Underwater hydraulic hoist

Abstract

The utility model provides an underwater hydraulic hoist which comprises a hydraulic cylinder, a piston rod and a power assembly, the part, extending out of the hydraulic cylinder, of the piston rod forms an external acting part, the underwater hydraulic hoist further comprises a flexible protection assembly and a filtering assembly, and the flexible protection assembly, the hydraulic cylinder and the external acting part are connected in a sealed mode to form a flexible bin. And the flexible bin is communicated with the filtering assembly. The filtering assembly comprises a filter, the filtering-out end of the filter is in sealed connection with the flexible bin, and the filtering-in end is provided with a check valve. And the breathing tube is arranged in the cable assembly. According to the underwater hydraulic hoist, through the flexible protection assembly and the filtering assembly, it is guaranteed that the acting part outside the piston rod is separated from external dirty water, and the problem of sealing damage or leakage caused by scaling and the like of the piston rod is solved. The utility model has the advantages of simple structure, reliable operation, convenient installation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, and in particular to an underwater hydraulic hoist. Background Art

[0002] Hydraulic gate hoist is a commonly used opening and closing equipment in water conservancy projects and has a wide range of applications. However, when the hydraulic gate hoist is used in water, the surface of the piston rod is prone to adhesion, which in turn damages the cylinder seals. Therefore, the service life of the hydraulic gate hoist in water is difficult to guarantee. When the hydraulic gate hoist is arranged as a whole underwater, there are also problems such as the sealing of the power system and the negative pressure caused by the change in the internal volume of the cylinder, which makes the hydraulic gate hoist less effective underwater. Utility Model Content

[0003] In response to the defects in the existing technology, the purpose of the present utility model is to provide an underwater hydraulic gate opening and closing machine that can operate underwater, which uses a flexible protective cover to separate the piston rod from external impurity water, thereby reducing damage to the piston rod during long-term operation, and is provided with a pressure balancing component.

[0004] According to the underwater hydraulic opening and closing machine provided by the utility model, it includes a hydraulic cylinder, a piston rod and a power assembly. The piston rod extends out of the hydraulic cylinder to form an external action part. It also includes a flexible protection assembly. The flexible protection assembly, the hydraulic cylinder and the external action part form a flexible warehouse. The flexible warehouse protects the external action part of the piston rod from directly contacting the water outside the warehouse.

[0005] Preferably, the hydraulic cylinder includes an end cover and a cylinder body, one end of the flexible protection component is sealed connected to the end cover or the cylinder body, and the other end is sealed connected to the tail end of the outer action part of the piston rod.

[0006] Preferably, the flexible protection assembly includes a flexible protection sleeve, and when the piston rod extends or retracts the hydraulic cylinder, the flexible protection sleeve is driven to extend and retract.

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

[0008] Preferably, it further comprises a filter assembly, the filter assembly comprises a filter, the filter has a filter inlet end and a filter outlet end, and the filter outlet end of the filter is communicated with the flexible compartment.

[0009] Preferably, the flexible tank contains a fluid medium or water, and the volume of the flexible tank can be changed by discharging or sucking the fluid through the filter assembly.

[0010] Preferably, when the piston rod extends or retracts into the hydraulic cylinder, the volume of the flexible bin increases or decreases.

[0011] Preferably, the filter inlet end of the filter comprises two liquid inlet and outlet ports, each of which is provided with a check valve with opposite action directions.

[0012] Preferably, the filter assembly includes a primary filter and a secondary filter, the primary filter is provided with a filter screen inside and has a liquid inlet and outlet; the secondary filter is provided with a diaphragm, one end of the secondary filter is connected to the primary filter, and the other end is connected to the flexible warehouse.

[0013] Preferably, it further includes a cable assembly, the power assembly includes a sealed cabin, and the sealed cabin is connected to the water surface through 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 also 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 oil tank of the power assembly.

[0016] According to the description of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The underwater hydraulic hoist provided by this utility model employs a flexible protective assembly disposed outside the hydraulic cylinder and piston rod. This assembly is sealed to the piston rod and hydraulic cylinder to form a flexible chamber, which is then connected to a filter. This separates the liquid within the flexible chamber from the external water, thereby preventing scaling on the piston rod and damage to the seal between the piston rod and hydraulic cylinder, thus extending the service life of the equipment.

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

[0019] 3. The cable assembly of the underwater hydraulic gate hoist provided by this utility model includes a breathing tube that connects the oil tank to the outside world. The breathing tube ensures air pressure balance during operation of the power assembly, with a simple design and reliable performance. Furthermore, the breathing tube is built into the integrated cable, making it easy to install and protect.

[0020] 4. The underwater hydraulic gate hoist provided by the present invention has a guide assembly designed as a bidirectional sealing structure, which bears the pressure inside the oil cylinder and the external water pressure respectively, thereby improving the sealing reliability and service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 It is a structural schematic diagram of the utility model underwater hydraulic hoist.

[0023] Figure 2 It is a front view of the underwater hydraulic hoist of the utility model.

[0024] Figure 3 yes Figure 2 DD cross-sectional view of the underwater hydraulic hoist.

[0025] Figure 4 It is a structural schematic diagram of a filter assembly of an underwater hydraulic hoist of the present utility model.

[0026] Figure 5 The utility model is a schematic diagram of the local structure of the connection between the flexible protective cover and the filter of the underwater hydraulic hoist.

[0027] Figure 6 It is a cross-sectional view of the cable assembly of the underwater hydraulic hoist of the utility model.

[0028] Figure 7 This is a cross-sectional view of the main structure of another embodiment of the underwater hydraulic hoist of the utility model;

[0029] Figure 8 yes Figure 7 Schematic diagram of the local structure at point C in the middle.

[0030] The figure shows:

[0031] 3- underwater hydraulic 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-back cover;

[0034] 6-cable assembly; 61-cable; 62-breathing tube; 63-protective layer;

[0035] 7-guide assembly; 71-sealing groove; 72-sealing ring; 74-power assembly; 75-sealing cabin; DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

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

[0039] First embodiment

[0040] like Figure 1-3 As shown, this embodiment provides an underwater hydraulic hoist, comprising a power assembly, a hydraulic cylinder, a flexible protective assembly, and a filter assembly. The power assembly 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 via the end cap 33, and the other end extends out of the hydraulic cylinder to form an external action portion. The tail end of the external action portion is provided with a lifting lug 35.

[0041] like Figure 3 and Figure 5 As shown, the flexible protective assembly includes a flexible protective sleeve 51 and connecting covers, which include a front cover 52 and a rear cover 53. One end of the flexible protective sleeve 51 is sealed to the ear 35 on the outer portion of the piston rod 34 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 is a retractable structure with a certain strength. The flexible protective assembly, the end cover of the cylinder body, and the outer portion of the piston rod 34 are sealed together to form a flexible chamber. The flexible chamber contains water, and its volume can expand or contract with the movement of the piston rod 34.

[0042] In other embodiments not shown, the flexible protective sleeve may not be provided with a connecting cover, and one end may be directly and sealedly connected to the piston rod connector, and the other end may be directly and sealedly connected to the end cover or cylinder body, which can also form a sealed flexible chamber and serve to isolate it from external water bodies.

[0043] like Figure 3-4 As shown, a filter assembly is mounted on the cylinder body 32. The filter assembly comprises a primary filter 41, a secondary filter 42, a check valve 43, and a pipeline. The primary filter inlet 41 is provided with a water inlet and outlet. Check valves 43 are positioned at the inlet and outlet of the primary filter 41, and are arranged in opposite directions to form an inlet check valve and an outlet check valve. These valves are used to prevent aquatic organisms such as shellfish and algae from entering the filter when the hydraulic cylinder is not operating. One end of the secondary filter 42 is connected to the primary filter 41 via a pipeline. The other end, serving as the filter outlet, is sealed via a pipeline to a water hole provided in the rear cover 53, thereby communicating with the flexible chamber.

[0044] In other embodiments not shown, the filter assembly may not be provided, and the flexible protective cover may be directly and sealedly connected to the piston rod and the hydraulic cylinder. The flexible chamber contains water medium or other liquids. The flexible protective cover is made of rubber material and has good elasticity. When the piston rod performs telescopic movement, the flexible protective cover deforms accordingly following the movement of the piston rod.

[0045] The first filter 41 is provided with a filter screen to isolate and filter small aquatic organisms and garbage in the water, and the second filter 42 is provided with a diaphragm to filter heavy metals, calcium and other substances that are easily attached and accumulated in the water body, thereby softening the water quality.

[0046] Driven by the internal and external pressure differential, check valve 43 at the water inlet allows liquid to flow into the filter assembly while restricting outflow. Check valve 43 at the water outlet allows liquid to flow out of the filter assembly while restricting inflow. The check valves ensure that the filter only exchanges water with the outside world when the flexible chamber expands or contracts, thus avoiding unnecessary filter operation that could reduce its actual service life. After water passes through the filter assembly, impurities are reduced or even eliminated, ensuring continuous contact between piston rod 34 and clean water. This prevents or mitigates damage to the piston rod 34 caused by scaling and rusting, thereby extending its service life.

[0047] When the oil cylinder contracts, the water medium in the flexible bin passes through the primary and secondary filters. The flow of water can drive the filtered substances to move in the reverse direction and leave the filters, playing a reverse flushing function and achieving the effect of extending the service life.

[0048] In other embodiments not shown, the filter assembly can be configured as a filter, one end of which is sealedly connected to the flexible protective assembly via a pipe or directly, and the other end of which has an inlet check valve 43 and an outlet check valve 43 arranged in opposite directions. The inlet check valve 43 and the outlet check valve 43 control the flow of water in the filter through a one-way action, thereby achieving internal and external pressure balance between the filter and the water environment and preventing unnecessary water exchange.

[0049] In the underwater hydraulic gate opening and closing machine of this embodiment, when the piston rod 2 needs to be extended, the hydraulic cylinder is driven by the hydraulic pump to act on the piston rod 34 to extend. At this time, the volume of the flexible chamber formed between the hydraulic cylinder, the external acting part of the piston rod 34 and the flexible protection component increases, the internal pressure of the flexible chamber and the filter decreases, and the water flows into the flexible chamber through the inlet check valve and is replenished to the flexible chamber after being filtered by the first and second level filters 42; when the piston rod 2 needs to be retracted, the hydraulic cylinder drives the piston rod 34 to contract, the volume of the flexible chamber formed between the piston rod 34 and the flexible protection component decreases, the internal pressure increases, and the water in the flexible chamber is discharged through the outlet check valve 43 through the first and second level filters 42, thus re-establishing a relative balance between the internal and external pressures. During this process, the piston rod 34 is always in contact with the filtered water through the action of the flexible protection component and the filter component, and is not affected 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 includes a cable 61, a breathing tube 62, and a protective layer 63. The breathing tube 62 and the cable are disposed together within the protective layer 63. When the cable 61 is connected, it controls the operation of the power assembly. The first end of the breathing tube is connected to the oil tank, and the second end is connected to the water surface to communicate with the outside air. When the power assembly is operating, the gate hoist is disposed underwater, and the air pressure in its oil tank will tend to change with the movement of the gate hoist. Under the action of the breathing tube and the external air pressure, the pressure can be kept constant.

[0051] Regarding the overall configuration of the breathing tube 62, in other embodiments not shown, the breathing tube 62 can be separately encased in the outer layer of the cable. Regarding the port connection of the breathing tube 62, in other embodiments not shown, a gas filter can be installed 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 ensuring service life while achieving the effect of balancing the internal and external pressures of the fuel tank.

[0052] Second embodiment

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

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

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

[0056] The above describes the specific embodiments of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the scope of the technical concept of this utility model.

Claims

1. An underwater hydraulic hoist, 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 action portion, characterized in that: It also includes a flexible protection component, which, together with the hydraulic cylinder and the external acting part, forms a flexible bin. The flexible bin protects the external acting part of the piston rod from directly contacting the water outside the bin.

2. The underwater hydraulic hoist according to claim 1, characterized in that: The hydraulic cylinder comprises an end cover (33) and a cylinder body (32); one end of the flexible protection component is sealedly connected to the end cover (33) or the cylinder body (32), and the other end is sealedly connected to the tail end of the outer action part of the piston rod (34).

3. The underwater hydraulic hoist according to claim 1, characterized in that: The flexible protection assembly comprises a flexible protection sleeve (51), and when the piston rod (34) extends or retracts into the hydraulic cylinder, the flexible protection sleeve is driven to extend and retract.

4. The underwater hydraulic hoist according to claim 1, characterized in that: A guide assembly (7) is formed at the sleeve connection position of the hydraulic cylinder and the piston rod (34). Two groups of sealing grooves (71) are opened in the guide assembly (7), and sealing rings (72) are arranged in the sealing grooves (71).

5. The underwater hydraulic hoist according to claim 1, characterized in that: It also includes a filter assembly, which includes a filter. The filter has a filter inlet end and a filter outlet end, and the filter outlet end of the filter is communicated with the flexible bin.

6. The underwater hydraulic hoist according to claim 5, characterized in that: The flexible tank contains a fluid medium, and the volume of the flexible tank can be changed by discharging or sucking the fluid through the filter assembly.

7. The underwater hydraulic hoist according to claim 5 or 6, characterized in that: When the piston rod (34) extends out of or retracts into the hydraulic cylinder, the volume of the flexible bin is driven to increase or decrease.

8. The underwater hydraulic hoist according to claim 5, characterized in that: The filter inlet end of the filter comprises two liquid inlets and outlets, each of which is provided with a check valve (43) with opposite action directions.

9. The underwater hydraulic hoist according to claim 5, characterized in that: The filter assembly comprises a primary filter (41) and a secondary filter (42). The primary filter (41) is provided with a filter screen inside and has a liquid inlet and outlet. The secondary filter (42) is provided with a diaphragm inside. One end of the secondary filter (42) is connected to the primary filter (41), and the other end is communicated with the flexible bin.

10. The underwater hydraulic hoist according to claim 1, characterized in that: It also includes a cable assembly (6), the power assembly includes a sealed cabin (75), and the sealed cabin (75) is connected to the surface of the water through the cable assembly (6).

11. The underwater hydraulic 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 assembly.

12. The underwater hydraulic hoist according to claim 10, characterized in that: The cable assembly (6) comprises a cable (61) and a protective layer (63), wherein the breathing tube (62) and the cable (61) are embedded in the protective layer (63), and one end of the breathing tube (62) is connected to the air above the water surface, and the other end is connected to the oil tank of the power assembly.

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