A buoyancy adjustment system and a pump valve assembly

Abstract

The present invention relates to the field of submersibles, and particularly to a buoyancy adjustment system and a pump valve assembly. The pump valve assembly includes a bidirectional hydraulic pump and a stop valve. The bidirectional hydraulic pump includes a pump body and a gear shaft. The pump body has a first pump port and a second pump port. The stop valve includes a valve body fixed to the right side of the pump body and a valve core coaxially arranged with the gear shaft. The valve body has a first valve port and a second valve port, and the second valve port is communicated with the first pump port. A fixed sleeve and a sliding sleeve are sleeved on the right end of the gear shaft. The left end of the valve core is rotatably assembled in the sliding sleeve to reciprocate together with the sliding sleeve. A reset elastic member is arranged between the fixed sleeve and the sliding sleeve. The reset elastic member is used to apply an elastic force to the sliding sleeve to move it to the right, so as to close the stop valve through the valve core. A centrifugal assembly is arranged in the valve body. The centrifugal assembly includes two connecting rods and a centrifugal counterweight ball. One ends of the two connecting rods are respectively hinged to the fixed sleeve and the sliding sleeve, and the other ends of the two connecting rods are both hinged to the centrifugal counterweight ball.

Description

Technical Field

[0001] The present invention relates to the field of submersibles, and particularly to a buoyancy adjustment system and a pump-valve assembly. Background Art

[0002] Submersibles are important equipment for developing and utilizing marine resources. As the core subsystem of a submersible, the buoyancy adjustment system is used to control the weight and buoyancy of the submersible to achieve functions such as hovering, depth fixation, and compensation for buoyancy changes. Among them, the seawater buoyancy adjustment system uses seawater as the working medium, has the advantages of simple structure and environmental compatibility, and has natural advantages in the use of submersibles.

[0003] The Chinese invention patent with the authorization announcement number CN106477011B discloses a buoyancy adjustment and pressure compensation system for a submersible. The system consists of components such as an elastic water bag, a two-way seawater hydraulic pump, a seawater solenoid valve, and a motor. The two-way seawater hydraulic pump is controlled to rotate forward and backward by the motor, and the motor and the seawater solenoid valve are powered by a power supply. Through the seawater solenoid valve and the two-way seawater hydraulic pump, the elastic water bag is communicated with the seawater environment so that water transfer can occur between the two.

[0004] At present, submersibles are developing in the direction of miniaturization and long endurance. However, the two-way seawater hydraulic pump and the seawater solenoid valve in the above technology need to be controlled separately, which additionally increases the energy consumption of the submersible and is not conducive to the long-endurance operation of the submersible. Summary of the Invention

[0005] The purpose of the present invention is to provide a pump-valve assembly to solve the technical problem that the two-way seawater hydraulic pump and the seawater solenoid valve in the prior art need to be controlled separately, which will additionally increase the energy consumption of the submersible; the purpose of the present invention is also to provide a buoyancy adjustment system to solve the above problems.

[0006] To achieve the above purpose, the technical solution of the pump-valve assembly of the present invention is:

[0007] The pump valve assembly includes a two-way hydraulic pump and a globe valve. The two-way hydraulic pump includes a pump body and a gear shaft rotatably assembled in the pump body. The pump body has a first pump port and a second pump port corresponding to the gears on the gear shaft. Taking the axial direction of the gear shaft as the left-right direction, the globe valve includes a valve body fixed on the right side of the pump body and a valve core arranged coaxially with the gear shaft. The valve body has a first valve port and a second valve port, and the second valve port is communicated with the first pump port through a connecting pipe. A fixed shaft sleeve and a sliding shaft sleeve are sleeved on the right end of the gear shaft at intervals in the left-right direction. The left end of the valve core is rotatably assembled in the sliding shaft sleeve and reciprocates in the left-right direction together with the sliding shaft sleeve. A reset elastic member is arranged between the fixed shaft sleeve and the sliding shaft sleeve. The reset elastic member is used to apply an elastic force to the sliding shaft sleeve to move it to the right, so as to close the globe valve through the valve core. An eccentric assembly is arranged in the valve body. The eccentric assembly includes two connecting rods and an eccentric counterweight ball. One ends of the two connecting rods are respectively hinged on the fixed shaft sleeve and the sliding shaft sleeve, and the other ends of the two connecting rods are both hinged on the eccentric counterweight ball.

[0008] The beneficial effects are as follows: In the buoyancy adjustment system of the present invention, the two-way hydraulic pump and the globe valve are fixed together, and the gear shaft of the two-way hydraulic pump is connected with the valve core of the globe valve through the fixed shaft sleeve, the sliding shaft sleeve and the eccentric assembly. When the two-way hydraulic pump is driven by a driving motor to work, the globe valve is controlled to open through the eccentric assembly. Whether the driving motor rotates forward or backward, the synchronous operation of the pump and the valve can be realized. In this process, there is no need for an electromagnet to drive the globe valve to open, reducing energy consumption and being beneficial to the long-term operation of the submersible. Moreover, the left end of the valve core is rotatably assembled in the sliding shaft sleeve, avoiding the rotation of the valve core and making the sealing surface of the valve core not easily worn, which is beneficial to improving the service life of the globe valve. In addition, the reset elastic member is compressed by centrifugal force, so that the more the reset elastic member is compressed, the larger the rotation radius of the eccentric counterweight ball, that is, the greater the centrifugal force, overcoming the problem of the contradiction between the thrust and the stroke of the electromagnet, and meeting the large opening requirement of the globe valve to reduce the pressure loss of the system.

[0009] As a further improvement, splines are provided on the outer peripheral surface of the right end of the gear shaft, and a clamping groove is provided at the left end of the splines. Spline grooves adapted to the splines are provided on the inner walls of the fixed shaft sleeve and the sliding shaft sleeve, and the fixed shaft sleeve is fixed on the gear shaft through a snap ring clamped in the clamping groove.

[0010] The beneficial effects are as follows: Such a design not only facilitates fixing the fixed shaft sleeve on the gear shaft, but also is beneficial to the sliding of the sliding shaft sleeve on the gear shaft.

[0011] As a further improvement, the reset elastic member is a reset compression spring sleeved on the gear shaft.

[0012] The beneficial effects are as follows: The reset compression spring has good elasticity, which is beneficial to meeting the stroke of the sliding shaft sleeve. Moreover, the reset compression spring is sleeved on the gear shaft, which can ensure the stability during its telescopic process.

[0013] As a further improvement, a bearing is provided at the left end of the valve core, and the left end of the valve core is rotationally assembled in the sliding shaft sleeve through the bearing.

[0014] The beneficial effect is that with such a design, the valve core is not prone to rotation, thereby avoiding wear of the sealing surface of the valve core and improving the service life of the globe valve.

[0015] As a further improvement, the bearing is a deep groove ball bearing.

[0016] The beneficial effect is that the deep groove ball bearing can withstand a certain axial load, so it can improve the service life of the bearing.

[0017] As a further improvement, at least two groups of the centrifugal components are arranged at intervals along the circumferential direction of the gear shaft.

[0018] The beneficial effect is that with such a design, the pulling force on the sliding shaft sleeve can be increased to ensure that the globe valve has a large opening degree.

[0019] As a further improvement, a buffer pad for buffering the left end of the valve core is provided on the right end face of the gear shaft.

[0020] The beneficial effect is that the buffer pad is used to buffer the left end of the valve core when the valve core moves leftward to reduce the impact force on the gear shaft.

[0021] As a further improvement, the hinge axes of the two connecting rods and the corresponding shaft sleeves are parallel to each other and perpendicular to the axis of the gear shaft.

[0022] The beneficial effect is that with such a design, there will be no component force in the acting force of the centrifugal counterweight ball pulling the sliding shaft sleeve, which is beneficial to the sliding of the sliding shaft sleeve on the gear shaft.

[0023] As a further improvement, a manhole is provided on the valve body.

[0024] The beneficial effect is that with such a design, it can not only reduce the weight of the valve body, but also facilitate the disassembly and assembly of the centrifugal components in the valve body.

[0025] To achieve the above object, the technical solution of the buoyancy adjustment system of the present invention is:

[0026] A buoyancy regulating system comprises a driving motor, a water tank and a pump-valve assembly, wherein the pump-valve assembly comprises a bidirectional hydraulic pump and a stop valve, wherein the bidirectional hydraulic pump comprises a pump body and a gear shaft rotatably assembled in the pump body, wherein the pump body has a first pump port and a second pump port corresponding to the gear on the gear shaft, wherein the second pump port is connected to the water tank through a pipeline, and the driving motor is connected to the gear shaft by transmission; with the axial direction of the gear shaft as the left and right direction, the stop valve comprises a valve body fixed to the right side of the pump body and a valve core coaxially arranged with the gear shaft, wherein the valve body has a first valve port and a second valve port, wherein the second valve port is connected to the first pump port through a connecting pipe; The right end sleeve of the gear shaft is provided with a fixed sleeve and a sliding sleeve arranged at intervals along the left and right directions. The left end of the valve core is rotatably assembled in the sliding sleeve so as to move back and forth in the left and right directions together with the sliding sleeve. A reset elastic member is provided between the fixed sleeve and the sliding sleeve. The reset elastic member is used to apply an elastic force to the sliding sleeve to move rightward so as to close the stop valve through the valve core. A centrifugal assembly is provided in the valve body. The centrifugal assembly includes two connecting rods and a centrifugal counterweight ball. One end of the two connecting rods is respectively hinged on the fixed sleeve and the sliding sleeve, and the other ends of the two connecting rods are hinged on the centrifugal counterweight ball.

[0027] The beneficial effect is as follows: the buoyancy regulating system of the present invention is achieved by fixing the bidirectional hydraulic pump and the stop valve together, and connecting the gear shaft of the bidirectional hydraulic pump and the valve core of the stop valve through a fixed sleeve, a sliding sleeve and a centrifugal assembly. When the bidirectional hydraulic pump is driven by a driving motor, the stop valve is opened by controlling the centrifugal assembly. Regardless of whether the driving motor rotates forward or reversely, the pump and the valve can work synchronously. In this process, there is no need for an electromagnet to drive the stop valve to open, which reduces energy consumption and is beneficial to the long-term operation of the submersible. Moreover, the left end of the valve core is rotatably assembled in the sliding sleeve to avoid the rotation of the valve core, so that the sealing surface of the valve core is not easily worn, which is beneficial to improving the service life of the stop valve. In addition, the centrifugal force is used to compress the reset elastic member, so that the more the reset elastic member is compressed, the larger the rotation radius of the centrifugal weight ball, that is, the greater the centrifugal force, which overcomes the contradiction between the thrust of the electromagnet and the stroke, and can meet the large opening requirement of the stop valve to reduce the pressure loss of the system.

[0028] As a further improvement, a spline is provided on the outer circumferential surface of the right end of the gear shaft, and a slot is provided on the left end of the spline; spline slots matching the splines are provided on the inner walls of the fixed sleeve and the sliding sleeve, and the fixed sleeve is fixed to the gear shaft by a retaining spring mounted in the slot.

[0029] The beneficial effect is that such a design not only facilitates fixing the fixed shaft sleeve on the gear shaft, but also facilitates the sliding shaft sleeve to slide on the gear shaft.

[0030] As a further improvement, the reset elastic member is a reset compression spring sleeved on the gear shaft.

[0031] The beneficial effects are: the reset compression spring has good elasticity, which is conducive to meeting the travel of the sliding sleeve; and the reset compression spring sleeve is arranged on the gear shaft, which can ensure its stability during the expansion and contraction process.

[0032] As a further improvement, a bearing is provided at the left end of the valve core, and the left end of the valve core is rotatably assembled in the sliding sleeve through the bearing.

[0033] The beneficial effect is that such a design makes it difficult for the valve core to rotate, thereby avoiding wear of the sealing surface of the valve core and increasing the service life of the stop valve.

[0034] As a further improvement, the bearing is a deep groove ball bearing.

[0035] The beneficial effect is that the deep groove ball bearing can bear a certain axial load, thereby increasing the service life of the bearing.

[0036] As a further improvement, the centrifugal components are arranged in at least two groups at intervals along the circumference of the gear shaft.

[0037] The beneficial effect is that such a design can increase the pulling force on the sliding sleeve to ensure that the stop valve has a larger opening.

[0038] As a further improvement, a buffer pad for buffering the left end of the valve core is provided on the right end surface of the gear shaft.

[0039] The beneficial effect is that the buffer pad is used to buffer the left end of the valve core when the valve core moves to the left, so as to reduce the impact force on the gear shaft.

[0040] As a further improvement, the hinge axes of the two connecting rods and the corresponding bushings are parallel to each other and perpendicular to the axis of the gear shaft.

[0041] The beneficial effect is that: in this design, the force of the centrifugal weight ball pulling the sliding sleeve will not have a component force, which is conducive to the sliding sleeve sliding on the gear shaft.

[0042] As a further improvement, a hand hole is provided on the valve body.

[0043] The beneficial effect is that such a design can not only reduce the weight of the valve body, but also facilitate the disassembly and assembly of the centrifugal assembly in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of a buoyancy regulating system of the present invention;

[0045] Figure 2 for Figure 1 Schematic diagram of the structure of the middle pump valve assembly;

[0046] Figure 3 for Figure 2Cross-sectional view;

[0047] Figure 4 is Figure 3 Schematic structural diagram of the gear shaft in

[0048] Figure 5 is Figure 3 Schematic structural diagram of the fixed shaft sleeve in

[0049] Figure 6 is Figure 3 Schematic structural diagram of the sliding sleeve body in

[0050] In the figure: 11, driving motor; 12, water tank; 13, pump valve assembly; 14, two-way hydraulic pump; 15, stop valve; 16, first pump port; 17, second pump port; 18, first valve port; 19, second valve port; 20, seawater; 21, gear shaft; 22, fixed shaft sleeve; 23, reset elastic member; 24, connecting pipe; 25, valve core; 26, bearing; 27, sliding sleeve body; 28, connecting rod; 29, centrifugal counterweight ball; 30, pump body; 31, valve body; 32, circlip; 33, connecting sleeve; 34, bearing installation cylinder; 35, buffer pad; 36, gear; 37, manhole; 38, spline; 39, card slot; 40, spline groove; 41, hinge ear; 42, flange plate. Specific embodiments

[0051] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0053] It should be noted that relational terms such as "first" and "second" and the like that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element. In addition, the terms "front", "rear", "upper", "lower", "left", "right" are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating that the device or component referred to must have a specific orientation, and thus should not be construed as a limitation on the present invention.

[0054] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0055] Embodiment 1 of the buoyancy adjustment system of the present invention:

[0056] As Figures 1 to 3 shown, the buoyancy adjustment system includes a drive motor 11, a water tank 12 and a pump valve assembly 13. The pump valve assembly 13 includes a two-way hydraulic pump 14 and a stop valve 15. The two-way hydraulic pump 14 includes a pump body 30 and a gear shaft 21 rotatably assembled in the pump body 30. The output shaft of the drive motor 11 is in transmission connection with the left end of the gear shaft 21. The pump body 30 has a first pump port 16 and a second pump port 17 corresponding to the gear 36 on the gear shaft 21. The second pump port 17 is communicated with the water tank 12 through a pipeline. Taking the axial direction of the gear shaft 21 as the left-right direction, the stop valve 15 includes a valve body 31 fixed on the right side of the pump body 30 and a valve core 25 arranged coaxially with the gear shaft 21. The valve body 31 has a first valve port 18 and a second valve port 19. The second valve port 19 is communicated with the first pump port 16 through a connecting pipe 24. The first valve port 18 is connected to seawater 20 through a pipeline. Among them, the opening and closing of the stop valve 15 are realized by the left-right movement of the valve core 25.

[0057] As Figure 3As shown, the right end of the gear shaft 21 extends out of the pump body 30. A fixed sleeve 22 and a sliding sleeve are sleeved on the right end of the gear shaft 21 and are arranged at intervals in the left-right direction. The sliding sleeve includes a sleeve body 27 and a bearing installation cylinder 34. The left end of the valve core 25 is rotatably assembled in the bearing installation cylinder 34 so as to reciprocate in the left-right direction together with the sliding sleeve. A reset elastic member 23 is provided between the fixed sleeve 22 and the sleeve body 27. Preferably, the reset elastic member 23 is a reset compression spring sleeved on the gear shaft 21. The reset elastic member 23 is used to apply an elastic force for the sliding sleeve to move rightward, so as to close the stop valve 15 through the valve core 25.

[0058] As Figure 6 shown, a flange plate 42 is provided at the right end of the sleeve body 27, and the bearing installation cylinder 34 is fixed to the flange plate 42 by bolts.

[0059] In this embodiment, four sets of centrifugal components are provided in the valve body 31, and the centrifugal components are evenly and spacedly arranged along the circumferential direction of the gear shaft 21. Each centrifugal component includes two connecting rods 28 and a centrifugal counterweight ball 29. One ends of the two connecting rods 28 are respectively hinged to the fixed sleeve 22 and the sleeve body 27, and the other ends of the two connecting rods 28 are both hinged to the centrifugal counterweight ball 29. When the gear shaft 21 rotates, the centrifugal counterweight ball 29 moves outward to drive the sliding sleeve to move leftward, and then the stop valve 15 is opened through the valve core 25. In other embodiments, the number of sets of centrifugal components can be set as required, such as setting one set or two sets.

[0060] In this embodiment, the centrifugal counterweight ball 29 is a stainless steel ball, which not only has a certain weight but also has a certain corrosion resistance.

[0061] As Figures 4 to 6 shown, a spline 38 is provided on the outer peripheral surface of the right end of the gear shaft 21, a card slot 39 is provided at the left end of the spline 38, and spline grooves 40 adapted to the spline 38 are provided on the inner walls of the fixed sleeve 22 and the sleeve body 27; the left end of the fixed sleeve 22 abuts against the stepped surface of the gear shaft 21, and the right end of the fixed sleeve 22 is limited by a snap ring 32 clamped in the card slot 39 to fix the fixed sleeve 22 on the gear shaft 21, and the sleeve body 27 slides reciprocally on the gear shaft 21.

[0062] As Figure 3 shown, a connecting sleeve 33 is fixed to the left end of the valve core 25, a bearing 26 is provided between the connecting sleeve 33 and the bearing installation cylinder 34, and the left end of the valve core 25 is rotatably assembled in the bearing installation cylinder 34 through the bearing 26. Preferably, the bearing 26 is a deep groove ball bearing, and the deep groove ball bearing can bear a certain axial load, so the service life of the bearing 26 can be improved.

[0063] In this embodiment, a buffer pad 35 is provided on the right end face of the gear shaft 21. The buffer pad 35 is used to buffer the left end of the valve core 25 when the valve core 25 moves leftward, so as to reduce the impact force on the gear shaft 21.

[0064] In this embodiment, the hinge axes of the two connecting rods 28 and the corresponding bushings are parallel to each other and perpendicular to the axis of the gear shaft 21. Such a design is conducive to the sliding of the sliding sleeve body 27 on the gear shaft 21.

[0065] As Figure 2 shown, a manhole 37 is provided on the valve body 31, which can not only reduce the weight of the valve body 31, but also facilitate the disassembly and assembly of the centrifugal component.

[0066] As Figure 3 、 Figure 5 and Figure 6 shown, hinge ears 41 are provided on both the fixed bushing 22 and the sliding sleeve body 27, and the connecting rod 28 is hinged on the hinge ears 41.

[0067] During operation, the two-way hydraulic pump 14 is driven by the drive motor 11. The gear shaft 21 drives the fixed bushing 22 and the sliding bushing to rotate. Under the action of the centrifugal force generated by the rotation, the centrifugal counterweight ball 29 moves radially outward along the gear shaft 21, the return elastic member 23 is compressed, the sliding bushing moves leftward, and then drives the valve core 25 to move leftward to open the stop valve 15. When the drive motor 11 does not work, the gear shaft 21 does not rotate, and the return elastic member 23 pushes the sliding bushing to move rightward, and then drives the valve core 25 to move rightward to close the stop valve 15. Among them, regardless of whether the drive motor rotates forward or backward, the stop valve 15 can be opened under the action of the centrifugal component, realizing the drainage of the water tank 12 into the seawater 20 or the injection of the seawater 20 into the water tank 12.

[0068] The buoyancy adjustment system of the present invention fixes the two-way hydraulic pump and the stop valve, and controls the opening of the stop valve through the centrifugal component when the two-way hydraulic pump is working. Regardless of whether the drive motor rotates forward or backward, the synchronous operation of the pump and the valve can be realized. There is no need for an electromagnet to drive the stop valve to open, reducing energy consumption and being conducive to the long-duration operation of the submersible. Moreover, the left end of the valve core is rotationally assembled in the sliding bushing, avoiding the rotation of the valve core, making the sealing surface of the valve core not easily worn, and being conducive to improving the service life of the stop valve. In addition, the return elastic member is compressed by centrifugal force, so that the more the return elastic member is compressed, the larger the rotation radius of the centrifugal counterweight ball, that is, the greater the centrifugal force, overcoming the problem of the contradiction between the thrust and stroke of the electromagnet, and meeting the large-opening requirement of the stop valve to reduce the pressure loss of the system.

[0069] Embodiment 2 of the buoyancy adjustment system of the present invention:

[0070] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a spline is provided on the outer peripheral surface of the right end of the gear shaft, and a clamping groove is provided at the left end of the spline; spline grooves adapted to the spline are provided on the inner walls of the fixed shaft sleeve and the sliding shaft sleeve, and the fixed shaft sleeve is fixed on the gear shaft by a circlip clamped in the clamping groove. In this embodiment, no spline is provided on the gear shaft, and the fixed shaft sleeve is welded and fixed on the gear shaft. In order to ensure the stability of the sliding shaft sleeve during the sliding process, a guiding protrusion can be welded on the outer peripheral surface of the right end of the gear shaft, and a guiding groove adapted to the guiding protrusion is machined on the inner wall surface of the sliding shaft sleeve.

[0071] Embodiment 3 of the buoyancy adjustment system of the present invention:

[0072] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the reset elastic member is a reset compression spring sleeved on the gear shaft. In this embodiment, the reset elastic member is a reset compression spring, but it is not sleeved on the gear shaft, and a plurality of reset compression springs are evenly and spaced along the circumferential direction of the gear shaft. In other embodiments, the reset elastic member can be a rubber cylinder sleeved on the gear shaft.

[0073] Embodiment 4 of the buoyancy adjustment system of the present invention:

[0074] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a bearing is provided at the left end of the valve core, and the left end of the valve core is rotationally assembled in the sliding shaft sleeve through the bearing. In this embodiment, no bearing is provided at the left end of the valve core, but a circular plate is provided, and polytetrafluoroethylene is provided on the outer peripheral surface of the circular plate to reduce the friction during rotation.

[0075] Embodiment 5 of the buoyancy adjustment system of the present invention:

[0076] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a buffer pad for buffering the left end of the valve core is provided on the right end surface of the gear shaft. In this embodiment, no buffer pad is provided on the right end surface of the gear shaft, and the distance between the right end surface of the gear shaft and the left end surface of the connecting sleeve is relatively far, that is, the connecting sleeve will not collide with the gear shaft.

[0077] Embodiment 6 of the buoyancy adjustment system of the present invention:

[0078] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the hinge axes of the two connecting rods and the corresponding shaft sleeves are parallel to each other and perpendicular to the axis of the gear shaft. In this embodiment, the hinge axes of the two connecting rods and the corresponding shaft sleeves are parallel to each other and have a certain angle with the axis of the gear shaft.

[0079] An embodiment of the pump valve assembly of the present invention, the structure of this pump valve assembly is the same as that of the pump valve assembly in any one of Embodiments 1 to 6 of the above buoyancy adjustment system, and will not be described in detail here.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the content of the specification and drawings of the present invention should, by the same token, be included within the protection scope of the present invention.

Claims

1. Pump valve assembly, characterized in that, The invention comprises a bidirectional hydraulic pump (14) and a stop valve (15). The bidirectional hydraulic pump (14) comprises a pump body (30) and a gear shaft (21) rotatably mounted in the pump body (30). The pump body (30) has a first pump port (16) and a second pump port (17) corresponding to a gear (36) on the gear shaft (21). With the axial direction of the gear shaft (21) as the left-right direction, the stop valve (15) comprises a valve body (31) fixed on the right side of the pump body (30) and a valve core (25) coaxially arranged with the gear shaft (21). The valve body (31) has a first valve port (18) and a second valve port (19). The second valve port (19) is connected to the first pump port (16) through a connecting pipe (24). The right end of the gear shaft (21) is connected to the first pump port (16). The sleeve is provided with a fixed shaft sleeve (22) and a sliding shaft sleeve which are arranged at intervals in the left-right direction. The left end of the valve core (25) is rotatably assembled in the sliding shaft sleeve so as to reciprocate in the left-right direction together with the sliding shaft sleeve. A reset elastic member (23) is provided between the fixed shaft sleeve (22) and the sliding shaft sleeve. The reset elastic member (23) is used to apply an elastic force to the sliding shaft sleeve to move rightward so as to close the stop valve (15) through the valve core (25). A centrifugal assembly is provided in the valve body (31). The centrifugal assembly includes two connecting rods (28) and a centrifugal weight ball (29). One end of the two connecting rods (28) is hinged to the fixed shaft sleeve (22) and the sliding shaft sleeve respectively, and the other end of the two connecting rods (28) is hinged to the centrifugal weight ball (29).

2. The pump valve assembly according to claim 1, characterized in that, A spline (38) is provided on the outer circumferential surface of the right end of the gear shaft (21), and a clamping groove (39) is provided on the left end of the spline (38); a spline groove (40) adapted to the spline (38) is provided on the inner walls of the fixed shaft sleeve (22) and the sliding shaft sleeve, and the fixed shaft sleeve (22) is fixed to the gear shaft (21) by a clamping spring (32) clamped in the clamping groove (39).

3. The pump valve assembly according to claim 1 or 2, characterized in that, The resetting elastic member (23) is a resetting compression spring sleeved on the gear shaft (21).

4. The pump valve assembly according to claim 1 or 2, characterized in that, The left end of the valve core (25) is provided with a bearing (26), and the left end of the valve core (25) is rotatably assembled in the sliding sleeve through the bearing (26).

5. The pump valve assembly according to claim 4, characterized in that, The bearing (26) is a deep groove ball bearing (26).

6. The pump valve assembly according to claim 1 or 2, characterized in that At least two groups of centrifugal components are arranged at intervals along the circumference of the gear shaft (21).

7. The pump valve assembly according to claim 1 or 2, characterized in that, A buffer pad (35) for buffering the left end of the valve core (25) is provided on the right end surface of the gear shaft (21).

8. The pump valve assembly according to claim 1 or 2, characterized in that, The hinge axes of the two connecting rods (28) and the corresponding shaft sleeves are parallel to each other and perpendicular to the axis of the gear shaft (21).

9. The pump valve assembly according to claim 1 or 2, characterized in that, The valve body (31) is provided with a hand hole (37).

10. Buoyancy adjustment system, comprising a drive motor (11), a water tank (12) and a pump valve assembly, characterized in that, The pump-valve assembly is the pump-valve assembly described in any one of claims 1 to 9, wherein the second pump port (17) of the pump-valve assembly is connected to the water tank (12) through a pipeline, and the drive motor (11) is transmission-connected to the gear shaft (21) of the bidirectional hydraulic pump (14) in the pump-valve assembly.

Images