Valve grinding apparatus

Abstract

The application discloses a valve grinding device and relates to the technical field of valve grinding, which comprises a driving mechanism, a transmission mechanism, a first output shaft and a second output shaft, and a grinding piece can be installed on each of the first output shaft and the second output shaft; wherein the first output shaft is in transmission connection with the second output shaft through the transmission mechanism, the driving mechanism can drive the first output shaft to rotate, so that the grinding piece installed on the first output shaft grinds the conical grinding surface of a valve, and the driving mechanism can drive the second output shaft to rotate and revolve around a revolution axis, so that the grinding piece installed on the second output shaft grinds the planar grinding surface of the valve. The application can realize double-shaft output, grind the planar sealing surface and the conical sealing surface of the valve respectively, and better meet the grinding requirements of the planar sealing surface and the conical sealing surface.

Description

Technical Field

[0001] This invention relates to the field of valve grinding technology, and in particular to a valve grinding apparatus. Background Technology

[0002] In industries such as power and petrochemicals, maintenance work requires grinding the flat and conical sealing surfaces of valves. This grinding process is labor-intensive and requires high precision. The flat sealing surfaces require high flatness, while the conical sealing surfaces require high coaxiality. Currently, most valve grinding machines are portable and have only one output shaft connected to the grinding disc. This output shaft is used for grinding both flat and conical sealing surfaces, making it difficult to meet the grinding requirements of both surfaces simultaneously.

[0003] Therefore, there is an urgent need to provide a valve grinding device to solve the above-mentioned problems existing in the prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a valve grinding device to solve the problems existing in the prior art. It can achieve dual-axis output and grind the flat sealing surface and the conical sealing surface of the valve respectively, so as to better meet the grinding requirements of the flat sealing surface and the conical sealing surface.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a valve grinding device, including a drive mechanism, a transmission mechanism, a first output shaft, and a second output shaft. A grinding element can be mounted on both the first and second output shafts. The first and second output shafts are connected by the transmission mechanism. The drive mechanism can drive the first output shaft to rotate, so that the grinding element mounted on the first output shaft grinds the conical grinding surface of the valve. The drive mechanism can also drive the second output shaft to rotate and revolve around a revolution axis, so that the grinding element mounted on the second output shaft grinds the planar grinding surface of the valve.

[0007] Preferably, the driving mechanism is a servo motor, and the output shaft of the servo motor can be connected to the first output shaft.

[0008] Preferably, a speed reducer is also provided on the output shaft of the servo motor.

[0009] Preferably, the first output shaft is coaxial with the output shaft of the drive mechanism, and the second output shaft is parallel to the first output shaft.

[0010] Preferably, the transmission mechanism is a gear transmission mechanism, which is installed in a gearbox. The first output shaft and the second output shaft are both rotatably installed in the gearbox, and the bottom of the first output shaft and the second output shaft both extend out of the gearbox.

[0011] Preferably, the gear transmission mechanism includes a first rotating gear, a first revolving gear, a second rotating gear, and a second revolving gear. The first rotating gear and the first revolving gear are sequentially mounted on the first output shaft along its axial direction. The second rotating gear is rotatably mounted on the gearbox and meshes with the first rotating gear. The second rotating gear is connected to the top of the second output shaft via a universal joint. The second revolving gear is rotatably mounted on the gearbox and meshes with the first revolving gear. The second output shaft is rotatably mounted on the second revolving gear and is eccentrically positioned relative to the second revolving gear.

[0012] Preferably, a first connecting shaft is coaxially mounted on one end of the first output shaft extending out of the gearbox. The first connecting shaft is used to mount the grinding part. The first connecting shaft is mounted inside the first output shaft by a limiting mechanism. The limiting mechanism can restrict the relative rotation between the first connecting shaft and the first output shaft and can allow the first connecting shaft to move axially along the first output shaft. An elastic element is provided between the top of the first connecting shaft and the first output shaft.

[0013] A second connecting shaft is coaxially mounted on one end of the second output shaft extending out of the gearbox. The second connecting shaft is used to mount the grinding part. The second connecting shaft is mounted inside the second output shaft by a limiting mechanism. The limiting mechanism can restrict the relative rotation of the second connecting shaft and the second output shaft and can allow the second connecting shaft to move axially along the second output shaft. An elastic element is provided between the top of the second connecting shaft and the second output shaft.

[0014] Preferably, the gearbox is further provided with a connecting mechanism, which is used to connect with the actuator so that the actuator can drive the valve grinding device to move.

[0015] Preferably, the second rotating gear is rotatably connected to the gearbox via a cam bearing; wherein the shank of the cam bearing is fixed to the upper cover plate of the gearbox, and the outer ring of the cam bearing is installed in the inner hole of the second rotating gear.

[0016] Preferably, the second output shaft is rotatably connected to the top of the second planetary gear via a second rotary bearing, and the second rotary bearing and the second planetary gear are eccentrically arranged;

[0017] A gear seat ring is coaxially mounted on the bottom of the second revolution gear, and the gear seat ring is rotatably mounted on the lower cover plate of the gearbox via the first turntable bearing.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] This invention includes a first output shaft and a second output shaft, which are connected by a transmission mechanism. The drive mechanism can drive the first output shaft to rotate, so that the grinding element mounted on the first output shaft can grind the conical grinding surface of the valve. When the first output shaft rotates, it can drive the second output shaft to rotate and revolve around a revolution axis through the transmission mechanism, so that the grinding element mounted on the second output shaft can grind the planar grinding surface of the valve. Thus, the valve grinding device can achieve dual-axis output, grinding the planar sealing surface and the conical sealing surface of the valve respectively, which can better meet the grinding requirements of the planar sealing surface and the conical sealing surface. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first-angle schematic diagram of the valve grinding device in an embodiment of the present invention;

[0022] Figure 2 This is a second-angle schematic diagram of the valve grinding device in an embodiment of the present invention;

[0023] Figure 3 This is a third-angle schematic diagram of the valve grinding device in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the valve grinding device after the gearbox has been removed in an embodiment of the present invention;

[0025] Figure 5 for Figure 4 Side view of the valve grinding device;

[0026] Figure 6 for Figure 5 AA section view;

[0027] Figure 7 This is a schematic diagram of the connection between the universal joint and the second output shaft in an embodiment of the present invention.

[0028] In the diagram: 1-Servo motor, 2-Planetary reducer, 3-Transition ring, 401-Gearbox housing, 402-Upper cover plate, 403-Lower cover plate, 404-Cam bearing, 405-First turntable bearing, 406-First rotating gear, 407-Second rotating gear, 408-First planetary gear, 409-Second planetary gear, 410-Busset, 411-Deep groove ball bearing, 412-Universal joint, 4121-Input flange, 4122-First linear cross-roller bearing, 4123-Intermediate section, 4124-Second linear cross-roller bearing, 413-Second turntable bearing, 414-Gear seat ring, 5-First output shaft, 6-Second output shaft, 7-Connecting mechanism, 8-First connecting shaft, 9-Second connecting shaft, 10-Spring, 11-Limit key. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a valve grinding device to solve the problems existing in the prior art. It can achieve dual-axis output and grind the flat sealing surface and the conical sealing surface of the valve respectively, so as to better meet the grinding requirements of the flat sealing surface and the conical sealing surface.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figures 1-7 As shown, this embodiment provides a valve grinding device, mainly including a drive mechanism, a transmission mechanism, a first output shaft 5, and a second output shaft 6. A grinding element can be installed on both the first output shaft 5 and the second output shaft 6. The grinding element is usually a grinding disc, which is a mature existing technology in this field and will not be described in detail in this embodiment. In this embodiment, the first output shaft 5 and the second output shaft 6 are connected by the transmission mechanism. The drive mechanism can drive the first output shaft 5 to rotate, so that the grinding element installed on the first output shaft 5 grinds the conical grinding surface of the valve. The drive mechanism can also drive the second output shaft 6 to rotate and revolve around a revolution axis, so that the grinding element installed on the second output shaft 6 grinds the planar grinding surface of the valve.

[0034] This embodiment provides a first output shaft 5 and a second output shaft 6, which are connected by a transmission mechanism. The drive mechanism can drive the first output shaft 5 to rotate, so that the grinding element installed on the first output shaft 5 can grind the conical grinding surface of the valve. When the first output shaft 5 rotates, it can drive the second output shaft 6 to rotate and revolve around the revolution axis through the transmission mechanism, so that the grinding element installed on the second output shaft 6 can grind the flat grinding surface of the valve. Thus, the valve grinding device can achieve dual-axis output, grinding the flat sealing surface and the conical sealing surface of the valve respectively, which can better meet the grinding requirements of the flat sealing surface and the conical sealing surface.

[0035] In this embodiment, the driving mechanism is preferably a servo motor 1, and a reducer is also provided on the output shaft of the servo motor 1. The reducer is connected to the first output shaft 5, enabling the servo motor 1 to drive the first output shaft 5 to rotate. The first output shaft 5 is coaxially arranged with the output shaft of the driving mechanism, and the second output shaft 6 is located on one side of the first output shaft 5 and parallel to it. In this embodiment, the reducer is preferably a planetary reducer 2, and a top flange is provided on the top of the first output shaft 5, which is coaxially connected to the output flange of the planetary reducer 2.

[0036] In this embodiment, the transmission mechanism is preferably a gear transmission mechanism, which is installed in a gearbox. The gearbox mainly includes a gearbox housing 401, with an upper cover plate 402 on the top and a lower cover plate 403 on the bottom. The first output shaft 5 and the second output shaft 6 are rotatably installed in the gearbox, and the bottoms of the first output shaft 5 and the second output shaft 6 extend out of the gearbox. The output end of the planetary reducer 2 is bolted to the upper cover plate 402 via a transition ring 3.

[0037] It should be further noted that other transmission mechanisms, such as synchronous belt drives, can also be selected according to work requirements.

[0038] In a preferred embodiment, the gear transmission mechanism mainly includes a first rotating gear 406, a first revolving gear 408, a second rotating gear 407, and a second revolving gear 409. The first rotating gear 406 and the first revolving gear 408 are sequentially mounted on the first output shaft 5 along its axial direction via keys. A bushing 410 is fitted onto the first output shaft 5, located between the first rotating gear 406 and the first revolving gear 408 for axial positioning. The first output shaft 5 is also rotatably connected to the lower cover plate 403 of the gearbox via a deep groove ball bearing 411. The second rotating gear 407 is rotatably mounted on the gearbox and meshes with the first rotating gear 406. The second rotating gear 407 is connected to the top of the second output shaft 6 via a universal joint 412. The second orbital gear 409 is rotatably mounted on the gearbox and meshes with the first orbital gear 408. The second output shaft 6 is rotatably mounted on the second orbital gear 409 and is eccentrically positioned with the second orbital gear 409.

[0039] It should be noted that the axis of the second planetary gear 409 is the same as the axis of revolution of the second output shaft 6. The second rotational gear 407 is connected to the second output shaft 6 via a universal joint 412 to facilitate the revolution of the second output shaft 6. The universal joint 412 mainly includes an input flange 4121, a first linear cross roller bearing 4122, an intermediate joint 4123, and a second linear cross roller bearing 4124. The upper part of the input flange 4121 is bolted to the second rotational gear 407, and the lower part is bolted to... The first linear cross roller bearing 4122, the upper and lower slots of the intermediate section 4123 are respectively bolted to the first linear cross roller bearing 4122 and the second linear cross roller bearing 4124. The second linear cross roller bearing 4124 is perpendicular to the first linear cross roller bearing 4122, and its bottom is bolted to the top flange of the second output shaft 6. The above-mentioned universal joint 412 is a mature prior art in this field. Other universal joints 412 can also be selected according to the working needs. In this embodiment, they will not be described in detail.

[0040] In this embodiment, the second rotating gear 407 is rotatably connected to the gearbox via a cam bearing 404; wherein, the shank of the cam bearing 404 is fixed to the upper cover plate 402 of the gearbox, and the outer ring of the cam bearing 404 is installed in the inner hole of the second rotating gear 407.

[0041] In this embodiment, the second output shaft 6 is rotatably connected to the top of the second planetary gear 409 via a second rotary bearing 413. The second rotary bearing 413 and the second planetary gear 409 are eccentrically arranged, with the eccentricity being the radius of the second output shaft 6's revolution. Specifically, a positioning hole is provided on the upper end face of the second planetary gear 409, which is eccentrically arranged with the second planetary gear 409, with the eccentricity being the radius of the second output shaft 6's revolution. The inner ring of the second rotary bearing 413 mates with the second output shaft 6 and is connected to the lower part of the universal joint 412 via bolts. The outer ring of the second rotary bearing 413 is installed in the positioning hole on the upper end face of the second planetary gear 409B.

[0042] Furthermore, a gear seat ring 414 is coaxially mounted on the bottom of the second revolution gear 409. The gear seat ring 414 is rotatably mounted on the lower cover plate 403 of the gearbox via the first turntable bearing 405. Specifically, a positioning hole is provided on the lower end face of the second revolution gear 409. The positioning hole is coaxially arranged with the second revolution gear 409. The gear seat ring 414 is installed in the positioning hole, and the lower part of the gear seat ring 414 is coaxially engaged with the inner ring of the first turntable bearing 405. The outer ring of the first turntable bearing 405 is installed in the positioning hole provided on the lower cover plate 403 of the gearbox.

[0043] In this embodiment, a first connecting shaft 8 is coaxially mounted on one end of the first output shaft 5 extending out of the gearbox. The first connecting shaft 8 is used to mount the grinding component. The first connecting shaft 8 is mounted within the first output shaft 5 via a limiting mechanism. This limiting mechanism restricts the relative rotation between the first connecting shaft 8 and the first output shaft 5 and allows the first connecting shaft 8 to move axially along the first output shaft 5. An elastic element is provided between the top of the first connecting shaft 8 and the first output shaft 5. An actuator moves the gearbox towards the sealing surface, compressing the elastic element and applying grinding pressure. After grinding is completed, the elastic element drives the first output shaft 5 to reset. The elastic element is preferably a spring 10, and the limiting mechanism preferably includes a limiting key 11 and a limiting groove. The limiting key 11 is disposed on the first connecting shaft 8 and extends axially along the first connecting shaft 8. A corresponding limiting groove is provided on the first output shaft 5. Limiting is achieved through the cooperation of the limiting key 11 and the limiting groove. Alternatively, other limiting mechanisms can be selected according to operational needs.

[0044] The structure of the second output shaft 6 is similar. A second connecting shaft 9 is coaxially mounted on one end of the second output shaft 6 that extends out of the gearbox. The second connecting shaft 9 is used to mount the grinding part. The second connecting shaft 9 is mounted inside the second output shaft 6 by a limiting mechanism. The limiting mechanism can restrict the relative rotation of the second connecting shaft 9 and the second output shaft 6, and can allow the second connecting shaft 9 to move axially along the second output shaft 6. An elastic element is provided between the top of the second connecting shaft 9 and the second output shaft 6.

[0045] In this embodiment, the gearbox is further provided with a connecting mechanism 7, which is used to connect with the actuator so that the actuator can drive the valve grinding device to move; wherein, the connecting mechanism 7 is preferably a connecting key, and the actuator is provided with a connecting hole that cooperates with the connecting key to realize the connection between the gearbox and the actuator.

[0046] Furthermore, it should be noted that the aforementioned actuators are mature existing technologies in this field and can be selected according to specific work needs, such as choosing a robotic arm, etc., which will not be elaborated upon in this embodiment.

[0047] The valve grinding device is used in this embodiment as follows:

[0048] 1. Grinding of conical sealing surfaces

[0049] After the servo motor 1 is given a command, it starts to run. The power is reduced in speed after passing through the planetary reducer 2. The planetary reducer 2 transmits the power to the first output shaft 5 through the output flange. The first output shaft 5 transmits the power to the first connecting shaft 8 through the limit mechanism. The first connecting shaft 8 drives the corresponding grinding disc to rotate.

[0050] The actuator drives the gearbox to move toward the conical sealing surface, the spring 10 is compressed, and grinding pressure is applied, thereby achieving coaxial grinding of the conical sealing surface.

[0051] II. Grinding of flat sealing surfaces

[0052] After the servo motor 1 is given a command, it starts to run. The power is reduced in speed by the planetary reducer 2. The power of the planetary reducer 2 is transmitted to the first output shaft 5. The first output shaft 5 drives the first rotating gear 406 and the first revolving gear 408 to rotate via a key. The first rotating gear 406 transmits power to the second rotating gear 407. The second rotating gear 407 transmits power to the universal joint 412. The universal joint 412 drives the second output shaft 6 to rotate to achieve rotation. The first revolving gear 408 drives the second revolving gear 409 to rotate. The second revolving gear 409 drives the second output shaft 6 to rotate to achieve revolution. The second output shaft 6 transmits power to the second connecting shaft 9 through a limiting mechanism. The second connecting shaft 9 drives the corresponding grinding disc to rotate.

[0053] The actuator drives the gearbox to move toward the flat sealing surface, the spring 10 is compressed, and grinding pressure is applied, so that the grinding disc moves by revolution and rotation to grind the flat sealing surface.

[0054] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A valve grinding device, characterized in that: The device includes a drive mechanism, a transmission mechanism, a first output shaft, and a second output shaft. A grinding element can be mounted on both the first and second output shafts. The first and second output shafts are connected by the transmission mechanism. The drive mechanism can drive the first output shaft to rotate, so that the grinding element mounted on the first output shaft can grind the conical grinding surface of the valve. The drive mechanism can also drive the second output shaft to rotate and revolve around a revolution axis, so that the grinding element mounted on the second output shaft can grind the planar grinding surface of the valve. The first output shaft is coaxially arranged with the output shaft of the drive mechanism, and the second output shaft is parallel to the first output shaft. The transmission mechanism is a gear transmission mechanism, which is installed in a gearbox. The first output shaft and the second output shaft are both rotatably installed in the gearbox, and the bottom of the first output shaft and the second output shaft both extend out of the gearbox. The gear transmission mechanism includes a first rotating gear, a first revolving gear, a second rotating gear, and a second revolving gear. The first rotating gear and the first revolving gear are sequentially mounted on the first output shaft along its axial direction. The second rotating gear is rotatably mounted on the gearbox and meshes with the first rotating gear. The second rotating gear is connected to the top of the second output shaft via a universal joint. The second revolving gear is rotatably mounted on the gearbox and meshes with the first revolving gear. The second output shaft is rotatably mounted on the second revolving gear and is eccentrically positioned relative to the second revolving gear.

2. The valve grinding device according to claim 1, characterized in that: The driving mechanism is a servo motor, and the output shaft of the servo motor can be connected to the first output shaft.

3. The valve grinding device according to claim 2, characterized in that: A speed reducer is also installed on the output shaft of the servo motor.

4. The valve grinding device according to claim 1, characterized in that: A first connecting shaft is coaxially mounted on one end of the first output shaft extending out of the gearbox. The first connecting shaft is used to mount the grinding part. The first connecting shaft is mounted inside the first output shaft by a limiting mechanism. The limiting mechanism can restrict the relative rotation between the first connecting shaft and the first output shaft and can allow the first connecting shaft to move along the axial direction of the first output shaft. An elastic element is provided between the top of the first connecting shaft and the first output shaft. A second connecting shaft is coaxially mounted on one end of the second output shaft extending out of the gearbox. The second connecting shaft is used to mount the grinding part. The second connecting shaft is mounted inside the second output shaft by a limiting mechanism. The limiting mechanism can restrict the relative rotation of the second connecting shaft and the second output shaft and can allow the second connecting shaft to move axially along the second output shaft. An elastic element is provided between the top of the second connecting shaft and the second output shaft.

5. The valve grinding device according to claim 4, characterized in that: The gearbox is also provided with a connecting mechanism, which is used to connect with the actuator so that the actuator can drive the valve grinding device to move.

6. The valve grinding device according to claim 1, characterized in that: The second rotating gear is rotatably connected to the gearbox via a cam bearing; wherein, the shank of the cam bearing is fixed to the upper cover plate of the gearbox, and the outer ring of the cam bearing is installed in the inner hole of the second rotating gear.

7. The valve grinding device according to claim 1, characterized in that: The second output shaft is rotatably connected to the top of the second planetary gear via a second turntable bearing, and the second turntable bearing and the second planetary gear are eccentrically arranged; A gear seat ring is coaxially mounted on the bottom of the second revolution gear, and the gear seat ring is rotatably mounted on the lower cover plate of the gearbox via the first turntable bearing.

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