Screw hole sealing surface scraping knife

Abstract

The utility model discloses a scraping knife for a sealing surface of a screw hole. The scraping knife comprises a knife shaft, the device is characterized in that the outer wall of the cutter shaft is sleeved with a bearing protection sleeve, bearings arranged on the outer wall of the cutter shaft in a sleeving mode are arranged at the positions, close to the left end and the right end, of the interior of the bearing protection sleeve, and a first gasket arranged on the outer wall of the cutter shaft in a sleeving mode is arranged on the left side of the bearing protection sleeve; the left side of the first gasket is provided with a first fastening nut connected with the cutter shaft through threads, the right side of the bearing protection sleeve is provided with a second gasket arranged on the outer wall of the cutter shaft in a sleeving mode, and the right side of the second gasket is provided with a cutter grinding disc arranged on the outer wall of the cutter shaft in a sleeving mode. The scraping knife for the sealing surface of the screw hole is reasonable in structural design, is different from other scraping knives for the sealing surface, mainly drives the knife shaft to rotate through power so as to enable the knife grinding disc to rotate, and then repairs the sealing surface of the screw hole through the grinding abrasive paper additionally arranged on the knife grinding disc, so that secondary damage to the sealing surface is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a scraping knife for a thread hole sealing surface. Background Art

[0002] At present, the most common problem found in the normal maintenance process of the thread plug type air cooler tube bundle is that the thread hole sealing surface is damaged after the thread plug is opened, which makes it difficult for the gasket to seal. However, the thread hole sealing surface is machined and formed in one step, and it is difficult to grasp its plane flatness during maintenance. If it is not repaired well, it will bring hidden dangers to the safe use of equipment and safe production. Therefore, a new thread hole sealing surface repair tool is urgently needed to solve the urgent need to repair the thread hole sealing surface of the air cooler tube bundle. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a special wire hole sealing surface scraping knife.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wire hole sealing surface scraper, comprising:

[0005] Knife shaft;

[0006] The invention is characterized in that: a bearing protection sleeve is sleeved on the outer wall of the cutter shaft, bearings sleeved on the outer wall of the cutter shaft are arranged inside the bearing protection sleeve near the left and right ends, a first gasket sleeved on the outer wall of the cutter shaft is arranged on the left side of the bearing protection sleeve, a first fastening nut connected to the cutter shaft through a thread is arranged on the left side of the first gasket, a second gasket sleeved on the outer wall of the cutter shaft is arranged on the right side of the bearing protection sleeve, a tool grinding disc sleeved on the outer wall of the cutter shaft is arranged on the right side of the second gasket, and a second fastening nut connected to the cutter shaft through a thread is arranged on the right side of the tool grinding disc.

[0007] In the above structure, a layer of grinding sandpaper is installed on the left side wall of the tool grinding disc.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the scraping knife for the thread hole sealing surface of the utility model has a reasonable structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a wire hole sealing surface scraper described in an embodiment of the utility model.

[0010] In the figure:

[0011] 1. Cutter shaft; 2. Bearing protection sleeve; 3. Bearing; 4. First gasket; 5. First fastening nut; 6. Second gasket; 7. Cutter grinding disc; 8. Second fastening nut; 9. Grinding sandpaper. DETAILED DESCRIPTION

[0012] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0013] like Figure 1 As shown, a thread hole sealing surface scraper comprises:

[0014] Knife axis 1;

[0015] The invention is characterized in that: a bearing protection sleeve 2 is sleeved on the outer wall of the cutter shaft 1, bearings 3 sleeved on the outer wall of the cutter shaft 1 are arranged near the left and right ends of the inner part of the bearing protection sleeve 2, a first gasket 4 sleeved on the outer wall of the cutter shaft 1 is arranged on the left side of the bearing protection sleeve 2, a first fastening nut 5 connected to the cutter shaft 1 through a thread is arranged on the left side of the first gasket 4, a second gasket 6 sleeved on the outer wall of the cutter shaft 1 is arranged on the right side of the bearing protection sleeve 2, a tool grinding disc 7 sleeved on the outer wall of the cutter shaft 1 is arranged on the right side of the second gasket 6, and a second fastening nut 8 connected to the cutter shaft 1 through a thread is arranged on the right side of the tool grinding disc 7.

[0016] In the above structure, a layer of grinding sandpaper 9 is installed on the left side wall of the tool grinding disc 7 .

[0017] The wire hole sealing surface scraping knife of the utility model has a reasonable structural design. The knife shaft is driven to rotate by power and then the tool grinding disc is driven to rotate. The bearing protection sleeve is inserted into the wire hole sealing surface port and the dimensional tolerance of the outer diameter of the bearing protection sleeve and the inner diameter of the wire hole is controlled within a reasonable range. The wire hole sealing surface is ground and repaired by the grinding sandpaper on the tool grinding disc. It is easy to form and has high efficiency. The key point is that the wire hole sealing surface will not be damaged for the second time. The maintenance efficiency of the tube bundle is improved, the maintenance time of the tube bundle is shortened, and the maintenance cost is reduced. The special tool is small in size and easy to carry.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A wire hole sealing surface scraper, comprising: Knife shaft (1); The invention is characterized in that: a bearing protection sleeve (2) is sleeved on the outer wall of the cutter shaft (1); bearings (3) sleeved on the outer wall of the cutter shaft (1) are provided inside the bearing protection sleeve (2) near the left and right ends; a first gasket (4) sleeved on the outer wall of the cutter shaft (1) is provided on the left side of the bearing protection sleeve (2); a first fastening nut (5) connected to the cutter shaft (1) through a thread is provided on the left side of the first gasket (4); a second gasket (6) sleeved on the outer wall of the cutter shaft (1) is provided on the right side of the bearing protection sleeve (2); a tool grinding disc (7) sleeved on the outer wall of the cutter shaft (1) is provided on the right side of the second gasket (6); and a second fastening nut (8) connected to the cutter shaft (1) through a thread is provided on the right side of the tool grinding disc (7).

2. The thread hole sealing surface scraper according to claim 1, characterized in that: A layer of grinding sandpaper (9) is additionally installed on the left side wall of the tool grinding disc (7).

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