Device for measuring temperature outside pipe

Abstract

The utility model discloses a device for measuring the temperature outside a pipe, which comprises a metal pipe and a shell sleeved outside the metal pipe, at least one first temperature sensor is arranged inside the shell, the first temperature sensor is attached to the outer wall of the metal pipe, and at least one second temperature sensor is attached to the outer wall of the shell; the interior of the shell is filled with a foaming heat insulation layer; pipeline connectors are arranged at the two ends of the shell, silicone tubes are arranged at the pipeline connectors, and one end of each silicone tube extends into the shell and is in butt joint with one end of a metal tube; according to the utility model, the temperature sensing element is prevented from being directly contacted with the external environment while the close contact between the temperature sensing element and the metal pipe is ensured, the influence of the external environment temperature on the detection temperature of the temperature sensing element is corrected, and the error between the detection value of the temperature sensing element and the water temperature in the pipeline is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline temperature measurement, and relates to an external pipe temperature measurement device. Background Technique

[0002] During the process of aquaculture, it is necessary to monitor the water temperature in the circulating pipeline to control the water temperature inside the aquaculture container within an appropriate temperature range. Most of the existing temperature detection devices for circulating pipelines adopt external temperature sensors, that is, the temperature sensors are attached to the pipe wall of the pipeline through structures such as brackets to indirectly detect the water temperature inside the pipeline. For example, the patent application with the patent application number "CN202023277102.8" discloses a temperature sensor arranged outside a metal pipeline, which fixes the temperature sensing element outside the pipeline through a pipe clamp to achieve contact temperature detection. However, in the above-mentioned existing technologies, the metal pipe is in direct contact with the external environment, resulting in a large influence of the external environmental temperature on the metal pipe. Furthermore, the error value between the temperature value finally measured by the temperature sensing element and the actual water temperature in the pipeline can reach 2-3°C, which obviously cannot meet the precise temperature control requirements inside the aquaculture container. Moreover, for the existing external pipeline temperature detection devices, their temperature sensing elements are always affected by the external environmental temperature. When the difference between the external environmental temperature and the water temperature inside the pipe is too large, it further leads to the detection value of the temperature sensing element exceeding the standard error from the actual water temperature inside the pipeline, and it cannot meet the high-precision temperature control requirements of the aquaculture container.

[0003] Therefore, aiming at the defects of the existing external pipeline temperature detection devices for aquaculture pipelines, such as insufficient detection accuracy and the detection accuracy being easily affected by the external environmental temperature, the utility model discloses an external pipe temperature measurement device. Content of the Utility Model

[0004] The purpose of the utility model is to provide an external pipe temperature measurement device, which can ensure that the temperature sensing element is in close contact with the metal pipe, avoid the direct contact between the temperature sensing element and the external environment, and at the same time correct the influence of the external environmental temperature on the temperature detected by the temperature sensing element, effectively reducing the error between the detection value of the temperature sensing element and the water temperature inside the pipeline.

[0005] The utility model is realized through the following technical solutions:

[0006] An external pipe temperature measurement device includes a metal pipe and a housing sleeved outside the metal pipe. At least one first temperature sensor is arranged inside the housing, the first temperature sensor is attached to the outer wall of the metal pipe, and at least one second temperature sensor is attached to the outer wall of the housing; a foamed heat insulation layer is filled inside the housing; pipeline interfaces are arranged at both ends of the housing, a silica gel pipe is arranged at the pipeline interface, and one end of the silica gel pipe extends into the housing and is butted with one end of the metal pipe.

[0007] Silicone tubes are provided at both ends of the metal tube, with water entering from one end and out from the other end. After water flows into the metal tube through the silicone tube at one end, the temperature of the flowing water is quickly transmitted to the first temperature sensor through the metal tube, and the temperature of the flowing water inside the metal tube can be detected by the first temperature sensor attached to the tube wall of the metal tube. At the same time, the shell forms a relatively closed space outside the metal tube, and a foam insulation layer is filled inside the shell, thereby reducing the influence of the external ambient temperature on the metal tube, and ensuring that the temperature detected by the first temperature sensor is closer to the actual flowing water temperature inside the metal tube. At the same time, a second temperature sensor is arranged on the outer wall of the shell, and the temperature of the external environment is detected by the second temperature sensor. When the difference between the temperature of the external environment detected by the second temperature sensor and the temperature of the flowing water detected by the first temperature sensor exceeds the set threshold, it indicates that the temperature difference between the temperature of the external environment and the temperature of the water flow inside the metal pipe is too large. In order to reduce the error value of the detection result of the first temperature sensor, it is necessary to compensate and correct the measurement result of the first temperature sensor according to the external environment temperature to ensure that the error between the measurement result of the first temperature sensor and the flowing water temperature is within ±0.3°C.

[0008] In order to better implement the utility model, further, two first temperature sensors are symmetrically arranged side by side on both sides of the metal tube inside the shell, and a heat-conducting adhesive layer is arranged between the first temperature sensor and the tube wall of the metal tube.

[0009] In order to better realize the utility model, further, the shell includes an upper cover and a lower cover, the upper cover and the lower cover are correspondingly assembled, an upper clamp is provided at the bottom of the upper cover, and a lower clamp is provided at the top of the lower cover, and the upper clamp cooperates with the lower clamp to clamp and fix the upper and lower tube walls of the metal tube.

[0010] In order to better realize the utility model, further, an upper positioning groove is provided in the middle position of the upper clamp corresponding to the outer contour of the metal tube, and a lower positioning groove is provided in the middle position of the lower clamp corresponding to the outer contour of the metal tube. The upper positioning groove cooperates with the lower positioning groove to clamp and fix the upper and lower tube walls of the metal tube.

[0011] In order to better realize the utility model, further, the upper clamp is provided with upper sensor slots on both sides of the upper positioning slot, and the lower clamp is provided with lower sensor slots on both sides of the lower positioning slot. The upper sensor slot cooperates with the lower sensor slot to clamp and fix the upper and lower sides of the first temperature sensor.

[0012] In order to better implement the present invention, further, a lead wire opening and a welding point are provided on the upper cover or the lower cover, and the wiring of the first temperature sensor passes through the lead wire opening and butts with the welding point.

[0013] In order to better implement the present utility model, further, an installation card slot is provided on the upper cover or the lower cover, and a second temperature sensor is clamped in the installation card slot.

[0014] In order to better implement the present utility model, further, a glue injection port is provided on the upper cover or the lower cover.

[0015] In order to better implement the present utility model, further, an installation step is provided on the upper cover or the lower cover, a sensor PCB board is fixedly installed on the step surface of the installation step, and the sensor PCB board is connected to the first temperature sensor and the second temperature sensor respectively through wiring terminals.

[0016] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0017] (1) By sleeving a housing outside the metal tube, a relatively sealed space is formed outside the metal tube to prevent the metal tube from directly contacting the external environment, thereby reducing the influence of the external environment temperature on the water flow temperature inside the metal tube. At the same time, a foamed heat insulation layer is filled inside the housing to further block the exchange of heat between the external environment and the inside of the housing, so that the error between the detection value of the first temperature sensor and the actual water temperature of the water flow inside the metal tube is within ±0.3°C, greatly improving the temperature detection accuracy.

[0018] (2) By providing a second temperature sensor outside the housing, the temperature of the external environment is detected by the second temperature sensor, and when the difference between the external environment temperature and the detection temperature of the first temperature sensor exceeds a set threshold, the detection result of the first temperature sensor is corrected and compensated, further reducing the adverse influence of the external environment temperature on the detection result of the first temperature sensor and improving the detection accuracy of the first temperature sensor. Description of the Drawings

[0019] Figure 1 Schematic three-dimensional structure diagram of the temperature measuring device outside the tube;

[0020] Figure 2 Cross-sectional view of the temperature measuring device outside the tube;

[0021] Figure 3 Top view of the temperature measuring device outside the tube;

[0022] Figure 4 For Figure 3 A-A cross-sectional view of;

[0023] Figure 5 Schematic installation diagram of the metal tube inside the housing;

[0024] Figure 6 It is a schematic structural diagram of the lower cover;

[0025] Figure 7 It is a schematic structural diagram of the upper cover;

[0026] Figure 8 It is a schematic diagram of the lead port and the glue injection port.

[0027] Wherein: 1 - metal tube; 2 - housing; 3 - foamed heat insulation layer; 4 - silicone tube; 5 - thermal conductive adhesive layer; 6 - lead port; 7 - glue injection port; 100 - first temperature sensor; 200 - second temperature sensor; 211 - upper fixture; 221 - lower fixture. Specific embodiments

[0028] The following detailed descriptions are all illustrative and are intended to provide further explanations of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the present utility model clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] For the convenience of narration, if the words "upper", "lower", "left", and "right" appear in the present utility model, they only indicate the same direction as the upper, lower, left, and right of the drawing itself, and do not limit the structure. It is 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 of the present utility model.

[0031] Term explanation part: The terms "installation", "connection", "connection", "fixation", etc. in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be an internal connection between 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 situations.

[0032] Embodiment 1:

[0033] An external temperature measurement device of this embodiment, such as Figures 1-4As shown in the figure, it includes a metal pipe 1 and a housing 2 sleeved outside the metal pipe 1. At least one first temperature sensor 100 is arranged inside the housing 2, and the first temperature sensor 100 is arranged in contact with the outer wall of the metal pipe 1. At least one second temperature sensor 200 is arranged in contact with the outer wall of the housing 2; a foamed heat insulation layer 3 is filled and arranged inside the housing 2; pipeline interfaces are arranged at both ends of the housing 2, and a silica gel pipe 4 is arranged at the pipeline interface. One end of the silica gel pipe 4 extends into the housing 2 and is butted with one end of the metal pipe 1.

[0034] The housing 2 is sleeved outside the metal pipe 1, so that the cavity inside the housing 2 completely encompasses the metal pipe 1. Furthermore, a relatively sealed space is formed outside the metal pipe 1 through the housing 2, avoiding direct contact between the metal pipe 1 and the external environment, thereby reducing the influence of the external environment temperature on the metal pipe 1. Finally, it ensures that the temperature of the metal pipe 1 measured by the first temperature sensor 100, that is, the temperature of the water flow inside the metal pipe 1, is closer to the actual value and reduces the measurement error. At the same time, in order to further avoid heat exchange between the metal pipe 1 and the external environment and affect the measurement accuracy, a foaming agent is filled in the inner cavity of the housing 2 to form a foamed heat insulation layer 3. The foamed heat insulation layer 3 further blocks the heat exchange between the metal pipe 1 and the external environment. At the same time, the first temperature sensor 100 is pressed by the foamed heat insulation layer 3, so that the measurement terminal of the first temperature sensor 100 is closely attached to the pipe wall of the metal pipe 1, further reducing the measurement error. Finally, the error between the measurement value of the first temperature sensor 100 and the actual temperature value of the water flow inside the metal pipe 1 is within ±0.3°C, which is much higher than the measurement accuracy of the existing external temperature sensor of 2 - 3°C.

[0035] Pipeline interfaces are arranged at both ends of the housing 2, and a silica gel pipe 4 is inserted into the pipeline interface. One end of the silica gel pipe 4 extends into the housing 2 and is butted with one end of the metal pipe 1, that is, it ensures that the metal pipe 1 is completely located inside the housing 2 and prevents direct contact between the metal pipe 1 and the external environment. Moreover, the heat conduction performance of the silica gel pipe 4 is much lower than that of the metal pipe 1, thereby avoiding a large amount of heat from the external environment being transferred to the metal pipe 1 through the silica gel pipe 4. A second temperature sensor 200 is arranged in contact with the outside of the housing 2. The second temperature sensor 200 is used to detect the external environment temperature. When the difference between the external environment temperature and the temperature of the metal pipe 1 exceeds 5°C, it indicates that the temperature difference between the external environment temperature and the water flow inside the metal pipe 1 is too large. At this time, the measurement result of the first temperature sensor 100 needs to be corrected to ensure that the measurement result of the first temperature sensor 100 is closer to the true temperature of the water flowing inside the metal pipe 1.

[0036] Furthermore, in the actual use environment, the silica gel pipe 4 can also be replaced with other pipes with a heat conduction performance less than that of the metal pipe 1, such as being replaced with a plastic pipe or a ceramic pipe.

[0037] Further, after inserting the silica gel tube 4 inside the pipeline interface, it is necessary to fill sealant between the outer wall of the silica gel tube 4 and the inner wall of the pipeline interface to ensure the tightness inside the housing 2.

[0038] Further, the metal tube 1 is made of a copper tube or an aluminum tube with excellent heat conduction performance.

[0039] Embodiment 2:

[0040] A device for measuring the external temperature of a tube, which is improved on the basis of Embodiment 1. As Figure 4 and Figure 5 shown, two first temperature sensors 100 are symmetrically arranged side by side on both sides of the metal tube 1 inside the housing 2, and a heat-conducting glue layer 5 is provided between the first temperature sensors 100 and the tube wall of the metal tube 1.

[0041] The two first temperature sensors 100 are redundantly arranged to form a dual backup. Even if one of the first temperature sensors 100 fails, as long as the other temperature sensor 100 works normally, the normal operation of the entire device for measuring the external temperature of the tube can be ensured. Moreover, by setting two first temperature sensors 100, they can be compared with each other to determine whether the two first temperature sensors 100 are abnormal. That is, when one first temperature sensor 100 is abnormal and the other first temperature sensor 100 is normal, it will cause a significant difference in the temperature values measured and fed back by the two first temperature sensors 100. For example, if the temperature value measured and fed back by the abnormal first temperature sensor 100 is 40 °C, and the temperature value measured and fed back by the normal first temperature sensor is 25 °C, it can be known by comparing the temperature values that the first temperature sensor 100 with a measured temperature value of 40 °C is abnormal and needs to be replaced.

[0042] To improve the heat conduction performance between the first temperature sensor 100 and the metal tube 1, a heat-conducting glue layer 5 is provided between the measuring terminal of the first temperature sensor 100 and the tube wall of the metal tube 1. Through the good heat conductivity of the heat-conducting glue layer 5, the heat of the metal tube 1 is quickly conducted to the measuring terminal of the first temperature sensor 100, avoiding heat dissipation from affecting the measurement accuracy.

[0043] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be elaborated here.

[0044] Embodiment 3:

[0045] A device for measuring the external temperature of a tube, which is improved on the basis of Embodiment 1 or 2. As Figures 4-7As shown, the housing 2 includes an upper cover 21 and a lower cover 22. The upper cover 21 and the lower cover 22 are correspondingly joined together. An upper fixture 211 is provided at the bottom of the upper cover 21, and a lower fixture 221 is provided at the top of the lower cover 22. The upper fixture 211 and the lower fixture 221 cooperate to clamp and fix the upper and lower side walls of the metal tube 1.

[0046] The upper cover 21 and the lower cover 22 are joined together by connecting screws and sealed glue is filled between the mating surfaces of the upper cover 21 and the lower cover 22 to ensure the sealing inside the housing 2. The upper fixture 211 positions and fixes the upper outer contour of the metal tube 1, and the lower fixture 221 positions and fixes the lower outer contour of the metal tube 1, thereby realizing the limit fixation of the metal tube 1 inside the housing 2 and preventing the metal tube 1 from moving randomly and causing a gap between it and the measurement terminal of the first temperature sensor 100, which may affect the final temperature measurement accuracy.

[0047] Further, an upper positioning card slot corresponding to the outer contour of the metal tube 1 is provided at the middle position of the upper fixture 211, and a lower positioning card slot corresponding to the outer contour of the metal tube 1 is provided at the middle position of the lower fixture 221. The upper positioning card slot and the lower positioning card slot cooperate to clamp and fix the upper and lower side walls of the metal tube 1. The upper positioning card slot and the lower positioning card slot are correspondingly joined together to form a circular positioning opening, and the side walls of the metal tube 1 are clamped and fixed through the positioning opening.

[0048] Other parts of this embodiment are the same as those of Embodiment 1 or 2, so they will not be described in detail.

[0049] Embodiment 4:

[0050] An external temperature measurement device, which is improved on the basis of any one of Embodiments 1 - 3. As Figure 6 and Figure 7 shown, sensor upper card slots are provided on both sides of the upper positioning card slot on the upper fixture 211, and sensor lower card slots are provided on both sides of the lower positioning card slot on the lower fixture 221. The sensor upper card slots and the sensor lower card slots cooperate to clamp and fix the upper and lower sides of the first temperature sensor 100.

[0051] The sensor upper card slots and the sensor lower card slots are correspondingly joined together to form a circular sensor positioning opening, and the outer part of the first temperature sensor 100 is clamped by the sensor positioning opening to fix the first sensor 100, so as to ensure that the measurement terminal of the first temperature sensor 100 is in close contact with the side wall of the metal tube 1.

[0052] Other parts of this embodiment are the same as any one of Embodiments 1 - 3, so they will not be described in detail.

[0053] Embodiment 5:

[0054] An external pipe temperature measurement device, which is improved on the basis of any one of Embodiments 1-4. As Figure 8 shown, a lead outlet 6 and a soldering point are provided on the upper cover 21 or the lower cover 22. The wiring of the first temperature sensor 100 passes through the lead outlet 6 and is butted against the soldering point.

[0055] The wiring of the first temperature sensor 100 passes out of the lead outlet 6 and extends to the outside of the housing 2, and is welded to the soldering point provided on the upper cover 21 or the lower cover 22. At the same time, after the wiring passes through the lead outlet 6, it is necessary to fill the lead outlet 6 with resin or sealant to seal the lead outlet 6 and fix the wiring at the same time.

[0056] Other parts of this embodiment are the same as those of any one of Embodiments 1-4, so they will not be described in detail.

[0057] Embodiment 6:

[0058] An external pipe temperature measurement device, which is improved on the basis of any one of Embodiments 1-5. As Figure 1 shown, an installation card slot is provided on the upper cover 21 or the lower cover 22, and a second temperature sensor 200 is clamped in the installation card slot. The second temperature sensor 200 is directly clamped inside the installation card slot to realize the convenient installation of the second temperature sensor 200 outside the housing 2.

[0059] Other parts of this embodiment are the same as those of any one of Embodiments 1-5, so they will not be described in detail.

[0060] Embodiment 7:

[0061] An external pipe temperature measurement device, which is improved on the basis of any one of Embodiments 1-6. As Figure 1 shown, an installation step is provided on the upper cover 21 or the lower cover 22, and a sensor PCB board is fixedly installed on the step surface of the installation step. The sensor PCB board is respectively connected to the first temperature sensor 100 and the second temperature sensor 200 through wiring terminals. The sensor PCB board is fixedly installed on the step surface of the installation step through connection screws. Wiring terminals or soldering points are provided on the sensor PCB board to realize the connection of the wiring of the first temperature sensor 100 and the second temperature sensor 200. The first temperature sensor 100 and the second temperature sensor 200 transmit the measured temperature data to the sensor PCB board. The sensor PCB board uses existing products and is not the improvement point of the present utility model, so the specific structure of the sensor PCB board will not be described in detail here.

[0062] Furthermore, a glue injection port 7 is provided on the upper cover 21 or the lower cover 22. Through the glue injection port 7, the foaming agent can be conveniently filled into the interior of the housing 2 to form a foamed heat insulation layer 3 inside the housing 2.

[0063] Other parts of this embodiment are the same as any one of Embodiments 1-6, so they will not be described in detail herein.

[0064] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A device for measuring the temperature outside a tube, comprising a metal tube (1) and a shell (2) sleeved outside the metal tube (1), characterized in that: At least one first temperature sensor (100) is arranged inside the shell (2), the first temperature sensor (100) is arranged in contact with the outer wall of the metal tube (1), and at least one second temperature sensor (200) is arranged in contact with the outer wall of the shell (2); the interior of the shell (2) is filled with a foam insulation layer (3); both ends of the shell (2) are provided with pipeline interfaces, and a silicone tube (4) is provided at the pipeline interface, and one end of the silicone tube (4) extends to the interior of the shell (2) and is butt-jointed with one end of the metal tube (1).

2. The device for measuring the temperature outside a tube according to claim 1, characterized in that: Two first temperature sensors (100) are symmetrically arranged side by side on both sides of the metal tube (1) inside the shell (2), and a heat-conducting adhesive layer (5) is arranged between the first temperature sensor (100) and the tube wall of the metal tube (1).

3. The device for measuring the temperature outside a tube according to claim 2, characterized in that: The shell (2) comprises an upper cover (21) and a lower cover (22); the upper cover (21) and the lower cover (22) are assembled correspondingly; an upper clamp (211) is arranged at the bottom of the upper cover (21); and a lower clamp (221) is arranged at the top of the lower cover (22); the upper clamp (211) and the lower clamp (221) cooperate to clamp and fix the upper and lower tube walls of the metal tube (1).

4. The device for measuring the temperature outside a tube according to claim 3, characterized in that: An upper positioning slot is provided at a middle position of the upper clamp (211) corresponding to the outer contour of the metal tube (1), and a lower positioning slot is provided at a middle position of the lower clamp (221) corresponding to the outer contour of the metal tube (1), and the upper positioning slot cooperates with the lower positioning slot to clamp and fix the upper and lower tube walls of the metal tube (1).

5. The device for measuring the temperature outside a tube according to claim 4, characterized in that: Upper sensor slots are provided on both sides of the upper positioning slot on the upper clamp (211), and lower sensor slots are provided on both sides of the lower positioning slot on the lower clamp (221), and the upper sensor slots cooperate with the lower sensor slots to clamp and fix the upper and lower sides of the first temperature sensor (100).

6. The device for measuring the temperature outside a tube according to any one of claims 3 to 5, characterized in that: A lead-in port (6) and a welding point are provided on the upper cover (21) or the lower cover (22), and the wiring of the first temperature sensor (100) passes through the lead-in port (6) and butts against the welding point.

7. The device for measuring the temperature outside a tube according to any one of claims 3 to 5, characterized in that: The upper cover (21) or the lower cover (22) is provided with a mounting slot, in which a second temperature sensor (200) is mounted.

8. The device for measuring the temperature outside a tube according to any one of claims 3 to 5, characterized in that: The upper cover (21) or the lower cover (22) is provided with a glue injection port (7).

9. The device for measuring the temperature outside a tube according to any one of claims 3 to 5, characterized in that: The upper cover (21) or the lower cover (22) is provided with a mounting step, a sensor PCB board is fixedly mounted on the step surface of the mounting step, and the sensor PCB board is respectively connected to the first temperature sensor (100) and the second temperature sensor (200) through connection terminals.

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