A device for monitoring the internal temperature of a cellulose raw material storage tank

Abstract

The present invention provides a device for monitoring the internal temperature of a cellulose raw material storage tank, which relates to the technical field of temperature monitoring, and comprises: a storage tank body, wherein the interior of the storage tank body contains cellulose raw materials; a feed port is arranged on the top of the storage tank body, and a sealing cover body is fixedly installed on the top of the feed port; a transition cylinder is fixedly installed at the center of the bottom of the sealing cover body; a transmission ring is slidably installed inside the transition cylinder; and a transmission screw groove is provided on the circumferential inner wall of the transmission ring. Even after the temperature sensor is taken out from the fixed base, the temperature inside the storage tank body can be well maintained, thereby avoiding temperature loss caused by replacing the temperature sensor, ensuring that the quality of the cellulose raw material during the storage process is not affected by the replacement operation, thereby maintaining the preservation quality of the product, and solving the problem that the temperature loss caused by the reserved holes is likely to have an adverse effect on the preservation quality of the cellulose raw material.

Description

Technical Field

[0001] The invention relates to the technical field of temperature monitoring, and in particular to a device for monitoring the internal temperature of a cellulose raw material storage tank. Background Art

[0002] To ensure the storage quality of cellulose raw materials, cellulose raw materials need to be sealed during storage. Since cellulose raw materials are hygroscopic, the humidity of the storage environment must be strictly controlled to avoid agglomeration or deterioration caused by excessive moisture. It is recommended to use well-sealed containers for storage, and the internal temperature of the storage tank should be controlled at 12-25 degrees. In order to grasp the temperature conditions in the storage tank in real time and facilitate the staff to take timely control measures, a temperature monitoring device is needed to monitor the temperature inside the storage tank in real time.

[0003] The temperature detection device currently used in cellulose raw material storage tanks requires that the sensing end of the temperature sensor be directly inserted into the storage tank for monitoring during operation. However, when the sensor is maintained, disassembled or replaced, the reserved holes originally used to install the sensor become a potential source of temperature leakage. Since the storage environment of cellulose raw materials requires strict sealing and the internal temperature must be accurately maintained within the range of 12 to 25 degrees, the temperature loss problem caused by the reserved holes is likely to have an adverse effect on the preservation quality of the cellulose raw materials. Summary of the invention

[0004] The disclosed embodiment relates to a device for monitoring the internal temperature of a cellulose raw material storage tank, which comprises four sealing slide plates connected together to form a disc structure, and the disc structure is used to close the perforation B, so that after the temperature sensor is slidably inserted and removed from the fixed base, the temperature inside the storage tank will not leak outward.

[0005] In a first aspect of the present disclosure, a device for monitoring the internal temperature of a cellulose raw material storage tank is provided, specifically comprising: a storage tank body, wherein the interior of the storage tank body contains cellulose raw materials; a feed port is arranged on the top of the storage tank body, and a sealing cover body is fixedly installed on the top of the feed port; a transition cylinder is fixedly installed at a central position on the bottom of the sealing cover body; two restoration grooves are symmetrically arranged on the circumferential inner wall of the transition cylinder; a travel groove of an arc structure is also arranged on the circumferential inner wall of the transition cylinder; a transmission ring is slidably installed inside the transition cylinder; a transmission screw groove is arranged on the circumferential inner wall of the transmission ring; the transmission screw groove is a semi-helical structure; a stop vertical groove is also arranged on the circumferential inner wall of the transmission ring; the highest end of the stop vertical groove is aligned with The lowest ends of the transmission screw grooves are connected; an embedded plate is fixedly installed on the circumferential outer wall of the transmission ring; the embedded plate is also slidably installed inside the travel groove; a spring A is embedded between one side of the embedded plate and the tail end of the travel groove; a through hole A is provided at the center of the bottom of the transmission ring; a plurality of conversion grooves are arranged in a circular shape at the bottom of the transmission ring; the conversion groove is an arc structure; a sealing solid disk is fixedly installed at the inner bottom end of the transition cylinder; a through hole B is provided at the center of the bottom of the sealing solid disk; the through hole B is connected with the through hole A; a sealing slide is slidably installed inside the sealing solid disk; the sealing slide is a fan-shaped structure; when the four sealing slides are butt-jointed, they will form a disc structure together.

[0006] In at least some embodiments, a driven column is fixedly installed on the top of the sealing slide; the top of the driven column is also slidably connected to the conversion groove; a circular hole is opened on the outer wall of the sealing slide, and a spring B is embedded between the inside of the circular hole and the inside of the sealing fixed disk.

[0007] In at least some embodiments, a guide slide plate is slidably installed on the inner top end of the transition cylinder; a fixed base is fixedly installed inside the guide slide plate; a temperature sensor is arranged inside the fixed base; and a limit plug is fixedly installed on the outer wall of the temperature sensor.

[0008] In at least some embodiments, the limit plug is inserted into the interior of the fixed base; the circumferential outer wall of the limit plug is provided with limit grooves arranged in a circular shape; the left and right sides of the fixed base are provided with clamping grooves; a fixed plug plate is slidably installed inside the clamping groove; and the outer end of the fixed plug plate is an inclined structure.

[0009] In at least some embodiments, when the guide slide is at the highest end, the outer end of the fixed plug plate will be inserted into the interior of the recovery groove; baffles are fixedly installed on the front and rear sides of the fixed plug plate; a spring C is embedded between the inner side of the baffle and the inner wall of the clamping groove; and a connecting seat is fixedly installed on the rear side of the fixed base.

[0010] In at least some embodiments, a transmission push plate is fixedly installed on the bottom of the connecting seat; a transmission push column is fixed on the rear side of the transmission push plate; the rear end of the transmission push column is a hemispherical structure; the hemispherical structure of the transmission push column is also slidably connected to the transmission screw groove and the stop vertical groove.

[0011] In at least some embodiments, a control bolt is rotatably installed on the top rear side of the transition cylinder; the control bolt is connected to the connecting seat through threads; when the control bolt rotates, the control bolt will move downward with the connecting seat, the guide slide plate, the fixed base and the temperature sensor.

[0012] In at least some embodiments, when the fixed base moves downward, the inclined surface of the outer end of the fixed plug plate will be pushed by the inner wall of the transition tube and disengaged from the inside of the recovery groove; after the inclined surface of the outer end of the fixed plug plate is pushed by the inner wall of the transition tube, the inner end of the fixed plug plate will move inward and be inserted into the corresponding limit groove.

[0013] In at least some embodiments, when the connecting seat descends, the transmission push plate and the transmission push post will also descend; when the transmission push post moves downward, the transmission push post will use the semi-helical structure of the transmission screw groove to rotate the transmission ring and the conversion groove.

[0014] In at least some embodiments, when the conversion groove rotates, it will use its own arc structure to cooperate with the driven column to move the sealing slide outward; when the four sealing slides move outward, the four sealing slides will cancel the obstruction of the through hole B.

[0015] The present invention provides a device for monitoring the internal temperature of a cellulose raw material storage tank, which has the following beneficial effects:

[0016] 1. When preparing to activate this monitoring device, the operator needs to manually rotate the control bolt, which can indirectly move the inner end of the fixed plug plate inward and firmly insert it into the corresponding limit groove. This process ensures the accurate insertion and positioning of the temperature sensor during the descent process, providing a solid guarantee for its stability during normal use. At the same time, the control bolt can indirectly control the sealing slide plate to move outward to remove the obstruction of the perforation B, so that the monitoring device can open the sealing slide plate in advance before inserting the monitoring end of the temperature sensor into the storage tank body, effectively avoiding the interference of the sealing slide plate with the normal insertion process of the temperature sensor, and ensuring the smooth progress of the monitoring work.

[0017] 2. When the temperature sensor needs to be removed, the operator only needs to manually reversely rotate the control bolt to indirectly control the inner end of the fixed plug plate to smoothly disengage from the limit groove, cancel the limitation on the temperature sensor, and facilitate its removal. At the same time, the four sealing slides will re-dock to form a complete disc structure, effectively closing the perforation B. Through the closing effect of this disc structure, even after the temperature sensor is removed from the fixed base, the temperature inside the storage tank can be well maintained, avoiding the temperature loss problem caused by replacing the temperature sensor, ensuring that the quality of the cellulose raw material during storage is not affected by the replacement operation, thereby maintaining the preservation quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 The overall structure diagram of the present application is shown;

[0022] Figure 2 A schematic diagram of a half-section structure of a storage tank body and a sealing cover body of the present application is shown;

[0023] Figure 3 This application shows Figure 2 The enlarged structural diagram of part A in the middle;

[0024] Figure 4 A schematic diagram of a half-section structure of a sealing cover body and a transition tube of the present application is shown;

[0025] Figure 5 A schematic diagram of the structure of the transmission ring in the disassembled state of the present application is shown;

[0026] Figure 6 This application shows Figure 5 Schematic diagram of the bottom perspective structure;

[0027] Figure 7 A schematic diagram of the structure of the sealing slide plate of the present application in a disassembled state is shown;

[0028] Figure 8 This application shows Figure 7 A schematic diagram of the structure from a rear side perspective;

[0029] Reference numerals list

[0030] 1. Storage tank body; 2. Sealing cover body; 3. Transition cylinder; 4. Restoration groove; 5. Travel groove; 6. Transmission ring; 7. Transmission screw groove; 8. Stop vertical groove; 9. Mounting plate; 10. Spring A;

[0031] 11. Perforation A; 12. Conversion groove; 13. Sealing fixed plate; 14. Perforation B; 15. Sealing slide plate; 16. Follower column; 17. Spring B; 18. Guide slide plate; 19. Fixed base; 20. Temperature sensor;

[0032] 21. Limit plug; 22. Limit slot; 23. Clamping slot; 24. Fixed plug plate; 25. Baffle; 26. Spring C; 27. Connecting seat; 28. Transmission push plate; 29. ​​Transmission push column; 30. Control bolt. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Please refer to Figures 1 to 8 : Embodiment 1:

[0035] The present invention proposes a device for monitoring the internal temperature of a cellulose raw material storage tank, comprising: a storage tank body 1, wherein the storage tank body 1 contains cellulose raw materials; a feed port is arranged on the top of the storage tank body 1, and a sealing cover body 2 is fixedly installed on the top of the feed port; a transition barrel 3 is fixedly installed at the center of the bottom of the sealing cover body 2; two restoration grooves 4 are symmetrically arranged on the circumferential inner wall of the transition barrel 3; an arc-shaped stroke groove 5 is also arranged on the circumferential inner wall of the transition barrel 3; a transmission ring 6 is slidably installed inside the transition barrel 3; a transmission screw groove 7 is arranged on the circumferential inner wall of the transmission ring 6; the transmission screw groove 7 is a semi-helical structure; a stop vertical groove 8 is also arranged on the circumferential inner wall of the transmission ring 6; the highest end of the stop vertical groove 8 is connected to the lowest end of the transmission screw groove 7; an embedded plate 9 is fixedly installed on the circumferential outer wall of the transmission ring 6; the embedded plate 9 is also slidably installed inside the stroke groove 5; the embedded plate A spring A10 is embedded between one side of the plate 9 and the tail end of the stroke groove 5; a through hole A11 is provided at the center of the bottom of the transmission ring 6; a plurality of conversion grooves 12 are arranged in a circular shape at the bottom of the transmission ring 6; the conversion groove 12 is an arc-shaped structure; a sealing solid disk 13 is fixedly installed at the bottom end of the transition tube 3; a through hole B14 is provided at the center of the bottom of the sealing solid disk 13; the through hole B14 is connected with the through hole A11; a sealing slide plate 15 is slidably installed inside the sealing solid disk 13; the sealing slide plate 15 is a fan-shaped structure; when the four sealing slide plates 15 are connected, they will form a disc structure together; a driven column 16 is fixedly installed on the top of the sealing slide plate 15; the top of the driven column 16 is also slidably connected to the conversion groove 12; a circular hole is provided on the outer wall of the sealing slide plate 15, and a spring B17 is embedded between the inside of the circular hole and the inside of the sealing solid disk 13.

[0036] By manually rotating the control bolt 30, the connection seat 27, the fixed base 19, the guide slide plate 18 and the temperature sensor 20 are lowered by the rotation. During the descent, the inclined surface of the outer end of the fixed plug plate 24 will be pushed by the inner wall of the transition tube 3 and disengaged from the inside of the recovery groove 4. At the same time, the inner end of the fixed plug plate 24 will move inward and be inserted into the corresponding limit groove 22, so as to realize the insertion positioning of the temperature sensor 20 during the descent process, and ensure the stability of the temperature sensor 20 during normal use.

[0037] Embodiment 2, on the basis of embodiment 1, a guide slide plate 18 is slidably mounted on the top of the interior of the transition tube 3; a fixed base 19 is fixedly mounted inside the guide slide plate 18; a temperature sensor 20 is arranged inside the fixed base 19; a limit plug 21 is fixedly mounted on the outer wall of the temperature sensor 20; the limit plug 21 is inserted into the interior of the fixed base 19; a limit groove 22 is arranged in a circumferential shape on the circumferential outer wall of the limit plug 21; a clamping groove 23 is provided on the left and right sides of the fixed base 19; a fixed plug plate 24 is slidably mounted inside the clamping groove 23; the outer end of the fixed plug plate 24 is Inclined structure; when the guide slide plate 18 is at the highest end, the outer end of the fixed plug plate 24 will be inserted into the inside of the recovery groove 4; baffles 25 are fixedly installed on the front and rear sides of the fixed plug plate 24; a spring C26 is embedded between the inner side of the baffle 25 and the inner wall of the clamping groove 23; a connecting seat 27 is fixedly installed on the rear side of the fixed base 19; a transmission push plate 28 is fixedly installed on the bottom of the connecting seat 27; a transmission push column 29 is fixed on the rear side of the transmission push plate 28; the rear end of the transmission push column 29 is a hemispherical structure; the hemispherical structure of the transmission push column 29 is also slidably connected with the transmission screw groove 7 and the stop vertical groove 8.

[0038] When the connecting seat 27 descends, it will also bring down the transmission push plate 28 and the transmission push column 29, so that the transmission push column 29 uses the semi-helical structure of the transmission screw groove 7 to rotate the transmission ring 6 and the conversion groove 12. When the conversion groove 12 rotates, it will use its own arc structure to cooperate with the driven column 16 to move the sealing slide plate 15 outward to cancel the obstruction of the perforation B14, so that the monitoring device can open the sealing slide plate 15 in advance before inserting the monitoring end of the temperature sensor 20 into the storage tank body 1, so as to avoid the sealing slide plate 15 affecting the normal insertion of the temperature sensor 20 into the storage tank body 1.

[0039] Embodiment 3, on the basis of embodiment 2, a control bolt 30 is rotatably installed on the top rear side of the transition tube 3; the control bolt 30 is connected to the connecting seat 27 through a thread; when the control bolt 30 rotates, the control bolt 30 will move downward with the connecting seat 27, the guide slide plate 18, the fixed base 19 and the temperature sensor 20; when the fixed base 19 moves downward, the inclined surface of the outer end of the fixed plug plate 24 will be pushed by the inner wall of the transition tube 3 and detached from the inside of the recovery groove 4; after the inclined surface of the outer end of the fixed plug plate 24 is pushed by the inner wall of the transition tube 3, The inner end of the fixed plug plate 24 will move inward and be inserted into the corresponding limit groove 22; when the connecting seat 27 descends, it will also bring down the transmission push plate 28 and the transmission push column 29; when the transmission push column 29 moves downward, the transmission push column 29 will use the semi-helical structure of the transmission screw groove 7 to rotate the transmission ring 6 and the conversion groove 12; when the conversion groove 12 rotates, it will use its own arc structure to cooperate with the driven column 16 to move the sealing slide plate 15 outward; when the four sealing slide plates 15 move outward, the four sealing slide plates 15 will cancel the obstruction of the through hole B14.

[0040] By manually reversing the control bolt 30, it moves up with the connecting seat 27, the fixed base 19, the guide slide plate 18 and the temperature sensor 20. After moving to a certain position, the outer end of the fixed plug plate 24 will slide into the interior of the recovery groove 4, so that the inner end of the fixed plug plate 24 will be disengaged from the interior of the limit groove 22. At the same time, the transmission ring 6 and the sealing slide plate 15 will also be restored with the cooperation of the corresponding springs, so that the four sealing slide plates 15 are connected to form a disc structure, and the disc structure is used to achieve the closure of the perforation B14, so that after the temperature sensor 20 is slid out of the fixed base 19, the temperature inside the storage tank body 1 will not be lost to the outside.

[0041] The working principle of this embodiment:

[0042] When preparing to use the monitoring device, the bolt 30 is manually rotated to make it descend with the connection seat 27, the fixed base 19, the guide slide plate 18 and the temperature sensor 20. During the descent, the inclined surface of the outer end of the fixed plug plate 24 will be pushed by the inner wall of the transition tube 3 and detached from the inside of the recovery groove 4. At the same time, the inner end of the fixed plug plate 24 will move inward and be inserted into the corresponding limit groove 22, so as to realize the insertion and positioning of the temperature sensor 20 during the descent process, ensure the stability of the temperature sensor 20 during normal use, and the connection seat 2 When the drive push plate 28 and the drive push column 29 are lowered, the drive push column 29 uses the semi-helical structure of the drive screw groove 7 to rotate the drive ring 6 and the conversion groove 12, so that when the conversion groove 12 rotates, it uses its own arc structure to cooperate with the driven column 16 to move the sealing slide plate 15 outward to cancel the shielding of the perforation B14, so that the monitoring device opens the sealing slide plate 15 in advance before the monitoring end of the temperature sensor 20 is inserted into the storage tank body 1, so as to avoid the sealing slide plate 15 affecting the normal insertion of the temperature sensor 20 into the storage tank body 1;

[0043] When the temperature sensor 20 needs to be removed, the bolt 30 is manually reversed to move up with the connecting seat 27, the fixed base 19, the guide slide plate 18 and the temperature sensor 20. After moving to a certain position, the outer end of the fixed plug plate 24 will slide into the interior of the recovery groove 4, so that the inner end of the fixed plug plate 24 will be disengaged from the interior of the limit groove 22. At the same time, the transmission ring 6 and the sealing slide plate 15 will also be restored with the cooperation of the corresponding springs, so that the four sealing slide plates 15 are connected to form a disc structure, and the disc structure is used to achieve the closure of the perforation B14, so that after the temperature sensor 20 is slid out of the fixed base 19, the temperature inside the storage tank body 1 will not leak out.

[0044] In this article, there are a few points to note:

[0045] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0046] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0047] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A device for monitoring the internal temperature of a cellulose raw material storage tank, comprising: A storage tank body (1), wherein cellulose raw materials are contained in the storage tank body (1); a feed port is arranged on the top of the storage tank body (1), and a sealing cover body (2) is fixedly installed on the top of the feed port; a transition cylinder (3) is fixedly installed at the center of the bottom of the sealing cover body (2); the transition cylinder (3) is characterized in that two restoration grooves (4) are symmetrically arranged on the circumferential inner wall; the circumferential inner wall of the transition cylinder (3) is also provided with an arc-shaped stroke groove (5); a transmission ring (6) is slidably installed inside the transition cylinder (3); a transmission screw groove (7) is arranged on the circumferential inner wall of the transmission ring (6); the transmission screw groove (7) is a semi-helical structure; the circumferential inner wall of the transmission ring (6) is also provided with a stop vertical groove (8); The highest end of the stop vertical groove (8) is connected to the lowest end of the transmission screw groove (7); an embedded plate (9) is fixedly mounted on the circumferential outer wall of the transmission ring (6); the embedded plate (9) is also slidably mounted inside the travel groove (5); a spring A (10) is embedded between one side of the embedded plate (9) and the rear end of the travel groove (5); a through hole A (11) is provided at the center of the bottom of the transmission ring (6); the bottom of the transmission ring (6) is also provided with a plurality of conversion springs arranged in a circumferential shape. The transition tube (3) is provided with a sealing plate (13) fixedly mounted on the bottom end thereof; a through hole B (14) is provided at the center of the bottom of the sealing plate (13); the through hole B (14) is connected to the through hole A (11); a sealing slide plate (15) is slidably mounted on the inside of the sealing plate (13); the sealing slide plate (15) is in a fan-shaped structure; when four sealing slide plates (15) are connected to each other, they will form a disc structure; A guide slide plate (18) is slidably mounted on the top of the interior of the transition tube (3); a fixed base (19) is fixedly mounted inside the guide slide plate (18); a temperature sensor (20) is arranged inside the fixed base (19); a limit plug (21) is fixedly mounted on the outer wall of the temperature sensor (20); the limit plug (21) is inserted into the interior of the fixed base (19); limit grooves (22) are arranged in a circumferential shape on the circumferential outer wall of the limit plug (21); clamping grooves (23) are formed on the left and right sides of the fixed base (19); a fixed plug plate (24) is slidably mounted inside the clamping groove (23); the outer end of the fixed plug plate (24) is in an inclined structure; When the guide slide plate (18) is at the highest end, the outer end of the fixed plug plate (24) is inserted into the interior of the restoration groove (4); baffles (25) are fixedly installed on the front and rear sides of the fixed plug plate (24); a spring C (26) is embedded between the inner side of the baffle plate (25) and the inner wall of the clamping groove (23); a connecting seat (27) is fixedly installed on the rear side of the fixed base (19); a transmission push plate (28) is fixedly installed on the bottom of the connecting seat (27); a transmission push column (29) is fixed on the rear side of the transmission push plate (28); the rear end of the transmission push column (29) is a hemispherical structure; the hemispherical structure of the transmission push column (29) is also slidably connected to the transmission screw groove (7) and the stop vertical groove (8).

2. A device for monitoring the internal temperature of a cellulose raw material storage tank according to claim 1, characterized in that: A driven column (16) is fixedly mounted on the top of the sealing slide plate (15); the top end of the driven column (16) is also slidably connected to the conversion groove (12); a circular hole is formed on the outer wall of the sealing slide plate (15), and a spring B (17) is embedded between the inside of the circular hole and the inside of the sealing fixed plate (13).

3. The device for monitoring the internal temperature of a cellulose raw material storage tank according to claim 2, characterized in that: A control bolt (30) is rotatably mounted on the rear side of the top of the transition tube (3); the control bolt (30) is connected to the connecting seat (27) via threads; when the control bolt (30) rotates, the control bolt (30) moves downward with the connecting seat (27), the guide slide plate (18), the fixed base (19) and the temperature sensor (20).

4. The device for monitoring the internal temperature of a cellulose raw material storage tank according to claim 3, characterized in that: When the fixed base (19) moves downward, the inclined surface of the outer end of the fixed plug plate (24) will be pushed by the inner wall of the transition tube (3) and will be separated from the inside of the restoration groove (4); after the inclined surface of the outer end of the fixed plug plate (24) is pushed by the inner wall of the transition tube (3), the inner end of the fixed plug plate (24) will move inward and be inserted into the corresponding limit groove (22).

5. The device for monitoring the internal temperature of a cellulose raw material storage tank according to claim 4, characterized in that: When the connecting seat (27) descends, it also brings the transmission push plate (28) and the transmission push column (29) down; when the transmission push column (29) moves downward, the transmission push column (29) uses the semi-helical structure of the transmission screw groove (7) to drive the transmission ring (6) and the conversion groove (12) to rotate.

6. The device for monitoring the internal temperature of a cellulose raw material storage tank according to claim 5, characterized in that: When the conversion groove (12) rotates, it will use its own arc-shaped structure to cooperate with the driven column (16) to move the sealing slide plate (15) outward; when the four sealing slide plates (15) move outward, the four sealing slide plates (15) will remove the shielding of the through hole B (14).

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