A stirring device with a double isolation chamber structure for a high-pressure chamber

Abstract

The present invention provides a stirring device for a high-pressure chamber having a double-isolated chamber structure, comprising a cabin top drive device and an in-cabin stirring device. The cabin top drive device includes a drive mechanism, a double-chamber structure, and a compensation system; the in-cabin stirring device includes a duct structure and a stirring structure; a high-pressure chamber pressure output hydraulic pipeline receives high-pressure fluid from the high-pressure test chamber, and inputs it into two bladder-type compensators through the lower chamber and a tee. The bladder-type compensators transmit the pressure from the high-pressure test chamber to the upper and lower chambers via the upper and lower chamber pressure input hydraulic pipelines, achieving pressure balance between the upper and lower chambers and the high-pressure test chamber, and reducing the difficulty of dynamic sealing between the stirring upper shaft, the intermediate isolation plate, and the lower chamber bottom plate. The present invention achieves uniform distribution of the medium in a large-scale high-pressure chamber, prevents motors from interfering with the test environment, and does not affect experimental research inside the cold spring high-pressure chamber.

Description

Technical Field

[0001] The invention relates to the field of high-pressure stirring, and in particular to a stirring device with a double-isolated compartment structure used in a high-pressure chamber. Background Art

[0002] Cold seep chambers are scientific research equipment used to study cold seep ecosystems by simulating the environment of submarine cold seeps. Because they mimic the growth patterns of marine organisms in marine environments, cold seep chambers must be designed to maintain a stable environment and ensure water circulation. Furthermore, the presence of high-risk gases within the chambers requires protection from contact with the motors during operation, potentially causing safety hazards. Therefore, designing a stirring system capable of maintaining homogeneous conditions in the chamber is crucial to ensure smooth and efficient operation of the entire system.

[0003] General stirring devices rarely involve the stirring problem of large-scale high-pressure chambers, and it is often difficult to solve the dynamic sealing problem of stirring devices in high-pressure environments; at the same time, how to prevent the motor from interfering with the test environment is also a difficulty of the stirring device. The present invention designs a stirring device with a double isolation cabin structure for high-pressure chambers, which can achieve the purpose of stirring and homogenizing large-scale high-pressure chambers without interfering with the cold spring test environment.

[0004] The stirring device with a double-isolated compartment structure designed for a high-pressure chamber of the present invention can meet the homogeneous stirring requirements of a large-sized high-pressure test chamber by designing a double-isolated compartment structure, a compensation system and a duct structure. Summary of the Invention

[0005] The purpose of the present invention is to overcome the high-pressure underwater environment in the hyperbaric chamber and solve the problem of dynamic sealing difficulties under high-pressure environment, and to provide a stirring device with a double isolation cabin structure for the hyperbaric chamber, so as to achieve uniform distribution of the medium in the large-size hyperbaric chamber, prevent the motor from intervening in the test environment, and not affect the experimental research inside the cold spring hyperbaric chamber.

[0006] The object of the present invention is achieved as follows: it includes a cabin top drive device and an in-cabin stirring device, wherein the cabin top drive device includes a drive mechanism, a double-cabin structure and a compensation system;

[0007] The driving mechanism includes an underwater driving motor and an upper stirring shaft; the underwater driving motor is installed on the motor support plate and fixed by a threaded connection; the upper stirring shaft is connected to the output shaft of the underwater driving motor through a spline structure, passes through the upper cabin and the lower cabin and enters the high-pressure cabin, and the upper stirring shaft and each cabin are supported by water-lubricated bearings.

[0008] The double isolation cabin structure includes an upper cabin top cover, an upper cabin body, an intermediate isolation plate, a lower cabin body, a lower cabin body bottom plate and a motor support plate; the upper cabin top cover is installed with the upper cabin related hydraulic interface and the underwater drive motor control interface, and the motor support plate is fixed by bolts; the upper cabin body is connected to the upper cabin top cover and the intermediate isolation plate by bolts to form an upper cabin; the intermediate isolation plate is connected and fixed to the upper cabin body and the lower cabin body by bolts; the motor support plate is fixed to the upper cabin and the underwater drive motor respectively by bolts.

[0009] The compensation system includes a bladder compensator, a high-pressure cabin pressure output hydraulic pipeline, an upper cabin pressure input hydraulic pipeline, and a lower cabin pressure input hydraulic pipeline; the bladder compensator is tied and fixed to the outside of the upper cabin; the high-pressure cabin pressure output hydraulic pipeline connects the inside of the high-pressure cabin with the bladder compensator pressure input port via a joint; the upper cabin pressure input hydraulic pipeline connects the bladder compensator pressure output port and the upper cabin via a joint; the lower cabin pressure input hydraulic pipeline connects the bladder compensator pressure output port and the lower cabin via a joint;

[0010] The in-cabin stirring device includes a conduit structure and a stirring structure;

[0011] The catheter structure includes an upper catheter, a lower catheter, a catheter support frame and a stirring shaft support frame; the upper catheter is fixed by a threaded connection, and is connected and fixed to the lower catheter and the catheter support frame by a threaded connection; the lower catheter is fixed by a threaded connection, and is connected and fixed to the upper catheter and the catheter support frame by a threaded connection; the catheter support frame is installed on the inner wall of the high-pressure cabin, and is fixed to the high-pressure experimental cabin welding block by a threaded connection; the stirring shaft support frame is fixed inside the catheter and supports the stirring shaft through a bearing.

[0012] The stirring structure includes a stirring lower shaft, a universal joint coupling and a stirring blade; the stirring lower shaft is supported on the stirring shaft support frame through bearings and its own shaft shoulder structure; the universal shaft coupling connects the stirring upper shaft and the stirring lower shaft through holes at both ends and is fastened by locking bolts; the stirring blade is installed on the lower side of the stirring lower shaft and fixed by side screws.

[0013] The present invention also includes such structural features:

[0014] The upper and lower chambers are both designed with O-ring grooves and Gley ring grooves. The O-rings are placed in the O-ring grooves to form a static sealing structure that combines axial sealing and radial sealing to resist internal pressure; the Gley ring grooves are located on the contact surface between the upper and lower chambers and the upper stirring shaft to form a dynamic sealing structure, isolating each chamber separately to prevent the underwater drive motor from intervening in the high-pressure chamber environment.

[0015] The top of the upper cabin is designed with an underwater drive motor electrical interface and an upper cabin hydraulic interface. The underwater drive motor electrical interface is used to control the underwater drive motor and power the drive motor, and the upper cabin hydraulic interface is used to receive the high-pressure cabin pressure fluid input by the bladder compensator.

[0016] The lower cabin is designed with a high-pressure cabin pressure pipe and a lower cabin hydraulic interface. The high-pressure cabin pressure pipe passes through the lower cabin and enters the high-pressure cabin, inputting the high-pressure cabin pressure into the bladder compensator; the lower cabin hydraulic interface is used to receive the high-pressure cabin pressure input by the bladder compensator.

[0017] The conduit is located in the straight pipe section of the high-pressure chamber and is divided into two sections, the upper section of the conduit has a small diameter and the lower section has a large diameter, which can diffuse the disturbance generated by the stirring blade to the maximum extent and improve the stirring efficiency.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention adopts a double-isolation cabin structural design to isolate the underwater drive motor from the internal environment of the high-pressure cabin, preventing the underwater drive motor from interfering with the internal environment of the high-pressure cabin, improving the overall safety performance, and ensuring the smooth progress of the high-pressure test. 2. The present invention adopts a compensation system design to transmit the internal pressure of the high-pressure cabin into the upper and lower cabins through a bladder compensator, solving the problem of dynamic sealing difficulties under high-pressure environments. 3. The present invention adopts O-rings for static sealing between the various cabins, and adopts a sealing structure design that combines axial sealing and radial sealing to overcome the high-pressure underwater environment in the high-pressure cabin. 4. The present invention adopts a segmented trumpet-shaped duct design. The duct has a structural feature of being narrow at the top and wide at the bottom, which can diffuse the disturbance generated by the stirring blade to the greatest extent, and achieve uniform distribution of the medium in a large-sized high-pressure cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric view of a stirring device for a hyperbaric chamber having a double isolation chamber structure according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of the cabin top driving device of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the compensation system of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the in-cabin stirring device of the present invention;

[0023] Figure 5 is a cross-sectional view of the in-cabin stirring device of the present invention;

[0024] Figure 6a -b is a schematic diagram of the installation of the cabin top drive device of the present invention;

[0025] Figure 7a -d is a schematic diagram of the installation of the in-cabin stirring device of the present invention;

[0026] In the figure, 1-upper cabin top cover; 2-underwater drive motor; 3-bladder compensator; 4-upper cabin; 5-middle isolation plate; 6-lower cabin; 7-lower cabin bottom plate; 8-upper stirring shaft; 9-universal joint coupling; 10-lower stirring shaft; 11-duct support frame; 12-upper duct; 13-stirring blade; 14-lower duct; 15-motor support frame; 16-high-pressure cabin pressure output hydraulic pipeline; 17-upper cabin pressure input hydraulic pipeline; 18-lower cabin pressure input hydraulic pipeline; 19-duct bearing support frame; 20-high-pressure test chamber. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0028] Combine Figure 1 、 Figure 2 The upper cabin cover 1, upper cabin body 4, and intermediate isolation plate 5 form the upper cabin, while the lower cabin body bottom plate 7, lower cabin body 6, and intermediate isolation plate 5 form the lower cabin. High-pressure distilled water fills the upper and lower cabins to prevent contamination of the internal environment by the fluid. Two O-ring grooves are provided between each plate and the cabin body to form axial and radial static seals with the upper cabin body, preventing the underwater drive motor from interfering with the high-pressure test chamber environment. The upper cabin cover 1 is provided with threaded holes for mounting the motor support plate. Bolts secure each plate to the cabin body.

[0029] Combine Figure 1 、 Figure 2 The upper stirring shaft 8 is supported on the intermediate isolation plate 5 and the lower cabin bottom plate 7 by a water-lubricated bearing. The water-lubricated bearing is pressed against the intermediate isolation plate 5 and the lower cabin bottom plate 7 through a threaded connection via a bearing cover. The intermediate isolation plate 5 and the lower cabin bottom plate 7 are provided with Gley ring grooves for dynamic sealing between the upper stirring shaft 8, the intermediate isolation plate 5 and the lower cabin bottom plate 7, and to prevent leakage from affecting the high-pressure experimental chamber environment.

[0030] Combine Figure 1 、 Figure 2 、 Figure 3The high-pressure chamber pressure output hydraulic pipeline 16, the upper chamber pressure input hydraulic pipeline 17, the lower chamber pressure input hydraulic pipeline 18, and the bladder compensator 3 constitute the compensation system. The high-pressure chamber pressure output hydraulic pipeline 16 receives high-pressure fluid from the high-pressure test chamber and inputs it into the two bladder compensators 3 through the lower chamber and the tee. The bladder compensators 3 transmit the pressure from the high-pressure test chamber to the upper and lower chambers via the upper and lower chamber pressure input hydraulic pipelines 17 and 18, achieving pressure balance between the upper and lower chambers and the high-pressure test chamber 20, and reducing the difficulty of dynamic sealing between the upper stirring shaft 8, the intermediate isolation plate 5, and the lower chamber bottom plate 7.

[0031] Combine Figure 1 、 Figure 4 The upper conduit 12 and the lower conduit 14 form a conduit supported in the high-pressure test chamber 20 by three conduit support frames. The conduit is narrow at the top and wide at the bottom, ensuring that the liquid disturbance can be transmitted to the entire chamber; the three conduit support frames are connected by flange threads on the upper conduit 12 and the lower conduit 14, and are fixedly connected by 9 welding blocks located on the inner wall of the high-pressure test chamber 20.

[0032] Combine Figure 1 、 Figure 4 、 Figure 5 The lower stirring shaft 10 is mounted inside the conduit formed by the upper and lower conduits 12 and 14. The conduit bearing support 19 is located inside the conduit. The upper and lower conduits 12 and 14 are connected via a threaded connection on the conduit bearing support 19. The bearing is pressed against the conduit bearing support 19 via a bearing cover. The stirring blade 13 is fixed to the lower stirring shaft 10 via a side set screw. The rotation of the blade generates a suitable disturbance, which is then transmitted to the entire chamber by the conduit.

[0033] Combine Figure 1-7d , the present invention adopts the following installation steps:

[0034] Step 1: Install the O-ring of the lower cabin bottom plate 7 and install the lower cabin 6 through bolts, and install the hydraulic circuit in the lower cabin; install the grid ring and water-lubricated bearing of the middle isolation plate 5, and pass the upper stirring shaft 8 through the middle isolation plate 5, and press the water-lubricated bearing located on the middle isolation plate 5 through the bearing cover; install the grid ring and water-lubricated bearing of the lower cabin bottom plate 7, pass the upper stirring shaft 8 through the middle hole between the bearing and the lower cabin bottom plate 7, and press the water-lubricated bearing located on the lower cabin bottom plate 7 through the bearing cover; install the O-ring of the middle isolation plate 5 and connect the upper cabin 4 and the lower cabin 6 through bolts; Install the motor support plate 15 on the upper cabin top cover 1 and connect it to the electrical interface in the underwater drive motor cabin; install the O-ring between the upper cabin body 4 and the upper cabin top cover 1, insert the spline on the underwater drive motor 2 on the upper cabin top cover 1 into the stirring upper shaft 8, and fix the upper cabin body 4 and the upper cabin top cover 1 by bolting; install the hydraulic circuit of the compensation system outside the cabin, the high-pressure cabin pressure output hydraulic pipeline 16, the bladder compensator 3, the upper cabin pressure input hydraulic pipeline 17 and the upper cabin pressure input hydraulic pipeline 18, and the bladder compensator 3 is tied to the outer wall of the upper cabin body 4. At this point, the off-site assembly of the off-site drive device is completed. Input pressure into the high-pressure cabin pressure output hydraulic pipeline 16 and the connection surface between the lower cabin and the high-pressure cabin to test the pressure resistance, operation and sealing of the off-site drive device. Make sure that the equipment is working properly before entering the high-pressure test cabin to carry out the third step of installation;

[0035] Step 2: Install the bearing on the conduit bearing support frame 19 between the upper and lower conduits. Pass the lower agitator shaft through this conduit bearing support frame 19 and install the bearing on the shoulder of the lower agitator shaft 10. Press the bearings on both sides of the shoulder with the bearing cover. Thread the upper conduit 12, conduit bearing support frame 19, and lower conduit 14 together. Install the conduit bearing support frame 19 above the upper conduit 12, install the bearing and bearing cover, and then install the three conduit support frames 11. This completes the off-site assembly of the in-cabin agitator.

[0036] Step 3: Upon arrival at the site, while the high-pressure test chamber is still open, hoist the in-chamber stirring device into the chamber. Bolt the three conduit support frames 11 together to secure the stirring device. Install the universal joint coupling 9 on top of the stirring lower shaft 10. Install the outboard drive unit on the roof of the high-pressure test chamber 20. Insert the stirring upper shaft 8 in the outboard drive unit into the universal joint coupling 9. The installer exits from under the high-pressure test chamber 20. Installation is now complete.

[0037] The working principle of the present invention is:

[0038] The stirring device for a high-pressure chamber with a double-isolated chamber structure drives the stirring upper shaft 8 to drive the stirring lower shaft 8 through the underwater drive motor 2, so that the stirring blade 13 generates appropriate disturbances in the high-pressure test chamber 20. When it is necessary to homogenize the medium in the high-pressure test chamber, the staff inputs the voltage and electrical signal through the underwater drive motor electrical interface set on the upper chamber top cover 1 to start the entire stirring device. The driving torque is transmitted to the stirring blade 13 through the stirring upper shaft 8, the universal joint coupling 9 and the stirring lower shaft 10, realizing long-distance torque transmission. The appropriate disturbance generated by the stirring blade 13 is transmitted to the entire high-pressure test chamber 20 through the conduit composed of the upper conduit 12 and the lower conduit 14, realizing the purpose of homogenization circulation. When homogenization is not required, the staff only needs to stop inputting power to the underwater drive motor 2 to stop the operation. By controlling the electrical signals and power of the underwater drive motor, the rotational speed of the stirring blade 13 in the cabin can be controlled, and then the homogenizing effect of the high-pressure cabin can be controlled. The working principle of the compensation system of the stirring device with a double-isolation cabin structure in the high-pressure cabin is as follows: the upper cabin top cover 1, the upper cabin body 4 and the middle isolation plate 5 constitute the upper cabin, and the lower cabin body bottom plate 7, the lower cabin body 6 and the middle isolation plate 5 constitute the lower cabin. The interiors of the upper cabin and the lower cabin are filled with high-pressure distilled water, forming a double-isolation cabin structure to prevent the fluid in the cabin from contaminating the cabin environment.

[0039] High-pressure chamber pressure output hydraulic line 16 receives high-pressure fluid from the high-pressure test chamber and inputs it into two bladder compensators 3 through the lower chamber and a tee. The bladder compensators 3 transmit the pressure from the high-pressure test chamber to the upper and lower chambers via upper and lower chamber pressure input hydraulic lines 17 and 18, achieving pressure balance between the upper and lower chambers and the high-pressure test chamber 20, thus reducing the difficulty of dynamic sealing between the upper agitator shaft 8, the intermediate isolation plate 5, and the lower chamber bottom plate 7.

Claims

1. A stirring device for a hyperbaric chamber having a double isolation chamber structure, characterized in that: It includes a cabin top drive device and an in-cabin stirring device, the cabin top drive device includes a drive mechanism, a double-cabin structure and a compensation system; the drive mechanism includes an underwater drive motor and an upper stirring shaft; the underwater drive motor is installed on the motor support plate, the upper stirring shaft is connected to the output shaft of the underwater drive motor, and passes through the upper cabin and the lower cabin into the high-pressure cabin; the double-isolation cabin structure includes an upper cabin top cover, an upper cabin body, an intermediate isolation plate, a lower cabin body, a lower cabin body bottom plate and a motor support plate; the upper cabin top cover is installed with a hydraulic interface and a control interface of the underwater drive motor, and the upper cabin body is connected to the upper cabin top cover and the intermediate isolation plate by bolts to form an upper cabin; the intermediate isolation plate The plate is connected and fixed to the upper cabin body and the lower cabin body by bolts; the motor support plate is fixed to the upper cabin and the underwater drive motor respectively by bolts; the compensation system includes a bladder compensator, a high-pressure cabin pressure output hydraulic pipeline, an upper cabin pressure input hydraulic pipeline and a lower cabin pressure input hydraulic pipeline; the bladder compensator is tied and fixed to the outside of the upper cabin; the high-pressure cabin pressure output hydraulic pipeline is connected to the inside of the high-pressure cabin and the pressure input port of the bladder compensator through a joint; the upper cabin pressure input hydraulic pipeline is connected to the pressure output port of the bladder compensator and the upper cabin through a joint; the lower cabin pressure input hydraulic pipeline is connected to the pressure output port of the bladder compensator and the lower cabin through a joint.

2. The stirring device with a double-isolated compartment structure for a hyperbaric chamber according to claim 1, characterized in that: The in-cabin stirring device includes a duct structure and a stirring structure; the duct structure includes an upper duct, a lower duct, a duct support frame and a stirring shaft support frame; the upper duct is connected and fixed to the lower duct and the duct support frame through threads; the duct support frame is installed on the inner wall of the high-pressure chamber and is fixed to the high-pressure experimental chamber welding block through threaded connection; the stirring shaft support frame is fixed inside the duct and supports the stirring shaft through bearings; the stirring structure includes a stirring lower shaft, a universal joint coupling and a stirring blade; the stirring lower shaft is supported on the stirring shaft support frame through bearings and its own shaft shoulder structure; the universal shaft coupling connects the stirring upper shaft and the stirring lower shaft through two end holes and is fastened by locking bolts; the stirring blade is installed on the lower side of the stirring lower shaft and is fixed by side screws.

3. The stirring device with a double-isolated compartment structure for a hyperbaric chamber according to claim 2, characterized in that: The upper and lower chambers are both designed with O-ring grooves and Gley ring grooves. The O-rings are placed in the O-ring grooves to form a static sealing structure that combines axial sealing and radial sealing; the Gley ring grooves are located on the contact surface between the upper and lower chambers and the upper stirring shaft to form a dynamic sealing structure to isolate each chamber separately.

4. The stirring device with a double-isolated compartment structure for a hyperbaric chamber according to claim 3, characterized in that: The top of the upper cabin is designed with an underwater drive motor electrical interface and an upper cabin hydraulic interface. The underwater drive motor electrical interface is used to control the underwater drive motor and supply power to the drive motor. The upper cabin hydraulic interface is used to receive the high-pressure cabin pressure fluid input by the bladder compensator.

5. The stirring device with a double-isolated compartment structure for a hyperbaric chamber according to claim 4, characterized in that: The lower cabin is designed with a high-pressure cabin pressure pipe and a lower cabin hydraulic interface. The high-pressure cabin pressure pipe passes through the lower cabin and enters the high-pressure cabin, inputting the high-pressure cabin pressure into the bladder compensator; the lower cabin hydraulic interface is used to receive the high-pressure cabin pressure input by the bladder compensator.

6. The stirring device with a double-isolated compartment structure for a hyperbaric chamber according to claim 5, characterized in that: The conduit is located in the straight pipe section of the high-pressure chamber and is divided into two sections, the upper section of the conduit has a small diameter and the lower section has a large diameter, so as to diffuse the disturbance generated by the stirring blade to the greatest extent.

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