Ash gate slide valve for combustion furnace

Abstract

The present invention relates to the technical field of thermal power generation, and in particular to an ash gate sliding valve for a combustion furnace, including the following technical solutions: an ash gate sliding valve for a combustion furnace, including a frame and an ash hopper, a driving component for controlling the opening and closing of the ash hopper is arranged on the frame, and a gate plate is arranged in the ash hopper, characterized in that the driving component and the gate plate are connected by a hinge, and the driving component drives the gate plate to slide back and forth in a straight line away from the driving component or close to the driving component, and the discharge of furnace ash is controlled by the opening and closing of the gate plate. The advantages of the present invention are that the gate plate of the ash gate sliding valve does not require an additional elastic clamping device, so there is no need to perform maintenance and replacement after the elastic component is worn, the bottom plate carried by the gate plate reduces the friction resistance generated during sliding, reduces the manufacturing difficulty of the ash gate sliding valve, and increases the service life of the ash gate sliding valve. The ash gate sliding valve of the present invention is conducive to preventing furnace ash from overflowing, thereby keeping the environment of the boiler room clean.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation, in particular to an ash gate sliding valve for a combustion furnace. Background Art

[0002] In thermal power generation technology, the sealing of the ash discharge port of the combustion furnace is very important. If the sealing is not good, the ash will overflow, which is not only not conducive to maintaining the cleanliness of the boiler room environment, but also affects the negative pressure condition inside the combustion furnace, resulting in unstable pressure inside the combustion furnace; in the prior art, flat gate valves are mostly used at the ash discharge port. The flat gate valve needs to be provided with a sealing device with an elastic clamping device between the frame and the sliding gate plate to ensure that there is no gap between the frame and the sliding gate plate, and the sliding gate plate can be opened and closed; however, the elastic clamping device is generally a nylon plate or a graphite fiber packing. After being used for a period of time, the elastic component needs to be maintained and replaced. At the same time, the gate plate of the flat gate valve is very easy to be damaged due to the resistance and thermal deformation generated during sliding, and the service life is not long, which cannot meet the production needs well, so further research and development and improvement are needed. Summary of the invention

[0003] One of the objects of the present invention is to overcome the above disadvantages and provide an ash gate sliding valve for a combustion furnace which does not require an additional elastic clamping device and is durable and reliable.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an ash gate sliding valve for a combustion furnace, comprising a frame and an ash hopper, a driving component is arranged on the frame, the ash hopper is provided with an upper opening and a lower opening, a gate plate is arranged in the ash hopper, the gate plate is composed of a top plate, a middle plate, a bottom plate and a connecting block, the upper opening of the ash hopper is connected to the combustion furnace by fasteners, the lower opening of the ash hopper is connected to the next ash discharge equipment by fasteners, the driving component and the gate plate are hingedly connected, the driving component drives the gate plate to slide back and forth in a straight line away from the driving component or close to the driving component, when the gate plate slides to a stop position in a direction away from the power component, the ash gate sliding valve is closed to prevent the ash from overflowing; when the gate plate slides to a stop position in a direction close to the driving component, the ash gate sliding valve is opened to discharge the ash.

[0005] Among them, the connecting block of the gate plate is arranged on the upper surface of the top plate, the top plate and the bottom plate are welded and connected by the middle plate, the cross-section of the bottom plate is a right-angled triangle, the right-angled side faces forward, the bottom plate is in sliding contact with the inner lower surface of the frame, reducing the friction resistance of the gate plate. At the same time, the right-angled side of the bottom plate can push the furnace ash slag brought to the inner lower surface of the frame when the gate plate is opened into the ash hopper.

[0006] Among them, adjustable wedge blocks are arranged on the left and right sides of the inner side of the frame, and adjusting bolts are arranged on the adjustable wedge blocks. The position of the adjustable wedge blocks can be adjusted by adjusting bolts. Wedge guide blocks are arranged on the left and right sides of the gate plate, and the wedge guide blocks slide on the adjustable wedge blocks. When the gate plate moves in the closing direction, the gate plate is lifted upward with the cooperation of the wedge guide blocks and the adjustable wedge blocks. When the gate plate is in a fully closed state, the upper surface of the gate plate is completely in contact with the lower edge of the opening on the ash hopper, so that the ash gate sliding valve is in a closed state.

[0007] Among them, a first opening is arranged on the upper surface of the frame, and a chamfer is arranged on the downward side of the edge of the first opening. A first cover plate is arranged in the first opening. The size of the first cover plate is 2~5mm smaller than that of the first opening, and the thickness of the first cover plate is 2~3mm smaller than the thickness of the upper surface of the frame. The first cover plate can move up and down in the first opening, and the amount of movement can meet the movement amount when the gate plate is lifted upward under the action of the adjustable wedge block. The first cover plate is provided with a second opening.

[0008] Furthermore, the first cover plate is covered with a second cover plate, and the second cover plate is provided with a third opening. The size of the third opening is consistent with the size of the connecting block. The connecting block passes through the second opening from bottom to top, and the third opening is connected to the driving component. The second cover plate performs linear reciprocating motion with the connecting block. The second cover plate can block the ash overflowing in and out of the frame.

[0009] Preferably, the first opening is in a rhombus shape.

[0010] Preferably, the first cover plate is in a rhombus shape.

[0011] Furthermore, the frame is provided with a proximity switch mounting seat on the side close to the driving component. The proximity switch mounting seat is U-shaped and is connected to the frame by bolts. A slot is provided on the long side of the U-shape of the proximity switch mounting seat. The proximity switch is fixed to the proximity switch mounting seat by bolts, and the proximity switch can be adjusted forward and backward.

[0012] Preferably, a proximity switch sensing block is provided on the second cover plate, and the stroke of the hydraulic cylinder can be set by adjusting the position of the proximity switch on the proximity switch mounting seat.

[0013] Preferably, the driving component is a hydraulic cylinder.

[0014] Preferably, the rotatable fastener is a pin.

[0015] Furthermore, the pin shaft is provided with a groove, and the pin shaft is equipped with a pressure plate, which is clamped in the groove on the pin shaft and connected to the connecting block with a fixing bolt. This method is more secure and simple than the cotter pin connection.

[0016] Furthermore, a dust cleaning port is provided on the upper surface of the frame, and a cover is provided on the dust cleaning port.

[0017] The advantages of the present invention are that the gate plate of the ash gate sliding valve does not require an additional elastic clamping device, so there is no need for maintenance and replacement after the elastic component is worn. The bottom plate carried by the gate plate reduces the friction resistance generated during sliding, reduces the manufacturing difficulty of the ash gate sliding valve, and increases the service life of the ash gate sliding valve. The ash gate sliding valve of the present invention is beneficial to preventing furnace ash from overflowing, thereby keeping the environment of the boiler room clean and tidy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a three-dimensional schematic diagram of the ash gate sliding valve for the combustion furnace of Example 1;

[0019] Attached Figure 2 It is a three-dimensional schematic diagram of the gate plate of the ash gate sliding valve for the combustion furnace of Example 1;

[0020] Attached Figure 3 The sectional view of the ash hopper of the ash gate sliding valve for the combustion furnace of Example 1 is shown;

[0021] Attached Figure 4 It is a top view of the frame of the ash gate sliding valve for the combustion furnace of Example 1;

[0022] Attached Figure 5 It is a cross-sectional schematic diagram of the ash gate sliding valve for the combustion furnace of Example 1. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] In the description of the present invention, unless otherwise stated, the directional words contained in the terms such as "upper, lower, inside, outside" merely represent the orientation of the terms in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the terms.

[0025] In the description of the present invention, in its different implementation modes, different technical features and technical solutions can be used in conjunction with each other as long as there is no conflict between the technical features and technical solutions.

[0026] The terms "comprises" and "comprising" and any variations thereof in the description and claims of the present invention and the drawings, are intended to cover a non-exclusive inclusion.

[0027] Example 1: Figure 1-5As shown, an ash gate slide valve for a combustion furnace includes a frame 1 and an ash hopper 2, a driving component 11 is provided on the frame 1, the ash hopper 2 is provided with an upper opening 21 and a lower opening 22, a gate plate 20 is provided in the ash hopper 2, the upper opening 21 of the ash hopper 2 is connected to the combustion furnace through fasteners, the lower opening 22 of the ash hopper 2 is connected to the next ash discharge equipment through fasteners, the driving component 11 is connected to the gate plate 20 through rotatable fasteners, the driving component 11 drives the gate plate 20 to slide back and forth, when the gate plate 20 slides to a stop position in a direction away from the driving component 11, the ash gate slide valve is closed to prevent the ash from overflowing; when the gate plate 20 slides to a stop position in a direction close to the driving component 11, the ash gate slide valve is opened to discharge the ash.

[0028] Among them, the gate 20 is composed of a gate 201, a bottom plate 202, an intermediate plate 203 and a connecting block 204. The connecting block 204 is arranged on the upper surface of the gate 201, the intermediate plate 203 is arranged on the lower surface of the gate 201, and the bottom plate 202 is arranged below the intermediate plate 203. The cross-section of the bottom plate 202 is a right triangle with the right angle side facing forward. The bottom plate 202 is in sliding contact with the inner lower surface of the frame 1 to reduce the friction resistance of the gate 20. At the same time, the right angle side of the bottom plate 202 can push the furnace ash slag brought to the inner lower surface of the frame 1 when the gate 20 is opened into the ash hopper.

[0029] Among them, adjustable wedge blocks 10 are arranged on the left and right sides of the inner side of the frame 1, and adjusting bolts 101 are arranged on the adjustable wedge blocks 10. The position of the adjustable wedge blocks 10 can be adjusted by adjusting bolts 101. Wedge guide blocks 205 are arranged on the left and right sides of the gate plate 20. The wedge guide blocks 205 slide on the adjustable wedge blocks 10. When the gate plate 20 moves in the closing direction, the gate plate 20 is lifted upward with the cooperation of the wedge guide blocks 205 and the adjustable wedge blocks 10. When the gate plate 20 is in a fully closed state, the upper surface of the gate plate 20 is completely in contact with the lower edge of the upper opening 21 of the ash hopper 2, so that the ash gate sliding valve is in a closed state.

[0030] Among them, a first opening 102 is arranged on the upper surface of the frame 1, and a chamfer is arranged on the downward side of the hole edge of the first opening 102, and a first cover plate 103 is arranged in the first opening 102. The size of the first cover plate 103 is 2~5mm smaller than the first opening 102, and the thickness of the first cover plate 103 is 2~3mm smaller than the thickness of the upper surface of the frame 1. The first cover plate 103 can move up and down in the first opening 102, and the amount of movement can meet the movement amount when the gate plate 20 is lifted upward under the action of the adjustable wedge block 10, and the first cover plate 103 is provided with a second opening 104.

[0031] Furthermore, the first cover plate 103 is covered with a second cover plate 105, and the second cover plate 105 is provided with a third opening 106. The size of the third opening 106 is consistent with that of the connecting block 204. The connecting block 204 passes through the second opening 104 and the third opening 106 from bottom to top and is connected to the driving component 11. The second cover plate 105 performs a linear reciprocating motion with the connecting block 204. The second cover plate 105 can block the ash overflowing inside and outside the frame 1.

[0032] Furthermore, the frame 1 is provided with a proximity switch mounting base 12 on the side close to the driving component 11. The proximity switch mounting base 12 is U-shaped. The proximity switch mounting base 12 is connected to the frame 1 by bolts. A slot 121 is provided on the long side of the U-shape of the proximity switch mounting base 12. The proximity switch 13 is fixed to the proximity switch mounting base 12 by bolts, and the proximity switch 13 can be adjusted forward and backward.

[0033] Preferably, a proximity switch sensing block 107 is disposed on the second cover plate 105 , and the stroke of the driving component 11 can be set by adjusting the position of the proximity switch 13 on the proximity switch mounting seat 12 .

[0034] Preferably, the driving component 11 is a hydraulic cylinder 110 .

[0035] Preferably, the rotatable fastener is a pin 15 .

[0036] Furthermore, the pin shaft 15 is provided with a groove 151, and the pin shaft 15 is equipped with a pressure plate 152, which is stuck in the groove 151 on the pin shaft 15 and connected to the connecting block 204 with a set bolt. This method is more secure and simple than the cotter pin connection.

[0037] Furthermore, a cleaning port 16 is provided on the upper surface of the frame 1, and a cover 161 is provided on the cleaning port 16. When ash is brought into the frame 1 and cannot be pushed back into the ash hopper by the bottom plate 202, the cover 161 can be opened regularly to perform manual cleaning or maintenance work through the cleaning port 16.

[0038] Embodiment 2: Preferably, in a preferred embodiment, in order to reduce the cost of the equipment and provide convenient driving, the hydraulic cylinder 12 in the embodiment 1 can be replaced by a cylinder 120.

[0039] Of course, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of use of the present invention. Therefore, any equivalent changes made to the principles of the present invention should be included in the protection scope of the invention.

Claims

1. An ash gate sliding valve for a combustion furnace, comprising a frame and an ash hopper, the frame is provided with a driving component for controlling the opening and closing of the ash hopper, the ash hopper is provided with an upper opening and a lower opening, a gate is provided in the ash hopper, the gate is composed of a top plate, a middle plate, a bottom plate, and a connecting block, and is characterized in that: The driving component is connected to the gate plate by a hinge, and the driving component drives the gate plate to slide back and forth in a straight line away from or close to the driving component. The connecting block of the gate plate is arranged on the upper surface of the panel, and the top plate and the bottom plate are welded and connected by the middle plate. The cross section of the bottom plate is a right triangle with the right angle side facing forward, and the bottom plate is in sliding contact with the lower surface of the inner side of the frame. Adjustable wedge blocks are arranged on the left and right sides of the inner side of the frame, and adjusting bolts are arranged on the adjustable wedge blocks. Wedge guide blocks are arranged on the left and right sides of the gate plate. A first opening is arranged on the upper surface of the frame, and a chamfer is arranged on the downward side of the hole edge of the first opening. A first cover plate is arranged in the first opening, and the size of the first cover plate is smaller than the size of the first opening, and the thickness of the first cover plate is smaller than the thickness of the upper surface of the frame. The first cover plate is provided with a second opening, and the first cover plate is covered with a second cover plate. The second cover plate is provided with a third opening, and the size of the third opening is consistent with the size of the connecting block. The connecting block passes through the second opening and the third opening from bottom to top to connect with the driving component.

2. The ash gate slide valve for a combustion furnace according to claim 1, characterized in that: The frame is provided with a proximity switch mounting seat on the side close to the driving component. The proximity switch mounting seat is U-shaped and connected to the frame by bolts. A slot is provided on the long side of the U-shape of the proximity switch mounting seat, and the proximity switch is fixed to the proximity switch mounting seat by bolts.

3. The ash gate sliding valve for a combustion furnace according to claim 1, characterized in that: The second cover plate is provided with a proximity switch sensing block.

4. The ash gate sliding valve for a combustion furnace according to claim 1, characterized in that: The driving component is connected to the gate plate through a rotatable fastener, which is a pin shaft. The pin shaft is provided with a groove, and the pin shaft is equipped with a pressure plate. The pressure plate is stuck in the groove on the pin shaft, and the pressure plate is connected to the connecting block with a fixing bolt.

5. An ash gate sliding valve for a combustion furnace according to any one of claims 1 to 4, characterized in that: The upper surface of the frame is provided with an ash cleaning port, and the ash cleaning port is provided with a cover.

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