Sandstorm-resistant barrier type electric meter box

Abstract

The invention relates to the field of electric meter boxes, and discloses a wind-sand-resistant blocking type electric meter box which is provided with a box body, a sand collecting notch, a sand collecting circular cavity, a wind passing ring cavity, a wind driving piece, a blocking plate piece and an air blowing assembly, and the blocking plate piece is used for blocking sand grains about to enter the wind driving piece; the air blowing assembly blows air to the blocking plate in the direction parallel to the blocking plate, and the air driving piece can conduct forward driving or reverse driving, so that air outside the box body is sucked into the sand collecting round cavity during forward driving, then poured into the air passing ring cavity through the air driving piece and injected into the box body through the air passing channel; and during reverse driving, air in the box body is sucked into the air passing ring cavity through the air passing channel and then is injected into the sand collecting circular cavity through the air driving piece. According to the invention, an efficient gas-solid separation structure is formed by utilizing different airflow flowing directions in the sand collecting circular cavity and the air passing ring cavity, so that directional guide heat dissipation of airflow is realized, centralized treatment of sand grains is also realized, and bidirectional optimization of wind-sand-resistant protection and ventilation heat dissipation is realized.

Description

Technical Field

[0001] This invention relates to the field of meter box technology, and specifically to a wind and sand resistant barrier meter box. Background Technology

[0002] In outdoor power distribution networks, meter boxes, as core equipment for electricity metering and line protection, are widely used in various scenarios such as urban suburbs, rural areas, Gobi deserts, and mining areas. In areas prone to sandstorms (such as arid regions in Northwest China, wind-blown grasslands, and areas surrounding mines), meter boxes are constantly exposed to the erosion of strong sandstorms. Although the heat dissipation vents on outdoor meter boxes can meet basic ventilation and heat dissipation requirements, fine sand particles can still enter the box through these vents. These fine sand particles can then cover critical components inside the meter, such as metering elements, terminals, and circuit boards, causing problems such as poor contact, signal interference, and heat dissipation failure. This can lead to increased metering errors, short circuits, and equipment burnout, seriously affecting the accuracy of electricity metering and the stability of power supply.

[0003] To prevent fine sand particles from entering the housing, filters are usually installed at the heat dissipation vents. Over time, fine sand particles will clog the pores on the filter screen. After long-term accumulation of wind and sand, a dense sand layer will form on the surface of the filter screen, making it impossible to achieve ventilation and heat dissipation.

[0004] To improve resistance to wind and sand, some existing technologies reduce the intrusion of wind and sand by enhancing sealing performance, such as completely sealing the meter box. However, excessive sealing can prevent the heat inside the meter box from dissipating in time. Especially in high-temperature and windy areas, the heat generated during the operation of the meter is superimposed with the heat of the external environment, which can cause the temperature inside the box to rise sharply, accelerate the aging of electronic components, shorten the service life of the meter, and even cause safety hazards.

[0005] Therefore, existing outdoor meter boxes suffer from insufficient protection and difficulty in balancing sealing and ventilation / heat dissipation performance in windy and sandy environments. Summary of the Invention

[0006] Therefore, the present invention provides a wind and sand resistant barrier-type meter box, which effectively solves the technical problems of insufficient protection performance and difficulty in balancing sealing and ventilation heat dissipation performance in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a wind and sand resistant barrier-type meter box, comprising: Box; A sand collection trough is provided on the outer wall of the box body; A sand-collecting cavity is disposed inside the box and directly opposite the sand-collecting trough opening; An air passage cavity is provided outside the sand-gathering circular cavity. An air passage channel is connected to the air passage cavity and is connected to the inside of the box body through the air passage channel. A wind-driven component is disposed inside the housing and directly opposite the sand-gathering cavity and the air-passing ring cavity. The wind-driven component drives and forms opposite airflow directions within the sand-gathering cavity and the air-passing ring cavity. A barrier plate is installed between the sand-gathering cavity and the wind-driven component to block sand particles from entering the wind-driven component from the sand-gathering cavity. An air blowing assembly is installed inside the sand-gathering cavity and directly opposite the barrier plate. The air blowing assembly blows air onto the barrier plate in a direction parallel to the barrier plate to help the sand particles on the barrier plate detach from the barrier plate. The wind drive component is capable of forward or reverse driving. When driven in the forward direction, it draws air from outside the housing into the sand-gathering cavity, and then through the wind drive component, the air-passing ring cavity, and the air-passing channel before being injected into the housing. When driven in the reverse direction, it draws air from inside the housing into the air-passing ring cavity through the air-passing channel, and then through the wind drive component and the sand-gathering cavity before being discharged from outside the housing. When the wind drive is driven in the forward direction, sand particles follow the wind into the sand-gathering cavity and adhere to the barrier plate. Subsequently, the sand particles attached to the barrier plate can fall into the air passage cavity under the action of gravity and be blown out of the box under the action of the subsequent forward driving wind. Alternatively, when the wind drive is switched to reverse driving, the sand particles attached to the barrier plate are directly detached and blown out of the sand-gathering cavity by the reverse driving wind.

[0008] Furthermore, a first annular plate and a second annular plate are installed on the inner wall of the box, the second annular plate is disposed on the outer periphery of the first annular plate, the sand-gathering cavity is formed inside the first annular plate, and the air-passing annular cavity is formed between the first annular plate and the second annular plate. A partition plate is symmetrically arranged between the first annular plate and the second annular plate. The partition plate divides the air passage cavity into an upper cavity and a lower cavity that are symmetrical and not connected to each other. The upper cavity and the lower cavity are both directly opposite the wind drive component. The air passage is connected to the upper cavity, and the side opening of the upper cavity facing the inner wall of the box is closed by the inner wall of the box. The lower cavity is facing the sand collection trough and is connected to the outside of the box.

[0009] Furthermore, the wind drive component includes an inner annular frame facing the first annular plate, an outer annular frame disposed outside the inner annular frame, and a first rotating shaft seat installed inside the inner annular frame. A first mounting base is installed outside the first rotating shaft seat. A positive blade fan is installed in a circumferential array outside the first mounting base. A second rotating shaft seat is fixedly connected to the end of the first rotating shaft seat. A second mounting base is installed on the second rotating shaft seat. A connecting rod is connected to the outer wall of the second mounting base, and a mounting ring frame is connected through the connecting rod. The side of the mounting ring frame contacts the inner annular frame. A reverse blade fan is installed in a circumferential array outside the mounting ring frame. The reverse blade fan is located between the inner annular frame and the outer annular frame.

[0010] Furthermore, the inner wall of the box is provided with a mounting bracket, and the mounting bracket is provided with perforations for the air passage to pass through; A drive motor is mounted on the mounting bracket, and the drive end of the drive motor is connected to a drive shaft, which is connected to the first rotating shaft seat and the second rotating shaft seat.

[0011] Furthermore, a flow guide is installed on the side of the outer annular frame, the drive shaft passes through the flow guide, the flow guide is installed on the outer annular frame by bolts, a sealing cylinder is connected inside the flow guide, and the sealing cylinder is sleeved outside the second mounting base; During forward drive, the airflow drawn in from outside the housing passes through the positive blade fan and is then guided and turned by the deflector to enter the negative blade fan area. During reverse drive, the airflow drawn into the housing passes through the reverse blades and is then guided and turned by the deflector to enter the forward blade area.

[0012] Furthermore, the barrier plate includes an assembly ring connected to the end of the inner annular frame and a barrier plate body installed at the end of the assembly ring; The barrier plate has several first barrier holes located opposite the fan blade.

[0013] Furthermore, the air blowing assembly includes an air blowing hole disposed on the side wall of the first annular plate and an air blowing pipe installed on the air blowing hole; The end of the air blowing pipe is close to the barrier plate and parallel to the barrier plate. The first annular plate is provided with a first air blowing chamber and a second air blowing chamber. Both the first air blowing chamber and the second air blowing chamber are located in the upper cavity. The air blowing pipe is connected to the first air blowing chamber and the second air blowing chamber through the air blowing hole. The first air blowing chamber is arranged in a horizontal direction and has a first air passage opening that is directly opposite the reverse blade fan. The second air blowing chamber is arranged in a vertical direction and has a second air passage opening that is directly opposite the air passage.

[0014] Furthermore, a sliding hole is provided on the air passage, and a lifting valve plate is slidably installed in the sliding hole, with the bottom of the lifting valve plate extending out of the air passage; An eccentric wheel is coaxially mounted on the drive shaft, and the lifting valve plate abuts against the outer edge of the eccentric wheel; The eccentric wheel rotates with the drive shaft and pushes the lifting valve plate up or down through its outer edge, so that the lifting valve plate gradually blocks the air passage during the rising process and gradually opens the air passage during the falling process.

[0015] Furthermore, the second annular plate is provided with a through hole, the air passage is directly connected to the through hole, the through hole is directly opposite the upper cavity and communicates with the upper cavity; The bottom of the first annular plate is provided with a drop hole, which is directly opposite the lower cavity.

[0016] Furthermore, a blocking arc plate is connected between the partition plates, which is directly opposite the reverse blade fan blade. The blocking arc plate is provided with a plurality of second blocking holes, and the blocking arc plate is disposed in the lower cavity. The inner side of the barrier arc plate is connected to a sealing arc plate, and the inner edge of the sealing arc plate is connected to the outer edge of the barrier plate.

[0017] Compared with the prior art, the present invention has the following advantages: In this invention, the sand-gathering circular cavity and the air-passing ring cavity constitute a collaborative flow channel system, providing a space for airflow and sand separation. Under the forward drive of the wind-driven component, the differentiated airflow directions within the sand-gathering circular cavity and the air-passing ring cavity form a highly efficient gas-solid separation structure. This achieves both directional airflow guidance and heat dissipation, as well as concentrated treatment of sand particles, completely blocking the path of sand particles to enter the box through the corresponding channels. The clean airflow after separation and purification can smoothly enter the box, forming continuous ventilation. When the wind-driven component reverses its drive, it carries away the heat inside the box, achieving a two-way optimization of wind and sand protection and ventilation and heat dissipation. In the forward drive mode of the wind-driven component, the airflow outside the box is drawn into the sand-gathering cavity. When the airflow passes through the baffle plate, the sand particles adhere to the surface of the baffle plate due to inertial collision and interception. The clean airflow then enters the box through the wind-driven component and the air-passing ring cavity. When sand particles accumulate or become stuck on the surface of the baffle plate, the wind-driven component switches to reverse drive. The clean airflow inside the box is injected into the sand-gathering cavity in reverse through the air channel and the air-passing ring cavity, forming a reverse airflow impact force that thoroughly blows away the sand particles attached to the baffle plate. The flow channel can be restored without manual disassembly and cleaning. The bidirectional drive design not only avoids the heat dissipation failure problem caused by sand accumulation in traditional filters, but also enables the meter box to operate stably for a long time in harsh wind and sand environments. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a wind-resistant and sand-proof barrier-type meter box provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the box in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the sand collection trough and the sand accumulation cavity in an embodiment of the present invention; Figure 4 for Figure 3 A front view structural diagram; Figure 5 for Figure 3 A top-view structural diagram; Figure 6 for Figure 5 A planar sectional view along the AA direction; Figure 7 for Figure 5 A three-dimensional sectional view along the AA direction; Figure 8 for Figure 7 A magnified structural diagram of A in the middle; Figure 9 for Figure 8 A magnified structural diagram of B in the diagram; Figure 10 This is a schematic diagram of the structure of the first annular plate, the second annular plate, the barrier plate, the mounting bracket, etc. in an embodiment of the present invention.

[0020] The labels in the diagram represent the following: 1. Housing; 2. Sand collection trough; 3. Sand collection cavity; 4. Air passage annular cavity; 5. Wind drive component; 6. Barrier plate; 7. Air blowing assembly; 8. First annular plate; 9. Second annular plate; 10. Divider plate; 11. Upper cavity; 12. Lower cavity; 13. Mounting bracket; 14. Perforation; 15. Flow guide; 16. Bolt; 17. Sealing cylinder; 18. Sliding hole; 19. Lifting valve plate; 20. Eccentric wheel; 21. Through hole; 22. Drop hole; 23. Barrier arc plate; 24. Second barrier hole; 25. Sealing arc plate; 26. Air passage; 51. Inner annular frame; 52. Outer annular frame; 53. First rotating shaft seat; 54. First mounting seat; 55. Front-blade fan blade; 56. Second rotating shaft seat; 57. Second mounting seat; 58. Connecting rod; 59. Mounting ring frame; 510. Reverse-blade fan blade; 511. Drive motor; 512. Drive shaft; 61. Assembly ring; 62. Barrier plate; 63. First barrier hole; 71. Air blow hole; 72. Air blow pipe; 73. First air blow chamber; 74. Second air blow chamber; 75. First air outlet; 76. Second air outlet. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-7 As shown, the present invention provides a wind and sand resistant barrier-type meter box, which has a box body 1, a sand collection slot 2, a sand collection cavity 3, a wind passage ring cavity 4, a wind drive component 5, a barrier plate 6, and an air blowing component 7.

[0023] The sand collection trough 2, sand accumulation cavity 3, air passage ring cavity 4, wind drive component 5, barrier plate component 6, and air blowing component 7 can be regarded as a wind and sand resistance structure. Generally, a box 1 can be equipped with multiple wind and sand resistance structures. The specific location and number of wind and sand resistance structures depend on the situation.

[0024] The sand collection trough 2 is set on the outer wall of the box 1 to collect the wind and sand around the box 1; The sand-gathering cavity 3 is set inside the box body 1 and is directly opposite the sand-collecting trough 2. The wind-blown sand collected from the sand-collecting trough 2 enters the wind-resistant sand structure through the sand-gathering cavity 3 to facilitate the subsequent processing of sand particles.

[0025] The air passage cavity 4 is located outside the sand-gathering circular cavity 3. The air passage cavity 4 is connected to the air passage channel 26 and is connected to the inside of the box 1 through the air passage channel 26. The air passage cavity 4 and the sand-gathering circular cavity 3 are connected.

[0026] like Figure 6 As shown, the wind drive 5 is installed inside the housing 1 and is directly opposite the sand-gathering cavity 3 and the air-passing ring cavity 4. The wind drive 5 is driven to draw the sand outside the housing 1 into the sand-gathering cavity 3, and then blows the air into the air-passing ring cavity 4 through the wind drive 5, forming opposite airflow directions in the sand-gathering cavity 3 and the air-passing ring cavity 4.

[0027] The barrier plate 6 is installed between the sand-gathering cavity 3 and the wind-driven component 5, and blocks the sand particles in the sand-gathering cavity 3 from entering the wind-driven component 5, preventing the sand particles that have entered the sand-gathering cavity 3 with the wind from continuing to enter the wind-driven component 5.

[0028] The air blowing assembly 7 is installed inside the sand-gathering cavity 3 and is directly opposite the barrier plate 6. The air blowing assembly 7 blows air onto the barrier plate 6 in a direction parallel to the barrier plate 6 to help the sand particles on the barrier plate 6 detach from the barrier plate 6.

[0029] Among them, the wind drive component 5 can be driven in the forward direction or in the reverse direction. When driven in the forward direction, the wind outside the box 1 is drawn into the sand-gathering cavity 3 and then injected into the box 1 after passing through the wind drive component 5, the air-passing ring cavity 4, and the air-passing channel 26 in sequence. When driven in the reverse direction, the wind inside the box 1 is drawn into the air-passing ring cavity 4 through the air-passing channel 26 and then discharged outside the box 1 after passing through the wind drive component 5 and the sand-gathering cavity 3 in sequence. When the wind drive 5 is driven in the forward direction, the sand particles follow the wind into the sand-gathering cavity 3 and adhere to the baffle plate 6. Subsequently, the sand particles attached to the baffle plate 6 can fall into the air-passing ring cavity 4 under the action of gravity, and be blown out of the box 1 under the action of the subsequent forward driving wind. Alternatively, when the wind drive 5 is switched to reverse driving, the sand particles attached to the baffle plate 6 are directly detached and blown out of the sand-gathering cavity 3 by the action of the reverse driving wind.

[0030] When the wind drive 5 is driven in the forward direction, the air outside the housing 1 is drawn into the sand-gathering cavity 3. When passing through the baffle plate 62, the sand particles adhere to the baffle plate 62. The air continues to flow forward and enters the wind drive 5. Under the action of the wind drive 5, it enters the air-passing ring cavity 4, thus allowing the air to enter the housing 1. The air flow inside the housing 1 can help dissipate heat from the housing 1 and its internal structure. When the wind drive 5 is driven in the reverse direction, the air inside the housing 1 enters the air-passing ring cavity 4 through the air passage 26, and then is injected into the sand-gathering cavity 3 through the wind drive 5.

[0031] In practical applications, there are three commonly used methods for resisting wind and sand: The first is: to periodically perform the forward driving process of the wind-driven component 5; When the wind drive 5 is driven in the forward direction, the air outside the box 1 is drawn into the sand-gathering cavity 3. The sand particles enter the sand-gathering cavity 3 under the forward drive of the wind drive 5 and adhere to the baffle plate 62 when passing through it. The air continues to flow forward and enters the wind drive 5. Under the action of the wind drive 5, it enters the air-passing ring cavity 4, thus allowing the air to enter the box 1. The wind drive 5 is turned off every 5 to 20 minutes to stop its operation. At this time, the sand particles fall into the air-passing ring cavity 4 under their own gravity. Then the wind drive 5 is restarted. The direction of the air in the air-passing ring cavity 4 is outward. Under the action of this outward wind force, the accumulated sand particles are blown out of the box 1.

[0032] This method can effectively block wind and sand and help the internal structure of the enclosure 1 dissipate heat. To further complete the heat dissipation process, an air outlet needs to be set on the enclosure 1.

[0033] Secondly, the wind-driven component 5 is driven in both forward and reverse directions intermittently. First, the wind drive 5 is driven in the forward direction. When the wind drive 5 is driven in the forward direction, the air outside the box 1 is drawn into the sand-gathering cavity 3. The sand particles enter the sand-gathering cavity 3 under the forward drive of the wind drive 5 and adhere to the baffle plate 62 when passing through it. The air continues to flow forward and enters the wind drive 5. Under the action of the wind drive 5, it enters the air-passing ring cavity 4, thus allowing the air to enter the box 1. Every 5 to 20 minutes, the wind drive 5 is driven in the reverse direction. At this time, when the wind drive 5 is driven in the reverse direction, the air in the box 1 enters the air-passing ring cavity 4 through the air passage 26, and then is injected into the sand-gathering cavity 3 through the wind drive 5. The sand particles in the sand-gathering cavity 3 are blown out of the sand-gathering cavity 3 under the action of the outward wind force.

[0034] This method can effectively block wind and sand and help the internal structure of the box 1 dissipate heat. There is no need to set an air outlet on the box 1, which greatly reduces the situation of wind and sand entering the box 1.

[0035] Thirdly: the wind drive component 5 is driven in a phased manner, including forward, shutdown, and reverse driving processes. First, the wind drive 5 is driven in the forward direction. With the wind drive 5 in this forward direction, air from outside the housing 1 is drawn into the sand-gathering cavity 3. Sand particles enter the sand-gathering cavity 3 under the forward drive of the wind drive 5 and adhere to the baffle plate 62 as they pass through it. The air continues to flow forward into the wind drive 5 and, under its action, enters the air-passing ring cavity 4, thus allowing air to enter the housing 1. The wind drive 5 is then turned off approximately every 5-20 minutes, ceasing its operation. At this time, the sand particles fall into the air-passing ring cavity 4 under their own gravity, with some particles becoming stuck in the baffle plate. If the body 62 cannot fall under the action of gravity, wait for about 2 to 5 minutes and then drive the wind drive 5 in the reverse direction. At this time, when the wind drive 5 is driven in the reverse direction, the air in the box 1 enters the air passage 26 into the air passage annular cavity 4, and then is injected into the sand accumulation cavity 3 through the wind drive 5. The sand particles stuck on the baffle plate 62 are blown out of the sand accumulation cavity 3 under the action of the outward wind force. After another interval of about 2 to 5 minutes, drive the wind drive 5 in the forward direction again. The direction of the wind in the air passage annular cavity 4 is outward. Under the action of this outward wind force, the sand particles accumulated in the air passage annular cavity 4 are blown out of the box 1.

[0036] This method takes into account the excessive energy consumption caused by the continuous forward and reverse drive switching of the wind drive component 5, allowing the sand particles to fall freely under the action of gravity. This reduces the driving time and frequency of the wind drive component 5, thereby reducing energy consumption. In practical applications, the reverse drive can be started once after several forward drives and shutdowns.

[0037] In this invention, the sand-gathering circular cavity 3 and the air-passing ring cavity 4 provide a space for airflow. Under the forward drive of the wind drive component 5, the different airflow directions in the sand-gathering circular cavity 3 and the air-passing ring cavity 4 can not only achieve airflow heat dissipation, but also achieve centralized treatment of sand and dust. This can prevent sand particles from entering the box 1 and can also introduce air into the box 1 to achieve heat dissipation.

[0038] Considering the possibility of sand particles getting stuck on the baffle plate 62, the wind drive 5 is configured with two driving modes: forward drive and reverse drive. When the wind drive 5 is driven forward, the air outside the housing 1 is drawn into the sand-gathering cavity 3. As it passes through the baffle plate 62, the sand particles adhere to the baffle plate 62. The air continues to flow forward and enters the wind drive 5. Under the action of the wind drive 5, it enters the air-passing ring cavity 4, thus allowing the air to enter the housing 1. The airflow inside the housing 1 helps to dissipate heat from the housing 1 and its internal structure. When the wind drive 5 is driven in reverse, the air inside the housing 1 enters the air-passing ring cavity 4 through the air passage 26, and then is injected into the sand-gathering cavity 3 through the wind drive 5, helping the sand particles attached to the baffle plate 62 to be discharged from the sand-gathering cavity 3.

[0039] In this invention, such as Figure 7As shown, the sand-collecting cavity 3 and the air-passing annular cavity 4 are nested together. The sand-collecting cavity 3 allows the sand collected from the sand-collecting trough 2 to enter the wind-resistant structure for subsequent sand particle processing. The air-passing annular cavity 4 is connected to the interior of the housing 1 through the air-passing channel 26 to inject air into the interior of the housing 1. Specifically, as shown... Figure 6 As shown, a first annular plate 8 and a second annular plate 9 are installed on the inner wall of the box 1. The second annular plate 9 is disposed on the outer periphery of the first annular plate 8. The sand-gathering cavity 3 is formed inside the first annular plate 8. The air-passing annular cavity 4 is formed between the first annular plate 8 and the second annular plate 9.

[0040] like Figure 10 As shown, a partition plate 10 is symmetrically arranged between the first annular plate 8 and the second annular plate 9. The partition plate 10 divides the air passage cavity 4 into an upper cavity 11 and a lower cavity 12 that are symmetrical and not connected to each other. Both the upper cavity 11 and the lower cavity 12 are directly opposite the wind drive component 5.

[0041] The air passage 26 is connected to the upper cavity 11. The side opening of the upper cavity 11 facing the inner wall of the box 1 is closed by the inner wall of the box 1. The lower cavity 12 is facing the sand collection trough 2 and is connected to the outside of the box 1.

[0042] The air passage cavity 4 is divided into an upper cavity 11 and a lower cavity 12 that are symmetrical and not connected to each other. This is so that the upper cavity 11 and the lower cavity 12 can achieve their respective purposes. The upper cavity 11 and the lower cavity 12 are directly opposite the wind drive component 5. When the wind drive component 5 is driven in the forward direction, the wind will flow outward into the upper cavity 11 and the lower cavity 12. The wind flowing into the upper cavity 11 can enter the box 1 through the air passage 26. The wind flowing into the lower cavity 12 can blow the sand particles on the second annular plate 9 out, thus blocking the upper cavity 11 and the lower cavity 12. This can prevent the sand particles from entering the upper cavity 11 under the action of the wind and thus entering the box 1 through the air passage 26.

[0043] In the air passage annular cavity 4, the lower cavity 12 is directly opposite to and connected to the sand collection trough 2, while the upper cavity 11 is enclosed in the side wall of the box body 1 and is not directly opposite to the sand collection trough 2. Based on this, sand particles entering from the sand collection trough 2 with the wind generally enter the sand accumulation circular cavity 3 under the action of the positive driving wind force. At this time, the wind force in the sand accumulation circular cavity 3 is inward, while the wind force in the air passage annular cavity 4 is outward. Therefore, the wind force in both the upper cavity 11 and the lower cavity 12 is outward. Although the lower cavity 12 is directly opposite to the sand collection trough 2, due to the outward wind force, sand particles will basically not enter the lower cavity 12. They will only fall into the lower cavity 12 due to gravity when the wind stops.

[0044] In order to allow sand particles falling from the barrier plate 6 to pass through the first annular plate 8 and land on the second annular plate 9, a drop hole 22 is provided at the bottom of the first annular plate 8. The drop hole 22 is directly opposite the upper cavity 11. After the wind drive 5 is turned off, the sand particles pass through the drop hole 22 under the action of gravity and fall into the second annular plate 9.

[0045] In addition, in order to allow the air in the upper cavity 11 to enter the air passage 26, the present invention makes the following design, such as Figure 6 As shown, a through hole 21 is provided on the second annular plate 9, and an air passage 26 is connected to the through hole 21. The through hole 21 is directly opposite to the upper cavity 11 and communicates with the upper cavity 11.

[0046] In this invention, the wind-driven component 5 draws sand and dust from outside the housing 1 into the sand-gathering cavity 3, and then blows air into the air-passing annular cavity 4. Opposite airflow directions are formed in the sand-gathering cavity 3 and the air-passing annular cavity 4. The wind-driven component 5 can be driven in either the forward or reverse direction. In the forward direction, air from outside the housing 1 is drawn into the sand-gathering cavity 3 and sequentially passes through the wind-driven component 5, the air-passing annular cavity 4, and the air-passing channel 26 before being injected into the housing 1. In the reverse direction, air from inside the housing 1 is drawn into the air-passing annular cavity 4 through the air-passing channel 26 and sequentially passes through the wind-driven component 5 and the sand-gathering cavity 3 before being discharged outside the housing 1. Specifically, as shown... Figure 7 and Figure 8 As shown, the wind drive unit 5 includes an inner annular frame 51 facing the first annular plate 8, an outer annular frame 52 disposed outside the inner annular frame 51, and a first rotating shaft seat 53 installed inside the inner annular frame 51. A first mounting base 54 is installed on the outside of the first rotating shaft seat 53. A positive blade fan 55 is installed in a circumferential array on the outside of the first mounting base 54. A second rotating shaft seat 56 is fixedly connected to the end of the first rotating shaft seat 53. A second mounting base 57 is installed on the second rotating shaft seat 56. A connecting rod 58 is connected to the outer wall of the second mounting base 57, and a mounting ring frame 59 is connected through the connecting rod 58. The side of the mounting ring frame 59 contacts the inner annular frame 51. A reverse blade fan 510 is installed in a circumferential array on the outside of the mounting ring frame 59. The reverse blade fan 510 is located between the inner annular frame 51 and the outer annular frame 52.

[0047] The first rotating shaft seat 53 and the second rotating shaft seat 56 are connected and can rotate synchronously. Driven by the first mounting seat 54 and the second mounting seat 57, the positive blade fan 55 and the negative blade fan 510 rotate synchronously. Since the positive blade fan 55 and the negative blade fan 510 are set in different directions, when the first rotating shaft seat 53 and the second rotating shaft seat 56 rotate in the forward direction, the positive blade fan 55 can drive the wind outside the housing 1 to enter the sand-gathering cavity 3 inward, and the negative blade fan 510 can drive the wind outward to enter the air-passing ring cavity 4. When the first rotating shaft seat 53 and the second rotating shaft seat 56 rotate in the reverse direction, the positive blade fan 55 can drive the wind outward to enter the sand-gathering cavity 3 and discharge it outside the housing 1, and the negative blade fan 510 can drive the wind in the air-passing ring cavity 4 to enter the wind drive component 5 inward. Therefore, the switching of the forward drive and reverse drive of the wind drive component 5 only requires changing the rotation direction of the positive blade fan 55 and the negative blade fan 510.

[0048] To drive the first rotating shaft seat 53 and the second rotating shaft seat 56 to rotate synchronously, such as Figure 3 As shown, a mounting bracket 13 is provided on the inner wall of the housing 1. A drive motor 511 is mounted on the mounting bracket 13. The drive end of the drive motor 511 is connected to a drive shaft 512. The drive shaft 512 is connected to a first rotating shaft seat 53 and a second rotating shaft seat 56.

[0049] The drive motor 511 drives the first rotating shaft seat 53 and the second rotating shaft seat 56 to rotate via the drive shaft 512. The first rotating shaft seat 53 drives the positive blade fan 55 to rotate via the first mounting seat 54. The second rotating shaft seat 56 drives the negative blade fan 510 to rotate via the second mounting seat 57, the connecting rod 58, and the mounting ring frame 59.

[0050] By adjusting the forward or reverse rotation of the drive shaft 512, the rotation direction of the forward-rotating fan blade 55 and the reverse-rotating fan blade 510 can be adjusted, thereby adjusting the direction of airflow.

[0051] Among them, such as Figure 6 As shown, the air passage 26 passes through the mounting bracket 13, and the mounting bracket 13 is provided with a through hole 14 for the air passage 26 to pass through.

[0052] Wind can enter the sand-collecting cavity 3 from the sand-collecting cavity 3 and vice versa. The direction and transition of the wind are achieved through the wind-driven component 5. Specifically, as shown... Figure 6 and Figure 8 As shown, a flow guide 15 is installed on the side of the outer annular frame 52, and the drive shaft 512 passes through the flow guide 15. The flow guide 15 is installed on the outer annular frame 52 by bolts 16.

[0053] During forward drive, the airflow drawn in from outside the housing 1 passes through the forward blade 55 and is then guided and turned by the deflector 15 into the area of ​​the reverse blade 510. During reverse drive, the airflow drawn in from the housing 1 passes through the reverse blade 510 and is then guided and turned by the deflector 15 into the area of ​​the forward blade 55.

[0054] To prevent gas from escaping from the side of the shroud 15 near the drive shaft 512 and affecting the airflow effect, such as Figure 8 As shown, a sealing cylinder 17 is provided inside the flow guide shroud 15. The sealing cylinder 17 is sleeved outside the second mounting base 57, and the sealing cylinder 17 also has a certain flow guiding effect.

[0055] In this invention, the barrier plate 6 is installed between the sand-gathering cavity 3 and the wind-driven component 5, and blocks the sand particles in the sand-gathering cavity 3 that are about to enter the wind-driven component 5, preventing the sand particles that have entered the sand-gathering cavity 3 with the wind from continuing to enter the wind-driven component 5. Specifically, the barrier plate 6 includes an assembly ring 61 connected to the end of the inner annular frame 51 and a barrier plate body 62 installed at the end of the assembly ring 61. The barrier plate body 62 is provided with a plurality of first barrier holes 63 at the position opposite to the positive blade fan 55.

[0056] When the wind drive 5 is driven in the forward direction, the wind outside the housing 1 is drawn into the sand-gathering cavity 3. When passing through the barrier plate 62, the sand particles adhere to the barrier plate 62. The wind continues to flow forward through the first barrier hole 63 and enters the wind drive 5. The inner diameter of the first barrier hole 63 is smaller than the particle size of the sand particles, thereby achieving the blocking of the sand particles.

[0057] Because of the irregular shape of the sand grains, their outer surface may become stuck at the opening of the first blocking hole 63. To address this, the present invention can reverse the direction of the wind drive 5 to facilitate the sand's detachment from the first blocking hole 63. In addition, the air blowing assembly 7 blows air onto the blocking plate 6 in a direction parallel to the blocking plate 6 to assist the sand grains on the blocking plate 6 in detaching from it. Specifically, as shown... Figure 9 As shown, the air blowing assembly 7 includes an air blowing hole 71 disposed on the side wall of the first annular plate 8 and an air blowing pipe 72 installed on the air blowing hole 71. The end of the air blowing pipe 72 is close to the barrier plate 62 and parallel to the barrier plate 62. A first air-blowing chamber 73 and a second air-blowing chamber 74 are provided outside the first annular plate 8. Both the first air-blowing chamber 73 and the second air-blowing chamber 74 are located inside the upper cavity 11. The air-blowing pipe 72 is connected to the first air-blowing chamber 73 and the second air-blowing chamber 74 through the air-blowing hole 71. The first air-blowing chamber 73 is arranged in a horizontal direction and has a first air passage 75 facing the reverse blade fan 510. The second air-blowing chamber 74 is arranged in a vertical direction and has a second air passage 76 facing the air passage 26.

[0058] Whether the wind drive component 5 is driven in the forward or reverse direction, the air blowing assembly 7 blows air onto the surface of the barrier plate 62. When the wind drive 5 is driven in the forward direction, the wind outside the box 1 is drawn into the sand-gathering cavity 3. The sand particles enter the sand-gathering cavity 3 under the forward drive of the wind drive 5 and adhere to the barrier plate 62 when passing through the barrier plate 62. The wind continues to flow forward and enters the wind drive 5. Under the action of the wind drive 5, it enters the air passage cavity 4. Part of the wind enters the first air blowing chamber 73 through the first air passage 75 and is discharged from the air blowing pipe 72 through the air blowing hole 71. In this case, the gas discharged from the air blowing pipe 72 can blow the horizontally flowing sand from the vertical direction, causing the sand to change direction and produce a certain deviation, so that it does not flow forward in the horizontal direction. This can reduce the situation where sand particles get stuck in the first barrier hole 63 in the horizontal direction. When the wind drive 5 is reverse driven, the air in the housing 1 enters the air passage 26 into the air passage ring cavity 4. Part of the air in the air passage 26 enters the second air blowing chamber 74 through the second air passage 76 and is discharged from the air blowing pipe 72 through the air blowing hole 71, blowing air onto the sand particles in the vertical direction. At this time, the sand particles are subjected to the horizontal outward wind force and the vertical force, which helps the sand particles to break away from the barrier plate 62.

[0059] During the forward driving process of the wind drive component 5, when the wind enters the air passage cavity 4 under the action of the wind drive component 5, part of the wind enters the first air blowing chamber 73 through the first air passage 75 and is discharged from the air blowing pipe 72 through the air blowing hole 71. Since there is a certain airflow in the sand-gathering circular cavity 3, the generated air pressure can prevent this part of the wind from entering the air blowing hole 71 and the air blowing pipe 72, which may result in the gas not being able to form an air blowing effect at the end of the air blowing pipe 72. In this regard, the present invention makes the following design, as follows: Figure 4 and Figure 6 As shown, a sliding hole 18 is provided on the air passage 26, and a lifting valve plate 19 is slidably installed on the sliding hole 18. The bottom of the lifting valve plate 19 extends out of the air passage 26. An eccentric wheel 20 is coaxially mounted on the drive shaft 512, and the lifting valve plate 19 abuts against the outer edge of the eccentric wheel 20. The eccentric wheel 20 rotates with the drive shaft 512 and pushes the lifting valve plate 19 up or down through its outer edge, so that the lifting valve plate 19 gradually blocks the air passage 26 during the rising process and gradually opens the air passage 26 during the falling process.

[0060] During the rotation of the drive shaft 512, the eccentric wheel 20 will be driven to rotate. The eccentric wheel 20 has an outer edge that is farther away from the drive shaft 512 and an outer edge that is closer to the drive shaft 512. When the outer edge farther away from the drive shaft 512 contacts the lifting valve plate 19, the lifting valve plate 19 is in the highest position and completely blocks the air passage 26. When the outer edge closer to the drive shaft 512 contacts the lifting valve plate 19, the lifting valve plate 19 is in the lowest position. That is to say, during the rotation of the eccentric wheel 20, the lifting valve plate 19 repeatedly moves up and down under the squeezing action of the eccentric wheel 20 and its own gravity.

[0061] During the upward movement of the lifting valve plate 19, the cross-sectional area of ​​the air passage 26 decreases. During the downward movement of the lifting valve plate 19, the cross-sectional area of ​​the air passage 26 increases. Since the rotation speed of the positive blade fan 55 and the negative blade fan 510 is constant, the amount of air blown per unit time is constant. If the cross-sectional area of ​​the air passage 26 decreases, the air volume in the air passage 26 will be compressed, generating air pressure, which will cause the air to enter the air blowing hole 71 and the air blowing pipe 72, thus realizing the air blowing function.

[0062] Therefore, at least one air blow can be achieved within one cycle of rotation of the drive shaft 512.

[0063] The process of repeatedly raising and lowering the lifting valve plate 19 to achieve air blowing only applies to the process when the wind drive component 5 drives the air to flow into the box 1 in the forward direction. When the wind drive component 5 drives the air to flow out of the box 1 in the reverse direction, a certain amount of gas has accumulated inside the box 1 and is in a positive pressure state. Under the action of this positive pressure, the gas can quickly pass through the lifting valve plate 19, enter the second air blowing chamber 74 directly along the air passage 26 and be discharged from the air blowing pipe 72 to achieve the air blowing function.

[0064] During the reverse driving process of the wind drive component 5, sand particles on the second annular plate 9 may enter the wind drive component 5 under the action of the reverse blade fan 510. To avoid this situation, the present invention makes the following design, such as... Figure 8 As shown, the partition plates 10 are connected by a blocking arc plate 23 facing the reverse blade fan 510. The blocking arc plate 23 is provided with a number of second blocking holes 24. The blocking arc plate 23 is located in the lower cavity 12. The blocking arc plate 23 can block sand particles and prevent sand particles from entering the wind drive component 5 from the air passage cavity 4.

[0065] In addition, a sealing arc plate 25 is connected to the inner edge of the barrier arc plate 23. The inner edge of the sealing arc plate 25 is connected to the outer edge of the barrier plate body 62. The sealing arc plate 25 is arc-shaped, with one end connected to the partition plate 10 on one side and the other end connected to the partition plate 10 on the other side. The sealing arc plate 25 is directly opposite the lower cavity 12. The design of the sealing arc plate 25 can prevent sand particles from passing through the gap between the barrier arc plate 23 and the barrier plate body 62 and entering the wind drive component 5.

[0066] In summary, the main implementation process of this invention is as follows: Taking the anti-sand method of "intermittently driving, shutting down, and reversing the wind-driven component 5" as an example: The drive motor 511 drives the first rotating shaft seat 53 and the second rotating shaft seat 56 to rotate via the drive shaft 512. The first rotating shaft seat 53 drives the positive blade fan 55 to rotate in the forward direction via the first mounting seat 54. The second rotating shaft seat 56 drives the negative blade fan 510 to rotate in the reverse direction via the second mounting seat 57, the connecting rod 58, and the mounting ring frame 59. The wind drive component 5 is driven in the forward direction. When the wind drive component 5 is driven in the forward direction, the wind outside the box 1 is drawn into the sand-gathering cavity 3. The sand particles enter the sand-gathering cavity 3 under the forward drive of the wind drive component 5 and adhere to the baffle plate 62 when passing through the baffle plate 62. The wind continues to flow forward and passes through the positive blade fan 55. Under the guidance of the flow guide shroud 15, it flows in the reverse direction and enters the reverse blade fan 510. Then it flows outward into the air passage ring cavity 4. The wind enters the box 1 through the air passage 26. Turn off the wind drive 5 every 5 to 20 minutes to stop it from operating. At this time, under the action of the sand grains' own gravity, the sand grains fall into the air passage ring cavity 4 through the drop hole 22. Some sand grains are stuck on the barrier plate 62 and cannot fall under the action of gravity. Wait about 2 to 5 minutes for the wind drive component 5 to reverse drive. When the wind drive component 5 reverses drive, the air in the box 1 enters the air passage 26 into the air passage ring cavity 4, then passes through the reverse blade fan 510, flows in the reverse direction under the guidance of the guide shroud 15 and enters the positive blade fan 55, and then flows outward to the sand accumulation cavity 3. The sand particles stuck on the baffle plate 62 are blown out of the sand accumulation cavity 3 under the action of the outward wind. At the same time, some of the air in the air passage 26 enters the second air blowing chamber 74 through the second air passage 76 and is discharged from the air blowing pipe 72 through the air blowing hole 71, blowing air onto the sand particles in the vertical direction. The sand particles are simultaneously subjected to the horizontal outward wind force and the vertical force, which helps the sand particles to break away from the barrier plate 62. After an interval of about 2 to 5 minutes, the wind drive 5 is driven forward again. The sand particles that have fallen to the bottom of the air passage cavity 4 are blown out of the box 1 by the outward wind force of the reverse blade fan 510.

[0067] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A wind- and sand-resistant barrier-type meter box, characterized in that, have: Box (1); A sand collection trough (2) is provided on the outer wall of the box body (1); A sand-collecting cavity (3) is set inside the box (1) and directly opposite the sand-collecting trough (2); An air passage cavity (4) is provided outside the sand-gathering circular cavity (3). An air passage channel (26) is connected to the air passage cavity (4), and the air passage channel (26) is connected to the interior of the box body (1). A wind drive unit (5) is disposed inside the housing (1) and directly opposite the sand-gathering cavity (3) and the air-passing ring cavity (4). The wind drive unit (5) drives and forms opposite airflow directions in the sand-gathering cavity (3) and the air-passing ring cavity (4). The barrier plate (6) is installed between the sand-gathering cavity (3) and the wind-driven component (5) to block the sand particles in the sand-gathering cavity (3) from entering the wind-driven component (5). An air blowing assembly (7) is installed inside the sand-gathering cavity (3) and directly opposite the barrier plate (6). The air blowing assembly (7) blows air onto the barrier plate (6) in a direction parallel to the barrier plate (6) to help the sand particles on the barrier plate (6) detach from the barrier plate (6). The wind drive component (5) is capable of forward or reverse driving. When driven in the forward direction, it draws the air outside the box (1) into the sand-gathering cavity (3), and then through the wind drive component (5), the air-passing ring cavity (4), and the air-passing channel (26) before injecting it into the box (1). When driven in the reverse direction, it draws the air inside the box (1) into the air-passing ring cavity (4) through the air-passing channel (26), and then through the wind drive component (5) and the sand-gathering cavity (3) before discharging it outside the box (1). When the wind drive (5) is driven in the forward direction, the sand particles follow the wind into the sand-gathering cavity (3) and attach to the barrier plate (6); subsequently, the sand particles attached to the barrier plate (6) can fall into the air passage cavity (4) under the action of gravity, and be blown out of the box (1) under the action of the subsequent forward driving wind force, or, when the wind drive (5) is switched to reverse driving, the sand particles attached to the barrier plate (6) are directly detached by the reverse driving wind force and blown out of the sand-gathering cavity (3).

2. The wind-resistant and sand-proof barrier-type meter box according to claim 1, characterized in that, The inner wall of the box (1) is equipped with a first annular plate (8) and a second annular plate (9). The second annular plate (9) is disposed on the outer periphery of the first annular plate (8). The sand-gathering cavity (3) is formed inside the first annular plate (8). The air passage cavity (4) is formed between the first annular plate (8) and the second annular plate (9). A partition plate (10) is symmetrically arranged between the first annular plate (8) and the second annular plate (9). The partition plate (10) divides the air passage cavity (4) into an upper cavity (11) and a lower cavity (12) that are symmetrical and not connected to each other. The upper cavity (11) and the lower cavity (12) are both directly opposite the wind drive component (5). The air passage (26) is connected to the upper cavity (11). The side opening of the upper cavity (11) facing the inner wall of the box (1) is closed by the inner wall of the box (1). The lower cavity (12) is facing the sand collection trough (2) and is connected to the outside of the box (1).

3. The wind-resistant and sand-proof barrier-type meter box according to claim 2, characterized in that, The wind drive component (5) includes an inner annular frame (51) facing the first annular plate (8), an outer annular frame (52) disposed outside the inner annular frame (51), and a first rotating shaft seat (53) installed inside the inner annular frame (51). A first mounting seat (54) is installed on the outside of the first rotating shaft seat (53). A positive blade fan (55) is installed in a circular array on the outside of the first mounting seat (54). A second rotating shaft seat (56) is fixedly connected to the end of the first rotating shaft seat (53). A second mounting seat (57) is installed on the second rotating shaft seat (56). A connecting rod (58) is connected to the outer wall of the second mounting seat (57), and a mounting ring frame (59) is connected through the connecting rod (58). The side of the mounting ring frame (59) contacts the inner annular frame (51). A reverse blade fan (510) is installed in a circular array on the outside of the mounting ring frame (59). The reverse blade fan (510) is located between the inner annular frame (51) and the outer annular frame (52).

4. The wind-resistant and sand-proof barrier-type meter box according to claim 3, characterized in that, The inner wall of the box (1) is provided with a mounting bracket (13), and the mounting bracket (13) is provided with a through hole (14) for the air passage (26) to pass through. A drive motor (511) is mounted on the mounting bracket (13). The drive end of the drive motor (511) is connected to a drive shaft (512). The drive shaft (512) is connected to the first rotating shaft seat (53) and the second rotating shaft seat (56).

5. The wind-resistant and sand-proof barrier-type meter box according to claim 4, characterized in that, A flow guide (15) is installed on the side of the outer annular frame (52), and the drive shaft (512) passes through the flow guide (15). The flow guide (15) is installed on the outer annular frame (52) by bolts (16). A sealing cylinder (17) is connected inside the flow guide (15), and the sealing cylinder (17) is sleeved outside the second mounting base (57). During forward drive, the airflow drawn in from outside the housing (1) passes through the positive blade fan (55) and is then guided and turned by the deflector (15) into the area of ​​the reverse blade fan (510). During reverse drive, the airflow drawn in from the housing (1) passes through the reverse blade (510) and is then guided and turned by the deflector (15) into the area of ​​the forward blade (55).

6. The wind-resistant and sand-proof barrier-type meter box according to claim 5, characterized in that, The barrier plate (6) includes an assembly ring (61) connected to the end of the inner annular frame (51) and a barrier plate body (62) installed at the end of the assembly ring (61). The barrier plate (62) has a plurality of first barrier holes (63) located opposite the positive blade fan (55).

7. The wind-resistant and sand-proof barrier-type meter box according to claim 6, characterized in that, The air blowing assembly (7) includes an air blowing hole (71) disposed on the side wall of the first annular plate (8) and an air blowing pipe (72) installed on the air blowing hole (71). The end of the air blowing pipe (72) is close to the barrier plate (62) and parallel to the barrier plate (62). The first annular plate (8) is provided with a first air blowing chamber (73) and a second air blowing chamber (74). The first air blowing chamber (73) and the second air blowing chamber (74) are both located in the upper cavity (11). The air blowing pipe (72) is connected to the first air blowing chamber (73) and the second air blowing chamber (74) through the air blowing hole (71). The first air blowing chamber (73) and the second air blowing chamber (74) are connected. The first air blowing chamber (73) is arranged in the horizontal direction and has a first air passage (75) facing the reverse blade fan (510). The second air blowing chamber (74) is arranged in the vertical direction and has a second air passage (76) facing the air passage (26).

8. The wind-resistant and sand-proof barrier-type meter box according to claim 4, characterized in that, A sliding hole (18) is provided on the air passage (26), and a lifting valve plate (19) is slidably installed in the sliding hole (18). The bottom of the lifting valve plate (19) extends out of the air passage (26). An eccentric wheel (20) is coaxially mounted on the drive shaft (512), and the lifting valve plate (19) abuts against the outer edge of the eccentric wheel (20); The eccentric wheel (20) rotates with the drive shaft (512) and pushes the lifting valve plate (19) up or down through its outer edge, so that the lifting valve plate (19) gradually blocks the air passage (26) during the rising process and gradually opens the air passage (26) during the falling process.

9. The wind-resistant and sand-proof barrier-type meter box according to claim 2, characterized in that, The second annular plate (9) is provided with a through hole (21), the air passage (26) is connected to the through hole (21), the through hole (21) is opposite to the upper cavity (11) and communicates with the upper cavity (11); The bottom of the first annular plate (8) is provided with a drop hole (22), which is directly opposite the lower cavity (12).

10. The wind-resistant and sand-proof barrier-type meter box according to claim 6, characterized in that, The partition plates (10) are connected by a blocking arc plate (23) facing the reverse blade fan (510). The blocking arc plate (23) is provided with a plurality of second blocking holes (24). The blocking arc plate (23) is disposed in the lower cavity (12). The inner side of the barrier arc plate (23) is connected to a sealing arc plate (25), and the inner edge of the sealing arc plate (25) is connected to the outer edge of the barrier plate body (62).

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