KR101310083B1 - Reciprocating air moter - Google Patents

Abstract

PURPOSE: A round trip pneumatic motor is provided to delay cooling time because residual air passes through an inhaling pipe, an exhaust pipe, and the surroundings of an upper and lower air pipe passages. CONSTITUTION: A round trip pneumatic motor includes a piston valve housing (9), a three-way valve shaped pilot valve, a valve cap (22), and a snap ring. The piston valve housing is combined to one side of a cylinder (1) along with a housing gasket. The three-way valve shaped pilot valve is inserted into the cylinder and a groove formed on one side of the upper part of a base (41) and moves a piston valve body upwards and downwards. The valve cap is in contact with one side of the pilot valve and fixes the valve. The snap ring is combined with the other side of the pilot valve and fixes the pilot valve.

Description

Reciprocating Air Moter

The present invention relates to a reciprocating air motor for a painting machine, and more particularly to a reciprocating air motor characterized by a small pulsation pressure difference according to the upper and lower pistons, and delaying the cooling time compared with the prior art.

Reciprocating air motors are well known in the field of coating equipment and are widely used. The reciprocating air motor is discharged at a temperature below freezing point due to throttling loss in the process of discharging air introduced into the cylinder.

Due to the temperature of the exhaust gas, water and ice are generated by freezing in the outlet port, the air line and the piston valve passage. In order to supply paint with a high pressure of 300 bar or more, a reciprocating air motor having a high compression ratio is used. When the high-compression ratio reciprocating air motor is used for a long time, the freezing phenomenon is promoted to slow down the operation of the reciprocating air motor or completely stop it. It is often done.

Once the reciprocating air motor is stopped, it may take several hours to melt the ice in the passage, and there is a problem in that the painting equipment must be disposed of by the curing of the paint remaining in the high pressure pump at that time. In addition, since the length of the air line supplied to the cylinder is different, there is a problem that the pulsation pressure difference due to the piston up and down stroke is very high, thereby lowering the painting work and work efficiency.

In order to solve the freezing phenomenon, the Republic of Korea Patent No. 0129630 discloses a method of delaying the cooling time of the entire cylinder by rotating the air flowing into the cylinder at the discharge air pressure around the cylinder. In a similar manner, Korean Patent Application Publication No. KR 10-2009-0033277 discloses that fins are provided with heat from a warm atmosphere to melt finned exhaust manifolds, silencers and ice that may form inside the manifolds during the exhaust cycle. Disclosed is a reciprocating air motor having an air valve including an air passage for drawing the warm atmosphere into the muffler so as to be conducted through a mold manifold.

In order to prevent freezing and reduce the pulsation pressure difference, Korean Patent No. KR 10-1187454 discloses improved control of the reciprocating air motor by minimizing changeover time and reducing the tendency of the valve to freeze. To provide a system that allows, Korean Patent Laid-Open Publication No. KR 10-2012-0014038 discloses a pilot valve in which a slide valve is added to a 4-way valve type.

The above technique is difficult to delay the freezing time, considering the exhaust air discharged at a very low temperature below freezing point (-100 to -60 ℃), it is more effective to discharge the ultra-low temperature exhaust gas as soon as possible . In addition, it is easy to switch 3-way valve type pilot valves and quick valves, rather than 4-way valve type pilot valves, and excellent durability.

Accordingly, the present invention seeks to solve the above problems and to provide a reciprocating air motor which can be manufactured easily and inexpensively.

KR 10-1994-0021927, 'Pumps with reciprocating air motors', published date: October 19, 1994. KR KR 0129630, 'Freezing Low Noise Air Working Pump', Registered Date: Nov. 11, 1997. 3. KR 10-2009-0033277, 'Anti-freeze noise reduction air motor exhaust', published date: 2009.04.01. 4. KR 10-1187454, 'Reciprocating piston pump with air valve, stop and puppet', registered date: 25 September 2012. 5. KR 10-2012-0014038, 'Pneumatically Actuated Pilot Valves', published date: 2012.02.15.

Accordingly, the present invention is to provide a reciprocating air motor in the reciprocating air motor for coating equipment, which can delay the cooling time more than twice as compared with the prior art, and the pulsation deviation is small according to the vertical movement of the piston. Purpose.

In order to achieve the above object, in the reciprocating air motor, the present invention provides a valve plate (3), a piston valve (4) for changing an air discharge line to the valve plate (3), and the piston valve (4). And a piston valve body 13 connected to the piston valve reciprocating up and down by the pilot valve 20, a roller 6 fastened to one side of the piston valve body 13, and smoothly moving the piston. A spring (5) fixed to one side of the valve (4) and imparting a constant pressure to the roller (6), a block (7) serving as a locking jaw in the shanghai movement of the piston valve body (13), and the piston The cylinder is inserted into the grooves formed at both sides of the valve body 13 to maintain the airtightness, the cylinder is provided with a U-packing 12, guides the shank-dong of the piston valve body 13, and has an air inlet 60 at one side thereof. (1) with piston housing gasket (2) on one side A piston valve housing 9 to be fastened; The valve housing 29 which forms a plurality of holes in the side surface portion in the form of a hollow pipe, the valve stem 27 penetrating the inside of the valve housing 29 and acts as a valve, and one of the valve stem 27 A valve seat 25 in contact with the side portion, a spring 24 connected between the valve seat 25 and the valve stem 27, and the valve stem 27 are engaged to open and close the intake pipe I. And a three-way valve type pilot valve including a poppet 26 and inserted into a groove formed at one side of the upper end of the cylinder 1 and the base 41 to move the piston valve body 13 up and down. 20); A valve cap 22 in contact with one side of the pilot valve 20 and fixed thereto; The present invention is to provide a reciprocating air motor having a snap ring 47 fastened to the other side of the pilot valve 20 to fix the pilot valve 20.

In addition, in the air line opening and closing by the pilot valve 20 inserted into the groove formed in the upper end side surface portion of the cylinder (1) and the base 41, the inlet pipe (I) for supplying compressed air; When opened by the pilot valve 20, the exhaust pipe for discharging the compressed air supplied to the intake pipe I and supplying the compressed air to the piston valve housing 9 to move the piston valve body 13 ( E); When the pilot valve 20 is closed, to provide a reciprocating air motor comprising a residual air discharge pipe (S) for discharging the air remaining in the exhaust pipe (E) to the outside.

In addition, the push shaft 14 is connected to both side portions of the piston valve body 13 so that the piston valve 4 can be moved manually; A push button 18 engaged with the push shaft 14 and penetrating the housing plug 16; The present invention is to provide a reciprocating air motor comprising a spring 17 for returning the push button 18.

In addition, as a method for delaying the freezing time,

First, the residual air discharge pipe S formed in the cylinder 1 and the base 41 is not discharged immediately, but passes around the intake pipe I, the exhaust pipe E, and upper and lower air passages 65 and 66. It is intended to provide a reciprocating air motor, characterized in that it is discharged, delaying the cooling time.

Second, when the reciprocating air motor is used for a long time, in order to discharge the moisture generated by the loss of throttling, the upper end shape of the piston 33 and the base 41 has an umbrella shape with a low edge around the piston shaft 35. To provide a reciprocating air motor characterized by.

Third, in the cylinder 1, in order to prevent the cooling of the surroundings formed with the upper air line 65 and the lower air line 66, one side of the cylinder formed with the upper air line 65 and the lower air line 66 To provide a reciprocating air motor, characterized in that it further comprises a vent (61) and the inclined portion (62).

The present invention is the biggest problem in the reciprocating air motor due to the following structure to delay the cold time, it is possible to perform long-term paint work.

1) A structure consisting of a vent and a slope formed around the cylinder air line

2) The shape of the upper part of the piston and the base is an umbrella-shaped structure with a low edge around the piston shaft, allowing easy discharge of moisture and ice cores easily generated in the cylinder.

3) Residual air discharge pipe is discharged while passing around the intake pipe, exhaust pipe and air line, and has a preheating effect with relatively warm air.

In addition, since the length of the air line supplied to the cylinder is constant up and down, there is no deviation of the pulsating pressure difference between the up and down of the piston to perform a stable coating work, there is an advantage to realize a constant coating film thickness .

In the case of the conventional reciprocating air motor, when the reciprocating air motor completely stops due to the problem of freezing during the painting operation, the high viscosity paint cannot be removed in the high pressure pump and is hardened in the high pressure pump to dispose of the entire coating equipment. Although frequently occurs, the present invention is composed of a push shaft, a push button and a spring 17 capable of manually operating the piston valve and the piston valve body to enable the initial driving of the reciprocating air motor, and the reciprocating air due to cooling problems Even if the motor is stopped, it is possible to temporarily remove the paint remaining in the high-pressure pump to minimize the damage to the painting equipment.

1 is a perspective view of a movable coating machine
Figure 2 is a perspective view of a preferred embodiment of the present invention reciprocating air motor.
3 is a side view of the reciprocating air motor.
Figure 4 is an exploded view of the components of the reciprocating air motor.
5 is a cross-sectional view of the reciprocating air motor.
6 is an internal configuration diagram of the piston valve housing 9.
7 is a flow chart of the in-cylinder air flow according to the vertical movement of the piston
8 is a diagram illustrating an internal configuration of the pilot valve 20.
9 is a state diagram of the pilot valve operation.
10 is a side view of the cylinder 1 and a detailed view of the residual air discharge pipe.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and the present invention is not necessarily limited to those shown in the drawings. In the drawings, the thickness is enlarged to clearly show various parts and regions. In the drawings, for convenience of description, packings and O-rings are not shown, and the thicknesses of parts or regions of components are exaggerated.

1 is a perspective view of a movable coating machine. When painting work on shipbuilding equipment or steel structures, high-pressure pump 81 for air-less (air-less) painting equipment to prevent the scattering of paint and high working efficiency.

As shown in FIG. 1, an airless high pressure pump uses a compressed air of 10 bar or less, and a reciprocating air motor that drives the high pressure pump 81 by vertically reciprocating the piston in the cylinder 1 ( 100 and the high-pressure pump 81 is fastened to the piston shaft 35 of the reciprocating air motor 100 to suction the paint through the paint inlet pipe 82 to displace the paint at a high pressure of 300 bar or more. It is connected to the high-pressure pump 81 and the hose 85 is composed of a spray gun 83 for spraying paint.

The reciprocating air motor 60 in the process of discharging the compressed air in the cylinder (1), the temperature decreases due to the loss of the throttling, the reciprocating air motor cools after a certain driving time, the cylinder and the air pipe to ice The cold problem that stops and stops is serious.

Due to the flammability of the paint, there is a need for a technique for delaying the freezing time since the heating element cannot be used at the cold freezing position.

Accordingly, it is an object of the present invention to provide a reciprocating air motor for a painting machine, which can delay the cooling time more than twice as compared with the prior art, and in which a pulsation deviation occurs due to the piston vertical movement.

Figure 2 is a perspective view of a preferred embodiment of the reciprocating air motor of the present invention, Figure 3 is a side view of the reciprocating air motor, Figure 4 is an exploded view of the components of the reciprocating air motor, Figure 5 is a cross-sectional view of the reciprocating air motor, 6 is an internal configuration diagram of the piston valve housing 9, Figure 7 is a flow chart of the in-cylinder air flow according to the piston vertical movement, Figure 8 is an internal configuration diagram of the pilot valve 20.

The present invention is a piston 33 for vertical reciprocating motion with compressed air, a piston shaft 35 coupled to the piston 33 to drive a high pressure pump 81, and guides the vertical movement of the piston 33. A cylinder (1), a base (41) fastened to the lower part of the cylinder (1) to form a high compression ratio together with the cylinder (1), and a piston valve (4) and a piston valve fastened to one side of the cylinder (1). A piston valve housing 9 for guiding the up and down movement of the body 13, a piston valve 4 for changing the upper air line 65 and the lower air line 66 to the cylinder 1, and the piston ( A pilot valve 20 for changing the upper air line 65 and the lower air line 66 by moving the piston valve 4 and the piston valve body 13 to switch the up and down movement of 33; In the reciprocating air motor including a hook (51) at the upper end of the cylinder (1), the valve plate (3) and And a piston valve 4 for changing an air discharge line to the valve plate 3, a piston valve body 13 connected to the piston valve 4 and reciprocating up and down by a pilot valve 20; , A roller 6 fastened to one side of the piston valve body 13 to smooth movement, and a spring 5 fixed to one side of the piston valve 4 to impart a constant pressure to the roller 6. And a block (7) serving as a locking jaw in the shanghai movement of the piston valve body (13), and a U-packing (12) inserted into a groove formed at both sides of the piston valve body (13). Piston valve housing (9) which guides the shangdong of the piston valve body (13) and has an air inlet (60) on one side and is fastened together with the piston housing gasket (2) on one side of the cylinder (1); ; The valve housing 29 which forms a plurality of holes in the side surface portion in the form of a hollow pipe, the valve stem 27 penetrating the inside of the valve housing 29 and acts as a valve, and one of the valve stem 27 A valve seat 25 in contact with the side portion, a spring 24 connected between the valve seat 25 and the valve stem 27, and the valve stem 27 are engaged to open and close the intake pipe I. And a three-way valve type pilot valve including a poppet 26 and inserted into a groove formed at one side of the upper end of the cylinder 1 and the base 41 to move the piston valve body 13 up and down. 20); A valve cap 22 in contact with one side of the pilot valve 20 and fixed thereto; It is characterized in that it is provided with a snap ring 47 is fastened to the other side of the pilot valve 20 to fix the pilot valve 20.

The snap ring 47 is preferably fixed to the pilot valve 20 is inserted into the groove formed in the upper side surface portion of the base 41.

The valve cap 22 is for fixing the pilot valve 20 to be inserted into the groove formed in the cylinder 1 and the upper one side surface of the base 41, it is preferable to screw the cylinder (1). .

The vent 61 is preferably provided at both side portions of the cylinder 1 to facilitate air discharge.

3 is a side view of the reciprocating air motor. 고압 The high pressure discharge air discharged from the return air motor 100 causes a temperature drop around the discharge port 63 due to the loss of throttling, and the phenomenon continues and starts to cool down around the discharge port 63. Cooling of water and ice generated in the furnaces 65 and 66 and the cylinder 1 begins.

The generated water and ice are gradually accumulated to block the pipes in the upper and lower air pipes 65 and 66 and the piston valve housing 9 to stop the reciprocating air motor.

In the present invention, as a method for delaying the freezing time, in the cylinder 1, as shown in Figure 3, in order to prevent the freezing around the upper air line 65 and the lower air line 66 formed around, It characterized in that it further comprises a vent port 61 and the inclined portion 62 in one side portion formed with the upper air line 65 and the lower air line 66 of the cylinder.

With the above configuration, when the reciprocating air motor is operated, it has an effect of delaying the cooling time to a relatively warm ambient air temperature around the upper air line 65 and the lower air line 66 where cold air is first generated.

In addition, to smooth the air flow, it is preferable to form the inclined surface 62 around the ventilation opening 61.

The present invention is a structure for delaying the freezing time, as shown in Figure 5, in order to discharge the water or ice core generated in the cylinder, the upper end shape of the piston 33 and the base 41 is the piston shaft It is characterized in that the shape of the umbrella with a low edge around the center (35).

In the above configuration, the present invention collects the piston 33 to the base 41 at the upper end even when moisture or ice cores are generated in the cylinder 1, and delays the cooling time of the cylinder with a structure that is easily discharged with the discharged air. It has an effect.

5 is a cross-sectional view of the reciprocating air motor, Figure 7 is a flow chart of the in-cylinder air flow according to the vertical movement of the piston.

The piston 33 is compressed to the outer diameter of the piston shaft (35) relative to the stroke volume while moving up and down in the cylinder (1) to form a high pressure, the high pressure pump 81 is fastened to the piston shaft (35) Let it work

As shown in FIGS. 5 to 7, the air flowing into the cylinder 1 and the discharged air flow are formed through the upper air line 65 and the lower air line 66, and the inflow of compressed air into the cylinder. The over discharge is changed by the piston valve 4 and the piston valve body 13 in the piston valve housing 9.

The compressed air supplied to the reciprocating air motor 100 passes through the upper air line 65 through the lower air line 66 through the pipeline formed by the piston valve housing 9 and the piston valve body 13, and then the cylinder 1. Is supplied.

The supplied compressed air causes the piston 33 to swing. At this time, the air opposite the piston is discharged to the discharge port 63 through the upper air line 65 to the lower air line 66.

8 is a diagram illustrating an internal configuration of the pilot valve 20, and FIG. 9 is a diagram illustrating an operation state of the pilot valve 20.

As shown in FIG. 9, the present invention provides compressed air in an air line opened and closed by a pilot valve 20 inserted into a groove formed at one side of the upper end of the cylinder 1 and the base 41. An intake pipe I; When opened by the pilot valve 20, the exhaust pipe for discharging the compressed air supplied to the intake pipe I and supplying the compressed air to the piston valve housing 9 to move the piston valve body 13 ( E); When the pilot valve 20 is closed, it is characterized in that it consists of a residual air discharge pipe (S) for discharging the air remaining in the exhaust pipe (E) to the outside.

10 is a side view of the cylinder 1 and a detailed view of the residual air discharge pipe.

The present invention is another structure for delaying the freezing time, as shown in Figure 10, the residual air discharge pipe (S) formed in the cylinder (1) and the base 41 is not immediately discharged, the intake pipe ( I), discharged while passing around the exhaust pipe (E) and the upper and lower air passages (65, 66), characterized in that to delay the cooling time.

When the reciprocating air motor stops completely due to the freezing problem during the paint operation, the paint of high viscosity cannot be removed in the high pressure pump, it hardens in the high pressure pump, and the whole paint equipment is often discarded.

In addition, in the configuration of the present invention, when the piston valve body 13 stops at the center of the block 7, the reciprocating air motor 100 has a structure in which it cannot operate.

Therefore, in order to solve the above problems, the present invention discloses a structure capable of driving the reciprocating air motor 100 by forcibly moving the piston valve 4 and the piston valve body (13).

The present invention includes a push shaft (14) connected to both side portions of the piston valve body (13) to move the piston valve (4) manually; A push button 18 engaged with the push shaft 14 and penetrating the housing plug 16; It is composed of a spring 17 for returning the push button 18 to the original, it is possible to manually move the piston valve 4 and the piston valve body 13 to drive the reciprocating air motor 100.

With the above configuration, the present invention is capable of the initial drive of the reciprocating air motor 100, even if the reciprocating air motor 100 is stopped due to the cooling problem, it can be temporarily operated to remove the paint remaining in the high-pressure pump This has the advantage of minimizing damage to the equipment.

Referring to Figures 2 to 10, the preferred operating state of the configuration of the present invention will be described.

Compressed air supplied through the pneumatic compressor is supplied through the air inlet 60 located on one side of the piston valve housing (9).

The supplied compressed air is introduced into the cylinder through the lower air pipe passage 66 through a conduit formed of the piston valve housing 9 and the piston valve body 13.

The introduced air moves the piston 33 upward.

In the upward movement of the piston 33, the air in the upper portion of the piston is discharged through the outlet 63 through the upper air line 65 through the pipe line changed to the piston valve 4.

When the piston 33 moves upward, in contact with the valve stem 27 of the pilot valve 20, and continuously moved upward, one side of the valve stem 27 closes the residual air discharge pipe S and At the same time, the poppet 26 coupled with the valve stem 27 is moved to open the suction pipe I.

When the poppet 26 of the pilot valve 20 opens the suction pipe, the compressed air flowing into the suction pipe supplies compressed air into the piston valve housing 9 through the valve housing 29 and the discharge pipe E. .

The compressed air supplied to the piston valve housing 9 compresses the piston valve body 13, and when the force of the compressed air exceeds the engaging jaw of the spring 5 and the block 7, the piston valve body 13. And piston valve 4 move down.

Compressed air supplied to the cylinder by the movement of the piston valve body 13 and the piston valve 4 is supplied through the upper air pipe (65), thereby causing the piston to move downward.

When the piston moves downward, the pilot valve 20 is returned to its original state by the spring 24 of the pilot valve 20.

When the pilot valve 20 is returned to its original state, the compressed air remaining in the discharge pipe E and the piston valve housing 9 is discharged to the outside through the residual air discharge pipe S.

The biggest feature of the present invention is to discharge while passing around the intake pipe (I), exhaust pipe (E) and the upper and lower air passages (65, 66) without directly discharging the residual air discharge pipe (S) to the outside, It is characterized by delaying time.

According to the present invention, the piston 33 may be expanded to a reciprocating air motor using one or more multistage pistons, and the shape of the ventilation holes 61 may be variously changed, and the heat dissipation fin or the grating may be added to the ventilation holes 61. It is also to be considered as included within the scope of the present invention.

1: cylinder, 2: gasket, 3: valve plate, 4: piston valve, 5: spring, 6: roller, 7: block, 9: piston valve housing, 12: U-packing, 13: piston valve body, 14 : Push shaft, 15: O-ring, 16: Housing plug, 17: Spring, 18: Push button, 20: Pile valve, 22: Valve cap, 24: Spring, 25: Valve seat, 26: Poppet, 27: Valve stem , 29: valve housing, 31: piston upper pad, 32: compression ring, 33: piston, 35: piston shaft, 38: piston lower pad, 39: U-packing, 40: gasket, 41: base, 42: washer, 44: Bolt, 47: Snap ring, 51: Hook, 60: Air inlet, 61: Vent. 62: slope, 63: outlet, 65: upper air passage, 66: lower air passage, 80: moving means, 81: high pressure pump, 82: paint inlet pipe, 83: spray gun, 85: hose, 100: reciprocating air motor .
I: intake pipe, E: exhaust pipe, S: residual air discharge pipe.

Claims (6)

A piston 33 for vertically reciprocating movement with compressed air, a piston shaft 35 coupled to the piston 33 to drive a high pressure pump 81, and a cylinder for guiding the vertical movement of the piston 33 ( 1), a base 41 which is fastened to the lower part of the cylinder 1 to form a high compression ratio together with the cylinder 1, and a piston valve 4 and the piston valve body 13 which are fastened to one side of the cylinder 1; Piston valve housing (9) for guiding the up and down movement of the piston, piston valve (4) for changing the upper air line (65) and lower air line (66) to the cylinder (1), and the piston (33) of A pilot valve 20 for changing the upper air line 65 and the lower air line 66 by moving the piston valve 4 and the piston valve body 13 to switch the up and down motion, and the cylinder ( In the reciprocating air motor including a hook 51 at the upper end of 1),
A valve plate 3, a piston valve 4 for changing an air discharge line to the valve plate 3, and a piston connected to the piston valve 4 and reciprocating up and down by a pilot valve 20 A valve body 13, a roller 6 which is fastened to one side of the piston valve body 13 and facilitates movement, is fixed to one side of the piston valve 4, and has a constant pressure on the roller 6 A spring 5 to be provided, a block 7 serving as a locking jaw in the shanghai-dong of the piston valve body 13, and a groove formed in both side portions of the piston valve body 13 are inserted into the airtight seal U. A piston which guides the packing 12 and the shangdong of the piston valve body 13 and has an air inlet 60 at one side thereof and is fastened together with the piston housing gasket 2 at one side of the cylinder 1. A valve housing 9;
The valve housing 29 which forms a plurality of holes in the side surface portion in the form of a hollow pipe, the valve stem 27 penetrating the inside of the valve housing 29 and acts as a valve, and one of the valve stem 27 A valve seat 25 in contact with the side portion, a spring 24 connected between the valve seat 25 and the valve stem 27, and the valve stem 27 are engaged to open and close the intake pipe I. And a three-way valve type pilot valve including a poppet 26 and inserted into a groove formed at one side of the upper end of the cylinder 1 and the base 41 to move the piston valve body 13 up and down. 20);
A valve cap 22 in contact with one side of the pilot valve 20 and fixed thereto;
Reciprocating air motor characterized in that it is provided with a snap ring 47 is fastened to the other side of the pilot valve 20 to fix the pilot valve (20).
The method of claim 1,
In the air line to be opened and closed by the pilot valve 20 is inserted into the groove formed in the one side surface of the upper end of the cylinder 1 and the base 41,
An intake pipe I for supplying compressed air;
When opened by the pilot valve 20, the exhaust pipe for discharging the compressed air supplied to the intake pipe I and supplying the compressed air to the piston valve housing 9 to move the piston valve body 13 ( E);
Reciprocating air motor comprising a residual air discharge pipe (S) for discharging the air remaining in the exhaust pipe (E) to the outside when the pilot valve (20) is closed.
3. The method according to any one of claims 1 to 2,
The residual air discharge pipe S formed in the cylinder 1 and the base 41 is not immediately discharged, but is discharged while passing around the intake pipe I, the exhaust pipe E, and upper and lower air pipes 65 and 66. Reciprocating air motor, characterized in that to delay the cooling time.
The method of claim 1,
A push shaft 14 connected to both side portions of the piston valve body 13 so as to manually move the piston valve 4;
A push button 18 engaged with the push shaft 14 and penetrating the housing plug 16;
Reciprocating air motor, characterized in that consisting of a spring (17) for returning the push button (18).
The method of claim 1,
When the reciprocating air motor is used for a long time, the upper end of the piston 33 and the base 41 has an umbrella shape with a low edge around the piston shaft 35 in order to discharge water and ice generated by throttling loss. Reciprocating air motor.
The method of claim 1, wherein
In the cylinder (1), in order to prevent cold air around the upper air line (65) and the lower air line (66) formed, the upper air line (65) and the lower air line (66) formed in one side of the cylinder vents Reciprocating air motor further comprises a 61 and the inclined portion (62).

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