Double-layer switch valve structure

Abstract

The utility model relates to a double-layer switch valve structure which comprises a valve body, a first flange plate, a second flange plate, a ball valve core and a control mechanism, a channel is arranged in the valve body, and a first sealing ring, a first annular cavity and a second sealing ring are arranged between the first flange plate and the valve body. A third sealing ring, a second annular cavity and a fourth sealing ring are arranged between the second flange plate and the valve body, a third through hole communicated with the second annular cavity and the first annular cavity is formed in the valve body, a fourth through hole communicated with the first annular cavity is formed in the first flange plate, and a fifth through hole communicated with the second annular cavity is formed in the second flange plate. The double-layer switch valve structure is provided with the inner layer channel and the outer layer channel, the inner layer channel is a fuel supply flow channel, the outer layer channel is a leakage detection channel used for detecting fuel leakage, nitrogen is introduced into the outer layer channel, and the safe and anti-explosion effects can be achieved. The double-layer switch valve structure further has the advantages of being compact in structure and easy to manufacture.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injection systems, and particularly relates to a double-layer switch valve structure. Background Art

[0002] Some internal combustion engines use methanol as fuel. As a new energy fuel with low carbon and renewable properties, methanol has the characteristics of high combustion efficiency and clean emissions. A switch valve is usually provided on the methanol fuel delivery pipeline to control the opening and closing of the methanol fuel supply end. For example, when disassembling and repairing the methanol injector, it is necessary to manually close the switch valve to cut off the supply of methanol fuel.

[0003] The switch valves applied to methanol fuel delivery pipelines in the prior art have the following technical problems: The switch valves are usually ball valves, and there is a risk of methanol fuel leakage. After methanol fuel leakage occurs at the switch valve, it is often not detected in time, posing a serious safety hazard. Summary of the Utility Model

[0004] The purpose of the utility model is to propose a double-layer switch valve structure to alleviate or eliminate at least one of the above technical problems.

[0005] A double-layer switch valve structure described in the utility model includes a valve body, a first flange, a second flange, a ball valve core and a control mechanism;

[0006] A vertically penetrating channel is provided in the valve body, the ball valve core is installed in the channel, the control mechanism is connected to the ball valve core, and the control mechanism is used to control the ball valve core to control the on-off of the channel;

[0007] The first flange is fixedly connected to the lower side of the valve body. A first through hole penetrating up and down is provided on the first flange. The upper end of the first through hole is communicated with the lower end of the channel. A first sealing ring, a first annular cavity surrounding the first sealing ring and a second sealing ring surrounding the first annular cavity are provided between the first flange and the valve body. The first sealing ring surrounds the periphery of the communicating part between the first through hole and the channel;

[0008] The second flange is fixedly connected to the upper side of the valve body. A second through hole penetrating up and down is provided on the second flange. The lower end of the second through hole is communicated with the upper end of the channel. A third sealing ring, a second annular cavity surrounding the third sealing ring and a fourth sealing ring surrounding the second annular cavity are provided between the second flange and the valve body. The third sealing ring surrounds the periphery of the communicating part between the second through hole and the channel;

[0009] A third through-hole is provided in the valve body, with its upper and lower ends communicating with the second annular cavity and the first annular cavity respectively. A fourth through-hole is provided in the first flange plate, which penetrates vertically and has its upper end communicating with the first annular cavity. A fifth through-hole is provided in the second flange plate, which penetrates vertically and has its lower end communicating with the second annular cavity.

[0010] Optionally, the operating mechanism includes an operating rod and an operating handle. The left end of the operating rod is connected to the ball valve core, and the right end of the operating rod extends out of the valve body and is connected to the operating handle. The operating handle is used to drive the operating rod to rotate so as to drive the ball valve core to rotate.

[0011] Optionally, a sixth through-hole is provided in the second flange plate, which penetrates vertically. A third annular cavity surrounding the outer periphery of the operating rod and a seventh through-hole communicating the third annular cavity with the lower end of the sixth through-hole are provided between the operating rod and the valve body.

[0012] Optionally, the distance between the upper end of the sixth through-hole and the central axis of the second through-hole is the same as the distance between the upper end of the fifth through-hole and the central axis of the second through-hole.

[0013] Optionally, the valve body includes a valve body main body and a mounting block detachably and fixedly connected to the right side of the valve body main body. The channel is provided in the valve body main body. A stepped through-hole penetrating left and right is provided in the mounting block. The aperture of the left section of the stepped through-hole is larger than that of the right section of the stepped through-hole. The operating rod includes an operating rod body with its left end connected to the ball valve core and a transfer rod cooperating with the right section of the stepped through-hole. A slot is provided at the left end of the transfer rod, and the right end portion of the operating rod body is inserted into the slot. The right end of the transfer rod extends out of the mounting block and is connected to the operating handle. The third annular cavity is formed between the left section of the stepped through-hole and the operating rod.

[0014] Optionally, a fifth sealing ring surrounding the communicating part between the sixth through-hole and the seventh through-hole is provided between the mounting block and the second flange plate. A sixth sealing ring surrounding the left end periphery of the stepped through-hole is provided between the mounting block and the valve body main body. A seventh sealing ring is provided between the right section of the stepped through-hole and the transfer rod.

[0015] Optionally, an outward flange is provided at the left end of the transfer rod, which supports rightward on the stepped surface of the stepped through-hole.

[0016] Optionally, a stop pin for defining the starting point and / or the ending point of the stroke of the operating handle is provided on the right side of the valve body.

[0017] Optionally, a first sealing ring mounting groove surrounding the lower end of the first through hole and a second sealing ring mounting groove surrounding the first sealing ring mounting groove are provided on the lower side surface of the first flange, and the lower end of the fourth through hole is located in the area between the first sealing ring mounting groove and the second sealing ring mounting groove.

[0018] Optionally, pipeline connection holes are provided on both the first flange and the second flange.

[0019] The double-layer switch valve structure proposed by the present utility model is designed with inner and outer two-layer channel structures. The inner channel is a fuel supply channel, and the outer channel is a leakage detection channel. The outer channel can be used to detect fuel leakage. After introducing nitrogen into the outer channel, it also has the characteristics of safety and explosion protection. The double-layer switch valve structure has better safety performance and explosion protection performance, and also has the characteristics of compact structure and easy manufacturing. Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of the double-layer switch valve structure described in some embodiments;

[0021] Figure 2 It is a top view of the double-layer switch valve structure described in some embodiments;

[0022] Figure 3 It is a right view of the double-layer switch valve structure described in some embodiments.

[0023] Wherein, 1 - valve body main body; 2 - channel; 3 - ball valve core; 4 - operating rod body; 5 - mounting block; 6 - adapter rod; 7 - operating handle; 8 - retaining piece; 9 - nut; 10 - first flange; 11 - second flange; 12 - first annular cavity; 13 - third through hole; 14 - second annular cavity; 15 - fourth through hole; 16 - fifth through hole; 17 - first sealing ring; 18 - second sealing ring; 19 - third sealing ring; 20 - fourth sealing ring; 21 - eighth sealing ring; 22 - ninth sealing ring; 23 - first through hole; 24 - second through hole; 25 - third annular cavity; 26 - sixth through hole; 27 - fifth sealing ring; 28 - sixth sealing ring; 29 - seventh sealing ring; 30 - first bolt; 31 - stop pin; 32 - second bolt; 33 - third bolt; 34 - fourth bolt. Detailed Embodiments

[0024] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0025] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the layout type of its components may also be more complex.

[0026] As Figures 1 to 3 shown, a double-layer switch valve structure includes a valve body, a first flange 10, a second flange 11, a ball valve core 3, and a control mechanism; a vertically penetrating channel 2 is provided in the valve body, the ball valve core 3 is installed in the channel 2, the control mechanism is connected to the ball valve core 3, and the control mechanism is used to control the ball valve core 3 to control the on-off of the channel 2; the first flange 10 is fixedly connected to the lower side of the valve body, a vertically penetrating first through hole 23 is provided on the first flange 10, the upper end of the first through hole 23 is communicated with the lower end of the channel 2, a first sealing ring 17, a first annular cavity 12 surrounding the first sealing ring 17, and a second sealing ring 18 surrounding the first annular cavity 12 are provided between the first flange 10 and the valve body, and the first sealing ring 17 surrounds the periphery of the communicating part between the first through hole 23 and the channel 2; the second flange 11 is fixedly connected to the upper side of the valve body, a vertically penetrating second through hole 24 is provided on the second flange 11, the lower end of the second through hole 24 is communicated with the upper end of the channel 2, a third sealing ring 19, a second annular cavity 14 surrounding the third sealing ring 19, and a fourth sealing ring 20 surrounding the second annular cavity 14 are provided between the second flange 11 and the valve body, and the third sealing ring 19 surrounds the periphery of the communicating part between the second through hole 24 and the channel 2; a third through hole 13 is provided in the valve body, the upper and lower ends of which are respectively communicated with the second annular cavity 14 and the first annular cavity 12, a fourth through hole 15 that is vertically penetrating and the upper end of which is communicated with the first annular cavity 12 is provided on the first flange 10, and a fifth through hole 16 that is vertically penetrating and the lower end of which is communicated with the second annular cavity 14 is provided on the second flange 11.

[0027] With the above technical solution, the double-layer switch valve structure can be connected to the fuel pipeline by using the first flange 10 and the second flange 11, and the channel 2 in the valve body is the flow channel for the fuel. The operator drives the spherical valve core 3 to rotate by using the operating mechanism, and can control the opening and closing of the double-layer switch valve structure, thereby controlling the on-off of the fuel pipeline.

[0028] In the above technical solution, a first detection channel is formed by connecting the fourth through hole 15, the first annular cavity 12, the third through hole 13, the second annular cavity 14 and the fifth through hole 16. The first detection channel is detected by the probe of the fuel leakage detector, and an alarm can be given in time when fuel leakage occurs. Setting the first detection channel facilitates detecting whether there is fuel leakage between the valve body and the first flange 10 and between the valve body and the second flange 11. In specific use, the double-layer switch valve structure can be used in cooperation with a double-layer fuel pipeline. The first detection channel is communicated with the outer channel of the double-layer fuel pipeline. By detecting one of the first detection channel and the outer channel with the probe of the fuel leakage detector, fuel leakage can be detected in time. In actual use, nitrogen can be introduced into the first detection channel and the outer channel, which has the characteristics of safety and explosion prevention. With the above technical solution, it helps to improve the safety performance and explosion-proof performance of the double-layer switch valve structure.

[0029] Moreover, double-layer sealing rings are provided between the valve body and the first flange 10 and between the valve body and the second flange 11, which can ensure the sealing performance of the double-layer switch valve structure and help to improve the safety performance of the double-layer switch valve structure.

[0030] In some embodiments, the operating mechanism includes an operating rod and an operating handle 7. The left end of the operating rod is connected to the spherical valve core 3, and the right end of the operating rod extends out of the valve body and is connected to the operating handle 7. The operating handle 7 is used to drive the operating rod to rotate to drive the spherical valve core 3 to rotate. Setting the operating handle 7 facilitates the operator to open and close the double-layer switch valve structure.

[0031] In some embodiments, a sixth through hole 26 that penetrates up and down is provided on the second flange 11. A third annular cavity 25 surrounding the operating rod and a seventh through hole communicating the third annular cavity 25 and the lower end of the sixth through hole are provided between the operating rod and the valve body. Setting the third annular cavity 25, the seventh through hole and the sixth through hole 26 to form a second detection channel facilitates detecting whether there is fuel leakage between the operating rod and the valve body.

[0032] In some embodiments, the distance between the upper end of the sixth through-hole 26 and the central axis of the second through-hole 24 is the same as the distance between the upper end of the fifth through-hole 16 and the central axis of the second through-hole 24. With the above technical solution, the upper ends of the sixth through-hole 26 and the fifth through-hole 16 can communicate with the outer channel of the same double-layer fuel pipeline. In specific implementation, the sixth through-hole 26 can be set as an inclined hole that slopes leftward from bottom to top.

[0033] In some embodiments, the valve body includes a valve body main body 1 and a mounting block 5 detachably and fixedly connected to the right side of the valve body main body 1. The channel is arranged in the valve body main body 1. A stepped through-hole that penetrates left and right is arranged in the mounting block 5. The aperture of the left section of the stepped through-hole is larger than the aperture of the right section of the stepped through-hole. The operating rod includes an operating rod body 4 with its left end connected to the ball valve core 3 and a transfer rod 6 that cooperates with the right section of the stepped through-hole. A slot is arranged at the left end of the transfer rod 6, and the right end portion of the operating rod body 4 is inserted into the slot. The right end of the transfer rod 6 extends out of the mounting block 5 and is connected to the operating handle 7. A third annular cavity 25 is formed between the left section of the stepped through-hole and the operating rod. Splitting the valve body into the valve body main body 1 and the mounting block 5 facilitates the realization of the second detection channel. Splitting the operating rod into the operating rod body 4 and the transfer rod 6 helps to reduce the manufacturing difficulty of the double-layer switch valve structure.

[0034] In some embodiments, a fifth sealing ring 27 is arranged between the mounting block 5 and the second flange 11, surrounding the periphery of the communicating part between the sixth through-hole 26 and the seventh through-hole. A sixth sealing ring 28 is arranged between the mounting block 5 and the valve body main body 1, surrounding the periphery of the left end of the stepped through-hole. A seventh sealing ring 29 is arranged between the right section of the stepped through-hole and the transfer rod 6. Arranging the fifth sealing ring 27, the sixth sealing ring 28, and the seventh sealing ring 29 helps to ensure the sealing performance of the double-layer switch valve structure.

[0035] In some embodiments, an outer flange is arranged at the left end of the transfer rod 6, which supports rightward on the stepped surface of the stepped through-hole. Arranging the outer flange can prevent the transfer rod 6 from protruding out of the mounting block 5. Further, a snap ring groove and a threaded section are arranged at the right part of the transfer rod 6. A limit snap ring is installed in the snap ring groove, and the limit snap ring is used to limit the displacement of the transfer rod 6 moving leftward relative to the mounting block 5. The operating handle 7 is fixedly connected to the threaded section through a retaining piece 8 and a nut 9.

[0036] In some embodiments, a stop pin 31 for limiting the starting point and / or the ending point of the stroke of the operating handle 7 is arranged on the right side of the valve body. Arranging the stop pin 31 helps to reduce the operation difficulty of the double-layer switch valve structure and improve the operation precision of the double-layer switch valve structure.

[0037] In some embodiments, on the lower side surface of the first flange 10, there are provided a first sealing ring 17 mounting groove surrounding the periphery of the lower end of the first through hole 23 and a second sealing ring 18 mounting groove surrounding the periphery of the first sealing ring 17 mounting groove. The lower end of the fourth through hole 15 is located in the area between the first sealing ring 17 mounting groove and the second sealing ring 18 mounting groove. The first sealing ring 17 mounting groove is used for mounting the eighth sealing ring 21, and the second sealing ring groove is used for mounting the ninth sealing ring 22. The eighth sealing ring 21 and the ninth sealing ring 22 can form a good seal between the double-layer switch valve structure and the double-layer fuel pipeline connected to the lower side of the double-layer switch valve structure.

[0038] In some embodiments, pipeline connection holes are provided on both the first flange 10 and the second flange 11. The pipeline connection holes are used for connecting the double-layer fuel pipeline.

[0039] As a specific example, the first flange 10 and the valve body main body 1 can be fixedly connected by the first bolt 30, the second flange 11 and the valve body main body 1 can be fixedly connected by the third bolt 33, the second flange 11 and the mounting block 5 can be fixedly connected by the second bolt 32, and the mounting block 5 and the valve body main body 1 can be fixedly connected by the fourth bolt 34. In order to avoid interference problems, a counterbore structure for accommodating the bolt head can be provided at the bolt mounting holes of each bolt.

[0040] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0041] In the description of the present invention, it should be understood that the orientations indicated by terms such as "upper", "lower", "left", "right", etc. are based on the Figure 1 coordinate system in the attached drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

Claims

1. A double-layer switch valve structure, characterized in that: It includes a valve body, a first flange, a second flange, a ball valve core and an operating mechanism; The valve body is provided with a vertically penetrating passage, the ball valve core is installed in the passage, the operating mechanism is connected to the ball valve core, and the operating mechanism is used to operate the ball valve core to control the on-off of the passage; The first flange is fixedly connected to the lower side of the valve body, a first through hole is provided on the first flange, the upper end of the first through hole is communicated with the lower end of the channel, a first sealing ring, a first annular cavity surrounding the first sealing ring and a second sealing ring surrounding the first annular cavity are provided between the first flange and the valve body, and the first sealing ring surrounds the periphery of the communicating portion between the first through hole and the channel; The second flange is fixedly connected to the upper side of the valve body, the second flange is provided with a second through hole which passes through from top to bottom, the lower end of the second through hole is communicated with the upper end of the channel, a third sealing ring, a second annular cavity surrounding the periphery of the third sealing ring, and a fourth sealing ring surrounding the periphery of the second annular cavity are provided between the second flange and the valve body, and the third sealing ring surrounds the periphery of the communicating portion between the second through hole and the channel; The valve body is provided with a third through hole whose upper and lower ends are respectively connected to the second annular cavity and the first annular cavity; the first flange is provided with a fourth through hole which passes through from top to bottom and is connected to the first annular cavity at the upper end; the second flange is provided with a fifth through hole which passes through from top to bottom and is connected to the second annular cavity at the lower end.

2. The double-layer switch valve structure according to claim 1, characterized in that: The operating mechanism includes an operating rod and an operating handle, the left end of the operating rod is connected to the ball valve core, the right end of the operating rod extends out of the valve body and is connected to the operating handle, and the operating handle is used to drive the operating rod to rotate to drive the ball valve core to rotate.

3. The double-layer switch valve structure according to claim 2 is characterized in that: The second flange is provided with a sixth through hole which passes through from top to bottom, and a third annular cavity surrounding the outer periphery of the operating rod and a seventh through hole which connects the third annular cavity and the lower end of the sixth through hole are provided between the operating rod and the valve body.

4. The double-layer switch valve structure according to claim 3 is characterized in that: The distance between the upper end of the sixth through hole and the central axis of the second through hole is consistent with the distance between the upper end of the fifth through hole and the central axis of the second through hole.

5. The double-layer switch valve structure according to claim 3, characterized in that: The valve body includes a valve body main body and a mounting block detachably fixedly connected to the right side of the valve body main body, the channel is arranged in the valve body main body, a stepped through hole is arranged in the mounting block and passes through the left and right sides, the aperture of the left section of the stepped through hole is larger than the aperture of the right section of the stepped through hole, the joystick includes an joystick main body connected to the ball valve core at the left end and a transfer rod matched with the right section of the stepped through hole, the left end of the transfer rod is provided with a slot, the right end of the joystick main body is inserted in the slot, the right end of the transfer rod extends out of the mounting block and is connected to the joystick, and the third annular cavity is formed between the left section of the stepped through hole and the joystick.

6. The double-layer switch valve structure according to claim 5, characterized in that: A fifth sealing ring is arranged between the mounting block and the second flange plate and surrounds the periphery of the connecting portion between the sixth through hole and the seventh through hole, a sixth sealing ring is arranged between the mounting block and the valve body and surrounds the periphery of the left end of the step through hole, and a seventh sealing ring is arranged between the right section of the step through hole and the transfer rod.

7. The double-layer switch valve structure according to claim 5, characterized in that: The left end of the transfer rod is provided with an outer flange which is supported rightward on the step surface of the step through hole.

8. The double-layer switch valve structure according to claim 2, characterized in that: A stop pin for defining a stroke starting point and / or a stroke end point of the operating handle is arranged on the right side of the valve body.

9. The double-layer switch valve structure according to claim 1, characterized in that: A first sealing ring installation groove surrounding the lower end of the first through hole and a second sealing ring installation groove surrounding the first sealing ring installation groove are provided on the lower side surface of the first through hole, and the lower end of the fourth through hole is located in the area between the first sealing ring installation groove and the second sealing ring installation groove.

10. The double-layer switch valve structure according to claim 1, characterized in that: The first flange and the second flange are both provided with pipeline connecting holes.

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