阅读说明：本技术 一种溶氧电极用弧面打磨装置 (Cambered surface grinding device for dissolved oxygen electrode ) 是由 肖佳利 李永健 全学刚 晏永辉 于 2019-09-30 设计创作，主要内容包括：本发明涉及一种溶氧电极用弧面打磨装置,属于机械加工技术领域,其技术要点是：包括底座、打磨组件和设置于底座上端面的机架,所述打磨组件包括设置于底座上端面的打磨盘和用于固定安装溶氧电极的安装座,所述安装座与机架之间连接有旋转框,所述旋转框呈门字型且其开口朝向底座方向设置,所述旋转框开口侧的两端固定设有连接轴,所述连接轴与机架转动连接,所述旋转框沿其长度方向的一端与机架之间设有转动组件,所述转动组件驱动旋转框绕连接轴轴线方向转动。本发明通过设置打磨组件取代人工手动打磨,提高打磨效率。(The invention relates to a cambered surface polishing device for a dissolved oxygen electrode, which belongs to the technical field of machining and is technically characterized in that: including base, the subassembly of polishing and setting up in the frame of base up end, the subassembly of polishing is including setting up in the mill of base up end and the mount pad that is used for fixed mounting dissolved oxygen electrode, be connected with the swivel mount between mount pad and the frame, the swivel mount is door style of calligraphy and its opening and sets up towards the base direction, the fixed connecting axle that is equipped with in both ends of swivel mount opening side, the connecting axle rotates with the frame to be connected, the swivel mount is equipped with the runner assembly between its length direction's one end and the frame along, the runner assembly drive swivel mount rotates around connecting axle axis direction. According to the invention, manual polishing is replaced by arranging the polishing assembly, so that the polishing efficiency is improved.)

1. The utility model provides a cambered surface grinding device for dissolved oxygen electrode which characterized in that: including base (1), the subassembly (3) of polishing and set up in frame (2) of base (1) up end, the subassembly (3) of polishing is including setting up in polishing dish (31) of base (1) up end and mount pad (32) that are used for fixed mounting dissolved oxygen electrode, be connected with between mount pad (32) and frame (2) revolving frame (33), revolving frame (33) are door style of calligraphy and its opening and set up towards base (1) direction, the fixed connecting axle (331) that is equipped with in both ends of revolving frame (33) opening side, connecting axle (331) rotate with frame (2) and are connected, revolving frame (33) are equipped with runner assembly (34) between its length direction's one end and frame (2) along, runner assembly (34) drive revolving frame (33) rotate around connecting axle (331) axis direction.

2. The arc surface polishing device for the dissolved oxygen electrode according to claim 1, wherein: the rotating assembly (34) comprises a rotating motor (341) fixedly connected with the rack (2) and a rotating block (342) fixedly arranged at the end part of an output shaft of the rotating motor (341), one end of the rotating block (342) is connected with the rotating motor (341), the other end of the rotating block (342) is provided with a sliding shaft (343), the rotating frame (33) corresponds to the sliding shaft (343) and is vertically provided with a waist-shaped sliding groove (332), and the sliding shaft (343) is connected with the waist-shaped sliding groove (332) in a sliding mode.

3. The arc surface polishing device for the dissolved oxygen electrode according to claim 2, wherein: the rotating motor (341) is electrically connected with a control unit (35), the control unit (35) comprises a driving branch (351) which is communicated with the rotating motor (341) and is used for driving the rotating motor (341) to rotate and a control branch (352) which is used for controlling whether the driving branch (351) is conducted or not, and the control branch (352) comprises a control circuit (3521) which is used for controlling whether the rotating motor (341) is electrified or not and a self-locking circuit (3522) which is used for ensuring that the rotating motor (341) continuously rotates.

4. The arc surface polishing device for the dissolved oxygen electrode according to claim 3, wherein: the control branch circuit (352) further comprises a time delay circuit (3523) for controlling the rotation time of the rotating motor (341), the time delay circuit (3523) comprises a 555 timer, a trigger circuit coupled to the output end of the 555 timer and a reset switch coupled to the trigger circuit, and when the reset switch is switched on, the rotating motor (341) stops rotating.

5. The arc surface polishing device for the dissolved oxygen electrode according to claim 2, wherein: frame (2) include with base (1) fixed connection's outrigger (21) and set up in outrigger (21) inboard inner frame (22), rotating electrical machines (341) and inner frame (22) fixed connection, inner frame (22) and outrigger (21) are along its length direction sliding connection.

6. The arc surface polishing device for the dissolved oxygen electrode according to claim 5, wherein: one end of the inner frame (22) is provided with a sliding pushing cylinder (23), the cylinder part of the sliding pushing cylinder (23) is fixedly connected with the outer frame (21), the end part of a piston rod of the sliding pushing cylinder (23) is fixedly connected with the inner frame (22), and when a piston rod of the sliding pushing cylinder (23) stretches, the inner frame (22) slides along the length direction of the outer frame (21).

7. The arc surface polishing device for the dissolved oxygen electrode according to claim 1, wherein: one side of the polishing disc (31) departing from the mounting seat (32) is provided with a sliding assembly (36), the sliding assembly (36) comprises a base plate (361) and a rodless cylinder (362) arranged between the base plate (361) and the polishing disc (31), and the polishing disc (31) is fixedly connected with a piston rod of the rodless cylinder (362).

8. The arc surface polishing device for the dissolved oxygen electrode according to claim 7, wherein: the four corners department that chassis (361) deviated from one side of polishing dish (31) is equipped with cylinder (38), four the jar portion of cylinder (38) all with base (1) fixed connection, the piston rod and chassis (361) fixed connection of cylinder (38), the flexible drive chassis (361) of cylinder (38) piston rod reciprocate.

9. The arc surface polishing device for the dissolved oxygen electrode according to claim 8, wherein: a pressure sensor (37) is arranged between the polishing disc (31) and the chassis (361), the pressure sensor (37) is electrically connected with an electromagnetic valve of the air cylinder (38), and the pressure sensor (37) controls the extension and retraction of a piston rod of the air cylinder (38).

Technical Field

The invention relates to the technical field of machining, in particular to a cambered surface polishing device for a dissolved oxygen electrode.

Background

Dissolved oxygen is molecular oxygen dissolved in a liquid, and is an essential condition for the survival of aquatic organisms and aquatic plants. The determination of the dissolved oxygen concentration is of great significance in the fields of industry, medicine, environmental monitoring, aquaculture and the like, and is one of important indexes of water quality pollution degree.

A water quality dissolved oxygen detector is a common device for detecting oxygen content in water. The electrode head is covered with a semi-permeable membrane, and oxygen in the liquid penetrates through the semi-permeable membrane to reach the cathode, so that electrons flow between the two electrodes to generate current.

As shown in fig. 7, in order to ensure the detection sensitivity of the sensor, the end of the dissolved oxygen electrode 4 needs to be polished after the production process is completed to remove the glass protective layer 41 formed at the end thereof during the production process. Because the tip of dissolved oxygen electrode is the arc surface setting, for guaranteeing can not damage the pellicle at the in-process of polishing, often polish dissolved oxygen electrode through artifical manual, the manual work is polished and is not only wasted time and energy, and production efficiency is low moreover.

Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a cambered surface polishing device for a dissolved oxygen electrode, which is provided with a polishing component to replace manual polishing, so that the polishing efficiency is improved.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a cambered surface grinding device for dissolved oxygen electrode, includes base, the subassembly of polishing and sets up in the frame of base up end, the subassembly of polishing is including setting up in the mill of base up end and the mount pad that is used for fixed mounting dissolved oxygen electrode, be connected with the swivel mount between mount pad and the frame, the swivel mount is door style of calligraphy and its opening and sets up towards the base direction, the fixed connecting axle that is equipped with in swivel mount open side's both ends, the connecting axle rotates with the frame to be connected, the swivel mount is equipped with the runner assembly between its length direction's one end and the frame, the runner assembly drive swivel mount rotates around connecting axle axis direction.

By adopting the technical scheme, the base and the rack are arranged for installing the polishing assembly, the installation position required by the work of the polishing assembly is met, the vertical installation of the polishing disc and the installation seat is realized, the dissolved oxygen electrode is fixedly installed on the installation seat, the rotating frame is arranged on the rack, the installation seat is fixedly installed on the rotating frame, the rotating assembly is arranged on one side of the rotating frame, the rotating assembly drives the rotating frame to rotate, so that the dissolved oxygen electrode installed on the installation seat rotates, the motion track of the dissolved oxygen electrode is in arc motion, and when the dissolved oxygen electrode is in contact with the polishing disc for polishing, the polishing surface of the dissolved oxygen electrode is in an arc surface due to arc motion of the dissolved oxygen electrode; utilize mechanical structure's the mutually supporting, realize that machinery is polished and is replaced artifical polishing, improve the efficiency of polishing.

The invention is further configured to: the rotating assembly comprises a rotating motor fixedly connected with the rack and a rotating block fixedly arranged at the end part of an output shaft of the rotating motor, one end of the rotating block is connected with the rotating motor, the other end of the rotating block is provided with a sliding shaft, the rotating frame corresponds to the sliding shaft and is vertically provided with a waist-shaped sliding groove, and the sliding shaft is connected with the waist-shaped sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, rotate the motor drive turning block through setting up and rotate, through setting up the slide-shaft in the one end of turning block, make the turning block realize the effect of eccentric wheel, through set up waist type spout on rotatory frame, and make the turning block be connected with waist type spout, the opening direction that realizes rotatory frame can be towards the mill of polishing, simultaneously under the drive of rotation motor, thereby the turning block slides in waist type spout and drives the reciprocal upset of rotatory frame, the cambered surface that realizes dissolving the oxygen electrode is polished.

The invention is further configured to: the rotating motor is electrically connected with a control unit, the control unit comprises a driving branch communicated with the rotating motor and used for driving the rotating motor to rotate and a control branch controlling whether the driving branch is conducted or not, and the control branch comprises a control circuit controlling whether the rotating motor is electrified or not and a self-locking circuit ensuring that the rotating motor continuously rotates.

Through adopting above-mentioned technical scheme, control rotating electrical machines's rotation through setting up the control unit, rotating electrical machines is connected with the drive branch road electricity to for rotating electrical machines's rotation provides required electric energy, through setting up the control branch road, make things convenient for the operator to control rotating electrical machines's rotation.

The invention is further configured to: the control branch circuit is including being used for controlling the time delay circuit that rotates the motor rotation time, time delay circuit includes 555 timer and coupling in the trigger circuit of 555 timer output and the reset switch that is coupled in trigger circuit, when reset switch switches on, the rotation motor stall.

Through adopting above-mentioned technical scheme, control rotating motor's rotation time through setting up delay circuit to avoid long-time polishing and lead to dissolved oxygen electrode to be worn and torn, through setting up reset switch, after 555 timer's extension time finishes, reset switch control rotates motor stall, thereby finishes immediately and polishes.

The invention is further configured to: the frame includes the outrigger with base fixed connection and sets up in the inner frame of outrigger inboard, rotate motor and inner frame fixed connection, inner frame and outrigger are along its length direction sliding connection.

Through adopting above-mentioned technical scheme, through setting up outrigger and inner tower, with mount pad and rotation motor fixed mounting on the inner tower to make the inner tower slide along the length direction of outrigger, thereby when making the inner tower slide, drive the mount pad and rotate the whole slip of motor, make the area of contact of dissolved oxygen electrode and abrasive disc bigger, increase abrasive disc's area of polishing.

The invention is further configured to: one end of the inner frame is provided with a sliding pushing cylinder, the cylinder part of the sliding pushing cylinder is fixedly connected with the outer frame, the end part of a piston rod of the sliding pushing cylinder is fixedly connected with the inner frame, and the inner frame slides along the length direction of the outer frame when the piston rod of the sliding pushing cylinder stretches.

By adopting the technical scheme, the reciprocating sliding of the inner frame is realized by arranging the sliding push cylinder and utilizing the expansion and contraction of the piston rod of the sliding push cylinder.

The invention is further configured to: one side of the polishing disc, which is far away from the mounting seat, is provided with a sliding assembly, the sliding assembly comprises a chassis and a rodless cylinder arranged between the chassis and the polishing disc, and the polishing disc is fixedly connected with a piston rod of the rodless cylinder.

Through adopting above-mentioned technical scheme, through setting up the slip subassembly in the polishing dish bottom, will polish the dish and be connected with the piston rod of rodless cylinder to when making the piston rod of rodless cylinder slide, can drive the polishing dish and remove, increase the area of polishing dish, improve the utilization ratio of polishing dish.

The invention is further configured to: the four corners department that the chassis deviates from one side of the polishing disc is equipped with the cylinder, four the jar portion of cylinder all with base fixed connection, the piston rod and the chassis fixed connection of cylinder, the flexible chassis that drives of cylinder piston rod reciprocates.

Through adopting above-mentioned technical scheme, through setting up the cylinder on the chassis, utilize the flexible mill that makes of cylinder to carry out the oscilaltion under the drive on chassis, guarantee to dissolve the contact of oxygen electrode and mill in the in-process of polishing, make things convenient for simultaneously to dissolve the installation and the dismantlement of oxygen electrode on the mount pad.

The invention is further configured to: a pressure sensor is arranged between the polishing disc and the chassis and electrically connected with an electromagnetic valve of the air cylinder, and the pressure sensor controls the extension of a piston rod of the air cylinder.

Through adopting above-mentioned technical scheme, through set up pressure sensor between dish and the chassis of polishing, utilize pressure sensor to control the solenoid valve of cylinder to realize cylinder piston rod's flexible, conveniently when polishing the beginning, when the cylinder drives the chassis and the dish of polishing rises, can guarantee dissolved oxygen electrode and the dish contact of polishing, and can not make the pressure between dish of polishing and the dissolved oxygen electrode too big and lead to the dissolved oxygen electrode to damage.

In conclusion, the beneficial technical effects of the invention are as follows: the polishing disc is arranged on the base and is arranged on the rotating frame which is rotatably connected with the rack, the mounting seat is fixedly arranged on the rotating frame, and the rotating assembly is arranged to drive the rotating frame to rotate, so that the mounting seat drives the dissolved oxygen electrode to move in an arc track, and the polishing of the arc surface at the end part of the dissolved oxygen electrode is realized; by arranging the outer frame and the inner frame and enabling the inner frame to slide along the length direction of the outer frame, the contact area of the dissolved oxygen electrode and the polishing disc is enlarged, and the polishing area of the polishing disc is increased; the sliding assembly is arranged and rotated on one side of the base plate, which is far away from the polishing disc, and the polishing disc is driven to slide by the sliding assembly, so that the polishing area of the polishing disc is further increased; through setting up the control unit, control rotating electrical machines's rotation, when improving the precision of polishing, avoid polishing the time overlength and lead to dissolved oxygen electrode wearing and tearing, reduce the loss rate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a partial exploded view of the present invention, showing primarily the connection between the rotating frame and the rotating assembly;

FIG. 3 is a partial circuit schematic of the present invention, showing primarily the circuit components of the control unit;

FIG. 4 is a partial cross-sectional view of the present invention, primarily showing the components of the mount;

FIG. 5 is a partial exploded view of the present invention, showing primarily the components of the slide assembly;

FIG. 6 is a partial circuit schematic of the present invention, showing primarily the pressure sensor versus cylinder control circuit;

fig. 7 is an overall structural view of a dissolved oxygen electrode requiring polishing in the prior art.

In the figure: 1. a base; 2. a frame; 21. an outer frame; 22. an inner frame; 23. sliding the pushing cylinder; 3. polishing the assembly; 31. grinding disc; 311. a slider; 32. a mounting seat; 321. a mounting frame; 322. a holder; 3221. a shaft cylinder; 32211. mounting grooves; 3222. a shaft sleeve; 3223. a friction washer; 33. rotating the frame; 331. a connecting shaft; 332. a waist-shaped chute; 34. a rotating assembly; 341. rotating the motor; 342. rotating the block; 343. a slide shaft; 35. a control unit; 351. a drive branch; 352. a control branch; 3521. a control circuit; 3522. a self-locking circuit; 3523. a delay circuit; 36. a sliding assembly; 361. a chassis; 362. a rodless cylinder; 363. a slide bar; 37. a pressure sensor; 38. a cylinder; 39. a rotating assembly; 391. a rotating electric machine; 392. a driving gear; 393. a driven gear; 4. a dissolved oxygen electrode; 41. and a glass protective layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the cambered surface polishing device for the dissolved oxygen electrode disclosed by the invention comprises a base 1, a polishing assembly 3 and a frame 2 arranged on the upper end surface of the base 1, wherein the polishing assembly 3 comprises a polishing disc 31 arranged on the upper end surface of the base 1 and a mounting seat 32 arranged on the frame 2 and used for fixedly mounting the dissolved oxygen electrode. Be connected with swivel frame 33 between mount pad 32 and the frame 2, mount pad 32 is fixed to be set up in swivel frame 33, and swivel frame 33 can overturn from top to bottom around the axis of junction between it and the frame 2 for swivel frame 33 drives the orbit that the dissolved oxygen electrode removed and is the arc, thereby realizes that the friction that forms when dissolved oxygen electrode tip and 31 contact friction of polishing dish personally submits the arc, guarantees that the protective layer of dissolved oxygen electrode tip can evenly polish.

Referring to fig. 1 and 2, the rotating frame 33 is in a shape of a Chinese character 'men' and has an opening facing the direction of the base 1, the two ends of the opening side of the rotating frame 33 are fixedly provided with a connecting shaft 331, and the connecting shaft 331 is rotatably connected with the frame 2, so that the rotating frame 33 can be turned over along the connecting position between the rotating frame and the frame 2. In order to facilitate the stable, uniform and efficient rotation of the rotating frame 33, a rotating component 34 is disposed between one end of the rotating frame 33 along the length direction thereof and the frame 2, and the rotating component 34 drives the rotating frame 33 to rotate around the axis direction of the connecting shaft 331.

Referring to fig. 1 and 2, the rotating assembly 34 includes a rotating motor 341 fixedly connected to the motor and a rotating block 342 fixedly disposed at an end of an output shaft of the rotating motor 341, the rotating block 342 is disposed in a rectangular parallelepiped shape, one end of the rotating block 342 is connected to the rotating motor 341, and the other end is provided with a sliding shaft 343. A waist-shaped sliding groove 332 is vertically formed in the rotating frame 33 corresponding to the sliding shaft 343, the sliding shaft 343 is connected with the waist-shaped sliding groove 332 in a sliding manner, and the waist-shaped sliding groove 332 is positioned above the connecting shaft 331; when the length direction of the rotating block 342 is parallel to the length direction of the waist-shaped sliding slot 332, the sliding shaft 343 is located at one end of the waist-shaped sliding slot 332. The length of the waist-shaped sliding chute 332 is equal to twice the distance between the sliding shaft 343 and the output shaft of the rotating motor 341, and the rotating range of the rotating frame 33 is limited due to the limitation of the sliding shaft 343; when the rotating motor 341 drives the rotating block 342 to rotate, the sliding shaft 343 slides in the kidney-shaped sliding slot 332, so that the rotating frame 33 is deflected by the driving of the sliding shaft 343.

Referring to fig. 3, in order to prevent the dissolved oxygen electrode from being worn due to an excessively long polishing time, the rotating motor 341 is connected to a control unit 35, and the control unit 35 includes a driving branch 351 communicating with the rotating motor 341 and driving the rotating motor 341 to rotate, and a control branch 352 controlling whether the driving branch 351 is turned on or not. Drive branch 351 is connected in external power supply VCC, include and establish ties with rotation motor 341 and set up total control switch SB, and total control switch SB adopts the ship type switch for whether control grinding device totality starts. The control branch 352 includes a control circuit 3521 for controlling whether the rotating motor 341 is powered on or off, a self-locking circuit 3522 for ensuring the rotating motor 341 continuously rotates, a delay circuit 3523 for controlling the rotating time of the rotating motor 341, and a power source VCC for supplying power required for operation.

Referring to fig. 3, the control circuit 3521 includes a push button switch K and an excitation coil of a first relay KM1 connected in series between a power source VCC and the ground, a first normally open contact KM1-1 of the first relay KM1 is connected in series between a master control switch SB and the rotating motor 341, and when the push button switch K is pressed, the excitation coil of the first relay KM1 is energized, so that the first normally open contact KM1-1 is attracted, and the rotating motor 341 is energized and rotates.

Referring to fig. 3, the self-locking circuit 3522 includes an optocoupler U and a second normally open contact KM1-2 of the first relay KM1, the optocoupler U includes a phototransistor Q connected in series between the push button switch K and the excitation coil of the first relay KM1, and a light emitting diode LED connected in series between the second normally open contact KM1-2 and the ground, a light receiving portion of the phototransistor Q faces the light emitting diode LED, the light emitting diode LED is connected in parallel with the excitation coil of the first relay KM1, and the second normally open contact KM1-2 is connected in series with the excitation coil of the first relay KM 1. When the button switch K is pressed, the excitation coil of the first relay KM1 is electrically conducted, and the light emitting diode LED emits light, so that the second normally open contact KM1-2 is closed, thereby ensuring that the excitation coil of the first relay KM1 is continuously electrified.

Referring to fig. 3, the delay circuit 3523 includes a 555 timer, a trigger circuit coupled to an output terminal of the 555 timer, and a reset switch KM coupled to the trigger circuit, the trigger circuit includes a first switching element Q1 having a control electrode connected to an output terminal of the 555 timer, and the first switching element Q1 is an NPN-type transistor. The reset switch KM adopts a normally closed relay, a normally closed contact of the reset switch KM is connected between the light-emitting diode LED and the ground in series, and two ends of an electrified coil of the reset switch KM are respectively connected between a power supply VCC and a collector of the first switching element Q1. The third normally open contact KM1-3 that has protection resistor R2 and first relay KM1 in series between power VCC and the ground, the node between protection resistor R2 and the third normally open contact KM1-3 is coupled in 555 timer's trigger power VCC end, after first relay KM 1's excitation coil circular telegram, third normally open contact KM1-3 is closed, 555 timer's trigger power VCC end input low level, thereby make 555 timer's output high level, first switch element Q1 switches on, thereby make reset switch KM's circular telegram coil electrified, reset switch KM's normally closed contact disconnection this moment, emitting diode LED outage, thereby make first relay KM 1's excitation coil outage, rotation motor 341 stops rotating.

Referring to fig. 2 and 4, in order to improve polishing efficiency, the mounting seat 32 includes a mounting frame 321 fixedly connected to the rotating frame 33 and a plurality of clamping seats 322 disposed along a length direction of the mounting frame 321, in this embodiment, the number of the clamping seats 322 is four, the clamping seats 322 are disposed at one end of the mounting frame 321 facing the base 1, the clamping seats 322 are used for fixedly mounting the dissolved oxygen electrode, and after the dissolved oxygen electrode is mounted on the clamping seats 322, one end of the dissolved oxygen electrode, which needs to be polished, faces the base 1; thereby make a plurality of dissolved oxygen electrodes polish simultaneously, improve the efficiency of polishing. The plurality of holders 322 each include a shaft 3221 rotatably disposed on the mounting frame 321, and an installation groove 32211 is vertically disposed inside the shaft 3221, and the installation groove 32211 is used for installing a dissolved oxygen electrode.

Referring to fig. 4, in order to facilitate the positioning of the dissolved oxygen electrode in the mounting groove 32211, the mounting groove 32211 is convex; when installed, the end of the dissolved oxygen electrode abuts the mounting groove 32211. A shaft sleeve 3222 is in threaded connection with one end of the shaft sleeve 3221 facing the base 1, a friction washer 3223 which can be abutted against the outer wall of the dissolved oxygen electrode is arranged inside the shaft sleeve 3222, and the friction washer 3223 is made of rubber materials. When the friction washer 3223 abuts against the end of the shaft barrel 3221, the friction washer 3223 is deformed by pressure, so that the friction washer 3223 is fixedly abutted against the outer wall of the dissolved oxygen electrode, and the fixed installation of the dissolved oxygen electrode in the holder 322 is ensured by utilizing the friction force between the friction washer 3223 and the dissolved oxygen electrode.

Referring to fig. 2 and 4, in order to ensure that the end of the dissolved oxygen electrode can be polished more uniformly, one end of the holder 322, which is away from the base 1, is connected with a rotating assembly 39, the rotating assembly 39 includes a rotating electrical machine 391 which is fixedly arranged at the upper end of the rotating frame 33, an output shaft of the rotating electrical machine 391 faces the holder 322, and a driving gear 392 is coaxially and fixedly arranged at the end of the holder 322, the driving gear 392 is engaged and driven by four driven gears 393, and each driven gear 393 is installed and rotated on the holder 322 in a one-to-one correspondence. The four clamping seats 322 are rotatably connected with the mounting frame 321, and in order to ensure that the center of gravity of the rotating frame 33 is located on the center line of the rotating frame 33, the driving gear 392 is located in the middle of the four driven gears 393, so that the number of the clamping seats 322 on the two sides of the driving gear 392 is equal; the driving gear 392 is engaged with two driven gears 393 on both sides thereof, and the two driven gears 393 on both sides of the driving gear 392 are engaged with each other, respectively. When the rotation motor 391 drives the driving gear 392 to rotate, the four driven gears 393 are driven by the driving gear 392 to rotate, so that any position of the end of the dissolved oxygen electrode can be brought into contact with the polishing disk 31 and polished.

Referring to fig. 1 and 5, the frame 2 includes an outer frame 21 fixedly connected to the base 1 and an inner frame 22 disposed on an outer side, the outer frame 21 and the inner frame 22 are both in a shape of a Chinese character 'men', and the opening ends of the outer frame and the inner frame are both disposed toward one side of the base 1. The rotating motor 341 is fixedly connected with the inner frame 22, and the inner frame 22 is slidably connected with the outer frame 21 along the length direction thereof, so that different positions of the polishing disc 31 can be in contact with the end part of the dissolved oxygen electrode, and the damage of the polishing disc 31 caused by the long-time contact polishing of part of the polishing disc 31 and the dissolved oxygen electrode is avoided. One end of the upper end of the inner frame 22 is provided with a sliding push cylinder 23, the cylinder part of the sliding push cylinder 23 is fixedly connected with the outer frame 21, and the end part of the piston rod of the sliding push cylinder 23 is fixedly connected with the inner frame 22, so that when the piston rod of the sliding push cylinder 23 stretches, the inner frame 22 is driven to slide along the length direction of the outer frame 21, and the polishing disc 31 is in different contact positions with the end part of the piston rod.

Referring to fig. 1 and 5, in order to ensure that the polishing disc 31 can be better utilized, a sliding assembly 36 is arranged on one side of the polishing disc 31, which is away from the mounting seat 32, the sliding assembly 36 includes a base plate 361 and a rodless cylinder 362 arranged between the base plate 361 and the polishing disc 31, the polishing disc 31 is fixedly connected with a piston rod of the rodless cylinder 362, and the length direction of the rodless cylinder 362 is perpendicular to the length direction of the sliding push cylinder 23, so that each friction part of the polishing disc 31 can be in contact with the dissolved oxygen electrode for polishing under the matching between the rodless cylinder 362 and the sliding push cylinder 23. The rodless cylinder 362 is arranged in the middle of the chassis 361, in order to ensure the stability of the polishing disc 31 during movement, two sides of the rodless cylinder 362 are provided with a sliding rod 363 arranged in parallel with the sliding rod 362, two ends of the sliding rod 363 are fixedly arranged with the chassis 361, and the lower end of the polishing disc 31 is fixedly provided with a sliding block 311 connected with the sliding rod 363 in a sliding manner, so that the stable sliding of the polishing disc 31 is ensured.

Referring to fig. 5, in order to facilitate the installation and the detachment of the dissolved oxygen electrode on the installation base 32, the four corners of one side of the base plate 361, which is away from the polishing disc 31, are provided with air cylinders 38, the cylinder parts of the four air cylinders 38 are all fixedly connected with the base 1, the piston rods of the air cylinders 38 are fixedly connected with the base plate 361, and the extension of the piston rods of the air cylinders 38 is controlled to drive the base plate 361 to move up and down. When the dissolved oxygen electrode needs to be mounted or dismounted, the piston rod of the air cylinder 38 contracts, so that the polishing disc 31 is far away from the mounting seat 32; when the oxygen dissolving electrode needs to be polished, the piston rod of the air cylinder 38 is extended, so that the polishing disk 31 moves towards the side of the mounting seat 32 until the end of the oxygen dissolving electrode contacts with the polishing disk 31.

Referring to fig. 5 and 6, because the movement track of the dissolved oxygen electrode is arc-shaped, in order to ensure that the dissolved oxygen electrode is in the moving process, the polishing disc 31 can be better contacted with the end part of the dissolved oxygen electrode, and the polishing effect of the end part of the dissolved oxygen electrode is close, a pressure sensor 37 is arranged between the polishing disc 31 and the chassis 361, the pressure sensor 37 is electrically connected with the electromagnetic valve of the air cylinder 38, the opening and closing of the electromagnetic valve of the air cylinder 38 is controlled by arranging the pressure sensor 37, so that the expansion and contraction of the piston rod of the air cylinder 38 are controlled, and the end part of the dissolved oxygen electrode is ensured to be stably contacted with the polishing disc 31.

Referring to fig. 5 and 6, a comparator is connected to the pressure sensor 37, one input terminal of the comparator is connected to the output terminal of the pressure sensor 37, a reference voltage is input to the other input terminal of the comparator, and when the pressure sensor 37 is subjected to different pressures, the voltage value input to the comparator by the pressure sensor 37 is changed, so that the output signal of the comparator is changed. The output end of the comparator is coupled with a second switching element Q2, the control electrode of the second switching element Q2 is coupled with the comparator, the second switching element Q2 also adopts an NPN type triode, an excitation coil of a second relay KM2 is coupled between the collector electrode of the second switching element Q2 and a power supply VCC, and a normally closed contact of the second relay KM2 is connected with the electromagnetic valve in series; the emitter of the second switching element Q2 is connected to ground through a protection resistor R7. In order to conveniently control the equipment and damage the polishing disc 31 caused by the error extension of the air cylinder 38, the electromagnetic valve is connected with the master control switch SB in series, and the normally closed contact of the electromagnetic valve and the second relay KM2 is connected with the rotating motor 341 in parallel, so that the air cylinder 38 extends to drive the polishing disc 31 to be in stable contact with the end part of the dissolved oxygen electrode in the working process of the polishing assembly 3.

Referring to fig. 5 and 6, the pressure sensor 37 is provided with a preset pressure range value, and when the pressure sensor 37 detects that the pressure is smaller than the preset pressure maximum value, the comparator outputs a low level signal, the second switching element Q2 is turned off, the solenoid valve is kept in the power-on state, and the piston rod of the cylinder 38 is extended; when the pressure detected by the pressure sensor 37 is greater than the preset pressure minimum value, the comparator outputs a high level signal, the second switching element Q2 is turned on, the excitation coil of the second relay KM2 is energized, the normally closed contact of the second relay KM2 is opened, the solenoid valve is closed, and the piston rod of the air cylinder 38 is contracted.

The specific implementation process of the embodiment: by fixedly mounting the dissolved oxygen electrode on the mounting seat 32, and enabling the end part of the dissolved oxygen electrode to be polished to face the polishing disc 31; then, the master control switch SB is pressed, and the button switch K is pressed, at this time, the excitation coil of the first relay KM1 is energized, so that the rotating motor 341 rotates; meanwhile, because the dissolved oxygen electrode is not in contact with the polishing disc 31, the electromagnetic valve of the air cylinder 38 is kept in an electrified open state, so that the piston rod of the air cylinder 38 extends, and when the dissolved oxygen electrode is in contact with the polishing disc 31, the on-off state of the electromagnetic valve is adjusted according to the pressure between the dissolved oxygen electrode and the polishing disc 31. When the delay time of the 555 timer is reached, namely the polishing time is finished, the reset switch KM is switched on, so that the normally closed contact of the reset switch KM is switched off, the magnet exciting coil of the first relay KM1 is powered off, the rotating motor 341 stops rotating, the electromagnetic valve of the air cylinder 38 is powered off, and the piston rod of the air cylinder 38 is contracted. And finally, sequentially taking the dissolved oxygen electrodes off the mounting seat 32, and finishing polishing.