Automatic valve element grinding equipment

Abstract

The invention relates to the technical field of grinding devices, and particularly discloses automatic valve element grinding equipment which comprises a rack and a grinding mechanism, the grinding mechanism is matched with the rack in a lifting mode, the rack is further provided with a clamping mechanism and a moving mechanism, the clamping mechanism comprises a base, a positioning assembly, an adjusting assembly and a supporting piece, and the moving mechanism drives the base to move in the horizontal direction. Two groups of positioning assemblies, two groups of adjusting assemblies and two groups of supporting pieces are arranged; the positioning assembly comprises a driving piece and a positioning piece, and the driving piece drives the positioning piece to be movably inserted into the connecting hole of the valve element; the adjusting assembly comprises a driving structure and two adjusting pieces, the two adjusting pieces are connected with the positioning piece through one-way bearings respectively, the limiting directions of the two adjusting pieces are opposite, the driving structure drives the positioning piece to rotate, the adjusting pieces are attached to the connecting part in a sliding mode, the diameter of the adjusting pieces is reduced from outside to inside, and the extending ends of the two supporting pieces movably abut against the valve element. According to the grinding equipment, the grinding quality and the grinding efficiency of the valve element are improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, and in particular to automatic grinding equipment for valve cores. Background Art

[0002] The gate valve is a commonly used valve type. The valve core of the gate valve is one of the core components of the gate valve, which is responsible for directly controlling the circulation of the medium. When the valve core is fully lifted, the medium can pass freely. When the valve core drops and tightly combines with the valve seat, the flow of the medium is blocked. The function of the gate valve is based on the effective operation of the valve core and the valve seat. For the gate valve, the state of the valve core directly determines the overall performance of the valve. In long-term use, with the passage of time and frequent switching actions, wear may occur between the valve core and the valve seat, resulting in the sealing surface no longer being smooth, thereby reducing the sealing performance of the valve. Therefore, it is necessary to grind the worn valve core in time to ensure that a good seal can be formed when the gate valve is closed. In the related technology, the valve core is ground by grinding equipment.

[0003] The patent document with the authorization announcement number CN209579225U discloses a V-type ball valve rough turning and grinding composite tooling, including a connecting bottom plate, the upper side of the connecting bottom plate is connected to two clamping seats, the upper end of the clamping seat is provided with a clamping boss, the lower end of the clamping boss is provided with a clamping positioning annular groove, four adjusting nuts are connected to the connecting bottom plate, the adjusting nut of the connecting bottom plate located on the inner side of the clamping seat is connected to a lifting adjusting screw, the lifting adjusting screw is used to support the two connecting seats of the V-type ball valve body, the other two adjusting nuts are connected to a support rod with a screw at the lower end, the support rod is supported on the lower side of the V-type ball valve body, the V-type ball valve rough turning and grinding composite tooling is used to quickly locate and clamp the V-type ball valve body, and is connected to a rocker drill to automatically grind the V-type ball valve body; The grinding composite tooling provided in the patent document drives the V-type ball valve body to rise by rotating two lifting adjustment screws until the arc surface at the upper end of the V-type ball valve body abuts against the clamping positioning annular groove at the lower end of the clamping boss, and finally adjusts the support rod to abut the lower side of the V-type ball valve body to complete the positioning and clamping operation of the V-type ball valve body.

[0004] When grinding the valve body, in order to ensure the grinding accuracy, the valve body needs to be accurately positioned in multiple dimensions before the grinding operation. The grinding composite tooling of the above patent document can realize the rapid clamping and fixing of the V-type ball valve body, but in the fixing operation, it is difficult to ensure the positioning accuracy of the V-type ball valve body by only clamping the V-type ball valve body through the lifting and adjusting screw and the clamping boss. In addition, some hemispherical valve bodies are large in size and mass. It is difficult to repeatedly adjust the fixed position of the valve body during the grinding operation, which affects the efficiency of the valve body grinding process. Summary of the invention

[0005] The present invention provides an automatic valve core grinding device, aiming to solve the problem of low working efficiency caused by failure to quickly and accurately position the valve core when grinding the valve core by grinding equipment in the related art.

[0006] The present invention discloses an automatic valve core grinding device, comprising a frame and a grinding mechanism, wherein the grinding mechanism cooperates with the frame in lifting and lowering and is used to grind the valve core, wherein the valve core comprises a hemispherical main body and two connecting parts, each of the two connecting parts is provided with a connecting hole for connecting a valve stem, and the frame is further provided with a clamping mechanism and a moving mechanism, wherein the clamping mechanism comprises a base and a positioning assembly, an adjusting assembly, and a supporting member arranged on the base, wherein the moving mechanism drives the base to reciprocate relative to the frame in a horizontal direction, and each of the positioning assembly, the adjusting assembly, and the supporting member is provided with two groups; The positioning assembly comprises a driving member and a positioning member, wherein the driving member drives the positioning member to be movably plugged into the connecting hole of the valve core; The adjusting assembly comprises a driving structure and two adjusting members, the two adjusting members are respectively connected to the positioning member through a one-way bearing, the two adjusting members are arranged in opposite limiting directions to the positioning member, the driving structure drives the positioning member to rotate forward or reversely, the adjusting member is slidably fitted with the connecting portion of the valve core, with the side away from the connecting portion as the inner side, and the diameter of the adjusting member decreases from the outside to the inside; The two support members are symmetrically arranged on the base with respect to the axial plane of the positioning member, and the extended ends of the two support members are movably abutted against the valve core.

[0007] The beneficial effects are: it is convenient to quickly clamp and fix the valve core, and through multiple positioning operations, the valve core can be accurately positioned. When the driving member drives the positioning member to move, the positioning member is inserted into the connecting hole of the valve core to complete the radial positioning of the valve core. When the driving structure drives the positioning member to rotate, the corresponding adjusting member rotates with the positioning member. While the adjusting member rotates, it slides against the connecting part of the valve body and gradually pushes the valve core from an inclined state to an upright state to complete the axial positioning of the valve core. While the adjusting member pushes the valve core to rotate, the valve core slides along the two adjusting members, so that the contact position of the two connecting parts and the two adjusting members remains consistent, and the radial position of the valve core is further adjusted to ensure the positioning accuracy of the valve core while improving the accuracy of the subsequent grinding processing of the valve core.

[0008] Preferably, the driving structure includes a driving source, a driving shaft, gear one and gear two, the gear one is fixed on the outside of the positioning member, the gear two is meshed with the gear one, the driving shaft is key-connected with the gear two, and the driving source drives the driving shaft to rotate.

[0009] Preferably, a driving gear is fixed to the driving end of the driving source, a transmission gear is fixed to the driving shaft, and the driving gear is meshed with the transmission gear.

[0010] Preferably, two protrusions and two stoppers are provided at the upper end of the base, the two stoppers are respectively provided at the inner sides of the two protrusions, and the stoppers are provided with through holes, which are coaxial with the positioning member.

[0011] The beneficial effect is that by providing the protrusion and the stopper, it is convenient for the staff to quickly judge whether the valve core has moved into place when clamping the valve core, thereby improving the clamping efficiency of the valve core and reducing the operational difficulty of the valve core clamping.

[0012] Preferably, the moving mechanism comprises a motor and a lead screw, the lead screw is rotationally matched with the frame, the base is threadably matched with the lead screw, and the motor drives the lead screw to rotate.

[0013] Preferably, a guide groove is further provided on the frame, a guide portion is provided at the bottom of the base, the lead screw is threadedly engaged with the guide portion, and the guide portion is slidably engaged with the guide groove.

[0014] The beneficial effect is that by providing the guide groove, the stability of the base sliding along the frame is further improved.

[0015] Preferably, there are two groups of the clamping mechanisms, and the moving mechanism drives the two groups of the clamping mechanisms to be spaced apart and opposite to the grinding mechanism.

[0016] The beneficial effects are: the grinding efficiency of the valve core is improved. When one set of clamping mechanisms moves to be opposite to the grinding mechanism, the other set of clamping mechanisms moves to the loading position of the frame, and the operator unloads the ground valve core and re-fixes the valve core to be ground on the clamping mechanism. By setting up two sets of clamping mechanisms, the effective grinding time of the grinding equipment on the valve core during the grinding operation can be increased, thereby ensuring the grinding efficiency of the valve core.

[0017] Preferably, a plurality of balls are rotatably arranged around the adjusting member.

[0018] The beneficial effect is that each ball is in rotational contact with the connecting part, thereby reducing scratches on the surface of the connecting part when the adjusting member pushes the connecting part.

[0019] Preferably, the grinding mechanism comprises a grinding disc and a feeding assembly, the axial direction of the feeding assembly is parallel to and does not overlap with the axial direction of the grinding disc, and the feeding assembly drives the grinding disc to rotate around the axial direction of the feeding assembly.

[0020] Preferably, the feed assembly is further provided with a lifting member, and the lifting member is used to adjust the distance between the grinding disc and the valve core.

[0021] The beneficial effects of the present invention are: (1) It is convenient to quickly clamp and fix the valve core, and through multiple positioning operations, the valve core can be accurately positioned. When the driving member drives the positioning member to move, the positioning member is inserted into the connecting hole of the valve core to complete the preliminary radial positioning of the valve core. When the driving structure drives the positioning member to rotate, a corresponding adjusting member rotates with the positioning member. While the adjusting member rotates, it slides against the connecting part of the valve body and gradually pushes the valve core from an inclined state to an upright state to complete the axial positioning of the valve core. While the adjusting member pushes the valve core to rotate, the valve core slides along the two adjusting members, so that the contact positions of the two connecting parts and the two adjusting members remain consistent, and the radial position of the valve core is further adjusted to ensure the positioning accuracy of the valve core and improve the accuracy of the subsequent grinding process of the valve core.

[0022] (2) The grinding efficiency of the valve core is improved. When one set of clamping mechanisms moves to the position opposite to the grinding mechanism, the other set of clamping mechanisms moves to the loading position of the frame, and the operator unloads the valve core that has been ground and re-fixes the valve core to be ground on the clamping mechanism. By setting up two sets of clamping mechanisms, the effective grinding time of the grinding equipment on the valve core during the grinding operation can be increased, thereby ensuring the grinding efficiency of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a state diagram of the clamping mechanism of the present invention when assembling the valve core.

[0025] Figure 3 It is a structural schematic diagram of the clamping mechanism in the present invention.

[0026] Reference numerals: 1. Bottom plate; 11. Frame; 12. Feed assembly; 121. Lifting member; 13. Grinding disc; 14. Guide groove; 15. Screw; 2. Valve core; 21. Hemispherical body; 22. Connecting part; 23. Connecting hole; 3. Base; 31. Protrusion; 32. Block; 33. Support member; 4. Driving member; 41. Positioning member; 5. Adjusting member; 51. Driving source; 52. Gear 1; 53. Gear 2. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] like Figures 1 to 3As shown, the automatic valve core grinding equipment of the present invention includes a frame, a grinding mechanism, a clamping mechanism and a moving mechanism. The frame includes a base plate 1 and a frame body 11. The frame body 11 is fixed relative to the base plate 1. The grinding mechanism is installed on the frame body 11 and cooperates with the frame body 11 to rise and fall. The clamping mechanism is used to clamp and fix the valve core 2 to be ground. After the valve core 2 is fixed on the clamping mechanism, the moving mechanism drives the clamping mechanism and the valve core 2 to move on the base plate 1 until the valve core 2 is longitudinally opposite to the grinding mechanism. The grinding mechanism works to grind the valve core 2. The grinding mechanism includes a grinding disc 13 and a feed assembly 12. The axial direction of the feed assembly 12 is parallel to the axial direction of the grinding disc 13 and does not overlap. The feed assembly 12 drives the grinding disc 13 to rotate around the axial direction of the feed assembly 12. A lifting member 121 is also provided on the feed assembly 12. The lifting member 121 is used to adjust the distance between the grinding disc 13 and the valve core 2. The structure of the grinding mechanism belongs to the prior art, and its specific structure will not be repeated here.

[0029] In order to ensure the grinding efficiency of the valve core 2 by the grinding equipment, two groups of clamping mechanisms can be set. The moving mechanism drives the two groups of grinding mechanisms to be opposite to the grinding mechanism at an interval. The moving mechanism drives the two groups of clamping mechanisms to move back and forth along the length direction of the base plate 1. The clamping mechanisms can be loaded and unloaded at both ends of the length of the base plate 1. When one group of clamping mechanisms moves to be opposite to the grinding mechanism, the other group of clamping mechanisms moves to the length end of the base plate 1, and the operator unloads the ground valve core 2 and re-fixes the valve core 2 to be ground on the clamping mechanism. By setting up two groups of clamping mechanisms, the effective grinding time of the grinding equipment on the valve core 2 during the grinding operation can be improved, thereby ensuring the grinding efficiency of the valve core 2.

[0030] The moving mechanism includes a motor and a screw 15. The screw 15 is rotationally matched with the base plate 1, and the base 3 is threadedly matched with the screw 15. The motor drives the screw 15 to rotate. Specifically, a guide groove 14 is also provided on the base plate 1, and a guide portion that slides with the guide groove 14 is provided at the bottom of the base 3. The screw 15 is threadedly connected to the guide portion. When the motor drives the screw 15 to rotate, it drives the base 3 to slide against the base plate 1. By adjusting the driving direction of the motor, the sliding direction of the clamping mechanism relative to the base 3 can be changed.

[0031] The valve core 2 includes a hemispherical body 21, a connecting portion 22 and a connecting hole 23. The hemispherical body 21 is provided with a sealing surface for sealing with the valve seat. There are two connecting portions 22, each of which is provided with a connecting hole 23. The connecting portion 22 is connected to the valve stem through the connecting hole 23. The clamping mechanism includes a base 3 and a positioning assembly, an adjusting assembly, and a supporting member 33 arranged on the base 3. The positioning assembly, the adjusting assembly, and the supporting member 33 are each provided with two groups. Two protrusions 31 and two stoppers 32 are provided at the upper end of the base 3. The two stoppers 32 are respectively arranged on the inner sides of the two protrusions 31. The stoppers 32 are provided on the inner sides of the two protrusions 31. A through hole is provided. When the valve core 2 is clamped, the two connecting parts 22 of the valve core 2 are opposite to the two protrusions 31, and the valve core 2 is pushed to make the two connecting parts 22 slide along the two protrusions 31 respectively until the connecting hole 23 is opposite to the through hole on the stopper 32. The positioning assembly includes a driving member 4 and a positioning member 41, wherein the driving member 4 can be a cylinder, and the driving member 4 drives the positioning member 41 to move along the axial direction of the positioning member 41. The positioning member 41 is coaxially arranged with the through hole. When the driving member 4 drives the positioning member 41 to move, the positioning member 41 is inserted into the connecting hole 23 of the valve core 2 to complete the preliminary radial positioning of the valve core 2.

[0032] The adjusting component is used to further position the axial direction of the valve core 2. The adjusting component includes a driving structure and two adjusting members 5. The two adjusting members 5 are respectively connected to the positioning member 41 through a one-way bearing, and the two adjusting members 5 are set in opposite limiting directions to the positioning member 41. The driving structure is used to drive the positioning member 41 to rotate in the forward or reverse direction. In order to avoid interference between the positioning member 41 and the driving member 4 when the positioning member 4 rotates, the positioning member 41 and the driving end of the driving member 4 rotate to cooperate, and the adjusting member 5 is slidably fitted with the connecting portion 22 of the valve core 2. The axial direction of the adjusting member 5 is parallel to the axial direction of the positioning member 41, with the side away from the connecting portion 22 as the inner side, and the diameter of the adjusting member 5 decreases from the outside to the inside. The two support members 33 are symmetrically arranged on the base 3 about the axial plane of the positioning member 41, and the protruding ends of the two support members 33 are movably abutted against the valve core 2.

[0033] The driving structure includes a driving source 51, a driving shaft, gear one 52 and gear two 53. Gear one 52 is fixed to the outside of the positioning member 41, gear two 53 is meshed with gear one 52, and the driving shaft is key-connected with gear two 53. The driving source 51 drives the driving shaft to rotate. A driving gear is fixed to the driving end of the driving source 51, and a transmission gear is fixed on the driving shaft. The driving gear is meshed with the transmission gear.

[0034] After the positioning member 41 is connected with the connecting hole 23, the axial direction of the valve core 2 is inclined relative to the vertical direction, and one side of the hemispherical body 21 of the valve core 2 contacts the base 3. When the driving structure drives the positioning member 41 to rotate, a corresponding adjusting member 5 rotates with the positioning member 41. While the adjusting member 5 rotates, the connecting portion 22 that abuts against the valve body slides and gradually pushes the valve core 2 from the inclined state to the upright state. At the same time, the extended end of the supporting member 33 extends out. After the adjusting member 5 pushes the valve core 2 to rotate until the axial direction of the valve core 2 is in the vertical state, it abuts against the valve core 2 to complete the axial positioning of the valve core 2. Because the connecting hole 23 of the valve core 2 slides against the positioning member 41, the valve core 2 is moved to the vertical direction. The two adjusting members 5 are dynamically matched, and the diameters of the two adjusting members 5 decrease from the outside to the inside. While the adjusting members 5 push the valve core 2 to rotate, the valve core 2 slides along the two adjusting members 5, so that the contact positions of the two connecting parts 22 and the two adjusting members 5 remain consistent, and the position of the valve core 2 in its radial direction is further adjusted, thereby completing the precise positioning of the position of the valve core 2, ensuring the accuracy of the valve core 2 in subsequent grinding operations, and ensuring the grinding quality of the valve core 2. In addition, by setting the two adjusting members 5 to a structure with changing diameters, it is also convenient to accurately position valve cores 2 of different models during the production process, thereby improving the versatility of the grinding equipment in this embodiment.

[0035] In order to further reduce the friction between the adjusting member 5 and the connecting part 22 when the adjusting member 5 pushes the valve core 2 to rotate, a plurality of balls can be rotatably arranged on the peripheral side of the adjusting member 5, and each ball is in rotational contact with the connecting part 22 to reduce scratches on the surface of the connecting part 22 when the adjusting member 5 pushes the connecting part 22.

[0036] The automatic valve core grinding equipment provided by the present invention is convenient for quickly clamping and fixing the valve core, and through multiple positioning operations, it can complete the precise positioning of the valve core, thereby improving the accuracy of subsequent grinding processing of the valve core. At the same time, through the coordinated operation of two sets of clamping mechanisms, the effective grinding working time of the grinding equipment is greatly improved, thereby improving the grinding processing efficiency of the valve core.

[0037] 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.

[0038] 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.

[0039] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An automatic valve core grinding device, comprising a frame and a grinding mechanism, wherein the grinding mechanism cooperates with the frame to be lifted and lowered, and is used to grind a valve core (2), wherein the valve core (2) comprises a hemispherical body (21) and two connecting parts (22), each of the two connecting parts (22) being provided with a connecting hole (23) for connecting a valve stem, wherein: The frame is also provided with a clamping mechanism and a moving mechanism, the clamping mechanism comprising a base (3) and a positioning assembly, an adjusting assembly, and a supporting member (33) arranged on the base (3), the moving mechanism driving the base (3) to reciprocate relative to the frame in a horizontal direction, and two groups of the positioning assembly, the adjusting assembly, and the supporting member (33) are each provided; The positioning assembly comprises a driving member (4) and a positioning member (41), wherein the driving member (4) drives the positioning member (41) to be movably plugged into a connecting hole (23) of the valve core (2); The regulating assembly comprises a driving structure and two regulating members (5), the two regulating members (5) being connected to the positioning member (41) via a one-way bearing respectively, the limiting directions of the two regulating members (5) and the positioning member (41) being arranged opposite to each other, the driving structure driving the positioning member (41) to rotate in a forward or reverse direction, the regulating member (5) being slidingly fitted with a connecting portion (22) of the valve core (2), with the side away from the connecting portion (22) being the inner side, and the diameter of the regulating member (5) decreasing from the outside to the inside; The two support members (33) are symmetrically arranged on the base (3) about the axial plane of the positioning member (41), and the extended ends of the two support members (33) are movably abutted against the valve core (2).

2. The valve core automatic grinding equipment according to claim 1, characterized in that: The driving structure comprises a driving source (51), a driving shaft, a gear 1 (52) and a gear 2 (53); the gear 1 (52) is fixed to the outside of the positioning member (41); the gear 2 (53) is meshed with the gear 1 (52); the driving shaft is key-connected to the gear 2 (53); and the driving source (51) drives the driving shaft to rotate.

3. The valve core automatic grinding equipment according to claim 2, characterized in that: A driving gear is fixed to the driving end of the driving source (51), a transmission gear is fixed to the driving shaft, and the driving gear meshes with the transmission gear.

4. The valve core automatic grinding equipment according to claim 1, characterized in that: Two protrusions (31) and two stoppers (32) are provided at the upper end of the base (3). The two stoppers (32) are respectively arranged on the inner sides of the two protrusions (31). A through hole is provided on the stopper (32), and the through hole is coaxial with the positioning member (41).

5. The valve core automatic grinding equipment according to claim 1, characterized in that: The moving mechanism comprises a motor and a lead screw (15); the lead screw (15) is rotationally matched with the frame; the base (3) is threadably matched with the lead screw (15); and the motor drives the lead screw (15) to rotate.

6. The valve core automatic grinding equipment according to claim 5, characterized in that: The frame is also provided with a guide groove (14), the bottom of the base (3) is provided with a guide portion, the lead screw (15) is threadedly matched with the guide portion, and the guide portion is slidably matched with the guide groove (14).

7. The valve core automatic grinding equipment according to claim 1, characterized in that: There are two groups of clamping mechanisms, and the moving mechanism drives the two groups of clamping mechanisms to be spaced apart and opposite to the grinding mechanism.

8. The valve core automatic grinding equipment according to claim 1, characterized in that: A plurality of balls are rotatably arranged around the adjusting member (5).

9. The valve core automatic grinding equipment according to claim 1, characterized in that: The grinding mechanism comprises a grinding disc (13) and a feeding assembly (12); the axial direction of the feeding assembly (12) is parallel to and does not overlap with the axial direction of the grinding disc (13); and the feeding assembly (12) drives the grinding disc (13) to rotate around the axial direction of the feeding assembly (12).

10. The valve core automatic grinding equipment according to claim 9, characterized in that: The feed assembly (12) is also provided with a lifting member (121), and the lifting member (121) is used to adjust the distance between the grinding disc (13) and the valve core (2).

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