Wear-resistant thermal resistor convenient to replace
By installing the adjustable aperture mounting barrel and airbag drive piece on the protective sleeve of the thermal resistance, the existing thermal resistance is solved by difficulty in replacing and low adaptability, and a wear-resistant thermal resistance with convenient replacement, wide adaptation range and low cost is achieved.
Patent Information
- Application Number
- CN202421641124.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The protective sleeves and flanges of existing thermal resistance are welded and fixed, which leads to difficulty in replacement and increases production costs and waste. At the same time, the different pore sizes of the flanges lead to low adaptability.
A wear-resistant thermal resistor is designed for easy replacement. By installing a mounting cylinder with gradually increasing apertures from bottom to top on the protective sleeve, flanges of different aperture sizes can be spirally matched with the protective sleeve, and sealing and fixing the flange and the protective sleeve through the airbag and the driving member.
It improves the adaptability range of thermal resistance, facilitates replacement, reduces production costs and waste, and enhances sealing and safety.
Smart Images
Figure CN222882166U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal resistors, in particular to a wear-resistant thermal resistor which is convenient to replace. Background Art
[0002] Thermistors are the most commonly used temperature detectors in medium and low temperature zones. Thermistor temperature measurement is based on the property that the resistance value of a metal conductor increases with the increase of temperature. Its main features are high measurement accuracy and stable performance. Among them, platinum thermistors have the highest measurement accuracy. They are not only widely used in industrial temperature measurement, but also made into standard reference instruments. Thermistors are mostly made of pure metal materials. Currently, platinum and copper are the most commonly used. In addition, materials such as nickel, manganese and rhodium are now being used to manufacture thermistors. There are many types of temperature sensing materials commonly used for metal thermistors, and the most commonly used is platinum wire. Installing a protective cover on the outside of the thermistor can effectively enhance the overall wear resistance and impact resistance of the thermistor, and a flange is usually installed on the outside of the protective cover to provide additional protection, enhance safety and sealing;
[0003] However, the existing protective sleeve and flange are generally fixed by welding. When the protective sleeve needs to be replaced, the welding between the protective sleeve and the flange cannot be separated, so the protective sleeve and the flange need to be replaced at the same time, resulting in increased production costs and waste. In addition, the apertures of the flanges are different, and the selection of the protective sleeve also needs to consider different flange sizes, which is more troublesome and has low adaptability. In view of this, we propose a wear-resistant thermal resistor that is easy to replace. Utility Model Content
[0004] The utility model aims to provide a wear-resistant thermal resistor which is easy to replace, so as to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides a wear-resistant thermal resistor that is easy to replace, including a protective sleeve, a connecting box is movably connected to the end of the protective sleeve, a mounting tube is arranged on the outer wall of the protective sleeve, the aperture of the mounting tube gradually increases from bottom to top, a thread is arranged on the outer wall of the mounting tube, a flange is matched with the thread on the outer surface of the mounting tube, a plurality of grooves are opened on the outer surface of the mounting tube, an airbag is arranged inside the groove, wherein: the grooves are evenly distributed on the outer surface of the mounting tube, a plurality of support plates are installed on the upper surface of the mounting tube, wherein: the support plates correspond to the positions of the grooves, a driving member is installed on the surface of the support plate, wherein: the airbag is sealed to the flange through the driving member.
[0006] As a further improvement of the present technical solution, the driving member includes a piston cylinder, which is fixedly connected to the upper surface of the support plate, a push plate is arranged inside the piston cylinder, a push rod is fixedly connected to the lower surface of the push plate, the bottom end of the push rod passes through the support plate, the bottom end of the push rod is fixedly connected to a push block, and an elastic spring is arranged on the side of the push rod shaft, wherein: the top and bottom ends of the elastic spring are respectively connected to the lower surface of the support plate and the upper surface of the push block.
[0007] As a further improvement of the technical solution, a catheter is installed on the upper surface of the piston cylinder, and the end of the catheter is connected to the airbag.
[0008] As a further improvement of the technical solution, a shielding wire is arranged inside the protective sleeve, an insulating sleeve is installed on the lower surface of the shielding wire, and a measuring head is arranged at the bottom end of the insulating sleeve.
[0009] As a further improvement of the technical solution, four grooves and four support plates are evenly arranged in an annular shape.
[0010] As a further improvement of the technical solution, a partial surface of the outer wall of the airbag is connected to the inner side wall of the groove.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] In the wear-resistant thermal resistor which is easy to replace, a mounting cylinder with a gradually increasing aperture from bottom to top is mounted on the protective sleeve, so that flanges with different apertures can be screwed together with the protective sleeve, thereby greatly improving its adaptability. During the process of screwing the flange on the protective sleeve, the push block can be pushed so that the push rod drives the push plate to squeeze upward inside the piston cylinder to generate gas, which enters the airbag through the catheter to expand it, fills the gap between the flange and the protective sleeve, and is further sealed and fixed. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 It is a schematic cutaway diagram of the overall structure of the utility model;
[0015] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure in.
[0016] The meaning of each number in the figure is:
[0017] 1. Protective sleeve; 10. Connecting box; 11. Mounting tube; 111. Flange; 112. Airbag; 113. Support plate; 2. Driving member; 20. Piston cylinder; 201. Push plate; 202. Push rod; 203. Push block; 204. Elastic spring; 205. Conduit; 12. Shielding wire; 121. Insulating sleeve; 122. Measuring head. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] Thermal resistors are the most commonly used temperature detectors in the medium and low temperature zones. Thermal resistor temperature measurement is based on the property that the resistance value of a metal conductor increases with the increase of temperature. Its main features are high measurement accuracy and stable performance. Among them, platinum thermal resistors have the highest measurement accuracy. They are not only widely used in industrial temperature measurement, but also made into standard reference instruments. Thermal resistors are mostly made of pure metal materials. Currently, platinum and copper are the most widely used. In addition, materials such as nickel, manganese and rhodium have begun to be used to manufacture thermal resistors. There are many types of temperature sensing materials commonly used for metal thermal resistors, and the most commonly used is platinum wire. Installing a protective cover on the outside of the thermal resistor can effectively enhance the overall wear resistance and impact resistance of the thermal resistor, and a flange is usually installed on the outside of the protective cover to provide additional protection, enhance safety and sealing.
[0020] See also Figure 1-Figure 3As shown, this embodiment provides a wear-resistant thermal resistor that is easy to replace, including a protective sleeve 1, and a connection box 10 is movably connected to the end of the protective sleeve 1. Considering that the existing protective sleeve and the flange 111 are generally fixed by welding, when the protective sleeve needs to be replaced, since the welding between the protective sleeve and the flange 111 cannot be separated, the protective sleeve and the flange 111 need to be replaced at the same time, resulting in an increase and waste in production costs. In addition, the apertures of the flange 111 are different, and the selection of the protective sleeve also needs to consider different sizes of the flange 111, which is more troublesome and has low adaptability. Therefore, the specific details are as follows: A mounting tube 11 is arranged on the outer wall of the tube 1, and the aperture of the mounting tube 11 gradually increases from bottom to top. A thread is arranged on the outer wall of the mounting tube 11, and a flange 111 is matched with the thread on the outer surface of the mounting tube 11. A plurality of grooves are opened on the outer surface of the mounting tube 11, and an air bag 112 is arranged inside the groove, wherein: the grooves are evenly distributed on the outer surface of the mounting tube 11, and a plurality of support plates 113 are installed on the upper surface of the mounting tube 11, wherein: the support plates 113 correspond to the positions of the grooves, and a driving member 2 is installed on the surface of the support plate 113, wherein: the air bag 112 is sealed to the flange 111 through the driving member 2.
[0021] The improvement of this embodiment is that:
[0022] By installing a mounting tube 11 with a gradually increasing aperture from bottom to top on the protective sleeve 1, flanges 111 with different aperture sizes can be screwed together with the protective sleeve, greatly improving its adaptability. During the screw installation of the flange 111 on the protective sleeve, the driving member 2 allows gas to enter the airbag 112 to expand it, filling the gap between the flange 111 and the protective sleeve, so that it is further sealed and fixed.
[0023] Considering that a gap may be generated during the installation of the protective sleeve 1 and the flange 111, the driving member 2 includes a piston cylinder 20, which is fixedly connected to the upper surface of the support plate 113, a push plate 201 is arranged inside the piston cylinder 20, a push rod 202 is fixedly connected to the lower surface of the push plate 201, the bottom end of the push rod 202 passes through the support plate 113, a push block 203 is fixedly connected to the bottom end of the push rod 202, and an elastic spring 204 is arranged on the side of the push rod 202 shaft, wherein: the top and bottom ends of the elastic spring 204 are respectively The push block 203 is pushed so that the push rod 202 drives the push plate 201 to be squeezed upward inside the piston cylinder 20 to generate gas, which enters the air bag 112 through the conduit 205 to expand it, and fills the gap between the flange 111 and the protective sleeve, so that it is further sealed and fixed. On the contrary, when the flange 111 is disassembled and separated from the protective sleeve 1, the elastic recovery of the elastic spring 204 can make the push rod 202 drive the push plate 201 to move downward.
[0024] In order to fill the gap between the flange 111 and the protective tube sleeve, a guide tube 205 is installed on the upper surface of the piston cylinder 20. The end of the guide tube 205 is connected to the airbag 112. The airbag 112 is inflated to fill the gap between the flange 111 and the protective tube sleeve.
[0025] In order to enable the thermistor to measure temperature, a shielding wire 12 is arranged inside the protective sleeve 1, an insulating sleeve 121 is installed on the lower surface of the shielding wire 12, and a measuring head 122 is arranged at the bottom of the insulating sleeve 121. The shielding wire 12 reduces the influence of external electromagnetic interference on the thermistor signal. The insulating sleeve 121 provides a physical protection layer for the thermistor to prevent the thermistor from mechanical damage or damage caused by external environmental conditions. The measuring head 122 directly contacts the measured medium for measurement.
[0026] Secondly, four grooves and support plates 113 are evenly arranged in an annular shape, so that the driving member 2 and the airbag 112 are evenly distributed to fill the gap between the protective sleeve and the flange 111.
[0027] In order to prevent the airbag 112 from being separated from the groove, a partial surface of the outer wall of the airbag 112 is connected to the inner side wall of the groove.
[0028] When the wear-resistant thermal resistor that is easy to replace is used in practice, the user installs it by spirally rotating the flange 111 on the protective tube sleeve. During the upward rotation, the push block 203 is pushed so that the push rod 202 drives the push plate 201 to squeeze upward inside the piston cylinder 20 to generate gas, which enters the air bag 112 through the conduit 205 to expand it and fill the gap between the flange 111 and the protective tube sleeve, so that it is further sealed and fixed. On the contrary, when the flange 111 or the protective sleeve 1 needs to be replaced and disassembled, the flange 111 can be detached by rotating it in the opposite direction. During the detachment, the elastic recovery of the elastic spring 204 can make the push rod 202 drive the push plate 201 to move downward, so as to prepare for the next installation of the flange 111. The user can directly contact the measured medium through the measuring head 122 to perform measurement.
[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A wear-resistant thermal resistor that is easy to replace, comprising a protective sleeve (1), characterized in that: The end of the protective sleeve (1) is movably connected to a connection box (10), the outer wall of the protective sleeve (1) is provided with a mounting tube (11), the aperture of the mounting tube (11) gradually increases from bottom to top, the outer wall of the mounting tube (11) is provided with a thread, the outer surface of the mounting tube (11) is threaded with a flange (111), the outer surface of the mounting tube (11) is provided with a plurality of grooves, and air bags (112) are provided inside the grooves, wherein: the grooves are evenly distributed on the outer surface of the mounting tube (11), and the upper surface of the mounting tube (11) is provided with a plurality of support plates (113), wherein: the support plates (113) correspond to the positions of the grooves, and a driving member (2) is installed on the surface of the support plate (113), wherein: the driving member (2) enables the air bag (112) to seal the flange (111).
2. The easily replaceable wear-resistant thermal resistor according to claim 1, characterized in that: The driving member (2) comprises a piston cylinder (20), the piston cylinder (20) being fixedly connected to the upper surface of the support plate (113), a push plate (201) being arranged inside the piston cylinder (20), a push rod (202) being fixedly connected to the lower surface of the push plate (201), the bottom end of the push rod (202) passing through the support plate (113), a push block (203) being fixedly connected to the bottom end of the push rod (202), and an elastic spring (204) being arranged on the side surface of the axis of the push rod (202), wherein the top and bottom ends of the elastic spring (204) are respectively connected to the lower surface of the support plate (113) and the upper surface of the push block (203).
3. The easily replaceable wear-resistant thermal resistor according to claim 2, characterized in that: A catheter (205) is installed on the upper surface of the piston cylinder (20), and the end of the catheter (205) is connected to the airbag (112).
4. The easily replaceable wear-resistant thermal resistor according to claim 1, characterized in that: A shielding wire (12) is arranged inside the protective sleeve (1), an insulating sleeve (121) is installed on the lower surface of the shielding wire (12), and a measuring head (122) is arranged at the bottom end of the insulating sleeve (121).
5. The easily replaceable wear-resistant thermal resistor according to claim 1, characterized in that: The grooves and the support plate (113) are both evenly arranged in a ring shape with four grooves.
6. The easily replaceable wear-resistant thermal resistor according to claim 1, characterized in that: A partial surface of the outer wall of the air bag (112) is connected to the inner side wall of the groove.