JP2008168211A - Chain cover with eaves for grease exhaustion countermeasure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress deterioration or flow loss of grease charged into a chain wheel by reducing intrusion of wind and rain or radiation of sunshine to the inside of the chain cover. <P>SOLUTION: An eaves part for thin plate-like opening part (26) extending toward a discharge electrode hammering speed reducer side is provided at an opening part (24) formed at the chain cover for penetrating a rotary shaft of the speed reducer therethrough. For example, the opening part eaves comprises a strip-like eaves part (26a) and a plurality of leg parts (26b) juxtaposedly extending from one long side of the eaves part. The eaves part has prescribed flexibility, and the leg part is magnetized. The eaves part is folded to form a right angle in relation to the leg part, and magnetized and curved along the form of the opening part and attached to the opening part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chain cover with a tack for preventing grease breakage for preventing deterioration or reduction of grease for facilitating the movement of a chain wheel or the like housed inside the chain cover, and is particularly provided in a power plant or the like. The present invention relates to a technique for suppressing rain intrusion and direct sunlight from an opening formed in a chain cover that covers a chain for transmitting a rotational force of a rotary shaft of a radiation reducer to a discharge electrode striking device.

  Combustion ash generated in boilers of large-scale facilities such as power plants is introduced into the electrostatic precipitator through a denitration device and an air preheater together with the combustion exhaust gas. The electrostatic precipitator electrostatically collects most of the dust such as EP ash. It is captured by the collector electrode by attractive force. The dust adhering to the collector electrode of the electric dust collector is periodically removed by striking the discharge electrode striking device for releasing the dust by vibration. The dust released from the collecting electrode falls, accumulates in a hopper provided below, and is transferred to the ash treatment device through the ash transfer pipe by suction of a vacuum pump.

As an example of the invention related to the discharge electrode striking device, techniques such as “electric dust collector” in the following patent document have been proposed.
JP-A-11-212493

  FIG. 8 is a conceptual diagram showing the configuration of the discharge electrode striking device. As shown in the figure, the drive of the discharge electrode striking device is performed by decelerating the rotational power of the motor 16 with a speed reducer (radial speed reducer 18), and a chain wheel 41a which is a gear attached to the rotation shaft of the speed reducer. Is transmitted to the chain wheel 41 b of the discharge electrode striking device main body 14 connected via the chain 21. Two chain wheels are attached to the rotating shaft of one decelerator, and two discharge electrode striking devices arranged on the left and right of the decelerator are driven by one motor. In general, the motor and the speed reducer are installed outdoors such as on the roof of the facility.

Here, the chain 21 (broken line) that connects the chain wheel 41a of the rotary shaft of the release speed reducer 18 to the chain wheel 41b of the discharge electrode striking device main body 14 has a length of about 1 to several meters. The chain is covered with a chain cover 22 indicated by a broken line so as to cover the chain from the viewpoint of ensuring the safety of workers and protecting the chain from wind and rain.
The chain cover 22 is formed by bending a metal plate into a U shape so that the bottom surface of the chain cover 22 is open, and one side surface of the chain cover 22 penetrates the rotating shaft of the decelerator. An inverted U-shaped opening 24 is formed.

  As shown in the figure, a relatively wide gap exists between the peripheral edge of the opening of the chain cover and the rotary shaft of the decelerator. This is because it is necessary to penetrate the rotary shaft of the decelerator with the chain wheel attached during assembly. Since the motor, chain cover, etc. are installed outdoors, wind and rain enter the chain cover through the gap in the opening of the chain cover, and direct sunlight illuminates, facilitating the engagement between the chain and the chain wheel. In some cases, the lubricated grease deteriorates or is washed away. When grease deterioration or the like occurs, metal wear occurs on the chain and the chain wheel, and when this progresses, the chain may be broken or the gear teeth may be lost. Further, since the gap of the opening portion of the chain cover is near the meshing portion between the chain and the chain wheel, there is a possibility that a hand inserted from here into the chain cover is caught.

  The present invention has been devised to solve the above-mentioned problems, and intrusion of wind and rain into the chain cover or direct sunlight is irradiated from the gap between the opening of the chain cover and the rotary shaft of the decelerator. To provide a chain cover with a hook for preventing grease breakage to reduce the deterioration and loss of grease lubricated to the chain wheel, and to prevent entrainment accidents by making it difficult to insert a hand through the gap With the goal.

  In order to achieve the above object, the present invention is configured to strike and release the debris reducer (18) for decelerating the rotational power of the motor (16) and the dust adhering to the dust collecting electrode of the electric dust collector. A chain cover (22) for connecting the discharge electrode striking device (14) to a chain (21) for transmitting the rotational force, and covering the chain so as to cover the chain. Measures against grease breakage, characterized in that a thin plate-shaped opening 庇 (26) extending toward the decelerator is provided in the opening (24) formed to penetrate the rotary shaft of the 槌 reducer Providing chain covers with hooks.

  Here, the opening ridge (26) is composed of a strip-shaped ridge (26a) and a plurality of legs (26b) extending from one long side of the ridge, and the ridge is predetermined. The leg portion is magnetic, the flange portion is bent at right angles to the leg portion, and conforms to the shape of the opening (24). The leg portion is attached to the opening by being magnetically attached to the opening, or the opening ridge (26) is aligned with a strip-shaped ridge (26a) extending from one long side of the ridge. A clamp portion (26c), and the flange portion has a predetermined flexibility, and the clamp is formed to grip a peripheral edge of the opening portion (24). And bent to form a right angle with respect to the portion and curved so as to follow the shape of the opening. It is attached to the part.

  It is also preferable to form a peripheral edge (28) for preventing raindrops from dropping from the tip of the opening ridge (26).

  Furthermore, it is also preferable to stretch a flat belt-like rubber band (32) so as to border the tip of the opening ridge (26) and to protrude from the tip of the opening ridge.

  In the present invention, the opening formed in the chain cover is provided with a thin plate-like opening 庇 that extends toward the decelerator, so that the clearance from the rotary shaft of the decelerator can be introduced into the chain cover. Invasion of wind and rain and direct sunlight can reduce irradiation. As a result, it is possible to suppress degradation and loss of the grease lubricated to the chain wheel, and to prevent an accident involving a hand from the gap.

  Here, by configuring the opening ridge so as to be detachable from the opening of the chain cover, the opening can be easily attached to the opening of the existing chain cover. In addition, if the attachment of the opening ridge is performed using a magnet or a clamp having a structure continuous from the ridge that becomes the ridge, the attachment can be facilitated with a simple structure.

  Also, if a peripheral edge is formed at the tip of the opening ridge, rain that has fallen on the ridge flows along the peripheral edge, so that dripping onto the motor side can be prevented.

  In addition, a flat rubber band extending from the tip of the opening 開口 is stretched so that the tip of the opening 庇 is bordered. Since it protrudes to the shaft side, the gap between the rotary shaft of the decelerator and reducer can be narrowed or eliminated, and intrusion of wind and rain into the chain cover and direct sunlight can reduce or prevent irradiation Can do. Even when the protruding rubber band comes into contact with the casing of the decelerator, the rubber band absorbs the vibration of the decelerator, so that the influence of the vibration on the chain cover can be avoided.

1 is a collector cover of an electrostatic precipitator (not shown) that captures dust of combustion ash generated in a boiler of a power plant or the like by electrostatic attraction. In order to drive the discharge electrode striking device main body 14 that releases the dust adhering to the surface by vibration caused by striking, it is attached so as to be covered with the chain 21. The chain 21 includes a chain wheel 41a provided on the rotation shaft of the decelerator 18 that reduces the rotational force of the motor 16 that is a power source, and two discharge electrode striking devices disposed on the left and right sides of the decelerator. The chain wheel 41b provided in each rotating shaft of the main body 14 is connected.
The chain cover 22 is formed in a U-shape with a horizontal cross section of 30 cm × 20 cm with the bottom open, and with a rust-proof coating so that its length is about 2 m. It is manufactured by bending a metal plate such as iron having a thickness of about 1 mm. In addition, an inverted U-shaped opening 24 having a radius of a curved portion of about 15 cm for penetrating the rotation shaft of the decelerator 18 is formed on one side wall of the intermediate portion.

The gist of the present invention is that the gap between the peripheral edge of the opening of the chain cover 22 that penetrates the rotation shaft of the decelerator 18 to which the chain wheel 41 is attached and the rotation shaft of the decelerator 18 enters the chain cover. A windshield (opening wall 26) is newly provided to prevent or prevent the invasion of wind and rain and direct sunlight.
A chain cover with a hook for preventing grease breakage according to the present invention will be described below with reference to the drawings.

  FIG. 2 shows a perspective view of the opening ridges attached to the chain cover 22 of the first embodiment.

This opening rod 26 is easily attached to the opening 24 of the existing chain cover 22 later, has a flexibility that can be bent by hand, and has a magnetic thickness of 0.5 mm. It is manufactured using a metal plate of a degree.
The opening ridge 26 includes a ridge portion 26a that becomes a ridge when attached to the chain cover 22, and a plurality of leg portions 26b that extend from one long side of the heel portion and are arranged in parallel with the one long side. The part 26a and the leg part 26b are integrally formed.

The collar portion 26a has the same length as that of the periphery of the opening of the chain cover 22 (about 70 cm), has a strip shape with a width of about 10 cm and a thickness of about 0.5 mm.
The leg part 26b is for attaching the collar part 26a to the chain cover 22, and extends from one long side of the collar part in a direction perpendicular to the long side. The leg portions 26b are rectangular plates of about 8 cm both vertically and horizontally, and a plurality (eight in this embodiment) of leg portions 26b are continuously arranged on one long side of the flange portion 26a.

As shown in FIG. 3, the opening rod 26 is attached to the chain cover as follows.
First, the opening portion 26 is bent so that the flange portion 26 a and the leg portion 26 b form a right angle, and then the flange portion 26 a is bent so as to follow the shape of the peripheral edge of the chain cover opening portion 24. At this time, in the curved portion, the plurality of leg portions 26b are fanned out. In this state, the leg 26b is magnetically attached along the peripheral shape of the chain cover opening 24. The leg portion 26b is preferably magnetically attached to the inner side surface of the chain cover 22, but can also be magnetically attached to the outer side surface.

  In this embodiment, since the collar part 26a and the leg part 26b are formed of a single thin plate, the collar part 26a can also have magnetism. For this reason, the length of the collar can be easily extended as appropriate by covering the collar 26a with a strip-shaped thin metal plate and magnetically attaching it as necessary.

  According to the chain cover with a hook for preventing grease breakage according to the present embodiment, to which the opening hook described above is attached, the hook can be easily attached along the opening of the chain cover. Intrusion of wind and rain from the gap between the reduction shaft and the direct sunlight can reduce irradiation. As a result, it is possible to suppress deterioration and loss of the grease lubricated to the chain wheel, and it is possible to prevent accidents involving hands from such gaps.

  FIG. 4 shows a perspective view of the opening ridge attached to the chain cover with a ridge for preventing grease breakage of Example 2.

The opening 26 is easily attached to the opening 24 of the existing chain cover 22 later, has a flexibility that can be bent by hand, and has a thickness of 0. It is manufactured using a metal plate of about 5 mm.
The opening ridge 26 includes a ridge portion 26a that becomes a ridge when attached to the chain cover 22, and a plurality of clamp portions 26c arranged on one long side of the ridge portion 26a. The flange portion and the clamp portion are integrated. Is formed.

Since the collar portion 26a has substantially the same configuration as that of the first embodiment, a redundant description is omitted, but a peripheral edge 28 of the ridge is formed by pressing at the tip portion.
The clamp portion 26c is formed by folding one long side of the collar portion 26a into three Z-shaped folds by pressing, and forms a rectangle having a length of about 8 cm both vertically and horizontally in the folded state. The eight clamp portions 26c are arranged along one long side of the flange portion 26a. The clamp part 26c formed by being folded back into the Z shape can insert the peripheral edge of the opening of the chain cover 22 from its end and grip it with an elastic force.

As shown in a cross-sectional view in FIG. 5, the opening rod 26 is attached to the chain cover as follows.
First, the opening ridge 26 is bent so that the ridge portion 26a and the clamp portion 26c form a right angle, and then the ridge portion 26a is bent so that it is slightly smaller than the shape of the peripheral edge of the chain cover opening 24. . At this time, the plurality of clamp portions 26c are fanned in the curved portion. In this state, by inserting the end of the clamp portion 26 c so as to press the periphery of the chain cover opening 24 and gripping the periphery of the opening, the opening flange 26 is attached to the chain cover opening 24.

  According to the chain cover with a hook for preventing grease breakage according to the present embodiment, to which the opening ridge described above is attached, the hook can be easily attached to the opening of the chain cover, and the grease is deteriorated as in the first embodiment. And runoff can be suppressed. Also, when it rains, raindrops flow down along the peripheral edge formed at the front end of the collar, so that dripping onto the motor side can be prevented.

  FIG. 6 shows a perspective view of the chain cover with a hook for preventing grease breakage according to the third embodiment.

  The opening ridge itself has substantially the same configuration as that of the second embodiment. However, the slit 26a is about 2 cm × 5 mm in length × width for stopping a rubber band 32 described below. Are formed at regular intervals.

  On the other hand, the rubber band 32 is a rubber flat band having a thickness of about 2 mm so that the width when stretched is about 10 cm and the length when stretched is the same as the length of the collar part 26a (about 70 cm). Is provided with a hook 45 for attaching the rubber band 32 at a position corresponding to the slit hole 43 formed in the opening ridge 26 when stretched.

  The rubber band 32 is attached to the opening ridge 26 so that the rubber band 32 borders the distal end portion of the flange portion 26a of the opening ridge and about half the width of the rubber band from the distal end portion of the flange portion 26a. This is done by protruding and hooking the hooks 45 sequentially in the slit holes 43 of the flanges 26a of the opening flanges 26 attached to the chain cover opening 24 so as to protrude. Note that, as shown in the cross-sectional view of FIG. 7, the rubber band 32 that protrudes from the distal end portion of the flange portion 26a is inclined so as to enter the radially inner side of the curvature from the distal end portion of the flange portion due to the tension. It will be.

According to the chain cover with a hook for preventing grease breakage according to the present embodiment, to which the opening ridge described above is attached, the rubber band that protrudes from the tip of the ridge extends between the periphery of the opening and the release speed reducer. Narrowing or closing the gap between them, it is possible to further reduce the intrusion of wind and rain and direct sunlight from the gap inside the chain cover, effectively preventing grease deterioration, loss of flow and accidents involving hands. be able to. Even when the rubber band comes into contact with the casing of the decelerator, the rubber band absorbs the vibration of the decelerator and the chain cover is not affected by the vibration.
Moreover, the structure of the opening ridge described above is simple, and the length of the opening ridge can be changed (cut) in the field according to the length of the periphery of the opening. Further, the opening rod can be easily bent in accordance with the shape of the opening at the site, which is convenient. Further, when the rubber band is deteriorated, the replacement can be performed very easily.

  The preferred embodiment of the chain cover with a hook for preventing grease breakage according to the present invention has been described above. Of course, any modification can be used without departing from the spirit of the present invention as long as it prevents the entry of wind and rain.

  As described above, the chain cover with a hook for preventing breakage of grease according to the present invention was conceived mainly for use as a chain cover of a discharge electrode striking device provided in a power plant or the like. If it aims at suppressing the invasion of rain from an opening part and the direct sunlight of providing sunlight, it can be used for various facilities.

It is a block diagram of a discharge electrode striking device provided with a chain cover with a hook for preventing grease breakage. It is a perspective view of the opening part collar of the chain cover of Example 1. FIG. It is the perspective view which showed the mode of attachment of the opening heel. It is a perspective view of the opening part collar of the chain cover of Example 2. FIG. It is the perspective view which showed the mode of attachment of the opening heel. It is a perspective view of the chain cover of Example 3, and shows the mode of attachment of the rubber band to the opening ridge. It is a cross-sectional view of a chain cover to which a rubber band is attached. It is a block diagram of the conventional discharge electrode striking device.

Explanation of symbols

14 Discharge electrode striking device 16 Motor 18 Radiation reducer 21 Chain 22 Chain cover 24 Opening 26 Opening reed 26a Reed 26b Leg 26c Clamping part 28 Around edge 32 Rubber bands 41a, 41b Chain wheel 43 Slit hole 45 Hook

Claims (5)

A decelerator (18) for decelerating the rotational power of the motor (16), a discharge electrode striking device (14) for striking and releasing dust adhering to the dust collecting electrode of the electric dust collector, A chain cover (22) for covering the chain with a chain (21) for transmitting a rotational force by connecting
A thin plate-shaped opening 庇 (26) extending toward the decelerator is provided in the opening (24) formed for penetrating the rotary shaft of the decelerator in the chain cover. A chain cover with a hook for preventing grease breakage. The opening ridge (26) includes a strip-shaped ridge (26a) and a plurality of legs (26b) arranged extending from one long side of the ridge,
The buttocks have a predetermined flexibility, and the legs are magnetic.
The flange portion is bent so as to form a right angle with respect to the leg portion, and is bent so as to conform to the shape of the opening (24), and the leg portion is attached by being magnetically attached to the opening portion. The chain cover with a hook for preventing grease breakage according to claim 1. The opening ridge (26) comprises a strip-shaped ridge (26a) and a clamp portion (26c) arranged extending from one long side of the ridge,
The collar portion has a predetermined flexibility, and the clamp is formed to grip a peripheral edge of the opening (24),
The said collar part is bent so that it may make a right angle with respect to the said clamp part, and it may be bent so that the shape of the said opening part may be followed, and it may be attached to the said opening part. Chain cover with a hook for preventing grease breakage.   The peripheral edge (28) for preventing the dripping of the raindrop from a front-end | tip part is formed in the front-end | tip part of the said opening part ridge (26), The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Chain cover with a hook for preventing grease breakage as described in 1.   2. A flat belt-like rubber band (32) is stretched so as to border the tip of the opening ridge (26) and to protrude from the tip of the opening ridge. 5. A chain cover with a hook for preventing grease breakage according to any one of claims 1 to 4.

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