CN115532494A

CN115532494A - Composite spray gun for denitration

Info

Publication number: CN115532494A
Application number: CN202211487851.4A
Authority: CN
Inventors: 白云
Original assignee: Hebei Hengcheng Environmental Protection Technology Co ltd
Current assignee: Hebei Hengcheng Environmental Protection Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2022-12-30
Anticipated expiration: 2042-11-25
Also published as: CN115532494B

Abstract

The invention relates to the technical field of denitration spray gun equipment, and provides a composite spray gun for denitration, which comprises a gun body, a spray nozzle and a quick-connection mechanism, wherein the quick-connection mechanism is connected between the gun body and the spray nozzle and comprises a lock catch and a lock piece, the lock catch is rotatably arranged on the gun body, the lock catch is provided with a clamping groove, one side of the lock catch, which is far away from the spray nozzle, is provided with a locking column, and the locking column is positioned on the side edge of the clamping groove; the locking piece is arranged on the nozzle, a locking head is arranged on one side, far away from the nozzle, of the locking piece, a locking platform is arranged at one end of the locking head, a locking groove is formed in the side wall, close to one side of the locking piece, of the locking platform, when the locking piece penetrates through the clamping groove, the inclined surface on the locking head drives the locking buckle to rotate, and after the locking piece is close to and penetrates through the clamping groove, the locking column is abutted to or separated from the locking groove; a limiting table is arranged on one side, far away from the locking table, of the lock head; through above-mentioned technical scheme, the inconvenient and big problem of work load of operation when having solved the nozzle change among the correlation technique.

Description

Composite spray gun for denitration

Technical Field

The invention relates to the technical field of denitration spray gun equipment, in particular to a composite spray gun for denitration.

Background

With the development of society, the environment is more seriously damaged, in order to relieve the damage of the environment and increase the protection force on the environment, people put forward higher and higher discharge standards on waste water, waste gas, waste materials and the like discharged after the production of factories is finished, and the produced discharge can be discharged into the environment after the discharge is purified to reach the standard; denitration treatment is commonly used in the waste gas purification process, liquid to be reacted is sprayed into a denitration tower through a spray gun during denitration, so that the liquid is atomized, and the atomized liquid and gas to be reacted can fully react conveniently; denitration reaction tower's reaction temperature is generally higher, and the spray gun is in the denitration tower for a long time, and the whole life of spray gun is on the low side, and the mouth of spray gun easily blocks up and damages, needs frequent dismouting nozzle, and current spray gun is mostly the integral type, and the nozzle is integrative with the rifle body promptly, need change the spray gun together when changing the nozzle, and it is big to change the degree of difficulty, and work load is big, and the maintenance cost is high, consequently need improve the promotion to current technique.

Disclosure of Invention

The invention provides a composite spray gun for denitration, which solves the problems of inconvenient operation and large workload when a nozzle is replaced in the related technology.

The technical scheme of the invention is as follows:

the composite spray gun for denitration comprises a gun body, a spray nozzle and a quick connection mechanism, wherein the quick connection mechanism is connected and arranged between the gun body and the spray nozzle and comprises a lock catch and a lock piece, the lock catch is rotatably arranged on the gun body, the lock catch is provided with a clamping groove, one side of the lock catch, which is far away from the spray nozzle, is provided with a locking column, and the locking column is positioned on the side edge of the clamping groove; the locking piece is arranged on the nozzle, a locking head is arranged on one side of the locking piece, which is far away from the nozzle, a locking platform is arranged at one end of the locking head, a locking groove is formed in the side wall, which is close to one side of the locking piece, of the locking platform, when the locking piece penetrates through the clamping groove, the inclined surface on the locking head drives the locking buckle to rotate, and after the locking piece is close to and penetrates through the clamping groove, the locking column is abutted against or separated from the locking groove; and one side of the lock head, which is far away from the locking platform, is provided with a limiting platform, and when the nozzle is connected with the gun body, the lock catch is positioned between the locking platform and the limiting platform.

As a further technical scheme, the mechanism that connects soon still includes locking spring and guide bar, be close to on the rifle body the guiding hole has been seted up to one side of nozzle, the guide bar removes to set up in the guiding hole, keep away from on the guide bar one side of the rifle body is provided with the arc contact, the locking spring housing is established on the guide bar, locking spring's both ends respectively with the arc contact with the rifle body links firmly, wherein be close to on the rifle body one side of nozzle is provided with the sliding table, be equipped with the sliding tray on the hasp, the sliding table removes to set up in the sliding tray.

As a further technical scheme, the quick-connection mechanism further comprises an unlocking assembly, the unlocking assembly comprises an unlocking ring and a connecting rod, the unlocking ring is rotatably arranged on the nozzle, two ends of the connecting rod are respectively hinged with the unlocking ring and the lock head, the locking piece is rotatably connected with the nozzle, and a plurality of boosting heads are circumferentially distributed on the outer wall of the unlocking ring.

As a further technical scheme, the quick-connection mechanism further comprises a reset assembly, the reset assembly comprises a reset spring and a telescopic unit, a stand column is arranged on one side, close to the unlocking ring, of the nozzle, two ends of the telescopic unit are hinged to the stand column and the unlocking ring respectively, the reset spring is sleeved on the telescopic unit, and two ends of the reset spring are fixed to the telescopic unit.

As a further technical scheme, the telescopic unit comprises a sliding sleeve and a sliding rod, one of the sliding sleeve and the sliding rod is hinged to the upright column, the other one of the sliding sleeve and the sliding rod is hinged to the unlocking ring, the sliding sleeve is movably connected with the sliding rod, and two ends of the reset spring are fixedly connected with the sliding sleeve and the sliding rod respectively.

As a further technical scheme, the gun body comprises a liquid spraying cavity and a cooling cavity, the cooling cavity is sleeved outside the liquid spraying cavity, a groove is formed in one side, close to the nozzle, of the liquid spraying cavity, a boss is arranged on one side, close to the gun body, of the nozzle, and the boss is clamped into the groove when the gun body is close to the nozzle; and one side of the cooling cavity, which is close to and far away from the nozzle, is connected with a first through pipe and a second through pipe respectively.

As a further technical scheme, a wall cleaning mechanism is arranged on one side, far away from the nozzle, of the liquid spraying cavity and comprises a wall cleaning motor and a wall cleaning knife, the wall cleaning motor is arranged on the outer wall of the liquid spraying cavity, the telescopic output end of the wall cleaning motor is located inside the liquid spraying cavity, the wall cleaning knife is rotatably arranged on the telescopic output end of the wall cleaning motor, and the wall cleaning knife is abutted to the inner wall of the liquid spraying cavity.

As a further technical scheme, still include screening mechanism in advance, screening mechanism sets up in advance on the feed liquor pipe of rifle body, screening mechanism includes screening main part in advance, sieve tray and screening motor in advance, the screening motor sets up in advance on the first support frame of feed liquor pipe one side, the screening main part sets up in advance on the second support frame of feed liquor pipe one side, have the cavity of screening in advance in the screening main part in advance, the sieve tray rotates to set up in advance in the cavity of screening and with the output of screening motor links firmly in advance, a plurality of sieve mesh in advance has been seted up in the screening main part in advance, the feed liquor pipe with one of them sieve mesh is fixed to be communicated in advance, be provided with a plurality of screen cloth on the sieve tray in advance, when the sieve tray rotates in advance the screen cloth with sieve mesh coincidence or separation in advance.

As a further technical scheme, the pre-screening mechanism further comprises a washing component, the washing component is arranged on one side of the pre-screening main body, the washing component comprises a washing motor, a washing pipe, a washing output pipe, a rotating shaft, fan blades, a vibrating piece, a buffer spring and a limiting rod, the washing motor is arranged on a third support frame on one side of the pre-screening main body, the washing pipe and the washing output pipe are respectively arranged on two opposite sides of the pre-screening main body and communicated with the pre-screening holes, the washing pipe is communicated with the output end of the washing motor, the rotating shaft is rotatably arranged on the washing pipe, the fan blades are circumferentially distributed for a plurality of the fan blades and arranged on the rotating shaft, a cross rod is arranged at the outlet of the washing pipe, the vibrating piece is movably arranged on the cross rod, the limiting hole is formed in the cross rod, the limiting rod is arranged on the vibrating piece and movably connected with the limiting hole, the buffer spring is sleeved on the limiting rod, and two ends of the buffer spring are respectively fixedly connected with the vibrating piece and the cross rod.

The working principle and the beneficial effects of the invention are as follows:

in the invention, in order to facilitate the disassembly and replacement of the liquid nozzle in the denitration tower, the inventor provides the composite spray gun for denitration, so that the nozzle is convenient to maintain, the integral replacement frequency of the spray gun is reduced, and the maintenance cost is reduced. The quick-connection gun specifically comprises a gun body, a nozzle and a quick-connection mechanism, wherein the quick-connection mechanism comprises a lock catch and a lock piece; when the locking device is installed, the main body of the nozzle is clamped, the locking piece on the nozzle points to the lock catch, and the lock head corresponds to the clamping groove; then moving the nozzle to enable the locking piece to be close to the lock catch until the lock head is in extrusion contact with the edge of the clamping groove; the nozzle is continuously moved, the lock head can extrude the clamping groove, so that the clamping groove slides on the inclined plane on one side of the upper limiting table of the lock head until the locking column moves from one side, far away from the locking table, of the lock head to one side, far away from the lock head, of the locking table; then the nozzle is moved continuously, the lock catch slides continuously on the inclined plane on one side of the limiting table on the lock head, the locking column moves from one side, far away from the lock piece, of the locking table to one side, close to the lock piece, of the locking table, and the locking column faces the lock groove; continuously moving the nozzle until the lock catch is in extrusion contact with the limiting table, and then stopping moving the nozzle; then draw the nozzle to the direction of keeping away from the rifle body and draw and drag the nozzle, make the locking post card go into the locked groove, accomplish the joint of nozzle and rifle body, look along the axial lead direction of the rifle body this moment, the hasp is located between locking platform and spacing, when the spray gun was used, under the impact of liquid, the nozzle received a thrust of keeping away from the rifle body, can effectually prevent that nozzle and rifle body from taking place to separate. The spray gun has the advantages that the independent quick replacement and installation of the spray nozzle can be realized by means of the quick connection mechanism, the phenomenon that the gun body needs to be replaced when the spray nozzle of the integrated spray gun is replaced is avoided, the maintenance workload of workers is reduced, and the maintenance cost is reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram at a in fig. 1.

Fig. 3 is a schematic structural view of the joint of the quick-connect structure and the nozzle of the present invention.

Fig. 4 is a schematic structural diagram at B in fig. 3.

Fig. 5 is a schematic structural view of the resetting assembly of the invention.

Figure 6 is a schematic view of the lock of the present invention.

Fig. 7 is a schematic structural view of the wall cleaning motor and the wall cleaning knife of the invention.

FIG. 8 is a schematic view of the pre-screening mechanism of the present invention.

Fig. 9 is a schematic view of the structure at C in fig. 8.

Fig. 10 is a schematic view of the structure at the flushing assembly.

FIG. 11 is a schematic view of the structure of the nozzle and boss of the present invention.

Fig. 12 is a schematic view of the gun body according to the present invention.

Fig. 13 is a schematic view of the overlapping portion of the locking element and the locking buckle according to the present invention.

In the figure: 1. a gun body, 2, a nozzle, 3, a lock catch, 4, a locking piece, 5, a clamping groove, 6, a locking column, 7, a locking head, 8, a locking platform, 9, a locking groove, 10, a limiting platform, 11, a locking spring, 12, a guide rod, 13, an arc contact, 14, a sliding platform, 15, a sliding groove, 16, an unlocking ring, 17, a connecting rod, 18, a reset spring, 19, an upright post, 20, a sliding sleeve, 21, a sliding rod, 22 and a liquid spraying chamber, 23, a cooling chamber, 24, a groove, 25, a boss, 26, a wall cleaning motor, 27, a wall cleaning knife, 28, a liquid inlet pipe, 29, a pre-screening main body, 30, a pre-screening disc, 31, a pre-screening motor, 32, a pre-screening hole, 33, a screen, 34, a washing motor, 35, a washing pipe, 36, a washing output pipe, 37, a rotating shaft, 38, fan blades, 39, a vibrating piece, 40, a buffer spring, 41, a limiting rod, 42 and a cross rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall relate to the scope of protection of the present invention.

As shown in fig. 1 to 13, the present embodiment proposes a composite lance for denitration.

The composite spray gun for denitration comprises a gun body 1, a nozzle 2 and a quick-connection mechanism, wherein the quick-connection mechanism is connected between the gun body 1 and the nozzle 2 and comprises a lock catch 3 and a lock piece 4, the lock catch 3 is rotatably arranged on the gun body 1, a clamping groove 5 is formed in the lock catch 3, a locking column 6 is arranged on one side, far away from the nozzle 2, of the lock catch 3, and the locking column 6 is located on the side edge of the clamping groove 5; the locking piece 4 is arranged on the nozzle 2, a locking head 7 is arranged on one side, far away from the nozzle 2, of the locking piece 4, a locking platform 8 is arranged at one end of the locking head 7, a locking groove 9 is formed in the side wall, close to one side of the locking piece 4, of the locking platform 8, when the locking piece 4 penetrates through the clamping groove 5, the inclined surface on the locking head 7 drives the locking buckle 3 to rotate, and after the locking piece 4 is close to and penetrates through the clamping groove 5, the locking column 6 is abutted to or separated from the locking groove 9; one side of keeping away from locking platform 8 on tapered end 7 is provided with spacing platform 10, and when nozzle 2 and rifle body 1 were connected, hasp 3 was located between locking platform 8 and spacing platform 10.

In this embodiment, as shown in fig. 1 to 6 and 13, in order to facilitate the detachment and replacement of the liquid nozzle 2 in the denitration tower, the inventor provides a composite spray gun for denitration, which facilitates the maintenance of the nozzle 2, reduces the number of times of the overall replacement of the spray gun, and reduces the maintenance cost. The spray gun comprises a gun body 1, a nozzle 2 and a quick connection mechanism, wherein the quick connection mechanism comprises a lock catch 3 and a lock piece 4; when the nozzle is installed, the main body of the nozzle 2 is clamped, the locking piece 4 on the nozzle 2 points to the lock catch 3, and the lock head 7 corresponds to the clamping groove 5; then the nozzle 2 is moved to enable the locking piece 4 to be close to the lock catch 3 until the tapered end 7 is in extrusion contact with the edge of the clamping groove 5; when the nozzle 2 is continuously moved, the locking head 7 can extrude the clamping groove 5, so that the clamping groove 5 slides on the inclined plane on one side of the limiting table 10 on the locking head 7 until the locking column 6 moves from one side, far away from the locking table 8, of the locking head 7 to one side, far away from the locking head 7, of the locking table 8; then the nozzle 2 is moved continuously, the lock catch 3 slides continuously on the inclined plane on one side of the limiting table 10 on the lock head 7, at the moment, the locking column 6 moves from one side of the locking table 8 far away from the locking piece 4 to one side of the locking table 8 close to the locking piece 4, and at the moment, the locking column 6 is right opposite to the locking groove 9; the nozzle 2 is continuously moved until the lock catch 3 is in extrusion contact with the limiting table 10, and then the nozzle 2 is stopped moving; then draw nozzle 2 to the direction of keeping away from rifle body 1 and drag, make locking post 6 card go into the locked groove 9, accomplish the joint of nozzle 2 and rifle body 1, look along the axial lead direction of rifle body 1 this moment, hasp 3 is located between locking platform 8 and spacing, and when the spray gun used, under the impact of liquid, nozzle 2 received a thrust of keeping away from rifle body 1, can effectually prevent that nozzle 2 and rifle body 1 from taking place to separate. The spray nozzle 2 can be independently and quickly replaced and installed by the aid of the quick connection mechanism, the phenomenon that the gun body 1 needs to be replaced together when the spray nozzle 2 is replaced by an integrated spray gun is avoided, maintenance workload of workers is reduced, and maintenance cost is reduced.

Further, the mechanism that connects soon still includes locking spring 11 and guide bar 12, the guiding hole has been seted up to the one side that is close to nozzle 2 on the rifle body 1, guide bar 12 removes and sets up in the guiding hole, the one side of keeping away from the rifle body 1 on guide bar 12 is provided with arc contact 13, locking spring 11 cover is established on guide bar 12, locking spring 11's both ends link firmly with arc contact 13 and rifle body 1 respectively, wherein the one side that is close to nozzle 2 on the rifle body 1 is provided with sliding stand 14, be equipped with sliding tray 15 on the hasp 3, sliding stand 14 removes and sets up in sliding tray 15.

In this embodiment, as shown in fig. 1 to 6 and 13, in order to improve the stability of the clamping connection between the nozzle 2 and the gun body 1, the inventor adds a locking spring 11 and a guide rod 12 to the quick-connection mechanism, wherein a sliding table 14 is arranged on one side of the gun body 1 close to the nozzle 2, and a sliding groove 15 is arranged on the lock catch 3; when the gun is used, in the process of moving the nozzle 2 to enable the nozzle 2 to be close to the gun body 1, before the lock catch 3 is in extrusion contact with the lock head 7, the arc-shaped contact 13 is in extrusion contact with the nozzle 2; the nozzle 2 is moved continuously, and the locking spring 11 is contracted to accumulate elastic force; after the locking column 6 is clamped into the locking groove 9, the nozzle 2 starts to move in the direction away from the gun body 1 under the action of external force, and meanwhile, the locking spring 11 extends to release the elastic force, so that the locking column 6 is clamped in the locking groove 9; after the external force applied on the spray nozzle 2 is removed, the locking column 6 is always positioned in the locking groove 9 under the elastic force of the locking spring 11, so that the phenomenon that the spray nozzle 2 is separated from the gun body 1 when the spray gun is not used is avoided.

Furthermore, the quick-connecting mechanism further comprises an unlocking assembly, the unlocking assembly comprises an unlocking ring 16 and a connecting rod 17, the unlocking ring 16 is rotatably arranged on the nozzle 2, two ends of the connecting rod 17 are respectively hinged with the unlocking ring 16 and the lock head 7, the lock piece 4 is rotatably connected with the nozzle 2, and a plurality of boosting heads are circumferentially distributed on the outer wall of the unlocking ring 16.

In the embodiment, as shown in fig. 1 to 6 and 13, in order to facilitate the disassembly of the nozzle 2, the inventor adds an unlocking assembly to the quick-connection mechanism, where the unlocking assembly specifically includes an unlocking ring 16 and a connecting rod 17, where one end of the connecting rod 17 connected to the lock head 7 is hinged to a circular hole, and one end of the connecting rod 17 connected to the unlocking ring 16 is hinged to an oblong hole; when the nozzle 2 needs to be disassembled, the boosting head is clamped, the unlocking ring 16 is rotated, the unlocking ring 16 can rotate forwards and reversely, the connecting rod 17 can be driven to rotate on the lock head 7 while the rotated unlocking ring 16 moves in the long round hole, and the damage to parts due to the fact that hard force dragging exists among the connecting rod 17, the lock head 7 and the unlocking ring 16 during non-unlocking operation is avoided by means of the long round hole; when the unlocking ring 16 moves to the edge position of the long round hole, the unlocking ring 16 is continuously rotated, the unlocking ring 16 drives the connecting rod 17 to move, the connecting rod 17 drives the locking head 7 and the locking piece 4 to rotate together on the nozzle 2, and when the locking head 7 rotates, the locking column 6 slides in the locking groove 9; with the continuous rotation of the unlocking ring 16, the unlocking ring 16 stops rotating until the locking column 6 is separated from the locking groove 9, and then the nozzle 2 can be detached by pulling the nozzle 2 in the direction away from the gun body 1, so that the detachment of the nozzle 2 is completed.

Furthermore, mechanism still includes reset assembly soon, and reset assembly includes reset spring 18 and flexible unit, and the nozzle 2 is gone up and is close to one side of separating catch 16 and be provided with stand 19, and flexible unit's both ends are articulated with stand 19 and separating catch 16 respectively, and reset spring 18 cover is established on flexible unit, and reset spring 18's both ends are all fixed on flexible unit.

In this embodiment, as shown in fig. 1 to 6 and 13, in order to facilitate reuse of the quick-connect mechanism, the inventor adds a return assembly to the quick-connect mechanism, specifically including a return spring 18 and a telescopic unit; when the unlocking ring 16 is rotated, the unlocking ring 16 drives the telescopic unit to perform telescopic change; at the same time, the return spring 18 contracts or extends adaptively and accumulates elastic force; when the nozzle 2 leaves the gun body 1, the force applied on the unlocking ring 16 is removed, the return spring 18 releases the accumulated elastic force, and the unlocking ring 16 rotates on the nozzle 2 and returns to the initial position under the action of the elastic force provided by the return spring 18 to wait for the next unlocking operation.

Further, the telescopic unit comprises a sliding sleeve 20 and a sliding rod 21, one of the sliding sleeve 20 and the sliding rod 21 is hinged with the upright post 19, the other one is hinged with the unlocking ring 16, the sliding sleeve 20 is movably connected with the sliding rod 21, and two ends of the return spring 18 are fixedly connected with the sliding sleeve 20 and the sliding rod 21 respectively.

In the present embodiment, as shown in fig. 1 to 6 and 13, the inventor refines the telescopic unit, and the specific telescopic unit includes a sliding sleeve and a sliding rod 21, when the return spring 18 is changed in a telescopic manner, the sliding sleeve 20 moves on the sliding rod 21, and the sliding sleeve 20 and the sliding rod 21 prevent the return spring 18 from being deformed in a lateral direction when the return spring is changed in a telescopic manner, thereby ensuring the stability of the telescopic change of the return spring 18.

Further, the gun body 1 comprises a liquid spraying chamber 22 and a cooling chamber 23, the cooling chamber 23 is sleeved outside the liquid spraying chamber 22, a groove 24 is formed in one side, close to the nozzle 2, of the liquid spraying chamber 22, a boss 25 is arranged on one side, close to the gun body 1, of the nozzle 2, and the boss 25 is clamped into the groove 24 when the gun body 1 and the nozzle 2 are close to each other; a first through pipe and a second through pipe are respectively connected to one side of the cooling chamber 23 close to and far away from the nozzle 2.

In the embodiment, as shown in fig. 1 and fig. 11 to 12, in order to reduce the environmental temperature when the spray gun is used and reduce the damage of the high-temperature environment in the denitration tower to the spray gun, the inventor adds a liquid spraying chamber 22 and a cooling chamber 23 on the gun body 1, and the cooling liquid enters and exits the cooling chamber 23 through a first through pipe and a second through pipe; the outer wall of the liquid spraying chamber 22 is wrapped by a layer of low-temperature liquid through the cooling liquid flowing in the cooling chamber 23, and the overall temperature of the gun body 1 during working is reduced through the wrapped layer of low-temperature liquid, so that the damage of a high-temperature environment in the denitration tower to the spray gun is reduced, and the service life of the spray gun is prolonged.

Further, a wall cleaning mechanism is arranged on one side of the liquid spraying chamber 22 far away from the nozzle 2, the wall cleaning mechanism comprises a wall cleaning motor 26 and a wall cleaning knife 27, the wall cleaning motor 26 is arranged on the outer wall of the liquid spraying chamber 22, the telescopic output end of the wall cleaning motor 26 is located inside the liquid spraying chamber 22, the wall cleaning knife 27 is rotatably arranged on the telescopic output end of the wall cleaning motor 26, and the wall cleaning knife 27 is abutted against the inner wall of the liquid spraying chamber 22.

In the embodiment, as shown in fig. 1, 7 and 12, in order to prevent cohesive substances in the liquid sprayed by the spray gun from adhering to the inner wall of the liquid spraying chamber 22, the inventor adds a wall cleaning mechanism in the liquid spraying chamber 22, wherein the wall cleaning mechanism specifically comprises a wall cleaning motor 26 and a wall cleaning knife 27, and the wall cleaning motor 26 is electrically connected with a control system outside the denitration tower; when the inner wall of the liquid spraying chamber 22 needs to be cleaned, under the regulation and control of the control system, the wall cleaning motor 26 is started, the telescopic output end of the wall cleaning motor 26 starts to extend, and the wall cleaning knife 27 is driven to start to slide on the inner wall of the liquid spraying chamber 22, and in the moving process of the wall cleaning knife 27, the wall cleaning knife 27 can also rotate on the telescopic output end of the wall cleaning motor 26 to cut substances on the inner wall of the liquid spraying chamber 22 at an inclined angle, so that the reaction force applied to the wall cleaning knife 27 is reduced, and the wall cleaning effect is improved.

Further, the pre-screening device comprises a pre-screening mechanism, the pre-screening mechanism is arranged on a liquid inlet pipe 28 of the gun body 1 and comprises a pre-screening main body 29, a pre-screening disc 30 and a pre-screening motor 31, the pre-screening motor 31 is arranged on a first support frame on one side of the liquid inlet pipe 28, the pre-screening main body 29 is arranged on a second support frame on one side of the liquid inlet pipe 28, a pre-screening chamber is formed in the pre-screening main body 29, the pre-screening disc 30 is rotatably arranged in the pre-screening chamber and fixedly connected with the output end of the pre-screening motor 31, a plurality of pre-screening holes 32 are formed in the pre-screening main body 29, the liquid inlet pipe 28 is fixedly communicated with one of the pre-screening holes 32, a plurality of screen meshes 33 are arranged on the pre-screening disc 30, and the screen meshes 33 and the pre-screening holes 32 coincide or separate when the pre-screening disc 30 rotates.

In this embodiment, as shown in fig. 1 and fig. 7 to 10, in order to reduce the content of impurities in the liquid sprayed in the gun body 1 and reduce the phenomenon of blockage of the nozzle 2, the inventor adds a screening mechanism to a liquid inlet pipe 28 of the gun body 1, wherein the screening mechanism specifically comprises a pre-screening main body 29, a pre-screening tray 30 and a pre-screening motor 31, and the pre-screening motor 31 is electrically connected with a control system outside the denitration tower; when the device works, liquid to be sprayed passes through the pre-screening main body 29 through the liquid inlet pipe 28, and impurities with larger particles are intercepted under the action of the screen mesh 33; then the screen 33 and the pre-screening tray 30 rotate in the same direction under the action of the pre-screening motor 31, the screen 33 intercepting impurities is rotated to other positions, and when the current screen 33 is rotated away, a complete screen 33 is rotated to the pre-screening hole 32 communicated with the liquid inlet pipe 28, so that the liquid inlet operation of the liquid inlet pipe 28 is kept to be smoothly performed, and the screening effect is ensured.

Further, the pre-screening mechanism further comprises a washing assembly, the washing assembly is arranged on one side of the pre-screening main body 29, the washing assembly comprises a washing motor 34, a washing pipe 35, a washing output pipe 36, a rotating shaft 37, fan blades 38, a vibrating part 39, a buffer spring 40 and a limiting rod 41, the washing motor 34 is arranged on a third supporting frame on one side of the pre-screening main body 29, the washing pipe 35 and the washing output pipe 36 are respectively arranged on two opposite sides of the pre-screening main body 29 and are communicated through a pre-screening hole 32, the washing pipe 35 is communicated with the output end of the washing motor 34, the rotating shaft 37 is rotatably arranged on the washing pipe 35, the fan blades 38 are circumferentially distributed on the rotating shaft 37 in number, a cross rod 42 is arranged at an outlet of the washing pipe 35, the vibrating part 39 is movably arranged on the cross rod 42, the cross rod 42 is provided with a limiting hole, the limiting rod 41 is arranged on the vibrating part 39 and movably connected with the limiting hole, the buffer spring 40 is sleeved on the limiting rod 41, and two ends of the buffer spring 40 are fixedly connected with the vibrating part 39 and the cross rod 42 respectively.

In this embodiment, as shown in fig. 1 and fig. 8 to 12, in order to recycle the screen 33, improve the service life of the components, and simultaneously realize automatic washing of the screen 33, the inventor refines the pre-screening mechanism and adds a washing assembly, wherein the washing assembly specifically includes a washing motor 34, a washing pipe 35, a washing output pipe 36, a rotating shaft 37, a fan blade 38, a vibrating member 39, a buffer spring 40 and a limit rod 41, and the washing motor 34 is electrically connected to a control system outside the denitration tower; when the device works, the washing motor 34 is started, the washing motor 34 extracts washing liquid and inputs the washing liquid into the washing pipe 35 at a certain pressure, the washing liquid enters the pre-sieve holes 32 and washes the sieve mesh 33, and then the washing liquid enters the washing output pipe 36 to be discharged; the flow direction of the washing liquid passing through the screen 33 is opposite to the flow direction of the liquid to be sprayed passing through the screen 33, so that the impurities intercepted on the screen 33 are washed down; the washing liquid drives the fan blades 38 to rotate on the rotating shaft 37 when passing through the washing pipe 35; the number of the fan blades 38 is several, wherein pushing parts are arranged on one sides of at least two fan blades 38 far away from the rotating shaft 37, and radial planes of the pushing parts on the two fan blades 38 on the rotating shaft 37 are not overlapped; when the fan blades 38 provided with the pushing and pressing parts rotate, the pushing and pressing parts can be in squeezing contact with the vibrating parts 39, the pushing and pressing parts push the vibrating parts 39 to move towards the direction close to the screen mesh 33, the vibrating parts 39 are in squeezing contact with the screen mesh 33, impurities intercepted on the screen mesh 33 are vibrated, impurities can be conveniently flushed from the screen mesh 33 by flushing liquid, and the flushing effect is improved; when the vibrating piece 39 approaches the screen mesh 33, the buffer spring 40 is pressed, the buffer spring 40 contracts and accumulates elastic force, the pressing force of the vibrating piece 39 and the screen mesh 33 is reduced by virtue of the buffer action of the buffer spring 40, the screen mesh 33 is prevented from deforming, and the buffer spring 40 is prevented from laterally expanding and deforming by virtue of the guide and support action of the limiting rod 41; meanwhile, after the washing operation is finished, the buffer spring 40 releases the accumulated elastic force to separate the vibrating piece 39 from the screen 33, so that the pre-screening disc 30 can rotate conveniently; the washed screen mesh 33 is moved to the next position by the pre-screening motor 31 to wait for the screen mesh 33 to be put into the screening work of the foreign matter again.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite spray gun for denitration comprises a gun body (1) and a nozzle (2), and is characterized by further comprising a quick connection mechanism, wherein the quick connection mechanism is connected and arranged between the gun body (1) and the nozzle (2) and comprises a lock catch (3) and a lock piece (4), the lock catch (3) is rotatably arranged on the gun body (1), a clamping groove (5) is formed in the lock catch (3), a locking column (6) is arranged on one side, far away from the nozzle (2), of the lock catch (3), and the locking column (6) is located on the side edge of the clamping groove (5); the locking piece (4) is arranged on the nozzle (2), a locking head (7) is arranged on one side, away from the nozzle (2), of the locking piece (4), a locking platform (8) is arranged at one end of the locking head (7), a locking groove (9) is formed in the side wall, close to one side of the locking piece (4), of the locking platform (8), when the locking piece (4) penetrates through the clamping groove (5), the locking buckle (3) is driven to rotate by an inclined plane on the locking head (7), and after the locking piece (4) is close to and penetrates through the clamping groove (5), the locking column (6) is abutted to or separated from the locking groove (9); one side of the lock head (7) far away from the locking platform (8) is provided with a limiting platform (10), and when the nozzle (2) is connected with the gun body (1), the lock catch (3) is positioned between the locking platform (8) and the limiting platform (10).

2. The composite spray gun for denitration according to claim 1, wherein the quick-connection mechanism further comprises a locking spring (11) and a guide rod (12), a guide hole is formed in one side, close to the nozzle (2), of the gun body (1), the guide rod (12) is movably arranged in the guide hole, an arc-shaped contact (13) is arranged on one side, far away from the gun body (1), of the guide rod (12), the locking spring (11) is sleeved on the guide rod (12), two ends of the locking spring (11) are fixedly connected with the arc-shaped contact (13) and the gun body (1) respectively, a sliding table (14) is arranged on one side, close to the nozzle (2), of the gun body (1), a sliding groove (15) is formed in the lock catch (3), and the sliding table (14) is movably arranged in the sliding groove (15).

3. The compound lance for denitration according to claim 1, wherein the quick-connection mechanism further comprises an unlocking assembly, the unlocking assembly comprises an unlocking ring (16) and a connecting rod (17), the unlocking ring (16) is rotatably arranged on the nozzle (2), two ends of the connecting rod (17) are respectively hinged with the unlocking ring (16) and the locking head (7), the locking piece (4) is rotatably connected with the nozzle (2), and a plurality of boosting heads are circumferentially distributed on the outer wall of the unlocking ring (16).

4. The compound lance for denitration of claim 3, wherein the quick-connection mechanism further comprises a reset assembly, the reset assembly comprises a reset spring (18) and a telescopic unit, a column (19) is arranged on one side of the nozzle (2) close to the unlocking ring (16), two ends of the telescopic unit are respectively hinged with the column (19) and the unlocking ring (16), the reset spring (18) is sleeved on the telescopic unit, and two ends of the reset spring (18) are fixed on the telescopic unit.

5. The composite lance for denitration according to claim 4, wherein the telescopic unit comprises a sliding sleeve (20) and a sliding rod (21), one of the sliding sleeve (20) and the sliding rod (21) is hinged with the upright (19), the other is hinged with the unlocking ring (16), the sliding sleeve (20) is movably connected with the sliding rod (21), and two ends of the return spring (18) are fixedly connected with the sliding sleeve (20) and the sliding rod (21), respectively.

6. The composite spray gun for denitration according to claim 1, wherein the gun body (1) comprises a liquid spraying chamber (22) and a cooling chamber (23), the cooling chamber (23) is sleeved outside the liquid spraying chamber (22), a groove (24) is formed in one side of the liquid spraying chamber (22) close to the nozzle (2), a boss (25) is arranged on one side of the nozzle (2) close to the gun body (1), and the boss (25) is clamped into the groove (24) when the gun body (1) is close to the nozzle (2); and a first through pipe and a second through pipe are respectively connected to one side of the cooling chamber (23) close to and far away from the nozzle (2).

7. The composite spray gun for denitration according to claim 6, wherein a wall cleaning mechanism is arranged on the side of the spray chamber (22) far away from the spray nozzle (2), the wall cleaning mechanism comprises a wall cleaning motor (26) and a wall cleaning knife (27), the wall cleaning motor (26) is arranged on the outer wall of the spray chamber (22), the telescopic output end of the wall cleaning motor (26) is positioned inside the spray chamber (22), the wall cleaning knife (27) is rotatably arranged on the telescopic output end of the wall cleaning motor (26), and the wall cleaning knife (27) is abutted against the inner wall of the spray chamber (22).

8. The composite lance for denitration according to claim 1, further comprising a pre-screening mechanism, wherein the pre-screening mechanism is disposed on a liquid inlet pipe (28) of the lance body (1), the pre-screening mechanism comprises a pre-screening main body (29), pre-screening trays (30) and a pre-screening motor (31), the pre-screening motor (31) is disposed on a first support frame on one side of the liquid inlet pipe (28), the pre-screening main body (29) is disposed on a second support frame on one side of the liquid inlet pipe (28), a pre-screening chamber is disposed in the pre-screening main body (29), the pre-screening tray (30) is rotatably disposed in the pre-screening chamber and is fixedly connected with an output end of the pre-screening motor (31), a plurality of pre-screening holes (32) are disposed on the pre-screening main body (29), the liquid inlet pipe (28) is fixedly communicated with one of the pre-screening holes (32), a plurality of screens (33) are disposed on the pre-screening tray (30), and the pre-screening holes (33) coincide with or separate from the pre-screening holes (32) when the pre-screening tray (30) rotates.

9. The composite spray gun for denitration according to claim 8, wherein the pre-screening mechanism further comprises a washing component, the washing component is arranged on one side of the pre-screening main body (29), the washing component comprises a washing motor (34), a washing pipe (35), a washing output pipe (36), a rotating shaft (37), fan blades (38), a vibrating piece (39), a buffer spring (40) and a limiting rod (41), the washing motor (34) is arranged on a third support frame on one side of the pre-screening main body (29), the washing pipe (35) and the washing output pipe (36) are respectively arranged on two opposite sides of the pre-screening main body (29) and are communicated with each other by virtue of the pre-screening holes (32), the washing pipe (35) is communicated with an output end of the washing motor (34), the rotating shaft (37) is rotatably arranged on the washing pipe (35), the fan blades (38) are circumferentially distributed and are arranged on the rotating shaft (37), a cross rod (42) is arranged at an outlet of the washing pipe (35), the vibrating piece (39) is movably arranged on the vibrating pipe (39), and the limiting rod (41) is connected with the limiting rod (41), and two ends of the buffer spring (40) are fixedly connected with the vibrating piece (39) and the cross rod (42) respectively.