Open flange pressing apparatus

Abstract

The application discloses an open flange pressing equipment, which comprises split housings, two split housings are sealed and attached on two sides of a flange of a pipeline to be detected, and a gas pipe interface is arranged on one of the split housings. The application has novel structure and high practicability. The flange surface of the pipeline can be detected from the outside, and the difficulty that the pipeline end cannot be detected due to the difficulty in plugging the pipeline end is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water power overhauling, in particular to an open flange pressing equipment. BACKGROUND

[0002] In the process of overhauling a hydroelectric generator, flanges need to be checked for leaks. After installation of the pressure water pipe and pressure oil pipe flanges of a hydroelectric generator unit, if the pipe is too long or is buried in the wall or ground, it may not be possible to seal both ends and pressurize for leak detection. If leaks are found after starting up, it is necessary to drain oil and water, which is very troublesome and will affect power generation of the unit.

[0003] Currently, open flange leak detection is mainly performed during equipment commissioning, which has the following problems:

[0004] 1. The flange installation quality cannot be determined in time because there is a long time between completion of replacement of the pipe flange seal and commissioning.

[0005] 2. The processing time is long and the unit overhauling period is extended because the problem is detected during commissioning of the unit. SUMMARY

[0006] The present application aims to provide an open flange pressing equipment to solve the technical problems in the background art.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] An open flange pressing equipment comprises split housings, two of which are sealed and attached to both sides of the flange of a pipe to be tested, and one of the split housings is provided with a gas pipe interface.

[0009] In some embodiments, the axial end face of the split housing is provided with a magnetic fluid sealing groove, which comprises an end magnetic fluid sealing groove and a side wall magnetic fluid sealing groove arranged in communication, the side wall magnetic fluid sealing grooves on both sides are mutually engaged to form a first magnetic fluid groove when the two split housings are sealed and attached to both sides of the flange of the pipe to be tested, the end magnetic fluid sealing grooves on both sides are mutually attached to the pipe to form a second magnetic fluid groove, the first magnetic fluid groove and the second magnetic fluid groove are in communication, the outside of the split housing is provided with a magnetic fluid injection port in communication with the magnetic fluid sealing groove, and the magnetic poles of the permanent magnets on the inner and outer sides of the first magnetic fluid groove and the second magnetic fluid groove are opposite, the magnetic fluid is injected through the magnetic fluid injection port, and the magnetic fluid forms a magnetic fluid sealing strip under the action of the permanent magnets to realize sealing between the two split housings and between the two split housings and the pipe.

[0010] In some embodiments, the split shell is provided with bolt holes for locking on both sides.

[0011] In some embodiments, the split shell is provided with fixing top screw holes on both sides.

[0012] Compared with the prior art, the present application has the beneficial effects of:

[0013] The present application has novel structure and strong practicability.

[0014] (1) The flange surface of the pipeline installation can be detected from the outside, solving the difficulty of pipeline end plugging and detection;

[0015] (2) A new type of magnetic fluid seal is used as a gas-tight means, which can adapt to pipeline diameter change, rough outer wall of pipeline and other difficulties;

[0016] (3) The top screw is used to fix the outer wall of the pipeline to fix the pressing tool shell, which is stable and the detection result is stable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a schematic diagram of the open flange pressing equipment of the present embodiment;

[0018] Fig. 2 is a schematic diagram of the split shell of the present embodiment;

[0019] Fig. 3 is a schematic diagram of the magnetic fluid injection port of the present embodiment; DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings of the preferred embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] The embodiments of the present application will be described in detail below in combination with the drawings.

[0022] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] In the description of the application, it is necessary to understand that the terms "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the application.

[0024] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or display including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0025] The following will be combined with Figs. 1-3 A kind of open flange pressurizing equipment related to the embodiment of the application will be described in detail.It is worth noting that the following embodiments are only used to explain the application and do not constitute a limitation on the application.

[0026] Embodiment 1:

[0027] Referring to Figs. 1-3 As shown in the figure, an open flange pressurizing device includes: split shell 5, the material of split shell can be photosensitive resin, light weight, using non-metal 3D printing one-time forming, non-conductive, wear-resistant and heat-resistant. Two split shell seals are attached on both sides of the flange 4 of the pipeline to be measured;The two sides of the split shell are provided with bolt holes 3 for locking, which are fastened by bolts in the bolt holes. In order to further ensure that the whole formed by the two split shells does not move on the pipeline during pressurizing, the two sides of the split shell are provided with fixed jackscrew holes 1. Positioning jackscrew bolts are installed in the fixed jackscrew holes for fixing the split shell.

[0028] One of the split shells is provided with an air pipe interface 2, which can be adapted to an air pipe joint for convenient pressurizing at any time.

[0029] The axial end surface of the split shell is provided with a magnetic fluid sealing groove 7, which comprises an end magnetic fluid sealing groove and a side wall magnetic fluid sealing groove arranged in communication, when the two split shells are sealingly attached on both sides of the flange of the pipeline to be detected, the side wall magnetic fluid sealing grooves on both sides are buckled to form a first section of magnetic fluid groove, and the end magnetic fluid sealing grooves on both sides are attached to the pipeline to form a second section of magnetic fluid groove, the first section of magnetic fluid groove and the second section of magnetic fluid groove are in communication, the outer side of the split shell is provided with a magnetic fluid injection port 8 in communication with the magnetic fluid sealing groove, and the inner and outer sides of the first section of magnetic fluid groove and the second section of magnetic fluid groove are respectively provided with permanent magnets 6 with opposite magnetic poles, by injecting magnetic fluid into the magnetic fluid injection port, the magnetic fluid forms a magnetic fluid sealing strip under the action of the permanent magnet to realize the sealing between the two split shells and between the two split shells and the pipeline. It should be noted that the permanent magnets here do not need to be arranged continuously, but only need to be segmented by gluing a few blocks.

[0030] The magnetic fluid is the main sealing material of the pressing tool, and the magnetic fluid itself is a colloidal liquid, which has good self-adaptive characteristics on the variable-diameter and uneven surface, can ensure that the pressing tool and the outer side of the pipeline with any surface condition form a stable closed cavity, and ensure the reliability of the pressing experiment conclusion.

[0031] During conventional maintenance, the split shell is wrapped outside the detection pipeline flange section and locked on the outer wall of the pipeline through bolts; the top screw bolt is installed, the pipeline is used to support the pressing tool shell, which is convenient and fast, and convenient for disassembly; the gas pipe interface is connected with the gas pipeline. Through the magnetic fluid injection hole, the magnetic fluid is injected to ensure that the magnetic fluid is tightly attached to the pipeline to be detected, and the magnetic fluid injection hole is blocked after being attached. The cavity formed by the two split shells is pressed to the required pressure retaining value, the maximum pressure resistance of the tool magnetic fluid is 0.6MPa, which is enough to adapt to most pressure retaining pressure requirements; pressure retaining observation, the pressure gauge value on the pressing pipeline does not change, and it is confirmed that the pipeline flange sealing performance is good.

[0032] After the pressing work is completed, the split shell is removed, the magnetic fluid can be taken out or left in the magnetic fluid sealing groove, and the magnetic fluid can be used continuously next time.

[0033] The above only describes the preferred embodiments of the present application, and is used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An open flange pressing device, characterized in that: include: Split-type housing, two of which are sealed and attached to both sides of the flange of the pipeline to be tested; one of the split-type housings is provided with an air pipe interface; A magnetic fluid sealing groove is provided on the axial end face of the split-flap shell, and the magnetic fluid sealing groove includes an end magnetic fluid sealing groove and a side wall magnetic fluid sealing groove that are connected to each other. When the two split-flap shells are sealed and fitted on both sides of the flange of the pipeline to be measured, the side wall magnetic fluid sealing grooves on both sides are buckled together to form a first section of the magnetic fluid groove, and the end magnetic fluid sealing grooves on both sides are fitted with the pipeline to form a second section of the magnetic fluid groove. The first section of the magnetic fluid groove and the second section of the magnetic fluid groove are connected to each other. A magnetic fluid injection port connected to the magnetic fluid sealing groove is provided on the outside of the split-flap shell, and permanent magnets with opposite magnetic poles are respectively provided on the inner and outer sides of the first section of the magnetic fluid groove and the second section of the magnetic fluid groove. By injecting magnetic fluid into the magnetic fluid injection port, the magnetic fluid forms a magnetic fluid sealing strip under the action of the permanent magnet to achieve sealing between the two split-flap shells and between the two split-flap shells and the pipeline; Bolt holes for locking are provided on both sides of the split-petal shell.

2. The open flange pressing device according to claim 1, characterized in that: Both sides of the split-petal shell are provided with fixing top screw holes.

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