阅读说明：本技术 水下阀门液压驱动器 (Hydraulic driver for underwater valve ) 是由 王正文 薄伟 吴帅 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种水下阀门液压驱动器,包括壳体以及分别设置在所述壳体两端的缸体和顶盖,所述壳体、缸体和顶盖之间形成腔体,所述腔体内设置有上支座,所述上支座将所述腔体分为第一腔体和第二腔体,所述第一腔体内设置有平衡器组件、操作杆、套设在所述操作杆上的阀杆螺母组件、以及套设在所述阀杆螺母组件上的轴承座,所述阀杆螺母组件包括活塞连接杆、位于所述活塞连接杆内的阀杆螺母以及用于将所述阀杆螺母固定在所述活塞连接杆上的压紧螺母。本发明的水下阀门液压驱动器结构设计合理,通过将阀杆螺母组件设置成多个部件组合的方式,可以降低驱动器的操作扭矩,减少磨损,延长相关部件的使用寿命,降低成本。(The invention discloses an underwater valve hydraulic driver which comprises a shell, a cylinder body and a top cover, wherein the cylinder body and the top cover are respectively arranged at two ends of the shell, a cavity is formed among the shell, the cylinder body and the top cover, an upper support is arranged in the cavity, the cavity is divided into a first cavity and a second cavity by the upper support, a balancer assembly, an operating rod, a valve rod nut assembly and a bearing seat are arranged in the first cavity, the valve rod nut assembly is sleeved on the operating rod, the bearing seat is sleeved on the valve rod nut assembly, and the valve rod nut assembly comprises a piston connecting rod, a valve rod nut and a compression nut, the valve rod nut is located in the piston connecting rod, and the compression nut. The underwater valve hydraulic driver has reasonable structural design, and the valve rod nut assembly is arranged in a mode of combining a plurality of components, so that the operating torque of the driver can be reduced, the abrasion is reduced, the service life of related components is prolonged, and the cost is reduced.)

1. the utility model provides an underwater valve hydraulic driver, includes the casing and sets up respectively the cylinder body and the top cap at casing both ends, form cavity, its characterized in that between casing, cylinder body and the top cap: be provided with the upper bracket in the cavity, the upper bracket will the cavity divide into first cavity and second cavity, be provided with balancer subassembly, action bars, cover in the first cavity and establish valve-stem nut subassembly and cover on the action bars are established bearing frame on the valve-stem nut subassembly, the bearing frame is fixed on the top cap, the valve-stem nut subassembly includes the piston connecting rod, is located valve-stem nut in the piston connecting rod and be used for with valve-stem nut fixes gland nut on the piston connecting rod is provided with in the valve-stem nut with external screw thread matched with internal thread on the action bars.

2. A subsea valve hydraulic actuator as recited in claim 1, further comprising: the periphery of the valve rod nut is further provided with a locking groove extending along the axial direction of the valve rod nut, and a locking pin used for fixing the valve rod nut relative to the piston connecting rod is arranged in the locking groove.

3. A subsea valve hydraulic actuator as recited in claim 2, further comprising: one side of the bearing seat close to the piston connecting rod is provided with a convex tooth, and the periphery of the piston connecting rod is provided with a tooth groove matched with the convex tooth.

4. A subsea valve hydraulic actuator as recited in claim 1, further comprising: a bearing is arranged between the top end of the operating rod and the top cover, and a guide belt and a rolling bearing are arranged between the operating rod and the bearing seat.

5. A subsea valve hydraulic actuator as recited in claim 1, further comprising: the balancer assembly comprises a balancer housing located in the first cavity and a balancer connector connected to the top cover, the balancer connector is arranged on the top cover in a penetrating mode, at least one through hole is formed in the bottom of the balancer housing, and the through hole is communicated with the cavity.

6. A subsea valve hydraulic actuator as in claim 5, wherein: the balancer connector is connected with a water passing cap assembly, the water passing cap assembly comprises a connector nut, a butt joint, a connector welding piece and a water passing cap, and the connector nut is connected with the top end of the balancer connector.

7. A subsea valve hydraulic actuator as in claim 5, wherein: the balancer housing is at least partially annular, and surrounds the bearing housing, lever and stem nut assembly.

8. A subsea valve hydraulic actuator as recited in claim 1, further comprising: the top cover is provided with an interface mechanism used for being matched with the underwater robot, and the interface mechanism comprises an override shaft connected to the top end of the operating rod, an interface used for being connected with the underwater robot, a sealing ring and a guide belt, wherein the sealing ring and the guide belt are positioned between the override shaft and the top cover.

9. a subsea valve hydraulic actuator as recited in claim 1, further comprising: the piston is characterized in that an elastic piece and a piston rod are arranged in the second cavity, one end of the elastic piece acts on the cylinder body, the other end of the elastic piece acts on the upper support, the top end of the piston rod is connected onto the upper support through a connecting nut, the bottom end of the piston connecting rod acts on the top end of the piston rod or the top end of the connecting nut, and the bottom end of the piston connecting rod is not connected with the top end of the piston rod or the top end of the connecting nut.

10. A subsea valve hydraulic actuator as claimed in any of claims 1-9, characterized in that: still be provided with switch indicating mechanism in the first cavity, switch indicating mechanism's lower extreme with the upper bracket is connected, switch indicating mechanism's upper end runs through the top cap.

Technical Field

The invention relates to the technical field of valves, in particular to a spring reset type underwater valve hydraulic driver.

Background

In the equipment for exploiting and producing oil and gas and oil in the sea, an underwater valve and a valve actuating mechanism device are usually used, the actuating mechanism drives the underwater valve to open the valve, and the underwater valve and the actuating mechanism thereof all need long-period maintenance-free use work requirements, so that the high-reliability underwater valve and an actuating machine thereof form the design key of the underwater valve device.

Disclosure of Invention

in view of the above, in order to overcome the defects of the prior art, the present invention provides a hydraulic actuator for an underwater valve, which solves the problems that the structural design of the existing actuator is not reasonable and the valve stem nut is easy to wear.

In order to achieve the purpose, the invention adopts the following technical scheme:

The utility model provides an underwater valve hydraulic driver, includes the casing and sets up respectively the cylinder body and the top cap at casing both ends, form the cavity between casing, cylinder body and the top cap, be provided with the upper bracket in the cavity, the upper bracket will the cavity divide into first cavity and second cavity, be provided with balancer subassembly, action bars, cover in the first cavity and establish valve-stem nut subassembly and cover on the action bars are established bearing frame on the valve-stem nut subassembly, the bearing frame is fixed on the top cap, the valve-stem nut subassembly includes the connecting rod, is located valve-stem nut in the connecting rod and be used for with valve-stem nut fixes gland nut on the connecting rod is provided with in the valve-stem nut with external screw thread matched with internal thread on the action bars. Firstly, the balancer assembly is arranged in the cavity, so that the space in the cavity is utilized to the maximum, and the internal structure is designed more reasonably; secondly, through the mode that sets up the valve stem nut subassembly into a plurality of parts combination, can reduce the operating torque of driver, reduce wearing and tearing, prolong the life of relevant part, reduce cost.

Preferably, still set up along its axial extension's locking groove in valve stem nut's the periphery, locking inslot be provided with be used for with valve stem nut is relative the fixed stop pin of piston connecting rod, locking groove and stop pin evenly distributed in valve stem nut's periphery. The piston connecting rod corresponds the locking groove and has also seted up corresponding groove, through mutually supporting of two grooves and stop pin, fixes the relative position between valve-stem nut and the piston connecting rod, prevents to drive valve-stem nut when the action bars pivoted and rotates.

More preferably, the bearing frame is close to one side of piston connecting rod is provided with the dogtooth, be provided with on the periphery of piston connecting rod with dogtooth matched with tooth's socket, tooth's socket and dogtooth cooperate each other and slide. The operating rod is connected with the valve rod nut component through the trapezoidal threads, and the valve rod nut component is positioned with the bearing seat through the spline, so that the rotating force applied to the operating rod can be converted into the lifting force.

Preferably, a bearing is arranged between the top end of the operating rod and the top cover, and a guide belt and a rolling bearing are arranged between the operating rod and the bearing seat. A bearing is added between the operating rod and the top cover, so that friction generated during operation between the operating rod and the top cover can be avoided; use antifriction bearing as main bearing between action bars and the bearing frame, the operating torque when can effectively reduce rotatory operation, also add the guidance tape simultaneously between action bars and the bearing frame, avoid wearing and tearing.

Preferably, the balancer assembly includes a balancer housing located in the first cavity and a balancer connector connected to the top cover, the balancer connector is disposed on the top cover in a penetrating manner, at least one through hole is formed in the bottom of the balancer housing, and the through hole and the cavity are mutually communicated. In actual operation of the actuator, the volume of hydraulic oil inside the actuator housing fluctuates due to the up-and-down movement of the piston rod and the like, and such volume changes are compensated for by the up-and-down floating of the liquid level in the balancer housing.

More preferably, a water passing cap assembly is connected to the balancer connector, the water passing cap assembly includes a connector nut, a butt connector, a connector welding member and a water passing cap, which are connected in sequence, and the connector nut is connected to the top end of the balancer connector. The balancer assembly needs to be communicated with seawater through the water cap assembly, and the blockage of the channel by marine organisms can be effectively avoided.

more preferably, the balancer housing is at least partially annular, and the balancer housing surrounds the bearing housing, the operating rod, and the stem nut assembly. That is, the bearing housing, lever and stem nut assembly are enclosed within an annular balancer housing so that the balancer assembly can be reasonably located within the cavity.

Preferably, an interface mechanism used for being matched with the underwater robot is arranged on the top cover, and the interface mechanism comprises an override shaft connected to the top end of the operating rod, an interface used for being connected with the underwater robot, a sealing ring and a guide belt, wherein the sealing ring and the guide belt are positioned between the override shaft and the top cover. When an ROV (remote operated unmanned vehicle) is used for driving, an ROV tool is inserted into an ROV interface, the override shaft and the operating rod can be rotationally operated to carry out rotary motion, two sealing rings and a guide belt are added between the override shaft and the top cover, on one hand, the sealing between the override shaft and the top cover can be ensured, and on the other hand, the abrasion between the override shaft and the top cover can be avoided.

Preferably, an elastic part and a piston rod are arranged in the second cavity, one end of the elastic part acts on the cylinder body, the other end of the elastic part acts on the upper support, the top end of the piston rod is connected onto the upper support through a connecting nut, the bottom end of the piston connecting rod acts on the top end of the piston rod or the top end of the connecting nut, and the bottom end of the piston connecting rod is not connected with the top end of the piston rod or the top end of the connecting nut. The lifting motion of the valve rod nut component can push the piston rod and the connecting nut to move, so that the valve rod and the flashboard are pushed to do lifting motion; and the bottom end of the piston connecting rod is only contacted with but not connected with the top end of the piston rod or the top end of the connecting nut, so that the assembly is convenient to mount, dismount and replace.

Preferably, a switch indicating mechanism is further arranged in the first cavity, the lower end of the switch indicating mechanism is connected with the upper support, and the upper end of the switch indicating mechanism penetrates through the top cover. The switch indicating mechanism comprises a position indicator and an indicating needle, the upper support moves up and down to drive the position indicator and the indicating needle to move correspondingly, and the valve can be judged to be in an opening position or a closing position through the direction of the indicating needle.

Due to the adoption of the technical scheme, compared with the prior art, the hydraulic driver of the underwater valve has reasonable structural design, firstly, the balancer assembly is arranged in the cavity, so that the space utilization in the cavity is maximized, and the internal structural design is more reasonable; secondly, through the mode that sets up the valve stem nut subassembly into a plurality of parts combination, can reduce the operating torque of driver, reduce wearing and tearing, prolong the life of relevant part, reduce cost.

Drawings

in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a subsea valve hydraulic actuator in accordance with a preferred embodiment of the present invention;

FIG. 2 is a top view of the subsea valve hydraulic actuator of the preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of a stem nut assembly of a preferred embodiment of the present invention;

FIG. 4 is a top view of a stem nut assembly according to a preferred embodiment of the present invention;

FIG. 5 is a perspective view of a valve stem nut of the preferred embodiment of the present invention;

FIG. 6 is a perspective view of a balancer according to a preferred embodiment of the present invention from a first perspective;

FIG. 7 is a perspective view of a balancer according to a preferred embodiment of the present invention from a second perspective;

FIG. 8 is a cross-sectional view of a water cap assembly in accordance with a preferred embodiment of the present invention;

In the drawings: 1. the hydraulic control valve comprises a plug, a 2-close indication piece, a 3-indication needle, a 4-open indication piece, a 5-cylinder body, a 6-O-shaped ring, a 7-shell, a 8-spring, a 9-sealing ring, a 10-balancer assembly, a 11-rolling bearing, a 12-screw, a 13-operating rod, a 14-top cover, a 15-water cap assembly, a 16-nut, a 17-gasket, a 18-bearing, a 19-guide belt, a 20-ROV interface, a 21-override shaft, a 22-position indicator, a 23-bearing seat, a 24-valve rod nut assembly, a 25-connecting nut, a 26-upper support, a 27-piston, a 28-piston rod, a 2401-piston connecting rod, a 2402-valve rod nut, a 2403-locking pin, a 2404-pressing nut, 2405-tooth groove, 2406-internal thread, 2407-locking groove, 2408-mounting hole, 1501-joint nut, 1502-water-passing cap, 1504-joint, a welding piece, 1001-, 1002. Balancer housing 1003, through hole 1003.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the underwater valve hydraulic driver of the embodiment includes a housing 7, and a cylinder body 5 and a top cover 14 respectively disposed at two ends of the housing 7, wherein O-rings 6 are disposed at joints among the housing 7, the cylinder body 5, and the top cover 14, a cavity is formed among the housing 7, the cylinder body 5, and the top cover 14, an upper support 26 is disposed in the cavity, and the cavity is divided into a first cavity and a second cavity by the upper support 26.

the balancer assembly 10, the operating rod 13, the valve rod nut assembly 24 sleeved on the operating rod 13 and the bearing seat 23 sleeved on the valve rod nut assembly 24 are arranged in the first cavity, the bearing seat 23 is fixed on the top cover 14 through a screw 12, the valve rod nut assembly 24 comprises a piston connecting rod 2401, a valve rod nut 2402 arranged in the piston connecting rod 2401 and a gland nut 2404 used for fixing the valve rod nut 2402 on the piston connecting rod 2401, a mounting hole 2408 is further formed in the gland nut 2404, an internal thread 2406 matched with the external thread on the operating rod 13 is arranged in the valve rod nut 2402, convex teeth are arranged on one side, close to the piston connecting rod 2401, of the bearing seat 23, a tooth groove 2405 matched with the convex teeth is arranged on the periphery of the piston connecting rod 2401, and the tooth groove 2405 and. The internal thread 2406 and the external thread are matched with each other, so that the operating rod 13 converts circumferential force into axial force when rotating, and the valve rod nut assembly 24 is pushed to move up and down.

As shown in fig. 3 to 5, in order to fix the relative position between the stem nut 2402 and the piston connecting rod 2401 and prevent the stem nut 2402 from being rotated when the operating rod 13 is rotated, in this embodiment, a locking groove 2407 extending along the axial direction of the stem nut 2402 is further formed in the outer periphery of the stem nut 2402, a locking pin 2403 for fixing the stem nut 2402 relative to the piston connecting rod 2401 is disposed in the locking groove 2407, and the locking groove 2407 and the locking pin 2403 are uniformly distributed in the outer periphery of the stem nut 2402. The piston connecting rod 2401 is also provided with a corresponding groove corresponding to the locking groove 2407.

As shown in fig. 6 to 7, the balancer assembly 10 includes a balancer housing 10027 located in the first cavity and a balancer connector 1001 connected to the top cover 14, the balancer connector 1001 is penetratingly disposed on the top cover 14, at least one through hole 1003 is formed at the bottom of the balancer housing 10027, and the through hole 1003 is mutually communicated with the cavity. The balancer connector 1001 is connected to a water cap assembly 15, the water cap assembly 15 includes a connector nut 1501, a butt connector 1503, a connector weld 1504, and a water cap 1502, which are connected in this order, and the connector nut 1501 is connected to the top end of the balancer connector 1001.

The balancer housing 10027 has an at least partially annular shape, and the balancer housing 10027 surrounds the bearing housing 23, the operating lever 13, and the stem nut assembly 24. That is, the bearing housing 23, the operating rod 13 and the stem nut assembly 24 are enclosed within the annular balancer housing 10027 so that the balancer assembly 10 can be properly positioned within the chamber.

As shown in fig. 1, an elastic member, namely, a spring 8 and a piston rod 28, is disposed in the second cavity, one end of the elastic member acts on the cylinder 5, the other end of the elastic member acts on the upper support 26, the top end of the piston rod 28 is connected to the upper support 26 through a connecting nut 25, the bottom end of the piston connecting rod 2401 acts on the top end of the piston rod 28 or the top end of the connecting nut 25, and the bottom end of the piston connecting rod 2401 is not connected to the top end of the piston rod 28 or the top end of the connecting nut 25. The bottom end of the piston connecting rod 2401 is in contact with but not connected to the top end of the piston rod 28 or the top end of the connecting nut 25, facilitating the assembly and disassembly for replacement.

As shown in fig. 1, a switch indication mechanism is further disposed in the first cavity, the switch indication mechanism includes a position indicator 22 and an indication needle 3, a lower end of the switch indication mechanism is connected with an upper support 26, an upper end of the switch indication mechanism penetrates through the top cover 14, a related indication 2 and a related indication 4 are disposed on the top cover 14, and opening of the valve is judged by looking at a direction of the indication needle 3. A bearing is provided between the top end of the operating rod 13 and the top cover 14, and a guide band 19 and a rolling bearing 11 are provided between the operating rod 13 and a bearing housing 23.

The top cover 14 is provided with an interface mechanism for matching with the underwater robot, and the interface mechanism comprises an override shaft 21 connected to the top end of the operating rod 13, an ROV interface 20 for connecting with the underwater robot, a sealing ring 9 positioned between the override shaft 21 and the top cover 14 and a guide belt 19.

The working process of the hydraulic driver of the underwater valve of the embodiment is briefly described as follows:

The underwater valve hydraulic driver of the present embodiment has two driving modes, the first is hydraulic driving, and the second is ROV (remote operated unmanned vehicle, i.e. underwater robot) driving. When in use, the first driving mode is mainly used. During actual work, hydraulic oil with specific driving pressure and specific purity is injected into a closed space formed by the cylinder body 5, the piston 27 and the piston rod 28, the piston rod 28 of the driver is operated to move up and down, and therefore force is applied to the valve rod and the flashboard of the valve, and the valve is opened and closed. The movement of the actuator piston 27, 28 will transmit a force to the upper abutment 26 and the spring 8 via the piston rod 28, the coupling nut 25, so that the upper abutment 26 moves with the piston 27, 28 accordingly. Meanwhile, the up-and-down movement of the upper support 26 will drive the position indicator 22 and the indicating needle 3 to move correspondingly, and the direction of the indicating needle 3 can be used to determine whether the valve is in the open position or the closed position. If the hydraulic drive fails in the midway, the driver can return the valve to an opening or closing state under the action of the resilience force of the spring 8. Meanwhile, under the condition of hydraulic failure, the ROV driving which is the second driving mode can be selected to operate the driver, so that the valve is controlled.

the top cover 14 of the drive of the embodiment is provided with an ROV interface 20, when an ROV (remote operated unmanned vehicle) is used for driving, an ROV tool is inserted into the ROV interface 20, the override shaft 21 and the operating rod 13 can be operated in a rotating mode to rotate, two sealing rings 9 and one guide belt 19 are added between the override shaft 21 and the top cover 14, on one hand, sealing between the override shaft 21 and the top cover 14 can be guaranteed, and on the other hand, abrasion between the override shaft 21 and the top cover 14 can be avoided; a bearing 18 is added between the operating rod 13 and the top cover 14, so that friction generated during operation between the operating rod and the top cover can be avoided; the rolling bearing 11 is used as a main bearing between the operating rod 13 and the bearing seat 23, so that the operating torque during the rotating operation can be effectively reduced, and meanwhile, the guide belt 19 is also added between the operating rod 13 and the bearing seat 23, so that the abrasion is avoided. The operating rod 13 is connected to the stem nut assembly 24 by trapezoidal threads and the stem nut assembly 24 is splined to the bearing block 23, thereby converting rotational force applied to the override shaft 21 into lifting force. The lifting movement of the valve stem nut assembly 24 can push the piston rod 28 and the connecting nut 25 to move, thereby pushing the valve stem and the gate plate to move up and down.

The conventional valve rod nut is mainly integrally processed by high-strength copper alloy, and the cost is high. The present actuator stem nut assembly 24 is a modular construction as shown in fig. 3-5. The combined structure can exert the advantages of different assembly materials to the maximum extent. First, the main component of the stem nut assembly 24 is the stem nut 2402, and the stem nut 2402 is made of high-strength copper alloy, so that the operating torque of the driver can be reduced by virtue of the self-lubricating property of the copper alloy. The valve rod nut 2402 and the piston connecting rod 2401 are positioned through four locking pins 2403, so that relative rotation between the valve rod nut 2402 and the piston connecting rod 2401 during rotation is prevented, and slight relative rotation can be prevented by arranging certain matching. In addition, the gland nut 2404 is also provided to prevent the stem nut 2402 from disengaging from the piston connecting rod 2401.

The drive of this embodiment uses a built-in open balancer assembly 10, see in particular fig. 6-7. When the device is used, the inside of the driver and the inside of the balancer need to be filled with non-water machine hydraulic oil by opening the plugs 1, and the selected hydraulic oil density must be larger than that of seawater. The balancer assembly 10 and the driver top cover 14 are fixed by two methods, i.e., fixed by bolts through bolt connecting holes on the balancer housing 1002; second, the nut 16 is fixed to the balancer fitting 1001. In actual operation of the actuator, fluctuations in the volume of hydraulic oil within the actuator housing 7 due to the up and down movement of the piston or the like are compensated for by the up and down floating of the liquid level in the balancer assembly 10. The present drive with the balancer elements disposed inside maximizes space utilization.

In addition, the balancer assembly 10 needs to communicate with the seawater through the water cap assembly 15 to effectively prevent the marine organisms from blocking the passage. The water cap assembly 15 is shown in detail in fig. 8. The union nut 1501 of the water passing cap assembly 15 is movably provided to facilitate adjustment of the direction of the water passing cap after installation, and the union nut 1501 and the balancer assembly 10 are sealed by a gasket 17. The water cap 1502 is usually made of copper, and marine organisms can be effectively prevented from attaching due to the killing effect of copper ions. Meanwhile, the existence of potential difference between the copper material and other alloy materials is fully considered, and the water passing cap 1502 and the joint welding piece 1504 are connected through a non-metal joint, so that the potential corrosion is avoided.

The underwater valve hydraulic driver is reasonable in structural design, firstly, the balancer assembly is arranged in the cavity, so that the space utilization in the cavity is maximized, and the internal structural design is more reasonable; secondly, through the mode that sets up the valve stem nut subassembly into a plurality of parts combination, can reduce the operating torque of driver, reduce wearing and tearing, prolong the life of relevant part, reduce cost.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.