Back face embedded rear pull welding end sealing device

Abstract

The invention discloses a sealing device for a back embedded rear pull welding end. The sealing device comprises a workpiece, a sealing assembly, an overload assembly and a replacement assembly, the sealing assembly is installed at an opening of the welding end of the workpiece, a protruding part is arranged at the opening of the welding end of the workpiece, a sealing plate is arranged on the workpiece, a chock plug is arranged in the sealing plate, an O-shaped ring is arranged on the chock plug, and a nylon gasket is connected into the sealing plate in a sliding mode. The check ring is connected to the workpiece in a sleeving mode, then the two semicircular check rings are clamped in the check ring clamping grooves, the bolt penetrates through the check ring to be connected with the sealing plate, meanwhile, the rotating rod penetrates through the arc cutter to be clamped, then the bolt is screwed so that the semicircular check rings can be tightly attached to the protruding portion of the welding end of the workpiece, and meanwhile an O-shaped ring and a nylon gasket in the sealing plate can be attached to the end face of the welding end of the workpiece; the end face sealing plate is used for tensioning the check ring and tensioning and fixing the end face sealing plate through the bolts, so that the end face sealing effect is achieved, meanwhile, the tool assembling efficiency is improved, and unstable factors of a sealing tool are eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of workpiece water pressure test, and particularly relates to a back-embedded post-pull welding end sealing device. BACKGROUND

[0002] Water pressure test is a core inspection process before workpiece delivery, which detects the sealing performance and pressure resistance of the weld and base material by filling high-pressure water into the workpiece, directly verifies whether the welding quality meets the standard, and only the workpiece passing the water pressure test can be confirmed to be free of defects such as pores and cracks, thereby ensuring the safety in subsequent use. However, in order to ensure welding accuracy and subsequent assembly compatibility, some workpieces do not have flanges, bolt holes or other connecting structures on the welding end face, which directly challenges the sealing process of water pressure test.

[0003] There are three sealing methods for welding ends without preset connecting structures, one is temporary flange sealing, which assembles a sealing plate after welding a temporary flange on the welding end of the workpiece, and cuts and removes it after the test; the second is a binding type of tight sealing, which realizes plugging by squeezing a sealing gasket around the outside of the workpiece through a metal hoop or a rope; the third is a bonding type of sealing, which bonds and fixes the sealing gasket to the welding end face by using sealing glue.

[0004] However, temporary flange welding not only increases the welding and removal process, prolongs the test period, but also causes welding end deformation and material property change due to high temperature, and welding residues easily contaminate the sealing surface; the binding type of tight sealing has poor positioning accuracy, uneven pressure transmission, and the sealing gasket is easy to fall off and leak under high pressure, and the operation efficiency is low; the bonding type of sealing is greatly affected by environmental temperature and humidity, has a long curing time, and the sealing gasket cannot be reused, and the sealing surface is easily damaged by residual adhesive when disassembled.

[0005] Therefore, the present application provides a back-embedded post-pull welding end sealing device. SUMMARY

[0006] The present application aims at solving the problems in the prior art and provides a back-embedded post-pull welding end sealing device.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0008] A back-embedded post-pull welding end sealing device, comprising a workpiece, a sealing assembly, an overload assembly and a replacement assembly;

[0009] The sealing assembly is installed at the welding end opening of the workpiece, the welding end opening of the workpiece has a protruding part, the workpiece is provided with a sealing plate, the sealing plate is provided with a plug, the plug is provided with an O-ring, and the sealing plate is slidably connected with a nylon gasket;

[0010] The sealing assembly is used for sealing the welding end face of the workpiece;

[0011] The overload assembly is used for warning that the internal pressure of the workpiece is too large;

[0012] The replacement assembly is used for replacing the nylon gasket regularly, so as to ensure the sealing of the welding end of the workpiece.

[0013] Preferably, the sealing assembly comprises two semicircular blocking rings, two bolts and a blocking ring, the blocking ring is sleeved on the workpiece, the two semicircular blocking rings are arranged in the blocking ring respectively, and the bolts are slidingly connected on the blocking ring and the sealing plate.

[0014] Preferably, the overload assembly comprises two rotating rods, two contact sensors and an alarm, the two rotating rods are slidingly connected in the sealing plate respectively, the two contact sensors are fixedly installed on the two semicircular blocking rings respectively, and the alarm is fixedly installed on the sealing plate.

[0015] Preferably, the replacement assembly comprises a knob, a threaded surface and a pressing ring, the threaded surface is arranged on the plug head, the pressing ring is slidingly connected on the threaded surface, and the knob is rotationally connected on the sealing plate.

[0016] Preferably, the blocking ring is provided with a clamping groove, the two semicircular blocking rings are clamped in the clamping groove of the blocking ring respectively, the two semicircular blocking rings are tightly attached to the protruding part at the opening of the welding end of the workpiece through the bolts, the bolts are provided with a circular groove, and the two bolts are respectively provided with a residual cleaning assembly.

[0017] Preferably, one end of the two rotating rods is in contact with the two contact sensors respectively, the contact sensors send signals to the control system, and the alarm sends an alarm.

[0018] Preferably, the knob is fixedly connected on the plug head, one end of the nylon gasket is attached to the welding end surface of the workpiece, and the other end is attached to the pressing ring.

[0019] Preferably, the residual cleaning assembly comprises two arc knives, a gear ring and a gear, the gear is fixedly connected with the rotating rod, the gear is slidingly connected in the circular groove, the gear ring is rotationally connected in the circular groove, and the arc knife is rotationally connected in the sealing plate.

[0020] Preferably, the gear is meshingly connected with the gear ring, the arc knife is provided with a torsional spring at the connecting position with the sealing plate, the gear ring is provided with two sockets, and the protruding part of the rotating rod is clamped on the arc knife.

[0021] Preferably, two connecting rods are slidingly connected on the bolts, one end of the connecting rod is fixedly connected with a pressing block, a spring is fixedly connected between the pressing block and the bolt, and the spring is sleeved on the connecting rod.

[0022] The application has the following beneficial effects:

[0023] I. Through the sealing assembly, the retaining ring is first sleeved on the workpiece, then the two semicircular retaining rings are clamped in the retaining ring clamping groove, the bolt passes through the retaining ring and is connected with the sealing plate, at the same time, the rotating rod passes through the arc knife and is clamped, then the bolt is screwed to make the semicircular retaining ring tightly adhere to the protruding part of the workpiece welding end, at the same time, the O-ring and the nylon washer in the sealing plate are in close contact with the end face of the workpiece welding end, and the end face sealing plate is used to tighten the retaining ring by means of the bolt, so that the end face sealing plate is tightly fixed, so as to achieve the effect of end face sealing, improve the assembly efficiency of the tool, and eliminate the unstable factors of the sealing tool.

[0024] II. Through the overload assembly, when the bolt is tightened, at the same time, one end of the rotating rod is in contact with the contact sensor, when the internal pressure of the workpiece is too large, the pressure pushes the sealing plate to produce a small displacement, which drives the rotating rod to move synchronously, so that the contact between the rotating rod and the contact sensor is released, and then the contact sensor sends a signal to the control system, and the control system makes the alarm sound an alarm sound to remind that the internal pressure of the workpiece is too large, so as to avoid the safety hazards such as deformation of the workpiece, damage of the sealing device or leakage of high-pressure medium caused by high pressure.

[0025] III. Through the residual cleaning assembly, the bolt is loosened to expose the plug, then the pressing block is pressed to drive the connecting rod to insert into the insertion port, and the bolt is continuously twisted back and forth, which can drive the gear ring to rotate, the gear ring drives the gear and the rotating rod to rotate, so that the arc knife clamped on the rotating rod can scrape off the welding slag and impurities of the nylon washer remaining on the sealing surface in the rotating process, so as to avoid the problems such as tight sealing caused by impurities and medium leakage during high-pressure test, and the damaged nylon washer can be scraped off.

[0026] IV. Through the replacement assembly, after the damaged nylon washer is scraped off, the plug is rotated by twisting the knob, so that the pressure ring on the threaded surface presses the nylon washer to slide downward, so that the new nylon washer is exposed from the sealing plate, and the replacement is completed, avoiding the complicated operation of disassembling the whole device in the traditional way, reducing the time-consuming of replacement, and improving the maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a back-embedded rear pull welding end sealing device overall structure schematic diagram;

[0028] Figure 2 It is a back-embedded rear pull welding end sealing device workpiece shape structure display diagram;

[0029] Figure 3 It is a back-embedded rear pull welding end sealing device workpiece welding end connecting structure schematic diagram of the parts;

[0030] Figure 4 It is a back-embedded rear pull welding end sealing device workpiece, retaining ring and sealing plate sectional view;

[0031] Figure 5 An exploded view of a back-embedded, post-welded end sealing device with retaining ring and two semi-circular retaining rings proposed in this invention;

[0032] Figure 6 This is an internal sectional view of a sealing plate for a back-embedded, post-welded end sealing device proposed in this invention;

[0033] Figure 7 This is an exploded view of a knob, plug, pressure ring, and nylon gasket for a back-embedded, welded-end sealing device proposed in this invention.

[0034] Figure 8 This is a schematic diagram of the internal cross-sectional view of one end of the bolt of the back-embedded post-weld end sealing device proposed in this invention.

[0035] Figure 9 for Figure 8 Enlarged diagram of point A in the diagram.

[0036] In the diagram: 1. Workpiece; 2. Retaining ring; 3. Semi-circular retaining ring; 4. Sealing plate; 5. Bolt; 6. Nylon washer; 7. O-ring; 8. Alarm; 9. Knob; 10. Rotating rod; 11. Arc cutter; 12. Gear ring; 13. Connecting rod; 14. Contact sensor; 15. Pressure ring; 16. Threaded surface; 17. Plug; 18. Press block; 19. Circular groove; 20. Gear; 21. Insert; 22. Spring. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Example 1:

[0039] Reference Figures 1 to 5 A back-embedded back-pull-out welding end sealing device includes a workpiece 1, a sealing component, an overload component, and a replacement component; the sealing component is installed at the welding end opening of the workpiece 1, the welding end opening of the workpiece 1 has a protrusion, the workpiece 1 is provided with a sealing plate 4, the sealing plate 4 is provided with a plug 17, the plug 17 is provided with an O-ring 7 to enhance the sealing effect between the plug 17 and the workpiece 1, and a nylon gasket 6 is slidably connected in the sealing plate 4 to directly fit the welding end face of the workpiece 1 to achieve sealing.

[0040] The sealing assembly is used to seal the weld end face of workpiece 1;

[0041] The overload component is used to warn and remind workpiece 1 that the internal pressure is too high;

[0042] The replacement component is used to periodically replace the nylon gasket 6, thereby ensuring the sealing of the weld end of workpiece 1.

[0043] The sealing assembly includes two semi-circular retaining rings 3, two bolts 5, and a retaining ring 2. The retaining ring 2 is fitted onto the workpiece 1 and serves to support the semi-circular retaining rings 3 and connect the sealing plate 4. The two semi-circular retaining rings 3 are respectively set inside the retaining ring 2. The retaining ring 2 is provided with a slot, and the two semi-circular retaining rings 3 are respectively engaged in the slot of the retaining ring 2 to achieve the positioning and installation of the semi-circular retaining rings 3. The bolts 5 are slidably connected to the retaining ring 2 and the sealing plate 4. The tension force is transmitted by tightening the bolts 5. The two semi-circular retaining rings 3 are tightly attached to the protrusion at the weld end opening of the workpiece 1 through the bolts 5 to form a temporary fixed base to compress the sealing surface. The bolts 5 are provided with a circular groove 19, and the two bolts 5 are respectively provided with a residue cleaning component.

[0044] In this embodiment, the retaining ring 2 is first fitted onto the workpiece 1, and then two semi-circular retaining rings 3 are snapped into the retaining ring 2 slots. The bolts 5 are passed through the retaining rings 2 and connected to the sealing plate 4. At the same time, the rotating rod 10 passes through the arc knife 11 and is snapped in place. Then, the bolts 5 are tightened to make the semi-circular retaining rings 3 fit tightly against the weld end protrusion of the workpiece 1. Meanwhile, the O-ring 7 and nylon washer 6 in the sealing plate 4 fit against the weld end face of the workpiece 1. The end face sealing plate 4 is tightened by the bolts 5 to pull the retaining ring 2 and tighten and fix the end face sealing plate 4 to achieve the end face sealing effect. At the same time, the tooling assembly efficiency is improved and the unstable factors of the sealing tooling are eliminated.

[0045] Example 2:

[0046] Unlike Example 1, referring to Figure 1 , Figure 3 , Figure 5 and Figure 6 This embodiment also has the following further features:

[0047] The overload assembly includes two rotating rods 10, two contact sensors 14, and an alarm 8. The two rotating rods 10 are slidably connected inside the sealing plate 4 and can slide synchronously with the pressure displacement of the sealing plate 4. They can also rotate under the rotation of the gear 20. The two contact sensors 14 are fixedly installed on two semi-circular retaining rings 3 to sense changes in the contact state of the rotating rods 10. The alarm 8 is fixedly installed on the sealing plate 4 to receive signals and issue an overload alarm. One end of each of the two rotating rods 10 is in contact with the two contact sensors 14, forming a pressure sensing linkage structure. The contact sensors 14 send signals to the control system to cause the alarm 8 to sound an alarm, realizing the warning feedback of pressure overload.

[0048] In this embodiment, when the bolt 5 is tightened, at the same time, one end of the rotating rod 10 contacts the contact sensor 14. When the internal pressure of the workpiece 1 is too high, the pressure pushes the sealing plate 4 to produce a slight displacement, which drives the rotating rod 10 to move synchronously. Thus, the contact between the rotating rod 10 and the contact sensor 14 is released, and the contact sensor 14 sends a signal to the control system. The control system then causes the alarm 8 to sound an alarm to remind that the internal pressure of the workpiece 1 is too high, so as to avoid safety hazards such as deformation of the workpiece 1, damage to the sealing device, or leakage of high-pressure medium due to excessive pressure.

[0049] Example 3:

[0050] Reference Figures 6 to 9 Compared to Embodiment 1 and Embodiment 2, in this embodiment:

[0051] The replacement components include a knob 9, a threaded surface 16, and a pressure ring 15. The threaded surface 16 is set on the plug 17, and the pressure ring 15 is slidably connected to the threaded surface 16, achieving axial sliding through threaded transmission. The knob 9 is rotatably connected to the sealing plate 4 and fixedly connected to the plug 17. Rotating the knob 9 can drive the plug 17 to rotate synchronously. One end of the nylon washer 6 is attached to the weld end face of the workpiece 1, and the other end is attached to the pressure ring 15. The pressure ring 15 presses the nylon washer 6 to achieve a seal.

[0052] The residue removal assembly includes two arc blades 11, a gear ring 12, and a gear 20. The gear 20 is fixedly connected to the rotating rod 10 and slidably connected in the circular groove 19, which limits the movement trajectory of the gear 20. The gear ring 12 is rotatably connected in the circular groove 19, providing a meshing transmission carrier for the gear 20. The arc blades 11 are rotatably connected in the sealing plate 4 and can rotate around the connection point to scrape away impurities.

[0053] Gear 20 meshes with gear ring 12 to transmit power. A torsion spring is provided at the connection between arc blade 11 and sealing plate 4 to provide a reset force for arc blade 11. At the same time, when bolt 5 is tightened, since the rotating rod 10 on gear 20 is engaged with arc blade 11 and gear 20 is meshed with gear ring 12, it can prevent gear ring 12 from easily shaking as bolt 5 rotates. Gear ring 12 is provided with two sockets 21 for engaging so that gear ring 12 can rotate with bolt 5. The protruding part of rotating rod 10 is engaged with arc blade 11, which can drive arc blade 11 to rotate synchronously.

[0054] Two connecting rods 13 are slidably connected to the bolt 5, and can slide along the axial direction of the bolt 5. One end of the connecting rod 13 is fixedly connected to a push block 18. Pressing the push block 18 drives the connecting rod 13 to move. A spring 22 is fixedly connected between the push block 18 and the bolt 5 to provide a restoring force for the push block 18 and the connecting rod 13. The spring 22 is sleeved on the connecting rod 13 to limit the installation position of the spring 22 and prevent displacement.

[0055] In this embodiment, the bolt 5 is loosened to expose the plug 17. Then, the push block 18 is pressed to drive the connecting rod 13 into the socket 21. At the same time, the bolt 5 is continuously turned back and forth, which drives the gear ring 12 to rotate. The gear ring 12 drives the gear 20 and the rotating rod 10 to rotate. During the rotation, the arc blade 11, which is engaged with the rotating rod 10, scrapes off the welding slag and impurities of the nylon gasket 6 on the sealing surface, avoiding problems such as poor sealing and medium leakage during high-pressure testing caused by impurities. At the same time, it can scrape off the damaged nylon gasket 6. After the damaged nylon gasket 6 is scraped off, the plug 17 is rotated by turning the knob 9, which causes the pressure ring 15 on the threaded surface 16 to press the nylon gasket 6 downward and slide it, so that the new nylon gasket 6 is exposed on the sealing plate 4. The replacement is completed, avoiding the cumbersome operation of disassembling the entire device in the traditional way, reducing replacement time and improving maintenance efficiency.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A back-embedded, post-welded end sealing device, characterized in that, Includes workpiece (1), sealing assembly, overload assembly, and replacement assembly; The sealing assembly is installed at the weld end opening of the workpiece (1). The weld end opening of the workpiece (1) has a protrusion. The workpiece (1) is provided with a sealing plate (4). The sealing plate (4) is provided with a plug (17). The plug (17) is provided with an O-ring (7). A nylon gasket (6) is slidably connected inside the sealing plate (4). The sealing assembly is used to seal the weld end face of the workpiece (1); The overload component is used to warn and remind the workpiece (1) that the internal pressure is too high; The replacement component is used to periodically replace the nylon gasket (6) to ensure the sealing of the weld end of the workpiece (1).

2. The back-embedded, post-welded end sealing device according to claim 1, characterized in that, The sealing assembly includes two semi-circular retaining rings (3), two bolts (5) and a retaining ring (2). The retaining ring (2) is fitted onto the workpiece (1). The two semi-circular retaining rings (3) are respectively disposed inside the retaining ring (2). The bolts (5) are slidably connected to the retaining ring (2) and the sealing plate (4).

3. The back-embedded post-weld end sealing device according to claim 2, characterized in that, The overload assembly includes two rotating rods (10), two contact sensors (14), and an alarm (8). The two rotating rods (10) are slidably connected inside the sealing plate (4), the two contact sensors (14) are fixedly installed on two semi-circular retaining rings (3), and the alarm (8) is fixedly installed on the sealing plate (4).

4. The back-embedded post-weld end sealing device according to claim 1, characterized in that, The replacement component includes a knob (9), a threaded surface (16), and a pressure ring (15). The threaded surface (16) is disposed on the plug (17), the pressure ring (15) is slidably connected to the threaded surface (16), and the knob (9) is rotatably connected to the sealing plate (4).

5. A back-embedded, post-welded end sealing device according to claim 3, characterized in that, The retaining ring (2) is provided with a slot, and the two semi-circular retaining rings (3) are respectively engaged in the slot of the retaining ring (2). The two semi-circular retaining rings (3) are tightly attached to the workpiece (1) by bolts (5). The weld end opening has a protrusion. The bolts (5) are provided with a circular groove (19). The two bolts (5) are respectively provided with a residue cleaning component.

6. A back-embedded, post-welded end sealing device according to claim 3, characterized in that, One end of each of the two rotating rods (10) is in contact with two contact sensors (14), and the contact sensors (14) send a signal to the control system to make the alarm (8) sound an alarm.

7. A back-embedded, post-pull-welded end sealing device according to claim 4, characterized in that, The knob (9) is fixedly connected to the plug (17), and one end of the nylon washer (6) is attached to the welding end face of the workpiece (1), and the other end is attached to the pressure ring (15).

8. A back-embedded, post-welded end sealing device according to claim 5, characterized in that, The residue removal assembly includes two arc blades (11), a gear ring (12), and a gear (20). The gear (20) is fixedly connected to the rotating rod (10), the gear (20) is slidably connected in the circular groove (19), the gear ring (12) is rotatably connected in the circular groove (19), and the arc blades (11) are rotatably connected in the sealing plate (4).

9. A back-embedded, post-welded end sealing device according to claim 8, characterized in that, The gear (20) meshes with the gear ring (12), and a torsion spring is provided at the connection between the arc blade (11) and the sealing plate (4). The gear ring (12) has two insertion ports (21), and the protruding part of the rotating rod (10) is engaged with the arc blade (11).

10. A back-embedded, post-welded end sealing device according to claim 2, characterized in that, Two connecting rods (13) are slidably connected to the bolt (5). One end of the connecting rod (13) is fixedly connected to a pressing block (18). A spring (22) is fixedly connected between the pressing block (18) and the bolt (5). The spring (22) is sleeved on the connecting rod (13).

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