Water flow adjusting device in pumped storage power station vertical shaft

Abstract

The utility model relates to the technical field of hydropower station water flow adjustment, in particular to a water flow adjusting device in a pumped storage power station vertical shaft. The water flow adjusting device in the pumped storage power station vertical shaft comprises a middle pipe, and a first connecting pipe and a second connecting pipe are symmetrically inserted in the middle of the middle pipe; the valve seat assembly is installed at one end of the middle pipe and comprises a first sealing cover, the first sealing cover is installed at one end of the middle pipe through a screw, a connecting rod is fixedly installed at the end, facing the middle pipe, of the first sealing cover, a sealing seat cylinder is fixedly installed at the end, away from the first sealing cover, of the connecting rod, and a first flow guide hole is formed in the sealing seat cylinder; the second sealing cover is installed at the other end of the middle pipe, and a valve element assembly used for adjusting the opening degree of the first flow guide hole is installed on the second sealing cover. The water flow adjusting device in the pumped storage power station vertical shaft has the advantages of being convenient to adjust and wide in adjusting range.

Description

Technical Field

[0001] The utility model relates to the technical field of water flow regulation in a hydropower station, in particular to a water flow regulating device in a vertical shaft of a pumped storage power station. Background Art

[0002] A pumped storage power station, also known as a storage hydropower station, is a hydropower station that can pump water to an upper reservoir for energy storage. A pumped storage power station uses electricity during low load periods to pump water to an upper reservoir, and then releases water to a lower reservoir for power generation during peak load periods. It can convert excess electricity during low load periods into high-value electricity during peak load periods. It is also suitable for frequency and phase modulation, stabilizing the frequency and voltage of the power system, and is suitable for emergency standby. It can also improve the efficiency of thermal power plants and nuclear power plants in the system. Pumped storage power stations have a large capacity increase and a high development rate.

[0003] Among them, in the process of pumped storage, it is necessary to pump water from a low place to a high place using a vertical shaft to achieve energy storage. When the existing vertical shaft water flow is transported, the water flow in the pipeline is not convenient to adjust. The water flow is mostly adjusted by adjusting the power of a single delivery pump, and the adjustment range is small.

[0004] Therefore, it is necessary to provide a new water flow regulating device in the shaft of a pumped storage power station to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a water flow regulating device in a vertical shaft of a pumped storage power station which is convenient to adjust and has a wide adjustment range.

[0006] The water flow regulating device in the vertical shaft of a pumped storage power station provided by the utility model comprises: an intermediate pipe, a connecting pipe 1 and a connecting pipe 2 are symmetrically inserted in the middle of the intermediate pipe, a conduit 1 and a conduit 2 are respectively inserted on one side of the intermediate pipe located at the connecting pipe 1, and a conduit 3 and a conduit 4 are respectively inserted on one side of the intermediate pipe located at the connecting pipe 2;

[0007] A valve seat assembly is installed at one end of the intermediate tube, and the valve seat assembly includes a sealing cover 1, the sealing cover 1 is installed at one end of the intermediate tube by screws, and a connecting rod is fixedly installed at one end of the sealing cover 1 facing the intermediate tube, and a sealing seat cylinder is fixedly installed at one end of the connecting rod away from the sealing cover 1, and the sealing seat cylinder is provided with a guide hole 1;

[0008] A second sealing cover is installed on the other end of the intermediate tube, and a valve core assembly for adjusting the opening of a guide hole is installed on the second sealing cover. The valve core assembly includes a plug rod, and two plug rods are provided. The two plug rods are symmetrically installed on the second sealing cover. A sealing end plate is installed at one end of the two plug rods extending into the intermediate tube. The sealing end plate is slidably matched with the intermediate tube, and a transmission shaft is rotatably installed on the sealing end plate through a sealing bearing. A sealing core barrel is fixedly installed on one end of the transmission shaft. The outer side wall of the sealing core barrel is slidably matched with the inner side wall of the sealing seat barrel. A waterproof cover is fixedly installed on the end of the sealing end plate away from the sealing core barrel. A driving motor is installed in the waterproof cover. The driving motor is coaxially and fixedly connected with the transmission shaft. An adjusting member for driving the sealing end plate to slide in the intermediate tube is installed on the intermediate tube.

[0009] Preferably, two flow guide holes are symmetrically provided on the sealing core tube.

[0010] Preferably, control valve one and control valve two are installed at the bottom ends of conduit three and conduit four, respectively.

[0011] Preferably, the regulating member comprises a water pump, the liquid inlet end of the water pump is connected to the connecting pipe 1 through a water pipe, the liquid outlet end of the water pump is connected to a drain pipe, the drain pipe is connected to a conducting elbow, the two ends of the conducting elbow are respectively connected to the conduit 1 and the conduit 2, and the conducting elbow is respectively embedded with a control valve 3 and a control valve 4 on both sides of the drain pipe.

[0012] Preferably, the conduit one and the conduit two are respectively arranged on both sides of the sealing end plate.

[0013] Preferably, the conduit three and the conduit four are respectively arranged on both sides of the sealing end plate.

[0014] Preferably, an opening scale is fixedly mounted on the second sealing cover, an indicator plate is fixedly mounted on the two insertion rods, and a sliding groove is provided on the indicator plate for sliding cooperation with the opening scale.

[0015] Preferably, the second bottom end of the connecting pipe is connected to a first flange by bolts, a first round tube is arranged at the lower part of the first flange, a filter box assembly is arranged at the bottom end of the first round tube, a filter screen is detachably fixed inside the filter box assembly by a fixing block, a second flange is arranged at the bottom of the filter box assembly, the second flange is connected to a third flange by bolts, a second sealing ring is arranged between the second flange and the third flange, cleaning pipes are arranged on both sides of the filter box assembly, one side of the cleaning pipe is connected to a sealing circular plate by bolts, and a first sealing ring is arranged between the cleaning pipe and the sealing circular plate.

[0016] Compared with the related art, the water flow regulating device in the vertical shaft of the pumped storage power station provided by the utility model has the following beneficial effects:

[0017] 1. The present utility model provides a water flow regulating device in a vertical shaft of a pumped storage power station. By arranging a valve seat assembly and a valve core assembly in an intermediate pipe, and utilizing the cooperation of a regulating member, a water pump, a drain pipe, a conduction elbow, a control valve three, and a control valve four, the water flow opening can be easily adjusted, and the opening adjustment range is very wide.

[0018] 2. By arranging an opening scale and an indicating board, the opening of the water flow can be directly read, which is convenient for adjustment and observation.

[0019] 3. By arranging a filter box assembly to filter the passing water flow, preventing impurities in the water body from clogging or damaging the components in the water flow regulating area when passing through the pipeline. By arranging a sealing plate, it is convenient to clean the impurities separated by the filter screen. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a preferred embodiment of the water flow regulating device in a vertical shaft of a pumped storage power station provided by the present utility model;

[0021] Figure 2 It is a schematic axial sectional structure diagram of the water flow regulating device in a vertical shaft of a pumped storage power station provided by the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the valve seat assembly and the valve core assembly provided by the present utility model;

[0023] Figure 4 It is a schematic sectional structure diagram of the water flow regulating device in a vertical shaft of a pumped storage power station provided by the present utility model.

[0024] Figure 5 It is a schematic structural diagram of the overall filter box assembly provided by the present utility model;

[0025] Figure 6 It is a schematic main structure diagram of the filter box assembly provided by the present utility model;

[0026] Figure 7 It is a schematic internal sectional structure diagram of the filter box assembly provided by the present utility model;

[0027] Reference numerals in the figure: 1, intermediate pipe; 11, connecting pipe 1; 12, connecting pipe 2; 13, conduit 1; 14, conduit 2; 15, conduit 3; 151, control valve 1; 16, conduit 4; 161, control valve 2; 2, valve seat assembly; 21, sealing cover 1; 22, connecting rod; 23, sealing seat cylinder; 201, flow guiding hole 1; 3, sealing cover 2; 4, valve core assembly; 41, inserting rod; 42, sealing end plate; 43, transmission shaft; 44, sealing core cylinder; 45, waterproof cover; 46, driving motor; 401, flow guiding hole 2; 5, adjusting part; 51, water pump; 52, drain pipe; 53, conduction elbow; 54, control valve 3; 55, control valve 4; 6, opening scale; 7, indicating plate; 701, sliding groove; 81, first flange; 82, first round pipe; 83, filter box assembly; 84, cleaning pipe; 85, sealing round plate; 86, second flange; 87, third flange; 88, fourth flange; 89, second round pipe; 90, first sealing ring; 91, second sealing ring; 92, fixing block; 93, filter net. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] The following describes in detail the specific implementation of the present utility model with reference to specific embodiments.

[0030] Embodiment 1

[0031] Please refer to Figures 1 to 7 , a water flow regulating device in a shaft of a pumped storage power station provided by an embodiment of the present utility model, the water flow regulating device in the shaft of the pumped storage power station includes:

[0032] Intermediate pipe 1, connecting pipe 11 and connecting pipe 12 are symmetrically inserted in the middle of intermediate pipe 1. On one side of connecting pipe 11 on intermediate pipe 1, conduit 13 and conduit 14 are respectively inserted. On one side of connecting pipe 12 on intermediate pipe 1, conduit 15 and conduit 16 are respectively inserted;

[0033] Valve seat assembly 2, installed at one end of intermediate pipe 1, and valve seat assembly 2 includes sealing cover 21. Sealing cover 21 is installed at one end of intermediate pipe 1 by screws, and a connecting rod 22 is fixedly installed at one end of sealing cover 21 facing intermediate pipe 1. At the end of connecting rod 22 away from sealing cover 21, a sealing seat cylinder 23 is fixedly installed, and a flow guiding hole 201 is opened in sealing seat cylinder 23;

[0034] A sealing cover 23 is installed on the other end of the intermediate tube 1, and a valve core assembly 4 for adjusting the opening of the guide hole 201 is installed on the sealing cover 23. The valve core assembly 4 includes a plug rod 41. Two plug rods 41 are provided. The two plug rods 41 are symmetrically installed on the sealing cover 23. A sealing end plate 42 is installed at one end of the two plug rods 41 extending into the intermediate tube 1. The sealing end plate 42 is slidably matched with the intermediate tube 1, and a transmission shaft 43 is rotatably installed on the sealing end plate 42 through a sealing bearing. A sealing core barrel 44 is fixedly installed on one end of the transmission shaft 43. The outer wall of the sealing core barrel 44 is slidably matched with the inner wall of the sealing seat barrel 23. A waterproof cover 45 is fixedly installed on the end of the sealing end plate 42 away from the sealing core barrel 44. A driving motor 46 is installed in the waterproof cover 45. The driving motor 46 is coaxially fixedly connected with the transmission shaft 43. An adjusting member 5 for driving the sealing end plate 42 to slide in the intermediate tube 1 is installed on the intermediate tube 1.

[0035] The sealing core tube 44 is symmetrically provided with a second flow guide hole 401 .

[0036] It should be noted that: when in use, the intermediate tube 1 is connected to the water supply pipeline in the vertical shaft by connecting tube 11, and then the intermediate tube 1 is connected to the delivery pump by connecting tube 2 12. Then, when the delivery pump starts to pump water and needs to adjust the delivery water flow, the sealing end plate 42 can be adjusted to slide in the intermediate tube 1 through the adjusting member 5, thereby driving the sealing core tube 44 to move synchronously in the sealing seat tube 23, thereby adjusting the opening of the guide hole 1 201, thereby realizing water flow regulation. Furthermore, the driving motor 46 can be started to drive the transmission shaft 43 to rotate, thereby driving the sealing core tube 44 to rotate, so that when the sealing core tube 44 rotates, the guide hole 2 401 is driven to dock with the guide hole 1 201, thereby further adjusting the water flow.

[0037] It should also be noted that: here the inner wall of the sealing seat cylinder 23 and the intermediate tube 1 is sealed by installing a sealing ring on the outside, and the inner wall of the sealing seat cylinder 23 is installed with a sealing ring that contacts and seals with the outer wall of the sealing core cylinder 44 to achieve plug-in sealing, thereby achieving adjustment of the opening of the guide hole 201.

[0038] In the embodiments of the present invention, please refer to Figure 1 and Figure 2 The regulating member 5 comprises a water pump 51, the liquid inlet end of the water pump 51 is connected to the connecting pipe 1 11 through a water pipe, the liquid outlet end of the water pump 51 is connected to a drain pipe 52, the drain pipe 52 is connected to a conducting elbow 53, the two ends of the conducting elbow 53 are respectively connected to the conduit 1 13 and the conduit 2 14, and the conducting elbow 53 is respectively embedded with a control valve 3 54 and a control valve 4 55 on both sides of the drain pipe 52;

[0039] Among them, the conduit one 13 and the conduit two 14 are respectively arranged on both sides of the sealing end plate 42, and the conduit three 15 and the conduit four 16 are respectively arranged on both sides of the sealing end plate 42.

[0040] It should be noted that when the adjusting member 5 adjusts the movement of the sealing end plate 42 in the middle pipe 1, when a larger opening degree needs to be adjusted, the second control valve 161 and the fourth control valve 55 are opened, and then the water pump 51 is started to pump the water body into the inner cavity of the middle pipe 1 on one side of the sealing end plate 42. Then, the water pressure is used to push the sealing end plate 42 to drive the sealing core cylinder 44 out of the sealing seat cylinder 23, so as to adjust the opening degree of the first diversion hole 201. When a smaller opening degree needs to be adjusted, the first control valve 151 and the third control valve 54 are opened, and then the water body is pumped into the inner cavity of the middle pipe 1 on the other side of the sealing end plate 42, so as to push the sealing end plate 42 to drive the sealing core cylinder 44 to insert into the sealing seat cylinder 23, so as to reduce the opening degree of the first diversion hole 201. During adjustment, when pumping water into one side inner cavity, the other side inner cavity drains water synchronously to achieve the balance of the pressurized water body.

[0041] In the embodiment of the present utility model, please refer to Figure 1 、 Figure 3 and Figure 4 , a opening degree scale 6 is fixedly installed on the second sealing cover 3, an indicating plate 7 is fixedly installed on the two inserting rods 41 together, and a sliding groove 701 which is slidably matched with the opening degree scale 6 is formed on the indicating plate 7;

[0042] It should be noted that when the sealing end plate 42 slides and adjusts, it synchronously drives the inserting rod 41 to slide in the second sealing cover 3, so that the inserting rod 41 drives the indicating plate 7 to move along the opening degree scale 6, so as to directly read out the opening degree of the water flow through the opening degree scale 6.

[0043] Embodiment 2

[0044] A water flow regulating device in a vertical shaft of a pumped storage power station. The present embodiment makes the following improvements compared with Embodiment 1, as Figures 5 to 7 shown: The bottom end of the second connecting pipe 12 is bolted to a first flange 81. A first round pipe 82 is arranged below the first flange 81. A filter box assembly 83 is arranged at the bottom end of the first round pipe 82. A filter net 93 is detachably fixed inside the filter box assembly 83 through a fixing block 92. A second flange 86 is arranged at the bottom of the filter box assembly 83. The second flange 86 is bolted to a third flange 87. A second sealing ring 91 is arranged between the second flange 86 and the third flange 87. Cleaning pipes 84 are arranged on both sides of the filter box assembly 83. One side of each cleaning pipe 84 is bolted to a sealing round plate 85. A first sealing ring 90 is arranged between the cleaning pipe 84 and the sealing round plate 85.

[0045] It should be noted that: the bottom end of the second connecting pipe 12 is connected with a first flange 81 to realize the connection between the first flange 81 and the second connecting pipe 12. A first circular pipe 82 is arranged below the first flange 81 for connecting the filter box assembly 83. The filter box assembly 83 is arranged at the bottom end of the first circular pipe 82 for installing the filter screen 93. The filter screen 93 is detachably fixed inside the filter box assembly 83 through a fixing block 92 for filtering the flowing water to prevent impurities in the water from blocking or damaging the components in the water flow regulation area. A second flange 86 is arranged at the bottom of the filter box assembly 83 for connecting the third flange 87. A second sealing ring 91 is arranged between the second flange 86 and the third flange 87 to improve the connection tightness. Cleaning pipes 84 are arranged on both sides of the filter box assembly 83 to facilitate the cleaning of the impurities filtered out in the filter box assembly 83 by personnel. One side of the cleaning pipe 84 is connected with a sealing circular plate 85. When cleaning is not required, the cleaning pipe 84 is closed by the sealing circular plate 85. A first sealing ring 90 is arranged between the cleaning pipe 84 and the sealing circular plate 85 to improve the connection tightness.

[0046] The working principle of the water flow regulating device in the shaft of the pumped storage power station provided by the present utility model is as follows:

[0047] During use, the intermediate pipe 1 is connected to the water supply pipe in the shaft by using the first connecting pipe 11, and then the intermediate pipe 1 is connected to the delivery pump by using the second connecting pipe 12. Then, during the process of starting the delivery pump to pump water, when it is necessary to adjust the delivery water flow, the adjusting member 5 can be used to adjust the sliding of the sealing end plate 42 in the intermediate pipe 1, so as to drive the sealing core tube 44 to move synchronously in the sealing seat tube 23, thereby adjusting the opening degree of the first diversion hole 201, and thus realizing the water flow regulation. Further, the driving motor 46 can be started to drive the transmission shaft 43 to rotate, thereby driving the sealing core tube 44 to rotate. When the sealing core tube 44 rotates, the second diversion hole 401 is driven to be docked with the first diversion hole 201, thereby further adjusting the water flow.

[0048] When the adjusting member 5 adjusts the movement of the sealing end plate 42 in the intermediate pipe 1, when it is necessary to adjust the opening degree to a large value, the second control valve 161 and the fourth control valve 55 are opened. Then, the water pump 51 is started to pump the water body into the inner cavity of the intermediate pipe 1 on one side of the sealing end plate 42. Then, the water pressure is used to push the sealing end plate 42 to drive the sealing core cylinder 44 to be withdrawn from the sealing seat cylinder 23, so as to adjust the opening degree of the first diversion hole 201. When it is necessary to adjust the opening degree to a small value, the first control valve 151 and the third control valve 54 are opened. Then, the water body is pumped into the inner cavity of the intermediate pipe 1 on the other side of the sealing end plate 42, so as to push the sealing end plate 42 to drive the sealing core cylinder 44 to insert into the sealing seat cylinder 23, so as to adjust the opening degree of the first diversion hole 201 to a small value. During the adjustment, when pumping water into one side inner cavity, the other side inner cavity drains water synchronously to achieve the balance of the pressurized water body. When the sealing end plate 42 slides and adjusts, the insertion rod 41 is synchronously driven to slide in the second sealing cover 3. Thus, the insertion rod 41 drives the indicating plate 7 to move along the opening scale 6, so as to directly read out the opening degree of the water flow through the opening scale 6. The bottom end of the second connecting pipe 12 is connected with a first flange 81 to realize the connection between the first flange 81 and the second connecting pipe 12. A first round pipe 82 is arranged below the first flange 81 for connecting the filter box assembly 83. The filter box assembly 83 is arranged at the bottom end of the first round pipe 82 for installing the filter net 93. The filter net 93 is detachably fixed inside the filter box assembly 83 through a fixing block 92 for filtering the flowing water to prevent impurities in the water from blocking or damaging the components in the water flow adjustment area. A second flange 86 is arranged at the bottom of the filter box assembly 83 for connecting the third flange 87. A second sealing ring 91 is arranged between the second flange 86 and the third flange 87 to improve the connection tightness. Cleaning pipes 84 are arranged on both sides of the filter box assembly 83 to facilitate the personnel to clean the impurities filtered out in the filter box assembly 83. One side of the cleaning pipe 84 is connected with a sealing round plate 85. When cleaning is not required, the cleaning pipe 84 is closed through the sealing round plate 85. A first sealing ring 90 is arranged between the cleaning pipe 84 and the sealing round plate 85 to improve the connection tightness.

[0049] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated here.

[0050] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A water flow regulating device in a vertical shaft of a pumped storage power station, comprising: An intermediate tube (1), wherein a connecting tube 1 (11) and a connecting tube 2 (12) are symmetrically inserted in the middle of the intermediate tube (1), a conduit 1 (13) and a conduit 2 (14) are respectively inserted on one side of the connecting tube 1 (11) on the intermediate tube (1), and a conduit 3 (15) and a conduit 4 (16) are respectively inserted on one side of the connecting tube 2 (12) on the intermediate tube (1); It is characterized by further comprising: A valve seat assembly (2) is mounted on one end of the intermediate tube (1), and the valve seat assembly (2) comprises a sealing cover (21), the sealing cover (21) is mounted on one end of the intermediate tube (1) by means of screws, and a connecting rod (22) is fixedly mounted on one end of the sealing cover (21) facing the intermediate tube (1), and a sealing seat cylinder (23) is fixedly mounted on one end of the connecting rod (22) facing away from the sealing cover (21), and the sealing seat cylinder (23) is provided with a flow guide hole (201); A sealing cover (2) (3) is mounted on the other end of the intermediate tube (1), and a valve core assembly (4) for adjusting the opening of the guide hole (201) is mounted on the sealing cover (2) (3), and the valve core assembly (4) includes a plug rod (41), and two of the plug rods (41) are provided. The two plug rods (41) are symmetrically mounted on the sealing cover (3), and one end of the two plug rods (41) extending into the intermediate tube (1) is jointly mounted with a sealing end plate (42), and the sealing end plate (42) is slidably matched with the intermediate tube (1), and the sealing end plate (42) is rotated by a sealing bearing. A transmission shaft (43) is installed, and a sealing core barrel (44) is fixedly installed on one end of the transmission shaft (43). The outer wall of the sealing core barrel (44) is slidably matched with the inner wall of the sealing seat barrel (23). A waterproof cover (45) is fixedly installed on the end of the sealing end plate (42) away from the sealing core barrel (44). A driving motor (46) is installed in the waterproof cover (45). The driving motor (46) is coaxially fixedly connected with the transmission shaft (43). An adjusting member (5) for driving the sealing end plate (42) to slide in the intermediate tube (1) is installed on the intermediate tube (1).

2. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: The sealing core cylinder (44) is symmetrically provided with a second flow guide hole (401).

3. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: The bottom ends of the conduit three (15) and the conduit four (16) are respectively installed with a control valve one (151) and a control valve two (161).

4. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: The regulating member (5) comprises a water pump (51), the liquid inlet end of the water pump (51) is connected to the connecting pipe 1 (11) through a water pipe, the liquid outlet end of the water pump (51) is connected to a drain pipe (52), the drain pipe (52) is connected to a conducting elbow (53), the two ends of the conducting elbow (53) are respectively connected to the conduit 1 (13) and the conduit 2 (14), and a control valve 3 (54) and a control valve 4 (55) are respectively embedded on both sides of the drain pipe (52) on the conducting elbow (53).

5. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: The conduit one (13) and the conduit two (14) are respectively arranged on both sides of the sealing end plate (42).

6. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: The conduit three (15) and the conduit four (16) are respectively arranged on both sides of the sealing end plate (42).

7. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: An opening scale (6) is fixedly mounted on the second sealing cover (3), an indicator plate (7) is fixedly mounted on the two insertion rods (41), and a sliding groove (701) is provided on the indicator plate (7) for sliding cooperation with the opening scale (6).

8. The water flow regulating device in the shaft of a pumped storage power station according to claim 1, characterized in that: The bottom end of the second connecting pipe (12) is connected to a first flange (81) by bolts, a first round tube (82) is arranged at the lower part of the first flange (81), a filter box assembly (83) is arranged at the bottom end of the first round tube (82), a filter screen (93) is detachably fixed inside the filter box assembly (83) by a fixing block (92), a second flange (86) is arranged at the bottom of the filter box assembly (83), the second flange (86) is connected to a third flange (87) by bolts, a second sealing ring (91) is arranged between the second flange (86) and the third flange (87), cleaning pipes (84) are arranged on both sides of the filter box assembly (83), one side of the cleaning pipe (84) is connected to a sealing circular plate (85) by bolts, and a first sealing ring (90) is arranged between the cleaning pipe (84) and the sealing circular plate (85).

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