阅读说明：本技术 一种远程控制用电动先导活塞阀 (Electric pilot piston valve for remote control ) 是由 余颖 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种远程控制用电动先导活塞阀,包括箱体,所述箱体内设置有推动连接内腔,所述推动连接内腔内滑动的设置有中心对称的滑移块,所述滑移块之间固设有中间配合箱体,所述滑移块内设置有开口的半圆凹腔,所述半圆凹腔一侧设置有与所述推动连接内腔连通的侧连接孔,所述侧连接孔外侧设置有套筒,所述套筒与所述箱体固定配合连接,所述推动连接内腔两侧连通设置有管道内腔,此设备采用了将多种阀体与设备结合,实现了在管道堵住时可以选择多方向的疏通并且设备内部设置有搅碎结构,可以将管道内部的残渣或者浊液等等进行充分的搅碎便于管道疏通。(The invention discloses an electric pilot piston valve for remote control, which comprises a box body, wherein a pushing connection inner cavity is arranged in the box body, the push connecting cavity is internally provided with centrosymmetric sliding blocks in a sliding way, a middle matching box body is fixedly arranged between the sliding blocks, an open semicircular concave cavity is arranged in the sliding block, a side connecting hole communicated with the pushing connecting inner cavity is arranged at one side of the semicircular concave cavity, the outer side of the side connecting hole is provided with a sleeve which is fixedly matched and connected with the box body, the two sides of the pushing connecting inner cavity are communicated with a pipeline inner cavity, the device combines various valve bodies with the device, realizes multi-directional dredging when the pipeline is blocked, and is internally provided with a crushing structure, the residue or turbid liquid and the like in the pipeline can be fully crushed, so that the pipeline is convenient to dredge.)

1. The utility model provides an electric pilot piston valve for remote control, includes the box, be provided with the promotion connection inner chamber in the box, the gliding sliding block that is provided with central symmetry in the promotion connection inner chamber, cooperation box in the middle of having set firmly between the sliding block, be provided with open-ended semicircle cavity in the sliding block, semicircle cavity one side be provided with the side connecting hole that the inner chamber intercommunication is connected in the promotion, the side connecting hole outside is provided with the sleeve, the sleeve with box fixed fit is connected, promotion connection inner chamber both sides intercommunication is provided with the pipeline inner chamber, middle cooperation box with be provided with between the pipeline inner chamber and can with the pipeline inner chamber intracavity turbid liquid carries out the efficient and retrieves and pulverizes the mediation device that pulverizes the mediation, box one side is provided with and makes sliding block and middle cooperation box slide, and make both sides the semicircle cavity will respectively side connecting hole, side connecting, The inner cavity of the pipeline is communicated with the semicircular concave cavity, so that the inner cavity of the pipeline is blocked and dredged.

2. The electric pilot piston valve for remote control according to claim 1, wherein: the crushing dredging device comprises a middle inner cavity arranged in the middle matching box body, a motor-driven and symmetrical matching rotating rod is arranged in the middle inner cavity in a rotating mode, a plurality of stirring blades are fixedly arranged on the outer surface of the matching rotating rod, the directions of penetrating inner cavities on two sides are opposite, an open penetrating inner cavity is formed between the stirring blades, the stirring blades enter the adjacent penetrating inner cavities and are arranged in a propping mode, baffle plates which are bilaterally symmetrical are arranged on the left side and the right side of the middle inner cavity, and a closed matching assembly which enables the baffle plates to slide and move to enable the middle inner cavity to be sealed is arranged between the baffle plates and the middle matching box body.

3. The electric pilot piston valve for remote control according to claim 2, wherein: seal the cooperation subassembly include with a plurality of interior spouts of end wall intercommunication about the middle inner chamber, the homonymy the intercommunication is provided with interior slide opening between the interior spout, be provided with in the interior spout and slide and push the piece, slide push the piece with the side lever has set firmly between the baffle, be provided with the drive in interior spout and the interior spout the structure of sliding when the baffle carries out simultaneous sliding, interior spout one side is provided with and is located just be used for keeping in the middle cooperation box interior spout bottom end wall is clean and make it possesses the elasticity of sliding of resilience characteristic and shelters from the structure to slide to push the piece.

4. The electric pilot piston valve for remote control according to claim 3, wherein: the structure of sliding simultaneously including set up in push fit cylinder between the interior spout end wall, push fit cylinder symmetry sets up, both sides slide to push a piece terminal surface and set firmly the urceolus respectively and the pole is stretched into to the side, be provided with open-ended inner tube chamber in the urceolus, the relative setting of pole is stretched into to inner tube chamber budget book side, urceolus and side stretch into the pole with interior slide opening sliding fit connects, the downside of going up push rod in the push fit cylinder respectively with both sides the urceolus is stretched into the pole with the side and is fixed.

5. The electric pilot piston valve for remote control according to claim 3, wherein: the elasticity that slides shelters from the structure include with the transmission that interior spout intercommunication set up stretches into the chamber, the transmission stretches into chamber one side intercommunication and is provided with power rotation threaded rod, the transmission stretches into the chamber end wall and has set firmly the dress card box, be provided with the opening in the dress card box and hold the chamber, the opening holds gliding removal elastic plate that is provided with in the chamber, remove the elastic plate with opening holds elasticity between the chamber end wall and is provided with buffer spring, it has set firmly the sheltering band to remove elastic plate one side, the sheltering band passes after the transmission stretches into the chamber with it is fixed to slide the pushing block, the transmission stretch into chamber and bottom spout be provided with be used for with the tight sub-assembly that slides of clamp of sheltering band.

6. The electric pilot piston valve for remote control according to claim 5, wherein the clamping and sliding assembly comprises a bottom driving motor disposed in the bottom sliding groove, a power rotating threaded rod is disposed on one side of the bottom driving motor in a power connection manner, a plurality of sliding internal threaded blocks are slidably disposed in the bottom sliding groove and in threaded fit connection with the power rotating threaded rod, a vertical rod is fixedly disposed at the upper end of each sliding internal threaded block, a housing is fixedly disposed at the top of each vertical rod, a transmission fit cavity is disposed in the housing, fit bevel gears to be engaged are disposed in the transmission fit cavity, a squeeze cylinder is disposed on one side of one of the fit bevel gears in a power connection manner, the shielding belts are clamped with the squeeze cylinders after bypassing the squeeze cylinders, and a motor is disposed in the sliding internal threaded block, the motor in the sliding internal thread block is in power connection with the bevel gear close to the sliding internal thread block: .

7. The electric pilot piston valve for remote control according to claim 1, wherein: the conduction device comprises a top cylinder fixedly arranged on the upper end face of the box body, a push rod is arranged in the top cylinder in a power connection mode, the push rod penetrates through the box body in a sliding mode and extends into the push connection inner cavity, and the push rod is fixedly connected with the sliding block in a matched mode.

Technical Field

The invention relates to the technical field of piston valve equipment, in particular to an electric pilot piston valve for remote control.

Background

In general electronic guide piston valve equipment, what most adopted is that utilize electric putter to drive corresponding shutoff piece and realize carrying out the on-off control of water liquid to the inside passageway of valve body, the mode of control is comparatively single at this in-process, and can't make the piston of plugging up and the pipeline of plugging up carry out timely mediation, can't change the inside liquid flow direction of pipeline, if the condition that the pipeline was blockked up has appeared in general design, often only pull down the effective mediation that the piston valve just can realize the pipeline, this degree of difficulty that the piston valve was dismantled and was changed has just been increased, and because inside the pipeline has more turbid liquid and dregs, can't carry out abundant smashing and clearance with above-mentioned turbid liquid and dregs, make the probability that equipment blocked in actual working process increase, make the operational reliability of equipment reduce.

Disclosure of Invention

The present invention is directed to an electric pilot piston valve for remote control, which can solve the above problems of the prior art.

The invention is realized by the following technical scheme: the invention relates to an electric pilot piston valve for remote control, which comprises a box body, wherein a push connecting inner cavity is arranged in the box body, centrally symmetrical sliding blocks are arranged in the push connecting inner cavity in a sliding manner, a middle matching box body is fixedly arranged between the sliding blocks, an open semicircular cavity is arranged in the sliding blocks, a side connecting hole communicated with the push connecting inner cavity is arranged at one side of the semicircular cavity, a sleeve is arranged at the outer side of the side connecting hole and fixedly matched with the box body, a pipeline inner cavity is arranged at two sides of the push connecting inner cavity in a communicating manner, a crushing dredging device capable of efficiently recovering turbid liquid in the pipeline inner cavity and crushing dredging is arranged between the middle matching box body and the pipeline inner cavity, the sliding blocks and the middle matching box body are arranged at one side of the box body, and the semicircular cavities at two sides respectively enable the side connecting hole to be connected with the semicircular, The inner cavity of the pipeline is communicated with the semicircular concave cavity, so that the inner cavity of the pipeline is blocked and dredged.

According to a further technical scheme, the crushing dredging device comprises a middle inner cavity arranged in the middle matching box body, a motor-driven and symmetrical matching rotating rod is arranged in the middle inner cavity in a rotating mode, a plurality of stirring blades are fixedly arranged on the outer surface of the matching rotating rod, the directions of penetrating inner cavities on two sides are opposite, an open penetrating inner cavity is formed between the stirring blades, the stirring blades enter the adjacent penetrating inner cavities and are arranged in a propping mode, baffle plates which are bilaterally symmetrical are arranged on the left side and the right side of the middle inner cavity, and a sealing matching assembly which enables the baffle plates to slide and move to enable the middle inner cavity to be sealed is arranged between the baffle plates and the middle matching box body.

Further technical scheme, seal the cooperation subassembly include with a plurality of interior spouts of end wall intercommunication about the middle inner chamber, the homonymy the intercommunication is provided with interior slide opening between the interior spout, be provided with in the interior spout and slide and push the piece, slide push the piece with the side lever has set firmly between the baffle, be provided with the drive in interior spout and the interior spout the structure of sliding when the baffle carries out simultaneous sliding, interior spout one side is provided with and is located just be used for keeping in the middle cooperation box interior spout bottom end wall is clean and make it possesses the elasticity of sliding of resilience characteristic and shelters from the structure to slide to push the piece.

Further technical scheme, the structure of sliding simultaneously including set up in push cooperation cylinder between the interior spout end wall, push cooperation cylinder symmetry setting, both sides slide and push a piece terminal surface and set firmly urceolus and side respectively and stretch into the pole, be provided with open-ended inner tube chamber in the urceolus, the relative setting of pole is stretched into to inner tube chamber budget book side, urceolus and side stretch into the pole with interior slide opening sliding fit connects, the downside of going up push rod in the cooperation cylinder of pushing respectively with both sides urceolus and side stretch into the pole and fix.

Further technical scheme, the elasticity that slides shelters from the structure include with the transmission that interior spout intercommunication set up stretches into the chamber, the transmission stretches into chamber one side intercommunication and is provided with power rotation threaded rod, the transmission stretches into the chamber end wall and has set firmly the dress card box, be provided with the opening in the dress card box and hold the chamber, the opening holds gliding removal elastic plate that is provided with in the chamber, remove the elastic plate with elasticity is provided with buffer spring between the opening appearance chamber end wall, it has set firmly the sheltering band to remove elastic plate one side, the sheltering band passes after the transmission stretches into the chamber with it is fixed to slide the pushing block, the transmission stretches into be provided with in chamber and the bottom spout and is used for with the tight sub-assembly that tightly slides of clamp of sheltering band.

In a further technical scheme, the clamping and sliding assembly comprises a bottom driving motor arranged in the bottom sliding chute, one side of the bottom driving motor is provided with a power rotating threaded rod in a power connection mode, a plurality of sliding inner threaded blocks are arranged in the bottom sliding groove in a sliding mode, the sliding internal thread block is in threaded fit connection with the power rotating threaded rod, a vertical rod is fixedly arranged at the upper end of the sliding internal thread block, a shell is fixedly arranged at the top of the vertical rod, a transmission matching cavity is arranged in the shell, a matching bevel gear to be meshed is arranged in the transmission matching cavity, one side of one of the matched bevel gears is provided with an extrusion cylinder in a power connection way, the shielding belt respectively bypasses the extrusion cylinder and then is clamped with the extrusion cylinder, the bevel gear is characterized in that a motor is arranged in the sliding internal thread block, and the motor in the sliding internal thread block is in power connection with the bevel gear matched with the sliding internal thread block.

According to the technical scheme, the conduction device comprises a top cylinder fixedly arranged on the upper end face of the box body, a push rod is arranged in the top cylinder in a power connection mode, the push rod penetrates through the box body in a sliding mode and extends into the push connection inner cavity, and the push rod is connected with the sliding block in a fixed matching mode.

The invention has the beneficial effects that:

the device has a simple structure, combines various valve bodies with the device, realizes multi-directional dredging when the pipeline is blocked, and can fully stir residues or turbid liquid and the like in the pipeline to facilitate the pipeline dredging by arranging the stirring structure in the device.

During the initial state, above-mentioned device, subassembly and structure are in the stop work state, and this equipment can utilize the flexible regulation of top cylinder the position of sliding block and middle cooperation box makes the pipeline inner chamber can carry out the efficient mediation when plugging up, and be provided with in the middle cooperation box and be used for pushing and smash the function of debris in the pipeline inner chamber, avoid blocking up in the pipeline inner chamber.

When blocking up in the pipeline inner chamber, need utilize the semicircle cavity will side connecting hole and pipeline inner chamber intercommunication respectively, will come to the turbid liquid derivation equipment that pipeline inner chamber one side blocked up, then this moment top cylinder drive after the work top cylinder reciprocates with middle cooperation box, and at last downside respectively screw-thread fit connects the pipeline in the sleeve the sliding block and middle cooperation box reciprocate the in-process, utilize the molding of semicircle cavity makes respectively the pipeline inner chamber with the side connecting hole communicates, will the turbid liquid of intracavity in the pipeline by the semicircle cavity is discharged the exterior space can.

When the middle matching box body is positioned between the inner cavities of the pipelines at two sides, and the turbid liquid impurities in the inner cavities of the pipelines are fully crushed by utilizing the structure in the middle matching box body so as to prevent equipment congestion, at the moment, the matching rotary rod is driven to rotate under the action of the motor, the impurities in the middle inner cavity can be fully crushed by utilizing the design of the stirring blades and the penetrating inner cavity after the stirring blades at two sides rotate relatively, in the crushing process, the baffle plate can be driven to periodically approach each other under the drive of the internal structure of the equipment, the purpose is to form a sealed space at two sides of the middle inner cavity so as to facilitate the sufficient crushing of the impurities and the like between the stirring blades, at the moment, the outer cylinders and the side extending-in rods at two sides are driven to move relatively or far away from each other after the pushing and matching air cylinder works, so that the sliding pushing block slides in the inner chute, the outer cylinder and the side extension rod can seal the top of the inner chute, the sliding pushing block can utilize the shielding belt to enable the movable elastic plate to extrude the buffer spring in the sliding process, so that the sliding pushing block has the indirect rebounding function, and in the rebounding process of the sliding pushing block, the motor in the sliding inner thread block can also drive the matching bevel gear to rotate, so that the extrusion cylinder rotates to drive the shielding belt to move, the purpose is to enable the shielding belt to extend into the inner chute, then the shielding belt is utilized to abut against the lower end wall of the inner chute, the running area of the sliding pushing block is kept clean, the sliding pushing block is prevented from being clamped or contaminated, and the clamping effect of the extrusion cylinder on the shielding belt can be adjusted in actual work, at the moment, the bottom driving motor drives after working the power rotating threaded rod rotates, so that the power rotating threaded rod drives after rotating the sliding internal thread block to slide, and the clamping effect of the blocking belt on the extrusion container can be changed.

Drawings

For ease of illustration, the invention is described in detail by the following specific examples and figures.

Fig. 1 is a schematic view of an internal overall structure of an electric pilot piston valve for remote control according to the present invention;

FIG. 2 is a schematic view at A in FIG. 1;

FIG. 3 is a schematic view of the direction B-B in FIG. 2;

FIG. 4 is a schematic view at C of FIG. 2;

FIG. 5 is a schematic view at D of FIG. 2;

in the figure, a pipeline inner cavity 11, a side connecting hole 12, a sleeve 14, a box body 15, a push rod 16, a top cylinder 17, a push connecting inner cavity 18, a sliding block 19, a semicircular cavity 21, a stirring blade 22, a penetrating inner cavity 23, an intermediate inner cavity 24, an intermediate matching box body 25, a side rod 26, a baffle 27, a matching rotary rod 28, an outer cylinder 31, an inner cylinder cavity 32, an inner sliding groove 33, a shell 34, a matching bevel gear 35, a clamping box body 36, a buffer spring 37, an opening containing cavity 38, a squeezing cylinder 39, a transmission matching cavity 41, a bottom driving motor 42, a vertical rod 43, a sliding inner thread block 44, a power rotating threaded rod 45, a bottom sliding groove 46, a transmission extending cavity 47, a shielding belt 48, a sliding pushing block 49, a moving elastic plate 51, an inner sliding hole 52, a side extending rod 53 and a pushing matching cylinder 54 are arranged.

Detailed Description

As shown in fig. 1 to 5, the present invention is explained in detail, and for convenience of description, the following orientations are defined as follows: the following up-down left-right front-back direction is consistent with the up-down left-right front-back direction of the projection relation of the figure 1, the electric pilot piston valve for remote control comprises a box body 15, a push connecting inner cavity 18 is arranged in the box body 15, centrally symmetrical sliding blocks 19 are arranged in the push connecting inner cavity 18 in a sliding manner, a middle matching box body 25 is fixedly arranged between the sliding blocks 19, an open semicircular concave cavity 21 is arranged in the sliding block 19, a side connecting hole 12 communicated with the push connecting inner cavity 18 is arranged at one side of the semicircular concave cavity 21, a sleeve 14 is arranged at the outer side of the side connecting hole 12, the sleeve 14 is fixedly matched and connected with the box body 15, a pipeline inner cavity 11 is communicated at two sides of the push connecting inner cavity 18, a dredging device capable of efficiently recovering and dredging turbid liquid in the pipeline inner cavity 11 is arranged between the middle matching box body 25 and the pipeline inner cavity 11, one side of the box body 15 is provided with a conduction device which enables the sliding block 19 and the middle matching box body 25 to slide, and enables the semicircular cavities 21 on the two sides to respectively communicate the side connecting hole 12, the pipeline inner cavity 11 and the semicircular cavities 21 so as to dredge the blockage in the pipeline inner cavity 11.

Advantageously, the crushing dredging device comprises a middle inner cavity 24 arranged in the middle matching box 25, a motor-driven and symmetrical matching rotating rod 28 is rotatably arranged in the middle inner cavity 24, a plurality of stirring blades 22 are fixedly arranged on the outer surface of the matching rotating rod 28, the penetrating inner cavities 23 on two sides face oppositely, an open penetrating inner cavity 23 is formed between the stirring blades 22, the stirring blades 22 enter the adjacent penetrating inner cavities 23 and are arranged in an abutting mode, baffle plates 27 which are symmetrical left and right are arranged on the left and right sides of the middle inner cavity 24, and a close matching assembly which enables the baffle plates 27 to slide and move to close the middle inner cavity 24 is arranged between the baffle plates 27 and the middle matching box 25.

Beneficially, the sealing matching assembly comprises a plurality of inner sliding grooves 33 communicated with the upper end wall and the lower end wall of the middle inner cavity 24, inner sliding holes 52 are communicated and arranged between the inner sliding grooves 33 on the same side, sliding pushing blocks 49 are arranged in the inner sliding grooves 33, side rods 26 are fixedly arranged between the sliding pushing blocks 49 and the baffle plates 27, simultaneous sliding structures for driving the baffle plates 27 to slide simultaneously are arranged in the inner sliding grooves 33 and the inner sliding holes 52, and a sliding elastic shielding structure which is located in the middle matching box body 25 and used for keeping the bottom end walls of the inner sliding grooves 33 clean and enabling the sliding pushing blocks 49 to have rebound characteristics is arranged on one side of the inner sliding grooves 33.

Advantageously, the simultaneous sliding structure includes a pushing fit cylinder 54 disposed between the end walls of the inner sliding chute 33, the pushing fit cylinder 54 is symmetrically disposed, the end surfaces of the sliding push blocks 49 on both sides are respectively fixedly provided with an outer cylinder 31 and a side extending rod 53, an open inner cylinder cavity 32 is disposed in the outer cylinder 31, the book side extending rod 53 of the inner cylinder cavity 32 is oppositely disposed, the outer cylinder 31 and the side extending rod 53 are connected with the inner sliding hole 52 in a sliding fit manner, and push rods in the pushing fit cylinder 54 on the upper side and the lower side are respectively fixed with the outer cylinder 31 and the side extending rod 53 on both sides.

Beneficially, wherein, the elastic sliding shielding structure comprises a transmission extending cavity 47 communicated with the inner chute 33, a power rotating threaded rod 45 is communicated with one side of the transmission extending cavity 47, a clamping box body 36 is fixedly arranged on the end wall of the transmission extending cavity 47, an opening accommodating cavity 38 is arranged in the clamping box body 36, a movable elastic plate 51 is arranged in the opening accommodating cavity 38 in a sliding manner, a buffer spring 37 is elastically arranged between the movable elastic plate 51 and the end wall of the opening accommodating cavity 38, a shielding belt 48 is fixedly arranged on one side of the movable elastic plate 51, the shielding belt 48 penetrates through the transmission extending cavity 47 and then is fixed with the sliding pushing block 49, and a clamping sliding assembly used for clamping and sliding the shielding belt 48 is arranged in the transmission extending cavity 47 and the bottom chute 46.

Advantageously, the clamping and sliding assembly comprises a bottom driving motor 42 arranged in the bottom sliding groove 46, a power rotating threaded rod 45 is arranged on one side of the bottom driving motor 42 in a power connection mode, a plurality of sliding inner threaded blocks 44 are arranged in the bottom sliding groove 46 in a sliding mode, the sliding inner threaded blocks 44 are in threaded fit connection with the power rotating threaded rod 45, a vertical rod 43 is fixedly arranged at the upper end of each sliding inner threaded block 44, a shell 34 is fixedly arranged on the top of each vertical rod 43, a transmission fit cavity 41 is arranged in the shell 34, fit bevel gears 35 to be meshed are arranged in the transmission fit cavity 41, an extrusion barrel 39 is arranged on one side of one of the fit bevel gears 35 in a power connection mode, shielding belts 48 are respectively wound around the extrusion barrel 39 and clamped with the extrusion barrel 39, and a motor is arranged in each sliding inner threaded block 44, the motor in the sliding internal thread block 44 is in power connection with the matching bevel gear 35 close to the sliding internal thread block 44.

Advantageously, the conducting device comprises a top cylinder 17 fixedly arranged on the upper end surface of the box body 15, a push rod 16 is arranged in the top cylinder 17 in a power connection mode, the push rod 16 slidably penetrates through the box body 15 and extends into the push connection inner cavity 18, and the push rod 16 is fixedly connected with the sliding block 19 in a matching mode.

When the device, the assembly and the structure are in a stop working state in an initial state, the device can utilize the top cylinder 17 to telescopically adjust the positions of the sliding block 19 and the middle matching box body 25, so that the inner cavity 11 of the pipeline can be efficiently dredged when being blocked, and the middle matching box body 25 is internally provided with a function for pushing and crushing sundries in the inner cavity 11 of the pipeline, so that the blockage in the inner cavity 11 of the pipeline is avoided.

When blocking up in the pipeline inner chamber 11, need utilize semicircle cavity 21 will side connecting hole 12 and pipeline inner chamber 11 intercommunication respectively, will come to the turbid liquid derivation equipment that pipeline inner chamber 11 one side blocked up, then at this moment top cylinder 17 work back drive top cylinder 17 and middle cooperation box 25 reciprocate, and at last downside the pipeline has been connected in the sleeve 14 screw-thread fit respectively the in-process is reciprocated to sliding block 19 and middle cooperation box 25, utilizes semicircle cavity 21's molding makes respectively pipeline inner chamber 11 with side connecting hole 12 communicates, will the turbid liquid in the pipeline inner chamber 11 by semicircle cavity 21 discharges to the exterior space can.

When the middle matching box 25 is located between the pipe inner cavities 11 on both sides, and the structure in the middle matching box 25 is utilized to fully crush the turbid liquid impurities in the pipe inner cavities 11 to prevent the equipment from being jammed, at this time, the matching rotary rod 28 is driven by the motor to rotate, the stirring blades 22 on both sides are utilized to fully crush the impurities in the middle inner cavity 24 after relative rotation, and the baffle 27 can be periodically moved close to each other under the driving of the internal structure of the equipment during crushing, so as to form a sealed space on both sides of the middle inner cavity 24, so as to fully crush the impurities and the like between the stirring blades 22, at this time, the outer cylinder 31 and the side inserting rod 53 on both sides are driven to move relatively or away from each other after the pushing matching cylinder 54 is operated, the sliding pushing block 49 slides in the inner chute 33, and the outer cylinder 31 and the side inserting rod 53 can close the top of the inner chute 33, because the sliding pushing block 49 can utilize the shielding belt 48 to make the movable elastic plate 51 extrude the buffer spring 37 in the sliding process, the sliding pushing block 49 has the indirect rebound function, and in the rebound process of the sliding pushing block 49, the motor in the sliding inner thread block 44 can also drive the matching bevel gear 35 to rotate, so that the extruding cylinder 39 drives the shielding belt 48 to move after rotating, in order to make the shielding belt 48 extend into the inner chute 33, utilize the shielding belt 48 to abut against the lower end wall of the inner chute 33, keep the clean running area of the sliding pushing block 49, and avoid the sliding pushing block 49 or dirt contamination, in actual work, the effect that the extrusion cylinder 39 clamps the shielding belt 48 can be adjusted, at the moment, the bottom driving motor 42 drives the power rotating threaded rod 45 to rotate after working, so that the power rotating threaded rod 45 drives the sliding inner thread block 44 to slide after rotating, and the clamping effect of the extrusion cylinder 39 on the shielding belt 48 can be changed.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.