Detachable thermal resistor wear-resistant protective device

Abstract

The utility model relates to the technical field of coal mill equipment, in particular to a detachable thermal resistor wear-resistant protective device. The device is composed of an external thread base and an internal thread base, the internal thread base is welded and fixed to an outlet pipeline of the coal mill, the external thread base is fixed to the internal thread base through threads, and a PT100 thermal resistor is inserted into the external thread base and fixed through a threaded sleeve; the front end of the threaded sleeve is provided with a rhombic steel pipe, the rear end of the threaded sleeve is provided with a sleeve nut, and the sleeve nut is provided with rhombic steel pipe acute angle corresponding marks. The device is convenient to mount and dismount, can be replaced at any time after being abraded, is free of maintenance in the using process, reduces the labor intensity, and is particularly suitable for being used under the severe working condition of an outlet of the coal mill.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mill equipment technical field, namely a detachable thermal resistance wear -resistant protection device. BACKGROUND

[0002] In the prior art, for the operation of the coal mill, the outlet temperature is an important parameter that needs to be controlled in the hot state operation, and effective control of the outlet temperature can improve the furnace negative pressure fluctuation, improve the coal powder dryness, prevent powder accumulation and prevent coal powder explosion. Therefore, the detection equipment of the outlet temperature requires high stability, long service life and other characteristics. The coal mill outlet is the last channel in the milling process, and a large amount of coal powder passes through the outlet channel along with the airflow. The PT100 wear-resistant thermal resistance is directly inserted into the outlet channel for measurement, and a large amount of prepared coal powder is carried out of the coal mill by the airflow, and the outlet temperature thermal resistance is long-term washed and rubbed by the coal powder, which causes the thermal resistance protective sleeve to wear and accelerate. After the protective sleeve is worn out, the coal powder continues to wash the insulating tube inside the thermal resistance until the thermal resistance fails, resulting in rapid decline of the service life of the thermal resistance. SUMMARY

[0003] The utility model discloses a kind of detachable thermal resistance wear-resistant protection devices with protective structure, it is convenient to install and replace.

[0004] The technical solution of the utility model is: a detachable thermal resistance wear-resistant protection device is composed of outer thread base and inner thread base, the inner thread base is welded and fixed in the coal mill outlet pipeline, the outer thread base is fixed with the inner thread base by thread, and the PT100 thermal resistance is inserted into the outer thread base and fixed by thread sleeve; The front end of thread sleeve is provided with diamond steel pipe, the rear end of thread sleeve is provided with sleeve nut, and the sleeve nut is provided with diamond steel pipe acute angle corresponding mark.

[0005] The outer thread base is provided with a counterbore for accommodating the thread sleeve.

[0006] The utility model discloses a simple structure, the device is installed on the mill outlet pipe, and the PT100 thermal resistance is inserted into the outer thread base through the thread sleeve, and the thread sleeve is fixed, and the device is convenient to install and dismount, and the device can be replaced at any time after wearing, and the device realizes maintenance-free in the use process, reduces the labor intensity, and is especially suitable for use under the bad working condition of the mill outlet.

[0007] The embodiments of the utility model will be described further in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the structural diagram of the utility model.

[0009] Figure 2 It is the structural diagram of the thread sleeve.

[0010] In the drawing, the names of parts are as follows: mill outlet pipe 1, inner thread base 2, outer thread base 3, PT100 thermal resistance 4, sleeve nut 5, mark 6, thread sleeve 7, diamond steel pipe 8, counterbore 9. PREFERRED EMBODIMENT

[0011] Referring to Figure 1 , 2A kind of thermal resistance wear protection device, by outer thread base 3 and inner thread base 2, with good 304 stainless steel material of heat conduction, wear resistance. Inner thread base 2 is welded and fixed in coal mill outlet pipeline 1, outer thread base 3 is fixed with inner thread base 2 by thread, PT100 thermal resistance 4 is inserted into outer thread base 3 and fixed by thread, temperature detection can be carried out after wiring and power supply of thermal resistance 4. Threaded sleeve 7 front end has diamond steel pipe 8, threaded sleeve 7 rear end has sleeve nut 5, sleeve nut 5 has diamond steel pipe 8 acute angle corresponding mark 6, it is convenient to adjust the angle of diamond steel pipe 8, so that it keeps horizontal with the flow direction of wind coal mixture, reduce the scouring and friction of wind coal mixture to it. Outer thread base 3 middle part has the counterbore 9 of accommodating threaded sleeve 7 screwing, the function of counterbore 9 is convenient to insert and fix the PT100 thermal resistance of threaded sleeve, and play the sealing effect of coal mill outlet pipeline and outside.

[0012] The device is inserted into coal mill outlet pipeline 1 and directly contacted with wind coal mixture, its own temperature is consistent with the temperature of wind coal mixture. PT100 thermal resistance 4 can directly avoid the scouring and friction of coal powder in coal mill outlet pipeline 1 to thermal resistance after being inserted into protection device. While protecting PT100 thermal resistance 4, it does not affect the detection of coal mill outlet temperature, greatly improves the service life of thermal resistance, saves equipment cost. The design of diamond steel pipe 8 effectively reduces the scouring and friction of wind coal mixture to protection device, and the service life of protection device can reach more than 5 years. The product has the characteristics of convenient installation and replacement, maintenance-free, low cost, wear resistance, long service life, etc., can greatly improve the service life of coal mill outlet thermal resistance.

[0013] The above description is only the specific implementation of the present application, various examples do not constitute limitation to the essential content of the present application.

Claims

1. A removable thermal resistance wear protection device, characterized in that It is composed of an outer threaded base (3) and an inner threaded base (2), the inner threaded base (2) is welded and fixed on a coal mill outlet pipeline (1), the outer threaded base (3) is fixed with the inner threaded base (2) through threads, a PT100 thermal resistance (4) is inserted into the outer threaded base (3) and fixed through a threaded sleeve (7); the threaded sleeve (7) is provided with a diamond steel pipe (8) at the front end, the threaded sleeve (7) is provided with a sleeve nut (5) at the rear end, and the sleeve nut (5) is provided with an acute angle corresponding mark (6) of the diamond steel pipe (8).

2. A removable thermal resistance wear protection device according to claim 1, characterized in that The outer threaded base (3) is provided with a counterbore (9) in the middle for accommodating the threaded sleeve (7).

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