CN211978142U - Accurate temperature-detecting device of current transmission type - Google Patents
Accurate temperature-detecting device of current transmission type Download PDFInfo
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- CN211978142U CN211978142U CN202021046106.2U CN202021046106U CN211978142U CN 211978142 U CN211978142 U CN 211978142U CN 202021046106 U CN202021046106 U CN 202021046106U CN 211978142 U CN211978142 U CN 211978142U
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- circuit board
- waterproof
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- detecting device
- accurate temperature
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Abstract
The utility model discloses an accurate temperature-detecting device of current transmission type, including the circuit board that detects casing, waterproof screwed joint, silica gel circle and current loop type, the front end that detects the casing is provided with detects the head, and the rear end tip that detects the casing is provided with the storage tank, and the storage tank embeds there is the circuit board, is provided with the screw thread on the notch end inner wall of storage tank, and waterproof screwed joint threaded connection is in storage tank notch end, and waterproof screwed joint is its front end through the silica gel circle sticiss on the circuit board under being screwed up the condition. The utility model utilizes the waterproof screw joint for connection, so as to package the installation circuit board and make it have waterproof performance; the core element of the circuit board adopts current to transmit signals to form a current ring-shaped circuit board, and because the current is insensitive to noise, the circuit board is favorable for long-distance wired transmission of the signals, and effectively improves the detection accuracy.
Description
Technical Field
The utility model relates to a temperature measurement belongs to temperature sensor technical field, especially an accurate temperature-detecting device of current transmission type.
Background
A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The common temperature detection sensing equipment adopts voltage signal transmission, and has the following problems:
firstly, because the signal transmitted by the common temperature detection sensing equipment is a voltage signal, the transmission line can be interfered by noise; secondly, the distributed resistance of the transmission line generates a voltage drop; thirdly, signal attenuation problem of long-distance wired transmission; fourth, the problem of how to provide the operating voltage of the instrumentation amplifier in the field.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to the above-mentioned problems, and provides a current transmission type precise temperature detecting device, which employs a current loop circuit board to effectively improve the detection precision.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
the utility model provides an accurate temperature-detecting device of current transmission type, is including detecting the casing, waterproof screwed joint, the circuit board of silica gel circle and current loop type, and the front end that detects the casing is provided with detects the head, and the rear end tip that detects the casing is provided with the storage tank, and the storage tank embeds there is the circuit board, is provided with the screw thread on the notch end inner wall of storage tank, and waterproof screwed joint threaded connection is in storage tank notch end, and waterproof screwed joint is its front end through the silica gel circle sticiss on the circuit board under the condition of being screwed up.
As an option, the waterproof screw joint is hollow to form a receiving hole, so as to be used as a through hole for connecting a cable, or further performing a waterproof sealing operation.
As an option, the detection housing accommodating groove is filled with an epoxy resin glue layer through the bearing hole. Epoxy resin glue is filled in the accommodating groove with the circuit board, and after the epoxy resin glue is cured, a closed isolation structure is formed, so that the waterproof effect can be more effectively improved.
As an option, the waterproof screw joint includes a nut, a stud and a waterproof rubber pad, the nut is connected to one end of the stud by screw threads, the waterproof rubber pad is arranged at the other end of the stud in a penetrating manner, and the waterproof rubber pad is connected to the containing groove at the rear end of the detection shell by screw threads. Wherein nut and double-screw bolt cavity form and accept the hole, and the nut rear end disposes the linkage segment of making by the material of being connected the better effect with the epoxy glue film, can more effectual improvement water-proof effects.
As an option, the outer wall of the detection head is prism-shaped so as to be mounted and dismounted in combination with an appliance such as a wrench. As an option, the outer wall of the detection head is in the shape of a regular prism.
As an option, the middle part of the front end of the circuit board is provided with a probe which protrudes outwards, the middle part of the bottom wall of the accommodating groove is provided with a detection groove, the probe is arranged in the detection groove, and gaps are respectively reserved between the probe and the side wall and the bottom wall of the detection groove. Wherein the position of the detection groove is positioned on the detection head at the front end of the detection shell. Therefore, the heat conduction mode and efficiency of the periphery of the probe are basically consistent, and the probe is prevented from being contacted with one side of the detection shell to influence the detection effect. As an option, a positioning groove is arranged in the middle of the bottom wall of the accommodating groove, and the detection groove is positioned in the middle of the positioning groove to position the circuit board so that the probe is positioned in the middle of the circuit board.
As an option, the silica gel ring is in a ring shape, and the outer diameter of the silica gel ring is matched with the outer diameter of the end thread of the notch of the accommodating groove. So, under waterproof screwed joint oppression, silica gel circle and screw surface and waterproof screwed joint front end terminal surface in close contact with form isolation structure, have certain prevention leakage effect, prevent outside water infiltration, perhaps prevent that the epoxy glue liquid infiltration of sealed usefulness causes to bond the back and is difficult to dismantle.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:
the current transmission type accurate temperature detection device of the utility model utilizes the waterproof screw joint for connection, so as to package the installation circuit board and enable the installation circuit board to have waterproof performance; the core element of the circuit board adopts current to transmit signals to form a current ring-shaped circuit board, and because the current is insensitive to noise, the circuit board is favorable for long-distance wired transmission of the signals, and effectively improves the detection accuracy.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded schematic view of the present invention.
Fig. 3 is a schematic diagram of the internal structure of the present invention.
In the attached drawing, the device comprises a detection shell 1, a detection head 11, a detection head 12, a containing groove 13, a detection head 2, a waterproof screw joint 3, a silica gel ring 4 and a circuit board.
Detailed Description
Examples
Referring to fig. 1 to 3, the current transmission type precise temperature detecting device of the present embodiment includes a detecting housing 1, a waterproof screw connector 2, a silica gel ring 3, and a current ring-shaped circuit board 4, wherein the detecting head 2 is disposed at the front end of the detecting housing 1, an accommodating groove 12 is disposed at the rear end of the detecting housing 1, the circuit board 4 is disposed in the accommodating groove 12, a thread is disposed on the inner wall of the notch end of the accommodating groove, the waterproof screw connector 2 is in threaded connection with the notch end of the accommodating groove, and the front end of the waterproof screw connector 2 is pressed on the circuit board 4 through the silica gel ring 3 when the waterproof screw connector 2 is screwed down.
As mentioned above, the present invention utilizes the waterproof screw joint for connection, so as to package the mounting circuit board and make it have waterproof performance; the core element of the circuit board adopts current to transmit signals to form a current ring-shaped circuit board, and because the current is insensitive to noise, the circuit board is favorable for long-distance wired transmission of the signals, and effectively improves the detection accuracy.
The waterproof screwed joint will be described below.
Referring to fig. 1-3, as an option, in one example, the waterproof screw joint is hollow to form a receiving hole for connecting a cable through hole, or further pouring curable liquid to seal the through hole for waterproof operation (wireless transmission mode), or pouring curable liquid after the cable is led in. Of course, the waterproof screw joint can also be a plug-shaped structure, and directly plugs the accommodating groove.
Based on the foregoing example, as an option, the detection housing accommodating groove 12 is filled with an epoxy resin glue layer through the receiving hole. Epoxy resin glue is filled in the accommodating groove with the circuit board, and after the epoxy resin glue is cured, a closed isolation structure is formed, so that the waterproof effect can be more effectively improved.
Based on the foregoing example, as an option, the waterproof screw joint 2 includes a nut, a stud and a waterproof rubber pad, the nut is screwed to one end of the stud, the waterproof rubber pad is threaded to the other end of the stud, and the nut is screwed to the receiving groove at the rear end of the detection housing. Wherein nut and double-screw bolt cavity form and accept the hole, and the nut rear end disposes the linkage segment of making by the material of being connected the better effect with the epoxy glue film, can more effectual improvement water-proof effects.
The housing will be described below.
Referring to fig. 1-3, the outer wall of the rear end of the housing is cylindrical, the outer wall of the front end is prismatic, and the end of the front end is conical. The housing may be made of steel or stainless steel, etc.
Based on the foregoing example, as an option, the outer wall of the detection head 11 is prism-shaped, so as to be mounted and dismounted in combination with an appliance such as a wrench, and the like, so as to reduce the dismounting difficulty of a maintenance worker. Preferably, the outer wall of the detection head is in a regular prism shape so as to be better adapted to the dismounting and mounting appliance.
Based on the foregoing example, as an option, the front middle portion of the circuit board 4 is configured with a probe protruding outward, the bottom wall of the accommodating groove 12 is provided with a detecting groove 13 at a middle position, the probe is disposed in the detecting groove, and the probe and the side wall and the bottom wall of the detecting groove are respectively spaced. Wherein the position of the detection groove is positioned on the detection head at the front end of the detection shell. Therefore, the heat conduction mode and efficiency of the periphery of the probe are basically consistent, and the probe is prevented from being contacted with one side of the detection shell to influence the detection effect. Preferably, the middle position of the bottom wall of the accommodating groove is provided with a positioning groove, and the detection groove is positioned in the middle position of the positioning groove so as to position the circuit board and enable the probe to be positioned in the middle position.
The silicone ring will be described below.
Referring to fig. 2-3, the silicone ring is a washer made of silicone.
Based on the foregoing example, as an option, the silicone ring 3 has a ring shape, and the outer diameter thereof is matched with the outer diameter of the screw thread at the notch end of the accommodating groove. So, under waterproof screwed joint oppression, silica gel circle and screw surface and waterproof screwed joint front end terminal surface in close contact with form isolation structure, have certain prevention leakage effect, prevent outside water infiltration, prevent that the epoxy glue liquid infiltration of sealed usefulness causes to bond the back and is difficult to dismantle.
The detection device has the advantages that:
1. the detection head structure of the detection device and the waterproof screw joint can be easily disassembled and assembled, and resource waste caused by the problems that the disassembly is difficult to maintain or the disassembly causes damage and the like can be solved.
2. Utilize casing and waterproof screwed joint and silica gel circle to combine closely, fill epoxy glue in the casing inner chamber again, form the epoxy glue film after the solidification, can more effectual improvement water-proof effects, can solve the not high problem that leads to its life significantly reduced of waterproof grade.
3. The core element of the circuit board adopts current to transmit signals, and the current is not sensitive to noise, so that the long-distance wired transmission of the signals is facilitated. For example, a 4-20 mA current ring-shaped circuit board is adopted, 4mA is used for representing a zero signal, 20mA is used for representing the full scale of the signal, and the signal which is lower than 4mA and higher than 20mA is used for alarming various faults. The current ring type circuit board is the existing technology, which refers to "an integrated platinum resistance temperature transmitter" (CN209485565U) and the like.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, when referring to the orientation or positional relationship shown in the drawings, are only used for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated.
The above description is intended to illustrate and describe the preferred embodiments of the invention, but not to limit the scope of the invention, and all equivalent changes and modifications made in accordance with the teachings of the present invention are intended to be covered by the present invention.
Claims (9)
1. The utility model provides an accurate temperature-detecting device of current transmission type which characterized in that: including the circuit board that detects casing, waterproof screwed joint, silica gel circle and current loop type, the front end that detects the casing is provided with detects the head, the rear end tip that detects the casing is provided with the storage tank, the storage tank embeds there is the circuit board, be provided with the screw thread on the notch end inner wall of storage tank, waterproof screwed joint threaded connection is in storage tank notch end, and waterproof screwed joint is its front end through silica gel circle sticiss on the circuit board under the condition of being screwed up.
2. The current-carrying type accurate temperature detecting device according to claim 1, wherein: the waterproof screw joint is hollow to form a bearing hole.
3. A current transfer type accurate temperature detecting device according to claim 2, wherein: an epoxy resin adhesive layer is filled in the detection shell accommodating groove through the bearing hole.
4. The current-carrying type accurate temperature detecting device according to claim 1, wherein: the waterproof screw joint comprises a screw cap, a stud and a waterproof rubber pad, the screw cap is in threaded connection with one end of the stud, the waterproof rubber pad penetrates through the other end of the stud, and the waterproof rubber pad is in threaded connection with a containing groove in the rear end of the detection shell.
5. The current-carrying type accurate temperature detecting device according to claim 1, wherein: the outer wall of the detection head is prism-shaped.
6. The current transfer type accurate temperature detecting device according to claim 5, wherein: the outer wall of the detection head is in a regular prism shape.
7. The current-carrying type accurate temperature detecting device according to claim 1, wherein: the middle part of the front end of the circuit board is provided with a probe which protrudes outwards, the middle part of the bottom wall of the accommodating groove is provided with a detection groove, the probe is arranged in the detection groove, and gaps are respectively reserved between the probe and the side wall and the bottom wall of the detection groove.
8. The current transfer type accurate temperature detecting device according to claim 7, wherein: the locating groove is arranged in the middle of the bottom wall of the containing groove, and the detection groove is located in the middle of the locating groove so as to locate the circuit board and enable the probe to be located in the middle of the circuit board.
9. The current-carrying type accurate temperature detecting device according to claim 1, wherein: the silica gel circle is the annular form, and its external diameter and the external diameter looks adaptation of storage tank notch end screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021046106.2U CN211978142U (en) | 2020-06-09 | 2020-06-09 | Accurate temperature-detecting device of current transmission type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021046106.2U CN211978142U (en) | 2020-06-09 | 2020-06-09 | Accurate temperature-detecting device of current transmission type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211978142U true CN211978142U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021046106.2U Active CN211978142U (en) | 2020-06-09 | 2020-06-09 | Accurate temperature-detecting device of current transmission type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211978142U (en) |
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2020
- 2020-06-09 CN CN202021046106.2U patent/CN211978142U/en active Active
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