Pull rod type mechanical sealing device

Abstract

The embodiment of the utility model discloses a pull rod type mechanical sealing device, which relates to the technical field of mechanical sealing, and comprises a pull rod main body, the pull rod main body is arranged in a grinding chamber and a sealing air chamber in a penetrating manner, and the grinding chamber and the sealing air chamber are separated by a partition plate; and the pull rod body is arranged in an annular through hole preset in the partition plate in a penetrating mode, a flexible corrugated sealing pipe is arranged in the grinding chamber, the upper end of the flexible corrugated sealing pipe is fixedly connected with an upper mounting block, and the lower end of the flexible corrugated sealing pipe is fixedly connected with a lower mounting block. The upper mounting block is shifted, the lower mounting block is shifted synchronously under the driving of the linkage assembly, the upper mounting block, the lower mounting block, the fixing ring block and the threaded groove formed in the partition plate achieve separation movement at the moment, then the whole flexible corrugated sealing pipe can be taken down and replaced conveniently, replacement operation can be achieved through one-time operation, operation is convenient and fast, and the working efficiency is improved. And maintenance time is saved.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of mechanical seals, and in particular to a pull rod type mechanical seal device. Background Art

[0002] The tie rod seal is one of the most important sealing components in the coal mill. If the seal fails, problems such as powder leakage and water seepage will occur. Usually, the reason for the failure of the seal is that the seal seat is worn or the hardness is reduced, resulting in insufficient sealing effect.

[0003] The existing Chinese patent authorization publication number is CN106812949A, which relates to a coal mill corrugated tie rod sealing device, which is arranged between the upper tie rod and the grinding chamber, and the grinding chamber has a through hole for passing the upper tie rod and a support for supporting the upper tie rod. It is characterized in that the coal mill corrugated tie rod sealing device is a truncated cone-shaped flexible corrugated sealing tube, the upper part of the flexible corrugated sealing tube is fixed to the outer wall of the upper tie rod by a clamp, and the lower part of the flexible corrugated sealing tube is fixed to the support by a pressure plate. The beneficial effects of the present invention are: achieving a gapless combination of the tie rod (dynamic) and the base (static), and making the upper tie rod and the sealing device move synchronously without generating friction, which completely solves the problem of wear of the sealing device and the upper tie rod; the material of the new sealing body prolongs the service life of the sealing body; it is simple to install and realizes the reuse of old items; the elimination of the tie rod sealing wind and the upper tie rod lower sealing device effectively reduces the power consumption and spare parts cost of the sealing fan.

[0004] The above-mentioned tie rod type mechanical seal device has the following problems when in use: when in use, the above-mentioned tie rod seal device requires two steps to remove and replace the sealing tube, which is inconvenient and takes a long time to remove and replace the sealing tube.

[0005] Therefore, it is necessary to invent a pull rod type mechanical sealing device to solve the above problems. Utility Model Content

[0006] To this end, an embodiment of the present invention provides a tie rod type mechanical seal device to solve the problem in the prior art that the tie rod seal device requires two steps to replace the sealing tube, which results in a long time required for replacing the sealing tube.

[0007] In order to achieve the above-mentioned purpose, the embodiment of the present invention provides the following technical solutions: a pull rod type mechanical sealing device, comprising a pull rod body, wherein the pull rod body is arranged through the interior of a grinding chamber and a sealed air chamber, and the grinding chamber and the sealed air chamber are separated by a partition plate, and the pull rod body is arranged through an annular through hole preset in the partition plate, a flexible corrugated sealing tube is provided in the interior of the grinding chamber, and the upper end of the flexible corrugated sealing tube is fixedly connected to an upper mounting block, and the lower end of the flexible corrugated sealing tube is fixedly connected to a lower mounting block, and the inner ring of the upper mounting block is provided with a first thread, and the outer ring of the lower mounting block is provided with a second thread, and the first thread and the second thread are respectively threadedly connected to the thread groove provided on the outer ring of the fixed ring block fixedly sleeved on the outer wall of the pull rod body and the thread groove preset in the partition plate; and further comprising:

[0008] The linkage assembly is provided with a notch inside the upper mounting block and the lower mounting block, and the notch is movably provided with a sliding long rod 1 and a long rod 2 through a connecting cross bar, so as to facilitate the synchronous rotation of the lower mounting block while rotating the upper mounting block.

[0009] Furthermore, in the above technical solution, the outer ring diameter of the upper mounting block is smaller than the outer ring diameter of the lower mounting block, and the upper mounting block and the lower mounting block are coaxially arranged, ensuring that it is more convenient to remove the flexible corrugated sealing tube.

[0010] Furthermore, in the above technical solution, the outer ring diameter of the fixing ring block is also smaller than the inner ring diameter of the lower mounting block, so as to facilitate the subsequent removal of the flexible corrugated sealing tube.

[0011] Furthermore, in the above technical solution, the thread direction of thread one and thread two is the same, and the number of spiral coils of thread one and thread two is the same, so that when the upper mounting block is turned, the lower mounting block is synchronously driven to rotate, making it convenient for the upper and lower mounting blocks to synchronously disengage from the corresponding mounting thread grooves.

[0012] Furthermore, in the above technical solution, the two groups of notches located inside the upper mounting block and the lower mounting block are positioned opposite to each other, and the two groups of notches located inside the upper mounting block and the lower mounting block are staggered, and the inclination angle between the two groups of notches is the same as the inclination of the side of the conical flexible corrugated sealing tube, so that the transmission action of the linkage assembly enables the upper and lower mounting blocks to move synchronously.

[0013] Furthermore, in the above technical solution, the two ends of the connecting cross bar are fixedly connected to the inner wall of the notch, and the connecting cross bar can pass through the ends of long rod one and long rod two, and the connecting cross bar and the through-openings reserved in the ends of long rod one and long rod two are rotatably connected through bearings, so that linkage can be achieved regardless of the size of the distance between the upper and lower mounting blocks.

[0014] Furthermore, in the above technical solution, the outer ring diameter of the long rod one is slightly larger than the outer ring diameter of the long rod two, and the long rod one and the long rod two are arranged obliquely, so that the long rods cooperate with the conical flexible corrugated sealing tube, ensuring that the setting of the long rods does not affect the subsequent use of the flexible corrugated sealing tube.

[0015] Furthermore, in the above technical solution, an open columnar groove is provided inside the second long rod, and the inner wall of the groove is in contact with the outer wall of the first long rod to realize sliding connection, so that linkage can be realized regardless of the size of the distance between the upper and lower mounting blocks.

[0016] The embodiment of the utility model has the following advantages:

[0017] The utility model shifts the upper mounting block, and under the guidance of the linkage component, the lower mounting block is shifted synchronously. At this time, the upper and lower mounting blocks and the threaded grooves provided in the fixed ring block and the spacer plate realize separation movement, thereby facilitating the removal and replacement of the entire flexible corrugated sealing tube. The replacement operation can be completed in one operation, which is convenient and quick to operate and saves maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0020] Figure 1 This is a schematic plan view of the overall structure of the utility model;

[0021] Figure 2 This is a three-dimensional diagram of the internal structure of the overall structure of the utility model (partially cut away);

[0022] Figure 3 This is a three-dimensional diagram of the internal structure of the flexible corrugated sealing tube (partially cut away) of the present invention;

[0023] Figure 4 For this utility model Figure 3 Schematic diagram of the structure magnification effect at point A in the middle.

[0024] In the figure: 1. Pull rod body; 2. Grinding chamber; 3. Sealed air chamber; 4. Annular through hole; 5. Flexible corrugated sealing tube; 6. Upper mounting block; 7. Lower mounting block; 8. Fixed ring block; 9. Thread 1; 10. Thread 2; 11. Linkage assembly; 111. Notch; 112. Connecting cross bar; 113. Long rod 1; 114. Long rod 2; 12. Spacer. DETAILED DESCRIPTION

[0025] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0026] The utility model provides Figure 1-4 The illustrated drawing rod type mechanical sealing device includes a drawing rod body 1, which is provided through the interior of a grinding chamber 2 and a sealed air chamber 3, and the grinding chamber 2 and the sealed air chamber 3 are separated by a partition plate 12, and the drawing rod body 1 is provided through an annular through hole 4 preset in the partition plate 12, a flexible corrugated sealing tube 5 is provided in the grinding chamber 2, and the upper end of the flexible corrugated sealing tube 5 is fixedly connected to an upper mounting block 6, and the lower end of the flexible corrugated sealing tube 5 is fixedly connected to a lower mounting block 7, and the inner ring of the upper mounting block 6 is provided with a first thread 9, and the outer ring of the lower mounting block 7 is provided with a second thread 10, and the first thread 9 and the second thread 10 are respectively threadedly connected to the thread groove provided on the outer ring of a fixed ring block 8 fixedly sleeved on the outer wall of the drawing rod body 1 and the thread groove preset in the partition plate 12; and further includes:

[0027] The linkage assembly 11, the upper mounting block 6 and the lower mounting block 7 are all provided with a notch 111, and the notch 111 is movably installed with a sliding long rod 113 and a long rod 2 114 through a connecting cross bar 112, so as to facilitate the synchronous rotation of the lower mounting block 7 while rotating the upper mounting block 6.

[0028] In order to ensure the convenience of removing the flexible corrugated sealing tube 5, the outer ring diameter of the upper mounting block 6 is smaller than the outer ring diameter of the lower mounting block 7, and the upper mounting block 6 and the lower mounting block 7 are arranged coaxially. The outer ring diameter of the fixing ring block 8 is also smaller than the inner ring diameter of the lower mounting block 7. This makes it convenient for the upper mounting block 6 and the lower mounting block 7 to be twisted later, so that the two mounting blocks can leave the corresponding threaded grooves synchronously, and it is also convenient for the lower mounting block 7 to pass through the fixing ring block 8 and remove the flexible corrugated sealing tube 5.

[0029] In order to facilitate the synchronous separation of the upper and lower mounting blocks from the corresponding mounting thread grooves, the thread one 9 and the thread two 10 have the same thread direction, and the thread one 9 and the thread two 10 have the same number of spiral coils. In this way, after the upper mounting block 6 is dialed and the lower mounting block 7 is synchronously driven to rotate the same number of circles under the transmission of the linkage component 11, the upper mounting block 6 and the lower mounting block 7 are synchronously rotated to leave the corresponding thread grooves.

[0030] To ensure that the upper and lower mounting blocks can rotate synchronously, the two groups of notches 111 located inside the upper mounting block 6 and the lower mounting block 7 are positioned relative to each other, and the two groups of notches 111 located inside the upper mounting block 6 and the lower mounting block 7 are staggered. The inclination angle between the two groups of notches 111 is the same as the inclination of the side of the tapered flexible corrugated sealing tube 5. The two ends of the connecting cross bar 112 are fixedly connected to the inner walls of the notches 111, and the connecting cross bar 112 can pass through the ends of the long rod 113 and the long rod 2 114. The connecting cross bar 112 and the through-holes reserved in the ends of the long rod 113 and the long rod 2 114 are rotatably connected through bearings. In this way, when the size of the gap between the upper and lower mounting blocks changes, the movably arranged long rod 113 and the long rod 2 114 can also realize the transmission effect so that the upper mounting block 6 and the lower mounting block 7 can rotate synchronously.

[0031] In order to ensure the transmission function of long rod 113 and long rod 2 114, the outer ring diameter of long rod 113 is slightly larger than the outer ring diameter of long rod 2 114, and long rod 113 and long rod 2 114 are arranged obliquely, so that the long rod cooperates with the tapered flexible corrugated sealing tube 5, ensuring that the setting of the long rod does not affect the subsequent use of the flexible corrugated sealing tube 5. An open columnar groove is provided inside long rod 2 114, and the inner wall of the groove is in contact with the outer wall of long rod 113 to achieve a sliding connection. In this way, no matter how the distance between the upper and lower mounting blocks changes, the transmission efficiency of the sliding long rod 113 and long rod 2 114 remains unchanged.

[0032] By moving the upper mounting block 6, the lower mounting block 7 is moved synchronously under the guidance of the linkage assembly 11. At this time, the upper and lower mounting blocks and the threaded grooves set in the fixing ring block 8 and the spacer plate 12 realize torsional separation movement, thereby facilitating the removal and replacement of the entire flexible corrugated sealing tube 5, and the replacement operation can be completed in one operation.

[0033] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A tie rod type mechanical sealing device, comprising a tie rod body (1), characterized in that: The pull rod body (1) is arranged through the inside of the grinding chamber (2) and the sealed air chamber (3), and the grinding chamber (2) and the sealed air chamber (3) are separated by a partition plate (12), and the pull rod body (1) is arranged through the annular through hole (4) preset inside the partition plate (12), and a flexible corrugated sealing tube (5) is arranged inside the grinding chamber (2), and the upper end of the flexible corrugated sealing tube (5) is fixedly connected to the upper mounting block (6), and the lower end of the flexible corrugated sealing tube (5) is fixedly connected to the lower mounting block (7), and the inner ring of the upper mounting block (6) is provided with a first thread (9), and the outer ring of the lower mounting block (7) is provided with a second thread (10), and the first thread (9) and the second thread (10) are respectively threadedly connected with the thread groove provided on the outer ring of the fixed ring block (8) fixedly sleeved on the outer wall of the pull rod body (1) and the thread groove preset inside the partition plate (12); and it also includes: The linkage assembly (11) is provided with a notch (111) inside the upper mounting block (6) and the lower mounting block (7), and a sliding long rod (113) and a sliding long rod (114) are movably installed inside the notch (111) via a connecting cross bar (112).

2. A tie rod type mechanical seal device according to claim 1, characterized in that: The outer ring diameter of the upper mounting block (6) is smaller than the outer ring diameter of the lower mounting block (7), and the upper mounting block (6) and the lower mounting block (7) are coaxially arranged.

3. A tie rod type mechanical seal device according to claim 1, characterized in that: The outer ring diameter of the fixed ring block (8) is also smaller than the inner ring diameter of the lower mounting block (7).

4. A tie rod type mechanical seal device according to claim 1, characterized in that: The thread one (9) and the thread two (10) have the same thread direction, and the thread one (9) and the thread two (10) have the same number of spiral coils.

5. The tie rod type mechanical seal device according to claim 1, characterized in that: The opening positions of the two groups of notches (111) located inside the upper mounting block (6) and the lower mounting block (7) are opposite to each other, and the two groups of notches (111) located inside the upper mounting block (6) and the lower mounting block (7) are staggered, and the inclination angle between the two groups of notches (111) is the same as the inclination of the side of the tapered flexible corrugated sealing tube (5).

6. The tie rod type mechanical seal device according to claim 1, characterized in that: The two ends of the connecting cross bar (112) are fixedly connected to the inner wall of the notch (111), and the connecting cross bar (112) can pass through the ends of the long rod (113) and the long rod (114), and the connecting cross bar (112) and the through openings reserved in the ends of the long rod (113) and the long rod (114) are rotatably connected through bearings.

7. The tie rod type mechanical seal device according to claim 1, characterized in that: The outer diameter of the long rod 1 (113) is slightly larger than the outer diameter of the long rod 2 (114), and the long rod 1 (113) and the long rod 2 (114) are arranged obliquely.

8. The tie rod type mechanical seal device according to claim 1, characterized in that: An open columnar groove is provided inside the second long rod (114), and the inner wall of the groove is in contact with the outer wall of the first long rod (113) to achieve a sliding connection.

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