Flange gap expansion device

Abstract

The utility model relates to a flange gap expansion device, and belongs to the technical field of pipeline connection equipment. The flange gap expansion device comprises a jackscrew and a jackscrew base, connecting pieces are connected to the two sides of the jackscrew base respectively, connecting pin holes are formed in the connecting pieces, and connecting pins penetrate through the connecting pin holes so that the connecting pieces can be connected to a flange to be expanded. The whole device is fixed to the corresponding flange plate through pin connection, in the movement process that the jackscrew is screwed into the opening flange, along with movement of the flange plate, the connecting piece can move relative to the connecting pin, but due to the fact that the connecting pin is of a pin structure installed in the flange connecting hole of the flange plate in a penetrating mode, even if the connecting piece moves, the connecting pin cannot be separated from the flange plate; and meanwhile, the connecting piece cannot be separated from the connecting pin, so that the problem that the jackscrew falls off in the process of screwing the jackscrew into the opening flange is solved, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to a flange gap expansion device and belongs to the technical field of pipeline connection equipment. Background Art

[0002] In the gathering and transportation pipeline, flange connection is a commonly used pipeline connection method. For example, in the oil pipeline system, the connection between various valves such as butterfly valves, gate valves, check valves and pipelines is flange connection. A seal (such as a sealing ring or a sealing gasket) is set between the flanges. After the two flanges are docked, the two flanges are tightened by bolts to make them tightly combined to achieve the purpose of sealing the fluid medium. During the continuous operation of the system, due to the pressure changes in the system and the corrosion of the process medium, the seals are deformed and failed, which will cause leakage at the flange connection of the pipeline. Therefore, the seals must be replaced in time to avoid leakage of the medium in the pipeline to ensure the normal operation of the system and prevent safety hazards.

[0003] In the prior art, when replacing a seal, a crowbar or a screwdriver is usually used to expand the flange gap. However, the above flange opening method is prone to problems such as the crowbar or screwdriver slipping or breaking, making it difficult to replace the seal, time-consuming and labor-intensive, and causing harm to maintenance personnel. In addition, using a crowbar or a screwdriver to pry open the flange is likely to damage the flange, increasing the risk of pipeline leakage.

[0004] In order to solve the above problems, a Chinese utility model patent with authorization announcement number CN215394738U and authorization announcement date January 4, 2022 discloses a flange opening device, which includes a first positioning arm, a second positioning arm, a push rod, and a support arm. One end of the support arm is rotatably connected to the first positioning arm, and the other end is rotatably connected to the second positioning arm. The push rod is arranged on the support arm and is threadedly matched with the support arm. By screwing the push rod, the top head provided at the front end of the push rod can be moved closer to or away from the flange joint along the radial direction of the flange disk, so that the top end of the push rod can extend into the flange gap to open the flange gap.

[0005] Although the flange opening device disclosed in the above utility model solves the problem of damage to the flange caused by using a crowbar or a screwdriver to pry open the flange, the positioning arms at both ends use a hooking method to connect the flange gap opening device to the flange plate. In the process of pushing the push rod into the flange gap, the positioning arm hooked with the flange plate will move with the movement of the flange plate. As the flange plate opens, the positioning arms at both ends are easy to fall off, and the reliability is poor and it is not easy to operate. Utility Model Content

[0006] The utility model aims to provide a flange gap expansion device to solve the problem of inconvenient operation caused by the easy falling off of the positioning arms at both ends of the existing flange opening device during use.

[0007] In order to achieve the above-mentioned purpose, the flange gap expansion device of the utility model adopts the following technical solutions:

[0008] A flange gap expansion device comprises a top screw and a top screw base, wherein the top screw base is respectively connected with connecting plates on both sides, and the connecting plates are provided with connecting pin holes for connecting pins to pass through so as to connect the connecting plates to the flange to be expanded.

[0009] Beneficial effect: The flange gap expansion device of the utility model improves the existing flange opening device. Connecting plates are respectively connected to both sides of the top screw base, and connecting pin holes are provided on the connecting plates. The connecting pin holes are used for the connecting pins to pass through to connect the connecting plates to the flange to be expanded. The entire device is fixed to the corresponding flange plate by pin connection. During the movement of the top screw to screw into the expanded flange, as the flange plate moves, the connecting plate will move relative to the connecting pin. However, since the connecting pin is a pin structure installed in the flange connecting hole of the flange plate, even if the connecting plate moves, it will not cause the connecting pin to detach from the flange plate, and the connecting plate will not detach from the connecting pin. This solves the problem of the top screw falling off during the process of screwing into the expanded flange, which is safe and reliable.

[0010] Furthermore, the top screw base is an arc-shaped base, and at least two top screws are arranged along the arc-shaped extending direction of the top screw base.

[0011] Furthermore, the connecting plate is provided with more than two base connecting holes for connecting the top screw base, and the connecting pin hole is located between the two base connecting holes in the arc extension direction.

[0012] Furthermore, the connecting pin holes and the base connecting holes are distributed on three vertices of an isosceles triangle, wherein a connecting line of the base connecting holes corresponds to the base of the isosceles triangle.

[0013] Furthermore, the connecting piece is a T-shaped connecting piece, and the connecting pin holes and the base connecting holes are distributed at different ends of the T-shaped connecting piece.

[0014] Furthermore, the outer side surface of the connecting piece is an arc-shaped side surface.

[0015] Furthermore, the connecting piece is connected to the top screw base via a pin shaft, and a gasket is provided between the top screw base and the connecting piece.

[0016] Furthermore, the pin between the connecting piece and the top screw base is a double-headed stud.

[0017] Furthermore, a flange connecting pin for connecting with the flange plate is provided in the connecting pin hole.

[0018] Furthermore, the flange connecting pin is a connecting bolt, and an anti-dropping nut is installed on the connecting bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of a flange gap expansion device in use according to an embodiment of the present invention.

[0020] In the figure: 101, top screw; 102, top screw base; 103, connecting plate; 104, gasket; 11, screw rod; 12, head; 13, insertion part; 105, stud; 106, flange; 107, connecting bolt; 108, flange hole. DETAILED DESCRIPTION

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] The prior art discloses a technical solution of connecting the flange gap expansion device to the flange plate by hooking, but the hooking connection method has the problems of unreliable connection and easy slipping. The utility model proposes an improved solution to the above problems. The core concept of the solution is to pass the corresponding flange connection hole on the flange plate through the connecting pin, and connect the flange gap expansion device to the flange plate through the connecting pin, so as to reliably achieve the connection with the flange plate, and ensure that the flange gap expansion device will not fall off the flange plate during use.

[0023] Based on the above invention concept, Figure 1 As shown, the flange gap expansion device of the present invention includes a top screw 101, a top screw base 102 and a connecting piece 103 connected to both sides of the top screw base 102, and a connecting pin hole is provided on the connecting piece 103, and the connecting pin hole is used for a connecting pin to pass through so as to connect the connecting piece 103 to the flange to be expanded, thereby connecting the entire flange gap expansion device to the flange plate 106.

[0024] Among the above components, the top screw 101 includes a screw rod 11, a head 12 at the tail end of the screw rod, and an insertion portion 13 at the front end of the screw rod. The screw rod 11 is used to cooperate with the top screw hole on the top screw base 102 to convert the rotational motion of the top screw 101 into a soft linear motion, so that the insertion portion 13 is inserted between the two flanges 106 to open them. The head 12 is used to cooperate with corresponding screwing tools, such as wrenches, pliers, etc., to facilitate the screwing of the top screw 101. Figure 1 In the embodiment shown, the head 12 adopts a square structure. However, in order to meet the needs, in some other embodiments, the head 12 can also adopt a structure such as an inner hexagonal hole. Those skilled in the art should understand that the head 12 can adopt any structure that can meet the requirements of screwing with the tool, which will not be described in detail here. Figure 1In the embodiment shown, the inserting portion 13 is in the shape of a conical head and is integrated with the screw rod 11. In other embodiments, the inserting portion 13 may be in a straight line structure and its thickness may be gradually increased from front to back, and the inserting portion 13 and the screw rod 11 may be rotated to cooperate.

[0025] The top screw base 102 is provided with a threaded hole, which is threadedly matched with the top screw 101, and the top screw 101 is inserted between the two flanges 106 with less effort. The top screw base 102 is used as a carrier for the top screw 101 and the connecting piece 103, and only plays a supporting role, so its shape is not particularly limited. Figure 1 In the embodiment shown, the top screw base 102 is preferably an arc-shaped base, which can better fit the end surface of the flange 106 and facilitate the force provided by the top screw to pass through the center of the flange. Figure 1 In the illustrated embodiment, two top screws 11 are provided. In some other embodiments, more than two top screws 11 or only one top screw 11 may be provided according to the size of the flange 106 and the site conditions.

[0026] The connecting piece 103 is provided with a base connecting hole for connecting the top screw base 102. Figure 1 In the embodiment shown, two base connection holes are provided. In some other embodiments, more than two base connection holes may be provided according to the size of the flange 106 and the site conditions, and it is sufficient to ensure that they are located on the same line. The base connection holes are provided with connection pin holes, and the connection pin holes are located between the base connection holes. Figure 1 In the embodiment shown, in order to make the entire device more stable, the connecting pin hole is located on the central axis of the line connecting the two base connecting holes.

[0027] exist Figure 1 In the embodiment shown, the connecting pin hole and the two base connecting holes are distributed on the three vertices of an isosceles triangle, wherein the line connecting the two base connecting holes corresponds to the base of the isosceles triangle. In some other embodiments, the connecting pin hole and the base connecting hole may also be distributed on the vertices of an isosceles trapezoid or other figures that are symmetrical or asymmetrical about the central axis, as long as the base connecting hole is on the lower base and the connecting pin hole is on its central axis or the other end.

[0028] exist Figure 1In the embodiment shown, the shape of the connecting piece 103 is preferably a T-shape, which can save materials and ensure the stability of the entire device. However, in order to meet the needs, in some other embodiments, the shape of the connecting piece 103 can also be selected as an isosceles triangle, an isosceles trapezoid, or other shapes that are symmetrical or asymmetrical about the central axis. The outer side surface of the connecting piece 103 is preferably an arc-shaped side surface, which can better fit the flange 106. In some other embodiments, the outer side surface of the connecting piece 103 can also be selected as a straight-line or other shaped outer side surface, without special limitation.

[0029] The connecting piece 103 is connected to the top screw base 102 through a pin. Figure 1 In the embodiment shown, in order to allow the connecting piece 103 to move up and down on the pin shaft, adapt to flange connections of different thicknesses, and make the connection more stable, the connecting pin shaft is preferably a stud 105. Of course, in some other embodiments, a cylindrical pin connection or welding method can also be adopted. A gasket 104 is arranged between the top screw base 102 and the connecting piece 103. During use, the number of gaskets 104 can be adjusted according to the thickness of the flange to adapt to flange connections of different thicknesses.

[0030] The connecting pin hole and the flange 106 can be connected by a connecting pin. Figure 1 In the embodiment shown, the flange connecting pin is preferably a connecting bolt 107, and an anti-drop nut is installed on the connecting bolt 107. In some embodiments, a connection method corresponding to the flange hole 108 can be selected as needed, such as a stud connection, etc., to ensure that the entire device is fixed on the flange.

[0031] When using the device to prop open the flange, first remove the connecting bolts 107 on the flange 106, select the corresponding number of gaskets 104 according to the thickness of the flange 106, and use the studs 105 to connect the connecting piece 103, gasket 104, and top screw base 102 in sequence through their corresponding holes, symmetrical up and down. Then use the connecting bolts 107 to thread the connecting pin holes on the connecting piece 103 with the corresponding flange holes 108, and install the anti-slip nuts on the connecting bolts 107 to fix them on the flange 108. The device can be used in groups of two, and installed in sequence on the opposite side according to the above steps. After the installation is completed, use a wrench or pliers to screw the top screw heads 11 on both sides, and the insertion part 13 will be inserted between the two flanges 106, so that the flanges 106 can be evenly propped open. In some embodiments, the device can be used in groups of three or more as needed, without specific restrictions.

Claims

1. A flange gap expansion device, comprising a jack screw and a jack screw base, characterized in that: The two sides of the top screw base are respectively connected with connecting plates, and the connecting plates are provided with connecting pin holes, and the connecting pin holes are used for connecting pins to pass through so as to connect the connecting plates to the flange to be expanded.

2. The flange gap expansion device according to claim 1, characterized in that: The top screw base is an arc-shaped base, and at least two top screws are arranged along the arc-shaped extending direction of the top screw base.

3. The flange gap expansion device according to claim 2, characterized in that: The connecting plate is provided with more than two base connecting holes for connecting the top screw base, and the connecting pin hole is located between the two base connecting holes in the arc extension direction.

4. The flange gap expansion device according to claim 3, characterized in that: The connecting pin holes and the base connecting holes are distributed on three vertices of an isosceles triangle, wherein a connecting line of the base connecting holes corresponds to the base of the isosceles triangle.

5. The flange gap expansion device according to claim 3, characterized in that: The connecting piece is a T-shaped connecting piece, and the connecting pin holes and the base connecting holes are distributed at different ends of the T-shaped connecting piece.

6. The flange gap expansion device according to claim 2, characterized in that: The outer side surface of the connecting piece is an arc-shaped side surface.

7. The flange gap expansion device according to any one of claims 1 to 6, characterized in that: The connecting piece is connected to the top screw base through a pin shaft, and a gasket is arranged between the top screw base and the connecting piece.

8. The flange gap expansion device according to claim 7, characterized in that: The pin shaft between the connecting piece and the top screw base is a double-headed stud.

9. The flange gap expansion device according to any one of claims 1 to 6, characterized in that: The connecting pin hole is provided with a flange connecting pin for connecting with the flange plate.

10. The flange gap expansion device according to claim 9, characterized in that: The flange connecting pin is a connecting bolt, and an anti-dropping nut is installed on the connecting bolt.

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