A vacuum valve core grinding machine

Abstract

The present invention discloses a vacuum valve core grinding machine, which belongs to the field of valve body processing technology, and includes a valve body fixing plate, which is used for placing the valve body, and a first through hole for the valve stem to pass through is opened on the valve body fixing plate, and a rotating motor is arranged on the side of the valve body fixing plate away from the valve body placement surface, and the rotating motor is used to connect with the valve stem to drive the valve stem to rotate in a horizontal plane. The vacuum valve core grinding machine in the present application places the valve body on the valve body fixing plate, and suspends the rotating motor on the valve stem, and uses the gravity of the valve stem and the rotating motor to make the conical surface of the valve stem and the valve body always close to each other, and then uses the rotation of the rotating motor to make the conical mating surfaces of the valve stem and the valve body grind against each other, so as to complete the grinding work of the mating surface of the valve body and the valve stem.

Description

Technical Field

[0001] The invention belongs to the technical field of valve body processing, and in particular relates to a vacuum valve core grinding machine. Background Art

[0002] With the development of the automobile industry, automobiles are gradually moving towards large and complex parts. In order to meet the performance requirements of products, changes in die-casting technology have been triggered, thereby increasing the introduction of vacuum die-casting technology. The technology of vacuum die-casting relies on the performance of vacuum valves. A vacuum valve refers to a vacuum system component used to change the direction of airflow, adjust the amount of airflow, and cut off or connect pipelines in a vacuum system. The valve body structure of the vacuum valve is a conical sealing structure. The sealing is completed by the cooperation of the valve stem and the conical surface of the valve body to isolate the material and prevent the material from entering the valve body. When the valve body is used for sealing, it is required that the valve body and the valve stem have good sealing performance, so that when pouring materials, the material is blocked under pressure and no flash is generated to maintain the sealing effect next time.

[0003] During the long-term cooperation between the valve body and the valve stem, particles will enter the matching surface of the valve body and the valve stem, causing wear of the matching surface of the valve body and the valve stem during use, resulting in poor sealing effect. Therefore, it is necessary to re-grind the matching surface of the valve body and the valve stem after using them for a set number of times to ensure that the two are closely matched.

[0004] The existing grinding of valve bodies and valve stems has low grinding efficiency and is affected by the manual grinding method, which easily causes the problem of poor matching effect between the valve body and the valve stem. Summary of the invention

[0005] In response to one or more of the above defects or improvement needs of the prior art, the present invention provides a vacuum valve core grinding machine to solve the problems of low grinding efficiency of existing vacuum valve cores and poor matching effect between the valve body and the valve stem after grinding.

[0006] To achieve the above-mentioned purpose, the present invention provides a vacuum valve core grinding machine, which is used for grinding the matching surface between the valve stem and the valve body in the vacuum valve, wherein one end of the valve stem has an inverted cone structure and abuts against the matching surface of the valve body, and the other end thereof extends out of the valve body; the machine comprises:

[0007] A valve body fixing plate, the valve body fixing plate is used for placing the valve body, and the valve body fixing plate is provided with a first through hole for the valve stem to vertically penetrate;

[0008] A rotating motor is arranged on a side of the valve body fixing plate away from the valve body placement surface, and the rotating motor is used to be connected to the valve stem and drive the valve stem to rotate in a horizontal plane.

[0009] As a further improvement of the present invention, at least one fixing clamp is further provided on the valve body fixing plate, one end of the fixing clamp is rotatably connected to the valve body fixing plate, and the other end thereof can swing vertically to press the valve body onto the valve body fixing plate.

[0010] As a further improvement of the present invention, it further comprises at least one valve stem limiting plate, the valve stem limiting plate is vertically spaced apart from the valve body fixing plate, and the valve stem limiting plate is arranged between the valve body fixing plate and the rotating motor;

[0011] The valve stem limiting plate is provided with a second through hole for the valve stem to pass through, and the second through hole is coaxially arranged with the first through hole;

[0012] At least one limiter is connected between the valve stem limit plate and the valve body fixing plate, and two ends of the limiter are respectively connected to the valve stem limit plate and the valve body fixing plate for relative fixation of the valve stem limit plate and the valve body fixing plate.

[0013] As a further improvement of the present invention, the valve stem limiting plate and the valve body fixing plate are respectively detachably connected to the limiter, and the vertical length of the limiter is adjustable.

[0014] As a further improvement of the present invention, it also includes a grinder base, which is vertically spaced apart from the valve body fixing plate, and at least one guide limit column is vertically provided between the grinder base and the valve body fixing plate, and the valve stem limit plate is passed through the guide limit column.

[0015] As a further improvement of the present invention, a back plate is further provided between the grinder base and the valve body fixing plate, one end of the back plate abuts against the side of the grinder base, and the other end abuts against the side of the valve body fixing plate, and one side edge of the valve stem limiting plate abuts against the back plate.

[0016] As a further improvement of the present invention, it also includes a motor fixing plate, the rotating motor is fixed on the motor fixing plate, the motor fixing plate is horizontally arranged and penetrates the guide limit column, and one side edge of the motor fixing plate abuts against the back plate.

[0017] As a further improvement of the present invention, the output shaft of the rotary motor is further connected with a coupling, and the coupling is used for connecting the rotary motor and the valve stem.

[0018] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0019] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0020] (1) The vacuum valve core grinding machine of the present invention places the valve body on a valve body fixing plate and suspends a rotating motor on the valve stem, and uses the gravity of the valve stem and the rotating motor to keep the conical surfaces of the valve stem and the valve body in close contact at all times, and then uses the rotation of the rotating motor to grind the conical mating surfaces of the valve stem and the valve body against each other, thereby completing the grinding work of the mating surfaces of the valve stem and the valve body.

[0021] (2) The vacuum valve core grinding machine of the present invention fixes the valve body by setting a fixing clamp on the valve body fixing plate, and limits the valve stem by setting a valve stem limiting plate, so that when the valve body and the valve stem are ground against each other, the valve body itself is in a stable state, and the valve stem will not swing in its radial direction, so that the matching surfaces of the valve body and the valve stem are always in a vertical downward matching state, avoiding the displacement of the matching surfaces of the valve stem and the valve body after grinding, and ensuring the tight fit of the valve body and the valve stem after grinding.

[0022] (3) The vacuum valve core grinding machine of the present invention, by providing a guide column, a motor fixing plate and a coupling structure, ensures that the rotating motor will not deviate along the radial direction of the valve stem when rotating. At the same time, the sliding fit of the guide column and the motor fixing plate ensures that the gravity of the rotating motor itself drags the valve stem, so that the two mating surfaces of the valve stem and the valve body are always in close contact during grinding, thereby achieving a grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the cross-sectional structure of a vacuum valve core grinding machine according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.

[0025] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0026] 1. Valve body; 2. Valve stem; 3. Valve body fixing plate; 4. Rotating motor; 5. Fixing clamp; 6. Valve stem limit plate; 7. Limiter; 8. Grinding machine base; 9. Guide limit column; 10. Back plate; 11. Motor fixing plate; 12. Coupling; 13. Support platform; 14. Guide sleeve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Example:

[0033] See also Figure 1 , Figure 2 , Figure 1 This is a cross-sectional structural diagram of the vacuum valve core grinding machine. Figure 2 for Figure 1 The enlarged schematic diagram at point A in the middle represents the cross-sectional structure at the tapered mating surface between the valve body and the valve stem.

[0034] The vacuum valve core grinding machine in the preferred embodiment of the present invention is used for grinding the mating surface between the valve stem 2 and the valve body 1 in the vacuum valve, one end of the valve stem 2 has an inverted cone structure and abuts on the mating surface of the valve body 1, and the other end thereof extends out of the valve body 1. The vacuum valve core grinding machine in the present application includes a valve body fixing plate 3, which is used for placing the valve body 1, and the valve body fixing plate 3 is provided with a first through hole for the valve stem 2 to pass through, and a rotating motor 4 is provided on the side of the valve body fixing plate 3 away from the placement surface of the valve body 1, and the rotating motor 4 is used to be connected to the valve stem 2 to drive the valve stem 2 to rotate in a horizontal plane.

[0035] Specifically, when the vacuum valve is ground using a vacuum valve core grinder, the valve body 1 is placed on the valve body fixing plate 3, and the valve stem 2 is extended from the first through hole so that the valve stem 2 is suspended vertically. Then, a rotating motor 4 is connected to the lower end of the valve stem 2. The rotating motor 4 and the gravity of the valve stem 2 are used to ensure that the inverted conical end face of the valve stem 2 is always attached to the conical mating surface of the valve body 1. The rotating motor 4 is then used to drive the valve stem 2 to rotate in a horizontal plane. The mating surfaces of the valve stem 2 and the valve body 1 are rotated and ground by a vertical falling force and a horizontal rotational force.

[0036] Furthermore, when the valve body 1 and the valve stem 2 of the above vacuum valve are ground against each other, grinding paste needs to be added to the grinding surfaces of the valve body 1 and the valve stem 2 to ensure the grinding efficiency of the valve body 1 and the valve stem 2 .

[0037] Preferably, a placement groove is provided on the valve body fixing plate 3 at a position corresponding to the placement of the valve body 1, and the placement groove matches the size of the valve body 1. After the valve body 1 is placed in the placement groove, the placement groove can limit the circumferential side wall of the valve body 1 to avoid the shaking problem of the valve body 1 caused by the rotation of the valve stem 2 when the valve body 1 and the valve stem 2 are ground.

[0038] Furthermore, as a preferred embodiment of the present invention, at least one fixing clamp 5 is also provided on the valve body fixing plate 3 in the present application, one end of the fixing clamp 5 is rotatably connected to the valve body fixing plate 3, and the other end thereof can swing vertically to press the valve body 1 against the valve body fixing plate 3. When the vacuum valve is in use, the valve stem 2 itself needs to move along its axial direction, and the change of the amount of air flow in the vacuum valve is achieved through the matching and separation of the inverted conical end of the valve stem 2 and the conical matching surface of the valve body 1, so the matching tightness of the valve stem 2 and the valve body 1 is crucial. During the grinding process, if the valve body 1 and the valve stem 2 are relatively displaced, this will cause the matching surface of the valve body 1 and the valve stem 2 to deviate or form an irregular matching surface, resulting in the valve stem 2 being unable to repeatedly match the conical matching surface of the valve body 1 during the expansion and contraction process. Based on this, when the present application realizes the mutual grinding of the valve body 1 and the valve stem 2, it is necessary to ensure the problem of the valve body 1 itself. Therefore, at least one fixing clamp 5 is provided on the valve body fixing plate 3 , and the valve body 1 is fastened to the valve body fixing plate 3 by the fixing clamp 5 , so as to maintain stable grinding of the valve body 1 and the valve stem 2 .

[0039] Furthermore, the fixing clamps 5 can be arranged in pairs, and a support platform 13 is provided at the connection between the fixing clamps 5 and the valve body fixing plate 3. The thickness of the support platform 13 is set to be the same as the height of the valve body 1 itself, so that the fixing clamps 5 and the side of the valve body 1 away from the valve body fixing plate 3 are at the same height, which facilitates the fixing of the valve body 1 by the fixing clamps 5. A clamp spring is provided at the connection between the fixing clamps 5 and the support platform 13. After the valve body 1 is placed on the valve body fixing plate 3, the fixing clamps 5 are pressed, and one end of the fixing clamps 5 rotates along the clamp spring, and the other end thereof abuts against the valve body 1, and the valve body 1 is fixed to the valve body fixing plate 3 by the restoring force of the clamp spring itself.

[0040] Furthermore, as a preferred embodiment of the present invention, the vacuum valve core grinding machine in the present application also includes at least one valve stem limiting plate 6, which is vertically spaced apart from the valve body fixing plate 3 and is located between the valve body fixing plate 3 and the rotating motor 4. The valve stem limiting plate 6 is provided with a second through hole for the valve stem 2 to pass through. At the same time, at least one limiter 7 is connected between the valve stem limiting plate 6 and the valve body fixing plate 3, and the two ends of the limiter 7 are respectively connected to the valve stem limiting plate 6 and the valve body fixing plate 3, so as to relatively fix the valve stem limiting plate 6 and the valve body fixing plate 3. When the valve body 1 and the valve stem 2 are ground by rotating cooperation, the valve body 1 can be directly clamped and fixed by the fixing clamp 5, and the valve stem 2 can only be prevented from shaking by limiting, so as to ensure the close cooperation between the valve body 1 and the valve stem 2. In order to prevent the valve stem 2 from shaking in the radial direction, at least one valve stem limiting plate 6 is required. The valve body fixing plate 3 and the valve stem limiting plate 6 are used to limit the valve stem 2 at two axial points to prevent the valve stem 2 from shaking.

[0041] Furthermore, the apertures of the first through hole on the valve body fixing plate 3 and the second through hole on the valve stem limiting plate 6 are adapted to the outer diameter of the valve stem 2 to reduce the possibility of radial shaking of the valve stem 2. Preferably, a guide sleeve 14 is further provided at the first through hole and the second through hole, and the guide sleeve 14 is used to fill the gap between the valve stem 2 and the first through hole and the second through hole, thereby ensuring the stable rotation of the valve stem 2 and reducing the degree of radial shaking of the valve stem 2.

[0042] Furthermore, the valve body fixing plate 3 and the valve stem limiting plate 6 are arranged at intervals in the vertical direction, and the valve stem limiting plate 6 itself is in a floating state, so it is necessary to set a limiter 7, and use the limiter 7 to connect the valve stem limiting plate 6 and the valve body fixing plate 3 to ensure the relative stability of the two. At the same time, the limiter 7 is detachably connected to the valve body fixing plate 3 and the valve stem limiting plate 6, and the vertical length of the limiter 7 is adjustable. The detachable connection of the limiter 7 allows the valve stem limiting plate 6 to be disassembled and replaced according to the diameter of the valve stem 2 itself, and the adjustable vertical length of the limiter 7 can extend the length of the limiter 7 when the valve stem 2 shakes violently, so that the valve stem limiting plate 6 and the valve body fixing plate 3 limit the increase in the length of the valve stem 2, so as to reduce the shaking degree of the valve stem 2 and ensure the stable grinding of the valve body 1 and the valve stem 2.

[0043] Furthermore, as a preferred embodiment of the present invention, the vacuum valve core grinder in the present application also includes a grinder base 8, which is also vertically spaced from the valve body fixing plate 3, and at least one guide limit column 9 is vertically arranged between the grinder base 8 and the valve body fixing plate 3, and the valve stem limit plate 6 is penetrated on the guide limit column 9. The valve body 1 itself is arranged on the valve body fixing plate 3, and the downward force of the valve stem 2 itself needs to be utilized when grinding the valve stem 2. The valve body fixing plate 3 itself needs to be set at a certain height to ensure that there is space to connect the rotating motor 4 after the valve stem 2 is vertically straightened. Therefore, the present application correspondingly sets a grinder base 8 and supports the valve body fixing plate 3 through a guide column structure.

[0044] At the same time, in addition to supporting the valve body fixing plate 3, the above-mentioned guide limit column 9 can also limit the valve stem limit plate 6. Although the second through hole is set on the valve stem limit plate 6 to limit the valve stem 2, when the rotary motor 4 rotates, it will cause the valve stem limit plate 6 to shake synchronously. For this reason, the valve stem limit plate 6 is inserted into the guide limit column 9 to limit the horizontal position of the valve stem limit plate 6, so as to maintain the valve stem 2 stable in the original position when rotating.

[0045] Further, as a preferred embodiment of the present invention, a back plate 10 is further provided between the grinder base 8 and the valve body fixing plate 3 in the present application, one end of the back plate 10 abuts against the side of the grinder base 8, and the other end abuts against the side of the valve body fixing plate 3, and at the same time, one side of the valve stem limiting plate 6 also abuts against the back plate 10. The valve body fixing plate 3 and the grinder base 8 are fixed by the guide limiting column 9, and at the same time, the guide limiting column 9 plays a limiting role on the valve stem limiting plate 6. A back plate 10 can also be provided between the valve body fixing plate 3 and the grinder base 8 to perform secondary limiting on the valve stem limiting plate 6 to ensure the stability of the valve stem limiting plate 6.

[0046] Further preferably, the vacuum valve core grinding machine in the present application also includes a motor fixing plate 11, the rotating motor 4 is fixed on the motor fixing plate 11, the motor fixing plate 11 is horizontally arranged and also penetrated on the guide limit column 9, and one side edge of the motor fixing plate 11 abuts on the back plate 10. The rotating motor 4 is the power source for the rotation of the valve stem 2, and the shaking caused by the rotation itself is more severe, so the motor fixing plate 11 is set to fix the rotating motor 4. The valve stem 2 itself needs to use the gravity brought by the rotating motor 4 to make the inverted cone structure of the valve stem 2 always close to the matching surface of the valve body 1, so the motor fixing plate 11 can only be limited on the horizontal plane, and cannot be directly fixed to other structural parts. Here, the motor fixing plate 11 is also penetrated on the guide limit column 9, and the side edge of the motor fixing plate 11 also abuts on the back plate 10, so that the motor fixing plate 11 and the rotating motor 4 retain the downward pulling force on the valve stem 2, while being able to limit the shaking of the rotating motor 4 in the plane.

[0047] Preferably, the output shaft of the rotating motor 4 is also connected with a coupling 12, and the coupling 12 is mainly used to connect the output shaft of the rotating motor 4 with the valve stem 2, so that the rotating motor 4 drives the valve stem 2 to rotate. Preferably, the rotating motor 4 is a speed-regulating motor, which can adjust the speed according to the grinding requirements to ensure the grinding effect.

[0048] The core idea of ​​the vacuum valve core grinding machine in the present invention is to use the gravity of the valve stem 2 and the rotating motor 4 to make the inverted cone structure of the valve stem 2 always close to the matching surface of the valve body 1, and use the rotating motor 4 to drive the valve stem 2 to rotate, so that the matching surface of the valve stem 2 and the valve body 1 is always closely fitted and continuously ground through gravity and horizontal rotation force, so as to achieve a grinding effect. At the same time, the setting of the guide limit column 9, the back plate 10, the valve stem limit plate 6, etc. are all to ensure that the valve stem 2 is offset and shaken in the radial direction during the rotation process, and the motor fixing plate 11 is to reduce the shaking in the horizontal direction during the rotation of the rotating motor 4, to ensure that the axial centers of the valve body 1, the valve stem 2, and the rotating motor 4 are vertically aligned, to avoid the problem that the matching surface of the valve stem 2 and the valve body 1 deviates from the axial center of the valve stem 2 after grinding caused by the shaking of the valve stem 2 during the grinding process, and to avoid the problem that the valve stem 2 cannot be tightly attached to the matching surface of the valve body 1 during the extension and contraction process after grinding, so as to ensure the grinding quality.

[0049] It will be easily understood by those skilled in the art that 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum valve core grinding machine, used for grinding the matching surface between the valve stem and the valve body in the vacuum valve, wherein one end of the valve stem has an inverted cone structure and abuts against the matching surface of the valve body, and the other end thereof extends out of the valve body; It is characterized in that include: A valve body fixing plate, the valve body fixing plate is used for placing the valve body, and the valve body fixing plate is provided with a first through hole for the valve stem to vertically penetrate; A rotating motor, the rotating motor is arranged on a side of the valve body fixing plate away from the valve body placement surface, the rotating motor is used to be connected to the valve stem and drive the valve stem to rotate in a horizontal plane; At least one valve stem limiting plate, the valve stem limiting plate and the valve body fixing plate are vertically spaced apart, and the valve stem limiting plate is arranged between the valve body fixing plate and the rotating motor; The valve stem limiting plate is provided with a second through hole for the valve stem to pass through; At least one stopper is connected between the valve stem stopper plate and the valve body fixing plate, and two ends of the stopper are respectively connected to the valve stem stopper plate and the valve body fixing plate, and are used for relative fixing of the valve stem stopper plate and the valve body fixing plate; A grinder base, wherein the grinder base and the valve body fixing plate are vertically spaced apart, at least one guide limit column is vertically arranged between the grinder base and the valve body fixing plate, and the valve stem limit plate is passed through the guide limit column; A back plate is further provided between the grinder base and the valve body fixing plate, one end of the back plate abuts against the side of the grinder base, and the other end abuts against the side of the valve body fixing plate, and one side of the valve stem limiting plate abuts against the back plate; A motor fixing plate, the rotating motor is fixed on the motor fixing plate, the motor fixing plate is horizontally arranged and penetrates the guide limit column, and one side edge of the motor fixing plate abuts against the back plate.

2. The vacuum valve core grinding machine according to claim 1, characterized in that: At least one fixing clamp is also provided on the valve body fixing plate, one end of the fixing clamp is rotatably connected to the valve body fixing plate, and the other end of the fixing clamp can swing vertically to press the valve body onto the valve body fixing plate.

3. The vacuum valve core grinding machine according to claim 1, characterized in that: The valve stem limiting plate and the valve body fixing plate are respectively detachably connected to the limiter, and the vertical length of the limiter is adjustable.

4. The vacuum valve core grinding machine according to claim 1, characterized in that: The output shaft of the rotary motor is also connected with a coupling, and the coupling is used for connecting the rotary motor with the valve stem.

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