Broken rod alarm mechanism for roller rod of roller bed furnace

Abstract

The utility model relates to the technical field of roller way furnaces, in particular to a roller way furnace roller rod breakage alarm mechanism which comprises a fixed conductive part, a detection rod, a roller sleeve and a coupling shaft, the fixed conductive part is connected with a detection device through a wire, the detection rod is connected with the roller sleeve through the coupling shaft, and the roller sleeve is connected to the tail of a roller rod and synchronously rotates along with the roller rod. And the coupling shaft is connected to a detection device through a conducting ring wire. When the roller is in a normal operation state and the fixed conductive part is in regular contact with the detection rod, the detection device, the fixed conductive part and the detection rod are connected in series and electrically communicated to form a detection loop, an electric signal which fluctuates regularly is generated, if the roller is broken, the electric signal in the detection loop is abnormal, and an alarm can be given in time. Through the detection loop of the structure, the working state of the roller rod is converted into an electric signal, the broken rod can be automatically identified, the specific position of the broken rod can be quickly found and positioned when the roller rod is broken, the equipment diagnosis efficiency is improved, and the workload of equipment maintenance personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of roller furnaces, in particular to a roller bar break alarm mechanism for a roller furnace. Background Art

[0002] Roller (sintering) furnaces are mainly used for high-temperature heat treatment and are widely used in the production processes of ceramics, metallurgy, glass, batteries and magnetic materials.

[0003] Inside the roller furnace, several parallel rollers rotate synchronously in the same direction to convey the products. Although the materials used for the rollers are getting better and better, and the indicators of hardness and toughness are getting higher and higher, roller breakage still occurs from time to time. If the roller breaks during the operation of the equipment and cannot be discovered and eliminated in time, the products are likely to get stuck and accumulate at the break, resulting in product scrapping and accident losses.

[0004] In the prior art, the conventional detection method is manual inspection. However, when the roller furnace is in operation, the internal high temperature environment makes it inconvenient to inspect, and the product transmission blocks the rollers at the bottom, affecting the inspection. Stopping the machine for inspection will affect the production progress, and the inspection effect is greatly affected by the inspector's experience, skills, degree of attention and other factors. Therefore, manual inspection is inconvenient and has low reliability.

[0005] Compared with manual inspections, online monitoring using automatic detection devices such as infrared photoelectric or gratings has a high degree of automation, improved reliability and detection effects. However, the high-temperature seal inside the roller furnace easily produces pollutants, which interfere with the photoelectric equipment and affect the detection accuracy. During photoelectric detection, light is transmitted from the transmitting end to the reflecting end, and it can only be known that a roller rod in the furnace is broken, but the specific location of the broken rod cannot be distinguished. The reliability of detection still has room for improvement.

[0006] Based on the problems in the prior art, the utility model provides a roller furnace roller bar breakage alarm mechanism. Utility Model Content

[0007] The utility model aims to provide a roller furnace roller broken rod alarm mechanism to solve the technical problem that the broken rod detection method in the prior art is difficult to quickly and accurately locate the specific position of the broken rod.

[0008] The technical solution of the utility model is: a roller furnace roller bar break alarm mechanism, comprising:

[0009] The roller sleeve is located in the roller furnace and is mounted on the rod body at the tail of the roller rod;

[0010] The coupling is fixedly connected to the roller sleeve, the tail of the coupling extends outside the roller furnace, and the coupling shaft is fixedly connected to the outer wall of the furnace shell through a plate seat;

[0011] The detection rod is fixedly installed at the tail of the coupling and rotates synchronously with the roller bar.

[0012] The conductive ring is in contact connection with the detection rod, and the conductive ring is connected to the detection device through a wire.

[0013] The fixed conductive part is erected at the tail of the roller bar, and the fixed conductive part is connected to the detection device through a wire.

[0014] When the roller bar is in normal operation and the fixed conductive part regularly contacts the detection rod, the detection device, the fixed conductive part and the detection rod are connected in series and electrically connected to form a detection circuit.

[0015] Preferably, the outermost track line of the rotation track of the detection rod encloses a track space, and the fixed conductive part interferes with and contacts the track space.

[0016] Among them, the fixed conductive part includes a detection shaft and a flexible conductive part. The detection shaft is fixedly installed through an insulating bracket. The fixed end of the flexible conductive part is fixedly connected to the detection shaft, and the free end of the flexible conductive part can rebound and reset to the original position after interfering with and contacting the track space.

[0017] Preferably, the detection rod is configured as a single-rod structure. The single rod is fixedly installed at the tail of the coupling through a conductive connecting piece. During the rotation of the roller bar, the single rod regularly contacts the fixed conductive part.

[0018] Preferably, the detection rod is configured as a double-rod structure. The two double rods on both sides are connected by an intermediate connecting plate. The connecting plate is fixed on the coupling, and at least one of the double rods regularly contacts the flexible conductive part.

[0019] Preferably, when the roller bar is in normal operation, the detection circuit generates an electrically-signal with regular fluctuations. When the roller bar is in a broken state, the fixed conductive part and the detection rod are always in contact or never in contact, and the electrical signal is single and unchanged, which is regarded as abnormal and an alarm is given.

[0020] Preferably, the conductive ring and the fixed conductive part are connected to the same channel connection port of the detection device through wires.

[0021] Compared with the prior art, the advantages of the present utility model are:

[0022] (1) The present utility model forms a separate broken-rod alarm mechanism for each roller bar of the roller hearth furnace. The broken-rod alarm mechanism includes a fixed conductive part, a detection rod, a roller sleeve and a coupling that are connected to the detection device through wires. The detection rod is connected to the roller sleeve through the coupling. The roller sleeve is connected to the tail of the roller bar and rotates synchronously with the roller bar. The coupling is connected to the detection device through a conductive ring wire. When the roller bar is in normal operation and the fixed conductive part regularly contacts the detection rod, the detection device, the fixed conductive part and the detection rod are connected in series and electrically connected to form a detection circuit, generating an electrically-signal with regular fluctuations. If the roller bar breaks, the electrical signal in the detection circuit is abnormal and an alarm is given in time.

[0023] It can automatically identify broken rollers. Each roller corresponds to a channel of the detection device, which is convenient for quickly finding and rapidly positioning the specific location of the broken roller when a roller breaks, improving the equipment diagnosis efficiency.

[0024] (2) Through the constructed detection circuit, the working state of the roller is converted into an electrical signal, which is convenient for observation, and can give an alarm in time and quickly lock the specific position of the broken roller when a broken roller occurs, reducing the workload of equipment maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0026] Figure 1 It is a schematic diagram of the installation of an alarm mechanism at the tail of the driven side of the roller of the present utility model;

[0027] Figure 2 It is an overall schematic diagram of the alarm mechanism matched with each roller in the roller hearth furnace of the present utility model;

[0028] Figure 3 It is a schematic diagram corresponding to the alarm mechanism in the first embodiment of the detection rod provided by the present utility model;

[0029] Figure 4 It is a schematic diagram corresponding to the alarm mechanism in the second embodiment of the detection rod provided by the present utility model;

[0030] Wherein: 1, roller sleeve; 2, coupling; 3, detection rod; 4, fixed conductive member; 5, conductive ring; 6, roller; 7, detection device; 8, plate seat; 9, furnace shell; 10, insulating bracket; 11, conductive connecting member; 12, backing plate; 30, connecting plate; 41, detection shaft; 42, flexible conductive member; 301, single rod; 302, double rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The content of the present utility model will be further described in detail below in conjunction with specific embodiments:

[0032] For the convenience of understanding, first, the application scenario of the present application is described. Inside the roller hearth furnace, the products are conveyed through the synchronous and co-rotating of a number of rollers 6 in parallel. Referring to the attached Figure 1 drawings, if a roller breaks during the operation of the equipment and cannot be discovered and eliminated in time, the products are likely to get stuck and accumulate at the breakage, resulting in product scrapping and accident losses.

[0033] The roller rod 6 is horizontally installed with erection installations at both ends. Usually, the roller rod breaks from the middle position. In the broken state, the rod body near the middle of the rod rotates downward, while the two ends rotate upward and tilt. Therefore, in the present utility model, an alarm mechanism is provided at the tail of each roller rod. When the roller rod breaks, the alarm mechanism is triggered to form a conductive circuit inside for alarming, automatically identifying the broken rod, so as to quickly lock the position of the broken rod and improve the diagnosis efficiency of the broken rod.

[0034] As Figure 1 shown, a broken rod alarm mechanism for the roller rod of a roller hearth furnace includes a roller sleeve 1, a coupling 2, a detection rod 3 and a fixed conductive part 4. The roller sleeve 1 is located inside the roller hearth furnace and is coaxially installed on the tail rod body of the driven side of the roller rod 6; the head of the coupling 2 is fixedly connected to the roller sleeve 1, the tail of the coupling 2 extends through to the outside of the roller hearth furnace, and the shaft body of the coupling 2 is fixedly connected to the outer wall of the furnace shell 9 through a plate seat 8; both the roller sleeve 1 and the coupling 2 are made of high-temperature resistant materials and rotate synchronously with the roller rod 6.

[0035] The detection rod 3 is fixedly installed at the tail of the coupling 2 and rotates synchronously with the roller rod 6; a conductive ring 5 is installed on the detection rod 3,

[0036] The conductive ring 5 can be installed on the detection rod 3 with a limit. While rotating with the coupling 2, it always remains in contact connection with the coupling 2, or the conductive ring 5 is installed on a fixed plate body, and the fixed plate body is connected to the detection rod 3.

[0037] The fixed conductive part 4 and the conductive ring 5 are respectively connected to a detection device 7 through wires; the detection device 7 uses a signal display device with multiple channels such as an oscilloscope, a PLC controller, and an industrial computer controller.

[0038] The outermost trajectory line of the rotation trajectory of the detection rod 3 encloses a trajectory space, and the fixed conductive part 4 is in interference contact with the trajectory space. In this way, when the roller rod 6 is in normal operation, when the fixed conductive part 4 regularly contacts the detection rod 3, the detection device 7, the fixed conductive part 4 and the detection rod 3 are connected in series and electrically connected to form a detection circuit, and the detection circuit generates an electrically-signal with regular fluctuating changes.

[0039] After the roller rod 6 breaks, it stops rotating, the tail end tilts upward, the coupling 2 and the detection rod 3 at the tail end deviate from the normal operation trajectory, the fixed conductive part 4 and the detection rod 3 always contact or never contact, so no electrical signal is generated in the detection circuit or the electrical signal remains single and unchanged, that is, regular contact cannot be achieved, which is regarded as abnormal and an alarm is given.

[0040] The outermost trajectory line of the rotation trajectory of the detection rod 3 encloses a trajectory space, and the fixed conductive part 4 is in interference contact with the trajectory space. Therefore, theoretically, when the installation space is sufficient, the fixed conductive part 4 can be installed at any position along the outer edge line of the trajectory space.

[0041] Refer to the appendix Figure 1Or attached Figure 3 , an installation implementation manner of the fixed conductive member 4 is provided. The insulating bracket 10 is fixedly installed on the outer wall of the furnace shell 9 through the backing plate 12. The insulating bracket 10 extends away from the outer wall of the furnace shell. The fixed conductive member 4 is vertically fixed on the insulating bracket 10. The detection shaft 41 at the top is fixedly installed through the insulating bracket 10. The fixed end of the flexible conductive member 42 below is fixedly connected to the detection shaft 41. After the free end of the flexible conductive member 42 comes into interference contact with the trajectory space, it can rebound and reset to the original position.

[0042] For the convenience of description and understanding, in the following embodiments, the fixed conductive member 4 is defaulted to be vertically fixedly installed.

[0043] Among them, the insulating bracket 10 is made of ceramic or hard plastic. The flexible conductive member 42 can be made of conductive gel or metal spring. Refer to the attached Figure 3 In the vertical installation manner shown, the flexible conductive member 42 is made of metal spring. It can be foreseen that when the fixed conductive member 4 is adjusted to other positions except the vertical orientation, conductive gel can also be used for contact conduction.

[0044] The regular way of the detection rod 3 rotating and contacting the flexible conductive member 42 affects the change rule of the detection circuit signal.

[0045] In one embodiment, as shown in the attached Figure 4 , the detection rod 3 is configured as a single rod 301. The single rod 301 is fixedly installed at the tail of the coupling 2 through the conductive connecting member 11. The single rod 301 and the conductive connecting member 11 are made of temperature-resistant materials, such as stainless steel.

[0046] The height of the lowest point of the flexible conductive member 42 is lower than the height of the highest point of the rod body of the single rod 301 directly below. During the rotation of the following roller 6, the single rod 301 regularly contacts the fixed conductive member 4 to conduct the detection circuit. The electrical signal generated by the detection circuit can be regarded as a pulse signal. The pulse period is the time for the single rod 301 to rotate one week, and the pulse width is the contact time between the single rod 301 and the flexible conductive member 42.

[0047] In another embodiment or other implementation manners, the detection rod 3 is configured as a double rod 302 structure. The two double rods 302 on both sides are connected by the middle connecting plate 30. The connecting plate 30 is fixed on the coupling 2.

[0048] The height of the lowest point of the flexible conductive member 42 is lower than the height of the highest point of the moving trajectory of at least one of the double rods 302. As shown in the attached Figure 3 , the double rods 302 are symmetrically arranged and the whole with the middle connecting plate 30 is in a U shape. Under the normal operation state of the roller 6, within one rotation period, the two double rods 302 on both sides alternately contact the flexible conductive member 42. Correspondingly, within one rotation period, two pulse signals are generated in the detection circuit.

[0049] The conductive ring 5 and the fixed conductive member 4 are wire-connected to the wiring port of the same channel of the detection device 7. In this way, referring to the appendix Figure 2 , a separate broken rod alarm mechanism is formed for each roller rod of the roller hearth furnace to automatically identify a broken rod. Each roller rod corresponds to a channel of the detection device 7, which is convenient for quickly finding and positioning the broken rod position when a roller rod breaks (that is, specifically which roller rod breaks), greatly improving the equipment diagnosis efficiency. Whenever a roller rod breaks, the detection circuit detects an abnormal signal and directly alarms. The operating state (broken rod or normal operation) of each roller rod is visualized, which is convenient for observation and reduces the workload of equipment personnel.

[0050] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A roller rod breakage alarm mechanism for a roller hearth furnace, characterized in that, Comprising: A roller sleeve, located inside the roller hearth furnace, sleeved on the rod body at the tail of the roller rod; A coupling, fixedly connected to the roller sleeve, with the tail of the coupling extending outside the roller hearth furnace, and the shaft body of the coupling fixedly connected to the outer wall of the furnace shell through a plate seat; A detection rod, fixedly installed at the tail of the coupling, rotating synchronously with the roller rod; A conductive ring, in contact connection with the detection rod, and the conductive ring is connected to a detection device through a wire; A fixed conductive part, erected at the tail of the roller rod, and the fixed conductive part is connected to the detection device through a wire; When the roller rod is in normal operation and the fixed conductive part regularly contacts the detection rod, the detection device, the fixed conductive part and the detection rod are connected in series and electrically connected to form a detection circuit.

2. The broken rod alarm mechanism for the roller hearth furnace roller rod according to claim 1, characterized in that, The outermost trajectory line of the rotation trajectory of the detection rod encloses a trajectory space, and the fixed conductive part interferes and contacts with the trajectory space; Wherein, the fixed conductive part includes a detection shaft and a flexible conductive part, the detection shaft is fixedly installed through an insulating bracket, the fixed end of the flexible conductive part is fixedly connected to the detection shaft, and the free end of the flexible conductive part can rebound and reset to the original position after interfering and contacting with the trajectory space.

3. The roller rod breakage alarm mechanism of the roller hearth furnace according to claim 2, characterized in that, The detection rod is configured as a single rod structure, and the single rod is fixedly installed at the tail of the coupling through a conductive connecting piece; during the rotation with the roller rod, the single rod regularly contacts the fixed conductive part.

4. The roller breakage alarm mechanism of the roller hearth furnace according to claim 2, characterized in that, The detection rod is configured as a double rod structure, and the two side double rods are connected by an intermediate connecting plate, the connecting plate is fixed on the coupling, and at least one of the double rods regularly contacts the flexible conductive part.

5. The roller break alarm mechanism for the roller hearth furnace according to claim 1, characterized in that, When the roller rod is in normal operation, the detection circuit generates an electrically-signal with regular fluctuating changes. When the roller rod is in a broken state, the fixed conductive part and the detection rod are always in contact or always not in contact, and the electrical signal is single and unchanged, which is regarded as abnormal and an alarm is given.

6. The roller rod breakage alarm mechanism of the roller hearth furnace according to claim 1, characterized in that, The conductive ring and the fixed conductive part are wire-connected to the same channel connection port of the detection device.

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