Grab bucket type mud sampling device with propeller

Abstract

The grab bucket type mud sampling device comprises a support, a mud sampler and the thruster, the mud sampler comprises a first jaw and a second jaw which are rotatably connected to the two sides of a middle shaft respectively, mud sampling is achieved through relative opening and closing of the first jaw and the second jaw, the mud sampler is fixedly connected with the support, and the thruster is fixedly connected with the support. The propeller is installed on the support, and the propeller is arranged in the mode that the direction of propelling force of the propeller to the support faces the opening direction when the first jaw flap and the second jaw flap are opened. After the grab bucket type mud sampling device is provided with the propeller, once the propeller is started, downward thrust can be given to the mud sampler to prevent the mud sampler from floating up possibly when the mud sampler touches a hard mud layer, so that it is guaranteed that the grab bucket can be kept at a low position for mud sampling, and mud sampling of the grab bucket is more full.

Description

Technical Field

[0001] The invention relates to an underwater sampling device, in particular to a grab-type mud sampling device with a propeller. Background Art

[0002] Grab bucket mud sampling devices are often used to collect surface mud samples of sediments (bottom mud) in rivers, lakes, reservoirs and shallow sea areas. The most commonly used grab bucket mud sampling devices include Peterson mud sampling devices, such as Figure 1 As shown, the Peterson type mud sampler includes a first jaw 2 and a second jaw 3 which are rotatably connected to both sides of a central axis 1, respectively. The tops of the first jaw 2 and the second jaw 3 are connected by an iron chain 4, and a steel wire rope 5 passes through the central axis 1 from top to bottom. The upper end of the steel wire rope 5 is fixedly connected to a hook 6, and the lower end of the steel wire rope 5 is fixed to the inner side surfaces of the first jaw 2 and the second jaw 3 in turn. When the Peterson mud sampler is in use, the iron chain 4 is hung on the hook 6 so that the first jaw 2 and the second jaw 3 are in an open state, and then the hook 6 or the wire rope 5 is fixed to the suspension rope of the winch (generally, for the convenience of disassembly, a shackle is provided on the hook 6, and the suspension rope of the winch is fixed on the shackle). The mud sampler is lowered into the water body by the winch. Once the mud sampler touches the seabed (or riverbed), the hook 6 droops and unhooks from the iron chain 4 under the action of inertia. When the winch lifts the mud sampler upward, the first jaw 2 and the second jaw 3 are closed by their own gravity and the tension of the wire rope 5, and the sediment is taken in.

[0003] In recent years, with the development of technology, electric mud samplers have also appeared, that is, the first jaw 2 and the second jaw 3 are opened or closed by a motor. However, whether it is a traditional Peterson mud sampler or an electric mud sampler, there is always a problem, that is, it is often encountered that the mud is not fully collected, which has a great impact on the efficiency of mud layer collection. Summary of the invention

[0004] The inventor has conducted a keen study on the problem of the mud sampler not being able to collect enough mud. After many experiments, the inventor finally found that the harder the mud layer at the bottom of the water, the more likely the mud sampler will not be able to collect enough mud. After analysis, whether it is a Peterson mud sampler or an electric mud sampler, mud is collected by the downward closing action of the jaws, and the mud sampler is lowered to the bottom of the water by suspension. The height of the mud sampler cannot be fixed. If the mud layer is hard, when the jaws rotate downward and close, the mud sampler is more susceptible to the upward reaction force fed back by the mud layer, causing the mud sampler to float to a certain height, which ultimately leads to the mud sampler not being able to collect enough mud.

[0005] In view of the above problems, the present invention proposes a mud sampler with a more optimized structure to solve the problem that the mud sampler cannot fully sample mud layers with higher hardness.

[0006] The present invention is implemented by the following technical solutions:

[0007] The present invention proposes a grab-type mud mining device with a propeller, comprising a bracket, a mud mining device and a propeller, wherein the mud mining device comprises a first jaw flap and a second jaw flap which are rotatably connected to both sides of a central axis, respectively, and mud mining is achieved by relative opening and closing of the first jaw flap and the second jaw flap. The mud mining device is fixedly connected to the bracket, and the propeller is mounted on the bracket. The propeller is configured such that the direction of the propulsion force of the propeller on the bracket is toward the opening direction when the first jaw flap and the second jaw flap are opened.

[0008] Preferably, the propeller comprises blades which can be rotated in a controllable manner.

[0009] Among them, preferably, the mud sampler is an electric mud sampler, including a motor arranged in the central axis for driving the first jaw flap and the second jaw flap to rotate, the bracket includes a flat plate portion and a cylindrical portion which are fixedly connected to each other, the flat plate portion is horizontally arranged above the mud sampler, the interior of the cylindrical portion is hollow, the cylindrical portion passes through the flat plate portion from top to bottom, the propeller is installed on the flat plate portion, the lower half of the cylindrical portion forms a connecting column fixedly connecting the flat plate portion and the mud sampler, the upper end portion of the cylindrical portion is higher than the propeller, and the hollow cylindrical portion forms a wiring harness sleeve.

[0010] Among them, preferably, the mud sampler is a Peterson-type mud sampler, and the flat-plate-shaped bracket is fixedly connected to the two axial ends of the central axis through a connecting plate, and a hollow portion is provided on the bracket corresponding to the upper position of the mud sampler.

[0011] Preferably, a controller is also included, and the propeller is configured such that when the first jaw flap and the second jaw flap begin to close, the controller controls the propeller to start; and when the first jaw flap and the second jaw flap are completely closed, the controller controls the propeller to close.

[0012] Preferably, it also includes an angle sensor, which detects the rotation angle signal of the first jaw flap and / or the second jaw flap and feeds it back to the controller, and the controller determines the degree of closure of the first jaw flap and the second jaw flap based on the rotation angle signal.

[0013] Among them, preferably, the mud sampler is an electric mud sampler, including a motor for controlling the rotation of the first jaw flap and the second jaw flap, and the controller can synchronously control the start of the propeller when the motor controls the first jaw flap and the second jaw flap to start rotating and closing.

[0014] Wherein, preferably, the bracket and / or the mud sampler is provided with a suspension part for connection of a suspension rope.

[0015] The present invention has the following beneficial effects: after the grab-type mud mining device of the present invention is installed with a propeller, once the propeller is started, it can give a downward thrust to the mud mining device to prevent the mud mining device from floating upward when it encounters a harder mud layer, thereby ensuring that the grab can be maintained at a lower position for mud mining, allowing the grab to mine more mud. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an existing Peterson-type mud sampler;

[0017] Figure 2 is a schematic diagram of a grab-type mud mining device with a propeller in Example 1;

[0018] Figure 3 It is a schematic diagram of the grab-type mud mining device with a thruster in Example 2. DETAILED DESCRIPTION

[0019] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0020] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0021] Embodiment 1:

[0022] See also Figure 2 As shown, as a preferred embodiment of the present invention, a grab-type mud mining device with a propeller is provided, including a bracket 10, a mud mining device 20 and a propeller 30, wherein the mud mining device 20 includes a first jaw 1 and a second jaw 2 which are rotatably connected to both sides of a central axis 3, respectively, and the first jaw 1 and the second jaw 2 form a grab, and mud mining is achieved by the relative opening and closing of the first jaw 1 and the second jaw 2. In this embodiment, the mud mining device 20 is an electric mud mining device, and the central axis 3 includes an outer shell and a motor disposed inside the outer shell, and the first jaw 1 and the second jaw 2 are driven to rotate by the motor. Two motors may be provided, and the two motors respectively control the first jaw 1 and the second jaw 2, or only one motor may be provided, and the motor simultaneously controls the rotation of the first jaw 1 and the second jaw 2 through a transmission mechanism (such as a gear transmission mechanism).

[0023] The bracket 10 is fixedly connected to the mud sampler 20, and the propeller 30 is installed on the bracket 10. The propeller 30 is implemented by a controllably rotatable blade in this embodiment. In other embodiments, the propeller 30 can also be a water jet propeller or a jet propeller. The propeller 30 is configured so that when the propeller 30 is started in the water, the propulsion direction of the propeller 30 on the bracket is toward the opening direction when the first jaw 1 and the second jaw 2 are opened. For ease of description, this embodiment uses the orientation of the grab-type mud sampling device with a propeller in the use state as the description orientation. In other words, the propeller 30 is configured so that when the propeller 30 is started in the water, the propulsion direction of the propeller 30 on the bracket is downward.

[0024] The rotation drive of the blades can be realized by a motor. The start timing of the rotation of the blades can be controlled by a controller. Specifically, when the first jaw flap 1 and the second jaw flap 2 begin to close, the controller controls the propeller 30 to start, and when the first jaw flap 1 and the second jaw flap 2 are completely closed, the controller controls the propeller 30 to close. The controller can be integrated into the bracket 10 or the mud sampler 20. Since the present embodiment adopts an electric mud sampler 20, the rotation of the first jaw flap 1 and the second jaw flap 2 and the control of the propeller 30 can be synchronously controlled by the controller. For example, the controller in the present embodiment is integrated in the central axis 3, and the controller is communicatively connected with the motor of the blades and the motors of the first jaw flap 1 and the second jaw flap 2. When the mud sampling device sinks to the bottom, a control signal is sent remotely, and the controller controls the motor of the blades and the motors of the first jaw flap 1 and the second jaw flap 2 to start at the same time. When the first jaw flap 1 and the second jaw flap 2 are completely closed, the motors of the first jaw flap 1 and the second jaw flap 2 send a signal that the mud removal action is completed (the closing rotation stroke is completed) and feedback to the controller, and the controller also controls the propeller 30 to close, or the propeller 30 can also be set to close automatically after being opened for a period of time. In addition, the operation of the propeller 30 can also be controlled by detecting the rotation angle of the first jaw flap 1 and the second jaw flap 2. For example, an angle sensor (such as a potentiometer) is set to detect the rotation of the first jaw flap 1 and / or the second jaw flap 2. The controller determines the degree of closure of the first jaw flap 1 and the second jaw flap 2 according to the rotation angle signal of the first jaw flap 1 and / or the second jaw flap 2. If the first jaw flap 1 and / or the second jaw flap 2 begins to rotate and close (or is in the process of rotating and closing), the controller controls the propeller 30 to start. If the first jaw flap 1 and / or the second jaw flap 2 is completely closed, the controller controls the propeller 30 to close.

[0025] After the grab bucket type mud mining device of this embodiment is installed with the propeller 30, once the propeller 30 is started, it can give a downward thrust to the mud mining device 20 to prevent the mud mining device 20 from floating upward when it encounters a harder mud layer, thereby ensuring that the grab bucket can maintain a lower position for mud mining, allowing the grab bucket to mine more mud.

[0026] In this embodiment, the bracket 10 includes a flat plate portion 4 and a cylindrical portion 5 which are fixedly connected to each other. The flat plate portion 4 is horizontally arranged above the mud sampler 20. The interior of the cylindrical portion 5 is hollow. The cylindrical portion 5 passes through the flat plate portion 4 from top to bottom. The propeller 30 is installed on the flat plate portion 4, and there are two propellers 30 respectively arranged on both sides of the cylindrical portion 5 to achieve a balanced propulsion effect. The lower half of the cylindrical portion 5 forms a connecting column that is fixedly connected to the flat plate portion 4 and the mud sampler 20. The upper end of the cylindrical portion 5 is higher than the propeller 30. The hollow cylindrical portion 5 forms a sleeve for a wiring harness. Various power lines and signal lines (such as the motor power line of the propeller 30, the power line of the motor of the first jaw 1 and the second jaw 2, etc.) pass upward from the cylindrical portion 5, so as to prevent the wiring harness from being entangled in the blades of the propeller 30.

[0027] The cylinder 5 is centrally arranged in this embodiment, and a suspension part 6 is also arranged at the upper end of the cylinder 5. The suspension part 6 is specifically a beam fixed to the inner cavity of the cylinder 5. The suspension part 6 is used to connect the suspension rope of the winch (or hoist), and the whole mud sampling device is lifted or lowered by retracting the suspension rope by the winch. The suspension part 6 can be another structure (such as a lifting ring), or it can be arranged at another position (such as on the mud sampling device 20), as long as it can form a lifting position.

[0028] In this embodiment, the propeller 30 is disposed above the mud sampler 20 , but in other embodiments, the propeller 30 may also be disposed on the peripheral side of the mud sampler 20 , and only adaptive changes need to be made to the bracket 10 accordingly.

[0029] Embodiment 2:

[0030] like Figure 3 This embodiment provides a grab-type mud sampling device with a thruster. This embodiment is a variation of the first embodiment, wherein the mud sampling device 20A is a Peterson-type mud sampling device (the specific structure of the Peterson-type mud sampling device can refer to the description of the background technology), and the bracket 10A is adaptively changed for the structure of the Peterson-type mud sampling device. Specifically, the flat bracket 10A is fixedly connected to the two axial ends of the central axis 3A through a connecting plate 11, and a hollow portion 12 is provided on the bracket 10A corresponding to the upper position of the mud sampling device 20A. The hollow portion 12 is used to make way for the iron chain 7, wire rope 8 and hook 9 of the mud sampling device 20A. Two thrusters 30 are respectively arranged on both sides of the hollow portion 12, and a cylindrical protective cover 13 extending at least downward is fixedly provided on the outer side of the thruster 30 to prevent the wire rope 8 from being drawn into the thruster 30.

[0031] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. A grab bucket type mud mining device with a propeller, characterized in that: It includes a bracket, a mud sampler and a propeller, wherein the mud sampler includes a first jaw flap and a second jaw flap which are rotatably connected to both sides of a central axis, and mud sampling is achieved by relative opening and closing of the first jaw flap and the second jaw flap. The mud sampler is fixedly connected to the bracket, and the propeller is mounted on the bracket. The propeller is configured such that the propulsion force of the propeller on the bracket is directed toward the opening direction of the first jaw flap and the second jaw flap when they are opened.

2. The grab bucket type mud mining device with a propeller according to claim 1, characterized in that: The propeller comprises blades which can be rotated in a controllable manner.

3. The grab bucket type mud mining device with a propeller according to claim 1, characterized in that: The mud sampler is an electric mud sampler, including a motor arranged in the central axis for driving the first jaw flap and the second jaw flap to rotate, the bracket includes a flat plate portion and a cylindrical portion fixedly connected to each other, the flat plate portion is arranged horizontally above the mud sampler, the interior of the cylindrical portion is hollow, the cylindrical portion passes through the flat plate portion from top to bottom, the propeller is installed on the flat plate portion, the lower half of the cylindrical portion forms a connecting column fixedly connecting the flat plate portion and the mud sampler, the upper end of the cylindrical portion is higher than the propeller, and the hollow cylindrical portion forms a wiring harness sleeve.

4. The grab bucket type mud mining device with a propeller according to claim 1, characterized in that: The mud sampler is a Peterson-type mud sampler, and a flat bracket is fixedly connected to the two axial ends of the central axis through a connecting plate, and a hollow portion is provided on the bracket corresponding to the upper position of the mud sampler.

5. The grab bucket type mud mining device with a propeller according to claim 1, characterized in that: It also includes a controller, and the propeller is configured such that when the first jaw flap and the second jaw flap begin to close, the controller controls the propeller to start; and when the first jaw flap and the second jaw flap are completely closed, the controller controls the propeller to close.

6. The grab bucket type mud mining device with a propeller according to claim 5, characterized in that: It also includes an angle sensor, which detects the rotation angle signal of the first jaw flap and / or the second jaw flap and feeds it back to the controller. The controller determines the degree of closure of the first jaw flap and the second jaw flap based on the rotation angle signal.

7. The grab bucket type mud mining device with a propeller according to claim 5, characterized in that: The mud sampler is an electric mud sampler, comprising a motor for controlling the rotation of the first jaw flap and the second jaw flap, and a controller can synchronously control the start of the propeller when the motor controls the first jaw flap and the second jaw flap to start rotating and closing.

8. The grab bucket type mud mining device with a propeller according to claim 1, characterized in that: The support and / or the mud sampler is provided with a suspension part for connection of a suspension rope.

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