CN104033651A - Installation device for underground pipeline and corresponding method - Google Patents

Abstract

An apparatus (1) for installing a pipeline (2) comprising mutually nested pipes (14) in a trench (4) excavated in the ground (6, 6a, 6 b), characterized in that the apparatus (1) comprises at least a first movable assembly (20) for travelling substantially in the longitudinal direction (L) of the trench (4), the first movable assembly (20) comprising at least: -guide means (34 b, 34 d) of said first movable assembly (20) along said duct (4); -a first transverse support (36) for pushing the pipe (2) along a direction (T) substantially parallel to the ground (6) and substantially perpendicular to the longitudinal direction (L), the first transverse support (36) being intended to move longitudinally forward along the pipe (2) so as to gradually move the portion of the pipe (2) outside the trench (4) in front of the first movable assembly (20) above the trench (4).

Description

Installation device for underground pipeline and corresponding method

technical field

The present invention relates to an apparatus for installing a pipeline comprising successively nested pipes in a trench dug in the ground.

The invention also relates to a corresponding method.

Background technique

The invention is particularly applicable to distribution pipes for drinking water or purified water, said pipes comprising, for example, ductile iron pipes with inner and outer coatings nested within each other. Each of these tubes includes a plain end and a nested end for receiving the plain end of another tube. A gasket will ensure the seal between the flat end and the nested end, and can comprise the fixing part of the two tubes.

Two tubes thus nested may form an angle to each other, the maximum allowable angle being about 8 degrees for the best performing tubes.

Pipelines can also include valves that connect two adjacent pipes.

In order to lay the pipeline in the ground, a trench is usually dug with the aid of an excavator, and the pipes are successively nested into one another at the bottom of the trench. The pipe trench should be wide enough, generally not less than 40cm, so that the operator can enter it to complete the nesting.

This means that a large amount of earth is taken out of the ground to form the trench, which creates a large amount of earth, which is then backfilled to close the trench. Additionally, the technique of the operator entering and working in the trench is dangerous to the operator. In order to avoid accidents, all personnel on the pipeline laying site need to maintain a high degree of vigilance.

Contents of the invention

It is an object of the present invention to provide a device for installing the pipe in a trench which at the same time makes the installation more efficient, safer for the operator and less costly.

To this end, the object of the present invention is a device of the aforementioned type, comprising at least a first movable assembly for advancing in the longitudinal direction of the trench, the first movable assembly comprising at least:

- guide elements of the first movable assembly along the trench;

- a first transverse support for pushing the pipe in a direction substantially parallel to the ground and substantially perpendicular to the longitudinal direction, the first transverse support for moving longitudinally forward along the pipe so that the pipe's The part outside the trench and located in front of the first movable assembly gradually moves above the trench.

According to some specific embodiments, the device may include one or more of the following features alone or in any technically possible combination:

- the first movable assembly comprises a first vertical support for supporting a part of the pipeline moving via said first transverse support, the first vertical support being adapted to move together with the first transverse support;

- the first movable assembly includes a second transverse support for being located laterally on the other side of the duct with respect to the first transverse support and opposite to the direction of travel of the first movable assembly Staggered vertically;

- the first movable assembly includes a base, and the base includes at least two guide mechanisms for facing the laterally opposite inner walls on both sides of the trench and the ground, respectively, so that the travel of the first movable assembly is substantially longitudinal movement;

- the device comprises a tractor for pulling the first movable assembly, and a coupling mechanism for connecting the first movable assembly with the tractor, the tractor being in particular capable of creusering trenches;

- the pipe has a given length, the connection point of the connecting mechanism to the pulling machine is 2 to 3.5 times the distance from the first movable assembly on the longitudinal projection, and the distance to the first movable assembly is preferably substantially equal to the given length 2 times the fixed length;

- the device comprises a second movable assembly for traveling longitudinally in unison with and longitudinally behind the first movable assembly, the second movable assembly comprising a second vertical support, the second vertical supports positioned at an intermediate depth of the trench to vertically support the pipe to gradually accompany the pipe lowering into said trench;

- the second movable assembly includes a second base, the base includes at least two guide mechanisms, and the at least two guide mechanisms are respectively used to face the two transversely opposite inner walls of the trench and the ground, so that the travel of the second movable assembly is substantially along the vertical movement;

- the pipe has a given length, the distance of the second vertical support from the first vertical support in longitudinal projection being greater than half the given length;

- the connection means for connecting the first movable assembly to the tractor comprises at least one metal chain;

- The device comprises at least one metal chain for connecting the second movable assembly to the first movable assembly and/or the tractor.

Furthermore, the present invention relates to a method of installing a pipeline in a trench excavated underground, the method comprising the steps of:

a) digging the pipe trench longitudinally;

b) A part of the pipeline is formed through the sequential nesting of the pipes, and the part of the pipeline is placed outside the trench;

c) advancing a first movable assembly substantially longitudinally towards the portion of the pipeline, said first movable assembly comprising:

- guide elements of the first movable assembly along the trench;

- a first transverse support for pushing the pipe in a transverse direction substantially parallel to the ground and substantially perpendicular to the longitudinal direction, the first transverse support moving longitudinally forward along the pipe so that the portion of the pipe is Gradually move over the ditch.

Description of drawings

The invention will be further explained by the following description, given by way of example only, with reference to the accompanying drawings.

Fig. 1 generally shows the top view of device of the present invention;

Figure 2 generally shows a side view of the device of Figure 1 substantially parallel to the ground;

Fig. 3 is the enlarged view of the part of Fig. 1 concentrated on the first movable assembly and the second movable assembly;

Figure 4 is an enlarged view of the part of Figure 2 focused on the first movable assembly and the second movable assembly;

Figure 5 schematically illustrates a perspective view of a first movable assembly of the apparatus shown in Figures 1-4;

Figure 6 schematically illustrates a perspective view of a second movable assembly of the apparatus shown in Figures 1-4;

Detailed ways

A device 1 for installing a pipeline 2 in a trench 4 excavated in substantially level ground 6 is described with reference to FIGS. 1-4 .

The trench 4 extends substantially in the longitudinal direction L. As shown in FIG. At the same time, a transverse direction T and a vertical direction V which are substantially horizontal and substantially perpendicular to the longitudinal direction L are defined.

The longitudinal direction L is taken as the direction of travel of the device 1 , indicated by the arrow F in FIGS. 1-4 . When viewed along the longitudinal direction while traveling, the transverse direction T faces to the right. The longitudinal V faces downward.

In this example the ground 6 is horizontal. The ground 6 includes a surface 6a on one side of the trench 4 and a surface 6b along the transverse direction T on the other side of the trench 4 . Before being installed in the trench 5, the pipe 2 is first placed, for example, on the surface 6a.

For example, the trench 4 is almost straight, and its cross section is approximately rectangular.

For example, the trench 4 comprises two laterally opposite vertical inner walls 8 , 10 and a bottom 12 connecting the two vertical inner walls 8 , 10 ( FIGS. 5 , 6 ).

For example, the width of the pipe trench 4 along the transverse direction T is at least 28 cm, and the depth along the vertical direction V is about 100 cm above the upper generatrix of the pipe 2 . For example, the trench 4 extends longitudinally for several hundreds of meters.

Optionally, the trench 4 can be slightly curved.

The duct 2 comprises tubes 14 nested within each other.

Optionally, conduit 2 may include valves. Each valve is located between two successive pipes 14 .

The tubes 14 are preferably constructed of ductile iron and preferably include an inner protective layer and/or an outer protective layer. Preferably, the tubes 14 are all of the same length L0 ( FIG. 1 ) (eg, about 6 meters). For example, the tube 14 has a nested end with an outer diameter of between 75mm and 200mm.

Preferably, each tube 14 includes a first end, ie a flat end, and a second end opposite the first end, ie a nesting end for nesting the flat ends of adjacent tubes 14 . Preferably, the nesting end is located longitudinally on the travel side of the device 1 .

According to a variant, the nested pipes consist wholly or partly of fixing means (for example, pins embedded in the sealing ring between the flat end and the nested end, and internally provided with snap locks inside the flat end. tooth.

The device 1 comprises a first mobile assembly 20 intended to travel substantially longitudinally along the trench 4 . Preferably, the device 1 further includes a tractor 22 and a connecting mechanism 24 , the tractor 22 is used for pulling the first movable assembly 20 along the pipe ditch 4 , and the connecting mechanism 24 is used for connecting the tractor 22 and the first movable assembly 20 . The device 1 also includes a second movable assembly 25 and a second connecting mechanism 26. The second movable assembly 25 is located longitudinally behind the first movable assembly 20, that is, on the opposite side to the direction of travel of the first movable assembly 20. The second connecting mechanism 26 is used to The second movable component 25 is connected with the first movable component 20 .

According to a variant that is not shown, the first mobile assembly 20 is automatic, ie has its own part that runs along the trench 14 . Then tractor 22 has no effect.

According to another variant, the pulling machine 22 is replaced by another mechanism capable of moving the first mobile assembly 20 . For example, the mechanism is laterally opposed to the first movable assembly 20 or located longitudinally behind the first movable assembly 20 .

According to another variant, a connection mechanism 26 is able to link the second mobile assembly 25 to the traction machine 22 .

Preferably, the connection mechanism 24 and/or the connection mechanism 26 comprises at least one metal chain.

For example, tractor 22 is a crawler machine. The puller 22 is located above the trench 4 (eg, across the trench 4 as shown in FIG. 1 ). Preferably, the tractor 22 is a bucket excavator with a towing hitch 27 of the coupling mechanism 24 . The machinery described works after the trencher (not shown) has passed.

According to another embodiment, the pulling machine 22 can excavate the pipe trench 4 by itself while pulling the first movable assembly 20 .

The tractor 22 includes a base 28 . Preferably, the distance L1 from the hook 27 to the first movable assembly 20 in the projection of the longitudinal direction L is 2 to 3.5 times the length L0 of the pipe 14, preferably, the distance to the first movable assembly 20 is equal to 2 times the length L0.

The first movable assembly 20 ( FIGS. 3 , 4 , 5 ) includes a base 34 , a first lateral support 36 and a first vertical support 38 , the base 34 is mounted on wheels 30 a , 30 b , 30 c , 30 d and rests against the trench 4, on both sides, the first horizontal support 36 is used to push the pipe 2 (not shown in FIG. Ground support pipe 2. The first movable assembly 20 also includes a second transverse support 40, the position and function of which will be described later.

The base 34 comprises a first part 34a, a second part 34c and a bridge 34e. The first part 34a is substantially parallel to the first surface 6a of the ground and is extended by a vertical flank 34b about 10 mm from the inner wall 8 of the trench 4. The second part 34c is connected to the bridge 34e. The second surface 6b of the ground is substantially parallel and is extended by vertical flanks 34d approximately 10mm from the wall 10 of the trench 4, a bridge 34e extending transversely between the first part 34a and the second part 34c. The base 34 consists of a polytetrachloroethylene A substantially horizontal support plate 34f for supporting the pipe 2 is formed.

The support plate 34f is fixed on the bridge 34e. The support plate 34f is located substantially in the middle along the transverse direction T of the bridge 34e.

The two wheels 30a, 30b are longitudinally staggered. They are fastened to the first part 34a and rest on the ground surface 6a. Two corresponding wheels 30c, 30d are secured to the second part 34c and rest on the ground surface 6b. In addition, the wheels 30a, 30b, 30c, 30d are fixed in a detachable manner, and can be adjusted in height to suit different venues. The lateral extension of the wheels 30a, 30b, 30c, 30d can also be adjusted to accommodate pipe trenches 4 of different widths.

The flanks 34b and 34d form a guide mechanism for the first movable assembly 20 such that the travel of the first movable assembly 20 is substantially a movement in the longitudinal direction L.

Preferably, the transverse extension of the bridge 34e is adjustable so that the base 34 can be adapted to trenches 4 of different widths.

For example, the first lateral support 36 is located substantially above the ground 6 . The first transverse support 36 is located in front of the first movable assembly 20 and on the side of the trench 4 where the pipeline 2 to be laid is initially located. For example, the first transverse support 36 comprises at least one wheel rotatably mounted on an axle and partly protruding above the trench 4, said axle being fixed substantially vertically on the first part 34a. The points of contact between the wheels and the pipe 2 form lateral support points.

For example, the first vertical support 38 is located in front of the bridge 34e, and protrudes upwards relative to the bridge 34e, so that when the pipeline 2 passes on the first vertical support 38, it is slightly lifted, so as to limit the earthwork in the trench and Facilitates passage of the bridge 34e. For example, the first vertical support 38 includes at least one wheel rotatably mounted on an axle extending substantially transversely between the base wings 34b and 34d.

For example, the second transverse support 40 is located substantially above the ground 6 and is preferably longitudinally offset a distance D rearward relative to the first transverse support 36 ( FIGS. 3 , 4 ). For example, the distance D is between 30cm and 40cm.

For example, the second transverse support 40 comprises at least one wheel rotatably mounted on an axle and partly protruding above the trench 4, said axle being fixed substantially vertically on the second part 34c.

Preferably, the first transverse support 36 and the second transverse support 40 are fixable at different transverse positions to accommodate different diameters of the pipe 14 .

The metal chains of the connecting mechanism 24 are fishing net chains. It passes from the hook 27 or, alternatively, from the hitch ring of the tractor 22 . One end of the metal chain is fixed on the vertical wing 34b, and the other end is fixed on the vertical wing 34d.

The second movable assembly 25 ( FIGS. 3 , 4 , 6 ) is used to move substantially longitudinally along the trench 4 in unison with the first movable assembly 20 . The second movable assembly 25 includes a base 42 and a second vertical support 44, the base 42 is installed on the wheels 32a, 32b, 32c, 32d on the ground 6 on each side of the trench 4, and the second vertical support 44 Used to support the pipeline 2 vertically (not shown in Figure 6 for ease of reading).

In the example shown, the base 42 is substantially similar to the base 34 of the first movable assembly 20 . Accordingly, the base 42 includes a first portion 42a for the vertical side 42b and a second portion 42c for the vertical side 42d, respectively compatible with the parts 34a-34d of the base 34 of the first movable assembly 20. similar.

Bridges 42e-42f connect the two parts 42a and 42c. The bridges 42e-42f include a lower branch 42e and an upper branch 42f, the lower branch 42e being U-shaped protruding downward.

Both ends of the lower branch 42e and the upper branch 42f comprise substantially horizontal portions towards the outside of the bridges 42e-42f and secured to the first part 42a and the second part 42c, respectively.

The lateral extension of the lower branch 42e is adjustable, so that the base 42 can adapt to pipe trenches 4 of different widths.

Preferably, the upper branch 42f is U-shaped protruding upwards, so that the valve can pass through when the pipeline to be laid has a valve.

According to a variant not shown, the upper branch 42f is straight.

For example, the second movable assembly 25 is connected to the first movable assembly 20 by at least two metal chains 26, wherein one metal chain is fixed to the first part 42a and the first part 34a, and the other metal chain is fixed to the second part 42c and the first part 34a. on the second part 34c.

For example, the second vertical support 44 is similar in structure to the first vertical support 38 of the first movable assembly 20 . However, the second vertical support 44 is lower in the vertical direction V than the first vertical support 38 . For example, the second vertical support 44 is located at a depth of approximately 300 mm from the ground 6 in the vertical direction. For example, the second vertical support 44 comprises at least one wheel rotatably mounted on an axle, preferably substantially transversely mounted on the lower branch 42e.

The distance L2 ( FIGS. 1 , 2 ) of the second vertical support 44 from the first vertical support 38 in the longitudinal L projection is greater than half the length L0 , in particular the distance L2 is about 4 m.

The mutual position of the upper branch 42f and the second vertical support 44 is such that the duct 2 can pass between them, preferably without touching the upper branch 42f.

The operation of the device 1 is described here in the "fixed" state, that is to say when the part of the pipe 2 behind the device 1 has been installed in the bottom 12 of the trench 4, the device 1 is advanced so as to place the part initially located in the device 1 The part of the pipe 2 before 1 is gradually installed into the pipe trench 4.

The trencher excavates the pipe trench 4 on the ground 6 . The tractor 22 pulls the first movable assembly 20 during the forward process, and the first movable assembly 20 is connected to the second movable assembly 25 ( FIGS. 1 and 2 ). The tractor 22 , the first movable assembly 20 and the second movable assembly 25 move substantially in the longitudinal direction L in unison. The first movable assembly 20 passes through the side wings 34b and 34d, while the second movable assembly 25 moves along the trench 4 through the side wings 42b and 42d.

The pipes 14 are nested into each other before the puller 22 outside the trench 4 to form the pipe 2 . The pipe 14 is placed in the transverse direction T on the ground 6 between the pipe trench 4 and the crawlers of the tractor 22 .

The first lateral support 36 substantially pushes the pipe 2 laterally so that the pipe 2 behind the first movable assembly 20 is located above the trench 4 and gradually descends towards the bottom 12 .

In top view ( FIG. 1 ), the duct 2 between the tractor 22 and the first movable assembly 20 preferably has a section comprising about two consecutive pipes 14 . In this example, the angle between two successive tubes 14 is less than or equal to approximately 6 degrees.

Furthermore, the first vertical support 38 preferably supports the pipe 2 substantially above the ground 6 so as to prevent the pipe 14 from entraining earthwork in the pipe trench 4 . Pipeline 2 then passes over bridge 34e. The pipe 2 slides on the support plate 34f. PTFE The support plate reduces the friction of the pipeline 2 as it passes over the first movable assembly 20, thereby inhibiting the risk of damage to the pipeline 2, especially its outer protective layer. The pipe 2 is then lowered into the trench 4 .

Preferably, the second vertical support 44 ( FIGS. 3 , 4 ) provides an intermediate vertical support between the first vertical support 38 and the bottom 12 for better control of the two successive vertical supports during the descent of the pipeline 2 . The angle formed by the pipe 14 in the vertical plane. The duct 2 passes between the second vertical support 44 and the upper branch 42f of the bridges 42e-42f.

Preferably, the second lateral support 40 counteracts the restriction of lateral movement of the pipe 2 imposed by the first lateral support 36 , thus facilitating the alignment of the pipe 2 with the trench 4 .

By changing the lengths of the connecting mechanisms 24 and 26, the length L1 between the fixed point of the first movable assembly 20 and the connecting mechanism 24 on the tractor 22 and the distance between the first vertical support 38 and the second vertical support 44 can be adjusted. Adjust the length L2 between them.

Therefore, by means of the above-mentioned device 1, especially the first movable assembly 20 and its lateral support 36, the pipeline 2 can be gradually installed in the pipe trench 4, and the pipes are nested outside the pipe trench and kept nested during installation. . The installation does not require the operator to enter the trench 4, the trench can then be narrower. And excavation of the trench produces less earthwork, so less material is required to backfill the trench. Thus, the installation of the pipe 2 is more efficient and less dangerous to the operator. Due to the simple structure, the cost of the device 1 is lower.

The first vertical support 38 slightly lifts the pipe 2 to limit the pipe 2 from driving the earth on the side of the pipe ditch 4 .

The optional second transverse support 40 improves the position control of the pipe 2 before it is lowered and in particular ensures the alignment of the pipe 2 above the trench 4 .

The optional second movable assembly 25 improves the control of the descent of the pipe 2 to the bottom 12 of the trench 4 .

Optionally, the tractor 22 can also excavate the pipe trench 4, which simplifies the installation process of the pipe 2.

Claims (10)

1. a device (1), described device (1) is arranged on the pipeline (2) that comprises mutually nested pipe (14) in the pipe trench (4) underground (6,6a, 6b) excavating, it is characterized in that, described device (1) at least comprises first movable component (20) of advancing along longitudinal (L) of described pipe trench (4) for substantially, and described the first movable component (20) at least comprises:

The guide element along described pipe trench (4) (34b, 34d) of-described the first movable component (20);

The-the first cross-brace thing (36), for the direction (T) along substantially parallel with ground (6) and substantially vertical with longitudinal (L), promote described pipeline (2), described the first cross-brace thing (36), for vertically moving forward along described pipeline (2), moves on described pipe trench (4) described the first movable component (20) part before that is positioned at outside described pipe trench (4) of described pipeline (2) gradually.

2. device according to claim 1 (1), it is characterized in that, described the first movable component (20) comprises the first vertical supporter (38), the described first vertical supporter (38) is for supporting the part via the mobile described pipeline (2) of described the first cross-brace thing (36), and the described first vertical supporter (38) for moving together with described the first cross-brace thing (36).

3. device according to claim 1 and 2 (1), it is characterized in that, described the first movable component (20) comprises the second cross-brace thing (40), described the second cross-brace thing (40) is laterally positioned at the opposite side of described pipeline (2) with respect to described the first cross-brace thing (36), and longitudinally staggers with the first cross-brace thing (36) on the opposite direction of advancing with the first movable component (20).

4. according to the device (1) described in any one in claim 1-3, it is characterized in that, described the first movable component (20) comprises base (34), described base (34) comprises at least two guiding mechanisms (34a-34d), described at least two guiding mechanisms (34a-34d) for respectively with the both sides of described pipe trench (4) laterally oppose inwall (8,10) and ground (6a-6b) relative so that advancing of described the first movable component (20) is essentially longitudinally the movement of (L).

5. according to the device (1) described in any one in claim 1-4, it is characterized in that, described device (1) comprises tractor (22) and bindiny mechanism (24), described tractor (22) is for drawing described the first movable component (20), described bindiny mechanism (24) is for making the first movable component (20) be connected with tractor (22), and described tractor (22) can excavate described pipe trench (4) especially.

6. device according to claim 5 (1), it is characterized in that, described pipe (14) has given length (L0), it is 2 to 3.5 times of given length (L0) that described bindiny mechanism (24) is connected to tie point on described tractor (22) distance (L1) to described the first movable component (20) in longitudinal (L) projection, and to the distance of described the first movable component (20), preferably substantially equals 2 times of given length (L0).

7. according to the device (1) described in any one in claim 1-6, it is characterized in that, described device (1) comprises the second movable component (25), described the second movable component (25) for described the first movable component (20) longitudinally as one man (L) advance and be longitudinally positioned at described the first movable component (20) afterwards, described the second movable component (25) comprises the second vertical supporter (44), the described second vertical supporter (44) is positioned at the intermediate depth place of described pipe trench (4), to support described pipeline (2) to follow gradually described pipe (14) to drop in described pipe trench (4) along vertical (V).

8. device according to claim 7 (1), it is characterized in that, described the second movable component (25) comprises the second base (42), described base (42) comprises at least two guiding mechanisms (42a-42d), described at least two guiding mechanisms (42a-42d), for relative with two inwalls (8,10) and ground (6a-6b) that laterally oppose of described pipe trench (4) respectively, make advancing of described the second movable component (25) be essentially longitudinally the movement of (L).

9. according to the device described in claim 7 or 8 (1), it is characterized in that, described pipe (14) has given length (L0), and the described second vertical supporter (44) is greater than half of given length (L0) to the distance (L2) of the described first vertical supporter (38) in longitudinal (L) projection.

10. a method, described method for pipeline (2) being arranged on to the pipe trench (4) excavating in underground (6), is characterized in that, said method comprising the steps of:

A) longitudinally (L) excavates described pipe trench (4);

B) pass through a part for the described pipeline of mutually nested formation successively (2) of pipe (14), the described part of described pipeline (2) is placed on outside described pipe trench (4);

C) make the first movable component (20) substantially longitudinally (L) to the described part of described pipeline (2), advance, described the first movable component (20) comprising:

The guide element along described pipe trench (4) (34b, 34d) of-described the first movable component (20);

The-the first cross-brace thing (36), described the first cross-brace thing (36) promotes described pipeline (2) for horizontal (T) along substantially parallel with ground (6) and substantially vertical with longitudinal (L), described the first cross-brace thing (36) vertically moves forward along described pipeline (2), and the described part of described pipeline (2) is moved gradually on described pipe trench (4).