Combined welding airtight oil storage cylinder

Abstract

The utility model discloses a combined welding airtight oil storage cylinder, belongs to the technical field of hydraulic oil cylinders, and solves the problems that the welding difficulty is high, the welding quality is not easy to control and the structural strength of the oil storage cylinder is influenced as annular oil storage cavities of the existing oil storage cylinder are symmetrically distributed between two splice plates. The oil storage tank comprises two splicing plates which are spliced together, an annular oil storage cavity is formed in the splicing end face of one splicing plate, the splicing face of the two splicing plates is a step face, and an inner welding seam and an outer welding seam are formed in the inner side and the outer side of the step face respectively through welding. According to the combined welding sealing oil storage cylinder, the risk that the wall of the annular oil storage cavity is welded through is eliminated, and the structural strength of the oil storage cylinder is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, and more specifically, it relates to a combined welded sealed oil storage cylinder. Background Art

[0002] An oil storage cylinder is a hydraulic cylinder with an annular oil storage cavity inside. Currently, the annular oil storage cavity of the oil storage cylinder is symmetrically distributed between the upper and lower plates, that is, the upper plate has a sunk groove, and the lower plate also has a sunk groove. After the upper plate and the lower plate are butted, the two sunk grooves are also butted to form an annular oil storage cavity. After the upper and lower plates are combined, the butted joint is welded to form a sealed oil storage cylinder, and the weld is located in the middle of the annular oil storage cavity.

[0003] The current structure of the oil storage cylinder has the following disadvantages:

[0004] 1. The annular oil storage cavity is symmetrically distributed between the upper and lower plates. To ensure the strength of the oil storage cylinder after welding, the upper and lower plates need to be grooved at the middle position of the annular oil storage cavity at the same time, which greatly weakens the strength of the oil storage cylinder;

[0005] 2. The weld is located in the middle of the annular oil storage cavity, so the weld needs to have a high welding quality. It is easy for the welder to weld through the side wall of the oil storage cylinder, and the quality is difficult to control;

[0006] 3. The joint between the upper and lower plates is not tight, and it is easy for welding slag to penetrate during the welding process and block the annular oil storage cavity, resulting in the inability to change the oil pressure in the oil storage cylinder or affecting the measurement accuracy;

[0007] 4. It is easy for welding slag to penetrate and form a blocking space. When filling hydraulic oil, the air cannot be discharged completely, affecting the measurement accuracy of the sensor.

[0008] Therefore, it is urgent to design a new type of combined welded sealed oil storage cylinder to solve the above problems. Summary of the Utility Model

[0009] The technical problem to be solved by the utility model is in view of the above deficiencies of the prior art. The purpose of the utility model is to provide a combined welded sealed oil storage cylinder, which eliminates the risk of welding through the wall of the annular oil storage cavity and ensures the structural strength of the oil storage cylinder.

[0010] To achieve the above purpose, the utility model provides a combined welded sealed oil storage cylinder, which includes two splicing plates spliced together. An annular oil storage cavity is provided on the splicing end face of one of the splicing plates. The splicing surface of the two splicing plates is a stepped surface, and an inner weld and an outer weld are respectively formed by welding on the inner and outer sides of the stepped surface.

[0011] As a further improvement, one of the splicing plates is an upper plate, and the other splicing plate is a lower plate. The annular oil storage cavity is located at the bottom end face of the upper plate.

[0012] Furthermore, a circular protrusion is provided on the top end surface of the lower plate. The circular protrusion is inserted into the circular oil storage cavity, and the height of the circular protrusion is less than the depth of the circular oil storage cavity.

[0013] Furthermore, the two side wall surfaces of the circular protrusion are in contact with the two inner wall surfaces of the circular oil storage cavity, and the bottom end surfaces of the upper plates on both sides of the circular oil storage cavity are in contact with the top end surfaces of the lower plates on both sides of the circular protrusion to form the stepped surface.

[0014] Furthermore, the corresponding grooves of the inner weld and the outer weld are provided on the side walls of the bottom end surface of the upper plate and the side walls of the top end surface of the lower plate.

[0015] Furthermore, an oil inlet and an oil outlet communicating with the circular oil storage cavity are respectively provided on the lower plate.

[0016] Furthermore, threaded holes for installation may be provided at the bottom end of the lower plate.

[0017] Furthermore, a circular sunk groove is provided on the top of the upper plate.

[0018] Furthermore, at least two lifting holes are provided on the outer side of the upper plate.

[0019] Furthermore, the cross-sectional width of the circular sunk groove is greater than or equal to the cross-sectional width of the circular oil storage cavity.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present utility model has the following advantages:

[0022] 1. For the combined welded and sealed oil storage cylinder of the present utility model, its inner and outer welds are both arranged on the stepped surface where the two splicing plates are spliced. There is a certain distance between the weld and the circular oil storage cavity, and this distance is a stepped surface with a curved setting. During welding, the welding slag cannot penetrate into the interior of the circular oil storage cavity, ensuring the cleanliness of the interior of the circular oil storage cavity. When filling hydraulic oil, air can be completely excluded, eliminating the interference of air. At the same time, when the upper plate is pressurized, all the forces can be completely applied to the bottom surface of the oil cavity and then transmitted to the hydraulic oil in the oil cavity, making the oil pressure change of the hydraulic oil more consistent with the actual bearing pressure and ensuring the measurement accuracy.

[0023] 2. For the combined welded and sealed oil storage cylinder of the present utility model, its circular oil storage cavity is separately provided on one of the splicing plates, and the weld is avoided from the position of the circular oil storage cavity and moved to the stepped surface, eliminating the risk of welding through the wall of the circular oil storage cavity, making it more convenient for workers to weld, and thus ensuring the structural strength of the oil storage cylinder. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 For Figure 1 The enlarged schematic diagram of the structure at position A in the figure;

[0026] Figure 3 The schematic diagram of the structure of the upper plate in the present utility model;

[0027] Figure 4 The schematic diagram of the structure of the lower plate in the present utility model.

[0028] Wherein: 1 - annular oil storage cavity, 2 - step surface, 3 - inner weld, 4 - outer weld, 5 - upper plate, 6 - lower plate, 7 - annular protrusion, 8 - oil inlet, 9 - oil outlet, 10 - threaded hole, 11 - annular groove, 12 - lifting hole, 13 - bevel groove. Specific embodiments

[0029] The present utility model will be further described below with reference to specific embodiments in the accompanying drawings.

[0030] A combined welded sealed oil storage cylinder of the present utility model includes two splicing plates spliced together, which is a combined oil storage cylinder. An annular oil storage cavity 1 is provided on the splicing end face of one of the splicing plates, that is, the annular oil storage cavity 1 is independently provided on one of the splicing plates. The splicing surface of the two splicing plates is a step surface 2 to prevent welding slag from leaking, and inner weld 3 and outer weld 4 are respectively formed on the inner and outer sides of the step surface 2 by welding to form a sealed annular oil storage cavity 1.

[0031] Referring to Figures 1-4 Taking the oil storage cylinder composed of two splicing plates arranged oppositely up and down as an example, in this embodiment, one of the splicing plates is an upper plate 5 and the other is a lower plate 6. Among them, the annular oil storage cavity 1 is located at the bottom end face of the upper plate 5. Arranging the annular oil storage cavity 1 in the upper plate 5 is more convenient for connecting the oil storage cylinder with other components.

[0032] Preferably, an annular protrusion 7 is provided on the top end face of the lower plate 6, and the annular protrusion 7 is inserted into the annular oil storage cavity 1. When the upper plate 5 and the lower plate 6 are spliced, it can play a positioning role to realize the quick and accurate splicing of the upper and lower plates, and the height of the annular protrusion 7 is less than the depth of the annular oil storage cavity 1 to ensure that there is a certain oil storage space in the annular oil storage cavity 1. Further, the two side wall surfaces of the annular protrusion 7 are attached to the two inner wall surfaces of the annular oil storage cavity 1, which can effectively improve the positioning accuracy, and the bottom end surfaces of the upper plate 5 on both sides of the annular oil storage cavity 1 are attached to the top end surfaces of the lower plate 6 on both sides of the annular protrusion 7 to form the above-mentioned step surface 2.

[0033] The combined welded sealed oil storage cylinder of the utility model has its inner and outer welds arranged on the step surface 2 of the two splicing plates. There is a certain distance between the weld and the annular oil storage cavity 1, and the distance is the curved step surface 2. During welding, welding slag cannot penetrate into the interior of the annular oil storage cavity 1, thereby ensuring the cleanliness of the interior of the annular oil storage cavity 1. When the hydraulic oil is filled in, the air can be completely excluded to eliminate the interference of the air. At the same time, when the upper plate 5 is under pressure, all the force can be fully applied to the bottom surface of the oil cavity and then transmitted to the hydraulic oil in the oil cavity, so that the oil pressure change of the hydraulic oil is more consistent with the actual bearing pressure, thereby ensuring the measurement accuracy.

[0034] At the same time, the annular oil storage chamber 1 of the oil storage cylinder is separately opened on one of the splicing plates, and the weld avoids the position of the annular oil storage chamber 1 and is moved to the step surface 2, eliminating the risk of welding through the wall of the annular oil storage chamber, making it more convenient for workers to weld, thereby ensuring the structural strength of the oil storage cylinder.

[0035] Preferably, in order to improve the welding quality, grooves 13 are provided on the upper plate 5 and the lower plate 6 corresponding to the inner weld 3 and the outer weld 4, and the grooves 13 corresponding to the inner weld 3 and the outer weld 4 are both provided on the bottom end surface side wall of the upper plate 5 and the top end surface side wall of the lower plate 6, which facilitates welding while ensuring the strength of the side wall of the oil storage cylinder.

[0036] Preferably, an oil inlet 8 and an oil outlet 9 connected to the annular oil storage chamber 1 are respectively provided on the lower plate 6 to facilitate the inflow and outflow of the hydraulic oil.

[0037] Preferably, a threaded hole 10 for installation may be further provided at the bottom end of the lower plate 6, and there may be at least two threaded holes 10, so that the oil storage cylinder can be installed and fixed on other components.

[0038] Preferably, an annular groove 11 is further provided on the top of the upper plate 5, and the position of the annular groove 11 corresponds to the position of the annular oil storage chamber 1. On the one hand, it can reduce the weight of the oil storage cylinder, and on the other hand, it reduces the thickness of the bottom surface of the annular oil storage chamber 1, making this position thinner and easier to deform, so that the oil pressure change of the hydraulic oil is more consistent with the actual bearing pressure, further improving the measurement accuracy.

[0039] Preferably, at least two lifting holes 12 are provided on the outer side of the upper plate 5 , and the lifting holes 12 are communicated with the annular sink 11 , so as to facilitate lifting and assembling the oil storage cylinder.

[0040] Preferably, the cross-sectional width of the annular sink groove 11 is greater than or equal to the cross-sectional width of the annular oil storage cavity 1 , so as to further improve the deformation performance of the bottom surface of the annular oil storage cavity 1 .

[0041] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can be made, and these will not affect the implementation effect of the present utility model and the practicability of the patent.

Claims

1. A combined welded airtight oil storage cylinder, comprising two splicing plates spliced together, characterized in that, An annular oil storage cavity (1) is formed on the splicing end face of one of the splicing plates. The splicing surfaces of the two splicing plates are stepped surfaces (2), and inner weld seams (3) and outer weld seams (4) are respectively formed by welding on the inner and outer sides of the stepped surface (2).

2. The combined welded airtight oil storage cylinder according to claim 1, characterized in that, One of the splicing plates is an upper plate (5), and the other splicing plate is a lower plate (6). The annular oil storage cavity (1) is located at the bottom end face of the upper plate (5).

3. The combined welded airtight oil storage cylinder according to claim 2, characterized in that, An annular protrusion (7) is formed on the top end face of the lower plate (6). The annular protrusion (7) is inserted into the annular oil storage cavity (1), and the height of the annular protrusion (7) is less than the depth of the annular oil storage cavity (1).

4. A combined welded airtight oil storage cylinder according to claim 3, characterized in that, The two side wall surfaces of the annular protrusion (7) are in contact with the two inner wall surfaces of the annular oil storage cavity (1), and the bottom end faces of the upper plate (5) on both sides of the annular oil storage cavity (1) are in contact with the top end faces of the lower plate (6) on both sides of the annular protrusion (7) to form the stepped surface (2).

5. The combined welded airtight oil storage cylinder according to claim 2, wherein, The corresponding grooves (13) of the inner weld seam (3) and the outer weld seam (4) are formed on the side walls of the bottom end face of the upper plate (5) and the side walls of the top end face of the lower plate (6).

6. A combined welded airtight oil storage cylinder according to any one of claims 2-5, characterized in that, An oil inlet (8) and an oil outlet (9) communicating with the annular oil storage cavity (1) are respectively formed on the lower plate (6).

7. A combined welded airtight oil storage cylinder according to claim 6, characterized in that, Threaded holes (10) for installation can be formed at the bottom end of the lower plate (6).

8. A combined welded airtight oil storage cylinder according to claim 6, characterized in that, An annular sinking groove (11) is formed at the top of the upper plate (5).

9. The combined welded airtight oil storage cylinder according to claim 8, wherein At least two hoisting holes (12) are formed on the outer side of the upper plate (5).

10. A combined welded airtight oil storage cylinder according to claim 8, characterized in that, The cross-sectional width of the annular sinking groove (11) is greater than or equal to the cross-sectional width of the annular oil storage cavity (1).

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