Dust suppression structure of cutting section

Abstract

The present invention relates to a cutting part dust suppression structure, including a first and a second dust suppression structure, wherein the first dust suppression structure includes a front spray device of an arm and a rear spray device of a drum, wherein the rear spray device of the drum is fixed to the rear end of the drum blade, wherein the spray direction of the nozzle is designed to be along the tangent direction of the corresponding circle on the rear end surface of the drum where the corresponding nozzle is located, and is opposite to the rotation direction of the drum, wherein the front spray device of the arm is fixed to the top of the arm, the left side or the right side of the drum near the front end surface of the arm, wherein the spray coverage area of ​​the nozzle is designed to be in front of the corresponding nozzle, and the second dust suppression structure includes a rear spray device of the arm, wherein the rear spray device of the arm is fixed to the cylindrical surface of the arm near the rear end surface of the arm, wherein the nozzle is arranged at intervals in the left-right direction, and the spray coverage area is designed to be in front of and above the corresponding nozzle. The present invention has a significant dust suppression effect, can make up for the deficiency of dust suppression inside the drum, and at the same time minimize the influence of spray water on the grade of mineral materials.

Description

Technical Field

[0001] The invention relates to a dust suppression structure of a cutting part of a mining machine, and is particularly suitable for the occasion where a drum mining machine cuts a mine wall and crushes mineral materials to generate a large amount of dust, and belongs to the technical field of underground mining machinery. Background Art

[0002] The drum miner uses the picks on the drum to cut and crush the ore on the mine wall, and then uses the spiral blades to load and transport the cut ore to the conveyor under the machine body to be transported out of the working surface. The existing drum miner has multiple nozzles on the spiral blades, which are used to spray the corresponding pick tips to extinguish the friction sparks that may occur when cutting hard ore, thereby avoiding the explosion of harmful gases such as gas, and reducing dust at the same time. For occasions without the harm of harmful gases such as gas, the main function of these nozzles is to reduce the dust generated by cutting and crushing.

[0003] However, when the spray water has a great impact on the grade of the ore, users often block some nozzles and only keep some nozzles to discharge water to mine the ore. This method can easily lead to nozzle blockage, especially in the environment of mining fine-grained ore, so that the spray inside the drum can hardly play a dust reduction role, and finally cause a large amount of dust to spread on the working surface, affecting mining (line of sight) and the personal health of operators.

[0004] In response to the above problems, the industry has also tried to reduce the actual spray flow rate by lowering the spray pressure to reduce the impact of spray water on the grade of mineral materials. However, the spray with lower pressure can easily cause nozzle blockage, causing the spray effect inside the drum to drop sharply or even fail. Summary of the invention

[0005] The purpose of the present invention is to provide a dust suppression structure for the cutting part, which can make up for the dust suppression problem when the spray effect inside the existing drum is poor or fails, effectively solve the vision problem of mining operations and the safety and health problems of operators caused by mine dust, and at the same time minimize the influence of spray water on the grade of mineral materials.

[0006] The main technical solutions of the present invention are:

[0007] A cutting part dust suppression structure includes a first dust suppression structure, wherein the first dust suppression structure includes a front end spray device of an arm and a rear end spray device of a drum, wherein the rear end spray device of the drum is fixed to the rear end of the drum blade, and the designed spray direction of the nozzle of the rear end spray device of the drum is along the tangent direction of the corresponding circle of the corresponding nozzle on the rear end surface of the drum, and is opposite to the rotation direction of the drum, and the front end spray device of the arm is fixed to the top of the arm, the left side or the right side of the drum, and is close to the front end surface of the arm, and the designed spray coverage area of ​​the nozzle of the front end spray device of the arm is in front of the corresponding nozzle.

[0008] The nozzles of the spray device at the front end of the arm are arranged at intervals in the left-right direction, preferably in order from the end close to the mounting base of the arm to the end close to the drum, and the designed spray direction of each nozzle gradually transitions from the front lower to the front upper.

[0009] The spray device at the front end of the arm can also include a spray block and a water inlet connector. The spray block is provided with a connecting water trough extending along its length direction. The spray block is also provided with a plurality of nozzle grooves spaced apart along its length direction. The bottom of each nozzle groove is communicated with the connecting water trough. A nozzle is installed in each nozzle groove. The spray block is fixed on the arm, and its connecting water trough is communicated with the first water channel in the arm through the water inlet connector.

[0010] The spray device at the rear end of the drum also includes a trough plate, which is fixedly installed on the rear end of the drum blade, and is connected to the second water channel in the arm. A single trough plate extends from the core of the drum to the radial edge, and multiple trough plates are arranged at intervals in the circumferential direction. The nozzle of the spray device at the rear end of the drum is fixedly installed on the trough plate, and the multiple nozzles installed on each trough plate are arranged at intervals along the extension direction of the trough plate.

[0011] The cutting part dust suppression structure also includes a second dust suppression structure, which includes a spray device at the rear end of the arm, and the spray device at the rear end of the arm is fixed on a cylindrical surface of the arm close to the rear end surface of the arm. The spray device at the rear end of the arm also includes a group of nozzles, which are arranged at intervals in the left and right directions. The designed spray coverage area of ​​the nozzles of the spray device at the rear end of the arm is in front and above the corresponding nozzles.

[0012] The water outlet diameters of all nozzles are preferably in the range of 0.5-1.5 mm.

[0013] The spray device at the rear end of the arm is preferably built into the arm.

[0014] The spray device at the rear end of the arm can also include a plurality of sinking nozzle seats, and each nozzle of the spray device at the rear end of the arm is installed in the sinking nozzle seat one by one. The sinking nozzle seat and the nozzle thereon are installed on the arm as a whole, and the bottom of each sinking nozzle seat is connected to a water trough located in the arm, and the water trough is connected to the third water channel in the arm.

[0015] All nozzles are preferably fitted with anti-blocking shields.

[0016] The rear end face of the arm and a narrow cylindrical surface adjacent to the rear end face are both provided with an edge wear-resistant layer, and the rear end spray device of the arm is located at the front side of the edge wear-resistant layer.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a first dust suppression structure, which can effectively capture and suppress dust on the end surface of the drum and behind the drum even when the spray inside the drum fails, thereby preventing a large amount of dust from escaping outside the drum and affecting the working line of sight.

[0019] The present invention can capture and suppress a small part of dust after the first dust suppression by setting a second dust suppression structure, and the second dust suppression structure is built into the boom, which significantly improves the working reliability, avoids spray failure due to blockage or scratch damage, and extends the service life. At the same time, the second dust suppression structure is arranged on the edge of the boom column near the rear end, which greatly enhances the dust dilution effect. Regardless of the position state of the cutting part during thick or thin ore layer mining, effective peripheral spray can be formed, which greatly improves the safety and health of mining operations and realizes green mining.

[0020] The present invention improves the atomization effect and greatly reduces the water flow rate by setting a small-aperture nozzle, which can well meet the requirements of high-grade mineral mining with strict requirements on water volume control and solves the dust suppression problem of the drum mining machine under the condition of controlling the drum with less water volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A top view of

[0023] Figure 3 for Figure 1 Left view of

[0024] Figure 4a is a schematic diagram of the first dust suppression structure;

[0025] Figure 4b for Figure 4a A top view of

[0026] Figure 5a It is a structural schematic diagram of an embodiment of the spray device at the front end of the arm;

[0027] Figure 5b for Figure 5a A top view of

[0028] Figure 5c for Figure 5a Left-view enlarged image of ;

[0029] Figure 6 for Figure 5c K-direction view;

[0030] Figure 7 for Figure 6 Schematic diagram of comparison of different angles of each nozzle slot;

[0031] Figure 8 is a partial view of the second dust suppression structure in the left direction;

[0032] Fig. 9 It is a schematic diagram of the state of the dust suppression structure of the cutting part of the present invention when it is working against the wind;

[0033] Fig.10 It is a schematic diagram of the state of the dust suppression structure of the cutting part of the present invention when working in the downwind direction. Description of the drawings:

[0035] 1. The first dust suppression structure; 11. The spray device at the front end of the arm; 111. The spray block; 1110. The spray water outlet angle; 1111. The nozzle slot; 01. The lower 30° nozzle slot; 02. The lower 20° nozzle slot; 03. The lower 10° nozzle slot; 04. The 0° nozzle slot; 05. The upper 10° nozzle slot; 06. The upper 20° nozzle slot; 07. The upper 30° nozzle slot; 08. The upper 40° nozzle slot; 1112. The connecting water tank; 112. The nozzle; 113. The water inlet connector; 114. The positioning pin; 115. The fastener; 12. The spray device at the rear end of the drum; 121. The water tank plate; 122. The nozzle;

[0036] 2. Second dust suppression structure; 21. Sinking nozzle seat; 22. Nozzle; 221. Anti-blocking cover; 222. Water outlet angle;

[0037] 3. Boom; 31. First water channel; 32. Second water channel; 33. Third water channel; 34. Edge wear-resistant layer; 35. Connecting axis; 36. Arc cylinder;

[0038] 4. Roller;

[0039] 90. Wind flow; 91. The wall of the right roller to be mined; 92. The wall of the left roller to be mined; 93. Longitudinal dust raising by the right roller; 94. Longitudinal dust raising by the left roller. DETAILED DESCRIPTION

[0040] The present invention discloses a cutting part dust suppression structure, such as Figure 1-8As shown, it includes a first dust suppression structure 1, which includes a front-end spray device 11 of the arm and a rear-end spray device 12 of the drum. The rear-end spray device of the drum is fixed to the rear end of the drum blade, and the design spray direction of its nozzle 122 is along the tangent direction of the corresponding circumference of the corresponding nozzle on the rear end surface of the drum, and is opposite to the rotation direction of the drum. As the drum rotates, the spray sprayed by the rear-end spray device of the drum forms a drum end space full of water mist, which is mainly used to dilute and suppress the dust generated by the cutting and loading of the drum, so as to achieve dust reduction. The front-end spray device of the arm is fixed to the top of the arm 3, the left or right side of the drum 4 (for the left drum, it is the right side of the drum, for the right drum, it is the left side of the drum, which is the dust side of the corresponding drum, located on the side of the drum near the mounting base of the arm) and close to the front end surface of the arm, and its nozzle 112 is arranged at intervals in the left and right directions, and the design spray coverage area is in front of the corresponding nozzle, which is mainly used to dilute the dust thrown out to the left or right from the drum.

[0041] Since the drum 4 is installed on the arm 3 at one end away from the mounting base of the arm (where the connecting axis 35 is located) and is located on the front side of the arm, the rear end spray device of the drum and the front end spray device of the arm are basically located in the same longitudinal plane in the front-to-back direction, and because the front end spray device of the arm is located between the mounting base of the arm and the drum in the left-right direction, the front end spray device of the arm and the rear end spray device of the drum are adjacently arranged in the left-right direction, so the front end spray device of the arm can be well connected with the rear end spray device of the drum to achieve water mist connection in the left-right direction. During spraying, the first dust suppression structure 1 can form a nearly closed or semi-closed space filled with water mist between the front end face of the arm or the rear end face of the drum and the mine wall, which can control and dilute the dust raised by the mineral material loaded by the drum blades, so as to achieve effective control and suppression of dust.

[0042] like Figure 1 , 3As shown in Figures 6 and 7, the nozzles of the spray device 11 at the front end of the arm are arranged at intervals along the left and right directions, and the design spray direction of each nozzle is set to gradually transition from the front lower part to the front upper part in the order from the end of the mounting base close to the arm to the end of the drum close to the drum. For the area near the drum, due to the rotation of the drum, dust is easily brought up, and the upper and middle parts of the drum and the dust-raising area can be covered as much as possible by the upper spray action angle, thereby reducing dust escape; for the area near the mounting base, the lower spray action angle, combined with the layered transition setting of the spray action angle from the upper end near the drum to the lower end near the mounting base, can better form a nearly closed water mist space, especially under the joint action of wind speed, the lower action angle near the mounting base end is more likely to promote the combination and dilution of water mist and dust, effectively reducing dust escape. In summary, the nozzles 112 of the spray device at the front end of the arm are arranged into a longitudinal multi-angle and layered structure according to the above characteristics, so that a water mist space from high to low can be formed on the dust-raising side of the drum, which can more effectively carry out dust sparseness and suppression.

[0043] The front spray device of the boom also includes a spray block 111 and a water inlet connector 113, and the spray block is connected to the first water channel 31 in the boom through the water inlet connector. More specifically, the spray block is provided with a connecting water tank 1112 and a plurality of nozzle slots 1111 facing the mine wall at different angles and spaced apart along the length direction of the spray block, such as Figure 7 In the embodiment shown, there are lower 30° nozzle slot 01, lower 20° nozzle slot 02, lower 10° nozzle slot 03, 0° nozzle slot 04, upper 10° nozzle slot 05, upper 20° nozzle slot 06, upper 30° nozzle slot 07 and upper 40° nozzle slot 08. A nozzle 112 is installed in each nozzle slot 1111. The designed spray direction of each nozzle is different due to the different angles of the nozzle slot in which it is located. The bottom of each nozzle slot is connected to the connecting water tank. The water inlet connector 113 is installed on the spray block. The water of the first water channel enters the nozzle slot 1111 through the water inlet connector 113 and the connecting water tank 1112 in turn, and finally sprays to the mine wall side and the drum in front of the drum by multiple nozzles 112 at different angles. The water inlet connector can adopt a pin structure with an inner hole and a seal. The multi-angle spray outlet angle 1110 of the nozzle slot 1111 is arranged from the connecting axis 35 to the drum direction from bottom to top to form a continuous closed dust suppression space. The spray block is fixed on the arm frame. In this embodiment, the spray block can be positioned by a positioning pin 114 and fixed on the arm frame by a fastener 115.

[0044] The spray block may also be configured as a structure integrated with the arm 3, so that the positioning pin 114 and the fastener 115 can be omitted.

[0045] The drum rear end spray device also includes a water trough plate 121, which is fixedly mounted on the rear end of the drum blade, preferably welded and fixed. The water hole in the water trough plate is connected to the second water channel 32 in the arm frame, and the nozzle 122 of the drum rear end spray device is fixedly mounted on the water trough plate, and the water inlet of the nozzle is connected to the water hole, and the multiple nozzles 122 installed on each water trough plate are arranged at intervals along the extension direction of the water trough plate. The water of the second water channel is introduced into the nozzle 122 through the water hole. As the drum rotates, the water mist sprayed by the nozzle 122 forms a spatial water mist layer located at the rear end of the drum, which isolates and dilutes the dust generated by the drum cutting the mineral material, and prevents the dust from escaping in large quantities from the rear end face of the drum. A single water trough plate is extended from the core of the drum to the radial edge. In this embodiment, the single water trough plate is preferably inclined at an angle relative to the radial direction on the rear end face of the drum, wherein the outer end of the water trough plate close to the radial edge of the drum deviates in the opposite direction of the rotation direction of the drum. Multiple water trough plates are arranged at intervals in the circumferential direction, that is, multiple water trough plates are arranged in a central radial shape on the rear end face of the drum.

[0046] The cutting part dust suppression structure preferably also includes a second dust suppression structure 2, the second dust suppression structure uses a rear end spray device of the arm, the rear end spray device of the arm is fixed on the cylinder 36 near the rear end face of the arm, and the rear end spray device of the arm also includes a group of nozzles 22, which are arranged at intervals along the left and right directions of the edge of the cylinder. The spray coverage area of ​​the nozzle of the rear end spray device of the arm is designed to be above and in front of the corresponding nozzle, and the nozzle outlet angle 222 is as follows: Figure 8 As shown, the nozzle 22 sprays water mist toward the outer space of the arm frame toward the drum side, which secondary dilutes and suppresses the dust that has not been completely suppressed on the drum blades and behind the drum, further improving the dust suppression effect.

[0047] The water outlet diameters of all nozzles are preferably within the range of 0.5-1.5mm, which is significantly smaller than that of traditional nozzles, thereby improving the atomization effect. At the same time, the water flow rate is greatly reduced, which can well meet the requirements of high-grade mineral mining with strict water volume control, and solve the dust suppression problem of the drum mining machine under the condition of controlling the drum with less water volume.

[0048] The rear end spray device of the arm is preferably built into the arm. In this embodiment, the rear end spray device of the arm also includes a plurality of sinking nozzle seats 21, and each nozzle 22 of the rear end spray device of the arm is installed in the sinking nozzle seat one by one. The sinking nozzle seat and the nozzle 22 thereon are installed on the arm as a whole, and the highest point does not exceed the top cylindrical surface 36 of the arm, which can avoid the bracket from squeezing and scratching the rear end spray device of the arm and effectively extend the service life. The bottom of each sinking nozzle seat is connected to a water trough located in the arm, and the water trough can be formed by welding a sealing plate on the top of the water outlet trough with an open top surface on the arm. The water trough is connected to the third water channel 33 in the arm, and the water of the third water channel flows through the water trough to the bottom of each sinking nozzle seat, and then enters each nozzle, and finally sprays from each nozzle 22 to the outer space of the arc cylindrical surface 36 of the arm toward the drum side (i.e., upward and forward), so as to perform secondary dilution and suppression of dust. The nozzles 22 are arranged at intervals along the circumference of the cylindrical surface of the arm, and when spraying, a second plane water mist barrier can be formed on the longitudinal plane where the rear end surface of the arm is located.

[0049] In this embodiment, the arc cylinder 36 provides a reference installation surface for the first water channel, the second water channel and the third water channel. The first water channel, the second water channel and the third water channel provide spray water for the arm front spray device, the roller rear spray device and the arm rear spray device respectively.

[0050] An anti-blocking cover 221 is preferably installed at the water inlet of all nozzles. The anti-blocking cover filters the water flowing through the water-passing gap thereon to reduce the risk of the nozzle being blocked, and the anti-blocking cover can be removed for cleaning.

[0051] The rear end face of the arm and a narrow cylindrical surface adjacent to the rear end face are provided with an edge wear-resistant layer 34, and the rear end spray device of the arm is located in front of the edge wear-resistant layer. The edge wear-resistant layer 34 can protect the outer surface of the arm 3 and the second dust suppression structure to prevent the bracket from being worn.

[0052] Fig. 9 , 10They are schematic diagrams of the state of the dust suppression structure of the cutting part of the present invention when working in the upwind direction and the downwind direction. Taking the wind flow 90 to the right as an example, the dust suppression structure of the cutting part moves with the mining machine to the left in the upwind direction and to the right in the downwind direction. The roller closer to the direction of travel of the left and right rollers is higher in position and cuts a higher layer of mineral material. The left roller wall 92 to be mined and the right roller wall 91 to be mined are located on the same side of the left roller and the right roller, respectively, and are closer to the direction of travel. The left roller and the right roller rotate in the counterclockwise and clockwise directions, respectively. The mineral dust at the roller is mainly diluted and controlled by the spray device 12 at the rear end of the roller to reduce the spillage of mineral dust to the rear. The longitudinal dust 94 of the left drum and the longitudinal dust 93 of the right drum are mainly scattered between the mounting bases of their respective drums and their respective arms, and the dust can be diluted and controlled in two stages, front and rear, by the spray device 11 at the front end of the arm and the spray device at the rear end of the arm, wherein the dilution and control at the front stage are connected with the spray device 12 at the rear end of the drum in the left and right directions, so that the dust reduction coverage area at the front stage is larger and more coherent. It can be seen that the present invention establishes a more effective external spray system by constructing a wider and more continuous water mist space in the left and right directions and constructing a multi-stage water mist space in the front and rear directions, thereby making up for the deficiency of internal spray of the drum.

Claims

1. A dust suppression structure for a cutting part, characterized in that: It includes a first dust suppression structure and a second dust suppression structure. The first dust suppression structure includes a spray device at the front end of the arm and a spray device at the rear end of the drum. The spray device at the rear end of the drum is fixed to the rear end of the drum blade. The designed spray direction of the nozzle of the spray device at the rear end of the drum is along the tangent direction of the corresponding circle of the corresponding nozzle on the rear end surface of the drum, and is opposite to the rotation direction of the drum. For the left roller, the spray device at the front end of the arm is fixed to the top of the arm and is located on the right side of the drum close to the front end surface of the arm. For the right roller, the spray device at the front end of the arm is fixed to the top of the arm and is located on the left side of the drum close to the front end surface of the arm. The designed spray coverage area of ​​the nozzle of the spray device at the front end of the arm is in front of the corresponding nozzle. The second dust suppression structure includes a spray device at the rear end of the arm. The spray device at the rear end of the arm is fixed on the cylindrical surface of the arm close to the rear end surface of the arm. The spray device at the rear end of the arm also includes a group of nozzles. These nozzles are arranged at intervals in the left and right directions. The designed spray coverage area of ​​the nozzle of the spray device at the rear end of the arm is in front of and above the corresponding nozzle.

2. The dust suppression structure of the cutting part according to claim 1, characterized in that: The nozzles of the spray device at the front end of the arm are arranged at intervals along the left-right direction. In order from the end of the mounting base close to the arm to the end close to the drum, the designed spray direction of each nozzle gradually transitions from the front lower part to the front upper part. The spray device at the front end of the arm also includes a spray block and a water inlet connector. The spray block is provided with a connecting water trough extending along its length direction. The spray block is also provided with a plurality of nozzle grooves distributed at intervals along its length direction. The bottom of each nozzle groove is communicated with the connecting water trough. A nozzle is installed in each nozzle groove. The spray block is fixed on the arm, and its connecting water trough is communicated with the first water channel in the arm through the water inlet connector.

3. The dust suppression structure of the cutting part according to claim 2, characterized in that: The spray device at the rear end of the drum also includes a trough plate, which is fixedly installed on the rear end of the drum blade. The water hole in the trough plate is connected to the second water channel in the arm frame. A single trough plate is extended from the core of the drum to the radial edge, and multiple trough plates are arranged at intervals in the circumferential direction. The nozzle of the spray device at the rear end of the drum is fixedly installed on the trough plate, and the water inlet of the nozzle is connected to the water hole. The multiple nozzles installed on each trough plate are arranged at intervals along the extension direction of the trough plate.

4. The dust suppression structure of the cutting part according to claim 1, 2 or 3, characterized in that: The water outlet diameters of all nozzles are within the range of 0.5-1.5mm.

5. The dust suppression structure of the cutting part according to claim 1, characterized in that: The spray device at the rear end of the arm frame is built in the arm frame.

6. The dust suppression structure of the cutting part according to claim 5, characterized in that: The spray device at the rear end of the arm also includes a plurality of sinking nozzle seats, and each nozzle of the spray device at the rear end of the arm is installed in the sinking nozzle seat one by one. The sinking nozzle seat and the nozzle thereon are installed on the arm as a whole, and the bottom of each sinking nozzle seat is connected to a water trough located in the arm, and the water trough is connected to the third water channel in the arm.

7. The dust suppression structure of the cutting part according to claim 5, characterized in that: All nozzles are fitted with anti-blocking shields.

8. The dust suppression structure of the cutting part according to claim 5, characterized in that: The rear end face of the arm and a narrow cylindrical surface adjacent to the rear end face are both provided with an edge wear-resistant layer, and the rear end spray device of the arm is located at the front side of the edge wear-resistant layer.

Images