CN201731111U - Pipeline operation equipment and by-pass valve thereof - Google Patents

Abstract

The utility model provides pipeline operation equipment and a bypass valve thereof. Wherein the bypass valve comprises: an outer drum, the outer drum forms a plurality of outer notches; an inner drum, pivotally connected inside the outer drum, and the inner drum forms a plurality of inner slots; The relative rotation of the outer drum and the inner drum forms a effusion channel when the outer notch and the inner notch are aligned, and when the outer notch and the inner notch are completely staggered, the effusion channel is closed. The pipeline operation equipment and its bypass valve of the utility model, when working, the operation of the bypass valve does not depend on the pressure difference of the fluid in the pipeline, is not affected by the fluid pressure difference and pressure fluctuation, and can quickly and accurately realize flow control , so that the speed of the pipeline operation equipment is controlled within an ideal predetermined range, the operation is stable, and the control process is very simple.

Description

Pipework equipment and its bypass valve

technical field

The utility model relates to equipment used in fluid movement occasions, in particular to a pipeline operation device and a bypass valve thereof.

Background technique

Bypass valves are widely used in various fluid movement occasions to realize functions such as bypass, pressure reduction and speed regulation. For example, a bypass valve can be installed on the pipeline work equipment to regulate and control the speed of the pipeline work equipment traveling in the pipeline. Common pipeline operation equipment includes, for example, pipe pigs, magnetic flux leakage detectors, and pipeline robots. in:

Pipe cleaners are used to clean pipes. The magnetic flux leakage detector detects potential dangers such as deformation and corrosion of pipelines through its electronic components, and detects and handles them in advance to prevent these potential dangers from causing major accidents in the future. The pipeline robot carries a variety of sensors and operating devices on the basis of the pig, such as CCD camera position and attitude sensors, ultrasonic sensors, eddy current sensors, pipeline cleaning devices, pipeline interface welding devices, anti-corrosion spraying devices and other operating devices. The functions of both the pipeline controller and the magnetic flux leakage detector can realize more complex pipeline operations.

At present, except for pipeline robots with their own power, almost all pipeline operation equipment relies on the pressure difference between the front and rear ends of the equipment as the driving force (usually the fluid pressure upstream of the rear end of the pipeline operation equipment is greater than the fluid pressure downstream of the front end, thus forming a pressure difference between the rear end and the rear end of the equipment. The power source that pushes the pipeline operation equipment forward), but the pressure difference will fluctuate with the upstream and downstream pressure changes, which will cause the speed of the pipeline operation equipment to fluctuate and become unstable; and more and more current pipeline transportation tends to The characteristics of large flow, high pressure and fast flow rate will cause the pipeline operation equipment to be carried out too fast. The pipeline operation equipment is too fast and unstable, which will cause the following problems:

1. The expected working effect of the pipeline operation equipment is not ideal. As far as the pig is concerned, this problem is especially obvious in the gas pipeline. The high speed will cause serious bypass in the upstream and downstream of the pig, so that the fluid cannot be completely removed. The electronic components such as sensors installed in the magnetic flux leakage detector need a certain reaction time when making a detection. When the magnetic flux leakage detector runs too fast in the pipeline, these electronic components pass through before they can respond. If the point of failure is excluded, the potential danger of the pipeline cannot be successfully detected, which seriously affects the effect of magnetic flux leakage detection. For the pipeline robot, the expected effect cannot be achieved as well.

2. It is harmful to the pipeline that the pipeline operation equipment runs on. The inner wall of the pipeline has a drag-reducing or anti-corrosion coating. The high-speed and vibrating pipeline operation equipment will drive mechanical impurities (sand) to produce strong friction and damage the coating. If the coating is damaged in a large area, it will increase the friction of the pipeline, cause corrosion, and reduce the life of the pipeline.

3. It is dangerous to the operation. Tons of pipeline operation equipment running at a speed of more than ten meters per second will generate huge momentum, which will have a huge impact on elbows, passing ball indicators, ball receiving cylinders, etc., and may damage the equipment or the pipeline operation equipment itself. There is a risk of accidents.

It can be seen that controlling the travel speed and stability of pipeline operation equipment is an indispensable subject for research on pipeline operation equipment. At present, people mainly install a bypass valve in the pipeline operation equipment to realize the control of speed and stability. A relatively common bypass valve includes a casing and a cylinder inside the casing. The cylinder is composed of a cylinder liner and a piston. Wherein, a discharge gap is formed between the front end surface of the cylinder liner and the inner surface of the front wall of the housing, and the piston is slidably arranged in the cylinder liner. The cylinder liner is fixed in the casing, and the rear end surface of the piston and the cylinder liner form another closed cylinder rear chamber. When the piston slides back and forth in the cylinder liner, the outer wall of the piston will block the discharge gap. When the piston stops at different positions, different sizes of discharge gaps can be formed. In this way, the flow control can be realized through the forward and backward movement of the piston. The working principle of the bypass valve is to switch the fluid flowing into the front chamber and the rear chamber through a three-position two-way solenoid valve. When the front chamber introduces low-pressure fluid downstream from the front end, and the rear chamber introduces high-pressure fluid upstream from the rear end, the fluid in the rear chamber will push the piston forward, and the piston will close the effusion gap to stop the effusion; the front chamber will introduce high-pressure fluid upstream from the rear end. When the fluid and the rear chamber introduce low-pressure fluid from the front and downstream, the fluid in the front chamber will compress the fluid in the rear chamber to move the piston backward, and the effusion gap is completely opened to start effusion. Although the bypass valve can adjust the speed, it still has the following disadvantages:

1. When this bypass valve is working, it needs to be controlled by a solenoid valve to switch the upstream and downstream fluids into the front chamber or the rear chamber, and then the piston is driven by the fluid pressure difference to change the size of the effusion gap. The control is relatively complicated. .

2. When this bypass valve is working, it still relies on the pressure difference between the upstream and downstream in the pipeline to achieve flow regulation. The working process will be affected and restricted by the pressure difference between the upstream and downstream in the pipeline. When the pressure difference is small, the piston moves slowly. , unable to achieve fast adjustment, action lag, and when the pressure difference is zero, the piston will have no way to move, so in the actual operation process, it is often necessary to coordinate and control the fluid pressure difference between upstream and downstream to achieve the expected progress speed , the operation is difficult; and because the fluid will have pressure fluctuations, the piston cannot accurately move to the specified position according to the requirements. To maintain a constant effusion gap, the action of the bypass valve is affected by pressure fluctuations and cannot precisely control the flow.

Utility model content

The technical problem to be solved by the utility model is to provide a pipeline operation equipment and its bypass valve. When working, the operation of the bypass valve does not depend on the pressure difference of the fluid in the pipeline, and is not affected by the fluid pressure difference and pressure fluctuations. It can quickly and accurately realize the flow control, so that the speed of the pipeline operation equipment can be controlled in the ideal predetermined range, the operation is stable, and the control process is very simple.

A bypass valve provided by the utility model includes:

an outer drum forming a plurality of outer slots;

an inner drum pivotally connected inside the outer drum, the inner drum forms a plurality of inner notches;

Through the relative rotation of the outer drum and the inner drum, a effusion channel is formed when the outer notch and the inner notch are aligned, and when the outer notch and the inner notch are completely staggered, the effusion channel is closed.

In the present utility model, the outer drum is composed of an outer end wall and a plurality of outer arc-shaped pieces connected to the outer end wall, and an outer notch is formed between adjacent outer arc-shaped pieces. ; The inner drum is composed of an inner end wall and a plurality of inner arc-shaped pieces connected to the inner end wall, and an inner notch is formed between adjacent inner arc-shaped pieces.

In the present invention, the number and curvature of the outer arc-shaped slices of the outer drum and the inner arc-shaped slices of the inner drum are equal, and they are evenly distributed along the circumferential direction.

In the utility model, the central angles of the plurality of outer arc-shaped pieces are equal, the central angles of the plurality of inner arc-shaped pieces are equal, and the central angles of the inner arc-shaped pieces are greater than the central angle of the outer notch, so Seal fit between the outer surface of the inner drum and the inner surface of the outer drum.

In the present invention, the plurality of outer slots extend to the outer end wall of the outer drum, and the plurality of inner slots extend to the inner end wall of the inner drum.

In the utility model, the inner drum is provided with a pivot shaft, the outer end wall of the outer drum is provided with a bearing seat, and the other end of the outer drum opposite to the outer end wall is provided with a flange. A bearing bracket is connected to the flange, and a bearing seat is arranged at the center of the bearing bracket, and the two ends of the inner drum are pivotally connected to the outer end wall of the outer drum through two bearing shafts. And in the bearing seat on the bearing bracket, the inner rotating drum is kept concentric with the outer rotating drum.

In the present utility model, radially distributed stiffener plates are respectively connected between each inner arc-shaped piece of the inner drum and the pivot shaft.

In the utility model, the flange has a tapered surface.

The utility model also provides a pipeline operation equipment, including a main body of the equipment, and a bypass valve is installed in the main body of the equipment, and the bypass valve includes:

an outer drum forming a plurality of outer slots;

an inner drum pivotally connected inside the outer drum, the inner drum forms a plurality of inner notches;

Through the relative rotation of the outer drum and the inner drum, a effusion channel is formed when the outer notch and the inner notch are aligned, and when the outer notch and the inner notch are completely staggered, the effusion channel is closed.

In the utility model, the pipeline operation equipment is a pig, a magnetic flux leakage detector or a pipeline robot.

According to the above scheme, the effect of the utility model compared with the existing structure is remarkable: the pipeline operation equipment and the bypass valve of the utility model do not depend on the pressure difference of the fluid in the pipeline at all when working, and are not affected by the fluid pressure difference. and the influence of pressure fluctuations, only according to the signal command, the motor and other power components drive the inner drum and the outer drum to rotate relative to each other, and the opening area of the effusion channel can be changed at any time. The bypass valve has instant, fast and precise action when it works characteristics, so that the flow control can be realized quickly and accurately, so as to control the speed of the pipeline operation equipment in the ideal predetermined range, and the operation is stable, and the bypass valve of the utility model only needs to control the relative rotation of the inner and outer drums according to the instructions. Current limiting is possible, and the control process is very simple.

Description of drawings

Fig. 1 is a perspective view of the outer drum of the utility model.

Fig. 2 is a perspective view of the inner drum of the utility model.

Fig. 3 is a perspective view of the bypass valve of the present invention when the flow limiting channel is fully opened.

Fig. 4 is a perspective view of the bypass valve of the present invention when the flow limiting channel is completely closed.

Fig. 5 is a schematic diagram of an embodiment of the utility model applied to a pig.

Detailed ways

Embodiment 1

As shown in Figures 1-4, the utility model provides a bypass valve 100, including:

The outer drum 1, the outer drum 1 is composed of an outer end wall 11 and a plurality of outer arc-shaped pieces 12 connected to the outer end wall 11, and a plurality of outer notches are formed between pairs of adjacent outer arc-shaped pieces 12 13. A flange 14 is provided at the other end of the outer drum 1 relative to the outer end wall 11, and a bearing bracket 15 is connected to the flange 14 through screw elements, and the center of the bearing bracket 15 and the outer drum 1 The center of the outer end wall 11 is respectively provided with a bearing seat 16, 17;

The inner drum 2, the inner drum 2 is composed of an inner end wall 21 and a plurality of inner arc-shaped pieces 22 connected with the inner end wall 21, and a plurality of inner notches are formed between pairs of adjacent inner arc-shaped pieces 22 23. The central angle of the inner arc-shaped piece 22 of the inner drum 2 is not less than (that is, equal to or slightly larger than) the central angle of the outer notch 13 of the outer drum 1 to achieve a sealing effect. The inner drum 2 is provided with a pivot joint A shaft 24, one end of the pivot shaft 24 is connected to the bearing seat 17 on the outer end wall 11 of the outer drum 1 through, for example, a tapered roller bearing, and the other end of the pivot shaft 24 is connected to the bearing bracket 15 through, for example, a tapered roller bearing The bearing seat 16 on the top is connected, so that the inner drum 2 is concentrically pivoted inside the outer drum 1, and the outer drum 1 can be fixed when working, and the inner drum 2 can rotate freely around the pivot shaft 24, preferably Make the inner diameter of the outer drum 1 slightly larger than the outer diameter of the inner drum 2 to ensure that the inner drum 2 can rotate freely without interfering with the outer drum 1, but the outer surface of the inner drum 2 should be in contact with the outer drum 1 The sealing fit between the inner surfaces of the outer drum 1, specifically the sealing fit between the outer surface of the inner arc-shaped sheet 22 of the inner drum 2 and the inner surface of the outer arc-shaped sheet 12 of the outer drum 1, so as to achieve the required sealing performance;

When the bypass valve 100 enters the working state, the power such as a motor drives the inner drum 2 to rotate relative to the outer drum 1, as shown in Figure 3, when the outer notch 13 and the inner notch 23 are aligned, that is, the inner rotation When the inner arc-shaped piece 22 of the cylinder 2 rotates to coincide with the outer arc-shaped piece 12 of the outer drum 1, the effusion channel 3 is formed, and the bypass valve 100 is fully opened at this time, and the bypass volume of the fluid is the largest; As shown in Figure 4, when the outer notch 13 and the inner notch 23 are completely staggered, that is, when the inner arc-shaped piece 22 of the inner drum 1 rotates to completely cover the outer notch 13 of the outer drum 1, the effusion channel 3 is closed, At this moment, the bypass valve 100 is in a completely closed state, and the bypass volume of the fluid is minimum. Therefore, between the two bypass limit values, according to different working conditions, the size of the flow-limiting channel 3 can be adjusted by changing the relative positions of the inner and outer drums 2 and 1, so as to realize the change of the bypass volume, thereby The flow control can be realized quickly and accurately, and the control process is very simple.

As shown in Figures 1 to 4, the number of the outer arc-shaped sheets 12 of the outer drum 1 and the inner arc-shaped sheets 22 of the inner drum 2 are equal (for example, six), the curvatures are equal, and they are evenly distributed along the circumferential direction, Six evenly distributed flow-limiting channels 3 can be formed. The central angles of six outer arc-shaped sheets 12 are equal, for example, 30 degrees, and the total central angles of the six outer arc-shaped sheets 12 account for half of the 360-degree central angle of the entire outer drum 1. The outer notch 13 is rectangular, and the central angle It is also 30 degrees, and the total central angle of the six outer notches 13 accounts for the other half of the 360 degree central angle of the entire outer rotating cylinder. The inner drum 2 is basically the same as the outer drum 1, and the central angles of the six inner arc-shaped pieces 22 are also equal, and the inner notches 23 are rectangular. The sealing performance is better under the state of dead, and the central angle of inner arc-shaped sheet 22 is slightly larger than the central angle of the outer notch 13 of outer drum 1, for example, the center of circle of each inner arc-shaped sheet 22 of inner drum 2 can be made The angle is 32 degrees, which is slightly larger than the central angle of 30 degrees of the outer notch 13 of the outer drum 1, and the central angle of each inner notch 23 is 28 degrees, so the sealing is more reliable. It is conceivable that in the present utility model, the flow-limiting channels 3 are not limited to the aforementioned six, and other numbers are also available.

As shown in Figures 1 to 4, the plurality of outer notches 13 of the outer drum 1 further extend to the outer end wall 11 of the outer drum 1, that is, the outer end wall 11 is hollowed out, and the outer end wall 11 presents a bearing Seat 17 is the petal shape of the center of circle. The multiple inner notches 23 of the inner drum 2 also extend to the inner end wall 21 of the inner drum 2 , the inner end wall 21 is also hollowed out, and the inner end wall 21 is in the shape of a petal centered on the pivot shaft 24 . In this way, the restricting channel 3 has an open straight flow path, and when the fluid flows into the bypass valve 100, the flow direction of the fluid will not change, and no turbulence will occur. It is conceivable that the outer end wall 11 of the outer drum 1 and the inner end wall 21 of the inner drum 2 can be in the shape of a non-hollow flat plate. At this time, when the fluid flows into the bypass valve 100, it needs to pass through the flow-limiting channel located on the side. 3 inflows.

As shown in Figure 2, radially distributed reinforcing ribs 25 are respectively connected between each inner arc-shaped piece 22 of the inner drum 2 and the pivot shaft 24, and the reinforcing rib 25 plays a role of strengthening and fixing to prevent the inner arc-shaped piece 22 out of shape.

As shown in Figures 1, 3, and 4, the flange 14 has a conical surface 141, which acts as a guide to prevent the fluid from eddy currents.

Embodiment 2

As shown in FIG. 5 , this embodiment provides a pipeline operation equipment including a bypass valve 100 in Embodiment 1, such as a pig 10. The pig 10 includes an equipment body 101, and a bypass valve is installed in the equipment body 101. The valve 100 and the bypass valve 100 have been described in detail in Embodiment 1 and will not be repeated here.

In the absence of the bypass valve 100, the pressure difference between the front and rear ends of the pig 10 fluctuates with the fluid pressure changes upstream and downstream, and the speed of the pig 10 driven forward by the pressure difference will therefore also fluctuate. The device 10 will be too fast because of the large fluid pressure difference between upstream and downstream. After the bypass rotary valve 100 is installed, when the speed of the pig 10 is high, that is, when the pressure difference between the front and rear of the pig 10 is large, the flow-limiting channel 3 of the bypass valve 100 is opened by a certain amount, and the fluid inside the pig 10 Bypass leakage, the pressure difference between the front and rear of the pig 10 becomes smaller, and the speed decreases; on the contrary, when the speed of the pig 10 is small, the flow-limiting channel 3 of the bypass valve 100 is closed by a certain amount, and the internal leakage of the pig 10 The flow rate decreases, the pressure difference between the front and rear becomes larger, and the speed also increases accordingly. The size and switch of the flow-limiting channel 3 of the bypass valve 100 are controlled by the circuit according to the corresponding speed requirements, and the control is simple, so that the speed of the pipeline operation equipment can be controlled within an ideal predetermined range, and the operation is stable.

It is conceivable that the pipeline operation equipment may also be a magnetic flux leakage detector or a pipeline robot, etc., which will not be described in detail.

The bypass valve 100 of the present utility model can be installed and used in the direction shown in FIG. The inside of the valve 100 flows out from one end of the bearing bracket 15 , and when the fluid flows out, it will diffuse outward along the tapered surface 141 of the flange 14 . It is conceivable that the bypass valve 100 can also be installed and used in the direction opposite to that of FIG. When the fluid flows out from the inner end wall 21 of the cylinder 2 and flows into the bypass valve 100, it will gather inward along the tapered surface 141 of the flange 14, and no vortex phenomenon will occur.

The above is only a specific embodiment of the utility model, and of course it cannot limit the implementation scope of the utility model. All equivalent changes and modifications made according to the content of the utility model should belong to the protection scope of the utility model.

Claims (10)

1. a bypass valve is characterized in that, comprising:

Outer rotaring tube, described outer rotaring tube forms a plurality of exterior notch;

Interior rotating cylinder is articulated in described outer rotaring tube inside, and described interior rotating cylinder forms a plurality of inner tank mouths;

By relatively rotating of outer rotaring tube and interior rotating cylinder, when exterior notch and inner tank mouths contraposition, form the cascading water passage, and when exterior notch and inner tank mouths stagger fully, described cascading water passage sealing.

2. bypass valve according to claim 1 is characterized in that, described outer rotaring tube is made of with a plurality of outer arcuate sheets that are connected with described outer end wall outer end wall, forms a described exterior notch between the adjacent outer arcuate sheet; Rotating cylinder is made of with a plurality of arc sheets that are connected with described inner end wall inner end wall in described, forms a described inner tank mouths between the adjacent arc sheet.

3. bypass valve according to claim 2 is characterized in that, the outer arcuate sheet of described outer rotaring tube equates with the arc sheet quantity of described interior rotating cylinder, curvature equates and evenly distribution along the circumferential direction respectively.

4. bypass valve according to claim 3, it is characterized in that, the central angle of described a plurality of outer arcuate sheets equates, the central angle of described a plurality of arc sheets equates, the central angle of described arc sheet is sealed and matched between the outer surface of described interior rotating cylinder and the internal surface of described outer rotaring tube greater than the central angle of exterior notch.

5. bypass valve according to claim 3 is characterized in that described a plurality of exterior notch extend to the outer end wall of described outer rotaring tube, and described a plurality of inner tank mouths extend to the inner end wall of described interior rotating cylinder.

6. bypass valve according to claim 2, it is characterized in that, rotating cylinder is provided with drive-connecting shaft in described, the outer end wall of described outer rotaring tube is provided with bearing support, the other end in the relative outer end wall of described outer rotaring tube is provided with flange plate, is connected with bearing bracket on described flange plate, is provided with bearing support at the center of described bearing bracket, the two ends of described interior rotating cylinder are held axle by two respectively and are articulated in the outer end wall and the bearing support on the bearing bracket of described outer rotaring tube, and described interior rotating cylinder keeps concentric with outer rotaring tube.

7. bypass valve according to claim 6 is characterized in that, is connected with radially-arranged reinforcement gusset respectively between each arc sheet of described interior rotating cylinder and the described pivotal axis.

8. bypass valve according to claim 6 is characterized in that described flange plate has the conical surface.

9. a pipeline operations equipment comprises the equipment main body, in described equipment main body bypass valve is installed, and it is characterized in that described bypass valve comprises:

Outer rotaring tube, described outer rotaring tube forms a plurality of exterior notch;

Interior rotating cylinder is articulated in described outer rotaring tube inside, and described interior rotating cylinder forms a plurality of inner tank mouths;

By relatively rotating of outer rotaring tube and interior rotating cylinder, when exterior notch and inner tank mouths contraposition, form the cascading water passage, and when exterior notch and inner tank mouths stagger fully, described cascading water passage sealing.

10. pipeline operations equipment according to claim 9 is characterized in that described pipeline operations is equipped for wiper, flux leakage detector or pipeline robot.

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