Dismounting device for valve seat ring of diesel engine

Abstract

A dismounting device for a valve seat ring of a diesel engine comprises a workbench used for fixing an air cylinder cover and a fixed core push rod vertically stretching into an inner hole of a valve guide pipe of the air cylinder cover, a notch is machined in the head of the fixed core push rod in the axial direction, bolts are symmetrically arranged in the notch, a swing rod is rotatably arranged on the bolts, and the swing rod is movably connected with the fixed core push rod. The swing rod is composed of long edge sections and short edge sections, when the swing rod swings around the plug pin till the two long edge sections are attached, the swing rod is contained in the notch, and when the swing rod swings around the plug pin till the two short edge sections are attached, the swing rod has the maximum opening angle. The swing rod is contained in the notch of the fixed core push rod, the fixed core push rod can stretch into the inner hole of the valve guide pipe, then the swing rod swings to the maximum field angle due to the dead weight, the swing rod ejects the airtight seat ring out in the process of moving upwards along with the fixed core push rod, and the device is convenient to operate and high in working efficiency.

Description

Technical Field

[0001] The invention relates to a disassembly device for a valve seat ring of a diesel engine. Background Art

[0002] The valve seat ring is mainly used to seal the valve of the diesel engine. During use, it is a component that is always subjected to high-speed impact. Therefore, after a period of use, the valve seat ring of the diesel engine is prone to wear and failure to varying degrees and needs to be disassembled and replaced. The valve seat ring of the diesel engine is assembled to the cylinder head through an interference fit. It has the characteristics of high contact pressure with the cylinder head, small protruding edge, narrow internal operating space, and is not easy to disassemble with tools; the existing valve seat ring disassembly device basically forces the claw to expand and clamp the valve seat ring through the extrusion effect of the inclined surface. After that, the valve seat ring is taken out with the claw moving in a straight line. The device is not convenient during use and the work efficiency is not high. Summary of the invention

[0003] In view of the shortcomings existing in the above problems, the present invention provides a disassembly device for a valve seat ring of a diesel engine.

[0004] To achieve the above-mentioned purpose, the present invention provides a disassembly device for a valve seat ring of a diesel engine, comprising a workbench for fixing a cylinder head and a centering push rod vertically extending into the inner hole of a valve guide of the cylinder head, wherein a notch is processed in the axial direction at the head of the centering push rod, and a latch is symmetrically arranged in the notch, a swing rod is rotatably arranged on the latch, and the swing rod is composed of a long side segment and a short side segment, and when the swing rod swings around the latch until the two long side segments are in contact with each other, the swing rod is accommodated in the notch, and when the swing rod swings around the latch until the two short side segments are in contact with each other, the swing rod has a maximum opening angle;

[0005] By accommodating the rocker arm into the groove of the centering push rod, the centering push rod can be inserted into the inner hole of the valve guide. After that, the rocker arm swings to the maximum angle due to its own weight. In the process of moving upward with the centering push rod, the rocker arm pushes out the airtight seat ring.

[0006] Preferably, the swing arm is machined with an inclined surface at the free end of the long side segment, the inclined surface remains horizontal when the swing arm is fully opened, and the inclined surface acts on the lower part of the valve seat ring;

[0007] In the above technical solution, the thrust on the airtight seat ring is relatively uniform due to the sufficient surface contact between the inclined surface and the bottom surface of the airtight seat ring.

[0008] Preferably, a connecting flange is provided at the lower end of the centering push rod, and is connected to the piston rod of the oil cylinder through the connecting flange;

[0009] In the above technical solution, the oil cylinder provides thrust to the core push rod, and the force is large and stable.

[0010] The beneficial effects of the present invention compared with the prior art are as follows: the existing valve seat ring disassembly device basically forces the claws to expand and clamp the valve seat ring through the squeezing effect of the inclined surface, and then the valve seat ring is brought out with the linearly moving claws. The device is not convenient during use and the work efficiency is not high; in this solution, the core-fixing push rod can be inserted into the inner hole of the valve guide by accommodating the rocker arm into the groove of the core-fixing push rod, and then the rocker arm swings to the maximum angle due to its own weight, and in the process of moving upward with the core-fixing push rod, the rocker arm pushes out the airtight seat ring; the operation is convenient and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of a disassembly device for a valve seat ring of a diesel engine according to the present invention;

[0012] Figure 2 A top view of a disassembly device for a valve seat ring of a diesel engine according to the present invention;

[0013] Figure 3 is a schematic diagram of the device in use (the swing arm is accommodated in the notch);

[0014] Figure 4 Schematic diagram of the device in use (the pendulum is open).

[0015] In the figure: 1, connecting flange; 2, centering push rod; 21, notch; 3, latch; 4, rocker arm; 41, short side section; 42, long side section; 43, inclined surface; 5, valve guide; 6, cylinder head; 7, valve seat ring. DETAILED DESCRIPTION

[0016] like Figures 1 to 4 As shown, a disassembly device for a valve seat ring of a diesel engine according to an embodiment of the present invention comprises a workbench for fixing a cylinder head 6 and a centering push rod 2 vertically extending into the inner hole of a valve guide 5 of the cylinder head 6. A notch 21 is processed axially at the head of the centering push rod 2. A latch 3 is symmetrically arranged in the notch 21. A swing rod 4 is rotatably arranged on the latch 3. The swing rod 4 consists of a long side section 42 and a short side section 41. When the swing rod 4 swings around the latch 3 until the two long side sections 42 are in contact with each other, the swing rod 4 is accommodated in the notch 21. When the rocker arm 4 swings around the latch pin 3 until the two short side sections 41 are in contact with each other, the rocker arm 4 has the largest opening angle; the rocker arm 4 is processed with a bevel 43 at the free end of the long side section 42, and the bevel 43 remains horizontal when the rocker arm 4 is fully opened, and the bevel 43 acts on the lower part of the valve seat ring 7, so that the valve seat ring 7 is subjected to a uniform thrust; the lower end of the centering push rod 2 is provided with a connecting flange 1, and is connected to the piston rod of the cylinder through the connecting flange 1; the cylinder causes the centering push rod 2 to generate an upward thrust through the connecting flange 1.

[0017] The existing valve seat ring disassembly device basically forces the clamping claw to expand and clamp the valve seat ring through the squeezing effect of the inclined surface. After that, the valve seat ring is brought out with the clamping claw that moves linearly. The device is not convenient during use and the work efficiency is not high. In this solution, the core-fixing push rod can be inserted into the inner hole of the valve guide by accommodating the rocker arm into the groove of the core-fixing push rod. After that, the rocker arm swings to the maximum angle due to its own weight. In the process of moving upward with the core-fixing push rod, the rocker arm pushes out the airtight seat ring. The operation is convenient and the work efficiency is improved.

[0018] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0019] See also Figure 3 , the two swing rods are received in the notch 21 of the centering push rod, the oil cylinder pushes the centering push rod upward, and the swing rod extends into the inner hole of the valve guide along with the centering push rod, see Figure 4 When the latch completely passes through the upper edge of the valve guide, the two rocker arms swing due to their own weight until the two short side segments 41 are in contact and the rocker arms open to the maximum angle. After that, the rotation of the rocker arms is restricted, and the centering push rod continues to move upward so that the inclined surface 43 abuts against the lower surface of the valve seat ring 7. After that, the rocker arms push the valve seat ring out of the cylinder head. Personnel and equipment are prohibited from being above the cylinder head 6, and a cloth bag is set above the valve seat ring 7 to prevent the valve seat ring 7 from jumping out and injuring people.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A disassembly device for a valve seat ring of a diesel engine, characterized in that: The invention comprises a workbench for fixing a cylinder head (6) and a centering push rod (2) vertically extending into the inner hole of a valve guide (5) of the cylinder head (6); a notch (21) is processed axially on the head of the centering push rod (2); a latch pin (3) is symmetrically arranged in the notch (21); a swing rod (4) is rotatably arranged on the latch pin (3); the swing rod (4) is composed of a long side section (42) and a short side section (41); when the swing rod (4) swings around the latch pin (3) until the two long side sections (42) are in contact with each other, the swing rod (4) is accommodated in the notch (21); when the swing rod (4) swings around the latch pin (3) until the two short side sections (41) are in contact with each other, the swing rod (4) has a maximum opening angle.

2. The disassembly device for a valve seat ring of a diesel engine according to claim 1, characterized in that: The rocker arm (4) is machined with a bevel (43) at the free end of the long side section (42); the bevel (43) remains horizontal when the rocker arm (4) is fully opened, and the bevel (43) acts on the lower part of the valve seat ring (7).

3. The disassembly device for a valve seat ring of a diesel engine according to claim 1, characterized in that: The lower end of the centering push rod (2) is provided with a connecting flange (1), and is connected to the piston rod of the oil cylinder via the connecting flange (1).

Images