Motor driven connector for lance withdrawal in soot blower

Abstract

The present invention relates to a motor drive connector that allows the lance to return by manually driving the motor when an error occurs in the soot blower and the lance does not return. The present embodiment is a motor drive connector for emergency withdrawal of the lance of the soot blower, comprising a head portion having an outer surface shaped like a bolt head and a bar-shaped connecting portion extending to one side of the head portion, and is composed of a pair of sub-connectors that are symmetrical to each other and divided in half along the axial direction. The head portion forms a fastening hole for fastening the pair of sub-connectors, and the connecting portion forms a shaft groove in the center. With the shaft of the drive motor inserted into the shaft groove, a screw fastens the pair of sub-connectors through the fastening hole and is simultaneously mounted on the shaft. The external rotational power transmitted to the head portion is configured to be transmitted to the shaft through the connecting portion.

Description

Technology Field

[0001] The present invention relates to a soot blower, and more specifically, to a motor drive connector that enables the lance to return by manually driving the motor when an error occurs in the soot blower and the lance does not return. Background Technology

[0002] Soot blowers are equipped in boilers of thermal power plants to remove soot generated during coal combustion. The soot blower removes soot accumulated in the pipes by injecting high-pressure steam (fluid) into the pipes through a lance inserted into the boiler. If deposits such as soot are not properly removed, the heat transfer rate decreases and airflow resistance increases, which can lower boiler efficiency; therefore, soot blowers are essential for power generation using coal.

[0003] Generally, a soot blower includes a power unit that generates power, a control unit that drives a lance using the power of the power unit, and a spray unit that sprays steam into a boiler according to the control of the control unit. Here, the power unit includes a drive motor driven by an external power source, the control unit includes a plurality of gear assemblies that control the driving of the spray unit, and the spray unit may include a lance tube and a spray nozzle.

[0004] A soot blower with the above configuration is inserted into the boiler as the lance tube advances by the drive of a drive motor, and removes soot by spraying steam through a spray nozzle while inserted into the boiler. In addition, after the soot removal process is completed, the lance tube must return to its original position (Home Position) by retracting.

[0005] However, since the boiler maintains high heat output and each component of the soot blower is continuously exposed to a high-temperature environment, various problems caused by high heat may occur. For example, a lance tube inserted into the boiler must return to its original position outside the boiler after steam injection, but there are often cases where the lance tube fails to return due to an error in the drive motor.

[0006] In this case, in conventional soot blowers, the operator manually returns the lance tube, but safety issues may arise due to the lance tube being placed in a high-temperature state, and there is also a problem of delaying the work time. Prior art literature

[0007] Korean Patent Publication No. 10-2016-0092274 The problem to be solved

[0008] The present invention is proposed to solve the above-mentioned problems and aims to provide a motor drive connector for emergency lance withdrawal that enables the lance tube to return to its original position by emergency driving the drive motor when the lance tube fails to return to its original position due to an error in the drive motor during the operation of the soot blower. means of solving the problem

[0009] The present embodiment for solving the above-mentioned problem is a motor drive connector for emergency withdrawal of a lance of a soot blower, comprising a head portion having an outer surface shaped like a bolt head and a bar-shaped connecting portion extending to one side of the head portion, and composed of a pair of sub-connectors that are symmetrically divided in half along the axial direction. The head portion forms a fastening hole for fastening the pair of sub-connectors, and the connecting portion forms a shaft groove in the center. With the shaft of the drive motor inserted into the shaft groove, a screw fastens the pair of sub-connectors through the fastening hole and is simultaneously mounted on the shaft, and is configured to transmit external rotational power transmitted to the head portion to the shaft through the connecting portion.

[0010] In addition, the above-mentioned fastening holes may be formed in multiple numbers along the axial direction.

[0011] In addition, the above connecting portion may be provided with a spike rib formed to protrude from the inner circumference of the shaft groove. Effects of the invention

[0012] The present invention allows the drive motor to be forcibly driven using an electric tool in the event that the lance tube cannot be removed from inside the boiler due to a drive motor error, thereby eliminating the risk of operation and enabling the lance tube to be quickly returned to its original position. Brief explanation of the drawing

[0013] FIG. 1 is a perspective view showing a state in which a motor driving connector for emergency lance withdrawal according to the present embodiment is connected to a driving motor. FIG. 2 is an exploded view showing the motor drive connector of FIG. 1. FIG. 3 is a cross-sectional view of the connection in the AA direction showing the motor drive connector of FIG. 1, FIG. 4 is a cross-sectional view of the connection in the BB direction showing the motor drive connector of FIG. 1, FIG. 5 is a process diagram showing the process of forcibly driving a motor using a motor driving connector according to the present embodiment. Specific details for implementing the invention

[0014] The technical problems achieved by the present invention and its implementation will be clarified by the preferred embodiments described below. Hereinafter, preferred embodiments of the present invention will be examined in detail with reference to the attached drawings.

[0015] It should be understood that the differences in the embodiments described below are not mutually exclusive. That is, without departing from the technical spirit and scope of the present invention, specific shapes, structures, and characteristics described may be implemented in other embodiments in relation to one embodiment, and the location or arrangement of individual components within each disclosed embodiment may be changed. Furthermore, similar reference numerals in the drawings refer to the same or similar functions across various aspects. Additionally, in the description of the present invention, expressions such as "up," "down," "first," "second," etc., indicate relative positions or order, and their technical significance is not limited to their literal meanings.

[0016] FIG. 1 is a perspective view showing a state in which a motor driving connector for emergency lance withdrawal according to the present embodiment is connected to a driving motor, FIG. 2 is an exploded view showing the motor driving connector of FIG. 1, FIG. 3 is a cross-sectional view of the connection in the AA direction showing the motor driving connector of FIG. 1, and FIG. 4 is a cross-sectional view of the connection in the BB direction showing the motor driving connector of FIG. 1.

[0017] As shown in FIG. 1, the motor drive connector (100) of the present embodiment is a device that is connected to the shaft (11) of a drive motor (10) provided in a soot blower to forcibly drive the drive motor (10), and functions as a connector connecting the drive motor (10) of the soot blower and a power tool (see 20 in FIG. 5). Generally, the drive motor (10) has a shaft (11) that forms a rotation axis in an outward direction where a cooling fan or a heat dissipation piece is provided, and the motor drive connector (100) is connected to the end of the exposed shaft (11).

[0018] Referring specifically to FIGS. 1 and 2, the motor drive connector (100) of the present embodiment is composed of a head portion (110) and a connecting portion (120) extending to one side of the head portion (110). The motor drive connector (100) is composed of a pair of sub-connectors (100a, 100b) that are symmetrical to each other and divided in half along the axial direction. Each sub-connector (100a, 100b) is joined to form a single connector by screw fastening through a fastening hole (111) formed in the head portion (110).

[0019] The head portion (110) is configured to be coupled with the power tool (20) to receive rotational power from the power tool (20), and its outer surface forms a polygonal structure. For example, when a pair of sub-connectors (100a, 100b) are coupled, the head portion (110) is configured so that its outer surface forms a hexagonal structure identical to the head of a bolt. Additionally, the head portion (110) is provided with fastening holes (111), and a screw (112) is fastened to each fastening hole (111). It is preferable that multiple fastening holes (111) be formed along the axial direction so that an unbiased contact force can be transmitted to the shaft (11) from the connecting portion (120).

[0020] The connecting part (120) is configured to insert the shaft (11) of the drive motor (10) to transmit rotational power to the shaft (11). For this purpose, the connecting part (120) is formed in a bar shape having a predetermined diameter and extends to one side of the head part (110), and a shaft groove (121) is formed in the center into which the shaft (11) can be inserted. Generally, since the outer surface of the shaft (11) is circular, the cross-section of the shaft groove (121) can be circular, corresponding to the outer surface of the shaft (11). That is, the connecting part (120) of each sub-connector (100a, 100b) forms a shaft groove (121) with a cross-section that is semicircular, and a circular shaft groove (121) is formed by the combination of each sub-connector (100a, 100b). The shaft groove (121) can be formed with a predetermined length along the axial direction.

[0021] The motor drive connector (100) configured as described above is fastened using a screw (112) after a pair of symmetrical sub-connectors (100a, 100b) are brought into close contact so that the end of the shaft (11) of the drive motor (10) is inserted into the shaft groove (121), as shown in FIG. 3. At this time, the inner surface of the connecting part (120) is strongly in close contact with the outer surface of the shaft (11) so that the rotational power of the motor drive connector (100) can be transmitted to the shaft (11).

[0022] In addition, spike ribs (122) may be formed on the inner surface of the shaft groove (121) so that the motor drive connector (100) does not slip along the outer surface of the shaft (11) and rotational power is completely transmitted. That is, as shown in FIG. 4, spike ribs (122) protruding inward are formed on the inner surface of the shaft groove (121). A plurality of spike ribs (122) may be formed at a predetermined interval along the circumferential direction and may have a predetermined length in the axial direction. Accordingly, when a pair of sub-connectors (100a, 100b) are connected, a plurality of spike ribs (122) press against the surface of the shaft (11), so that the rotational power of the motor drive connector (100) can be completely transmitted to the shaft (11).

[0023] FIG. 5 is a process diagram showing the process of forcibly driving a motor using a motor driving connector according to the present embodiment.

[0024] Referring to FIG. 5, a motor drive connector (100) is connected to the end of the shaft (11) of the drive motor (10) exposed to the outside of the cooling fan as in (a). At this time, a pair of sub-connectors (100a, 100b) are screw-fastened in close contact so that the shaft (11) of the drive motor (10) is inserted into the shaft groove (121). Subsequently, a protective cover (12) is attached as in (b) to maintain the drive motor (10) in its original state.

[0025] And, if an error occurs inside the soot blower and the lance tube does not return to its original position, the lance tube is returned to its original position using an external power tool (20), such as a drill, as in (c). That is, by driving the power tool (20) with the motor driving connector (100) attached to the power tool (20), the rotational power of the power tool (20) is transmitted to the driving motor (10) through the motor driving connector (100), and the driving motor (10) is forcibly driven so that the lance tube can return to its original position.

[0026] In this way, by pre-installing the motor drive connector (100) on the drive motor, if the lance tube cannot be removed from inside the boiler due to a malfunction of the drive motor, the drive motor can be forcibly driven using an electric tool, allowing the lance tube to be quickly returned to its original position without any risk of work or time delay.

[0027] As described above, exemplary embodiments of the present invention have been illustrated and described; however, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all taken into account and are included in the appended claims and do not depart from the true spirit and scope of the present invention. Explanation of the symbols

[0028] 10 : Drive motor 20 : Power tool 100 : Motor drive connector 110 : Head section 111: Fastening hole 112: Screw 120 : Connection part 121: Shaft groove 122: Spike rib

Claims

Claim 1 A motor drive connector for transmitting power of a power tool to a drive motor for emergency withdrawal of a soot blower lance, comprising a head portion having an outer surface shaped like a bolt head that receives rotational power of the power tool, and a bar-shaped connecting portion extending to one side of the head portion, and composed of a pair of sub-connectors that are symmetrically divided in half along the axial direction; wherein the head portion forms a fastening hole for fastening the pair of sub-connectors, and the connecting portion forms a shaft groove in the center, and while the shaft of the drive motor is inserted into the shaft groove, a screw fastens the pair of sub-connectors through the fastening hole and is simultaneously mounted on the shaft, and the connecting portion is provided with a spike rib formed to protrude from the inner surface of the shaft groove and press against the surface of the shaft, and configured to transmit external rotational power provided to the head portion to the shaft through the connecting portion. Claim 2 In claim 1, the fastening holes are formed in plurality along the axial direction, a motor-driven connector for emergency withdrawal of a soot blower lance. Claim 3 delete

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