JP4585019B2 - Cylinder cover cleaning device - Google Patents

Description

  The present invention relates to a cleaning apparatus for cleaning deposits such as salt crystals attached to a rod in a protective cover of a hydraulic cylinder mainly used as a suspension shock absorber for an amphibious vehicle.

A suspension shock absorber (hereinafter referred to as a shock absorber) is always used for a tire suspension part of an amphibious vehicle. As shown in FIG. 6, the shock absorber is composed of a hydraulic cylinder, and a protective cover 102 is provided so that mud, rainwater, etc. do not adhere to the cylinder rod 101 when traveling on the road. In addition, a protective cover 102 is provided to prevent damage caused by fluid, sand, dust, and the like when seawater / freshwater enters. The protective cover 102 is made of iron, is attached to the cylinder rod 101 and moves up and down together with the cylinder rod 101, and there is a gap 104 of about 3 mm between the cylinder case 100.
When traveling on the road, the cylinder rod 101 repeatedly moves up and down in response to pushing up from the road, but mud or the like only adheres to the surface of the protective cover 102 or the cylinder case 100 and does not adhere to the cylinder rod 101.
However, during sea travel, seawater enters the space 105 between the cylinder rod 101 and the protective cover 102 through the gap 104 between the cylinder case 100 and the protective cover 102. When the marine navigation ends and returns to the land, seawater is discharged through the gap 104 of the protective cover 102, but a thin seawater film remains on the surface of the cylinder rod 101. The seawater film vaporizes the water in the film as time passes on land, and remains on the surface of the cylinder rod 101 as fine salt crystals. This crystal is similar to a paper file for the oil-tight packing 103 and causes damage early. Further, the salt crystals oxidize the protective coating (such as chromium plating) of the cylinder rod 101, and eventually the protective coating is broken and rust is generated. This rust and salt crystals synergistically damage the oil-tight packing 103.
In such an amphibious vehicle, it is obliged to wash the vehicle body with clean water after marine navigation, but since it does not enter a confined space such as the space 105, it cannot be washed by a normal method. . In addition, there was no patent document or non-patent document related to the prior art for cleaning such a cylinder device with the protective cover 102.

When cleaning the cylinder device with the protective cover 102 as described above, the cylinder device is generally removed and the components are disassembled for cleaning. However, such a method is not desirable because it takes time and labor.
Therefore, the present invention provides a short time without removing the cylinder device or disassembling any parts when cleaning and removing deposits such as salt crystals attached to the cylinder rod of the hydraulic cylinder, which is a shock absorber. In order to solve the problems such as washing with a simple cleaning device without requiring large equipment, and reducing the salt concentration after washing.

  A cylinder cover cleaning device according to the present invention is a device in which a protective cover is attached to a cylinder rod of a cylinder device, and the cylinder rod surface in the protective cover is cleaned, and grips a cylinder case of the cylinder device. Divided chambers divided into two, a plurality of nozzle tubes which are detachably attached to the respective divided chambers and inserted from the gap between the cylinder case and the protective cover, and mixing of water and cleaning liquid in the divided chambers And a mixer for supplying a liquid.

  By constructing in this way, without removing the cylinder device or disassembling any parts, it is possible to quickly wash and remove deposits such as salt crystals attached to the cylinder rod in the protective cover with a simple cleaning device. Can be removed.

In the cylinder cover cleaning device of the present invention, a nozzle tube for injecting the mixed solution in the axial direction and a nozzle tube for injecting the mixed solution in the lateral direction toward the cylinder rod are arranged in the circumferential direction of the divided chamber. They are provided alternately.
As a result, the cleaning liquid is uniformly sprayed onto the surface of the cylinder rod in the protective cover, so that it is possible to reliably perform cleaning and shorten the cleaning time.

The divided chamber is strongly held by the cylinder case when an internal pressure is applied.
As a result, the split chamber does not slide down due to the reaction force of the injection pressure from the nozzle tube, and the cylinder case is not damaged.

  In the cylinder cover cleaning apparatus of the present invention, a salt removing agent is used for the cleaning liquid. Thereby, the crystal | crystallization of the salt which adhered to the cylinder rod can be removed reliably.

In the cylinder cover cleaning apparatus according to the present invention, the mixer is connected to a tap water tap or an existing water tank.
Therefore, no special equipment is required as a pressure source for cleaning water.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an outline of a cylinder cover cleaning apparatus according to an embodiment of the present invention, FIG. 2 is a side view showing a main part of the cleaning apparatus, and FIG. 3 is a cross-sectional view of a mixer of the cleaning apparatus. FIG. 4 is a cross-sectional side view of the mixer main body of FIG. FIG. 5 is an explanatory diagram showing a use state during cleaning.

  This cleaning apparatus is divided into two divided chambers 1 that hold the cylinder case 100 of the hydraulic cylinder shown in FIG. 6, and is detachably attached to each of the divided chambers 1. A plurality of nozzle tubes 2 inserted from the gaps 104 and a mixer 3 for supplying a cleaning liquid obtained by mixing water and a salt removing agent to each divided chamber 1. A cleaning liquid container 4 containing a salt removing agent is attached to the mixer 3, and tap water is supplied through a tap water hose (not shown). Moreover, this mixer 3 and each division | segmentation chamber 1 are connected by the branch hose 11 branched in the Y shape.

  The divided chamber 1 is formed in a semicircular arc shape, and a plurality of screw holes for attaching the nozzle tube 2 with screws are provided on the upper surface. The number of screw holes is larger than the number of nozzle tubes 2, and unused screw holes are closed with pan head screws 12. The two split chambers 1 are provided with toggle latches 5 made of claws and hooks at their respective ends, and the toggle latches 5 make it easy to attach and detach the split chamber 1 to and from the cylinder case 100. Further, one end of a branch hose 11 is connected to the lower part of each divided chamber 1. Furthermore, each divided chamber 1 is formed with a thin deformable inner peripheral wall so as to be more firmly fixed to the cylinder case 100 when an internal pressure is applied. Each divided chamber 1 is made of, for example, corrosion-resistant stainless steel (SUS304).

  Since the nozzle tube 2 is inserted from the gap 104 between the cylinder case 100 and the protective cover 102, the nozzle tube 2 is a thin tube having a diameter of about 2 mm. The nozzle tube 2 is divided into a nozzle type (A) for injecting the cleaning liquid in the form of bubbles in the axial direction and a nozzle type (B) for injecting the cleaning liquid in the form of bubbles in the lateral direction toward the cylinder rod 101. By attaching each nozzle type (A) and (B) to the divided chamber 1 alternately, for example, the surface of the cylinder rod 101 can be uniformly cleaned with a foam-like cleaning liquid. In addition, each nozzle tube 2 is preferably made of metal in order to prevent bending when inserted, and is more preferably a corrosion-resistant material such as SUS304.

  As shown in FIGS. 4 and 5, the mixer 3 includes a mixer main body 30 and a cleaning liquid container 4 in which a solution of a salt removing agent (for example, “SALT TERMINATOR”) is placed. The mixer main body 30 has a first hole 31 having a larger diameter and a second hole 32 having a smaller diameter coaxially provided, and a first communication hole 33 communicating with the first hole 31 and the second hole 32, respectively. The second communication hole 34 is provided in the container mounting portion 35. Here, the inner diameter of the first hole 31 is d1, the inner diameter of the second hole 32 is d2, and the lengths of the first hole 31 and the second hole 32 from the connection line 40 of the first hole 31 and the second hole 32 are respectively set. L1, L2, and when the distance between the first communication hole 33 and the second communication hole 34 from the connection line 40 is a1 and a2, respectively, salt removal is performed by the ratio of the dimensions of these d1, d2, L1, L2, a1, and a2. The mixing ratio of the agent solution and water is determined (note that the first communication hole 33 and the second communication hole 34 have the same inner diameter). This mixing ratio is a condition for the cleaning liquid to be jetted in a foam shape when the cleaning liquid is sprayed from each nozzle tube 2.

Next, a method for using the cleaning apparatus configured as described above will be described with reference to FIGS.
First, the nozzle pipes 2 of the nozzle types (A) and (B) are alternately attached to the screw holes of the divided chambers 1 and fixed with nuts. At this time, the nozzle tube 2 of the nozzle type (B) is attached so that the injection port faces the cylinder rod 101 side. In this way, the cleaning heads are assembled, and the nozzle tube 2 is slowly inserted from the gap 104 between the cylinder case 100 and the protective cover 102. Then, the two divided chambers 1 are connected to each other by a toggle latch 5 at a predetermined location and lightly held in the cylinder case 100. Next, the mixer 3 is connected to each divided chamber 1 by a Y-shaped branch hose 11, and the mixer 3 and a tap water tap or a water tank mounted on an amphibious vehicle are connected to a tap water hose. Use to connect. In addition, since these hose connection parts are comprised with the one-touch coupler, they can be connected easily. Then, a predetermined amount (about 120 ml when full) of the salt removing agent solution is placed in the cleaning liquid container 4 and attached to the mixer body 30.
This completes the cleaning preparation work.

Next, the tap water tap or the like is twisted to start water passage. The water pressure may be 0.5 to 0.7 MPa. When the water flow is started, a part of water enters the cleaning liquid container 4 from the first hole 31 having a large diameter through the first communication hole 33 and pushes out the solution of the salt removing agent in the mixer 3. The extruded solution of the salt removing agent enters the second hole 32 having a small diameter through the second communication hole 34 and is mixed and diluted with water at a predetermined mixing ratio, and this mixed solution passes through the Y-type branch hose 11. It is pumped to each divided chamber 1. When the internal pressure is applied, each divided chamber 1 is instantly attached to the cylinder case 100 and firmly fixed and held. Therefore, the reaction force of the injection pressure from the axial injection nozzle type (A) does not cause the split chamber 1 to slide down, and the cylinder case 100 is not damaged.
The cleaning liquid is jetted in the form of bubbles from the nozzle tubes 2 of the nozzle types (A) and (B), thereby washing the surface of the cylinder rod 101 evenly. As a result, salt crystals adhering to the surface of the cylinder rod 101 can be removed. After the salt remover solution in the cleaning liquid container 4 is emptied, fresh water is passed through and rinsed. Thereafter, the cleaning device is removed, the cylinder rod 101 is dried, and lubricating oil such as grease is applied to complete the operation.

As described above, according to the present cleaning device, it is possible to reliably clean and remove the salt crystals attached to the cylinder rod without removing or disassembling the hydraulic cylinder that is a shock absorber of an amphibious vehicle. Cleaning time is about 15 minutes per unit. Further, it can be cleaned with a simple cleaning device without requiring an additional pressure source such as a pressure pump. Furthermore, it was confirmed that the salt concentration after washing was 0.01% or less by using a salt remover. If the salt concentration is 0.01% or less, the plating on the cylinder rod surface will not be corroded. In addition, when it wash | cleans only with fresh water, since the salt concentration after washing | cleaning is 0.14% and salt concentration is high, possibility of corroding a cylinder rod surface is high.
Moreover, this cleaning apparatus does not require any skill, and anyone can easily perform cleaning by reading the instruction manual.

  The present cleaning apparatus has been described with the hydraulic cylinder, which is a shock absorber of an amphibious vehicle, as an object to be cleaned, but can be applied to all cylinder apparatuses with a protective cover. Further, the deposit on the cylinder rod surface is not limited to salt crystals. An appropriate cleaning solution may be used depending on the type and properties of the deposit.

The block diagram which shows the outline | summary of the cleaning apparatus in a cylinder cover which concerns on embodiment of this invention. The side view which shows the principal part of this cleaning apparatus. The cross-sectional top view of the mixer of this cleaning apparatus. FIG. 4 is a cross-sectional side view of the mixer main body of FIG. 3. Explanatory drawing which shows the use condition at the time of washing | cleaning. 1 is a configuration diagram of a hydraulic cylinder to be cleaned.

Explanation of symbols

  1 split chamber, 2 nozzle tube, 3 mixer, 4 cleaning solution container, 5 toggle latch, 100 cylinder case, 11 branch hose, 12 pan head screw, 30 mixer body, 31 1st hole, 32 2nd hole, 33 1st 1 communication hole, 34 2nd communication hole, 35 container mounting portion, 101 cylinder rod, 102 protective cover, 103 oil-tight packing, 104 gap between cylinder case and protective cover, 105 space between cylinder rod and protective cover.

Claims (5)

A protective cover is attached to the cylinder rod of the cylinder device, and the cylinder rod surface in the protective cover is cleaned.
A split chamber divided into two to hold a cylinder case of the cylinder device; a plurality of nozzle tubes that are detachably attached to the split chambers and inserted from a gap between the cylinder case and a protective cover; A cylinder cover cleaning apparatus, comprising: a mixer for supplying a mixed liquid of water and a cleaning liquid to the division chamber.   2. A cylinder according to claim 1, wherein a nozzle pipe for injecting the mixed liquid in an axial direction and a nozzle pipe for injecting the mixed liquid in a lateral direction toward the cylinder rod are alternately provided in a circumferential direction. In-cover cleaning device.   The cylinder cover cleaning apparatus according to claim 1 or 2, wherein the divided chamber is strongly held by the cylinder case when an internal pressure is applied.   The in-cylinder cover cleaning device according to any one of claims 1 to 3, wherein a salt removing agent is used for the cleaning liquid.   The in-cylinder cover cleaning device according to any one of claims 1 to 4, wherein the mixer is connected to a tap water tap or an existing water tank.

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