Derusting device for deep hole of crankcase of diesel engine

Abstract

The utility model discloses a diesel engine crankcase deep hole derusting device which is used for derusting a diesel engine crankcase deep hole 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 polishing head, and metal bristles are evenly distributed on the outer wall of the polishing 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 utility model 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 the deep holes of a diesel engine crankcase. Background Art

[0002] The diesel engine crankcase is the fundamental mounting and support platform for all diesel engine components, making it extremely important. The crankcase is designed with multiple oil passages that supply oil to the engine's systems. To reduce the risk of oil leakage within these passages, these passages are typically machined and drilled into the crankcase casting.

[0003] Before diesel engines are assembled, parts production workshops must complete the processing of various parts in advance and store them in warehouses. However, considering practical issues such as product demand and market fluctuations, various parts such as crankcases are often stored for long periods of time after being stored. With the change of seasons, the temperature and humidity in the warehouse change. Although the crankcases are surface-sealed to prevent rust before storage, the various built-in deep-hole oil passages cannot be guaranteed to be completely oil-sealed. Therefore, the cast iron crankcases 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 seal. 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 the various branch oil channels to achieve lubrication and heat dissipation. If rust is carried along with the clean oil to the main bearings and other locations 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 failure of the diesel engine.

[0006] There are two existing methods for cleaning rust from deep-hole oil passages: one is chemical corrosion 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 passage, scrape it back and forth, and then use compressed air to blow it clean to achieve the rust removal effect. However, after chemical corrosion removal, the remaining chemicals in the deep-hole oil passage need to be cleaned, 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 operation of the engine in the later stage. After the wire mesh friction removal is completed, when the compressed air is used for cleaning, the rust droplets are likely to enter the crankcase or accumulate in the dead corners, making it impossible to completely clean it. Utility Model Content

[0007] In order to solve the above technical problems, the utility model 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. The rust is scraped and polished while the fallen rust is sucked into the interior 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 being connected to the other end of the hollow tube, and the outer wall of the grinding head being evenly covered with metal bristles, and a circumferential air vent being provided 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 inward from the end opening, the curved branch tube being a C-shaped curved structure and the bending direction being such that the compressed air flows 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 utility model 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 utility model 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 utility model is that the hollow tube has no less than 5 ventilation holes around it, and the number of ventilation holes on each circle is no less than 6.

[0013] A further improvement of the technical solution of the present utility model is that the hollow tube is connected to the grinding head and the handheld body tube via 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 removal 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 utility model provides a grinding head at one end of a hollow tube, and the outer wall of the grinding head is evenly covered with metal bristles, and a circumferential air vent is provided 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, and will not enter the crankcase or accumulate in the corner. The utility model does not need to be cleaned after the rust removal is completed, 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 utility model gradually decreases from the open end to the connection end with the handheld main body pipe, so that the compressed air flowing into the device is faster, and a greater pressure difference is generated between the inside of the device and the outside atmosphere, which can better absorb and discharge the fallen rust.

[0018] The angle between the curved branch pipe and the handheld main body pipe of the utility model and the side close to the hollow pipe 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 utility model has ventilation holes on at least 5 circles, and the number of ventilation holes on each circle is at least 6. This arrangement further enhances the dust collection effect of the device.

[0020] The hollow tube of the utility model is connected to the grinding head and the handheld main body tube by threads. When rust is removed from deep holes of different diameters, only the hollow tube and the grinding head need to be replaced. The utility model has a wider range of applications and is also convenient to replace when the grinding head is greatly worn.

[0021] The end opening of the curved branch pipe of the utility model is connected with a rust removal air filter or a dust-proof cloth bag, which can more easily collect the rust that is polished off. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model when in use;

[0024] Figure 3 It is a cross-sectional view of the utility model when in use;

[0025] Figure 4 It is a structural diagram of the negative pressure joint of the utility model;

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

[0027] Among them, 1. Hollow tube; 2. Negative pressure joint; 3. Vent; 4. Grinding head; 5. Handheld main tube; 6. Bent branch tube. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the embodiments:

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

[0030] The utility model has 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 a thread. The other end of the hollow tube 1 is connected to a detachable grinding head 4 by a thread. The outer wall of the grinding head 4 is evenly covered with metal bristles. There are no less than 5 and no less than 6 air outlet holes 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: the handheld main body tube 5 and the curved branch tube 6. The other end of the handheld main body tube 5 is connected to the hollow tube 1. The surface of the mouth is provided with a thread, which can be connected to a rust removal air filter or a dust bag, etc., so that the rust that is polished off can be collected more easily; the curved branch pipe 6 is bent toward the polishing head 4 of the hollow tube 1, and the angle with the handheld main body tube 5 close to the side of the hollow tube 1 is less than 60 degrees. The inner diameter of the curved 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 rate entering the device faster, 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 this utility model is as follows:

[0032] The utility model uses the grinding head 4 to scrape and grind away 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 without entering the crankcase or accumulating in the corner. The utility model does not need to be cleaned after rust removal is completed, has low working cost, and can achieve complete cleaning of the deep holes of the diesel engine crankcase. When rusting deep holes with different apertures, it is only necessary to replace the hollow tube 1 and the grinding head 4. The scope of application is wider, and it is also convenient to replace the grinding head 4 when the degree of wear is large.

Claims

1. A deep hole rust removal device for a diesel engine crankcase, characterized by: 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 uniformly covered with metal bristles; a circumferential vent hole (3) is provided 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 curved direction causes the compressed air to 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. The deep hole rust removal device for a diesel engine crankcase 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. The deep hole rust removal device for a diesel engine crankcase 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) around each circle is no less than 6.

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

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

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