KR101781745B1 - Charging apparatus of vacuum furnace - Google Patents

Abstract

The present invention relates to a charging apparatus of a vacuum furnace, which comprises an auxiliary chamber (110), a switching means (120), a guide part (130), a rod (140) and a basket (150). The auxiliary chamber (110) is connected to an upper side of a vacuum chamber (210) having a furnace (211), forms a spherical inner space to maintain a vacuum state, and has a first charging hole (111) formed on one side and made of a dissolvable material. The switching means (120) is formed in a spherical shape corresponding to an inner space of the auxiliary chamber (110), has rotational parts (121) formed on both sides thereof to be rotated based on a horizontal axis (H), and has an inner chamber (122)with a tunnel-shape and is formed on a core part in a direction perpendicular to the horizontal axis (H) to form a second charging hole (123). The guide part (130) is formed on an inner circumferential surface of the inner chamber (122) to have a pipe-body having both open sides and has a locking part (132) positioned on one side to, in order to have a diameter smaller than a passage part (131) positioned on the other side for corresponding to the second charging hole (123). The rod (140) is led into the inner chamber (122) through an upper operation hole (112) of the auxiliary chamber (110) to be reciprocally moved upward and downward and has a detachable groove (141) formed along the outer circumferential surface of a front end. The basket (150) is positioned inside the guide part (130) and is reciprocally moved between the auxiliary chamber (110) and the vacuum chamber (210) through the passage part (131) by a reciprocal operation of the rod (140) to transfer the dissolvable material charged through a third charging hole (151).

Description

{CHARGING APPARATUS OF VACUUM FURNACE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum melting furnace charging apparatus, and more particularly, to an apparatus for charging a vacuum melting furnace in which the interior of a furnace is vacuumed to dissolve a melting material such as a metal, Provision of a vacuum melting furnace charging device capable of reducing the size of the auxiliary chamber and saving the energy and time required for the vacuum state reorganization and the efficiency of the process by constructing the auxiliary chamber of the rotatable charging structure which can be shortened .

Generally, a vacuum melting furnace is a furnace mainly using a metal as a dissolving material and dissolving it in a vacuum state. Since the dissolving process is performed in the vacuum chamber, the inflow of contaminants is minimized and the gas content of the metal is reduced, which is widely used.

Vacuum melting furnaces are roughly classified into resistance type, induction type, and arc type depending on the heating method. Resistance is a method of dissolving metal by using radiating heat using a resistor such as metal or ceramics as a heating element. The induction method dissolves the metal by the electromagnetic induction action and stirs the molten metal uniformly by the electromagnetic force. The arc formula dissolves mainly the refractory metal using arc heat generated by contact between the consumable electrode and the melting furnace.

7, a melting furnace 11 is provided in a vacuum chamber 10 and an auxiliary chamber 12 for charging a molten material is further provided on the upper side of the vacuum chamber 10, (20).

A slot (21) for charging the dissolving material is formed on one side of the auxiliary chamber (20) and a basket (22) for transferring the dissolving material is provided in the auxiliary chamber (20).

The basket 22 is provided to move up and down between the auxiliary chamber 20 and the vacuum chamber 10 by the chain block 23 provided on the upper side of the auxiliary chamber 20. [

Therefore, in order to add a dissolving material to the vacuum melting furnace 11, first, the entry opening 21 of the auxiliary chamber 20 is opened and the chain block 23 is wound up to move the basket 22 to the entry opening 21 .

Next, after the dissolving material is accommodated in the basket 22, the entry port 21 is closed and the vacuum system 30 is operated to create a vacuum state in the auxiliary chamber 20.

The gate valve 12 of the vacuum chamber 10 is opened and the chain block 23 is wound to lower the basket 22 to the melting furnace 11 of the vacuum chamber 10 And is charged down.

That is, the first charging of the dissolving material is performed by dissolving the dissolved material by directly opening the vacuum chamber and then charging the dissolving material to the vacuum furnace. When the vacuum chamber is directly opened, the vacuum state is lost So that the basket is lifted and loaded using the auxiliary chamber.

On the other hand, the known patent No. 10-0679103 discloses a structure in which a dissolvable material can be charged in a different manner from that described above.

And a rotary charging unit for charging the object to be treated into the melting furnace. The rotary charging unit has a structure in which a plurality of mounting arms are formed on a rotary shaft rotated by pneumatic pressure.

Registration No. 10 - 0679103 Registration Utility Model No. 20 - 0316245 Registration Utility Model No. 20 - 0071088 Registration No. 10-0096449

As described above, the conventional vacuum melting furnace charging device has a structure for charging the dissolving material, and includes a chain block which connects the auxiliary chamber to the upper side of the vacuum chamber and lifts the basket.

However, in the conventional vacuum melting furnace charging device, it is difficult to miniaturize the auxiliary chamber due to the volume occupied by the chain block for lifting and lifting the basket, so that the lifting distance of the basket is expanded and the vacuum state is also restored by the vacuum system Energy and time are required.

In addition, due to the structural characteristics of the basket lifted up and down in the vertical direction, the workability of charging the dissolvable material through the intestinal mouth provided in the side wall of the auxiliary chamber is poor, so that the dissolvable material is lost in the auxiliary chamber or deposited on the inner wall. There is a problem that side effects can be caused.

Meanwhile, in the configuration including the rotary loading portion of the registered patent to which the above-described conventional technique is applied, a plurality of mounting arms provided rotatably in the form of a propeller on one side of the melting furnace are used to receive and feed the object to be processed. However, The effect of continuous charging of water can be expected. Therefore, the present invention is not limited to the limit of the prior art.

Accordingly, the present invention has been made to solve the above-mentioned problems,

An auxiliary chamber 110 which is coupled to the upper side of the vacuum chamber 210 provided with the melting furnace 211 and forms a spherical inner space to maintain a vacuum state and forms a first inlet 111 of the molten material, ;

The auxiliary chamber 110 is formed in a spherical shape corresponding to the inner space of the auxiliary chamber 110 and has swivel portions 121 on both sides thereof to rotate on the horizontal axis H and has a tunnel- A switching means (120) having an inner chamber (122) to form a second inlet (123);

A guide portion 132 provided on the inner circumferential surface of the inner chamber 122 and having a smaller diameter than the one passage portion 131 corresponding to the second inlet 123, (130);

The auxiliary chamber 110 is inserted into the inner chamber 122 through the upper operating hole 112 and is reciprocated upward and downward to the deep portion of the guide portion 130, (140);

The third inlet 151 is provided inside the guide part 130 and reciprocates between the auxiliary chamber 110 and the vacuum chamber 210 through the passage part 131 by reciprocating operation of the rod 140, And a basket 150 for transferring the molten material charged through the pipe 150. This arrangement can achieve the object of efficiently increasing the charging process of the molten material.

The present invention has the effect of improving the efficiency of the additional charging process by significantly improving the auxiliary chamber for charging the dissolving material and its associated components in the vacuum melting furnace charging device.

Particularly, the auxiliary chamber can be greatly reduced in size compared with the prior art through a series of arrangements such as mounting a switching means for implementing a basket rotatably inside the auxiliary chamber, There is an advantage such as minimizing the distance.

Therefore, it is possible to reduce the energy required for the resurfacing of the vacuum state at the time of addition of the dissolving material and to shorten the time required for the process, thereby improving the process efficiency and significantly improving the charging workability of the dissolving material, There is an advantage that an additional charging process is performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vacuum melting furnace charging device according to an embodiment of the present invention; FIG.
2 is a planar perspective view according to an embodiment of the apparatus for charging a vacuum melting furnace of the present invention.
3 is a front perspective view showing a state in which the switching means 120 is rotated from the horizontal axis H in the embodiment of the apparatus for charging a vacuum melting furnace of the present invention.
4 is an enlarged view of the main part of Fig.
Fig. 5 is a view showing an example of the operating state according to the embodiment of the apparatus for charging a vacuum melting furnace of the present invention. Fig.
6 is an exemplary operational state of the switching means 120 according to the embodiment of the apparatus for charging a vacuum melting furnace of the present invention.
7 is a schematic configuration diagram of a conventional vacuum melting furnace charging device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vacuum melting furnace charging apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of an apparatus for charging a vacuum melting furnace of the present invention, FIG. 2 is a plan perspective view of an apparatus for charging a vacuum melting furnace of the present invention, and FIG. Fig. 4 is an enlarged view of the main part of Fig. 3, Fig. 5 is an explanatory view of an operating state according to the embodiment of the vacuum melting furnace charging apparatus of the present invention, Fig. 6 is an exemplary operating state of the switching means 120 according to the embodiment of the apparatus for charging a vacuum melting furnace of the present invention, and Fig. 7 is a schematic constitutional view of a vacuum melting furnace charging apparatus of the prior art.

The vacuum melting furnace charging device to which the technique of the present invention is applied is constructed by rotating the internal structure of the auxiliary chamber 110 so that the scale of the auxiliary chamber 110 is remarkably reduced so that the lifting and lowering of the basket 150 It is noted that the present invention relates to a vacuum melting furnace charging apparatus that greatly shortens a series of processes required for vacuum state remanufacturing and saves energy and time required for efficient process.

1 to 3, the apparatus for charging a vacuum melting furnace according to the present invention comprises an auxiliary chamber 110 coupled to the upper side of a vacuum chamber 210 provided with a melting furnace 211, A rod 140 which reciprocates to the core of the guide portion 130 and a guide portion 130 which is provided in the inner chamber 122 of the switching means 120, And a basket 150 for moving the molten material while raising and lowering the auxiliary chamber 110 and the vacuum chamber 210 by the rod 140.

The auxiliary chamber 110 has a predetermined flange (not shown) on its upper and lower sides, and a connection hole 113 formed on the lower side is coupled to correspond to the inlet of the vacuum chamber 210. A spherical inner space is formed in the interior of the auxiliary chamber 110 to maintain a vacuum state by a vacuum system such as a vacuum pump.

A first inlet (111) of the dissolvable material is formed on one side of the auxiliary chamber (110). In the preferred embodiment of the present invention, the connection hole 113 is formed on the lower side of the auxiliary chamber 110, and the horizontal axis H is vertical to the horizontal axis H, It is to be understood that the first inlet 111 may be formed on the front surface of the auxiliary chamber 110 but may be set in any direction perpendicular to the horizontal axis H. [

The switching means 120 is formed in a spherical shape corresponding to the inner space of the auxiliary chamber 110 and has swivel portions 121 functioning as shafts for rotating the switching means 120 on the horizontal axis H So that the switching means 120 rotates in the inner space of the auxiliary chamber 110 from the horizontal axis H as a starting point.

That is, the switching means 120 is rotated by the pivoting means 124 provided at one side of the pivoting portion 121, and the first inlet 111 formed on the front surface of the auxiliary chamber 110 and the switching means 120 And an angle range in which a position corresponding to the connection hole 113 communicating with the vacuum chamber 210 coupled to the vertically lower side of the auxiliary chamber 110 is rotated from a position where the second inlet 123 faces each other, (A).

It is preferable that the vacuum state is maintained even when the switching means 120 is rotated through the seat ring type airtight means 114 between the switching means 120 and the auxiliary chamber 110.

On the other hand, in the core portion of the switching means 120, a tunnel inner chamber 122 is provided in a direction perpendicular to the horizontal axis H, that is, in a direction perpendicular to the rotary portion 121 provided on both sides of the switching means 120 And the second inlet 123 is formed on one side.

The guide portion 130 is provided on the inner circumferential surface of the inner chamber 122 of the switching means 120 so as to open on both sides thereof to guide the basket 150.

The guide portion 130 is provided with a passage portion 131 at a position corresponding to the second inlet 123 and a second engagement portion 132 having a smaller diameter than the one passage portion 131 is provided in the passage portion 131 As shown in Fig.

A guide protrusion 133 elastically protruding from the inner circumferential surface of the guide part 130 is formed to elastically press the outer circumferential surface of the basket 150 when lifting the basket 150 to guide the basket part 150 in the correct position.

4, when the basket 150 is brought into contact with the inner circumferential surface of the guide part 130, the guide protrusion 133 presses the basket 150 in a flattened shape, And guides the latch lever 155 to be accurately positioned in the latching part 132 of the guide part 130 in the process of the basket 150 to be described later entering the guide part 130. [

Further, as shown in Fig. 5, when the basket 150 descends and is not in contact, the projecting portions are elastically restored and provided in a raised shape. Therefore, it is preferable that the guide protrusion 133 is made of a material having a mechanical property to hold an elastic force.

The rod 140 is inserted into the inner chamber 122 through the upper operation hole 112 of the auxiliary chamber 110 and is reciprocated upward and downward to the deep portion of the guide portion 130. Of course, a sealing structure (not shown) should be provided between the rod 140 and the operating hole 112 to maintain the vacuum state closely.

A detachable groove 141 is formed along the outer circumferential surface of the rod 140 so that the detachable protrusion 154 provided on the detachment means 153 of the basket 150 to be described later is inserted and detached.

The basket 150 is provided inside the guide part 130 and reciprocates between the auxiliary chamber 110 and the vacuum chamber 210 through the passage part 131 by reciprocating operation of the rod 140, The molten material charged through the inlet 151 is transferred.

The structure of the basket 150 will be described in detail with reference to FIG. 3 (a) to 3 (c), so that the molten material is loaded in the direction of facing the passage portion 131 of the second inlet 123 of the switching means 120 and the guide portion 130. An inlet 151 is formed.

3 to 4, a detaching means 153 protruding outside the engaging portion 132 of the guide portion 130 is fixed to an opposite side of the third inlet 151 .

The detachment means 153 includes a plurality of detachable protrusions 154 which are formed with through holes 152 corresponding to the outer diameter of the rod 140 and which are resiliently protruded to the inside of the through holes 152 as described above. Therefore, as the rod 140 is pulled into or pulled out from the attachment / detachment groove 141 of the rod 140 which reciprocates up and down, the rod 140 is detached from the basket 150.

The basket 150 is provided with a pair of latching levers 155 which are provided so as to be opposed to each other below the attaching and detaching means 153 so that the basket 150 stably stays on the guide unit 130 when the basket 150 is lifted and stopped. .

The engaging lever 155 is formed in a shape of a letter "B" which forms a head 157 and a locking protrusion 158 at both ends around the hinge portion 156. The engaging lever 155 engages with the head 157 of the engaging lever 155, Are hinged to the basket (150) so as to overlap each other vertically below the through hole (152) of the detachment means (153).

5, when the tip of the rod 140 which reciprocates upward and downward through the detachable means 153 presses the head 157, the latching jaw 158 is pushed by the hinge operation, The basket 150 is lifted and lowered through the passage part 131 of the guide part 130 by being detached from the locking part 132 of the guide part 130.

4, when the distal end of the rod 140 is retracted, the stopper 158 returns to its original position by the elastic member 159 so that the basket 150 is fixed to the guide unit 130 . Of course, the elastic member 159 is fixed between the engagement lever 155 and the basket 150 so that the stopping jaw 158 is tensioned in the direction of engaging the engagement portion 132 of the guide portion 130 Respectively.

The operation state of the process of charging the molten material of the vacuum melting furnace charging device to which the technique of the present invention having the above-described structure is applied will be described below.

The melting furnace 211 of the vacuum chamber 210 in which the dissolving material is initially charged is in a state in which a proper vacuum state is established by a vacuum system (not shown). In order to charge the additional dissolving material, 6 (a), the switching means 120 of the auxiliary chamber 110 is pivoted to the position where the second inlet 123 faces the first inlet 111, (H) as a starting point.

The connection hole 113 communicating with the vacuum chamber 210 is automatically closed by the rotation of the switching means 120 and the third inlet 151 of the basket 150 receiving the dissolving material is also closed 2 inlet 123 and the first inlet 111. In this way,

The first inlet 111 of the auxiliary chamber 110 and the second inlet 123 of the switching means 120 are opened and the dissolving material is charged through the third inlet 151 of the basket 150 Then close the Chapter 3 inlet (151).

The basket 150 is melted by the heat transfer near the melting furnace 211 by using a material wire (not shown) which is thermally melted when the third inlet 151 is heated to a predetermined temperature, The inlet 151 can be configured to be opened.

When the dissolving material is received in the basket 150 as described above, the first inlet 111 is closed and the horizontal axis H is used as the starting point of the rotation of the first inlet 111 of the basket 150 as shown in Figs. 3 to 5 or 6 The switching means 120 is rotated.

At this time, the rotation angle of the switching means 120 is changed from the angular range A between the first inlet 111 located on the front surface of the auxiliary chamber 110 and the connection hole 113 located on the lower side of the auxiliary chamber 110 And is rotated on the horizontal axis H as a starting point. The connection hole 113 of the auxiliary chamber 110 is automatically opened and communicated with the vacuum chamber 210 by the rotation of the switching means 120 as described above.

The rod 140 interposed in the upper operation hole 112 of the auxiliary chamber 110 is operated downward to enter the through hole 152 of the detachment means 153 located on the upper side of the basket 150, The attaching / detaching projection 154 of the attaching / detaching means 153 is retracted by the elasticity of the attaching / detaching groove 141 formed at the front end of the basket 150 to be interposed between the rod 140 and the basket 150.

At the same time, the tip of the downward rod 140 is hinged while pushing the head 157 of the latch lever 155 so that the latching jaw 158 is detached from the latching portion 132 of the guide portion 130, 150 are moved downward along the inner peripheral surface of the guide.

The guide protrusion 133 protruding from the inner circumferential surface of the guide part 130 guides the stable movement of the basket 150 while pressing the outer circumferential surface of the basket 150.

When the basket 150 is moved upwards after the additional charging of the dissolving material is completed, the guide protrusion 133 is caught by the guide part 130 in the process of the basket 150 entering the guide part 130, And guides the engaging lever 155 to the correct position of the engaging lever 155. [

The basket 150 moving downward by the operation of the rod 140 is guided to the auxiliary chamber 110 through the passage part 131 of the guide part 130 and the second inlet 123 of the switching device 120, Through the connection hole 113 of the vacuum chamber 210 and the vacuum chamber 210.

When the basket 150 approaches the melting furnace 211, the predetermined wire which has closed the third inlet 151 of the basket 150 is melted and the third inlet 151 is opened, Is introduced into the melting furnace 211.

Therefore, the vacuum melting furnace charging apparatus according to the present invention can greatly reduce the size of the auxiliary chamber 110 as compared with the prior art, thereby minimizing the movement distance of the basket 150. Therefore, it is possible to reduce the energy required for the resurfacing of the vacuum state at the time of addition of the dissolving material and to shorten the time required for the process, thereby improving the efficiency of the process and significantly improving the charging workability of the dissolution material. There is an advantage that the charging process is carried out.

110: auxiliary chamber 111:
112: Operator ball 113: Connector
114: airtight means 120: switching means
121: Rotating part 122: Inner room
123: Chapter 2 Entrance 124: Rotating means
130: guide part 131: passage part
132: latching portion 133: guide projection portion
140: rod 141: detachable groove
150: Basket 151: Chapter 3 Entrance
152: through hole 153: detachment means
154: detachment protrusion 155: latching lever
156: hinge part 157: head
158: latching jaw 159: elastic member
H: Horizontal axis 210: Vacuum chamber
211: melting furnace

Claims (5)

An auxiliary chamber 110 which is coupled to the upper side of the vacuum chamber 210 provided with the melting furnace 211 and forms a spherical inner space to maintain a vacuum state and forms a first inlet 111 of the molten material, ;
The auxiliary chamber 110 is formed in a spherical shape corresponding to the inner space of the auxiliary chamber 110 and has swivel portions 121 on both sides thereof to rotate on the horizontal axis H and has a tunnel- A switching means (120) having an inner chamber (122) to form a second inlet (123);
A guide portion 132 provided on the inner circumferential surface of the inner chamber 122 and having a smaller diameter than the one passage portion 131 corresponding to the second inlet 123, (130);
The auxiliary chamber 110 is inserted into the inner chamber 122 through the upper operating hole 112 and is reciprocated upward and downward to the deep portion of the guide portion 130, (140);
The third inlet 151 is provided inside the guide part 130 and reciprocates between the auxiliary chamber 110 and the vacuum chamber 210 through the passage part 131 by reciprocating operation of the rod 140, And a basket (150) for transferring the molten material charged through the pipe (150). The method according to claim 1,
The switching means 120 is rotated by the pivoting means 124 provided at one side of the pivoting portion 121 so as to be pivoted on the basis of the position where the first inlet 111 and the second inlet 123 face each other, Wherein the vacuum hole is rotatable in an angular range (A) in which a position corresponding to a connection hole (113) communicating with a vacuum chamber (210) coupled to a vertically lower portion of the chamber (110) . The method according to claim 1,
The basket 150 is fixed to the opposite side of the third inlet 151 and protrudes to the outside of the latching part 132 of the guide part 130. The through hole 152 corresponding to the outer diameter of the rod 140 (153) for forming a contact portion (153);
The detachable means 153 is provided with a plurality of detachable protrusions 154 elastically protruding inwardly of the through holes 152 and is inserted into or detached from the detachable groove 141 of the rod 140 which reciprocates up and down And the load (140) and the basket (150) are attached and detached from each other. The method according to claim 1,
Wherein a guide protrusion (133) elastically protruding is formed on an inner circumferential surface of the guide part (130) to elastically press the outer circumferential surface of the basket (150) when the basket (150) Charging device. The method according to claim 1 or 3,
The basket (150) is provided with a pair of engagement levers (155) provided below the detachable means (153) so as to face each other;
The latching lever 155,
And the head 157 of the both side engaging levers 155 is formed in a shape of a letter "B" having a hinge portion 156 formed at both ends thereof with a head 157 and a locking protrusion 158, Hinged to the basket (150) so as to overlap each other vertically below the through hole (152);
When the tip of the rod 140 which reciprocates upward and downward through the detaching means 153 presses the head 157, the latching jaw 158 is moved by the hinge operation to the latching portion 132 of the guide portion 130 So that the basket 150 ascends and descends through the passage portion 131 of the guide portion 130;
When the distal end of the rod 140 is retracted, the stopper 158 is returned to its original position by the elastic member 159 and the basket 150 is fixed to the guide unit 130 Characterized by a vacuum melting furnace charging device.

Images