CN219337894U

CN219337894U - Foam cutting pushing table

Info

Publication number: CN219337894U
Application number: CN202223558059.1U
Authority: CN
Inventors: 郭智利; 王震
Original assignee: Shiyan Huaying Mold Manufacturing Co ltd
Current assignee: Shiyan Huaying Mold Manufacturing Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-07-14
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a foam cutting pushing table, which relates to the technical field of foam cutting and comprises the following components: a fixing plate; the bottom end of the fixed plate is in a rectangular array shape and is fixedly connected with four supporting frames; the outer wall of the fixed plate is fixedly connected with four connecting columns in a central array shape; the four connecting columns are aligned with the positions of the four supporting frames respectively; the top end surfaces of the four connecting columns are fixedly connected with a fixing frame; the third hydraulic push rod is started, the two third hydraulic push rods simultaneously push the positioning clamping plates to move inwards, the foam to be cut is straightened through the middle movement of the two positioning clamping plates, the foam to be cut is transversely limited, and then the first hydraulic push rod is started, so that the first hydraulic push rod drives the pressing disc to move downwards to longitudinally limit the foam to be cut, and the problem that workers are required to manually straighten the offset foam in the foam moving process is solved, and the operation is complex is solved.

Description

Foam cutting pushing table

Technical Field

The utility model relates to the technical field of foam cutting, in particular to a foam cutting pushing table.

Background

In the process of foam production and processing, the foam needs to be cut according to the requirement of use generally, and in order to conveniently cut the foam, the staff can use the foam cutting pushing table generally, and current foam cutting pushing table is usually formed by a support frame and a cutting frame, and when in use, the heating wire is wound on the cutting frame, then the foam to be cut is placed on the support frame, the foam on the support frame is pushed, and the foam is gradually contacted with the heating wire to complete cutting.

For example: the utility model discloses a foam cutting device for foam production, which specifically comprises a support plate, a support leg, a first roller, a conveyor belt, a first bracket, a sliding block, a reset spring, a second roller, a second bracket, a rotating shaft, a sliding chute, a cutter main body, a cutting cutter, a rocker, an eccentric wheel, a connecting rod, a motor, a driving wheel, a driven wheel, a conveyor belt, a material receiving sliding rail, a cutting groove and a control switch, wherein one end of the reset spring is arranged on the first bracket, the other end of the reset spring is arranged on the sliding block, the second roller is hinged on the sliding block, the rocker is hinged on the cutter main body, the eccentric wheel is arranged on the rotating shaft, one end of the connecting rod is hinged on the rocker, the other end of the connecting rod is hinged on the eccentric wheel, and the motor is arranged on the support plate and the first roller. The utility model belongs to the technical field of foam cutting devices, and particularly relates to a foam cutting device which is provided with an elastic pressure stabilizing device and can automatically convey and cut for foam production.

However, with regard to the traditional foam cutting pushing table at present, the foam is pushed to move and cut through the conveyor belt in the process of cutting, but the foam is easy to deviate in the process of moving along with the conveyor belt, and the cutting precision of the foam is easy to influence in the process of follow-up cutting, so that workers are required to manually correct the deviate foam in the process of moving the foam, the operation is complex, and the labor intensity of the workers is high.

Disclosure of Invention

In view of the above, the utility model provides a foam cutting pushing table, which is provided with a guide sliding seat capable of conveniently limiting moving foam, when the foam is cut, the foam to be cut is placed on a pushing table top, a second hydraulic push rod is started to drive a positioning ring to move downwards until a third hydraulic push rod is aligned with the position of the foam to be cut, at the moment, the third hydraulic push rod is started, so that the two third hydraulic push rods simultaneously push a positioning clamping plate to move inwards, the foam to be cut is aligned through the middle movement of the two positioning clamping plates, the foam to be cut is transversely limited, then the first hydraulic push rod is started, the first hydraulic push rod drives a pressing disc to move downwards to longitudinally limit the foam to be cut, the foam to be cut is prevented from being offset in the process of pushing the foam to be cut, the cutting yield of the foam is effectively improved, a first driving motor is started to drive a control screw to rotate, the guide sliding seat is driven to move through the rotation of the control screw, the guide sliding seat is guided by the guide sliding rod in the moving process of the guide sliding seat, and the foam is pushed to move through the movement of the guide sliding seat.

The utility model provides a foam cutting pushing table, which specifically comprises: a fixing plate; the bottom end of the fixed plate is in a rectangular array shape and is fixedly connected with four supporting frames; the outer wall of the fixed plate is fixedly connected with four connecting columns in a central array shape; the four connecting columns are aligned with the positions of the four supporting frames respectively; the top end surfaces of the four connecting columns are fixedly connected with a fixing frame; a sliding groove is formed in the middle of the top end face of the fixing frame in a penetrating mode; a guide chute is arranged in the middle of the left end face of the sliding groove and the right end face of the sliding groove; the positions of the two guide sliding grooves are aligned; two purifying boxes are symmetrically and fixedly connected to the rear part of the outer wall of the fixing frame; two mounting seats are symmetrically and fixedly connected to the rear part of the outer wall of the fixing plate.

Optionally, an auxiliary groove is formed in the middle of the inner sides of the two mounting seats; the top end surfaces of the two mounting seats are fixedly connected with a second driving motor through bolts; the bottom end surfaces of the two second driving motors are coaxially connected with a lifting screw rod; the tail ends of the two lifting screws are respectively and rotatably connected to the bottom end surfaces of the two auxiliary grooves; an auxiliary sliding seat is connected to the outer walls of the two lifting screws in a threaded manner; the two auxiliary sliding seats are respectively and slidably connected in the two auxiliary grooves.

Optionally, the rear end surfaces of the two auxiliary sliding seats are fixedly connected with a threading block; the left end surfaces of the two threading blocks are respectively provided with a threading hole in a penetrating way in the middle; the rear part of the bottom end surface of the fixed plate is fixedly connected with a tensioning seat; two tensioning rings are symmetrically and fixedly connected to the top end surface of the tensioning seat; the two tensioning rings are aligned with the positions of the two threading blocks respectively.

Optionally, a first driving motor is fastened and connected to the left part of the rear end surface of the fixing frame through bolts; the front end surface of the first driving motor is coaxially connected with a control screw rod; the control screw is arranged in the left guide chute; a guide sliding rod is fixedly connected in the right guide sliding groove; a guide sliding seat is connected between the two guide sliding grooves in a sliding way; the control screw is in threaded connection with the left part of the guide slide seat; the guide slide bar is connected in the right part of the guide slide seat in a sliding way.

Optionally, a first hydraulic push rod is fixedly connected in the guide sliding seat in the middle; the bottom end surface of the first hydraulic push rod is fixedly connected with a pressing disc; two second hydraulic push rods are symmetrically and fixedly connected in the guide sliding seat; the bottom end surfaces of the two second hydraulic push rods are fixedly connected with a positioning ring; a third hydraulic push rod is fixedly connected in each of the two positioning rings; the tail ends of the two third hydraulic push rods are fixedly connected with a positioning clamping plate; the top end surface of the fixed plate is fixedly connected with a pushing table top; the pushing table top is of a rectangular block structure made of glass.

Optionally, an exhaust fan is fixedly arranged in the lower parts of the two purifying boxes; an active carbon filter screen is fixedly arranged in the upper parts of the two purifying boxes; the two active carbon filter screens are aligned with the positions of the two exhaust fans respectively; the top end surfaces of the two purifying boxes are fixedly connected with an exhaust pipe in the middle; the rear end surfaces of the two purifying boxes are fixedly connected with a gas pipe; two auxiliary plates are symmetrically and fixedly connected to the rear part of the bottom end surface of the fixing frame; the two gas delivery pipes are respectively and fixedly connected in the two auxiliary plates; the tail ends of the two air delivery pipes are fixedly connected with an air collecting hopper.

Advantageous effects

In the using process, the foam cutting pushing table can effectively limit the foam in the process of pushing the foam to cut, prevent the foam from shifting in the moving process, effectively improve the cutting yield of the foam, collect and treat waste gas generated by cutting the foam by the electric heating wire, and prevent the waste gas generated by cutting the foam by the electric heating wire from polluting the environment around the foam cutting pushing table.

In addition, through starting second driving motor, make second driving motor drive lifting screw and rotate, make supplementary slide go up and down and drive the threading piece and go up and down in supplementary inslot through lifting screw's rotation, and then through the height adjustment to the heating wire to the lift of threading piece, make the foam cutting push table can cut the foam of not co-altitude, increase the practicality of foam cutting push table.

In addition, when cutting the foam, will wait to cut the foam and place the promotion mesa on, start second hydraulic push rod drive the holding ring and move downwards until third hydraulic push rod aligns with the position of waiting to cut the foam, start third hydraulic push rod this moment, make two third hydraulic push rods promote the locating splint simultaneously inwards and move, it is right to wait to cut the foam through the motion of two locating splints to the motion of going forward, and wait to cut the foam and transversely spacing, then start first hydraulic push rod, make first hydraulic push rod drive the pressure strip and move downwards and wait to cut the foam and carry out vertical spacing, prevent to wait to cut the foam and take place the skew in the in-process of pushing the cutting and influence the cutting effect of foam, the effectual cutting yield that improves the foam.

In addition, at the in-process of cutting the foam, start the air exhauster, make the air exhauster collect the waste gas that produces when the heating wire cutting foam through the collection wind scoop, the waste gas of collecting passes through the gas-supply pipe and gets into the purifying box, and the waste gas of purifying box passes through the gas-supply pipe and discharges after the active carbon filter screen filters, and the waste gas that produces when preventing the heating wire cutting foam causes the pollution to the air around the foam cutting pushing table, effectually guaranteed staff's healthy.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

In the drawings:

FIG. 1 is a schematic diagram of an axial structure of the present utility model.

FIG. 2 is a schematic diagram of an axial structure of a push table of the present utility model.

Fig. 3 is a schematic diagram of an axial structure of the fixing frame of the present utility model.

Fig. 4 is a schematic cross-sectional view of the guide carriage of the present utility model.

FIG. 5 is a schematic cross-sectional view of the purifying tank of the present utility model.

List of reference numerals

1. A fixing plate; 101. a support frame; 102. a connecting column; 103. a fixing frame; 104. a sliding groove; 105. a guide chute; 106. a guide slide bar; 107. a first driving motor; 108. a control screw; 109. a guide slide; 110. a first hydraulic pushrod; 111. a pressing plate; 112. a second hydraulic pushrod; 113. a positioning ring; 114. a third hydraulic pushrod; 115. positioning clamping plates; 116. a mounting base; 117. an auxiliary groove; 118. an auxiliary slide; 119. a second driving motor; 120. lifting screw rods; 121. a threading block; 122. tensioning the seat; 123. a tension ring; 124. pushing the table top; 125. a purifying box; 126. an exhaust fan; 127. an active carbon filter screen; 128. an exhaust pipe; 129. a gas pipe; 130. a wind collecting hopper; 131. and an auxiliary plate.

Detailed Description

In order to make the objects, aspects and advantages of the technical solution of the present utility model more clear, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present utility model. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

Examples: please refer to fig. 1 to 5:

the utility model provides a foam cutting pushing table, which comprises: a fixing plate 1;

the bottom end of the fixed plate 1 is in a rectangular array shape and is fixedly connected with four supporting frames 101; the outer wall of the fixed plate 1 is fixedly connected with four connecting columns 102 in a central array shape; the four connecting columns 102 are aligned with the positions of the four supporting frames 101 respectively; the top end surfaces of the four connecting columns 102 are fixedly connected with a fixing frame 103; a sliding groove 104 is formed in the middle of the top end surface of the fixing frame 103 in a penetrating manner; a guide chute 105 is arranged in the middle of the left end face of the sliding groove 104 and the right end face of the sliding groove 104; the positions of the two guide sliding grooves 105 are aligned; two purifying boxes 125 are symmetrically and fixedly connected to the rear part of the outer wall of the fixing frame 103; two mounting seats 116 are symmetrically and fixedly connected to the rear part of the outer wall of the fixing plate 1.

Furthermore, according to the embodiment of the present utility model, as shown in fig. 1 and 2, an auxiliary groove 117 is centrally formed on the inner sides of both the mounting seats 116; the top end surfaces of the two mounting seats 116 are connected with a second driving motor 119 in a bolt fastening manner; the bottom end surfaces of the two second driving motors 119 are coaxially connected with a lifting screw 120; the tail ends of the two lifting screws 120 are respectively and rotatably connected to the bottom end surfaces of the two auxiliary grooves 117; an auxiliary sliding seat 118 is connected on the outer wall of each lifting screw 120 in a threaded manner; the two auxiliary sliding seats 118 are respectively and slidably connected in the two auxiliary grooves 117, so that the second driving motor 119 is started to drive the lifting screw 120 to rotate, the auxiliary sliding seats 118 are driven to slide in the auxiliary grooves 117 in the rotating process of the lifting screw 120, and the auxiliary sliding seats 118 are driven to lift in the auxiliary grooves 117 through the rotation of the lifting screw 120.

In addition, according to the embodiment of the present utility model, as shown in fig. 2, a threading block 121 is fixedly connected to the rear end surfaces of the two auxiliary carriages 118; the left end surfaces of the two threading blocks 121 are respectively provided with a threading hole in a penetrating way in the middle; the rear part of the bottom end surface of the fixed plate 1 is fixedly connected with a tensioning seat 122; the top end surface of the tensioning seat 122 is symmetrically and fixedly connected with two tensioning rings 123; the two tensioning rings 123 are aligned with the positions of the two threading blocks 121 respectively, thereby the threading blocks 121 are driven to lift through the lifting of the auxiliary sliding seat 118, the cutting height of the foam is adjusted through the lifting of the threading blocks 121, after the cutting height of the foam is adjusted, the electric heating wire penetrates through the tensioning ring 123 on one side, then the electric heating wire penetrates through the two threading blocks 121 through the threading holes, finally the tail end of the electric heating wire is wound on the tensioning ring 123 on the other side to tension the electric heating wire, the foam is cut through the electric heating wire between the two threading blocks 121 in the process of pushing the foam, and then the height of the electric heating wire is adjusted through the lifting of the threading blocks 121, so that the foam cutting pushing table can cut the foam with different heights, and the practicability of the foam cutting pushing table is increased.

Further, according to the embodiment of the present utility model, as shown in fig. 3, a first driving motor 107 is screw-fastened to the left portion of the rear end surface of the fixing frame 103; the front end surface of the first driving motor 107 is coaxially connected with a control screw 108; the control screw 108 is arranged in the left guide chute 105; a guide slide bar 106 is fixedly connected in the right guide slide groove 105; a guide slide seat 109 is connected between the two guide slide grooves 105 in a sliding way; the control screw 108 is screwed into the left part of the guide slide 109; the guide slide bar 106 is slidably connected to the right portion of the guide slide 109, so that the first driving motor 107 is started to drive the control screw 108 to rotate, and the guide slide 109 is driven to move by the rotation of the control screw 108, and the guide slide bar 106 provides guidance for the guide slide 109 in the process of moving the guide slide 109.

Furthermore, according to the embodiment of the present utility model, as shown in fig. 3 and 4, a first hydraulic ram 110 is fixedly connected centrally in the guide slide 109; the bottom end surface of the first hydraulic push rod 110 is fixedly connected with a pressing disc 111; two second hydraulic push rods 112 are symmetrically and fixedly connected in the guide slide seat 109; the bottom end surfaces of the two second hydraulic push rods 112 are fixedly connected with a positioning ring 113; a third hydraulic push rod 114 is fixedly connected in each of the two positioning rings 113; the tail ends of the two third hydraulic push rods 114 are fixedly connected with a positioning clamping plate 115; the top end surface of the fixed plate 1 is fixedly connected with a pushing table surface 124; the pushing table top 124 is of a rectangular block structure made of glass, so that when the foam is cut, the foam to be cut is placed on the pushing table top 124, the second hydraulic push rod 112 is started to drive the positioning ring 113 to move downwards until the third hydraulic push rod 114 is aligned with the position of the foam to be cut, at the moment, the third hydraulic push rods 114 are started, the two third hydraulic push rods 114 simultaneously push the positioning clamping plates 115 to move inwards, the foam to be cut is aligned through the middle movement of the two positioning clamping plates 115 and is transversely limited, then the first hydraulic push rod 110 is started, the first hydraulic push rod 110 drives the pressing disc 111 to move downwards to longitudinally limit the foam to be cut, the foam to be cut is prevented from being offset in the process of pushing the foam to be cut, the cutting yield of the foam is effectively improved, the friction force between the foam and the pushing table top 124 is effectively reduced, and the damage to the foam due to friction can be reduced when the foam is pushed conveniently.

Furthermore, according to the embodiment of the present utility model, as shown in fig. 1 and 5, one exhaust fan 126 is fixedly installed in the lower portion of each of the two purifying tanks 125; an activated carbon filter screen 127 is fixedly arranged in the upper parts of the two purifying boxes 125; the two activated carbon filter screens 127 are aligned with the positions of the two suction fans 126 respectively; an exhaust pipe 128 is fixedly connected to the top end surfaces of the two purifying boxes 125 in the middle; the rear end surfaces of the two purifying boxes 125 are fixedly connected with a gas pipe 129; two auxiliary plates 131 are symmetrically and fixedly connected to the rear part of the bottom end surface of the fixing frame 103; the two air delivery pipes 129 are fixedly connected in the two auxiliary plates 131 respectively; the end of two air pipes 129 is all fixedly connected with air collecting hopper 130 to at the in-process of cutting the foam, start air exhauster 126, make air exhauster 126 collect the waste gas that produces when heating wire cutting foam through air collecting hopper 130, the waste gas of collecting passes through air pipe 129 and gets into purifying box 125 in, the waste gas in the purifying box 125 passes through air pipe 129 after the filtration of active carbon filter screen 127 and discharges, the waste gas that produces when preventing the heating wire cutting foam causes the pollution to the air around the foam cutting pushing bench, effectually guaranteed staff's healthy.

Specific use and action of the embodiment:

in the process of using the utility model, when the foam is cut, the foam to be cut is placed on the pushing table top 124, the second hydraulic push rod 112 is started to drive the positioning ring 113 to move downwards until the third hydraulic push rod 114 is aligned with the position of the foam to be cut, at the moment, the third hydraulic push rod 114 is started, the two third hydraulic push rods 114 simultaneously push the positioning clamping plates 115 to move inwards, the foam to be cut is aligned through the forward movement of the two positioning clamping plates 115 and is transversely limited, then the first hydraulic push rod 110 is started, the first hydraulic push rod 110 drives the pressing plate 111 to move downwards to longitudinally limit the foam to be cut, the foam to be cut is prevented from deviating in the process of pushing and cutting, the cutting yield of the foam is effectively improved, the second driving motor 119 is started to drive the lifting screw rod 120 to rotate, the auxiliary sliding seat 118 to slide in the auxiliary groove 117 in the process of rotating the lifting screw rod 120, the auxiliary sliding seat 118 is enabled to lift in the auxiliary groove 117 through the rotation of the lifting screw rod 120, the lifting threading block 121 is enabled to drive the heating wire to stretch the heating wire, the heating wire through the two side of the lifting block 121, the heating wire through the two side of the heating wire tensioning block 121 is threaded through the height of the heating wire, the two side of the foam tensioning block 121 is adjusted, the height of the heating wire is adjusted through the end of the heating wire is adjusted, the end of the foam is cut through the height of the heating wire, the end of the heating wire is stretched through the wire tensioning block 121, the end of the end is stretched through the heating wire, and the end of the wire is stretched through the wire, and the wire is stretched up and the wire, and the end is stretched up and the wire is stretched, make foam cutting pushing bench can cut the foam of not co-altitude, increase the practicality of foam cutting pushing bench, start first driving motor 107 drive control screw 108 and rotate, drive direction slide 109 through the rotation of control screw 108 and remove, at the in-process that direction slide 109 removed, direction slide 106 can provide the direction for direction slide 109, promote the foam through the removal of direction slide 109 and remove the cutting, in the in-process that cuts the foam, start air exhauster 126, make air exhauster 126 collect the waste gas that produces when the heating wire cutting foam through wind collecting hopper 130, the waste gas of collecting passes through air pipe 129 and gets into purifying box 125 in, exhaust in the purifying box 125 passes through air pipe 129 after filtering through active carbon filter screen 127, the waste gas that produces when preventing the heating wire cutting foam causes the pollution to the air around the foam cutting pushing bench, the effectual health of guaranteeing the staff.

Claims

1. Foam cutting pushing bench, its characterized in that includes: a fixed plate (1); the bottom end of the fixed plate (1) is in a rectangular array shape and is fixedly connected with four supporting frames (101); four connecting columns (102) are fixedly connected to the outer wall of the fixed plate (1) in a central array shape; the four connecting columns (102) are aligned with the positions of the four supporting frames (101) respectively; the top end surfaces of the four connecting columns (102) are fixedly connected with a fixing frame (103); a sliding groove (104) is formed in the middle of the top end surface of the fixing frame (103) in a penetrating mode; a guide chute (105) is formed in the middle of the left end face of the sliding groove (104) and the right end face of the sliding groove (104); the positions of the two guide sliding grooves (105) are aligned; two purifying boxes (125) are symmetrically and fixedly connected to the rear part of the outer wall of the fixing frame (103); two mounting seats (116) are symmetrically and fixedly connected to the rear part of the outer wall of the fixing plate (1).

2. The foam cutting pushing table of claim 1, wherein: an auxiliary groove (117) is formed in the middle of the inner sides of the two mounting seats (116); the top end surfaces of the two mounting seats (116) are fixedly connected with a second driving motor (119) through bolts; the bottom end surfaces of the two second driving motors (119) are coaxially connected with a lifting screw rod (120); the tail ends of the two lifting screws (120) are respectively and rotatably connected to the bottom end surfaces of the two auxiliary grooves (117); an auxiliary sliding seat (118) is connected on the outer walls of the two lifting screws (120) in a threaded manner; two auxiliary sliding seats (118) are respectively and slidably connected in the two auxiliary grooves (117).

3. The foam cutting pushing table of claim 2, wherein: the rear end surfaces of the two auxiliary sliding seats (118) are fixedly connected with a threading block (121); the left end surfaces of the two threading blocks (121) are respectively provided with a threading hole in a penetrating way in the middle; the rear part of the bottom end surface of the fixed plate (1) is fixedly connected with a tensioning seat (122); two tightening rings (123) are symmetrically and fixedly connected to the top end surface of the tightening seat (122); the two tightening rings (123) are aligned with the positions of the two threading blocks (121), respectively.

4. The foam cutting pushing table of claim 1, wherein: the left part of the rear end surface of the fixing frame (103) is fixedly connected with a first driving motor (107) through bolts; the front end surface of the first driving motor (107) is coaxially connected with a control screw (108); the control screw (108) is arranged in the left guide chute (105); a guide slide bar (106) is fixedly connected in the right guide slide groove (105); a guide sliding seat (109) is connected between the two guide sliding grooves (105) in a sliding way; the control screw (108) is in threaded connection with the left part of the guide slide seat (109); the guide slide bar (106) is slidingly connected in the right part of the guide slide seat (109).

5. The foam cutting pushing table of claim 4, wherein: a first hydraulic push rod (110) is fixedly connected in the guide sliding seat (109) in the middle; the bottom end surface of the first hydraulic push rod (110) is fixedly connected with a pressing disc (111); two second hydraulic push rods (112) are symmetrically and fixedly connected in the guide sliding seat (109); the bottom end surfaces of the two second hydraulic push rods (112) are fixedly connected with a positioning ring (113); a third hydraulic push rod (114) is fixedly connected in each of the two positioning rings (113); the tail ends of the two third hydraulic push rods (114) are fixedly connected with a positioning clamping plate (115); the top end surface of the fixed plate (1) is fixedly connected with a pushing table top (124); the pushing table (124) is a rectangular block structure made of glass.

6. The foam cutting pushing table of claim 1, wherein: an exhaust fan (126) is fixedly arranged in the lower parts of the two purifying boxes (125); an active carbon filter screen (127) is fixedly arranged in the upper parts of the two purifying boxes (125); the two active carbon filter screens (127) are aligned with the positions of the two exhaust fans (126) respectively; the top end surfaces of the two purifying boxes (125) are fixedly connected with an exhaust pipe (128) in the middle; the rear end surfaces of the two purifying boxes (125) are fixedly connected with a gas pipe (129); two auxiliary plates (131) are symmetrically and fixedly connected to the rear part of the bottom end surface of the fixing frame (103); the two air delivery pipes (129) are respectively and fixedly connected in the two auxiliary plates (131); the tail ends of the two air delivery pipes (129) are fixedly connected with an air collecting hopper (130).