Tensioning jack for high-speed railway track prefabricated slab production experiment

Abstract

The tensioning jack for the high-speed railway track prefabricated slab production experiment comprises a cylinder barrel and a handle seat which are connected together, a piston is fixedly arranged in the cylinder barrel, a sealing sleeve is arranged at the end of the inner side of the piston, and a piston rod is arranged outside the piston and the sealing sleeve in a sleeved mode. A sleeve is arranged at the end of the piston rod through a screw, a mandrel is arranged at the end of the sleeve, a steel bar mounting end is arranged at the end of the mandrel, and a steel bar fixing end used for fixing a steel bar is arranged at the tail of the piston. A first oil inlet communicated with the piston rod and a second oil inlet communicated with the piston are formed in the handle seat; the handle seat is provided with a scale placing groove, and the sleeve is provided with a scale extending into the scale placing groove. The prefabricated slab tensioning device is compact in structure, convenient to carry to a construction site for operation, and capable of providing accurate and stable tensioning force to ensure that the prestress of a prefabricated slab meets the design requirement, so that the safety and the stability of a high-speed railway line are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed railway prefabricated plate production, and more specifically to a tensioning jack for high-speed railway track prefabricated plate production experiment. Background Art

[0002] During the production and installation of high-speed railway prefabricated panels, in order to enhance the reliability and tightness of their connections, it is necessary to increase prestress for the tensioning steel bars used in the prefabricated panels. Prestress is very important for ensuring the stability and safety of the prefabricated panels during use.

[0003] Currently, bolt pre-tightening is mostly used when prestressing precast panels. Bolts are used to connect the precast panels and the supporting structure, and the tensioning force is applied by tightening the bolts. Although this method is simple and easy to operate, it requires manual rotation of the bolts, which not only has high labor intensity for employees, but also makes it difficult to ensure the accuracy of applying the tensioning force. It is not suitable for applying prestress to large precast panels such as high-speed railway precast panels. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a tensioning jack for high-speed railway track prefabricated plate production experiment, which reduces the labor intensity of employees and improves the accuracy of applying tensioning force.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0006] A tensioning jack for experimental production of prefabricated track panels for high-speed railways comprises a cylinder and a handle seat connected together, a piston is fixedly arranged in the cylinder, a sealing sleeve is arranged at the inner end of the piston, and a piston rod which can move forward and backward along the piston and the sealing sleeve is sleeved on the outside of the piston and the sealing sleeve; a sleeve is arranged at the end of the piston rod through a screw, a core shaft for passing a steel rod is arranged at the end of the sleeve, a steel rod mounting end is arranged at the end of the core shaft, and a steel rod fixing end for fixing the steel rod is arranged at the tail of the piston; a first oil inlet connected to the piston rod and a second oil inlet connected to the piston are arranged on the handle seat; a ruler placement groove facing the movement direction of the piston rod is opened on the handle seat, and a ruler extending into the ruler placement groove for indicating the movement distance of the piston rod is arranged on the sleeve.

[0007] To further optimize the technical solution, the core shaft is arranged on the sleeve through a fixing plate, and the fixing plate and the sleeve are fixed by bolts.

[0008] To further optimize the technical solution, a ruler bracket is provided at the side end of the sleeve, and the ruler is set on the ruler bracket through a handle screw.

[0009] To further optimize the technical solution, gaskets for improving sealing performance are provided between the sealing sleeve and the piston and between the sealing sleeve and the piston rod.

[0010] To further optimize the technical solution, guide rings are provided on both inner and outer sides of the tail of the piston rod to facilitate the movement of the piston rod.

[0011] To further optimize the technical solution, gaskets are provided on both the inner and outer sides of the tail of the piston rod to improve the sealing performance between the piston rod, the piston and the cylinder.

[0012] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0013] The utility model provides a tensioning jack for high-speed railway track prefabricated plate production experiment, which has a compact structure and is easy to carry to the construction site for operation. At the same time, it can provide accurate and stable tensioning force to ensure that the prestress of the prefabricated plate meets the design requirements, thereby ensuring the safety and stability of the high-speed railway line. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Among them: 1. Cylinder, 2. Handle seat, 3. Piston, 4. Piston rod, 5. Mandrel, 6. Steel rod mounting end, 7. Steel rod fixed end, 8. Fixed plate, 9. Sealing sleeve, 10. Sleeve, 11. Screw, 12. Scale bracket, 13. Handle screw, 14. Scale, 15. First oil inlet, 16. Second oil inlet, 17. Guide ring, 18. Washer. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Tension jacks for high-speed railway track prefabricated slab production experiments, combined with Figure 1 As shown, it includes a cylinder 1 and a handle seat 2, the handle seat 2 is connected to the cylinder 1, a piston 3 is arranged in the cylinder 1, a sealing sleeve 9 is arranged on the inner end of the piston 3, a piston rod 4 is arranged on the outer sleeve of the piston 3 and the sealing sleeve 9, the piston rod 4 can move forward and backward along the piston and the sealing sleeve, and the sealing sleeve 9 realizes the sealing between the piston 3 and the piston rod 4.

[0018] A sleeve 10 is provided at the end of the piston rod 4 through a screw 11, and a core shaft 5 is provided at the end of the sleeve 10. The core shaft 5 is provided on the sleeve 10 through a fixing plate 8. The fixing plate 8 and the sleeve 10 are fixed by bolts. The core shaft 5, the sealing sleeve 9 and the piston 3 are all hollow structures, which are used to pass the steel rod and tension the steel rod.

[0019] A steel rod mounting end 6 is provided at the end of the core shaft for mounting the steel rod, and a steel rod fixing end 7 is provided at the tail of the piston 3 for fixing the steel rod. After the steel rod is inserted into the core shaft and the piston, the front end is fixed to the end of the core shaft by bolts, and the rear end is fixed to the steel rod fixing end at the tail of the piston by bolts, thereby fixing the steel rod.

[0020] The handle seat 2 is provided with a first oil inlet 15 and a second oil inlet 16, the first oil inlet is connected to the piston rod, and the second oil inlet is connected to the piston. Both the first oil inlet and the second oil inlet are provided with a connector body for connecting to the hydraulic system.

[0021] Gaskets 18 are provided between the sealing sleeve 9 and the piston 3 and between the sealing sleeve 9 and the piston rod 4 to improve the sealing performance between the sealing sleeve and the piston and the piston rod.

[0022] Guide rings 17 are provided on both the inner and outer sides of the tail of the piston rod 4 to facilitate the forward and backward movement of the piston rod along the piston, and washers 18 are provided on both the inner and outer sides of the tail of the piston rod to improve the sealing performance between the piston rod, the piston and the cylinder barrel, so as to prevent the hydraulic oil from entering the piston and the piston rod and causing leakage, thereby affecting the working performance of the piston.

[0023] A ruler placement groove is provided on the handle base 2 facing the moving direction of the piston rod, and a ruler 14 is arranged in the ruler placement groove. The top end of the ruler 14 is arranged on the ruler bracket 12 at the side end of the sleeve 10. The ruler 14 is arranged on the ruler bracket 12 through the handle screw 13 to indicate the distance moved by the piston rod.

[0024] When the utility model tensions the steel rod, the first oil port and the second oil port are connected to the hydraulic system respectively. During operation, the steel rod is first inserted into the jack, and after the steel rod is fixed to the installation end of the steel rod by bolts, hydraulic oil enters from the first oil port, and the hydraulic oil pushes the piston cylinder to extend, and at the same time drives the scale to extend. When the scale moves to a specified length, the hydraulic system stops supplying oil. At this time, the staff fixes one end of the steel rod extending out of the jack to the fixed end of the steel rod at the tail of the piston by bolts. At this time, the hydraulic control system switches direction, and oil is pressurized by the second oil port, and the hydraulic oil pushes the piston cylinder to retract. At this time, relative to the stretching movement of the steel rod, after the stretching is in place, the bolts at the fixed end of the steel rod are first removed, and then the pressure is released, and then the bolts at the installation end of the steel rod are removed, and then the jack is removed, and the tensioning work is completed.

Claims

1. Tension jack for high-speed railway track prefabricated plate production experiment, characterized by: The invention comprises a cylinder (1) and a handle seat (2) connected together, wherein a piston (3) is fixedly arranged in the cylinder (1), a sealing sleeve (9) is arranged at the inner end of the piston (3), and a piston rod (4) which can move forward and backward along the piston and the sealing sleeve is sleeved on the outside of the piston (3) and the sealing sleeve (9); a sleeve (10) is arranged at the end of the piston rod (4) through a screw (11), a mandrel (5) for passing a steel rod is arranged at the end of the sleeve (10), a steel rod mounting end (6) is arranged at the end of the mandrel (5), and a steel rod fixing end (7) for fixing the steel rod is arranged at the tail of the piston (3); a first oil inlet (15) connected to the piston rod and a second oil inlet (16) connected to the piston are arranged on the handle seat (2); a scale placement groove facing the movement direction of the piston rod is opened on the handle seat (2), and a scale (14) extending into the scale placement groove for indicating the movement distance of the piston rod is arranged on the sleeve (10).

2. The tensioning jack for high-speed railway track prefabricated plate production experiment according to claim 1 is characterized by: The core shaft (5) is arranged on the sleeve (10) via a fixing plate (8), and the fixing plate (8) and the sleeve (10) are fixed via bolts.

3. The tensioning jack for high-speed railway track prefabricated plate production experiment according to claim 1 is characterized by: A scale bracket (12) is provided at the side end of the sleeve (10), and a scale (14) is arranged on the scale bracket (12) via a handle screw rod (13).

4. The tensioning jack for high-speed railway track prefabricated plate production experiment according to claim 1 is characterized by: Gaskets (18) for improving sealing performance are provided between the sealing sleeve (9) and the piston (3) and between the sealing sleeve (9) and the piston rod (4).

5. The tensioning jack for high-speed railway track prefabricated plate production experiment according to claim 1 is characterized by: Guide rings (17) are provided on both inner and outer sides of the tail of the piston rod (4) to facilitate the movement of the piston rod.

6. The tensioning jack for high-speed railway track prefabricated plate production experiment according to claim 1 is characterized by: Gaskets (18) for improving the sealing performance between the piston rod (4), the piston (3) and the cylinder barrel (1) are provided on both the inner and outer sides of the tail of the piston rod (4).

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