Metal scraper flowmeter with preheating function

Abstract

The utility model belongs to the technical field of flow metering equipment, and provides a metal scraper flowmeter with a preheating function, which comprises a flowmeter main body provided with a first mounting cavity, a rotor, a cam and a scraper are mounted in the first mounting cavity, and the metal scraper flowmeter further comprises a preheating component sleeved outside the first mounting cavity. And the preheating assembly is used for heating the first mounting cavity, so that the condensing medium in the first mounting cavity is changed into a working state from a condensing state. The metal scraper flowmeter with the preheating function is simple in structure, reasonable in design and convenient to operate, and preheating can be carried out to change a condensation medium from a condensation state to a working state.

Description

Technical Field

[0001] The utility model relates to the technical field of flow metering devices, and particularly relates to a metal scraper flowmeter with a preheating function. Background Art

[0002] As a commonly used flow metering device, the scraper flowmeter is widely used in industries such as petrochemical industry. During the process of measuring the condensate medium, when restarting the flowmeter, it is first necessary to preheat the flowmeter to make the medium in the flowmeter become a liquid in the working state, and then the flowmeter can be started. However, the existing scraper flowmeters in the prior art do not have a preheating function. When restarting the flowmeter, an external heat source is required to preheat the flowmeter to make the medium in the flowmeter become a liquid in the working state, and the operation is cumbersome. Content of the Utility Model

[0003] Aiming at the defects in the prior art, the purpose of the utility model is to provide a metal scraper flowmeter with a preheating function to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0004] To achieve the above purpose, the utility model provides a metal scraper flowmeter with a preheating function, which includes a flowmeter main body. The flowmeter main body has a first installation cavity, and a rotor, a cam and a scraper are installed in the first installation cavity. It also includes a preheating component, and the preheating component is sleeved outside the first installation cavity. The preheating component is used to heat the first installation cavity so that the condensate medium in the first installation cavity changes from the condensate state to the working state.

[0005] Further, the preheating component includes:

[0006] A housing, which is sleeved outside the first installation cavity, and a second installation cavity is jointly defined by the inner side wall of the housing and the outer side wall of the first installation cavity;

[0007] A heating element, which is arranged in the second installation cavity; and

[0008] A control unit, and the control unit is used to control the heating power of the heating element so that the heating temperature of the heating element is maintained within a preset range.

[0009] Further, the heating element is an electric heating wire or an electric heating plate.

[0010] Further, the control unit includes:

[0011] A temperature sensor, which is arranged on the housing; and

[0012] A temperature control module, which is arranged on the housing, and the temperature control module is electrically connected to the heating element and the temperature sensor;

[0013] Among them, the temperature sensor is used to detect the temperature information of the heating element and convert the detected temperature information into a corresponding electrical signal and transmit it to the temperature control module;

[0014] The temperature control module is used to convert the received electrical signal into a corresponding control signal to control the working state of the heating element.

[0015] Further, the heating element is an electric heating plate, and the heating element includes:

[0016] A first plate body, the cross-section of which is semi-circular, and the first plate body is buckled on the outer side wall of the first installation cavity;

[0017] A second plate body, the cross-section of which is semi-circular, and notches are correspondingly arranged on both sides of the second plate body to cooperate with the liquid inlet pipe and the liquid outlet pipe of the flow meter. The second plate body is arranged opposite to the first plate body and is buckled on the outer side wall of the first installation cavity; and

[0018] A third plate body, which is arranged at the notch.

[0019] Further, the mutually cooperating side walls of the first plate body, the second plate body and the third plate body are respectively provided with mutually cooperating jacks and insertion parts.

[0020] Further, the heating element includes a heat pipe, and the heat pipe is communicated with the heat supply system.

[0021] Further, the control unit includes:

[0022] A temperature sensor, which is arranged on the outer shell;

[0023] A flow control valve, which is arranged on the heat pipe; and

[0024] A temperature control module, which is arranged on the outer shell, and the temperature control module is electrically connected to the flow control valve and the temperature sensor;

[0025] Among them, the temperature sensor is used to detect the temperature information of the heating element and convert the detected temperature information into a corresponding electrical signal and transmit it to the temperature control module;

[0026] The temperature control module is used to convert the received electrical signal into a corresponding control signal to control the working state of the flow control valve.

[0027] Further, an insulating and heat-insulating layer is arranged on the inner side wall of the outer shell.

[0028] The beneficial effects of the present utility model:

[0029] The metal scraper flowmeter with a preheating function provided by the present utility model has a simple structure and a reasonable design. By setting a preheating component, the first installation cavity can be heated, so as to change the condensed medium in the first installation cavity from a condensed state to a working state, and the operation is convenient. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 Stereoscopic view of the metal scraper flowmeter with a preheating function provided by the first embodiment of the present utility model;

[0032] Figure 2 For Figure 1 Cross-sectional view of the metal scraper flowmeter with a preheating function shown;

[0033] Figure 3 For Figure 1 Exploded stereoscopic view of the electric heating plate of the metal scraper flowmeter with a preheating function shown;

[0034] Figure 4 For Figure 1 Circuit principle block diagram of the metal scraper flowmeter with a preheating function shown;

[0035] Figure 5 Stereoscopic view of the metal scraper flowmeter with a preheating function provided by the second embodiment of the present utility model;

[0036] Figure 6 For Figure 5 Cross-sectional view of the metal scraper flowmeter with a preheating function shown;

[0037] Figure 7 For Figure 5 Circuit principle block diagram of the metal scraper flowmeter with a preheating function shown.

[0038] Reference Numerals:

[0039] 100, Flowmeter main body; 110, First installation cavity; 120, Liquid inlet pipe; 130, Liquid outlet pipe; 200, Rotor; 300, Cam; 400, Scraper; 510, Housing; 520, Second installation cavity; 530, Electric heating plate; 531, First plate body; 532, Second plate body; 533, Third plate body; 501, Jack; 502, Insertion part; 503, Notch; 540, Heat pipe; 551, Temperature sensor; 552, Temperature control module; 553, Flow control valve; 560, Insulating and heat-insulating layer. Detailed implementation manners

[0040] The embodiments of the technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and therefore are only examples and cannot be used to limit the protection scope of the present utility model.

[0041] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0042] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 to the present utility model.

[0043] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. 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.

[0045] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0046] As Figures 1-7 shown, the present utility model provides a metal scraper flowmeter with a preheating function, which includes a flowmeter main body 100. The flowmeter main body 100 has a first installation cavity 110, and a rotor 200, a cam 300 and a scraper 400 are installed in the first installation cavity 110.

[0047] Among them, the rotor 200 is rotatably connected to the flowmeter main body 100. The cam 300 is fixedly connected to the flowmeter main body 100. The scraper 400 is slidably connected to the rotor 200, so that the scraper 400 can move radially along the rotor 200, and at the same time, it can also rotate together with the rotor 200. A plurality of scrapers 400 are provided, and the plurality of scrapers 400 are evenly arranged around the axis of the rotor 200. These are all prior arts and will not be elaborated here.

[0048] The metal scraper flowmeter with a preheating function provided in this embodiment further includes a preheating component. The preheating component is sleeved outside the first installation cavity 110, and the preheating component is used to heat the first installation cavity 110, so that the condensed medium in the first installation cavity 110 changes from a condensed state to a working state.

[0049] Specifically, during the process of measuring the condensed medium, before restarting the flowmeter, the preheating component is started. The preheating component heats the first installation cavity 110, so that the temperature of the condensed medium in the first installation cavity 110 rises, thereby achieving the purpose of changing the condensed medium from a condensed state to a working state, and the operation is convenient.

[0050] As Figure 2 、 6 shown, in this embodiment, the preheating component includes a housing 510, a heating element and a control unit.

[0051] Among them, the housing 510 is sleeved outside the first installation cavity 110, and a second installation cavity 520 is jointly defined by the inner side wall of the housing 510 and the outer side wall of the first installation cavity 110. The heating element is installed in the second installation cavity 520, and the heating element is used to transfer heat to the flowmeter main body. The control unit is used to control the heating power of the heating element, so that the heating temperature of the heating element is kept within a preset range.

[0052] Specifically, when the heating temperature of the heating element exceeds the first preset value, the control unit controls the heating power of the heating element to decrease, so that the heating temperature of the heating element decreases; when the heating temperature of the heating element is lower than the second preset value, the control unit controls the heating power of the heating element to increase, so that the heating temperature of the heating element increases. Herein, the second preset value is less than the first preset value.

[0053] The preheating assembly provided in this embodiment can not only heat the first installation cavity 110, but also has a simple structure, and can control the heating temperature of the heating element within a preset range, so as to avoid damaging the flowmeter and the condensation medium due to too high heating temperature. At the same time, it can also avoid hurting the staff due to too high temperature.

[0054] In one embodiment, the heating element is an electric heating wire or an electric heating plate.

[0055] Such as Figure 2 and 3 shown, in this embodiment, the control unit includes a temperature sensor 551 and a temperature control module 552.

[0056] Among them, the temperature sensor 551 is arranged on the housing 510. The temperature control module 552 is arranged on the housing 510, and the temperature control module 552 is electrically connected to the heating element and the temperature sensor 551.

[0057] Among them, the temperature sensor 551 is used to detect the temperature of the heating element and convert the detected information into a corresponding electrical signal and transmit it to the temperature control module 552. The temperature control module 552 is used to convert the received electrical signal into a corresponding control signal to control the heating power of the heating element.

[0058] Specifically, when the temperature sensor 551 detects that the temperature of the heating element exceeds the first preset value, the temperature sensor 551 converts the detected information into a corresponding electrical signal and transmits it to the temperature control module 552. The temperature control module 552 generates a corresponding control signal according to the received information, so as to control the heating element to reduce the heating power of the heating element; when the temperature sensor 551 detects that the temperature of the heating element is lower than the second preset value, the temperature sensor 551 converts the detected information into a corresponding electrical signal and transmits it to the temperature control module 552. The temperature control module 552 generates a corresponding control signal according to the received information, so as to control the heating element to increase the heating power of the heating element.

[0059] The control unit provided in this embodiment has a simple structure and can adjust the heating power of the heating element as needed, so as to keep the heating temperature of the heating element within a preset range.

[0060] Such asFigure 3 As shown, in this embodiment, the heating element is an electric hot plate 530, and the heating element includes a first plate body 531, a second plate body 532, and a third plate body 533.

[0061] The cross-section of the first plate body 531 is semi-circular, and the first plate body 531 is buckled on the outer side wall of the first installation cavity 110. The cross-section of the second plate body 532 is semi-circular, and notches 503 are correspondingly arranged on both sides of the second plate body 532 and are matched with the liquid inlet pipe 120 and the liquid outlet pipe 130 of the flow meter. The second plate body 532 is arranged opposite to the first plate body 531 and is buckled on the outer side wall of the first installation cavity 110. The third plate body 533 is arranged at the notch 503. And the first plate body 531, the second plate body 532, and the third plate body 533 are electrically connected. It should be noted here that the first plate body 531, the second plate body 532, and the third plate body 533 can be connected in series through wires, connecting electrodes, etc., or can be electrically connected to the power supply through wires respectively, so as to be connected in parallel.

[0062] In this embodiment, both the first plate body 531 and the second plate body 532 adopt a semi-circular design, so that the inner side walls of the first plate body 531 and the second plate body 532 can be closely attached to the outer side wall of the first installation cavity 110 to form a circular wrapping surface, maximizing the contact area between the heating element and the flow meter main body 100, reducing the heat conduction gap, and improving the heating efficiency. At the same time, the first plate body 531 and the second plate body 532 are arranged opposite to each other to form a split-type assembly structure, which is convenient for the installation and disassembly of the heating element and reduces the maintenance cost.

[0063] The setting of the notch 503 avoids interference at the corresponding positions of the second plate body 532 and the liquid inlet pipe 120 and the liquid outlet pipe 130, so as to achieve the purpose of convenient installation.

[0064] The setting of the third plate body 533 enables the heating element to completely wrap all the outer side walls of the first installation cavity 110 except at the liquid inlet pipe 120 and the liquid outlet pipe 130, so as to achieve the purpose of reducing the heating blind area.

[0065] At the same time, when a certain plate body is aged or damaged due to long-term use, it can be disassembled and replaced separately without removing the heating element as a whole, reducing the maintenance cost.

[0066] As Figure 3 shown, in this embodiment, mutually matching jacks 501 and inserting parts 502 are respectively arranged on the mutually matching side walls of the first plate body 531, the second plate body 532, and the third plate body 533.

[0067] In this embodiment, through the cooperation of the jack 501 and the inserting part 502, the first plate body 531, the second plate body 532, and the third plate body 533 can be connected more tightly, improving the connection stability.

[0068] As Figure 5 , 6 shown, in this embodiment, the heating element includes a heat pipe 540, the heat pipe 540 is wound in the second installation cavity 520, and the heat pipe 540 is communicated with the heat supply system, so as to form a medium loop between the heat pipe 540 and the heat supply system. It should be noted that the heat pipe 540 can be wound around the flowmeter main body 100 in a spiral shape, or can be wound around the flowmeter main body 100 in a serpentine shape, and of course, it can also be wound around the flowmeter main body 100 in a combination of spiral and serpentine shapes. At the same time, the heat supply system can be a heat supply system for independent heating, or can be a recovery of the heat of other equipment.

[0069] During operation, a high-temperature medium is filled into the heat pipe 540 through the heat supply system, the high-temperature medium transfers heat to the heat pipe 540, and the heat pipe 540 transfers heat to the flowmeter main body 100, so as to achieve the purpose of heating the first installation cavity 110. The medium that transfers heat to the heat pipe 540 returns to the heat supply system and is reheated.

[0070] In this embodiment, by setting the heat pipe 540, the heat recovered from other equipment in the working area can be used to heat the flowmeter, so as to achieve the purpose of saving energy and reducing costs.

[0071] As Figure 6 , 7 shown, the control unit includes a temperature sensor 551, a flow control valve 553 and a temperature control module 552.

[0072] Among them, the temperature sensor 551 is arranged on the housing 510. The flow control valve 553 is arranged on the heat pipe 540. The temperature control module 552 is arranged on the housing 510, and the temperature control module 552 is electrically connected to the flow control valve 553 and the temperature sensor 551.

[0073] Among them, the temperature sensor 551 is used to detect the temperature information of the heating element and convert the detected temperature information into a corresponding electrical signal and transmit it to the temperature control module 552. The temperature control module 552 is used to convert the received electrical signal into a corresponding control signal to control the working state of the flow control valve 553.

[0074] Specifically, when the temperature sensor 551 detects that the temperature of the heating element exceeds the first preset value, the temperature sensor 551 transmits the detected information to the temperature control module 552, and the temperature control module 552 controls the flow control valve 553 to reduce the flow rate of the heating medium; when the temperature sensor 551 detects that the temperature of the heating element is lower than the second preset value, the temperature sensor 551 transmits the detected information to the temperature control module 552, and the temperature control module 552 controls the flow control valve 553 to increase the flow rate of the heating medium. Among them, the second preset value is less than the first preset value

[0075] As Figure 2 , 6 shown, in this embodiment, an insulating and heat-insulating layer 560 is provided on the inner side wall of the outer shell 510 to reduce the heat loss of the heating element, so as to achieve the purpose of saving resources and reducing costs. Specifically, the insulating and heat-insulating layer 560 is made of materials such as glass fiber, asbestos, rock wool, and foam. Of course, it can also be a vacuum plate made of rubber or plastic.

[0076] In the description of the present utility model, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model.

Claims

1. A metal scraper flowmeter with a preheating function, comprising a flowmeter main body (100), the flowmeter main body (100) having a first installation cavity (110), a rotor (200), a cam (300) and a scraper (400) being installed in the first installation cavity (110), characterized in that, It further includes a preheating component which is sleeved outside the first installation cavity (110), and the preheating component is used to heat the first installation cavity (110) so that the condensation medium in the first installation cavity (110) changes from the condensation state to the working state.

2. The metal scraping flowmeter with a preheating function according to claim 1, wherein The preheating component includes: A housing (510) which is sleeved outside the first installation cavity (110), and a second installation cavity (520) is jointly defined by the inner side wall of the housing (510) and the outer side wall of the first installation cavity (110); A heating element which is arranged in the second installation cavity (520); and A control unit which is used to control the heating power of the heating element so that the heating temperature of the heating element is maintained within a preset range.

3. The metal scraping flowmeter with a preheating function according to claim 2, characterized in that, The heating element is an electric heating wire or an electric heating plate (530).

4. The metal scraping flowmeter with a preheating function according to claim 3, characterized in that, The control unit includes: A temperature sensor (551) which is arranged on the housing (510); and A temperature control module (552) which is arranged on the housing (510), and the temperature control module (552) is electrically connected to the heating element and the temperature sensor (551); Wherein, the temperature sensor (551) is used to detect the temperature information of the heating element and convert the detected temperature information into a corresponding electrical signal and transmit it to the temperature control module (552); The temperature control module (552) is used to convert the received electrical signal into a corresponding control signal to control the working state of the heating element.

5. The metal scraping flowmeter with a preheating function according to claim 2, characterized in that, The heating element is an electric heating plate (530), and the heating element includes: A first plate body (531) whose cross-section is semi-circular, and the first plate body (531) is buckled on the outer side wall of the first installation cavity (110); A second plate body (532) whose cross-section is semi-circular, and notches (503) are correspondingly arranged on both sides of the second plate body (532) to cooperate with the liquid inlet pipe (120) and the liquid outlet pipe (130) of the flowmeter. The second plate body (532) is arranged opposite to the first plate body (531) and buckled on the outer side wall of the first installation cavity (110); and A third plate body (533) which is arranged at the notch (503).

6. The metal scraper flowmeter with a preheating function according to claim 5, characterized in that, The mutually cooperating side walls of the first plate body (531), the second plate body (532) and the third plate body (533) are respectively provided with mutually cooperating jacks (501) and insertion parts (502).

7. The metal scraping flowmeter with a preheating function according to claim 2, characterized in that, The heating element includes a heat pipe (540) which is wound in the second installation cavity (520), and the heat pipe (540) is communicated with a heating system.

8. The metal scraper flowmeter with a preheating function according to claim 7, characterized in that, The control unit includes: A temperature sensor (551) which is arranged on the housing (510); A flow control valve (553) which is arranged on the heat pipe (540); and A temperature control module (552) which is arranged on the housing (510), and the temperature control module (552) is electrically connected to the flow control valve (553) and the temperature sensor (551); Among them, the temperature sensor (551) is used to detect the temperature information of the heating element and convert the detected temperature information into a corresponding electrical signal and transmit it to the temperature control module (552); The temperature control module (552) is used to convert the received electrical signal into a corresponding control signal to control the working state of the flow control valve (553).

9. The metal scraper flowmeter with preheating function according to any one of claims 2-8, characterized in that, An insulating and heat-insulating layer (560) is provided on the inner side wall of the housing (510).

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