Fuel gas conversion valve

Abstract

The utility model discloses a fuel gas change-over valve which comprises a valve seat, an electromagnetic valve cover and an electromagnetic valve push rod, a public gas inlet channel, a natural gas inlet channel, a gas outlet channel and a center cavity are formed in the valve seat, and the public gas inlet channel, the natural gas inlet channel, the gas outlet channel and the center cavity are communicated. The electromagnetic valve push rod is connected to the electromagnetic valve cover in a sliding mode and can slide in the natural gas inlet channel, and a channel between the natural gas inlet channel and the center cavity is opened and closed through the electromagnetic valve push rod. The change-over valve has the advantages that the natural gas pipe and the liquefied petroleum gas pipe can conveniently enter the change-over valve through the public gas inlet channel, the natural gas pipe and the liquefied petroleum gas pipe can be conveniently arranged at the same end of the change-over valve side by side, it is guaranteed that pipelines are arranged in order, and installation and layout of parts in a cabin are not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gas conversion valve. Background Art

[0002] With the widespread use of new energy sources such as clean energy natural gas, liquefied petroleum gas, and biogas, domestic, commercial, and industrial generators that use gas as fuel are widely used internationally. However, using different gases requires a device to convert the gas so that the engine can burn different gases and maintain normal operation.

[0003] Patent No. CN219198219U discloses a gas conversion valve, including a valve body, a valve core cavity penetrating up and down is provided at the inner center of the valve body, a liquefied gas inlet hole connected to the valve core cavity is provided at the center of the right side of the valve body, and a natural gas inlet hole is provided on the left side of the valve body at a position symmetrical to the liquefied gas inlet hole. Since the liquefied petroleum gas inlet hole and the natural gas inlet hole are respectively arranged on both sides of the valve, the liquefied petroleum gas pipe and the natural gas pipe need to be respectively connected to both sides of the valve, resulting in a messy layout of the engine room pipelines, affecting the layout and installation of other parts. Summary of the invention

[0004] The utility model aims to provide a gas conversion valve, in which both the natural gas pipe and the liquefied petroleum gas pipe enter the conversion valve through a common air inlet passage, thereby facilitating the natural gas pipe and the liquefied petroleum gas pipe to be arranged side by side at the same end of the conversion valve, thereby ensuring a neat pipeline layout and avoiding affecting the installation layout of parts in the cabin.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0006] A gas conversion valve comprises a valve seat, a solenoid valve cover and a solenoid valve push rod, wherein a common air inlet channel, a natural gas air inlet channel, an air outlet channel and a central cavity are formed on the valve seat, and the common air inlet channel, the natural gas air inlet channel, the air outlet channel and the central cavity are communicated with each other, and the solenoid valve push rod is slidably connected to the solenoid valve cover and can slide in the natural gas air inlet channel, and the channel between the natural gas air inlet channel and the central cavity is opened and closed by the solenoid valve push rod.

[0007] The utility model adopting the above scheme, by setting a common air intake channel and a natural gas air intake channel, and making the common air intake channel, the natural gas air intake channel, the air outlet channel and the central cavity communicate with each other, it is convenient for both the natural gas pipe and the liquefied petroleum gas pipe to enter the conversion valve through the common air intake channel, and then it is convenient to arrange the natural gas pipe and the liquefied petroleum gas pipe side by side at the same end of the conversion valve, to ensure the neat layout of the pipelines and avoid affecting the installation layout of the parts in the cabin. When the solenoid valve push rod receives the corresponding signal, the solenoid valve push rod slides along the solenoid valve cover to open and close the channel between the natural gas air intake channel and the central cavity. When the channel between the natural gas air intake channel and the central cavity is opened, the natural gas can enter the central cavity through the common air intake channel and the natural gas air intake channel at the same time, ensuring the flow rate of the natural gas, and then ensuring the normal operation of the engine; when the channel between the natural gas air intake channel and the central cavity is closed, the liquefied petroleum gas can only enter the central cavity through the common air intake channel, preventing the concentration of the petroleum gas entering the generator from being too high, and the muffler from having a popping sound, ensuring the stable speed of the engine, and meeting the engine combustion of different fuel gases to maintain the normal operation of the engine.

[0008] Preferably, a first sealing ring is installed on the solenoid valve push rod, and the passage between the natural gas intake passage and the central cavity is opened and closed by the first sealing ring.

[0009] In this way, by providing the first sealing ring, the solenoid valve push rod can drive the sealing ring to seal or open the channel between the natural gas intake channel and the central cavity, thereby switching to use different gases for combustion.

[0010] Preferably, the first sealing ring is in the form of a square block as a whole, and a countersunk hole is formed on the first sealing ring, through which the first sealing ring is tightly matched with the push rod of the solenoid valve.

[0011] In this way, by making the first sealing ring into a square block as a whole, it is convenient to completely seal the channel between the natural gas intake channel and the central cavity. A countersunk hole is also formed on the first sealing ring, which facilitates the installation of the first sealing ring on the solenoid valve push rod through the countersunk hole.

[0012] Preferably, the first sealing ring is made of rubber.

[0013] In this way, the first sealing ring is made of rubber, which makes it easy to utilize the plasticity of the rubber and improve the sealing effect.

[0014] Preferably, one end of the solenoid valve push rod is slidably connected in the solenoid valve cover, and the other end is located in the natural gas intake passage. A convex ring is formed at the end of the solenoid valve push rod located in the natural gas intake passage, and the convex ring can abut against the first sealing ring.

[0015] Thus, by forming a convex ring at one end of the solenoid valve push rod located in the natural gas intake passage, when the first sealing ring seals the passage between the natural gas intake passage and the central cavity, the convex ring squeezes the first sealing ring to improve the sealing effect.

[0016] Preferably, the cross-section of the central cavity is quadrilateral, and through holes communicating with the common air inlet channel, the natural gas air inlet channel and the air outlet channel are respectively formed on the three side walls of the central cavity.

[0017] In this way, by making the cross section of the central cavity quadrilateral and forming through holes communicating with the common air inlet channel, the natural gas air inlet channel and the air outlet channel on the three side walls of the central cavity, it is convenient for the fuel gas to enter the engine through the air outlet channel.

[0018] Preferably, the natural gas intake passage is located above the central cavity, and a through hole communicating with the common intake passage is formed on one side of the natural gas intake passage.

[0019] In this way, a through hole communicating with the common intake channel is formed on one side of the natural gas intake channel, so that when using natural gas, the natural gas entering from the common intake channel can enter the inner cavity from the natural gas intake channel, thereby ensuring the flow rate of the natural gas and ensuring the normal operation of the engine.

[0020] Preferably, the solenoid valve cover is connected above the valve seat, a groove is formed on the top of the valve seat, a second sealing ring is installed in the groove, and the second sealing ring is located between the solenoid valve cover and the valve seat.

[0021] In this way, by forming a groove on the top of the valve seat and installing a second sealing ring in the groove, the second sealing ring can ensure the sealing effect between the solenoid valve cover and the valve seat.

[0022] Preferably, the second sealing ring is an O-ring.

[0023] The utility model has the following beneficial effects: by setting a common air intake channel and a natural gas air intake channel, and making the common air intake channel, the natural gas air intake channel, the air outlet channel and the central cavity communicate with each other, it is convenient for both the natural gas pipe and the liquefied petroleum gas pipe to enter the conversion valve through the common air intake channel, and then it is convenient to arrange the natural gas pipe and the liquefied petroleum gas pipe side by side at the same end of the conversion valve, so as to ensure the neat layout of the pipelines and avoid affecting the installation layout of the parts in the cabin. When the solenoid valve push rod receives the corresponding signal, the solenoid valve push rod slides along the solenoid valve cover to open and close the channel between the natural gas air intake channel and the central cavity. When the channel between the natural gas air intake channel and the central cavity is opened, the natural gas can enter the central cavity through the common air intake channel and the natural gas air intake channel at the same time, so as to ensure the flow rate of the natural gas and then ensure the normal operation of the engine; when the channel between the natural gas air intake channel and the central cavity is closed, the liquefied petroleum gas can only enter the central cavity through the common air intake channel, so as to prevent the concentration of the petroleum gas entering the generator from being too high and the muffler from having a popping sound, so as to ensure the stable speed of the engine, and meet the requirements of the engine burning different fuel gases to maintain the normal operation of the engine. By forming a convex ring at one end of the solenoid valve push rod located in the natural gas intake passage, when the first sealing ring seals the passage between the natural gas intake passage and the central cavity, the convex ring squeezes the first sealing ring to improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the utility model when using natural gas;

[0025] Figure 2 This is a schematic diagram of the utility model when using liquefied petroleum gas. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.

[0027] The reference numerals in the drawings of the specification include: valve seat 1, common air inlet passage 11, natural gas air inlet passage 112, central cavity 12, air outlet passage 13, solenoid valve cover 2, first sealing ring 21, second sealing ring 22, solenoid valve push rod 23, convex ring 231.

[0028] Embodiment 1, as Figure 1 and Figure 2As shown; a gas conversion valve comprises a valve seat 1, a solenoid valve cover 2 and a solenoid valve push rod 23, wherein a common air inlet channel 11, a natural gas air inlet channel 112, an air outlet channel 13 and a central cavity 12 are formed on the valve seat 1, and the common air inlet channel 11, the natural gas air inlet channel 112, the air outlet channel 13 and the central cavity 12 are communicated with each other, and the solenoid valve push rod 23 is slidably connected to the solenoid valve cover 2 and can slide in the natural gas air inlet channel 112, and the channel between the natural gas air inlet channel 112 and the central cavity 12 is opened and closed by the solenoid valve push rod 23.

[0029] See also Figure 1 and Figure 2 The first sealing ring 21 is installed on the solenoid valve push rod 23, and the passage between the natural gas inlet passage 112 and the central cavity 12 is opened and closed by the first sealing ring 21. In this way, by providing the first sealing ring 21, it is convenient for the solenoid valve push rod 23 to drive the sealing ring to seal or open the passage between the natural gas inlet passage 112 and the central cavity 12, so as to switch to use different gases for combustion.

[0030] See also Figure 1 and Figure 2 The first sealing ring 21 is a square block as a whole, and a countersunk hole is formed on the first sealing ring 21, through which the first sealing ring 21 is tightly matched with the solenoid valve push rod 23. In this way, by making the first sealing ring 21 a square block as a whole, it is convenient to completely seal the passage between the natural gas intake passage and the central cavity 12, and a countersunk hole is formed on the first sealing ring 21, so that the first sealing ring 21 can be installed on the solenoid valve push rod 23 through the countersunk hole.

[0031] See also Figure 1 and Figure 2 , the first sealing ring 21 is made of rubber. In this way, the first sealing ring 21 is made of rubber, which is convenient for utilizing the plasticity of rubber and improving the sealing effect. One end of the solenoid valve push rod 23 is slidably connected to the solenoid valve cover 2, and the other end is located in the natural gas intake channel 112. A convex ring 231 is formed at the end of the solenoid valve push rod 23 located in the natural gas intake channel 112, and the convex ring 231 can abut against the first sealing ring 21. By forming a convex ring 231 at the end of the solenoid valve push rod 23 located in the natural gas intake channel 112, it is convenient to squeeze the first sealing ring 21 through the convex ring 231 when the first sealing ring 21 seals the channel between the natural gas intake channel 112 and the central cavity 12, thereby improving the sealing effect.

[0032] See also Figure 1 and Figure 2The cross section of the central cavity 12 is quadrilateral, and through holes communicating with the common air inlet channel 11, the natural gas air inlet channel 112, and the air outlet channel 13 are formed on the three side walls of the central cavity 12. In this way, by making the cross section of the central cavity 12 quadrilateral and forming through holes communicating with the common air inlet channel 11, the natural gas air inlet channel 112, and the air outlet channel 13 on the three side walls of the central cavity 12, it is convenient for the fuel gas to enter the engine through the air outlet channel 13.

[0033] See also Figure 1 and Figure 2 The natural gas intake passage 112 is located above the central cavity 12, and a through hole communicating with the common intake passage 11 is formed on one side of the natural gas intake passage 112. In this way, a through hole communicating with the common intake passage 11 is formed on one side of the natural gas intake passage 112, so that when natural gas is used, the natural gas entering from the common intake passage 11 can enter the inner cavity from the natural gas intake passage 112, thereby ensuring the flow rate of the natural gas and ensuring the normal operation of the engine.

[0034] See also Figure 1 and Figure 2 The solenoid valve cover 2 is connected to the top of the valve seat 1, a groove is formed on the top of the valve seat 1, a second sealing ring 22 is installed in the groove, and the second sealing ring 22 is located between the solenoid valve cover 2 and the valve seat 1. In this way, by forming a groove on the top of the valve seat 1 and installing the second sealing ring 22 in the groove, the sealing effect between the solenoid valve cover 2 and the valve seat 1 can be ensured by the second sealing ring 22. The second sealing ring 22 is an O-type sealing ring.

[0035] During operation, when the gas switch valve connected to the air inlet end of the conversion valve is slid to the side using natural gas, the solenoid valve push rod 23 receives a corresponding signal, so that the solenoid valve push rod 23 moves up, so that the channel between the natural gas intake channel 112 and the central cavity 12 is opened, so that the natural gas can enter the central cavity 12 from the common intake channel 11 and the natural gas intake channel 112 at the same time, and then enter the engine from the outlet channel 13; when the gas switch valve is slid to the side using liquefied petroleum gas, the solenoid valve push rod 23 receives a corresponding signal, so that the solenoid valve push rod 23 moves down, so that the channel between the natural gas intake channel 112 and the central cavity 12 is closed, so that the liquefied petroleum gas can only enter the central cavity 12 from the common intake channel 11, and then enter the engine from the outlet channel 13.

[0036] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A gas switching valve, characterized in that: The invention comprises a valve seat (1), a solenoid valve cover (2) and a solenoid valve push rod (23); a common air inlet channel (11), a natural gas air inlet channel (112), an air outlet channel (13) and a central cavity (12) are formed on the valve seat (1); the common air inlet channel (11), the natural gas air inlet channel (112), the air outlet channel (13) and the central cavity (12) are communicated with each other; the solenoid valve push rod (23) is slidably connected to the solenoid valve cover (2) and can slide in the natural gas air inlet channel (112); the channel between the natural gas air inlet channel (112) and the central cavity (12) is opened and closed by the solenoid valve push rod (23).

2. The gas switching valve according to claim 1, characterized in that: A first sealing ring (21) is installed on the solenoid valve push rod (23), and the passage between the natural gas intake passage (112) and the central cavity (12) is opened and closed by the first sealing ring (21).

3. The gas switching valve according to claim 2, characterized in that: The first sealing ring (21) is in the form of a square block as a whole. A countersunk hole is formed on the first sealing ring (21), and the first sealing ring (21) is tightly matched with the solenoid valve push rod (23) through the countersunk hole.

4. The gas switching valve according to claim 2, characterized in that: The first sealing ring (21) is made of rubber.

5. The gas switching valve according to claim 2, characterized in that: One end of the solenoid valve push rod (23) is slidably connected to the solenoid valve cover (2), and the other end is located in the natural gas intake passage (112). A convex ring (231) is formed at the end of the solenoid valve push rod (23) located in the natural gas intake passage (112), and the convex ring (231) can abut against the first sealing ring (21).

6. The gas switching valve according to claim 1, characterized in that: The cross section of the central cavity (12) is quadrilateral, and through holes communicating with the common air inlet channel (11), the natural gas air inlet channel (112) and the air outlet channel (13) are respectively formed on the three side walls of the central cavity (12).

7. The gas switching valve according to claim 1, characterized in that: The natural gas intake channel (112) is located above the central cavity (12), and a through hole communicating with the common intake channel (11) is formed on one side of the natural gas intake channel (112).

8. The gas switching valve according to any one of claims 1 to 7, characterized in that: The solenoid valve cover (2) is connected above the valve seat (1); a groove is formed on the top of the valve seat (1); a second sealing ring (22) is installed in the groove; the second sealing ring (22) is located between the solenoid valve cover (2) and the valve seat (1).

9. The gas switching valve according to claim 8, characterized in that: The second sealing ring (22) is an O-type sealing ring.

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