CN112551648A

CN112551648A - Electrochemistry water treatment facilities convenient to adjust electrode spacing

Info

Publication number: CN112551648A
Application number: CN202011322607.3A
Authority: CN
Inventors: 黄卫新; 黄卫东
Original assignee: Chongqing Hehongxin Environmental Protection Technology Co ltd
Current assignee: Chongqing Hehongxin Environmental Protection Technology Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-03-26
Anticipated expiration: 2040-11-23
Also published as: CN112551648B

Abstract

The invention relates to an electrochemical water treatment device convenient for adjusting the electrode spacing, wherein the inner walls of the bottoms of two sides of a treatment box are respectively and fixedly provided with a water inlet pipe and a water outlet pipe, a first electrode ring is fixedly arranged in the treatment box, a second electrode ring and a third electrode ring are respectively and slidably connected in the treatment box, the top end of a mounting pipe in the second electrode ring extends to the upper part of the treatment box and is fixedly provided with a supporting plate, the two ends of a supporting rod which is slidably connected in the mounting pipe respectively extend to two sides of the mounting pipe and are respectively and fixedly connected with the inner wall of the third electrode ring, the top end of a lifting screw fixedly arranged at the top of the supporting rod penetrates through the supporting plate and extends to the upper part of the supporting plate, the top of the supporting plate is in threaded connection with a connecting rod and is in transmission connection with the treatment box, the two ends of a double-shaft motor, the number of the electrode rings is increased or reduced conveniently, and the service life of the electrode rings is prolonged.

Description

Electrochemistry water treatment facilities convenient to adjust electrode spacing

Technical Field

The invention belongs to the technical field of sewage treatment, and relates to an electrochemical water treatment device convenient for adjusting electrode spacing.

Background

The electrochemical water treatment technology is a process for degrading pollutants in wastewater through a certain chemical reaction, electrochemical process or physical process in a specific electrochemical reactor under the action of an electrode or an external electric field.

Currently, the position of an electrode plate is usually fixed, but the amount of water to be treated in each time period is difficult to be constant, so that when the specific surface area of the electrode plate is designed, the electrode plate is usually designed according to the maximum amount of treated water, which results in that the electrode plate still participates in water treatment under the condition of small amount of treated water, so that the electrode plate cannot be effectively utilized, and the service life of the electrode plate is continuously lost, therefore, an electrochemical water treatment device convenient for adjusting the electrode spacing is provided for solving the problem.

Disclosure of Invention

In view of the above, the present invention provides an electrochemical water treatment device that facilitates adjustment of an electrode gap, in order to solve the problems that positions of electrode plates are generally fixed, and a water amount to be treated in each time period is difficult to be constant, so that when a specific surface area of an electrode plate is designed, the electrode plate is generally designed according to a maximum water treatment amount, which results in that the electrode plate still participates in water treatment under a condition of a small water treatment amount, so that the electrode plate is not effectively utilized, and the service life of the electrode plate is continuously lost.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electrochemistry water treatment facilities convenient to adjust electrode spacing, includes the processing case, on the both sides bottom inner wall of processing case respectively fixed mounting have inlet tube and drain pipe, and the one end that inlet tube and drain pipe kept away from each other extends to the both sides of processing the case respectively, fixed mounting has first electrode ring in the processing case, and sliding connection has second electrode ring and third electrode ring respectively in the processing case, second electrode ring is located between first electrode ring and the third electrode ring, fixed mounting has the installation pipe in the second electrode ring, and the top of installation pipe extends to the top of processing the case and fixed mounting has the backup pad, backup pad and processing case sliding connection, sliding connection has the bracing piece in the installation pipe, and the both ends of bracing piece extend to the both sides of installation pipe respectively and all with the inner wall fixed connection of third electrode ring, the top fixed mounting of bracing piece has the lifting screw who is located the installation pipe, and the top of lifting screw runs through the backup pad and extends to the top of backup pad, the top threaded connection of backup pad has the connecting rod, and the connecting rod is connected with the transmission of processing case, the top sliding connection of backup pad has double-shaft motor, and double-shaft motor's both ends respectively with connecting rod and lifting screw swing joint.

The beneficial effect of this basic scheme lies in: the invention can be used for carrying out transmission meshing through the first bevel gear and the fourth bevel gear or meshing the second bevel gear and the third bevel gear, so that the distance between every two of the first electrode ring, the second electrode ring and the third electrode ring can be conveniently adjusted, the number of the electrode rings can be conveniently increased or reduced when the water amount in the treatment box is different, and the service life of the electrode rings can be effectively prolonged.

Further, the equal symmetry fixed mounting in both sides of backup pad has two gag lever posts, and four gag lever posts all with handle case sliding connection, beneficial effect: the supporting plate can be longitudinally limited in sliding.

Further, equal slidable mounting in both sides has L type pole in addition of backup pad, the connecting rod respectively with two L type pole fixed connection, and fixed mounting has the transmission ring that is the slope setting on the L type pole, the equal fixed mounting in both sides top of handling the case has the fender axle, and two fender axles run through two transmission rings respectively and are connected with the inner wall transmission of two transmission rings respectively, beneficial effect: the support plate can be driven to move longitudinally by the connecting rod.

Further, top one side of backup pad is rotated and is connected with drive screw, and drive screw run through the connecting rod and with connecting rod threaded connection, the top sliding connection of backup pad has the sliding plate, and double-shaft motor fixed mounting is in one side of sliding plate, sliding plate one side is rotated and is connected with the pivot, and the one end fixed mounting of pivot has the third bevel gear, the one end fixed mounting of screw rod has the second bevel gear, and second bevel gear and third bevel gear swing joint, an output shaft and the pivot transmission of double-shaft motor are connected, beneficial effect: the transmission screw rod can be conveniently driven to rotate.

Further, fixed cover is equipped with the worm wheel in the pivot, and fixed cover is equipped with the worm on an output shaft of biax motor, the worm meshes with the worm wheel mutually, beneficial effect: the rotating shaft can be conveniently driven to rotate.

Further, the top of backup pad is rotated and is connected with the screw ring, the lifting screw run through the screw ring and with screw ring threaded connection, one side fixed mounting of sliding plate has the mounting panel, and biax motor fixed mounting is in one side of mounting panel, another output shaft of biax motor run through the mounting panel and with screw ring swing joint, beneficial effect: the third electrode ring can be driven to move longitudinally by the thread principle.

Further, the opposite side of mounting panel rotates and is connected with the back shaft, and the one end fixed mounting of back shaft has a fourth bevel gear, fixed cover is equipped with first bevel gear on the screw ring, fourth bevel gear and first bevel gear swing joint, another output shaft and the back shaft transmission of double-shaft motor are connected, beneficial effect: the fourth bevel gear and the first bevel gear can drive the threaded ring to rotate.

Further, all fixed cover is equipped with the synchronizing wheel on another output shaft of back shaft and biax motor, and transmission connection has same hold-in range, beneficial effect on two synchronizing wheels: the drive back shaft that can be stable rotates.

Further, the top fixed mounting of backup pad has driving motor, and driving motor's output shaft and sliding plate transmission are connected, beneficial effect: the position of the double-shaft motor can be automatically adjusted.

Further, fixed mounting has the rotation screw rod on driving motor's the output shaft, and rotates threaded connection on the screw rod and have the threading board, threading board and the opposite side fixed connection of sliding plate, beneficial effect: can make things convenient for the biax motor to carry out the steady removal through the screw thread principle.

The invention has the beneficial effects that:

the electrochemical water treatment device convenient for adjusting the electrode spacing, disclosed by the invention, drives the transmission screw rod to rotate by starting the driving motor, at the moment, the threaded plate can drive the sliding plate to move transversely, so that the first bevel gear and the fourth bevel gear can be conveniently meshed, or the second bevel gear and the third bevel gear are meshed, when the first bevel gear and the fourth bevel gear are in a meshed state, the support shaft can be driven to rotate by starting the double-shaft motor through the transmission of the synchronous belt, when the support shaft rotates, the threaded ring can be driven to rotate through the transmission of the fourth bevel gear and the first bevel gear, so that the lifting screw rod can be driven to move longitudinally, at the moment, the third electrode ring can be moved longitudinally, and the spacing between the third electrode ring and the second electrode ring can be adjusted;

when the second bevel gear and the third bevel gear are meshed, the worm can rotate when the double-shaft motor is started, under the transmission action of the worm wheel, the rotating shaft can be driven to rotate, so that the third bevel gear can be driven to rotate, then under the transmission action of the second bevel gear, the transmission screw can be driven to rotate, so that the connecting rod can be driven to rotate, when the connecting rod moves, the two L-shaped rods can drive the two transmission rings to move transversely, and under the action of the two blocking shafts, the transmission ring can move transversely and also move longitudinally, so that the support plate can be driven to move longitudinally and move longitudinally, the mounting pipe can drive the second electrode ring and the third electrode ring to synchronously move longitudinally, so that the position intervals of the first electrode ring, the second electrode ring and the third electrode ring can be respectively adjusted;

the invention can be used for carrying out transmission meshing through the first bevel gear and the fourth bevel gear or meshing the second bevel gear and the third bevel gear, so that the distance between every two of the first electrode ring, the second electrode ring and the third electrode ring can be conveniently adjusted, the number of the electrode rings can be conveniently increased or reduced when the water amount in the treatment box is different, and the service life of the electrode rings can be effectively prolonged.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a front view of an electrochemical water treatment device of the present invention for facilitating adjustment of the electrode spacing;

FIG. 2 is a top view of an electrochemical water treatment device of the present invention that facilitates adjustment of the electrode spacing;

FIG. 3 is a side view of a supporting plate and a treating tank coupling structure of an electrochemical water treatment apparatus for conveniently adjusting an electrode interval according to the present invention;

FIG. 4 is a side view of a worm gear and worm connection structure in an electrochemical water treatment device for facilitating adjustment of electrode spacing in accordance with the present invention;

FIG. 5 is an enlarged view of the portion A of FIG. 2 according to the present invention.

Reference numerals: 1 treatment box, 2 water inlet pipes, 3 water outlet pipes, 4 first electrode rings, 5 second electrode rings, 6 third electrode rings, 7 installation pipes, 8 support rods, 9 support plates, 10 threaded rings, 11 first bevel gears, 12 connecting rods, 13 transmission rings, 14 transmission screw rods, 15 limiting rods, 16 second bevel gears, 17 sliding plates, 18 rotating shafts, 19 third bevel gears, 20 double-shaft motors, 21 driving motors, 22 rotating screw rods, 23 baffle shafts, 24 lifting screw rods, 25L-shaped rods, 26 worm gears, 27 worms, 28 support shafts, 29 synchronous belts and 30 fourth bevel gears.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

1-5, including handling case 1, it has inlet tube 2 and drain pipe 3 to handle respectively fixed mounting on the both sides bottom inner wall of case 1, and the one end that inlet tube 2 and drain pipe 3 kept away from each other extends to the both sides of handling case 1 respectively, it has first electrode ring 4 to handle the interior fixed mounting of case 1, and handle and have second electrode ring 5 and third electrode ring 6 in the case 1 respectively sliding connection, second electrode ring 5 is located between first electrode ring 4 and the third electrode ring 6, fixed mounting has installation pipe 7 in the second electrode ring 5, and the top of installation pipe 7 extends to the top of handling case 1 and fixed mounting has backup pad 9, backup pad 9 and handling case 1 sliding connection.

A supporting rod 8 is connected in the installation tube 7 in a sliding manner, two ends of the supporting rod 8 respectively extend to two sides of the installation tube 7 and are fixedly connected with the inner wall of the third electrode ring 6, a lifting screw 24 positioned in the installation tube 7 is fixedly installed at the top of the supporting rod 8, the top end of the lifting screw 24 penetrates through the supporting plate 9 and extends to the upper side of the supporting plate 9, a connecting rod 12 is connected at the top of the supporting plate 9 in a threaded manner, the connecting rod 12 is in transmission connection with the processing box 1, a double-shaft motor 20 is connected at the top of the supporting plate 9 in a sliding manner, two ends of the double-shaft motor 20 are respectively in movable transmission connection with the connecting rod 12 and the lifting screw 24, two limiting rods 15 are symmetrically and fixedly installed at two sides of the supporting plate 9, four limiting rods 15 are in sliding connection with the processing box 1, the limiting rods 15 can longitudinally limit the, connecting rod 12 respectively with two L type pole 25 fixed connection, and L type pole 25 goes up fixed mounting has the transmission ring 13 that is the slope setting, the equal fixed mounting in both sides top of handling case 1 has fender axle 23, and two fender axles 23 run through two transmission rings 13 respectively and are connected with the inner wall transmission of two transmission rings 13 respectively, can realize that connecting rod 12 drives backup pad 9 and carries out longitudinal motion, top one side of backup pad 9 is rotated and is connected with drive screw 14, and drive screw 14 run through connecting rod 12 and with connecting rod 12 threaded connection.

The top of the supporting plate 9 is slidably connected with a sliding plate 17, a double-shaft motor 20 is fixedly installed on one side of the sliding plate 17, one side of the sliding plate 17 is rotatably connected with a rotating shaft 18, one end of the rotating shaft 18 is fixedly provided with a third bevel gear 19, one end of the screw 14 is fixedly provided with a second bevel gear 16, the second bevel gear 16 is movably engaged with the third bevel gear 19, one output shaft of the double-shaft motor 20 is in transmission connection with the rotating shaft 18, the three bevel gears are matched to conveniently drive the transmission screw 14 to rotate, the rotating shaft 18 is fixedly sleeved with a worm wheel 26, one output shaft of the double-shaft motor 20 is fixedly sleeved with a worm 27, the worm 27 is engaged with the worm wheel 26, the worm wheel 26 is matched with the worm 27 to conveniently drive the rotating shaft 18 to rotate, the top of the supporting plate 9 is rotatably connected with a threaded, one side of the sliding plate 17 is fixedly provided with a mounting plate, the double-shaft motor 20 is fixedly arranged on one side of the mounting plate, the other output shaft of the double-shaft motor 20 penetrates through the mounting plate and is movably connected with the threaded ring 10 in a transmission manner, the third electrode ring 6 can be driven to longitudinally move by the thread principle, the other side of the mounting plate is rotatably connected with a supporting shaft 28, one end of the supporting shaft 28 is fixedly provided with a fourth bevel gear 30, the threaded ring 10 is fixedly sleeved with a first bevel gear 11, the fourth bevel gear 30 is movably engaged with the first bevel gear 11, the other output shaft of the double-shaft motor 20 is in transmission connection with the supporting shaft 28, the threaded ring 10 can be driven to rotate by the fourth bevel gear 30 and the first bevel gear 11, the supporting shaft 28 and the other output shaft of the double-shaft motor 20 are, the synchronous belt 29 stably drives the supporting shaft 28 to rotate.

In this embodiment, the top fixed mounting of backup pad 9 has driving motor 21, and driving motor 21's output shaft and sliding plate 17 transmission are connected, can be automatic adjust the position of double-shaft motor 20, and fixed mounting has rotation screw rod 22 on driving motor 21's the output shaft, and has the thread plate on rotating screw rod 22, and the opposite side fixed connection of thread plate and sliding plate 17 can make things convenient for double-shaft motor 20 to carry out the steady removal through the screw thread principle.

This electrochemistry water treatment facilities's convenient to adjust electrode spacing application method, this technical scheme inlet tube 2 can carry sewage to handle in the case 1 to handle to according to how much of the water yield, the use amount of control electrode ring, specific implementation step is: the driving motor 21 is started to drive the transmission screw 22 to rotate, the sliding plate 17 can be driven to move transversely through the threaded plate at the moment, so that the first bevel gear 11 and the fourth bevel gear 30 can be conveniently meshed, or the second bevel gear 16 and the third bevel gear 19 can be meshed, when the first bevel gear 11 and the fourth bevel gear 30 are in a meshed state, the supporting shaft 28 can be driven to rotate through the transmission of the synchronous belt 29 by starting the double-shaft motor 20, when the supporting shaft 28 rotates, the threaded ring 10 can be driven to rotate through the transmission of the fourth bevel gear 30 and the first bevel gear 11, so that the lifting screw 24 can be driven to move longitudinally, and at the moment, the third electrode ring 6 can be moved longitudinally, so that the distance between the third electrode ring 6 and the second electrode ring 5 can be adjusted.

When the second bevel gear 16 and the third bevel gear 19 are engaged, the worm 27 can be rotated by starting the dual-shaft motor 20, the rotating shaft 18 can be driven to rotate under the transmission action of the worm wheel 26, so that the third bevel gear 19 can be driven to rotate, then the transmission screw 14 can be driven to rotate under the transmission action of the second bevel gear 16, so that the connecting rod 12 can be driven to rotate, when the connecting rod 12 moves, the two transmission rings 13 can be driven to move transversely by the two L-shaped rods 25, and the transmission rings 13 can also move longitudinally while moving transversely by the action of the two blocking shafts 23, so that the support plate 9 can be driven to move longitudinally, and the second electrode ring 5 and the third electrode ring 6 can be driven to move longitudinally by the mounting pipe 7 synchronously, so that the first electrode ring 4, the second electrode ring 4 and the third electrode ring 6 can be respectively realized, The position interval of the second electrode ring 5 and the third electrode ring 6 is adjusted, so that when the water amount in the treatment box 1 is different, the second electrode ring 5 and the third electrode ring 6 can be moved into sewage or moved out of the sewage, the number of the electrode rings can be conveniently increased or reduced, and the service life of the electrode rings can be effectively prolonged.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. The utility model provides an electrochemistry water treatment facilities convenient to adjust electrode spacing, is including handling case (1), its characterized in that, it has inlet tube (2) and drain pipe (3) to handle respectively fixed mounting on the both sides bottom inner wall of case (1), and inlet tube (2) and drain pipe (3) one end of keeping away from each other extend to the both sides of handling case (1) respectively, it has first electrode ring (4) to handle case (1) internal fixed mounting, and handles in case (1) respectively sliding connection have second electrode ring (5) and third electrode ring (6), second electrode ring (5) are located between first electrode ring (4) and third electrode ring (6), second electrode ring (5) internal fixed mounting has installation pipe (7), and the top of installation pipe (7) extends to the top of handling case (1) and fixed mounting has backup pad (9), backup pad (9) with handle case (1) sliding connection, install pipe (7) sliding connection has bracing piece (8), and the both ends of bracing piece (8) extend respectively to the both sides of installing pipe (7) and all with the inner wall fixed connection of third electrode ring (6), the top fixed mounting of bracing piece (8) has lifting screw (24) that are located installing pipe (7), and the top of lifting screw (24) runs through backup pad (9) and extends to the top of backup pad (9), the top threaded connection of backup pad (9) has connecting rod (12), and connecting rod (12) are connected with processing case (1) transmission, the top sliding connection of backup pad (9) has double-shaft motor (20), and the both ends of double-shaft motor (20) are connected with connecting rod (12) and lifting screw (24) transmission respectively.

2. The electrochemical water treatment device convenient for adjusting the electrode spacing as claimed in claim 1, wherein two limiting rods (15) are symmetrically and fixedly installed on both sides of the supporting plate (9), and the four limiting rods (15) are slidably connected with the treatment box (1).

3. The electrochemical water treatment device convenient for adjusting the electrode spacing according to claim 2, wherein the other two sides of the supporting plate (9) are slidably provided with L-shaped rods (25), the connecting rod (12) is fixedly connected with the two L-shaped rods (25), the L-shaped rods (25) are fixedly provided with driving rings (13) which are arranged obliquely, the tops of the two sides of the treatment box (1) are fixedly provided with blocking shafts (23), and the two blocking shafts (23) respectively penetrate through the two driving rings (13) and are in transmission connection with the inner walls of the two driving rings (13).

4. The electrochemical water treatment device convenient for adjusting the electrode spacing as claimed in claim 1, wherein a transmission screw (14) is rotatably connected to one side of the top of the support plate (9), the transmission screw (14) penetrates through the connecting rod (12) and is in threaded connection with the connecting rod (12), a sliding plate (17) is slidably connected to the top of the support plate (9), a double-shaft motor (20) is fixedly installed at one side of the sliding plate (17), a rotating shaft (18) is rotatably connected to one side of the sliding plate (17), a third bevel gear (19) is fixedly installed at one end of the rotating shaft (18), a second bevel gear (16) is fixedly installed at one end of the screw (14), the second bevel gear (16) is movably engaged with the third bevel gear (19), and an output shaft of the double-shaft motor (20) is in transmission connection with the rotating shaft (18).

5. The electrochemical water treatment device convenient for adjusting the electrode distance as recited in claim 4, wherein a worm wheel (26) is fixedly sleeved on the rotating shaft (18), and a worm (27) is fixedly sleeved on an output shaft of the double-shaft motor (20), and the worm (27) is engaged with the worm wheel (26).

6. The electrochemical water treatment device convenient for adjusting the electrode spacing as claimed in claim 4, wherein a threaded ring (10) is rotatably connected to the top of the supporting plate (9), the lifting screw (24) penetrates through the threaded ring (10) and is in threaded connection with the threaded ring (10), a mounting plate is fixedly mounted on one side of the sliding plate (17), the double-shaft motor (20) is fixedly mounted on one side of the mounting plate, and the other output shaft of the double-shaft motor (20) penetrates through the mounting plate and is in movable transmission connection with the threaded ring (10).

7. The electrochemical water treatment device convenient for adjusting the electrode spacing as claimed in claim 6, wherein a support shaft (28) is rotatably connected to the other side of the mounting plate, a fourth bevel gear (30) is fixedly mounted at one end of the support shaft (28), a first bevel gear (11) is fixedly sleeved on the threaded ring (10), the fourth bevel gear (30) is movably engaged with the first bevel gear (11), and the other output shaft of the double-shaft motor (20) is in transmission connection with the support shaft (28).

8. The electrochemical water treatment device convenient for adjusting the electrode distance as claimed in claim 7, wherein a synchronous wheel is fixedly sleeved on each of the supporting shaft (28) and the other output shaft of the double-shaft motor (20), and the same synchronous belt (29) is in transmission connection with the two synchronous wheels.

9. An electrochemical water treatment device convenient for adjusting the electrode distance as claimed in claim 4, wherein a driving motor (21) is fixedly installed on the top of the supporting plate (9), and the output shaft of the driving motor (21) is in transmission connection with the sliding plate (17).

10. The electrochemical water treatment device convenient for adjusting the electrode distance as claimed in claim 9, wherein a rotating screw (22) is fixedly installed on the output shaft of the driving motor (21), and a threaded plate is connected to the rotating screw (22) in a threaded manner and is fixedly connected to the other side of the sliding plate (17).