JPH11165632A - Automatic testing device for brake valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically perform the test of a brake valve stably without erroneous reading, recording, etc. SOLUTION: A drive motor 4 rotates a brake valve cam shaft mounted in a brake valve placing part, and a control part 71 rotates the motor 4 in conformity to a test program stored in memory previously. Pressure sensors 31-35 measure the output pressure from the brake valve, and a sensing part 62 senses the opening/closing condition of the electric contact of the brake valve. A data processing part 72 determines the test result on the basis of the measuring and sensing results from the pressure sensors 31-35 and sensing part 62 given as output with the rotation of the brake valve cam shaft generated by the motor 4, and an output part 73 outputs the test result given by the data processing part 72 in the specified format in which the specifications and measurement values are put in comparison.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a railway vehicle (train).
The present invention relates to an automatic brake valve tester for automatically testing a brake valve provided in a brake device such as the one described above.

[0002]

2. Description of the Related Art Various types of brake valves having different types depending on the type of railway vehicle (train) are installed in a brake device of a railway vehicle. The basic purpose and function of this type of brake valve does not change depending on the type.
Here, a description will be given by taking the example shown in FIGS. 6A and 6B as an example.

In FIG. 6, reference numeral 49 denotes a brake valve, and reference numeral 50 denotes a brake valve main body. As shown in FIG. 6B, the brake valve main body 50 is attached to a footrest 55. The brake valve body 50 is provided with an electric terminal block 52 to which an electric signal wiring (not shown) is connected from outside. An air connection pipe 53 (not shown) from the outside is connected to an air connection port 53 provided in the footrest 55, and these air control pipes are connected to the brake valve main body through a flow path passing through the inside of the footrest 55. It communicates with an air connection port provided on the lower surface of 50. Inside the brake valve main body 50, an electric section 50a having an electric contact cam row for sending a command to each vehicle is provided at an upper portion thereof, and an air section having a cam row for controlling an air brake is provided at a lower portion thereof. A part 50b is provided. The cam rows of the electric section 50a and the air section 50b are integrally connected to a brake valve camshaft 54 in a vertically multi-stage manner, and the brake valve camshaft 54 is
By the operation, the electric contact cam acts on the electric part 50a corresponding to the rotation angle, and the air part 50b
Has a structure that controls the required braking force by opening and closing various air valves.

FIG. 6A shows the relationship between the operating position of the brake valve handle 51 and the braking action. Each operation position and its function will be briefly described. (1) 165 ° “handle removal position” The brake valve handle 51 can be detached and attached only in this position. In this position, each poppet valve incorporated in the brake valve body 50 is fully closed, and the state before switching is maintained. (2) 0 ° “relaxed position” The full air brake is released at the position where the stopper does not mechanically rotate to the left by the stopper, that is, the position where the rotation of the brake valve handle 51 is restricted at this time. . That is, the contact point at which the brake valve handle 51 comes into contact with the stopper to restrict the rotation is the reference point for the handle operation.

(3) 80 ° “all direct through brake position” A position where the braking force is maximum (4) 0 ° to 80 ° “self-wrap portion” During this time, the brake is actuated by the action of the self-lap valve in the brake valve body 50. A braking force proportional to the operation angle of the valve handle 51 is obtained. (5) 100 ° “overlap position” Only the balancing piston valve exhaust valve in the brake valve body 50 is opened, and a constant braking force is maintained. (6) 115 ° “service brake position” Only the balancing piston valve exhaust valve and the brake operation valve are opened, and the automatic braking state is maintained.

(7) 140 ° “Emergency brake position” In addition to the balancing piston valve exhaust valve and the brake action valve in the brake valve body 50, the emergency valve is opened, the control air circuit is rapidly opened, and the “emergency brake” Is applied, and this is maintained. FIG. 7 shows the brake valve handle 51 described above.
3 shows the relationship between the operation position, i.e., the rotation angle of the brake valve cam shaft 54, the cam lift, and the air pressure. FIG. 8 similarly shows the relationship between the operating position of the brake valve handle 51 and the opening and closing of the electrical contacts.

[0007] The above-mentioned brake valve is installed in the driver's seat of the train, and the driver always operates the brake valve handle 51 during the operation of the train to decelerate and stop the train, thereby operating the train safely and accurately. It is an important device to do. Therefore, the brake valve must be periodically disassembled and inspected to confirm its performance.

In the test of the brake valve, the air portion 50b
, The correct specified handle position (camshaft angle)
To check whether the valve opens and closes, and whether the output air pressure at each handle position (camshaft angle) is at a specified value, and in the electric section 50a, whether each electric contact opens and closes at a specified camshaft angle. Check. In addition, it is necessary to check air leaks from various parts of the valve, resistance to operating the brake valve handle 51, and sensitivity (the minimum operating pressure is within a specified value).

[0009]

As described above, the test of the brake valve is extensive and has many test items. Conventionally, the operator has operated these while observing the steering wheel angle with a ruler (protractor), while reading the pressure value and the change in the contact signal visually from the instrument and manually recording them. Therefore, there is a problem that not only the labor of the worker becomes excessive and the working time is long, but also the reading and the recording are erroneously performed, and the results vary due to the habit of the worker.

The present invention has been made in view of the above circumstances, and a brake valve capable of automatically performing a stable test without causing a reading error or a recording error, thereby greatly reducing a burden on an operator. It aims to provide an automatic test equipment.

[0011]

According to a first aspect of the present invention, there is provided an automatic test apparatus for a brake valve, which is provided in a brake device such as a vehicle and rotates a cam shaft of a brake valve body. An automatic brake valve tester for testing a brake valve that outputs a pressure necessary for braking according to a rotation angle of the camshaft and outputs an electric signal, the brake valve being engaged with the camshaft and rotating the camshaft. A drive motor, a pressure sensor that measures a pressure output according to a rotation angle of the camshaft rotated by the drive motor, and a pressure sensor that opens and closes according to the rotation angle of the camshaft rotated by the drive motor. A control unit for controlling the driving of the drive motor; and a rotation of the camshaft based on signals from the pressure sensor and the detection unit. It is characterized by comprising a data processing unit for determining the closed state of the output pressure and electrical contacts of the brake valve as a test result according to. This allows
When the camshaft of the brake valve body is rotated by the drive motor whose drive is controlled by the control unit, measurement of the output pressure associated with this rotation angle and detection of opening and closing of the electrical contact are performed, and based on these measurement and detection results, Then, in the data processing unit, the output pressure state and the open / close state of the electric contact according to the rotation angle of the cam shaft are obtained as test results.

According to a second aspect of the present invention, there is provided an automatic brake valve testing apparatus according to the first aspect.
A reference point is a contact point at which the handle attached to the camshaft abuts a stopper provided on the brake valve body to restrict the rotation of the camshaft, and rotates from the reference point in a direction opposite to the rotation regulating side. And tests the output pressure and the open / closed state of the electrical contacts according to the rotation angle from the reference point. In other words, the contact point where the handle abuts the stopper provided on the brake valve body and the rotation of the camshaft is regulated is set as the reference point, and from this reference point, the output pressure corresponding to the rotation angle is accurately measured and the electrical contact point is set. Open / close detection is performed.

According to a third aspect of the present invention, there is provided an automatic brake valve testing apparatus according to the first or second aspect, further comprising a detection circuit for detecting leakage of the brake valve. I have. Thus, the presence or absence of leakage of the brake valve is detected by the leakage detection circuit.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an automatic brake valve testing apparatus according to an embodiment of the present invention. The system configuration of the automatic brake valve test apparatus according to the embodiment of the present invention includes an automatic test apparatus main body 60 and a control panel 70 as shown in FIG. The control panel 70 is provided separately from the automatic test apparatus main body 60, and includes a control section 71 for automatically controlling the automatic test apparatus, a data processing section 72 for processing and obtaining test results, and a printer for outputting the test results in a predetermined form. And an output unit 73.

A control section 71 provided on the control panel 70 controls the driving of the drive motor 4 of the automatic test apparatus main body 60 and a data processing section 72 of the control panel 70, and is controlled by a test program stored in advance. The drive of the drive motor 4 is controlled. The data processing unit 72 includes pressure sensors 31 to 3 provided in the automatic test apparatus main body 60.
5 is input. Further, a signal is also input to the data processing unit 72 from the detection unit 62 that detects the open / close state of the electrical contact of the brake valve body 50. The data processing unit 72 processes the signals from the pressure sensors 31 to 35 and the detection unit 62, and measures the output pressure of the brake valve body 50 and the measured value of the open / close state of the electrical contact and the standard value stored in advance. The data processing unit 72 outputs a signal to the output unit 73 to output the obtained test result in a predetermined form. . The output section 73 outputs the test result from the data processing section 72 in a predetermined form by means such as printout.

Next, the automatic test apparatus main body 60 will be described. As shown in FIG. 2 and FIG.
0 is a vertical cube, and when roughly divided, reference numeral 60a is a brake mounting portion on which the brake valve main body 50 to be subjected to the test is mounted, and reference numeral 60b is the brake valve cam shaft 54 of the test brake valve main body 50 automatically. The drive unit to rotate and others are hangars for storing various devices required for the test.

First, the structure of the brake valve mounting portion 60a will be described. Reference numeral 8 denotes a slide table movable in the X and Y directions, which is moved by rotating handles 8a and 8b. Slide table 8
A brake valve mounting base 3 is provided on the upper part of the brake valve mounting base 3. The brake valve mounting base 3 is detached from the test brake valve main body 50 (in FIG. Thing) is attached.

On the upper surface of the brake valve mounting base 3, holes are opened in the number of air connection ports on the lower surface of the brake valve body 50. The position of the air connection port on the lower surface of the brake valve body 50 differs depending on the type. That is, the pipe seat 11
Are the holes on the upper surface of the brake mount 3 and the brake valve body 50
Is provided between the brake mounting base 3 and the brake valve main body 50 in order to communicate the air connection ports with each other.
Therefore, the pipe seat 11 is prepared for each type of the brake valve body 50 to be tested.

A plurality of air connection ports are formed on the side surface of the brake valve mounting base 3, and these air connection ports are connected to the main body 60 of the automatic test apparatus by the connection hose 14. The brake valve mounting portion 60a is provided with an electrical connection cord 61 corresponding to the electrical terminal block 52 for electrical connection of the brake valve body 50. The electrical connection cord 61 connects the electrical contacts of the brake valve main body 50 to the detection unit 62 in the automatic test apparatus main body 60 via the electric terminal block 52.

Next, the driving section 60b will be described. The automatic test apparatus main body 60 is provided with a horizontal slide table 5 that can be moved in the horizontal direction. Further, the horizontal slide table 5 is provided with a vertical slide table 6 that can be moved vertically by a vertical handle 6a. ing. The drive motor 4 is provided on the upper part of the vertical slide table 6. It is desirable to use a servomotor whose rotation angle can be easily controlled as the drive motor 4. The distal end of the motor drive shaft 4a of the drive motor 4 is engaged with the test brake valve handle 26 attached to the head of the brake valve cam shaft 54 of the brake valve body 50, and the motor drive shaft 4a is A coupling 4b for transmitting rotation to the brake valve cam shaft 54 is attached.

The test brake valve handle 26 attached to the brake valve camshaft 54 is equivalent to a brake valve handle 51 (FIG. 6b) operated by a driver in an actual vehicle, but the upper part is the same as the coupling 4b. It is shaped to engage. The test brake valve handle 26 can be mounted at the extraction position, similarly to the actual brake valve handle 51. 2 and 3, reference numeral 1 denotes an air source connection port,
Reference numeral 2 denotes a power connection port.

Next, referring to FIG.
Will be described. In the figure, reference numerals 30a to 30
g is a brake valve connection port corresponding to the air connection port of the brake valve body 50. Each brake valve connection port 3 as shown
0a to 30g are provided with pressure sensors 31 to 35 for detecting the pressure in the circuits, respectively. The signals from the pressure sensors 31 to 35 are shown in FIG.
Is sent to the data processing section 72 of the control panel 70 as shown in FIG.

In FIG. 4, "to 23" is connected to the leak check exhaust port (detection circuit) 23 (see FIG. 2) provided in the automatic test apparatus main body 60, and the ON / OFF valve ( When the PV-) is opened, if there is a leak, the leaked air flows to the leak check exhaust port 23. That is, the presence / absence of leakage of each valve can be detected by the leakage confirmation exhaust port 23. Further, “to 24” in FIG.
It is connected to a drain discharge cock 24 (see FIG. 2) provided at a lower portion of the air reservoir 0 to discharge the drain of each air reservoir. Further, pressure gauges 16, 17, 18, 19, and 20 are provided at main portions in the circuit, respectively. These pressure gauges 16, 17, 18, 19, and 20 are provided with automatic test equipment as shown in FIG. It is arranged in the main body 60 so that the pressure of each main part can be visually checked. Note that reference numerals MR, ER, CP, BP,
FV is an air reservoir, MR is an original air reservoir, ER
Is a balance air reservoir, CP is a control tube air reservoir, BP
Is a brake pipe air reservoir, and FV is an air supply valve pipe air reservoir.

Next, a description will be given of a case in which a brake valve is tested by the automatic test apparatus having the above configuration. 1. Attachment and Preparation of Brake Valve for Test First, the brake valve body 50 to be tested is attached to the brake valve mount 3 with the pipe seat 11 interposed. Next, the test brake valve handle 26 is attached, the slide table 8 and the horizontal slide table 5 are operated, and the axes of the motor drive shaft 4a and the brake valve cam shaft 54 are aligned. next,
The drive motor 4 is lowered by the vertical slide table 6, and the coupling 4b and the test brake valve handle 26 are moved.
And are engaged. As a result, the rotation of the drive motor 4 is transmitted to the brake valve cam shaft 54. further,
The electric connection cord 61 is connected to the electric terminal block 52 of the brake valve body 50 to complete the preparation.

2. Automatic Test The automatic test is performed according to the following procedure in accordance with a test program input to the control unit 71 of the control panel 70 in advance. (1) Determination of the zero position of the handle position The test brake valve handle 26 (therefore, the brake valve camshaft 54) which is in the sampling position at the start of the test.
Is rotated clockwise as viewed from above by driving the drive motor 4. As the rotation proceeds, the claw portion of the test brake valve handle 26 hits the stopper of the brake valve body 50. At this time, there is no change in the rotation angle of the drive motor 4. By monitoring this change in the rotation angle, it is confirmed that the test brake valve handle 26 has hit the stopper. Then, the test brake valve handle 26
When it is confirmed that has hit the stopper, the drive motor 4
Is stopped, and the rotation of the test brake valve handle 26 is stopped. Then, the position of the motor shaft of the drive motor 4 at this time is stored as a zero point (reference point) of the rotation angle of the brake valve cam shaft 54. Thereafter, the rotation angle of the brake valve cam shaft 54 is determined based on the zero point.

(2) Various tests When the zero point position is determined, the operation proceeds to various tests. The drive motor 4 causes the test brake valve handle 26 to start rotating at a predetermined speed in a counterclockwise direction.
The drive current value and the signals of the pressure sensors 31 to 35 and the detection unit 62 are sent to the data processing unit 72, where the measurement values of predetermined items are sampled, and the pre-stored standard values are compared. The compared test results are obtained, and a pass / fail judgment is made. The test result is transmitted from the data processing unit 72 to the output unit 73, and is output in, for example, a predetermined form as shown in FIG.

Now, this test will be described in more detail. Self-Lap Adjustment Test This test is to test whether a predetermined CP pressure is generated at a predetermined handle angle by a self-lap cam # 5 shown in FIG. 7, for example. That is, it is tested whether the measured CP pressure is within the range of the standard value. Note that the standard value is set in the range of the CP pressure at a predetermined angle as shown in the upper left column of FIG. In other words, in the automatic test apparatus, by rotating the drive motor 4, the brake valve cam shaft 54 is rotated, and while measuring the angle,
At the same time, the data of the CP pressure sensor 32 shown in FIG. 4 is read, and the pressure value when the angle reaches a predetermined angle is stored. This is performed within a predetermined rotation range of the test brake valve handle 26 (0 ° to 165 ° in this case).

Next, the poppet valve opening / closing angle test will be described with reference to, for example, the exhaust valve cam # 3 shown in FIG.
In the test of the exhaust valve cam, as shown in the upper right column of FIG. 5, the angle at the start of opening and the angle at the end of closing are the objects of the test, and the automatic test apparatus also detects this by a change in air pressure. I have to. That is, the measurement value of the ER pressure sensor 31 in FIG. When the valve starts to be opened by the # 3 exhaust valve cam, the pressure in the pipe naturally starts to change. Therefore, the opening angle can be known from the change in the pressure. Also, the angle at the end of closing can be known in a similar manner. Note that #
The same test is performed for each of the cams # 1, # 2, # 4, and # 6.

Ventilation Capacity Test Next, the test of the ventilation capacity of each valve will be described with reference to a brake containing valve cam # 6 as an example.
Is set to the "normal" or "emergency" position, and after all the BP pressure is discharged, the BP pressure is quickly switched to the "relaxed" position, and the rise time of the BP pressure is measured by the pressure sensor 35. Also,
The fall time of the BP pressure when switching from the "relaxed" position to the "normal" or "emergency" position is measured in the same manner. Then, as shown in the upper middle column of FIG. 5, the measured value is compared with the standard value.

Handle Resistance Test The automatic tester also measures the rotational resistance when the handle is operated, and also compares the measured value with a standard value, as shown in the lower middle column of FIG. This is performed by calculating a driving force from a driving current value of the driving motor 4.

Electric Contact Opening / Closing Angle Test In the automatic test apparatus, the opening / closing angle of the electric contact is measured based on the drive current value of the drive motor 4 and the signal from the detection unit 62, and as shown in the lower right column of FIG. Next, the measured value is compared with the standard value.

As described above, according to the above-described automatic brake valve test apparatus, the drive motor 4 is driven by the control unit 71 and the brake valve cam shaft 5 of the brake valve 49 is driven.
When the rotation of the brake valve cam shaft 54 is performed, the output pressure is measured in accordance with the rotation angle and the opening and closing of the electrical contacts is detected. Test results such as output pressure, output timing, and opening / closing state of the electrical contacts are obtained in accordance with the above. Since the test results are recorded in a predetermined form in the output unit 73, the operation results are conventionally manually operated and recorded. The test can be performed almost automatically, whereby the labor required for the test operation can be greatly reduced, and the test operation can be performed in a short time. In addition, since there is no variation in measured data unlike manual measurement, extremely accurate and highly reliable test results can be obtained. Further, a place where it is necessary to recognize a delicate change such as a leak check can be easily checked by a leak check exhaust port 23 provided on the operation panel.

[0033]

As described above, according to the automatic brake valve tester of the present invention, the following effects can be obtained. According to the automatic brake valve test device of the first aspect, when the camshaft of the brake valve body is rotated by the drive motor whose drive is controlled by the control unit, the output pressure is measured according to the rotation angle and the electrical contact is measured. Open / close detection
Based on these measurement and detection results, the data processing unit obtains, as test results, an output pressure state and an electric contact opening / closing state corresponding to the rotation angle of the camshaft.
The state of the brake valve can be easily grasped from the obtained test result. That is, since the test work of the brake valve, which has been conventionally performed manually, can be automatically performed, the labor required for the test work can be significantly reduced, and the test work can be performed in a short time. Can be. In addition, since there is no variation in measured data unlike manual measurement, extremely accurate and highly reliable test results can be obtained.

According to the brake valve automatic testing device of the present invention, the contact point at which the handle abuts the stopper provided on the brake valve body to restrict the rotation of the camshaft is set as the reference point, and from this reference point. It is possible to accurately measure the output pressure corresponding to the rotation angle and detect the opening and closing of the electrical contact. According to the brake valve automatic testing device of the third aspect, the presence / absence of leakage of the brake valve can be easily detected by the leakage detection circuit.

[Brief description of the drawings]

FIG. 1 is a functional block diagram illustrating the configuration and functions of an automatic brake valve test device according to an embodiment of the present invention.

FIG. 2 is a front view of the automatic test apparatus main body for explaining the configuration and structure of the automatic test apparatus main body constituting the brake valve automatic test apparatus according to the embodiment of the present invention.

FIG. 3 is a side view of the automatic test apparatus main body for explaining the configuration and structure of the automatic test apparatus main body constituting the brake valve automatic test apparatus according to the embodiment of the present invention.

FIG. 4 is a schematic circuit diagram illustrating a piping structure in an automatic test device main body constituting the automatic brake valve test device according to the embodiment of the present invention.

FIG. 5 is a diagram showing test results of a brake valve tested by the automatic brake valve test device according to the embodiment of the present invention.

6A and 6B are diagrams illustrating a configuration and a structure of a brake valve provided in a brake device of a vehicle, wherein FIG. 6A is a plan view of the brake valve, and FIG. It is.

FIG. 7 is a graph showing a relationship between a cam lift amount and an air pressure with respect to a rotation angle of a brake valve cam shaft of a brake valve.

FIG. 8 is a graph showing the relationship between the rotation angle of a brake valve camshaft of a brake valve and the opening and closing of electrical contacts.

[Explanation of symbols]

 4 Drive motor 23 Leakage check exhaust port (detection circuit) 31-35 Pressure sensor 49 Brake valve 50 Brake valve body 51 Brake valve handle (Handle) 54 Brake valve camshaft (Camshaft) 60 Automated test equipment main body (Brake valve automatic Test device) 62 Detector 70 Control panel (automatic brake valve tester) 71 Control unit 72 Data processing unit

Claims (3)

[Claims] 1. A brake which is provided in a brake device of a vehicle or the like and outputs a pressure necessary for braking according to a rotation angle of the camshaft and outputs an electric signal by rotating a camshaft of a brake valve body. An automatic brake valve testing apparatus for testing a valve, wherein the drive motor is engaged with the camshaft to rotate the camshaft, and is output according to a rotation angle of the camshaft rotated by the drive motor. A pressure sensor that measures pressure, a detection unit that detects opening and closing of an electrical contact that is opened and closed according to a rotation angle of the camshaft that is rotated by the drive motor, and a control unit that controls driving of the drive motor. Data for obtaining, as test results, output pressure of a brake valve and opening / closing state of an electrical contact according to a rotation angle of the camshaft based on signals from the pressure sensor and the detection unit. Brake valve automatic test apparatus characterized by comprising a processing section. 2. A contact point where a handle attached to the camshaft abuts a stopper provided on a brake valve body to restrict rotation of the camshaft as a reference point, and a rotation regulating side from the reference point. 2. The automatic brake valve test apparatus according to claim 1, wherein the test is performed in such a manner that the output pressure and the open / close state of the electrical contact are tested according to the rotation angle from the reference point. 3. The automatic brake valve test apparatus according to claim 1, further comprising a detection circuit for detecting leakage of the brake valve.