CN216867486U

CN216867486U - Through hole hydraulic pressure sealing device

Info

Publication number: CN216867486U
Application number: CN202122947271.6U
Authority: CN
Inventors: 解胜飞; 彭明龙; 解伟
Original assignee: WUXI HUAGUANG INDUSTRIAL BOILER CO LTD
Current assignee: WUXI HUAGUANG INDUSTRIAL BOILER CO LTD
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-07-01
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to a through hole hydraulic pressure sealing device which comprises a handle shaft, wherein a telescopic clamping hole mechanism is arranged in the handle shaft, a sealing ring and a gland are sequentially sleeved on the periphery of the handle shaft from bottom to top, a handle sleeve is sleeved on the upper part of the handle shaft, a sealing gasket is sleeved between the lower end of the handle sleeve and the gland, a telescopic clamping hole mechanism installation cavity is arranged in the handle shaft and comprises a telescopic cavity and a core shaft cavity which are mutually communicated, the telescopic clamping hole mechanism comprises a core shaft, a gear and a sliding block, the core shaft is rotatably installed in the core shaft cavity of the telescopic clamping hole mechanism, the lower part of the core shaft is connected with the gear, two sliding blocks are arranged on the periphery of the gear by taking the core shaft as a circle center array, one end of each sliding block is a rack which is meshed with the gear, the other end of each sliding block is a clamping hole end, and the two sliding blocks are slidably installed in the telescopic cavity of the telescopic clamping hole mechanism. The utility model has compact integral structure, simple manufacture and installation, convenient maintenance and good sealing performance.

Description

Through hole hydraulic pressure sealing device

Technical Field

The utility model belongs to the technical field of sealing, and relates to a through hole hydraulic sealing device.

Background

The boiler is used as common pressurized equipment and widely applied to heat supply, gas supply and heating projects, the header is used as an important pressurized part in the boiler, the header is generally of a cylindrical structure and generally cannot enter the boiler, the header is used for collecting and distributing steam-water mixture or saturated steam in a heating surface pipe, an ascending pipe and a descending pipe are connected to form a natural circulation loop, the natural circulation loop receives water supplied by an economizer, the steam is conveyed to a superheater, a certain heat storage capacity is used for storage, when the working condition changes, the steam pressure change speed is slowed down, and the operation regulation of the boiler is facilitated. The distribution and collection of working media are realized by assembling pipe joints and connecting pipes through pipe holes on the header, and the header can leave a factory only after a hydrostatic test is qualified as a pressure element. In order to ensure the hydraulic test, the pipe holes of the non-welded pipe and the pipe seat which leave the factory need to be processed by punching after the hydraulic test is qualified, and the position and the size of the pipe holes need to be rechecked. For pipe holes with large sizes of pressed parts and lacking machining space at the positions of the holes, the water pressure pipe holes can only be polished by manual gas cutting, the accuracy and the quality of the holes cannot be guaranteed, or only the design structure can be modified, and extra pipe joints, bent pipes and other welding parts are added.

Disclosure of Invention

The utility model aims to provide a through hole hydraulic pressure sealing device which effectively utilizes a counter bore and a through hole machining surface after pipe hole machining and solves the problems of roughness, large deviation, difficulty in grinding, difficulty in quality guarantee and the like during gas cutting machining.

According to the technical scheme provided by the utility model: the utility model provides a through-hole hydraulic pressure sealing device, includes the handle axle, is equipped with flexible card hole mechanism in the handle axle, and supreme cover in proper order is established sealing washer, gland from down in the handle axle periphery, and the handle cover is established to handle axle upper portion cover, and seal ring is established to the cover between handle cover lower extreme and the gland.

As a further improvement of the utility model, a telescopic clamping hole mechanism installation cavity is arranged in the handle shaft, the telescopic clamping hole mechanism installation cavity comprises a telescopic cavity and a mandrel cavity, the telescopic clamping hole mechanism comprises a mandrel, a gear and a slide block, the mandrel is rotatably installed in the telescopic clamping hole mechanism mandrel cavity, the lower part of the mandrel is connected with the gear, two slide blocks are arranged on the periphery of the gear by taking the mandrel as a circle center array, one end of each slide block is a rack, the rack is meshed with the gear, the other end of each slide block is a clamping hole end, and the two slide blocks are slidably installed in the telescopic cavity of the telescopic clamping hole mechanism.

As a further improvement of the utility model, the telescopic cavity of the telescopic clamping hole mechanism is communicated with the core shaft cavity, and the length axes are vertical to each other; the two ends of the telescopic cavity are communicated with the outside, and one end of the mandrel cavity is communicated with the outside.

As a further improvement of the utility model, the periphery of the handle shaft is provided with a sealing ring mounting and positioning shaft section and a sealing ring bearing surface, and the sealing ring mounting and positioning shaft section is an external conical surface and is matched and positioned with an internal conical hole of the sealing ring.

As a further improvement of the utility model, the upper part of the outer end of the clamping hole end of the sliding block is provided with a chamfer inclined plane.

As a further improvement of the utility model, the handle sleeve is sleeved on the upper part of the handle shaft through a thread structure, external threads are arranged on the periphery of the handle shaft, the end part of the handle sleeve is provided with a blind hole structure, the bottom of the blind hole is higher than the upper end of the core shaft, and internal threads are arranged on the inner wall of the blind hole and matched with the external threads of the handle shaft.

As a further improvement of the utility model, the lower part of the outer part of the handle sleeve is provided with an outer hexagonal structure.

As a further improvement of the utility model, the telescopic cavity of the telescopic clamping hole mechanism is in sliding clearance fit with the two sliding blocks, and the core shaft cavity is in rotating clearance fit with the core shaft

As a further improvement of the utility model, the upper end of the mandrel is larger than the inner diameter of the cavity of the mandrel, the handle shaft extends out, and the extending part can adopt an inner hexagonal hole or an outer hexagonal structure.

As a further improvement of the utility model, the hole wall of the upper part of the handle shaft is provided with a screw hole, a set screw is arranged in the screw hole, and the core shaft in the core shaft cavity can be locked.

The positive progress effect of this application lies in:

1. the utility model has compact integral structure, simple manufacture and installation, convenient maintenance and good sealing performance; 2. the sealing mode of only passing in and out of the through hole is adopted, so that the applicability is wide; 3. the handle shaft is matched with the conical surface of the sealing ring, so that the applicability and the sealing effect are good; 4. the gear and rack meshing structure is stable in sliding, good in synchronism, convenient to purchase and assemble and high in feasibility; 5. the operating structure is held outside the hole, so that the operation is convenient and light; 6. the mandrel screw locking structure increases the adaptability and operability of sealing of pipe holes in different directions.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view a-a of fig. 1.

FIG. 3 is a schematic view of a workpiece according to the present invention.

Fig. 4 is a schematic view of the construction of the stem of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make those skilled in the art better understand the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the utility model herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover such processes, methods, systems, articles, or apparatus that comprise a list of steps or elements, are not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such processes, methods, articles, or apparatus.

In the figures 1-4, the device comprises a handle shaft 1, a gear 2, a sealing ring 3, a screw 4, a set screw 5, a core shaft 6, a handle sleeve 7, a sealing washer 8, a gland 9, a slide block 10, a rack 10-1, a hole clamping end 10-2, a workpiece 11 and the like.

As shown in figure 1, the utility model relates to a through hole hydraulic sealing device which comprises a handle shaft 1, wherein a telescopic hole clamping mechanism is arranged in the handle shaft 1, a sealing ring 3 and a gland 9 are sequentially sleeved on the periphery of the handle shaft 1 from bottom to top, a handle sleeve 7 is sleeved on the upper part of the handle shaft 1, and a sealing gasket 8 is sleeved between the lower end of the handle sleeve 7 and the gland 9 for sealing.

As shown in fig. 4, a telescopic hole-clamping mechanism installation cavity is arranged in the handle shaft 1, the telescopic hole-clamping mechanism installation cavity comprises a telescopic cavity 1-1 and a mandrel cavity 1-3 which are communicated with each other, and the length axes are vertical to each other; two ends of the telescopic cavity 1-1 are communicated with the outside, and one end of the mandrel cavity 1-3 is communicated with the outside; the telescopic clamping hole mechanism comprises a mandrel 6, a gear 2 and two sliders 10, the mandrel 6 is rotatably installed in a mandrel cavity 1-3 of the telescopic clamping hole mechanism, the gear 2 is connected with the lower portion of the mandrel 6 through screws, the two sliders 10 are arranged on the periphery of the gear 2 by taking the gear as a circle center array, one end of each slider 10 is a rack 10-1, the racks 10-1 are meshed with the gear 2, the other end of each slider 10 is a clamping hole end 10-2, and the two sliders 10 are slidably installed in the telescopic cavity of the telescopic clamping hole mechanism. The periphery of the handle shaft 1 is provided with a sealing ring mounting and positioning shaft section 1-4 and a sealing ring bearing surface 1-5. The sealing ring mounting and positioning shaft sections 1-4 are external conical surfaces and are matched and positioned with the inner conical holes of the sealing ring 3.

The mandrel 6 is rotated, the two sliding blocks 10 are driven to move oppositely or oppositely through the gear 2, and when the sliding blocks 10 move relatively to the extreme position, the clamping hole ends 10-2 on the sliding blocks 10 do not exceed the outer peripheral surface of the handle shaft 1; the upper part of the outer end of the clamping hole end 10-2 is provided with a chamfer inclined plane, so that the stable supporting contact with the inner wall of the workpiece is enhanced.

The upper portion of the handle shaft 1 is sleeved with a handle sleeve 7 through a thread structure, external threads 1-2 are arranged on the periphery of the handle shaft 1, the lower end of the handle sleeve 7 is of a closed blind hole structure, the bottom of the blind hole is higher than the upper end of the mandrel 6, and internal threads matched with the external threads 1-2 of the handle shaft 1 are arranged on the inner wall of the blind hole. The outer lower part of the handle sleeve 7 is provided with an outer hexagonal structure, so that the handle sleeve 7 can be conveniently rotated.

The lower part of the mandrel 6 is detachably connected with the gear 2 through a screw 4, so that the gear 2 of the quick-wear part can be replaced conveniently.

The mandrel cavity 1-3 of the telescopic hole clamping mechanism is in small clearance fit with the upper end and the lower end of the mandrel 6, so that the shaking of the mandrel 6 in the mandrel cavity 1-3 of the handle shaft 1 is effectively controlled, and the processing difficulty is reduced.

The upper end of the mandrel 6 is larger than the inner diameter of the mandrel cavity 1-3 and extends out of the handle shaft 1, and the extending part can adopt an inner hexagonal hole or an outer hexagonal structure, so that tools such as a wrench and the like can be conveniently used for rotating.

The hole wall of the upper part of the handle shaft 1 is provided with a screw hole, a set screw 5 is arranged in the screw hole, and an inner mandrel 6 in a mandrel cavity 1-3 can be locked, so that the telescopic clamping hole mechanism is in a stable state.

The outer diameter of the lower end of the arbor 1 is slightly smaller than the inner diameter of the through hole 11-2 of the workpiece 11, and can extend into the workpiece 11 through the through hole 11-2.

The sealing ring 3 is of a stepped shaft structure, rubber elastic material is sleeved on the handle shaft 1, the outer diameter of the sealing ring is slightly smaller than the diameter 11-2 of the through hole and the diameter 11-1 of the counter bore, the conical surface of the inner bore is matched with the outer conical surface of the outer sealing ring mounting shaft section 1-4 of the handle shaft 1, and the sealing ring is tightly positioned and contacted.

The gland 9 is sleeved on the handle shaft 1, the sealing ring 3 is wrapped outside the cavity structure, and the sealing ring 3 is tightly pressed through the threaded fit of the handle sleeve 7 and the external threads 1-2 of the handle shaft 1.

And the sealing washer 8 and the rubber elastic material are sleeved on the handle shaft 1 and arranged between the handle sleeve 7 and the gland 9, and are tightly fastened and pressed through the thread fit of the handle sleeve 7 and the external threads 1-2 of the handle shaft 1, so that leakage is further prevented.

The working process of the utility model is as follows:

checking and confirming the assembling condition of the device: the handle shaft 1, the sliding block 10, the mandrel 6 and the gear 2 are assembled into a whole according to requirements, the upper end of the mandrel 6 is rotated, when the sliding block 10 is checked to be located at the innermost end initial position, the periphery of the clamping hole end 10-2 does not exceed the peripheral surface of the handle shaft, and synchronous sliding is flexible. After the sliding block 10 is kept at the initial position of the innermost end, the lower end of the handle shaft 1 penetrates through the through hole 11-2 from the outside to enter the workpiece 11, after the telescopic cavity 1-1 is kept in the workpiece 11 and exceeds the inner wall of the workpiece for a proper distance, a tool such as a wrench is used for rotating the upper end of the mandrel 6, the gear 2 drives the rack 10-1, the sliding block 10 slides out to a proper position, and the upper end of the handle shaft 1 is fastened and the set screw 5 locks the mandrel 6. Outwards tensioning the handle shaft 1 to enable the hole clamping ends 10-2 on the sliding blocks 10 on the two sides to abut against the inner wall of the workpiece 11, then sequentially sleeving the sealing ring 3, the gland 9 and the sealing washer 8, paying attention to the fact that the profile of the lower end face of the gland 9 is basically consistent with the arc shape of the outer wall of the workpiece, sleeving the handle sleeve 7, and rotating the handle sleeve 7 by using a tool such as a wrench to tightly press the sealing washer 8, the gland 9 and the sealing ring 3 to enable the sealing ring 3 to be extruded to closely contact with the through hole of the counter bore.

In order to prevent a workpiece 11 from being filled with water and subjected to a hydraulic test, a part of water enters the telescopic cavity 1-1 and the mandrel cavity 1-3 of the telescopic hole clamping mechanism through gaps among the handle shaft 1, the sliding block 10 and the mandrel 6 and overflows into the handle sleeve 7 and further overflows out of the handle shaft 1, and the sealing washer 8 is arranged to seal the gap between the handle sleeve 7 and the handle shaft 1 so as to further prevent leakage.

After the water pressure is finished, the lower handle sleeve 7 is unscrewed and disassembled, the set screw 5 is loosened, the upper end of the mandrel 6 is reversely rotated, and the taking-down device is pulled out after the sliding block 10 retracts to the initial position in the handle shaft 1.

The device has compact integral structure, simple manufacture and installation, convenient maintenance and good sealing performance, can be suitable for hydraulic sealing of the through hole with the thin-wall counter bore structure after the counter bore and the through hole surface are machined, effectively utilizes the machined surface of the counter bore and the through hole after the pipe hole is machined, solves the problems of roughness, large deviation, difficult grinding and difficult quality guarantee during gas cutting machining, slightly modifies the shape of the step end surface of the sealing ring 3 at the position tightly contacting the counter bore surface 11-3 for the thick-wall through hole without the counter bore structure, ensures that the step end surface of the sealing ring is well contacted with the outer peripheral surface 11-4 at the position of the pipe hole of a workpiece, or changes the step structure into a cylindrical surface instead of the step structure, directly compresses the periphery of the pipe hole of the workpiece by adopting the gland 9, and the like.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.

Claims

1. The utility model provides a through-hole hydraulic pressure sealing device, its characterized in that includes handle axle (1), is equipped with flexible card hole mechanism in handle axle (1), and supreme cover is in proper order established sealing washer (3), gland (9) from down in handle axle (1) periphery, and handle cover (7) are established to handle axle (1) upper portion cover, and seal ring (8) are established to the cover between handle cover (7) lower extreme and gland (9).

2. The through hole hydraulic sealing device according to claim 1, wherein a telescopic clamping hole mechanism installation cavity is arranged in the handle shaft (1), the telescopic clamping hole mechanism installation cavity comprises a telescopic cavity (1-1) and a mandrel cavity (1-3), the telescopic clamping hole mechanism comprises a mandrel (6), a gear (2) and a sliding block (10), the mandrel (6) is rotatably installed in the telescopic clamping hole mechanism mandrel cavity (1-3), the lower part of the mandrel (6) is connected with the gear (2), two sliding blocks (10) are arranged on the periphery of the gear (2) by taking the gear as a circle center array, one end of each sliding block (10) is a rack (10-1) and is meshed with the gear (2), and the other end of each sliding block (10) is a clamping hole end (10-2); two sliding blocks (10) are slidably arranged in the telescopic cavity of the telescopic clamping hole mechanism.

3. The through-hole hydraulic sealing device according to claim 2, wherein the telescopic cavity (1-1) of the telescopic clamping hole mechanism is communicated with the mandrel cavity (1-3), and the length axes are vertical to each other; two ends of the telescopic cavity (1-1) are communicated with the outside, and one end of the mandrel cavity (1-3) is communicated with the outside.

4. The through-hole hydraulic sealing device according to claim 1, wherein the stem (1) is provided at its outer periphery with a seal ring mounting and positioning shaft segment (1-4) and a seal ring bearing surface (1-5), and the seal ring mounting and positioning shaft segment (1-4) has an outer conical surface for cooperating with an inner conical hole of the seal ring (3) for positioning.

5. The hydraulic through-hole sealing device according to claim 2, wherein the upper portion of the outer end of the bayonet end (10-2) is chamfered.

6. The through hole hydraulic pressure sealing device according to claim 1, wherein the handle sleeve (7) is sleeved on the upper portion of the handle shaft (1) through a thread structure, the outer periphery of the handle shaft (1) is provided with external threads (1-2), the lower end of the handle sleeve (7) is of a closed blind hole structure, the bottom of the blind hole is higher than the upper end of the mandrel (6), and the inner wall of the blind hole is provided with internal threads matched with the external threads (1-2) of the handle shaft (1).

7. The hydraulic through-hole sealing device according to claim 1, wherein the handle sleeve (7) is provided with an outer hexagonal structure at the outer lower part.

8. The through hole hydraulic sealing device according to claim 2, wherein the telescopic cavity (1-1) of the telescopic clamping hole mechanism is in sliding clearance fit with the two sliding blocks (10), and the mandrel cavity (1-3) is in rotating clearance fit with the mandrel (6).

9. The through-hole hydraulic sealing device according to claim 8, wherein the upper end of the mandrel (6) is larger than the inner diameter of the mandrel cavity (1-3), and extends out of the handle shaft (1), and the extending part can be of a hexagon socket or a hexagon outer structure.

10. A through-hole hydraulic sealing arrangement according to claim 1, characterized in that the upper hole wall of the shank (1) is provided with a screw hole in which a set screw (5) is mounted for locking the inner spindle (6) of the spindle cavity (1-3).