A method for processing the load signal of a hydraulic elevating bowl

Abstract

The present invention relates to a method for processing the load signal of a hydraulic elevating slip. The hydraulic elevating slip used in the method comprises: a slip body and a door body, which are hinged to switch between an open state and a closed state; a movable insert installed on the door body, the movable insert being capable of moving up and down between a first position and a second position, and the movable insert being capable of moving from the first position to the second position under the action of a drill string, a load detection device being used for detecting the position of the movable insert; a control device being used for controlling the opening and closing of the door body and for receiving and processing the detection signal of the load detection device; the method comprising: when the door body and the slip body are in the closed state and the load detection device detects that the insert is in the second position, the control device instructs the driller that the drill string is in place. The present invention detects the position of the movable insert through the load detection device, and conveys the result of the detected position of the movable insert to the control device, and the control device judges whether the drill string is in place, so that the driller can perform subsequent operations.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drilling, and particularly to a method for processing a load signal of a hydraulic elevator Background Art

[0002] At present, oil drilling is developing towards the direction of automation, and the requirements for the feedback signals of hydraulic elevators are getting higher and higher to meet the linkage requirements of the automated drilling system. The existing hydraulic elevators do not have a load feedback function. When the driller controls the drilling operation, it is impossible to accurately obtain the load information of the elevator, and it is impossible to confirm whether the elevator has completely caught the drill pipe. Especially when the hydraulic elevator is operating at a high altitude, the driller must use other auxiliary means (such as monitoring equipment) to determine whether the elevator has completely caught the drill pipe. However, the existing means are greatly affected by the environment, and their performance will decline or even become unusable in rainy days, foggy days or extremely cold conditions. This not only reduces the operation efficiency, but also poses a safety hazard. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a method for processing a load signal of a hydraulic elevator, which solves the technical problem that the load feedback signal of the hydraulic elevator is greatly affected by the environment, resulting in unstable load feedback signals.

[0005] (II) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] A method for processing a load signal of a hydraulic elevator, wherein the hydraulic elevator used in the method includes:

[0008] An elevator body and a door body, which are hinged to switch between an open state and a closed state;

[0009] A plurality of bushings, which are respectively installed on the elevator body and the door body. In the closed state, the plurality of bushings on the door body and the elevator body can enclose a cylinder to place the drill pipe;

[0010] Among them, the plurality of bushings include a movable bushing installed on the door body, and the movable bushing can move up and down between a first position and a second position. The movable bushing can move from the first position to the second position under the action of the drill pipe, and when the drill pipe is removed, the movable bushing can move from the second position to the first position;

[0011] A load detection device for detecting the position of the movable bushing;

[0012] A control device for controlling the opening and closing of the door body and for receiving and processing the detection signals of the load detection device;

[0013] The method includes: when the door body and the elevator body are in the closed state and the load detection device detects that the movable bushing is in the second position, the control device instructs the driller that the drill string is in place.

[0014] Preferably, the method specifically includes the following steps:

[0015] S1. The control device detects whether the door body and the elevator body are in the closed state;

[0016] S2. If the control device detects that the door body and the elevator body are in the open state, the control device determines that the drill string is not in place;

[0017] If the control device detects that the door body and the elevator body are in the closed state, the load detection device detects the position of the movable bushing. When it detects that the movable bushing is in the second position, the load detection device is triggered, and the load detection device transmits a trigger signal to the control device. The control device instructs the driller that the drill string is in place; otherwise, the control device instructs the driller that the drill string is not in place.

[0018] Preferably, the load detection device includes a trigger rod and a load indicating mechanism;

[0019] The trigger rod has an initial position and a trigger position. The trigger rod can rotate between the initial position and the trigger position as the movable bushing moves. When the movable bushing is in the second position, the trigger rod rotates to the trigger position to trigger the load indicating mechanism. The load indicating mechanism transmits a trigger signal to the control device, and the control device instructs the driller that the drill string is in place; otherwise, the control device instructs the driller that the drill string is not in place.

[0020] Preferably, the load indicating mechanism includes a directional control valve;

[0021] The directional control valve has a first working position and a second working position. The trigger rod is used to switch the directional control valve between the first working position and the second working position;

[0022] When the trigger rod is in the initial position, the directional control valve is in the first working position, the load indicating mechanism is not triggered, and the control device instructs the driller that the drill string is not in place;

[0023] When the trigger lever is in the trigger position, the reversing valve is in the second working position, and the load indicating mechanism transmits a trigger signal to the control device, which instructs the driller that the drill string is in place.

[0024] Preferably, the load indicating mechanism further includes a pressure sensor;

[0025] The pressure sensor is communicated with the oil discharge end of the reversing valve through an oil pipe. The oil inlet end of the reversing valve is communicated with the oil inlet oil path, and the oil return end of the reversing valve is communicated with the oil return oil path;

[0026] When the trigger lever is in the initial position, the reversing valve is in the first working position. The hydraulic oil in the oil inlet oil path cannot enter the pressure sensor, and the pressure of the hydraulic oil detected by the pressure sensor cannot reach the set value. The pressure sensor transmits a pressure signal to the control device to indicate that the drill string is not in place;

[0027] When the trigger lever is in the trigger position, the reversing valve is in the second working position. The hydraulic oil in the oil inlet oil path can enter the pressure sensor through the reversing valve and the oil pipe. After the pressure of the hydraulic oil detected by the pressure sensor reaches the set value, it transmits a pressure signal to the control device to indicate that the drill string is in place.

[0028] Preferably, the pressure sensor is an explosion-proof pressure sensor.

[0029] Preferably, the load detection device further includes:

[0030] A transmission shaft that can move up and down with the movable bushing;

[0031] A lever that can drive the trigger lever to deflect. The middle of the lever is rotatably connected to the door body. One end of the lever is hinged to the transmission shaft at the top, and a pin shaft is installed at the top of the other end. The top end of the pin shaft can extend into the door body;

[0032] A return spring for driving the lever to drive the trigger lever to rotate from the trigger position to the initial position is sleeved on the pin shaft. The top end of the return spring abuts against the door body, and the bottom end abuts against the lever;

[0033] The movable bushing moves downward under the action of the drill string to drive the transmission shaft to move downward. The transmission shaft drives the lever and the trigger lever to deflect to the trigger position. The return spring is compressed and stores energy. The trigger lever pushes the reversing valve to the second working position. The hydraulic oil in the oil inlet oil path enters the pressure sensor through the reversing valve and the oil pipe. After the pressure of the hydraulic oil detected by the pressure sensor reaches the set value, it transmits a pressure signal to the control device to indicate that the drill string is in place;

[0034] After the drill tool is removed from the hydraulic elevator chuck, under the action of the return spring, the lever drives the trigger rod to deflect from the trigger position to the initial position, the reversing valve is switched from the second working position to the first working position, the hydraulic oil in the oil inlet circuit cannot enter the pressure sensor, the pressure of the hydraulic oil detected by the pressure sensor cannot reach the set value, and the pressure sensor transmits a pressure signal to the control device to indicate that the drill tool is not in place.

[0035] Preferably, it further includes a display screen for displaying whether the drill tool is in place, and the display screen is electrically connected to the control device.

[0036] Preferably, it further includes a protective cover for protecting the reversing valve;

[0037] The reversing valve is installed at the bottom end of the elevator chuck body, the protective cover is installed at the bottom end of the reversing valve, and the protective cover is connected to the door body.

[0038] (III) Beneficial Effects

[0039] The beneficial effects of the present invention are as follows:

[0040] (1) The present invention detects the position of the movable bushing through the load detection device, and transmits the result of the detected position of the movable bushing to the control device, and the control device judges whether the drill tool is in place, so that the driller can perform subsequent operations.

[0041] (2) The present invention makes the reversing valve in the first working position or the second working position through the deflection of the trigger rod, so that the hydraulic oil flows out or enters the pressure sensor, and the control device judges whether the drill tool is in place according to whether the pressure measured by the pressure sensor reaches the set value.

[0042] (3) The present invention judges the position of the movable bushing through the transmission shaft, the trigger rod, the reversing valve, the oil pipe and the pressure sensor, and converts it into a pressure signal and transmits it to the control device to judge whether the drill tool is in place. The detection is carried out by a combination of mechanical and hydraulic means, making the measurement result more accurate. Description of the Drawings

[0043] Figure 1 It is a schematic diagram of the overall structure of the hydraulic elevator chuck of the present invention;

[0044] Figure 2 It is an exploded view of the hydraulic elevator chuck of the present invention;

[0045] Figure 3 It is a combined schematic diagram of the transmission shaft, the lever and the reversing valve of the present invention;

[0046] Figure 4Schematic combination diagram of the reducing bushing, transmission shaft, lever and reversing valve of the present invention;

[0047] Figure 5 Schematic oil circuit connection diagram of the elevator body, reversing valve and pressure sensor of the present invention;

[0048] Figure 6 Flow chart of the present invention.

[0049]

Description of the reference numerals

[0050] 1: Elevator body; 2: Reducing bushing; 3: Door body; 4: Reversing valve; 5: Transmission shaft; 6: Return spring; 7: Pin shaft; 8: Lever; 9: Protective cover; 13: Pressure sensor; 81: Trigger rod. Detailed implementation manners

[0051] For better explaining the present invention and facilitating understanding, the present invention will be described in detail below in conjunction with the drawings through specific implementation manners.

[0052] Embodiment 1

[0053] As Figure 1 and 2 shown, a hydraulic elevator includes an elevator body 1, a door body 3, a plurality of reducing bushings 2, a load detection device and a control device; the control device is used to control the opening and closing of the door body and to receive and process the detection signal of the load detection device; the door body 3 is hinged to the elevator body 1 to switch between an open state and a closed state.

[0054] As Figure 2 shown, the door body 3 includes a left door and a right door respectively hinged to the elevator body 1. When the left door and the right door are closed, they fix the drill pipe. When the left door and the right door are separated, the drill pipe is released. Among them, both the left door and the right door are connected to the elevator body 1 through a hydraulic door body control mechanism, and the separation or closing of the left door and the right door is achieved through the door body control mechanism. The control device separates or closes the left door and the right door through the door body control mechanism.

[0055] In the present invention, the elevator body 1 is an arc-shaped structure with an open side, and both the left door and the right door are also arc-shaped structures with open sides. In the closed state, the elevator body 1, the left and right doors form a cylindrical space. In the open state, the left door and the right door are separated and rotated, and the side of the elevator body 1 is open.

[0056] As Figure 1 and 2As shown, multiple bushings 2 are respectively installed on the elevator body 1 and the door body 3. When the door body 3 is closed, the multiple bushings 2 can enclose to form a cylinder for placing the drill pipe. Among them, the multiple bushings 2 include a movable bushing installed on the door body. The movable bushing can move up and down between a first position and a second position. Under the action of the drill pipe, the movable bushing can move from the first position to the second position. After the drill pipe is removed, the movable bushing can move from the second position to the first position. When the drill pipe is removed, the movable bushing can move from the second position to the first position.

[0057] This embodiment includes four bushings 2, two of which are installed on the elevator body 1, one is installed on the left door, and the other is installed on the right door. The bushing 2 installed on the right door is the movable bushing.

[0058] As Figure 3 and 4 shown, the load detection device is used to detect the position of the movable bushing, and convey the detection data to the control device by detecting the position of the movable bushing, so as to assist the control device to judge whether the drill pipe is in place. The load detection device includes a trigger rod 81 and a load indicating mechanism; the trigger rod 81 has an initial position and a trigger position. The trigger rod 81 can rotate between the initial position and the trigger position as the movable bushing moves. When the movable bushing is in the second position, the trigger rod 81 triggers the load indicating mechanism. The load indicating mechanism generates a trigger signal and transmits the trigger signal to the control device. The control device instructs the driller that the drill pipe is in place, otherwise the control device instructs the driller that the drill pipe is not in place. In the present invention, the drill pipe being in place means that the drill pipe is placed into the cylinder, and the drill pipe not being in place means that the drill pipe is not placed into the cylinder.

[0059] As Figure 4 shown, the load indicating mechanism includes a reversing valve 4; the reversing valve 4 has a first working position and a second working position. The trigger rod 81 is used to switch the reversing valve 4 between the first working position and the second working position; when the trigger rod 81 is in the initial position, the reversing valve 4 is in the first working position, and the load indicating mechanism is not triggered. The control device instructs the driller that the drill pipe is not in place; when the trigger rod 81 is in the trigger position, the reversing valve 4 is in the second working position, and the load indicating mechanism is triggered. The load indicating mechanism conveys the trigger signal to the control device, and the control device instructs the driller that the drill pipe is in place.

[0060] In this embodiment, the reversing valve 4 is a mechanical two-position three-way reversing valve.

[0061] As Figure 5As shown, further, the load indicating mechanism further includes a pressure sensor 13; the pressure sensor 13 is an explosion-proof pressure sensor. The pressure sensor 13 is communicated with the oil discharging end of the reversing valve 4 through an oil pipe. The oil inlet end of the reversing valve 4 is communicated with the oil inlet oil circuit, and the oil return end of the reversing valve 4 is communicated with the oil return oil circuit. Among them, the oil inlet oil circuit refers to the oil circuit that can be communicated with the hydraulic station for supplying hydraulic oil, and the oil return oil circuit refers to the oil circuit that can be communicated with the oil return tank. When the trigger rod 81 is in the initial position, the reversing valve 4 is in the first working position, and the hydraulic oil in the oil inlet oil circuit cannot enter the pressure sensor 13, and the pressure of the hydraulic oil detected by the pressure sensor 13 cannot reach the set value. The pressure sensor 13 transmits the pressure signal to the control device, and the control device indicates that the drill tool is not in place; when the trigger rod 81 is in the trigger position, the reversing valve 4 is in the second working position, and the hydraulic oil in the oil inlet oil circuit can enter the pressure sensor 13 through the reversing valve 4 and the oil pipe. After the pressure sensor 13 detects that the pressure of the hydraulic oil reaches the set value, it transmits the pressure signal to the control device, and the control device indicates that the drill tool is in place. In the present invention, the deflection of the trigger rod 81 makes the reversing valve 4 in the first working position or the second working position, so that the hydraulic oil enters or flows out of the pressure sensor 13. The pressure sensor 13 judges whether the drill tool is in place according to whether the measured pressure reaches the set value.

[0062] The pressure signal is the trigger signal of the load indicating mechanism.

[0063] As Figure 3 and 4 shown, the load detection device further includes: a transmission shaft 5 that can move up and down with the moving bushing; a lever 8 that can drive the trigger rod 81 to deflect. The middle of the lever 8 is rotatably connected to the door body 3. One end of the lever 8 is hinged to the transmission shaft 5 at the top, and a pin shaft 7 is installed at the top of the other end. The top end of the pin shaft 7 can extend into the door body 3; a return spring 6 for driving the lever 8 to drive the trigger rod 81 to rotate from the trigger position to the initial position is sleeved on the pin shaft 7. The top end of the return spring 6 abuts against the door body 3, and the bottom end abuts against the lever 8; the moving bushing moves down under the action of the drill tool to drive the transmission shaft 5 to move down. The transmission shaft 5 drives the lever 8 and the trigger rod 81 to deflect to the trigger position. The return spring 6 is compressed and stores energy. The trigger rod 81 pushes the reversing valve 4 to the second working position, and the hydraulic oil in the oil inlet oil circuit enters the pressure sensor 13 through the reversing valve 4 and the oil pipe. After the pressure sensor 13 detects that the pressure of the hydraulic oil reaches the set value, it transmits the pressure signal to the control device, and the control device compares the pressure signal with the preset value. When the pressure signal is greater than the preset value, the control device indicates that the driller's drill tool is in place.

[0064] After the drill string is removed from the hydraulic elevator, under the action of the return spring 6, the lever 8 drives the trigger rod 81 to deflect from the trigger position to the initial position. The directional control valve 4 is switched from the second working position to the first working position. The hydraulic oil in the oil inlet circuit cannot enter the pressure sensor 13, and the pressure of the hydraulic oil detected by the pressure sensor 13 cannot reach the set value. The pressure sensor 13 transmits the pressure signal to the control device, and the control device compares the pressure signal with the preset value. When the pressure signal is less than the preset value, the control device indicates to the driller that the drill string is not in place.

[0065] In the present invention, the trigger rod 81 is placed at the bottom end of the lever 8 and near one end of the transmission shaft 5. The trigger rod 81 is inclined from the upper end to the lower end from the middle of the lever 8 towards the transmission shaft 5. The directional control valve 4 is placed at the lower end of the lever 8. When the transmission shaft 5 moves downward, the lever 8 drives the trigger rod 81 to deflect downward and pushes the directional control valve 4 to change its direction.

[0066] The present invention determines the position of the movable patch core through the transmission shaft, trigger rod, directional control valve, oil pipe and pressure sensor, and converts it into a pressure signal to be transmitted to the control device to determine whether the drill string is in place. The detection is carried out by a combination of mechanical and hydraulic methods, making the measurement result more accurate.

[0067] Preferably, it further includes a display screen for displaying whether the drill string is in place. The display screen is electrically connected to the control device. After receiving the pressure signal from the pressure sensor 13, the control device compares it with the preset pressure value. When the pressure signal received by the control device is greater than the preset pressure value, the control device transmits the signal that the drill string is in place to the display screen and displays that the drill string is in place; when the pressure signal received by the control device is less than the preset pressure value, the control device transmits the signal that the drill string is not in place to the display screen and displays that the drill string is not in place.

[0068] As Figure 4 shown, preferably, it further includes a protective cover 9 for protecting the directional control valve 4; the directional control valve 4 is installed at the bottom end of the elevator body 1, the protective cover 9 is installed at the bottom end of the directional control valve 4, and the protective cover 9 is connected to the door body.

[0069] Embodiment 2

[0070] As Figure 6 shown, this embodiment provides a method for processing the load signal of the hydraulic elevator using the above-mentioned hydraulic elevator, including that when the control device detects that the door body 3 and the elevator body 1 are in the closed state and the load detection device detects that the movable patch core is in the second position, it indicates to the driller that the drill string is in place.

[0071] The present invention detects the position of the movable patch core through the load detection device, and the control device determines whether the drill string is in place according to the position of the movable patch core detected by the load detection device, so that the driller can perform subsequent operations.

[0072] Further, it includes the following steps:

[0073] S1. The control device detects whether the door body 3 and the hanger body 1 are in the closed state;

[0074] S2. If the control device detects that the door body 3 and the hanger body 1 are in the open state, the control device determines that the drill string is not in place.

[0075] If the control device detects that the door body 3 and the hanger body 1 are in the closed state, the load detection device detects the position of the movable filling core. When it detects that the movable filling core is in the second position, the load detection device transmits the position of the movable filling core to the control device, and the control device instructs the driller that the drill string is in place; otherwise, the control device instructs the driller that the drill string is not in place.

[0076] The present invention detects the position of the movable filling core through the load detection device, and transmits the result of the detected position of the movable filling core to the control device, so as to assist the control device to judge whether the drill string is in place, so that the driller can perform subsequent operations.

[0077] Specifically, after the drill string is placed in the cylinder, when the hydraulic hanger lifts or lowers the drill string, the movable filling core moves downward under the action of the drill string, so as to drive the transmission shaft 5 to move downward. The transmission shaft 5 drives the lever 8 and the trigger rod 81 to deflect to the trigger position, and the return spring 6 is compressed and stores energy. The trigger rod 81 pushes the reversing valve 4 to the second working position, and the hydraulic oil in the oil inlet circuit enters the pressure sensor 13 through the reversing valve 4 and the oil pipe. After the pressure sensor 13 detects that the pressure of the hydraulic oil reaches the set value, it transmits a pressure signal to the control device to indicate that the drill string is in place;

[0078] After the drill string is removed from the hydraulic hanger, under the action of the return spring 6, the lever 8 drives the trigger rod 81 to deflect from the trigger position to the initial position, the reversing valve 4 is switched from the second working position to the first working position, the hydraulic oil in the oil inlet circuit cannot enter the pressure sensor 13, the pressure of the hydraulic oil detected by the pressure sensor 13 cannot reach the set value, and the pressure sensor 13 transmits a pressure signal to the control device to indicate that the drill string is not in place.

[0079] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0080] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present invention, unless otherwise clearly specified or limited, when a first feature is "on" or "under" a second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when a first feature is "above", "over" and "on top of" a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it merely means that the horizontal height of the first feature is higher than that of the second feature. When a first feature is "under", "beneath" and "underneath" a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it merely means that the horizontal height of the first feature is lower than that of the second feature.

[0082] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for processing the load signal of a hydraulic elevating worktable, characterized in that, The hydraulic elevators used in the described method include: An elevator body and a door, which are hinged to switch between an open state and a closed state; Multiple bushings, which are respectively installed on the elevator body and the door. In the closed state, the multiple bushings on the door and the elevator body can enclose a cylinder to place the drill pipe; Among them, the multiple bushings include a movable bushing installed on the door, and the movable bushing can move up and down between a first position and a second position. Under the action of the drill pipe, the movable bushing can move from the first position to the second position. When the drill pipe is removed, the movable bushing can move from the second position to the first position; A load detection device for detecting the position of the movable bushing; A control device for controlling the opening and closing of the door and for receiving and processing the detection signal of the load detection device; The method includes: when the control device detects that the door and the elevator body are in the closed state and the load detection device detects that the movable bushing is in the second position, the control device instructs the driller that the drill pipe is in place; The method specifically includes the following steps: S1. The control device detects whether the door and the elevator body are in the closed state; S2. If the control device detects that the door and the elevator body are in the open state, the control device determines that the drill pipe is not in place; If the control device detects that the door and the elevator body are in the closed state, the load detection device detects the position of the movable bushing. When it detects that the movable bushing is in the second position, the load detection device is triggered, and the load detection device transmits a trigger signal to the control device. The control device instructs the driller that the drill pipe is in place. Otherwise, the control device instructs the driller that the drill pipe is not in place.

2. The hydraulic elevator latch load signal processing method according to claim 1, characterized in that, The load detection device includes a trigger rod and a load indicating mechanism; The trigger rod has an initial position and a trigger position. The trigger rod can rotate between the initial position and the trigger position as the movable bushing moves. When the movable bushing is in the second position, the trigger rod rotates to the trigger position to trigger the load indicating mechanism. The load indicating mechanism transmits a trigger signal to the control device, and the control device instructs the driller that the drill pipe is in place. Otherwise, the control device instructs the driller that the drill pipe is not in place.

3. The hydraulic elevator latch load signal processing method according to claim 2, wherein The load indicating mechanism includes a directional control valve; The directional control valve has a first working position and a second working position, and the trigger rod is used to switch the directional control valve between the first working position and the second working position; When the trigger rod is in the initial position, the directional control valve is in the first working position, and the load indicating mechanism is not triggered. The control device instructs the driller that the drill pipe is not in place; When the trigger rod is in the trigger position, the directional control valve is in the second working position, and the load indicating mechanism transmits a trigger signal to the control device. The control device instructs the driller that the drill pipe is in place.

4. The hydraulic elevator load signal processing method according to claim 3, wherein The load indicating mechanism further includes a pressure sensor; The pressure sensor is communicated with the oil discharge end of the reversing valve through an oil pipe. The oil inlet end of the reversing valve is communicated with the oil inlet oil circuit, and the oil return end of the reversing valve is communicated with the oil return oil circuit; When the trigger rod is in the initial position, the reversing valve is in the first working position. The hydraulic oil in the oil inlet oil circuit cannot enter the pressure sensor, and the pressure of the hydraulic oil detected by the pressure sensor cannot reach the set value. The pressure sensor transmits a pressure signal to the control device to indicate that the drill tool is not in place; When the trigger rod is in the trigger position, the reversing valve is in the second working position. The hydraulic oil in the oil inlet oil circuit can enter the pressure sensor through the reversing valve and the oil pipe. After the pressure sensor detects that the pressure of the hydraulic oil reaches the set value, it transmits a pressure signal to the control device to indicate that the drill tool is in place.

5. The hydraulic elevator latch load signal processing method according to claim 4, characterized in that, The pressure sensor is an explosion-proof pressure sensor.

6. The hydraulic elevator clamp load signal processing method according to claim 4, characterized in that, The load detection device further includes: A transmission shaft that can move up and down with the movable filling core; A lever that can drive the trigger rod to deflect. The middle of the lever is rotatably connected to the door body. One end of the lever is hinged to the transmission shaft at the top, and a pin shaft is installed at the top of the other end. The top end of the pin shaft can extend into the door body; A return spring for making the lever drive the trigger rod to rotate from the trigger position to the initial position is sleeved on the pin shaft. The top end of the return spring abuts against the door body, and the bottom end abuts against the lever; The movable filling core moves downward under the action of the drill tool to drive the transmission shaft to move downward. The transmission shaft drives the lever and the trigger rod to deflect to the trigger position. The return spring is compressed and stores energy. The trigger rod pushes the reversing valve to be in the second working position. The hydraulic oil in the oil inlet oil circuit enters the pressure sensor through the reversing valve and the oil pipe. After the pressure sensor detects that the pressure of the hydraulic oil reaches the set value, it transmits a pressure signal to the control device to indicate that the drill tool is in place; After the drill tool is removed from the hydraulic elevator, under the action of the return spring, the lever drives the trigger rod to deflect from the trigger position to the initial position. The reversing valve is switched from the second working position to the first working position. The hydraulic oil in the oil inlet oil circuit cannot enter the pressure sensor, and the pressure of the hydraulic oil detected by the pressure sensor cannot reach the set value. The pressure sensor transmits a pressure signal to the control device to indicate that the drill tool is not in place.

7. The hydraulic elevator load signal processing method according to any one of claims 1 to 6, characterized in that It further includes a display screen for displaying whether the drill tool is in place. The display screen is electrically connected to the control device.

8. The hydraulic elevator latch load signal processing method according to any one of claims 3 to 6, characterized in that It further includes a protective cover for protecting the reversing valve; The reversing valve is installed at the bottom end of the elevator body, the protective cover is installed at the bottom end of the reversing valve, and the protective cover is connected to the door body.

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