CN215831634U - Water seal that reliability is high - Google Patents

Abstract

The utility model provides a water seal with high reliability, which comprises: the mechanical gland comprises a mechanical gland, an assembling part, a limiting assembly, a sealing cover, a moving shaft and a lubricating part, wherein the lubricating part is sleeved at one end of the moving shaft, the sealing cover is arranged at the top of the moving shaft, the mechanical gland is sleeved on the surface of the sealing cover, the assembling part is arranged at the bottom end of the mechanical gland, and the limiting assembly is uniformly distributed on the assembling part; the mechanical gland pushes the assembling part to be spliced with the pump body connecting piece, the limiting assembly penetrates through the assembling part to be connected with a splicing piece to complete assembling, and the moving shaft rotates to supplement oil to the lubricating part along with rotation when in use; the utility model realizes the function of quick assembly and simultaneously stably connects the water seal with the pump body; in addition, the self-lubricating effect is realized, the dry grinding phenomenon is avoided, and the aging speed is effectively delayed.

Description

Water seal that reliability is high

Technical Field

The utility model relates to the technical field of water seals, in particular to a water seal with high reliability.

Background

The mechanical water seal is a shaft seal device of rotary machinery, such as a centrifugal pump, a centrifuge, a reaction kettle, a compressor and other equipment, and a transmission shaft penetrates through the inside and the outside of the equipment, so that a circumferential gap exists between the shaft and the equipment, a medium in the equipment leaks outwards through the gap, and if the pressure in the equipment is lower than the atmospheric pressure, air leaks inwards the equipment, so that a shaft seal device for preventing leakage is required; however, when the water seal is applied to the interior of devices such as a pump body and the like, the assembly is complicated, and meanwhile, the frequent addition of lubricant is needed in the use process to avoid mutual abrasion, which brings great trouble to people

Therefore, under certain circumstances, a water seal with high reliability is required to replace the water seal.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the assembly is tedious and easy to wear, in order to solve the problem among the prior art. The utility model provides a water seal with high reliability to solve the problems.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a water seal with high reliability comprises: the mechanical gland comprises a mechanical gland, an assembling part, a limiting assembly, a sealing cover, a moving shaft and a lubricating part, wherein the lubricating part is sleeved at one end of the moving shaft, the sealing cover is arranged at the top of the moving shaft, the mechanical gland is sleeved on the surface of the sealing cover, the assembling part is arranged at the bottom end of the mechanical gland, and the limiting assembly is uniformly distributed on the assembling part; wherein

The mechanical gland pushes the assembling portion to be spliced with the pump body connecting piece, then the limiting assembly penetrates through the assembling portion to be connected with the splicing piece to complete assembling, and when the mechanical gland is used, the moving shaft rotates to supplement oil to the lubricating portion along with rotation.

Furthermore, the assembly part comprises a bearing sheet, a plurality of cross-shaped positioning holes are circumferentially fixed at the top of the bearing sheet, and two groups of locking assemblies are arranged inside each cross-shaped positioning hole; and

the bearing sheet is coaxially arranged at the bottom of the mechanical gland, one cross-shaped positioning hole corresponds to one limiting component, and the two groups of locking components are arranged in the cross-shaped positioning hole in a mirror image mode.

Furthermore, the locking assembly comprises a fixed short rod, arc-shaped elastic sheets are hinged to the tops of the fixed short rod at equal intervals, and a tension spring cylinder is mounted on one side of each arc-shaped elastic sheet; and

the fixed short rod is fixed in the cross-shaped positioning hole, all the arc-shaped elastic sheets are arranged at the top of the fixed short rod and are umbrella-shaped, and one end of the tension spring cylinder, which is far away from the arc-shaped elastic sheets, is fixedly connected with the surface of the fixed short rod.

Furthermore, the limiting assembly comprises a T-shaped pin, a button cap is fixed at the top of the T-shaped pin, and a pressing sheet is fixed on the surface of the T-shaped pin below the button cap; and

the intersecting contour of the button cap and the pressing sheet is matched with the inner diameter of the cross-shaped positioning hole.

Furthermore, a positioning groove is fixed at the bottom end of the pressing sheet corresponding to the fixed short rod, and inclined annular grooves which incline upwards are uniformly formed in the positioning groove; wherein

And pressing the button cap to enable the T-shaped pin to penetrate through the cross-shaped positioning hole, enabling the positioning groove to be clamped on the arc-shaped elastic sheet at the top end of the fixed short rod, enabling the tension spring cylinder to stretch under pressure, and enabling the inclined annular groove to prevent the arc-shaped elastic sheet from being separated upwards.

Furthermore, the lubricating part comprises a bearing shaft sleeve, a compression assembly and an oil supplementing assembly are fixed inside the bearing shaft sleeve, and a pressing assembly is fixed on the movable shaft corresponding to the compression assembly; and

the bearing shaft sleeve is hollow, and the inner wall of the bearing shaft sleeve corresponds to the abutting-against component and is provided with a ring groove.

Furthermore, the pressing component comprises a link ring, and a hemispherical convex block is fixed on the outer wall of the link ring; and

the linkage ring is fixed on the surface of the moving shaft, and the diameter of the hemispherical convex block is equal to the height of a ring groove formed in the inner wall of the bearing shaft sleeve.

Furthermore, the compression assembly comprises an inner ring, an arc-shaped air bag is arranged inside the inner ring, a bearing spring is arranged on one side of the arc-shaped air bag, and a steel ball is fixed at the other end of the spring;

the inner ring is fixedly fixed in the bearing shaft sleeve corresponding to the linkage ring, one side of the arc-shaped air bag is tightly attached to the upper inner wall of the inner ring, a movable hole is formed in one side of the inner ring, which is far away from the outer diameter of the bearing shaft sleeve, and the diameter of the steel ball is larger than that of the movable hole; and one end of the steel ball extends out of the movable hole under the supporting spring.

Further, the oil supplementing assembly comprises an inner ring, an annular air bag is arranged above the inner part below the inner ring, and oil storage cotton is arranged below the inner ring; and

the annular air bag is communicated with the arc-shaped air bag through an air pipe, and the annular air bag is compressed to enable the inflation volume of the annular air bag to be increased so as to compress the oil storage cotton.

Furthermore, an annular baffle is arranged at the position, connected with the movable shaft, below the inner ring on one side of the oil storage cotton, and conical row holes are uniformly formed in the annular baffle;

when the oil storage cotton is compressed, internal lubricating oil acts on the surface of the rotating moving shaft from the conical row holes.

According to the utility model, the bearing sheet is arranged on the mechanical gland to be contacted with the pump body splicing piece, the bearing sheet penetrates through the cross-shaped positioning hole to be connected with the splicing piece, and meanwhile, the umbrella-shaped connecting piece formed by the arc-shaped elastic sheet is clamped in the inclined annular groove in the positioning groove to prevent the locking assembly from falling off, so that the function of quick assembly is realized, and the water seal is stably connected with the pump body;

in addition, the bearing shaft sleeve is arranged on the fixed shaft, the hemispherical convex block extrudes the steel ball by rotating the linkage ring follow-up shaft, so that the bearing spring enables the compressed gas of the arc-shaped air bag to be filled into the annular air bag from the exhaust pipe, the annular air bag extrudes the oil storage cotton, the internal lubricating oil acts on the rotating moving shaft through the tapered row holes, the self-lubricating effect is realized, the dry grinding phenomenon is avoided, and the aging speed is effectively delayed.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of a preferred embodiment of a highly reliable water seal according to the present invention;

FIG. 2 is a perspective view of a preferred embodiment of the mounting portion of the present invention;

FIG. 3 is a cross-sectional view of a preferred embodiment of the spacing assembly of the present invention;

FIG. 4 is a perspective view of a preferred embodiment of the locking assembly of the present invention;

FIG. 5 is a cross-sectional view of a preferred embodiment of the locking assembly of the present invention;

FIG. 6 is a perspective cross-sectional view of a preferred embodiment of the lubrication portion of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at A according to the present invention;

fig. 8 is an enlarged view of the structure of fig. 6B according to the present invention.

In the drawings

1. Mechanical pressing cover; 2. an assembling portion; 3. a limiting component; 4. a sealing cover; 5. a moving shaft; 6. a lubricating section;

21. a support sheet; 22. a locking assembly; 23. a cross-shaped positioning hole;

31. a T-shaped pin; 32. tabletting; 33. a button cap; 34. positioning a groove; 35. an oblique ring groove;

61. a bearing shaft sleeve; 62. a pressing component; 63. a compression assembly; 64. an oil supplementing assembly;

221. fixing the short rod; 222. an arc-shaped elastic sheet; 223. a tension spring barrel;

621. a link ring; 622. a hemispherical bump;

631. on the inner ring; 632. supporting the spring; 633. steel balls; 634. an arc-shaped air bag;

641. the inner ring is arranged below; 642. an annular air bag; 643. oil storage cotton; 644. an annular baffle; 645. and (5) conical holes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the utility model include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1, fig. 1 is a perspective view of a water seal according to a preferred embodiment of the present invention; referring to fig. 2, fig. 2 is a perspective view of a preferred embodiment of the mounting portion of the present invention; referring to FIG. 3, FIG. 3 is a cross-sectional view of a preferred embodiment of a stop assembly according to the present invention; referring to FIG. 4, FIG. 4 is a perspective view of a preferred embodiment of the locking assembly of the present invention; referring to FIG. 5, FIG. 5 is a cross-sectional view of a preferred embodiment of the locking assembly of the present invention; referring to FIG. 6, FIG. 6 is a perspective cross-sectional view of a preferred embodiment of the lubrication portion of the present invention; referring to fig. 7, fig. 7 is an enlarged schematic view of a portion a in fig. 6 according to the present invention; referring to fig. 8, fig. 8 is an enlarged schematic view of a portion B in fig. 6 according to the present invention; as shown in fig. 1 to 8, the present invention provides a water seal with high reliability, including: the mechanical gland comprises a mechanical gland 1, an assembling part 2, a limiting component 3, a sealing cover 4, a moving shaft 5 and a lubricating part 6; the mechanical gland 1 is used for bearing the top of a water seal in the mechanical gland, the assembling portion 2 is used for connecting the whole water seal with the inside of a pump body, the limiting assembly 3 is used for enabling the mechanical gland 1 to be stably connected with the pump body through the assembling portion 2, the sealing cover 4 is used for playing a protection role, the moving shaft 5 rotates in the whole inside of the water seal, and the lubricating portion 6 is mainly used for avoiding surface abrasion of the rotating moving shaft 5. With respect to the above components, detailed description is given below.

Mechanical gland

As in the prior art, in the water seal shown in this embodiment, the mechanical gland 1 is disposed at the top end of the water seal for protecting the internal elements of the water seal, specifically, the mechanical gland 1 is cylindrical, and the interior of the mechanical gland is cylindrical, and is used for connecting the mechanical gland 1 and the pump body to enable the water seal to stably operate therein.

Assembling part

The assembly part 2 is fixed in the bottom of the mechanical gland 1, specifically, the outer contour of the assembly part 2 is integrally annular and fixed at the edge position of the bottom of the mechanical gland 1, and the assembly part 2 is spliced with the pump body connecting piece.

The following describes the composition structure of the assembly part 2 specifically, the assembly part 2 includes a support sheet 21, a plurality of cross-shaped positioning holes 23 are circumferentially fixed on the top of the support sheet 21, and in order to make the water seal and the pump body connecting piece have a connecting effect, two groups of locking assemblies 22 are arranged inside each cross-shaped positioning hole 23; and the bearing sheet 21 is coaxially installed at the bottom of the mechanical gland 1, in order to strengthen the stability of the mutual connection, one cross-shaped positioning hole 23 corresponds to one limiting component 3, two groups of locking components 22 are arranged in a mirror image manner in the cross-shaped positioning hole 23. And connecting the bearing sheet 21 with the piece to be spliced, and aligning each cross-shaped positioning hole 23 to a mounting hole on the pump body respectively to finish the effect of quick splicing.

Locking assembly

Two locking assemblies 22 are fixed in one cross-shaped positioning hole 23, and the overall outer contour of each locking assembly 22 is umbrella-shaped and is used for achieving the effect of stable connection after splicing.

The composition structure of the locking assembly 22 is described in detail below, where the locking assembly 22 includes a fixed short rod 221, the top of the fixed short rod 221 is hinged with an arc-shaped elastic sheet 222 at an equal interval, and a tension spring cylinder 223 is installed on one side of the arc-shaped elastic sheet 222 for supporting the arc-shaped elastic sheet 222 and the fixed short rod 221 to form a certain included angle; the fixing short rod 221 is fixed in the cross-shaped positioning hole 23, all the arc-shaped elastic pieces 222 are arranged at the top of the fixing short rod 221 in an umbrella shape, and one end of the tension spring cylinder 223, which is far away from the arc-shaped elastic pieces 222, is fixedly connected with the surface of the fixing short rod 221.

Through articulated a plurality of arc shell fragment 222 on fixed quarter butt 221, make arc shell fragment 222 carry out the bearing again through tension spring cylinder 223 and make its lateral wall be certain contained angle with fixed quarter butt 221, tension spring cylinder 223 can contract and then reduce and be certain contained angle with its lateral wall and fixed quarter butt 221 when making the outside hand extrusion force of arc shell fragment 222, and the contained angle changes and then makes the whole radius change that is umbelliform, makes the constant head tank in the certain aperture of its adaptation.

Limiting assembly

A spacing subassembly 3 corresponds to set up in a cross locating hole 23 position department, and the outline of cross locating hole 23 is the cross form that coincide each other with cross locating hole 23 internal diameter, and spacing subassembly 3 is used for passing cross locating hole 23 and with make fixed quarter butt 221 card in its bottom, and the bottom of spacing subassembly 3 passes cross locating hole 23 and extends to the splice connecting hole of the pump body simultaneously, has realized quick assembly's function, and simultaneously stable is connected this water seal with the pump body.

The composition structure of the limiting assembly 3 is described in detail below, the limiting assembly 3 includes a T-shaped pin 31, a button cap 33 is fixed on the top of the T-shaped pin 31, and a pressing piece 32 is fixed on the surface of the T-shaped pin 31 below the button cap 33 for facilitating the engagement with the cross-shaped positioning hole 23; the intersecting outline of the button cap 33 and the pressing sheet 32 is matched with the inner diameter of the cross-shaped positioning hole 23; a positioning groove 34 is fixed at the bottom end of the pressing sheet 32 corresponding to the fixed short rod 221, and in order to enhance the stability of connection, an inclined annular groove 35 which is inclined upwards is uniformly formed in the positioning groove 34; wherein press button cap 33 makes T word round pin 31 passes cross locating hole 23, and make locating slot 34 card is established fixed quarter butt 221 top arc shell fragment 222 is last, and pressure makes tension spring section of thick bamboo 223 is flexible, oblique annular 35 avoids arc shell fragment 222 upwards deviates from.

By aligning the T-shaped pin 31 on the cross-shaped positioning hole 23 and then pressing the button cap 33, the pressing sheet 32 is clamped in the cross-shaped positioning hole 23, at this time, the positioning groove 34 is sleeved on the fixing short rod 221, in the sleeving process, the inner wall of the positioning groove 34 will press the arc-shaped spring 222 to make the tension spring barrel 223 extend and contract to reduce the umbrella-shaped radius until the radius is matched with the radius of the positioning groove 34, the arc-shaped spring 222 will act on the positioning groove 34 under the support of the fixing short rod 221, at this time, the reaction force generated by the compression of the tension spring barrel 223 makes the outer wall of the arc-shaped spring 222 cling to the inner wall of the positioning groove 34, when arc shell fragment 222 has the pulling force down, the inclined ring groove 35 of the tilt up of the inside setting of constant head tank 34 can strengthen the resistance of arc shell fragment 222, just can deviate from in the constant head tank 34 until the pulling force that receives is greater than the sum of lateral wall extrusion force and surface resistance, and then stability when having strengthened mutual concatenation.

Lubrication part

The lubricating part 6 is sleeved on the surface of the moving shaft 5, the outer contour of the lubricating part 6 is annular, and the lubricating part is used for automatically supplementing oil to the moving shaft 5 in the continuous rotating process of the moving shaft 5, so that the abrasion between the moving shaft 5 and an external connecting piece is reduced, and the aging speed of the moving shaft 5 is effectively delayed.

The following describes the composition structure of the lubricating portion 6 in detail, the lubricating portion 6 includes a bearing sleeve 61, in order to achieve the effect of automatic oil supply on the surface of the moving shaft, a compression assembly 63 and an oil supply assembly 64 are fixed inside the bearing sleeve 61, in order to enable the oil supply assembly to continuously discharge oil to act on the moving shaft, a pressing assembly 62 is fixed on the moving shaft 5 corresponding to the compression assembly 63; and the bearing shaft sleeve 61 is hollow, and the inner wall of the bearing shaft sleeve 61 is provided with a ring groove corresponding to the abutting component 62.

When the moving shaft 5 rotates, the compression assembly 63 is extruded through the abutting assembly 62 to enable lubricating oil inside the oil supplementing assembly 64 to be uniformly applied to the surface of the moving shaft 5, so that the self-lubricating effect is realized, the dry grinding phenomenon is avoided, and the aging speed is effectively delayed.

Abutting assembly

The pressing component 62 is fixed on the surface of the moving shaft and arranged inside the bearing shaft sleeve 61, the pressing component 62 rotates along with the shaft 5, and the drum extrudes the primary compression component 63 for one circle while rotating.

The composition structure of the pressing component 62 is described in detail below, where the pressing component 62 includes a link ring 621, and a hemispherical protrusion 622 is fixed on the outer wall of the link ring 621; and the link ring 621 is fixed on the surface of the moving shaft 5, and the diameter of the hemispherical convex block 622 is equal to the height of the ring groove formed on the inner wall of the bearing shaft sleeve 61. During the rotation of the follower shaft 5, the link ring 621 drives the hemispherical protrusions 622 to press the compression assembly 63.

Compression assembly

The compressing assembly 63 is disposed above the inner cavity of the bearing sleeve 61, and the width of the compressing assembly 63 and the width of the linking ring 621 when the hemisphere protruding block 622 contacts with the linking ring are integrally consistent with the width of the inner cavity of the bearing sleeve 61 in a natural state.

The following describes the composition of the compressing assembly 63 in detail, wherein the compressing assembly 63 includes an inner ring 631, an arc-shaped air bag 634 is disposed inside the inner ring 631, a supporting spring 632 is disposed on one side of the arc-shaped air bag 634, and a steel ball 633 is fixed to the other end of the supporting spring 632 in order to make the hemispherical convex block 622 rotate to a certain position and have a force for compressing the supporting spring 632; the inner ring 631 is fixed in the bearing sleeve 61 corresponding to the link ring 621, one side of the arc-shaped air bag 634 clings to the inner wall of the inner ring 631, one side of the inner ring 631, which is far away from the outer diameter of the bearing sleeve 61, is provided with a movable hole, and the diameter of the steel ball 633 is larger than that of the movable hole; and one end of the steel ball 633 extends out of the movable hole under the support of the support spring 632.

When the rotating shaft 5 rotates continuously, the linking ring 621 drives the hemispherical protrusion 622 to extrude the steel ball 633 once every rotation, the steel ball compresses the supporting spring 632 to extrude the arc-shaped air bag 634 after being extruded, and the gas inside the arc-shaped air bag is transmitted into the oil replenishing assembly 64.

Oil supplementing assembly

The oil supplementing assembly 64 is arranged below the inner cavity of the bearing shaft sleeve 61, the width of the oil supplementing assembly 64 is matched with that of the inner cavity of the bearing shaft sleeve 61, the outer wall of the inner diameter of the oil supplementing assembly 64 is in contact with the surface of the moving shaft, and when lubricating oil is discharged, the lubricating oil uniformly acts on the surface of the lubricating shaft, so that abrasion is reduced.

The following describes the composition structure of the oil compensating assembly 64 in detail, where the oil compensating assembly 64 includes an inner ring lower 641, an annular air bag 642 is disposed above the inner part of the inner ring lower 641, and an oil storing cotton 643 is disposed below the inner ring lower 641; and the annular air bag 642 is communicated with the arc-shaped air bag 634 through an air pipe, the arc-shaped air bag 634 is compressed to make the inflation volume of the annular air bag 642 larger so as to compress the oil storage cotton 643; an annular baffle 644 is arranged at the connecting position of the inner ring lower 641 on one side of the oil storage cotton 643 and the moving shaft 5, and in order to avoid waste caused by excessive outflow of lubricating oil, conical discharge holes 645 are uniformly formed in the annular baffle 644; the inner lubrication oil acts on the surface of the moving shaft 5 in rotation from the tapered row holes 645 when the oil reservoir cotton 643 is compressed.

After the moving shaft 5 rotates to extrude the arc-shaped air bag 634, air enters the annular air bag 642 through the exhaust pipe, the whole volume of the interior paint is increased, and then the effect of extruding the oil storage cotton 643 can be achieved, the gap of the extruded oil storage cotton 643 is reduced, lubricating oil can be discharged, and redundant lubricating oil can flow through the tapered discharge holes 645 to the surface of the moving shaft 5.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A water seal with high reliability is characterized by comprising: the device comprises a mechanical gland (1), an assembling part (2), a limiting assembly (3), a sealing cover (4), a moving shaft (5) and a lubricating part (6), wherein the lubricating part (6) is sleeved at one end of the moving shaft (5), the sealing cover (4) is arranged at the top of the moving shaft (5), the mechanical gland (1) is sleeved on the surface of the sealing cover (4), the assembling part (2) is arranged at the bottom end of the mechanical gland (1), and the limiting assembly (3) is uniformly distributed on the assembling part (2); wherein

Through mechanical gland (1) promotes assembly portion (2) and pump body connecting piece concatenation make spacing subassembly (3) pass again assembly portion (2) are connected with the concatenation and are accomplished the assembly, when using moving axis (5) rotate and pass through lubrication portion (6) are along with rotating and are mended oil to it.

2. The water seal with high reliability as claimed in claim 1, wherein the assembly portion (2) comprises a supporting sheet (21), a plurality of cross-shaped positioning holes (23) are circumferentially fixed on the top of the supporting sheet (21), and two sets of locking assemblies (22) are arranged inside each cross-shaped positioning hole (23); and

the bearing sheet (21) is coaxially installed at the bottom of the mechanical gland (1), one is the cross-shaped positioning hole (23) corresponding to one limiting component (3), and the locking component (22) is arranged in the cross-shaped positioning hole (23) in a mirror image mode.

3. The water seal with high reliability as claimed in claim 2, wherein the locking assembly (22) comprises a fixed short rod (221), the top of the fixed short rod (221) is hinged with an arc-shaped spring piece (222) at equal intervals, and a tension spring barrel (223) is installed on one side of the arc-shaped spring piece (222); and

the fixing short rod (221) is fixed in the cross-shaped positioning hole (23), all the arc-shaped elastic sheets (222) are arranged at the top of the fixing short rod (221) in an umbrella shape, and one end, far away from the arc-shaped elastic sheets (222), of the tension spring cylinder (223) is fixedly connected with the surface of the fixing short rod (221).

4. The water seal with high reliability as claimed in claim 3, wherein the limiting component (3) comprises a T-shaped pin (31), a button cap (33) is fixed on the top of the T-shaped pin (31), and a pressing sheet (32) is fixed on the surface of the T-shaped pin (31) below the button cap (33); and

the intersecting contour of the button cap (33) and the pressing sheet (32) is matched with the inner diameter of the cross-shaped positioning hole (23).

5. The water seal with high reliability as claimed in claim 4, wherein a positioning groove (34) is fixed at the bottom end of the pressing plate (32) corresponding to the fixing short rod (221), and an inclined ring groove (35) which is inclined upwards is uniformly formed inside the positioning groove (34); wherein

Press button cap (33) makes T word round pin (31) pass cross locating hole (23), and make constant head tank (34) card is established fixed quarter butt (221) top on arc shell fragment (222), pressure makes tension spring cartridge (223) stretch out and draw back, inclined ring groove (35) are avoided arc shell fragment (222) upwards are deviate from.

6. The water seal with high reliability according to claim 1, wherein the lubricating portion (6) comprises a bearing sleeve (61), a compression assembly (63) and an oil supplementing assembly (64) are fixed inside the bearing sleeve (61), and a pressing assembly (62) is fixed on the moving shaft (5) corresponding to the compression assembly (63); and

bear axle sleeve (61) inside and be cavity, just bear axle sleeve (61) inner wall and correspond it has seted up the annular to support to press subassembly (62).

7. The water seal with high reliability as claimed in claim 6, wherein the pressing component (62) comprises a link ring (621), and a hemispherical convex block (622) is fixed on the outer wall of the link ring (621); and

the linkage ring (621) is fixed on the surface of the moving shaft (5), and the diameter of the hemispherical convex block (622) is equal to the height of a ring groove formed in the inner wall of the bearing shaft sleeve (61).

8. The water seal with high reliability as claimed in claim 7, wherein the compression assembly (63) comprises an inner ring (631), an arc-shaped air bag (634) is arranged inside the inner ring (631), one side of the arc-shaped air bag (634) is provided with a supporting spring (632), and the other end of the spring is fixed with a steel ball (633);

the inner ring (631) is fixed in the bearing shaft sleeve (61) corresponding to the linkage ring (621), one side of the arc-shaped air bag (634) is tightly attached to the inner wall of the inner ring (631), a movable hole is formed in one side of the inner ring (631) far away from the outer diameter of the bearing shaft sleeve (61), and the diameter of the steel ball (633) is larger than that of the movable hole; and one end of the steel ball (633) extends out of the movable hole under the support of the support spring (632).

9. The water seal with high reliability according to claim 8, wherein the oil compensating assembly (64) comprises an inner ring lower part (641), an annular air bag (642) is arranged above the inner part of the inner ring lower part (641), and an oil storing cotton (643) is arranged below the inner ring lower part (641); and

the annular air bag (642) is communicated with the arc-shaped air bag (634) through an air pipe, and the arc-shaped air bag (634) is compressed to enlarge the inflating volume of the annular air bag (642) so as to compress the oil storage cotton (643).

10. The water seal with high reliability as claimed in claim 9, wherein an annular baffle (644) is arranged at a connecting position of the inner ring lower part (641) at one side of the oil storage cotton (643) and the moving shaft (5), and tapered discharge holes (645) are uniformly opened in the annular baffle (644);

internal lubrication oil acts on the surface of the moving shaft (5) in rotation from the tapered row holes (645) when the oil reservoir cotton (643) is compressed.

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