A small GVU valve box

Abstract

The utility model provides a kind of small GVU valve box, including box, gas supply passage being arranged in box and valve group being arranged on gas supply passage, gas supply passage is respectively connected with diffusion branch one and diffusion branch two on both ends of valve group, and electromagnetic valve is respectively equipped on diffusion branch one and diffusion branch two.The utility model adopts modularization design, valve piece, pipeline etc. are highly integrated in a box, compact structure, layout simplification;Through integrated design and reduce external pipeline connection, reduce sealing point and leakage hidden danger, improve the reliability of gas supply system;By being equipped with diffusion branch respectively on both ends of valve group, when engine does not work, after valve group is closed, not only residual gas between valve group and gas inlet can be discharged, but also residual gas between valve group and gas outlet can be discharged, further guarantee system safety.

Description

Technical Field

[0001] This utility model relates to the field of marine power technology, and in particular to a GVU valve box. Background Technology

[0002] As marine propulsion systems develop towards cleaner and more efficient directions, natural gas, as a low-carbon and environmentally friendly alternative fuel, is increasingly being used in the field of small marine engines. Marine engines place stringent requirements on the pressure stability, safety, and spatial adaptability of the gas supply system, necessitating precise pressure reduction and stable delivery of high-pressure gas while mitigating the risk of leakage.

[0003] Existing gas supply systems for small marine natural gas engines mostly employ a decentralized valve and pipeline connection structure, which has the following shortcomings: First, low integration, with valves, filters, pressure stabilizing components, etc., scattered and occupying a large space, making it difficult to adapt to the limited installation environment of ships; second, insufficient pressure regulation accuracy and slow response speed, failing to match engine load changes in a timely manner, affecting the stability of power output; third, numerous sealing points and complex external pipeline connections, resulting in a high risk of leakage, and a lack of effective leakage protection and emission mechanisms, thus requiring improved safety; fourth, cumbersome maintenance operations, requiring the disassembly of multiple connecting components, consuming manpower and time costs.

[0004] Therefore, developing a highly integrated, safe, reliable, precisely adjustable, and easy-to-maintain gas supply control device is crucial to meeting the needs of small marine natural gas engines and promoting the development of marine gas power technology.

[0005] Utility model patent CN222527428U, published on February 25, 2025, discloses a GVU valve box, including a cylinder. A cover plate and a tray are detachably connected to the upper and lower ends of the cylinder, respectively. Multiple support frames are provided at the lower end of the tray to support it. A receiving space is provided on the tray. A ventilation inlet pipe and a ventilation outlet pipe, communicating with the receiving space, are provided on the side wall of the tray. A gas inlet and a gas outlet are respectively provided inside the ventilation inlet pipe and the ventilation outlet pipe. The receiving space contains a horizontally arranged arc-shaped internal main pipe. The two ends of the internal main pipe are connected to the gas inlet and the gas outlet, respectively. External gas enters the internal main pipe through the gas inlet and is then discharged from the internal main pipe for use in the gas supply system. The hollow space inside the cylinder is connected to the receiving space. A conical bottom plate is provided on the lower end face of the tray. However, this utility model cannot completely dissipate the residual natural gas in the pipes at both ends of the valve assembly after the valve assembly stops working, which may easily lead to safety hazards over time. Summary of the Invention

[0006] To address the aforementioned technical problems, this utility model proposes a small GVU valve box to solve the problem that, in the prior art, after the valve assembly in the small GVU valve box of a marine natural gas engine stops working, the residual natural gas at both ends of the valve assembly can easily cause safety hazards over a long period of time.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A small GVU valve box includes a housing, an air supply passage disposed within the housing, and a valve assembly disposed on the air supply passage. A vent branch one and a vent branch two are respectively connected to the air supply passage at both ends of the valve assembly, and each vent branch one and vent branch two is equipped with a solenoid valve. This utility model adopts a modular design, highly integrating valves, pipelines, etc., into a single housing, resulting in a compact structure and simplified layout. Through integrated design and reduced external pipeline connections, sealing points and leakage risks are reduced, improving the reliability of the air supply system. By providing vent branches at both ends of the valve assembly, when the engine is not running and the valve assembly is closed, residual gas between the valve assembly and the gas inlet can be discharged, as well as residual gas between the valve assembly and the gas outlet; further ensuring system safety.

[0008] Furthermore, one end of the gas supply passage is connected to the gas inlet on the housing, and the other end is connected to the gas outlet on the housing; the valve assembly includes a pressure regulating valve installed on the gas supply passage.

[0009] Furthermore, the front end of the pressure regulating valve is connected to the gas inlet via a filter.

[0010] Furthermore, a flange connection block is provided between the filter and the pressure regulating valve. The flange connection block has two outlets. One outlet of the flange connection block is connected to the vent branch, and the other outlet is connected to the inlet of the pressure regulating valve through a hose.

[0011] Furthermore, one end of the vent branch is connected to the flange connecting block via a solenoid valve, and the other end extends out of the housing to form a vent port.

[0012] Furthermore, the valve assembly also includes a combined pressure regulating valve connected in series downstream of the pressure regulating valve.

[0013] Furthermore, a three-way connector is connected between the combined pressure regulating valve and the gas outlet, and one interface of the three-way connector is connected to the second vent branch.

[0014] Furthermore, one end of the second vent branch is connected to the three-way connector via the second solenoid valve, and the other end of the second vent branch extends out of the housing to form the second vent outlet.

[0015] Furthermore, the gas inlet includes an inner inlet pipe connected to the gas supply passage and an outer inlet pipe sleeved on the outside of the inner inlet pipe and fixed on the outside of the housing; the gas outlet includes an inner outlet pipe and an outer outlet pipe sleeved on the outside of the inner outlet pipe and fixed on the outside of the housing.

[0016] Furthermore, the enclosure is equipped with a ventilation port 1, a ventilation port 2, and a leak detection port.

[0017] The beneficial effects of this utility model are: 1. This utility model adopts a modular design, which highly integrates gas valves, pipelines, sensors and other components into a single box, resulting in a compact structure and simplified layout; 2. This utility model provides a vent, which is connected to the gas supply passage via a valve. When the engine is not running, the gas supply passage is disconnected and the valve is opened, allowing the residual natural gas to be discharged through the vent. 3. This utility model provides venting branches at both ends of the valve assembly. When the engine is not running, after the valve assembly is closed, it can not only discharge the residual gas between the valve assembly and the gas inlet, but also discharge the residual gas between the valve assembly and the gas outlet; thus further ensuring system safety. 4. The double-wall structure of each pipe opening in this utility model further prevents leakage and diffusion; 5. This utility model adopts an easy-to-open upper flange assembly, which reduces the number of personnel and time required for maintenance and lowers maintenance costs; 6. This utility model can quickly, stably, and accurately adjust the intake gas pressure of the engine, with a fast response speed, strong pressure stabilization performance, and high adjustment accuracy, and can well cope with changes in engine load. 7. This utility model reduces sealing points and leakage risks through integrated design and reduced external pipeline connections, thereby improving the reliability of the gas supply system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the control circuit of this utility model.

[0020] In the diagram: 1. Shell, 101. Gas inlet, 102. Gas outlet, 103. Vent 1, 104. Vent 2, 105. Vent 1, 106. Leak detection port, 107. Wiring harness outlet, 108. Vent 2, 2. Cover, 3. Flange connection block, 4. T-connector block, 5. Solenoid valve 2, 6. Combined pressure regulating valve, 7. Solenoid valve 1, 8. Filter, 9. Pressure regulating valve, 10. Vent 1. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 As shown in Embodiment 1 of this utility model, a small GVU valve box includes a housing 1 and a gas supply passage disposed within the housing 1. The housing 1 is provided with a gas inlet 101 and a gas outlet 102 connected to both ends of the gas supply passage. The gas outlet 102 is connected to the engine to supply gas to the engine. A valve assembly is provided on the gas supply passage for controlling the gas supply process. A vent branch one and a vent branch two are respectively connected to the gas supply passage located at both ends of the valve assembly. Figure 2 As shown, a venting branch one is connected to the gas supply passage between the gas inlet 101 and the valve group, and a venting branch two is connected to the gas supply passage between the valve group and the gas outlet 102. The venting branches one and two at both ends of the valve group are used to discharge excess gas remaining in the gas supply passage at both ends of the valve group through the two venting branches after gas supply is not required and the valve group stops working, so as to avoid safety hazards.

[0023] Solenoid valves are installed on venting branch one and venting branch two respectively, which are used to control venting branch one and venting branch two to close when the gas supply passage is working, and to open venting branch one and venting branch two when the gas supply passage is not working.

[0024] Furthermore, the valve assembly includes a pressure regulating valve 9 disposed on the gas supply passage between the gas inlet 101 and the gas outlet 102.

[0025] Example 2 differs from Example 1 in that, as Figure 2 As shown, the front end of the pressure regulating valve 9 is connected to the gas inlet 101 via the filter 8. In this embodiment, the front end of the pressure regulating valve 9 is connected to the filter 8 via a hose, and the filter 8 is connected to the gas inlet 101.

[0026] Among them, the pressure regulating valve 9 adopts the structure of existing technology.

[0027] Example 3 differs from Example 2 in that, as Figure 2 As shown, a flange connecting block 3 is provided between the filter 8 and the pressure regulating valve 9. The inlet of the flange connecting block 3 is connected to the outlet of the filter 8. The flange connecting block 3 has two outlets. One outlet of the flange connecting block 3 is connected to the vent branch, and the other outlet is connected to the hose mentioned above, thereby connecting to the inlet of the pressure regulating valve 9.

[0028] Furthermore, such as Figure 2 As shown, the housing 1 is provided with a vent port 105. One end of the vent branch is connected to the flange connecting block 3 via a solenoid valve 7, and the other end is connected to the vent port 105 on the housing 1. In this embodiment, one outlet of the flange connecting block 3 is connected to the vent port 105 via a vent hose.

[0029] In a preferred embodiment, the flange connecting block 3 adopts a flange tee with one inlet and two outlets, which is a common feature in the prior art.

[0030] Example 4 differs from Example 3 in that, as Figure 2 As shown, the valve assembly also includes a combined pressure regulating valve 6 connected in series downstream of the pressure regulating valve 9. That is, the pressure regulating valve 9 and the combined pressure regulating valve 6 are connected in series on the gas supply line. The outlet of the combined pressure regulating valve 6 is connected to the gas outlet 102.

[0031] In this embodiment, the combined pressure regulating valve 6 is a pressure regulating valve with a solenoid valve, which is a common technology. The pressure regulating valve 9 and the combined pressure regulating valve 6 achieve a dual pressure reduction function.

[0032] Example 5 differs from Example 4 in that, as Figure 2 As shown, a three-way connector 4 is connected between the combined pressure regulating valve 6 and the gas outlet 103. One port of the three-way connector 4 is connected to the outlet of the combined pressure regulating valve 6, one port is connected to the gas outlet 102, and the other port is connected to the venting branch 2.

[0033] Furthermore, such as Figure 2 and Figure 3 As shown, the housing 1 is provided with a second vent 108. One end of the second vent branch is connected to the third-way connector 4 via a second solenoid valve 5, and the other end of the second vent branch is connected to the second vent 108 on the housing 1 via a second vent hose.

[0034] In this embodiment, the tee connector 4 adopts a tee connector that can be used in the gas supply passage in the prior art.

[0035] Example 5 differs from Example 4 in that, as Figure 2As shown, the gas inlet 101 includes an inner inlet pipe connected to the filter 8 and an outer inlet pipe sleeved on the outside of the inner inlet pipe and fixed to the outside of the housing 1; the gas outlet 102 includes an inner outlet pipe and an outer outlet pipe sleeved on the outside of the inner outlet pipe and fixed to the outside of the housing 1. The inner outlet pipe is connected to one interface of the tee connector 4. Both the outer inlet pipe and the outer outlet pipe are sealed to the housing 1. Both the outer inlet pipe and the outer outlet pipe are connected to flanges. The flanges are connected to the outer pipe lines through mating flanges. A sealing ring is provided between the flanges and the mating flanges to effectively prevent external impurities from entering the housing.

[0036] In this embodiment, the outlet outer pipe is connected to a long outer pipe via a flange, and the outlet inner pipe is also long, extending out of the long outer pipe. A flange cover is connected to the end of the long outer pipe via a flange, and the outlet inner pipe extends out of the flange cover.

[0037] Example 6 differs from Example 4 in that the housing 1 is provided with a first ventilation port 103, a second ventilation port 104, and a leak detection port 106. The first ventilation port 103 and the second ventilation port 104 are arranged opposite each other to facilitate air circulation, expel residual gas inside the valve box and outside the pipes, and further ensure safety.

[0038] In addition, the housing 1 is also equipped with a wiring harness outlet 107 for control lines passing through each valve.

[0039] Example 7: A specific application condition of this utility model is as follows: Inlet pressure: 0.6-0.8 MPa; Outlet pressure: 0.003-0.005 MPa; Housing design pressure: 1 MPa; Valve group design pressure: 1 MPa; Gas inner pipe diameter: 25 mm; Gas outer pipe diameter: 50 mm; Flow rate: ≥10 kg / h; Applicable media: Air, nitrogen, natural gas, etc.; Applicable scenario: Small marine natural gas engine. Solenoid valve one and solenoid valve two are normally open solenoid valves.

[0040] In this embodiment, the working principle is as follows: Natural gas at 0.6-0.8 MPa enters through gas inlet 101, passes through filter 8, and then enters flange connection block 3. At this time, the normally open solenoid valve 7 is controlled to be closed, so the natural gas cannot reach the vent 105. Instead, it enters pressure regulating valve 9 through flange connection block 3, and then enters combined pressure regulating valve 6 through a hose. The solenoid valve of combined pressure regulating valve 6 is controlled to be open, while normally open solenoid valve 5 is closed. The natural gas enters gas outlet 102 through combined pressure regulating valve 6 and flange connection block 4. After being pressure-reduced by both pressure regulating valve 9 and combined pressure regulating valve 6, the natural gas pressure is 0.003-0.005 MPa. Finally, it enters the marine engine through the inner pipe of gas outlet 102.

[0041] Conversely, when the marine engine is not operating, the combined pressure regulating valve 6 is in the closed state. By controlling the normally open solenoid valve 7 and normally open solenoid valve 5 to be in the open state, natural gas cannot enter the engine through the combined pressure regulating valve 6. Instead, it can only be discharged through normally open solenoid valve 7 into vent port 105 and through normally open solenoid valve 5 into vent port 108. In this embodiment, vent port 105 and vent port 108 inside the tank are connected by copper pipes (φ8×1).

[0042] In addition, the small GVU valve box can be used to check for leaks in the pipeline through the leak detection port 106. Even if a leak occurs in the pipeline inside the box, the leaking gas can be removed through the vent 103 and vent 2 104 to prevent accidents. Its working principle diagram is shown below. Figure 3 As shown.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features thereof, within the spirit and principles of the present invention, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A small GVU valve box, characterized in that, It includes a housing (1), an air supply passage set inside the housing (1), and a valve group set on the air supply passage. The air supply passages at both ends of the valve group are respectively connected to a venting branch one and a venting branch two, and solenoid valves are respectively provided on the venting branch one and the venting branch two.

2. The small GVU valve box according to claim 1, characterized in that, One end of the gas supply passage is connected to the gas inlet (101) on the box (1), and the other end is connected to the gas outlet (102) on the box (1); the valve group includes a pressure stabilizing valve (9) installed on the gas supply passage.

3. The small GVU valve box according to claim 2, characterized in that, The front end of the pressure regulating valve (9) is connected to the gas inlet (101) through the filter (8).

4. The small GVU valve box according to claim 3, characterized in that, A flange connection block (3) is provided between the filter (8) and the pressure regulating valve (9). The flange connection block (3) has two outlets. One outlet of the flange connection block (3) is connected to the vent branch, and the other outlet is connected to the inlet of the pressure regulating valve (9) through a hose.

5. The small GVU valve box according to claim 4, characterized in that, One end of the vent branch is connected to the flange connecting block (3) via a solenoid valve (7), and the other end is connected to the vent port (105) on the box (1).

6. The small GVU valve box according to claim 5, characterized in that, The valve assembly also includes a combined pressure regulating valve (6) connected in series downstream of the pressure regulating valve (9).

7. The small GVU valve box according to claim 6, characterized in that, A three-way connector (4) is connected between the combined pressure regulating valve (6) and the gas outlet (102), and one interface of the three-way connector (4) is connected to the second vent branch.

8. The small GVU valve box according to claim 7, characterized in that, One end of the second venting branch is connected to the three-way connector (4) via the second solenoid valve (5), and the other end of the second venting branch is connected to the second venting port (108) of the box (1).

9. The small GVU valve box according to any one of claims 2 to 8, characterized in that, The gas inlet (101) includes an inner inlet pipe connected to the gas supply passage and an outer inlet pipe sleeved on the outside of the inner inlet pipe and fixed on the outside of the housing (1); the gas outlet (102) includes an inner outlet pipe and an outer outlet pipe sleeved on the outside of the inner outlet pipe and fixed on the outside of the housing (1).

10. The small GVU valve box according to any one of claims 1 to 8, characterized in that, The box (1) is provided with ventilation port one (103) and ventilation port two (104) as well as leak detection port (106).

Images