KR100916918B1 - Hydraulic paint sprayer cylinder - Google Patents

Abstract

The present invention relates to a hydraulic coating equipment for use in ship coating. More specifically, in the present invention, since the diameter of the valve rod is large, no deformation occurs during operation or repair of the hydraulic sprayer, and since the spool rotates independently of the valve rod, the spool pitting phenomenon does not occur, and the piston nut and the valve Due to the small tolerance with the rod, the vertical balance of the valve rod is well maintained, the height of the retainer bolt is matched to the tool bite, reducing the tension of the spring in the lower part of the valve rod and allowing the valve rod to be easily separated from the valve rod. It relates to a hydraulic spray cylinder that not only wears easily or breaks down, but also facilitates overall maintenance and repair.

Marine Seal, Hydraulic Sprayer

Description

Hydraulic paint sprayer cylinder

The present invention relates to a hydraulic coating equipment for use in ship coating.

Hydraulic coating equipment (see FIG. 1) is excellent in workability compared to the existing pneumatic coating equipment, in recent years, the use of hydraulic coating equipment for ship painting is increasing.

However, due to the high pressure, high temperature, and wear of some parts inside the upper hydraulic cylinder during operation of the hydraulic sprayer, equipment failures are frequent, requiring considerable time and expense to repair them, significantly reducing equipment uptime and reliability in terms of quality. There is a falling problem.

In other words, the diameter of the valve rod connecting the spool and the piston inside the cylinder is small, so it is easy to cause deformation during operation or repair of the hydraulic sprayer. Jamming occurs frequently, in which case the paint hardens and adversely affects the pump under the cylinder (see FIGS. 3, 4 and 6).
In addition, the spool and the valve rod is to be returned to the integrated type, so that the rotation of the spool is not smooth and, in severe cases, the spool digging phenomenon may occur (see FIG. 8).
In addition, when the retainer bolt (Fig. 2 (1)) is loosened or removed, the tool bite is difficult to work (see Figs. 5 and 7), and the tension of the spring under the valve rod is too large, There is a problem that the welding is integral, so it is quite difficult to later remove the valve rod from the hydraulic sprayer cylinder (see Figure 9).

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The present invention has been proposed to solve the above problems, the diameter of the valve rod is large, the deformation does not occur during the operation or repair of the hydraulic sprayer, the spool roam phenomenon occurs because the spool rotates independently of the valve rod The small tolerance between the piston nut and the valve rod ensures that the vertical balance of the valve rod is well maintained, the height of the retainer bolt is matched to the tool bite, reducing the tension of the spring in the lower part of the valve rod and easily separating it from the valve rod. By making it possible, it is an object to provide a hydraulic spray cylinder that not only wears or breaks internal parts easily but also facilitates overall maintenance and repair.

Other objects and advantages of the present invention will be described below, which are not limited to the matters set forth in the claims and the disclosure of the embodiments thereof, but also to the broader ranges by means and combinations within the range readily recited therefrom. Add that it will be included.

In order to achieve the above object, the present invention is located in the lower portion of the body of the hydraulic sealer cylinder, by supplying the hydraulic oil into the hydraulic sealer cylinder, the hydraulic sealer cylinder according to the hydraulic pressure acting upward in the piston 25 A lower block 35 to rise therein; Located in the upper part of the body of the hydraulic sealer cylinder, the piston 25 rises inside the hydraulic sealer cylinder and discharges the hydraulic oil pushed up to the upper space of the hydraulic sealer cylinder to the outside, while the piston 25 is at the highest point. The upper block (3) to reach the hydraulic sealer cylinder by supplying hydraulic oil back into the hydraulic sealer cylinder when reaching the piston 25 in accordance with the hydraulic pressure acting downward; While rotating inside the body of the hydraulic sealer cylinder, it moves in the up and down direction in connection with the up and down reciprocating motion of the piston 25. When the piston 25 is raised to push up the spool 11, the lower part of the body of the spool 11 and The hydraulic oil existing in the space between the pistons 25 is discharged to the outside of the upper block 3 through a plurality of grooves present around the body, while the discharge flow path of the hydraulic oil is opened at the moment when the piston 25 reaches the highest point. A spool 11 for blocking and pushing the piston 25 to descend by using the pressure of the hydraulic oil flowing into the upper block 3; A rod-shaped member having a circular cross section, the upper end of the body is fitted to the spool 11 and the lower end of the body is connected to the piston rod through the piston 25 so that the spool 11 is the upper part of the piston 25. A valve rod (29), which serves as a support for rotating in space or moving in a vertical direction, wherein a stage for allowing the spool (11) to rotate alone is formed at an upper end of the body; In the center of the body there is a groove through which the valve rod 29 can penetrate, and a screw thread exists around the lower part of the body. The valve rod 29 passes through the valve rod 29 in a screwed state with the piston 25. The rod 29 is fastened to the piston 25 and supported so that the valve rod 29 can be maintained vertically inside the body of the hydraulic sealer cylinder, while the piston is provided through a groove portion through which the valve rod 29 passes. A piston nut 24 for discharging the residual amount of hydraulic oil in the rod into the upper space of the piston 25; It is inserted into the lower part of the body of the valve rod 29 connected to the piston rod through the piston 25 to elastically support the piston 25 to the piston 25 during the up and down reciprocating movement of the piston 25. A spring 30 that serves to recoil; And a retainer bolt 1 serving as a cover of the cylinder head.

In the hydraulic spray cylinder according to the present invention, since the diameter of the valve rod is large, no deformation occurs during the operation or repair of the hydraulic sprayer, and since the spool rotates independently of the valve rod, the spool pitting phenomenon does not occur, and the piston nut The vertical tolerance of the valve rod is well maintained due to the small tolerance between the valve rod and the head rod, and the height of the head bolt coincides with the bite of the tool, which makes it easy to loosen or tighten the head bolt. Since it is easily separated from the valve rod, the parts inside the hydraulic sprayer cylinder are not easily worn or broken, and the whole maintenance and repair work can be easily performed.

Other effects of the present invention, as well as those described in the above-described embodiments and claims of the present invention, as well as potential effects that may occur within the range that can be easily estimated therefrom and potential advantages that contribute to industrial development It will be added that it will be covered by a wider scope.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

FIG. 22 shows the outer shape of the hydraulic sprayer cylinder according to the present invention, and FIG. 18 shows the inner shape cut off the cylinder in FIG. And Figure 23 is to further cut the surface of Figure 18 shows the shape and structure of the interior and exterior of the hydraulic sprayer cylinder according to the present invention at a glance.

The lower block 35 (see FIG. 23) is located under the body of the hydraulic sealer cylinder. The lower block 35 serves to cause the piston 25 to rise in the hydraulic sealer cylinder according to the hydraulic pressure acting upward by supplying hydraulic oil into the hydraulic sealer cylinder. At this time, the inflow of the hydraulic oil to the lower block 35 is made through "A" (see Figure 22, Figure 23).

The upper block 3 (see FIG. 23) is located above the body of the hydraulic sealer cylinder. The upper block 3 discharges the hydraulic oil pushed up into the upper space of the hydraulic sealer cylinder while the piston 25 rises inside the hydraulic sealer cylinder to the outside, while the piston 25 reaches the highest point. By supplying the hydraulic oil into the long-term cylinder serves to lower the piston 25 in the hydraulic sealer cylinder in accordance with the hydraulic pressure acting in the downward direction. At this time, the discharge of the hydraulic oil from the upper block 3 is made through "B" (see Fig. 22, 23), the inflow of the hydraulic oil into the upper block 3 is made through "C" (Fig. 22).

Spool 11 (see FIG. 23) generally refers to a skewered spindle that opens and closes a flow path of a fluid while axially moving a cylindrical sliding surface, the operation principle of which is known in the art. Detailed description will be omitted. The spool 11 moves in the up and down direction in conjunction with the up and down reciprocating motion of the piston 25 while rotating inside the body of the hydraulic sealer cylinder (see arrows in FIG. 23). The spool 11 has a plurality of grooves present around the body of hydraulic oil existing in the space between the lower body of the spool 11 and the piston 25 when the piston 25 is raised to push up the spool 11. While discharging to the outside of the upper block (3) through, while the piston 25 reaches the highest point, the piston 25 is blocked by using the pressure of the hydraulic oil flowing into the upper block (3) to block the discharge flow path of the hydraulic oil. It acts to push down.

The valve rod 29 (see FIG. 23) is a rod-shaped member having a circular cross section. The upper end of the body of the valve rod 29 is fitted into the spool 11 and the lower end of the body is connected to the piston rod through the piston 25 so that the spool 11 rotates in the upper space of the piston 25 or It acts as an axial support in moving up and down.
At this time, the upper end of the body of the valve rod 29 is formed with a stage to allow the spool 11 to rotate alone (see Fig. 16). In this case, since the spool 11 is not integral with the valve rod 29 and rotates independently of the valve rod 29, the spool 11 can be smoothly rotated without being constrained by the valve rod 29. 11) No digging phenomenon appears (see FIG. 15).
On the other hand, the valve rod 29 is preferably to increase the diameter of the rod so as not to bend even when the spool 11 rotates or moves in the vertical direction. In the embodiment according to the invention the diameter of the valve rod 29 has been increased from 12 mm to 16 mm, as a result, the valve rod 29 is no longer deformed during the operation or repair of the hydraulic sprayer (Fig. 3, see FIG. 10).

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The piston nut 24 (see FIG. 23) is a nut having a groove through which the valve rod 29 penetrates in the center of the body and a thread around the bottom of the body. The piston nut 24 is connected to the piston 25 by the valve rod 29 to pass through the valve rod 29 in a screwed state with the piston 25 through which the valve rod 29 is a hydraulic seal cylinder It is supported to maintain the vertical inside the body of the (see Figs. 18, 19, 20, 23).
In this case, the piston nut 24 is preferably such that the diameter of the groove existing in the center of the body is larger than the diameter of the valve rod 29, the difference is maintained to 0.5 mm. If the diameter of the groove in the center of the piston nut 24 is larger than the diameter of the valve rod 29 by 0.5 mm or more, the spool 11 may be caught due to the poor vertical balance of the valve rod 29. do. In the embodiment according to the present invention, the diameter of the valve rod 29 is 16 mm and the diameter of the groove in the center of the body of the piston nut 24 is 16.5 mm. As a result, the vertical balance of the valve rod 29 is It was well maintained (see Figure 14).
On the other hand, the piston nut 24 serves to discharge the hydraulic oil remaining amount of the piston rod to the upper space of the piston 25 through the groove portion through which the valve rod 29 passes. In this case, the piston nut 24 is preferably provided with a plurality of key grooves around the groove in the center of the body so that the hydraulic oil can flow smoothly through the groove even when the valve rod 29 penetrates. . At this time, four key grooves are formed in the grooves of the piston nut 24 at regular intervals of 90 degrees to achieve an overall balance (see FIG. 13).
In the above case, the body outer surface of the valve rod 29 is also provided with a plurality of key grooves in the longitudinal direction so that the valve rod 29 exists in the center of the body of the piston nut 24 even though the valve rod 29 has penetrated the piston nut 24. It is preferable to allow the hydraulic oil to flow smoothly through the groove portion. At this time, it is also possible to achieve the overall balance that four key grooves are also formed at a constant interval of 90 degrees on the outer surface of the body of the valve rod 29 (see FIG. 14).

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The spring 30 (see FIG. 23) is inserted into the lower part of the body of the valve rod 29 connected to the piston rod through the piston 25 to elastically support the piston 25, thereby up and down the piston 25. It serves to give a backlash to the piston 25 when the reciprocating motion is switched.
The spring 30 is not welded integrally with the valve rod 29 but has an independent structure that can be inserted into or taken out of the valve rod 29, and is preferably separated into two upper and lower stages. (See FIG. 17, FIG. 23). When the spring 30 is separated in two stages as described above, the tension of the spring 30 decreases and the spring 30 is easily separated from the valve rod 29. Even when disconnected from the spring 30, it no longer acts as an obstruction.

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The retainer bolt 1 (see Fig. 22) serves as a cover for the cylinder head, and it is preferable that the height of the bolt head portion is of sufficient length so as to be able to engage with the tool (see Figs. 11, 12 and 22). . In this case, when the retainer bolt 1 is loosened or removed, the tool bite portion is high and the operation can be easily performed.

Hereinafter, a process of hydraulic pressure flowing in the hydraulic spray cylinder according to the present invention. At this time, ①, ②, ③ are related to the up stroke of the piston 25, ④ is related to the down stroke of the piston 25.

① Hydraulic oil (hydraulic) flows into the lower block 35 through “A” (see FIGS. 21 and 23). → ② Hydraulic oil slowly pushes up the piston (25). ¡Æ when the piston 25 is pushed up and the spool 11 is pushed up, the spool 11 opens the flow path of the hydraulic oil, and the hydraulic oil is discharged to the outside of the upper block 3 through the groove around the spool 11. . The discharge of the hydraulic oil from the upper block 3 takes place via "B" (see Figs. 19 and 23). → ④ When the piston 25 reaches the highest point, the spool 11 shuts off the flow path of the hydraulic oil. At this time, the discharge of the hydraulic oil through the “B” is stopped. At the same time, the spool 11 collects hydraulic oil flowing into the upper block 3 through “C” (see FIG. 22) and increases pressure to push the piston 25 downward. In this process, the spool 11 automatically descends. → Repeat from ⑤ ①.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but to describe the present invention, and the scope of the technical idea of the present invention is limited by the embodiments and the accompanying drawings. no. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Figure 1 shows the overall appearance of the hydraulic sprayer.

FIG. 2 shows a state in which the hydraulic sprayer cylinders shown in FIG. 1 (circular parts) are disassembled and arranged according to their parts.

3 shows a conventional valve diameter small in diameter.

Fig. 4 shows a piston nut having a conventional large diameter groove.

FIG. 5 shows a retainer bolt having a significantly lower height than a tool in the prior art.

Fig. 6 shows a state in which the vertical balance of the valve rod is poor because the tolerance between the groove of the conventional piston nut and the diameter of the valve rod is very large.

7 shows a state in which the height of the head portion of the conventional retainer bolt is considerably lower than that of the tool, and the retainer bolt is worn out in the process of loosening and tightening the retainer bolt.
8 shows a state in which the spool digging phenomenon is shown as a result of the rotation of the spool and the valve rod is integrated as a conventional one is not smooth.

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FIG. 9 illustrates a state in which a spring below the conventional valve rod is integrally welded with the valve rod.

Figure 10 shows a large diameter valve rod according to the present invention.

Figures 11 and 12 show retainer bolts in which the height of the head portion according to the invention is raised to fit the tool.

FIG. 13 illustrates a state in which four key grooves are formed at regular intervals of 90 degrees around a groove existing at the center of the body of the piston nut according to the present invention.

Figure 14 is a state in which the vertical balance of the valve rod is well maintained while a plurality of key grooves are provided in the longitudinal direction of the rod on the outside of the body of the valve rod in accordance with the present invention, the tolerance between the groove of the piston nut and the diameter of the valve rod is small It is shown.

15 shows a smooth rotation of the spool according to the present invention, there is no spool digging phenomenon.
Figure 16 illustrates a state in which a stage for allowing the spool to rotate alone is formed on the upper end of the body of the valve rod according to the present invention.

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17 shows a state in which the spring according to the present invention has an independent structure which can be inserted into or pulled out of the valve rod without being welded integrally with the valve rod, and is separated into two stages above and below.

FIG. 18 shows the internal shape of the cylinder cut in FIG. 22.

19 shows an enlarged view of the upper shape of the hydraulic sprayer cylinder shown in FIG. 18.

FIG. 20 is an enlarged view of a central portion of the hydraulic spray cylinder shown in FIG. 18.

FIG. 21 is an enlarged view of a lower shape of the hydraulic spray cylinder shown in FIG. 18.
Figure 22 shows the external shape of the hydraulic sprayer cylinder according to the present invention.
FIG. 23 is a cutaway view of the surface of FIG. 18 to illustrate the shape and structure of the inside and outside of the hydraulic sprayer cylinder according to the present invention.

<Description of Major Symbols in Drawing>

1: Retainer Bolt

3: upper block

11: spool

24: piston nut

25: piston

29: valve rod

30: spring

35: lower block

Claims (7)

Located in the lower portion of the body of the hydraulic sealer cylinder, the lower block 35 for supplying hydraulic oil into the hydraulic sealer cylinder to rise in the hydraulic sealer cylinder according to the hydraulic pressure acting upwards; Located in the upper part of the body of the hydraulic sealer cylinder, the piston 25 rises inside the hydraulic sealer cylinder and discharges the hydraulic oil pushed up to the upper space of the hydraulic sealer cylinder to the outside, while the piston 25 is at the highest point. The upper block (3) to reach the hydraulic sealer cylinder by supplying hydraulic oil back into the hydraulic sealer cylinder when reaching the piston 25 in accordance with the hydraulic pressure acting downward; While rotating inside the body of the hydraulic sealer cylinder, it moves in the up and down direction in connection with the up and down reciprocating motion of the piston 25. When the piston 25 is raised to push up the spool 11, the lower part of the body of the spool 11 and The hydraulic oil existing in the space between the pistons 25 is discharged to the outside of the upper block 3 through a plurality of grooves present around the body, while the discharge flow path of the hydraulic oil is opened at the moment when the piston 25 reaches the highest point. A spool 11 for blocking and pushing the piston 25 to descend by using the pressure of the hydraulic oil flowing into the upper block 3; A rod-shaped member having a circular cross section, the upper end of the body is fitted to the spool 11 and the lower end of the body is connected to the piston rod through the piston 25 so that the spool 11 is the upper part of the piston 25. A valve rod (29), which serves as a support for rotating in space or moving in a vertical direction, wherein a stage for allowing the spool (11) to rotate alone is formed at an upper end of the body; In the center of the body there is a groove through which the valve rod 29 can penetrate, and a screw thread exists around the lower part of the body. The valve rod 29 passes through the valve rod 29 in a screwed state with the piston 25. The rod 29 is fastened to the piston 25 and supported so that the valve rod 29 can be maintained vertically inside the body of the hydraulic sealer cylinder, while the piston is provided through a groove portion through which the valve rod 29 passes. A piston nut 24 for discharging the residual amount of hydraulic oil in the rod into the upper space of the piston 25; It is inserted into the lower part of the body of the valve rod 29 connected to the piston rod through the piston 25 to elastically support the piston 25 to the piston 25 during the up and down reciprocating movement of the piston 25. A spring 30 that serves to recoil; And Retainer bolts (1) to cover the cylinder head Hydraulic sprayer cylinder comprising a. The method of claim 1, The valve rod 29, A hydraulic sprayer cylinder, characterized in that the diameter of the rod so as not to bend even when the spool (11) rotates or moves in the vertical direction. The method of claim 1, The valve rod 29, By providing a plurality of key grooves in the longitudinal direction on the outer surface of the body, even when the valve rod 29 penetrates the piston nut 24, the hydraulic oil is provided through the groove portion existing in the center of the body of the piston nut 24. Hydraulic sprayer cylinder, characterized in that to smoothly flow. The method of claim 1, The piston nut 24 is, The diameter of the groove existing in the center of the body is larger than the diameter of the valve rod (29), the hydraulic spray cylinder, characterized in that to maintain the difference 0.5 mm. The method of claim 1, The piston nut 24 is, Hydraulic sprayer cylinder, characterized in that by providing a plurality of key grooves around the groove in the center of the body so that the hydraulic oil can flow smoothly through the groove portion even when the valve rod (29) penetrates. The method of claim 1, The spring 30, Hydraulic sprayer cylinder, characterized in that it is not welded integrally with the valve rod (29), but has an independent structure that can be inserted into or taken out of the valve rod (29). The method according to claim 1 or 6, The spring 30, Hydraulic sprayer cylinder, characterized in that separated in two stages.

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