Expander for flange

Abstract

The utility model relates to the technical field of flange expanders, and discloses a flange expander which comprises a connecting plate, a through hole is formed in the outer surface of a fixing plate, a connecting block is arranged on the lower surface of a connecting rod, a connecting assembly is arranged at one end of the connecting block and comprises a shell, and the shell is installed on the outer surface of the connecting block through a bolt. A mounting hole is formed in the outer surface of the shell, and one end of the mounting hole penetrates through the connecting block and extends outwards. By rotating the knob, the one-way screw axially rotates with the mounting hole as the center, the first sliding block axially moves on the one-way screw in the rotating process of the one-way screw, and when the first sliding block moves towards the right side, the first sliding block pushes the extrusion plate to move towards the outer side through the second supporting plate; and the outer surface of the extrusion plate abuts against the inner wall of the flange connecting hole, then the flange effectively supports the connecting plate through the connecting rod and the fixing plate, and the good practical effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of flange expander technology, specifically to an expander for flanges. Background Technology

[0002] A flange expander, also known as a flange clearance expander, is a tool specifically designed to improve the speed of valve gasket replacement, reduce the labor intensity of employees, reduce oil well production losses, and eliminate safety hazards during operation.

[0003] Utility model patent application CN205129754U discloses a flange expander for dismantling, mainly composed of a support frame, a drive structure, and a conical working part. In this design, when dismantling the flange, the pointed end of the conical working part abuts against the flange, and the drive structure drives the conical working part to move radially along the flange. This flange expander solves the problem of worker injury caused by difficulties in dismantling flanges in existing technologies.

[0004] The flange expander disclosed in the aforementioned document has the following defects: the flange expander supports the support frame by inserting a fixing pin into the flange's connection hole. When the diameter of the flange's connection hole is larger than the diameter of the positioning pin, the flange cannot effectively support the support frame after the fixing pin is inserted into the flange's connection hole, resulting in poor performance of the flange expander.

[0005] Therefore, it can be seen that the existing flange expander does not have a good connection structure, and it is necessary to improve the existing shortcomings and provide a flange expander. Utility Model Content

[0006] The purpose of this invention is to provide a flange expander to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model relates to a flange expander, comprising a connecting plate, a driving structure mounted on the lower surface of the connecting plate, a conical working part mounted on the output end of the driving structure, a fixing plate provided on the upper surface of the connecting plate, a through hole provided on the outer surface of the fixing plate, a connecting rod provided inside the through hole, a connecting block provided on the lower surface of the connecting rod, a connecting assembly provided at one end of the connecting block, the connecting assembly comprising a housing, the housing being mounted on the outer surface of the connecting block by bolts, an installation hole provided on the outer surface of the housing, one end of the installation hole penetrating the connecting block and extending outward;

[0009] Furthermore, the mounting hole is internally threaded with a one-way screw, one end of which is provided with a knob, and the outer surface of the one-way screw is threaded with a first slider;

[0010] Furthermore, a first support plate is hinged to the outer surface of the outer shell, and a pressing plate is hinged to the other end of the first support plate;

[0011] Furthermore, a second support plate is hinged to the outer surface of the first slider, and a pressing plate is hinged to the other end of the second support plate;

[0012] In use, first place the expander above the flange, and push the fixing plate to move the outer shell closer to the flange connection hole. When the outer shell is inside the flange connection hole, turn the knob to make the one-way screw rotate axially around the mounting hole. During the rotation of the one-way screw, the first slider moves axially on the one-way screw. When the first slider moves to the right, the first slider pushes the extrusion plate to move outward through the second support plate, so that the outer surface of the extrusion plate abuts against the inner wall of the flange connection hole, thereby making the flange effectively support the connecting plate through the connecting rod and the fixing plate.

[0013] When it is necessary to remove the expander from the flange, the one-way screw is rotated axially around the mounting hole by turning the knob in the opposite direction. During the rotation of the one-way screw, the first slider moves axially on the one-way screw. When the first slider moves to the left, it pulls the extrusion plate inward through the second support plate, so that the outer surface of the extrusion plate is no longer in contact with the inner surface of the flange connection hole. Then, the fixing plate is pulled outward, so that the outer shell gradually separates from the inside of the flange connection hole. After the outer shell is completely separated from the flange connection hole, the expander can be removed from the flange.

[0014] Furthermore, the outer surface of the extrusion plate is provided with anti-slip stripes;

[0015] The anti-slip stripes on the outer surface of the extrusion plate can increase the friction between the extrusion plate and the inner wall of the flange connection hole.

[0016] Furthermore, the upper surface of the connecting plate is provided with a sliding groove, the inside of the sliding groove is provided with a guide rod, and the lower surface of the fixing plate is provided with a second slider, which is slidably connected to the outer surface of the guide rod.

[0017] This utility model has the following beneficial effects:

[0018] (1) By rotating the knob, the one-way screw rotates axially around the mounting hole. During the rotation of the one-way screw, the first slider moves axially on the one-way screw. When the first slider moves to the right, the first slider pushes the extrusion plate to move outward through the second support plate, so that the outer surface of the extrusion plate abuts against the inner wall of the flange connection hole. Thus, the flange effectively supports the connection plate through the connecting rod and the fixing plate, achieving a good practical effect.

[0019] (2) The present invention can limit the second slider in the groove by setting the guide rod, so as to prevent the second slider from falling out of the groove during use, thus achieving a better limiting effect.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the connecting component structure of this utility model. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the connecting component structure of this utility model. Figure 2 ;

[0026] The attached diagram lists the components represented by each number as follows:

[0027] In the figure: 1. Connecting plate; 101. Slide groove; 2. Drive structure; 3. Conical working part; 4. Fixing plate; 401. Second slider; 5. Connecting rod; 6. Connecting block; 7. Connecting assembly; 701. Housing; 702. One-way screw; 703. Knob; 704. First slider; 705. First support plate; 706. Extrusion plate; 707. Second support plate; 708. Anti-slip stripe; 8. Guide rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1 - Figure 4 As shown, this utility model is a flange expander, including a connecting plate 1, a driving structure 2 installed on the lower surface of the connecting plate 1, a conical working part 3 installed at the output end of the driving structure 2, a fixing plate 4 provided on the upper surface of the connecting plate 1, a through hole opened on the outer surface of the fixing plate 4, a connecting rod 5 provided inside the through hole, a connecting block 6 provided on the lower surface of the connecting rod 5, a connecting component 7 provided at one end of the connecting block 6, the connecting component 7 including a housing 701, the housing 701 being installed on the outer surface of the connecting block 6 by bolts, an installation hole opened on the outer surface of the housing 701, one end of the installation hole penetrating the connecting block 6 and extending outward;

[0030] The upper surface of the connecting plate 1 is provided with a sliding groove 101, and the inside of the sliding groove 101 is provided with a guide rod 8. The lower surface of the fixing plate 4 is provided with a second slider 401, and the second slider 401 is slidably connected to the outer surface of the guide rod 8.

[0031] The guide rod 8 can limit the second slider 401 in the slide groove 101, preventing the second slider 401 from disengaging from the slide groove 101 during use, thus achieving a good limiting effect.

[0032] The mounting hole is internally threaded with a one-way screw 702. One end of the one-way screw 702 is provided with a knob 703. The outer surface of the one-way screw 702 is threaded with a first slider 704.

[0033] A first support plate 705 is hinged to the outer surface of the outer shell 701, and a pressing plate 706 is hinged to the other end of the first support plate 705.

[0034] The outer surface of the first slider 704 is hinged to the second support plate 707, and the other end of the second support plate 707 is hinged to the extrusion plate 706.

[0035] In use, the expander is first placed above the flange. By pushing the fixing plate 4, the outer shell 701 moves towards the end closer to the flange connection hole. When the outer shell 701 is inside the flange connection hole, the one-way screw 702 rotates axially around the mounting hole by turning the knob 703. During the rotation of the one-way screw 702, the first slider 704 moves axially on the one-way screw 702. When the first slider 704 moves to the right, the first slider 704 pushes the extrusion plate 706 outward through the second support plate 707, so that the outer surface of the extrusion plate 706 abuts against the inner wall of the flange connection hole, thereby enabling the flange to effectively support the connecting plate 1 through the connecting rod 5 and the fixing plate 4.

[0036] When it is necessary to remove the expander from the flange, the one-way screw 702 is rotated axially around the mounting hole by turning the knob 703 in the opposite direction. During the rotation of the one-way screw 702, the first slider 704 moves axially on the one-way screw 702. When the first slider 704 moves to the left, the first slider 704 pulls the extrusion plate 706 inward through the second support plate 707, so that the outer surface of the extrusion plate 706 is no longer in contact with the inner surface of the flange connection hole. Then, the fixing plate 4 is pulled outward, so that the outer shell 701 gradually separates from the inside of the flange connection hole. After the outer shell 701 is completely separated from the flange connection hole, the expander can be removed from the flange.

[0037] The outer surface of the extruded plate 706 is provided with anti-slip stripes 708;

[0038] The anti-slip stripes 708 provided on the outer surface of the extrusion plate 706 can increase the friction between the extrusion plate 706 and the inner wall of the flange connection hole.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A flange expander, comprising a connecting plate (1), a driving structure (2) mounted on the lower surface of the connecting plate (1), a conical working part (3) mounted on the output end of the driving structure (2), a fixing plate (4) provided on the upper surface of the connecting plate (1), a through hole provided on the outer surface of the fixing plate (4), and a connecting rod (5) provided inside the through hole, characterized in that: The lower surface of the connecting rod (5) is provided with a connecting block (6), and one end of the connecting block (6) is provided with a connecting component (7); The connecting assembly (7) includes a housing (701), which is bolted to the outer surface of the connecting block (6). The outer surface of the housing (701) has a mounting hole, one end of which passes through the connecting block (6) and extends outward.

2. The flange expander according to claim 1, characterized in that: The mounting hole is internally threaded with a one-way screw (702), one end of which is provided with a knob (703), and the outer surface of the one-way screw (702) is threaded with a first slider (704).

3. The flange expander according to claim 1, characterized in that: The outer surface of the outer shell (701) is hinged to a first support plate (705), and the other end of the first support plate (705) is hinged to a pressing plate (706).

4. A flange expander according to claim 2, characterized in that: The outer surface of the first slider (704) is hinged to a second support plate (707), and the other end of the second support plate (707) is hinged to a pressing plate (706).

5. A flange expander according to claim 3, characterized in that: The outer surface of the extrusion plate (706) is provided with anti-slip stripes (708).

6. A flange expander according to claim 1, characterized in that: The upper surface of the connecting plate (1) is provided with a sliding groove (101), and a guide rod (8) is provided inside the sliding groove (101). The lower surface of the fixing plate (4) is provided with a second slider (401), and the second slider (401) is slidably connected to the outer surface of the guide rod (8).

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