A method and device for detecting the load of a fracturing pump

Abstract

The present invention discloses a method and device for detecting the load of a fracturing pump, which relates to the technical field of fracturing pump load detection. It solves the problem that the detection device can only detect the pressure generated in the horizontal direction when the pull rod moves through a pressure sensor. If the position of the pull rod shifts during movement, the detection device cannot detect it. When using the fracturing pump in the case of a shift in the position of the pull rod, it will not only cause damage to the device but also reduce the working efficiency. It includes a fracturing pump, a detection device, a mounting mechanism, a protection mechanism, a pressure detection mechanism, and a displacement detection mechanism. Through the set displacement detection mechanism, when the pull rod shifts in position inside the fixed ring, the limit block will squeeze the first pressure sensor, and at this time, the second warning light will light up, prompting the staff that the position of the pull rod has shifted, which is convenient for timely maintenance of the fracturing pump.

Description

Technical Field

[0001] The present invention relates to the technical field of fracture pump load detection, and specifically provides a fracture pump load detection method and device. Background Art

[0002] The fracture pump is the core part of the fracturing equipment. The fracture pump mainly consists of a power end, a hydraulic end, and a lubrication system. With the continuous increase in the depth of oil and gas development, the fracture pump has increasingly become a key part of research and development. According to the continuous development of shale gas worldwide and the characteristics of oil and gas well exploitation in China, during the long-term use of the fracture pump, the internal pull rod needs to continuously work. In order to prevent the pull rod from being unstable during work, a detection device is required to monitor it in real time to prevent the occurrence of load on the pull rod and to be able to repair it in a timely manner.

[0003] After retrieval, the patent with the Chinese patent authorization announcement number CN110985368A discloses a fracture pump load detection device and a fracturing equipment, which relates to the fracturing technology field. The fracture pump load detection device includes a hydraulic end, a power end, and a pull rod. One end of the pull rod is connected to the hydraulic end, and the other end is connected to the power end. The pull rod includes a detection tooling and a tension and compression unit. The detection tooling is fixedly installed in the tension and compression unit. The tension and compression unit is used to transmit the power of the power end to the hydraulic end, and the detection tooling is used to detect the internal load of the tension and compression unit in real time. Compared with the prior art, the fracture pump load detection device provided by the present invention can detect the internal load of the tension and compression unit in real time due to the adoption of the pull rod connected between the power end and the hydraulic end and the detection tooling installed in the tension and compression unit, so as to accurately judge the health performance of the fracturing equipment, which is practical and reliable. However, this detection device can only detect the pressure generated in the horizontal direction when the pull rod moves through a pressure sensor. If the position of the pull rod shifts during movement, the detection device cannot detect it. When using the fracture pump in the case of the pull rod position shift, if the pull rod position shift phenomenon occurs, it will not only cause damage to the device, but also reduce the working efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a fracture pump load detection method and device, which solves the problem that the detection device can only detect the pressure generated in the horizontal direction when the pull rod moves through a pressure sensor. If the position of the pull rod shifts during movement, the detection device cannot detect it. When using the fracture pump in the case of the pull rod position shift, if the pull rod position shift phenomenon occurs, it will not only cause damage to the device, but also reduce the working efficiency.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions: A method and device for detecting the load of a fracturing pump, including a fracturing pump, a detection device, a mounting mechanism, a protection mechanism, a pressure detection mechanism, and a displacement detection mechanism. A protection shell is fixedly installed on the right side of the fracturing pump. A power end connecting pipe is fixedly installed inside the protection shell. The detection device is firmly installed inside the power end connecting pipe. The detection device is composed of a mounting mechanism, a protection mechanism, a pressure detection mechanism, and a displacement detection mechanism. The mounting mechanism is arranged on the left side of the detection device. The protection mechanism and the pressure detection mechanism are both arranged inside the detection device. The displacement detection mechanism is arranged inside the pressure detection mechanism;

[0006] A hydraulic end assembly is fixedly installed on the right side wall of the protection shell. A pull rod is arranged on the right side of the fracturing pump and is fixedly connected to the power end assembly inside the fracturing pump. The pull rod passes through the left side wall of the power end connecting pipe to the inside of the power end connecting pipe. The detection device is sleeved on the rod wall of the pull rod.

[0007] Preferably, the pressure detection mechanism includes a pressure sensor mounting ring, an extrusion ring, a connecting ring, a tension spring, and a first alarm lamp. An installation pipe is arranged inside the detection device. The outer side wall of the installation pipe is fixedly connected to the inner side wall of the power end connecting pipe. Fixed pipes are symmetrically and fixedly installed on the inner side wall of the installation pipe and are arranged on the right side of the hydraulic end assembly. The pressure sensor mounting rings are symmetrically arranged on both sides of the installation pipe and are fixedly sleeved on the pipe walls of the fixed pipes. The extrusion rings are fixedly installed on the side walls of the pressure sensor mounting rings, and the extrusion rings on the two pressure sensor mounting rings face downward. The connecting rings are symmetrically arranged on both sides of the installation pipe and are respectively arranged between the pressure sensor mounting rings and the installation pipe and are both slidably sleeved on the pipe walls of the fixed pipes. The tension springs are respectively fixedly installed between the pressure sensor mounting rings and the connecting rings. The tension springs are arranged between the two fixed pipes. A second pressure sensor is fixedly installed between the extrusion ring and the pressure sensor mounting ring. The first alarm lamp is fixedly installed on the upper end of the protection shell and is linearly connected to the second pressure sensor. The pull rod passes through the inside of the pressure sensor mounting ring, the connecting ring, and the installation pipe and is welded to the inside of the connecting ring. When the pull rod moves through the power end assembly, it will drive the connecting rings on both sides to move. The movement of the connecting rings will cause the tension spring to squeeze the extrusion ring, and the extrusion ring will squeeze the second pressure sensor on the pressure sensor mounting ring, so that the force during the movement of the pull rod can be conveniently and real-time monitored.

[0008] Preferably, the displacement detection mechanism includes a fixed ring, a fixed block, a connection hole, a limit block, a limit groove, a first sliding groove, a first pressure sensor, a second sliding groove and a second alarm light. The connection hole is arranged inside the connection ring. The fixed ring is arranged inside the connection hole and is welded to the rod wall of the pull rod. The limit grooves are symmetrically arranged inside the two side walls of the connection hole. The first pressure sensors are arranged on the end side walls of the limit grooves. The first sliding grooves are arranged inside the inner side walls of the bottom surfaces of the limit grooves. The limit blocks are symmetrically and fixedly connected to the two side walls of the fixed ring. The limit blocks are respectively slidably connected inside the first sliding grooves. The size of the fixed block matches the size of the limit groove and is fixedly connected to the inside of the limit groove through a fastening bolt. The second sliding grooves are arranged inside the bottom surfaces of the fixed blocks, and the upper ends of the fixed blocks are respectively slidably connected inside the second sliding grooves. The second alarm light is fixedly installed on the upper end of the protective shell. The second alarm light is linearly connected to the two first pressure sensors. Therefore, when the pull rod is displaced, it can drive the position of the fixed ring to move. The limit blocks on the fixed ring will slide between the first sliding groove and the second sliding groove and will touch the first pressure sensor, so that the second alarm light will light up to prompt the staff.

[0009] Preferably, the protection mechanism includes a moving groove, an oil outlet hole, an oil inlet hose and a ball. The moving grooves are symmetrically arranged inside the side walls of the fixed pipe respectively. The oil outlet holes are arranged inside the moving grooves and are communicated with the inside of the fixed pipe and are symmetrically arranged at both ends of the fixed pipe. Installation holes are arranged inside both ends of the connection ring, and the connection rings are respectively sleeved on the pipe wall of the fixed pipe through the installation holes. The balls are symmetrically rotated inside the inner side walls of the installation holes. The balls are respectively slidably connected to the inside of the moving grooves through the connection rings. The oil inlet hose is fixedly connected to the left end of the fixed pipe, and the upper end of the oil inlet hose penetrates through the upper side wall of the power end connecting pipe and then penetrates through the upper side wall of the protective shell to the outside of the protective shell. Therefore, when the connection ring moves, it can move on the fixed pipe through the balls, which can not only reduce the friction between the connection ring and the fixed pipe, but also improve the work efficiency.

[0010] Preferably, the installation mechanism includes an installation seat and a fixing bolt. The installation seats are fixedly sleeved on the left end pipe wall of the fixed pipe. The fixing bolts are symmetrically threadedly connected to the inside of the installation seats. The installation seats are fixedly connected to the left side wall inside the power end connecting pipe through the fixing bolts, so as to reinforce the position of the fixed pipe.

[0011] Preferably, the balls are ceramic balls, so as to enhance the service life of the balls.

[0012] Preferably, the left end of the fixed pipe is open and the right end is sealed, so as to prevent the lubricating oil input inside from leaking out through the right end of the fixed pipe.

[0013] Preferably, the right end of the fixed pipe is fixedly connected to the right side wall inside the protective shell, thereby strengthening the stability of the position of the fixed pipe.

[0014] Preferably, S1: Install the detection device. Install the detection device inside the power end connecting pipe, make the pull rod penetrate through the inside of the detection device, and weld it to the fixed ring. And make the left end of the fixed pipe be fixedly connected to the inside of the left side wall inside the power end connecting pipe through a fixing bolt. After the components inside the detection device are installed, when installing the installation pipe, make the outer side wall of the installation pipe be fixedly connected to the inside of the power end connecting pipe, so as to strengthen the stability of the detection device during use;

[0015] S2: When the pull rod is working, detect the stability of its pressure value. When the pull rod moves, the connected fixed ring can drive the connecting ring to move. While the connecting ring is moving, it will drive the tension spring to stretch and contract, and can make the tension spring squeeze the extrusion ring when it retracts, and the extrusion ring will squeeze the second pressure sensor. If the detected pressure value is greater than or less than the set pressure value, the first alarm light will light up;

[0016] S3: Detect the position deviation of the pull rod. When the pull rod moves, if there is a phenomenon of position deviation, it will drive the limit block in the fixed ring to slide between the first chute and the second chute. At this time, the limit block can touch the first pressure sensor, so that the second alarm light will light up, reminding the staff for easy timely maintenance. At the same time, the stability of the pull rod during movement can also be strengthened through the fixed ring;

[0017] S4: When detecting the pressure value of the pull rod, reduce the friction between the detection device and the pull rod. When the fracturing pump is working, inject lubricating oil into the inside of the fixed pipe through the oil inlet hose, so that the lubricating oil leaks out to the inside of the moving groove through the oil outlet hole, making the rolling ball move more smoothly and improving the detection efficiency of the detection device.

[0018] The present invention provides a method and device for detecting the load of a fracturing pump. It has the following beneficial effects:

[0019] 1. For this method and device for detecting the load of a fracturing pump, when using the fracturing pump load detection device, through the displacement detection mechanism provided, when the pull rod has a position deviation inside the fixed ring, the limit block will squeeze the first pressure sensor, and at this time the second alarm light will light up, prompting the staff that the position of the pull rod has a deviation phenomenon, which is convenient for timely maintenance work on the fracturing pump;

[0020] 2. For this method and device for detecting the load of a fracturing pump, when using the load detection device of the fracturing pump, by arranging the maintenance device inside the power end protective shell, and the inside of the power end protective shell is used to protect the connection between the tie rod and the power end. At this time, the detection device can be stably installed inside the power end protective shell, which is not only convenient for detecting the tie rod, but also can protect the detection device.

[0021] 3. For this method and device for detecting the load of a fracturing pump, when using the load detection device of the fracturing pump, through the cooperation between the fixed ring and the connecting pipe, the ball inside the connecting ring moves inside the moving groove, which can not only reduce the resistance, but also facilitate the movement of the connecting ring, can discharge the lubricating oil from the oil outlet hole, and can make the movement of the ball more convenient and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the internal structure of the protective shell of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the detection device of the present invention;

[0025] Figure 4 is a side view of the detection device of the present invention;

[0026] Figure 5 is a schematic diagram of the structure of the pressure detection mechanism of the present invention;

[0027] Figure 6 is an exploded view of the displacement detection mechanism of the present invention;

[0028] Figure 7 is the present invention Figure 4 schematic diagram of the structure of part A;

[0029] Figure 8 is the present invention Figure 4 schematic diagram of the structure of part B;

[0030] Figure 9 is the present invention Figure 6 schematic diagram of the structure of part C;

[0031] Figure 10 is a schematic diagram of the detection method structure of the detection device of the present invention.

[0032] In the figure, 1 - pressure pump, 2 - hydraulic end assembly, 3 - protective shell, 4 - power end connecting pipe;

[0033] 5 - detection device;

[0034] 6 - Installation mechanism, 61 - Mounting seat, 62 - Fixing bolt;

[0035] 7 - Protection mechanism, 71 - Moving groove, 72 - Oil outlet hole, 73 - Inlet oil hose, 74 - Ball;

[0036] 8 - Pressure detection mechanism, 81 - Pressure sensor mounting ring, 82 - Extrusion ring, 83 - Connecting ring, 84 - Tension spring, 85 - First alarm light;

[0037] 9 - Displacement detection mechanism, 91 - Fixed ring, 92 - Fixed block, 93 - Connecting hole, 94 - Limit block, 95 - Limit groove, 96 - First sliding groove, 97 - First pressure sensor, 98 - Second sliding groove, 99 - Second alarm light;

[0038] 10 - Pull rod, 11 - Mounting pipe, 12 - Fixed pipe, 13, Connecting hole. Detailed implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1

[0041] Please refer to Figure 1-10 , the embodiment of the present invention provides a method and device for detecting the load of a fracturing pump, including a fracturing pump 1, a detection device 5, an installation mechanism 6, a protection mechanism 7, a pressure detection mechanism 8 and a displacement detection mechanism 9. A protection shell 3 is fixedly installed on the right side of the fracturing pump 1, and a power end connecting pipe 4 is fixedly installed inside the protection shell 3. The detection device 5 is tightly installed inside the power end connecting pipe 4. The detection device 5 is composed of an installation mechanism 6, a protection mechanism 7, a pressure detection mechanism 8 and a displacement detection mechanism 9. The installation mechanism 6 is arranged on the left side of the detection device, the protection mechanism 7 and the pressure detection mechanism 8 are both arranged inside the detection device 5, and the displacement detection mechanism 9 is arranged inside the pressure detection mechanism 8;

[0042] A hydraulic end assembly 2 is fixedly installed on the right side wall of the protective housing 3. A pull rod 10 is arranged on the right side of the fracturing pump 1, and the pull rod 10 is fixedly connected to the power end assembly inside the fracturing pump 1. The pull rod 10 passes through the left side wall of the power end connecting pipe 4 to the inside of the power end connecting pipe 4. The detection device 5 is sleeved on the rod wall of the pull rod 10. When detecting the fracturing pump 1, in order to prevent the position of the pull rod 10 from shifting during operation, when the pull rod 10 moves, it can drive the pressure detection mechanism 8 to move. The pressure detection mechanism 8 detects the force generated when the pull rod 10 moves. If the transmitted force during normal operation exceeds or is lower than the set range, it indicates that there is a fault in the power end assembly or the pull rod 10 has a problem. And through the displacement detection mechanism 9, when the pull rod 10 moves, if the pull rod 10 has a position deviation, the displacement detection mechanism 9 can conveniently detect it, enabling the staff to know conveniently and facilitating the timely emergency repair work on the fracturing pump.

[0043] Embodiment 2

[0044] In order to prevent the pressure change generated by the movement of the pull rod 10 from being inconsistent when the pull rod 10 is working, in this embodiment, as Figure 3-5As shown in the figure, the pressure detection mechanism 8 includes a pressure sensor mounting ring 81, a pressing ring 82, a connecting ring 83, a tension spring 84 and a first warning light 85. An installation pipe 11 is arranged inside the detection device 5, and the outer side wall of the installation pipe 11 is fixedly connected to the inner side wall of the power end connecting pipe 4. The inner side walls of the installation pipe 11 are symmetrically and fixedly provided with fixed pipes 12, and are arranged on the right side of the hydraulic end assembly 2. The pressure sensor mounting rings 81 are symmetrically arranged on both sides of the installation pipe 11, and are fixedly sleeved on the pipe walls of the fixed pipes 12. The pressing rings 82 are fixedly installed on the side walls of the pressure sensor mounting rings 81, and the pressing rings 82 on the two pressure sensor mounting rings 81 face downward. The connecting rings 83 are symmetrically arranged on both sides of the installation pipe 11, and are respectively arranged between the pressure sensor mounting rings 81 and the installation pipe 11, and are all slidably sleeved on the pipe walls of the fixed pipes 12. The tension springs 84 are respectively fixedly installed between the pressure sensor mounting rings 81 and the connecting rings 83. The tension springs 84 are arranged between the two fixed pipes 12. A second pressure sensor is fixedly installed between the pressing ring 82 and the pressure sensor mounting ring 81. The first warning light 85 is fixedly installed at the upper end of the protective shell 3 and is linearly connected to the second pressure sensor. The pull rod 10 passes through the inside of the pressure sensor mounting ring 81, the connecting ring 83 and the installation pipe 11, and is welded to the inside of the connecting ring 83. The right end of the fixed pipe 12 is fixedly connected to the right side wall inside the protective shell 3. When the fracturing pump 1 is working, the pull rod 10 moves through the power end assembly and enters the working state. Therefore, when the pull rod 10 moves, the connecting rings 83 on both sides of the detection device 5 will move, enabling the tension spring 84 to perform telescopic movement. When the tension spring 84 retracts, it can squeeze the pressing ring 82, enabling the pressing ring 82 to squeeze the second pressure sensor, and it can conveniently know the force of the pull rod 10 when it is working.

[0045] Embodiment 2

[0046] In order to prevent the pull rod 10 from shifting in position when it moves, in this embodiment, as Figure 5-6As shown in the figure, the displacement detection mechanism 9 includes a fixed ring 91, a fixed block 92, a connection hole 93, a limit block 94, a limit groove 95, a first chute 96, a first pressure sensor 97, a second chute 98 and a second warning light 99. The connection hole 93 is arranged inside the connection ring 83. The fixed ring 91 is arranged inside the connection hole 93 and is welded to the rod wall of the pull rod 10. The limit grooves 95 are symmetrically arranged inside the two side walls of the connection hole 93. The first pressure sensors 97 are arranged on the end side walls of the limit grooves 95. The first chutes 96 are arranged inside the inner side walls of the bottom surfaces of the limit grooves 95. The limit blocks 94 are symmetrically and fixedly connected to the two side walls of the fixed ring 91. The limit blocks 94 are respectively slidably connected inside the first chutes 96. The size of the fixed block 92 matches the size of the limit groove 95 and is fixedly connected to the inside of the limit groove 95 through a fastening bolt. The second chutes 98 are arranged inside the bottom surfaces of the fixed blocks 92. The upper ends of the fixed blocks 92 are respectively slidably connected inside the second chutes 98. The second warning light 99 is fixedly installed at the upper end of the protective shell 3. The second warning light 99 is linearly connected to the two first pressure sensors 97. When the pull rod 10 works for a long time and its position deviates, it will drive the position of the fixed ring 91 to move. The fixed ring 91 will cause the limit blocks 94 to slide between the first chute 96 and the second chute 98, enabling the limit blocks 94 to easily touch the first pressure sensors 97, trigger the second warning light 99, and remind the staff.

[0047] Embodiment 4

[0048] In order to make the connection ring 83 move more smoothly during movement, in this embodiment, as Figure 2-9 shown, the protection mechanism 7 includes a moving groove 71, an oil outlet hole 72, an oil inlet hose 73 and a ball 74. The moving grooves 71 are respectively symmetrically arranged inside the side walls of the fixed pipe 12. The oil outlet holes 72 are arranged inside the moving grooves 71 and are communicated with the inside of the fixed pipe 12, and are symmetrically arranged at both ends of the fixed pipe 12. Installation holes 13 are arranged inside both ends of the connection ring 83, and the connection ring 83 is respectively sleeved on the pipe wall of the fixed pipe 12 through the installation holes 13. The balls 74 are respectively symmetrically rotated inside the inner side walls of the installation holes 13. The balls 74 are respectively slidably connected to the inside of the moving grooves 71 through the connection ring 83. The oil inlet hose 73 is fixedly connected to the left end of the fixed pipe 12, and the upper end of the oil inlet hose 73 penetrates through the upper end side wall of the power end connecting pipe 4 and simultaneously penetrates through the upper end side wall of the protective shell 3 to the outside of the protective shell 3. The balls 74 are ceramic balls. When the pull rod 10 works, both ends of the connection ring 83 will slide on the fixed pipe 12 and cause the balls 74 to move inside the moving grooves 71. Lubricating oil is input into the inside of the fixed pipe 12 through the oil inlet pipe 73, and the input lubricating oil moves to the inside of the moving grooves 71 through the oil outlet holes 72, enabling the balls 74 to be more lubricated and smooth during use.

[0049] Example 5

[0050] In order to strengthen and stabilize the positions of the detection device 5 and the installation pipe 12, in this embodiment, as Figure 3-6 shown, the installation mechanism 6 includes an installation seat 61 and fixing bolts 62. The installation seats 61 are fixedly sleeved on the left end pipe wall of the fixed pipe 12. The fixing bolts 62 are symmetrically threadedly connected to the inside of the installation seat 61. The installation seat 61 is tightly connected to the left inner wall of the power end connecting pipe 4 through the fixing bolts 62. The left end of the fixed pipe 12 is open and the right end is sealed. When installing the fixed pipe 12, the fixing bolts 62 are threadedly connected to the left inner wall of the power end connecting pipe 4 to enhance the stability of the position of the fixed pipe 12.

[0051] It should be noted that in this embodiment, when using the fracturing pump load detection device, as Figure 1-10As shown, the detection device 5 is installed inside the power end connecting pipe 4, the pull rod 10 passes through the inside of the detection device 5 and is welded to the fixing ring 91, and the left end of the fixing pipe 12 is fixedly connected to the inside of the left side wall in the power end connecting pipe 4 through the fixing bolt 62. After the components inside the detection device 5 are installed, when installing the installation pipe 11, the outer side wall of the installation pipe 11 is fixedly connected to the inside of the power end connecting pipe 4. When detecting the fracturing pump 1, the pull rod 10 moves through the power end assembly. When the pull rod 10 moves, the connecting rings 83 on both sides of the detection device 5 move. The two ends of the connecting ring 83 slide on the fixing pipe 12, and the ball 74 moves inside the moving groove 71. Lubricating oil is input into the inside of the fixing pipe 12 through the oil inlet pipe 73, and the input lubricating oil moves to the inside of the moving groove 71 through the oil outlet hole 72, so that the ball 74 can be more lubricated and smooth during use, and the tension spring 84 can perform telescopic movement. When the tension spring 84 retracts, it can squeeze the extrusion ring 82, so that the extrusion ring 82 can squeeze the second pressure sensor, and it can be convenient to know the force of the pull rod 10 when it is working. If the detected force is less than the set force value range, the first alarm lamp 85 will light up (the first pressure sensor 97 and the second pressure sensor in this device are both controlled by the control device outside the main body of the fracturing pump 1, and at the same time, the pressure value set for the second pressure sensor is also set through the control device. Since the fracturing pump 1 is a device with mature technology, the working state of the fracturing pump 1 and the use of the equipment are not elaborated here too much). When the pull rod 10 works for a long time, if its position shifts, it will drive the position of the fixing ring 91 to move, and the fixing ring 91 will make the limiting block 94 slide between the first sliding groove 96 and the second sliding groove 98, which can conveniently make the limiting block 94 touch the first pressure sensor 97, trigger the second alarm lamp 99, and remind the staff, so that the staff can detect the fracturing pump 1 in time.

[0052] The foregoing shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0053] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fracturing pump load detection device, characterized in that: It includes a fracturing pump (1) and a detection mechanism (5). A protective shell (3) is fixedly installed on the right side of the fracturing pump (1). A power end connecting pipe (4) is fixedly installed inside the protective shell (3). The detection mechanism (5) is tightly installed inside the power end connecting pipe (4). The detection mechanism (5) is composed of a mounting mechanism (6), a protection mechanism (7), a pressure detection mechanism (8) and a displacement detection mechanism (9). The mounting mechanism (6) is arranged on the left side of the detection device. The protection mechanism (7) and the pressure detection mechanism (8) are both arranged inside the detection mechanism (5). The displacement detection mechanism (9) is arranged inside the pressure detection mechanism (8). A hydraulic end assembly (2) is fixedly installed on the right side wall of the protective shell (3). A pull rod (10) is arranged on the right side of the fracturing pump (1), and the pull rod (10) is fixedly connected to the power end assembly inside the fracturing pump (1). The pull rod (10) passes through the left side wall of the power end connecting pipe (4) to the inside of the power end connecting pipe (4). The detection mechanism (5) is sleeved on the rod wall of the pull rod (10). The pressure detection mechanism (8) includes a pressure sensor mounting ring (81), an extrusion ring (82), a connecting ring (83), a tension spring (84) and a first warning light (85). An installation pipe (11) is arranged inside the detection mechanism (5), and the outer side wall of the installation pipe (11) is fixedly connected to the inner side wall of the power end connecting pipe (4). Fixed pipes (12) are symmetrically and fixedly installed on the inner side wall of the installation pipe (11), and are arranged on the right side of the hydraulic end assembly (2). The displacement detection mechanism (9) includes a fixed ring (91), a fixed block (92), a connecting hole (93), a limiting block (94), a limiting groove (95), a first sliding groove (96), a first pressure sensor (97), a second sliding groove (98) and a second warning light (99). The connecting hole (93) is arranged inside the connecting ring (83). The fixed ring (91) is arranged inside the connecting hole (93), and the fixed ring (91) is welded to the rod wall of the pull rod (10). The limiting grooves (95) are symmetrically arranged inside the side wall on both sides in the connecting hole (93). The first pressure sensors (97) are arranged on the end side walls of the limiting grooves (95). The first sliding grooves (96) are arranged inside the bottom inner side wall of the limiting grooves (95). The limiting blocks (94) are symmetrically and fixedly connected to the side walls on both sides of the fixed ring (91). The limiting blocks (94) are respectively slidably connected to the inside of the first sliding grooves (96). The size of the fixed block (92) matches the size of the limiting groove (95), and is fixedly connected to the inside of the limiting groove (95) through a fastening bolt. The second sliding grooves (98) are arranged inside the bottom surface of the fixed block (92), and the upper ends of the fixed blocks (92) are respectively slidably connected to the inside of the second sliding grooves (98). The second warning light (99) is fixedly installed on the upper end of the protective housing (3). The second warning light (99) is linearly connected to the two first pressure sensors (97). The protection mechanism (7) includes a moving groove (71), an oil outlet hole (72), an oil inlet hose (73) and a ball (74).

2. The fracturing pump load detection device according to claim 1, characterized in that: The pressure sensor mounting rings (81) are symmetrically arranged on both sides of the mounting pipe (11), and are fixedly sleeved on the pipe wall of the fixed pipe (12). The extrusion rings (82) are fixedly installed on the side walls of the pressure sensor mounting rings (81), and the extrusion rings (82) on the two pressure sensor mounting rings (81) face downward. The connecting rings (83) are symmetrically arranged on both sides of the mounting pipe (11), and are respectively arranged between the pressure sensor mounting rings (81) and the mounting pipe (11), and are all slidably sleeved on the pipe wall of the fixed pipe (12). The tension springs (84) are respectively fixedly installed between the pressure sensor mounting rings (81) and the connecting rings (83). The tension springs (84) are arranged between the two fixed pipes (12). A second pressure sensor is fixedly installed between the extrusion ring (82) and the pressure sensor mounting ring (81). The first warning light (85) is fixedly installed at the upper end of the protective shell (3) and is linearly connected to the second pressure sensor. The pull rod (10) passes through the interiors of the pressure sensor mounting ring (81), the connecting ring (83) and the mounting pipe (11), and is welded to the interior of the connecting ring (83).

3. The fracturing pump load detection device according to claim 2, wherein: The moving grooves (71) are respectively symmetrically arranged inside the side walls of the fixed pipes (12). The oil outlet holes (72) are all arranged inside the moving grooves (71), communicate with the interior of the fixed pipes (12), and are symmetrically arranged at both ends of the fixed pipes (12). Installation holes (13) are arranged inside both ends of the connecting rings (83), and the connecting rings (83) are respectively sleeved on the pipe walls of the fixed pipes (12) through the installation holes (13). The balls (74) are respectively symmetrically rotated on the inner side walls of the installation holes (13). The balls (74) are respectively slidably connected to the interiors of the moving grooves (71) through the connecting rings (83). The oil inlet hose (73) is fixedly connected to the left end of the fixed pipe (12), and the upper end of the oil inlet hose (73) passes through the upper end side wall interior of the power end connecting pipe (4) and simultaneously passes through the upper end side wall of the protective shell (3) to the outside of the protective shell (3).

4. The fracturing pump load detection device according to claim 3, wherein: The mounting mechanism (6) includes a mounting seat (61) and fixing bolts (62). The mounting seats (61) are fixedly sleeved on the left end pipe walls of the fixed pipes (12). The fixing bolts (62) are symmetrically threadedly connected to the interiors of the mounting seats (61). The mounting seats (61) are tightly connected to the left inner side wall inside the power end connecting pipe (4) through the fixing bolts (62).

5. The fracturing pump load detection device according to claim 3, characterized in that: The balls (74) are ceramic balls.

6. The fracturing pump load detection device according to claim 4, characterized in that: The left end of the fixed pipe (12) is open, and the right end is sealed.

7. The fracturing pump load detection device according to claim 2, characterized in that: The right end of the fixed pipe (12) is fixedly connected to the right inner side wall inside the protective shell (3).

8. The detection method of a fracturing pump load detection device according to any one of claims 1-7, characterized in that: The steps are as follows: S1: Install the detection mechanism (5) inside the power end connecting pipe (4). Pass the pull rod (10) through the inside of the detection mechanism (5) and weld it to the fixed ring (91). Fasten the left end of the fixed pipe (12) to the inner left side wall inside the power end connecting pipe (4) through the fixing bolt (62). After installing the components inside the detection mechanism (5), when installing the installation pipe (11), fixedly connect the outer side wall of the installation pipe (11) to the inside of the power end connecting pipe (4), so that the detection mechanism (5) can be more stable during use; S2: When the pull rod (10) is working, detect the stability of its pressure value. When the pull rod (10) moves, it can drive the connecting ring (83) to move through the connected fixed ring (91). While the connecting ring (83) is moving, it will drive the tension spring (84) to expand and contract. When the tension spring (84) retracts, it can squeeze the extrusion ring (82), and the extrusion ring (82) will squeeze the second pressure sensor. If the detected pressure value is greater than or less than the set pressure value, the first alarm lamp (85) will light up; S3: Detect the position offset of the pull rod (10). When the pull rod (10) moves, if there is a position offset phenomenon, it will drive the limit block (94) in the fixed ring (91) to slide between the first chute (96) and the second chute (98). At this time, the limit block (94) will touch the first pressure sensor (97), so that the second alarm lamp (99) will light up to remind the staff for easy and timely maintenance. At the same time, the fixed ring (91) can also enhance the stability of the pull rod (10) during movement; S4: When detecting the pressure value of the pull rod (10), reduce the friction between the detection mechanism (5) and the pull rod (10). When the fracturing pump (1) is working, inject lubricating oil into the inside of the fixed pipe (12) through the oil inlet hose (73), so that the lubricating oil leaks out to the inside of the moving groove (71) through the oil outlet hole (72), making the movement of the ball (74) smoother and improving the detection efficiency of the detection mechanism (5).

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