Rotary joint convenient for fast refueling

Abstract

The utility model relates to the technical field of engineering machinery, and provides a rotary joint convenient for fast refueling, which comprises an inner cylinder connected with a base of a material grabbing machine and an outer cylinder connected with an upper vehicle, the outer cylinder is movably sleeved on the inner cylinder, and the outer cylinder is connected with a first refueling pipe communicated with an oil tank of the upper vehicle. The inner cylinder is connected with a second oil filling pipe communicated with an oil tank of the base, an oil filling ring groove is formed in the inner wall of the outer cylinder, the outer side of the oil filling ring groove is communicated with the first oil filling pipe through a first connecting hole formed in the outer cylinder, and the inner side of the oil filling ring groove is communicated with the second oil filling pipe through a second connecting hole formed in the inner cylinder. Diesel circulation between the base oil tank and the upper vehicle oil tank is achieved, the structure is simple and reliable, the operation difficulty is lowered, manual operation steps are reduced, an operator does not need to align oil pipes of the upper vehicle oil tank and the lower vehicle oil tank, the upper vehicle and the base can rotate relatively, refueling can be conducted at any time as long as the rotary connector is in a connected state, and refueling convenience and flexibility are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery technical field, specifically, relate to a rotary joint convenient to quick oiling. BACKGROUND

[0002] In the engineering machinery field, the engine of large portal type grab is usually diesel engine, and the oil tank is divided into the upper car oil tank and the lower car oil tank, and the capacity of the upper car oil tank can only meet the continuous work of diesel engine for 8 hours, and the lower car oil tank stores a large amount of diesel oil as a standby oil tank. When the oil quantity of the upper car oil tank is insufficient, oil needs to be added from the lower car oil tank to the upper car oil tank, and in the prior art, the upper and lower cars need to be aligned before oiling, the driver needs to drag the oiling pipe provided with a quick connector to the upper car, insert the quick connector and open the oil gun to add oil, and then remove the quick connector after oiling, and the existing rotary joint only has a hydraulic oil return channel, and there is no diesel oil return channel, and the lower car oiling pipe and the upper car oiling pipe are separately arranged.

[0003] However, the prior art has many obvious defects, the quick connector is removed and placed on the car, and dust is easy to enter the end face, which can cause oil tank pollution; because the upper and lower car oiling pipes are separately arranged and the rotary joint lacks a diesel oil return channel, the upper and lower cars must be aligned before oiling, and if the upper and lower cars are not aligned or the pipeline is not long enough, oiling cannot be performed, the operation is relatively complicated, and the additional hose can easily bring dust and other impurities into the oil tank, affecting engine operation; in winter with ice and snow, personnel are easy to slip when manually operating, and there is a safety hazard. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a rotary joint convenient to quick oiling, and solves the problems of complicated oiling of the grab and easy pollution.

[0005] The utility model discloses the following technical scheme realizes: a rotary joint convenient to quick oiling is used to add diesel oil to the upper car of the grab, and includes the inner tube connected with the base of the grab and the outer tube connected with the upper car, the outer tube is movably sleeved on the inner tube, the outer tube is connected with the first oiling pipe that communicates with the oil tank of the upper car, the inner tube is connected with the second oiling pipe that communicates with the oil tank of the base, the inner wall of the outer tube is provided with the oiling ring groove, the first connecting hole of the outer tube is communicated with the first oiling pipe on the outside of the oiling ring groove, and the second connecting hole of the inner tube is communicated with the second oiling pipe on the inside of the oiling ring groove.

[0006] Further, the inner wall of the outer tube is provided with the sealing groove for cooperating with the sealing ring on the both sides of the oiling ring groove.

[0007] Further, the inner wall of the outer tube is provided with the oil leakage ring groove, the outer tube is connected with the oil discharge pipe that communicates with the oil leakage ring groove, and the end of the oil discharge pipe is detachably connected with the plug.

[0008] Further, the oil drain pipe is provided with a transparent pipe for observing oil leakage.

[0009] Further, the outer cylinder comprises a chuck, a pressing disc and a cylinder body which are sequentially fastened from top to bottom by bolts, the chuck is connected with the upper vehicle, and the pressing disc abuts against the top end of the inner cylinder.

[0010] Further, the inner cylinder is provided with a clamping groove on the outer wall for limiting the sleeve cylinder.

[0011] Further, the inner cylinder is provided with a through hole for wire passing.

[0012] Further, the inner cylinder is connected with the base through the connecting disc arranged at the bottom.

[0013] The utility model has at least the following advantages and beneficial effects: through the arrangement of the inner cylinder and the outer cylinder, the inner cylinder is installed on the base of the grab machine and connected with the oil tank of the base of the grab machine, the outer cylinder is fixed with the upper vehicle of the grab machine and connected with the oil tank of the upper vehicle, the circulation of diesel oil between the oil tank of the base and the oil tank of the upper vehicle is realized, the structure is simple and reliable, the operation difficulty is reduced, the manual operation steps are reduced, the operator does not need to align the oil pipes of the upper and lower vehicle oil tanks, the upper vehicle and the base can relatively rotate, as long as the rotating joint is in the connection state, oil can be added at any time, the convenience and flexibility of oil adding are improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model provides a structure schematic drawing of a rotating joint convenient for quick oil adding.

[0015] Figure 2 The utility model provides another structure schematic drawing of a rotating joint convenient for quick oil adding.

[0016] Figure 3 The utility model provides a front view of a rotating joint convenient for quick oil adding.

[0017] Figure 4 The utility model provides Figure 3 The utility model provides a sectional view along A-A direction.

[0018] Figure 5 The utility model provides Figure 4 The utility model provides a sectional view along B-B direction.

[0019] Figure 6 The utility model provides Figure 3 The utility model provides a sectional view along C-C direction.

[0020] Figure 7 The utility model provides Figure 3 The utility model provides a sectional view along D-D direction.

[0021] Reference numerals: 1-Outer cylinder, 101-Chuck, 102-Pressure plate, 103-Cylinder body, 10-First connecting hole, 11-First oil filling pipe, 12-Oil filling ring groove, 13-Sealing groove, 14-Oil leakage ring groove, 2-Inner cylinder, 20-Second connecting hole, 21-Second oil filling pipe, 22-Chuck groove, 23-Through hole, 24-Connecting plate, 3-Oil drain pipe, 31-Plug, 32-Transparent tube. Detailed Implementation

[0022] The specific implementation method is described below with reference to the accompanying drawings.

[0023] Example

[0024] like Figures 1 to 7 As shown in this embodiment, a rotary joint for quick refueling is disclosed, used for adding diesel fuel to the upper vehicle of a material handling machine, especially suitable for large gantry-type material handling machines. Its main structure includes an inner cylinder 2 connected to the base of the material handling machine and an outer cylinder 1 connected to the upper vehicle. The outer cylinder 1 is movably sleeved on the inner cylinder 2. The outer cylinder 1 is connected to a first refueling pipe 11 communicating with the fuel tank of the upper vehicle. The inner cylinder 2 is connected to a second refueling pipe 21 communicating with the fuel tank of the base. A refueling ring groove 12 is formed on the inner wall of the outer cylinder 1. The outer side of the refueling ring groove 12 communicates with the first refueling pipe 11 through a first connecting hole 10 in the outer cylinder 1, and the inner side of the refueling ring groove 12 communicates with the second refueling pipe 21 through a second connecting hole 20 in the inner cylinder 2. Specifically, the material handling machine includes a base and an upper vehicle rotatably connected to the base. A base fuel tank is provided on the base, and an upper vehicle fuel tank is provided on the upper vehicle. With the inner cylinder 2 and outer cylinder 1, the inner cylinder 2 is installed on the base of the grabber and connected to the base oil tank; the outer cylinder 1 is fixed to the upper vehicle of the grabber and connected to the upper vehicle oil tank, realizing the flow of diesel fuel between the base oil tank and the upper vehicle oil tank. In traditional gantry-type grabbers, when refueling from the base oil tank to the upper vehicle oil tank, the operator needs to align the upper and lower vehicles before dragging the refueling hose to connect. Quick-connect couplings are prone to dust contamination of the oil tank, and refueling is impossible if the upper and lower vehicles are not aligned or the hose length is insufficient. This rotary joint structure is simple and reliable, reducing the difficulty of operation and manual operation steps. The operator does not need to align the oil hoses of the upper and lower vehicle oil tanks. The upper vehicle and the base can rotate relative to each other. As long as the rotary joint is connected, refueling can be done at any time, improving the convenience and flexibility of refueling.

[0025] Furthermore, in specific implementation, such as Figure 4 , Figure 5 As shown, in this embodiment of the invention, the inner wall of the outer cylinder 1 is provided with sealing grooves 13 on both sides of the oiling ring groove 12 for installing sealing rings. Specifically, the sealing rings are filled in the sealing grooves 13, tightly fitting the contact surfaces of the inner cylinder 2 and the outer cylinder 1, preventing diesel fuel leakage, preventing environmental pollution, ensuring the stable operation of the material handling machine's oiling system, and thus improving the overall reliability of the material handling machine.

[0026] Further, in the specific implementation, as shown in Figure 5 , Figure 7 , the outer cylinder 1 is provided with an oil leakage ring groove 14 on the inner wall, the outer cylinder 1 is connected with an oil discharge pipe 3 in communication with the oil leakage ring groove 14, and the end of the oil discharge pipe 3 is detachably connected with a plug 31. It should be noted that the rotary joint can also be used as a transfer joint for other liquids (for example, hydraulic oil), the oil filling ring groove 12 is arranged at the lower part of the inner cylinder 2, and the oil leakage ring groove 14 is arranged above the oil filling ring groove 12, which is to prevent diesel oil from leaking upward and prevent cross flow with the upper liquid, and the oil leakage ring groove 14 constitutes a barrier to prevent leakage.

[0027] Further, in the specific implementation, as shown in Figure 2 , Figure 3 and Figure 5 , the oil discharge pipe 3 is provided with a transparent pipe 32 for observing the oil leakage condition. The operator can directly observe the oil leakage condition through the transparent pipe 32 to judge whether the sealing performance of the rotary joint is good or not, so as to timely discharge the leaked oil and replace the sealing ring, which reduces the troubleshooting time in the maintenance process and improves the maintenance efficiency.

[0028] Further, in the specific implementation, as shown in Figures 1-5 , the outer cylinder 1 includes a chuck 101, a pressure plate 102 and a cylinder body 103 which are fastened from top to bottom by bolts, which facilitates the installation and disassembly of the outer cylinder 1, reduces the maintenance difficulty, and improves the maintenance and replacement efficiency; wherein the chuck 101 is connected with the upper vehicle, the pressure plate 102 abuts against the top end of the inner cylinder 2, and the axial position of the outer cylinder 1 is limited, so that the oil filling ring groove 12 and the second connecting hole 20 always maintain an aligned state.

[0029] Further, in the specific implementation, as shown in Figure 4 , Figure 5 , the outer wall of the inner cylinder 2 is provided with a clamping groove 22 for limiting the sleeve cylinder body 103, which facilitates the positioning and installation of the outer cylinder 1.

[0030] Further, in the specific implementation, as shown in Figure 4 , Figure 5 , the inner cylinder 2 is provided with a through hole 23 for wire passing in the axial direction. Specifically, the through hole 23 provides a special wiring channel for the wires, signal lines and the like inside the grabbing machine. It avoids the interference between the wires and the diesel pipeline inside the rotary joint, reduces the risk of electrical failure caused by wire abrasion and extrusion, and also makes the wiring inside the equipment more neat and standardized, which is convenient for subsequent inspection and maintenance.

[0031] Further, in the specific implementation, as shown in Figures 1-5As shown, the inner cylinder 2 provided in the embodiment of the utility model is connected with the base through the connecting disc 24 arranged at the bottom. The connecting disc 24 increases the contact area of the inner cylinder 2 and the base, and ensures the reliable connection between the rotary joint and the base of the grab machine.

Claims

1. A swivel joint for facilitating quick refueling of a material handling machine, for adding diesel to the upper carriage of the machine, characterized in that, The device comprises an inner cylinder (2) connected with a base of the grab and an outer cylinder (1) connected with a car, the outer cylinder (1) movably sleeving the inner cylinder (2), the outer cylinder (1) being connected with a first oil filling pipe (11) in communication with an oil tank of the car, the inner cylinder (2) being connected with a second oil filling pipe (21) in communication with an oil tank of the base, an oil filling ring groove (12) being formed in an inner wall of the outer cylinder (1), the oil filling ring groove (12) being in communication with the first oil filling pipe (11) through a first connecting hole (10) formed in the outer cylinder (1), and the oil filling ring groove (12) being in communication with the second oil filling pipe (21) through a second connecting hole (20) formed in the inner cylinder (2).

2. A swivel according to claim 1, characterized in that Sealing grooves (13) for matching and mounting sealing rings are formed in the inner wall of the outer cylinder (1) on both sides of the oil filling ring groove (12).

3. A swivel according to claim 2, characterized in that An oil leakage ring groove (14) is formed in the inner wall of the outer cylinder (1), a drain pipe (3) is connected with the oil leakage ring groove (14), and a plug (31) is detachably connected with an end of the drain pipe (3).

4. A swivel according to claim 3, characterized in that A transparent pipe (32) for observing oil leakage is arranged on the drain pipe (3).

5. A swivel according to claim 1, characterized in that The outer cylinder (1) comprises a chuck (101), a pressing disc (102) and a cylinder body (103) which are fastened in sequence from top to bottom by bolts, the chuck (101) is connected with the car, and the pressing disc (102) abuts against a top end of the inner cylinder (2).

6. A swivel according to claim 5, characterized in that A clamping groove (22) for limiting and sleeving the cylinder body (103) is formed in an outer wall of the inner cylinder (2).

7. A swivel according to claim 1, characterized in that A through hole (23) for wire passing is formed in the inner cylinder (2) in an axial direction.

8. A swivel according to claim 1, characterized in that The inner cylinder (2) is connected with the base through a connecting disc (24) arranged at a bottom.

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