A press-through hole baffle pushing and removing device

Abstract

The application discloses a push-removing device for a pressure tapping baffle, which comprises a push plate mechanism, a feeding assembly and a shell. The feeding assembly comprises a feeding hand wheel and a feeding screw, and the feeding hand wheel is fixed on the feeding screw which is arranged in the shell in a penetrating mode. The push plate mechanism comprises a push plate hand wheel and a push plate screw, the push plate hand wheel is fixed on one end of the push plate screw which is arranged in the feeding screw in a penetrating mode, and the other end of the push plate screw 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, a push plate arm and a limiting mechanism. The transmission gear is arranged in the limiting mechanism, the transmission gear is provided with the push plate arm on both sides, and one end of the push plate arm and the transmission gear are connected with the transmission shaft. In the natural gas pipeline pressure tapping operation, if the cutting arc plate falls, the subsequent plugging will be affected. After the arc plate falling is pushed and removed by the device, the plugging operation will not be affected.

Description

Technical Field

[0001] This invention relates to the field of oil and gas pipeline maintenance and repair technology, specifically to a pressurized perforated baffle removal device. Background Technology

[0002] During live tapping operations on natural gas pipelines, malfunctions in the tapping tool or improper operation by construction personnel can lead to breakage of the center drill or failure of the arc plate extraction device. This can cause the steel pipe arc plate cut by the cutter to fall into the pipeline, affecting subsequent sealing operations and consequently impacting construction efficiency and safety. Therefore, a steel pipe arc plate removal device for live tapping of natural gas pipelines has been developed to solve the problem of pipeline sealing being impossible due to the arc plate falling off. Summary of the Invention

[0003] The purpose of this invention is to provide a device for removing a baffle plate during pressurized tapping of natural gas pipelines. If the cutting arc plate falls off during pressurized tapping operations, it will affect the subsequent sealing. By using this device to remove the fallen arc plate, the sealing operation will not be affected.

[0004] To achieve the above objectives, the technical solution of this application is as follows: a pressure-operated perforated baffle removal device, comprising a push plate mechanism, a feeding assembly, and a housing. The feeding assembly includes a feeding handwheel and a feeding screw. The feeding handwheel is fixed on the feeding screw, which is disposed through the housing. 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, which is disposed through the feeding screw. The other end of the push plate screw is connected to the push plate via a transmission mechanism.

[0005] Furthermore, the transmission mechanism includes a fixed plate, a transmission gear, a lifting lug, a transmission shaft, a push plate arm, and a limiting mechanism. The limiting mechanism contains a transmission gear, with push plate arms 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 the other end of the push plate arm is fixed with a push plate. The two ends of the transmission shaft have symmetrically arranged lifting lugs, which are mounted on the fixed plate. The fixed plate is located on the push plate screw.

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

[0007] Furthermore, the limiting mechanism includes a guide rail plate and a limiting post. One end of the guide rail plate and the limiting post are fixed to the transmission plate, and the other end is connected by a connecting plate. A transmission gear is located between the guide rail plate and the limiting post.

[0008] Furthermore, the guide rail plate is provided with a toothed groove, which meshes with the transmission gear.

[0009] Furthermore, the bottom of the housing is provided with a first flange, which is bolted to a second flange at the top of the sealing manifold, and the transmission mechanism and push plate are located inside the sealing manifold.

[0010] Furthermore, by rotating the push plate handwheel, the push plate screw drives the gear to move along the guide rail through the fixed plate, lifting lug, and transmission shaft, thereby causing the push plate arm to move the push plate.

[0011] Furthermore, rotate the feed handwheel to lower the feed screw to a distance of 2R-Lm from the top of the working pipe, where R is the radius of the working pipe and L is the total length of the push plate and push plate arm.

[0012] Furthermore, the total length L of the push plate and push plate arm is greater than the radius of the arc plate with the pressure opening.

[0013] Furthermore, the feed handwheel is located on the non-flange side of the housing.

[0014] By adopting the above technical solution, the present invention can achieve the following technical effects: (1) The device drives the push plate mechanism to the bottom of the opening pipe through the feed screw. The push plate screw is manually controlled to achieve ±90 degrees rotation of the push plate, and the arc plate falling off the bottom of the pipe is pushed to the side that does not affect the lower plug.

[0015] (2) The device has the characteristics of strong versatility, long service life and simple maintenance. When used with sealing manifolds and clamp valves of different diameters, it can realize the removal of opening arc plates of various diameters, which greatly reduces the cost of use.

[0016] (3) The device is easy to transport and can be used as a backup device. It plays an important role in emergency repair of natural gas pipelines, avoids secondary accidents, and greatly reduces construction risks.

[0017] (4) After the device is designed and applied, it can avoid secondary drilling construction caused by the fall of the arc plate, save manpower, material resources and material costs, and improve construction efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of a pressurized perforated baffle removal device; Figure 2 This is an enlarged view of a portion of the structure of a pressurized perforated baffle removal device; Figure 3 This is a schematic diagram of the application of a pressurized perforated baffle removal device.

[0019] The numbers in the diagram are explained as follows: 1. Push plate handwheel; 2. Push plate screw; 3. Feed screw; 4. Feed handwheel; 5. Housing; 6. First flange; 7. Lifting lug; 8. Push plate arm; 9. Push plate; 10. Connecting plate; 11. Guide rail plate; 12. Drive shaft; 13. Drive gear; 14. Drive plate; 15. Fixing plate; 16. Sealing manifold; 17. Clamp valve; 18. Working pipeline; 19. Arc plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0021] Example 1 This embodiment provides a pressurized perforated baffle removal device to solve the problem of pipe sealing being impossible due to the fall of an arc plate. The device mainly includes a push plate mechanism, a feeding assembly, and a housing. The feeding assembly includes a feeding handwheel and a feeding screw, and the push plate mechanism includes a push plate handwheel and a push plate screw. The feeding handwheel controls the feeding screw to send the push plate mechanism to the bottom of the pipe. Then, the push plate handwheel controls the push plate screw, driving the transmission gear to rotate the push plate ±90 degrees, pushing the fallen arc plate from the bottom of the pipe to a side that does not affect the lower sealing device. Finally, by calculating different pipe diameters, the lengths of the feeding screw and push plate screw, the length of the push plate arm, and the gear transmission stroke can be designed to ensure that the push plate rotation angle covers arc plates of different sizes.

[0022] The bottom of the housing is equipped with a first flange, which is bolted to a second flange on the top of the sealing manifold. By adapting to sealing manifolds and clamp valves of different sizes, it can be used for removing perforated arc plates in the DN300-DN800 range. The structural design is safe and reliable. By measuring the distance from the bottom flange of the device to the center of the pipe below and marking the feed screw accordingly, the descent position of the pusher mechanism can be precisely controlled. When used in conjunction with existing clamp valves and sealing manifolds, it can achieve the function of removing arc plates.

[0023] The operating procedure for the above-mentioned device is as follows: S1. Define the radius R of the working pipeline and the radius of the arc plate with the pressurized opening; S2. Ensure that the total length L of the push plate and push plate arm is greater than the radius of the arc plate with pressure opening; S3. Rotate the push plate handwheel to make the push plate screw drive the gear along the guide rail through the fixed plate, lifting lug, and transmission shaft. Then, the push plate arm located on the transmission shaft drives the push plate to move to the leftmost side. S4. Rotate the feed handwheel to lower the feed screw to a distance of approximately 2R-Lm from the top of the working pipe; S5. Rotate the push plate handwheel to make the push plate screw drive the gear along the guide rail through the fixed plate, lifting lug, and drive shaft. Then, the push plate arm located on the drive shaft drives the push plate to move to the far right, pushing away the fallen arc plate to achieve the desired purpose.

[0024] The Xinglongtai Gas Transmission Branch Company operates approximately 456 km of natural gas pipelines with diameters ranging from D219 to D820. Operating pressures range from a maximum of 3.0 MPa to a minimum of 0.1 MPa. The pipelines undergo year-round internal inspections and defect point maintenance, and process pipeline modifications are also frequent. Therefore, pressurized opening operations are common. This newly designed and manufactured device can be applied to the maintenance and modification of natural gas pipelines, ensuring smooth operation and improving work efficiency. After its application, the device can avoid secondary opening operations caused by arc plate failure, saving manpower, resources, and material costs, and improving construction efficiency. Taking the opening of a DN800 pipe as an example, including labor, material, machinery, and main material costs, a single operation can save up to 68,000 yuan.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A press-through pierce baffle push-off device characterized by, The device includes a push plate mechanism, a feed assembly, and a housing. The feed assembly includes a feed handwheel and a feed screw. The feed handwheel is fixed to the feed screw, which is disposed through the housing. The push plate mechanism includes a push plate handwheel and a push plate screw. The push plate handwheel is fixed to one end of the push plate screw, which is disposed through the feed screw. The other end of the push plate screw is connected to a push plate via a transmission mechanism. The transmission mechanism includes a fixed plate, a transmission gear, a lifting lug, a transmission shaft, a push plate arm, and a limiting mechanism. The limiting mechanism contains a transmission gear, with push plate arms on both sides of the transmission gear. One end of each push plate arm and the transmission gear are connected to the transmission shaft. A push plate is fixed to the other end of each push plate arm. The transmission shaft has symmetrically arranged lifting lugs extending from both ends. The lifting lugs are mounted on the fixed plate, which is located on the push plate screw. The transmission mechanism also includes a transmission plate, and a limiting mechanism is fixed on the transmission plate, with the transmission plate located below the fixed plate. The limiting mechanism includes a guide rail plate and a limiting post. One end of the guide rail plate and the limiting post are fixed to the transmission plate, and the other end are connected by a connecting plate. A transmission gear is located between the guide rail plate and the limiting post. The guide rail plate is provided with a toothed groove, which meshes with the transmission gear. The operating procedure for the above-mentioned device is as follows: S1. Define the radius R of the working pipeline, and define the radius of the arc plate for the pressurized opening baffle. S2. Ensure that the total length L of the push plate and push plate arm is greater than the radius of the arc plate; S3. Rotate the push plate handwheel to make the push plate screw drive the gear along the guide rail through the fixed plate, lifting lug, and transmission shaft. Then, the push plate arm located on the transmission shaft drives the push plate to move to the leftmost side. S4. Rotate the feed handwheel to lower the feed screw to a distance of 2R-L from the top of the working pipe, in meters; S5. Rotate the push plate handwheel to make the push plate screw drive the gear along the guide rail through the fixed plate, lifting lug, and drive shaft. Then, the push plate arm located on the drive shaft drives the push plate to move to the far right, pushing away the fallen arc plate to achieve the desired purpose.

2. The apparatus of claim 1, wherein: The bottom of the housing is provided with a first flange, which is bolted to a second flange at the top of the sealing manifold. The transmission mechanism and the push plate are located inside the sealing manifold.

3. The apparatus of claim 1, wherein: The feed handwheel is located on the non-flange side of the housing.

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