Elastic top adjustable sealed thermal resistor
By using an O-ring in the installation structure of the thermocouple to seal the cavity between the sliding part and the sliding sleeve, the problem of oil seepage or oil leakage when the thermocouple is installed at the outlet of the coal mill is solved, and the prevention of coal contamination is achieved. powder effect.
Patent Information
- Application Number
- CN202420340590.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-23
AI Technical Summary
Existing thermocouples are prone to oil leakage or oil leakage during the installation process of the coal mill outlet, resulting in contamination of coal powder.
A spring-top adjustable sealed thermal resistor is designed, which uses an O-ring seal to seal the cavity between the sliding part and the sliding sleeve to prevent lubricating oil leakage.
It effectively avoids the leakage of lubricating oil during the use of the thermocouple, prevents contamination of pulverized coal, and ensures accurate monitoring of the coal mill outlet temperature.
Smart Images
Figure CN222379210U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal resistors, and more specifically to a thermal resistor utilizing a spring-top adjustable sealing structure. Background Art
[0002] When the coal mill is working, its outlet temperature needs to be controlled. The control principle follows the safety principle. Its main purpose is: in order to prevent coal powder from exploding, the outlet temperature of the coal mill must be strictly controlled not to exceed the specified safety value; for anthracite, although there is no explosion hazard, spontaneous combustion may occur at high temperatures. Therefore, the actual design will control the outlet temperature of the coal mill not to exceed 150°C. In order to facilitate the staff to monitor the temperature at the outlet of the coal mill in real time, it is necessary to set a thermal resistor at the outlet of the coal mill to monitor the temperature. At present, in order to smoothly install the thermal resistor at the outlet of the coal mill, lubricating oil will be applied to the installation structure. However, the use of lubricating oil will cause the thermocouple installed here to seep or leak during use. In order to avoid oil seepage or oil leakage to contaminate the coal powder at the outlet of the coal mill, it is necessary to design a thermocouple that avoids oil seepage or oil leakage. Utility Model Content
[0003] The utility model overcomes the shortcomings of the prior art and provides a spring-top adjustable sealed thermal resistor.
[0004] The technical purpose of the utility model is achieved through the following technical solutions.
[0005] The spring-top adjustable sealed thermal resistor comprises a junction box, a spring-top adjustable sealing structure, a protection tube and a temperature measuring core. The junction box is arranged at the head end of the protection tube, the spring-top adjustable sealing structure is arranged outside the protection tube, and the temperature measuring core is arranged inside the protection tube and connected to the junction box.
[0006] The spring-top adjustable sealing structure comprises a mounting nut, a sleeve, a positioning nut, a retaining spring, a sliding part, a spring and a positioning nut, wherein: the sleeve is arranged on a protective tube, a boss is arranged on the outer wall of the sleeve, an external thread is formed on the outer wall of the sleeve above the boss, the mounting nut is threadedly connected to the head end of the sleeve, the retaining spring is arranged on the middle outer wall of the sleeve, the retaining spring adopts a tubular structure with an L-shaped cross section, the retaining spring comprises a clamping part and a mounting part, the positioning nut is arranged on the mounting part, the clamping part is located on the outer side of the head end of the positioning nut, the head end of the sliding part extends into the tail end of the positioning nut and is connected to the positioning nut, an O-ring is arranged in a cavity formed between the inner wall of the sliding part and the outer wall of the sleeve, which is used to seal the sliding part and the sleeve to prevent liquid materials from leaking therefrom, the tail end of the sliding part is connected to the tail end of the sleeve through the positioning nut, and a spring is installed in a cavity formed between the inner wall of the tail end of the sliding part and the outer wall of the sleeve and between the fixing nut and the outer wall of the sleeve, which is used to reset the positioning nut and the sliding part.
[0007] In the above technical solution, the number of the O-rings is 2-4, preferably 3, and the O-rings are arranged along the longitudinal direction of the sleeve.
[0008] In the above technical solution, sealing rings are installed between the outer wall of the top end of the sleeve and the inner wall of the mounting nut, and between the inner wall of the positioning nut and the outer wall of the top end of the sliding member.
[0009] In the above technical solution, a clamping nut is provided at the connection point between the junction box and the protective tube.
[0010] In the above technical solution, a temperature signal transmission interface is provided on one side of the junction box.
[0011] Compared with the prior art, the technical solution of the utility model utilizes an O-ring to seal the cavity between the inner wall of the sliding member and the outer wall of the sleeve to prevent liquids such as lubricating oil and oily substances from leaking from the cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a side sectional structural schematic diagram of the utility model;
[0013] In the figure: 1 is a mounting nut, 2 is a sliding sleeve, 3 is a positioning nut, 4 is a retaining ring, 5 is a sliding part, 6 is a spring, 7 is a fixing nut, 8 is an O-ring, 9 is a sealing ring, 10 is a junction box, 11 is a protective tube, 12 is a clamping nut, and 13 is a temperature signal transmission interface.
[0014] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION
[0015] The technical solution of the utility model is further described below through specific embodiments.
[0016] like Figure 1 As shown, the spring-top adjustable sealed thermal resistor includes a junction box 10, a spring-top adjustable sealing structure, a protection tube 11 and a temperature measuring core. The junction box 10 is arranged at one end of the protection tube 11, the spring-top adjustable sealing structure is arranged outside the protection tube 11, and the temperature measuring core is arranged inside the protection tube 11 and connected to the junction box 10; from the length direction of the thermocouple, the end of the protection tube connected to the junction box is the head end or the upper end (i.e., the top), and as far as the sliding sleeve 2, the sliding member 5, and the positioning nut 3 are concerned, the end close to the junction box is its head end or the upper end, and the end away from the junction box is its tail end or the lower end.
[0017] The spring-top adjustable sealing structure comprises a mounting nut 1, a sleeve 2, a positioning nut 3, a retaining spring 4, a sliding member 5, a spring 6 and a positioning nut 7, wherein: the sleeve 2 is arranged on a protective tube 11, a boss is arranged on the outer wall of the sleeve 2, an external thread is formed on the outer wall of the sleeve 2 above the boss, the mounting nut 1 is threadedly connected with the first end of the sleeve 2, the retaining spring 4 is arranged on the middle outer wall of the sleeve 2, the retaining spring 4 adopts a tubular structure with an L-shaped cross section, the retaining spring 4 comprises a clamping portion and a mounting portion, the positioning nut 3 is arranged on the mounting portion, and the clamping portion is located at On the outside of the front end of the positioning nut 3, the front end of the sliding member 5 extends into the rear end of the positioning nut 3 and is connected to the positioning nut 3. An O-ring 8 is arranged in the cavity formed between the inner wall of the sliding member 5 and the outer wall of the sleeve 2, which is used to seal the sliding member 5 and the sleeve 2 to prevent liquid material from leaking therefrom. The rear end of the sliding member 5 is connected to the rear end of the sleeve 2 through the positioning nut 7. A spring 6 is installed in the cavity formed between the inner wall of the rear end of the sliding member 5 and the outer wall of the sleeve 2 and between the fixing nut 7 and the outer wall of the sleeve 2, which is used to reset the positioning nut 3 and the sliding member 5.
[0018] Sealing rings 9 are installed between the outer wall of the top end of the sliding sleeve 2 and the inner wall of the mounting nut 1 , and between the inner wall of the positioning nut 1 and the outer wall of the top end of the sliding member 5 .
[0019] The number of O-rings 8 is three, and the O-rings 8 are arranged along the longitudinal direction of the sliding sleeve 2 .
[0020] A clamping nut 12 is provided at the connection point between the junction box 10 and the protection tube 11 for protecting the structure at the connection point between the junction box 10 and the protection tube 11 .
[0021] A temperature signal transmission interface 13 is provided on one side of the junction box 10 for transmitting the temperature value obtained by the junction box 10 to the display system.
[0022] The temperature measuring core adopts an armored thermocouple, such as a single-point armored thermocouple or a single-point multi-point armored thermocouple, such as a single-point two-point.
[0023] When in use, first install the sliding sleeve 2 on the protection tube 11, then use the installation nut 1 to fix the sliding sleeve 2 outside the protection tube 11, then install the retaining ring 4 on the sliding sleeve 2, and install the positioning nut 3 on the retaining ring, then, extend the sliding sleeve 2 and the protection tube 11 located below the positioning nut 3 into the outlet of the coal mill, and ensure that the temperature measuring core is extended to the temperature measuring position, finally, install the head end of the sliding member 5 in the tail end of the positioning nut 3, and use an O-ring to seal the cavity between the sliding member and the positioning nut to prevent lubricating oil, oily substances and other liquids from seeping out from here, and install the spring 6 and the fixing nut 7 on the sliding member 5 in turn, so that the positioning nut 3 and the sliding member 5 can slide relative to each other, and use the gap between the positioning nut 3 and the sliding member 5 to clamp the thermocouple on the side wall of the coal mill outlet. This structure enables the thermal resistor to be installed at the outlet of the coal mill with different wall thicknesses, thereby expanding its scope of application.
[0024] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. Moreover, relational terms such as "first" and "second" are only used to distinguish one from another component with the same name, and do not necessarily require or imply that there is any such actual relationship or order between these components.
[0025] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be done by those skilled in the art without expending creative labor falls within the protection scope of the present invention.
Claims
1. Spring-top adjustable sealed thermal resistor, characterized in that: It includes a junction box, a spring-top adjustable sealing structure, a protection tube and a temperature measuring core body. The junction box is arranged at the head end of the protection tube, the spring-top adjustable sealing structure is arranged outside the protection tube, and the temperature measuring core body is arranged inside the protection tube and connected to the junction box. The invention discloses a spring-top adjustable sealing structure, comprising a mounting nut, a sleeve, a positioning nut, a retaining spring, a sliding part, a spring and a positioning nut, wherein: the sleeve is arranged on a protective tube, a boss is arranged on the outer wall of the sleeve, an external thread is formed on the outer wall of the sleeve above the boss, the mounting nut is threadedly connected to the head end of the sleeve, the retaining spring is arranged on the middle outer wall of the sleeve, the retaining spring adopts a tubular structure with an L-shaped cross section, the retaining spring comprises a clamping part and a mounting part, the positioning nut is arranged on the mounting part, the clamping part is located on the outer side of the head end of the positioning nut, the head end of the sliding part extends into the tail end of the positioning nut and is connected to the positioning nut, an O-ring is arranged in a cavity formed between the inner wall of the sliding part and the outer wall of the sleeve, the tail end of the sliding part is connected to the tail end of the sleeve through the retaining nut, and a spring is installed in a cavity formed between the inner wall of the tail end of the sliding part and the outer wall of the sleeve and between the fixing nut and the outer wall of the sleeve.
2. The spring-top adjustable sealed thermal resistor according to claim 1, characterized in that: Sealing rings are installed between the outer wall of the top end of the sliding sleeve and the inner wall of the mounting nut, and between the inner wall of the positioning nut and the outer wall of the top end of the sliding member.
3. The spring-top adjustable sealed thermal resistor according to claim 1 or 2, characterized in that: The O-type sealing ring is arranged along the longitudinal direction of the sliding sleeve.
4. The spring-top adjustable sealed thermal resistor according to claim 1 or 2, characterized in that: The number of the O-rings is 2-4.
5. The spring-top adjustable sealed thermal resistor according to claim 3, characterized in that: The number of the O-rings is 2-4.
6. The spring-top adjustable sealed thermal resistor according to claim 1 or 2, characterized in that: A clamping nut is arranged at the connection point between the junction box and the protective tube.
7. The spring-top adjustable sealed thermal resistor according to claim 3, characterized in that: A clamping nut is arranged at the connection point between the junction box and the protective tube.
8. The spring-top adjustable sealed thermal resistor according to claim 4, characterized in that: A clamping nut is arranged at the connection point between the junction box and the protective tube.
9. The spring-top adjustable sealed thermal resistor according to claim 1 or 2, characterized in that: A temperature signal transmission interface is arranged on one side of the junction box.
10. The spring-top adjustable sealed thermal resistor according to claim 3, characterized in that: A temperature signal transmission interface is arranged on one side of the junction box.