CN208185574U - A kind of liquid launch vehicle solenoid valve arrow ground dual control isolation circuit - Google Patents

Abstract

The utility model relates to providing a dual-control isolation circuit for an electromagnetic valve of a liquid carrier rocket. One end of the first isolation circuit is connected to the positive pole of the power supply on the arrow through a first control switch, and the other end is connected to the positive pole of the double-control electromagnetic valve to control the power supply on the arrow. One-way conduction from the positive pole to the positive pole of the dual-control solenoid valve; the first control switch conducts under the control of the arrow control command; one end of the second isolation circuit is connected to the positive pole of the ground power supply through the second control switch, and the other end is connected to the dual-control solenoid valve The positive pole of the ground power supply controls the one-way conduction of the positive pole of the ground power supply to the positive pole of the dual-control solenoid valve; the second control switch is conducted under the control of the ground control command; the peak-suppressing circuit is connected between the positive pole and the negative pole of the double-control solenoid valve, Eliminate the counter electromotive force generated at the moment of power failure of the double control solenoid valve. By applying an isolation circuit to the control end of the arrow-ground dual-control solenoid valve, the two-way isolation between the ground and the arrow is realized, ensuring that the control solenoid valve commands do not conflict, and avoiding the occurrence of power surges or sneak paths.

Description

A dual-control isolation circuit for liquid carrier rocket solenoid valve rocket and ground

technical field

The utility model relates to a double-control isolation circuit for an electromagnetic valve of a liquid carrier rocket, and belongs to the technical field of carrier rocket electrical systems.

Background technique

There are a large number of electromagnetic valves with dual control of the rocket and the ground in the new generation of liquid launch vehicle engines. According to the rocket work flow, there is a handover process of ground and rocket control before the rocket takes off. During the rocket filling process, in order to ensure the normal operation of the engine, it is necessary to control some solenoid valves on the ground in advance, and then hand them over to the rocket to control the above solenoid valves before the rocket is ignited. process of control.

Since this part of the rocket-ground dual-control solenoid valve is controlled by the rocket and the ground at the same time, there will be conflicts in the control instructions of the rocket-ground solenoid valve, hidden paths, and other unpredictable risks in the hardware path, which may eventually lead to the failure of the launch mission.

How to design the control circuit of the dual-control solenoid valve to ensure that the commands of the control solenoid valve do not conflict is a technical problem to be solved urgently in this field.

Utility model content

The purpose of this utility model is to overcome the above-mentioned deficiencies of the prior art, to provide a liquid carrier rocket electromagnetic valve arrow-ground dual-control isolation circuit, by applying an isolation circuit at the control end of the arrow-ground dual-control electromagnetic valve, the two-way connection between the ground and the arrow can be realized. Isolation to ensure that the control solenoid valve commands do not conflict, and to avoid the occurrence of power surges or sneak paths.

The above-mentioned purpose of the utility model is achieved through the following technical solutions:

A dual-control isolation circuit for a solenoid valve of a liquid carrier rocket is provided, which is characterized in that it includes a first isolation circuit, a second isolation circuit, and a peak-suppression circuit;

One end of the first isolation circuit is connected to the positive pole of the power supply on the arrow through the first control switch, and the other end is connected to the positive pole of the double-control solenoid valve to control the one-way conduction from the positive pole of the power supply on the arrow to the positive pole of the double-control solenoid valve; the first control switch It is turned on under the control of the arrow control command;

One end of the second isolation circuit is connected to the positive pole of the ground power supply through the second control switch, and the other end is connected to the positive pole of the dual-control solenoid valve to control the one-way conduction from the positive pole of the ground power supply to the positive pole of the dual-control solenoid valve; the second control switch is connected to the positive pole of the ground power supply. Conduction under the control of the control command;

The negative poles of the power supply on the arrow and the ground power supply are connected to the negative pole of the dual-control solenoid valve, and the peak elimination circuit is connected between the positive and negative poles of the dual-control solenoid valve to eliminate the counter electromotive force generated at the moment of power-off of the dual-control solenoid valve.

Preferably, the first isolation circuit is a diode or two diodes arranged in parallel.

Preferably, the second isolation circuit is a diode or two diodes arranged in parallel.

Preferably, the first isolation circuit has the same structure as the second isolation circuit.

Preferably, the peak clipping circuit includes a resistor R and a diode V5, one end of the resistor R is connected to the positive pole of the dual control solenoid valve, the other end is connected to the negative pole of the diode V5, and the positive pole of the diode V5 is connected to the negative pole of the dual control solenoid valve.

Preferably, the dual-control solenoid valve is an arrow-on-engine solenoid valve.

The beneficial effects of the utility model compared with the prior art are:

(1) The dual-control isolation circuit of the rocket-ground solenoid valve of the liquid carrier rocket of the present utility model implements two-way isolation between the ground and the rocket by applying an isolation circuit to the control end of the rocket-ground dual-control solenoid valve, avoiding potential paths and ensuring the system to work Safety.

(2) The diode of the present invention adopts dual redundant arrangement, which further improves the reliability of isolation and avoids the inability to communicate instructions caused by damage during the period.

(3) In the utility model, a peak-suppressing circuit is arranged in parallel between the positive and negative ends of the solenoid valve, so as to avoid damage to the isolation circuit due to a power surge when the solenoid valve is closed, and further improve the reliability of the system.

(4) The isolation circuit of the utility model is simple in structure, low in cost, easy to implement, and avoids extra weight on the bullet.

Description of drawings

Fig. 1 is the circuit diagram of the isolation circuit of the double control solenoid valve of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figure 1, a diode isolation circuit is added between the positive end of the engine arrow and ground double control solenoid valve, the positive end of the control command on the arrow, and the positive end of the ground control command. In order to ensure that the control command is reliable through the diode isolation circuit to the solenoid valve For control, each diode isolation circuit consists of 2 diodes connected in parallel.

The arrow up control command is connected with the diode isolation circuit output end of the ground control command to realize the isolation between the arrow up control command and the ground control command. An anti-peak circuit is added at the negative end of the solenoid valve and the output end of the diode isolation circuit to ensure the correctness of the polarity of the solenoid valve control command and to eliminate the counter electromotive force generated at the moment the solenoid valve is closed.

In order to ensure that the control command reliably controls the solenoid valve through the diode isolation circuit, each diode isolation circuit is composed of 2 diodes connected in parallel. One end of the arrow control command switch K1 is connected to the positive terminal of the 28V arrow power supply, and the other end is connected to the positive terminals of the diodes V1 and V2. One end of the ground control command switch K2 is connected to the positive end of the 28V ground power supply, and the other end is connected to the positive ends of the diodes V3 and V4. The negative ends of the diodes V1-V4 are connected together, and connected with the positive end of the engine solenoid valve, and also connected with one end of the resistance R of the peak elimination circuit at one point. The negative terminal of the engine solenoid valve is connected with the negative terminal of the 28V power supply on the arrow, the negative terminal of the 28V power supply on the ground, and the positive terminal of the diode V5 respectively. The negative terminal of the diode V5 is connected to the other terminal 2 of the resistor R.

When the ground surface controls the solenoid valve, its control switch K2 is closed, the ground 28V control command passes through K2 and then passes through the isolation circuit V3, V4 to reach the positive terminal of the solenoid valve, and finally returns to the negative terminal of the ground power supply through the negative terminal of the solenoid valve to realize Control the solenoid valve. Because the arrow is equipped with isolation circuit diodes V1 and V2, the ground control command cannot enter the arrow through V1 and V2 to form a submerged path, which realizes the isolation of the control command on the arrow from the ground control command. Due to the setting of the diode V5 of the anti-inversion peak circuit, the positive end of the ground control command cannot enter the negative end of the engine solenoid valve through V5, resulting in a control polarity error.

Similarly, when the arrow controls the solenoid valve, its switch K1 is closed, and the 28V control command on the arrow passes through K1, then passes through the isolation circuit V1, V2 to the positive terminal of the solenoid valve, and finally returns to the power supply on the arrow through the negative terminal of the solenoid valve. The negative end of the terminal realizes the control of the solenoid valve. Because the isolation circuit diodes V3 and V4 are set on the ground, the control command on the arrow cannot enter the ground through V3 and V4 to form a submerged path, which realizes the isolation of the control command from the ground to the control command on the arrow. Due to the setting of the diode V5 of the reverse peak circuit, the positive terminal of the control command on the arrow cannot enter the negative terminal of the engine solenoid valve through V5, resulting in a control polarity error.

The dual-control isolation circuit for the electromagnetic valve of the liquid carrier rocket and the arrow ground of the utility model has been verified by a number of large-scale tests such as the power system test run and the flight test. And avoid the occurrence of power surge or sneak path.

The above is only the best specific implementation of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of it within the technical scope disclosed in the utility model Changes or replacements should fall within the protection scope of the present utility model.

The content that is not described in detail in the description of the utility model belongs to the known technology of those skilled in the art.

Claims (6)

1. A dual-control isolation circuit for the electromagnetic valve of a liquid carrier rocket, characterized in that: it includes a first isolation circuit, a second isolation circuit and a peak-suppression circuit; One end of the first isolation circuit is connected to the positive pole of the power supply on the arrow through the first control switch (K1), and the other end is connected to the positive pole of the double-control solenoid valve to control the one-way conduction from the positive pole of the power supply on the arrow to the positive pole of the double-control solenoid valve; A control switch (K1) is turned on under the control of the arrow control command; One end of the second isolation circuit is connected to the positive pole of the ground power supply through the second control switch (K2), and the other end is connected to the positive pole of the dual-control solenoid valve to control the one-way conduction from the positive pole of the ground power supply to the positive pole of the double-control solenoid valve; the second control The switch (K2) is turned on under the control of the ground control command; The negative poles of the power supply on the arrow and the ground power supply are connected to the negative pole of the dual-control solenoid valve, and the peak elimination circuit is connected between the positive and negative poles of the dual-control solenoid valve to eliminate the counter electromotive force generated at the moment of power-off of the dual-control solenoid valve. 2. The dual-control isolating circuit for liquid carrier rocket solenoid valve rocket and ground according to claim 1, characterized in that: the first isolating circuit is a diode or two diodes arranged in parallel. 3. The dual-control isolation circuit for the electromagnetic valve of the liquid launch vehicle according to claim 1 or 2, wherein the second isolation circuit is a diode or two diodes arranged in parallel. 4. The dual-control isolating circuit for the electromagnetic valve of the liquid carrier rocket according to claim 1 or 2, wherein the structure of the first isolating circuit is the same as that of the second isolating circuit. 5. The double-control isolation circuit for liquid carrier rocket electromagnetic valve according to claim 1 or 2, characterized in that: the peak-suppressing circuit includes a resistor R and a diode V5, and one end of the resistor R is connected to the positive pole of the dual-control electromagnetic valve. The other end is connected to the negative pole of the diode V5, and the positive pole of the diode V5 is connected to the negative pole of the dual control solenoid valve. 6. The dual-control isolation circuit for the liquid carrier rocket solenoid valve rocket and ground according to claim 1 or 2, wherein the dual-control solenoid valve is an rocket engine solenoid valve.