Lifting sleeve with multi-head lead screw structure for crane pipe

Abstract

The utility model relates to a multi-head lead screw structure lifting sleeve for a crane pipe, which comprises a horizontally arranged rotary joint, an elbow is arranged at the other end of the rotary joint, a vertically arranged fixed seat is arranged on the elbow, and a driving mechanism for driving the lifting sleeve to lift is arranged in the fixed seat; the driving mechanism drives the inner sleeve to slide up and down relative to the outer sleeve, sliding driving force is provided, sliding is stable, sealing performance is kept in the telescopic process of the inner sleeve and the outer sleeve, and liquid leakage is avoided. The guide sliding plates on the inner sleeve and the outer sleeve are matched with the guide walkway, and the sliding track is stable and reliable. And the fan-shaped holes formed in the fixing ring uniformly distribute the fluid, so that the problems of oscillation and turbulence possibly caused by non-uniform flowing of the fluid are effectively reduced, the resistance of the fluid when passing through the holes is reduced, the pressure loss of the fluid is reduced, the noise level generated when the fluid is jetted is reduced, and the system efficiency is improved. The hand wheel is adopted to facilitate operation, original power for rotation of the multi-head lead screw is provided, force is small, generated rotating force is large, and operation is labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid loading and unloading equipment, in particular to a lifting sleeve with a multi-threaded screw structure for a crane pipe. Background Art

[0002] The lifting sleeve is one of the main components of the top loading crane. It needs to be inserted into the tanker when in use to meet the needs of underwater loading. It is generally used for top loading of flammable and explosive media. At present, the lifting sleeve uses a tension spring or a traction weight to control its lifting and lowering. That is, when the medium impacts the inner sleeve of the drop tube, the inner sleeve extends out of the outer sleeve, and the tension spring inside the drop tube is stretched or the weight is lifted. When the medium stops impacting the inner sleeve of the drop tube, the inner sleeve retracts into the outer sleeve under the spring reset tension or the weight of the weight.

[0003] When the density of the medium conveyed by the crane is relatively viscous, the inner wall of the inner sleeve will be covered with the medium, and the inner and outer sleeves will be easily stuck by the medium. Regardless of whether the tension spring lifting structure or the traction weight structure is adopted, the outer sleeve cannot be retracted due to the increase in weight of the medium sticking to the inner wall or the outer sleeve and the inner sleeve being stuck together, which cannot meet the needs of loading. Summary of the invention

[0004] The purpose of the utility model is to provide a lifting sleeve with a multi-screw structure for a crane pipe, so as to solve the problems raised in the above-mentioned background technology. The utility model adopts a multi-screw as a lifting device, and drives the multi-screw to rotate relative to the nut to make the outer sleeve lift relative to the inner sleeve. The lifting speed is controlled by the number of screw heads selected. The use of a multi-screw drive not only solves the problem of low efficiency of ordinary thread rotation, but also makes the lifting process more stable and improves work efficiency. The design of the lifting sleeve with a multi-screw structure has the advantages of high load-bearing capacity and can adapt to the use requirements in various complex environments.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a lifting sleeve with a multi-screw structure for a crane pipe, comprising a horizontally arranged rotary joint, one end of which is connected to the outer arm of the crane pipe, an elbow is provided at the other end of the rotary joint, and a lifting sleeve is provided at the lower end of the elbow, characterized in that: a vertically arranged fixing seat is provided on the elbow, and a driving mechanism for driving the lifting sleeve to rise and fall is provided in the fixing seat;

[0006] The driving mechanism includes a multi-threaded screw that is arranged in the lifting sleeve, a cover plate is arranged at the end, a center hole is arranged on the cover plate, the upper end of the multi-threaded screw passes through the center hole and then extends out of the cover plate, a hand wheel is connected to the upper end of the multi-threaded screw, and a sealing component and a connecting component are arranged between the multi-threaded screw and the fixed seat;

[0007] The lifting sleeve comprises an outer sleeve and an inner sleeve, a guide assembly is arranged between the outer sleeve and the inner sleeve, a fixing ring is arranged in the upper tube mouth of the inner sleeve, a nut is arranged below the fixing ring, the nut is threadedly matched with a multi-start lead screw, and a limit ring for limiting the nut is arranged at the lower end of the multi-start lead screw. The driving mechanism drives the inner sleeve to slide up and down relative to the outer sleeve, provides a driving force for sliding, and the sliding is stable. During the extension and retraction process of the inner and outer sleeves, the sealing is maintained and no liquid leakage occurs.

[0008] As a further solution of the utility model, the connecting assembly includes a bearing provided in a fixed seat and cooperating with a multi-start screw, a hole step with an enlarged diameter is provided on the inner wall of the fixed seat above the bearing, a copper spacer and a basket nut are provided in the hole step from bottom to top, a copper pad is provided on the inner wall of the fixed seat below the bearing, and a sealing assembly is arranged between the bearing and the copper pad.

[0009] As a further solution of the utility model, the sealing component is a sealing ring.

[0010] As a further solution of the utility model, the guide assembly includes a guide walkway welded to the inner wall of the outer sleeve, and a guide slide plate welded to the outer wall of the inner sleeve. The guide slide plate and the guide walkway are slidably matched. When the inner sleeve slides up and down relative to the outer sleeve, the guide walkway guides the guide slide plate to slide up and down in the guide walkway. The lower end of the guide walkway is provided with a plurality of layers of limit blocks. The guide slide plate cooperates with the guide walkway, and the sliding track is stable and reliable.

[0011] As a further solution of the utility model, the center of the fixed ring is provided with a through hole through which a multi-start lead screw passes, and a plurality of fan-shaped holes are evenly distributed around the outside of the through hole. The flow cross section formed by the plurality of fan-shaped holes meets the loading flow flux. The fan-shaped holes evenly distribute the fluid, effectively reducing the problems that may be caused by uneven fluid flow, such as oscillation and turbulence. The resistance of the fluid when passing through the hole is reduced, the fluid pressure loss is reduced, the noise level generated when the fluid is injected is reduced, and the system efficiency is improved.

[0012] As a further solution of the utility model, the lower end of the elbow is provided with an outlet flange, the upper pipe opening of the outer sleeve is provided with a sleeve connecting flange, a sealing gasket is provided between the outlet flange and the sleeve connecting flange, and the outlet flange and the sleeve connecting flange are connected by bolts and nuts. The elbow and the outer sleeve are easy to install and disassemble, and the operation is convenient.

[0013] As a further solution of the utility model, a fixing assembly is provided between the upper end of the multi-threaded screw and the hand wheel, the fixing assembly includes a positioning key clamped between the multi-threaded screw and the hand wheel, a pressing plate is provided at the top of the multi-threaded screw, and threaded holes are provided along the axis on the pressing plate and the end face of the multi-threaded screw, and locking screws are provided in the threaded holes, and the pressing plate is pressed to fix the hand wheel firmly. The hand wheel is easy to operate, provides the original power for the rotation of the multi-threaded screw, requires little force, generates large rotational force, and saves effort in operation.

[0014] As a further solution of the utility model, a sealing plate is provided at the bottom of the inner sleeve, and two symmetrically arranged diversion ports are provided on the tube wall at the bottom of the inner sleeve. The sealing plate prevents the oil from falling with gravity, and falls after blocking the diversion and buffering the pressure, which has a small impact on the tank truck and a long service life.

[0015] As a further solution of the utility model, the fixing seat is coaxially arranged with the lifting sleeve, so that the force is balanced during the lifting process, the sliding is smoother, and the telescopic efficiency is high.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The driving mechanism drives the inner sleeve to slide up and down relative to the outer sleeve, providing a driving force for sliding, and the sliding is stable. In addition, the sealing is maintained during the extension and retraction process of the inner and outer sleeves, and no liquid leakage occurs.

[0018] (2) The guide slides on the inner sleeve and the outer sleeve cooperate with the guide walkway, and the sliding track is stable and reliable.

[0019] (3) The fan-shaped holes set on the fixing ring evenly distribute the fluid, effectively reducing the problems that may be caused by uneven fluid flow, such as oscillation and turbulence. It reduces the resistance of the fluid when passing through the hole, reduces the fluid pressure loss, reduces the noise level generated when the fluid is injected, and improves the system efficiency.

[0020] (4) The outlet flange and the casing connection flange are connected by bolts and nuts. The elbow and the outer casing are easy to install and disassemble, and the operation is convenient.

[0021] (5) A fixing assembly is provided between the upper end of the multi-thread screw and the hand wheel, and the hand wheel is firmly fixed by a pressing plate. The hand wheel is easy to operate and provides the original power for the rotation of the multi-thread screw. It requires little force, generates large rotational force, and saves effort in operation.

[0022] (6) A sealing plate is provided at the bottom of the inner casing to prevent the oil from falling due to gravity. The sealing plate buffers the pressure by blocking the diversion before falling, which has little impact on the tank truck and has a long service life.

[0023] (7) The fixed seat is coaxially arranged with the lifting sleeve. The force is balanced during the lifting process, the sliding is smoother, and the telescopic efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall assembly structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the working state of the utility model;

[0026] Figure 3 It is a schematic diagram of the utility model in the direction of AA;

[0027] Figure 4 It is a detailed structural diagram of the driving structure of the utility model;

[0028] Figure 5 It is a schematic diagram of the fixing ring structure of the utility model.

[0029] In the figure: 1-driving mechanism, 101-locking screw, 102-pressure plate, 103-positioning key, 104-handwheel, 106-cover plate, 107-fixed seat, 108-basket nut, 109-copper spacer, 110-bearing, 111-sealing assembly, 112-copper pad, 2-swivel joint, 3-elbow, 4-outlet flange, 5-casing connection flange, 6-fixing ring, 601-sector hole, 602-through hole, 7-outer sleeve, 8-inner sleeve, 9-multi-start lead screw, 10-limit block, 11-limit ring, 12-sealing plate, 13-nut, 14-bolt, 15-sealing gasket, 16-guide walkway, 17-guide slide plate, 18-diversion port. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Please see attached Figure 1 -Attached Figure 5 A lifting sleeve with a multi-screw structure for a crane pipe comprises a horizontally arranged rotary joint 2, one end of which is connected to the outer arm of the crane pipe, the other end of which is provided with an elbow 3, the lower end of the elbow is provided with a lifting sleeve, the lower end of the elbow is provided with an outlet flange 4, a sleeve connecting flange 5 is provided at the pipe mouth of the outer sleeve, a sealing gasket 15 is provided between the outlet flange and the sleeve connecting flange, and the outlet flange and the sleeve connecting flange are connected by bolts 14 and nuts. When replacement and disassembly are required, the bolts and nuts are loosened, the outlet flange is separated from the sleeve connecting flange, and the lifting sleeve is replaced. After replacing the new lifting sleeve, the outlet flange is connected to the sleeve connecting flange, the sealing gasket is installed between them, and assembled with bolts and nuts.

[0032] The elbow is provided with a vertically arranged fixing seat 107, which is coaxially arranged with the lifting sleeve. A driving mechanism 1 for driving the lifting sleeve to rise and fall is arranged in the fixing seat; the driving mechanism includes a multi-threaded screw 9 which is arranged in the lifting sleeve, a cover plate 106 is arranged at the end, a center hole is arranged on the cover plate, the upper end of the multi-threaded screw passes through the center hole and then extends out of the cover plate, and a hand wheel 104 is connected to the upper end of the multi-threaded screw.

[0033] A fixing assembly is provided between the upper end of the multi-threaded screw and the hand wheel, and the fixing assembly includes a positioning key 103 clamped between the multi-threaded screw 9 and the hand wheel 104. A pressing plate 102 is provided at the top of the multi-threaded screw, and threaded holes are provided along the axis on the pressing plate and the end surface of the multi-threaded screw. A locking screw 101 is provided in the threaded hole, and the pressing plate is pressed to fix the hand wheel firmly. Manually turning the hand wheel 104 drives the multi-threaded screw to rotate synchronously.

[0034] A sealing component 111 and a connecting component are provided between the multi-start lead screw and the fixed seat; the connecting component includes a bearing 110 provided in the fixed seat and matched with the multi-start lead screw, a hole step with an enlarged diameter is provided on the inner wall of the fixed seat above the bearing, a copper spacer 109 and a basket nut 108 are provided in the hole step from bottom to top, a copper pad 112 is provided on the inner wall of the fixed seat below the bearing, and the sealing component is provided between the bearing and the copper pad. The sealing component 111 is a sealing ring.

[0035] A fixing ring 6 is arranged in the upper tube mouth of the inner sleeve, a nut 13 is arranged below the fixing ring, the nut is threadedly matched with the multi-threaded screw, and a limiting ring 11 for limiting the nut is arranged at the lower end of the multi-threaded screw. During the continuous rotation of the multi-threaded screw, the fixing ring moves downward along the multi-threaded screw.

[0036] The lifting sleeve includes an outer sleeve 7 and an inner sleeve 8, and a guide assembly is arranged between the outer sleeve and the inner sleeve, and the guide assembly includes a guide walkway 16 welded to the inner wall of the outer sleeve, and a guide slide plate 17 welded to the outer wall of the inner sleeve, and the guide slide plate is slidably matched with the guide walkway. When the inner sleeve slides up and down relative to the outer sleeve, the guide walkway guides the guide slide plate to slide up and down in the guide walkway, and a three-layer limit block 10 is arranged at the lower end of the guide walkway. The limit block 10 defines the lowest position limit of the inner sleeve in the outer sleeve.

[0037] The multi-head screw rotates relative to the nut, and the movement of the nut is transmitted to the fixed ring 6. The fixed ring drives the guide slide of the inner sleeve to move downward along the guide walkway. When it moves to the predetermined position, the hand wheel stops rotating, and the extended length of the inner sleeve remains unchanged.

[0038] When the inner sleeve is continuously extended along the outer sleeve, until the fixing ring moves to the position of the limit ring 11, the inner sleeve reaches the lowest limit position and stops extending further.

[0039] The center of the fixing ring 6 is provided with a through hole 602 through which a multi-start lead screw passes, and the outer periphery of the through hole is evenly distributed with four fan-shaped holes 601, and the flow cross section formed by the four fan-shaped holes meets the flow flux of the loading flow. The bottom of the inner sleeve is provided with a sealing plate 12, and the tube wall at the bottom end of the inner sleeve is provided with two symmetrically arranged diversion ports 18.

[0040] After the relative position of the inner sleeve in the outer sleeve is fixed, the inner sleeve is extended into the tank car to carry out the next step of oil delivery. The oil enters the lifting sleeve along the curved pipe, first enters the outer sleeve of the lifting sleeve, and the oil falls from the four fan-shaped holes 601 of the fixed ring, then flows down along the inner sleeve, falls on the sealing plate for a short stay, and then flows out into the tank car through the diversion port 18 after being buffered. After the oil flows down, the impact force on the tank car is small, and it will not cause impact loss on the inner wall of the tank car and a large amount of splashing of the oil, and the transfer is completed.

[0041] After the oil transfer is completed, the hand wheel 104 is rotated in the opposite direction to drive the fixed seat to rotate upward along the multi-head screw, and the fixed seat 107 drives the guide slide 17 of the inner sleeve to move upward along the guide walkway 16 until the inner sleeve is completely retracted into the outer sleeve. Then, the hand wheel 104 is stopped to complete the return of the inner sleeve for next use.

[0042] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting sleeve with a multi-screw structure for a crane pipe, comprising a horizontally arranged rotary joint (2), one end of which is connected to the outer arm of the crane pipe, and the other end of which is provided with an elbow (3), and the lower end of the elbow is provided with a lifting sleeve, characterized in that: The elbow is provided with a vertically arranged fixing seat (107), and a driving mechanism (1) for driving the lifting sleeve to move up and down is arranged in the fixing seat; The driving mechanism comprises a multi-threaded lead screw (9) which is arranged through the lifting sleeve, a cover plate (106) is arranged at the end, a center hole is arranged on the cover plate, the upper end of the multi-threaded lead screw passes through the center hole and then extends out of the cover plate, the upper end of the multi-threaded lead screw is connected to a hand wheel (104), and a sealing component and a connecting component are arranged between the multi-threaded lead screw and the fixed seat; The lifting sleeve comprises an outer sleeve (7) and an inner sleeve (8), a guide assembly is provided between the outer sleeve and the inner sleeve, a fixing ring (6) is provided in the upper tube mouth of the inner sleeve, a nut (13) is provided below the fixing ring, the nut is threadably matched with the multi-threaded screw, and a limiting ring (11) is provided at the lower end of the multi-threaded screw to limit the nut.

2. The lifting sleeve with a multi-screw structure for a crane according to claim 1 is characterized in that: The connection assembly comprises a bearing (110) matched with a multi-start lead screw arranged in a fixed seat, a hole step with an enlarged diameter arranged on the inner wall of the fixed seat above the bearing, a copper spacer (109) and a basket nut (108) arranged in sequence from bottom to top in the hole step, a copper pad (112) arranged on the inner wall of the fixed seat below the bearing, and a sealing assembly arranged between the bearing and the copper pad.

3. The lifting sleeve with a multi-screw structure for a crane according to claim 2 is characterized in that: The sealing component (111) is a sealing ring.

4. The lifting sleeve with a multi-screw structure for a crane according to claim 1 is characterized in that: The guide assembly comprises a guide walkway (16) welded to the inner wall of the outer sleeve, and a guide slide plate (17) welded to the outer wall of the inner sleeve. The guide slide plate and the guide walkway are slidably matched. When the inner sleeve slides up and down relative to the outer sleeve, the guide walkway guides the guide slide plate to slide up and down in the guide walkway. A plurality of layers of limit blocks (10) are arranged at the lower end of the guide walkway.

5. The lifting sleeve with a multi-screw structure for a crane according to claim 1 is characterized in that: The center of the fixing ring (6) is provided with a through hole (602) through which a multi-start lead screw passes, and a plurality of fan-shaped holes (601) are evenly distributed around the outside of the through hole. The flow cross section formed by the plurality of fan-shaped holes satisfies the loading flow flux.

6. The lifting sleeve with a multi-screw structure for a crane according to claim 1 is characterized in that: The lower end of the elbow (3) is provided with an outlet flange (4), the upper pipe opening of the outer sleeve is provided with a sleeve connecting flange (5), a sealing gasket (15) is provided between the outlet flange and the sleeve connecting flange, and the outlet flange and the sleeve connecting flange are connected by bolts (14) and nuts.

7. The lifting sleeve with a multi-screw structure for a crane according to claim 1 is characterized in that: A fixing assembly is provided between the upper end of the multi-threaded screw and the handwheel (104), and the fixing assembly includes a positioning key (103) clamped between the multi-threaded screw and the handwheel, a pressure plate (102) is provided at the top of the multi-threaded screw, and threaded holes are provided along the axis on the pressure plate and the end surface of the multi-threaded screw, and a locking screw (101) is provided in the threaded hole, and the pressure plate is pressed to firmly fix the handwheel.

8. The lifting sleeve with a multi-screw structure for a crane according to claim 1 is characterized in that: A sealing plate (12) is provided at the bottom of the inner sleeve, and two symmetrically arranged flow diversion ports (18) are provided on the tube wall at the bottom end of the inner sleeve.

9. The lifting sleeve with a multi-screw structure for a crane according to claim 1, characterized in that: The fixing seat (107) is coaxially arranged with the lifting sleeve.

Images