Chute transmission protection mechanism of vacuum induction furnace

Abstract

The utility model relates to the technical field of improvement of vacuum induction furnace chute devices, and discloses a vacuum induction furnace chute transmission protection mechanism which comprises chute rails, the chute rails comprise first chute rails and second chute rails, the first chute rails are arranged on the two sides of a chute chamber, and the second chute rails are arranged on the two sides of the chute chamber. The second chute rails are arranged on the two sides of the smelting chamber, a first interval is formed between the first end of each second chute rail and the first chute rail, the first interval is used for arranging a chute chamber isolation valve, and the second end of each second chute rail extends to a steel pouring station; therefore, the chute trolley can advance to a correct steel casting position along the second chute track. The device has the beneficial effects that the original smelting chamber inner track and the furnace body and furnace frame section track are adjusted into the second chute track, so that an ingot mould trolley can be effectively prevented from colliding with the chute track of the furnace body and furnace frame section when entering a pouring position, and the chute trolley can be ensured to advance to a correct steel pouring position only along the second chute track.

Description

Technical Field

[0001] The utility model relates to the technical field of improvement of a chute device of a vacuum induction furnace, in particular to a transmission protection mechanism for a chute of a vacuum induction furnace. Background Art

[0002] Vacuum induction furnaces are commonly used for smelting special materials. During the electromagnetic induction process, the furnace generates eddy currents, melting the metal raw materials within, thereby achieving the goal of smelting high-purity metals and alloys. The chute chamber of current domestic vacuum induction furnaces is unique in that it utilizes a double-layer, water-cooled structure with an inner 304 stainless steel structure. The chute chamber is compact and houses a mobile trolley and chute. A patented chain driven by a single-sided reduction motor with an encoder precisely moves the trolley. The chamber is equipped with a chute chamber isolation valve, installed between the chute chamber and the melting chamber. This valve provides a bidirectional seal, ensuring a good seal even when a pressure differential (1 bar) exists between the left and right chambers. Due to the chute chamber isolation valve, the chute track is typically divided into three sections: the chute chamber section, the melting chamber section, and the furnace body and grate section. This can lead to problems with the chute drive system during production and use.

[0003] Due to the different ingot shapes required for production, the specifications of the chute and casting molds are different, and the entire melting, production and casting process is carried out under vacuum, and the condition of the equipment in the furnace cannot be detected. The following problems often occur during production and use: the chute track height of the furnace body and grate section is fixed, and the casting molds of different specifications used in production have different heights. Some misoperations when placing the molds will cause the ingot mold trolley to collide with the chute track of the furnace body and grate section when it enters the casting position. The crooked chute track will affect the subsequent chute trolley that enters and cannot move to the correct steel pouring position, thereby failing to complete the steel pouring operation smoothly. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum induction furnace chute transmission protection mechanism to solve the problem in the above background technology that the chute track of the furnace body and grate section is knocked crooked and the chute trolley cannot move forward to the correct steel pouring position.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vacuum induction furnace chute transmission protection mechanism, comprising: a chute track, the chute track comprising a first chute track and a second chute track, the first chute track being arranged on both sides of the chute chamber, the second chute track being arranged on both sides of the smelting chamber, and a first gap being provided between the first end of the second chute track and the first chute track, the first gap being used to set a chute chamber isolation valve, the second end of the second chute track extending to the steel pouring station, so that the chute trolley can move along the second chute track to the correct steel pouring position. Through this arrangement, the original smelting chamber chute trolley track and the furnace body grate section chute trolley track are improved into a second chute track, a first gap for setting a chute chamber isolation valve is provided between its first end and the first chute track, and its second end extends to the steel pouring station, ensuring that the chute trolley can move along the second chute track to the correct steel pouring position, without the need to set up a chute track for the furnace body grate section separately, and the improved second track will not affect the furnace body tilting and steel pouring action, that is, it avoids the situation where the ingot mold trolley hits the chute track of the furnace body grate section.

[0006] The invention also includes a chain protection assembly, which includes a chain protection plate and a clamping member. A chain receiving groove with an upper opening is installed on the first chute track on one side of the chute chamber, and the chain receiving groove extends along the length of the first chute track. A chain driven by a reducer is arranged in the chain receiving groove. The chain protection plate includes a support section and a guard section. The first end of the support section is fixedly connected to the bottom surface of the chain receiving groove, and the second end of the support section is vertically connected to the first end of the guard section. There is a second gap between the second end of the guard section and the outer plate of the chain receiving groove near the chute trolley. This second gap is used to prevent the chain from escaping from the chain receiving groove and ensure that the chain is connected to the chute trolley through the mounting plate. The clamping member is used to clamp the guard section in the vertical direction to prevent the guard section from being deformed by force. By increasing the width of the guard plate and reducing the second gap, the chain can be better prevented from derailing without affecting the forward trajectory of the chute trolley. The provision of the clamping member further prevents the chain protection plate from being deformed by force and the chain from derailing.

[0007] The plurality of pressing members are installed at intervals along the length of the first chute track on the inner wall of the chute chamber, with the pressing ends of the pressing members vertically abutting the guard section. The plurality of pressing members improves the pressing effect and prevents deformation of the chain guard plate and chain derailment.

[0008] The compression member includes a compression screw and a fixing plate. The first end of the fixing plate is fixed to the inner wall of the chute chamber, and the compression screw is mounted on the second end of the fixing plate. The compression screw abuts the guard section in a vertical direction. This arrangement allows the compression member to apply downward force to the guard section using a screw jackscrew, preventing deformation of the chain guard plate and chain derailment.

[0009] The number of fixing plates and compression screws is multiple, and the fixing plates are installed at intervals along the length of the first chute track on the inner wall of one side of the chute chamber. The compression screws are connected to the fixing plates in a one-to-one correspondence. By providing multiple sets of fixing plates and compression screws, the compression effect is improved and deformation of the protective section is prevented.

[0010] There is one fixing plate and several pressing screws. The fixing plate is arranged on one inner wall of the chute chamber along the length of the first chute track, and the pressing screws are installed at intervals on the fixing plate. By providing multiple pressing screws, the pressing effect is improved and deformation of the protective section is prevented.

[0011] The width of the protective section from its first end to its second end is 1 / 3 to 1 / 2 of the distance from the support section to the outer plate of the chain receiving groove. This setting increases the width of the protective section without affecting the connection between the chain and the chute trolley, thereby better preventing the chain from derailing.

[0012] The second chute track is made of rectangular steel. This arrangement makes it easy to obtain materials and saves costs.

[0013] Bearing seats are installed at intervals on the second chute track, and pulleys are rotatably installed on the bearing seats to receive the chute trolley driven by the chain through the pulleys.

[0014] Bearing seats are installed at intervals on the first chute track, and pulleys are rotatably installed on the bearing seats to receive the chute trolley driven by the chain through the pulleys.

[0015] The utility model has the following advantages over the prior art:

[0016] 1. The chute transmission protection mechanism of the vacuum induction furnace of the present invention improves the original chute track of the melting chamber section and the chute track of the furnace body and grate section into a second chute track. The second end of the second chute track extends to the steel pouring station, ensuring that the chute trolley can move along the second chute track to the correct steel pouring position of 2450mm, and will not hit the second chute track when the furnace body is tilted to the maximum steel pouring angle. The above improvement effectively prevents the ingot mold trolley from hitting the chute track of the furnace body and grate section when it moves into the pouring position.

[0017] 2. The chute transmission protection mechanism of the vacuum induction furnace of the present invention is designed to prevent chain derailment accidents frequently due to the insufficient top protection area of ​​the original chain guard plate. In this improvement, the width of the guard section is expanded, thereby reducing the second gap between the second end of the guard section and the outer plate of the chain accommodating trough near the chute trolley. At the same time, the mounting plate can also pass through the second gap to connect the chain to the chute trolley. This improvement can better prevent chain derailment without affecting the forward trajectory of the chute trolley. In addition, a clamping member is provided for vertically compressing the guard section to prevent deformation of the guard section and chain derailment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the distribution of the first chute track and the second chute track in the chute transmission protection mechanism of the vacuum induction furnace in an embodiment of the present utility model;

[0019] Figure 2 This is a structural diagram of a vacuum induction furnace chute transmission protection mechanism in an embodiment of the present invention without a chain protection component;

[0020] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0021] Figure 4 This is a structural diagram of a chain protection assembly provided in a chute transmission protection mechanism of a vacuum induction furnace in an embodiment of the present utility model;

[0022] Figure 5 for Figure 4 A magnified schematic diagram of point B in the middle;

[0023] In the figure: 1. chute chamber; 2. smelting chamber; 3. furnace body and grate section; 4. first chute track; 5. second chute track; 6. chute chamber isolation valve; 7. reducer; 8. chain; 9. chain receiving groove; 10. chain protection plate; 11. support section; 12. protection section; 13. second spacer; 14. pressing screw; 15. fixing plate; 16. bearing seat; 17. pulley; 18. mounting plate; 19. chute trolley; 20. furnace body. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0026] In addition, it should be understood that for the convenience of description, the sizes of the various components shown in the drawings are not drawn according to the actual scale.

[0027] It should be noted that like numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures.

[0028] Example:

[0029] like Figure 1 As shown, the utility model provides a vacuum induction furnace chute transmission protection mechanism, including: a chute track, the chute track including a first chute track 4 and a second chute track 5, the first chute track 4 is arranged on both sides of the chute chamber 1, the second chute track 5 is arranged on both sides of the smelting chamber 2, and there is a first gap between the first end of the second chute track 5 and the first chute track 4, the first gap is used to set the chute chamber isolation valve 6, the chute chamber isolation valve 6 has a two-way sealing function, which can meet the good sealing requirements when there is a pressure difference between the left and right chambers (1 bar), the second end of the second chute track 5 extends to the steel pouring station, so that the chute trolley 19 can move along the second chute track 5 to the correct steel pouring position. In this example, the existing smelting chamber chute trolley track and furnace body grate section chute trolley track are upgraded to a second chute track. A first gap is defined between the first end of the second chute track and the first chute track, for installing a chute chamber isolation valve. The second end of the second chute track extends to the steel pouring station. This ensures that the chute trolley can advance to the correct steel pouring position along the second chute track, eliminating the need for a separate chute track in the furnace body grate section. This prevents the ingot mold trolley from colliding with the chute track in the furnace body grate section. The distance between the second chute track and the furnace body is determined based on the inclination angle of the furnace body (the crucible in the vacuum induction furnace) during steel pouring, ensuring that the improved second chute track does not interfere with the furnace tilting and steel pouring process.

[0030] In specific implementation, the steel pouring station is 200 to 500 mm away from the furnace body, preferably 300 mm away from the furnace body, that is, the second end of the second chute track extends to 300 mm away from the furnace body (the furnace body is the crucible of the vacuum induction furnace).

[0031] During specific implementation: keep the chute track of the chute chamber section (i.e., the first chute track 4) unchanged, take the first chute track 4 as the base point, cut off the track inside the smelting chamber and the track of the furnace body and grate section, and replace the original two sections of track with two rectangular steel bars (i.e., form the second chute track 5), wherein the end of the second chute track 5 close to the chute chamber 1 is horizontally positioned using a spirit level and a laser instrument to ensure that the second chute track 5 is consistent with the first chute track 4; the end close to the furnace body and grate section 3 needs to be shaken for confirmation, and the furnace body 20 is shaken to the maximum angle for steel pouring to ensure that it will not contact the second chute track 5 and to ensure that the chute trolley 19 can move along the second chute track 5 to the correct steel pouring position of 2450mm. The second chute track 5 is secured with channel steel welding. Bearing blocks 16 are welded to the sides of the second chute track 5 in sections. Leveling is performed using a spirit level and laser. A pin and pulley 17 are installed on the bearing blocks 16, ensuring that the pulley 17 can be manually rotated without obstruction. The pulley 17 receives the chute trolley 19 driven by the chain 8. Rectangular steel is used for the second chute track 5, facilitating easy material sourcing and cost savings. Bearing blocks 16 are similarly installed at intervals on the first chute track 4. These bearing blocks are rotatably mounted to the pulleys 17 via pins, which support the chute trolley 19 driven by the chain 8.

[0032] like Figure 2 and Figure 3 As shown, in the prior art, when the chute trolley 19 advances from the chute chamber 1 to the smelting chamber section track, the spacing between the two sections of track (i.e., the first spacing mentioned above) easily causes the chute trolley 19 to bump, and the protective area of ​​the chain guard plate 10 is insufficient, the chain guard plate 10 is easily deformed, and the chain will derail from the gap between the chain guard plate and the chain receiving groove; after the chain derails, the operator cannot know, and continuing to operate the trolley forward will break the chain and the chain guard plate. In the process of pouring steel, a fault must be broken through, and the time for breaking through is long. Each breaking through has a great impact on the composition of the molten steel in the furnace and the furnace lining. Because the chute chamber of the domestic induction furnace is small in size, it is impossible to make changes based on other induction furnaces, so it is necessary to optimize the chute transmission structure to avoid faults.

[0033] Therefore, another improvement of this embodiment is to add a chain protection component, such as Figure 4 and Figure 5As shown, the chain protection assembly includes a chain protection plate 10 and a clamping member; a chain receiving groove 9 with an upper opening is installed on the first chute track 4 on one side of the chute chamber 1, and the chain receiving groove 9 extends along the length direction of the first chute track 4, and a chain 8 driven by a reducer 7 is arranged in the chain receiving groove 9, and the chain protection plate 10 includes a supporting section 11 and a protective section 12, and the first end of the supporting section 11 is welded to the bottom surface of the chain receiving groove 9, and the second end of the supporting section 11 is vertically connected to the first end of the protective section 12, and a second gap 13 is provided between the second end of the protective section 12 and the outer side plate of the chain receiving groove 9 close to the chute trolley 19, and this second gap 13 is used to prevent the chain 8 from falling out of the chain receiving groove 9, and to ensure that the chain 8 is connected to the chute trolley 19 through the mounting plate 18, and the clamping member is used to clamp the protective section 12 in the vertical direction to prevent the protective section 12 from being deformed by force. By increasing the width of the protective plate 10 and thereby reducing the second interval, the chain can be better prevented from derailing without affecting the forward trajectory of the chute trolley; and providing a clamping member further prevents the chain protective plate from being deformed by force and the chain from derailing.

[0034] In practice, the original chain guard plate's top protective area is insufficient. A right-angle steel is used to replace the existing chain guard plate (i.e., the support segment 11 and the guard segment 12 are connected to form the right-angle steel). The width of the guard segment is increased to a specific range: the width from the first end to the second end of the guard segment 12 is 1 / 3 to 1 / 2 of the distance from the support segment 11 to the outer plate of the chain receiving slot 9. In this embodiment, the top protective surface width is increased from 23 mm to 33 mm. This increase in the guard segment width can better prevent chain derailment without affecting the forward trajectory of the chute trolley.

[0035] The plurality of clamping members are welded to the inner wall of the chute chamber at intervals along the length of the first chute track, with the clamping ends of the clamping members vertically abutting the guard section. The provision of multiple clamping members enhances the clamping effect and prevents deformation of the chain guard plate and chain derailment.

[0036] The compression member includes a compression screw 14 and a fixing plate 15. The first end of the fixing plate 15 is fixed to the inner wall of the chute chamber 1, and the compression screw 14 is mounted on the second end of the fixing plate 15. The compression screw 14 vertically abuts the guard section 12. With this arrangement, the compression member applies a downward force to the guard section in the form of a screw jackscrew, preventing the chain guard plate from deforming under stress and preventing the chain from derailing.

[0037] In this embodiment, the number of the fixing plates 15 and the number of the compression screws 14 are both multiple. The fixing plates 15 are installed at intervals along the length of the first chute track 4 on the inner wall of one side of the chute chamber 1. The compression screws 14 are connected to the fixing plates 15 in a one-to-one correspondence. By providing multiple sets of fixing plates 15 and compression screws 14, the compression effect is improved and deformation of the protective section is prevented.

[0038] In another embodiment, there is one fixing plate 15 and multiple pressing screws 14. The fixing plate 15 is provided on one inner wall of the chute chamber 1 along the length of the first chute track 4, and the pressing screws 14 are installed at intervals on the fixing plate 15. By providing multiple pressing screws 14, the pressing effect is improved and deformation of the protective section is prevented.

[0039] The utility model improves the chute track and chain guard plate of the existing vacuum induction furnace. Specifically, the second chute track of the smelting chamber is extended, the chute track of the furnace body and grate section is eliminated, the top width of the chain guard plate is increased, and a tightening screw is added to prevent the chain guard plate from deforming. Through the above measures, the chute trolley can smoothly enter the steel pouring position, effectively avoiding the occurrence of malfunctions during the movement of the chute trolley.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum induction furnace chute transmission protection mechanism, characterized in that: include: The chute track includes a first chute track and a second chute track. The first chute track is arranged on both sides of the chute chamber, and the second chute track is arranged on both sides of the smelting chamber. There is a first gap between the first end of the second chute track and the first chute track. The first gap is used to set the chute chamber isolation valve. The second end of the second chute track extends to the steel pouring station, so that the chute trolley can move along the second chute track to the correct steel pouring position.

2. The vacuum induction furnace chute transmission protection mechanism according to claim 1, characterized in that: The cam is secured to a position 56° to the top of the cam and is secured to a position 152° to the bottom of the cam, and the cam is secured to a position 154° to the top of the cam. The cam is secured to a position 56° to the top of the cam. The cam is secured to a position 152° to the top of the cam.

3. The vacuum induction furnace chute transmission protection mechanism according to claim 2, characterized in that: There are several pressing members, which are installed at intervals on the inner wall of the chute chamber along the length direction of the first chute track, and the pressing ends of the pressing members abut against the protective section along the vertical direction.

4. The vacuum induction furnace chute transmission protection mechanism according to claim 2, characterized in that: The pressing member includes a pressing screw and a fixing plate; the first end of the fixing plate is fixed to the inner wall of the chute chamber, the pressing screw is installed on the second end of the fixing plate, and the pressing screw abuts against the protective section along the vertical direction.

5. The vacuum induction furnace chute transmission protection mechanism according to claim 4, characterized in that: There are several fixing plates and several pressing screws, and several fixing plates are installed at intervals on one side inner wall of the chute chamber along the length direction of the first chute track. Several pressing screws are connected to the fixing plates in a one-to-one correspondence.

6. The vacuum induction furnace chute transmission protection mechanism according to claim 4, characterized in that: The number of the fixing plate is one, the number of the pressing screws is several, the fixing plate is arranged on one side inner wall of the chute chamber along the length direction of the first chute track, and the pressing screws are installed on the fixing plate at intervals.

7. The vacuum induction furnace chute transmission protection mechanism according to claim 2, characterized in that: The width from the first end to the second end of the protection section is 1 / 3 to 1 / 2 of the distance from the support section to the outer side plate of the chain accommodating groove.

8. The vacuum induction furnace chute transmission protection mechanism according to claim 2, characterized in that: The second chute track is made of rectangular steel.

9. The vacuum induction furnace chute transmission protection mechanism according to claim 1, characterized in that: Bearing seats are installed at intervals on the second chute track, and pulleys are rotatably installed on the bearing seats to receive the chute trolley driven by the chain through the pulleys.

10. The vacuum induction furnace chute transmission protection mechanism according to claim 1, characterized in that: Bearing seats are installed at intervals on the first chute track, and pulleys are rotatably installed on the bearing seats to receive the chute trolley driven by the chain through the pulleys.

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