Rock drill flushing system and rock drill

Abstract

The present application relates to the field of rock drilling equipment, and particularly relates to a rock drill flushing system and a rock drill. The rock drill flushing system comprises a machine head, a drill bit is installed in the machine head, a water jacket is installed on the drill bit, a flushing water cavity is surrounded between the water jacket and the drill bit, the flushing water cavity is communicated with a flushing channel leading to the front end arranged in the drill bit, at least one end outside the flushing water cavity is provided with a water leakage early warning cavity, and the water leakage early warning cavity has a drainage channel leading to the outside of the machine head. In the process of use, when the sealing of the corresponding position of the flushing water cavity fails and leakage occurs, the leaked water will enter the corresponding water leakage early warning cavity and be discharged through the drainage channel, so as to help the staff to find the leakage in time and maintain in time, and thus the problem that the service life of the existing rock drill flushing system is short due to the failure to find the sealing leakage of the flushing head can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rock drilling equipment, in particular to a rock drill flushing system and a rock drill. BACKGROUND

[0002] The hydraulic rock drill is a key equipment for tunneling by drilling and blasting method, and its main components include propulsion, impact, rotation, water flushing, oil mist lubrication, buffer and other systems. The function of the flushing system is mainly to provide flushing water to the front through the drill bit, to remove the debris in the drilling process, to keep the drilling position clean, and to cool the drill bit.

[0003] The flushing system of the hydraulic rock drill is disclosed in the Chinese utility model patent with the authorization announcement No. CN202417298U and the authorization announcement date of September 5, 2021. The system includes a drill bit, a machine head copper sleeve, a machine head, and a flushing head. The machine head copper sleeve is installed in the machine head, the drill bit is installed in the machine head copper sleeve, the flushing head is a sleeved structure, and is installed in the machine head and sealed with the drill bit through a sealing element. In use, the flushing water is delivered to the flushing head through the inner hole of the drill bit, and then sprayed out from the flushing head (water sleeve) to flush the debris in the drilling process of the drill bit, keep the drilling position, and cool the drill bit.

[0004] During the operation of the hydraulic rock drill, the drill bit will reciprocate at a high frequency due to impact, and the sealing element between the two ends of the flushing head and the drill bit is prone to wear and failure, thereby increasing the risk of water leakage into the interior of the rock drill. If the failed sealing element is not replaced in time, it will cause damage to the water jacket and related parts of the rock drill, and long-term drilling under the condition of sealing failure will even cause the entire rock drill to be scrapped prematurely, shortening the service life of the rock drill. SUMMARY

[0005] The present application aims to provide a rock drill flushing system to solve the problem of short service life of the existing rock drill flushing system due to the inability to detect sealing leakage of the flushing head.

[0006] Meanwhile, the present application also aims to provide a rock drill using the above-mentioned rock drill flushing system.

[0007] To solve the above-mentioned problems, the rock drill flushing system of the present application adopts the following technical solution: a rock drill flushing system, including a machine head, a drill bit installed in the machine head, a water jacket installed on the drill bit, a flushing water cavity surrounded between the water jacket and the drill bit, a flushing water channel leading to the front end communicated with the flushing water cavity, and a water leakage warning cavity provided at least at one end outside the flushing water cavity, the water leakage warning cavity having a drainage channel leading out of the machine head.

[0008] Beneficial effects: In the flushing system of the rock drill, a water leakage warning cavity is arranged at least at one end outside the flushing water cavity, and the water leakage warning cavity has a drainage channel leading out of the machine head, so that when the seal at the corresponding position of the flushing water cavity fails and leaks, the leaked water will enter the corresponding water leakage warning cavity and be discharged through the drainage channel, helping the staff to discover the leakage in time and maintain in time, thereby solving the problem of short service life of the existing rock drill flushing system due to the failure to discover the seal leakage of the flushing head.

[0009] Further, a guide sleeve is arranged on the machine head near the front end of the drill bit, the guide sleeve is in sealing cooperation with the drill bit, and the guide sleeve, the machine head and the water jacket together surround the water leakage warning cavity.

[0010] Further, the guide sleeve is in stop cooperation with the step surface arranged in the inner hole of the machine head, and is fixed in the machine head by the water jacket. The guide sleeve is fixed by being pressed into the machine head by the water jacket, which is convenient for fixing the guide sleeve.

[0011] Further, a water storage section is arranged at the rear end of the water jacket, and the water storage section forms the water leakage warning cavity. By arranging the water storage section at the rear end of the water jacket to form the water leakage warning cavity, the water leakage warning cavity can be formed outside the machine head, simplifying the system structure and assembly difficulty.

[0012] Further, sealing members are arranged at both ends of the water storage section and are in sealing cooperation with the drill bit. The sealing members can help form a more airtight sealing cavity.

[0013] Further, a gasket is arranged at the rear end of the water jacket, and a sealing ring is pressed between the end surface of the water jacket and the gasket. The gasket and the sealing ring cooperate to form a secondary seal at the rear end of the water jacket, preventing the leaked water from flowing towards the undesired position.

[0014] Further, the side of the gasket away from the water jacket is pressed and fixed by a tail seat detachably connected to the machine head. The tail seat pressing and fixing mode can facilitate the disassembly of the machine head and other components, and facilitate the replacement of related components such as the sealing members.

[0015] Further, the drainage channel is arranged only at the middle and above the middle of the water leakage warning cavity. This structure can ensure that the system can still work normally for a certain period of time at the initial stage of water leakage (which generally does not damage the system), thereby prolonging the normal working period of the system.

[0016] Further, the water leakage early warning cavity has two or more than two drainage channels. The two or more than two drainage channels can realize rapid drainage and avoid the leaked water from seeping to other positions.

[0017] The rock drill of the present application adopts the following technical scheme: the rock drill comprises a flushing system, the flushing system comprises a machine head, a drill bit is installed in the machine head, a water jacket is installed on the drill bit, a flushing water cavity is surrounded between the water jacket and the drill bit, the flushing water cavity is communicated with a flushing channel leading to the front end arranged in the drill bit, a water leakage early warning cavity is arranged at least at one end outside the flushing water cavity, and the water leakage early warning cavity has a drainage channel leading to the outside of the machine head.

[0018] Beneficial effects: in the rock drill of the present application, the flushing system is provided with a water leakage early warning cavity at least at one end outside the flushing water cavity, and the water leakage early warning cavity has a drainage channel leading to the outside of the machine head, so that when the sealing of the corresponding position of the flushing water cavity fails and leakage occurs during use, the leaked water will enter the corresponding water leakage early warning cavity and be drained through the drainage channel, thereby helping the staff to discover the leakage in time and maintain in time, and thus the problem of short service life of the flushing system of the existing rock drill due to the failure to discover the sealing leakage of the flushing head can be solved.

[0019] Further, a guide sleeve is arranged on the machine head near the front end of the drill bit, the guide sleeve is sealingly matched with the drill bit, and the guide sleeve, the machine head and the water jacket together surround the water leakage early warning cavity. The guide sleeve, the machine head and the water jacket together surround the water leakage early warning cavity, which can simplify the structure of the water leakage early warning cavity and facilitate the formation of the water leakage early warning cavity.

[0020] Further, the guide sleeve is stopper matched with a step surface arranged in the inner hole of the machine head and is fixed in the machine head by the water jacket. The guide sleeve adopts a fixing structure of being pressed and fitted in the machine head by the water jacket, which facilitates the fixation of the guide sleeve.

[0021] Further, a water storage section is arranged at the rear end of the water jacket, and the water storage section forms the water leakage early warning cavity. The water leakage early warning cavity is formed by arranging the water storage section at the rear end of the water jacket, which can realize the formation of the water leakage early warning cavity outside the machine head, simplify the system structure and assembly difficulty.

[0022] Further, sealing members sealingly matched with the drill bit are arranged at both ends of the water storage section. The sealing members can help to form a more airtight sealing cavity.

[0023] Further, a gasket is arranged at the rear end of the water jacket, and a sealing ring is pressed and fitted between the gasket and the end surface of the water jacket. The gasket and the sealing ring cooperate to form a secondary sealing at the rear end of the water jacket, which can prevent the seepage water from flowing towards an undesired position.

[0024] Further, the side of the gasket facing away from the water jacket is fixed by the tailstock which is detachably connected to the head. The tailstock is fixed in such a way that the head and other components can be easily disassembled and replaced, such as the sealing element.

[0025] Further, the at least one of the water leakage early warning cavity is provided with the drainage channel only at the middle and above the middle. Such a structure can ensure that the system can still work normally for a certain period of time (which generally does not damage the system) in the early stage of water leakage, thereby prolonging the normal working period of the system.

[0026] Further, the water leakage early warning cavity is provided with two or more drainage channels. Two or more drainage channels can achieve rapid drainage and avoid the leakage of water to other locations. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the first sectional view of the rock drill flushing system of embodiment 1 of the present application; it is also the first sectional view of the flushing system of embodiment 1 in the rock drill of embodiment 1 of the present application;

[0028] Figure 2 is the second sectional view of the rock drill flushing system of embodiment 1 of the present application; it is also the first sectional view of the flushing system of embodiment 1 in the rock drill of embodiment 1 of the present application;

[0029] Figure 3 is Figure 1 and Figure 2 the front view of the water jacket in

[0030] Figure 4 is the A-A sectional view of Figure 3 .

[0031] In the figure: 101, head; 102, drill tail; 21, flushing water channel; 22, water inlet; 103, guide sleeve; 104, water jacket; 41, water storage section; 105, tailstock; 106, screw; 107, flushing water connector; 108, dustproof ring; 109, outer sealing element; 110, inner sealing element; 111, guide sleeve sealing ring; 112, early warning cavity sealing ring; 113, gasket; 1001, drainage channel; 1002, connector sealing ring. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application, i.e., the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0033] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0034] It should be noted that the relationship terms such as "first" and "second" and the like that can appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between the entities or operations. Moreover, terms such as "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "including a" and the like do not exclude the presence of additional identical elements in the process, method, article or device including the elements.

[0035] The features and performances of the present application will be further described in detail below with reference to the embodiments.

[0036] Embodiment 1 of the rock drill flushing system of the present application:

[0037] As shown in Figures 1-2 , the rock drill flushing system comprises a head 101, a drill bit 102, a guide sleeve 103, a water sleeve 104 and a tail seat 105.

[0038] The structure of the head 101 is shown in Figure 1 and Figure 2 , which is a sleeve structure, and a flushing water inlet is provided on the sleeve wall of one side, and a flushing water connector 107 is fixedly connected on the side provided with the water inlet by a screw 106. When in use, flushing water can be introduced into the head 101 through the flushing water connector 107, and the flushing water enters the drill bit 102 and is discharged from the drill bit 102 to realize flushing of the working surface.

[0039] The structure of the drill bit 102 is also shown in Figure 1and Figure 2 The front end of the shank 102 is provided with a thread for connecting with a drill rod, and the inside of the front end of the shank 102 is provided with a flushing water channel 21, and a water inlet 22 is arranged on the wall at the rear end of the flushing water channel 21. During operation, flushing water enters the shank 102 from the water inlet 22 and is sprayed forward to the working surface through the flushing water channel 21. In order to avoid dust pollution during operation, a dustproof ring 108 is arranged between the front end of the shank 102 and the front end of the machine head 101. The structure of the dustproof ring 108 is a prior art and will not be described here.

[0040] The guide sleeve 103 is a copper sleeve and is installed in the front end of the inner hole of the machine head 101 and is in guiding cooperation with the shank 102. In this embodiment, the front end of the inner hole of the machine head 101 is provided with an annular stop table, and an annular step is arranged on the outer wall of the guide sleeve 103 opposite to the annular stop table. The guide sleeve 103 is installed in the machine head 101 from rear to front, and the cooperation of the annular stop table and the annular step achieves stop, so that the guide sleeve 103 can be fixed by press fitting, that is, the guide sleeve 103 is pressed from the rear end to achieve the fixation relative to the machine head 101.

[0041] The water jacket 104 is located behind the guide sleeve 103, and the outer side surfaces at both ends are respectively provided with outer sealing members 109 between the machine head 101, and the inner side surfaces are respectively provided with inner sealing members 110 between the shank. In order to realize the communication with the flushing water inlet on the machine head 101, an interface is arranged on the wall between the two ends of the water jacket 104, as shown in Figure 2 The interface is directly inserted between the inner end of the flushing water connector 107 and sealed by the connector sealing ring 1002. The two groups of inner sealing members 110 are in sealing cooperation with the shank 102, so as to surround a flushing water cavity. The flushing water connector 107 is directly communicated with the flushing water cavity, and the water inlet of the shank 102 is located in the flushing water cavity.

[0042] The front and rear ends of the flushing water cavity are respectively provided with water leakage warning cavities. When the flushing water cavity leaks, the leaked water will flow into the corresponding water leakage warning cavity. The water leakage warning cavity is provided with a drainage channel. When water enters or the amount of water reaches a certain amount, the water will flow out from the drainage channel, so as to remind the operator that the flushing water cavity has leaked, so that the operator can timely deal with it. Here, the water leakage warning cavity located at the front end of the flushing water cavity is defined as a front warning cavity, and the water leakage warning cavity located at the rear end of the flushing water cavity is defined as a rear warning cavity. From Figure 1 , 2It can be seen that the front early warning cavity is formed by grooving the inner wall of the guide sleeve 103. A guide sleeve sealing ring 111 is arranged between the guide sleeve 103 and the drill bit 102 at the front side wall of the front early warning cavity. The inner wall of the part of the guide sleeve 103 behind the guide sleeve sealing ring 111 is in clearance fit with the drill bit 102 to form a water passing gap. Thus, the guide sleeve 103, together with the machine head 101 and the water jacket 104 (the outer wall surface of the water jacket is sealed with the machine head by an outer sealing member), encloses the front early warning cavity.

[0043] The rear end of the water jacket 104 extends rearward to form a water storage section 41, which constitutes a water leakage early warning cavity at the rear end of the flushing water cavity, i.e., a rear early warning cavity. A rear early warning cavity sealing ring 112 is arranged at the rear side of the rear early warning cavity to form a sealing fit with the drill bit 102. The front end is in communication with the space behind the rear end of the water jacket and behind the inner sealing member. In order to avoid false alarms when the rear end of the water jacket 104 has a slight leakage but the sealing is still effective, as shown in the embodiment, only a drainage passage 1001 is arranged at the middle and above the middle of the rear early warning cavity. When the leaked water fills more than 1 / 2 of the rear early warning cavity, it can flow out in time. The rear end of the water jacket 104 is pressed and fixed by a tail seat 105 which is detachably connected to the machine head 101. A gasket 113 is arranged between the tail seat 105 and the rear end of the water jacket 104. A gasket sealing ring is arranged between the gasket 113 and the rear end surface of the water jacket 104. The outer peripheral surface of the tail seat 105 and the inner wall surface of the machine head 101 are also sealed by a sealing ring. Figures 3-4

[0044] In the process of using the above-mentioned rock drill flushing system, flushing water can be introduced into the water jacket 104 and the drill bit 102 through the flushing water joint 107. Under normal conditions, the flushing water is sealed in the flushing water cavity by the inner sealing members 110 at the front and rear ends of the water jacket 104. When the inner sealing members 110 are worn and leak, the water in the flushing water cavity will flow to the corresponding water leakage early warning cavity through the leakage points of the inner sealing members 110, and then be discharged to the outside of the machine head 101. On the one hand, the damage of the inner sealing members can be found in time. On the other hand, the leaked water flow of the rock drill can be prevented from flowing into the interior of the rock drill, thereby avoiding damage to the rock drill.

[0045] Embodiment 2 of the rock drill flushing system of the present application:

[0046] In the embodiment 1 of the rock drill flushing system of the present application, the front early warning cavity is formed by grooving the inner wall of the guide sleeve. In this embodiment, the front early warning cavity is directly formed by the interval or gap between the rear end surface of the guide sleeve and the front end surface of the water jacket. In this case, the guide sleeve needs to be fixed separately. The fixing method can be that the guide sleeve is threadedly connected with the machine head, or a special compression ring is provided for the guide sleeve. In other embodiments, the front early warning cavity can also be formed by grooving the inner wall of the machine head.

[0047] ​Embodiment 3 of the rock drill flushing system of the present application:

[0048] In Embodiment 1 of the rock drill flushing system of the present application, the rear early warning cavity is formed by setting a water storage section at the rear end of the water jacket. In this embodiment, the rear early warning cavity adopts the same structure as the front early warning cavity.

[0049] Embodiment 4 of the rock drill flushing system of the present application:

[0050] In Embodiment 1 of the rock drill flushing system of the present application, the rear early warning cavity is formed by setting a water storage section at the rear end of the water jacket. In this embodiment, the rear early warning cavity adopts the same structure as the front early warning cavity.

[0051] Embodiment 5 of the rock drill flushing system of the present application:

[0052] In Embodiment 1 of the rock drill flushing system of the present application, the guide sleeve and the water jacket adopt the structure of being pressed and assembled in sequence, which can facilitate the disassembly and replacement of parts. In this embodiment, each part is fixed from the radial direction by screws and other fasteners.

[0053] Embodiment 1 of the rock drill of the present application:

[0054] The rock drill comprises a flushing system, the structure of which is shown in Figure 1 、 2 The structure of the flushing system is the same as that of Embodiment 1 of the rock drill flushing system of the present application, and thus will not be described herein. In other embodiments of the rock drill of the present application, the flushing system can also be the structure of other embodiments of the rock drill of the present application.

Claims

1. A flushing system of a rock drill, comprising a machine head (101) in which a drill bit (102) is mounted, a water jacket (104) being mounted on the drill bit (102), a flushing water cavity being enclosed between the water jacket (104) and the drill bit (102), and the flushing water cavity being communicated with a flushing water passage (21) leading to a front end of the drill bit (102), characterized in that, At least one end of the flushing water cavity, a water leakage warning cavity is arranged, the water leakage warning cavity has a water drainage passage (1001) leading out of the machine head (101); in the up-down direction, at least one of the water leakage warning cavity is arranged at a position only in the middle and above the middle.

2. The rock drill flushing system according to claim 1, characterized in that, The machine head (101) is provided with a guide sleeve (103) near the front end of the shank (102), the guide sleeve (103) is in sealing cooperation with the shank, and the guide sleeve (103) surrounds the water leakage warning cavity together with the machine head and the water jacket (104).

3. The rock drill flushing system according to claim 2, characterized in that, The guide sleeve (103) is in stop cooperation with the step surface arranged in the inner hole of the machine head (101) and is fixed in the machine head by the water jacket (104).

4. The drill rig flushing system of claim 1, wherein, The rear end of the water jacket (104) is provided with a water storage section (41), and the water storage section (41) forms the water leakage warning cavity.

5. The rock drill flushing system according to claim 4, characterized in that, The two ends of the water storage section (41) are respectively provided with sealing elements in sealing cooperation with the shank (102).

6. A rock drill flushing system according to claim 4 or 5, characterized in that, The rear end of the water jacket (104) is provided with a gasket (113), and a sealing ring is arranged between the gasket (113) and the end surface of the water jacket (104).

7. The rock drill flushing system according to claim 6, characterized in that, The side of the gasket (113) away from the water jacket is fixed by being pressed against the tail seat (105) detachably connected with the machine head.

8. The drill rig flushing system of claim 1, wherein, The water leakage warning cavity has two or more water drainage passages (1001).

9. A rock drill comprising a flushing system, characterized in that The flushing system comprises a machine head (101), the machine head (101) is provided with a shank (102), the shank (102) is provided with a water jacket (104), the water jacket (104) and the shank (102) surround a flushing water cavity, and the flushing water cavity is in communication with a flushing water passage (21) leading to the front end arranged in the shank (102), characterized in that at least one end of the flushing water cavity is provided with a water leakage warning cavity, the water leakage warning cavity has a water drainage passage (1001) leading out of the machine head (101); in the up-down direction, at least one of the water leakage warning cavity is arranged at a position only in the middle and above the middle.

10. The rock drill according to claim 9, characterized in that The machine head (101) is provided with a guide sleeve (103) near the front end of the shank (102), the guide sleeve (103) is in sealing cooperation with the shank, and the guide sleeve (103) surrounds the water leakage warning cavity together with the machine head and the water jacket (104).

11. A rock drill according to claim 10, characterized in that The guide sleeve (103) is in stop cooperation with the step surface arranged in the inner hole of the machine head (101) and is fixed in the machine head by the water jacket (104).

12. The rock drill according to claim 9, characterized in that The rear end of the water jacket (104) is provided with a water storage section (41), and the water storage section (41) forms the water leakage warning cavity.

13. The rock drill according to claim 12, characterized in that The two ends of the water storage section (41) are respectively provided with sealing elements in sealing cooperation with the shank (102).

14. A rock drill according to claim 12 or 13, characterized in that The rear end of the water jacket (104) is provided with a gasket (113), and a sealing ring is arranged between the gasket (113) and the end surface of the water jacket (104).

15. The rock drill according to claim 14, characterized in that The side of the gasket (113) away from the water jacket is fixed by being pressed against the tail seat (105) detachably connected with the machine head.

16. The rock drill according to claim 9, characterized in that The water leakage warning cavity has two or more water drainage passages (1001).

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