Pushing and removing device for perforated baffle under pressure

Abstract

The invention discloses an under-pressure trepanning baffle pushing and removing device which comprises a plate pushing mechanism, a feeding assembly and a shell, the feeding assembly comprises a feeding hand wheel and a feeding screw rod, the feeding hand wheel is fixed to the feeding screw rod, and the feeding screw rod is arranged in the shell in a penetrating mode; the push plate mechanism comprises a push plate hand wheel and a push plate screw rod, the push plate hand wheel is fixed at one end of the push plate screw rod, the push plate screw rod is arranged in the feeding screw rod in a penetrating manner, and the other end of the push plate screw rod is connected with the push plate through a transmission mechanism. The transmission mechanism comprises a fixing plate, a transmission gear, a lifting lug, a transmission shaft, push plate arms and a limiting mechanism, the transmission gear is arranged in the limiting mechanism, the push plate arms are arranged on the two sides of the transmission gear, and one end of each push plate arm and the transmission gear are connected to the transmission shaft. In the natural gas pipeline pressure tapping operation, if the cut arc plate falls off, follow-up plugging can be influenced, and the plugging operation cannot be influenced after the falling arc plate is pushed away through the device.

Description

Technical Field

[0001] The invention relates to the technical field of emergency repair of oil and gas pipelines, and in particular to a device for pushing away a baffle plate of a pressure-opened hole. Background Art

[0002] During the pressure-opening operation of natural gas pipelines, the center drill of the hole opener may break or the arc plate extraction device may fail due to reasons such as hole opener failure or improper operation by construction personnel, resulting in the steel pipe arc plate cut by the cylinder cutter being unable to be lifted out with the cylinder cutter and falling into the pipeline, affecting subsequent plugging operations and further affecting construction efficiency and safety. Therefore, a steel pipeline pressure-opening arc plate pushing and removing device is developed to solve the problem of pipeline plugging failure due to arc plate falling. Summary of the invention

[0003] The purpose of the present invention is to provide a device for pushing away baffles during pressure drilling operations in natural gas pipelines. During pressure drilling operations in natural gas pipelines, if the cut arc plates fall off, it will affect subsequent plugging. After the fallen arc plates are pushed away by this device, the plugging operations will not be affected.

[0004] To achieve the above-mentioned purpose, the technical solution of the present application is: a device for pushing away a baffle with a pressurized hole, comprising a push plate mechanism, a feed assembly, and a shell, wherein the feed assembly comprises a feed handwheel and a feed screw, wherein the feed handwheel is fixed on the feed screw, and the feed screw is arranged through the shell; the push plate mechanism comprises a push plate handwheel and a push plate screw, wherein the push plate handwheel is fixed on one end of the push plate screw, and the push plate screw is arranged through the feed screw, and the other end of the push plate screw is connected to the push plate through a transmission mechanism.

[0005] Furthermore, the transmission mechanism includes a fixed plate, a transmission gear, a lifting ear, a transmission shaft, a push plate arm and a limiting mechanism. The limiting mechanism is provided with a transmission gear, and push plate arms are on both sides of the transmission gear. One end of the push plate arm and the transmission gear are connected to the transmission shaft, and a push plate is fixed to the other end of the push plate arm. Both ends of the transmission shaft pass through symmetrically arranged lifting ears, and the lifting ears are installed on the fixed plate, and the fixed plate is located on the push plate screw.

[0006] Furthermore, the transmission mechanism also includes a transmission plate, the limiting mechanism is fixed on the transmission plate, and the transmission plate is located below the fixed plate.

[0007] Furthermore, the limiting mechanism includes a guide rail plate and a limiting column, one end of the guide rail plate and the limiting column is fixed on the transmission plate, and the other end is connected through a connecting plate; a transmission gear is between the guide rail plate and the limiting column.

[0008] Furthermore, the guide rail plate is provided with a tooth groove, which is meshedly connected with the transmission gear.

[0009] Furthermore, a first flange is provided at the bottom of the shell, and the first flange is connected to a second flange at the top of the blocking header by bolts, and the transmission mechanism and the push plate are located in the blocking header.

[0010] Furthermore, by rotating the push plate hand wheel, the push plate screw drives the gear to move along the guide rail plate through the fixed plate, the lifting ear, and the transmission shaft, and then the push plate arm drives the push plate to move.

[0011] Furthermore, the feed hand wheel is rotated to lower the feed screw to a distance of 2R-Lm from the bottom of the working pipe, where R is the radius of the working pipe and L is the length of the push plate.

[0012] As a further feature, the length L of the push plate is greater than the radius of the arc plate of the pressure opening.

[0013] As a further feature, the feed handwheel is located on the non-flange side of the housing.

[0014] The present invention adopts the above technical solution, and can achieve the following technical effects:

[0015] (1) The device transmits the push plate mechanism to the bottom of the open-hole pipe through the feed screw, manually controls the push plate screw to rotate the push plate ±90 degrees, and pushes the arc plate dropped at the bottom of the pipe to the side that does not affect the lower plugger.

[0016] (2) The device has the characteristics of strong versatility, long service life, and simple maintenance. It can be used with plugging manifolds and clamping valves of different calibers to realize the removal of arc plates with various apertures, greatly reducing the cost of use.

[0017] (3) The device is easy to transport and can be used as a backup device. It plays an important role in emergency repair operations of natural gas pipelines, avoiding secondary accidents and greatly reducing construction risks.

[0018] (4) After the design and application of this device, the secondary hole opening construction caused by the falling of the arc plate can be avoided, which saves manpower, material and material costs and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of a device for pushing away a baffle plate with a pressure opening;

[0020] Figure 2 It is an enlarged view of the partial structure of a device for pushing away the baffle plate of a pressure-opening hole;

[0021] Figure 3 The present invention is a schematic diagram of the application of a device for pushing away baffles of a pressure-opening hole.

[0022] Explanation of the serial numbers in the figure: 1. Push plate handwheel; 2. Push plate screw; 3. Feed screw; 4. Feed handwheel; 5. Housing; 6. First flange; 7. Lifting ear; 8. Push plate arm; 9. Push plate; 10. Connecting plate; 11. Guide rail plate; 12. Transmission shaft; 13. Transmission gear; 14. Transmission plate; 15. Fixed plate; 16. Sealing manifold; 17. Clamp valve; 18. Working pipeline; 19. Arc plate. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Example 1

[0025] The present embodiment provides a device for pushing away the baffle plate under pressure to solve the problem that the pipeline cannot be plugged due to the falling of the arc plate. The device mainly includes a push plate mechanism, a feed assembly, and a shell. The feed assembly includes a feed handwheel and a feed screw, and the push plate mechanism includes a push plate handwheel and a push plate screw. The feed handwheel controls the feed screw to send the push plate mechanism to the bottom of the pipeline, and then controls the push plate screw through the push plate handwheel to drive the transmission gear to control the push plate to rotate ±90 degrees, so as to push the arc plate that falls from the bottom of the pipeline to the side that does not affect the lower plugger. Finally, by measuring different pipe diameters, the length of the feed screw and the push plate screw, the length of the push plate arm, and the gear transmission stroke can be designed to ensure that the rotation angle of the push plate covers arc plates of different sizes.

[0026] The bottom of the shell is provided with a first flange, which is connected to the second flange on the top of the plugging manifold by bolts. By adapting to plugging manifolds and clamping plate valves of different sizes, it can be applied to the push-out of DN300-DN800 opening arc plates. The structural design is safe and reliable. By measuring the distance from the bottom flange of the device to the center of the lower pipeline and marking the feed screw accordingly, the push plate mechanism can be accurately controlled to fall to the appropriate position. It can be used in conjunction with the existing clamping plate valve and plugging manifold to realize the arc plate push-out function.

[0027] The operation process of the above device is:

[0028] S1. Clearly define the radius R of the operating pipeline and the radius of the arc plate with pressure opening;

[0029] S2. Ensure that the length L of the push plate is greater than the radius of the arc plate with pressure opening;

[0030] S3. Rotate the push plate hand wheel, so that the push plate screw drives the gear to move along the guide rail through the fixed plate, the lifting ear, and the transmission shaft, and then the push plate arm on the transmission shaft drives the push plate to move to the leftmost side;

[0031] S4. Turn the feed hand wheel to lower the feed screw to a distance of about 2R-Lm from the working pipeline;

[0032] S5. Rotate the push plate handwheel to make the push plate screw drive the gear to move along the guide rail through the fixed plate, the lifting ear and the transmission shaft, and then the push plate arm on the transmission shaft drives the push plate to move to the far right to push away the fallen arc plate to achieve the desired purpose.

[0033] The natural gas pipeline mileage of Xinglongtai Gas Transmission Branch is about 456km, with pipe diameters ranging from D219 to D820, and the highest operating pressure is 3.0MPa and the lowest is 0.1MPa. The pipeline is inspected all year round, and the corresponding pipelines are maintained at defective points. The process pipelines are also often modified, so the pressure opening operation is often carried out. After the design and manufacture of this device, it can be applied to the maintenance and modification of natural gas pipelines, and to a certain extent ensure the smooth progress of construction operations and improve work efficiency. After the design and application of this device, the secondary opening construction caused by the falling of the arc plate can be avoided, saving manpower, material and material costs, and improving construction efficiency. Taking the DN800 pipe diameter opening construction as an example, including labor costs, material costs, machinery costs, and main material costs, a single time can save up to more than 68,000 yuan.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for pushing away baffles for opening holes under pressure, characterized in that: It includes a push plate mechanism, a feed assembly, and a shell. The feed assembly includes a feed handwheel and a feed screw. The feed handwheel is fixed on the feed screw, and the feed screw is arranged through the shell; the push plate mechanism includes a push plate handwheel and a push plate screw. The push plate handwheel is fixed on one end of the push plate screw, and the push plate screw is arranged through the feed screw. The other end of the push plate screw is connected to the push plate through a transmission mechanism.

2. The device for removing the baffle plate of a pressure-opened hole according to claim 1, characterized in that: The transmission mechanism includes a fixed plate, a transmission gear, a lifting ear, a transmission shaft, a push plate arm and a limiting mechanism. The limiting mechanism is provided with a transmission gear, and push plate arms are on both sides of the transmission gear. One end of the push plate arm and the transmission gear are connected to the transmission shaft, and a push plate is fixed to the other end of the push plate arm. Both ends of the transmission shaft pass through symmetrically arranged lifting ears, and the lifting ears are installed on the fixed plate, and the fixed plate is located on the push plate screw.

3. A device for removing baffles of a pressure-opened hole according to claim 1 or 2, characterized in that: The transmission mechanism also includes a transmission plate, the limiting mechanism is fixed on the transmission plate, and the transmission plate is located below the fixed plate.

4. The device for removing the baffle plate of a pressure-opened hole according to claim 3, characterized in that: The limiting mechanism comprises a guide rail plate and a limiting column, one end of the guide rail plate and the limiting column are fixed on the transmission plate, and the other end is connected through a connecting plate; a transmission gear is arranged between the guide rail plate and the limiting column.

5. A device for removing baffles for opening holes under pressure according to claim 4, characterized in that: The guide rail plate is provided with a tooth groove, which is meshed with the transmission gear.

6. The device for removing baffles of a pressure-opened hole according to claim 1, characterized in that: A first flange is provided at the bottom of the shell, and the first flange is connected to a second flange at the top of the plugging header through bolts. The transmission mechanism and the push plate are located in the plugging header.

7. The device for removing baffles of a pressure-opened hole according to claim 1, characterized in that: Rotate the push plate handwheel, and the push plate screw drives the gear to move along the guide rail through the fixed plate, the lifting ear, and the transmission shaft, and then the push plate arm drives the push plate to move.

8. The device for removing baffles of a pressure-opened hole according to claim 1, characterized in that: Rotate the feed handwheel to lower the feed screw to a distance of 2R-Lm from the bottom of the working pipe, where R is the radius of the working pipe and L is the length of the push plate.

9. The device for removing baffles of a pressure-opened hole according to claim 8, characterized in that: The length L of the push plate is greater than the radius of the arc plate of the pressure opening.

10. The device for removing baffles of a pressure-opened hole according to claim 1, characterized in that: The feed hand wheel is located on the non-flange side of the housing.

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