Detection device for railway vehicle sanding valve

Abstract

The utility model discloses a detection device for a railway vehicle sanding valve, which comprises a sanding valve body, a sand box, a sand box mounting frame, a sand guide pipe, a measuring cup and a weighing platform, the sand box is mounted on the sand box mounting frame, the sanding valve body is detachably mounted on the sand box through bolts, an air inlet seat of the sanding valve body is connected with an air inlet pipe, and the sand guide pipe is connected with a sand guide pipe. An electromagnetic valve is arranged on the air inlet pipe, the air pressure introduced into the sanding valve body and the ventilation time are controlled through the electromagnetic valve, one end of the sand guiding pipe is connected with a sand outlet nozzle of the sanding valve body, and the other end of the sand guiding pipe extends into the measuring cup and is used for guiding sand grains sprayed out of the sanding valve body into the measuring cup; the measuring cup is arranged on the weighing table, and the sanding amount is measured through weighing. Through linkage of the electromagnetic valve and the weighing platform, quantitative control and measurement of sanding parameters are achieved, the detection precision is improved, meanwhile, the angle of the sand box is adjustable, scenes such as ramp running can be simulated, meanwhile, disassembly and assembly of the valve body and sand filling are facilitated, the overall structure is simple, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle equipment technology, and specifically to a device for testing the sand-spreading performance of a sand-spreading valve on a rail vehicle. Background Technology

[0002] During the operation of rail vehicles, the adhesion performance between the wheel and rail is a key factor affecting vehicle braking, traction, and operational safety. Rail vehicles typically use a sand-spraying device to spray sand onto the wheel-rail contact surface to increase friction and improve adhesion. As a core component of this device, the performance of the sand-spraying valve directly affects the sand-spraying effect and vehicle operational safety. Therefore, rigorous testing and inspection of the sand-spraying valve are crucial to ensuring its reliable quality and stable performance.

[0003] Currently, sand-spreading tests on rail vehicle sand-spreading valves mainly employ on-vehicle testing or simple bench testing methods. However, on-vehicle testing suffers from high costs, long cycles, and low safety, and it is difficult to simulate various complex operating conditions in a laboratory environment. Simple bench testing methods, on the other hand, often fail to accurately simulate the sand-spreading process during actual operation, leading to significant discrepancies between test results and actual conditions, and thus failing to effectively evaluate the performance of the sand-spreading valve. Utility Model Content

[0004] The purpose of this invention is to overcome the functional limitations and operational inconvenience of existing sand-spraying valve testing devices, and to provide a sand-spraying valve testing device that is compact in structure, precise in control, and easy to operate.

[0005] The technical solution adopted in this utility model is as follows: A testing device for a sand-spreading valve of a rail vehicle includes a sand-spreading valve body, a sand box, a sand box mounting frame, a sand-guiding pipe, a measuring cup, and a weighing platform; the sand box is installed on the sand box mounting frame, and the sand-spreading valve body is detachably installed on the sand box by bolts; the air inlet seat of the sand-spreading valve body is connected to an air inlet pipe, and a solenoid valve is provided on the air inlet pipe to control the air pressure and air passage time entering the sand-spreading valve body; one end of the sand-guiding pipe is connected to the sand outlet of the sand-spreading valve body, and the other end extends into the measuring cup to guide the sand particles sprayed from the sand-spreading valve body into the measuring cup; the measuring cup is placed on the weighing platform to measure the amount of sand spread by weighing.

[0006] Furthermore, the sand box mounting frame includes a base and two support frames vertically fixed to both sides of the base, with the sand box installed between the two support frames.

[0007] Furthermore, horizontal support shafts are fixedly connected to both sides of the sand box, and through holes are radially intersecting on the support shafts. The tops of the two support frames are fixedly connected to the bearings that match the support shafts. Locking holes that match the through holes on the support shafts are opened on the bearings. The support shafts on both sides of the sand box are placed in the bearings and the angle is fixed by a pin passing through the selected through hole and engaging with the locking hole.

[0008] Furthermore, the bearing seat is provided with an upward-opening U-shaped groove, which matches the support shaft, and the locking hole is opened on the side wall of the U-shaped groove.

[0009] Furthermore, the sand box is equipped with an openable and closable valve plate at the sand outlet.

[0010] Furthermore, the top of the sand box is provided with a sand injection port and a cover that matches it.

[0011] Furthermore, the bottom of the sand box mounting bracket is equipped with multiple roller assemblies.

[0012] The beneficial effects of this utility model are as follows: This utility model uses a solenoid valve to precisely control the intake pressure and ventilation time, combined with the linkage measurement of the measuring cup and the weighing platform, to quantitatively record the amount and uniformity of sand spreading under different air pressure conditions, avoiding the errors of traditional manual timing estimation and improving the accuracy of the test; the sand box can be quickly adjusted to different tilt angles through the pin-type angle adjustment structure of the support shaft and the shaft seat. On the one hand, it can accurately simulate the sand spreading requirements of rail vehicles running on slopes and other scenarios, improving the practicality of the test data. On the other hand, adjusting the tilt angle of the sand box through the pin-type structure not only meets the simulation requirements of different working conditions, but also facilitates the disassembly and assembly of the sand spreading valve body and the sand filling process. For example, when the sand box is adjusted to the bottom facing up, the valve body can be quickly replaced. When the bottom facing down, it is convenient to add sand through the top sand filling port and conduct tests. Moreover, the angle can be fixed without complicated tools, making the operation simple and the fixation reliable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a structural schematic diagram of the sand box mounting bracket of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the sand box of this utility model. Detailed Implementation

[0016] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0017] like Figures 1-3 As shown in the figure, this embodiment provides a testing device for a sand-spreading valve on a rail vehicle, including a sand-spreading valve body 1, a sand box 2, a sand box mounting frame 3, a sand inlet pipe 4, a measuring cup 5, and a weighing platform 6. The sand-spreading valve body 1 is the object to be tested, and it is detachably installed at the bottom of the sand box 2 by bolts, connecting with the sand outlet 23 of the sand box 2. The sand box 2 is used to hold test sand, simulating the working environment of the sand-spreading valve on an actual vehicle. The sand box 2 is mounted on the sand box mounting frame 3. The sand box mounting frame 3 is the load-bearing and support structure of the entire device.

[0018] The air intake seat of the sand-spreading valve body 1 is connected to an air intake pipe 7, providing compressed air to drive the sand-spreading valve. A solenoid valve 8 is installed on the air intake pipe 7, controlling the duration of compressed air flow into the sand-spreading valve to simulate the actual sand-spreading operation duration, and adjusting the compressed air pressure flowing into the sand-spreading valve to simulate the pressure of the vehicle's air system under different operating conditions. One end of the sand-guiding pipe 4 is connected to the sand outlet of the sand-spreading valve body 1, and the other end extends into the measuring cup 5. This guides the sand particles sprayed from the sand-spreading valve body 1 into the measuring cup 5, preventing sand particles from splashing and ensuring that all sprayed sand enters the measuring cup for accurate measurement. The measuring cup 5 is placed on a weighing platform 6, and the amount of sand spread is accurately measured by weighing.

[0019] like Figure 2 , Figure 3 As shown, in this embodiment, horizontal support shafts 22 are fixedly connected to both sides of the sand box 2. Through holes are radially intersecting on the support shafts 22. The sand box mounting bracket 3 includes a base 31 and two support stands 32 vertically fixed to both sides of the base 31. The support shafts 22 are fixedly connected to the top of the two support stands 32. A U-shaped groove with an upward opening is provided on the shaft seat 33, matching the support shaft 22. A locking hole 34 is provided on the side wall of the U-shaped groove. The support shafts 22 on both sides of the sand box 2 are placed inside the shaft seats 33 on both sides, and the angle is fixed by a pin passing through the selected through hole and engaging with the locking hole 34. This adjustable design allows for flexible adjustment of the sand box's tilt angle.

[0020] In this embodiment, the top of the sand box 2 is provided with a cover 21 that matches the sand injection port, and the sand outlet 23 of the sand box 2 is provided with an openable and closable valve plate. By setting the valve plate, the problem of sand leakage before the sand spreading valve test is solved.

[0021] In this embodiment, in order to improve the mobility of the detection device, a plurality of roller assemblies 35 are installed at the bottom of the sand box mounting frame 3.

[0022] With the aid of the teachings present in the foregoing description and related drawings, those skilled in the art will conceive of many modifications and other embodiments of the present invention. Therefore, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are considered to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a general and descriptive sense only and are not intended to be limiting.

Claims

1. A detection device for a sand-spreading valve on a rail vehicle, comprising a sand-spreading valve body (1), characterized in that: It also includes a sand box (2), a sand box mounting frame (3), a sand inlet pipe (4), a measuring cup (5), and a weighing platform (6); the sand box (2) is installed on the sand box mounting frame (3), and the sand spreading valve body (1) is detachably installed on the sand box (2) by bolts. The air inlet seat of the sand spreading valve body (1) is connected to an air inlet pipe (7), and an electromagnetic valve (8) is provided on the air inlet pipe (7). The air pressure and air passage time entering the sand spreading valve body (1) are controlled by the electromagnetic valve (8); one end of the sand inlet pipe (4) is connected to the sand outlet of the sand spreading valve body (1), and the other end extends into the measuring cup (5) to guide the sand particles sprayed from the sand spreading valve body (1) into the measuring cup (5); the measuring cup (5) is placed on the weighing platform (6) to measure the amount of sand spread by weighing.

2. The detection device for a sand-spreading valve of a rail vehicle as described in claim 1, characterized in that: The sand box mounting frame (3) includes a base (31) and two support frames (32) vertically fixed on both sides of the base (31), and the sand box (2) is installed between the two support frames (32).

3. The detection device for a sand-spreading valve of a rail vehicle as described in claim 2, characterized in that: The sand box (2) is fixedly connected to horizontal support shafts (22) on both sides. Through holes are radially intersecting on the support shafts (22). The tops of the two support brackets (32) are fixedly connected to the bearing seats (33) that match the support shafts (22). Locking holes (34) that match the through holes on the support shafts (22) are opened on the bearing seats (33). The support shafts (22) on both sides of the sand box (2) are placed in the bearing seats (33) and the angle is fixed by the pins passing through the selected through holes and engaging with the locking holes (34).

4. The detection device for a sand-spreading valve of a rail vehicle as described in claim 3, characterized in that: The bearing seat (33) is provided with an upward-opening U-shaped groove, which matches the support shaft (22), and the locking hole (34) is opened on the side wall of the U-shaped groove.

5. The detection device for a sand-spreading valve of a rail vehicle as described in claim 1, characterized in that: The sand box (2) is provided with an openable and closable valve plate at the sand outlet (23).

6. The detection device for a sand-spreading valve of a rail vehicle as described in claim 1, characterized in that: The top of the sand box (2) is provided with a cover (21) that matches the sand injection port.

7. The detection device for a sand-spreading valve of a rail vehicle as described in claim 1, characterized in that: The bottom of the sand box mounting bracket (3) is equipped with multiple roller assemblies (35).

Images