamber 1. A ratchet (21) is sleeved on the outer wall of the upper end of the rotating shaft (14) in the chamber 2. A rotating rod (22) is rotatably installed on one side of the bottom of the chamber 2, and the upper end of the rotating rod (22) is A handle is connected to the outside of the fixed block (13); a clamping block (23) and a torsion spring (24) are sleeved on the outer wall of the rotating rod (22); the clamping block (23) is meshed with the ratchet (21); two ends of the torsion spring (24) are respectively fixedly connected to the clamping block (23) and the inner wall of the second chamber; a chamber three is opened on one side of the second chamber in the fixed block (13); a baffle plate two (18) is arranged in the chamber three; a U-shaped The U-shaped rod (19) is fixedly connected to the second baffle plate (18) at its lower end, a spring (20) is sleeved on the outer side of the U-shaped rod (19) between the second baffle plate (18) and the inner top wall of the third chamber, the bottom of the second baffle plate (18) is connected to the first baffle plate (17), and the lower end of the first baffle plate (17) is inserted into a slot provided in the bottom of the opening, and the first baffle plate (17) is located on the side of the chain (16) away from the rotating shaft (14).

3. The grinder for convenient replacement of silencer cotton according to claim 2 is characterized in that: The plurality of brackets (25) are all arc-shaped structures of the same size, the cross section of the arc block (27) is an inverted convex shape, and the crushing box (1) is made of a metal material that is attracted to the magnetic strip (28).

4. The grinder for convenient replacement of silencer cotton according to claim 3 is characterized in that: The rotating shaft (14) and the rotating rod (22) are both rotatably connected to the fixed block (13) via bearings; the clamping block (23) is arc-shaped and fixedly connected to the rotating rod (22); the clamping block (23) is located on a side of the ratchet wheel (21) away from the crushing box (1).

5. The grinder for convenient replacement of silencer cotton according to claim 3 is characterized in that: The two ends of the spring (20) are fixedly connected to the second baffle (18) and the inner wall of the third chamber respectively, and a side surface of the first baffle (17) is in contact with the chain (16).

6. The grinder for convenient replacement of silencer cotton according to claim 3 is characterized in that: The outer shell (11) is formed by combining a semicircular structure with a cross section and an arc-shaped structure with a U-shaped cross section, and sealing strips are embedded and installed on the opposite wall surfaces of the two outer shells (11).

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