Pipeline type differential pressure flowmeter for measuring medium easy to vaporize

Abstract

The utility model discloses a pipeline type differential pressure flowmeter for measuring medium easy to vaporize, which comprises a connecting pipe, a three-valve group and a differential pressure transmitter, the upper part of the connecting pipe is communicated with the three-valve group through a pressure guide pipe, and the differential pressure transmitter is arranged on the three-valve group. A detachable thermal insulation sleeve is arranged on the pressure guiding pipe, the thermal insulation sleeve is sequentially provided with a damp-proof layer, a thermal insulation layer and a damp-proof layer from the inner layer to the outer layer, the thermal insulation sleeve is made of flexible materials, steps matched with each other are arranged on the edge portions of the thermal insulation sleeve, and hook-and-loop fasteners are arranged on the attaching faces of the steps. The effect of temperature difference change on fluid entering the pressure guide pipe is weakened through the thermal insulation sleeve, and the measurement accuracy of the flowmeter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow measurement equipment, in particular to a pipeline differential pressure flow meter for measuring easily vaporizable media. Background Art

[0002] The existing technology generally uses a differential pressure flowmeter to measure the flow rate of ethylene in a pipeline. The differential pressure flowmeter generally detects the flow rate of the fluid by detecting the pressure difference caused on both sides of the flowmeter when the fluid passes through the flowmeter. The traditional differential pressure flowmeter is connected to the ethylene pipeline through two pressure pipes. However, as an easily vaporized fluid, ethylene is aggravated by the large temperature change when it flows through the pressure pipe. As a result, a large amount of gaseous ethylene accumulates in the pressure pipe, causing fluctuations in the flow measurement value and measurement errors. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a pipeline differential pressure flowmeter for measuring easily vaporizable media.

[0004] The technical solution of the utility model is: a pipeline differential pressure flowmeter for measuring easily vaporized media, including a connecting pipe, a three-valve group and a differential pressure transmitter, the upper part of the connecting pipe is connected to the three-valve group through a pressure-inducing pipe, and the three-valve group is provided with a differential pressure transmitter. A detachable insulation sleeve is provided on the pressure-inducing pipe, and the insulation sleeve is composed of a moisture-proof layer, a heat-insulating layer and a moisture-proof layer from the inner layer to the outer layer, and the insulation sleeve is made of a flexible material, and the edges of the insulation sleeve are provided with mutually matching steps, and the fitting surface of the steps is provided with Velcro.

[0005] Furthermore, a plurality of positioning protrusions with even intervals are arranged on the circumference of the outer wall of the pressure-inducing tube, and a positioning groove cooperating with the positioning protrusions is arranged on the inner side of the thermal insulation sleeve.

[0006] Furthermore, a plurality of evenly spaced guide grooves are provided on the circumference of the inner wall of the pressure-inducing pipe, and the guide grooves are arranged along the length direction of the pressure-inducing pipe.

[0007] Furthermore, the outermost layer of the thermal insulation sleeve is provided with a PU shell, and the interior of the PU shell is provided with a plurality of connecting columns which are evenly spaced in the circumferential direction, and the connecting columns pass through the moisture-proof layer and the thermal insulation layer.

[0008] Furthermore, a paddle is provided at one end of the insulation sleeve, and a surface of the paddle is provided with anti-slip textures.

[0009] Furthermore, a throttling device is provided inside the connecting pipe, and both ends of the connecting pipe are detachably connected to external pipelines through flanges.

[0010] Compared with the prior art, the utility model has the following advantages: a heat insulation layer is arranged outside the lead-pressure pipe, which in turn reduces the temperature difference change when the fluid passes through the lead-pressure pipe, and reduces the influence of the temperature difference change on the vaporization of the fluid. The detachable flexible insulation sleeve fits tightly with the lead-pressure pipe, is easy to replace, and can be adapted to lead-pressure pipes of various diameters. The moisture-proof layer prevents moisture from penetrating the insulation sleeve and affecting the insulation effect, and the heat insulation layer prevents heat from passing through the insulation sleeve. The mutually interlocking steps and Velcro facilitate the installation or removal of the insulation sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is an overall schematic diagram of the utility model;

[0013] Figure 2 It is a cross-sectional schematic diagram of the main body of the flow meter of the utility model;

[0014] Figure 3 It is a cross-sectional schematic diagram of the thermal insulation sleeve of the utility model.

[0015] Among them: 1. connecting pipe; 2. pressure-leading pipe; 3. temperature insulation sleeve; 4. three-valve group; 5. differential pressure transmitter; 11. throttling device; 21. positioning protrusion; 22. guide groove; 31. step; 32. paddle; 33. PU shell; 34. moisture-proof layer; 35. thermal insulation layer; 331. connecting column; 332. positioning groove. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0017] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0018] like Figures 1 to 3As shown, a pipeline differential pressure flowmeter for measuring easily vaporized media includes a connecting pipe 1, a three-valve group 4 and a differential pressure transmitter 5. The upper part of the connecting pipe 1 is connected to the three-valve group 4 through a pressure pipe 2, and the three-valve group 4 is provided with a differential pressure transmitter 5. A throttling device 11 is provided inside the connecting pipe 1. After the fluid passes through the throttling device 11, different pressures are exerted on both sides of the throttling device 11. The differential pressure transmitter 5 detects the pressure difference on both sides of the throttling device 11 through the pressure pipe 2 to obtain the flow data of the fluid. The two ends of the connecting pipe 1 are detachably connected to the external pipeline through flanges. The detachable flowmeter is easy to replace or repair.

[0019] A detachable insulation sleeve 3 is provided on the pressure-conducting pipe 2. The insulation sleeve 3 is made of a flexible material, and the flexible insulation sleeve 3 fits tightly with the pressure-conducting pipe 2. The edge of the insulation sleeve 3 is provided with a step 31 that fits with each other, and the fitting surface of the step 31 is provided with a Velcro. By tearing the Velcro, the insulation sleeve 3 can be quickly installed or removed. A paddle 32 is provided at one end of the insulation sleeve 3, and the surface of the paddle 32 is provided with an anti-slip pattern. The insulation sleeve 3 is installed or removed by applying an external force to the paddle 32. The insulation sleeve 3 is composed of a moisture-proof layer 34-a heat-insulating layer 35-a moisture-proof layer 34 from the inner layer to the outer layer. The moisture-proof layer 34 can prevent moisture from penetrating the insulation sleeve 3, thereby reducing the adverse effects of moisture on the heat-insulating effect of the insulation sleeve 3. The heat-insulating layer 35 can block heat from passing through the insulation sleeve 3, thereby preventing heat from being transferred to the pressure-conducting pipe 2. The outermost layer of the insulation sleeve 3 is provided with a PU shell 33, and the interior of the PU shell 33 is provided with a plurality of connection columns 331 evenly spaced in the circumferential direction, and the connection columns 331 pass through the moisture-proof layer 34 and the heat-insulating layer 35. The PU shell 33 has good deformation ability and wear resistance, which meets the fit between the insulation sleeve 3 and the lead pressure pipe 2, and improves the wear resistance of the insulation sleeve 3, thereby increasing the service life of the insulation sleeve 3.

[0020] A plurality of evenly spaced positioning protrusions 21 are provided on the circumference of the outer wall of the pressure-conducting pipe 2, and a positioning groove 332 that cooperates with the positioning protrusions 21 is provided on the inner side of the insulation sleeve 3. Through the cooperation between the positioning protrusions 21 and the positioning grooves 332, the insulation sleeve 3 can be quickly positioned in the circumferential direction of the pressure-conducting pipe 2, preventing the insulation sleeve 3 from rotating around the pressure-conducting pipe 2, and preventing friction from reducing the service life of the insulation sleeve 3. A plurality of evenly spaced guide grooves 22 are provided on the circumference of the inner wall of the pressure-conducting pipe 2, and the guide grooves 22 are arranged along the length direction of the pressure-conducting pipe 2. When the fluid passes through the pressure-conducting pipe 2, it passes through the pressure-conducting pipe 2 smoothly under the guidance of the guide grooves 22. Vibration is prevented when the fluid passes through the pressure-conducting pipe 2, and the vibration is prevented from affecting the assembly tightness of the insulation sleeve 3 for a long time.

[0021] The working principle of the specific embodiment of the utility model is as follows: the insulation sleeve 3 creates a heat insulation effect on the outside of the lead pressure pipe 2 to prevent the fluid from being vaporized due to excessive temperature difference after entering the lead pressure pipe 2. The step 31 and the Velcro are used to improve the detachability of the insulation sleeve 3 and the usability of the insulation sleeve 3.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0023] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pipeline differential pressure flowmeter for measuring easily vaporizable media, comprising a connecting pipe (1), a three-valve group (4) and a differential pressure transmitter (5), wherein the upper portion of the connecting pipe (1) is connected to the three-valve group (4) via a pressure-conducting pipe (2), and the three-valve group (4) is provided with the differential pressure transmitter (5), characterized in that: The pressure-conducting pipe (2) is provided with a detachable thermal insulation sleeve (3), and the thermal insulation sleeve (3) comprises a moisture-proof layer (34)-a heat-insulating layer (35)-a moisture-proof layer (34) from the inner layer to the outer layer, respectively. The thermal insulation sleeve (3) is made of a flexible material, and the edges of the thermal insulation sleeve (3) are provided with mutually matching steps (31), and the fitting surfaces of the steps (31) are provided with Velcro.

2. The pipeline differential pressure flowmeter for measuring easily vaporizable media according to claim 1, characterized in that: A plurality of evenly spaced positioning protrusions (21) are provided on the circumference of the outer wall of the pressure-guiding tube (2), and a positioning groove (332) matching the positioning protrusions (21) is provided on the inner side of the thermal insulation sleeve (3).

3. The pipeline differential pressure flowmeter for measuring easily vaporizable media according to claim 1, characterized in that: A plurality of evenly spaced guide grooves (22) are provided on the circumference of the inner wall of the pressure-inducing tube (2), and the guide grooves (22) are arranged along the length direction of the pressure-inducing tube (2).

4. The pipeline differential pressure flowmeter for measuring easily vaporizable media according to claim 1, characterized in that: The outermost layer of the thermal insulation sleeve (3) is provided with a PU shell (33), and the interior of the PU shell (33) is provided with a plurality of connection columns (331) evenly spaced in the circumferential direction, and the connection columns (331) pass through the moisture-proof layer (34) and the thermal insulation layer (35).

5. The pipeline differential pressure flowmeter for measuring easily vaporizable media according to claim 1, characterized in that: One end of the temperature insulation sleeve (3) is provided with a paddle (32), and the surface of the paddle (32) is provided with anti-slip patterns.

6. The pipeline differential pressure flowmeter for measuring easily vaporizable media according to claim 1, characterized in that: A throttling piece (11) is provided inside the connecting pipe (1), and both ends of the connecting pipe (1) are detachably connected to external pipelines via flanges.

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