Oil mist quantity control system of rock drill

Abstract

The utility model discloses an oil mist quantity control system of a rock drill. The oil mist quantity control system comprises a lubricating oil pot, an electromagnetic lubricating oil pump and an adjustable throttle valve, the lubricating oil pot is connected with the input end of the electromagnetic lubricating oil pump through a first oil way, and the output end of the electromagnetic lubricating oil pump is provided with a second oil way used for being connected with a rock drill. A third oil way is arranged between the second oil way and the lubricating oil pot, and the adjustable throttling valve is arranged on the third oil way. The lubricating oil supply device is applied to the field of tunnel construction, can supply lubricating oil to the rock drill in a small amount and multiple times, guarantees the continuity of connection of the lubricating oil of the rock drill, avoids dry grinding and accelerated loss of internal parts of the rock drill, can also avoid the problem that the amount of the lubricating oil is too large in a short time, effectively prevents spider patterns from being generated, and improves the working efficiency. The service life of the bit shank is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to an oil mist control system for a rock drill. Background Technology

[0002] In tunnel or mine support engineering, the hydraulic rock drill, a key component of the trolley, is equipped with its own lubrication system. The amount of lubricating oil is provided by the main unit's oil mist system. Different hydraulic rock drills require different amounts of lubricating oil; for example, one rock drill requires 3cc / min of lubricating oil, while another requires 0.6cc / min.

[0003] During the impact process of a rock drill, insufficient lubrication can lead to dry friction of internal parts and accelerated wear. Excessive lubrication, on the other hand, can cause spiderweb-like patterns to appear on the contact surface between the impact piston and the drill bit, significantly reducing the lifespan of the drill bit. The mechanism of spiderweb formation is as follows: the rock drill's impact relies on the repeated striking of the drill bit by the impact piston. When the oil level is appropriate, it is evenly sprayed onto the contact surface between the impact piston and the drill bit under the action of gas. If there is too much oil, it will accumulate in a localized area at the center. During impact, the two end faces strike the accumulated oil under tremendous force, causing the oil to spread outwards. Repeated impacts will create a spiderweb-like pattern on the end faces, spreading outwards from the center.

[0004] Currently, due to technological limitations, there is a lack of electromagnetic lubricating oil pumps with small oil output on the market. Typical models pump 0.2cc of lubricating oil per cycle. To meet the 0.6cc / min requirement of a rock drill, it would only need to pump 3 times per minute, or once every 15 seconds. However, this would lead to discontinuous lubrication, with periods of excessive lubricating oil and periods of insufficient lubricating oil. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides an oil mist control system for rock drills, which can supply lubricating oil in small amounts and multiple times according to the lubricating oil demand of the rock drill. This ensures the continuity of lubricating oil supply to the rock drill while avoiding the problem of excessive lubricating oil supply in a short period of time.

[0006] To achieve the above objectives, this utility model provides an oil mist control system for a rock drill, including a lubricating oil reservoir, an electromagnetic lubricating oil pump, and an adjustable flow valve;

[0007] The lubricating oil reservoir is connected to the input end of the electromagnetic lubricating oil pump via a first oil passage, and the output end of the electromagnetic lubricating oil pump is provided with a second oil passage for connecting to a rock drill.

[0008] A third oil passage is provided between the second oil passage and the lubricating oil reservoir, and the adjustable flow valve is located on the third oil passage.

[0009] In one embodiment, a flow sensor is provided on the second oil line, and the flow sensor is located downstream of the connection point of the third oil line on the second oil line.

[0010] In one embodiment, the lubricating oil reservoir is located above the electromagnetic lubricating oil pump, so that the lubricating oil flows into the electromagnetic lubricating oil pump under the action of gravity.

[0011] In one embodiment, the lubricating oil reservoir has a liquid level sensor.

[0012] In one embodiment, the inlet of the third oil passage on the lubricating oil reservoir is higher than the maximum oil level of the lubricating oil reservoir.

[0013] In one embodiment, the adjustable flow valve includes a valve body and a valve core. The valve body has an oil inlet and an oil outlet at both ends, and the valve body has a flow channel connecting the oil inlet and the oil outlet.

[0014] The valve core is located on the side of the valve body, and the first end of the valve core is located in the flow channel. The second end of the valve core is provided with a driving member for driving the valve core to move and changing the cross-sectional area of ​​the flow channel.

[0015] In one embodiment, the inner wall of the valve body is provided with a first protrusion and a second protrusion, and the first protrusion and the second protrusion form a conical damping hole;

[0016] The first end of the valve core is a tapered structure adapted to the damping orifice, and the first end of the valve core is located inside the damping orifice.

[0017] In one embodiment, a first check valve is provided on the first oil line near the input end of the electromagnetic lubricating oil pump.

[0018] In one embodiment, a second check valve is provided on the second oil line near the output end of the electromagnetic lubricating oil pump.

[0019] In one embodiment, the electromagnetic lubricating oil pump and the adjustable flow valve are equipped with multiple sets for controlling the amount of oil mist from multiple rock drills.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] 1. This utility model adds an adjustable flow valve between the output oil circuit of the electromagnetic lubricating oil pump and the lubricating oil reservoir. By changing the back pressure of the adjustable flow valve, the amount of lubricating oil passing through the adjustable flow valve can be adjusted, thereby changing the actual amount of lubricating oil entering the rock drill. This allows for the supply of lubricating oil to the rock drill in small amounts and multiple times, which not only ensures the continuity of lubricating oil supply to the rock drill and avoids dry friction and accelerated wear of internal parts of the rock drill, but also avoids the problem of excessive lubricating oil in a short period of time, effectively preventing the formation of spider patterns and improving the service life of the drill bit.

[0022] 2. In a preferred embodiment of this utility model, a liquid level sensor can be installed in the lubricating oil reservoir to monitor in real time whether the lubricating oil level in the reservoir is lower than the height threshold. This allows the operator to be reminded to stop the rock drill's impact action in time when the lubricating oil level is lower than the height threshold, thus avoiding dry grinding and accelerated wear of the internal parts of the rock drill.

[0023] 3. In a preferred embodiment of this invention, the inlet position of the third oil circuit on the lubricating oil reservoir can be set higher than the maximum oil level of the lubricating oil reservoir, so that the lubricating oil passing through the adjustable flow valve can be guided back into the lubricating oil tank. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the oil mist control system for a rock drill in an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of the adjustable flow valve in an embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of another embodiment of the oil mist control system for a rock drill in this utility model.

[0028] Reference numerals in the attached figures: 1. Lubricating oil can; 2. Electromagnetic lubricating oil pump; 3. Adjustable flow valve; 301. Valve body; 3011. Oil inlet; 3012. Oil outlet; 3013. Flow channel; 3014. First protrusion; 3015. Second protrusion; 3016. Damping orifice; 302. Valve core; 3021. Drive component; 4. First oil passage; 5. Second oil passage; 6. Tee; 7. Third oil passage; 8. Flow sensor; 9. Liquid level sensor; 10. Rock drill; 11. First check valve; 12. Second check valve.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] like Figure 1The diagram shows an oil mist control system for a rock drill disclosed in this embodiment. It mainly includes a lubricating oil reservoir 1, an electromagnetic lubricating oil pump 2, and an adjustable flow valve 3. The input end of the lubricating oil reservoir 1 and the electromagnetic lubricating oil pump 2 are connected via a first oil passage 4. The output end of the electromagnetic lubricating oil pump 2 is provided with a second oil passage 5 for connecting to the rock drill 10. A three-way valve 6 is provided on the second oil passage 5, and a third oil passage 7 is provided between the three-way valve 6 and the lubricating oil reservoir 1. The adjustable flow valve 3 is located on the third oil passage 7.

[0036] In practical applications, the operation of the rock drill oil mist control system is as follows: After the electromagnetic lubricating oil pump 2 pumps the lubricating oil from the lubricating oil reservoir 1 into the second oil circuit 5, due to the existence of the third oil circuit 7, the hydraulic oil output by the electromagnetic lubricating oil pump 2 is divided into two parts: the first part of the lubricating oil enters the rock drill 10 through the second oil circuit 5, and the second part of the lubricating oil is guided back to the lubricating oil reservoir 1 through the third oil circuit 7. Due to the existence of the adjustable flow valve 3 on the third oil circuit 7, the amount of the second part of the lubricating oil can be changed by adjusting the back pressure of the adjustable flow valve 3. Since the amount of lubricating oil pumped by the electromagnetic lubricating oil pump 2 is fixed each time, the amount of the first part of the lubricating oil can be adjusted at the same time as the amount of the second part of the lubricating oil changes. Therefore, lubricating oil can be supplied to the rock drill 10 in small amounts and multiple times according to the needs of the rock drill 10. This not only ensures the continuity of the lubricating oil supply to the rock drill 10 and avoids dry friction and accelerated wear of the internal parts of the rock drill 10, but also avoids the problem of excessive lubricating oil in a short period of time, effectively preventing spider web formation and improving the service life of the drill.

[0037] In the specific implementation process, a flow sensor 8 is installed on the second oil circuit 5, and the flow sensor 8 is located downstream of the connection of the third oil circuit 7 on the second oil circuit 5. It is used to monitor the real-time lubricating oil input of the rock drill 10, thereby serving as the adjustment feedback of the adjustable flow valve 3 and ensuring the adjustment accuracy of the adjustable flow valve 3.

[0038] In a preferred embodiment, the lubricating oil reservoir 1 is located above the electromagnetic lubricating oil pump 2, so that the lubricating oil in the lubricating oil reservoir 1 can automatically flow into the electromagnetic lubricating oil pump 2 through the first oil passage 4 under the action of gravity.

[0039] In a preferred embodiment, the lubricating oil reservoir 1 is equipped with a liquid level sensor 9, which can monitor in real time whether the lubricating oil level in the lubricating oil reservoir 1 is lower than the height threshold. In this way, when the lubricating oil level is lower than the height threshold, the operator can be reminded to stop the impact action of the rock drill 10 in time, so as to avoid dry grinding and accelerated wear of the internal parts of the rock drill 10.

[0040] In a preferred embodiment, the inlet of the third oil passage 7 on the lubricating oil reservoir 1 is higher than the maximum oil level of the lubricating oil reservoir 1, so that the lubricating oil passing through the adjustable flow valve 3 can be guided back into the lubricating oil tank.

[0041] refer to Figure 2The adjustable flow valve 3 includes a valve body 301 and a valve core 302. The valve body 301 has an oil inlet 3011 and an oil outlet 3012 at its two ends, and a flow channel 3013 connecting the oil inlet 3011 and the oil outlet 3012 within the valve body 301. The valve core 302 is located on the side of the valve body 301, with its first end located within the flow channel 3013. A driving element 3021 is provided at the second end of the valve core 302 for driving the valve core 302 to move and change the cross-sectional area of ​​the flow channel 3013. Specifically, the valve core 302 can be connected to the valve body 301 via a threaded connection, and the driving element 3021 can be a knob or handle, etc., located at the second end of the valve core 302. The inner wall of the valve body 301 is provided with a first protrusion 3014 and a second protrusion 3015, and the first protrusion 3014 and the second protrusion 3015 form a conical damping hole 3016. The first end of the valve core 302 is a conical structure adapted to the damping hole 3016, and the first end of the valve core 302 is located inside the damping hole 3016. In application, by rotating the valve core 302 through the driving component 3021, the feed depth of the first end of the valve core 302 in the damping hole 3016 can be changed, thereby changing the flow area of ​​the damping hole 3016, thereby controlling the generated back pressure and adjusting the amount of lubricating oil passing through the flow channel 3013.

[0042] In the specific implementation process, a first check valve 11 is provided on the first oil circuit 4 near the input end of the electromagnetic lubricating oil pump 2 to prevent the lubricating oil in the electromagnetic lubricating oil pump 2 from flowing back. A second check valve 12 is provided on the second oil circuit 5 near the output end of the electromagnetic lubricating oil pump 2, that is, the second check valve 12 is located between the electromagnetic lubricating oil pump 2 and the three-way valve 6 to prevent the lubricating oil in the second oil circuit 5 from flowing back.

[0043] In practical implementation, multiple sets of electromagnetic lubricating oil pump 2 and adjustable flow valve 3 are provided to control the oil mist volume of multiple rock drills 10. For example... Figure 3 The figure shows another implementation of the rock drill oil mist control system in this embodiment. In this case, two sets of electromagnetic lubricating oil pump 2, adjustable flow valve 3, and flow sensor 8 are provided to supply lubricating oil to the two rock drills 10 respectively.

[0044] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A rock drill oil mist control system, characterized in that, Includes a lubricating oil reservoir, an electromagnetic lubricating oil pump, and an adjustable flow valve; The lubricating oil reservoir is connected to the input end of the electromagnetic lubricating oil pump via a first oil passage, and the output end of the electromagnetic lubricating oil pump is provided with a second oil passage for connecting to a rock drill. A third oil passage is provided between the second oil passage and the lubricating oil reservoir, and the adjustable flow valve is located on the third oil passage.

2. The rock drill oil mist control system according to claim 1, characterized in that, A flow sensor is provided on the second oil line, and the flow sensor is located downstream of the connection point of the third oil line on the second oil line.

3. The rock drill oil mist control system according to claim 1, characterized in that, The lubricating oil reservoir is located above the electromagnetic lubricating oil pump so that the lubricating oil flows into the electromagnetic lubricating oil pump under the action of gravity.

4. The rock drill oil mist control system according to claim 1, characterized in that, The lubricating oil reservoir contains a liquid level sensor.

5. The rock drill oil mist control system according to claim 1, characterized in that, The inlet of the third oil circuit on the lubricating oil reservoir is higher than the maximum oil level of the lubricating oil reservoir.

6. The rock drill oil mist control system according to any one of claims 1 to 5, characterized in that, The adjustable flow valve includes a valve body and a valve core. The valve body has an oil inlet and an oil outlet at both ends, and the valve body has a flow channel connecting the oil inlet and the oil outlet. The valve core is located on the side of the valve body, and the first end of the valve core is located in the flow channel. The second end of the valve core is provided with a driving member for driving the valve core to move and changing the cross-sectional area of ​​the flow channel.

7. The rock drill oil mist control system according to claim 6, characterized in that, The inner wall of the valve body is provided with a first protrusion and a second protrusion, and the first protrusion and the second protrusion form a conical damping hole. The first end of the valve core is a tapered structure adapted to the damping orifice, and the first end of the valve core is located inside the damping orifice.

8. The rock drill oil mist control system according to any one of claims 1 to 5, characterized in that, A first check valve is provided on the first oil line near the input end of the electromagnetic lubricating oil pump.

9. The rock drill oil mist control system according to any one of claims 1 to 5, characterized in that, A second check valve is provided on the second oil line near the output end of the electromagnetic lubricating oil pump.

10. The rock drill oil mist control system according to any one of claims 1 to 5, characterized in that, The electromagnetic lubricating oil pump and the adjustable flow valve are equipped with multiple sets to control the amount of oil mist from multiple rock drills.

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