Case pull rod sealing cover mounting structure on roller type coal mill

Abstract

The utility model relates to a shell pull rod sealing cover mounting structure on a roller type coal mill. The shell pull rod sealing cover mounting structure comprises a sealing cover body, a jacking screw and a screw support, the sealing cover body comprises an upper part and a lower part, the lower part is hermetically inserted into the pull rod via hole, and the upper part is in contact with the upper end, located in the pull rod via hole, of the shell; a threaded through hole is formed in the middle of the screw support, the screw support is arranged over the sealing cover body, and one side of the screw support is hinged to a plurality of hinge bases fixed to a shell of the roller type coal mill. The other side of the screw support is fixedly connected with a roller type coal mill shell through a quick release assembly; the jacking screw rod is in threaded connection with the interior of the threaded through hole in the middle of the screw rod support, and the lower end of the jacking screw rod is in pressing contact with the middle of the upper end of the sealing cover body, so that the sealing cover body is pressed at a pull rod via hole in a shell of the roller type coal mill. The sealing device improves the sealing effect at the position of the pull rod through hole, reduces powder leakage and air leakage, and has the advantages of being convenient to assemble and disassemble, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model belongs to the field of roller coal mill equipment, in particular to a casing tie rod sealing cover installation structure on a roller coal mill. Background Art

[0002] The casing tie rod sealing cover on the existing roller coal mill adopts a circular plate structure, a circle of screw through holes is arranged on the circular plate, and a tie rod through hole for the tie rod to pass through is arranged on the upper part of the casing corresponding to the position of the tie rod, the sealing cover is covered on the upper position of the tie rod through hole on the casing, and a circle of threaded blind holes is arranged on the periphery of the through hole. The threaded blind holes are aligned one by one with the screw through holes on the sealing cover, and the sealing cover is fixed to the upper end of the casing by inserting locking screws.

[0003] The operating environment of the roller coal mill is a dusty environment. Dust will fall on the upper end of the sealing cover and the surface of the casing where it is installed. In addition, when the machine is shut down for maintenance or when the tie rod is replaced online, dust will be introduced on the upper and outer parts of the sealing cover. When the sealing cover is removed, dust will enter the threaded blind hole and accumulate. Due to the threaded blind hole structure, it is difficult to thoroughly clean the dust inside, resulting in the inability to tighten the screws after the sealing cover is installed again, so that there is a small gap between the lower end of the sealing cover and the tie rod through hole on the casing. When the roller coal mill enters the grinding action again, the coal powder will be discharged through the small gap, causing the sealing cover to leak powder and air to escape, which poses a hidden danger to the coal mill. In addition, the sealing cover is fixed by a circle of screws, which is also troublesome and time-consuming to install and disassemble. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, the utility model provides a casing rod sealing cover installation structure on a roller coal mill, which is convenient for installation and disassembly, saves maintenance time, can enhance the sealing effect, and reduce powder leakage and air leakage.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A casing tie rod sealing cover installation structure on a roller coal mill, comprising a sealing cover body, a top pressure screw and a screw support;

[0007] The sealing cover body comprises an upper part and a lower part, wherein the lower part is sealed and inserted into the pull rod through hole, and the upper part is in contact with the housing at the upper end of the pull rod through hole;

[0008] A threaded through hole is provided in the middle of the screw support, the screw support is arranged just above the sealing cover body, one side of the screw support is hingedly connected to a plurality of hinge seats fixed on the roller coal mill casing; the other side of the screw support is fixedly connected to the roller coal mill casing through a quick-release assembly;

[0009] The pressing screw is threadedly connected to the threaded through hole in the middle of the screw support, and the lower end of the pressing screw is pressed and contacted with the middle of the upper end of the sealing cover body, so that the sealing cover body is pressed and installed on the pull rod through hole on the roller mill housing.

[0010] Moreover, the sealing cover body includes an upper pressure plate part, a lower annular sleeve part, an upper pressure platform part and a reinforcing rib part; the outer diameter of the upper pressure plate part is larger than the diameter of the pull rod through hole on the casing; the lower annular sleeve part is coaxially connected to the lower end of the upper pressure plate part, and its outer diameter is consistent with the diameter of the pull rod through hole, and an annular groove is provided on the outer side surface of the annular sleeve part, and a sealing ring is embedded in the annular groove, and a sealing contact is formed with the hole wall of the pull rod through hole through the sealing ring; the upper pressure platform part is coaxially connected to the upper end of the upper pressure plate part, and its upper end is a clamping action surface; the reinforcing rib part is radially connected between the upper end of the upper pressure plate part and the outer side of the upper pressure platform part.

[0011] Moreover, the screw support includes a bracket plate portion, a truncated cone portion and a reinforcing rib portion; the truncated cone portion is arranged at the center position of the upper end of the bracket plate, and is provided with a threaded through hole aligned with the center of the bracket plate portion, and the reinforcing rib portion is radially connected between the upper end of the bracket plate portion and the outer side of the truncated cone portion.

[0012] Moreover, the quick-release assembly structure includes a pin shaft seat, a pin shaft and a pin head; the pin head is fixedly installed on the other side of the bracket plate in an outwardly extending manner, and a pin hole is provided on the pin head; the pin shaft seat is fixedly installed on the roller mill casing, including a base, two vertical plates welded vertically on the base, a slot is formed between the two vertical plates, and coaxial pin holes are provided on the two vertical plates; the pin head is inserted into the slot, the pin hole on the pin head is coaxial with the pin hole on the pin shaft seat, and the pin shaft is inserted into the pin hole, so that the other side of the screw bracket forms a quick-release fixed connection with the roller mill casing.

[0013] Moreover, a handle is fixedly installed on the upper end of the pressing screw.

[0014] Moreover, a plurality of downwardly extending elastic clamping members are vertically fixedly connected along the circumferential direction at the lower end of the bracket plate portion of the screw bracket corresponding to the position between the reinforcing ribs of the sealing cover body; when the screw bracket is in a lowered state, the lower ends of the plurality of elastic clamping members form a pressing contact with the upper end of the upper pressure plate portion of the sealing cover body.

[0015] The advantages and positive effects of the utility model are:

[0016] 1. The utility model redesigns the sealing cover and adopts a structural form of an upper pressure plate part and an annular sleeve part. The annular sleeve part is inserted into the pull rod through hole, and a sealing ring is installed to achieve a primary seal. The upper pressure plate part is pressed and contacted with the end face of the casing to achieve a secondary seal, thereby achieving a better sealing effect.

[0017] 2. The present invention compresses the sealing cover body by means of a pressing screw, which is connected to a screw bracket, one end of which is hinged to the housing, and the other end of which is connected by a quick-release assembly. When the sealing cover body needs to be disassembled, it is only necessary to slightly loosen the pressing screw, unfasten the quick-release assembly, rotate and lift the screw support around the hinge axis, and then lift up the sealing cover body to achieve disassembly. When the sealing cover body needs to be installed, it is only necessary to insert the lower part of the sealing cover body into the pull rod through hole, rotate and lower the screw support around the hinge axis, connect the quick-release assembly, tighten the pressing screw, and press the pressing screw against the upper end of the sealing cover body to achieve installation of the sealing cover body. This has the advantages of convenient disassembly and installation, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the installation of the sealing cover of the utility model;

[0019] Figure 2 It is a top view of the installation of the sealing cover of the utility model. DETAILED DESCRIPTION

[0020] The structure of the utility model is further described below with reference to the accompanying drawings and through embodiments. It should be noted that the embodiments are descriptive rather than restrictive.

[0021] A casing tie rod sealing cover installation structure on a roller coal mill, see Figure 1-2 , mainly includes a sealing cover body 6, a top pressing screw 5 and a screw support 3.

[0022] The sealing cover body includes an upper pressure plate part 6.1, a lower annular sleeve part 6.2, an upper pressure platform part 6.4 and a reinforcing rib part 6.3. The outer diameter of the upper pressure plate part is larger than the diameter of the pull rod through hole on the casing. The annular sleeve part is coaxially connected to the lower end of the upper pressure plate part, and its outer diameter is consistent with the diameter of the pull rod through hole, and an annular groove is provided on the outer side surface of the annular sleeve part. The upper pressure platform part is coaxially connected to the upper end of the upper pressure plate part, and its upper end is a clamping surface. The reinforcing rib part is radially connected between the upper end of the upper pressure plate part and the outer side of the upper pressure platform part, which plays a role in improving the strength of the sealing cover body. The annular sleeve part of the sealing cover body is inserted into the pull rod through hole, and forms a sealing contact with the pull rod through hole through the sealing ring 7 embedded in the annular groove. The upper pressure plate part contacts the casing 1 at the upper end of the pull rod through hole.

[0023] The screw support is used to realize the installation of the top pressure screw, and it adopts a pressure plate structure with a threaded through hole in the middle. In order to ensure the structural strength of the screw support, its structural form is preferably: including a support plate part 3.2, a truncated cone part 3.1 and a reinforcing rib part 3.3, the truncated cone part is arranged at the center position of the upper end of the support plate, and a threaded through hole is arranged inside and connected to the center of the support plate part, and the reinforcing rib part is radially connected between the upper end of the support plate part and the outer side of the truncated cone part. The screw support is arranged as a whole just above the sealing cover body, one side of the screw support is hingedly connected to a plurality of hinge seats 8 fixed on the roller mill casing, and the other side of the screw support is fixedly connected to the roller mill casing through a quick release assembly 2.

[0024] The quick-release assembly can adopt a variety of structural forms. In the utility model, the quick-release assembly structure includes a pin shaft seat 2.1, a pin shaft 2.2 and a plug head 2.3. The plug head is fixedly installed on the other side of the bracket plate in an outwardly extending manner, and a pin hole is provided on the plug head; the pin shaft seat is fixedly installed on the roller coal mill casing, and includes a base, and two vertical plates vertically welded to the base, a slot is formed between the two vertical plates, and coaxial pin holes are provided on the two vertical plates. The plug head is inserted into the slot, and the pin hole on the plug head is coaxial with the pin hole on the pin shaft seat. The pin shaft is inserted into the pin hole to realize the quick-release fixed connection between the other side of the screw bracket and the coal mill casing.

[0025] The pressing screw is threadedly connected to the threaded through hole in the middle of the screw support, and the lower end of the pressing screw is pressed and contacted with the middle of the upper end of the sealing cover body, so that the sealing cover body is pressed and installed on the pull rod through hole on the roller mill housing. In order to facilitate the adjustment of the pressing screw, a handle 4 is further fixedly installed on the upper end of the pressing screw, and the handle can be a disc-shaped handle as shown in the drawings but is not limited thereto.

[0026] In order to improve the clamping effect on the sealing cover body, in the utility model, a plurality of downwardly extending elastic clamping members can be vertically fixedly connected along the circumferential direction at the lower end of the bracket plate portion of the screw bracket corresponding to the position between the reinforcing ribs of the sealing cover body. For example, a compression spring is used. While the top pressing screw clamps the sealing cover body, the sealing cover body is assisted by a plurality of elastic clamping members, thereby improving the clamping force on the sealing cover body and firmly clamping the sealing cover body to the position of the pull rod through hole, thereby achieving a better sealing effect and avoiding the problems of powder leakage and air leakage at the pull rod through hole position.

[0027] In order to facilitate the disassembly of the sealing cover body, a handle can be connected to the upper pressure plate part without affecting the matching position of the sealing cover body and the screw support.

[0028] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A casing tie rod sealing cover installation structure on a roller coal mill, characterized in that: It includes a sealing cover body, a pressing screw and a screw support; The sealing cover body comprises an upper part and a lower part, wherein the lower part is sealed and inserted into the pull rod through hole, and the upper part is in contact with the housing at the upper end of the pull rod through hole; A threaded through hole is provided in the middle of the screw support, the screw support is arranged just above the sealing cover body, one side of the screw support is hingedly connected to a plurality of hinge seats fixed on the roller coal mill casing; the other side of the screw support is fixedly connected to the roller coal mill casing through a quick-release assembly; The pressing screw is threadedly connected to the threaded through hole in the middle of the screw support, and the lower end of the pressing screw is pressed and contacted with the middle of the upper end of the sealing cover body, so that the sealing cover body is pressed and installed on the pull rod through hole on the roller mill housing.

2. The casing tie rod sealing cover installation structure on the roller coal mill according to claim 1 is characterized in that: The sealing cover body includes an upper pressure plate part, a lower annular sleeve part, an upper pressure platform part and a reinforcing rib part; the outer diameter of the upper pressure plate part is larger than the diameter of the pull rod through hole on the casing; the lower annular sleeve part is coaxially connected to the lower end of the upper pressure plate part, and its outer diameter is consistent with the diameter of the pull rod through hole, and an annular groove is provided on the outer side surface of the annular sleeve part, and a sealing ring is embedded in the annular groove, and a sealing contact is formed with the hole wall of the pull rod through hole through the sealing ring; the upper pressure platform part is coaxially connected to the upper end of the upper pressure plate part, and its upper end is a clamping action surface; the reinforcing rib part is radially connected between the upper end of the upper pressure plate part and the outer side of the upper pressure platform part.

3. The casing tie rod sealing cover installation structure on the roller coal mill according to claim 2 is characterized in that: The screw support includes a bracket plate portion, a truncated cone portion and a reinforcing rib portion; the truncated cone portion is arranged at the center position of the upper end of the bracket plate, and is provided with a threaded through hole aligned with the center of the bracket plate portion, and the reinforcing rib portion is radially connected between the upper end of the bracket plate portion and the outer side of the truncated cone portion.

4. The casing tie rod sealing cover installation structure on the roller coal mill according to claim 3 is characterized in that: At the lower end of the bracket plate portion of the screw bracket, a plurality of downwardly extending elastic clamping members are vertically fixedly connected along the circumferential direction at a position corresponding to the position between the reinforcing ribs of the sealing cover body; when the screw bracket is in a lowered state, the lower ends of the plurality of elastic clamping members form a pressing contact with the upper end of the upper pressure plate portion of the sealing cover body.

5. The casing rod sealing cover installation structure on the roller coal mill according to claim 1, characterized in that: The quick-release assembly structure includes a pin shaft seat, a pin shaft and a pin head; the pin head is fixedly installed on the other side of the bracket plate in an outwardly extending manner, and a pin hole is provided on the pin head; the pin shaft seat is fixedly installed on the roller mill casing, including a base, two vertical plates welded vertically on the base, a slot is formed between the two vertical plates, and coaxial pin holes are provided on the two vertical plates; the pin head is inserted into the slot, the pin hole on the pin head is coaxial with the pin hole on the pin shaft seat, and the pin shaft is inserted into the pin hole, so that the other side of the screw bracket forms a quick-release fixed connection with the roller mill casing.

6. The casing tie rod sealing cover installation structure on the roller coal mill according to claim 1, characterized in that: A handle is fixedly installed on the upper end of the pressing screw rod.

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