CN104819007A - Hydraulic bracket dust removal nozzle system - Google Patents

Abstract

The invention discloses a hydraulic support dust removal nozzle system, which comprises a base (7), a top beam (1), a suspension column (4), first, second and third hydraulic control systems; the first hydraulic control system includes eight The first dust removal nozzle, the first dust removal nozzle is installed on the upper surface of the top beam (1); the second hydraulic control system includes six second dust removal nozzles, and the second dust removal nozzle is installed under the top beam (1) End face; the third hydraulic control system includes two third dedusting nozzles, and these two third dedusting nozzles are installed in the middle part of the front chamfer of the top beam (1). The present invention is based on the location of the dust source, reasonably arranges the position of the nozzle, sets up three independent hydraulic control systems, and arranges the spraying time according to the production needs. dust concentration in the production environment.

Description

A hydraulic support dust removal nozzle system

technical field

The invention relates to a hydraulic support dedusting nozzle system for a longwall mining face in an underground coal mine, and belongs to the technical field of coal mine spray dedusting.

Background technique

At present, spray dust removal technology is widely used in dust control. Spray dust removal uses high-speed moving water mist particles to collide, intercept, and capture dust particles floating in the air, and finally condenses and settles. Using this dust removal method will greatly reduce the dust concentration. A large amount of dust will be generated during the moving of the hydraulic support and the coal cutting of the coal shearer, which seriously pollutes the production environment and is the main cause of worker pneumoconiosis and underground dust explosion. Therefore, effective measures must be taken to reduce the dust concentration in the production environment. At present, a number of dust removal nozzles are mainly installed at the center line of the lower end face of the top beam of the hydraulic support, and no dust removal nozzles are arranged on the upper end face of the top beam of the hydraulic support and in the middle of the front chamfer, which will cause the spray volume to be too small. The dust above the fuselage and the dust generated during the rack moving process spread to the racks, making it impossible to effectively reduce the dust concentration.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a hydraulic support dedusting nozzle system, based on the position of the dust source, the position of the nozzle is reasonably arranged, three independent hydraulic control systems are set, and the spraying time is arranged according to the production needs , the hydraulic control systems cooperate with each other and work together to reduce the dust concentration in the production environment while avoiding waste of energy and water resources.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a hydraulic support dust removal nozzle system, including a base (7) and a top beam (1), and the base (7) and the top beam (1) are connected and supported by a hydraulic support , and the rear end of the top beam (1) and the base (7) are rotationally connected through the upper connecting plate (5) and the lower connecting plate (6), and also includes the first, second and third hydraulic control systems; the first The hydraulic control system includes eight first dust removal nozzles, the first dust removal nozzles are installed on the upper end surface of the top beam (1), and the eight first dust removal nozzles are divided into two parts with the centerline of the top beam (1) as the axis of symmetry. Rows, four first dust removal nozzles in each row, the first dust removal nozzles in each row are arranged equidistantly, and the first hydraulic control system and the hydraulic support are connected through a lock; the second hydraulic control system includes six second dust removal nozzles , the second dedusting nozzles are installed on the lower end surface of the top beam (1), and the six second dedusting nozzles are divided into two rows with the central line of the top beam as the axis of symmetry, and each row has three second dedusting nozzles. At the same time, The four second dust removal nozzles are arranged between the first two suspension columns (4), while the other two second dust removal nozzles are arranged between the rear two suspension columns (4); the third hydraulic control system includes two A third dust removal nozzle, and these two third dust removal nozzles are installed in the middle of the front end chamfer of the top beam (1), and these two third dust removal nozzles are arranged symmetrically with the center line of the top beam.

Preferably: the nozzle axes of the first dust removal nozzle and the second dust removal nozzle are perpendicular to the end face of the top beam (1); the third dust removal nozzle is along the outer normal direction of the front chamfer of the top beam (1); at the same time The vertical distances between the first dust removal nozzle, the second dust removal nozzle and the third dust removal nozzle and the surface of the top beam (1) are equal.

Preferably: the jet divergence angle θ of the first dedusting nozzle, the second dedusting nozzle and the third dedusting nozzle, wherein 0°<θ<45°.

Preferably: the row spacing between two rows of first dedusting nozzles in the first hydraulic control system is 2x, and the distance between adjacent first dedusting nozzles in each row is y; the second hydraulic control system is located at The row spacing of the second dedusting nozzles between the first two suspension columns (4) is 2x, and the spacing between the adjacent second dedusting nozzles in each row is z; the two rows of the third dedusting nozzles in the third hydraulic control system The row spacing between the nozzles is 2x; and the distances x, y and z satisfy the requirement that there is no jet interference between the adjacent dust removal nozzles of the first dust removal nozzle, the second dust removal nozzle and the third dust removal nozzle.

Preferably: the first dust removal nozzle, the second dust removal nozzle and the third dust removal nozzle spray a mixed liquid of liquid water and dust removal additive.

A method of using a hydraulic support dedusting nozzle system in coal mine longwall mining: the first hydraulic control system is in the working state during the hydraulic support moving process and is locked with the hydraulic support; the second hydraulic control system is in the entire mining process The system is in the working state, and the second hydraulic control system is in the closed state during the operation of the hydraulic support by the support operator; the third hydraulic control system is in the working state during the coal cutting process of the shearer.

A hydraulic support dedusting nozzle system provided by the present invention has the following beneficial effects compared with the prior art:

Since there are three independent hydraulic control systems, the first hydraulic control system is in the working state during the process of moving the hydraulic support (after lowering and before lifting), and is locked with the hydraulic support; Dust from previous roof breakage. During the mining process, the second hydraulic control system is in the working state, and the second hydraulic control system is in the closed state during the operation of the hydraulic support by the support operator, which reduces the dust concentration in the support operator's working environment and prevents the support operator from being exposed to the spray environment. Work. During the coal cutting process of the shearer, the third hydraulic control system is in working condition, which reduces the dust concentration above the shearer body and prevents the dust above the shearer body from spreading to the supports. Therefore, the main advantages of the present invention are as follows: 1. By arranging three independent hydraulic control systems, the spraying time is arranged according to production needs, and the hydraulic control systems cooperate with each other and work together to reduce production while avoiding waste of energy and water resources. dust concentration in the environment. 2. By arranging nozzles on the upper end surface of the support top beam and the middle part of the front chamfer of the top beam, it is possible to effectively control the dust generated during the moving of the hydraulic support and the coal cutting process of the shearer.

3. The amount of spray is increased through symmetrical arrangement, which can minimize the dust in the working environment of the workers on the working face.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic plan view of nozzle arrangement on the upper end face of the top beam of the present invention;

Fig. 3 is a schematic plan view of nozzle arrangement at the front end of the roof beam and the lower end surface of the roof beam of the present invention.

In the figure, 1—top beam; 2—pin shaft; 31—first dust removal nozzle; 32—second dust removal nozzle; 33—third dust removal nozzle; 4—suspension column; 5—upper connecting plate; 6—lower connecting plate ; 7—base.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

A hydraulic support dedusting nozzle system, as shown in Figure 1, includes a base 7 and a top beam 1, the base 7 and the top beam 1 are connected and supported by a hydraulic support, the hydraulic support includes four suspension columns 4, and the suspension column 4 It is connected to the top beam 1 through the pin shaft 2, and is rotatably connected between the rear end of the top beam 1 and the base 7 through the upper connecting plate 5 and the lower connecting plate 6, and also includes the first, second, and third hydraulic control systems; the first A hydraulic control system includes eight first dust removal nozzles, the first dust removal nozzles are installed on the upper surface of the top beam 1, and these eight first dust removal nozzles are divided into two rows with the centerline of the top beam 1 as the axis of symmetry, each Four first dust removal nozzles are arranged in a row, and the first dust removal nozzles in each row are arranged equidistantly, and the first hydraulic control system and the hydraulic support are connected through a lock; when the hydraulic support is moved, the first hydraulic control system is opened; if If the first hydraulic control system is not opened, the hydraulic support cannot be moved; the second hydraulic control system includes six second dust removal nozzles, the second dust removal nozzles are installed on the lower end surface of the top beam 1, and the six second dust removal nozzles The nozzles are divided into two rows with the central line of the top beam as the axis of symmetry, and each row has three second dust removal nozzles. At the same time, the four second dust removal nozzles are arranged between the first two suspension columns 4, and the other two second dust removal nozzles The second dust removal nozzle is arranged between the two rear suspension columns 4; the third hydraulic control system includes two third dust removal nozzles, and these two third dust removal nozzles are installed The three dedusting nozzles are symmetrically arranged on the center line of the top beam.

The nozzle axes of the first dust removal nozzle and the second dust removal nozzle are all perpendicular to the end face of the top beam 1; the third dust removal nozzle is along the outer normal direction of the front chamfer of the top beam 1; The vertical distances between the dust removal nozzle and the third dust removal nozzle and the surface of the top beam 1 are equal.

The jet divergence angle θ of the first dedusting nozzle, the second dedusting nozzle and the third dedusting nozzle, wherein, 0°<θ<45°.

As shown in Figure 2, the row spacing between the two rows of first dedusting nozzles in the first hydraulic control system is 2x, and the distance between the adjacent first dedusting nozzles in each row is y; as shown in Figure 2, The row pitch of the second dedusting nozzles positioned between the first two suspension columns 4 in the second hydraulic control system is 2x, and the distance between adjacent second dedusting nozzles in each row is z; the third hydraulic control system The row spacing between the two rows of the third dedusting nozzles is 2x; and the distances x, y and z satisfy that the adjacent dedusting nozzles of the first dedusting nozzle, the second dedusting nozzle and the third dedusting nozzle do not interfere with each other.

The first dedusting nozzle, the second dedusting nozzle and the third dedusting nozzle spray the mixed liquid of liquid water and dedusting additive.

An arrangement of dust removal nozzles for a hydraulic support. As shown in Figure 1, eight dust removal nozzles are installed on the upper end surface of the top beam of the hydraulic support. It is divided into two rows, with four dust removal nozzles in each row, and the dust removal nozzles in each row are arranged equidistantly, with a mutual distance of y; The dust nozzles are arranged on the other side of the centerline of the roof beam with the centerline of the roof beam as the axis of symmetry. The eight dust removal nozzles are in working condition during the process of lowering, moving and lifting of the hydraulic support to spray Dust removal: six dust removal nozzles are installed on the lower end surface of the hydraulic support top beam, wherein, as shown in Figure 3, four dust removal nozzles are arranged between the first two suspension columns of the hydraulic support with the center line of the top beam as the axis of symmetry. The two dedusting nozzles on one side of the center line of the roof beam are arranged between the suspension columns of the hydraulic support with a distance of z; two dust removal nozzles are arranged between the last two suspension columns of the hydraulic support with the center line of the roof beam as the axis of symmetry; these six One dust removal nozzle takes the centerline of the top beam as the axis of symmetry, one dust removal nozzle is arranged at a position of width x from one side of the centerline of the top beam, and the other dust removal nozzle takes the centerline of the top beam as the axis of symmetry and is arranged at the center of the top beam On the other side of the line, the six dedusting nozzles are in working condition during the general production process, but they are in a closed state when the support operator operates the support; in the middle of the chamfering of the front end of the hydraulic support top beam, the center line of the top beam is Two dust removal nozzles are arranged on the symmetrical axis, one of which is arranged at a position of width x from the center line of the top beam, and the other is arranged symmetrically. state; the distances x, y and z all satisfy that all adjacent dedusting nozzles do not interfere with each other; all dedusting nozzles are divided into three parts by the top beam upper end surface, the top beam lower end surface and the top beam front end chamfer, forming Three independent hydraulic control systems; the nozzle axes of the eight dust removal nozzles on the upper end surface of the top beam and the six dust removal nozzles on the lower end surface of the top beam are perpendicular to the end surface of the top beam; the two dust removal nozzles in the middle of the front chamfer of the top beam The nozzles are along the outer normal direction of the front chamfer of the top beam; all the dust removal nozzles are at the same vertical distance from the top beam surface, and the jet divergence angle θ of all the dust removal nozzles is: 0°<θ<45°. All the dedusting nozzles pass through the liquid water and the dedusting additive at the same time.

A method of using a hydraulic support dedusting nozzle system in coal mine longwall mining:

During the moving process of the hydraulic support, the first hydraulic control system is in working condition and is locked with the hydraulic support. As shown in Figure 1 and 2, the eight dust removal nozzles on the upper end of the top beam form an independent first hydraulic control system. And in the process of moving the hydraulic support, they are all in working condition. At the same time, the first hydraulic control system and the hydraulic support are locked, that is, if the hydraulic support is moved, the first dust removal nozzle must be opened; if it is not opened, the support cannot be moved.

The second hydraulic control system is in the working state during the whole mining process, and the second hydraulic control system is in the closed state during the operation of the hydraulic support by the support operator. As shown in Figures 1 and 3, the six dust removal nozzles on the lower end of the top beam form a The second hydraulic control system can be independent, it is in the working state during the production process, but it is in the closed state during the operation of the frame by the frame operator.

During the coal cutting process of the shearer, the third hydraulic control system is in the working state, as shown in Figure 1 and 3, the two dust removal nozzles in the middle of the chamfer at the front end of the top beam form an independent third hydraulic control system. They are all in working condition during the coal cutting process.

The field measurement shows that in the longwall mining face of the coal mine, the dust generated by the broken roof caused by the hydraulic support moving accounts for about 45% of the total dust, and the remaining 55% is the dust generated by the shearer cutting coal. . A hydraulic support dedusting nozzle system provided by the present invention can effectively control 45% of dust by installing the first dedusting nozzle on the upper end of the top beam; 55% of the dust produced by the coal cutting machine escapes to the brackets; by installing the second dust removal nozzle on the lower end of the top beam, the dust concentration between the brackets will be further reduced. In addition, because the dust has the characteristic of diffusing from high concentration to low concentration area, the dust generated by the broken roof caused by the hydraulic support movement will spread to the front end of the roof beam and the lower end surface of the roof beam, and the first dust collector is installed on the upper end surface of the roof beam. The nozzles cannot completely and effectively control the dust diffused in this area. At this time, due to the second and third dust removal nozzles, the dust diffused to this area can be further controlled. The dust generated by the shearer cutting coal is effectively controlled in the first and second stages through the third and second dust removal nozzles, and the flour dust diffused to the upper end of the roof beam is controlled through the first dust removal nozzle. Therefore, through three independent and unified hydraulic control systems, each hydraulic control system cooperates and works together. On the one hand, it can effectively save energy and water resources, and on the other hand, it can effectively control dust diffusion. However, the traditional hydraulic support dust removal spray system only installs a number of dust removal nozzles at the center line of the lower end surface of the top beam. No dust removal nozzles are arranged on the upper end surface of the hydraulic support top beam and the middle of the front chamfer. National coal mine safety regulations stipulate limit values. By using a hydraulic support dedusting nozzle system provided by the present invention, the dust in the above places will be effectively suppressed, so that the dust concentration in the worker's working environment will be reduced to the concentration limit of 1mg/ ^m3 stipulated in the national coal mine safety regulations, preventing Workers' pneumoconiosis and underground dust explosion accidents.

It can be seen from the above that the present invention arranges the spraying time according to the production needs by setting three independent hydraulic control systems. The hydraulic control systems cooperate with each other and work together to reduce the dust concentration in the production environment while avoiding waste of energy and water resources. ;By arranging nozzles on the upper end surface of the support top beam and the middle part of the front chamfer of the top beam, it is possible to effectively control the dust generated during the moving of the hydraulic support and the coal cutting process of the coal shearer; the spray volume is increased through the symmetrical arrangement, which can minimize Dust in the working environment of face workers. Therefore, the independent hydraulic control system provided by the present invention rationally arranges nozzle positions, reduces the dust concentration in the coal mining production environment, arranges the spray time according to production needs, increases the spray volume, and reduces the dust in the production environment while avoiding waste of energy and water resources. Dust concentration. Therefore, the present invention is based on the position of the dust source, reasonably arranges the position of the nozzle, sets three independent hydraulic control systems, and arranges the spraying time according to the production needs. The hydraulic control systems cooperate with each other and work together to avoid waste of energy and water resources. The dust concentration in the production environment is reduced.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (6)

1. a hydraulic support Spray-nozzle for removing dust system, comprise base (7), back timber (1), described base (7) and back timber (1) are connected by hydraulic support and support, and be rotationally connected by upper plate (5) and lower plate (6) between the rear end of back timber (1) and base (7), it is characterized in that: also comprise first, second, third hydraulic regulating system; First hydraulic regulating system comprises eight the first Spray-nozzle for removing dust, described first Spray-nozzle for removing dust is arranged on the upper surface of back timber (1), and these eight first Spray-nozzle for removing dust are that axis of symmetry is divided into two rows with back timber (1) center line, often arrange four the first Spray-nozzle for removing dust, often each first Spray-nozzle for removing dust equidistant placement in row, the first hydraulic regulating system is connected by locking with between hydraulic support simultaneously; Second hydraulic regulating system comprises six the second Spray-nozzle for removing dust, described second Spray-nozzle for removing dust is arranged on the lower surface of back timber (1), and these six second Spray-nozzle for removing dust with back timber center line for axis of symmetry is divided into two rows, often arrange three the second Spray-nozzle for removing dust, simultaneously, described wherein four the second Spray-nozzle for removing dust are arranged between the first two suspension column (4), and another two the second Spray-nozzle for removing dust are arranged between latter two suspension column (4); 3rd hydraulic regulating system comprises two the 3rd Spray-nozzle for removing dust, and these two the 3rd Spray-nozzle for removing dust are arranged in the middle part of back timber (1) Leading end chamfer, and these two the 3rd Spray-nozzle for removing dust are arranged symmetrically with back timber center line simultaneously.

2. hydraulic support Spray-nozzle for removing dust system according to claim 1, is characterized in that: the nozzle-axis of described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust is all vertical with back timber (1) end face; Described 3rd Spray-nozzle for removing dust is along the exterior normal direction of back timber (1) anterior chamfering; First Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust are equal with the vertical distance on back timber (1) surface simultaneously.

3. hydraulic support Spray-nozzle for removing dust system according to claim 1, it is characterized in that: the jet dispersion angle θ of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust, wherein, 0 ° of < θ < 45 °.

4. hydraulic support Spray-nozzle for removing dust system according to claim 1, is characterized in that: two trestle column that ranked first between Spray-nozzle for removing dust in described first hydraulic regulating system are 2x, and the spacing of the first often adjacent in row Spray-nozzle for removing dust is y; The trestle column of the second Spray-nozzle for removing dust be positioned between the first two suspension column (4) in described second hydraulic regulating system is 2x, and the spacing of the second often adjacent in row Spray-nozzle for removing dust is z; Two trestle column that ranked third between Spray-nozzle for removing dust in described 3rd hydraulic regulating system are 2x; And distance x, y and z meet between the adjacent Spray-nozzle for removing dust of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust, the 3rd Spray-nozzle for removing dust and jet interference do not occur.

5. hydraulic support Spray-nozzle for removing dust system according to claim 1, is characterized in that: described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust spray the mixing material of aqueous water and dust-removing additive.

6., based on the using method of hydraulic support Spray-nozzle for removing dust system according to claim 1 in underground coal mine broadwall, it is characterized in that: in hydraulic moving stand process, the first hydraulic regulating system is in running order, and realizes locking with hydraulic support; In whole recovery process, the second hydraulic regulating system is in running order, operates hydraulic support period second hydraulic regulating system be in closed condition support operative employee; In coal-winning machine coal cutting process, the 3rd hydraulic regulating system is in running order.