Front filtering device

Abstract

The utility model relates to a front filtering device, and relates to the technical field of natural gas extraction. The front filtering device comprises a pipe body, a bracket and a filtering basket, the support arranged in the pipe body can provide stable support for the filter basket, so that the state of the filter basket is kept stable in the pipe body, impurities input from the liquid inlet can enter the filter basket, are intercepted by the filter basket and cannot flow out from the liquid outlet, the impurities entering the drain valve are reduced, and the drain valve is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas exploitation, in particular to a pre-filtering device. Background Art

[0002] In the general natural gas production and transportation process, after the natural gas enters the separator, due to the reduced flow rate and gravity separation, the solid and liquid impurities in the gas flow settle in the liquid accumulation bag at the bottom of the separator, and then flow into the steam trap through the drainage pipeline and discharge to the formation water tank. The steam trap uses the floating ball and lever balance principle to automatically discharge the sediment in the natural gas storage tank without other power, and there is no natural gas leakage during the drainage process.

[0003] But at the same time, solid impurities such as fracturing sand will also be carried out of the wellbore with the airflow, and the current desander has a very limited effect. A considerable part of the sand and other solid impurities are deposited in the separator and enter the steam trap during the drainage process, causing the steam trap to malfunction. The cause of the malfunction is that the diameter of the steam trap orifice is small, and solid matter with a larger diameter can easily block the valve orifice or jam the valve core connecting rod, causing the drainage process to not proceed normally, and the liquid and impurities cannot be discharged normally, resulting in liquid accumulation in the separator chamber, thereby reducing the gas-liquid separation efficiency. Utility Model Content

[0004] The utility model provides a pre-filtering device which can filter solid impurities and avoid clogging of the steam trap.

[0005] The utility model provides a pre-filter device, comprising:

[0006] A tube body, wherein the tube body is provided with a liquid inlet and a liquid outlet;

[0007] a bracket, the bracket being arranged inside the tube body; and

[0008] The filter basket has an opening at the bottom thereof and opposite to the liquid inlet, and the top of the bracket is connected to the bottom of the filter basket and supports the filter basket.

[0009] In one embodiment, the filter basket includes a main body and a positioning portion, the opening is arranged on the main body, the positioning portion surrounds the opening, the bracket is connected to the positioning portion, the edges of the opening and the positioning portion are both elliptical, and the edge of the positioning portion is in contact with the inner wall of the tube body.

[0010] In one embodiment, the bracket includes a connecting part and a supporting part, the connecting part is provided with a through hole, the top surface of the connecting part is in contact with the bottom surface of the positioning part, one end of the supporting part is connected to the connecting part, and the other end of the supporting part is arranged on the inner wall of the tube body.

[0011] In one embodiment, the through hole is elliptical in shape, and the area of ​​the through hole is not less than the area of ​​the opening.

[0012] In one embodiment, an annular protrusion is provided on the inner wall of the tube body, and one end of the support portion away from the connecting portion is arranged on the top surface of the annular protrusion.

[0013] In one embodiment, the support portion includes two support plates and a connecting plate, the first ends of the support plates are connected to the connecting portion, and the two ends of the connecting plate are respectively connected to the second end of one of the support plates.

[0014] In one embodiment, the second ends of the two support plates are disposed on the annular protrusion at an interval of 180 degrees.

[0015] In one embodiment, the tube body includes an upper tube and a lower tube that are detachably connected.

[0016] In one embodiment, the filter basket is disposed inside the upper tube, and a sewage outlet is provided at the bottom of the lower tube.

[0017] In one embodiment, the upper tube includes a tube body, a first flange and a second flange, the first flange and the second flange are arranged on both sides of the tube body, the first flange is provided with the liquid inlet, and the second flange is provided with the liquid outlet.

[0018] Compared with the prior art, the advantage of the utility model is that the bracket arranged inside the tube body can provide stable support for the filter basket, so that the filter basket can maintain a stable state inside the tube body, and impurities input from the liquid inlet will enter the filter basket and be intercepted by the filter basket and will no longer flow out from the liquid outlet, thereby reducing the impurities entering the steam trap and avoiding clogging of the steam trap. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0020] Figure 1 It is a three-dimensional view of the pre-filter device in the embodiment of the utility model;

[0021] Figure 2 It is an exploded view of the pre-filter device in the embodiment of the utility model;

[0022] Figure 3 It is a three-dimensional view of the filter basket and the bracket in the embodiment of the utility model;

[0023] Figure 4 It is a top view of the pre-filter device in the embodiment of the utility model;

[0024] Figure 5 yes Figure 4 AA section view.

[0025] Reference numerals:

[0026] 1. Tube body; 11. Upper tube; 111. Tube body; 112. First flange; 113. Second flange; 12. Lower tube; 13. Annular protrusion; 2. Bracket; 21. Connecting part; 22. Supporting part; 221. Supporting plate; 222. Connecting plate; 3. Filter basket; 31. Main body; 32. Positioning part; 100. Liquid inlet; 200. Liquid outlet; 300. Opening; 400. Through hole; 500. Drain outlet; 600. Reserved opening. DETAILED DESCRIPTION

[0027] The utility model will be further described below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 3 As shown, the pre-filter device of one embodiment of the utility model comprises a tube body 1, a bracket 2 and a filter basket 3. Figure 4 As shown, the tube body 1 is provided with a liquid inlet 100 and a liquid outlet 200. The bracket 2 is arranged inside the tube body 1, the opening 300 of the filter basket 3 is located at the bottom thereof and opposite to the liquid inlet 100, and the top of the bracket 2 is connected to the bottom of the filter basket 3 and supports the filter basket 3.

[0029] The bracket 2 arranged inside the tube body 1 can provide stable support for the filter basket 3, so that the filter basket 3 can maintain a stable state inside the tube body 1. Impurities input from the liquid inlet 100 will enter the filter basket 3, and then be intercepted by the filter basket 3 and will no longer flow out from the liquid outlet 200, thereby reducing the impurities entering the steam trap and avoiding clogging of the steam trap.

[0030] like Figure 3 As shown, the filter basket 3 includes a body 31 and a positioning portion 32, an opening 300 is provided on the body 31, the positioning portion 32 surrounds the opening 300, the bracket 2 is connected to the positioning portion 32, the edges of the opening 300 and the positioning portion 32 are both elliptical, and the edge of the positioning portion 32 fits with the inner wall of the tube body 1. In order to make the filter basket 3 play a filtering effect, the filter basket 3 needs to separate the interior of the tube body 1 into two different spaces before and after filtering. Since the cross section obtained by cutting the oblique cylinder is an ellipse, the edge of the positioning portion 32 is set to an ellipse, which can fit completely with the inner wall of the tube body 1, thereby playing an isolation role, so that all liquids and impurities input from the liquid inlet 100 need to be filtered by the filter basket 3. The positioning portion 32 has a large surface area in this shape, which is also convenient for connection with the bracket 2.

[0031] like Figure 3As shown, the bracket 2 includes a connecting portion 21 and a supporting portion 22. The connecting portion 21 is provided with a through hole 400. The top surface of the connecting portion 21 is fitted with the bottom surface of the positioning portion 32. One end of the supporting portion 22 is connected to the connecting portion 21, and the other end of the supporting portion 22 is arranged on the inner wall of the tube body 1. The connecting portion 21 has a large and flat surface, which can be well fitted with the positioning portion 32 to stably support the filter basket 3. The supporting portion 22 is connected to the inner wall of the tube body 1 to keep the bracket 2 stable inside the tube body 1.

[0032] Furthermore, the through hole 400 is elliptical in shape, and the area of ​​the through hole 400 is not less than the area of ​​the opening 300. The through hole 400 prevents the connection portion 21 from shielding the opening 300, so that liquid and impurities can enter the filter basket 3 without hindrance.

[0033] The pipe body 1 includes an upper pipe 11 and a lower pipe 12 which are detachably connected, so that the bracket 2 and the filter basket 3 inside can be easily taken out for replacement or cleaning. Figure 5 As shown, further, the filter basket 3 is arranged inside the upper tube 11, and a drain port 500 is provided at the bottom of the lower tube 12. When a large amount of impurities are accumulated in the tube body 1, they can be discharged through the drain port 500, thereby ensuring that the pre-filter device can continue to work. A reserved port 600 is also provided at the top of the upper tube 11, which can be used to install instruments, sensors or other types of components to achieve specific functions.

[0034] like Figure 2 and Figure 5 As shown, the inner wall of the lower tube 12 is provided with an annular protrusion 13, and one end of the support portion 22 away from the connecting portion 21 is arranged on the top surface of the annular protrusion 13. Since the tube body 1 is arranged vertically, in order to stably fix the bracket 2 inside the tube body 1, it is necessary to provide a stable supporting structure for the support portion 22. The annular protrusion 13 is arranged on the inner wall of the tube body 1 and is annular. Even if the bracket 2 rotates to a certain extent, it can still remain stable, thus having a good supporting effect.

[0035] like Figure 3 As shown, the support portion 22 includes two support plates 221 and a connecting plate 222, the first end of the support plate 221 is connected to the connecting portion 21, and the two ends of the connecting plate 222 are respectively connected to the second end of a support plate 221. The connecting plate 222 can keep the second end of the support plate 221 in a stable state, so that the support portion 22 is not easily deformed, and the distance between the second ends of the two support plates 221 can be kept stable, thereby improving the overall stability of the bracket 2. The structure of the support portion 22 of this structure is also very simple, and the manufacturing cost is low.

[0036] Furthermore, the second ends of the two support plates 221 are arranged on the annular protrusion 13 at an interval of 180 degrees, so that the bracket 2 can stand stably on the annular protrusion 13 without a tendency to tip to either side.

[0037] like Figure 2 and Figure 4 As shown, the upper pipe 11 includes a pipe body 111, a first flange 112 and a second flange 113. The first flange 112 and the second flange 113 are arranged on both sides of the pipe body 111. The first flange 112 is provided with a liquid inlet 100, and the second flange 113 is provided with a liquid outlet 200. By providing the first flange 112 and the second flange 113, the pre-filter device can be conveniently installed on the pipeline. The first flange 112 and the second flange 113 should be arranged at an interval of 180 degrees along the circumference of the pipe body 111, so that the liquid inlet 100 and the liquid outlet 200 are respectively located on both sides of the filter basket 3, so that the filter basket 3 can play the effect of filtering impurities.

[0038] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pre-filter device, characterized in that: include: A tube body, wherein the tube body is provided with a liquid inlet and a liquid outlet; A bracket, the bracket is arranged inside the tube body; as well as The filter basket has an opening at the bottom thereof and opposite to the liquid inlet, and the top of the bracket is connected to the bottom of the filter basket and supports the filter basket.

2. The pre-filter device according to claim 1, characterized in that: The filter basket includes a main body and a positioning portion, the opening is arranged on the main body, the positioning portion surrounds the opening, the bracket is connected to the positioning portion, the edges of the opening and the positioning portion are both elliptical, and the edge of the positioning portion is in contact with the inner wall of the tube body.

3. The pre-filter device according to claim 2, characterized in that: The bracket includes a connecting part and a supporting part, the connecting part is provided with a through hole, the top surface of the connecting part is in contact with the bottom surface of the positioning part, one end of the supporting part is connected to the connecting part, and the other end of the supporting part is arranged on the inner wall of the tube body.

4. The pre-filter device according to claim 3, characterized in that: The through hole is in an elliptical shape, and the area of ​​the through hole is not less than the area of ​​the opening.

5. The pre-filter device according to claim 3, characterized in that: An annular protrusion is disposed on the inner wall of the tube body, and one end of the support portion away from the connecting portion is disposed on the top surface of the annular protrusion.

6. The pre-filter device according to claim 5, characterized in that: The support portion includes two support plates and a connecting plate, the first ends of the support plates are connected to the connecting portion, and the two ends of the connecting plate are respectively connected to the second end of one of the support plates.

7. The pre-filter device according to claim 6, characterized in that: The second ends of the two support plates are arranged on the annular protrusion at an interval of 180 degrees.

8. The pre-filter device according to any one of claims 1 to 7, characterized in that: The tube body comprises an upper tube and a lower tube which are detachably connected.

9. The pre-filter device according to claim 8, characterized in that: The filter basket is arranged inside the upper tube, and a sewage outlet is arranged at the bottom of the lower tube.

10. The pre-filter device according to claim 8, characterized in that: The upper tube includes a tube body, a first flange and a second flange. The first flange and the second flange are arranged on both sides of the tube body. The first flange is provided with the liquid inlet, and the second flange is provided with the liquid outlet.

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