A kind of rotary sack cleaner
Technical field
The utility model is related to dust removal field, is specifically a kind of sack cleaner.
Background technology
Constantly strengthen with Public environmental attitude as environmental regulation is increasingly improved, environmental protection is common as the whole mankind
Target.China is maximum developing country, and steel, cement, the production of coal and consumption occupy the position that beats the world.These
The volume of smoke produced in industry and other industrial circle production processes is the one of the main reasons for causing atmosphere pollution.Industrial cigarette
Dirt improvement is the emphasis place of environmental protection.Deduster kind applied to flue dust, elimination of dust contamination is more, and wherein electrostatic is removed
Dirt device and sack cleaner are two major class high-efficiency dust removers.This two classes deduster is each advantageous, and by contrast, sack cleaner is removed
Dirt efficiency is higher than electrostatic precipitator (to be up to 99.99% in laboratory, 99.9%, dust emission is also can reach in actual applications
Concentration can reach 10m and stay below Nm3, or even lm to stay Nm3);And the physics and chemical property of performance not too dependent on dust.With
Country implements soot emissions overall control, and the requirement to elimination of dust contamination comes higher;Bag type dust removing technology is in itself also continuous
Progressive, its application field is more and more broader.In addition to traditional application field such as steel, nonferrous metallurgy, carbon black, in electric power, city
The application of the industries such as waste incineration also have developed rapidly, and bag type dust removing technology is accounted in industrial fumes improvement has had leading position.
But, there is certain requirement to the environment used in bag-type dusting, such as in southern china or other are more damp
Wet place, rainwater is more, and air humidity is big so that the water content in waste gas is too high, usually reaches 15 ~ 20%, is using merely
During bag-type dust collecting equipment, it may appear that the problem of condensing, glue bag so that cleaner fails.
Utility model content
The purpose of this utility model is:For above-mentioned problem, there is provided a kind of rotary bag-type dusting, unconventional rotation
The disengaging of the mode flue dust turned.
The technical solution adopted in the utility model is as follows:
The utility model discloses a kind of rotary sack cleaner, including air inlet pipe, coarse filtration net, rotating filter
Bag body, electric device, breather line, housing;
Air inlet pipe connects the smoke inlet of deduster, and air inlet pipe is provided with coarse filtration net, rotates through the lower end of filter bag body
Provided with the electric device that can rotate it, the upper end for rotating through filter bag body is provided with breather line, and breather line and air enter
Mouth pipe connection, described air intlet pipe is provided with air pump;
It is described rotate through filter bag body include between separate filter bag, adjacent filter bag in the horizontal direction provided with
Grain passage, particle path lower end is that separation net is provided between the opening for particles fall, adjacent two filter bags up and down, rotation
Filter bag body is covered with filter bag shell is rotated through, and described rotates through filter bag shell and electric device connection.
As an improvement, the wide 10mm-100mm of described particle path.
As an improvement, the described lower end for rotating through filter bag body is provided with above division board, described division board provided with use
The conduit passed through in soot dust granule, the cross section of described conduit is wide at the top and narrow at the bottom trapezoidal.
As an improvement, the triangular prism between adjacent conduit to raise up.
Ball is provided between filter bag body and housing as an improvement, rotating through, described inner walls and filter bag is rotated through
Body is provided with the groove for ball rotary rolling, and described ball contains 0.01-0.5% chromium carbide.
As an improvement, described air pump is provided with flow control system, described flow control system includes setting and air inlet pipe
On flow detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is can
To control the metering air pump of gas flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
As an improvement, described filtrate is appointed with for cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component
The fibre blend of meaning ratio.
As an improvement, described synthetic fibers be Fypro, polyester fiber, polyurethane elastomeric fiber, polyurea fibre,
Polyformaldehyde fibre, polyimide fiber, polyacrylonitrile fibre, vinylon, one kind of polyvinyl chloride fibre or several
The mixture planted.
As an improvement, described polyimide fiber is the fiber after spinning is heat-treated.
As an improvement, described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, cuprammonium are fine
10-20 parts of dimension, 1-5 parts of coupling agent, described coupling agent is selected from KH550, KH560, KH570, KH792, DL602, DL171.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are:
First, the utility model is by way of rotation so that the dust adsorbed by fibrous material is in the presence of centripetal force
Progress can timely be departed from, into particle path, then fallen along particle path in the presence of gravity, and in bottom
Be collected, relative with existing technology, soot dust granule goes title to enable to fiber adsorbing material to recover assimilation effect in time, up to
To under equal dust removing effects, fiber adsorbing material used reduces 30-50%, reduces the cost of investment of cleaner;
2nd, the utility model provides the conception plans using Rotary dust collecting, phase to deduster, particularly sack cleaner
Closing technical staff can be further improved, and then equipment investment cost is greatly reduced.
Brief description of the drawings
Fig. 1 is the deduster cross-sectional view that the utility model is improved;
Fig. 2 is the schematic diagram of the utility model division board;
Fig. 3 is the partial section of the utility model division board;
Marked in figure:1- air inlet pipe, 2- housings, 21- balls, 3- rotates through filter bag body, and 31- filter bags, 32- particles lead to
Road, 33- separation nets, 34- rotates through filter bag shell, 4- electric devices, 5- division boards, 51- conduits, 52- triangular prisms, 6- coarse filtrations
Net, 7- breather lines, 8- air pumps.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
Specific embodiment 1:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 10mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.01% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are Fypro.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 10 parts of CUP, it is even
Join 1 part of agent, described coupling agent is selected from KH550.
Specific embodiment 2:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 100mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.5% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are polyester fiber.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 20 parts of CUP, it is even
Join 5 parts of agent, described coupling agent is selected from KH560.
Specific embodiment 3:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 20mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.1% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are polyurethane elastomeric fiber.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 15 parts of CUP, it is even
Join 3 parts of agent, described coupling agent is selected from KH570.
Specific embodiment 4:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 10mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.5% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are polyurea fibre.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 10 parts of CUP, it is even
Join 5 parts of agent, described coupling agent is selected from KH792.
Specific embodiment 5:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 100mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.01% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are polyformaldehyde fibre.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 20 parts of CUP, it is even
Join 1 part of agent, described coupling agent is selected from DL602.
Specific embodiment 6:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 10mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.2% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are polyimide fiber.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 10 parts of CUP, it is even
Join 3 parts of agent, described coupling agent is selected from DL171.
Specific embodiment 7:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 10mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.01% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are polyacrylonitrile fibre.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 10 parts of CUP, it is even
Join 5 parts of agent, described coupling agent is selected from DL171.
Specific embodiment 8:As Figure 1-3, a kind of rotary sack cleaner, it is characterised in that including air inlet pipe 1,
Coarse filtration net 6, rotate through filter bag body 3, electric device 4, breather line 7, housing 2;
Air inlet pipe 1 connects the smoke inlet of deduster, and air inlet pipe 1 is provided with coarse filtration net 6, rotates through filter bag body 3
Lower end is provided with the electric device 4 that can rotate it, and the upper end for rotating through filter bag body 3 is provided with breather line 7, breather line 7
With the connection of air intlet pipe, described air intlet pipe is provided with air pump 8;
The described filter bag body 3 that rotates through is included between separate filter bag 31, adjacent filter bag 31 in the horizontal direction
Provided with particle path 32, the lower end of particle path 32 is to be set between the opening for particles fall, adjacent two filter bags 31 up and down
There is separation net 33, rotate through filter bag body 3 covered with filter bag shell 34 is rotated through, described rotates through filter bag shell 34 and electronic
Device 4 is connected.
The described width of particle path 32 10mm.
The described lower end for rotating through filter bag body 3 is provided with division board 5, and described division board 5 is provided with above is used for flue dust
The conduit 51 that particle passes through, the cross section of described conduit 51 is wide at the top and narrow at the bottom trapezoidal.
Triangular prism 52 between adjacent conduit 51 to raise up.
Rotate through and ball 21 is provided between filter bag body 3 and housing 2, the described inwall of housing 2 and rotate through filter bag body 3
The groove for the rotary rolling of ball 21 is provided with, described ball 21 contains 0.5% chromium carbide.
Described air pump 8 is provided with flow control system, and described flow control system includes setting and the flow in air inlet pipe 1
Detector, the controller being connected with flow monitor, described controller and air pump connection, described air pump is that can control gas
The metering air pump of body flow;
Detected flue gas flow signal is transferred to controller by described flow detector, described controller according to
The size of flue gas flow signal controls to measure the air mass flow of air pump accordingly.
The described filtrate fibre for being cotton fiber, wool fibre, synthetic fibers, glass fibre or its any component arbitrary proportion
Tie up mixture.
Described synthetic fibers are vinylon.
Described polyimide fiber is the fiber after spinning is heat-treated.
Described polyimide fiber each component listed as parts by weight, including 100 parts of polyimides, 20 parts of CUP, it is even
Join 1 part of agent, described coupling agent is selected from DL602.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modifications, equivalent substitutions and improvements made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.