Bullet rust removal mechanism and bullet rust removal machine

Abstract

The bullet rust removal mechanism provided by the present invention includes a bullet and a driving mechanism. The bullet performs linear reciprocating motion under the drive of the driving mechanism to repeatedly strike the surface to be rusted; one end of the bullet away from the driving mechanism is a cutter head for rust removal. If the bullet is worn, the wear of the bullet can be observed intuitively, so the worn bullet can be replaced as needed, without having to replace iron shots in batches regularly like a shot blasting rust removal machine. Since the bullet strikes the surface to be rusted with one end face, and its material is much harder than sand, it will not be seriously worn, and thus there will be no problem of dust flying to pollute the environment; and since the bullet is rusted by repeatedly striking the surface to be rusted, the number of times different parts of the surface to be rusted will not be exactly the same, and since it is struck with a larger bullet end face, it will naturally not cause the problem of the surface roughness of the surface to be rusted being too small and too smooth after rust removal.

Description

Technical Field

[0001] The invention relates to the field of rust removers, in particular to a bullet rust removal mechanism and a bullet rust remover. Background Art

[0002] At present, the rust removal machines on the market can be mainly divided into shot blasting rust removal machines and sand blasting rust removal machines.

[0003] The shot blasting machine mainly uses the high-speed operation of mechanical equipment to throw out steel shots of a certain size by the centrifugal force of the blasting head mechanism. The thrown steel shots collide violently with the surface to be derusted, thereby removing the rust on the surface to be derusted. The steel shots used are generally cast iron shots. Cast iron shots are formed by spraying and rapidly cooling molten iron water to form iron shots with a particle size of 0.8 to 5 mm, and the surface is very round. However, the durability of cast iron shots is poor. After repeated impacts during the shot blasting process, the cast iron shots will continue to wear, resulting in a poor rust removal effect. Due to the small size of cast iron shots, it is impossible to screen out the bad iron shots alone. Even if only some of the cast iron shots are severely worn, it is necessary to replace the entire batch of cast iron shots after a certain number of uses, which is very expensive.

[0004] Sandblasting is a rust removal method that uses high-pressure air to bring out quartz sand and spray it onto the surface of the component. The sources of quartz sand include river sand, sea sand and artificial sand. Sand has low cost and wide sources, but in the process of rust removal, due to violent collision with the surface to be rusted, the sand is worn into dust, which pollutes the environment greatly; sandblasting rust removal requires manual operation, and the surface roughness of the component after rust removal is small, which is not easy to meet the friction coefficient requirements of the component. In addition, sea sand also needs to be freed of salt before use. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention aims to provide a bullet rust removal mechanism and a bullet rust removal machine to solve the problem that the iron shots in the existing shot blasting rust removal machine need to be replaced in batches regularly due to severe wear, and the problem that sandblasting rust removal easily makes the roughness of the rust-removed surface too small and dust flies during rust removal to pollute the environment.

[0006] The bullet rust removal mechanism comprises a bullet and a driving mechanism. The bullet performs linear reciprocating motion under the drive of the driving mechanism to repeatedly strike the surface to be rusted. The end of the bullet away from the driving mechanism is a cutter head for rust removal.

[0007] Furthermore, it includes an open air cavity, the driving mechanism is communicated with the open air cavity, the driving mechanism is a gas distribution mechanism, the bullet can be movably embedded in the open air cavity, the side wall of the bullet abuts against the inner wall of the open air cavity so that the air pressure in the open air cavity is isolated from the atmosphere, the gas distribution mechanism introduces gas into the open air cavity to drive the bullet to hit the surface to be derusted, and the bullet rebounds after hitting the surface to be derusted.

[0008] Furthermore, it also includes a buffer air cavity; the open air cavity includes a guide tube and a piston cavity, the guide tube and the piston cavity are connected and communicated with each other, the bullet can be movably embedded in the guide tube, the side wall of the bullet abuts against the inner wall of the guide tube, so that the piston cavity is not connected with the atmospheric pressure; the piston cavity is provided with a pressurizing station, the guide tube is provided with a pressure relief station, and an air channel is provided between the buffer air cavity and the pressurizing station to communicate with the two; the bullet includes a bullet inner cavity, and an air hole communicating with the bullet inner cavity is opened on the side of the bullet; The air outlet of the gas distribution mechanism is connected with the buffer air cavity; when the bullet is in a natural state or when it retreats to the initial position, the position of the air hole corresponds to the pressurizing station; when the gas distribution mechanism pressurizes the buffer air cavity, gas enters from the air hole and fills the inner cavity of the bullet, and the bullet is driven forward along the guide tube by the air pressure of the piston cavity; when the bullet advances to the pressure relief station corresponding to the air hole, the air pressure in the inner cavity of the bullet leaks to the pressure relief station, and the bullet rebounds to the initial position after striking the surface to be derusted.

[0009] Furthermore, it also includes a first limiting portion and a second limiting portion, the first limiting portion is arranged on the bullet, and the second limiting portion is arranged in the open air cavity, and the first limiting portion and the second limiting portion are used to support each other when the bullet moves toward the air cavity mouth to the extreme position to prevent the bullet from slipping out of the open air cavity.

[0010] Furthermore, the first limiting portion is a wing; the inner diameter of the piston cavity is larger than the inner diameter of the guide tube, the guide tube and the piston cavity are connected by a connecting portion, and the connecting portion is the second limiting portion.

[0011] Furthermore, the pressurizing station is an annular groove arranged on the side wall of the piston chamber, and the pressure relief station is an annular groove arranged on the side wall of the guide tube.

[0012] Furthermore, the gas outlet of the gas distribution mechanism is staggered with the port of the airway.

[0013] Furthermore, the buffer air cavity is arranged between the open air cavity and the gas distribution mechanism, so that the connection line of the three is a straight line.

[0014] A bullet rust removal machine comprises the bullet rust removal mechanism described in any one of the above items.

[0015] Furthermore, it includes a linear motion drive mechanism that can drive the open air cavity to approach or move away from the surface to be derusted; it also includes a shock-absorbing spring, which is sleeved outside the open air cavity; it includes a negative pressure generating device and a rust block recovery port arranged on one side of the bullet, and the negative pressure generating device is connected to the rust block recovery port.

[0016] The bullet rust removal mechanism provided by the present invention achieves the rust removal effect by making the bullet repeatedly knock the surface to be rusted. If the bullet is worn, the wear of the bullet can be observed intuitively, so the worn bullet can be replaced as needed, without having to replace iron shots in batches regularly like a shot blasting rust removal machine. Since the bullet knocks the surface to be rusted with one end face, and its material is much harder than sand, it will not be seriously worn, so there will be no problem of flying sand and dust polluting the environment; and since the bullet is rusted by repeatedly knocking the surface to be rusted, the number of knocks on different parts of the surface to be rusted will not be exactly the same, and since it is knocked with a larger bullet end face, it will naturally not cause the problem of the surface roughness of the surface to be rusted being too small and too smooth after rust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall schematic diagram of the bullet rust remover when the bullet is facing downward;

[0018] Figure 2 This is a schematic diagram of the explosion of the warhead derusting machine;

[0019] Figure 3 It is a schematic diagram of the explosion when the warhead is installed in the open air cavity;

[0020] Figure 4 This is a schematic diagram of the internal structure of the warhead;

[0021] Figure 5 It is a cross-sectional schematic diagram of an open air cavity installed on a rust remover (the bullet and the buffer air cavity are not shown);

[0022] Figure 6 This is the overall schematic diagram of the bullet rust remover with the bullet facing upward.

[0023] In the figure: 20, bullet; 21, second air hole; 22, wing; 23, cutter head; 24, first air hole; 25, bullet inner cavity; 30, guide tube; 31, pressurizing station; 32, pressure relief station; 33, shock-absorbing spring; 34, airway; 35, buffer air cavity; 36, open air cavity; 37, connecting part; 38, piston cavity; 40, rust block recovery port; 41, negative pressure generating device; 42, travel drive mechanism; 43, valve mechanism. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0025] like Figure 1-6As shown, the rust removal mechanism mainly includes a bullet 20, an open air cavity 36, a buffer air cavity 35, a gas distribution mechanism 43, a shock absorbing device, a rust block recovery device, and a travel drive mechanism 42.

[0026] Reference Figure 3 and Figure 4 The open air cavity 36 includes a guide tube 30 and a piston cavity 38 at the lower part of the guide tube 30; the bullet 20 is installed in the guide tube 30 in a liftable manner, and the side wall of the bullet 20 fits the inner wall of the guide tube 30 so that the piston cavity 38 is not connected to the outside atmosphere. A buffer air cavity 35 is provided at the end of the piston cavity 38 away from the guide tube, and a pressurizing station 31 is provided in the piston cavity. A vertical air channel is provided in the side wall of the piston cavity, and one end of the air channel 34 is connected to the buffer air cavity, and the other end of the air channel is connected to the pressurizing station 31. A pressure relief station 32 is provided in the guide tube 30, and the pressure relief station 32 is connected to the atmospheric pressure; the pressurizing station 31 and the pressure relief station 32 are annular grooves.

[0027] The bullet 20 includes a bullet cavity 25. A cutter head 23 for rust removal is provided at the top of the bullet 20. The side wall of the bullet 20 is provided with air holes, which may include a first air hole 24 and a second air hole 21. When the bullet 20 is not actuated, the second air hole 21 corresponds to the pressurizing station 31, and the first air hole 24 is closed by the side wall of the guide tube in the guide tube 30, so that the bullet cavity and the piston cavity are isolated from the external atmosphere. Therefore, when the gas distribution mechanism 43 sprays and pressurizes the buffer gas cavity 35, the gas enters the pressurizing station 31 from the buffer gas cavity 35 through the gas passage 34 of the piston cavity 38, and the gas in the pressurizing station 31 enters the bullet cavity 25 from the second air hole 21, so that the air pressure of the bullet cavity 25 is equal to that of the piston cavity 38. At this time, the piston cavity 38 and The pressure difference of the outside atmospheric pressure pushes the bullet 20 toward the guide tube 30; the bullet 20 is pushed away from the piston cavity by the air pressure until the first air hole 24 corresponds to the pressure relief station 32, so that the gas in the bullet cavity 25 is released into the outside atmosphere; and because the second air hole 21 has left the pressurizing station and is closed by the inner wall of the guide tube, a certain pressure is maintained in the piston cavity, so when the bullet 20 rebounds after hitting the rust-removed surface, the piston cavity can act as an air cushion to prevent the bullet 20 from hitting the bottom of the buffer air cavity 35 when it rebounds. In order to ensure that the bullet 20 can return to the initial position every time it rebounds, that is, the position where the first air hole 24 corresponds to the pressurizing station 31, and to prevent the rebounding bullet 20 from hitting the buffer air cavity 35, a spring facing the bullet 20 is set in the buffer air cavity 35, and the bullet 20 hits the spring to decelerate when it rebounds, so that the second air hole 21 can correspond to the pressurizing station 31.

[0028] The piston cavity 38 is wide and the guide tube 30 is narrow, and the cross section is similar to a "convex" shape. The piston cavity 38 and the guide tube 30 are connected by a connecting portion 37 (second limiting portion), and the lower part of the bullet 20 is provided with a side wing 22 (first limiting portion). When the side wing 22 and the connecting portion 37 are raised, it is the limit position. The side wing 22 and the connecting portion 37 are against each other, so that the bullet cannot continue to rise. At this time, the blade 23 of the bullet 20 has extended out of the cavity of the open air cavity 36, and can reach the surface to be derusted for derusting. The purpose of the setting is to prevent the bullet 20 from slipping off the guide tube 30.

[0029] In the prior art, the gas distribution mechanism 43 is arranged on one side of the pressurizing station 31, and the gas is directly sprayed into the pressurizing station 31. The disadvantage of this is that the high-speed airflow will disturb the movement of the bullet 20, causing the speed of the bullet 20 to decrease, and the entire cycle of rebounding after ejection becomes longer, and the number of actuations of the bullet 20 per unit time becomes less, and the ideal rust removal effect cannot be achieved. Therefore, the present invention sets the gas distribution mechanism 43 below the buffer air cavity 35, and the connecting line of the buffer air cavity 35, the piston cavity 38, and the guide tube 30 is a straight line, and the gas outlet of the gas distribution mechanism 43 is staggered with the gas inlet of the airway 34, so that the buffer air cavity 35 plays a role of a first-level buffer, avoiding the kinetic energy of the ejected gas itself from directly interfering with the bullet 20, but driving the bullet 20 by air pressure, which is conducive to increasing the number of actuations of the bullet 20 per unit time.

[0030] The bullet rust remover includes a linear motion drive mechanism that can drive the open air cavity 36 to approach or move away from the surface to be rusted; it also includes a shock-absorbing spring 33, which is sleeved outside the open air cavity 36; it includes a negative pressure generating device 41 and a rust block recovery port 40 arranged on one side of the bullet 20, and the negative pressure generating device 41 is connected to the rust block recovery port 40.

[0031] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. Bullet rust removal mechanism, characterized by: It includes a bullet and a driving mechanism. The bullet moves back and forth in a straight line under the drive of the driving mechanism to repeatedly strike the surface to be derusted. One end of the bullet away from the driving mechanism is a cutter head for rust removal. It includes an open air cavity, the driving mechanism is in communication with the open air cavity, the driving mechanism is a gas distribution mechanism, the bullet can be movably embedded in the open air cavity, the side wall of the bullet abuts against the inner wall of the open air cavity so that the air pressure in the open air cavity is isolated from the atmosphere, the gas distribution mechanism introduces gas into the open air cavity to drive the bullet to hit the surface to be derusted, and the bullet rebounds after hitting the surface to be derusted; it also includes a buffer air cavity; the open air cavity includes a guide tube and a piston cavity, the guide tube and the piston cavity are connected and communicated with each other, the bullet can be movably embedded in the guide tube, the side wall of the bullet abuts against the inner wall of the guide tube, so that the piston cavity is not connected with the atmospheric pressure; the piston cavity is provided with a pressurizing station, the guide tube is provided with a pressure relief station, and an air channel is provided between the buffer air cavity and the pressurizing station to communicate with the two; the bullet includes a bullet inner cavity, and an air hole communicating with the bullet inner cavity is provided on the side of the bullet; The air outlet of the gas distribution mechanism is connected with the buffer air cavity; when the bullet is in a natural state or when it retreats to the initial position, the position of the air hole corresponds to the pressurizing station; when the gas distribution mechanism pressurizes the buffer air cavity, gas enters from the air hole and fills the inner cavity of the bullet, and the bullet is driven by the air pressure of the piston cavity to move forward along the guide tube; when the bullet moves to the pressure relief station corresponding to the air hole, the air pressure in the inner cavity of the bullet leaks to the pressure relief station, and the bullet rebounds to the initial position after hitting the surface to be derusted; a spring facing the bullet is provided on the buffer air cavity, and the spring is compressed by the rebounding bullet to buffer it; the buffer air cavity is arranged between the open air cavity and the gas distribution mechanism, so that the connecting line of the three is a straight line; the pressurizing station is an annular groove arranged on the side wall of the piston cavity, and the pressure relief station is an annular groove arranged on the side wall of the guide tube.

2. The bullet rust removal mechanism according to claim 1, characterized in that: It also includes a first limiting portion and a second limiting portion, wherein the first limiting portion is arranged on the bullet, and the second limiting portion is arranged in the open air cavity, and the first limiting portion and the second limiting portion are used to abut against each other when the bullet moves toward the air cavity mouth of the open air cavity to the extreme position, so as to prevent the bullet from slipping out of the open air cavity.

3. The bullet rust removal mechanism according to claim 2, characterized in that: The first limiting portion is a wing; the inner diameter of the piston cavity is larger than the inner diameter of the guide tube; the guide tube and the piston cavity are connected by a connecting portion, and the connecting portion is the second limiting portion.

4. The bullet rust removal mechanism according to claim 1, characterized in that: The gas outlet of the gas distribution mechanism is staggered with the port of the airway.

5. A bullet rust removal machine, comprising the bullet rust removal mechanism as claimed in any one of claims 1 to 4.

6. The bullet rust remover according to claim 5, characterized in that: It includes a linear motion drive mechanism that can drive the open air cavity to approach or move away from the surface to be derusted; it also includes a shock-absorbing spring, which is sleeved outside the open air cavity; it includes a negative pressure generating device and a rust block recovery port arranged on one side of the bullet, and the negative pressure generating device is connected to the rust block recovery port.

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