Marine diesel engine piston manhole cover plate mechanism

Abstract

The utility model provides a cover plate mechanism for a piston manhole of a marine diesel engine, which belongs to the technical field of marine diesel engines and comprises a cover plate body, a handle hole is arranged at the axis of the cover plate body, a T-shaped handle is arranged in the handle hole, the bottom end of the T-shaped handle is fixedly connected with an elliptical cam, and the elliptical cam is fixedly connected with the piston manhole of the marine diesel engine. Two telescopic plates are symmetrically arranged on the bottom face of the cover plate body and are in sliding connection with the bottom face of the cover plate body, and the opposite ends of the two telescopic plates make contact with the outer surface of the oval cam. The maintenance hole cover plate can be quickly disassembled and assembled, and the maintenance efficiency of the marine diesel engine piston is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of marine diesel engines, in particular to a marine diesel engine piston inspection hole cover plate mechanism. Background Art

[0002] The piston of a marine diesel engine needs to be regularly inspected. Since the marine diesel engine is usually installed under a walkway, an inspection hole is usually opened on the walkway to facilitate the inspection of the diesel engine piston. When inspection is required, a cover is set on the inspection hole to prevent foreign matter from falling into the inspection hole.

[0003] The existing cover is generally a cut circular plate, which is fixed to the support beam below by bolts to close the inspection hole. However, due to floor vibration or excessive disassembly times, the bolt hole is prone to thread slippage, seriously affecting the inspection efficiency. Utility Model Content

[0004] In view of the defects or shortcomings in the prior art, the utility model provides a marine diesel engine piston inspection hole cover plate mechanism, which can realize the rapid disassembly and installation of the inspection hole cover plate and improve the inspection efficiency of the marine diesel engine piston.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An embodiment of the utility model provides a cover plate mechanism for a marine diesel engine piston inspection hole, comprising a cover plate body, a handle hole being opened at the axis of the cover plate body, a T-shaped handle being placed in the handle hole, an elliptical cam being fixedly connected to the bottom end of the T-shaped handle, two telescopic plates being symmetrically arranged on the bottom surface of the cover plate body, the two telescopic plates being slidably connected to the bottom surface of the cover plate body, and opposite ends of the two telescopic plates being in contact with the outer surface of the elliptical cam.

[0007] Furthermore, it also includes a walkway bottom plate, a reinforcement plate and a reinforcement ring. The reinforcement plate is arranged between the walkway bottom plate and the reinforcement ring, and an inspection hole is opened on the walkway bottom plate.

[0008] Furthermore, two reinforcing plates are provided, both of which are U-shaped structures, symmetrically welded on the bottom surface of the pillow block bottom plate, and a set distance is spaced between the two reinforcing plates.

[0009] Furthermore, the openings of the two reinforcing plates are arranged opposite to each other, so that a circular hole is formed between the two reinforcing plates, and the diameter of the circular hole is smaller than the diameter of the inspection hole on the walkway bottom plate.

[0010] Furthermore, the reinforcement ring is welded directly below the reinforcement plate, and the cross section of the reinforcement ring is a circular ring, and the inner diameter thereof is the same as the diameter of the circular hole formed by the two reinforcement plates.

[0011] Furthermore, the axis of the inspection hole, the axis of the circular hole and the axis of the reinforcement ring coincide with each other.

[0012] Furthermore, a repair welding plate is provided at the bottom of the handle hole, and the repair welding plate is welded and fixed to the bottom surface of the cover plate body.

[0013] Furthermore, the elliptical cam is fixed to the end of the vertical rod through a nut, and a first return spring is arranged between the elliptical cam and the repair welding plate.

[0014] Furthermore, the telescopic plate includes a horizontal plate and a vertical plate, the horizontal plate is slidably connected to the cover plate body through a limit block, and the vertical plate is fixed to one end of the horizontal plate close to the elliptical cam.

[0015] Furthermore, the two vertical plates are connected via a second return spring.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model arranges an elliptical cam at the bottom end of the T-shaped handle, and symmetrically arranges two telescopic rods on the bottom surface of the cover plate body, the telescopic rod is slidably connected to the cover plate body, one end of the telescopic rod is in contact with the outer surface of the elliptical cam, the elliptical cam is rotated by the T-shaped handle to drive the telescopic rod to move, and the cover plate fixing mechanism is cooperated to realize the rapid installation and disassembly of the cover plate body, without the need to use bolts, avoiding the difficulty of disassembling and assembling the cover plate due to thread slippage of the bolt holes, and improving the maintenance efficiency of the marine diesel engine piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the bottom surface structure of the inspection hole cover mechanism in the embodiment of the utility model;

[0019] Figure 2 It is a side structural diagram of the inspection hole cover plate mechanism in the embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the cover plate fixing mechanism in the embodiment of the utility model;

[0021] Figure 4 This is a top view of the cover opening and closing mechanism in the embodiment of the utility model;

[0022] Figure 5 This is a side view of the cover opening and closing mechanism in the embodiment of the utility model;

[0023] Figure 6 This is a diagram showing the connection relationship between the T-shaped handle and the elliptical cam in the embodiment of the utility model;

[0024] Among them, 1. Cover fixing mechanism; 2. Cover opening and closing mechanism; 3. Walkway bottom plate; 4. Reinforcement plate; 5. Reinforcement ring; 6. Fixing hole; 7. Cover body; 8. Handle hole; 9. Handle placement hole; 10. Repair welding plate; 11. T-shaped handle; 12. Elliptical cam; 13. Nut; 14. First reset spring; 15. Telescopic plate; 16. Limit block; 17. Fixing nut; 18. Second reset spring; 19. Reinforcement plate. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] A typical implementation of the present utility model is as follows Figure 1 and Figure 2 As shown, a cover plate mechanism for a marine diesel engine piston inspection hole includes a cover plate fixing mechanism 1 and a cover plate opening and closing mechanism 2. Through the cooperation of the cover plate fixing mechanism 1 and the cover plate opening and closing mechanism 2, the cover plate can be fixed on the piston inspection hole and can be opened and closed arbitrarily.

[0027] like Figure 3 As shown, the cover plate fixing mechanism 1 includes a walkway bottom plate 3, a reinforcement plate 4 and a reinforcement ring 5. The reinforcement plate 4 is arranged between the walkway bottom plate 3 and the reinforcement ring 5, and an inspection hole is opened on the walkway bottom plate 3.

[0028] Two reinforcing plates 4 are provided, both of which are U-shaped structures, symmetrically welded on the bottom surface of the walkway bottom plate 3, and a set distance is set between the two reinforcing plates 4. The openings of the two reinforcing plates 4 are relatively arranged to form a circular hole between the two reinforcing plates 4, and the diameter of the circular hole is smaller than the diameter of the inspection hole on the walkway bottom plate 3.

[0029] The reinforcing ring 5 is welded just below the reinforcing plate 4. The cross section of the reinforcing ring 5 is annular, and its inner diameter is the same as the diameter of the circular hole formed by the two reinforcing plates 4. The axis of the inspection hole, the axis of the circular hole and the axis of the reinforcing ring 5 coincide with each other.

[0030] Fixing holes 6 are formed between the two ends of the gap between the two reinforcing plates 4 and the platform bottom plate 3 and the reinforcing ring 5 for realizing the opening and closing of the cover plate through the cover plate opening and closing mechanism 2 .

[0031] Specifically, Figure 4 and Figure 5As shown, the cover opening and closing mechanism 2 includes a cover body 7, which is circular and has a diameter the same as that of the inspection hole, so that the cover body 7 can be placed in the inspection hole and ensure that the upper surface of the cover body 7 is flush with the upper surface of the walkway bottom plate 3. A handle hole 8 is provided on the cover body 7, and the handle hole 8 is circular. The axis of the handle hole 8 coincides with the axis of the cover body 7. Handle placement holes 9 are symmetrically arranged on both sides of the handle hole 8. Both handle placement holes 9 are long strip holes, and one end of the handle placement hole 9 is connected with the handle hole 8. A repair plate 10 is provided at the bottom of the handle hole 8. The repair plate 10 is welded and fixed to the bottom surface of the cover body 7, and is used to block the handle hole 8 and the bottom of the handle placement hole 9 to prevent foreign matter from falling into the inspection port from the handle hole 8.

[0032] A through hole is provided on the repair welding plate 10, and the axis of the through hole coincides with the axis of the handle hole 8. A T-shaped handle 11 is placed in the handle hole 8. The vertical rod of the T-shaped handle 11 passes through the handle hole 8 and the through hole in sequence, and extends to the bottom of the repair welding plate 10. The two ends of the cross rod of the T-shaped handle 11 can be respectively placed in the handle placement holes 9 on both sides of the handle hole 8.

[0033] like Figure 6 As shown, an elliptical cam 12 is provided at one end of the vertical rod of the T-shaped handle 11 away from the horizontal rod. The elliptical cam 12 is fixed to the end of the vertical rod by a nut 13. A first return spring 14 is provided between the elliptical cam 12 and the repair welding plate 10. By providing the first return spring 14, it is ensured that the T-shaped handle 11 is stably placed in the handle hole 8 and the handle placement hole 9.

[0034] A telescopic plate 15 is provided on the lower surface of the cover body 7. There are two telescopic plates 15, which are symmetrically arranged. Both telescopic plates 15 are slidably connected to the lower surface of the cover body 7. Specifically, the telescopic plate 15 is a "┐"-shaped structure, including a horizontal plate and a vertical plate. A plurality of limit blocks 16 are provided on the bottom surface of the cover body 7. The limit blocks 16 are a "C"-shaped structure with an opening downward. One end of the horizontal plate away from the vertical plate passes through the plurality of limit blocks 16 in sequence and is slidably connected to the limit blocks 16, thereby utilizing the limit blocks 16 to realize a sliding connection between the telescopic plate 15 and the cover body 7.

[0035] The vertical plate is fixed to one end of the cross bar close to the elliptical cam 12, the two vertical plates are arranged opposite to each other, and the elliptical cam 12 is located between the two vertical plates.

[0036] A fixing nut 17 is provided at one end of the vertical plate away from the horizontal plate, and a second return spring 18 is connected between the two vertical plates via the fixing nut 17. Under the action of the second return spring 18, the side walls of the two vertical plates are pressed against the outer wall of the elliptical cam 12. When the elliptical cam 12 rotates, the two vertical plates slide along the outer wall of the elliptical cam 12, thereby realizing the two telescopic plates 15 approaching or moving away from each other.

[0037] A reinforcing plate 19 is provided between the horizontal plate and the vertical plate, the top surface of the reinforcing plate 19 is fixedly connected to the horizontal plate, and the side surface of the reinforcing plate 19 is fixedly connected to the vertical plate, thereby improving the structural strength of the telescopic plate 15. The length of the reinforcing plate 19 is shorter than the length of the horizontal plate, so that the reinforcing plate 19 does not affect the lateral movement of the horizontal plate.

[0038] The width of one end of the horizontal plate away from the vertical plate is the same as the width of the gap between the two reinforcing plates 4. When the two vertical plates are away from each other, the end of the horizontal plate away from the vertical plate can be inserted into the fixing hole 6, thereby fixing the cover plate body 7.

[0039] How it works

[0040] When installing the cover plate, lift the T-shaped handle upward through the handle hole, and then rotate the T-shaped handle 90°, thereby driving the elliptical cam below the T-shaped handle to rotate 90°, and the vertical plate on the telescopic plate slides along the outer edge of the elliptical cam, so that the two telescopic plates are close to each other, so that the end of the horizontal plate of the telescopic plate away from the vertical plate is retracted into the bottom of the cover plate body;

[0041] At this time, place the cover opening and closing mechanism on the cover fixing mechanism, the end of the telescopic plate horizontal plate away from the vertical plate is facing the fixing hole, and the T-shaped handle is rotated in the opposite direction, and the end of the telescopic plate horizontal plate away from the vertical plate extends out of the bottom of the cover body and is inserted into the fixing hole, thereby closing the cover;

[0042] When the cover plate needs to be removed, the T-shaped handle is rotated in the above manner to retract the two ends of the telescopic plate to the bottom of the cover plate body, and the cover plate can be taken out.

[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A marine diesel engine piston inspection hole cover plate mechanism, characterized in that: It includes a cover body, a handle hole is opened at the axis of the cover body, a T-shaped handle is placed in the handle hole, the bottom end of the T-shaped handle is fixedly connected to an elliptical cam, and two telescopic plates are symmetrically arranged on the bottom surface of the cover body, the two telescopic plates are slidably connected to the bottom surface of the cover body, and the opposite ends of the two telescopic plates are in contact with the outer surface of the elliptical cam.

2. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 1, characterized in that: It also includes a walkway bottom plate, a reinforcement plate and a reinforcement ring. The reinforcement plate is arranged between the walkway bottom plate and the reinforcement ring, and an inspection hole is opened on the walkway bottom plate.

3. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 2, characterized in that: There are two reinforcing plates, both of which are U-shaped structures, symmetrically welded on the bottom surface of the pillow block bottom plate, and a set distance is spaced between the two reinforcing plates.

4. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 3, characterized in that: The openings of the two reinforcing plates are arranged opposite to each other so that a circular hole is formed between the two reinforcing plates, and the diameter of the circular hole is smaller than the diameter of the inspection hole on the bottom plate of the walkway.

5. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 4, characterized in that: The reinforcement ring is welded directly below the reinforcement plate. The cross section of the reinforcement ring is a circular ring, and the inner diameter of the reinforcement ring is the same as the diameter of the circular hole formed by the two reinforcement plates.

6. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 5, characterized in that: The axes of the inspection hole, the circular hole and the reinforcement ring coincide with each other.

7. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 1, characterized in that: A repair welding plate is arranged at the bottom of the handle hole, and the repair welding plate is fixed to the bottom surface of the cover plate body by welding.

8. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 7, characterized in that: The elliptical cam is fixed to the end of the vertical rod through a nut, and a first reset spring is arranged between the elliptical cam and the repair welding plate.

9. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 1, characterized in that: The telescopic plate comprises a horizontal plate and a vertical plate. The horizontal plate is slidably connected to the cover plate body through a limit block, and the vertical plate is fixed to one end of the horizontal plate close to the elliptical cam.

10. A marine diesel engine piston inspection hole cover plate mechanism as claimed in claim 9, characterized in that: The two vertical plates are connected via a second return spring.

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