Soft oil tank liquid level meter

Abstract

The utility model discloses a soft oil tank liquid level meter which comprises a wiring cavity, an isolation sealing section, a quick connector used for fixing the oil tank liquid level meter, a hollow soft cable and a sensor assembly which are sequentially connected from top to bottom. The wiring cavity is provided with a waterproof vent valve communicated with a cavity body of the wiring cavity and two wire outlet holes, the isolation sealing section is divided into an upper cavity body and a lower cavity body through a built-in partition plate, and the lower end of the isolation sealing section is provided with a plurality of vent caps communicated with the lower cavity body of the isolation sealing section; the sensor of the liquid level meter is input through the vent valve port of the soft oil tank, so that the liquid level and the oil storage temperature of the soft oil tank can be measured; on-site laying and dismounting are facilitated, and a vehicle-mounted power supply of soft oil tank carrying equipment can be used for supplying power. A pressure type liquid level measuring method is adopted, an outlet of a pressure balance hose of a pressure sensor is arranged in a wiring cavity, and the wiring cavity is communicated with the atmosphere through a waterproof vent valve.

Description

Technical Field

[0001] The utility model relates to the field of liquid level gauges for flexible oil tanks, and particularly to a liquid level gauge for flexible oil tanks. Background Art

[0002] At present, the commonly used flexible oil tank for oil storage is a 50-cubic rubber flexible oil tank. When in use, usually 8 are in a group. It is very difficult to realize the real-time measurement of the liquid level height of the flexible oil tank, and thus it is impossible to obtain the oil storage volume of the flexible oil tank. At present, there are two methods for measuring the liquid level of flexible oil tanks. One is to directly measure the height of the flexible oil tank after filling with oil by using a ruler or other measuring tools. The other is to lay pressure sensors on the foundation of the flexible oil tank. The former cannot realize real-time measurement; the latter is affected by the material of the flexible oil tank and the flatness of the tank foundation, etc., and the measurement accuracy is low. Content of the Utility Model

[0003] Aiming at the above existing technical deficiencies, the purpose of the utility model is to provide a liquid level gauge for a flexible oil tank, which measures the liquid level by putting a pressure sensor at the bottom of the tank and measuring the hydrostatic pressure at the bottom of the tank. Structurally, the liquid level gauge is integrated into the breather valve of the flexible oil tank, and the liquid level is measured by using a pressure type liquid level gauge and integrating a temperature sensor. The oil storage volume of the flexible oil tank is calculated through a host computer.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model provides a liquid level gauge for a flexible oil tank, which comprises a wiring cavity, an isolation and sealing section, a quick joint for fixing the oil tank liquid level gauge, a hollow flexible cable and a sensor assembly connected in sequence from top to bottom; a waterproof air vent valve communicating with its cavity and two wire outlet holes are arranged on the wiring cavity, the isolation and sealing section is divided into an upper cavity and a lower cavity by an internal partition board, and a plurality of air vent caps communicating with its lower cavity are arranged at the lower end of the isolation and sealing section;

[0006] The sensor assembly comprises a pressure sensor and a temperature sensor. The cable of the pressure sensor, the pressure balance conduit and the cable of the temperature sensor sequentially pass through the hollow flexible cable and the isolation and sealing section and then enter the wiring cavity, and the cables are led out from the two wire outlet holes. The pressure balance conduit of the pressure sensor is connected to the waterproof air vent valve and then communicated with the atmosphere to balance the reference pressure of the pressure sensor; through holes for the cables and the pressure balance conduit to pass through are formed on the partition board and are subjected to sealing treatment.

[0007] Preferably, the connection relationship between the isolation and sealing section and the wiring cavity and the quick joint is a threaded connection.

[0008] Preferably, an explosion-proof gland is arranged on the through hole formed on the partition board for sealing the cables and the pressure balance conduit.

[0009] Preferably, a wiring board for fixing cables is provided in the wiring cavity.

[0010] Preferably, there are two vent caps, which are symmetrically arranged at 180° on both sides of the isolation and sealing section.

[0011] The beneficial effects of the present utility model are as follows: The sensor of this liquid level gauge is inserted through the vent valve opening of the flexible oil tank, and it can measure the liquid level and storage oil temperature of the flexible oil tank; it is convenient for on-site laying and disassembly, and can be powered by the vehicle-mounted power supply of the flexible oil tank transportation equipment; the pressure type liquid level measurement method is adopted, the outlet of the pressure balance hose of the pressure sensor is placed in the wiring cavity, and the wiring cavity is connected to the atmosphere through a waterproof vent valve. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a structural schematic diagram of a flexible oil tank liquid level gauge provided by an embodiment of the present utility model.

[0014] Explanation of the reference numerals in the drawings:

[0015] 1 - Wiring cavity, 2 - Wiring board, 3 - Waterproof vent valve, 4 - Isolation and sealing section, 5 - Explosion-proof gland, 6 - Partition board, 7 - Vent cap, 8 - Quick connector, 9 - Flexible cable, 10 - Sensor assembly. Detailed Embodiments

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.

[0017] As Figure 1 shown, a flexible oil tank liquid level gauge includes a wiring cavity 1, an isolation and sealing section 4, a quick connector 8 for fixing the oil tank liquid level gauge, a hollow flexible cable 9, and a sensor assembly 10 that are connected in sequence from top to bottom; the wiring cavity 1 is provided with a waterproof vent valve 3 communicating with its cavity and two wire outlet holes, the isolation and sealing section 4 is divided into an upper cavity and a lower cavity by an internal partition board 6, and the lower end of the isolation and sealing section 4 is provided with several vent caps 7 communicating with its lower cavity;

[0018] The sensor assembly 10 includes a pressure sensor and a temperature sensor. The cable of the pressure sensor, the pressure balance conduit, and the cable of the temperature sensor sequentially pass through the hollow flexible cable 9 and the isolation and sealing section 4 and then enter the wiring cavity 1. The cables are led out from two outlet holes. The pressure balance conduit of the pressure sensor is connected to the waterproof breather valve 3 and then communicated with the atmosphere to balance the reference pressure of the pressure sensor; through holes for the cables and the pressure balance conduit to pass through are formed in the partition plate 6 and are subjected to sealing treatment.

[0019] The connection relationship between the isolation and sealing section 4 and the wiring cavity 1 and the quick connector 8 is a threaded connection.

[0020] An explosion-proof gland 5 is provided on the through hole formed in the partition plate 6 for sealing the cables and the pressure balance conduit.

[0021] A wiring board 2 for fixing the cables is provided in the wiring cavity 1.

[0022] Two vent caps 7 are provided and are symmetrically arranged at 180° on both sides of the isolation and sealing section 4.

[0023] In use, 8 liquid level gauges of this device are used as a group and connected to the host computer; the host computer is connected to this liquid level gauge by using a 4-core shielded rubber-sheathed cable through a power supply safety barrier and an RS485 safety barrier; the pressure sensor and the temperature sensor can measure the oil pressure and temperature, and the host computer uses the relationship between the oil density and the temperature to convert it into the accurate oil level height. The length of the flexible cable is selected to be 35 mm longer than the maximum height after the flexible oil tank is filled with oil to ensure that the liquid level gauge is in the correct measurement position at the maximum liquid level height. To ensure that the pressure sensor can enter the interface of the breather valve of the flexible oil tank, its outer diameter should not be greater than 19 mm. The protective layer of the flexible cable needs to be made of oil-resistant material.

[0024] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. A flexible oil tank liquid level gauge, characterized in that: It includes a wiring cavity (1), an isolation and sealing section (4), a quick connector (8), a hollow flexible cable (9), and a sensor assembly (10) connected in sequence from top to bottom; a waterproof vent valve (3) communicating with its cavity and two wire outlet holes are provided on the wiring cavity (1), the isolation and sealing section (4) is divided into an upper cavity and a lower cavity by an internal partition board (6), and a plurality of vent caps (7) communicating with its lower cavity are provided at the lower end of the isolation and sealing section (4); The sensor assembly (10) includes a pressure sensor and a temperature sensor. The cables of the pressure sensor, the pressure balance conduit, and the cable of the temperature sensor sequentially pass through the hollow flexible cable (9) and the isolation and sealing section (4) and then enter the wiring cavity (1). The cables are led out from the two wire outlet holes, and the pressure balance conduit of the pressure sensor is connected to the waterproof vent valve (3) and then communicated with the atmosphere; through holes for the cables and the pressure balance conduit to pass through are opened on the partition board (6) and are subjected to sealing treatment.

2. The liquid level gauge of a flexible oil tank according to claim 1, characterized in that: The connection relationship between the isolation and sealing section (4) and the wiring cavity (1) and the quick connector (8) is a threaded connection.

3. The liquid level gauge of a flexible oil tank according to claim 1, wherein: An explosion-proof gland (5) is provided on the through hole opened on the partition board (6).

4. The liquid level gauge of a flexible oil tank according to claim 1, wherein: A wiring board (2) is provided in the wiring cavity (1).

5. The liquid level gauge of a flexible oil tank according to claim 1, characterized in that: There are two vent caps (7), which are symmetrically arranged at 180° on both sides of the isolation and sealing section (4).

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