Embedded flange

Abstract

The utility model relates to the technical field of flanges, in particular to an embedded flange which comprises a flange plate and a connecting pipe which are arranged in a split mode, the connecting pipe comprises a large-diameter section and a small-diameter section, a step face is arranged between the large-diameter section and the small-diameter section, and the flange plate is provided with an inner hole for the connecting pipe to penetrate through. A stop face used for being in stop fit with the step face in the axial direction is correspondingly arranged in an inner hole of the flange plate, and the end face of one axial side of the flange plate is a fixing face used for being fixed to the end face to be connected. The end face of the other axial side, opposite to the fixing face, of the flange plate is provided with a mounting hole penetrating to the stop face. The embedded flange further comprises an abutting piece used for being installed in the mounting hole to abut against the step face of the connecting pipe after the flange plate and the connecting pipe are installed. By means of the structure, when the embedded flange is installed, the connecting pipe and the flange plate can be installed respectively, time-consuming and labor-consuming installation caused by weight accumulation of the connecting pipe and the flange plate and the situation that the circumferential relative positions of the connecting pipe and the flange plate need to be adjusted are avoided, installation efficiency is improved, and work intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to an embedded flange. Background Art

[0002] During on-site production in oil fields, it is necessary to frequently perform tests, fishing, and pressure measurement on the flange at the outlet of the test gate at the wellhead of the water injection well, which causes serious wear and corrosion of the internal threads of the flange. If it continues to be used, there will be safety hazards. In order to avoid the occurrence of safety accidents, the current common solution in oil fields is to increase the daily maintenance of related flanges and replace damaged flanges. However, due to the influence of factors such as the on-site construction environment and operating conditions, the increased maintenance does not improve the service life of the flange much, and the service life of the replaced flange is also very short, resulting in a huge waste of material and labor costs.

[0003] The existing Chinese utility model patent with authorization announcement number CN217401115U discloses a split-type fracturing pump discharge flange, including a flange, a joint (i.e., a connecting pipe) and a positioning pin. One end of the joint is a connection port, and the other end of the joint is provided with an outer ring platform, and the outer wall of the outer ring platform is provided with a fixing pin hole B. The inner wall of the flange is provided with an inner ring platform, the inner ring platform matches the outer ring platform, and the inner ring platform and the end surface (i.e., the stop surface and the step surface) of the outer ring platform are stop-connected, and the positioning pin is installed in the positioning pin hole formed by the fixing pin hole A and the fixing pin hole B, so as to avoid the relative rotation of the flange and the joint. The utility model sets the discharge flange as a split structure as a whole, that is, the discharge flange is set as a flange part and a joint part. When a part is damaged, only the corresponding damaged part needs to be replaced, and there is no need to replace the entire discharge flange, thereby reducing costs and avoiding waste. The utility model also provides a positioning pin to prevent the joint and the flange from rotating relative to each other, so as to avoid the joint from rotating relative to the flange in actual work. However, the locating pin in the utility model is arranged between the inner ring of the flange and the outer ring of the joint. When the flange is actually installed and used, the fixing pin hole A and the fixing pin hole B must be aligned and the locating pin must be installed before the flange is installed as a whole to the end face to be connected of the fracturing pump exhaust flange. For heavier flanges and joints, it is difficult to align the fixing pin hole A on the flange with the fixing pin hole B on the joint. On the other hand, the overall weight of the flange and joint connected as one is heavier, so it is time-consuming and laborious to assemble with the end face to be connected of the fracturing pump exhaust flange, which is very inconvenient. Utility Model Content

[0004] The utility model aims to provide an embedded flange for solving the problem that the existing split flange has a positioning pin arranged on the axial mating surface of the flange and the connecting pipe, which results in the flange and the connecting pipe needing to be aligned with each other before the embedded flange is installed to install the positioning pin, thus making the overall installation of the embedded flange more troublesome.

[0005] The embedded flange of the utility model adopts the following technical solutions:

[0006] An embedded flange comprises a flange plate and a connecting pipe which are separately arranged. The connecting pipe comprises a large diameter section and a small diameter section. A step surface is arranged between the large diameter section and the small diameter section. The flange plate has an inner hole for the connecting pipe to pass through. A stop surface for cooperating with the step surface along the axial stop is correspondingly arranged in the inner hole of the flange plate. An axial end surface of the flange plate is a fixing surface for fixing to an end surface to be connected. An installation hole penetrating to the stop surface is arranged on the axial end surface of the flange plate which is opposite to the fixing surface. The embedded flange also comprises a tightening member which is inserted into the installation hole after the flange plate and the connecting pipe are installed to tighten the step surface of the connecting pipe.

[0007] Beneficial effect: The embedded flange of the utility model is an improvement on the prior art. The improvement lies in that a mounting hole penetrating to the stop surface is provided on the axial end surface of the flange plate which is opposite to the fixed surface. The embedded flange also includes a pressing piece which is installed in the mounting hole to press against the step surface of the connecting pipe after the flange plate and the connecting pipe are installed. In this way, the connecting pipe can be installed first, and then the flange plate is installed and the stop surface in the inner hole of the flange plate cooperates with the step surface to press against the connecting pipe. After the connecting pipe and the flange plate are installed, the pressing piece is installed in the mounting hole and presses against the step surface of the connecting pipe to prevent the connecting pipe from rotating. The utility model can separately install the connecting pipe and the flange plate, and there is no need to assemble the connecting pipe and the flange plate as a whole before installing them, thereby avoiding the time-consuming and laborious installation caused by the weight accumulation of the connecting pipe and the flange plate, improving the installation efficiency and reducing the work intensity. And the pressing piece can press against the step surface of the connecting pipe as long as it is installed in the mounting hole, and there is no need to adjust the circumferential relative position of the connecting pipe and the flange plate, which is convenient to operate.

[0008] Furthermore, the mounting hole is a threaded hole, and the tightening member is a tightening screw.

[0009] Furthermore, the tightening screw is a countersunk screw, and the depth of the mounting hole satisfies that the end face of the tightening screw does not protrude from the end face of the flange when tightening the step surface.

[0010] Furthermore, the step surface is an annular conical surface.

[0011] Furthermore, at least two of the tightening members are provided, and at least two mounting holes are also provided and correspond one to one with the tightening members.

[0012] Furthermore, the tightening members are evenly arranged on the same circumference of the flange.

[0013] Furthermore, the inner hole of the connecting pipe is a threaded hole, and the end of the inner hole of the connecting pipe is threadedly connected with a plug.

[0014] Furthermore, a stop hole for cooperating with a screwing tool is provided on the end surface of the plug.

[0015] Furthermore, the connecting pipe comprises a mating surface for mating with the end surface to be connected, and a mounting groove for mounting a sealing member is provided on the mating surface.

[0016] Furthermore, the sealing member is a steel sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the embedded flange of the utility model;

[0018] Figure 2 for Figure 1 Top view of the middle flange after the tightening parts are installed;

[0019] Figure 3 for Figure 1 The front view of the middle flange after the tightening parts are installed;

[0020] Figure 4 for Figure 1 The front view of the middle connecting pipe;

[0021] Figure 5 for Figure 1 A top view of the middle connecting pipe;

[0022] Figure 6 for Figure 1 The front view of the middle plug;

[0023] Figure 7 for Figure 1 A top view of the middle plug;

[0024] Figure 8 for Figure 1 A front view of the middle top fastener;

[0025] Fig. 9 for Figure 1 A top view of the middle fastening member;

[0026] In the figure: 1. flange; 11. stop surface; 12. fixing surface; 2. bolt hole; 3. connecting pipe; 31. large diameter section; 32. small diameter section; 33. step surface; 34. matching surface; 35. mounting groove; 4. plug; 41. recessed hole; 5. countersunk screw. DETAILED DESCRIPTION

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] First, the technical solution of the utility model is generally described as follows:

[0029] Based on the above problems, an embedded flange is conceived, including a flange plate and a connecting pipe which are separately arranged. The connecting pipe includes a large diameter section and a small diameter section, and a step surface is provided between the large diameter section and the small diameter section. The flange plate has an inner hole for the connecting pipe to pass through, and a stop surface for cooperating with the step surface along the axial stop is correspondingly provided in the inner hole of the flange plate. The end surface of one axial side of the flange plate is a fixing surface for fixing to the end surface to be connected, and a mounting hole penetrating to the stop surface is provided on the end surface of the flange plate on the axial side opposite to the fixing surface. The embedded flange also includes a tightening member for being installed in the mounting hole to tighten the step surface of the connecting pipe after the flange plate and the connecting pipe are installed. In this way, the connecting pipe can be installed first, and then the flange plate is installed, and the stop surface in the inner hole of the flange plate cooperates with the step surface to press the connecting pipe. After the connecting pipe and the flange plate are installed, the tightening member is installed in the mounting hole and tightens the step surface of the connecting pipe to prevent the connecting pipe from rotating. The utility model can install the connecting pipe and the flange separately, without assembling the connecting pipe and the flange as a whole before installation, thereby avoiding the time-consuming and laborious installation caused by the weight accumulation of the connecting pipe and the flange, improving the installation efficiency and reducing the work intensity. Moreover, the tightening member can tighten the step surface of the connecting pipe as long as it is installed in the installation hole, and there is no need to adjust the circumferential relative position of the connecting pipe and the flange, so the operation is relatively convenient.

[0030] Based on the above concept, the specific embodiment of the embedded flange of the utility model is as follows:

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the embedded flange includes a flange 1 and a connecting pipe 3. The connecting pipe 3 includes a large diameter section 31, a small diameter section 32, and a step surface 33 between the large diameter section 31 and the small diameter section 32. The flange 1 has an inner hole for the connecting pipe 3 to pass through, and a stop surface 11 for cooperating with the step surface 33 is correspondingly provided in the inner hole. The end surface of one axial side of the flange 1 is a fixing surface 12 for fixing to the end surface to be connected, and the end surface of the other axial side of the flange 1 facing away from the fixing surface 12 is provided with a mounting hole penetrating the stop surface. The embedded flange also includes a tightening member for being installed in the mounting hole to tighten the step surface 33 of the connecting pipe 3 after the flange 1 and the connecting pipe 3 are installed to the end surface to be connected, so that the connecting pipe can be installed first, and then the flange can be installed and the stop surface in the inner hole of the flange can cooperate with the step surface to press the connecting pipe. Specifically, the flange 1 is provided with a bolt hole 2, and the flange 1 is installed to the desired position by passing the bolt through the bolt hole 2. After the connection pipe and the flange are installed, the tightening piece is installed in the installation hole and tightens the step surface of the connection pipe to prevent the connection pipe from rotating. This embodiment can install the connection pipe and the flange separately, without assembling the connection pipe and the flange as a whole before installation, thereby avoiding the time-consuming and laborious installation caused by the weight accumulation of the connection pipe and the flange, improving the installation efficiency and reducing the work intensity. Moreover, as long as the tightening piece is installed in the installation hole, the step surface of the connection pipe can be tightened, and there is no need to adjust the circumferential relative position of the connection pipe and the flange, which is convenient to operate.

[0032] The mounting hole on the flange 1 is a threaded hole, and the jacking piece is a jacking screw. In this embodiment, the jacking screw is specifically a countersunk screw 5, and the depth of the threaded hole is sufficient to prevent the countersunk screw 5 from protruding from the end surface of the flange 1 after pressing the step surface 33 of the connecting pipe 3, thereby avoiding the countersunk screw 5 protruding from the end surface of the flange 1 and interfering with other structures. The connection of the jacking piece is set as a threaded connection for easy processing, and the countersunk screw 5 is easy to purchase and has a low cost.

[0033] In order to increase the pressure of the countersunk screws 5 on the connecting pipe 3 after the embedded flange is installed and further prevent the connecting pipe 3 from rotating, at least two countersunk screws 3 are provided, and at least two mounting holes are also provided accordingly. In this embodiment, two countersunk screws 5 are provided to tighten the connecting pipe 3, and two mounting holes are provided on the corresponding upper page of the flange 1. Furthermore, the countersunk screws 5 are evenly arranged on the same circumference of the flange 1, so that the pressure received by the connecting pipe 3 is more uniform.

[0034] The step surface 33 of the connecting pipe 3 is specifically an annular conical surface, and the corresponding stop surface 11 on the flange 1 is also an annular conical surface. When the connector 3 is inserted into the inner hole of the flange 1 for installation, the step surface 33 of the annular conical surface and the stop surface have a certain guiding effect, which facilitates the installation between the flange 1 and the connecting pipe 3.

[0035] like Figure 1 , Figure 4 , Figure 6 , Figure 7 As shown, the inner hole of the connecting pipe 3 is a threaded hole, and the end of the inner hole of the connecting pipe is threadedly connected with a plug 4. In actual production, the connecting pipe 3 can be connected to a tool or other tool for pressure measurement, casting and fishing through the internally arranged threaded connection. In a non-working state where pressure measurement and casting and fishing are not required, the plug 4 is screwed into the connecting pipe 3. On the one hand, it can prevent the thread of the connecting pipe 3 from being damaged, and on the other hand, it can also prevent foreign matter from entering the connecting pipe 3. Furthermore, a stop hole for cooperating with a screwing tool is provided on the end face of the plug, specifically a concave hole 41 recessed into the inside of the plug 4. On the one hand, the concave concave hole 41 can save materials and reduce the processing cost of the plug 4. On the other hand, the concave concave hole 41 also avoids protruding to the outside of the connecting pipe 3 to cause interference with other components.

[0036] In order to ensure the connection seal between the embedded flange and the part to be installed, the connecting pipe 3 also includes a mating surface 34 for mating with the end face to be connected, the mating surface 34 is aligned with the fixed surface 12, and the mating surface 34 is provided with a mounting groove 35 for installing the seal. The mounting groove 35 is arranged on the mating surface 34, and only one sealing structure is required to ensure the sealing match between the end face to be connected and the mating surface 34, thereby reducing the manufacturing cost. The seal is specifically a steel sealing ring (not shown in the figure) arranged in the mounting groove 35. On the one hand, the steel sealing ring can be used for sealing under high-pressure working conditions. On the other hand, the cooperation between the steel sealing ring and the sealing groove 35 facilitates the matching installation of the connecting pipe 3 and the end face to be connected, and has a certain guiding effect.

[0037] in accordance with Figure 1 , Figure 3 , Figure 4 , Figure 8 , Fig. 9 The use of the embedded flange is explained, taking the gate outlet flange as an example. The embedded flange includes a flange 1, a connecting pipe 3, a plug 4, a countersunk screw 5 and a steel sealing ring (not shown in the figure). Before installation, the steel sealing ring is first placed in the corresponding installation groove of the end face to be connected of the gate outlet flange, and the installation groove 35 of the connecting pipe 3 is aligned with the corresponding installation groove of the end face to be connected by the guidance of the steel sealing ring. Then, the flange 1 is sleeved through the small diameter section 32 of the connecting pipe 3, and the stop surface 11 is stopped by the step surface 33 of the connecting pipe 3. Bolts are used to pass through the bolt holes 2 to fix the flange 1 and the connecting pipe 3 to the gate outlet flange, and then the countersunk screw 5 is screwed into the flange 1 and tightened against the step surface 33 of the connecting pipe 3 to prevent the connecting pipe 3 from rotating along its own axis. Finally, the plug 4 is screwed into the connecting pipe 3 from the small diameter section 31 to prevent foreign matter from entering the connecting pipe 3 or the thread from being damaged.

[0038] In other embodiments, a rubber sealing ring may be used as the sealing member instead of a steel sealing ring.

[0039] In other embodiments, the sealing structure may no longer be a sealing groove provided on the mating surface of the connecting pipe, but a sealing gasket may be directly clamped between the connecting pipe and the end surface to be connected as a seal.

[0040] In other embodiments, the plug end surface may no longer be provided with a stop hole for cooperating with a screwing tool, but may be provided with a protrusion for cooperating with a screwing tool. In other embodiments, the plug has a screwing portion that exposes the threaded hole of the connector, and the plug is disassembled and assembled through the screwing portion.

[0041] In other embodiments, the connecting pipe may also be provided with an external thread for connecting the testing instrument on the outer peripheral surface of the small diameter section. In this case, the plug is connected to the connecting section via the external thread of the small diameter section.

[0042] In other embodiments, it is also possible to no longer connect the threaded connection plug in the pipe, and directly use a tarpaulin or other materials including a connection head to prevent foreign matter from entering or damaging the thread.

[0043] In other embodiments, the pressing members may no longer be evenly arranged, and may no longer be arranged on the same circumference, as long as the pressing members can press against the step surface of the connecting pipe after being installed on the flange.

[0044] In other embodiments, the number of the pressing members may be three or four and may be evenly arranged on the same circumferential surface of the flange. In other embodiments, the number of the pressing members may be only one.

[0045] In other embodiments, the step surface of the connecting pipe and the stop surface of the flange may also be matching planes.

[0046] In other embodiments, the pressing member may also be a hexagonal bolt, and the bolt head of the hexagonal bolt is exposed outside the mounting hole.

[0047] In other embodiments, the mounting hole may also be a plain hole, in which case the tightening member is a pin that is interference-fitted into the plain hole.

[0048] In other embodiments, the fixing surface of the flange and the matching surface of the connecting pipe may not be arranged on the same plane, and the two may be matched and installed on different planes respectively.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. An embedded flange, comprising a flange plate and a connecting pipe which are separately arranged, wherein the connecting pipe comprises a large diameter section and a small diameter section, a step surface is arranged between the large diameter section and the small diameter section, the flange plate has an inner hole for the connecting pipe to pass through, a stop surface for cooperating with the step surface along the axial stop is arranged in the inner hole of the flange plate, and an axial end surface of the flange plate is a fixing surface for fixing to the end surface to be connected, characterized in that: A mounting hole penetrating to the stop surface is arranged on the axial end surface of the flange plate which faces away from the fixing surface. The embedded flange also includes a tightening member which is inserted into the mounting hole to tighten the step surface of the connecting pipe after the flange plate and the connecting pipe are installed.

2. The embedded flange according to claim 1, characterized in that: The mounting hole is a threaded hole, and the tightening member is a tightening screw.

3. The embedded flange according to claim 2, characterized in that: The tightening screw is a countersunk screw, and the depth of the mounting hole is such that the end face of the tightening screw does not protrude from the end face of the flange when the tightening screw tightens the step surface.

4. The embedded flange according to any one of claims 1 to 3, characterized in that: The step surface is an annular conical surface.

5. The embedded flange according to any one of claims 1 to 3, characterized in that: There are at least two pressing members, and there are at least two mounting holes corresponding to the pressing members one by one.

6. The embedded flange according to claim 5, characterized in that: The tightening parts are evenly arranged on the same circumference of the flange.

7. The embedded flange according to any one of claims 1 to 3, characterized in that: The inner hole of the connecting pipe is a threaded hole, and the end of the inner hole of the connecting pipe is threadedly connected with a plug.

8. The embedded flange according to claim 7, characterized in that: The end surface of the plug is provided with a rotation-stopping hole for cooperating with a screwing tool.

9. The embedded flange according to any one of claims 1 to 3, characterized in that: The connecting pipe comprises a matching surface for matching with the end surface to be connected, and a mounting groove for mounting a sealing member is arranged on the matching surface.

10. The embedded flange according to claim 9, characterized in that: The sealing element is a steel sealing ring.

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