CN221403711U - Reagent belt cleaning device is used in chemical examination of power plant's fuel coal matter - Google Patents

Abstract

The utility model discloses a reagent cleaning device for testing fuel coal quality of a power plant, which relates to the technical field of coal quality testing and comprises a cleaning table, wherein supporting frames are symmetrically arranged at two ends of the top of the cleaning table, a first servo motor is arranged at the top end of each supporting frame in a penetrating mode, a threaded rod is connected to the output end of the first servo motor, and auxiliary components are sleeved on the circumferential outer wall of each threaded rod. The fixing device is reasonable and reliable in structure and simple to operate, can drive the reagent bottles on the fixing plate to reciprocate by one hundred eighty degrees under the action of the auxiliary assembly, can quickly and uniformly dry the reagent bottles, can fix the reagent bottles in a multidirectional centering manner under the action of the fixing assembly, and can also meet the clamping and fixing work of the reagent bottles with different calibers, so that the applicability is wider.

Description

Reagent belt cleaning device is used in chemical examination of power plant's fuel coal matter

Technical Field

The utility model relates to the technical field of coal quality assay, in particular to a reagent cleaning device for power plant fuel coal quality assay.

Background

The coal assay is the assay analysis of the properties of fixed carbon, sulfur, phosphorus, calorific value, colloid layer index, bonding index, total moisture, analysis base moisture, ash content, volatile matters and the like of coal, and commonly used tests generally comprise a moisture content test, an ash content test, a volatile matter test, a sulfur content test, a heat value test and the like. The current reagent belt cleaning device for fuel coal quality chemical examination of power plant is in the cleaning process to the reagent bottle, is inconvenient to the diversified centering of reagent bottle fixed, causes the reagent bottle skew easily to can remain harmful gas in the reagent bottle after the chemical examination, like sulfur dioxide, carbon monoxide and nitrogen oxide etc. are inconvenient to handle harmful gas, in the stoving in-process, are inconvenient quick even just dry to the reagent bottle itself, influence experimental efficiency.

For example, chinese patent CN216324030U discloses a reagent belt cleaning device for chemical examination of power plant's fuel coal quality, including the brace table, the top fixedly connected with wiper mechanism of brace table, wiper mechanism's both sides are provided with the support frame, the top fixedly connected with stoving mechanism of support frame is connected with the mount between the support frame, the front side of mount is connected with the threaded rod, the one end of threaded rod is connected with the splint, has seted up the clamp groove on the mount, the splint sets up in the clamp groove, the both ends of mount are connected with lead screw and guide bar respectively.

The reagent cleaning device for the fuel coal quality assay of the power plant has the following defects: although through being equipped with wiper mechanism, can carry out solitary washing to the reagent bottle, can collect sewage after wasing simultaneously, prevent that each reagent from taking place to mix, the treatment of the sewage of being convenient for is through being equipped with stoving mechanism, after wasing the completion, rises stoving mechanism with the mount in, dries the reagent bottle through infrared ray stoving lamp. But be inconvenient for fixing reagent bottle diversified centering, cause reagent bottle skew easily to can remain harmful gas in the reagent bottle after the chemical examination, like sulfur dioxide, carbon monoxide and nitrogen oxide etc. be inconvenient for handling harmful gas, in the stoving in-process, be inconvenient for quick to reagent bottle itself just dry, influence experimental efficiency.

For the problems in the related art, no effective solution has been proposed at present.

Disclosure of utility model

(One) solving the technical problems

Aiming at the defects of the prior art, the utility model provides the reagent cleaning device for the fuel coal assay of the power plant, which has the advantages that the reagent bottle can be clamped and fixed in a multidirectional centering manner, the reagent bottle can be dried rapidly and uniformly, and the residual harmful gas in the reagent bottle can be treated, so that the problems that the reagent bottle is fixed in a multidirectional centering manner, the reagent bottle is easy to deviate, harmful gas such as sulfur dioxide, carbon monoxide, nitrogen oxide and the like can be remained in the assayed reagent bottle, the harmful gas is inconvenient to treat, the reagent bottle is inconvenient to dry rapidly and uniformly in the drying process, and the experimental efficiency is affected are solved.

(II) technical scheme

In order to realize the advantages that the reagent bottle can be rapidly and uniformly dried while being clamped and fixed in a multidirectional centering manner, and the residual harmful gas in the reagent bottle can be treated, the utility model adopts the following specific technical scheme:

The utility model provides a reagent belt cleaning device for chemical examination of power plant's fuel coal quality, including the cleaning platform, the top both ends symmetry of cleaning platform is provided with the support frame, the top of support frame is all run through and is provided with servo motor one, servo motor one's output all is connected with the threaded rod, the circumference outer wall of threaded rod all overlaps and is equipped with auxiliary assembly, be connected with the fixed plate between the one end of two auxiliary assembly, a plurality of mounting grooves have been seted up on the top of fixed plate, inside one side wall of mounting groove all is provided with fixed subassembly, another inside lateral wall of mounting groove is provided with the active carbon adsorption board with fixed subassembly matched with, the top middle part interlude of cleaning platform is provided with the washing frame with fixed plate matched with, a plurality of washing ponds with fixed subassembly matched with are all run through in the washing pond, the bottom all is provided with the washing spray tube in the washing pond, the bottom of washing spray tube all links to each other with the water tank through the water pump, be provided with the stoving cover with fixed subassembly matched with between the top inner wall of two support frames, the interior top of stoving cover is provided with stoving lamp, the one end lateral wall of cleaning platform is provided with control panel.

Further, in order to drive the pivot through servo motor second's output shaft and rotate, then drive round bar and stock rotation, when the one end of round bar gets into one of them recess one, through the rotation of round bar, because two recess second mutually perpendicular on the ring plate, thereby drive sleeve pipe and drive shaft rotation one hundred eighty degrees, then reagent bottle on the drive fixed plate carries out one hundred eighty degrees reciprocating motion, and then can be quick even carry out stoving work to reagent bottle, auxiliary assembly is including setting up the slider at the circumference outer wall of threaded rod, the one end lateral wall of slider is provided with the bottom plate, the one end lateral wall top of bottom plate is provided with the base, the one end lateral wall of base is provided with servo motor second, servo motor second output shaft has the pivot, one side that just keeps away from servo motor second has set gradually symmetrical stock and symmetrical round bar, and be cross arrangement between stock and the round bar, the tip of stock is provided with the arc pole, the one end lateral wall bottom of bottom plate is provided with the drive shaft with fixed plate matched with, drive shaft middle part circumference outside cover is provided with the sleeve pipe, the sleeve pipe both sides all are provided with the ring plate, sleeve pipe circumference and the circumference is provided with two recess and two mutual symmetry and two recess and two mutual match, two mutual match between the two recess and two opposite end, two opposite side and two recess and two opposite one-phase X are mutually supporting.

Further, in order to be under fixed subassembly's effect for promote through electric telescopic handle extension, then make Y shape impeller forward motion under electric telescopic handle's promotion, thereby drive two and remove the clamp and inwards move, and then can carry out diversified centering to the reagent bottle and fix, avoid causing reagent bottle skew phenomenon to take place, the centre gripping fixed work of reagent bottle of different bore can also be satisfied, the suitability is wider, fixed subassembly is including the fixed plate that sets up at the inside lateral wall of mounting groove, one side bottom of fixed plate is provided with the backup pad, one side of backup pad is provided with the disc, be provided with mounting fixture and two removal clamps on the disc, and mounting fixture evenly sets up on the disc with two removal clamps, two removal clamps are connected with the disc cooperation, one side of two removal clamps is provided with Y shape impeller, and Y shape impeller is connected with the disc cooperation, one side of Y shape impeller is provided with electric telescopic handle, and electric telescopic handle one side links to each other with the fixed plate, set up on the disc with mounting fixture and removal groove that moves the clamp matched with.

(III) beneficial effects

Compared with the prior art, the utility model provides the reagent cleaning device for the fuel coal quality assay of the power plant, which has the following beneficial effects:

(1) The utility model has reasonable and reliable structure and simple operation, so that under the action of the auxiliary component, the round rod and the long rod are driven to rotate through the rotation of the rotating shaft, when one end of the round rod enters one of the grooves I, the sleeve and the driving shaft are driven to rotate for one hundred eighty degrees through the rotation of the round rod, the reagent bottle on the fixing plate is driven to carry out one hundred eighty degrees of reciprocating motion, the reagent bottle is quickly and uniformly dried, and under the action of the fixing component, the Y-shaped pushing block is driven to move forwards under the pushing of the electric telescopic rod, the two movable clamps are driven to move inwards, so that the reagent bottle can be fixed in a multidirectional centering manner, and meanwhile, the clamping and fixing work of reagent bottles with different calibers can be satisfied, and the applicability is wider.

(2) Through setting up auxiliary assembly for under auxiliary assembly's effect, drive the pivot through servo motor's output shaft two and rotate, then drive round bar and stock and rotate, when one end of round bar gets into in one of them recess one, through the rotation of round bar, because two recess two mutually perpendicular on the ring plate, thereby drive sleeve pipe and drive shaft rotation one hundred eighty degrees, then drive the reagent bottle on the fixed plate and carry out one hundred eighty degrees reciprocating motion, and then can be quick even carry out stoving work to the reagent bottle.

(3) Through setting up fixed subassembly for under fixed subassembly's effect, promote through electric telescopic handle extension, then make Y shape impeller block forward movement under electric telescopic handle's promotion, thereby drive two and remove anchor clamps inward movement, and then can carry out diversified centering to the reagent bottle and fix, when avoiding causing the reagent bottle skew phenomenon to take place, can also satisfy the fixed work of centre gripping of the reagent bottle of different bore, the suitability is wider.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a reagent cleaning device for fuel coal quality assay of a power plant according to an embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of a reagent cleaning device for fuel coal quality assays of a power plant according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a partial enlarged view at B in FIG. 2;

FIG. 5 is a schematic structural view of an auxiliary component in a reagent washing apparatus for fuel coal quality assay of a power plant according to an embodiment of the present utility model;

Fig. 6 is a schematic structural view of a fixing assembly in a reagent cleaning device for fuel coal quality assay of a power plant according to an embodiment of the present utility model.

In the figure:

1. A cleaning table; 2. a support frame; 3. a servo motor I; 4. a threaded rod; 5. an auxiliary component; 501. a slide block; 502. a bottom plate; 503. a base; 504. a servo motor II; 505. a rotating shaft; 506. a long rod; 507. a round bar; 508. an arc-shaped rod; 509. a drive shaft; 5010. a sleeve; 5011. a circular plate; 5012. a groove I; 5013. a second groove; 6. a fixing plate; 7. a mounting groove; 8. a fixing assembly; 801. a fixing plate; 802. a support plate; 803. a disc; 804. a fixing clamp; 805. moving the clamp; 806. a Y-shaped pushing block; 807. an electric telescopic rod; 808. a moving groove; 9. an activated carbon adsorption plate; 10. cleaning a frame; 11. a cleaning pool; 12. cleaning the spray pipe; 13. a water pump; 14. a water tank; 15. a drying cover; 16. a drying lamp; 17. and a control panel.

Detailed Description

For the purpose of further illustrating the various embodiments, the present utility model provides the accompanying drawings, which are a part of the disclosure of the present utility model, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present utility model, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.

According to the embodiment of the utility model, a reagent cleaning device for testing the quality of fuel coal in a power plant is provided.

Referring to the drawings and the specific embodiments, as shown in fig. 1-6, the reagent cleaning device for testing fuel coal quality of a power plant according to the embodiment of the utility model comprises a cleaning table 1, two ends of the top of the cleaning table 1 are symmetrically provided with a supporting frame 2, the top end of the supporting frame 2 is provided with a first servo motor 3 in a penetrating way, the output end of the first servo motor 3 is connected with a threaded rod 4, the circumferential outer wall of the threaded rod 4 is sleeved with an auxiliary component 5, a fixing plate 6 is connected between one ends of the two auxiliary components 5, a plurality of mounting grooves 7 are formed in the top end of the fixing plate 6, a fixing component 8 is arranged on one side wall in the mounting groove 7, an activated carbon adsorption plate 9 matched with the fixing component 8 is arranged on the other side wall in the mounting groove 7, a cleaning frame 10 matched with the fixing component 8 is arranged in the middle of the top end of the cleaning table 1 in a penetrating way, a plurality of cleaning tanks 11 matched with the fixing component 8 are formed in the inside the cleaning frame 10, one side of each cleaning tank 11 is provided with a drain pipe penetrating through one side of the cleaning table 1 when the servo motor 3 is applied in a specific way, a cleaning spray pipe 12 is arranged in the bottom end 11, a cleaning nozzle 12 is arranged in the cleaning tank 12 in a penetrating way, a drying lamp is arranged on one side of the supporting frame 15, a drying lamp is arranged on the top end of the drying lamp 15 is connected with the drying lamp 15, and the drying lamp 15 is arranged on the top end of the drying lamp 15 is connected with the drying lamp 15 through the drying lamp 15, and the drying lamp 15 is arranged on the drying lamp 15.

In addition, the operation principle and structure of the first servo motor 3, the activated carbon adsorption plate 9, the cleaning nozzle 12, the water pump 13, the drying lamp 16, the second servo motor 504 and the electric telescopic rod 807 are all the prior art, and are not described herein.

In one embodiment, for the auxiliary assembly 5, the auxiliary assembly 5 includes a slider 501 disposed on the circumferential outer wall of the threaded rod 4, in specific application, a threaded hole matched with the threaded rod 4 is provided at the top end of the slider 501, a bottom plate 502 is disposed on one end side wall of the slider 501, a base 503 is disposed at the top of one end side wall of the bottom plate 502, a second servomotor 504 is disposed on one end side wall of the base 503, the output shaft of the second servomotor 504 is connected with a rotating shaft 505, a long rod 506 and a symmetrical round rod 507 are sequentially disposed on one side of the rotating shaft 505, the long rod 506 and the round rod 507 are arranged in a cross shape, an arc-shaped rod 508 is disposed at the end of the long rod 506, a driving shaft 509 matched with the fixed plate 6 is disposed at the bottom of one end side wall of the bottom plate 502, a sleeve 5010 is sleeved at the outer side of the middle circumference of the driving shaft 509, two circular ring 5011 are disposed on both sides of the sleeve 5010, a groove one 5012 is disposed at the outer circumference of the sleeve 5010, the two grooves 5012 are crossed with each other and form an X-shaped structure, the two circular plates 5012 are disposed at the outer circumference of the outer sides of the sleeve 5010, two opposite to each other, and the two circular rods 5013 are driven by two opposite rotation of the two circular rods 5011 and the two opposite rotation shafts 5013 are driven by two opposite rotation shafts 5013, and the two opposite rotation shafts 5013 are driven by two opposite rotation shafts 5011, 5 and one rotation 5 is driven by two opposite rotation shaft 5011, 5 is driven by two opposite rotation shaft 5, 5 and one rotation 5 is driven by two rotation 5 and has a reagent through two rotation 5 and one rotation 5 and has a fixed ring 5010, and then can be fast even carry out stoving work to the reagent bottle.

The specific working principle of the auxiliary assembly 5 is as follows: when the second servo motor 504 is started to rotate, the rotating shaft 505 is driven to rotate through the output shaft of the second servo motor 504, then the round rod 507 and the long rod 506 are driven to rotate, when the end part of the round rod 507 enters one of the grooves 5012, the sleeve 5010 and the driving shaft 509 are driven to rotate by one hundred eighty degrees through the rotation of the round rod 507, then the fixing plate 6 is driven to rotate by one hundred eighty degrees, when the end part of the round rod 507 leaves from the groove one 5012, at the moment, one end of the arc rod 508 enters the groove two 5013, the driving shaft 509 can be kept from rotating, and when the end part of the other round rod 507 enters the other groove one 5012, the sleeve 5010 and the driving shaft 509 can be driven to rotate reversely by one hundred eighty degrees, and then the round rod 507 is driven to rotate reversely by one hundred eighty degrees.

In one embodiment, for the above-mentioned fixing component 8, the fixing component 8 includes a fixing plate 801 disposed on an inner side wall of the mounting groove 7, a support plate 802 is disposed at a bottom of one side of the fixing plate 801, a disc 803 is disposed on one side of the support plate 802, a fixing clamp 804 and two moving clamps 805 are disposed on the disc 803, the fixing clamp 804 and the two moving clamps 805 are uniformly disposed on the disc 803, the two moving clamps 805 are cooperatively connected with the disc 803, a Y-shaped pushing block 806 is disposed on one side of the two moving clamps 805, and is cooperatively connected with the disc 803, an electric telescopic rod 807 is disposed on one side of the Y-shaped pushing block 806, and one side of the electric telescopic rod 807 is connected with the fixing plate 801, so that under the action of the fixing component 8, the electric telescopic rod 807 stretches and pushes the Y-shaped pushing block 806 forward, thereby driving the two moving clamps 805 to move inwards, thereby centering and fixing the reagent in multiple directions, and simultaneously, the reagent bottles with different diameters can be prevented from being clamped, and the reagent bottles with different diameters can be retained.

The specific working principle of the fixing assembly 8 is as follows: when the reagent bottle needs to be fixed, the electric telescopic rod 807 is started to stretch and push, the Y-shaped pushing block 806 moves forwards under the pushing of the electric telescopic rod 807, so that the two movable clamps 805 are driven to move inwards, and then the reagent bottle can be subjected to multidirectional centering and fixing clamping work.

Specifically, it should be explained that, since the coal quality analysis experiment is a process of performing detailed test and analysis on the coal sample, it is intended to understand the physical properties, chemical components and combustion characteristics of coal, and when the sulfur proportion in the coal is measured, harmful gases such as sulfur dioxide, carbon monoxide and nitrogen oxides are generated after the combustion of sulfur, which are harmful to the environment, and therefore, the activated carbon adsorption plate 9 is provided to adsorb the harmful gases remaining in the reagent bottle.

In order to facilitate understanding of the above technical solutions of the present utility model, the following describes in detail the working principle or operation manner of the present utility model in the actual process.

During practical application, the reagent bottle to be cleaned is placed in the mounting groove 7, and the reagent bottle is subjected to multidirectional centering fixation through the fixing component 8, the first 3 positive rotations of the servo motor are started through the control panel, the first 3 positive rotations of the servo motor drive the threaded rod 4 positive rotations, under the cooperation of the threaded rod 4 and the threaded hole, the auxiliary component 5 moves down and drives the fixing plate 6 to move down, the fixing plate 6 moves down and then drives the reagent bottle to move down, when the reagent bottle descends into the cleaning pool 11, the water pump 13 is started to spray water in the water tank 14 through the cleaning spray pipe 12, the inside of the reagent bottle is cleaned, the cleaned water is discharged through the drain pipe, in the cleaning process, the first 3 negative rotations of the servo motor are started, the first 3 negative rotations of the servo motor drive the threaded rod 4, under the cooperation of the threaded rod 4 and the threaded hole, the auxiliary component 5 moves up and drives the fixing plate 6 to move up, the fixing plate 6 moves up and then drives the reagent bottle to move up through the fixing plate 6, the reagent bottle is well and then the reagent bottle is dried through the cleaning spray pipe, the reagent bottle is dried after the reagent bottle is dried, the reagent bottle is dried in a hundred-drying machine is dried, and the reagent bottle is dried, the reagent bottle is dried in the drying machine is dried, and the reagent bottle is dried after the drying machine is dried, and the reagent bottle is dried.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (7)

1. The utility model provides a reagent belt cleaning device for chemical examination of power plant's fuel coal quality, includes cleaning table (1), its characterized in that, the top both ends symmetry of cleaning table (1) are provided with support frame (2), the top of support frame (2) is all run through and is provided with servo motor one (3), the output of servo motor one (3) all is connected with threaded rod (4), the circumference outer wall of threaded rod (4) all overlaps and is equipped with auxiliary assembly (5), two be connected with fixed plate (6) between the one end of auxiliary assembly (5), a plurality of mounting grooves (7) have been seted up on the top of fixed plate (6), one inside lateral wall of mounting groove (7) all is provided with fixed assembly (8), another inside lateral wall of mounting groove (7) be provided with fixed assembly (8) matched with active carbon adsorption plate (9);

The cleaning table is characterized in that a cleaning frame (10) matched with the fixing plate (6) is inserted in the middle of the top end of the cleaning table (1), a plurality of cleaning tanks (11) matched with the fixing assemblies (8) are arranged in the cleaning frame (10), cleaning spray pipes (12) are arranged in the cleaning tanks (11) in a penetrating mode, the bottoms of the cleaning spray pipes (12) are connected with the water tank (14) through water pumps (13), drying covers (15) matched with the fixing assemblies (8) are arranged between the inner walls of the tops of the two supporting frames (2), drying lamps (16) are arranged on the inner top ends of the drying covers (15), and control panels (17) are arranged on one end side walls of the cleaning table (1).

2. The reagent cleaning device for the fuel coal quality assay of the power plant according to claim 1, wherein the auxiliary assembly (5) comprises a sliding block (501) arranged on the circumferential outer wall of the threaded rod (4), a bottom plate (502) is arranged on one end side wall of the sliding block (501), a base (503) is arranged on the top of one end side wall of the bottom plate (502), a second servo motor (504) is arranged on one end side wall of the base (503), and an output shaft of the second servo motor (504) is connected with a rotating shaft (505);

The rotary shaft (505) is far away from one side of the second servo motor (504) and is sequentially provided with a symmetrical long rod (506) and a symmetrical round rod (507), the long rod (506) and the round rod (507) are arranged in a cross shape, and an arc-shaped rod (508) is arranged at the end part of the long rod (506).

3. The reagent cleaning device for the fuel coal assay of the power plant according to claim 2, wherein a driving shaft (509) matched with the fixing plate (6) is arranged at the bottom of one end side wall of the bottom plate (502), a sleeve (5010) is sleeved on the outer side of the circumference of the middle part of the driving shaft (509), annular plates (5011) are arranged on two sides of the sleeve (5010), grooves I (5012) which are symmetrical and matched with the end parts of the round rods (507) are formed on the outer side of the circumference of the sleeve (5010), and the grooves I (5012) are mutually intersected to form an X-shaped structure.

4. A reagent cleaning device for testing fuel coal quality of a power plant according to claim 3, wherein two symmetrical grooves (5013) matched with the arc-shaped rod (508) are formed on the outer side of the circumference of the annular plate (5011), the two grooves (5013) are perpendicular to each other on the annular plate (5011), and the two grooves (5013) are respectively matched with the end parts of the grooves (5012).

5. The reagent cleaning device for the fuel coal quality assay of the power plant according to claim 1, wherein the fixing assembly (8) comprises a fixing plate (801) arranged on the inner side wall of the mounting groove (7), a supporting plate (802) is arranged at the bottom of one side of the fixing plate (801), a disc (803) is arranged on one side of the supporting plate (802), a fixing clamp (804) and two moving clamps (805) are arranged on the disc (803), and the fixing clamp (804) and the two moving clamps (805) are uniformly arranged on the disc (803).

6. The reagent cleaning device for the fuel coal quality assay of the power plant according to claim 5, wherein two movable clamps (805) are connected with the disc (803) in a matching way, one side of each movable clamp (805) is provided with a Y-shaped pushing block (806), the Y-shaped pushing block (806) is connected with the disc (803) in a matching way, one side of each Y-shaped pushing block (806) is provided with an electric telescopic rod (807), and one side of each electric telescopic rod (807) is connected with the fixing plate (801).

7. The reagent cleaning device for the fuel coal quality assay of the power plant according to claim 6, wherein the disc (803) is provided with a moving groove (808) matched with the fixed clamp (804) and the moving clamp (805).