High-temperature contact type displacement sensor
By designing a ceramic measuring rod and cooling water pipe, the problem of contact displacement sensors failing to operate in high-temperature environments was solved, achieving accuracy in high-temperature deformation measurement and protecting the equipment while reducing costs.
Patent Information
- Application Number
- CN202423163342.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing contact displacement sensors cannot work effectively in high-temperature environments. Material and structural limitations mean that their operating temperature is generally between -40℃ and +80℃, making them difficult to apply to high-temperature testing.
The design incorporates a ceramic measuring rod, a cooling rack, and cooling water pipes. The ceramic measuring rod is heat-resistant and transmits deformation to the room-temperature measurement area, while the cooling water pipes cool the electronic measuring unit to prevent damage.
It enables deformation measurement in high-temperature environments, reduces measurement errors, avoids damage to electronic components, and has a simple structure and low cost.
Smart Images
Figure CN223538275U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection equipment technology, specifically to a high-temperature contact displacement sensor. Background Technology
[0002] In high-temperature mechanical testing, measuring the deformation of the specimen is a necessary testing method and also a challenging aspect of high-temperature testing. Currently, commonly used high-temperature deformation measurement equipment is divided into contact and non-contact types. Due to the high cost, low accuracy, and poor measurement results of non-contact equipment, contact measurement equipment is usually considered, using contact displacement sensors to measure the specimen's deformation. Contact displacement sensors need to be inserted into the high-temperature environment to contact the specimen during measurement. Conventional contact displacement sensors, due to limitations in materials and structure, generally have an operating temperature range of -40℃ to +80℃, making them difficult to apply in high-temperature testing. Utility Model Content
[0003] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a high-temperature contact displacement sensor that can be used for measurement work at high temperatures, and has a simple structure and is easy to use.
[0004] To achieve the above objectives, this utility model provides a high-temperature contact displacement sensor, including a housing and an electronic measuring unit disposed within the housing, as well as a ceramic measuring rod, a cooling rack, and a cooling water pipe. The front end of the electronic measuring unit is connected to the rear end of the ceramic measuring rod, enabling it to measure the axial displacement of the ceramic measuring rod. The cooling rack is fixedly connected to the housing and includes a connecting baffle, an inner sleeve, and an outer sleeve. The inner sleeve is fitted onto the housing, and the outer sleeve is fitted outside the inner sleeve, forming a cooling cavity between the outer sleeve and the inner sleeve. The front ends of the inner sleeve and the outer sleeve are fixedly connected to the connecting baffle, which seals the cooling cavity. The cooling water pipe is disposed within the cooling cavity and contacts the inner sleeve.
[0005] Furthermore, the inner sleeve and the outer shell are fitted with a clearance.
[0006] Furthermore, the front end face of the connecting baffle is flush with the front end face of the outer shell.
[0007] Furthermore, the material of the cooling rack includes, but is not limited to, stainless steel.
[0008] Furthermore, the cooling water pipe is spirally wound multiple times on the inner sleeve.
[0009] Furthermore, it also includes a protective sleeve that is fitted over the outside of the ceramic measuring rod. The protective sleeve is fixedly connected to the outer shell, and the front end of the ceramic measuring rod extends out of the protective sleeve.
[0010] Furthermore, the outer surface of the ceramic measuring rod is in contact with the inner wall of the protective sleeve.
[0011] Furthermore, the material of the protective sleeve includes, but is not limited to, high-temperature alloys.
[0012] Furthermore, the ceramic measuring rod is made of ceramic material, including but not limited to zirconia ceramic or alumina ceramic.
[0013] Furthermore, the electronic measuring unit includes a coil and an iron core disposed in the coil, with a connecting block fixedly connected to the front end of the iron core and the rear end of the ceramic measuring rod fixedly connected to the connecting block.
[0014] As described above, the high-temperature contact displacement sensor of this utility model has the following beneficial effects:
[0015] By incorporating a ceramic measuring rod, cooling rack, and cooling water pipes, the ceramic measuring rod is immersed in a high-temperature environment during use, while the electronic measuring unit and other components remain at room temperature. The ceramic measuring rod transfers deformation from the high-temperature region to the room-temperature region for measurement. The ceramic measuring rod can withstand temperatures exceeding 1000 degrees Celsius, and the low coefficient of thermal expansion of ceramic materials effectively reduces measurement errors. During measurement, flowing cooling water through the cooling water pipes effectively cools the electronic measuring unit, preventing damage due to high temperatures. The entire device has a simple structure, is easy to use, and can be improved from existing contact displacement sensors, resulting in low cost. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the contact displacement sensor in this utility model.
[0017] Explanation of icon numbers
[0018] 1. Ceramic measuring rod
[0019] 2. Protective sleeve
[0020] 3. Outer shell
[0021] 4. Signal output connector
[0022] 5 Connecting Blocks
[0023] 6 Cooling rack
[0024] 61 Inner Sleeve
[0025] 62 Outerwear
[0026] 63 Connecting baffle
[0027] 7 Cooling water pipes Detailed Implementation
[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0029] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0030] See Figure 1 This utility model provides a high-temperature contact displacement sensor, including a housing 3 and an electronic measuring part disposed within the housing 3, as well as a ceramic measuring rod 1, a cooling rack 6, and a cooling water pipe 7. The front end of the electronic measuring part is connected to the rear end of the ceramic measuring rod 1 and is capable of measuring the axial displacement of the ceramic measuring rod 1. The cooling rack 6 is fixedly connected to the housing 3 and includes a connecting baffle 63, an inner sleeve 61, and an outer sleeve 62. The inner sleeve 61 is fitted onto the housing 3, and the outer sleeve 62 is fitted onto the outside of the inner sleeve 61, forming a cooling cavity between the outer sleeve 62 and the inner sleeve. The front ends (the ends facing the ceramic measuring rod 1) of the inner sleeve 61 and the outer sleeve 62 are fixedly connected to the connecting baffle 63, and the connecting baffle 63 seals the cooling cavity. The cooling water pipe 7 is disposed in the cooling cavity and contacts the inner sleeve 61.
[0031] This utility model relates to a high-temperature contact displacement sensor, which can be used to monitor objects inside a high-temperature furnace, including deformation detection and object displacement detection. In use, the front end of the ceramic measuring rod 1 extends into the high-temperature furnace and contacts the object to be measured, while the electronic measuring unit, housing 3, cooling rack 6, and cooling water pipe 7 are located outside the high-temperature furnace. The ceramic measuring rod 1 transmits the deformation within the high-temperature region to the room-temperature region for measurement. Because the ceramic measuring rod 1 is made of high-temperature resistant ceramic material, it can withstand temperatures of over 1000 degrees Celsius, and the low coefficient of thermal expansion of ceramic material effectively reduces measurement errors. The electronic measuring unit is housed within the housing 3 and protected by it. During measurement, flowing cooling water is introduced into the cooling water pipe 7, effectively cooling the electronic measuring unit through heat transfer between the inner sleeve 61 and the housing 3, preventing damage due to temperature rise. Furthermore, because the connecting baffle 63 faces the high-temperature furnace side and seals the cooling cavity, it reduces the direct entry of hot air into the cooling cavity during measurement, thus minimizing the impact on cooling efficiency. The connecting baffle 63 and the outer sleeve 62 can protect the cooling water pipe 7, and the rear end of the cooling housing can be set to be open for the installation of the cooling water pipe 7.
[0032] In this embodiment, see Figure 1 As a preferred design, both the inner sleeve 61 and the outer shell 3 are cylindrical, with the inner diameter of the inner sleeve 61 slightly larger than the outer diameter of the outer shell 3. This allows for a clearance fit between the inner sleeve 61 and the outer shell 3, resulting in minimal contact or gap between them, ensuring good heat conduction and facilitating installation. Other shapes are also acceptable for the inner sleeve 61 and the outer shell 3. Since the temperature near the front end of the outer shell 3 is higher during use, preferably, the front end face of the connecting baffle 63 is flush with the front end face of the outer shell 3, enabling better cooling of the side portion of the outer shell 3. The position of the rear end of the cooling rack 6 on the outer shell 3 can be set according to actual needs; it can be located in the middle of the outer shell 3 or near the rear end. The cooling rack 6 is preferably made of stainless steel, which can withstand high temperatures and has good heat conduction capabilities.
[0033] In this embodiment, see Figure 1 As a preferred design, the cooling water pipe 7 is spirally wound multiple times on the inner sleeve 61 to achieve a better cooling effect. The outer sleeve is provided with connection inlets and outlets for connecting to both ends of the cooling water pipe 7. In use, the water pipe of the external water source can be connected to the connection inlets and outlets on the outer sleeve, which is convenient.
[0034] In this embodiment, see Figure 1As a preferred design, it also includes a protective sleeve 2 fitted over the outside of the ceramic measuring rod 1. The protective sleeve 2 is fixedly connected to the outer shell 3, and the front end of the ceramic measuring rod 1 extends out of the protective sleeve 2. The protective sleeve 2 is preferably made of a high-temperature alloy, which can withstand high temperatures while maintaining good structural strength. The protective sleeve 2 can protect the ceramic measuring rod 1. Furthermore, the outer surface of the ceramic measuring rod 1 is fitted against the inner wall of the protective sleeve 2, and the protective sleeve 2 also serves as a guide to ensure that the ceramic measuring rod 1 moves stably along its axial direction.
[0035] In this embodiment, see Figure 1 As a preferred design, the ceramic measuring rod 1 can be made of zirconia ceramic or alumina ceramic, which have the advantages of high strength and low coefficient of expansion. The front end of the ceramic measuring rod 1 is preferably cylindrical to facilitate contact with the object being measured.
[0036] In this embodiment, see Figure 1 As a preferred design, the electronic measuring unit includes a coil (not shown in the attached drawings), an iron core (not shown in the attached drawings) disposed in the coil, and related potential elements. A connecting block 5 is fixedly connected to the front end of the iron core, and the rear end of the ceramic measuring rod 1 is fixedly connected to the connecting block 5, preferably using a detachable connection such as a threaded connection, to facilitate the installation and replacement of the ceramic measuring rod 1. The connecting block 5 and the iron core can also be detachably fixed for easy disassembly and assembly; the connecting block 5 and the iron core can also be integrally manufactured. The rear end of the electronic measuring unit has a signal output connector 4 for communication with devices such as digital display instruments, data acquisition instruments, microcontrollers, PLC controllers, or PCs. In use, when the ceramic measuring rod 1 moves axially, causing a displacement change in the iron core, the coil outputs an electrical signal. The potential element converts the coil signal into corresponding analog or digital voltage and current signals, which are then output through the signal output connector 4 to devices such as digital display instruments, data acquisition instruments, microcontrollers, PLC controllers, or PCs to achieve displacement measurement and control. In other embodiments, the electronic measuring unit can also adopt other suitable structures.
[0037] As can be seen from the above, the high-temperature contact displacement sensor involved in this utility model has the following beneficial effects:
[0038] By setting up a ceramic measuring rod 1, a cooling rack 6, and a cooling water pipe 7, the ceramic measuring rod 1 is inserted into a high-temperature environment during use, while the electronic measuring unit and other parts can remain in a normal temperature environment. The ceramic measuring rod 1 transfers the deformation in the high-temperature region to the normal temperature region for measurement. The ceramic measuring rod 1 can withstand temperatures of thousands of degrees Celsius, and the low coefficient of thermal expansion of ceramic materials can effectively reduce measurement errors. During measurement, flowing cooling water is introduced into the cooling water pipe 7 to effectively cool the electronic measuring unit and prevent damage to the electronic measuring unit due to high temperatures. The entire device has a simple structure, is easy to use, and can be improved from existing contact displacement sensors, resulting in low cost.
[0039] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0040] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A high-temperature contact displacement sensor, comprising a housing (3) and an electronic measuring unit disposed within the housing (3), characterized in that: It also includes a ceramic measuring rod (1), a cooling rack (6) and a cooling water pipe (7). The front end of the electronic measuring unit is connected to the rear end of the ceramic measuring rod (1) and can measure the axial displacement of the ceramic measuring rod (1). The cooling rack (6) is fixedly connected to the outer shell (3) and includes a connecting baffle (63), an inner sleeve (61) and an outer sleeve (62). The inner sleeve (61) is fitted on the outer shell (3), and the outer sleeve (62) is fitted on the outside of the inner sleeve (61) and forms a cooling cavity between the outer sleeve (62) and the inner sleeve. The front ends of the inner sleeve (61) and the outer sleeve (62) are fixedly connected to the connecting baffle (63), and the connecting baffle (63) blocks the cooling cavity. The cooling water pipe (7) is set in the cooling cavity and contacts the inner sleeve (61).
2. The high-temperature contact displacement sensor according to claim 1, characterized in that: The inner sleeve (61) is fitted with the outer shell (3) with a clearance.
3. The high-temperature contact displacement sensor according to claim 1, characterized in that: The front end face of the connecting baffle (63) is flush with the front end face of the outer shell (3).
4. The high-temperature contact displacement sensor according to claim 1, characterized in that: The material of the cooling rack (6) includes, but is not limited to, stainless steel.
5. The high-temperature contact displacement sensor according to claim 1, characterized in that: The cooling water pipe (7) is spirally wound multiple times on the inner sleeve (61).
6. The high-temperature contact displacement sensor according to claim 1, characterized in that: It also includes a protective sleeve (2) that is fitted over the outside of the ceramic measuring rod (1), the protective sleeve being fixedly connected to the outer shell (3), and the front end of the ceramic measuring rod (1) extending out of the protective sleeve (2).
7. The high-temperature contact displacement sensor according to claim 6, characterized in that: The outer side of the ceramic measuring rod (1) is in contact with the inner wall of the protective sleeve (2).
8. The high-temperature contact displacement sensor according to claim 6, characterized in that: The protective sleeve (2) is made of materials including but not limited to high-temperature alloys.
9. The high-temperature contact displacement sensor according to claim 1, characterized in that: The ceramic measuring rod (1) is made of ceramic material, including but not limited to zirconia ceramic or alumina ceramic.
10. The high-temperature contact displacement sensor according to claim 1, characterized in that: The electronic measuring unit includes a coil and an iron core disposed in the coil. A connecting block (5) is fixedly connected to the front end of the iron core, and the rear end of the ceramic measuring rod (1) is fixedly connected to the connecting block (5).