Anti-blocking guide pipe for servo liquid level meter

Abstract

The utility model relates to the field of installation of water-sealed cave depot servo liquid level meters, in particular to an anti-blocking guide pipe for a servo liquid level meter, which comprises a pipe body, the pipe body is provided with a guide cavity for guiding a floater, and the first end of the pipe body is higher than the second end of the pipe body. A plurality of oil discharge grooves communicated with the guide cavity are formed in the side face, close to the second end of the pipe body, of the pipe body, the oil discharge grooves are used for discharging heavy crude oil, and a plurality of vent holes are formed in the side face of the pipe body in the axis direction of the pipe body. Heavy crude oil in the guiding cavity and the oil discharging grooves is cleaned through the cleaning mechanism, the heavy crude oil in the guiding cavity is discharged out of the guiding cavity through the oil discharging grooves, and due to the fact that the vent holes play a role in balancing air pressure inside and outside the pipe body, the liquid level heights inside and outside the pipe body are kept consistent. Light crude oil located on the outer side of the pipe body enters the guide cavity through the vent holes, replacement of the crude oil is completed, and the guide pipe is not blocked.

Description

Technical Field

[0001] The utility model relates to the field of installation of a servo level meter for a water-sealed cavern, in particular to an anti-blocking guide tube for a servo level meter. Background Art

[0002] In the underground water-sealed caverns storing crude oil in China, the level instruments used to measure the oil-water interface are all servo level gauges (servo interface gauges). The servo level gauges usually contain one or more floats, which are connected to the drum assembly in the instrument housing through measuring wires. The drum assemblies are magnetically coupled, and the magnetic coupling difference between the inner magnet wheel and the outer magnet wheel (i.e., the drum) indicates the change in the liquid level (interface). When the liquid level changes, the force on the float also changes. This change causes the coupling difference between the drum and the inner magnet to change. This change is detected and calculated by the microprocessor, and then a control command is issued to the servo motor to adjust the position of the float to keep it consistent with the height of the new liquid level. In this way, the servo level gauge can accurately measure the change in liquid level.

[0003] The existing guide tube for servo level gauges includes a tube body, and a plurality of air vents are equidistantly provided along the axial direction of the tube body for balancing the air pressure inside and outside the tube body. When using a servo level gauge to measure changes in the oil-water interface, a guide tube is usually installed in the water seal cavern to be measured, and the float in the servo level gauge is placed in the guide tube to guide the float.

[0004] As the heavy components (heavy crude oil) in crude oil continue to sink during storage, the crude oil components above the oil-water interface in the guide tube of the servo level gauge become heavier and more viscous. The heavy crude oil deposited in the lower layer will eventually clog the guide tube, causing the float of the servo level gauge to be unable to move upward and lose the function of tracking the oil-water interface. In addition, since the guide tube is easily clogged, the steel wire of the servo level gauge is often broken when the float is pulled up, which increases the maintenance and repair workload of the operator and also increases the cost of replacing the steel wire and float of the servo level gauge. Utility Model Content

[0005] (I) The problem to be solved by the utility model is that the heavy crude oil sinks and settles, causing the guide tube to be blocked and the float to be unable to move upward, and the steel wire is easily broken when the float moves upward, increasing the cost of replacing the steel wire and the float.

[0006] (II) Technical solution

[0007] The utility model provides an anti-blocking guide tube for a servo liquid level meter, comprising a tube body, wherein the tube body has a guide cavity for guiding a float, and a first end of the tube body is higher than a second end thereof;

[0008] The side surface of the tube body near the second end thereof is provided with a plurality of oil drain grooves connected with the guide cavity, and the oil drain grooves are used to drain the heavy crude oil;

[0009] Along the axial direction of the tube body, a plurality of vent holes communicating with the guide cavity are opened on the side of the tube body;

[0010] The plurality of vent holes are all higher than the oil drain groove, and the vent holes are used to balance the air pressure inside and outside the tube body;

[0011] A cleaning mechanism is provided on the outer side of the tube body, and the heavy crude oil in the guide cavity is discharged from the oil drain groove through the cleaning mechanism.

[0012] According to an embodiment of the utility model, the cleaning mechanism includes a second cleaning assembly, and a plurality of first through holes communicating with the guide cavity are opened on the side wall of the tube body along the axial direction of the tube body;

[0013] The second cleaning component is connected to the plurality of first through holes, and the second cleaning component cleans the guide cavity through the plurality of first through holes.

[0014] According to an embodiment of the utility model, the cleaning mechanism further includes a first cleaning component, which is disposed on a side of the oil drain groove close to the first end of the tube body and is used for cleaning a plurality of the oil drain grooves.

[0015] According to an embodiment of the present utility model, the first through holes are provided in a plurality of groups, each group of the first through holes is arranged along the axis direction of the tube body, and the plurality of groups of the first through holes are evenly arranged around the axis of the tube body;

[0016] A plurality of the second cleaning components are provided, and each of the second cleaning components is connected to a group of the first through holes.

[0017] According to one embodiment of the utility model, the second cleaning component includes a second main pipe and a second cleaning pump, the second main pipe is connected to the plurality of first through holes through a plurality of branch pipes, the branch pipes correspond one-to-one to the first through holes, one end of the second main pipe is connected to the water outlet of the second cleaning pump, and the other end thereof is sealed.

[0018] According to an embodiment of the utility model, the first cleaning assembly includes a first cleaning pump and an annular tube sleeved on the tube body, the annular tube is higher than the oil drain groove, the annular tube is connected to a first main tube, and the annular tube is provided with a plurality of first cleaning holes for cleaning the plurality of oil drain grooves;

[0019] One end of the first main pipe away from the annular pipe is connected to the water outlet of the first cleaning pump.

[0020] According to an embodiment of the present utility model, a plurality of first main pipes are provided, and the plurality of first main pipes are arranged around the axis of the pipe body.

[0021] According to an embodiment of the utility model, the annular tube is located between the oil drain groove and the vent hole.

[0022] According to an embodiment of the present invention, one end of the branch pipe close to the axis of the pipe body is lower than the other end thereof.

[0023] According to an embodiment of the utility model, the first end of the tube body is fixedly connected to a first flange, the second end of the tube body is fixedly connected to a second flange, and the second flange is fixed in the water seal cavern through a reference plate.

[0024] Beneficial effects of the utility model:

[0025] The heavy crude oil in the guide cavity and the oil drain groove is cleaned by the cleaning mechanism, and the heavy crude oil in the guide cavity is discharged out of the guide cavity through a plurality of oil drain grooves. Since the air vents balance the air pressure inside and outside the pipe body, the liquid level inside and outside the pipe body is kept consistent. Correspondingly, the light crude oil outside the pipe body enters the guide cavity through the air vents, completing the replacement of the crude oil, so that the guide pipe is not blocked, and further does not affect the upward movement of the float of the servo level gauge, so that it can track the oil-water interface normally. In addition, since the light crude oil and the heavy crude oil are replaced, the guide pipe is not easy to be blocked, and when the servo level gauge lifts the float, it is not easy to break the wire, which reduces the maintenance and repair workload of the operator and also reduces the cost of replacing the wire and float of the servo level gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A first stereoscopic view of a guide tube provided in an embodiment of the utility model;

[0028] Figure 2 A second stereoscopic view of the guide tube provided in the embodiment of the utility model;

[0029] Figure 3 A cross-sectional view of a guide tube provided in an embodiment of the utility model;

[0030] Figure 4A three-dimensional diagram of a tube body, a first flange, a second flange and a reference plate provided in an embodiment of the utility model;

[0031] Figure 5 A three-dimensional diagram of a first cleaning component provided in an embodiment of the utility model;

[0032] Figure 6 A front view of a second cleaning assembly provided by an embodiment of the utility model;

[0033] Figure 7 The embodiment of the utility model provides Figure 3 A magnified view of part A;

[0034] Figure 8 A schematic diagram of the installation of the guide tube provided in the embodiment of the utility model.

[0035] Icons: 1. Pipe body; 101. First through hole; 2. First cleaning assembly; 201. First main pipe; 202. Annular pipe; 203. Cleaning hole; 3. Second cleaning assembly; 301. Second main pipe; 302. Branch pipe; 4. Oil drain tank; 5. Vent; 6. First flange; 7. Second flange; 8. Reference plate; 9. Vertical shaft; 10. Crude oil cave tank; 11. Pump pit. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figure 1-Figure 8 As shown, one embodiment of the utility model provides an anti-clogging guide tube for a servo level gauge, which is used to be installed in a water seal cavern, and includes a tube body 1, the tube body 1 has a guide cavity for guiding a float, and the first end of the tube body 1 is higher than the second end thereof;

[0038] A plurality of oil drain grooves 4 communicating with the guide cavity are provided on the side surface of the pipe body 1 near the second end thereof, and the oil drain grooves 4 are used to drain the heavy crude oil;

[0039] Along the axial direction of the tube body 1, a plurality of vent holes 5 communicating with the guide cavity are opened on the side of the tube body 1. The plurality of vent holes 5 are all higher than the oil drain groove 4. The vent holes 5 are used to balance the air pressure inside and outside the tube body 1.

[0040] A cleaning mechanism is provided on the outer side of the pipe body 1 , and the heavy crude oil in the guide cavity is discharged from the oil drain groove 4 through the cleaning mechanism.

[0041] Specifically, the heavy crude oil in the guide cavity and the oil drain groove 4 is cleaned by the cleaning mechanism, and the heavy crude oil in the guide cavity is discharged from the multiple oil drain grooves 4 to the guide cavity. Since the air vent 5 plays a role in balancing the air pressure inside and outside the pipe body 1 to keep the liquid level inside and outside the pipe body 1 consistent, the light crude oil located on the outside of the pipe body 1 enters the guide cavity through the air vent 5 to complete the replacement of the crude oil, so that the guide tube will not be blocked by the heavy crude oil deposited in the lower layer, and thus will not affect the upward movement of the float of the servo level gauge, so that it can normally track the oil-water interface. In addition, since the light crude oil and the heavy crude oil are replaced, the guide tube is not easy to be blocked, and when the servo level gauge pulls up the float, it is not easy to break the steel wire, which reduces the maintenance and repair workload of the operator and the cost of replacing the steel wire and the float of the servo level gauge.

[0042] In actual working conditions, the staff can regularly replace the crude oil to prevent the guide tube from being blocked, and ensure that the float moves upward normally in the guide tube to track the oil-water interface.

[0043] Among them, the number of the oil drain grooves 4 is 6-10, preferably 8, and they are evenly arranged around the axis of the tube body 1. The 8 oil drain grooves can improve the oil drain efficiency of the oil drain grooves 4 without affecting the strength of the tube body 1.

[0044] The guide cavity is the lumen of the tubular body 1 .

[0045] According to an embodiment of the utility model, the cleaning mechanism includes a second cleaning assembly 3, and a plurality of first through holes 101 communicating with the guide cavity are opened on the side wall of the tube body 1 along the axial direction of the tube body 1;

[0046] The second cleaning assembly 3 is in communication with the plurality of first through holes 101 , and the second cleaning assembly 3 cleans the guide cavity through the plurality of first through holes 101 .

[0047] The multiple first through holes 101 of the second cleaning component 3 can clean the guide cavity connected to the multiple first through holes 101. After the heavy crude oil between the guide cavity and the oil drain groove 4 is cleaned, the multiple oil drain grooves 4 are continuously cleaned, so that the heavy crude oil that is easy to solidify in the guide cavity is flushed out from the oil drain groove 4, and then the liquid level between the outside of the pipe body 1 and the water seal cavern rises. In order to maintain the balance of internal and external pressures, the light crude oil located in the upper layer between the pipe body 1 and the water seal cavern enters the pipe body 1 through the multiple air vents 5, and then the replacement of the heavy crude oil and the light crude oil is completed, which will not affect the upward movement of the float and can track the oil-water interface normally. In addition, when the servo level gauge lifts and pulls the float, it is not easy to break the steel wire, which reduces the maintenance and repair workload of the operator and also reduces the cost of replacing the steel wire and the float of the servo level gauge.

[0048] According to an embodiment of the present invention, the cleaning mechanism further comprises a first cleaning assembly 2 , which is disposed on a side of the oil drain groove 4 close to the first end of the tube body 1 and is used for cleaning a plurality of oil drain grooves 4 .

[0049] By cleaning the multiple oil drain grooves 4 , the multiple oil drain grooves 4 blocked by the heavy crude oil can be cleared first, so that the heavy crude oil in the guide cavity can be flushed out of the guide cavity through the multiple oil drain grooves 4 more smoothly.

[0050] As heavy crude oil continues to sink during storage, the crude oil components above the oil-water interface in the servo level gauge guide tube become heavier and more viscous, and the heavy crude oil deposited in the lower layer will eventually block the guide cavity of the tube body 1 and the oil drain groove 4 in the guide tube.

[0051] In the present embodiment, a plurality of oil drain grooves 4 are cleaned by the first cleaning component 2, and after the heavy crude oil at the groove of the oil drain groove 4 is flushed open, the guide cavity is cleaned by the second cleaning component 3, so that the heavy crude oil deposited in the lower layer of the guide cavity (i.e., the crude oil near the second end of the pipe body 1) can be discharged from the guide cavity through the oil drain groove 4. At this time, the liquid level between the outer side of the pipe body 1 and the water seal cavern rises. Since the plurality of air vents 5 can balance the air pressure inside and outside the pipe body 1, the light crude oil located in the upper layer (i.e., the crude oil near the first end of the pipe body 1) enters the guide cavity through the air vents 5, so that the liquid level inside and outside the pipe body 1 is consistent, and the replacement of crude oil is completed, so that it will not affect the upward movement of the float located in the guide cavity, so that it will not lose the function of tracking the oil-water interface, and it can also make it difficult for the servo level gauge to break the wire when lifting the float, thereby reducing the workload of the operator for maintenance and repair, and also reducing the cost of replacing the wire and float of the servo level gauge.

[0052] According to one embodiment of the utility model, Figure 2 As shown, there are multiple groups of first through holes 101, each group of first through holes 101 is arranged along the axis direction of the tube body 1, and the multiple groups of first through holes 101 are evenly arranged around the axis of the tube body 1;

[0053] A plurality of second cleaning components 3 are provided, and each second cleaning component 3 is connected to a group of first through holes 101 .

[0054] In this embodiment, two second cleaning components 3 can be provided, symmetrically arranged on both sides of the tube body 1, so that the cleaning effect of the heavy crude oil in the cleaning guide cavity is better, the cleaning efficiency is improved, the replacement process of the heavy crude oil and the light crude oil inside the tube body 1 is accelerated, and time is saved.

[0055] According to one embodiment of the utility model, Figure 3 and Figure 6As shown, the second cleaning component 3 includes a second main pipe 301 and a second cleaning pump. The second main pipe 301 is connected to multiple first through holes 101 through multiple branch pipes 302. The branch pipes 302 correspond to the first through holes 101 one by one. One end of the second main pipe 301 is connected to the water outlet of the second cleaning pump, and the other end is sealed.

[0056] The second cleaning pump is turned on, so that the cleaning agent flows through the second main pipe 301 , passes through the plurality of branch pipes 302 , and then passes through the plurality of first through holes 101 to clean the guide cavity.

[0057] Furthermore, one end of the branch pipe 302 close to the axis of the tube body 1 is lower than the other end thereof, and the cleaning agent flowing out of the branch pipe 302 can flush the oil drain groove 4. After the crude oil in the guide cavity is cleaned, the oil drain groove 4 is continued to be cleaned, so that the oil drain groove 4 and the guide cavity can be cleaned through the second cleaning component 3, so that the heavy crude oil can flow out of the tube body 1 through the oil drain groove 4.

[0058] Of course, in this embodiment, the second cleaning component 3 can also be in other forms. For example, the second cleaning component 3 includes a third main pipe and an annular pipe. The annular pipe is connected to the pipe body 1 through a plurality of connecting pipes. The plurality of connecting pipes correspond one to one with the plurality of first through holes 101. The axis of the annular pipe intersects with the axis of the pipe body 1 to form a first angle. The first angle is an acute angle. The plurality of connecting pipes are not on the same horizontal plane. The cleaning agent flows to the connecting pipe through the third main pipe and then cleans the heavy crude oil in the guide cavity. The purpose does not deviate from the design concept of the present invention and therefore should fall within the protection scope of the present invention.

[0059] According to one embodiment of the utility model, Figure 1 and Figure 5 As shown, the first cleaning assembly 2 includes a first cleaning pump and an annular pipe 202 sleeved on the pipe body 1, the annular pipe 202 is higher than the oil drain groove 4, the annular pipe 202 is connected to the first main pipe 201, and the annular pipe 202 is provided with a plurality of first cleaning holes 203 for cleaning the plurality of oil drain grooves 4;

[0060] One end of the first main pipe 201 away from the annular pipe 202 is connected to the water outlet of the first cleaning pump. The annular pipe 202 is located between the oil drain groove 4 and the vent hole 5. Figure 7 As shown, the cleaning hole 203 is arranged toward the oil drain groove 4.

[0061] The first cleaning pump is turned on, and the cleaning agent in the first main pipe 201 flows into the annular pipe 202 , and finally flows out from the multiple cleaning holes 203 opened on the annular pipe 202 to clean the multiple oil drain grooves 4 .

[0062] Preferably, in this embodiment, the plurality of cleaning holes 203 and the plurality of oil drain grooves 4 are arranged in a many-to-one manner (ie, each oil drain groove 4 has a plurality of cleaning holes 203 for corresponding cleaning). Figure 7 As shown, the cleaning agent flowing out of the cleaning hole 203 can directly flow into the oil drain tank 4 for cleaning, so that the cleaning effect is better.

[0063] Furthermore, the diameter of the cleaning hole 203 is 10 mm, and the distance between each two adjacent cleaning holes 203 is 20 mm, so that the cleaning holes 203 can better clean the oil drain groove 4.

[0064] Of course, in this embodiment, the number of the plurality of cleaning holes 203 is set to be twice that of the oil drain grooves 4, and each cleaning hole 203 is set toward the plurality of oil drain grooves 4, so that the cleaning effect is better. Of course, the plurality of cleaning holes 203 can also be set one by one with the oil drain grooves 4.

[0065] Of course, in the embodiment, a plurality of first main pipes 201 are provided, and the plurality of first main pipes 201 are arranged around the axis of the pipe body 1. Preferably, two first main pipes 201 are provided, and are symmetrically arranged on both sides of the pipe body 1, so that the cleaning agent can be better transported into the annular pipe 202. Its purpose does not deviate from the design concept of the utility model, and therefore, it should belong to the protection scope of the utility model.

[0066] Furthermore, since the cavity inside the annular tube 202 is a connected annular cavity, when the two first main tubes 201 simultaneously transport cleaning agent into the annular tube 202, the cleaning agent is easily offset, affecting the speed of the cleaning agent flowing out from the cleaning hole 203. Therefore, two baffles can be fixedly installed in the first main tube 201 to separate the annular cavity into two arc-shaped cavities, one of the first main tubes 201 is connected to the first arc-shaped cavity, and the other first main tube 201 is connected to the other arc-shaped cavity. This will not affect the speed of the cleaning agent flowing out from the cleaning hole 203, and the oil drain groove 4 can be better cleaned.

[0067] Of course, in this embodiment, the first cleaning component 2 can also be in other forms. For example, the first cleaning component 2 includes multiple fourth main pipes, which are arranged around the side of the pipe body 1. The bottom of the fourth main pipe is connected to a cross pipe, and the cross pipe is provided with multiple second through holes for cleaning the oil drain tank 4. Its purpose does not deviate from the design concept of the present utility model, and therefore, it should belong to the protection scope of the present utility model.

[0068] According to an embodiment of the utility model, the first end of the pipe body 1 is fixedly connected to the first flange 6, the second end of the pipe body 1 is fixedly connected to the second flange 7, the second flange 7 is fixed in the water seal cavern through the reference plate 8, and the second flange 7 and the reference plate 8 are both fixed in the water seal cavern. A plurality of holes can be opened on the plate surface of the existing reference plate 8 to improve the efficiency of discharging heavy crude oil.

[0069] Further, such as Figure 8 As shown, the water-sealed cavern is composed of a vertical shaft 9, a crude oil cavern 10 and a pump pit 11 which are interconnected from top to bottom. The reference plate 8 is installed at the bottom of the pump pit 11, and the guide pipe is arranged in the water-sealed cavern. The pipe body 1 is welded from multiple sections of steel pipes, and the steel pipes are made of 304SS stainless steel. Among them, the size of the steel pipe above the ground is changed from DN150 to DN250 through a reducer, the size of the steel pipe in the vertical shaft 9 below the ground is DN250, and the size of the steel pipe in the crude oil cavern 10 below the vertical shaft 9 is changed from DN250 to DN400 through a reducer. The total length of the pipe body 1 is from 0.6 meters above the ground to 0.2 meters above the bottom of the pump pit 11. The installation position and installation method of the pipe body 1 in the guide pipe are prior art and will not be described in detail here.

[0070] In actual working conditions, since the position of the oil-water interface will fluctuate due to the increase or decrease of groundwater, it is necessary to monitor the height of the oil-water interface through a servo level gauge, and set the distance from the oil-water interface to the ground as a first threshold, and the distance from the oil level to the ground as a second threshold, wherein the first threshold and the second threshold are design given values ​​in the project. When the servo level gauge detects that the height from the oil-water interface to the ground is less than the first threshold, an alarm command will be issued, and workers will lower the height of the oil-water interface by extracting excess groundwater. In this embodiment, the distance from the annular pipe 202 to the ground is less than the first threshold, preferably the distance from the annular pipe 202 to the ground is less than the first threshold of 0.1 meters, and at least one vent 5 has a distance from the ground less than the second threshold. At this time, the vent 5 can balance the internal and external air pressures and maintain the consistency of the liquid level height inside and outside the pipe body 1.

[0071] In addition, the distance from each vent hole 5 to the ground is less than the first threshold value. On the same horizontal plane, there are two vent holes 5, which are symmetrically opened on the side of the tube body 1. The vent holes 5 are equidistantly arranged along the axial direction of the tube body 1. The interval between two adjacent vent holes 5 is 0.4 meters. The aperture of the vent hole 5 is set to 25 mm. The height of the oil drain groove 4 is set to between 5-7 meters, preferably 6 meters.

[0072] Specifically, after the pipe body 1, the second cleaning assembly 3 and the first cleaning assembly 2 are installed, the staff can regularly clean the guide cavity and the oil drain groove of the pipe body 1, so that the guide pipe is not easy to be blocked. In actual working conditions, the float of the servo level gauge cannot move upward, but can move downward. In order to prevent the float and the steel wire from being damaged during the cleaning process, before cleaning, the servo level gauge issues an instruction to move its float to the reference plate 8. Secondly, the first cleaning pump is turned on, and the cleaning agent flows along the first main pipe 201 into the annular pipe 202, flows out from the cleaning hole 203, and cleans the oil drain groove 4. The second cleaning pump is turned on again, and the cleaning agent flows along the second main pipe 301 through multiple branch pipes 302 to clean the guide cavity, flushing the heavy crude oil in the guide cavity from the oil drain groove 4, and the light crude oil in the crude oil cave tank 10 enters the guide pipe from the vent 5 on the pipe body 1, thereby completing the replacement of the heavy crude oil and the light crude oil in the pipe body 1. After cleaning for a period of time (preferably 15 minutes), the first cleaning pump and the second cleaning pump are stopped. Finally, the servo level meter issues a command to instruct the float to track the oil-water interface. The above cleaning process can be programmed by the system to achieve a one-button start and stop function to prevent the guide tube from blocking.

[0073] In addition, the height spacing formula of two upper and lower adjacent branch pipes 302 is: h = H / 2;

[0074] The calculation formula for the operating pressure of the cleaning agent is: P = (2 × h) / 100;

[0075] H is the value of the first threshold minus the second threshold (a known value), in m, generally 26 m.

[0076] Wherein h is the height distance between two upper and lower adjacent branch pipes 302, in meters, which is calculated to be 13 meters.

[0077] P is the operating pressure of the cleaning agent, in MPa(G), which is calculated to be 0.26MPa(G).

[0078] It should be noted that the cleaning agent is water with a temperature between 70 and 90 degrees, preferably 80 degrees, to clean the heavy crude oil in the pipe body 1.

[0079] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-clogging guide tube for a servo level gauge, characterized in that: It comprises a tube body (1), the tube body (1) having a guide cavity for guiding a float, and the first end of the tube body (1) is higher than the second end thereof; The side surface of the tube body (1) close to the second end thereof is provided with a plurality of oil drain grooves (4) connected with the guide cavity, and the oil drain grooves (4) are used to drain heavy crude oil; Along the axial direction of the tube body (1), a plurality of vent holes (5) communicating with the guide cavity are provided on the side surface of the tube body (1); The plurality of vent holes (5) are all higher than the oil drain groove (4), and the vent holes (5) are used to balance the air pressure inside and outside the tube body (1); The outer side surface of the tube body (1) is provided with a cleaning mechanism, and the heavy crude oil in the guide cavity is discharged from the oil discharge groove (4) through the cleaning mechanism.

2. The anti-clogging guide tube for a servo level gauge according to claim 1, characterized in that: The cleaning mechanism comprises a second cleaning assembly (3), and a plurality of first through holes (101) communicating with the guide cavity are provided on the side wall of the tube body (1) along the axial direction of the tube body (1); The second cleaning component (3) is in communication with the plurality of the first through holes (101), and the second cleaning component (3) cleans the guide cavity through the plurality of the first through holes (101).

3. The anti-clogging guide tube for a servo level gauge according to claim 1, characterized in that: The cleaning mechanism further comprises a first cleaning component (2), which is arranged on one side of the oil drain groove (4) close to the first end of the tube body (1) and is used for cleaning a plurality of the oil drain grooves (4).

4. The anti-clogging guide tube for a servo level gauge according to claim 2, characterized in that: The first through holes (101) are provided in a plurality of groups, each group of the first through holes (101) is arranged along the axial direction of the tube body (1), and the plurality of groups of the first through holes (101) are evenly arranged around the axis of the tube body (1); A plurality of the second cleaning components (3) are provided, and each of the second cleaning components (3) is connected to a group of the first through holes (101).

5. The anti-clogging guide tube for a servo level gauge according to claim 2, characterized in that: The second cleaning component (3) comprises a second main pipe (301) and a second cleaning pump. The second main pipe (301) is connected to the plurality of first through holes (101) via a plurality of branch pipes (302). The branch pipes (302) correspond to the first through holes (101) one by one. One end of the second main pipe (301) is connected to the water outlet of the second cleaning pump, and the other end is sealed.

6. The anti-clogging guide tube for a servo level gauge according to claim 3, characterized in that: The first cleaning assembly (2) comprises a first cleaning pump and an annular tube (202) sleeved on the tube body (1); the annular tube (202) is higher than the oil drain groove (4); the annular tube (202) is connected to a first main tube (201); and the annular tube (202) is provided with a plurality of first cleaning holes (203) for cleaning the plurality of oil drain grooves (4); One end of the first main pipe (201) away from the annular pipe (202) is connected to the water outlet of the first cleaning pump.

7. The anti-clogging guide tube for a servo level gauge according to claim 6, characterized in that: A plurality of the first main pipes (201) are provided, and the plurality of the first main pipes (201) are arranged around the axis of the pipe body (1).

8. The anti-clogging guide tube for a servo level gauge according to claim 6, characterized in that: The annular tube (202) is located between the oil drain groove (4) and the vent hole (5).

9. The anti-clogging guide tube for a servo level gauge according to claim 5, characterized in that: One end of the branch pipe (302) close to the axis of the pipe body (1) is lower than the other end.

10. The anti-clogging guide tube for a servo level gauge according to claim 1, characterized in that: The first end of the pipe body (1) is fixedly connected to a first flange (6), the second end of the pipe body (1) is fixedly connected to a second flange (7), and the second flange (7) is fixed in the water seal cavern via a reference plate (8).

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