Positioning mechanism for valve machining

Abstract

The utility model discloses a positioning mechanism for valve processing, which relates to the technical field of valve processing, is used for positioning a compression ring in a valve, and comprises a working table, a first plate body arranged on the working table and at least two movable plates oppositely arranged at the upper end of the first plate body, and the working table is used for being connected with equipment for processing the compression ring. The cylinder is arranged on the side face of the first movable plate, the protruding plate is arranged in the cylinder, when the driving assembly drives the two movable plates to get close, the linkage assembly synchronously drives the protruding part on the surface of the shifting shaft to abut against the bottom end of the protruding plate, and then the protruding plate is driven to stretch out of the through groove so as to apply pressure to the inner wall of the pressing ring arranged outside the cylinder in a sleeving mode. And when the two movable plates are separated, the concave area on the surface of the shifting shaft is synchronously driven to abut against the bottom end of the protruding plate, and then the protruding plate is driven to retract in the through groove, so that pressure applied to the inner wall of the pressing ring arranged outside the cylinder in a sleeving mode is canceled, and the pressing ring is conveniently taken down.

Description

Technical Field

[0001] The utility model relates to the technical field of valve processing, in particular to a positioning mechanism for valve processing. Background Art

[0002] The valve is a pipeline accessory used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. The compression ring (spacer ring) is an important component of the valve. It is used to evenly distribute the axial pressure of the gland, ensure that the entire circumference is evenly stressed, and ensure that the valve stem axis is in the center during the rotation process. In the process of processing the compression ring, a positioning mechanism is required to fix it.

[0003] After searching, a Chinese utility model patent with authorization announcement number CN211136859U was found, which discloses a positioning mechanism for valve pressure ring processing, including an equipment body, a fixed plate fixedly connected to the top of the equipment body, a processing plate movably connected to the top of the fixed plate, two fixing mechanisms movably connected to the top of the processing plate, the front and rear sides of the bottom of the fixing mechanism are fixedly connected to sliding mechanisms, both sides of the sliding mechanism are fixedly connected to the inner wall of the processing plate, the internal fixed connection of the fixing mechanism is connected to a limiting mechanism, a limiting groove used in cooperation with the limiting mechanism is provided on the top of the processing plate, the limiting mechanism includes a movable plate, a spring fixedly connected to the top of the movable plate, the top of the spring is fixedly connected to the inner wall of the fixed clamping plate, the bottom of the movable plate is fixedly connected to a limiting block, and the bottom of the limiting block passes through the fixed clamping plate and extends to the inner cavity of the limiting groove.

[0004] Its working principle is: place the pressure ring between the two clamping columns, move the movable plate upward, the limit block moves into the inner cavity of the fixed clamping plate, release the limit on the fixed clamping plate, push the fixed clamping plate, the movement of the fixed clamping plate drives the connecting block to slide inside the through groove, the connecting block drives the sliding sleeve to slide on the surface of the sliding rod, the movement of the fixed clamping plate drives the clamping column to move and contact with the pressure ring, and the side of the fixed clamping plate close to the pressure ring also contacts with the pressure ring, the user releases the movable plate, the rebound of the spring drives the limit block to move into the inner cavity of the limit groove, and positioning is achieved. However, the existing technology has the following problems: it lacks a limiting structure for the radial rotation of the pressure ring around the clamping column, so that the pressure ring is easy to rotate during the processing, affecting the processing accuracy. Utility Model Content

[0005] The utility model aims to provide a positioning mechanism for valve processing, so as to solve the technical problem raised by the above-mentioned background technology that the positioning mechanism for valve processing on the current market lacks a limiting structure for the radial rotation of the pressure ring around the clamping column, which makes the pressure ring easy to rotate during the processing.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a positioning mechanism for valve processing, used for positioning a pressure ring in a valve, comprising:

[0007] A workbench, which is used to connect with a device for processing the pressure ring;

[0008] A first plate body disposed on the workbench and at least two movable plates disposed relatively on the upper end of the first plate body;

[0009] A driving assembly for driving the two movable plates to move toward or away from each other;

[0010] The positioning mechanism also includes:

[0011] A cylinder disposed on the side of one of the movable plates;

[0012] A convex plate is slidably disposed in a through groove provided on the side of the cylinder;

[0013] A shift shaft is located in the cylinder, and the outer surface of the shift shaft extending along the central axis is provided with a plurality of raised portions at intervals, and adjacent raised portions form a recessed area, and the surface of the shift shaft contacts the bottom end of the convex plate;

[0014] The linkage assembly is used to synchronously drive the raised portion on the surface of the shift shaft to contact the bottom end of the convex plate when the driving assembly drives the two movable plates to move closer, thereby driving the convex plate to extend out of the through groove to apply pressure to the inner wall of the pressure ring sleeved on the outside of the cylinder.

[0015] As a preferred technical solution of the utility model, the driving assembly includes:

[0016] A first sliding block, which is disposed at the bottom of the movable plate, and the first sliding block is slidably matched with a first sliding groove provided at the upper end of the first plate body;

[0017] A first motor is disposed on the side of the first plate, and an output shaft of the first motor passes through the side wall of the first plate and extends into the first slide groove;

[0018] The first screw rod is connected to the output shaft of the first motor, and the first screw rod is matched with a first screw rod groove formed on the surface of the first sliding block.

[0019] As a preferred technical solution of the utility model, the drive assembly also includes:

[0020] A second plate body, which is arranged at the upper end of the workbench;

[0021] A second sliding block is disposed at the bottom of the first plate body, and the second sliding block is slidably matched with a second sliding groove provided at the upper end of the second plate body;

[0022] A second motor is disposed on the side of the second plate, and an output shaft of the second motor passes through the first plate and extends into the second slide groove;

[0023] The second screw rod is connected to the output shaft of the second motor, and the second screw rod is matched with a second screw rod groove provided in the second sliding block.

[0024] As a preferred technical solution of the utility model, the linkage assembly includes:

[0025] A rotating shaft, one end of which is rotatably disposed in the inner cavity of the movable plate, and the other end of which is connected to the shifting shaft;

[0026] A first bevel gear connected to the rotating shaft;

[0027] a gear shaft rotatably disposed in the inner cavity of the movable plate;

[0028] a second bevel gear connected to the gear shaft, and the second bevel gear is meshed with the first bevel gear;

[0029] A sleeve is rotatably arranged in a rotating hole provided in the movable plate, and a ratchet mechanism for transmitting the sleeve and the gear shaft is arranged between the sleeve and the gear shaft;

[0030] A driving gear, which is arranged at the outer end of the sleeve;

[0031] A rack is arranged on the upper end of the first plate body to mesh with the driving gear.

[0032] As a preferred technical solution of the utility model, the ratchet mechanism includes a convex tooth provided on the inner wall of the sleeve, and at least one engaging portion arranged in an array about the central axis of the gear shaft, and the engaging portion includes:

[0033] A rotating plate, which is rotatably arranged on the outer surface of the gear shaft, and the rotating plate cooperates with the convex teeth;

[0034] An elastic member has one end connected to the gear shaft, and the other end of the elastic member is connected to the rotating plate.

[0035] As a preferred technical solution of the utility model, the outer surface of the convex plate is provided with anti-slip grooves for increasing the friction coefficient with the pressure ring.

[0036] As a preferred technical solution of the utility model, a limiting block is arranged at the bottom of the convex plate, and the size of the limiting block is larger than the through slot.

[0037] Compared with the prior art, the beneficial effects of the utility model are:

[0038] The utility model arranges a cylinder on the side of the first movable plate and arranges a convex plate inside the cylinder. When the driving component drives the two movable plates to move closer, the linkage component synchronously drives the convex portion on the surface of the shift shaft to contact the bottom end of the convex plate, thereby driving the convex plate to extend in the through groove to apply pressure to the inner wall of the pressure ring sleeved on the outside of the cylinder, thereby limiting the rotational freedom of the pressure ring. When the two movable plates are separated, the concave area on the surface of the shift shaft is synchronously driven to contact the bottom end of the convex plate, thereby driving the convex plate to retract in the through groove, thereby canceling the pressure on the inner wall of the pressure ring sleeved on the outside of the cylinder, thereby facilitating the removal of the pressure ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0040] Figure 2 It is a schematic diagram of a partially cutaway three-dimensional structure of a first plate body of the utility model;

[0041] Figure 3 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the sleeve of the utility model;

[0043] Figure 5 For the utility model Figure 4 The enlarged structural diagram at B in the middle;

[0044] Figure 6 It is a schematic diagram of a partially cutaway three-dimensional structure of a cylinder of the present utility model.

[0045] In the figure: 1, workbench; 2, second plate body; 3, second motor; 4, second screw rod; 5, first plate body; 6, first motor; 7, first screw rod; 8, first movable plate; 9, cylinder; 10, convex plate; 11, through groove; 12, limit block; 13, shift shaft; 14, rotating shaft; 15, first bevel gear; 16, gear shaft; 17, second bevel gear; 18, sleeve; 19, driving gear; 20, rack; 21, rotating plate; 22, elastic member; 23, convex tooth; 24, second movable plate; 25, through opening. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0047] See also Figure 1-Figure 6The utility model provides a technical solution: a positioning mechanism for valve processing, comprising: a workbench 1, which is used to connect with a device for processing a pressure ring; a first plate body 5 arranged on the workbench 1 and at least two movable plates relatively arranged at the upper end of the first plate body 5, namely a first movable plate 8 and a second movable plate 24, and a driving component for driving the first movable plate 8 and the second movable plate 24 to move closer to or apart from each other, specifically, the driving component comprises: a first slider, which is arranged at the bottom of the movable plate, and the first slider is slidably matched with a first slide groove opened at the upper end of the first plate body 5; a first motor 6, which is arranged on the side of the first plate body 5, and the output shaft of the first motor 6 passes through the side wall of the first plate body 5 and extends into the first slide groove; a first screw rod 7, which is connected to the output shaft of the first motor 6, and the first screw rod 7 is matched with a first screw rod groove opened on the surface of the first slider, and a cylinder 9, which is arranged on the side of the first movable plate 8 facing the second movable plate 24;

[0048] The above technical solution can drive the first movable plate 8 and the second movable plate 24 to move closer to or apart from each other, and the pressure ring to be processed is sleeved on the outside of the cylinder 9. The first motor 6 is started to drive the first screw 7 to rotate, thereby driving the first movable plate 8 and the second movable plate 24 to move closer to each other, until the first movable plate 8 and the second movable plate 24 move closer to each other and fit the side of the pressure ring, thereby preventing the pressure ring from sliding along the cylinder 9 during processing.

[0049] Further, such as Figure 1 As shown, the driving assembly also includes: a second plate body 2, which is arranged at the upper end of the workbench 1; a second slider, which is arranged at the bottom of the first plate body 5, and the second slider is slidably matched with a second slide groove opened at the upper end of the second plate body 2; a second motor 3, which is arranged on the side of the second plate body 2, and the output shaft of the second motor 3 passes through the first plate body 5 and extends into the second slide groove; a second screw rod 4, which is connected to the output shaft of the second motor 3, and the second screw rod 4 is matched with the second screw rod groove opened in the second slider;

[0050] The above technical solution can be used to conveniently adjust the processing position of the pressure ring. By starting the second motor 3 to drive the second screw 4 to rotate, and then driving the first plate 5 to slide, the processing position of the pressure ring can be conveniently adjusted.

[0051] like Figure 2 and Figure 6 As shown, the positioning mechanism for valve processing also includes: a convex plate 10, which is slidably arranged in a through groove 11 opened on the side of the cylinder 9; a dial shaft 13, which is located in the cylinder 9, and the outer surface of the dial shaft 13 extending along the central axis direction is provided with a plurality of convex parts at intervals, and adjacent convex parts form a concave area, and the surface of the dial shaft 13 is in conflict with the bottom end of the convex plate 10. In this embodiment, the convex plate 10 is a plate-shaped structure with an arc surface;

[0052] By adopting the above technical solution, the convex plate 10 can apply pressure to the inner wall of the pressure ring through the rotation of the shift shaft 13, so as to prevent the pressure ring from rotating around the cylinder 9 during the processing. Specifically, when the recessed area of ​​the shift shaft 13 abuts against the bottom of the convex plate 10, the convex plate 10 descends to release the restriction on the turning freedom of the pressure ring. When the highest point of the raised part of the shift shaft 13 abuts against the bottom of the convex plate 10, the convex plate 10 rises to limit the turning freedom of the pressure ring.

[0053] Furthermore, the outer surface of the convex plate 10 is provided with anti-slip grooves for increasing the friction coefficient with the pressure ring;

[0054] The adoption of the above technical solution can further improve the friction coefficient between the convex plate 10 and the inner wall of the pressing ring, thereby preventing the pressing ring from rotating during the processing.

[0055] Furthermore, Figure 6 As shown, a limit block 12 is provided at the bottom of the convex plate 10, and the size of the limit block 12 is larger than the through slot 11;

[0056] The above technical solution can prevent the convex plate 10 from flying out of the through slot 11, thereby preventing parts from being lost.

[0057] like Figure 4 As shown, the positioning mechanism for valve processing also includes a linkage assembly, which is used to synchronously drive the raised portion on the surface of the shift shaft 13 to contact the bottom end of the convex plate 10 when the driving assembly drives the two movable plates to move closer, thereby driving the convex plate 10 to extend out of the through groove 11 to apply pressure to the inner wall of the pressure ring sleeved on the outside of the cylinder 9; specifically, the linkage assembly includes: a rotating shaft 14, one end of which is rotatably arranged in the inner cavity of the first movable plate 8, and the other end of the rotating shaft 14 is connected to the shift shaft 13; a first bevel gear 15, which is connected to the rotating shaft 14 and the rotating shaft 13; The first movable plate 8 is connected to the gear shaft 14; the gear shaft 16 is rotatably arranged in the inner cavity of the first movable plate 8; the second bevel gear 17 is connected to the gear shaft 16, and the second bevel gear 17 is meshed with the first bevel gear 15; the sleeve 18 is rotatably arranged in the rotating hole opened in the first movable plate 8, and a ratchet mechanism for transmitting the two is arranged between the sleeve 18 and the gear shaft 16; the driving gear 19 is arranged at the outer end of the sleeve 18; the rack 20 is arranged at the upper end of the first plate body 5 to mesh with the driving gear 19;

[0058] By adopting the above technical scheme, when the first movable plate 8 moves, the convex plate 10 can apply pressure to the inner wall of the pressure ring to prevent the pressure ring from rotating. During the sliding process of the first movable plate 8, the driving gear 19 will be driven to mesh with the rack 20, thereby driving the driving gear 19 to rotate, and the driving gear 19 drives the sleeve 18 connected thereto to rotate. The sleeve 18 drives the gear shaft 16 to rotate through the ratchet mechanism, and the gear shaft 16 drives the second bevel gear 17 to rotate. The second bevel gear 17 drives the first bevel gear 15 to rotate, and then drives the shift shaft 13 connected to the first bevel gear 15 to rotate. The shift shaft 13 drives its convex portion to contact the bottom of the convex plate 10, thereby pushing the convex plate 10 out of the through groove 11. The convex plate 10 generates pressure on the inner wall of the pressure ring, thereby limiting the turning freedom of the pressure ring along the cylinder 9. As a possible situation, a through hole 25 for the cylinder 9 to penetrate can also be opened on the surface of the second movable plate 24, and the first movable plate 8 and the second movable plate 24 are used to clamp and limit the side of the pressure ring to achieve limiting of pressure rings of different thicknesses.

[0059] Furthermore, Figure 4 and Figure 5 As shown, the ratchet mechanism includes a convex tooth 23 provided on the inner wall of the sleeve 18, and at least one engaging portion arranged in an array about the central axis of the gear shaft 16, and the engaging portion includes: a rotating plate 21, which is rotatably provided on the outer surface of the gear shaft 16, and the rotating plate 21 cooperates with the convex tooth 23; an elastic member 22, one end of which is connected to the gear shaft 16, and the other end of the elastic member 22 is connected to the rotating plate 21; in this embodiment, the elastic member 22 is selected as a spring;

[0060] The adoption of the above technical solution can ensure the stability of the structure. During the sliding of the first movable plate 8, the driving gear 19 will be driven to engage with the rack 20, thereby driving the driving gear 19 to rotate. The driving gear 19 drives the sleeve 18 connected thereto to rotate, and the convex teeth 23 inside the sleeve 18 continuously collide with the rotating plate 21, thereby driving the gear shaft 16 to rotate. Since the rotating plate 21 can rotate, the convex teeth 23 inside the sleeve 18 will not collapse due to the continuous rotation of the first motor 6.

[0061] Working principle: When in use, firstly, the pressure ring to be processed is set on the outside of the cylinder 9, and the first motor 6 is started to drive the first screw 7 to rotate, thereby driving the first movable plate 8 and the second movable plate 24 to move closer to each other. During the sliding process of the first movable plate 8, the driving gear 19 is driven to engage with the rack 20, thereby driving the driving gear 19 to rotate, and the driving gear 19 drives the sleeve 18 connected thereto to rotate, and the convex teeth 23 inside the sleeve 18 continuously collide with the rotating plate 21, thereby driving the gear shaft 16 to rotate, and the gear shaft 16 drives the second bevel gear 17 to rotate, and the second bevel gear 17 drives the first bevel gear 15 to rotate, thereby driving the gear shaft 16 connected to the first bevel gear 17 to rotate. The pull shaft 13 connected to the wheel 15 rotates, and the pull shaft 13 drives the highest point of its protrusion to contact the bottom of the protruding plate 10, so that the protruding plate 10 is pushed out of the through groove 11. The protruding plate 10 generates pressure on the inner wall of the pressure ring, thereby limiting the turning freedom of the pressure ring along the cylinder 9. Since the rotating plate 21 can rotate, the convex teeth 23 inside the sleeve 18 will not collapse due to the continuous rotation of the first motor 6, until the first movable plate 8 and the second movable plate 24 are close to fit the side of the pressure ring, thereby completing the clamping, and then the second motor 3 is started to drive the second screw 4 to rotate, thereby driving the first plate body 5 to slide, so that the processing position of the pressure ring can be easily adjusted;

[0062] It is worth mentioning that in order to ensure that the sleeve 18 can drive the gear shaft 16 to rotate when the first movable plate 8 and the second movable plate 24 are approaching, the elastic force of the elastic member 22 should be large enough, and when the pressure ring needs to be removed, the first motor 6 is started to reverse, so that the first movable plate 8 and the second movable plate 24 are separated from each other. During this process, the sleeve 18 drives the gear shaft 16 to rotate continuously, and the raised and recessed areas on the surface of the dial shaft 13 alternately contact the bottom of the convex plate 10 until the other side of the pressure ring can be removed from the cylinder 9 without touching the second movable plate 24, and at this time the recessed area of ​​the dial shaft 13 just contacts the bottom of the convex plate 10, and the pressure ring can be removed from the cylinder 9.

[0063] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0064] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A positioning mechanism for valve processing, used for positioning a pressure ring in a valve, comprising: A workbench (1) for connecting to a device for processing a pressure ring; A first plate body (5) disposed on the workbench (1) and at least two movable plates disposed relatively on the upper end of the first plate body (5); A driving assembly for driving the two movable plates to move toward or away from each other; Characterized in that the positioning mechanism also includes: A cylinder (9) arranged on the side of one of the movable plates; A convex plate (10) slidably disposed in a through groove (11) provided on a side surface of the cylinder (9); A shifting shaft (13) is located in the cylinder (9), and a plurality of raised portions are arranged at intervals on the outer surface of the shifting shaft (13) extending in the direction of the central axis, and adjacent raised portions form a recessed area, and the surface of the shifting shaft (13) abuts against the bottom end of the convex plate (10); The linkage assembly is used to synchronously drive the raised portion on the surface of the shifting shaft (13) to contact the bottom end of the convex plate (10) when the driving assembly drives the two movable plates to move closer, thereby driving the convex plate (10) to extend out of the through groove (11) to apply pressure to the inner wall of the pressure ring sleeved on the outside of the cylinder (9).

2. The valve processing positioning mechanism according to claim 1, characterized in that: The drive assembly comprises: A first sliding block, which is arranged at the bottom of the movable plate, and the first sliding block is slidably matched with a first sliding groove provided at the upper end of the first plate body (5); A first motor (6) is arranged on a side surface of the first plate body (5), and an output shaft of the first motor (6) passes through a side wall of the first plate body (5) and extends into the first slide groove; A first screw rod (7) is connected to the output shaft of the first motor (6), and the first screw rod (7) cooperates with a first screw rod groove formed on the surface of the first sliding block.

3. The valve processing positioning mechanism according to claim 2, characterized in that: The drive assembly also includes: A second plate (2) disposed on the upper end of the workbench (1); A second sliding block, which is arranged at the bottom of the first plate body (5), and the second sliding block is slidably matched with a second sliding groove formed at the upper end of the second plate body (2); A second motor (3) is arranged on a side surface of the second plate body (2), and an output shaft of the second motor (3) passes through the first plate body (5) and extends into the second slide groove; A second screw rod (4) is connected to the output shaft of the second motor (3), and the second screw rod (4) cooperates with a second screw rod groove provided in the second sliding block.

4. The valve processing positioning mechanism according to claim 1, characterized in that: The linkage assembly comprises: A rotating shaft (14), one end of which is rotatably disposed in the inner cavity of the movable plate, and the other end of the rotating shaft (14) is connected to the shifting shaft (13); A first bevel gear (15) connected to the rotating shaft (14); A gear shaft (16) rotatably disposed in the inner cavity of the movable plate; a second bevel gear (17) connected to the gear shaft (16), and the second bevel gear (17) is meshed with the first bevel gear (15); A sleeve (18) is rotatably arranged in a rotating hole provided in the movable plate, and a ratchet mechanism for transmitting the sleeve (18) and the gear shaft (16) is arranged between the sleeve (18) and the gear shaft (16); A driving gear (19) disposed at the outer end of the sleeve (18); A rack (20) is arranged on the upper end of the first plate (5) to mesh with the driving gear (19).

5. The valve processing positioning mechanism according to claim 4, characterized in that: The ratchet mechanism comprises a convex tooth (23) provided on the inner wall of the sleeve (18), and at least one engaging portion arranged in an array about the central axis of the gear shaft (16), the engaging portion comprising: A rotating plate (21) rotatably disposed on the outer surface of the gear shaft (16), and the rotating plate (21) cooperates with the convex teeth (23); An elastic member (22) has one end connected to the gear shaft (16), and the other end of the elastic member (22) is connected to the rotating plate (21).

6. The valve processing positioning mechanism according to claim 1, characterized in that: The outer surface of the convex plate (10) is provided with anti-slip grooves for increasing the friction coefficient with the pressure ring.

7. The valve processing positioning mechanism according to claim 1, characterized in that: A limiting block (12) is provided at the bottom of the convex plate (10), and the size of the limiting block (12) is larger than the through slot (11).

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