阅读说明：本技术 一种天然气除砂装置及其使用方法 (Natural gas desanding device and using method thereof ) 是由 高友华 于 2020-07-14 设计创作，主要内容包括：本发明公开了一种天然气除砂装置及其使用方法,除砂筒的上端、下端分别连接有密封箱、排砂管,密封箱内部设置有用于储存清洗水的空腔,过滤筒内设置有过滤结构,密封箱与过滤筒之间连接有第三连接管,第三连接管用于将过滤筒中经过滤结构过滤后的清洗水回收至密封箱内的空腔中；本装置在对天然气进行除砂后,可对除砂筒进行清洗,清洗后,通过过滤筒对清洗后的清洗水进行过滤,然后将过滤后的清洗水回收到密封箱中,以便下次循环使用。(The invention discloses a natural gas desanding device and a using method thereof.A sealing box and a sand discharge pipe are respectively connected to the upper end and the lower end of a desanding cylinder, a cavity for storing cleaning water is arranged in the sealing box, a filtering structure is arranged in a filtering cylinder, a third connecting pipe is connected between the sealing box and the filtering cylinder and used for recovering the cleaning water filtered by the filtering structure in the filtering cylinder into the cavity in the sealing box; this device can wash the desanding section of thick bamboo after carrying out the desanding to the natural gas, after the washing, filters the washing water after wasing through the cartridge filter, then retrieves the seal box with the washing water after filtering to next cycle uses.)

1. A natural gas desanding device is characterized by comprising a desanding cylinder (1) and a filter cylinder (11), wherein a desanding structure is arranged inside the desanding cylinder; the upper end and the lower end of the desanding cylinder (1) are respectively connected with a seal box (6) and a sand discharge pipe (5), a cavity for storing cleaning water is arranged in the seal box (6), an air inlet (4) is arranged on the side surface of the desanding cylinder (1), a first connecting pipe (20) is connected between the seal box (6) and the air inlet (4), and the air inlet (4) and the first connecting pipe (20) are respectively connected with a fourth control valve (22) for controlling natural gas to enter the desanding cylinder (1) and a first control valve (21) for controlling cleaning water to enter the desanding cylinder (1) through the air inlet (4);

a filtering structure is arranged in the filtering cylinder (11), a third connecting pipe (19) is connected between the seal box (6) and the filtering cylinder (11), and the third connecting pipe (19) is used for recovering cleaning water filtered by the filtering structure in the filtering cylinder (11) into a cavity in the seal box (6);

the sand discharge pipe (5) comprises an upper port, a first lower port and a second lower port, the upper port of the sand discharge pipe (5) is communicated with the lower end of the sand removing cylinder (1), a second connecting pipe (10) is connected between the first lower port of the sand discharge port (5) and the filter cylinder (11), the second lower port of the sand discharge port (5) is a sand discharge port (8), a second control valve (23) used for controlling cleaning water to enter the filter cylinder (11) is arranged on the second connecting pipe (10), and a third control valve (24) used for controlling sand and stone to be discharged from the sand discharge port (8) is arranged on the sand discharge port (8).

2. The natural gas desanding device according to claim 1, wherein the filtering structure comprises a first filtering screen (13), a second filtering screen (14) and a third filtering screen (15) from top to bottom in sequence, the first filtering screen (13) and the second filtering screen (14) are connected through a connecting rod (16), the second filtering screen (14) and the third filtering screen (15) are connected through a connecting rod (16), the upper end of the first filtering screen is in threaded connection with the lower end of a fourth connecting pipe (17), the upper end of the filtering screen (11) is connected with a sealing cover (18), the sealing cover (18) is in threaded connection with the upper end of the fourth connecting pipe (17), and one end of the third connecting pipe (19) penetrates through the first filtering screen (13), the second filtering screen (14) and the third filtering screen (15) and is located at the inner bottom of the filtering screen (11).

3. A natural gas desanding device according to claim 1 or 2, wherein a placing groove (12) is provided on the inner wall of the filter cartridge (11), one end of the placing groove (12) penetrates the upper end of the filter cartridge (11), and the other end is located on the inner wall of the filter cartridge (11), and the placing groove (12) is used for placing the filter structure.

4. A natural gas desanding device as claimed in claim 2, wherein the end of the second connecting pipe (10) connected to the filter cartridge (11) is located above the first filter screen (13).

5. The natural gas desanding device as claimed in claim 1, wherein the inner wall of the sand discharge pipe (5) is connected with one end of a threaded rod (9), the other end of the threaded rod (9) passes through the upper port and is positioned in the desanding cylinder (1), and the axis of the threaded rod (9) and the axis of the upper port are coincident with each other; the threaded rod (9) is sleeved with the telescopic rod (2) and the rotating plate (3), the rotating plate (3) is in threaded connection with the threaded rod (9), the lower end of the rotating plate (3) is movably connected with the upper end of the telescopic rod (2), and under the telescopic action of the telescopic rod (2), the rotating plate (3) moves up and down on the threaded rod (9) and rotates along the straight line where the threaded rod (9) is located as the axis.

6. A natural gas desanding device as claimed in claim 5, wherein the length of the rotating plate (3) is the same as the inner diameter of the port of the sand discharge pipe (5).

7. The use method of the natural gas desanding device according to any one of claims 1-2 and 4-6, characterized by comprising a desanding step and a cleaning step;

the sand removing step comprises the following steps:

a1: closing the first control valve (21), the second control valve (23) and the third control valve (24), opening the fourth control valve (22), allowing natural gas to enter the desanding cylinder (1) through the gas inlet (4), desanding through a desanding structure in the desanding cylinder (1), and depositing sand and gravel in the bottom of the desanding cylinder (1) and the sand discharge pipe (5);

a2: when sand needs to be discharged, the fourth control valve (22) is closed, the third control valve (24) is opened, and sand is discharged through the sand discharge port (8);

the cleaning step comprises the following steps:

b1: after the sand and stone are discharged, the fourth control valve (22) and the third control valve (24) are closed, the first control valve (21) is opened, and cleaning water enters the sand removing cylinder (1) from the seal box (6) through the air inlet (4) for cleaning;

b2: after cleaning, the first control valve (21) is closed, the second control valve (23) is opened, cleaning water enters the filter cylinder (11) through the filter cylinder (11), and a water suction pump in the third connecting pipe (19) pumps the cleaning water passing through the filter structure into the seal box (6);

b3: after the washing water is sucked into the seal box (6), the second control valve (23) is closed.

8. The use method of the natural gas desanding device is characterized in that a first gravity sensor is arranged in the inner bottom of the sand drain pipe (5) and used for monitoring the weight S of sand deposited in the sand drain pipe (5);

when S is larger than or equal to the threshold value A, the fourth control valve (22) is closed, the third control valve (24) is opened, and sand is discharged through the sand discharge port (8);

when S is smaller than the threshold value A, the fourth control valve (22) is opened, and the third control valve (24) is closed;

9. the use method of the natural gas desanding device is characterized in that a heating layer is further arranged in the desanding cylinder (1); in B3, after the second control valve (23) is closed, the heating layer starts to heat the desanding cylinder (1).

10. The use method of the natural gas desanding device is characterized in that the heating layer is heating wires uniformly distributed in the wall of the desanding cylinder (1).

Technical Field

The invention relates to a desanding cylinder, in particular to a natural gas desanding device and a using method thereof.

Background

Because the natural gas contains silt and the pipeline transmission medium is gas-solid two-phase flow, the inside of the throttle valve is impacted by the gas-solid two-phase flow (particularly sand grains therein) for a long time in the operation process, so that phenomena such as erosion, puncture and the like are easy to occur, and the production safety is seriously influenced. At the orifice, the pressure, velocity and particle flow path change due to the reduced flow area, and thus, the erosion is often a severe part.

Therefore, in the process of transporting and using the natural gas, the natural gas is usually required to be desanded and then transported to a transportation pipeline, so that the use efficiency of the pipeline can be effectively improved. The mode that current desanding section of thick bamboo used spiral separation pipe and gravity separation both to combine together separates natural gas and silt, but after the separation, still have some grit to remain in the desanding section of thick bamboo, under the long-term in service behavior, remaining grit is easily to the desanding device in the desanding section of thick bamboo.

Disclosure of Invention

One object of the present invention is to provide a sand removing device, which can clean the inside of a sand removing cylinder after sand is discharged, further clean sand remained in the sand removing cylinder, prevent sand from remaining, improve the sand removing efficiency of the sand removing device, and prolong the service life of the sand removing device.

Another object of the present invention is to provide a method for using a sand removing cylinder, which can automatically perform a circulating cleaning process on the inside of the sand removing cylinder after sand removal, thereby facilitating a long-term use.

The above purpose is realized by adopting the following technical scheme:

the device comprises a desanding cylinder and a filter cylinder, wherein a desanding structure is arranged inside the desanding cylinder; the upper end and the lower end of the desanding cylinder are respectively connected with a seal box and a desanding pipe, a cavity for storing cleaning water is arranged in the seal box, an air inlet is arranged on the side surface of the desanding cylinder, a first connecting pipe is connected between the seal box and the air inlet, and the air inlet and the first connecting pipe are respectively connected with a fourth control valve for controlling natural gas to enter the desanding cylinder and a first control valve for controlling the cleaning water to enter the air inlet;

a filter structure is arranged in the filter cartridge, a third connecting pipe is connected between the seal box and the filter cartridge, and the third connecting pipe is used for recovering cleaning water filtered by the filter structure in the filter cartridge into a cavity in the seal box;

the sand discharge pipe comprises an upper port, a first lower port and a second lower port, the upper port of the sand discharge pipe is communicated with the lower end of the sand removal cylinder, a second connecting pipe is connected between the first lower port of the sand discharge port and the lower end of the filter cylinder, the second lower port of the sand discharge port is the sand discharge port, a second control valve used for controlling cleaning water to enter the filter cylinder is arranged on the second connecting pipe, and a third control valve used for controlling sand and stone to be discharged from the sand discharge port is arranged on the sand discharge port.

Further, this device can wash the desanding section of thick bamboo inside after the desanding, and then can wash remaining grit in the desanding section of thick bamboo effectively, prevents that the grit from remaining in the desanding section of thick bamboo for a long time, causes the damage to the desanding section of thick bamboo, influences long-term the use.

The washing water after this device washs, gets into the cartridge filter through the sand discharge pipe in, then filters in the cartridge filter, filters unnecessary grit to the below of cartridge filter, and the washing water after the filtration is under the effect of the suction pump in the third connecting pipe, is pumped in the seal box, stores.

Therefore, the device can recover and recycle the cleaning water after cleaning, thereby effectively improving the use efficiency.

Meanwhile, the sand discharge pipe of the device is a pipeline with three openings, the lower end of the sand discharge pipe is sealed, the upper end is an upper end port, the side face of the lower end of the sand discharge pipe is provided with a first lower port and a second lower port respectively, the first lower port is connected with the lower end of the filter cylinder through a second connecting pipe, the second lower port is used for discharging sand, and the sand enters the sand discharge pipe through the upper end port of the sand discharge pipe when the sand separated from natural gas is deposited on the inner bottom of the sand removal cylinder because the upper end of the sand discharge pipe reaches the inner bottom of the sand discharge pipe and has a certain distance and length in the vertical direction.

Secondly, the bottom in the sand discharge pipe of the device is connected with one end of a threaded rod, and the other end of the threaded rod is positioned in a sand removal cylinder; the threaded rod is sleeved with a telescopic rod and a rotating plate, the rotating plate is in threaded connection with the threaded rod, the lower end of the rotating plate is movably connected with the upper end of the telescopic rod, and under the telescopic action of the telescopic rod, the rotating plate moves up and down on the threaded rod and rotates along the straight line where the threaded rod is located as the axis. The length of the rotating plate is the same as the inner diameter of the upper port of the sand discharge pipe.

The one end of threaded rod and the interior bottom fixed connection of sand discharge pipe, the lower extreme of telescopic link and the interior bottom of sand discharge pipe are connected, because the telescopic link suit is on the threaded rod, and the rotor plate passes through threaded connection with the threaded rod, the upper end of telescopic link is connected with the lower extreme of rotor plate, the rotor plate can rotate on the telescopic link, therefore, when the telescopic link reciprocates in threaded rod place direction, the upper end of telescopic link drives the rotor plate and reciprocates, because the rotor plate passes through threaded connection with the threaded rod, the threaded rod is fixed motionless, consequently, when the telescopic link drives the rotor plate and reciprocates, the rotor plate can reciprocate and rotate on the threaded rod.

The rotating plate rotates in the process of moving up and down, deposited gravel can be buffered, the deposited gravel is prevented from being bonded, and the efficiency of discharging the gravel from the discharge pipe is influenced.

Simultaneously, the rotor plate can drive the grit fast and get into the sand discharge pipe at the in-process that reciprocates, improves grit exhaust efficiency.

Further, the filtration from the top down includes first filter screen in proper order, second filter screen and third filter screen, connect through the connecting rod between first filter screen and the second filter screen, connect through the connecting rod between second filter screen and the third filter screen, the upper end of first filter screen and the lower extreme threaded connection of fourth connecting pipe, the upper end of cartridge filter is connected with sealed lid, the upper end threaded connection of sealed lid and fourth connecting pipe, first filter screen is passed to the one end of third connecting pipe, second filter screen and third filter screen are located the interior bottom of cartridge filter.

Filtration comprises a whole, filtration includes first filter screen, the second filter screen, the third filter screen, connecting rod and fourth connecting pipe, first filter screen, the second filter screen, the third filter screen sets gradually through from the top down, multiplicable filter effect to wasing water, wash water from the first filter screen in getting into the cartridge filter, then through first filter screen, the second filter screen, the third filter screen successive layer filters, the suction pump that washs in the water through the third connecting pipe after the filtration takes out in the seal box and retrieves.

According to the filter structure of the device, the connecting rod is used for being connected between the first filter screen and the second filter screen and between the second filter screen and the third filter screen, the fourth connecting pipe is used for being connected between the sealing cover and the first filter screen, when the filter structure needs to be taken out, the sealing cover can be directly taken down from the filter cartridge, after the sealing cover is taken down, the fourth connecting pipe moves along with the sealing cover, the fourth connecting pipe drives the first filter screen to be taken out, the first filter screen drives the second filter screen and the third filter screen to be taken out together under the driving of the connecting rod, therefore, when the structure is used, the whole filter cartridge does not need to be taken down, the filter cartridge is disassembled, the filter structure is taken out, the filter structure can be taken down from the filter cartridge together directly through taking down the filter cover, the operation; and, because the one end that third connecting rod and cartridge filter are connected is in the top of first filter screen, therefore the grit after filtering remains on the filter screen, the washing water after the filtration is taken out from the lower extreme of cartridge filter by the third connecting pipe, consequently to this structure, when taking out the filtration, can directly take out the grit after the filtration together, need not additionally clear up the grit in the cartridge filter, simultaneously, because the lower extreme of third connecting pipe is at the interior bottom of cartridge filter, consequently when using, can take out all washing water after the filtration from the cartridge filter, improve recovery efficiency.

Meanwhile, when the filter structure is placed in the filter cartridge, the placing groove is formed in the inner wall of the filter cartridge, one end of the placing groove penetrates through the upper end of the filter cartridge, and the other end of the placing groove is located on the inner wall of the filter cartridge.

The use method of the natural gas desanding device comprises a desanding step and a cleaning step;

the sand removing step comprises the following steps:

a1: the first control valve, the second control valve and the third control valve are closed, the fourth control valve is opened, natural gas enters the desanding cylinder through the gas inlet, desanding is carried out through a desanding structure in the desanding cylinder, and sand and stones after desanding are deposited at the bottom in the desanding cylinder and in the sand discharge pipe;

a2: when sand needs to be discharged, the fourth control valve is closed, the third control valve is opened, and sand is discharged through the sand discharge port; meanwhile, the telescopic rod is telescopic on the threaded rod;

the cleaning step comprises the following steps:

b1: after the sand and stone are discharged, the fourth control valve and the third control valve are closed, the first control valve is opened, and cleaning water enters the sand removing cylinder from the sealed box through the air inlet for cleaning;

b2: after cleaning, the first control valve is closed, the second control valve is opened, cleaning water enters the filter cylinder through the filter cylinder, and the cleaning water passing through the filter structure is pumped into the seal box by the water suction pump in the third connecting pipe; meanwhile, the telescopic rod is telescopic on the threaded rod;

b3: after the cleaning water is pumped into the seal box, the second control valve is closed.

A first gravity sensor is arranged in the inner bottom of the sand discharge pipe and used for monitoring the weight S of sand and stone deposited in the sand discharge pipe;

when S is larger than or equal to the threshold value A, the fourth control valve is closed, the third control valve is opened, and sand and stone are discharged through the sand discharge port;

when S is smaller than the threshold A, the fourth control valve is opened, and the third control valve is closed;

furthermore, a heating layer is also arranged in the sand removing cylinder; in B3, after the second control valve is closed, the heating layer starts to heat the desanding cylinder. The heating layer is heating wires which are uniformly distributed in the wall of the sand removing cylinder.

The washing water of this device is water pure water, and after finishing washing, the heater strip circular telegram that sets up in the sand removal section of thick bamboo heats, and the heat of heater strip heating is transmitted through the inner wall of sand removal section of thick bamboo, and then heats the inside of sand removal section of thick bamboo, removes the unnecessary moisture in the sand removal section of thick bamboo.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the invention relates to a natural gas desanding device and a using method thereof.

Meanwhile, the cleaned cleaning water can be filtered, then the filtered cleaning water is obtained, and then the filtered cleaning water is recovered and stored in a sealed box for further use next time.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic view of the present apparatus;

FIG. 2 is a schematic view of a filter arrangement;

FIG. 3 is a schematic view of the device when the telescopic rod is shortened;

FIG. 4 is a schematic structural view of the device when the telescopic rod is extended; .

Reference numbers and corresponding part names in the drawings:

1-a sand removing cylinder, 2-a telescopic rod, 3-a rotating plate, 4-an air inlet, 5-a sand discharging pipe, 6-a sealing box, 7-an air outlet, 8-a sand discharging port, 9-a threaded rod, 10-a second connecting pipe, 11-a filter cylinder, 12-a placing groove, 13-a first filter screen, 14-a second filter screen, 15-a third filter screen, 16-a connecting rod, 17-a fourth connecting pipe, 18-a sealing cover, 19-a third connecting pipe, 20-a first connecting pipe, 21-a first control valve, 22-a fourth control valve, 23-a second control valve, 24-a third control valve, 25-a gravity separating cylinder and 26-a helical blade.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.

[ example 1 ]

As shown in fig. 1, the device comprises a desanding cylinder 1 with a desanding structure arranged inside and a filter cylinder 11; the upper end and the lower end of the desanding cylinder 1 are respectively connected with a seal box 6 and a sand discharge pipe 5, a cavity for storing cleaning water is arranged in the seal box 6, an air inlet 4 is arranged on the side surface of the desanding cylinder 1, a first connecting pipe 20 is connected between the seal box 6 and the air inlet 4, and a fourth control valve 22 and a first control valve 21 are respectively connected to the air inlet 4 and the first connecting pipe 20 and used for controlling natural gas to enter the desanding cylinder 1 and controlling cleaning water to enter the air inlet 4;

a filter structure is arranged in the filter cartridge 11, a third connecting pipe 19 is connected between the seal box 6 and the filter cartridge 11, and the third connecting pipe 19 is used for recovering cleaning water filtered by the filter structure in the filter cartridge 11 into a cavity in the seal box 6;

the sand discharge pipe 5 comprises an upper port, a first lower port and a second lower port, the upper port of the sand discharge pipe 5 is communicated with the lower end of the sand removing cylinder 1, a second connecting pipe 10 is connected between the first lower port of the sand discharge port 5 and the lower end of the filter cylinder 11, the second lower port of the sand discharge port 5 is a sand discharge port 8, a second control valve 23 used for controlling cleaning water to enter the filter cylinder 11 is arranged on the second connecting pipe 10, and a third control valve 24 used for controlling sand and stone to be discharged from the sand discharge port 8 is arranged on the sand discharge port 8.

In this implementation, the desanding structure includes the gravity separation cylinder 25 that is open from top to bottom that sets up in the desanding cylinder, and the lateral surface of gravity separation cylinder is provided with helical blade 26, and helical blade's the outside contacts with the inner wall of desanding cylinder, and air inlet 4 is located between two adjacent blades of helical blade. An air outlet 7 is arranged in the seal box 6, and the air outlet 7 is communicated with an upper end outlet of the gravity separation cylinder 25.

When the device is used, the first control valve, the second control valve and the third control valve are closed, the fourth control valve is opened, the sand-containing natural gas enters the desanding cylinder through the air inlet, the sand-containing natural gas is on the outer wall of the gravity separation cylinder, the inner wall of the desanding cylinder and the spiral channel formed between the outer side faces of the spiral blades are subjected to rotary desanding, the natural gas subjected to desanding for the first time enters the desanding cylinder through the lower end of the gravity separation cylinder, a small amount of sand is contained in the natural gas subjected to desanding for the first time, the natural gas moves from bottom to top in the gravity separation cylinder, further, under the action of gravity, the natural gas is subjected to desanding for the second time, the natural gas subjected to desanding for the second time is discharged into the air outlet from the upper end of the gravity separation cylinder and is discharged out of the air outlet, and the sand falls.

The grit of separation gets into in the sand discharge mouth, piles up in the sand discharge mouth, when needs discharge grit, closes the fourth control valve, and the third control valve is opened, and the grit passes through the third control valve and discharges through the sand discharge mouth.

After the sand and stone are discharged, the third control valve is closed, the first control valve and the second control valve are further opened, in the embodiment, the cleaning water is water, the cleaning water enters the sand removing cylinder from the seal box through the first connecting pipe and the air inlet, the cleaning water rotates in a spiral channel formed among the outer wall of the gravity separation cylinder, the inner wall of the sand removing cylinder and the outer side surface of the spiral blade, then under the gravity of the spiral, the sand and stone existing in a gap between the spiral blade and the outer wall of the gravity separation cylinder are washed, after the washing, the sand and stone existing in the sand removing cylinder are driven to the sand discharging pipe and enter the filter cylinder through the second connecting pipe, the cleaning water containing the sand is filtered through the filter device in the filter cylinder, the filtered cleaning water is positioned at the lower end of the filter device, and because the third connecting pipe is also positioned at the inner bottom of the filter cylinder, the cleaning water pumped through the third connecting pipe is the filtered cleaning water, the washing water after filtering can be conveniently and fast drawn back to the sealing box, and the recycling and washing efficiency can be further improved.

[ example 2 ]

On the basis of embodiment 1, the filter structure includes first filter screen 13, second filter screen 14 and third filter screen 15 from top to bottom in proper order, as shown in fig. 2, first filter screen 13 and second filter screen 14 are connected through connecting rod 16, second filter screen 14 and third filter screen 15 are connected through connecting rod 16, the upper end of first filter screen is in threaded connection with the lower end of fourth connecting pipe 17, the upper end of filter cartridge 11 is connected with sealing cover 18, sealing cover 18 is in threaded connection with the upper end of fourth connecting pipe 17, one end of third connecting pipe 19 passes through first filter screen 13, second filter screen 14 and third filter screen 15 and is located the interior bottom of filter cartridge 11. A placing groove 12 is arranged on the inner wall of the filter cartridge 11, one end of the placing groove 12 penetrates through the upper end of the filter cartridge 11, the other end of the placing groove 12 is located on the inner wall of the filter cartridge 11, and the placing groove 12 is used for placing a filter structure.

In this embodiment, one end of the second connection pipe 10 connected to the filter cartridge 11 is located above the first filter screen 13, so that the washing water flows into the filter cartridge from above the first filter screen, the washing water is filtered layer by layer through the first filter screen, the second filter screen and the third filter screen, the filtered washing water is located at the inner bottom of the filter cartridge, and the lower end of the third connection pipe is also located below the third filter screen, so that when the third connection pipe pumps water, the pumped water is the filtered washing water, and meanwhile, after the washing water is pumped, the filtered gravel is left above the first filter screen. Consequently when clearing up the cartridge filter, can at first separate third connecting pipe and cartridge filter, after the separation, take off sealed lid from the top of cartridge filter, after taking off, sealed lid is taken off together with fourth connecting pipe 17, first filter screen 13, second filter screen 14 and third filter screen 15 from the cartridge filter, take off the back simultaneously, the grit that filters out is under the effect of first filter screen, discharge from the cartridge filter simultaneously, do not need extra award cartridge filter to take off, the grit discharges in handstand, it is more convenient to use.

Simultaneously, this device is when sealed lid is covered on the cartridge filter, and sealed lid and fourth connecting rod support first filter screen, second filter screen and third filter screen, and consequently the filtration can not take place to remove when the filtration is in the cartridge filter, can fix it effectively, the long-term use of being more convenient for.

[ example 3 ]

On the basis of the embodiment 1, the inner bottom of the sand discharge pipe 5 of the device is connected with one end of a threaded rod 9, and the other end of the threaded rod 9 is positioned in the sand removal cylinder 1; the threaded rod 9 is sleeved with the telescopic rod 2 and the rotating plate 3, the rotating plate 3 is in threaded connection with the threaded rod 9, the lower end of the rotating plate 3 is movably connected with the upper end of the telescopic rod 2, and under the telescopic action of the telescopic rod 2, the rotating plate 3 moves up and down on the threaded rod 9 and rotates along the straight line where the threaded rod 9 is located as the axis. The length of the rotating plate 3 is the same as the inner diameter of the upper port of the sand discharge pipe 5. When the telescopic rod is shortened to the shortest, the structure is shown in figure 3; when the telescopic rod is extended to the longest, the structure is shown in figure 4.

In the embodiment, the sand discharge pipe is of a T-shaped structure, the axes of the first lower port and the second lower port of the sand discharge port are positioned on the same horizontal straight line, the axis of the upper port of the sand discharge pipe 5 is vertical to the axes of the first lower port and the second lower port, the threaded rod 9 is vertically connected to the inner bottom of the sand discharge pipe, the straight line of the threaded rod is superposed with the axis of the upper port of the sand discharge pipe 5, when the sand is discharged or the cleaning water is discharged, the telescopic rod stretches up and down on the threaded rod, the upper end of the telescopic rod can push the rotating plate to move up and down on the threaded rod in the moving process, because the threaded rod is fixed and the rotating plate is connected with the threaded rod through the threads, in the process of up-and-down expansion of the telescopic rod, the threaded rod rotates by taking the straight line where the threaded rod is positioned as the axis in the process of moving up and down, in the process of sand discharge and water discharge, the rotating plate which moves up and down and rotates can accelerate the efficiency of sand discharge and water discharge.

Simultaneously at the in-process of arranging the sand, the rotor plate can be patted the grit, makes it not hard up, prevents that accumulational grit from bonding, improves the availability factor.

In this embodiment, the telescopic rod is an existing electric push rod, and the electric push rod is a hollow structure.

[ example 4 ]

A use method of a natural gas desanding device is characterized in that a first gravity sensor is arranged in the inner bottom of a sand discharge pipe 5 and used for monitoring the weight S of sand and stone deposited in the sand discharge pipe 5; a heating layer is also arranged in the sand removing cylinder 1; the using method comprises the steps of sand removal and cleaning;

the sand removing step comprises the following steps:

a1: the first control valve 21, the second control valve 23 and the third control valve 24 are closed, the fourth control valve 22 is opened, natural gas enters the desanding cylinder 1 through the gas inlet 4, and sand and stones subjected to desanding and desanding through a desanding structure in the desanding cylinder 1 are deposited at the bottom in the desanding cylinder 1 and in the sand discharge pipe 5;

a2: when S is larger than or equal to the threshold value A, the fourth control valve 22 is closed, the third control valve 24 is opened, gravels are discharged through the sand discharge port 8, and the telescopic rod 2 stretches on the threaded rod 9;

when S is smaller than the threshold A, the fourth control valve 22 is opened, and the first control valve 21, the second control valve 23 and the third control valve 24 are closed;

the cleaning step comprises the following steps:

b1: after the sand and stone are discharged, the fourth control valve 22 and the third control valve 24 are closed, the second control valve 23 and the first control valve 21 are opened, and the cleaning water enters the sand removing cylinder 1 from the seal box 6 through the air inlet 4 for cleaning;

b2: after cleaning, the first control valve 21 is closed, cleaning water enters the filter cartridge 11 through the filter cartridge 11, and the water pump in the third connecting pipe 19 pumps the cleaning water passing through the filter structure into the seal box 6; meanwhile, the telescopic rod 2 extends and retracts on the threaded rod 9;

b3: after the washing water is pumped into the seal box 6, the second control valve 23 is closed. After the second control valve 23 is closed, the heating layer starts to heat the desanding cylinder 1. The heating layer is heating wires which are uniformly distributed in the wall of the sand removing barrel 1.

The size of the threshold value A is set according to the sizes of the sand removing cylinder and the sand discharging pipe 5 in the embodiment.

[ example 5 ]

On the basis of embodiment 4, this embodiment includes the following steps:

c1: the controller controls the first control valve 21, the second control valve 23 and the third control valve 24 to be closed, the fourth control valve 22 is opened, natural gas enters the desanding cylinder 1 through the gas inlet 4, and sand and stones subjected to desanding and desanding through a desanding structure in the desanding cylinder 1 are deposited at the bottom in the desanding cylinder 1 and in the sand discharge pipe 5;

c2: when S is larger than or equal to 30kg, the first gravity sensor sends a signal to the controller, the controller controls the fourth control valve 22 to be closed, the third control valve 24 to be opened, gravel is discharged through the sand discharge port 8, meanwhile, the controller sends a signal to the motor, and the motor controls the telescopic rod 2 to stretch and retract on the threaded rod 9;

when S is less than 30kg, the first gravity sensor sends a signal to the controller, the controller controls the fourth control valve 22 to be opened, and the first control valve 21, the second control valve 23 and the third control valve 24 are closed;

c3: when the controller controls the fourth control valve 22 to be closed, the third control valve 24 to be opened, sand is discharged through the sand discharge port 8, and a pressure signal on the first gravity sensor is 0, the first gravity sensor sends a gravity signal to the controller, the controller controls the fourth control valve 22 and the third control valve 24 to be closed, the controller opens the second control valve 23 and the first control valve 21, and cleaning water enters the sand removing cylinder 1 from the seal box 6 through the air inlet 4 for cleaning;

the second gravity sensor is arranged in the sealed box, when the second gravity sensor receives a pressure signal in the sealed box, the pressure signal is 0, namely all cleaning water in the sealed box is discharged from the second gravity sensor, the second gravity sensor sends the signal to the controller, the controller controls the first control valve 21 to be closed, the water suction pump in the third connecting pipe 19 starts to work, the water suction pump sucks the cleaning water into the sealed box again, when the pressure signal received by the second gravity sensor in the sealed box is original weight, the second gravity sensor sends the signal to the controller, the controller controls the second control valve 23 to be closed, meanwhile, the controller controls the heating wire in the heating layer to be connected with the power supply, the heating layer starts to be heated, and after the heating is carried out for 5min, the controller controls the heating layer to stop heating. The C1 step is restarted.

The term "connected" used herein may be either directly connected or indirectly connected via other components without being particularly described.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.