CN219187156U

CN219187156U - Sealing nut device

Info

Publication number: CN219187156U
Application number: CN202320010487.6U
Authority: CN
Inventors: 冯路尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-06-16
Anticipated expiration: 2033-01-04

Abstract

The utility model discloses a sealing nut device, which aims to solve the technical problems that the existing sealing nut is difficult to overhaul and deformation cannot be observed. The utility model comprises a sealing nut and a sealing gasket, wherein the sealing nut comprises an internal thread and an outer side wall, an annular clamping groove is formed in the bottom surface of the outer side wall, an annular protrusion matched with the annular clamping groove is arranged on the upper surface of the sealing gasket, an elastic supporting piece is arranged in the annular clamping groove, two ends of the elastic supporting piece are respectively connected to the top surface of the annular clamping groove and the bottom surface of the annular protrusion, and an observation hole is further formed in the outer side wall of the sealing nut and communicated with the annular clamping groove. The utility model has the beneficial effects that: stable structure, easy observation and convenient maintenance.

Description

Sealing nut device

Technical Field

The utility model relates to the technical field of coal mills, in particular to a sealing nut device.

Background

The steel ball coal mill or the wet ball mill is one of main auxiliary machines of boilers and ash sulfur professions of thermal power plants. The ball mill is driven by a motor through a speed reducer and a peripheral big gear. The inside of the cylinder is provided with a proper grinding body, namely a steel ball, which is lifted to a certain height under the action of centrifugal force and lining tile friction force and falls in a throwing or discharging state. The lining tile of the ball mill is a key vulnerable part of the coal mill, and is mainly used for protecting the cylinder body from direct impact and grinding of grinding bodies and materials, and the lining tile is fixed with the cylinder body through square bolts.

In the working process of the coal mill, the lining tiles are continuously worn, and meanwhile, the square head bolts are easy to loosen due to the striking and vibration of the steel balls. After the coal mill runs for a long period, impact forces received by lining tiles in all areas in the cylinder are different, and in addition, the square head bolt rubber sealing ring deforms, the axial gap is enlarged, the phenomena of powder leakage and slurry leakage are easy to occur, nut welding spots are required to be ground after equipment stops running each time, and replacement is inconvenient after the loosening condition is checked.

The existing sealing nut has the following defects: 1. after the nut sealing ring of the square head bolt of the coal mill barrel is aged or stressed to be deformed and loosened, the deformation cannot be observed normally, and leakage points are easy to occur.

2. The prior coal mill barrel square head bolt and nut are fastened and then spot-welded to prevent falling, so that the conventional coal mill barrel square head bolt and nut are inconvenient to overhaul again.

3. The axial deformation of each square head bolt of the coal mill barrel is inconsistent, and normal data analysis can not be carried out on the abrasion condition of the lining tiles inside from the outside of the coal mill barrel.

Disclosure of Invention

The utility model provides a sealing nut device, which aims to solve the technical problems that the existing sealing nut is difficult to overhaul and deformation cannot be observed.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a sealing nut device, includes sealing nut, sealing washer, sealing nut includes internal thread and lateral wall, the bottom surface of lateral wall is provided with annular draw-in groove, sealing washer's upper surface be provided with the annular bulge that annular draw-in groove matches, be provided with elastic support spare in the annular draw-in groove, elastic support spare's both ends are connected respectively in the top surface and the bellied bottom surface of annular draw-in groove the last observation hole that still is provided with of sealing nut's lateral wall, this observation hole with annular draw-in groove is linked together.

Further, the thickness of the outer side wall of the sealing nut is more than 1/2 of the diameter of the internal thread, and the annular clamping groove is arranged in the middle of the bottom surface of the outer side wall.

Further, the sealing gasket is arranged to be of a columnar structure with an intrados surface, a bolt hole is arranged in the center of the sealing gasket, and the annular protrusion is arranged on the periphery of the bolt hole. The annular bulge is arranged on the top surface of the sealing gasket, the sealing nut is fixed on a bolt in the middle of the sealing gasket, and a gap is reserved between the bottom surface of the sealing nut and the top surface of the sealing gasket.

Further, the sealing gasket is made of silicone rubber, nitrile rubber or metal rubber. The elastic supporting piece is one of an integral spring, a uniformly distributed spring body or a spring piece. The observation holes are vertical strip-shaped holes, and the elastic support piece is provided with telescopic marks.

Compared with the prior art, the utility model has the beneficial technical effects that:

1. the nut is fastened and then receives a counter force of the elastic support piece, so that the stability of the nut can be enhanced, and the loosening phenomenon of the nut in the running process of the coal mill can be reduced.

2. According to the utility model, the data statistics of the axial deformation of each square head bolt is recorded through the observation hole, so that the abrasion analysis of the lining plate in the cylinder can be performed, the stress analysis in the cylinder can be performed in advance, and the replacement cost of the lining plate in the coal mill is saved.

Drawings

Fig. 1 is a schematic structural view of a gland nut apparatus of the present utility model.

Fig. 2 is an exploded view of the gland nut apparatus of the present utility model.

Fig. 3 is a schematic bottom view of a nut according to the present utility model.

Fig. 4 is a cross-sectional view of the gland nut apparatus of the present utility model.

Fig. 5 is a schematic view of the installation of the gland nut apparatus of the present utility model.

In the figure, a nut 1, a sealing washer 2, a spring 3, an observation hole 4, a threaded hole 5, an outer side wall 6, an annular clamping groove 7, an annular protrusion 8, a bolt hole 9, a bolt 10, a coal mill cylinder wall 11, a lining tile 12 and a bolt square head 13.

Detailed Description

The following examples are given to illustrate the utility model in detail, but are not intended to limit the scope of the utility model in any way.

Example 1: a gland nut assembly, see figures 1 to 5, comprises a nut 1 and a gland washer 2 for co-operating with a bolt 10 to secure a bushing 12. The coal mill barrel is cylindrical, a lining tile 12 is arranged on the inner wall of the barrel to protect the barrel, a bolt 10 passes through the lining tile 12 and the coal mill barrel wall 11, and a bolt square head 13 is abutted against the inside of the lining tile 12. A sealing washer 12, which is made of silicone rubber, nitrile rubber or metal rubber, is fitted over the bolt 10 on the outside of the coal mill drum wall 11, and the nut 1 is then screwed onto the bolt 10.

The nut 1 adopts the hexagon nut, including screw hole 5 and lateral wall 6, the bottom surface of lateral wall 6 is provided with annular draw-in groove 7, in order to improve the intensity of nut, and the lateral wall 6 thickness setting of nut is bigger, is more than about 1/2 of internal thread diameter, and annular draw-in groove 7 sets up the intermediate position in lateral wall bottom surface, and is concentric with screw hole 5.

The upper surface at sealing washer 2 is provided with the annular protruding 8 that matches with annular draw-in groove 7, after nut 1 screws up on bolt 10, annular protruding 8 gets into annular draw-in groove 7, sets up elastic support element in annular draw-in groove 7, like one of whole spring, equipartition spring body or spring leaf, adopts spring 3 in this embodiment, and its both ends are connected respectively in the top surface of annular draw-in groove 7 and the bottom surface of annular protruding 8, still are provided with observation hole 4 on the lateral wall of nut 1, and this observation hole 4 is linked together with annular draw-in groove 7.

The sealing gasket 2 can be arranged into a columnar structure with an inner cambered surface or a inverted bowl-shaped structure, and can be adsorbed on the surface of the wall 11 of the coal mill after being pressed, so that the sealing performance is improved. A bolt hole 9 is provided in the center of the sealing washer 2, an annular protrusion 8 is provided on the circumferential side of the bolt hole 9, on the top surface of the sealing washer 2, a nut 1 is fixed on a bolt 10 in the middle of the sealing washer 2, and a gap is provided between the bottom surface of the nut 1 and the top surface of the sealing washer 2.

For the measurement of being convenient for, set up the observation hole 4 into vertical strip hole, be provided with flexible mark simultaneously on elastic support piece, this mark can be the colour of coating on the spring, sets up the instruction scale simultaneously on the observation hole 4 for measure the deformation degree of spring.

The sealing nut device utilizes the principle of spring force. After the coal mill barrel is fastened through a plurality of square head bolts and sealing nut assemblies, the deformation of each nut compression adjustment type spring body is recorded through the compression indication observation hole. The elastic force of the spring is stressed between the nut and the sealing washer, the nut is subjected to a reverse force after being fastened, looseness of the nut in operation is reduced, meanwhile, the deformation of the sealing washer is recorded by the observation hole, and elastic change can be found in time and updated after equipment is stopped. After a maintenance period, the deformation of each nut compression adjustment type spring body of the coal mill barrel is recorded to analyze the stress condition inside the equipment, so that the abrasion loss of the lining plate in the barrel is analyzed, and the purpose of convenience and rapidness is achieved.

While the present utility model has been described in detail with reference to the drawings and the embodiments, those skilled in the art will understand that various specific parameters in the above embodiments may be changed without departing from the spirit of the utility model, and a plurality of specific embodiments are common variation ranges of the present utility model, and will not be described in detail herein.

Claims

1. A gland nut apparatus, characterized in that: including gland nut, sealing washer, gland nut includes internal thread and lateral wall, the bottom surface of lateral wall is provided with annular draw-in groove, sealing washer's upper surface be provided with the annular bulge that annular draw-in groove matches, be provided with elastic support spare in the annular draw-in groove, elastic support spare's both ends are connected respectively in the top surface and the bellied bottom surface of annular draw-in groove the last observation hole that still is provided with of gland nut's lateral wall, this observation hole with annular draw-in groove is linked together.

2. The gland nut apparatus as defined in claim 1, wherein: the thickness of the outer side wall of the sealing nut is more than 1/2 of the diameter of the internal thread, and the annular clamping groove is arranged in the middle of the bottom surface of the outer side wall.

3. The gland nut apparatus as defined in claim 1, wherein: the sealing gasket is of a columnar structure with an intrados surface, a bolt hole is formed in the center of the sealing gasket, and the annular protrusion is arranged on the periphery of the bolt hole.

4. A gland nut apparatus according to claim 3, wherein: the annular bulge is arranged on the top surface of the sealing gasket, the sealing nut is fixed on a bolt in the middle of the sealing gasket, and a gap is reserved between the bottom surface of the sealing nut and the top surface of the sealing gasket.

5. The gland nut apparatus as defined in claim 1, wherein: the sealing gasket is made of silicon rubber, nitrile rubber or metal rubber.

6. The gland nut apparatus as defined in claim 1, wherein: the elastic supporting piece is one of an integral spring, a uniformly distributed spring body or a spring piece.

7. The gland nut apparatus as defined in claim 1, wherein: the observation holes are vertical strip-shaped holes, and the elastic support piece is provided with telescopic marks.