Valve copper core grinding device

Abstract

The invention belongs to the technical field of valve grinding equipment, and particularly relates to a valve copper core grinding device which comprises a grinding table, a motor, a rotating shaft and a copper core jacking mechanism, a first supporting plate is fixedly arranged on one side of the top of the grinding table, and the motor is fixedly arranged on the side face of the first supporting plate; one end of the rotating shaft is fixedly connected with the output end of the motor, and the copper core jacking mechanism is arranged on the shaft wall of the rotating shaft. The copper core roughness detection mechanism, the copper core diameter detection mechanism, the waterproof temperature sensor and the like are arranged and matched with the PLC, so that the surface roughness and the outer diameter of the ball valve copper core can be detected in real time, the grinding feeding amount is adjusted in a self-adaptive mode, excessive grinding is prevented, the grinding precision and stability can be guaranteed, the grinding uniformity is improved, and the grinding efficiency is improved. The product quality and the production efficiency are effectively improved, and the defective rate and the production cost are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of valve grinding equipment, and in particular relates to a valve copper core grinding device. Background Art

[0002] In modern industrial production and daily life, valves are widely used as key components for controlling the flow of fluid media. Among them, ball valves play an important role in many fields such as petroleum, chemical industry, and electric power by virtue of their advantages in various aspects. The copper core of the ball valve is the core component of the ball valve. Its surface quality and dimensional accuracy directly affect the sealing performance, service life and overall working efficiency of the ball valve.

[0003] With the continuous improvement of the level of industrial automation, higher standards are also proposed for the grinding accuracy and efficiency of the copper core of the ball valve. In the grinding process of the copper core of the ball valve, the performance requirements of the grinding device are the key link of the grinding. For example, the announcement number: CN117620878A discloses a valve copper core grinding device; however, in the existing grinding device, most of them can only detect the surface smoothness of the copper core of the ball valve by manual touch, optical microscope observation or surface roughness measuring instrument when the grinding device is stopped during the grinding process. This detection method is not only cumbersome and inefficient, but also has great subjectivity and errors in manual judgment, making it difficult to achieve high-precision quality control; in addition, the lack of effective real-time ball valve copper core diameter detection means makes it difficult to accurately grasp the grinding amount during the grinding process, and it is easy to over-grind, which in turn affects the sealing performance of the ball valve, greatly reduces the use quality and reliability of the copper core of the ball valve, and increases the defective rate and production cost of the product.

[0004] Therefore, a valve copper core grinding device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a valve copper core grinding device in view of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a valve copper core grinding device, comprising a grinding table, a motor, a rotating shaft and a copper core tightening mechanism, wherein a first support plate is fixedly arranged on one side of the top of the grinding table, the motor is fixedly arranged on the side of the first support plate, one end of the rotating shaft is fixedly connected to the output end of the motor, the copper core tightening mechanism is arranged on the shaft wall of the rotating shaft, and further comprising:

[0007] Two second support plates are symmetrically fixed on both sides of the top of the grinding table, the sides of the two second support plates are fixed with first cylinders, the moving ends of the two first cylinders are fixed with arc covers, the inner side walls of the two arc covers are fixed with arc grinding plates, and the two arc grinding plates are located on both sides of the copper core tightening mechanism;

[0008] A copper core roughness detection mechanism is fixedly arranged on the top of the first support plate, and the copper core roughness detection mechanism extends to the top of the copper core tightening mechanism;

[0009] A copper core diameter detection mechanism is fixedly disposed between the two second support plates, and the copper core diameter detection mechanism is located below the copper core tightening mechanism;

[0010] A grinding liquid spraying mechanism is fixedly arranged on one side of the top of the grinding table, and the spraying ends of the grinding liquid spraying mechanism are respectively fixedly connected to the tops of the two arc-shaped covers;

[0011] A PLC controller is fixedly arranged on one side of the top of the grinding table, and the motor, the copper core tightening mechanism, the first cylinder, the copper core roughness detection mechanism, the copper core diameter detection mechanism and the grinding liquid spraying mechanism are all electrically connected to the PLC controller.

[0012] Preferably, the copper core roughness detection mechanism includes a third support plate fixedly arranged on the top of the first support plate, and the third support plate is an L-shaped plate, a second cylinder is fixedly arranged on the top of the third support plate, a light shield is fixedly arranged on the movable end of the second cylinder, a mounting plate is fixedly arranged inside the light shield, a laser displacement sensor is fixedly arranged at the center of the mounting plate, inclined mounting plates are fixedly arranged on both sides of the lower surface of the mounting plate, laser detectors are fixedly arranged on the lower surfaces of the two mounting plates, and an annular nylon brush is fixedly arranged on the bottom of the light shield.

[0013] Preferably, the copper core diameter detection mechanism includes a detection cylinder located between the two second support plates, fixed rods are fixedly provided between the two ends of the detection cylinder and the two second support plates, a detection resistor rod is laterally fixedly provided inside the detection cylinder, a detection conductive ring is symmetrically slidably provided on the rod wall of the detection resistor rod, insulating pull rods are sealed and slidably provided at both ends of the detection cylinder, connecting rods are fixedly provided on the bottom side walls of the two arc-shaped covers, one end of the two insulating pull rods are respectively fixedly connected to the side walls of the two detection conductive rings, and the other ends of the two insulating pull rods are respectively fixedly connected to the lower ends of the two connecting rods.

[0014] Preferably, the grinding liquid spraying mechanism includes a grinding liquid storage cylinder fixedly arranged on the top of the grinding table, a grinding liquid extraction pump is fixedly arranged inside the grinding liquid storage cylinder, a hard extraction pipe is fixedly arranged at the output end of the grinding liquid extraction pump, one end of the hard extraction pipe away from the grinding liquid extraction pump extends to the outside of the grinding liquid storage cylinder and is fixedly provided with two soft connecting pipes, one end of the two soft connecting pipes away from the hard extraction pipe is respectively fixedly connected to the top of the two arc covers, the two arc covers both adopt a hollow structure, and grinding liquid spraying holes are opened on the inner walls of the two arc covers and on the upper and lower sides of the arc grinding plate.

[0015] Preferably, a waterproof temperature sensor is fixedly embedded in the inner wall of one of the arc-shaped covers, and a grinding liquid cooler is provided on the wall of the hard extraction tube. Both the waterproof temperature sensor and the grinding liquid cooler are electrically connected to the PLC controller.

[0016] Preferably, a fourth support plate is fixedly provided on the top of the grinding table and on a side away from the first support plate, and a screw-in screw is threaded on the side of the fourth support plate, a conical top seat is rotatably provided at one end of the screw-in screw, and the tip of the conical top seat is abutted against one end of the rotating shaft.

[0017] Preferably, a liquid receiving trough is fixedly provided on the top of the grinding table and below the two copper core tightening mechanisms, a filter screen is fixedly provided at the opening of the liquid receiving trough, a drain pipe extending to the bottom of the grinding table is fixedly provided at the bottom of the liquid receiving trough, and a switch valve is provided on the wall of the drain pipe.

[0018] Preferably, the copper core tightening mechanism includes a third cylinder symmetrically fixedly arranged on the shaft wall of the rotating shaft, the movable end of the third cylinder is fixedly provided with an arc-shaped top plate, the rotating shaft adopts a hollow shaft, and an air supply rotary joint is arranged at one end of the rotating shaft.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the copper core roughness detection mechanism, according to the electrical signal fed back by the copper core roughness detection mechanism, the PLC controller can automatically adjust the extension speed of the first cylinder, that is, adaptively adjust the grinding feed amount. When the surface roughness of the copper core of the ball valve is large, the extension speed of the first cylinder is increased to speed up the grinding efficiency. As the surface roughness decreases, the extension speed is gradually reduced to avoid the phenomenon of surface quality degradation and increased wear of the arc grinding plate caused by excessive grinding feed. At the same time, it avoids the problems of cumbersome operation, low efficiency, subjectivity and large errors of traditional manual detection methods, thereby improving product quality and production efficiency.

[0021] 2. The copper core diameter detection mechanism is set up to monitor the change of the outer diameter of the copper core of the ball valve in real time. When the electrical signal corresponding to the change of the resistance value of the detection resistor rod connected to the circuit reaches the preset threshold, the PLC controller immediately stops the extension of the first cylinder, effectively avoiding excessive grinding of the copper core of the ball valve by the arc grinding plate, which helps to achieve high-precision quality control and reduce the defective rate and production cost of the product.

[0022] 3. Through the setting of the grinding liquid spraying mechanism, waterproof temperature sensor and grinding liquid cooler, the waterproof temperature sensor can detect the temperature during the grinding process. When the temperature reaches the preset threshold during the grinding process, the grinding liquid is cooled to prevent the copper core of the ball valve and the arc-shaped grinding plate from thermal deformation due to high temperature, thereby ensuring the grinding accuracy and avoiding the degradation of the grinding liquid performance due to high temperature, thus ensuring stable and efficient grinding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of a valve copper core grinding device provided by the present invention;

[0024] Figure 2 It is a cutaway stereoscopic diagram of a valve copper core grinding device provided by the present invention;

[0025] Figure 3 It is a cutaway stereoscopic diagram of a second support plate, a first cylinder and an arc-shaped cover of a valve copper core grinding device provided by the present invention;

[0026] Figure 4 It is a three-dimensional diagram of a copper core roughness detection mechanism of a valve copper core grinding device provided by the present invention;

[0027] Figure 5 It is a three-dimensional diagram of a copper core diameter detection mechanism of a valve copper core grinding device provided by the present invention;

[0028] Figure 6 It is a stereoscopic diagram of a grinding liquid ejection mechanism of a valve copper core grinding device provided by the present invention.

[0029] In the figure: 1 grinding table, 2 motor, 3 rotating shaft, 4 copper core tightening mechanism, 41 third cylinder, 42 arc top plate, 43 air supply rotary joint, 5 first support plate, 6 second support plate, 7 first cylinder, 8 arc cover, 9 arc grinding plate, 10 copper core roughness detection mechanism, 101 third support plate, 102 second cylinder, 103 light shielding cover, 104 mounting plate, 105 laser displacement sensor, 106 mounting plate, 107 laser detector, 108 annular nylon brush, 11 copper core diameter detection mechanism, 111 detection tube , 112 fixing rod, 113 detecting resistor rod, 114 detecting conductive ring, 115 insulating pull rod, 116 connecting rod, 12 grinding liquid ejection mechanism, 121 grinding liquid storage cylinder, 122 grinding liquid extraction pump, 123 hard extraction pipe, 124 soft connecting pipe, 125 grinding liquid ejection hole, 13 PLC controller, 14 waterproof temperature sensor, 15 grinding liquid refrigerator, 16 fourth support plate, 17 screw-in screw, 18 conical top seat, 19 liquid receiving tank, 20 filter screen, 21 drain pipe, 22 switch valve. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figure 1-Figure 6 As shown, a valve copper core grinding device includes a grinding table 1, a motor 2, a rotating shaft 3 and a copper core tightening mechanism 4. A first support plate 5 is fixedly arranged on one side of the top of the grinding table 1. The motor 2 is fixedly arranged on the side of the first support plate 5. One end of the rotating shaft 3 is fixedly connected to the output end of the motor 2. The copper core tightening mechanism 4 is arranged on the shaft wall of the rotating shaft 3. The copper core tightening mechanism 4 includes a third cylinder 41 symmetrically fixedly arranged on the shaft wall of the rotating shaft 3. The moving ends of the third cylinder 41 are fixedly provided with an arc-shaped top plate 42. The rotating shaft 3 adopts a hollow shaft, and an air supply rotary joint 43 is arranged at one end of the rotating shaft 3. The air supply rotary joint 43 is connected to the air supply system, so that the gas enters the interior of the third cylinder 41 during the rotation of the rotating shaft 3, thereby being able to drive the arc-shaped top plate 42 to move and complete the tightening positioning of the copper core of the ball valve. The design of the structure here can avoid the phenomenon of winding of the air pipeline when the copper core tightening mechanism 4 rotates, and also includes:

[0032] The two second support plates 6 are symmetrically fixed on both sides of the top of the grinding table 1. The sides of the two second support plates 6 are fixed with first cylinders 7. The movable ends of the two first cylinders 7 are fixed with arc covers 8. The inner side walls of the two arc covers 8 are fixed with arc grinding plates 9. The two arc grinding plates 9 are located on both sides of the copper core tightening mechanism 4. When the first cylinder 7 is telescopic, it can drive the arc cover 8 and the arc grinding plate 9 to move.

[0033] A fourth support plate 16 is fixedly provided on the top of the grinding table 1 and on one side away from the first support plate 5. A screw thread is provided on the side of the fourth support plate 16. A conical top seat 18 is rotatably provided at one end of the screw thread 17, and the tip of the conical top seat 18 is abutted against one end of the rotating shaft 3. The screw thread 17 is rotated by hand, and the screw thread 17 drives the conical top seat 18 to abut against the end of the rotating shaft 3 during spiral advancement, thereby reducing the vibration and eccentricity of the rotating shaft 3 during the subsequent rotation process and improving the uniformity of grinding.

[0034] A liquid receiving tank 19 is fixedly provided on the top of the grinding table 1 and below the two copper core tightening mechanisms 4. A filter screen 20 is fixedly provided at the opening of the liquid receiving tank 19. A drainage pipe 21 extending to the bottom of the grinding table 1 is fixedly provided at the bottom of the liquid receiving tank 19, and a switch valve 22 is provided on the wall of the drainage pipe 21. After use, the grinding liquid will fall into the inside of the liquid receiving tank 19 due to gravity, and impurities in the grinding liquid can be filtered through the filter screen 20. When the inside of the liquid receiving tank 19 is full, the staff opens the switch valve 22 to discharge the grinding liquid through the drainage pipe 21 for recycling.

[0035] The copper core roughness detection mechanism 10 is fixedly arranged on the top of the first support plate 5, and the copper core roughness detection mechanism 10 extends to the top of the copper core tightening mechanism 4. The copper core roughness detection mechanism 10 includes a third support plate 101 fixedly arranged on the top of the first support plate 5, and the third support plate 101 is an L-shaped plate. A second cylinder 102 is fixedly arranged on the top of the third support plate 101, and a light shield 103 is fixedly arranged on the moving end of the second cylinder 102. A mounting plate 104 is fixedly arranged inside the light shield 103, and a laser displacement sensor 105 is fixedly arranged at the center of the mounting plate 104. Both sides of the lower surface of the mounting plate 104 are fixedly provided with inclined mounting pieces 106, and the lower surfaces of the two mounting pieces 106 are fixedly provided with laser detectors 107. The laser displacement sensor 105 emits a laser beam to the ball The surface of the valve copper core uses the principle of optical triangulation to calculate the distance from the surface of the ball valve copper core to the sensor based on the position of the light spot of the reflected light on the detector. During the scanning measurement process, the microscopic ups and downs caused by the surface roughness cause the distance value to change. The roughness parameters are obtained through analysis and calculation. The laser detector 107 is used to monitor the laser beam to ensure that it normally irradiates the copper core surface, and can also cooperate with the laser displacement sensor 105 to accurately control the measurement position; an annular nylon brush 108 is fixedly provided at the bottom of the light shield 103. The annular nylon brush 108 has a certain degree of softness and adsorption. The grinding liquid water stains on the surface of the ball valve copper core can be removed by adsorption and wiping. For the dust generated by grinding, the bristles of the nylon brush can sweep up the dust and adsorb part of it, thereby improving the detection accuracy of the laser displacement sensor 105.

[0036] The copper core diameter detection mechanism 11 is fixedly arranged between the two second support plates 6, and the copper core diameter detection mechanism 11 is located below the copper core tightening mechanism 4. The copper core diameter detection mechanism 11 includes a detection tube 111 located between the two second support plates 6. Fixed rods 112 are fixedly arranged between the two ends of the detection tube 111 and the two second support plates 6. A detection resistor rod 113 is fixedly arranged inside the detection tube 111. A detection conductive ring 114 is symmetrically slidably arranged on the rod wall of the detection resistor rod 113. Insulating pull rods 115 are sealed and slidably arranged at both ends of the detection tube 111 to prevent water stains from entering the interior of the detection tube 111. The bottom side walls of the two arc-shaped covers 8 are fixedly provided with connecting rods 113. The connecting rod 116, one end of the two insulating pull rods 115 are fixedly connected to the side walls of the two detection conductive rings 114, and the other ends of the two insulating pull rods 115 are fixedly connected to the lower ends of the two connecting rods 116. The two arc covers 8 gradually approach each other, which can drive the insulating pull rods 115 on the two connecting rods 116 to approach each other. At the same time, the two detection conductive rings 114 move on the detection resistor rod 113 and approach each other, so that the resistance of the detection resistor rod 113 connected to the circuit is reduced, and a changing electrical signal is generated. The change of the electrical signal will immediately stop the extension action of the first cylinder 7, thereby avoiding the phenomenon that the arc grinding plate 9 over-grinds the copper core of the ball valve.

[0037] The grinding liquid spraying mechanism 12 is fixedly arranged on one side of the top of the grinding table 1, and the spraying ends of the grinding liquid spraying mechanism 12 are respectively fixedly connected to the tops of the two arc-shaped covers 8. The grinding liquid spraying mechanism 12 includes a grinding liquid storage cylinder 121 fixedly arranged on the top of the grinding table 1, and a grinding liquid extraction pump 122 is fixedly arranged inside the grinding liquid storage cylinder 121. A hard extraction pipe 123 is fixedly arranged at the output end of the grinding liquid extraction pump 122. The hard extraction pipe 123 extends to the outside of the grinding liquid storage cylinder 121 at one end away from the grinding liquid extraction pump 122 and is fixedly provided with two soft connecting pipes 124. The two soft connecting pipes 124 are respectively fixedly connected to the tops of the two arc-shaped covers 8 at one end away from the hard extraction pipe 123. The two arc-shaped covers 8 both adopt a hollow structure. The inner walls of the two arc-shaped covers 8 and the upper and lower sides of the arc-shaped grinding plate 9 are provided with grinding liquid spraying holes 125. The grinding liquid extraction pump 122 can work to extract the grinding liquid inside the grinding liquid storage cylinder 121. The grinding liquid is extracted and discharged into the interior of the arc cover 8 through the hard extraction tube 123 and the soft connecting tube 124, and then ejected through the grinding liquid ejection hole 125; a waterproof temperature sensor 14 is fixedly embedded in the inner wall of one of the arc covers 8, and a grinding liquid cooler 15 is provided on the wall of the hard extraction tube 123. The waterproof temperature sensor 14 can monitor the temperature changes during the grinding process in real time. The waterproof temperature sensor 14 will detect the temperature data. When the temperature reaches the set threshold, the grinding liquid cooler 15 will be started immediately. The grinding liquid cooler 15 can cool and cool the grinding liquid. Since the waterproof temperature sensor 14 cannot directly contact the rotating copper core of the ball valve, but the waterproof temperature sensor 14 is close to the copper core of the ball valve, and the arc cover 8 can play a certain role in isolating heat loss, although there is a certain amount of heat loss, this loss is small and can be ignored, and the grinding temperature detection of the copper core of the ball valve can still be completed.

[0038] The PLC controller 13 is fixedly arranged on one side of the top of the grinding table 1, and the motor 2, the copper core tightening mechanism 4, the first cylinder 7, the copper core roughness detection mechanism 10, the copper core diameter detection mechanism 11, the grinding liquid spraying mechanism 12, the waterproof temperature sensor 14 and the grinding liquid cooler 15 are all electrically connected to the PLC controller 13.

[0039] The operating principle of the present invention is described as follows: the staff first manually inputs data into the system of the PLC controller 13 according to the size specifications of the copper core of the ball valve and the required surface smoothness requirements. For example, the standard outer diameter of the copper core is 50 mm, the inner diameter of the copper core is 30 mm, and the surface roughness requirement is Ra0.8-Ra1.6 μm. Then, the copper core of the ball valve is first sleeved on the shaft wall of the rotating shaft 3. When the position of the copper core of the ball valve is aligned with the copper core tightening mechanism 4, the PLC controller 13 is operated to start the third cylinder 41 to make the third cylinder 41 The arc top plate 42 is extended to move and abut against the inner wall of the copper core of the ball valve, and the copper core of the ball valve is installed on the rotating shaft 3. When the clamp is controlled to position the copper core, the action of the clamp can be accurately controlled according to the inner diameter size data. At the same time, it is ensured that the outer diameter of the copper core of the ball valve after grinding is 50mm to meet the accuracy requirements of subsequent processing or assembly. Then, the screw-in screw 17 is rotated by hand. When the screw-in screw 17 is spirally advanced, it drives the conical top seat 18 to abut against the end of the rotating shaft 3, thereby reducing the beating and eccentricity of the rotating shaft 3 during the subsequent rotation process and improving the uniformity of grinding.

[0040] Then, the PLC controller 13 is operated to start the motor 2, the first cylinder 7 and the grinding liquid extraction pump 122 at the same time. The motor 2 can drive the rotating shaft 3 and the positioned copper core of the ball valve to rotate. The first cylinder 7 drives the arc cover 8 to move toward the copper core of the ball valve when extending. At the same time, the grinding liquid extraction pump 122 can extract the grinding liquid in the grinding liquid storage cylinder 121 and discharge it into the arc cover 8 through the hard extraction pipe 123 and the soft connecting pipe 124, and then spray it out through the grinding liquid spray hole 125. The arc grinding plate 9 will first contact with the grinding liquid and pre-treat the copper core of the ball valve before contacting, so that it can play a role immediately when grinding starts. Finally, until the arc grinding plate 9 contacts the side wall of the copper core of the ball valve and starts the grinding operation;

[0041] During the grinding process, the PLC controller 13 controls the first cylinder 7 to slowly and continuously extend, controls the grinding feed amount of the grinding plate to the copper core of the ball valve, makes the grinding plate contact with the surface of the copper core of the ball valve at a certain pressure and speed, and then cooperates with the cutting effect of the coarse particles in the grinding liquid to remove the machining allowance and uneven parts on the surface of the copper core of the ball valve, and quickly reduces the surface roughness;

[0042] As the grinding progresses, the staff operates the PLC controller 13 to start the second cylinder 102, the laser displacement sensor 105 and the laser detector 107. When the second cylinder 102 is extended, it drives the light shield 103 to move downward, so that the bottom of the light shield 103 is close to the copper core of the ball valve, until the annular nylon brush 108 contacts the top of the copper core of the ball valve and then stops the action of the second cylinder 102. The annular nylon brush 108 has a certain degree of softness and adsorption. The grinding liquid stains on the surface of the copper core of the ball valve can be removed by adsorption and wiping. For the dust generated by grinding, the bristles of the nylon brush can sweep up the dust and adsorb part of it, thereby achieving the cleaning effect. At this time, the laser displacement sensor 105 emits a laser beam to the surface of the copper core of the ball valve, and uses the principle of optical triangulation to calculate the distance from the copper core surface of the ball valve to the sensor according to the spot position of the reflected light on the detector. During the scanning measurement process, the microscopic ups and downs caused by the surface roughness cause the distance value to change. The roughness parameter is obtained through analysis and calculation. The laser detector 107 is used to monitor the laser beam to ensure that it normally irradiates the copper core surface, and can also cooperate with the laser displacement sensor 105 to accurately control the measurement position. Since the surface roughness of the copper core of the ball valve is relatively large at the beginning and there are many uneven positions, the angle of the reflected light of the laser displacement sensor 105 will change due to the irregularity of the surface. The large change causes the spot position of the reflected light on the detector inside the sensor to change continuously. From the detection value, the measured distance data will fluctuate frequently, and the distance difference between adjacent measurement points will be large. The position sensitive detector inside the laser displacement sensor 105 converts the reflected light signal into an electrical signal and sends it to the PLC controller 13 after amplification. After receiving the electrical signal feedback, the PLC controller 13 controls to increase the extension speed of the first cylinder 7 accordingly (for example, the initial extension speed is 1.2 mm / min, and the corresponding extension speed is increased to 1.5 mm / min according to the detected roughness). As the surface roughness of the copper core of the ball valve changes from The change from high to low results in a reduction in the uneven position of the surface of the copper core of the ball valve, a reduction in the fluctuation of the distance data measured by the laser displacement sensor 105, and a reduction in the distance difference between adjacent measuring points. At this time, the PLC controller 13 will gradually reduce the extension speed of the first cylinder 7 (the extension speed range is 0.5-2.0 mm / min) until the surface roughness of the copper core of the ball valve is qualified, thereby realizing the function of real-time detection of the surface smoothness of the copper core of the ball valve during the grinding process, and being able to adaptively adjust the grinding feed amount, avoiding the phenomenon of surface quality degradation and aggravated wear of the arc-shaped grinding plate 9 caused by excessive grinding feed amount, thereby improving product quality and production efficiency;

[0043] During the feeding and grinding process, the two arc covers 8 will gradually approach each other, which can drive the insulating pull rods 115 on the two connecting rods 116 to approach each other. At the same time, the two detection conductive rings 114 move on the detection resistor rod 113 and approach each other, so that the resistance of the detection resistor rod 113 connected to the circuit is reduced. By connecting the measurement circuit at both ends of the detection resistor rod 113, the change of the current signal at both ends of the detection resistor rod 113 can be detected, and then the electrical signal is sent to the PLC controller 13 after amplification and filtering. When the size of the electrical signal reaches the threshold value preset in the PLC controller 13, the PLC controller 13 will immediately stop the extension action of the first cylinder 7, so as to avoid the phenomenon that the arc grinding plate 9 over-grinds the copper core of the ball valve, thereby reducing the defective rate and production cost of the product.

[0044] During the grinding process, the surface roughness of the copper core of the ball valve may reach the qualified standard, but the outer diameter of the copper core of the ball valve has not reached the qualified standard. According to the detection value of the laser displacement sensor 105 and the fact that the first cylinder 7 has not stopped extending, the PLC controller 13 will continue to control the first cylinder 7 to extend at the lowest speed (0.5mm / min) until the arc-shaped grinding plate 9 grinds the outer diameter of the copper core of the ball valve to meet the standard requirements (the roughness standard requirement range is Ra0.8-Ra1.6μm);

[0045] In addition, the surface roughness of the copper core of the ball valve may not meet the qualified standard, but the outer diameter of the copper core of the ball valve has met the qualified standard. According to the detection value of the laser displacement sensor 105 and the fact that the first cylinder 7 has stopped extending, the PLC controller 13 will stop the first cylinder 7 from extending and increase the surface grinding time of the copper core of the ball valve by the arc grinding plate 9 until the surface roughness of the copper core of the ball valve is ground by the arc grinding plate 9 to meet the standard requirements (the range of the roughness standard requirements is Ra0.8-Ra1.6μm).

[0046] During the grinding process, the waterproof temperature sensor 14 provided on the inner wall of the arc cover 8 can sense the heat emitted by the copper core, thereby obtaining its grinding temperature information. The waterproof temperature sensor 14 will transmit the detected temperature data to the PLC controller 13 in real time. When the temperature reaches the threshold value preset in the PLC controller 13, the PLC controller 13 will immediately start the grinding liquid refrigerator 15, and the grinding liquid refrigerator 15 will then cool and cool the grinding liquid inside the hard extraction tube 123, so as to avoid the copper core of the ball valve and the arc-shaped grinding plate 9 from being thermally deformed due to excessive temperature during the grinding process, thereby affecting the grinding accuracy, and at the same time prevent the grinding liquid from being degraded due to high temperature, thereby ensuring stable and efficient grinding work. In addition, after use, the grinding liquid will fall into the liquid receiving tank 19 due to gravity, and the impurities in the grinding liquid can be filtered through the filter 20, and the collected grinding liquid can be recycled by the drain pipe 21;

[0047] After the copper core of the ball valve is ground to be qualified, the staff operates the PLC controller 13 to stop the equipment and grind and disassemble the copper core of the valve for subsequent cleaning.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve copper core grinding device, comprising a grinding table (1), a motor (2), a rotating shaft (3) and a copper core pressing mechanism (4), wherein a first support plate (5) is fixedly provided on one side of the top of the grinding table (1), the motor (2) is fixedly provided on the side of the first support plate (5), one end of the rotating shaft (3) is fixedly connected to the output end of the motor (2), and the copper core pressing mechanism (4) is provided on the shaft wall of the rotating shaft (3), characterized in that: Also includes: Two second support plates (6) are symmetrically fixedly arranged on both sides of the top of the grinding table (1); the sides of the two second support plates (6) are fixedly provided with first cylinders (7); the moving ends of the two first cylinders (7) are fixedly provided with arc covers (8); the inner side walls of the two arc covers (8) are fixedly provided with arc grinding plates (9); the two arc grinding plates (9) are located on both sides of the copper core tightening mechanism (4); A copper core roughness detection mechanism (10) is fixedly arranged on the top of the first support plate (5), and the copper core roughness detection mechanism (10) extends to the top of the copper core tightening mechanism (4); A copper core diameter detection mechanism (11) is fixedly arranged between the two second support plates (6), and the copper core diameter detection mechanism (11) is located below the copper core tightening mechanism (4); A grinding liquid spraying mechanism (12) is fixedly arranged on one side of the top of the grinding table (1), and the spraying end of the grinding liquid spraying mechanism (12) is fixedly connected to the tops of the two arc-shaped covers (8) respectively; A PLC controller (13) is fixedly arranged on one side of the top of the grinding table (1); the motor (2), the copper core tightening mechanism (4), the first cylinder (7), the copper core roughness detection mechanism (10), the copper core diameter detection mechanism (11) and the grinding liquid ejection mechanism (12) are all electrically connected to the PLC controller (13).

2. A valve copper core grinding device according to claim 1, characterized in that: The copper core roughness detection mechanism (10) comprises a third support plate (101) fixedly arranged on the top of the first support plate (5), and the third support plate (101) is an L-shaped plate, a second cylinder (102) is fixedly arranged on the top of the third support plate (101), a light shield (103) is fixedly arranged on the movable end of the second cylinder (102), a mounting plate (104) is fixedly arranged inside the light shield (103), a laser displacement sensor (105) is fixedly arranged at the center of the mounting plate (104), both sides of the lower surface of the mounting plate (104) are fixedly arranged with inclined mounting plates (106), the lower surfaces of the two mounting plates (106) are fixedly arranged with laser detectors (107), and an annular nylon brush (108) is fixedly arranged at the bottom of the light shield (103).

3. A valve copper core grinding device according to claim 1, characterized in that: The copper core diameter detection mechanism (11) comprises a detection cylinder (111) located between the two second support plates (6); fixed rods (112) are fixedly provided between the two ends of the detection cylinder (111) and the two second support plates (6); a detection resistor rod (113) is fixedly provided inside the detection cylinder (111) in a transverse direction; a detection conductive ring (114) is symmetrically slidably provided on the rod wall of the detection resistor rod (113); insulating pull rods (115) are sealed and slidably provided at both ends of the detection cylinder (111); connecting rods (116) are fixedly provided on the bottom side walls of the two arc-shaped covers (8); one end of the two insulating pull rods (115) is fixedly connected to the side walls of the two detection conductive rings (114), and the other end of the two insulating pull rods (115) is fixedly connected to the lower ends of the two connecting rods (116).

4. A valve copper core grinding device according to claim 1, characterized in that: The grinding liquid ejection mechanism (12) comprises a grinding liquid storage cylinder (121) fixedly arranged on the top of the grinding table (1), a grinding liquid extraction pump (122) fixedly arranged inside the grinding liquid storage cylinder (121), a hard extraction pipe (123) fixedly arranged at the output end of the grinding liquid extraction pump (122), one end of the hard extraction pipe (123) away from the grinding liquid extraction pump (122) extends to the outside of the grinding liquid storage cylinder (121) and is fixedly provided with two soft connecting pipes (124), one end of the two soft connecting pipes (124) away from the hard extraction pipe (123) is respectively fixedly connected to the top of the two arc covers (8), the two arc covers (8) are both hollow structures, and the inner walls of the two arc covers (8) and located on the upper and lower sides of the arc grinding plate (9) are provided with grinding liquid ejection holes (125).

5. A valve copper core grinding device according to claim 4, characterized in that: A waterproof temperature sensor (14) is fixedly embedded in the inner wall of one of the arc-shaped covers (8), and a grinding liquid cooler (15) is provided on the wall of the hard extraction tube (123). Both the waterproof temperature sensor (14) and the grinding liquid cooler (15) are electrically connected to the PLC controller (13).

6. A valve copper core grinding device according to claim 1, characterized in that: A fourth support plate (16) is fixedly provided on the top of the grinding table (1) and on a side away from the first support plate (5); a screw-in screw (17) is threadedly provided on the side surface of the fourth support plate (16); a conical top seat (18) is rotatably provided at one end of the screw-in screw (17); and a tip end of the conical top seat (18) is disposed against one end of the rotating shaft (3).

7. A valve copper core grinding device according to claim 1, characterized in that: A liquid receiving trough (19) is fixedly provided on the top of the grinding table (1) and below the two copper core tightening mechanisms (4); a filter screen (20) is fixedly provided at the opening of the liquid receiving trough (19); a liquid drain pipe (21) extending to below the grinding table (1) is fixedly provided at the bottom of the liquid receiving trough (19); and a switch valve (22) is provided on the wall of the liquid drain pipe (21).

8. A valve copper core grinding device according to claim 1, characterized in that: The copper core tightening mechanism (4) comprises a third cylinder (41) symmetrically fixedly arranged on the shaft wall of the rotating shaft (3), and a curved top plate (42) is fixedly arranged at the movable end of the third cylinder (41). The rotating shaft (3) is a hollow shaft, and an air supply rotary joint (43) is arranged at one end of the rotating shaft (3).

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