Vertical sealing structure for pull rod of coal mill

Abstract

The utility model discloses a coal mill pull rod up-and-down sealing structure which comprises a pull rod body and two sealing shells, the two sealing shells are detachably connected through bolts, a top groove is formed in the top end of each sealing shell, a threaded groove is formed in the surface of each top groove, the bottom of each threaded groove is communicated with the inner side space of the corresponding sealing shell, and the inner side of each threaded groove is in threaded connection with a threaded rod. The bottom of the screw makes contact with a triangular block, and the triangular block is located on one side of a sealing block sleeving the surface of the pull rod body. According to the utility model, the two sealing shells are arranged to protect each layer of sealing structure inside, so that the sealing shells can be quickly disassembled when maintenance is needed, the parts with problems can be conveniently checked, the layers of the sealing shells do not need to be disassembled one by one, and the operation is relatively convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mill sealing technical field, concretely is a kind of coal mill pull rod upper and lower sealing structure. BACKGROUND

[0002] Coal mill is the mechanical that coal block is broken and is ground into coal powder, it is important auxiliary equipment of coal powder furnace, and the pull rod of coal mill is important component of coal mill, mainly installed at the bottom or upper portion of coal mill, by connecting coal mill and base (or upper structure), play the role of fixed and support, ensure that coal mill is more stable in the process of operation, avoid appearing to sway, swing and other dangerous, to ensure the safe operation of coal mill;Coal powder is contacted with air in the process of operation of coal mill, if there is no sealing structure at pull rod, coal powder is easily leaked from the gap between pull rod and machine body, cause environmental pollution and energy waste, therefore, sealing structure needs to be set at the pull rod of coal mill.

[0003] At present, part of pull rod will set multiple sealing materials, to improve the effect of sealing, for example, in the upper and lower sealing structure of the pull rod of coal mill of patent number CN220227823 U, the upper end of pull rod is sealed by sealing chamber, inner sealing ring, first outer sealing ring and cover, to improve the sealing effect of the upper end of pull rod;The lower end of pull rod is sealed by clamping plate and second outer sealing ring, to improve the sealing effect of the lower end of pull rod, high molecular elastic sealing and dynamic sealing piece are combined with iron rod up and down, have elasticity and play compensation effect, increase equipment operation efficiency, improve the use of pull rod, also produce effect, optimize field environment;But sealing material can be aged for a long time, needs to be overhauled, since the sealing material in the sealing box is distributed layer by layer, it is inconvenient to check which part has problem when overhauling, needs to check layer by layer, it is more troublesome. Therefore, a new technical scheme is needed to solve it. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of coal mill pull rod upper and lower sealing structure, solve the problem that the sealing material in the sealing box in the background art is distributed layer by layer, it is inconvenient to check which part has problem when overhauling, needs to check layer by layer, it is more troublesome.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of coal mill pull rod upper and lower sealing structure, including pull rod main body and sealing shell, two the sealing shell is detachably connected by bolt, the top of the sealing shell is equipped with top groove, the surface of the top groove is equipped with thread groove, the bottom of the thread groove is communicated with the inside space of the sealing shell, and the inside thread of the thread groove is connected with screw rod, the bottom of the screw rod is in contact with triangular block, the triangular block is located in the side of sealing block that is sleeved on the surface of pull rod main body.

[0006] In the technical scheme, the sealing shells shield the layers of sealing materials from the side, so that when inspection and maintenance is performed, the layers of sealing materials can be viewed simultaneously by only removing the sealing shells from the side, without removing the layers one by one, thereby improving convenience and practicality of the device; after a long time, a gap can be generated between the sealing block and the pull rod body, the screw rod in the threaded groove can be twisted to move downward and push the triangular block, at this time, the triangular block pushes the sealing block horizontally, so that the sealing block is more attached to the pull rod body, thereby improving the sealing effect.

[0007] Preferably, the upper and lower ends of the sealing shells are respectively provided with a first outer sealing ring and a second outer sealing ring, and the first outer sealing ring and the second outer sealing ring are sleeved on the surface of the pull rod body.

[0008] Preferably, the inner side of the top groove is detachably connected with a fixing ring through a bolt, and the bottom of the fixing ring is provided with a sealing gasket.

[0009] Preferably, the surface of the pull rod body between the sealing block and the first outer sealing ring is sleeved with a first buffer ring, and the surface of the pull rod body between the sealing block and the second outer sealing ring is sleeved with a second buffer ring.

[0010] Preferably, the top end and the bottom of the sealing block are respectively in contact with the first buffer ring and the second buffer ring, and the inner side wall of the sealing block is provided with a plurality of annular grooves.

[0011] Preferably, the bottom of the screw rod is in a smooth semispherical shape, and the surface of the screw rod is sleeved with a gasket for sealing.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The utility model discloses two sealing shells are arranged to shield the layers of sealing materials from the side, so that when inspection and maintenance is performed, the layers of sealing materials can be viewed simultaneously by only removing the sealing shells from the side, without removing the layers one by one, thereby improving convenience and practicality of the device.

[0014] 2. The utility model discloses a threaded groove, a triangular block and a sealing block are arranged to improve the sealing effect, after a long time, a gap can be generated between the sealing block and the pull rod body, at this time, the screw rod in the threaded groove can be twisted to move downward and push the triangular block, at this time, the triangular block pushes the sealing block horizontally, so that the sealing block is more attached to the pull rod body, thereby improving the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the utility model will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0016] Figure 1 It is the overall view of the utility model;

[0017] Figure 2 It is the sectional view of the utility model;

[0018] Figure 3 It is the internal structure schematic view of the sealing shell.

[0019] In the drawing: 1, pull rod main body; 2, sealing shell; 3, top groove; 4, fixed ring; 5, thread groove; 6, screw rod; 7, triangular block; 8, sealing block; 9, No. 1 outer sealing ring; 10, No. 1 buffer ring; 11, No. 2 buffer ring; 12, No. 2 outer sealing ring. Specific implementation

[0020] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the following further elaborates in combination with specific implementation.

[0021] A kind of upper and lower sealing structure of coal mill pull rod, see Figures 1 to 3 Including pull rod main body 1 and sealing shell 2, two sealing shells 2 are detachably connected by bolt, and the same face of two sealing shells 2 is also provided with sealing pad, the top end of sealing shell 2 is provided with top groove 3, the surface of top groove 3 is provided with thread groove 5, the bottom of thread groove 5 is communicated with the inside space of sealing shell 2, and the inside of thread groove 5 is screw connected with screw rod 6, the bottom of screw rod 6 is in contact with triangular block 7, and triangular block 7 is located on the side of sealing block 8 that is sleeved on the surface of pull rod main body 1.

[0022] Specifically, as shown in Figure 2 And Figure 3 The upper and lower ends of sealing shell 2 are respectively provided with No. 1 outer sealing ring 9 and No. 2 outer sealing ring 12, No. 1 outer sealing ring 9 and No. 2 outer sealing ring 12 are sleeved on the surface of pull rod main body 1, No. 1 sealing ring and No. 2 sealing ring seal the upper and lower ends of sealing shell 2 respectively, and provide lateral extrusion capacity for the movement of pull rod main body 1, cooperate with the center sealing block 8, further improve the overall sealing effect.

[0023] As shown in Figure 3 The inside of top groove 3 is detachably connected with fixed ring 4 by bolt, the bottom of fixed ring 4 is provided with sealing pad, and fixed ring 4 is mainly used for connecting two sealing shells 2, and conveniently shielding and sealing the lower thread groove 5, to avoid air leakage at the thread hole.

[0024] As shown in Figure 2 And Figure 3As shown, the surface of the pull rod body 1 between the sealing block 8 and the first outer sealing ring 9 is sleeved with a first buffer ring 10, and the surface of the pull rod body 1 between the sealing block 8 and the second outer sealing ring 12 is sleeved with a second buffer ring 11, the first buffer ring 10 and the second buffer ring 11 can buffer when moving laterally on the pull rod body 1, avoid impacting the inner wall of the sealing shell 2, and can also play a partial sealing shielding effect.

[0025] As shown in the drawings, Figure 2 and Figure 3 As shown, the top end and the bottom end of the sealing block 8 are in contact with the first buffer ring 10 and the second buffer ring 11 respectively, and the inner side wall of the sealing block 8 is provided with a plurality of annular grooves, so as to reduce the contact surface between the inner hole wall and the pull rod body 1, increase the elastic deformation, and improve the sealing effect.

[0026] As shown in the drawings, Figure 2 Figure 3 As shown, the bottom of the screw rod 6 is in a smooth semispherical shape, and the surface of the screw rod 6 is sleeved with a gasket for sealing, when the screw rod 6 is twisted downward, the triangular block 7 is pushed to move towards the sealing block 8, and the sealing gasket can increase the sealing property at the threaded groove 5.

[0027] In actual use, the second outer sealing ring 12, the second buffer ring 11, the sealing block 8, the first buffer ring 10 and the first outer sealing ring 9 are sleeved on the pull rod body 1, and then the two sealing shells 2 are clamped from both sides and fixed by bolts, since the sealing shells 2 shield each layer of sealing material from the side, when checking and maintaining, only the sealing shells 2 from the side need to be disassembled, so that each layer of sealing material can be viewed at the same time, without disassembling layer by layer, the convenience and practicality of the device are improved, and through the threaded groove 5, the triangular block 7 and the sealing block 8, the sealing effect can be improved, after a long time, a gap may be generated between the sealing block 8 and the pull rod body 1, at this time, the screw rod 6 in the threaded groove 5 can be twisted to move downward and push the triangular block 7, at this time, the triangular block 7 pushes the sealing block 8 transversely, so that the sealing block 8 is more attached to the pull rod body 1, thereby improving the sealing effect, and the sealing block 8 can be replaced subsequently.

[0028] In addition, the components designed in the utility model are all general standard components or components known by those skilled in the art, the structure and principle of which can be known by those skilled in the art through technical manuals or through conventional experimental methods, and those skilled in the art can realize it, without further description, and the content protected by the utility model does not involve improvement of the internal structure and method.

[0029] The utility model discloses an embodiment discloses the better embodiment, but is not limited to this, and the ordinary skill of the art, the spirit of the utility model is appreciated to the above -mentioned embodiment, and different extension and change are made, but as long as not departing from the spirit of the utility model, all are in the protection range of the utility model.

Claims

1. A sealing structure for the upper and lower of the pull rod of a coal mill, comprising a pull rod body (1) and a sealing shell (2), characterized in that: Two sealing shells (2) are detachably connected by bolts, top ends of the sealing shells (2) are provided with top grooves (3), surfaces of the top grooves (3) are provided with threaded grooves (5), bottoms of the threaded grooves (5) are in communication with inner spaces of the sealing shells (2), inner sides of the threaded grooves (5) are threadedly connected with screw rods (6), bottoms of the screw rods (6) are in contact with triangular blocks (7), and the triangular blocks (7) are located on one side of sealing blocks (8) sleeved on surfaces of pull rod bodies (1).

2. A seal structure for a coal mill tie rod as claimed in claim 1, wherein: Upper and lower ends of the sealing shells (2) are respectively provided with a first outer sealing ring (9) and a second outer sealing ring (12), and the first outer sealing ring (9) and the second outer sealing ring (12) are sleeved on surfaces of the pull rod bodies (1).

3. A seal for a coal mill tie rod as claimed in claim 1, wherein: Inner sides of the top grooves (3) are detachably connected with fixing rings (4) by bolts, and bottoms of the fixing rings (4) are provided with sealing pads.

4. A seal for a coal mill tie rod as claimed in claim 2, wherein: Surfaces of the pull rod bodies (1) between the sealing blocks (8) and the first outer sealing rings (9) are sleeved with first buffer rings (10), and surfaces of the pull rod bodies (1) between the sealing blocks (8) and the second outer sealing rings (12) are sleeved with second buffer rings (11).

5. A seal for a coal pulverizer rod as defined in claim 1, wherein: Top ends and bottoms of the sealing blocks (8) are respectively in contact with the first buffer rings (10) and the second buffer rings (11), and inner side walls of the sealing blocks (8) are provided with a plurality of annular grooves.

6. A seal for a coal pulverizer rod as defined in claim 1, wherein: Bottoms of the screw rods (6) are smooth hemispherical, and surfaces of the screw rods (6) are sleeved with sealing washers.

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