Improved metal corrugated pipe mechanical sealing device

Abstract

The utility model discloses an improved metal corrugated pipe mechanical sealing device, which relates to the technical field of metal corrugated pipe sealing, and comprises a corrugated pipe main body, and one end of the corrugated pipe main body is fixedly connected with an installation connecting mechanism; the installation connecting mechanism comprises a communicating pipe, the communicating pipe is communicated to one end of the corrugated pipe, the inner wall of the communicating pipe is fixedly sleeved with a sealing pipe, the tail end of the sealing pipe is communicated with a sealing rubber ring, and the outer wall of the communicating pipe is in threaded connection with a threaded sleeve. According to the utility model, the shaft end of the equipment penetrates into the communicating pipe, and then the sealing rubber ring is sleeved on the outer wall of the equipment by rotating the threaded sleeve, so that the installation connecting mechanism and the equipment are fixed and sealed together, the installation process can be quicker and more convenient, the installation efficiency is improved, and the service life of the equipment is prolonged. And in the dismounting process, dismounting can be carried out more quickly, so that maintenance is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of metal bellows sealing, in particular to an improved metal bellows mechanical sealing device. Background Art

[0002] At present, in the fields of oil production, storage, transportation, gathering and transportation, packing seals are generally used for the shaft end seals of various rotating equipment. Due to the shortcomings of short sealing life, frequent replacement, large shaft stringing, and high labor intensity of operators, conventional mechanical seals have been gradually replaced. As oil field exploitation reaches the middle and late stages, affected by factors such as the high impurities in the conveyed medium, easy scaling, severe corrosion, and increased conveying pressure, conventional mechanical sealing devices have the disadvantages of increased leakage, parts wear, and short service life. In particular, at present, great importance is attached to the safety of the production site, the surrounding environment and the operator, and the working operation must be safe and reliable. The existing sealing devices can no longer meet the requirements of normal production conditions.

[0003] The existing patent (Announcement No.: CN212004257U) discloses a metal bellows mechanical seal device, comprising a sleeve, the outer portion of the sleeve is fixed with a dynamic ring tail seat by a screw C, the right end of the dynamic ring tail seat is welded with a metal bellows, the right end of the metal bellows is welded with a dynamic ring seat (6), the right end of the dynamic ring seat is inlaid with a dynamic ring, the right end of the dynamic ring is in contact with the plane of the static ring, and the static ring is placed inside the gland. The metal bellows mechanical seal device has greater elasticity, strength and rigidity, good floating and random compensation, can compensate for leakage caused by sealing ring wear, axial movement, vibration and the like, and has a long service life.

[0004] However, the above technical solution still has certain defects. During the installation process, the above technical solution still needs to be installed by bolts, which requires repeated rotation of the bolts during the installation process, which consumes a lot of time during the installation and leads to low installation efficiency. For this reason, an improved metal bellows mechanical sealing device is proposed. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide an improved metal bellows mechanical sealing device to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an improved metal bellows mechanical sealing device, comprising a bellows body, one end of which is fixedly connected to a mounting connection mechanism;

[0007] The installation and connection mechanism includes a connecting pipe, which is connected to one end of the corrugated pipe. The inner wall fixed sleeve of the connecting pipe is provided with a sealing pipe, the end of the sealing pipe is connected to a sealing rubber ring, the outer wall of the connecting pipe is threadedly connected to the threaded sleeve, the inner wall of the threaded sleeve is fixedly connected to a pushing pipe extending into the interior of the connecting pipe, and the pushing pipe extends between the sealing pipe and the connecting pipe.

[0008] As a preferred technical solution of the improved metal bellows mechanical sealing device of the present invention, the inner wall of the sealing rubber ring is provided with multiple groups of protrusions.

[0009] As a preferred technical solution of the improved metal bellows mechanical sealing device of the utility model, the other end of the bellows is connected to a fixed sealing mechanism, which includes two groups of fixed sleeves, and a group of first half rings are slidably provided on the outer wall of each group of fixed sleeves.

[0010] As a preferred technical solution of the improved metal bellows mechanical sealing device of the utility model, the inner wall of each group of the fixed sleeves is respectively provided with a group of semi-annular sealing strips, and the contact positions of the two groups of semi-annular sealing strips are provided with grooves and protrusions.

[0011] As a preferred technical solution of the improved metal bellows mechanical sealing device of the present invention, the inner wall of each group of the fixed sleeves is respectively provided with a group of second half rings, and the two groups of the second half rings are threadedly connected to the inner walls of the two groups of fixed sleeves.

[0012] As the preferred technical solution of the improved metal bellows mechanical sealing device of the present invention, the first semi-ring includes a semi-ring body, which is sleeved on the outer wall of the fixed sleeve, one end of the semi-ring body is fixedly connected to a protrusion, and the other end of the semi-ring body is provided with a groove.

[0013] As a preferred technical solution of the improved metal bellows mechanical sealing device of the present invention, the inner wall of the first half ring is provided with a thread that matches the outer wall of the fixed sleeve.

[0014] In summary, the present invention has the following beneficial effects:

[0015] 1. The utility model inserts the shaft end of the device into the connecting pipe, and then rotates the threaded sleeve to make the sealing rubber ring fit on the outer wall of the device, so that the installation connection mechanism and the device are fixed and sealed together, which makes the installation process faster and more convenient, thereby improving the installation efficiency, and can be disassembled more quickly during the disassembly process, making maintenance more convenient;

[0016] 2. The utility model fits two sets of fixing sleeves together and then locks the fixing sleeves through the first half ring, so that the semi-annular sealing strip fits together with the workpiece to achieve a sealing effect, and the bellows body and the fixing sleeve are fixed together through the second half ring, making it more convenient to replace the semi-circular sealing ring strip when it is needed, thereby improving the efficiency of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the fixed sealing mechanism of the present utility model;

[0019] Figure 3 This is a schematic diagram of the explosion structure of the fixed sealing mechanism of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the installation and connection mechanism of the present utility model;

[0021] Figure 5 This is a schematic diagram of the main structure of the first half ring of the present invention.

[0022] In the figure: 1. Bellows body; 2. Installation and connection mechanism; 3. Fixed sealing mechanism;

[0023] 201, connecting pipe; 202, sealing pipe; 203, sealing rubber ring; 204, threaded sleeve; 205, pushing pipe;

[0024] 301, fixing sleeve; 302, first half ring; 3021, half ring body; 3022, protrusion; 3023, groove; 303, semi-annular sealing strip; 304, second half ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] The following describes an embodiment of the present invention based on its overall structure.

[0027] Improved metal bellows mechanical seal device, such as Figures 1 to 5 As shown, it includes a bellows body 1, one end of which is fixedly connected to a mounting connection mechanism 2;

[0028] The installation connection mechanism 2 includes a connecting pipe 201, which is connected to one end of the corrugated pipe. The inner wall fixed sleeve 301 of the connecting pipe 201 is provided with a sealing pipe 202, and the end of the sealing pipe 202 is connected to a sealing rubber ring 203. The outer wall of the connecting pipe 201 is threadedly connected to the threaded sleeve 204, and the inner wall of the threaded sleeve 204 is fixedly connected to a pushing pipe 205 extending to the inside of the connecting pipe 201. The pushing pipe 205 extends between the sealing pipe 202 and the connecting pipe 201, and the inner wall of the sealing rubber ring 203 is provided with multiple groups of protrusions.

[0029] By inserting the shaft end of the equipment into the connecting pipe 201 and then rotating the threaded sleeve 204, the threaded sleeve 204 pushes the pushing tube 205 into the connecting pipe 201, so that the pushing tube 205 pushes the sealing rubber ring 203, so that the sealing rubber ring 203 moves closer to the middle, so that the sealing rubber ring 203 fits the equipment, so that the bellows body 1 and the equipment maintain a sealed connection, avoiding frequent and multiple tightening of bolts during the installation process.

[0030] Please refer to Figure 2 、 Figure 3 and Figure 5 The other end of the bellows is connected to a fixed sealing mechanism 3, which includes two groups of fixed sleeves 301. The outer wall of each group of fixed sleeves 301 is slidably provided with a group of first half rings 302, and the inner wall of each group of fixed sleeves 301 is respectively provided with a group of semi-annular sealing strips 303. The contact positions of the two groups of semi-annular sealing strips 303 are provided with grooves 3023 and protrusions. The inner wall of each group of fixed sleeves 301 is respectively provided with a group of second half rings 304. The two groups of second half rings 304 are threadedly connected to the inner walls of the two groups of fixed sleeves 301. The first half ring 302 includes a semi-ring body 3021, which is sleeved on the outer wall of the fixed sleeve 301. One end of the semi-ring body 3021 is fixedly connected with a protrusion 3022. The other end of the semi-ring body 3021 is provided with a groove 3023. The inner wall of the first half ring 302 is provided with a thread that matches the outer wall of the fixed sleeve 301.

[0031] The two sets of fixing sleeves 301 are placed on the outer wall of the shaft end so that the two sets of fixing sleeves 301 fit together, so that the two sets of semicircular sealing strips are sleeved on the outer wall of the shaft end. Then, the two sets of semi-ring bodies 3021 are placed on the outer wall of the fixing sleeve 301, and the protrusions 3022 and grooves 3023 on the two sets of semi-ring bodies 3021 are pushed to interact and connect with each other, so that the two sets of semi-ring bodies 3021 are sleeved on the outer wall of the fixing sleeve 301. Then, the two sets of semi-ring bodies 3021 are threadedly connected to the outer walls of the two sets of fixing sleeves 301 through threads, so that the two sets of fixing sleeves 301 cannot be separated. Then, the ends of the bellows are abutted against the ends of the two sets of fixing sleeves 301. Then, the two sets of second semi-rings 304 are sleeved on the outer wall of the bellows body 1, and then the two sets of second semi-rings 304 are screwed into the ends of the two sets of fixing sleeves 301, so that the two sets of second semi-rings 304 connect the bellows and the fixing sleeve 301 together.

[0032] When in use, the shaft end of the device is inserted into the connecting pipe 201, and then the sealing rubber ring 203 is sleeved on the outer wall of the device by rotating the threaded sleeve 204, so that the installation connection mechanism 2 and the device are fixed and sealed together, so that the installation process can be faster and more convenient, and the installation efficiency is improved. In addition, the disassembly process can be carried out more quickly, making maintenance more convenient. The parts not involved in the device are the same as the existing technology or can be implemented using the existing technology.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An improved metal bellows mechanical seal device, comprising a bellows body (1), characterized in that: One end of the bellows body (1) is fixedly connected to a mounting connection mechanism (2); The installation connection mechanism (2) comprises a connecting pipe (201), the connecting pipe (201) is connected to one end of the corrugated pipe, the inner wall fixed sleeve (301) of the connecting pipe (201) is provided with a sealing pipe (202), the end of the sealing pipe (202) is connected to a sealing rubber ring (203), the outer wall of the connecting pipe (201) is threadedly connected to the threaded sleeve (204), the inner wall of the threaded sleeve (204) is fixedly connected to a pushing pipe (205) extending into the interior of the connecting pipe (201), and the pushing pipe (205) extends between the sealing pipe (202) and the connecting pipe (201).

2. The improved metal bellows mechanical seal device according to claim 1, characterized in that: The inner wall of the sealing rubber ring (203) is provided with multiple groups of protrusions.

3. The improved metal bellows mechanical seal device according to claim 1, characterized in that: The other end of the bellows is connected to a fixed sealing mechanism (3), which comprises two groups of fixed sleeves (301), and a group of first half rings (302) are slidably provided on the outer wall of each group of fixed sleeves (301).

4. The improved metal bellows mechanical seal device according to claim 3, characterized in that: The inner wall of each set of the fixing sleeves (301) is respectively provided with a set of semi-annular sealing strips (303), and the contact positions of the two sets of the semi-annular sealing strips (303) are provided with grooves (3023) and protrusions.

5. The improved metal bellows mechanical seal device according to claim 3, characterized in that: The inner wall of each set of the fixing sleeves (301) is respectively sleeved with a set of second half rings (304), and the two sets of the second half rings (304) and the inner walls of the two sets of the fixing sleeves (301) are threadedly connected.

6. The improved metal bellows mechanical seal device according to claim 3, characterized in that: The first semi-ring (302) includes a semi-ring body (3021), which is sleeved on the outer wall of the fixed sleeve (301), one end of the semi-ring body (3021) is fixedly connected to a protrusion (3022), and the other end of the semi-ring body (3021) is provided with a groove (3023).

7. The improved metal bellows mechanical seal device according to claim 3, characterized in that: The inner wall of the first half ring (302) is provided with a thread that matches the outer wall of the fixing sleeve (301).

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