Inner pipe supporting device

Abstract

The utility model relates to an inner pipe supporting device, and belongs to the technical field of ship power propulsion devices. The supporting device comprises a supporting seat, an upper half body and a lower half body, the upper half body and the lower half body are symmetrical in structure and are both of a semicircular structure. The outer sides of the circumferences of the upper half body and the lower half body are respectively provided with at least one supporting seat; the front end surfaces and the rear end surfaces of the supporting seats are respectively flush with the front end surfaces and the rear end surfaces of the corresponding upper half body and the lower half body; the upper half body and the lower half body clamp the inner pipe in a vertically symmetrical mode. On the premise that a welding process is not used and the structural strength of the pipe is not damaged, the inner pipe is supported in the outer pipe, and the oil pipe supporting device is particularly suitable for supporting oil pipes of controllable-pitch propellers with large vibration loads such as icebreakers.

Description

Technical Field

[0001] The utility model relates to the technical field of ship power propulsion devices, and particularly relates to an inner pipe support device. Background Art

[0002] There are various types of inner oil pipe support devices for controllable pitch propeller shafts abroad, including support bar structures, support ring structures, three support seat structures, four support seat structures, etc. Most of the support devices are fixed to the inner oil pipe of the shaft by welding. Due to the simple structure of the inner oil pipe support device for the controllable pitch propeller shaft, the failure rate is relatively high. For example, when a controllable pitch propeller ship is in a navigation condition, under the action of the rotating blade torque pulsating force and various vibration factors, various welding defects are generated at the welding parts of the long oil pipeline, resulting in a reduction in the structural strength of the long oil pipeline, and there are relatively large reliability hidden dangers, among which the influence during the icebreaking condition of an icebreaker is the most prominent.

[0003] With the increasing use of high-power controllable pitch propeller ships, serious failures such as oil pipe fractures have occurred at the welded joints between the inner oil pipe support device of the controllable pitch propeller shaft and the oil pipe. At present, the reliability design of the inner oil pipe support device has gradually been taken seriously. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the above-mentioned prior art, the utility model provides an inner pipe support device, which realizes the support of the inner pipe in the outer pipe without using welding technology and without damaging the structural strength of the pipe, and is particularly suitable for use in supporting the oil pipe of a controllable pitch propeller with a large vibration load such as an icebreaker.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An inner pipe support device, the support device includes a support seat, an upper half body, and a lower half body; the upper half body and the lower half body have symmetrical structures and are both semi-circular structures; at least one support seat is respectively installed on the outer circumferences of the upper half body and the lower half body, and the front and rear end faces of the support seat are flush with the front and rear end faces of the corresponding upper half body and lower half body; the upper half body and the lower half body symmetrically clamp the inner pipe from above and below.

[0007] Further, the support device further includes a sliding copper bar; the sliding copper bar is fixed to the upper end of the support seat.

[0008] Further, the support seat has a plurality of weight-reducing holes distributed at intervals.

[0009] Further, the support seat is a strip structure, and the support seat is welded to the inner pipe along the axial direction of the inner pipe.

[0010] Further, the bottom end of the support base is an arc-shaped bottom end, and the arc-shaped bottom end matches the circumferential outer arc of the upper half body and the lower half body.

[0011] Further, the left and right sides of the support base respectively have arc-shaped transition sections, and the upper and lower parts on the left and right sides of the support base are connected by the arc-shaped transition sections.

[0012] Further, both ends of the upper half body and the lower half body are connecting ends that horizontally protrude outward, and the upper half body and the lower half body are bolt-connected through the connecting ends.

[0013] Further, a plurality of bolt through holes that penetrate up and down are evenly distributed at intervals on the connecting end of the upper half body, and a plurality of threaded holes that penetrate up and down are evenly distributed at intervals on the connecting end of the lower half body. The bolt through holes and the threaded holes are coaxially aligned up and down; the hexagon socket head cap screws pass through the bolt through holes and are screwed into the threaded holes to connect the upper half body and the lower half body.

[0014] Further, after the hexagon socket head cap screws are tightened, the bottom ends extend out of the threaded holes and are threadedly connected with fastening nuts.

[0015] Further, the top ends of adjacent hexagon socket head cap screws and adjacent fastening nuts are respectively connected by bolt locking strips.

[0016] Advantages of the present utility model:

[0017] For the inner pipe support device of the present utility model, a half clamp structure is adopted to clamp the inner pipe without using a welding process. Under the condition of not damaging the structural strength of the pipe, the support of the inner pipe inside the outer pipe is realized, and the damage to the inner pipe strength caused by welding defects is eliminated. The present utility model is not only applicable to the support of the inner oil pipe of various controllable pitch propeller shafts, but also particularly applicable to the support of the inner oil pipe of controllable pitch propellers with large vibration loads such as high-power controllable pitch propellers and icebreakers.

[0018] By installing fastening nuts, the present utility model not only strengthens the fastening connection between the upper half body and the lower half body, but also plays a role in counterweight for the balance of the support device.

[0019] By welding bolt locking strips, the present utility model performs anti-loosening treatment on all hexagon socket head cap screws.

[0020] A plurality of weight-reducing holes are evenly distributed on the support base of the present utility model to reduce the weight of the support base and reduce the driving force required for the axial reciprocating movement of the inner pipe inside the outer pipe. Description of the drawings

[0021] Figure 1 is a structural schematic diagram of the inner pipe support device of the present utility model;

[0022] Figure 2Schematic diagram of the half body structure in the present utility model;

[0023] Figure 3 Schematic diagram of the support seat and sliding copper bar structures in the present utility model.

[0024] Wherein: 1 - inner tube, 2 - support seat, 2.1 - weight reduction hole, 3 - upper half body, 3.1 - bolt through hole, 4 - lower half body, 4.1 - threaded through hole, 5 - sliding copper bar, 6 - bolt locking strip, 7 - hexagon socket head bolt, 8 - fastening nut, 9 - outer tube. Specific embodiments

[0025] The following combines the description of the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are only used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0026] The terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. in this application document are based on the orientation or position relationship shown in the drawings. If the drawings are different, the corresponding position relationship may also change accordingly. Therefore, it should not be understood as a limitation of the protection scope.

[0027] In the present utility model, the terms "installation", "connection", "engagement", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or a connection that can communicate with each other, a direct connection, an indirect connection through an intermediate medium, a connection inside two components, or an interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] This embodiment records an inner tube support device, which is fastened to the inner tube by a half structure, without welding, and can be applied to the support of the inner oil pipe of various controllable pitch propeller ships, especially suitable for the use of controllable pitch propellers of icebreakers.

[0029] As Figure 1 shown, the inner tube 1 is coaxially placed in the outer tube 9 through this support device. This support device includes a support seat 2, an upper half body 3, a lower half body 4, a sliding copper bar 5, a bolt locking strip group 6, a hexagon socket head bolt 7 and a fastening nut 8.

[0030] The upper half body 3 and the lower half body 4 are symmetrically placed on the upper and lower parts of the inner tube 1. As Figure 2As shown, the upper half body 3 and the lower half body 4 have symmetrical structures, each being a semi-circular structure. The two ends of the semi-circular structure are respectively horizontally protruding connecting ends outward. And on the connecting end of the upper half body 3, a plurality of bolt through holes 3.1 penetrating up and down are evenly distributed at intervals. On the connecting end of the lower half body 4, a plurality of threaded holes 4.1 penetrating up and down and matching with the bolt through holes 3.1 are evenly distributed at intervals. The bolt through holes 3.1 and the threaded holes 4.1 are coaxially aligned up and down. The hexagon socket head cap bolt 7 passes through the bolt through hole 3.1 and is screwed into the threaded hole 4.1 to connect the upper half body 3 and the lower half body 4 and clamp the inner pipe 1. After the hexagon socket head cap bolt 7 of this embodiment is tightened, the bottom end extends out of the threaded hole 4.1 and is threadedly connected with the fastening nut 8. The fastening nut 8 can not only further strengthen the fastening connection between the upper half body 3 and the lower half body 4, but also play a counterweight role in the balance of the support device. The number and specifications of the fastening nuts 8 can be adjusted according to the working conditions requirements.

[0031] The top ends of adjacent hexagon socket head cap bolts 7 and adjacent fastening nuts 8 are respectively connected by welding bolt locking strips 6 to perform anti-loosening treatment on all the hexagon socket head cap bolts 7.

[0032] On the circumferential outer sides of the upper half body 3 and the lower half body 4, at least one support seat 2 is respectively welded. In this embodiment, taking the example of symmetrically welding two support seats 2 for illustration, the number of support seats 2 can be determined according to the specific specifications of the support device, and the front and rear ends of the support seats 2 are respectively flush with the front and rear ends of the corresponding upper half body 3 and lower half body 4. The two support seats 2 on the upper half body 3, the two support seats 2 on the lower half body 4, and the support seats 2 on the upper half body 3 and the support seats 2 on the lower half body 4 are respectively centrosymmetric with respect to the center of the inner pipe 1 to stably support the inner pipe 1 coaxially placed in the outer pipe 9. As Figure 3 shown, the support seat 2 of this embodiment is a strip-shaped structure with an arc-shaped bottom end. The support seat 2 is arranged along the axial direction of the inner pipe 1, and its arc-shaped bottom end matches the outer side surface radian of the upper half body 3 and the lower half body 4, which is convenient for the support seat 2 to be reliably and stably fixed on the upper half body 3 and the lower half body 4. And both the left and right sides of the strip-shaped structure have arc-shaped transition sections. The upper and lower parts of the left and right sides of the support seat 2 are connected by the arc-shaped transition sections, which can not only avoid stress concentration, but also ensure the stable support of the support seat 2. In addition, a plurality of weight-reducing holes 2.1 are evenly distributed at intervals in the middle of the support seat 2 to reduce the weight of the support seat 2.

[0033] Sliding copper strips 5 are respectively welded on the upper ends of the four support seats 2. The support seat 2 contacts the inner wall of the outer pipe 9 through the sliding copper strips 5, plays a role in supporting the inner pipe 1, and ensures the axial reciprocating movement of the inner pipe 1 in the outer pipe 9. Through the sliding copper strips 5, the support strength of the support device in the outer pipe 9 can be improved, and it is corrosion-resistant and not easy to rust, which can enable the support device to maintain a good sliding contact state with the outer pipe 9 for a long time and is beneficial to extending the service life of this pipe structure.

[0034] The inner tube support device of this embodiment is applicable to structures where the inner tube needs to reciprocate. For example, the inner oil pipe of the adjustable pitch propeller shaft is coaxially placed inside the large shaft through the support device, enabling the inner oil pipe to reciprocate axially inside the large shaft 9.

[0035] Although the principle of the present invention has been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations of the illustrative implementation modes of the present invention and do not limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple replacements based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. An inner tube support device, characterized in that: The support device comprises a support seat (2), an upper half body (3), and a lower half body (4); the upper half body (3) and the lower half body (4) are symmetrical in structure and are both semicircular structures; at least one support seat (2) is respectively installed on the outer circumference of the upper half body (3) and the lower half body (4), and the front and rear end surfaces of the support seat (2) are respectively flush with the corresponding front and rear end surfaces of the upper half body (3) and the lower half body (4); the upper half body (3) and the lower half body (4) clamp the inner tube symmetrically up and down.

2. The inner tube support device according to claim 1, characterized in that: The support device also includes a sliding copper bar (5); the sliding copper bar (5) is fixed to the upper end of the support seat (2).

3. The inner tube support device according to claim 1, characterized in that: The support seat (2) is provided with a plurality of weight-reducing holes (2.1) distributed at intervals.

4. The inner tube support device according to claim 1, characterized in that: The support seat (2) is a strip-shaped structure, and the support seat (2) is welded to the inner tube (1) along the axial direction of the inner tube (1).

5. The inner tube support device according to claim 1, characterized in that: The bottom end of the support seat (2) is an arc-shaped bottom end, and the arc-shaped bottom end matches the circumferential outer curvature of the upper half body (3) and the lower half body (4).

6. The inner tube support device according to claim 1, characterized in that: The left and right sides of the support seat (2) are respectively provided with arc-shaped transition sections, and the upper part and the bottom part of the left and right sides of the support seat (2) are connected via the arc-shaped transition sections.

7. The inner tube support device according to claim 1, characterized in that: Both ends of the upper half body (3) and the lower half body (4) are connecting ends that protrude horizontally outwards, and the upper half body (3) and the lower half body (4) are connected to each other via the connecting end bolts.

8. The inner tube support device according to claim 7, characterized in that: A plurality of bolt through holes (3.1) extending vertically are evenly spaced on the connection end of the upper half body (3), and a plurality of threaded holes (4.1) extending vertically are evenly spaced on the connection end of the lower half body (4), wherein the bolt through holes (3.1) and the threaded holes (4.1) are coaxially aligned vertically; a hexagon socket bolt (7) passes through the bolt through holes (3.1) and is screwed into the threaded holes (4.1) to connect the upper half body (3) and the lower half body (4).

9. The inner tube support device according to claim 8, characterized in that: After the hexagon socket bolt (7) is tightened, the bottom end extends out of the threaded hole (4.1) and is threadedly connected to the fastening nut (8).

10. The inner tube support device according to claim 9, characterized in that: The top ends of adjacent hexagon socket bolts (7) and adjacent fastening nuts (8) are respectively connected via bolt anti-loosening strips (6).

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