Pendant type roller furnace broken rod detection device

Abstract

The utility model belongs to the technical field of roller furnaces, and discloses a pendant type roller furnace broken bar detection device, which comprises roller bars and a support frame, one end of each roller bar is provided with a metal detection sheet, the metal detection sheet is provided with a trigger part, the support frame is provided with first conducting rods which are in one-to-one correspondence with the roller bars, the first conducting rods are insulated from the support frame, and the first conducting rods are connected with the support frame. The lower end of the first conductive rod is provided with a first conductive rope which is freely drooping, the first conductive rope is in discontinuous contact with the rotating trigger part and is in continuous contact or not contact with the stalling trigger part, the supporting frame is further provided with a conductive structure, and the first conductive rod is electrically connected with one end of the detection circuit. The conductive structure is electrically connected with the other end of the detection circuit, and whether the detection circuit is disconnected discontinuously serves as a basis for judging whether the roller is normal or not. According to the pendant type roller furnace broken rod detection device, the principle that the drooping conductive rope and the normally rotating metal detection sheet are in intermittent contact is adopted, and the detection circuit is matched, so that the broken rod condition can be rapidly detected.

Description

Technical Field

[0001] The utility model relates to the technical field of roller furnaces, in particular to a pendant type broken rod detection device for roller furnaces. Background Art

[0002] The roller furnace is an electronic device that drives hundreds of rollers to rotate through a motor to drive the sagger loaded with materials to move forward. During the sintering process, the sagger carrying the materials is placed on many parallel horizontal high-temperature resistant rollers, and the rotating rollers are used as sagger carriers to transfer the sagger from the front end to the back end by the rotation of the rollers. The rollers are made of silicon carbide or high-temperature ceramics. During the long-term operation of the roller furnace, the strength of the rollers will be reduced due to the high temperature environment and wear. At the same time, with the increase in the output of the kiln, the speed of the rollers is accelerated, and the loss of the rollers in the high temperature and corrosive environment increases. When subjected to a strong enough impact force, the rollers will break. If not handled in time, it will cause major accidents such as the change of the movement direction of the sagger, the stacking of saggers, and the blockage of the kiln, which will bring inestimable direct and indirect losses to customers.

[0003] The traditional broken rod detection method is to conduct manual inspections and visual inspections. Due to the limited manpower, it is not possible to monitor the roller rod breakage in a timely and comprehensive manner. The cost is low but the reliability and effect are poor. There are some automatic detection devices that use grating detection or spring plus detection sheet, which can realize the online monitoring function. However, due to the high temperature in the roller rod transmission sealing chamber of the roller furnace, smoke, water vapor and other pollutants will be generated during the sintering process. The high temperature resistance, corrosion resistance and anti-pollution performance of gratings, springs and other components are insufficient. For example, false alarms will occur when the grating is contaminated, and the spring is prone to deformation and breakage, which greatly affects the detection accuracy and needs to be improved. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a pendant type roller furnace broken rod detection device to reduce the influence of smoke, water vapor, etc. and improve the detection accuracy and sensitivity.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pendant type roller furnace broken rod detection device, comprising a plurality of rollers horizontally arranged in the roller furnace and a support frame located above the rollers, one end of each roller is provided with a metal detection sheet, one end of the metal detection sheet is provided with a fixing portion fixed to the end of the roller, and the other end of the metal detection sheet is provided with a trigger portion extending from the end of the roller, and the trigger portion rotates with the roller;

[0007] The support frame is provided with a first conductive rod corresponding to each roller rod, the first conductive rod is insulated from the support frame, and a first conductive rope is freely hanging at the lower end of the first conductive rod. The first conductive rope is in intermittent contact with the rotating trigger part, and is in continuous contact or non-contact with the stopped trigger part.

[0008] The support frame is also provided with a conductive structure, which is electrically connected to each metal detection sheet, or the conductive structure and the first conductive rope are synchronously in contact with or not in contact with the same triggering part;

[0009] The first conductive rod is electrically connected to one end of the detection circuit through a first wire, and the conductive structure is electrically connected to the other end of the detection circuit through a second wire. Whether the detection circuit is intermittently disconnected is used as a basis for judging whether the roller is normal.

[0010] As an optional solution, the conductive structure includes a brush, the fixed part is cylindrical and sleeved on the end of the roller, the support frame is conductive, the brush is fixed on the support frame, and the brush is in continuous contact with the circumferential surface of the fixed part, and the second wire connects the support frame.

[0011] As an optional solution, the conductive structure includes a second conductive rod distributed parallel to the first conductive rod along the extension direction of the trigger part, and a second conductive rope freely hanging is provided at the lower end of the second conductive rod. The second conductive rope and the first conductive rope synchronously contact or do not contact the trigger part.

[0012] As an optional solution, the first conductive rod and the conductive structure corresponding to each roller are respectively connected to a detection circuit to perform individual detection on each roller.

[0013] As an optional solution, the first conductive rods and conductive structures corresponding to the plurality of rollers are connected in series to a detection circuit to perform segmented detection on each roller.

[0014] As an optional solution, a metal pendant is suspended at the lower end of the first conductive rope, and the metal pendant directly contacts the triggering part instead of the first conductive rope.

[0015] As an optional solution, the triggering portion is rod-shaped.

[0016] As an optional solution, the trigger portion is in the shape of an arc sheet, and the cross-sectional center angle of the trigger portion is 75° to 180°.

[0017] As an optional solution, a power supply and an intermediate relay are also provided in the detection circuit. The intermediate relay is connected to the PLC signal. When the first conductive rope contacts the trigger part, the intermediate relay is energized and the PLC obtains a signal.

[0018] The beneficial effects of the utility model are as follows: the pendant type roller furnace broken rod detection device adopts the principle of intermittent contact between the hanging conductive rope and the normally rotating metal detection piece, and cooperates with the detection circuit to quickly detect the broken rod situation. The hanging manner of the conductive rope is not easily affected by smoke, water vapor, etc., the detection result is accurate and reliable, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a pendant type roller furnace broken rod detection device provided in Example 1 of the utility model;

[0020] Figure 2 It is a side view of the pendant type roller furnace broken rod detection device provided in Example 1 of the utility model;

[0021] Figure 3 It is a schematic diagram of the contact between the metal pendant and the metal detection sheet in the pendant type roller furnace broken rod detection device provided in Example 1 of the utility model;

[0022] Figure 4 This is a circuit diagram of a pendant type roller furnace broken rod detection device provided in Example 1 of the utility model;

[0023] Figure 5 It is a structural side view of a pendant type roller furnace broken rod detection device provided in Example 2 of the utility model;

[0024] Figure 6 It is a circuit diagram of a pendant type roller furnace broken rod detection device provided in Example 2 of the utility model.

[0025] In the attached figure:

[0026] 1. Roller; 2. Support frame; 3. Metal detection piece; 3a. Fixing part; 3b. Trigger part; 4. First conductive rod; 5. First conductive rope; 6. First conducting wire; 7. Second conducting wire; 8. Brush; 9. Insulating block; 10. Metal pendant; 11. Power supply; 12. Intermediate relay; 13. PLC; 14. Second conductive rod; 15. Second conductive rope. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] Embodiment 1:

[0032] See also Figures 1 to 4 As shown, this preferred embodiment provides a pendant type roller furnace broken rod detection device, comprising a plurality of rollers 1 horizontally arranged in the roller furnace and a support frame 2 located above the rollers 1, one end of each roller 1 is provided with a metal detection piece 3, one end of the metal detection piece 3 is provided with a fixing portion 3a fixed to the end of the roller 1, and the other end of the metal detection piece 3 is provided with a triggering portion 3b extending from the end of the roller 1, and the triggering portion 3b rotates with the roller 1;

[0033] The support frame 2 is provided with a first conductive rod 4 corresponding to each roller 1, the first conductive rod 4 is insulated from the support frame 2, and a first conductive rope 5 is freely hanging at the lower end of the first conductive rod 4. The first conductive rope 5 is in intermittent contact with the rotating trigger part 3b, and is in continuous contact or non-contact with the stopped trigger part 3b;

[0034] The support frame 2 is also provided with a conductive structure, which is electrically connected to each metal detection sheet 3;

[0035] The first conductive rod 4 is electrically connected to one end of the detection circuit through the first wire 6, and the conductive structure is electrically connected to the other end of the detection circuit through the second wire 7. Whether the detection circuit is intermittently disconnected is used as a basis for judging whether the roller 1 is normal.

[0036] The principle is that when the first conductive rod 4 contacts the trigger part 3b, the detection circuit forms a path; when the first conductive rod 4 does not contact the trigger part 3b, the detection circuit forms an open circuit.

[0037] If the corresponding roller 1 keeps rotating, the detection circuit will be disconnected intermittently; if the corresponding roller 1 is broken and stops, the detection circuit will be disconnected continuously or connected continuously.

[0038] Therefore, the pendant type roller furnace broken rod detection device adopts the principle of intermittent contact between the hanging first conductive rope 5 and the normally rotating metal detection piece 3, and cooperates with the detection circuit to quickly detect the broken rod situation. Moreover, the hanging manner of the first conductive rope 5 is not easily affected by smoke, water vapor, etc., the detection result is accurate and reliable, and the service life is long.

[0039] Among them, the first conductive rope 5 is preferably a conductive steel wire rope. It should be noted that although the steel wire rope swings when falling back, the swing amount is small, and the length of the steel wire rope is moderate, and only the lower end is in contact with the metal detection piece 3, thereby ensuring that the metal detection piece 3 maintains intermittent contact with the steel wire rope during rotation.

[0040] Specifically, the conductive structure here includes a brush 8, the fixed part 3a is cylindrical and is sleeved on the end of the roller 1, the support frame 2 is conductive, an insulating block 9 is arranged between the first conductive rod 4 and the support frame 2, the brush 8 is fixed on the support frame 2, and the brush 8 is in continuous contact with the circumferential surface of the fixed part 3a, and the second wire 7 is connected to the support frame 2.

[0041] As needed, the first conductive rods 4 and the conductive structure corresponding to each roller 1 are respectively connected to a detection circuit to perform individual detection on each roller 1; or, the first conductive rods 4 and the conductive structure corresponding to every several rollers 1 are connected in series to a detection circuit to perform segmented detection on each roller 1.

[0042] In particular, a metal pendant 10 is suspended at the lower end of the first conductive rope 5, and the metal pendant 10 directly contacts the triggering part 3b instead of the first conductive rope 5, as shown in Figure 3 .

[0043] Furthermore, the trigger part 3b here may be rod-shaped; or, the trigger part 3b may be arc-shaped, and the cross-sectional central angle of the trigger part 3b is preferably 75° to 180°, so as to be in obvious intermittent contact with the first conductive rope 5.

[0044] Specifically, the detection circuit is also provided with a power supply 11 and an intermediate relay 12, and the intermediate relay 12 is connected to the PLC 13 signal. When the first conductive rope 5 contacts the trigger part 3b, the intermediate relay 12 is powered and the PLC 13 obtains a signal. Figure 4 When PLC13 does not receive a signal for a long time or always has a signal, it can be determined that roller 1 is broken. This detection method is reliable and has no blind spots.

[0045] Embodiment 2:

[0046] See also Figure 5 and Figure 6 As shown, based on the first embodiment, this embodiment provides another pendant type roller furnace broken rod detection device, the difference is that the conductive structure here contacts or does not contact the same trigger part 3b synchronously with the first conductive rope 5.

[0047] Specifically, the conductive structure includes a second conductive rod 14 arranged in parallel with the first conductive rod 4 along the extending direction of the trigger portion 3b, and a second conductive rope 15 freely hanging is provided at the lower end of the second conductive rod 14. The second conductive rope 15 and the first conductive rope 5 synchronously contact or do not contact the trigger portion 3b.

[0048] Thus, the second conductive rope 15 and the first conductive rope 5 are synchronized by the second conductive rope 15 having the same contact form as the first conductive rope 5. It should be noted that although the second conductive rope 15 and the first conductive rope 5 have non-completely consistent swings, the contact and non-contact conditions of the two in the process of contacting the rotating trigger part 3b are basically the same. Similarly, if the corresponding roller 1 continues to rotate, the detection circuit is intermittently disconnected; if the corresponding roller 1 is broken and stationary, the detection circuit will be continuously disconnected or continuously connected.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pendant type roller furnace broken rod detection device, characterized in that: The invention comprises a plurality of rollers (1) arranged horizontally in a roller furnace and a support frame (2) located above the rollers (1), wherein one end of each roller (1) is provided with a metal detection sheet (3), one end of the metal detection sheet (3) is provided with a fixing portion (3a) fixed to the end of the roller (1), and the other end of the metal detection sheet (3) is provided with a trigger portion (3b) extending from the end of the roller (1), and the trigger portion (3b) rotates with the roller (1). The support frame (2) is provided with a first conductive rod (4) corresponding to each of the rollers (1), the first conductive rod (4) is insulated from the support frame (2), and a first conductive rope (5) is freely suspended at the lower end of the first conductive rod (4), the first conductive rope (5) is in intermittent contact with the rotating trigger part (3b), and is in continuous contact or non-contact with the stopped trigger part (3b); The support frame (2) is also provided with a conductive structure, the conductive structure is electrically connected to each of the metal detection sheets (3), or the conductive structure and the first conductive rope (5) are synchronously in contact with or not in contact with the same triggering portion (3b); The first conductive rod (4) is electrically connected to one end of a detection circuit via a first conductive wire (6), and the conductive structure is electrically connected to the other end of the detection circuit via a second conductive wire (7), and whether the detection circuit is intermittently disconnected is used as a basis for judging whether the roller (1) is normal.

2. The pendant type roller furnace broken rod detection device according to claim 1 is characterized in that: The conductive structure comprises a brush (8), the fixed portion (3a) is cylindrical and sleeved on the end of the roller (1), the support frame (2) is conductive, the brush (8) is fixed on the support frame (2), and the brush (8) is in continuous contact with the circumferential surface of the fixed portion (3a), and the second wire (7) is connected to the support frame (2).

3. The pendant type roller furnace broken rod detection device according to claim 1 is characterized in that: The conductive structure comprises a second conductive rod (14) arranged in parallel with the first conductive rod (4) along the extension direction of the trigger portion (3b); a second conductive rope (15) freely hanging down is arranged at the lower end of the second conductive rod (14); the second conductive rope (15) and the first conductive rope (5) are synchronously in contact with or not in contact with the trigger portion (3b).

4. The pendant type roller furnace broken rod detection device according to claim 2 or 3, characterized in that: The first conductive rod (4) and the conductive structure corresponding to each roller (1) are respectively connected to one detection circuit so as to perform individual detection on each roller (1).

5. The pendant type roller furnace broken rod detection device according to claim 2 or 3, characterized in that: The first conductive rods (4) and the conductive structures corresponding to the plurality of rollers (1) are connected in series to one detection circuit so as to perform segmented detection on each of the rollers (1).

6. The pendant type roller furnace broken rod detection device according to claim 1, characterized in that: A metal pendant (10) is suspended at the lower end of the first conductive rope (5), and the metal pendant (10) directly contacts the triggering portion (3b) instead of the first conductive rope (5).

7. The pendant type roller furnace broken rod detection device according to claim 1, characterized in that: The trigger part (3b) is rod-shaped.

8. The pendant type roller furnace broken rod detection device according to claim 1, characterized in that: The trigger portion (3b) is in the shape of an arc sheet, and the cross-sectional center angle of the trigger portion (3b) is 75° to 180°.

9. The pendant type roller furnace broken rod detection device according to claim 1, characterized in that: The detection circuit is also provided with a power supply (11) and an intermediate relay (12), wherein the intermediate relay (12) is connected to a PLC (13) signal. When the first conductive rope (5) contacts the trigger part (3b), the intermediate relay (12) is energized and the PLC (13) obtains a signal.

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