Container type packing sealing structure

Abstract

The utility model discloses a packaging type packing sealing structure in the technical field of sealing structures. Comprising a shaft sleeve for sealing packing and a packing ring, a gland and a packing box, a limiting groove is formed in one end of a rotating shaft, a plurality of first positioning threaded holes used for being matched with first fastening bolts to position the shaft sleeve are formed in a groove cavity of the limiting groove, and a guide protruding block used for guiding the first fastening bolts is installed in the groove cavity of the limiting groove. The first positioning threaded hole is formed in the groove cavity of the limiting groove and can be matched with the first fastening bolt to fasten the shaft sleeve, the guide protruding block is arranged, so that when the first fastening bolt is rotated, the bottom of the first fastening bolt drives the rotating shaft to rotate under the guiding of the cambered surface of the guide protruding block, and the shaft sleeve is fastened. And then the first fastening bolt is driven to slide towards a hole cavity of the first positioning threaded hole, finally, the lower end of the first fastening bolt is inserted into the hole cavity of the first positioning threaded hole, and locking of the shaft sleeve is completed.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, specifically to a cartridge-type packing sealing structure. Background Technology

[0002] Packing seals are a type of sealing that uses packing to block leakage channels and prevent leakage. They have advantages such as simple structure and low cost, and are widely used in mechanical equipment such as centrifugal pumps. Traditional packing seals are cuboids with a square cross-section. Before installation, the length of a single packing piece needs to be calculated based on the radial dimensions of the packing cavity. Then, the required number of packing pieces of the corresponding length are cut out. Finally, the packing pieces are inserted one by one into the packing cavity, and the packing gland is installed and the fasteners are tightened.

[0003] For example, the cartridge-type packing seal structure disclosed in Chinese Patent Publication No. CN205117793U includes a shaft, a shaft sleeve, a pump body, packing, and a packing gland. The shaft sleeve is fitted onto the shaft and connected by a key to achieve synchronous rotation. A cartridge packing box is provided between the pump body and the shaft, and the cartridge packing box is fitted onto the shaft sleeve. The annular space between the cartridge packing box and the shaft sleeve forms a packing chamber, in which the packing is placed. The packing gland is fixedly installed on the cartridge packing box with fastening bolts to seal the packing. The cartridge packing box is fixed to the pump body with connecting bolts. A positioning ring groove is provided on the shaft, and a positioning screw passes radially through the shaft sleeve and is inserted into the positioning ring groove. This design has the following technical problems:

[0004] The installation method involves machining a positioning ring groove and inserting one end of a positioning screw into the positioning ring groove. However, in actual use, the positioning screw and the positioning ring groove may slip, resulting in poor stability due to the contact between the positioning screw and the positioning ring groove. Utility Model Content

[0005] Therefore, this utility model provides a cartridge-type packing seal structure to solve the problem of poor stability in the existing installation method where the positioning screw and positioning ring groove collide.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cartridge-type packing seal structure includes a bushing, a gland, and a packing box for sealing the packing and packing rings.

[0008] The bushing has a rotating shaft installed inside, and one end of the bushing is equipped with a plurality of first fastening bolts for cooperating with the rotating shaft to limit the bushing.

[0009] One end of the rotating shaft is provided with a limiting groove for limiting the first fastening bolt. The groove cavity is provided with a plurality of first positioning threaded holes for positioning the bushing in conjunction with the first fastening bolt. The groove cavity is provided with a guide protrusion for guiding the first fastening bolt.

[0010] Furthermore, the limiting groove is an annular groove, the guide protrusion is an irregularly shaped block, and one side of the guide protrusion is in contact with the inner wall of the limiting groove cavity. The other two sides of the guide protrusion are machined into arc surfaces. The two ends of the guide protrusion are close to the opening of the first positioning threaded hole cavity, and one end of the guide protrusion is close to the outer wall of the rotating shaft.

[0011] Furthermore, a first sealing ring is installed inside the bushing, and multiple second fastening bolts are installed on the edge of the gland.

[0012] Furthermore, the packing box has a second positioning threaded hole at one end near the gland for engaging with the second fastening bolt to limit the position of the gland, and the packing box includes a plurality of third positioning threaded holes.

[0013] Furthermore, a pump body is installed at one end of the stuffing box, and a plurality of third fastening bolts are installed at one end of the pump body to limit the stuffing box by cooperating with the third positioning threaded hole. A second sealing ring is installed inside the pump body.

[0014] This utility model has the following advantages:

[0015] This utility model provides a first positioning threaded hole in the cavity of the limiting groove, which facilitates the fastening of the bushing with the first fastening bolt. Furthermore, the guide protrusion ensures that when the first fastening bolt is rotated, the bottom of the first fastening bolt is guided by the arc surface of the guide protrusion, which in turn drives the rotating shaft to rotate. This causes the first fastening bolt to slide into the cavity of the first positioning threaded hole, and finally, the lower end of the first fastening bolt is inserted into the cavity of the first positioning threaded hole, thus locking the bushing. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A;

[0020] Figure 3 This is a schematic diagram of the structure of the rotating shaft of this utility model.

[0021] In the diagram: 10-shaft, 11-limiting groove, 12-first positioning threaded hole, 13-guide protrusion, 20-shaft sleeve, 21-first sealing ring, 22-first fastening bolt, 30-pressure cover, 31-second fastening bolt, 40-packing, 41-packing ring, 50-packing box, 51-second positioning threaded hole, 52-third positioning threaded hole, 60-pump body, 61-third fastening bolt, 62-second sealing ring. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0024] Please see Figures 1-3 This utility model provides a cartridge-type packing seal structure, including a bushing 20, a gland 30, and a packing box 50 for sealing the packing 40 and the packing ring 41.

[0025] The bushing 20 has a rotating shaft 10 installed inside. One end of the bushing 20 is equipped with a plurality of first fastening bolts 22 for cooperating with the rotating shaft 10 to limit the bushing 20, so that the bushing 20 is fixed on the rotating shaft 10. When the rotating shaft 10 rotates, it drives the bushing 20 to rotate synchronously.

[0026] One end of the rotating shaft 10 is provided with a limiting groove 11 for limiting the first fastening bolt 22. The groove cavity of the limiting groove 11 is provided with a plurality of first positioning threaded holes 12 for positioning the bushing 20 in conjunction with the first fastening bolt 22. A guide protrusion 13 for guiding the first fastening bolt 22 is fixedly installed in the groove cavity of the limiting groove 11.

[0027] The limiting groove 11 is an annular groove, the guide protrusion 13 is an irregularly shaped block, and one side of the guide protrusion 13 is in contact with the inner wall of the groove cavity of the limiting groove 11. The other two sides of the guide protrusion 13 are machined into arc surfaces. The two ends of the guide protrusion 13 are close to the opening of the first positioning threaded hole 12, and one end of the guide protrusion 13 is close to the outer wall of the rotating shaft 10.

[0028] Since the limiting groove 11 is located inside the bushing 20, after the first fastening bolt 22 is inserted into the groove of the limiting groove 11, it is difficult for the first fastening bolt 22 to fall precisely into the cavity of the first positioning threaded hole 12. This utility model, through the setting of the guide protrusion 13, enables the bottom of the first fastening bolt 22 to rotate under the guidance of the arc surface of the guide protrusion 13 when the first fastening bolt 22 is rotated, thereby driving the rotating shaft 10 to rotate, and then driving the first fastening bolt 22 to slide into the cavity of the first positioning threaded hole 12. Finally, the lower end of the first fastening bolt 22 is inserted into the cavity of the first positioning threaded hole 12, thus completing the locking of the bushing 20.

[0029] The bushing 20 has a first sealing ring 21 installed inside to prevent media leakage between the bushing and the shaft. Multiple second fastening bolts 31 are installed on the edge of the gland 30. The stuffing box 50 has a second positioning threaded hole 51 near the gland 30 for engaging with the second fastening bolts 31 to limit the position of the gland 30. By screwing the multiple second fastening bolts 31 into the cavity of the second positioning threaded hole 51, the gland 30 is fixed to one end of the stuffing box 50, thus sealing the packing 40 and the packing ring 41. After the packing 40 wears out, the third fastening bolt 61 and the first fastening bolt 22 can be removed to replace the packing 40.

[0030] The stuffing box 50 includes multiple third positioning threaded holes 52, which are located near one end of the pump body 60. The pump body 60 is installed at one end of the stuffing box 50, and multiple third fastening bolts 61 are installed at one end of the pump body 60 to limit the position of the stuffing box 50 by cooperating with the third positioning threaded holes 52. A second sealing ring 62 is installed inside the pump body 60. When installing the stuffing box 50, one end of the stuffing box 50 is inserted into the inside of one end of the pump body 60. By rotating the multiple third fastening bolts 61, the lower end of the third fastening bolts 61 is screwed into the cavity of the second sealing ring 62, thereby locking the stuffing box 50.

[0031] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cartridge-type packing seal structure, characterized in that: Includes a bushing (20), a gland (30), and a stuffing box (50) for sealing the packing (40) and packing ring (41); The bushing (20) has a rotating shaft (10) installed inside, and a plurality of first fastening bolts (22) are installed at one end of the bushing (20) to limit the bushing (20) in conjunction with the rotating shaft (10); One end of the rotating shaft (10) is provided with a limiting groove (11) for limiting the first fastening bolt (22). The groove cavity of the limiting groove (11) is provided with a plurality of first positioning threaded holes (12) for positioning the bushing (20) in conjunction with the first fastening bolt (22). The groove cavity of the limiting groove (11) is provided with a guide protrusion (13) for guiding the first fastening bolt (22).

2. The cartridge-type packing seal structure according to claim 1, characterized in that: The limiting groove (11) is an annular groove, the guide protrusion (13) is an irregular block, and one side of the guide protrusion (13) is in contact with the inner wall of the groove cavity of the limiting groove (11). The other two sides of the guide protrusion (13) are processed into arc surfaces. The two ends of the guide protrusion (13) are close to the opening of the first positioning threaded hole (12), and one end of the guide protrusion (13) is close to the outer wall of the rotating shaft (10).

3. The cartridge-type packing seal structure according to claim 1, characterized in that: The bushing (20) is equipped with a first sealing ring (21), and the edge of the cover (30) is equipped with a plurality of second fastening bolts (31).

4. The cartridge-type packing seal structure according to claim 3, characterized in that: The packing box (50) has a second positioning threaded hole (51) at one end near the pressure cap (30) for limiting the pressure cap (30) with the second fastening bolt (31), and the packing box (50) includes a plurality of third positioning threaded holes (52).

5. A cartridge-type packing seal structure according to claim 4, characterized in that: A pump body (60) is installed at one end of the stuffing box (50), and a plurality of third fastening bolts (61) are installed at one end of the pump body (60) for limiting the stuffing box (50) by cooperating with the third positioning threaded hole (52). A second sealing ring (62) is installed inside the pump body (60).

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