A bag opening machine and a bag opening method for opening a drilling fluid raw material bag

Abstract

The application discloses a bag opening machine and a bag opening method for drilling fluid raw material bags, 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 along the length direction of the hanging beam is installed on the hanging beam, the crane has a weighing module, the crane drives the raw material bag to ascend and descend according to the weight of the raw material bag obtained by the weighing module, a feeding rack is arranged in the rack, the feeding rack is located below the hanging beam, the feeding rack has a funnel-shaped hopper at the top, the small-diameter end of the hopper is connected with a feeding funnel in a 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. The method applies the bag opening machine. The application can realize complete utilization of powder, improve the accuracy of raw material proportioning during drilling fluid preparation, and reduce the labor intensity of personnel, environmental pollution and personal injury caused by dust raising.

Description

Technical Field

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

[0002] In oil and gas field drilling and production, drilling fluid (mud) plays a crucial role as the lubricant of the entire drilling system. During drilling, various raw materials are frequently added through a funnel to prepare the drilling fluid for the required drilling process. These raw materials are usually powdery materials packaged in large bags, typically one ton in size. According to standards, these raw material bags generally have two layers: an outer woven bag and an inner high-strength polyethylene film bag. Currently, there are two common methods for opening these bags at the well site: using a bag-breaking cone or directly cutting open the raw material bag with a knife. Both methods have similar drawbacks: firstly, workers need to manually clean the bags, which is physically demanding due to the large volume and weight of the raw material bags; secondly, the powdery nature of the materials easily generates dust, causing dust pollution that harms both the environment and the health of the workers.

[0003] To solve the aforementioned technical problems, technicians learned that Chinese patent CN218950520U discloses an automatic feeding device, and Chinese patent CN213995692U discloses a drilling fluid mixing system and an automatic feeding device. Both of these documents solve the problems of automatic bag breaking, screening, and feeding of small bag materials and ton bag materials, improving the feeding speed and mixing efficiency, and avoiding workers' exposure to large amounts of dust. However, specific research revealed that the solutions disclosed in the above two documents cannot fully utilize the powder. This is mainly due to at least one major defect: after the bag is broken, because the bag is placed directly inside the hopper, the flexible bag will wrinkle, resulting in a small amount of powder adhering to the bag or accumulating inside the bag, meaning that the powder cannot be completely released.

[0004] Therefore, technical personnel need to propose a new solution to the aforementioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems by providing a bag-opening machine and method for opening drilling fluid raw material bags. This method aims to reduce labor intensity, minimize environmental pollution from dust, and reduce personal injury to personnel, while achieving complete utilization of powder materials and improving the accuracy of raw material ratios during drilling fluid preparation.

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

[0007] Furthermore, the crane is connected to the controller, meaning that both the weighing module and the crane's drive device are connected to the controller.

[0008] Furthermore, the hopper has a double-layer structure with an inner layer and an outer layer, with a cavity between the inner and outer layers; an air inlet is located above the cavity, and the air inlet is connected to a suction system, which can extract gas from the cavity or fill the cavity with gas; a cloth bag is provided between the air inlet and the cavity, and the cloth bag seals the upper part of the cavity; the lower part of the cavity is connected to the interior of the small-diameter end of the hopper through a discharge hole; and a feed hole is provided on the inner layer.

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

[0010] Furthermore, a baffle is provided at each feed hole. The baffle is located inside the cavity and installed on the inner layer, and the fixed connection position of each baffle 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 located above the connection point between the bag-breaking cone and the hopper.

[0012] Furthermore, the suction system includes an air extraction pipe and an air filling pipe, wherein the air extraction pipe is connected to an air extraction pump; and the air filling pipe is connected to an air filling pump or connected to the air pipeline of the drilling rig main unit via a pulse solenoid valve.

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

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

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

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

[0017] Furthermore, the lifting beam is equipped with a limiting component, and the crane is positioned directly above the feeding platform when it contacts the limiting component.

[0018] Furthermore, the limiting component 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 aforementioned bag-opening machine, includes the following steps:

[0020] S1: Secure the raw material bag to 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 position;

[0021] S2: Control the crane to stop moving, and control the raw material bag below the crane after the crane has come to a complete stop;

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

[0023] S4: Occurs simultaneously with step S3, controlling the air pump to work, and the air pump draws gas from the cavity through the air extraction pipe.

[0024] S5: After opening the bag in step S3, control the crane to lift the raw material bag a certain distance. The powder in the raw material bag flows out under its own gravity and enters the feeding funnel of the mud preparation system through the hopper.

[0025] S6: Occurs simultaneously with step S5, dust is generated from the outflowing powder. The dust is drawn into the cavity through the feed hole by the airflow provided by the vacuum pump and is intercepted by the filter bag.

[0026] S7: At set intervals, control the pulse solenoid valve to open, and then control the air pump to close. The airflow from the pulse solenoid valve inflates the cavity through the air inflator. The pulse-type back-blowing of the filter bag causes the filter bag to shake off the powder. The powder flows from the outlet into the small diameter end of the hopper under the action of the airflow, and then into the feeding funnel of the mud preparation system.

[0027] S8: After the pulse solenoid valve is opened for a set time, the air pump is turned on, and then the pulse solenoid valve is turned off to absorb the dust that has been raised.

[0028] S9: The crane's weighing module detects the weight of the raw material bag. Once the weight of the raw material bag decreases 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: Repeat step S9 multiple times, with the set weight decreasing each time; until the weighing module detects that the weight of the raw material bag is only the weight of the bag body or within the error range of the detected bag weight, control the air pump to shut down, the pulsating solenoid valve to shut down, and control the crane to move the bag body away from the designated position; complete all bag opening operations for the raw material bag.

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

[0031] 1. This invention enables automatic opening of raw material bags through structures such as a crane, bag-breaking cone, and hopper, eliminating the need for workers to open and clean the bags, effectively reducing the labor intensity of personnel and preventing personal injury.

[0032] 2. By setting up an air pump in the suction system, the present invention can effectively remove the dust that is raised, thereby reducing the severity of dust pollution and thus reducing the pollution to the environment.

[0033] 3. By setting up a cavity, a cloth bag, and an air inlet pipe and pulse solenoid valve in the suction system, the present invention can effectively shake off the powder intercepted on the cloth bag and send it into the feeding funnel in the mud preparation system through the discharge port to achieve recycling and reuse, thereby achieving complete utilization of the powder and improving the accuracy of raw material ratio when preparing drilling fluid.

[0034] 4. In the device and method disclosed in this invention, in conjunction with a crane and a weighing module, after releasing part of the powder, the operation of lifting the raw material bag and then lowering it again can open the pleats and shake the raw material bag, causing the powder accumulated at the pleats and the powder attached to the raw material bag to fall off and move to the lowest position of the raw material bag, that is, to the puncture 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 preparing drilling fluid. Attached Figure Description

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

[0036] Figure 1 This is a schematic diagram of the bag-opening machine disclosed in this invention;

[0037] Figure 2 This is a schematic diagram of the air extraction process;

[0038] Figure 3 for Figure 2 Enlarged view of point A in the middle;

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

[0040] Figure 5This is a schematic diagram showing the arrangement of the extraction and inflation pipes.

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

[0042] The diagram shows the following markings: 1-Frame; 11-Lifting beam; 2-Raw material bag; 3-Cycling machine; 4-Feeding platform; 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-Inflation pipe; 71-Pulse solenoid valve; 8-Extraction pipe; 81-Extraction pump; 9-Feeding funnel. Detailed Implementation

[0043] In the description of this specification, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0044] Furthermore, the use of terms such as "horizontal" or "vertical" in this specification does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "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 expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” should be interpreted broadly. For example, a link can be a fixed link, a detachable link, or an integral link; it can be a mechanical link or an electrical link; it can be a direct link or an indirect link through an intermediate medium; it can be a connection within two components.

[0046] Example 1

[0047] like Figures 1-6As shown, a bag-opening machine for drilling fluid raw material bags includes a frame 1. A lifting beam 11 is fixed to the top of the frame 1. A crane 3, which can move along the length of the lifting beam 11, is installed on the lifting beam 11. The crane 3 has a weighing module. The crane 3 can be equipped with an electric hoist, which can have weighing capacity. Alternatively, a gravity sensor can be installed at the foremost position of the lifting rope in the electric hoist to enable the crane 3 to have a weighing module, thereby enabling the crane 3 to obtain the weight of the raw material bag 2. The weighing module or gravity sensor is connected to the control... The device is connected to transmit the acquired weight data to the controller; a feeding platform 4 is provided inside the frame 1, which is located below the lifting beam 11; the top of the feeding platform 4 has a funnel-shaped hopper 5, 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 flange connection conventional in the art to avoid powder leakage; a bag-breaking cone 50 is provided inside the hopper 5, the tip of the bag-breaking cone 50 facing the large diameter end of the hopper 5, to puncture the raw material bag 2 moving from top to bottom.

[0048] In this embodiment, the crane 3 is connected to the controller, that is, both the weighing module and the driving device of the crane 3 are 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 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 raw material bag 2 includes the weight of the bag body and the weight of the powder inside the bag. The weight of the powder is a variable. Detecting the weight of the raw material bag actually means detecting the weight of the powder inside the bag.

[0050] The bag-opening machine works as follows:

[0051] The raw material bag 2 is fixed to the traction end of the crane 3. The controller controls the crane 3 to lift the raw material bag 2 and move it along the lifting beam 11 until the crane 3 reaches the designated position, that is, directly above the hopper 5. The controller controls the crane 3 to stop moving. After the crane 3 stops, the controller controls the crane 3 to lower the raw material bag 2. The raw material bag 2 enters the hopper 5 and is punctured by the bag-breaking cone 50 under its own weight, completing the opening of the raw material bag 2. The powder inside the raw material bag 2 flows out under its own weight and enters 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 decreases 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 and lowering operations, the set weight is gradually reduced each time, which can continuously open the pleats and shake the raw material bag 2, so that the powder accumulated at the pleats 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 controller can also be operated remotely by humans.

[0053] It should be noted that during the entire process, the raw material bag 2 was not completely lowered, so that the force on the raw material bag 2 was only the lifting force of the crane 3, so that the weight module could obtain the remaining weight of the raw material bag 2 later.

[0054] In this embodiment, the automatic opening of the raw material bag 2 can be achieved through the crane 3, the bag-breaking cone 50, the hopper 5, and other structures, eliminating the need for manual bag opening and cleaning, effectively reducing the labor intensity of personnel and preventing personal injury. In conjunction with the crane 3 and the weighing module, after releasing part of the powder, the operation of lifting the raw material bag 2 and then lowering it again can open the pleats and shake the raw material bag 2, causing the powder accumulated at the pleats and attached to the raw material bag 2 to fall off and move to the lowest position of the raw material bag 2, that is, to the tear position, so that the powder in the raw material bag 2 can flow out completely, thereby achieving complete utilization of the powder and improving the accuracy of the raw material ratio when preparing drilling fluid.

[0055] Example 2

[0056] Based on Example 1, further feasible implementation methods are proposed.

[0057] The hopper 5 has a double-layer structure with an inner layer 51 and an outer layer 52, with a cavity 53 between the inner layer 51 and the outer layer 52. An air inlet is located above the cavity 53, connected to a suction system. The suction system can extract gas from the cavity 53 or fill the cavity 53 with gas through the air inlet. A cloth bag 6 is placed between the air inlet and the cavity 53, sealing the top of the cavity 53. This cloth bag 6 isolates the air inlet from the cavity 53, allowing the cloth bag 6 to intercept powder particles when extracting gas from the cavity 53 and absorbing any raised powder particles. The lower part of the cavity 53 is connected to the interior of the small-diameter end 54 of the hopper 5 through a discharge hole 55. A feed hole 56 is provided 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 a certain distance. The powder inside the raw material bag 2 flows out under its own gravity, which will cause dust. At the same time, the suction system will pump out the air, and the dust will flow 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. The relatively large powder particles will automatically settle under their 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. Then, it will follow the powder in the hopper 5 into the feeding funnel 9 of the mud preparation system. Lighter powder moves towards the air inlet with the airflow from the suction system, is intercepted by the filter bag 6, and settles inside the filter bag 6. The suction system is connected to the controller, which controls the suction system to switch from suction to inflation at set intervals, such as 5 minutes, so that the filter bag 6 can be back-blown by inflation. The inflation state is preferably a pulse inflation state, which makes the filter bag 6 shake, thereby shaking off the powder attached to the filter bag 6. The powder enters the cavity 53 and flows from the outlet into the small diameter end 54 of the hopper 5 under the drive of the inflation airflow. Then, it follows the powder in the hopper 5 into the feeding funnel 9 of the mud preparation system.

[0059] As described above, the raised dust can be absorbed and recycled. On the one hand, this effectively removes the raised dust, thereby reducing the severity of dust pollution and thus reducing environmental pollution. On the other hand, it enables the recycling of dust, thus achieving complete utilization of the dust and improving the accuracy of raw material ratios when preparing drilling fluid.

[0060] Example 3

[0061] Based on Example 2, further feasible implementation methods are proposed.

[0062] In one feasible implementation, 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 facilitates the assembly of flanges, and thus facilitates the sealing connection with the feeding funnel 9 in the mud preparation system through the flanges. On the other hand, since the small-diameter end 54 is a straight section, the discharge hole 55 is opened on the wall of the straight section, and the direction of the airflow from 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 dust generation of powder again.

[0063] In one feasible implementation, a baffle 57 is provided at each feed hole 56. The baffle 57 is located inside the cavity 53 and 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 does not affect the process of absorbing the dust 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 baffle 57 can be connected in at least two ways.

[0064] In the first embodiment, the baffle 57 can be rotatably connected to the inner layer 51 via a rotating shaft; during air extraction, the baffle 57 rotates away from the feed hole 56, thereby opening the feed hole 56 and not affecting the absorption of the dust; during inflation, the baffle 57 rotates in the direction of the feed hole 56, thereby closing the feed hole 56 and preventing the inflation airflow from carrying dust out of the feed hole 56; in this embodiment, it is preferable that the projection of the baffle 57 on the inner layer 51 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 evacuating, the baffle 57 does not close the feed hole 56, so it does not affect the absorption of the dust. When inflating, the baffle 57 causes 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. In this embodiment, the included 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 one feasible implementation, the feed hole 56 is located above the connection between the bag breaking cone 50 and the hopper 5; this arrangement conforms to the physical phenomenon of dust rising upwards when dust occurs, and at the same time reduces the possibility of powder clogging the feed hole 56.

[0067] In one feasible implementation, the suction system includes a suction pipe 8 and an inflation pipe 7. The suction pipe 8 is connected to a suction pump 81, which provides suction airflow. The inflation pipe 7 is connected to an inflation pump or connected to the drilling rig's main air circuit line via a pulse solenoid valve 71, which provides inflation airflow.

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

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

[0070] One feasible implementation method is to have multiple air inlets, which are arranged in a circumferential array around the axis of the hopper 5, so that the airflow is evenly distributed in the cavity during the pumping and filling process.

[0071] Furthermore, the hopper 5 is a square pyramid shape, and each of the four directions of the square pyramid hopper 5 has a cavity 53. The circumferential array of air vents allows the cavity 53 above the hopper to be subjected to airflow.

[0072] It should be noted that the air inlet used for inflation and the air inlet used for deflation can be the same or different. If they are different, the air inlet used for inflation and the air inlet used for deflation should be located on the same side of the bag so that they can both act on the bag.

[0073] Example 4

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

[0075] In one feasible implementation, the bag-breaking cone 50 is a cone-shaped structure composed of multiple blades 501, and the number of blades 501 can be 3, 4 or more.

[0076] In one feasible implementation, one end of the lifting beam 11 is located outside the frame 1, which enables the raw material bag 2 to be installed outside the frame 1, facilitating the stacking and installation of the raw material bag 2; the other end of the lifting beam 11 is fixed to one side of the frame 1, and the lifting beam 11 spans across the other side of the frame 1, improving the connection stability and bending moment resistance of the lifting beam 11.

[0077] In one feasible implementation, a limiting component is provided on the lifting beam 11, and the crane 3 is located directly above the feeding platform 4 when it contacts the limiting component; the limiting component limits the movement of the crane; preferably, the limiting component is a limit switch, which is connected to the controller. By setting the position of the limit switch, the crane 3 can be positioned at a certain position, that is, directly above the hopper 5.

[0078] Example 5

[0079] like Figures 1-6 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, includes 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, and the controller controls the crane 3 to lift the raw material bag 2 and move it along the lifting beam 11 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. After the crane stops, control the raw material bag below the crane 3. Specifically, after the contact switch is touched, it generates a signal and transmits the signal to the controller. The controller controls the crane 3 to stop moving. After the crane 3 stops, 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 its own gravity, thus 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 weight module can obtain the remaining weight of the raw material bag 2 later.

[0083] S4: Occurs simultaneously with step S3, controlling the operation of the air pump 81, which extracts gas from the cavity 53 through the air extraction pipe 8; specifically, the controller controls the operation of the air pump 81, which extracts gas from the cavity 53 through the air extraction pipe 8; the air 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 operation of the air pump 81; this method can provide an environment with air extraction flow in advance.

[0084] S5: After the bag is opened in step S3, the controller controls the crane 3 to lift the raw material bag by 25cm. 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, so as to avoid the bag body of the raw material bag 2 blocking the small diameter end 54 of the hopper 5.

[0085] S6: Occurs simultaneously with step S5, dust is generated from the outflowing powder. The dust is drawn into the cavity 53 through the feed hole 56 by the airflow provided by the vacuum pump 81 and is intercepted by the cloth bag 6.

[0086] S7: The controller opens the pulse solenoid valve 71 every 5 minutes, and then closes the air pump 81. The airflow from the pulse solenoid valve 71 inflates the cavity 53 through the air inflator 7. The pulse-type back-blowing of the filter bag 6 causes the filter bag 6 to shake off the powder. The powder flows from the outlet into the small diameter end 54 of the hopper 5 under the action of the airflow, and then into the feeding funnel 9 of the mud preparation system.

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

[0088] It should be noted that in step S7, the sequence of shutting down and opening the vacuum pump 81 and shutting down and opening the pulse solenoid valve 71 is preferred, which can effectively reduce the downtime of absorbing the raised 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, it is not supported by the hopper 5, but only by the lifting force from the crane 3, so 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 (for example, the set weight of the raw material bag 2 can be 1 / 2, 1 / 4, 1 / 8, 1 / 16, 1 / 32, 1 / 64 of the initial weight, and the number of times can be set according to the weight of the material), the controller controls the crane 3 to lift the raw material bag 2 to 10cm and then lower it again. This step can open the pleated position and shake the raw material bag 2 (the shaking comes from the lifting and lowering process of the raw material bag 2, as well as the vibration of the crane 3), so that the powder accumulated at the pleated position and the powder attached to the raw material bag 2 are shaken off.

[0090] S10: Proceed with step S9 according to the ratio (the ratio of the initial weight of raw material bag 2) proposed in step S9, and decrease the set weight each time; until the weighing module detects that the weight of raw material bag 2 is only the weight of the bag body or within the error range of the detected bag weight, the controller controls the air pump 81 to shut down, the pulsating solenoid valve to shut down, and controls the crane 3 to move the bag body away from the designated position; complete all bag opening operations of raw material bag 2.

[0091] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A bag-opening machine for opening drilling fluid raw material bags, characterized in that: Includes a frame (1), a lifting beam (11) is fixed on the top of the frame (1), and a crane (3) is installed on the lifting beam (11) that can move along the length of the lifting beam (11). The crane (3) has a weighing module, and the crane (3) drives the raw material bag to rise and fall according to the weight of the raw material bag obtained by the weighing module. The frame (1) is equipped with a feeding platform (4), which is located below the lifting beam (11). The top of the feeding platform (4) has a funnel-shaped hopper (5), 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 provided inside the hopper (5), and the tip of the bag-breaking cone (50) faces the large-diameter end of the hopper (5). The hopper (5) has a double-layer structure with an inner layer (51) and an outer layer (52). There is a cavity (53) between the inner layer (52) and the outer layer (52); the upper part of the cavity (53) has an air port, which is connected to a suction system. 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 interior of the small diameter end (54) of the hopper (5) through the discharge hole (55); the inner layer (51) is provided with a feed hole (56). Each feed hole (56) is provided with a baffle (57), which is located in the cavity (53) and 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 suction system includes a suction pipe (8) and an inflation pipe (7). The suction pipe (8) is connected to a suction pump (81). The inflation pipe (7) is connected to an inflation pump or connected to the air pipeline of the drilling rig main unit through a pulse solenoid valve (71).

2. The bag-opening machine according to claim 1, 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).

3. The bag-opening machine according to claim 1, characterized in that: The feed hole (56) is located above the connection between the bag breaking cone (50) and the hopper (5).

4. The bag-opening machine according to claim 1, characterized in that: There are multiple air inlets, and the multiple air inlets are arranged in a circumferential array with the axis of the hopper (5) as the center.

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

6. The bag-opening machine according to claim 1, characterized in that: The lifting beam (11) is equipped with a limiting component, and the crane (3) is located directly above the feeding platform (4) when it contacts the limiting component.

7. A method for opening a drilling fluid raw material bag, using the bag opening machine for opening drilling fluid raw material bags according to any one of claims 1-6, characterized in that: Includes the following steps: S1: Fix the raw material bag (2) to the traction end of the crane (3), control the crane (3) to lift the raw material bag (2), and 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. After the crane (3) stops, 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 its own gravity, thus completing the opening of the raw material bag (2); S4: Occurs simultaneously with step S3, controlling the operation of the air pump (81), the air pump (81) extracts gas from the cavity (53) through the air extraction pipe (8); S5: After the bag is opened in step S3, control the crane (3) to lift the raw material bag (2) a distance. The powder in the raw material bag (2) flows out under its own gravity and enters the feeding funnel (9) of the mud preparation system through the hopper (5). S6: Occurs simultaneously with step S5. Dust is generated in the outflowing powder. The dust is generated by the airflow provided by the air pump (81) and enters the cavity (53) through the feed hole (56), and is intercepted by the cloth bag (6). S7: At set intervals, control the pulse solenoid valve (71) to open, and then control the air pump (81) to close. The airflow from the pulse solenoid valve (71) inflates the cavity (53) through the air inflator (7). The pulse-type back-blowing bag (6) causes the bag (6) to shake off the powder. The powder flows from the outlet into the small diameter end (54) of the hopper (5) under the drive of the airflow, and then enters the feeding funnel (9) in the mud preparation system. S8: After the pulse solenoid valve (71) is opened for a set time, the air pump (81) is turned on, and then the pulse solenoid valve (71) is closed to absorb the powder that has been raised. S9: The weighing module of the crane (3) detects the weight of the raw material bag. After the weight of the raw material bag is reduced to the set weight, the crane (3) is controlled to lift the raw material bag (2) to the set height and then lower it again. S10: Repeat step S9 multiple times, with the set weight decreasing each time; until the weighing module detects that the weight of the raw material bag is only the weight of the bag body or within the error range of the detected bag weight, control the air pump (81) to shut down, the pulsating solenoid valve to shut down, and control the crane (3) to move the bag body away from the designated position; complete all bag opening operations for the raw material bag (2).

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