Self-cleaning anti-blocking atomizing nozzle for cutting drum

Abstract

The application discloses a kind of cutting drum self-cleaning anti-blocking atomizing nozzle, belong to cutting drum spray technical field;Including shell, sliding valve core and center valve core, sliding valve core is sleeved in the linear valve chamber of shell;Center valve core passes through the center hole of sliding valve core, center valve core and the tail section of center hole sliding seal, and the remaining medium passage between the front section of center hole and outlet;Medium hole in shell and medium passage are communicated;When nozzle is blocked, plug closes the outlet of medium passage, center valve core and sliding valve core are withdrawn in shell, the inflow hole section and outflow hole section of self-cleaning hole are guided through the spiral groove on sliding valve core, medium flows through spiral groove and pushes sliding valve core to rotate, tear the lump of coal between sliding valve core and plug when sliding valve core rotates, the pressure of medium in medium passage can break through impurity, play self-cleaning effect;The application solves the problem that nozzle installed on cutting drum is blocked.

Description

Technical Field

[0001] This invention belongs to the field of cutting drum spraying technology, and relates to a self-cleaning and anti-clogging atomizing nozzle for cutting drums. Background Technology

[0002] Drum shearers utilize the cutting teeth on the drum to cut and crush the ore face and material. The cut material is then loaded onto a conveyor below the machine and transported out of the working face. Existing drum shearers have multiple nozzles on their spiral blades to spray the tips of the corresponding cutting teeth to extinguish frictional sparks that may occur when cutting hard ore, thus preventing the combustion and explosion of harmful gases such as methane. Simultaneously, these nozzles suppress dust. In areas without the threat of methane or other harmful gases, their primary function is to suppress dust generated during cutting and crushing.

[0003] When the coal mining machine is cutting coal, the pressure between the coal wall and the drum causes coal particles to enter the nozzle. These coal particles then stick and compact on the nozzle, causing it to become clogged. This is especially true when mining fine-grained ore, where the nozzle clogging is more severe. As a result, the spray inside the drum is essentially ineffective in reducing dust, leading to a large amount of dust spreading across the working face, affecting visibility and the health of the workers.

[0004] Chinese patent CN209549738U discloses a nozzle assembly that adjusts the gap between the blockage and the nozzle housing through an elastic element. Patent CN211116115U discloses an anti-backflow filling slurry nozzle for tailings backfilling in underground mines, consisting of a connecting pipe, a hollow bolt body, a T-shaped piston head, a compression spring, and a sleeve assembly. Patent CN213943573U discloses a dual-fluid water-air mixing anti-clogging nozzle for dust removal, with a mixing channel inside the housing and a spray port at the front end of the housing; the air inlet, water inlet, and spray port are connected to the mixing channel. Patent CN111810945A... Patent CN202621346U discloses a clog-resistant atomizing nozzle. This nozzle, through the cooperation of a guide plate, a sliding device, and the atomizing nozzle itself, prevents clogging by sliding the nozzle cap up and down. A filter screen outside the nozzle cover prevents external particles from clogging the nozzle and causing it to lose its atomizing effect. Patent CN108927300B discloses a dual-fluid clog-resistant nozzle, including a nozzle body, an anti-clogging needle, and a spray port, a water inlet, and an air inlet on the nozzle body. Patent CN108927300B discloses an anti-clogging nozzle, including a nozzle body with a spray port. The nozzle body has a cylindrical portion and a plug at the front end of the cylindrical portion. The spray port is located on the plug. A buildup cavity for impurities in the fluid is provided on the side wall of the plug near the inlet end of the spray port. The buildup cavity is located in front of the inlet end of the spray port. Patent CN206454833U discloses an anti-clogging atomizing nozzle, including a connector, a nozzle, and a rotor. The connector and nozzle are welded together. The nozzle has a spray chamber and a nozzle opening. The rotor is located at the connection between the spray chamber and the connector. Patent CN110653077B discloses a self-cleaning anti-clogging nozzle. It has a rotating ball inside a receiving cavity between a nozzle seat and a nozzle cover. The rotating ball forms a pressure-stabilizing cavity and multiple pressure-holding channels. Nozzles are located on opposite sides of the pressure-stabilizing cavity. Liquid to be sprayed enters from the pipe inlet and passes through the nozzle opening on the side of the rotating ball facing the nozzle seat and the pressure-holding channels into the pressure-stabilizing cavity, and is sprayed outwards from the nozzle opening on the side of the rotating ball facing the nozzle cover. Although these existing patents all involve nozzles and anti-clogging structures, they all suffer from complex structures and cannot effectively achieve self-cleaning for difficult-to-clean solid particles such as coal slag. Existing self-cleaning nozzles still have many shortcomings. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art by proposing a self-cleaning and anti-clogging atomizing nozzle for a cutting drum, thus solving the problem of nozzles installed on the cutting drum being clogged.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A self-cleaning and anti-clogging atomizing nozzle for a cutting drum includes a housing, a sliding valve core, and a central valve core. A linear valve chamber is provided inside the housing. An outlet is provided at one end of the linear valve chamber. The sliding valve core is disposed inside the linear valve chamber and is slidably and sealingly connected to the inner wall of the linear valve chamber. The sliding valve core is free in the axial and circumferential directions inside the linear valve chamber. An opening is provided at the end of the sliding valve core adjacent to the outlet. A first reset mechanism is connected between the sliding valve core and the housing. The sliding valve core has a central channel along its center along the axial direction. The central valve core passes through the central channel of the sliding valve core. The central valve core is slidably and sealingly connected to the end of the central channel away from the outlet, and a medium channel is left between the central valve core and the rest of the central channel. The medium channel is connected to the outlet. A plug is connected to the front end of the central valve core. The rear end of the central valve core is axially and slidingly connected to the housing. The central valve core is not circumferentially rotatable relative to the housing. A second reset mechanism is connected between the central valve core and the sliding valve core. The plug is located at the opening. The end of the housing away from the outlet is provided with a medium channel, one end of which is connected to the outside and the other end is connected to the medium channel through a linear valve chamber; a self-cleaning channel is provided on the side of the housing, which is connected to the linear valve chamber; a spiral groove is provided circumferentially on the sliding valve core. Under normal operating conditions, the outlet from the medium channel to the medium passage is opened, the first and second reset mechanisms are released, and the self-cleaning channel of the housing is disconnected by the sliding valve core. In self-cleaning mode, the plug seals the medium channel, the central valve core and the sliding valve core retract into the housing, the first reset mechanism and the second reset mechanism store energy, and the inflow and outflow sections of the self-cleaning channel are connected through the spiral groove on the sliding valve core. The medium flows through the spiral groove and pushes the sliding valve core to rotate. Under the pressure of the fluid, the impurities adhering to the nozzle are impacted by the relative rotational motion of the central valve core and the sliding valve core.

[0007] Furthermore, the first reset mechanism is a first spring, with one end of the first spring connected to the bottom surface of the linear valve chamber and the other end connected to the sliding valve core; the direction of the force of the first spring is along the axial direction of the housing, and the first spring stores energy when the sliding valve core slides under the external force, and after the external force disappears, the first spring pushes the sliding valve core to reset.

[0008] Furthermore, it also includes a balance spring, which is located at the end of the sliding valve core away from the first spring. One end of the balance spring is connected to the shoulder of the sliding valve core, and the other end is connected to the housing. The balance spring is used to reduce the impact of the sliding valve core on the housing during reset.

[0009] Furthermore, the second reset mechanism is a second spring, which is sleeved around the central valve core, with one end connected to the plug and the other end connected to the central channel of the sliding valve core; when the central valve core is subjected to an external force, the second spring stores energy, and after the external force disappears, the second spring pushes the central valve core to reset.

[0010] Furthermore, the housing is provided with a shaft hole, and a keyway is provided inside the shaft hole, with a key connection between the keyway and the central valve core.

[0011] Furthermore, the sliding valve core is provided with a frustum-shaped opening, and the plug is also a frustum-shaped structure. The constricted end of the plug is adapted to the shape and size of the constricted end of the frustum-shaped opening. Under normal working conditions, the inclined surface of the plug and the frustum-shaped opening form an inclined flow channel, causing the liquid to spray out radially. When blockage occurs, the plug blocks the medium channel opening to seal the medium channel.

[0012] The beneficial effects of this invention compared to the prior art are as follows: This invention provides a self-cleaning, anti-clogging atomizing nozzle for use on a cutting drum. The nozzle has a two-layer valve core movement mechanism and two independent liquid flow channels. During normal operation, the self-cleaning flow channel is closed by the sliding valve core, while the spray flow channel is open, with all liquid pressure supplied to it, resulting in high pressure and high flow rate at the nozzle orifice. When the spray flow channel of the self-cleaning nozzle becomes blocked, the sliding valve core moves, allowing the self-cleaning flow channel to open. The liquid within the self-cleaning flow channel pushes the sliding valve core to rotate, tearing away the accumulated coal at the blockage point and thus clearing the spray flow channel. After the spray flow channel is cleared, the sliding valve core resets, closing the self-cleaning flow channel again, and the nozzle returns to unobstructed operation. This invention solves the problem of nozzles installed on cutting drums being easily clogged. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the self-cleaning and anti-clogging atomizing nozzle of the cutting drum described in this invention under normal working conditions; Figure 2 This is a schematic diagram of the self-cleaning and anti-clogging atomizing nozzle of the cutting drum described in this invention in the self-cleaning state; In the picture: 1-Shell; 101-Linear valve chamber; 102-Media channel; 103-Self-cleaning channel; 2-First spring; 3-Sliding valve core; 301-Medium passage; 302-Helical groove; 4-Center valve core; 5-Balance spring; 6-Second spring; 7-Plug. Detailed Implementation

[0014] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0015] like Figure 1 , Figure 2 As shown, this embodiment proposes a self-cleaning, anti-clogging atomizing nozzle for a cutting drum, including a housing 1, a sliding valve core 3, and a central valve core 4; a linear valve chamber 101 is provided inside the housing 1; an outlet is provided at one end of the linear valve chamber 101; the sliding valve core 3 is fitted inside the linear valve chamber 101 of the housing 1 and is slidably and sealingly connected to the inner wall of the linear valve chamber 101; the sliding valve core 3 is axially and circumferentially free within the linear valve chamber 101, that is, the sliding valve core 3 can slide and rotate freely within the linear valve chamber 101; a frustoconical opening is provided at one end of the sliding valve core 3 near the outlet of the linear valve chamber 101, and a first spring 2 is connected between the sliding valve core 3 and the housing 1; one end of the first spring 2 is connected to the bottom surface of the linear valve chamber 101, and the other end is connected to the sliding valve core 3. The direction of the force of the first spring 2 is along the axial direction of the housing 1; when the sliding valve core 3 slides under external force, the first spring 2 stores energy; after the external force disappears, the first spring 2 pushes the sliding valve core 3 to reset. A central channel is axially arranged at the center of the sliding valve core 3, through which the central valve core 4 passes. The central valve core 4 is slidably and sealingly connected to the end of the central channel away from the frustoconical opening, leaving a medium channel 301 between the central valve core 4 and the remaining part of the central channel. The medium channel 301 is connected to the outlet of the frustoconical opening and the straight valve chamber 101. A plug 7 is connected to the end of the central valve core 4 adjacent to the frustoconical opening, and the other end is slidably connected to the housing 1. The plug 7 is used to change the flow direction of the liquid. The plug 7 is also a frustoconical structure, and the constricted end of the plug 7 is adapted to the shape and size of the constricted end of the frustoconical opening. Under normal conditions, the outer conical surface of the plug 7 forms an oblique flow channel with the frustoconical opening, causing the liquid to spray out radially. When blockage occurs, the plug 7 blocks the outer opening of the medium channel 301 to seal the medium channel 301.

[0016] The central valve core 4 is axially slidable but circumferentially non-rotatable relative to the housing 1. A second spring 6 with an axial force is connected between the central valve core 4 and the sliding valve core 3. The second spring 6 is sleeved on the outside of the central valve core 4. One end of the second spring 6 is connected to the plug 7, and the other end is connected to the central hole of the sliding valve core 3.

[0017] When the central valve core 4 slides under external force, the second spring 6 stores energy. After the external force disappears, the second spring 6 pushes the central valve core 4 to reset.

[0018] Specifically, the housing 1 is provided with a shaft hole, and a keyway is provided in the shaft hole. The keyway is connected to the central valve core 4 by a key, and the central valve core 4 slides in the shaft hole of the housing 1.

[0019] The housing 1 is provided with a medium channel 102, one end of which communicates with the outside, and the other end is connected to the medium passage 301 through the linear valve chamber 101. The medium channel 102 is located at the end of the housing 1 away from the outlet of the linear valve chamber 101. A self-cleaning channel 103 is also provided on the side of the housing 1, and the self-cleaning channel 103 is connected to the linear valve chamber 101. Correspondingly, the sliding valve core 3 is provided with a spiral groove 302 in the circumferential direction.

[0020] Under normal operating conditions, the outlet from the medium channel 102 to the medium passage 301 is open, the first spring 2 and the second spring 6 are released, and the self-cleaning channel 103 in the housing 1 is disconnected by the sliding valve core 3.

[0021] In the self-cleaning state, the plug 7 closes the outlet of the medium channel 301, the central valve core 4 and the sliding valve core 3 retract into the housing 1, the first spring 2 and the second spring 6 store energy, and the inflow and outflow sections of the self-cleaning channel 103 are connected through the spiral groove 302 on the sliding valve core 3, the medium flows through the spiral groove 302 and pushes the sliding valve core 3 to rotate.

[0022] To mitigate the vibration during the reset of the sliding valve core 3, a balance spring 5 is also included. The balance spring 5 is located at the end of the sliding valve core 3 away from the first spring 2. One end of the balance spring 5 is connected to the shoulder of the sliding valve core 3, and the other end is connected to the housing 1. When the first spring 2 pushes the sliding valve core 3 to reset, the balance spring 5 acts as a buffer to reduce the impact of the sliding valve core 3 on the housing 1.

[0023] Figure 1 For the self-cleaning and anti-clogging nozzle to be in normal working condition, the sliding valve core 3 is moved to the outlet end of the linear valve chamber 101 by the pressure of the first spring 2. The sliding valve core 3 closes the self-cleaning channel 103. Water enters the linear valve chamber 101 from the medium channel 102, and then enters the medium channel 301 through the hole on the sliding valve core 3, and then gushes out from the outlet of the medium channel 301.

[0024] Figure 2This is the state after the self-cleaning anti-clogging nozzle is blocked; the central valve core 4 is squeezed into the housing 1 by the coal body, and the outlet between the plug 7 and the medium channel 301 is blocked by coal slag. As the central valve core 4 is continuously squeezed, the sliding valve core 3 is also pressed back into the housing 1, and the first spring 2 and the second spring 6 are compressed and stored. At this time, the inflow section and the outflow section of the self-cleaning channel 103 are connected through the spiral groove 302 on the sliding valve core 3. The liquid flows through the spiral groove 302 on the sliding valve core 3, which causes the sliding valve core 3 to rotate. Since there is a key connection structure between the central valve core 4 and the housing 1, the central valve core 4 cannot rotate. Therefore, under the push of the fluid pressure, the coal slag adhering to the nozzle is torn apart by the relative rotational movement of the central valve core 4 and the sliding valve core 3. Once the nozzle and the coal wall are separated, fluid medium will be sprayed out from the nozzle to further dissolve the remaining adhering coal slag.

[0025] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all of these should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A cutting drum self-cleaning anti-blocking atomizing nozzle, characterized in that, It includes a housing (1), a sliding valve core (3), and a central valve core (4); a linear valve chamber (101) is provided inside the housing (1); an outlet is provided at one end of the linear valve chamber (101); the sliding valve core (3) is provided inside the linear valve chamber (101) and is slidably sealed to the inner wall of the linear valve chamber (101); the sliding valve core (3) is free in the axial and circumferential directions inside the linear valve chamber (101); an opening is provided at the end of the sliding valve core (3) adjacent to the outlet of the linear valve chamber (101); a first reset mechanism is connected between the sliding valve core (3) and the housing (1); A central channel is provided along the axial direction at the center of the sliding valve core (3). The central valve core (4) passes through the central channel of the sliding valve core (3). The central valve core (4) is slidably and sealed to the end of the central channel away from the outlet of the linear valve chamber (101). A medium channel (301) is left between the central valve core (4) and the rest of the central channel. The medium channel (301) is connected to the outlet of the linear valve chamber (101). A plug (7) is connected to the front end of the central valve core (4). The rear end of the central valve core (4) is axially and slidably connected to the housing (1). The central valve core (4) is not circumferentially rotatable relative to the housing (1). A second reset mechanism is connected between the central valve core (4) and the sliding valve core (3). The plug (7) is located at the opening of the sliding valve core (3). A medium channel (102) is provided at one end of the housing (1) away from the outlet of the linear valve chamber (101). One end of the medium channel (102) is connected to the outside, and the other end is connected to the medium passage (301) through the linear valve chamber (101). A self-cleaning channel (103) is provided on the side of the housing (1), and the self-cleaning channel (103) is connected to the linear valve chamber (101). A spiral groove (302) is provided around the sliding valve core (3). Under normal operating conditions, the outlet from the medium channel (102) to the medium passage (301) is opened, the first reset mechanism and the second reset mechanism are released, and the self-cleaning channel (103) of the housing (1) is disconnected by the sliding valve core (3); In the self-cleaning state, the plug (7) closes the medium channel (301), the central valve core (4) and the sliding valve core (3) retract into the housing (1), the first reset mechanism and the second reset mechanism store energy, the inflow and outflow sections of the self-cleaning channel (103) are connected through the spiral groove (302) on the sliding valve core (3), the medium flows through the spiral groove (302) and pushes the sliding valve core (3) to rotate; under the push of fluid pressure, the impurities adhering to the nozzle are impacted by the relative rotational motion of the central valve core (4) and the sliding valve core (3); The opening of the sliding valve core (3) is a frustum-shaped opening, and the plug (7) is also a frustum-shaped structure. The constricted end of the plug (7) is adapted to the shape and size of the constricted end of the frustum-shaped opening. Under normal working conditions, the outer conical surface of the plug (7) and the frustum-shaped opening form an oblique flow channel, so that the liquid is sprayed out radially. When blockage occurs, the plug (7) blocks the outer opening of the medium channel (301) to block the medium channel (301).

2. The self-cleaning, anti-clogging atomizing nozzle for a cutting drum according to claim 1, characterized in that, The first reset mechanism is a first spring (2). One end of the first spring (2) is connected to the bottom surface of the linear valve chamber (101), and the other end is connected to the sliding valve core (3). The direction of the force of the first spring (2) is along the axial direction of the housing (1). When the sliding valve core (3) is slid under the external force, the first spring (2) stores energy. After the external force disappears, the first spring (2) pushes the sliding valve core (3) to reset.

3. The self-cleaning, anti-clogging atomizing nozzle for a cutting drum according to claim 2, characterized in that, It also includes a balance spring (5), which is located at the end of the sliding valve core (3) away from the first spring (2). One end of the balance spring (5) is connected to the shoulder of the sliding valve core (3), and the other end is connected to the housing (1). The balance spring (5) is used to reduce the impact of the sliding valve core (3) on the housing (1) when resetting.

4. The self-cleaning, anti-clogging atomizing nozzle for a cutting drum according to claim 1, characterized in that, The second reset mechanism is a second spring (6), which is sleeved on the outside of the central valve core (4). One end of the second spring (6) is connected to the plug (7), and the other end is connected to the central hole of the sliding valve core (3). When the central valve core (4) is subjected to external force, the second spring (6) stores energy. After the external force disappears, the second spring (6) pushes the central valve core (4) to reset.

5. The self-cleaning, anti-clogging atomizing nozzle for a cutting drum according to claim 1, characterized in that, The housing (1) is provided with a shaft hole, and a keyway is provided in the shaft hole. The keyway is connected to the central valve core (4) by a key.

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