Hydraulic expansion sleeve convenient to prepare and position

Abstract

The utility model relates to the field of hydraulic expansion sleeves, in particular to a hydraulic expansion sleeve convenient to prepare and position, which comprises an expansion sleeve main body, and the flanges are arranged outside the expansion sleeve body and used for positioning, clamping blocks are fixedly installed on the rear portions of the flanges, limiting columns are fixedly installed on the rear portions of the flanges, and threaded grooves are formed in the inner surfaces of the expansion sleeve body. According to the hydraulic expansion sleeve convenient to prepare for positioning, through the arrangement of the expansion sleeve body, the flange, the clamping blocks, the limiting columns, the threaded grooves and the bolts, rapid installation and accurate positioning of the expansion sleeve body can be improved, and the clamping blocks behind the flange are inserted into the installation position for positioning; meanwhile, the limiting column behind the flange is also inserted into the position limiting groove where the flange is installed, finally, the flange and the expansion sleeve body are installed through a plurality of bolts, the multiple limiting modes and threaded connection are utilized, the installation preparation positioning performance of the expansion sleeve body is improved, and therefore the bearing pressure impact is improved, and meanwhile the torsional strength is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic expansion sleeves, in particular to a hydraulic expansion sleeve which is convenient for preparing and positioning. Background Art

[0002] Hydraulic expansion sleeves, also known as hydraulic tightening sleeves or hydraulic expansion sleeves, are a special mechanical part that is filled with hydraulic oil and pressure is added through a hydraulic pump to achieve a tightening effect. They are mainly used to connect pipes, equipment, flow meters, etc. to prevent leakage and loosening.

[0003] The existing hydraulic expansion sleeves cannot be installed quickly and accurately during the installation preparation process, which can easily cause the hydraulic expansion sleeves to loosen during the installation process. This not only delays the work progress, but also lacks stability, and also affects the expansion sleeves' ability to withstand pressure impact, resulting in poor torsional strength.

[0004] Therefore, it is necessary to invent a hydraulic expansion sleeve that is easy to prepare and position to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic expansion sleeve that is easy to prepare for positioning. The block behind the flange is inserted into the installed position for positioning, and at the same time, the limit column behind the flange is also inserted into the installed position limit groove. Finally, the flange and the expansion sleeve body are installed using multiple bolts, and multiple limit methods and threaded connections are used to improve the installation preparation positioning of the expansion sleeve body. This not only improves the impact of pressure, but also improves the torsional strength, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic expansion sleeve convenient for preparing positioning, comprising an expansion sleeve main body;

[0007] A flange is arranged outside the expansion sleeve body and is used for positioning. A clamping block is fixedly installed behind the flange. A limiting column is fixedly installed behind the flange. A threaded groove is provided on the inner surface of the expansion sleeve body. Bolts are arranged inside the threaded groove.

[0008] The oil inlet is arranged above the flange and is used for conveying hydraulic oil. An oil cavity is arranged inside the expansion sleeve body, and an inner sleeve is arranged inside the expansion sleeve body.

[0009] Preferably, the clamping block is arranged in a circular shape, and the limiting columns are arranged in four groups behind the flange.

[0010] Preferably, the oil inlet is movably connected to an outer cover inside, and the outer cover is threadedly connected to the oil inlet.

[0011] Preferably, anti-skid grooves are provided inside the inner sleeve, and the anti-skid grooves are distributed at equal intervals inside the inner sleeve.

[0012] Preferably, an exhaust hole is opened inside the lower part of the flange, an exhaust pipe is arranged inside the exhaust hole, an external thread is opened on the outside of the exhaust pipe, and a sealing cover is connected to the external thread of the exhaust pipe.

[0013] Preferably, the oil inlet is communicated with the oil chamber, and the oil chamber is communicated with the exhaust hole.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] Through the arrangement of the expansion sleeve body, flange, clamping block, limiting column, thread groove and bolts, the expansion sleeve body can be quickly installed and accurately positioned. The clamping block behind the flange is inserted into the installation position for positioning, and at the same time, the limiting column behind the flange is also inserted into the installation position limiting groove. Finally, the flange and the expansion sleeve body are installed by multiple bolts. Multiple limiting methods and threaded connection are used to improve the installation positioning of the expansion sleeve body, which not only improves the impact of pressure, but also improves the torsional strength.

[0016] Through the arrangement of the expansion sleeve body, the oil inlet, the outer cover, the oil chamber, the inner sleeve and the anti-skid groove, the oil inlet is connected to the oil pump pipeline, and the oil pump is used to transport hydraulic oil into the oil chamber inside the expansion sleeve body, so that the inner sleeve expands uniformly under the action of the hydraulic pressure, thereby firmly holding the shaft, and the anti-skid groove inside the inner sleeve strengthens the friction between the inner sleeve and the shaft, thereby improving the firmness between them. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the clamping block and the limiting column of the utility model;

[0020] Figure 3 This is a schematic diagram of the outer cover structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the oil chamber structure of the utility model;

[0022] Figure 5This is a schematic diagram of the exhaust pipe structure of the utility model.

[0023] Description of reference numerals:

[0024] 1. Expansion sleeve body; 2. Flange; 3. Block; 4. Limiting column; 5. Threaded groove; 6. Bolt; 7. Oil inlet; 8. Outer cover; 9. Oil chamber; 10. Inner sleeve; 11. Anti-skid groove; 12. Exhaust hole; 13. Exhaust pipe; 14. External thread; 15. Sealing cover. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-5 A hydraulic expansion sleeve for easy preparation and positioning shown includes an expansion sleeve body 1;

[0027] The flange 2 is arranged outside the expansion sleeve body 1 for positioning. A clamping block 3 is fixedly installed behind the flange 2. A limiting column 4 is fixedly installed behind the flange 2. A threaded groove 5 is provided on the inner surface of the expansion sleeve body 1. Bolts 6 are arranged inside the threaded groove 5.

[0028] An oil inlet 7 is provided above the flange 2 for conveying hydraulic oil. An oil chamber 9 is provided inside the expansion sleeve body 1. An inner sleeve 10 is provided inside the expansion sleeve body 1. The clamping block 3 behind the flange 2 is inserted into the installed position for positioning. At the same time, the limiting column 4 behind the flange 2 is also inserted into the limiting groove of the installed position. Finally, the flange 2 and the expansion sleeve body 1 are installed by multiple bolts 6. Multiple limiting methods and threaded connections are used to improve the installation preparation positioning of the expansion sleeve body 1, which not only improves the impact of pressure, but also improves the torsional strength.

[0029] like Figure 2 As shown, the clamping block 3 is circular, and the limiting columns 4 are arranged in four groups behind the flange 2. By using the arrangement of the clamping block 3 and the limiting columns 4, the expansion sleeve body 1 and the flange 2 can be positioned and installed, thereby improving the bearing capacity.

[0030] like Figure 1 , Figure 3 and Figure 4 As shown, the oil inlet 7 is movably connected to an outer cover 8, which is threadedly connected to the oil inlet 7. The outer cover 8 can be used to seal the oil inlet 7 to prevent dust from entering the interior when hydraulic oil is not injected.

[0031] like Figure 4As shown, the inner sleeve 10 is provided with anti-skid grooves 11, which are evenly spaced inside the inner sleeve 10. When the inner sleeve 10 hugs the shaft, the anti-skid grooves 11 are close to the shaft to enhance the friction between them and improve the overall clamping degree.

[0032] like Figure 4 and Figure 5 As shown, an exhaust hole 12 is opened inside the lower part of the flange 2, an exhaust pipe 13 is arranged inside the exhaust hole 12, an external thread 14 is opened outside the exhaust pipe 13, and a sealing cover 15 is connected to the external thread of the exhaust pipe 13. The setting of the exhaust hole 12 and the exhaust pipe 13 can extract the internal air, and the sealing cover 15 can prevent the air from entering the oil chamber 9.

[0033] like Figure 4 As shown, the oil inlet 7 is connected to the oil chamber 9, and the oil chamber 9 is connected to the exhaust hole 12. When injecting hydraulic oil, in order to avoid air inside the expansion sleeve body 1, the internal air is extracted from the exhaust hole 12 by a vacuum pump to avoid affecting the subsequent injection of hydraulic oil.

[0034] The practical working principle of the present invention is as follows: first, install the expansion sleeve body 1 and the flange 2 at the required positions, first put the expansion sleeve body 1 on the outside of the shaft, then align the flange 2 with the installation position, insert the clamping block 3 behind the flange 2 into the installation position for positioning, and at the same time, the limiting column 4 behind the flange 2 is also inserted into the limiting groove of the installation position, and finally use multiple bolts 6 to install the flange 2 and the expansion sleeve body 1, and use multiple limiting methods and threaded connections to improve the installation preparation positioning of the expansion sleeve body 1, which not only improves the impact of pressure, but also improves the torsional strength. Next, To unscrew the sealing cover 15 under the exhaust pipe 13, connect the vacuum pump to the exhaust pipe 13, and then use the vacuum pump to extract the air inside the oil chamber 9. After the air is extracted, tighten the sealing cover 15 to the outside of the exhaust pipe 13, then unscrew the outer cover 8 in the oil inlet 7, and then thread the oil pump and the oil inlet 7 together. When the connection is completed, inject hydraulic oil. The hydraulic oil enters the oil chamber 9 through the oil inlet 7 and expands evenly under the action of the hydraulic pressure, so that the inner sleeve 10 and the anti-skid groove 11 hold the shaft tightly. In this way, the use process of the hydraulic expansion sleeve that is easy to prepare for positioning is completed.

[0035] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hydraulic expansion sleeve that is easy to prepare for positioning, characterized in that: It comprises an expansion sleeve body (1); A flange (2) is arranged outside the expansion sleeve body (1) and is used for positioning. A clamping block (3) is fixedly installed behind the flange (2). A limiting column (4) is fixedly installed behind the flange (2). A threaded groove (5) is provided on the inner surface of the expansion sleeve body (1). Bolts (6) are provided inside the threaded groove (5). An oil inlet (7) is provided above the flange (2) and is used for conveying hydraulic oil. An oil chamber (9) is provided inside the expansion sleeve body (1), and an inner sleeve (10) is provided inside the expansion sleeve body (1).

2. A hydraulic expansion sleeve for easy preparation and positioning according to claim 1, characterized in that: The clamping block (3) is arranged in a circular shape, and the limiting columns (4) are arranged in four groups behind the flange (2).

3. A hydraulic expansion sleeve for easy preparation and positioning according to claim 1, characterized in that: The oil inlet (7) is movably connected to an outer cover (8) inside, and the outer cover (8) is threadedly connected to the oil inlet (7).

4. A hydraulic expansion sleeve for easy preparation and positioning according to claim 1, characterized in that: The inner sleeve (10) is provided with anti-skid grooves (11) inside, and the anti-skid grooves (11) are distributed at equal intervals inside the inner sleeve (10).

5. A hydraulic expansion sleeve for easy preparation and positioning according to claim 1, characterized in that: An exhaust hole (12) is provided inside the lower part of the flange (2), an exhaust pipe (13) is provided inside the exhaust hole (12), an external thread (14) is provided outside the exhaust pipe (13), and a sealing cover (15) is connected to the external thread of the exhaust pipe (13).

6. A hydraulic expansion sleeve for easy preparation and positioning according to claim 1, characterized in that: The oil inlet (7) is in communication with the oil chamber (9), and the oil chamber (9) is in communication with the exhaust hole (12).

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