High-speed diesel engine cylinder cover pumping tool

Abstract

The invention relates to the field of diesel engine production and manufacturing, and discloses a high-speed diesel engine cylinder cover pumping tool which comprises a bottom plate, a rubber gasket is connected to the top of the bottom plate, a cylindrical pin is connected to the top of the rubber gasket, specially-made screws are connected to the top of the cylindrical pin at equal intervals, and 1-shaped nuts are connected to the tops of the specially-made screws through gaskets. The top of the rubber gasket is connected with a pressing plate gasket through a pressing plate. The high-speed diesel engine cylinder cover pumping tool can pump air, switching of the two modes is simple and convenient, the tool does not need to be disassembled many times, detection work of related cavities can be completed, quality accidents caused by leakage in a cylinder cover are reduced, safety in the construction process is improved, faults are rapidly removed, support is provided for subsequent improvement, and the working efficiency is improved. And foreign expensive and complex tools do not need to be purchased, the economic cost is reduced, and the tool is light in design, convenient to transport, capable of effectively improving the manufacturing efficiency, high in practicability and beneficial to wide popularization.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine production and manufacturing, in particular to a high-speed diesel engine cylinder head pumping tool. Background Art

[0002] The cylinder head is a key component of a diesel engine. Its complex and compact structure houses multiple chambers for lubricating oil, fresh water, fuel, and high-pressure air. Casting is challenging and prone to defects, which are difficult to detect. Leaks in the cylinder head can easily lead to rust on the cylinder liner, water ingress into the lubricating oil, and even more serious quality issues. Furthermore, the cylinder head operates in harsh conditions. Under rated operating conditions, the combustion surface must withstand temperatures of approximately 600°C and pulse pressures of 150 bar, approximately 700 times per minute, further increasing the frequency of failures.

[0003] Diesel engine cylinder head (see Figure 1 ) has a complex and compact structure. The main chambers of the cylinder head include the cooling water chamber W area, the starting valve hole L area, the pressure reducing screw hole L area, the intake chamber L area, the drawing O (oil chamber) area, the K (fuel channel) area and the combustion surface. It is difficult to cast and is prone to casting defects. If there are casting defects inside the cylinder head, it is not easy to find them. Cylinder head leakage can easily lead to rust of the cylinder liner, water ingress of lubricating oil, and even more serious quality problems.

[0004] The existing tooling can only perform pump pressure tests on the W area of ​​the cooling water chamber. If there is looseness or leakage in other areas, it is difficult to detect, and quality problems may occur during use, resulting in increased quality losses and increased repetitive work. At the same time, the existing tooling is expensive, has poor interchangeability, and is inconvenient to operate in practice. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a high-speed diesel engine cylinder head pumping tool to solve the above-mentioned technical problems.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-speed diesel engine cylinder head pumping tool, comprising a base plate, the top of the base plate is connected to a rubber gasket, the top of the rubber gasket is connected to a cylindrical pin, the top of the cylindrical pin is evenly spaced with a special screw, the top of the special screw is connected to a Type 1 nut through a washer, the top of the rubber gasket is connected to a pressure plate gasket through a pressure plate, and the top of the pressure plate gasket is connected to a full-thread screw.

[0009] Preferably, the base plate is made of Q235A material.

[0010] Preferably, the special screw is made of 20 steel.

[0011] Preferably, the pressing plate is made of Q235A material.

[0012] Preferably, a sealing gasket is connected between the washer and the special screw.

[0013] Preferably, the type 1 nut and the special screw are connected via a transfer tube.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the present invention provides a high-speed diesel engine cylinder head pumping tool with the following beneficial effects:

[0016] 1. Compared with traditional pumping tools, the high-speed diesel engine cylinder head pumping tool of the present invention can pump both water and air, and the switching between the two modes is simple and convenient;

[0017] 2. This high-speed diesel engine cylinder head pumping tool can pump multiple chambers after the tooling is installed. It does not need to disassemble the tooling multiple times to complete the inspection of the relevant chambers.

[0018] 3. This high-speed diesel engine cylinder head pumping tool has two pumping modes: water pumping and air pumping. First, hot water is used for pumping. According to the principle of thermal expansion and contraction, the cylinder head will expand to a certain extent. Then, air is pumped in hot water. The two pumping modes can effectively detect whether the cylinder head is leaking, ensure that the cylinder head meets the technical requirements, achieve quality pre-control, improve work efficiency, reduce quality loss rate, reduce quality accidents caused by internal leakage of the cylinder head, and increase safety during the construction process.

[0019] 4. This high-speed diesel engine cylinder head pump pressure tool can accurately locate the cylinder head leak if there is a leak, quickly troubleshoot the problem, and provide support for subsequent improvements and upgrades;

[0020] 5. The high-speed diesel engine cylinder head pumping tool is independently designed and manufactured, eliminating the need to purchase expensive and complex tools from abroad, thus reducing economic costs;

[0021] 6. The high-speed diesel engine cylinder head pumping tool and the sealing method are simple to operate, the tooling design is light and convenient to transport, which can effectively improve the manufacturing efficiency, has strong practicality, and is conducive to wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the cylinder head structure of the present invention;

[0023] Figure 2 This is a general schematic diagram of the pumping tool of the present invention;

[0024] Figure 3 This is a schematic diagram of the use of the pumping tool of the present invention;

[0025] Figure 4 This is a schematic diagram of the base plate of the present invention;

[0026] Figure 5 This is a schematic diagram of the special screw of the present invention;

[0027] Figure 6 This is a schematic diagram of the tooling seal of the present invention;

[0028] Figure 7 It is a schematic diagram of the pressing plate of the present invention.

[0029] In the figure: 1. Type 1 nut; 2. Washer; 3. Special screw; 4. Cylindrical pin; 5. Rubber gasket; 6. Base plate; 7. Pressure plate; 8. Pressure plate gasket; 9. Full-thread screw. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides a technical solution, a high-speed diesel engine cylinder head pumping tool, including a base plate 6, the base plate 6 is made of Q235A material, the top of the base plate 6 is connected to a rubber gasket 5, the top of the rubber gasket 5 is connected to a cylindrical pin 4, the top of the cylindrical pin 4 is evenly connected to a special screw 3, a sealing gasket is connected between the washer 2 and the special screw 3, the special screw 3 is made of 20 steel, the top of the special screw 3 is connected to a type 1 nut 1 through the washer 2, the type 1 nut 1 and the special screw 3 are connected through a transfer tube, the top of the rubber gasket 5 is connected to a pressure plate gasket 8 through a pressure plate 7, the pressure plate 7 is made of Q235A material, and the top of the pressure plate gasket 8 is connected to a full-thread screw 9.

[0032] The working principle of this device: This invention breaks the traditional pump pressure mode, through the two pump pressure tests of pumping water and pumping air (see Figure 2 ), the cooling water chamber W area, starting valve hole L area, pressure reducing screw hole L area, air intake chamber L area, drawing O (oil chamber) area, K (fuel channel) area and multiple chambers are tested simultaneously.

[0033] In order to achieve the above objectives, the technical solutions of the present invention are as follows:

[0034] Diesel engine cylinder head pump tool ( Figure 2) mainly includes: mainly includes: bottom plate 6 ( Figure 4 ) 1 piece, special screw 3 ( Figure 5 )8 pieces, tooling seals ( Figure 6 )1 piece, pressure plate 7( Figure 7 ) 1 piece, special interface parts and seals, conventional pipe thread interface, conventional water heater (must be able to heat to 90℃), conversion interface and hose, water tank, etc.

[0035] Here’s how it works:

[0036] After the above tooling is assembled, start pumping each chamber;

[0037] Perform strength tests on the cooling water chamber W area, the starting valve hole L area, the inspection screw hole L area, and the air intake chamber L area.

[0038] Install the sealing tool. With protective devices in place, inject water + 1% preservative solution into each chamber. Add 0.1% pigment to chamber W for strength testing. The test pressure is 1.5 times the working pressure of each chamber. Maintain a leak-proof seal for 15 minutes. Test each chamber individually without disassembling the tooling.

[0039] The test pressure of cooling water chamber W area is 7Bar.

[0040] The test pressure of oil chamber O area is 8Bar.

[0041] Perform a leak test according to MMN 370 and the drawing for the cooling water chamber (W), starting valve hole (L), pressure reducing screw hole (L), intake chamber (L), and areas O (oil chamber) and K (fuel channel). The workshop must heat the +1% preservative solution to above 80°C and prepare air at a bar above 1.0 bar.

[0042] Heat the cylinder head and water to 80°C. Inflate each chamber of the cylinder head to 1 bar. Observe whether bubbles emerge from the cylinder head in 80°C water at 1 bar. The test should be conducted 1 hour after the cylinder head is fully immersed in water.

[0043] The W chamber is required to be leak-free for 30 minutes, and the L, O, and K chambers are required to be leak-free for 5 minutes.

[0044] The present invention will be further described below with reference to the accompanying drawings:

[0045] 1.( Figure 1 ) is the cylinder head structure diagram, the red circle is the position that requires pump pressure;

[0046] 2.( Figure 2 ) General drawing of the pumping tool, used to connect the bottom seal of the cylinder head;

[0047] 3.( Figure 3) is the state where the pumping tool is connected and sealed to the cylinder cover and is ready for pumping. The pumping tool is at the bottom of the water tank, the pumping tool and the cylinder cover are connected and sealed, and the W, K, L, and O pumping areas above are connected to the corresponding pressure interfaces, ready for pumping.

[0048] 4. Make a base plate 6 ( Figure 4 ), used to seal the six water inlets, one oil inlet, and two air holes on the lower plane of the cylinder head (the cylinder head of row A only needs to seal one air hole, and the cylinder head of row B needs to seal two air holes);

[0049] 5. Make 8 special screws 3 ( Figure 5 ), used to tighten the bottom plate 6;

[0050] 6. Make a pressure plate 7 ( Figure 7 ) is used to seal the water cavity;

[0051] 7. Make a tool seal ( Figure 6 );

[0052] 8. Configuration: 9 3 full-thread screws (M10*30), 5 6 rubber gaskets, 4 6 cylindrical pins (10*30), 28 washers (GB / T96.1-02-16), 8 nuts (M16), (see Figure 2 );

[0053] 9. Other conversion interfaces, water tanks, and heaters can use the company's existing conventional equipment.

[0054] The present invention has been made and applied to production. The specific operation method is as follows:

[0055] 1.According to the matching table, get the relevant sealing cover and screw plug;

[0056] 2. Clean all parts and blow them clean with cold air, especially the inner cavity of the cylinder head. After completion, add 0.1% pigment to the W chamber;

[0057] 3. Seal each hole and process hole according to the drawing, such as Figure 3 As shown;

[0058] 4. Heat the +1% preservative solution to above 80°C and prepare air above 1 bar;

[0059] 5. Strength test the cooling water chamber (W), the starting valve hole (L), the screw hole (L), and the air intake chamber (L). Install a sealing tool and, with protective devices in place, inject water, 1% preservative solution, and 0.5% pigment into each chamber for strength testing. The test pressure is 1.5 times the operating pressure of each chamber and is maintained leak-proof for 15 minutes. Each chamber is tested separately.

[0060] The test pressure of cooling water chamber W area is 7Bar;

[0061] The test pressure of oil chamber O area is 8Bar.

[0062] 6. Perform sealing tests on the cooling water chamber W area, starting valve hole L area, pressure reducing screw hole L area, air intake chamber L area, drawing O (oil chamber) area, and K (fuel channel) area.

[0063] 7. Seal each chamber, heat the cylinder head and water to 80°C, and inflate each chamber to 1 bar. Observe whether bubbles emerge from the cylinder head in 80°C water at 1 bar. The test must be conducted 1 hour after the cylinder head is fully immersed in water.

[0064] The W chamber is required to be leak-free for 30 minutes, and the L, O, and K chambers are required to be leak-free for 5 minutes.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed diesel engine cylinder head pumping tool, characterized in that: The invention comprises a bottom plate (6), the top of the bottom plate (6) is connected to a rubber gasket (5), the top of the rubber gasket (5) is connected to a cylindrical pin (4), the top of the cylindrical pin (4) is evenly connected to a special screw (3), the top of the special screw (3) is connected to a type 1 nut (1) via a washer (2), the top of the rubber gasket (5) is connected to a pressure plate gasket (8) via a pressure plate (7), and the top of the pressure plate gasket (8) is connected to a full-thread screw (9).

2. A high-speed diesel engine cylinder head pumping tool according to claim 4, characterized in that: A sealing gasket is connected between the gasket (2) and the special screw rod (3).

3. A high-speed diesel engine cylinder head pumping tool according to claim 1, characterized in that: The type 1 nut (1) and the special screw rod (3) are connected via a transfer tube.

Images