Cold insulation compartment for low-temperature liquid pipeline flowmeter

Abstract

The utility model relates to a flowmeter cold insulation isolation box, in particular to a flowmeter cold insulation isolation box for a low-temperature liquid pipeline, which comprises a pipe body arranged in a box body in a penetrating manner, and a vortex shedding flowmeter is communicated with the pipe body in series; the box body is filled with pearlife, and a diamond capillary tube at the output end of the vortex shedding flowmeter is led out of a sealing gland fixedly installed on the box body. The end, located on the outer side of the box body, of the pipe body is sleeved with a heat preservation composite coiled material, and the end, located on the inner side of the box body, of the pipe body is wound with glass silk cotton cloth with the preset length. The low-temperature liquid pipeline flow meter solves the problem that after the low-temperature liquid pipeline flow meter is installed, cold insulation construction such as foam glass bricks, asphalt mastic and polyurethane foaming needs to be conducted on the flow meter, so that later operation and maintenance are inconvenient.

Description

Technical Field

[0001] The utility model relates to a cold-insulating partition box for a flow meter, in particular to a cold-insulating partition box for a low-temperature liquid pipeline flow meter. Background Art

[0002] Cryogenic liquid vortex flowmeters are typically installed in pipelines by welding. The flowmeter's built-in metal capillary and extension cable convert and transmit flow signals to monitor pipeline flow. Their primary function is to monitor flow in cryogenic pipelines in real time, accurately measuring cryogenic liquid flow and feeding this data back to the process control system. This allows for timely monitoring of abnormalities during cryogenic pipeline operation and prompt action to address them, ensuring safe operation.

[0003] Existing cold insulation methods for low-temperature liquid vortex flowmeters typically involve injecting polyurethane foam into a pre-formed "valve box." The valve box model installation process is as follows: Wrap the valve body with a 25mm-thick fiberglass blanket lined with aluminum foil, then secure with reinforcing tape. The aluminum foil acts as a moisture barrier. A valve box is then fashioned from foamed glass bricks based on the shape of the vortex flowmeter. A mixture of polyurethane and polyurethane (AB) is poured into the valve box, and after foaming, it is sealed with foamed glass sheet material. Finally, a moisture barrier and outer protective valve box are installed.

[0004] Flowmeters manufactured using this existing technology are complex to install in cold-insulation. Seams are prone to cooling, which can cause the liquid in the cryogenic pipes to vaporize upon heating, impacting production and leading to dangerous hydrocarbon accumulation (in liquid oxygen). Improper insulation during installation can easily break the metal capillary tubes in the vortex flowmeter. Crucially, later maintenance and repairs require the complete removal of the cold-insulation layer, which can also potentially break the tubes, causing unnecessary damage. After maintenance and repairs are complete, the cold-insulation process must be repeated, consuming significant time and effort. Utility Model Content

[0005] The purpose of the utility model is to provide a cold insulation compartment for a cryogenic liquid pipeline flow meter, so as to solve the above-mentioned problem.

[0006] In order to achieve the above-mentioned object, the utility model provides the following technical solutions: a cold insulation box for a cryogenic liquid pipeline flowmeter, comprising a tube body passing through the box body, the tube body being serially connected to a vortex flowmeter;

[0007] The box is filled with pearl sand, and the diamond capillary at the output end of the vortex flowmeter is led out by a sealing gland fixedly installed on the box;

[0008] The end of the tube body located outside the box body is covered with a thermal insulation composite coil, and the end of the tube body located inside the box body is wound with glass wool cloth of a predetermined length.

[0009] Preferably, the vortex flowmeter is located in the center of the box.

[0010] Preferably, the port on the top of the box body is provided with a cover, and the cover is secured by a strapping belt provided on the bottom of the box body.

[0011] Preferably, a sleeve is fixedly provided on the box body, and the end of the sleeve located inside the box body is an inner pipe, and the end located outside the box body is an outer pipe;

[0012] The tube body passes through the sleeve and is centrally located in the sleeve, with an annular slit formed between the two.

[0013] One half of the axial length of the glass wool cloth is wrapped around the inner tube, and the other half is wrapped around the tube body.

[0014] Preferably, the thermal insulation composite coil includes a moisture-proof coil surrounding the pipe body and a PVC pipe fitting sleeved on the outside of the moisture-proof coil and embedded in the annular slit.

[0015] Preferably, the thermal insulation composite coil comprises a cold-insulating aluminum silicate tube shell, one end of the cold-insulating aluminum silicate tube shell is fixed to the outer pipe fitting through an American hose clamp, and the other end is fixed to the pipe body through an American hose clamp;

[0016] A cavity is formed between the cold-insulating aluminum silicate tube shell and the PVC pipe fitting, and a polyurethane foam block is arranged in the cavity.

[0017] Preferably, the moisture-proof membrane is specifically an SBS waterproof membrane.

[0018] Preferably, one side of the box body is fixedly connected to a sand discharge hole arranged at the bottom of the box body.

[0019] Preferably, one side of the box body is fixedly connected to a sealed air pipeline arranged at the bottom of the box body, and a manual valve is connected in series to the sealed air pipeline.

[0020] In the above technical solution, the utility model provides a cold insulation partition box for low-temperature liquid pipeline flowmeters, which has the following beneficial effects: simple structure, convenient and quick overall construction, and during later maintenance and inspection, it is only necessary to open the sand discharge hole and empty the pearlescent sand in the box to maintain and inspect the vortex flowmeter. After the inspection is completed, the discharged pearlescent sand can be re-loaded into the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 This is a structural diagram provided for an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] 1. Box body; 11. Sealing gland; 12. Sealing cover; 13. Strapping tape; 14. Sand removal hole; 15. Sealing air pipeline; 2. Pipe body; 3. Vortex flowmeter; 4. Pearlescent sand; 5. Thermal insulation composite membrane; 51. Moisture-proof membrane; 52. PVC pipe fittings; 53. Cold-insulating aluminum silicate pipe shell; 54. Polyurethane foam block; 6. Glass wool cloth; 71. Inner pipe fittings; 72. Outer pipe fittings. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, a cold insulation compartment for a cryogenic liquid pipeline flow meter comprises:

[0027] Component 1: Box 1, the top port of which is provided with a cover 12. When the cover 12 is arranged at the port of the box 1, the strapping tape 13 fixed by screws at the bottom of the box 1 is reversely wrapped around to fix the cover 12.

[0028] Secondly, a sleeve is fixedly provided on the box body 1 , and the end of the sleeve located inside the box body 1 is an inner pipe 71 , while the end located outside is an outer pipe 72 .

[0029] Furthermore, one side of the box body 1 is fixedly connected with a sand discharge hole 14 arranged at the bottom of the box body 1. It is used to empty the pearl sand 4 filled in the later embodiment.

[0030] One side of the box body 1 is fixedly connected to a sealed air pipeline 15 arranged at the bottom of the box body 1 , and the sealed air pipeline 15 is connected in series with a manual valve for discharging gas when the pearl sand 4 is filled.

[0031] Component 2: The tube body 2 is connected in series with a vortex flowmeter 3. A moisture-proof coil 51 of predetermined length is wrapped around both ends of the tube body 2 and at a predetermined distance from the vortex flowmeter 3. The coil 51 then passes through the sleeve and is arranged in the center of the sleeve, with an annular slit formed between the two. Finally, the PVC pipe fitting 52 is inserted from the portion of the tube body 2 located outside the box body 1, and finally inserted into the outer pipe fitting 72, thereby fixing the tube body 2. Then, it is surrounded with glass wool cloth 6, so that half of the axial length of the glass wool cloth 6 is wrapped around the inner pipe fitting 71, and the other half is wrapped around the tube body 2. When the interior is completed, the pearlescent sand 4 can be completely filled into the box body 1.

[0032] Furthermore, one end of the cold-insulating aluminum silicate tube shell 53 is fixed to the outer pipe fitting 72 through an American hose clamp, and the other end is fixed to the pipe body 2 through an American hose clamp. Then, a cavity is formed between the cold-insulating aluminum silicate tube shell 53 and the PVC pipe fitting 52, and a predetermined volume of polyurethane foam block 54 is poured into the interior.

[0033] The thermal insulation composite coiled material 5 in the above embodiment includes a moisture-proof coiled material 51 (SBS waterproof coiled material), a PVC pipe fitting 52 and a cold-insulating aluminum silicate pipe shell 53 .

[0034] It should be noted that, in the above embodiment, before the pearl sand 4 is filled, the diamond capillary at the output end of the vortex flowmeter 3 is led out from the sealing gland 11 fixedly installed on the box body 1 .

[0035] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cold insulation compartment for cryogenic liquid pipeline flowmeter, characterized in that: It comprises a tube body (2) passing through a box body (1), wherein a vortex flowmeter (3) is connected in series to the tube body (2); The box (1) is filled with pearl sand (4), and the diamond capillary at the output end of the vortex flowmeter (3) is led out from a sealing gland (11) fixedly installed on the box (1); The end of the tube body (2) located outside the box body (1) is covered with a thermal insulation composite coil (5), while the end located inside the box body (1) is wound with a glass wool cloth (6) of a predetermined length.

2. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 1, characterized in that: The vortex flowmeter (3) is arranged at the center of the box (1).

3. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 1, characterized in that: The port at the top of the box body (1) is provided with a cover (12), and the cover (12) is fixed by a strapping belt (13) provided at the bottom of the box body (1).

4. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 1, characterized in that: A sleeve is fixedly provided on the box body (1), and the end of the sleeve located inside the box body (1) is an inner pipe (71), while the end located outside the box body is an outer pipe (72); The tube body (2) passes through the sleeve and is arranged in the center of the sleeve, and an annular slit is formed between the two; Half of the axial length of the glass wool cloth (6) is wrapped around the inner tube (71), while the other half is wrapped around the tube body (2).

5. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 1, characterized in that: The thermal insulation composite coil (5) comprises a moisture-proof coil (51) surrounding the pipe body (2) and a PVC pipe fitting (52) sleeved on the outside of the moisture-proof coil (51) and embedded in the annular slit.

6. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 5, characterized in that: The thermal insulation composite coil (5) includes a cold-insulating aluminum silicate tube shell (53), one end of the cold-insulating aluminum silicate tube shell (53) is fixed to the outer pipe (72) through an American-style hose clamp, and the other end is fixed to the pipe body (2) through an American-style hose clamp; A cavity is formed between the cold-insulating aluminum silicate tube shell (53) and the PVC pipe fitting (52), and a polyurethane foam block is arranged in the cavity.

7. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 5, characterized in that: The moisture-proof roll (51) is specifically an SBS waterproof roll.

8. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 1, characterized in that: One side of the box body (1) is fixedly connected to a sand discharge hole (14) arranged at the bottom of the box body (1).

9. The cold insulation compartment for cryogenic liquid pipeline flowmeter according to claim 1, characterized in that: One side of the box body (1) is fixedly connected to a sealed air pipeline (15) arranged at the bottom of the box body (1), and a manual valve is serially connected to the sealed air pipeline (15).

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