CN214667231U - Weighing sensor fault diagnosis device - Google Patents

Abstract

The utility model provides a weighing sensor fault diagnosis device, belongs to weighing sensor fault diagnosis technical field, this fault diagnosis device, including pulling out the plug-in terminal box, pull out plug-in connector and detector, pull out the plug-in terminal box and link to each other with weighing sensor through pulling out the plug-in connector, pull out the plug-in connector and pull out the cooperation of inserting with the signal input part who pulls out the plug-in connector, pull out the signal output part of plug-in connector and be connected in order to detect weighing sensor at empty balance, unloaded output value and the variable quantity under the load state of weighing, the beneficial effects of the utility model are that, the utility model discloses an overall structure is simple, reforms transform with low costs, but the symmetry retransmission sensor trouble carries out early prediagnosis, and the critical situation who is in the trouble with weighing sensor accurately diagnoses in advance, has improved the initiative of maintaining, has ensured weighing apparatus's reliable, accurate, steady operation.

Description

Weighing sensor fault diagnosis device

Technical Field

The utility model relates to a weighing sensor fault diagnosis technical field especially relates to a weighing sensor fault diagnosis device.

Background

With the continuous deepening of the industrialization process, the weighing apparatus is more and more widely applied to the process flow, the process control and the trade settlement metering. The weighing sensor is a core component of the weighing apparatus. Due to the inherent characteristics of the weighing sensor, the weighing sensor is often in complicated and severe environments such as high temperature, high humidity and high dust, the faults of the weighing sensor have the characteristics of diversity and complexity, and the fault occurrence rate is very high. The replacement of the weighing sensor by field judgment not only influences the normal production rhythm, but also causes the situations of blast furnace damping down, converter shutdown, defective products, no measurement and the like, and seriously influences the economic benefit of enterprises. The problem of ensuring the weighing apparatus to be reliable, accurate and stable in complex and severe environments such as high temperature, high humidity and high dust is the problem in the current weighing apparatus metering.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a weighing sensor fault diagnosis device, but the symmetry weighing sensor trouble is carried out early prediagnosis, is in the critical situation of trouble with weighing sensor and accurately diagnoses in advance, improves the initiative of maintaining, can ensure weighing apparatus reliable, accurate, steady operation.

In order to achieve the above object, the present invention provides a technical solution for solving the technical problem: the weighing sensor fault diagnosis device comprises a plug-in type junction box, a plug-in type connector and a detector, wherein the plug-in type junction box is connected with a weighing sensor through a plug-in type connector, the plug-in type connector is in plug-in fit with a signal input end of the plug-in type connector, and a signal output end of the plug-in type connector is electrically connected with the detector to detect a weighing output value of the weighing sensor in an empty scale, no-load state and loading state.

The detector comprises a PLC, a display module and an alarm module, the plug-in connector is connected with the display module through the PLC to display weighing output values of the weighing sensor in empty scales, no-load states and loading states, and the plug-in connector is connected with the alarm module through the PLC to prompt that the weighing sensor is in a critical state of failure.

The plug-in type terminal box with the structure of plug-in type connector is the same, all includes protection box, bottom plate and bar socket, install bar socket on the bottom plate, be provided with interconnecting link on the bottom plate and be connected with bar socket electricity through interconnecting link, the lower extreme opening part of protection box with the bottom plate stationary phase links to each other and covers bar socket.

The protection box comprises an opening box and a cover plate, wherein the two ends of the opening box are open, the lower end of the opening box is fixed on the bottom plate, and the upper end of the opening box is detachably connected with the cover plate.

The upper end of opening box is provided with the U-shaped draw-in groove of a plurality of convenient inlet wires along its circumferencial direction, the U-shaped draw-in groove be provided with the sealing strip all around.

The inner side of the cover plate is provided with a sealing belt along the circumferential direction of the cover plate, and the cover plate is connected with the upper end of the opening box in a sealing mode through the sealing belt.

The plug-in type connector is connected with the strip-shaped socket in a positioning mode through a fixing bolt after being in plug-in fit.

The strip socket comprises a socket body and a conductive connecting sheet, wherein an inserting groove is formed in the socket body, the inserting groove is internally fixed with the conductive connecting sheet, the inserting type connector comprises a strip connector and a metal inserting sheet connected with the end of the strip connector, and the metal inserting sheet is matched with the inserting groove in an inserting mode and then is contacted with the conductive connecting sheet.

The socket comprises a socket body and is characterized in that a group of wiring terminals and fixing holes formed in two ends of the wiring terminals are formed in the strip-shaped connecting head, positioning holes are formed in two ends of the socket body respectively, the wiring terminals are electrically connected with the weighing sensor, and fixing bolts are installed in the two fixing holes and are fixedly connected with the corresponding positioning holes in the socket body through the fixing bolts.

The wiring terminal comprises 5 ports, wherein two ports are electrically connected with an excitation wire of the weighing sensor, two ports are electrically connected with a signal wire of the weighing sensor, and the other port is connected with a ground wire.

The utility model has the advantages that:

1. the utility model discloses traditional fault diagnosis method has been changed, through setting up the plug-in terminal box, plug-in connector and detector pull out, when patrolling and examining daily, directly will pull out plug-in connector and insert on the plug-in connector by pulling out the back on the plug-in terminal box, the detector receives the electricity and begins to detect weighing sensor at empty balance, the output value of weighing under no-load and the loading state, change value and the early diagnosis in advance of weighing sensor trouble is carried out through the output value of weighing, make and detect convenient and fast more, detection cost is low, can be in the critical situation of trouble with weighing sensor and accurately diagnose in advance, improve the initiative of maintenance, can ensure weighing apparatus reliable, it is accurate, the steady operation.

2. The utility model provides a detector includes PLC, display module and alarm module, the formula articulate of pulling out that will link to each other with weighing sensor's input/output cable and ground wire is on pulling out the formula connector back, it passes through PLC and display module to link to each other to pull out the formula connector of inserting, can gather weighing sensor at empty balance, the output value of weighing under no-load and the loading state, when the change value of the empty balance output or the no-load output of the weighing sensor who gathers reaches the certain percentage of the mv value that weighing sensor excitation voltage numerical value corresponds, weighing sensor's performance begins to deteriorate, PLC control alarm module reports to the police and is in the critical state of trouble with suggestion weighing sensor, it is more convenient to make the prognosis, further improved the initiative of maintenance, the weighing apparatus's reliability has been ensured, it is accurate, steady operation.

3. The utility model discloses traditional weighing sensor terminal box's mode of connection has been changed, adopt the mode of pulling out and inserting, pass earlier weighing sensor's input/output cable and ground wire promptly and connect on pulling out the binding post that inserts the formula joint through screw fastening after the U-shaped draw-in groove of opening box upper end, will pull out the formula joint and directly insert on the bar socket in pulling out the formula terminal box again, the fixing bolt who inserts the formula joint both ends is pulled out in the locking makes to pull out the formula joint and bar socket stable continuous, then close the upper end of fixing at the opening box with the apron lid, make weighing sensor's input/output cable and ground wire sealed, stable positioning, above-mentioned mode of connection convenient and fast more, time saving and labor saving, make overall structure after the wiring more reliable and more stable.

To sum up, the utility model has the advantages that the whole structure is simple, reforms transform with low costsly, but the symmetrical weighing sensor trouble is carried out early prediagnosis, is in the critical situation of trouble with weighing sensor and accurately diagnoses in advance, has improved the initiative of maintenance, has ensured reliable, accurate, the steady operation of weighing apparatus.

Drawings

The contents of the various figures of the specification and the labels in the figures are briefly described as follows:

FIG. 1 is a control schematic diagram of the present invention;

fig. 2 is a schematic view of an external structure of the middle plug-in type junction box or the plug-in type connector of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic structural view of the plug-in type connector of FIG. 3 being plugged in and mated with the strip socket;

the labels in the above figures are: 1. the plug-in type junction box comprises a plug-in type junction box body, 11 parts of a protection box body, 111 parts of an opening box body, 112 parts of a cover plate, 113 parts of a U-shaped clamping groove, 114 parts of sealing strips, 115 parts of sealing strips, 12 parts of a bottom plate, 13 parts of a strip-shaped socket body, 131 parts of a socket body, 132 parts of conductive connecting sheets, 133 parts of plug-in grooves, 134 parts of positioning holes, 2 parts of plug-in type connectors, 3 parts of detectors, 4 parts of plug-in type connectors, 41 parts of strip-shaped connectors, 411 parts of wiring terminals, 412 parts of fixing holes, 42 parts of metal inserting sheets, 5 parts of weighing sensors and 6 parts of fixing bolts.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses specific embodiment does: as shown in fig. 1, a weighing sensor fault diagnosis device includes a plug-in type terminal box 1, a plug-in type connector 2 and a detector 3, the plug-in type terminal box 1 is connected with a weighing sensor 5 through a plug-in type connector 4, the plug-in type connector 4 is in plug-in cooperation with a signal input end of the plug-in type connector 2, and a signal output end of the plug-in type connector 2 is electrically connected with the detector 3 to detect a weighing output value and a variation thereof of the weighing sensor 5 in an empty scale, an empty load state and a loading state. When patrolling and examining in daily life, on the formula of will pulling out plug-in connector 4 is inserted plug-in connector 2 by pulling out the back on the formula of pulling out plug-in terminal box 1, detector 3 receives the electricity and begins to detect weighing sensor 5 weighing output value under empty balance, no-load and loading state, through weighing output value variation and weighing sensor trouble go on early prediagnosis, make to detect convenient and fast more, detection cost is low, can be in weighing sensor and be in the critical condition of trouble accurate diagnosis in advance, improve the initiative of maintenance, can ensure weighing apparatus reliable, accurate, steady operation.

Specifically, as shown in fig. 1, the detector 3 includes a PLC, a display module and an alarm module, after the plug-in connector 4 connected to the input/output cable and the ground wire of the weighing sensor is connected to the plug-in connector 2, the plug-in connector 2 is connected to the display module through the PLC to display the weighing output value of the weighing sensor 5 in the empty-scale, no-load and loading states, the PLC includes a memory for storing the historical data of the collected weighing output value, the PLC compares the currently collected weighing output value with the last collected weighing output value, when the variation value of the collected empty-scale output or no-load output of the weighing sensor reaches 50% -70% of the mv value corresponding to the excitation voltage value of the weighing sensor, it indicates that the performance of the weighing sensor begins to deteriorate, the PLC controls the alarm module through data analysis to indicate that the weighing sensor 5 is in the critical state of failure, the pre-diagnosis is more convenient, the maintenance initiative is further improved, and the reliable, accurate and stable operation of the weighing apparatus is ensured.

Specifically, as shown in fig. 2 and fig. 3, the plug-in junction box 1 and the plug-in connector 2 have the same structure, and each of the plug-in junction box and the plug-in connector includes a protection box 11, a bottom plate 12 and a strip socket 13, the strip socket 13 is installed on the bottom plate 12, a connection circuit is provided on the bottom plate 12 and is electrically connected with the strip socket 13 through the connection circuit, the connection circuit is the same as the circuit structure in the existing junction box, and belongs to the existing structure, which is not described herein any more, the lower opening of the protection box 11 is fixed and connected with the bottom plate 12 through a screw, and covers the strip socket 13, and the protection box 1 protects the strip socket 13 and the connection circuit.

The protection box 11 comprises an opening box 111 and a cover plate 112, the two ends of the opening box 111 are open, the lower end of the opening box 111 is fixed on the bottom plate 12 through screws, the upper end of the opening box 111 is detachably connected with the cover plate 112, the cover plate 112 plays a role of sealing, connecting lines are effectively protected, a sealing strip 115 is arranged on the inner side of the cover plate 112 along the circumferential direction of the cover plate, the cover plate 112 is connected with the upper end of the opening box 111 through the sealing strip 115 in a sealing mode, the sealing effect of the whole protection box 11 is improved, and the dustproof water drainage effect is achieved. Further optimally, the upper end of the opening box 111 is provided with a plurality of U-shaped clamping grooves 113 facilitating incoming lines along the circumferential direction, the U-shaped clamping grooves 113 realize the positioning of cables, sealing strips 114 are arranged around the U-shaped clamping grooves 113, the sealing strips 114 penetrate the cables to be sealed and coated, and dust and water are further prevented from entering the protection box 11 through the U-shaped clamping grooves 113.

Specifically, the pluggable connector 4 is connected with the strip-shaped socket 13 in a positioning manner through the fixing bolt 6 after being plugged and matched. The concrete structure is as follows: the strip-shaped socket 13 comprises a socket body 131 and a conductive connecting sheet 132, an inserting groove 133 is formed in the socket body 131, the conductive connecting sheet 132 is fixed in the inserting groove 133, the inserting type connector 4 comprises a strip-shaped connector 41 and a metal inserting sheet 42 connected with the end portion of the strip-shaped connector, and the metal inserting sheet 42 is in contact with the conductive connecting sheet 132 after the inserting type connector 42 is in inserting fit with the inserting groove 133, so that the inserting fit of the inserting type connector 4 and the strip-shaped socket 13 is realized.

The strip-shaped connector 41 is provided with a group of wiring terminals 411 and fixing holes 412 arranged at two ends of the wiring terminals 411, two ends of the socket body 131 are respectively provided with the positioning holes 134, the wiring terminals 411 are electrically connected with the weighing sensor 5, the two fixing holes 412 are internally provided with fixing bolts 6 and are fixedly connected with the corresponding positioning holes 134 on the socket body 131 through the fixing bolts 6, further positioning and fixing of the pull-plug type connector 4 and the strip-shaped socket 13 are realized, and effective electric contact between the pull-plug type connector 4 and the strip-shaped socket 13 is guaranteed.

The connecting terminal 411 comprises 5 ports, wherein two ports are electrically connected with an excitation wire of the weighing sensor 5, when the strip-shaped connector 41 is inserted and positioned on the plug-in connector, an mv value corresponding to an excitation voltage value of the weighing sensor 5 can be collected through the detector 3, the two ports are electrically connected with a signal wire of the weighing sensor 5, weighing output values of the weighing sensor 5 in an empty scale, no-load and loading state can be collected through the detector 3, and the other port is connected with a ground wire to play a role in electric leakage protection.

The diagnosis steps of the weighing sensor fault diagnosis device are as follows:

first, preparation work

1. Replacing the traditional weighing sensor junction box with the pull-plug type junction box 1;

2. the input/output cable and the ground wire of the weighing sensor 5 are connected to the connecting terminal 411 corresponding to the plug-in connector 4, then the plug-in connector 4 is inserted into the strip-shaped socket 13 in the plug-in junction box 1, the fixing bolts 6 at the two ends are locked, the cover plate 112 is sealed, covered and positioned, the electronic weighing apparatus (or scale) is electrified, and the corresponding debugging is completed;

3. connecting the output cable of the plug-in connector 2 to a port corresponding to the detector 3;

4. the output value of the exciting voltage of the detector 3 is adjusted to be consistent with the exciting voltage of the weighing sensor of the electronic weighing apparatus (or balance) to be detected.

Second, detection work

1. Detecting an empty scale: the empty state refers to the state of the weighing apparatus (or scale) under the action of only the weighing platform (or weighing frame) and no other external force. When only the excitation voltage is applied in the idle state, the test of each weighing sensor of the electronic weighing apparatus (or the balance) is called idle detection. When only the excitation voltage is applied in the empty scale state, the test of each weighing sensor of the electronic weighing apparatus (or scale) is called empty scale detection.

Under the actual weighing working condition, the weighing platform (or weighing frame) and all mechanical parts are correctly positioned. Under the condition of power failure, the fixing bolt 6 on the plug-in connector 4 in the plug-in junction box 1 is loosened, the cable of the weighing sensor 5 of the detected electronic weighing instrument is pulled out from the plug-in junction box 1 together with the plug-in connector 4, the cable is inserted into the strip-shaped socket 13 corresponding to the plug-in connector 2, the fixing bolt 6 is locked, and the detector 3 starts to detect when receiving power. When the output signal of the weighing sensor 1 is stable, the corresponding information (position information, time information, etc.) is confirmed, collected, and input, and the detection is completed. This is the output value of the load cell empty scale.

2. No-load detection: the no-load state refers to the state of the weighing apparatus (or the balance) without any other external force. When only the excitation voltage is applied in the idle state, the test of each weighing sensor of the weighing apparatus (or the balance) is called idle detection. Under the condition of actual weighing working condition, each weighing sensor of the weighing apparatus (or the balance) is placed in an unloaded state. Under the condition of power failure, the fixing bolt 6 on the plug-in connector 4 in the plug-in junction box 1 is loosened, the cable of the weighing sensor 5 of the detected electronic weighing instrument is pulled out from the plug-in junction box 1 together with the plug-in connector 4, the cable is inserted into the strip-shaped socket 13 corresponding to the plug-in connector 2, the fixing bolt 6 is locked, and the detector 3 starts to detect when receiving power. When the output signal of the weighing sensor 1 is stable, the corresponding information (position information, time information, etc.) is confirmed, collected, and input, and the detection is completed. This is the output value of the load cell empty scale. When the output signal of the weighing sensor 1 is stable, the corresponding information (position information, time information, etc.) is confirmed, collected, and input, and the detection is completed. This is the unloaded output of the load cell.

3. Load measurements were made with standard weights. Under the condition of standard weight loading, the output value of each weighing sensor of the electronic weighing apparatus (or the scale) is measured, and corresponding information (position information, time information and the like) is confirmed, collected and input to indicate the standard weight value. This is the load cell calibration output.

And then, the cables of the weighing sensor are respectively pulled out from the plug-in connector 2 and restored to the plug-in junction box 1, the fixing bolts 6 are locked, and the detection work is finished.

Third, tracking and detecting in polling

Daily empty scale output that patrols and examines generally detects weighing sensor, when weighing sensor's empty scale output change is little, then can be according to the idle load output of original time gap detection.

When the output of the empty scale of the weighing sensor is greatly changed and reaches 50% -70% of the mv value corresponding to the excitation voltage value of the weighing sensor, the detector 3 alarms and prompts that the weighing sensor 5 is in a fault critical state, and the no-load output of the weighing sensor is required to be further detected; if the no-load output of the weighing sensor is not changed greatly, whether the machinery of the weighing machine (or the scale) has problems or not is checked; if the no-load output change of the weighing sensor is large and reaches 50% -70% of the mv value corresponding to the excitation voltage value of the weighing sensor, the detector 3 gives an alarm to prompt that the weighing sensor 5 is in a fault critical state, the tracking time gap is shortened, and the tracking density is increased. If the weighing display instrument has a base number and cannot automatically track back to a zero position when the weighing display instrument is in an empty scale state, the standard weight is out of tolerance during calibration, and at the moment, the corresponding weighing sensor is required to be replaced in time.

The device enriches the point inspection content, can comprehensively monitor all weighing sensors running on line, effectively and timely grasps the life cycle of the weighing sensors under specific working conditions, changes fault treatment into more targeted and more predictable, can quickly and accurately judge fault points, and shortens the fault treatment time. Meanwhile, the maintenance concept of 'zero fault' is embodied, so that spare parts can work more firmly and effectively, and the saving consciousness is embodied.

The device still adopts the working method of plug-in formula, makes the operation of daily electronic weighing apparatus convenient and fast more with the conversion work that detects, and detection achievement becomes labour saving and time saving, easily promotes.

The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.

Claims (9)

1. The weighing sensor fault diagnosis device is characterized by comprising a plug-in type junction box (1), a plug-in type connector (2) and a detector (3), wherein the plug-in type junction box (1) is connected with a weighing sensor (5) through a plug-in type joint (4), the plug-in type joint (4) is in plug-in fit with a signal input end of the plug-in type connector (2), and a signal output end of the plug-in type connector (2) is electrically connected with the detector (3) so as to detect a weighing output value of the weighing sensor (5) in an empty scale, no-load state and loading state;

the detector (3) comprises a PLC, a display module and an alarm module, the plug-in connector (2) is connected with the display module through the PLC to display weighing output values of the weighing sensor (5) in empty scales, no-load states and loading states, and the plug-in connector (2) is connected with the alarm module through the PLC to prompt that the weighing sensor (5) is in a fault critical state.

2. The load cell malfunction diagnosis device according to claim 1, characterized in that: pull out plug-in junction box (1) with the structure of pulling out plug-in connector (2) is the same, all includes protection box (11), bottom plate (12) and bar socket (13), install bar socket (13) on bottom plate (12), be provided with interconnecting link on bottom plate (12) and be connected with bar socket (13) electricity through interconnecting link, the lower extreme opening part of protection box (11) with bottom plate (12) stationary phase links to each other and covers bar socket (13).

3. The load cell malfunction diagnosis device according to claim 2, characterized in that: the protection box (11) comprises an opening box (111) and a cover plate (112), the two ends of the opening box (111) are opened, the lower end of the opening box (111) is fixed on the bottom plate (12), and the upper end of the opening box (111) is detachably connected with the cover plate (112).

4. The load cell malfunction diagnosis device according to claim 3, characterized in that: the upper end of opening box (111) is provided with a plurality of U-shaped draw-in grooves (113) that make things convenient for the inlet wire along its circumferencial direction, be provided with sealing strip (114) around U-shaped draw-in groove (113).

5. The load cell malfunction diagnosis device according to claim 3, characterized in that: the inner side of the cover plate (112) is provided with a sealing band (115) along the circumferential direction thereof, and the cover plate (112) is connected with the upper end of the opening box (111) in a sealing way through the sealing band (115).

6. The load cell malfunction diagnosis device according to any one of claims 2 to 5, characterized in that: the plug-in connector (4) is connected with the strip-shaped socket (13) in a positioning mode through a fixing bolt (6) after being in plug-in fit.

7. The load cell malfunction diagnosis device according to claim 6, characterized in that: bar socket (13) are including socket ontology (131) and electrically conductive connection piece (132), be provided with grafting recess (133) in socket ontology (131), grafting recess (133) internal fixation electrically conductive connection piece (132), the formula of inserting connects (4) and includes bar connector (41) and end connection's metal inserted sheet (42) of inserting, metal inserted sheet (42) with make after grafting recess (133) grafting cooperation metal inserted sheet (42) with electrically conductive connection piece (132) contact.

8. The load cell malfunction diagnosis device according to claim 7, characterized in that: be provided with fixed orifices (412) that a set of binding post (411) and both ends set up on bar connector (41), the both ends of socket ontology (131) are provided with locating hole (134) respectively, binding post (411) with weighing sensor (5) electricity is connected, install in two fixed orifices (412) fixing bolt (6) and through fixing bolt (6) with locating hole (134) that correspond on socket ontology (131) are fixed continuous.

9. The load cell malfunction diagnosis device according to claim 8, characterized in that: the wiring terminal (411) comprises 5 ports, wherein two ports are electrically connected with an excitation wire of the weighing sensor (5), two ports are electrically connected with a signal wire of the weighing sensor (5), and the other port is connected with a ground wire.

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