Furnace top sealing structure of downdraft biomass gasifier

Abstract

The utility model discloses a furnace top sealing structure of a downdraft biomass gasification furnace, and particularly relates to the technical field of gasification furnace sealing, a sliding rod is arranged in a sliding guide groove in a sliding mode, a first vertical plate is arranged on the sliding rod, an elastic piece is arranged on the first vertical plate, a cavity is formed in a cover body, a piston plate is arranged in the cavity in a sliding mode, and the elastic piece is arranged on the piston plate. A circulating groove is formed in the bottom of the cavity, and a plurality of second vertical plates which are arranged in a circumferential array mode and correspond to the first vertical plates are arranged at the bottom of the cover body. According to the furnace top sealing structure of the downdraft biomass gasification furnace, the furnace body is sealed through the cover body on the furnace body, the furnace body is sealed through the sealing assembly, the sliding rod is guided through the guide sliding groove formed by the fixing block, so that the sliding rod extends to the furnace body from the cover body to seal the furnace body, and the furnace body is sealed through the cavity in the cover body. And the piston plate in the cavity pressurizes the plurality of guide sliding rods, so that the sliding rods slide in the guide sliding grooves to be fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of gasifier seals, and more specifically to a sealing structure at the top of a downdraft biomass gasifier. Background Art

[0002] The downdraft biomass gasifier is an efficient energy conversion device that uses biomass raw materials, such as crop straws, wood chips, etc., to produce combustible gas through gasification reactions. The seal of the furnace cover is an important part of the gasifier, and its function is to ensure the gas tightness during the gasification process, prevent gas leakage, and ensure gasification efficiency and safe operation.

[0003] According to the publication (announcement) number: CN204224548U, the publication (announcement) date: March 25, 2015, a disclosed downdraft biomass gasifier for burning biomass raw materials to produce gaseous fuel includes: an upper furnace body with a plurality of air inlet holes for introducing combustion-supporting air provided on its side wall; a lower furnace body provided below the upper furnace body; an output device communicating with the lower furnace body to output the gaseous fuel generated after the reaction of the biomass raw materials; a gas supply device for providing combustion-supporting gas for the combustion of the biomass raw materials, and a steam isolation device for providing a steam isolation layer in the biomass raw materials, and a device for producing combustion-supporting steam and isolation steam uses the waste heat of the lower furnace body or the waste heat carried by the gaseous fuel as a heat source for production.

[0004] As can be seen from the above patent and the prior art, when the gasifier is in use, the furnace cover of the gasifier needs to be sealed. Good sealing performance also helps to maintain the pressure balance inside the furnace, prevent damage to the furnace body due to unstable pressure, and at the same time, the seal can also prevent external pollutants from entering the furnace and affecting the gasification process and gasification quality. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a sealing structure at the top of a downdraft biomass gasifier, which realizes the sealing of the furnace opening of the biomass gasifier.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a sealing structure at the top of a downdraft biomass gasifier, including a furnace body, a cover body is provided on the furnace body, and a sealing component is provided on the cover body;

[0007] The sealing component includes a plurality of fixing blocks arranged in a circumferential array, a predetermined gap is left between every two of the fixing blocks to form a guide chute, a sliding rod is slidably arranged in the guide chute, a first vertical plate is arranged on the sliding rod, an elastic member is arranged on the first vertical plate, a cavity is opened on the cover body, a piston plate is slidably arranged in the cavity, a flow-through groove is opened at the bottom of the cavity, and a plurality of second vertical plates arranged in a circumferential array and corresponding to the first vertical plate are provided at the bottom of the cover body.

[0008] Preferably, a push rod is provided on the piston plate, and a notch is formed on the push rod.

[0009] Preferably, a rotating rod is rotatably provided on the notch, and the diameter of the rotating rod outside the notch is the same as the diameter of the push rod.

[0010] Preferably, the rotating rod outside the notch is threadedly connected to the cover body.

[0011] Preferably, an air cavity is formed on the sliding rod, and the air cavity is communicated with the inside of the cover body.

[0012] Preferably, a plurality of rotating grooves arranged in a linear array are formed on the sliding rod, and a guiding sliding rod is provided on the rotating groove.

[0013] Preferably, it includes a furnace body, and a fixing groove is formed at the end of the sliding rod, and the fixing groove cooperates with a plug rod provided at the end of the furnace body.

[0014] Preferably, the elastic member is a spring.

[0015] In the above technical solution, a sealing structure for the top of the furnace of a down-draft biomass gasifier provided by the present utility model has the following beneficial effects: The furnace body is sealed by the cover body on the furnace body, the furnace body is sealed by the sealing component, the guiding sliding groove formed by the fixing block is used to guide the sliding rod, so that the sliding rod extends from the cover body to the furnace body to seal the furnace body, through the cavity on the cover body and the piston plate in the cavity to press a plurality of guiding sliding rods, so that the sliding rod slides in the guiding sliding groove to be fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the cover body and the guiding sliding component provided by an embodiment of the present utility model;

[0019] Figure 3 It is a schematic diagram of the sectional structure provided by an embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the fixing component provided by an embodiment of the present utility model.

[0021] Description of the reference numerals:

[0022] 1. Furnace body; 100. Sealing assembly; 2. Cover body; 21. Rotating rod; 22. Push rod; 23. Notch; 24. Piston plate; 25. Cavity; 26. Flow channel; 27. Guide sliding assembly; 28. First vertical plate; 29. Elastic member; 30. Second vertical plate; 31. Slide bar; 32. Air cavity; 33. Rotating groove; 331. Guide slide bar; 34. Plug rod; 35. Fixed groove; 4. Fixed block; 41. Guide sliding groove. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] As Figures 1-4 shown, a sealing structure for the top of a downdraft biomass gasifier includes a furnace body 1, a cover body 2 is arranged on the furnace body 1, and a sealing assembly 100 is arranged on the cover body 2;

[0025] The sealing assembly 100 includes a plurality of fixed blocks 4 arranged in a circumferential array. A predetermined gap is left between every two fixed blocks 4 to form a guide sliding groove 41. A slide bar 31 is slidably arranged in the guide sliding groove 41. A first vertical plate 28 is arranged on the slide bar 31. An elastic member 29 is arranged on the first vertical plate 28. A cavity 25 is opened on the cover body 2. A piston plate 24 is slidably arranged in the cavity 25. A flow channel 26 is opened at the bottom of the cavity 25. A plurality of second vertical plates 30 arranged in a circumferential array and corresponding to the first vertical plate 28 are arranged at the bottom of the cover body 2.

[0026] Specifically, during use, the cover body 2 on the furnace body 1 is opened, then the biological material is placed into the furnace body 1, then the cover body 2 is covered on the furnace body 1, then the piston plate 24 in the cavity 25 of the cover body 2 is moved downward, and gas enters the flow channel 26. Then the gas pushes the slide bar 31 to slide outward in the guide sliding groove 41 formed by the two fixed blocks 4. During the movement, the first vertical plate 28 moves synchronously. At the same time, the elastic member 29 contacts the second vertical plate 30. When unlocking is required, the elastic member 29 releases force to reset the slide bar 31.

[0027] In the above solution, the furnace body 1 is sealed by the cover body 2 on the furnace body 1, the furnace body 1 is sealed by the sealing assembly 100, the guide sliding groove 41 formed by the fixed blocks 4 is used to guide the slide bar 331, so that the slide bar 31 extends from the cover body 2 to the furnace body 1 to seal the furnace body 1. Through the cavity 25 on the cover body 2 and the piston plate 24 in the cavity 25, pressure is applied to the plurality of guide slide bars 331, so that the slide bar 31 slides in the guide sliding groove 41 to be fixed.

[0028] As a further embodiment provided by the present utility model, according to Figure 1 and Figure 2 as shown, a push rod 22 is provided on the piston plate 24, and a notch 23 is formed on the push rod 22.

[0029] Furthermore, a rotating rod 21 is rotatably provided on the notch 23, and the diameter of the rotating rod 21 outside the notch 23 is the same as that of the push rod 22.

[0030] Even further, the rotating rod 21 outside the notch 23 is threadedly connected to the cover body 2.

[0031] Even further, an air cavity 32 is formed on the sliding rod 31, and the air cavity 32 is communicated with the inside of the cover body 2.

[0032] Even further, a plurality of rotating grooves 33 arranged in a linear array are formed on the sliding rod 31, and a guiding sliding rod 331 is provided on the rotating grooves 33.

[0033] Even further, it includes a furnace body 1. A fixing groove 35 is formed at the end of the sliding rod 31, and the fixing groove 35 cooperates with an inserting rod 34 provided at the end of the furnace body 1.

[0034] Specifically, after covering the cover body 2 on the furnace body 1, press down the rotating rod 21 on the cover body 2, drive the push rod 22 downward, and at the same time drive the piston plate 24 to move in the cavity 25 inside the cover body 2. When the rotating rod 21 contacts the cover body 2, rotate the rotating rod 21 to threadedly connect the rotating rod 21 to the cover body 2 to fix the piston plate 24. At the same time, when the sliding rod 31 moves, it will be inserted and fixed on the inserting rod 34 on the furnace body 1 to fix the cover body 2 on the furnace body 1.

[0035] Working principle: During use, open the cover body 2 on the furnace body 1, then put the biological material into the furnace body 1, and then cover the cover body 2 on the furnace body 1. After covering the cover body 2 on the furnace body 1, press down the rotating rod 21 on the cover body 2, drive the push rod 22 downward, and at the same time drive the piston plate 24 to move in the cavity 25 inside the cover body 2. When the rotating rod 21 contacts the cover body 2, rotate the rotating rod 21 to threadedly connect the rotating rod 21 to the cover body 2 to fix the piston plate 24 and allow gas to enter the flow groove 26. Then the gas pushes the sliding rod 31 to slide outward in the guiding sliding groove 41 formed by the two fixing blocks 4. When moving, it will be inserted and fixed on the inserting rod 34 on the furnace body 1 to fix the cover body 2 on the furnace body 1. During the movement, the first vertical plate 28 moves synchronously, and at the same time the elastic member 29 contacts the second vertical plate 30. When unlocking is required, the elastic member 29 releases force to reset the sliding rod 31.

[0036] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A sealing structure for the top of a downdraft biomass gasifier, characterized in that, It includes a furnace body (1), a cover body (2) is arranged on the furnace body (1), and a sealing assembly (100) is arranged on the cover body (2); The sealing assembly (100) includes a plurality of fixing blocks (4) arranged in a circumferential array. A predetermined gap is left between every two fixing blocks (4) to form a guide chute (41). A sliding rod (31) is slidably arranged in the guide chute (41). A first vertical plate (28) is arranged on the sliding rod (31). An elastic member (29) is arranged on the first vertical plate (28). A cavity (25) is formed in the cover body (2). A piston plate (24) is slidably arranged in the cavity (25). A flow groove (26) is formed at the bottom of the cavity (25). A plurality of second vertical plates (30) arranged in a circumferential array and corresponding to the first vertical plate (28) are arranged at the bottom of the cover body (2).

2. The top sealing structure of a down-draft biomass gasifier according to claim 1, characterized in that, A push rod (22) is arranged on the piston plate (24), and a notch (23) is formed in the push rod (22).

3. The top sealing structure of a downdraft biomass gasifier according to claim 2, characterized in that, A rotating rod (21) is rotatably arranged on the notch (23). The diameter of the rotating rod (21) outside the notch (23) is the same as the diameter of the push rod (22).

4. The top sealing structure of a downdraft biomass gasifier according to claim 3, characterized in that, The rotating rod (21) outside the notch (23) is threadedly connected to the cover body (2).

5. The top sealing structure of a downdraft biomass gasifier according to claim 1, characterized in that, An air cavity (32) is formed in the sliding rod (31), and the air cavity (32) is communicated with the inside of the cover body (2).

6. The top sealing structure of a downdraft biomass gasifier according to claim 5, characterized in that, A plurality of rotating grooves (33) arranged in a linear array are formed in the sliding rod (31), and a guide sliding rod (331) is arranged on the rotating groove (33).

7. The top sealing structure of a downdraft biomass gasifier according to claim 6, characterized in that, It includes a furnace body (1). A fixing groove (35) is formed at the end of the sliding rod (31), and the fixing groove (35) cooperates with an insertion rod (34) arranged at the end of the furnace body (1).

8. The sealing structure at the top of the furnace of a downdraft biomass gasifier according to claim 1, characterized in that, The elastic member (29) is a spring.

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