A hand-held grinding device with a separating grinding disc for fine finishing of finished heat exchangers

Abstract

The present invention relates to a hand-held grinding device with a separating grinding disc for fine finishing of finished heat exchangers, including a machine body and a connecting seat. An electric telescopic rod is installed at the upper left end of the machine body, and a connecting rod is arranged at the end of the electric telescopic rod. An upper shielding mechanism is installed at the top of the connecting rod, and a grip is fixed in the middle of the left end of the machine body. The beneficial effects of the present invention are as follows: For the hand-held grinding device with a separating grinding disc for fine finishing of finished heat exchangers, through the engagement between the side box and the shielding cover, they can be assembled. At this time, it is convenient to use the shielding cover firmly and stably. The design of the box holes facilitates the leakage of the internal reagent and acts inside the shielding cover. Conversely, the shielding cover can be disassembled. At this time, lubricating and protecting reagents such as dry powder or machine oil can be added to the inside of the shielding cover to protect the end of the main body and provide a better environment during use, making it more stable during use. At the same time, the movement between the connecting ruler and the connecting seat can adjust their positions for adaptation.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and specifically to a handheld grinding device with a separable grinding disc for fine repair of heat exchanger finished products. Background Technique

[0002] Grinding is a kind of surface modification technology. Generally, it refers to a processing method that uses a rough object (such as sandpaper containing relatively hard particles) to change the physical properties of the material surface through friction. It is generally used in the processing of various devices during use. For example, in the processing of heat exchanger finished products, a handheld grinding device is generally used.

[0003] The existing grinding device is not reasonably designed at the end, resulting in poor stretching adjustment during use, inconvenient holding process, poor adaptability, resulting in poor safety performance and comfort during processing, and insufficient heat dissipation during processing, poor heat dissipation function, and poor adaptability regulation performance of the heat dissipation part to the environment. Summary of the Invention

[0004] The purpose of the present invention is to provide a handheld grinding device with a separable grinding disc for fine repair of heat exchanger finished products, so as to solve the problems in the above background technique that the existing grinding device is not reasonably designed at the end, resulting in poor stretching adjustment during use, inconvenient holding process, poor adaptability, resulting in poor safety performance and comfort during processing, and insufficient heat dissipation during processing, poor heat dissipation function, and poor adaptability regulation performance of the heat dissipation part to the environment.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A handheld grinding device with a separable grinding disc for fine repair of heat exchanger finished products, including a machine body and a connecting seat. An electric telescopic rod is installed at the upper left end of the machine body, and a connecting rod is arranged at the end of the electric telescopic rod. An upper shielding mechanism is installed at the top of the connecting rod. A grip is fixed in the middle of the left end of the machine body, and a connecting ruler passes through the end of the grip. The connecting seat is arranged on the outer side of the connecting ruler, and a side buckle is installed on the side of the connecting seat. A spring is arranged at the bottom end of the connecting seat. A lower protection mechanism is installed at the lower left end of the machine body. A pair of buckles and a pair of holding mechanisms are arranged on the front wall of the right end of the machine body.

[0006] Preferably, the upper shielding mechanism includes a shielding cover, an inner cover groove, a cover opening, a side box, and a box hole. An inner cover groove is opened at the inner side end of the shielding cover, a cover opening passes through the middle of the shielding cover, a side box is arranged at the side end of the inner cover groove, and a box hole is opened at the end of the side box.

[0007] Preferably, the shielding cover is rectangular, the vertical central axis of the shielding cover coincides with the vertical central axis of the cover opening, and the shielding cover and the machine body are mutually matched and clamped.

[0008] Preferably, the side boxes are symmetrically distributed about the center of the protective cover, and the box holes are equidistantly distributed about the ends of the side boxes, and the connecting ruler and the connecting seat cooperate with each other.

[0009] Preferably, the lower protection mechanism includes a lower cover, a cover shaft, a baffle, a hanging plate, a connecting spring and a baffle, and the end of the lower cover is provided with a cover shaft and a baffle, the end of the baffle is provided with a hanging plate, and a connecting spring is opened inside the bottom end of the hanging plate, and the end of the connecting spring is fixed with a baffle by welding.

[0010] Preferably, the lower cover and the connecting ruler are fixed to each other, and the connecting ruler is cylindrical, and the connecting seat and the side buckles are engaged with each other.

[0011] Preferably, the baffle is symmetrically distributed about the center of the lower cover, and the baffle rotates through the cooperation between the cover shaft and the lower cover. At the same time, the hanging plate is in the shape of a "mountain", and the hanging plate cooperates with the baffle buckle through the connecting spring to form an elastic structure.

[0012] Preferably, the holding mechanism includes a docking seat, a center handle, a lower seat, a lower buckle hole, a lower shaft, a base seat and a locking screw, and the bottom end of the docking seat is provided with a center handle, the bottom end wall of the center handle is fixed with the lower seat, and the end of the lower seat is provided with a lower buckle hole, the bottom end of the lower seat is provided with a lower shaft, and the bottom end of the lower shaft is installed with a base seat, and a locking screw is passed through the end wall of the base seat.

[0013] Preferably, the docking seat and the center handle are engaged with each other, and the lower seat cooperates with the locking screw through the lower buckle hole to form a threaded connection, and the lower seat rotates through the cooperation between the lower shaft and the base seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The rectangular shape of the shielding cover of the present invention can be engaged with the top of the main body, which makes docking safer and more stable. After the shielding cover and the main body are shielded, the top of the main body can be shielded. At this time, the main body can use the shielding cover to dissipate heat, and the heat dissipation performance is reduced. However, since the dense filter mesh of the cover is used for ventilation and heat dissipation, the filtering performance of the main body is greatly enhanced. When in use, the connecting rod can be driven by the electric telescopic rod of the existing technology to make it extend and retract, and the shielding cover moves in conjunction with it. After leaving the main body, the main body can use the large opening at its end to dissipate a large amount of heat. Conversely, the shielding cover can be engaged at the end of the main body, which is stable and safe to use.

[0016] 2. Through the engagement between the side box and the shielding cover, the present invention can assemble them. At this time, the shielding cover can be used conveniently, firmly and stably. The design of the box hole can facilitate the leakage of the internal reagent, acting inside the shielding cover. Conversely, the shielding cover can be disassembled. At this time, lubricating and protecting reagents such as dry powder or machine oil can be added inside the shielding cover to protect the end of the body, providing a better environment during use and making it more stable during use. At the same time, the activities between the connecting ruler and the connecting seat can adjust their positions for adaptation.

[0017] 3. Through the fixation between the connecting ruler and the lower cover, the present invention can facilitate their linkage use and be safer during use. The cylindrical structure of the connecting ruler can better cooperate with the connecting seat for rotational adjustment, which is more convenient during adjustment. At the same time, the engagement between the connecting seat and the side buckle can adjust the position of the bottom wall of the side buckle, making the bottom wall of the side buckle engage into the connecting seat and fit against the tooth-shaped outer wall of the connecting ruler, enabling bite positioning and making its controllability stronger during use.

[0018] 4. Through the movement adjustment of the lower cover, the lower cover can be rotated and pressed near the grinding disc of the body to shield the end of the grinding part and protect its end. The lower cover can rotate and flip the shielding plate through the cover shaft. When the shielding plate is turned outwards, the left and right sides of the lower cover can be opened. At this time, the shielding plate can be horizontally supported at the end of the grinding part of the body for shielding, protecting its end and making the shielding area larger and the adaptability better. At the same time, the elastic movement of the connecting spring can drive the shielding buckle to move elastically. When the shielding buckle and the end of the hanging plate move elastically to form a clamping area, the water pipe can be clamped for use, allowing the end to convey the cooling water pipe during grinding, which is convenient for better assembly and use.

[0019] 5. Through the engagement between the docking seat and the central handle, the present invention can assemble them. At this time, the internal hollow cavity of the docking seat can be connected to the hollow cavity of the central handle. When lime is added to the docking seat, it can flow into the central handle and leak out through the filter screen at the end of the central handle for utilization. At this time, when holding the central handle, simple drying and sweat-absorbing treatment can be carried out, effectively preventing slipping and maintaining a safe controllability during use. At the same time, the lower shaft can be rotated to turn the lower seat, making the lower buckle hole face the locking screw and rotating and locking it for positioning and firm use. The base seat can rotate with the body to adjust the direction. At this time, the movable pair buckle can be inserted and engaged with the side wall of the base seat to lock its orientation, making it firm and stable during use, having a two-way adjustment effect and providing a better flexible controllability and better adaptability when holding it. When using, the body can be held to grind the finished end of the heat exchanger. Description of the Drawings

[0020] Figure 1Schematic structural diagram of a handheld grinding device with a separable grinding disc for fine finishing of a finished heat exchanger of the present invention;

[0021] Figure 2 Front view structural diagram of the lower cover of a handheld grinding device with a separable grinding disc for fine finishing of a finished heat exchanger of the present invention;

[0022] Figure 3 Stereo structural diagram of the shielding cover of a handheld grinding device with a separable grinding disc for fine finishing of a finished heat exchanger of the present invention;

[0023] Figure 4 Front view structural diagram of the shielding plate of a handheld grinding device with a separable grinding disc for fine finishing of a finished heat exchanger of the present invention;

[0024] Figure 5 For a handheld grinding device with a separable grinding disc for fine finishing of a finished heat exchanger of the present invention Figure 1 Enlarged structural diagram at position A;

[0025] Figure 6 For a handheld grinding device with a separable grinding disc for fine finishing of a finished heat exchanger of the present invention Figure 1 Enlarged structural diagram at position B.

[0026] In the figure: 1, body; 2, electric telescopic rod; 3, connecting rod; 4, upper shielding mechanism; 5, shielding cover; 6, inner groove of the cover; 7, cover opening; 8, side box; 9, box hole; 10, connecting ruler; 11, connecting seat; 12, side buckle; 13, spring; 14, grip; 15, lower protection mechanism; 16, lower cover; 17, cover shaft; 18, shielding plate; 19, hanging plate; 20, connecting spring; 21, shielding buckle; 22, opposing buckle; 23, opposing holding mechanism; 24, docking seat; 25, central handle; 26, lower seat; 27, lower buckle hole; 28, lower shaft; 29, base fixing seat; 30, locking screw. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0028] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Please refer to Figures 1-6 , the present invention provides a technical solution: a hand-held grinding device with a separating grinding disc for fine finishing of heat exchanger finished products, including a machine body 1, an electric telescopic rod 2, a connecting rod 3, an upper shielding mechanism 4, a shielding cover 5, an inner groove 6 of the cover, a cover opening 7, a side box 8, a box hole 9, a connecting ruler 10, a connecting seat 11, a side buckle 12, a spring 13, a handle 14, a lower shielding mechanism 15, a lower cover 16, a cover shaft 17, a shielding plate 18, a hanging plate 19, a connecting spring 20, a shielding buckle 21, a pair of buckles 22, a pair of holding mechanisms 23, a docking seat 24, a central handle 25, a lower seat 26, a lower buckle hole 27, a lower shaft 28, a base fixing seat 29 and a locking screw 30. The electric telescopic rod 2 is installed at the upper left end of the machine body 1, and the end of the electric telescopic rod 2 is provided with a connecting rod 3. The upper shielding mechanism 4 is installed at the top of the connecting rod 3. The handle 14 is fixed in the middle of the left end of the machine body 1, and the connecting ruler 10 passes through the end of the handle 14. The connecting seat 11 is arranged at the outer end of the connecting ruler 10, and the side buckle 12 is installed at the side end of the connecting seat 11. The spring 13 is arranged at the bottom end of the connecting seat 11. The lower shielding mechanism 15 is installed at the lower left end of the machine body 1. The pair of buckles 22 and the pair of holding mechanisms 23 are arranged on the front wall of the right end of the machine body 1;

[0031] The upper shielding mechanism 4 includes a shielding cover 5, an inner cover groove 6, a cover opening 7, a side box 8 and a box hole 9. The inner side end of the shielding cover 5 is provided with the inner cover groove 6, the middle part of the shielding cover 5 is provided with the cover opening 7, the side end of the inner cover groove 6 is provided with the side box 8, and the end of the side box 8 is provided with the box hole 9. The shielding cover 5 is rectangular, and the vertical central axis of the shielding cover 5 coincides with the vertical central axis of the cover opening 7. Moreover, the shielding cover 5 and the machine body 1 are mutually engaged. Through the rectangular shape of the shielding cover 5, it can be engaged with the top of the main body, making the docking safer and more stable. After the shielding cover 5 and the main body are shielded, the top of the main body can be shielded. At this time, the main body can use the shielding cover 5 for heat dissipation, and the heat dissipation performance is reduced. However, since the dense filter screen of the cover opening 7 is used for breathable heat dissipation at this time, the filtering performance of the main body is greatly enhanced. When in use, the electric telescopic rod 2 of the existing technology can be used to drive the connecting rod 3 to expand and contract, and the shielding cover 5 can be linked to move. After leaving the main body, the main body can use the large opening at its own end for a large amount of heat dissipation. On the contrary, the shielding cover 5 can be clamped at the end of the main body for stable and safe use;

[0032] The side boxes 8 are symmetrically distributed about the center of the shielding cover 5, and the box holes 9 are equidistantly distributed about the end of the side box 8. At the same time, the connecting ruler 10 and the connecting seat 11 are mutually engaged and movable. Through the engagement between the side box 8 and the shielding cover 5, they can be assembled. At this time, the shielding cover 5 can be used conveniently, firmly and stably. The design of the box hole 9 can facilitate the leakage of the internal reagent into the shielding cover 5. On the contrary, the shielding cover 5 can be disassembled. At this time, lubricating protection reagents such as dry powder or engine oil can be added to the inside of the shielding cover 5 to protect the end of the main body and make it have a better environment when in use and be more stable during use. At the same time, the movement between the connecting ruler 10 and the connecting seat 11 can adjust their positions for adaptation;

[0033] The lower shielding mechanism 15 includes a lower cover 16, a cover shaft 17, a shielding plate 18, a suspension plate 19, a connecting spring 20 and a shielding buckle 21. The end of the lower cover 16 is provided with the cover shaft 17 and the shielding plate 18. The end of the shielding plate 18 is provided with the suspension plate 19, and the inner bottom end of the suspension plate 19 is provided with the connecting spring 20. The end of the connecting spring 20 is fixedly connected by welding with the shielding buckle 21. The lower cover 16 and the connecting ruler 10 are mutually fixed, and the connecting ruler 10 is cylindrical. At the same time, the connecting seat 11 and the side buckle 12 are mutually engaged. Through the fixation between the connecting ruler 10 and the lower cover 16, it is convenient for their linkage use and safer during use. The cylindrical structure of the connecting ruler 10 can better cooperate with the connecting seat 11 for rotation adjustment, which is more convenient during adjustment. At the same time, the engagement between the connecting seat 11 and the side buckle 12 can adjust the position of the bottom wall of the side buckle 12, so that the bottom wall of the side buckle 12 is clamped into the connecting seat 11 and fits with the toothed outer wall of the connecting ruler 10, which can perform bite positioning and make its controllability stronger during use;

[0034] The baffle 18 is symmetrically distributed about the center of the lower cover 16, and the baffle 18 rotates in cooperation with the lower cover 16 through the cover shaft 17. At the same time, the hanging plate 19 is in the shape of a Chinese character "shan", and the hanging plate 19 and the shielding buckle 21 cooperate with each other through the connecting spring 20 to form an elastic structure. Through the movement adjustment of the lower cover 16, the lower cover 16 can be rotated and pressed near the grinding disc of the body to shield the end of the grinding part and protect its end. The lower cover 16 can rotate and flip the baffle 18 through the cover shaft 17. When the baffle 18 is turned outwards, the left and right ends of the lower cover 16 can be opened. At this time, the baffle 18 can be horizontally supported on the end of the grinding part of the body for shielding and protecting its end, so that the shielding area is larger and the adaptability is better. At the same time, the elastic movement of the connecting spring 20 can drive the shielding buckle 21 to perform elastic activities. When the shielding buckle 21 and the end of the hanging plate 19 perform elastic activities to form a clamping area, the water pipe can be clamped and used to convey the cooling water pipe during grinding at its end, which is convenient for better assembly and use. When not in use, it can be adjusted to be separated from the grinding disc for storage, with stronger flexibility;

[0035] The holding mechanism 23 includes a docking seat 24, a central handle 25, a lower seat 26, a lower buckle hole 27, a lower shaft 28, a base seat 29 and a locking screw 30. The bottom end of the docking seat 24 is provided with a central handle 25. The bottom end wall of the central handle 25 is fixed with a lower seat 26, and a lower buckle hole 27 is opened at the end of the lower seat 26. The bottom end of the lower seat 26 is provided with a lower shaft 28, and the bottom end of the lower shaft 28 is installed with a base seat 29. The locking screw 30 is inserted through the end wall of the base seat 29. The docking seat 24 and the central handle 25 are engaged with each other. At the same time, the lower seat 26 and the locking screw 30 cooperate with each other through the lower buckle hole 27 to form a threaded connection, and the lower seat 26 rotates in cooperation with the base seat 29 through the lower shaft 28. Through the engagement between the docking seat 24 and the central handle 25, they can be assembled. At this time, the internal hollow cavity of the docking seat 24 can be communicated with the hollow cavity of the central handle 25. When lime is added to the docking seat 24, it can flow into the central handle 25 and leak out through the filter screen at the end of the central handle 25 for utilization. At this time, when holding the central handle 25, simple drying and sweat absorption treatment can be carried out, effectively preventing slipping and maintaining a safe controllability during use. At the same time, the lower shaft 28 can be rotated to turn the lower seat 26 so that the lower buckle hole 27 faces the locking screw 30 and is rotated and locked for positioning and firm use. The base seat 29 can rotate with the body to adjust the direction. At this time, the movable buckle 22 can be inserted and engaged with the side end wall of the base seat 29 to lock its orientation, making it firm and stable in use, having a two-way adjustment effect, having a better flexible controllability when holding it, better adaptability, and when in use, the body can be held to grind the end of the finished product of the heat exchanger.

[0036] In summary, for the handheld grinding device with a separating grinding disc for the fine finishing of the heat exchanger finished product, during use, due to the rectangular shape of the shielding cover 5, it can be engaged with the top of the main body, making the docking safer and more stable. After the shielding cover 5 and the main body are shielded, the top of the main body can be shielded. At this time, the main body can use the shielding cover 5 for heat dissipation, although the heat dissipation performance decreases. However, since the dense filter screen of the cover opening 7 is used for breathable heat dissipation at this time, the filtering performance of the main body is greatly enhanced. During use, the electric telescopic rod 2 of the existing technology can be used to drive the connecting rod 3 to expand and contract, and link the movement of the shielding cover 5. After leaving the main body, the main body can use the large opening at its end for a large amount of heat dissipation. Conversely, the shielding cover 5 can be engaged at the end of the main body for stable and safe use. Through the engagement between the side box 8 and the shielding cover 5, they can be assembled. At this time, it is convenient to use the shielding cover 5 firmly and stably. The design of the box hole 9 can facilitate the leakage of the internal reagent and act on the inside of the shielding cover 5. Conversely, the shielding cover 5 can be disassembled. At this time, lubricating and protecting reagents such as dry powder or machine oil can be added to the inside of the shielding cover 5 to protect the end of the main body and provide a better environment during use, making it more stable during use. At the same time, the movement between the connecting ruler 10 and the connecting seat 11 can adjust their positions for adaptation. Through the fixation between the connecting ruler 10 and the lower cover 16, it is convenient for their linkage use and safer during use. The cylindrical structure of the connecting ruler 10 can better cooperate with the connecting seat 11 for rotational adjustment, which is more convenient during adjustment. At the same time, the engagement between the connecting seat 11 and the side buckle 12 can adjust the position of the bottom wall of the side buckle 12, making the bottom wall of the side buckle 12 engage into the connecting seat 11 and fit with the toothed outer wall of the connecting ruler 10, enabling bite positioning and making its controllability during use stronger. Through the movement adjustment of the lower cover 16, the lower cover 16 can be rotated and pressed near the grinding disc of the main body to shield the end of the grinding part and protect its end. The lower cover 16 can rotate and flip the shielding plate 18 through the cover shaft 17. When the shielding plate 18 is turned outwards, the left and right sides of the lower cover 16 can be opened. At this time, the shielding plate 18 can be flatly supported at the end of the grinding part of the main body for shielding, protecting its end and making the shielding area larger and the adaptability better. At the same time, the elastic movement of the connecting spring 20 can link the shielding buckle 21 for elastic movement. When the shielding buckle 21 and the end of the hanging plate 19 elastically move to form a clamping area, the water pipe can be clamped for use, allowing the end to convey the cooling water pipe during grinding, facilitating better assembly and use. When not in use, it can be adjusted and separated from the grinding disc for storage, with stronger flexibility. Through the engagement between the docking seat 24 and the central handle 25, they can be assembled. At this time, the internal hollow cavity of the docking seat 24 can be connected to the hollow cavity of the central handle 25. When lime is added to the docking seat 24, it can flow into the central handle 25 and leak out through the filter screen at the end of the central handle 25 for utilization. At this time, when holding the central handle 25, simple drying and sweat absorption treatment can be carried out, effectively preventing slipping and maintaining a safe controllability during use. At the same time, the lower shaft 28 can be rotated,Rotate the lower base 26 so that the lower buckle hole 27 faces the locking screw 30, and then perform rotational locking and positioning for firm use. The fixed base 29 can rotate with the main body to adjust the direction. At this time, the movable buckle 22 can be inserted and engaged with the side end wall of the fixed base 29 to lock its orientation, making it firm and stable during use, achieving a two-way adjustment effect, providing better flexibility and controllability when held, and better adaptability. When in use, hold the main body to polish the finished end of the heat exchanger.

[0037] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A handheld grinding device with a separating grinding disc for fine finishing of finished heat exchangers, comprising a machine body (1) and a connecting seat (11), characterized in that: An electric telescopic rod (2) is installed at the upper left end of the machine body (1), and a connecting rod (3) is arranged at the end of the electric telescopic rod (2). An upper shielding mechanism (4) is installed at the top end of the connecting rod (3). A grip (14) is fixed in the middle of the left end of the machine body (1), and a connecting ruler (10) passes through the end of the grip (14). A connecting seat (11) is arranged on the outer end of the connecting ruler (10), and a side buckle (12) is installed on the side end of the connecting seat (11). A spring (13) is arranged at the bottom end of the connecting seat (11). A lower protection mechanism (15) is installed at the lower left end of the machine body (1). A pair of buckles (22) and a pair of holding mechanisms (23) are arranged on the front wall of the right end of the machine body (1). The upper shielding mechanism (4) includes a shielding cover (5), an inner cover groove (6), a cover opening (7), a side box (8) and a box hole (9). An inner cover groove (6) is opened at the inner end of the shielding cover (5). A cover opening (7) passes through the middle of the shielding cover (5). A side box (8) is arranged at the side end of the inner cover groove (6), and a box hole (9) is opened at the end of the side box (8). The lower protection mechanism (15) includes a lower cover (16), a cover shaft (17), a shielding plate (18), a hanging plate (19), a connecting spring (20) and a shielding buckle (21). A cover shaft (17) and a shielding plate (18) are arranged at the end of the lower cover (16). A hanging plate (19) is arranged at the end of the shielding plate (18), and a connecting spring (20) is arranged inside the bottom end of the hanging plate (19). The shielding buckle (21) is fixedly connected to the end of the connecting spring (20) by welding.

2. A hand-held grinding device with a separating grinding disc for fine finishing of a finished heat exchanger, characterized in that: The shielding cover (5) is rectangular, and the vertical central axis of the shielding cover (5) coincides with the vertical central axis of the cover opening (7). Moreover, the shielding cover (5) and the machine body (1) are mutually cooperated and clamped.

3. The hand-held grinding device with a separating grinding disc for fine finishing of a finished heat exchanger according to claim 1, characterized in that: The side boxes (8) are symmetrically distributed about the center of the shielding cover (5), and the box holes (9) are equidistantly distributed about the end of the side box (8). At the same time, the connecting ruler (10) and the connecting seat (11) are mutually cooperated and movable.

4. A hand-held grinding device with a separating grinding disc for fine finishing of a finished heat exchanger, characterized in that: The lower cover (16) is fixedly connected to the connecting ruler (10), and the connecting ruler (10) is cylindrical. At the same time, the connecting seat (11) and the side buckle (12) are mutually cooperated and clamped.

5. The hand-held grinding device with a separating grinding disc for fine finishing of a finished heat exchanger according to claim 1, characterized in that: The shielding plates (18) are symmetrically distributed about the center of the lower cover (16), and the shielding plates (18) are mutually cooperated and rotated with the lower cover (16) through the cover shaft (17). At the same time, the hanging plate (1) is in the shape of "mountain", and the hanging plate (19) and the shielding buckle (21) are mutually cooperated to form an elastic structure through the connecting spring (20).

6. The hand-held grinding device with a separating grinding disc for fine repair of a finished heat exchanger according to claim 1, wherein: The holding mechanism (23) includes a docking base (24), a central handle (25), a lower base (26), a lower buckle hole (27), a lower shaft (28), a base fixing seat (29) and a locking screw (30). The bottom end of the docking base (24) is provided with a central handle (25). The bottom end wall of the central handle (25) is fixed with a lower base (26), and a lower buckle hole (27) is opened at the end of the lower base (26). The bottom end of the lower base (26) is provided with a lower shaft (28), and the bottom end of the lower shaft (28) is provided with a base fixing seat (29). A locking screw (30) is inserted into the end wall of the base fixing seat (29).

7. A handheld grinding device with a separating grinding disc for fine finishing of a finished heat exchanger, according to claim 6, characterized in that: The docking base (24) and the central handle (25) are engaged with each other. At the same time, the lower base (26) and the locking screw (30) are cooperatively formed into a threaded connection through the lower buckle hole (27), and the lower base (26) and the base fixing seat (29) are cooperatively rotated through the lower shaft (28).

Images