Packing sealing structure

Abstract

The utility model discloses a packing sealing structure. The packing sealing structure comprises a first sealing assembly and a second sealing assembly, the first sealing assembly comprises a first packing pressing ring, a cover plate, first packing and a pressing ring, the first packing pressing ring is constructed to be circumferentially fixed to the inner wall of a shell to be sealed, the cover plate is arranged on the first packing pressing ring and constructed to be used for forming a gap with the inner wall of the shell, and the first packing is arranged on the cover plate; the first filler is configured to be filled in the gap, and the pressing ring is circumferentially and detachably arranged on the cover plate and configured to be used for pressing the first filler in the gap; and the second sealing assembly comprises a stuffing box, the stuffing box penetrates through the cover plate and is connected to the cover plate, a second filler and a second filler pressing ring are installed in the stuffing box, and the second filler pressing ring is detachably located on the top of the second filler to press the second filler. According to the packing sealing structure, packing is convenient to disassemble and assemble, and meanwhile the sealing effect is enhanced.

Description

Technical Field

[0001] The utility model generally relates to the technical field of pressure vessel sealing, and more specifically, relates to a packing sealing structure. Background Art

[0002] Sealing structures are often used in pressure vessels. The commonly used packing sealing structures have certain limitations on small-diameter tubular equipment or special equipment. They are inconvenient to disassemble or the sealing effect is poor.

[0003] Therefore, how to provide a packing sealing structure that is convenient for disassembly and assembly and has a good sealing effect is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, the utility model provides a packing sealing structure, in which the packings are installed in a detachable structure, so that the packings are easy to disassemble and assemble; at the same time, the packing sealing structure is provided with a pressing component to press the packings, thereby enhancing the sealing effect of the packings.

[0005] To achieve the above-mentioned purpose, the utility model provides a packing sealing structure, comprising: a first sealing assembly, the first sealing assembly comprising a first packing pressure ring, a cover plate, a first packing and a pressure ring, wherein the first packing pressure ring is configured to be circumferentially fixed to the inner wall of the shell to be sealed, the cover plate is arranged on the first packing pressure ring and is configured to form a gap with the inner wall of the shell, the first packing is configured to fill in the gap, and the pressure ring is circumferentially and detachably arranged on the cover plate and is configured to press the first packing in the gap; and a second sealing assembly, the second sealing assembly comprises a stuffing box, the stuffing box passes through the cover plate and is connected to the cover plate, a second packing and a second packing pressure ring are installed in the stuffing box, wherein the second packing is configured to seal the outer wall of the intermediate pipe in the shell for connecting to an external pipe, and the second packing pressure ring is detachably located on the top of the second packing to press the second packing.

[0006] Optionally, the first sealing assembly also includes a pressure rod, an annular plate and a fastener, wherein: the fastener is configured to pass through the annular plate and be stuck in a groove in the inner wall of the shell, and the pressure rod passes through the annular plate and presses against the pressure ring along the direction in which the pressure ring presses the first filler.

[0007] Optionally, there are multiple pressure rods, and the multiple pressure rods are evenly arranged along the circumference of the annular plate.

[0008] Optionally, the pressure rod is a bolt.

[0009] Optionally, the annular plate is provided with a threaded hole for the pressure rod to pass through, and the inner wall of the threaded hole is threadably matched with the outer wall of the pressure rod.

[0010] Optionally, the fastener is a screw.

[0011] Optionally, the pressure ring comprises a transverse portion and a longitudinal portion that are integrally formed, wherein the transverse portion is located on the cover plate, and the longitudinal portion extends into the gap.

[0012] Optionally, a clamping nut located on the top of the second packing pressure ring is also installed in the stuffing box, and the outer wall of the clamping nut is threadably matched with the inner wall of the stuffing box.

[0013] Optionally, a packing retaining ring is further installed in the stuffing box, and the packing retaining ring is located at the bottom of the second packing.

[0014] Optionally, the first filler and the second filler are both graphite braided fillers.

[0015] Compared with the prior art, the packing sealing structure provided by the utility model has the following beneficial effects:

[0016] (1) The packing sealing structure provided by the utility model has a packing pressure ring and a second packing pressure ring and other components that are detachable, so that the first packing and the second packing are easy to disassemble and assemble; at the same time, the packing sealing structure is additionally provided with a pressure ring and a second packing pressure ring to press the first packing and the second packing respectively, thereby greatly enhancing the sealing effect of the packing on the inner wall of the shell and the outer wall of the intermediate tube.

[0017] (2) The packing sealing structure provided by the utility model further adds a pressure rod detachably through the annular plate and the fastener, and the pressure rod presses on the pressure ring to apply pressure to the pressure ring and then to the first packing, thereby further enhancing the sealing effect of the first packing on the inner wall of the shell.

[0018] (3) The packing sealing structure provided by the utility model is provided with a removable clamping nut in the packing box, so that the second packing pressure ring and the second packing can be pressurized by screwing down the clamping nut, thereby further enhancing the sealing effect of the second packing on the outer wall of the intermediate tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the implementation of the present invention will be further illustrated and described based on the following drawings, which are only used to more conveniently and specifically describe the implementation of the present invention rather than to limit the present invention. In the drawings:

[0020] Figure 1is a schematic diagram of a packing sealing structure provided according to an exemplary embodiment of the utility model and an integral structure formed by the packing sealing structure, the housing to be sealed and the intermediate pipe;

[0021] Figure 2 yes Figure 1 An enlarged view of part I in FIG.

[0022] Figure 3 yes Figure 1 An enlarged view of part II in FIG.

[0023] Figure 4 is a schematic diagram of a stuffing box provided according to an exemplary embodiment of the utility model; and

[0024] Figure 5 It is a schematic diagram of a compression nut provided according to an exemplary embodiment of the utility model.

[0025] In the figure: 1, pressure rod; 2, annular plate; 3, fastener; 4, pressure ring; 5, cover plate; 6, first packing; 7, first packing pressure ring; 8, stuffing box; 9, clamping nut; 10, second packing pressure ring; 11, second packing; 12, packing retaining ring; 13, intermediate pipe; 14, shell. DETAILED DESCRIPTION

[0026] The utility model provides a packing sealing structure, in which packings are all installed in a detachable structure, so that the packings are easy to disassemble and assemble; at the same time, the packing sealing structure is provided with a pressing component to press the packings, thereby enhancing the sealing effect of the packings.

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the specific embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. These embodiments are provided by way of example only. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative work are also within the scope of protection claimed by the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0029] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0030] refer to Figures 1 to 5, an embodiment of the utility model provides a packing sealing structure, including a first sealing assembly and a second sealing assembly. The first sealing assembly includes a first packing pressing ring 7, a cover plate 5, a first packing 6 and a pressing ring 4; wherein the first packing pressing ring 7 is configured to be circumferentially fixed to the inner wall of the housing 14 to be sealed, for example, the bottom of the first packing pressing ring 7 is circumferentially welded to the inner wall of the housing 14 to be sealed; the cover plate 5 is arranged on the first packing pressing ring 7 and is configured to form a gap with the inner wall of the housing 14, and the first packing 6 is configured to be filled in the gap; and the pressing ring 4 is circumferentially and detachably arranged on the cover plate 5 and is configured to press the first packing 6 in the gap. The second sealing assembly includes a stuffing box 8. The stuffing box 8 passes through the cover plate 5 and is connected to the cover plate 5, for example, the flange on the upper part of the stuffing box 8 is welded to the cover plate 5. The second packing 11 and the second packing pressing ring 10 are installed in the stuffing box 8, wherein the second packing 11 is configured to seal the outer wall of the intermediate pipe 13 in the housing 14 for communicating with the external pipe, and the second packing pressing ring 10 is detachably located on the top of the second packing 11 to press the second packing 11. In this preferred embodiment, the pressing ring 4 and the second packing pressing ring 10 are both detachable, so that the first packing 6 and the second packing 11 are easy to disassemble and assemble; at the same time, the packing sealing structure is additionally provided with a pressing ring 4 and a second packing pressing ring 10 to press the first packing 6 and the second packing 11 respectively, thereby greatly enhancing the sealing effect of the first packing 6 and the second packing 11 on the inner wall of the housing 14 to be sealed and the outer wall of the intermediate pipe 13. That is, the first packing 6 is stuck by the pressing ring 4, the cover plate 5 and the first packing pressing ring 7 of the first sealing assembly, so that the first packing 6 plays a sealing effect on the inside of the housing 14; the sealing effect on the intermediate pipe 13 is achieved by the second packing 11 and the second packing pressing ring 10 in the stuffing box 8 of the second sealing assembly.

[0031] In a preferred embodiment of the utility model, the first sealing assembly further includes a pressure rod 1, an annular plate 2 and a fastener 3. The fastener 3 is configured to pass through the annular plate 2 and be stuck in a groove in the inner wall of the housing 14; and the pressure rod 1 passes through the annular plate 2 and presses against the pressure ring 4 along the direction in which the pressure ring 4 presses the first filler 6. In this preferred embodiment, the annular plate 2 and the fastener 3 facilitate the disassembly and assembly of the pressure rod 1; the pressure rod 1 presses against the pressure ring 4 to press the pressure ring 4 and then presses the first filler 6, thereby further enhancing the sealing effect of the first filler 6 on the inner wall of the housing 14.

[0032] In a preferred embodiment of the present invention, there are multiple pressure rods 1 , and the multiple pressure rods 1 are evenly arranged along the circumference of the annular plate 2 .

[0033] In a preferred embodiment of the present invention, the pressure rod 1 is a bolt; the annular plate 2 is provided with a threaded hole for the pressure rod 1 to pass through, and the inner wall of the threaded hole is threadedly matched with the outer wall of the pressure rod 1. In this way, it is not only easy to disassemble and assemble the pressure rod 1, but also more convenient to apply pressure. By tightening the pressure rod 1 downward, the pressure ring 4 can be compressed, and the compression effect on the first filler 6 can be more conveniently achieved.

[0034] In a preferred embodiment of the present invention, the fastener 3 is a screw.

[0035] In a preferred embodiment of the present invention, the pressure ring 4 includes a transverse portion and a longitudinal portion that are integrally formed, wherein the transverse portion is located on the cover plate 5 and the longitudinal portion extends into the gap. Figure 2 The partial pressing ring 4 shown in the figure is in an inverted L-shape, and uses its longitudinal part to press the first filler 6 to achieve a sealing effect.

[0036] In a preferred embodiment of the present invention, a compression nut 9 located on the top of the second packing pressure ring 10 is also installed in the stuffing box 8, and the outer wall of the compression nut 9 is threadedly matched with the inner wall of the stuffing box 8. In this embodiment, by detachably adding the compression nut 9 to the stuffing box 8, the second packing pressure ring 10 and then the second packing 11 can be pressurized by screwing the compression nut 9 downward, thereby further enhancing the sealing effect of the second packing 11 on the outer wall of the intermediate tube 13.

[0037] In a preferred embodiment of the present invention, a packing retaining ring 12 is further installed in the packing box 8 , and the packing retaining ring 12 is located at the bottom of the second packing 11 .

[0038] In a preferred embodiment of the present invention, the first filler 6 and the second filler 11 are both graphite braided fillers, such as flexible graphite braided fillers.

[0039] A packing seal structure of a preferred embodiment of the utility model is used for sealing. Figure 1As shown, the cover plate 5 divides the housing 14 into two chambers (upper chamber and lower chamber) from top to bottom, the bottom of the intermediate tube 13 is located in the lower chamber of the housing 14, and the top of the intermediate tube 13 is located in the upper chamber of the housing 14 and is used to communicate with the external pipeline. The pressure rod (for example, a hexagonal bolt) 1 passes through the bolt hole of the annular plate 2 (the bolt holes are evenly distributed on the annular plate 2, and the inner wall of the bolt hole has threads to match the outer threads of the hexagonal bolt 1); the fastener (for example, a screw) 3 passes through the annular plate 2 and is stuck in the groove of the inner wall of the housing 14; the cover plate 5 and the first packing pressing ring 7 fix the first packing 6 in the middle, tighten the hexagonal bolt 1 downward to compress the pressing ring 4, and the pressing ring 4 compresses the flexible first packing 6, thereby achieving the effect of sealing the interior of the housing 14, so that the lower chamber of the housing 14 is sealed. A cover plate hole is provided in the cover plate 5, and a stuffing box 8 is welded in the cover plate hole; a stuffing retaining ring 12, a second stuffing 11, a second stuffing pressing ring 10 and a clamping nut 9 are installed inside the stuffing box 8, wherein the stuffing retaining ring 12 and the second stuffing pressing ring 10 fix the second stuffing 11 in the middle; the internal thread of the inner wall of the stuffing box 8 matches the external thread of the clamping nut 9, and the four grooves on the upper part of the main clamping nut 9 are clamped by a special wrench (for example, Figure 5 As shown in the figure, the compression nut 9 is tightened downward to compress the flexible second packing 11 downward, thereby achieving the effect of sealing the outer wall of the intermediate tube 13. Therefore, the packing sealing structure not only seals the interior of the housing 14, but also makes the outer wall of the intermediate tube 13 well sealed; and the whole set of sealing structure is convenient for disassembly and assembly while achieving the sealing effect, and is suitable for scenes where sealing is required inside various equipment, especially equipment with small diameter and high pressure, and has a wide range of application prospects.

[0040] It should be understood that the drawings in the embodiments of the present invention only relate to structures related to the embodiments of the present invention, and other structures can refer to the usual design. The devices and / or structures in the various embodiments provided in the present invention can be combined, modified and / or changed to form new technical solutions. In the absence of creative work, these technical solutions should also be included in the scope of protection claimed by the present invention.

[0041] A large number of specific examples are provided in the embodiments provided herein, and it should be understood that these examples are only for the purpose of describing the embodiments of the present invention in detail and are not intended to limit the present invention. The embodiments of the present invention can be practiced without these specific examples. In some embodiments, structures and / or technologies known to those skilled in the art are not shown in detail so as not to obscure the understanding of the present invention.

[0042] Although preferred embodiments of the present invention have been shown and described herein, it is readily understood by those skilled in the art that these embodiments are provided by way of example only. A variety of changes, modifications, and substitutions will now occur to those skilled in the art without departing from the present invention. It should be understood that the various alternatives to the embodiments of the present invention described herein are optionally used to implement the present invention. It is intended to define the scope of the present invention with the following claims, and thus cover the devices, structures, and equivalents thereof within the scope of these claims.

Claims

1. A packing sealing structure, characterized in that: include: A first sealing assembly, the first sealing assembly comprising a first packing pressing ring (7), a cover plate (5), a first packing (6) and a pressing ring (4), wherein the first packing pressing ring (7) is configured to be fixed circumferentially to the inner wall of a housing (14) to be sealed, the cover plate (5) is arranged on the first packing pressing ring (7) and is configured to form a gap with the inner wall of the housing (14), the first packing (6) is configured to be filled in the gap, and the pressing ring (4) is circumferentially and detachably arranged on the cover plate (5) and is configured to press the first packing (6) in the gap; and A second sealing assembly, the second sealing assembly comprises a stuffing box (8), the stuffing box (8) passes through the cover plate (5) and is connected to the cover plate (5), a second stuffing box (11) and a second stuffing ring (10) are installed in the stuffing box (8), wherein the second stuffing box (11) is configured to seal the outer wall of an intermediate pipe (13) in the housing (14) for communicating with an external pipeline, and the second stuffing ring (10) is detachably located on the top of the second stuffing box (11) to press the second stuffing box (11).

2. The packing seal structure according to claim 1, characterized in that: The first sealing assembly further comprises a pressure rod (1), an annular plate (2) and a fastener (3), wherein: The fastener (3) is configured to pass through the annular plate (2) and be clamped in a groove in the inner wall of the housing (14), and the pressure rod (1) passes through the annular plate (2) and presses against the pressure ring (4) in the direction in which the pressure ring (4) presses the first filler (6).

3. The packing seal structure according to claim 2, characterized in that: There are a plurality of pressure rods (1), and the plurality of pressure rods (1) are evenly arranged along the circumference of the annular plate (2).

4. The packing seal structure according to claim 2 or 3, characterized in that: The pressure rod (1) is a bolt.

5. The packing seal structure according to claim 4, characterized in that: The annular plate (2) is provided with a threaded hole for the pressure rod (1) to pass through, and the inner wall of the threaded hole is threadably matched with the outer wall of the pressure rod (1).

6. The packing seal structure according to claim 2, characterized in that: The fastener (3) is a screw.

7. The packing seal structure according to claim 1, characterized in that: The pressure ring (4) comprises a transverse portion and a longitudinal portion which are integrally formed, wherein the transverse portion is located on the cover plate (5), and the longitudinal portion extends into the gap.

8. The packing seal structure according to claim 1, characterized in that: The stuffing box (8) is also provided with a clamping nut (9) located on the top of the second stuffing ring (10), and the outer wall of the clamping nut (9) is threadably matched with the inner wall of the stuffing box (8).

9. The packing seal structure according to claim 8, characterized in that: A packing retaining ring (12) is also installed in the packing box (8), and the packing retaining ring (12) is located at the bottom of the second packing (11).

10. The packing seal structure according to claim 1, characterized in that: The first filler (6) and the second filler (11) are both graphite braided fillers.

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