Door machine steel pipe lifting appliance

Abstract

The utility model relates to the technical field of steel pipe lifting appliances, in particular to a portal crane steel pipe lifting appliance, which comprises a lifting mechanism which reciprocates in the vertical direction, drives the upper end of a link rod to vertically move, pushes a pulley to reciprocate in the transverse direction along an inclined guide rail, and drives a middle main hook to be automatically opened and closed. The middle main hook is evenly stressed, the steel pipe is always kept balanced during clamping, clamping is stable and reliable, and the device is suitable for safe lifting of the steel pipe. Through cooperation of the link rod and the inclined guide rail, the two pulleys can be driven to move synchronously and oppositely, and stability and balance of the middle main hook are achieved. Interference between the steel pipe and the tackle stroke is reasonably avoided, and friction force borne by the tackle during sliding is small. The main hooks clamp the steel pipe, loads received by the lifting mechanism are distributed in a balanced mode, and balance of clamping force between the two middle main hooks is guaranteed. In the clamping state, the lifting mechanism plays a locking role, the tackle is prevented from accidentally disengaging or sliding in the moving process, the overall safety is guaranteed, and the stroke is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe hangers, in particular to a steel pipe hanger for a gantry crane. Background Art

[0002] When steel pipes and cast pipes are loaded onto ships at the dock, they are typically hoisted using gantry cranes. Flatbed transport vehicles pull the pipes to the dock. High-rise hooks require workers to lay anti-fall mats around them and then climb ladders to remove the hooks. This complicated process, requiring long preparation times, poses safety hazards, and is particularly difficult to operate in slippery weather. Furthermore, some steel pipes are long and heavy, and they can slip and rotate during hoisting, creating significant safety risks and financial losses. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a steel pipe hoist for a gantry crane which has balanced force, safe and efficient hoisting and can hoist steel pipes of different lengths in response to the deficiencies of the existing technology.

[0004] The technical problem to be solved by the present invention is achieved through the following technical solutions: a steel pipe hoist for a gantry crane, comprising a horizontally arranged frame rail, the frame rail comprising a horizontal section arranged in the middle, a lifting frame provided in the middle of the horizontal section, a lifting mechanism provided on the lifting frame, inclined guide rails with downwardly inclined free ends symmetrically provided on both sides of the frame rail along the horizontal section, a group of pulleys symmetrically provided on the inclined guide rails on both sides, a middle main hook passed through each pulley, the hook body of the middle main hook extending to the outside of the car body, the hook bodies on both sides facing each other and symmetrically arranged, connecting rods symmetrically provided between the lifting mechanism and the pulleys at both ends; the lifting mechanism reciprocates in the vertical direction, driving the upper end of the connecting rod to move vertically, pushing the pulley to reciprocate laterally along the inclined guide rail, driving the middle main hook to automatically open and close. The middle main hook is evenly stressed, so that the steel pipe is always balanced when clamped, and the clamping is stable and reliable, which is suitable for safe lifting of steel pipes.

[0005] The lifting mechanism moves upward in the vertical direction along the lifting frame, and drives the two pulleys to move synchronously toward each other along the inclined guide rails through the connecting rods on both sides, with the middle main hook in a clamping state;

[0006] The lifting mechanism moves downward in the vertical direction along the lifting frame, and drives the two pulleys to move synchronously and oppositely along the inclined guide rails through the connecting rods on both sides, and the middle main hook is in an open state.

[0007] The linkage and inclined guide rails drive the two pulleys to move synchronously and in opposite directions, ensuring stability and balance for the center main hook. As the main hooks clamp the steel pipe, the load applied to the lifting mechanism is evenly distributed, ensuring a balanced clamping force between the two center main hooks. In the clamped state, the lifting mechanism acts as a locking mechanism, preventing the pulleys from accidentally disengaging or sliding during movement, ensuring overall safety.

[0008] As a further scheme of the utility model, the inclined guide rail includes two mutually parallel arranged inclined I-beams, one end of the two inclined I-beams is fixedly connected with the horizontal section at an acute angle, the free end of the two inclined I-beams is provided with a limiting end plate, a transverse guide rail groove is formed between the two inclined I-beams, the intermediate main hook reciprocates in the transverse guide rail groove, the limiting end plate is provided with a limiting groove through which the intermediate main hook passes, and the limiting groove is matched with the highest upper limit size of the hook body of the intermediate main hook. The inclined I-beams are arranged in an inclined manner, so that the interference of the steel pipe and the trolley stroke is reasonably avoided, the trolley moves along the inclined direction, the force received by the connecting rod is small, and the friction force received by the trolley when sliding is small.

[0009] As a further scheme of the utility model, the acute angle of the inclined I-beam is 5°-15°, the length of the connecting rod is always greater than the length of the inclined I-beam, the connecting rod can push the trolley to slide down along the inclined guide rail to the maximum limit position, i.e. the limiting end plate, and the limiting end plate is provided with a traction rope hook. The limiting end plate does not interfere with the movement of the intermediate main hook, the maximum displacement of the trolley is limited in the transverse direction, the trolley is ensured not to derail, and the stroke is stable and reliable.

[0010] As a further scheme of the utility model, the trolley includes a trolley body, the trolley body is provided with two groups of symmetrical front and rear arranged rollers on both sides, a roller shaft is arranged between each group of rollers, the roller shaft is matched with bearings and rollers at both ends, a shaft sleeve is arranged on the roller shaft, the roller shaft is arranged on the two side panels of the trolley body through the shaft sleeve, and the rollers on each side reciprocate along the groove body of the corresponding inclined I-beam. The trolley slides along the groove body of the inclined I-beam through the rollers, the friction is small, and the sliding is stable.

[0011] As a further scheme of the utility model, the lifting frame includes a group of lifting plates symmetrically arranged in front and back along the frame guide rail, the group of lifting plates are arranged in parallel, a vertical guide rail groove is formed in the lifting plate along the central axis, and a lifting mechanism is arranged between the two lifting plates. The vertical guide rail groove plays a guiding role in guiding the movement of the lifting mechanism.

[0012] As a further scheme of the utility model, the lifting mechanism includes two horizontal and mutually parallel arranged balance beams, a main pulley shaft is arranged between the midpoints of the balance beams, a pulley is arranged in the middle of the main pulley shaft, spacer sleeves are arranged on both sides of the pulley, and the pulley is fixed between the two balance beams through the spacer sleeves on both sides.

[0013] As a further scheme of the utility model, the balance beam is provided with a connecting hole at both ends, a connecting shaft is arranged between a group of oppositely arranged connecting holes, a sleeve is arranged on the connecting shaft, and the sleeve is connected with the upper end of the connecting rod. The connecting rod plays a role in traction and force transmission, the rotation angle of the connecting rod is adjusted in real time, the sliding of the trolley is ensured to be uniform and stable, and the trolley is stable during the whole sliding process.

[0014] As a further solution of the present invention, the frame track is provided with two sets of symmetrically arranged lifting lugs, a steel wire is wound around a pulley, and the steel wire is vertically upwardly arranged on the wire rope drum of the gantry crane. The wire rope drum tightens the wire rope, and the gantry crane is provided with two other double-ended steel ropes, each connected to the lifting lug. The two double-ended steel ropes drive the lifting mechanism upward along the vertical guide rail groove through the pulley, thereby driving the pulleys to move toward each other, driving the middle main hook into a clamping state, and the two double-ended steel ropes simultaneously lift the steel pipe upward; the wire rope drum unwinds the wire rope, and the lifting mechanism moves downward along the vertical guide rail groove through the pulley, thereby driving the pulleys to move away from each other, driving the middle main hook into an open state, unloading the steel pipe, and the two double-ended steel ropes simultaneously return to their initial lifting position. After the middle main hook clamps the steel pipe stably, it can be lifted to a high position in the vertical overall position. Through the cooperation of the pulleys, the tension of the wire rope is minimized, the stress is minimized, and the service life of the wire rope is increased.

[0015] During the entire lifting process, the wire rope is first loosened from the wire rope drum, and the lifting mechanism is driven downward along the vertical guide rail groove through the pulley; then the two pulleys are driven to move synchronously in opposite directions along the inclined guide rail through the connecting rods on both sides, and the middle main hook is in a continuously open state. The lowering position of the lifting mechanism is adjusted according to the different lengths of steel pipes.

[0016] The lifting mechanisms move downward, driving the pulleys to move backward through the connecting rod, driving the middle main hook to the open state; the hook body of the middle main hook completely avoids the two ends of the steel pipe, and the lifting mechanism stops moving.

[0017] The steel pipe to be lifted and transferred is placed between the two open middle main hooks. The wire rope drum slowly tightens the wire rope, and the lifting mechanism is driven upward along the vertical guide groove through the pulley, which in turn drives the pulleys to move towards each other, driving the middle main hooks to move towards each other, clamping the steel pipe and playing a locking role.

[0018] After the two middle main hooks clamp the steel pipe stably, the two double-ended steel wire ropes lift the steel pipe upwards at the same time, transfer the steel pipe to a high place and place it stably, the wire rope drum releases the wire rope, the lifting mechanism moves downward, and drives the pulleys to move backward through the connecting rod, driving the middle main hook to the open state, unloading the steel pipe, the wire rope drum releases the wire rope, and drives the lifting mechanism to move downward along the vertical guide groove through the pulley, and the two double-ended steel wire ropes return to the initial lifting position at the same time. The middle main hook is in an unloaded state and is ready for the next lifting.

[0019] The beneficial effects of the present invention include: a steel pipe hoist for a gantry crane, comprising a lifting mechanism that reciprocates vertically, driving the upper end of a connecting rod to move vertically, pushing a pulley to reciprocate laterally along an inclined guide rail, and driving the central main hook to automatically open and close. The central main hook is evenly stressed, ensuring a balanced grip on the steel pipe during clamping, providing stable and reliable grip and suitable for safe steel pipe lifting.

[0020] The linkage and inclined guide rails drive the two pulleys to move synchronously and in opposite directions, ensuring stability and balance for the center main hook. As the main hooks clamp the steel pipe, the load applied to the lifting mechanism is evenly distributed, ensuring a balanced clamping force between the two center main hooks. In the clamped state, the lifting mechanism acts as a locking mechanism, preventing the pulleys from accidentally disengaging or sliding during movement, ensuring overall safety.

[0021] The tilted I-beam design effectively avoids interference between the steel pipe and the pulley travel. Furthermore, as the pulley moves in the tilted direction, the force applied to the connecting rod is reduced, and the friction experienced by the pulley during sliding is reduced. The limit end plate does not interfere with the movement of the middle main hook, limiting the maximum lateral displacement of the pulley, ensuring that the pulley will not derail and the travel is stable and reliable.

[0022] The connecting rod plays the role of traction and force transmission. The rotation angle of the connecting rod is adjusted in real time to ensure that the sliding speed of the pulley is uniform and smooth throughout the sliding process. Through the coordination of the pulley, the tension of the wire rope is reduced to a minimum, the stress is minimized, and the service life of the wire rope is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The working state of the present invention Figure One ;

[0024] Figure 2 The working state of the present invention Figure Two ;

[0025] Figure 3 A top view of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the middle main hook of the present invention;

[0027] Figure 5 This is the overall assembly diagram of the trolley of the present invention;

[0028] Figure 6 This is a top view of the trolley structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the installation of the roller of the present invention;

[0030] Figure 8 This is a front view of the frame track of the present invention;

[0031] Figure 9 A top view of the frame track of the present invention;

[0032] Figure 10 This is a structural diagram of the position-limiting end plate of the present invention;

[0033] Figure 11 It is a three-dimensional schematic diagram of the lifting mechanism of the present invention;

[0034] Figure 12 This is a front view of the lifting mechanism of the present invention;

[0035] Figure 13 It is a side view of the lifting mechanism of the present invention;

[0036] Figure 14 It is a schematic diagram of the balance beam structure of the present invention;

[0037] Figure 15 It is a schematic diagram of the sleeve structure of the present invention.

[0038] Among them: 1-middle main hook, 2-pulley, 201-roller, 202-roller shaft, 203-sleeve, 3-frame track, 301-inclined guide rail, 311-limiting end plate, 312 traction rope hook, 313-limiting groove, 302-horizontal section, 4-connecting rod, 5-lifting ear, 6-lifting mechanism, 601-balance beam, 611-connecting hole, 602-connecting shaft, 621-sleeve, 603-spacer, 604-pulley, 605-main pulley shaft, 7-lifting frame, 701-lifting plate, 711-vertical guide rail groove. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0041] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] Example 1

[0043] like Figures 1 to 15 As shown, a steel pipe hoist for a gantry crane includes a horizontally arranged frame rail 3, which includes a centrally arranged horizontal section 302. A lifting frame 7 is positioned in the middle of the horizontal section. The lifting frame comprises a set of lifting plates 701 arranged symmetrically along the frame rail. The plates are arranged in parallel, each with a vertical guide groove 711 defined along its central axis. A lifting mechanism 6 is positioned between the two lifting plates. The vertical guide groove guides the movement of the lifting mechanism. The lifting mechanism reciprocates vertically along the vertical guide grooves on the lifting plates.

[0044] Lifting frame 7 is equipped with a lifting mechanism 6, which comprises two horizontal, parallel balance beams 601. A main pulley shaft 605 is positioned between the midpoints of the balance beams. A pulley 604 is positioned in the middle of the main pulley shafts. Spacers 603 are positioned on either side of the pulleys, securing the pulleys between the two balance beams. The spacers constrain the pulleys to the midpoint of the main pulley shafts. During the pulley movement, the pulleys do not move or experience additional stress.

[0045] The balance beam 601 is provided with connection holes 611 at both ends. A connecting shaft 602 extends between two opposing sets of connection holes. A sleeve 621 is mounted on the connecting shaft and connected to the upper end of the connecting rod 4. The connecting rod serves to pull and transmit force. Its rotation angle is adjusted in real time to ensure uniform and smooth sliding of the pulley throughout the entire sliding process. The sleeve rotates circumferentially along the connecting shaft, driving the connecting rod to rotate synchronously along the circumference of the connecting shaft, thereby changing the sliding angle of the connecting rod over time.

[0046] The frame track along the horizontal section is symmetrically provided with two inclined guide rails 301 with free ends inclined downward, the inclined guide rail comprises two mutually parallel inclined I-beams, one end of the two inclined I-beams is fixedly connected with the horizontal section at an acute angle, the free end of the two inclined I-beams is provided with a limiting end plate, a transverse guide rail groove is formed between the two inclined I-beams, the intermediate main hook reciprocates in the transverse guide rail groove, the limiting end plate 311 is provided with a limiting groove 313 through which the intermediate main hook passes, and the limiting groove is matched with the highest upper limit size of the hook body of the intermediate main hook. The transverse guide rail groove guides the intermediate main hook and avoids the space for the sliding of the intermediate main hook in the transverse direction.

[0047] A group of trolleys 2 are symmetrically arranged on the two inclined guide rails, the acute angle of the inclined I-beams is 5°, the inclined I-beams are arranged in an inclined manner, the steel pipe and the trolley stroke do not interfere with each other, the trolley moves in the inclined direction, the force received by the connecting rod is small, and the friction force received by the trolley when sliding is small.

[0048] The length of the connecting rod 4 is always greater than the length of the inclined I-beam, the connecting rod can push the trolley to slide downward along the inclined guide rail to the maximum limit position, i.e. the limiting end plate, the limiting end plate is provided with a traction rope hook 312. The limiting end plate does not interfere with the movement of the intermediate main hook, the maximum displacement of the trolley is limited in the transverse direction, the trolley is limited from derailing, and the maximum clamping space between the intermediate main hooks is formed.

[0049] The trolley 2 comprises a trolley body, the trolley body is provided with two groups of symmetrically arranged front and rear rollers 201 on the two sides, a roller shaft 202 is arranged between each group of rollers, the two ends of the roller shaft are matched with bearings and rollers respectively, a shaft sleeve 203 is arranged on the roller shaft, the roller shaft is arranged on the two side panels of the trolley body through the shaft sleeve, and the rollers on each side slide reciprocally along the groove body of the corresponding inclined I-beam. The trolley slides along the groove body of the inclined I-beam through the rollers, the friction force is small, and the sliding is stable.

[0050] The intermediate main hook 1 is arranged in each trolley 2, the hook body of the intermediate main hook extends to the outside of the trolley body, the hook bodies on the two sides are arranged symmetrically and face each other, and the connecting rod 4 is symmetrically arranged between the lifting mechanism and the trolleys at the two ends; the lifting mechanism reciprocates in the vertical direction, drives the upper end of the connecting rod to move vertically, pushes the trolley to reciprocate in the transverse direction along the inclined guide rail, and drives the intermediate main hook to automatically open and close. The intermediate main hook is uniformly stressed, the steel pipe is always kept balanced when clamped, the steel pipe is stably clamped, and the steel pipe is safely hoisted.

[0051] The lifting mechanism 6 moves upward along the lifting frame 7 in the vertical direction, cooperates with the connecting rod 4 and the inclined guide rail, drives the two trolleys to synchronously and oppositely move along the inclined guide rail through the two connecting rods, and drives the two trolleys to synchronously and oppositely move, so that the stability and balance of the intermediate main hook are realized. The main hook clamps the steel pipe, the load received by the lifting mechanism is balanced and distributed, and the balance of the clamping force between the two intermediate main hooks is ensured. When the intermediate main hook is in the clamping state, the lifting mechanism plays a locking role, and prevents the trolley from accidentally separating or sliding during the movement.

[0052] The frame rail 3 is equipped with two sets of symmetrically arranged lifting lugs 5. Steel wire is wound around pulleys and mounted vertically upward on the gantry crane's wire rope drum. The wire rope drum tightens the wire rope, and the gantry crane is equipped with two other double-ended wire ropes, each connected to the lifting lugs 5. The pulleys drive the lifting mechanism upward along the vertical guide rail groove, which in turn drives the pulleys to move toward each other, driving the middle main hook into a clamping position. The two double-ended wire ropes simultaneously lift the steel pipe upward. When the steel pipe is lifted to a high point, the wire rope drums unwind the wire ropes, driving the lifting mechanism downward along the vertical guide rail groove through the pulleys. The lifting mechanism moves downward vertically along the lifting frame, and then, through the connecting rods on both sides, drives the two pulleys to move synchronously away from each other along the inclined guide rails. The middle main hook opens, and the steel pipe is unloaded. The two double-ended wire ropes simultaneously return downward to their initial lifting position.

[0053] Example 2

[0054] The hoisting method of the sling comprises:

[0055] Step 1: The wire rope drum unwinds the wire rope, and drives the lifting mechanism 6 to move downward along the vertical guide rail groove 711 through the pulley 604; then the two pulleys are driven to move synchronously and oppositely along the inclined guide rail through the connecting rods on both sides, and the middle main hook is in a continuously open state. The lowering position of the lifting mechanism is adjusted according to the different lengths of the steel pipes.

[0056] Step 2: The lifting mechanism 6 moves downward, driving the pulley 2 to move in reverse through the connecting rod 4, driving the middle main hook to be in the open state; the hook body of the middle main hook 1 completely avoids the two ends of the steel pipe, and the lifting mechanism stops moving.

[0057] Step 3: Place the steel pipe to be lifted and transferred between the two middle main hooks 1 in the open state, slowly tighten the wire rope on the wire rope drum, and drive the lifting mechanism to move upward along the vertical guide groove through the pulley 604, thereby driving the pulleys to move towards each other, driving the middle main hooks to move towards each other, and clamping the steel pipe;

[0058] Step 4: After the two middle main hooks 1 clamp the steel pipe stably, the two double-ended wire ropes simultaneously lift the steel pipe upwards and transfer it to a higher place;

[0059] Step 5: When the steel pipe is placed at a high place, the wire rope drum unwinds the wire rope, and the lifting mechanism 6 moves downward, driving the pulleys to move in opposite directions through the connecting rod 4, driving the middle main hook to be in an open state, unloading the steel pipe, and the wire rope drum unwinds the wire rope, and drives the lifting mechanism to move downward along the vertical guide groove through the pulley. The two double-ended wire ropes return to the initial lifting position at the same time, and the middle main hook 1 is in an unloaded state, ready for the next lifting use.

[0060] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0061] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A steel pipe hanger for a gantry crane, characterized in that: The invention comprises a horizontally arranged frame track (3), the frame track comprises a horizontal section (302) arranged in the middle, a lifting frame (7) is provided in the middle of the horizontal section, a lifting mechanism (6) is provided on the lifting frame, inclined guide rails (301) with free ends inclined downward are symmetrically provided on both sides of the frame track of the horizontal section, a group of pulleys (2) are symmetrically provided on the inclined guide rails on both sides, a middle main hook (1) is passed through each pulley, the hook body of the middle main hook extends to the outside of the vehicle body, the hook bodies on both sides are facing each other and symmetrically arranged, and connecting rods (4) are symmetrically provided between the lifting mechanism and the pulleys at both ends; The lifting mechanism (6) moves upward in the vertical direction along the lifting frame, and drives the two pulleys to move synchronously toward each other along the inclined guide rails through the connecting rods on both sides, and the middle main hook is in a clamping state; The lifting mechanism (6) moves downward in a vertical direction along the lifting frame, and drives the two pulleys to move synchronously and oppositely along the inclined guide rails through the connecting rods on both sides, and the middle main hook is in an open state.

2. The steel pipe hanger for a gantry crane according to claim 1, characterized in that: The inclined guide rail (301) comprises two inclined I-beams arranged parallel to each other, one end of the two inclined I-beams being fixedly connected to the horizontal section at an acute angle, a limiting end plate (311) being provided at the free ends of the two inclined I-beams, a transverse guide rail groove being formed between the two inclined I-beams, the middle main hook reciprocating in the transverse guide rail groove, a limiting groove (313) through which the middle main hook passes is provided at the lower portion of the limiting end plate (311), and the limiting groove is matched with the upper limit size of the middle main hook body.

3. The steel pipe hanger for a gantry crane according to claim 2, characterized in that: The acute angle of the inclined I-beam is 5°-15°, the length of the connecting rod is always greater than the length of the inclined I-beam, and the connecting rod can push the pulley to slide down along the inclined guide rail to the maximum limit position, that is, the limit end plate, and the limit end plate is provided with a traction rope hook (312).

4. The steel pipe hanger for a gantry crane according to claim 2, characterized in that: The pulley (2) comprises a vehicle body, two groups of symmetrically arranged rollers (201) are provided on both sides of the vehicle body, a roller shaft (202) is provided between each group of rollers, both ends of the roller shaft are matched with the rollers through bearings, a shaft sleeve (203) is provided on the roller shaft, and the roller shaft is arranged on the two side panels of the vehicle body through the shaft sleeve, and the roller on each side slides back and forth along the groove body of the inclined I-beam on the corresponding side.

5. The steel pipe hanger for a gantry crane according to claim 1, characterized in that: The lifting frame (7) comprises a group of lifting plates (701) symmetrically arranged along the frame guide rail, one group of lifting plates being arranged in parallel, a vertical guide rail groove (711) being provided along the central axis of the lifting plates, and a lifting mechanism being arranged between the two lifting plates.

6. The steel pipe hanger for a gantry crane according to claim 4, characterized in that: The lifting mechanism (6) comprises two horizontal and mutually parallel balance beams (601), a main pulley shaft (605) is provided between the midpoints of the balance beams, a pulley (604) is provided in the middle of the main pulley shaft, and spacers (603) are provided on both sides of the pulley. The pulley is fixed between the two balance beams through the spacers on both sides.

7. The steel pipe hanger for a gantry crane according to claim 6, characterized in that: Both ends of the balance beam (601) are provided with connection holes (611), a connection shaft (602) is passed through two sets of connection holes arranged opposite to each other, a sleeve (621) is provided on the connection shaft, and the sleeve is connected to the upper end of the connecting rod.

8. The steel pipe hanger for gantry crane according to claim 5, characterized in that: The frame track (3) is provided with two groups of symmetrically arranged lifting ears (5), and a steel wire is wound on the pulley. The steel wire is vertically arranged on the wire rope drum of the door machine. The wire rope drum tightens the wire rope, and the door machine is provided with two other double-ended steel ropes, which are respectively connected to the lifting ears. The lifting mechanism is driven to move upward along the vertical guide rail groove through the pulley, and then the pulley (2) is driven to move toward each other, driving the middle main hook to be in a clamping state, and the two double-ended steel ropes simultaneously lift the steel pipe upward; the wire rope drum relaxes the wire rope, and drives the lifting mechanism to move downward along the vertical guide rail groove through the pulley, and then drives the pulley to move away from each other, driving the middle main hook to be in an open state, and unloading the steel pipe. The two double-ended steel ropes simultaneously return to the initial lifting position downward.

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