KR101052995B1 - Pipe line-up clamp - Google Patents

Abstract

PURPOSE: A clamping device for the lineup of pipes is provided to simplify an installation structure by elevating a rod when an inclined block is slid. CONSTITUTION: A clamping device for the lineup of pipes comprises a pair of guide rings(10), rods(20), push blocks(30), an fixed shaft, sliding blocks(50), inclined blocks, multiple backup rings(60), and a drive device(70). Multiple through holes are formed in the guide rings. The rods are installed in the through holes. The push blocks are installed in one end of each rod. The fixed shaft is fixed to the center of the guide rings. The sliding blocks are installed in both ends of the fixed shaft. The inclined blocks are connected to the other ends of the rods and elevate the rods. The backup rings are installed between the guide rings. The drive device slides the sliding blocks.

Description

Pipelineup Clamping Device {PIPE LINE-UP CLAMP}

The present invention relates to a pipelineup clamping device, and more particularly, it is installed inside the pipe to be connected when welding one end of two adjacent pipes to each other by welding so that the end of the pipe is a round shape at the same time welding It relates to a pipelineup clamping device that allows a welded site to be supported.

Metal pipes used in oil pipes and the like are generally connected by butt welding. At this time, both ends of the pipes connected to each other should be rounded to facilitate welding, and leakage is not easily generated even after welding.

For this reason, when welding metal pipes for oil pipelines together, insert the pipe clamping device inside the pipes before pressing, and press the inner ends of the opposing pipes to the outside so that the cross section of the pipe ends becomes the circle. You will be doing a pipelineup work.

As an example of a pipeline lineup clamping device developed for this purpose, U.S. Patent No. 5,356,067 (Internal Lineup Clamp) is known, which is located inside both ends of the pipe adjacent to the butted portion of the pipe as shown in FIG. A pair of pipe clamps 110 and 120 positioned at each other, a backup ring 130 installed between the pair of pipe clamps 110 and 120, and the pipe clamps 110 and 120 may be elevated. And an air chamber 150 connected by the pipe clamps 110 and 120 and the link 140.

In the pipe clamp, the air chamber 150 slides forward and backward by compressed air, and the pipe clamps 110 and 120 connected by the link 140 are lifted up and down by this sliding movement. When the backup ring 130 is lifted in conjunction with the operation of 110 and 120, a pair of pipe clamps 110 and 120 are radially unfolded inside the pipe to press the inner surface of the pipe so that the cross-sectional shape of the pipe is increased. The epicenter will be achieved.

However, the technique described in the above document is connected to the air chamber 150 and the link 140 through which the pair of pipe clamps 110 and 120 slide, and the link 140 is composed of a plurality of link bars and pins. The structure is quite complicated, and not only takes a long time to assemble them, but also the force applied in the process of making the pipe clamps 110 and 120 adhere to the inner circumferential surface of the pipe to make the cross-sectional shape round. When delivered, the link bar or pin can easily break.

On the other hand, the backup ring 130 is to be located inside the pipe to support the bottom of the welding portion when welding the butt portion of the pipe from the outside of the pipe using an automatic welding machine, the backup ring of the document The 130 arranges a plurality of blocks in a radial manner so that the outer circumferential surface thereof forms a circle, and a filling block is provided between each block so that the filling blocks push the respective blocks to weld the backup ring 130. It extends along the bottom of the surface to be in close contact with the weld.

However, the structure of the backup ring 130 as described above is very complicated because a plurality of blocks and a plurality of filling blocks are inserted and fixed therebetween.

Moreover, since the upper surface of the backup ring 130 is in direct contact with the bottom of the welded portion, it is exposed to a considerably high heat during the welding operation, which causes the backup ring 130 to be easily deformed or damaged, and thus often the backup ring 130. There is a problem in that it takes a considerable time because the backup ring 130 of a complicated structure must be dismantled and / or replaced.

As another example of a pipe clamp, a pipe clamp of US Pat. No. 5,816,475 has also been proposed, which is a pair of clampings installed inside each of the two butted pipes 210 and 220 as shown in FIG. Shoe (230, 240) and the backup shoe 250 is provided between the pair of clamping shoes (230, 240), the clamping shoes (230, 240) comprises a cylinder device.

In addition, the backup shoe 250 has an arc shape having a plurality of predetermined lengths, and both ends thereof are formed of blocks each having an inclined surface, whereby the inclined surfaces of the backup shoes 250 are adjacent to the inclined surface of the backup shoe 250 adjacent thereto. Since it forms a circular ring while being interviewed with each other, there is an advantage in that it is simple in structure and can be uniformly supported over the entire bottom of the welded part. However, the backup shoe 250 must also be disassembled first for repair and replacement. Therefore, it has a problem that it takes a considerable time.

On the other hand, since the backup ring (backup shoe) supporting the bottom of the pipe welding part is exposed to a high temperature welding environment as it is, the upper surface of the backup ring may be easily deformed or damaged. Likewise, a material having a high heat resistance may be attached and used, for example, US Patent No. 5,110,031 (welding support ring for pipe).

The welding support ring disclosed in this document includes a plurality of backup rings 310 having grooves formed in the circumferential direction as shown in FIG. 1C, and a plurality of ceramic blocks 320 inserted into the grooves of the respective backup rings 310. It includes.

Although the ceramic is a material having high heat resistance, the ceramic may also be deformed or damaged when continuously exposed to a high temperature environment. Therefore, the ceramic block 320 should be easily exchanged as necessary.

However, in order to easily replace the ceramic block 320, the side of the backup ring 310 must be exposed so that the ceramic block 320 can be easily accessed. However, the backing ring 310 of the document has one outer circumferential surface even in a contracted state. Since the sides are not exposed by forming a circle, the ceramic block 320 cannot be easily exchanged. Therefore, in order to replace the ceramic block 320, the backup ring 310 is first dismantled as in the above-mentioned backing ring. It must take a lot of time.

Furthermore, since the ceramic block 320 is firmly coupled by a plurality of fastening members coupled to the side of the backup ring 310, first, the fastening members are released, and then the side of the backup ring 310 is opened. After replacing the ceramic block 320, there is a problem to go through the assembly process using the fastening members again.

The present invention has been made to solve the problems of the conventional pipe clamping device as described above, and the present invention does not use a link connection structure in lifting and lowering the pipe clamp, and also provides a ceramic block installed in the backup ring. The object is to provide an easy replaceable pipelineup clamping device.

An object of the present invention as described above is a pipeline up clamping device, a pair of guide rings radially formed with a plurality of through-holes; A rod installed in the through hole and being elevated; A push block installed at one end of the rod; A fixed shaft fixed to the center of the guide ring; A sliding block installed at both ends of the fixed shaft and sliding; An inclined block radially installed on an outer circumferential surface of the sliding block and connected to the other end of the rod to elevate the rod; A plurality of backup rings installed between the guide rings and interlocked with a lifting operation of the push block; It is achieved by including a drive device for sliding the sliding block.

The rod is a lifting pin which is installed in the guide ring and the lifting; It is installed on the lower end of the lifting pin, it may be implemented to include a fixed block which is elevated by sliding along the inclined block, the inclined block is provided on the upper surface of the inclined surface, and further provided with guide plates protruding on both sides and In addition, the rod may be guided by the guide plate to be lifted while being inclined sliding.

In addition, the backup ring of the present invention includes an arc-shaped ring block formed with an installation groove on the outer circumferential surface, and a ceramic block installed in the installation groove, and a guide surface is formed on the bottom surface of the ring block, by the guide surface. The ring block may be implemented to be rotated, the first end of the push block is provided with a fixing hole, one end is fixed to the fixing hole, the other end is coupled to one end of the backup ring; A second fixing pin fixed to the fixing hole; A link having one end fixed to the second fixing pin; A third fixing pin having one end connected to the other end of the link; A rotating plate having one end coupled to the other end of the third fixing pin, the other end of which is rotated in close contact with the bottom surface of the backup ring; It may be installed to pass through the rotating plate, both ends may include a fourth fixing pin which is fixed to the guide ring.

At this time, the other end of the rotating plate may be implemented to be provided with a roller that is rotated in interview with the backup ring.

According to the present invention, since the rod is raised and lowered as the inclined block is slid and moved, the installation structure is simple, and the inclined block and the inclined block are in close contact with the outer circumferential surface of the pipe even when a large force is applied while making the round shape of the pipe. The connection structure of the rod is relatively harder than the conventional link connection structure, so it is not easily broken.

Since one end of the radially installed backup ring is contracted downwardly, the side of the other end can be easily exposed to the outside, whereby it is very easy to replace the ceramic block because the ceramic block installed in the backup ring can be easily taken out.

Figures 1a, 1b, 1c is a cross-sectional view showing an example of a conventional pipe clamp,
2 is a perspective view showing an example of a pipelineup clamping device according to the present invention;
3 is an isolated perspective view of FIG. 2;
4 is a perspective view showing an example of a guide ring according to the present invention;
5 is an exploded perspective view showing an example of a rod and a push block according to the present invention;
Figure 6 (a, b) is a perspective view showing a fixed shaft and the connection ring and connecting plate according to the present invention,
7 is a perspective view showing an example of the sliding block and the inclined block according to the present invention;
Figure 8 (a, b) is an operating state showing the lifting of the rod according to the present invention,
Figure 9 (a) is an isolated perspective view showing an example of a backup ring according to the present invention,
Figure 9 (b) is a perspective view showing an example of combining the push block and the backup ring according to the present invention,
10 (a, b) and 11 (a, b) is an operating state showing the operation of the backup ring according to the present invention,
12 is a side view showing an example in which the pipelineup clamping device according to the present invention is installed in a pipe.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in more detail.

The present invention relates to a line-up clamping device for pipes so that the pipe cross-section of each of the welded portions when the two ends adjacent to each other to be connected to each other by welding the pipe end can be a circle, for this purpose the present invention As shown in FIG. 3, the guide ring 10, the rod 20, the push block 30, the fixed shaft 40, the sliding block 50, the inclined block 52, the backup ring 60, Drive device 70 is included.

The guide ring 10 is formed in a pair of circular rings at regular intervals, and as shown in FIG. 4, a plurality of through holes 11 are radially formed around the coupling ring, and coupling holes are formed at both sides thereof. (12) is formed. In this case, a rod 20 to be described later is installed in the through hole 11, and the fourth fixing pin P4 to be described later is coupled to the coupling hole 12.

The rod 20 is inserted into the through hole 11 of the guide ring 10 and is lifted by the sliding block 50 to be described later. The push block 30 to be described later is installed at one end and the inclined block is provided at the other end. 52 are installed to face each other.

In more detail, as shown in FIG. 5, the rod 20 is provided at the lower end of the elevating pin 21 and the elevating pin 21, which is inserted into the through hole 11 and is elevated. It consists of a fixed block 22 which is elevated while sliding along the inclined surface of the inclined block 52 to be described later.

In this case, the fixed block 22 is preferably provided with a plurality of upper and lower rollers 22A, 22B so as to slide smoothly along the inclined surface of the inclined block 52, wherein the upper roller 22A is at least two. The upper rollers 22A may be provided at different heights so as to correspond to the inclined surface of the inclined block 52 to be described later.

Push block 30 is fixed to the upper end of the rod 20, that is, the upper end of the lifting pin 21 is in close contact with the inner circumferential surface of the pipe, for this purpose the guide ring as shown in Figures 2 and 5 A plurality of radially is provided around the periphery of 10, and the upper surface is formed in the shape of an arc to correspond to the inner circumferential surface of the pipe.

The push block 30 is installed on the guide ring 10, respectively, one side of the push block 30 is connected to the connecting member for lifting the backup ring 60 to be described later, for this purpose to the push block 30 Two fixing holes 31 and 32 are formed at both ends of the side surface.

The connecting member has a first fixing pin (P1) is fixed to one end of the fixing hole 31 and the other end is coupled to one end of the backup ring 60 to be described later; A second fixing pin (P2) fixed to the fixing hole (32); A link 33 having one end fixed to the second fixing pin P2; A third fixing pin P3 having one end connected to the other end of the link 33; One end is coupled to the other end of the third fixing pin (P3), the other end is rotated in close contact with the bottom surface of the backup ring (60) to be described later and rotated; It is installed to penetrate through the rotating plate 34, the both ends includes a fourth fixing pin (P4) is fixed to the coupling hole 12 provided in the pair of guide ring (10).

The rotary plate 34 is a linear reciprocating motion is converted into a rotary motion by the lifting operation of the push block 30, for this purpose, the rotary plate 34 is formed in a "V" shape, each at its center and one end As the holes H1 and H2 are formed, the fourth fixing pin P4 penetrates through one side hole H1, and the link 33 is connected to the push block as the link 33 is connected to the other hole H2. By lifting and lowering 30, one end of the rotating plate 34 is pulled and rotated.

In this case, the other end of the rotating plate 34 on which the hole H2 is not formed may be further provided with a roller 34A which is interviewed and rotated on the bottom surface of the backup ring 60.

The fixed shaft 40 is a sliding block 50 to be described later is installed on both ends of the sliding configuration, as shown in Figure 3 is implemented as a cylindrical axis of symmetry, and also in Figure 6 (a, b) As shown in the drawing, there is further provided a disk-shaped connecting plate 41 and a ring-shaped blocking ring 42 provided on the outer circumferential surface of the connecting plate 41.

At this time, the connecting plate 41 may be formed with a plurality of ventilation holes (not shown) penetrating both sides, the ventilation hole is a low temperature to prevent the temperature inside the pipe rises to an excessively high temperature during welding When supplying the outside air into the pipe to allow the air to pass through the cooling direction in both sliding blocks 50 to prevent damage due to overheating of the devices.

In addition, both ends of the blocking ring 42 are welded to or coupled to the side surfaces of the pair of guide rings 10 through a fastening member, whereby the fixed shaft 40 and the guide ring 10 are mutually fixed. It is fixed. The blocking ring 42 blocks the inflow of foreign matter so that foreign matter falling into the pipe from the welded portion of the pipe is introduced into the operating part such as the fixed shaft 40 and the sliding block 50 described later, so as not to inhibit the operation.

Sliding block 50 is installed at both ends of the fixed shaft 40, respectively, is slid back and forth by the operation of the drive device 70 to be described later, the rod 20 is lifted by this sliding action as a result of the push As the block 30 is radially lifted and close to the inner circumferential surface of the pipe, the operation of the pipeline lineup clamping to make the inner circumferential surface of the pipe into a circle is made.

A plurality of mounting holes 51 are formed on the outer circumferential surface of the sliding block 50 to correspond to the installation position and the number of the rods 20, and the inclined block 52 described later is fixed to the mounting holes 51. do.

The inclined block 52 is installed and fixed to the sliding block 50, as shown in Figure 7, the upper surface is formed to be inclined upward toward the center from the end of the fixed shaft 40, the guide projecting to both sides on the upper surface The plate 52A is provided.

The bottom surface of the upper roller 22A provided on the fixing block 22 is seated on the upper surface of the guide plate 52A, and the upper surface of the lower roller 22B is in close contact with the bottom surface of the guide plate 52A. Due to this structure, as shown in FIG. 8 (a, b), the fixed block 22 is constrained and towed by the inclined block 52 so that the combined state is maintained without being separated from each other even during the lifting. As a result, the rod 20 is lifted in conjunction with sliding to the sliding block 50.

The backup ring 60 supports the welded bottom surfaces of the pipes adjacent to each other. The backup ring 60 is connected to each other through the push block 30 and the connection member so as to be linked to the lifting operation of the push block 30.

To this end, the backup ring 60 is provided with a plurality of ring blocks 61 are formed to be curved in an arc shape, the fastening hole into which the first fixing pin (P1) of the connecting member is inserted into the side of the ring block 61 61B is provided.

In addition, an arc-shaped curved guide surface 61A is formed on the bottom of the ring block 61 so that the free end can be lifted by the rotation of the rotating plate 34, and an installation groove 61C is formed around the ring block 61. ) Is formed and a ceramic block 62 made of a ceramic material is installed in the installation groove 61C.

The ceramic block 62 may be implemented in which one ceramic block 62 is installed in the ring block 61, or alternatively, a plurality of ceramic blocks may be installed in one ring block 61. May be

When a plurality of ceramic blocks are installed in one ring block 61 as described above, only a block that needs to be replaced may be partially replaced.

The driving device 70 is a device for sliding the sliding block 50 back and forth, and is implemented as a pneumatic device using a commonly used air compressor, or is implemented as a hydraulic cylinder to supply the hydraulic oil into the hydraulic cylinder The sliding block 50 may be implemented to slide back and forth.

The present invention constituted as described above slides the sliding block 50 installed at both ends of the fixed shaft 40 by supplying pneumatic or hydraulic oil from the driving device 70, wherein the present invention is a sliding block 50 The rod 20 is raised while being pulled in the direction of the driving device 70, and conversely, when the rod 20 is pushed in the direction opposite to the driving device 70, the rod 20 is lowered.

As the rod 20 is raised and lowered, the push block 30 installed at the upper end of the rod 20 is lifted and closely adhered to the inner circumferential surface of the pipe to make the cross-sectional shape of the pipe round, and at the same time, The backup ring 60 supports the bottom of the welded portion.

Hereinafter will be described in more detail through an embodiment according to the operation of the present invention.

<Examples>

As shown in FIG. 8 (a, b) as an embodiment of the present invention, when the sliding block 50 is slid in the direction of the driving device 70, the inclined block 52 provided on the outer circumferential surface is slid together, the inclination As the block 52 slides, the fixed block 22 of the rod 20 rises along the inclined surface.

At this time, the height A of the rod 20 is increased in proportion to the distance sliding on the inclined surface, the final height (A + B).

When the rod 20 rises as described above, the push block 30 installed at the top of the rod 20 rises, whereby the backup ring 60 connected to the push block 30 rises together. As shown in the figure, when the push block 30 rises, one end is connected by the first fixing pin P1 so that one end of the ring block 61 rises together, and at the same time, the push block 30 One end of the rotating plate 34 is pulled by the link 33 connected to the other end thereof, and the other end thereof is rotated oppositely. The rotating plate 34 is rotated along the guide surface 61A of the ring block 61. As shown in), the free end of the ring block 61 is raised while being rotated. Looking at the lifting operation as a whole it is operated in the state of Figure 11 (a) to 11 (b).

On the contrary, as the push block 30 is lowered, one end of the ring block 61 is lowered together, and at the same time, the link 33 is lowered to rotate the rotary plate 34 in the reverse direction, and the rotary plate 34 As the bottom support structure of the ring block 61 is released by), the free end is pushed down and folded by the other ring ring 61 adjacent to the ring block 61, which is folded down. It works in the state of.

When one end of the ring block 61 is pressed and lowered as described above, the side of the other end connected to the push block 30 is exposed to the outside. By this structure, the ceramic block 62 installed in the ring block 61 is mounted and detached. As a result, the ceramic block 62 may be simply replaced as necessary.

As described above, in the present invention, when both ends of two pipes 1 and 1 'adjacent to each other are connected to each other by welding, the pipes of both ends and adjacent parts may have a circular cross-sectional shape. The push block 30 is radially installed on the inner circumferential surface of (1, 1 ') so that the cross-sectional shape of the pipe becomes a circle so that the cross-sections of both ends also form a circle.

In addition, in conjunction with the operation of the push block 30, a backup ring 60 for supporting the bottom of the welded portion is installed, the push block 30 and the backup ring 60 is elevated by sliding by the inclined block 52. Because of the structure, the mechanical strength is relatively higher than that of the conventional link.

10: guide ring 11: through hole
12: coupling hole 20: rod
21: lifting pin 22: fixed block
22A: Upper roller 22B: Lower roller
30: pushblocks 31, 32; Fixing hole
33: Link 34: Carousel
34A: roller 40: fixed shaft
41: connecting plate 42: blocking ring
50: sliding block 51: mounting hole
52: inclined block 52A: guide plate
60: backup ring 61: ring block
61A: Guide surface 61B: Fastening hole
61C: Installation groove 62: Ceramic block
70: drive unit H1, H2: hole
P1: first fixing pin P2: second fixing pin
P3: third locking pin P4: fourth locking pin

Claims (6)

A pair of guide rings 10 in which a plurality of through holes 11 are formed radially;
A rod 20 installed in the through hole 11 and being elevated;
A push block 30 installed at one end of the rod 20;
A fixed shaft 40 fixed to the center of the guide ring 10;
A sliding block 50 installed at both ends of the fixed shaft 40 and sliding;
An inclined block 52 disposed radially on an outer circumferential surface of the sliding block 50 and connected to the other end of the rod 20 to elevate the rod 20;
A plurality of backup rings (60) installed between the guide rings (10) and linked with a lifting operation of the push block (30);
It includes a drive device for sliding the sliding block 50, 70,
The rod 20 is a lifting pin (21) which is installed on the guide ring (10) to elevate; Installed on the lower end of the lifting pin (21), the lineup clamping device for pipe welding, characterized in that it comprises a fixed block (22) is slid up and down along the inclined block (52).
delete The method according to claim 1,
The inclined block 52 is further provided with a guide plate (52A) is provided on the upper surface of the inclined surface, the rod 20 is guided by the guide plate (52A) is characterized in that it is lifted while inclined sliding. Lineup clamping device for pipe welding.
The method according to claim 1,
The backup ring 60 includes an arc-shaped ring block 61 in which an installation groove 61C is formed on an outer circumferential surface thereof, and a ceramic block 62 installed in the installation groove 61C.
Guide surface (61A) is formed on the bottom surface of the ring block (61), by the guide surface 61A lineup clamping device for pipe welding, characterized in that the free end is rotated by lifting.
The method according to claim 1,
Fixing holes 31 and 32 are provided at both ends of the push block 30,
A first fixing pin (P1) having one end fixed to the fixing hole (31) and the other end coupled to one end of the backup ring (60);
A second fixing pin (P2) fixed to the fixing hole (32);
A link 33 having one end fixed to the second fixing pin P2;
A third fixing pin P3 having one end connected to the other end of the link 33;
One end is coupled to the other end of the third fixing pin (P3), the other end is rotated in close contact with the bottom surface of the backup ring 60 and the rotating plate 34;
The lineup clamping device for pipe welding, which is installed to penetrate through the rotating plate (34), both ends of which includes a fourth fixing pin (P4) fixed to the guide ring (10).
The method according to claim 5,
The other end of the rotary plate (34) lineup clamping device for pipe welding, characterized in that the roller is provided with a roller 34A is interviewed and rotated.

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