Bidirectional valve of fuel tank

Abstract

The utility model relates to the technical field of two-way valves, and discloses a fuel tank two-way valve which comprises two outer shells, connecting flanges are fixedly connected to the outer side faces of the outer shells, the two connecting flanges are connected with each other through fasteners, filling blocks are arranged in the outer shells, supporting frames are fixedly connected to the side faces of the filling blocks, and the supporting frames are fixedly connected to the outer side faces of the outer shells. The supporting frame is clamped with the outer shell, the filling block is provided with a plurality of valve element assemblies, the valve element assemblies are installed in the positive and negative directions, each valve element assembly comprises an installation shell, the bottom of each installation shell is fixedly connected with a lower check block, and a filter cartridge is arranged in each installation shell. According to the two-way valve, through the arranged valve element assembly, the pressure on the inner side and the pressure on the outer side can be balanced, meanwhile, impurities in gas can be filtered through the filter cartridge, the vent holes are prevented from being blocked, and it is guaranteed that the two-way valve can be normally used and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of two-way valves, in particular to a two-way valve for a fuel tank. Background Art

[0002] A two-way valve is usually installed between the fuel tank and the carbon canister of an automobile to maintain the pressure balance inside the fuel tank, reduce the emission of oil and gas inside the fuel tank, and reduce the load of the carbon canister for adsorbing oil and gas. When the pressure inside the fuel tank is relatively high, one channel of the two-way valve opens, allowing the oil and gas inside the fuel tank to relieve pressure to the carbon canister; when the pressure inside the fuel tank is relatively low, the other channel of the two-way valve opens, allowing external air to enter the fuel tank.

[0003] However, during use, impurities in gasoline gradually accumulate and block the ventilation ports of the two-way valve, which easily affects the normal use of the two-way valve and is not convenient to use. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a two-way valve for a fuel tank is proposed. By means of the provided spool assembly, while balancing the pressures on both the inside and outside, the filter cartridge can be used to filter impurities in the gas, preventing the ventilation holes from being blocked, ensuring the normal use of the two-way valve, and being convenient to use.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A two-way valve for a fuel tank includes two outer shells. A connecting flange is fixedly connected to the outer side surface of the outer shell, and the two connecting flanges are connected to each other through fasteners. A filling block is arranged inside the outer shell. A supporting frame is fixedly connected to the side surface of the filling block, and the supporting frame is engaged with the outer shell. A plurality of spool assemblies are arranged on the filling block, and the plurality of spool assemblies are installed in a positive and negative direction. The spool assembly includes an installation shell. A lower stop block is fixedly connected to the bottom of the installation shell. A filter cartridge is arranged inside the installation shell. An upper stop block is arranged above the filter cartridge inside the installation shell. The upper stop block and the lower stop block are both provided with ventilation holes and installation holes. A blocking elastic cover is arranged on the upper stop block. The shape of the blocking elastic cover is conical, and the blocking elastic cover covers all the ventilation holes. A connecting screw rod is fixedly connected to the lower part of the blocking elastic cover. The connecting screw rod passes through the upper stop block, the filter cartridge, and the lower stop block. A nut is threadedly connected to the end of the connecting screw rod. A locking metal strip is arranged at the end of the connecting screw rod and below the nut. By means of the provided spool assembly, while balancing the pressures on both the inside and outside, the filter cartridge can be used to filter impurities in the gas, preventing the ventilation holes from being blocked, ensuring the normal use of the two-way valve, and being convenient to use.

[0006] Furthermore, there are a plurality of fasteners, and they are evenly arranged in a circumferential manner. The fasteners include bolts and nuts.

[0007] Furthermore, a communication pipe is fixedly connected to the outer housing.

[0008] Furthermore, the filter cartridge is cylindrical in shape.

[0009] Furthermore, the nut is located below the lower stop block.

[0010] Furthermore, the installation housing is tubular in shape and has the same height as the filling block.

[0011] Furthermore, a plurality of the valve core assemblies are evenly arranged in a circumference.

[0012] Furthermore, a clamping groove is provided in the outer housing, and the support frame has an annular shape.

[0013] The utility model has the following beneficial effects:

[0014] The two-way valve for fuel tank proposed by the utility model can, through the provided valve core assembly, balance the pressures on both the inside and outside sides, and at the same time, use the filter cartridge to filter impurities in the gas, avoid blockage of the ventilation holes, ensure the normal use of the two-way valve, and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] Figure 2 is a schematic structural diagram of the disassembled state of the utility model;

[0017] Figure 3 is a schematic structural diagram of the valve core assembly of the utility model;

[0018] Figure 4 is a schematic structural diagram of the upper stop block of the utility model.

[0019] LEGEND DESCRIPTION:

[0020] 1. Outer housing; 101. Communication pipe; 102. Fastener; 103. Connection flange; 2. Filling block; 201. Support frame; 3. Valve core assembly; 301. Blocking elastic cover; 302. Connection screw; 303. Upper stop block; 304. Filter cartridge; 305. Lower stop block; 306. Nut; 307. Locking metal strip; 308. Installation housing; 3031. Ventilation hole; 3032. Installation hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Referring to Figures 1 - 4 , an embodiment provided by the present invention: a two-way fuel tank valve, including two outer shells 1, a communication pipe 101 is fixedly connected to the outer shell 1, a connection flange 103 is fixedly connected to the outer side surface of the outer shell 1, and the two connection flanges 103 are connected to each other through fasteners 102. There are multiple fasteners 102 and they are evenly arranged in a circumferential manner. The fasteners 102 include bolts and nuts. A filling block 2 is arranged inside the outer shell 1. A support frame 201 is fixedly connected to the side surface of the filling block 2. The support frame 201 is engaged with the outer shell 1. There is a card slot inside the outer shell 1. The shape of the support frame 201 is circular. A plurality of valve core components 3 are arranged on the filling block 2. The plurality of valve core components 3 are evenly arranged in a circumferential manner. The plurality of valve core components 3 are installed in a positive and negative direction.

[0023] Refer to Figure 1 , Figure 2 , the two outer shells 1 can be connected together by using the fasteners 102. The filling block 2 is used to block the flow of gas so that the gas can flow to the valve core component 3. The support frame 201 can improve the sealing performance of the connection between the two outer shells 1.

[0024] The valve core component 3 includes an installation shell 308. The shape of the installation shell 308 is tubular and is the same height as the filling block 2. A lower block 305 is fixedly connected to the bottom of the installation shell 308. A filter cylinder 304 is arranged inside the installation shell 308. The shape of the filter cylinder 304 is cylindrical. An upper block 303 is arranged above the filter cylinder 304 inside the installation shell 308. The upper block 303 and the lower block 305 are both provided with air holes 3031 and installation holes 3032. A blocking elastic cover 301 is arranged on the upper block 303. The shape of the blocking elastic cover 301 is conical. The blocking elastic cover 301 covers all the air holes 3031. A connection screw 302 is fixedly connected to the lower part of the blocking elastic cover 301. The connection screw 302 passes through the upper block 303, the filter cylinder 304, and the lower block 305. A nut 306 is threadedly connected to the end of the connection screw 302. The nut 306 is located below the lower block 305. A locking metal bar 307 is arranged at the end of the connection screw 302 and below the nut 306.

[0025] Refer to Figure 3 , Figure 4, external gas can enter through the air holes 3031 of the lower baffle 305, and then, under the filtering action of the filter cartridge 304, impurities in the gas can be filtered to prevent the air holes 3031 of the upper baffle 303 from being blocked, ensuring that the blocking elastic cover 301 can be opened and closed normally. When the air pressure at the bottom of the blocking elastic cover 301 is greater than that at the top of the blocking elastic cover 301, the edge of the blocking elastic cover 301 can tilt upward, thereby releasing the gas. Since the valve core assembly 3 is installed in both forward and reverse directions, the air pressure on both sides can be balanced, achieving a balancing effect and ensuring the normal use of the two-way valve, which is convenient to use.

[0026] During operation, the two outer shells 1 can be connected together using the fastener 102. The filling block 2 is used to block the flow of gas, enabling the gas to flow to the valve core assembly 3. The support frame 201 can improve the sealing performance of the connection between the two outer shells 1. External gas can enter through the air holes 3031 of the lower baffle 305, and then, under the filtering action of the filter cartridge 304, impurities in the gas can be filtered to prevent the air holes 3031 of the upper baffle 303 from being blocked, ensuring that the blocking elastic cover 301 can be opened and closed normally. When the air pressure at the bottom of the blocking elastic cover 301 is greater than that at the top of the blocking elastic cover 301, the edge of the blocking elastic cover 301 can tilt upward, thereby releasing the gas. Since the valve core assembly 3 is installed in both forward and reverse directions, the air pressure on both sides can be balanced, achieving a balancing effect and ensuring the normal use of the two-way valve, which is convenient to use. Also, by using the nut 306, the blocking elastic cover 301 and the connecting screw 302 can be removed, enabling the filter cartridge 304 to be taken out, thus facilitating the replacement of the filter cartridge 304 and the subsequent maintenance operations. By setting the valve core assembly 3, while balancing the pressure inside and outside, the filter cartridge 304 can also be used to filter impurities in the gas, preventing the air holes 3031 from being blocked and ensuring the normal use of the two-way valve, which is convenient to use.

[0027] Working principle: The two outer shells 1 can be connected together using the fastener 102. The filling block 2 is used to block the flow of gas so that the gas can flow to the valve core assembly 3. The support frame 201 can improve the sealing performance of the connection between the two outer shells 1. External gas can enter through the air holes 3031 of the lower baffle 305, and then, under the filtering action of the filter cartridge 304, impurities in the gas can be filtered to prevent the air holes 3031 of the upper baffle 303 from being blocked, ensuring that the blocking elastic cover 301 can be opened and closed normally. When the air pressure at the bottom of the blocking elastic cover 301 is greater than that at the top of the blocking elastic cover 301, the edge of the blocking elastic cover 301 can tilt upward, thereby releasing the gas. Since the valve core assembly 3 is installed in both forward and reverse directions, the air pressure on both sides can be balanced, achieving a balancing effect and ensuring the normal use of the two-way valve, which is convenient to use. Moreover, by using the nut 306, the blocking elastic cover 301 and the connecting screw 302 can be removed, and then the filter cartridge 304 can be taken out, facilitating the replacement of the filter cartridge 304 and the subsequent maintenance operations.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Two-way valve for fuel tank, characterized by: The invention comprises two outer shells (1), the outer side surfaces of the outer shells (1) are fixedly connected with connection flanges (103), the two connection flanges (103) are connected to each other via fasteners (102), a filling block (2) is arranged inside the outer shell (1), the side surfaces of the filling block (2) are fixedly connected with a support frame (201), the support frame (201) is engaged with the outer shell (1), a plurality of valve core assemblies (3) are arranged on the filling block (2), the plurality of valve core assemblies (3) are installed in forward and reverse directions, the valve core assemblies (3) comprise an installation shell (308), the bottom of the installation shell (308) is fixedly connected with a lower stopper (305), a filter cartridge (304) is arranged inside the installation shell (308), and a filter cartridge (304) is located inside the installation shell (308) and at the filter cartridge (3 04), an upper block (303) is provided above the upper block (303), and both the upper block (303) and the lower block (305) are provided with air holes (3031) and mounting holes (3032); a blocking elastic cover (301) is provided on the upper block (303), and the blocking elastic cover (301) is in a conical shape, and the blocking elastic cover (301) covers all the air holes (3031); a connecting screw (302) is fixedly connected to the lower part of the blocking elastic cover (301), and the connecting screw (302) passes through the upper block (303), the filter cartridge (304), and the lower block (305); a nut (306) is threadedly connected to the end of the connecting screw (302), and a locking metal strip (307) is provided at the end of the connecting screw (302) and below the nut (306).

2. The two-way valve for fuel tank according to claim 1, characterized in that: There are a plurality of fasteners (102) which are evenly arranged around a circumference, and the fasteners (102) include bolts and nuts.

3. The two-way valve for fuel tank according to claim 1, characterized in that: A communication pipe (101) is fixedly connected to the outer shell (1).

4. The two-way valve for fuel tank according to claim 1, characterized in that: The filter cartridge (304) is cylindrical in shape.

5. The two-way valve for fuel tank according to claim 1, characterized in that: The nut (306) is located below the lower stopper (305).

6. The two-way valve for fuel tank according to claim 1, characterized in that: The mounting shell (308) is tubular in shape and has the same height as the filling block (2).

7. The two-way valve for fuel tank according to claim 1, characterized in that: The plurality of valve core components (3) are evenly arranged around the circumference.

8. The two-way valve for a fuel tank according to claim 1, characterized in that: The outer shell (1) has a slot therein, and the supporting frame (201) is in the shape of a circular ring.

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