Quick-release mechanical seal plugging device

Abstract

The utility model discloses a quick release type mechanical seal plugging device which comprises a mechanical seal body, a plurality of pipe orifices are fixedly arranged on the periphery of the mechanical seal body, one end of a screw is in threaded connection with the interiors of the pipe orifices, and a flexible sealing sleeve is fixedly sleeved on the outer wall of the screw. The other end of the screw rod is fixedly provided with a pressing assembly used for pressing the flexible sealing sleeve on the outer end face of the mechanical sealing body. The flexible sealing sleeve is arranged on the screw rod, and the flexible sealing sleeve is pressed through the pressing cushion block with the same curvature as the outer end face of the mechanical sealing body, so that possible leakage points on the surface of the screw rod and the surface of the mechanical sealing body are completely sealed, the sealing effect is good, disassembly is easy, only the screw rod needs to be screwed out, and the sealing effect is good. And the reutilization is easy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical seal auxiliary tool, in particular to a quick-release mechanical seal plugging device. BACKGROUND

[0002] Mechanical seal is a kind of sealing device commonly used in industrial equipment, mainly used to prevent medium (such as liquid or gas) from leaking from the shaft end of rotating equipment. It is usually applied to pumps, compressors and stirring equipment and other devices that need to isolate the internal sealing medium from the outside, especially when dealing with corrosive, dangerous or expensive medium.

[0003] In the design of mechanical seal, several auxiliary pipe mouths are designed on the sealing structure. These pipe mouths are usually used to connect auxiliary systems or devices, such as flushing, cooling, isolation gas or sealing liquid injection, to maintain the effectiveness of the seal and prolong the service life. These auxiliary systems enter the sealing cavity through the pipe mouth to help control temperature, pressure, medium flow, etc.

[0004] In the prior art, in order to prevent the leakage of sealing medium, the auxiliary pipe mouths need to be plugged with plugs during factory test and use. The most commonly used method is to wrap sealing tape or apply sealing glue on the screw. The sealing tape is easy to slip off the thread during screw rotation, and the sealing effect is poor. After applying sealing glue, it is difficult to disassemble, and there is residual hard glue after disassembly, which is not easy to use again.

[0005] Therefore, it is necessary for the inventor to design a new quick-release mechanical seal plugging device to overcome the above problems. SUMMARY

[0006] The main purpose of the present application is to provide a quick-release mechanical seal plugging device to solve the problems of poor sealing effect and difficult reuse of the plugging device in the related art.

[0007] In order to achieve the above purpose, the present application provides a quick-release mechanical seal plugging device, comprising a mechanical seal body, a plurality of pipe mouths are fixedly arranged on the outer periphery of the mechanical seal body, one end of a screw rod is threadedly connected in the pipe mouth, a flexible sealing sleeve is fixedly sleeved on the outer wall of the screw rod, and a pressing assembly for pressing the flexible sealing sleeve tightly on the outer end surface of the mechanical seal body is fixedly arranged at the other end of the screw rod.

[0008] Preferably, the flexible sealing sleeve comprises a sleeving part tightly matched with the outer wall of the screw rod and a pressing part tightly matched with the outer wall of the mechanical seal.

[0009] Preferably, the pressing assembly comprises a pressing pad and a nut, the pressing pad is sleeved on the outside of the sleeve part, one end of the pressing pad towards the pressing part is provided with a curved end, the curvature of the curved end is same as the curvature of the outer wall of the mechanical seal body, the nut is threadedly connected on the other end of the screw rod and is pressed on the other end surface of the pressing pad.

[0010] Preferably, the inner wall of the sleeve part is fixedly provided with a first sealing ring, and the first sealing ring is pressed on the outer wall of the screw rod.

[0011] Preferably, the middle part of the screw rod matched with the shaft section of the sleeve part is a smooth section, and the two ends of the screw rod are threaded sections.

[0012] Preferably, the pressing part is fixedly provided with a second sealing ring on one side towards the outer wall of the mechanical seal.

[0013] Preferably, the inner hole end of the pressing pad close to one end of the mechanical seal body is provided with an arc chamfer.

[0014] Preferably, the material of the flexible sealing sleeve is rubber.

[0015] Preferably, the first sealing ring and the second sealing ring are integrally formed with the flexible sealing sleeve.

[0016] Compared with the prior art, the quick-release mechanical seal plugging device has the following beneficial effects:

[0017] By arranging the flexible sealing sleeve on the screw rod and pressing the flexible sealing sleeve through the pressing pad with the same curvature as the outer end surface of the mechanical seal body, the possible leakage points on the surface of the screw rod and the surface of the mechanical seal body are completely sealed, the sealing effect is good, and the device is simple to disassemble and reuse, only the screw rod needs to be screwed out. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of this application are used to provide further understanding of this application, so that other features, objects and advantages of this application become more apparent. The illustrative embodiment drawings of this application and the description thereof are used to explain this application, and do not constitute an improper limitation on this application. In the drawings:

[0019] Figure 1 is the overall structure view of the utility model;

[0020] Figure 2 is the overall structure view of the utility model Figure 1 is the enlarged view of the structure at A in the utility model;

[0021] Figure 3 is the overall structure view of the utility model;

[0022] Figure 4 is the utility model Figure 3 structure enlarged view of B place in the middle;

[0023] Figure 5 is the utility model curved surface end structure diagram;

[0024] Figure 6 is the utility model flexible sealing sleeve structure explosion diagram.

[0025] 1, mechanical seal body;2, pipe mouth;3, screw;301, smooth section;302, threaded section;4, flexible sealing sleeve;401, sleeve joint part;402, compression part;5, compression pad;501, curved end;6, nut;7, first sealing ring;8, second sealing ring;9, arc chamfer. DETAILED DESCRIPTION

[0026] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the present application embodiment will be described clearly and completely in the following with the drawings in the present application embodiment, obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without making creative labor should belong to the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] In the present application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Also, the above-mentioned partial terms can be used to represent other meanings in addition to the orientation or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0030] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0031] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] As shown in Figures 1 to 6 A quick-release mechanical seal plugging device, comprising a mechanical seal body, a plurality of pipe mouths are fixedly arranged on the outer periphery of the mechanical seal body, one end of a screw rod is threadedly connected in the pipe mouth, a flexible sealing sleeve is fixedly sleeved on the outer wall of the screw rod, and a pressing assembly for pressing the flexible sealing sleeve against the outer end face of the mechanical seal body is fixedly arranged at the other end of the screw rod; the flexible sealing sleeve comprises a sleeving part tightly matched with the outer wall of the screw rod and a pressing part tightly matched with the outer wall of the mechanical seal; the pressing assembly comprises a pressing pad and a nut, the pressing pad is sleeved outside the sleeving part, one end of the pressing pad towards the pressing part has a curved end, the curvature of the curved end is the same as the curvature of the outer wall of the mechanical seal body, and the nut is threadedly connected at the other end of the screw rod and is pressed against the other end face of the pressing pad.

[0033] Specifically, when a certain pipe opening of the mechanical seal needs to be sealed, the screw rod is first screwed with the pipe opening, however, the sealing performance of the screw connection is not very good, at this time, the flexible sealing sleeve can be sleeved on the outside of the screw rod, the flexible sealing sleeve is tightly fitted with the outer wall of the screw rod, so that the outer end surface of the screw rod is sealed, and then the compression pad is installed on the outside of the flexible sealing sleeve, and the nut is tightened to compress the curved end of the compression pad on the compression part of the flexible sealing sleeve. Since the curvature of the curved end of the compression pad is the same as the curvature of the outer wall of the mechanical seal body, the compression part on the flexible sealing sleeve can be compressed on the outer end surface of the mechanical seal body, so that the outer end surface of the mechanical seal is sealed, and thus the two end surfaces contacted by the flexible sealing sleeve are sealed, effectively avoiding the occurrence of leakage. When disassembled, the screw rod can be directly screwed out of the pipe opening, that is, the disassembly of the entire plugging device is realized. In addition, during actual installation, the flexible sealing sleeve, nut and compression pad can be pre-installed on the screw rod, but not tightened, and then the screw rod is tightened on the pipe opening, and then the sealing ring, compression pad and nut are adjusted until locked. In the embodiment, the flexible sealing sleeve is arranged on the screw rod, and the flexible sealing sleeve is compressed by the compression pad with the same curvature as the outer end surface of the mechanical seal body, so that the possible leakage points of the surface of the screw rod and the surface of the mechanical seal body are completely sealed, the sealing effect is good, and the disassembly is simple, only the screw rod needs to be screwed out, and the flexible sealing sleeve can be easily reused.

[0034] The inner wall of the sleeve joint part is fixedly provided with a first sealing ring, and the first sealing ring is compressed on the outer wall of the screw rod. Specifically, the first sealing ring makes the sealing between the sleeve joint part and the screw rod better, and is not easy to leak.

[0035] The middle part of the screw rod matched with the shaft section of the sleeve joint part is a smooth section, and the two ends of the screw rod are threaded sections. Specifically, the smooth section is used to cooperate with the first sealing ring to avoid leakage due to gaps, and the threads at the two ends are respectively used to threadedly connect with the pipe opening and the nut.

[0036] One side of the compression part towards the outer wall of the mechanical seal is fixedly provided with a second sealing ring. Specifically, the second sealing ring makes the sealing effect of the compression part and the outer surface of the mechanical seal body better, avoiding the occurrence of leakage due to gaps.

[0037] The inner hole end of the compression pad close to one end of the mechanical seal body has an arc chamfer. Specifically, the inner diameter of the compression pad is the same as the outer diameter of the sleeve joint part, and due to the existence of the first sealing ring, when the compression pad is pressed down, if there is no arc chamfer, the resistance that the compression pad receives may be too large, which may cause the outer skin of the sleeve joint part at the height of the first sealing ring to be crushed, which may affect the sealing performance. Therefore, the arc chamfer is arranged to make the compression pad move more smoothly, and the sleeve joint part is not easy to be damaged.

[0038] The material of the flexible sealing sleeve is rubber. Specifically, the rubber material is softer and more easily deformed by the pressing block, and the sealing effect is better.

[0039] The first sealing ring and the second sealing ring are integrally formed with the flexible sealing sleeve. Specifically, the material of the first sealing ring, the second sealing ring and the flexible sealing sleeve is rubber, and they can be integrally formed during manufacturing. In addition, the two can also be used in the form of clamping and other disassembly and assembly methods, which facilitates the replacement of the first sealing ring and the second sealing ring.

[0040] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art based on the principles and spirit of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A quick-release mechanical sealing device, characterized in that: It includes a mechanical seal body, the outer periphery of which is fixedly provided with a plurality of pipe openings, one end of a screw is threadedly connected to the pipe opening, a flexible sealing sleeve is fixedly sleeved on the outer wall of the screw, and the other end of the screw is fixedly provided with a clamping assembly for pressing the flexible sealing sleeve onto the outer end surface of the mechanical seal body.

2. A quick-release mechanical sealing device according to claim 1, characterized in that: The flexible sealing sleeve includes a sleeve portion tightly matched with the outer wall of the screw and a pressing portion tightly fitted with the outer wall of the mechanical seal.

3. A quick-release mechanical sealing device according to claim 2, characterized in that: The clamping assembly includes a clamping pad and a nut. The clamping pad is sleeved on the outside of the sleeve portion. The clamping pad has a curved end at one end facing the clamping portion. The curvature of the curved end is the same as the curvature of the outer wall of the mechanical seal body. The nut is threadedly connected to the other end of the screw and is pressed on the other end face of the clamping pad.

4. A quick-release mechanical sealing device according to claim 3, characterized in that: A first sealing ring is fixedly provided on the inner wall of the sleeve portion, and the first sealing ring is pressed tightly against the outer wall of the screw.

5. The quick-release mechanical sealing device according to claim 4, characterized in that: The shaft section in the middle of the screw rod that cooperates with the sleeve portion is a smooth section, and both ends of the screw rod are threaded sections.

6. The quick-release mechanical sealing device according to claim 4, characterized in that: A second sealing ring is fixedly provided on a surface of the pressing portion facing the outer wall of the mechanical seal.

7. The quick-release mechanical sealing device according to claim 4, characterized in that: The inner hole end portion of the pressing pad close to one end of the mechanical seal body has an arc-shaped chamfer.

8. The quick-release mechanical sealing device according to claim 1, characterized in that: The flexible sealing sleeve is made of rubber.

9. The quick-release mechanical sealing device according to claim 6, characterized in that: The first sealing ring and the second sealing ring are both integrally formed with the flexible sealing sleeve.

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