CN109577866B

CN109577866B - Construction method of independent hydraulic telescopic derrick

Info

Publication number: CN109577866B
Application number: CN201811444326.8A
Authority: CN
Inventors: 方刚; 陈新龙; 彭太锋; 金宗祥; 张斌; 张振勇
Original assignee: Sinopec Oilfield Equipment Corp; Sinopec Siji Petroleum Machinery Co Ltd
Current assignee: Sinopec Oilfield Equipment Corp; Sinopec Siji Petroleum Machinery Co Ltd
Priority date: 2018-10-18
Filing date: 2018-11-29
Publication date: 2020-09-08
Anticipated expiration: 2038-11-29
Also published as: CN109577866A

Abstract

The invention provides a construction method of an independent hydraulic telescopic derrick, which comprises the following steps: s1, mutually sleeving the lower derrick section, the middle derrick section and the upper derrick section, and locking by a locking pin; s2, transporting the derrick to a construction site by using a transport vehicle; s3, hoisting the derrick by a crane and connecting the lower section of the derrick with a derrick foundation by a pin; s4, the crane assists in lifting the derrick to a working position, and a guy rope is installed to reliably fix the derrick; s5, loosening locking pins of the lower section of the derrick, the middle section of the derrick and the upper section of the derrick, connecting and starting a hydraulic station, starting a middle section telescopic oil cylinder to lift the middle section of the derrick and the upper section of the derrick, and starting a locking pin device to lock the position of the middle section of the derrick after the middle section telescopic oil cylinder is in place; starting an upper section telescopic oil cylinder to jack the upper section of the derrick to the right position, and locking the position of the upper section of the derrick through a self-locking device; through the steps, the derrick lifting construction is realized. The invention can overcome the defects in the prior art, and has smaller transportation length and better road transportation performance.

Description

Construction method of independent hydraulic telescopic derrick

Technical Field

The invention relates to the field of derrick for well repair in the petroleum and gas industry, in particular to a construction method of an independent hydraulic telescopic derrick.

Background

At present, self-propelled vehicle-mounted workover rig is mainly adopted in workover equipment in the petroleum and gas industry. However, most of oil and gas wells in the four-river oil fields, the Changqing oil fields and other places in China are located in mountainous areas and hilly lands, the road transportation conditions of the oil areas are poor, and the conventional self-propelled vehicle-mounted workover rig has poor passing performance and cannot adapt to the working environment of the areas due to the cross-country capacity, turning radius and the like.

According to research and analysis, the oil area adopts the following main solution to solve the problem: a crawler-type tractor hoist with excellent trafficability replaces a winch of a conventional workover rig, a free-standing two-section pin-connected or bolted derrick is matched, the clearance height of the derrick is 29m, two sections are folded during transportation and dragged by a flat trailer, an upper section and a lower section are connected together by using a crane during operation, then the upper section and the lower section are lifted to a bracket of a special derrick vertical placing vehicle, a lifting oil cylinder on the derrick vertical placing vehicle is used for pushing the bracket to lift the derrick in place, then a guy rope is tied up, the derrick vertical placing vehicle retracts the bracket and then automatically drives away, and the crawler-type tractor hoist is in place to carry out workover operation. For example, a large-space telescopic derrick described in chinese patent document CN 2769489Y.

The main problems with this solution are as follows:

1. the independent two-section pin-jointed or bolted derrick has larger transportation length. Two sections of derrick with clear height of 29m are in pin joint or bolt joint, the total length of the two sections is about 15 m in a transportation state after being folded, and the requirement on turning radius is high;

2. the process of connecting the upper derrick and the lower derrick wastes time and labor, has poor safety and is difficult to lift;

3. the process of hoisting the derrick to the bracket of the derrick vertical placement vehicle is time-consuming, labor-consuming and poor in safety;

4. the cost of the equipped derrick vertical placing vehicle is high. The conventional derrick vertical placing vehicle mainly comprises a second-class chassis, a hydraulic oil tank, a front support, a rear support, a derrick bracket, a lifting oil cylinder, a locking oil cylinder, an adjusting oil cylinder and the like, and the cost is high.

5. In the derrick lifting process, the lifting capacity of a crane is required to reach more than 25 tons, and the lifting height requirement is high. There are safety risks during construction.

Disclosure of Invention

The invention aims to solve the technical problem of providing a construction method of an independent hydraulic telescopic derrick, which can shorten the transportation length of the derrick, greatly reduce the erection difficulty of the derrick and reduce the lifting operation difficulty of the derrick.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a construction method of an independent hydraulic telescopic derrick comprises the following steps:

s1, mutually sleeving the lower derrick section, the middle derrick section and the upper derrick section, and locking by a locking pin;

s2, transporting the derrick to a construction site by using a transport vehicle;

s3, hoisting the derrick by a crane and connecting the lower section of the derrick with a derrick foundation by a pin;

s4, the crane assists in lifting the derrick to a working position, and a guy rope is installed to reliably fix the derrick;

s5, loosening locking pins of the lower section of the derrick, the middle section of the derrick and the upper section of the derrick, connecting and starting a hydraulic station, starting a middle section telescopic oil cylinder to lift the middle section of the derrick and the upper section of the derrick, and starting a locking pin device to lock the position of the middle section of the derrick after the middle section telescopic oil cylinder is in place;

starting an upper section telescopic oil cylinder to jack the upper section of the derrick to the right position, and locking the position of the upper section of the derrick through a self-locking device;

through the steps, the derrick lifting construction is realized.

In the preferable scheme, when the derrick is recovered, the upper section of the derrick is recovered by starting the upper section telescopic oil cylinder to lock the upper section of the derrick by the locking pin, then the middle section telescopic oil cylinder is started to recover the middle section of the derrick and the upper section of the derrick by the locking pin to lock the middle section of the derrick, the derrick is integrally lifted by the crane to loosen the guy rope, and the derrick recovery operation is completed through the steps.

In a preferred scheme, in the step s4, in the process of lifting the derrick, at least one telescopic oil cylinder is detached from the derrick;

a jacking foundation pit is arranged below the horizontal derrick, one end of a telescopic oil cylinder is fixedly arranged on the jacking foundation pit through a winch base, the other end of the telescopic oil cylinder is connected with the derrick through the winch base, and a piston rod of the telescopic oil cylinder synchronously extends out in the hoisting process of the crane;

and after the lifting is finished, the telescopic oil cylinder is installed back to the derrick.

In the preferable scheme, a middle section telescopic oil cylinder is arranged between a lower section of the derrick and a middle section of the derrick, and an upper section telescopic oil cylinder is arranged between the middle section of the derrick and an upper section of the derrick;

the cross section of the lower section of the derrick comprises two lower section side trusses and a lower section bottom truss, and the lower section bottom truss is fixedly connected with the end head of the lower section side truss;

the cross section of the middle section of the derrick comprises two middle section side trusses and a middle section bottom truss, the middle section bottom truss is fixedly connected with a position close to the end head of the middle section side truss, the cross section of the middle section of the derrick is H-shaped, and a middle section telescopic oil cylinder is positioned between the lower section bottom truss and the middle section bottom truss;

the cross section of the upper section of the derrick comprises two upper section side trusses and an upper section bottom truss, the upper section bottom truss is fixedly connected with a position close to the end head of the upper section side truss, the cross section of the upper section of the derrick is H-shaped, and the upper section telescopic oil cylinder is positioned between the middle section bottom truss and the upper section telescopic oil cylinder.

In the preferred scheme, a lower-section bottom limiting rod and a lower-section top limiting rod are respectively arranged at two ends of the inner side of the lower-section side truss;

the two ends of the middle section side truss are respectively provided with a middle section bottom limiting rod and a middle section top limiting rod, the lower section bottom limiting rod is in sliding contact with the middle section bottom limiting rod, and the lower section top limiting rod is in sliding contact with the middle section top limiting rod;

the inner free end of the middle section side truss is provided with a middle section first limiting rod, the middle section bottom truss is provided with a middle section second limiting rod, the two ends of the upper section side truss are respectively provided with an upper section top limiting rod and an upper section bottom limiting rod, the middle section first limiting rod is in sliding contact with the upper section top limiting rod, and the middle section second limiting rod is in sliding contact with the upper section bottom limiting rod.

In the preferable scheme, an upper section telescopic oil cylinder is arranged between a middle section of the derrick and an upper section of the derrick, and an oil cylinder guide device is also arranged, wherein two upper guide swing arms are positioned at two sides of the upper section telescopic oil cylinder in the oil cylinder guide device, the upper guide swing arms are hinged with an upper guide swing seat fixedly arranged at the middle section of the derrick, and the free ends of the upper guide swing arms are provided with upper guide rings;

an upper guide tension spring is arranged between the upper guide swing arm and the derrick middle section;

an upper guide collision block is arranged on the upper guide swing arm, an upper guide sliding rail is fixedly arranged on the upper section of the derrick, and the upper guide sliding rail is in sliding contact with the upper guide collision block so that the upper guide swing arm is in an open state in a partial stroke of jacking the upper section of the derrick, and the upper guide ring is folded to embrace the upper section telescopic oil cylinder in the partial stroke;

two middle-section telescopic oil cylinders are arranged between the lower section of the derrick and the middle section of the derrick, and an oil cylinder guide device is also arranged, wherein a middle guide swing arm positioned in the middle is hinged with a lower-section bottom truss of the lower section of the derrick, middle side guide swing arms positioned on two sides are hinged with a lower-section side truss of the lower section of the derrick, and free ends of the middle guide swing arms and the middle side guide swing arms are provided with middle guide rings;

the middle guide swing arm is connected with the lower derrick section through a middle guide tension spring;

the middle section of the derrick is also provided with a middle guide slide rail which is in sliding contact with the middle guide swing arm and the middle side guide swing arm so that the middle guide swing arm and the middle side guide swing arm are in an open state in a partial stroke of jacking of the middle section of the derrick, and the middle guide ring is folded to embrace the middle section telescopic oil cylinder in the partial stroke.

In the preferred scheme, a lock pin device is arranged at the position of the lower section of the derrick, which is close to the top end, wherein a rotating pin seat is fixedly connected with the lower section of the derrick, one end of a rotating pin is hinged with the rotating pin seat, the rotating pin is L-shaped, a bulge part is arranged outside the middle bending part of the rotating pin, one end of a lock pin cylinder is connected with the bulge part, the other end of the lock pin cylinder is fixedly connected with the lower section of the derrick, and when the lock pin cylinder retracts, the free end of the rotating pin extends into the lower section of the derrick;

the derrick structure is characterized in that a self-locking device is arranged at a position, close to the bottom end, of the upper derrick section, wherein one end of a self-locking wedge block positioned on two sides is hinged with the upper derrick section;

the free end of the self-locking wedge block is provided with a wedge surface, so that the upper section of the derrick can slide away in the jacking process and form support in the falling process.

In the preferable scheme, the end positions of the lower section and the middle section of the derrick are also provided with anti-vibration devices which are positioned at the positions close to the bottom truss, in the anti-vibration devices, anti-vibration beams are connected with the bottom truss in a sliding manner, anti-vibration wedges inserted between limiting rods are fixedly arranged on one sides of the anti-vibration beams, the anti-vibration beams are connected with the bottom truss through anti-vibration tension springs, and a disengagement cylinder is arranged between the anti-vibration beams and the bottom truss;

after the derrick is lifted to the right position, the anti-vibration wedge block of the anti-vibration device is inserted between the lower section of the derrick and the middle section of the derrick, and between the middle section of the derrick and the upper section of the derrick.

In the preferred scheme, one side of the lower section of the derrick is connected with a derrick diagonal brace, and the inclination of the derrick is adjusted to 3-8 degrees.

In the preferred scheme, before the derrick is lifted, when the derrick is in a horizontal position, a hanging bracket assembly is arranged at the top of an upper section of the derrick;

and installing an operation platform on the derrick middle section.

The construction method of the independent hydraulic telescopic derrick provided by the invention has the following beneficial effects by adopting the scheme:

1. the defects in the prior art can be overcome, the transport length is shorter, and the road transport performance is better. The total length of the three-section telescopic derrick with the clear height of 29 meters after the upper section and the middle section are retracted to the lower section in a transportation state is only 12.8 meters, and is 2.2 meters shorter than the transportation length of the upper section and the middle section.

2. The installation process of the invention is more convenient and safer. The independent hydraulic telescopic derrick is characterized in that an upper derrick section and a middle derrick section are recovered into a lower derrick section during transportation, a crane is used for assisting in hoisting the derrick during operation and is in pin joint with a derrick foundation embedded in an anchor pit near a wellhead, the crane is used again for hoisting the whole derrick from a horizontal state to a state of about 85 degrees with the ground, a guy rope is pulled, a telescopic oil cylinder is controlled to sequentially extend out of the middle and upper sections, and a crawler-type drifting machine is in place to carry out well repairing operation.

3. The hydraulic station and the telescopic oil cylinder which are equipped by the invention are much more economical than the derrick vertical placement vehicle. The platform trailer, the crane, the hydraulic station and the derrick vertical placing vehicle can realize the sharing of multiple well positions, and can finish the transportation, lifting and lowering operation of the derrick in a one-to-many way. Therefore, when the cost of the independent two-section pin-jointed or bolted derrick is compared with that of the three-section independent hydraulic telescopic derrick, the difference is that the independent two-section pin-jointed or bolted derrick needs to be equipped with a special derrick vertical placement vehicle, but the independent hydraulic telescopic derrick only needs to be equipped with a hydraulic station and a telescopic oil cylinder for derrick lifting, so that the cost can be greatly saved.

4. By adopting the telescopic oil cylinder and crane auxiliary lifting mode, the safety in the lifting process can be improved.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a schematic structural view of the derrick during transportation according to the invention.

Fig. 2 is a schematic structural diagram of a lifting process of the present invention.

Fig. 3 is a structural schematic diagram of the lifting completion of the invention.

Fig. 4 is a schematic structural diagram after the installation of the present invention is completed.

Fig. 5 is a schematic cross-sectional view of the present invention.

Fig. 6 is a schematic structural view of the oil cylinder guide device between the derrick middle section and the derrick upper section when the oil cylinder guide device is folded.

Fig. 7 is a schematic structural diagram of the oil cylinder guide device between the derrick middle section and the derrick upper section in the invention when the oil cylinder guide device is opened.

FIG. 8 is a schematic sectional view taken along line B-B in FIG. 7.

FIG. 9 is a schematic sectional view taken along line A-A in FIG. 6.

Fig. 10 is a schematic front view of the oil cylinder guide device between the lower section and the middle section of the derrick in the invention.

Fig. 11 is a schematic front view of the oil cylinder guide device between the lower section and the middle section of the derrick in the invention.

Fig. 12 is a schematic structural view of the middle guide swing arm in the middle guide slide rail driving oil cylinder guide device of the invention when being opened.

FIG. 13 is a schematic cross-sectional view C-C of FIG. 11.

Fig. 14 is a schematic structural view of a hanger assembly of the present invention.

FIG. 15 is a schematic view of the latch mechanism of the present invention.

Fig. 16 is a schematic structural view of the self-locking device of the present invention.

Fig. 17 is a schematic view of the structure of the vibration isolator in the present invention.

In the figure: a derrick lower section 1, a derrick lower section side truss 101, a lower section stopper 102, a derrick lower section bottom truss 103, a lower section bottom stopper 104, a derrick lower section top stopper 105, a derrick middle section 2, a middle section first stopper 201, a middle section top stopper 202, a middle section side truss 203, a middle section bottom stopper 204, a middle section bottom truss 205, a middle section telescopic cylinder 206, a middle section second stopper 207, a derrick upper section 3, an upper section top stopper 301, an upper section side truss 302, an upper section bottom stopper 303, an upper section bottom truss 304, an upper section telescopic cylinder 305, a derrick 4, an anti-vibration wedge 41, an anti-vibration beam 42, a release cylinder 43, an anti-vibration tension spring 44, a derrick foundation 5, a hanger assembly 6, a first guide wheel 62, a first guide wheel 63, a second guide wheel 64, a self-locking device 7, a self-locking wedge 71, a self-locking push rod 72, a self-locking tension spring 73, a self-locking swing rod 74, a cylinder guide device 8, an upper guide swing arm 81, the device comprises an upper guide collision block 82, an upper guide ring 83, an upper guide tension spring 84, an upper guide sliding rail 85, an upper guide swinging seat 86, a middle guide swinging arm 801, a middle guide ring 802, a middle guide swinging arm 803, a middle guide tension spring 804, a middle guide tension spring 805, a middle guide sliding rail 806, a lock pin device 9, a rotating pin seat 91, a rotating pin 92, a boss 93, a lock pin cylinder 94, a derrick inclined strut 10, a wellhead center line 11, an operation platform 12, a guy rope assembly 13, a sleeved derrick 14, a transportation support 15, a lock pin 16, a derrick 1000, a crane 1001, a telescopic oil cylinder 1002 and a jacking foundation pit 1003.

Detailed Description

Example 1:

referring to the attached drawings, the independent hydraulic telescopic derrick used for the method is shown in fig. 3-5, and comprises a derrick lower section 1, a derrick middle section 2 and a derrick upper section 3 which are mutually sleeved, a middle section telescopic oil cylinder 206 is arranged between the derrick lower section 1 and the derrick middle section 2, and an upper section telescopic oil cylinder 305 is arranged between the derrick middle section 2 and the derrick upper section 3. By the structure, the transportation length can be greatly reduced through the mutually sleeved lower derrick section 1, the middle derrick section 2 and the upper derrick section 3, the turning radius is reduced, and the characteristics of transportation roads of oil fields in mountain areas can be adapted. The jacking oil cylinder can greatly reduce the requirement on the hoisting height of the crane.

Preferably, as shown in fig. 5, the cross section of the lower derrick section 1 includes two lower derrick side trusses 101 and a lower derrick bottom truss 103, and the lower derrick bottom truss 103 is fixedly connected with the ends of the lower derrick side trusses 101;

the cross section of the derrick middle section 2 comprises two middle section side trusses 203 and a middle section bottom truss 205, the middle section bottom truss 205 is fixedly connected with a position close to the end of the middle section side truss 203, the cross section of the derrick middle section 2 is H-shaped, and a middle section telescopic oil cylinder 206 is positioned between the lower section bottom truss 103 and the middle section bottom truss 205;

the cross section of the derrick upper section 3 comprises two upper section side trusses 302 and an upper section bottom truss 304, the upper section bottom truss 304 is fixedly connected with the position close to the end of the upper section side truss 302, the cross section of the derrick upper section 3 is H-shaped, and an upper section telescopic oil cylinder 305 is positioned between a middle section bottom truss 205 and the upper section telescopic oil cylinder 305. With this structure, a large position space for installing the lift-up cylinder can be obtained. And the stress condition is more reliable. Further preferably, the upper-stage telescopic cylinder 305 and the middle-stage telescopic cylinder 206 in this example are configured by a multi-stage cylinder, for example, a three-stage cylinder, and thus the installation space of the cylinders is further reduced. In a further preferred scheme, the middle-section bottom limiting rod 204 and the lower-section bottom limiting rod 104 are further provided with pore plates, and when the two pore plates are sleeved, the two pore plates are overlapped, so that a locking pin can be conveniently inserted into the pore plates, and the separation in the transportation process is avoided. A hole plate for locking with each other is also arranged between the upper-section bottom limit rod 303 and the middle-section second limit rod 207. Facilitating the penetration of the locking pins to avoid disengagement during transport.

In a preferred scheme, as shown in fig. 5, a lower-section bottom limiting rod 104 and a lower-section top limiting rod 105 are respectively arranged at two ends of the inner side of a lower-section side truss 101;

the two ends of the middle-section side truss 203 are respectively provided with a middle-section bottom limiting rod 204 and a middle-section top limiting rod 202, the lower-section bottom limiting rod 104 is in sliding contact with the middle-section bottom limiting rod 204, and the lower-section top limiting rod 105 is in sliding contact with the middle-section top limiting rod 202;

the inner free end of the middle-section side truss 203 is provided with a middle-section first limiting rod 201, the middle-section bottom truss 205 is provided with a middle-section second limiting rod 207, the two ends of the upper-section side truss 302 are respectively provided with an upper-section top limiting rod 301 and an upper-section bottom limiting rod 303, the middle-section first limiting rod 201 is in sliding contact with the upper-section top limiting rod 301, and the middle-section second limiting rod 207 is in sliding contact with the upper-section bottom limiting rod 303. By the structure, the sliding fit precision among the lower derrick section 1, the middle derrick section 2 and the upper derrick section 3 can be improved, and in the application, the gaps among the lower derrick section 1, the middle derrick section 2 and the upper derrick section 3 are within 5 mm. Higher accuracy is beneficial to reducing vibration of the derrick.

In the preferred scheme as shown in fig. 6-9, an upper section telescopic oil cylinder 305 is arranged between a derrick middle section 2 and a derrick upper section 3, and an oil cylinder guide device 8 is also arranged, wherein in the oil cylinder guide device 8, two upper guide swing arms 81 are positioned at two sides of the upper section telescopic oil cylinder 305, the upper guide swing arms 81 are hinged with an upper guide swing seat 86 fixedly arranged on the derrick middle section 2, and the free ends of the upper guide swing arms 81 are provided with upper guide rings 83;

an upper guide tension spring 84 is arranged between the upper guide swing arm 81 and the derrick middle section 2;

an upper guide collision block 82 is arranged on the upper guide swing arm 81, an upper guide sliding rail 85 is fixedly arranged on the derrick upper section 3, and the upper guide sliding rail 85 is in sliding contact with the upper guide collision block 82, so that the upper guide swing arm 81 is in an open state in a partial stroke of jacking of the derrick upper section 3, for example, the first half stroke of jacking, and the upper guide ring 83 is folded to hold the upper section telescopic oil cylinder 305 in the partial stroke, for example, the second half stroke of jacking. Through the arranged oil cylinder guide device 8, the movement of the upper section telescopic oil cylinder 305 can be guided, and the lateral stress of the upper section telescopic oil cylinder 305 is reduced. The provided upper guide slide rail 85 and the swinging upper guide swing arm 81 can avoid interference.

In a preferable scheme, as shown in fig. 10-13, two middle-section telescopic oil cylinders 206 are arranged between a derrick lower section 1 and a derrick middle section 2, and an oil cylinder guide device is further arranged, wherein a middle guide swing arm 801 positioned in the middle is hinged with a lower-section bottom truss 103 of the derrick lower section 1, middle side guide swing arms 803 positioned at two sides are hinged with a lower-section side truss 101 of the derrick lower section 1, and free ends of the middle guide swing arm 801 and the middle side guide swing arm 803 are provided with middle guide rings 802;

the middle guide swing arm 801 is connected with the derrick lower section 1 through a middle guide tension spring 805, and the middle guide swing arm 803 is connected with the derrick lower section 1 through a middle guide tension spring 804;

the derrick middle section 2 is further provided with a middle guide slide rail 806, and the middle guide slide rail 806 is in sliding contact with the middle guide swing arm 801 and the middle guide swing arm 803, so that the middle guide swing arm 801 and the middle guide swing arm 803 are in an open state in a partial stroke of jacking of the derrick middle section 2, for example, in the first half stroke of jacking, and the middle guide ring 802 is folded to embrace the middle section telescopic cylinder 206 in a partial stroke, for example, in the second half stroke of jacking. By the structure, the movement of the middle-section telescopic oil cylinder 206 can be guided, the lateral stress of the middle-section telescopic oil cylinder 206 is reduced, and the jacking reliability and safety are improved.

In a preferred scheme, as shown in fig. 15, a lock pin device 9 is arranged at a position close to the top end of the derrick lower section 1, in the lock pin device 9, a rotating pin seat 91 is fixedly connected with the derrick lower section 1, one end of a rotating pin 92 is hinged with the rotating pin seat 91, the rotating pin 92 is in an "L" shape, a protruding part 93 is arranged outside the middle bending part of the rotating pin 92, one end of a lock pin cylinder 94 is connected with the protruding part 93, the other end of the lock pin cylinder 94 is fixedly connected with the derrick lower section 1, and when the lock pin cylinder 94 retracts, the free end of the rotating pin 92 extends into the derrick lower section 1. With this structure, before the derrick upper section 3 starts to be jacked, the piston rod of the lock pin cylinder 94 extends to rotate the rotating pin 92, and the free part of the rotating pin 92 leaves the side wall of the derrick lower section 1, so that the derrick middle section 2 can be jacked freely. When the derrick middle section 2 is jacked in place, the piston rod of the lock pin cylinder 94 retracts to enable the rotating pin 92 to rotate, the rotating pin 92 is placed on the rotating pin seat 91, the free end of the rotating pin 92 extends into the derrick lower section 1 and is located below the derrick middle section 2 or in a pin hole of the derrick middle section 2, at the moment, the pressure of the pressure relief middle section telescopic cylinder 206 is released, the derrick middle section 2 falls on the rotating pin 92, and the derrick middle section 2 is supported.

According to the preferable scheme, as shown in fig. 16, a self-locking device 7 is arranged at a position of a derrick upper section 3 close to the bottom end, in the self-locking device 7, one end of a self-locking wedge 71 respectively positioned at two sides is hinged with the derrick upper section 3, the self-locking wedge 71 is L-shaped, the bent outer part of the middle part of the self-locking wedge 71 is hinged with one end of a self-locking push rod 72, the other end of the self-locking push rod 72 is hinged with a self-locking swing rod 74, the middle part of the self-locking swing rod 74 is hinged with the derrick upper section 3, and the self-locking swing rod 74 is also connected with the derrick upper section 3 through a self-locking tension spring 73, so that the self;

the free end of the self-locking wedge 71 is provided with a wedge surface to allow the derrick upper section 3 to slide open during jacking and form a support during lowering. With the structure, when the derrick upper section 3 is jacked, the self-locking wedge 71 cannot interfere due to the existence of the wedge surface, and after the derrick upper section 3 is jacked in place, the upper section telescopic oil cylinder 305 is decompressed, and the derrick upper section 3 falls on the self-locking wedge 71 to form reliable support. In a preferable scheme, a rotating pin is further arranged and hinged with the derrick upper section 3, a hook head is arranged at the top end of the rotating pin, a pin is arranged on the self-locking wedge block 71, and the rotating pin is used for hooking the pin of the self-locking wedge block 71 when the self-locking wedge block 71 contracts, so that the position of the self-locking wedge block 71 is locked, and the derrick upper section 3 can be conveniently lowered.

In a preferred scheme, as shown in fig. 17, the anti-vibration device 4 is further arranged at the end positions of the lower derrick section 1 and the middle derrick section 2, the anti-vibration device 4 is located at a position close to the bottom truss, in the anti-vibration device 4, an anti-vibration cross beam 42 is slidably connected with the bottom truss, an anti-vibration wedge 41 for inserting between limiting rods is fixedly arranged on one side of the anti-vibration cross beam 42, the anti-vibration cross beam 42 is connected with the bottom truss through an anti-vibration tension spring 44, and a release cylinder 43 is arranged between the anti-vibration cross beam 42 and the bottom truss. By the structure, shaking among the lower derrick section 1, the middle derrick section 2 and the upper derrick section 3 can be avoided, the stability of the whole derrick is improved, and especially the influence of alternating stress generated by vibration on the whole derrick is reduced. In a default state, the anti-vibration wedge 41 is inserted between the lower derrick section 1 and the middle derrick section 2, or between the middle derrick section 2 and the upper derrick section 3, and when the derrick needs to be jacked up or retracted, the piston rod of the release cylinder 43 extends out, so that the anti-vibration wedge 41 is released.

In a preferred scheme, as shown in figures 3 and 4, the bottom of a derrick lower section 1 is hinged with a derrick foundation 5, and one side of the derrick lower section 1 is connected with a derrick inclined strut 10, so that the whole derrick is inclined by 3-8 degrees. In a preferred solution, the derrick is tilted 5 °. By the structure, the working space of the derrick is enlarged.

The preferable scheme is as shown in fig. 4, the whole derrick is connected with a guy rope assembly 13 to ensure the stability of the derrick;

in the preferred scheme as shown in fig. 2 and 12, a hanging bracket assembly 6 is arranged at the top of the derrick upper section 3; in the hanger assembly 6, a first guide wheel 62, a pulley block 63 and a second guide wheel 64 are arranged in a hanger 61 and used for installing a steel wire rope.

In a preferred solution, as shown in fig. 4, the sections 2 are provided with an operating platform 12 in the derrick.

Example 2:

on the basis of embodiment 1, as shown in fig. 1 to 3, a construction method of a stand-alone hydraulic telescopic derrick includes the following steps:

s1, mutually sleeving the lower derrick section 1, the middle derrick section 2 and the upper derrick section 3 and locking by the locking pin 16;

s2, transporting the derrick 1000 to a construction site by a transport vehicle;

s3, hoisting the derrick 1000 by the crane 1001 and pin-jointing the lower section 1 of the derrick with the derrick foundation 5;

in the preferred scheme, before the derrick 1000 is lifted, when the derrick 1000 is in the horizontal position, the hanging bracket assembly 6 is installed at the top of the derrick upper section 3;

an operating platform 12 is mounted in the derrick midsection 2. By the structure, the aerial operation is avoided, and the construction safety is further improved. Or in a horizontal state, the basic structure of the operation platform 12 is firstly installed to reduce the intensity of aerial work.

s4, the crane 1001 assists in lifting the derrick 1000 to a working position, and a guy rope is installed to reliably fix the derrick 1000;

in a preferred scheme, as shown in FIG. 2, in the process of lifting the derrick, at least one section of telescopic oil cylinder 1002 is detached from the derrick;

an inclined jacking foundation pit 1003 lower than the ground is arranged below the horizontal derrick 1000, one end of a telescopic oil cylinder 1002 is fixedly arranged on the jacking foundation pit 1003 through a winch base, the other end of the telescopic oil cylinder 1002 is connected with the derrick 1000 through the winch base, and a piston rod of the telescopic oil cylinder 1002 synchronously extends out in the hoisting process of the crane 1001; the telescopic oil cylinder 1002 is used for assisting lifting, and auxiliary lifting force can be provided, so that the requirement on the lifting tonnage of a crane is lowered, the construction equipment cost is reduced, and the problem that large construction equipment passes in mountainous roads is solved. And the telescopic oil cylinder 1002 can also provide auxiliary support for the derrick 1000 in the lifting process, so that the safety in the lifting process is greatly improved, and accidents caused by manual misoperation are avoided.

After lifting is completed, the telescopic cylinder 1002 is installed back to the derrick 1000.

s5, loosening the locking pins 16 of the lower derrick section 1, the middle derrick section 2 and the upper derrick section 3, connecting and starting a hydraulic station, starting the middle telescopic oil cylinder 206 to lift the middle derrick section 2 and the upper derrick section 3, and starting the locking pin device 9 to lock the position of the middle derrick section 2 after the middle derrick section 2 is in place;

starting an upper section telescopic oil cylinder 305 to lift the upper section 3 of the derrick to the position, and locking the position of the upper section 3 of the derrick through a self-locking device 7;

in the preferred embodiment, as shown in fig. 3, after the derrick 1000 is lifted to the right, the anti-vibration wedge 41 of the anti-vibration device 4 is inserted between the lower derrick section 1 and the middle derrick section 2, and between the middle derrick section 2 and the upper derrick section 3.

In the preferred scheme, one side of a derrick lower section 1 is connected with a derrick inclined strut 10, and the derrick 1000 is adjusted to incline by 3-8 degrees. With this structure, interference of the derrick 1000 with the working equipment can be reduced.

Through the steps, the derrick lifting construction is realized.

In a preferred scheme, when the derrick is retracted, the upper section telescopic oil cylinder 305 is started to retract the derrick upper section 3, the derrick upper section 3 is locked by the locking pin 16, then the middle section telescopic oil cylinder 206 is started to retract the derrick middle section 2 and the derrick upper section 3, the derrick middle section 2 is locked by the locking pin 16, the derrick 1000 is integrally lifted by the crane 1001, a guy rope is loosened, the position below the derrick 1000 is in a horizontal position, and the transportation support 15 is arranged below the derrick 1000, so that the derrick 1000 can be transported conveniently by a flat car. The derrick 1000 recovery operation is completed through the above steps.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. A construction method of an independent hydraulic telescopic derrick is characterized by comprising the following steps:

s1, mutually sleeving the lower derrick section (1), the middle derrick section (2) and the upper derrick section (3) and locking by a locking pin (16);

in the derrick (1000), a middle telescopic oil cylinder (206) is arranged between a lower derrick section (1) and a middle derrick section (2), and an upper telescopic oil cylinder (305) is arranged between the middle derrick section (2) and an upper derrick section (3);

the cross section of the derrick lower section (1) comprises two lower section side trusses (101) and a lower section bottom truss (103), and the lower section bottom truss (103) is fixedly connected with the end of the lower section side truss (101);

the cross section of the derrick middle section (2) comprises two middle section side trusses (203) and a middle section bottom truss (205), the middle section bottom truss (205) is fixedly connected with a position close to the end of the middle section side truss (203), the cross section of the derrick middle section (2) is H-shaped, and a middle section telescopic oil cylinder (206) is positioned between a lower section bottom truss (103) and the middle section bottom truss (205);

the cross section of the derrick upper section (3) comprises two upper section side trusses (302) and an upper section bottom truss (304), the upper section bottom truss (304) is fixedly connected with a position close to the end of the upper section side truss (302), the cross section of the derrick upper section (3) is H-shaped, and an upper section telescopic oil cylinder (305) is positioned between a middle section bottom truss (205) and the upper section telescopic oil cylinder (305);

s2, transporting the derrick (1000) to the construction site by a transport vehicle;

s3, hoisting the derrick (1000) by the crane (1001) and pin-jointing the lower section (1) of the derrick with the derrick foundation (5);

s4, the crane (1001) assists in lifting the derrick (1000) to a working position, and a guy rope is installed to reliably fix the derrick (1000);

s5, loosening the locking pin (16) of the lower derrick section (1), the middle derrick section (2) and the upper derrick section (3), connecting and starting the hydraulic station, starting the middle telescopic oil cylinder (206) to jack the middle derrick section (2) and the upper derrick section (3), and starting the locking pin device (9) to lock the position of the middle derrick section (2) after the middle derrick section (2) is in place;

starting an upper section telescopic oil cylinder (305) to lift the derrick upper section (3) to the position, and locking the position of the derrick upper section (3) through a self-locking device (7);

through the steps, the derrick lifting construction is realized.

2. The construction method of the freestanding hydraulic telescopic derrick according to claim 1, wherein: when the derrick is recovered, the upper section telescopic oil cylinder (305) is started to recover the derrick upper section (3) firstly, the derrick upper section (3) is locked by the locking pin (16), then the middle section telescopic oil cylinder (206) is started to recover the derrick middle section (2) and the derrick upper section (3), the derrick middle section (2) is locked by the locking pin (16), the derrick (1000) is lifted by the crane (1001) integrally, the guy rope is loosened, the lower part of the derrick (1000) is placed at a horizontal position, and the derrick (1000) recovery operation is completed through the steps.

3. The construction method of the freestanding hydraulic telescopic derrick according to claim 1, wherein: in step s4, in the process of raising the derrick, removing at least one telescopic cylinder (1002) from the derrick;

a jacking foundation pit (1003) is arranged below a horizontal derrick (1000), one end of a telescopic oil cylinder (1002) is fixedly arranged on the jacking foundation pit (1003) through a winch base, the other end of the telescopic oil cylinder (1002) is connected with the derrick (1000) through the winch base, and a piston rod of the telescopic oil cylinder (1002) synchronously extends out in the lifting process of a crane (1001);

and after lifting is finished, the telescopic oil cylinder (1002) is installed back to the derrick (1000).

4. The construction method of the freestanding hydraulic telescopic derrick according to claim 1, wherein: a lower-section bottom limiting rod (104) and a lower-section top limiting rod (105) are respectively arranged at two ends of the inner side of the lower-section side truss (101);

two ends of the middle section side truss (203) are respectively provided with a middle section bottom limiting rod (204) and a middle section top limiting rod (202), the lower section bottom limiting rod (104) is in sliding contact with the middle section bottom limiting rod (204), and the lower section top limiting rod (105) is in sliding contact with the middle section top limiting rod (202);

the inner free end of the middle-section side truss (203) is provided with a middle-section first limiting rod (201), the middle-section bottom truss (205) is provided with a middle-section second limiting rod (207), the two ends of the upper-section side truss (302) are respectively provided with an upper-section top limiting rod (301) and an upper-section bottom limiting rod (303), the middle-section first limiting rod (201) is in sliding contact with the upper-section top limiting rod (301), and the middle-section second limiting rod (207) is in sliding contact with the upper-section bottom limiting rod (303).

5. The construction method of the freestanding hydraulic telescopic derrick according to claim 1, wherein: an upper section telescopic oil cylinder (305) is arranged between the derrick middle section (2) and the derrick upper section (3), an oil cylinder guide device (8) is further arranged, in the oil cylinder guide device (8), two upper guide swing arms (81) are positioned on two sides of the upper section telescopic oil cylinder (305), the upper guide swing arms (81) are hinged with an upper guide swing seat (86) fixedly arranged on the derrick middle section (2), and the free ends of the upper guide swing arms (81) are provided with upper guide rings (83);

an upper guide tension spring (84) is arranged between the upper guide swing arm (81) and the derrick middle section (2);

an upper guide collision block (82) is arranged on the upper guide swing arm (81), an upper guide sliding rail (85) is fixedly arranged on the upper section (3) of the derrick, the upper guide sliding rail (85) is in sliding contact with the upper guide collision block (82), so that the upper guide swing arm (81) is in an open state in a partial stroke of jacking of the upper section (3) of the derrick, and an upper guide ring (83) is folded to hold the upper section telescopic oil cylinder (305) in the partial stroke;

two middle-section telescopic oil cylinders (206) are arranged between a derrick lower section (1) and a derrick middle section (2), and an oil cylinder guide device is also arranged, wherein a middle guide swing arm (801) positioned in the middle is hinged with a lower-section bottom truss (103) of the derrick lower section (1), middle side guide swing arms (803) positioned on two sides are hinged with a lower-section side truss (101) of the derrick lower section (1), and middle guide rings (802) are arranged at the free ends of the middle guide swing arms (801) and the middle side guide swing arms (803);

the middle guide swing arm (801) is connected with the lower derrick section (1) through a middle guide tension spring (805), and the middle guide swing arm (803) is connected with the lower derrick section (1) through a middle guide tension spring (804);

the derrick middle section (2) is also provided with a middle guide sliding rail (806), the middle guide sliding rail (806) is in sliding contact with the middle guide swinging arm (801) and the middle side guide swinging arm (803), so that the middle guide swinging arm (801) and the middle side guide swinging arm (803) are in an open state in a partial stroke of jacking of the derrick middle section (2), and the middle guide ring (802) is folded to embrace the middle section telescopic oil cylinder (206) in the partial stroke.

6. The construction method of the freestanding hydraulic telescopic derrick according to claim 1, wherein: a lock pin device (9) is arranged at a position, close to the top end, of the derrick lower section (1), in the lock pin device (9), a rotating pin seat (91) is fixedly connected with the derrick lower section (1), one end of a rotating pin (92) is hinged with the rotating pin seat (91), the rotating pin (92) is L-shaped, a protruding part (93) is arranged outside the middle bending part of the rotating pin (92), one end of a lock pin cylinder (94) is connected with the protruding part (93), the other end of the lock pin cylinder is fixedly connected with the derrick lower section (1), and when the lock pin cylinder (94) retracts, the free end of the rotating pin (92) extends into the derrick lower section (1);

a self-locking device (7) is arranged at a position, close to the bottom end, of the derrick upper section (3), in the self-locking device (7), one end of a self-locking wedge block (71) respectively positioned at two sides is hinged with the derrick upper section (3), the self-locking wedge block (71) is L-shaped, the bent outer part of the middle part of the self-locking wedge block (71) is hinged with one end of a self-locking push rod (72), the other end of the self-locking push rod (72) is hinged with a self-locking swing rod (74), the middle part of the self-locking swing rod (74) is hinged with the derrick upper section (3), and the self-locking swing rod (74) is also connected with the derrick upper section (3) through a self-locking tension spring (73) so that the self-locking wedge block (71) tends to be;

the free end of the self-locking wedge block (71) is provided with a wedge surface, so that the derrick upper section (3) can slide away in the jacking process and form support in the falling process.

7. A construction method of a freestanding hydraulic telescopic derrick according to any one of claims 1 and 5 to 6, wherein: the anti-vibration device is characterized in that anti-vibration devices (4) are further arranged at the end positions of the lower derrick section (1) and the middle derrick section (2), the anti-vibration devices (4) are located at positions close to the bottom truss, in the anti-vibration devices (4), anti-vibration cross beams (42) are in sliding connection with the bottom truss, anti-vibration wedge blocks (41) used for being inserted between limiting rods are fixedly arranged on one sides of the anti-vibration cross beams (42), the anti-vibration cross beams (42) are connected with the bottom truss through anti-vibration tension springs (44), and disengaging cylinders (43) are arranged between the anti-vibration cross beams (42) and the bottom truss;

after the derrick (1000) is lifted to the right, the anti-vibration wedge block (41) of the anti-vibration device (4) is inserted between the lower derrick section (1) and the middle derrick section (2) and between the middle derrick section (2) and the upper derrick section (3).

8. The construction method of the freestanding hydraulic telescopic derrick according to claim 1, wherein: one side of the derrick lower section (1) is connected with a derrick inclined strut (10) to adjust the inclination of the derrick (1000) to 3-8 degrees.

9. A method of constructing a freestanding hydraulic telescopic mast as claimed in claim 1 or 2, wherein: before the derrick (1000) is lifted, when the derrick (1000) is in a horizontal position, a hanging bracket assembly (6) is installed at the top of the derrick upper section (3);

an operation platform (12) is arranged on the derrick middle section (2).