Efficient energy-saving replacement device

Abstract

The utility model discloses an efficient energy-saving replacement device, and belongs to the technical field of heat energy replacement devices. The utility model is used for solving the technical problems that a large amount of replacement water needs to be heated again, so that the heat cost is caused, high-temperature crude synthesis gas generated by the reaction of the gasification furnace is directly discharged, high-temperature waste heat is not effectively utilized, and the heat resource is wasted. A slag collecting box is arranged at the bottom of the middle sleeve, a gasification furnace grate pipe is sleeved with the middles of the two ends of the middle sleeve in a penetrating mode, a heat exchange sleeve is sleeved with the surface of the gasification furnace grate pipe, an external valve is arranged at the bottom of one end of the heat exchange sleeve, multiple sets of annular guide frames are arranged in the heat exchange sleeve, and multiple sets of annular heat absorption frames are erected in the gasification furnace grate pipe. Therefore, heat conversion between hot impurity exhaust gas and water replacement can be achieved, and the hot impurity exhaust gas discharged outwards can be pushed through air exhaust to drive the rotary interception mechanism to conduct unpowered energy-saving type rotary self-cleaning interception on PM2.5 and viscous objects.

Description

Technical Field

[0001] The utility model relates to the technical field of heat energy replacement devices, in particular to a high-efficiency energy-saving replacement device. Background Art

[0002] In the gasification system, oxygen from the air separation unit and coal powder are fully mixed and atomized at the outlet of the combined burner, and a partial oxidation reaction is carried out in the combustion chamber to produce a crude synthesis gas rich in H2 and CO and a small amount of CO2 and H2S, and a commercial slag. The crude synthesis gas and liquid slag are washed and cooled in the quenching chamber. The crude synthesis gas enters the washing system for humidification, cooling, and dust removal, and then is sent to the methanol conversion unit. The ash falls to the bottom of the quenching chamber and enters the slag removal process. The produced black water enters the black water flash evaporation section for further sedimentation to remove the solid particles therein, and finally is sent to the sewage treatment plant for treatment;

[0003] In combination with the above content, it should be explained that during production, due to the difference in coal quality, the amount of calcium and magnesium ion content and the control of the temperature of the operating room will cause fluctuations in the hardness of the output black water. When the hardness of the water is high, it is generally adopted to increase the amount of replacement water and replace it with low-hardness boiler water. The main source of boiler water is desalted water from the water plant. The cost of replacement water is high, so that the replacement water needs to be reheated, which not only causes heat generation costs, but also the high-temperature crude synthesis gas produced by the gasification furnace reaction is directly discharged, and the high-temperature waste heat is not effectively utilized, resulting in a waste of heat resources;

[0004] In view of the above technical defects, a solution is now proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an efficient and energy-saving replacement device to solve the problem that the main source of boiler water is desalted water from a water plant, the cost of using the replacement water is relatively high, so that the replacement water needs to be reheated, which not only causes heat generation costs, but also the high-temperature crude synthesis gas produced by the gasification furnace reaction is directly discharged, and the high-temperature waste heat lacks effective utilization, resulting in a waste of thermal resources.

[0006] The purpose of the utility model can be achieved by the following technical solutions: an efficient and energy-saving replacement device, including a middle set, a slag collecting box is arranged at the bottom of the middle set, a gasification furnace row pipe is sleeved through the middle of both ends of the middle set, a heat exchange sleeve is sleeved on the surface of the gasification furnace row pipe, an external valve is arranged at the bottom of one end of the heat exchange sleeve, a plurality of ring guide frames are arranged inside the heat exchange sleeve, and a plurality of annular heat absorbing frames are arranged inside the gasification furnace row pipe;

[0007] An inner drawer box is slidably installed inside the slag collecting box, and a rotating intercepting mechanism extending into the gasification furnace grate pipe is rotatably connected to the top of the slag collecting box, and an upper guide fence plate rotatably connected to the inner wall of the gasification furnace grate pipe is arranged obliquely above the rotating intercepting mechanism. The rotating intercepting mechanism includes a rotating shaft 1, and a plurality of groups of fan blades are arranged in a circular array on the outer wall of the rotating shaft 1, an inner ring channel is arranged inside the fan blades, an inner ring pipe is arranged inside the upper guide fence plate, and a rotating shaft 2 which is sleeved with the gasification furnace grate pipe is arranged on the top of the upper guide fence plate.

[0008] Preferably, a plurality of groups of external water suction pipes are embedded on the inner wall of the outer side of the heat exchange sleeve, a plurality of groups of internal water supply pipes attached to the outer wall of the gasification furnace row pipe are arranged between the plurality of groups of external water suction pipes, the internal water supply pipes are connected to the ring guide frame, and the ring guide frame is clamped on the outer wall of the gasification furnace row pipe.

[0009] Preferably, the gasifier grate pipe is designed in a V-shaped structure, and an elliptical notch facing the slag collecting box is opened on the bottom wall in the middle of the gasifier grate pipe, and a circular array on the inner wall of the gasifier grate pipe has a water injection pipe and a water outlet pipe connecting the circular heat absorption frame and the ring guide frame, and the circular heat absorption frame is composed of a plurality of groups of circular ring pipes.

[0010] Preferably, a sealing strip connected to the inner drawer box is embedded on the outer wall of one side of the slag collecting box, and an anti-overflow cone mouth close to the gasification furnace grate pipe is arranged on the top of the slag collecting box.

[0011] Preferably, the two sides of the rotating shaft are sleeved on the inner wall at the top of the anti-overflow cone mouth, and hollow slip rings are symmetrically sleeved on both sides of the rotating shaft. A connecting pipe 1 connected to an external valve is provided at one end of the hollow slip ring, and a guide groove perpendicular to the rotating shaft 1 is recessed on the outer wall of the fan blade, and hollow slip rings and connecting pipe 1 are connected on both sides of the inner ring.

[0012] Preferably, both sides of the second rotating shaft are sleeved with the inner wall of the gasifier grate pipe, an arc groove embedded in the inner wall of the gasifier grate pipe is provided above the second rotating shaft, an inner arc frame is provided in the arc groove, an arc spring is sleeved on the surface of the inner arc frame, a cleaning scraper is sleeved at the groove of the outer wall of the arc groove, a connecting pipe second connecting the inner ring pipe and the external valve is provided at one end of the second rotating shaft, an outer arc frame inserted with the cleaning scraper and extending to the inside of the arc groove is provided on the outer wall of the upper guide plate, the outer arc frame is slidably sleeved with the inner arc frame, and the outer arc frame is movably abutted against the arc spring.

[0013] Beneficial effects of the utility model:

[0014] (1) The utility model uses the heat exchange sleeve and the gasification furnace tube structure in linkage, and uses the V-shaped lower curved part of the gasification furnace tube to guide the extracted hot mixed exhaust gas to buffer in this area. Multiple groups of pipes perform contact heat exchange with the buffered hot mixed exhaust gas in this area, forming a preliminary heat exchange, realizing the reheating of the replacement water, and forming the reuse of heat resources;

[0015] (2) The utility model uses a rotating interception mechanism and an upper guide plate to cooperate with the gasification furnace grate pipe and the slag collecting box for structural linkage, utilizes the rotating interception mechanism to contact with the buffered hot and mixed exhaust gas, and drives the fan blades to rotate through the pumped hot and mixed exhaust gas. The fan blades intercept PM2.5 and sticky substances in the hot and mixed exhaust gas through the guide plate, and the PM2.5 and sticky substances in the hot and mixed exhaust gas are thrown onto the inner wall of the V-shaped area of ​​the gasification furnace grate pipe through the rotation of the fan blades, and slide along the anti-overflow cone through the inner wall to the inner pumping box to collect the sticky substances. The upper guide plate is used to contact with the cooled hot and mixed exhaust gas discharged by the reverse flow, and the rotating interception mechanism contacts with the hot and mixed exhaust gas after the reverse flow. The intercepting mechanism constitutes a folding guide for the hot and mixed exhaust gas, which makes the hot and mixed exhaust gas fully contact with the two, and effectively intercepts the sticky substances and PM2.5 in the hot and mixed exhaust gas, and at the same time guides the water flow to circulate along the inner ring channel and the inner ring pipe, absorbing the waste heat in the contact hot and mixed exhaust gas. Therefore, it can not only constitute a highly efficient replacement and cooling of the hot and mixed exhaust gas, but also use the exhaust gas to push the external hot and mixed exhaust gas to drive the rotating intercepting mechanism to perform non-powered energy-saving rotating self-cleaning to intercept PM2.5 and sticky substances, which can greatly reduce the cost of heat replacement water generation and has great practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings;

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the gasification furnace tube and the heat exchange sleeve of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the gasification furnace tube of the utility model;

[0020] Figure 4 It is a cross-sectional structural schematic diagram of the casing, gasification furnace row pipe and slag collecting box in the utility model;

[0021] Figure 5 It is a structural schematic diagram of the rotary interception mechanism of the utility model;

[0022] Figure 6 This utility model Figure 4 Magnified view of area A.

[0023] Legend: 1. Middle set; 2. Gasification furnace row pipe; 201. Water injection pipe; 202. Water outlet pipe; 203. Annular heat absorption frame; 3. Heat exchange sleeve; 301. Inner water delivery pipe; 302. Outer water suction pipe; 303. Ring guide frame; 304. External valve; 4. Slag collecting box; 401. Sealing strip; 402. Inner pumping box; 403. Anti-overflow cone; 5. Rotary interception mechanism; 501. Rotating shaft one; 502. Hollow slip ring; 503. Connecting pipe one; 504. Fan blade; 505. Guide groove; 506. Inner ring channel; 6. Upper guide rail; 601. Inner ring pipe; 602. Rotating shaft two; 603. Connecting pipe two; 604. Arc groove; 605. Inner arc frame; 606. Arc spring; 607. Cleaning scraper; 608. Outer arc frame. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] This embodiment is used to solve the problem that the main source of boiler water is desalted water from a water plant, and the cost of replacing water is so high that the replacement water needs to be reheated, which not only causes heat generation costs, but also the high-temperature raw synthesis gas produced by the gasification furnace reaction is directly discharged, and the high-temperature waste heat is not effectively utilized, resulting in a waste of thermal resources.

[0027] See also Figure 1 - Figure 3 As shown, this embodiment is a high-efficiency energy-saving replacement device, including a middle set 1, a slag collecting box 4 is arranged at the bottom of the middle set 1, a gasification furnace row pipe 2 is sleeved through the middle of both ends of the middle set 1, a heat exchange sleeve 3 is sleeved on the surface of the gasification furnace row pipe 2, an external valve 304 is arranged at the bottom of one end of the heat exchange sleeve 3, a plurality of ring guide frames 303 are arranged inside the heat exchange sleeve 3, and a plurality of ring heat absorbing frames 203 are arranged inside the gasification furnace row pipe 2;

[0028] A plurality of groups of external water absorption pipes 302 are embedded on the inner wall of the outer side of the heat exchange sleeve 3, and a plurality of groups of internal water delivery pipes 301 attached to the outer wall of the gasification furnace row pipe 2 are arranged between the plurality of groups of external water absorption pipes 302, and the internal water delivery pipes 301 are connected to the ring guide frame 303, and the ring guide frame 303 is sleeved on the outer wall of the gasification furnace row pipe 2; the gasification furnace row pipe 2 is designed in a V-shaped structure, and an elliptical notch facing the slag collecting box 4 is opened on the bottom wall of the middle part of the gasification furnace row pipe 2, and a water injection pipe 201 and a water outlet pipe 202 connecting the annular heat absorbing frame 203 and the ring guide frame 303 are arranged in an annular array on the inner wall of the gasification furnace row pipe 2, and the annular heat absorbing frame 203 is composed of a plurality of groups of circular ring pipes;

[0029] The production water booster pump provides sufficient pressure for the production water to replenish water and replace it in the washing tower. The high-temperature crude synthesis gas produced by the gasification furnace reaction is used as the heat source of the production water / crude synthesis gas heat exchanger to heat the production water. While heating the production water, the temperature of the crude synthesis gas can also be controlled to change. The hot mixed exhaust gas generated by the operation of the gasifier is sucked and pushed into the gasification furnace row pipe 2 by the exhaust equipment. When it passes through the V-shaped area of ​​the gasification furnace row pipe 2, the external valve 304 is provided with a cold valve and a hot valve. The cold valve of the external valve 304 guides the external cold water to be diverted to the external suction pipe 302, the internal suction pipe, In the connecting pipe 1 503 and the connecting pipe 2 603, the outer water absorption pipe 302 flows back and forth along the outer wall of the heat exchange sleeve 3, and finally gathers the water in the heat valve for external transmission. The inner water delivery pipe 301 guides the cold water to pass through the outer wall of the heat exchange sleeve 3 for preliminary heat absorption, and is input into the annular heat absorption frame 203 along the water injection pipe 201. The annular heat absorption frame 203 contacts and exchanges heat with the hot mixed exhaust gas flowing in the gasification furnace tube 2, absorbs the residual heat in the hot mixed exhaust gas, and heats the cold water to obtain warm water, which is connected to the outer water absorption pipe 302 through the water outlet pipe 202, and guides the heated warm water along the outer water absorption pipe 302 into the heat valve.

[0030] Embodiment 2:

[0031] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 As shown, an efficient and energy-saving replacement device of this embodiment includes an inner drawer box 402 slidably installed inside a slag collecting box 4, a rotating interception mechanism 5 extending into the gasification furnace grate pipe 2 is rotatably connected to the top of the slag collecting box 4, and an upper guide plate 6 rotatably connected to the inner wall of the gasification furnace grate pipe 2 is arranged obliquely above the rotating interception mechanism 5, and the rotating interception mechanism 5 includes a rotating shaft 1 501, and a plurality of groups of fan blades 504 are arranged in an annular array on the outer wall of the rotating shaft 1 501, and an inner annular channel 506 is arranged inside the fan blades 504, an inner annular pipe 601 is arranged inside the upper guide plate 6, and a rotating shaft 2 602 sleeved with the gasification furnace grate pipe 2 is arranged on the top of the upper guide plate 6;

[0032] A sealing strip 401 connected to the inner pumping box 402 is embedded on the outer wall of one side of the slag collecting box 4, and an anti-overflow cone 403 close to the gasification furnace row pipe 2 is provided on the top of the slag collecting box 4; the two sides of the rotating shaft 501 are sleeved on the inner wall of the top of the anti-overflow cone 403, and hollow slip rings 502 are symmetrically sleeved on both sides of the rotating shaft 501, and a connecting pipe 503 connected to the external valve 304 is provided at one end of the hollow slip ring 502, and a guide groove 505 vertical to the rotating shaft 501 is recessed on the outer wall of the fan blade 504, and the hollow slip ring 502 and the connecting pipe 503 are connected on both sides of the inner ring 506;

[0033] The two sides of the second rotating shaft 602 are sleeved with the inner wall of the gasification furnace row pipe 2, and an arc groove 604 embedded in the inner wall of the gasification furnace row pipe 2 is arranged above the second rotating shaft 602, and an inner arc frame 605 is arranged in the arc groove 604, and an arc spring 606 is sleeved on the surface of the inner arc frame 605, and a cleaning scraper 607 is sleeved at the notch of the outer wall of the arc groove 604. A connecting pipe 603 connecting the inner ring pipe 601 and the external valve 304 is arranged at one end of the second rotating shaft 602, and an outer arc frame 608 inserted into the cleaning scraper 607 and extending to the inside of the arc groove 604 is arranged on the outer wall of the upper guide plate 6, and the outer arc frame 608 is slidably sleeved with the inner arc frame 605, and the outer arc frame 608 is movably abutted against the arc spring 606;

[0034] When the hot mixed exhaust gas approaches the elliptical notch area, it contacts the fan blade 504 and pushes it to rotate along the rotation axis 501. After the guide groove 505 on the surface of the fan blade 504 contacts the hot mixed exhaust gas, the PM2.5 and sticky substances in the hot mixed exhaust gas adhere to the guide groove 505, and are thrown to the surface of the gasification furnace grate pipe 2, the anti-overflow cone 403 and the upper guide plate 6 near the elliptical notch by the continuous rotation of the fan blade 504. The collected sticky substances are collected along the elliptical notch and the anti-overflow cone 403 by the pushing pressure of the hot mixed exhaust gas, and continue to be collected along the anti-overflow cone 403 to flow into the inner pumping box 402, and the PM2.5 and sticky substances attached to the inner walls of the two ends of the gasification furnace grate pipe 2 slide along the V-shaped inclined inner wall of the gasification furnace grate pipe 2 and flow into the anti-overflow cone 403 when the hot mixed exhaust gas stops pumping;

[0035] The hot mixed exhaust gas is folded and directed toward the upper guide plate 6 by the fan blade 504. After it collides with the upper guide plate 6, some PM2.5 and sticky substances are further intercepted. At the same time, connecting pipe 1 503 and connecting pipe 2 603 guide cold water into the inner ring channel 506 and the inner ring pipe 601. It flows along the fan blade 504 and the upper guide plate 6, absorbs the residual heat of the hot mixed exhaust gas in contact with the fan blade 504 and the upper guide plate 6, and flows back to the thermal valve.

[0036] In combination with the first embodiment and the second embodiment, the heat exchange sleeve 3 can be used in linkage with the gasification furnace grate pipe 2 structure, and the V-shaped lower curved part of the gasification furnace grate pipe 2 can be used to guide the extracted hot and mixed exhaust gas to be buffered in this area. Multiple groups of pipes can perform contact heat exchange with the buffered hot and mixed exhaust gas in this area to form a preliminary heat replacement, thereby realizing the reheating of the replacement water and the reuse of heat resources. The rotating interception mechanism 5 and the upper guide plate 6 can be used in linkage with the gasification furnace grate pipe 2 and the slag collecting box 4 in structure, and the rotating interception mechanism 5 can be used to contact the buffered hot and mixed exhaust gas. The pumped hot and mixed exhaust gas drives the fan blades 504 to rotate. The fan blades 504 intercept PM2.5 and sticky substances in the hot and mixed exhaust gas through the guide plate, and the fan blades 504 rotate and throw them into the gasification furnace grate pipe 2V On the inner wall of the g-shaped area, it slides down along the anti-overflow cone 403 through its inner wall to the inner pumping box 402 to collect sticky substances, and uses the upper guide plate 6 to contact the cooled hot and mixed exhaust gas discharged by the reverse flow. It and the rotating interception mechanism 5 form a folded guide for the hot and mixed exhaust gas, which promotes the hot and mixed exhaust gas to fully contact the two, and effectively intercepts the sticky substances and PM2.5 in the hot and mixed exhaust gas. At the same time, it guides the water flow to circulate along the inner ring channel 506 and the inner ring pipe 601 to absorb the residual heat in the contact hot and mixed exhaust gas. Therefore, it can not only constitute a highly efficient replacement cooling of the hot and mixed exhaust gas, but also use the exhaust gas to push the hot and mixed exhaust gas to drive the rotating interception mechanism 5 to perform non-powered energy-saving rotation self-cleaning interception of PM2.5 and sticky substances, which can greatly reduce the cost of heat replacement water generation and has increased practical value.

[0037] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency and energy-saving replacement device, comprising a middle kit (1), characterized in that: A slag collecting box (4) is arranged at the bottom of the middle set (1), a gasification furnace row pipe (2) is sleeved through the middle of both ends of the middle set (1), a heat exchange sleeve (3) is sleeved on the surface of the gasification furnace row pipe (2), an external valve (304) is arranged at the bottom of one end of the heat exchange sleeve (3), a plurality of ring guide frames (303) are arranged inside the heat exchange sleeve (3), and a plurality of ring heat absorbing frames (203) are arranged inside the gasification furnace row pipe (2); An inner drawer box (402) is slidably installed inside the slag collecting box (4), and a rotating interception mechanism (5) extending into the gasification grate pipe (2) is rotatably connected to the top of the slag collecting box (4), and an upper guide plate (6) rotatably connected to the inner wall of the gasification grate pipe (2) is arranged obliquely above the rotating interception mechanism (5), and the rotating interception mechanism (5) includes a rotating shaft one (501), and a plurality of groups of fan blades (504) are arranged in a circular array on the outer wall of the rotating shaft one (501), and an inner ring channel (506) is arranged inside the fan blades (504), an inner ring pipe (601) is arranged inside the upper guide plate (6), and a rotating shaft two (602) sleeved with the gasification grate pipe (2) is arranged on the top of the upper guide plate (6).

2. A high-efficiency energy-saving replacement device according to claim 1, characterized in that: A plurality of groups of external water suction pipes (302) are embedded on the inner wall of the outer side of the heat exchange sleeve (3), and a plurality of groups of internal water delivery pipes (301) attached to the outer wall of the gasification furnace row pipe (2) are arranged between the plurality of groups of external water suction pipes (302). The internal water delivery pipes (301) are connected to the ring guide frame (303), and the ring guide frame (303) is hooped on the outer wall of the gasification furnace row pipe (2).

3. The high-efficiency energy-saving replacement device according to claim 1, characterized in that: The gasification grate pipe (2) is designed in a V-shaped structure, and an elliptical notch facing the slag collecting box (4) is opened on the bottom wall of the middle part of the gasification grate pipe (2). A water injection pipe (201) and a water outlet pipe (202) connecting the annular heat absorbing frame (203) and the annular guide frame (303) are provided in an annular array on the inner wall of the gasification grate pipe (2). The annular heat absorbing frame (203) is composed of a plurality of groups of circular ring pipes spliced ​​together.

4. The high-efficiency energy-saving replacement device according to claim 1, characterized in that: A sealing strip (401) connected to an inner draw box (402) is embedded on the outer wall of one side of the slag collecting box (4), and an anti-overflow cone (403) close to the gasification furnace grate pipe (2) is arranged on the top of the slag collecting box (4).

5. The high-efficiency energy-saving replacement device according to claim 4, characterized in that: The two sides of the rotating shaft (501) are sleeved on the inner wall at the top of the anti-overflow cone (403), and hollow slip rings (502) are symmetrically sleeved on the two sides of the rotating shaft (501). A connecting pipe (503) connected to an external valve (304) is provided at one end of the hollow slip ring (502). A guide groove (505) perpendicular to the rotating shaft (501) is recessed on the outer wall of the fan blade (504), and the two sides of the inner ring (506) are connected to the hollow slip ring (502) and the connecting pipe (503).

6. The high-efficiency energy-saving replacement device according to claim 5, characterized in that: The two sides of the second rotating shaft (602) are sleeved with the inner wall of the gasification furnace grate pipe (2); an arc-shaped groove (604) embedded in the inner wall of the gasification furnace grate pipe (2) is arranged above the second rotating shaft (602); an inner arc frame (605) is arranged inside the arc-shaped groove (604); an arc spring (606) is sleeved on the surface of the inner arc frame (605); a cleaning scraper (607) is sleeved at the notch of the outer wall of the arc-shaped groove (604); A second connecting pipe (603) connecting the inner ring pipe (601) and the external valve (304) is provided at one end of the second rotating shaft (602); an outer arc frame (608) inserted into a cleaning scraper (607) and extending to the inside of the arc groove (604) is provided on the outer wall of the upper guide plate (6); the outer arc frame (608) is slidably sleeved with the inner arc frame (605), and the outer arc frame (608) is movably abutted against the arc spring (606).

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