Fracturing equipment power transmission system automatic shutdown method

Abstract

The application discloses a kind of automatic stop methods of fracturing equipment power transmission system, the automatic stop device for, at the end of existing fracturing equipment transmission system's fracturing pump crankshaft, install rotating speed measuring assembly, rotating speed measuring assembly monitors the running speed of fracturing pump crankshaft;Fracturing pump crankshaft running speed is transmitted to the whole machine controller in real time through control line III;Whole machine controller built-in program will automatically compare crankshaft running speed, engine controller transmission engine running speed and transmission box controller transmission transmission box running speed, when finding that the running speed of fracturing pump crankshaft, transmission box and engine is abnormal, whole machine controller issues alarm signal, simultaneously, stop command is issued to engine and transmission box, controls its quick stop work, to carry out safety protection to entire transmission system.

Description

Technical Field

[0001] This invention belongs to the technical field of petroleum, coalbed methane and shale gas equipment, and relates to an automatic shutdown method for the power transmission system of fracturing equipment. Background Technology

[0002] Fracturing equipment (such as fracturing trucks (skids)) is a core piece of equipment in unconventional oil and gas development. Its main function is to draw in fracturing fluid, pressurize it, and inject it into the well bottom to fracture and stimulate the reservoir, thereby improving oil and gas recovery. The power transmission system of a fracturing truck (skid) consists of a truck engine, transmission box, drive shaft, and fracturing pump. In recent years, due to factors such as increasing construction intensity, quality defects in individual components, untimely equipment maintenance, and remote operation, accidents such as accidental breakage of rotating parts of the transmission box / motor, drive shaft, and fracturing pump during operation often go undetected, while power continues to be input. This leads to increased damage to the components themselves and loss of control of the rotating parts, causing damage to other components. In addition, there have been incidents where uncontrolled rotation of components has caused friction with other components, generating high heat and sparks, leading to fires of the entire machine and causing even greater losses. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic shutdown method for the power transmission system of fracturing equipment, which solves the problem in the prior art where the rotating parts of the transmission box, transmission shaft and fracturing pump break unexpectedly during the operation of fracturing equipment (fracturing truck (skidney)), causing increased damage to itself, damage to other components and causing the whole machine to catch fire, thus ensuring equipment safety.

[0004] The technical solution adopted in this invention is an automatic shutdown method for the power transmission system of fracturing equipment, which specifically includes the following steps:

[0005] Step 1: The main unit controller inputs the speed N to the engine controller through control line I, and the engine controller controls the engine to work.

[0006] Step 2: Install a speed measurement component on the fracturing pump. The speed measurement component monitors the speed N3 of the fracturing pump crankshaft in real time and transmits the speed N3 to the whole machine controller through control line III. The transmission box controller transmits the collected transmission box speed N2 to the whole machine controller through control line II. The engine controller transmits the collected engine speed N1 to the controller through control line I.

[0007] Step 3: The input speed N has a linear correspondence with each pair of N1, N2 and N3. The whole machine controller compares N with N1, N2 and N3. When any two of the linear correspondences are abnormal, the whole machine controller automatically issues a stop command.

[0008] The invention is further characterized by:

[0009] In step 2, the speed measuring assembly includes a switch support, on which a proximity switch is mounted;

[0010] It also includes a measuring sleeve, one end of which is equipped with a counting toothed ring, which is positioned opposite to the proximity switch; the other end of the measuring sleeve is equipped with a flange, and the measuring sleeve is connected to the fracturing pump through the flange.

[0011] The proximity switch transmits the crankshaft speed N3 of the fracturing pump back to the main controller via control line III.

[0012] In step 3, the linear relationship between N and N1, N2, and N3 is shown in the following formula (1):

[0013] N=K1N1=K1N2=K3N3.

[0014] In step 3, the whole machine controller determines in real time whether the rotational speeds N1, N2, and N3 are consistent with N / K1, N / K2, and N / K3 respectively. If there is any inconsistency, a stop command is issued.

[0015] In step 3, if N1≠N / K1, N2≠N / K2, and N3≠N / K3, the whole machine controller determines that the engine has malfunctioned, alarms the engine malfunction, and automatically issues an engine stop command.

[0016] In step 3, if N1 = N / K1, N2 ≠ N / K2, and N3 ≠ N / K3, the whole machine controller determines that the transmission box has a fault, alarms the transmission box fault, and automatically issues an engine stop command.

[0017] In step 3, if N1 = N / K1, N2 = N / K2, and N3 ≠ N / K3, the whole machine controller determines that the fracturing pump or drive shaft has malfunctioned, and automatically issues an engine shutdown command while alarming the fracturing pump or drive shaft for malfunction.

[0018] The beneficial effect of this invention is that this device can monitor the rotational speed of moving parts in the power transmission system of fracturing equipment. If there is an abnormality, the transmission system can automatically stop operating, thereby avoiding problems such as increased damage to the moving parts themselves, damage to other parts, and causing the whole machine to catch fire, thus ensuring equipment safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the automatic shutdown device used in the automatic shutdown method of the power transmission system of the fracturing equipment of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation structure of the speed measurement component in the automatic shutdown device;

[0021] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle;

[0022] Figure 4(a) , 4(b) This is a schematic diagram of the rotational speed measurement component;

[0023] Figure 5 This is the control flow chart of the power transmission system of the fracturing equipment;

[0024] In the diagram, 1. Engine, 2. Engine controller, 3. Control line I, 5. Transmission box, 6. Control line II, 7. Transmission box controller, 8. Drive shaft;

[0025] 9. Fracturing pump; 9-1. Crankshaft; 9-2. Crankshaft end cover; 9-3. Connecting bolt I; 9-4. Gland; 9-5. Connecting bolt II; 9-7. Lubrication system; 9-8. Rotary sealing ring assembly;

[0026] 10. Overall controller; 11. Control line III;

[0027] 12. Speed ​​measuring assembly, 12-1. Switch support, 12-2. Proximity switch, 12-3. Measuring sleeve, 12-4. Counting gear ring, 12-5. Flange. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] The automatic shutdown method for the power transmission system of fracturing equipment of the present invention employs an automatic shutdown device, such as... Figure 1 As shown, a speed measurement component is connected to the existing power transmission system of the fracturing equipment. In the existing power transmission system of the fracturing equipment, the engine 1, transmission box 5, transmission shaft 8 and fracturing pump 9 are connected in sequence. The whole machine controller 10 is electrically connected to the engine controller 2 and transmission box controller 7 through control line I3 and control line II6, respectively.

[0030] The whole machine controller 10 transmits the speed N to the engine controller 2 through the control line I3, so as to control the speed N1 of the engine 1;

[0031] The whole machine controller 10 transmits the neutral and shift commands to the transmission box controller 7 through the control line II6, thereby controlling the neutral and gear adjustment of the transmission box 5.

[0032] When the power transmission system of the fracturing equipment is working, the whole machine controller I10 transmits the engine operating speed and transmission gear position commands to the engine controller 2 and transmission gear controller 7, and the engine 1 and transmission gear 5 will start working, transmitting power to the fracturing pump 9 through the drive shaft 8, driving the fracturing pump 9 to work. At the same time, the engine controller 2 transmits the collected engine speed N1 and power operating parameters of the engine 1 back to the whole machine controller 10 through the control line I3, and the whole machine controller 10 then obtains the operating parameter information of the engine 1.

[0033] The transmission box controller 7 transmits the collected transmission box 5 speed N2 and gear working parameters back to the whole machine controller 10 through control line II 6, and the whole machine controller 10 obtains the working parameter information of the transmission box 5.

[0034] like Figure 2 , 3 As shown, the fracturing pump 9 includes a crankshaft 9-1, a crankshaft end cover 9-2, connecting bolt I 9-3, a gland 9-4, connecting bolt II 9-5, a lubrication system 9-7, and a rotary sealing ring assembly 9-8;

[0035] The crankshaft 9-1 has a crankshaft end cover 9-2 at its end, and a speed measuring component 12 is installed on the crankshaft end cover 9-2;

[0036] The speed measuring assembly 12 includes a switch support 12-1, a proximity switch 12-2, and a measuring sleeve 12-3;

[0037] A proximity switch 12-2 is installed on the switch support 12-1, and the proximity switch 12-2 is positioned close to the measuring sleeve 12-3.

[0038] Figure 4(a) is a front view of measuring sleeve 12-3; Figure 4(b) is a side view of measuring sleeve 12-3; a lubrication system 12-7 is connected to the center of measuring sleeve 12-3; measuring sleeve 12-3 is connected to the lubrication system 9-7 via a threaded rotary joint; a counting gear ring 12-4 is machined at one end of measuring sleeve 12-3, and a flange 12-5 is machined at the other end of measuring sleeve 12-3; the flange 12-5 is connected to the crankshaft 9 via connecting bolt I 9-6. -1. The counting gear ring 12-4 is positioned close to the proximity switch 12-2, with a relative gap between the counting gear ring 12-4 and the proximity switch 12-2. The proximity switch 12-2 (which measures the crankshaft 9-1's rotational speed via the counting gear ring 12-4) transmits the crankshaft 9-1's rotational speed N3 back to the main controller 10 via control line Ⅲ11. The switch support 12-1 is fixedly connected to the gland 9-4 and the crankshaft end cover 9-2 via connecting bolt Ⅱ9-5. The gland 9-4 is connected to the crankshaft end cover 9-2 via connecting bolt Ⅱ9-5. A rotating sealing ring assembly 9-8 is provided on the gland 9-4 to ensure that lubricating oil does not leak to the outside after being injected into the fracturing pump through the lubrication system 9-7.

[0039] A speed measuring component 12 is installed on the fracturing pump 9, which can count the speed N3 of the fracturing pump crankshaft 9-1 in real time; such as Figure 5 As shown, the whole machine controller 10 sends working instructions to the engine controller 2 and the transmission box controller 7 through control line I3 and control line II6 respectively to control their operation. At the same time, it can also collect the working parameter information of the engine 1 and the transmission box 5 and the speed N3 of the speed measurement component 12.

[0040] The whole machine controller 10 can acquire the rotational speeds of each component in the entire power transmission system, including the fracturing pump 9, the transmission box 5, and the engine 1, and automatically verify them through a program.

[0041] Since the engine 1, transmission box 5, transmission shaft 8 and fracturing pump 9 are connected in sequence, the input speed N has a linear correspondence with each pair of N1, N2 and N3, N = K1N1 = K1N2 = K3N3, where K1, K2 and K3 are fixed coefficients.

[0042] The built-in program of the whole machine controller 10 automatically compares N with N1, N2, and N3. When any two of them are abnormal, it automatically issues a whole machine stop command, which is sent to the engine controller 2 and the transmission controller 7 through control line I3 and control line II6 to control them to stop working quickly. Specifically:

[0043] N1, N2, and N3 are fed back to the machine controller 10 in real time. The built-in program of the machine controller 10 checks in real time whether the values ​​of speed N1, N2, and N3 are consistent with N / K1, N / K2, and N / K3 respectively.

[0044] 1) If they are inconsistent, the whole machine controller 10 can determine that the engine 1 has a fault, and at the same time issue an engine stop command while alarming the engine fault.

[0045] 2) If the value of N1 is consistent with N / K1, and the values ​​of N2 and N3 are inconsistent with N / K2 and N / K3 respectively, the whole machine controller 10 can determine that the transmission box 5 has a fault, and automatically issue an engine stop command while alarming the transmission box fault.

[0046] 3) If the values ​​of N1 and N2 are consistent with N / K1 and N / K2, and the value of N3 is inconsistent with N / K3, the whole machine controller 10 can determine that the fracturing pump 9 or the drive shaft 8 has failed, and will automatically issue an engine shutdown command while alarming the fracturing pump 9 or the drive shaft 8 for failure.

[0047] The automatic shutdown method for the power transmission system of fracturing equipment of the present invention employs an automatic shutdown device in which a speed measuring component is installed at the end of the crankshaft of the fracturing pump in the existing fracturing equipment transmission system. The speed measuring component monitors the crankshaft speed of the fracturing pump. The crankshaft speed is transmitted in real time to the overall controller via control line III. The built-in program of the overall controller automatically compares the crankshaft speed, the engine speed transmitted by the engine controller, and the transmission speed transmitted by the transmission controller. When abnormalities are detected in the crankshaft, transmission, and engine speeds, the overall controller issues an alarm signal and simultaneously issues a shutdown command to the engine and transmission to control them to stop working quickly, thereby providing safety protection for the entire transmission system.

[0048] Example 1

[0049] The automatic shutdown method for the power transmission system of fracturing equipment of the present invention specifically includes the following steps:

[0050] Step 1: The main unit controller inputs the speed N to the engine controller through control line I, and the engine controller controls the engine to work.

[0051] Step 2: Install a speed measurement component on the fracturing pump. The speed measurement component monitors the speed N3 of the fracturing pump crankshaft in real time and transmits the speed N3 to the whole machine controller through control line III. The transmission box controller transmits the collected transmission box speed N2 to the whole machine controller through control line II. The engine controller transmits the collected engine speed N1 to the controller through control line I.

[0052] Step 3: The input speed N has a linear correspondence with each pair of N1, N2 and N3. The whole machine controller compares N with N1, N2 and N3. When any two of the linear correspondences are abnormal, the whole machine controller automatically issues a stop command.

[0053] Example 2

[0054] The automatic shutdown method for the power transmission system of fracturing equipment of the present invention, based on embodiment 1, includes a speed measuring component comprising a switch support, on which a proximity switch is installed;

[0055] It also includes a measuring sleeve, one end of which is equipped with a counting toothed ring, which is positioned opposite to the proximity switch; the other end of the measuring sleeve is equipped with a flange, and the measuring sleeve is connected to the fracturing pump through the flange.

[0056] Example 3

[0057] The automatic shutdown method of the power transmission system of the fracturing equipment of the present invention, based on Example 2, involves a proximity switch transmitting the crankshaft speed N3 of the fracturing pump back to the whole machine controller via control line III.

[0058] Example 4

[0059] The automatic shutdown method for the power transmission system of the fracturing equipment of the present invention, based on Example 3, has the following linear relationship between N and N1, N2 and N3 in step 3, as shown in formula (1):

[0060] N=K1N1=K1N2=K3N3.

[0061] Example 5

[0062] The automatic shutdown method of the power transmission system of the fracturing equipment of the present invention, based on embodiment 4, in step 3, the whole machine controller judges in real time whether the rotational speeds N1, N2, and N3 are consistent with N / K1, N / K2, and N / K3 respectively. If there is a discrepancy, a shutdown command is issued.

[0063] Example 6

[0064] The automatic shutdown method for the power transmission system of the fracturing equipment of the present invention, based on Example 5, in step 3, if N1≠N / K1, N2≠N / K2, and N3≠N / K3, the whole machine controller determines that the engine has malfunctioned, and automatically issues an engine shutdown command while alarming the engine malfunction.

[0065] Example 7

[0066] The automatic shutdown method for the power transmission system of the fracturing equipment of the present invention, based on embodiment 5, in step 3, if N1=N / K1, N2≠N / K2, N3≠N / K3, the whole machine controller determines that the transmission box has malfunctioned, and at the same time as alarming the transmission box malfunction, automatically issues an engine shutdown command.

[0067] Example 8

[0068] The automatic shutdown method for the power transmission system of fracturing equipment of the present invention, based on embodiment 5, in step 3, if N1=N / K1, N2=N / K2, N3≠N / K3, the whole machine controller determines that the fracturing pump or the drive shaft has malfunctioned, and at the same time as alarming the fracturing pump or the drive shaft, automatically issues an engine shutdown command.

Claims

1. An automatic shutdown method for the power transmission system of fracturing equipment, characterized in that: Specifically, the steps include the following: Step 1: The main unit controller inputs the speed N to the engine controller through control line I, and the engine controller controls the engine to work. Step 2: Install a speed measurement component on the fracturing pump. The speed measurement component monitors the speed N3 of the fracturing pump crankshaft in real time and transmits the speed N3 to the whole machine controller through control line III. The transmission box controller transmits the collected transmission box speed N2 to the whole machine controller through control line II. The engine controller transmits the collected engine speed N1 to the controller through control line I. Step 3: The input speed N has a linear correspondence with each pair of N1, N2 and N3. The whole machine controller compares N with N1, N2 and N3. When any two of the linear correspondences are abnormal, the whole machine controller automatically issues a stop command.

2. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 1, characterized in that: In step 2, the rotation speed measuring component includes a switch support, and a proximity switch is installed on the switch support. It also includes a measuring sleeve, one end of which is equipped with a counting toothed ring, which is positioned opposite to the proximity switch; the other end of the measuring sleeve is equipped with a flange, and the measuring sleeve is connected to the fracturing pump through the flange.

3. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 2, characterized in that: The proximity switch transmits the crankshaft speed N3 of the fracturing pump back to the overall controller via control line III.

4. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 1, characterized in that: In step 3, the linear relationship between N and N1, N2 and N3 is shown in the following formula (1): N=K1N1=K1N2=K3N3.

5. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 4, characterized in that: In step 3, the whole machine controller determines in real time whether the rotational speeds N1, N2, and N3 are consistent with N / K1, N / K2, and N / K3 respectively. If there is a discrepancy, a stop command is issued.

6. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 5, characterized in that: In step 3, if N1≠N / K1, N2≠N / K2, and N3≠N / K3, the whole machine controller determines that the engine has malfunctioned, and automatically issues an engine stop command while alarming the engine malfunction.

7. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 5, characterized in that: In step 3, if N1 = N / K1, N2 ≠ N / K2, and N3 ≠ N / K3, the whole machine controller determines that the transmission box has a fault, and at the same time as issuing a fault alarm for the transmission box, it automatically issues an engine stop command.

8. The automatic shutdown method for the power transmission system of fracturing equipment according to claim 5, characterized in that: In step 3, if N1 = N / K1, N2 = N / K2, and N3 ≠ N / K3, the whole machine controller determines that the fracturing pump or drive shaft has malfunctioned, and automatically issues an engine shutdown command while alarming the fracturing pump or drive shaft for malfunction.

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