JPH0736165Y2 - High pressure cylinder piston type cleaning tank device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a high pressure cylinder piston type cleaning tank device.

[Prior art]

Generally, in a vertical high-pressure cylinder, the proximity switch can be installed directly on the outer circumference of the cylinder to detect the piston position, but if the cylinder is thick, it is impossible to attach the proximity switch. The only way is to detect with a limit switch by the action of a pilot valve attached to the cylinder lid and cylinder bottom. For example, referring to a cleaning device as shown in the longitudinal sectional view of FIG. 3, 01 is a piston, 02 is a vertically extending piston rod, 012 and 013 are U packings, 014 and 015 are wear rings, and 016 is an O ring. 016 cooperates to keep the high pressure chamber airtight. 018a and 018b are liquid or gas high-pressure working fluid supply / discharge ports, 019 is a cylinder, 020 is a cylinder lid, 021 is a guide frame, 022 is a nut for fastening a piston and a piston rod, 023 is a bolt for fastening a cylinder and a guide frame, 024a , 024b are limit switches, and 025a, 025b are pilot valves. 0100 is a lower tank, 0101 is a basket suspended by a piston rod, 0102 is a cleaning solution such as nitric acid for cleaning stored in the lower tank, 0103 is a piston rod and basket hanging bolt, and 0104 is a lower tank tightening bolt. . Explaining the pilot valve, 026 is U packing, 0
27 is a wear ring, 028 is an O-ring, 029 is a mandrel, 030 is a pilot valve body, 031 is a lid, 032 is a spring, 026
~ 028 cooperate to keep the cylinder chamber and pilot valve airtight. In this structure, first, when the piston is lowered, when the high-pressure working fluid is supplied from the supply / discharge port 018a, the piston 01 and the piston rod 02 are integrally lowered, and when the piston strokes to the bottom dead center, Pilot valve 25
The bottom surface of the piston contacts the mandrel 029 of b, and the mandrel 029
The lower limit switch 024b is actuated, the supply of the working fluid from the pressure unit (not shown) to the supply / discharge port 018a is stopped, and the stroke of the piston 01 is stopped at the bottom dead center. At that time, as the piston rod 02 descends, the basket 0101 descends into the lower tank 0100, is immersed in the cleaning liquid tank 0102, and the object to be cleaned in the basket is cleaned. Next, when the piston rises, after washing time, working fluid supply and discharge port 018b is supplied, this time the piston 01 rises, by reaching the top dead center the upper pilot valve 025 a of the mandrel 029, the upper limit switch 024a operates, the supply of the working fluid stops, and the piston 01 stops at the top dead center. At that time, the basket 0101 in the lower tank 0100 rises as the piston rises. However, in such a cylinder device, the movement of the piston can be detected and stopped through the pilot valve only at the top dead center and the bottom dead center, and the intermediate stroke point cannot be detected and stopped. In an extremely low pressure thin-walled cylinder, it may be possible to detect the movement of the piston in the cylinder with a proximity switch attached to the outside of the cylinder, but this is not possible with a high-pressure thick cylinder wall.

[Problems to be solved by the device]

As described above, in the high-pressure cylinder having a structure in which the piston rod is not exposed to the outside, the top dead center and the bottom dead center of the stroke are detected through the pilot valve, but cannot be detected at an intermediate stroke position. Further, the mounting portion of the pilot valve needs to be airtight enough to withstand high pressure, and there is a possibility that the limit switch does not operate and the supply pressure does not stop depending on malfunction or inability of the pilot valve. Further, in such a structure, since the basket is structured so as to be lifted up and down by being suspended by a pithron rod that moves up and down in the fixed cylinder, naturally the cylinder working pressure liquid is discharged from the penetrating portion of the piston rod due to deterioration of the sealing material and the like. There is a risk of leakage and entry into the lower cleaning tank, which in turn causes deterioration of the cleaning liquid and may reduce the cleaning effect. The present invention has been proposed in view of such circumstances, and it is possible to detect and stop the piston stroke at a plurality of positions in the middle of the stroke, and the high-pressure working fluid of the piston can enter the cleaning tank liquid. It is an object of the present invention to provide a high-performance high-pressure cylinder-piston type cleaning tank device capable of preventing the above.

[Means for Solving the Problems]

Therefore, according to the present invention, the upper end is coaxially opened under the vertical high-pressure cylinder piston device, and a vertical cleaning tank filled with a cleaning liquid is provided inside the basket for accommodating an object to be cleaned. The cylinder piston device is suspended from the lower end of the movable cylinder of the cylinder piston device, and the basket is immersed in the cleaning liquid in the cleaning tank, and then the cylinder piston device is pulled up above the cleaning tank. A vertically fixed center rod in which a piston is projectingly provided at the lower end of a vertically fixed rod coaxially fixed to and vertically installed on the upper end of a vertically fixed cylindrical bracket having a relatively large diameter, and the fixed center rod. A pair of fluid supply / drain passages that are provided in parallel with each other in the axial direction and whose lower ends are respectively opened to the upper surface and the lower surface of the piston, and the fixed cell. Lower end closed type movable cylinder that is coaxially and fluid-tightly fitted to the ter rod and coaxially inserted to the fixed cylindrical bracket and that is vertically moved up and down by supplying and discharging the fluid through the fluid supply / discharge channel. When,
A high-pressure cylinder piston device comprising a plurality of position sensors attached to the upper and lower ends of the fixed cylindrical bracket and in the middle thereof to detect the position of the movable cylinder and stop its stroke.

[Action]

With such a configuration, as shown in FIGS. 1 and 2, the supply / discharge ports 18a, 1a of the fluid supply / discharge passage of the fixed center rod 3 are provided.
When a high-pressure working fluid is supplied to one side of 8b, the movable piston rod 2 serves as a movable cylinder and a fixed center rod.
Since it moves downward with respect to 3 , the lower cylinder outer surface of the movable cylinder, that is, the movable piston rod 2 is exposed to the atmosphere regardless of the pressure of the working fluid. Therefore, the proximity switch is attached to the bracket 6 which is the fixed cylindrical portion.
By installing 12a, 12b, and 12c, the stroke of the movable cylinder at top dead center, bottom dead center, and intermediate point can be detected at multiple places with direct proximity switches. Further, since the detection can be performed without passing through a medium such as a pilot valve, it becomes possible to have a structure that does not need to consider the airtightness of the detection device. Further, it is possible to prevent the high-pressure working fluid for driving the movable piston rod 2 from leaking into the cleaning liquid into the cleaning tank.

【Example】

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional view showing an upper portion thereof, and FIG. 2 is a vertical sectional view showing a lower portion thereof. In the above figure, the same reference numerals as in FIG. 3 indicate the same member materials as in FIG. 3, respectively. First, in FIG. 1, 1 is a piston, 2 is a tube type piston rod, 3 is a center rod, and 4 is a piston. Between the piston rod and the piston rod to form a high-pressure chamber, 5 is a bolt that fixes the piston, the gland and the piston rod, 6 is a cylindrical bracket that loosely and coaxially surrounds the piston rod 2, and 7 is the upper end of the bracket 6. A flange-shaped rod support that is concentrically fixed to a flange that is protruded from the center of the bracket, 8 is a nut that fixes the center rod and the rod support, 9 is a bolt that fastens the rod support to the upper flange of the bracket 6, and 10 is a bracket 6 A tubular guide frame coaxially inserted between the lower end flange and the flange of the lower tank 100 described later,
11 is a bolt for tightening the bracket and the guide frame, 1
Reference numerals 2 and 13 are U packings, 14 and 15 are wear rings, 16 is an O-ring, and 12 to 16 work together to keep the high pressure chamber airtight. Proximity switches 17a, 17b, and 17c are provided at the upper end, the lower end, and the center of the bracket 6, respectively, and actuated by the approach of the piston 1 with the stroke of the piston rod 2, and 18a and 18b are opened at the upper end of the center rod 3, respectively. It is a supply / discharge port for the pressurized fluid. Next, in FIG. 2, 100 is a lower tank (cleaning tank), 101 is a basket suspended by a piston rod, 102 is a cleaning solution filled in the lower tank, for example, nitric acid, and 103 is a suspension bolt for the piston rod and the basket. , 104 are lower tank tightening bolts. In such a structure, first, when the liquid or gas as the working pressure is supplied to the supply / discharge port 18a of the center rod 3 when the piston descends, the supply pressure is applied to the lower end surface of the central hole of the tube-type piston rod 2. actuated, the piston 1 and the tubular piston rod 2 is lowered as a guide to integrally center rod 3 and the piston 1 reaches the proximity switch 17 b, the switch is turned on and the pressure from the pressure unit (not shown) supplying and discharging The supply to the mouth 18a is stopped, and the stroke of the piston 1 stops at the bottom dead center. At that time, as shown in FIG. 2, the basket 101 in the cleaning tank 100 descends along with the movement of the tube type piston rod 2 and is immersed in the cleaning liquid 102, and the cleaning object in the basket 101 is cleaned. Next, when the piston rises, after the washing time elapses, the supply / discharge port 18b
When the operating pressure is supplied to the tube type piston rod 2
Supply pressure enters the pressure chamber formed by the inner wall of the center rod and the outer peripheral portion of the center rod 3, acts on the lower surface of the gland 4, and the piston 1 and the tube-type piston rod 2 integrally rise with the center rod 3 as a guide. Then, when reaching the top dead center, the proximity switch 17a operates, the supply pressure stops, and the stroke stops. At that time, the basket 101 in the cleaning tank 100 shown in FIG. 2 rises at the same time, and the basket 101 stops at the top dead center. Note that by the mounting position of the proximity switch 17 c is set to a desired position, it is possible to adjust the stroke,
For example, the stroke can be set to a desired value when the height of the cleaning liquid 102 is adjusted. In addition, in FIG. 2, a working port 105 that opens downward can be provided at the top of the cleaning tank 100. Here, the work port 105 conveys and fills the object to be cleaned, which is a powder, into the basket by an air flow by a not shown filling pump. What is washed and dissolved is
A vacuum pump sucks through the work port 105 and is discharged. According to the structure of this embodiment, the cylindrical piston rod 2 having a closed lower end has its upper end opening inserted upward from the lower end of the fixed center rod 3.
The fixed center rod 3 is externally inserted, and the fixed center rod 3 is sealed by a U packing 13 or the like provided around the upper inner surface of the cylindrical piston rod 2, and the upper end of the cylindrical piston rod 2 is integrated with this. Fixed center rod 3 through the packing by the piston 1
Since it is sealed against, the leakage of operating pressure liquid due to deterioration of the sealing material, etc. is prevented.
There is no intrusion.

[Effect of device]

With such a structure, the stroke position can be detected regardless of the pressure of the working fluid, and it is not necessary to consider the problem of fluid tightness regardless of the portion forming the high pressure portion. In addition, the position of the stroke can be surely detected at a desired position easily without stopping through a medium such as a pilot valve, and the stroke can be stopped. In short, according to the present invention, the upper end is coaxially opened under the vertical high-pressure cylinder piston device, and a vertical cleaning tank filled with a cleaning liquid is provided therein, and a basket for containing an object to be cleaned therein is provided. Is suspended at the lower end of the movable cylinder of the cylinder piston device, the basket is immersed in the cleaning liquid in the cleaning tank, and then the cleaning tank device is pulled up above the cleaning tank. A vertically fixed center rod, in which a piston is projectingly provided at the lower end of a vertically fixed vertical fixed rod that is coaxially fixed to the center of the upper end of a vertically fixed cylindrical bracket with a relatively large diameter. A pair of fluid supply / discharge channels that are provided parallel to the axial direction along the rod and whose lower ends are opened to the upper surface and the lower surface of the piston, respectively, and the fixed portion. Lower end closed type movable up and down in the axial direction by being externally coaxially and fluid-tightly inserted to the center rod and coaxially inserted to the fixed cylindrical bracket and supplying and discharging the fluid through the fluid supply / discharge channel. A cylinder and the fixed cylindrical bracket are attached to the upper and lower ends and in the middle thereof to detect the position of the movable cylinder,
By using a high-pressure cylinder piston device with multiple position sensors that stop the stroke,
The piston stroke can be detected and stopped at multiple desired stroke positions, and even if the working fluid leaks due to deterioration of the seal material, etc., it prevents high pressure from entering the cleaning tank. The present invention is extremely useful industrially because a cylinder piston type cleaning tank device is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an upper half portion of an embodiment of the present invention, and FIG. 2 is a vertical sectional view showing a lower half portion thereof. FIG. 3 is an overall longitudinal sectional view showing a known cleaning device, and FIG. 4 is a longitudinal sectional view showing the pilot valve of FIG. 1 …… Piston, 2 …… Piston rod, 3 …… Center rod, 4 …… Gland, 5 …… Bolt, 6 …… Bracket, 7…
… Rod support, 8 …… Nut, 9 …… Bolt, 10 …… Guide frame, 11 …… Bolt, 12,13 …… U packing, 14,1
5 …… Wear ring, 16 …… O ring, 17a, 17b, 17c …… Proximity switch, 18a, 18b …… Supply / discharge port, 100 …… Lower tank (wash tank), 101 …… Basket, 102 …… Cleaning liquid , 103 …… Suspension bolt, 104 …… Lower tank tightening bolt, 105 …… Work port

Claims (1)

[Scope of utility model registration request] 1. A vertical type cleaning tank filled with a cleaning liquid is provided inside the vertical type high pressure cylinder piston device so that its upper end is coaxially opened, and a basket for containing an object to be cleaned is provided inside. The cylinder piston device is suspended at the lower end of the movable cylinder, the basket is immersed in the cleaning liquid in the cleaning tank, and then the basket is lifted above the cleaning tank. A vertically fixed center rod having a piston protruding from the lower end of a vertically fixed rod that is coaxially fixed to the center of the upper end of a vertically fixed cylindrical bracket having a relatively large diameter, and the fixed center rod. A pair of fluid supply / discharge channels that are provided in parallel with each other in the axial direction and whose lower ends are opened to the upper surface and the lower surface of the piston, respectively, and the fixed center rod. Lower end closed type movable cylinder which is coaxially and fluid-tightly inserted into the fixed cylinder bracket and coaxially inserted into the fixed cylindrical bracket and is axially moved up and down by supplying and discharging the fluid through the fluid supply / discharge channel. And a plurality of position sensors attached to the upper and lower ends of the fixed cylindrical bracket and the middle thereof to detect the position of the movable cylinder and stop the stroke of the high pressure cylinder piston device. High pressure cylinder piston type cleaning tank device.