KR100329727B1 - Cylinder for tensioning a wire with a constant pressure - Google Patents

Abstract

PURPOSE: A static pressure wire tension cylinder is provided to simplify components, to execute anchoring works simply and to prevent a breakdown. CONSTITUTION: The static pressure wire tension cylinder(100) comprises a cylinder installed to let a piston reciprocate and divided into a room A and a room B by a piston, a piston, an A-room port and a B-room port interposed in a room A and a room B to let a fluid flow through an outside valve, a pump and a fluid tank, a bottom plate installed to close up one side of the cylinder and provided with a perforation hole to let a steel wire(11) pass through, a sleeve fixed to the bottom plate and extended toward the other side of the cylinder, a jaw holding sleeve fixed to the piston and projected to make the other side of the cylinder reciprocated along the outside of the sleeve, a chock formed by arranging many jaws in the direction of circumference, and a chock cover installed to cover up the chock from the outside of the sleeve.

Description

CYLINDER FOR TENSIONING A WIRE WITH A CONSTANT PRESSURE}

The present invention relates to a positive tension strand tension cylinder, and more particularly, a static tension strand tension cylinder for a hydraulic tension device for earthquake construction used for anchoring so that the soil cut during underground excavation or cutting work in civil engineering or construction work It is about.

In the anchor work in the conventional earthen construction, all the anchor chokes are not uniformly inserted into the plurality of tapered choke insertion holes formed in the anchor head, so that a loss rate of 20 to 30% is generated, thereby ensuring reliable anchoring. Barrel hydraulic tension device for solving the problem that is not available bar, the hydraulic tension device for the earthwork construction, the high-pressure cylinder 21 and acupressure plate (5) for pulling in order to ensure the anchor in Figures 1 to 4 It is provided with a hydraulic tension device in between.

That is, the hydraulic tension device is a cylindrical cylinder 50, as shown in detail in Figures 1 and 2, the lower cover 53 which is screwed with the screw portion 50a formed in the lower cylinder 50, and the lower A piston 55 movably disposed between the outer peripheral surface of the cylindrical portion 53a of the cover 53 and the inner peripheral surface of the cylinder 50, and an upper portion of the cylindrical portion 53a other than the piston 55 and the lower cover 53; And screwed together with the steel wire array plate 57 for arranging the steel wire 11 and the threaded portion 50b formed in the opening of the cylinder 50 to restrict the movement of the steel wire array plate 57 by a predetermined length L. The cover 59 is provided. In addition, the hydraulic tensioning device is provided with an oil chamber 61 to move the piston 55 up and down in Figure 2, the oil chamber 61 through the nipple 63 to introduce and discharge the hydraulic pressure. The oil passage 65 communicates with the second hydraulic port 33, and is connected between the inner circumferential surface of the cylinder 50 and the outer circumferential surface of the cylindrical portion 53a of the lower cover 53 in the oil chamber 6. The first packing member 67 is provided so that the hydraulic pressure does not leak, and the hydraulic pressure in the oil chamber 61 leaks between the inner circumferential surface of the piston 55 and the outer circumferential surface of the cylindrical portion 53a of the lower cover 53. The second packing member 69 is provided so as not to be damaged.

In addition, a third packing member 70 is installed between the inner circumferential surface of the cylinder 50 and the outer circumferential surface of the piston 55 so that the hydraulic pressure in the oil chamber 61 does not leak.

3 and 4, the pulling head 25 or the anchor head 13 has the same shape, and two to twenty tapered choke insertion holes 25a and 13a are formed.

In the conventional hydraulic tensioning device, first, a through-hole not shown in the horizontal H-beam 3 is laid, and then the welding or screwing the pressure plate 5 having the through-hole 5a formed outside the through-hole. A hole 9 having a predetermined depth is formed in the soil wall 7 through the through hole 5a formed in the pressure plate 5 and the through hole formed in the horizontal H beam 3. Next, the steel wire 11 is put into the hole 9, cement mortar is put into the hole 9 and cured, and the steel wire 11 is clamped with the anchor choke 17 to fix the anchor head ( It inserts into the choke insertion hole 13a formed in 13). The steel wires 11 are respectively inserted into the through-holes 57a formed in the steel wire arrangement plate 57 of the hydraulic tensioning device, and at the same time, to the high pressure cylinder 21 and the pulling head 25 for pulling the hydraulic tensioning device. After penetrating through each of the formed through holes 25a, each of the strands of the steel wire 11 is clamped by the pulling choke 27 and inserted into the through holes 25a.

In this state, when the hydraulic pressure is supplied to the first hydraulic chamber 31 through the first hydraulic port 29, the piston 23 moves to the left side in FIG. 1, so that the pulling choke 27 is pulled. It is closely inserted into the tapered through hole 25a formed in the head 25. Thereby, the free field part of the steel wire 11 inserted in the hole 9 formed in the soil wall 7 is tensioned. When the tensioning operation of the steel wire 11 is completed, while closing the valve (not shown) of the first hydraulic port 29, the hydraulic pressure is supplied through the second hydraulic port (33). At this time, since the first hydraulic port 29 is closed, the hydraulic pressure supplied to the second hydraulic port 33 through the hydraulic passage 32 is the nipple 63 and the piston 23 in the stopped state. The oil passage 65 is supplied into the oil chamber 61 formed by the cylinder 50 of the hydraulic tensioning device and the cylindrical portion 53a of the lower cover 53.

Accordingly, the piston 55 moves to the right in FIG. 1 so that the steel wire arrangement plate 57 presses the choke 17 for anchors and closes in the tapered choke insertion hole 13a formed in the anchor head 13. The steel wire 11 is firmly clamped by the click formed on the inner circumferential surface of the choke 17, thereby completing the anchoring work of the earthquake construction.

Thereafter, when the first hydraulic pressure port 29 of the high pressure cylinder 21 for pulling is opened to drain the hydraulic pressure in the first hydraulic pressure chamber 31, the piston 23 moves to the right in FIG. At this time, the pulling choke 27 is pulled to the left from the pulling head 25 and removed, and then pulled out by pulling the pulling head 25, the high pressure cylinder 21 for pulling and the hydraulic tensioning device to the left.

The conventional hydraulic tensioning device as described above is installed between the high-pressure cylinder 21 for pulling and the anchor head 13 for hydraulic tensioning in the tapered choke insertion hole 13a formed in the anchor head 13 in the earth work. The steel wire 11 is tightly anchored by the anchor choke 17 by pressing and pushing the anchor choke 17 by the steel wire arrangement plate 57 of the apparatus, so that the anchor wire can be reliably anchored. Although it is possible to perform anchor work with high efficiency in construction, it is difficult to precisely pull the pulling force or the degree of elongation of the steel wire 11 for the steel wires 11 of different lengths, thereby applying the correct tensile force to each steel wire 11. There is a problem that it becomes difficult, and furthermore, there is a problem that its management is not easy.

In addition, the above-mentioned hydraulic tensioning device for earthquake construction has a problem that not only the structure is complicated but also the mounting and dismantling of the earthquake construction is complicated and the productivity is lowered.

Accordingly, the present invention is to solve the above-described problems, it is possible to simultaneously apply the same tensile force to steel wires of different lengths, and thus it is easy to manage the elongation, it is easy to install and dismantle Its purpose is to provide a static pressure stranded cylinder of simple construction.

1 is an explanatory diagram schematically illustrating a conventional earthquake construction method;

Figure 2 is a cross-sectional view schematically showing a conventional hydraulic tension device for earthquake construction,

3 is a perspective view of a pulling head (or anchor head) applied to the hydraulic tensioning device of FIG.

4 is a cross-sectional view taken along the arrow IV-IV of FIG. 3;

5 is a partial cross-sectional view showing a state in which the earthquake construction is carried out by employing a static pressure strand cable tension cylinder according to an embodiment of the present invention;

Figure 6 is a cross-sectional view of the stretched state showing the configuration of a constant-stretch strand tension cylinder according to an embodiment of the present invention,

7 is a cross-sectional view of the contracted state of FIG.

<Code Description of Main Parts of Drawing>

50: cylinder 50a: threaded portion

50b: Thread 53: Lower Cover

53a: cylinder 55: piston

57: steel wire arrangement plate 59: cover

61: oil chamber 63: nipple

65: oil passage 67: first packing member

69: second packing member 100: static pressure strand tension cylinder (invention)

101: cylinder 102: thread A port

103: room B port 104: bottom plate

105: sleeve 106: jaw opening

110: sleeve portion piston 111: piston

112: jaw phage sleeve 113: through hole

114: inside cone (inclined) 120: chalk

121: jaw 122: jaw open face

123: steel wire gripping surface 124: cone surface

125: elastic ring 130: choke carver

In order to achieve the above object, the static pressure strand cable tension cylinder according to an embodiment of the present invention, the piston in the cylindrical cylinder is installed so as to reciprocate with the oil tight, the cylinder is separated into the chamber A and chamber B by the piston, A fluid cylinder formed with chamber A and chamber B ports connected to chambers A and B, comprising: a bottom plate for closing one side of a cylinder and having a through hole through which steel wire passes; An outer circumferential surface is formed between the inner circumferential surface of the cylinder and is installed so that the piston is oiltightly and reciprocally installed, a steel wire passes through the center, is fixed to the bottom plate, and is formed to extend toward the other side of the cylinder, A sleeve in which a jaw opening is formed; A jaw gripping sleeve fixed to a piston and protruding from the outer circumference of the sleeve to the other end of the cylinder in a fluid and reciprocating manner; And when the jaw phage sleeve is elongated by the interaction with the cone or the inclined inner surface of the jaw phage sleeve, a conical outer surface is formed to tightly grip the steel wire passing through the center when the jaw phage sleeve is extended, and a plurality of wire gripping surfaces are formed on the inner surface thereof. Including chokes of jaws; Conical to inclined inner surfaces are formed at the inner surface of the gripping sleeves, and when the jaw gripping sleeves are contracted, insertion portions are formed in each jaw so as to radially open in interaction with the jaw openings of the sleeve to release the wires. A plurality of jaws of the choke is characterized in that it is stably held by the elastic ring on its outer peripheral surface. The static-stranded strand cylinder is formed to hold steel wires of different thicknesses, the sleeve and the bottom plate are integrally formed, and the piston and The jaw phage sleeve is integrally formed, and the choke carver is preferably provided on the outside of the choke.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a partial cross-sectional view showing a state in which an earthquake construction is performed by employing a static pressure strand tensioning cylinder according to an embodiment of the present invention, and FIG. 6 shows a configuration of the constant pressure strand tensioning cylinder as a cross-sectional view of an extended state of a piston. 7 is a cross-sectional view of the contracted state of FIG.

The static tension strand tension cylinder 100 includes a cylindrical cylinder 101, a piston 111, an A thread port 102 and a B thread port 103, a bottom plate 104, a sleeve 105, and a jaw grip sleeve. 112, and the choke 120, and the choke carver 130 is installed so as to cover the choke 120 from the outer periphery of the protrusion of the sleeve 105.

In FIG. 6 and FIG. 7, the cylinder 101 is installed to be reciprocated while the piston 111 is oiltight, and is separated into the A chamber and the B chamber by the piston 111, and the A chamber and the B chamber are the A chamber ports 102. Fluid is communicated to an external valve, a pump, a fluid tank, etc. via the &quot; B &quot;

The bottom plate 104 is installed to close one side of the cylinder 101, and a through hole through which the steel wire 11 passes is formed in the center thereof.

The sleeve 105 is fixed to the bottom plate 104 and is formed to extend toward the other side of the cylinder 101. The sleeve 105 penetrates through the steel wire 11 in the longitudinal direction at the center thereof, and the outer circumferential surface thereof is , The piston 111 is formed between the inner circumferential surface of the cylinder 101 to be oiltight and reciprocally installed, and its free end is inserted into the choke 120 to open the jaw opening 106 for opening the jaw 121. ) Is formed. Therefore, it is preferable that the jaw opening part 106 is formed in the shape of a truncated cone and a truncated polyhedron with the outer peripheral surface of the sleeve 105 inclined inward from an edge part. 6 and 7, the sleeve 105 and the bottom plate 104 may be integrally formed.

The jaw gripping sleeve 112 is fixed to the piston 111 and protrudes through the other side of the cylinder 101 in an oil-tight and reciprocating manner at the outer circumference of the sleeve 105, and the inner surface of the protruding end portion. In the truncated cone to truncated cone-shaped cone (tilt) inner surface 114 is formed. As illustrated in FIGS. 6 and 7, the piston 111 and the jaw grip sleeve 112 may be integrally formed.

The choke 120 is formed of a plurality of jaws 121 are arranged in the circumferential direction, the outer surface of the jaw 121 is in interaction with the inner surface 114 of the cone (tilt) of the jaw grip sleeve 112. Cone (inclined) outer surface corresponding to the conical (inclined) inner surface 114 of the jaw phage sleeve 112 so that when the jaw phage sleeve 112 is extended, it is tightened to the center side to strongly grip the steel wire 11 passing through the center. 124) is formed in the shape. Further, when the jaw grip sleeve 112 is retracted, the insertion portion of the jaw opening portion 106 is released radially in interaction with the jaw opening portion 106 of the sleeve 105 to release the steel wire 11. 122 is formed. The insertion portion 122 has an extended structure than the steel wire gripping surface 123 for gripping the steel wire 11 so that the jaw opening portion 106 can be inserted at least. Can be formed. In addition, the steel wire gripping surface 123 is preferably formed with teeth so that the steel wire 11 can be strongly gripped. In addition, it is preferable that the elastic ring 125 is installed in the outer circumferential surface receiving groove as shown in FIGS. 6 and 7 so that the plurality of jaws 121 can stably form and maintain the choke 120.

The static pressure strand tension cylinder is preferably provided with a circumferential arrangement interval of the jaw 121 to grip the steel wire 11 of different thickness, and also, the steel wire gripping surface 123 is to grip the steel wire 11 of different thickness. It is desirable to be formed to be.

The choke carver 130 is inserted into the outer circumference of the jaw grip sleeve 112 protruding to contact the upper outer surface of the choke 120 as shown in FIGS. 6 and 7.

The static tension strand tension cylinder 100 configured as described above is firstly detachably fixed to the anchor head 13 as shown in FIG. 5, and the steel wire in the state in which the jaw grip sleeve 112 is contracted as shown in FIG. 7. (11) is inserted in the longitudinal direction of the center. Subsequently, when hydraulic pressure is supplied to the chamber A through the chamber A port 102, the piston 111 and the jaw grip sleeve 112 are lifted by the action of the hydraulic pressure, and the portion protruding from the cylinder 101 is extended. At this time, the fluid is drained from the B chamber via the B chamber port 103.

In the initial stage of expansion of the piston 111 and the jaw grip sleeve 112, the inner surface 114 of the cone (tilt) contacts the outer surface 124 of the cone (tilt), and the cam action strongly contracts the many jaws 121 toward the center. The steel wire 11 penetrates the center thereof, and then stretches until the hydraulic pressure of the chamber A becomes a predetermined hydraulic pressure P, as shown in FIG. It is to be tensioned. Accordingly, in FIG. 5, each of the positive tension strand tension cylinders 100 has a different length, but even if the steel wires 11 have different elongations, the static tension strand tension cylinders 100 may be different from each other. The same adjusted hydraulic pressure is extended until it acts on the chamber A, and the force acting on the steel wire 11 is determined by the hydraulic action area of the piston 111, so that the piston 111 and the jaw grip sleeve 112 protrude. Even if the distances are different from each other, the force acting on the steel wire 11 is the same.

As a result, the force can be evenly distributed to each steel wire so that concentrated load can be prevented and designed in a minimum quantity.

Then, when curing for grouting is completed, when the hydraulic pressure is supplied through the B port port 103 to dismantle the static tension strand cable tension cylinder 100, the hydraulic pressure acts on the B chamber to the piston 111 and the jaw grip The sleeve 112 contracts from the state of FIG. 6 to the state of FIG. 7, wherein the gripping of the steel wire 11 of the choke 120 is released, whereby the choke 120 is retracted together by the choke carver 130. When the jaw opening portion 106 of the sleeve 105 is inserted into the insertion portion 122 provided at the lower end of the choke 120, the jaws 121 of the choke 120 are opened to make it easier. Not only can be dismantled, it is easy to insert the steel wire 11 when reworking.

As described above, the gripping and tensioning of the steel wire 11 can be made simply, and the mounting and dismantling of the positive-stranded strand tension cylinder 100 is made simple, and a plurality of steel wires 11 can also be provided with a simple structure. ) Can be stretched with the same force so as to take the same force even if the length or elongation is different from each other, and accordingly, it is possible to distribute the force such as soil, shaft, etc. to each steel wire 11 evenly. The risk of collapse can be prevented.

As described above, according to the configuration and operation of the static tension strand tension cylinder 100 of the present invention, the jaw grip sleeve 112 and the jaw opening portion 106 are integrally formed with the tension cylinder to simplify components and simplify anchoring. It can be tensioned to a number of steel wires (11) used for earthquake construction with the same force irrespective of its length or elongation to prevent concentrated load and to collapse even with a smaller quantity of steel wires (11) than before. There is a very good effect, such as preventing the risk.

Claims (2)

In the cylindrical cylinder 101, the piston 111 is installed so as to reciprocate with oil tightness, and the cylinder 101 is separated into the A chamber and the B chamber by the piston 111, and the A chamber communicates with the A chamber and the B chamber. In the fluid cylinder in which the port 102 and the B chamber port 103 are formed: A bottom plate 104 which closes one side of the cylinder 101 and has a through hole through which the steel wire 11 passes; An outer circumferential surface is formed between the inner circumferential surface of the cylinder 101 so that the piston 111 is installed in an oil-tight and reciprocating manner, the steel wire 11 passes through the center, and is fixed to the bottom plate 104, and the cylinder ( A sleeve 105 formed to extend toward the other side of the 101 and having a jaw open portion 106 formed at an end thereof; A jaw grip sleeve (112) fixed to the piston (111) and protruding from the outer circumference of the sleeve (105) in an oil-tight and reciprocating manner through the other side of the cylinder (101); And When the jaw gripping sleeve 112 is extended by the interaction with the conical (inclined) inner surface 114 of the jaw gripping sleeve 112, the conical outer surface for tightening the steel wire 11 passing through the center is strongly tightened. 124 is formed, the steel wire gripping surface 123 is configured to include a choke 120 consisting of a plurality of jaws 121 formed on the inner surface; At the inner surface of the protruding end of each of the plurality of jaws 121, a conical (inclined) inner surface 114 is formed in the jaw phage sleeve 112 and the jaw opening of the sleeve 105 when the jaw phage sleeve 112 is retracted. An insertion portion 122 for releasing the steel wire 11 radially apart in interaction with the portion 106 is formed; A plurality of jaws (121) of the choke (120) is a constant-pressure stranded tension cylinder, characterized in that it is kept stable by the elastic ring (125) on its outer peripheral surface. The method according to claim 1, wherein the static pressure strand tension cylinder is formed to hold steel wire (11) of different thickness; The sleeve 105 and the bottom plate 104 are integrally formed, and the piston 111 and the jaw grip sleeve 112 are integrally formed; A static pressure stranded tension cylinder, characterized in that the choke carver 130 is installed outside the choke 120.