A wind pressure switch test system

Abstract

The utility model relates to the technical field of wind pressure switch testing, and discloses a wind pressure switch testing system, wherein the switch power supply module is connected to the pressure transmitter, the relay module and the wind pressure switch, the pressure transmitter, the frequency meter and the relay control module are all connected to the wind pressure switch, and the pressure transmitter and the relay control module are all connected to the pressure display module; the switch power supply module is used to supply power to the pressure transmitter, the relay control module and the wind pressure switch, the pressure transmitter is used to detect the pressure of the wind pressure switch, the frequency meter is used to detect the frequency of the wind pressure switch, the relay control module is used to lock the pressure value when the wind pressure switch is opened and closed, and the pressure display module is used to display the pressure value when the wind pressure switch is opened and closed. The utility model has the following technical effects: 1. It can be convenient to observe and record the pressure value when the wind pressure switch is actuated; 2. The detection speed is fast, and the detection is synchronized with the switch action.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind pressure switch testing, and in particular relates to a wind pressure switch testing system. Background Art

[0002] The air pressure switch has two detection ports, namely the positive pressure detection port and the negative pressure detection port. Its cavity is also divided into a positive pressure cavity and a negative pressure cavity. The two cavities are separated by a diaphragm. When there is a pressure source, the diaphragm moves to touch the micro switch to achieve the purpose of opening and closing.

[0003] The wind pressure switch test system converts the wind pressure switch quantity into two actions that can be automatically locked. When the wind pressure switch is pressurized to the pressure value of the switch closing, the normally open contact of the wind pressure switch closes, and the pressure value that makes the switch close is called the opening pressure. When the wind pressure switch pressure drops to the set disconnection pressure, the normally open contact of the wind pressure switch switches from the closed state to the disconnected state, and the pressure value that makes the wind pressure switch disconnect is called the closing pressure.

[0004] At present, during the test of the wind pressure switch, the opening and closing actions of the wind pressure switch are updated in real time, and the pressure value when the wind pressure switch is actuated cannot be observed and recorded. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a wind pressure switch testing system, which makes it easy to observe and record the pressure value when the wind pressure switch is actuated, and has the characteristics of fast detection speed and synchronization of detection and switch action.

[0006] The technical purpose to be achieved by the utility model is achieved through the following technical solutions:

[0007] The utility model provides a wind pressure switch test system, comprising a pressure transmitter, a frequency meter, a switch power supply module, a pressure display module and a relay control module;

[0008] The switch power supply module is connected to the pressure transmitter, the relay control module and the wind pressure switch, the pressure transmitter, the frequency meter and the relay control module are all connected to the wind pressure switch, and the pressure transmitter and the relay control module are all connected to the pressure display module;

[0009] The switching power supply module is used to supply power to the pressure transmitter, the relay control module and the wind pressure switch; the pressure transmitter is used to detect the pressure of the wind pressure switch; the frequency meter is used to detect the frequency of the wind pressure switch; the relay control module is used to lock the pressure value when the wind pressure switch is opened and closed; and the pressure display module is used to display the pressure value when the wind pressure switch is opened and closed.

[0010] In some implementations, the pressure display module includes a first pressure gauge and a second pressure gauge, the first pressure gauge is used to display the pressure value when the wind pressure switch is turned on, and the second pressure gauge is used to display the pressure value when the wind pressure switch is closed. The pressure values ​​when the wind pressure switch is turned on and when it is closed are displayed separately, so that the tester has more time to observe and record the pressure values.

[0011] In some implementations, the relay control module includes an on detection unit, a off detection unit, an on unlock switch, and a off unlock switch;

[0012] The opening detection unit is connected to the opening unlocking switch and the wind pressure switch, and the disconnection detection unit is connected to the disconnection unlocking switch and the wind pressure switch. The pressure value of the wind pressure switch locked by the opening detection unit when it is opened is unlocked by the opening unlocking switch, and the pressure value of the wind pressure switch locked by the disconnection detection unit when it is closed is unlocked by the disconnection unlocking switch, so as to continue the testing of the wind pressure switch.

[0013] In some implementations, a first switch diode is connected between the opening detection unit and the wind pressure switch. The first switch diode has the function of preventing voltage backflow and isolating the front stage from the rear stage, which is beneficial to improving the stability of the circuit.

[0014] In some implementations, the opening detection unit includes a first relay for opening unlocking, a second relay for opening locking, a third relay for opening locking and isolating the previous stage, and an opening output circuit;

[0015] The first relay is connected to the open and unlock switch, the wind pressure switch and the second relay, the second relay is connected to the third relay, and the third relay is connected to the open output circuit, so as to lock or unlock the pressure value when the wind pressure switch is turned on, and output the corresponding lock or unlock signal.

[0016] In some implementations, the turn-on output circuit includes a second switch diode and a first indicator light, the second switch diode is connected to the pressure display module, and a signal for locking or unlocking the pressure value when the wind pressure switch is turned on is output to the pressure display module through the second switch diode.

[0017] In some implementations, a level conversion module is connected between the frequency meter and the wind pressure switch, and the level conversion module converts the frequency signal of the wind pressure switch into a level that can be recognized by the frequency meter.

[0018] In some implementations, the level conversion module includes a first resistor and a first transistor, the first end of the first resistor is connected to the wind pressure switch, the second end of the first resistor is connected to the controlled end of the first transistor, the first end of the first transistor is connected to the frequency meter, and the second end of the first transistor is grounded, thereby achieving the effect of converting the frequency signal of the wind pressure switch into a level that can be recognized by the frequency meter.

[0019] In some implementations, the pressure transmitter is connected to a pressure reset button to facilitate continued testing of the wind pressure switch.

[0020] In some implementations, the switching power supply module includes a voltage stabilizing chip to provide a stable power supply.

[0021] In summary, the utility model has at least the following benefits:

[0022] The utility model provides a wind pressure switch testing system, which locks the opening pressure value and closing pressure value of the wind pressure switch through a relay control module to facilitate observation and recording by test personnel, and is simultaneously equipped with a pressure transmitter to detect the pressure of the wind pressure switch. When the wind pressure switch is actuated, the relay control module controls the pressure display module to display the corresponding pressure value of the wind pressure switch in this state, and has the characteristics of fast detection speed and synchronization of detection and switch action. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a test system according to Embodiment 1 of the present utility model;

[0024] Figure 2 This is a schematic diagram of a relay control module according to Embodiment 2 of the present utility model;

[0025] Figure 3 This is a schematic diagram of a level conversion module according to Embodiment 3 of the present utility model;

[0026] Figure 4 This is a schematic diagram of a power switch module according to Embodiment 3 of the present utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1 , a wind pressure switch testing system includes a pressure transmitter, a frequency meter, a switching power supply module, a pressure display module and a relay control module.

[0031] Among them, the switching power supply module is connected to the pressure transmitter, the relay module and the air pressure switch, the pressure transmitter, the frequency meter and the relay control module are all connected to the air pressure switch, and the pressure transmitter and the relay control module are all connected to the pressure display module.

[0032] The switching power supply module is used to supply power to the pressure transmitter, relay module and air pressure switch; the pressure transmitter is a pressure detection module in the air pressure switch test system, and its main function is to detect the pressure of the air pressure switch and convert the detected pressure into a voltage signal output; the frequency meter is used to detect the frequency of the air pressure switch; the relay control module is used to lock the pressure value when the air pressure switch is opened and closed; the pressure display module is used to display the pressure value when the air pressure switch is opened and closed, convert the voltage output by the pressure transmitter into a digital quantity, and display the pressure value in the form of a numerical value displayed by a digital tube.

[0033] It is known that the wind pressure switch test system converts the wind pressure switch quantity into two actions that can be automatically locked. When the wind pressure switch is pressurized to the pressure value of the switch closing, the normally open contact of the wind pressure switch closes, and the pressure value that closes the switch is called the opening pressure. When the wind pressure switch pressure drops to the set disconnection pressure, the normally open contact of the wind pressure switch switches from the closed state to the disconnected state, and the pressure value that disconnects the wind pressure switch is called the closing pressure.

[0034] The core of the wind pressure switch test system provided in this embodiment is a pure hardware switch detection circuit built by a relay control module, including functions such as locking the wind pressure switch action and converting the wind pressure switch action. For example, after the system is powered on, the pressure transmitter and the pressure display module start working. When the pressure transmitter detects a pressure change, it will output a corresponding voltage signal to the pressure display module according to the detected pressure size. After the pressure display module receives the voltage signal, it will convert the voltage into a corresponding pressure value and display it; when the relay control module receives the closing action of the normally open contact of the wind pressure switch, it will output a locking action to lock the pressure value when the wind pressure switch is turned on, thereby realizing the function of opening the pressure value storage; when the relay control module receives the normally open contact of the wind pressure switch from a closed state to an open state, it will output a locking action to lock the pressure value when the wind pressure switch is closed, thereby realizing the function of closing the pressure value storage.

[0035] In some embodiments, the pressure display module includes a first pressure gauge and a second pressure gauge. The first pressure gauge is used to display the pressure value when the wind pressure switch is turned on, and the second pressure gauge is used to display the pressure value when the wind pressure switch is closed. The pressure values ​​when the wind pressure switch is turned on and when it is closed are displayed separately, so that the tester has more time to observe and record the pressure values.

[0036] For example, when the relay control module receives the closing action of the normally open contact of the wind pressure switch, it will output a locking action to the first pressure gauge to lock the pressure value when the wind pressure switch is opened, and the first pressure gauge will display the pressure detected by the pressure transmitter at this time, so that the tester can observe and record it; when the relay control module receives the normally open contact of the wind pressure switch to change from a closed state to an open state, it will output a locking action to the second pressure gauge to lock the pressure value when the wind pressure switch is closed, and the second pressure gauge will display the pressure detected by the pressure transmitter at this time, so that the tester can observe and record it.

[0037] Compared with traditional test systems, the wind pressure switch test system provided in this example is easy to observe and record the pressure value when the wind pressure switch is actuated, has the characteristics of fast detection speed, and synchronization of detection and switch action. It does not require customized parts and software development. Compared with PLC control systems, it has the advantages of low development cost and easy promotion and application.

[0038] Embodiment 2:

[0039] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the relay control module of the utility model, see Figure 2 .

[0040] The relay control module includes an opening detection unit, a disconnection detection unit, an opening unlocking switch and a disconnection unlocking switch. The opening detection unit is connected to the opening unlocking switch and the wind pressure switch, and the disconnection detection unit is connected to the disconnection unlocking switch and the wind pressure switch. The pressure value of the wind pressure switch locked by the opening detection unit when it is opened is unlocked by the opening unlocking switch, and the pressure value of the wind pressure switch locked by the disconnection detection unit when it is closed is unlocked by the disconnection unlocking switch, so as to continue the testing of the wind pressure switch.

[0041] Specifically, the opening detection unit and the disconnection detection unit are both connected to the wind pressure switch, and the opening detection unit and the disconnection detection unit are both connected to the pressure display module. When the opening detection unit detects the closing action of the normally open contact of the wind pressure switch, a locking action is output to the pressure display module to lock the pressure value when the wind pressure switch is opened, so as to record and store the pressure value. When it is necessary to unlock the pressure value when it is opened, a signal can be output to the opening detection unit by opening the unlocking switch, and the opening detection unit outputs the unlocking action to the pressure display module. Similarly, when the disconnection detection unit detects the disconnection action of the normally open contact of the wind pressure switch, a locking action is output to the pressure display module to lock the pressure value when the wind pressure switch is closed, so as to record and store the pressure value. When it is necessary to unlock the pressure value when it is closed, a signal can be output to the disconnection detection unit by opening the unlocking switch, and the disconnection detection unit outputs the unlocking action to the pressure display module.

[0042] In some embodiments, a first switch diode is connected between the opening detection unit and the wind pressure switch. The first switch diode is D12. The first switch diode D12 has the function of preventing voltage backflow and isolating the front stage from the rear stage, which is beneficial to improving the stability of the circuit.

[0043] In some embodiments, the opening detection unit includes a first relay for opening unlocking, a second relay for opening locking, a third relay for opening locking and isolating from the previous stage, and an opening output circuit. Figure 2 The first relay is K1, the second relay is K2, the third relay is K4, the open and unlock switch is SW2, and the wind pressure switch is SK1. The first relay K1 is connected to the open and unlock switch SW2, the wind pressure switch and the second relay K2. The second relay K2 is connected to the third relay K4. The third relay K4 is connected to the open output circuit to lock or unlock the pressure value when the wind pressure switch is turned on, and output the corresponding lock or unlock signal.

[0044] Specifically, when the wind pressure switch SK1 is closed, the power supply passes through the first switch diode D12 and the first relay K1, so that the second relay K2 is energized, so that the second relay K2 is normally open and closed to complete self-locking, that is, the pressure value when the wind pressure switch is turned on is locked, and the coil of the third relay K4 is energized, thereby outputting a locking signal to the opening output circuit; on the contrary, when the wind pressure switch SK1 is in a closed state or the second relay K2 is in a self-locking state, pressing the unlocking switch SW2 once to open the first relay K1 normally closed and disconnected, the coil of the second relay K2 loses power, and the self-locking state of the second relay K2 is reset and disconnected, and the coil of the third relay K4 is de-energized, so that there is no locking output to the opening output circuit.

[0045] In some embodiments, the output circuit is turned on and includes a second switching diode and a first indicator light, the second switching diode is D16, the first indicator light is LED2, the second switching diode D16 is connected to the pressure display module, and the signal for locking or unlocking the pressure value when the wind pressure switch is turned on is output to the pressure display module through the second switching diode D16, and the opening and locking status is displayed by lighting up the first indicator light LED2.

[0046] Similarly, regarding the disconnection detection unit, the disconnection detection unit includes relays K3, K5-K10, switching diodes D14 and D15, and indicator light LED1. When the wind pressure switch SK1 is disconnected, relay K5 supplies power to the relay K9 coil, relay K3 supplies power to the relay K9 coil, and relays K8 and relay K9 form a self-locking state, so that the relay K10 coil is energized, thereby outputting a signal to lock the pressure value when the wind pressure switch is closed to the pressure display module through the switching diode D15, and displaying the disconnection lock state by lighting the indicator light LED1; when the disconnection unlocking switch SW1 is pressed, the power supply supplies power to the relay K7 coil through the switching diode D14 and relay K6 to self-lock, and relay K7 supplies power to the relay K8 coil, so the relay K9 coil is reset to disconnect lock after losing power due to the normally closed disconnection of relay K8.

[0047] Embodiment 3:

[0048] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the wind pressure switch test system of the utility model, see Figure 3 .

[0049] A level conversion module is connected between the frequency meter and the wind pressure switch, and the frequency signal of the wind pressure switch is converted into a level that can be recognized by the frequency meter through the level conversion module.

[0050] Specifically, the level conversion module includes a first resistor and a first transistor, the first resistor is R1, the first transistor is Q1, the first end of the first resistor R1 is connected to the wind pressure switch, the second end of the first resistor R1 is connected to the controlled end of the first transistor Q1, the first end of the first transistor Q1 is connected to the frequency meter, and the second end of the first transistor Q1 is grounded, thereby achieving the effect of converting the frequency signal of the wind pressure switch into a level that can be recognized by the frequency meter.

[0051] In some embodiments, the pressure transmitter is connected to a pressure reset button, through which the data is reset to zero, so as to continue the test of the wind pressure switch; see Figure 4 The switching power supply module includes a voltage stabilizing chip, which is U1. The voltage stabilizing chip U1 can stabilize the voltage in the circuit and provide a stable power supply.

[0052] The wind pressure switch testing system of the utility model locks the opening pressure value and the closing pressure value of the wind pressure switch through the relay control module, so as to facilitate the observation and recording by the test personnel. At the same time, a pressure transmitter is provided to detect the pressure of the wind pressure switch. When the wind pressure switch is actuated, the relay control module controls the pressure display module to display the pressure value of the wind pressure switch in this state. The utility model has the characteristics of fast detection speed and synchronization of detection and switch action.

[0053] In the present invention, the term "module" used may be a software or hardware object executed on the computing system. The different components, modules, engines and services described herein may be implementation objects on the computing system. The apparatus and method described herein may be implemented in software or in hardware, and all are within the scope of protection of this application.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. A wind pressure switch testing system, characterized in that: Including pressure transmitter, frequency meter, switch power supply module, pressure display module and relay control module; The switch power supply module is connected to the pressure transmitter, the relay control module and the wind pressure switch, the pressure transmitter, the frequency meter and the relay control module are all connected to the wind pressure switch, and the pressure transmitter and the relay control module are all connected to the pressure display module; The switching power supply module is used to supply power to the pressure transmitter, the relay control module and the wind pressure switch; the pressure transmitter is used to detect the pressure of the wind pressure switch; the frequency meter is used to detect the frequency of the wind pressure switch; the relay control module is used to lock the pressure value when the wind pressure switch is opened and closed; and the pressure display module is used to display the pressure value when the wind pressure switch is opened and closed.

2. The wind pressure switch testing system according to claim 1, characterized in that: The pressure display module includes a first pressure gauge and a second pressure gauge, wherein the first pressure gauge is used to display the pressure value when the wind pressure switch is turned on, and the second pressure gauge is used to display the pressure value when the wind pressure switch is closed.

3. The wind pressure switch testing system according to claim 1, characterized in that: The relay control module includes an opening detection unit, a disconnection detection unit, an opening unlocking switch and a disconnection unlocking switch; The opening detection unit is connected to the opening unlocking switch and the wind pressure switch, and the disconnection detection unit is connected to the disconnection unlocking switch and the wind pressure switch.

4. The wind pressure switch testing system according to claim 3, characterized in that: A first switch diode is connected between the opening detection unit and the wind pressure switch.

5. The wind pressure switch testing system according to claim 3, characterized in that: The opening detection unit includes a first relay for opening unlocking, a second relay for opening locking, a third relay for opening locking and isolating from the previous stage, and an opening output circuit; The first relay is connected to the opening and unlocking switch, the wind pressure switch and the second relay, the second relay is connected to the third relay, and the third relay is connected to the opening output circuit.

6. The wind pressure switch testing system according to claim 5, characterized in that: The start-up output circuit includes a second switch diode and a first indicator light, and the second switch diode is connected to the pressure display module.

7. The wind pressure switch testing system according to claim 1, characterized in that: A level conversion module is connected between the frequency meter and the wind pressure switch.

8. The wind pressure switch testing system according to claim 7, characterized in that: The level conversion module includes a first resistor and a first transistor, wherein the first end of the first resistor is connected to the wind pressure switch, the second end of the first resistor is connected to the controlled end of the first transistor, the first end of the first transistor is connected to the frequency meter, and the second end of the first transistor is grounded.

9. The wind pressure switch testing system according to claim 1, characterized in that: The pressure transmitter is connected with a pressure reset button.

10. The wind pressure switch testing system according to claim 1, characterized in that: The switching power supply module includes a voltage stabilizing chip.

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