CN208441770U - A kind of combination ladder - Google Patents

Abstract

The utility model discloses a kind of combination ladder, including at least two section ladders, each ladder are successively hinged and connected, and each ladder includes that two side bars and several between two side bars step on beam；It further include supporting beam, the supporting beam is equipped with several for fixing the installation position of arrester；Under trystate, ladder described at least two sections is supported in operating surface, and the supporting beam, which can be erected at, to be supported in the described of ladder described at least two sections of operating surface and step on beam.The there is provided combination ladder of the utility model is in addition to having the function of to ascend a height, additionally it is possible to carry out experimental test to the performance of arrester, and can guarantee the safety of arrester positions in test process reliability, test process, and then the accuracy of experimental test result can be improved.

Description

A kind of combination ladder

Technical field

The utility model relates to technical field of electric equipment more particularly to a kind of have both to ascend a height and arrester test function Combination ladder.

Background technique

Electric equipments of the arrester as electric system, are connected between cable and the earth, usually with protected Equipment is arranged in parallel, and can effectively limit the Overvoltage Amplitude of power grid, it is ensured that power transmission and transforming equipment is damaged from overvoltage, and then is guaranteed The safe and stable operation of electric system.

It is provided according to regulation, whether arrester needs to carry out the correlation tests such as insulation resistance, direct current, sent out inside it with measuring The defects of whether raw dampness, insulator crack.Arrester is usually mounted in outdoor switchgear, in test, need by Arrester takes out from cabinet body, and arrester is tested at scene outdoors.

However, the condition at outdoor scene and different, currently, again without the dedicated test branch being supported to arrester Object is supportted, testing crew is usually all that interim object is used to be supported arrester to complete to test.It, cannot using interim object It is enough that arrester is reliably fixed, be easy to appear in test arrester topple over, imperfect earth, situations such as discharging over the ground, This not only affects the accuracy of data test, cannot guarantee that the safety of test carries out.

Therefore, how a kind of test equipment that is novel, can meeting arrester test request is provided, is still this field Technical staff's technical problem urgently to be resolved.

Utility model content

The purpose of the utility model is to provide a kind of combination ladders, and the combination ladder is other than having the function of to ascend a height, additionally it is possible to right Arrester is tested, and test process is safe and reliable, and the accuracy of test result is higher.

In order to solve the above technical problems, the utility model provides a kind of combination ladder, including at least two section ladders, each ladder Frame is successively hinged and connected, and each ladder includes that two side bars and several between two side bars step on beam；Further include Supporting beam, the supporting beam are equipped with several for fixing the installation position of arrester；Under trystate, ladder branch described at least two sections It supports in operating surface, the supporting beam, which can be erected at, to be supported in the described of ladder described at least two sections of operating surface and step on beam.

The there is provided combination ladder of the utility model further includes supporting beam in addition to having the function of conventional ladder and ascending a height, the branch Support beam can be erected at the stepping on beam of at least two section ladders for being supported in operating surface, so that supporting beam can be protected with operating surface Certain height is held, and the supporting beam is additionally provided with several installation positions for being capable of fixing arrester.

During the test, combination ladder can be opened first, corresponding ladder is supported in the operating surfaces such as ground, and set up Then arrester is fixed on the installation position of supporting beam by supporting beam.Since the installation position is the positioning being arranged for arrester Structure, compared with the prior art in temporary support object, combination ladder provided by the utility model can more guarantee arrester Reliable location, topple over to avoid arrester during test, and then guarantee the good earth of arrester；And it is at this point, lightning-arrest Device and operating surface have had certain height, also the high-potting line being connected with arrester can largely be avoided to put over the ground Electricity.

In other words, the provided combination ladder of the utility model, can either when the performance to arrester carries out experimental test Guarantee the reliability of arrester positioning, and can guarantee the safety of test process, and then the standard of experimental test result can be improved True property.

More importantly the transformer equipments basis usually all with higher such as switchgear where arrester, to keeping away When thunder device is installed, overhauled or tested, just needs to carry the equipment such as combination ladder originally and ascend a height.That is, this reality With it is novel it is provided can not increase new equipment to the equipment that arrester is tested, but in original combination Supporting beam is additionally arranged on the basis of ladder, to realize new function, supporting beam occupied space is smaller, and it is easy to carry, it will not be too much Increase the burden of testing crew trip, there is great practicability, be more convenient for promoting the use of.

Optionally, the axial ends of the supporting beam is equipped with clamping portion, under trystate, the clamping portion can and branch It supports and steps on beam clamping described in the ladder of operating surface.

Optionally, the clamping portion is groove type plate.

Optionally, the side bar of at least one ladder is equipped with several hanging columns, and the hanging column and the beam of stepping on are distinguished It is set to the opposite two sidewalls of the side bar；The supporting beam can be mounted on the hanging column with its installation position.

Optionally, the hanging column includes cylinder, and one end of the cylinder is connected with the side bar, and the other end is equipped with large scale Portion.

Optionally, the installation position is in groove profile or pass.

Optionally, the ladder for being supported in operating surface is equipped with telescopic joint.

Optionally, the telescopic joint is slideably plugged in the side bar of the corresponding ladder.

Optionally, the supporting beam and each ladder are isolation material.

The utility model also provides a kind of combination ladder, including at least three-section ladder frame, and each ladder is successively hinged and connected, and Each ladder includes that two side bars and several between two side bars step on beam；It further include supporting beam, the supporting beam Equipped with several for fixing the installation position of arrester；Under trystate, ladder described in an at least section is vacantly arranged, the supporting beam The described of the ladder being vacantly arranged can be erected at and step on beam.

Detailed description of the invention

Fig. 1 is provided the structural schematic diagram that combination ladder is under trystate by the utility model；

Fig. 2 is the front view of Fig. 1；

Fig. 3 is provided the structural schematic diagram that combination ladder is under folded state by the utility model；

Fig. 4 is the top view of Fig. 3；

Fig. 5 is the rearview of Fig. 3.

The reference numerals are as follows in Fig. 1-5:

Beam, 13 telescopic joints are stepped in 1 ladder, 11 side bars, 111 hanging columns, 12；

2 supporting beams, 21 installation positions, 22 clamping portions.

Specific embodiment

In order to make those skilled in the art more fully understand the technical solution of the utility model, with reference to the accompanying drawing and have The utility model is described in further detail for body embodiment.

It is described herein it is " several " be that exponential quantity is uncertain multiple, it is usually more than two；And when using " several " table When showing the quantity of certain several component, do not necessarily mean that the quantity of these components is identical.

Embodiment 1

Fig. 1-5 is please referred to, Fig. 1 is provided the structural schematic diagram that combination ladder is under trystate, Fig. 2 by the utility model For the front view of Fig. 1, Fig. 3 is provided the structural schematic diagram that combination ladder is under folded state, Fig. 4 Fig. 3 by the utility model Top view, Fig. 5 be Fig. 3 rearview.

As shown in Figure 1 and Figure 2, the utility model provides a kind of combination ladder, including at least two section ladders 1, and each ladder 1 is successively It is hinged and connected.Each ladder 1 may each comprise two side bars 11 and several between two side bars 11 step on beam 12, and two side bars 11 can be with It is parallel to each other, can also be arranged in angle, setting can be spaced between two side bars 11 by respectively stepping on beam 12, preferably be set at equal intervals It sets.

In use, the combination ladder can be opened, so that the operating surfaces such as at least two ladders 1 and ground mutually support, in turn Realization is ascended a height function.Under such state, the shape of combination ladder is related with the quantity of ladder 1, if it exists two ladders 1, and wherein The middle part of one ladder 1 and another ladder 1 is hinged, and the combination ladder of opening can be in herringbone, and if two ladders 1 are end hinge It connects, then the combination ladder can be in " ∧ " shape；Three ladders 1 if it exists, then the combination ladder can substantially be in " ︹ " shape, such as Fig. 2 institute Show, positioned at two sides ladder 1 can with to be located in the middle ladder 1 perpendicular, can also be arranged in other angles；Four if it exists Ladder 1, then the combination ladder can substantially be in M shape.In the following description, mainly with combination ladder composed by three ladders 1 For, the structure of combination ladder provided to the utility model is described.When not in use, can to above-mentioned each ladder 1 into Row folds, and the combination ladder is converted into approximate slab shape, to reduce the occupied space of the combination ladder, to be convenient for carrying.

The there is provided combination ladder of the utility model further includes supporting beam 2, which is equipped with several for fixing arrester Installation position 21.

At the test condition, the combination ladder can be opened first, corresponding ladder 1 is supported in operating surface, and set up Then arrester is fixed on the installation position 21 of supporting beam 2 by supporting beam 2.Since the installation position 21 is to be arranged for arrester Location structure, compared with the prior art in temporary support object, combination ladder provided by the utility model can more guarantee The reliable location of arrester is toppled over to avoid arrester during test, and then guarantees the good earth of arrester；And this When, arrester and operating surface have had certain height, can also largely avoid the high-potting being connected with arrester Line discharges over the ground.

In other words, the provided combination ladder of the utility model, can either when the performance to arrester carries out experimental test Guarantee the reliability of arrester positioning, and can guarantee the safety of test process, and then the standard of experimental test result can be improved True property.

More importantly the transformer equipments basis usually all with higher such as switchgear where arrester, to keeping away When thunder device is installed, overhauled or tested, just needs to carry the equipment such as combination ladder originally and ascend a height.That is, this reality With it is novel it is provided can not increase new equipment to the equipment that arrester is tested, but in original combination Supporting beam 2 is additionally arranged on the basis of ladder, to realize new function, 2 occupied space of supporting beam is smaller, and it is easy to carry, it will not be excessive Ground increases the burden of testing crew trip, has great practicability, is more convenient for promoting the use of.

Using Fig. 2 as visual angle, for ease of description, the ladder 1 for being located at two sides can be referred to as cat ladder frame, ladder will be located in the middle Frame 1 is referred to as horizontal ladder, and two cat ladder framves are equivalent to stabilizer blade, and for being supported to horizontal ladder, under trystate, supporting beam 2 can To be set up in the stepping on beam 12 of two cat ladder framves.

It may be noted that the utility model embodiment does not limit height of the supporting beam 2 apart from operating surface under trystate, i.e., Supporting beam 2 is not limited and is specifically erected at which grade of cat ladder frame from bottom to top is stepped on beam 12, and supporting beam 2 can be set in the first order Step on beam 12, stepping on beam 12 in the second level or other grades, in the specific implementation, those skilled in the art also can be set It can require to be set according to actual tests.

Preferably supporting beam 2 is arranged for the present embodiment steps on beam 12 higher, and supporting beam 2 is kept with operating surface Bigger distance can further improve examination to avoid the high-potting line being connected with arrester to discharge over the ground to a greater degree The safety tested.

As shown in figure 3, and combine Fig. 1, Fig. 2, clamping portion 22 can be set in the axial ends of supporting beam 2, in test shape Under state, clamping portion 22 can be mutually clamped with the beam 12 of stepping on for the ladder 1 for being supported in operating surface, to improve supporting beam 2 and corresponding ladder 1 Connection reliability, be more advantageous to ensure arrester reliable location.

Meanwhile the supporting beam 2 can also play the role of stable combination ladder, as shown in Fig. 2, due to supporting beam 2 and cat ladder The presence of clamping structure between frame can stop two cat ladder framves relative to the further rotation of hinge joint, and then can promote the combination ladder Stability in use.

Specifically, above-mentioned clamping portion 22 can be groove type plate, under trystate, which, which can be fastened on, steps on beam 12 On, in this way, clamping portion 22 can produce abutting to the inner face and outer end face of stepping on beam 12 (i.e. cat ladder frame), to limit cat ladder frame phase Outside or inside counterclockwise rotation clockwise to hinge joint, so as to ensure the stabilization of the combination ladder during the test Property.Above-mentioned "inner", "outside" bearing definition be based on the orientation and positional relationship in Fig. 2, in Fig. 2, with the horizontal ladder of insulating ladder Vertical central axes on the basis of, each cat ladder frame can be referred to as inner face close to the end face of central axes, far from central axes end face It can be referred to as outer end face, by taking the cat ladder frame in left side in Fig. 2 as an example, the right side of the cat ladder frame is inner face, and left side is outer end Face.

Alternatively, above-mentioned clamping portion 22 or it is set to the snap-gauge of 2 lower end surface of supporting beam, and under trystate, cat ladder frame One of the inner face and outer end face of (stepping on beam 12) can offset with the snap-gauge, so can limit cat ladder frame along clockwise or The rotation of a direction that person is counterclockwise equally can improve to a certain extent the stability of combination ladder, and ensure supporting beam 2 with Combination ladder is reliably connected.

It is to be appreciated that the above-mentioned description as described in clamping structure is only supporting beam 2 and the one kind for stepping on connection structure between beam 12 Exemplary description, can not be as the restriction of the practical range to the provided combination ladder of the utility model；In fact, full Under conditions of sufficient function, supporting beam 2 and step between beam 12 and can also be attached using other structures, for example, supporting beam 2 with step on It can also be fixed using connectors such as screw, ropes between beam 12.

In fact, for combination ladder, it is typically provided with position limiting structure between two ladders 1 that are hinged, with limit The slewing area of two ladders 1 is made, and positions the relative position of two ladders 1 in special angle setting, and then can ensure combination ladder Stability in use.

That is, even without supporting beam 2 above-mentioned and stepping on the clamping structure between beam 12, it is generally the case that cat ladder Reliable location equally may be implemented between frame and horizontal ladder.In this way, supporting beam 2 even can directly be overlapped in stepping on for two cat ladder framves On beam 12, as long as guaranteeing that the relative position of supporting beam 2 is constant, does not influence the accuracy of test result at the test condition.

After the end of the test, above-mentioned supporting beam 2 can be removed from combination ladder, and the supporting beam 2 is packed up into independent storage, Alternatively, the supporting beam 2 can also mutually be fixed with the combination ladder, and then the supporting beam 2 is stored together with combination ladder.In this reality Apply in example, it is preferred to use the scheme of the latter, i.e., the scheme stored supporting beam 2 together with combination ladder, with convenient transportation, storage and It uses.

In specific scheme, several hanging columns 111 can be set in the side bar 11 of at least one ladder 1, in off-test Afterwards, supporting beam 2 can be mounted on corresponding hanging column 111 with its installation position 21.So, on the one hand, can further reduce does not make The occupied space of the used time combination ladder, in order to transport, store；On the other hand, additionally it is possible to largely avoid supporting beam 2 The situation of supporting beam 2 is left behind when loss and outgoing test, with convenient to use.

As shown in figure 4, each hanging column 111 can be oppositely arranged with beam 12 is stepped on, i.e., hanging column 111, step on beam 12 and can be respectively set In the opposite two sidewalls of side bar 11.That is, each hanging column 111 is not to be installed on the face of trampling of combination ladder (side bar 11 and to step on beam 12 are formed by plane) on, the normal use of combination ladder will not be impacted.

Specifically, which may include cylinder, and one end of the cylinder can be connected with side bar 11, and the other end can To be equipped with large scale portion, large scale portion can installation position 21 to supporting beam 2 carry out detent, to avoid supporting beam 2 along hanging column 111 Axial direction fall off from the hanging column 111.The hanging column 111 is specifically as follows the connectors such as bolt, screw, nail, correspondingly, the connection The head of part is that is, large scale portion above-mentioned.

Above-mentioned installation position 21 can be in specifically groove profile or pass, by taking groove profile as an example, as shown in figure 5, supporting beam 2 can be with The opening of its groove profile installation position 21 is plugged in hanging column 111, until hanging column 111 and the bottom of groove profile offset.

Further, the ladder 1 for being supported in operating surface of the provided combination ladder of the utility model is also provided with telescopic joint 13, the length of the ladder 1 mutually supported with operating surface can be adjusted by the telescopic joint 13, and then the installation for adjusting supporting beam 2 is high Degree to guarantee that test installation site and the operating surface of arrester have height enough, and then guarantees that the safety of testing experiment carries out.

In addition, when the provided combination ladder of the utility model is applied to the operating surface of the out-of-flatnesses such as slope surface, above-mentioned telescopic joint 13 setting can also be used to leveling supporting beam 2, so that supporting beam 2 is in horizontality as far as possible, to facilitate zinc oxide surge arresters, together When, it is more favorable to guarantee being reliably connected for arrester and supporting beam 2, avoids toppling over for arrester during testing.

The side bar 11 of telescopic joint 13 and corresponding ladder 1 can be by the way of being slidably connected.Specifically, can be by telescopic joint 13 are plugged in inside side bar 11, alternatively, side bar 11 can also be plugged in telescopic joint 13, it can between telescopic joint 13 and side bar 11 Position limiting structure is arranged, easily to adjust the length that telescopic joint 13 stretches out side bar 11；When not needing using the telescopic joint 13, 13 entirety of telescopic joint can be retracted in side bar 11.

In the present embodiment, the side bar 11 of combination ladder, step on beam 12 and supporting beam 2 can using hollow tubular structure, Solid rod-shaped or plate structure can also be used, can be specifically configured according to actual needs.Each side bar 11 steps on beam 12 and branch Supportting beam 2 can be prepared using insulating materials, i.e., the provided combination ladder of the utility model is insulating ladder, it is ensured that safe handling； The insulating materials is specifically as follows the glass reinforced plastic etc. of high rigidity, high insulating property, it is of course also possible to for other insulation such as timber Material.

Embodiment 2

The utility model additionally provides another form of combination ladder, the structure with involved combination ladder in embodiment 1 Substantially similar, difference is, in the present embodiment, which can be erected at the stepping on beam 12 of the ladder 1 being vacantly arranged.

The ladder 1 of " hanging setting " refers to that none position of ladder 1 is mutually supported with operating surface, is reflected in Fig. 2, the ladder Frame 1 refers to centrally located horizontal ladder, and supporting beam 2 can be set up in above the horizontal ladder.At this point, supporting beam 2 and operation Biggish distance can also be kept between face, equally be can be realized and improved the reliability of arrester positioning, ensure test process Safety and improve test result accuracy technical effect.

In the present embodiment, the quantity of ladder 1 is three or more, so that wherein at least one ladder 1 can vacantly be set It sets, and the ladder 1 at least two that other ladders 1 are then used to support, and are used to support.In the present embodiment combination ladder other Structure and effect description, can refer to embodiment 1, this will not be repeated here.

Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications Also it should be regarded as the protection scope of the utility model.

Claims (10)

1. A combined ladder, comprising at least two ladder frames (1), each of the ladder frames (1) is hingedly connected in turn, and each of the ladder frames (1) includes two side beams (11) and is provided in two A plurality of tread beams (12) between the side beams (11), characterized in that it further comprises a support beam (2), and the support beam (2) is provided with a plurality of installation positions (21) for fixing the arrester; In the test state, at least two sections of the ladder frame (1) are supported on the operation surface, and the support beams (2) can be erected on the tread beams ( 12). 2 . The combined ladder according to claim 1 , wherein the two axial ends of the support beam ( 2 ) are provided with clamping parts ( 22 ), and in the test state, the clamping parts ( 22 ) can It is clamped with the tread beam (12) of the ladder frame (1) supported on the operation surface. 3 . The combined ladder according to claim 2 , characterized in that, the clamping portion ( 22 ) is a grooved plate. 4 . 4. The combination ladder according to any one of claims 1 to 3, wherein the side beam (11) of at least one of the ladder frames (1) is provided with a plurality of hanging columns (111), and the hanging columns (111) The column (111) and the tread beam (12) are respectively arranged on two opposite side walls of the side beam (11); The support beam (2) can be attached to the hanging column (111) at its installation position (21). 5 . The combined ladder according to claim 4 , wherein the hanging column ( 111 ) comprises a column body, one end of the column body is connected with the side beam ( 11 ), and the other end is provided with a large-sized part. 6 . 6 . The combined ladder according to claim 4 , wherein the installation position ( 21 ) is in the form of a groove or a hole. 7 . 7. The combination ladder according to claim 4, characterized in that, the ladder frame (1) supported on the operation surface is provided with a telescopic joint (13). 8 . The combined ladder according to claim 7 , wherein the expansion joints ( 13 ) are slidably inserted into the side beams ( 11 ) of the corresponding ladder frames ( 1 ). 9 . 9 . The combined ladder according to claim 4 , wherein the support beam ( 2 ) and each of the ladder frames ( 1 ) are made of insulating material. 10 . 10. A combined ladder, comprising at least three sections of ladder frames (1), each of the ladder frames (1) is hingedly connected in sequence, and each of the ladder frames (1) includes two side beams (11) and A plurality of tread beams (12) between the side beams (11), characterized in that it further comprises a support beam (2), and the support beam (2) is provided with a plurality of installation positions (21) for fixing the arrester; In the test state, at least one section of the ladder frame (1) is suspended, and the support beam (2) can be erected on the tread beam (12) of the suspended ladder frame (1).