CN204778471U - Single armed formula on -load tap -changer core hoisting accessory - Google Patents

Abstract

The utility model relates to the technical field of substation maintenance equipment, in particular to a lifting device for a core body of a single-arm type on-load tap changer. At present, the operation of lifting the core usually uses a crane or a frame-type lifter for hoisting, which has problems such as difficult operation. The technical scheme of the utility model includes a boom, a column, a base, a guide sleeve, a slewing mechanism, a hoisting mechanism, and a boom adjustment mechanism; the guide sleeve is fixed on the top of the column, and the lower end of the column is connected to the base through a slewing mechanism; Installed in the guide sleeve; the hoisting mechanism and the boom adjustment mechanism are located on both sides of the column, which are used for hoisting operations and adjusting and controlling the length of the hoisting section of the boom respectively. The utility model has the advantages of simple and reasonable structure, stable and reliable hoisting operation, and flexible operation. It is suitable for hoisting core bodies of transformer on-load tap changers of various specifications, reduces the difficulty of operation and labor intensity, and effectively improves work efficiency.

Description

Lifting device for single-arm on-load tap-changer core body

technical field

The utility model relates to the technical field of substation maintenance equipment, in particular to a lifting device for a core body of a single-arm type on-load tap changer.

Background technique

The transformer on-load tap-changer is a switching device that provides a constant voltage for the transformer when the load changes. During maintenance, the core of the on-load tap-changer needs to be taken out of the tap-changer equipment housing; currently, the operation of lifting the core is usually Use a crane to lift or a frame-type lifter for hoisting operations. Due to the small gap between the core body and the outer wall of the on-load tap-changer, the distance between the crane and the equipment is relatively large, the boom is not easy to control during the lifting process, and the stability is poor. The small swing of the boom and the sling can easily cause the core body to touch the shell, resulting in accidental impact damage to the contacts on the core body and the outer wall. The operation is difficult and risky, and the crane is large in size and poor in site adaptability. The frame-type lifter is generally connected with the shell of the on-load tap-changer. If the core body needs to be shifted horizontally after being lifted, it must be manually forced to swing laterally away from the opening of the core body, which is time-consuming and labor-intensive, and has construction efficiency Low, high work intensity and other issues.

Contents of the invention

The purpose of this utility model is to provide a single-arm type on-load tap-changer core lifting device, which is small in size, light in weight, simple and reasonable in structure, easy to operate, and suitable for various types of on-load tap-changer equipment.

The technical scheme of the utility model: includes a boom, a column, a base, a guide sleeve, a rotary mechanism, a lifting mechanism, and a boom adjustment mechanism; the guide sleeve is horizontally fixed on the top of the column, and the lower end of the column is rotatably connected to the base through the rotary mechanism; The middle section of the arm is inserted into the guide sleeve, and the boom and the guide sleeve are slidably matched;

The lifting mechanism and the boom adjustment mechanism are respectively located on both sides of the column; the lifting mechanism includes a first wire tensioner and two hoisting pulleys, the first wire tensioner is fixed on the middle section of the column; the two lifting pulleys are installed on the boom respectively. The end of the hoisting section at the front and the upper section of the column; the hoisting rope goes around the two hoisting pulleys, one end of the hoisting rope is provided with a hook, and the other end is connected to the first wire tensioner;

The boom adjustment mechanism includes the second wire tensioner fixed on the middle section of the column and the fixed pulley fixed on the upper section of the column. The stay rope bypasses the fixed pulley, and the two ends are respectively connected with the rear end of the boom and the second wire tensioner of the adjustment mechanism.

Further, the slewing mechanism is composed of a mandrel and a sleeve set, and the mandrel and the sleeve are matched by bearings; the mandrel and the sleeve are respectively connected with the base and the column.

Furthermore, the said slewing mechanism is a slewing support bearing.

Further, the first wire tightener and the second wire tightener are manual winches.

Further, a set of long fixing holes for connecting the device housing is provided on the base.

The utility model has the advantages of simple structure, small size, light weight, and convenient carrying and transportation. The device is directly fixed on the outer shell of the on-load tap changer, and the hoisting operation is stable and reliable. The device controls the boom through the boom adjustment mechanism. The expansion and contraction, combined with the slewing structure to do 360-degree rotation, greatly increases the operational flexibility and facilitates the core body of the on-load tap-changer to be moved to the best working position. It is suitable for hoisting the core body of transformer on-load tap-changers of various specifications , Reduce the difficulty of operation and labor intensity, and effectively improve work efficiency.

The technical scheme of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Among the figure: 1, guide sleeve, 2, boom, 3, hoisting pulley, 4, sling, 5, hook, 6, column, 7, slewing mechanism, 8, base, 9, first wire tensioner, 10 , the second wire tensioner, 11, stay rope, 12, fixed pulley.

Example

As can be seen from Fig. 1, the utility model comprises a boom 2, a column 6, a base 8, a guide sleeve 1, a rotary mechanism 7, a lifting mechanism, and a boom adjustment mechanism; the guide sleeve 1 is horizontally fixed on the top of the column 6, and the lower end of the column 6 is rotated The mechanism 7 is connected with the base 8, and the rotary mechanism 7 is composed of a mandrel and a sleeve that are set together with each other. The mandrel and the sleeve are fixedly connected with the base 8 and the column 6 respectively; Cooperate (thrust self-aligning roller bearings can be used).

The slewing mechanism 7 can also adopt a slewing support bearing (that is, a turntable bearing) according to the situation, which can bear large axial and radial loads and overturning moments at the same time.

The base 8 is provided with a group of long fixing holes for connecting the switchgear housing.

The middle section of the boom 2 is inserted into the guide sleeve 1, and the boom 2 is slidingly matched with the guide sleeve 1;

The lifting mechanism and the boom adjustment mechanism are respectively located on both sides of the column 6; the lifting mechanism includes a first wire tensioner 9 and two hoisting pulleys 3, and the first wire tensioner 9 is fixed on the middle section of the column 6; the two hoisting pulleys 3 are respectively installed at the end of the hoisting section at the front of the boom 2 and the upper section of the column 6; the hoisting rope 4 bypasses the two hoisting pulleys 3, one end of the hoisting rope 4 is provided with a hook 5, and the other end is connected to the first wire tensioner 9 connect;

The boom adjustment mechanism includes a second wire tensioner 10 fixed on the middle section of the column 6 and a fixed pulley 12 fixed on the upper section of the column 6. The stay rope bypasses the fixed pulley 12, and the two ends are connected with the rear end of the boom 1 and the adjustment mechanism respectively. The second tensioner 10 is connected.

The first wire tightener 9 and the second wire tightener 10 are commercially available manual winch products with self-locking function.

When in use, first use the screw holes above the switchgear housing to fix the base 8, connect the lifting device with the shell of the on-load tap-changer equipment, adjust the position of the boom 2, and make the lifting section of the boom 2 The end (hanging position of the hook) is located in the center of the opening of the switchgear housing, that is, directly above the core of the on-load tap-changer; connect the core with the lifting rope, and turn the winch handle to complete the lifting operation.

When the core body of the on-load tap-changer is completely separated from the equipment casing, turn the column 6 to move the core body to the side of the casing opening; or according to the site conditions, use the handle of the second wire tensioner 10 to tighten the pull rope and pull the boom 2 Make the hoisting section extend further (the right section of the boom in the figure), and the hoisting point is away from the opening of the shell; Recover under the joint force of the suspension section and the horizontal section of the first wire tensioner sling (that is, the hoisting section is shortened) until the core is directly above the opening of the equipment shell, and stop releasing the pull rope; then loosen the first wire tensioner sling Rope, so that the core slowly enters the shell. During the above lifting process, the weight of the tap changer core body is completely carried by the device. Since the lifter and the shell of the on-load tap changer equipment to be repaired are fixed together, there is no relative displacement between the lifting point (winch) and the equipment to be repaired, so During the whole lifting process, the core body of the switchgear can be hoisted quickly, vertically and smoothly, avoiding the small swing of the core body and the collision damage to the inner wall of the shell. During the operation, it should be noted that when the boom 2 stretches, the position of the core body changes accordingly, and a margin needs to be reserved to prevent it from accidentally touching the ground and being damaged.

Finally, it should be noted that: the above examples are used to illustrate the technical solution of the utility model rather than to limit it. Those skilled in the art can modify the implementation or equivalently replace some technical features without departing from the technology of the utility model. The essence of the scheme should be covered within the scope of protection required by the utility model.

Claims (5)

1. a single arm type load ratio bridging switch core body lifting appliance, is characterized in that: comprise arm (2), column (6), base (8), orienting sleeve (1), swing type mechanism (7), derricking gear, arm regulating mechanism; Orienting sleeve (1) is horizontally fixed on column (6) top, and column (6) lower end is connected with base (8) by swing type mechanism 7; The stage casing of arm (2) is inserted in orienting sleeve (1), arm (2) and orienting sleeve (1) bearing fit;

Described derricking gear and arm regulating mechanism lay respectively at the both sides of column (6); Derricking gear comprises the first turnbuckle (9) and two liftings pulley (3), and the first turnbuckle (9) is fixed on column (6) stage casing; Two liftings pulley (3) are arranged on the epimere of the anterior lifting segment end of arm (2) and column (6) respectively; Lifting rope (4) walks around two liftings pulley (3), and one end of lifting rope (4) is provided with suspension hook (5), and the other end is connected with the first turnbuckle (9);

Arm regulating mechanism comprises the second turnbuckle (10) being fixed on column (6) stage casing and the fixed pulley (12) being fixed on column (6) epimere, fixed pulley (12) walked around by stay cord, and two ends are connected with the rear end of arm (1) and second turnbuckle (10) of regulating mechanism respectively.

2. a kind of single arm type load ratio bridging switch core body lifting appliance according to claim 1, is characterized in that: described swing type mechanism (7) is made up of mandrel and sleeve set, passes through bearing fit between mandrel and sleeve; Mandrel, sleeve are connected with base (8) and column (6) respectively.

3. a kind of single arm type load ratio bridging switch core body lifting appliance according to claim 1, is characterized in that: described swing type mechanism (7) is pivoting support bearing.

4. a kind of single arm type load ratio bridging switch core body lifting appliance according to claim 1, is characterized in that: described the first turnbuckle (9) and the second turnbuckle (10) are hand winch.

5., according to a kind of single arm type load ratio bridging switch core body lifting appliance in Claims 1-4 described in any one claim, it is characterized in that: described base (8) is provided with one group of long fixed orifice for connecting device housing.