A sleeper type electro-hydraulic switch machine

Abstract

The invention provides a sleeper type electrohydraulic switcher. The sleeper type electrohydraulic switcher comprises a hydraulic power unit and a locking unit, wherein the hydraulic power unit is connected with the locking unit through an oil pipe; the sleeper type electrohydraulic switcher is characterized in that: the hydraulic power unit comprises a pump valve group and a speed change mechanism, wherein the pump valve group is of a pump valve integrated structure; the locking unit comprises a locking mechanism and an extruding mechanism, and the locking mechanism generates horizontal force in the action process without oblique force; the extruding mechanism is elastic, has a turnout switching indication function, and can adsorb external impact and protect the locking unit; and the sealing protection grades of the hydraulic power unit and the locking unit are both above IP67. The sleeper type electrohydraulic switcher is small in size, little in occupied space, simple in structure, excellent in sealing performance, high in protection grade, little in failure, little in maintenance work, excellent in stability and high in reliability and does not affect mechanical packing.

Description

technical field [0001] The invention relates to a sleeper type electro-hydraulic switch machine suitable for railway turnouts. It is installed between two basic rails, is suitable for switching and locking of railway turnouts, and can correctly reflect the terminal position status of the turnouts. Background technique [0002] The switch machine is the core and main body of the railway switch switching system, which is used to complete the switching and locking of the switch. At present, most of the switch machines used in China are installed on the outside of the basic rail of the turnout. This installation method will make the connecting rod between the switch machine and the point rail of the switch longer, the stress state of the rod is not good, and the installation is complicated. Occupies a lot of space, especially for the subway. Due to the limitation of space, the outer installation of the basic rail of the turnout is adopted, and it is necessary to reserve a speci...

AI Technical Summary

Problems solved by technology

At present, most of the switch machines used in China are installed on the outside of the basic rail of the turnout. This installation method will make the connecting rod between the switch machine and the point rail of the switch longer, and the force state of the rod is not good, and the installation is complicated. Occupies a lot of space, especially for the subway. Due to the limitation of space, the installation method of the outer side of the basic rail of the turnout is adopted, and it is necessary to reserve a special space for the switch machine in the subway tunnel. In addition, the switch machine is installed on the outer side of the basic rail. Tamping of railway track bed makes a difference

[0003] At present, the hydraulic power unit of the electro-hydraulic switch machine used in China is mostly a split structure of the oil pump valve body. The oil pump and the control valve are generally connected together through oil pipes and joints. This structure not only makes the internal structure of the machine complex, but also has many interfaces. Easy to cause leakage and many failure points

[0004] At present, the protection level of the switch machines used in China is not high, and the inside of the machine is prone to damp or water, especially in the humid environment of the subway, which will cause the internal parts of the switch machine to rust, which not only affects the life of the switch machine, but also affects the switch. machine stability

[0005] At present, the locking mechanism in the switch machine used in China has a large locking force during the process from the point machine locking to the completion of the locking, which will affect the reliability of the close-fitting representation of the turnout.

In addition, the mating surfaces of the locking mechanism in the switch machine are mostly inclined surfaces during the conversion process, which will generate oblique component forces, which will affect the force state and stability of the switch machine during the conversion process

[0006] Comparative Document 1 "Railway Communication Signals" Volume 42, No. 2, in February 2006, disclosed a sleeper type electro-hydraulic switch machine, which includes a hydraulic station, SH6GZ type conversion locker, transfer box, hook-shaped outer lock Locking device, the locking device includes 2 lock blocks, locking iron, action rod and oil cylinder, the hydraulic station needs to be connected with the conversion locker through the transfer box, which increases the leakage fault point in the circuit; the conversion locker passes through the outer lock The closing device is connected with the turnout, which occupies a relatively large space. In addition, the hydraulic station is installed at the head of the sleeper. For lines with strict space requirements such as subway lines, a certain amount of roadside space is still required for installation.

[0007] The comparative document 2CN201235832Y discloses a pump and valve manifold block for railway switch machines, which does not integrate speed control valves and sensor interfaces, which cannot meet the requirements of intelligent development of switch machines.

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