Special tool for dismantling positioning pin

Abstract

The utility model belongs to the technical field of machine manufacturing, and particularly relates to a tool special for dismantling a positioning pin. The special tool for dismantling the positioning pin comprises an internal thread fixing cap and a rapping mechanism, the internal thread fixing cap is matched with the external screw rod at the top of the positioning pin, one end of the internal thread fixing cap is open, and the other end of the internal thread fixing cap is a closed end face. A guide rod is fixed to the end face of the internal thread fixing cap, the other end of the guide rod is perpendicularly connected with a rapped disc, and the periphery of the guide rod is sleeved with a rapping mechanism. The rapping mechanism comprises a rapping handle and a rapping sleeving piece, the rapping sleeving piece comprises a sleeve, a flange plate I is fixed to one end face of the sleeve, and a flange plate II is fixed to the other end face of the sleeve. The number of the vibrating handles is two, and the vibrating handles are symmetrically fixed to the two sides of the sleeve. When the special tool is used for dismounting the positioning pin, time and labor are saved, and safety and convenience are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing, and specifically relates to a special tool for removing a positioning pin. Background Art

[0002] A turbine is a machine that converts the energy contained in a fluid medium into mechanical energy, also known as a turbine or turbine. The most important component of a turbine is a rotating element, namely a rotor, or impeller, which is installed on the turbine shaft and has blades evenly arranged along the circumference. The energy of the fluid is converted into kinetic energy when it flows through the nozzle. When it flows through the impeller, the fluid impacts the blades, pushing the impeller to rotate, thereby driving the turbine shaft to rotate. The turbine shaft drives other machinery directly or through a transmission mechanism to output mechanical work. The working fluid of a turbine machine can be a gas, such as steam, gas, air and other gases or mixed gases, or a liquid, such as water, oil or other liquids. A turbine with water as the working fluid is called a water turbine; a turbine with steam as the working fluid is called a steam turbine; a turbine with gas as the working fluid is called a gas turbine.

[0003] The locating pin is an important component installed on mechanical equipment to limit the freedom of movement of objects. It is widely used in mechanical equipment such as turbines and water pumps. When inspecting or repairing the turbine of the power generation system, it is necessary to remove the locating pin connecting the pistol plate and the lower adjustment cylinder. Since the locating pin and its accessories are tightly matched and have been corroded for a long time, it is very difficult to remove, which seriously affects the progress of the inspection. However, there is currently no special disassembly tool. If forced disassembly is performed, the locating pin will be damaged, causing abnormal vibration and other problems during the operation of the turbine, thereby affecting the safe and stable operation of the turbine.

[0004] Therefore, it is urgent to design a special disassembly tool suitable for the positioning pin, which can effectively solve the problem of removing the positioning pin and avoid damage to the positioning pin. Utility Model Content

[0005] The utility model aims to provide a special tool for removing the positioning pin in view of the difficulty in removing the positioning pin at present. The positioning pin can be removed by using the special tool, which is time-saving, labor-saving, safe and convenient.

[0006] The technical solution of the utility model is: a special tool for removing a positioning pin, comprising an inner thread fixing cap and a vibration mechanism.

[0007] The inner thread fixing cap matches the outer screw rod at the top of the positioning pin, one end of the inner thread fixing cap is open, and the other end is a closed end face; the inner thread of the inner thread fixing cap is close to one end of the end face, and the total length of the inner thread accounts for 35%-40% of the total length of the inner thread fixing cap. The opening of the inner thread fixing cap is covered on the outer screw rod at the top of the positioning pin, and then the inner thread inside is screwed and fixed to the outer screw rod. The designed total length of the inner thread matches the outer screw rod at the top of the positioning pin.

[0008] A guide rod is fixed on the end surface of the inner thread fixing cap, and the other end of the guide rod is vertically connected to the vibrated disk, and the outer periphery of the guide rod is sleeved with a vibrating mechanism. The center point of the vibrated disk is vertically connected to the guide rod. The guide rod and the inner thread fixing cap can be fixed by welding. Similarly, the guide rod and the vibrated disk can also be fixed by welding.

[0009] The rapping mechanism includes a rapping handle and a rapping sleeve, and the rapping sleeve includes a sleeve, a flange I is fixed at one end face of the sleeve, and a flange II is fixed at the other end face of the sleeve; wherein the inner diameters of the flange I and the flange II are the same, and the outer diameters are different; the inner diameters of the flange I, the flange II and the sleeve are all the same. The flange I and the flange II are welded to the two end faces of the sleeve respectively.

[0010] There are two rapping handles, which are symmetrically fixed on both sides of the sleeve. The two rapping handles can be vertically welded on both sides of the sleeve.

[0011] Furthermore, the length-to-diameter ratio of the inner thread fixing cap in the special tool for removing the positioning pin is 4: 1. The inner thread fixing cap with this length-to-diameter ratio can better match the outer threaded rod at the top of the positioning pin.

[0012] Furthermore, the inner thread hole diameter specification of the inner thread fixing cap in the special tool for removing the locating pin is M16.

[0013] Furthermore, the vibrated disk in the special tool for removing the positioning pin is in the shape of a circular disk.

[0014] Furthermore, the diameter ratio of the guide rod in the positioning pin removal special tool to the sleeve is 1:1.5-2. According to research, the design of this diameter ratio can ensure that the rapping mechanism moves smoothly upward along the guide rod to complete the rapping.

[0015] Furthermore, the difference in outer diameters between flange I and flange II in the special tool for removing the locating pin is 25-30 mm.

[0016] Furthermore, the outer diameters of flange I and flange II in the special tool for removing the locating pin are both larger than the outer diameter of the sleeve.

[0017] Furthermore, flange I in the special tool for removing the locating pin is located on the side close to the vibrated disk, and flange II is located on the side close to the inner thread fixing cap; the outer diameter of flange I is larger than the outer diameter of flange II, and the diameter of the vibrated disk is larger than the outer diameter of flange I. The design that the diameter of the vibrated disk is larger than the outer diameter of flange I can make the impact force of the vibration act more concentratedly on the vibrated disk, and then transmit the greater impact force to the locating pin through the guide rod and the inner thread fixing cap, making the locating pin easier to remove. The design that the outer diameter of flange I is larger than the outer diameter of flange II can effectively reduce the resistance of the vibrating mechanism to the upward operation, making the operation of the vibrating mechanism more labor-saving.

[0018] The beneficial effects of the utility model are as follows: the special tool for removing the locating pin described in the present invention is specially designed according to the characteristics of the locating pin. First, the vibrating mechanism is sleeved on the outer periphery of the guide rod through the sleeve in the vibrating mechanism, and then the inner thread fixing cap is screwed and fixed through the inner thread and the outer screw on the top of the locating pin; then the operator holds the vibrating handle in the vibrating mechanism and lifts the vibrating mechanism upward to impact and vibrate the vibrated disk. The upward vibrating force formed by the vibrating mechanism and the vibrated disk is transmitted to the locating pin through the guide rod and the inner thread fixing cap, thereby taking the locating pin out upward. The special tool for removing the locating pin effectively solves the problem of removing the locating pin and avoids damage to the locating pin, and improves the maintenance efficiency. At the same time, it also ensures the maintenance progress and quality, and further ensures the efficient operation of the power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the special tool for removing the positioning pin described in the specific implementation manner of the utility model.

[0020] Among them, 1 is an inner thread fixing cap, 2 is a guide rod, 3 is a vibrated plate, 4 is a vibrating handle, 5 is a sleeve, 6 is a flange I, and 7 is a flange II. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0022] Example 1

[0023] The special tool for removing the positioning pin comprises an inner thread fixing cap 1 and a rapping mechanism.

[0024] The inner thread fixing cap 1 matches the outer screw rod at the top of the positioning pin. One end of the inner thread fixing cap 1 is open and the other end is a closed end face. The inner thread of the inner thread fixing cap 1 is close to one end of the end face. The inner thread fixing cap 1 is made as follows: a round steel with a diameter of 20mm and a length of 80mm is used. After drilling a hole to 50mm at one end, tapping is started. The total length of the inner thread is 30mm (the total length of the inner thread accounts for 37.5% of the total length of the inner thread fixing cap). The aperture specification of the inner thread is M16, which is convenient for matching and connecting with the outer screw rod at the top of the positioning pin.

[0025] A guide rod 2 is welded on the end surface of the inner thread fixing cap 1, a vibration plate 3 is vertically welded on the other end of the guide rod 2, and a vibration mechanism is sleeved on the outer periphery of the guide rod 2. A steel pipe with a diameter of 18 mm and a length of 600 mm is used as the guide rod 2.

[0026] A steel plate with a thickness of 10 mm is used to process a disc-shaped vibration plate 3 with a diameter of 110 mm. The center point of the vibration plate 3 is vertically welded to one end of the guide rod 2.

[0027] The rapping mechanism comprises a rapping handle 4 and a rapping sleeve. The rapping sleeve comprises a sleeve 5. A steel pipe with an outer diameter of 35 mm and a thickness of 2 mm is used as the sleeve 5.

[0028] A flange Ⅰ6 is welded at one end surface of the sleeve 5, and the flange Ⅰ6 is located at an end close to the rapped plate 3. The outer diameter of the flange Ⅰ6 is 105 mm, and the inner diameter is 33 mm.

[0029] A flange II 7 is welded at the other end face of the sleeve 5, and the flange II 7 is located at the end close to the inner thread fixing cap 1. The outer diameter of the flange II 7 is 75 mm, and the inner diameter is 33 mm.

[0030] There are two rapping handles 4 , both of which are made of a steel pipe with a diameter of 20 mm and a length of 400 mm. The two rapping handles 4 are symmetrically and vertically welded on both sides of the sleeve 5 .

[0031] When disassembling the locating pin, first sleeve the rapping mechanism onto the outside of the guide rod 2 through the sleeve 5, then screw the inner thread fixing cap 1 into the outer thread rod at the top of the locating pin and tighten it tightly. One person uses both hands or two people hold the two rapping handles 4 on the rapping mechanism at the same time, lift the rapping mechanism upwards, and rap the rapped disk 3 to remove the locating pin upwards.

Claims

1. A special tool for removing positioning pins, characterized in that: Including an inner thread fixing cap and a rapping mechanism; The inner thread fixing cap matches the outer thread rod at the top of the positioning pin, one end of the inner thread fixing cap is open, and the other end is a closed end face; the inner thread of the inner thread fixing cap is close to one end of the end face, and the total length of the inner thread accounts for 35%-40% of the total length of the inner thread fixing cap; A guide rod is fixed on the end surface of the inner thread fixing cap, the other end of the guide rod is vertically connected to the vibrating plate, and the outer periphery of the guide rod is sleeved with a vibrating mechanism; The rapping mechanism comprises a rapping handle and a rapping sleeve, the rapping sleeve comprises a sleeve, a flange I is fixed at one end face of the sleeve, and a flange II is fixed at the other end face of the sleeve; wherein the inner diameters of the flange I and the flange II are the same, and the outer diameters are different; the inner diameters of the flange I, the flange II and the sleeve are all the same; There are two rapping handles, which are symmetrically fixed on both sides of the sleeve.

2. The special tool for removing the positioning pin according to claim 1, characterized in that: The length-to-diameter ratio of the inner thread fixing cap is 4:

1.

3. The special tool for removing the positioning pin according to claim 1, characterized in that: The inner thread hole diameter specification of the inner thread fixing cap is M16.

4. The special tool for removing the positioning pin according to claim 1, characterized in that: The vibrated disk is in the shape of a circular disk.

5. The special tool for removing the positioning pin according to claim 1, characterized in that: The diameter ratio of the guide rod to the sleeve is 1:1.5-2.

6. The special tool for removing the positioning pin according to claim 1, characterized in that: The difference in outer diameter between flange I and flange II is 25-30 mm.

7. The special tool for removing the positioning pin according to claim 1, characterized in that: The outer diameters of the flange I and the flange II are both larger than the outer diameter of the sleeve.

8. The special tool for removing the positioning pin according to claim 1, characterized in that: The flange I is located on the side close to the vibrated disk, and the flange II is located on the side close to the inner thread fixing cap; the outer diameter of the flange I is larger than the outer diameter of the flange II, and the diameter of the vibrated disk is larger than the outer diameter of the flange I.

Images