A multi-pulse explosion cleaning device

Abstract

The embodiment of the present invention discloses a multi-pulse explosion cleaning device and a multi-pulse explosion cleaning method, the cleaning device includes a mounting portion, a plurality of explosion chambers mounted on the mounting portion, a group of explosion tubes connected to each of the explosion chambers, a combustion gas supply mechanism connected to a portion of each group of explosion tubes, and a combustion-supporting gas supply mechanism connected to another portion of each group of explosion tubes; wherein, the explosion vent is sealed by a piston in the explosion chamber, and one end of the explosion chamber is formed as a release end; each explosion chamber is connected to an ignition electrode, and the plurality of ignition electrodes are ignited simultaneously or at different times, so that the plurality of explosion chambers are detonated simultaneously or at different times and the explosion vent is opened. The present invention can more freely control the blasting time point by coordinating the plurality of explosion chambers and blasting them simultaneously or at different times, and solves the ash cleaning operation of various types of dust accumulation equipment based on the different superposition methods of the blasting impact force.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of explosive dust cleaning, and in particular to a multi-pulse explosive 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 addition to traditional manual and mechanical cleaning methods, blasting has also emerged. For example, patent (CN1839001A) discloses a method and apparatus for generating air pressure pulses in a dust cleaning device. This device delivers combustible gas and oxygen into a typically elongated combustion chamber, ignites the mixed gas, and generates a pressure pulse, which is then released from the combustion chamber and directed.

[0004] Although this method can achieve a certain dust cleaning effect through blasting, the dust accumulation of the equipment during long-term use is not formed in one day, and the types of dust accumulated are also different. Therefore, this one-time blasting method cannot be used for all equipment. At the same time, the dust cleaning effect often has certain limitations. Summary of the Invention

[0005] To this end, the embodiments of the present invention provide a multi-pulse explosion cleaning device and a multi-pulse explosion cleaning method, which adopt a combustion gas providing mechanism and a combustion-supporting gas providing mechanism to provide corresponding gases to the explosion tube, which can effectively control the chemical equivalent of the gas for combustion, and thus obtain the most suitable pulse pressure. At the same time, through the coordinated setting of multiple explosion chambers, simultaneous or staggered blasting can be carried out, and the blasting time point can be controlled more freely. Based on the different superposition methods of the blasting impact force, the cleaning operations of various types of dust accumulation equipment can be solved in a targeted manner.

[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 multi-pulse explosion cleaning device is provided, comprising a mounting portion, a plurality of explosion chambers mounted on the mounting portion, a set of squibs communicating with each of the explosion chambers, a combustion gas supply mechanism communicating with a portion of each set of squibs, and a combustion-supporting gas supply mechanism communicating with another portion of each set of squibs; wherein,

[0008] In the explosion chamber, the explosion vent is sealed by a piston, and one end of the explosion chamber is formed as a release end;

[0009] Each explosion chamber is respectively connected with an ignition electrode. By igniting simultaneously or at different times through multiple ignition electrodes, multiple explosion chambers are detonated simultaneously or at different times to open the explosion vent.

[0010] As a preferred embodiment of the present invention, each group of the counter-explosion tubes is at least one pair, and the axes of each pair of counter-explosion tubes are on the same straight line. One of a pair of counter-explosion tubes is connected to the combustion gas supply mechanism, and the other is connected to the combustion-supporting gas supply mechanism.

[0011] As a preferred embodiment of the present invention, the ratio of the length to the diameter of the counter-explosion tube in the axial direction is not less than 15.

[0012] As a preferred embodiment of the present invention, the axes of multiple explosion chambers are arranged in parallel, and;

[0013] An included angle α is formed between the axial direction of the counter-explosion tube and the axial direction of the explosion chamber, and 90° ≥ α ≥ 45°.

[0014] As a preferred embodiment of the present invention, the combustion gas supply mechanism includes a gas ring pipe formed as a ring;

[0015] The combustion-supporting gas supply mechanism includes an auxiliary gas ring pipe formed as a ring;

[0016] And the gas ring pipe and the auxiliary gas ring pipe are respectively connected to the counter-explosion tube through solenoid valves.

[0017] As a preferred embodiment of the present invention, there are three explosion chambers, and the cross-sections of multiple explosion chambers are arranged in a "pin" shape.

[0018] As a preferred embodiment of the present invention, the part of the explosion chamber close to the release end is formed as a flared structure, and the inner diameter of the flared structure gradually increases from the end far from the release end to the end close to the release end;

[0019] The flared structure is located outside one end of the piston.

[0020] As a preferred embodiment of the present invention, the explosion chamber includes a central explosion chamber at the center and peripheral explosion chambers arranged around the central explosion chamber in the circumferential direction.

[0021] As a preferred embodiment of the present invention, the number of counter-explosion tubes connected to the central explosion chamber is greater than the number of counter-explosion tubes connected to the peripheral explosion chambers;

[0022] Preferably, the axial direction of the peripheral explosion chamber forms an angle with the axial direction of the central explosion chamber, and the peripheral explosion chamber extends obliquely outward from an end away from the release end to the release end.

[0023] In another aspect of the embodiments of the present invention, a multi-pulse explosion cleaning method is provided, which uses the multi-pulse explosion cleaning device described above. The multi-pulse explosion cleaning method includes:

[0024] S100, preset detonation parameters, and introduce corresponding combustion gas or combustion-supporting gas into each squib according to the preset detonation parameters;

[0025] S200: According to the detonation requirements, detonate each corresponding explosion chamber simultaneously or at different times to complete the explosion cleaning.

[0026] The embodiments of the present invention have the following advantages:

[0027] 1. The time intervals between explosions of multiple explosion chambers can be freely set, so that they can explode simultaneously or one by one in sequence, thereby realizing the sequential or superposition of multiple waves of explosion impact force. Moreover, in the superposition, based on the different interval times, the superposition of impact strength also varies, so that it can better adapt to different types of equipment to be cleaned and achieve the maximum cleaning effect.

[0028] 2. The introduction of the setting of the explosion pipe can provide a gas storage channel with suitable parameters for the gas required for the explosion, so that a larger explosion pulse pressure peak can be generated after the explosion occurs, thereby better improving the dust cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] 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.

[0031] Figure 1 A schematic structural diagram of a multi-pulse explosion cleaning device provided in Example 1 of the present invention;

[0032] Figure 2 This is a front view of the multi-pulse explosion cleaning device provided in Example 1 of the present invention;

[0033] Figure 3 A top view of the multi-pulse explosion cleaning device provided in Example 1 of the present invention;

[0034] Figure 4 A side view of the multi-pulse explosion cleaning device provided in Example 1 of the present invention;

[0035] Figure 5 A cross-sectional view of the front explosion chamber provided in Example 1 of the present invention;

[0036] Figure 6 A cross-sectional view of the intermediate explosion chamber provided in Example 1 of the present invention;

[0037] Figure 7 A cross-sectional view of the post-explosion chamber provided in Example 1 of the present invention;

[0038] Figure 8 A schematic structural diagram of a piston provided in Example 1 of the present invention;

[0039] Figure 9 A schematic structural diagram of a multi-pulse explosion cleaning device provided in Example 2 of the present invention;

[0040] Figure 10 This is a front view of the multi-pulse explosion cleaning device provided in Example 2 of the present invention;

[0041] Figure 11 A top view of a multi-pulse explosion cleaning device provided in Example 2 of the present invention;

[0042] Figure 12 A cross-sectional view of the front explosion chamber of the multi-pulse explosion cleaning device provided in Example 2 of the present invention;

[0043] Figure 13 A cross-sectional view of the middle explosion chamber of the multi-pulse explosion cleaning device provided in Example 2 of the present invention;

[0044] Figure 14 A cross-sectional view of the post-explosion chamber of the multi-pulse explosion cleaning device provided in Example 2 of the present invention;

[0045] Figure 15 A schematic structural diagram of a multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0046] Figure 16 This is a front view of the multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0047] Figure 17A top view of a multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0048] Figure 18 A side view of a multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0049] Figure 19 A cross-sectional view of the front explosion chamber of the multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0050] Figure 20 A cross-sectional view of the middle explosion chamber of the multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0051] Figure 21 A cross-sectional view of the post-explosion chamber of the multi-pulse explosion cleaning device provided in Example 3 of the present invention;

[0052] Figure 22 A schematic structural diagram of a multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0053] Figure 23 A front view of a multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0054] Figure 24 A top view of a multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0055] Figure 25 A side view of a multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0056] Figure 26 A cross-sectional view of the front explosion chamber of the multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0057] Figure 27 A cross-sectional view of the middle explosion chamber of the multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0058] Figure 28 A cross-sectional view of the post-explosion chamber of the multi-pulse explosion cleaning device provided in Example 4 of the present invention;

[0059] Figure 29 A schematic diagram of the partial structure of a multi-pulse explosion cleaning device provided in Example 5 of the present invention;

[0060] Figure 30 This is a cross-sectional view of the explosion chamber of the multi-pulse explosion cleaning device provided in Example 5 of the present invention.

[0061] In the picture:

[0062] 100- explosion chamber; 200- combustion gas supply mechanism; 300- combustion-supporting gas supply mechanism;

[0063] 1-Gas ring pipe; 2-Combustion-supporting gas ring pipe; 3-Front explosion chamber; 4-Middle explosion chamber; 5-Rear explosion chamber; 6-Ignition electrode; 7-Solenoid valve; 8-Connecting plate; 9-Inlet joint; 10-Connecting pipe; 11-Dual explosion pipe; 12-Flat cover; 13-Front explosion chamber body; 14-Piston; 15-Gas spring chamber; 16-Bell mouth structure; 17-Ignition electrode joint; 18-Middle explosion chamber body; 19-Rear explosion chamber body; 20-Piston cavity; 21-Copper ring; 22-O-ring rubber sealing ring; 23-Ring groove; 24-Piston top; 25-Piston large skirt; 26-Piston small skirt; 27-Piston end face; 28-Gas spring flat cover; 29-Center explosion chamber; 30-Peripheral explosion chamber. DETAILED DESCRIPTION

[0064] 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.

[0065] The technical solution of the present invention is further described below through specific embodiments in conjunction with the accompanying drawings.

[0066] Example 1

[0067] Attachment Figure 1-8 It is a structural schematic diagram of the dust cleaning device using a triple pulse explosion method in the present invention, and each explosion chamber 100 (since it is a triple type, there are three explosion chambers 100, named as the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5) is equipped with two positive explosion tubes 11 (that is, the axis of the explosion tube 11 is 90° to the axis of the explosion chamber 100, and the two are in a vertical state, then it is a positive explosion tube 11).

[0068] Both the gas ring pipe 1 and the auxiliary gas ring pipe 2 are hollow annular pipe structures. The gas ring pipe 1 is filled with high-pressure or medium-pressure gas, and the auxiliary gas ring pipe 2 is filled with high-pressure or medium-pressure oxygen or compressed air. The gas ring pipe 1 supplies high-pressure or medium-pressure gas to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. Similarly, the auxiliary gas ring pipe 2 supplies high-pressure or medium-pressure oxygen or compressed air to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. The central lines of the gas ring pipe 1 and the auxiliary gas ring pipe 2 and the center of the connecting plate 8 (i.e., the installation part for installing the explosion chamber 100) coincide. The connecting plate 8 is arranged in the front, with the gas ring pipe 1 in the middle and the auxiliary gas ring pipe 2 in the rear. An air inlet joint 9 is arranged on the gas ring pipe 1 and is connected to the gas source pipeline; an air inlet joint 9 is arranged on the auxiliary gas ring pipe 2 and is connected to the oxygen or air source pipeline.

[0069] As can be seen from the appendix Figure 2 The front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 are in a "pin" shape. The front explosion chamber 3 is on the right side of the "pin", the middle explosion chamber 4 is on the top of the "pin", and the rear explosion chamber 5 is on the left side of the "pin". The orientation names "front", "middle", and "rear" here actually refer to the distance from the center of the counter-explosion pipe 11 connected to each explosion chamber to the connecting plate 8. The closer one is "front", the second is "middle", and the farther one is "rear".

[0070] Appendix Figure 5In it, the front explosion chamber 3 is a closed space composed of two symmetrically arranged explosion tubes 11, a piston 14, the front explosion chamber body 13 (i.e., the pipe part of the entire explosion chamber 100), an O-ring rubber seal 22, etc. The included angle between the center line of each explosion tube 11 and the center line of the front explosion chamber body 13 is α = 90°. The front end of the front explosion chamber body 13 is a flared structure 16 (i.e., the front explosion chamber body 13 is divided into two parts by the piston 14, one part is named the front end, and the other part is named the rear end). The rear end of the front explosion chamber body 13 is that the piston top 24 of the piston 14, the air spring flat cover 28, and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber 15 is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. At a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13, symmetrically arranged and equally long explosion tubes 11 are provided, and the other ends of the explosion tubes 11 are closed with flat covers 12. For the explosion tube 11 that is connected to the front explosion chamber 3 and needs to be connected to the side of the front explosion chamber body 13 located inside the "pin" character, it can pass through the exact middle of the connection line between the two tubes of the middle explosion chamber body 18 and the rear explosion chamber body 19 that form the "pin" character and then be connected to the front explosion chamber body 13. The opposite explosion tube 11 (i.e., the other explosion tube 11 connected to the front explosion chamber 3) is symmetrically arranged in the reverse direction, and at the same time, the distal end of the explosion tube 11 arranged in the reverse direction is closed with a flat cover 12. An ignition electrode joint 17 is provided at a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13 to connect the ignition electrode 6.

[0071] Appendix Figure 6 In it, the middle explosion chamber 4 is a closed space composed of two symmetrically arranged explosion tubes 11, a piston 14, the middle explosion chamber body 18, and an O-ring rubber seal 22, etc. The included angle between the center line of each explosion tube 11 and the center line of the middle explosion chamber body 18 is α = 90°. The front end of the middle explosion chamber body 18 is a flared structure 16, and the rear end of the middle explosion chamber body 18 is that the piston top 24 of the piston 14, the air spring flat cover 28, and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. At a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18, symmetrically arranged and equally long explosion tubes 11 are provided, and the other ends of the explosion tubes 11 are closed with flat covers 12. For the explosion tube 11 that is connected to the middle explosion chamber and needs to be connected to the side of the middle explosion chamber body 18 located inside the "pin" character, it passes through the exact middle of the connection line between the two tubes of the rear explosion chamber body 19 and the front explosion chamber body 13 that form the "pin" character. The opposite explosion tube 11 (i.e., the other explosion tube 11 connected to the middle explosion chamber 4) is symmetrically arranged in the reverse direction, and at the same time, the distal end of the explosion tube 11 arranged in the reverse direction is closed with a flat cover 12. An ignition electrode joint 17 is provided at a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18 to connect the ignition electrode 6.

[0072] Appendix Figure 7 In it, the rear explosion chamber 5 is a closed space composed of two symmetrically arranged counter-explosion tubes 11, a piston 14, a rear explosion chamber body 19, an O-shaped rubber seal ring 22, etc. The included angle between the center line of each counter-explosion tube 11 and the center line of the rear explosion chamber body 19 is α = 90°. The front end of the rear explosion chamber body 19 is a flared structure 16, and the rear end of the rear explosion chamber body 19 is that the piston top 24 of the piston 14, the flat cover 28 of the gas spring and the intake joint 9 connected thereto form a gas spring chamber 15. The gas spring chamber 15 is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. At a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19, symmetrically arranged and equally long counter-explosion tubes 11 are provided, and the other ends of the counter-explosion tubes 11 are closed with flat covers 12. The counter-explosion tube 11 communicated with the rear explosion chamber 5 and needs to be connected to the side of the rear explosion chamber body 19 located inside the "pin" character passes through the exact middle of the connection line of the two tubes of the middle explosion chamber body 18 and the front explosion chamber body 13 forming the "pin" character. The opposite counter-explosion tube 11 is symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion tubes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is provided at a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19 to connect the ignition electrode 6.

[0073] Appendix Figure 8 In it, the piston 14 is composed of a piston top 24, a large piston skirt 25, a small piston skirt 26, and a piston end face 27. Four ring grooves 23 are sequentially arranged from top to bottom on the wall surface of the large piston skirt 25, and wear-resistant copper rings 21, O-shaped rubber seal rings 22, O-shaped rubber seal rings 22, and wear-resistant copper rings 21 are sequentially arranged from top to bottom. The piston end face 27 is an annular plane. Under the pressure drive of the gas spring chamber 15, the piston end face 27 contacts the peripheral plane of the outlet of the flared structure 16, so as to achieve a sealing effect. The piston 14 is a cavity structure, and the piston cavity 20 is communicated with the flared structure 16 in a sealed state and is isolated from the premixed combustible gas.

[0074] Embodiment 2

[0075] As Figure 9-14 shown, it is a schematic structural diagram of the dust cleaning device adopting the three-pulse explosion method in the present invention, and each explosion chamber 100 (since it is a three-unit type, there are three explosion chambers 100, which are respectively named the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5) is equipped with 4 positive counter-explosion tubes 11 (that is, the axis of the counter-explosion tube 11 and the axis of the explosion chamber 100 are 90°, and the two are in a perpendicular state, so it is a positive counter-explosion tube 11).

[0076] Figure 9-11Among them, the gas ring pipe 1 and the combustion-supporting gas ring pipe 2 are both hollow annular pipe structures. The gas ring pipe 1 is filled with high-pressure or medium-pressure gas, and the combustion-supporting gas ring pipe 2 is filled with high-pressure or medium-pressure oxygen or compressed air. The gas ring pipe 1 provides high-pressure or medium-pressure gas to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. Similarly, the combustion-supporting gas ring pipe 2 provides high-pressure or medium-pressure oxygen or compressed air to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. The central center lines of the gas ring pipe 1 and the combustion-supporting gas ring pipe 2 and the center of the connecting plate 8 coincide. The connecting plate 8 is arranged in the front, with the gas ring pipe 1 in the middle and the combustion-supporting gas ring pipe 2 in the rear. An air inlet joint 9 is arranged on the gas ring pipe 1 and is connected to the gas source pipeline; an air inlet joint 9 is arranged on the combustion-supporting gas ring pipe 2 and is connected to the oxygen or air source pipeline.

[0077] As can be seen from the appendix Figure 9-11 In the figure, the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 are in a "pin" shape. The front explosion chamber 3 is on the right side of the "pin", the middle explosion chamber 4 is on the top of the "pin", and the rear explosion chamber 5 is on the left side of the "pin". The orientation names "front", "middle", and "rear" here actually refer to the distance from the center of the counter-explosion pipe 11 connected to each explosion chamber to the connecting plate 8. The closer one is "front", the second is "middle", and the farther one is "rear".

[0078] Appendix Figure 12 In the figure, the front explosion chamber 3 is a closed space composed of 4 counter-explosion pipes 11 arranged in a "cross" shape, a piston 14, a front explosion chamber body 13, and an O-shaped rubber seal ring 22, etc. The included angle between the center line of each counter-explosion pipe 11 and the center line of the front explosion chamber body 13 is α = 90°. The front end of the front explosion chamber body 13 is a flared structure 16. The rear end of the front explosion chamber body 13 is a piston top 24 of the piston 14, a gas spring flat cover 28, and an air inlet joint 9 connected to them to form a gas spring chamber 15. The gas spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. The counter-explosion pipes 11 of equal length are symmetrically arranged at a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13, and the other ends of the counter-explosion pipes 11 are closed with a flat cover 12. The counter-explosion pipe 11 of the front explosion chamber 3 relative to the one entering the inner side of the "pin" passes through the exact middle of the connection line of the two pipes of the upper middle explosion chamber body 18 and the left rear explosion chamber body 19 that form the "pin". The opposite counter-explosion pipe 11 is symmetrically arranged in the opposite direction, and at the same time, the distal ends of the counter-explosion pipes 11 arranged in the opposite direction are closed with a flat cover 12. Two counter-explosion pipes 11 are symmetrically arranged in a "cross" shape on the perpendicular line of the two lines of these two counter-explosion pipes 11, and their distal ends are closed with a flat cover 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13 and is connected to the ignition electrode 6.

[0079] Appendix Figure 13In the middle explosion chamber 4, it is a closed space composed of four counter-explosion pipes 11 arranged in a "cross" shape, a piston 14, a middle explosion chamber body 18, an O-ring rubber seal 22, etc. The included angle between the center line of each counter-explosion pipe 11 and the center line of the middle explosion chamber body 18 is α = 90°. The front end of the middle explosion chamber body 18 is a flared structure 16. The rear end of the middle explosion chamber body 18 is that the piston top 24 of the piston 14, the air spring flat cover 28, and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. The counter-explosion pipes 11 of equal length are symmetrically arranged at a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18, and the other ends of the counter-explosion pipes 11 are closed with flat covers 12. The middle explosion chamber 4 passes through the middle of the connection line of the two pipes of the left rear explosion chamber body 19 and the right front explosion chamber body 13 that form the "pin" character relative to the counter-explosion pipe 11 entering the inner side of the "pin" character. The opposite counter-explosion pipes 11 are symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion pipes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18 and is connected to the ignition electrode 6.

[0080] Attachment Figure 14 In the rear explosion chamber 5, it is a closed space composed of four counter-explosion pipes 11 arranged in a "cross" shape, a piston 14, a rear explosion chamber body 19, an O-ring rubber seal 22, etc. The included angle between the center line of each counter-explosion pipe 11 and the center line of the rear explosion chamber body 19 is α = 90°. The front end of the rear explosion chamber body 19 is a flared structure 16. The rear end of the rear explosion chamber body 19 is that the piston top 24 of the piston 14, the air spring flat cover 28, and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber 15 is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. The counter-explosion pipes 11 of equal length are symmetrically arranged at a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19, and the other ends of the counter-explosion pipes 11 are closed with flat covers 12. The rear explosion chamber 5 passes through the middle of the connection line of the two pipes of the upper middle explosion chamber body 18 and the right front explosion chamber body 13 that form the "pin" character relative to the counter-explosion pipe 11 entering the inner side of the "pin" character. The opposite counter-explosion pipes 11 are symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion pipes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19 and is connected to the ignition electrode 6.

[0081] Figure 8In it, the piston 14 consists of a piston crown 24, a large piston skirt 25, a small piston skirt 26, and a piston end face 27. Four ring grooves 23 are arranged on the wall surface of the large piston skirt 25 from top to bottom, and wear-resistant copper rings 21, O-ring rubber seals 22, O-ring rubber seals 22, and wear-resistant copper rings 21 are arranged from top to bottom in sequence. The piston end face 27 is an annular plane. Under the pressure drive of the gas spring chamber 15, the piston end face 27 contacts the peripheral plane of the outlet of the flared structure 16, thus achieving a sealing effect. The piston 14 is a cavity structure, and the piston cavity 20 is connected to the flared structure 16 in a sealed state and isolated from the premixed combustible gas.

[0082] Embodiment 3

[0083] As Figure 15-21 shown, it is a schematic structural diagram of the dust cleaning device adopting the three-way pulse explosion method in the present invention. And on each of the explosion chambers 100 (since it is a three-way type, there are three explosion chambers 100, named the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 respectively), two inclined counter-explosion pipes 11 are arranged (that is, the axis of the counter-explosion pipe 11 is not perpendicular to the axis of the explosion chamber 100, and the preferred included angle is between 45° and 90°, so it is an inclined counter-explosion pipe 11).

[0084] Attached Figure 15-17 In it, both the gas ring pipe 1 and the combustion-supporting gas ring pipe 2 are hollow annular pipe structures. The gas ring pipe 1 and the combustion-supporting gas ring pipe 2 are both hollow annular pipe structures. The gas ring pipe 1 is filled with high-pressure or medium-pressure gas, and the combustion-supporting gas ring pipe 2 is filled with high-pressure or medium-pressure oxygen or compressed air. The gas ring pipe 1 supplies high-pressure or medium-pressure gas to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. Similarly, the combustion-supporting gas ring pipe 2 supplies high-pressure or medium-pressure oxygen or compressed air to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. The central ring lines of the gas ring pipe 1 and the combustion-supporting gas ring pipe 2 and the center of the connecting plate 8 coincide. The connecting plate 8 is arranged in the front, the gas ring pipe 1 is in the middle, and the combustion-supporting gas ring pipe 2 is in the rear. An air inlet joint 9 is arranged on the gas ring pipe 1 and connected to the gas source pipeline; an air inlet joint 9 is arranged on the combustion-supporting gas ring pipe 2 and connected to the oxygen or air source pipeline.

[0085] From Attached Figure 16 it can be seen that the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 are in a "pin" shape. The front explosion chamber 3 is on the right side of the "pin", the middle explosion chamber 4 is on the top of the "pin", and the rear explosion chamber 5 is on the left side of the "pin". The orientation names "front", "middle", and "rear" here actually also refer to the distance from the center of the counter-explosion pipe 11 connected to each explosion chamber to the connecting plate 8. The near one is "front", the second is "middle", and the far one is "rear".

[0086] Attached Figure 19In it, the front explosion chamber 3 is a closed space composed of two symmetrically arranged counter-explosion pipes 11, a piston 14, a front explosion chamber body 13, an O-shaped rubber sealing ring 22, etc. The included angle between the center line of each counter-explosion pipe 11 and the center line of the front explosion chamber body 13 is α = 60°. The front end of the front explosion chamber body 13 is a flared structure 16. The rear end of the front explosion chamber body 13 is that the piston top 24 of the piston 14, the air spring flat cover 28, and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. At a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13, symmetrically arranged and equally long counter-explosion pipes 11 are provided, and the other ends of the counter-explosion pipes 11 are closed with flat covers 12. The front explosion chamber 3 passes through the middle of the connection line of the two pipes of the upper middle explosion chamber body 18 and the left rear explosion chamber body 19 that form the "pin" character relative to the counter-explosion pipe 11 entering the inner side of the "pin" character. The opposite counter-explosion pipe 11 is symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion pipes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is provided at a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13 and is connected to the ignition electrode 6.

[0087] Attached Figure 20 In it, the middle explosion chamber 4 is a closed space composed of two symmetrically arranged counter-explosion pipes 11, a piston 14, a middle explosion chamber body 18, an O-shaped rubber sealing ring 22, etc. The included angle between the center line of each counter-explosion pipe 11 and the center line of the middle explosion chamber body 18 is α = 60°. The front end of the middle explosion chamber body 18 is a flared structure 16. The rear end of the middle explosion chamber body 18 is that the piston top 24 of the piston 14, the air spring flat cover 28, and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. At a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18, symmetrically arranged and equally long counter-explosion pipes 11 are provided, and the other ends of the counter-explosion pipes 11 are closed with flat covers 12. The middle explosion chamber 4 passes through the middle of the connection line of the two pipes of the left rear explosion chamber body 19 and the right front explosion chamber body 13 that form the "pin" character relative to the counter-explosion pipe 11 entering the inner side of the "pin" character. The opposite counter-explosion pipe 11 is symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion pipes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is provided at a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18 and is connected to the ignition electrode 6.

[0088] Attached Figure 21In it, the rear explosion chamber 5 is a closed space composed of two symmetrically arranged counter-explosion tubes 11, a piston 14, a rear explosion chamber body 19, an O-ring rubber seal 22, etc. The included angle between the center line of each counter-explosion tube 11 and the center line of the rear explosion chamber body 19 is α = 60°. The front end of the rear explosion chamber body 19 is a flared structure 16. The rear end of the rear explosion chamber body 19 is that the piston top 24 of the piston 14, the flat cover 28 of the gas spring, and the intake joint 9 connected thereto form a gas spring chamber 15. The gas spring chamber 15 is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. At a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19, counter-explosion tubes 11 of equal length are symmetrically arranged. The other end of the counter-explosion tube 11 is closed with a flat cover 12. The rear explosion chamber 5 is located relative to the counter-explosion tube 11 entering the inner side of the "pin" character, and passes through the exact middle of the connection line of the two tubes of the upper middle explosion chamber body 18 and the right front explosion chamber body 13 forming the "pin" character. The opposite counter-explosion tube 11 is symmetrically arranged in the reverse direction, and at the same time, the distal end of the counter-explosion tube 11 arranged in the reverse direction is closed with a flat cover 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19 to connect the ignition electrode 6.

[0089] Attachment Figure 8 In it, the piston 14 is composed of a piston top 24, a large piston skirt 25, a small piston skirt 26, and a piston end face 27. Four ring grooves 23 are sequentially arranged from top to bottom on the wall surface of the large piston skirt 25, and wear-resistant copper rings 21, O-ring rubber seals 22, O-ring rubber seals 22, and wear-resistant copper rings 21 are sequentially arranged from top to bottom. The piston end face 27 is an annular plane. Under the pressure drive of the gas spring chamber 15, the piston end face 27 contacts the peripheral plane of the outlet of the flared structure 16, so as to achieve a sealing effect. The piston 14 is a cavity structure. The piston cavity 20 is communicated with the flared structure 16 in a sealed state and is isolated from the premixed combustible gas.

[0090] Embodiment 4

[0091] As Figure 15-21 As shown, it is a schematic structural diagram of the dust cleaning device adopting the three-pulse explosion method in the present invention. Each explosion chamber 100 (since it is a three-unit type, there are three explosion chambers 100, which are respectively named the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5) is equipped with 4 inclined counter-explosion tubes 11 (that is, the axis of the counter-explosion tube 11 is not perpendicular to the axis of the explosion chamber 100, and the preferred included angle is between 45° and 90°, then it is an inclined counter-explosion tube 11).

[0092] Figure 22-24In it, the gas ring pipe 1 and the combustion-supporting gas ring pipe 2 are both hollow annular pipe structures. The gas ring pipe 1 and the combustion-supporting gas ring pipe 2 are both hollow annular pipe structures. The gas ring pipe 1 is filled with high-pressure or medium-pressure gas, and the combustion-supporting gas ring pipe 2 is filled with high-pressure or medium-pressure oxygen or compressed air. The gas ring pipe 1 provides high-pressure or medium-pressure gas to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. Similarly, the combustion-supporting gas ring pipe 2 provides high-pressure or medium-pressure oxygen or compressed air to the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 through the connecting pipe 10 under the control of the solenoid valve 7. The central center lines of the gas ring pipe 1 and the combustion-supporting gas ring pipe 2 and the center of the connecting plate 8 coincide. The connecting plate 8 is arranged in the front, with the gas ring pipe 1 in the middle and the combustion-supporting gas ring pipe 2 in the rear. An air inlet joint 9 is arranged on the gas ring pipe 1 and is connected to the gas source pipeline; an air inlet joint 9 is arranged on the combustion-supporting gas ring pipe 2 and is connected to the oxygen or air source pipeline.

[0093] As can be seen from the attached Figure 23 In it, the front explosion chamber 3, the middle explosion chamber 4, and the rear explosion chamber 5 are in a "pin" shape. The front explosion chamber 3 is on the right side of the "pin", the middle explosion chamber 4 is on the top of the "pin", and the rear explosion chamber 5 is on the left side of the "pin". The orientation names "front", "middle", and "rear" here actually refer to the distance from the center of the counter-explosion pipe 11 connected to each explosion chamber to the connecting plate 8. The one closer is "front", the second is "middle", and the farther is "rear".

[0094] Attached Figure 26 In it, the front explosion chamber 3 is a closed space composed of 4 counter-explosion pipes 11 arranged in a "cross" shape, a piston 14, a front explosion chamber body 13, an O-shaped rubber seal ring 22, etc. The included angle between the center line of each counter-explosion pipe 11 and the center line of the front explosion chamber body 13 is α = 60°. The front end of the front explosion chamber body 13 is a flared structure 16. The rear end of the front explosion chamber body 13 is a piston top 24 of the piston 14, a gas spring flat cover 28, and an air inlet joint 9 connected thereto to form a gas spring chamber 15. The gas spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. The counter-explosion pipes 11 of equal length are symmetrically arranged at a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13, and the other ends of the counter-explosion pipes 11 are closed with a flat cover 12. The counter-explosion pipe 11 of the front explosion chamber 3 relative to entering the inner side of the "pin" passes through the exact middle of the two-pipe connection line of the upper middle explosion chamber body 18 and the left rear explosion chamber body 19 forming the "pin". The opposite counter-explosion pipe 11 is symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion pipes 11 arranged in the reverse direction are closed with a flat cover 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the front explosion chamber body 13 and is connected to the ignition electrode 6.

[0095] Attached Figure 27In it, the middle explosion chamber 4 is a closed space composed of four counter-explosion tubes 11 arranged in a "cross" shape, a piston 14, a middle explosion chamber body 18, an O-shaped rubber sealing ring 22, etc. The included angle between the center line of each counter-explosion tube 11 and the center line of the middle explosion chamber body 18 is α = 60°. The front end of the middle explosion chamber body 18 is a flared structure 16. The rear end of the middle explosion chamber body 18 is that the piston top 24 of the piston 14, the air spring flat cover 28 and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. The counter-explosion tubes 11 of equal length are symmetrically arranged at a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18, and the other ends of the counter-explosion tubes 11 are closed with flat covers 12. The middle explosion chamber 4 passes through the middle of the connection line of the two tubes of the left rear explosion chamber body 19 and the right front explosion chamber body 13 that form the "pin" character relative to the counter-explosion tube 11 entering the inner side of the "pin" character. The opposite counter-explosion tubes 11 are symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion tubes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the middle explosion chamber body 18 and is connected to the ignition electrode 6.

[0096] Appendix Figure 28 In it, the rear explosion chamber 5 is a closed space composed of four counter-explosion tubes 11 arranged in a "cross" shape, a piston 14, a rear explosion chamber body 19, an O-shaped rubber sealing ring 22, etc. The included angle between the center line of each counter-explosion tube 11 and the center line of the rear explosion chamber body 19 is α = 60°. The front end of the rear explosion chamber body 19 is a flared structure 16. The rear end of the rear explosion chamber body 19 is that the piston top 24 of the piston 14, the air spring flat cover 28 and the intake joint 9 connected thereto form an air spring chamber 15. The air spring chamber 15 is filled with N2 or Ar gas to be used as the sealing pressure between the piston 14 and the outlet end face of the flared structure 16. The counter-explosion tubes 11 of equal length are symmetrically arranged at a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19, and the other ends of the counter-explosion tubes 11 are closed with flat covers 12. The rear explosion chamber 5 passes through the middle of the connection line of the two tubes of the upper middle explosion chamber body 18 and the right front explosion chamber body 13 that form the "pin" character relative to the counter-explosion tube 11 entering the inner side of the "pin" character. The opposite counter-explosion tubes 11 are symmetrically arranged in the reverse direction, and at the same time, the distal ends of the counter-explosion tubes 11 arranged in the reverse direction are closed with flat covers 12. An ignition electrode joint 17 is arranged at a certain distance from the outlet end face of the flared structure 16 of the rear explosion chamber body 19 and is connected to the ignition electrode 6.

[0097] Appendix Figure 8In the figure, piston 14 comprises a piston crown 24, a large piston skirt 25, a small piston skirt 26, and a piston end face 27. Four annular grooves 23 are arranged on the wall of the large piston skirt 25, from top to bottom. Arranged from top to bottom are a wear-resistant copper ring 21, an O-ring 22, an O-ring 22, and finally a wear-resistant copper ring 21. The piston end face 27 is an annular plane. Driven by pressure from the gas spring chamber 15, the piston end face 27 contacts the outer surface of the outlet of the bell-mouth structure 16, thereby achieving a sealing effect. The piston 14 is a hollow structure. The piston cavity 20 is sealed and communicates with the bell-mouth structure 16, isolating it from the premixed combustible gas.

[0098] Example 5

[0099] like Figure 29 and Figure 30 As shown, based on Example 1, a plurality of explosion chambers 100 are provided, and the explosion chambers 100 are distributed as a central explosion chamber 29 located in the center and peripheral explosion chambers 30 arranged around the central explosion chamber 29 (herein, the central explosion chamber 29 is preferably one, and the peripheral explosion chambers 30 are preferably arranged at equal intervals along the circumferential direction). At the same time, because the peripheral explosion chambers 30 are close to the inner wall of the structure to be cleaned, the extension direction of the peripheral explosion chambers 30 is further made to spread obliquely toward the periphery, thereby effectively achieving effective cleaning of dust accumulated on the inner wall to be cleaned.

[0100] Based on the above-mentioned setting method, the present invention can pre-set the detonation parameters and adjust the gas introduced into each pair of explosion tubes 11, combined with the control of the detonation time, so that the internal blasting effect is different, thereby realizing the pulse explosion cleaning operation under different environments and requirements in a targeted manner. During operation, the gas ring pipe 1 provides the metering of the explosion gas, and the gas is provided by the connecting pipe 10 and the solenoid valve 7 connected thereto. The combustion-supporting gas ring pipe 2 provides the metering of oxygen or air, and the oxygen (air) is provided by the connecting pipe 10 and the solenoid valve 7 connected thereto. The explosion gas and oxygen (air) are configured in a chemical equivalence ratio. When the chemical equivalence ratio is 1, the highest explosion pulse pressure peak can be obtained. It should be noted that the gas ring pipe 1 and the combustion-supporting gas ring pipe 2, as well as the explosion tube 11 and the front explosion chamber body 13, the middle explosion chamber body 18, and the rear explosion chamber body 19 can all be selected as steel pipe structures, so as to have better pressure-bearing performance, so that the explosion pulse cleaning device has better safety performance. The lengths of the bell-mouth structures 16 provided at the outlets of the front explosion chamber 3 , the middle explosion chamber 4 , and the rear explosion chamber 5 may be the same or different.

[0101] 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 multi-pulse explosion cleaning device, characterized in that: Comprising an installation part, a plurality of explosion chambers (100) installed on the installation part, a set of counter-explosion pipes (11) respectively connected to each explosion chamber (100), a combustion gas supply mechanism (200) connected to a part of each set of counter-explosion pipes (11), and a combustion-supporting gas supply mechanism (300) connected to another part of each set of counter-explosion pipes (11); wherein, In the explosion chamber (100), a venting port is sealed by a piston (14), and one end of the explosion chamber (100) is formed as a release end; Each explosion chamber (100) is respectively connected with an ignition electrode (6), and the plurality of ignition electrodes (6) are used for ignition simultaneously or at different times, so that the plurality of explosion chambers (100) are detonated simultaneously or at different times and the venting port is opened; Each set of counter-explosion pipes (11) has at least one pair, and the axes of each pair of counter-explosion pipes (11) are on the same straight line. One of a pair of counter-explosion pipes (11) is connected to the combustion gas supply mechanism (200), and the other is connected to the combustion-supporting gas supply mechanism (300).

2. The multi-pulse explosion cleaning device according to claim 1 is characterized in that: The ratio of the length to the diameter of the counter-explosion pipe (11) in the axial direction is not less than 15.

3. A multi-pulse explosion cleaning device according to claim 1 or 2, characterized in that: The axes of the plurality of explosion chambers (100) are arranged in parallel, and; An included angle α is formed between the axial direction of the counter-explosion pipe (11) and the axial direction of the explosion chamber (100), and 90° ≥ α ≥ 45°.

4. A multi-pulse explosion cleaning device according to claim 1 or 2, characterized in that: The combustion gas supply mechanism (200) includes a gas ring pipe (1) formed as a ring; The combustion-supporting gas supply mechanism (300) includes an auxiliary gas ring pipe (2) formed as a ring; And the gas ring pipe (1) and the auxiliary gas ring pipe (2) are respectively connected to the counter-explosion pipe (11) through solenoid valves (7).

5. A multi-pulse explosion cleaning device according to claim 1 or 2, characterized in that: There are three explosion chambers (100), and the cross-sections of the plurality of explosion chambers (100) are arranged in a "pin" shape.

6. A multi-pulse explosion cleaning device according to claim 1 or 2, characterized in that: The part of the explosion chamber (100) close to the release end is formed as a flared structure (16), and the inner diameter of the flared structure (16) gradually increases from the end far from the release end to the end close to the release end; The flared structure (16) is located outside one end of the piston (14).

7. A multi-pulse explosion cleaning device according to claim 1 or 2, characterized in that: The explosion chamber (100) includes a central explosion chamber (29) at the center, and peripheral explosion chambers (30) arranged circumferentially around the central explosion chamber (29).

8. The multi-pulse explosion cleaning device according to claim 7 is characterized in that: The number of counter-explosion pipes (11) connected to the central explosion chamber (29) is greater than the number of counter-explosion pipes (11) connected to the peripheral explosion chambers (30).

9. The multi-pulse explosion cleaning device according to claim 8, characterized in that: An included angle is formed between the axial direction of the peripheral explosion chamber (30) and the axial direction of the central explosion chamber (29), and the peripheral explosion chamber (30) extends obliquely outward from the end far from the release end to the release end.

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