A heavy hammer type level meter

Abstract

The present invention discloses a weight-type material level meter, which belongs to the technical field of silo monitoring equipment, and includes a box body, a weight, a steel wire rope connected to the weight, a wheel group, and a controller. The wheel group includes a drum and a measuring wheel. The steel wire rope is wound on the drum and passes through a pendulum and a measuring wheel in sequence. A mounting plate is provided in the box body, and a motor for driving the drum to rotate is provided on the mounting plate. A swing rod and a supporting spring are provided on the mounting plate. One end of the swing rod is hinged on the mounting plate, and the other end of the swing rod is provided with a pendulum. One end of the supporting spring is connected to the mounting plate, and the other end is connected to the swing rod. A sensor for detecting the swing of the swing rod is provided on the mounting plate, and the sensor and the motor are both electrically connected to the controller. When the present application is working, it can sensitively monitor the weightlessness state of the weight, control the motor to drive the weight to rise, complete the material detection, and avoid the weight being buried, resulting in damage to the motor. The present application senses the swing position of the pendulum according to the sensor, timely understands the state of the weight, and judges whether the weight is faulty, thereby increasing the robustness of the present application.

Description

Technical Field

[0001] The invention belongs to the technical field of silo monitoring equipment, and in particular relates to a weight-hammer type material level meter. Background Art

[0002] There are three unavoidable dangers in the use of silos: overpressure, roof burst and material shortage. Overpressure means that the silo is in a positive pressure state during the loading process, and the air is not discharged to the outside in time, which exceeds the industry standard; roof burst means that there is no material level display during the loading process, causing the material to fill the silo; material shortage means that there is no warning of the material level during the material discharge process in the silo, affecting production.

[0003] Therefore, it is necessary to measure the height of the material in the silo so that the user can reliably grasp the material level in the silo. The weight level meter in the prior art consists of a measuring and controlling instrument and a connected weight level detection actuator. The principle is that the weight level detection actuator is placed on the top of the silo, and the weight is pulled into the silo by a motor through a wire rope. The weight starts to drop from the starting position on the top of the silo, and immediately returns to the top of the silo when it touches the material surface to wait for the next measurement. Because the weight level meter often works in a dusty environment, the lever sensing sensitivity is low, and the hammer is often buried. In addition, the failure of the hammer cannot be judged in time, which often causes abnormal conditions such as motor damage or even hammer breakage. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a weight-type material level meter, which can sensitively identify the weightless state of the weight, so that the motor can accurately lift the weight, avoiding damage to the motor caused by the burial of the weight.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a weight-type material level meter, comprising a box body, a weight, a wire rope connected to the weight, a wheel group wound around the wire rope, and a controller, a mounting plate is arranged in the box body, the wheel group is arranged on the rear side of the mounting plate, the controller is arranged on the front side of the mounting plate, the wheel group includes a drum and a measuring wheel, a motor for driving the drum to rotate is arranged on the front side of the mounting plate, a rocker mechanism is hingedly arranged on the rear side of the mounting plate, the rocker mechanism includes a rocker, one side of the rocker The end is hinged on the mounting plate, the other end of the rocker arm is a free end, a balance wheel is arranged on the free end of the rocker arm, the rocker arm is placed along the left and right directions, the rocker arm mechanism also includes a support spring, one end of the support spring is connected to the mounting plate, the other end of the support spring is connected to the rocker arm, the wire rope is wound on the drum, passes through the balance wheel and the measuring wheel in sequence, the weight extends out from the lower end of the box body, a sensor for detecting the state of the rocker arm is arranged on the mounting plate, and the sensor and the motor are both electrically connected to the controller.

[0006] Further preferably, a limit plate is provided on the rocker arm, the left end of the limit plate is hinged to the hinged end of the rocker arm, a tension spring is provided between the right end of the limit plate and the mounting plate, the right end of the limit plate is provided with a positioning groove, and a positioning column is provided on the rocker arm, the positioning column is located in the positioning groove and can move in the positioning groove, the lower end surface of the positioning groove balances the rocker arm during the wire rope retraction and release process and when the wire rope is fully retracted, and the upper end surface of the positioning groove corresponds to the swing limit limit of the rocker arm when the heavy hammer is in a weightless state.

[0007] Further preferably, the sensor is a Hall sensor, which includes a magnet arranged at the free end of the rocker arm, and a Hall circuit board arranged on the front side of the mounting plate, and the Hall circuit board is provided with a Hall semiconductor chip for sensing the position of the magnet.

[0008] Further preferably, at least 3 Hall semiconductor chips are arranged on the Hall circuit board, and the Hall semiconductor chips are arranged along the curved path of movement of the magnet. Some of the Hall semiconductor chips are located at the position corresponding to the magnet when the wire rope is fully retracted, so as to detect whether the weight has risen to the vertex position, some of the Hall semiconductor chips are located at the position corresponding to the magnet during the retraction and release of the wire rope, so as to detect the movement state of the weight, and some of the Hall semiconductor chips are located on the movement path of the magnet when the weight loses weight, so as to detect whether the weight is in a weightless state.

[0009] Further preferably, the drum is arranged on the left side of the upper end of the mounting plate, the hinged end of the swing rod is arranged below the drum, the free end of the swing rod is located on the right side of the drum, and the measuring wheel is arranged below the side of the balance wheel.

[0010] Further preferably, the wheel set also includes a guide wheel arranged at the lower left end of the rear side surface of the mounting plate, and the wire rope first passes through the guide wheel and then passes through the balance wheel and the measuring wheel in sequence.

[0011] Further preferably, an upper stop block and a lower stop block are respectively provided on the rear side surface of the mounting plate at the upper and lower sides of the swing rod.

[0012] Further preferably, a side stopper is provided on one side of the measuring wheel around the wire rope.

[0013] Further preferably, a rope passing tube is fixedly provided at the lower end of the box body, an observation hole is provided on the rope passing tube, and an observation cover for opening and closing the observation hole is provided on the observation hole.

[0014] Further preferably, a soot blowing device is provided in the box body, and the soot blowing device comprises a soot blowing pipe fixed in the box body, and the upper end of the soot blowing pipe is bent downward.

[0015] The beneficial effects of the present invention are as follows: the weight-type material level meter provided by the present invention has a steel wire rope connected to the weight passing around the pendulum on the pendulum rod. During the movement of the weight, the steel wire rope exerts a downward pulling force on the pendulum rod, and the supporting spring exerts an upward force on the pendulum rod, so that the pendulum rod is in a balanced and immobile state during the movement of the weight and when the weight reaches the top. When the weight contacts the material surface during the movement, the material surface exerts an upward force on the weight. Since the length of the steel wire rope does not change, the weight is in a weightless state at that moment. At this time, the mutually balanced forces originally exerted on the pendulum rod are destroyed, and the pulling force exerted on the pendulum rod by the weight is instantly reduced. The pendulum rod will swing greatly under the action of the supporting spring. A sensor is provided on the mounting plate, and the sensor can detect the swing state of the pendulum rod. When the sensor detects that the pendulum rod swings greatly, a swinging electrical signal will be generated and transmitted to the controller. The controller determines that the weight has contacted the material surface, and the controller controls the motor to reverse, driving the weight to rise back to the top position. The weight completes a test, and is retracted to the origin to wait for the next test. At the same time, the sensor can also detect that the pendulum is in a balanced state during the process of the weight being retracted and released, and monitor the movement process of the weight. The present application can sensitively monitor the weightless state of the weight, and timely control the motor to drive the weight to rise, thereby avoiding the weight being buried and causing damage to the motor. The present application can further sense the swing position of the pendulum when the weight is subjected to a large force based on the sensor, timely understand the state of the weight, determine whether the weight is faulty, and the controller can shut down the machine for maintenance in time, further increasing the robustness of the present application.

[0016] The limit plate and the positioning groove provided on the limit plate are further preferably provided, and the positioning column on the swing rod cooperates with the positioning groove, so that the force opposite to the pulling force of the weight on the swing rod is borne by the supporting spring and the tension spring of the limit plate, that is, the swing rod adopts a double spring to apply force when balancing the pulling force of the weight, which reduces the working strength of the supporting spring, and the double spring force can also eliminate the resonance of the spring, thereby increasing the service life of the present application. Secondly, the limit plate provided remains stationary when the weight loses weight and causes the swing rod to move. When the weight loses weight and the weight is in the process of rising, the swing rod swings rapidly. When the positioning column on the swing rod hits the lower wall of the positioning groove of the limit plate, the swing rod can be quickly restored to a balanced state, thereby ensuring the steady rise of the weight.

[0017] Further preferably, the sensor adopts a Hall sensor, which is sensitive to magnetic fields, has a simple structure, a small size, a wide frequency response, a large output voltage change and a long service life.

[0018] Further preferably, a Hall semiconductor chip for sensing the three states of the pendulum is provided on the Hall circuit board, so that the motion state of the weight can be monitored and fed back in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of an embodiment of a weight-type material level meter of the present invention;

[0020] Figure 2 It is a schematic diagram of the balanced position of the swing arm of the embodiment of the weight-type material level meter of the present invention during the process of retracting and extending the weight;

[0021] Figure 3 It is a schematic diagram of the balanced position of the swing arm when the weight rises to the top in the embodiment of the weight type material level meter of the present invention;

[0022] Figure 4 It is a schematic diagram of the position of the swing rod of the embodiment of the weight-type material level meter of the present invention when the weight fails to be pulled downward;

[0023] Figure 5 It is a schematic diagram of the position of the swing rod of the embodiment of the weight-type material level meter of the present invention when the wire rope breaks;

[0024] Figure 6 It is a schematic structural diagram of a Hall circuit board in an embodiment of a weight-type material level meter of the present invention. DETAILED DESCRIPTION

[0025] In the description of the specific embodiments of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" refers to two or more. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] The embodiment of the weight-type material level meter provided by the present invention is as follows: Figures 1 to 6 As shown, it includes a box body 1, a weight 2, a wire rope 3 connected to the weight 2, a wheel group wound around the wire rope 3, and a controller 5. A mounting plate 4 is arranged in the box body 1, the wheel group is arranged on the rear side of the mounting plate 4, the controller 5 is arranged on the front side of the mounting plate 4, the wheel group includes a drum 6 and a measuring wheel 7, a motor 8 for driving the drum 6 to rotate is arranged on the front side of the mounting plate 4, a swing rod mechanism is hingedly arranged on the rear side of the mounting plate 4, and the swing rod mechanism includes a swing rod 9, one end of which is hingedly connected to the mounting plate 4. On the plate 4, the other end of the pendulum 9 is a free end, and a balance wheel 10 is arranged on the free end. The pendulum 9 is placed along the left and right direction. The pendulum mechanism also includes a support spring 11. One end of the support spring 11 is connected to the mounting plate 4, and the other end is connected to the pendulum 9. The wire rope 3 is wound on the drum 6, passing through the balance wheel 10 and the measuring wheel 7 in sequence. The weight 2 extends from the lower end of the box body 1. A sensor for detecting the swing of the pendulum 9 is arranged on the mounting plate 4, and the sensor and the motor 8 are both electrically connected to the controller 5.

[0029] During use of this embodiment, when it is necessary to detect the height of the material surface, the motor 8 drives the reel 6 to rotate and release the wire rope, and the weight 2 moves downward. Since the wire rope 3 connected to the weight 2 passes around the pendulum 10 on the pendulum rod 9, during the movement of the weight 2, the wire rope 3 gives the pendulum rod 9 a downward pulling force, and the supporting spring 11 gives the pendulum rod 9 an upward force, so that the pendulum rod 9 is in a balanced and immobile state during the movement of the weight 2 and when the weight 2 reaches the top. When the weight 2 contacts the material surface during the movement, the material surface exerts an upward force on the weight 2. Since the length of the released wire rope 3 does not change, the weight 2 instantly forms a weightless state. At this time, the mutually balanced forces originally received by the pendulum 9 are destroyed, and the force applied by the weight 2 to the pendulum 9 is instantly reduced. The pendulum 9 will swing greatly under the force of the supporting spring 11. A sensor is arranged on the mounting plate 4, and the sensor can detect the swing state of the pendulum 9. The pendulum 9 touches the sensor during the swinging process. When the sensor detects that the pendulum 9 swings greatly, a swinging electrical signal will be generated and transmitted to the controller. The controller determines that the weight 2 has contacted the material surface, and the controller controls the motor 8 to reverse, driving the weight 2 to rise back to the top position. The weight 2 completes a test and retracts to the origin to wait for the next test. At the same time, the sensor can also detect that the pendulum 9 is in a balanced state during the retraction and release of the weight 2, and monitor the movement process of the weight 2. The present application can sensitively monitor the weightless state of the weight hammer 2, and timely control the motor 8 to drive the weight hammer 2 to rise, thereby preventing the weight hammer 2 from being buried and causing damage to the motor 8. The present application can further sense the swing position of the swing rod 9 when the weight hammer 2 is subjected to a large force according to the sensor, and timely understand whether the weight hammer 2 is faulty. If the weight hammer 2 is faulty, the controller will promptly shut down for maintenance, further increasing the robustness of the present application.

[0030] In this embodiment, the drum 6 is further preferably arranged on the left side of the upper end of the mounting plate 4, the hinged end of the swing rod 9 is arranged below the drum 6, the free end of the swing rod 9 is located on the right side of the drum 6, and the measuring wheel 7 is arranged on the left side of the swing limit position at the lower end of the balance wheel 10. The above-mentioned wheel set also includes a guide wheel 20 arranged at the lower left end of the rear side surface of the mounting plate 4, and the wire rope 3 first passes through the guide wheel 20, and then passes through the balance wheel 10 and the measuring wheel 7 in sequence.

[0031] In the present embodiment, a limiting plate 12 is further preferably provided on the rocker arm 9, the left end of the limiting plate 12 is hinged to the hinged end of the rocker arm 9, a tension spring 13 is provided between the right end of the limiting plate 12 and the mounting plate 4, a positioning groove 14 is provided at the right end of the limiting plate 12, and a positioning column 15 is provided on the rocker arm 9, the positioning column 15 is located in the positioning groove 14 and can move in the positioning groove 14.

[0032] In this embodiment, it is further preferred that an upper stop block 16 and a lower stop block 17 are respectively provided on the rear side surface of the mounting plate 4 at the upper and lower sides of the swing rod 9 .

[0033] In this embodiment, the positioning column 15 on the swing rod 9 cooperates with the positioning groove 14 on the limit plate 12, so that the force opposite to the pulling force of the weight 2 is borne by the supporting spring 11 and the tension spring 13 of the limit plate 12, that is, the swing rod 9 uses a double spring to apply force when balancing the pulling force of the weight 2, which reduces the working intensity of the supporting spring 11, and the double spring force can also eliminate the resonance of the spring, thereby increasing the service life of this embodiment. Secondly, when the weight 2 loses weight and causes the swing rod 9 to move, the limit plate 12 remains stationary. When the weight 2 loses weight and the weight 2 is in the process of rising, the swing rod 9 swings rapidly. When the positioning column 15 on the swing rod 9 hits the lower wall of the positioning groove 14 of the limit plate 12, the swing rod 9 can be quickly restored to a balanced state, ensuring the smooth rise of the weight 2.

[0034] The pendulum in this embodiment has four equilibrium positions. The first equilibrium position is as follows: Figure 2 As shown, when the weight 2 is in the process of contraction and lowering, the swing rod 9 is in a balanced position under the action of the weight of the weight 2, the limit plate 12, the tension spring 13 and the supporting spring 11, and the limit plate 12 is in a balanced and immobile state under the action of the tension of the tension spring 13 and the resistance of the upper stop block 16 and the pressure applied by the swing rod 9 through the positioning column 15, and the upper end of the limit plate 12 abuts against the lower end of the upper stop block 16. The positioning column 15 on the swing rod 9 abuts against the lower end of the positioning groove 14.

[0035] The second equilibrium position of the pendulum 9 is as follows Figure 3 As shown, when the weight 2 rises to the top position, the pendulum 9 is in a balanced position under the action of the gravity of the weight 2, the stopping force applied to the weight 2 by the lower end surface of the box body 1, the force applied by the tension spring 13 and the force applied by the supporting spring 11. At this time, because the pendulum 9 is also affected by the force indirectly applied by the lower end surface of the box body 1, the position of the free end of the pendulum 9 will be slightly lower than the position of the pendulum 9 during the retraction and extension process of the weight 2 mentioned above; the limit plate 12 is in a balanced position under the action of the tension of the tension spring 13 and the pressure applied by the pendulum 9 through the positioning column 15, because the limit plate 12 is also affected by the force indirectly applied by the lower end surface of the box body 1. Therefore, when the weight 2 rises to the top position, the pressure applied by the pendulum 9 through the positioning column 15 is greater than the pressure applied by the pendulum 9 through the positioning column 15 during the retraction and extension process of the weight 2 mentioned above, and the free end of the limit plate 12 provided with the positioning groove 14 is slightly lower than the lower end of the upper stop block 16.

[0036] The third equilibrium position of the pendulum 9 is as follows Figure 4As shown, when the weight 2 is buried, the downward pulling force of the wire rope 3 on the balance wheel 10 increases, and the free end of the pendulum rod 9 is pulled downward until the pendulum rod 9 swings to hit the lower stop block 17. The pendulum rod 9 is blocked by the lower stop block 17 and reaches a balanced position. At the same time, the limit plate 12 is pulled down by the pendulum rod 9. The limit plate 12 reaches a balanced position under the action of the pulling force of the weight 2 and the pulling force of the tension spring 13.

[0037] The fourth equilibrium position of the pendulum 9 is as follows Figure 5 As shown, when the wire rope 3 breaks, the pulling force of the weight 2 on the balance wheel 10 is instantly reduced, and the pendulum rod 9 swings upward under the action of the supporting spring 11. The pendulum rod 9 maintains balance when it swings upward and hits the lower end of the upper stop block 16. The limit plate 12 also maintains balance when it hits the bottom of the upper stop block 16 under the action of the tension spring 13 and the upper stop block 16.

[0038] In this embodiment, the sensor is preferably a Hall sensor, because the Hall sensor is sensitive to magnetic fields, has a simple structure, a small size, a wide frequency response, a large output voltage change and a long service life. It is convenient to realize the generation and transmission of automated electrical signals, so that the present application can realize automated control. The Hall sensor includes a magnet 18 arranged at the free end of the swing rod 9, and a Hall circuit board 19 arranged on the front side of the mounting plate 4. The Hall circuit board 19 is provided with a Hall semiconductor chip for sensing the magnet 18 when the swing rod 9 is in different states.

[0039] The structure of the Hall circuit board 19 is as follows Figure 6 As shown, a total of 7 Hall semiconductor chips are arranged on the Hall circuit board 19, and the Hall semiconductor chips are arranged along the movement path of the magnet 18, wherein the Hall semiconductor chip 6-1 is located at the position corresponding to the magnet 18 when the swing rod 9 abuts against the upper stop block 16 after the wire rope 3 breaks, and is used to judge whether the wire rope 3 has a broken fault; the Hall semiconductor chips 6-2, 6-3, and 6-4 are arranged in a top-to-bottom order, and are located on the swing path of the swing rod 9 when the weight 2 loses weight instantly, and are used to judge whether the weight 2 contacts the material surface; the Hall semiconductor chips 6-5 is located at the position corresponding to the magnet 18 when the pendulum 9 reaches the equilibrium position during the retraction and extension of the weight 2, and is used to monitor the movement of the weight 2; the Hall semiconductor chip 6-6 is located at the position corresponding to the magnet 18 when the weight 2 reaches the apex and the pendulum 9 is in the equilibrium position, and is used to determine whether the weight 2 has returned to the apex; the Hall semiconductor chip 6-7 is located at the position corresponding to the magnet 18 when the weight is suddenly subjected to a large downward pulling force, such as when the weight 2 is buried and the pendulum 9 hits the lower stop block 17, and is used to determine whether the weight has a fault.

[0040] In this embodiment, it is further preferred that a side stopper 21 is provided on one side of the measuring wheel 7 around the steel wire rope to prevent the steel wire rope 3 from coming off the wheel when the weight 2 is in a weightless state.

[0041] In the present embodiment, a rope tube 22 is fixedly provided at the lower end of the box body 1, an observation hole is provided on the rope tube 22, and an observation cover 23 for opening and closing the observation hole is provided on the observation hole, and the observation hole facilitates observation and maintenance of the present embodiment.

[0042] Further preferably, a soot blowing device is provided in the box body 1, and the soot blowing device includes a soot blowing pipe 24 fixed in the box body 1, and the upper end of the soot blowing pipe 24 is bent downward. Because this embodiment is used on a silo, that is, working in a dusty environment, it is inevitable that dust will enter the box body 1, and the soot blowing pipe 24 can clean the dust in the box body, further increasing the service life of this embodiment.

[0043] The use process of this embodiment is as follows: when the material surface position needs to be detected, the controller 5 gives the motor 8 a start signal, the motor 8 starts, drives the reel 6 to rotate, releases the wire rope 3, and the weight 2 begins to descend. At this time, the swing rod 9 is kept as above under the action of the weight 2, the tension spring 13, and the supporting spring 11. Figure 2 The balanced position shown. At this time, the magnet 18 on the pendulum 9 just senses the Hall semiconductor chip 6-5, and the Hall circuit board 19 transmits the electrical information of the movement information of the weight 2 to the controller 5, and the controller 5 monitors the movement of the weight 2; when the weight 2 contacts the material surface, the weight 2 loses weight instantly, and the pendulum 9 swings upward instantly. When the magnet 18 on the pendulum 9 senses any one of the Hall semiconductor chips 6-2, 6-3, and 6-4, an electrical signal is generated, and the Hall circuit board 19 transmits the electrical signal to the controller 5. The controller 5 receives the signal and determines that the weight 2 has contacted the material surface. The controller 5 gives the motor 8 a reverse signal, and the motor 8 drives the reel 6 to rotate in the opposite direction, so that the weight 2 rises. In the process of the weight 2 from the weightless state to the stable rise, the pendulum 9 cooperates with the stop between the positioning column 15 and the limit plate 12 to stably and quickly recover to the state as shown. Figure 2 As shown, the weight 2 is in the balanced position of the pendulum 9 during the process of retraction and extension, and the magnet 18 on the pendulum 9 senses the Hall semiconductor chip 6-5 again, and transmits the electrical information of the movement of the weight 2 to the controller 5, and the controller 5 monitors the movement of the weight 2; when the weight 2 rises to the top, the lower end surface of the box 1 applies a stopping force to the weight 2, so that the downward force on the pendulum 9 increases, causing the pendulum 9 to swing downward, and when the magnet 18 on the pendulum 9 senses the Hall semiconductor chip 6-6, an electrical signal is generated, and the Hall circuit board 19 transmits the electrical signal to the controller 5, and the controller 5 receives the electrical signal and determines that the weight has reached the top position, and the controller 5 controls the motor 8 to stop, and the pendulum 9 reaches the top position again. Figure 3The balance position shown, at this time, the weight 2 has risen to the top, completing a detection process, waiting for the next detection. When the weight 2 is buried during the detection process, the weight 2 is subjected to a large force, driving the swing rod 9 to swing downward significantly. When the magnet 18 on the swing rod 9 senses the Hall semiconductor chip 6-7, the Hall circuit board 19 transmits the electrical signal to the controller 5. The controller 5 receives the signal and determines that the weight 2 is subjected to an abnormal force. The controller 5 controls the present embodiment to shut down for maintenance. When the wire rope 3 breaks during the detection process, due to the breakage of the wire rope 3, the swing rod 9 instantly loses the force applied by the weight 2, and swings upward significantly under the action of the tension spring 13 and the support spring 11. When the magnet 18 on the swing rod 9 senses the Hall semiconductor chip 6-1, an electrical signal is generated. The Hall circuit board 19 transmits the electrical signal to the controller 5. The controller 5 receives the electrical signal and determines that the weight 2 is faulty. The controller 5 controls the present embodiment to shut down for maintenance.

[0044] In this embodiment, different Hall semiconductor chips sensed by the swing rod 9 at different positions generate signals of different states, and transmit them to the controller 5 through the Hall control board 19. The controller 5 determines the states of the weight 2, and can timely determine the failure of the weight 2 and perform maintenance in time. This embodiment is reliable, efficient and robust.

[0045] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A weight-type material level meter, comprising a box, a weight, a wire rope connected to the weight, a wheel set wound around the wire rope, and a controller, wherein a mounting plate is arranged in the box, the wheel set is arranged on the rear side of the mounting plate, and the controller is arranged on the front side of the mounting plate, characterized in that: The wheel group includes a drum and a measuring wheel, a motor for driving the drum to rotate is arranged on the front side surface of the mounting plate, a rocker mechanism is hingedly arranged on the rear side surface of the mounting plate, the rocker mechanism includes a rocker, one end of the rocker is hingedly connected to the mounting plate, the other end of the rocker is a free end, a balance wheel is arranged on the free end of the rocker, the rocker is placed in the left and right direction, the rocker mechanism also includes a supporting spring, one end of the supporting spring is connected to the mounting plate, the other end of the supporting spring is connected to the rocker, the wire rope is wound around the drum, passes through the balance wheel and the measuring wheel in sequence, the weight extends from the lower end of the box, a sensor for detecting the state of the rocker is arranged on the mounting plate, and the sensor and the motor are both electrically connected to the controller; The drum is arranged on the left side of the upper end of the mounting plate, the hinged end of the swing rod is arranged below the drum, the free end of the swing rod is located on the right side of the drum, and the measuring wheel is arranged on the left side of the swing limit position of the lowest end of the balance wheel; A limit plate is provided on the swing arm, the left end of the limit plate is hinged to the hinged end of the swing arm, a tension spring is provided between the right end of the limit plate and the mounting plate, a positioning groove is provided at the right end of the limit plate, a positioning column is provided on the swing arm, the positioning column is located in the positioning groove and can move in the positioning groove, the lower end surface of the positioning groove balances the swing arm during the process of retracting and releasing the steel wire rope and when the steel wire rope is fully retracted, and the upper end surface of the positioning groove corresponds to the swing limit limit of the swing arm when the weight hammer is weightless; The positioning column on the swing arm cooperates with the positioning groove on the limit plate, so that the swing arm is subjected to a force opposite to the pulling force of the weight, which is borne jointly by the support spring and the tension spring of the limit plate; when the weight loses weight and causes the swing arm to move, the limit plate remains stationary, and when the weight loss state of the weight ends and the weight rises, the swing arm swings rapidly, and when the positioning column on the swing arm hits the lower wall of the positioning groove of the limit plate, the swing arm quickly returns to a balanced state, ensuring that the weight rises smoothly.

2. The weight type material level meter according to claim 1, characterized in that: The sensor is a Hall sensor, which includes a magnet arranged at the free end of the rocker and a Hall circuit board arranged on the front side of the mounting plate, on which a Hall semiconductor chip for sensing the position of the magnet is arranged.

3. The weight-type material level meter according to claim 2, characterized in that: At least three Hall semiconductor chips are arranged on the Hall circuit board, and the Hall semiconductor chips are arranged along the curved path of the movement of the magnet. Some of the Hall semiconductor chips are located at the position corresponding to the magnet when the wire rope is fully retracted, so as to detect whether the weight has risen to the top position. Some of the Hall semiconductor chips are located at the position corresponding to the magnet during the retraction and release of the wire rope, so as to detect the movement state of the weight. Some of the Hall semiconductor chips are located on the movement path of the magnet when the weight loses weight, so as to detect whether the weight is in a weightless state.

4. The weight-type material level meter according to any one of claims 1 to 3, characterized in that: The wheel set also includes a guide wheel arranged at the lower left end of the rear side surface of the mounting plate. The steel wire rope first passes through the guide wheel and then passes through the balance wheel and the measuring wheel in sequence.

5. The weight-type material level meter according to claim 4, characterized in that: An upper stop block and a lower stop block are respectively arranged on the rear side surface of the mounting plate at the upper and lower sides of the swing rod.

6. The weight type material level meter according to claim 5, characterized in that: A side stopper is arranged on one side of the measuring wheel around the steel wire rope.

7. The weight type material level meter according to claim 6, characterized in that: A rope passing tube is fixedly arranged at the lower end of the box body, an observation hole is arranged on the rope passing tube, and an observation cover for opening and closing the observation hole is arranged on the observation hole.

8. The weight-type material level meter according to claim 7, characterized in that: A soot blowing device is arranged in the box body, and the soot blowing device comprises a soot blowing pipe fixed in the box body, and the upper end of the soot blowing pipe is bent downward.

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