Marine blowing type liquid level measurement check valve

Abstract

The utility model discloses a marine blowing type liquid level measurement check valve which comprises an upper shell and a lower shell. A mounting thread part A is arranged at the top of the upper shell, and a shell is arranged at the bottom of the upper shell; the lower shell is arranged at the bottom of the outer shell, a cavity is formed in the outer shell, and a liquid level floater is arranged in the cavity; a mounting structure is arranged between the upper shell and the outer shell, and the upper shell is mounted at the top of the outer shell through cooperative use of a connecting part, an external thread A and an internal thread A of the mounting structure; the check valve has the function of preventing liquid from flowing back through pressure-free ventilation, the liquid level floater moves up and down in the shell according to the height of the liquid level, when the liquid level floater reaches the top, the sealing ring above the liquid level floater makes contact with the conical sealing face of the upper shell to achieve the sealing effect, liquid is effectively prevented from flowing back into a machine cabinet, and the service life of the liquid level floater is prolonged. The safety risk is effectively prevented, and the equipment safety is protected.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, specifically a marine air-blowing type liquid level measurement check valve. Background Technology

[0002] As the primary carrier of cargo, efficient and safe operation of ships is of paramount importance. When transporting various liquid cargoes, ships need to accurately grasp the liquid level information in the cargo hold through liquid level sensors, and accurate liquid level information can be used to calculate the ship's draft.

[0003] Existing shipboard air-blowing level measurement systems are prone to inaccurate level measurements due to the complex and harsh operating conditions of ships. During loading and unloading, the increased internal pressure leads to backflow of liquid cargo from the measuring pipes into the equipment cabinet, potentially causing short circuits or even sparks that could ignite the liquid and cause an explosion. Installing a shipboard air-blowing level measurement check valve on the deck effectively prevents backflow during the air-blowing process, thus mitigating safety risks and protecting the equipment.

[0004] Conventional check valves can only ensure the passage of measuring gas under certain pressure. During backflow, they will block both gas and liquid, preventing the gas pressure from returning to the pressure transmitter inside the measuring chamber and thus failing to achieve the purpose of measurement.

[0005] In view of this, we have introduced a marine-grade air-blowing liquid level measurement check valve. Utility Model Content

[0006] The purpose of this invention is to provide a marine air-blowing type liquid level measurement check valve to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a marine air-blowing liquid level measuring check valve, comprising: an upper shell and a lower shell;

[0008] The top of the upper housing is provided with a mounting thread A, and the bottom of the upper housing is provided with an outer shell;

[0009] The lower housing is located at the bottom of the outer shell, and the outer shell has an internal cavity, in which a liquid level float is installed.

[0010] An installation structure is provided between the upper housing and the outer housing. The upper housing is installed on top of the outer housing through the cooperation of the connecting part of the installation structure, the external thread A and the internal thread A.

[0011] Preferably, the mounting structure includes a limiting part for limiting the liquid level float inside the outer shell, the limiting part and the outer shell being integrally formed; the connecting part is connected to the inside of the upper shell and extends to the outside of the upper shell; the external thread A is connected to the surface of the connecting part, the external thread A and the connecting part being integrally formed; the internal thread A is connected to the inner wall of the cavity, the internal thread A and the cavity being integrally formed; and the internal thread A and the external thread A are threadedly connected.

[0012] Preferably, the top of the liquid level float is connected to an installation groove, the installation groove and the liquid level float are integrally formed, and the top of the installation groove is connected to a top cover.

[0013] Preferably, the inner wall of the upper housing is connected to a sealing ring, and the sealing ring is connected inside the mounting groove.

[0014] Preferably, the bottom of the liquid level float is connected to a fixing part.

[0015] Preferably, the bottom of the lower housing is connected to a base, and the side of the lower housing is connected to an external thread B.

[0016] Preferably, the inner bottom wall of the outer shell has a mounting cavity, which is integrally formed with the outer shell. The inner side wall of the mounting cavity is connected with an internal thread B, which is integrally formed with the mounting cavity. The internal thread B and the external thread B are threaded together.

[0017] Preferably, the bottom of the base is connected to a protrusion, and the surface of the protrusion is connected to a mounting threaded part B, and the protrusion and the mounting threaded part B are integrally formed.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This check valve has the function of preventing liquid backflow without pressure. The liquid level float moves up and down inside the housing according to the liquid level. When it reaches the top, the sealing ring above the liquid level float contacts the conical sealing surface of the upper housing to achieve a sealing effect, effectively preventing liquid backflow into the cabinet, effectively preventing safety risks and protecting equipment safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the upper shell, liquid level float, outer shell and lower shell of this utility model when disassembled;

[0022] Figure 3 This is a schematic diagram of the lower shell of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the liquid level float of this utility model;

[0024] Figure 5 This is a top view of the structure of the liquid level float of this utility model.

[0025] In the diagram: 1. Upper shell; 11. Connecting part; 12. External thread A; 13. Mounting thread A; 2. Sealing ring; 3. Liquid level float; 31. Top cover; 32. Mounting groove; 33. Fixing part; 4. Outer shell; 41. Internal thread A; 42. Cavity; 43. Limiting part; 44. Internal thread B; 45. Mounting cavity; 5. Lower shell; 51. Base; 52. External thread B; 53. Protrusion; 54. Mounting thread B. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 This utility model provides a technical solution: a marine air-blowing liquid level measuring check valve, comprising: an upper housing 1, the top of the upper housing 1 is provided with an installation thread A13, the installation thread A13 and the upper housing 1 are integrally formed, and the bottom of the upper housing 1 is provided with an outer shell 4.

[0028] The lower housing 5 is disposed at the bottom of the outer housing 4. The outer housing 4 has a cavity 42 inside, and a liquid level float 3 is disposed inside the cavity 42. The liquid level float 3 can float inside the cavity 42.

[0029] An installation structure is provided between the upper housing 1 and the outer housing 4. The upper housing 1 is installed on the top of the outer housing 4 through the cooperation of the connecting part 11, the external thread A12 and the internal thread A41 of the installation structure.

[0030] The installation structure includes a limiting part 43 inside the outer shell 4 for limiting the liquid level float 3. The limiting part 43 and the outer shell 4 are integrally formed. The connecting part 11 is connected to the inside of the upper shell 1 and extends to the outside of the upper shell 1. The external thread A12 is connected to the surface of the connecting part 11. The external thread A12 and the connecting part 11 are integrally formed. The internal thread A41 is connected to the inner wall of the cavity 42. The internal thread A41 and the cavity 42 are integrally formed. The internal thread A41 and the external thread A12 are threadedly connected.

[0031] The top of the liquid level float 3 is connected to an installation groove 32, which is integrally formed with the liquid level float 3. The top of the installation groove 32 is connected to a top cover 31.

[0032] The inner wall of the upper housing 1 is connected to a sealing ring 2, and the sealing ring 2 is connected inside the mounting groove 32.

[0033] The bottom of the liquid level float 3 is connected to a fixing part 33.

[0034] The bottom of the lower housing 5 is connected to a base 51, and the side of the lower housing 5 is connected to an external thread B52.

[0035] The inner bottom wall of the outer shell 4 has an installation cavity 45, which is integrally formed with the outer shell 4. The inner side wall of the installation cavity 45 is connected with an internal thread B44, which is integrally formed with the installation cavity 45. The internal thread B44 and the external thread B52 are threadedly connected.

[0036] The bottom of the base 51 is connected to a protrusion 53, and the surface of the protrusion 53 is connected to a mounting thread B54. The protrusion 53 and the mounting thread B54 are integrally formed.

[0037] Gas enters the cavity 42 of the outer shell 4 through the connecting part 11 inside the upper shell 1. At this time, the liquid level float 3 is pressed down by the gas pressure, but its bottom fixing part 33 is restricted by the limiting part 43 inside the outer shell 4 and cannot continue to move down, thus remaining stationary. Gas flows down through the gap between the liquid level float 3 and the cavity 42, and enters the liquid level measuring pipeline in the cabin through the external thread B52 of the lower shell 5, gradually blowing out the liquid in the pipeline until the pipeline is full of gas. After the gas source stops supplying gas, the liquid in the cabin flows back due to gravity. The liquid pressure is transmitted to the bottom of the liquid level float 3 through the base 51 and the protrusion 53 of the lower shell 5. At this time, the liquid pressure pushes the liquid level float 3 to move up. However, because the sealing ring 2 on the inner side of the upper shell 1 is tightly fitted with the mounting groove 32 on the top of the liquid level float 3, forming a seal, the liquid cannot flow back into the gas source pipeline. Instead, it enters the pressure transmitter through the pipeline and calculates the current liquid level height by detecting the pressure value.

[0038] When a ship is loaded with liquid cargo, the liquid level in the hold rises, causing the internal pressure to increase. The high-pressure liquid flows back into the check valve from the liquid level measuring pipe at the bottom of the hold, and enters the cavity 42 of the outer shell 4 through the mounting thread B54 and external thread B52 of the lower shell 5. The liquid pressure pushes the liquid level float 3 upward until the top cover 31 of the float causes the sealing ring 2 to fit against the conical sealing surface inside the upper shell 1, forming a flared structure with a smaller top and a larger bottom. At this time, the sealing ring 2 and the sealing surface form a conical seal, preventing the liquid from continuing to flow upward into the upper shell 1 and the gas source pipe, thus preventing the liquid cargo from entering the cabinet and damaging the equipment. As the pressure in the hold continues to rise, the liquid level float 3 remains at the highest position. The limit part 43 restricts the excessive movement of the float, ensuring the reliability of the seal. At the same time, the pressure is evenly transmitted to the outer shell 4 through the base 51 of the lower shell 5, avoiding local overload.

[0039] The upper housing 1 and the outer housing 4 are connected by external thread A12 and internal thread A41, and are connected and installed together with sealing ring 2; the lower housing 5 and the outer housing 4 are connected by external thread B52 and internal thread B44, and are connected and installed together.

[0040] Specifically, in use, the ship uses an air-blowing type liquid level measurement check valve. When the liquid level is measured, gas is blown out from the cabinet and enters the check valve installed on the deck through the pipeline. It enters from the upper housing 1. At this time, the liquid level float 3 does not move. The gas enters the cabin pipeline through the check valve and blows out the liquid in the pipeline. After the cabinet stops blowing air, the liquid pressure flows back through the pipeline in the cabin. The pressure enters from the lower housing 5 of the check valve and enters the pressure transmitter in the cabinet through the check valve to detect and measure the current liquid level.

[0041] When the ship is loading cargo, the liquid level measurement is not working during the blowing operation. Liquid cargo enters the ship's hold, causing the hold pressure to rise. The liquid flows through the blowing-type liquid level measurement pipeline at the bottom of the hold. Due to the increased pressure in the hold, the pressure compresses the liquid cargo, causing the liquid to rise from the pipeline and enter the check valve from the lower housing 5. This lifts the liquid level float 3. When the float 3 reaches its highest point, the sealing ring 2 above the float 3 contacts the conical sealing surface inside the upper housing 1 (i.e., in the connection part 11). The float 3 and the upper housing 1 form a sealing structure, preventing liquid from entering the cabinet from the check valve, thus achieving the check valve effect.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marine air-blowing type liquid level measuring check valve, characterized in that, include: The upper housing (1) has a mounting thread A (13) on its top and an outer shell (4) on its bottom. The lower housing (5) is located at the bottom of the outer shell (4). The outer shell (4) has a cavity (42) inside, and a liquid level float (3) is installed inside the cavity (42). An installation structure is provided between the upper housing (1) and the outer shell (4). The upper housing (1) is installed on the top of the outer shell (4) by the cooperation of the connecting part (11), external thread A (12) and internal thread A (41) of the installation structure.

2. The marine air-blowing type liquid level measuring check valve according to claim 1, characterized in that, The installation structure includes a limiting part (43) for limiting the liquid level float (3) inside the outer shell (4), the connecting part (11) is connected to the inside of the upper shell (1) and extends to the outside of the upper shell (1), the external thread A (12) is connected to the surface of the connecting part (11), the internal thread A (41) is connected to the inner sidewall of the cavity (42), and the internal thread A (41) and the external thread A (12) are threaded together.

3. A marine air-blowing type liquid level measuring check valve according to claim 1, characterized in that, The top of the liquid level float (3) is connected to a mounting groove (32), and the top of the mounting groove (32) is connected to a top cover (31).

4. A marine air-blowing type liquid level measuring check valve according to claim 3, characterized in that, The inner wall of the upper housing (1) is connected to a sealing ring (2), and the sealing ring (2) is connected inside the mounting groove (32).

5. A marine air-blowing type liquid level measuring check valve according to claim 3, characterized in that, The bottom of the liquid level float (3) is connected to a fixing part (33).

6. A marine air-blowing type liquid level measuring check valve according to claim 1, characterized in that, The bottom of the lower housing (5) is connected to a base (51), and the side of the lower housing (5) is connected to an external thread B (52).

7. A marine air-blowing type liquid level measuring check valve according to claim 6, characterized in that, The inner bottom wall of the outer shell (4) is provided with an installation cavity (45), and the inner side wall of the installation cavity (45) is connected with an internal thread B (44), and the internal thread B (44) and the external thread B (52) are threadedly connected.

8. A marine air-blowing type liquid level measuring check valve according to claim 6, characterized in that, The bottom of the base (51) is connected to a protrusion (53), and the surface of the protrusion (53) is connected to an installation threaded part B (54).

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