Underwater hydraulic hoist

Abstract

The application provides an underwater hydraulic hoist, which comprises a hydraulic cylinder, a piston rod and a power assembly, the piston rod extends out of the hydraulic cylinder to form an outer acting part, further comprises a flexible protection assembly and a filter assembly, the flexible protection assembly, the hydraulic cylinder and the outer acting part are sealingly connected to form a flexible bin, and the flexible bin is in communication with the filter assembly. The filter assembly comprises a filter, the filtering-out end of the filter is sealingly connected with the flexible bin, and a check valve is arranged at the filtering-in end. A breathing pipe is arranged in a cable assembly. The underwater hydraulic hoist provided by the application can ensure that the outer acting part of the piston rod is separated from the external dirty water body through the flexible protection assembly and the filter assembly, and prevent the piston rod from being damaged or leaking due to scaling and the like. The application has the advantages of simple structure, reliable operation, convenient installation and the like.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and more specifically, to an underwater hydraulic gate hoist. Background Technology

[0002] Hydraulic gate hoists are widely used in water conservancy projects. However, when the piston rod of a hydraulic gate hoist is used in water, it is easy for deposits to form on its surface, which can damage the cylinder seals and make it difficult to guarantee the lifespan of the hydraulic gate hoist in water. When the hydraulic gate hoist is installed underwater, there are also problems such as the sealing of the power system and the negative pressure caused by changes in the internal volume of the cylinder, which make the hydraulic gate hoist perform poorly underwater. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the purpose of this invention is to provide an underwater hydraulic gate hoist that can operate underwater. It uses a flexible protective sleeve to isolate the piston rod from external impurities in the water, thereby reducing damage to the piston rod during long-term operation, and is equipped with a pressure balancing component.

[0004] The underwater hydraulic gate opener provided by the present invention includes a hydraulic cylinder, a piston rod, and a power assembly. The portion of the piston rod extending out of the hydraulic cylinder forms an external working part. The system also includes a flexible protection assembly. The flexible protection assembly, the hydraulic cylinder, and the external working part form a flexible chamber. The flexible chamber protects the external working part of the piston rod from direct contact with the water outside the chamber.

[0005] Preferably, the hydraulic cylinder includes an end cap and a cylinder body, with one end of the flexible protection component sealed to the end cap or cylinder body and the other end sealed to the tail end of the piston rod's external action part.

[0006] Preferably, the flexible protection component includes a flexible protective sleeve, which extends or retracts when the piston rod extends or retracts from the hydraulic cylinder.

[0007] Preferably, a guide assembly is formed at the connection position between the hydraulic cylinder and the piston rod, and two sets of sealing grooves are opened in the guide assembly, with sealing rings provided in the sealing grooves.

[0008] Preferably, it further includes a filter assembly, which includes a filter having an inlet end and an outlet end, the outlet end of which is in communication with the flexible chamber.

[0009] Preferably, the flexible chamber contains a fluid medium or water, and the volume of the flexible chamber can vary by allowing fluid to be discharged or drawn in via a filtration assembly.

[0010] Preferably, when the piston rod extends or retracts from the hydraulic cylinder, it causes the volume of the flexible chamber to increase or decrease.

[0011] Preferably, the filter inlet includes two inlet and outlet ports, each equipped with a check valve with opposite operating directions.

[0012] Preferably, the filtration assembly includes a primary filter and a secondary filter. The primary filter has a filter screen inside and inlet / outlet ports. The secondary filter has a diaphragm inside, with one end connected to the primary filter and the other end connected to the flexible chamber.

[0013] Preferably, it also includes a cable assembly, and the power assembly includes a sealed chamber that is connected to the surface above the water via the cable assembly.

[0014] Preferably, it also includes a breathing tube, one end of which is connected to the air above the water surface, and the other end is connected to the power assembly.

[0015] Preferably, it also includes a cable assembly, which further includes a cable and a protective layer. The breathing tube and the cable are built into the protective layer. One end of the breathing tube is connected to the air above the water surface, and the other end of the breathing tube is connected to the fuel tank of the power unit.

[0016] Based on the above description of the technical solution, the present invention has the following beneficial effects:

[0017] 1. The underwater hydraulic gate opener provided by this invention, by setting a flexible protective component outside the hydraulic cylinder and piston rod, forms a flexible chamber through the sealed connection between the flexible protective component and the piston rod and hydraulic cylinder, and the flexible chamber is connected to a filter. This allows the liquid inside the flexible chamber to be isolated from the external water, thereby preventing scale buildup on the piston rod and damage to the sealing structure between the piston rod and the hydraulic cylinder, extending the service life of the equipment.

[0018] 2. The underwater hydraulic gate hoist provided by the present invention has a check valve at the filter inlet end. When the piston rod is in a non-working state, it can prevent the filter from exchanging with the external water, thereby reducing the unnecessary working time of the filter. The primary and secondary filters perform the functions of coarse filtration and fine filtration, improving the service life of the filter and the gate hoist.

[0019] 3. The underwater hydraulic gate hoist provided by this invention includes a snorkel connecting the oil tank to the outside environment in its cable assembly. The snorkel ensures air pressure balance of the power components during operation, and its design is simple and reliable. Furthermore, the snorkel being integrated into the cable makes it easy to install and provides protection.

[0020] 4. The underwater hydraulic gate hoist provided by the present invention has a guide component designed with a two-way sealing structure, which can withstand the pressure of the water inside the cylinder and the external water body respectively, thereby improving the sealing reliability and service life of the device. Attached Figure Description

[0021] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the underwater hydraulic gate opening and closing mechanism of the present invention.

[0023] Figure 2 This is a front view of the underwater hydraulic gate opener of the present invention.

[0024] Figure 3 yes Figure 2 Cross-sectional view of a submersible hydraulic gate hoist (DD).

[0025] Figure 4 This is a schematic diagram of the underwater hydraulic gate opening and closing machine filter assembly of the present invention.

[0026] Figure 5 This is a partial structural diagram of the connection between the flexible protective sleeve and the filter of the underwater hydraulic gate opener of the present invention.

[0027] Figure 6 This is a cross-sectional view of the underwater hydraulic gate hoist cable assembly of the present invention.

[0028] Figure 7 This is a cross-sectional view of the main structure of another embodiment of the underwater hydraulic gate opener of the present invention;

[0029] Figure 8 yes Figure 7 A schematic diagram of the local structure at point C.

[0030] The diagram shows:

[0031] 3-Underwater hydraulic gate hoist; 32-Cylinder body; 33-End cover; 34-Piston rod; 35-Lifting lug;

[0032] 41- Primary filter; 42- Secondary filter; 43- Check valve;

[0033] 51-Flexible protective cover; 52-Front cover; 53-Rear cover;

[0034] 6-Cable assembly; 61-Cable; 62-Snorkel; 63-Protective layer;

[0035] 7-Guide assembly; 71-Sealing groove; 72-Sealing ring; 74-Power assembly; 75-Sealed chamber; Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, all directional indications (such as up, down, left, right, front, back, bottom, etc.) in this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, descriptions involving "first," "second," etc., in this application are for descriptive purposes only.

[0039] Example 1

[0040] like Figure 1-3 As shown, this embodiment provides an underwater hydraulic gate hoist, including a power unit, a hydraulic cylinder, a flexible protection component, and a filter component. The power unit includes a hydraulic pump and an oil tank. The hydraulic cylinder includes a cylinder body 32, an end cap 33, a piston rod 34, and a piston. One end of the piston rod 34 is sealed to the cylinder body 32 through the end cap 33, and the other end extends out of the hydraulic cylinder to form an external action part. The tail end of the external action part is provided with a lifting lug 35.

[0041] like Figure 3 and Figure 5 As shown, the flexible protection assembly includes a flexible protective sleeve 51 and a connecting cover. The connecting cover includes a front cover 52 and a rear cover 53. One end of the flexible protective sleeve 51 is sealed to the lug 35 of the piston rod 34's outer working part via the front cover 52, and the other end is sealed to the end cover 33 via the rear cover 53. The flexible protective sleeve 51 has a telescopic structure and a certain strength. The flexible protection assembly, the cylinder's end cover, and the piston rod 34's outer working part are sealed together to form a flexible chamber. The flexible chamber contains water medium, and its volume can increase or decrease as the piston rod 34 moves and expands.

[0042] In other embodiments not shown, the flexible protective sleeve may not have a connecting cap. One end is directly sealed to the piston rod connector, and the other end is directly sealed to the end cap or cylinder body. This can also form a sealed flexible chamber and isolate it from external water.

[0043] like Figure 3-4 As shown, a filter assembly is installed on the cylinder body 32. The filter assembly includes a primary filter 41, a secondary filter 42, a check valve 43, and pipes. The primary filter inlet 41 has inlet and outlet ports. The check valve 43 is installed at the inlet and outlet ports of the primary filter 41, and is arranged in reverse to form an inlet check valve and an outlet check valve, which are used to prevent aquatic organisms such as shellfish and algae from entering the filter when the hydraulic cylinder is not in operation. One end of the secondary filter 42 is connected to the primary filter 41 through a pipe, and the other end serves as the filter outlet and is sealed to a water passage hole on the rear cover 53 through a pipe, thereby communicating with the flexible chamber.

[0044] In other embodiments not shown, a filter assembly may be omitted, and the flexible protective sleeve may be directly and sealed to the piston rod and hydraulic cylinder. The flexible chamber contains water or other liquids. The flexible protective sleeve is made of rubber material and has good elasticity. When the piston rod moves in extension and retraction, the flexible protective sleeve deforms accordingly with the movement of the piston rod.

[0045] The primary filter 41 uses a filter screen to isolate and filter out small aquatic organisms and debris in the water. The secondary filter 42 uses a membrane to filter out heavy metals, calcium and other substances that easily adhere to and accumulate in the water, thus softening the water quality.

[0046] Under the influence of the internal and external pressure difference, the check valve 43 at the inlet allows liquid to flow into the filter assembly and restricts its outflow, while the check valve 43 at the outlet allows liquid to flow out of the filter assembly and restricts its inflow. The check valves ensure that the filter only exchanges water with the external water body when the flexible chamber expands and contracts, thus avoiding unnecessary operation of the filter and reducing its actual service life. After water flows through the filter assembly, impurities mixed in are reduced or even eliminated, ensuring continuous contact between the piston rod 34 and clean water. This avoids or mitigates damage to the piston rod 34 caused by scaling and rust, extending its service life.

[0047] When the hydraulic cylinder retracts, the water medium in the flexible chamber passes through the primary and secondary filters. The water flow can cause the filtered material to move in the opposite direction and leave the filter, which can achieve the function of backwashing and extend the service life.

[0048] In other embodiments not shown, the filtration assembly may be configured as a filter, with one end connected to a pipe or directly sealed to a flexible protective component, and the other end having an inlet check valve 43 and an outlet check valve 43 configured in opposite directions. The inlet check valve 43 and the outlet check valve 43 control the flow of water through the filter by one-way action, thereby balancing the pressure inside and outside the filter and the water environment and preventing unnecessary water exchange.

[0049] In this embodiment of the underwater hydraulic gate hoist, when piston rod 2 needs to extend, the hydraulic cylinder is driven by the hydraulic pump, causing piston rod 34 to extend. At this time, the volume of the flexible chamber formed between the hydraulic cylinder, the external action part of piston rod 34, and the flexible protection component increases, and the internal pressure of the flexible chamber and filter decreases. Water flows in through the inlet check valve and is then replenished to the flexible chamber after being filtered by the primary and secondary filters 42. When piston rod 2 needs to retract, the hydraulic cylinder drives piston rod 34 to retract, reducing the volume of the flexible chamber formed between piston rod 34 and the flexible protection component, increasing the internal pressure. The water in the flexible chamber is discharged through the primary and secondary filters 42 and the outlet check valve 43, restoring the relative balance of internal and external pressures. During this process, piston rod 34 remains in contact with the filtered water through the action of the flexible protection component and the filter component, unaffected by external water impurities or aquatic organisms.

[0050] like Figure 1 and 6 As shown, the underwater hydraulic gate hoist in this embodiment includes a cable assembly 6, which comprises a cable 61, a breathing tube 62, and a protective layer 63. The breathing tube 62 and the cable are housed together within the protective layer 63. When the cable 61 is connected, it controls the operation of the power unit. One end of the breathing tube is connected to the oil tank, and the other end is connected above the water surface to communicate with the outside air. When the power unit is running, the gate hoist is positioned underwater, and the air pressure in its oil tank will change with the movement of the hoist. However, thanks to the breathing tube, the pressure remains constant compared to the outside air pressure.

[0051] Regarding the overall configuration of the breathing tube 62, in other embodiments not shown, the breathing tube 62 can be separately wrapped around the outer layer of the cable. Regarding the port connection of the breathing tube 62, in other embodiments not shown, a gas filter device can be provided at the second end of the breathing tube 62 to prevent dust and other impurities from entering the fuel tank during intake and exhaust, thereby achieving the effect of balancing the pressure inside and outside the fuel tank while ensuring service life.

[0052] Example 2

[0053] The structure of this embodiment is largely the same as that of the first embodiment, except that, as Figure 7-8In this embodiment, a guide assembly 7 is formed at the connection position between the hydraulic cylinder end cap 33 and the cylinder body 32. The guide assembly 7 includes an end cap and a guide sleeve. The piston rod is telescopically connected to the hydraulic cylinder via the guide assembly. The end cap portion and the guide sleeve portion of the guide assembly 7 are respectively provided with sealing grooves 71, and each sealing groove 71 is provided with a sealing ring 72.

[0054] Figure 8 The sealing ring 72 on the right side is responsible for maintaining internal pressure to prevent hydraulic oil leakage, while the sealing ring 72 on the left side is used to resist the liquid pressure from the flexible chamber outside the hydraulic cylinder and water at a certain depth, preventing liquid from the flexible chamber from entering the hydraulic cylinder and causing pressure leakage and damage. The two sealing rings 72 provide a bidirectional sealing function. In other embodiments not shown, both sealing rings may also be located on the guide assembly formed by the guide sleeve.

[0055] In addition, the power assembly 74 in this embodiment also includes a hydraulic pump and an oil tank, and a sealed chamber 75 is provided on the outside. One end of the cable assembly 6 is connected to the sealed chamber, and the other end extends to the surface of the water. The cable assembly includes a cable, a breathing tube and a protective layer. The breathing tube and the cable are set together in the protective layer, thereby realizing the communication between the sealed chamber and the oil tank and the outside world and the air pressure compensation.

[0056] The specific embodiments of the present invention have been described above. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of the present invention.

Claims

1. An underwater hydraulic gate opener, comprising a hydraulic cylinder, a piston rod (34), and a power assembly, wherein the piston rod (34) extends out of the hydraulic cylinder to form an external actuating part, characterized in that: It also includes a flexible protection component, which, together with the hydraulic cylinder and the external action part, forms a flexible chamber. The flexible chamber protects the external action part of the piston rod from direct contact with the water outside the chamber.

2. The underwater hydraulic gate hoist according to claim 1, characterized in that: The hydraulic cylinder includes an end cap (33) and a cylinder body (32). One end of the flexible protection component is sealed to the end cap (33) or the cylinder body (32), and the other end is sealed to the tail end of the piston rod (34) external action part.

3. The underwater hydraulic gate hoist according to claim 1, characterized in that: The flexible protection component includes a flexible protective sleeve (51). When the piston rod (34) extends or retracts from the hydraulic cylinder, it drives the flexible protective sleeve to extend and retract.

4. The underwater hydraulic gate hoist according to claim 1, characterized in that: The hydraulic cylinder and piston rod (34) are fitted together to form a guide assembly (7). Two sets of sealing grooves (71) are provided in the guide assembly (7), and a sealing ring (72) is provided in the sealing groove (71).

5. The underwater hydraulic gate hoist according to claim 1, characterized in that: It also includes a filtration assembly, which includes a filter having an inlet end and an outlet end, the outlet end of which is connected to the flexible chamber.

6. The underwater hydraulic gate hoist according to claim 5, characterized in that: The flexible chamber contains a fluid medium, and its volume can be varied by the discharge or intake of fluid through a filtration assembly.

7. The underwater hydraulic gate hoist according to claim 5 or 6, characterized in that: When the piston rod (34) extends or retracts from the hydraulic cylinder, it causes the volume of the flexible chamber to increase or decrease.

8. The underwater hydraulic gate hoist according to claim 5, characterized in that: The filter has two inlet and outlet ports, each equipped with a check valve (43) with opposite directions of action.

9. The underwater hydraulic gate hoist according to claim 5, characterized in that: The filtration assembly includes a primary filter (41) and a secondary filter (42). The primary filter (41) has a filter screen inside and an inlet / outlet port. The secondary filter (42) has a diaphragm inside. One end of the secondary filter (42) is connected to the primary filter (41), and the other end is connected to the flexible chamber.

10. The underwater hydraulic gate hoist according to claim 1, characterized in that: It also includes a cable assembly (6), the power assembly including a sealed chamber (75) which is connected above the water surface via the cable assembly (6).

11. The underwater hydraulic gate hoist according to claim 1 or 10, characterized in that: It also includes a breathing tube (62), one end of which is connected to the air above the water surface and the other end is connected to the power unit.

12. The underwater hydraulic gate hoist according to claim 10, characterized in that: The cable assembly (6) includes a cable (61) and a protective layer (63). The breathing tube (62) and the cable (61) are built into the protective layer (63). One end of the breathing tube (62) is connected to the air above the water surface, and the other end is connected to the fuel tank of the power assembly.

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