Thread-driven large-diameter electric wedge type double-gate-disc gate valve

Abstract

The invention belongs to the technical field of ship maintenance auxiliary equipment, and particularly relates to a large-diameter electric wedge-type double-gate-disc gate valve adopting thread transmission. Comprising a valve seat, a valve plate, a base, a transmission mechanism and a driving mechanism, the valve seat is arranged under the water surface, the valve plate and the valve seat are arranged in a matched mode, the base is arranged above the valve seat, a lifting hole penetrating up and down is formed in the base, the transmission mechanism comprises a rotating cavity, a nut and a coupler, the rotating cavity is formed in the top of the base, and the nut is arranged in the rotating cavity. The nut is located in the rotating cavity, the top of the valve plate is connected with a lead screw, the lead screw penetrates through the lifting hole to be in threaded connection with the nut, and the driving mechanism drives the nut to rotate. The coupler rotates to drive the nut to rotate, so that the flashboard is opened and closed, the nut and the lead screw are connected above the water surface, and the lead screw and the nut are not in contact with sundries in a sea area and are prevented from being directly soaked in seawater. The lifting cavity and the rotating cavity play a protection role, and external force impact and collision are avoided. And normal operation of up-down opening and closing is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of ship maintenance auxiliary equipment, and in particular to a large-diameter electric wedge double gate valve with threaded drive. Background Technology

[0002] The electric concealed stem wedge double gate valve is an important piece of equipment in the dock flooding system. It is controlled by the system pipeline. When the valve opens, seawater from the sea area is put into the dock, allowing the ship to float in the dock, thus realizing the operation of the ship entering and leaving the dock.

[0003] The electric non-slip wedge gate valve mainly consists of a valve body, valve cover, valve plates (left and right valve plates), centering ball, lead screw, lead nut, transmission support, electrical control device, and handwheel. The electrical control device or handwheel rotates, driving the lead screw coupling to rotate. The lead screw then screws into the lead nut inside the valve plate, causing the valve plate to move linearly perpendicular to the fluid direction, thus controlling its opening and closing.

[0004] During the disassembly and inspection of the gate valve's internal valve plate, significant wear was found. Because the lead screw and nut within the valve body are difficult to maintain and are susceptible to corrosion due to seawater immersion, this increases friction during operation and significantly reduces the equipment's lifespan. Since the gate valve is connected to the sea, debris can sometimes become entangled in the mandrel and nut, causing the gate valve to jam and fail to open or close properly. Summary of the Invention

[0005] This invention provides a large-diameter electric wedge double gate valve with threaded drive, which can simplify the components in seawater and avoid seawater corrosion affecting the normal operation of the gate valve.

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions: A large-diameter electric wedge double gate valve with threaded drive includes a valve seat, a valve plate, a base, a transmission mechanism, and a drive mechanism. The valve seat is located below the water surface, and the valve plate is matched with the valve seat. The base is located above the valve seat and has a lifting hole that extends through the top and bottom. The transmission mechanism includes a rotating cavity, a screw nut, and a coupling. The rotating cavity is located at the top of the base, and the screw nut is located inside the rotating cavity. A screw rod is connected to the top of the valve plate, and the screw rod passes through the lifting hole and is screwed to the screw nut. The drive mechanism drives the screw nut to rotate.

[0007] The aforementioned threaded drive large-diameter electric wedge double gate valve has a drive mechanism comprising a worm gear assembly, a drive motor, and a coupling. The worm gear of the worm gear assembly is connected to the nut via the coupling, and the drive motor drives the worm of the worm gear assembly to rotate.

[0008] In the aforementioned threaded drive large-diameter electric wedge double gate valve, a speed reducer is provided between the drive motor and the worm gear.

[0009] The above-mentioned large-diameter electric wedge double gate valve with threaded drive has a lifting chamber above the screw nut, the top of the screw moves up and down in the lifting chamber, a baffle is provided on the top of the screw, the coupling is a three-jaw type, the coupling is sleeved outside the lifting chamber, a sleeve is connected to the coupling, and the worm gear is sleeved and fixed to the sleeve.

[0010] The above-mentioned large-diameter electric wedge double gate valve with threaded drive has a bearing between the nut and the rotating cavity, and rollers on the side of the valve plate.

[0011] Compared with existing technologies, this invention uses a motor to drive the coupling to rotate, which in turn drives the lead screw nut to rotate, thereby achieving the opening and closing of the gate. By placing the connection between the lead screw nut and the lead screw above the water surface, the lead screw and nut are prevented from contacting marine debris and directly from being submerged in seawater. The lifting and rotating chambers provide protection against external impacts and collisions, ensuring the normal operation of the gate's opening and closing mechanism. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; The markings in the attached diagram represent: 1. Valve seat, 2. Valve plate, 3. Base, 4. Rotating cavity, 5. Threaded nut, 6. Coupling, 7. Roller, 8. Worm gear, 9. Worm, 10. Drive motor, 11. Coupling, 12. Lifting cavity, 13. Baffle, 14. Sleeve, 15. Lead screw, 16. Reducer. Detailed Implementation

[0013] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention.

[0014] like Figure 1 The present invention includes a valve seat 1, a valve plate 2, a base 3, a transmission mechanism and a drive mechanism. The valve seat 1 is located below the water surface, the valve plate 2 is matched with the valve seat 1, and the base 3 is located above the valve seat 1. The base 3 is provided with a lifting hole that runs through the top and bottom to protect the lead screw 15 from external impacts and collisions.

[0015] The transmission mechanism includes a rotating cavity 4, a lead screw nut 5, and a coupling 116. The rotating cavity 4 is located on the top of the base 3, and the lead screw nut 5 is located inside the rotating cavity 4. A lead screw 15 is connected to the top of the valve plate 2, and the lead screw 15 passes through the lifting hole and is screwed to the lead screw nut 5. The drive mechanism drives the lead screw nut 5 to rotate. To make the rotation of the lead screw nut 5 smoother, a bearing is provided between the lead screw nut 5 and the rotating cavity 4. Rollers 7 are provided on the side of the valve plate 2, which can turn the collision between the valve plate 2 and the valve seat 1 during the lifting process into rolling, reducing wear.

[0016] For ease of operation from the control room, the drive mechanism includes a worm gear 8 and a worm 9 assembly, a drive motor 10, and a coupling 116. The worm gear 8 of the worm gear 8 and worm 9 assembly is connected to the nut 5 via the coupling 116, and the drive motor 10 drives the worm 9 of the worm gear 8 and worm 9 assembly to rotate. Preferably, a speed reducer 16 is provided between the drive motor 10 and the worm 9.

[0017] A lifting cavity 12 is provided above the lead screw nut 5. The top of the lead screw 15 moves up and down within the lifting cavity 12. A baffle 13 is provided on the top of the lead screw 15. The coupling 116 is a three-jaw type and is sleeved outside the lifting cavity 12. A sleeve 14 is connected to the coupling 116. The worm gear 8 is fitted and fixedly connected to the sleeve 14. This ensures the stability of operation.

[0018] In this way, the motor can drive the entire valve to complete the normal operation of opening and closing.

[0019] The most vulnerable component in this valve is the threaded nut 5. Previously, replacement or repair required complete disassembly because this valve is connected to the sea, posing a significant safety hazard during maintenance. Now, replacing the threaded nut 5 only requires removing the electric actuator, eliminating the need for complete disassembly and greatly reducing the safety hazard of seawater backflow. This improves the equipment's availability, reduces the frequency of maintenance and safety hazards during repairs, and significantly reduces the economic cost of maintenance and replacement. A new type of threaded drive system allows the threaded rod 15 and threaded nut 5 to avoid contact with marine debris and prevent wear on the valve plate 2. This system enables the gate valve to open and close. Currently, the equipment has a 100% failure rate and zero repair frequency, significantly reducing manpower investment in maintenance. The most vulnerable component in this valve is the threaded nut 5. Previously, replacement or repair required complete disassembly because this valve is connected to the sea, posing a significant safety hazard during maintenance. Now, replacing the threaded nut 5 only requires removing the drive mechanism, eliminating the need for complete disassembly and greatly reducing the safety hazard of seawater backflow.

[0020] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A large-diameter electrically driven wedge double gate valve with threaded drive, characterized in that, The system includes a valve seat (1), a valve plate (2), a base (3), a transmission mechanism, and a drive mechanism. The valve seat (1) is located below the water surface. The valve plate (2) is matched with the valve seat (1). The base (3) is located above the valve seat (1) and has a lifting hole that runs through the top and bottom. The transmission mechanism includes a rotating cavity (4), a screw nut (5), and a coupling (6). The rotating cavity (4) is located on the top of the base (3). The screw nut (5) is located inside the rotating cavity (4). A screw rod (15) is connected to the top of the valve plate (2). The screw rod (15) passes through the lifting hole and is screwed to the screw nut (5). The drive mechanism drives the screw nut (5) to rotate.

2. The large-diameter electric wedge double gate valve with threaded drive as described in claim 1, characterized in that, The drive mechanism includes a worm gear (8) and worm (9) assembly, a drive motor (10) and a coupling (6). The worm gear (8) of the worm gear (8) and worm (9) assembly is connected to the nut (5) through the coupling (6). The drive motor (10) drives the worm (9) of the worm gear (8) and worm (9) assembly to rotate.

3. The large-diameter electric wedge double gate valve with threaded drive as described in claim 2, characterized in that, A speed reducer (11) is provided between the drive motor (10) and the worm (9).

4. The large-diameter electric wedge double gate valve with threaded drive as described in claim 3, characterized in that, The lead screw (5) is provided with a lifting cavity (12) above it. The top of the lead screw (15) moves up and down in the lifting cavity (12). The top of the lead screw (15) is provided with a baffle (13). The coupling (6) is a three-jaw type. The coupling (6) is sleeved outside the lifting cavity (12). The sleeve (14) is connected to the coupling (6). The worm gear (8) is sleeved and fixed to the sleeve (14).

5. The threaded-drive large-diameter electric wedge double gate valve as described in claim 4, characterized in that, A bearing is provided between the nut (5) and the rotating cavity (4).

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