CN211525053U

CN211525053U - Mechanical pressure regulator

Info

Publication number: CN211525053U
Application number: CN202020069257.3U
Authority: CN
Inventors: 魏志鑫; 张心周; 于林海; 徐刚; 马双阳; 张俊杰
Original assignee: Qingdao Hongda Schnell Science & Technology Co ltd
Current assignee: Qingdao Hongda Schnell Science & Technology Co ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-09-18
Anticipated expiration: 2030-01-13

Abstract

The utility model relates to a mechanical type pressure regulator, include: the relay processing circuit is used for converting a pressure signal output by the mechanical pressure switch; the front end of the mechanical pressure switch is provided with an electromagnetic valve for controlling the output pressure of the mechanical pressure switch; the relay processing circuit comprises a relay group and a current-limiting protection circuit connected with the relay group; the mechanical pressure switch selects one group of relays communicated with the relay group according to the output pressure signal. The utility model adopts the mode of combining the mechanical pressure switch and the relay processing circuit, can output a plurality of groups of switch signals, and avoids the faults of wrong output signals, no output signals and the like caused by electromagnetic interference of the pressure regulator of the electronic pressure switch; meanwhile, the defect that the mechanical pressure switch cannot be reset after being powered off and powered on again is overcome by the arrangement of the electromagnetic valve; the relay processing circuit is provided with a current-limiting protection circuit to prevent circuit components from being damaged.

Description

Mechanical pressure regulator

Technical Field

The utility model belongs to pressure regulator field especially relates to a mechanical type pressure regulator.

Background

The pressure regulator has the function of controlling the starting and stopping of the auxiliary air compressor according to the pressure of the air cylinder in the auxiliary air compressor device of the high-speed motor train unit. The pressure regulator used in the auxiliary air compressor device of the motor train unit in China at present is an electronic pressure regulator which works by using a push valve and an exhaust valve to keep the outlet pressure at a required set point. The electronic pressure regulator adopts an electronic pressure switch, converts a collected pressure signal into a voltage signal, outputs an on or off signal through voltage comparison, and adjusts the timing of a servo valve by a digital or analog controller so as to maintain a set point. However, as the electromagnetic environment for vehicle operation becomes more complex, the pressure regulator using the electronic pressure switch begins to suffer from electromagnetic interference, which causes errors in output signals, failure in output signals, and the like.

Accordingly, there is a need for an improvement over existing pressure regulators to provide a mechanical pressure regulator that employs a mechanical pressure switch.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects existing in the prior art, the utility model provides a mechanical pressure regulator.

In order to achieve the above object, the present invention provides the following technical solutions:

a mechanical pressure regulator comprising: the relay processing circuit is used for converting a pressure signal output by the mechanical pressure switch; the front end of the mechanical pressure switch is provided with an electromagnetic valve for controlling the output pressure of the mechanical pressure switch; the relay processing circuit comprises a relay group and a current-limiting protection circuit connected with the relay group; and the mechanical pressure switch selects one group of relays communicated with the relay group according to the output pressure signal.

Preferably, the current-limiting protection circuit comprises a resistor R4, an anti-reverse diode D3, a resistor R2 and an anti-reverse diode D5; the resistor R4 and the anti-reverse diode D3 are connected in series, the other end of the resistor R4 is connected with the output end of the relay set, and the cathode of the anti-reverse diode D3 is connected to the 5 pin of the wiring terminal; the resistor R2 and the anti-reverse diode D5 are connected in series, the other end of the resistor R2 is connected with the output end of the relay set, and the cathode of the anti-reverse diode D5 is connected to the 4 pins of the wiring terminal.

Preferably, the current-limiting protection circuit further comprises a resistor R3, a light emitting diode LED1, an anti-reverse diode D4, a resistor R1, a light emitting diode LED2, and an anti-reverse diode D6; the resistor R3, the light-emitting diode LED1 and the anti-reverse diode D4 are sequentially connected in series, the other end of the resistor R3 is connected with the output end of the relay set, and the anode of the anti-reverse diode D4 is connected with the 5 pin of the wiring terminal; the resistor R1, the light emitting diode LED2 and the anti-reverse diode D6 are sequentially connected in series, the other end of the resistor R1 is connected with the output end of the relay set, and the anode of the anti-reverse diode D6 is connected with the 4 pins of the wiring terminal.

Preferably, the current-limiting protection circuit further comprises contactors K3, K4, K5 and K6, wherein the contactors K3 and K4 are connected in series with the 2 pin and the 5 pin of the connecting terminal and grounded; the contactor K5 is connected with the 3 pins and the 4 pins of the connecting terminal and is grounded; the contactor K5 is connected with the 6 pins and the 7 pins of the connecting terminal and is grounded; and pin 1 of the wiring terminal is connected to the output end of the relay group and grounded.

Preferably, the electromagnetic valve adopts a normally open type two-position three-way valve.

Preferably, the relay set comprises two sets of relays K1 and K2 connected in parallel, and each of the relays K1 and K2 comprises two sets of normally open contacts.

Preferably, the two ends of the relays K1 and K2 are connected in parallel with the anti-reverse diodes D7 and D8, the anodes of the anti-reverse diodes D7 and D8 are connected with the output ends of the relays K1 and K2, and the cathodes of the anti-reverse diodes D7 and D8 are connected with the output ends of the relays K1 and K2.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

the utility model provides a mechanical type pressure regulator adopts the mode of mechanical type pressure switch and the combination of relay processing circuit, can export multiunit switching signal. The mechanical pressure switch replaces the original electronic sensor type, so that faults of wrong output signals, no output signals and the like caused by electromagnetic interference of a pressure regulator of the electronic pressure switch are avoided; meanwhile, the electromagnetic valve used for controlling the output pressure of the mechanical pressure switch is arranged at the front end of the mechanical pressure switch, so that the defect that the mechanical pressure switch cannot be reset after being powered off and powered on again is overcome. The relay processing circuit converts the output pressure signals of the mechanical pressure switch, and the mechanical pressure switch can select one group of relays communicated with the relay group according to the output pressure signals. Meanwhile, the relay processing circuit is provided with a current-limiting protection circuit to prevent circuit components from being damaged.

Drawings

FIG. 1 is a schematic circuit diagram of a mechanical pressure regulator according to the present invention;

FIG. 2 is a schematic diagram of the gas path of the mechanical pressure regulator of the present invention;

1-mechanical pressure switch, 2-electromagnetic valve, 3-air cylinder.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention and the above-described drawings are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.

An embodiment of the present invention provides a mechanical pressure regulator, referring to fig. 1 and fig. 2, including: the mechanical pressure switch 1 and a relay processing circuit for converting the pressure signal output by the mechanical pressure switch; the front end of the mechanical pressure switch 1 is provided with an electromagnetic valve 2 for controlling the output pressure of the mechanical pressure switch; the relay processing circuit comprises a relay group and a current-limiting protection circuit connected with the relay group; the mechanical pressure switch selects one group of relays communicated with the relay group according to the output pressure signal.

Referring to fig. 1, the relay set in this embodiment includes two sets of relays K1 and K2 connected in parallel, each of the relays K1 and K2 includes two sets of normally open contacts, and the mechanical pressure switch 1 selects one of the relays K1 or K2 according to an output pressure signal to control and output multiple sets of switch signals. The current-limiting protection circuit comprises a resistor R4, an anti-reverse diode D3, a resistor R2 and an anti-reverse diode D5; the LED driving circuit comprises a resistor R3, a light emitting diode LED1, an anti-reflection diode D4, a resistor R1, a light emitting diode LED2 and an anti-reflection diode D6; contactors K3, K4, K5, K6. The resistor R4 and the anti-reverse diode D3 are connected in series, the other end of the resistor R4 is connected with the output ends of the relay K1 and the relay K2, and the cathode of the anti-reverse diode D3 is connected to the 5 pin of the connecting terminal; the resistor R2 and the anti-reverse diode D5 are connected in series, the other end of the resistor R2 is connected with the output ends of the relay devices K1 and K2, and the cathode of the anti-reverse diode D5 is connected to the 4 pins of the wiring terminal. The resistor R3, the light-emitting diode LED1 and the anti-reverse diode D4 are sequentially connected in series, the other end of the resistor R3 is connected with the output ends of the relays K1 and K2, and the anode of the anti-reverse diode D4 is connected with the 5 pin of the connecting terminal; the resistor R1, the light emitting diode LED2 and the anti-reflection diode D6 are sequentially connected in series, the other end of the resistor R1 is connected with the output ends of the relays K1 and K2, and the anode of the anti-reflection diode D6 is connected with the 4 pins of the connecting terminal. The contactors K3 and K4 are connected with the pin 2 and the pin 5 of the wiring terminal in series and are grounded; the contactor K5 is connected with the 3 pins and the 4 pins of the connecting terminal and is grounded; the contactor K5 is connected with the 6 pins and the 7 pins of the connecting terminal and is grounded; the pin 1 of the connecting terminal is connected to the output ends of the relays K1 and K2 and is grounded. Two ends of the relays K1 and K2 are connected with anti-reverse diodes D7 and D8 in parallel, anodes of the anti-reverse diodes D7 and D8 are connected with output ends of the relays K1 and K2, and cathodes of the anti-reverse diodes D7 and D8 are connected with output ends of the relays K1 and K2.

In order to make the pressure regulator of the present invention clearer, the working principle of the present invention is explained as follows:

the utility model discloses a mode of mechanical type pressure switch and relay processing circuit combination can export multiunit switching signal, for example can be through setting up two sets of normally open signals of relay K1 output, and two sets of normally open contacts establish ties the output through controlling the OUT signal, are used for controlling the compressor and start and stop, and the simultaneous control emitting diode LED1 lights and extinguishes. The relay K2 outputs two groups of normally open signals, one group controls the VCB in the driver's cab to prepare the on and off of the warning lamp which is not finished through controlling the output of the OUT2 signal, and simultaneously controls the on and off of the LED2, and the other group is a redundant signal for vehicle detection. When the pressure signal output by the mechanical pressure switch is lower than a set pressure value P1, the mechanical pressure switch is controlled to be communicated with a relay K1, the relay K1 is electrified, a normally open contact of the relay K1 is closed, a power supply loop of a compressor at the vehicle end is switched on at the moment, the compressor can be normally started, and meanwhile, a light-emitting diode LED1 is lightened; when the pressure signal output by the mechanical pressure switch rises to a set pressure value P2, the relay K1 is de-energized, the normally open contact is disconnected, and the compressor stops working; at the moment, the relay K2 is electrified, the two groups of normally open contacts are closed, the VCB in the cab is controlled to be ready for the alarm lamp to be turned off, and meanwhile, the LED2 is controlled to be turned on. The mechanical pressure switch controls the on-off of the circuit through the deformation of the air pressure to the spring, so that faults of signal output error, signal non-output and the like caused by electromagnetic interference of a pressure regulator of the electronic pressure switch are avoided. Because the mechanical pressure switch is still in a state before power failure when being powered on, when the air pressure is greater than P1 during vehicle preparation, the compressor cannot be started, and when compressed air is consumed in work such as pantograph rising operation of a vehicle, the air pressure is reduced to be lower than a pressure value P1, the mechanical pressure switch acts, the state is switched, a driver needs to operate the compressor to start, vehicle preparation work such as pantograph rising operation may need to be carried out again, and the vehicle preparation time is prolonged. In contrast, the utility model discloses a be provided with the solenoid valve 2 that is used for controlling mechanical pressure switch output pressure at mechanical pressure switch 1 front end, the solenoid valve can adopt the two-position three-way valve of open type, and solenoid valve 2 intercommunication reservoir 3 and mechanical pressure switch 1 can be through controlling solenoid valve 2, when making pressure regulator power, disconnection solenoid valve after evacuation rear end mechanical pressure switch pressure; when the pressure regulator works normally, the electromagnetic valve is in a non-electrified state, the effect of power-off reset of the mechanical pressure switch is achieved by delaying power-off of the electromagnetic valve, and the condition that the mechanical pressure switch is still kept in a state before power-off when the mechanical pressure switch is electrified is avoided.

Compared with a common electronic pressure regulator, the present embodiment adopts a combination of a mechanical pressure switch and a relay processing circuit, and can output multiple sets of switch signals. The mechanical pressure switch replaces the original electronic sensor type, so that faults of wrong output signals, no output signals and the like caused by electromagnetic interference of a pressure regulator of the electronic pressure switch are avoided; meanwhile, the electromagnetic valve used for controlling the output pressure of the mechanical pressure switch is arranged at the front end of the mechanical pressure switch, so that the defect that the mechanical pressure switch cannot be reset after being powered off and powered on again is overcome. The relay processing circuit converts the output pressure signals of the mechanical pressure switch, and the mechanical pressure switch can select one group of relays communicated with the relay group according to the output pressure signals. Meanwhile, the relay processing circuit is provided with a current-limiting protection circuit to prevent circuit components from being damaged.

Claims

1. A mechanical pressure regulator, comprising: the relay processing circuit is used for converting a pressure signal output by the mechanical pressure switch; the front end of the mechanical pressure switch is provided with an electromagnetic valve for controlling the output pressure of the mechanical pressure switch; the relay processing circuit comprises a relay group and a current-limiting protection circuit connected with the relay group; and the mechanical pressure switch selects one group of relays communicated with the relay group according to the output pressure signal.

2. The mechanical pressure regulator of claim 1, wherein the current limiting protection circuit comprises a resistor R4, an anti-kickback diode D3, a resistor R2, an anti-kickback diode D5; the resistor R4 and the anti-reverse diode D3 are connected in series, the other end of the resistor R4 is connected with the output end of the relay set, and the cathode of the anti-reverse diode D3 is connected to the 5 pin of the wiring terminal; the resistor R2 and the anti-reverse diode D5 are connected in series, the other end of the resistor R2 is connected with the output end of the relay set, and the cathode of the anti-reverse diode D5 is connected to the 4 pins of the wiring terminal.

3. The mechanical pressure regulator according to claim 2, wherein the current limiting protection circuit further comprises a resistor R3, a light emitting diode LED1, an anti-reflection diode D4, and a resistor R1, a light emitting diode LED2, an anti-reflection diode D6; the resistor R3, the light-emitting diode LED1 and the anti-reverse diode D4 are sequentially connected in series, the other end of the resistor R3 is connected with the output end of the relay set, and the anode of the anti-reverse diode D4 is connected with the 5 pin of the wiring terminal; the resistor R1, the light emitting diode LED2 and the anti-reverse diode D6 are sequentially connected in series, the other end of the resistor R1 is connected with the output end of the relay set, and the anode of the anti-reverse diode D6 is connected with the 4 pins of the wiring terminal.

4. The mechanical pressure regulator according to claim 3, wherein the current limiting protection circuit further comprises contactors K3, K4, K5 and K6, wherein contactors K3 and K4 connect the 2 pin and the 5 pin of the connection terminal in series and are grounded; the contactor K5 is connected with the 3 pins and the 4 pins of the connecting terminal and is grounded; the contactor K5 is connected with the 6 pins and the 7 pins of the connecting terminal and is grounded; and pin 1 of the wiring terminal is connected to the output end of the relay group and grounded.

5. The mechanical pressure regulator according to any one of claims 1 to 4, wherein the solenoid valve employs a normally open two-position three-way valve.

6. The mechanical pressure regulator according to any one of claims 1 to 4, wherein the relay set comprises two sets of relays K1, K2 connected in parallel, each of the relays K1, K2 having two sets of normally open contacts.

7. The mechanical pressure regulator as claimed in claim 6, wherein the anti-reverse diodes D7 and D8 are connected in parallel at two ends of the relays K1 and K2, the anodes of the anti-reverse diodes D7 and D8 are connected with the output ends of the relays K1 and K2, and the cathodes of the anti-reverse diodes D7 and D8 are connected with the output ends of the relays K1 and K2.