Hydraulic pile-up valve applied to LNG (Liquefied Natural Gas) whole vehicle system

Abstract

The utility model relates to the field of hydraulic control valves, in particular to a hydraulic pile-up valve applied to an LNG (Liquefied Natural Gas) whole vehicle system. Comprising an integrated valve body, a port P connected with an oil pump and a port T connected with a hydraulic oil tank are formed in the front side of the integrated valve body, a port A and a port B connected with a driving mechanism are formed in the rear side of the integrated valve body, an overflow valve and a hydraulic control reversing valve are arranged on the left side of the integrated valve body, and an electromagnetic bypass valve and an electromagnetic reversing valve are arranged on the right side of the integrated valve body. The left side of the port P is communicated with an overflow valve through an overflow channel arranged in the integrated valve body, and the overflow valve is communicated with the port T through an overflow channel arranged in the integrated valve body; the right side of the port P is communicated with an electromagnetic bypass valve through a channel arranged in the integrated valve body, and the electromagnetic bypass valve is communicated with the port T through a channel arranged in the integrated valve body; the device is high in integration degree and small in occupied space, and can be directly put into installation and use on an LNG whole vehicle system, reciprocating motion of a piston of a driving mechanism of the LNG booster pump is achieved, and safety of a hydraulic oil way is protected.

Description

Technical field:

[0001] The utility model relates to the field of hydraulic control valves, in particular to a hydraulic integrated valve applied to an LNG vehicle system. Background technology:

[0002] At present, in the vehicle-mounted LNG system, the low-temperature liquid in the LNG bottle needs to be pressurized by an LNG booster pump, and then the low-temperature liquid is gasified, and then supplied to the vehicle engine for use, in order to obtain stronger power and achieve the purpose of energy conservation and emission reduction. Among them, the structure of the LNG booster pump mainly includes a driving mechanism, a compression mechanism and a gasification component. The driving mechanism generally adopts a liquid drive form, and uses hydraulic oil to drive the piston to reciprocate to achieve liquid pressing and pumping. At present, the overflow valve, proportional valve, reversing valve and other components in the hydraulic system are all separately set and connected by pipelines. The pipeline connection is complex, the integration level is low, the space occupied is large, and the on-site assembly efficiency is low, which can no longer meet the use requirements of the vehicle-mounted LNG system.

[0003] In summary, the integration of hydraulic valves of the drive mechanism in the LNG vehicle system has become a technical problem that needs to be solved urgently in the industry. Utility model content:

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a hydraulic integrated valve applied to an LNG vehicle system, which solves the problems of separate arrangements of components such as overflow valves, proportional valves, and reversing valves in previous hydraulic systems, low integration, large occupied space, and low assembly efficiency.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A hydraulic integrated valve used in an LNG vehicle system comprises an integrated valve body, wherein the front side of the integrated valve body is provided with a P port connected to an oil pump and a T port connected to a hydraulic oil tank, the rear side of the integrated valve body is provided with an A port and a B port connected to a driving mechanism, the left side of the integrated valve body is provided with a relief valve and a hydraulically controlled reversing valve, the right side of the integrated valve body is provided with an electromagnetic bypass valve and an electromagnetic reversing valve, the left side of the P port is connected to the relief valve via an overflow channel arranged in the integrated valve body, and the relief valve is further connected to the T port via an overflow channel arranged in the integrated valve body; the right side of the P port is connected to the electromagnetic bypass valve via a channel arranged in the integrated valve body, and the electromagnetic bypass valve is further connected to the T port via a channel arranged in the integrated valve body; the rear side of the P port is connected to the electromagnetic reversing valve via a delivery channel arranged in the integrated valve body, the electromagnetic reversing valve is connected to the hydraulically controlled reversing valve, and the hydraulically controlled reversing valve is connected to the A port and the B port.

[0007] The relief valve is used to open when the pressure is too high so that the hydraulic oil in the P port can directly return to the T port and the oil tank through the relief valve.

[0008] The electromagnetic bypass valve adopts a pilot electromagnetic adjustable proportional valve.

[0009] When the electromagnetic bypass valve is fully opened, the hydraulic oil in the P port directly returns to the T port and the oil tank through the electromagnetic bypass valve.

[0010] The electromagnetic bypass valve is used to adjust the flow of hydraulic oil entering port A when it is not fully opened.

[0011] The electromagnetic reversing valve and the hydraulically controlled reversing valve cooperate to control the pressing or withdrawing of hydraulic oil.

[0012] A pressure sensor is provided at the P port.

[0013] The integrated valve body is made of metal material or non-metal material and is integrally formed.

[0014] The utility model adopts the above scheme and has the following advantages:

[0015] By setting an integrated valve body, the overflow valve, the electromagnetic bypass valve, the electromagnetic reversing valve and the hydraulic control reversing valve are integrated into one body, the front side of the integrated valve body is provided with a P port connected to the oil pump and a T port connected to the hydraulic oil tank, the rear side of the integrated valve body is provided with an A port and a B port connected to the drive mechanism, and a channel is arranged in the integrated valve body to communicate, when the electromagnetic reversing valve is not energized, the P port is connected to the A port of the hydraulic control reversing valve through the electromagnetic bypass valve, and the B port of the hydraulic control reversing valve is connected to the T port, and it is in the withdrawal state at this time; when the electromagnetic reversing valve is .... The port is connected to the B port of the hydraulic control reversing valve through the electromagnetic bypass valve, the electromagnetic reversing valve, and the A port of the hydraulic control reversing valve is connected to the T port, and it is in a pressurized liquid state at this time; the overflow valve can be opened to play a role of safe overflow when the pressure is too large, and it can play a role of pressure relief when the electromagnetic bypass valve is fully opened, and it can play a role of regulating flow when the electromagnetic bypass valve is not fully opened; the utility model has a high degree of integration and occupies a small space. It can be directly installed and used on the LNG vehicle system to realize the reciprocating motion of the piston of the driving mechanism of the LNG boosting pump and protect the safety of the hydraulic oil circuit. Description of the drawings:

[0016] Figure 1 It is a front three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a rear view structural schematic diagram of the utility model.

[0018] Figure 3 It is a schematic diagram of the top structure of the utility model.

[0019] Figure 4 for Figure 3 Schematic diagram of the CC cross-sectional structure.

[0020] Figure 5for Figure 3 Schematic diagram of DD cross-sectional structure.

[0021] Figure 6 It is a schematic diagram of the hydraulic principle of the utility model in the withdrawal state.

[0022] Figure 7 It is a schematic diagram of the hydraulic principle of the utility model in the liquid pressing state.

[0023] In the figure, 1. integrated valve body, 2. P port, 3. T port, 4. A port, 5. B port, 6. overflow valve, 7. hydraulically controlled reversing valve, 8. electromagnetic bypass valve, 9. electromagnetic reversing valve, 10. overflow channel, 11. delivery channel, 12. pressure sensor. Specific implementation method:

[0024] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0025] like Figure 1-7 As shown, a hydraulic integrated valve used in an LNG vehicle system includes an integrated valve body 1, wherein the front side of the integrated valve body 1 is provided with a P port 2 connected to an oil pump and a T port 3 connected to a hydraulic oil tank, the rear side of the integrated valve body 1 is provided with an A port 4 and a B port 5 connected to a drive mechanism, the left side of the integrated valve body 1 is provided with a relief valve 6 and a hydraulically controlled reversing valve 7, the right side of the integrated valve body 1 is provided with an electromagnetic bypass valve 8 and an electromagnetic reversing valve 9, the left side of the P port 2 is connected to the overflow channel 10 provided in the integrated valve body 1 It is connected with the overflow valve 6, and the overflow valve 6 is connected with the T port 3 via the overflow channel 10 provided in the integrated valve body 1; the right side of the P port 2 is connected with the electromagnetic bypass valve 8 via the channel provided in the integrated valve body 1, and the electromagnetic bypass valve 8 is connected with the T port 3 via the channel provided in the integrated valve body 1; the rear side of the P port 2 is connected with the electromagnetic reversing valve 9 via the delivery channel 11 provided in the integrated valve body 1, the electromagnetic reversing valve 9 is connected with the hydraulically controlled reversing valve 7, and the hydraulically controlled reversing valve 7 is connected with the A port 4 and the B port 5.

[0026] The relief valve 6 is used to open when the pressure is too high, so that the hydraulic oil in the P port 2 directly returns to the T port 3 and the oil tank through the relief valve 6, thereby playing an overflow protection role.

[0027] The electromagnetic bypass valve 8 is a pilot electromagnetic adjustable proportional valve.

[0028] When an emergency situation occurs and pressure relief is required immediately, the electromagnetic bypass valve 8 is fully opened, and the hydraulic oil in the P port 2 is directly returned to the T port 3 and the oil tank through the electromagnetic bypass valve 8, and the pressure is immediately relieved to protect the safety of the entire system. At this time, the drive mechanism does not work.

[0029] When the liquid is pressed, the electromagnetic bypass valve 8 is not fully opened. By controlling the valve ratio and flow rate, the flow rate of the hydraulic oil entering the A port 4 is adjusted to play a role in buffering and preventing cylinder collision.

[0030] The electromagnetic reversing valve 9 and the hydraulically controlled reversing valve 7 cooperate to control the pressure or withdrawal of hydraulic oil.

[0031] The P port 2 is provided with a pressure sensor 12 .

[0032] The integrated valve body 1 is made of metal or non-metal material and is integrally formed.

[0033] Working principle:

[0034] In the withdrawing state, the electromagnetic reversing valve 9 is not energized, the P port 2 is connected to the A port 4 of the hydraulic control reversing valve 7 through the electromagnetic bypass valve 8, and the B port 5 of the hydraulic control reversing valve 7 is connected to the T port 3;

[0035] In the hydraulic pressure state, the electromagnetic reversing valve 9 is energized, the P port 2 is connected to the B port 5 of the hydraulic control reversing valve 7 through the electromagnetic bypass valve 8 and the electromagnetic reversing valve 9, and the A port 4 of the hydraulic control reversing valve 7 is connected to the T port 3;

[0036] When the pressure sensor 12 detects that the pressure is too high, the relief valve 6 opens, and the P port 2 is connected to the T port 3 through the relief valve 6. The hydraulic oil in the P port 2 can directly return to the T port 3 and the oil tank through the relief valve 6, which plays an overflow protection role;

[0037] When an emergency situation occurs and pressure relief is required immediately, the electromagnetic bypass valve 8 is fully opened, and the P port 2 is connected to the T port 3 through the electromagnetic bypass valve 8. The hydraulic oil in the P port 2 can be directly returned to the T port 3 and the oil tank through the electromagnetic bypass valve 8 to relieve pressure immediately, thereby protecting the safety of the entire system.

[0038] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0039] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A hydraulic integrated valve used in an LNG vehicle system, characterized in that: It includes an integrated valve body, wherein the front side of the integrated valve body is provided with a P port connected to the oil pump and a T port connected to the hydraulic oil tank, the rear side of the integrated valve body is provided with an A port and a B port connected to the driving mechanism, the left side of the integrated valve body is provided with an overflow valve and a hydraulically controlled reversing valve, and the right side of the integrated valve body is provided with an electromagnetic bypass valve and an electromagnetic reversing valve, the left side of the P port is connected with the overflow valve via an overflow channel arranged in the integrated valve body, and the overflow valve is further connected with the T port via an overflow channel arranged in the integrated valve body; the right side of the P port is connected with the electromagnetic bypass valve via a channel arranged in the integrated valve body, and the electromagnetic bypass valve is further connected with the T port via a channel arranged in the integrated valve body; the rear side of the P port is connected with the electromagnetic reversing valve via a delivery channel arranged in the integrated valve body, the electromagnetic reversing valve is connected with the hydraulically controlled reversing valve, and the hydraulically controlled reversing valve is connected with the A port and the B port.

2. According to claim 1, a hydraulic integrated valve used in an LNG vehicle system is characterized in that: The relief valve is used to open when the pressure is too high so that the hydraulic oil in the P port can directly return to the T port and the oil tank through the relief valve.

3. According to claim 1, a hydraulic integrated valve used in an LNG vehicle system is characterized in that: The electromagnetic bypass valve adopts a pilot electromagnetic adjustable proportional valve.

4. The hydraulic integrated valve used in the LNG vehicle system according to claim 3 is characterized in that: When the electromagnetic bypass valve is fully opened, the hydraulic oil in the P port directly returns to the T port and the oil tank through the electromagnetic bypass valve.

5. The hydraulic integrated valve used in the LNG vehicle system according to claim 3 is characterized in that: The electromagnetic bypass valve is used to adjust the flow of hydraulic oil entering port A when it is not fully opened.

6. The hydraulic integrated valve used in the LNG vehicle system according to claim 1 is characterized in that: The electromagnetic reversing valve and the hydraulically controlled reversing valve cooperate to control the pressing or withdrawing of hydraulic oil.

7. The hydraulic integrated valve used in the LNG vehicle system according to claim 1, characterized in that: A pressure sensor is provided at the P port.

8. The hydraulic integrated valve used in the LNG vehicle system according to claim 1 is characterized in that: The integrated valve body is made of metal material or non-metal material and is integrally formed.

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