CN219282702U - Valve device with pressure installation - Google Patents

Abstract

The utility model provides a valve device with pressure installation, which comprises a supporting mechanism for fixing a first pipeline; and a cutting mechanism including a support base, a sealing box arranged in the support base, and a cutting assembly, wherein the cutting assembly includes a hydraulic cylinder, and a cutter with one end connected with the hydraulic cylinder and the other end extending into the sealing box, wherein the sealing box is provided with a first joint, and the cutter is configured to cut the first pipeline in the sealing box along the axial direction under the driving action of the hydraulic cylinder, so that fluid flowing through the first pipeline can flow out through the first joint, the second pipeline and the valve in sequence. The utility model can play an effective sealing role through the sealing box, thereby avoiding the phenomenon of free open flow after the first pipeline is cut.

Description

Valve device with pressure installation

Technical Field

The utility model relates to the field of pipeline construction of oil and gas field fracturing wellheads, in particular to a valve device installed under pressure.

Background

With the continuous deep development of oil and gas fields, especially the problems of internal leakage, external leakage, rust death, incomplete closing, incomplete opening, leakage of screw rod sealing parts and the like often occur in the wellhead valve of the oil and gas well in the middle and later stages of development, and the problems are increased increasingly.

Currently, the prior art generally implements valve replacement in a pressure relief manner. Because of the higher bottom hole pressure, longer hold-down times are required, which can lead to higher risks in valve replacement at the wellhead. In addition, the mode of replacing the valve can seriously influence the subsequent productivity of the water injection well and the gas well. Therefore, the technology of replacing valves with pressure in high-pressure wells, especially gas wells, has an extremely important role.

CN109424812a discloses a method for installing an additional valve with a pressurized water pipeline. First, a polishing area which is consistent with the shape and the size of a valve port of a valve needs to be polished on the pipe skin of the pipeline. Then, the round steel is welded at a position where the center of the grinding area is not ground, and a valve port is welded at the periphery of the grinding area. And then the round steel is smashed, so that the polishing area is pierced, and the valve is mounted.

The method can realize the purpose of installing the valve on the pressurized pipeline. However, this method cannot be operated in the complex environment of the wellhead valve group and cannot solve the safety problem caused by the high risk environment of the wellhead valve group when the valve is installed under pressure.

Accordingly, it is desirable in the art to provide a pressure-mounted valve assembly that solves the above-described problems.

Disclosure of Invention

The utility model aims to provide a valve device with pressure installation, which can effectively seal through a sealing box, so that the phenomenon of free blowout after a first pipeline is cut is avoided.

According to the present utility model there is provided a pressure-mounted valve device comprising a support mechanism for securing a first conduit; and

a cutting mechanism arranged on the supporting mechanism and comprising a supporting seat, a sealing box arranged in the supporting seat and through which the first pipeline extends, and a cutting assembly, wherein the cutting assembly comprises a hydraulic cylinder arranged outside the supporting seat, and a cutter with one end connected with the hydraulic cylinder and the other end extending into the sealing box,

the sealing box is provided with a first joint capable of being connected with a valve through a second pipeline, and the cutter is configured to be capable of axially cutting the first pipeline in the sealing box under the driving action of the hydraulic cylinder, so that fluid flowing through the first pipeline can flow out through the first joint, the second pipeline and the valve in sequence.

In one embodiment, the sealing box comprises a first box portion and a second box portion disposed above and sealingly connected to the first box portion, wherein the first joint is disposed radially outside the first box portion.

In one embodiment, the pressure mounting valve device further comprises a first clamping plate arranged in the first box body part and a second clamping plate arranged in the second box body part, wherein arc-shaped grooves for radially abutting against the first pipeline are formed in the first clamping plate and the second clamping plate.

In one embodiment, a groove for limiting the axial movement path of the cutter is arranged on the first clamping plate, and a first through groove for allowing the cutter to move into the groove along the axial direction is arranged on the second clamping plate.

In one embodiment, the valve device is installed under pressure, and further comprises a guide assembly arranged in the sealing box, wherein the guide assembly comprises a plurality of guide rods extending into the first box body part along the axial direction, guide plates fixedly connected with the guide rods, and second through grooves arranged on the guide plates and used for guiding the cutters to move axially.

In one embodiment, sealing rings are provided between the second box portion and the first box portion and between the second box portion and the cutter.

In one embodiment, the support mechanism comprises a first bracket and a pair of support rods longitudinally disposed on the first bracket, wherein the support rods radially abut the first pipe via slips.

In one embodiment, the supporting mechanism comprises a second bracket which is configured into an L-shaped structure, a first piston piece which is arranged on the first bracket and used for controlling the axial position of the supporting seat, and a moving assembly which is arranged on the second bracket, wherein the moving assembly comprises a sliding rail, a sliding block which is arranged on the sliding rail and fixedly connected with the bottom end of the supporting seat, and a second piston piece which is used for controlling the longitudinal or transverse position of the supporting seat.

In one embodiment, a second joint is provided at the outlet end of the first conduit,

the pressure-mounted valve device further comprises a third pipeline connected with the second joint and used for receiving fluid from the first pipeline, and a blocking head arranged in the second joint.

Compared with the prior art, the utility model has the advantages that: the utility model can play an effective sealing role through the sealing box, thereby avoiding the phenomenon of free open flow after the first pipeline is cut. In addition, the reverse side of the cutter can form a certain sealing effect on the notch of the first pipeline, so that the fluid flowing through the first pipeline is decelerated after impacting the cutter and falls into the sealing box. In addition, the utility model also establishes a bypass channel consisting of the first joint, the second pipeline and the valve, thereby being capable of rapidly guiding the fluid in the sealing box to the outside, eliminating the potential safety hazard generated by the failure of the wellhead flat valve, and further ensuring the safety of the site environment and the personal safety of constructors.

Drawings

The utility model will be described in detail below with reference to the attached drawing figures, wherein:

fig. 1 schematically shows the structure of a pressure-mounted valve device according to the present utility model;

FIG. 2 is a side view of a seal cartridge in a pressure mounted valve apparatus according to the present utility model;

FIG. 3 is a cross-sectional view of a pressure-mounted valve device according to the present utility model;

FIG. 4 is a schematic view of a second support bracket in a pressure mounted valve apparatus according to the present utility model;

FIG. 5 is a partial cross-sectional view of a pressure-mounted valve device according to the present utility model showing the position between a first clamping plate, a second clamping plate and a first conduit;

fig. 6 is a top view of a second clamping plate in a pressure mounted valve device according to the present utility model.

In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

Detailed Description

In order to make the technical solution and advantages of the present utility model more apparent, exemplary embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some of the embodiments of the present utility model and are not exhaustive of all embodiments. And embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

Fig. 1 schematically shows the structure of a pressure-mounted valve device 100 according to the present utility model.

As shown in fig. 1, the pressure-mounted valve device 100 according to the present utility model mainly includes a support mechanism 1 for fixing a first pipe 6 and a cutting mechanism 2 provided on the support mechanism 1. Wherein the cutting mechanism 2 comprises a support seat 21 and a sealing box 3. The support seat 21 is placed on a second bracket 13 (described later) in the support mechanism 1, thereby providing effective support for the seal box 3. The sealing box 3 is mounted in a support seat 21 and the first duct 6 extends through the sealing box 3, thereby facilitating subsequent cutting of the portion of the first duct 6 that is inside the sealing box 3. The contents of which are described below.

Fig. 3 is a cross-sectional view of a pressure-mounted valve device 100 according to the present utility model.

According to the utility model, the cutting mechanism 2 further comprises a cutting assembly 22, as shown in fig. 3. The cutting assembly 22 includes a hydraulic cylinder 221 and a cutter 222. Wherein the hydraulic cylinder 221 is disposed outside the support base 21, specifically, the hydraulic cylinder 221 is located at the top end of the support base 21. The first end of the cutter 222 is fixedly connected with the hydraulic cylinder 221, and the second end of the cutter 222 extends into the sealing box 3. Therefore, the cutter 222 can cut the first pipe 6 in the sealing case 3 in the axial direction by the driving of the hydraulic cylinder 221.

In one embodiment, as shown in fig. 1, the sealing box 3 has a first joint 312 that can be connected to the valve 7 through the second pipe 8. Preferably, the first joint 312 is a union joint. Therefore, when the cutter 222 cuts the first pipe 6 in the sealing case 3 in the axial direction by the driving of the hydraulic cylinder 221, the fluid flowing through the first pipe 6 can flow out through the first joint 312, the second pipe 8 and the valve 7 in this order. By the method, fluid in the first pipeline 6 can be effectively drained, so that the problem of uncontrolled blowout of a wellhead flat valve (not shown) at present is solved, and the safety of site environment and the personal safety of constructors are further ensured.

Fig. 2 is a side view of the seal box 3 in the pressure-mounted valve device 100 according to the present utility model.

According to the utility model, as shown in fig. 2, the sealing box 3 comprises a first box portion 31 and a second box portion 32. The first box portion 31 is fixedly connected with the supporting seat 21, and the second box portion 32 is located above the first box portion 31 and can form a sealed connection with the first box portion 31. Therefore, after the cutter 222 cuts the first pipe 6 in the sealing case 3 in the axial direction by the driving of the hydraulic cylinder 221, the fluid flowing through the first pipe 6 can circulate only in the sealing case 3. Therefore, the phenomenon of free open flow after the first pipeline 6 is cut can be effectively avoided, and the safety of the construction site environment is further ensured.

In one embodiment of the utility model, the first cassette part 31 is mounted on the support block 21 in a welded manner.

In one embodiment, as shown in fig. 2, the first case portion 31 and the second case portion 32 are each fitted with a plurality of fastening screws 34 in the circumferential direction, so that the sealability of the sealing case 3 can be ensured. In addition, the seal ring 5 (described later) between the first case portion 31 and the second case portion 32 can significantly increase the sealing area under the pressing action of the fastening screw 34, so that the sealing case 3 can be made to have a strong sealing performance, thereby ensuring the overall sealability of the sealing case 3.

In a preferred embodiment, the first joint 312 is disposed radially outside the first cassette part 31. Thus, the fluid in the sealing box 3 can more easily flow through the first joint 312, the second pipe 8 and the valve 7 in sequence to the outside of the blow tank (not shown), thereby providing a good guiding effect for the high pressure fluid flowing through the first pipe 6.

Therefore, the pressurized mounting valve device 100 can split the fluid flowing through the first pipeline 6 under the action of the sealing box 3 and the first joint 312, so that the phenomenon of free blowout after the first pipeline 6 is cut is effectively avoided, and the safety of the construction site environment is further ensured.

According to the present utility model, as shown in fig. 2 and 3, the pressure-mounted valve device 100 further includes a first clamping plate 311 and a second clamping plate 321. Wherein the first clamping plate 311 is arranged in the first cassette part 31 and the second clamping plate 321 is arranged in the second cassette part 32. Therefore, the first pipe 6 can have a stable state under the clamping action of the first clamping plate 311 and the second clamping plate 321, thereby remarkably improving the cutting quality of the pressure-mounted valve device 100 on the first pipe 6. The contents of which are described below.

In one embodiment, as shown in fig. 2, an arc-shaped groove 33 is provided in each of the first clamping plate 311 and the second clamping plate 321. The first clamping plate 311 and the second clamping plate 321 can completely wrap the outer wall of the first pipeline 6 through the arc-shaped groove 33. Thereby, the arc-shaped groove 33 is radially abutted against the first pipe 6, thereby ensuring the fixing effect on the first pipe 6, and further improving the success rate of cutting the first pipe 6 in the sealing box 3.

In addition, because the inner surfaces of the arc-shaped grooves 33 in the first clamping plate 311 and the second clamping plate 321 are closely attached to the outer surface of the first pipeline 6, deformation of the notch of the first pipeline 6 can be effectively avoided when the cutter 222 cuts the first pipeline 6.

In addition, the arc-shaped grooves 33 in the first clamping plate 311 and the second clamping plate 321 can also effectively protect the cutting position of the first pipeline 6, so that the damage to the cutting position of the first pipeline 6 caused by the gushed fluid is effectively avoided.

Fig. 5 is a partial cross-sectional view of the pressure-mounted valve device 100 according to the present utility model, showing the positions between the first clamping plate 311, the second clamping plate 321 and the first pipe 6.

In one embodiment, as shown in fig. 5, the radius of the arc-shaped groove 33 is equal to the radius of the first pipe 6. Therefore, the first clamping plate 311 and the second clamping plate 321 can fully wrap the first pipe 6 through the arc-shaped groove 33, so that the first pipe 6 can be well protected and fixed. Thus, the cutter 222 can accurately cut the first pipe 6 in the sealing box 3, thereby improving the operation efficiency of installing the valve under pressure.

In one embodiment, as shown in fig. 3, a groove 313 is provided on the first clamping plate 311, and the height of the groove 313 is smaller than the maximum height of the first clamping plate 311, so that the axial movement path of the cutter 222 can be effectively limited, thereby ensuring that the cutter 222 can have a stable working environment. Specifically, the cutter 222 continues to travel downward until it axially abuts the groove 313 after cutting the first pipe 6 in the seal box 3 in the axial direction.

Fig. 6 is a top view of the second clamping plate 321 in the pressure-mounted valve device 100 according to the present utility model.

In one embodiment, as shown in fig. 6, the second clamping plate 321 is provided with a first through groove 322, so that the cutter 222 can be allowed to move into the groove 313 along the axial direction, so as to limit the movement track of the cutter 222, and further ensure that the cutter 222 can smoothly and accurately cut the first pipe 6 in the sealing box 3. Thereby, the cutter 222 can more accurately cut the first duct 6 in the sealing case 3 by the combined action of the first through groove 322 and the groove 313.

According to the present utility model, as shown in FIG. 3, the pressure-mounted valve apparatus 100 further includes a guide assembly 4. The guide assembly 4 is provided within the seal box 3 and includes a number of guide bars 41 and guide plates 42. Wherein a plurality of guide rods 41 extend axially into the first box portion 31 to form a fixed connection. The bottom end of the guide plate 42 is fixedly connected with the guide rod 41 for guiding the cutter 222 to move in the axial direction. The contents of which are described below.

In a preferred embodiment, a plurality of guide rods 41 each extend through the second clamping plate 321 and the first clamping plate 311 in sequence to form a fixed connection with the first cassette part 31.

In one embodiment according to the present utility model, as shown in fig. 3, a second through slot 421 is provided on the guide plate 42. Preferably, the second through groove 421 coincides with the first through groove 322 in the axial direction, so that the cutter 222 can be more easily guided to move in the axial direction. Specifically, the cutter 222 can enter the groove 313 through the second through groove 421 and the first through groove 322 in sequence along the axial direction under the driving action of the hydraulic cylinder 221, so as to axially abut against the groove 313, thereby realizing accurate cutting of the first pipeline 6 in the sealing box 3, and further improving the working efficiency and safety of the valve device 100 with pressure.

In a preferred embodiment, the guide plate 42 and the first clamping plate 311 are configured as a dual limiting mechanism. Therefore, the cutter 222 can effectively improve the accuracy of cutting the first pipe 6 and the success rate of cutting the first pipe 6 under the protection and guiding action of the double limiting mechanism, thereby improving the working efficiency of the valve device 100 with pressure.

In one embodiment, as shown in fig. 6, through holes 35 are provided on both the first clamping plate 311 and the second clamping plate 321. Thereby, the guide bar 41 can extend through the through hole 35 sequentially through the second clamping plate 321 and the first clamping plate 311, thereby forming a fixed connection with the first case portion 31.

According to one embodiment of the utility model, the guide rod 41 can always maintain a stable working posture under the fixing action of the sealing box 3; secondly, the first clamping plate 311 and the second clamping plate 321 can always keep a stable working posture under the limit action of the guide rod 41; thirdly, the guide plate 42 can always keep a stable working posture under the supporting action of the guide rod 41.

In summary, in the case that the first clamping plate 311, the second clamping plate 321 and the guide plate 42 have stable working conditions, the valve device 100 can ensure that the cutter 222 always performs the cutting motion along the same axis, so as to ensure the accuracy of the cutting position on the first pipe 6.

In one embodiment, the guide assembly 4 further comprises an axially disposed securing rod 43. The bottom end of the fixing rod 43 is fixedly connected with the first box body part 31, and the top end of the fixing rod 43 is fixedly connected with the guide plate 42. Therefore, the guide plate 42 can maintain a stable operation state by the combined action of the fixing lever 43 and the guide lever 41.

According to one embodiment of the utility model, as shown in fig. 3, a sealing ring 5 is provided between the second box portion 32 and the first box portion 31 and between the second box portion 32 and the cutter 222. Therefore, the whole structure of the sealing box 3 can have good sealing effect under the action of the sealing ring 5, so that the phenomenon that the fluid in the sealing box 3 overflows can be avoided after the first pipeline 6 is cut.

At present, the conventional valve replacing device with pressure can not solve the problems that blowout occurs during operation and blowout liquid causes damage to a production layer and a construction environment. Compared with the prior art, the utility model can effectively limit the flow direction of the fluid flowing through the first pipeline 6 through the sealing box 3, and can effectively guide the flow direction of the fluid flowing through the first pipeline 6 under the action of the cutter 222, thereby effectively avoiding blowout. In addition, the present utility model also enables the fluid in the sealing case 3 to be rapidly guided to the outside through the bypass passage (referring to the first joint 312, the second pipe 8 and the valve 7), and thus enables the controllability of the discharge line (not shown) to be effectively restored.

In one embodiment, as shown in fig. 1, the support mechanism 1 includes a first bracket 11 and a pair of support rods 12. Preferably, the first support 11 is configured as a hollow beam structure and a channel 111 is provided in the beam structure. The support rod 12 is longitudinally disposed within the channel 111 and is capable of radially abutting the first pipe 6 via the slips 121, thereby effectively supporting and securing the first pipe 6.

According to one embodiment of the utility model, the support bar 12 is movable in the longitudinal direction in the channel 111 to adapt to the position of the first pipes 6 of different heights.

According to an embodiment of the present utility model, the first clamping plate 311, the second clamping plate 321 and the supporting rod 12 are configured as a double fixing and limiting mechanism, thereby ensuring that the first pipe 6 can maintain a stable posture when the valve is installed under pressure, and thus improving the success rate and the working efficiency of installing the valve under pressure.

It will be readily appreciated that "axial" in the present disclosure refers to the direction of movement of the cutter 222 in the pressure-mounted valve device 100. "longitudinal" in the present utility model refers to the direction of movement of the support rod 12 in the pressure-mounted valve device 100. The term "transverse direction" in the present utility model refers to a direction perpendicular to the "longitudinal direction", i.e. the direction of extension of the first conduit 6.

Fig. 4 is a schematic view of a second support bracket 13 in a pressure-mounted valve device 100 according to the present utility model. In one embodiment, as shown in fig. 4, the support mechanism 1 further comprises a second bracket 13. Preferably, the second bracket 13 is configured in an L-shaped structure. The support seat 21 is mounted on the second bracket 13 so as to be capable of being adaptively adjusted by the first piston member 14 (described below) and the second piston member (described below), thereby meeting the requirements of the construction environment.

In one embodiment, as shown in fig. 4, the support mechanism 1 further comprises a first piston member 14 and a hydraulic pressure source (not shown). The first piston member 14 includes a first cylinder liner 141 provided on the second bracket 13 and a first piston rod 142 axially provided within the first cylinder liner 141. The first piston rod 142 is fixedly connected with the first bracket 11 through a first ear seat 143. The hydraulic pressure source is in communication with the first cylinder jacket 141 so as to be able to power the first piston rod 142 to cause the cutting mechanism 2 to perform a lifting operation.

In one embodiment, as shown in fig. 4, the support mechanism 1 further comprises a moving assembly 15 provided on the second bracket 13. The moving assembly 15 includes a sled 151 and a slider 152. Wherein the slide rail 151 is provided on the second bracket 13. The sliding blocks 152 are arranged on the sliding rails 151 in a plurality and all manner, and the sliding blocks 152 are fixedly connected with the supporting seat 21, so that the cutting mechanism 2 has the moving capability.

In one embodiment, as shown in fig. 4, the support mechanism 1 further comprises a second piston member and a moving hydraulic cylinder (not shown). The second piston member comprises a second cylinder jacket 16 arranged on the second bracket 13 and a second piston rod 17 arranged longitudinally within the second cylinder jacket 16. The second piston rod 17 is fixedly connected with the bottom end of the supporting seat 21 through the second ear seat 18. The moving hydraulic cylinder communicates with the second cylinder jacket 16 so as to be able to power the second piston rod 17 to cause the cutting mechanism 2 to move in the longitudinal direction.

In another embodiment, the second piston member further has the capability of controlling the movement of the cutting mechanism 2 in the lateral direction, and the specific structure thereof will be referred to above and will not be described herein.

In one embodiment, as shown in fig. 1, a second connector 62 is provided at the outlet end 61 of the first conduit 6 to enable selective connection with a third conduit 9 (described below) or a plug head (described below). Preferably, the second joint 62 is a connecting union.

According to the utility model, the pressure-mounted valve device 100 further comprises a third conduit 9 connectable to the second joint 62. Thus, when the cutter 222 is reset and the valve 7 is closed, the third pipe 9 can be used as a main flow passage to receive the fluid flowing through the inside of the sealing box 3, thereby completing the pressurized installation work.

The pressure-mounted valve device 100 also includes a shutoff head (not shown) disposed within the second connector 62 in accordance with the present utility model. Thus, upon resetting of the cutter 222, the head is effective to block the outlet end 61 of the first conduit 6, thereby causing the second conduit 8 to act as the primary flow path to receive fluid flowing through the seal cartridge 3, thereby completing the pressurized installation.

The present utility model provides a method of pressure mounting a valve using the pressure mounting valve device 100 as described above, comprising the following steps.

First, the position of the first duct 6 is fixed by the support bar 12 on the first bracket 11.

Then, the first duct 6 is extended through the sealing case 3 and fixed with the second clamping plate 321 by the first clamping plate 311.

The first joint 312 is then in communication with the valve 7 via the second conduit 8.

Then, the valve 7 is opened, and water injection pressure test is performed into the sealing box 3 through the second pipe 8 to test the tightness and pressure resistance in the sealing box 3.

Finally, after the test is passed, the cutter 222 is controlled by the hydraulic cylinder 221 to cut off the first pipe 6 in the sealing case 3, so that the fluid flowing through the first pipe 6 can flow into an external storage tank (not shown) through the first joint 312, the second pipe 8 and the valve 7 in this order.

In one embodiment, when the first pipe 6 is cut, the reverse surface of the cutter 222 can form a certain sealing effect on the incision of the first pipe 6, so that the fluid flowing through the first pipe 6 is decelerated after striking the cutter 222, and then can fall into the sealing box 3 and be rapidly discharged through the first joint 312, the second pipe 8 and the valve 7 in sequence. In this way, the valve device 100 can be installed under pressure to effectively avoid the phenomenon of free blowout when the first pipeline 6 is cut, thereby avoiding the safety problem caused by the high-risk environment of the wellhead valve group and further ensuring the safety of the site construction environment.

In addition, the fluid in the first conduit 6 will still rush out at a very high rate after the cutter 222 is reset, so the present utility model provides two solutions to this phenomenon.

First, the second joint 62 is communicated with an external high-pressure main channel (not shown) through the third pipe 9. Therefore, when the cutter 222 is reset and the valve 7 is closed, the fluid flowing through the first pipe 6 flows into the high-pressure main flow passage through the sealing case 3, the second joint 62 and the third pipe 9 in order, thereby restoring the control of the fluid in the first pipe 6.

Second, the second joint 62 is plugged by a plug, and the valve 7 is simultaneously communicated with an external high-pressure main flow passage (not shown). Accordingly, when the cutter 222 is reset, the fluid flowing through the first pipe 6 flows into the high-pressure main flow passage through the sealing case 3, the first joint 312, the second pipe 8, and the valve 7 in this order, thereby restoring the control of the fluid in the first pipe 6.

The utility model provides a valve device with pressure installation, which can effectively seal through a sealing box 3, thereby avoiding free blowout after a first pipeline 6 is cut. In addition, the reverse side of the cutter 222 in the present utility model can also form a certain sealing effect on the incision of the first pipe 6, so that the fluid flowing through the first pipe 6 is decelerated after striking the cutter 222 and falls into the sealing box 3. In addition, the utility model also establishes a bypass path consisting of the first joint 312, the second pipeline 8 and the valve 7, thereby being capable of rapidly guiding the fluid in the sealing box 3 to the outside, eliminating the potential safety hazard caused by the failure of the wellhead flat valve, and further ensuring the safety of the site environment and the personal safety of constructors.

The above is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto. Modifications and variations may readily be made by those skilled in the art within the scope of the present disclosure, and such modifications and variations are intended to be included within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (9)

1. A pressure-mounted valve assembly comprising:

a support mechanism (1) for fixing the first pipe (6); and

a cutting mechanism (2) arranged on the supporting mechanism (1) and comprising a supporting seat (21), a sealing box (3) arranged in the supporting seat (21) and through which the first pipeline (6) extends, and a cutting assembly (22), wherein the cutting assembly (22) comprises a hydraulic cylinder (221) arranged outside the supporting seat (21) and a cutter (222) with one end connected with the hydraulic cylinder (221) and the other end extending into the sealing box (3),

wherein, seal box (3) has first joint (312) that can be connected with valve (7) through second pipeline (8), cutter (222) are constructed can be under the drive action of pneumatic cylinder (221) along axial cutting first pipeline (6) in seal box (3), thereby make the fluid that flows through in first pipeline (6) can pass through in proper order first joint (312), second pipeline (8) with valve (7) and flow.

2. The pressure mounted valve device according to claim 1, characterized in that the sealing box (3) comprises a first box portion (31) and a second box portion (32) arranged above the first box portion (31) and sealingly connected, wherein the first joint (312) is arranged radially outside the first box portion (31).

3. The pressure mounting valve device according to claim 2, further comprising a first clamping plate (311) arranged in the first cassette part (31) and a second clamping plate (321) arranged in the second cassette part (32), wherein arc-shaped grooves (33) for radial abutment with the first pipe (6) are arranged in both the first clamping plate (311) and the second clamping plate (321).

4. A pressure mounted valve arrangement according to claim 3, characterized in that a groove (313) is provided on the first clamping plate (311) for limiting the axial movement path of the cutter (222), and a first through groove (322) is provided on the second clamping plate (321) for allowing the cutter (222) to move axially into the groove (313).

5. The pressure mounted valve device according to claim 4, further comprising a guiding assembly (4) arranged in the sealing box (3) and comprising a number of guiding rods (41) extending axially into the first box portion (31), a guiding plate (42) fixedly connected to the guiding rods (41), and a second through slot (421) arranged on the guiding plate (42) for guiding the axial movement of the cutter (222).

6. A pressure mounted valve arrangement according to claim 5, characterized in that a sealing ring (5) is provided between the second box portion (32) and the first box portion (31) and between the second box portion (32) and the cutter (222).

7. A pressure mounted valve device according to any one of claims 1 to 6, wherein the support means (1) comprises a first bracket (11) and a pair of support rods (12) arranged longitudinally on the first bracket (11), wherein the support rods (12) radially abut the first pipe (6) by means of slips (121).

8. The pressure mounting valve device according to claim 7, characterized in that the support mechanism (1) comprises a second bracket (13) configured as an L-shaped structure, a first piston member (14) arranged on the first bracket (11) for controlling the axial position of the support seat (21), and a moving assembly (15) arranged on the second bracket (13), wherein the moving assembly (15) comprises a slide rail (151), a slide block (152) arranged on the slide rail (151) and fixedly connected with the bottom end of the support seat (21), and a second piston member for controlling the longitudinal or transverse position of the support seat (21).

9. A pressure mounted valve device according to any one of claims 1 to 6, characterized in that a second joint (62) is provided at the outlet end (61) of the first conduit (6),

the pressure-mounted valve device further comprises a third conduit (9) connected to the second joint (62) and adapted to receive fluid from within the first conduit (6), and a stopper disposed within the second joint (62).

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