CN112591396A

CN112591396A - Cement conveyor for construction based on dust fall mechanism

Info

Publication number: CN112591396A
Application number: CN202011420715.4A
Authority: CN
Inventors: 葛红玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-04-02

Abstract

The invention relates to the technical field of cement conveying, in particular to a cement conveying device for building construction based on a dust falling mechanism. It includes the supporting seat and installs the conveying mechanism in the supporting seat top, in this cement conveyor for construction based on dust fall mechanism, the transport case of setting, through motor work, be convenient for carry the pole to rotate, make and carry the inside cement of chamber to carry to drive to carry the spiral leaf and carry work, the dust collector of setting, insufflate dust removal incasement portion with wind by the vent through hair-dryer work, the power through wind, it gets into dust removal incasement portion by the apron fluting to drive transport intracavity portion dust, then discharge, thereby play the suction box of the effect setting of dust fall, through air exhauster work, can be to the inside convulsions of dust removal chamber, wind-force produces external suction, the suction effect runs through inside sack and the conveyer pipe dust entering sack of bleeding to dust removal incasement portion, be convenient for improve the collection efficiency of sack, the work of dust fall is accelerated.

Description

Cement conveyor for construction based on dust fall mechanism

Technical Field

The invention relates to the technical field of cement conveying, in particular to a cement conveying device for building construction based on a dust falling mechanism.

Background

Cement is frequently used on the building site, and the produced cement needs to be conveyed in the use process of the cement;

at present, the conveying mechanism of cement generally is the transportation under the open-air state, and the dust on the bottom surface is mixed easily when leading to the transportation, influences the cement quality, and simultaneously, cement makes magazines such as inside not totally mixed get into the air easily, influences the air quality, causes harm to human health in carrying the engineering, consequently, needs a neotype cement conveyor to improve prior art not enough.

Disclosure of Invention

The invention aims to provide a cement conveying device for building construction based on a dust falling mechanism, and the cement conveying device is used for solving the problems in the background technology.

In order to achieve the above object, the present invention provides a cement conveying device for building construction based on a dust falling mechanism, which comprises a supporting seat and a conveying mechanism installed above the supporting seat, wherein the conveying mechanism at least comprises:

the conveying box is internally provided with a conveying cavity, the conveying cavity is internally connected with a conveying rod, the rear end of the conveying cavity is provided with a rear rotating head, the front end of the conveying cavity is provided with a front rotating head, the front end of the conveying rod is rotatably connected with the front rotating head, the rear end of the conveying rod is rotatably connected with the rear rotating head, the surface of the conveying rod is provided with a conveying spiral blade, the conveying rod can conveniently rotate, the conveying spiral blade drives cement in the conveying cavity to carry out conveying work, the centers of the rear rotating head and the front rotating head are positioned on the same axis, the conveying rod can conveniently horizontally rotate, the conveying work of the cement is facilitated, and the bottom of the front end of the conveying cavity is provided with a discharge port, so that the cement can be conveniently discharged;

the dust removal device comprises a cover plate, the cover plate is fixed above the conveying box, so that a conveying cavity can be conveniently closed during cement transportation, a dust removal box is fixed above the cover plate, a cover plate groove is formed in the cover plate and positioned between the dust removal boxes, a blower is arranged at the rear end of the upper surface of the cover plate, a vent is formed in the rear end of the dust removal box, the air outlet end of the blower is fixedly connected with the vent, dust outlets are formed in two sides of the front end of the dust removal box, wind is blown into the dust removal box through the vent by the operation of the blower, and dust in the inner part of the conveying cavity is driven to enter the dust removal box through the cover plate groove and then is discharged through the dust outlets by the action of the wind, so that the dust removal effect is achieved;

the dust collection box, the inside suction chamber of having seted up of suction box, the dust import has been seted up to suction chamber top one side, suction box top one side with dust removal case front end side fixed connection, just the dust import with the switch-on of dust export, the dust of the dust removal incasement portion of being convenient for gets into to the suction intracavity portion, the suction intracavity portion is equipped with collection device, collection device includes the conveyer pipe, conveyer pipe one end with the dust import is fixed, the conveyer pipe bottom is connected with the sack, is convenient for collect the dust.

Conveying mechanism when specifically using in this embodiment, pour cement into by carrying chamber rear end opening part, it rotates as the axle to drive the straight line between the pole turn round after and the preceding head of transport through drive arrangement, the pole of transport rotates and drives the transport spiral leaf, can order about cement through the rotation of carrying the spiral leaf and move forward, then, with hair-dryer switch-on, hair-dryer work is bloied to dust removal incasement portion, when wind is through the apron fluting, can form suction to the transport intracavity portion, suction effect drives the dust and is discharged by the apron fluting, along with the wind force forward motion, when dust removes to dust removal case front end, the dust bits export through dust removal case both sides gets into to inside the conveyer pipe, transport function through the conveyer pipe, transmit the dust to the sack inside and collect, accomplish the cement of dust fall work, discharge can through the feed opening.

As a further improvement of the technical scheme, the rear end of the conveying box is provided with a mounting seat, the upper surface of the mounting seat is provided with a motor, the rear end of the conveying rod penetrates through the rear rotating head and the output shaft of the motor, the conveying rod is driven to work conveniently through the motor, and the effect of improving the efficiency is achieved.

As a further improvement of the technical scheme, the bottom end of the conveying pipe is provided with a threaded head, the top end of the cloth bag is provided with a connecting block, a threaded groove is formed in the connecting block, the threaded head is in threaded connection with the threaded groove, the cloth bag is convenient to disassemble, and dust treatment is facilitated.

As the further improvement of this technical scheme, dust absorption chamber bottom is located the below of sack is equipped with the ventilation piece, the ventilation piece internally mounted has the air exhauster, through the air exhauster work, can be to the inside convulsions of dust absorption chamber, and wind-force produces external suction, and inside suction effect run through sack and conveyer pipe and bleed the dust to dust removal incasement portion and get into the sack, is convenient for improve the collection efficiency of sack, the work of dust fall with higher speed.

As a further improvement of the technical scheme, both ends of the upper surface of the supporting seat are provided with supporting legs, the top ends of the supporting legs are fixedly connected with supporting frames, and the conveying box is located on the upper surface of the supporting frames, so that the conveying box is supported, and the effect of stabilizing the conveying mechanism is achieved.

As a further improvement of the technical scheme, the left end and the right end of the supporting frame are respectively provided with a stabilizing rod, the stabilizing rods are provided with a plurality of parts, and the surfaces of the stabilizing rods are attached to the side surfaces of the conveying boxes, so that the supporting conveying boxes are stabilized conveniently.

As a further improvement of the technical scheme, a fixed seat is arranged at the rear end of the supporting seat, and the installation seat is positioned on the upper surface of the fixed seat, so that the motor is conveniently supported.

As a further improvement of the technical scheme, threaded holes are formed in two ends of the upper surface of the fixing seat, mounting pieces are arranged at two ends of the mounting seat, threaded through holes are formed in the surfaces of the mounting pieces, threaded connection is formed between the threaded through holes and the threaded holes, and the motor is convenient to stabilize through connection between the mounting seat and the fixing seat, so that the motor is prevented from shaking violently during working.

As a further improvement of the technical scheme, the top end of the stabilizing rod is provided with a connecting hole, the side surface of the conveying box is provided with a fixing block, a fixing hole is formed in the fixing block, a fixing rod is inserted into the fixing hole and the connecting hole, one end of the fixing rod is provided with a threaded ring, the surface of the threaded ring is in threaded connection with a nut, the stabilizing rod and the fixing block are connected, the supporting seat and the conveying box are fixed conveniently, and the stability of the conveying box during operation is improved.

As a further improvement of the technical scheme, a door is hinged to one side of the dust collection box, so that the dust collection cavity is conveniently sealed, a closing block is arranged at one end of the door, a closing block jack is arranged inside the closing block, a fastening block is arranged at one end of the dust collection box, a fastening block groove is arranged inside the fastening block, a groove jack is arranged inside the fastening block groove, the closing block is located inside the fastening block groove, a bolt is inserted between the groove jack and the closing block jack, and the door and the dust collection box are conveniently and stably connected through the connection between the fastening block and the door.

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

1. in this cement conveyor for construction based on dust fall mechanism, the transport case of setting through motor work, is convenient for carry the pole to rotate, makes to carry the spiral leaf and drives and carry the inside cement of intracavity and carry work.

2. In this cement conveyor for construction based on dust fall mechanism, the dust collector of setting is convenient for carry the chamber when cement transportation to close, blows in dust removal incasement portion with wind by the vent through hair-dryer work, and through the power of wind, the drive is carried intracavity portion dust and is got into dust removal incasement portion by the apron fluting, then discharges to play the effect of dust fall.

3. In this cement conveyor for construction based on dust fall mechanism, the suction box of setting through air exhauster work, can be to the inside convulsions of dust removal chamber, and wind-force produces external suction, and inside suction effect run through sack and conveyer pipe to the dust removal incasement portion dust entering sack of bleeding, is convenient for improve the collection efficiency of sack, the work of dust fall with higher speed.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a schematic view of the structure of a conveying mechanism according to embodiment 1;

FIG. 3 is a schematic view of the construction of a conveyance case according to embodiment 1;

FIG. 4 is a schematic view of the structure of a transfer chamber in accordance with embodiment 1;

FIG. 5 is a schematic view of the construction of a feed rod according to embodiment 1;

FIG. 6 is a schematic view of the dust removing device of embodiment 1;

FIG. 7 is a schematic view of the structure of the cover plate according to embodiment 1;

FIG. 8 is a schematic view of the structure of the dust box of embodiment 1;

FIG. 9 is a schematic view showing an internal structure of a dust box according to embodiment 1;

FIG. 10 is a schematic view of the structure of the dust collecting chamber in embodiment 1;

FIG. 11 is a schematic view of the structure of a collecting apparatus according to embodiment 1;

fig. 12 is a schematic view of a support seat structure in embodiment 1;

FIG. 13 is a schematic view of the structure of the mount of embodiment 1;

FIG. 14 is a schematic view showing the structure of a stabilization rod according to embodiment 1;

FIG. 15 is a schematic view of the door structure of embodiment 1;

fig. 16 is a schematic structural view of a fastening block of embodiment 1.

The various reference numbers in the figures mean:

100. a conveying mechanism;

110. a delivery box; 1100. a delivery lumen; 1101. turning the head; 1102. front turning; 1103. a feeding port;

111. a conveying rod; 1111. conveying the spiral blade;

112. a mounting seat; 1121. a motor; 113. mounting a sheet; 1130. a threaded through hole; 1131. a screw;

114. a fixed block; 1140. a fixing hole; 1141. fixing the rod; 1142. a thread ring; 1143. a nut;

120. a dust removal device;

121. a cover plate; 1210. slotting the cover plate;

122. a dust removal box; 1220. a dust outlet; 1221. a vent; 123. a blower;

130. a dust collection box; 1300. a dust suction chamber; 1301. a dust inlet; 1302. a ventilation block; 1303. an exhaust fan;

131. a collection device; 1311. a delivery pipe; 1312. a cloth bag; 1313. a screw head; 1314. connecting blocks; 1315. a thread groove;

132. a fastening block; 1320. a fastening block groove; 1321. a groove jack; 1322. a bolt;

140. a box door; 141. a closing block; 1410. closing the block jack;

200. a supporting seat; 201. supporting legs;

210. a support frame; 211. a stabilizing rod; 2110. connecting holes;

220. a fixed seat; 2200. a threaded bore.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1

Referring to fig. 1 to 16, the present embodiment provides a cement conveying device for building construction based on a dust falling mechanism, including a supporting seat 200 and a conveying mechanism 100 installed above the supporting seat 200, where the conveying mechanism 100 at least includes:

the conveying box 110 is provided with a conveying cavity 1100 inside the conveying box 110, a conveying rod 111 is connected inside the conveying cavity 1100, a rear rotating head 1101 is arranged at the rear end of the conveying cavity 1100, a front rotating head 1102 is arranged at the front end of the conveying cavity 1100, the front end of the conveying rod 111 is rotatably connected with the front rotating head 1102, the rear end of the conveying rod 111 is rotatably connected with the rear rotating head 1101, a conveying spiral blade 1111 is arranged on the surface of the conveying rod 111 and is convenient for the conveying rod 111 to rotate, so that the conveying spiral blade 1111 drives cement inside the conveying cavity 1100 to perform conveying work, the circle centers of the rear rotating head 1101 and the front rotating head 1102 are positioned on the same axis, the conveying rod 111 is convenient to horizontally rotate, the conveying work of the cement is facilitated, and a blanking port 1103 is formed in the bottom of the front end;

the dust removal device 120 comprises a cover plate 121, the cover plate 121 is fixed above the conveying box 110, so that the conveying cavity 1100 is closed conveniently during cement transportation, a dust removal box 122 is fixed above the cover plate 121, a cover plate slot 1210 is formed in the cover plate 121 and located between the dust removal boxes 122, a blower 123 is arranged at the rear end of the upper surface of the cover plate 121, a vent 1221 is formed in the rear end of the dust removal box 122, the air outlet end of the blower 123 is fixedly connected with the vent 1221, dust outlets 1220 are formed in two sides of the front end of the dust removal box 120, wind is blown into the dust removal box 122 from the vent 1221 through the work of the blower 123, and dust in the conveying cavity 1100 is driven to enter the dust removal box 122 through the cover plate slot 1210 and then is discharged through the dust outlets 1220, so that the dust removal effect is achieved;

suction box 130, suction box 130 is inside to have seted up suction chamber 1300, suction chamber 1300 top one side has seted up the dirt import 1301, suction box 130 top one side and dust removal case 122 front end side fixed connection, and dirt import 1301 and the switch-on of dirt export 1220, the inside dust of dust removal case 122 of being convenient for enters into to inside the suction chamber 1300, the inside collection device 131 that is equipped with of suction chamber 1300, collection device 131 includes conveyer pipe 1311, conveyer pipe 1311 one end is fixed with dirt import 1301, the conveyer pipe 1311 bottom is connected with sack 1312, be convenient for collect the dust.

In the embodiment, when the conveying mechanism 100 is used specifically, cement is poured from the opening at the rear end of the conveying cavity 1100, the driving device drives the conveying rod 111 to rotate by taking a straight line between the rear rotary head 1101 and the front rotary head 1102 as an axis, the conveying rod 111 rotates to drive the conveying spiral blade 1111, the cement is driven to move forwards by the rotation of the conveying spiral blade 1111, at this time, the blower 123 is powered on, the blower 123 works to blow air to the inside of the dust removing box 122, when wind passes through the cover plate slot 1210, suction force is formed inside the conveying cavity 1100, the suction force drives dust to be discharged from the cover plate slot 1210, the dust moves forwards along with the wind force, when the dust moves to the front end of the dust removing box 122, enters the conveying pipe 1311 through the dust outlets 1220 at both sides of the dust removing box 122, through the transport function of conveyer pipe 1311, transmit the dust to the inside collection of sack 1312, the cement of accomplishing dust fall work can through feed opening 1103 discharge.

Further, the rear end of the conveying box 110 is provided with an installation base 112, a motor 1121 is installed on the upper surface of the installation base 112, the rear end of the conveying rod 111 penetrates through the rear rotating head 1101 and is fixedly connected with an output shaft of the motor 1121, the motor 1121 works, the conveying rod 111 is conveniently driven to work, and the effect of improving efficiency is achieved.

Specifically, the bottom end of the conveying pipe 1311 is provided with a threaded head 1313, the top end of the cloth bag 1312 is provided with a connecting block 1314, a threaded groove 1315 is formed in the connecting block 1314, the threaded head 1313 is in threaded connection with the threaded groove 1315, the cloth bag 1312 is convenient to disassemble, and dust treatment is facilitated.

In addition, the bottom end of the dust suction cavity 1300 is provided with a ventilation block 1302 below the cloth bag 1312, an exhaust fan 1303 is arranged inside the ventilation block 1302, the exhaust fan 1303 works to exhaust air inside the dust suction cavity 1300, wind power generates external suction force, suction force penetrates through the cloth bag 1312 and the conveying pipe 1311, air-extracted dust inside the dust removal box 122 enters the cloth bag 1312, collection efficiency of the cloth bag 1312 is improved conveniently, and dust removal work is accelerated.

In addition, supporting seat 200 upper surface both ends all are equipped with supporting leg 201, and supporting leg 201 top fixedly connected with support frame 210, delivery box 110 are located the upper surface of support frame 210, are convenient for support delivery box 110, have played the effect of firm conveying mechanism 100.

Further, both ends all are equipped with firm pole 211 about support frame 210, and firm pole 211 is equipped with a plurality of, and firm pole 211 surface and the laminating of delivery box 110 side surface are convenient for stabilize the delivery box 110 that supports.

Specifically, the rear end of the supporting seat 200 is provided with a fixing seat 220, and the mounting seat 112 is located on the upper surface of the fixing seat 220, so as to support the motor 1121 conveniently.

In addition, threaded hole 2200 is all seted up at fixing base 220 upper surface both ends, and mount pad 112 both ends all are equipped with installation piece 113, and threaded through-hole 1130 is seted up on the 113 surface of installation piece, and threaded connection has screw rod 1131 between threaded through-hole 1130 and the threaded hole 2200, through the connection between mount pad 112 and the fixing base 220, is convenient for stabilize motor 1121, avoids its during operation acutely to rock.

In addition, connecting hole 2110 is opened at the top end of stabilizing rod 211, fixing block 114 is arranged on the side surface of conveying box 110, fixing hole 1140 is opened inside fixing block 114, fixing rod 1141 is inserted into fixing hole 1140 and connecting hole 2110, screw ring 1142 is arranged at one end of fixing rod 1141, nut 1143 is connected to the surface of screw ring 1142 in a threaded manner, and by connecting stabilizing rod 211 and fixing block 114, fixing between supporting seat 200 and conveying box 110 is facilitated, and the stability of conveying box 110 during operation is improved.

Further, dust collection box 130 one side articulates there is chamber door 140, be convenient for seal dust absorption chamber 1300, chamber door 140 one end is equipped with closing piece 141, closing piece 141 is inside to be seted up closing piece jack 1410, dust collection box 130 one end is equipped with fastening block 132, fastening block recess 1320 has been seted up to fastening block 132 inside, inside recess jack 1321 of having seted up of fastening block recess 1320, closing piece 141 is located inside fastening block recess 1320, and it has bolt 1322 to peg graft between recess jack 1321 and the closing piece jack 1410, through the connection between fastening block 132 and the chamber door 140, be convenient for stabilize between chamber door 140 and the dust collection box 130.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Cement conveyor for construction based on dust fall mechanism, its characterized in that: including supporting seat (200) and install conveying mechanism (100) above supporting seat (200), conveying mechanism (100) include at least:

the conveying box (110), a conveying cavity (1100) is formed in the conveying box (110), a conveying rod (111) is connected to the conveying cavity (1100), a rear rotating head (1101) is arranged at the rear end of the conveying cavity (1100), a front rotating head (1102) is arranged at the front end of the conveying cavity (1100), the front end of the conveying rod (111) is rotatably connected with the front rotating head (1102), the rear end of the conveying rod (111) is rotatably connected with the rear rotating head (1101), conveying spiral blades (1111) are arranged on the surface of the conveying rod (111), the centers of the rear rotating head (1101) and the front rotating head (1102) are located on the same axis, and a discharging port (1103) is formed in the bottom of the front end of the conveying cavity (1100);

the dust removal device (120) comprises a cover plate (121), the cover plate (121) is fixed above the conveying box (110), a dust removal box (122) is fixed above the cover plate (121), a cover plate slot (1210) is formed in the position, located between the dust removal boxes (122), of the cover plate (121), a blower (123) is arranged at the rear end of the upper surface of the cover plate (121), a vent (1221) is formed in the rear end of the dust removal box (122), the air outlet end of the blower (123) is fixedly connected with the vent (1221), and dust outlets (1220) are formed in two sides of the front end of the dust removal box (122);

dust suction box (130), dust suction chamber (1300) have been seted up to dust suction box (130) inside, dust import (1301) have been seted up to dust suction chamber (1300) top one side, dust suction box (130) top one side with dust removal box (122) front end side fixed connection, just dust import (1301) with dust export (1220) switch-on, dust suction chamber (1300) inside is equipped with collection device (131), collection device (131) are including conveyer pipe (1311), conveyer pipe (1311) one end with dust import (1301) are fixed, conveyer pipe (1311) bottom is connected with sack (1312).

2. The construction cement conveying device based on the dust fall mechanism according to claim 1, characterized in that: the rear end of the conveying box (110) is provided with an installation seat (112), the upper surface of the installation seat (112) is provided with a motor (1121), and the rear end of the conveying rod (111) penetrates through the rear rotary head (1101) and is fixedly connected with an output shaft of the motor (1121).

3. The construction cement conveying device based on the dust fall mechanism according to claim 1, characterized in that: the bottom end of the conveying pipe (1311) is provided with a threaded head (1313), the top end of the cloth bag (1312) is provided with a connecting block (1314), a threaded groove (1315) is formed in the connecting block (1314), and the threaded head (1313) is in threaded connection with the threaded groove (1315).

4. The construction cement conveying device based on the dust fall mechanism according to claim 1, characterized in that: the bottom end of the dust suction cavity (1300) is positioned below the cloth bag (1312), a ventilation block (1302) is arranged below the cloth bag (1312), and an exhaust fan (1303) is arranged inside the ventilation block (1302).

5. The construction cement conveying device based on the dust fall mechanism according to claim 1, characterized in that: supporting legs (201) are arranged at two ends of the upper surface of the supporting seat (200), a supporting frame (210) is fixedly connected to the top ends of the supporting legs (201), and the conveying box (110) is located on the upper surface of the supporting frame (210).

6. The construction cement conveying device based on the dust fall mechanism according to claim 5, characterized in that: both ends all are equipped with firm pole (211) about support frame (210), firm pole (211) are equipped with a plurality of, firm pole (211) surface with delivery box (110) side surface laminating.

7. The construction cement conveying device based on the dust fall mechanism according to claim 2, characterized in that: the rear end of the supporting seat (200) is provided with a fixed seat (220), and the mounting seat (112) is located on the upper surface of the fixed seat (220).

8. The construction cement conveying device based on the dust fall mechanism according to claim 7, characterized in that: threaded holes (2200) are formed in two ends of the upper surface of the fixing seat (220), mounting pieces (113) are arranged at two ends of the mounting seat (112), threaded through holes (1130) are formed in the surfaces of the mounting pieces (113), and a screw rod (1131) is connected between each threaded through hole (1130) and each threaded hole (2200) in a threaded mode.

9. The construction cement conveying device based on the dust fall mechanism according to claim 6, characterized in that: the top end of the stabilizing rod (211) is provided with a connecting hole (2110), the side surface of the conveying box (110) is provided with a fixing block (114), a fixing hole (1140) is formed in the fixing block (114), the fixing hole (1140) and the connecting hole (2110) are internally inserted with a fixing rod (1141), one end of the fixing rod (1141) is provided with a threaded ring (1142), and the surface of the threaded ring (1142) is in threaded connection with a nut (1143).

10. The construction cement conveying device based on the dust fall mechanism according to claim 1, characterized in that: one side of the dust collection box (130) is hinged with a box door (140), one end of the box door (140) is provided with a closing block (141), a closing block jack (1410) is arranged inside the closing block (141), one end of the dust collection box (130) is provided with a fastening block (132), a fastening block groove (1320) is arranged inside the fastening block (132), a groove jack (1321) is arranged inside the fastening block groove (1320), the closing block (141) is located inside the fastening block groove (1320), and a bolt (1322) is inserted between the groove jack (1321) and the closing block jack (1410).