An integral hoisting device and method for a cylinder piston rod

Abstract

The present invention discloses an integral hoisting device for a cylinder piston rod, wherein the cylinder and the piston rod are both in a state of being independently hoisted and transported, and the hoisting device comprises a first component, a second component and a dam gantry, wherein the cylinder is sleeved outside the piston rod, the bottom of the piston rod is fixed and supported at the bottom of the cylinder by the first component, and is used to limit the piston rod from moving downward and rotating circumferentially relative to the cylinder, and the top of the piston rod is fixed and supported at the top of the cylinder by the second component, and is used to limit the piston rod from moving downward and rotating circumferentially relative to the cylinder, so that the cylinder and the piston rod form a whole, and the dam gantry is hoisted and connected to the top of the cylinder, and when the dam gantry lifts the cylinder and moves it upward, the piston rod moves upward synchronously with the cylinder under the joint action of the first component and the second component. The present invention is not only highly safe, but also has a short hoisting and transporting time.

Description

Technical Field

[0001] The invention relates to a lifting device and a lifting method, in particular to an oil cylinder piston rod integral lifting device and an integral lifting method. Background Art

[0002] The water inlet of the Gongzui Hydropower Station unit is overhauled every four years, which requires the hydraulic gate hoist to be disassembled and then the cylinder and piston rod to be repaired. Before the repair, the cylinder and piston rod need to be moved to the repair area by hoisting. The traditional hoisting method is usually to separate and hoist in steps, and the steps are:

[0003] 1. Drain the hydraulic oil in the oil cylinder;

[0004] 2. Use a 32t dam gantry crane to lift the oil cylinder;

[0005] 3. Use a 32t dam gantry crane to lift the piston rod.

[0006] However, in actual lifting, lifting the oil cylinder and the piston rod in this lifting manner causes operators to waste time and effort, increase the number of lifting operations, and are accompanied by risks brought about by the lifting operations. Summary of the invention

[0007] The purpose of the invention is to provide an integral hoisting device and method for a cylinder piston rod, which are not only highly safe but also have a short hoisting and handling time, in view of the above-mentioned deficiencies in the prior art.

[0008] The technical solution adopted by the invention is a cylinder piston rod integral lifting device, wherein the cylinder and the piston rod are both in a state where they can be independently lifted and transported, and the lifting device comprises a first component, a second component and a dam gantry crane, wherein the cylinder is sleeved on the outside of the piston rod, and the bottom of the piston rod is fixed and supported on the bottom of the cylinder by the first component, so as to limit the downward movement and circumferential rotation of the piston rod relative to the cylinder, and the top of the piston rod is fixed and supported on the top of the cylinder by the second component, so as to limit the downward movement and circumferential rotation of the piston rod relative to the cylinder, so that the cylinder and the piston rod form a whole, and the dam gantry crane is hoisted and connected to the top of the cylinder, and when the dam gantry crane lifts the cylinder and moves it upward, the piston rod moves upward synchronously with the cylinder under the joint action of the first component and the second component.

[0009] The dam gantry crane uses an 85t auxiliary hook to be hoisted and connected to the top of the cylinder.

[0010] The first component is mainly composed of a half-type locking nut, a first threaded fastener, a wire rope, an upper anti-rotation seat, a lower anti-rotation seat, an anti-rotation column and a locking nut. Two lower hanging ears symmetrical to each other are arranged on the outer peripheral wall surface of the bottom of the oil cylinder. The bottom of the piston rod extends out of the lower end port of the oil cylinder, and an external thread is arranged on the outer peripheral wall surface of the bottom. The half-type locking nut is composed of two semicircular nuts symmetrical to each other, one end of one semicircular nut is hingedly connected to one end of the other semicircular nut, and the other end of one semicircular nut and the other end of the other semicircular nut are both provided with a first connecting ear, and these two first connecting ears are provided with through threaded holes. The half-type locking nut is sleeved on the external thread at the bottom of the piston rod, and the first threaded fastener passes through the threaded hole on the first connecting ear of one semicircular nut, the threaded hole on the other semicircular nut in turn. The threaded hole of the first connecting ear of the petal semicircular nut is adjusted to make the half-type locking nut threaded and fastened to the external thread at the bottom of the piston rod. There are multiple steel wire ropes, and both ends of each steel wire rope are set as closed rope loops. The rope loops at both ends of each steel wire rope correspond to the hanging loops on the lower hanging ears at the bottom of the oil cylinder and the piston rod part below the half-type locking nut. When the top of the piston rod is fixed and supported on the top of the oil cylinder by the first component to limit the downward movement of the piston rod relative to the oil cylinder, these steel wire ropes are in a taut state, thereby limiting the downward movement of the piston rod relative to the oil cylinder; there are two upper anti-rotation seats, which are symmetrically arranged on the outer peripheral wall surface of the bottom of the oil cylinder, and the two upper anti-rotation seats are vertically opened with first through holes.

[0011] There are two lower anti-rotation seats, which are symmetrically arranged on the outer peripheral wall of the half-type locking nut. One lower anti-rotation seat is arranged on the outer peripheral wall of one semicircular nut, and the other lower anti-rotation seat is arranged on the outer peripheral wall of the other semicircular nut. The two lower anti-rotation seats are vertically provided with a second through hole. There are two anti-rotation columns, each of which is divided into an upper and a lower section. The outer diameter of the upper anti-rotation column is equal to the outer diameter of the lower anti-rotation column, and the outer diameter of the upper anti-rotation column is equal to the inner diameter of the first through hole. The outer peripheral wall of the lower anti-rotation column is provided with an external thread, and the maximum outer diameter of the lower anti-rotation column is equal to the inner diameter of the second The inner diameter of the through hole, there are two locking nuts, which can be screwed onto the external thread of the lower anti-rotation column, and the anti-rotation column passes through the first through hole from top to bottom. Before the anti-rotation column enters the second through hole, a locking nut is screwed onto the external thread of the anti-rotation column. After the anti-rotation column passes through the second through hole, another locking nut is screwed onto the external thread of the anti-rotation column. Screwing the two locking nuts can make the two locking nuts clamp the lower anti-rotation seat, so that the anti-rotation column limits the upper anti-rotation seat and the lower anti-rotation seat from rotating relative to each other, thereby limiting the circumferential rotation of the piston rod relative to the cylinder.

[0012] The second component is mainly composed of a bar square steel, an anti-rotation ring, a second threaded fastener and a third threaded fastener. Two upper lifting ears symmetrical to each other are arranged on the outer peripheral wall surface of the top of the oil cylinder. The top of the piston rod extends out of the upper end port of the oil cylinder, and there is a lifting ring above the top. The two bar square steels are long and have a square cross-section. The two bar square steels are arranged in parallel and cooperate with each other to clamp the part between the top of the piston rod and the lifting ring at the top of the piston rod. The two bar square steels are located on the top of the oil cylinder, and the weight of the piston rod is transferred to the top of the oil cylinder through the two bar square steels to support and bear, thereby limiting the downward movement of the piston rod relative to the oil cylinder. The two end portions of one bar square steel extend horizontally out of the top surface of the oil cylinder, and the two end portions of the other bar square steel extend horizontally out of the top surface of the oil cylinder. One end of a bar square steel and one end of another bar square steel are both provided with bending parts bending toward each other, the other end of a bar square steel and another bar square steel of another bar square steel are both provided with bending parts bending toward each other, and the four bending parts are vertically provided with a first threaded hole, the anti-rotation ring is a circular ring composed of two semicircular rings, one end of the anti-rotation ring of one semicircular ring and one end of the anti-rotation ring of the other semicircular ring are hingedly connected to each other, the other end of the anti-rotation ring of one semicircular ring and the other end of the anti-rotation ring of the other semicircular ring are both provided with a second connecting ear, four through-going second threaded holes corresponding to the first threaded holes are provided on the annular upper surface of the anti-rotation ring, and two corresponding to and matching with the upper lifting ears of the oil cylinder are provided on the annular outer peripheral wall surface of the anti-rotation ring. The cam is provided with a plurality of stoppers, each of which is provided with a plurality of stoppers, and the plurality of stoppers are provided with a plurality of stoppers. The plurality of stoppers are provided with a plurality of stoppers, each of which is provided with a plurality of stoppers. The plurality of stoppers are provided with a plurality of stoppers, each of which is provided with a plurality of stoppers.

[0013] Furthermore, the second component further comprises a connecting member, a first magnet and a second magnet. The connecting members are two, arranged in parallel and matched with each other. The connecting rod is in a "П" shape and consists of a crossbar, a vertical rod and a guide block. The crossbar is provided with a first magnet. The two ends of the crossbar are respectively fixedly connected to one of the vertical rods. A guide block is respectively provided on the inner sides of the two vertical rods facing each other. A horizontally arranged guide groove matching the guide block is respectively arranged on the outer sides of the two strip square steels facing away from each other, and two notches matching the guide block are opened on the lower inner wall of each guide groove. The two connecting parts are respectively installed from the two ends of the two strip square steels as a whole, so that the guide blocks at both ends of each connecting part are slid and inserted into the corresponding guide groove respectively, until the guide blocks at both ends of each connecting part fall into the corresponding notches respectively. At the same time, the cross bars of the connecting parts are respectively attached to the top surfaces of the two strip square steels, and the first magnets on the cross bars of the connecting parts are respectively attracted by the second magnets correspondingly arranged on the top surfaces of the strip square steels, so that the two connecting parts are located on both sides of the top lifting ring of the piston rod.

[0014] A method for hoisting a cylinder piston rod as a whole, using a first component, a second component and a dam gantry crane to realize the whole hoisting, the steps of the hoisting method are:

[0015] (1) Drain the hydraulic oil in the oil cylinder and keep the oil cylinder and the piston rod in a state where they can be independently hoisted and transported. At the same time, use the dam gantry crane to hoist the piston rod and limit the downward movement of the piston rod relative to the oil cylinder;

[0016] (2) installing the first component on the top of the oil cylinder and the top of the piston rod respectively, so that the top of the oil cylinder and the top of the piston rod form a whole;

[0017] (3) installing the second component on the top of the oil cylinder and the top of the piston rod respectively, so that the top of the oil cylinder and the top of the piston rod form a whole;

[0018] (4) dismantling the lifting connection between the dam gantry crane and the piston rod;

[0019] (5) hoisting and connecting the dam gantry crane to the top of the oil cylinder;

[0020] (6) The dam gantry crane lifts the oil cylinder and moves it upward. Under the joint action of the first component and the second component, the piston rod moves upward synchronously with the oil cylinder, thereby realizing the overall lifting process of the oil cylinder and the piston rod.

[0021] In step (1), the dam gantry crane adopts an 85t auxiliary hook and a 30t sling with a length of 10m. One end of the sling is connected to the auxiliary hook of the dam gantry crane, and the other end is connected to the lifting ring of the piston rod.

[0022] In step (2), two symmetrical lower lifting ears are arranged on the outer peripheral wall surface of the bottom of the oil cylinder, and the outer peripheral wall surface of the bottom of the piston rod has an external thread. The first component is mainly composed of a half-type locking nut, a first threaded fastener, a wire rope, an upper anti-rotation seat, a lower anti-rotation seat, an anti-rotation column and a locking nut. The upper anti-rotation seats are two and are symmetrically arranged on the outer peripheral wall surface of the bottom of the oil cylinder. The two upper anti-rotation seats are vertically provided with a first through hole. The lower anti-rotation seats are two and are symmetrically arranged on the outer peripheral wall surface of the half-type locking nut. One lower anti-rotation seat is arranged on the outer peripheral wall surface of one semicircular nut, and the other lower anti-rotation seat is arranged on the outer peripheral wall surface of the other semicircular nut. The two lower anti-rotation seats are vertically provided with a second through hole. In order to install the first component on the bottom of the oil cylinder and the bottom of the piston rod respectively, the steps are:

[0023] (I) Sleeving the half locking nut onto the external thread at the bottom of the piston rod and locking it with a first threaded fastener;

[0024] (II) There are multiple steel wire ropes, and the two ends of each steel wire rope are hung on the lower lifting ears at the bottom of the oil cylinder and the piston rod part of the piston rod is located below the half-type locking nut;

[0025] (III) The anti-rotation column is passed through the first through hole from top to bottom, and then before the anti-rotation column enters the second through hole, a locking nut is screwed onto the external thread of the anti-rotation column, and then after the anti-rotation column passes through the second through hole, another locking nut is screwed onto the external thread of the anti-rotation column, and finally the two locking nuts are screwed so that the two locking nuts can clamp the lower anti-rotation seat.

[0026] In step (3), two upper lifting ears symmetrical to each other are arranged on the outer peripheral wall surface of the top of the oil cylinder, and a lifting ring is arranged above the top of the piston rod. The second component mainly consists of a bar square steel, an anti-rotation ring, a second threaded fastener and a third threaded fastener. The bar square steel is two, and one end of one bar square steel and one end of the other bar square steel are both provided with bending portions bent toward each other, and the other end of one bar square steel and the other bar square steel of the other bar square steel are both provided with bending portions bent toward each other, and the four bending portions are all vertically provided with a first threaded hole, and the anti-rotation ring consists of two semicircular rings. The anti-rotation ring is in the shape of a ring, one end of the anti-rotation ring of a semicircular ring is hingedly connected to one end of the anti-rotation ring of the other semicircular ring, and the other end of the anti-rotation ring of the semicircular ring and the other end of the anti-rotation ring of the other semicircular ring are both provided with a second connecting ear, and the annular upper surface of the anti-rotation ring is provided with four through second threaded holes corresponding to the first threaded holes, and the annular outer peripheral wall surface of the anti-rotation ring is provided with two limiting notches corresponding to and matching the upper lifting ears of the oil cylinder, and the edges of the two limiting notches are downward, in order to respectively install the second component on the top of the oil cylinder and the top of the piston rod, the steps are:

[0027] (α) clamping the two square steel bars between the top of the piston rod and the lifting ring at the top of the piston rod, and placing the two square steel bars on the top surface of the oil cylinder;

[0028] (β) First, the anti-rotation ring is put on the edges around the top of the oil cylinder, and then the second threaded fastener is passed through the second connecting ear at the other end of one semicircular anti-rotation ring and the second connecting ear at the other end of the other semicircular anti-rotation ring in sequence, and fixed and locked so that each first threaded hole corresponds to a second threaded hole, and each limiting notch is stuck on the outside of a corresponding upper lifting ear;

[0029] (γ) Screw the third threaded fastener into a corresponding first threaded hole from top to bottom, and then continue to screw it downward into the second threaded hole corresponding to the first threaded hole.

[0030] In step (5), two upper lifting ears symmetrical to each other are arranged on the outer peripheral wall surface of the top of the oil cylinder. The dam gantry crane adopts an 85t auxiliary hook and a 30t sling with a length of 10m. One end of the sling is connected to the auxiliary hook of the dam gantry crane, and the other end is connected to the upper lifting ear of the oil cylinder.

[0031] The beneficial effects of the invention are: the present invention is not only highly safe, but also has a short hoisting and handling time. Specifically, firstly, the present invention realizes the overall cooperation of the oil cylinder and the piston rod for the first time through the first component, and realizes the overall cooperation of the oil cylinder and the piston rod for the second time through the second component, so that the overall cooperation is more reasonable and safe; secondly, the first component cooperates with the second component for the third time to limit the downward movement of the piston rod relative to the oil cylinder from the upper and lower positions, and the first component cooperates with the second component for the fourth time to limit the circumferential rotation of the piston rod relative to the oil cylinder from the upper and lower positions; thirdly, the traditional separate and step-by-step hoisting method is adopted to separate and step-by-step hoisting of the oil cylinder and the piston rod, which takes 1.5 days and 10 operators are equipped. The hoisting device and hoisting method of the present invention are adopted to hoist the oil cylinder and the piston rod as a whole, which takes 0.5 days and 5 operators are equipped. Thus, "triple insurance" is achieved during the hoisting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 Schematic diagram of the oil cylinder piston rod in Example 1.

[0034] Figure 2 yes Figure 1 Top view of .

[0035] The meaning of the codes in the figure are as follows: 1—oil cylinder; 101—upper lifting ear; 102—lower lifting ear; 2—piston rod; 201—lifting ring; 3—first component; 301—half-type locking nut; 302—wire rope; 303—upper anti-rotation seat; 304—lower anti-rotation seat; 305—anti-rotation column; 306—locking nut; 4—second component; 401—bar square steel; 402—anti-rotation ring; 403—second threaded fastener; 404—third threaded fastener. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] It should also be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0042] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] Example 1

[0044] See also Figure 1 , Figure 2As shown: the present invention is an integral lifting device for a cylinder piston rod, wherein the cylinder 1 and the piston rod 2 are both in a state where they can be independently lifted and transported. Specifically, the cylinder piston rod 2 is decomposed into two cylinders 1 and piston rods 2 that can be lifted separately. At the same time, the connection between the cylinder 1 and the piston rod 2 and the hydraulic gate opening machine of the Gongzui Hydropower Station unit is released (dismantled) to avoid the cylinder 1 and the piston rod 2 being unable to be lifted out of the door slot of the Gongzui Hydropower Station unit during the lifting process.

[0045] The hoisting device comprises a first component 3, a second component 4 and a dam gantry crane.

[0046] The oil cylinder 1 is sleeved on the outside of the piston rod 2, providing a basis for the subsequent fixing and lifting of the oil cylinder 1 and the piston rod 2. At this time, the piston rod 2 can pass through the upper and lower end ports of the oil cylinder 1, and the traditional lifting method can adopt a separate and step-by-step lifting method to gradually tie the oil cylinder 1 and the piston rod 2.

[0047] The bottom of the piston rod 2 is fixed and supported at the bottom of the oil cylinder 1 through the first component 3, so as to limit the downward movement and circumferential rotation of the piston rod 2 relative to the oil cylinder 1.

[0048] Furthermore, the top of the piston rod 2 is fixed and supported on the top of the oil cylinder 1 through the second component 4, which is used to limit the downward movement and circumferential rotation of the piston rod 2 relative to the oil cylinder 1, so that the oil cylinder 1 and the piston rod 2 form a whole.

[0049] The dam gantry crane is hoisted and connected to the top of the oil cylinder 1.

[0050] When the dam gantry crane lifts the oil cylinder 1 and moves it upward, the piston rod 2 moves upward synchronously with the oil cylinder 1 under the joint action of the first component 3 and the second component 4.

[0051] This embodiment is not only highly safe, but also has a short hoisting and handling time. Specifically, firstly, the present invention realizes the first overall cooperation of the oil cylinder 1 and the piston rod 2 through the first component 3, and realizes the second overall cooperation of the oil cylinder 1 and the piston rod 2 through the second component 4, so that the overall cooperation is more reasonable and safe; secondly, the first component 3 and the second component 4 cooperate for the third time to limit the downward movement of the piston rod 2 relative to the oil cylinder 1 from the upper and lower positions, and the first component 3 and the second component 4 cooperate for the fourth time to limit the circumferential rotation of the piston rod 2 relative to the oil cylinder 1 from the upper and lower positions; thirdly, the traditional separate and step-by-step hoisting method is adopted to separate and step-by-step hoisting of the oil cylinder 1 and the piston rod 2, which takes 1.5 days and 10 operators are equipped. The hoisting device and hoisting method of the present invention are adopted to hoist the oil cylinder 1 and the piston rod 2 as a whole, which takes 0.5 days and 5 operators are equipped. Thus, "triple insurance" is achieved during the hoisting process.

[0052] Furthermore, the dam gantry crane uses an 85t auxiliary hook to be hoisted and connected to the top of the oil cylinder 1. In this embodiment, the auxiliary hook is connected to the upper lifting lug 101 provided on the outer peripheral wall of the top of the oil cylinder 1 through a lifting belt (the upper lifting lug 101 is a pair, symmetrically provided on the opposite sides of the oil cylinder 1, and the connecting line thereof coincides with the diameter of the oil cylinder 1). The weight of the piston rod 2 of the entire oil cylinder 1 is about 30t, which is fully capable of ensuring stable and safe hoisting.

[0053] Specifically, the first component 3 is mainly composed of a half-type locking nut 301 , a first threaded fastener, a steel wire rope 302 , an upper anti-rotation seat 303 , a lower anti-rotation seat 304 , an anti-rotation column 305 and a locking nut 306 .

[0054] Two symmetrical lower hanging ears 102 are arranged on the outer peripheral wall surface of the bottom of the oil cylinder 1. In this embodiment, the lower hanging ears 102 are arranged on the outer peripheral wall surface of the bottom of the oil cylinder 1 by welding. Furthermore, the two lower hanging ears 102 are located in the plane where the two upper hanging ears 101 are located. The lower hanging ear 102 is a solid cylinder, and a brim is arranged at one end away from the oil cylinder 1 to prevent the lower hanging ear 102 from sliding off the end after the wire rope 302 is hung on it. The diameter of the cylinder is 300-400 mm (for example, 300 mm, 350 mm, 370 mm or 40 mm), and the diameter of the brim is 450-550 mm (for example, 450 mm, 480 mm, 500 mm or 550 mm).

[0055] The bottom of the piston rod 2 extends out of the lower end port of the oil cylinder 1, and the outer peripheral wall surface of the bottom is provided with an external thread.

[0056] The split-half locking nut 301 is composed of two symmetrical semicircular nuts, one end of one semicircular nut is hingedly connected to one end of the other semicircular nut, and the other end of one semicircular nut and the other end of the other semicircular nut are both provided with first connecting ears, and the two first connecting ears are provided with through threaded holes.

[0057] The split-half locking nut 301 is sleeved on the external thread at the bottom of the piston rod 2. Specifically, the split-half locking nut 301 is separated and sleeved on the external thread at the bottom of the piston rod 2, and then the split-half locking nut 301 is closed, and the first threaded fastener is passed through the threaded hole on the first connecting ear of one semicircular nut and the threaded hole of the first connecting ear of the other semicircular nut in sequence, and the first threaded fastener is adjusted so that the split-half locking nut 301 is threaded and fastened on the external thread at the bottom of the piston rod 2. The subsequent steel wire rope 302 can be hung on the external thread of the piston rod 2 to prepare a fulcrum position.

[0058] There are multiple steel wire ropes 302, and both ends of each steel wire rope 302 are set as closed rope loops. When there is no force, the two ends of the steel wire rope 302 are similar to the shape of "0". The rope loops at both ends of each steel wire rope 302 correspond to the hanging loops on the lower lifting ears 102 at the bottom of the oil cylinder 1 and the piston rod part of the piston rod 2 located below the half-type locking nut 301. When the top of the piston rod 2 is fixed and supported on the top of the oil cylinder 1 by the first component 3 to limit the downward movement of the piston rod 2 relative to the oil cylinder 1, these steel wire ropes 302 are in a taut state, thereby limiting the downward movement of the piston rod 2 relative to the oil cylinder 1;

[0059] There are two upper anti-rotation seats 303, which are symmetrically arranged on (welded to) the outer peripheral wall surface of the bottom of the cylinder 1, and the two upper anti-rotation seats 303 are vertically opened with a first through hole. There are two lower anti-rotation seats 304, which are symmetrically arranged on (welded to) the outer peripheral wall surface of the half-type locking nut 301, one lower anti-rotation seat 304 is arranged on the outer peripheral wall surface of one semicircular nut, and the other lower anti-rotation seat 304 is arranged on the outer peripheral wall surface of the other semicircular nut, and the two lower anti-rotation seats 304 are vertically opened with a second through hole.

[0060] There are two anti-rotation columns 305, each of which is divided into an upper and a lower section. The outer diameter of the upper anti-rotation column is equal to the outer diameter of the lower anti-rotation column, and the outer diameter of the upper anti-rotation column is equal to the inner diameter of the first through hole. An external thread is provided on the outer peripheral wall of the lower anti-rotation column, and the maximum outer diameter of the lower anti-rotation column is equal to the inner diameter of the second through hole. There are two locking nuts 306, which can be screwed onto the external thread of the lower anti-rotation column.

[0061] The anti-rotation column 305 passes through the first through hole from top to bottom. Before the anti-rotation column 305 enters the second through hole, a locking nut 306 is screwed onto the external thread of the anti-rotation column 305. After the anti-rotation column 305 passes through the second through hole (rotate in the circumferential direction in advance, adjust the half-type locking nut 301, adjust to the vertical alignment of the first through hole and the second through hole, and fix the half-type locking nut 301 on the external thread at the bottom of the piston rod 2), another locking nut 306 is screwed onto the external thread of the anti-rotation column 305. Screwing these two locking nuts 306 can make these two locking nuts 306 clamp the lower anti-rotation seat 304, so that the anti-rotation column 305 limits the rotation of the upper anti-rotation seat 303 and the lower anti-rotation seat 304 relative to each other, thereby limiting the circumferential rotation of the piston rod 2 relative to the cylinder 1.

[0062] The second component 4 is mainly composed of a bar-shaped square steel 401 , an anti-rotation ring 402 , a second threaded fastener 403 and a third threaded fastener 404 .

[0063] Two symmetrical upper lifting ears 101 are arranged on the outer peripheral wall surface of the top of the oil cylinder 1 (welded, or integrally formed), the top of the piston rod 2 extends out of the upper end port of the oil cylinder 1, and a lifting ring 201 is provided above the top (a connecting rod is vertically arranged on the top of the piston rod 2, which is fixedly connected to the bottom of the connecting rod [welded, or integrally formed], and the top of the connecting rod is fixedly connected to the lifting ring 201 [welded, or integrally formed]).

[0064] There are two strips of square steel 401, which are in the shape of long strips and have a square cross section. The two strips of square steel 401 are arranged in parallel and cooperate with each other, and are clamped between the top of the piston rod 2 and the lifting ring 201 at the top of the piston rod 2 (i.e., clamped on the connecting rod between the top of the piston rod 2 and the lifting ring 201). The two strips of square steel 401 are located on the top of the oil cylinder 1 (i.e., the bottom surfaces of the two strips of square steel 401 are in contact with the top surface of the oil cylinder 1), and the weight of the piston rod 2 is transferred to the top of the oil cylinder 1 through the two strips of square steel 401 to support and bear, thereby limiting the downward movement of the piston rod 2 relative to the oil cylinder 1.

[0065] The two ends of one bar-shaped square steel 401 extend horizontally out of the top surface of the oil cylinder 1, and the two ends of another bar-shaped square steel 401 extend horizontally out of the top surface of the oil cylinder 1.

[0066] One end of one bar square steel 401 and one end of another bar square steel 401 are both provided with bending portions bent toward each other, the other end of one bar square steel 401 and another bar square steel 401 are both provided with bending portions bent toward each other, and the four bending portions are all vertically provided with first threaded holes.

[0067] The anti-rotation ring 402 is in a circular shape consisting of two semicircular rings, one end of the anti-rotation ring 402 of one semicircular ring is hingedly connected to one end of the anti-rotation ring 402 of the other semicircular ring, and the other end of the anti-rotation ring 402 of one semicircular ring and the other end of the anti-rotation ring 402 of the other semicircular ring are both provided with a second connecting ear.

[0068] The annular upper surface of the anti-rotation ring 402 is provided with four through second threaded holes corresponding to the first threaded holes, and the annular outer peripheral wall surface of the anti-rotation ring 402 is provided with two limiting notches corresponding to and matching the upper lifting ears 101 of the oil cylinder 1, and the edges of the two limiting notches are downward, and the anti-rotation ring 402 is sleeved on the edges of the top of the oil cylinder 1. The second threaded fastener 403 passes through the second connecting ear at the other end of a semicircular anti-rotation ring 402 and the second connecting ear at the other end of the other semicircular anti-rotation ring 402 in sequence, and is fixed and locked. Make each first threaded hole correspond to a second threaded hole, and make each limiting notch stuck on the outside of a corresponding upper lifting ear 101. There are four third threaded fasteners 404, and each third threaded fastener 404 is screwed into a corresponding first threaded hole and a second threaded hole corresponding to the first threaded hole from top to bottom. On the one hand, it prevents the piston rod 2 from rotating circumferentially relative to the cylinder 1, and on the other hand, it fixes the two strips of square steel 401 to prevent them from moving relative to each other, ensuring that the two strips of square steel 401 can be stably clamped between the top of the piston rod 2 and the lifting ring 201.

[0069] When the bottom of the piston rod 2 is fixed and supported at the lower part of the cylinder 1 by the second component 4 to limit the downward movement of the piston rod 2 relative to the cylinder 1, the cylinder 1 supports the weight of the piston rod 2 through the two square steel bars 401.

[0070] In addition, the first threaded fastener, the second threaded fastener 403 and the third threaded fastener 404 are all bolts.

[0071] A method for hoisting a cylinder piston rod as a whole, using a first component 3, a second component 4 and a dam gantry crane to realize the whole hoisting, the steps of the hoisting method are:

[0072] (1) Drain the hydraulic oil in the oil cylinder 1, keep the oil cylinder 1 and the piston rod 2 in a state where they can be independently hoisted and transported, and at the same time, use the dam gantry crane to hoist the piston rod 2 to limit the downward movement of the piston rod 2 relative to the oil cylinder 1;

[0073] (2) Install the first component 3 on the top of the oil cylinder 1 and the top of the piston rod 2 respectively, so that the top of the oil cylinder 1 and the top of the piston rod 2 form a whole;

[0074] (3) Install the second component 4 on the top of the oil cylinder 1 and the top of the piston rod 2 respectively, so that the top of the oil cylinder 1 and the top of the piston rod 2 form a whole;

[0075] (4) Dismantling the lifting connection between the dam gantry crane and the piston rod 2;

[0076] (5) Connecting the dam gantry crane to the top of the oil cylinder 1;

[0077] (6) The dam gantry crane lifts the oil cylinder 1 and moves it upward. Under the joint action of the first component 3 and the second component 4, the piston rod 2 moves upward synchronously with the oil cylinder 1, thereby realizing the overall lifting process of the oil cylinder 1 and the piston rod 2.

[0078] In step (1), the dam gantry crane adopts an 85t auxiliary hook and a 30t sling with a length of 10m. One end of the sling is connected to the auxiliary hook of the dam gantry crane, and the other end is connected to the lifting ring 201 of the piston rod 2.

[0079] In step (2), two symmetrical lower lifting ears 102 are provided on the outer peripheral wall surface of the bottom of the oil cylinder 1, and the outer peripheral wall surface of the bottom of the piston rod 2 has an external thread.

[0080] The first component 3 is mainly composed of a half-type locking nut 301, a first threaded fastener, a wire rope 302, an upper anti-rotation seat 303, a lower anti-rotation seat 304, an anti-rotation column 305 and a locking nut 306.

[0081] There are two upper anti-rotation seats 303, which are symmetrically arranged on the outer peripheral wall surface of the bottom of the oil cylinder 1. The two upper anti-rotation seats 303 are vertically opened with a first through hole.

[0082] There are two lower anti-rotation seats 304, which are symmetrically arranged on the outer peripheral wall of the half-type locking nut 301. One lower anti-rotation seat 304 is arranged on the outer peripheral wall of one semicircular nut, and the other lower anti-rotation seat 304 is arranged on the outer peripheral wall of the other semicircular nut. The two lower anti-rotation seats 304 are vertically provided with second through holes.

[0083] In order to install the first component 3 at the bottom of the oil cylinder 1 and the bottom of the piston rod 2 respectively, the steps are:

[0084] (I) Sleeve the half locking nut onto the external thread at the bottom of the piston rod 2 and lock it with a first threaded fastener;

[0085] (II) There are multiple steel wire ropes 302 (in this embodiment, there are two steel wire ropes 302), and the two ends of each steel wire 302 are hung on the lower lifting ear 102 at the bottom of the oil cylinder 1 and the piston rod part of the piston rod 2 located below the half-type locking nut 301;

[0086] (III) Pass the anti-rotation column 305 through the first through hole from top to bottom, and then before the anti-rotation column 305 enters the second through hole, screw a locking nut 306 onto the external thread of the anti-rotation column 305, and then after the anti-rotation column 305 passes through the second through hole, screw another locking nut 306 onto the external thread of the anti-rotation column 305, and finally screw the two locking nuts 306 so that the two locking nuts 306 can clamp the lower anti-rotation seat 304.

[0087] Furthermore, the diameter of the steel wire rope 302 is 24-32 mm, and the length is 3-3.5 m.

[0088] In step (3), two upper lifting ears 101 symmetrical to each other are arranged on the outer peripheral wall surface of the top of the oil cylinder 1, and a lifting ring 201 is arranged above the top of the piston rod 2.

[0089] The second component 4 is mainly composed of a bar-shaped square steel 401, an anti-rotation ring 402, a second threaded fastener 403 and a third threaded fastener 404.

[0090] There are two bar-shaped square steels 401, one end of one bar-shaped square steel 401 and one end of the other bar-shaped square steel 401 are both provided with bending portions bending toward each other, the other end of one bar-shaped square steel 401 and another bar-shaped square steel 401 are both provided with bending portions bending toward each other, and the four bending portions are all vertically provided with first threaded holes.

[0091] The anti-rotation ring 402 is in a circular shape consisting of two semicircular rings, one end of the anti-rotation ring 402 of one semicircular ring is hingedly connected to one end of the anti-rotation ring 402 of the other semicircular ring, and the other end of the anti-rotation ring 402 of one semicircular ring and the other end of the anti-rotation ring 402 of the other semicircular ring are both provided with a second connecting ear, and the annular upper surface of the anti-rotation ring 402 is provided with four through second threaded holes corresponding to the first threaded holes, and the annular outer peripheral wall surface of the anti-rotation ring 402 is provided with two limiting notches corresponding to and matching the upper lifting ears 101 of the oil cylinder 1, and the edges of the two limiting notches are downward,

[0092] In order to install the second component 4 on the top of the oil cylinder 1 and the top of the piston rod 2 respectively, the steps are:

[0093] (α) clamping the two square steel bars 401 between the top of the piston rod 2 and the lifting ring 201 at the top of the piston rod 2, and placing the two square steel bars 401 on the top surface of the oil cylinder 1;

[0094] (β) First, the anti-rotation ring 402 is put on the edges around the top of the oil cylinder 1, and then the second threaded fastener 403 is passed through the second connecting ear at the other end of a semicircular anti-rotation ring 402 and the second connecting ear at the other end of the other semicircular anti-rotation ring 402 in sequence, and fixed and locked, so that each first threaded hole corresponds to a second threaded hole, and each limiting notch is stuck on the outside of a corresponding upper lifting ear 101;

[0095] (γ) Screw the third threaded fastener 404 into a corresponding first threaded hole from top to bottom, and then continue to screw it downward into the second threaded hole corresponding to the first threaded hole.

[0096] In step (5), two upper lifting ears 101 symmetrical to each other are provided on the outer peripheral wall surface of the top of the oil cylinder 1.

[0097] The dam gantry crane adopts an 85t auxiliary hook and a 30t sling with a length of 10m. One end of the sling is connected to the auxiliary hook of the dam gantry crane, and the other end is connected to the upper lifting ear 101 of the cylinder 1.

[0098] Example 2

[0099] The other structures of the present embodiment 2 are the same as those of the embodiment 1, except that:

[0100] The second component further includes a connecting member, a first magnet and a second magnet,

[0101] The connecting pieces are two, arranged in parallel and matched with each other.

[0102] The connecting rod is in the shape of "П", and is composed of a horizontal rod, a vertical rod and a guide block. The horizontal rod is provided with a first magnet. The two ends of the horizontal rod are respectively fixedly connected to one of the vertical rods. The inner sides of the two vertical rods facing each other are respectively provided with a guide block.

[0103] The two strip-shaped square steels are provided with a horizontally arranged guide groove matching the guide block on their outer sides facing away from each other, and two notches matching the guide block are provided on the lower inner wall of each guide groove.

[0104] The two connectors are respectively installed from the two ends of the two bars of square steel, so that the guide blocks at both ends of each connector are slid and inserted into the corresponding guide grooves, until the guide blocks at both ends of each connector fall into the corresponding notches. At the same time, the cross bars of the connectors are respectively attached to the top surfaces of the two bars of square steel, and the first magnets on the cross bars of the connectors are respectively attracted to the second magnets corresponding to the top surfaces of the bars of square steel, so that the two connectors are located on both sides of the top ring of the piston rod. On the one hand, it prevents the overall movement of the two bars of square steel, resulting in the part between the top of the piston rod and the ring being not in the middle of the two bars of square steel. On the other hand, it is convenient for operators to quickly locate the middle position of the two bars of square steel for clamping the part between the top of the piston rod and the ring.

[0105] Example 3

[0106] The other structures of this embodiment 3 are the same as those of the embodiments 1 or 2, except that: the hoisting device further includes a tightening assembly,

[0107] The tightening assembly is mainly composed of an outer cylinder, a push rod and a spring. The outer cylinder is a blind structure with one end open. One end of the push rod is placed in the outer cylinder. A spring is arranged between the end surface of the push rod placed in the outer cylinder and the inner bottom surface of the outer cylinder. One end of the spring is fixedly connected to the inner bottom surface of the outer cylinder, and the other end is fixedly connected to the end surface of the push rod placed in the outer cylinder. In addition, the outer circumferential wall surface of the push rod and the inner circumferential wall surface of the outer cylinder are provided with convex-concave matching guide structures.

[0108] The top of the mandrel and the edge of the outer tube are both provided with limiting convex edges to prevent the mandrel from slipping out of the inner tube. The bottom of the mandrel is provided with a ring for the wire rope to pass through, and the aperture of the ring is equal to 3 to 4 times the diameter of the wire rope.

[0109] The top of the outer cylinder is provided with an external thread, the half-type locking nut is provided with two symmetrical through holes, the diameters of the two through holes are equal to the outer diameter of the inner cylinder, the bottom surface of the oil cylinder is provided with two symmetrical blind holes, and the inner wall surface is provided with an internal thread matching the external thread on the top of the outer cylinder.

[0110] Before installation, adjust the half-type locking nut so that the first through hole is vertically aligned with the second through hole, and the blind hole on the bottom surface of the oil cylinder is vertically aligned with the through hole on the half-type locking nut.

[0111] During installation, the outer cylinder of the jacking assembly moves vertically upward from the through hole on the half-type locking nut, and when it contacts the blind hole on the bottom surface of the oil cylinder, the outer cylinder of the jacking assembly is rotated to screw the outer cylinder of the jacking assembly into the blind hole on the bottom surface of the oil cylinder, and then the wire rope is passed through the ring of the jacking assembly push rod, and then one end of the wire rope is hung on the lower hanging ear at the bottom of the oil cylinder, and the other end is hung on the piston rod part of the piston rod located below the half-type locking nut. Finally, under the action of the spring, the push rod moves downward, and the wire rope is in a taut state, so as to prevent the wire rope from slipping off the lower hanging ear at the bottom of the oil cylinder, or from slipping off from the piston rod part of the piston rod located below the half-type locking nut.

[0112] In addition, the force of the spring is much smaller than the force borne by the wire rope during lifting and transportation, so it will not affect the normal lifting of the cylinder piston rod.

[0113] This embodiment 1 is combined with embodiment 2 to form a new embodiment 4

[0114] This embodiment 2 is combined with embodiment 3 to form a new embodiment 5

[0115] This embodiment 3 is combined with embodiment 1 and embodiment 2 to form a new embodiment 6.

[0116] The technical solutions of the above embodiments are only used to illustrate the invention, not to limit it. Although the invention is described in detail with reference to the technical solutions of the above embodiments, a person skilled in the art should understand that the above technical solutions can still be modified, or some of the technical features thereof can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the invention.

Claims

1. An integral hoisting device for a cylinder and a piston rod, wherein the cylinder and the piston rod are both capable of being independently hoisted and transported, and characterized in that: The hoisting device comprises a first component, a second component and a dam gantry crane, The oil cylinder is sleeved outside the piston rod, The bottom of the piston rod is fixed and supported on the bottom of the oil cylinder through a first component, so as to limit the downward movement and circumferential rotation of the piston rod relative to the oil cylinder. Furthermore, the top of the piston rod is fixed and supported on the top of the oil cylinder through a second component, which is used to limit the downward movement and circumferential rotation of the piston rod relative to the oil cylinder, so that the oil cylinder and the piston rod form a whole. The dam gantry crane is hoisted and connected to the top of the oil cylinder. When the dam gantry crane lifts the oil cylinder and moves it upward, the piston rod moves upward synchronously with the oil cylinder under the joint action of the first component and the second component; The first component is mainly composed of a half-type locking nut, a first threaded fastener, a wire rope, an upper anti-rotation seat, a lower anti-rotation seat, an anti-rotation column and a locking nut. Two lower hanging ears are symmetrical to each other on the outer peripheral wall surface of the bottom of the oil cylinder. The bottom of the piston rod extends out of the lower end port of the oil cylinder, and the outer peripheral wall surface of the bottom is provided with an external thread. The split-half locking nut is composed of two semicircular nuts symmetrical to each other, one end of one semicircular nut is hingedly connected to one end of the other semicircular nut, the other end of one semicircular nut and the other end of the other semicircular nut are both provided with first connecting ears, and the two first connecting ears are provided with through threaded holes. The split-half locking nut is sleeved on the external thread at the bottom of the piston rod, and the first threaded fastener passes through the threaded hole on the first connecting ear of one semicircular nut and the threaded hole on the first connecting ear of the other semicircular nut in sequence. The first threaded fastener is adjusted so that the split-half locking nut is threaded and fastened to the external thread at the bottom of the piston rod. There are multiple steel wire ropes, and both ends of each steel wire rope are set into closed rope loops. The rope loops at both ends of each steel wire rope correspond to the hanging loops on the lower lifting ears at the bottom of the oil cylinder and the piston rod part of the piston rod located below the half-type locking nut. When the top of the piston rod is fixed and supported on the top of the oil cylinder by the first component to limit the downward movement of the piston rod relative to the oil cylinder, these steel wire ropes are in a taut state, thereby limiting the downward movement of the piston rod relative to the oil cylinder; There are two upper anti-rotation seats, which are symmetrically arranged on the outer peripheral wall surface of the bottom of the oil cylinder, and the two upper anti-rotation seats are vertically provided with a first through hole. There are two lower anti-rotation seats, which are symmetrically arranged on the outer peripheral wall of the half-type locking nut. One lower anti-rotation seat is arranged on the outer peripheral wall of one semicircular nut, and the other lower anti-rotation seat is arranged on the outer peripheral wall of the other semicircular nut. The two lower anti-rotation seats are vertically provided with second through holes. There are two anti-rotation columns, each of which is divided into an upper section and a lower section. The outer diameter of the upper section anti-rotation column is equal to the outer diameter of the lower section anti-rotation column. The outer diameter of the upper section anti-rotation column is equal to the inner diameter of the first through hole. The outer peripheral wall of the lower section anti-rotation column is provided with an external thread, and the maximum outer diameter of the lower section anti-rotation column is equal to the inner diameter of the second through hole. There are two locking nuts, which can be screwed onto the external threads of the lower anti-rotation column. The anti-rotation column passes through the first through hole from top to bottom. Before the anti-rotation column enters the second through hole, a locking nut is screwed onto the external thread of the anti-rotation column. After the anti-rotation column passes through the second through hole, another locking nut is screwed onto the external thread of the anti-rotation column. The two locking nuts are screwed to clamp the lower anti-rotation seat, so that the anti-rotation column restricts the upper anti-rotation seat and the lower anti-rotation seat from rotating relative to each other, thereby restricting the circumferential rotation of the piston rod relative to the oil cylinder. The second component is mainly composed of a bar-shaped square steel, an anti-rotation ring, a second threaded fastener and a third threaded fastener. Two upper lifting ears are symmetrical to each other on the outer peripheral wall surface of the top of the oil cylinder. The top of the piston rod extends out of the upper end port of the oil cylinder, and a lifting ring is provided above the top. The two square steel bars are long and square in cross section. The two square steel bars are arranged in parallel and cooperate with each other to clamp the top of the piston rod and the part between the lifting ring at the top of the piston rod. The two square steel bars are located on the top of the oil cylinder, and the weight of the piston rod is transferred to the top of the oil cylinder through the two square steel bars to support and bear, thereby limiting the downward movement of the piston rod relative to the oil cylinder. The two ends of one bar-shaped square steel extend horizontally out of the top surface of the oil cylinder, and the two ends of another bar-shaped square steel extend horizontally out of the top surface of the oil cylinder. One end of one bar square steel and one end of another bar square steel are both provided with bending portions bent toward each other, the other end of one bar square steel and the other end of another bar square steel are both provided with bending portions bent toward each other, and the four bending portions are all vertically provided with first threaded holes, The anti-rotation ring is formed into a circular ring by two semicircular rings, one end of the anti-rotation ring of one semicircular ring is hingedly connected to one end of the anti-rotation ring of the other semicircular ring, and the other end of the anti-rotation ring of one semicircular ring and the other end of the anti-rotation ring of the other semicircular ring are both provided with a second connecting ear. The annular upper surface of the anti-rotation ring is provided with four through second threaded holes corresponding to the first threaded holes, and the annular outer peripheral wall surface of the anti-rotation ring is provided with two limiting notches corresponding to and matching the upper lifting ears of the oil cylinder, and the edges of the two limiting notches face downwards. The anti-rotation ring is sleeved on the edges of the top of the oil cylinder, and the second threaded fastener is passed through the second connecting ear at the other end of a semicircular anti-rotation ring and the second connecting ear at the other end of another semicircular anti-rotation ring in sequence, and fixed and locked, so that each first threaded hole corresponds to a second threaded hole, and each limiting notch is stuck on the outside of a corresponding upper lifting ear. There are four third threaded fasteners, each of which is screwed into a corresponding first threaded hole and a second threaded hole corresponding to the first threaded hole in sequence from top to bottom. When the bottom of the piston rod is fixed and supported at the lower part of the oil cylinder by the second component to limit the downward movement of the piston rod relative to the oil cylinder, the oil cylinder supports the weight of the piston rod through the two bars of square steel.

2. The oil cylinder piston rod integral lifting device according to claim 1, characterized in that: The dam gantry crane uses an 85t auxiliary hook to be hoisted and connected to the top of the cylinder.

3. The oil cylinder piston rod integral lifting device according to claim 1, characterized in that: The second component further includes a connecting member, a first magnet and a second magnet, The connecting pieces are two, arranged in parallel and matched with each other. The connecting piece is in the shape of "П", and is composed of a horizontal bar, a vertical bar and a guide block. The horizontal bar is provided with a first magnet. The two ends of the horizontal bar are respectively fixedly connected to one of the vertical bars. The inner sides of the two vertical bars facing each other are respectively provided with a guide block. The two strip-shaped square steels are provided with a horizontally arranged guide groove matching the guide block on their outer sides facing away from each other, and two notches matching the guide block are provided on the lower inner wall of each guide groove. The two connecting parts are respectively installed from the two ends of the two bar-shaped square steels, so that the guide blocks at both ends of each connecting part are slid and inserted into the corresponding guide grooves, until the guide blocks at both ends of each connecting part fall into the corresponding notches. At the same time, the cross bars of the connecting parts are respectively attached to the top surfaces of the two bar-shaped square steels, and the first magnets on the cross bars of the connecting parts are respectively attracted by the second magnets corresponding to the top surfaces of the bar-shaped square steels, so that the two connecting parts are located on both sides of the top lifting ring of the piston rod.

4. A method for hoisting a cylinder piston rod as a whole, characterized in that: The first component, the second component and the dam gantry crane are used to realize the overall hoisting, and the steps of the hoisting method are: (1) Drain the hydraulic oil in the oil cylinder and keep the oil cylinder and the piston rod in a state where they can be independently hoisted and transported. At the same time, use the dam gantry crane to hoist the piston rod and limit the downward movement of the piston rod relative to the oil cylinder; (2) installing the first component on the bottom of the oil cylinder and the bottom of the piston rod respectively, so that the bottom of the oil cylinder and the bottom of the piston rod form a whole; (3) installing the second component on the top of the oil cylinder and the top of the piston rod respectively, so that the top of the oil cylinder and the top of the piston rod form a whole; (4) dismantling the lifting connection between the dam gantry crane and the piston rod; (5) hoisting and connecting the dam gantry crane to the top of the oil cylinder; (6) The dam gantry crane lifts the oil cylinder and moves it upward. Under the joint action of the first component and the second component, the piston rod moves upward synchronously with the oil cylinder, thereby realizing the overall lifting process of the oil cylinder and the piston rod; In step (2), two lower lifting ears are symmetrical to each other on the outer peripheral wall surface of the bottom of the oil cylinder, and the outer peripheral wall surface of the bottom of the piston rod has an external thread. The first component is mainly composed of a half-type locking nut, a first threaded fastener, a wire rope, an upper anti-rotation seat, a lower anti-rotation seat, an anti-rotation column and a locking nut. There are multiple steel wire ropes, and there are two upper anti-rotation seats, which are symmetrically arranged on the outer peripheral wall surface of the bottom of the oil cylinder. The two upper anti-rotation seats are vertically provided with a first through hole. There are two lower anti-rotation seats, which are symmetrically arranged on the outer peripheral wall of the half-type locking nut. One lower anti-rotation seat is arranged on the outer peripheral wall of one semicircular nut, and the other lower anti-rotation seat is arranged on the outer peripheral wall of the other semicircular nut. The two lower anti-rotation seats are vertically provided with second through holes. In order to install the first component at the bottom of the oil cylinder and the bottom of the piston rod respectively, the steps are: (I) Sleeving the half-type locking nut onto the external thread at the bottom of the piston rod and locking it with a first threaded fastener; (II) Hanging the two ends of each steel wire rope on the lower lifting lugs at the bottom of the oil cylinder and the piston rod portion below the half-type locking nut; (III) passing the anti-rotation post through the first through hole from top to bottom, and then screwing a locking nut onto the external thread of the anti-rotation post before the anti-rotation post enters the second through hole, and then screwing another locking nut onto the external thread of the anti-rotation post after the anti-rotation post passes through the second through hole, and finally screwing the two locking nuts so that the two locking nuts can clamp the lower anti-rotation seat; In step (3), two upper lifting ears symmetrical to each other are provided on the outer peripheral wall surface of the top of the oil cylinder, and a lifting ring is provided above the top of the piston rod. The second component is mainly composed of a bar-shaped square steel, an anti-rotation ring, a second threaded fastener and a third threaded fastener. There are two bar-shaped square steels, one end of one bar-shaped square steel and one end of the other bar-shaped square steel are both provided with bending portions bending toward each other, the other end of one bar-shaped square steel and the other end of the other bar-shaped square steel are both provided with bending portions bending toward each other, and the four bending portions are all vertically provided with first threaded holes, The anti-rotation ring is formed into a circular ring by two semicircular rings, one end of the anti-rotation ring of one semicircular ring is hingedly connected to one end of the anti-rotation ring of the other semicircular ring, and the other end of the anti-rotation ring of one semicircular ring and the other end of the anti-rotation ring of the other semicircular ring are both provided with a second connecting ear, and four through-going second threaded holes corresponding to the first threaded holes are provided on the annular upper surface of the anti-rotation ring, and two limiting notches corresponding to and matching the upper lifting ears of the oil cylinder are provided on the annular outer peripheral wall surface of the anti-rotation ring, and the edges of the two limiting notches face downward, In order to install the second component on the top of the oil cylinder and the top of the piston rod respectively, the steps are: (α) clamping the two square steel bars between the top of the piston rod and the lifting ring at the top of the piston rod, and placing the two square steel bars on the top surface of the oil cylinder; (β) First, the anti-rotation ring is put on the edges around the top of the oil cylinder, and then the second threaded fastener is passed through the second connecting ear at the other end of one semicircular anti-rotation ring and the second connecting ear at the other end of the other semicircular anti-rotation ring in sequence, and fixed and locked so that each first threaded hole corresponds to a second threaded hole, and each limiting notch is stuck on the outside of a corresponding upper lifting ear; (γ) Screw the third threaded fastener into a corresponding first threaded hole from top to bottom, and then continue to screw it downward into the second threaded hole corresponding to the first threaded hole.

5. The method for integrally lifting the cylinder piston rod according to claim 4 is characterized in that: In step (1), the dam gantry crane adopts an 85t auxiliary hook and a 30t sling with a length of 10m. One end of the sling is connected to the auxiliary hook of the dam gantry crane, and the other end is connected to the lifting ring of the piston rod.

6. The method for integrally lifting the cylinder piston rod according to claim 4, characterized in that: In step (5), two upper lifting ears symmetrical to each other are provided on the outer peripheral wall surface of the top of the oil cylinder. The dam gantry crane adopts an 85t auxiliary hook and a 30t sling with a length of 10m. One end of the sling is connected to the auxiliary hook of the dam gantry crane, and the other end is connected to the upper lifting ear of the oil cylinder.

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