A testing device for a wind pressure adjuster

Abstract

The present invention discloses a test device for a wind pressure adjuster, which includes a first connector; the air inlet of the first connector is connected to the air outlet of an external air source; the air outlet of the first connector is connected to the air inlet of an air inlet ball valve; the air outlet of the air inlet ball valve is connected to the air inlet of a filter; the air outlet of the filter is connected to the air inlet of a pressure regulating valve; a first air path and a second air path are arranged in a passage board; the air outlet of the pressure regulating valve is connected to the first air path inlet of the first air path and the second air path inlet of the second air path; the first air path outlet and the second air path outlet are both connected to the air inlet of an air outlet ball valve; the air outlet of the air outlet ball valve is connected to the air inlet of a second connector; three pressure switch mounting holes are respectively arranged on the first air path and the second air path; a pressure gauge is arranged on the connecting pipeline between the air outlet of the pressure regulating valve and the first air path inlet and the second air path inlet. The present invention can conveniently and reliably inspect the three-stage pressure switch of the wind pressure adjuster, significantly shorten the inspection time, and improve the inspection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of testing, and particularly to a testing device for a wind pressure adjuster. Background Art

[0002] A non-gravity type vehicle retarder is a non-gravity type vehicle retarder that uses compressed air as a power source and adjusts the speed of different vehicles in stages with the help of a control device. It is one of the main speed control devices for adjusting the speed of shunting cars in a railway hump marshalling yard.

[0003] Among them, the wind pressure adjuster is a main component of the control device of the non-gravity type vehicle retarder. The wind pressure adjuster is used to control the pressure value of the compressed air in the retarder cylinder to achieve different braking levels.

[0004] The wind pressure adjuster uses a pressure switch as an element for controlling the wind pressure level and an electro-pneumatic valve (i.e., an electromagnetic air valve) as a pneumatic control valve. The wind pressure adjuster has a total of three levels of pressure switches, and each level of pressure switch includes two pressure switches, namely a normally open pressure switch and a normally closed pressure switch, which are respectively used to execute two working modes of normally open and normally closed. By using the on-off of the normally closed and normally open pressure switches, the control circuit is connected or disconnected, thereby controlling the pressure value of the compressed air entering the cylinder. For example, the first-level pressure switch includes two pressure switches, namely a first-level normally open pressure switch and a first-level normally closed pressure switch.

[0005] Table 1: Schematic Table of Wind Pressure Levels of Commonly Used Pressure Switches

[0006]

[0007] As shown in Table 1, for the wind pressure adjuster, for example, the normally open pressure value of the first-level normally open pressure switch is 0.27 Mpa. This pressure switch is normally open. When 0.27 Mpa of atmospheric pressure is applied to the pressure switch, the pressure switch changes from open to closed, thereby connecting the air circuit where the pressure switch is located.

[0008] Another example is that the first-level normally closed pressure switch is 0.17 Mpa. This pressure switch is normally closed. When 0.17 Mpa of atmospheric pressure is applied to the pressure switch, the pressure switch changes from closed to open, thereby disconnecting the air circuit where the pressure switch is located.

[0009] At present, for the incoming inspection of pressure switches, only individual inspections can be carried out one by one. If the quantity of incoming pressure switches is large, then the incoming inspection of pressure switches will be a very heavy task. In view of the fact that before the air pressure regulator is shipped, it is necessary to calibrate all three-stage pressure switches so that they are in the set position (that is, the set value of the pressure switch is the required normally open pressure value or normally closed pressure value). Therefore, for the calibration of one air pressure regulator, at least three times are required. If the quantity of air pressure regulators is large, the outgoing inspection of air pressure regulators will also be an extremely heavy task, which requires a large amount of inspection time and increases the inspection cost.

[0010] In addition, when the air pressure regulator is in use on site, the set value of the pressure switch (such as the normally open pressure value or normally closed pressure value) is prone to deviation, and it is necessary to regularly overhaul the air pressure regulator. The on-site overhaul of the air pressure regulator is relatively difficult. It is necessary to remove the air pressure regulator and move it back to the overhaul workshop for overhaul, which brings inconvenience to the user and increases the daily equipment maintenance cost.

[0011] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the Invention

[0012] The purpose of the present invention is to provide a testing device for an air pressure regulator in view of the technical defects existing in the prior art.

[0013] To this end, the present invention provides a testing device for an air pressure regulator, including an air circuit device;

[0014] The air circuit device includes: a first connector, an inlet ball valve, a filter, a pressure regulating valve, a pressure gauge, a passage board, an outlet ball valve and a second connector;

[0015] The air inlet at one end of the first connector is connected to the air outlet of an external air source;

[0016] The air outlet at the other end of the first connector is connected to the air inlet of the inlet ball valve;

[0017] The air outlet of the inlet ball valve is connected to the air inlet of the filter;

[0018] The air outlet of the filter is connected to the air inlet of the pressure regulating valve;

[0019] Inside the passage board, a hollow first air path and a second air path are provided;

[0020] The air outlet of the pressure regulating valve is connected to the first air path inlet at one end of the first air path and the second air path inlet at one end of the second air path;

[0021] The first air path outlet at the other end of the first air path and the second air path outlet at the other end of the second air path are both connected to the air inlet of the outlet ball valve;

[0022] The air outlet of the balloon valve is connected to the air inlet of the second joint;

[0023] Among them, three pressure switch mounting holes are respectively arranged on the first air path and the second air path;

[0024] Among them, a pressure gauge is arranged on the connecting pipeline between the air outlet of the pressure regulating valve and the first air path inlet of the first air path and the second air path inlet of the second air path.

[0025] As can be seen from the technical solutions provided by the present invention above, compared with the prior art, the present invention provides a test device for a wind pressure regulator, which is scientifically designed and can conveniently and reliably inspect the three-stage pressure switches (a total of 6) in the wind pressure regulator, significantly shortening the inspection time of the pressure switches, improving the inspection efficiency, and reducing the inspection cost.

[0026] By applying the present invention, the inspection work of the wind pressure regulator can be made convenient and simple, and the workload can be reduced. The incoming inspection of the parts (pressure switches) of the wind pressure regulator by the present invention: the three-stage pressure switches (6) can be inspected at one time, greatly shortening the inspection time of the pressure switches.

[0027] By applying the present invention, when the wind pressure regulator is inspected as a whole, only the assembled wind pressure regulator needs to be connected to the test device of the wind pressure regulator of the present invention through an air duct, and the inspection of one wind pressure regulator can be completed at one time.

[0028] Through inspection and verification, the present invention can be reliably applied to the test of the wind pressure regulator in the non-gravity vehicle retarder control device used in railway hump marshalling yards. Brief Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the air path device included in a test device for a wind pressure regulator provided by the present invention;

[0030] Figure 2 It is an electrical schematic diagram of the circuit device included in a test device for a wind pressure regulator provided by the present invention;

[0031] Figure 3 It is a schematic structural diagram of the through-board in a test device for a wind pressure regulator provided by the present invention;

[0032] Figure 4 It is a schematic front appearance structure diagram of an embodiment of a test device for a wind pressure regulator provided by the present invention;

[0033] Figure 5 It is a schematic back appearance structure diagram of an embodiment of a test device for a wind pressure regulator provided by the present invention;

[0034] In the figure, 1 - quick-connect fitting; 2 - inlet air valve; 3 - filter; 4 - pressure regulating valve; 5 - pressure gauge;

[0035] 6 - passage board; 7 - outlet air valve; 8 - second fitting;

[0036] 107 - switching power supply; 108 - power plug; 9 - circuit breaker; 10 - power switch;

[0037] 11 - pluggable terminal; 12 - indicator light; 13 - device housing; 14 - drawer; 15 - handle;

[0038] 16 - floor feet. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0041] In the description of this patent, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific situations.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0043] SeeFigures 1 to 5 , the present invention provides a test device for a wind pressure regulator, including a gas circuit device;

[0044] The gas circuit device includes: a first connector 1, an inlet ball valve 2, a filter 3, a pressure regulating valve 4, a pressure gauge 5, a passage board 6, an outlet ball valve 7 and a second connector 8;

[0045] The air inlet at one end of the first connector 1 is connected to the air outlet of an external air source (such as an air compressor);

[0046] The air outlet at the other end of the first connector 1 is connected to the air inlet of the inlet ball valve 2;

[0047] The air outlet of the inlet ball valve 2 is connected to the air inlet of the filter 3;

[0048] The air outlet of the filter 3 is connected to the air inlet of the pressure regulating valve 4;

[0049] Inside the passage board 6, a hollow first gas path 61 and a second gas path 62 are provided;

[0050] The air outlet of the pressure regulating valve 4 is connected to the first gas path inlet 611 at one end of the first gas path 61 and the second gas path inlet 621 at one end of the second gas path 62;

[0051] The first gas path outlet 612 at the other end of the first gas path 61 and the second gas path outlet 622 at the other end of the second gas path 62 are both connected to the air inlet of the outlet ball valve 7;

[0052] The air outlet of the outlet ball valve 7 is connected to the air inlet of the second connector 8;

[0053] Among them, three pressure switch mounting holes 63 are respectively provided on the first gas path 61 and the second gas path 62;

[0054] Among them, a pressure gauge 5 is provided on the connecting pipeline between the air outlet of the pressure regulating valve 4 and the first gas path inlet 611 of the first gas path 61 and the second gas path inlet 621 of the second gas path 62.

[0055] It should be noted that in actual implementation, the first gas path 61 and the second gas path 62 can be interconnected or not, which has no impact on actual use.

[0056] In the present invention, in actual implementation, both the first connector 1 and the second connector 8 are quick-release connectors.

[0057] It should be noted that in the present invention, through the first connector 1, it is convenient for disassembly and assembly with the external air source. The air inlet of the first connector 1 can be directly connected to the external air source, and the air outlet is connected to the air inlet of the inlet ball valve 2.

[0058] The function of the air inlet valve 2 is to control the on / off of the air source. The outlet of the air inlet valve is connected to the filter 3. The air outlet of the filter 3 is connected to the air inlet of the pressure regulating valve 4.

[0059] The function of the pressure regulating valve 4 is to adjust the magnitude of the pressure value to meet the opening and closing values of each pressure switch. The air outlet of the pressure regulating valve 4 is respectively connected to the air inlet of the pressure gauge 5 and the air inlet of the passage board 6 (specifically including the first air passage inlet 611 of the first air passage 61 and the second air passage inlet 621 of the second air passage 62).

[0060] The function of the pressure gauge 5 is to display the pressure value of each pressure switch.

[0061] In the present invention, two air passages, namely the first air passage 61 and the second air passage 62, are provided on the passage board 6. There are three pressure switch mounting holes 63 on each air passage, which are respectively used for the installation and testing of three normally open and normally closed pressure switches (a total of 6 pressure switches).

[0062] The air outlet of the passage board 6 (specifically including the first air passage outlet 612 of the first air passage 61 and the second air passage outlet 622 of the second air passage 62) is connected to the air inlet of the air outlet valve 7.

[0063] The air outlet valve 7 is mainly used for the on / off of the air source. When the device of the present invention is used to measure the three - stage pressure value of the pressure switch (i.e., working mode one), the air outlet of the air outlet valve 7 can be closed. While when measuring the three - stage pressure value of the whole air pressure regulator (i.e., working mode two), the air outlet of the air outlet valve 7 is opened and connected to the air inlet of the air pressure regulator.

[0064] The air outlet of the air outlet valve 7 is used to be connected to the air inlet of the second connector 8.

[0065] The air outlet of the second connector 8 is used to be connected to the air inlet of the air pressure regulator.

[0066] In the present invention, specifically, the pressure gauge 5 is a digital display pressure gauge.

[0067] It should be noted that for the present invention, in order to adjust the pressure values in the two air passages at any time and facilitate observation, the gas coming out of the filter 3 enters the pressure regulating valve 4 and the pressure gauge 5 again. Among them, in order to accurately represent the pressure value after each pressure regulation, the pressure gauge 5 is selected as a digital display pressure gauge;

[0068] In the present invention, specifically, for the test device of the air pressure regulator provided by the present invention, it includes the following working modes:

[0069] 1. Working mode 1: When the test device is used to test multiple pressure switches not installed on the air pressure regulator, the pressure switch mounting holes 63 on the first air path 61 and the second air path 62 are respectively used to install the first-stage normally open pressure switch, the second-stage normally open pressure switch, the third-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch; at this time, the air outlet ball valve 7 is in the closed state (i.e., no air is discharged); the six pressure switch mounting holes 63 are connected to the air inlets of the six pressure switches.

[0070] Among them, the multiple pressure switches specifically include the first-stage normally open pressure switch, the second-stage normally open pressure switch, and the third-stage normally open pressure switch, as well as the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch.

[0071] Specifically, the normally open pressure values of the first-stage normally open pressure switch, the second-stage normally open pressure switch, and the third-stage normally open pressure switch increase in sequence.

[0072] The normally closed pressure values of the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch increase in sequence.

[0073] Specifically, the normally open pressure value of the first-stage normally open pressure switch is greater than the normally closed pressure value of the first-stage normally closed pressure switch.

[0074] The normally open pressure value of the second-stage normally open pressure switch is greater than the normally closed pressure value of the second-stage normally closed pressure switch.

[0075] The normally open pressure value of the third-stage normally open pressure switch is greater than the normally closed pressure value of the third-stage normally closed pressure switch.

[0076] It should be noted that for Working mode 1 of the present invention, the external air source is connected to the air inlet ball valve 2 through the first joint 1. The external air source is filtered and purified by the filter 3, and then reaches the two air paths on the passage board 6 through the pressure regulating valve 4 and the pressure gauge 5 (which can be divided into a normally open air path and a normally closed air path. For example, the first air path 61 is used as the normally open air path for the first-stage normally open pressure switch, the second-stage normally open pressure switch, and the third-stage normally open pressure switch, and the second air path 62 is used as the normally closed air path for installing the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch), and then enters the normally open pressure switch and the normally closed pressure switch to be tested.

[0077] Therefore, through the above Working mode 1, multiple pressure switches can be individually inspected without actually being installed on the air pressure regulator.

[0078] Through the above working mode 1, the present invention can test multiple pressure switches at one time. Multiple installation positions of pressure switches are set in two air paths, that is, three pressure switch mounting holes 63 are respectively provided on the first air path 61 and the second air path 62, thus facilitating the installation of multiple pressure switches.

[0079] 2. Working mode 2: When the testing device is used to test the overall air pressure regulator with multiple pressure switches installed, all the pressure switch mounting holes 63 on the first air path 61 and the second air path 62 are blocked (for example, sealed by a plug or other means), and the air outlet ball valve 7 is in the open state (that is, it can discharge air). The air outlet of the second joint 8 is connected to the air inlet of the air pressure regulator.

[0080] Among them, the multiple pressure switches specifically include a first-stage normally open pressure switch, a second-stage normally open pressure switch, and a third-stage normally open pressure switch, as well as a first-stage normally closed pressure switch, a second-stage normally closed pressure switch, and a third-stage normally closed pressure switch.

[0081] It should be noted that for the working mode 2 of the present invention, an external air source is connected to the air inlet ball valve 2 through the first joint 1. The external air source is filtered and purified by the filter 3, and then successively passes through the pressure regulating valve 4, the pressure gauge 5, the passage board 6, the air outlet ball valve 7, and the second joint 8, and finally leads to the internal air path of the air pressure regulator (that is, leads to the original three-stage pressure switches inside the air pressure regulator, a total of 3 normally open pressure switches and 3 normally closed pressure switches).

[0082] Through the above working mode 2, when the present invention needs to test the overall air pressure regulator, only the position of the pressure switch on the above passage board needs to be blocked, and then the air outlet ball valve 7 is connected to the air inlet of the air pressure regulator through the second joint 8.

[0083] Therefore, through the above working mode 2, the overall air pressure regulator can be tested.

[0084] In the present invention, the testing device for the air pressure regulator provided by the present invention further includes a circuit device.

[0085] The circuit device includes: a switching power supply GS and a circuit breaker QF.

[0086] The live wire end L and the neutral wire end N of the switching power supply GS are respectively connected to the live wire end L and the neutral wire end N of the external AC power supply AC through a circuit breaker QF.

[0087] Among them, the positive output terminal +V of the switching power supply GS is connected to one end of the power switch QA1.

[0088] The other end of the power switch QA1 is respectively connected to one end of the pressure switch action display lights DY1, DY2, and DY3.

[0089] The other end of the pressure switch action display lamp DY1 is respectively connected to the terminal blocks X1 and X2 and the pin 1 on the aviation plug HCT;

[0090] The other end of the pressure switch action display lamp DY2 is respectively connected to the terminal blocks X3 and X4 and the pin 2 on the aviation plug HCT;

[0091] The other end of the pressure switch action display lamp DY3 is respectively connected to the terminal blocks X5 and X6 and the pin 3 on the aviation plug HCT;

[0092] Among them, the negative output terminal -V of the switching power supply GS is respectively connected to the terminal block X7 and the pin 4 on the aviation plug HCT.

[0093] In the present invention, specifically, the external AC power supply AC is a 220V AC power supply.

[0094] In the present invention, specifically, the live wire end L and the neutral wire end N of the switching power supply GS are respectively connected to the terminal 2 and the terminal 4 on one side of the circuit breaker QF;

[0095] The terminal 1 and the terminal 3 on the other side of the circuit breaker QF are connected to the live wire end L and the neutral wire end N of a power plug;

[0096] The ground wire end of the power plug (three-phase power plug) is grounded;

[0097] The power plug is used to connect to the external AC power supply AC.

[0098] In the present invention, specifically, the switching power supply GS is a 24V switching power supply.

[0099] In the present invention, specifically, the other end of the power switch QA1 is connected to the negative output terminal -V of the switching power supply GS through the indicator lamp QA2.

[0100] It should be noted that in the present invention, the function of the switching power supply GS: is used to convert the externally input AC 220V power supply into a 24V DC power supply for the use of the subsequent circuit.

[0101] The function of the circuit breaker QF: is used to cut off the power supply and protect the circuit when a line fault occurs;

[0102] The function of the power switch QA1: is used to control the on-off of the circuit and is displayed through the indicator lamp QA2.

[0103] In the present invention, the functions of the pressure switch action display lights DY1, DY2, and DY3 are as follows: they are respectively used to display the on / off states of pressure switches of different wind pressure levels. Among them, the lighting and extinguishing of the light of DY1 are used to display the on / off states of the first-stage pressure switches (including the first-stage normally open pressure switch and the first-stage normally closed pressure switch), the lighting and extinguishing of the light of DY2 display the on / off states of the second-stage pressure switches (including the second-stage normally open pressure switch and the second-stage normally closed pressure switch), and the lighting and extinguishing of the light of DY3 are used to display the on / off states of the third-stage pressure switches (including the third-stage normally open pressure switch and the third-stage normally closed pressure switch).

[0104] In the present invention, the function of the terminal is as follows: when the test device of the present invention is in working mode 1 (i.e., the test device is used to test multiple pressure switches that are not installed on the wind pressure adjuster), it is used to connect the lead-out wires of different pressure switches;

[0105] Specifically, when the test device of the present invention is in working mode 1 (i.e., when the test device is used to test multiple pressure switches that are not installed on the wind pressure adjuster), the terminals X1 and X2 are used to respectively connect the positive lead-out wires of the first-stage pressure switches (specifically including the first-stage normally open pressure switch and the first-stage normally closed pressure switch);

[0106] The terminals X3 / X4 are respectively connected to the positive lead-out wires of the second-stage pressure switches (specifically including the second-stage normally open pressure switch and the second-stage normally closed pressure switch);

[0107] The terminals X5 / X6 are respectively connected to the positive lead-out wires of the third-stage pressure switches (specifically including the third-stage normally open pressure switch and the third-stage normally closed pressure switch);

[0108] The terminal X7 is the common negative terminal of the pressure switches. When the test device of the present invention is in working mode 1 (i.e., the test device is used to test multiple pressure switches that are not installed on the wind pressure adjuster), it is used to simultaneously connect the negative lead-out wires of six pressure switches (including the first-stage normally open pressure switch, the second-stage normally open pressure switch, the third-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch).

[0109] Specifically, each terminal comes with an alligator clip, which is convenient for connecting to the lead-out wire (positive lead-out wire or negative lead-out wire) of the pressure switch.

[0110] In the present invention, when the test device of the present invention is in working mode 2 (i.e., the test device is used to test the overall wind pressure adjuster with multiple pressure switches installed), the pins 1, 2, 3, and 4 on the aviation plug HCT are respectively connected to one end of the alligator clip sleeves HCZ-1 / X01, HCZ-2 / X02, HCZ-3 / X03, and HCZ-4 / X04 (four alligator clip sleeves);

[0111] The other ends of the alligator clip sleeves HCZ-1 / X01, HCZ-2 / X02, and HCZ-3 / X03 are respectively connected to the positive terminals of the first-stage pressure switches (including the first-stage normally open pressure switch and the first-stage normally closed pressure switch), the second-stage pressure switches (including the second-stage normally open pressure switch and the second-stage normally closed pressure switch), and the third-stage pressure switches (including the third-stage normally open pressure switch and the third-stage normally closed pressure switch) that come with the air pressure regulator;

[0112] The alligator clip sleeve HCZ-4 / X04 is connected to the common negative terminal of all six pressure switches (i.e., the first-stage normally open pressure switch, the second-stage normally open pressure switch, the third-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch) that come with the air pressure regulator. It should be noted that this common negative terminal is connected to the negative terminals of the six pressure switches simultaneously.

[0113] It should be noted that in the present invention, the function of the aviation plug HCT: when the test device in the present invention is in working mode two (the test device is used to test the overall air pressure regulator), it is used to connect the lead-out wire of the air pressure regulator;

[0114] Among them, the alligator clip sleeve HCZ-1 / X01 is used to connect the positive lead-out wires of the first-stage normally open pressure switch and the first-stage normally closed pressure switch that come with the air pressure regulator;

[0115] The alligator clip sleeve HCZ-2 / X02 is used to connect the positive lead-out wires of the second-stage normally open pressure switch and the second-stage normally closed pressure switch that come with the air pressure regulator;

[0116] The alligator clip sleeve HCZ-3 / X03 is used to connect the positive lead-out wires of the third-stage normally open pressure switch and the third-stage normally closed pressure switch that come with the air pressure regulator;

[0117] The alligator clip sleeve HCZ-4 / X04 is used to connect the common negative pole of all the pressure switches on the air pressure regulator. It should be noted that this common negative terminal is connected to the negative terminals of the six pressure switches simultaneously.

[0118] Specifically, the air pressure regulator is a well-known device with mature prior art. For example, it can be the air pressure regulator of model T.TF3 produced by Tianjin Railway Signal Co., Ltd., which is used to control the pressure value of the compressed air in the cylinder of the step-by-step braking retarder to achieve different braking levels.

[0119] It should be noted that for the pressure switch, a mechanical spring piece is arranged inside it. When the air pressure reaches the preset value, the mechanical spring piece is connected or disconnected, so that the positive pole and the negative pole on the pressure switch are connected or disconnected to form a circuit.

[0120] In terms of specific implementation, for a pressure switch, it operates (to achieve connection or disconnection) by air pressure pushing a mechanical elastic piece. The pressure switch is a well-known component with mature existing technology. For example, it can be a PS31 pressure switch of the Gomez brand.

[0121] In the present invention, in terms of specific implementation, the test device for the air pressure regulator provided by the present invention includes a hollow device housing 13;

[0122] On the front of the device housing 13, a pressure regulating valve 4 and a pressure gauge 5 are provided;

[0123] On the front of the device housing 13, a plurality of pluggable terminal blocks 11 and a plurality of indicator lights 12 are also provided;

[0124] On the front of the device housing 13, a power switch (QA1) 10 is provided;

[0125] On the back of the device housing 13, a passage board 6, a filter 3, and a switching power supply (GS) 107 are provided;

[0126] In terms of specific implementation, the pluggable terminal block 11 specifically includes terminal blocks X1 to X7.

[0127] The plurality of indicator lights 12 include pressure switch operation indicator lights DY1, DY2, and DY3;

[0128] In terms of specific implementation, on the device housing 13, a power plug 108 and a circuit breaker (QF) 9 are provided;

[0129] In terms of specific implementation, on the top of the device housing 13, a handle 15 is provided;

[0130] At the four corner positions of the bottom of the device housing 13, a floor leg 16 is respectively provided;

[0131] At the lower part of the device housing 13, a pull-out drawer 14 is provided.

[0132] In terms of specific implementation, on the left side of the device housing 13, an inlet air valve 2 is provided;

[0133] On the right side of the device housing 13, an outlet air valve 7 is provided;

[0134] The inlet air valve 2 is connected to the first joint 1;

[0135] The outlet air valve 7 is connected to the second joint 8.

[0136] In specific implementation, the device housing 13 is a sheet metal part, which is the base of the test bench and is also equipped with drawers for placing tools. For the convenience of observation and operation, the panel of the device housing 13 is placed obliquely, and installation holes for components such as a power switch, indicator lights, terminal posts, pressure regulating valves, and pressure gauges need to be left on the panel; air inlet holes and air outlet holes also need to be left on the side plates.

[0137] In specific implementation, on the front of the device housing 13, six pressure switch mounting holes 63 are provided, which are respectively used to dock the above six pressure switches.

[0138] In specific implementation, for the convenience of carrying the test device of the present invention, a handle is installed on the top of the device housing 13, and four support feet are provided at the bottom.

[0139] In the present invention, in specific implementation, all six pressure switch mounting holes 63 are threaded holes. One end (i.e., the connection end) of six pressure switches such as a first-stage normally open pressure switch, a second-stage normally open pressure switch, a third-stage normally open pressure switch, a first-stage normally closed pressure switch, a second-stage normally closed pressure switch, and a third-stage normally closed pressure switch has an external thread, and the pressure switches are installed on the pressure switch mounting holes 63 of the circuit board 6 of the device housing 13 by threaded connection.

[0140] To more clearly understand the technical solution of the present invention, the working principle of the present invention will be described below.

[0141] 1. Considering the safety of the operator: A 24V DC power supply is adopted, and a power plug, a circuit breaker, and a 24V DC power supply are introduced to convert the external AC 220V into a 24V DC power supply. When a circuit fault occurs, the circuit breaker cuts off the power to protect the circuit; in the circuit layout, when the pressure switch is ventilated to reach the corresponding value, the pressure switch emits a closed or open electrical signal, making the circuit form a complete loop, which is shown by the on and off of the display lamp DY.

[0142] 2. Considering the convenience of operation: A power switch QA1 with a lamp display is set on the panel, which can clearly reflect whether the circuit is powered on;

[0143] A display lamp is set for each stage of pressure switch (specifically including pressure switch action display lamps DY1, DY2, and DY3). When the pressure switch is turned on, the lamp is on; when the pressure switch is turned off, the lamp is off;

[0144] 3. When in working mode 1, that is, when used for individual inspection of the pressure switch, the wiring of the circuit components is placed inside the device housing, while the pressure switch is installed on the panel (outside the device housing). In order to connect the lead-out wire of the pressure switch to the electrical components inside the housing, terminal posts 11 and alligator clips with plug-in parts are introduced.

[0145] 4. When in working mode 2 and conducting an overall inspection of the air pressure regulator, four wires (one common negative wire and three positive wires) are led out from the housing sheet metal part using an aviation plug and connected to the positive poles and the common negative terminal of each stage of the pressure switch on the air pressure regulator respectively.

[0146] To better understand the technical solution of the present invention, the following describes the technical solution of the present invention in conjunction with specific embodiments.

[0147] 1. When the test device of the present invention needs to test six pressure switches simultaneously, first, install the six pressure switches at the corresponding positions on the panel of the device housing according to their characteristics (first-stage normally open, first-stage normally closed, second-stage normally open, second-stage normally closed, third-stage normally open, third-stage normally closed). The black wire (i.e., the lead wire of the common negative terminal) of each pressure switch is connected to the common negative terminal wiring post (i.e., wiring post X7), and the other lead wire of the pressure switch (i.e., the positive pole lead wire) is connected to the corresponding wiring post (for example: the other wire of the second-stage normally open pressure switch is connected to the second-stage normally open wiring post, and the second-stage normally open wiring post is wiring post X3 or X4);

[0148] Close the power switch QA1. The three pressure switch action indicator lights DY1, DY2, and DY3 all light up. Open the pressure gauge 5 and the inlet balloon valve 7, and adjust the pressure regulating valve 4 from small to large. When the first-stage indicator light (i.e., the pressure switch action indicator light DY1) goes out, observe whether the displayed value on the pressure gauge 5 is the set value (0.17 Mpa) of the first-stage normally closed pressure switch. If not, adjust the first-stage normally closed pressure switch to make it conform to the set value.

[0149] Continue to adjust the pressure regulating valve 4. When the first-stage indicator light (i.e., the pressure switch action indicator light DY1) lights up, observe whether the displayed value on the pressure gauge 5 is within the set value (0.27 Mpa) of the first-stage normally open pressure switch. If not, adjust the first-stage normally open pressure switch to make it conform to the set value.

[0150] According to the above method, continue to adjust the pressure regulating valve 4, observe the on and off of the second-stage indicator light (i.e., the pressure switch action indicator light DY2) to test the second-stage normally closed pressure switch and the second-stage normally open pressure switch, and observe the on and off of the third-stage indicator light (i.e., the pressure switch action indicator light DY3) to test the third-stage normally closed pressure switch and the third-stage normally open pressure switch.

[0151] 2. When the test device of the present invention needs to conduct an overall inspection of the six pressure switches on the overall air pressure regulator with six pressure switches already installed, the three normally open pressure switches and the three normally closed pressure switches need to be tested separately:

[0152] 1. When testing three normally open pressure switches (including the first-level normally open pressure switch, the second-level normally open pressure switch, and the third-level normally open pressure switch): 4 alligator clips are led out from the aviation plug HCT, and the alligator clip sleeves HCZ-1 / X01, HCZ-2 / X02, and HCZ-3 / X03 are respectively connected to the positive terminals of the first-level pressure switch (including the first-level normally open pressure switch and the first-level normally closed pressure switch), the second-level pressure switch (including the second-level normally open pressure switch and the second-level normally closed pressure switch), and the third-level pressure switch (including the third-level normally open pressure switch and the third-level normally closed pressure switch);

[0153] The alligator clip sleeve HCZ-4 / X04 is connected to the common negative terminal of the three normally open pressure switches (including the first-level normally open pressure switch, the second-level normally open pressure switch, and the third-level normally open pressure switch). Turn on the power switch, and the three display lights (i.e., the pressure switch action display lights DY1, DY2, and DY3) are all turned off. Open the pressure gauge 5, the inlet balloon valve 2, and the outlet balloon valve 7, and rotate the pressure regulating valve 4 from small to large; it should be noted that this common negative terminal is connected to the negative terminals of the three normally open pressure switches at the same time.

[0154] When the first-level display light (i.e., the pressure switch action display light DY1) is on, observe whether the displayed value of the pressure gauge 5 is within the set value (0.27 Mpa ± 0.02) of the first-level normally open pressure switch. If not, adjust the first-level normally open pressure switch to make it conform to the set value.

[0155] According to the above method, continue to adjust the pressure regulating valve 4. When the second-level display light (i.e., the pressure switch action display light DY2) is on, check the second-level normally open pressure switch, and when the third-level display light (i.e., the pressure switch action display light DY3) is on, check the third-level normally open pressure switch.

[0156] 2. When testing three normally closed pressure switches (including the first-level normally closed pressure switch, the second-level normally closed pressure switch, and the third-level normally closed pressure switch), the alligator clip sleeve HCZ-4 / X04 is connected to the common negative terminal of the three normally closed pressure switches (including the first-level normally closed pressure switch, the second-level normally closed pressure switch, and the third-level normally closed pressure switch). It should be noted that this common negative terminal is connected to the negative terminals of the three normally closed pressure switches at the same time.

[0157] The alligator clip sleeves HCZ-1 / X01, HCZ-2 / X02, and HCZ-3 / X03 are respectively connected to the positive terminals of the first-level pressure switch (including the first-level normally open pressure switch and the first-level normally closed pressure switch), the second-level pressure switch (including the second-level normally open pressure switch and the second-level normally closed pressure switch), and the third-level pressure switch (including the third-level normally open pressure switch and the third-level normally closed pressure switch), that is, the connection method of the remaining alligator clips is the same as that during the test of the normally open pressure switch.

[0158] Close the power switch, and all three display lights (i.e., the pressure switch action display lights DY1, DY2, and DY3) will light up. Open the pressure gauge 5, the inlet balloon valve 2, and the outlet balloon valve 7, and rotate the pressure regulating valve 4 from large to small;

[0159] When the third-level display light (i.e., the pressure switch action display light DY3) goes out, observe whether the displayed value on the pressure gauge 5 is at the set value (0.43 Mpa ± 0.03) of the third-level normally closed pressure switch. If not, adjust the third-level normally closed pressure switch to make it conform to the set value.

[0160] According to the above method, sequentially inspect the second-level normally closed pressure switch and the first-level normally closed pressure switch.

[0161] In summary, compared with the prior art, a test device for a wind pressure regulator provided by the present invention is scientifically designed and can conveniently and reliably inspect the three-level pressure switches (a total of 6) in the wind pressure regulator, significantly shortening the inspection time of the pressure switches, improving the inspection efficiency, and reducing the inspection cost.

[0162] By applying the present invention, the inspection work of the wind pressure regulator can be made convenient and simple, reducing the workload. The incoming inspection of the parts (pressure switches) of the wind pressure regulator by the present invention: the three-level pressure switches (6) can be inspected at one time, greatly shortening the inspection time of the pressure switches.

[0163] By applying the present invention, when inspecting the wind pressure regulator as a whole, only need to connect the assembled wind pressure regulator to the test device of the wind pressure regulator of the present invention through an air duct, and the inspection of one wind pressure regulator can be completed at one time.

[0164] Through inspection and verification, the present invention can be reliably applied to the test of the wind pressure regulator in the non-gravity vehicle retarder control device used in railway hump marshalling yards.

[0165] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A testing device for a wind pressure regulator, characterized in that, it includes an air circuit device and an electric circuit device; The air circuit device includes: a first connector (1), an inlet air valve (2), a filter (3), a pressure regulating valve (4), a pressure gauge (5), a passage board (6), an outlet air valve (7) and a second connector (8); One end of the inlet of the first connector (1) is connected to the outlet of an external air source; The other end of the outlet of the first connector (1) is connected to the inlet of the inlet air valve (2); The outlet of the inlet air valve (2) is connected to the inlet of the filter (3); The outlet of the filter (3) is connected to the inlet of the pressure regulating valve (4); A hollow first air circuit (61) and a second air circuit (62) are arranged inside the passage board (6); The outlet of the pressure regulating valve (4) is connected to the first air circuit inlet (611) at one end of the first air circuit (61) and the second air circuit inlet (621) at one end of the second air circuit (62); The first air circuit outlet (612) at the other end of the first air circuit (61) and the second air circuit outlet (622) at the other end of the second air circuit (62) are both connected to the inlet of the outlet air valve (7); The outlet of the outlet air valve (7) is connected to the inlet of the second connector (8); Wherein, three pressure switch mounting holes (63) are respectively arranged on the first air circuit (61) and the second air circuit (62); Wherein, a pressure gauge (5) is arranged on the connecting pipeline between the outlet of the pressure regulating valve (4) and the first air circuit inlet (611) of the first air circuit (61) and the second air circuit inlet (621) of the second air circuit (62); The electric circuit device includes a switching power supply GS and a circuit breaker QF; The live wire terminal L and the neutral wire terminal N of the switching power supply GS are respectively connected to the live wire terminal L and the neutral wire terminal N of an external AC power supply AC through a circuit breaker QF; Wherein, the positive output terminal +V of the switching power supply GS is connected to one end of a power switch QA1; The other end of the power switch QA1 is respectively connected to one ends of pressure switch action display lights DY1, DY2 and DY3; The other end of the pressure switch action display light DY1 is respectively connected to a terminal block X1 and X2 and a pin 1 on an aviation plug HCT; The other end of the pressure switch action display light DY2 is respectively connected to a terminal block X3 and X4 and a pin 2 on an aviation plug HCT; The other end of the pressure switch action display light DY3 is respectively connected to a terminal block X5 and X6 and a pin 3 on an aviation plug HCT; The negative output terminal -V of the switching power supply GS is respectively connected to a terminal block X7 and a pin 4 on an aviation plug HCT; The live wire terminal L and the neutral wire terminal N of the switching power supply GS are respectively connected to a terminal 2 and a terminal 4 on one side of the circuit breaker QF; The terminal 1 and the terminal 3 on the other side of the circuit breaker QF are connected to the live wire terminal L and the neutral wire terminal N of a power plug; The ground wire terminal of the power plug is grounded; The power plug is used to connect to an external AC power supply AC; The other end of the power switch QA1 is connected to the negative output terminal -V of the switching power supply GS through an indicator light QA2.

2. The testing device for a wind pressure regulator according to claim 1, characterized in that, it includes the following working modes: Working mode 1: When the testing device is used to test multiple pressure switches not installed on the air pressure regulator, the pressure switch mounting holes (63) on the first air circuit (61) and the second air circuit (62) are respectively used to install the first-stage normally open pressure switch, the second-stage normally open pressure switch, the third-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch; At this time, the air outlet valve (7) is in the closed state; Among them, the multiple pressure switches include the first-stage normally open pressure switch, the second-stage normally open pressure switch, and the third-stage normally open pressure switch, as well as the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch.

3. The testing device for the air pressure regulator according to claim 1, characterized in that, it includes the following working modes: Working mode 2: When the testing device is used to test the entire air pressure regulator with multiple pressure switches installed, all the pressure switch mounting holes on the first air circuit (61) and the second air circuit (62) are blocked, and the air outlet valve (7) is in the open state. The air outlet of the second joint (8) is connected to the air inlet of the air pressure regulator; Among them, the multiple pressure switches include the first-stage normally open pressure switch, the second-stage normally open pressure switch, and the third-stage normally open pressure switch, as well as the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch.

4. The testing device for the air pressure regulator according to claim 2 or 3, characterized in that, the normally open pressure values of the first-stage normally open pressure switch, the second-stage normally open pressure switch, and the third-stage normally open pressure switch increase in sequence; the normally closed pressure values of the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch increase in sequence; the normally open pressure value of the first-stage normally open pressure switch is greater than the normally closed pressure value of the first-stage normally closed pressure switch; the normally open pressure value of the second-stage normally open pressure switch is greater than the normally closed pressure value of the second-stage normally closed pressure switch; the normally open pressure value of the third-stage normally open pressure switch is greater than the normally closed pressure value of the third-stage normally closed pressure switch.

5. The testing device for the air pressure regulator according to claim 1, characterized in that, when the testing device is used to test multiple pressure switches not installed on the air pressure regulator, the terminal posts X1 and X2 are used to respectively connect the positive lead-out wires of the first-stage normally open pressure switch and the first-stage normally closed pressure switch; the terminal posts X3 / X4 are respectively connected to the positive lead-out wires of the second-stage normally open pressure switch and the second-stage normally closed pressure switch; the terminal posts X5 / X6 are respectively connected to the positive lead-out wires of the third-stage normally open pressure switch and the third-stage normally closed pressure switch; the terminal post X7 is used to simultaneously connect the negative lead-out wires of the first-stage normally open pressure switch, the second-stage normally open pressure switch, the third-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally closed pressure switch, and the third-stage normally closed pressure switch.

6. The testing device for the air pressure regulator according to claim 1, characterized in that, when the testing device is used to test the entire air pressure regulator with multiple pressure switches installed, the pins 1, 2, 3, and 4 on the aviation plug HCT are respectively connected to one end of the alligator clip sleeves HCZ-1 / X01, HCZ-2 / X02, HCZ-3 / X03, and HCZ-4 / X04; The other ends of the alligator clip sleeves HCZ-1 / X01, HCZ-2 / X02 and HCZ-3 / X03 are respectively connected to the positive terminals of the first-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally open pressure switch, the second-stage normally closed pressure switch, the third-stage normally open pressure switch and the third-stage normally closed pressure switch on the air pressure regulator; The alligator clip sleeve HCZ-4 / X04 is connected to the common negative terminal of the first-stage normally open pressure switch, the second-stage normally open pressure switch, the third-stage normally open pressure switch, the first-stage normally closed pressure switch, the second-stage normally closed pressure switch and the third-stage normally closed pressure switch on the air pressure regulator.

7. The test device for the wind pressure regulator according to claim 5, It is characterized in that comprising a hollow device housing (13); A pressure regulating valve (4) and a pressure gauge (5) are provided on the front side of the device housing (13); A plurality of plug-in terminals (11) and a plurality of indicator lights (12) are also provided on the front of the device housing (13); A power switch (10) is provided on the front of the device housing (13); A passage plate (6), a filter (3), and a switch power supply are arranged on the back of the device housing (13); The pluggable terminal (11) includes terminals X1 to X7. A plurality of indicator lights (12) including pressure switch action indicator lights DY1, DY2 and DY3; A handle (15) is provided on the top of the device housing (13); A foot (16) is respectively provided at the four corners of the bottom of the device housing (13); An inlet ball valve (2) is provided on the left side of the device housing (13); A ball outlet valve (7) is provided on the right side of the device housing (13).

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