A deep hole wall dust spiral cleaning device for blast hole

Abstract

The present application relates to the field of dust cleaning, especially to a spiral hole-wall dust cleaning device for deep blast hole, which comprises an operating handle, a telescopic main rod, a spiral cleaning unit, a dust collecting bin and a negative pressure device, the telescopic main rod is installed on the operating handle, the operating handle is connected with the dust collecting bin, the negative pressure device is connected with the dust collecting bin to provide negative pressure, the collecting holes on the spiral cleaning unit suck dust into the dust collecting bin through the telescopic main rod and the operating handle, the spiral cleaning unit comprises a cleaning head with a brush and a connecting head, has a cavity inside and is communicated with the dust collecting bin, the cleaning head has spiral blades inside, the telescopic main rod can be adjusted in length, the dust collecting bin is in the shape of a conical funnel and has a filter screen between the dust collecting bin and the negative pressure device, and the spiral cleaning unit has a vibrating element. The present application can effectively clean dust on the hole wall of deep blast hole, can flexibly adjust the cleaning depth, and can effectively collect and filter dust.

Description

Technical Field

[0001] This invention relates to the field of dust cleaning technology, specifically a spiral cleaning device for deep borehole walls. Background Technology

[0002] In the field of mining blasting auxiliary equipment technology, the cleaning of borehole walls is crucial. During blasting tests or various engineering operations, sensors need to be reliably attached to the borehole wall to obtain accurate blasting pressure monitoring data. If dust residue remains on the borehole wall, it will directly affect the reliability of the sensor attachment, leading to deviations in the blasting pressure monitoring data. This has a significant impact on the accuracy and safety assessment of blasting operations. With the continuous development of mining blasting engineering, the requirements for borehole wall cleaning are also increasing. How to efficiently and accurately clean dust from borehole walls has become an urgent problem to be solved.

[0003] Prior to this technological solution, the industry conventionally employed two main methods to address dust removal from blast hole walls. One method involved using a mechanical bucket, primarily for cleaning large debris pieces, which worked by mechanically scooping them out of the blast hole. The other method used a high-pressure air gun, employing high-pressure airflow to blow dust out of the blast hole. Additionally, traditional brush devices were also commonly used, cleaning dust through friction between the brush and the hole wall. These methods were effective in cleaning dust from blast hole walls to some extent and played a role in past mining blasting operations.

[0004] However, these existing conventional methods have many drawbacks. High-pressure air guns are prone to secondary dust adhesion during use, and the airflow weakens significantly during deep hole cleaning, greatly reducing the cleaning effect. Traditional brush devices lack a dust collection structure, leaving dust trapped inside the hole after cleaning. Furthermore, these existing methods cannot meet the refined cleaning needs of boreholes at different depths, especially in terms of dust removal at hole corners, failing to meet the cleanliness requirements of modern mining blasting operations. Summary of the Invention

[0005] This invention provides a spiral cleaning device for deep borehole wall dust, which aims to overcome the borehole wall cleaning problem mentioned in the background art.

[0006] The present invention provides the following technical solution to achieve the above objectives: The purpose of this invention is to overcome the above-mentioned technical problems and provide a spiral cleaning device for dust removal from deep borehole walls. A spiral cleaning device for deep borehole wall dust includes an operating handle, a telescopic main rod, a spiral cleaning unit, a dust collection chamber, and a negative pressure device. The telescopic main rod is mounted on the operating handle, and the dust collection chamber is connected to the operating handle. The negative pressure device is connected to the dust collection chamber and provides negative pressure. The spiral cleaning unit has a collection hole, and the dust is drawn into the dust collection chamber through the telescopic main rod and the operating handle.

[0007] By adopting the above technical solution, the device can use the collection hole to suck the dust from the deep borehole wall into the dust collection chamber through the telescopic main rod and operating handle under the negative pressure provided by the negative pressure device, thereby effectively cleaning the borehole wall dust and avoiding dust residue from affecting the reliability of sensor bonding and causing deviation in blast pressure monitoring data.

[0008] Preferably, the spiral cleaning unit includes a cleaning head and a connecting head, the connecting head and the cleaning head are integrally formed, the connecting head is rotatably connected to the telescopic main rod, both the connecting head and the cleaning head have cavities inside, the cavities are connected to the dust collection chamber through the telescopic main rod, the collection hole is opened on the cleaning head, and the cleaning head is also provided with a brush for cleaning dust.

[0009] By adopting the above technical solution, the brush set on the cleaning head can clean the dust on the deep hole wall of the blast hole. The cleaning head and the connecting head are integrated and have an internal cavity. The collection hole is opened on the cleaning head. The cavity is connected to the dust collection chamber through the telescopic main rod. The cleaned dust can be sucked into the dust collection chamber through the collection hole and the telescopic main rod to avoid secondary dust adhesion. The connecting head and the telescopic main rod are rotatably connected, which can realize the rotation cleaning of the cleaning head.

[0010] Preferably, the cavity of the cleaning head is provided with spiral blades, and the collection holes are provided between the spiral blades.

[0011] By adopting the above technical solution, the spiral cleaning unit includes a connector that is rotatably connected to the telescopic main rod and an integrally set cleaning head. The cleaning head is equipped with a brush for cleaning dust, a cavity and a collection hole. Spiral blades are set inside the cavity of the cleaning head and the collection hole is set between the spiral blades. With the negative pressure provided by the negative pressure device, the spiral blades can better draw dust from the collection hole into the dust collection chamber through the telescopic main rod and the operating handle when the cleaning head rotates, thereby enhancing the dust collection effect.

[0012] Preferably, the telescopic main rod includes an end tube and at least one sleeve, the end tube and the sleeve are nested and slidably connected, the spiral cleaning unit is installed at the end of the end tube away from the operating handle, and the sleeve is fixed to the operating handle.

[0013] By adopting the above technical solution, the end tube and sleeve of the telescopic main rod are nested and slidably connected, making the telescopic main rod telescopic and adjustable in length according to the depth of the blast hole, so as to meet the fine cleaning needs of blast holes of different depths; the spiral cleaning unit is installed at the end of the end tube away from the operating handle, and in conjunction with the telescopic main rod, the spiral cleaning unit can be accurately delivered to the target position in the blast hole for dust cleaning.

[0014] Preferably, an adjusting rod is fixedly installed inside the end tube, and the adjusting rod passes through the sleeve, extends out of the operating handle, and is slidably connected to the operating handle.

[0015] By adopting the above technical solution, the telescopic main rod adopts an inner and outer nested sliding connection of the end tube and the sleeve, and the adjusting rod is fixed inside the end tube. The adjusting rod passes through the sleeve and out of the operating handle and is slidably connected to it, which can realize the length adjustment of the telescopic main rod, meet the fine cleaning needs of blast holes of different depths, and has high positioning accuracy, which can accurately control the cleaning position.

[0016] Preferably, the dust collection chamber is in the shape of a conical funnel, and the edge of the conical opening of the dust collection chamber is connected to the operating handle, and the top center of the dust collection chamber is connected to the negative pressure device.

[0017] By adopting the above technical solution, the device includes an operating handle, a telescopic main rod, a spiral cleaning unit, a dust collection chamber, and a negative pressure device. The telescopic main rod is installed on the operating handle, which is connected to the dust collection chamber. The negative pressure device is connected to the dust collection chamber and provides negative pressure. The collection hole of the spiral cleaning unit draws dust into the dust collection chamber through the telescopic main rod and the operating handle. At the same time, the dust collection chamber is shaped like a conical funnel, with its conical opening edge connected to the operating handle and its central top position connected to the negative pressure device. This allows the conical opening to fit against the hole wall to form a sealing zone when the device is inserted into the hole. The local negative pressure generated by the negative pressure device can more effectively draw the dust that has been vibrated off into the collection chamber in real time.

[0018] Preferably, a filter screen is provided between the dust collection chamber and the negative pressure device.

[0019] By adopting the above technical solution, a filter screen is installed between the dust collection chamber and the negative pressure device to prevent dust from entering the negative pressure device and avoid dust clogging the pump body.

[0020] Preferably, the spiral cleaning unit is equipped with a vibrating element, which is a motor, and the operating handle is equipped with a start switch to activate the vibrating element.

[0021] By adopting the above technical solution, including an operating handle, a telescopic main rod, a spiral cleaning unit, a dust collection chamber, and a negative pressure device, the telescopic main rod is installed on the operating handle, which is connected to the dust collection chamber. The negative pressure device is connected to the dust collection chamber to provide negative pressure. The spiral cleaning unit has a collection hole, and dust is sucked into the dust collection chamber through the telescopic main rod and the operating handle. At the same time, a motor is installed on the spiral cleaning unit as a vibrating component, and the operating handle is equipped with a start switch to activate the vibrating component. After the motor is started, it can use high-frequency vibration to detach the dust from the hole wall and, together with the spiral cleaning unit, push the dust along the hole wall towards the hole opening to the collection chamber, thereby achieving effective cleaning of dust on the deep hole wall and preventing secondary dust adhesion.

[0022] Preferably, a movable structure is provided between the end tube and the connector, which replaces the vibrating element (vibration motor). The movable structure includes an undulating surface opened in the end tube and a movable surface provided in the connector that matches the undulating surface. The movable surface matches the undulating surface. During the negative pressure adsorption process, the air drives the connector to rotate, causing the dust on the hole wall to detach from the adhesion surface.

[0023] Preferably, a spring is provided between the end tube and the connector on the side opposite to the undulating surface, and an abutment bearing is provided between the spring and the connector. The spring pushes the movable surface of the connector to fit against the undulating surface. During the rotation of the connector, the cleaning head can float up and down through the undulating surface, thereby preventing dust from adhering to one position. At the same time, the up-and-down undulating cleaning head can clean the cleaning position from different angles during the cleaning process, thereby improving the cleaning effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Cross-sectional view of AA; Figure 3 This is a structural diagram showing the connection between the connector and the end pipe. Figure 4 for Figure 3 Enlarged view at point B in the middle; Figure 5 This is a structural diagram of the undulating surface of the end pipe; Reference numerals: 1. Operating handle; 2. Telescopic main rod; 21. End tube; 22. Sleeve; 23. Adjusting rod; 24. Undulated surface; 3. Spiral cleaning unit; 31. Cleaning head; 32. Connecting head; 33. Brush; 34. Spiral blade; 35. Collection hole; 36. Moving surface; 37. Ball bearing; 4. Dust collection chamber; 5. Negative pressure device; 6. Filter screen; 7. Vibrating element; 81. Spring; 82. Abutment bearing. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0026] This invention mainly adopts a scheme of "a combination of a telescopic spiral rod, a vibrating brush 33 and negative pressure collection", which achieves the effect of effectively cleaning dust in the deep borehole wall, avoiding secondary adhesion and adapting to the cleaning needs of boreholes at different depths. The following is a further detailed description of this invention.

[0027] Example 1: The spiral cleaning device for deep borehole wall dust provided in this embodiment of the invention, referring to... Figure 1 and Figure 2 The system includes an operating handle, a telescopic main rod 2, a spiral cleaning unit 3, a dust collection chamber 4, and a negative pressure device 5. The telescopic main rod 2 is mounted on the operating handle, which is connected to the dust collection chamber 4. The negative pressure device 5 is connected to the dust collection chamber 4 and provides negative pressure. The spiral cleaning unit 3 has a collection hole 35. The collection hole 35 draws dust into the dust collection chamber 4 through the telescopic main rod 2 and the operating handle, effectively collecting the dust generated during the cleaning process and preventing the dust from adhering to the borehole wall again. This is because the negative pressure generated by the negative pressure device 5 can form a dust collection channel through the collection hole 35, the telescopic main rod 2, and the operating handle, promptly drawing the cleaned dust into the dust collection chamber 4.

[0028] Specifically, the operating handle integrates multiple control functions and is made of non-slip rubber. This non-slip rubber material provides excellent grip, ensuring operators can maintain a stable hold even in wet working environments, preventing slippage and ensuring smooth operation. The control functions on the operating handle can be replaced with other structures offering similar control, such as a touchscreen control panel. The telescopic control knob, vibration switch, and negative pressure pump start / stop button on the operating handle allow for convenient control of the device's telescopic, vibration, and negative pressure functions.

[0029] The telescopic main rod 2 includes an end tube 21 and at least one sleeve 22. The end tube 21 and sleeve 22 are nested and slidably connected. The spiral cleaning unit 3 is installed at the end of the end tube 21 away from the operating handle, and the sleeve 22 is fixed to the operating handle. The end tube 21 and sleeve 22 adopt a high-strength aluminum alloy nested structure. The high-strength aluminum alloy material ensures the strength of the telescopic main rod 2 while reducing the overall weight and facilitating operation. An adjusting rod 23 is fixedly installed inside the end tube 21. The adjusting rod 23 passes through the sleeve 22, exits the operating handle, and is slidably connected to the operating handle. The adjusting rod 23 can be rotated by rotating the knob on the operating handle to drive the internal gear set to extend and retract the sleeve 22, thereby adjusting the length of the telescopic main rod 2. The adjusting rod 23 can also be electrically driven to achieve extension and retraction, thereby improving the accuracy and convenience of adjustment. The telescopic main rod 2 has built-in wires to power the vibration motor and negative pressure pump. The wires are made of materials with good insulation properties to ensure safe and stable power supply.

[0030] The spiral cleaning unit 3 includes a cleaning head 31 and a connecting head 32. The connecting head 32 is integrally formed with the cleaning head 31 and is rotatably connected to the telescopic main rod 2. Both the connecting head 32 and the cleaning head 31 have cavities inside, which are connected to the dust collection chamber 4 via the telescopic main rod 2. A collection hole 35 is formed on the cleaning head 31, which is also equipped with a brush 33 for cleaning dust. Spiral blades 34 are arranged inside the cavity of the cleaning head 31, and collection holes 35 are arranged between the spiral blades 34. The base of the brush 33 is elastic steel wire, and the surface is covered with wear-resistant nylon bristles. This structure gives the brush 33 both elasticity, allowing it to better conform to the hole wall, and good wear resistance, extending the service life of the brush 33. The spiral blades 34 allow the dust to be better guided to the collection holes 35 when the cleaning head 31 rotates. The spiral blades 34 can also adopt different spiral angles or shapes to adapt to different cleaning needs. The integrated design of the cleaning head 31 and the connector 32 ensures the stability of the structure. At the same time, the rotating connection can rotate with the telescopic main rod 2, generating a pushing force outward from the hole, pushing the dust along the hole wall towards the hole opening.

[0031] The dust collection chamber 4 is shaped like a conical funnel, with the edge of its conical opening connected to the operating handle. The top center of the dust collection chamber 4 is connected to the negative pressure device 5. This conical funnel design makes it easier for dust to accumulate inside the chamber, facilitating collection. A flexible sealing strip is installed at the edge of the chamber opening, which forms a localized negative pressure chamber when it contacts the wall of the opening, improving dust collection efficiency. The flexible sealing strip can be made of materials with good sealing properties, such as rubber. A filter screen 6 is installed between the dust collection chamber 4 and the negative pressure device 5. The filter screen 6 has a small pore size, preventing dust from entering the negative pressure device 5 and clogging the pump. The filter screen 6 can be made of different materials, such as metal or fiber mesh.

[0032] The implementation principle of this embodiment is as follows: This device combines the functions of a telescopic spiral rod, a vibrating brush 33, and negative pressure collection. The length of the telescopic main rod 2, the vibration of the spiral cleaning unit 3, and the start / stop of the negative pressure device 5 can be easily controlled via an operating handle. The adjustable length of the telescopic main rod 2 allows the device to adapt to boreholes of different depths, meeting the needs of fine cleaning. The rotation and vibration functions of the spiral cleaning unit 3 effectively clean dust from the borehole wall, especially at the corners. Simultaneously, the negative pressure generated by the negative pressure device 5 draws dust into the dust collection chamber 4 through the collection hole 35, preventing secondary dust adhesion and improving the dust cleaning effect on the deep borehole walls. Compared to existing technologies, this device overcomes problems such as high-pressure air gun wind attenuation, the lack of a dust collection structure in traditional brush 33 devices, and the inability to adapt to boreholes of different depths, demonstrating greater practicality and innovation.

[0033] Example 2: Reference Figures 3-5 A movable structure is provided between the end tube 21 and the connector 32, which replaces the vibrating element 7 (vibration motor). The movable structure includes an undulating surface 24 opened in the end tube 21 and a movable surface 36 provided in the connector 32 that matches the undulating surface 24. The movable surface 36 matches the undulating surface 24. During the negative pressure adsorption process, the connector 32 is rotated by air.

[0034] Achieving rotation of the connector is not easy; the force required for the connector 32 to rotate must be greater than the various resistances it encounters during rotation. These resistances include the resistance between the undulating and moving surfaces during rotation, the resistance of the brush, and the inherent resistance of the system itself during rotation. Specifically, the following conditions must be met: It should be noted that the left side of the formula represents the torque generated by negative pressure adsorption, the first formula on the right side represents the resistance between the combined structure of the undulating surface and the moving surface, the second formula represents the resistance between the brush and the wall, and the third formula represents the damping resistance of the rotating head.

[0035] Where, n is the number of collecting holes 35, ΔP is the air pressure difference between the inside and outside of the connector 32, d is the diameter of the collecting hole, mainly for calculating the Ajet value, Ajet refers to the area of ​​the collecting hole, R is the average radius of rotation (the distance from the center of the inclined hole to the axis of rotation of the connector), θ is the angle between the axis of the collecting hole 35 and the axis of the connector (generally 30-60°), η is the airflow efficiency factor (which needs to be calculated according to the site environment, and is 1 in an ideal environment), μu is the friction coefficient between the undulating surface and the moving surface (including the ball), Fspring is the contact preload provided by the spring (N), Ru is the average radius of the contact point of the undulating surface (m), and f (Nu,λ) is a geometric function related to the number of wave crests Nu and wavelength λ of the undulating surface (usually >1), representing the additional friction path due to the up-and-down undulations, μb is the friction coefficient between the brush and the borehole wall, Fcontact is the radial contact pressure (N) between the brush and the borehole wall, Rb is the average radius (m) of the brush contact point, approximately equal to the borehole radius, C is the rotational damping coefficient (N·m·s), mainly from the viscous friction of the bearings, etc., and ω is the angular velocity of the system rotation (rad / s).

[0036] Under the above conditions, the connector can rotate. During the sliding process, the end tube 21 and connector 32 undulate along their central axis. Ball bearings 37 are provided on the movable surface 36 to reduce friction between it and the undulating surface 24. A spring 81 is provided between the end tube 21 and the connector 32 on the opposite side of the undulating surface 24. A bearing 82 is provided between the spring 81 and the connector 32. The spring 81 pushes the movable surface 36 of the connector 32 to fit against the undulating surface 24. During the rotation of the connector 32, the cleaning head 31 floats up and down through the undulating surface 24, preventing dust from adhering to one position. The undulating cleaning head 31 allows for cleaning from different angles during the cleaning process, resulting in better cleaning performance.

[0037] To verify the rationality of the above design, the following specific experiment was conducted: With a borehole diameter of 72mm, the test was conducted after adjusting the parameters as required. The test parameters are as follows: The results of the experiments are summarized below: The test results show that, according to the design conditions of this invention, the connector can be effectively rotated, ensuring dust collection efficiency.

[0038] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A spiral cleaning device for dust removal from deep borehole walls, characterized in that: It includes an operating handle (1), a telescopic main rod (2), a spiral cleaning unit (3), a dust collection chamber (4), and a negative pressure device (5); the spiral cleaning unit (3) is connected, the telescopic main rod (2) is installed on the operating handle (1), the dust collection chamber (4) is connected to the operating handle (1), and the dust collection chamber (4) is connected to the negative pressure device (5); the spiral cleaning unit (3) is provided with a collection hole (35); the negative pressure device (5) provides negative pressure, and the dust is sucked into the dust collection chamber (4) in sequence through the collection hole (35), the telescopic main rod (2), and the operating handle (1).

2. The spiral cleaning device for deep borehole wall dust according to claim 1, characterized in that: The spiral cleaning unit (3) includes a cleaning head (31) and a connecting head (32); the connecting head (32) and the cleaning head (31) are integrally formed; the connecting head (32) is rotatably connected to the telescopic main rod (2); both the connecting head (32) and the cleaning head (31) are provided with cavities, and the cavities are connected to the dust collection chamber (4) through the telescopic main rod (2); the collection hole (35) is opened on the cleaning head (31); the cleaning head (31) is also provided with a brush (33) for cleaning dust.

3. The spiral cleaning device for deep borehole wall dust according to claim 2, characterized in that: The cleaning head (31) has a spiral blade (34) inside its cavity, and the collection hole (35) is provided between the spiral blades (34).

4. The spiral cleaning device for deep borehole wall dust according to claim 2, characterized in that: The telescopic main rod (2) includes an end tube (21) and a sleeve (22), with the end tube (21) and the sleeve (22) being nested and slidably connected; the sleeve (22) is fixed on the operating handle (1); the spiral cleaning unit (3) is installed at the end of the end tube (21) away from the operating handle (1).

5. The spiral cleaning device for deep borehole wall dust according to claim 4, characterized in that: An adjusting rod (23) is fixedly installed inside the end tube (21). The adjusting rod (23) passes through the sleeve (22), exits the operating handle (1), and is slidably connected to the operating handle (1).

6. The spiral cleaning device for deep borehole wall dust according to claim 1, characterized in that: The dust collection chamber (4) is in the shape of a cone-shaped funnel, and the edge of the cone-shaped opening of the dust collection chamber (4) is connected to the operating handle (1); the top center of the dust collection chamber (4) is connected to the negative pressure device (5).

7. The spiral cleaning device for deep borehole wall dust according to claim 1, characterized in that: A filter screen (6) is provided between the dust collection chamber (4) and the negative pressure device (5).

8. The spiral cleaning device for deep borehole wall dust according to claim 1, characterized in that: The spiral cleaning unit is equipped with a vibrating element (7), which is a motor; the operating handle (1) is equipped with a switch for the vibrating element (7).

9. The spiral cleaning device for deep borehole wall dust according to claim 4, characterized in that: A movable structure is provided between the end tube (21) and the connector (32). The movable structure includes an undulating surface (24) opened in the end tube (21) and a movable surface (36) provided in the connector (32) that matches the undulating surface (24).

10. The spiral cleaning device for deep borehole wall dust according to claim 9, characterized in that: A ball bearing (37) is provided on the movable surface (36); a spring (81) is provided between the side opposite to the undulating surface (24) of the end tube (21) and the connector (32), and an abutment bearing (82) is provided between the spring (81) and the connector (32).

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