KR20100096887A - Jig for unloading valve - Google Patents

Abstract

PURPOSE: A jig for unloading a valve using a supporting part is provided to recycle a supporting part even if, the supporting part is separated from a main body by connecting a jig and a supporting part using a thread-combine method. CONSTITUTION: A jig for unloading a valve using a supporting part comprises a combining part(110), a handle part(120) and an impact member(130). One end of the combining part is fixed and coupled in a screw hole(38) of a supporting part(36). The handle part is installed in the combining part. The impact member is formed on the combining part. The impact member separates the supporting part from a main body using impact force.

Description

JIG FOR UNLOADING VALVE {JIG FOR UNLOADING VALVE}

The present invention relates to an unloading valve, and more particularly, to a jig for an unloading valve that separates a support portion supporting a piston from a main body and is combined with a separation portion to reuse the separated support portion.

In general, a steel mill is used to grapple (grapple) for picking up and moving various scraps. Such grapples are used in cranes, hoists or vehicles.

The crane is mainly composed of a rotatable swing, a main boom hinged to the end of the swing, an outer boom coupled to the end of the main boom and rotatably installed and an extension boom removably installed on the outer boom. A grapple composed of a plurality of tongs is installed on the rotator installed at the end of the extension boom.

Grapple is a gripping mechanism that is used to grab scraps such as scrap metal, and when loading and unloading, and a plurality of tongs are installed radially. These tongs are retracted as the hydraulic pressure acts on each other to generate a gripping force, and when the hydraulic pressure is removed, the gripping force is released to release scrap metal.

The tongs are provided with a hydraulic cylinder for inducing and unfolding them and an unloading valve for controlling the hydraulic cylinder. The unloading valve is configured to selectively open and close the flow path according to an electric signal to control the movement of the hydraulic oil to the hydraulic cylinder.

On the other hand, the unloading valve has a built-in piston for opening and closing the flow path while moving in accordance with the electrical signal, it is provided with a support for supporting such a piston. The support part is provided with an O-ring to prevent leakage of oil to be pressed into the unloading valve body.

When the piston of the conventional unloading valve is damaged or the O-ring is worn, it is necessary to separate the support from the unloading valve body.

To disassemble the support, first, the disassembly rod is welded to the support, and then the operator pulls the disassembly rod to separate the press-fitted support from the unloading valve body.

However, since the support and the disassembly rod are joined by welding, there is a problem that the support is separated and then cannot be reused.

And, in the process of separating the support for the piston replacement, the operator usually repeats the operation of pulling the disassembly rod several times, the flow of the support is generated for a long time. As a result, excessive contact between the O-ring and the main body may cause the O-ring to be broken.

Therefore, there is a need for improvement.

The present invention has been made to improve the above problems, and relates to a jig for an unloading valve that can be reused even if the support is separated, and suppresses the damage of the normal O-ring during the support detachment process.

In order to achieve the above object, the present invention provides a coupling portion having one end fastened to a screw hole formed in the support portion; And it provides a jig for an unloading valve comprising a handle portion provided in the coupling portion.

The coupling portion is characterized in that the impact member for separating the support portion by the impact force.

The impact member is a shock impingement sliding in the coupling portion; And an impact generating unit provided at the other end of the coupling unit and colliding with the impact adding unit.

Jig for the unloading valve according to the present invention is screwed with the support, there is an effect that the support is separated from the body and then reused.

Jig for the unloading valve according to the present invention by the impact force is applied to the engaging portion to pull the support, there is an effect that allows the operator to remove the support from the body with less force.

The jig for unloading valve according to the present invention has an effect of preventing the O-ring from being damaged by reducing the contact time between the O-ring and the main body provided on the outer circumferential surface of the support part by the impact force acting for a short time during the support part separation process.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a jig for an unloading valve according to the present invention. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a view showing a grapple provided with an unloading valve according to an embodiment of the present invention, Figure 2 is an exploded perspective view schematically showing the unloading valve and jig according to an embodiment of the present invention.

3 is a view illustrating a state in which an unloading valve and a jig are coupled according to an embodiment of the present invention, and FIG. 4 is a view illustrating a state in which a support part is separated using a jig according to an embodiment of the present invention. .

Referring to FIG. 1, a grapple 10 according to an embodiment of the present invention includes a body 11, a forceps 12, a cylinder 13, and a hydraulic part 20.

The body 11 is connected to a crane, a hoist or a vehicle, etc. A plurality of tongs 12 are hinged 14 to the outer circumferential surface thereof.

One end of the cylinder 13 is coupled to the body 11 and the other end is coupled to the tongs 12, the length is variable. As the cylinder 13 is operated, the tongs 12 are pinched or unfolded to pick up or place the scrap.

The hydraulic part 20 is provided in the body 11. The hydraulic unit 20 is provided with a direction valve and an unloading valve to adjust the hydraulic amount in addition to the hydraulic pump. One end of the hydraulic hose 15 is connected to the valve and the other end is connected to the cylinder 13 to supply pressure oil to the cylinder 13.

2 to 4, the unloading valve 30 according to an embodiment of the present invention selectively opens and closes a plurality of flow paths 39 formed therein to adjust hydraulic pressure.

The main body 31 of the unloading valve 30 is provided with a protrusion 32 protruding to one side. An insertion hole 33 is formed in the protrusion 32, and the insertion hole 33 communicates with a flow path 39 formed inside the main body 31.

The piston 34, the elastic body 35, and the support part 36 are inserted through the insertion hole 33 of the protrusion 32. The piston 34 is embedded in the main body 31 through the insertion hole 33, is moved in one direction in accordance with the electrical signal to open and close the flow path. The support part 36 is pressed into the insertion hole 33 to close the insertion hole 33, thereby preventing the piston 34 from being separated and blocking oil from being discharged. The elastic body 35 is positioned between the piston 34 and the support 36 to elastically support the piston 34. O-ring 37 is provided on the outer circumferential surface of the support portion 36, the O-ring 37 is located between the insertion hole 33 and the support portion 36 to prevent leakage.

Reference numeral 16 is a connection part connected to the hydraulic hose 15 of FIG.

On the other hand, the present invention relates to a jig 100 for separating the support portion 36 of the unloading valve 30 from the main body 31, the jig 100 will be described in detail below, the piston 34 is Description of the specific configuration and operation relationship of the unloading valve 30 for opening and closing the flow path will be omitted.

The jig 100 according to the embodiment of the present invention is provided with a coupling part 110 and a handle part 120.

Coupling portion 110 has a rod shape and one end is detachable to the support portion (36). For this purpose, a screw hole 38 is formed in the support part 36, and a screw fastening part 111 is screwed into the screw hole 38 and coupled to the support part 36 at one end of the coupling part 110. .

Handle portion 120 is provided in the lateral direction of the coupling portion 110 and has a shape that can be caught by the operator. Handle portion 120 may be integrally formed or coupled to the coupling portion 110, the coupling portion of the handle portion 120 and the coupling portion 110 is not broken even if an external force acts on the handle portion 120 Has strength.

Therefore, the operator pulls the handle part 120 to separate the support part 36 coupled with the coupling part 110 from the protrusion part 32. At this time, the main body 31 of the unloading valve 30 is fixed by the fixing means.

Jig 100 according to an embodiment of the present invention is provided with an impact member 130. The impact member 130 is to provide a shock force to the coupling portion 110 to separate the support portion 36, the impact impact portion 131 and the impact generating portion 132 is provided.

A through hole 131a is formed in the impact applying part 131, and the coupling part 110 penetrates the through hole 131a. Therefore, the impact imparting part 131 is slidably moved in a state in which the coupling part 110 is wrapped.

The impact generating unit 132 is provided at the other end of the coupling unit 110 and the impact impact unit 131 that slides is collided. The impact generating unit 132 has a coupling strength that does not fracture the coupling portion with the coupling portion 110 by the impact impact portion 131.

Referring to the action of the jig for an unloading valve according to an embodiment of the present invention having the structure as described above are as follows.

An insertion hole 33 is formed in the protrusion 32 formed in the main body 31 of the unloading valve 30, and the piston 34 and the elastic body 35 are inserted through the insertion hole 33, and a support part. 36 is pressed into the protrusion 32 and fixed. At this time, the outer circumferential surface of the support part 36 is provided with an O-ring 37 to contact the inner circumferential surface of the protrusion part 32, thereby preventing leakage.

In the above state, the piston 34 is moved in one direction by the electrical signal to press the elastic body 35, or as the electrical signal is removed, the flow path 39 in the process of returning the piston by the restoring force of the elastic body 35. ) Is opened and closed to adjust the hydraulic pressure supplied to the cylinder (13).

When damage occurs to the piston 34 or the O-ring 37, the support part 36 is separated from the protrusion 32 using the jig 100 while the main body 31 is fixed to the fixing means.

That is, the worker pulls the handle part 120 in a state in which the screw fastening part 111 formed at one end of the coupling part 110 is fastened to the screw hole 38 of the support part 36.

On the other hand, the coupling portion 110 is provided with an impact member 130 is separated from the support portion 36 by the impact force.

That is, when a worker hits the impact adder 131 located close to the handle part 120 using a tool or the like, the impact adder 131 is slid and moved on the coupling part 110 and the impact generator 132. Bumps into

As a result, the impact generating unit 132 generates an impact force due to a collision with the impact impingement unit 131, and the impact force is transmitted to the coupling unit 110 so that the coupling unit 110 pulls the support unit 36.

On the other hand, since the impact force is generated and disappeared in a short time, since the support portion 36 tends to be instantly separated by the impact force, the O-ring 37 and the inner surface of the protruding portion 32 and the O-ring 37 provided on the outer circumferential surface of the support portion 36 Reduce the contact time of the O-ring (37) to prevent damage.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a view showing a grapple provided with an unloading valve according to an embodiment of the present invention.

2 is an exploded perspective view schematically showing an unloading valve and a jig according to an embodiment of the present invention.

3 is a view illustrating a state in which an unloading valve and a jig are coupled according to an embodiment of the present invention.

4 is a view showing a state in which the support is separated using a jig according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

31: main body 32: protrusion

33: insertion hole 34: piston

35 elastic body 36 support part

37: O-ring 38: screw hole

110: coupling part 111: screw connection part

120: handle portion 130: impact member

131: impact analysis 132: shock generation unit

Claims (3)

A coupling part having one end coupled to a screw hole formed in the support part; And Jig for an unloading valve comprising a handle portion provided in the coupling portion. The method of claim 1, Jig for the unloading valve, characterized in that the engaging portion is provided with an impact member for separating the support portion by the impact force. The method of claim 2, wherein the impact member Impact impact sliding in the coupling portion; And The jig for the unloading valve is provided on the other end of the coupling portion and comprises an impact generating portion impact the impact impingement.

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