Negative pressure suction equipment applied to suction cylinder model test

Abstract

The invention relates to negative pressure suction equipment applied to a suction cylinder model test, which comprises a seat body, a water tank, a driving assembly and a sliding assembly, and is characterized in that the water tank is arranged on the seat body, one side of the water tank is provided with a water inlet and outlet, the other opposite side of the water tank is provided with a piston assembly, the piston assembly comprises a sealing plate and a piston, and the sealing plate is used for sealing the side part of the water tank; the piston is arranged in the water tank, and a positioning sleeve is arranged on the sealing plate. The driving assembly comprises a lead screw and a motor, and the lead screw is in threaded connection with the positioning sleeve. The driving assembly is in sliding connection with the seat body through the sliding assembly, and the sliding direction is the axial direction of the lead screw. For example, before the equipment is used, a negative pressure suction function pipeline of the suction barrel is connected to a water inlet and a water outlet of the water tank, then the motor is driven to work according to experiment requirements, transmission output is achieved through a stable structure of the lead screw, and compared with the prior art, the equipment has the advantage of being high in suction work stability.

Description

Technical Field

[0001] The invention relates to the technical field of marine suction cylinder model test equipment, and in particular to negative pressure suction equipment used for suction cylinder model test. Background Art

[0002] With the development of the world economy and the sharp increase in energy demand, the development of wind power has become the core content of many countries to promote energy transformation and the main way to cope with climate change. It is also an important means for my country to promote energy production changes. The current types of offshore wind power foundations are mainly: single pile foundation, pile-type jacket foundation, gravity foundation and suction cylinder foundation. Compared with other types of marine foundations, the suction cylinder foundation uses gas or water pumped out of the cylinder to form an internal and external pressure difference to provide penetration force. It has the advantages of short installation period, saving steel, and reusability. It has significant advantages in reducing engineering costs and recycling, so it has broad application prospects.

[0003] Most of my country's offshore waters are soft clay foundations. In order to explore the interaction between piles and soil in the suction tube foundation in clay, indoor scaled model tests can be conducted. In the clay model test, since the permeability of clay is lower than that of sand, and the size of the test model is small, in order to refine the test and better observe the penetration test, a lower and controllable suction rate is used to obtain more realistic physical characteristics of the installation process. At present, common clay suction tube installations are located in the natural atmospheric environment, or partially in the underwater environment, and are completed by air pumps and transition cabins.

[0004] Common suction devices, most of which have high-power pumps and can pump a large amount of water, are unable to complete the pumping work at extremely low suction power and cannot guarantee stable suction. The pumping power will change with the change of the pumping amount during the suction process, and there is a problem of poor stability in use. Therefore, there is an urgent need for a negative pressure suction equipment for suction cylinder model testing. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a negative pressure suction device applied to a suction cylinder model test, which has the advantage of high suction working stability.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A negative pressure suction device used in a suction cylinder model test, comprising: seat body; A water tank, the water tank is arranged on the base, a water inlet and outlet are arranged on one side of the water tank, and a piston assembly is arranged on the other side, the piston assembly comprises a sealing plate and a piston, the sealing plate is used to seal the side of the water tank, the piston is arranged inside the water tank, and a positioning sleeve is arranged on the sealing plate; A drive assembly, the drive assembly comprising a screw and a motor, the screw being threadedly connected to the positioning sleeve, one end of the screw being connected to the piston, and the other end being drivingly connected to the motor; and A sliding assembly, wherein the driving assembly is slidably connected to the seat body through the sliding assembly, and the sliding direction is the axial direction of the screw rod.

[0007] In one possible implementation manner, the drive assembly further includes a reducer, and the screw rod is drivingly connected to the motor via the reducer.

[0008] In one possible implementation, the sliding assembly includes: A linear guide rail, wherein the linear guide rail is arranged on the seat body, and a length direction of the linear guide rail is parallel to an axial direction of the lead screw; and A slider is slidably connected with the linear guide rail, and the driving assembly is fixedly arranged on the slider.

[0009] In one possible implementation manner, the slider is arranged in an L shape, the bottom of which is slidably connected to the linear guide rail, and the vertical portion is fixedly connected to the driving assembly.

[0010] In one possible implementation manner, the seat body is provided with travel switches at both ends corresponding to the linear guide rail, and the travel switches are used to shut down the motor; When the piston moves to one side of the water tank, the slider contacts one of the travel switches accordingly; when the piston moves to the other side of the water tank, the slider contacts the other travel switch accordingly.

[0011] In one possible implementation manner, the water tank includes a box body and reinforcing ribs, the piston is arranged inside the box body, and two sealing plates are provided, and the two sealing plates seal two sides of the box body; At least two reinforcing ribs are provided and arranged around the outer periphery of the box body, and two ends of the reinforcing ribs are respectively connected to the two sealing plates.

[0012] In one possible implementation manner, there are four reinforcing ribs, which are arranged around the box body.

[0013] In one possible implementation manner, the water inlet and outlet are arranged on the sealing plate away from the screw rod.

[0014] In one possible implementation manner, a stop button is provided on the side of the seat body, and the stop button is used to control the start and stop of the motor.

[0015] In one possible implementation manner, the sliding direction of the screw rod and the sliding assembly are in the same vertical plane.

[0016] The present invention adopts the above technical solution, which has the following advantages: Before using this equipment, connect the negative pressure suction function pipe of the suction cylinder to the water inlet and outlet of the water tank. Then, according to the needs of the experiment, drive the motor to work. When a constant and stable positive pressure needs to be output through the water inlet and outlet, drive the motor to rotate in the forward direction, and the motor drives the screw rod to rotate. The screw rod causes the screw rod and the drive assembly to move horizontally as a whole under the positioning limit of the positioning sleeve, thereby driving the piston to move in the direction of the water inlet and outlet, pressing the liquid medium in the water tank to pump out the water inlet and outlet, thereby outputting a constant and stable positive pressure through the water inlet and outlet.

[0017] When a constant and stable negative pressure needs to be output through the water inlet and outlet, the driving motor rotates in the direction, and the motor drives the screw rod to rotate. The screw rod causes the screw rod and the driving assembly to move horizontally as a whole under the positioning limit of the positioning sleeve, thereby driving the piston to move in the direction of the sealing plate, and the medium is pumped into the water tank through the water inlet and outlet, thereby outputting a constant and stable negative pressure through the water inlet and outlet.

[0018] By transmitting the output through the stable structure of the screw rod, the device has the advantage of higher suction working stability compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the specific structure of a negative pressure suction device in one embodiment of the present invention; Figure 2 It is a schematic diagram of the side structure of a negative pressure suction device in one embodiment of the present invention; Reference numerals: 1. Base body; 2. Water inlet and outlet; 3. Sealing plate; 4. Positioning sleeve; 5. Screw; 6. Motor; 7. Reducer; 8. Linear guide; 9. Slider; 10. Travel switch; 11. Box; 12. Control panel; 13. Stop button; 14. Reinforcement ribs. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0021] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0022] Most of my country's offshore waters are soft clay foundations. In order to explore the interaction between piles and soil in the suction tube foundation in clay, indoor scaled model tests can be conducted. In the clay model test, since the permeability of clay is lower than that of sand, and the size of the test model is small, in order to refine the test and better observe the penetration test, a lower and controllable suction rate is used to obtain more realistic physical characteristics of the installation process. At present, common clay suction tube installations are located in the natural atmospheric environment, or partially in the underwater environment, and are completed by air pumps and transition cabins.

[0023] Common suction devices, most of which have high-power water pumps and can pump a large amount of water, are unable to complete the pumping work at extremely low suction power and cannot guarantee stable suction. The pumping power will change with the change of the water pumping amount during the suction process, and there is a problem of poor stability in use. In view of the above technical problems, the present invention provides a negative pressure suction equipment used in suction cylinder model tests, which has the advantage of high stability in suction work. The technical solution of the present invention is described in detail below in conjunction with specific examples.

[0024] Reference Figure 1 as well as Figure 2 As shown, the present invention involves a negative pressure suction device used for suction cylinder model test, including a seat body 1, a water tank, a driving assembly and a sliding assembly, wherein the water tank is arranged on the seat body 1, a water inlet and outlet 2 is arranged on one side of the water tank, and a piston assembly is arranged on the other opposite side, the piston assembly includes a sealing plate 3 and a piston, the sealing plate 3 is used to seal the side of the water tank, the piston is arranged inside the water tank, and a positioning sleeve 4 is arranged on the sealing plate 3.

[0025] The driving assembly includes a screw 5 and a motor 6. The screw 5 is threadedly connected to the positioning sleeve 4, and one end of the screw 5 is connected to the piston, and the other end is transmission-connected to the motor 6. The driving assembly is slidably connected to the seat body 1 through a sliding assembly, and the sliding direction is the axial direction of the screw 5.

[0026] It should be noted that, in this embodiment, the motor 6 is used to drive the screw rod 5 to rotate as a whole, and the sliding assembly is used to limit the rotation of the motor 6. When the motor 6 drives the screw rod 5 to rotate, because the screw rod 5 is threadedly connected to the positioning sleeve 4, and the water tank is fixed to the seat body 1 as a whole, the rotation of the screw rod 5 will drive the driving assembly as a whole to slide on the seat body 1 through the sliding assembly under the guidance of the positioning sleeve 4. During the sliding process, the screw rod 5 will drive the piston to perform piston movement inside the water tank, thereby achieving a negative pressure suction effect at the water inlet and outlet 2.

[0027] Illustratively, before using the present device, the negative pressure suction function pipe of the suction cylinder is connected to the water inlet and outlet 2 of the water tank, and then the motor 6 is driven to work according to the experimental requirements. When a constant and stable positive pressure needs to be output through the water inlet and outlet 2, the motor 6 is driven to rotate in the forward direction, and the motor 6 drives the screw rod 5 to rotate. The screw rod 5, under the positioning restriction of the positioning sleeve 4, causes the screw rod 5 and the driving assembly as a whole to move horizontally, thereby driving the piston to move in the direction of the water inlet and outlet 2, pressing the liquid medium in the water tank to be pumped out of the water inlet and outlet 2, thereby outputting a constant and stable positive pressure through the water inlet and outlet 2.

[0028] When a constant and stable negative pressure needs to be output through the water inlet and outlet 2, the driving motor 6 rotates in a certain direction, and the motor 6 drives the screw rod 5 to rotate. The screw rod 5, under the positioning limit of the positioning sleeve 4, causes the screw rod 5 and the driving assembly as a whole to move horizontally, thereby driving the piston to move in the direction of the sealing plate 3, and the medium is drawn into the water tank through the water inlet and outlet 2, thereby outputting a constant and stable negative pressure through the water inlet and outlet 2.

[0029] By means of the stable structure transmission output of the screw rod 5, the device has the advantage of higher suction working stability compared with the prior art.

[0030] It should be noted that the connection structure between the screw rod 5 and the piston is a rotation connection, so the screw rod 5 can push the piston to perform piston movement inside the water tank. In addition, in order to improve the output efficiency of the equipment, two water inlets and outlets 2 are provided.

[0031] In one embodiment, the overall structure of the driving assembly is further refined, and the driving assembly further includes a reducer 7 , and the screw rod 5 is transmission-connected to the motor 6 via the reducer 7 .

[0032] In this embodiment, the reducer 7 is specifically a planetary reducer, which can be a stable reduction mode or a variable speed reduction mode. When the stable reduction mode is adopted, the planetary reducer performs a stable and constant reduction on the output of the motor 6, slowing down the rotation speed of the screw 5, so that the water tank provides a lower and controllable suction rate, obtains a more realistic physical characteristic of the suction cylinder during the installation process, and improves the overall practicality of the device.

[0033] When a variable speed reduction method is adopted, the staff can adjust the speed gear of the planetary reducer according to the actual situation, thereby adjusting the rotation speed of the screw 5, which can also enable the water tank to provide a lower and controllable suction rate and have higher flexibility of use.

[0034] In one embodiment, the overall structure of the sliding assembly is further refined, and the sliding assembly includes a linear guide rail 8 and a slider 9, wherein the linear guide rail 8 is disposed on the seat body 1, and the length direction of the linear guide rail 8 is parallel to the axial direction of the lead screw 5. The slider 9 is slidably connected with the linear guide rail 8, and the driving assembly is fixedly disposed on the slider 9.

[0035] It should be noted that, in this embodiment, the output shaft of the motor 6 is transmission-connected to the transmission component of the planetary reducer, and the housing of the motor 6 is integrally fixedly connected to the housing of the planetary reducer, and the planetary reducer is fixedly connected to the slider 9. Therefore, when the screw rod 5 rotates, the driving component can be driven by the slider 9 to slide horizontally as a whole under the guidance of the linear guide 8.

[0036] In this embodiment, specifically, the slider 9 is L-shaped, the bottom of which is slidably connected to the linear guide rail 8, and the vertical portion is fixedly connected to the drive assembly. In addition, in order to ensure the adjustment stability of the device, the screw rod 5 and the linear guide rail 8 are in the same vertical plane.

[0037] In this embodiment, it is more preferable that in order to facilitate automatic control of the adjustment stroke of the piston and prevent the motor 6 from driving the piston to move beyond the stroke of the water tank, the seat body 1 is provided with a travel switch 10 at both ends of the corresponding linear guide rail 8, and the travel switch 10 is used to shut down the motor 6.

[0038] Specifically, when the piston moves to one side of the water tank, the slider 9 contacts one of the travel switches 10 accordingly, and when the piston moves to the other side of the water tank, the slider 9 contacts the other travel switch 10 accordingly.

[0039] Through the corresponding arrangement of the structure, the movement of the piston can be limited, thereby protecting the water tank and the piston.

[0040] In one embodiment, the overall structure of the water tank is further refined. The water tank includes a box body 11 and reinforcing ribs 14 . The piston is disposed inside the box body 11 . Two sealing plates 3 are provided, and the two sealing plates 3 seal both sides of the box body 11 .

[0041] At least two reinforcing ribs 14 are provided and arranged around the outer periphery of the box body 11. The two ends of the reinforcing ribs 14 are respectively connected to the two sealing plates 3. The reinforcing ribs 14 are used to support the water tank structure to prevent deformation of the water tank structure due to excessive negative pressure generated during the suction process.

[0042] Specifically, in this embodiment, four reinforcing ribs 14 are provided and are arranged around the box body 11 .

[0043] In addition, in this embodiment, the water inlet and outlet 2 are arranged on the sealing plate 3 away from the screw rod 5 .

[0044] In one embodiment, a control panel 12 is further provided on the seat body 1, and the control panel 12 includes forward, backward and stop buttons 13, wherein forward control controls the motor 6 to rotate forward, and the water tank provides positive pressure. Backward control controls the motor 6 to rotate reversely, and the water tank provides negative pressure. At the same time, for safety reasons, a stop button 13 is provided on the side of the seat body 1, and the stop button 13 is used to control the motor 6 for emergency use.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure suction device used in a suction cylinder model test, characterized in that: include: seat body; A water tank, the water tank is arranged on the base, a water inlet and outlet are arranged on one side of the water tank, and a piston assembly is arranged on the other side, the piston assembly comprises a sealing plate and a piston, the sealing plate is used to seal the side of the water tank, the piston is arranged inside the water tank, and a positioning sleeve is arranged on the sealing plate; A drive assembly, the drive assembly comprising a screw and a motor, the screw is threadedly connected to the positioning sleeve, one end of the screw is connected to the piston, and the other end is drivingly connected to the motor; as well as A sliding assembly, wherein the driving assembly is slidably connected to the seat body through the sliding assembly, and the sliding direction is the axial direction of the screw rod.

2. The negative pressure suction device according to claim 1, characterized in that: The driving assembly also includes a reducer, and the screw rod is transmission-connected to the motor via the reducer.

3. The negative pressure suction device according to claim 1, characterized in that: The sliding assembly comprises: A linear guide rail, wherein the linear guide rail is disposed on the seat body, and a length direction of the linear guide rail is parallel to an axial direction of the lead screw; and A slider is slidably connected with the linear guide rail, and the driving assembly is fixedly arranged on the slider.

4. The negative pressure suction device according to claim 3, characterized in that: The sliding block is arranged in an L shape, the bottom of which is slidably connected to the linear guide rail, and the vertical part is fixedly connected to the driving assembly.

5. The negative pressure suction device according to claim 3, characterized in that: The seat body is provided with travel switches at two ends corresponding to the linear guide rail, respectively, and the travel switches are used to shut down the motor; When the piston moves to one side of the water tank, the slider contacts one of the travel switches accordingly; when the piston moves to the other side of the water tank, the slider contacts the other travel switch accordingly.

6. The negative pressure suction device according to claim 1, characterized in that: The water tank comprises a box body and reinforcing ribs, the piston is arranged inside the box body, two sealing plates are arranged, and the two sealing plates seal two sides of the box body; At least two reinforcing ribs are provided and arranged around the outer periphery of the box body, and two ends of the reinforcing ribs are respectively connected to the two sealing plates.

7. The negative pressure suction device according to claim 6, characterized in that: The reinforcing ribs are provided in four numbers and are arranged around the box body.

8. The negative pressure suction device according to claim 6, characterized in that: The water inlet and outlet are arranged on the sealing plate away from the screw rod.

9. The negative pressure suction device according to claim 1, characterized in that: A stop button is provided on the side of the seat body, and the stop button is used to control the start and stop of the motor.

10. The negative pressure suction device according to claim 1, characterized in that: The sliding directions of the screw rod and the sliding assembly are on the same vertical plane.

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