CN221347467U - Ultra-long stable prop-up oil cylinder - Google Patents

Abstract

The utility model discloses an ultra-long stable supporting cylinder which comprises a cylinder barrel, a piston rod, a cylinder bottom, a cylinder cover, a piston, a first oil hole, a second oil hole, a jacking mechanism and a locking mechanism, wherein the cylinder barrel is vertically arranged, the piston rod is installed in the cylinder barrel and can move upwards or downwards relative to the cylinder barrel, the piston is sleeved on the tail end side of the lower end of the piston rod, the cylinder cover is installed at the upper end of the cylinder barrel, the cylinder bottom is installed at the lower end of the cylinder barrel, the first oil hole penetrates through the cylinder bottom and is communicated with the interior of the cylinder barrel and is used for enabling power oil to enter between the cylinder barrel and the piston to push the piston to move upwards relative to the cylinder barrel, the second oil hole penetrates through the cylinder barrel at the lower end of the cylinder cover, the jacking mechanism is connected to the tail end side of the upper end of the piston rod and sequentially comprises a first bearing part, a second bearing part, a third bearing part and a jacking head, and the shapes of the first bearing part, the second bearing part and the third bearing part are matched with the piston rod. The utility model has the advantages of simple structure, long-time stability, high running stability, high precision and high safety.

Description

Ultra-long stable prop-up oil cylinder

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to an ultra-long stable prop-top oil cylinder.

Background

A hydraulic cylinder (also referred to as an oil cylinder) is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between two sides of the effective area of the piston; the hydraulic cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffer device and an exhaust device. The device can be divided into linear reciprocating motion type and rotary swing type according to the motion mode; the working principle of the hydraulic cylinder doing linear reciprocating motion is as follows: by utilizing the two one-way valves, after the hydraulic cylinder reaches the end point, the lower part of the one-way valve is communicated with the other oil inlet pipe, and oil is turned to the other oil inlet pipe to push the oil cylinder. Because the two one-way valves are communicated, the labor is saved in any aspect, and the oil flows into any oil pipe until the hydraulic pressure at the two ends is balanced.

The supporting oil cylinder is equipment for supporting and stabilizing heavy objects, and is commonly used in the fields of engineering construction, stage construction, mechanical maintenance and the like. In engineering construction, the supporting oil cylinder can be used for supporting and stabilizing important structures such as buildings, bridges, tunnels and the like, so that safety and stability of the supporting oil cylinder are ensured; in activities such as performance and concert, the supporting oil cylinder can be used for building equipment such as a stage, supporting lamplight and sound equipment, and stability and safety of the stage are guaranteed; in the mechanical equipment maintenance and installation process, the supporting oil cylinder can be used for temporarily supporting and fixing equipment, so that maintenance personnel can conveniently operate and maintain the equipment; in the process of ship maintenance and disassembly, the supporting oil cylinder can be used for supporting and fixing the ship body, so that the safety of maintenance personnel and the smooth operation of the maintenance personnel are ensured.

In the prior art, in the process of supporting and stabilizing a heavy object, the bearing capacity of the supporting oil cylinder exceeds the maximum load due to the non-encountered external pressure, or the stability is poor due to long-time supporting, and the safety of the supporting oil cylinder cannot be ensured due to the fact that the supporting oil cylinder cannot be fastened for an ultra-long time; in the prior art, stability and precision of the propping cylinder in the propping process are not always guaranteed because the propping cylinder has a severe use environment.

In summary, there is a need in the market for a very long and stable prop ram that meets the market demands, is stable for a long time, has high operation stability, high precision, and high safety.

Disclosure of utility model

According to the defects of the prior art, the utility model provides the ultra-long stable prop-top oil cylinder which is simple in structure, high in operation stability, high in precision, good in safety and durability and convenient to install and replace.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides an overlength firm prop up hydro-cylinder, includes cylinder, piston rod, cylinder bottom, cylinder cap, piston, first oilhole, second oilhole, climbing mechanism and locking mechanism, the cylinder is vertical to be set up, and the piston rod is installed in the cylinder to can upwards or down move for the cylinder, the piston cup joints in the lower extreme terminal side of piston rod, the cylinder cap is installed to the upper end of cylinder, the cylinder bottom is installed to the lower extreme of cylinder, first oilhole runs through the cylinder bottom and is linked together with the cylinder is inside, be used for power oil to get into between cylinder and the piston, promote the piston and upwards move for the cylinder, the second oilhole wears to locate on the cylinder of cylinder bottom for power oil gets into the cylinder inner circumference, promote the piston and upwards move for the cylinder, climbing mechanism connects in the upper end terminal side of piston rod, the locking mechanism is used for locking the piston rod when the piston moves upwards to cling to the lower end of the cylinder cover, the locking sleeve is positioned at the upper end of the cylinder barrel and sleeved on the periphery of the first bearing part, a plurality of locking screw holes which are transversely arranged through the locking sleeve are uniformly distributed at the lower end of the middle part of the locking sleeve, the locking screw holes are matched with the locking screw holes, the locking screw holes also comprise a plurality of locking holes, the plurality of locking screws can extend inwards to the side end surface of the first bearing part relative to the locking screw holes so as to fix the first bearing part to prevent the first bearing part from sliding downwards relative to the locking sleeve, or retract outwards relative to the locking screw holes so as to be far away from the first bearing part, and the locking screws, the locking screw holes and the first bearing part are mutually matched to lock or move the piston rod.

As a further illustration of the utility model:

Preferably, the upper end terminal side of cylinder is equipped with the fixed establishment of fixed cylinder, fixed establishment includes flange and strengthens the band, flange locates the periphery of the upper end terminal side of cylinder, and the lock sleeve is installed in flange's upper end, and flange periphery is equipped with a plurality of evenly distributed's fixed through-hole, and fixed through-hole is used for being fixed mutually with outside fixed part to vertical fixing the cylinder, strengthen band shape and cylinder assorted, locate the cylinder periphery of flange downside, in order to strengthen the intensity and the rigidity of cylinder, flange, strengthen band and cylinder structure as an organic whole.

Preferably, the first oil hole and the second oil hole have the same diameter and are communicated through an external oil pipe for the inlet and outlet of power oil.

Preferably, a first sealing device is arranged between the inner periphery of the cylinder cover and the piston rod, a second sealing device is arranged between the outer periphery of the cylinder cover and the piston rod, the second sealing device and the first sealing device are mutually matched to prevent power oil from overflowing and external impurities from entering the cylinder barrel, a third sealing device is arranged between the outer periphery of the piston and the cylinder barrel, a fourth sealing device is arranged between the inner periphery of the piston and the piston rod, and the fourth sealing device and the third sealing device are mutually matched to prevent power oil from leaking through the piston when the piston moves.

Preferably, the first sealing device comprises a first piston rod guide sleeve, a first sealing ring, a second sealing ring, a piston rod supporting ring, a second piston rod guide sleeve, a third sealing ring and a first dustproof sealing ring from bottom to top in sequence, the second sealing device comprises a second dustproof sealing ring and a third dustproof sealing ring which are uniformly arranged at the lower end of the middle part of the cylinder cover from top to bottom in sequence, the first piston rod guide sleeve, the second piston rod guide sleeve and the piston rod supporting ring are mutually matched to guide the piston rod to move downwards and upwards relative to the cylinder barrel, the first sealing ring, the second sealing ring and the third sealing ring are Y-shaped sealing rings, the first dustproof sealing ring, the second dustproof sealing ring and the third dustproof sealing ring are O-shaped dustproof sealing rings, the first sealing ring, the second sealing ring, the third sealing ring, the first dustproof sealing ring, the second dustproof sealing ring and the third dustproof sealing ring are mutually matched to prevent power oil from overflowing and external impurities from entering the inside the cylinder barrel, the third sealing device comprises a first piston guide ring, a fourth sealing ring, a fifth sealing ring and a second piston guide ring from bottom to top in sequence, the first piston guide ring and the second piston guide ring are used to be used for supporting and guiding the piston to move downwards relative to the cylinder barrel, the first sealing ring and the seventh sealing ring is mutually matched to the seventh sealing ring and the fourth sealing ring is arranged at the upper end of the top to the top of the cylinder barrel, and the seventh sealing ring is matched to the top to the fourth sealing ring and the seventh sealing ring is used for sealing ring to move downwards and the top to the sealing device.

Preferably, the lower extreme of piston rod is equipped with piston installation department, and the piston is installed in the periphery of piston installation department, piston installation department shape and piston rod phase-match are axisymmetric distribution and diameter less than the diameter of piston rod with the piston rod, the middle part upper end of piston installation department is equipped with two sunken anti-skidding lines, and sixth sealing washer and seventh sealing washer are installed in anti-skidding line.

Preferably, the jacking head of the jacking mechanism comprises a jacking bearing part and a jacking raised head, the jacking bearing part is connected to the upper end of the third bearing part, the shape of the jacking bearing part is matched with that of the second bearing part, the diameter of the jacking raised head is the same, the vertical section of the jacking raised head is arc-shaped, the jacking bearing part, the third bearing part, the second bearing part and the first bearing part are of an integrated structure, the lower end of an external part to be jacked is provided with a containing space with an inwards concave shape matched with the jacking head, the lower end of the containing space is provided with a fastening mechanism, the external part to be jacked is sleeved on the peripheries of the jacking raised head, the jacking bearing part and the third bearing part, and is fixed with the third bearing part through the fastening mechanism, so that the jacking head is driven to jack the external part to be jacked upwards when the piston rod moves upwards.

Preferably, the inner circumference of the lower end of the middle part of the locking sleeve is recessed inwards to form a locking gap, the locking screw penetrates through the locking gap to fix or keep away from the first bearing part, when the piston moves upwards to be clung to the lower end of the cylinder cover, the lower end face of the first bearing part moves to the upper end of the locking screw hole, and the locking screw can penetrate through the locking gap and extend inwards to the lower side of the lower end face of the first bearing part to prevent the first bearing part from sliding downwards relative to the locking sleeve.

Preferably, the diameter of the outer periphery of the cylinder barrel is 605.0 mm-645.0 mm, the diameter of the inner periphery of the cylinder barrel is 480.0 mm-520.0 mm, the diameter of the piston rod is 300.0 mm-340.0 mm, the thickness of the fixing flange is 180.0 mm-220.0 mm, the length from the hole center of the locking screw hole to the tail end side of the lower end of the locking sleeve is 191.0 mm-211.0 mm, the aperture of the locking screw hole is 45.0-55.0 mm, the diameter of the outer periphery of the locking sleeve is 880.0 mm-920.0 mm, the diameter of the first bearing part is 540.0 mm-580.0 mm, the diameter of the second bearing part is 480.0 mm-520.0 mm, the height of the second bearing part is 110.0 mm-120.0 mm, the working stroke of the piston is 300.0 mm-340.0 mm, the working pressure is 26 MPa-30 MPa, and the test pressure is 32 MPa-36 MPa.

Preferably, the cylinder bottom is welded at the lower end of the cylinder barrel, and the cylinder cover is fixed at the upper end of the cylinder barrel through a plurality of hexagon socket head cap bolts uniformly distributed at the periphery of the cylinder barrel.

The beneficial effects of the utility model are as follows:

The lifting mechanism is connected to the tail end of the upper end of the piston rod, the lifting mechanism sequentially comprises a first bearing part, a second bearing part, a third bearing part and a lifting head from bottom to top, the shapes of the first bearing part, the second bearing part and the third bearing part are all matched with the piston rod, the diameters of the first bearing part, the second bearing part and the third bearing part are gradually reduced in an axisymmetric distribution manner, the diameter of the third bearing part is larger than that of the piston rod, the lifting head comprises a lifting bearing part and a lifting raised head, the lifting bearing part is connected to the upper end of the third bearing part, the shape of the lifting bearing part is matched with that of the second bearing part, the vertical section of the lifting raised head is arc-shaped, the lifting raised head, the lifting bearing part, the third bearing part, the second bearing part and the first bearing part are of an integrated structure, the lower end of an external part to be lifted is provided with a containing space with inwards concave shapes matched with the lifting head, the lower end of the containing space is provided with a fastening mechanism, the external part to be lifted is sleeved on the lifting raised head, the lifting raised part and the lifting raised part is enabled to be uniformly distributed with the lifting bearing part in the circumferential direction, and the lifting process can be stably lifted by the lifting process through the lifting bearing part and the third bearing part.

The locking mechanism is used for locking the piston rod when the piston moves upwards to cling to the lower end of the cylinder cover, and comprises a locking sleeve and locking screws, wherein the locking sleeve is positioned at the upper end of the cylinder barrel and sleeved on the periphery of the first bearing part, a plurality of locking screw holes which are transversely arranged through the locking sleeve are uniformly distributed at the lower end of the middle part of the locking sleeve, the locking screws and the locking screw holes are matched, the locking screws also comprise a plurality of locking screw holes, the plurality of locking screw holes can extend inwards to the side end surface of the first bearing part relative to the locking screw holes so as to fix the first bearing part to prevent the first bearing part from sliding downwards relative to the locking sleeve, or retract outwards relative to the locking screw holes so as to be far away from the first bearing part, the locking screw holes and the first bearing part are mutually matched so as to lock or move the piston rod, when the piston moves upwards to cling to the lower end of the cylinder cover, the locking screw holes can penetrate through a locking clearance and extend inwards to the lower side of the lower end surface of the first bearing part, the locking screw holes relative to the locking sleeve is prevented from sliding downwards, the first bearing part relative to the locking sleeve, the defect that the prior art cannot ensure poor stability due to long-time supporting and fastening, the locking screw holes cannot be guaranteed for long time, and the locking screw holes cannot be mutually matched with the locking screw holes can not be achieved, and the locking screw is achieved, and the locking screw has the high safety.

And a fourth sealing device is arranged between the inner periphery of the piston and the piston rod, and is mutually matched with the third sealing device so as to prevent the power oil from leaking out and the external impurities from entering the cylinder barrel.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

Fig. 3 is a schematic view of the bottom structure of the present utility model.

Fig. 4 is a schematic view of the piston rod and the jacking mechanism of the present utility model.

Fig. 5 is a cross-sectional view of the locking mechanism of the present utility model.

Fig. 6 is an enlarged schematic view of the portion B in fig. 1.

In the figure: 1. a cylinder; 2. a piston rod; 3. a cylinder bottom; 4. a cylinder cover; 5. a piston; 6. a first oil hole; 7. a second oil hole; 8. a first carrying part; 9. a second carrying part; 10. a third carrying part; 11. lifting the bearing part; 12. jacking the raised head; 13. a locking sleeve; 14. locking the screw hole; 15. a fixed flange; 16. reinforcing the ferrule; 17. a fixing through hole; 18. an external oil pipe; 19. a first piston rod guide sleeve; 20. a first seal ring; 21. a second seal ring; 22. a piston rod support ring; 23. a second piston rod guide sleeve; 24. a third seal ring; 25. a first dust seal ring; 26. a second dust seal ring; 27. a third dustproof sealing ring; 28. a first piston guide ring; 29. a fourth seal ring; 30. a fifth seal ring; 31. a second piston guide ring; 32. a sixth seal ring; 33. a seventh seal ring; 34. a piston mounting portion; 35. anti-skid lines; 36. a member to be lifted; 37. a fastening mechanism; 38. locking the gap.

Detailed Description

The structural and operational principles of the present utility model will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 to 6, the utility model relates to an ultra-long stable propping cylinder, which comprises a cylinder 1, a piston rod 2, a cylinder bottom 3, a cylinder cover 4, a piston 5, a first oil hole 6, a second oil hole 7, a jacking mechanism and a locking mechanism, wherein the cylinder 1 is vertically arranged, the piston rod 2 is arranged in the cylinder 1 and can move upwards or downwards relative to the cylinder 1, the piston 5 is sheathed at the lower end side of the piston rod 2, the cylinder cover 4 is arranged at the upper end of the cylinder 1, the cylinder bottom 3 is arranged at the lower end of the cylinder 1, the first oil hole 6 penetrates through the cylinder bottom 3 and is communicated with the inside of the cylinder 1 for power oil to enter between the cylinder 1 and the piston 5, the piston 5 is pushed to move upwards relative to the cylinder 1, the second oil hole 7 penetrates through the cylinder 1 at the lower end of the cylinder cover 4 for power oil to enter the inner periphery of the cylinder 1, the piston 5 is pushed to move downwards relative to the cylinder 1, the jacking mechanism is connected to the upper end of the piston rod 2 and comprises a first bearing part 8, a second bearing part 9, a third bearing part 10 and a jacking head from bottom to top in sequence, the shapes of the first bearing part 8, the second bearing part 9 and the third bearing part 10 are matched with the piston rod 2, the diameters of the first bearing part 8, the second bearing part 9 and the third bearing part 10 are distributed axisymmetrically and gradually decrease, the diameter of the third bearing part 10 is larger than the diameter of the piston rod 2, the jacking head is used for connecting an external part 36 to be jacked, the jacking head is driven to jack the external part 36 to be jacked when the piston rod 2 moves upwards, the locking mechanism is used for locking the piston rod 2 when the piston 5 moves upwards to be clung to the lower end of the cylinder cover 4, the locking mechanism comprises a locking sleeve 13 and locking screws (not shown in the drawing), the locking sleeve 13 is positioned at the upper end of the cylinder 1 and sleeved on the periphery of the first bearing part 8, the lower end of the middle part of the locking sleeve 13 is uniformly provided with a plurality of locking screw holes 14 which are transversely arranged through the locking sleeve 13, the locking screw holes 14 are matched with each other, the locking screw holes are also multiple, the locking screw holes can inwards extend to the side end face of the first bearing part 8 relative to the locking screw holes 14 so as to fix the first bearing part 8 to prevent the first bearing part 8 from sliding downwards relative to the locking sleeve 13, or outwards retreating relative to the locking screw holes 14 so as to be far away from the first bearing part 8, and the locking screw holes, the locking screw holes 14 and the first bearing part 8 are mutually matched to lock or move the piston rod 2.

As shown in fig. 1, 2 and 3, the upper end of the cylinder 1 is provided with a fixing mechanism for fixing the cylinder 1, the fixing mechanism comprises a fixing flange 15 and a reinforcing hoop 16, the fixing flange 15 is arranged on the periphery of the upper end of the cylinder 1, the locking sleeve 13 is mounted on the upper end of the fixing flange 15, a plurality of uniformly distributed fixing through holes 17 are formed in the periphery of the fixing flange 15, the fixing through holes 17 are used for being fixed with external fixing components so as to vertically fix the cylinder 1, the reinforcing hoop 16 is matched with the cylinder 1 in shape and is arranged on the periphery of the cylinder 1 at the lower side of the fixing flange 15 so as to strengthen the strength and rigidity of the cylinder 1, and the fixing flange 15, the reinforcing hoop 16 and the cylinder 1 are of an integral structure, so that the strength of the cylinder 1 in the operation process is further ensured.

As shown in fig. 1, the first oil hole 6 and the second oil hole 7 have the same diameter and are communicated with each other through an external oil pipe 18 for power oil to enter and exit.

As shown in fig. 1, 2 and 6, a first sealing device is arranged between the inner periphery of the cylinder cover 4 and the piston rod 2, a second sealing device is arranged between the outer periphery of the cylinder cover 4 and the piston rod 2, the second sealing device and the first sealing device are mutually matched to prevent the power oil from overflowing and the external impurities from entering the cylinder 1, a third sealing device is arranged between the outer periphery of the piston 5 and the cylinder 1, a fourth sealing device is arranged between the inner periphery of the piston 5 and the piston rod 2, and the fourth sealing device and the third sealing device are mutually matched to prevent the power oil from leaking through the piston 5 when the piston 5 moves. Further, the first sealing device sequentially comprises a first piston rod guide sleeve 19, a first sealing ring 20, a second sealing ring 21, a piston rod supporting ring 22, a second piston rod guide sleeve 23, a third sealing ring 24 and a first dustproof sealing ring 25 from bottom to top, the second sealing device comprises a second dustproof sealing ring 26 and a third dustproof sealing ring 27 which are uniformly arranged at the lower end of the middle part of the cylinder cover 4 from top to bottom in sequence, the first piston rod guide sleeve 19, the second piston rod guide sleeve 23 and the piston rod supporting ring 22 are mutually matched to guide the piston rod 2 to move downwards and upwards relative to the cylinder barrel 1, the first sealing ring 20, the second sealing ring 21 and the third sealing ring 24 are Y-shaped sealing rings, the first dustproof sealing ring 25, the second dustproof sealing ring 26 and the third dustproof sealing ring 27 are O-shaped dustproof sealing rings, the first sealing ring 20, the second sealing ring 21, the third sealing ring 24, the first dustproof sealing ring 25, the second dustproof sealing ring 26 and the third dustproof sealing ring 27 are mutually matched and used for preventing power oil from overflowing and external impurities from entering the cylinder barrel 1, the third sealing device sequentially comprises a first piston guide ring 28, a fourth sealing ring 29, a fifth sealing ring 30 and a second piston guide ring 31 from bottom to top, the first piston guide ring 28 and the second piston guide ring 31 are used for supporting and guiding the piston 5 to move downwards relative to the cylinder barrel 1, the fourth sealing ring 29 and the fifth sealing ring 30 are gray rings, the fourth sealing device comprises a sixth sealing ring 32 and a seventh sealing ring 33 which are uniformly distributed at the upper end of the middle part of the piston 5 and sequentially arranged from bottom to top, the sixth sealing ring 32 and the seventh sealing ring 33 are O-shaped sealing rings, and the fourth sealing ring 29, the fifth sealing ring 30, the sixth seal 32 and the seventh seal 33 cooperate with each other to prevent leakage of power oil via the piston 5 when the piston 5 moves.

As shown in fig. 6, a piston mounting portion 34 is disposed at the lower end of the piston rod 2, the piston 5 is mounted on the outer periphery of the piston mounting portion 34, the shape of the piston mounting portion 34 is matched with that of the piston rod 2, the piston mounting portion is axisymmetrically distributed with the piston rod 2, the diameter of the piston mounting portion is smaller than that of the piston rod 2, two concave anti-skid lines 35 are disposed at the upper end of the middle portion of the piston mounting portion 34, and the sixth sealing ring 32 and the seventh sealing ring 33 are mounted in the anti-skid lines 35.

As shown in fig. 1 and fig. 4, the jacking head of the jacking mechanism comprises a jacking bearing part 11 and a jacking raised head 12, the jacking bearing part 11 is connected to the upper end of the third bearing part 10, the shape of the jacking bearing part 11 is matched with that of the second bearing part 9, the diameter of the jacking bearing part is the same, the vertical section of the jacking raised head 12 is arc-shaped, the jacking raised head 12, the jacking bearing part 11, the third bearing part 10, the second bearing part 9 and the first bearing part 8 are of an integral structure, an accommodating space with an inward concave shape matched with the jacking head is arranged at the lower end of an external part to be jacked 36, a fastening mechanism 37 is arranged at the lower end of the accommodating space, the external part to be jacked 36 is sleeved on the peripheries of the jacking raised head 12, the jacking bearing part 11 and the third bearing part 10, and is fixed with the third bearing part 10 through the fastening mechanism 37, so that the jacking head is driven to jack the external part to be jacked upwards when the piston rod 2 moves upwards.

As shown in fig. 1-2, the inner circumference of the lower end of the middle portion of the locking sleeve 13 is recessed inwards to form a locking gap 38, a locking screw passes through the locking gap 38 to fix or keep away from the first bearing portion 8, when the piston 5 moves upwards to be close to the lower end of the cylinder cover 4, the lower end surface of the first bearing portion 8 moves to the upper end of the locking screw hole 14, and the locking screw can pass through the locking gap 38 and extend inwards to the lower side of the lower end surface of the first bearing portion 8, so that the first bearing portion 8 is prevented from sliding downwards relative to the locking sleeve 13.

Further, the diameter of the outer periphery of the cylinder barrel 1 is 605.0 mm-645.0 mm, the diameter of the inner periphery of the cylinder barrel 1 is 480.0 mm-520.0 mm, the diameter of the piston rod 2 is 300.0 mm-340.0 mm, the thickness of the fixing flange 15 is 180.0 mm-220.0 mm, the length from the hole center of the locking screw hole 14 to the tail end side of the lower end of the locking sleeve 13 is 191.0 mm-211.0 mm, the aperture of the locking screw hole 14 is 45.0-55.0 mm, the diameter of the outer periphery of the locking sleeve 13 is 880.0 mm-920.0 mm, the diameter of the first bearing part 8 is 540.0 mm-580.0 mm, the diameter of the second bearing part 9 is 480.0 mm-520.0 mm, the height of the second bearing part 9 is 110.0 mm-120.0 mm, the working stroke of the piston 5 is 300.0 mm-340.0 mm, the working pressure is 26 MPa-30 MPa, and the test pressure is 32 MPa-36 MPa. In this embodiment, the diameter of the outer circumference of the cylinder 1 is 625.0mm, the diameter of the inner circumference of the cylinder 1 is 500.0mm, the diameter of the piston rod 2 is 320.0mm, the thickness of the fixing flange 15 is 200.0mm, the length from the hole center of the locking screw hole 14 to the tail end side of the lower end of the locking sleeve 13 is 201.0mm, the aperture of the locking screw hole 14 is 50.0mm, the diameter of the outer circumference of the locking sleeve 13 is 900.0mm, the diameter of the first bearing part 8 is 560.0mm, the diameter of the second bearing part 9 is 500.0mm, the height of the second bearing part 9 is 115.0mm, the working stroke of the piston 5 is 320.0mm, the working pressure is 28MPa, and the test pressure is 32 MPa-36 MPa.

Further, the bottom 3 is welded to the lower end of the cylinder 1, and the head 4 is fixed to the upper end of the cylinder 1 by a plurality of hexagon socket bolts (not shown) uniformly distributed on the outer periphery of the cylinder 1.

The embodiments described by referring to the drawings are exemplary and intended to be illustrative of the application and are not to be construed as limiting the application. In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "lower", "upper", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.

In the foregoing, only the preferred embodiment of the present utility model is described, and any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical solutions of the present utility model fall within the scope of the technical solutions of the present utility model.

Claims (10)

1. An overlength firm prop up top hydro-cylinder, its characterized in that: comprises a cylinder barrel, a piston rod, a cylinder bottom, a cylinder cover, a piston, a first oil hole, a second oil hole, a jacking mechanism and a locking mechanism, wherein the cylinder barrel is vertically arranged, the piston rod is installed in the cylinder barrel and can move upwards or downwards relative to the cylinder barrel, the piston is sleeved on the tail end of the lower end of the piston rod, the cylinder cover is installed at the upper end of the cylinder barrel, the cylinder bottom is installed at the lower end of the cylinder barrel, the first oil hole penetrates through the cylinder bottom and is communicated with the inside of the cylinder barrel and is used for enabling power oil to enter between the cylinder barrel and the piston, the pushing piston moves upwards relative to the cylinder barrel, the second oil hole penetrates through the cylinder barrel at the lower end of the cylinder cover and is used for enabling the power oil to enter the inner periphery of the cylinder barrel and pushing the piston to move downwards relative to the cylinder barrel, the jacking mechanism is connected to the tail end of the upper end of the piston rod and sequentially comprises a first bearing part, a second bearing part, a third bearing part and a jacking head from bottom to top, the shape of the first bearing part, the second bearing part and the third bearing part are matched with the piston rod, the diameters of the first bearing part, the second bearing part and the third bearing part are distributed axisymmetrically and gradually decrease, the diameter of the third bearing part is larger than the diameter of the piston rod, the jacking head is used for connecting an external part to be jacked, the jacking head is driven to jack the external part to be jacked when the piston rod moves upwards, the locking mechanism is used for locking the piston rod when the piston moves upwards to cling to the lower end of the cylinder cover, the locking mechanism comprises a locking sleeve and a locking screw, the locking sleeve is positioned at the upper end of the cylinder barrel and sleeved on the periphery of the first bearing part, a plurality of locking screw holes which penetrate through the locking sleeve and are transversely arranged are uniformly distributed at the lower end of the middle part of the locking sleeve, the locking screw and the locking screw holes are matched also comprise a plurality of locking screw holes, the plurality of locking screw holes can inwards extend to the side end faces of the first bearing part relative to the locking screw holes so as to fix the first bearing part and prevent the first bearing part from sliding downwards relative to the locking sleeve, or retreats outwards relative to the locking screw hole to be far away from the first bearing part, and the locking screw, the locking screw hole and the first bearing part are mutually matched to lock or move the piston rod.

2. The ultra-long stable top cylinder according to claim 1, wherein: the upper end terminal side of cylinder is equipped with the fixed establishment of fixed cylinder, fixed establishment includes flange and strengthens the band, flange locates the periphery of the upper end terminal side of cylinder, and the lock sleeve is installed in flange's upper end, and flange periphery is equipped with a plurality of evenly distributed's fixed through-hole, and fixed through-hole is used for being fixed mutually with outside fixed part to vertical fixing the cylinder, strengthen band shape and cylinder assorted, locate the cylinder periphery of flange downside to strengthen the intensity and the rigidity of cylinder, flange, strengthen band and cylinder structure as an organic whole.

3. The ultra-long stable top cylinder according to claim 2, wherein: the first oil hole and the second oil hole have the same diameter and are communicated through an external oil pipe for power oil to enter and exit.

4. The ultra-long stable top ram of claim 3, wherein: the cylinder cover is characterized in that a first sealing device is arranged between the inner periphery of the cylinder cover and the piston rod, a second sealing device is arranged between the outer periphery of the cylinder cover and the piston rod, the second sealing device and the first sealing device are mutually matched to prevent power oil from overflowing and external impurities from entering the cylinder barrel, a third sealing device is arranged between the outer periphery of the piston and the cylinder barrel, a fourth sealing device is arranged between the inner periphery of the piston and the piston rod, and the fourth sealing device and the third sealing device are mutually matched to prevent power oil from leaking through the piston when the piston moves.

5. The ultra-long stable top cylinder according to claim 4, wherein: the first sealing device comprises a first piston rod guide sleeve, a first sealing ring, a second sealing ring, a piston rod supporting ring, a second piston rod guide sleeve, a third sealing ring and a first dustproof sealing ring from bottom to top in sequence, the second sealing device comprises a second dustproof sealing ring and a third dustproof sealing ring which are uniformly arranged at the middle lower end of a cylinder cover from top to bottom in sequence, the first piston rod guide sleeve, the second piston rod guide sleeve and the piston rod supporting ring are mutually matched and used for guiding a piston rod to move downwards and upwards relative to a cylinder barrel, the first sealing ring, the second sealing ring and the third sealing ring are Y-shaped sealing rings, the first dustproof sealing ring, the second dustproof sealing ring and the third dustproof sealing ring are O-shaped dustproof sealing rings, the first sealing ring, the second sealing ring, the third sealing ring, the first dustproof sealing ring, the second sealing ring and the third dustproof sealing ring are mutually matched and used for preventing power oil from overflowing and external impurities from entering the inside of the cylinder barrel, the third sealing device comprises a first piston guide ring, a fourth sealing ring, a fifth sealing ring and a second piston guide ring from bottom to top in sequence, the first piston guide ring and the second piston guide ring are used for supporting and guiding the piston to move downwards relative to the upper part, the first sealing ring, the second sealing ring and the third sealing ring are respectively arranged at the top and the top of the seventh sealing ring and the seventh sealing ring are mutually matched and the sixth sealing ring, and the sealing device are used for preventing leakage from the top to the top.

6. The ultra-long stable top cylinder according to claim 5, wherein: the lower extreme of piston rod is equipped with piston installation department, and the piston is installed in the periphery of piston installation department, piston installation department shape and piston rod phase-match are axisymmetric distribution and diameter less than the diameter of piston rod with the piston rod, the middle part upper end of piston installation department is equipped with two sunken anti-skidding lines, and sixth sealing washer and seventh sealing washer are installed in anti-skidding line.

7. The ultra-long stable top cylinder according to claim 6, wherein: the jacking head of the jacking mechanism comprises a jacking bearing part and a jacking raised head, the jacking bearing part is connected to the upper end of the third bearing part, the shape of the jacking bearing part is matched with that of the second bearing part, the diameter of the jacking raised head is identical, the vertical section of the jacking raised head is arc-shaped, the jacking raised head, the jacking bearing part, the third bearing part, the second bearing part and the first bearing part are of an integrated structure, the lower end of an external part to be jacked is provided with a containing space with an inwards concave shape matched with the jacking head, the lower end of the containing space is provided with a fastening mechanism, the external part to be jacked is sleeved on the peripheries of the jacking raised head, the jacking bearing part and the third bearing part, and the jacking raised head is driven to jack the external part to be jacked upwards when a piston rod moves upwards through the fastening mechanism.

8. The ultra-long stable top cylinder according to claim 7, wherein: the inner circumference of lock sleeve middle part lower extreme inwards caves in and forms the locking clearance, and locking screw passes the locking clearance and fixes or keep away from first carrier part, and when the piston upwards moved to hugging closely the cylinder cap lower extreme, the lower terminal surface of first carrier part moved to the upper end of locking screw, locking screw can pass the locking clearance and inwards extend to the downside of first carrier part lower extreme face, prevents that first carrier part from sliding down for the lock sleeve.

9. The ultra-long stable top cylinder according to claim 8, wherein: the diameter of the outer periphery of the cylinder barrel is 605.0 mm-645.0 mm, the diameter of the inner periphery of the cylinder barrel is 480.0 mm-520.0 mm, the diameter of a piston rod is 300.0 mm-340.0 mm, the thickness of the fixing flange is 180.0 mm-220.0 mm, the length from the hole center of the locking screw hole to the tail end side of the lower end of the locking sleeve is 191.0 mm-211.0 mm, the aperture of the locking screw hole is 45.0-55.0 mm, the diameter of the outer periphery of the locking sleeve is 880.0 mm-920.0 mm, the diameter of the first bearing part is 540.0 mm-580.0 mm, the diameter of the second bearing part is 480.0 mm-520.0 mm, the height of the second bearing part is 110.0 mm-120.0 mm, the working stroke of the piston is 300.0 mm-340.0 mm, the working pressure is 26 MPa-30 MPa, and the test pressure is 32 MPa-36 MPa.

10. The ultra-long stable top cylinder according to any one of claims 1 to 9, wherein: the cylinder bottom is welded at the lower end of the cylinder barrel, and the cylinder cover is fixed at the upper end of the cylinder barrel through a plurality of hexagon socket head cap bolts uniformly distributed at the periphery of the cylinder barrel.