Top-mounted anti-freezing cold-resistant liquid level measuring device

Abstract

The utility model discloses a top-mounted anti-freezing cold-resistant liquid level measuring device which comprises a liquid level meter and a heat conduction component matched with the liquid level meter, the liquid level meter is arranged on the top of a measured tank body, the bottom of the heat conduction component is provided with a heat absorption section, the middle portion and the upper portion of the heat conduction component are provided with heat release sections, and the heat conduction component is vertically inserted into the measured tank body. According to the utility model, heat at the bottom of the detected tank body is transmitted to the middle upper part through the application of the heat conduction component, so that a condensation hard shell is prevented from being formed near the heat conduction component, a real liquid level is exposed below the liquid level meter, the accuracy of liquid level detection of the liquid level meter is ensured, and the liquid level meter is novel in design, stable and safe in work, good in anti-freezing and cold-resistant performance and suitable for popularization and application.

Description

Technical Field

[0001] The utility model relates to the field of liquid level measuring devices, in particular to a top-mounted antifreeze and cold-resistant liquid level measuring device. Background Art

[0002] In the process of oil field development, it is necessary to set up outdoor containers such as buried storage tanks, waste oil pools and waste liquid pools. Affected by the climate of the area where the oil field is located, some outdoor containers need to be equipped with heating equipment to keep the content materials in suitable properties. However, in the actual production research process, it was found that the existing heating equipment is generally installed at the bottom of the container. Due to the influence of the thermal conductivity of the material in the container, it is easy to produce the phenomenon of hot bottom and cold top. The material with lower temperature in the upper layer forms a hard shell on the liquid surface, resulting in both contact level gauges represented by float level gauges and non-contact level gauges represented by ultrasonic level gauges losing their effectiveness, and then causing the pump group linked to the material level in the container to produce abnormal operation, which will lead to safety incidents such as filling tank overflow or dry grinding of the discharge pump group without material, which will bring great trouble to the subsequent workers for maintenance and processing; in addition, the level gauge on the container is also prone to freezing and shutdown or damage due to long-term exposure to low temperature environment; the breathing tube on the container will inevitably send in low-temperature air from the outside, which will also cause low temperature in the upper part of the inner side of the container. Utility Model Content

[0003] In view of the problems existing in the background technology, the purpose of the utility model is to provide a top-mounted antifreeze and cold-resistant liquid level measuring device, which effectively solves the problems existing in the background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A top-mounted antifreeze and cold-resistant liquid level measuring device comprises a liquid level gauge and a heat-conducting component matched with the liquid level gauge, wherein the liquid level gauge is installed on the top of a tank body to be measured, the heat-conducting component has a heat-absorbing section at the bottom, and heat-releasing sections in the middle and the top, and the heat-conducting component is vertically inserted in the tank body to be measured.

[0006] Furthermore, the heat-conducting component includes an outer tube and an inner tube that are coaxially arranged, a negative pressure cavity is formed between the outer tube and the inner tube, and the bottom of the negative pressure cavity is filled with working fluid.

[0007] Furthermore, a plurality of fins are provided on the outer bottom of the outer tube.

[0008] Furthermore, a liner is coaxially arranged inside the outer tube, the liner fits the inner wall of the outer tube and has a plurality of openings.

[0009] Furthermore, the liquid level meter is one of a radar level meter, an ultrasonic level meter, a guided wave radar level meter, a servo level meter, a static pressure level meter and a radio frequency admittance level meter, and the heat conductive component is arranged on one side below the liquid level meter.

[0010] Furthermore, the liquid level gauge is a magnetostrictive liquid level gauge or a float type liquid level gauge, and the heat conducting component is integrated on the liquid level gauge.

[0011] Furthermore, a float is slidably sleeved on the outside of the outer tube, a magnet is arranged inside the float, and a waveguide wire or a reed switch cooperating with the magnet is arranged in the inner tube; the upper end of the outer tube is detachably connected to the head of the liquid level meter, and the head of the liquid level meter is also connected to the waveguide wire or the reed switch.

[0012] Furthermore, an externally threaded tube is fixedly provided at the upper end of the outer tube, the externally threaded tube extends to the outside of the tank body to be measured and the gauge head of the liquid level meter is screwed onto the externally threaded tube.

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

[0014] In the utility model, the heat from the bottom of the measured tank body is transported to the middle and upper part through the application of the heat-conducting component, thereby heating the upper part of the measured tank body and the liquid level meter and melting the condensed hard shell formed near the heat-conducting component, thereby preventing the liquid level meter from being damaged by freezing and exposing the real liquid surface under the liquid level meter, thereby ensuring the accuracy of the liquid level detected by the liquid level meter. The application is novel in design, stable and safe in operation, and has good antifreeze and cold resistance, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the working state of the first embodiment of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the heat-conducting component in the first embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the working state of the second embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0019] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] Embodiment 1

[0021] like Figure 1 and Figure 2 As shown, the top-mounted antifreeze and cold-resistant liquid level measuring device described in this embodiment includes a liquid level gauge 1 and a heat-conducting component 2 matched with the liquid level gauge 1, the liquid level gauge 1 is installed on the top of the tank body 3 to be measured, specifically, the liquid level gauge 1 is a magnetostrictive liquid level gauge, the heat-conducting component 2 is integrated on the liquid level gauge 1, the heat-conducting component 2 has a heat-absorbing section at the bottom, and heat-releasing sections in the middle and upper parts, and the heat-conducting component 2 is vertically inserted in the tank body 3 to be measured.

[0022] The above-mentioned heat-conducting component 2 includes an outer tube 4 and an inner tube 5 which are coaxially arranged, and a negative pressure cavity 6 is formed between the outer tube 4 and the inner tube 5. Specifically, the outer tube 4 and the inner tube 5 are both made of metal. A metal sheet is coaxially welded at the lower end of the inner tube 5. The metal sheet is welded to the lower end of the outer tube 4 on all sides to block the bottom surface of the negative pressure cavity 6. A metal sheet is also welded at the upper end of the outer tube 4. The metal sheet blocks the top surface of the negative pressure cavity 6. A through hole corresponding to the inner cavity of the inner tube 5 is also provided on the metal sheet to facilitate the assembly of components in the inner tube 5. After the upper and lower sides of the negative pressure cavity 6 are blocked, the negative pressure cavity 6 is evacuated to reduce the boiling point of water in the negative pressure cavity 6. A floating ball 7 is slidably sleeved on the outer side of the outer tube 4, and a magnet is provided in the floating ball 7. 5 is provided with a waveguide wire 8 or a reed switch that cooperates with a magnet. The specific principle of realizing liquid level measurement by cooperating with the magnet in the float 7 and the waveguide wire 8 or the reed switch is the prior art in the art and will not be described in detail here. The liquid level meter 1 is a magnetostrictive liquid level meter, in which a waveguide wire 8 is provided in the inner tube 5. The present embodiment adopts a magnetostrictive liquid level meter, and the liquid level meter 1 is a float type liquid level meter, in which a reed switch is provided in the inner tube 5. The upper end of the outer tube 4 is detachably connected to the meter head of the liquid level meter 1. Specifically, an externally threaded tube 9 is welded on the metal sheet at the upper end of the outer tube 4, and the externally threaded tube 9 extends to the outside of the measured tank body 3 and the meter head of the liquid level meter 1 is screwed on the externally threaded tube 9. The meter head of the liquid level meter 1 is also connected to the waveguide wire 8.

[0023] The bottom of the negative pressure cavity 6 is filled with a working fluid 10, and the working fluid 10 is water. The boiling point of the water in the negative pressure cavity 6 is lowered, and it is easier to evaporate and absorb heat. When the absorbed heat rises to the upper middle part of the heat-conducting component 2, condensation and heat release occur, thereby achieving the purpose of heating the upper middle part of the heat-conducting component 2; a plurality of fins 11 are welded to the outer bottom of the outer tube 4 to increase the heat absorption area of ​​the bottom of the outer tube 4.

[0024] In order to further enhance the heat exchange capacity of the outer tube 4, a liner 12 is coaxially arranged inside the outer tube 4. The liner 12 fits the inner wall of the outer tube 4 and has multiple openings. There is a gap between the inner side of the liner 12 and the inner tube 5. The material of the liner 12 can be a metal honeycomb panel. The application of the liner 12 increases the heat exchange area between the outer tube 4 and water and steam.

[0025] The working principle of the embodiment of the utility model is:

[0026] A feed pipe, a discharge pipe 13, a breathing pipe 14 and a hot water heating pipe 15 are installed on the tested tank body 3. A discharge pump is arranged on the discharge pipe 13, and a breathing valve 16 is arranged on the breathing pipe 14. The hot water heating pipe 15 heats the material at the bottom of the tested tank body 3. At the same time, the bottom of the heat-conducting component 2 absorbs heat. Water absorbs heat and evaporates to form steam and moves upward. Condensation and heat release occur continuously during the upward movement, thereby heating the upper and middle parts of the heat-conducting component 2. The heat-conducting component 2 then releases heat to the surrounding materials and the head of the liquid level meter 1, avoiding the formation of a condensation crust 17 on the liquid surface near the heat-conducting component 2, exposing the real liquid surface under the liquid level meter 1, ensuring the accuracy of the liquid level detection by the liquid level meter 1, and also ensuring that the head of the liquid level meter 1 is at a suitable working temperature in severe cold climates and is not damaged by freezing. The above-mentioned entire cycle process is a physical phenomenon, and no external power supply is required, thereby ensuring the safety of the buried tank and meeting the safety production requirements. It is worth noting that when the waveguide wire 8 is arranged in the inner tube 5, the waveguide wire 8 passing through The pulse current will generate a magnetic field, and the water and steam in the negative pressure cavity 6 are in the magnetic field. When the magnetic field is adjusted to a specific frequency, the water in the steam will cut the magnetic wire, thereby converting large molecules of water into small molecules of water, and the molecular form changes. Due to the small volume of small molecules of water, the attraction between each other is weakened, which is more conducive to floating to the upper part of the negative pressure cavity 6, thereby solving the problem that the heat-conducting component 2 cannot be too long or will be very thick after being long. The diameter of the heat-conducting component 2 is reduced, and the outer side of the outer tube 4 will also be infiltrated with oil, which effectively reduces the friction between the float 7 and the outer tube 4, which is conducive to the smooth lifting of the float 7; in addition, the small molecule of water is highly volatile, which can speed up the steam circulation efficiency in the negative pressure cavity 6, so that the heat is more quickly introduced into the upper area with lower temperature, thereby improving the heating efficiency; the waveguide wire 8 is used to promote the working fluid 10, which effectively guarantees the length and measurement range of the heat-conducting component 2, and has a wider adaptability to the tank bodies 3 of different specifications;

[0027] In addition, the heat-conducting component 2 with a double-layer tube design can better protect the waveguide wire 8. When the outer tube is corroded and damaged, the inner tube can still protect the waveguide wire 8 and prevent the waveguide wire 8 from contacting the material in the tank, thereby avoiding damage to the waveguide wire 8.

[0028] Embodiment 2

[0029] like Figure 3As shown, the difference between this embodiment and the first embodiment is that the liquid level meter 1 and the heat-conducting component 2 are not integrated together, the liquid level meter 1 is one of a radar level meter, an ultrasonic level meter, a guided wave radar level meter, a servo level meter, a static pressure level meter and a radio frequency admittance level meter. This embodiment adopts an ultrasonic level meter, and the heat-conducting component 2 is arranged on the lower side of the liquid level meter 1, avoiding the detection projection area of ​​the liquid level meter 1 but not far away, the outer side of the outer tube 4 of the heat-conducting component 2 is not provided with a float 7, and the inner tube is not provided with a waveguide wire 8 and a reed switch. The heat-conducting component 2 simply realizes the heat transfer process from bottom to top to avoid freezing of the detection projection area of ​​the liquid level meter 1. The other parts of this embodiment are the same as the first embodiment and are not repeated here.

[0030] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. A top-mounted antifreeze and cold-resistant liquid level measuring device, characterized in that: It comprises a liquid level meter and a heat-conducting component matched with the liquid level meter. The liquid level meter is installed on the top of the measured tank body. The heat-conducting component has a heat-absorbing section at the bottom and heat-releasing sections at the middle and upper parts. The heat-conducting component is vertically inserted in the measured tank body.

2. A top-mounted antifreeze and cold-resistant liquid level measuring device according to claim 1, characterized in that: The heat-conducting component comprises an outer tube and an inner tube which are coaxially arranged, a negative pressure cavity is formed between the outer tube and the inner tube, and a working fluid liquid is filled at the bottom of the negative pressure cavity.

3. A top-mounted antifreeze and cold-resistant liquid level measuring device according to claim 2, characterized in that: A plurality of fins are arranged on the outer bottom of the outer tube.

4. A top-mounted antifreeze and cold-resistant liquid level measuring device according to claim 3, characterized in that: A liner is coaxially arranged inside the outer tube, the liner fits the inner wall of the outer tube and has a plurality of openings.

5. A top-mounted antifreeze and cold-resistant liquid level measuring device according to any one of claims 1 to 4, characterized in that: The liquid level meter is one of a radar liquid level meter, an ultrasonic liquid level meter, a guided wave radar liquid level meter, a servo liquid level meter, a static pressure liquid level meter and a radio frequency admittance liquid level meter, and the heat conducting component is arranged on one side below the liquid level meter.

6. A top-mounted antifreeze and cold-resistant liquid level measuring device according to any one of claims 2 to 4, characterized in that: The liquid level gauge is a magnetostrictive liquid level gauge or a float type liquid level gauge, and the heat conducting component is integrated on the liquid level gauge.

7. A top-mounted antifreeze and cold-resistant liquid level measuring device according to claim 6, characterized in that: A float is slidably sleeved on the outside of the outer tube, a magnet is arranged inside the float, and a waveguide wire or a reed switch cooperating with the magnet is arranged in the inner tube; the upper end of the outer tube is detachably connected to the head of the liquid level meter, and the head of the liquid level meter is also connected to the waveguide wire or the reed switch.

8. A top-mounted antifreeze and cold-resistant liquid level measuring device according to claim 7, characterized in that: An external threaded tube is fixedly arranged at the upper end of the outer tube, the external threaded tube extends to the outside of the tank body to be measured and the gauge head of the liquid level meter is screwed on the external threaded tube.

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