Bailey beam upper chord length-adjustable connecting device

Abstract

The utility model relates to a bailey beam upper chord length adjustable connecting device which comprises two clamping plate connecting units and two connecting rods, the two clamping plate connecting units are located on the two sides of an upper chord of a bailey beam respectively, inserting holes are formed in the clamping plate connecting units, one connecting rod penetrates through the inserting holes and a female head mounting hole of the bailey beam and is fixedly connected with the inserting holes, and the other connecting rod penetrates through the female head mounting hole of the bailey beam. The clamping plate connecting unit is further provided with a strip-shaped adjusting hole used for bailey beam slope adjusting, the strip-shaped adjusting hole is located in one side of the inserting hole and is flush with the inserting hole, the aperture height of the strip-shaped adjusting hole is consistent with the aperture of the inserting hole, and a slope adjusting assembly with a clamping opening is installed in the clamping plate connecting unit. The other connecting rod penetrates through the strip-shaped adjusting hole, the bayonet and the male head mounting hole of the bailey beam and is fixedly connected with the strip-shaped adjusting hole, the slope is adjusted back and forth in the length direction of the strip-shaped adjusting hole through the slope adjusting assembly, and inclined mounting of the bailey beam is achieved; according to the utility model, the problem that the upper chord member has no proper selective connection during slope adjustment of the bailey beam can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of Bailey beam support installation, and particularly relates to a connecting device with adjustable upper chord length of Bailey beam. Background Technique

[0002] The Bailey beam, also known as the Bailey truss, originated in the UK during World War II and was mainly used for quickly building temporary bridges. Nowadays, the Bailey beam has a wider range of applications and is often used in various structures such as island beams, steel trestles, and guide rails. The Bailey beam is welded by upper and lower chord bars, vertical bars, and diagonal bars. The ends of the upper and lower chord bars have male and female joints, and there are connecting pin holes on the joints. During the construction process, a pin is used to connect the male and female ends of the Bailey beam to form a whole. The connection of the Bailey beam not only satisfies the connection of straight sections. When facing a long-span cast-in-place box girder system, the Bailey beam needs to be tilted and rotated correspondingly to complete slope adjustment. There is no suitable installation connecting piece for the installation of the Bailey beam in the form of tilt and rotation. Therefore, during the actual construction process, the installation of the Bailey beam that needs slope adjustment is relatively laborious, and at the same time, the overall stability of the structure is insufficient. Moreover, for the connection between rows and groups of Bailey beams, it is impossible to selectively install according to the distance between the Bailey beams, and the use of connecting pieces is inconvenient. Currently, the connecting pieces are difficult to meet the requirements of Bailey beam erection. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art and provide a connecting device with adjustable upper chord length of Bailey beam to solve the problem of lack of suitable selective connection of the upper chord bar when the Bailey beam is adjusted in slope.

[0004] The purpose of the utility model is completed by the following technical solutions. This connecting device with adjustable upper chord length of Bailey beam includes a card plate connection unit and two connecting rods. There are two card plate connection units, which are respectively located on both sides of the upper chord bar of the Bailey beam. The card plate connection unit is provided with a penetration hole. One of the connecting rods passes through the penetration hole and the female head installation hole of the Bailey beam and is connected and fixed. The card plate connection unit is also provided with a strip-shaped adjustment hole for slope adjustment of the Bailey beam. The strip-shaped adjustment hole is located on one side of the penetration hole and is flush with it, and the aperture height of the strip-shaped adjustment hole is the same as that of the penetration hole. A slope adjustment component with a bayonet is installed in the card plate connection unit. The other connecting rod passes through the strip-shaped adjustment hole, the bayonet, and the male head installation hole of the Bailey beam and is connected and fixed, and the slope adjustment is realized by moving back and forth along the length direction of the strip-shaped adjustment hole through the slope adjustment component, and the inclined installation of the Bailey beam is achieved.

[0005] The beneficial effects of the present utility model are as follows: Compared with the prior art, by providing clamping plate connection units on both sides of the upper chord of the Bailey beam, and the clamping plate connection units are provided with insertion holes, strip-shaped adjustment holes and slope adjustment components, the connection can be adjusted according to the distance between the male and female ends of the upper chord of the Bailey beam, realizing the inclined installation of the Bailey beam. Moreover, it can be selectively connected according to the distance between the rows of Bailey beams, improving the stability between the Bailey beams and enhancing the overall construction safety.

[0006] Preferably, the clamping plate connection unit includes a support plate and outer edge plates. There are two outer edge plates which are respectively fixed on both sides of the support plate. The insertion hole and the strip-shaped adjustment hole are respectively arranged on the support plate and the outer edge plates. And an installation groove extends above the strip-shaped adjustment hole on the support plate. The slope adjustment component is located between the two outer edge plates and is installed on the strip-shaped adjustment hole and the installation groove on the support plate; Through the setting of the above structure, it is more convenient for the slope adjustment component to be assembled with the support plate and the outer edge plates.

[0007] Preferably, the slope adjustment component includes an adjustment screw rod, a stopper and an adjustment nut. The stopper is of a U-shaped structure and is located between the two outer edge plates. And the bayonet is arranged below the stopper and abuts against the bottom of the strip-shaped adjustment hole on the support plate. Above the stopper is located on the installation groove and is provided with a threaded hole. The threaded hole is arranged along the length direction of the stopper. The threaded section of the adjustment screw rod is screwed with the threaded hole of the stopper. And a gear assembly is arranged between one end of the adjustment screw rod and the adjustment nut. The adjustment nut is installed on one end of the support plate, and the adjustment end of the adjustment nut is located outside the support plate; Through the setting of the above structure, during the clockwise and counterclockwise rotation of the adjustment nut, the adjustment screw rod is driven to rotate through the gear assembly, so that the stopper can move back and forth along the length direction of the strip-shaped adjustment hole to adjust the distance between the male and female ends of the upper chord of the Bailey beam.

[0008] Preferably, sliding strips are arranged on both sides in the width direction of the stopper, and sliding grooves are arranged on the inner sides of the two outer edge plates. The sliding strips are embedded in the sliding grooves so that the stopper can slide back and forth along the length direction of the clamping plate connection unit; This makes the stopper more stable during the movement and not easily deflected.

[0009] Preferably, both ends of the adjusting screw rod are inserted into the placing holes provided on the support plate, and a limiting block is provided at one end of the adjusting screw rod and is limited on the limiting groove provided on the support plate. A first gear is provided at the other end of the adjusting screw rod, and the first gear is located in the gear groove provided on the support plate. With such a structural arrangement, the adjusting screw rod can be well limited on the placing holes and the limiting groove on the installation groove, and has better stability during rotation. Moreover, since the first gear is located in the gear groove, its stability during operation is even better.

[0010] Preferably, a second gear is provided at one end of the adjusting nut. The second gear is located in the gear groove provided on the support plate, and the second gear meshes with the first gear. With such a structural arrangement, the adjusting nut can be well limited in the gear groove on the installation groove, and has better stability during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional structural schematic diagram of the adjustable connection device for the upper chord length of the Bailey beam of the present invention.

[0012] Figure 2 is a three-dimensional structural schematic diagram of the clamping plate connection unit of the present invention.

[0013] Figure 3 is a three-dimensional structural schematic diagram of the adjusting screw rod of the present invention.

[0014] Figure 4 is a three-dimensional structural schematic diagram of the limiter of the present invention.

[0015] Figure 5 is a three-dimensional structural schematic diagram of the adjusting nut of the present invention.

[0016] Figure 6 is a three-dimensional structural schematic diagram of the outer edge plate of the present invention.

[0017] Figure 7 is a three-dimensional structural schematic diagram of the support plate of the present invention.

[0018] Figure 8 is a schematic diagram of the actual application structure of the adjustable connection device for the upper chord length of the Bailey beam of the present invention Figure One 。

[0019] Figure 9 is a schematic diagram of the actual application structure of the adjustable connection device for the upper chord length of the Bailey beam of the present invention Figure Two 。

[0020] The reference numerals in the drawings are respectively: 1, connecting rod; 2, clamping plate connection unit; 3, Bailey beam; 4, slope adjustment component; 5, bolt; 21, insertion hole; 22, strip-shaped adjustment hole; 23, support plate; 24, outer edge plate; 25, installation groove; 26, sliding groove; 27, placing hole; 28, limiting groove; 29, gear groove; 31, upper chord; 32, female head installation hole; 33, male head installation hole; 34, lower chord; 41, bayonet; 42, adjusting threaded rod; 43, limiter; 44, adjusting nut; 45, sliding strip; 46, limiting block; 47, first gear; 48, second gear. Detailed implementation manners

[0021] The following will introduce the present utility model in detail with reference to the drawings: As shown in the Figures 1 to 9 drawings, the present utility model includes a clamping plate connection unit 2 and two connecting rods 1. There are two clamping plate connection units 2 which are respectively located on both sides of the upper chord 31 of the Bailey beam 3. The clamping plate connection unit 2 is provided with an insertion hole 21. One of the connecting rods 1 passes through the insertion hole 21 and the female head installation hole 32 of the Bailey beam 3 and is fixedly connected; the clamping plate connection unit 2 is further provided with a strip-shaped adjustment hole 22 for slope adjustment of the Bailey beam 3. The strip-shaped adjustment hole 22 is located on one side of the insertion hole 21 and is flush with it, and the aperture height of the strip-shaped adjustment hole 22 is the same as that of the insertion hole 21. A slope adjustment component 4 with a bayonet 41 is installed in the clamping plate connection unit 2. The other connecting rod 1 passes through the strip-shaped adjustment hole 22, the bayonet 41 and the male head installation hole 33 of the Bailey beam 3 and is fixedly connected, and the slope of the Bailey beam 3 is adjusted back and forth along the length direction of the strip-shaped adjustment hole 22 through the slope adjustment component 4 to realize the inclined installation of the Bailey beam 3. The inner diameters of the bayonet 41 and the insertion hole 21 are equal, and the inner diameter is slightly larger than the outer diameter of the connecting rod 1. The left and right ends of the strip-shaped adjustment hole 22 are arc-shaped. The connecting rod 1 is similar in shape to a Bailey pin, slightly longer than an ordinary Bailey pin, thicker at one end and with a small opening at one end for inserting a bolt 5 for fixation.

[0022] The clamping plate connection unit 2 includes a support plate 23 and an outer edge plate 24. There are two outer edge plates 24 which are respectively fixed on both sides of the support plate 23. The insertion hole 21 and the strip-shaped adjustment hole 22 are respectively arranged on the support plate 23 and the outer edge plate 24. An installation groove 25 is extended and provided above the strip-shaped adjustment hole 22 on the support plate 23. The slope adjustment component 4 is located between the two outer edge plates 24 and is installed on the strip-shaped adjustment hole 22 and the installation groove 25 on the support plate 23. The outer edge plate 24 is made of a square steel sheet of steel, mainly protecting the internal structure, with scales on the outer edge to measure the horizontal displacement distance of the Bailey beam at this time, and at the same time increasing the beauty; the support plate 23 is a square support structure made of steel.

[0023] The slope adjusting assembly 4 includes an adjusting screw rod 42, a stopper 43 and an adjusting nut 44. The stopper 43 is in a U-shaped structure and is located between two outer edge plates 24. The bayonet 41 is arranged below the stopper 43 and abuts against the bottom of the strip-shaped adjusting hole 22 on the support plate 23. Above the stopper 43 is located on the installation groove 25 and is provided with a threaded hole, and the threaded hole is arranged along the length direction of the stopper 43. The threaded section of the adjusting screw rod 42 is screwed with the threaded hole of the stopper 43, and a gear assembly is arranged between one end of the adjusting screw rod 42 and the adjusting nut 44. The adjusting nut 44 is installed on one end of the support plate 23, and the adjusting end of the adjusting nut 44 is located outside the support plate 23.

[0024] Sliding strips 45 are arranged on both sides in the width direction of the stopper 43, and sliding grooves 26 are arranged on the inner sides of the two outer edge plates 24. The sliding strips 45 are embedded in the sliding grooves 26 so that the stopper 43 can slide back and forth along the length direction of the card plate connection unit 2.

[0025] Both ends of the adjusting screw rod 42 are inserted into the placing holes 27 provided on the support plate 23, and a limiting block 46 is arranged at one end of the adjusting screw rod 42 and is limited on the limiting groove 28 provided on the support plate 23. A first gear 47 is arranged at the other end of the adjusting screw rod 42, and the first gear 47 is located in the gear groove 29 provided on the support plate 23.

[0026] A second gear 48 is arranged at one end of the adjusting nut 44, the second gear 48 is located in the gear groove 29 provided on the support plate 23, and the second gear 48 meshes with the first gear 47.

[0027] The installation principle of the present utility model is as follows: First, when longitudinally connecting the Bailey beams 3 that need to adjust the slope, the male and female ends of the lower chord rods 34 of the two Bailey beams 3 on both sides are connected together by using traditional pins. For the male and female ends of the upper chord rods 31 that cannot be connected, the horizontal displacement distance of the Bailey beams is preferably measured first; then, by turning the adjusting nut 44 in advance outside the site, the purpose is to drive the adjusting screw rod 42 to rotate so as to move the stopper 43. By observing the scale, when the horizontal distance is the same as the required horizontal displacement distance, stop turning the adjusting nut 44; finally, one end of the adjusted connecting buckle is connected and fixed by passing the connecting rod 1 through the connecting buckle and the female end surface of the Bailey beam 3; the male end of the Bailey beam 3 passes the connecting rod 1 through the stopper 43 in the middle of the connecting buckle and the male part for connection and fixation. At this time, the variable cross-section slope adjustment of the Bailey beam is completed.

[0028] The utility model uses the lower chord bolt as the rotating shaft and the rotating Bailey truss as the slope adjusting structure, replacing the single independent rod slope adjusting form of the full hall support in the combined support. The linear control of the cast-in-place box girder is better. The Bailey beam is directly used as the support structure of the box girder bottom formwork system, and the upper chord inclined Bailey beam is used as the variable cross-section slope adjusting structure to adjust the linearity. The support is more stable and the angle adjustment is more accurate; it can be well connected and fixed according to the distance between the male and female ends of the Bailey beam to realize the slope adjustment of the Bailey beam, which is time-saving and labor-saving in use.

[0029] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An adjustable connection device for the upper chord length of a Bailey beam, comprising a clamping plate connection unit (2) and two connecting rods (1), characterized in that: Two card connection units (2) are provided and are respectively located on both sides of the upper chord (31) of the Bailey beam (3). The card connection unit (2) is provided with an insertion hole (21). One of the connecting rods (1) passes through the insertion hole (21) and the female installation hole (32) of the Bailey beam (3) and is fixedly connected. The card connection unit (2) is further provided with a strip-shaped adjustment hole (22) for slope adjustment of the Bailey beam (3). The strip-shaped adjustment hole (22) is located on one side of the insertion hole (21) and is flush. The aperture height of the strip-shaped adjustment hole (22) is the same as the aperture of the insertion hole (21). A slope adjustment component (4) with a bayonet (41) is installed in the card connection unit (2). The other connecting rod (1) passes through the strip-shaped adjustment hole (22), the bayonet (41) and the male installation hole (33) of the Bailey beam (3) and is fixedly connected, and the slope of the Bailey beam (3) is adjusted back and forth along the length direction of the strip-shaped adjustment hole (22) through the slope adjustment component (4) to realize the inclined installation of the Bailey beam (3).

2. The adjustable connection device for the upper chord length of the Bailey beam according to claim 1, wherein: The card connection unit (2) includes a support plate (23) and outer edge plates (24). Two outer edge plates (24) are provided and are respectively fixed on both sides of the support plate (23). The insertion hole (21) and the strip-shaped adjustment hole (22) are respectively arranged on the support plate (23) and the outer edge plates (24). An installation groove (25) is extended above the strip-shaped adjustment hole (22) on the support plate (23). The slope adjustment component (4) is located between the two outer edge plates (24) and is installed on the strip-shaped adjustment hole (22) and the installation groove (25) on the support plate (23).

3. The adjustable connection device for the upper chord length of the Bailey beam according to claim 2, characterized in that: The slope adjustment component (4) includes an adjustment screw rod (42), a stopper (43) and an adjustment nut (44). The stopper (43) is of a U-shaped structure and is located between the two outer edge plates (24). The bayonet (41) is arranged below the stopper (43) and abuts against the bottom of the strip-shaped adjustment hole (22) on the support plate (23). A threaded hole is provided above the stopper (43) on the installation groove (25). The threaded hole is arranged along the length direction of the stopper (43). The threaded section of the adjustment screw rod (42) is screwed with the threaded hole of the stopper (43). A gear assembly is provided between one end of the adjustment screw rod (42) and the adjustment nut (44). The adjustment nut (44) is installed on one end of the support plate (23), and the adjustment end of the adjustment nut (44) is located outside the support plate (23).

4. The adjustable connection device for the upper chord length of the Bailey beam according to claim 3, characterized in that: Sliding strips (45) are provided on both sides in the width direction of the stopper (43). Sliding grooves (26) are provided on the inner sides of the two outer edge plates (24). The sliding strips (45) are embedded in the sliding grooves (26) so that the stopper (43) can slide back and forth along the length direction of the card connection unit (2).

5. The adjustable connection device for the upper chord length of the Bailey beam according to claim 3, characterized in that: Both ends of the adjusting screw rod (42) are inserted into the placing holes (27) provided on the support plate (23), and a limiting block (46) is provided at one end of the adjusting screw rod (42) and is limited on the limiting groove (28) provided on the support plate (23). A first gear (47) is provided at the other end of the adjusting screw rod (42), and the first gear (47) is located in the gear groove (29) provided on the support plate (23).

6. The adjustable connection device for the upper chord length of the Bailey beam according to claim 5, characterized in that: A second gear (48) is provided at one end of the adjusting nut (44). The second gear (48) is located in the gear groove (29) provided on the support plate (23), and the second gear (48) meshes with the first gear (47).

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