Shell assembly for oil return energy accumulator of hydraulic rock drill
By opening a straight hole in the housing assembly of the hydraulic rock drilling machine oil recharge accumulator, the problem of damage to the diaphragm due to excessive stress at the observation hole position is solved, the failure rate and maintenance cost are reduced, and the working efficiency is improved.
Patent Information
- Application Number
- CN202421011837.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The diaphragm of the hydraulic rock drilling machine oil return accumulator is frequently damaged, resulting in bursting of oil return pipelines and increasing noise. The main reason is that the aperture of the observation hole is too large, which causes the diaphragm to be subjected to too much force at the observation hole position during movement, increasing the chance of damage.
A housing assembly for hydraulic rock drilling machine oil recharge accumulator was designed, and a straight hole was opened below the original screw plug hole. The hole diameter of the straight hole is one-fifth of the screw plug hole diameter, reducing the stress point of the diaphragm during movement and reducing the possibility of impurities entering.
By reducing the force point of the diaphragm during movement and reducing the possibility of impurities entering, the failure rate of the oil return accumulator is significantly reduced, the maintenance cost is reduced, and the operating efficiency of the rock drilling trolley is improved.
Smart Images
Figure CN222811001U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic rock drill equipment, in particular to a shell assembly for an oil return accumulator of a hydraulic rock drill. Background Art
[0002] The working principle of the oil return accumulator is that when the high-pressure oil returns through the rock drill through the oil return accumulator, the air between the diaphragm and the valve body is squeezed to buffer the instantaneous high pressure generated by the return oil of the hydraulic system, which plays a role in buffering and eliminating pulsation, reducing the average pressure and pressure fluctuation of the return oil pipeline, protecting the oil return system pipeline and the rock drill plunger pump, and reducing the noise of the rock drill;
[0003] The hydraulic rock drill oil return accumulator belongs to the straight-through airbag accumulator, which is mainly composed of valve body, valve core, diaphragm and observation port bolts. The diaphragm is installed between the valve body and the valve core. A φ10mm observation hole is set on the valve body, which mainly plays the role of checking whether the diaphragm is damaged or leaking oil. The observation hole is blocked with M10 bolts to prevent impurities and dust from entering the valve body and damaging the diaphragm. The bolts must be tightened during normal use. When checking the diaphragm daily, remove the bolts to check the diaphragm;
[0004] During the use of the rock drill, the rock drill return oil pipeline frequently bursts and the rock drill noise increases. After inspection, the main reason is that the diaphragm of the return oil accumulator is damaged. After analysis and calculation, it is found that the aperture of the observation hole is too large. During use, the diaphragm is affected by the hydraulic oil in the cylinder body and will continue to expand and contract. Therefore, the diaphragm constantly presses against the position of the observation hole. The diaphragm is subjected to greater force at the observation hole position, which accelerates the probability of the diaphragm being cut and damaged, resulting in frequent damage to the diaphragm. For this reason, we propose a shell assembly for the return oil accumulator of a hydraulic rock drill. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a shell assembly for an oil return accumulator of a hydraulic rock drill, which reduces the failure rate of the oil return accumulator, reduces maintenance costs, and improves the operating efficiency of the rock drilling trolley, and can effectively solve the problems in the background technology.
[0006] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:
[0007] A housing assembly for an oil return accumulator of a hydraulic rock drill comprises an oil return accumulator housing body, a screw plug hole and a straight hole are provided on a cylinder body in the middle of the oil return accumulator housing body, the central axes of the screw plug hole and the straight hole are on the same straight line, the straight hole is arranged below the screw plug hole, the screw plug hole is connected to the inner side of the cylinder body through the straight hole, a screw plug is threadedly connected to the screw plug hole, and the diameter of the straight hole is one fifth of the diameter of the screw plug hole.
[0008] Furthermore, the corner edges of the spiral sleeve on the oil return accumulator housing body are of a rounded structure.
[0009] Furthermore, a flat platform is provided on the cylinder body in the middle of the oil return accumulator housing body.
[0010] Furthermore, the port of the screw plugging hole is arranged on the flat platform.
[0011] Furthermore, the bottom of the screw plug extends into the inner side of the straight hole and is plugged into the straight hole.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the shell assembly for the oil return accumulator of the hydraulic rock drill has the following advantages: a straight hole is opened below the original screw plug hole, the aperture of the original screw plug hole is 10 mm, the aperture of the straight hole is one-fifth of the aperture of the screw plug hole, and the aperture of the straight hole is 2 mm, the diaphragm will not be damaged by pressing on the screw plug hole during continuous movement, and the 2 mm straight hole basically does not have the possibility of large particles of impurities entering the diaphragm, thereby reducing the failure rate of the oil return accumulator, reducing maintenance costs, and improving the operating efficiency of the rock drilling trolley. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0014] Figure 2 It is a schematic diagram of the enlarged structure of point A of the utility model;
[0015] Figure 3 It is a schematic diagram of the partial structure of the cylinder body of the utility model;
[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the cylinder body of the utility model;
[0017] Figure 5 It is a schematic diagram of the structure of the existing oil return accumulator housing assembly;
[0018] Figure 6 The figure is a schematic diagram of the cylinder structure of an existing oil return accumulator housing assembly.
[0019] In the figure: 1 oil return accumulator housing body, 2 spiral sleeve, 3 cylinder body, 4 screw plug, 5 straight hole, 6 flat platform, 7 screw plug hole. DETAILED DESCRIPTION
[0020] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.
[0021] See also Figure 1-6The present embodiment provides a technical solution: a housing assembly for an oil return accumulator of a hydraulic rock drill, comprising an oil return accumulator housing body 1, a screw plug hole 7 and a straight hole 5 are provided on a cylinder body 3 in the middle of the oil return accumulator housing body 1, the central axes of the screw plug hole 7 and the straight hole 5 are on the same straight line, the straight hole 5 is arranged below the screw plug hole 7, the screw plug hole 7 is connected to the inner side of the cylinder body 3 through the straight hole 5, a screw plug 4 is threadedly connected to the screw plug hole 7, and the diameter of the straight hole 5 is one fifth of the diameter of the screw plug hole 7 A straight hole 5 is opened below the original screw plug hole 7. The diameter of the original screw plug hole 7 is 10 mm, and the diameter of the straight hole 5 is one-fifth of the diameter of the screw plug hole 7, and the diameter of the straight hole 5 is 2 mm. The diaphragm is in constant motion and will not be damaged by pressing on the screw plug hole 7. The 2 mm straight hole 5 basically does not have the possibility of large particles of impurities entering the diaphragm, thereby reducing the failure rate of the return oil accumulator, reducing maintenance costs, and improving the operating efficiency of the rock drilling rig.
[0022] The corners of the spiral sleeve 2 on the oil return accumulator housing body 1 are of a rounded structure. The original corners were of a right-angle structure and were easily broken and damaged. Now the rounded structure is not easy to break and damage.
[0023] A flat platform 6 is provided on the cylinder body 3 in the middle of the return oil accumulator housing body 1, and the port of the screw plug hole 7 is set on the flat platform 6. The original structure is a boss with high processing cost. After being changed to a flat platform 6, it is easier to mill, thereby reducing the processing cost.
[0024] The bottom of the screw plug 4 extends into the inner side of the straight hole 5 and is plugged with the straight hole 5, thereby cooperating with the improved shell hole, thereby achieving a better blocking effect.
[0025] The working principle of a housing assembly for an oil return accumulator for a hydraulic rock drill provided by the utility model is as follows: a straight hole 5 is opened below an original screw plug hole 7, the aperture of the original screw plug hole 7 is 10 mm, the aperture of the straight hole 5 is one-fifth of the aperture of the screw plug hole 7, and the aperture of the straight hole 5 is 2 mm, the diaphragm is constantly moving and will not be damaged by pressing on the screw plug hole 7, and the 2 mm straight hole 5 basically does not have the possibility of large particles of impurities entering the diaphragm, the edges and corners of the spiral sleeve 2 on the housing body 1 of the oil return accumulator are rounded structures, the original edges and corners are right-angle structures, which are easy to break and damage, and now the rounded structures are not easy to break and damage, a flat platform 6 is provided on the cylinder body 3 in the middle of the housing body 1 of the oil return accumulator, the original structure is a boss, and the processing cost is high, and after being changed to the flat platform 6, it is easier to mill, thereby reducing the processing cost.
[0026] It is worth noting that the components disclosed in the above embodiments are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods. In use, the service life of the accumulator housing with a 2mm aperture is statistically 1900 hours on average, which is about 1300 hours longer than the service life of the original 10mm aperture of more than 600 hours. At the same time, the monthly failure rate of the rock drill is reduced to about 2%, and the maintenance cost is also reduced to 1500-2000 yuan / month, which has a good effect in reducing costs and improving the operating rate of the rock drilling trolley.
[0027] The parts of the present invention that are not described in detail are prior art. Although the present invention is specifically demonstrated and introduced in conjunction with the preferred implementation scheme, there are many methods and ways to implement the technical solution. The above is only a preferred implementation scheme of the present invention. However, technical personnel in the relevant field should understand that various changes can be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined in the attached claims, which are all within the scope of protection of the present invention.
Claims
1. A housing assembly for an oil return accumulator of a hydraulic rock drill, comprising an oil return accumulator housing body (1), characterized in that: A screw plug hole (7) and a straight hole (5) are provided on the cylinder body (3) in the middle of the oil return accumulator housing body (1); the central axes of the screw plug hole (7) and the straight hole (5) are on the same straight line; the straight hole (5) is arranged below the screw plug hole (7); the screw plug hole (7) is connected to the inner side of the cylinder body (3) through the straight hole (5); a screw plug (4) is threadedly connected to the screw plug hole (7); and the diameter of the straight hole (5) is one fifth of the diameter of the screw plug hole (7).
2. A housing assembly for an oil return accumulator of a hydraulic rock drill according to claim 1, characterized in that: The corner edges of the spiral sleeve (2) on the oil return accumulator housing body (1) are of a rounded structure.
3. A housing assembly for an oil return accumulator of a hydraulic rock drill according to claim 1, characterized in that: A flat platform (6) is provided on the cylinder body (3) in the middle of the oil return accumulator housing body (1).
4. A housing assembly for an oil return accumulator of a hydraulic rock drill according to claim 3, characterized in that: The end of the screw plug hole (7) is arranged on the flat platform (6).
5. A housing assembly for an oil return accumulator of a hydraulic rock drill according to claim 1, characterized in that: The bottom of the screw plug (4) extends into the inner side of the straight hole (5) and is plugged into the straight hole (5).