Constant-pressure-difference anti-explosion flow adjusting device for high-temperature and low-temperature fuel oil

Abstract

The invention discloses a constant-pressure-difference anti-explosion flow adjusting device for high and low temperature fuel oil, which belongs to the technical field of flow adjusting devices, adopts a split structure, separates a proportional pilot valve with an electrical control part from a main valve, and improves the flow adjusting efficiency. The influence of high-temperature and low-temperature fuel oil on an electrical part of the proportional pilot valve through heat conduction when the main valve works is reduced, normal work of the proportional pilot valve is ensured, the temperature of a working medium can reach-40 DEG C to 150 DEG C, and the problems that in the prior art, the temperature range of an explosion-proof device used for fuel oil flow adjustment is generally-20 DEG C to 80 DEG C, and the temperature of the explosion-proof device is too high are solved. The technical problem that the working condition of a fuel medium with the temperature span ranging from-40 DEG C to 150 DEG C cannot be met is solved, the main valve and the pilot valve are each provided with a displacement sensor, a closed-loop system is formed by the displacement sensors and the pilot valve, and good adjusting precision can be obtained in uncompensated flow adjusting.

Description

Technical Field

[0001] The invention belongs to the technical field of flow regulating devices, and in particular relates to a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels. Background Art

[0002] Flow control devices are widely used in mechanical hydraulic systems. They are mainly used to adjust the flow at a specific location according to demand. In many industrial and civil applications, the flow needs to be adjusted to a suitable range according to specific needs. In some mechanical equipment, if the flow is too large or too small, it may cause damage or shutdown of the mechanical equipment.

[0003] At present, the explosion-proof devices used for fuel flow regulation are mostly integrated with the proportional servo mechanism and the main valve body, and the temperature range is generally -20 to 80°C. For the temperature span of -40 to 150°C for fuel explosion-proof flow regulation devices, the current flow regulation devices cannot meet the requirements. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels, so as to solve the technical problem that the explosion-proof device for fuel flow regulation in the prior art cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel comprises a main valve and a proportional pilot valve of split design, the proportional pilot valve is connected to the main valve, and displacement sensors are arranged on the proportional pilot valve and the main valve to form a closed-loop control system.

[0007] Preferably, the main valve includes a pilot pressure reducing valve arranged on one side of the inlet of the valve body, and a proportional flow cartridge valve arranged on the other side which is connected to the outlet of the pilot pressure reducing valve. A pilot oil supply mounting plate is arranged on the proportional flow cartridge valve, and the pilot oil supply mounting plate is connected to the proportional pilot valve through an oil pipe.

[0008] Preferably, the displacement sensor is installed on the top of the proportional flow cartridge valve and connected to the displacement sensor arranged inside the proportional pilot valve to form a closed-loop control system.

[0009] Preferably, a cover plate is provided above the pilot-operated pressure reducing valve, and a pressure regulating handle for manually setting the pressure of the pilot-operated pressure reducing valve is provided on the cover plate.

[0010] Preferably, a fluorosilicone rubber sealing ring resistant to high and low temperatures is used inside the main valve.

[0011] Preferably, a direct-acting relief valve is also arranged on one side of the main valve.

[0012] Preferably, the proportional pilot valve is fixed on a pilot valve mounting plate, and the pilot valve mounting plate is connected to the main valve via an oil pipe.

[0013] Preferably, the temperature of the working medium in the device is -40 to 150°C.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, which adopts a split structure to separate the proportional pilot valve with an electrical control part from the main valve, thereby reducing the influence of high and low temperature fuel on the electrical part of the proportional pilot valve through heat conduction when the main valve is working, ensuring the normal operation of the proportional pilot valve, and making the working medium temperature reach -40 to 150°C, thereby solving the technical problem that the explosion-proof device for fuel flow regulation in the prior art generally has a temperature range of -20 to 80°C and cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C. In addition, both the main valve and the pilot valve are equipped with displacement sensors to form a closed-loop system with the pilot valve, so as to achieve better regulation accuracy in non-compensated flow regulation.

[0016] Furthermore, a pilot pressure reducing valve is arranged before the proportional flow cartridge valve, which can automatically adjust the opening of the pressure reducing valve according to the pressure difference before and after the flow valve to ensure that the pressure difference before and after the flow valve is within a constant range, so that it is always in good working conditions.

[0017] Furthermore, the pressure of the pilot-operated pressure reducing valve can be adjusted by a manual device, so that the flow regulating device has a wider adjustment range to meet the flow regulation requirements under different pressure difference conditions.

[0018] Furthermore, a direct-acting relief valve is arranged in front of the main valve, and when the main valve is stuck or abnormal, the regulating device is protected from pressure relief to avoid dangerous situations such as overpressure.

[0019] Furthermore, a high and low temperature resistant fluorosilicone rubber sealing ring that can be used for fuel is used, and the temperature resistance of the sealing material can meet the operating temperature requirement of -40 to 150°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the principle diagram of the flow regulating device of the present invention;

[0021] Figure 2 is a cross-sectional view of the flow regulating device of the present invention;

[0022] Figure 3 It is a view of the flow regulating device of the present invention taken along the AA direction;

[0023] Figure 4 It is a top view of the flow regulating device of the present invention.

[0024] Among them: 1-valve body; 2-cover plate; 3-pilot pressure reducing valve; 4-proportional flow cartridge valve; 5-direct-acting overflow valve; 6-pilot oil supply mounting plate; 7-pilot valve mounting plate; 8-proportional pilot valve; 9-pressure regulating handle; 10-displacement sensor. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0028] In order to meet the flow simulation difficulties of fuel accessories during high and low temperature tests and solve the shortcomings of the small temperature span of the existing flow regulating device, we can only design and develop a special high and low temperature resistant fuel explosion-proof flow regulating device by ourselves to meet the needs of fuel accessory debugging.

[0029] See also Figure 2The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, comprising a main valve and a proportional pilot valve 8 of split design. The proportional pilot valve 8 is connected to the main valve and adopts a split structure to separate the proportional pilot valve with an electrical control part from the main valve, thereby reducing the influence of high and low temperature fuel on the electrical part of the proportional pilot valve through heat conduction when the main valve is working, ensuring the normal operation of the proportional pilot valve, and making the working medium temperature reach -40 to 150°C, solving the technical problem that the explosion-proof device for fuel flow regulation in the prior art generally has a temperature range of -20 to 80°C and cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C, and displacement sensors 10 are provided on the proportional pilot valve 8 and the main valve, which are interconnected to form a closed-loop control system; better regulation accuracy can be achieved in non-compensated flow regulation.

[0030] In some embodiments, see Figure 2 The main valve includes a valve body 1, a pilot pressure reducing valve 3 is arranged on one side of the inlet of the valve body 1, and a proportional flow cartridge valve 4 is arranged on the other side to communicate with the outlet of the pilot pressure reducing valve 3. A pilot oil supply mounting plate 6 is arranged on the proportional flow cartridge valve 4, and the pilot oil supply mounting plate 6 is connected to the proportional pilot valve 8 through an oil pipe. A pilot pressure reducing valve 3 is arranged in front of the proportional flow cartridge valve 4, and the opening of the pilot pressure reducing valve 3 can be automatically adjusted according to the pressure difference before and after the proportional flow cartridge valve 4 to ensure that the pressure difference before and after the proportional flow cartridge valve 4 is within a constant range, so that it is always in good working conditions.

[0031] In some embodiments, see Figure 2 The displacement sensor 10 is installed on the top of the proportional flow cartridge valve 4, and is connected to the displacement sensor 10 arranged inside the proportional pilot valve 8. Both the main valve and the proportional pilot valve 8 are equipped with the displacement sensor 10 to form a closed-loop system, which can achieve better regulation accuracy in uncompensated flow regulation.

[0032] In some embodiments, see Figure 3 A cover plate 2 is arranged above the pilot pressure reducing valve 3, and a pressure regulating handle 9 for manually setting the pressure of the pilot pressure reducing valve 3 is arranged on the cover plate 2; the pressure of the pilot pressure reducing valve 3 is adjusted by a manual device so that the flow regulating device has a wider adjustment range to meet the flow regulation requirements under different pressure difference conditions.

[0033] In some embodiments, see Figure 2 The main valve is internally provided with a high and low temperature resistant fluorosilicone rubber sealing ring, which can be used for fuel, and the temperature resistance of the sealing material can meet the operating temperature requirement of -40 to 150°C.

[0034] In some embodiments, see Figure 4A direct-acting relief valve 5 is also arranged on one side of the main valve; when the main valve is stuck or abnormal, the regulating device is protected from pressure relief to avoid dangerous situations such as overpressure.

[0035] In some embodiments, the proportional pilot valve 8 is fixed on the pilot valve mounting plate 7, and the pilot valve mounting plate 7 is connected to the main valve through an oil pipe.

[0036] See also Figure 1 The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels, and its working principle is as follows: the flow regulating device adopts an integrated block design, the pressure reducing valve 3 and the proportional flow valve 4 adopt a plug-in type, and the direct-acting overflow valve 5 adopts a plate installation, which is installed on the valve body 1 and has a compact structure.

[0037] The fuel enters the regulating device through the inlet, and enters the proportional flow valve 4 after being reduced in pressure by the pressure reducing valve 3. The pressure reducing valve 3 can automatically adjust the opening of the pressure reducing valve according to the pressure difference before and after the flow valve to ensure that the pressure difference before and after the proportional flow valve 4 is within a constant range, so that it is always in good working conditions. The pressure of the pressure reducing valve 3 can be adjusted by the pressure regulating handle 9, so that the flow regulating device has a wider adjustment range to meet the flow regulation requirements under different pressure difference conditions.

[0038] The proportional flow valve 4 adopts a split structure, separating the explosion-proof proportional pilot valve part with the electrical control part from the main valve. The given control current drives the pilot valve to operate, and then controls the main valve to adjust the flow. Both the main valve and the pilot valve are equipped with displacement sensors, forming a closed-loop system with the pilot valve, which can achieve better adjustment accuracy in non-compensated flow regulation.

[0039] Embodiment 1:

[0040] Develop a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels. The main technical requirements are as follows:

[0041] Working medium: No. 3 jet fuel (GB6537-2018);

[0042] Fuel cleanliness: GJB420B-6 grade;

[0043] Working temperature range: -40~150℃;

[0044] Pilot oil supply pressure: 9±0.2MPa;

[0045] The purpose of the present invention is to provide a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels to meet the requirements of fuel accessories debugging.

[0046] See also Figure 2The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, comprising a main valve and a proportional pilot valve 8 of split design. The proportional pilot valve 8 is connected to the main valve and adopts a split structure to separate the proportional pilot valve with an electrical control part from the main valve, thereby reducing the influence of high and low temperature fuel on the electrical part of the proportional pilot valve through heat conduction when the main valve is working, ensuring the normal operation of the proportional pilot valve, and making the working medium temperature reach -40 to 150°C, solving the technical problem that the explosion-proof device for fuel flow regulation in the prior art generally has a temperature range of -20 to 80°C and cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C, and displacement sensors 10 are arranged on the proportional pilot valve 8 and the main valve to form a closed-loop control system; the main valve and the proportional pilot valve 8 are both equipped with displacement sensors to form a closed-loop system with the proportional pilot valve 8, so that better regulation accuracy can be achieved in non-compensated flow regulation.

[0047] Embodiment 2:

[0048] Develop a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels. The main technical requirements are as follows:

[0049] Working medium: No. 3 jet fuel (GB6537-2018);

[0050] Fuel cleanliness: GJB420B-6 grade;

[0051] Working temperature range: -40~150℃;

[0052] Pilot oil supply pressure: 9±0.2MPa;

[0053] The purpose of the present invention is to provide a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels to meet the requirements of fuel accessories debugging.

[0054] See also Figure 2 The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, comprising a main valve and a proportional pilot valve 8 of split design. The proportional pilot valve 8 is connected to the main valve and adopts a split structure to separate the proportional pilot valve with an electrical control part from the main valve, thereby reducing the influence of high and low temperature fuel on the electrical part of the proportional pilot valve through heat conduction when the main valve is working, ensuring the normal operation of the proportional pilot valve, and making the working medium temperature reach -40 to 150°C, solving the technical problem that the explosion-proof device for fuel flow regulation in the prior art generally has a temperature range of -20 to 80°C and cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C, and displacement sensors 10 are arranged on the proportional pilot valve 8 and the main valve to form a closed-loop control system; the main valve and the proportional pilot valve 8 are both equipped with displacement sensors to form a closed-loop system with the proportional pilot valve 8, so that better regulation accuracy can be achieved in non-compensated flow regulation.

[0055] The main valve comprises a valve body 1, a pilot pressure reducing valve 3 is arranged on one side of the inlet of the valve body 1, a proportional flow cartridge valve 4 is arranged on the other side and is connected to the bottom of the pilot pressure reducing valve 3, a pilot oil supply mounting plate 6 is arranged on the proportional flow cartridge valve 4, and the pilot oil supply mounting plate 6 is connected to the proportional pilot valve 8 through an oil pipe. The pilot pressure reducing valve 3 is arranged in front of the proportional flow cartridge valve 4, and the opening of the pilot pressure reducing valve 3 can be automatically adjusted according to the pressure difference before and after the proportional flow cartridge valve 4 to ensure that the pressure difference before and after the proportional flow cartridge valve 4 is within a constant range, so that it is always in good working conditions.

[0056] Embodiment 3:

[0057] Develop a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels. The main technical requirements are as follows:

[0058] Working medium: No. 3 jet fuel (GB6537-2018);

[0059] Fuel cleanliness: GJB420B-6 grade;

[0060] Working temperature range: -40~150℃;

[0061] Pilot oil supply pressure: 9±0.2MPa;

[0062] The purpose of the present invention is to provide a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels to meet the requirements of fuel accessories debugging.

[0063] See also Figure 2 The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, comprising a main valve and a proportional pilot valve 8 of split design. The proportional pilot valve 8 is connected to the main valve and adopts a split structure to separate the proportional pilot valve with an electrical control part from the main valve, thereby reducing the influence of high and low temperature fuel on the electrical part of the proportional pilot valve through heat conduction when the main valve is working, ensuring the normal operation of the proportional pilot valve, and making the working medium temperature reach -40 to 150°C, solving the technical problem that the explosion-proof device for fuel flow regulation in the prior art generally has a temperature range of -20 to 80°C and cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C, and displacement sensors 10 are arranged on the proportional pilot valve 8 and the main valve to form a closed-loop control system; the main valve and the proportional pilot valve 8 are both equipped with displacement sensors to form a closed-loop system with the proportional pilot valve 8, so that better regulation accuracy can be achieved in non-compensated flow regulation.

[0064] The displacement sensor 10 is installed on the top of the proportional flow cartridge valve 4, and is connected to the displacement sensor 10 arranged inside the proportional pilot valve 8. Both the main valve and the proportional pilot valve 8 are equipped with the displacement sensor 10, forming a closed-loop system with the proportional pilot valve 8, so as to achieve better regulation accuracy in uncompensated flow regulation.

[0065] A cover plate 2 is arranged above the pilot pressure reducing valve 3, and a pressure regulating handle 9 for manually setting the pressure of the pilot pressure reducing valve 3 is arranged on the cover plate 2; the pressure of the pilot pressure reducing valve 3 is adjusted by a manual device so that the flow regulating device has a wider adjustment range to meet the flow regulation requirements under different pressure difference conditions.

[0066] Embodiment 4:

[0067] Develop a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels. The main technical requirements are as follows:

[0068] Working medium: No. 3 jet fuel (GB6537-2018);

[0069] Fuel cleanliness: GJB420B-6 grade;

[0070] Working temperature range: -40~150℃;

[0071] Pilot oil supply pressure: 9±0.2MPa;

[0072] The purpose of the present invention is to provide a constant pressure difference explosion-proof flow regulating device for high and low temperature fuels to meet the requirements of fuel accessories debugging.

[0073] See also Figure 2 The present application discloses a constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, comprising a main valve and a proportional pilot valve 8 of split design. The proportional pilot valve 8 is connected to the main valve and adopts a split structure to separate the proportional pilot valve with an electrical control part from the main valve, thereby reducing the influence of high and low temperature fuel on the electrical part of the proportional pilot valve through heat conduction when the main valve is working, ensuring the normal operation of the proportional pilot valve, and making the working medium temperature reach -40 to 150°C, solving the technical problem that the explosion-proof device for fuel flow regulation in the prior art generally has a temperature range of -20 to 80°C and cannot meet the working conditions of the fuel medium with a temperature span of -40 to 150°C, and displacement sensors 10 are arranged on the proportional pilot valve 8 and the main valve to form a closed-loop control system; the main valve and the proportional pilot valve 8 are both equipped with displacement sensors to form a closed-loop system with the proportional pilot valve 8, so that better regulation accuracy can be achieved in non-compensated flow regulation.

[0074] The displacement sensor 10 is installed on the top of the proportional flow cartridge valve 4, and is connected to the displacement sensor 10 arranged inside the proportional pilot valve 8. Both the main valve and the proportional pilot valve 8 are equipped with the displacement sensor 10, forming a closed-loop system with the proportional pilot valve 8, so as to achieve better regulation accuracy in uncompensated flow regulation.

[0075] A cover plate 2 is arranged above the pilot pressure reducing valve 3, and a pressure regulating handle 9 for manually setting the pressure of the pilot pressure reducing valve 3 is arranged on the cover plate 2; the pressure of the pilot pressure reducing valve 3 is adjusted by a manual device so that the flow regulating device has a wider adjustment range to meet the flow regulation requirements under different pressure difference conditions.

[0076] The main valve is internally provided with a high and low temperature resistant fluorosilicone rubber sealing ring, which can be used for fuel, and the temperature resistance of the sealing material can meet the operating temperature requirement of -40 to 150°C.

[0077] A direct-acting relief valve 5 is also arranged on one side of the main valve; when the main valve is stuck or abnormal, the regulating device is protected from pressure relief to avoid dangerous situations such as overpressure.

[0078] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel, characterized in that: The invention comprises a main valve and a proportional pilot valve (8) of split design, wherein the proportional pilot valve (8) is connected to the main valve, and displacement sensors (10) are arranged on both the proportional pilot valve (8) and the main valve, thereby forming a closed-loop control system.

2. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 1, characterized in that: The main valve comprises a valve body (1), a pilot pressure reducing valve (3) is arranged on one side of the inlet of the valve body (1), and a proportional flow cartridge valve (4) is arranged on the other side, which is connected to the outlet of the pilot pressure reducing valve (3), and a pilot oil supply mounting plate (6) is arranged on the proportional flow cartridge valve (4), and the pilot oil supply mounting plate (6) is connected to the proportional pilot valve (8) through an oil pipe.

3. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 2, characterized in that: The displacement sensor (10) is installed on the top of the proportional flow cartridge valve (4) and is connected to the displacement sensor (10) arranged inside the proportional pilot valve (8) to form a closed-loop control system.

4. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 2, characterized in that: A cover plate (2) is arranged above the pilot-operated pressure reducing valve (3), and a pressure regulating handle (9) for manually setting the pressure of the pilot-operated pressure reducing valve (3) is arranged on the cover plate (2).

5. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 1, characterized in that: The main valve is internally provided with a fluorosilicone rubber sealing ring which is resistant to high and low temperatures.

6. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 1, characterized in that: A direct-acting overflow valve (5) is also arranged on one side of the main valve.

7. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 1, characterized in that: The proportional pilot valve (8) is fixed on a pilot valve mounting plate (7), and the pilot valve mounting plate (7) is connected to the main valve via an oil pipe.

8. A constant pressure difference explosion-proof flow regulating device for high and low temperature fuel according to claim 1, characterized in that: The working medium temperature in the device is -40~150℃.

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