CN210291122U - Arc-shaped plate retractable adjustable shrinkage cavity for primary air pipe of coal-fired power plant - Google Patents
Arc-shaped plate retractable adjustable shrinkage cavity for primary air pipe of coal-fired power plant Download PDFInfo
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- CN210291122U CN210291122U CN201920446860.6U CN201920446860U CN210291122U CN 210291122 U CN210291122 U CN 210291122U CN 201920446860 U CN201920446860 U CN 201920446860U CN 210291122 U CN210291122 U CN 210291122U
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Abstract
The utility model relates to an adjustable shrinkage cavity of arc pantographic formula for coal fired power plant's primary air pipe, for solving current shrinkage cavity adjustment bite scheduling problem. The utility model comprises a zoom type adjustable hole shrinkage mechanism and an actuating mechanism, wherein the zoom type adjustable hole shrinkage mechanism is positioned in a primary air pipe and is contacted with the actuating mechanism; the retractable adjustable shrinkage cavity mechanism comprises a lifting connecting rod, a triangular arc plate, a connecting buckle, a connecting rod, a sleeve and an adjusting cam; the actuating mechanism comprises a pulley, an A-side horizontal connecting rod, an A-side adjusting hand wheel, a B-side horizontal connecting rod, a B-side adjusting hand wheel and a sliding vehicle body; the utility model discloses a triangle arc, lift connecting rod and drive coaster constitute the adjustable shrinkage cavity of type of zooming, not only can realize good sealed and smooth and easy regulation, and throttle effect is gentle moreover, has eliminated the buggy and has gathered the district, has reduced the influence to the buggy homogeneity.
Description
Technical Field
The utility model relates to an adjustable shrinkage cavity of arc pantographic for coal fired power plant's primary air pipe.
Background
At present, a drawing and inserting type half-moon-shaped double-core adjustable shrinkage cavity is commonly adopted on a primary air pipe of a coal-fired power plant of a power station, if the Chinese patent with the application number of 201720757636.X is adopted, the shrinkage cavity has several defects, great difficulty is brought to the production and the operation of the power plant, the adjustment of primary air speed is influenced, throttling loss is caused, and the service life is shortened.
The main defects of the pull-plug type half-moon-shaped double-core adjustable shrinkage cavity are as follows: 1) the sealing structure is too simple, and pulverized coal in the pipe leaks out through a gap between the inserting plate and the valve body, so that the lead screw cannot rotate or the rotating mechanism is blocked, the adjusting resistance is positive or the adjusting function fails; 2) the half-moon-shaped adjustable shrinkage cavity has large throttling loss; 3) coal dust is easy to accumulate at the half-moon-shaped baffle plate, so that the coal dust is natural; 4) the half-moon-shaped baffle plate vertically flows into the air flow and is greatly scoured by the wind-powder air flow; 5) the uniformity of the distribution of the coal dust particles in the primary air is influenced, so that the concentration of the coal dust at the center is high, and the concentration of the coal dust at the periphery is low.
Therefore, it is necessary to develop a novel shrinkage cavity with good sealing, moderate throttling action, no coal powder accumulation area and small influence on the uniformity of coal powder, which not only can effectively solve the problem of shrinkage cavity adjustment jam, but also can reduce throttling loss and abrasion and ensure the uniformity of coal powder.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide an adjustable shrinkage cavity of arc pantography for coal fired power plant's primary air pipe, adopt triangle arc, lift connecting rod and drive coaster to constitute the adjustable shrinkage cavity of pantography, not only can realize good sealed and smooth and easy regulation, throttle effect moreover with slow, eliminate the buggy and gather the district, reduce the influence to the buggy homogeneity.
The utility model provides a technical scheme that above-mentioned problem adopted is: an arc-shaped plate zooming type adjustable shrinkage cavity for a primary air pipe of a coal-fired power plant comprises a zooming type adjustable shrinkage cavity mechanism and an actuating mechanism, wherein the zooming type adjustable shrinkage cavity mechanism is positioned in the primary air pipe and is in contact with the actuating mechanism; the adjustable hole shrinkage mechanism is characterized by comprising a lifting connecting rod, a triangular arc-shaped plate, a connecting buckle, a connecting rod, a sleeve and an adjusting cam, wherein the tip end of the triangular arc-shaped plate is connected with the upper end of the lifting connecting rod, the lower end of the lifting connecting rod is connected with the adjusting cam, one end of the connecting rod is connected with the connecting buckle, and the other end of the connecting rod is connected with the sleeve; the executing mechanism comprises a pulley, an A-side horizontal connecting rod, an A-side adjusting hand wheel, a B-side horizontal connecting rod, a B-side adjusting hand wheel and a sliding vehicle body, wherein the pulley is arranged at the bottom of the sliding vehicle body, an arc-shaped adjusting curved surface is arranged at the top of the sliding vehicle body, the A-side horizontal connecting rod and the B-side horizontal connecting rod are arranged on two sides of the sliding vehicle body along the horizontal direction, the A-side horizontal connecting rod is connected with the A-side adjusting hand wheel, and the B-side horizontal connecting rod is connected with the B-side adjusting hand wheel; the lifting connecting rod penetrates through the sleeve and passes through the limiting hole, and the adjusting cam is located on the arc-shaped adjusting curved surface.
Preferably, the triangular arc-shaped plate is of a fan-shaped structure with radian and is made of wear-resistant and high-temperature-resistant steel; the number of the triangular arc-shaped plates is 3-5, and the triangular arc-shaped plates are uniformly distributed.
Preferably, the horizontal connecting rod on the side A and the horizontal connecting rod on the side B are provided with scales for recording the horizontal position of the sliding vehicle body, adjusting the lifting of the lifting connecting rod and controlling the scaling of the triangular arc-shaped plate.
Preferably, the sleeve is fixed on the sealing groove through a fixing plate, and the limiting hole is located right below the sleeve.
Preferably, the bottom of the pulley is provided with a limiting slide way for sliding the vehicle body to move along the horizontal direction.
Preferably, the actuator is cylindrical, the housing of the actuator is made of wear-resistant and high-temperature-resistant materials, and the actuator is connected with the primary air pipe.
Preferably, the side A adjusting hand wheel or the side B adjusting hand wheel independently adjust the horizontal position of the sliding vehicle body.
The working process of the arc-shaped plate zoom type adjustable shrinkage cavity for the primary air pipe of the coal-fired power plant is as follows:
adjusting the position of the sliding vehicle body to enable the adjusting cam to be located at the lowest position of the arc-shaped adjusting curved surface, wherein the position of the lifting connecting rod is also at the lowest position, the unfolding angle of the triangular arc-shaped plate is the largest, and the triangular arc-shaped plate is almost in the horizontal direction;
step two, when the wind speed of the primary air pipe needs to be increased, adjusting the side A adjusting hand wheel or the side B adjusting hand wheel to enable the sliding vehicle body to move leftwards or rightwards, at the moment, the lifting connecting rod rises, the unfolding angle of the triangular arc-shaped plate is reduced, the flow area is increased, primary wind speed increase is achieved, and scales on the side A horizontal connecting rod or the side B horizontal connecting rod are used for measuring the size of the flow area;
and step three, when the wind speed of the primary wind pipe needs to be reduced, adjusting the side A adjusting hand wheel or the side B adjusting hand wheel to enable the sliding vehicle body to move towards the middle position, at the moment, the lifting connecting rod descends, the unfolding angle of the triangular arc-shaped plate is increased, the flow area is reduced, and primary wind speed reduction is achieved.
Compared with the prior art, the utility model, have following advantage and effect:
1) the utility model discloses a triangle arc, lift connecting rod and drive coaster constitute the adjustable shrinkage cavity of type of zooming, not only can realize good sealed and smooth and easy regulation, and throttle effect is gentle moreover, has eliminated the buggy and has gathered the district, has reduced the influence to the buggy homogeneity.
2) The utility model discloses utilize independent drive arrangement to carry out the shrinkage cavity and adjust, can prevent with the help of the seal groove that the buggy from getting into, the pulley can reduce the regulation resistance, and both sides horizontal connecting rod can adjust convenient operation respectively.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along the plane a-a in fig. 1.
In the figure: the device comprises a primary air duct 1, a retractable adjustable hole shrinkage mechanism 2, an actuating mechanism 3, a fixing plate 4, a limiting hole 5, a lifting connecting rod 21, a triangular arc-shaped plate 22, a connecting buckle 23, a connecting rod 24, a sleeve 25, an adjusting cam 26, an arc-shaped adjusting curved surface 31, a pulley 32, an A-side horizontal connecting rod 33, an A-side adjusting hand wheel 34, a B-side horizontal connecting rod 35, a B-side adjusting hand wheel 36, a sliding vehicle body 37, a sealing groove 38 and a limiting slide way 39.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 2, the arc-shaped plate retractable adjustable shrinkage cavity for a primary air pipe of a coal-fired power plant in the embodiment includes a retractable adjustable shrinkage cavity mechanism 2 and an actuating mechanism 3, the retractable adjustable shrinkage cavity mechanism 2 is located in the primary air pipe 1, and the retractable adjustable shrinkage cavity mechanism 2 is in contact with the actuating mechanism 3; the retractable adjustable shrinkage cavity mechanism 2 comprises a lifting connecting rod 21, a triangular arc-shaped plate 22, a connecting buckle 23, a connecting rod 24, a sleeve 25 and an adjusting cam 26, wherein the tip end of the triangular arc-shaped plate 22 is connected with the upper end of the lifting connecting rod 21, the lower end of the lifting connecting rod 21 is connected with the adjusting cam 26, one end of the connecting rod 24 is connected with the connecting buckle 23, and the other end of the connecting rod 24 is connected with the sleeve 25; the actuating mechanism 3 comprises a pulley 32, an A-side horizontal connecting rod 33, an A-side adjusting hand wheel 34, a B-side horizontal connecting rod 35, a B-side adjusting hand wheel 36 and a sliding vehicle body 37, the pulley 32 is arranged at the bottom of the sliding vehicle body 37, an arc-shaped adjusting curved surface 31 is arranged at the top of the sliding vehicle body 37, the A-side horizontal connecting rod 33 and the B-side horizontal connecting rod 35 are arranged on two sides of the sliding vehicle body 37 along the horizontal direction, the A-side horizontal connecting rod 33 is connected with the A-side adjusting hand wheel 34, and the B-side horizontal connecting rod 35 is connected with the B-side adjusting hand wheel 36; the lifting connecting rod 21 penetrates through the sleeve 25 and passes through the limiting hole 5, and the adjusting cam 26 is positioned on the circular arc-shaped adjusting curved surface 31.
In this embodiment, the triangular arc plate 22 is a fan-shaped structure with a radian and is made of wear-resistant and high-temperature-resistant steel; the number of the triangular arc-shaped plates 22 is 3-5, and the triangular arc-shaped plates 22 are uniformly distributed. The A-side horizontal connecting rod 33 and the B-side horizontal connecting rod 35 are provided with scales for recording the horizontal position of the sliding vehicle body 37, adjusting the lifting of the lifting connecting rod 21 and controlling the zooming of the triangular arc-shaped plate 22. The sleeve 25 is fixed on the sealing groove 38 through the fixing plate 4, and the limiting hole 5 is located right below the sleeve 25. The bottom of the pulley 32 is provided with a limit slide way 39 for sliding the vehicle body 37 to move along the horizontal direction. The actuator 3 is cylindrical, the shell of the actuator is made of wear-resistant and high-temperature-resistant materials, and the actuator 3 is connected with the primary air pipe 1. The A-side adjusting hand wheel 34 or the B-side adjusting hand wheel 36 independently adjust the horizontal position of the sliding vehicle body 37.
The working process of the arc-shaped plate retractable adjustable shrinkage cavity for the primary air pipe of the coal-fired power plant is as follows:
step one, adjusting the position of the sliding vehicle body 37 to enable the adjusting cam 26 to be located at the lowest position of the circular arc adjusting curved surface 31, wherein the position of the lifting connecting rod 21 is also at the lowest position, and the unfolding angle of the triangular arc plate 22 is the largest and almost in the horizontal direction;
step two, when the wind speed of the primary wind pipe 1 needs to be increased, the adjusting hand wheel 34 on the side A or the adjusting hand wheel 36 on the side B is adjusted to enable the sliding vehicle body 37 to move leftwards or rightwards, at the moment, the lifting connecting rod 21 rises, the unfolding angle of the triangular arc-shaped plate 22 is reduced, the flow area is increased, the primary wind speed is increased, and the scales on the horizontal connecting rod 33 on the side A or the horizontal connecting rod 35 on the side B are used for measuring the size of the flow area;
and step three, when the wind speed of the primary wind pipe 1 needs to be reduced, adjusting the side A adjusting hand wheel 34 or the side B adjusting hand wheel 36 to enable the sliding vehicle body 37 to run towards the middle position, at the moment, the lifting connecting rod 21 descends, the unfolding angle of the triangular arc-shaped plate 22 is increased, the flow area is reduced, and the primary wind speed is reduced.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (6)
1. The arc-shaped plate retractable adjustable shrinkage cavity for the primary air pipe of the coal-fired power plant comprises a retractable adjustable shrinkage cavity mechanism (2) and an actuating mechanism (3), wherein the retractable adjustable shrinkage cavity mechanism (2) is positioned in the primary air pipe (1), and the retractable adjustable shrinkage cavity mechanism (2) is in contact with the actuating mechanism (3); the adjustable hole shrinkage mechanism is characterized in that the adjustable hole shrinkage mechanism (2) comprises a lifting connecting rod (21), a triangular arc-shaped plate (22), a connecting buckle (23), a connecting rod (24), a sleeve (25) and an adjusting cam (26), the tip end of the triangular arc-shaped plate (22) is connected with the upper end of the lifting connecting rod (21), the lower end of the lifting connecting rod (21) is connected with the adjusting cam (26), one end of the connecting rod (24) is connected with the connecting buckle (23), and the other end of the connecting rod (24) is connected with the sleeve (25); the actuating mechanism (3) comprises a pulley (32), an A-side horizontal connecting rod (33), an A-side adjusting hand wheel (34), a B-side horizontal connecting rod (35), a B-side adjusting hand wheel (36) and a sliding vehicle body (37), wherein the pulley (32) is arranged at the bottom of the sliding vehicle body (37), an arc-shaped adjusting curved surface (31) is arranged at the top of the sliding vehicle body (37), the A-side horizontal connecting rod (33) and the B-side horizontal connecting rod (35) are arranged on two sides of the sliding vehicle body (37) along the horizontal direction, the A-side horizontal connecting rod (33) is connected with the A-side adjusting hand wheel (34), and the B-side horizontal connecting rod (35) is connected with the B-side adjusting hand wheel (36); the lifting connecting rod (21) penetrates through the sleeve (25) and passes through the limiting hole (5), and the adjusting cam (26) is located on the circular arc-shaped adjusting curved surface (31).
2. The retractable hole of the arc-shaped plate for the primary air pipe of the coal-fired power plant as recited in claim 1, wherein the triangular arc-shaped plate (22) is of a fan-shaped structure with a radian and is made of wear-resistant and high-temperature-resistant steel; the number of the triangular arc-shaped plates (22) is 3-5, and the triangular arc-shaped plates (22) are uniformly distributed.
3. The curved plate retractable adjustable shrinkage cavity for a primary air duct of a coal-fired power plant according to claim 1, wherein the horizontal connecting rod (33) at the A side and the horizontal connecting rod (35) at the B side are provided with scales for recording the horizontal position of the sliding vehicle body (37), adjusting the lifting of the lifting connecting rod (21) and controlling the retraction of the triangular curved plate (22).
4. The arc-shaped plate retractable adjustable hole for the primary air pipe of the coal-fired power plant according to claim 1, wherein the sleeve (25) is fixed on the sealing groove (38) through a fixing plate (4), and the limiting hole (5) is located right below the sleeve (25).
5. The curved plate retractable adjustable hole for a primary air duct of a coal-fired power plant according to claim 1, characterized in that the bottom of the pulley (32) is provided with a limit slide (39) for sliding the vehicle body (37) to move in a horizontal direction.
6. The curved plate retractable adjustable shrinkage cavity for a primary air pipe of a coal-fired power plant according to claim 1, wherein the actuator (3) is cylindrical in shape, the housing of the actuator is made of wear-resistant and high-temperature-resistant materials, and the actuator (3) is connected with the primary air pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920446860.6U CN210291122U (en) | 2019-04-03 | 2019-04-03 | Arc-shaped plate retractable adjustable shrinkage cavity for primary air pipe of coal-fired power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920446860.6U CN210291122U (en) | 2019-04-03 | 2019-04-03 | Arc-shaped plate retractable adjustable shrinkage cavity for primary air pipe of coal-fired power plant |
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| CN210291122U true CN210291122U (en) | 2020-04-10 |
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| CN201920446860.6U Active CN210291122U (en) | 2019-04-03 | 2019-04-03 | Arc-shaped plate retractable adjustable shrinkage cavity for primary air pipe of coal-fired power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056736A (en) * | 2019-04-03 | 2019-07-26 | 华电电力科学研究院有限公司 | A kind of arc panel pantographic adjustable contraction and its working method for coal-burning power plant's primary air piping |
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- 2019-04-03 CN CN201920446860.6U patent/CN210291122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056736A (en) * | 2019-04-03 | 2019-07-26 | 华电电力科学研究院有限公司 | A kind of arc panel pantographic adjustable contraction and its working method for coal-burning power plant's primary air piping |
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