Loading pull rod sealing device of medium-speed coal mill

Abstract

The utility model discloses a sealing device for a loading pull rod of a medium-speed coal mill, which comprises a pull rod, a first sealing mechanism and a second sealing mechanism, the first sealing mechanism is sleeved on the pull rod, the second sealing mechanism is also sleeved on the pull rod and is positioned on the same side with the first sealing mechanism, and the first sealing mechanism comprises a sealing assembly and a seat body assembly. The retarding assembly is arranged between the sealing assembly and the seat body assembly and is used for reducing the moving speed of the pull rod and the sealing assembly in the radial direction when the pull rod shakes in the radial direction. According to the utility model, through the arrangement of the retarding assembly, the pulling rod is driven to shake by fierce shaking generated when the coal mill grinds large coal briquettes, and the retarding assembly reduces the moving speed of the pulling rod and the sealing assembly in the radial direction when the pulling rod slides in the radial direction, so that the pulling rod and the sealing assembly are not prone to violently colliding with the seat body assembly; therefore, abrasion and even breakage of the pull rod and the sealing assembly are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mill equipment, in particular to a loading rod sealing device for a medium-speed coal mill. Background Art

[0002] The working principle of the pull rod of the medium-speed coal mill is that the motor drives the grinding disc to rotate through the reducer. The rotation of the grinding disc drives the three grinding rollers at an angle of 120° to each other to rotate passively. They are relatively moving grinding parts. Under the action of hydraulic pressure, the grinding parts squeeze and grind the raw coal between them and finally crush them into coal powder. The crushed coal powder is thrown into the wind ring chamber through the rotation of the grinding parts. The hot primary air flowing through the wind ring chamber brings these coal powders to the coal powder separator at the top of the medium-speed mill. The over-coarse and unqualified coal powder is separated and re-ground. In the process of coal grinding, a small amount of stones and debris entrained in the raw coal are also thrown into the wind ring chamber. They fall into the slag discharge car and are discharged regularly.

[0003] In the prior art, tie rods and sealing structures are used in conjunction to avoid problems of air leakage and powder leakage. However, the coal mill may encounter the situation of grinding large coal blocks during long-term operation. At this time, the coal mill may vibrate violently, which may cause the tie rods or sealing structures to wear easily. In more serious cases, the tie rods or sealing structures may break, seriously affecting the normal operation of the equipment. If the tie rods and sealing structures are to be replaced, the operation will be troublesome and will incur high costs. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings and provide a loading rod sealing device for a medium-speed coal mill.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A medium-speed coal mill loading rod sealing device comprises a rod, a first sealing mechanism sleeved on the rod, and a second sealing mechanism sleeved on the rod and located on the same side as the first sealing mechanism, wherein the first sealing mechanism comprises a sealing assembly and a seat assembly, and further comprises:

[0007] The deceleration assembly is arranged between the sealing assembly and the seat assembly and is used to reduce the moving speed of the pull rod and the sealing assembly in the radial direction when the pull rod shakes radially.

[0008] Preferably, the sealing assembly comprises:

[0009] A first sealing core, which is set in a cone shape and sleeved on the pull rod;

[0010] The conical sleeve is arranged on the first sealing core through a carbon ring sealing sleeve and has a clearance groove at the bottom for inserting the seat body component.

[0011] Preferably, the seat assembly comprises:

[0012] A protective cover, which is sleeved on the conical sleeve and extends into the conical sleeve;

[0013] A sealing seat, which is arranged at the lower end of the protective cover and connected to the coal mill casing;

[0014] The protective cover and the sealing seat are both provided with a first threaded hole for bolt connection.

[0015] Preferably, the mitigation component comprises:

[0016] An extrusion plate, hinged to the conical sleeve;

[0017] A sleeve plate, slidably and hingedly connected to one side of the protective cover;

[0018] An extrusion rod connected between the extrusion plate and the sleeve plate;

[0019] When the pull rod and the sealing assembly move radially, the deceleration assembly is driven to rotate at the hinge point of the extrusion plate.

[0020] Preferably, the protective cover is connected with a sliding member for the sleeve plate to slide;

[0021] The sliding member comprises:

[0022] A fixing plate connected to the protective cover;

[0023] A slider, slidably disposed on the fixed plate and hinged to the sleeve plate, the fixed plate being provided with a groove for the slider to slide;

[0024] A connecting rod is connected in the groove and the sliding block is slidably sleeved on the connecting rod.

[0025] Preferably, a sliding groove for the extrusion rod to slide is provided on one side of the sleeve plate close to the extrusion rod;

[0026] A spring is sleeved on the extrusion rod, one end of the spring is connected to the extrusion plate, and the other end of the spring is connected to the sleeve plate.

[0027] Preferably, the second sealing mechanism comprises:

[0028] A second sealing core is sleeved on the pull rod;

[0029] A sealing shell is sleeved on the second sealing core and an upper end of the sealing shell abuts against an upper end of the second sealing core;

[0030] A gasket, which is disposed at the lower end of the sealing housing and has an upper end abutting against the lower end of the second sealing core;

[0031] A baffle plate, disposed at the lower end of the pad;

[0032] The sealing shell, the backing plate and the baffle are all provided with second threaded holes for threaded connection.

[0033] Compared with the prior art, the beneficial effects of the utility model are:

[0034] The utility model provides a deceleration component, and the violent shaking caused by the coal mill grinding large coal blocks drives the pull rod to shake. When the pull rod slides radially, the deceleration component reduces the moving speed of the pull rod and the sealing component in the radial direction, making it difficult for the pull rod and the sealing component to collide violently with the seat body component, thereby avoiding wear or even breakage of the pull rod and the sealing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0036] Figure 1 It is a cross-sectional view of the utility model;

[0037] Figure 2 For this utility model Figure 1 The enlarged view of point A in the middle;

[0038] Figure 3 It is a structural schematic diagram of the sealing component in the utility model;

[0039] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0040] In the figure:

[0041] 1. Pull rod; 2. First sealing core; 3. Conical sleeve; 4. Protective cover; 5. Sealing seat; 6. Second sealing core; 7. Sealing shell; 8. Backing plate; 9. Baffle;

[0042] 101, extrusion plate; 102, extrusion rod; 103, socket plate; 1031, slide groove; 104, fixing plate; 105, groove; 106, connecting rod; 107, slider; 108, spring. DETAILED DESCRIPTION

[0043] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0044] See also Figure 1-4 A medium-speed coal mill loading rod sealing device comprises a rod 1, a first sealing mechanism sleeved on the rod 1, and a second sealing mechanism sleeved on the rod 1 and located on the same side as the first sealing mechanism, wherein the first sealing mechanism comprises a sealing assembly and a seat assembly, and further comprises:

[0045] The deceleration assembly is arranged between the sealing assembly and the seat assembly and is used to reduce the moving speed of the pull rod 1 and the sealing assembly in the radial direction when the pull rod 1 shakes radially.

[0046] With this design, the first sealing mechanism and the second sealing mechanism play a sealing role; the violent shaking generated by the coal mill grinding large coal blocks causes the pull rod 1 to shake, and when the pull rod 1 slides radially, the movement speed of the pull rod 1 and the sealing assembly in the radial direction is reduced, making it difficult for the pull rod 1 and the sealing assembly to collide violently with the seat assembly, thereby avoiding wear or even breakage of the pull rod 1 and the sealing assembly.

[0047] In one embodiment, the sealing assembly comprises:

[0048] The first sealing core 2 is set in a cone shape and sleeved on the pull rod 1;

[0049] The conical sleeve 3 is arranged on the first sealing core 2 through a carbon ring sealing sleeve and has a clearance groove at the bottom for inserting the seat body component.

[0050] In this way, the conical sleeve 3 is sleeved on the first sealing core 2 .

[0051] In one embodiment, the seat assembly includes:

[0052] A protective cover 4 is sleeved on the conical sleeve 3 and extends into the conical sleeve 3;

[0053] A sealing seat 5 is arranged at the lower end of the protective cover 4 and connected to the coal mill casing;

[0054] The protective cover 4 and the sealing seat 5 are both provided with first threaded holes for bolt connection.

[0055] In this design, the protection cover 4 and the sealing seat 5 are connected by bolts, and both the protection cover 4 and the sealing seat 5 abut against the conical sleeve 3.

[0056] In one embodiment, the mitigation component comprises:

[0057] The extrusion plate 101 is hinged on the conical sleeve 3;

[0058] A sleeve plate 103 is slidably and hingedly connected to one side of the protective cover 4;

[0059] The extrusion rod 102 is connected between the extrusion plate 101 and the sleeve plate 103;

[0060] When the pull rod 1 and the sealing assembly move radially, the deceleration assembly is driven to rotate the hinge point of the extrusion plate 101 .

[0061] In this way, the extrusion rod 102 is fixedly connected to the extrusion plate 101 .

[0062] In one embodiment, the protective cover 4 is connected with a sliding member for the sleeve plate 103 to slide;

[0063] The slides include:

[0064] A fixing plate 104 connected to the protective cover 4;

[0065] A slider 107 is slidably disposed on the fixed plate 104 and is hinged to the sleeve plate 103. The fixed plate 104 is provided with a groove 105 for the slider 107 to slide;

[0066] The connecting rod 106 is connected in the groove 105 and the slider 107 is slidably mounted on the connecting rod 106 .

[0067] In this design, the fixing plate 104 is fixedly connected to the protective cover 4 ; and the connecting rod 106 is fixedly connected to the groove 105 .

[0068] In one embodiment, a side of the sleeve plate 103 close to the extrusion rod 102 is provided with a slide groove 1031 for the extrusion rod 102 to slide;

[0069] A spring 108 is sleeved on the extrusion rod 102 , one end of the spring 108 is connected to the extrusion plate 101 , and the other end is connected to the sleeve plate 103 .

[0070] In this design, the deceleration components are set into two groups, which are respectively located on both sides of the pull rod 1; the original state of the socket plate 103 is: the end close to the extrusion plate 101 is higher than the end close to the fixed plate 104, and is inclined; when the pull rod 1 moves toward the deceleration component on one side, the spring 108 is compressed, and the slider 107 on that side moves downward, leaving space for the radial movement of the pull rod 1. At this time, the spring 108 on the other side is stretched, and the deceleration component reduces the movement speed of the pull rod 1 and the sealing component in the radial direction.

[0071] In one embodiment, the second sealing mechanism comprises:

[0072] The second sealing core 6 is sleeved on the pull rod 1;

[0073] The sealing housing 7 is sleeved on the second sealing core 6 and the upper end thereof abuts against the upper end of the second sealing core 6;

[0074] A gasket 8 is provided at the lower end of the sealing housing 7 and the upper end of the gasket 8 abuts against the lower end of the second sealing core 6;

[0075] A baffle plate 9 is provided at the lower end of the pad 8;

[0076] The sealing housing 7, the backing plate 8 and the baffle plate 9 are all provided with second threaded holes for threaded connection.

[0077] In this design, the sealing housing 7, the backing plate 8 and the baffle plate 9 are connected by bolts.

[0078] Working principle: When in use, the violent shaking caused by the coal mill grinding large coal blocks causes the pull rod 1 to shake. When the pull rod 1 slides radially, the radial movement speed of the deceleration component is reduced, making it difficult for the pull rod 1 and the sealing assembly to collide violently with the seat assembly, thereby avoiding wear or even breakage of the pull rod 1 and the sealing assembly.

[0079] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0080] In addition, if there are descriptions of "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A medium-speed coal mill loading rod sealing device, characterized in that: The invention comprises a pull rod (1), a first sealing mechanism sleeved on the pull rod (1), and a second sealing mechanism sleeved on the pull rod (1) and located on the same side as the first sealing mechanism, wherein the first sealing mechanism comprises a sealing assembly and a seat assembly, and further comprises: A deceleration component is arranged between the sealing component and the seat body component and is used to reduce the moving speed of the pull rod (1) and the sealing component in the radial direction when the pull rod (1) shakes radially.

2. The medium speed coal mill loading rod sealing device according to claim 1, characterized in that: The sealing assembly comprises: A first sealing core (2) is configured in a cone shape and sleeved on the pull rod (1); The conical sleeve (3) is arranged on the first sealing core (2) via a carbon ring sealing sleeve and has a clearance groove at the bottom for inserting the seat body component.

3. The medium speed coal mill loading rod sealing device according to claim 2, characterized in that: The seat assembly comprises: A protective cover (4) is sleeved on the conical sleeve (3) and extends into the conical sleeve (3); A sealing seat (5) is arranged at the lower end of the protective cover (4) and connected to the coal mill casing; The protective cover (4) and the sealing seat (5) are both provided with a first threaded hole for bolt connection.

4. The medium speed coal mill loading rod sealing device according to claim 3 is characterized in that: The mitigation components include: An extrusion plate (101) is hinged to the conical sleeve (3); A sleeve plate (103) is slidably and hingedly connected to one side of the protective cover (4); An extrusion rod (102) connected between the extrusion plate (101) and the sleeve plate (103); When the pull rod (1) and the sealing assembly move radially, they drive the deceleration assembly to rotate at the hinge point of the extrusion plate (101).

5. The medium speed coal mill loading rod sealing device according to claim 4, characterized in that: The protective cover (4) is connected to a sliding member for the sleeve plate (103) to slide; The sliding member comprises: A fixing plate (104) connected to the protective cover (4); A slider (107) is slidably disposed on the fixed plate (104) and is hinged to the sleeve plate (103); the fixed plate (104) is provided with a groove (105) for the slider (107) to slide; A connecting rod (106) is connected in the groove (105) and the sliding block (107) is slidably mounted on the connecting rod (106).

6. The medium speed coal mill loading rod sealing device according to claim 4, characterized in that: A sliding groove (1031) for the extrusion rod (102) to slide is provided on one side of the sleeve plate (103) close to the extrusion rod (102); The extrusion rod (102) is sleeved with a spring (108), one end of the spring (108) is connected to the extrusion plate (101), and the other end is connected to the sleeve plate (103).

7. The medium speed coal mill loading rod sealing device according to claim 1, characterized in that: The second sealing mechanism comprises: A second sealing core (6) is sleeved on the pull rod (1); A sealing shell (7) is sleeved on the second sealing core (6) and the upper end of the sealing shell abuts against the upper end of the second sealing core (6); A gasket (8), which is arranged at the lower end of the sealing housing (7) and has an upper end abutting against the lower end of the second sealing core (6); A baffle (9) is arranged at the lower end of the pad (8); The sealing housing (7), the backing plate (8) and the baffle plate (9) are all provided with second threaded holes for threaded connection.

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