Sliding clamping device intended to compensate for a lack of concentricity between a pipe and a passage opening of a clamping block.

Abstract

- Sliding clamping device intended to compensate for a lack of concentricity between a pipe and a passage opening of a clamping block.- The device (1) is intended to be arranged between a clamping block (2) and a cylindrical pipe (3) having an axis of revolution (A1), the clamping block (2) comprising a cylindrical opening (4) having an axis of revolution (A2), the cylindrical pipe (3) being intended to pass through the clamping block (2) through the cylindrical opening (4), the axis of revolution (A1) and the axis of revolution (A2) being intended to be separated by an offset (D1), the device (1) comprising a hollow cylinder (5) comprising a cylindrical portion (C1, C2, C3) having an internal surface (6) having an axis of revolution (A3) and an external surface (7) having an axis of revolution (A4), the axis of revolution (A3) and the axis of revolution (A4) being separated by a predetermined offset (D2), the offset (D2) being included in a predetermined offset range comprising the offset (D1). Figure for abstract: Fig.1.

Description

Title of the invention: Sliding clamping device intended to compensate for a lack of concentricity between a pipe and a passage opening of a clamping block. Technical field

[0001] The present invention relates to a sliding clamping device intended to compensate for an offset between a pipe and a clamping block. State of the art

[0002] Hydraulic system installations are particularly sensitive installations, especially in environments subject to strong vibrations. These installations comprise pipes (or hoses) which are held using clamping blocks. The clamping block comprises two parts, each having at least one semi-cylindrical half-shell. The semi-cylindrical half-shell of one part of a clamping block forms a passage opening for a pipe or hose with the semi-cylindrical half-shell of the other part of the clamping block. The assembly of the two parts of the clamping block makes it possible to clamp the pipes and hoses through the clamping block through the passage openings formed by the semi-cylindrical half-shells of the two parts of the clamping block. Teflon rings are generally installed around the pipes at the passage openings.The pipes are thus well maintained in environments with strong vibrations.

[0003] However, it is difficult to ensure correct concentricity between the pipe and the passage opening. This lack of correct concentricity can lead to wear between, on the one hand, the Teflon ring and the pipe and, on the other hand, the clamping block.

[0004] There are no solutions to overcome this drawback. Statement of the invention

[0005] The object of the present invention is to propose a sliding clamping device intended to compensate for a lack of concentricity between a pipe and a passage opening of a clamping block.

[0006] For this, it relates to a sliding clamping device intended to be arranged between a clamping block and a cylindrical pipe having a first axis of revolution, the clamping block comprising at least one cylindrical opening having a second axis of revolution, the cylindrical pipe being intended to pass through the clamping block through the cylindrical opening, the clamping block having at least two parts, the cylindrical opening being formed by two semi-cylindrical half-shells comprised respectively by one of the two parts of the clamping block, the sliding clamping device being intended to be arranged at least partly between the cylindrical opening and the cylindrical pipe, the first axis of revolution being intended to be parallel to the second axis of revolution (A2), the first axis of revolution and the second axis of revolution being intended to be separated by a first offset.

[0007] According to the invention, the sliding clamping device comprises a hollow cylinder comprising at least one cylindrical portion, the at least one cylindrical portion having an internal cylindrical surface having a third axis of revolution and an external cylindrical surface having a fourth axis of revolution, the third axis of revolution being intended to be substantially coincident with the first axis of revolution when the sliding clamping device is arranged between the clamping block and the cylindrical pipe, the third axis of revolution being parallel to the fourth axis of revolution, the third axis of revolution and the fourth axis of revolution being separated by a second predetermined offset, the second offset being within a predetermined offset range including the first offset, the external cylindrical surface having a cross-section strictly less than a cross-section of the cylindrical opening so that the cylindrical portion can slide through the clamping block in the cylindrical opening, the internal cylindrical surface having a cross-section substantially equal to a cross-section of the cylindrical conduit.

[0008] Thus, thanks to the second offset between the axis of revolution of the external surface of the cylindrical portion and the axis of revolution of the internal surface of the cylindrical portion, the first offset between the axes of revolution of the cylindrical pipe and the cylindrical opening can be compensated. The wear between the clamping block and the cylindrical pipe can be reduced due to the compensation, or even the elimination of the concentricity deviations between the clamping block and the cylindrical pipe.

[0009] In addition, the hollow cylinder comprises a plurality of cylindrical portions, the inner cylindrical surface of one cylindrical portion extending the inner cylindrical surface of an adjacent cylindrical portion, each of the at least one cylindrical portion having a second predetermined offset different from the second predetermined offset of another cylindrical portion.

[0010] Preferably, the hollow cylinder comprises a first hollow half-cylinder and a second hollow half-cylinder removably assembled to form the hollow cylinder.

[0011] In addition, the outer cylindrical surface of each at least one cylindrical portion comprises at least one circular shoulder at at least one end of each at less a cylindrical portion.

[0012] Furthermore, each at least one cylindrical portion has a length intended to be strictly greater than a thickness of the clamping block.

[0013] Advantageously, the external cylindrical surface of at least one cylindrical portion comprises a gripping projection intended to be gripped by a tool to turn the hollow cylinder around the third axis of revolution.

[0014] Furthermore, the internal cylindrical surface of each at least one cylindrical portion comprises anti-slip elements intended to prevent sliding of the cylindrical pipe in the hollow cylinder.

[0015] In addition, the external cylindrical surface of at least one cylindrical portion comprises a groove intended to receive a clamping collar for assembling the first hollow half-cylinder and the second hollow half-cylinder.

[0016] The invention also relates to a method of mounting a cylindrical pipe through a cylindrical opening of a clamping block with a sliding clamping device as specified above.

[0017] According to the invention, the method comprises the following steps: - a step of estimating the first offset; - a step of choosing a cylindrical portion having a second predetermined offset included in a predetermined offset range including the first offset; - a step of separating the two parts of the clamping block; - a step of placing the cylindrical pipe through the sliding clamping device and the clamping block in the cylindrical opening of the clamping block at the level of the chosen cylindrical portion; - a step of assembling the two parts of the clamping block by clamping the sliding clamping device around the cylindrical pipe.

[0018] In addition, the setting up step includes the following sub-steps: - a sub-step of placing the first hollow half-cylinder on the cylindrical pipe; - a sub-step of placing the second hollow half-cylinder on the cylindrical pipe to enclose the cylindrical pipe between the first hollow half-cylinder and the second hollow half-cylinder; - a sub-step of assembling the first part of the clamping block and the second part of the clamping block so that the first part and the second part grip the sliding clamping device, the sliding clamping device being gripped at the level of the cylindrical portion chosen in the semi-cylindrical half-shells.

[0019] Further, the sub-step of placing the second hollow half-cylinder is followed of a sub-step of assembling the first hollow half-cylinder and the second hollow half-cylinder using a clamping collar received in the groove of a cylindrical portion of the sliding clamping device.

[0020] Furthermore, the sub-step of placing the second hollow half-cylinder on the cylindrical pipe or the sub-step of assembling the first part of the clamping block and the second part of the clamping block is followed by a sub-step of aligning the sliding clamping device using a tool, the tool gripping the gripping projection in order to turn the hollow cylinder around the third axis of revolution until the fourth axis of revolution is substantially coincident with the second axis of revolution. Brief description of the figures

[0021] The attached figures will make it clear how the invention can be implemented. In these figures, identical references designate similar elements.

[0022] [Fig.l] shows a perspective view of a cylindrical pipe clamped in a clamping block using a sliding clamping device.

[0023] [Fig.2] shows a perspective view of a sliding clamping device placed on part of a clamping block.

[0024] [Fig. 3] shows a longitudinal section of a clamping block and a pipe clamped in a sliding clamping device according to a first embodiment.

[0025] [Fig.4A] represents a longitudinal section of the sliding clamping device according to the first embodiment.

[0026] [Fig.4B] represents a longitudinal section of a cylindrical portion having a second predetermined offset equal to zero.

[0027] [Fig.4C] represents a longitudinal section of a cylindrical portion having a second non-zero predetermined offset.

[0028] [Fig.4D] represents a longitudinal section of a cylindrical portion having a second non-zero predetermined offset greater than the second predetermined offset of [Fig.4C].

[0029] [Fig.5] represents: - a drawing (A) illustrating a longitudinal section of a clamping block and a cylindrical pipe passing through the clamping block through a cylindrical opening, the positions of the cylindrical pipe in the cylindrical opening making it possible to estimate the first offset; - a drawing (B) illustrating a longitudinal section of a clamping block, a sliding clamping device and a cylindrical conduit passing through the clamping block through a cylindrical opening; - a drawing (C) illustrating a longitudinal section of a sliding clamping device according to the second embodiment, the sliding clamping device having a cylindrical portion having a second predetermined offset included in an offset range including the first offset estimated from the drawing (A); - a drawing (D) illustrating a longitudinal section of a sliding clamping device according to the first embodiment, the sliding clamping device having one of the cylindrical portions having a second predetermined offset included in an offset range including the first offset estimated from the drawing (A).

[0030] [Fig.6] schematically represents the method of mounting a cy pipe lindrique through a cylindrical opening of a clamping block with a sliding clamping device. Detailed description

[0031] The sliding clamp device 1 is shown in [Fig. 1]. The sliding clamp device 1 is intended to be arranged between a clamp block 2 and a cylindrical pipe 3 having an axis of revolution AL.

[0032] The clamping block 2 comprises at least one cylindrical opening 4 having an axis of revolution A2. The cylindrical pipe 3 is intended to pass through the clamping block 2 through the cylindrical opening 4.

[0033] The clamping block 2 has at least two parts PI, P2. The cylindrical opening 4 is formed by two semi-cylindrical half-shells E1, E2 comprised respectively by one of the two parts PI, P2 of the clamping block 2.

[0034] The sliding clamping device 1 is intended to be arranged at least partly between the cylindrical opening 4 and the cylindrical pipe 3. In other words, the sliding clamping device 1 surrounds the cylindrical pipe 3 by enclosing it and the clamping block 2 surrounds the sliding clamping device 1.

[0035] The axis of revolution Al is intended to be parallel to the axis of revolution A2. The axis of revolution Al and the axis of revolution A2 are intended to be separated by an offset DI ( [Fig.5]). Preferably, the offset is greater than or equal to zero.

[0036] The sliding clamping device 1 comprises a hollow cylinder 5 comprising at least one cylindrical portion C1, C2, C3.

[0037] The at least one cylindrical portion C1, C2, C3 have an internal cylindrical surface 6 having an axis of revolution A3 and an external cylindrical surface 7 having an axis of revolution A4 ([Fig.4A], [Fig.4B], [Fig.4C], [Fig.4D]).

[0038] The axis of revolution A3 is intended to be substantially coincident with the axis of revolution A1 when the sliding clamping device 1 is arranged between the clamping block 2 and the cylindrical pipe 3.

[0039] The axis of revolution A3 is parallel to the axis of revolution A4. The axis of revolution A3 and the axis of revolution A4 are separated by a predetermined offset D2. Preferably, the offset D2 is greater than or equal to zero.

[0040] The second predetermined offset D2 is within a predetermined offset range including the offset D1. Thus, even if the offset D2 is not exactly equal to the offset D1, the cylindrical portion C1, C2, C3 can still be used between the cylindrical conduit 3 and the cylindrical opening 4 of the clamping block 2. The predetermined offset range depends on the difference tolerance between the offset D1 and the offset D2.

[0041] The external cylindrical surface 7 has a cross-section strictly smaller than a cross-section of the cylindrical opening 4 so that the cylindrical portion C1, C2, C3 can slide through the clamping block 2 in the cylindrical opening 4. In other words, the cross-section of the external cylindrical surface 7 has a diameter strictly smaller than the diameter of the cross-section of the cylindrical opening 4.

[0042] The internal cylindrical surface 6 has a cross-section substantially equal to a cross-section of the cylindrical pipe 3. Thus, the cylindrical pipe 3 is prevented from sliding in the sliding clamping device 1.

[0043] According to a first embodiment, the hollow cylinder 5 may comprise a plurality of cylindrical portions C1, C2, C3. The internal cylindrical surface 6 of a cylindrical portion C1, C2, C3 extends the internal cylindrical surface 6 of an adjacent cylindrical portion C1, C2, C3. The plurality of cylindrical portions C1, C2, C3 are in one piece. Each of the at least one cylindrical portion C1, C2, C3 has a predetermined offset D2 different from the predetermined offset D2 of another cylindrical portion C1, C2, C3.

[0044] [Fig.2], [Fig.3], [Fig.4A] and [Fig.5] (D) show a sliding clamping device 1 having a hollow cylinder 5 comprising three cylindrical portions C1, C2, C3. In these figures, the hollow cylinder 5 comprises a cylindrical portion C1 having an offset D2 greater than the predetermined offset D2 of the cylindrical portion C3. In the middle of the cylindrical portions C1 and C3, the hollow cylinder 5 comprises a cylindrical portion C2 having an offset D2 equal to zero.

[0045] According to a second embodiment, each cylindrical portion C1, C2, C3 are separated from each other. [Fig.4B], [Fig.4C] and [Fig.4D] each represent a different cylindrical portion C1, C2, C3 separated from each other. [Fig.4C] represents a cylindrical portion C1 having a predetermined offset D2 greater than the predetermined offset D2 of the cylindrical portion C3 shown in [Fig.4D]. [Fig.4B] represents a cylindrical portion C2 having a predetermined offset D2 equal to zero.

[0046] In a preferred embodiment, the hollow cylinder 5 comprises a first half- hollow cylinder 51 and a second hollow half-cylinder 52 removably assembled to form the hollow cylinder 5 ([Fig.l] and [Fig.2]).

[0047] Furthermore, the external cylindrical surface 7 of each at least one cylindrical portion C1, C2, C3 may comprise at least one circular shoulder 8 at at least one end 9 of each at least one cylindrical portion C1, C2, C3. Preferably, the at least one circular shoulder 8 is located between the cylindrical portions C1, C2, C3.

[0048] In addition, each at least one cylindrical portion C1, C2, C3 may have a length L1 intended to be strictly greater than a thickness L2 of the clamping block 2 ([Fig. 3]). In addition, each at least one cylindrical portion C1, C2, C3 may have an outside diameter intended to be strictly less than an inside diameter of the cylindrical opening 4. Thus, the sliding clamping device 1 can slide in the cylindrical opening 4 at the level of the chosen cylindrical portion C1, C2, C3. The circular shoulders 8 limit the sliding of the sliding clamping device 1 so that the chosen cylindrical portion C1, C2, C3 remains in the cylindrical opening 4.

[0049] Advantageously, the external cylindrical surface 7 of at least one cylindrical portion C2 comprises a gripping projection 10 intended to be gripped by a tool to turn the hollow cylinder 5 around the axis of revolution A3. Thus, it is possible to align the offset D2 with the offset D1.

[0050] In addition, the internal cylindrical surface 6 of each at least one cylindrical portion C1, C2, C3 may comprise anti-slip elements 11 intended to prevent sliding of the cylindrical pipe 3 in the hollow cylinder 5. Thus, the sliding takes place between the external cylindrical surface 7 and the clamping block 2. As shown in [Fig.2], the anti-slip elements 11 may be strips made of gripping material, such as Teflon, fixed on the internal cylindrical surface 6 parallel to the axis of revolution A3.

[0051] Furthermore, the external cylindrical surface 7 of at least one cylindrical portion C1, C2, C3 comprises a groove 12 intended to receive a clamping collar for assembling the first hollow half-cylinder 51 and the second hollow half-cylinder 52. The clamping collar may be a metal clamping collar or one made of plastic.

[0052] The invention also relates to a method for mounting a cylindrical pipe 3 through a cylindrical opening 4 of a clamping block 2 with the sliding clamping device 1 ([Fig.6]).

[0053] The method comprises the following steps: - an SI step of estimating the offset Dl; - a step S2 of choosing a cylindrical portion C1, C2, C3 having a predetermined offset D2 included in a predetermined offset range comprising the DI offset; - a step S3 of separation of the two parts PI, P2 of the clamping block 2; - a step S4 of placing the cylindrical pipe 3 through the sliding clamping device 1 and the clamping block 2 in the cylindrical opening 4 of the clamping block 2 at the level of the chosen cylindrical portion C1, C2, C3; - a step S5 of assembling the two parts PI, P2 of the clamping block 2 by clamping the sliding clamping device 1 around the cylindrical pipe 3.

[0054] Step SI can be carried out by an operator who estimates the deviations e and E shown in drawing (A) of [Fig.5]. From the difference in these deviations, he can choose the cylindrical portion C1, C2 or C3.

[0055] The drawing (C) of [Fig.5] represents a cylindrical portion C1 according to the second embodiment of the sliding clamping device 1 whose predetermined offset D2 is included in a predetermined offset range including the offset DI.

[0056] The drawing (D) of [Fig.5] represents a hollow cylinder 5 comprising three cylindrical portions C1, C2, C3 in one piece according to the first embodiment of the sliding clamping device 1. It is the cylindrical portion C1 which is chosen because the predetermined offset D2 is included in a predetermined offset range including the offset DI.

[0057] The implementation step S4 may comprise the following sub-steps: - a sub-step S40 of placing the first hollow half-cylinder 51 on the cylindrical pipe 3; - a sub-step S41 of placing the second hollow half-cylinder 52 on the cylindrical pipe 3 to enclose the cylindrical pipe 3 between the first hollow half-cylinder 51 and the second hollow half-cylinder 52; - a sub-step S44 of assembling the first part PI of the clamping block 2 and the second part P2 of the clamping block 2 so that the first part PI and the second part P2 grip the sliding clamping device 1, the sliding clamping device 1 being gripped at the level of the cylindrical portion C1, C2, C3 chosen from the semi-cylindrical half-shells E1, E2.

[0058] The sub-step S41 of placing the second hollow half-cylinder 52 may be followed by a sub-step S42 of assembling the first hollow half-cylinder 51 and the second hollow half-cylinder 52 using a clamping collar received in the groove 12 of a cylindrical portion C1, C2, C3 of the sliding clamping device 1.

[0059] The sub-step S41 of placing the second hollow half-cylinder 52 on the cylindrical pipe 3 or the sub-step S44 of assembling the first part PI of the clamping block 2 and the second part P2 of the clamping block 2 may be followed by a sub-step S45 of aligning the sliding clamping device 1 using a tool. In this sub-step S45, the tool grips the gripping projection 10 in order to turn the hollow cylinder 5 around the axis of revolution A3 until the axis of revolution A4 is substantially coincident with the axis of revolution A2.

[0060] Sub-step S44 may be preceded by a sub-step S43 of installing a sleeve 13 in the cylindrical opening 4 of the clamping block 2. The sleeve 13 may be configured to facilitate the sliding of the sliding clamping device 1 in the cylindrical opening 4.

Claims

Claims

1. Sliding clamping device intended to be arranged between a clamping block (2) and a cylindrical pipe (3) having a first axis of revolution (A1), the clamping block (2) comprising at least one cylindrical opening (4) having a second axis of revolution (A2), the cylindrical pipe (3) being intended to pass through the clamping block (2) through the cylindrical opening (4), the clamping block (2) having at least two parts (PI, P2), the cylindrical opening (4) being formed by two semi-cylindrical half-shells (E1, E2) comprised respectively by one of the two parts (PI, P2) of the clamping block (2), the sliding clamping device (1) being intended to be arranged at least partly between the cylindrical opening (4) and the cylindrical pipe (3), the first axis of revolution (A1) being intended to be parallel to the second axis of revolution (A2),the first axis of revolution (A1) and the second axis of revolution (A2) being intended to be separated by a first offset (D1), characterized in that it comprises a hollow cylinder (5) comprising at least one cylindrical portion (C1, C2, C3), the at least one cylindrical portion (C1, C2, C3) having an internal cylindrical surface (6) having a third axis of revolution (A3) and an external cylindrical surface (7) having a fourth axis of revolution (A4), the third axis of revolution (A3) being intended to be substantially coincident with the first axis of revolution (A1) when the sliding clamping device (1) is arranged between the clamping block (2) and the cylindrical pipe (3), the third axis of revolution (A3) being parallel to the fourth axis of revolution (A4), the third axis of revolution (A3) and the fourth axis of revolution (A4) being separated by a second predetermined offset (D2),the second offset (D2) being within a predetermined offset range including the first offset (D1), the external cylindrical surface (7) having a cross-section strictly smaller than a cross-section of the cylindrical opening (4) so ​​that the cylindrical portion (C1, C2, C3) can slide through the clamping block (2) in the cylindrical opening (4), the internal cylindrical surface (6) having a cross-section, substantially equal to a cross-section of the cylindrical pipe (3).

2. Device according to claim 1, characterized in that the hollow cylinder (5) comprises a plurality of cylindrical portions (Cl, C2, C3), the internal cylindrical surface (6) of a cylindrical portion (Cl, C2, C3) extending the internal cylindrical surface (6) of an adjacent cylindrical portion (Cl, C2, C3), each of the at least one cylindrical portion (Cl, C2, C3) having a second predetermined offset (D2) different from the second predetermined offset (D2) of another cylindrical portion (Cl, C2, C3).

3. Device according to one of claims 1 and 2, characterized in that the hollow cylinder (5) comprises a first hollow half-cylinder (51) and a second hollow half-cylinder (52) removably assembled to form the hollow cylinder (5).

4. Device according to one of claims 1 to 3, characterized in that the external cylindrical surface (7) of each at least one cylindrical portion (Cl, C2, C3) comprises at least one circular shoulder (8) at at least one end (9) of each at least one cylindrical portion (Cl, C2, C3).

5. Device according to one of claims 1 to 4, characterized in that each at least one cylindrical portion (C1, C2, C3) has a length (L1) intended to be strictly greater than a thickness (L2) of the clamping block (2).

6. Device according to one of claims 1 to 5, characterized in that the external cylindrical surface (7) of at least one cylindrical portion (C2) comprises a gripping projection (10) intended to be gripped by a tool to turn the hollow cylinder (5) around the third axis of revolution (A3).

7. Device according to one of claims 1 to 6, characterized in that the internal cylindrical surface (6) of each at least one cylindrical portion (C1, C2, C3) comprises anti-slip elements (11) intended to prevent sliding of the cylindrical pipe (3) in the hollow cylinder (5).

8. Device according to claim 3 to 7, characterized in that the external cylindrical surface (7) of at least one cylindrical portion (C1, C2, C3) comprises a groove (12) intended to receive a clamping collar for assembling the first half-cylinder

9.

10. hollow (51) and the second hollow half-cylinder (52). Method of mounting a cylindrical pipe (3) through a cylindrical opening (4) of a clamping block (2) with a sliding clamping device (1) according to one of claims 1 to 8, characterized in that it comprises the following steps: a step (SI) of estimating the first offset (Dl); a step (S2) of choosing a cylindrical portion (C1, C2, C3) having a second predetermined offset (D2) included in a predetermined offset range including the first offset (D1); a step (S3) of separating the two parts (PI, P2) of the clamping block (2); a step (S4) of placing the cylindrical pipe (3) through the sliding clamping device (1) and the clamping block (2) in the cylindrical opening (4) of the clamping block (2) at the selected cylindrical portion (Cl, C2, C3); a step (S5) of assembling the two parts (PI, P2) of the clamping block (2) by clamping the sliding clamping device (1) around the cylindrical pipe (3). Method according to claim 9, characterized in that the installation step (S4) comprises the following sub-steps: a sub-step (S40) of placing the first hollow half-cylinder (51) on the cylindrical pipe (3); a sub-step (S41) of placing the second hollow half-cylinder (52) on the cylindrical pipe (3) to clamp the cylindrical pipe (3) between the first hollow half-cylinder (51) and the second hollow half-cylinder (52); a sub-step (S43) of assembling the first part (PI) of the clamping block (2) and the second part (P2) of the clamping block (2) so that the first part (PI) and the second part (P2) clamp the sliding clamping device (1), the sliding clamping device (1) being clamped at the cylindrical portion (Cl, C2, C3) chosen from the semi-cylindrical half-shells (El, E2).

11. Method according to claim 10, characterized in that the sub-step (S41) of placing the second hollow half-cylinder (52) is followed by a sub-step (S42) of assembling the first hollow half-cylinder (51) and the second hollow half-cylinder (52) using a clamping collar received in the groove (12) of a cylindrical portion (C1, C2, C3) of the sliding clamping device (1).

12. Method according to one of claims 10 and 11, characterized in that the sub-step (S41) of placing the second hollow half-cylinder (52) on the cylindrical pipe (3) or the sub-step (S43) of assembling the first part (PI) of the clamping block (2) and the second part (P2) of the clamping block (2) is followed by a sub-step (S44) of aligning the sliding clamping device (1) using a tool, the tool gripping the gripping projection (10) in order to turn the hollow cylinder (5) around the third axis of revolution (A3) until the fourth axis of revolution (A4) is substantially coincident with the second axis of revolution (A2).

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