RU144442U1 - DEVICE FOR CHANGE OF LATCHES UNDER PRESSURE - Google Patents

Abstract

A device for changing gate valves under pressure, comprising parallel-mounted sliding frames, an associated pipe attachment unit, characterized in that the sliding frames are connected by hydraulic cylinders; between them, on the axis of the rotary sector, on each side of the replaced valve, a rotary sector is mounted having a half ring that is detachably connected to another half ring covering the flange of the replaced valve; on the other half ring of the rotary sector, equipped with a temporary insert with a detachable half ring, there is a flange for installing a new valve; the rotary sector is equipped with a hydraulic cylinder, and from the side opposite the valve, it is equipped with a stop, which is made in the form of a figured part with a hole in the center, detachable along the axis of the hole, along the connector line having protrusions on both sides; the protrusions are interconnected by fasteners; the lower part of the stop is made in the form of a semicircle around the perimeter, the upper part is made by the angle around the perimeter, at the top of which a hole is made for attaching the stop to the axis of the rotary sector; lateral vertical parts of the sliding frame have protrusions with holes in which protrusions of the stop are inserted; the central stop hole, through which the connector line passes, has circumferentially located recesses under the protruding fasteners; from the outside, the rotary sector is equipped with a cleaning knife.

Description

The utility model relates to water supply, in particular to devices for repairing pipes under pressure, and can be used to replace failed shutoff valves (valves) without shutting off pressure in the main (or distributing) network, as well as to install the main valve on a steel pipe without disconnecting the pressure in the main (or distributing) network.

The known technology of Ravetti (replacement of the valve in Milan) (http://www.youtube.com/watch?v=QEv810S_uLY), which consists in the fact that in the section of the water supply with a faulty valve 1 (Fig. 8) at points "A ”And“ B ”mounting holes are made, a temporary tap is connected (a pipe extending at 90 degrees) and a loopback device, i.e. water begins to bypass the valve, while the presence of a temporary bypass water supply makes it possible to change the valve. Disadvantages: from open sources, it is not known the device by which the movement of water through the valve is blocked. In addition, the technology and device for attaching a temporary water supply to a cast-iron (polyethylene) pipe are unknown, as well as the technology and device for plugging a temporary water supply after installing a valve, the technology requires considerable time to replace an inoperative valve.

Known technical solution according to patent RU 2201547 C2 F16K 43/00, publ. 03/27/2003, the DEVICE FOR CHANGE OF LATCHES UNDER PRESSURE which contains the parallel and detachable and one-piece support traverses with axial openings. An assembly to the reinforcement is connected to the traverses with guide screws. A hollow rod is installed in the central axial hole of the split beam. The composite drive shaft of the hollow stem is located in the hollow stem and the central axial bore of the integral traverse. A packer is attached to the hollow stem on the thread. The device also includes a mechanism for sealing the hollow stem relative to the valve body. This mechanism includes a housing with flanges, a sealing element, a packing follower and a pressure threaded cover. A support nut is installed on the split traverse. Additionally, the device is equipped with a sealing coil. The coil includes a housing with a flange, a sealing element and a thrust ring nut. The attachment unit of the device to the valve is made in the form of a split plate and is equipped with two split clamps. The split plate is mounted on the pipe. Detachable clamps are rigidly fixed to the pipe with toothed crackers. Disadvantage: the complexity of the design, welding is used, which sharply violates safety standards, in addition, to use the well-known design for its intended purpose, it is necessary to dismantle the reverse side of the pipe, which is not applicable to the conduit of utility networks.

The technical task of creating a device for changing gate valves under pressure: replacing a standing shut-off valve (gate valve) without shutting off pressure in the main (or distributing) water supply network.

Currently, in order to change a failed valve, it is necessary to disconnect the whole microdistrict from the water supply for at least 8 hours, which creates great inconvenience for users of communal networks. Moreover, directly replacing the valve takes much less time than the time spent on the preparatory work: draining water, pumping water from wells, etc., or installing a bypass water supply.

The inventive device allows you to change the valve directly in the well, without the device of temporary water supply and without turning off the water supply. The essence of the proposed innovation is as follows: the replaceable valve has connecting flanges, which are bolted to the mating flanges of the main pipe. With the help of clamps, a device is installed to replace the valve to the main pipe in the area close to the place of attachment of the replaced valve. The device provides the force with which it is necessary to compress the pipe to dismantle the fastening elements, i.e. completely untwist and release the bolt from the bolts, while the tightness of the water supply is not broken, because the device forces the flanges of the main pipe to each other.

The essence of the device for replacing the valve is that a temporary technological insert, repeating the exact size of the valve, is fixed on a special seat. An “P” force is applied to the insert, tending to push the valve to the side, but because the valve is clamped, the insert stays at rest. The hydraulic actuator needs to unclench and squeeze the flanges of the main pipe, when the flanges of the main pipe are unclenched, the pressure “P” of the seat where the temporary insert is fixed becomes larger and the valve is “pushed” to the side and a temporary insert is placed instead, the main pipe flanges again are compressed on the flanges of the temporary insert. Then, instead of the valve being replaced, a new valve is mounted on the seat of the split half-ring and, in the reverse order of movement, the new valve is replaced by the valve being replaced. Between the temporary insertion of the detachable half ring and the valve to be replaced, a special cleaning knife is fixed to remove the old gasket. The new gasket is firmly fixed to the new valve in advance (for example, glued). After the new valve locks into place, it is fixed with bolts and the device is removed from the well.

To implement the specified procedure for changing the valve, a device is proposed for changing the valve under pressure, the design of which includes two sliding frames, the lower ends of each are connected by hydraulic cylinders, providing expansion of the flanges of the main pipe; between them on the axis of the rotary sector, on each side of the valve being replaced, a rotary sector is mounted having a half ring that can be detachably connected to another half ring covering the flange of the valve being replaced. On the other half ring of the rotary sector, equipped with a detachable half ring (temporary insert) there is a flange to which a new valve is mounted. The rotary sector is equipped with a hydraulic cylinder providing shear force of the replaceable valve. The rotary sector from the outside (from the side opposite the valve) is equipped with a special stop, which is made in the form of a figured part with a hole in the center, detachable along the axis of the hole, along the connector line with protrusions on both sides; the protrusions are fastened together by fasteners, such as bolts; the lower part of the special stop is made in the form of a semicircle around the perimeter, the upper part is made by the angle around the perimeter, at the top of which a hole is made for attaching the stop to the axis of the rotary sector. Special emphasis is placed on the flanges of the main pipe. The lateral vertical parts of the sliding frame have rectangular protrusions with an opening into which protrusions of a special stop are inserted. The central hole of the special stop through which the connector line passes has circumferentially located recesses for protruding fasteners. On the outside, the rotary sector is equipped with a cleaning knife for cleaning the flange of the main pipe when shifting the rotary sector.

The inventive utility model includes at least two devices described above, each of which is mounted on two different sides of the valve simultaneously: two rotary sectors, each of which has a split half ring, a temporary insert that matches the parameters of the flanges of the valve to be replaced, to each rotary a special emphasis is attached to the sector by an axis, connected to the sliding frame by protrusions, a stripping knife is located in the center of each rotary sector between the half rings of the flanges. Each sliding frame is connected by a hydraulic cylinder, also the body of each rotary sector is equipped with a hydraulic cylinder, while each rotary sector is symmetrical with respect to the valve being replaced.

The advantages of using the inventive device:

1. Possibility of installation in a well. According to regulatory documents, from the top of the steering wheel rod 9 of the valve to the top of the floor slab should be at least 0.3-0.5 m. Water wells have a depth of at least 1.5 m. This space is enough to place the valve and the temporary insert side by side. (There may not be enough space for the second valve).

2. Reducing the time for troubleshooting: installation of the installation on the pipe will take 2-3 hours - replacing the valve no more than an hour.

3. The valve is replaced without shutting off the pressure in the pipe.

4. Resource-saving - quick elimination of an emergency in the water main of utility networks increases the saving of water resources.

The technical result of the claimed utility model is to reduce the time it takes to change the valve and troubleshoot without shutting off the pressure in the water supply network.

The technical result is achieved due to the design of the device for changing the valve under pressure, which contains parallel sliding frames, an associated pipe mount, characterized in that the sliding frames are connected by hydraulic cylinders; between them, on the axis of the rotary sector, on each side of the replaced valve, a rotary sector is mounted having a half ring that is detachably connected to another half ring covering the flange of the replaced valve; on the other half ring of the rotary sector, equipped with a temporary insert with a detachable half ring, there is a flange for installing a new valve; the rotary sector is equipped with a hydraulic cylinder, and from the side opposite the valve, it is equipped with a stop, which is made in the form of a figured part with a hole in the center, detachable along the axis of the hole, along the connector line having protrusions on both sides; the protrusions are interconnected by fasteners; the lower part of the stop is made in the form of a semicircle around the perimeter, the upper part is made by the angle around the perimeter, at the top of which a hole is made for attaching the stop to the axis of the rotary sector; lateral vertical parts of the sliding frame have protrusions with holes in which protrusions of the stop are inserted; the central stop hole, through which the connector line passes, has circumferentially located recesses under the protruding fasteners; from the outside, the rotary sector is equipped with a cleaning knife.

The essence of the technical solution is explained by the images in figures 1-9, where

Figure 1 - device for replacing valves under pressure;

Figure 2 is a view of a device for replacing gate valves under pressure in section AA;

Figure 3 - view of the stop assembly (front view and side view)

Figure 4 is a sectional view of the stop in BB;

Figure 5 is a sectional view of an emphasis BB;

6 is a view of the stop assembly in isometry;

Fig.7 - rotary sector for installing the valve on the pipe "out of the blue" (without replacing the valve);

Fig - trunk pipe with a valve before installing a device for replacing valves;

Fig.9. - view of the pipe and the installation location of the device for replacing valves, where

1 - inoperative valve (to be replaced)

2 - part of the main pipe;

3 - part of the main pipe;

4 - flange of the main pipe;

5 - flange of the main pipe;

6 - flange of the replaced valve;

7 - flange of a replaceable valve;

8 - place of attachment to the rotary sector

9 - steering wheel of a replaceable valve;

10 - place of attachment of stops;

11 - temporary insertion of a detachable half ring;

12 - hydraulic cylinder of the rotary sector;

13 - hydraulic cylinder sliding frame;

14 - emphasis;

15 - stripping knife;

16 - place of insertion;

17 - pipe section between the flanges;

18 - welding seam,

19 - the smallest notch distance (from the flange side)

20 - rotary sector;

21 - sliding frame.

22 - axis of the rotary sector

23 - a detachable half ring of a rotary sector;

24 - the estimated dimensions of the well in which the valve is replaced.

An example implementation. A device for changing gate valves under pressure, comprises parallel-mounted sliding frames 21, an associated pipe mount; sliding frames 21 are connected by hydraulic cylinders 13, providing expansion of the flanges 4 and 5 of the main pipe; between them, on the axis of the rotary sector 22, on each side of the replaceable (non-working) valve 1, a rotary sector 20 is mounted having a half ring 23, detachably connected to another half ring covering the flange of the replaceable valve (6 or 7); on the other half ring of the rotary sector, equipped with a split half ring 11 (temporary insert), there is a flange for installing a new valve; the rotary sector 20 is equipped with a hydraulic cylinder 12, providing a shear force of the replaceable valve; the rotary sector 20 from the side opposite the valve is equipped with a stop 14, which is made in the form of a figured part with a hole in the center, detachable along the axis of the hole, along the connector line having protrusions on both sides; the protrusions are interconnected by fasteners; the lower part of the stop is made in the form of a semicircle around the perimeter, the upper part is made by the angle around the perimeter, at the top of which a hole is made for attaching the stop 14 to the axis of the rotary sector 22; lateral vertical parts of the sliding frame 21 have protrusions with openings into which protrusions of the stop 14 are inserted; the central stop hole, through which the connector line passes, has circumferentially located recesses under the protruding fasteners; from the outside, the rotary sector is equipped with a cleaning knife 15; the device is installed symmetrically on each of the two sides of the valve: two rotary sectors, each of which has a detachable half ring, a temporary insert that matches the parameters of the flanges of the valve to be replaced, an emphasis is attached to each rotary sector with protrusions connected to the sliding frame in the center of each rotary sector 14 between the half rings of the flanges is a stripping knife; each sliding frame is connected by a hydraulic cylinder 13, also the housing of each rotary sector 14 is equipped with a hydraulic cylinder 12, while each rotary sector 14 is located symmetrically on each side of the valve being replaced 1.

An example of the use of a device for changing valves under pressure. The valve 1 has connecting flanges 6 and 7, which are bolted to the counterflanges of the main pipe 4 and 5. Using clamps, we fasten the device for replacing pressure valves to the main pipe in zone 10. The force with which the pipe must be compressed so that the bolts can be was removed, i.e. fully untwist and release the bolt from the bolts, provide hydraulic cylinders 13, while the tightness of the water supply is not broken, because the device forces the flanges 4 and 5 together. The principle of replacing the valve is that a temporary technological insert 11, repeating the exact size of the valve 1, is fixed on a special seat of the rotary sector 20, the force "P" is applied to the insert, trying to push the valve to the side, but since the valve is clamped, so the insert remains at rest. Hydraulic drive 13 to unclench and squeeze the flanges 4 and 5 is enough 1-2 seconds. When the flanges 4 and 5 are opened, the pressure force “P” of the seat where the temporary insert 11 is fixed becomes larger and the valve is “pushed” to the side and temporary insert 11 rises instead, the flanges 4 and 5 are compressed again. Instead of a faulty valve, a new one is mounted and in the reverse order, a new valve is put in place of the faulty one. Between the insert 11 and the valve 1, a stripping knife 15 is fixed to remove the old gasket. The new gasket to the new valve must be firmly fixed in advance, for example, glued or fixed in another way. After the new valve falls into place, it remains to fix it with bolts and dismantle the device to replace the valves from the well.

Advantages of the claimed design: the design allows installation in a well in which, according to SNiP, the distance from the top of the helm rod 9 valves to the top of the floor slab is at least 0.3-0.5 m. The dimensions of the water wells are at least 1.5 m in depth. This space is enough to place a valve and a temporary insert next to it (in case there is not enough space for the second valve).

Application example (1). On a non-working valve 1 install a device for changing valves. The non-working valve is firmly fixed in the rotary sector 20. For the possibility of mounting on the valve, the sector 20 has a detachable half ring 23. Using the cylinder 13, through special stops 14, we tighten the two flanges of the main pipe 4 and 5 to each other. The compression force of the flanges 4 and 5 will make it possible to keep the water supply tight without fixing bolts connecting the valve to the main pipe, i.e. flange 4 with flange 6 and, accordingly, flange 5 with flange 7. Then we unscrew the fixing bolts. A temporary technological insert 11 is fixed on the sector 20, repeating the exact size (between the flanges) of the valve 1. With the help of a hydraulic cylinder 12, a force “P” is applied to the sector 20, which tends to push the valve to the side. The pressure "P" is much less than the pressure of the cylinders 13 (the rod tends to be drawn into the cylinder) the valve is clamped, sector 20 remains at rest. When the flanges 4 and 5 are expanded using the hydraulic cylinder, the pressure force “P” on the rotary sector 20, where the temporary insert 11 is fixed, becomes larger and the valve 1 is “pushed” to the side, and a temporary insert 11, flanges 4 and 5 are compressed again. Instead of the old faulty valve 1, a new valve is mounted to the rotary sector, and in the reverse order, the new valve will replace the old one. Between the insert 11 and the valve 1, a special cleaning knife 15 is fixed to remove the old gasket. The new gasket is firmly attached to the new valve - mechanically or glued. After the new valve locks into place, it remains to fix it with bolts and dismantle the device from the well.

Application example (2). To install the valve on a steel pipe “out of the blue” ie in a place where the valve had not previously stood, it is required to determine the installation location and pipe thickness. Knowing the connecting size of the valve (distance from flange 6 to flange 7) see application example (1), we weld flanges 4 and 5 to the steel pipe. In order for the flanges to dress on the uncut pipe, they must consist of two half rings. They should be assembled on the pipe by welding. The junction of the two halves is carefully cleaned, if necessary, additionally welded, then cleaned again. Those. we achieve the condition of the flanges as before cutting.

After mounting the flanges, we check the compliance of the connecting size by the size of the installed valve. When welding, a gauge can be used that accurately determines the distance between the flanges and the joint plane. Next, determine the thickness of the pipe. The use of an ultrasonic thickness gauge is not always possible, as an option - we twist the roofing screw with a drill, with metal and rubber washers to any place on the pipe section between flanges 4 and 5. When drilling with a self-tapping screw, it is necessary to periodically measure the drilling depth. As soon as the thickness of the pipe is passed, we screw into the hole formed until the end of the screw, restoring the tightness of the pipe. We fix the last measurement - this will be the thickness of the pipe. If the diameter of the pipe is more than 200 mm, then previously to a depth of 4 mm it is possible to drill with a drill “for self-tapping” (usually 3 mm). Once the pipe thickness has been determined, then in front of the flanges 4 and 5, we make ring cuts with a special device, as shown in footnote 16, where: 17 is the pipe section between the flanges, 4 is the flange, 18 is the weld, 19 is the smallest cut distance (from the flange side). The difference from the previously described application example (1) is that in the second case, the rotary sector 20 has one connecting place for the valve and the cleaning knife 15. A device is installed to replace the valves under pressure, then the valve 1 is to be fixed, which needs to be installed. The hydraulic cylinder 12 is in the "rod inside" position. Hydraulic cylinders 13 - without pressure. When we apply pressure to the cylinder 12, the cut pipe is pushed out with the knife 15. When the rod is further extended from the cylinder 12, the rotary sector 20 is rotated, in this case counterclockwise), the valve 1 rises between the flanges 4 and 5. The cylinders 13 are compressed at this moment - flanges 4 and 5 are firmly fixed between the flanges 6 and 7. Further, the actions are carried out according to the application 1. The alignment of the valve holes and the welded flanges is achieved by initially setting the stops 14 according to the calibrated caliber.

The technical result is achieved by the design of the claimed device, which allows for the replacement of a faulty valve with a working one without shutting off the pressure in the water supply network, without shutting off the water supply in the main pipe, without welding a temporary bypass pipeline, and thereby reduce the time to eliminate the malfunction, which is an important parameter in eliminating accident.

Claims (1)

A device for changing gate valves under pressure, comprising parallel-mounted sliding frames, an associated pipe attachment unit, characterized in that the sliding frames are connected by hydraulic cylinders; between them, on the axis of the rotary sector, on each side of the replaced valve, a rotary sector is mounted having a half ring that is detachably connected to another half ring covering the flange of the replaced valve; on the other half ring of the rotary sector, equipped with a temporary insert with a detachable half ring, there is a flange for installing a new valve; the rotary sector is equipped with a hydraulic cylinder, and from the side opposite the valve, it is equipped with a stop, which is made in the form of a figured part with a hole in the center, detachable along the axis of the hole, along the connector line having protrusions on both sides; the protrusions are interconnected by fasteners; the lower part of the stop is made in the form of a semicircle around the perimeter, the upper part is made by the angle around the perimeter, at the top of which a hole is made for attaching the stop to the axis of the rotary sector; lateral vertical parts of the sliding frame have protrusions with holes in which protrusions of the stop are inserted; the central stop hole, through which the connector line passes, has circumferentially located recesses under the protruding fasteners; from the outside, the rotary sector is equipped with a cleaning knife.