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CN-122009112-A - Automatic adjustment device for empty and heavy truck of compact railway freight car

CN122009112ACN 122009112 ACN122009112 ACN 122009112ACN-122009112-A

Abstract

The invention discloses an automatic adjustment device for a compact railway freight car empty and weight car, and aims to solve the problems of complex structure, large volume and low reliability in the prior art. The device mainly comprises an integrated empty and weight vehicle adjusting valve, a flexible weight measurement signal transmission device and a compact weight measurement mechanism. The compact weight measuring mechanism detects the deformation of the bogie spring, the flexible device transmits the mechanical displacement signal, the integral regulating valve is internally integrated with the pressure limiting valve part and the sensing valve part and is communicated with the sensing valve part through the flow passage in the valve body, and the traditional external connecting pipeline is replaced. The sensing valve part receives the mechanical signal and converts the mechanical signal into an air pressure signal, the pressure limiting valve part compares and adjusts the mechanical signal according to the air pressure signal, and finally, the pressure of the brake cylinder matched with the load is output. The invention realizes the advantages of miniaturization, high reliability and easy arrangement and maintenance of the device through structure integration and functional decoupling, simplifies the structure and reduces the failure rate.

Inventors

  • LI XINGHUA

Assignees

  • 北京步锐克轨道技术有限公司

Dates

Publication Date
20260512
Application Date
20260206

Claims (9)

  1. 1. An automatic compact railway freight car empty and heavy car adjusting device, which is characterized by comprising: An integrated air-weight vehicle regulating valve (21) is internally integrated with a pressure limiting valve part (211) and a sensing valve part (212), wherein the sensing valve part (212) is provided with a push rod for receiving a mechanical displacement signal; A compact weight measuring mechanism (23) for detecting the deformation of the bogie suspension spring and outputting a mechanical displacement signal; The flexible weight measurement signal transmission device (22) is connected between the compact weight measurement mechanism (23) and the sensing valve part ejector rod of the integrated empty and weight vehicle adjusting valve (21) and is used for transmitting the mechanical displacement signal; The control pressure cavity of the pressure limiting valve part (211) is directly communicated with the output signal pressure cavity of the sensing valve part (212) through an internal flow passage arranged in the valve body.
  2. 2. The automatic empty and weight car adjusting device of the compact railway freight car according to claim 1, wherein the flexible weight measuring signal transmission device (22) is one of a steel wire flexible shaft, a conduit ball mechanism or a hydraulic mechanism.
  3. 3. The automatic adjustment device for empty and weight vehicles of compact railway freight car according to claim 2, wherein the steel wire flexible shaft comprises a high strength steel wire and a wear-resistant sheath, and both ends of the high strength steel wire are respectively provided with a joint integrally connected with the high strength steel wire.
  4. 4. The automatic empty and weight car adjusting device of the compact railway freight car according to claim 1, characterized in that the valve body of the integrated empty and weight car adjusting valve (21) is a single casting or a machined part, and the inside of the valve body is divided by a partition plate to form a pressure limiting valve cavity for accommodating the pressure limiting valve part (211) and a sensing valve cavity for accommodating the sensing valve part (212).
  5. 5. The automatic compact railroad car empty weight car adjustment apparatus as set forth in claim 1 or 4, wherein said sensor valve portion (212) includes: the valve cavity is divided into an upper cavity and a lower cavity by the piston, the upper cavity is communicated with the depressurization air cylinder (10) through an inner runner I (213 a), and the lower cavity is provided with an interface communicated with the brake cylinder (3); the piston is provided with the ejector rod and the ejector rod spring at the middle part; the sandwich valve is arranged at the valve port of the piston, is controlled to be opened and closed by the movement of the ejector rod and is used for controlling the on-off between the upper cavity and the lower cavity.
  6. 6. The automatic compact railway freight car empty and weight car adjusting device according to claim 4, wherein the upper end of the ejector rod is used as a signal receiving end, and the ascending travel of the ejector rod is limited by an external mechanical signal, so that the opening degree of the sandwich valve is controlled, and partial pressure air of the lower cavity is split into the upper cavity in proportion.
  7. 7. The automatic compact railway freight car empty car adjusting apparatus as claimed in claim 1, wherein the pressure limiting valve part (211) comprises: A diaphragm piston dividing the valve interior space into a first chamber and a second chamber that are airtight to each other, the first chamber communicating with the internal flow passage one to introduce the sensing signal pressure, the second chamber communicating with the brake valve output pressure and the brake cylinder feedback pressure; a pressure spring acting on one side of the diaphragm piston; And the valve core is connected with the diaphragm plate piston, moves along with the diaphragm plate piston and is matched with the air inlet valve seat so as to regulate the pressure output to the brake cylinder.
  8. 8. The automatic adjustment device for empty and weight of compact railway freight car according to claim 1, further comprising a stop lever portion (213) which is a guide rod with one end connected to said flexible weight measurement signal transmission device (22) and the other end acting on the sensor valve portion ram for converting a mechanical displacement signal into a mechanical limit for the ram travel.
  9. 9. The automatic adjustment device for empty and weight of compact railway freight car according to claim 1, characterized in that said compact weight measuring mechanism (23) is of purely mechanical structure, and a retractable contact is arranged inside the housing, said contact always maintaining a constant contact state with the bogie suspension measuring reference plate (12).

Description

Automatic adjustment device for empty and heavy truck of compact railway freight car Technical Field The invention relates to the field of automatic empty and heavy truck adjusting devices, in particular to an automatic empty and heavy truck adjusting device for a compact railway freight car. Background In order to ensure that the brake rate of the railway vehicle is basically unchanged under different loading states, an automatic empty and heavy vehicle adjusting device is generally required to be configured. The automatic empty and load car adjusting device generally determines the load state of the car by measuring the change of the load weight of the bogie or the deformation of the suspension springs, and adjusts the braking force according to the measurement result, thereby keeping the braking rate of the car stable. Currently, domestic railway trucks mainly adopt KZW-A type empty and load truck automatic adjusting devices (KZW-A type adjusting devices for short, as shown in fig. 1 and 2), and the type adjusting devices consist of pressure limiting valves 7 and weight measuring mechanisms. The pressure limiting valve 7 is connected with the brake valve 6, the brake cylinder 3, the pressure reducing air cylinder 10 and the sensing valve 9 through air pipelines. When the vehicle brakes, the pressure limiting valve 7 receives the compressed air output from the brake valve 6 and outputs the compressed air to the sensor valve 9 and the brake cylinder 3 through the internal passages thereof. The weight measuring mechanism is composed of a damping disc assembly 11 and a sensing valve 9, wherein the damping disc assembly 11 is kept in constant contact with a bogie suspension measuring reference plate 12, and moves up and down along with the bogie suspension measuring reference plate 12 when a bogie suspension spring is deformed due to a change in the load of a vehicle, thereby changing the clearance distance between the damping disc assembly 11 and the upper portion of the sensing valve 9. When the vehicle brakes, the piston in the sensing valve 9 moves upwards after being acted by the compressed air of the brake cylinder output by the pressure limiting valve, the feeler lever of the sensing valve is pushed to extend until the feeler lever contacts the inhibition disc assembly 11, and part of the compressed air is shunted into the pressure reducing air cylinder 10 connected with the sensing valve through a pipeline according to different piston displacement amounts (namely, measurement results of the inhibition disc assembly). The pressure limiting valve balances the pressure of the pressure reducing air cylinder 10, the output of the brake valve 6 and the pressure of the brake cylinder 3 through a piston diaphragm plate mechanism in the pressure limiting valve, so that the output pressure of the brake cylinder 3 is the same as that of the brake valve in a heavy vehicle state, and the pressure limiting valve is adjusted to a lower set value in an empty vehicle state, thereby realizing the adjustment of the braking force of the vehicle in different load states. The current KZW-A type adjusting device has three problems that firstly, the complexity of A product is increased due to the fact that an air pipeline is needed to be connected between A weight measuring mechanism and A pressure limiting valve, and the problem of air leakage of pipelines and joints is easy to occur, and the reliability of the product is limited. Disclosure of Invention The invention aims to overcome the defects in the prior art, provides an automatic adjustment device for a compact railway freight car empty-weight car, and aims to solve the problems of complex structure, huge volume, inconvenient arrangement and insufficient reliability in the prior art. Therefore, the invention provides an automatic adjustment device for a compact railway freight car empty-load car, which comprises the following components: the integrated air-weight vehicle regulating valve is internally integrated with a pressure limiting valve part and a sensing valve part, wherein the sensing valve part is provided with a push rod for receiving a mechanical displacement signal; the compact weight measuring mechanism is used for detecting the deformation of the suspension spring of the bogie and outputting a mechanical displacement signal; the flexible weight measurement signal transmission device is connected between the compact weight measurement mechanism and a sensing valve part ejector rod of the integrated empty and heavy vehicle adjusting valve and is used for transmitting the mechanical displacement signal; the control pressure cavity of the pressure limiting valve part is directly communicated with the output signal pressure cavity of the sensing valve part through an internal flow passage arranged in the valve body. As a preferable technical scheme of the application, the flexible weight measurement signal transmission device is one of a steel wire flexible