CN114054487A

CN114054487A - Gas phase extraction comprehensive equipment structure for soil pollution treatment

Info

Publication number: CN114054487A
Application number: CN202111381286.9A
Authority: CN
Inventors: 邹义龙; 黄学平
Original assignee: Nanchang Institute of Technology
Current assignee: Nanchang Institute of Technology
Priority date: 2021-11-20
Filing date: 2021-11-20
Publication date: 2022-02-18
Anticipated expiration: 2041-11-20
Also published as: CN116159851A; CN114054487B

Abstract

The invention discloses a gas phase extraction comprehensive equipment structure for soil pollution treatment, which comprises a first vehicle body and a second vehicle body, wherein a first support is fixedly arranged on the upper side surface of the first vehicle body, a vent pipe is fixedly arranged on the upper side surface of the first vehicle body, an air compressor is fixedly arranged on the first vehicle body, air injection seats are uniformly arranged on the vent pipe, air columns are inserted on the air injection seats in a sliding manner, and a driving mechanism and an exhaust mechanism are arranged on the first support. The working efficiency is high.

Description

Gas phase extraction comprehensive equipment structure for soil pollution treatment

Technical Field

The invention relates to the technical field of vapor extraction, in particular to a vapor extraction comprehensive equipment structure for soil pollution treatment.

Background

In some places where raw materials of heavy-pollution factories are stacked, such as raw material storage tank areas of chemical factories, fertilizer plants and the like, since a part of organic pollutants can permeate into soil when the heavy-pollution chemical raw materials are stacked for a long time, if the areas are to be developed and used again, the soil in the polluted areas needs to be repaired to be developed and used; the common soil remediation technologies at present include a vapor extraction technology, a stabilization/solidification technology, a thermal desorption technology, a chemical oxidation technology, a leaching technology, a microbial remediation technology, a plant remediation technology and the like, wherein the vapor extraction technology has the advantages of low treatment cost, high operability, high treatment efficiency and the like, and is widely applied to the treatment of volatile organic compound contaminated soil;

in the application process of the gas phase extraction technology, the gas columns are generally fixedly installed at all positions of a field uniformly, polluted soil is repaired at one time, great workload is brought to daily operation and management of the whole set of device, particularly in some large repair fields, although the polluted soil can be repaired, the installation and the disassembly of the gas columns are particularly difficult, the gas columns enter another repair field from one repair field, time and labor are wasted, damage is easily caused, and extraction gas is not well shielded, so that the extraction gas is scattered around, secondary pollution is caused, and therefore a gas phase extraction comprehensive equipment structure for soil pollution treatment is provided.

Disclosure of Invention

The invention aims to provide a gas-phase extraction comprehensive equipment structure for soil pollution treatment, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a vapor extraction comprehensive equipment structure for soil pollution administers, includes portable first automobile body and the second automobile body that pollutes the soil upper surface, fixed mounting has first support on the last side of first automobile body, fixed mounting has the breather pipe on the last side of first automobile body, fixed mounting has the air compressor who is used for to the gas of blowing in to the breather pipe on the first automobile body, evenly be provided with the gas injection seat on the breather pipe, the slip grafting has the gas column on the gas injection seat, the lower extreme of gas column is for inserting the connection with polluting soil, the installation of first support has the actuating mechanism that is arranged in driving the gas column to reciprocate and installs the exhaust mechanism who will pollute the gas of in the soil and collect the purification, be equipped with on the second automobile body and be used for burying the membrane device in the soil with degradable plastic film embedding.

Preferably, the driving mechanism comprises a first screw, the first screw is rotatably connected to the first support through a first motor, the first screw is in meshed and sleeved with a lifting plate, a second motor is fixedly mounted on the side wall of the lifting plate, and an output shaft of the second motor is connected with the upper end of the air column.

Preferably, the upper end fixedly connected with of gas post is used for the apron of the sealed seat of aerifing of activity, it has the through-hole to be used for realizing communicating the seat of aerifing with the gas post to open between gas post and the apron, even a plurality of ventholes have been seted up on the lateral wall of gas post.

Preferably, the outer side wall of the gas column is provided with a helical blade, so that the gas column can be drilled into the polluted soil conveniently.

Preferably, exhaust mechanism includes the slip frame of sliding connection on first support lateral wall, it is connected with the second screw rod to rotate through the third motor on the lateral wall of first support, the lateral wall meshing of slip frame cup joints on the second screw rod, evenly rotate on the lateral wall of slip frame and be connected with a plurality of fossil fragments, be equipped with the first matte that is used for hiding the contaminated soil upside between the adjacent fossil fragments, the downside that is located the fossil fragments in first support four corners rotates and is connected with the stiffener, the lower extreme of stiffener rotates and connects on the lateral wall of first support, fixed mounting has gas treatment device on the upper flank of first support, last breathing pipe and the blast pipe of being equipped with of gas treatment device, the inside that inserts first support, gas treatment device is equipped with the aspiration pump with the junction of blast pipe.

Preferably, the four sides of first support fixedly connected with wind respectively, wind includes two fixing bases, is equipped with the winding axle between two fixing bases, the junction of winding axle and fixing base is connected through the spring, the epaxial winding of winding has the second matte, the outer end fixed connection of second matte is on the lateral wall of sliding frame.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the lifting plate slides downwards through the driving mechanism, and the air column is driven to rotate through the second motor, so that the air column can be automatically inserted into the polluted soil, and after the air column is inserted into the polluted soil, the air column, the air injection seat and the vent pipe are communicated, so that the air compressor can inject air into the polluted soil through the air column, the air injection seat and the vent pipe, so that the installation and operation of the air column are more convenient, and the working efficiency is high;

2. according to the invention, the plastic film can be buried in the polluted soil through the film burying device on the second vehicle body, so that the polluted soil is divided into a plurality of small-area unit blocks through the plastic film, and the first shielding cloth and the second shielding cloth are opened through the keel and the sliding frame, so that the first shielding cloth and the second shielding cloth shield the upper side of the polluted soil, thus the polluted gas can be shielded, the extraction gas is gathered into the first shielding cloth and the second shielding cloth, and the extraction gas is purified and filtered through the gas treatment device, so that secondary pollution is avoided.

Drawings

FIG. 1 is a schematic diagram I of the overall structure of the present invention;

FIG. 2 is a schematic diagram II of the overall structure of the present invention;

FIG. 3 is a schematic structural view I of the first vehicle body, the first frame, the first fabric and the second fabric according to the present invention;

FIG. 4 is a schematic structural view II of the first vehicle body, the first frame, the first fabric and the second fabric according to the present invention;

FIG. 5 is a schematic structural view of a first vehicle body, a first bracket, a sliding frame, a second screw and a second cover according to the present invention;

FIG. 6 is a schematic structural view of the first vehicle body, the first bracket, the air column and the lifting plate according to the present invention;

FIG. 7 is a schematic structural view of the vent pipe, the air compressor, the lifting plate, the gas injection seat and the gas column of the present invention;

FIG. 8 is a cross-sectional view of the vent tube, air compressor, lifter plate, air injection seat and air column of the present invention;

FIG. 9 is a cross-sectional view of the vent tube, the gas injection seat and the gas column of the present invention;

FIG. 10 is an exploded view of the sliding frame, the fixing base, the spring and the second cover according to the present invention;

FIG. 11 is a schematic view of the structure of the second body, the second support, the saw blade and the fifth motor of the present invention;

FIG. 12 is a schematic view of the structure of the second vehicle body, the second frame, the plastic film and the saw blade according to the present invention;

FIG. 13 is a schematic view of the structure of the second holder, the plastic film, the base, the sealing cover and the saw blade according to the present invention;

fig. 14 is a sectional view at the mounting box of the present invention.

In the figure: 1. contaminated soil, 2, a first vehicle body, 3, a first bracket, 4, a vent pipe, 5, an air compressor, 501, an air inlet pipe, 6, an air injection seat, 7, an air column, 701, a cover plate, 702, a through hole, 8, a driving mechanism, 801, a first screw rod, 802, a first motor, 803, a lifting plate, 804, a second motor, 9, an exhaust mechanism, 901, a sliding frame, 902, a third motor, 903, a second screw rod, 904, a keel, 905, a first shielding cloth, 906, a reinforcing rod, 907, a gas processing device, 908, an air suction pipe, 909, an exhaust pipe, 9010, an air suction pump, 10, a winding device, 1001, a fixed seat, 1002, a winding shaft, 1003, a spring, 11, a second shielding cloth, 12, a second vehicle body, 13, a plastic film, 14, a film embedding device, 1401, a second bracket, a third screw rod, 1403, a fourth motor, 1402, a base, 1405, 1404, 1406, a fifth motor, 1407. mounting box 1408, sealing cover 1409, press bolt 15 and pricking rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-14, the present invention provides a technical solution: a vapor extraction comprehensive equipment structure for soil pollution treatment comprises a first vehicle body 2 and a second vehicle body 12 which are movable on the upper surface of polluted soil 1, wherein a first support 3 is fixedly arranged on the upper side surface of the first vehicle body 2, a vent pipe 4 is fixedly arranged on the upper side surface of the first vehicle body 2, an air compressor 5 for blowing gas into the vent pipe 4 is fixedly arranged on the first vehicle body 2, an air inlet pipe 501 is arranged on the air compressor 5, the air outlet end of the air compressor 5 is connected with the vent pipe 4, after the air compressor 5 is started, the air compressor 5 sucks the outside gas through the air inlet pipe 501 and inputs the outside gas into the interior of the vent pipe 4, an air injection seat 6 is uniformly arranged on the vent pipe 4, an air column 7 is inserted and connected on the air injection seat 6 in a sliding manner, the lower end of the air column 7 is connected with the polluted soil 1 in an inserting manner, install on the first support 3 and be arranged in driving mechanism 8 that drive gas column 7 reciprocated and install and collect the exhaust mechanism 9 who purifies with the combustion gas in the contaminated soil 1, be equipped with on the second automobile body 12 and be arranged in burying membrane device 14 with degradable plastic film 13 embedding contaminated soil 1 in, realize cutting apart into the cell block of a plurality of little areas contaminated soil 1 through plastic film 13.

As shown in fig. 1 and 11-13, in order to insert the plastic film 13 into the contaminated soil 1 so as to divide the contaminated soil 1 into a plurality of small-area unit blocks for treating the contaminated soil 1 in batches, the membrane burying device 14 includes a second support 1401, a third screw 1402 is rotatably connected to the inside of the second support 1401, the third screw 1402 is driven to rotate by a fourth motor 1403, a base 1404 is engaged and sleeved on the third screw 1402, a fourth motor 1403 is fixedly mounted on a side wall of the second support 1401, an output shaft of the fourth motor 1403 is connected to an upper end of the third screw 1402, when the fourth motor 1403 is started, the output shaft of the fourth motor 1403 drives the third screw 1402 to rotate, when the third screw 1402 rotates, the base 1404 moves upwards or downwards, a saw blade 1405 for cutting the contaminated soil 1 is rotatably connected to a lower end of the base 1404, the saw blade 1405 is driven to rotate by a fifth motor 1406, the fifth motor 1406 is fixedly installed on the side wall of the base 1404, the output shaft of the fifth motor 1406 is connected with the rotating shaft of the saw blade 1405, when the fifth motor 1406 is started, the output shaft of the fifth motor 1406 drives the saw blade 1405 to rotate, a mounting box 1407 for placing a reel of the plastic film 13 is fixedly connected on the rear side wall of the base 1404, a sealing cover 1408 is rotatably connected on the rear side wall of the mounting box 1407, the outer end of the plastic film 13 is drawn out from one side of the sealing cover 1408, as shown in fig. 14, a pressing bolt 1409 is engaged and connected on the mounting box 1407, the lower end of the pressing bolt 1409 is hollow and is matched with the central roller of the plastic film 13, and the plastic film 13 can be installed and removed by rotating the pressing bolt 1409;

as shown in fig. 1, a first vehicle body 2 is placed on contaminated soil 1, then a second vehicle body 12 is moved to the contaminated soil 1, a fourth motor 1403 is started, a driving base 1404 slides downwards after a third screw 1402 rotates, a fifth motor 1406 is started, a saw blade 1405 is driven to rotate by the fifth motor 1406, and the contaminated soil 1 is sawed by the saw blade 1405 by moving the second vehicle body 12, meanwhile, a plastic film 13 inside a mounting box 1407 is unfolded into a sawed groove along with the movement of the second vehicle body 12, so that the contaminated soil 1 at the first vehicle body 2 is separated by the plastic film 13 (the plastic film 13 is unfolded and laid in the groove, and can be degraded in the soil without being taken out), and meanwhile, in order to smoothly unfold the plastic film 13, a pricking rod 15 is wound at the outer end of the plastic film 13, and the pricking rod 15 can fix the outer end of the plastic film 13, then the lower end of the pricking pin 15 is inserted into the contaminated soil 1, so that the end of the plastic film 13 can be fixed, and the plastic film 13 can be smoothly unfolded after the plastic film 13 moves along with the second vehicle body 12.

As shown in fig. 5, in order to drive the air column 7 to slide up and down, so that the air column 7 is inserted into the contaminated soil 1 or pulled out from the contaminated soil 1, specifically, the driving mechanism 8 includes a first screw 801, the first screw 801 is rotatably connected to the first bracket 3 through a first motor 802, a lifting plate 803 is engaged and sleeved on the first screw 801, guide rods are slidably sleeved at four corners of the lifting plate 803, the guide rods can ensure that the lifting plate 803 can slide up and down stably, a second motor 804 is fixedly installed on a side wall of the lifting plate 803, an output shaft of the second motor 804 is connected with an upper end of the air column 7, the second motor 804 is fixedly installed on a side wall of the lifting plate 803, an output shaft of the second motor 804 is fixedly connected with an upper end of the air column 7, and when the second motor 804 is started, the second motor 804 drives the air column 7 to rotate.

As shown in fig. 8-9, in order to inject gas into the contaminated soil 1, specifically, a cover plate 701 for movably sealing the gas injection seat 6 is fixedly connected to an upper end of the gas column 7, as shown in fig. 9, a sealing ring is disposed on an upper side surface of the gas injection seat 6, when the cover plate 701 covers the gas injection seat 6, the sealing ring seals a joint between the cover plate 701 and the gas injection seat 6, so as to prevent gas leakage at the joint between the cover plate 701 and the gas injection seat 6, a through hole 702 is formed between the gas column 7 and the cover plate 701 to communicate the gas injection seat 6 with the gas column 7, and a plurality of gas outlet holes are uniformly formed in a side wall of the gas column 7;

after the gas column 7 is inserted into the contaminated soil 1 (as shown in fig. 9, when the gas column 7 slides downward to the lowest state), the cover plate 701 covers the upper end of the gas injection seat 6, so that the gas inside the vent pipe 4 enters the gas injection seat 6, the gas enters the gas column 7 through the through hole 702, the gas entering the gas column 7 enters the contaminated soil 1 through the gas outlet, and when the gas flows through the contaminated soil 1, the gas is desorbed and carries volatile and semi-volatile organic pollutants in the soil pores, and the volatile and semi-volatile organic pollutants are carried away by the gas, thereby achieving the purpose of treating and purifying the soil.

As shown in fig. 7, in order to facilitate the gas column 7 to be drilled into the contaminated soil 1, specifically, the outer side wall of the gas column 7 is provided with a helical blade to facilitate the gas column 7 to be drilled into the contaminated soil 1.

As shown in fig. 2-3, in order to cover the upper side of the contaminated soil 1 and prevent the gas extracted from the contaminated soil 1 from flowing away from the upper side, specifically, the exhaust mechanism 9 includes a sliding frame 901 slidably connected to the side wall of the first bracket 3, the side wall of the first bracket 3 is rotatably connected to a second screw 903 through a third motor 902, the third motor 902 is fixedly installed on the side wall of the first bracket 3, an output shaft of the third motor 902 is connected to one end of the second screw 903, when the third motor 902 is started, the output shaft of the third motor 902 drives the second screw 903 to rotate, the side wall of the sliding frame 901 is engaged and sleeved on the second screw 903, the side wall of the sliding frame 901 is uniformly rotatably connected to a plurality of keels 904, a first covering cloth 905 for covering the upper side of the contaminated soil 1 is arranged between adjacent keels 904, and the first covering cloth 905 can be folded and unfolded along with the keels 904, after the first shielding cloth 905 is covered on the polluted soil 1, the gas pumped from the polluted soil 1 is concentrated under the first shielding cloth 905 to avoid the pumped gas from floating around, the lower sides of keels 904 at four corners of the first support 3 are rotatably connected with reinforcing rods 906, the lower ends of the reinforcing rods 906 are rotatably connected to the side walls of the first support 3, the reinforcing rods 906 support the keels 904, so that the keels 904 can better support the first shielding cloth 905, a gas treatment device 907 is fixedly installed on the upper side surface of the first support 3, a gas suction pipe 908 and an exhaust pipe 909 are arranged on the gas treatment device 907, the gas suction pipe 908 is inserted into the first support 3, a suction pump 9010 is arranged at the connection position of the gas treatment device and the exhaust pipe 909, activated carbon can be filled in the gas treatment device 907, and after the suction pump 9010 is started, the air suction pipe 908 is used for sucking the gas extracted from the contaminated soil 1 into the gas treatment device 907, adsorbing the harmful organic matters in the gas through the activated carbon, then discharging the treated gas into the air (or collecting the treated gas through external equipment) from the air suction pump 9010, and replacing the activated carbon in the gas treatment device 907 according to the actual use condition to ensure that the treated gas reaches the emission standard.

As shown in fig. 5 and 10, in order to further shield the upper side of the contaminated soil 1, specifically, four sides of the first bracket 3 are respectively and fixedly connected with a winding device 10, the winding device 10 includes two fixing seats 1001, a winding shaft 1002 is disposed between the two fixing seats 1001, a connection part between the winding shaft 1002 and the fixing seat 1001 is connected through a spring 1003, one end of the spring 1003 is fixedly connected to a side wall of the fixing seat 1001, the other end of the spring 1003 is fixedly connected to a side wall of the winding shaft 1002, a second shielding cloth 11 is wound on the winding shaft 1002, and an outer end of the second shielding cloth 11 is fixedly connected to a side wall of the sliding frame 901;

when the slide frame 901 is positioned at the uppermost side of the first carriage 3, as shown in fig. 4, the second mask 11 is completely wound on the winding shaft 1002, when the sliding frame 901 is slid downward, the sliding frame 901 pulls the end of the second canvas 11, causing the second canvas 11 to spread, and then covers the side of the first frame 3 (as shown in fig. 5), when the sliding frame 901 is slid to the lowermost side of the first bracket 3, the second tarpaulin 11 is completely unfolded (as shown in fig. 3), thus, the side surface of the first bracket 3 can be covered, so that the extracted gas is gathered in the first shielding cloth 905 and the second shielding cloth 11, the extracted gas is prevented from floating around, and when the second mask 11 is unfolded, the take-up spring 1003 is twisted after the winding shaft 1002 is rotated, when the sliding frame 901 is slid upward, the winding shaft 1002 is rotated in the reverse direction by the torsion of the spring 1003, and the second sheet 11 is wound up.

The working principle is as follows: in use, the first vehicle body 2 and the second vehicle body 12 are placed on the contaminated soil 1, then the fourth motor 1403 is started to enable the driving base 1404 to slide downwards after the third screw rod 1402 rotates, the fifth motor 1406 is started to enable the fifth motor 1406 to drive the saw blade 1405 to rotate, the saw blade 1405 is enabled to be inserted downwards into the contaminated soil 1, then the second vehicle body 12 is moved to enable the saw blade 1405 to saw away the contaminated soil 1, meanwhile, the plastic film 13 in the mounting box 1407 is unfolded into the sawed groove along with the movement of the second vehicle body 12, so that the contaminated soil 1 at the first vehicle body 2 is separated through the plastic film 13 (as shown in fig. 1), then the air column 7 is inserted into the contaminated soil 1 through the driving mechanism 8, in addition, the third motor 902 is started to enable the second screw rod 903 to rotate, the sliding frame 901 is driven to slide downwards, and the first shielding cloth 905 and the second shielding cloth 11 are enabled to be unfolded (as shown in fig. 2) to shield the upper side face of the contaminated soil 1 After the air compressor 5 is started, the air compressor 5 injects the gas into the contaminated soil 1, the gas entering the contaminated soil 1 can be desorbed and entrain volatile and semi-volatile organic pollutants in the pores of the contaminated soil 1, the volatile and semi-volatile organic pollutants are carried away by the gas into the first shielding cloth 905 and the second shielding cloth 11, the gas in the first shielding cloth 905 and the second shielding cloth 11 is sucked into the gas treatment device 907 through the gas suction pipe 908 by starting the air suction pump 9010, and the gas is treated by the gas treatment device 907 and then discharged through the gas discharge pipe 909, so that the purpose of treating and purifying the soil is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A vapor extraction comprehensive equipment structure for soil pollution treatment comprises a first vehicle body (2) and a second vehicle body (12) which can move on the upper surface of polluted soil (1), and is characterized in that: a first bracket (3) is fixedly arranged on the upper side surface of the first vehicle body (2), a vent pipe (4) is fixedly arranged on the upper side surface of the first vehicle body (2), an air compressor (5) for blowing air into the vent pipe (4) is fixedly arranged on the first vehicle body (2), the air injection seat (6) is uniformly arranged on the air pipe (4), the air injection seat (6) is slidably inserted with an air column (7), the lower end of the gas column (7) is connected with the polluted soil (1) in an inserting way, the first bracket (3) is provided with a driving mechanism (8) for driving the air column (7) to move up and down and an exhaust mechanism (9) for collecting and purifying the gas exhausted from the polluted soil (1), and a film embedding device (14) for embedding the degradable plastic film (13) into the polluted soil (1) is arranged on the second vehicle body (12).

2. The structure of the vapor extraction complex equipment for soil pollution abatement of claim 1, wherein: the driving mechanism (8) comprises a first screw (801), the first screw (801) is rotatably connected to the first support (3) through a first motor (802), a lifting plate (803) is sleeved on the first screw (801) in a meshed mode, a second motor (804) is fixedly mounted on the side wall of the lifting plate (803), and an output shaft of the second motor (804) is connected with the upper end of the air column (7).

3. The structure of the vapor extraction complex equipment for soil pollution abatement as claimed in claim 2, wherein: the upper end fixedly connected with of gas column (7) is used for apron (701) of activity seal gas injection seat (6), it has through-hole (702) to be used for realizing communicating gas injection seat (6) and gas column (7) to open between gas column (7) and apron (701), a plurality of ventholes have evenly been seted up on the lateral wall of gas column (7).

4. The structure of the gas phase extraction complex equipment for soil pollution abatement according to claim 2 or 3, wherein: the outer side wall of the air column (7) is provided with a helical blade.

5. The structure of the vapor extraction complex equipment for soil pollution abatement of claim 1, wherein: the exhaust mechanism (9) comprises a sliding frame (901) which is connected to the side wall of a first support (3) in a sliding mode, a second screw rod (903) is connected to the side wall of the first support (3) in a rotating mode through a third motor (902), the side wall of the sliding frame (901) is meshed and sleeved on the second screw rod (903), a plurality of keels (904) are uniformly connected to the side wall of the sliding frame (901) in a rotating mode, a first shielding cloth (905) used for shielding the upper side of polluted soil (1) is arranged between every two adjacent keels (904), reinforcing rods (906) are connected to the lower sides of the keels (904) located at four corners of the first support (3) in a rotating mode, the lower ends of the reinforcing rods (906) are connected to the side wall of the first support (3) in a rotating mode, a gas treatment device (907) is fixedly installed on the upper side face of the first support (3), and a gas suction pipe (908) and an exhaust pipe (909) are arranged on the gas treatment device (907), the air suction pipe (908) is inserted into the first support (3), and an air suction pump (9010) is arranged at the connection position of the gas processing device (907) and the exhaust pipe (909).

6. The structure of the vapor extraction complex equipment for soil pollution abatement of claim 5, wherein: four sides of first support (3) are fixedly connected with wind (10) respectively, wind (10) include two fixing bases (1001), are equipped with winding axle (1002) between two fixing bases (1001), the junction of winding axle (1002) and fixing base (1001) is connected through spring (1003), the winding has second matte (11) on winding axle (1002), the outer end fixed connection of second matte (11) is on the lateral wall of sliding frame (901).