A double-explosion pulse cleaning device

Abstract

The embodiment of the present invention discloses a double-explosion pulse cleaning device, comprising a cylinder having a front explosion chamber, an explosion venting chamber, and a rear explosion chamber sequentially formed along the axial direction, and pipe flange covers at both ends of the sealing cylinder, and the explosion venting chamber is connected to an explosion venting port extending to the outside, and a piston capable of sealing the explosion venting port is provided in the explosion venting chamber; wherein the piston is movable along the axial direction in the explosion venting chamber; the front explosion chamber and the rear explosion chamber are each connected to a detonating assembly, and detonating any one of the detonating assemblies can push the piston toward one end and open the explosion venting port. The present invention completes double-explosion pulse cleaning based on a piston seal through a simple structural setting, and the two explosion pulse cleanings use the same explosion venting port, further increasing the pulse pressure peak of the second explosion, thereby effectively realizing the superposition of pulse pressures and better improving the cleaning effect.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of explosive dust cleaning, and in particular to a double-explosive pulse dust cleaning device. Background Art

[0002] Currently, since most fuels are still unclean, they easily accumulate large amounts of ash after combustion, which is often difficult to remove with even light force. Consequently, the cleaning process requires significant manpower and resources, and consumes considerable time and effort. This is not only time-consuming and labor-intensive, but also expensive. Especially for equipment in continuous use, ash cleaning directly impacts production efficiency and places an additional burden on production costs.

[0003] In the prior art, a common device for dust cleaning using explosive pulses generally explodes once and cleans the accumulated dust based on the pulse generated by the explosion.

[0004] Although some prior art methods utilize multiple explosive pulses for dust cleaning, such as patent number CN102563672B, which discloses a pulse detonation cleaning system, the technical solution comprises: a common pipe fluidly connected to a container; a first array of multiple elongated detonators disposed upstream of and fluidly connected to the interior of the common pipe; and a second array of initiators, each disposed upstream of and operably connected to a corresponding detonator in the plurality of detonators, such that actuation of each detonator in the plurality of detonators causes combustion in the corresponding detonator in the plurality of detonators. However, such an arrangement requires the installation of multiple detonators, each of which is independently controlled, and each of which has independent direct outlets after detonation. This arrangement does not allow for multiple pulses from the same pipe, nor does it allow for the instantaneous discharge of the maximum pulse generated immediately after detonation. Summary of the Invention

[0005] To this end, an embodiment of the present invention provides a double-explosion pulse cleaning device, which, through a simple structural setting, completes double-explosion pulse cleaning based on a piston seal. Moreover, the two explosion pulse cleanings use the same explosion vent, further increasing the pulse pressure peak of the second explosion, thereby effectively realizing the superposition of pulse pressures and better improving the cleaning effect.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] In one aspect of an embodiment of the present invention, a double-explosion pulse dust cleaning device is provided, comprising a cylinder having a front explosion chamber, a venting chamber, and a rear explosion chamber sequentially formed along an axial direction, and a pipe flange cover sealing both ends of the cylinder, wherein the venting chamber is connected to an explosion vent extending to the outside, and a piston capable of sealing the explosion vent is provided in the venting chamber; wherein,

[0008] The piston is movable along the axial direction in the explosion relief chamber;

[0009] The front explosion chamber and the rear explosion chamber are each connected to each other and are provided with a detonating assembly. Detonating any one of the detonating assemblies can push the piston to move toward one end and open the explosion vent.

[0010] As a preferred solution of the present invention, the front explosion chamber and the explosion relief chamber, as well as the rear explosion chamber and the explosion relief chamber are connected through a throat structure, and the diameter of the throat structure gradually increases from the center to both ends along the axial direction;

[0011] The diameters of both ends of the throat structure are no greater than the diameter of the adjacent front explosion chamber, the explosion relief chamber or the rear explosion chamber.

[0012] As a preferred solution of the present invention, the diameter of the end of the throat structure close to the explosion relief chamber is smaller than the outer diameter of the end of the piston.

[0013] As a preferred solution of the present invention, the piston includes a body with both ends respectively recessed inward to form an inner cavity, and a sealing assembly located on the outer circumferential surface of the body and close to both ends of the body.

[0014] As a preferred solution of the present invention, the sealing assembly includes a copper ring and a rubber sealing ring arranged in sequence from the end to the center along the axial direction.

[0015] As a preferred solution of the present invention, the cylinder body is composed of a group of half-cylinder structures butt-connected along the axial direction, and the connecting parts of the two half-cylinder structures are located on the explosion relief chamber, and the connecting parts of the two half-cylinder structures extend outward to form the explosion relief port.

[0016] As a preferred embodiment of the present invention, each group of the detonating components comprises a detonating gas supply structure and an ignition electrode communicated with the front explosion chamber or the rear explosion chamber; and

[0017] The detonation gas supply structure at least includes a fuel gas supply unit and a combustion-supporting gas supply unit.

[0018] As a preferred solution of the present invention, a shock absorbing assembly movable along the axial direction is further provided on the outside of the cylinder, and the shock absorbing assembly buffers and reduces vibrations on the end where the front explosion chamber is located or the end where the rear explosion chamber is located by moving.

[0019] As a preferred solution of the present invention, the shock absorbing assembly includes a bracket fixedly connected to the cylinder, and a movable shock absorbing structure movably arranged on the bracket; wherein,

[0020] The movable shock-absorbing structure includes a movable part movably mounted on the bracket along the axial direction, and a shock-absorbing spring with one end connected to the movable part and the other end extending toward the outer surface of the cylinder. An arc-shaped contact plate is connected to the end of the shock-absorbing spring close to the cylinder.

[0021] As a preferred solution of the present invention, there are multiple movable shock-absorbing structures, and the multiple movable shock-absorbing structures are arranged at intervals along the circumferential direction;

[0022] Each of the movable shock-absorbing structures is provided with a plurality of shock-absorbing springs, and the elastic direction of the shock-absorbing springs extends radially.

[0023] The embodiments of the present invention have the following advantages:

[0024] The dual-explosion pulse cleaning device of the present invention can clean dust through two consecutive explosions, and the second explosion has a higher pulse pressure peak, which is more conducive to improving the cleaning effect. Furthermore, the technical solution of the present invention has a simple structure and convenient cleaning operation, which can greatly improve the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0027] Figure 1 A cross-sectional view of a double-explosion pulse cleaning device provided in an embodiment of the present invention;

[0028] Figure 2 A front view of a double-explosion pulse cleaning device provided in an embodiment of the present invention;

[0029] Figure 3 A side view of a double-explosion pulse cleaning device provided in an embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of a piston provided in an embodiment of the present invention;

[0031] Figure 5A A schematic structural diagram of a piston in a first position after ignition of a front explosion chamber according to an embodiment of the present invention;

[0032] Figure 5B A schematic structural diagram of the piston in the second position after the front explosion chamber is ignited according to an embodiment of the present invention;

[0033] Figure 5C A schematic structural diagram of the piston in the third position after the front explosion chamber is ignited according to an embodiment of the present invention;

[0034] Figure 6A A schematic structural diagram of a piston in a first position after ignition of a post-explosion chamber according to an embodiment of the present invention;

[0035] Figure 6B A schematic structural diagram of the piston in the second position after the post-explosion chamber is ignited according to an embodiment of the present invention;

[0036] Figure 6C A schematic structural diagram of the piston in the third position after the post-explosion chamber is ignited according to an embodiment of the present invention;

[0037] Figure 7 A partial side view of a double-explosion pulse cleaning device provided in another embodiment of the present invention;

[0038] Figure 8 A partial front view of a double-explosion pulse cleaning device provided in another embodiment of the present invention.

[0039] In the picture:

[0040] 1-front explosion chamber; 2-rear explosion chamber; 3-piston; 4-tube flange cover; 5-throat structure; 6-cylinder; 7-explosion vent; 8-connector; 9-convex flange; 10-concave flange; 11-ignition electrode; 12-copper ring; 13-rubber sealing ring; 14-ignition spark; 15-piston skirt; 16-piston top; 17-bracket; 18-moving part; 19-shock-absorbing spring; 20-arc contact plate. DETAILED DESCRIPTION

[0041] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0042] The following further describes specific embodiments of the present invention with reference to the accompanying drawings. It should be noted that the terms "before" and "after" in the names of the front explosion chamber 1 and the rear explosion chamber 2 generally refer to the time before and after the explosion. That is, under normal circumstances, the premixed gas in the front explosion chamber 1 is ignited before the premixed gas in the rear explosion chamber 2, triggering the explosion.

[0043] like Figures 1-8 As shown, the double explosion pulse cleaning device provided by the present invention is mainly composed of a front explosion chamber 1, a rear explosion chamber 2, a piston 3, etc. The front explosion chamber 1 and the rear explosion chamber 2 are connected by a concave flange 10 and a convex flange 9. The two are detachable structures. An explosion relief chamber is formed between the front explosion chamber 1 and the rear explosion chamber 2, that is, the connecting part of the front explosion chamber 1 and the rear explosion chamber 2 is located at the explosion relief chamber. The center line of the hole of the explosion relief port 7 coincides with the center of the junction of the concave flange 10 and the convex flange 9. The midpoint of the piston skirt 15 on the piston 3 (that is, the side wall of the piston 3) coincides with the center of the hole of the explosion relief port 7. An annular groove is provided on the piston 3, and copper rings 12 are arranged at both ends. Two O-shaped rubber sealing rings 13 are arranged on the inner side of the two copper rings 12 to seal the explosion relief port 7 to prevent medium-pressure or high-pressure premixed gas from leaking from the explosion relief port 7.

[0044] Furthermore, two sealing rings may be provided on both sides of the explosion vent 7 .

[0045] In a more preferred embodiment, to specifically adapt the movement of piston 3 based on sequential explosions, thereby improving piston 3's movement and, consequently, dust cleaning efficiency, the piston crown 16 of piston 3 is offset, rather than having its end align with the midpoint of the outer wall of piston skirt 15. In a more preferred embodiment, piston crown 16 is offset toward the front explosion chamber 1, making the front explosion chamber 1 smaller than the rear explosion chamber 2. That is, when piston crown 16 of piston 3 coincides with the exact center of explosion vent 7, the combined volume of the explosion vent and front explosion chamber 1 located near the front explosion chamber 1 of piston 3 is smaller than the combined volume of the explosion vent and rear explosion chamber 2 located near the rear explosion chamber 2. This arrangement allows for a greater peak pressure impulse when the rear explosion chamber 2 explodes than when the front explosion chamber 1 explodes. Furthermore, due to the sudden drop in pressure within the front explosion chamber 1 after the explosion, piston 3 moves faster toward the front explosion chamber 1, allowing the explosion vent to open more quickly.

[0046] In a more specific embodiment, the front explosion chamber 1 comprises a partial cylinder 6, a pipe flange cover 4, and other components. The cylinder 6 has a thickened wall surface at the end where it connects to the pipe flange cover 4. An ignition electrode 11 is provided on the pipe flange cover 4 to which the front explosion chamber 1 connects. Similarly, the rear explosion chamber 2 comprises a partial cylinder 6, a pipe flange cover 4, and other components. The cylinder 6 has a thickened wall surface at the end where it connects to the pipe flange cover 4. An ignition electrode 11 is provided on the pipe flange cover 4 to which the rear explosion chamber 2 connects.

[0047] In a more preferred embodiment of the present invention, a throat structure 5 is arranged near the piston 3 in the front explosion chamber 1. The throat structure 5 plays a throttling role, thereby improving the pulse effect of the explosion in the front explosion chamber 1. Similarly, a throat structure 5 is arranged near the piston 3 in the rear explosion chamber 2. The throat structure 5 plays a throttling role, thereby improving the pulse effect of the explosion in the rear explosion chamber 2.

[0048] On the wall surface of the cylinder 6 on both sides of the throat structure 5 of the front explosion chamber 1, each is connected with a joint 8. The two joints 8 are respectively a gas inlet (for providing gas) and an oxygen or compressed air inlet (for providing combustion-supporting gas). Similarly, on the wall surface of the cylinder 6 on both sides of the throat structure 5 of the rear explosion chamber 2, each is connected with a joint 8. The two joints 8 are respectively a gas inlet and an oxygen or compressed air inlet. It is also possible to use only the joint 8 at the far end of the piston 3 to connect the tee to respectively enter the gas and oxygen or compressed air. The joint 8 at the proximal end of the piston 3 is specifically used to check the reset results of the piston 3 after the two explosions of the front explosion chamber 1 and the rear explosion chamber 2.

[0049] See Figures 5A-5C , is a diagram of the movement process of the pistons in the front explosion chamber 1 and the rear explosion chamber 2 in the technical solution of the present invention. Before the front explosion chamber 1 ignites and explodes, the midpoint of the outer wall of the piston skirt 15 of the piston 3 is on the surface where the convex flange 9 and the concave flange 10 on the front explosion chamber 1 and the rear explosion chamber 2 are connected. The front explosion chamber 1 and the rear explosion chamber 2 are both filled with medium-pressure or high-pressure mixed gas; the front explosion chamber 1 is ignited (forming an ignition spark 14) by the ignition electrode 11 on the pipe flange cover 4 connected to it, and the explosion pulse drives the piston 3 to move toward the rear explosion chamber 2 until the end face of the piston skirt 15 at the front explosion chamber 1 end of the piston 3 opens to fully open the explosion vent 7, and the end face of the piston skirt 15 close to the rear explosion chamber 2 side coincides with the end face of the throat structure 5 of the rear explosion chamber 2. The piston 3 stops moving, and the explosion pulse of the front explosion chamber 1 is output to the cleaning space through the explosion vent 7, which is the first wave of explosion pulse cleaning process.

[0050] After the first wave of explosion pulses occurs, the rear explosion chamber 2 is ignited (forming an ignition spark 14) by the ignition electrode 11 on the pipe flange cover 4 connected to it, and explodes. The explosion pulse drives the piston 3 to move toward the front explosion chamber 1. Since the front explosion chamber 1 has already exploded and vented, the pressure on the piston top 16 on the front explosion chamber 1 side is close to zero, the opening speed of the piston 3 increases, and the end face of the piston skirt 15 close to the front explosion chamber 1 quickly coincides with the end face of the throat structure 5 of the front explosion chamber 1. The piston 3 stops moving, and the explosion vent 7 is opened for the second time. The explosion pulse of the rear explosion chamber 2 is output to the cleaning space through the explosion vent 7, which is the second wave of explosion pulse cleaning process.

[0051] After the second wave of explosion pulse cleaning process is completed, air is introduced through the two or one air inlet joints 8 of the front explosion chamber 1 to reset the piston 3. After the piston 3 resets, the front explosion chamber 1 and the rear explosion chamber 2 maintain the same pressure to complete the intake of premixed fuel gas through the joint 8. When the chemical equivalence ratio of the fuel gas is 1, the best explosion effect can be achieved. It should be noted that after the piston 3 is reset, the front explosion chamber 1 and the rear explosion chamber 2 further enter the fuel gas and oxygen or air at the same pressure, so that the pressure on both sides of the piston top 16 can be kept consistent, preventing the piston 3 from moving and causing sealing failure.

[0052] In a more preferred embodiment of the present invention, since the two-wave explosion pulse process is carried out in sequence, in order to better and more targetedly buffer the corresponding parts and avoid the impact of the unbalanced vibration caused by long-term unilateral explosion on the device, Figure 7 and Figure 8As shown, a shock-absorbing assembly capable of moving along the axial direction is also provided on the outside of the cylinder 6. The shock-absorbing assembly cushions and reduces shocks at one end where the front explosion chamber 1 or the rear explosion chamber 2 is located by moving. Specifically, the shock-absorbing assembly includes a bracket 17 fixedly connected to the cylinder 6, and a movable shock-absorbing structure movably provided on the bracket 17; wherein the movable shock-absorbing structure includes a movable portion 18 movably mounted on the bracket 17 along the axial direction, and a shock-absorbing spring 19 having one end connected to the movable portion 18 and the other end extending toward the outer surface of the cylinder 6, wherein the end of the shock-absorbing spring 19 close to the cylinder 6 is connected to an arc-shaped contact plate 20. There are multiple movable shock-absorbing structures, and the multiple movable shock-absorbing structures are arranged at intervals along the circumferential direction; each movable shock-absorbing structure has multiple shock-absorbing springs 19, and the elastic direction of the shock-absorbing spring 19 extends radially. It should be noted that the movement of the movable portion 18 on the bracket 17 can be achieved by methods that are readily understood and used by those skilled in the art. For example, the movable portion 18 can be driven by a drive structure, such as a lead screw driven by a rotating motor. Furthermore, slideways and slide seats can be formed on the movable portion 18 and the bracket 17, respectively. Similar structures known and used by those skilled in the art can be used herein, and the present invention will not be elaborated on in detail.

[0053] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A double explosion pulse cleaning device, characterized in that: The invention comprises a cylinder (6) having a front explosion chamber (1), an explosion relief chamber and a rear explosion chamber (2) sequentially formed along an axial direction, and a pipe flange cover (4) sealing both ends of the cylinder (6), wherein the explosion relief chamber is connected to an explosion relief port (7) extending to the outside, and a piston (3) capable of sealing the explosion relief port (7) is provided in the explosion relief chamber; wherein, The piston (3) is movable along the axial direction in the explosion relief chamber; The front explosion chamber (1) and the rear explosion chamber (2) are each connected to each other and provided with an initiating assembly, and detonating any one of the initiating assemblies can push the piston (3) toward one end and open the explosion vent (7); The front explosion chamber (1) and the explosion relief chamber, as well as the rear explosion chamber (2) and the explosion relief chamber are communicated via a throat structure (5), and the diameter of the throat structure (5) gradually increases from the center to both ends along the axial direction; The diameters of both ends of the throat structure (5) are no greater than the diameters of the adjacent front explosion chamber (1), the explosion relief chamber, or the rear explosion chamber (2).

2. The double explosion pulse cleaning device according to claim 1 is characterized in that: The diameter of one end of the throat structure (5) close to the explosion relief chamber is smaller than the outer diameter of the end of the piston (3).

3. A double explosion pulse cleaning device according to claim 1 or 2, characterized in that: The piston (3) comprises a body with both ends respectively recessed inwards to form an inner cavity, and a sealing assembly located on the outer peripheral surface of the body and close to both ends of the body.

4. The double explosion pulse cleaning device according to claim 3 is characterized in that: The sealing assembly comprises a copper ring (12) and a rubber sealing ring (13) arranged in sequence from the end to the center along the axial direction; The recessed depths of the inner cavities at both ends of the piston (3) are different, and the depth of the inner cavity at the end close to the rear explosion chamber (2) is smaller than the depth of the inner cavity at the end close to the front explosion chamber (1).

5. A double explosion pulse cleaning device according to claim 1 or 2, characterized in that: The cylinder (6) is composed of a group of half-cylinder structures butted together in the axial direction, and the connecting parts of the two half-cylinder structures are located on the explosion relief chamber, and the connecting parts of the two half-cylinder structures extend outward to form the explosion relief port (7).

6. A double explosion pulse cleaning device according to claim 1 or 2, characterized in that: Each group of the detonating components comprises a detonating gas supply structure and an ignition electrode (11) communicating with the front detonation chamber (1) or the rear detonation chamber (2); and The detonation gas supply structure at least includes a fuel gas supply unit and a combustion-supporting gas supply unit.

7. The double explosion pulse cleaning device according to claim 5, characterized in that: A shock absorbing component capable of moving along the axial direction is also provided on the outside of the cylinder (6), and the shock absorbing component performs buffering and shock reduction on the end where the front explosion chamber (1) is located or the end where the rear explosion chamber (2) is located by moving.

8. The double explosion pulse cleaning device according to claim 7 is characterized in that: The shock absorbing assembly comprises a bracket (17) fixedly connected to the cylinder (6), and a movable shock absorbing structure movably arranged on the bracket (17); wherein, The movable shock-absorbing structure comprises a movable portion (18) movably mounted on the bracket (17) along an axial direction, and a shock-absorbing spring (19) having one end connected to the movable portion (18) and the other end extending toward the outer surface of the cylinder (6), wherein the end of the shock-absorbing spring (19) close to the cylinder (6) is connected to an arc-shaped contact plate (20).

9. The double explosion pulse cleaning device according to claim 8, characterized in that: There are multiple movable shock-absorbing structures, and the multiple movable shock-absorbing structures are arranged at intervals along the circumferential direction; Each of the movable shock-absorbing structures is provided with a plurality of shock-absorbing springs (19), and the elastic direction of the shock-absorbing springs (19) extends radially.

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