CN219195970U

CN219195970U - Pit arm support

Info

Publication number: CN219195970U
Application number: CN202223138197.4U
Authority: CN
Inventors: 张家广; 张远泽
Original assignee: China Construction Communications Engineering Group Co Ltd
Current assignee: China Construction Communications Engineering Group Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-06-16
Anticipated expiration: 2032-11-25

Abstract

The application discloses a pit arm support. The pit arm support includes: a plurality of support sheets connected end to end in turn; wherein, the support sheet comprises a length-adjustable support sheet (001) and a length-fixed support sheet (002); the pit arm assembly is of a polygonal structure, wherein each side is provided with at least one length-adjustable support piece (001) according to any one of the above, and the pit arm assembly comprises a length-adjustable support column, wherein the support column comprises a length-adjustable ejector rod (003) and a length-fixed ejector rod (004). The pit arm support comprises square corner tubes, support plates and support posts. The protective support piece is applied to the protection scene of the pit arm, the protective support piece can be arranged according to the size of the pit under site construction, and the length of the protective support piece can be flexibly adjusted to adapt to the size of the site pit. In some special needs, the vertical pit arm can be effectively and rapidly supported and protected, and the personal safety of constructors and railway transportation safety are improved.

Description

Pit arm support

Technical Field

The application relates to the technical field of installation engineering, in particular to a pit arm support.

Background

In the related art, a longitudinal and transverse drainage ditch foundation pit between inner lines of a railway station and an electrified contact net pillar rectangular foundation pit are close to a line, large in depth and narrow in working face, and cannot be mechanically excavated, and can only be constructed in a manual vertical excavation mode. If the pit is deeper, the soil on the pit arm is likely to fall down and collapse, so that the personal safety hidden trouble is brought to operators.

Disclosure of Invention

The main object of the present application is to provide a pit arm bracket to solve the above problems.

In order to achieve the above object, according to one aspect of the present application, there is provided a pit arm support, including a plurality of support pieces connected end to end in sequence; wherein, the support sheet comprises a length-adjustable support sheet and a length-fixed support sheet;

the pit arm assembly is of a polygonal structure, wherein at least one length-adjustable support sheet as described in any one of the above is arranged on each side.

In one embodiment, the pit arm support further comprises a top rod assembly, wherein the top rod assembly is positioned in a closed area surrounded by the pit arm support, and two ends of the top rod assembly are respectively connected with two opposite sides of the pit arm support and used for supporting the pit arm support; the ejector rod assembly comprises a plurality of ejector rods which are sequentially connected end to end.

In one embodiment, the ejector pin comprises at least one length adjustable ejector pin as described in any one of the above.

In one embodiment, the device further comprises a plurality of square tubes and connectors; a square corner tube is arranged between any two adjacent sides of the pit arm assembly; two side vertical surfaces of the square corner tube are respectively connected with one end of an adjacent supporting piece; and a plurality of studs are respectively arranged on two adjacent side surfaces of the square pipe and are used for being connected with the adjacent support plates.

In one embodiment, the length-adjustable support sheet includes: a first outer jacket fixing member, a first inner jacket movable member;

the first casing fixing member includes: at least one first ribbed tube and a first fixed connection tube; one end of the first rib pipe is connected with the fixed end connecting pipe;

the first inner sleeve movable member includes: at least one second ribbed tube and a second fixed connection tube;

the first end of the second ribbed tube is inserted into the first ribbed tube through the other end of the first ribbed tube, and the inserted length is adjustable;

the second end of the second rib pipe is connected with the second fixed connecting pipe.

In one embodiment, the length-adjustable support further comprises a transmission mechanism; the transmission mechanism at least comprises: the power transmission shaft is sleeved with the first ratchet mechanism at the middle part of the power transmission shaft; the force transmission gears are respectively sleeved on the force transmission shafts;

a force transmission rack fixedly arranged on the second rib pipe of the first inner sleeve movable part, and the force transmission rack is matched with the force transmission gear;

the gear seat is respectively arranged on the first rib pipe of the first outer sleeve fixing part; the force transmission gear is arranged in the gear seat;

when the length is adjusted, the first ratchet mechanism drives the force transmission shaft to rotate, the force transmission shaft drives the force transmission gear to rotate, and the force transmission gear drives the force transmission rack to move, so that the first inner sleeve movable part is adjusted to extend or retract into the first outer sleeve fixed part, and the length of the length-adjustable support piece is adjusted.

In one embodiment, the number of first ribbed tubes is 3; the distances between two adjacent first ribbed pipes are equal; the gear seat and the force transmission gear are respectively arranged on the first side rib pipes at two sides;

the number of the second ribbed pipes is 3; the distance between two adjacent second ribbed pipes is equal; and force transmission racks are respectively arranged on the second side rib pipes at two sides.

In one embodiment, the first fixed connecting pipe and the second fixed connecting pipe are respectively provided with a plurality of connecting parts; each connecting portion is provided with a through hole for connection.

In one embodiment, the length adjustable jack includes: the first outer sleeve is used for fixing the ejector rod and the first inner sleeve is used for moving the ejector rod;

the first outer sleeve fixing ejector rod is of a hollow structure; the first end is provided with a connecting part which is used for connecting the support piece or the support column;

the first end of the first inner sleeve movable ejector rod is inserted into the first outer sleeve fixed ejector rod through the second end of the first outer sleeve fixed ejector rod; the insertion depth is adjustable so as to adjust the length of the length-adjustable top rod;

the second end of the movable ejector rod of the first inner sleeve is provided with a connecting part, and the connecting part is used for connecting adjacent struts or support sheets.

In one embodiment, the length adjustable ejector pin further includes a second transmission mechanism including: the second ratchet mechanism and the force transmission rack;

the second ratchet mechanism includes at least: the device comprises a gear, a gear seat, a ratchet shaft, a bidirectional ratchet, a handle lug and a handle;

the gear seat is fixedly arranged on the first outer sleeve fixing ejector rod; the gear is arranged on the gear seat, and the force transmission shaft is sleeved in the middle of the gear;

the bidirectional ratchet wheel is nested inside the handle ear; the ratchet shaft is sleeved in the middle;

the force transmission rack is fixed on the movable ejector rod of the first inner sleeve and is matched with the teeth of the gear;

when the bidirectional ratchet wheel is used, the handle is rotated, and the handle drives the bidirectional ratchet wheel to rotate; the bidirectional ratchet wheel drives the ratchet wheel shaft to rotate, the ratchet wheel shaft drives the gear to rotate, and the gear drives the force transmission rack to move; the force transmission rack drives the movable ejector rod of the first inner sleeve to extend into or out of the fixed ejector rod of the first outer sleeve so as to adjust the length of the length-adjustable support column.

The pit arm support is applied to the scene of pit arm protection, the protection support piece can be arranged according to the pit size of field construction, the length of the protection support piece can be flexibly adjusted, and the size of the field pit is adapted. The support post can be arranged, and the ejector rod with adjustable length is arranged in the support post, so that the firmness of the whole support is improved. In some special needs, for example, in the scenes of a longitudinal and transverse drainage ditch foundation pit between inner lines of a railway station and an electrified contact net pillar rectangular foundation pit, the vertical pit arm can be effectively and rapidly supported and protected, and the personal safety of constructors and railway transportation safety are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:

FIG. 1 is a top view of a pit arm bracket according to an embodiment of the present application;

FIG. 2A is a front view of a square tube and connector according to an embodiment of the present application;

FIG. 2B is a top view of a square tube and connector according to an embodiment of the present application;

FIG. 3 is a schematic illustration of a length adjustable support according to an embodiment of the present application;

FIG. 4 is a top view of a length adjustable buttress according to an embodiment of the present application;

FIG. 5 is a top view of another length adjustable support tab according to an embodiment of the present application;

FIG. 6 is an end view of another length adjustable support tab according to an embodiment of the present application;

FIG. 7 is an end view of another length adjustable support tab according to an embodiment of the present application;

FIG. 8 is a side view of another length adjustable support tab according to an embodiment of the present application;

FIG. 9 is a top view of a length fixing clip according to an embodiment of the present application;

FIG. 10 is a top view of a length adjustable ejector pin according to an embodiment of the present application;

FIG. 11A is a front view of a length adjustable ejector pin according to an embodiment of the present application;

FIG. 11B is a side view of a length adjustable ejector pin according to an embodiment of the present application;

FIG. 12A is a partial elevation view of a length adjustable ejector pin according to an embodiment of the present application;

FIG. 12B is a partial side view of a length adjustable ejector pin according to an embodiment of the present application;

FIG. 13 is a schematic view of a stop mechanism according to an embodiment of the present application;

FIG. 14A is a front view of a grooved, length adjustable ejector pin according to an embodiment of the present application;

FIG. 14B is a side view of a grooved, length adjustable ejector pin according to an embodiment of the present application;

FIG. 15A is a front view of a fixed-length ejector pin according to an embodiment of the present application;

FIG. 15B is a top view of a fixed-length ejector pin according to an embodiment of the present application;

FIG. 16A is an elevation view of a slotted length fixed ejector pin according to an embodiment of the present application;

fig. 16B is a side view of a grooved length fixed ejector pin in accordance with an embodiment of the present application.

Description of the reference numerals

001-length adjustable support; 002-length fixing support piece; 003-length adjustable ejector rod; 004-fixed ejector rod in length; 005-square tube; 0051-a connector; 11-a first casing fixing part; 111-a first ribbed tube; 112-a first fixed connection pipe; 113-reinforcing the tube; 1121-a connection; 11211-a through hole; 12-a first inner sleeve movable member; 121-a second ribbed tube; 122-a second fixed connection tube; 1221-a connection; 12211-a through hole; 13-a first transmission mechanism; 131-a force transmission shaft; 132-a first ratchet mechanism; 1321-check ratchet; 1322-a first bidirectional ratchet; 1323-a second bidirectional ratchet; 133-force transmission gear; 134-force transmission rack; 135-a gear seat; 136-ratchet seat; 137-check pawl; 21-a third ribbed tube; 22-a third fixed connection pipe; 221-a connection; 2211-a through hole; 23-supporting rods; 71-a first coat fixed ejector rod; 72-a first inner sleeve movable ejector rod; 73-connecting part; 731-a through hole; 74-a second transmission; 741-a second ratchet; 7411-gears; 741111-check pawls; 7417-stop seats; 7418-detent pawl shaft; 7412-gear seat; 7413-handles; 7414-handle ears; 742-force transmission rack; 7415-reversing handles; 7416-ratchet shafts; 75-groove; 76-reinforcing rib plates; 1101-ejector pin; 1102-a connection; 1103-stiffener; 1104-groove.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In a first aspect, the present application proposes a pit arm support, see fig. 1, which includes a plurality of support pieces connected end to end in sequence; wherein, the support sheet comprises a length-adjustable support sheet 001 and a length-fixed support sheet 002; the pit arm assembly is of a polygonal structure, wherein at least one length-adjustable support sheet 001 as described in any one of the above is arranged on each side.

In some embodiments, the pit arm support is quadrilateral, and at least one length-adjustable support piece 001 is arranged on each side.

The above-mentioned hole arm support of this application is owing to set up at least one adjustable piece 001 of length to can adjust the length of this adjustable piece 001 of length according to the size of hole arm, thereby can guarantee the fastness of support, accomplish the support task. In the prior art, the sizes of the tunnels are not uniform in the actual construction scene, and no standard support is used for protection, so that accidents are very easy to occur when the tunnels are deeper. By adopting the pit arm support, the probability of accident occurrence can be greatly reduced, and the safety of workers on a construction site is improved.

In some embodiments, the pit arm support further comprises a top rod assembly, wherein the top rod assembly is positioned in a closed area surrounded by the pit arm support, and two ends of the top rod assembly are respectively connected with two opposite sides of the pit arm support and used for supporting the pit arm support; the ejector rod assembly comprises a plurality of ejector rods which are sequentially connected end to end.

Preferably, the ejector rod assembly at least comprises one length-adjustable ejector rod.

Illustratively, as shown, the ram assembly includes one of the length adjustable ram 003 and the length fixed ram 004 described above.

In some embodiments, a plurality of square tubes 005 and a connection 0051 are also included. A square corner tube 005 is arranged between any two adjacent sides of the pit arm assembly; two side elevation of square angle pipe 005 connect the one end of adjacent piece respectively.

As shown in fig. 2A and 2B, in some embodiments, a plurality of square tubes 005 and studs 0051 are also included; a square corner tube 005 is arranged between any two adjacent sides of the pit arm assembly; two side elevation surfaces of the square corner tube 005 are respectively connected with one end of an adjacent supporting piece; a plurality of studs 0051 are respectively arranged on two adjacent side surfaces of the square tube 005, and the studs 0051 are used for being connected with adjacent support pieces. When in connection, the stud 0051 passes through the through hole of the connection part of the support piece, and is then locked by a nut. The distance between any two adjacent studs may be set to be the same. As shown, the number of studs that can be provided on each side is 4.

In some embodiments, the square corner tube 005 may stand at the corner of the foundation pit, 100 x 100 square steel tube may be used, and the height may be set to 0.5 meters.

The two support sheets are arranged between square corner tubes, can be made of 50 gamma-100 flat steel tubes, and have the height of 0.5 m, and are connected by bolts; the length of the length-fixed support sheet can be set to be 0.5 meter, 0.7 meter and 1 meter, and the length of the first inner sleeve movable part 12 of the length-adjustable support sheet when not extending can be set to be 0.5 meter, 0.7 meter and 1 meter, and the length of the first inner sleeve movable part 12 after extending is set to be 0.5+0.15 meter, 0.7+0.25 meter and 1+0.3 meter.

In one embodiment, referring to fig. 3, the length-adjustable support 001 comprises: a first outer jacket fixing member 11, a first inner jacket movable member 12.

In some embodiments, the first outer fixing member 11 and the first inner movable member 12 may be formed by splicing a plurality of hollow rigid pipes.

The first casing fixing member 11 includes: at least one first rib tube 111 and a first fixed connection tube 112; one end of the first ribbed tube 111 is connected to the fixed connection tube 112, and the other end is opened; the first inner housing movable member 12 includes: at least one second rib pipe 121 and a second fixed connection pipe 122; the first end of the second ribbed tube 121 is inserted into the first ribbed tube 111 through the other end of the first ribbed tube 111, and the inserted length is adjustable; a second end of the second ribbed tube 121 is connected to the second fixed connection tube 122.

In some embodiments, the number of the first ribbed pipes may be plural. When the number of the first rib pipes 111 is plural, the plural first rib pipes 111 may be disposed in parallel. The number of the second ribbed pipes 121 may be the same as the number of the first ribbed pipes 111, and the second ribbed pipes 121 may be disposed in one-to-one correspondence with the first ribbed pipes 111. That is, each of the second ribbed tubes 121 is inserted into a corresponding one of the first ribbed tubes 111, respectively.

In one embodiment, referring to fig. 4, when the number of the first rib pipes 111 is plural, the first sleeve fixing part 11 further includes a reinforcing pipe 113 disposed between two adjacent first rib pipes 111 to serve as a reinforcing support.

The length-adjustable support piece provided by the application is characterized in that the first inner sleeve movable part 12 is movably arranged in the first outer sleeve fixed part 11, the length of the support piece can be adjusted by adjusting the first inner sleeve movable part 12 relative to the first outer sleeve fixed part 11, the support piece can be used in a field of pit arm protection, the protection support piece can be arranged according to the size of a pit under site construction, the length of the protection support piece can be flexibly adjusted to adapt to the size of a site pit, and the support piece can effectively and quickly support and protect a vertical pit arm in a special required scene, such as a scene of a longitudinal and transverse drainage ditch among railway station inner lines and an electrified contact net support rectangular foundation pit, so that the personal safety and railway transportation safety of constructors are improved.

In some ways, the manner of adjusting the insertion depth may be achieved by a connecting piece, and a plurality of through holes are respectively formed on the corresponding first rib pipe 111 and the second rib pipe 121, and the distance between two adjacent through holes may be flexibly set, for example, set to 2 cm, 3 cm, 4 cm, or 5 cm. Of course, the smaller the interval is, the more favorable is for finely adjusting the length of the whole length-adjustable support piece. The connecting piece can be used for connection, and the connecting piece can be a bolt and a nut.

In one embodiment, the insertion depth can be adjusted by a transmission mechanism, see fig. 5 and 6, in which embodiment the length-adjustable support piece further comprises a transmission mechanism 13, and the transmission mechanism 13 at least comprises: the power transmission shaft 131 is sleeved with a first ratchet mechanism 132 at the middle part of the power transmission shaft 131; and the force transmission gears 133 are respectively sleeved on the force transmission shafts 131. A force transmission rack 134 fixedly arranged on the second rib pipe 121 of the first inner sleeve movable part 12, wherein the force transmission rack 134 is in matched contact engagement with the force transmission gear 133.

A gear seat 135 provided on the first rib pipe 111 of the first outer sheath fixing member 11; the force transmitting gear is disposed in the gear seat 135.

When the length is adjusted, the first ratchet mechanism 132 drives the force transmission shaft 131 to rotate, the force transmission shaft 131 drives the force transmission gear 133 to rotate, and the force transmission gear 133 drives the force transmission rack 134 to move, so that the second rib pipe 121 of the first inner sleeve movable part 12 is adjusted to extend or retract into the first rib pipe 111 of the first outer sleeve fixed part 11, and the length of the length-adjustable support piece is adjusted.

When the number of the first rib pipes 111 and the number of the second rib pipes 121 are one, the number of the gear seat 135, the force transmission gear 133 and the force transmission rack 134 is one. When the number of the first ribbed tubes 111 and the number of the second ribbed tubes 121 are plural, the number of the gear seat 135, the force transmission gear 133 and the force transmission rack 134 may be plural, for example, the number may be set to be one-to-one corresponding to the number of the ribbed tubes, or the number may be two, and the number may be set to be two, and may be set only on the side ribbed tubes.

In some embodiments, referring to fig. 5, the number of the first rib pipes 111 is 3, and the distances between two adjacent first rib pipes 111 are equal. The gear seat 135 and the force transmission gear 133 are respectively provided on the first side rib pipes 111 on both sides.

The number of the second ribbed pipes 121 is 3, and the distances between two adjacent second ribbed pipes 121 are equal. Force transmission racks 134 are respectively provided on the second side rib pipes 121 on both sides.

In the present embodiment, the first coat fixing member 11 includes first side rib pipes 111 provided on both sides, respectively, and first middle rib pipes 111 provided in the middle; a first fixed connection 112. One end of the side rib tube 111 and one end of the middle rib tube 111 are respectively connected to the same side surface of the first fixing connection tube 112, and specifically, the connection and fixation can be realized in a welding manner. The first side rib pipe 111 and the first middle rib pipe 111 are hollow.

The first inner movable member 12 includes: a second side rib pipe 121 provided at both sides and a second middle rib pipe 121 provided at the middle part, respectively; and a second fixed connection pipe 122. The first end of the second side rib pipe 121 is inserted into the first side rib pipe 111 through the other end of the first side rib pipe 111. The first end of the second middle rib pipe 121 is inserted into the first middle rib pipe 111 through the other end of the first middle rib pipe 111. The second side rib pipe 121 and the second end of the second middle rib pipe 121 are connected to the same side of the second fixing connection pipe 122, respectively. In this way, the side rib pipes 121 and the middle rib pipes 121 of the first inner sheath movable member 12 can be extended and contracted in the side rib pipes 111 on both sides of the first outer sheath fixed member 11 and the middle rib pipe 111 provided in the middle. Thereby the effect of adjusting the length of the whole support piece can be achieved.

In some embodiments, the transmission mechanism 13 connects the first outer sleeve-fixed part 11 and the first inner sleeve-movable part 12; the first inner sleeve movable part 13 is driven by the transmission mechanism 13 to extend or retract into the first outer sleeve fixed part 11 so as to adjust the length of the length-adjustable support piece.

When the length of the length-adjustable support piece needs to be adjusted, the first ratchet mechanism 132 is rotated in a first direction, the first ratchet mechanism 132 drives the force transmission shaft 131 to rotate in the first direction, and the force transmission shaft 131 drives the force transmission gear 133 to rotate in the first direction; the force transmission gear 133 drives the force transmission rack 134 to move towards the first direction, and the force transmission rack 134 drives the first inner sleeve movable part to move towards the first direction; the first direction is a direction in which the first inner sheath movable member 12 protrudes away from the first outer sheath fixed member 11.

The first ratchet mechanism 132 rotates towards the second direction, the first ratchet mechanism 132 drives the force transmission shaft 131 to rotate, and the force transmission shaft 131 drives the force transmission gears 133 respectively sleeved at two ends to rotate towards the second direction; the force transmission gear 133 drives the force transmission rack 134 to move towards the second direction, and the force transmission rack 134 drives the first inner sleeve movable part to extend in; the second direction is a direction in which the first inner sheath movable member 12 is retracted into the first outer sheath fixed member 11.

In one embodiment, the first ratchet mechanism may comprise a bidirectional ratchet, and the user may rotate the ratchet clockwise or counterclockwise by using a wrench to rotate the force transmission shaft clockwise or counterclockwise.

In one embodiment, referring to FIG. 6, the first ratchet mechanism 132 includes a non-return ratchet 1321 on either side of which are disposed a first bi-directional ratchet 1322 and a second bi-directional ratchet 1323, respectively.

Wherein, the non-return ratchet wheel 1321 is arranged on the ratchet wheel seat 136, the non-return ratchet wheel 1321 is provided with the non-return pawl 137, when in the supporting state, the non-return pawl 137 is always kept in the close contact state with the non-return ratchet wheel 1321 by the elastic force of the spring, and only when the first inner sleeve movable component 12 is recovered, the non-return pawl 137 can be separated from the non-return ratchet wheel 1321 in the artificial state. So that the first inner sheath movable member 12 can be retracted to the first outer sheath fixed member 11 described above. When the length is required to be adjusted in site construction, a worker can use a wrench to sleeve on any one of the two-way ratchet wheels, and can rotate clockwise or anticlockwise so as to drive the transmission shaft to rotate clockwise or anticlockwise, so that two-way control is realized, and the first inner sleeve movable part 12 extends out of or retracts into the first outer sleeve fixed part 11. The first bidirectional ratchet wheel and the second bidirectional ratchet wheel can also be realized by adopting a six-edge shifting wheel with the bidirectional ratchet wheel, and a common wrench is used for rotating the six-edge shifting wheel to drive the bidirectional ratchet wheel to rotate. Because the handle is used, the action of lever force is achieved, so that the strength of a field worker is saved, and the effect of pushing the movable part of the first inner sleeve to move is improved. Particularly, under the condition that the movable part of the first inner sleeve extends out, the length-adjustable support piece can be in closer contact with the adjacent support piece, so that the whole pit arm support assembly is firmer, and the supporting effect of the pit wall is improved. The stopping pawl may function to prevent the ratchet from rotating in the opposite direction so that the ratchet rotates in only a single direction.

In one embodiment, referring to fig. 7 and 8, the first fixed connection pipe 112 and the second fixed connection pipe 122 are respectively provided with a plurality of connection parts; each connecting portion is provided with a through hole for connection. Specifically, the first fixed connection pipe 112 is provided with a plurality of connection parts 1121; each connecting portion 1121 is provided with a through hole 11211 for connecting adjacent branch pieces; when in connection, the connection piece can be adopted for connection. For example, a bolt is used to pass through the through hole 11211 to achieve connection. Similarly, the second fixed connection pipe 122 is provided with a plurality of connection parts 1221; each connecting portion is provided with a through hole 12211 for connecting adjacent branch pieces.

In one embodiment, referring to fig. 9, the length-fixing support is substantially the same as the length-adjustable support described above, except that the length cannot be adjusted. There is no transmission mechanism.

Referring to fig. 9, the length fixing clip 002 includes: at least one third ribbed tube 21, two third fixed connection tubes 22. Both ends of the third ribbed tube 21 are respectively connected to the third fixed connection tube 22. The number of the third ribbed pipes 21 is 3, the third ribbed pipes are arranged in parallel, and the distances between two adjacent third ribbed pipes are equal. A plurality of support rods 23 are also included, the support rods 23 being used to connect adjacent ones of the third ribbed tubes 21. Two support rods 23 are arranged between the side rib pipe 21 and the middle rib pipe 21; between the middle rib pipe 21 and the side rib pipe 21 on the other side, 3 support rods 23 are provided.

In some embodiments, a plurality of connection parts 221 are provided on the third fixed connection pipe 22, and through holes 2211 are provided on the connection parts 221 for connecting adjacent branch pieces, or square pipes. The number of the above-described connection parts 221 may be uniformly set to 4.

In one embodiment, referring to fig. 10, 11A, 11B, 12A and 12B, the length adjustable ejector 003 comprises: a first outer sleeve fixed ram 71 and a first inner sleeve movable ram 72. The first outer sleeve fixing ejector rod 71 is of a hollow structure; the first end is provided with connecting portion, connecting portion are used for connecting piece or pillar. A first end of the first inner sleeve movable push rod 72 is inserted into the first outer sleeve fixed push rod 71 through a second end of the first outer sleeve fixed push rod 71; the insertion depth is adjustable to adjust the length of the length adjustable roof bar. The second end of the first inner sleeve movable push rod 72 is provided with a connecting portion 73, and the connecting portion 73 is used for connecting adjacent struts or support sheets. The first outer sleeve fixed ejector pin 71 and the first inner sleeve movable ejector pin 72 described above may be implemented by rigid pipes.

In some embodiments, the connecting portion 73 is provided with a through hole 731 for connecting adjacent ejector pins by using a connecting member.

In some embodiments, the length-adjustable ejector pin may further be provided with a rib 76, one end of which is connected to the connecting portion 73, and one end surface of which is fixed to the surface of the first casing fixing ejector pin 71, so as to strengthen the compression resistance of the connecting portion 73.

In one embodiment, the length-adjustable ejector pin further includes a second transmission mechanism 74, and the second transmission mechanism 74 includes: a second ratchet mechanism 741 and a force-transmitting rack 742.

Wherein the second ratchet mechanism 741 at least includes: gear 7411, gear seat 7412, ratchet shaft 7416. The gear seat 7412 is fixedly arranged on the first coat fixed ejector rod; the gear 7411 is arranged on the gear seat 7412, and the ratchet shaft 7416 is sleeved in the middle; the force-transmitting rack 742 is fixed on the movable carrier rod of the first inner sleeve and is matched with the teeth of the gear 7411. Wherein, the gear seat 7412 can be provided with a bearing, the bearing is sleeved on the ratchet shaft 7416 in an inner sleeve way, and the bearing outer sleeve is fixedly arranged in the gear seat 7412. The gear seat 7412 plays a supporting role. In this way, the ratchet shaft 7416 and the gear 7411 can be flexibly rotated. The force-transmitting rack 742 is fixed to the first inner housing movable carrier 72 and is engaged with the teeth of the gear 7411. If the first sleeve fixing post 71 is a square tube, it is also necessary to open at a position of the square tube corresponding to the first side surface on which the second transmission mechanism 74 is provided, so that the teeth of the gear 7411 can be in contact engagement with the force transmission rack 742, and the opening may be provided at a middle position of the first side surface, and the gear seat 7412 may be provided at edges of the first side surface, where the first side surface contacts two adjacent vertical surfaces, respectively. The gear seat 7412 may be fixed at the edge by welding. Gear 7411 may itself carry a non-return pawl 741111 for preventing reverse movement of gear 7411.

When the length is adjusted, a ratchet wrench is sleeved on the ratchet shaft, the ratchet wrench is rotated, the ratchet shaft rotates, the ratchet shaft drives the gear to rotate, and the gear drives the force transmission rack to move; the force transmission rack drives the movable ejector rod of the first inner sleeve to extend into or out of the fixed ejector rod of the first outer sleeve so as to adjust the length of the length-adjustable support column.

According to the method, the existing ratchet wrench is used, the ratchet wrench is provided with a bidirectional ratchet, the ratchet wrench is used for twisting the ratchet shaft to rotate, so that the force transmission rack is driven to move through the gear, the first inner sleeve movable ejector rod is driven to stretch out and draw back, the length is adjusted, and a constructor only needs to carry one ratchet wrench to adjust, so that the adjustment is simple and convenient.

The ratchet wrench structure may also be disposed directly on the first outer fixed post rod, and in one embodiment, further comprises: and a handle 7413, two handle lugs 7414 are arranged at one end of the handle 7413, the two handle lugs 7414 are arranged oppositely, a second ratchet wheel 741 is arranged in each handle lug 7414, and the second ratchet wheel 741 is a bidirectional ratchet wheel. The second ratchet 741 is nested inside the handle lug 7414; the ratchet shaft 7416 is sleeved in the middle.

When the length is adjusted, the handle 7413 is rotated, the handle drives the ratchet shaft 7416 to rotate through the bidirectional ratchet 741 in the handle lug 7414, the ratchet shaft 7416 drives the gear to rotate, and the gear drives the force transmission rack to move; the force transmission rack drives the movable ejector rod 72 of the first inner sleeve to extend into or out of the fixed ejector rod 71 of the first outer sleeve so as to adjust the length.

In one embodiment, the length of the handle 7413 is adjustable. The length of the handle 7413 is adjusted, so that the rotation can be performed more labor-saving, and the effort is saved.

In some embodiments, referring to fig. 13, a stopping mechanism is further provided, where the stopping mechanism includes the above-mentioned stopping pawl 741111, a stopping seat 7417 provided on the above-mentioned first coat fixed plunger 71, a stopping pawl shaft 7418 is provided on the stopping seat 7417, the above-mentioned stopping pawl 741111 is sleeved on the stopping pawl shaft 7418, and the stopping pawl 741111 can rotate around the stopping pawl shaft 7418 as a center, and the position is adjusted to realize stopping. As shown, the non-return pawl 741111 is adjusted to a position in contact with the force-transmitting rack 742 such that the angle between the center axis of the non-return pawl 741111 and the force-transmitting rack 742 is obtuse, thereby acting as a stop to prevent the force-transmitting rack 742 from moving in the left direction, but the force-transmitting rack 742 can move in the right direction. If stopping is not required, the check pawl 74111 can be repositioned out of contact with the force transfer rack 742. Similarly, the check pawl 741111 contacts the transfer gear 7411 to provide a stop. The stop mechanism described above may also be applied to a length adjustable support.

Referring to fig. 14A and 14B, in an embodiment, a slot 75 may be formed at one end of the above-mentioned length-adjustable ejector rod, where the slot 75 is a through slot, and the width of the slot 75 matches with the width of the rib tube of the support sheet, and may be set to be a clearance fit. Thus, when in installation, the rib pipe of the supporting piece can be embedded into the groove 75 sleeve, and the fixing effect of the length-adjustable ejector rod is achieved.

In one embodiment, the present application further provides a fixed-length ejector rod, see fig. 15A and 15B, which is not adjustable in length, compared to the adjustable-length ejector rod described above, and no transmission mechanism is provided. The length-adjustable ejector rod 004 comprises an ejector rod 1101, wherein connecting parts 1102 are respectively arranged at two ends of the ejector rod 1101, and through holes 11021 are arranged in the connecting parts 1102 and are used for connecting adjacent ejector rods or support sheets. In order to improve the stress capability of the connection part 1102, a reinforcing rib 1103 is further provided, one end of the reinforcing rib 1103 is connected to the connection part 1102, and the other end is fixed on the surface of the ejector 1101.

In some embodiments, the mandrel 1101 may be implemented using a steel tube.

Referring to fig. 16A and 16B, in an embodiment, a slot 1104 may be formed at one end of the fixed length ejector rod, the slot 1104 is a through slot, and the width of the slot 1104 matches with the width of the rib tube of the support piece, which may be set as a clearance fit. Thus, when in installation, the ejector rod is perpendicular to the supporting piece and is tightly propped against the supporting piece through the groove; the ribbed tube of the support piece can be embedded into the groove 1104 to fix the length-adjustable ejector rod.

In some embodiments, the two ejector rods can be made of 50 x 100 flat steel tubes, the ejector rods can be connected by bolts, and the length of the fixed-length ejector rod is set to be 0.5 meter, 0.7 meter or 1 meter.

The length of the first inner sleeve movable push rod 72 of the length-adjustable push rod when not extending is set to be 0.5 meter, 0.7 meter and 1 meter, and the length of the first inner sleeve movable push rod 72 after extending is set to be 0.5+0.15 meter, 0.7+0.25 meter and 1+0.3 meter. Whether the ejector rods are arranged or not and the arranging quantity of the ejector rods are determined according to the size and the length of the foundation pit. The ejector rod can be arranged when the length of the base arm is more than 3 meters.

Taking the foundation pit as an example, when the ejector rod assemblies are multiple, the ejector rod assemblies can be arranged in parallel and used for supporting two opposite sides of the foundation pit. Wherein, the distance between any two adjacent two ejector rod assemblies can be set to be 1.5-2 meters. The distance between the side ejector rod components respectively positioned at the two edges and the adjacent parallel support sheets is preferably 1.5-2 meters.

The following illustrates the steps of installation. The first step is to install a bracket, specifically, to suspend excavation when the foundation pit is excavated to 1 meter according to the designed position and the designed plane size, clean and level pit bottoms and pit arms, firmly connect two square corner tubes of one pit arm with a length-adjustable support sheet and a length-fixed support sheet at the pit bottoms by bolts, and tightly attach the pit arms, wherein the positions of the length-adjustable support sheet and the length-fixed support sheet can be placed randomly.

When the length is adjusted, the reversing handle is shifted to the extending position, the non-return pawl is pulled out, the non-return pawl is separated from contact with the non-return ratchet, and the six-edge shifting wheel on the length-adjustable support sheet is pulled by a common wrench, so that the first inner sleeve movable part 12 extends out of the first outer sleeve fixed part 11, the length is prolonged, and the square pipe is tightly propped against the pit arm. The non-return pawl is put back to enable the non-return pawl to be closely attached to the non-return ratchet wheel so as to prevent the ratchet wheel from rotating; the brackets of other pit arms are arranged by the same method, and all the support pieces are ensured to be propped against the pit arms so as to prevent the brackets from sliding downwards.

If the strut assembly is required to be installed, a length-adjustable strut is firmly connected with a plurality of length-fixed struts, then one end of the strut, which is provided with a groove, is propped against the strut rib, when the length of the length-adjustable strut is adjusted, the reversing handle can be stirred to an extending position, the non-return pawl is pulled out, the non-return pawl is separated from contact with the non-return ratchet wheel, the thumb wheel handle is pulled, the movable ejector rod of the first inner sleeve is extended, the length is prolonged, the strut is propped against the pit arm strut, the non-return pawl is put back, and the non-return pawl is closely attached with the non-return ratchet wheel, so that the ratchet wheel is prevented from rotating.

Secondly, installing other brackets, namely digging a foundation pit for 0.6 meter, and installing the brackets by adopting the method; the method is repeated circularly until the support is arranged to be 0.6-1 meter away from the designed elevation of the pit bottom, and the protective support is not arranged; then the pit bottom is excavated to the designed elevation by adopting a manual method, and the masonry is rapidly constructed to the bottom of the bracket according to the design.

Thirdly, dismantling the bracket, namely suspending the construction design masonry, dismantling the protective bracket arranged 1-2 steps above the masonry surface, and continuing the construction design masonry to the bottom of the bracket; and (3) repeating the steps circularly until the protective bracket is completely removed and the rest part of the foundation is constructed.

The support of this application comprises square angle pipe, support piece, ejector pin. The parts of the bracket are light in weight, simple in structure, easy to manufacture, easy to operate on site, high in applicability, capable of being assembled and disassembled at the pit bottom by a single person, free of special tools, capable of being customized and combined at will according to actual conditions on site, and flexible in mobility and setting length and width dimensions at will; the bracket can be self-supporting and does not fall down.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the utility model to the particular embodiments described, but is capable of modification and variation in light of the above teachings. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. The pit arm support is characterized by comprising a plurality of support pieces which are connected end to end in sequence; wherein, the support sheet comprises a length-adjustable support sheet and a length-fixed support sheet;

the pit arm support is of a polygonal structure, wherein at least one length-adjustable support piece is arranged on each side.

2. The pit arm support according to claim 1, further comprising a top rod assembly, wherein the top rod assembly is positioned in a closed area surrounded by the pit arm support, and two ends of the top rod assembly are respectively connected with two opposite sides of the pit arm support and used for supporting the pit arm support;

the ejector rod assembly comprises a plurality of ejector rods which are sequentially connected end to end.

3. The pit arm bracket of claim 2, wherein the ejector pin comprises at least one length adjustable ejector pin.

4. The pit arm bracket of claim 1, further comprising a plurality of square tubes and studs; a square corner tube is arranged between any two adjacent sides of the pit arm assembly; two side vertical surfaces of the square corner tube are respectively connected with one end of an adjacent supporting piece; and a plurality of studs are respectively arranged on two adjacent side surfaces of the square pipe and are used for being connected with adjacent support plates.

5. The pit arm bracket of claim 1, wherein the length adjustable support comprises: a first outer jacket fixing member, a first inner jacket movable member;

6. The pit arm bracket of claim 5, wherein said length adjustable support further comprises a transmission mechanism; the transmission mechanism at least comprises: the power transmission shaft is sleeved with the first ratchet mechanism at the middle part of the power transmission shaft; the force transmission gears are respectively sleeved on the force transmission shafts;

7. The corbel bracket according to claim 6, wherein the number of first ribbed tubes is 3; the distances between two adjacent first ribbed pipes are equal; the gear seat and the force transmission gear are respectively arranged on the first side rib pipes at two sides;

8. The pit arm bracket according to claim 5, wherein the first fixed connection pipe and the second fixed connection pipe are respectively provided with a plurality of connection parts; each connecting portion is provided with a through hole for connection.

9. The pit arm bracket of claim 3, wherein the length adjustable jack comprises: the first outer sleeve is used for fixing the ejector rod and the first inner sleeve is used for moving the ejector rod;

10. The pit arm bracket of claim 9, wherein the length adjustable ram further comprises a second transmission mechanism comprising: the second ratchet mechanism and the force transmission rack;

the gear seat is fixedly arranged on the first outer sleeve fixing ejector rod; the gear is arranged on the gear seat, and the ratchet shaft is sleeved in the middle of the gear seat;

when the ratchet wheel is used, the handle is rotated, and the ratchet wheel is driven to rotate by the handle; the handle drives the ratchet shaft to rotate through the bidirectional ratchet wheel in the handle lug, the ratchet shaft drives the gear to rotate, and the gear drives the force transmission rack to move; the force transmission rack drives the movable ejector rod of the first inner sleeve to extend into or out of the fixed ejector rod of the first outer sleeve so as to adjust the length of the length-adjustable ejector rod.