Telescopic mechanism for crane pipe

Abstract

The telescopic mechanism comprises an upper crane pipe, a lower crane pipe, an elastic piece and a limiting cover, a telescopic groove is formed in the upper crane pipe; the lower crane pipe is telescopically connected with the upper crane pipe, and the lower crane pipe is clamped into the telescopic groove; the elastic piece is embedded in the telescopic groove, one end of the elastic piece abuts against the groove bottom of the telescopic groove, and the other end of the elastic piece abuts against the lower crane pipe. The limiting cover is fixedly connected with the upper crane pipe, a limiting hole is formed in the limiting cover, and the end, away from the upper crane pipe, of the lower crane pipe penetrates through the limiting hole and extends out of the limiting cover. Under the condition that the lower loading arm is not aligned with the filling opening, the lower loading arm can move upwards along the telescopic groove, so that the phenomenon that the lower loading arm is directly collided with the oil tank truck to be damaged can be avoided, the service life of the loading arm is effectively prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crane pipes, in particular to a telescopic mechanism for crane pipes. Background Art

[0002] Hoist pipes, also known as fluid loading and unloading arms, are specialized equipment used in the petrochemical industry for fluid loading and unloading. They utilize rotary joints, rigid pipes, and elbows to connect them. These flexible arms transfer liquids between trains, tank trucks, and trestle storage and transportation pipelines, replacing traditional hose connections. They offer high safety, flexibility, and a long service life. Loading and unloading methods can be categorized as either top loading or bottom loading.

[0003] For overhead loading and unloading, the crane pipe needs to be inserted into the tank truck. In order to improve the degree of automation, the crane pipe is generally inserted into the tank truck by electric or pneumatic means. However, in actual application, since the plug-in interface of the tank truck is very small, the crane pipe is easily worn due to misalignment, thereby shortening the service life of the crane pipe and increasing maintenance costs. Utility Model Content

[0004] Based on this, it is necessary to provide a telescopic mechanism for a crane pipe to address the problem that the crane pipe is easily worn due to misalignment, thereby shortening the service life of the crane pipe and increasing maintenance costs.

[0005] A telescopic mechanism for a crane pipe, comprising:

[0006] An upper crane tube, wherein a telescopic slot is provided in the upper crane tube;

[0007] a lower crane tube, the lower crane tube being telescopically connected to the upper crane tube and being inserted into the telescopic groove;

[0008] an elastic member, wherein the elastic member is embedded in the telescopic slot, one end of the elastic member abuts against the bottom of the telescopic slot, and the other end of the elastic member abuts against the lower lifting pipe; and

[0009] The limiting cover is fixedly connected to the upper crane tube, the limiting cover is provided with a limiting hole, and the end of the lower crane tube away from the upper crane tube passes through the limiting hole and extends out of the limiting cover.

[0010] The telescopic mechanism for the above-mentioned crane pipe, through the cooperation of the upper crane pipe, the lower crane pipe, the elastic part and the limit cover, can enable the lower crane pipe to move upward along the telescopic groove when the lower crane pipe is not aligned with the filling port, thereby avoiding the lower crane pipe from being damaged by direct collision with the tanker, thereby effectively extending the service life of the crane pipe and reducing maintenance costs.

[0011] In one embodiment, the lower lifting pipe includes a lower main pipe portion and a limiting ring portion connected to the lower main pipe portion, and the limiting ring portion is inserted into the telescopic groove.

[0012] In one embodiment, the wall thickness of the limiting ring portion is greater than the diameter of the limiting hole.

[0013] In one embodiment, the upper crane pipe includes an upper main pipe portion and a mounting portion connected to the upper main pipe portion, the mounting portion is provided with a mounting hole, and the limiting cover is provided with a fixing hole adapted to the mounting hole.

[0014] In one embodiment, the limiting cover includes a main cover portion, a fixing portion connected to the main cover portion, and a retaining ring portion connected to the main cover portion, the fixing portion is arranged on the outer side of the main cover portion, the retaining ring portion is arranged on the inner side of the main cover portion, the limiting hole is arranged on the main cover portion, and the fixing hole is arranged on the fixing portion.

[0015] In one embodiment, a clearance groove is provided on the inner side of the upper main pipe portion, and the retaining ring portion is inserted into the clearance groove.

[0016] In one embodiment, the telescopic mechanism for the crane pipe also includes a sealing ring, the retaining ring portion is provided with an outer sealing groove, the upper main pipe portion is provided with an inner sealing groove, the inner sealing groove is provided in the give way groove, and the sealing ring is embedded in the outer sealing groove and the inner sealing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a telescopic mechanism for a crane pipe in one embodiment of the present utility model;

[0018] Figure 2 For example Figure 1 The internal structure diagram of the telescopic mechanism for the crane pipe shown;

[0019] Figure 3 for Figure 2 Enlarged view of part A.

[0020] The meanings of the numbers in the accompanying drawings are:

[0021] 100- telescopic mechanism for crane pipe;

[0022] 10-upper crane pipe, 11-upper main pipe, 12-mounting part, 13-expansion slot, 14-mounting hole, 15-allowance slot, 16-inner sealing slot;

[0023] 20-lower crane pipe, 21-lower main pipe, 22-limiting ring;

[0024] 30- elastic member;

[0025] 40-limiting cover, 41-main cover, 42-fixing part, 43-blocking ring, 44-limiting hole, 45-fixing hole, 46-external sealing groove;

[0026] 50-Sealing ring. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] See also Figures 1 to 3 , which is a telescopic mechanism 100 for a crane tube in one embodiment of the present invention, includes an upper crane tube 10, a lower crane tube 20, an elastic member 30 and a limiting cover 40. The lower crane tube 20 is telescopically connected to the upper crane tube 10. The elastic member 30 is arranged in the upper crane tube 10, one end of the elastic member 30 abuts against the upper crane tube 10, and the other end of the elastic member 30 abuts against the lower crane tube 20. The limiting cover 40 is fixedly connected to the upper crane tube 10, and the end of the lower crane tube 20 away from the upper crane tube 10 extends out of the limiting cover 40.

[0034] See also Figures 1 to 3 The upper lifting pipe 10 includes an upper main pipe portion 11 and a mounting portion 12 connected to the upper main pipe portion 11. The upper main pipe portion 11 is provided with a telescopic slot 13. The mounting portion 12 is provided on the outside of the upper main pipe portion 11 and is provided with a mounting hole 14. The lower lifting pipe 20 includes a lower main pipe portion 21 and a retaining ring portion 22 connected to the lower main pipe portion 21. The retaining ring portion 22 is inserted into the telescopic slot 13. The elastic member 30 is embedded in the telescopic slot 13. One end of the elastic member 30 abuts against the bottom of the telescopic slot 13, and the other end of the elastic member 30 abuts against the retaining ring portion 22.

[0035] See also Figures 1 to 3The limiting cover 40 includes a main cover portion 41, a fixing portion 42 connected to the main cover portion 41, and a retaining ring portion 43 connected to the main cover portion 41. The main cover portion 41 is provided with a limiting hole 44. The end of the lower main pipe 21 away from the limiting ring portion 22 passes through the limiting hole 44 and extends out of the limiting cover 40. The wall thickness of the limiting ring portion 22 is greater than the diameter of the limiting hole 44. This ensures that the limiting ring portion 22 will not fall out of the expansion slot 13, effectively improving the operating stability of the crane pipe expansion mechanism 100.

[0036] See also Figures 1 to 3 The fixing portion 42 is provided on the outside of the main cover portion 41 and is provided with a fixing hole 45. A bolt passes through the fixing hole 45 and the mounting hole 14 and cooperates with a nut to securely connect the limit cover 40 to the upper lifting pipe 10. The retaining ring portion 43 is provided on the inside of the main cover portion 41. A clearance groove 15 is provided on the inside of the upper main pipe portion 11, and the retaining ring portion 43 is snapped into the clearance groove 15.

[0037] See also Figures 1 to 3 The crane pipe telescopic mechanism 100 further includes a sealing ring 50. The retaining ring portion 43 is provided with an outer sealing groove 46, and the upper main pipe portion 11 is provided with an inner sealing groove 16. The inner sealing groove 16 is provided within the clearance groove 15. The sealing ring 50 is embedded in the outer sealing groove 46 and the inner sealing groove 16. This effectively improves the sealing performance between the limit cover 40 and the upper crane pipe 10, effectively preventing leakage of petrochemical fluids.

[0038] The crane tube telescopic mechanism 100 of this embodiment operates as follows: During operation, the crane tube drive device drives the upper crane tube 10 downward, and the lower crane tube 20 moves accordingly, until the lower crane tube 20 is inserted into the filling port of the tanker truck. When the lower crane tube 20 is not aligned with the filling port, the lower end of the lower crane tube 20 contacts the tanker truck. Under the force applied by the tanker truck, the lower crane tube 20 moves upward along the telescopic slot 13, thereby preventing the lower crane tube 20 from being damaged by direct collision with the tanker truck, thereby effectively extending the service life of the crane tube. As the crane tube drive device drives the upper crane tube 10 upward, the elastic member 30 gradually resets the lower crane tube 20.

[0039] The beneficial effect of the present invention is that, through the cooperation of the upper crane tube 10, the lower crane tube 20, the elastic member 30 and the limit cover 40, the lower crane tube 20 can move upward along the telescopic groove 13 when the lower crane tube 20 is not aligned with the filling port, thereby preventing the lower crane tube 20 from directly colliding with the tanker and being damaged, thereby effectively extending the service life of the crane tube and reducing maintenance costs.

[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A telescopic mechanism for a crane pipe, characterized in that: include: An upper crane tube, wherein a telescopic slot is provided in the upper crane tube; a lower crane tube, the lower crane tube being telescopically connected to the upper crane tube and being inserted into the telescopic groove; an elastic member, wherein the elastic member is embedded in the telescopic slot, one end of the elastic member abuts against the bottom of the telescopic slot, and the other end of the elastic member abuts against the lower lifting pipe; as well as The limiting cover is fixedly connected to the upper crane tube, the limiting cover is provided with a limiting hole, and the end of the lower crane tube away from the upper crane tube passes through the limiting hole and extends out of the limiting cover.

2. The telescopic mechanism for crane pipe according to claim 1, characterized in that: The lower lifting pipe includes a lower main pipe portion and a limiting ring portion connected to the lower main pipe portion, and the limiting ring portion is clamped in the telescopic groove.

3. The telescopic mechanism for crane pipe according to claim 2, characterized in that: The wall thickness of the limiting ring portion is greater than the diameter of the limiting hole.

4. The telescopic mechanism for crane pipe according to claim 1, characterized in that: The upper lifting pipe includes an upper main pipe portion and a mounting portion connected to the upper main pipe portion, the mounting portion is provided with a mounting hole, and the limiting cover is provided with a fixing hole adapted to the mounting hole.

5. The telescopic mechanism for crane pipe according to claim 4, characterized in that: The limiting cover includes a main cover part, a fixing part connected to the main cover part, and a retaining ring part connected to the main cover part. The fixing part is arranged on the outside of the main cover part, the retaining ring part is arranged on the inside of the main cover part, the limiting hole is arranged on the main cover part, and the fixing hole is arranged on the fixing part.

6. The crane pipe telescopic mechanism according to claim 5, characterized in that: A clearance groove is provided on the inner side of the upper main pipe portion, and the retaining ring portion is clamped in the clearance groove.

7. The telescopic mechanism for crane pipe according to claim 6, characterized in that: It also includes a sealing ring, the retaining ring portion is provided with an outer sealing groove, the upper main pipe portion is provided with an inner sealing groove, the inner sealing groove is provided in the give way groove, and the sealing ring is embedded in the outer sealing groove and the inner sealing groove.

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