Rotating equipment pipe connecting device capable of being rapidly repaired
The mechanical seal structure and snap ring limiting installation design solve the problem of easy damage to rotary joint seals, enabling rapid repair and replacement, improving sealing performance and stability, and making it suitable for conveying various media.
Patent Information
- Application Number
- CN202520415491.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-03-11
AI Technical Summary
The seals of existing rotary joints are prone to wear, resulting in poor sealing performance, short service life, difficulty in quick repair, and difficulty in replacement, which affects production efficiency and economic benefits.
It adopts a mechanical seal structure, with the stationary ring and the rotating ring being limited by snap rings. The bearing of the rotating shaft is located outside the mechanical seal. The shell is designed with openings at both ends to facilitate the disassembly and replacement of the seals and avoid the use of adhesives.
It enables rapid repair and replacement of seals, extends service life, improves sealing performance and stability, has a wide range of applications, and reduces equipment downtime and maintenance costs.
Smart Images
Figure CN223609578U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipeline connection technical field, especially a kind of rotating equipment pipe connecting device of quick repair. BACKGROUND
[0002] In the liquid delivery process, pipeline needs to be used, and the general pipeline is connected with pipeline to deliver fluid, and the pipeline needs to be fixedly connected to deliver the pipeline.
[0003] When a stationary pipeline needs to deliver another rotating pipeline or equipment, the commonly used pipeline connection method cannot be used. There are some rotating joints now, which can deliver liquid, especially high-speed rotating joints, which can be used for liquid delivery between fixed pipeline and rotating pipeline.
[0004] However, this pipeline delivery has obvious shortcomings. In order to ensure the sealing, the rotating joint needs to be sealed, especially the gap between the fixed pipe and the rotating pipe, which needs to use a sealing element. Generally, graphite ring is used as dynamic ring, and common rubber sealing ring is used as static ring to realize sealing. This sealing structure is easy to wear, has poor sealing effect, short service life, cannot be used twice after damage, and cannot be quickly repaired, which stops the production line of the production enterprise and has no good economic benefit. The general form of sealing has the above-mentioned shortcomings such as selectivity to fluid and narrow use range. This sealing is divided into simple dynamic ring part and static ring part, and the static ring is difficult to install, and can only be bonded with the outer ring of the static ring and the inside of the pipeline with adhesive. It also needs to ensure the hydraulic pressure bearing force of the static ring to the inside of the pipeline. The adhesive is easy to react with oil or other liquids, and the fluid has too many impurities, which will cause the sealing function of this high-speed rotating joint to be easily damaged and leak.
[0005] The sealing element inside the high-speed rotating structure is the most easily damaged part, and needs to be replaced frequently once it leaks. The existing sealing element is fixed inside the pipeline as much as possible, which makes it difficult to replace, especially the sealing element bonded with adhesive, which is basically impossible to replace again.
[0006] Therefore, the utility model designs a rotating equipment pipe connecting device that can be quickly repaired to solve the above problems. UTILITY MODEL CONTENTS
[0007] The utility model discloses a kind of fast repairable rotating equipment pipe connecting device, the mechanical seal of the device is increased, and the pipe shell is divided into front and rear two end cavities, the rear end opening of rotating shaft is guided in the cavity filled with liquid, and the front end of rotating shaft is stretched outside the pipe shell;The device also increases bearing, so that rotating shaft can rotate at high speed in the pipe shell, and bearing is in the external cavity of mechanical seal, can conveniently bearing rotate smoothly in non medium environment, effectively reduce the possibility of medium pollution, and the static ring and dynamic ring of the device are installed by snap spring limiting clamping, convenient to disassemble and assemble, and the pipe shell both ends are open, convenient for mechanical seal to be disassembled from both ends, to replace sealing element conveniently.
[0008] The utility model is implemented as follows: a kind of fast repairable rotating equipment pipe connecting device, comprising:
[0009] Pipe shell, rotating shaft, sealing plug and mechanical seal;
[0010] The pipe shell is hollow round pipe, the pipe shell both ends are open, liquid injection pipe is arranged on the lateral wall of the pipe shell, the liquid injection pipe is communicated with the inside of pipe shell, and the pipe shell is communicated with external liquid pipeline by liquid injection pipe;
[0011] The sealing plug is cylindrical pipeline plug with thread, and the sealing plug is tightly sealed in the rear end opening of pipe shell.
[0012] The rotating shaft is circular stepped shaft, and liquid guide hole is arranged in the inside of rotating shaft, and the liquid guide hole penetrates the front and rear ends of rotating shaft.
[0013] Bearing is clamped on the rotating shaft, and the rotating shaft is rotatably inserted in the pipe shell by bearing.
[0014] Mechanical seal is further sleeved on the outside of rotating shaft, the mechanical seal is arranged at the rear end of bearing, and the mechanical seal is tightly arranged between bearing and sealing plug;The pipe shell is isolated by mechanical seal to form rear end cavity and rear end cavity respectively.
[0015] The liquid injection pipe and liquid guide hole are communicated with the rear end cavity of pipe shell;The front end of rotating shaft is stretched outside the front end opening of pipe shell.
[0016] Further, the mechanical seal includes dynamic ring and static ring, and the sealing surfaces of the dynamic ring and the static ring are mutually adhered to rotate sealing;
[0017] The dynamic ring is sleeved on the rotating shaft, the static ring is locked inside the pipe shell, and the dynamic ring and the static ring are mutually tightly sealed.
[0018] The static ring is at the front end of liquid injection pipe.
[0019] Further, the pipe shell is internally provided with a positioning groove, the positioning groove is a stepped groove, the static ring is stably clamped in the positioning groove through a snap spring;
[0020] The positioning groove and the static ring are in interference fit through a sealing ring.
[0021] Further, the pipe shell front end opening is also provided with a snap spring, and the bearing and the rotating shaft are also stably clamped with the pipe shell through separate snap springs.
[0022] Further, the liquid injection pipe and the pipe shell are sealingly welded as an integral structure.
[0023] The beneficial effects of the utility model are: 1, the device is sealed and clamped in the pipe shell through the static ring, and the dynamic ring is clamped on the rotating shaft, and the bearing is abutted on the outer part of the dynamic ring for limiting, so that the dynamic ring and the static ring are stably clamped, the rotating shaft is installed in the pipe shell more conveniently, and when disassembling, only the snap spring needs to be removed, the mechanical seal can be removed and replaced, convenient to use, and because the mechanical seal is used for sealing, other sealing members for friction with the rotating shaft are not needed, the sealing property and use period of the sealing structure of the device are greatly increased;
[0024] 2, the mechanical seal and the bearing used in the device can be disassembled together with the rotating shaft, and the whole sealing structure and the bearing can be disassembled from the pipe shell, so that all rotating parts can be conveniently disassembled and replaced, and the device is more convenient to use, the pipe shell of the device is open at both ends, not only can the rotating shaft be pushed and pulled under stress, but also the dynamic ring and the static ring can be disassembled from both ends, so that the pipe can pass through the device, and the purpose of quickly repairing and restoring production is achieved;
[0025] 3, the rotating parts of the device are not connected in a mutual splicing mode, but are connected in a mutual sleeving mode, and the bearing is used as a general part to combine, so that the sleeving and rotating mode of the rotating shaft and the pipe shell is more stable, the cooperation is more stable, the bearing is not in the liquid medium, and a special structure is not needed, so that the device has strong universality and replaceability, and because the medium is enclosed in the cavity at the rear end of the pipe shell, the use environment of the bearing and the liquid medium do not affect each other, so that the device can be applied to more kinds of different medium rotating conveying. BRIEF DESCRIPTION OF DRAWINGS
[0026] The utility model will be further described in connection with the embodiments with reference to the drawings.
[0027] Fig. 1 It is a front end structure schematic diagram of the utility model whole assembly state.
[0028] Fig. 2 It is a rear end structure schematic diagram of the utility model whole assembly state.
[0029] Fig. 3 It is the front end perspective structure schematic diagram of the split state of the utility model;
[0030] Fig. 4 It is the rotating shaft structure schematic diagram of the utility model;
[0031] Fig. 5 It is the rear end perspective structure schematic diagram of the split state of the utility model.
[0032] In the drawings, the component list represented by each sign is as follows:
[0033] 1 - pipe shell, 11 - liquid injection pipe, 12 - positioning groove, 2 - rotating shaft, 21 - liquid guide hole, 3 - moving ring, 31 - static ring, 32 - bearing, 4 - sealing plug, 41 - clasp spring. DETAILED DESCRIPTION
[0034] Please refer to Figs. 1 to 5 The utility model provides a kind of rotating equipment connecting pipe device of quick repair, to better understand the above technical solution, the above technical solution will be explained in detail in the following by combining with the drawings of the specification and specific implementation.
[0035] In one specific embodiment of the utility model technical solution:
[0036] Including pipe shell 1, rotating shaft 2, sealing plug 4 and mechanical seal;
[0037] Pipe shell 1 is hollow round pipe, the both ends of pipe shell 1 are open, and the side wall of pipe shell 1 is provided with liquid injection pipe 11, which is in communication with the inside of pipe shell 1, and pipe shell 1 is in communication with external liquid medium through liquid injection pipe 11;Liquid injection pipe 11 and pipe shell 1 are sealingly welded as a whole structure, which is convenient for connecting with water supply pipeline, and can also guide and transport medium to both ends.
[0038] Positioning groove 12 is arranged in the inside of pipe shell 1, and positioning groove 12 is a stepped groove;Static ring 31 is stably clamped in positioning groove 12 by clasp spring 41, and clasp spring 41 is used to limit the axial movement of static ring 31, to ensure that static ring 31 remains position fixed in pipe shell 1, and a sealing ring is also clamped in positioning groove 12, static ring 31 and positioning groove 12 are extruded to form a sealing structure by the sealing ring, and the sealing ring forms elastic interference fit between static ring 31 and positioning groove 12, so that the required sealing effect is achieved between static ring 31 and pipe shell 1, and static ring 31 remains stationary, and only static fit is needed for sealing performance;
[0039] The positioning groove 12 and the static ring 31 are in interference fit through a sealing ring, the static ring 31 is tightly pressed on the positioning groove 12 through the spring of the dynamic ring 3, the spring is arranged on the dynamic ring 3, and the static ring 31 is clamped between the sealing plug 4 and the dynamic ring. The rotating shaft 2 and the mechanical seal are both installed in the pipe shell 1, and the pipe shell 1 is divided into front and rear cavities.
[0040] The sealing plug 4 is a cylindrical pipeline plug with threads, and the sealing plug 4 is tightly sealed at the rear end opening of the pipe shell 1.
[0041] The rotating shaft 2 is a circular stepped shaft, and a liquid guide hole 21 is arranged in the rotating shaft 2 and penetrates the front and rear ends of the rotating shaft 2.
[0042] The rotating shaft 2 is clamped with a bearing 32, and the rotating shaft 2 is rotatably inserted into the pipe shell 1 through the bearing 32.
[0043] The rotating shaft 2 is further sleeved with a mechanical seal, the mechanical seal is arranged at the rear end of the bearing 32, and the mechanical seal is tightly pressed between the bearing 32 and the sealing plug 4; the pipe shell 1 is isolated by the mechanical seal to form a rear cavity and a front cavity.
[0044] The front end opening of the pipe shell 1 is also provided with a clamping spring 41, and the bearing 32 and the rotating shaft 2 are also stably clamped with the pipe shell 1 through a separate clamping spring 41, the clamping spring 41 limits the axial displacement of each component, and ensures the stability of the structure after installation.
[0045] The liquid injection pipe 11 and the liquid guide hole 21 are both in communication with the rear cavity of the pipe shell 1; the front end of the rotating shaft 2 protrudes outside the front end opening of the pipe shell 1; the front end of the liquid guide hole 21 protrudes outside the front end of the pipe shell 1, so that the water flow from the rear cavity of the pipe shell 1 is guided along the front end of the liquid guide hole 21, and the front cavity of the pipe shell 1 is not in communication with the main water pipe 11, so that the front cavity of the pipe shell 1 is in a dry environment; when other pipelines need to be installed, the sealing plug 4 is opened, and the static pipeline is connected at the rear end opening of the pipe shell 1, so that the liquid injection pipe 11, the liquid guide hole 21 and the rear end opening of the pipe shell 1 are in communication with each other to form an interconnected pipeline.
[0046] The mechanical seal includes a dynamic ring 3 and a static ring 31, and the sealing surfaces of the dynamic ring 3 and the static ring 31 are tightly sealed in rotation; the dynamic ring 3 is sleeved on the rotating shaft 2, the static ring 31 is locked inside the pipe shell 1, and the dynamic ring 3 and the static ring 31 are tightly sealed; the static ring 31 is at the front end of the liquid injection pipe 11, so that the sealing surfaces of the static ring 31 and the dynamic ring 3 are at the front end of the liquid injection pipe 11, and the rear end openings of the liquid injection pipe 11 and the liquid guide hole 21 are closed in the rear cavity for communication.
[0047] It should be noted that:
[0048] 1. The tube shell 1 of this device is open at both ends, which makes it easier to install the stationary ring 31 from the rear opening. The operation of snapping the retaining ring 41 at the rear end of the stationary ring 31 can also be performed from the opening of the sealing plug 4. This device does not use any adhesives and is assembled entirely by mechanical structure, which makes assembly more convenient. Moreover, because of the use of adhesives, disassembling the seal will completely destroy the water-conducting shaft tube and damage the entire outer surface of the shaft tube. This will likely result in the rotating shaft 2 being unable to be tightly spliced with the seal and unable to be reused. However, this device does not use adhesives, making it easier to disassemble the mechanical seal. This allows the device to be disassembled without damage, thus enabling it to be reused.
[0049] 2. The stationary ring 31 of this device is clamped inside the shell 1. The sealing surfaces of the stationary ring 31 and the rotating ring 3 isolate the bearing 32, thus separating the medium and the bearing 32 into two sealed cavities. The bearing 32 is exposed to the outside, which makes it easy to add and apply grease, resulting in better lubrication of the bearing 32. It also makes it easier to inspect and maintain the bearing and other external structures. Moreover, the mechanical seal of this device can be a standard part, which does not require re-grinding and modification. The disassembly, assembly and replacement of standard parts can be done by taking spare parts, which is more convenient.
[0050] 3. Because this device also includes a sealing plug 4, which can be removed, the rear end of the tube shell 1 can be threaded to another pipe, that is, other pipes can be installed to replace the sealing plug 4, so that the injection pipe 11 can simultaneously transport liquid to the pipe connected to the water guide pipe 21 at the front end of the rotating shaft 2, and can also facilitate the simultaneous transport to another pipe, making it more flexible to use.
[0051] In use, when the medium is injected into the rear cavity of the tube shell 1 through the injection pipe 11, the medium is at the rear end of the friction surfaces of the sealing plug 4 and the mechanical seal, namely the friction surfaces of the moving ring 3 and the stationary ring 31. The rotating shaft 2 has a liquid guide hole 21 inside, and the rear end of the liquid guide hole 21 extends into the rear cavity of the tube shell 1 and communicates with the injection pipe 11. The moving ring 3 and the rotating shaft 2 are sealed together by forming an interference fit with the rotating shaft 2 through the sealing ring. At the same time, the moving ring 3 is also synchronously driven with the rotating shaft 2 by bolts or splines, and the moving ring 3 is restricted from moving outward by the snap ring 41. The inner end face of the moving ring 3 is the friction surface that is in contact with the stationary ring 31, and the rear end face of the moving ring 3 is pressed against the stationary ring 31 by its own spring, so that the axial position is kept fixed. The stationary ring 31 does not contact the rotating shaft 2, and the stationary ring 31 and the moving ring 3 are kept in contact and sealed. The axial movement of the rotating ring 3 and the stationary ring of the entire mechanical seal is restricted by the snap rings 41 at both ends, and the spring of the rotating ring 3 makes the two elastically press together to form a sealing effect.
[0052] The medium flows into the rear cavity of the pipe shell 1 from the liquid injection pipe 11, and the dynamic ring 3 and the static ring 31 seal the medium, so that the medium cannot flow out from the outside of the rotating shaft 2, and the medium can only flow out from the inside of the liquid guide hole 21 to the front end. The bearing 32 is provided with two bearings, and the two bearings are located in the pipe shell 1 in front of the dynamic ring 3, so that the bearing 32 is isolated from the outside of the medium. The bearing carries the rotating shaft 2 to rotate, the dynamic ring 3 rotates with the rotating shaft 2, and the dynamic ring 3 rotates and is attached to the static ring 31 to form a sealing surface.
[0053] Thus, the rotating shaft 2 and the pipe shell 1 are rotatably connected in a sealed manner, so that the liquid guide hole 21 in the rotating shaft 2 is guided, and the pipe shell 1 is convenient to disassemble and assemble.
[0054] When a pipe needs to be connected to the rear end of the pipe shell 1 again, the sealing plug 4 is removed, and a pipe is connected through a threaded connection. The device is flexible and convenient to use.
[0055] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that the specific examples described are only illustrative, and are not used to limit the scope of the utility model. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the utility model should be covered within the scope of the claims of the utility model.
Claims
1. A quick repairable rotating equipment connection device, characterized in that, The utility model relates to a kind of mechanical seal structure of liquid injection pipe, including: Shell (1), rotating shaft (2), sealing plug (4) and mechanical seal; The shell (1) is hollow pipe, the both ends of the shell (1) are open, the sidewall of the shell (1) is provided with liquid injection pipe (11), the liquid injection pipe (11) is communicated with the inside of shell (1), the shell (1) is communicated with external liquid pipeline by liquid injection pipe (11); The sealing plug (4) is a cylindrical pipe plug with threads, the sealing plug (4) is tightly sealed in the rear end opening of the shell (1); The rotating shaft (2) is a circular stepped shaft, the inside of the rotating shaft (2) is provided with a liquid guide hole (21), the liquid guide hole (21) penetrates the front and rear ends of the rotating shaft (2); The rotating shaft (2) is clamped with a bearing (32), the rotating shaft (2) is rotatably inserted into the shell (1) through the bearing (32); The rotating shaft (2) is further provided with a mechanical seal, the mechanical seal is arranged at the rear end of the bearing (32), and the mechanical seal is tightly arranged between the bearing (32) and the sealing plug (4);The shell (1) is separated into a rear cavity and a rear cavity by the mechanical seal; The liquid injection pipe (11) and the liquid guide hole (21) are communicated with the rear cavity of the shell (1);The front end of the rotating shaft (2) extends outside the front end opening of the shell (1).
2. A rotating equipment connection device according to claim 1, wherein: The mechanical seal includes a dynamic ring (3) and a static ring (31), the sealing surfaces of the dynamic ring (3) and the static ring (31) are tightly attached to each other for rotary sealing; The dynamic ring (3) is sleeved on the rotating shaft (2), the static ring (31) is locked inside the shell (1), and the dynamic ring (3) and the static ring (31) are tightly sealed against each other; The static ring (31) is located at the front end of the liquid injection pipe (11).
3. A rotating equipment connection device according to claim 2, wherein: The shell (1) is provided with a positioning groove (12) inside, the positioning groove (12) is a stepped groove, and the static ring (31) is stably clamped in the positioning groove (12) by a snap spring (41); The positioning groove (12) and the static ring (31) are in interference fit through a sealing ring.
4. A rotating equipment connection device according to claim 1, wherein: The front end opening of the shell (1) is also provided with a snap spring (41), and the bearing (32) and the rotating shaft (2) are also stably clamped with the shell (1) by separate snap springs (41).
5. A rotating equipment connection device according to claim 1, wherein: The liquid injection pipe (11) and the shell (1) are sealingly welded as a whole structure.