Split water-cooled compensator for metal smelting electric furnace

Abstract

This invention relates to the field of electric furnace technology, specifically to a split-type water-cooled compensator for a metal smelting electric furnace, comprising a compensating tube and a driving mechanism. The axial ends of the compensating tube are a first end and a second end, respectively. A flange assembly is coaxially and detachably connected to the first end. The flange assembly has a mounting hole, the axis of which is parallel to but not coincident with the axis of the compensating tube. A rotating ring is coaxially rotatably disposed within the mounting hole. A connecting flange is provided on the rotating ring, the axis of which is parallel to but not coaxial with the axis of the rotating ring. The connecting flange is used to connect a transformer connecting pipe. The second end is used to connect a short grid electrode conductive pipe. The driving mechanism can drive the rotating ring to rotate within the mounting hole, thereby causing the connecting flange to rotate synchronously around the axis of the mounting hole, thus changing the position of the connecting flange relative to the first end of the compensating tube. This prevents the compensating tube from bending after installation and ensures normal use.

Description

Technical Field

[0001] This invention relates to the field of electric furnace technology, and in particular to a split-type water-cooled compensator for a metal smelting electric furnace. Background Technology

[0002] In the operation of electric furnaces for metal smelting, a water-cooled circulation system is usually used for cooling. The water-cooled circulation system includes a water-cooled compensator, which is used to connect the transformer to the short-circuit conductive copper pipe, thereby reducing vibration and improving the operating stability of the electric furnace.

[0003] For example, patent document CN220339123U discloses a water-cooled compensator for a calcium carbide furnace. One end of the compensator is fixedly connected to the transformer via a plug-in sleeve, and the other end is connected to the short-network conductive copper pipe via a locking ring. However, in use, the transformer and the short-network conductive copper pipe are separately hoisted and fixed as a whole. Due to factors such as hoisting deviation and installation errors, the axes of the two often become misaligned. This causes the water-cooled compensator to bend after installation but before operation, resulting in uneven stress on both ends and uneven sealing, thus affecting the normal use of the water-cooled compensator. Summary of the Invention

[0004] Therefore, it is necessary to provide a split-type water-cooled compensator for metal smelting electric furnaces to address the technical problem that the current transformer and short-network conductive copper pipe are not coaxial, causing the water-cooled compensator to bend after installation and before operation, thus affecting normal use.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A split-type water-cooled compensator for a metal smelting electric furnace includes a compensating tube and a driving mechanism. The compensating tube has a hollow structure to accommodate the cooling medium. The axial ends of the compensating tube are a first end and a second end, respectively. The first end is coaxially and detachably connected to a flange assembly. The flange assembly has a mounting hole, the axis of which is parallel to but not coincident with the axis of the compensating tube. A rotating ring is coaxially rotatably disposed within the mounting hole. A connecting flange is provided on the rotating ring, the axis of which is parallel to but not coaxial with the axis of the rotating ring. The connecting flange is used to connect a transformer connecting pipe. The second end is used to connect a short grid electrode conductive pipe. The driving mechanism can drive the rotating ring to rotate within the mounting hole, thereby causing the connecting flange to rotate synchronously around the axis of the mounting hole, thus changing the position of the connecting flange relative to the first end of the compensating tube.

[0007] Furthermore, the drive mechanism includes a drive shaft and a worm gear, both of which are rotatably mounted on the flange assembly. The axis of the drive shaft is parallel to the axis of the mounting hole, and the worm gear is perpendicular to the drive shaft. One end of the worm gear is in transmission engagement with the drive shaft. An external gear ring is coaxially provided on the outer circumferential surface of the rotating ring, and the external gear ring meshes with the worm gear.

[0008] Furthermore, the drive shaft is provided with a drive hole for inserting a wrench, and the drive hole is a hexagonal hole.

[0009] Furthermore, the compensation tube is conical in shape, and its diameter gradually increases from the first end to the second end.

[0010] Furthermore, the first end of the compensation pipe is provided with a tapered flare, the small end of which is connected to the first end of the compensation pipe, and the large end of which is connected to the flange assembly.

[0011] Furthermore, the flange assembly includes a first flange and a second flange arranged coaxially. The first flange is disposed away from the first end of the compensation pipe relative to the second flange. A first stepped hole is provided on the end face of the first flange facing the second flange, and a second stepped hole is provided on the end face of the second flange facing the first flange. The first stepped hole and the second stepped hole are connected to form a rotating groove. The rotating groove is coaxially located on the inner wall of the mounting hole, and the external gear ring is rotatably disposed in the rotating groove.

[0012] Furthermore, the flange assembly also includes a third flange, which is disposed at the first end of the compensating pipe relative to the second flange; the large end of the tapered flare is coaxially provided with a retaining ring, which is in axial stop fit with the third flange in the compensating pipe; the first flange, the second flange and the third flange are coaxially fixedly connected by bolts.

[0013] Furthermore, a first sealing ring is provided between the outer circumferential surface of the rotating ring and the inner circumferential surface of the second flange. The first sealing ring is a wedge-shaped sealing ring, and the thickness of the wedge-shaped sealing ring gradually decreases from the direction away from the first end of the compensation pipe to the direction closer to the first end of the compensation pipe.

[0014] Furthermore, the rotating ring has an inner hole, the axis of which is parallel to but does not coincide with the axis of the rotating ring. A telescopic cylinder is coaxially provided on the connecting flange, the telescopic cylinder is rotatably disposed in the inner hole, and the telescopic cylinder can slide along the axial direction of the inner hole.

[0015] Furthermore, the compensation tube includes a flexible braided copper wire layer and an insulating layer, the flexible braided copper wire layer enabling the compensation tube to bend, and the insulating layer being located outside the flexible braided copper wire layer.

[0016] The beneficial effects of this invention are:

[0017] The present invention provides a split-type water-cooled compensator for metal smelting electric furnaces. First, the rotating ring is eccentrically set on the flange assembly, and the connecting flange is eccentrically set on the rotating ring. When the transformer connecting pipe and the short grid electrode conductive pipe are not coaxial, the rotating ring is driven by the driving mechanism to rotate, thereby causing the connecting flange to rotate synchronously, thereby changing the position of the connecting flange relative to the first end of the compensating pipe. This can prevent the compensating pipe from bending after installation and before operation, ensuring the normal use of the split-type water-cooled compensator for metal smelting electric furnaces.

[0018] Secondly, since transformers primarily vibrate at high frequencies and low amplitudes, while the short grid electrode side primarily vibrates at low frequencies and high amplitudes, the bending stress caused by this low-frequency, high-amplitude vibration is greater on the compensating tube. Designing the compensating tube as a conical shape with a gradually increasing diameter from the first to the second end helps to keep the bending stress from the short grid electrode side away from the second end as much as possible. Simultaneously, increasing the radius of curvature of the deformation zone when the compensating tube is subjected to vibration reduces stress concentration and the overall degree of bending. Furthermore, since the cooling medium flows from the second to the first end, the conical design results in a lower flow velocity at the second end and a higher flow velocity at the first end, thereby improving the heat exchange efficiency of the cooling medium at the first end and reducing the temperature difference between the two axial ends of the compensating tube.

[0019] Third, the flange assembly and the compensation pipe are set separately, and the compensation pipe can be rotated at a certain angle periodically, which can avoid long-term bending and deformation of local parts of the compensation pipe and extend the service life of the split water-cooled compensator for metal smelting electric furnace. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a split-type water-cooled compensator for a metal smelting electric furnace according to an embodiment of the present invention.

[0021] Figure 2 This is a cross-sectional view of a split-type water-cooled compensator for a metal smelting electric furnace according to an embodiment of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0023] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle;

[0024] Figure 5 This is an exploded schematic diagram of a split-type water-cooled compensator for a metal smelting electric furnace according to an embodiment of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of the structure at point C.

[0026] in:

[0027] 110. Compensating pipe; 111. Insulating layer; 112. First end; 113. Tapered flare; 114. Retaining ring; 115. Second sealing ring; 116. Fourth flange; 117. Fifth flange; 118. Second end; 120. Flange assembly; 121. Third flange; 122. Second flange; 123. First flange; 124. Rotating groove; 125. Perforation; 126. Mounting hole; 130. Rotating ring; 131. Inner hole; 132. External gear ring; 133. Connecting flange; 134. Telescopic cylinder; 135. First sealing ring; 150. Drive mechanism; 151. Worm gear; 152. Passive conical wheel; 153. Active conical wheel; 154. Drive shaft; 155. Hexagonal hole; 200. Transformer connecting pipe; 300. Short grid electrode conductive pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] like Figures 1 to 6As shown in the figure, an embodiment of the present invention provides a split-type water-cooled compensator for a metal smelting electric furnace, including a compensating pipe 110 and a driving mechanism 150. The compensating pipe 110 has a hollow structure for containing the cooling medium. The two axial ends of the compensating pipe 110 are a first end 112 and a second end 118, respectively. The first end 112 is coaxially and detachably connected to a flange assembly 120. The flange assembly 120 is provided with a mounting hole 126. The axis of the mounting hole 126 is parallel to and does not coincide with the axis of the compensating pipe 110. The mounting hole 126 is coaxial with the compensating pipe 110. A rotating ring 130 is rotatably provided, and a connecting flange 133 is provided on the rotating ring 130. The axis of the connecting flange 133 is parallel to but not coaxial with the axis of the rotating ring 130. The connecting flange 133 is used to connect the transformer connecting pipe 200, and the second end 118 is used to connect the short grid electrode conductive pipe 300. The driving mechanism 150 can drive the rotating ring 130 to rotate within the mounting hole 126, thereby causing the connecting flange 133 to rotate synchronously around the axis of the mounting hole 126, thereby changing the position of the connecting flange 133 relative to the first end 112 of the compensation pipe 110.

[0032] Specifically, the cooling medium is cooling water. The second end 118 is coaxially provided with a detachably connected fourth flange 116 and a fifth flange 117, and the fifth flange 117 is coaxially connected to the short mesh electrode conductive tube 300.

[0033] In this way, the rotating ring 130 is eccentrically set on the flange assembly 120, and the connecting flange 133 is eccentrically set on the rotating ring 130. When the transformer connecting pipe 200 and the short grid electrode conductive pipe 300 are not coaxial, the driving mechanism 150 drives the rotating ring 130 to rotate, causing the connecting flange 133 to rotate synchronously, so that the axial trajectory of the connecting flange 133 is circular, thereby changing the position of the connecting flange 133 relative to the first end 112 of the compensation pipe 110. This can prevent the compensation pipe 110 from bending after installation and before operation, ensuring the normal use of the split water-cooled compensator for metal smelting electric furnaces.

[0034] Furthermore, the drive mechanism 150 includes a drive shaft 154 and a worm gear 151, both rotatably mounted on the flange assembly 120. The axis of the drive shaft 154 is parallel to the axis of the mounting hole 126, and the worm gear 151 is perpendicular to the drive shaft 154, with one end of the worm gear 151 engaging with the drive shaft 154. An external gear ring 132 is coaxially mounted on the outer circumferential surface of the rotating ring 130, meshing with the worm gear 151. A driving conical wheel 153 is located at the end of the drive shaft 154, and a driven conical wheel 152 is located at one end of the worm gear 151, with the driving conical wheel 153 meshing with the driven conical wheel 152. Thus, rotating the drive shaft 154 drives the worm gear 151 to rotate, which in turn engages with the external gear ring 132 to rotate the rotating ring 130 within the mounting hole 126. This worm gear mechanism has a simple structure and is easy to install.

[0035] Furthermore, the drive shaft 154 is provided with a drive hole for inserting a wrench; the drive hole is a hexagonal hole 155. This allows the drive shaft 154 to rotate via a wrench, resulting in a simple structure.

[0036] Furthermore, the compensation tube 110 is conical in shape, and the diameter of the compensation tube 110 gradually increases from the first end 112 to the second end 118.

[0037] Since the transformer mainly vibrates at high frequency and low amplitude, while the short grid electrode side mainly vibrates at low frequency and high amplitude, the low frequency and high amplitude vibration causes greater bending stress to the compensating tube 110. The compensating tube 110 is designed as a cone with a gradually increasing diameter from the first end 112 to the second end 118, so that the bending stress caused by the vibration of the short grid electrode side is as far away as possible from the second end 118; at the same time, the radius of curvature of the deformation section of the compensating tube 110 when it is subjected to vibration and bending is increased, thereby reducing stress concentration and reducing the overall bending degree of the compensating tube 110.

[0038] Meanwhile, since the cooling medium flows from the second end 118 to the first end 112, the conical design makes the flow velocity of the cooling medium low at the second end 118 and high at the first end 112, thereby improving the heat exchange efficiency of the cooling medium at the first end 112 and reducing the temperature difference between the two ends of the compensation tube 110 along the axis.

[0039] Furthermore, the first end 112 of the compensation pipe 110 is also provided with a tapered flare 113. The small end of the tapered flare 113 is connected to the first end 112 of the compensation pipe 110, and the large end of the tapered flare 113 is connected to the flange assembly 120. The tapered flare 113 can reduce the flow rate of the cooling medium, avoid impacting the rotating ring 130, and prevent affecting the cooling effect of the cooling medium.

[0040] Furthermore, the flange assembly 120 includes a first flange 123 and a second flange 122 coaxially arranged. The first flange 123 is disposed away from the first end 112 of the compensation pipe 110 relative to the second flange 122. The end face of the first flange 123 facing the second flange 122 is provided with a first stepped hole, and the end face of the second flange 122 facing the first flange 123 is provided with a second stepped hole. The first stepped hole and the second stepped hole are connected to form a rotating groove 124. The rotating groove 124 is coaxially located on the inner wall of the mounting hole 126, and the external gear ring 132 is rotatably disposed in the rotating groove 124.

[0041] The first flange 123 has a through hole 125 through which the drive shaft 154 passes. The first flange 123 and the second flange 122 also have clearance grooves corresponding to the rotation groove 124, in which the worm gear 151 is rotatably disposed. The rotation groove 124 effectively limits the outer gear ring 132 of the rotating ring 130 from both axial ends, preventing the rotating ring 130 from moving axially along the compensating pipe 110 during rotation, ensuring that the outer gear ring 132 always remains engaged with the worm gear 151.

[0042] Furthermore, the flange assembly 120 also includes a third flange 121, which is disposed relative to the second flange 122 near the first end 112 of the compensating pipe 110; the large end of the tapered flare 113 is coaxially provided with a retaining ring 114, which is in axial stop engagement with the third flange 121 in the compensating pipe 110; the first flange 123, the second flange 122 and the third flange 121 are coaxially fixedly connected by bolts.

[0043] The first flange 123 and the second flange 122 are connected to limit the rotation ring 130, and the third flange 121 connects the tapered flared end 113 of the compensation pipe 110 to the rotation ring 130. The retaining ring 114 is provided with a second sealing ring 115 on the side near the first end 112, which is used to seal the tapered flared end 113 with the third flange 121.

[0044] In this way, the flange assembly 120 and the compensating pipe 110 are set separately, and the compensating pipe 110 can be rotated at a certain angle periodically. This can prevent the local part of the compensating pipe 110 from being bent and deformed for a long time and thus extend the service life of the split water-cooled compensator for metal smelting electric furnace.

[0045] Furthermore, a first sealing ring 135 is provided between the outer peripheral surface of the rotating ring 130 and the inner peripheral surface of the second flange 122. The first sealing ring 135 is a wedge-shaped sealing ring, and the thickness of the wedge-shaped sealing ring gradually decreases from the direction away from the first end 112 of the compensation pipe 110 to the direction closer to the first end 112 of the compensation pipe 110.

[0046] When the first flange 123 and the second flange 122 approach each other, the wedge-shaped sealing ring, under pressure, can seal the outer circumferential surface of the rotating ring 130 with the inner circumferential surface of the second flange 122, thus preventing moisture from entering the gap between the rotating ring 130 and the compensating pipe 110.

[0047] Furthermore, the rotating ring 130 has an inner hole 131, the axis of the inner hole 131 is parallel to and does not coincide with the axis of the rotating ring 130, and a telescopic cylinder 134 is coaxially provided on the connecting flange 133. The telescopic cylinder 134 is rotatably disposed in the inner hole 131, and the telescopic cylinder 134 can slide along the axial direction of the inner hole 131.

[0048] Since there is a fixed distance between the transformer connecting pipe 200 and the short grid electrode conductive pipe 300, and this fixed distance is consistent with the overall length of the split water-cooled compensator for the metal smelting electric furnace, when installing the split water-cooled compensator for the metal smelting electric furnace, first retract the telescopic cylinder 134 into the inner hole 131 to reduce the overall length, and then extend the telescopic cylinder 134 to restore the initial length to achieve installation.

[0049] Furthermore, the compensation tube 110 includes a flexible braided copper wire layer and an insulating layer 111. The flexible braided copper wire layer allows the compensation tube 110 to bend, and the insulating layer 111 is located outside the flexible braided copper wire layer. Specifically, the insulating layer 111 can be engaged with the third flange 121 for a stop fit.

[0050] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows:

[0051] Initially, the axis of the connecting flange 133 coincides with the axis of the compensating pipe 110. The tapered flare 113 of the compensating pipe 110 is connected to the rotating ring 130 via the flange assembly 120 and can be detachably installed. Then, the telescopic cylinder 134 of the connecting flange 133 is retracted into the inner hole 131 of the rotating ring 130 to reduce the overall length, and then the telescopic cylinder 134 of the connecting flange 133 is extended out of the inner hole 131 of the rotating ring 130 to restore its initial length. Then, the drive shaft 154 is rotated by a wrench to rotate the rotating ring 130 so that the connecting flange 133 corresponds to the transformer connecting pipe 200. The connecting flange 133 and the transformer connecting pipe 200 are detachably connected by bolts, and the fifth flange 117 on the second end 118 of the compensating pipe 110 is detachably connected to the short grid electrode conductive pipe 300 by bolts.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A split type water cooled compensator for a metal smelting electric furnace, characterized by, include: The compensation tube is a hollow structure used to contain the cooling medium. The axial ends of the compensation tube are a first end and a second end. The first end is coaxially and detachably connected to a flange assembly. The flange assembly has mounting holes, the axis of which is parallel to but not coincident with the axis of the compensation tube. A rotating ring is coaxially rotatably disposed within the mounting hole. A connecting flange is provided on the rotating ring, the axis of which is parallel to but not coaxial with the axis of the rotating ring. The connecting flange is used to connect to a transformer connecting pipe. The second end is used to connect to a short grid electrode conductive pipe. The drive mechanism drives the rotating ring to rotate within the mounting hole, thereby causing the connecting flange to rotate synchronously around the axis of the mounting hole, thus changing the position of the connecting flange relative to the first end of the compensating pipe. The drive mechanism includes a drive shaft and a worm gear, both of which are rotatably mounted on the flange assembly. The axis of the drive shaft is parallel to the axis of the mounting hole, and the worm gear is perpendicular to the drive shaft, with one end of the worm gear engaging with the drive shaft. An external gear ring is coaxially provided on the outer circumferential surface of the rotating ring, and the external gear ring meshes with the worm gear. The compensating tube is conical, and its diameter gradually increases from the first end to the second end. The first end of the compensating tube is also provided with a tapered flare. The small end of the tapered flare is connected to the first end of the compensating tube, and the large end of the tapered flare is connected to the flange assembly. The flange assembly includes a first flange and a second flange arranged coaxially. The first flange is located away from the first end of the compensating tube relative to the second flange. The end face of the first flange facing the second flange is provided with a first stepped hole, and the end face of the second flange facing the first flange is provided with a second stepped hole. The first stepped hole and the second stepped hole are connected to form a rotating groove. The rotating groove is coaxially located on the inner wall of the mounting hole, and the external gear ring is rotatably disposed in the rotating groove.

2. The split water cooled compensator for a metal melting electric furnace according to claim 1, wherein The drive shaft is provided with a drive hole for inserting a wrench, and the drive hole is a hexagonal hole.

3. The split-type water-cooled compensator for metal smelting electric furnaces according to claim 1, characterized in that, The flange assembly also includes a third flange, which is disposed at the first end of the compensating pipe relative to the second flange; the large end of the tapered flare is coaxially provided with a retaining ring, which is in axial stop fit with the third flange in the compensating pipe; the first flange, the second flange and the third flange are coaxially fixedly connected by bolts.

4. The split-type water-cooled compensator for metal smelting electric furnaces according to claim 1, characterized in that, A first sealing ring is provided between the outer circumferential surface of the rotating ring and the inner circumferential surface of the second flange. The first sealing ring is a wedge-shaped sealing ring, and the thickness of the wedge-shaped sealing ring gradually decreases from the direction away from the first end of the compensation pipe to the direction closer to the first end of the compensation pipe.

5. The split-type water-cooled compensator for metal smelting electric furnaces according to claim 1, characterized in that, The rotating ring has an inner hole, the axis of which is parallel to but does not coincide with the axis of the rotating ring. A telescopic cylinder is coaxially provided on the connecting flange. The telescopic cylinder is rotatably disposed in the inner hole and can slide along the axial direction of the inner hole.

6. The split-type water-cooled compensator for metal smelting electric furnaces according to claim 1, characterized in that, The compensation tube includes a flexible braided copper wire layer and an insulating layer. The flexible braided copper wire layer allows the compensation tube to bend, and the insulating layer is located outside the flexible braided copper wire layer.

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