External valve body and oil tank

Abstract

The invention discloses an external valve body and an oil tank, and relates to the technical field of sealing valve bodies, the external valve body comprises a framework main body, a rubber coating structure and a sealing ring, a mounting table is arranged around the outer side wall of the framework main body, the rubber coating structure comprises a sealing part and a connecting part which are connected with each other, the sealing part wraps the outer side face of the mounting table, and the connecting part is located on one side of the sealing part; an annular mounting groove is formed in the side, close to the target piece, of the mounting table and extends to the outer side face of the mounting table in the radial direction of the mounting table, the side, close to the framework body, of the connecting part and the side wall of the mounting groove are arranged at intervals, and the end face, close to the target piece, of the mounting table and the target piece are arranged at intervals. The side, away from the axis of the framework body, of the sealing ring abuts against the connecting part, the sealing ring can utilize pressure in the target piece, fluid is prevented from leaking out between the rubber coating structure and the framework body, and the sealing performance of the external valve body is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sealed valve bodies, and particularly to an external valve body and a fuel tank. Background Art

[0002] As a core component of a fluid control system, the sealing performance and durability of an external valve body directly affect the safe operation of equipment. To balance structural strength and corrosion resistance, valves in the industry generally adopt a 2K structure (a skeleton made of nylon or POM on the inner layer and an HDPE coating on the outer layer). The 2K structure in the existing process relies on the physical interlocking effect (such as mechanical bite and van der Waals force) of the molten state of the materials to achieve interlayer bonding, lacking a chemical bonding mechanism, resulting in relatively low overall sealing performance of the valve body and easy leakage of fluid between the inner skeleton and the outer coating.

[0003] To solve the above problems, the present invention proposes an external valve body with better sealing performance. Summary of the Invention

[0004] The purpose of the present invention is to provide an external valve body, in which a sealing ring is installed upstream of the gap between the skeleton main body and the coating structure, and the sealing ring is pressed tightly in the installation groove by using the pressure inside the target part, so as to solve the problems existing in the above-mentioned prior art and improve the sealing performance of the external valve body itself.

[0005] To achieve the above purpose, the present invention provides the following solution:

[0006] The present invention provides an external valve body, comprising:

[0007] A skeleton main body, in which a channel for fluid passage is provided inside, and an installation platform is arranged around the outer side wall of the skeleton main body;

[0008] A coating structure, which includes a sealing part and a connecting part connected to each other. The sealing part is wrapped on the outer side surface of the installation platform. Along the axial direction of the installation platform, the connecting part is located on one side of the sealing part. The end of the connecting part far from the sealing part is used to be connected to the target part. An annular installation groove is opened on the side of the installation platform close to the target part. The installation groove extends radially along the installation platform to the outer side surface of the installation platform. The side of the connecting part close to the skeleton main body is spaced from the side wall of the installation groove. The end surface of the installation platform close to the target part is spaced from the target part;

[0009] A sealing ring, which is installed in the installation groove, and the side of the sealing ring far from the axis of the skeleton main body abuts against the connecting part.

[0010] As an embodiment, one end of the sealing ring close to the target member extends towards the target member to the outside of the installation groove, and an opening on the side of the installation groove close to the target member is spaced from the skeleton body.

[0011] As an embodiment, the included angle between the bottom wall and the side wall of the installation groove is between 45° and 75°.

[0012] As an embodiment, the end of the connecting portion close to the target member extends towards the axis direction of the skeleton body, and the end of the extending portion away from the target member abuts against the sealing ring.

[0013] As an embodiment, the rubber-coated structure further includes an auxiliary sealing portion, the auxiliary sealing portion is located on the side of the installation table away from the target member, the auxiliary sealing portion is connected to the sealing portion, and the auxiliary sealing portion wraps around the outer side surface of the skeleton body.

[0014] As an embodiment, a clamping portion is provided on the outer side wall of the end of the skeleton body away from the target member, the clamping portion extends along the diameter of the skeleton body in a direction away from the axis of the skeleton body, and one side of the clamping portion close to the target member abuts against the auxiliary sealing portion.

[0015] As an embodiment, it further includes a reinforcing rib, the reinforcing rib is located on the side of the installation table close to the target member, and the reinforcing rib is installed on the outer side surface of the skeleton body.

[0016] The present invention also provides a fuel tank, which applies the above-mentioned external valve body. One end of the skeleton body close to the connecting portion extends into the oil outlet of the fuel tank, one end of the connecting portion away from the sealing portion is connected to the installation wall of the fuel tank for installing the external valve body, the outer wall of the skeleton body is spaced from the oil outlet, and the end surface of the installation table close to the fuel tank is spaced from the installation wall.

[0017] As an embodiment, the material of the installation wall is the same as that of the sealing portion.

[0018] As an embodiment, the sealing portion is welded to the installation wall.

[0019] The present invention has achieved the following technical effects compared with the prior art:

[0020] In the external valve body disclosed in the present invention, it is hermetically connected to the target part through the connecting part, and the sealing ring in the installation groove abuts against the connecting part to prevent the fluid in the target part from leaking out through the gap between the sealing ring and the connecting part. The end face of the installation table close to the target part is spaced from the target part, and the side of the connecting part close to the skeleton main body is spaced from the side wall of the installation groove, ensuring that the pressure inside the target part can be transmitted to the top of the sealing ring to press the sealing ring tightly in the installation groove and prevent the fluid from leaking out through the gap between the sealing ring and the bottom wall of the installation groove. Furthermore, the fluid in the target part can be prevented from entering between the rubber-coated structure and the skeleton main body through the sealing ring, that is, the external leakage of the fluid between the rubber-coated structure and the skeleton main body is avoided, and the sealing performance of the external valve body is improved. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Structural schematic diagram of the external valve body in the embodiment of the present invention;

[0023] Figure 2 is Figure 1 side sectional view schematic diagram of;

[0024] Figure 3 Structural schematic diagram of the fuel tank in the embodiment of the present invention;

[0025] Wherein, 1. Skeleton main body; 2. Installation table; 3. Sealing part; 4. Connecting part; 5. Installation groove; 6. Sealing ring; 7. Auxiliary sealing part; 8. Clamping part; 9. Reinforcing rib; 10. Installation wall. Detailed Embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide an external valve body that can utilize the pressure inside the target part to solve the problems existing in the prior art and improve the sealing performance of the external valve body.

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Please refer to Figures 1-3 , in the embodiment of the present invention, the external valve body disclosed includes: a skeleton main body 1, a rubber coating structure and a sealing ring 6; wherein, a channel for fluid to pass through is formed inside the skeleton main body 1, and a mounting table 2 is arranged around the outer side wall of the skeleton main body 1; the rubber coating structure includes a sealing part 3 and a connecting part 4 which are connected to each other, the sealing part 3 is wrapped on the outer side surface of the mounting table 2, along the axial direction of the mounting table 2, the connecting part 4 is located on one side of the sealing part 3, and one end of the connecting part 4 away from the sealing part 3 is used for connecting with a target part, and the target part can be an oil tank or a container for storing other media; an annular mounting groove 5 is formed on one side of the mounting table 2 close to the target part, the mounting groove 5 extends radially along the mounting table 2 to the outer side surface of the mounting table 2, and one side of the connecting part 4 close to the skeleton main body 1 is arranged at an interval from the side wall of the mounting groove 5, and the end surface of the mounting table 2 close to the target part is arranged at an interval from the target part; the sealing ring 6 is installed in the mounting groove 5, and one side of the sealing ring 6 away from the axis of the skeleton main body 1 abuts against the connecting part 4; since the connecting part 4 is arranged at an interval from the skeleton main body 1 and the mounting table 2 is arranged at an interval from the target part, it is ensured that the pressure in the target part (such as the oil and gas pressure in the oil tank) can act on the sealing ring 6, so that the sealing ring 6 can closely adhere to the bottom wall of the mounting groove 5 to prevent the fluid from flowing out between the sealing ring 6 and the bottom wall of the mounting groove 5, and the outer side of the sealing ring 6 abuts against the connecting part 4, which can prevent the fluid from flowing out between the sealing ring 6 and the connecting part 4, and further can prevent the fluid in the target part from entering between the rubber coating structure and the skeleton main body 1 through the sealing ring 6, that is, it avoids the fluid from leaking between the rubber coating structure and the skeleton main body 1, and achieves the technical effect of improving the sealing performance of the external valve body.

[0030] It can be understood that the connection between the connecting part 4 and the target part is a sealed connection; the bottom wall of the mounting groove 5 refers to the inner wall at the bottom (far from the target part) of the mounting groove 5, and of course the mounting groove 5 also includes side walls, that is, the inner wall of the mounting groove 5 close to the axis of the skeleton main body 1; at the same time, the fluid mentioned above includes liquid, gas and gas-liquid mixture.

[0031] In this embodiment, the materials of the connecting part 4 and the mounting position are the same, and here the mounting position refers to the position on the target part connected to the connecting part 4.

[0032] In this embodiment, the materials of the connecting part 4 and the mounting position are both HDPE rubber coating.

[0033] Furthermore, the connection between the connecting part 4 and the mounting position is carried out by welding. It can be understood that the welding here refers to the welding method applicable to HDPE rubber coating, including but not limited to hot melt welding, electrofusion welding and hot air welding.

[0034] In this embodiment, one end of the sealing ring 6 close to the target member extends towards the target member to the outside of the mounting groove 5, and the opening on the side of the mounting groove 5 close to the target member is spaced apart from the skeleton main body 1. In this state, the pressure inside the target member can act on one side of the sealing ring 6 extending outside the mounting groove 5 close to the skeleton main body 1, thereby providing a thrust force for the sealing ring 6 in the direction away from the axis of the skeleton main body 1, so that the side of the sealing ring 6 away from the axis of the skeleton main body 1 can fit more closely with the connecting portion 4, further improving the sealing performance of the valve body.

[0035] In this embodiment, along the direction from the target member to the mounting table 2, the width of the mounting groove 5 gradually increases, and the portion of the sealing ring 6 located in the mounting groove 5 matches the shape of the mounting groove 5, improving the stability of the installation of the sealing ring 6.

[0036] In this embodiment, the included angle between the bottom wall and the side wall of the mounting groove 5 is between 45° and 75°.

[0037] In this embodiment, the included angle between the bottom wall and the side wall of the mounting groove 5 is 60°. Correspondingly, the included angle between the surface of the sealing ring 6 close to the side wall and the surface of the sealing ring 6 close to the bottom wall is also 60°.

[0038] Further, along the axis direction of the skeleton main body 1, the cross-section of the sealing ring 6 is trapezoidal, and the portion of the sealing ring 6 located in the mounting groove 5 is smoothly connected to the portion of the sealing ring 6 extending outside the mounting groove 5.

[0039] In this embodiment, the end of the connecting portion 4 close to the target member extends towards the axis direction of the skeleton main body 1, and one end of the extending portion away from the target member abuts against the sealing ring 6. The extending portion can provide a supporting force for the sealing ring 6, making the installation of the sealing ring 6 more stable.

[0040] In this embodiment, the side of the extending portion close to the target member is welded to the target member.

[0041] In this embodiment, the rubber-coated structure further includes an auxiliary sealing portion 7. The auxiliary sealing portion 7 is located on the side of the mounting table 2 away from the target member. The auxiliary sealing portion 7 is connected to the sealing portion 3. The auxiliary sealing portion 7 wraps around the outer side surface of the skeleton main body 1. The setting of the auxiliary sealing portion 7 increases the contact area between the rubber-coated structure and the skeleton main body 1. On the one hand, it improves the connection stability between the rubber-coated structure and the skeleton main body 1. On the other hand, the larger contact area makes it more difficult for the fluid to seep out between the rubber-coated structure and the skeleton main body 1 when the sealing ring 6 fails.

[0042] In this embodiment, a clamping portion 8 is provided on the outer side wall of the end of the skeleton main body 1 away from the target member. The clamping portion 8 extends along the diameter of the skeleton main body 1 in a direction away from the axis of the skeleton main body 1. The side of the clamping portion 8 close to the target member abuts against the auxiliary sealing portion 7, and the clamping portion 8 can make the rubber-coated structure more stably connected to the skeleton main body 1.

[0043] In this embodiment, the external valve body further includes a reinforcing rib 9. The reinforcing rib 9 is located on the side of the mounting table 2 close to the target member. The reinforcing rib 9 is mounted on the outer side surface of the skeleton main body 1, which improves the strength of the skeleton main body 1.

[0044] In this embodiment, the material of the rubber-coated structure is HDPE.

[0045] Further, the sealing ring 6 is made of a deformable flexible material.

[0046] In this embodiment, the sealing ring 6 is in interference fit with the connecting portion 4.

[0047] In the embodiment of the present invention, a fuel tank is also disclosed, which applies the external valve body described in any one of the above embodiments. One end of the skeleton main body 1 close to the connecting portion 4 extends into the oil outlet of the fuel tank. One end of the connecting portion 4 away from the sealing portion 3 is connected to the mounting wall 10 of the fuel tank for mounting the external valve body. The outer wall of the skeleton main body 1 is spaced from the oil outlet. The end face of the mounting table 2 close to the fuel tank is spaced from the mounting wall 10. The connecting portion 4 is hermetically connected to the mounting wall 10, so that the oil and gas in the fuel tank can only be discharged through the channel in the skeleton main body 1. The oil and gas pressure in the fuel tank can act on the sealing ring 6. Under the action of the oil and gas pressure, the sealing ring 6 can closely adhere to the bottom wall of the mounting groove 5. At the same time, the outer side of the sealing ring 6 abuts against the connecting portion 4. The sealing ring 6 can prevent the oil and gas in the fuel tank from entering between the rubber-coated structure and the skeleton main body 1, that is, it avoids the external leakage of oil and gas between the rubber-coated structure and the skeleton main body 1, and reduces the emissions of the fuel tank.

[0048] In this embodiment, the material of the mounting wall 10 is the same as that of the sealing portion 3.

[0049] In this embodiment, the materials of the mounting wall 10 and the sealing portion 3 are both HDPE.

[0050] In this embodiment, the sealing portion 3 is welded to the mounting wall 10, which improves the connection stability between the sealing portion 3 and the mounting wall 10.

[0051] In this embodiment, the specific welding methods used for connecting the sealing portion 3 and the mounting wall 10 include hot melt welding, electrofusion welding, hot air welding, etc.

[0052] In the present invention, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An external valve body, characterized in that, Comprising: A skeleton main body (1), a channel for fluid passage is provided inside the skeleton main body (1), and a mounting table (2) is disposed around the outer sidewall of the skeleton main body (1); A rubber-coated structure, the rubber-coated structure includes a sealing portion (3) and a connecting portion (4) connected to each other. The sealing portion (3) is wrapped around the outer side surface of the mounting table (2). Along the axial direction of the mounting table (2), the connecting portion (4) is located on one side of the sealing portion (3). The end of the connecting portion (4) away from the sealing portion (3) is used to connect to a target member. An annular mounting groove (5) is provided on the side of the mounting table (2) close to the target member. The mounting groove (5) extends radially along the mounting table (2) to the outer side surface of the mounting table (2). The side of the connecting portion (4) close to the skeleton main body (1) is spaced from the sidewall of the mounting groove (5). The end face of the mounting table (2) close to the target member is spaced from the target member; And a sealing ring (6), the sealing ring (6) is installed in the mounting groove (5), and the side of the sealing ring (6) away from the axis of the skeleton main body (1) abuts against the connecting portion (4).

2. The external valve body according to claim 1, characterized in that, One end of the sealing ring (6) close to the target member extends towards the target member to the outside of the mounting groove (5), and the opening on the side of the mounting groove (5) close to the target member is spaced from the skeleton main body (1).

3. The external valve body according to claim 2, characterized in that, The included angle between the bottom wall and the sidewall of the mounting groove (5) is between 45° and 75°.

4. The external valve body according to claim 1, characterized in that The end of the connecting portion (4) close to the target member extends towards the axis direction of the skeleton main body (1), and the end of the extended portion away from the target member abuts against the sealing ring (6).

5. The external valve body according to claim 1, wherein The rubber-coated structure further includes an auxiliary sealing portion (7), the auxiliary sealing portion (7) is located on the side of the mounting table (2) away from the target member, the auxiliary sealing portion (7) is connected to the sealing portion (3), and the auxiliary sealing portion (7) is wrapped around the outer side surface of the skeleton main body (1).

6. The external valve body according to claim 5, characterized in that, A clamping portion (8) is provided on the outer sidewall of the end of the skeleton main body (1) away from the target member. The clamping portion (8) extends in the direction away from the axis of the skeleton main body (1) along the diameter of the skeleton main body (1). The side of the clamping portion (8) close to the target member abuts against the auxiliary sealing portion (7).

7. The external valve body according to claim 1, characterized in that It further includes a reinforcing rib (9), the reinforcing rib (9) is located on the side of the mounting table (2) close to the target member, and the reinforcing rib (9) is installed on the outer side surface of the skeleton main body (1).

8. A fuel tank, applying the external valve body described in any one of claims 1-7, characterized in that, One end of the skeleton main body (1) close to the connecting portion (4) extends into the oil outlet of the fuel tank, and the end of the connecting portion (4) away from the sealing portion (3) is connected to the mounting wall (10) of the fuel tank for installing the external valve body. The outer wall of the skeleton main body (1) is spaced from the oil outlet, and the end face of the mounting table (2) close to the fuel tank is spaced from the mounting wall (10).

9. The fuel tank according to claim 8, characterized in that, The material of the installation wall (10) is the same as that of the sealing part (3).

10. The fuel tank according to claim 9, characterized in that, The sealing part (3) is connected to the installation wall (10) by welding.

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