Hydraulic valve block mounting mechanism

Abstract

The utility model discloses a hydraulic valve block mounting mechanism, which comprises a hydraulic cylinder body, a valve block and an oil port, the valve block is fixed on the cylinder body by adopting an intermittent welding seam, and the oil port is embedded in the valve block and is fixed on the cylinder body by adopting an airtight welding seam; and a sealing ring is arranged between the valve block and the oil port. According to the hydraulic valve block, a welding seam between the hydraulic valve block and the oil port is omitted, the influence of welding stress on the welding seam during later welding is avoided, and the maintainability of the valve block is greatly improved.

Description

Technical Field

[0001] The utility model relates to a hydraulic valve, in particular to a hydraulic valve block installation mechanism. Background Art

[0002] A hydraulic valve block is usually welded on the hydraulic cylinder body of the rock drill, which is used to fix the hydraulic balance valve. An oil port is also welded at the center of the valve block, and the oil cavity of the oil port is directly opposite to the oil outlet of the hydraulic balance valve.

[0003] The oil port and the cylinder body are connected by an airtight weld, which is required to be free of defects such as cracks, otherwise oil leakage from the leakage channel will occur. The hydraulic valve block and the cylinder body are connected by intermittent welding, and no sealing is required. The hydraulic valve block and the oil port are connected by a non-airtight weld, and the non-airtight weld must be processed flat together with the upper surface of the hydraulic valve block after welding. First, weld the airtight weld, and then perform a pressure test to verify that the airtight weld has no welding defects and no oil leakage. Then weld the non-airtight weld and intermittent weld. Finally, process the non-airtight weld and the upper surface of the hydraulic valve block at the same time to make the surface flat and smooth. However, oil leakage around the hydraulic valve block often occurs during use. According to the fault phenomenon, it is judged that: cracks appear in the airtight weld, hydraulic oil flows out from the leakage channel, and then leaks from the periphery of the hydraulic valve block through another leakage channel. Analysis of the possible causes of the cracks is: the non-airtight weld and intermittent weld are welded later than the airtight weld, and welding stress is inevitably present due to welding. The welding stress will cause delayed cracks to gradually appear in the airtight weld during later use. When the cracks penetrate, hydraulic oil will leak from channel a.

[0004] According to the statistics of faulty oil cylinders, the proportion of such oil leakage failures is as high as 70%. Moreover, once the valve block leaks oil, the cylinder body can only be scrapped. Utility Model Content

[0005] In order to solve the defects of the above-mentioned prior art, the utility model provides a hydraulic valve block installation mechanism. The utility model eliminates the weld between the hydraulic valve block and the oil port, avoiding the influence of welding stress on the weld during later welding. The utility model greatly improves the maintainability of the valve block.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a hydraulic valve block installation mechanism, including a hydraulic cylinder body, a valve block, and an oil port, the valve block is fixed to the cylinder body by intermittent welds, the oil port is embedded in the valve block and fixed to the cylinder body by an airtight weld; a sealing ring is arranged between the valve block and the oil port.

[0007] Furthermore, a first accommodating groove and a second accommodating groove are sequentially provided along the thickness direction on a side surface of the valve block close to the cylinder body, and the oil port includes a chassis and an oil column, the chassis is arranged in the first accommodating groove, and the oil column is arranged in the second accommodating groove, the outer wall of the chassis contacts the cylinder body and is airtightly welded on all sides, and a third accommodating groove is provided on the inner wall of the second accommodating groove for installing the sealing ring, and the sealing ring is sleeved on the oil column.

[0008] Further, the first accommodating groove and the second accommodating groove are coaxial, and the diameter of the first accommodating groove is greater than the diameter of the second accommodating groove.

[0009] Furthermore, the valve block is further provided with an oil hole, the oil hole is communicated with the second containing groove, and the diameter of the oil hole is smaller than the diameter of the second containing groove.

[0010] Furthermore, a through hole is opened in the center of the oil port, and the through hole corresponds to the oil hole.

[0011] Furthermore, the chassis and the oil column are coaxially arranged, and the diameter of the chassis is larger than the diameter of the oil column.

[0012] In summary, the utility model has achieved the following technical effects:

[0013] The utility model eliminates the weld between the hydraulic valve block and the oil port, thus avoiding the influence of welding stress on the weld during later welding.

[0014] The utility model greatly improves the maintainability of the valve block. If a weld oil leakage fault occurs in the hydraulic cylinder during use, the sealing ring can be replaced or the weld can be repaired at the hydraulic cylinder use site to eliminate the oil leakage fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a hydraulic valve block installation mechanism provided by the embodiment of the utility model;

[0016] Figure 2 It is a partial schematic diagram of the valve block;

[0017] Figure 3 It is a schematic diagram of the oil port cross section. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0020] 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] Example:

[0025] Figure 1 It is a hydraulic valve block installation mechanism. Figure 2 This is a partial schematic diagram of the valve block. Figure 3: It is a schematic cross-sectional view of an oil port, comprising a hydraulic cylinder body 1, a valve block 2, and an oil port 3. The valve block 2 is fixed to the cylinder body 1 by intermittent welding, and the oil port 3 is embedded in the valve block 2 and fixed to the cylinder body 1 by airtight welding; a sealing ring 4 is arranged between the valve block 2 and the oil port 3. A first receiving groove 203 and a second receiving groove 202 are sequentially opened along the thickness direction on a side surface of the valve block 2 close to the cylinder body 1. The oil port 3 comprises a bottom plate 32 and an oil column 31. The bottom plate 32 is arranged in the first receiving groove 203, and the oil column 31 is arranged in the second receiving groove 202. The outer wall of the bottom plate 32 contacts the cylinder body 1 and is welded all around. The inner wall of the second receiving groove 202 is provided with a third receiving groove 204 for installing the sealing ring 4, and the sealing ring 4 is sleeved on the oil column 31.

[0026] In the utility model, the cylinder body 1 and the valve block 2 are intermittently welded, the oil port 3 and the cylinder body 1 are airtightly welded, and the oil port 3 and the valve block 2 are connected with a sealing ring, thereby replacing the situation in which welding between the oil port 3 and the valve block 2 in the original technology causes cracking of the airtight welding between the oil port 3 and the cylinder body 1. The utility model has good sealing effect and the weld will not crack.

[0027] like Figure 2 As shown, the first receiving groove 203 and the second receiving groove 202 are coaxial, and the diameter of the first receiving groove 203 is larger than the diameter of the second receiving groove 202. The bottom plate 32 and the oil column 31 are coaxially arranged, and the diameter of the bottom plate 32 is larger than the diameter of the oil column 31. The oil port 3 is arranged in a T-shaped platform to increase the connection area with the cylinder body and achieve a good sealing effect.

[0028] The valve block 2 is also provided with an oil hole 201, which is connected to the second receiving groove 202. The diameter of the oil hole 201 is smaller than the diameter of the second receiving groove 202. A through hole 34 is provided at the center of the oil port 3, which corresponds to the oil hole 201 for easy use.

[0029] The oil port 3 of the utility model is connected to the cylinder body 1 through an airtight weld 12. The airtight weld 12 is an airtight weld. It is required that the weld must not have defects such as cracks, otherwise oil leakage failure in the leakage channel b will occur. The hydraulic valve block 2 and the cylinder body 1 are connected through a non-airtight weld 11. The non-airtight weld 11 is an intermittent weld and is only used to connect the hydraulic valve block 2 and the cylinder body 1. No sealing is required. A sealing ring 4 is installed at the matching position of the oil port 3 and the hydraulic valve block 2 to seal the channel a between the oil port 3 and the hydraulic valve block 2 to prevent hydraulic oil leakage.

[0030] Working principle:

[0031] First, the airtight weld 12 is welded, and then a pressure test is performed to verify that there are no welding defects and no oil leakage problems in the airtight weld 12. Then, the sealing ring is installed on the oil port 3, and then the hydraulic valve block 2 is installed and the non-airtight weld 11 is intermittently welded.

[0032] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A hydraulic valve block mounting mechanism, comprising a hydraulic cylinder body (1), a valve block (2), and an oil port (3), characterized in that: The valve block (2) is fixed to the cylinder body (1) by means of intermittent welds (11); the oil port (3) is embedded in the valve block (2) and fixed to the cylinder body (1) by means of an airtight weld (12); a sealing ring (4) is provided between the valve block (2) and the oil port (3).

2. A hydraulic valve block installation mechanism according to claim 1, characterized in that: A first receiving groove (203) and a second receiving groove (202) are sequentially provided along the thickness direction on a side surface of the valve block (2) close to the cylinder body (1); the oil port (3) comprises a base plate (32) and an oil column (31); the base plate (32) is arranged in the first receiving groove (203); the oil column (31) is arranged in the second receiving groove (202); the outer wall of the base plate (32) contacts the cylinder body (1) and is connected to the cylinder body (1) by airtight welding on all sides; the inner wall of the second receiving groove (202) is provided with a third receiving groove (204) for installing the sealing ring (4); the sealing ring (4) is sleeved on the oil column (31).

3. A hydraulic valve block installation mechanism according to claim 2, characterized in that: The first accommodating groove (203) and the second accommodating groove (202) are coaxial, and the diameter of the first accommodating groove (203) is greater than the diameter of the second accommodating groove (202).

4. A hydraulic valve block installation mechanism according to claim 2, characterized in that: The valve block (2) is further provided with an oil hole (201), the oil hole (201) being in communication with the second receiving groove (202), and the diameter of the oil hole (201) being smaller than the diameter of the second receiving groove (202).

5. A hydraulic valve block installation mechanism according to claim 4, characterized in that: A through hole (34) is provided at the center of the oil port (3), and the through hole (34) corresponds to the oil hole (201).

6. A hydraulic valve block installation mechanism according to claim 2, characterized in that: The chassis (32) and the oil column (31) are coaxially arranged, and the diameter of the chassis (32) is greater than the diameter of the oil column (31).

Images