Bag opening machine for opening drilling fluid raw material bag and bag opening method

Abstract

The invention discloses a bag opening machine for opening a drilling fluid raw material bag and a bag opening method, and relates to the field of petroleum drilling equipment.The bag opening machine comprises a rack, a hanging beam is fixed to the top of the rack, a crane capable of moving in the length direction of the hanging beam is installed on the hanging beam, and the crane is provided with a weighing module; the crane drives the raw material bag to lift according to the weight of the raw material bag obtained by the weighing module; a feeding rack is arranged in the machine frame and located below the hanging beam. A funnel-shaped hopper is arranged at the top of the charging rack, and the small-diameter end of the hopper is connected with a charging funnel in the slurry preparation system; a bag breaking cone is arranged in the hopper, and the tip end of the bag breaking cone faces the large-diameter end of the hopper. The method is applied to the bag opening machine. According to the invention, on the premise of reducing the labor intensity of personnel and reducing environmental pollution and personal injury caused by raised dust, the powder is completely utilized, and the accuracy of the raw material ratio during the preparation of the drilling fluid is improved.

Description

Technical Field

[0001] The invention relates to the field of oil drilling equipment, in particular to a bag opening machine and a bag opening method for opening drilling fluid raw material bags. Background Art

[0002] In the process of drilling and production in oil and gas fields, drilling fluid (mud) is the lubricant of the entire drilling system and plays a pivotal role. During the drilling process, it is often necessary to add various raw materials through a funnel to prepare the drilling fluid required for the drilling process. These raw materials are usually powdered materials and packed in large bags, usually with a specification of one ton; according to the requirements of the standard, the raw material bag generally has two layers, the outer layer is a woven bag, and the inner layer is a high-strength polyethylene film bag. At present, there are two commonly used bag opening methods on the well site, using a bag breaking cone or directly cutting the material bag with a tool. Both bag opening methods have similar disadvantages: one is that the operator needs to manually clean the bag. Due to the large volume and weight of the raw material bag, the labor intensity of the operator is high; the second is that the powdered material is prone to dust, which brings dust pollution, harming the environment and the health of the operator.

[0003] In order to solve the above technical problems, the technicians learned that Chinese patent with publication number CN218950520U discloses an automatic feeding device, and Chinese patent with publication number CN213995692U discloses a drilling fluid slurry preparation system and an automatic feeding device. Both documents solve the problems of automatic bag breaking, screening and feeding of small bag materials and ton bag materials, improve the feeding speed and slurry preparation efficiency, and avoid the operators from being exposed to a large amount of dust; specific research found that the schemes disclosed in the above two documents cannot fully utilize the powder, which is mainly manifested in at least one major defect, that is, after the bag is broken, since the bag body is directly placed in the hopper, the flexible bag body will appear wrinkled, which results in a small amount of powder attached to the bag body or accumulated in the bag, that is, the powder cannot be completely released.

[0004] To this end, technicians need to propose a new solution to the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a bag opening machine and a bag opening method for opening drilling fluid raw material bags in response to the above-mentioned problems, so as to achieve full utilization of powder and improve the accuracy of raw material ratio when preparing drilling fluid while reducing labor intensity, environmental pollution and personal injury caused by dust.

[0006] The technical solution adopted by the present invention is as follows: a bag opening machine for opening drilling fluid raw material bags, comprising a frame, a hanging beam is fixed on the top of the frame, a crane that can move along the length direction of the hanging beam is installed on the hanging beam, the crane has a weighing module, and the crane obtains the weight of the raw material bag according to the weighing module to drive the raw material bag to rise and fall; a feeding platform is arranged in the frame, and the feeding platform is located below the hanging beam; a funnel-shaped hopper is provided on the top of the feeding platform, and the small diameter end of the hopper is connected to the feeding funnel in the mud preparation system; a bag breaking cone is arranged in the hopper, and the tip of the bag breaking cone faces the large diameter end of the hopper.

[0007] Furthermore, the crane is connected to a controller, that is, the weighing module and the driving device of the crane are both connected to the controller.

[0008] Furthermore, the hopper has a double-layer structure with an inner layer and an outer layer, and there is a cavity between the inner layer and the outer layer; there is an air port above the cavity, and the air port is connected to a suction system, which can extract gas from the cavity or fill gas into the cavity; a cloth bag is arranged between the air port and the cavity, and the cloth bag seals the top of the cavity; the bottom of the cavity is connected to the inside of the small diameter end of the hopper through a discharge hole; and a feed hole is opened on the inner layer.

[0009] Furthermore, the small diameter end is a straight section, and the cavity is connected with the straight section through the discharge hole.

[0010] Furthermore, a baffle is provided at each feed hole, which is located in the cavity and installed on the inner layer, and the position where each baffle is fixedly connected is located above the corresponding feed hole; the projection of the baffle on the inner layer covers part or all of the feed hole.

[0011] Furthermore, the feed hole is opened above the connection position between the bag breaking cone and the hopper.

[0012] Furthermore, the suction system includes an air suction pipe and an air charging pipe, the air suction pipe is connected to an air suction pump; the air charging pipe is connected to an air charging pump or is connected to a main engine air line of the drilling rig via a pulse solenoid valve.

[0013] Furthermore, the air extraction pump, the air charging pump and the pulse solenoid valve are all connected to a controller.

[0014] Furthermore, there are multiple air ports, and the multiple air ports are distributed in a circumferential array with the axis of the hopper as the center.

[0015] Furthermore, the bag breaking cone is a conical structure composed of multiple blades.

[0016] Furthermore, one end of the suspension beam is located outside the frame, the other end of the suspension beam is fixed to one side of the frame, and the suspension beam spans the other side of the frame.

[0017] Furthermore, a limiting member is provided on the hanging beam, and when the crane contacts the limiting member, it is located directly above the feeding platform.

[0018] Furthermore, the limit member is a limit switch, and the limit switch is connected to the controller.

[0019] A method for opening a drilling fluid raw material bag, using the bag opening machine for opening a drilling fluid raw material bag, comprises the following steps:

[0020] S1: Fix the raw material bag at the traction end of the crane, control the crane to lift the raw material bag, and move the raw material bag along the lifting beam until the crane lifts the raw material bag to the target location;

[0021] S2: Control the crane to stop moving, and control the raw material bags under the crane after the crane stops steadily;

[0022] S3: The raw material bag enters the hopper and is punctured by the bag-breaking cone under the action of its own gravity, completing the opening of the raw material bag;

[0023] S4: simultaneously with step S3, the vacuum pump is controlled to work, and the vacuum pump extracts the gas in the cavity through the vacuum pipe;

[0024] S5: After the bag is opened in step S3, the crane is controlled to lift the raw material bag for a certain distance, and the powder in the raw material bag flows out under its own gravity and enters the feeding funnel in the mud preparation system through the hopper;

[0025] S6: At the same time as step S5, the outflowing powder generates dust. The raised powder enters the cavity through the feed hole under the action of the airflow provided by the vacuum pump and is intercepted by the bag;

[0026] S7: Set the interval time, control the pulse solenoid valve to open, and then control the vacuum pump to close. The airflow from the pulse solenoid valve inflates the cavity through the inflation pipe. The pulse back-blowing bag makes the bag shake off the powder. Driven by the inflation airflow, the powder flows from the discharge port into the small-diameter end of the hopper, and then enters the feeding funnel in the mud preparation system.

[0027] S8: After the pulse solenoid valve is opened to the set time, the vacuum pump is controlled to open, and then the pulse solenoid valve is closed to absorb the raised powder again;

[0028] S9: The weighing module of the crane detects the weight of the raw material bag. When the weight of the raw material bag is reduced to the set weight, the crane is controlled to lift the raw material bag to the set height and then lower it again;

[0029] S10: Perform step S9 multiple times, and the set weight is gradually reduced each time; until the weighing module detects that the weight of the raw material bag is only the weight of the bag body or is within the error range of the detected bag weight, the vacuum pump is controlled to be closed, the pulsating solenoid valve is closed, and the crane is controlled to move the bag body away from the specified position; all bag opening operations on the raw material bag are completed.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0031] 1. The present invention can realize automatic bag opening of raw material bags through structures such as a crane, a bag breaking cone, and a hopper, without the need for workers to open and clean bags, effectively reducing the labor intensity of workers and avoiding personal injury;

[0032] 2. The present invention can effectively remove the raised powder by setting an air pump in the suction system in cooperation with the feed hole, thereby reducing the severity of dust generation from the powder, thereby reducing the pollution to the environment;

[0033] 3. The present invention can effectively shake off the powder intercepted on the bag by arranging the cavity, the bag, the inflation pipe and the pulse electromagnetic valve in the suction system, and send it to the feeding funnel in the mud preparation system through the discharge port to achieve recycling, thereby achieving full utilization of the powder, so as to improve the accuracy of the raw material ratio when configuring the drilling fluid;

[0034] 4. In the device and method disclosed in the present invention, with the help of a crane and a weighing module, after releasing part of the powder, the pleated position can be opened and the raw material bag can be shaken by lifting the raw material bag and then lowering it again, so that the powder accumulated at the pleated position and the powder attached to the raw material bag can be shaken off and move to the lowest position of the raw material bag, that is, to the scratched position, so that the powder in the raw material bag can flow out completely, thereby realizing the complete utilization of the powder and improving the accuracy of the raw material ratio when configuring the drilling fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0036] Figure 1 It is a structural schematic diagram of the bag opening machine disclosed in the present invention;

[0037] Figure 2 is a schematic diagram of the pumping process;

[0038] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0039] Figure 4 is a schematic diagram of the inflation process;

[0040] Figure 5The schematic diagram of the arrangement of the air extraction pipe and the air filling pipe is shown in FIG.

[0041] Figure 6 It is a schematic diagram of the structure of the bag breaking cone;

[0042] Markings in the figure: 1-frame; 11-hanging beam; 2-raw material bag; 3-crane; 4-feeding stand; 5-hopper; 50-bag breaking cone; 501-blade; 51-inner layer; 52-outer layer; 53-cavity; 54-small diameter end; 55-discharge hole; 56-feed hole; 57-baffle; 6-cloth bag; 7-inflating pipe; 71-pulse solenoid valve; 8-exhaust pipe; 81-exhaust pump; 9-feeding funnel. DETAILED DESCRIPTION

[0043] In the description of this specification, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of this specification is usually placed when used. It is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this specification.

[0044] In addition, if the terms "horizontal" or "vertical" appear in the description of this specification, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of this specification, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between the internal parts of two elements.

[0046] Example 1

[0047] like Figure 1-Figure 6As shown, a bag opening machine for opening drilling fluid raw material bags comprises a frame 1, a hanging beam 11 is fixed on the top of the frame 1, a crane 3 which can move along the length direction of the hanging beam 11 is installed on the hanging beam 11, the crane 3 has a weighing module, the crane 3 can select an electric hoist, the electric hoist can have a weighing capacity, and a gravity sensor can be arranged at the front end position of the lifting rope in the electric hoist to realize that the crane 3 has a weighing module, thereby realizing that the crane 3 can obtain the weight of the raw material bag 2; the weighing module or the gravity sensor is connected to the control The frame 1 is connected with a feeding platform 4, which is located below the hanging beam 11; the feeding platform 4 has a funnel-shaped hopper 5 on the top, and the small diameter end 54 of the hopper 5 is connected to the feeding funnel 9 in the mud preparation system, and optionally, a sealing connection can be achieved through a conventional flange connection in the field to avoid powder leakage; a bag breaking cone 50 is provided in the hopper 5, and the tip of the bag breaking cone 50 is facing the large diameter end of the hopper 5 to pierce the raw material bag 2 moving downward from the top.

[0048] In this embodiment, the crane 3 is connected to a controller, that is, the weighing module and the driving device of the crane 3 are both connected to the controller. The controller obtains the weight data of the raw material bag 2 obtained by the weighing module, and controls the start-up and working mode of the crane 3 according to the weight of the raw material bag 2.

[0049] It should be noted that the weight of the raw material bag 2 includes the weight of the bag body and the weight of the powder in the bag body. The weight of the powder is a variable. Detecting the weight of the raw material bag is actually detecting the weight of the powder in the bag body.

[0050] The specific work of the bag opening machine is as follows:

[0051] The raw material bag 2 is fixed to the traction end of the crane 3. After the controller controls the crane 3 to lift the raw material bag 2, the raw material bag 2 moves along the hanging beam 11 until the crane 3 reaches the specified position, that is, just above the hopper 5; the controller controls the crane 3 to stop moving. After the crane 3 stops steadily, the controller controls the crane 3 to put down the raw material bag 2. The raw material bag 2 enters the hopper 5 and is pierced by the bag breaking cone 50 under the action of its own gravity, completing the opening of the raw material bag 2; the powder in the raw material bag 2 flows out under the action of its own gravity and enters the hopper 5 through the hopper 5. The feeding funnel 9 in the mud preparation system; the weighing module of the crane 3 detects the weight of the raw material bag 2. When the weight of the raw material bag 2 is reduced to the set weight, the controller controls the crane 3 to lift the raw material bag 2 to the set height and then lower it again. After multiple lifting-lowering operations, the set weight is gradually reduced each time, and the pleat position can be continuously opened and the raw material bag 2 can be shaken, so that the powder accumulated at the pleat position and the powder attached to the raw material bag 2 can be shaken off, so that the powder in the raw material bag 2 can flow out completely.

[0052] It should be noted that the control operation of the controller can also be achieved through manual remote operation.

[0053] It should be noted that, during the whole process, the raw material bag 2 is not completely put down, so that the force applied to the raw material bag 2 is only the lifting force of the crane 3 , so that the subsequent weight module can obtain the remaining weight of the raw material bag 2 .

[0054] In this embodiment, the raw material bag 2 can be automatically opened by the crane 3, the bag breaking cone 50, the hopper 5 and other structures, without the need for staff to open and clean the bags, effectively reducing the labor intensity of the staff and avoiding personal injury; in conjunction with the crane 3 and the weighing module, after releasing part of the powder, the raw material bag 2 is lifted and then lowered again, which can open the pleated position and shake the raw material bag 2, so that the powder accumulated at the pleated position and the powder attached to the raw material bag 2 are shaken off and move to the lowest position of the raw material bag 2, that is, to the scratched position, so that the powder in the raw material bag 2 can flow out completely, thereby realizing the full utilization of the powder, so as to improve the accuracy of the raw material ratio when configuring the drilling fluid.

[0055] Example 2

[0056] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0057] The hopper 5 has a double-layer structure with an inner layer 51 and an outer layer 52, and there is a cavity 53 between the inner layer 51 and the outer layer 52; there is an air port above the cavity 53, and the air port is connected to a suction system, and the suction system can extract gas in the cavity 53 through the air port or fill gas into the cavity 53; a cloth bag 6 is arranged between the air port and the cavity 53, and the cloth bag 6 seals the top of the cavity 53, that is, the cloth bag 6 isolates the air port and the cavity 53, so that when the gas in the cavity 53 is extracted, the powder can be intercepted by the cloth bag 6 when absorbing the raised powder; the bottom of the cavity 53 is connected to the inside of the small diameter end 54 of the hopper 5 through the discharge hole 55; a feed hole 56 is opened on the inner layer 51.

[0058] In the above embodiment, after the raw material bag 2 is opened, the controller controls the crane 3 to lift the raw material bag 2 for a distance, and the powder in the raw material bag 2 flows out under the action of its own gravity, which will generate dust. At the same time, the suction system performs air extraction, and the raised powder flows into the cavity 53 through the feed hole 56; the powder entering the cavity 53 will collide with the outer layer 52 or the baffle 57 described below, and the relatively large particles of powder will automatically settle under the action of its own gravity, fall into the cavity 53 and slide along the cavity 53, and flow into the small diameter end 54 from the discharge hole 55, and then follow the powder in the hopper 5 into the feeding funnel 9 in the mud preparation system; The lighter powder moves toward the air outlet along with the air flow of the vacuum, and is intercepted by the cloth bag 6 and deposited in the cloth bag 6; the suction system is connected to the controller, and the controller sets the time interval, such as 5 minutes, to control the suction system to change from the vacuum state to the inflation state, so that the cloth bag 6 can be back-blown by inflation; the inflation state is preferably a pulse inflation state, so that the cloth bag 6 can shake, and then shake off the powder attached to the cloth bag 6, and the powder enters the cavity 53 and flows into the small diameter end 54 of the hopper 5 from the discharge port driven by the inflation airflow, and then follows the powder in the hopper 5 into the feeding funnel 9 in the mud preparation system.

[0059] Through the description of the above steps, it can be known that the raised powder can be absorbed and recycled. On the one hand, the raised powder can be effectively removed, thereby reducing the severity of dust phenomenon caused by the powder, thereby reducing the pollution caused to the environment; on the other hand, the powder can be recycled and fully utilized to improve the accuracy of the raw material ratio when the drilling fluid is configured.

[0060] Example 3

[0061] Based on Example 2, a specific implementation method that can be implemented is further proposed.

[0062] A feasible implementation method is that the small diameter end 54 is a straight section, and the cavity 53 is connected to the straight section through the discharge hole 55; on the one hand, the straight section is convenient for assembling the flange, and then convenient for sealing connection with the feeding funnel 9 in the mud preparation system through the flange; on the other hand, the small diameter end 54 is a straight section, and the discharge hole 55 is opened on the wall of the straight section, and the direction of the inflated airflow flowing out of the discharge hole 55 is along the radial direction of the straight section. Compared with the discharge hole 55 opened in the inner layer 51, it will not cause the powder to generate dust again.

[0063] In a feasible implementation, a baffle 57 is provided at each feed hole 56, the baffle 57 is located in the cavity 53 and is installed on the inner layer 51, and the fixed connection position of each baffle 57 is located above the corresponding feed hole 56; the projection of the baffle 57 on the inner layer 51 covers part or all of the feed hole 56; the baffle 57 is provided so that the process of absorbing raised dust will not be affected during air extraction; however, during inflation, the baffle 57 can close the feed hole 56 or cause the inflation airflow to flow in a direction away from the feed hole 56, effectively preventing the inflation airflow from carrying dust out of the feed hole 56 during inflation. The specific connection method of the baffle 57 has at least the following two implementation methods

[0064] In the first embodiment, the baffle 57 can be rotatably connected to the inner layer 51 via a rotating shaft; when vacuuming, the baffle 57 rotates in the direction away from the feed hole 56 to open the feed hole 56 without affecting the absorption of raised dust; when inflating, the baffle 57 rotates in the direction of the feed hole 56 to close the feed hole 56 to prevent the inflation airflow from carrying dust out of the feed hole 56 during inflation; in this embodiment, the projection of the baffle 57 on the inner layer 51 preferably covers the entire feed hole 56.

[0065] In the second embodiment, the baffle 57 can be fixedly connected to the inner layer 51 by welding, and there is an angle between the baffle 57 and the inner layer 51; when vacuuming, the baffle 57 does not close the feed hole 56, and does not affect the absorption of raised dust; when inflating, the baffle 57 prompts the inflation airflow to flow in the direction away from the feed hole 56, effectively preventing the inflation airflow from flowing out of the feed hole 56 with dust during inflation; in this embodiment, the angle is preferably 10°, and the projection of the baffle 57 on the inner layer 51 covers part or all of the feed hole 56.

[0066] In a feasible implementation manner, the feed hole 56 is opened above the connection position between the bag breaking cone 50 and the hopper 5; this setting conforms to the physical phenomenon of dust floating upward when dusting occurs, and at the same time achieves the purpose of reducing the possibility of powder blocking the feed hole 56.

[0067] A feasible implementation method is that the suction system includes an exhaust pipe 8 and an inflation pipe 7. The exhaust pipe 8 is connected to an exhaust pump 81, and an exhaust airflow is provided by the exhaust pump 81; the inflation pipe 7 is connected to an inflation pump or is connected to the drilling rig main engine air pipeline through a pulse solenoid valve 71, and an inflation airflow is provided by the inflation pump or the drilling rig main engine air pipeline.

[0068] Furthermore, the vacuum pump 81 and the charging pump pulse solenoid valve 71 are both connected to a controller, and the controller controls the state of the direction of the airflow; the control operation of the controller can also be achieved through manual remote operation.

[0069] It should be noted that the purpose of selecting the pulse electromagnetic valve 71 is to realize a pulsed inflation airflow, so that the bag 6 can vibrate under the action of the inflation airflow.

[0070] In a feasible implementation manner, there are multiple air inlets, and the multiple air inlets are distributed in a circumferential array with the axis of the hopper 5 as the center, so that the air flow is evenly distributed in the cavity during the air extraction and inflation process.

[0071] Furthermore, the hopper 5 is in the shape of a quadrangular pyramid, and each of the four directions of the quadrangular pyramid hopper 5 has a cavity 53 . The circumferential array of air ports enables each of the cavities 53 in each direction of the hopper to be affected by the airflow.

[0072] It should be noted that the air inlet used for inflation and the air inlet used for exhaustion can be the same air inlet or different air inlets; when they are different air inlets, the air inlet used for inflation and the air inlet used for exhaustion are located on the same side of the cloth bag so that they can both act on the cloth bag 6.

[0073] Example 4

[0074] Based on any one of the implementations in Examples 1-2, a feasible specific implementation is further proposed.

[0075] In a feasible implementation manner, the bag breaking cone 50 is a conical structure composed of a plurality of blades 501 , and the number of the blades 501 may be 3, 4 or more.

[0076] In a feasible implementation manner, one end of the hanging beam 11 is located outside the frame 1, so that the raw material bags 2 can be installed outside the frame 1, which is convenient for stacking and installing the raw material bags 2; the other end of the hanging beam 11 is fixed to one side of the frame 1, and the hanging beam 11 spans the other side of the frame 1, thereby improving the connection stability and the ability to resist bending moment of the hanging beam 11.

[0077] A feasible implementation manner is that a limit member is provided on the hanging beam 11, and the crane 3 is located directly above the loading platform 4 when it contacts the limit member; the limit member limits the movement of the crane; preferably, the limit member is a limit switch, and the limit switch is connected to the controller, and by setting the position of the limit switch, the crane 3 can be positioned at a determined position, that is, directly above the hopper 5.

[0078] Example 5

[0079] like Figure 1-Figure 6 As shown, a method for opening a drilling fluid raw material bag, using the bag opening machine for opening the drilling fluid raw material bag 2 described in the above embodiment, comprises the following steps:

[0080] S1: The crane 3 has a weighing module; the raw material bag 2 is fixed to the traction end of the crane 3. After the controller controls the crane 3 to lift the raw material bag 2, it moves along the hanging beam 11 with the raw material bag 2 until the crane lifts the raw material bag to the target position, that is, until the crane 3 touches the contact switch.

[0081] S2: Control the crane 3 to stop moving, and control the raw material bag under the crane 3 after the crane stops steadily; specifically, the contact switch generates a signal after being touched, and transmits the signal to the controller, and the controller controls the crane 3 to stop moving. After the crane 3 stops steadily, the controller controls the crane 3 to lower the raw material bag 2.

[0082] S3: The raw material bag 2 enters the hopper 5 and is punctured by the bag breaking cone 50 under the action of its own gravity, completing the opening of the raw material bag 2; it should be noted that the raw material bag 2 is not completely lowered, so that the force on the raw material bag 2 is only the lifting force of the crane 3, so that the subsequent weight module can obtain the remaining weight of the raw material bag 2.

[0083] S4: Occurs simultaneously with step S3, and controls the vacuum pump 81 to work, and the vacuum pump 81 extracts the gas in the cavity 53 through the vacuum pipe 8; specifically, the controller controls the vacuum pump 81 to work, and the vacuum pump 81 extracts the gas in the cavity 53 through the vacuum pipe 8; the vacuum pump 81 can be started before the raw material bag 2 is punctured by the bag breaking cone 50, that is, when the contact switch generates a signal, the controller can simultaneously control the vacuum pump 81 to work; this method can provide an environment with vacuum airflow in advance.

[0084] S5: After the bag is opened in step S3, the controller controls the crane 3 to lift the raw material bag 25 cm. The powder in the raw material bag 2 flows out under its own gravity and enters the feeding funnel 9 in the mud preparation system through the hopper 5 to prevent the bag body of the raw material bag 2 from blocking the small diameter end 54 of the hopper 5.

[0085] S6: At the same time as step S5, the outflowing powder generates dust. The raised powder enters the cavity 53 through the feed hole 56 under the action of the airflow provided by the vacuum pump 81 and is intercepted by the cloth bag 6.

[0086] S7: The controller controls the pulse solenoid valve 71 to open at an interval of 5 minutes, and then controls the vacuum pump 81 to close. The airflow flowing out from the pulse solenoid valve 71 inflates the cavity 53 through the inflation pipe 7. The pulse back-blowing of the cloth bag 6 causes the cloth bag 6 to shake off the powder. Driven by the inflation airflow, the powder flows from the discharge port into the small-diameter end 54 of the hopper 5, and then enters the feeding funnel 9 in the mud preparation system.

[0087] S8: After the pulse electromagnetic valve 71 is opened for 30 seconds, the controller controls the vacuum pump 81 to open, and then closes the pulse electromagnetic valve 71 to absorb the raised powder again.

[0088] It should be noted that, in step S7, the closing and opening sequence of the vacuum pump 81 and the closing and opening sequence of the pulse electromagnetic valve 71 is preferred, which can effectively reduce the window time for absorbing and raising powder.

[0089] S9: The weighing module of the crane 3 detects the weight of the raw material bag 2 (since the raw material bag 2 is not completely lowered and is not supported by the hopper 5, but only by the lifting force from the crane 3, the weight data of the powder can be effectively obtained). After the weight of the raw material bag 2 is reduced to the set weight (exemplarily, the set weight of the raw material bag 2 can be 1 / 2, 1 / 4, 1 / 8, 1 / 16, 1 / 32, or 1 / 64 of the initial weight, and the number of times can be set according to the material weight), the controller controls the crane 3 to lift the raw material bag 2 to 10 cm and then lower it again; this step can open the fold position and shake the raw material bag 2 (the shaking comes from the lifting and lowering process of the raw material bag 2, and the vibration of the crane 3), so that the powder accumulated at the fold position and the powder attached to the raw material bag 2 are shaken off.

[0090] S10: Perform step S9 in sequence according to the proportional value proposed in step S9 (the proportion of the initial weight of the raw material bag 2), and the set weight is gradually reduced each time; until the weighing module detects that the weight of the raw material bag 2 is only the weight of the bag body or is within the error range of the detected bag body weight, the controller controls the vacuum pump 81 to close, the pulsating solenoid valve to close, and controls the crane 3 to move the bag body away from the specified position; and all bag opening operations on the raw material bag 2 are completed.

[0091] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A bag opening machine for opening bags of drilling fluid raw materials, characterized in that: The machine comprises a frame (1), a hanging beam (11) is fixed on the top of the frame (1), a crane (3) is mounted on the hanging beam (11) and can move along the length direction of the hanging beam (11), the crane (3) has a weighing module, and the crane (3) drives the raw material bag to move up and down according to the weight of the raw material bag obtained by the weighing module; A feeding platform (4) is arranged in the frame (1), and the feeding platform (4) is located below the suspension beam (11). A funnel-shaped hopper (5) is provided on the top of the feeding platform (4), and the small-diameter end (54) of the hopper (5) is connected to the feeding funnel (9) in the mud preparation system; a bag breaking cone (50) is arranged in the hopper (5), and the tip of the bag breaking cone (50) faces the large-diameter end of the hopper (5).

2. The bag opening machine according to claim 1, characterized in that: The hopper (5) is a double-layer structure having an inner layer (51) and an outer layer (52), wherein a cavity (53) is formed between the inner layer (51) and the outer layer (52); an air port is formed above the cavity (53), and the air port is connected to a suction system, wherein the suction system can extract gas from the cavity (53) or fill gas into the cavity (53); a cloth bag (6) is provided between the air port and the cavity (53), and the cloth bag (6) seals the upper part of the cavity (53); the lower part of the cavity (53) is connected to the inside of the small-diameter end (54) of the hopper (5) through a discharge hole (55); and a feed hole (56) is provided on the inner layer (51).

3. The bag opening machine according to claim 2, characterized in that: The small diameter end (54) is a straight section, and the cavity (53) is connected to the straight section through the discharge hole (55).

4. The bag opening machine according to claim 2, characterized in that: A baffle (57) is provided at each feed hole (56), the baffle (57) being located in the cavity (53) and mounted on the inner layer (51), and the position where each baffle (57) is fixedly connected is located above the corresponding feed hole (56); the projection of the baffle (57) on the inner layer (51) covers part or all of the feed hole (56).

5. The bag opening machine according to claim 2, characterized in that: The feed hole (56) is opened above the connection position between the bag breaking cone (50) and the hopper (5).

6. The bag opening machine according to claim 2, characterized in that: The suction system comprises an air suction pipe (8) and an air charging pipe (7); the air suction pipe (8) is connected to an air suction pump (81); the air charging pipe (7) is connected to an air charging pump or is connected to a drilling rig main engine air line via a pulse solenoid valve (71).

7. The bag opening machine according to claim 2, characterized in that: There are multiple air ports, and the multiple air ports are distributed in a circumferential array with the axis of the hopper (5) as the center.

8. The bag opening machine according to claim 1, characterized in that: The bag breaking cone (50) is a cone-shaped structure composed of a plurality of blades (501).

9. The bag opening machine according to claim 1, characterized in that: A limiting member is provided on the hanging beam (11), and when the crane (3) contacts the limiting member, it is located directly above the feeding platform (4).

10. A method for opening a drilling fluid raw material bag, using the bag opening machine for opening a drilling fluid raw material bag according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Fix the raw material bag (2) at the traction end of the crane (3), control the crane (3) to lift the raw material bag (2), and then move the raw material bag (2) along the lifting beam (11) until the crane (3) lifts the raw material bag (2) to the target position; S2: Control the crane (3) to stop moving, and after the crane (3) stops steadily, control the raw material bag (2) below the crane (3); S3: the raw material bag (2) enters the hopper (5) and is punctured by the bag breaking cone (50) under the action of its own gravity, completing the opening of the raw material bag (2); S4: simultaneously with step S3, the air pump (81) is controlled to operate, and the air pump (81) extracts the gas in the cavity (53) through the air extraction pipe (8); S5: After the bag is opened in step S3, the crane (3) is controlled to lift the raw material bag (2) for a certain distance, and the powder in the raw material bag (2) flows out under its own gravity and enters the feeding funnel (9) in the mud preparation system through the hopper (5); S6: At the same time as step S5, the outflowing powder generates dust. The raised powder enters the cavity (53) through the feed hole (56) under the action of the airflow provided by the vacuum pump (81), and is intercepted by the bag (6); S7: At an interval setting time, the pulse electromagnetic valve (71) is controlled to open, and then the air pump (81) is controlled to close. The airflow flowing out of the pulse electromagnetic valve (71) passes through the air charging pipe (7) to inflate the cavity (53). The pulse back-blowing of the cloth bag (6) causes the cloth bag (6) to shake off the powder. Driven by the air charging airflow, the powder flows from the discharge port into the small diameter end (54) of the hopper (5), and then enters the feeding funnel (9) in the mud preparation system. S8: After the pulse electromagnetic valve (71) is opened for a set time, the vacuum pump (81) is controlled to be opened, and then the pulse electromagnetic valve (71) is closed to absorb the raised powder again; S9: The weighing module of the crane (3) detects the weight of the raw material bag. When the weight of the raw material bag is reduced to a set weight, the crane (3) is controlled to lift the raw material bag (2) to a set height and then lower it again; S10: Step S9 is performed multiple times, with the set weight being gradually reduced each time; until the weighing module detects that the weight of the raw material bag is only the weight of the bag body or is within the error range of the detected bag weight, the vacuum pump (81) is controlled to be closed, the pulsating solenoid valve is closed, and the crane (3) is controlled to move the bag body away from the specified position; and all bag opening operations on the raw material bag (2) are completed.

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