Accurate and controllable valve seat grinding device

Abstract

The utility model relates to a precise and controllable valve seat grinding device, and relates to the technical field of valve seat grinding, the precise and controllable valve seat grinding device comprises a grinding workbench, a mounting bracket is fixedly mounted on the grinding workbench, and a grinding motor is arranged on the mounting bracket in a lifting manner; and a control panel, a clamping mechanism, a driving module and a grinding control module. The levelness of the sealing face of the grinding valve seat can be guaranteed, and meanwhile the contact pressure and the grinding duration between the grinding disc and the sealing face are accurately controlled.

Description

Technical Field

[0001] The present application relates to the field of valve seat grinding technology, and in particular to a precise and controllable valve seat grinding device. Background Art

[0002] The valve seat and valve disc are important components to ensure the sealing of the breathing valve. Traditional breathing valves are generally carbon steel castings or cast aluminum valve bodies. The valve seat and valve body are integrally cast carbon steel. The rough surface of the valve seat sealing surface is prone to rust and corrosion after long-term use. Therefore, during the maintenance of the breathing valve, it is often necessary to remove the valve seat of the breathing valve and grind the sealing surface.

[0003] In the prior art, the valve seat of the breathing valve is mainly ground manually. When grinding the valve seat, the valve seat needs to be fixed in advance, and the grinding disc matching the valve seat diameter needs to be installed on the grinding rod by bolts, and then the grinding rod is installed on the connecting head of the grinding motor. After sticking sandpaper (or applying grinding paste) on the bottom of the grinding disc, the operator extends the grinding disc into the valve seat so that the sandpaper fits the sealing surface on the valve seat, starts the grinding motor, drives the grinding rod and the grinding disc to rotate, and drives the sandpaper to rub the sealing surface.

[0004] However, it is difficult to ensure the horizontality of the grinding disc by manually controlling and adjusting the position of the grinding disc by the operator, which can easily cause the sealing surface to tilt and affect the recovery effect of the breathing valve during use. There is room for improvement. Utility Model Content

[0005] In order to ensure the horizontality of the grinding valve seat sealing surface and accurately control the contact pressure between the grinding disc and the sealing surface and the grinding time, the present application provides a precise and controllable valve seat grinding device.

[0006] The present application provides a precise and controllable valve seat grinding device adopts the following technical solution:

[0007] A precise and controllable valve seat grinding device comprises a grinding workbench, a mounting bracket is fixedly mounted on the grinding workbench, a grinding motor is lifted and lowered on the mounting bracket; and:

[0008] A control panel, fixedly mounted on the grinding workbench, for inputting a start signal, a set pressure signal, and a set duration signal;

[0009] A clamping mechanism, fixedly mounted on the grinding workbench, located directly below the grinding motor, connected to the signal output terminal of the control panel, and used for receiving the start signal and clamping the fixed valve seat;

[0010] A driving module, mounted on the mounting bracket, with a driving end fixedly connected to the grinding motor and connected to a signal output end of the control panel, for receiving the start signal and driving the grinding disc to move toward or away from the sealing surface of the valve seat;

[0011] The grinding control module is installed on the grinding disc and is connected to the signal output terminal of the control panel for receiving the start signal, the set pressure signal, the set time signal and controlling the grinding motor to grind the valve seat sealing surface.

[0012] By adopting the above technical scheme, when the operator uses the grinding device to grind the valve seat, the valve seat can be fixed directly below the grinding motor through the clamping mechanism, and then the grinding rod, grinding disc, etc. are installed on the connecting head of the grinding motor. The contact pressure between the grinding disc and the sealing surface and the grinding time of the sealing surface are set through the control panel, and then the start signal command is input. After the driving module drives the sandpaper at the bottom of the grinding disc to abut against the sealing surface, the grinding control module controls the contact pressure between the grinding disc and the sealing surface, and controls the grinding time at the same time, so as to accurately control the contact pressure and grinding time between the grinding disc and the sealing surface. At the same time, during the grinding process, the driving module drives the grinding disc under the grinding motor to stay in a fixed position, which can effectively ensure the levelness of the grinding disc and reduce the occurrence of tilting of the sealing surface due to uneven force.

[0013] Preferably, a positioning seat for placing the valve seat is installed on the grinding workbench, and a dust collecting groove is provided on the positioning seat;

[0014] The clamping mechanism comprises a plurality of angle cylinders, and the cylinder bodies of the plurality of angle cylinders are fixedly mounted on the table surface of the grinding workbench;

[0015] The signal input ends of the plurality of angle cylinders are connected to the signal output ends of the control panel, and the plurality of angle cylinders receive the start signal and drive the pressing plate to rotate and press the valve seat.

[0016] By adopting the above technical solution, when the valve seat needs to be ground, the operator can first place the valve seat on the positioning seat. When the operator inputs the start signal through the control panel, the angle cylinder rotates the pressure plate and pulls down the pressure plate so that the valve seat is fixed on the positioning seat, thereby achieving the technical effect of automatically clamping the valve seat.

[0017] Preferably, the driving module comprises a hydraulic cylinder, a cylinder body of the hydraulic cylinder is fixedly connected to the mounting bracket, and a driving shaft of the hydraulic cylinder is fixedly connected to the body of the grinding motor.

[0018] By adopting the above technical solution, the hydraulic cylinder extends or retracts the drive shaft, which can drive the grinding motor to rise and fall, and drive the grinding rod and grinding disc connected to the grinding motor to move.

[0019] Preferably, the grinding control module comprises:

[0020] A pressure control unit is installed on the grinding disc and is connected to the signal output terminal of the control panel, and is used to receive the start signal and detect the contact pressure between the grinding disc and the sealing surface, and output a first control signal when the contact pressure reaches a set pressure;

[0021] A duration control unit, whose signal input end is connected to the pressure control unit and the signal output end of the control panel, is used to receive the first control signal and start timing, and output a second control signal when the actual grinding time reaches the set time;

[0022] The signal input end of the hydraulic cylinder is connected to the signal output ends of the pressure control unit and the duration control unit, and the hydraulic cylinder receives the first control signal and stops extending the drive shaft, and receives the second control signal and retracts the drive shaft;

[0023] The signal input end of the grinding motor is connected to the signal output ends of the pressure control unit and the duration control unit. The grinding motor receives the first control signal and starts, and the grinding motor receives the second control signal and stops.

[0024] By adopting the above technical scheme, through the coordination and use of the pressure control unit and the time control unit, the technical effects of automatically controlling the contact pressure between the grinding disc and the sealing surface, automatically controlling the grinding time, and automatically controlling the extension or retraction of the hydraulic cylinder drive shaft can be achieved.

[0025] Preferably, the pressure control unit comprises:

[0026] A pressure sensor, fixedly mounted on the bottom of the grinding disc, connected to the signal output terminal of the control panel, for receiving the start signal and detecting the contact pressure between the grinding disc and the sealing surface, and outputting a contact pressure signal;

[0027] The first single chip microcomputer is connected to the pressure sensor and the signal output terminal of the control panel, and is used for receiving and comparing the set pressure signal and the contact pressure signal, and outputting the first control signal when the contact pressure reaches the set pressure.

[0028] By adopting the above technical solution, when the hydraulic cylinder extends the cylinder shaft to drive the grinding disc to contact the sealing surface, the pressure sensor detects the contact pressure between the bottom of the grinding disc and the sealing surface of the valve seat in real time. After comparison by the first single-chip microcomputer, when the contact pressure reaches the set pressure, the first single-chip microcomputer can control the hydraulic cylinder to stop driving the grinding disc to move, thereby achieving the technical effect of accurately controlling the contact pressure between the grinding disc and the sealing surface.

[0029] Preferably, the duration control unit includes:

[0030] A timer, connected to the signal output terminal of the first single-chip microcomputer, configured to receive the first control signal, start timing, and output a grinding time signal;

[0031] The second single chip microcomputer is connected to the control panel and the signal output end of the timer, and is used to receive and compare the grinding time signal and the set time signal, and output the second control signal when the grinding time reaches the set time.

[0032] By adopting the above technical solution, through the combination and use of the timer and the second single-chip computer, the grinding time can be timed, and when the grinding time reaches the set time, the grinding motor can be automatically controlled to stop and the hydraulic cylinder can be controlled to retract the drive shaft, thereby achieving the technical effect of accurately controlling the grinding time.

[0033] Preferably, a vacuum cleaner is fixedly connected to the grinding workbench, and the vacuum cleaner is connected to a dust collecting duct;

[0034] The grinding workbench is provided with a mounting hole, and the dust collecting air duct is fixedly installed in the mounting hole.

[0035] By adopting the above technical solution, the vacuum cleaner can recover the dust that falls into the dust collecting tank during the grinding of the sealing surface, which can improve the convenience of the operator in cleaning the grinding workbench.

[0036] Preferably, the groove wall of the dust collecting groove is arranged to be inclined inward along the direction close to the dust collecting air duct.

[0037] By adopting the above technical solution, the dust collecting groove is tilted inwardly, which can reduce the dust generated during the grinding of the sealing surface and the situation where the dust is retained in the dust collecting groove.

[0038] In summary, the precise and controllable valve seat grinding device of the present application includes at least one of the following beneficial technical effects:

[0039] 1. Through the coordination and use of the control panel, hydraulic cylinder, angle cylinder, pressure sensor, first single-chip microcomputer, timer and second single-chip microcomputer, the operator can input the set pressure of the contact between the grinding disc and the sealing surface and the set grinding time of the grinding disc on the sealing surface through the control panel, and after the grinding time reaches the set time, the grinding motor can be controlled to stop running, and the hydraulic cylinder can be controlled to drive the grinding motor, the grinding rod connected to the grinding motor, and the grinding disc to rise together. During the grinding process, the grinding disc is in a constant position and remains parallel to the sealing surface, which can ensure the horizontality of the sealing surface while accurately controlling the contact pressure between the grinding disc and the sealing surface and the grinding time;

[0040] 2. By using the dust collecting duct and the vacuum cleaner together, the dust that falls into the dust collecting groove of the positioning seat during the grinding of the sealing surface can be recovered, which improves the convenience of the operator to clean the grinding workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of an embodiment of the present application for illustrating the overall structure of a grinding device.

[0042] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle is mainly used to show the grinding seat

[0043] Figure 3 It is a schematic diagram of an embodiment of the present application for demonstrating the internal signal transmission of a grinding device.

[0044] Explanation of the reference numerals: 1. Grinding workbench; 11. Control panel; 12. Positioning seat; 13. Dust collecting tank; 14. Dust collecting duct; 15. Mounting hole; 2. Mounting bracket; 3. Grinding motor; 31. Connector; 4. Valve seat; 41. Sealing surface; 5. Clamping mechanism; 51. Angle cylinder; 6. Drive module; 61. Hydraulic cylinder; 7. Grinding control module; 71. Pressure sensor; 8. Grinding disc. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-3 This application is described in further detail.

[0046] The present application discloses a precise and controllable valve seat grinding device. Figure 1 and Figure 3 It mainly includes a grinding workbench 1, on which a mounting bracket 2 is fixedly mounted, and on which a grinding motor 3 is lifted and lowered.

[0047] And: a control panel 11, fixedly mounted on the grinding workbench 1, for inputting a start signal, a set pressure signal, and a set duration signal; a clamping mechanism 5, fixedly mounted on the grinding workbench 1, located directly below the grinding motor 3, and connected to the signal output end of the control panel 11, for receiving a start signal and clamping the fixed valve seat 4; a driving module 6, mounted on the mounting bracket 2, with a driving end fixedly connected to the grinding motor 3, and connected to the signal output end of the control panel 11, for receiving a start signal and driving the grinding disc 8 to move toward or away from the sealing surface 41 of the valve seat 4; a grinding control module 7, mounted on the grinding disc 8, and connected to the signal output end of the control panel 11, for receiving a start signal, a set pressure signal, a set duration signal, and controlling the grinding motor 3 to grind the sealing surface 41 of the valve seat 4.

[0048] When the operator uses the grinding device to grind the valve seat 4, the valve seat 4 can be fixed directly below the grinding motor 3 through the clamping mechanism 5, and then the grinding rod, grinding disc 8, etc. are installed on the connecting head 31 of the grinding motor 3. The contact pressure between the grinding disc 8 and the sealing surface 41 and the grinding time of the sealing surface 41 are set through the control panel 11, and then the start signal instruction is input. After the driving module 6 drives the sandpaper at the bottom of the grinding disc 8 to abut against the sealing surface 41, the grinding control module 7 controls the contact pressure between the grinding disc 8 and the sealing surface 41, and controls the grinding time at the same time, so as to accurately control the contact pressure and grinding time between the grinding disc 8 and the sealing surface 41. At the same time, during the grinding process, the driving module 6 drives the grinding disc 8 under the grinding motor 3 to stay in a fixed position, which can effectively ensure the levelness of the grinding disc 8 and reduce the occurrence of the sealing surface 41 being tilted due to uneven force.

[0049] Reference Figure 1 A positioning seat 12 for placing the valve seat 4 is installed on the grinding workbench 1, and a dust collecting groove 13 is opened on the positioning seat 12; the clamping mechanism 5 includes a plurality of angle cylinders 51, and the cylinder bodies of the plurality of angle cylinders 51 are fixedly installed on the table surface of the grinding workbench 1; the signal input ends of the plurality of angle cylinders 51 are connected with the signal output ends of the control panel 11, and the plurality of angle cylinders 51 receive the start signal and drive the pressure plate to rotate and press the valve seat 4.

[0050] When the valve seat 4 needs to be ground, the operator can first place the valve seat 4 on the positioning seat 12. When the operator inputs a start signal through the control panel 11, the angle cylinder 51 rotates the pressure plate and pulls down the pressure plate so that the valve seat 4 is fixed on the positioning seat 12, thereby achieving the technical effect of automatically clamping the valve seat 4.

[0051] Reference Figure 1 and Figure 3 In the embodiment of the present application, the driving module 6 adopts a hydraulic cylinder 61 , the cylinder body of the hydraulic cylinder 61 is fixedly connected to the mounting bracket 2 , and the driving shaft of the hydraulic cylinder 61 is fixedly connected to the body of the grinding motor 3 .

[0052] The hydraulic cylinder 61 extends or retracts the driving shaft, which can drive the grinding motor 3 to move up and down, and drive the grinding rod and grinding disc 8 connected to the grinding motor 3 to move.

[0053] Reference Figure 2 and Figure 3The grinding control module 7 includes: a pressure control unit, which is installed on the grinding disc 8 and is signal-connected to the signal output end of the control panel 11, for receiving a start signal and detecting the contact pressure between the grinding disc 8 and the sealing surface 41, and outputting a first control signal when the contact pressure reaches a set pressure; a duration control unit, whose signal input end is signal-connected to the pressure control unit and the signal output end of the control panel 11, for receiving the first control signal and starting timing, and outputting a second control signal when the actual grinding duration reaches the set duration.

[0054] The signal input end of the hydraulic cylinder 61 is connected to the signal output ends of the pressure control unit and the duration control unit. The hydraulic cylinder 61 receives a first control signal and stops extending the drive shaft, and receives a second control signal and retracts the drive shaft.

[0055] The signal input end of the grinding motor 3 is signal-connected to the signal output ends of the pressure control unit and the duration control unit. The grinding motor 3 receives the first control signal and starts, and the grinding motor 3 receives the second control signal and stops.

[0056] By coordinating and using the pressure control unit and the time control unit, the technical effects of automatically controlling the contact pressure between the grinding disc 8 and the sealing surface 41, automatically controlling the grinding time, and automatically controlling the extension or retraction of the driving shaft of the hydraulic cylinder 61 can be achieved.

[0057] Reference Figure 2 and Figure 3 The pressure control unit includes: a pressure sensor 71, which is fixedly installed at the bottom of the grinding disc 8 and is signal-connected to the signal output end of the control panel 11, for receiving a start signal and detecting the contact pressure between the grinding disc and the sealing surface 41, and outputting a contact pressure signal; a first single-chip microcomputer, which is signal-connected to the pressure sensor 71 and the signal output end of the control panel 11, for receiving and comparing a set pressure signal and a contact pressure signal, and outputting a first control signal when the contact pressure reaches the set pressure.

[0058] When the hydraulic cylinder 61 extends the cylinder shaft to drive the grinding disk 8 to contact the sealing surface 41, the pressure sensor 71 detects the contact pressure between the bottom of the grinding disk 8 and the sealing surface 41 of the valve seat 4 in real time. After comparison by the first single-chip computer, when the contact pressure reaches the set pressure, the first single-chip computer can control the hydraulic cylinder 61 to stop driving the grinding disk 8 to move, thereby achieving the technical effect of accurately controlling the contact pressure between the grinding disk 8 and the sealing surface 41.

[0059] Reference Figure 3The time control unit includes: a timer, which is connected to the signal output end of the first single-chip microcomputer, used to receive the first control signal and start timing, and output a grinding time signal; a second single-chip microcomputer, which is connected to the control panel 11 and the signal output end of the timer, used to receive the grinding time signal, set the time signal and compare it, and output a second control signal when the grinding time reaches the set time.

[0060] By matching and using the timer and the second single-chip computer, the grinding time can be timed, and when the grinding time reaches the set time, the grinding motor 3 can be automatically stopped and the hydraulic cylinder 61 can be controlled to retract the drive shaft, thereby achieving the technical effect of accurately controlling the grinding time.

[0061] In the embodiment of the present application, a vacuum cleaner is fixedly connected to the grinding workbench 1 , and a dust collecting duct 14 is connected to the vacuum cleaner. A mounting hole 15 is penetrated through the grinding workbench 1 , and the dust collecting duct 14 is fixedly installed in the mounting hole 15 .

[0062] The vacuum cleaner can collect the dust that falls into the dust collecting groove 13 during the grinding process of the sealing surface 41 , thereby improving the convenience for the operator to clean the grinding workbench 1 .

[0063] Reference Figure 2 The wall of the dust collecting groove 13 is inclined inwardly arranged in a direction close to the dust collecting air duct 14. The dust collecting groove 13 is inclined inwardly arranged to reduce the dust generated during the grinding of the sealing surface 41 from being retained in the dust collecting groove 13.

[0064] Among them, the grinding workbench 1 is provided with a mounting groove adapted to the positioning seat 12, and the mounting hole 15 is connected to the mounting groove. After grinding is completed, the operator can push the dust on the surface of the grinding workbench 1 into the mounting groove for unified recovery.

[0065] The implementation principle of a precise and controllable valve seat grinding device in the embodiment of the present application is as follows: through the mutual coordination and use of the control panel 11, the hydraulic cylinder 61, the angle cylinder 51, the pressure sensor 71, the first single-chip computer, the timer and the second single-chip computer, the operator can input the set pressure of the contact between the grinding disc 8 and the sealing surface 41 and the set grinding time of the grinding disc 8 on the sealing surface 41 through the control panel 11, and after the grinding time reaches the set time, the grinding motor 3 can be controlled to stop running, and the hydraulic cylinder 61 can be controlled to drive the grinding motor 3, and the grinding rod connected to the grinding motor 3 and the grinding disc 8 can be raised together. During the grinding process, the position of the grinding disc 8 is constant and remains parallel to the sealing surface 41, so that the horizontality of the sealing surface 41 can be ensured while the contact pressure between the grinding disc 8 and the sealing surface 41 and the grinding time can be precisely controlled.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A precise and controllable valve seat grinding device, characterized in that: It comprises a grinding workbench (1), on which a mounting bracket (2) is fixedly mounted, and on which a grinding motor (3) is lifted and lowered; as well as: A control panel (11), fixedly mounted on the grinding workbench (1), for inputting a start signal, a set pressure signal, and a set duration signal; A clamping mechanism (5) is fixedly mounted on the grinding workbench (1), is located directly below the grinding motor (3), is signal-connected to the signal output end of the control panel (11), and is used to receive the start signal and clamp the fixed valve seat (4); A drive module (6) is mounted on the mounting bracket (2), a drive end of which is fixedly connected to the grinding motor (3) and is signal-connected to a signal output end of the control panel (11), and is used to receive the start signal and drive the grinding disc (8) to move in a direction close to or away from a sealing surface (41) of the valve seat (4); A grinding control module (7) is mounted on the grinding disc (8) and is signal-connected to the signal output end of the control panel (11), and is used to receive the start signal, the set pressure signal, and the set time signal and control the grinding motor (3) to grind the sealing surface (41) of the valve seat (4).

2. A precise and controllable valve seat grinding device according to claim 1, characterized in that: The grinding workbench (1) is provided with a positioning seat (12) for placing the valve seat (4), and the positioning seat (12) is provided with a dust collecting groove (13); The clamping mechanism (5) comprises a plurality of angle cylinders (51), and the cylinder bodies of the plurality of angle cylinders (51) are fixedly mounted on the table surface of the grinding workbench (1); The signal input ends of the plurality of angle cylinders (51) are signal-connected to the signal output ends of the control panel (11); the plurality of angle cylinders (51) receive the start signal and drive the pressure plate to rotate and press the valve seat (4).

3. A precise and controllable valve seat grinding device according to claim 2, characterized in that: The driving module (6) comprises a hydraulic cylinder (61), a cylinder body of the hydraulic cylinder (61) being fixedly connected to the mounting bracket (2), and a driving shaft of the hydraulic cylinder (61) being fixedly connected to the body of the grinding motor (3).

4. A precise and controllable valve seat grinding device according to claim 3, characterized in that: The grinding control module (7) comprises: A pressure control unit, mounted on the grinding disc (8), signal-connected to a signal output terminal of the control panel (11), for receiving the start signal and detecting the contact pressure between the grinding disc (8) and the sealing surface (41), and outputting a first control signal when the contact pressure reaches a set pressure; A time control unit, whose signal input end is connected to the pressure control unit and the signal output end of the control panel (11), is used to receive the first control signal and start timing, and output a second control signal when the actual grinding time reaches the set time; The signal input end of the hydraulic cylinder (61) is connected to the signal output ends of the pressure control unit and the duration control unit, and the hydraulic cylinder (61) receives the first control signal and stops extending the drive shaft, and receives the second control signal and retracts the drive shaft; The signal input end of the grinding motor (3) is signal-connected to the signal output ends of the pressure control unit and the duration control unit. The grinding motor (3) receives the first control signal and starts, and the grinding motor (3) receives the second control signal and stops.

5. A precise and controllable valve seat grinding device according to claim 4, characterized in that: The pressure control unit comprises: A pressure sensor (71) is fixedly mounted on the bottom of the grinding disc (8) and is signal-connected to the signal output end of the control panel (11), and is used to receive the start signal and detect the contact pressure between the grinding disc and the sealing surface (41), and output a contact pressure signal; The first single chip microcomputer is signal-connected to the pressure sensor (71) and the signal output end of the control panel (11), and is used to receive and compare the set pressure signal and the contact pressure signal, and output the first control signal when the contact pressure reaches the set pressure.

6. A precise and controllable valve seat grinding device according to claim 5, characterized in that: The duration control unit comprises: A timer, connected to the signal output terminal of the first single-chip microcomputer, configured to receive the first control signal, start timing, and output a grinding time signal; The second single chip computer is connected to the control panel (11) and the signal output end of the timer, and is used to receive and compare the grinding time signal and the set time signal, and output the second control signal when the grinding time reaches the set time.

7. A precise and controllable valve seat grinding device according to claim 2, characterized in that: A dust collector is fixedly connected to the grinding workbench (1), and the dust collector is connected to a dust collecting air duct (14); The grinding workbench (1) is provided with a mounting hole (15) extending therethrough, and the dust collecting air duct (14) is fixedly mounted in the mounting hole (15).

8. A precise and controllable valve seat grinding device according to claim 7, characterized in that: The groove wall of the dust collecting groove (13) is arranged to be inclined inwards in a direction close to the dust collecting air duct (14).

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