Portable dismounting tool for valve seat ring of cylinder cover of large diesel engine

Abstract

The utility model discloses a portable large diesel engine cylinder cover valve seat ring dismantling tool which comprises a supporting base, a supporting cross beam and a center screw rod, the center screw rod is connected to the center position of the supporting cross beam in a threaded mode, the supporting cross beam is of a U-shaped structure, the two ends of the supporting cross beam are detachably installed on the upper surface of a cylinder cover, and the supporting cross beam is of a U-shaped structure. According to the portable large diesel engine cylinder cover valve seat ring dismounting tool, dismounting of a diesel engine body cylinder seat ring can be completed under the condition that a machine tool cannot be used, and meanwhile a valve seat and the cylinder cover cylinder seat ring are protected against damage. The dismounting efficiency of the cylinder seat ring is improved, and the cutter loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine repair technology, specifically a portable large diesel engine cylinder head valve seat removal tool. Background Technology

[0002] The cylinder head is one of the main components of a diesel engine. It operates under harsh conditions and has high requirements, which greatly affects the performance and reliability of the diesel engine. When repairing a cylinder head, all valve seats need to be removed and replaced.

[0003] Existing methods for removing valve seats mainly include milling and induction heating. Milling involves milling the old valve seat off on a milling or drilling machine, but this is time-consuming and labor-intensive, and carries the risk of damaging the valve seat bearing bore, rendering the cylinder head unusable. Induction heating uses the principle of electromagnetic induction to convert industrial frequency power into a specific frequency band, thereby heating the metal material. After induction heating for 3-6 seconds, the valve seat can be easily removed once it returns to room temperature. However, the required equipment is expensive, it must be used in a space with electricity, and it carries a high risk, as improper heating time can damage the valve seat bearing bore. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a portable tool for removing the valve seat rings of a large diesel engine cylinder head. It does not require machining on a machine tool, saves time and effort, and does not damage the valve seat ring bearing holes. It is safe to operate and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable large diesel engine cylinder head valve seat removal tool, including a support base, a support beam and a central screw;

[0006] The central screw is threaded to the center of the support beam, which has a U-shaped structure and its two ends are detachably mounted on the upper surface of the cylinder head.

[0007] The upper end of the support base is movably connected to the lower end of the central screw.

[0008] As a preferred technical solution of this utility model, the support base includes a base plate, a mounting plate and a connecting block;

[0009] The mounting plate is rotatably connected to the middle position of the base plate via a bearing ring. The connecting blocks are symmetrically fixed to the upper surface of the mounting plate. The connecting blocks are machined with pin holes. The two connecting blocks are rotatably connected to the lower end of the central screw via pins passing through the pin holes.

[0010] As a preferred embodiment of this utility model, the rotation angle of the base plate is not less than 60°.

[0011] As a preferred technical solution of this utility model, the base plate is formed by cutting off the corresponding two sides of a round metal block, and the length of the base plate is greater than the inner hole size of the valve seat ring.

[0012] As a preferred embodiment of this utility model, the outer surface of the connecting block is an arc-shaped surface, and a positioning sleeve is fitted onto the outer surface of the two connecting blocks. The inner surface of the positioning sleeve is in contact with the outer surface of the connecting block, and the outer surface of the positioning sleeve is in contact with the inner hole of the valve seat ring.

[0013] As a preferred embodiment of this utility model, a hexagonal nut is welded to the outer surface of the upper end of the central screw.

[0014] Compared with the prior art, the beneficial effects of this utility model are: this portable large diesel engine cylinder head valve seat removal tool can realize convenient and efficient removal of valve seats without damaging the original mechanical properties and dimensional structure of the valve seats, thereby improving the disassembly efficiency of valve gaskets, avoiding the risk of bore damage, and saving tool wear. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention in use;

[0016] Figure 2 This is a schematic diagram of the structure supporting the base;

[0017] Figure 3 for Figure 2 The left view;

[0018] Figure 4 for Figure 2 Top view.

[0019] In the diagram: 1 Cylinder head, 2 Support base, 21 Base plate, 22 Mounting plate, 23 Connecting block, 24 Pin hole, 3 Positioning sleeve, 4 Valve seat ring, 5 Support beam, 6 Hex nut, 7 Center screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments (for ease of description and understanding, hereinafter referred to as...). Figure 1 (The above is described above). Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] like Figure 1This utility model provides a technical solution: a portable large diesel engine cylinder head valve seat removal tool, including a support base 2, a support beam 5 and a central screw 7. The central screw 7 is threaded to the center of the support beam 5. The support beam 5 has a U-shaped structure. The two ends of the support beam 5 are bolted to the upper surface of the cylinder head 1.

[0022] like Figure 2-4 The support base 2 includes a base plate 21, a mounting plate 22, and a connecting block 23. The mounting plate 22 is rotatably connected to the middle position of the base plate 21 via a bearing ring. The connecting blocks 23 are symmetrically fixed on the upper surface of the mounting plate 22. The connecting blocks 23 are machined with pin holes 24. The two connecting blocks 23 are rotatably connected to the lower end of the central screw 7 via pins passing through the pin holes 24. By movably connecting the support base 2 and the central screw 7, it is convenient to tilt the base plate 21 at a certain angle and enter the bottom hole of the valve seat 4. Then, by rotating the central screw 7, an axial pulling force is generated to quickly remove the valve seat 4.

[0023] To facilitate the passage of the base plate 21 through the inner hole of the valve seat ring 4, the rotation angle of the base plate 21 shall not be less than 60°.

[0024] In order to increase the contact area between the base plate 21 and the lower part of the valve seat ring 4, the base plate 21 is formed by cutting off the corresponding two sides of a round metal block, and the length of the base plate 21 is greater than the inner hole size of the valve seat ring 4.

[0025] To ensure that the support base 2 is located in the middle of the inner hole of the valve seat ring 4, and to ensure that the pulling force applied to the valve seat ring 4 is uniform when the support base 2 is pulled, so as to avoid damage to the valve seat ring 4 or the inner hole of the valve seat ring 4, the outer side of the connecting block 23 is arc-shaped. The outer side of the two connecting blocks 23 is fitted with the positioning sleeve 3. The inner side of the positioning sleeve 3 is in contact with the outer side of the connecting block 23, and the outer side of the positioning sleeve 3 is in contact with the inner hole of the valve seat ring 4. The positioning sleeve 3 ensures that the central screw 7 is coaxial with the inner hole of the valve seat ring 4, thus ensuring positioning accuracy.

[0026] To facilitate the rotation of the central screw 7, a hexagonal nut 6 is welded to the outer side of the upper end of the central screw 7.

[0027] In use: First, place the cylinder head 1 on the workbench and fix it with strong bolts. Then, put the positioning sleeve 3 on the center screw 7. Rotate the base plate 21 to tilt it and let it enter the bottom hole of the valve seat 4. The positioning sleeve 3 ensures that the center screw 7 and the inner hole of the valve seat 4 are coaxial. After positioning, install the support beam 5 on the cylinder surface of the cylinder head 1. Use a wrench to hold the hexagonal nut 6 and rotate it, thereby driving the center screw 7 and the support base 2 to move upward and remove the valve seat 4.

[0028] This invention can quickly remove the valve seat ring 4, which is much faster than removing the valve seat ring 4 by machine tool processing. It saves tool wear, improves the disassembly efficiency of the valve seat ring 4, and avoids damage to the bore diameter of the valve seat ring 4. The operation method is simple and efficient, requires less personal ability from the operator, has low disassembly time cost, and is highly practical.

[0029] The parts of the utility model not described in detail are prior art. Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A portable tool for removing valve seats from the cylinder head of a large diesel engine, characterized in that: It includes a support base (2), a support beam (5), and a central screw (7); The central screw (7) is threaded to the center of the support beam (5). The support beam (5) has a U-shaped structure, and both ends of the support beam (5) are detachably mounted on the upper surface of the cylinder head (1). The upper end of the support base (2) is movably connected to the lower end of the central screw (7).

2. The portable large diesel engine cylinder head valve seat removal tool according to claim 1, characterized in that: The support base (2) includes a base plate (21), a mounting plate (22), and a connecting block (23); The mounting plate (22) is rotatably connected to the middle position of the base plate (21) via a bearing ring. The connecting block (23) is symmetrically fixed to the upper surface of the mounting plate (22). The connecting block (23) is machined with a pin hole (24). The two connecting blocks (23) are rotatably connected to the lower end of the central screw (7) via a pin shaft passing through the pin hole (24).

3. The portable large diesel engine cylinder head valve seat removal tool according to claim 2, characterized in that: The rotation angle of the base plate (21) is not less than 60°.

4. The portable large diesel engine cylinder head valve seat removal tool according to claim 2, characterized in that: The base plate (21) is formed by cutting off the corresponding two sides of a round metal block, and the length of the base plate (21) is greater than the inner hole size of the valve seat ring (4).

5. A portable large diesel engine cylinder head valve seat removal tool according to claim 2, characterized in that: The outer side of the connecting block (23) is an arc-shaped surface. The outer sides of the two connecting blocks (23) are fitted with positioning sleeves (3). The inner side of the positioning sleeve (3) is in contact with the outer side of the connecting block (23), and the outer side of the positioning sleeve (3) is in contact with the inner hole of the valve seat ring (4).

6. The portable large diesel engine cylinder head valve seat removal tool according to claim 1, characterized in that: A hexagonal nut (6) is welded to the outer side of the upper end of the central screw (7).

Images