A device for treating blockage of slag discharge port of a rod heating furnace and a method for using the device

Abstract

The present invention discloses a device for treating a blockage in a slag discharge port of a bar heating furnace, comprising a cantilever roller arranged outside the heating furnace, a cantilever roller arranged inside the heating furnace and connected to the cantilever roller, a slag discharge pipe arranged below the cantilever roller, and a slag discharge device arranged below the slag discharge pipe, wherein the slag discharge device comprises a hydraulic cylinder, a push rod and a tray, the piston rod head of the hydraulic cylinder is detachably connected to the lower end of the push rod, the upper end of the push rod is connected to the tray, and the push rod and the tray are placed into the slag discharge pipe from the working opening of the slag discharge pipe. When the hydraulic cylinder is started, the push rod drives the tray to lift up the cantilever roller that falls into the slag discharge port of the slag discharge pipe. The present invention also discloses a method for using the device for treating a blockage in a slag discharge port of a bar heating furnace, wherein the device and the method for using the device enable the cantilever roller to be safely separated from the slag discharge port, restore the smooth slag discharge function of the slag discharge port of the heating furnace, and improve the safety and timeliness of abnormal operations.

Description

Technical Field

[0001] The invention belongs to the field of metallurgical industry and relates to a device for treating the blockage of a slag discharge port of a rod heating furnace and a use method thereof. Background Art

[0002] Most of the rollers used to transport steel billets in the heating furnace for hot-rolled bars are designed as cantilever rollers. Cantilever rollers are furnace transmission equipment. The cantilever roller equipment outside the heating furnace has a low failure rate and is easy to inspect. However, it is difficult for inspectors and operators to find equipment defects in the rollers inside the cantilever roller furnace, and the failure rate is relatively high. According to historical failure data collection, when the cantilever roller bursts, the roller cover falls off, and the cantilever roller is separated from the cantilever roller shaft, the cantilever roller will fall to the bottom of the heating furnace. If the position where the cantilever roller falls is not blocked, The slag discharge port at the bottom of the heating furnace will basically not affect the slag discharge of the heating furnace. However, if the position where the cantilever roller falls off just blocks the slag discharge port at the bottom of the heating furnace, even if the cantilever roller does not completely block the slag discharge port, there is still a certain gap. However, after a period of production, the iron oxide falling off the red-hot steel billet is of different sizes and the cantilever roller slides uncontrollably behind the slag discharge. Eventually, the slag discharge port will be directly blocked due to the falling of the cantilever roller. This fault has a great impact on the heating of the heating furnace and the service life of the heating furnace. To handle this fault, the furnace must be stopped, the cantilever rollers entering and exiting the heating furnace must be removed, and the heating furnace must be cooled by ventilation means such as axial flow fans until the temperature inside the heating furnace can enter. The operator can then remove the cantilever roller from the slag discharge port manually. The cooling time of the heating furnace is at least three days, and three days of shutdown will bring huge losses to the company.

[0003] Precisely because this fault is difficult to spot check, our existing control method is to formulate cantilever roller maintenance standards with a shorter service life, and control this fault by frequently replacing it and frequently checking and repairing it offline. This method has a certain effect, but the frequent replacement of cantilever rollers has seriously restricted the production rhythm, and there is no fundamental solution to the problem of cantilever rollers blocking the slag discharge port. Therefore, it is necessary to find a device and method to solve this problem. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a device for handling the blockage of the slag discharge port of a bar heating furnace and a method for using the device. The cantilever roller is lifted up and separated from the slag discharge port by the push rod and the tray installed on the piston rod head of the hydraulic oil cylinder, so as to restore the smooth slag discharge function of the slag discharge port of the heating furnace. When the cantilever roller falls off and blocks the slag discharge port, there is no need to stop the furnace for three days to cool the heating furnace and manually remove the cantilever roller. Only 2-3 hours of downtime for daily specification conversion can be used to handle this fault using the device for handling the blockage of the slag discharge port of the bar heating furnace, which not only reduces the maintenance cost and production cost, but also effectively improves the safety and timeliness of abnormal operations.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A device for treating a blockage in a slag discharge port of a rod heating furnace, comprising a cantilever roller disposed outside the heating furnace, a cantilever roller disposed inside the heating furnace and connected to the cantilever roller, a slag discharge pipe disposed below the cantilever roller, and a slag discharge device disposed below the slag discharge pipe, wherein the slag discharge device comprises a hydraulic cylinder, a push rod and a tray, wherein the piston rod head of the hydraulic cylinder is detachably connected to the lower end of the push rod, the upper end of the push rod is connected to the tray, and the push rod and the tray are inserted into the slag discharge pipe from the operating opening of the slag discharge pipe. In the above-mentioned device for treating a blockage in a slag discharge port of a rod heating furnace, the push rod and the tray are inserted into the slag discharge pipe from the operating opening of the slag discharge pipe, the hydraulic cylinder is started, and the push rod drives the tray to lift up the cantilever roller at the slag discharge port of the slag discharge pipe. This device makes it possible to avoid the need to plan a maintenance stop of more than three days to cool the heating furnace when the cantilever roller falls off and blocks the slag discharge port of the heating furnace, and the operating personnel do not need to enter the heating furnace. The fault can be handled by using the device for blocking the slag discharge port of the bar heating furnace during the daily 2-3 hours of downtime for specification change. This not only reduces maintenance and production costs, but also effectively improves the safety and timeliness of abnormal operations.

[0007] In one of the embodiments, the cantilever roller is fixed in contact with the oxidized iron scale around the slag discharge port, the hydraulic cylinder maintains pressure, the push rod is sealed and fixed to the working port, and the piston rod head is separated from the push rod.

[0008] This arrangement enables the pallet to stably lift the cantilever roller and fix the cantilever roller in the pallet, so that the cantilever roller can be safely separated from the slag discharge port, restoring the smooth slag discharge function of the heating furnace slag discharge port, and improving the safety and timeliness of abnormal operations.

[0009] In one embodiment, the center point of the piston rod head coincides with the center point of the slag discharge port, and the tray is provided with anti-skid teeth. This arrangement enables the tray to stably lift the cantilever roller, so that the cantilever roller is safely separated from the slag discharge port, restoring the smooth slag discharge function of the heating furnace slag discharge port, and improving the safety and timeliness of abnormal operations.

[0010] In one embodiment, the tray includes a first support plate and a second support plate, the first support plate is vertically connected to the push rod, and the second support plate is obliquely connected to the first support plate to form a support opening for lifting the cantilever roller. In this setting, the cantilever roller falls into the support opening of the tray, and the support opening of the tray can firmly lift the cantilever roller, so that the cantilever roller is safely separated from the slag discharge port, and the smooth slag discharge function of the heating furnace slag discharge port is restored, thereby improving the safety and timeliness of abnormal operations.

[0011] In one embodiment, the first support plate is provided with a first anti-skid tooth, the second support plate is provided with a second anti-skid tooth, and the first anti-skid tooth and the second anti-skid tooth are arranged opposite to each other. The anti-skid teeth provided on the support plate can increase the surface of the support plate in close contact with the cantilever roller, making it easier to install and more stable to lift and fix the cantilever roller that has fallen off the slag discharge pipe, preventing the cantilever roller from falling off the support plate, and improving the safety and timeliness of abnormal operations.

[0012] In one embodiment, the angle between the first support plate and the second support plate is greater than 90° and less than 360°. In this configuration, the angle of the tray can increase the surface of the tray in close contact with the cantilever roller, making it easier to install and more stable to lift and fix the cantilever roller that has fallen off the slag discharge pipe, preventing the cantilever roller from falling off the tray, and improving the safety and timeliness of abnormal operations.

[0013] In one embodiment, the push rod and the tray are both made of high temperature resistant stainless steel, the first support plate and the second support plate are both semicircular support plates, and the diameter of the semicircular support plate is ≤ 2 / 5 of the diameter of the slag discharge port.

[0014] The high temperature resistant stainless steel tray and part of the ejector rod need to be fixed in the high temperature heating furnace for a long time after they are in close contact with the detached cantilever roller. This can effectively ensure the service life of the tray and the ejector rod, and the size of the tray will not hinder the slag discharge of the heating furnace slag discharge pipe.

[0015] In one embodiment, the fixed end of the hydraulic cylinder is connected to the hydraulic cylinder base, the hydraulic cylinder base is connected to the transverse movement device, the transverse movement device includes a pair of guide rails and a plurality of pulleys, the pulleys are arranged in the pair of guide rails and are respectively connected to the hydraulic cylinder base. This arrangement enables the hydraulic cylinder to quickly move to the corresponding slag discharge port directly below through the transverse movement device to realize the slag discharge operation.

[0016] In one embodiment, the guide rails are respectively provided with a plurality of pulley mounting openings and positioning holes, and the positioning pins are inserted into the positioning holes to fix the hydraulic cylinder base. The positioning pins facilitate the positioning and fixing of the hydraulic cylinder base, and the pulley mounting openings facilitate the rapid removal of the offline repair from the pulley mounting openings when the traverse device fails, without the need to heat the bottom for equipment maintenance.

[0017] A method for treating a slag discharge port blockage in a bar heating furnace. When a cantilever roller abnormally falls off from the cantilever roller and falls off the slag discharge port in the heating furnace, the method for treating a slag discharge port blockage in the bar heating furnace comprises the following steps:

[0018] Step 1: The operator uses a cutting gun to cut an operating opening vertically directly below the slag discharge pipe of the corresponding slag discharge port, and then moves the hydraulic cylinder to the corresponding slag discharge port directly below the slag discharge port through the transverse movement device;

[0019] Step 2: Insert the positioning pin into the positioning hole to fix the hydraulic cylinder base, so that the hydraulic cylinder is positioned, the lower end of the push rod is connected to the piston rod head of the hydraulic cylinder through the connecting plate, the upper end of the push rod is connected to the tray, and the push rod and the tray are inserted into the slag discharge pipe from the working port;

[0020] Step 3: Start the hydraulic cylinder, and the piston rod head of the hydraulic cylinder drives the push rod to extend, and the tray above the push rod contacts the cantilever roller until the cantilever roller is moved away from the slag discharge port, and the cantilever roller contacts and fixes with the oxidized iron scale around the slag discharge port at the bottom of the heating furnace;

[0021] Step 4: Maintain the pressure of the hydraulic system of the hydraulic cylinder, use electric welding to weld and fix the push rod to the edge of the working port, position the supporting cantilever roller, seal the working port, separate the push rod from the piston rod head of the hydraulic cylinder, and complete the operation.

[0022] The above method avoids the need to stop production for more than 3 days for manual entry into the heating furnace to handle the fault when the cantilever roller blocks the slag discharge port of the heating furnace, thereby reducing maintenance costs and production costs and improving the safety and timeliness of abnormal operations.

[0023] The beneficial effects of the present invention are:

[0024] A device and a method for treating the blockage of a slag discharge port of a bar heating furnace. When a hydraulic cylinder is started, a push rod drives a tray to lift up a cantilever roller that falls from the slag discharge port into a slag discharge pipe.

[0025] The device and its use method make it possible for when the cantilever roller falls off and blocks the slag discharge port of the heating furnace, there is no need to plan to stop production for more than three days for maintenance to cool the heating furnace, and the operating personnel do not need to enter the heating furnace. The fault can be handled by using the device for blocking the slag discharge port of the bar heating furnace during the daily 2-3 hours of downtime for specification change, which not only reduces maintenance costs and production costs, but also effectively improves the safety and timeliness of abnormal operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural front view of a device for treating blockage of a slag discharge port of a rod heating furnace according to the present invention;

[0027] Figure 2 It is a structural side view of a device for treating blockage of a slag discharge port of a rod heating furnace according to the present invention;

[0028] Figure 3 This is a front view of the connecting structure of the mandrel and the tray of a device for treating the blockage of the slag discharge port of a bar heating furnace according to the present invention;

[0029] Figure 4 It is a side view of the connecting structure of the mandrel and the tray of a device for treating the blockage of the slag discharge port of a bar heating furnace according to the present invention;

[0030] Figure 5 This is an enlarged view of the structure of a transverse moving device of a device for treating blockage of a slag discharge port of a bar heating furnace according to the present invention;

[0031] Figure 6 for Figure 1 A partial enlarged view of

[0032] Among them: 10-steel billet; 20-stepping beam; 30-cantilever roller; 40-cantilever roller; 50-slag discharge pipe; 60-slag discharge device; 61-hydraulic cylinder; 611-piston rod head; 62-top rod; 63-tray; 631-first support plate; 632-second support plate; 633-first anti-skid tooth; 634-second anti-skid tooth; 70-slag discharge port; 80-operating port; 90-oxidized iron sheet; 100-connecting plate; 101-screw; 110-hydraulic cylinder fixing plate; 120-hydraulic cylinder base; 130-guide rail; 140-pulley; 150-pulley installation port; 160-locating pin; 170-slag flushing groove. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the drawings in the specification. It should be noted that, under the premise of no conflict, the various technical features described below can be arbitrarily combined to form a new embodiment.

[0034] Embodiment 1: A device for treating a slag discharge port blockage in a rod heating furnace, comprising a cantilever roller 30 disposed outside the heating furnace, a cantilever roller 40 disposed inside the heating furnace and connected to the cantilever roller 30, a slag discharge pipe 50 disposed below the cantilever roller 40, and a slag discharge device 60 disposed below the slag discharge pipe 50, wherein a slag discharge port 70 is disposed at the upper end of the slag discharge pipe 50, and an operating port 80 is disposed vertically directly below the slag discharge port 70 corresponding to the slag discharge port 70, and the slag discharge device 60 comprises a liquid The hydraulic cylinder 61, the push rod 62 and the pallet 63, the piston rod head 611 of the hydraulic cylinder 61 is detachably connected to the lower end of the push rod 62, the upper end of the push rod 62 is connected to the pallet 63, the push rod 62 and the pallet 63 penetrate into the slag discharge pipe 50 from the working port 80 of the slag discharge pipe 50, the hydraulic cylinder 61 is started, the push rod 62 drives the pallet 63 to lift the cantilever roller 40 at the slag discharge port 70 or dropped from the slag discharge port 70 into the slag discharge pipe 50, and seals the working port 80.

[0035] In Example 1, a device for treating a blockage in a slag discharge port of a rod heating furnace is provided, wherein a hydraulic cylinder 61 is used to drive a push rod 62, and the push rod 62 is extended from an operating port 80 into the blocked portion of the slag discharge port 70. The piston rod head 611 of the hydraulic cylinder 61 is connected to the push rod 62 and extends out, so that the tray 63 pushes open the blockage in the slag discharge port 70 of the heating furnace to achieve a clearing effect.

[0036] Embodiment 2, on the basis of Embodiment 1, the cantilever roller 40 is fixed in contact with the oxidized iron scale 90 around the slag discharge port 70, the hydraulic cylinder 61 is started, the push rod 62 drives the tray 63 to lift the cantilever roller 40 at the slag discharge port 70 or dropped from the slag discharge port 70 into the slag discharge pipe 50, the cantilever roller 40 is fixed in contact with the oxidized iron scale 90 around the slag discharge port 70, the hydraulic cylinder 61 maintains pressure, the push rod 62 is welded and fixed to the edge of the working port 80, thereby sealing the working port 80, and the piston rod head 611 is disassembled and separated from the push rod 62.

[0037] In Example 2, a device for handling the blockage of the slag discharge port of a rod heating furnace is provided, in which a hydraulic cylinder 61 is used to drive a push rod 62, and the push rod 62 is extended from an operating port 80 into the blocked portion of the slag discharge port 70. The piston rod head 611 of the hydraulic cylinder 61 is connected to the push rod 62 and extends out, so that the tray 63 firmly lifts up the cantilever roller 40 and fixes the cantilever roller 40 in the tray 63, so that the cantilever roller 40 is safely separated from the slag discharge port 70, and the smooth slag discharge function of the slag discharge port 70 of the heating furnace is restored, thereby improving the safety and timeliness of abnormal operations.

[0038] In Embodiment 1 and Embodiment 2, preferably, a connecting plate 100 is provided at the lower end of the push rod 62 , and the push rod 62 is detachably connected to the piston rod head 611 of the hydraulic cylinder 61 via the connecting plate 100 .

[0039] Preferably, the upper part of the connecting plate 100 is provided with a groove and a first connecting hole passing through the groove, the lower part of the connecting plate 100 is provided with a threaded hole and a second connecting hole passing through the threaded hole, the lower end of the push rod 62 is provided with a third connecting hole, the upper end of the piston rod head 611 is provided with an external thread and a fourth connecting hole, the lower end of the push rod 62 is inserted into the groove, the first connecting hole and the third connecting hole are aligned, the push rod 62 is fixed to the connecting plate 100 by the screw 101, the external thread at the upper end of the piston rod head 611 is connected to the threaded hole at the lower part of the connecting plate 100, the second connecting hole and the fourth connecting hole are aligned, and the piston rod head 611 is fixed to the connecting plate 100 by the screw 101.

[0040] This arrangement can rotatably adjust the contact angle between the tray 63 and the cantilever roller 40 , while achieving the separation of the push rod 62 from the piston rod head 611 , and finally achieving the separation of the push rod 62 from the hydraulic cylinder 61 .

[0041] In the embodiment 1 and the embodiment 2, preferably, the center point of the piston rod head 611 of the hydraulic oil cylinder 61 coincides with the center point of the slag discharge port 70. This arrangement makes it unnecessary to calibrate the coincidence point of the piston rod head 611 and the slag discharge port 70 again when the slag discharge port 70 is blocked.

[0042] In Embodiment 1 and Embodiment 2, preferably, the tray 63 is provided with anti-slip teeth. This arrangement enables the tray 63 to stably lift the cantilever roller 40, so that the cantilever roller 40 is safely separated from the slag discharge port 70, and the smooth slag discharge function of the heating furnace slag discharge port 70 is restored, thereby improving the safety and timeliness of abnormal operations.

[0043] In Embodiment 1 and Embodiment 2, preferably, the tray 63 includes a first support plate 631 and a second support plate 632, the first support plate 631 is vertically connected to the top rod 62, and the second support plate 632 is obliquely connected to the first support plate 631 to form a support opening for lifting the cantilever roller 40. This arrangement enables the tray 63 to firmly lift the cantilever roller 40, so that the cantilever roller 40 is safely separated from the slag discharge port 70, and the smooth slag discharge function of the heating furnace slag discharge port 70 is restored, thereby improving the safety and timeliness of abnormal operations.

[0044] In Embodiment 1 and Embodiment 2, preferably, the first support plate 631 is provided with a first anti-skid tooth 633, the second tray 63 is provided with a second anti-skid tooth 634, and the first anti-skid tooth 633 and the second anti-skid tooth 634 are arranged opposite to each other. The tray 63 is provided with anti-skid teeth to increase the surface of the tray 63 in close contact with the cantilever roller 40, making it easier to install and more stable to lift and fix the cantilever roller 40 that has fallen off the slag discharge pipe 50, preventing the cantilever roller 40 from falling off the tray 63; and improving the safety and timeliness of abnormal operations.

[0045] In Embodiment 1 and Embodiment 2, preferably, the angle between the first support plate 631 and the second support plate 632 is greater than 90° and less than 360°. The angle of the tray 63 can increase the surface of the tray 63 in close contact with the cantilever roller 40, making it easier to install and more stable to lift and fix the cantilever roller 40 that has fallen off the slag discharge pipe 50, preventing the cantilever roller 40 from falling off the tray 63, and improving the safety and timeliness of abnormal operations.

[0046] In Example 1 and Example 2, preferably, the top rod 62 and the tray 63 are both made of high-temperature resistant stainless steel 310s, and the first tray 631 and the second tray 632 are both semicircular trays with the arc edges facing outwards, and the diameter of the semicircular tray is ≤ 2 / 5 of the diameter of the slag discharge port 70.

[0047] The high temperature resistant stainless steel tray 63 and part of the top rod 62 need to be fixed in the high temperature heating furnace for a long time after being in close contact with the detached cantilever roller 40, which can effectively ensure the service life of the tray 63 and the top rod 62 and the size of the tray 63 will not hinder the slag discharge of the heating furnace slag discharge pipe 50.

[0048] In Embodiment 1 and Embodiment 2, preferably, the fixed end of the hydraulic cylinder 61 is connected to the hydraulic cylinder base 120 through the hydraulic cylinder fixing plate 110, and the hydraulic cylinder base 120 is connected to the transverse movement device, which includes a pair of guide rails 130 and a plurality of pulleys 140. The pair of guide rails 130 is arranged vertically directly below the slag discharge port 70 of the heating furnace, and the pulleys 140 are evenly arranged in the pair of guide rails 130 and are respectively connected to the hydraulic cylinder base 120 through transition plates. This arrangement enables the hydraulic cylinder 61 to quickly move to the corresponding slag discharge port 70 directly below through the transverse movement device to realize the slag discharge operation.

[0049] In Embodiment 1 and Embodiment 2, preferably, the guide rail 130 is fixedly connected to the cement arch foundation of the heating furnace bottom. By adopting the above technical solution, the installation efficiency of the guide rail 130 is improved, and the stability of the guide rail 130 is also ensured.

[0050] In Embodiment 1 and Embodiment 2, preferably, a pair of guide rails 130 are respectively provided with a plurality of pulley mounting openings 150 and positioning holes, and a detachable positioning pin 160 is inserted into the positioning hole to position and fix the hydraulic cylinder base 120. The positioning pin 160 facilitates the positioning and fixing of the hydraulic cylinder base 120, ensuring that the stability of the traverse device can be quickly and effectively fixed when the traverse device moves to the operating point. The pulley mounting opening 150 facilitates the rapid removal of the traverse device from the pulley mounting opening 150 for offline repair when a traverse device fails, without the need to heat the bottom for equipment maintenance.

[0051] In Embodiment 1 and Embodiment 2, preferably, a slag flushing groove 170 is provided at the slag outlet of the slag discharge pipe 50. This arrangement facilitates the collection of slag.

[0052] A method for treating a slag discharge port blockage in a bar heating furnace. When a cantilever roller 40 abnormally falls off from a cantilever roller 30 at a slag discharge port 70 in a heating furnace, the method for treating a slag discharge port blockage in a bar heating furnace comprises the following steps:

[0053] Step 1: An operator uses a cutting gun to cut an operating opening 80 vertically directly below the slag discharge pipe 50 corresponding to the slag discharge opening 70, and then moves the hydraulic cylinder 61 to directly below the corresponding slag discharge opening 70 through a transverse moving device;

[0054] Step 2: Insert the positioning pin 160 into the positioning hole to fix the hydraulic cylinder base 120, so as to position the hydraulic cylinder 61, connect the lower end of the push rod 62 to the piston rod head 611 of the hydraulic cylinder 61 through the connecting plate 100, connect the upper end of the push rod 62 to the tray 63, and insert the push rod 62 and the tray 63 into the slag discharge pipe 50 from the working port 80;

[0055] Step 3: Start the hydraulic cylinder 61, and the piston rod head 611 of the hydraulic cylinder 61 drives the push rod 62 to extend, and the tray 63 above the push rod 62 contacts the cantilever roller 40 until the cantilever roller 40 is moved away from the slag discharge port 70, and the cantilever roller 40 contacts and fixes with the oxidized iron scale 90 around the slag discharge port 70 at the bottom of the heating furnace;

[0056] Step 4: Maintain the hydraulic system pressure of the hydraulic cylinder 61, use electric welding to weld the push rod 62 to the edge of the working port 80, position the supporting cantilever roller 40, then seal the working port 80, separate the push rod 62 from the piston rod head 611 of the hydraulic cylinder 61, and complete the operation.

[0057] The above method avoids the need to stop production for more than 3 days for manual entry into the heating furnace to handle the fault when the cantilever roller 40 blocks the slag discharge port 70 of the heating furnace, thereby reducing maintenance costs and production costs and improving the safety and timeliness of abnormal operations.

[0058] The technical features in the claims and / or the specification of the present invention may be combined, and the combination is not limited to the combination obtained by reference in the claims. The technical solution obtained by combining the technical features in the claims and / or the specification is also within the protection scope of the present invention.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A device for treating the blockage of the slag discharge port of a bar heating furnace, characterized in that: The invention comprises a cantilever roller (30) arranged outside the heating furnace, a cantilever roller (40) arranged inside the heating furnace and connected to the cantilever roller (30), a slag discharge pipe (50) arranged below the cantilever roller (40), and a slag discharge device (60) arranged below the slag discharge pipe (50), wherein the slag discharge device (60) comprises a hydraulic cylinder (61), a push rod (62) and a tray (63), wherein the piston rod head (611) of the hydraulic cylinder (61) is detachably connected to the lower end of the push rod (62), the upper end of the push rod (62) is connected to the tray (63), and the push rod (62) and the tray (63) are placed into the slag discharge pipe (50) from an operating opening (80) of the slag discharge pipe (50); The cantilever roller (40) is fixedly contacted with the iron oxide scale (90) around the slag discharge port (70), the hydraulic cylinder (61) is started, the push rod (62) drives the tray (63) to lift the cantilever roller (40) at the slag discharge port (70) or dropped from the slag discharge port (70) into the slag discharge pipe (50), the cantilever roller (40) is fixedly contacted with the iron oxide scale (90) around the slag discharge port (70), the hydraulic cylinder (61) maintains pressure, the push rod (62) is fixedly welded to the edge of the working port (80), thereby sealing the working port (80), and the piston rod head (611) and the push rod (62) are disassembled and separated; The center point of the piston rod head (611) coincides with the center point of the slag discharge port (70), and the tray (63) is provided with anti-slip teeth; The tray (63) comprises a first support plate (631) and a second support plate (632), the first support plate (631) being vertically connected to the push rod (62), and the second support plate (632) being obliquely connected to the first support plate (631) to form a support opening for lifting the cantilever roller (40); The fixed end of the hydraulic cylinder (61) is connected to a hydraulic cylinder base (120), and the hydraulic cylinder base (120) is connected to a transverse movement device. The transverse movement device comprises a pair of guide rails (130) and a plurality of pulleys (140). The pulleys (140) are evenly arranged in the pair of guide rails (130) and are respectively connected to the hydraulic cylinder base (120).

2. The device for treating blockage of slag discharge port of a rod heating furnace according to claim 1, characterized in that: The first support plate (631) is provided with first anti-slip teeth (633), and the second support plate (632) is provided with second anti-slip teeth (634), and the first anti-slip teeth (633) and the second anti-slip teeth (634) are arranged facing each other.

3. The device for treating blockage of slag discharge port of a rod heating furnace according to claim 1, characterized in that: The angle between the first supporting plate (631) and the second supporting plate (632) is greater than 90° and less than 360°.

4. The device for treating blockage of slag discharge port of a rod heating furnace according to claim 1, characterized in that: The push rod (62) and the tray (63) are both made of high-temperature resistant stainless steel; the first support plate (631) and the second support plate (632) are both semicircular support plates; and the diameter of the semicircular support plates is ≤ 2 / 5 of the diameter of the slag discharge port (70).

5. The device for treating blockage of slag discharge port of a rod heating furnace according to claim 1, characterized in that: The guide rail (130) is respectively provided with a plurality of pulley mounting openings (150) and positioning holes, and the positioning pins (160) are inserted into the positioning holes to fix the hydraulic cylinder base (120).

6. A method for using a device for treating a slag discharge port blockage in a rod heating furnace, which refers to the device for treating a slag discharge port blockage in a rod heating furnace as claimed in claim 1, characterized in that: When the cantilever roller (40) abnormally falls off from the cantilever roller (30) to the slag discharge port (70) in the heating furnace, the method for treating the blockage of the slag discharge port (70) of the bar heating furnace comprises the following steps: Step 1: An operator uses a cutting gun to cut an operating opening (80) vertically directly below the slag discharge pipe (50) corresponding to the slag discharge opening (70), and then moves the hydraulic cylinder (61) to directly below the corresponding slag discharge opening (70) through a transverse movement device; Step 2: inserting the positioning pin (160) into the positioning hole to fix the hydraulic cylinder base (120), thereby positioning the hydraulic cylinder (61), connecting the lower end of the push rod (62) to the piston rod head (611) of the hydraulic cylinder (61) via the connecting plate (100), connecting the upper end of the push rod (62) to the tray (63), and inserting the push rod (62) and the tray (63) into the slag discharge pipe (50) from the working opening (80); Step 3: Start the hydraulic cylinder (61), and the piston rod head (611) of the hydraulic cylinder (61) drives the push rod (62) to extend, and the tray (63) above the push rod (62) contacts the cantilever roller (40) until the cantilever roller (40) is moved away from the slag discharge port (70), and the cantilever roller (40) contacts and fixes with the iron oxide scale (90) around the slag discharge port (70) at the bottom of the heating furnace; Step 4: The hydraulic system of the hydraulic cylinder (61) is pressurized, and the push rod (62) is welded and fixed to the edge of the working opening (80) using electric welding, the supporting cantilever roller (40) is positioned, and then the working opening (80) is sealed, and the push rod (62) is separated from the piston rod head (611) of the hydraulic cylinder (61), and the operation is completed.

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