Dredging device for communicating pipeline of liquid level meter of vacuum heating furnace

Abstract

The invention relates to the technical field of oil field surface engineering, in particular to a vacuum heating furnace liquid level meter communicating pipeline dredging device. The problems that an existing heating furnace liquid level meter communication pipeline needs to be dredged, operation is complex, and the dredging success rate is low are mainly solved. The vacuum heating furnace liquid level meter communicating pipeline dredging device comprises a shell (7), a piston (6) is arranged in the shell (7), a push handle (9) is fixed to one end of the piston (6), the other end of the piston (6) is movably connected with a dredging rod (3), a spiral groove (10) is formed in the outer surface of the dredging rod (3), a guide screw (2) is connected to the side wall of the front end of the shell (7), and the end of the guide screw (2) is located in the spiral groove (10). The dredging device for the communicating pipeline of the liquid level meter of the vacuum heating furnace adopts combination of impact and vibration for descaling, so that the dredging success rate is improved, the furnace does not need to be shut down for draining water in the operation process, and the operation is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the oilfield ground engineering technical field, specifically to a kind of vacuum heating furnace liquid level gauge communication pipeline dredging device. BACKGROUND

[0002] In the industrial production process of oil field, the medium in vacuum heating furnace is clear water, containing calcium, silicon, magnesium and other ions, and after heating, scaling phenomenon is easy to appear, and the heating furnace body and liquid level gauge communication pipeline are blocked, the medium liquid level in the furnace body cannot be transmitted to the liquid level gauge through the communication pipeline, the medium stored in the liquid level gauge cannot be fed back in real time with the medium liquid level in the heating furnace, so that the liquid level gauge displays the liquid level before the blockage, and the real-time display function of the liquid level gauge fails.

[0003] The existing dredging operation needs to stop the vacuum heating furnace, cool down, drain the clear water in the furnace body, lower the liquid level to the communication pipeline below the liquid level gauge, disassemble the liquid level gauge, open the ball valve above the communication pipeline to avoid the fluid in the furnace body from being sprayed out and causing the operator to be scalded, and then use a screwdriver, a thin steel bar and other tools to manually impact and dredge the inside, push the scale in the communication pipeline into the heating furnace body, and complete the dredging of the communication pipeline. In the dredging process, the furnace needs to be stopped and drained, the preparation time is long, the operation is complex, and the work efficiency is low.

[0004] Currently, the scale remover uses a threaded drill bit to rotate to remove the scale, but when the scale is accumulated seriously, the drill bit is difficult to drill, and the success rate of dredging cannot be guaranteed. SUMMARY

[0005] In order to overcome the deficiencies of the existing heating furnace liquid level gauge communication pipeline dredging, which needs to stop the furnace, is complex to operate and has a low success rate of dredging, the present application provides a vacuum heating furnace liquid level gauge communication pipeline dredging device, which uses impact and vibration to remove scale, improves the success rate of dredging, and does not need to stop the furnace and drain water during operation, which is simple to operate.

[0006] The technical scheme of the present application is: a vacuum heating furnace liquid level gauge communication pipeline dredging device, comprising a shell, a piston is arranged inside the shell, one end of the piston is fixed with a push handle, the other end of the piston is movably connected with a dredging rod, a helical groove is arranged on the outer surface of the dredging rod, and the end of a guide screw is located in the helical groove.

[0007] The piston is threadedly connected with a fixed sleeve at one end of the dredging rod, the end of the dredging rod is provided with a protruding connecting cap, the outer diameter of the connecting cap is greater than the inner diameter of the fixed sleeve, the dredging rod passes through the inside of the fixed sleeve, and the connecting cap is axially located between the fixed sleeve and the piston.

[0008] The inner diameter of the fixed sleeve is larger than the outer diameter of the dredging rod, the inner diameter of the piston is larger than the outer diameter of the connecting cap, and the axial length of the connecting cap is smaller than the distance between the end surface of the fixed sleeve and the inner step of the piston.

[0009] A sealing ring is arranged between the outer surface of the piston and the inner wall of the shell.

[0010] The rear end of the shell is threadedly connected with a plug, and the push handle is connected with the piston after penetrating through the plug.

[0011] The cross section of the push handle is square, and square holes matched with the square cross section of the push handle are formed in the piston and the plug.

[0012] The front end of the shell is externally provided with a connecting thread for being connected with a liquid level meter communication pipeline.

[0013] The two guide screws are threadedly connected with the shell, and the axial distance of the two guide screws is the same as the pitch of the helical groove.

[0014] The front end of the dredging rod is conical.

[0015] The outer surface of the plug is hexagonal, and a section of the outer surface of the shell is hexagonal.

[0016] The dredging device is connected with a ball valve on the communication pipeline of the vacuum heating furnace through the connecting thread, the shell is provided with a sealing ring, and the sealing ring can withstand a pressure of 1 MPa, while the operating pressure of the vacuum heating furnace is lower than 0.3 MPa, so that the sealing performance can be ensured, the medium in the heating furnace is prevented from leaking, and the operation is safe. The original packing seal is changed into a piston sealing ring seal, the static sealing mode is changed into a dynamic sealing mode, the packing wear is reduced, the sealing performance is improved, the frequency of tool maintenance and packing replacement is reduced, the sealing ring is convenient to replace, and maintenance is facilitated. During the dredging process, the push handle is repeatedly pushed and pulled, the dredging rod rotates and moves forward and backward at the same time, gradually penetrates through the inside of the ball valve, and extends to the communication pipeline to rotate and scrape the scale attached to the pipe wall. The dredging rod can realize rapid straight reciprocating rotary motion, the existing single rotary mode for removing scale is changed into a combination of impact and vibration, impact breaking and extrusion descaling are realized, and scale breaking can be accelerated. In the practical process, the dredging device is applied 106 times on site, and the dredging success rate is 100%. The dredging device can be independently operated by one person to complete the dredging work, the dredging can be performed without stopping the furnace and draining water, the pre-preparation time after blockage is shortened by 6 hours, water replenishment and re-warming of the furnace body after dredging are not needed, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the present application; Figure 2 is a left view of the present application; Figure 3 It is along Figure 1 Sectional view of AA; Figure 4 This is an external view of the present invention.

[0018] In the diagram, 1-connecting thread, 2-guide screw, 3-draining rod, 4-fixing sleeve, 5-sealing ring, 6-piston, 7-outer shell, 8-plug, 9-push handle, 10-spiral groove, 11-connecting cap, 12-tightening nut. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "inner," "outer," "front," and "back" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the components referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Depend on Figures 1 to 4 As shown, a device for unblocking a liquid level gauge connecting pipeline in a vacuum heating furnace includes a housing 7. The outer surface of the front end of the housing 7 has a connecting thread 1 for connecting the device to the internal thread of a ball valve in the liquid level gauge connecting pipeline. Inside the housing 7 is a piston 6 with a sealing groove machined on its outer surface. A sealing ring 5 is installed within the sealing groove, located between the outer wall of the piston 6 and the inner wall of the housing 7. At least two sealing rings 5 ​​are provided to ensure a seal between the piston 6 and the housing 7 during reciprocating motion. The sealing rings 5 ​​must be replaced promptly after wear. A plug 8 is threaded to the rear end of the housing 7. A push handle 9 is fixed to the rear end of the piston 6. The push handle 9 passes through the plug 8 and has a handle fixed to its end for easy hand gripping and operation. The push handle 9 has a square cross-section. Both the piston 6 and the plug 8 have square holes that match the square cross-section of the push handle 9. The piston 6 and the push handle 9 are welded and fixed so that they can move together. The size of the square hole on the plug 8 is slightly larger than the square cross-section of the push handle 9, that is, there is a gap between them, so that the push handle 9 can move freely left and right in the plug 8 but cannot rotate.

[0022] The front end of the piston 6 is connected with the dredging rod 3, and the piston 6 and the dredging rod 3 are movably connected, so that they can rotate relatively while moving left and right together. The outer surface of the dredging rod 3 is provided with a spiral groove 10, forming a spiral rod, the front end of the dredging rod 3 penetrates through the shell 7, and the front end of the dredging rod 3 is conical, forming a spiral drill bit. The front end of the shell 7 is connected with a guide screw 2, and the end of the guide screw 2 penetrates through the side wall of the shell and is located in the spiral groove 10, so that when the dredging rod 3 is subjected to an axial external force, it can convert linear reciprocating motion into rotary motion under the limitation of the guide screw 2, so that the dredging rod 3 rotates while moving transversely. As a preferred, the guide screw 2 is two, which are connected on the shell 7 by threads, and the axial distance of the two guide screws 2 is the same as the pitch of the spiral groove 10, and they are separated by 180 degrees in the radial direction, and the two guide screws limit the dredging rod 3 together, ensuring that the dredging rod 3 runs more smoothly.

[0023] In order to ensure that the piston 6 and the dredging rod 3 can rotate relatively while moving left and right together, the following connecting structure can be used: the inner wall of the piston 6 is provided with a protruding step, the push handle 9 is located to the right of the step, and the dredging rod 3 is located to the left of the step. The end of the piston 6 located at one end of the dredging rod 3 is fixed by a threaded connection fixing sleeve 4, and the fixing sleeve 4 is sleeved outside the dredging rod 3. The end of the dredging rod 3 close to the piston 6 is provided with a protruding connecting cap 11, the dredging rod 3 penetrates through the inside of the fixing sleeve 4, so that the connecting cap 11 is axially located between the fixing sleeve 4 and the step of the piston 6, and the outer diameter of the connecting cap 11 is greater than the inner diameter of the fixing sleeve 4, so that the fixing sleeve 4 and the piston 6 limit the axial displacement of the connecting cap 11 together, so that the dredging rod 3 moves left and right together with the piston 6. In order to ensure that the dredging rod 3 can rotate freely in the fixing sleeve 4, the inner diameter of the fixing sleeve 4 is greater than the outer diameter of the dredging rod 3, the inner diameter of the piston 6 is greater than the outer diameter of the connecting cap 11, and the axial length of the connecting cap 11 is less than the distance between the right end surface of the fixing sleeve 4 and the inner step of the piston 6, so that the dredging rod 3 and the connecting cap 11 can rotate while moving left and right. At the same time, the end of the connecting cap 11 can be processed into a round corner to avoid knocking between the piston 6 and the connecting cap 11 when rotating, so that it rotates more flexibly.

[0024] The above description is only one of the connecting methods between the piston 6 and the dredging rod 3, and other connecting methods can also be used, the purpose is to make the piston 6 move left and right together with the dredging rod 3, and the dredging rod 3 can also rotate relative to the piston 6.

[0025] For the convenience of loading and unloading, a section of the outer surface of the shell 7 can be processed into a hexagon to form a hexagonal nut, i.e. the tightening nut 12, so that when the dredging device is connected to the liquid level meter communication pipeline, the tightening nut 12 can be twisted with a wrench. At the same time, the outer surface of the plug 8 is also processed into a hexagon, which is consistent in size with the tightening nut 12, so that the plug 8 and the tightening nut 12 can use the same wrench, which is convenient for management. When the sealing ring 5 needs to be replaced, the plug 8 is removed with a wrench, and the push handle 9 and the piston 6 are taken out, and after the sealing ring is replaced, it can be installed again.

[0026] When the vacuum heating furnace liquid level meter communication pipe is blocked, the shell 7 is connected to the ball valve inner thread of the communication pipeline through the connecting thread 1, and since there is a sealing ring 5 between the shell 7 and the piston 6, the sealing can be guaranteed, and leakage of the medium in the heating furnace can be avoided. Push the push handle 9 forward, the push handle 9 drives the piston 6 and the dredging rod 3 to move forward, and at the same time, the dredging rod 3 converts linear motion into rotary motion under the restriction of the guide screw 2, and breaks and falls the scale in the pipeline through the drill bit at the front end. By repeatedly pushing and pulling the push handle 9, the dredging rod 3 rotates while moving forward and backward, gradually passes through the inside of the ball valve, extends to the communication pipeline, and performs rotary scraping on the scale attached to the pipe wall. Since the dredging rod 3 advances forward while rotating and is restricted by the pitch of the spiral groove, an impact vibration is formed, which can accelerate the breaking of the scale.

[0027] The dredging device is connected with the ball valve on the communication pipeline of the vacuum heating furnace, the inside of the device is a sealed structure, is resistant to temperature and pressure, and can be operated independently by one person to complete the dredging work. The original packing seal packing is changed to a piston sealing ring seal, the static seal is changed to a dynamic seal, the packing wear is reduced, the sealing performance is improved, the tool maintenance and packing replacement frequency is reduced, and the sealing ring is convenient to replace and maintain. The device can dredge without stopping the furnace and draining water, shortens the preparation time of 6 hours after the blockage, does not need to replenish water and reheat the furnace body after dredging, and improves the work efficiency. The dredging rod can perform rapid linear reciprocating rotary motion, realizes impact breaking and extrusion descaling, and in the practice process, the on-site application is 106 times, and the dredging success rate is 100%. The device adopts a piston and O-shaped sealing ring sealing method, and can withstand 1 MPa pressure, while the operating pressure of the vacuum heating furnace is lower than 0.3 MPa, so the sealing performance and operation safety can be guaranteed.

[0028] The above has described the embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical applications or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A vacuum heating furnace liquid level gauge communication line unblocking device comprising a housing (7), characterized in that: The shell (7) is internally provided with a piston (6), one end of the piston (6) is fixed with a push handle (9), the other end is movably connected with a dredging rod (3), the outer surface of the dredging rod (3) is provided with a spiral groove (10), the front end side wall of the shell (7) is connected with a guide screw (2), and the end of the guide screw (2) is located in the spiral groove (10).

2. The vacuum heating furnace level gauge communication line unblocking device according to claim 1, characterized by: The piston (6) is threadedly connected with a fixing sleeve (4) at one end of the dredging rod (3), the end of the dredging rod (3) is provided with a protruding connecting cap (11), the outer diameter of the connecting cap (11) is greater than the inner diameter of the fixing sleeve (4), the dredging rod (3) passes through the inside of the fixing sleeve (4) and the connecting cap (11) is axially located between the fixing sleeve (4) and the piston (6).

3. The vacuum heating furnace level gauge communication line unblocking device according to claim 2, characterized by: The inner diameter of the fixing sleeve (4) is greater than the outer diameter of the dredging rod (3), the inner diameter of the piston (6) is greater than the outer diameter of the connecting cap (11), and the axial length of the connecting cap (11) is less than the distance between the end face of the fixing sleeve (4) and the inner step of the piston (6).

4. The vacuum heating furnace level gauge communication line unblocking device according to claim 3, characterized by: The outer surface of the piston (6) is provided with a sealing ring (5) between the inner wall of the shell (7).

5. The vacuum heating furnace level gauge communication line unblocking device according to claim 4, characterized by: The rear end of the shell (7) is threadedly connected with a plug (8), the push handle (9) passes through the plug and is connected with the piston (6).

6. The vacuum heating furnace level gauge communication line unblocking device according to claim 5, characterized by: The push handle (9) is square in cross section, square holes corresponding to the square cross section of the push handle (9) are formed in the piston (6) and the plug (8).

7. The vacuum heating furnace level gauge communication line purging apparatus according to claim 6, characterized by: The front end of the shell (7) is provided with a connecting thread (1) on the outer surface, which is used for connecting the inner thread of the ball valve of the liquid level meter communication pipeline.

8. The vacuum heating furnace level gauge communication line purging apparatus according to claim 7, characterized by: The guide screw (2) is provided with two, which are threadedly connected on the shell (7), and the axial distance of the two guide screws (2) is the same as the pitch of the spiral groove (10).

9. The vacuum heating furnace level gauge communication line purging apparatus according to claim 8, characterized by: The front end of the dredging rod (3) is conical.

10. The vacuum heating furnace level gauge communication line purging apparatus according to claim 9, characterized by: The outer surface of the plug (8) is hexagonal, and a section of the outer surface of the shell (7) is hexagonal.

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