Suction inlet with non-return function

Abstract

The invention relates to a suction inlet with a non-return function, and relates to the field of structural design of a suction pipeline in an oil-water cabin, the suction inlet comprises a valve body, a flow channel is formed in the valve body, a valve disc is slidably connected to the interior of the flow channel, the flow channel comprises a small-diameter part located at the inlet end and a diameter-expanding part located at the outlet end, and the diameter-expanding part is connected with the valve disc in a sliding mode. The valve disc slides in the expanding part, the diameter of the expanding part is larger than that of the small-diameter part, the expanding part and the small-diameter part form a sealing step, the diameter of the valve disc is larger than that of the small-diameter part, and a flow channel is formed in the position, opposite to the sealing step, of the valve disc. The problem that when the pump is far away from the suction port, the pump vacuumizes or media flow back after the pump stops is solved.

Description

Technical Field

[0001] The present application relates to the field of suction pipe structure design in an oil-water tank, and in particular to a suction port with a non-return function. Background Art

[0002] On ships, due to comprehensive layout considerations, some pumps may be located far away from their suction ports. This design may result in a certain amount of time before the air in the suction pipe is pumped out after the pump is started, so that the medium can be pumped. This design layout consideration may be due to space limitations or other technical factors on the ship.

[0003] In actual operation, it is common for the pump to take some time to exhaust after starting, especially for pumps far away from the suction port. This situation may affect the efficiency and response speed of the pump, especially when it is necessary to start and pump the medium quickly.

[0004] Likewise, when the pump stops, a large amount of medium in the suction pipe flows back into the cabin, causing the medium in the cabin to be unable to be drained. Summary of the invention

[0005] In order to solve the problem of the pump drawing a vacuum when the pump is far away from the suction port or to prevent the medium from flowing back after the pump is stopped, the present application provides a suction port with a check function.

[0006] The present application provides a suction port with a non-return function, which adopts the following technical solution:

[0007] A suction port with a check function comprises a valve body, a flow channel is provided inside the valve body, a valve disc is slidably connected inside the flow channel, the flow channel comprises a small diameter portion located at the inlet end and an expanded diameter portion located at the outlet end, the valve disc slides in the expanded diameter portion, the diameter of the expanded diameter portion is larger than the diameter of the small diameter portion, the expanded diameter portion and the small diameter portion form a sealing step, the diameter of the valve disc is larger than the diameter of the small diameter portion, and the valve disc is provided with a flow channel relative to the sealing step.

[0008] Optionally, the diameter of the valve disc is smaller than the diameter of the expanded diameter portion, and the inner wall of the valve body relative to the expanded diameter portion and the outer wall of the valve disc form a flow channel, and when the bottom wall of the valve disc is separated from the sealing step, the small diameter portion is connected to the expanded diameter portion through the connecting channel.

[0009] Optionally, the outer wall of the valve disc abuts against the side wall of the expanded diameter portion, and the flow channel is opened at a position where the valve disc is opposite to the sealing step. The flow channel penetrates the valve disc, and when the bottom wall of the valve disc is separated from the sealing step, the small diameter portion is connected to the expanded diameter portion through the connecting channel.

[0010] Optionally, the valve body includes an upper valve component and a lower valve component, the upper valve component and the lower valve component are fixedly connected, the expanded diameter portion is located in the upper valve component, the small diameter portion is located in the lower valve component, and a sealing component is provided between the upper valve component and the lower valve component.

[0011] Optionally, the upper valve member is fixedly connected to a connecting portion at the top end of the expanded diameter portion, and the inner diameter of the connecting portion is smaller than the inner diameter of the valve disc.

[0012] Optionally, the lower valve member is fixedly connected to a suction port at the bottom end of the small-diameter portion, and the interior of the suction port is communicated with the interior of the small-diameter portion.

[0013] Optionally, the expanded diameter portion and the inner side wall of the connecting portion are smoothly transitioned.

[0014] Optionally, the inner diameter of the suction port gradually decreases from an end away from the small-diameter portion to an end close to the small-diameter portion, and an opening at one end of the suction port close to the small-diameter portion is the same as an opening of the small-diameter portion.

[0015] Optionally, a guide rod is fixedly connected to the top end of the valve disc, a guide ring is fixedly connected to the inside of the valve body at a position relative to the guide rod, and the guide rod is located inside the guide ring and slides relatively.

[0016] Optionally, the thickness of the valve disc close to the center of the guide rod is greater than the thickness at the edge.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] When the pump is started, the valve disc rises, and the medium enters the small diameter part and the expanded diameter part through the trumpet-shaped suction port, and then the medium is transported to the required position through the pump. When the pump stops, the valve disc drops due to gravity, and the valve disc blocks the flow channel of the small diameter part, thereby preventing the medium in the suction pipe from flowing back into the cabin. It mainly solves the problem of pumping vacuum when the pump is far away from the suction port or preventing the medium from flowing back after stopping the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a suction port with a non-return function in an embodiment of the present application.

[0020] Figure 2 It is a structural schematic diagram of the valve disc position of a suction port with a check function in an embodiment of the present application.

[0021] Explanation of the reference numerals: 1. valve body; 11. flow channel; 12. sealing step; 13. guide ring; 131. support plate; 2. upper valve member; 21. expanded diameter portion; 22. connecting portion; 3. lower valve member; 31. small diameter portion; 32. suction port; 4. sealing rubber ring; 5. valve disc; 51. blocking portion; 52. sealing portion; 53. guide rod. DETAILED DESCRIPTION

[0022] On ships, due to comprehensive layout considerations, some pumps may be located far away from their suction ports. This design may result in a certain amount of time before the air in the suction pipe is pumped out after the pump is started, so that the medium can be pumped. This design layout consideration may be due to space limitations or other technical factors on the ship.

[0023] In actual operation, it is common for the pump to take some time to exhaust after starting, especially for pumps far away from the suction port. This situation may affect the efficiency and response speed of the pump, especially when it is necessary to start and pump the medium quickly.

[0024] Likewise, when the pump stops, a large amount of medium in the suction pipe flows back into the cabin, causing the medium in the cabin to be unable to be drained.

[0025] In order to solve the problem of the pump drawing a vacuum when the pump is far away from the suction port or to prevent the medium from flowing back after the pump is stopped, the present application provides a suction port with a check function.

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] The following is combined with Figure 1-2 This application is described in further detail.

[0029] The present application embodiment discloses a suction port with a non-return function. Figure 1 , Figure 2 A suction port with a check function includes a valve body 1, the valve body 1 includes an upper valve member 2 at the top and a lower valve member 3 at the bottom, a sealing rubber ring 4 is arranged between the upper valve member 2 and the lower valve member 3, the upper valve member 2 and the lower valve member 3 are relatively fixed by bolts, and are sealed by the sealing rubber ring 4 between the upper valve member 2 and the lower valve member 3.

[0030] A flow channel 11 is provided inside the valve body 1 , and the flow channel 11 includes an enlarged diameter portion 21 disposed inside the upper valve member 2 and a small diameter portion 31 disposed inside the lower valve member 3 , and the bottom end of the enlarged diameter portion 21 is relatively connected to the top end of the small diameter portion 31 .

[0031] The diameter of the enlarged diameter portion 21 is larger than that of the small diameter portion 31, so that the top wall of the small diameter portion 31 and the inside of the enlarged diameter portion 21 form a boss-shaped sealing step 12. A valve disc 5 is horizontally arranged inside the enlarged diameter portion 21. The valve disc 5 is a circular structure, and the valve disc 5 is located inside the enlarged diameter portion 21 and is relatively slidably connected along the height direction.

[0032] In some embodiments, the diameter of the valve disc 5 is larger than the diameter of the small diameter portion 31, and the diameter of the valve disc 5 is smaller than the diameter of the expanded diameter portion 21, the valve disc 5 is coaxially arranged with the small diameter portion 31, the valve disc 5 is coaxially arranged with the expanded diameter portion 21, and the side wall of the valve disc 5 is provided with a blocking portion 51 opposite to the inner side wall of the small diameter portion 31 and a sealing portion 52 in an annular shape located outside the blocking portion 51, the blocking portion 51 and the sealing portion 52 are fixedly connected, the diameter of the blocking portion 51 is the same as the diameter of the small diameter portion 31, the sealing portion 52 is relatively abutted against the top wall of the lower valve component 3, and the blocking portion 51 is opposite to the inside of the small diameter portion 31.

[0033] When the pump is started, the pressure inside the expanded diameter portion 21 decreases, driving the valve disc 5 to move upward, so that the bottom end of the valve disc 5 is separated from the top wall of the small diameter portion 31, and then the side wall of the valve disc 5 and the inner wall of the expanded diameter portion 21 form an annular flow channel. The medium inside the small diameter portion 31 moves upward under the drive of pressure and enters the interior of the expanded diameter portion 21 through the annular flow channel.

[0034] In some other embodiments, the diameter of the valve disc 5 may be the same as the inner diameter of the enlarged diameter portion 21, and the side wall of the valve disc 5 slides against the inner side wall of the enlarged diameter portion 21, and the valve disc 5 includes a blocking portion 51 opposite to the small diameter portion 31 and an annular sealing portion 52 located outside the blocking portion 51, and the diameter of the blocking portion 51 is the same as the diameter of the small diameter portion 31. A small hole is vertically opened on the bottom wall of the sealing portion 52, and the side wall of the small hole sealing portion 52 is completely penetrated, and a flow channel for the flow of the medium is formed through the opened small hole.

[0035] When the pump is started, the pressure inside the expanded diameter portion 21 decreases, driving the valve disc 5 to move upward, so that the bottom end of the valve disc 5 is separated from the top wall of the small diameter portion 31, and then the small holes on the valve disc 5 form a flow channel. The medium inside the small diameter portion 31 moves upward under the drive of the pressure, first enters the space below the valve disc 5 in the expanded diameter portion 21, and then enters the interior of the expanded diameter portion 21 through the small hole-shaped flow channel.

[0036] A guide rod 53 is fixedly connected to the top of the valve disc 5. The guide rod 53 is coaxially arranged with the valve disc 5. A guide ring 13 is fixedly connected to the inside of the valve body 1 at a position relative to the guide rod 53. The guide ring 13 is coaxially arranged with the guide rod 53 and is an annular structure. A support plate 131 is fixedly connected to the outer wall of the guide ring 13. One end of the support plate 131 is fixedly connected to the guide ring 13, and the other end of the support plate 131 is fixedly connected to the inner wall of the valve body 1. The guide ring 13 is supported and fixed by the support plate 131.

[0037] The guide rod 53 is located inside the guide ring 13, and the outer wall of the guide rod 53 is in abutment with the inner wall of the guide ring 13 for relative sliding connection. Through the guidance of the guide ring 13, the guide rod 53 can move along the axial direction of the guide ring 13, thereby limiting the height movement of the valve disc 5.

[0038] The thickness of the valve disc 5 gradually decreases from one end close to the center of the guide rod 53 to the end away from the center of the guide rod 53 , so that the thickness of the valve disc 5 close to the center is greater than the thickness at the edge.

[0039] The lower valve member 3 is fixedly connected with a suction port 32 at the bottom end of the small diameter portion 31 . The inner diameter of the suction port 32 gradually decreases along the height direction from bottom to top, and the top opening diameter of the suction port 32 is the same as the bottom opening diameter of the small diameter portion 31 .

[0040] The upper valve member 2 is fixedly connected with a connecting portion 22 at the top end of the expanded diameter portion 21. The diameter of the connecting portion 22 is smaller than the diameter of the expanded diameter portion 21, and the diameter of the connecting portion 22 is smaller than the outer diameter of the valve disc 5. The expanded diameter portion 21 and the connecting portion 22 are smoothly transitioned at the relative abutment position.

[0041] When the pump is started, the valve disc 5 rises, and the medium enters the interior of the small-diameter portion 31 and the enlarged-diameter portion 21 through the trumpet-shaped suction port 32, and then the medium is transported to the required position through the pump.

[0042] When the pump stops, the valve disc 5 drops due to gravity, and the valve disc 5 blocks the flow channel 11 of the small diameter portion 31, thereby preventing the medium in the suction pipe from flowing back into the cabin.

[0043] Before starting the pump for the first time, fill the suction pipe in front of the pump with medium to avoid prolonged vacuuming.

[0044] In this application, the term "plurality" means at least two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A suction port with a non-return function at the expanded diameter portion, characterized in that: The invention comprises a valve body (1), wherein a flow channel (11) is provided inside the valve body (1), and a valve disc (5) is slidably connected inside the flow channel (11), wherein the flow channel (11) comprises a small diameter portion (31) located at an inlet end and an expanded diameter portion (21) located at an outlet end, wherein the valve disc (5) slides inside the expanded diameter portion (21), wherein the diameter of the expanded diameter portion (21) is larger than the diameter of the small diameter portion (31), wherein the expanded diameter portion (21) and the small diameter portion (31) form a sealing step (12), wherein the diameter of the valve disc (5) is larger than the diameter of the small diameter portion (31), and wherein a flow channel is provided on the valve disc (5) relative to the sealing step (12).

2. The suction port with a non-return function at the expanded diameter portion according to claim 1, characterized in that: The diameter of the valve disc (5) is smaller than the diameter of the expanded diameter portion (21), and the inner wall of the valve body (1) relative to the expanded diameter portion (21) and the outer wall of the valve disc (5) form a flow channel. When the bottom wall of the valve disc (5) is separated from the sealing step (12), the small diameter portion (31) is connected to the expanded diameter portion (21) through the flow channel.

3. The suction port with a non-return function at the expanded diameter portion according to claim 2, characterized in that: The outer wall of the valve disc (5) abuts against the side wall of the expanded diameter portion (21), and the flow channel is opened at a position where the valve disc (5) is opposite to the sealing step (12). The flow channel penetrates the valve disc (5), and when the bottom wall of the valve disc (5) is separated from the sealing step (12), the small diameter portion (31) is connected to the expanded diameter portion (21) through the flow channel.

4. The suction port with a non-return function at the expanded diameter portion according to claim 1, characterized in that: The valve body (1) comprises an upper valve component (2) and a lower valve component (3), wherein the upper valve component (2) and the lower valve component (3) are fixedly connected, the expanded diameter portion (21) is located in the upper valve component (2), the small diameter portion (31) is located in the lower valve component (3), and a sealing component is provided between the upper valve component (2) and the lower valve component (3).

5. The suction port with a non-return function at the expanded diameter portion according to claim 4, characterized in that: The upper valve member (2) is fixedly connected to a connecting portion (22) at the top end of the diameter-enlarging portion (21); the inner diameter of the connecting portion (22) is smaller than the inner diameter of the valve disc (5).

6. The suction port with a non-return function at the expanded diameter portion according to claim 4, characterized in that: The lower valve member (3) is fixedly connected to a suction port (32) at the bottom end of the small-diameter portion (31), and the interior of the suction port (32) is communicated with the interior of the small-diameter portion (31).

7. The suction port with a non-return function at the expanded diameter portion according to claim 5, characterized in that: The expanded diameter portion (21) and the inner side wall of the connecting portion (22) are smoothly transitioned.

8. The suction port with a non-return function at the expanded diameter portion according to claim 6, characterized in that: The inner diameter of the suction port (32) gradually decreases from an end away from the small-diameter portion (31) to an end close to the small-diameter portion (31), and the opening of the end of the suction port (32) close to the small-diameter portion (31) is the same as the opening of the small-diameter portion (31).

9. The suction port with a non-return function at the expanded diameter portion according to claim 1, characterized in that: A guide rod (53) is fixedly connected to the top end of the valve disc (5), a guide ring (13) is fixedly connected to the inside of the valve body (1) at a position relative to the guide rod (53), and the guide rod (53) is located inside the guide ring (13) and slides relatively therewith.

10. The suction port with a non-return function at the expanded diameter portion according to claim 9, characterized in that: The thickness of the valve disc (5) near the center of the guide rod (53) is greater than the thickness at the edge.

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