Top drive lifting ring state conversion signal acquisition circuit and detection system

Abstract

The invention relates to the technical field of top drive hanging ring inclination detection, and discloses a top drive hanging ring state conversion signal acquisition circuit and a detection system.The top drive hanging ring state conversion signal acquisition circuit is fixedly arranged on a rod body of a top drive hanging ring and comprises an acquisition module, an output module and a transmitting encoder; the collecting module is connected with the transmitting encoder through the output module, the collecting module comprises a first switch unit and a second switch unit, when the top drive hanging ring is in a safe state, the first switch unit is closed, and when the top drive hanging ring is in a dangerous state, the second switch unit is closed; the output module comprises a state conversion signal output sub-module, a trigger signal sending sub-module, a positive power supply end + VCC and a negative power supply end-VCC. Whether the top drive hanging ring is in a safe state or not can be detected in time, and the safety of well drilling is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of top drive lifting ring inclination detection, and in particular to a top drive lifting ring state change signal acquisition circuit and a detection system. Background Art

[0002] The top drive is an important equipment in modern drilling operations. When drill pipes need to be added or removed, the top drive needs a top drive lifting ring to connect the drill pipes with other equipment. The traditional way is to manually operate the top drive lifting ring, observe the relative position between the top drive lifting ring and other equipment with the naked eye, and then try to adjust the relative position between the top drive lifting ring and other equipment to complete the drill pipe handover step by step. This results in extremely low work efficiency. Since special personnel are required to operate, the labor cost is increased, and this operating condition is also not good for the safety of operators.

[0003] Therefore, how to quickly detect whether the top drive lifting eye is in a safe position is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The invention provides a top drive lifting ring state change signal acquisition circuit and detection system to realize the rapid detection of the top drive lifting ring state change.

[0005] The present invention is achieved through the following technical solutions:

[0006] A top drive lifting ring state change signal acquisition circuit, the top drive lifting ring state change signal acquisition circuit is fixedly arranged on the rod body of the top drive lifting ring,

[0007] It includes a collection module, an output module and a transmission encoder, wherein the collection module is connected to the transmission encoder through the output module, wherein:

[0008] The acquisition module includes a first switch unit and a second switch unit. When the top drive lifting ring is in a safe state, the first switch unit is closed and the second switch unit is disconnected; when the top drive lifting ring is in a dangerous state, the second switch unit is closed and the first switch unit is disconnected.

[0009] The output module includes a state change signal output submodule, a trigger signal sending submodule, a positive power supply terminal +VCC and a negative power supply terminal -VCC. The second switch unit is connected to the trigger signal sending submodule through the state change signal output submodule. The positive power supply terminal +VCC is respectively connected to one end of the first switch unit, the trigger signal sending submodule and one of the input ends of the transmitting encoder. The negative power supply terminal -VCC is respectively connected to the state change signal output submodule, the trigger signal sending submodule and the other input end of the transmitting encoder. The other end of the first switch unit is connected to the state change signal output submodule, and the trigger signal sending submodule is also connected to the control end of the transmitting encoder.

[0010] As an optimization, the state change signal output submodule includes a resistor R * , a polarized capacitor C1, a polarized capacitor C2, a resistor R1, a resistor R2, a resistor R3, a diode D1, and a capacitor C3, wherein one end of the second switch unit is connected in series with the resistor R * The polarized capacitor C1 is connected to the positive electrode of the polarized capacitor C1, the negative electrode of the polarized capacitor C1 is connected to the negative power supply terminal -VCC by connecting the polarized capacitor C2 in series, the negative electrode of the polarized capacitor C1 is connected to the positive electrode of the polarized capacitor C2, and the negative electrode of the polarized capacitor C1 is connected to the trigger signal sending submodule by connecting the diode D1 and the resistor R3 in series in sequence, and the two ends of the resistor R1 are respectively connected to the positive electrode of the diode D1 and the negative power supply terminal -VCC, the two ends of the resistor R2 are respectively connected to the negative electrode of the diode D1 and the negative power supply terminal -VCC, one end of the capacitor C3 is connected to the end of the resistor R3 away from the diode D1, the other end of the capacitor C3 is connected to the negative power supply terminal -VCC, and the negative power supply terminal -VCC is connected to the negative input terminal of the sending encoder as the negative transmitting terminal of the output module for outputting the transmitting signal, and the other end of the second switch unit is connected to the common connection end of the resistor R2 and the resistor R3.

[0011] As an optimization, the trigger signal sending submodule includes a resistor R4, a transistor Q1 and an optocoupler U1, one end of the first switch unit is connected to pin 1 of the optocoupler U1 by connecting the resistor R4 in series, and the end of the resistor R4 away from the optocoupler U1 is connected to the positive power supply terminal +VCC, and at the same time, the positive power supply terminal +VCC is connected to the positive input terminal of the sending encoder as the positive transmitting terminal of the output module for outputting the transmitting signal, and the other end of the first switch unit is connected to the positive input terminal of the transmitting encoder by connecting the resistor R4 in series. *The optical coupler U1 is connected to the positive electrode of the polarized capacitor C1, the pin 2 of the optical coupler U1 is connected to the collector of the transistor Q1, the common connection end of the resistor R3 and the capacitor C3 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the negative power supply terminal -VCC, and the pins 3 and 4 of the optical coupler U1 are respectively connected to the control end of the transmitting encoder as the output ends of the trigger control signal.

[0012] As an optimization, the models of the transmitting encoder include HT12D, TLN101A, DL9445, and PT2262S.

[0013] As an optimization, it also includes a shell fixedly installed on the top drive lifting ring, a PCB board is fixedly connected in the shell, the acquisition module and the output module are arranged on the PCB board, the transmitting encoder is fixedly arranged in the shell or the transmitting encoder is fixedly arranged outside the shell, and also includes a magnet, the magnet is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the shell through a pin shaft.

[0014] As an optimization, the first switch unit includes a reed switch G1 for detecting that the top drive lifting ring is in a neutral state or in a safe tilted state, the second switch unit includes a reed switch G2 for detecting that the top drive lifting ring is in a forward tilted state exceeding a tilt threshold and a reed switch G3 for detecting that the top drive lifting ring is in a backward tilted state exceeding a tilt threshold, and the reed switches G1, G2 and G3 are all two-pin reed switches. When the top drive lifting ring is in a neutral state, the magnet is located directly above the reed switch G1, and on the plane where the top drive lifting ring swings when it changes from a normal state to a tilted state, the reed switch G2 and the reed switch G3 are respectively located on both sides of the reed switch G1.

[0015] As an optimization, the first switch unit and the second switch unit are jointly a normally open and normally closed 3-pin reed switch Y1, the reed switch Y1 includes pin 1, pin 2 and pin 3, wherein the pin 1 and the resistor R * One end of the resistor R2 is connected to the positive power supply terminal +VCC, the pin 3 is connected to the common connection end of the resistor R2 and the resistor R3, and the pin 1 is connected to the moving contact, the pin 2 is connected to the normally open contact, and the pin 3 is connected to the normally closed contact.

[0016] As an optimization, the connecting rod is a lead bar.

[0017] The present invention also discloses a top drive lifting ring tilt detection system, which is characterized by comprising the aforementioned top drive lifting ring tilt detection circuit and a control terminal, wherein the control terminal comprises a receiving decoder, a latch, a controller, an execution terminal and a power supply module, wherein:

[0018] The input end of the receiving decoder is connected to the output end of the transmitting encoder, and is used to receive the encoded transmitting signal sent by the transmitting encoder, and decode the encoded transmitting signal to form a decoded signal;

[0019] The input end of the latch is connected to the output end of the receiving decoder, and the latch is triggered to output a latch signal according to the decoding signal;

[0020] The input end of the controller is connected to the latch, and is used to control whether the execution terminal performs corresponding protection measures according to the latch signal output by the latch.

[0021] As an optimization, the controller includes one or more of a 51 single-chip microcomputer, an ARM microcontroller, an AVR microcontroller, an MSP single-chip microcomputer, or a PIC single-chip microcomputer.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The present invention can timely detect whether the state of the top drive lifting ring has changed, thereby detecting whether the top drive lifting ring is in a safe state, thereby ensuring the safety of drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0025] Figure 1 It is a circuit connection diagram of a top drive lifting ring tilt collection circuit described in the present invention;

[0026] Figure 2 Another circuit connection diagram of a top drive lifting ring tilt collection circuit according to the present invention;

[0027] Figure 3 It is a schematic diagram of the top drive lifting ring changing from a safe state to one of the dangerous states when the reed switch is a 2-pin reed switch;

[0028] Figure 4 It is a schematic diagram of the top drive lifting ring changing from a safe state to another dangerous state when the reed switch is a 2-pin reed switch;

[0029] Figure 5 It is a schematic diagram of the top drive lifting ring changing from a safe state to one of the dangerous states when the reed switch is a 3-pin reed switch;

[0030] Figure 6 It is a schematic diagram of the top drive lifting ring changing from a safe state to another dangerous state when the reed switch is a 3-pin reed switch;

[0031] Figure 7 This is a schematic diagram of one of the gate circuits of a latch;

[0032] Figure 8 Another gate circuit diagram for a latch;

[0033] Fig. 9 This is a module connection diagram of the detection system described in the present invention.

[0034] Marks and corresponding parts names in the attached drawings:

[0035] 1- Top drive lifting ring, 2- Connecting rod, 3- Magnet. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0037] This embodiment 1 provides a top drive lifting ring state change signal acquisition circuit, which is fixedly arranged on the rod body of the top drive lifting ring, and includes an acquisition module, an output module and a transmitting encoder, wherein the acquisition module is connected to the transmitting encoder through the output module,

[0038] The acquisition module includes a first switch unit and a second switch unit. When the top drive lifting ring is in a safe state, the first switch unit is closed and the second switch unit is disconnected; when the top drive lifting ring is in a dangerous state, the second switch unit is closed and the first switch unit is disconnected.

[0039] The output module includes a state change signal output submodule, a trigger signal sending submodule, a positive power supply terminal +VCC and a negative power supply terminal -VCC. The second switch unit is connected to the trigger signal sending submodule through the state change signal output submodule. The positive power supply terminal +VCC is respectively connected to one end of the first switch unit, the trigger signal sending submodule and one of the input ends of the transmitting encoder. The negative power supply terminal -VCC is respectively connected to the state change signal output submodule, the trigger signal sending submodule and the other input end of the transmitting encoder. The other end of the first switch unit is connected to the state change signal output submodule, and the trigger signal sending submodule is also connected to the control end of the transmitting encoder.

[0040] That is, the transmitting encoder is respectively connected to the positive transmitting end, the negative transmitting end and the output end of the trigger control signal of the output module.

[0041] In the present technical scheme, the first switch unit and the second switch unit are used to detect the actual position of the top drive lifting ring, and the state change signal output submodule is used to output a large current for a certain period of time after the state of the top drive lifting ring changes to drive the trigger signal sending submodule to output a trigger signal, and the output current becomes smaller after a certain period of time. After the trigger signal sending submodule receives the large current, the trigger signal sending submodule sends a trigger signal to the transmitting encoder, and the transmitting encoder transmits the encoded transmitting signal after receiving the trigger signal. The transmitting encoder continuously collects and encodes the transmitting signal through the positive transmitting end and the negative transmitting end (the transmitting signal is provided by the positive power supply end +VCC and the negative power supply end -VCC), and transmits the encoded transmitting signal after receiving the trigger signal. Here, the trigger signal sending submodule is equivalent to a remote control switch, and the trigger signal sending submodule receiving a large current is equivalent to giving the remote control switch a force to press the remote control switch. After a certain period of time, since the top drive lifting ring has been in a state, the current output by the state change signal output submodule becomes smaller, so that the trigger signal sending submodule can no longer drive the trigger signal sending submodule to send a trigger signal. At this time, the trigger signal sending submodule no longer sends a trigger signal, so that the trigger signal sending submodule achieves the function of power saving triggering. For example, when the top drive lifting ring changes from a safe state to a dangerous state, the first switch unit is disconnected and the second switch unit is closed; when the top drive lifting ring changes from a dangerous state to a safe state, the first switch unit is closed and the second switch unit is disconnected; and the trigger signal sending submodule outputs a large current to enable the trigger signal sending submodule to send a trigger signal during a period of time when the first switch unit is disconnected and the second switch unit is closed, or during a period of time when the first switch unit is closed and the second switch unit is disconnected.

[0042] As for the "certain time" and "larger current" and "smaller current" here, they can be determined according to the size of the electronic components in the state change signal output submodule and the trigger signal sending submodule. The subsequent content will specifically introduce the working process of the state change signal output submodule and the trigger signal sending submodule.

[0043] The state change information output submodule includes a resistor R * , a polarized capacitor C1, a polarized capacitor C2, a resistor R1, a resistor R2, a resistor R3, a diode D1, and a capacitor C3, wherein one end of the second switch unit is connected in series with the resistor R *The polarized capacitor C1 is connected to the positive electrode of the polarized capacitor C1, the negative electrode of the polarized capacitor C1 is connected to the negative power supply terminal -VCC by connecting the polarized capacitor C2 in series, the negative electrode of the polarized capacitor C1 is connected to the positive electrode of the polarized capacitor C2, and the negative electrode of the polarized capacitor C1 is connected to the trigger signal sending submodule by connecting the diode D1 and the resistor R3 in series in sequence, and the two ends of the resistor R1 are respectively connected to the positive electrode of the diode D1 and the negative power supply terminal -VCC, the two ends of the resistor R2 are respectively connected to the negative electrode of the diode D1 and the negative power supply terminal -VCC, one end of the capacitor C3 is connected to the end of the resistor R3 away from the diode D1, the other end of the capacitor C3 is connected to the negative power supply terminal -VCC, and the negative power supply terminal -VCC is connected to the negative input terminal of the sending encoder as the negative transmitting terminal of the output module for outputting the transmitting signal, and the other end of the second switch unit is connected to the common connection end of the resistor R2 and the resistor R3.

[0044] like Figure 1 As shown, the first switch unit includes a reed switch G1 for detecting that the top drive lifting ring is in a neutral state or in a safe tilt state, and the second switch unit includes a reed switch G2 for detecting that the top drive lifting ring is in a forward tilt state exceeding a tilt threshold and a reed switch G3 for detecting that the top drive lifting ring is in a backward tilt state exceeding a tilt threshold, and the reed switches G1, G2 and G3 are all 2-pin reed switches. The reed switch G2 and the reed switch G3 are arranged in parallel.

[0045] When the top drive lifting ring changes from a dangerous state to a safe state, the reed switch G1 is closed, the reed switches G2 and G3 are disconnected, and the current of the positive power supply terminal +VCC passes through the closed reed switch G1 to the current limiting resistor R * At this time, the polar capacitor C1 is charged. When the polar capacitor C1 is charged, the polar capacitor C2 is also charged. While the polar capacitor C2 is charged, it is discharged through the resistor R1. The resistance value of the resistor R1 is set so that the discharge speed of the polar capacitor C2 is lower than the charging speed, so that the voltage of the positive electrode of the polar capacitor C2 gradually increases. At this time, the positive electrode voltage of the diode D1 gradually increases, so that the diode D1 is turned on. In the process of the positive electrode voltage of the polar capacitor C2 gradually increasing, the current passing through the diode D1 also gradually increases, so that the current output through the current limiting resistor R3 gradually increases, and finally the "large current" is output through the current limiting resistor R3. Set the current limiting resistor R * This can prevent the reed switch from suddenly closing when the state of the top drive lifting ring changes, causing the polar capacitor C1 to charge and discharge too quickly and cause damage to the reed switch.

[0046] The current limiting resistor R3 is provided to prevent the state change signal output submodule from outputting too much current, thereby preventing the subsequent trigger signal sending submodule from being damaged.

[0047] When the top drive lifting ring is continuously in a safe state, the polar capacitor C1 is continuously charged. After the polar capacitor C1 is fully charged, the positive power supply terminal +VCC no longer supplies power to the polar capacitor C1. At this time, the polar capacitor C2 also stops charging, and the current at the positive pole of the polar capacitor C2 flows to the negative power supply terminal -VCC through the resistor R1, so that the polar capacitor C2 is gradually discharged. Since the voltage of the polar capacitor C2 becomes smaller, after a certain period of time, the diode D1 is not turned on, and the output voltage output by the final state change signal output submodule is less than the trigger current of the trigger signal sending submodule (the trigger current can be the control current of the trigger signal sending submodule), until the state change signal output submodule does not output current, that is, when the dangerous state is converted to the normal state, the output current of the state change signal output submodule gradually increases to a certain maximum value, and then changes from the maximum value to 0. Here, the maximum value and the speed of current increase are related to the size of the electronic components in the circuit. This is not the inventive point of the present invention and will not be repeated here.

[0048] When the top drive lifting ring changes from a safe state to a dangerous state, the reed switch G1 is disconnected, and one of the reed switches G2 and G3 is closed. At this time, the current of the positive electrode of the fully charged polarized capacitor C1 passes through the current limiting resistor R * , the closed reed switch G2 or G3 flows to the common connection end of the resistors R2 and R3, wherein a part of the current flows to the negative power supply terminal -VCC through the resistor R2, and the other part of the current is sent to the trigger signal sending submodule as the output current of the state change signal output submodule through the current limiting resistor R3, so that the trigger signal sending submodule outputs a trigger signal, and the output current at this time is the "larger current".

[0049] When the top drive lifting ring continues to be in a dangerous state, the polar capacitor C1 continues to discharge, and the output current of the state change signal output submodule gradually decreases, and finally is less than the trigger current of the trigger signal sending submodule, until the state change signal output submodule stops outputting current.

[0050] The trigger switch submodule includes a resistor R4, a transistor Q1 and an optical coupler U1. One end of the first switch unit is connected to pin 1 of the optical coupler U1 by connecting the resistor R4 in series, and the end of the resistor R4 away from the optical coupler U1 is connected to the positive power supply terminal +VCC. At the same time, the positive power supply terminal +VCC is connected to the positive transmitting terminal of the output module for outputting the transmitting signal. The other end of the first switch unit is connected to the positive power supply terminal +VCC by connecting the resistor R4 in series. *The optical coupler U1 is connected to the positive electrode of the polarized capacitor C1, the pin 2 of the optical coupler U1 is connected to the collector of the transistor Q1, the common connection end of the resistor R3 and the capacitor C3 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the negative power supply terminal -VCC, and the pins 3 and 4 of the optical coupler U1 are respectively used as output ends of the trigger control signal.

[0051] Specifically, the two ends of the reed switch G1 are connected to one end of the resistor R4 and the resistor R * The parallel link of the reed switch G2 and the reed switch G3 is connected, one end of which is connected to the common connection end of the resistor R2 and the resistor R3, and the other end of which is connected to the parallel link of the reed switch G2 and the reed switch G3. * One end of .

[0052] When the state change signal output submodule outputs a "large current", transistor Q1 is turned on, causing the light-emitting diode in the optocoupler to emit light, thereby causing the photosensitive transistor in the optocoupler to output a trigger signal to the transmitting encoder. The "large current" here refers to the trigger current of the trigger signal sending submodule, which refers to the current that can turn on transistor Q1.

[0053] At the same time, by setting the sizes of the electronic components of the two sub-modules, the "certain time" can be made between 1 and 2 seconds, that is, the conduction time of the transistor Q1 is made between 1 and 2 seconds.

[0054] In some embodiments, it also includes a shell fixedly mounted on the top drive lifting ring, a PCB board is fixedly connected inside the shell, the acquisition module and the output module are arranged on the PCB board, the transmitting encoder is fixedly arranged inside the shell or the transmitting encoder is fixedly arranged outside the shell, and also includes a magnet, the magnet is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the shell through a pin. In this embodiment, the magnet is a magnet with strong magnetic properties. More specifically, in order to ensure that the connecting rod is always in a vertical state, the connecting rod is a lead bar. The high density of lead can reduce the possibility of the connecting rod tilting with the swing of the top drive lifting ring.

[0055] That is, the lead bar is rotatably connected to the shell through a pin shaft, and the shell will tilt as the top drive lifting ring tilts (sways), while the lead bar is always in a vertical state.

[0056] As the top drive lifting ring tilts ( Figure 3 , 4 During the process (which can be regarded as swinging left and right with a certain point as the center of a circle), the lead bar is always in a vertical state, that is, as the top drive lifting ring tilts, the relative positions of the magnet and the first switch unit and the second switch unit will change. Figure 3 , 4In the figure, the reed switches G1, G2, and G3 are inside the shell. In order to facilitate the phase position of the reed switches G1, G2, and G3 and the magnet, the projection of the reed switches G1, G2, and G3 on the shell surface is drawn. Figure 5 , 6 The same applies to the middle reed switch Y1.

[0057] More specifically, when the first switch unit is the reed switch G1, and the second switch unit is the reed switch G2 and the reed switch G3, when the top drive lifting ring is in a neutral state, the magnet is located directly above the reed switch G1, and on the plane when the top drive lifting ring swings when it changes from a normal state to an inclined state, the reed switch G2 and the reed switch G3 are respectively located on both sides of the reed switch G1.

[0058] It should be noted that if Figure 3 , 4 As shown in FIG. 1 , when the top drive lifting ring 1 is in the neutral state (vertical state) and within the preset tilt angle, the magnetic field of the magnet only acts on the reed switch G1. At this time, the reed switch G1 is closed, and the reed switches G2 and G3 are disconnected. The top drive lifting ring is in a safe state. Figure 3 , 4 When the top drive lifting ring swings in the direction shown (the top drive lifting ring can only swing in one plane, that is, Figure 3 , 4 The figure shown can only swing left and right, but not vertically. Figure 3 , 4 The magnetic field of the magnet only acts on the reed switch G2 or G3, and the top drive lifting ring is in a dangerous state. Figure 3 , 4 In the attached drawings shown, the top drive lifting ring can only swing left and right, therefore, the reed switches G2 and G3 are located on the left and right sides of the reed switch G1, and the specific positions of the reed switches G2 and G3 are related to the preset tilt angle and the magnetism of the magnet, and the preset tilt angle and the magnetism of the magnet can be set according to actual operation requirements, which is not the inventive point of the present invention and will not be elaborated here.

[0059] When the top drive lifting ring is in a safe state, the reed switch G1 is in the magnetic field generated by the magnet and the reed switch G2 / G3 is not in the magnetic field generated by the magnet, so that the magnet controls the reed switch G1 to close; when the top drive lifting ring is in a dangerous state, the reed switch G2 / G3 is closed and is in the magnetic field generated by the magnet and the reed switch G1 is not in the magnetic field generated by the magnet, so that the magnet controls the reed switch G2 / G3 to close.

[0060] The specific installation positions of the magnet and the lead bar are set according to the actual situation, as long as the lifting ring is in a safe state, the magnetic field generated by the magnet only acts on the reed switch G1; the lifting ring is in a set dangerous state, the magnetic field generated by the magnet only acts on the reed switch G2 or G3, and the lead bar is parallel to the swinging plane of the top drive lifting ring.

[0061] Here, the swing surface is Figure 3 , 4 The plane where the top drive lifting ring in 5 and 6 swings left and right is the xy plane, and the shell also swings on the xy plane along with the swing of the top drive lifting ring.

[0062] Embodiment 2:

[0063] Different from Example 1, Figure 2 As shown, the first switch unit and the second switch unit are a normally open normally closed 3-pin reed switch Y1, the reed switch Y1 includes pin 1, pin 2 and pin 3, wherein the pin 1 is connected to the resistor R * One end of the reed switch Y1 is connected, the pin 2 is connected to the positive power supply terminal +VCC, the pin 3 is connected to the common connection end of the resistor R2 and the resistor R3, and the pin 1 is connected to the moving contact, the pin 2 is connected to the normally open contact, and the pin 3 is connected to the normally closed contact. The first switch unit is equivalent to pin 1 and pin 2 of the reed switch Y1, and the second switch unit is equivalent to pin 1 and pin 3 of the reed switch Y1. Pin 3 is the normally closed end, that is, when there is no external force, pin 1 and pin 3 are in contact, and pin 1 and pin 2 are not in contact, that is, when the top drive lifting ring is in a dangerous state, the magnetic field of the magnet does not act on the reed switch Y1. At this time, pin 2 of the reed switch Y1 is located directly below the magnet. In other words, if Figure 5 , 6 As shown, when the top drive lifting ring is in a safe state, the pin 1 of the reed switch Y1 contacts the pin 2 of Y1 under the action of the magnet, so that the pin 1 of Y1 is disconnected from the pin 3 of Y1. When the top drive lifting ring changes from a safe state to a dangerous state, the magnet no longer acts on the pin 2, so the pin 1 will contact the pin 3. The 2-pin reed switch and the normally open and normally closed 3-pin reed switch Y1 can use any reed switch on the market, which will not be described here.

[0064] It should be noted that the safe state is when the top drive lifting ring is in a vertical state or the tilt angle is within the safe range, the system recognizes it as a safe state. The dangerous state is when the tilt angle of the top drive lifting ring exceeds the preset safety threshold, especially when it approaches or reaches the angle that may hit the second-floor platform or other equipment, the system will recognize it as a dangerous state and trigger corresponding safety measures, such as issuing a warning or automatically starting the brake system to prevent accidents.

[0065] In summary, in Example 1 and Example 2, as long as the state of the top drive lifting ring changes, the output module will output a trigger signal for a certain period of time to trigger the transmitting encoder to transmit a signal, and after the state of the top drive lifting ring remains unchanged, the output module will no longer output a trigger signal, and the state trigger mode is used to enable the entire acquisition circuit to achieve the function of power saving triggering.

[0066] Embodiment 3 further discloses a top drive lifting ring inclination detection system, comprising a top drive lifting ring state change signal acquisition circuit and a control terminal as described in Embodiment 1 or 2, wherein the control terminal comprises a receiving decoder, a latch, a controller, an execution terminal and a power supply module, wherein:

[0067] The input end of the receiving decoder is connected to the output end of the transmitting encoder, and is used to receive the encoded transmitting signal sent by the transmitting encoder, and decode the encoded transmitting signal to form a decoded signal;

[0068] When the top drive lifting ring undergoes different state changes, the signal size emitted by the transmitting encoder is the same (all provided by the positive power supply end).

[0069] The input end of the latch is connected to the output end of the receiving decoder, and the latch is triggered to output a latch signal according to the decoding signal;

[0070] The input end of the controller is connected to the latch, and is used to control whether the execution terminal performs corresponding protection measures according to the latch signal output by the latch.

[0071] In this embodiment, the latch only outputs two latch signals, one latch signal is to make the controller control the execution terminal to execute the corresponding protection measures, and the other latch signal is to make the controller not control the execution terminal to execute the corresponding protection measures. For example, A signal and B signal, A signal is to make the controller control the execution terminal to execute the corresponding protection measures, and B signal is to make the controller not control the execution terminal to execute the corresponding protection measures.

[0072] When the latch continuously outputs the A signal, if the receiving decoder sends a decoding signal to the latch, the latch is converted to continuously output the B signal; when the latch continuously outputs the B signal, if the receiving decoder sends a decoding signal to the latch, the latch is converted to continuously output the A signal.

[0073] The specific structure of the latch can be as follows Figure 7 , 8 shown.

[0074] It includes NAND gates A1 and A2, OR gate A3 and NAND gate A4, one of the input ends of NAND gate A1 and the input end of the NAND gate are connected to the output end of the decoding receiver, the output end of NAND gate A1 is respectively connected to the two input ends of NAND gate A2, and the output end of NAND gate A2 is connected to one of the input ends of the OR gate, the other input end of the OR gate is connected to the output end of the NAND gate, the output end of the OR gate is connected to the other input end of NAND gate A1, and the output end of NAND gate A1 is also connected to the controller. Of course, NAND gate A2 can also be changed to OR gate A5.

[0075] That is, in fact, the latch may also be an existing model, such as a JK latch or a D latch.

[0076] The corresponding protection measures include warning or braking, that is, the execution terminal can be one or more of the alarm or braking system.

[0077] The controller includes one or more of a 51 single-chip microcomputer, an ARM microcontroller, an AVR microcontroller, an MSP single-chip microcomputer, or a PIC single-chip microcomputer.

[0078] That is, the structure of the detection system is as follows Fig. 9 As shown, specifically:

[0079] The acquisition module is electrically connected to the transmitting encoder through the output module in turn, the transmitting encoder is communicatively connected to the receiving decoder, and the receiving encoder is electrically connected to the execution terminal through the latch and the controller in turn. The power supply module supplies power to the controller.

[0080] When the lifting ring is in the neutral position, forward tilt or backward tilt state, the power-saving triggering "circuit" and the angle sampling "probe" cooperate with each other to complete the automatic output "transmission" of the simulated "working condition" of the remote control "button".

[0081] The wireless receiver in the host works in the "self-locking" mode, so that the two states of the lifting ring, namely, neutral safety and tipping danger, can be automatically detected and identified by logical judgment.

[0082] It should be noted that the resistors, capacitors, diodes, transistors, optical couplers, controllers, transmitting encoders, and receiving decoders in the present invention all use existing models, which will not be described in detail here. For example, the transmitting encoder can use 838B-MBF-J, and the receiving decoder can use SC2272-M4 and MS8416T.

[0083] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A top drive lifting ring state change signal acquisition circuit, the top drive lifting ring state change signal acquisition circuit is fixedly arranged on the rod body of the top drive lifting ring, characterized in that: It includes a collection module, an output module and a transmission encoder, wherein the collection module is connected to the transmission encoder through the output module, wherein: The acquisition module includes a first switch unit and a second switch unit. When the top drive lifting ring is in a safe state, the first switch unit is closed and the second switch unit is disconnected; when the top drive lifting ring is in a dangerous state, the second switch unit is closed and the first switch unit is disconnected. The output module includes a state change signal output submodule, a trigger signal sending submodule, a positive power supply terminal +VCC and a negative power supply terminal -VCC. The second switch unit is connected to the trigger signal sending submodule through the state change signal output submodule. The positive power supply terminal +VCC is respectively connected to one end of the first switch unit, the trigger signal sending submodule and one of the input ends of the transmitting encoder. The negative power supply terminal -VCC is respectively connected to the state change signal output submodule, the trigger signal sending submodule and the other input end of the transmitting encoder. The other end of the first switch unit is connected to the state change signal output submodule, and the trigger signal sending submodule is also connected to the control end of the transmitting encoder.

2. A top drive lifting ring tilt detection circuit according to claim 1, characterized in that: The state change signal output submodule includes a resistor R * , a polarized capacitor C1, a polarized capacitor C2, a resistor R1, a resistor R2, a resistor R3, a diode D1, and a capacitor C3, wherein one end of the second switch unit is connected in series with the resistor R * The polarized capacitor C1 is connected to the positive electrode of the polarized capacitor C1, the negative electrode of the polarized capacitor C1 is connected to the negative power supply terminal -VCC by connecting the polarized capacitor C2 in series, the negative electrode of the polarized capacitor C1 is connected to the positive electrode of the polarized capacitor C2, and the negative electrode of the polarized capacitor C1 is connected to the trigger signal sending submodule by connecting the diode D1 and the resistor R3 in series in sequence, and the two ends of the resistor R1 are respectively connected to the positive electrode of the diode D1 and the negative power supply terminal -VCC, the two ends of the resistor R2 are respectively connected to the negative electrode of the diode D1 and the negative power supply terminal -VCC, one end of the capacitor C3 is connected to the end of the resistor R3 away from the diode D1, the other end of the capacitor C3 is connected to the negative power supply terminal -VCC, and the negative power supply terminal -VCC is connected to the negative input terminal of the sending encoder as the negative transmitting terminal of the output module for outputting the transmitting signal, and the other end of the second switch unit is connected to the common connection end of the resistor R2 and the resistor R3.

3. A top drive lifting ring tilt detection circuit according to claim 2, characterized in that: The trigger signal sending submodule includes a resistor R4, a transistor Q1 and an optical coupler U1, one end of the first switch unit is connected to the pin 1 of the optical coupler U1 by connecting the resistor R4 in series, and the end of the resistor R4 away from the optical coupler U1 is connected to the positive power supply terminal +VCC, and at the same time, the positive power supply terminal +VCC is connected to the positive input terminal of the sending encoder as the positive transmitting terminal of the output module for outputting the transmitting signal, and the other end of the first switch unit is connected to the positive input terminal of the transmitting encoder by connecting the resistor R4 in series. * The optical coupler U1 is connected to the positive electrode of the polarized capacitor C1, the pin 2 of the optical coupler U1 is connected to the collector of the transistor Q1, the common connection end of the resistor R3 and the capacitor C3 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the negative power supply terminal -VCC, and the pins 3 and 4 of the optical coupler U1 are respectively connected to the control end of the transmitting encoder as the output ends of the trigger control signal.

4. A top drive lifting ring tilt detection circuit according to claim 3, characterized in that: It also includes a shell fixedly mounted on the top drive lifting ring, a PCB board fixedly connected inside the shell, the acquisition module and the output module are arranged on the PCB board, the transmitting encoder is fixedly arranged inside the shell or the transmitting encoder is fixedly arranged outside the shell, and also includes a magnet, the magnet is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the shell through a pin shaft.

5. A top drive lifting ring tilt detection circuit according to claim 4, characterized in that: The first switch unit includes a reed switch G1 for detecting that the top drive lifting ring is in a neutral state or a safe tilting state, the second switch unit includes a reed switch G2 for detecting that the top drive lifting ring is in a forward tilting state exceeding a tilting threshold and a reed switch G3 for detecting that the top drive lifting ring is in a backward tilting state exceeding a tilting threshold, and the reed switches G1, G2 and G3 are all two-pin reed switches. When the top drive lifting ring is in a neutral state, the magnet is located directly above the reed switch G1, and on the plane where the top drive lifting ring swings when it changes from a normal state to a tilted state, the reed switch G2 and the reed switch G3 are respectively located on both sides of the reed switch G1.

6. A top drive lifting ring tilt detection circuit according to claim 4, characterized in that: The first switch unit and the second switch unit are a normally open normally closed 3-pin reed switch Y1, the reed switch Y1 includes pin 1, pin 2 and pin 3, wherein the pin 1 and the resistor R * One end of the resistor R2 is connected to the positive power supply terminal +VCC, the pin 3 is connected to the common connection end of the resistor R2 and the resistor R3, and the pin 1 is connected to the moving contact, the pin 2 is connected to the normally open contact, and the pin 3 is connected to the normally closed contact.

7. A top drive lifting ring tilt detection circuit according to claim 4, characterized in that: The connecting rod is a lead strip.

8. A top drive lifting ring tilt detection circuit according to claim 1, characterized in that: The models of the transmitting encoder include HT12D, TLN101A, DL9445, and PT2262S.

9. A top drive lifting ring tilt detection system, characterized in that: A top drive lifting ring tilt detection circuit and a control terminal according to any one of claims 1 to 8, wherein the control terminal comprises a receiving decoder, a latch, a controller, an execution terminal and a power module, wherein: The input end of the receiving decoder is connected to the output end of the transmitting encoder, and is used to receive the encoded transmitting signal sent by the transmitting encoder, and decode the encoded transmitting signal to form a decoded signal; The input end of the latch is connected to the output end of the receiving decoder, and the latch is triggered to output a latch signal according to the decoding signal; The input end of the controller is connected to the latch and is used to control whether the execution terminal performs corresponding protection measures according to the latch signal output by the latch.

10. A top drive lifting ring tilt detection circuit according to claim 8, characterized in that: The controller includes one or more of a 51 single-chip microcomputer, an ARM microcontroller, an AVR microcontroller, an MSP single-chip microcomputer, or a PIC single-chip microcomputer.

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