阅读说明：本技术 一种宽范围高度可调液压升降装置及其控制方法 (Wide-range height-adjustable hydraulic lifting device and control method thereof ) 是由 胡圣鑫 杨波 江晨 李辉 吴从焰 冯立杰 于 2021-08-26 设计创作，主要内容包括：本发明提供了一种宽范围高度可调液压升降装置,包括支撑机构、移动机构、油路系统及升降高度测量装置。移动机构与测量装置均安装于支撑机构上；油路系统与支撑机构连接；支撑机构是液压升降装置的的主体结构,用于安装移动机构、油路系统及测量装置；移动机构用于转移升降装置,移动机构分为两部分,分别固定于支撑机构和油路系统上；油路系统用于存储和输送液压油,其安装于支撑机构上；测量装置用于升降装置位置目视化,其测量及标定装置分别安装于支撑机构及油路系统上。该液压升降装置可通过手动换向阀实现油缸运动方向转换,升降行程大,可根据使用工况随时调整；同时利用手摇泵实现装置升降,对工作场合电气无要求,可适用于多种工作场合。(The invention provides a hydraulic lifting device with a wide-range height adjustable, which comprises a supporting mechanism, a moving mechanism, an oil circuit system and a lifting height measuring device. The moving mechanism and the measuring device are both arranged on the supporting mechanism; the oil circuit system is connected with the supporting mechanism; the supporting mechanism is a main body structure of the hydraulic lifting device and is used for installing the moving mechanism, the oil circuit system and the measuring device; the moving mechanism is used for transferring the lifting device and is divided into two parts which are respectively fixed on the supporting mechanism and the oil way system; the oil way system is used for storing and conveying hydraulic oil and is arranged on the supporting mechanism; the measuring device is used for visualizing the position of the lifting device, and the measuring and calibrating device is respectively arranged on the supporting mechanism and the oil circuit system. The hydraulic lifting device can realize the conversion of the movement direction of the oil cylinder through the manual reversing valve, has large lifting stroke and can be adjusted at any time according to the use working condition; meanwhile, the device is lifted by utilizing the hand pump, has no electrical requirements on working occasions, and is suitable for various working occasions.)

1. The hydraulic lifting device with the adjustable height in the wide range is characterized by comprising a supporting mechanism (1), a moving mechanism (2), an oil circuit system (3) and a lifting height measuring device (4).

The moving mechanism (2) and the measuring device (4) are both arranged on the supporting mechanism (1); the oil circuit system (3) is connected with the supporting mechanism (1); the supporting mechanism (1) is a main body structure of the hydraulic lifting device and is used for installing the moving mechanism (2), the oil circuit system (3) and the measuring device (4); the moving mechanism (2) is used for transferring the lifting device, and the moving mechanism (2) is divided into two parts which are respectively fixed on the supporting mechanism (1) and the oil way system (3); the oil way system (3) is used for storing and conveying hydraulic oil and is arranged on the supporting mechanism (1); the measuring device (4) is used for visualizing the position of the lifting device, and measuring and calibrating devices of the measuring device are respectively arranged on the supporting mechanism (1) and the oil way system (3).

2. A hydraulic lifting device with a wide range of height adjustment according to claim 1, characterized in that the support mechanism (1) comprises a base (11) and an intermediate support bar (12);

the base (11) is used for supporting the whole hydraulic lifting device, and the middle supporting rod (12) is installed on the base (11) and used for supporting the oil circuit system (3) and the measuring device (4).

3. A hydraulic lifting device with a wide range of height adjustments according to claim 1, characterized in that the moving mechanism (2) comprises a roller (21) and a moving handle (22);

the roller (21) is installed on the base (11), the moving handle (22) is installed on the oil cylinder body (311) of the oil circuit system (3), and the roller (21) and the moving handle (22) are matched for use, so that the lifting device is convenient to transfer.

4. The hydraulic lifting device with the adjustable height within the wide range according to claim 1, wherein the oil circuit system comprises an oil cylinder (31), a one-way balance valve (32), an oil tank (33), a hand-operated pump rocker (34), a hand-operated pump (35), a hand-operated reversing valve (36) and an oil pipe (37);

the oil cylinder comprises an oil cylinder body (311), a piston (312) and a claw type lifting bracket (314) arranged on the oil cylinder body, the lower end of the piston (312) is connected with the base (11), the upper end of the piston (312) is matched with the inner wall of the oil cylinder body (311), the lower end of the piston (312) is connected with the oil cylinder body (311) through a lower sealing ring (313), and the oil cylinder body (311) makes linear reciprocating motion relative to the piston (312);

the one-way balance valve (32), the oil tank (33), the hand pump (35) and the manual reversing valve (36) are all arranged on the oil cylinder body (311) and can move along with the oil cylinder body (311);

the oil pipe (37) is used for connecting the oil tank (33), the oil cylinder (31), the hand pump (35) and the one-way balance valve (32) and is used as a hydraulic oil transmission pipeline.

The oil tank (33), the one-way balance valve (32), the manual reversing valve (36) and the hand pump (35) are all fixed on the oil tank cylinder body (311), and two oil pipes are arranged between the oil tank (33) and the hand pump (35) for conveying or recovering hydraulic oil; two oil pipes are connected between the hand pump (35) and the one-way balance valve (32) and are used for conveying or recovering hydraulic oil; the one-way balance valve (32) is connected with the cylinder body (311) through two oil pipes and is used for conveying or recycling hydraulic oil.

5. A hydraulic lifting device with a wide range of height adjustments according to claim 1 characterised in that the support bracket (12) is replaceable to accommodate different types of equipment.

6. A hydraulic lifting device with a wide range of height adjustment according to claim 1,

the hand pump rocker (34) and the hand pump (35) can be separated, and when the lifting device does not need to move, the hand pump rocker (34) is detached and fixed on the oil cylinder body (311), so that the lifting device is compact in overall structure and convenient to store and transport.

7. A hydraulic lifting device with adjustable height within a wide range according to claim 1, characterized in that the lifting height measuring device (4) comprises a visual dimension measuring mechanism (41);

the size visual measuring mechanism (41) is arranged on the oil cylinder body (311) and used for observing the lifting height of the hydraulic lifting device.

8. A wide range height adjustable hydraulic lifting device according to claim 1 wherein the number of demands for the combined use of the wide range height adjustable hydraulic lifting device is calculated based on the load type, each set of hydraulic lifting device being operated by one person.

9. A method of controlling a wide range of height adjustable hydraulic lifting device according to claim 1, comprising the steps of;

firstly, respectively connecting at least one set of hydraulic lifting device with adjustable height within a wide range with lifted equipment; turning a handle of a manual reversing valve (36) of the oil circuit system (3) to a lifting state position;

secondly, an operator shakes the hand-operated pump (35) by using a hand-operated pump rocker (34) equipped for each set of hydraulic lifting device, at the moment, hydraulic oil in the oil tank (33) reaches an upper oil cavity of the oil cylinder body (311) through a reversing valve (36) and a one-way balance valve (32), the oil cylinder body (311) is slowly lifted under the action of the hydraulic oil along with the continuous increase of the hydraulic oil in the upper oil cavity, and then a claw type support bracket (12) fixed with the oil cylinder body and lifted equipment connected with the oil cylinder body are driven to ascend, the marking of a steel tape (41) on the lifting device and the lifting condition of the lifted equipment are observed while shaking the hand-operated pump rocker (34), the synchronous motion of each set of hydraulic lifting device is ensured as much as possible, and the operation is stopped when the lifted equipment reaches a designated height; at the moment, the reversing valve (36) is adjusted to be in a hovering state, hydraulic oil in the oil applying cavity is kept still, and at the moment, the device is kept in the hovering state;

thirdly, when the hydraulic lifting device is withdrawn, firstly, the manual reversing valve (36) is rotated to a descending state position, each operator simultaneously shakes the hand-operated pump rocker (34), at the moment, hydraulic oil in the upper oil cavity returns to the oil tank (33) through the one-way balance valve (32) and the reversing valve (36), at the moment, the oil cylinder body (311) and the claw type supporting bracket (12) fixed with the oil cylinder body can descend until the lifting device recovers to the initial height;

fourthly, when the folding is finished, the manual reversing valve (36) is turned to the middle position, and the hand pump rocker (34) is detached and fixed on the cylinder body (311) of the oil cylinder; the lifting device is inclined backwards by holding the movable handle (22), and the device is pushed or pulled to move after the roller (21) is contacted with the ground.

Technical Field

The invention relates to the technical field of lifting devices, in particular to a hydraulic lifting device with a wide-range height adjustable and a using method thereof.

Background

When transporting some heavy equipment, often need carry out the operation of going up and down to equipment, at this in-process, not only have the requirement to equipment lifting process, equipment descending process also needs controllable, and it is too big to strike when avoiding heavy equipment to rely on self gravity to descend, causes the damage to equipment itself or elevating gear. When traditional heavy equipment is lifted, large automatic hoisting equipment such as a crane or a travelling crane is generally utilized, and in many workplaces, the large hoisting equipment cannot enter or be installed, and the electrical conditions of some workplaces cannot meet the requirements of the automatic hoisting equipment; meanwhile, the stroke and the bearing capacity of the traditional portable lifting equipment are small, and the long-stroke lifting operation of the heavy equipment cannot be completed.

In order to solve the problem of completing the lifting of heavy equipment in places with limited working conditions, the invention provides a manual operation hydraulic lifting device with adjustable height in a wide range, which meets the lifting requirements of heavy equipment in various occasions and sizes. The load capacity of a single set of hydraulic lifting device is 5000kg at most, and the lifting height can reach 900 mm.

Disclosure of Invention

The hydraulic lifting device with the adjustable height within the wide range comprises a supporting mechanism 1, a moving mechanism 2, an oil way system 3 and a lifting height measuring device 4.

The moving mechanism 2 and the measuring device 4 are both arranged on the supporting mechanism 1; the oil way system 3 is connected with the supporting mechanism 1; the supporting mechanism 1 is a main body structure of the hydraulic lifting device and is used for installing the moving mechanism 2, the oil circuit system 3 and the measuring device 4; the moving mechanism 2 is used for transferring the lifting device, and the moving mechanism 2 is divided into two parts which are respectively fixed on the supporting mechanism 1 and the oil circuit system 3; the oil way system 3 is used for storing and conveying hydraulic oil and is arranged on the supporting mechanism 1; the measuring device 4 is used for visualizing the position of the lifting device, and measuring and calibrating devices of the measuring device are respectively arranged on the supporting mechanism 1 and the oil circuit system 3.

Preferably, the support mechanism 1 comprises a base 11 and an intermediate support bar 12;

the base 11 is used for supporting the whole hydraulic lifting device, and the middle supporting rod 12 is installed on the base 11 and used for supporting the oil circuit system 3 and the measuring device 4.

Preferably, the moving mechanism 2 comprises a roller 21 and a moving handle 22;

the roller 21 is installed on the base 11, the moving handle 22 is installed on the oil cylinder body 311 of the oil circuit system 3, and the roller 21 and the moving handle 22 are matched for use, so that the lifting device is convenient to transfer.

Preferably, the oil circuit system comprises an oil cylinder 31, a one-way balance valve 32, an oil tank 33, a hand pump rocker 34, a hand pump 35, a manual reversing valve 36 and an oil pipe 37;

the oil cylinder comprises an oil cylinder body 311, a piston 312 and a claw type lifting bracket 314 arranged on the oil cylinder body, the lower end of the piston 312 is connected with the base 11, the upper end of the piston 312 is matched with the inner wall of the oil cylinder body 311, the lower end of the piston 312 is connected with the oil cylinder body 311 through a lower sealing ring 313, and the oil cylinder body 311 does linear reciprocating motion relative to the piston 312;

the one-way balance valve 32, the oil tank 33, the hand pump 35 and the manual reversing valve 36 are all arranged on the cylinder body 311 and can move along with the cylinder body 311;

the oil pipe 37 is used for connecting the oil tank 33, the oil cylinder 31, the hand pump 35 and the one-way balance valve 32 and is used as a hydraulic oil transmission pipeline.

The oil tank 33, the one-way balance valve 32, the manual reversing valve 36 and the hand pump 35 are all fixed on the oil tank cylinder body 311, and two oil pipes are connected between the oil tank 33 and the hand pump 35 and used for conveying or recycling hydraulic oil; two oil pipes are connected between the hand pump 35 and the one-way balance valve 32 and are used for conveying or recovering hydraulic oil; the one-way balance valve 32 is connected with the cylinder body 311 through two oil pipes and is used for conveying or recycling hydraulic oil;

preferably, the support carrier 12 is replaceable to accommodate different types of equipment.

Preferably, the hand pump rocker 34 and the hand pump 35 can be separated, and when the lifting device does not need to be operated, the hand pump rocker 34 is detached and fixed on the cylinder body 311, so that the lifting device is compact in overall structure and convenient to store and transport.

Preferably, the lifting height measuring device 4 comprises a dimension visualization measuring mechanism 41;

the size visual measuring mechanism 41 is installed on the cylinder body 311 and used for observing the lifting height of the hydraulic lifting device.

Preferably, the number of demands for the combined use of the wide-range height-adjustable hydraulic lifting devices is calculated according to the load type, and each set of hydraulic lifting devices is operated by one person.

The invention also provides a control method of the hydraulic lifting device with the adjustable height in the wide range, which is characterized by comprising the following steps;

firstly, respectively connecting at least one set of hydraulic lifting device with adjustable height within a wide range with lifted equipment; turning the handle of the manual reversing valve 36 of the oil way system 3 to a lifting state position;

secondly, an operator uses a manual pump rocker 34 equipped for each set of hydraulic lifting device to shake a hand pump 35, at the moment, hydraulic oil in an oil tank 33 reaches an upper oil cavity of an oil cylinder body 311 through a reversing valve 36 and a one-way balance valve 32, the oil cylinder body 311 is slowly lifted under the action of the hydraulic oil along with the continuous increase of the hydraulic oil in the upper oil cavity, and then a claw type support bracket 12 fixed with the oil cylinder body and lifted equipment connected with the oil cylinder body are driven to ascend, the steel tape 41 scribed lines on the lifting device and the lifting conditions of the lifted equipment are observed while the hand pump rocker 34 is shaken, the synchronous motion of each set of hydraulic lifting device is ensured as much as possible, and the operation is stopped when the lifted equipment reaches a specified height; at the moment, the reversing valve 36 is adjusted to be in a hovering state, hydraulic oil in the oil applying cavity is kept still, and at the moment, the device is kept in the hovering state;

thirdly, when the hydraulic lifting device is withdrawn, firstly, the manual reversing valve 36 is turned to a descending state position, each operator simultaneously shakes the hand pump rocker 34, at the moment, the hydraulic oil in the upper oil cavity returns to the oil tank 33 through the one-way balance valve 32 and the reversing valve 36, and at the moment, the oil cylinder body 311 and the claw type support bracket 12 fixed with the oil cylinder body can descend until the lifting device recovers the initial height;

fourthly, when the hand-operated reversing valve 36 is turned to the middle position after the hand-operated reversing valve is removed, and the hand-operated pump rocker 34 is detached and fixed on the cylinder body 311; the lifting device is inclined backwards by holding the moving handle 22, and the device is pushed or pulled to move after the roller 21 is contacted with the ground.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the base is provided with the roller, and the cylinder body is provided with the movable handle, so that the lifting device can be more flexibly and conveniently retracted and transported; at the same time, the claw type supporting bracket in the device can be replaced to adapt to different types of equipment.

2. According to the invention, the size visual measuring mechanism is arranged on the cylinder body and is used for measuring the height of the lifting device, so that an operator can conveniently observe the state of the lifted equipment when operating the lifting device, and compared with electronic measuring equipment, the size visual measuring mechanism is simple to operate and has higher reliability.

3. The one-way balance valve is arranged in the oil way system, so that the influence of the middle pipeline on the oil cylinder is reduced, and the lifting device can move more stably.

4. The reversing valve is arranged in the oil circuit system, the motion state of the lifting device can be controlled through manual operation, particularly the descending process of the lifting device is controllable, and the damage to the equipment or the lifting device caused by overlarge impact when the equipment descends by depending on the gravity of the equipment is avoided.

5. The hydraulic lifting devices can work independently, and a combined hydraulic lifting system can be formed by configuring a corresponding number of lifting devices according to task conditions, so that the hydraulic lifting device is suitable for lifting operation of various types of equipment.

6. The hydraulic lifting equipment has long stroke which can reach 900mm at most, and can meet the lifting requirements of different heights of the equipment.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a general schematic view of a hydraulic lifting device provided by the present invention;

FIG. 2 is a schematic structural diagram of a hydraulic lifting device provided in the present invention;

FIG. 3 is a cross-sectional view of a hydraulic lift apparatus provided by the present invention;

in the figure:

1-support mechanism 21-roller 36-manual reversing valve

2-moving mechanism 22-moving handle 37-oil pipe

3-oil-way system 31-oil cylinder 41-size visual measuring mechanism

4-lifting height measuring device 32-one-way balance valve 311-oil cylinder body

11-base 33-hand pump rocker 312-piston

12-middle support rod 34-hand pump 313-lower sealing ring

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

The hydraulic lifting device with the adjustable height within the wide range comprises a supporting mechanism 1, a moving mechanism 2, an oil way system 3 and a lifting height measuring device 4.

The moving mechanism 2 and the measuring device 4 are both arranged on the supporting mechanism 1; the oil way system 3 is connected with the supporting mechanism 1; the supporting mechanism 1 is a main body structure of the hydraulic lifting device and is used for installing the moving mechanism 2, the oil circuit system 3 and the measuring device 4; the moving mechanism 2 is used for transferring the lifting device, and the moving mechanism 2 is divided into two parts which are respectively fixed on the supporting mechanism 1 and the oil circuit system 3; the oil way system 3 is used for storing and conveying hydraulic oil and is arranged on the supporting mechanism 1; the measuring device 4 is used for visualizing the position of the lifting device, and measuring and calibrating devices of the measuring device are respectively arranged on the supporting mechanism 1 and the oil circuit system 3.

According to one embodiment of the present invention, the support mechanism 1 includes a base 11 and an intermediate support bar 12;

the base 11 is used for supporting the whole hydraulic lifting device, and the middle supporting rod 12 is installed on the base 11 and used for supporting the oil circuit system 3 and the measuring device 4.

According to one embodiment of the present invention, the moving mechanism 2 includes a roller 21 and a moving handle 22;

the roller 21 is installed on the base 11, the moving handle 22 is installed on the oil cylinder body 311 of the oil circuit system 3, and the roller 21 and the moving handle 22 are matched for use, so that the lifting device is convenient to transfer.

According to one embodiment of the invention, the oil circuit system comprises an oil cylinder 31, a one-way balance valve 32, an oil tank 33, a hand pump rocker 34, a hand pump 35, a manual reversing valve 36 and an oil pipe 37;

the oil cylinder comprises an oil cylinder body 311, a piston 312 and a claw type lifting bracket 314 arranged on the oil cylinder body, the lower end of the piston 312 is connected with the base 11, the upper end of the piston 312 is matched with the inner wall of the oil cylinder body 311, the lower end of the piston 312 is connected with the oil cylinder body 311 through a lower sealing ring 313, and the oil cylinder body 311 does linear reciprocating motion relative to the piston 312;

the one-way balance valve 32, the oil tank 33, the hand pump 35 and the manual reversing valve 36 are all arranged on the cylinder body 311 and can move along with the cylinder body 311;

the oil pipe 37 is used for connecting the oil tank 33, the oil cylinder 31, the hand pump 35 and the one-way balance valve 32 and is used as a hydraulic oil transmission pipeline.

The oil tank 33, the one-way balance valve 32, the manual reversing valve 36 and the hand pump 35 are all fixed on the oil tank cylinder body 311, and two oil pipes are connected between the oil tank 33 and the hand pump 35 and used for conveying or recycling hydraulic oil; two oil pipes are connected between the hand pump 35 and the one-way balance valve 32 and are used for conveying or recovering hydraulic oil; the one-way balance valve 32 is connected with the cylinder body 311 through two oil pipes and is used for conveying or recycling hydraulic oil;

according to one embodiment of the invention, the support bracket 12 can be replaced to accommodate different types of equipment.

According to an embodiment of the present invention, the hand pump rocker 34 and the hand pump 35 can be separated, and the hand pump rocker 34 is detached and fixed to the cylinder body 311 when the lifting device does not need to be operated, so that the lifting device is compact in overall structure and convenient to store and transport.

According to one embodiment of the invention, the lifting height measuring device 4 comprises a dimension visualization measuring mechanism 41;

the size visual measuring mechanism 41 is installed on the cylinder body 311 and used for observing the lifting height of the hydraulic lifting device.

According to one embodiment of the invention, the number of requirements for the combined use of the wide-range height-adjustable hydraulic lifting devices is calculated according to the load type, and each set of hydraulic lifting devices is operated by one person.

The invention also provides a control method of the hydraulic lifting device with the adjustable height in the wide range, which is characterized by comprising the following steps;

firstly, respectively connecting at least one set of hydraulic lifting device with adjustable height within a wide range with lifted equipment; turning the handle of the manual reversing valve 36 of the oil way system 3 to a lifting state position;

secondly, an operator uses a manual pump rocker 34 equipped for each set of hydraulic lifting device to shake a hand pump 35, at the moment, hydraulic oil in an oil tank 33 reaches an upper oil cavity of an oil cylinder body 311 through a reversing valve 36 and a one-way balance valve 32, the oil cylinder body 311 is slowly lifted under the action of the hydraulic oil along with the continuous increase of the hydraulic oil in the upper oil cavity, and then a claw type support bracket 12 fixed with the oil cylinder body and lifted equipment connected with the oil cylinder body are driven to ascend, the steel tape 41 scribed lines on the lifting device and the lifting conditions of the lifted equipment are observed while the hand pump rocker 34 is shaken, the synchronous motion of each set of hydraulic lifting device is ensured as much as possible, and the operation is stopped when the lifted equipment reaches a specified height; at the moment, the reversing valve 36 is adjusted to be in a hovering state, hydraulic oil in the oil applying cavity is kept still, and at the moment, the device is kept in the hovering state;

thirdly, when the hydraulic lifting device is withdrawn, firstly, the manual reversing valve 36 is turned to a descending state position, each operator simultaneously shakes the hand pump rocker 34, at the moment, the hydraulic oil in the upper oil cavity returns to the oil tank 33 through the one-way balance valve 32 and the reversing valve 36, and at the moment, the oil cylinder body 311 and the claw type support bracket 12 fixed with the oil cylinder body can descend until the lifting device recovers the initial height;

fourthly, when the hand-operated reversing valve 36 is turned to the middle position after the hand-operated reversing valve is removed, and the hand-operated pump rocker 34 is detached and fixed on the cylinder body 311; the lifting device is inclined backwards by holding the moving handle 22, and the device is pushed or pulled to move after the roller 21 is contacted with the ground.

In summary, the present invention provides a hydraulic lifting device with a wide height range, which includes a supporting mechanism, an oil system, a moving mechanism and a lifting height measuring device. The moving mechanism and the measuring device are both arranged on the supporting mechanism; the oil circuit system is connected with the supporting mechanism. The support mechanism includes a base and a support bracket. The oil circuit system comprises an oil cylinder, a one-way balance valve, an oil tank, a hand-operated pump rocker, a hand-operated pump, a manual reversing valve and an oil pipe; the oil cylinder comprises an oil cylinder body and a piston, the lower end of the piston is connected with the base, the upper end of the piston is matched with the inner wall of the oil cylinder body, the lower end of the piston is connected with the oil cylinder body through a lower sealing ring, and the oil cylinder body makes linear reciprocating motion relative to the piston; the one-way balance valve, the oil tank, the hand-operated pump rocker, the hand-operated pump and the manual reversing valve are all arranged on the cylinder body of the oil cylinder and can move along with the oil cylinder; the rocker of the hand pump is separable from the hand pump and is fixed on the cylinder body of the oil cylinder when not in use; the oil pipe is used for connecting the oil tank, the oil cylinder, the hand pump and the one-way balance valve. The moving mechanism comprises a roller and a moving handle, the roller is installed on the base, and the moving handle is installed on the cylinder body of the oil cylinder, so that the lifting device is convenient to move. The lifting height measuring device is a size visual measuring mechanism and is used for measuring the lifting height of the lifting device. The hydraulic lifting device can realize the conversion of the movement direction of the oil cylinder through the manual reversing valve, has large lifting stroke and can be adjusted at any time according to the use working condition; meanwhile, the device is lifted by utilizing the hand pump, has no electrical requirements on working occasions, and is suitable for various working occasions.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.