A threaded connection high-pressure resistant temperature sensor structure and its manufacturing method

Abstract

The present invention provides a threaded high-pressure temperature sensor structure, comprising a housing body that is integrally bolted, the housing body comprising a screwing portion and a probe portion coaxially connected to the screwing portion, an installation passage for installing a temperature detection component being provided in the screwing portion and the probe portion, the screwing portion comprising a coaxially connected screwing section and a threaded section, the screwing section being polygonal in shape, the threaded section being located on the right side of the screwing section, the right end of the threaded section being fixedly connected to the probe portion, a groove being provided in the right end surface of the threaded section, the left end of the probe portion being fixedly connected to the bottom surface of the groove, the right end of the probe portion being located at the notch of the groove, and a gap being left between the probe portion and the sidewall of the groove. The threaded temperature sensor can be made very small and short in length while ensuring rapid temperature response.

Description

Technical Field

[0001] The present invention relates to sensor technology, and in particular to a threaded connection high-pressure resistant temperature sensor structure and a manufacturing method thereof. Background Art

[0002] Temperature sensors are widely used in aviation, automotive, industrial, medical and other industries, especially in industries involving personal safety and equipment safety control, where the response time requirements are increasingly faster.

[0003] Threaded connection is a widely used detachable fixed connection with advantages such as simple structure, reliable connection, and easy assembly and disassembly. Temperature sensors are often fixed with threaded connection.

[0004] In some high-pressure environments, the connection between the sensor probe and the housing needs to be able to withstand high pressure. The probe needs to be embedded in the housing, and the probe senses the temperature through heat conduction of the housing.

[0005] CN201720266940.4 A car temperature sensor housing and a car temperature sensor, comprising a housing body arranged in a bolt shape as a whole, the housing body comprising a screwing portion and a probe portion coaxially connected to the screwing portion, an installation channel for installing a temperature detection component being opened in the screwing portion and the probe portion along their axial connection, an internal thread being provided on the side wall of the installation channel near the channel opening.

[0006] Currently, there are two problems with existing threaded high-pressure temperature sensors:

[0007] 1. If Figure 1 As shown, the first probe 12 of the temperature sensor is long, and the wall thickness at the first thread 11 has little effect on the first probe 12. The temperature sensor has a fast response speed, but is large in size, which increases the reserved installation space on the equipment and has low space utilization.

[0008] 2. If Figure 2 As shown, the second probe 22 of the temperature sensor is short, and the length of the second probe 22 is less than the screwing length of the second thread 21 on the temperature sensor. Since the wall thickness at the second thread 21 is thicker than the wall thickness of the second probe 21, the sensitivity of the sensor is reduced and the response time becomes longer.

[0009] Therefore, it is difficult for a temperature sensor with a threaded connection to have a short probe, a small space occupation, and a fast response time. Summary of the Invention

[0010] In response to the problems in the prior art, the present invention provides a threaded high-pressure resistant temperature sensor structure and a manufacturing method thereof, the purpose of which is to reduce the space occupied by the temperature sensor and speed up the response time of the temperature sensor.

[0011] A threaded high-pressure temperature sensor structure includes a shell body that is arranged in a bolt shape as a whole, the shell body includes a screwing portion and a probe portion coaxially connected to the screwing portion, and an installation channel for installing a temperature detection component is opened in the screwing portion and the probe portion along the axial connection between the two. The screwing portion includes a screwing section and a threaded section that are coaxially connected. The screwing section is arranged in a polygonal column shape, and the threaded section is located on the right side of the screwing section. The right end of the threaded section is fixedly connected to the probe portion, and is characterized in that a groove is opened in the right end face of the threaded section, the left end of the probe portion is fixedly connected to the bottom surface of the groove, the right end head of the probe portion is located at the notch of the groove, and a gap is left between the probe portion and the side wall of the groove.

[0012] The working principle of the present invention is as follows: the temperature sensor is fixedly installed on the equipment through a threaded section, the groove is connected to the space to be measured in the equipment, the medium in the space to be measured fills the groove, and the probe part transmits the temperature of the medium to the temperature detection component in the installation channel, thereby realizing temperature detection.

[0013] In order to increase the contact area between the probe part and the medium and ensure the structural strength of the threaded section, further: the bottom surface of the groove is close to the left end of the threaded section, thereby expanding the contact area between the probe part and the medium.

[0014] To facilitate processing, the groove is a cylindrical structure and is coaxially arranged with the threaded section, so that the gap between the probe part and the side wall of the groove is an annular structure, which is convenient for milling cutter processing.

[0015] To enhance the structural stability of the present invention, the temperature detection component further comprises a temperature sensor core, which is inserted into the mounting channel corresponding to the threaded segment and filled with aluminum oxide or magnesium oxide. Temperature is sensed by the temperature sensor core after passing through the sidewall of the threaded segment and the aluminum oxide or magnesium oxide.

[0016] In order to improve the pressure-bearing strength of the connection structure between the threaded section and the screwing section, further: the threaded section and the screwing section are integrally connected through a transition section, and the outer circumferential surface of the transition section is an inner arc structure.

[0017] Furthermore: the material of the shell body is stainless steel with strong corrosion resistance, or brass with good thermal conductivity.

[0018] A method for manufacturing a threaded high-pressure temperature sensor structure, comprising the following steps:

[0019] Step 1: Cut out the overall bolt-shaped shell body;

[0020] Step 2: Processing a screwing section, a transition section and a threaded section on the outside of the shell body;

[0021] Step 3: machining a mounting channel in the housing body;

[0022] Step 4: Mill a groove and a probe portion on the right end face of the threaded segment.

[0023] Further: adopting a Φ2 end mill to mill the groove.

[0024] Furthermore: when the shell body is made of corrosion-resistant stainless steel, the groove depth is less than 7 mm; when the shell body is made of brass with good thermal conductivity, the groove depth is less than 9 mm. If the groove depth is too deep, the end mill will easily break.

[0025] Beneficial effects of the present invention: 1. Short response time

[0026] The grooves on the shell body make the wall thickness of the probe part and the threaded section very thin (compared to the whole). When the temperature sensor is installed in the measured medium, the measured medium can immediately and completely contact the probe part, and the temperature detection component installed inside can respond quickly, thereby greatly shortening the response time of the sensor.

[0027] 2. Small size

[0028] The groove on the shell body allows the probe part to be made very short, even shorter than the length of the threaded section, within the probe part and the threaded section, thereby reducing the space occupied by the present invention on the device.

[0029] 3. Strong resistance to shock and vibration

[0030] The probe is set in the threaded section and the two are integrated into one. The processed temperature sensor is small in size, light in weight and has small inertia, so it can meet the impact of 70g acceleration and 5Hz to 500Hz vibration tests.

[0031] 4. Strong pressure resistance

[0032] By setting the probe in the threaded section and integrating the two into an integrated process, stronger pressure resistance requirements can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a long probe temperature sensor in the prior art;

[0034] Figure 2 It is a short probe temperature sensor in the prior art;

[0035] Figure 3 It is a structural schematic diagram of the invention.

[0036] In the figure, 11, first thread; 12, first probe; 21, second thread; 22, second probe; 3, screwing part; 31, screwing section; 32, transition section; 33, threaded section; 331, groove; 4, probe part; 41, temperature detection component; 5, installation channel. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below with reference to the accompanying drawings. The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. The terms such as left, center, right, top, and bottom in the examples of the present invention are merely relative concepts or are based on the normal use state of the product and should not be considered as restrictive.

[0038] A threaded connection high pressure resistant temperature sensor structure, such as Figure 3 As shown, it includes a shell body that is arranged in a bolt shape as a whole, the shell body includes a screwing part 3 and a probe part 4 coaxially connected to the screwing part, and an installation channel 5 for installing a temperature detection component 41 is provided in the screwing part 3 and the probe part 4 along the axial connection between the two. The screwing part 3 includes a screwing section 31 and a threaded section 33 that are coaxially connected. The screwing section 31 is arranged in a polygonal column shape, and the threaded section 33 is located on the right side of the screwing section 31. The right end of the threaded section 33 is fixedly connected to the probe part 4, and a groove 331 is provided in the right end surface of the threaded section 33. The left end of the probe part 4 is fixedly connected to the bottom surface of the groove 331. The right end head of the probe part 4 is located at the notch of the groove 331, and a gap is left between the probe part 4 and the side wall of the groove 331.

[0039] Among them, the bottom surface of the groove 331 is close to the left end of the threaded section 33, thereby expanding the contact area between the probe part 4 and the medium. The groove 331 is a cylindrical structure and is coaxially arranged with the threaded section 33. The gap between the probe part 4 and the side wall of the groove 311 is an annular structure, which is convenient for milling. The temperature detection component 41 includes a temperature sensing core of the temperature sensor, which is inserted into the installation channel 5 corresponding to the threaded section 33 and is filled with aluminum oxide or magnesium oxide in the installation channel 5. The threaded section 33 is integrated with the middle part of the right end face of the screwing section 31 through the transition section 32, and the outer circumferential surface of the transition section 32 is an inner arc structure. The material of the outer shell body is stainless steel with strong corrosion resistance, or brass with good thermal conductivity.

[0040] The working principle of the present invention is as follows: the temperature sensor is fixedly installed on the equipment through a threaded section, the groove is connected to the space to be measured in the equipment, the medium in the space to be measured fills the groove, and the probe part transmits the temperature of the medium to the temperature detection component in the installation channel, thereby realizing temperature detection.

[0041] A method for manufacturing a threaded high-pressure temperature sensor structure, comprising the following steps:

[0042] Step 1: Cut out the overall bolt-shaped shell body;

[0043] Step 2: Processing a screwing section 31, a transition section 32 and a threaded section 33 on the outside of the shell body;

[0044] Step 3: machining a mounting channel 5 in the housing body;

[0045] Step 4: Mill a groove 331 and a probe portion 4 on the right end surface of the threaded segment 33 .

[0046] The groove 331 is milled using a Φ2 end mill. When the shell body is made of corrosion-resistant stainless steel, the groove depth is less than 7 mm; when the shell body is made of brass with good thermal conductivity, the groove depth is less than 9 mm.

[0047] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A threaded connection high-pressure resistant temperature sensor structure, comprising a housing body arranged in an overall bolt-like shape, the housing body comprising a screwing portion and a probe portion coaxially connected to the screwing portion, an installation passage for installing a temperature detection component being opened along the axial communication between the screwing portion and the probe portion, the screwing portion comprising a coaxially connected screwing section and a threaded section, the screwing section being arranged in a polygonal column shape, the threaded section being located on the right side of the screwing section, and the right end of the threaded section being fixedly connected to the probe portion, characterized in that: A groove is provided in the right end surface of the threaded segment, the left end of the probe part is fixedly connected to the bottom surface of the groove, the right end head of the probe part is located at the notch of the groove, a gap is left between the probe part and the side wall of the groove, the groove is a cylindrical structure and is coaxially arranged with the threaded segment, the bottom surface of the groove is close to the left end of the threaded segment, and the probe part is shorter than the length of the threaded segment; the temperature detection component includes a temperature sensing core of the temperature sensor, and the temperature sensing core is inserted into the installation channel corresponding to the threaded segment.

2. The threaded connection high-pressure resistant temperature sensor structure according to claim 1, characterized in that: The mounting channel is filled with aluminum oxide or magnesium oxide.

3. The threaded connection high-pressure resistant temperature sensor structure according to claim 1, characterized in that: The threaded section and the screwing section are integrally connected via a transition section, and the outer circumferential surface of the transition section is an inner arc structure.

4. The threaded connection high-pressure resistant temperature sensor structure according to claim 1, characterized in that: The shell body is made of stainless steel or brass.

5. A method for manufacturing a threaded high-pressure temperature sensor structure, comprising the threaded high-pressure temperature sensor structure according to claim 1, characterized in that: The following steps are involved: Step 1: Cut out the overall bolt-shaped shell body; Step 2: Processing a screwing section and a threaded section on the outside of the shell body; Step 3: machining a mounting channel in the housing body; Step 4: Mill a groove and a probe portion on the right end face of the threaded segment.

6. The method for manufacturing a threaded high-pressure temperature sensor structure according to claim 5, characterized in that: The groove is milled using a Φ2 end mill.

7. The method for manufacturing a threaded high-pressure temperature sensor structure according to claim 6, characterized in that: When the shell body is made of stainless steel, the depth of the groove is less than 7 mm; when the shell body is made of brass, the depth of the groove is less than 9 mm.

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