Small-size motor shaft head protection device for power plant disc turning

Abstract

The application discloses a small-size motor shaft head protection device for a thermal power plant, and relates to the technical field of thermal power plant equipment protection. The technical points are as follows: the device comprises a first body and a second body, one end of the first body is fixedly installed with a protection shell at the tail of a motor, and the size of the first body satisfies that the first body can wrap the exposed shaft head at the tail of the motor after being fixed with the protection shell at the tail of the motor; one opposite side of the second body is connected with the first body through a hinge and a fastener. The first body and the second body of the application can protect the exposed shaft head of the motor, reduce the safety hazards or safety accidents caused by the exposed shaft head at the tail of the motor, and avoid economic losses and adverse effects.

Description

Technical Field

[0001] This application relates to the field of equipment protection technology for thermal power plants, and in particular to a protective device for the axle head of a small-sized motor turning gear in a thermal power plant. Background Technology

[0002] During the production and operation of thermal power plants, such as Figure 1 As shown, some motors installed in certain equipment require a portion of their shaft to extend beyond their tail end for manual rotation when necessary. However, in daily operations, power plant workers need to walk around the motors for inspections and operations. If the motor suddenly starts running when personnel are nearby, the exposed shaft will rotate at high speed, easily causing injury to passersby and posing a significant threat to their personal safety. This also seriously impacts the safe production of thermal power plants. Utility Model Content

[0003] This application provides a protective device for the shaft end of a small-sized motor turning gear in a thermal power plant, which can effectively solve the safety hazard problem of exposed motor tail shaft end mentioned in the background art.

[0004] The above-mentioned objective of this application is achieved through the following technical solution: A protective device for the axle head of a small-sized motor turning gear in a thermal power plant includes a first body and a second body. The interior of the first body is hollow, and both ends of the first body are open. One end of the first body can be fixedly installed with the protective shell at the tail of the motor, and the size of the first body is such that after it is fixed with the protective shell at the tail of the motor, it can wrap the exposed shaft end at the tail of the motor. The cross-sectional shape of the second body is the same as the port shape of the first body at the end furthest from the motor tail. One opposite side of the second body is connected to the first body via a hinge and a fastener.

[0005] Furthermore, the first body includes a hyperbolic sleeve, and one port of the hyperbolic sleeve is provided with a plurality of reserved bolt holes on its periphery. The number of reserved bolt holes is the same as the bolt hole specifications of the fixing bolts of the fan cover at the tail of the motor.

[0006] Furthermore, the second body is a circular protective mesh cover.

[0007] Furthermore, one of the blades of the hinge is fixedly connected to the edge of the second body, and the other blade of the hinge is fixedly connected to the lower side wall of the hyperbolic sleeve.

[0008] Furthermore, the fastener includes a fixed buckle body and a fixed buckle hook. The fixed buckle body is fixedly installed on the second body, and the fixed buckle hook is fixedly installed on the first body on the side opposite to the hinge.

[0009] Furthermore, the mesh portion of the second body is formed by bending galvanized steel wire mesh.

[0010] Furthermore, the dimensions of the first body satisfy the requirement that after the second body is closed on it, the distance between the turning shaft head at the tail of the motor and the inner wall of the second body is not less than 10mm.

[0011] In summary, this application includes at least one of the following beneficial technical effects: After the first body of this application is installed on the tail housing of the motor, the opening at the end of the first body furthest from the motor can be quickly closed using fasteners. In this state, the first and second bodies can protect the rear turning shaft head, thus achieving the protection function of the exposed motor shaft head. When manual turning is required, the operator can open the fasteners to separate the second and first bodies, exposing the turning shaft head at the motor tail again. Subsequently, the worker can put the turning tool on the shaft head and begin manual turning according to the normal turning procedure. Therefore, the protective device of this application will not significantly affect the normal turning operation during use. Because the protective device of this application can isolate small-sized motors in thermal power plants from the external environment when turning is not required, it can reduce the safety hazards or accidents caused by the exposed motor tail shaft head, avoiding economic losses and adverse effects. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a structural diagram of a small-sized motor with turning gear function commonly found in thermal power plants in existing technologies; Figure 2 This is a schematic diagram of the structure of the first body of this application; Figure 3 This is a schematic diagram of the structure of the second body of this application; Figure 4 The protective device of this application is in Figure 1 State diagram when the motor is in use.

[0014] Reference numerals in the attached drawings: 1. First body; 101. Hyperbolic sleeve; 102. Reserved bolt hole; 2. Second body; 3. Motor; 4. Shaft head; 5. Hinge; 6. Fastener; 61. Fixed buckle body; 62. Fixed buckle hook. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0016] like Figures 1-4 As shown, this application discloses a small-sized motor turning head protection device for thermal power plants, comprising a first body 1 and a second body 2. The first body 1 has a hollow internal structure, with both ends of the first body 1 being open. One end of the first body 1 can be fixedly installed with the protective shell at the tail of the motor 3, and the size of the first body 1 is such that after being fixed with the protective shell at the tail of the motor 3, it can enclose the exposed shaft head 4 at the tail of the motor 3. The cross-sectional shape of the second body 2 is the same as the shape of the port of the first body 1 away from the tail of the motor 3. One opposite side of the second body 2 is connected to the first body 1 by a hinge 5 and a fastener 6, respectively.

[0017] In the above embodiments, after the first body 1 of this application is fixedly installed on the tail housing of the motor 3, a protective cover can be formed on the outside of the turning shaft head 4 at the tail of the motor 3. Both ends of the first body 1 are open structures. One open end can be used to assemble on the tail housing of the small-sized motor 3, and the other open end can be assembled with the second body 2 through the hinge 5 and the fastener 6. The fastener 6 is a connecting part that can be freely disassembled as needed. For example, when turning is not required, the fastener 6 can be used to lock the second body 2 at the open end of the first body 1 away from the motor 3. In this state, the first body 1 and the second body 2 can protect the turning shaft head 4 at the tail, thereby realizing the protection function of the exposed shaft head 4 of the motor 3. When manual turning is required, the operator can open the fastener 6 to separate the second body 2 and the first body 1, so that the turning shaft head 4 at the tail of the motor 3 is exposed again. Subsequently, the worker puts the turning tool on the shaft head 4 and can start manual turning according to the normal turning process. Therefore, the protective device of this application will not have an excessive impact on the normal turning operation when in use. Because the protective device of this application can isolate the small-sized motor 3 in the thermal power plant from the external environment when it does not need to be rotated, this can reduce the safety hazards or accidents caused by the exposed tail shaft 4 of the motor 3, and avoid economic losses and adverse effects.

[0018] Furthermore, such as Figure 2 and Figure 4 As shown, the first body 1 includes a hyperbolic sleeve 101. One of the ports of the hyperbolic sleeve 101 is provided with a plurality of reserved bolt holes 102. The number of reserved bolt holes 102 is the same as the bolt hole specifications of the fixing bolts of the fan cover at the tail of the motor 3.

[0019] In the above embodiments, the hyperbolic sleeve 101 is a variable diameter sleeve structure that gradually converges from both ends to the middle (the inner diameter of the front and rear ends of the hyperbolic sleeve 101 can be the same as the overall diameter of the motor 3, or the rear opening can be made slightly larger during manufacturing, so that after the second body 2 is opened later, it is convenient for the staff to perform a turning operation on the turning shaft head 4 inside the hyperbolic sleeve 101). Its front end inner diameter is 1-2mm larger than the original tail outer diameter of the motor 3. Several reserved bolt holes 102 are circumferentially opened at the front end of the hyperbolic sleeve 101. The specific number, diameter and position of the reserved bolt holes 102 match the number and specifications of the bolt holes used for fixing bolts on the original fan cover at the tail of the motor 3. During installation, first, place the front end of the hyperbolic sleeve 101 on the outside of the shaft head 4 at the tail of the motor 3, and continue pushing it towards the tail of the motor 3. After the front end of the hyperbolic sleeve 101 is in contact with the cooling fan housing in the protective shell at the tail of the motor 3, adjust the position of the hyperbolic sleeve 101 so that the reserved bolt holes 102 on the hyperbolic sleeve 101 are aligned with the bolt holes on the cooling fan housing. Then, referring to the original installation method of the cooling fan housing, fix the hyperbolic sleeve 101 and the fan housing of the motor 3 together to the motor 3 with fixing bolts.

[0020] The hyperbolic sleeve 101 can be manufactured by pressing thin metal sheets into shape, resulting in a simple and convenient one-piece molding structure that reduces production costs and facilitates mass production. The steel plate thickness is 1.5-2mm, providing excellent rust resistance and structural strength. This ensures sufficient strength to prevent personnel from contacting the turning gear shaft head 4, while also adapting to the humid and dusty working environment of thermal power plants, extending the service life of the equipment.

[0021] The overall length of the hyperbolic sleeve 101 is sufficient to completely cover the exposed shaft head 4 at the tail of the motor 3 after it is fixed to the tail of the motor 3, thus providing protection for the shaft head 4 during use. The length of the hyperbolic sleeve 101 should be at least equal to the original length of the shaft head 4 extending from the tail of the motor 3 plus 20-30mm to ensure that the shaft head 4 is completely enclosed and to prevent the shaft head 4 from being exposed at both ends, which could cause safety hazards.

[0022] During normal operation of motor 3, the added hyperbolic sleeve 101, due to its hyperbolic design, is not only aesthetically pleasing and structurally more stable, but also effectively reduces wind resistance and enhances natural ventilation. This design allows air to enter the fan heat sink more smoothly for heat exchange, thereby improving cooling efficiency. Furthermore, such as Figure 3 As shown, the second body 2 is a circular protective mesh cover.

[0023] In the above embodiments, the overall diameter of the second body 2 is similar to the diameter of the end port of the hyperbolic sleeve 101 without the reserved bolt hole 102. The circular protective net cover has ventilation holes. In this way, after the second body 2 and the hyperbolic sleeve 101 in the first body 1 are fastened together, the protective net cover can effectively block the staff and prevent them from contacting the rotating shaft head 4 when the motor 3 is rotating at high speed, and can also ensure smooth air circulation and avoid the setting of the second body 2 from affecting the heat dissipation of the motor 3.

[0024] Furthermore, such as Figure 3 and Figure 4 As shown, one of the blades of the hinge 5 is fixedly connected to the edge of the second body 2, and the other blade of the hinge 5 is fixedly connected to the lower side wall of the hyperbolic sleeve 101.

[0025] In the above embodiments, the movable hinge 5 is preferably a two-piece hinge made of stainless steel, with a hinge shaft diameter of 5-6mm. The installation method of the two pages in the hinge 5 can be found in the above description. For ease of procurement and use, the hinge 5 is preferably a standard part available in the market. The specific selection of the hinge 5 should ensure that the second body 2 (i.e., the protective mesh cover) can be rotated without jamming after installation. This is basic common sense that those skilled in the art should possess when using the hinge 5, so the specific details will not be unclear to those skilled in the art even if not elaborated here. The use of the hinge 5 allows the second body 2 to rotate freely up and down around the hinge 5 shaft outside the first body 1 during use, facilitating the operation of opening and closing the second body 2 by workers.

[0026] Furthermore, such as Figures 2-4 As shown, the fastener 6 includes a fixed buckle body 61 and a fixed buckle hook 62. The fixed buckle body 61 is fixedly installed on the second body 2, and the fixed buckle hook 62 is fixedly installed on the first body 1 on the side opposite to the hinge 5.

[0027] In the above embodiments, the fastener 6 of this application is preferably a standard part available in the market, which facilitates procurement and use. Both the fixing buckle body 61 and the fixing buckle hook 62 are made of spring steel with a thickness of 2-3mm. The fixing buckle body 61 is generally L-shaped, with a portion facing the rear end of the hyperbolic sleeve 101. This side has a width of 8-10mm. The fixing buckle hook 62 has a length of 15-18mm, and its head is curved with a bending radius of 4-5mm, matching the width of the portion of the fixing buckle body 61 facing the rear end of the hyperbolic sleeve 101. This ensures that the fixing buckle hook 62 is firmly connected to the fixing buckle body 61 and is not easily detached.

[0028] Both have a certain degree of elastic deformation capability, which facilitates the insertion and release of the fixed buckle hook 62. After being snapped together, it can ensure that the second body 2 is firmly installed. When disassembling, the worker only needs to pry the fixed buckle body 61 outward, which is convenient to operate.

[0029] The main function of the fastener 6 in this application is to allow workers to freely choose the connection relationship between the first body 1 and the second body 2 as needed. Therefore, in addition to the commonly available snap-fit ​​structure, the fastener 6 in this application can also use common fastener structures, locking structures, and other connection structures. These structures can all be directly purchased from e-commerce and other channels. Therefore, even if the specific structure and usage method are not described in this application, it will not cause any unclear problems for those skilled in the art when implementing the solution of this application.

[0030] Furthermore, such as Figure 3 As shown, the mesh portion of the second body 2 is formed by bending galvanized steel wire mesh.

[0031] In the above embodiments, the second body 2 consists of two parts. One part is the outer contour, which can be made of galvanized steel plate, just like the hyperbolic sleeve 101. The steel plate thickness is 1-1.5mm, and the galvanized layer thickness is not less than 8μm. This type of material has good rust resistance, is suitable for the humid and dusty working environment of thermal power plants, and extends the service life of the device. The other part is the mesh part in the middle for air circulation. This part can be formed by bending galvanized steel wire mesh (the general structure is similar to common screens). The wire diameter is 2mm, and the mesh size is 15-20mm. It can effectively prevent personnel from contacting the rotating shaft head 4, while ensuring smooth air circulation and avoiding affecting the heat dissipation of the motor 3.

[0032] Furthermore, the dimensions of the first body 1 are such that after the second body 2 is closed on it, the distance between the turning shaft head 4 at the tail of the motor 3 and the inner wall of the second body 2 is not less than 10mm.

[0033] In the above embodiments, after the first body 1 and the second body 2 of this application are assembled together by fastener 6, the turning head 4 is completely wrapped in the protective space. The distance between the end of the head 4 and the inner wall of the mesh part of the second body 2 is not less than 10mm, which can avoid unnecessary collision between the head 4 and the second body 2 when the head 4 rotates.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A protective device for the axle head of a small-sized motor turning gear in a thermal power plant, characterized in that: It includes a first body (1) and a second body (2). The interior of the first body (1) is hollow, and both ends of the first body (1) are open. One end of the first body (1) can be fixedly installed with the protective shell at the tail of the motor (3), and the size of the first body (1) is such that after it is fixed with the protective shell at the tail of the motor (3), it can wrap the exposed shaft head (4) at the tail of the motor (3). The cross-sectional shape of the second body (2) is the same as the port shape of the first body (1) at the end away from the tail of the motor (3); One of the opposite sides of the second body (2) is connected to the first body (1) via a hinge (5) and a fastener (6).

2. The protective device for the axle head of a small-sized motor turning gear in a thermal power plant according to claim 1, characterized in that: The first body (1) includes a hyperbolic sleeve (101), and a plurality of reserved bolt holes (102) are provided on the periphery of one of the ports of the hyperbolic sleeve (101). The number of reserved bolt holes (102) is the same as the bolt hole specifications of the fan cover fixing bolt of the motor (3).

3. The protective device for the axle head of a small-sized motor turning gear in a thermal power plant according to claim 2, characterized in that: The second body (2) is a circular protective mesh cover.

4. The protective device for the axle head of a small-sized motor turning gear in a thermal power plant according to claim 3, characterized in that: One of the blades of the hinge (5) is fixedly connected to the edge of the second body (2), and the other blade of the hinge (5) is fixedly connected to the lower side wall of the hyperbolic sleeve (101).

5. The protective device for the axle head of a small-sized motor turning gear in a thermal power plant according to any one of claims 1 to 4, characterized in that: The fastener (6) includes a fixed buckle body (61) and a fixed buckle hook (62). The fixed buckle body (61) is fixedly installed on the second body (2), and the fixed buckle hook (62) is fixedly installed on the first body (1) on the side opposite to the hinge (5).

6. The protective device for the axle head of a small-sized motor turning gear in a thermal power plant according to claim 3, characterized in that: The mesh portion of the second body (2) is formed by bending galvanized steel wire mesh.

7. The protective device for the axle head of a small-sized motor turning gear in a thermal power plant according to any one of claims 1 to 4, characterized in that: The dimensions of the first body (1) satisfy that after the second body (2) is closed on it, the distance between the turning head (4) at the tail of the motor (3) and the inner wall of the second body (2) is not less than 10mm.

Images