Follow fixture for welding and machining angle type jacket stop valve

Abstract

The invention belongs to clamps, and particularly relates to a follow clamp for welding and machining an angle type jacket stop valve. Counterbores are formed in the four corners of the mounting bottom plate, a plurality of positioning holes are formed in the mounting bottom plate, the positions and the number of the positioning holes are matched with the models of valves to be welded, a plurality of threaded holes are formed in the mounting bottom plate, the positions and the number of the threaded holes form a grid shape, and it is guaranteed that when fastening connection needs to be carried out, the threaded holes can be screwed into the mounting bottom plate. Threaded holes for use can be formed; the supporting and locking assembly is used for supporting and locking a valve to be welded; the positioning bolt assembly is used for positioning a valve to be welded; the positioning and supporting assembly is used for positioning and supporting a valve to be welded; and the welding fixing plate is used for fixing the positions of the valve to be welded and the flange to be welded. The method has the remarkable effects that deformation and errors of the parts are effectively controlled; the repeatability and the stability of the manufacturing process are ensured; the processing efficiency and the product quality are improved; and the universality is high.

Description

Technical Field

[0001] This invention pertains to clamps, specifically relating to the positioning, support, and clamping of an angle-type jacketed gate valve during welding and machining processes. It is applied to gate valves with a loose flange structure at the valve end and an external jacket, and the pipeline is butt-welded. Background Technology

[0002] Angle gate valves perform excellently in industrial applications and are a common type of valve. Their inlet and outlet channels form a 90° angle, controlling fluid flow by opening or closing the valve. The externally designed jacket ensures stable operation in harsh environments. The jacket protects the system, reducing energy consumption, preventing condensation and corrosion, and providing good insulation and durability. The loose flange structure at the ends allows for flexible connection between pipes of different diameters. However, because the loose flanges at both ends are movable and can move outside the jacket connector, they can easily get caught on the jacket wall during production and handling. Since the jacket wall is not very thick, this can easily cause jacket deformation. Furthermore, during welding, maintaining a 90° angle between the connector and the channel hole, coupled with the flange weight at the jacket connector, can easily cause welding deformation and displacement. Therefore, the loose flanges need to be fixed during welding; otherwise, the workpiece's vertical and horizontal movement during welding can affect the accuracy of the valve welding process. Similarly, the flange must be fixed before finishing after welding, and the absolute position of the jacketed pipe and valve body after welding must be 90°. Therefore, special fixtures must be designed to position, support and fix the parts. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a traveling fixture for welding and machining angle jacketed gate valves.

[0004] This invention is implemented as follows: A traveling fixture for welding and machining an angle jacketed gate valve, comprising a mounting base plate with countersunk holes at its four corners, a plurality of positioning holes on the mounting base plate, the position and number of which match the model of the valve to be welded, a plurality of threaded holes on the mounting base plate forming a grid to ensure that there are usable threaded holes when fastening is required; a support and locking assembly for supporting and locking the valve to be welded; a positioning bolt assembly for positioning the valve to be welded; a positioning support assembly for positioning and supporting the valve to be welded; and a welding fixing plate for fixing the valve and flange to be welded in position.

[0005] As described above, a traveling fixture for welding and machining an angle jacketed gate valve includes a support and locking assembly comprising a bracket base plate, a V-shaped locking block on the bracket base plate, a reinforcing rib on one side of the V-shaped locking block, a flange gasket on the other side of the V-shaped locking block, several reserved holes on the bracket base plate, positioning pins and bolts in the reserved holes, and a jacketed pipe fitting. The V-shaped locking block and the jacketed pipe fitting cooperate to achieve outer circle positioning.

[0006] As described above, a traveling fixture for welding and machining an angle jacketed gate valve includes a flange gasket with a plate-like structure. The front side has a positioning arc surface that matches the outer circular surface of the loose flange, and the bottom side has positioning holes and threaded holes.

[0007] As described above, a traveling fixture for welding and machining an angle jacketed gate valve includes an adjustable positioning bolt assembly with a positioning ring at the end of the adjustable positioning bolt. The size of the positioning ring matches the valve to be welded.

[0008] As described above, a traveling fixture for welding and machining an angle jacketed gate valve includes a positioning support assembly comprising a base, a through hole on the base, a support rod disposed in the through hole, and an adjusting locking nut fitted onto the support rod.

[0009] As described above, a traveling fixture for welding and machining an angle jacketed gate valve includes a welding fixing plate, which is a plate-shaped part with a positioning cone hole and a flange hole.

[0010] The aforementioned angle jacketed gate valve welding and machining accompanying fixture further includes a pressure plate and a T-block for fixing the valve.

[0011] The significant effects of this invention are: (1) effectively controlling part deformation and error, providing a reliable basis for subsequent processing; (2) improving the geometric shape and dimensional accuracy of parts, ensuring the repeatability and stability of the manufacturing process; (3) effectively improving processing efficiency and product quality; (4) multiple sets of positioning holes can realize modular design to cover multiple specifications of valves, with strong versatility. Attached Figure Description

[0012] Figure 1a This is a schematic diagram of the "V-shaped locking bracket" structure.

[0013] Figure 1b yes Figure 1a The right view;

[0014] Figure 1c yes Figure 1a A three-dimensional image;

[0015] Figure 2 This is a schematic diagram of the "positioning mandrel" structure;

[0016] Figure 3 This is a schematic diagram of the adjustable support structure;

[0017] Figure 4 This is a schematic diagram of the welding fixing plate structure;

[0018] Figure 5 This is a schematic diagram of the mounting base structure;

[0019] Figure 6 Schematic diagram of the positioning and support mechanism installation

[0020] Figure 7 A schematic diagram of a partial structure for welding positioning and clamping of the fixture;

[0021] Figure 8 This is a schematic diagram of the accompanying fixture used for welding and machining an angle jacketed gate valve.

[0022] In the diagram: 1-Bracket base plate; 2-V-type locking block; 3-Flange gasket; 4-Reinforcing rib; 5-D10 cylindrical locating pin; 6-M16X45 socket head cap bolt; 7-M8X45 socket head cap bolt; 8-Locating ring; 9-Adjustable locating bolt; 10-Base; 11-Adjusting locking nut; 12-Support rod; 13-Welded fixing plate; 14-Locating conical hole; 15-Flange hole; 16-Mounting base plate; 17-Counterhead hole; 18-Locating hole; 9-Threaded hole; 20-Valve body; 21-Loose flange; 22-Clad fitting (made of a jacket ring, fitting, and outer jacket welded together as a whole); 23-M20X220 socket head cap screw; 24-Flat washer; 25-Hex nut; 26-M20X150 socket head cap screw; 27-D20 internal thread cylindrical locating pin; 28-M16 screw; 29-M16 adjusting lock nut; 30-Pressure plate; 31-T-block; 32-Machine tool worktable. Detailed Implementation

[0023] The following will illustrate this with specific implementation examples.

[0024] 1. As shown in Figure 1, insert four D10 positioning cylindrical pins 5 into the positioning holes of the bracket base plate 1, insert the bottom positioning holes of the V-shaped locking block 2 into the D10 positioning cylindrical pins 5, insert the bottom positioning holes of the flange gasket 3 into the D10 positioning cylindrical pins 5, install hexagon socket bolts 6 in the countersunk holes on the reverse side of the bracket base plate 5, and tighten and fix the V-shaped locking block 2 and the flange gasket 3 onto the bracket base plate 1 using the hexagon socket bolts 6; the threaded holes on the bottom side of the reinforcing rib 4 mate with the countersunk holes of the bracket base plate 1 and are tightened and fixed onto the bracket base plate 1 using hexagon socket bolts 7, and at the same time, the threaded holes on the side of the reinforcing rib 4 mate with the countersunk holes on the reverse side of the V-shaped locking block 2 and are tightened and fixed to the V-shaped locking block 2 using hexagon socket bolts 7; the above positioning, assembly, connection and fixing finally form a "V-shaped locking bracket";

[0025] 2. For example Figure 2 As shown, screw the adjustable positioning bolt 9 into the internal thread of the positioning ring 8, and adjust it to the corresponding positioning length according to the length of the shut-off valve pipe; after assembly, a "positioning mandrel" is formed.

[0026] 3. For example Figure 3 As shown, screw the adjusting lock nut 11 into the adjusting rod 12, then screw the external thread of the adjusting rod 12 into the internal thread hole of the base 10, adjust to the required positioning height, and lock the adjusting lock nut 11.

[0027] 4. For example Figure 5 As shown, the mounting base plate 16 has multiple sets of positioning holes. Select the corresponding positioning hole according to the valve body size and insert the D20 internal thread cylindrical positioning pin into the positioning hole.

[0028] 5. For example Figure 6 As shown, insert the positioning hole on the bracket base plate 1 of the "V-type locking bracket" into the D20 internal thread cylindrical positioning pin 27, and install the internal hex bolts 7 in the U-shaped grooves at both ends of the bracket base plate 1. Tighten the bolts to fix the "V-type locking bracket" on the mounting base plate 16.

[0029] 6. Place the support base in the required support position. There is no need to fix the base, which facilitates flexible adjustment of the assembled parts later.

[0030] The above describes the specific installation steps of the clamp. The following describes the installation steps of the loose flange, valve body, and jacketed pipe on the clamp:

[0031] 1. Install loose flange 21: Fit the outer circle of loose flange 21 with the arc surface of flange gasket 3 to form support for loose flange 21. At the same time, pass hex bolts 26 through the countersunk hole of V-locking block. Lock the end face of loose flange 21 with flat washer 24 and hex nut 25 to fix loose flange 21 on "V-locking bracket".

[0032] 2. Install valve body 20: Place the positioning plane of valve body 20 on the plane of adjustable support base support rod 12, and align the two end channel holes with the center of the two "V-shaped locking brackets" respectively (no need for precise placement, approximate position is fine);

[0033] 3. Install the jacketed connector 22: The jacketed connector 22 passes through the inner hole of the loose flange 21, and the outer circle is placed on the V-groove of the "V-type locking bracket". At the same time, the "positioning mandrel" passes through the inner hole of the jacketed connector 21 and is inserted into the channel hole of the valve body 20. The positioning ring 8 positions the channel holes at both ends and forms a supporting function. Similarly, the other end of the jacketed connector 21 is assembled as above.

[0034] 4. Install welding fixing plate 13: align the positioning cone surface 14 of welding fixing plate 13 with the cone surface of the jacket tube 22, pass the end face through the internal hex bolt 23, and tighten and fix it on the jacket tube 22 with flat washer 24 and hex nut 25;

[0035] The above steps achieve the installation, positioning, support, and fixation of the parts, such as... Figure 7 As shown;

[0036] After completing the above steps, connect the M16 screw 28 to the threaded hole 19 on the mounting base plate 16, and lock the screw onto the mounting base plate 16 with the M16 adjusting nut 29. Adjust the corresponding support height according to the actual height of the valve body with the M16 adjusting nut. The M16 screw 28 passes through the waist groove of the pressure plate 30, and the pressure plate 30 presses against the plane of the valve body 20. Lock and fix it with the M16 adjusting nut to achieve the fixation of the valve body. Welding is performed after all installations are completed.

[0037] After welding, the same accompanying fixture is used during machining as a whole.

[0038] The fixture is hoisted onto the machine tool table. M16X45 socket head cap screws 6 are installed in the countersunk holes 17 of the mounting base plate 16. The accompanying fixture is fixed to the machine tool worktable 32 via connection with the T-block 31. During machining, the initial calibration can find the "zero point" by centering the fixture, enabling continuous machining without needing to calibrate the origin after each machining cycle, saving calibration time and improving machining efficiency. The installation and usage diagram is shown below. Figure 8 As shown;

[0039] The principle of this invention is as follows: The positioning of the "V-shaped locking bracket" is achieved through the positioning holes on the mounting base plate 16, ensuring that the angle of the two end sleeve pipes 22 is 90° after assembly. The "positioning mandrel" forms positioning and support between the channel hole of the sleeve pipe 22 and the channel hole of the valve body 20. The support plane of the support rod 12 supports the valve body 20. This invention patent restricts the five degrees of freedom of the parts in space through the combination of two V-shaped grooves, two positioning rings and a plane, namely the movement and rotation in the X and Y directions and the rotation in the Z direction. The movement of the valve body in the Z direction is finally connected and fixed by the pressure plate 30, M16 screw 28 and M16 adjusting nut 29, completely restricting the six degrees of freedom in space.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal connection of two parts. For those skilled in the art, the specific meanings of the above in this patent can be understood through the specific circumstances.

[0041] The above description describes embodiments of the present invention and is not intended to limit the invention. It should be noted that several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should be considered within the scope of protection of the present invention.

Claims

1. A traveling fixture for welding and machining an angle-type jacketed gate valve, characterized in that: The system includes a mounting base plate (16) with countersunk holes (17) at its four corners, and a number of positioning holes (18) on the mounting base plate (16). The position and number of the positioning holes (18) match the model of the valve to be welded. The mounting base plate (16) also has a number of threaded holes (19) in a grid pattern to ensure that there are available threaded holes (19) when fastening is required. The system also includes a support and locking assembly for supporting and locking the valve to be welded, a positioning bolt assembly for positioning the valve to be welded, a positioning support assembly for positioning and supporting the valve to be welded, and a welding fixing plate (13) for fixing the valve and flange to be welded in position.

2. The accompanying fixture for welding and machining an angle-type jacketed gate valve as described in claim 1, characterized in that: The support locking assembly includes a bracket base plate (1), a V-shaped locking block (2) is provided on the bracket base plate (1), a reinforcing rib (4) is provided on one side of the V-shaped locking block (2), a flange gasket (3) is provided on the other side of the V-shaped locking block (2), a number of reserved holes are provided on the bracket base plate (1), positioning pins and bolts are provided in the reserved holes, and a jacketed pipe (22) is also included. The V-shaped locking block (2) and the jacketed pipe (22) cooperate to achieve outer circle positioning.

3. The accompanying fixture for welding and machining an angle-type jacketed gate valve as described in claim 2, characterized in that: The flange gasket (3) is a plate-shaped structure with a positioning arc surface on the front, which matches the outer circular surface of the loose flange. The bottom surface has positioning holes and threaded holes.

4. The accompanying fixture for welding and machining an angle-type jacketed gate valve as described in claim 3, characterized in that: The positioning bolt assembly includes an adjustable positioning bolt (9) with a positioning ring (8) at the end of the adjustable positioning bolt (9), the size of which matches the valve to be welded.

5. The accompanying fixture for welding and machining an angle-type jacketed gate valve as described in claim 4, characterized in that: The positioning support assembly includes a base (10), a through hole is provided on the base (10), a support rod (12) is provided in the through hole, and an adjusting locking nut (11) is sleeved on the support rod (12).

6. The accompanying fixture for welding and machining an angle-type jacketed gate valve as described in claim 5, characterized in that: The welding fixing plate (13) is a plate-shaped part, and a positioning cone hole (14) and a flange hole (15) are provided on the welding fixing plate (13).

7. The accompanying fixture for welding and machining an angle-type jacketed gate valve as described in claim 6, characterized in that: It also includes a pressure plate (30) and a T-block (31) for fixing the valve.

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