Compressed natural gas pressure reducing valve heating structure and compressed natural gas pressure reducing valve

Abstract

The utility model relates to the technical field of pressure reducing valves, and provides a compressed natural gas pressure reducing valve heating structure and a compressed natural gas pressure reducing valve, the compressed natural gas pressure reducing valve heating structure comprises a pressure reducing valve body, the pressure reducing valve body is provided with a hollow cavity, a plurality of heating pieces are embedded in the inner wall of the hollow cavity, and the heating pieces are arranged in the circumferential direction of the cavity of the pressure reducing valve body; and is connected in series with the power supply. According to the utility model, the plurality of heating pieces are embedded in the inner wall of the hollow cavity of the pressure reducing valve body, are arranged along the circumferential direction of the cavity of the pressure reducing valve body and are connected in series, so that electric energy is quickly converted into heat energy, and the heating function of the compressed natural gas pressure reducing valve is realized; compared with a structure of using circulating water to heat the pressure reducing valve, the heating time is short, the structure is simple, a heating system does not need to be additionally arranged independently, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, and more particularly to a compressed natural gas pressure reducing valve heating structure and a compressed natural gas pressure reducing valve. Background Art

[0002] The current heating solution for the pressure reducing valve of a single-fuel engine requires an external electric heating device to heat the circulating water in the valve body water channel to indirectly heat the valve body. The efficiency and application scenarios of this type of pressure reducing valve heating method are subject to the properties of the circulating water (large specific heat capacity, long heating time), the heat exchange efficiency of water, valve body and front-end materials, and the thermoelectric conversion efficiency of the heat source (low efficiency cannot generate heat immediately, large heat transfer loss, and large temperature control delay). In addition, in extremely cold areas, if the vehicle antifreeze is lacking or leaking, there is also a risk of water pipe freezing. If the external pipeline for transmitting circulating water is too long, the heat loss along the way will also be huge. If a water channel is arranged inside the pressure reducing valve body, the processing difficulty of the valve body will increase, and the internal structural layout of the pressure reducing valve body will also be restricted by the water channel. Utility Model Content

[0003] The purpose of the utility model is to provide a compressed natural gas pressure reducing valve heating structure and a compressed natural gas pressure reducing valve, so as to solve the technical problem of the difficulty in heating the compressed natural gas pressure reducing valve.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] On the one hand, the utility model provides a compressed natural gas pressure reducing valve heating structure, which includes a pressure reducing valve body, which has a hollow cavity, and a plurality of heating plates are embedded on the inner wall of the hollow cavity. The plurality of heating plates are arranged along the circumference of the cavity of the pressure reducing valve body and are connected in series to a power supply.

[0006] In some optional embodiments, the hollow cavity has at least one opening, and at least one slot is provided on the edge end face of the opening. The slots are arranged side by side along the circumference of the opening edge, and the slots match the heating fins one by one.

[0007] In some optional embodiments, the hollow cavity is a cylindrical cavity, and at least one circle of annular wire groove is provided on the inner wall near the slot position. Conductive plates are provided at the upper and lower ends of the heating plate respectively. The two heating plates are connected in series through contact with the conductive plates through wires, and the wires used to connect the conductive plates are embedded in the annular wire groove.

[0008] In some optional embodiments, an even number of slots are provided on the hollow cavity, and a heating sheet is inserted into each slot.

[0009] In some optional embodiments, the heating sheet includes a graphene heating sheet or a carbon fiber heating sheet.

[0010] In some optional embodiments, four slots are provided on the hollow cavity, wherein two opposite slots are each inserted with a graphene heating sheet, and the other two opposite slots are each inserted with a carbon fiber heating sheet.

[0011] In some optional embodiments, when the heating sheet is a carbon fiber heating sheet, a plurality of openings are provided on the inner wall of the hollow cavity, and the openings are connected to the slots where the carbon fiber heating sheet is located.

[0012] In some optional embodiments, the compressed natural gas pressure reducing valve heating structure also includes a temperature sensor, a battery and a controller. The temperature sensor is arranged on the valve body of the pressure reducing valve. The battery is connected to the heating plate and is used to power the heating plate. The controller is connected to the temperature sensor and the battery respectively and is used to adjust the power of the heating plate according to the temperature value detected by the temperature sensor.

[0013] On the other hand, the present invention further provides a compressed natural gas pressure reducing valve, which includes the above-mentioned compressed natural gas pressure reducing valve heating structure.

[0014] In some optional embodiments, the compressed natural gas pressure reducing valve also includes a pressure regulating assembly, which is axially movably arranged in the hollow cavity; and an air inlet and an air outlet are provided on the outer side surface of the pressure reducing valve body, and the air inlet and the air outlet are respectively located close to the axial ends of the hollow cavity and are connected to the hollow cavity.

[0015] The beneficial effect of the compressed natural gas pressure reducing valve heating structure provided by the present invention is at least that: by embedding multiple heating plates on the inner wall of the hollow cavity of the pressure reducing valve body, the multiple heating plates are arranged along the circumference of the cavity of the pressure reducing valve body and connected in series, so as to quickly convert electrical energy into thermal energy, thereby realizing the heating function of the compressed natural gas pressure reducing valve. Compared with the structure of using circulating water to heat the pressure reducing valve, not only the heating time is fast, but also the structure is simple, there is no need to add a separate heating system, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic cross-sectional view of a heating structure of a compressed natural gas pressure reducing valve provided by an embodiment of the present utility model;

[0018] Figure 2A schematic diagram of the exploded structure of the pressure reducing valve body and the heating element provided in an embodiment of the present utility model;

[0019] Figure 3 A schematic structural diagram of a pressure reducing valve body provided by an embodiment of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of a heating element provided in an embodiment of the present utility model.

[0021] Among them, the reference numerals in the figures are:

[0022] 1. Pressure reducing valve body; 11. Air inlet; 12. Air outlet; 13. Slot; 14. Opening; 2. Heating plate; 21. Conductive plate; 3. Voltage regulating assembly. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] See Figures 1 to 4 In a first embodiment of the present utility model, a compressed natural gas pressure reducing valve heating structure is provided, which includes a pressure reducing valve body 1, the pressure reducing valve body 1 having a hollow cavity, and a plurality of heating plates 2 are embedded on the inner wall of the hollow cavity, and the plurality of heating plates 2 are arranged along the circumference of the cavity of the pressure reducing valve body 1 and are connected in series to a power supply.

[0026] The English name of compressed natural gas is Compressed Natural Gas, generally referred to as CNG. In practice, the above-mentioned compressed natural gas pressure reducing valve heating structure can be applied to a compressed natural gas pressure reducing valve. A compressed natural gas pressure reducing valve (also known as a CNG pressure reducing valve or a pressure reducing valve) is a regulating device specifically used to control compressed natural gas from high pressure to low pressure. It is usually used in natural gas vehicles or natural gas supply systems to ensure that the gas is reduced in pressure to a safe working range before entering the engine or gas-using equipment. For example, in a natural gas vehicle or system, when the natural gas engine is working, the high-pressure compressed natural gas is first input into the combustion chamber of the compressed natural gas engine through a pressure reducing valve for combustion. The pressure reducing valve plays a key regulating and protective role, converting the high-pressure stored natural gas into a safe and applicable pressure to meet various gas needs. In this embodiment, a plurality of heating plates 2 are embedded in the inner wall of the pressure reducing valve body 1. The heating plates 2 are connected to a power supply, which can quickly convert electrical energy into thermal energy, thereby achieving the effect of heating the compressed natural gas pressure reducing valve.

[0027] The compressed natural gas pressure reducing valve heating structure provided by the pressure reducing valve body 1 according to the embodiment of the present invention has multiple heating plates 2 embedded on the inner wall of the hollow cavity of the pressure reducing valve body 1. The multiple heating plates 2 are arranged circumferentially along the cavity of the pressure reducing valve body 1 and are connected in series to a power supply (optionally a battery) to quickly convert electrical energy into thermal energy, thereby realizing the heating function of the compressed natural gas pressure reducing valve. Compared with the structure of using circulating water to heat the pressure reducing valve, not only the heating time is fast, but also the structure is simple, there is no need to add a separate heating system, and the cost is lower.

[0028] In some optional embodiments, the hollow cavity has at least one opening, and at least one slot 13 is provided on the edge end face of the opening. The slots 13 are arranged side by side along the circumference of the opening edge, and the slots 13 are matched one by one with the heating plate 2.

[0029] Specifically, the slot 13 can be a blind slot or a through slot.

[0030] The hollow cavity may have only one opening. In this case, the slot 13 is preferably a blind slot. Each blind slot is arranged circumferentially along the edge of the opening. There is a certain interval between adjacent blind slots. A heating plate 2 is inserted into each slot 13 .

[0031] The opening of the hollow cavity can also be two. Specifically, the hollow cavity has two opposite openings, and the slot 13 can be a through slot. The slot 13 runs through the two openings, and each through slot is arranged side by side along the circumference of the opening edge. There is a certain interval between adjacent through slots, and each through slot is inserted with a heating plate 2. In addition, at least one blind slot can be opened on the edge end surface of the two openings respectively, and the slots 13 on the two openings can be connected to the heating plate 2.

[0032] Furthermore, the pressure reducing valve body 1 further includes valve covers, the number of which is consistent with the number of openings, and each valve cover is connected to an opening to seal the hollow cavity.

[0033] In this embodiment, a slot is opened on the inner wall of the hollow cavity to insert the heating plate 2, so that the heating plate 2 is embedded in the middle of the inner wall, so that the inner wall of the hollow cavity is covered with heating plates 2. When the heating plates 2 are powered on, the heating plates 2 will generate heat to heat the hollow cavity, so that the entire valve body is heated evenly, achieving the effect of heating the pressure reducing valve, and because the arrangement position is within the space of the outer wall of the valve body, the freedom of arrangement of the pressure reducing components in the valve body is guaranteed to the greatest extent.

[0034] In practice, the shape of the hollow cavity is not unique.

[0035] In some optional embodiments, the hollow cavity is a cylindrical cavity.

[0036] At least one circle of annular wire groove is provided on the inner wall near the slot position of the slot 13, and conductive plates 21 are provided at the upper and lower ends of the heating plate 2 respectively. The two heating plates 2 are connected in series through wires that contact the conductive plates 21, and the wires used to connect the conductive plates 21 are embedded in the annular wire groove.

[0037] Specifically, since the upper and lower ends of the heating plate are provided with conductive plates 21, after the heating plate is inserted into the slot, the conductive plates 21 are exposed at the slot position, and two heating plates connected in series can be connected by wires at the conductive plates 21 at one end of the two heating plates, and the wires connecting the conductive plates are embedded in the annular wire groove. Figure 2 and Figure 4 For example, the hollow cavity is a cylindrical cavity, and there are 4 slots on the inner wall of the hollow cavity. The slots are through slots, and a heating plate 2 is inserted into each slot, that is, there are 4 heating plates, assuming that they are heating plate A, heating plate B, heating plate C and heating plate D respectively. The heating plate A and the heating plate B are connected by a first wire at the conductive plate 21 at one axial end of the hollow cavity, the heating plate C and the heating plate D are connected by a second wire at the conductive plate 21 at one axial end of the hollow cavity, the heating plate B and the heating plate C are connected by a third wire at the other axial end of the hollow cavity, and the heating plate D is connected by a fourth wire to the conductive plate 21 at the other axial end of the hollow cavity, thereby realizing the series connection of the 4 heating plates on the inner wall of the hollow cavity.

[0038] Furthermore, the wires connecting the four heating plates are respectively embedded in the corresponding annular wire grooves. The annular wire grooves can be single-circle or multi-circle. In the case of a single-circle annular wire groove, all the wires connecting the conductive plate 21 can be embedded in the annular wire groove at one end. In the case of a multi-circle annular wire groove, each wire connecting the conductive plate 21 can be embedded in a corresponding annular wire groove.

[0039] Preferably, the shape of the heat sink is consistent with the shape of the slot 13. In the case where the hollow cavity is a cylindrical cavity, the heat sink 2 can preferably be a circular arc-shaped sheet structure, and the conductive sheets 21 at the upper and lower ends are conductive materials, including but not limited to conductive copper sheets, conductive iron sheets, conductive aluminum sheets and other conductive materials.

[0040] In addition, the hollow cavity may also be in other shapes, including but not limited to a polyhedral column cavity, an elliptical cavity, and a spherical cavity.

[0041] In the embodiment of the present invention, the hollow cavity is preferably a cylindrical cavity, and annular wire grooves are provided at both axial ends of the cylindrical cavity, so that the conductive plates 21 at the upper and lower ends of the heating plate 2 inserted into the slot 13 can be connected by arranging wires in the annular wire grooves, thereby realizing the series connection of each heating plate 2.

[0042] In practice, the number of slots 13 can be determined according to the circumferential width of the inner wall of the hollow cavity, or according to the size of the heating plate 2. The embodiment of the present invention does not limit the number of slots 13.

[0043] In some optional embodiments, an even number of slots 13 are provided on the hollow cavity, and a heating plate 2 is inserted into each slot 13 .

[0044] Specifically, the number of slots 13 can be 2, 4, 6 or 8. For example, Figure 2 The number of slots 13 is 4. Of course, the actual number of slots 13 can also be an odd number, for example, the number of slots 13 is 3, 5 or 7, etc.

[0045] In practice, the type of heating sheet 2 is not unique. For example, the heating sheet 2 includes but is not limited to carbon fiber heating sheet, graphene heating sheet, metal foil heating sheet, PTC (abbreviation of Positive Temperature Coefficient, translated as positive temperature coefficient) ceramic heating sheet, silicone heating sheet and electric heating film heating sheet, etc. The embodiment of the present utility model does not limit this.

[0046] In some optional embodiments, the heating sheet may be a graphene heating sheet or a carbon fiber heating sheet; or the heating sheet may also be a graphene heating sheet or a carbon fiber heating sheet.

[0047] Specifically, carbon fiber heaters and graphene heaters are two different types of electric heating elements made from different materials. Carbon fiber heaters are made from carbon fiber, which has excellent electrical and thermal conductivity. They work by converting electrical energy into thermal energy through the resistive heat generated by the carbon fiber when electricity is applied, thereby heating the surrounding environment. Graphene heaters are made from graphene, a material with high thermal conductivity, flexibility, and durability. They work by generating heat through electricity.

[0048] The difference between carbon fiber heating sheets and graphene heating sheets is that: carbon fiber heating sheets use radiation heating, and when heated, the carbon fiber generates uniform heat, which is durable and has high heating efficiency; graphene heating sheets use conduction heating, and when powered on, the heating sheets can heat quickly and evenly, with high thermal efficiency and energy saving.

[0049] Preferably, the heating sheet embedded in the slot on the hollow cavity includes a carbon fiber heating sheet and a graphene heating sheet. Since the carbon fiber heating sheet is radiant heating and has high heating efficiency, it can quickly heat the valve body in a short time. In practical applications, if the pressure reducing valve is used in a natural gas engine, the carbon fiber heating sheet can be used to quickly heat the pressure reducing valve when the natural gas engine is just started, without waiting; after the engine is started, the graphene heating sheet can be used to maintain the operating temperature of the valve body. The thermal efficiency of the graphene heating sheet is higher than that of the carbon fiber heating sheet, thereby achieving energy saving.

[0050] Optionally, the hollow cavity is provided with four slots 13, wherein two of the slots 13 facing each other are each inserted with a graphene heating sheet, and the other two slots 13 facing each other are each inserted with a carbon fiber heating sheet. Figure 2 For example, there are 4 slots on the hollow cavity, 2 of which are inserted with 2 carbon fiber heating sheets, and 2 graphene heating sheets are inserted with the other two slots. The carbon fiber heating sheet and the graphene heating sheet can be inserted into the 4 slots in sequence. For example, the 4 slots are slot S1, slot S2, slot S3 and slot S4 in the circumferential direction, wherein the graphene heating sheets are inserted into slots S1 and S2, and the carbon fiber heating sheets are inserted into slots S3 and S4. Alternatively, the carbon fiber heating sheet and the graphene heating sheet can also be inserted alternately into the four slots. For example, the four slots are slot S1, slot S2, slot S3 and slot S4 in the circumferential direction, wherein slots S1 and S3 are inserted with graphene heating sheets, and slots S2 and S4 are inserted with carbon fiber heating sheets. Here, each of the four heating sheets has conductive copper sheets at both ends, two of which are graphene heating sheets and the other two are carbon fiber heating sheets. Before the graphene heating sheet and the carbon fiber heating sheet are embedded in the slots, insulating thermal conductive glue can be applied in the four slots to reduce thermal resistance and improve heat conduction performance.

[0051] In this embodiment, dual heating is used using a graphene heating sheet and a carbon fiber heating sheet. Since the graphene heating sheet is heat conductive, it has a fast heating speed. At the same time, the carbon fiber heating sheet is far-infrared heating, which has a high heating efficiency. The two complement each other and can cope with various working scenarios.

[0052] Furthermore, when a graphene heating sheet is selected as the heating sheet, the graphene heating body can be connected in series using a wire on one side of the hollow cavity. The thermoelectric conversion efficiency of the graphene heating body is close to 100%, the operating current is small, and the temperature control is simple. It can be used as a heat source for continuous heating to maintain the temperature of the pressure reducing valve.

[0053] Furthermore, when the heating sheet is a carbon fiber heating sheet, a plurality of openings 14 are provided on the inner wall of the hollow cavity, and the openings 14 are connected to the slots where the carbon fiber heating sheet is located.

[0054] Specifically, one side of the two carbon fiber heating bodies on the inner wall of the hollow cavity can be connected in series with a wire, and a plurality of openings 14 or holes are opened on the side of the slot 13 where the carbon fiber heating body is located facing the inner wall. After power is turned on, the carbon fiber heating sheet will quickly heat the pressure reducing valve body 1 due to the "Brownian motion" of the molecular clusters. After power is turned on, the carbon fiber material will also emit far infrared rays that can directly act on the gas in each pressure reducing chamber.

[0055] Therefore, the purpose of opening a hole on one side of the inner wall of the slot 13 where the carbon fiber heating sheet is embedded is that since different metals will shield or weaken the propagation of far infrared rays to varying degrees, opening a hole on the inner wall of the carbon fiber embedding groove ensures the intensity of far infrared radiation inward.

[0056] In this embodiment, the carbon fiber heating sheets on the inner wall of the hollow cavity are arranged symmetrically. Since a plurality of openings 14 are provided on the inner wall of the hollow cavity, the density of the far infrared rays emitted by the carbon fibers is higher at the central axis of the valve body.

[0057] In practice, the compressed natural gas pressure reducing valve can be used in natural gas engines. Before the natural gas is input into the engine, the high-pressure natural gas first enters the compressed natural gas pressure reducing valve. The natural gas can be heated through the above-mentioned compressed natural gas pressure reducing valve heating structure. In order to ensure the stability of the heating temperature, the temperature of the pressure reducing valve can be monitored during the heating process to adjust the power of the heating plate.

[0058] In some embodiments, the above-mentioned compressed natural gas pressure reducing valve heating structure also includes a temperature sensor, a battery and a controller. The temperature sensor is arranged on the pressure reducing valve body 1, and the battery is connected to the heating plate for powering the heating plate. The controller is connected to the sensor and the battery respectively for adjusting the power of the heating plate according to the temperature value detected by the temperature sensor.

[0059] Specifically, after the heating plate is energized, the valve body can be self-heated, and the heating speed is fast. The temperature sensor monitors the temperature value of the valve body and feeds back to the controller. The controller can also control the temperature of the pressure reducing valve by controlling the current flowing to the pressure reducing valve according to the power demand and real-time working conditions, thereby achieving precise control of the heating temperature of the pressure reducing valve. For example, in an application scenario, when the vehicle is powered on, the pressure reducing valve energy supply battery is preferentially the power battery. When it is detected that the power battery is out of power, it is switched to the storage battery. When the storage battery is out of power, an external power supply can be connected. After power is turned on, the vehicle will determine that the battery has power and execute the battery power supply mode. When the vehicle is cold-started, the temperature of the pressure reducing valve is low. At this time, the above-mentioned compressed natural gas pressure reducing valve heating structure can be controlled to heat the pressure reducing valve at the highest power. For example, the working time of the carbon brazing fiber heating plate is controlled until the engine water temperature reaches 80 degrees Celsius. After the engine room temperature rises, the current of the carbon brazing fiber heating plate is disconnected, and only the graphene heating plate is used to maintain the temperature of the pressure reducing valve body 1.

[0060] The heating structure for the compressed natural gas pressure reducing valve provided by the embodiment of the utility model also has the following beneficial effects:

[0061] 1. The heating structure of the compressed natural gas pressure reducing valve can instantly heat the valve body and gas when the engine is started without the help of an external heat source. The response speed is unmatched by traditional heating methods.

[0062] 2. The thermoelectric conversion efficiency of the compressed natural gas pressure reducing valve heating structure is much higher than the method of using circulating water as a heat medium to transfer heat. The pressure reducing valve also does not need to be equipped with complex water channels, and the powertrain does not need to be connected to the pressure reducing valve through an external water pipe, which simplifies the structure of the pressure reducing valve body and the powertrain.

[0063] 3. Range extenders equipped with this CNG pressure reducing valve heating structure can directly use natural gas as fuel to generate electricity and drive the entire vehicle during the cold start phase, avoiding the situation where such new energy vehicles cannot start due to power battery shortage in cold weather. Due to the ultra-high thermoelectric conversion rate and low voltage requirement of the heating plate, when both large and small batteries are out of power, external power can be supplied to the small battery.

[0064] 4. New energy vehicles equipped with the CNG pressure reducing valve heating structure can adopt a single fuel solution, eliminating the need to add a complete fuel system for vehicle cold start, thus reducing costs.

[0065] Recombination Figures 1 to 4 In a second embodiment of the present invention, a compressed natural gas pressure reducing valve is provided, which includes the compressed natural gas pressure reducing valve heating structure in any of the above embodiments.

[0066] In practical applications, this CNG pressure reducing valve can be used in new energy vehicles. For example, it can be placed at the input of a natural gas engine to heat the natural gas entering the engine. As can be seen, the present embodiment of the utility model achieves heating by evenly arranging and embedding the heating element 2 within the inner wall of the hollow cavity of the valve body, ensuring uniform heating throughout the valve body. Furthermore, the placement of the heating element within the outer wall of the valve body maximizes the freedom of arrangement of the pressure reducing components within the valve body, thereby achieving the heating function of the valve body.

[0067] In practice, the internal structure of a compressed natural gas pressure reducing valve is not unique.

[0068] In some optional embodiments, the above-mentioned compressed natural gas pressure reducing valve also includes a pressure regulating assembly 3, which is axially movably arranged in the hollow cavity; and an air inlet 11 and an air outlet 12 are provided on the outer side surface of the pressure reducing valve body, and the air inlet 11 and the air outlet 12 are respectively located close to the axial ends of the hollow cavity and are connected to the hollow cavity.

[0069] Specifically, the pressure-regulating assembly includes but is not limited to a diaphragm, a spring, and a valve core. The diaphragm senses pressure changes and automatically adjusts the valve's opening. The diaphragm moves as the input and output pressures change, thereby controlling the gas flow rate and maintaining a constant output pressure. The spring, in conjunction with the diaphragm, adjusts the output pressure by varying the spring's tension. During pressure regulation, the spring force resists the gas pressure, thereby controlling the valve's opening. The valve core acts as a switch to control gas flow, regulating both flow and pressure within the valve.

[0070] Specifically, when the compressed natural gas pressure reducing valve is working, high-pressure natural gas enters the valve body from the air inlet 11, thereby pushing the diaphragm to move toward the air outlet 12. When the diaphragm exceeds the position of the air outlet 12, the gas will be output from the air outlet 12, thereby achieving the effect of gas pressure reduction. During this pressure reduction process, the heating plate 2 embedded in the valve body heats the valve body by energizing it, thereby achieving the effect of heating the gas entering the hollow cavity.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compressed natural gas pressure reducing valve heating structure, characterized in that: include: The pressure reducing valve body has a hollow cavity, and a plurality of heating plates are embedded on the inner wall of the hollow cavity. The plurality of heating plates are arranged along the circumference of the cavity of the pressure reducing valve body and are connected in series to a power supply.

2. The compressed natural gas pressure reducing valve heating structure according to claim 1, characterized in that: The hollow cavity has at least one opening, and at least one slot is provided on the edge end surface of the opening. The slots are arranged side by side along the circumference of the opening edge, and the slots are matched with the heating sheets one by one.

3. The compressed natural gas pressure reducing valve heating structure according to claim 2, characterized in that: The hollow cavity is a cylindrical cavity, and at least one circle of annular wire groove is provided on the inner wall near the slot position. Conductive plates are provided at the upper and lower ends of the heating plate respectively. The two heating plates are connected in series through wires that contact the conductive plates, and the wires used to connect the conductive plates are embedded in the annular wire groove.

4. The compressed natural gas pressure reducing valve heating structure according to claim 3, characterized in that: An even number of slots are provided on the hollow cavity, and a heating sheet is inserted into each slot.

5. The compressed natural gas pressure reducing valve heating structure according to claim 4, characterized in that: The heating sheet includes a graphene heating sheet or a carbon fiber heating sheet.

6. The compressed natural gas pressure reducing valve heating structure according to claim 4, characterized in that: The hollow cavity is provided with four slots, wherein two opposite slots are each inserted with a graphene heating sheet, and the other two opposite slots are each inserted with a carbon fiber heating sheet.

7. The compressed natural gas pressure reducing valve heating structure according to claim 6, characterized in that: In the case that the heating sheet is a carbon fiber heating sheet, a plurality of openings are provided on the inner wall of the hollow cavity, and the openings are connected to the slot where the carbon fiber heating sheet is located.

8. The compressed natural gas pressure reducing valve heating structure according to any one of claims 1 to 7, characterized in that: It also includes a temperature sensor, a battery and a controller. The temperature sensor is arranged on the valve body of the pressure reducing valve. The battery is connected to the heating plate and is used to power the heating plate. The controller is connected to the temperature sensor and the battery respectively and is used to adjust the power of the heating plate according to the temperature value detected by the temperature sensor.

9. A compressed natural gas pressure reducing valve, characterized in that: The invention comprises the compressed natural gas pressure reducing valve heating structure according to any one of claims 1 to 8.

10. The compressed natural gas pressure reducing valve according to claim 9, characterized in that: Also included is a pressure regulating assembly, which is axially movably disposed in the hollow cavity; An air inlet and an air outlet are provided on the outer side of the valve body of the pressure reducing valve. The air inlet and the air outlet are respectively close to the axial ends of the hollow cavity and are communicated with the hollow cavity.

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