CN113958713B - Hydraulic pull rod sealing device of medium-speed coal mill - Google Patents

Abstract

The application discloses a hydraulic pull rod sealing device of a medium-speed coal mill, which comprises a mounting assembly and a supporting assembly, wherein the mounting assembly comprises a fixed cylinder, a movable plate, a sealing cover and a pull rod, the sealing cover is arranged on the fixed cylinder, a closed cavity is formed inside the fixed cylinder and the sealing cover, the pull rod penetrates through the movable plate, and the movable plate is movably connected with the inner wall of the fixed cylinder; the support assembly comprises a movable ring and a fixed ring, the outer wall of the fixed cylinder penetrates through the movable ring, two ends of the movable ring are movably connected with the fixed ring in a rotating mode, an external thread section is arranged on the outer wall of the sealing cover, an internal thread section is arranged on the inner wall of the fixed cylinder corresponding to the thread section, and the external thread section is matched with the internal thread section; the movable plate can be taken to move in the cavity when the pull rod moves axially, and the outer wall of the pull rod can be protected when the pull rod moves, so that the abrasion on the pull rod is reduced, and the tightness of the pull rod is reduced.

Description

Hydraulic pull rod sealing device of medium-speed coal mill

Technical Field

The application relates to the technical field of coal mills, in particular to a hydraulic pull rod sealing device of a medium-speed coal mill.

Background

The pull rod on the coal mill is an important part in the loading process of the coal mill, and in the loading process, the pull rod can move up and down in a steering manner and also move radially.

Original pull rod seal comprises joint bearing, and the pull rod is worn and torn easily after the pull rod operating time is long and forms the clearance, and current pull rod is made with rigid material, and the sealing member is in high temperature buggy environment, and frequent use can lead to wearing and tearing the pull rod, and lead to the leakproofness of pull rod to become poor, and buggy can reveal along the pull rod outer wall, and the pull rod clearance still has stone coal to leak when big, pollutes the environment, is unfavorable for improving production efficiency.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.

Therefore, the technical problems to be solved by the application are as follows: the pull rod is used for radial and steering movement, so that the pull rod is worn due to frequent use, the tightness of the pull rod is poor, coal dust can leak along the outer wall of the pull rod, stone coal leaks when the gap of the outer wall of the pull rod is large, the environment is polluted, and the production efficiency is not improved.

In order to solve the technical problems, the application provides the following technical scheme: the hydraulic pull rod sealing device for the medium-speed coal mill comprises a mounting assembly and a supporting assembly, wherein the mounting assembly comprises a fixed cylinder, a movable plate, a sealing cover and a pull rod, the sealing cover is arranged on the fixed cylinder, a closed cavity is formed inside the fixed cylinder and the sealing cover, the pull rod penetrates through the movable plate, and the movable plate is movably connected with the inner wall of the fixed cylinder; the support assembly comprises a movable ring and a fixed ring, the outer wall of the fixed cylinder penetrates through the movable ring, and two ends of the movable ring are movably connected with the fixed ring in a rotating mode.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the outer wall of the sealing cover is provided with an external thread section, the inner wall of the fixing cylinder is provided with an internal thread section corresponding to the thread section, and the external thread section is matched with the internal thread section.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the sealing cover is provided with an internal thread pipe, the internal thread pipe is in threaded connection with the outer wall of the locking cover, the locking cover protrudes to form a protruding block, and the outer wall of the protruding block is conical.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the sealing cover is provided with a notch, and the inner diameter of the sealing cover is smaller than the outer diameter of the protruding block.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the inner wall of the locking cover is provided with a through hole, the inner wall of the through hole is provided with a first sealing ring, and the pull rod penetrates through the through hole.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the fixed cylinder bottom wall is provided with a penetrating pipe, the penetrating pipe is arranged corresponding to the penetrating hole, the inner wall of the penetrating pipe is provided with a second sealing ring, and the pull rod penetrates through the penetrating pipe.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the movable plate is provided with a through hole, and a dust filtering net is arranged in the through hole.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the movable ring is provided with a protruding ring, the fixed ring is provided with a limiting groove, and the outer wall of the protruding ring is movably connected with the inner wall of the limiting groove.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the anti-skid groove-shaped locking device is characterized in that an anti-skid groove-shaped locking cover outer wall fixed connection fixing plate is arranged on the inner threaded pipe outer wall, the fixing plate is obliquely arranged on the locking cover outer wall, a screw hole is formed in the fixing plate, and a bolt is connected with threads on the inner wall of the screw hole.

As a preferable scheme of the hydraulic pull rod sealing device of the medium-speed coal mill, the application comprises the following steps: the inner wall of the fixed cylinder is square, and the outer wall of the movable plate is attached to the inner wall of the fixed cylinder.

The application has the beneficial effects that: when the pull rod moves axially, the movable plate can be moved in the cavity, the outer wall of the pull rod can be protected while the pull rod moves, so that the abrasion on the pull rod is reduced, and the tightness of the pull rod is reduced; when the pull rod can do steering operation, through the cooperation between expansion ring and the solid fixed ring, can play sealed effect, guarantee the leakproofness of pull rod outer wall, can protect the pull rod simultaneously, prevent that the pull rod outer wall from wearing and tearing from appearing, lead to the leakproofness of pull rod to become poor.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art. Wherein:

fig. 1 is a schematic view showing the structure of the mounting assembly and the supporting assembly in the first, second and third embodiments.

Fig. 2 is an enlarged schematic view at a in fig. 1 of the first, second and third embodiments.

Fig. 3 is a cross-sectional view of a support assembly in a second embodiment.

Fig. 4 is a sectional view of a stationary barrel in a second embodiment.

Fig. 5 is a cross-sectional view of the seal cap in the second embodiment.

Fig. 6 is a cross-sectional view of the locking cap in a second embodiment.

FIG. 7 is a bottom view of the seal cap in the second embodiment

Detailed Description

In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 and 2, in a first embodiment of the present application, the embodiment provides a hydraulic rod sealing device for a medium speed coal mill, which includes a mounting assembly 100 and a supporting assembly 200, the mounting assembly 100 includes a fixed cylinder 101, a movable plate 102, a sealing cover 103 and a rod 104, the fixed cylinder 101 is provided with the sealing cover 103 capable of being opened and closed, so as to facilitate disassembly and assembly, a sealed cavity 101d is formed inside the fixed cylinder 101 and the sealing cover 103, the rod 104 passes through the movable plate 102, the rod 104 is fixedly connected with the movable plate 102, the movable plate 102 is movably connected with the inner wall of the fixed cylinder 101, the movable plate 102 can be driven to move inside the cavity 101d when the rod 104 moves axially, the outer wall of the rod 104 can be protected while the rod 104 moves, the abrasion on the rod 104 is reduced, and the sealability of the rod 104 is deteriorated.

The support assembly 200 comprises a movable ring 201 and a fixed ring 202, the outer wall of the fixed barrel 101 is fixedly connected and penetrates through the movable ring 201, the two ends of the movable ring 201 are rotatably connected with the fixed ring 202, the pull rod 104 can rotate between the fixed ring 202 along with the fixed barrel 101 and the movable ring 201, the pull rod 104 can rotate and move, meanwhile, the sealing effect can be achieved through the cooperation between the movable ring 201 and the fixed ring 202, the sealing performance of the outer wall of the pull rod 104 is guaranteed, meanwhile, the pull rod 104 can be protected, abrasion of the outer wall of the pull rod 104 is prevented, and the sealing performance of the pull rod 104 is poor.

Example 2

Referring to fig. 1 to 7, in a second embodiment of the present application, based on the previous embodiment, specifically, an external thread section 103a is provided on an outer wall of a sealing cover 103, and an internal thread section 101a is provided on an inner wall of a fixing cylinder 101 corresponding to the thread section 103a, where the external thread section 103a is matched with the internal thread section 101 a. By rotating the sealing cap 103, the male screw section 103a can be screwed into the female screw section 101a of the inner wall of the fixed cylinder 101, combining the sealing cap 103 and the fixed cylinder 101.

In this embodiment, specifically, the sealing cover 103 is provided with an internal thread tube 103b, the internal thread tube 103b is fixedly connected and passes through the sealing cover 103, and the internal thread tube 103b is in threaded connection with the outer wall of the locking cover 105, the locking cover 105 is protruded to form a protruding block 105a, and the outer wall of the protruding block 105a is conical. When the sealing cover 103 is rotated, the movable protruding block 105a can be pushed to be clamped into the inner wall of the sealing cover 103, and when the inner wall of the sealing cover 103 is tightly abutted, the outer wall of the sealing cover 103 is clamped and fastened on the inner wall of the fixed cylinder 101, so that loose movement between the sealing cover 103 and the fixed cylinder 101 can be prevented.

In this embodiment, the seal cover 103 is provided with a notch 103c, and the notch 103c facilitates the protruding block 105a to be clamped into the inner wall of the seal cover 103, and when the inner wall of the seal cover 103 is tightly abutted, the outer wall of the seal cover 103 is clamped and fastened with the inner wall of the fixed cylinder 101; and the inner diameter of the sealing cover 103 is smaller than the outer diameter of the protruding block 105a, so that when the protruding block 105a is screwed into the inner wall of the sealing cover 103, the outer wall of the protruding block 105a abuts against the inner wall of the sealing cover 103.

In this embodiment, specifically, the inner wall of the locking cover 105 is provided with a through hole 105b, and the inner wall of the through hole 105b is provided with a first sealing ring 105c, and the sealing performance between the outer wall of the pull rod 104 and the inner wall of the through hole 105b can be improved by the first sealing ring 105c, so that the leakage of coal dust along the outer wall of the pull rod is prevented, and the pull rod 104 passes through the through hole 105b.

In this embodiment, specifically, the bottom wall of the fixed cylinder 101 is provided with a through pipe 101b, the through pipe 101b is disposed corresponding to the through hole 102a, and the inner wall of the through pipe 101b is provided with a second sealing ring 101c, where the second sealing ring 101c can improve the tightness between the pull rod 104 and the inner wall of the through pipe 101b, and is favorable to preventing the coal dust from leaking along the outer wall of the pull rod, and the pull rod 104 passes through the through pipe 101b.

Specifically in this embodiment, the movable plate 102 is provided with a through hole 102a, the through hole 102a is convenient for air above and below the movable plate 102 to circulate, and a dust filtering net 102b is disposed in the through hole 102a, and the dust filtering net 102b can prevent coal dust from passing through the through hole 102a to cause coal dust leakage.

In this embodiment, a protruding ring 201a is disposed on the movable ring 201, a limiting groove 202a is disposed on the fixed ring 202, and the outer wall of the protruding ring 201a is rotatably and movably connected with the inner wall of the limiting groove 202 a. The protruding ring 201a can rotate in the limit groove 202a, and the cooperation between the protruding ring 201a and the limit groove 202a is beneficial to improving the stability of the movable ring 201 and the fixed ring 202 during relative rotation.

In this embodiment, an anti-slip groove 103b-1 is provided on the outer wall of the internally threaded tube 103b, the outer wall of the locking cover 105 is fixedly connected with a fixing plate 106, and the fixing plate 106 is obliquely arranged on the outer wall of the locking cover 105, a screw hole 106a is provided on the fixing plate 106, and a screw bolt 106b is screwed on the inner wall of the screw hole 106 a. By screwing the bolt 106b into the screw hole 106a, the bolt 106b abuts against the outer wall of the internally threaded tube 103b after screwing the bolt 106b, so that relative rotation between the internally threaded tube 103b and the locking cap 105 can be prevented, and looseness can be prevented.

In this embodiment, the inner wall of the fixed cylinder 101 is square, and the outer wall of the movable plate 102 is attached to the inner wall of the fixed cylinder 101. The movable plate 102 and the fixed cylinder 101 can be prevented from being rotated relative to each other.

Example 3

Referring to fig. 1 and 2, in a third embodiment of the present application, based on the previous embodiment, when the pull rod 104 moves axially, the movable plate 102 can be moved inside the cavity 101d, and when the pull rod 104 moves, the outer wall of the pull rod 104 can be protected, so that the abrasion on the pull rod 104 is reduced, and the sealability of the pull rod 104 is poor; when the pull rod 104 can do steering operation, through the cooperation between the loose collar 201 and the fixed collar 202, can play sealed effect, guarantee the leakproofness of pull rod 104 outer wall, can protect the pull rod 104 simultaneously, prevent that the wearing and tearing from appearing in pull rod 104 outer wall, lead to the leakproofness of pull rod 104 to worsen.

Through rotatory sealed lid 103, can screw in the internal thread section 101a of fixed section of thick bamboo 101 inner wall with external thread section 103a, with sealed lid 103 and fixed section of thick bamboo 101 combination together, can push away movable protruding piece 105a card and go into sealed lid 103 inner wall when rotatory sealed lid 103, when the tight sealed lid 103 inner wall of support, sealed lid 103 outer wall card fastening fixed section of thick bamboo 101 inner wall can prevent to appear loosening between sealed lid 103 and the fixed section of thick bamboo 101, through in with bolt 106b screw in screw hole 106a, after screwing bolt 105b, bolt 106b supports tightly the internal thread pipe 103b outer wall, can prevent to appear relative rotation between internal thread pipe 103b and the locking lid 105, be favorable to preventing to appear becoming flexible.

It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.

Claims (1)

1. The utility model provides a medium speed pulverizer hydraulic pressure pull rod sealing device which characterized in that: comprising the steps of (a) a step of,

the mounting assembly (100), the mounting assembly (100) comprises a fixed cylinder (101), a movable plate (102), a sealing cover (103) and a pull rod (104), the sealing cover (103) is arranged on the fixed cylinder (101), a closed cavity (101 d) is formed inside the fixed cylinder (101) and the sealing cover (103), the pull rod (104) penetrates through the movable plate (102), and the movable plate (102) is movably connected with the inner wall of the fixed cylinder (101);

the support assembly (200), the support assembly (200) comprises a movable ring (201) and a fixed ring (202), the outer wall of the fixed cylinder (101) penetrates through the movable ring (201), and two ends of the movable ring (201) are rotatably and movably connected with the fixed ring (202);

an external thread section (103 a) is arranged on the outer wall of the sealing cover (103), an internal thread section (101 a) is arranged on the inner wall of the fixed cylinder (101) corresponding to the external thread section (103 a), and the external thread section (103 a) is matched with the internal thread section (101 a);

an internal thread pipe (103 b) is arranged on the sealing cover (103), the internal thread pipe (103 b) is in threaded connection with the outer wall of the locking cover (105), a protruding block (105 a) is formed on the locking cover (105) in a protruding mode, and the outer wall of the protruding block (105 a) is conical;

the sealing cover (103) is provided with a notch (103 c), and the inner diameter of the sealing cover (103) is smaller than the outer diameter of the protruding block (105 a);

the inner wall of the locking cover (105) is provided with a through hole (105 b), the inner wall of the through hole (105 b) is provided with a first sealing ring (105 c), and the pull rod (104) penetrates through the through hole (105 b);

a penetrating pipe (101 b) is arranged on the bottom wall of the fixed cylinder (101), the penetrating pipe (101 b) is arranged corresponding to the penetrating hole (102 a), a second sealing ring (101 c) is arranged on the inner wall of the penetrating pipe (101 b), and the pull rod (104) penetrates through the penetrating pipe (101 b);

the movable plate (102) is provided with a through hole (102 a), and a dust filtering net (102 b) is arranged in the through hole (102 a);

a protruding ring (201 a) is arranged on the movable ring (201), a limiting groove (202 a) is arranged on the fixed ring (202), and the outer wall of the protruding ring (201 a) is rotatably and movably connected with the inner wall of the limiting groove (202 a);

an anti-skid groove (103 b-1) is formed in the outer wall of the internal thread pipe (103 b), the outer wall of the locking cover (105) is fixedly connected with a fixing plate (106), the fixing plate (106) is obliquely arranged on the outer wall of the locking cover (105), a screw hole (106 a) is formed in the fixing plate (106), and a bolt (106 b) is connected with the inner wall of the screw hole (106 a) through threads;

the inner wall of the fixed cylinder (101) is square, and the outer wall of the movable plate (102) is attached to the inner wall of the fixed cylinder (101).