Low-reinforced concrete guardrail mold

Abstract

The low-strength concrete guardrail mold comprises a shell, a feeding port is formed in the top of the shell, the bottom of the shell is of an open structure, the shell is provided with a first side wall and a second side wall which are opposite, the first side wall is also of an open structure, and a connecting hole allowing a steel strand to penetrate through is formed in the second side wall; a vibrating unit is movably arranged on the steel strand, and a driving mechanism used for driving the vibrating unit to move is further arranged on the second side wall. The vibrating unit is arranged on the steel strand, the driving mechanism is arranged on the shell, and the vibrating unit is driven by the driving mechanism to move, so that concrete can be shaken off from the steel strand. Compared with the prior art, through cooperation of the driving mechanism and the vibrating unit, the situation that concrete which is not vibrated remains on the steel strand is not prone to occurring, and connection between the wall and the steel strand is tight.

Description

Technical Field

[0001] The invention relates to the technical field of highway construction, in particular to a low-reinforced concrete guardrail mould. Background Art

[0002] Traffic accidents in which large vehicles collide with the central median guardrail and cross into the opposite lane will cause great social impact and losses. In order to further improve the ability to ensure safe operation of highways, more and more highways are equipped with concrete guardrails in the central median.

[0003] At present, a Chinese patent with announcement number CN219364437U discloses a low-reinforced concrete guardrail in a central median, including a concrete guardrail wall, in which a through steel strand is arranged axially. When the above-mentioned low-reinforced concrete guardrail is cast by a slipform machine, the concrete will first fall on the top of the steel strand when it enters the mold. Although the vibrating rod at the mold feed port can theoretically shake the concrete off the steel strand and achieve uniform vibration of the concrete in the mold as a whole, the vibrating rod cannot directly act on the vibration force of the steel strand, resulting in unvibrated concrete remaining on the steel strand, and ultimately the wall and the steel strand are not tightly connected. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a low-reinforced concrete guardrail mold.

[0005] The objective of the present invention is achieved through the following technical solutions: A low-reinforced concrete guardrail mold comprises a shell, a feed port is arranged on the top of the shell, the bottom of the shell is an open structure, the shell has a first side wall and a second side wall opposite to each other, the first side wall is also constructed as an open structure, a connecting hole for a steel strand to pass through is opened on the second side wall, a vibrating unit is movably arranged on the steel strand, and a driving mechanism for driving the vibrating unit to move is also arranged on the second side wall.

[0006] Preferably, the vibrating unit comprises a connecting sleeve sleeved on the steel strand, an elastic member is connected between the connecting sleeve and the steel strand, and the driving mechanism can strike the connecting sleeve.

[0007] Preferably, the driving mechanism comprises a rotatably arranged cam, and the distal end of the cam can strike the connecting sleeve.

[0008] Preferably, an elastic sleeve is provided in the connecting hole, and the steel strand is passed through the elastic sleeve.

[0009] Preferably, a driving shaft is rotatably arranged in the feed port, blades are arranged on the side walls of the driving shaft, a transmission mechanism is connected between the driving shaft and the cam, and the blades are adapted to drive the driving shaft to rotate under the impact of concrete.

[0010] Preferably, the transmission mechanism includes a first gear arranged on the driving shaft and a second gear arranged on the rotating shaft of the cam, and a transmission belt is connected between the first gear and the second gear.

[0011] Preferably, the driving mechanism is arranged on the outer side surface of the second side wall.

[0012] Preferably, the vibrating unit comprises a supporting sleeve sleeved on the steel strand, the supporting sleeve is rotatably connected to the steel strand, an eccentric block is provided on the inner wall of the supporting sleeve, and the driving mechanism can drive the supporting sleeve to rotate.

[0013] Preferably, the driving mechanism comprises a rotatably arranged driving sleeve, the supporting sleeve passes through the driving sleeve, and a key structure is adapted between the supporting sleeve and the driving sleeve.

[0014] Preferably, the support sleeve is spliced ​​with several parts in sequence along the axial direction, and the support sleeve has a first end and a second end relative to each other. A connecting pin is slidably provided on the side wall of the first end, and a coupling hole is correspondingly opened on the side wall of the second end. A driving pin is elastically provided on the side wall of the support sleeve; when the driving sleeve abuts against the driving pin, the driving pin is pressed down and pushes the connecting pin into the coupling hole of the subsequent connecting sleeve; an unlocking rod is also slidably provided in the support sleeve, and when the driving pin is pressed down, it can also push the unlocking rod to push the connecting pin of the previous connecting sleeve out of the coupling hole.

[0015] The beneficial effects of the present invention are: 1. By arranging a vibrating unit on the steel strand and arranging a driving mechanism on the housing, and driving the vibrating unit to move via the driving mechanism, the concrete can be shaken off the steel strand. Compared with the prior art, the present invention is less likely to have unvibrated concrete remaining on the steel strand through the cooperation of the driving mechanism and the vibrating unit, and the connection between the wall and the steel strand is tighter.

[0016] 2. The vibrating unit is a resilient connecting sleeve, which can be knocked by the driving mechanism to achieve reciprocating vibration of the connecting sleeve, thereby vibrating the concrete inside the shell to achieve a better guardrail casting effect.

[0017] 3. The vibrating unit is a rotatable supporting sleeve, and an eccentric block is arranged inside the supporting sleeve. The supporting sleeve can be driven to rotate by a driving mechanism. Under the action of centrifugal force, the supporting sleeve can vibrate the concrete inside the shell to achieve a better guardrail casting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the connecting sleeve; Figure 2 for Figure 1 A magnified view of part A; Figure 3 is a schematic diagram of the structure of the support sleeve; Figure 4 for Figure 3 A magnified view of part B; Figure 5 Schematic diagram of the structure of the connecting pin (the driving sleeve is schematically shown in a dotted frame, and the moving direction of the driving sleeve is indicated by an arrow).

[0019] Figure numerals: 1. shell; 2. feed port; 3. first side wall; 4. second side wall; 5. connecting hole; 6. vibrating unit; 7. driving mechanism; 8. connecting sleeve; 9. elastic member; 10. cam; 11. elastic sleeve; 12. driving shaft; 13. blade; 14. transmission mechanism; 15. first gear; 16. second gear; 17. transmission belt; 18. supporting sleeve; 19. eccentric block; 20. driving sleeve; 21. first end; 22. second end; 23. connecting pin; 24. engaging hole; 25. driving pin; 26. unlocking rod; 27. fixing plate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] A low-reinforced concrete guardrail mold includes a shell 1. The specific structure of the shell 1 can refer to the common guardrail mold configuration of the slipform machine in the prior art. For example, the top of the shell 1 can be provided with a feed port 2, and the bottom and one of the side walls of the shell 1 are both configured as open structures. The slipform machine can attach the shell 1 to it through a connecting mechanism such as a connecting arm, and then use a bucket or other feeding mechanism to put concrete into the feed port 2. As the slipform machine moves, the mold can form the required concrete guardrail on the casting surface.

[0022] For the convenience of explanation, the two opposite side walls of the shell 1 are defined as the first side wall 3 and the second side wall 4, respectively, wherein the first side wall 3 is an open structure, so that the concrete can be molded into the desired configuration. In order to realize the slipform casting of the low-reinforced concrete guardrail, a connecting hole 5 for the steel strand to pass through is opened on the second side wall 4. For example, a fixing plate 27 is provided on the casting surface, one end of the steel strand is fixed to the fixing plate 27, and the other end passes through the connecting hole 5 and is fixed to the fixing plate 27 or other fixing mechanism on the other side. After the casting is completed, the steel strand inside the guardrail meets sufficient strength, while reducing the amount of steel bars.

[0023] In addition, a vibrating unit 6 is movably provided on the steel strand, and a driving mechanism 7 for driving the vibrating unit 6 is also provided on the second side wall 4. When concrete enters the housing 1, the concrete will fall on the steel strand, and the driving mechanism 7 drives the vibrating unit 6 to move, so that the concrete will fall off the steel strand, and it is not easy for unvibrated concrete to remain on the steel strand.

[0024] In some embodiments, the vibrating unit 6 may include a connecting sleeve 8 sleeved on the steel strand, and an elastic member 9 is connected between the connecting sleeve 8 and the steel strand, for example, the elastic member 9 may include a plurality of springs distributed along the circumferential direction. When the spring is in a natural state, the connecting sleeve 8 is coaxial with the steel strand, so a plurality of connecting sleeves 8 are spliced ​​on the steel strand to form an axis. The driving mechanism 7 is adapted to be able to knock the connecting sleeve 8 entering the housing 1, and then the connecting sleeve 8 will reciprocate to achieve the vibration of the concrete in the housing 1.

[0025] It should be understood that in the traditional slipform casting process, usually only a vibrating device can be provided at the feed port 2 to achieve vibration, but the vibration force is difficult to act on the steel strands on the one hand, and on the other hand, it is difficult to act on the concrete in the shell 1, which ultimately leads to the looseness of the concrete and even the low structural strength of the guardrail. In the present invention, through the cooperation of the driving mechanism 7 and the vibrating unit 6, the concrete in the shell 1 is vibrated by the steel strands, thereby solving the above technical problems and improving the strength of the cast low-reinforced guardrail.

[0026] In a specific example, the driving mechanism 7 includes a rotatable cam 10, and in particular, the cam 10 can be arranged on the outer side of the second side wall 4, so as not to be in direct contact with concrete. When the cam 10 rotates, the distal end of the cam 10 will hit the connecting sleeve 8, thereby achieving vibration of the connecting sleeve 8. The rotation of the cam 10 can be achieved by a driving source such as a motor.

[0027] For example, an elastic sleeve 11 may be provided in the connection hole 5, and the steel strand is adapted to pass through the housing 1 through the elastic sleeve 11. Therefore, when the connection sleeve 8 vibrates, the elastic sleeve 11 may be deformed accordingly, and concrete is unlikely to leak out of the connection hole 5. It should be noted that concrete has low fluidity, and even if the elastic sleeve 11 is not provided in the connection hole 5, that is, there is a gap between the steel strand and the connection hole 5, it will not affect the normal forming of the guardrail.

[0028] In a more preferred example, a driving shaft 12 is rotatably disposed in the feed port 2, and a blade 13 is disposed on the side wall of the driving shaft 12. The blade 13 can drive the driving shaft 12 to rotate after being impacted from top to bottom by concrete. A transmission mechanism 14 is connected between the driving shaft 12 and the cam 10, and the rotational force of the driving shaft 12 can be transmitted to the cam 10 through the transmission mechanism 14, thereby achieving the knocking of the connecting sleeve 8.

[0029] The transmission mechanism 14 may preferably include a first gear 15 disposed on the driving shaft 12, a second gear 16 disposed on the rotating shaft of the cam 10, and a transmission belt 17 is further connected between the first gear 15 and the second gear 16. For example, the gear ratio of the first gear 15 and the second gear 16 may be optimized to obtain the expected rotation speed of the cam 10 and the expected vibration force of the connecting sleeve 8.

[0030] In the process of striking the connecting sleeve 8, the steel strand will inevitably vibrate to a certain extent. Although the vibration is not fatal to the already formed guardrail, it will affect the forming quality of the guardrail to a certain extent.

[0031] Based on this, the present invention also provides another embodiment of the vibrating unit 6, as follows: The vibrating unit 6 includes a support sleeve 18 sleeved on the steel strand, and the support sleeve 18 is rotatably connected to the steel strand. In addition, an eccentric block 19 is provided on the inner wall of the support sleeve 18, and the driving mechanism 7 is adapted to drive the support sleeve 18 to rotate. When the support sleeve 18 rotates, under the action of centrifugal force, the support sleeve 18 can vibrate the concrete inside the housing 1 to achieve a better guardrail casting effect.

[0032] For example, the driving mechanism 7 includes a driving sleeve 20 rotatably arranged on the outer side surface of the second side wall 4, and the steel strand and the support sleeve 18 pass through the driving sleeve 20, and a key structure is adapted between the support sleeve 18 and the driving sleeve 20. The key structure is well known in the mechanical field, so it is not described in detail. In short, a key can be set on the support sleeve 18, and a key slot is correspondingly set on the driving sleeve 20. When the driving sleeve 20 rotates, the support sleeve 18 can be driven to rotate through the key structure.

[0033] In some examples, the drive sleeve 20 can be rotated by a drive source such as a motor, especially the drive sleeve 20 located in the shell 1, so that the drive sleeve 20 located in the formed guardrail is not easy to move, thereby ensuring the molding quality of the guardrail.

[0034] In other examples, the rotational power of the driving sleeve 20 may come from the driving shaft 12 and the transmission mechanism 14 described above. The transmission principle is the same and will not be described in detail.

[0035] For the convenience of description, the two opposite ends of the support sleeve 18 are defined as the first end 21 and the second end 22. The first end 21 is the rear end along the direction of travel of the slipform machine, and the second end 22 is the front end along the direction of travel of the slipform machine. The term "front end" can be understood as the end that the drive sleeve 20 arrives at first, and the "rear end" is the end that the drive sleeve 20 arrives at after passing the front end.

[0036] A connecting pin 23 is slidably provided on the side wall of the first end 21, and a coupling hole 24 is correspondingly provided on the side wall of the second end 22. The connecting pins 23 of adjacent support sleeves 18 are aligned with the coupling holes 24. In addition, a driving pin 25 is elastically provided on the side wall at the first end 21 of the support sleeve 18. For example, the driving pin 25 can be elastically provided by being connected to the spring of the support sleeve 18. In addition, an unlocking rod 26 is slidably provided in the support sleeve 18. The specific casting process of the present invention will be described below, and for the convenience of description, the support sleeves 18 passed by the mold are defined as support sleeve one, support sleeve two, and support sleeve three in sequence.

[0037] S1. As the slipform machine moves forward, the mold of the present invention slides from the front end of the support sleeve 1 to the rear end thereof, during which the driving sleeve 20 drives the support sleeve 1 to rotate through the key structure to achieve vibration of the concrete in the shell 1; S2, when the shell 1 slides to the rear end of the support sleeve 1, the driving sleeve 20 will abut against the driving pin 25 of the support sleeve 1. At this time, the driving pin 25 presses down and pushes the connecting pin 23 into the engagement hole 24 of the next support sleeve 18 (i.e., the support sleeve 2). Therefore, when the driving sleeve 20 drives the support sleeve 2 to rotate, the support sleeve 1 can still keep rotating, thereby ensuring sufficient vibration of the concrete in the shell 1. During this period, the shell 1 slides from the front end of the support sleeve 2 to its rear end; S3. When the shell 1 slides to the rear end of the support sleeve 2, the drive sleeve 20 will abut against the drive pin 25 of the support sleeve 2. At this time, the drive pin 25 presses down and pushes the corresponding connecting pin 23 into the engagement hole 24 of the rear support sleeve 18 (i.e., support sleeve three). At the same time, the drive pin 25 will also push the unlocking rod 26 to further insert into the engagement hole 24 of the support sleeve 2, thereby pushing the connecting pin 23 of the previous connecting sleeve 8 (i.e., support sleeve two) out of the engagement hole 24, so that the support sleeves two and three can rotate synchronously, while the support sleeves two and one are disconnected, that is, the support sleeve one will not rotate, and it is not easy to cause damage to the formed guardrail.

[0038] Although only the movement states of the three support sleeves 18 are described above, it can be understood that the support sleeves 18 of the present invention will be combined in pairs in sequence to achieve sufficient vibration of the concrete in the shell 1, and automatically achieve the disengagement of the previous support sleeve 18 and the engagement with the next support sleeve 18, so that the system control complexity of the present invention is reduced.

[0039] For example, both sides of the bottom of the driving pin 25 are configured with inclined surfaces, and the ends of the unlocking rod 26 and the connecting pin 23 are configured with matching inclined surfaces. When the driving pin 25 is pressed down, the unlocking rod 26 and the connecting rod can be pushed to slide accordingly by the guidance of the inclined surfaces.

[0040] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A low-reinforced concrete guardrail mold, characterized by: The invention comprises a shell (1), wherein a feed port (2) is arranged at the top of the shell (1), and the bottom of the shell (1) is an open structure. The shell (1) has a first side wall (3) and a second side wall (4) opposite to each other, and the first side wall (3) is also constructed as an open structure. The second side wall (4) is provided with a connecting hole (5) for a steel strand to pass through, and a vibrating unit (6) is movably arranged on the steel strand. The second side wall (4) is also provided with a driving mechanism (7) for driving the vibrating unit (6) to move.

2. The low-reinforced concrete guardrail mold according to claim 1 is characterized in that: The vibrating unit (6) comprises a connecting sleeve (8) sleeved on the steel strand, an elastic member (9) is connected between the connecting sleeve (8) and the steel strand, and the driving mechanism (7) is capable of striking the connecting sleeve (8).

3. The low-reinforced concrete guardrail mold according to claim 2 is characterized in that: The driving mechanism (7) comprises a rotatably arranged cam (10), and the distal end of the cam (10) is capable of striking the connecting sleeve (8).

4. The low-reinforced concrete guardrail mold according to claim 2 is characterized in that: An elastic sleeve (11) is arranged in the connection hole (5), and the steel strand is passed through the elastic sleeve (11).

5. The low-reinforced concrete guardrail mold according to claim 3 is characterized by: A drive shaft (12) is rotatably arranged in the feed port (2), a blade (13) is arranged on the side wall of the drive shaft (12), a transmission mechanism (14) is connected between the drive shaft (12) and the cam (10), and the blade (13) is adapted to be able to drive the drive shaft (12) to rotate under the impact of concrete.

6. The low-reinforced concrete guardrail mold according to claim 5 is characterized by: The transmission mechanism (14) comprises a first gear (15) arranged on the driving shaft (12) and a second gear (16) arranged on the rotating shaft of the cam (10); a transmission belt (17) is connected between the first gear (15) and the second gear (16).

7. The low-reinforced concrete guardrail mold according to any one of claims 1 to 6, characterized in that: The driving mechanism (7) is arranged on the outer side surface of the second side wall (4).

8. The low-reinforced concrete guardrail mold according to claim 1 is characterized by: The vibrating unit (6) comprises a support sleeve (18) sleeved on the steel strand, the support sleeve (18) being rotatably connected to the steel strand, an eccentric block (19) being arranged on the inner wall of the support sleeve (18), and the driving mechanism (7) being capable of driving the support sleeve (18) to rotate.

9. The low-reinforced concrete guardrail mold according to claim 8 is characterized by: The driving mechanism (7) comprises a rotatably arranged driving sleeve (20), the supporting sleeve (18) passes through the driving sleeve (20), and a key structure is adapted between the supporting sleeve (18) and the driving sleeve (20).

10. The low-reinforced concrete guardrail mold according to claim 9 is characterized in that: The support sleeve (18) is spliced ​​with a plurality of them in sequence along the axial direction, and the support sleeve (18) has a first end (21) and a second end (22) opposite to each other, a connecting pin (23) is slidably arranged on the side wall of the first end (21), a corresponding engaging hole (24) is opened on the side wall of the second end (22), and a driving pin (25) is elastically arranged on the side wall of the support sleeve (18); When the driving sleeve (20) abuts against the driving pin (25), the driving pin (25) presses down and pushes the connecting pin (23) into the engaging hole (24) of the next connecting sleeve (8); An unlocking rod (26) is also slidably arranged inside the support sleeve (18), and when the driving pin (25) is pressed down, the unlocking rod (26) can be pushed to push the connecting pin (23) of the previous connecting sleeve (8) out of the engaging hole (24).

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