Derusting device for deep hole of crankcase of diesel engine

Abstract

The invention discloses a diesel engine crankcase deep hole rust removal device which is used for diesel engine crankcase deep hole rust removal and comprises a hollow pipe and a negative pressure connector detachably connected with one end of the hollow pipe, the other end of the hollow pipe is connected with a detachable grinding head, and metal bristles are evenly distributed on the outer wall of the grinding head. A circumferential vent hole is formed in the position, close to the polishing head, of the pipe wall of the hollow pipe, and the negative pressure connector is of a hollow structure and comprises a handheld body pipe communicating with the hollow pipe and a bent branch pipe communicating with the handheld body pipe and used for introducing compressed air inwards from an end opening. The bent branch pipe is of a C-shaped bent structure, and the bent direction enables compressed air to flow from an end opening of the bent branch pipe to an end opening far away from the hollow pipe. Compressed air is introduced into the negative pressure connector to generate negative pressure in the device, the fallen rust is sucked into the device while the rust is scraped and polished, cleaning is not needed after rust removal is completed, and complete cleaning of the deep hole of the crankcase of the diesel engine can be achieved.

Description

Technical Field

[0001] The invention relates to a rust removal device, in particular to a deep hole rust removal device for a diesel engine crankcase, which is used for rust removal of deep holes in a diesel engine crankcase. Background Art

[0002] The importance of the diesel engine crankcase as the basic installation support platform for all diesel engine components is self-evident. The crankcase is designed with multiple oil channels to provide oil to the diesel engine system. In order to reduce the risk of oil leakage in the oil channels, the oil channels are usually built in by machining and drilling the crankcase casting blank.

[0003] Before assembling the diesel engine, the parts production workshop must complete the processing of various parts in advance and store them in the warehouse. However, considering practical issues such as product demand and market fluctuations, various parts such as crankcases are often stored for a long time after being stored. With the change of seasons, the temperature and humidity in the warehouse are changing. Although the crankcase has been treated with surface oil seals to prevent rust before storage, the various built-in deep-hole oil passages cannot be guaranteed to be completely oil sealed. The cast iron crankcase will inevitably rust during storage.

[0004] In addition, the crankcase will be cleaned twice before installation to remove the oil seal medium before storage and dust and impurities generated during various storage and transportation processes. However, due to factors such as the scheduling of the assembly workshop, the cast iron crankcase after cleaning is often exposed to the air for a long time without any oil seals. Especially in the hot and humid summer, the machined surface of the cast iron crankcase will rust in about a day.

[0005] When the diesel engine is running, the filtered clean oil enters the main oil channel and is then supplied to each branch oil channel to achieve lubrication and heat dissipation. If rust is carried along with the clean oil to the main bearings that bear heavy loads and establish a pressure oil film, it is very likely to cause serious accidents such as crankcase seizure and burning of the crankshaft, resulting in the premature scrapping of the diesel engine.

[0006] There are two existing methods for cleaning rust in deep hole oil channels. One is chemical corrosion and rust removal, and the other is to tie a wire mesh to a metal rod, manually insert the wire mesh into the deep hole main oil channel and scrape it back and forth, and then use compressed air to blow and clean it to achieve the effect of rust removal. However, after chemical corrosion and rust removal, it is also necessary to clean the remaining chemicals in the deep hole oil channel, which increases the cost of rust removal and cannot ensure that the built-in deep holes can be completely cleaned for the complex structure and large size of the diesel engine crankcase, which has a certain impact on the actual work of the engine in the later stage; after the wire mesh friction rust removal is completed, when compressed air is used for blowing and cleaning, the rust droplets are likely to enter the crankcase or accumulate in the dead corners, and cannot be completely cleaned. Summary of the invention

[0007] In order to solve the above-mentioned technical problems, the present invention provides a deep hole rust removal device for a diesel engine crankcase. Compressed air is introduced into the negative pressure joint to generate negative pressure in the device. While scraping and polishing the rust, the fallen rust is sucked into the inside of the device. After the rust removal is completed, no cleaning is required, and the deep holes of the diesel engine crankcase can be completely cleaned.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A deep hole rust removal device for a diesel engine crankcase comprises a hollow tube and a negative pressure joint detachably connected to one end of the hollow tube, a detachable grinding head is connected to the other end of the hollow tube, and the outer wall of the grinding head is evenly distributed with metal bristles, and a circumferential air vent is arranged on the tube wall of the hollow tube near the grinding head; the negative pressure joint is a hollow structure, comprising a handheld main body tube connected to the hollow tube and a curved branch tube connected to the handheld main body tube for introducing compressed air inwardly from an end opening, the curved branch tube presents a C-shaped curved structure and the bending direction makes the compressed air flow from the end opening of the curved branch tube to the end opening away from the hollow tube.

[0010] A further improvement of the technical solution of the present invention is that the inner diameter of the curved branch tube gradually decreases from the open end to the end connected to the handheld main body tube.

[0011] A further improvement of the technical solution of the present invention is that the angle between the curved branch tube and the handheld main body tube close to the hollow tube is less than 60 degrees.

[0012] A further improvement of the technical solution of the present invention is that the hollow tube has no less than 5 circles of ventilation holes, and the number of ventilation holes per circle is no less than 6.

[0013] A further improvement of the technical solution of the present invention is that the hollow tube is connected to the grinding head and the handheld body tube through threads.

[0014] A further improvement of the technical solution of the present invention is that the end opening of the curved branch pipe is connected to a rust-removing air filter or a dust-proof bag.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0016] The present invention arranges a grinding head at one end of the hollow tube, and the outer wall of the grinding head is evenly distributed with metal bristles, and a circumferential vent hole is arranged near the grinding head. When the grinding head is used to scrape and grind the rust, compressed air is introduced into the curved branch pipe. Due to the surge in air flow rate in the device, the pressure in the device drops sharply and a negative pressure is generated. The scattered rust is sucked into the device and discharged from one end of the handheld main body tube. It will not enter the crankcase or accumulate in the corner. After the rust removal is completed, the present invention does not need to be cleaned, the working cost is low, and the deep holes of the diesel engine crankcase can be completely cleaned.

[0017] The inner diameter of the curved branch pipe of the present invention gradually decreases from the open end to the end connected to the handheld main body pipe, so that the compressed air flow rate entering the device is faster, and a greater pressure difference is generated between the inside of the device and the external atmosphere, so that the fallen rust can be better sucked in and discharged.

[0018] The angle between the curved branch tube and the handheld main body tube close to the hollow tube is less than 60 degrees. This angle setting can make the compressed air flow faster into the device, thereby creating a greater pressure difference between the inside of the device and the outside atmosphere, and better sucking in and discharging the fallen rust.

[0019] The hollow tube of the present invention has ventilation holes at least 5 times, and the number of ventilation holes at each time is not less than 6. This arrangement further enhances the dust collection effect of the device.

[0020] The hollow tube of the present invention is connected to the grinding head and the handheld body tube by threads. When rust is removed from deep holes with different apertures, only the hollow tube and the grinding head need to be replaced. The application range is wider and the grinding head is also convenient to replace when the wear degree of the grinding head is large.

[0021] The end opening of the curved branch pipe of the present invention is connected with a rust-removing air filter or a dust-proof cloth bag, so that the rust polished off can be collected more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the use of the present invention;

[0024] Figure 3 It is a cross-sectional view used in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the negative pressure joint of the present invention;

[0026] Figure 5 It is a cross-sectional view of the present invention.

[0027] Among them, 1. hollow tube; 2. negative pressure joint; 3. vent hole; 4. grinding head; 5. handheld main tube; 6. bent branch tube. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with embodiments:

[0029] like Figure 1 As shown, a deep hole rust removal device for a diesel engine crankcase comprises a hollow tube 1, a negative pressure joint 2, a vent hole 3, a grinding head 4, a handheld main body tube 5 and a curved branch tube 6.

[0030] The present invention is a hollow structure as a whole. One end of the hollow tube 1 and one end of the handheld main body tube 5 are detachably connected by threads. The other end of the hollow tube 1 is connected to a detachable grinding head 4 by threads. The outer wall of the grinding head 4 is evenly distributed with metal bristles. There are no less than 5 circles and no less than 6 air outlet holes per circle on the wall of the hollow tube 1 near the grinding head 4. This arrangement further enhances the dust collection effect of the device. The negative pressure joint 2 includes two integrally formed parts: a handheld main body tube 5 and a curved branch tube 6. The other end port of the handheld main body tube 5 connected to the hollow tube 1 The surface is provided with threads, which can be connected to a rust-removing air filter or a dust bag, etc., so that the rust polished off can be collected more easily; the bent branch pipe 6 is bent toward the grinding head 4 of the hollow tube 1, and the angle with the handheld main body tube 5 close to the hollow tube 1 is less than 60 degrees, and the inner diameter of the bent branch pipe 6 gradually decreases from the open end to the connection end with the handheld main body tube 5. This angle and shape design makes the compressed air flow faster into the device, and a greater pressure difference is generated between the inside of the device and the outside atmosphere, so that the fallen rust can be better sucked in and discharged.

[0031] The working principle of the present invention is as follows:

[0032] The present invention uses the grinding head 4 to scrape and grind the rust while introducing compressed air into the curved branch pipe 6. Due to the surge in flow rate in the device, the pressure in the device drops sharply and generates negative pressure. The scattered rust is sucked into the device and discharged from the device from one end of the handheld main body tube 5. It will not enter the crankcase or accumulate in the corner. After the rust removal is completed, the present invention does not need to be cleaned, the working cost is low, and the deep holes of the diesel engine crankcase can be completely cleaned. When rust removal is performed on deep holes of different apertures, only the hollow tube 1 and the grinding head 4 need to be replaced. The scope of application is wider, and it is also convenient to replace when the grinding head 4 is highly worn.

Claims

1. A deep hole rust removal device for a diesel engine crankcase, characterized in that: The invention comprises a hollow tube (1) and a negative pressure joint (2) detachably connected to one end of the hollow tube (1); the other end of the hollow tube (1) is connected to a detachable grinding head (4), and the outer wall of the grinding head (4) is evenly distributed with metal bristles; a circumferential vent hole (3) is arranged on the tube wall of the hollow tube (1) near the grinding head (4); the negative pressure joint (2) is a hollow structure, comprising a handheld main body tube (5) connected to the hollow tube (1) and a curved branch tube (6) connected to the handheld main body tube (5) for introducing compressed air inwardly from an end opening; the curved branch tube (6) is a C-shaped curved structure and the bending direction makes the compressed air flow from the end opening of the curved branch tube (6) to the end opening away from the hollow tube (1).

2. A diesel engine crankcase deep hole rust removal device according to claim 1, characterized in that: The inner diameter of the curved branch tube (6) gradually decreases from the open end to the end connected to the handheld main body tube (5).

3. A diesel engine crankcase deep hole rust removal device according to claim 1, characterized in that: The angle between the curved branch tube (6) and the handheld main body tube (5) close to the hollow tube (1) is less than 60 degrees.

4. A diesel engine crankcase deep hole rust removal device according to claim 1, characterized in that: The hollow tube (1) has ventilation holes (3) arranged around no less than 5 circles, and the number of ventilation holes (3) arranged around no less than 6 circles.

5. A diesel engine crankcase deep hole rust removal device according to claim 1, characterized in that: The hollow tube (1) is connected to the grinding head (4) and the handheld body tube (5) via threads.

6. A diesel engine crankcase deep hole rust removal device according to claim 1, characterized in that: The end opening of the curved branch pipe (6) is connected to a rust-removing air filter or a dust-proof cloth bag.

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