CN219354681U - Coating spray gun with improved structure - Google Patents
Coating spray gun with improved structure Download PDFInfo
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- CN219354681U CN219354681U CN202223574925.6U CN202223574925U CN219354681U CN 219354681 U CN219354681 U CN 219354681U CN 202223574925 U CN202223574925 U CN 202223574925U CN 219354681 U CN219354681 U CN 219354681U
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- pipe
- spray head
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- outer pipe
- pipe joint
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a coating spray gun with an improved structure, which comprises an outer pipe, a middle pipe, an inner pipe, a large spray nozzle and a small spray nozzle, wherein the outer pipe, the middle pipe and the inner pipe are sequentially sleeved from outside to inside, the large spray nozzle and the small spray nozzle are respectively fixedly arranged at one ends of the middle pipe and the inner pipe, the pipe joints are fixedly connected with the other ends of the outer pipe, the middle pipe and the inner pipe, an annular primary compression air passage capable of being communicated with external compressed air is formed between the middle pipe and the outer pipe, an annular secondary compression air passage capable of being communicated with external compressed air is formed between the outer pipe and the middle pipe, a medicament channel capable of being communicated with a medicament supply pipeline is formed inside the inner pipe, a liquid spray nozzle communicated with the medicament channel is formed at one end of the small spray nozzle, a primary spray nozzle communicated with the primary compression air passage is formed at one end of the large spray nozzle, and a secondary spray nozzle communicated with the primary compression air passage is formed at one end of the outer pipe, and the secondary spray nozzle, the primary spray nozzle and the liquid spray nozzle are coaxially and directly face each other.
Description
Technical Field
The utility model relates to a coating spray gun, in particular to a coating spray gun with an improved structure.
Background
In the field of pharmacy, tablets or pellets are often coated with a coating during the preparation process, so that the taste and dissolution of the tablets or pellets are improved, the absorption site in the body is improved, the attractiveness of the tablets or pellets is increased, and particularly, some special medicaments, which have the effect of blocking outside moisture and light to improve the stability of the medicament, are required to be coated, so that the uniformity and the integrity of the coating of the tablets or pellets are important.
When the tablets or the mini-pills are coated, the tablets or the mini-pills are placed in a coating pot, and a coating spray gun sprays syrup to the tablets or the mini-pills in the coating pot along with the rotation of the coating pot, so that the syrup is uniformly coated on the outer sides of the tablets or the mini-pills.
The existing coating spray gun structure is characterized in that compressed gas is connected to the side wall of a liquid spraying channel, so that the compressed gas and syrup are sprayed out together at a liquid spraying port of the coating spray gun to realize syrup atomization, the coating spray gun with the structure has poor syrup atomization effect, part of syrup is sprayed out in a mucilage shape without atomization, mucilage syrup is stuck on a tablet or a mini-pill, uneven coating of the tablet or the mini-pill can be caused, incomplete surface coating of the tablet or the mini-pill is also easily caused, the effect of blocking moisture and light cannot be met, and the effect of preventing moisture and light cannot be normally released for part of medicines needing slow release is caused.
Disclosure of Invention
In order to overcome the defects, the utility model provides the coating spray gun with the improved structure, which can fully atomize syrup, uniformly atomize and ensure uniform and complete medicament coating.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a capsule spray gun of institutional advancement, includes outer tube, well pipe, inner tube, big shower nozzle, little shower nozzle and coupling, the inner tube insert locate with well intraductal side, well pipe insert locate the outer tube inboard, coupling fixed mounting is in outer tube, well pipe and inner tube other end, the coupling respectively with outer tube other end inside wall and well pipe and inner tube other end lateral wall sealing connection, form between well pipe and the inner tube and can with the annular one-level compression air flue of external compressed air intercommunication, form between outer tube and the well pipe and can with the annular two-level compression air flue of external compressed air intercommunication, the inner tube inboard forms the medicament passageway that can with medicament supply line intercommunication, little shower nozzle sealing fixed mounting is in inner tube one end, little shower nozzle one end is formed with the hydrojet mouth with medicament passageway intercommunication, big shower nozzle sealing fixed mounting is in well pipe one end, and big shower nozzle one end is formed with the one-level air jet mouth with one-level compression air flue intercommunication, outer tube one end is formed with the second grade mouth with one-level compression air flue intercommunication, second grade mouth, one-level air jet mouth and hydrojet mouth coaxial just set up.
As a further improvement of the utility model, the pipe joint comprises an outer pipe joint and an inner pipe joint, wherein a first-stage perforation is formed on the inner side of one end of the outer pipe joint, a second-stage perforation is formed on the inner side of the other end of the outer pipe joint, the diameter of the first-stage perforation is larger than that of the second-stage perforation, one end of the inner pipe joint is fixedly inserted into the inner side of the other end of the second-stage perforation of the outer pipe joint in a sealing manner, the other end of the inner pipe is fixedly inserted into the inner side of one end of the inner pipe joint in a sealing manner, the other end of the middle pipe is fixedly sleeved outside one end of the outer pipe joint in a sealing manner, a first-stage compressed gas inlet is formed on the side wall of the second-stage perforation of the outer pipe joint in the circumferential direction, a second-stage compressed gas inlet is formed on the side wall of the first-stage perforation of the outer pipe joint in the circumferential direction, a through hole for allowing a medicament to flow in is formed on the inner side of the inner pipe joint, and the other end of the inner pipe joint can be in sealing connection with a pipeline of a medicament supply device.
As a further improvement of the utility model, the structure of the inner pipe joint with one end sealed and fixedly inserted into the inner side of the other end of the third-stage perforation of the outer pipe joint is as follows: the fixed cover in inner tube joint one end circumference outside is equipped with at least round sealing ring, still is equipped with a spiral draw-in groove on inner tube joint one end circumference lateral wall, and its spiral draw-in groove one end forms the spiral draw-in groove opening that is located on the terminal surface of inner tube joint one end, and the spiral draw-in groove other end forms enclosed construction, be equipped with a radial lug on the second grade perforation other end inside wall of outer tube joint, this radial lug can get into in the spiral draw-in groove through spiral draw-in groove opening, and radial lug can be gliding insert locate the inside of the spiral draw-in groove of inner tube joint, sealing ring and outer tube joint second grade perforation inside wall sealing contact on inner tube joint one end lateral wall.
As a further improvement of the utility model, quick connectors which are communicated with the primary compressed gas inlet and the secondary compressed gas inlet in a sealing way are respectively arranged on the outer side wall of the circumference of the outer pipe connector.
As a further improvement of the utility model, the inner side of the small spray head is provided with a step perforation with one end having smaller inner diameter than the other end, and the outer side of one end of the small spray head is provided with a conical structure with gradually reduced size from the other end to one end.
As a further improvement of the utility model, the inner side of one end of the large spray head is provided with a conical hole with gradually reduced size from the other end to one end, the conical structure at one end of the small spray head is inserted into the conical hole at one end of the large spray head, and a conical annular channel for secondary compressed gas to flow is formed between the conical structure at one end of the small spray head and the conical inner hole at one end of the large spray head.
As a further improvement of the utility model, the axial section of the conical hole at the inner side of one end of the large spray head is an arc line.
As a further improvement of the utility model, a first conical surface and a second conical surface are sequentially formed on the outer side surface of one end of the large spray head from one end to the other end of the large spray head, the first conical surface and the second conical surface are conical surfaces with one end outer diameter smaller than the other end outer diameter, the conical degree of the first conical surface is larger than that of the second conical surface, a conical hole matched with the second conical surface is formed on the inner side wall of the secondary air nozzle at one end of the outer pipe, the first conical surface part at one end of the large spray head extends out of the secondary air nozzle at one end of the outer pipe, the liquid spraying port at one end of the small spray head is positioned at the inner side of the large spray head, and a gap for flowing secondary compressed air is formed between the end face of the liquid spraying port of the small spray head and the inner side of one end of the large spray head.
As a further improvement of the utility model, the inner hole of the outer pipe is a multi-stage stepped hole with one end diameter smaller than the diameter of the other end, the inner hole of the large spray head is a multi-stage stepped hole with one end diameter smaller than the diameter of the other end, a circle of radial convex ring is further arranged on the circumferential outer side wall of the small spray head, the circumferential outer side wall of the radial convex ring tightly abuts against the inner side wall of the large spray head, one axial end face of the radial flange is stopped on one stepped surface of the inner hole of the large spray head, a plurality of open slots penetrating through the axial two ends of the radial convex ring are uniformly arranged on the radial convex ring at intervals, a set included angle is formed between the extending direction of the open slots and the axial direction of the small spray head, a plurality of radial convex ribs are uniformly arranged on the circumferential outer side wall of the large spray head at intervals, the end parts of the radial convex ribs tightly abut against the inner side wall of the outer pipe, and one axial end of the radial convex ribs is stopped on one stepped surface formed by the inner hole of the outer pipe.
As a further improvement of the utility model, the outer tube is connected with the outer tube joint, the middle tube is connected with the outer tube joint and the inner tube is connected with the outer tube joint through threads, sealing rings are further arranged between the middle tube and the outer tube joint and between the outer tube and the outer tube joint, a circle of radial outward expansion convex baffle wall is further arranged on the outer side wall of the circumference of the other end of the middle tube, the radial outward expansion convex baffle wall is tightly abutted against a step surface formed by the first-stage perforation and the second-stage perforation of the outer tube joint, a locknut is further connected on the outer side wall of the circumference of one end of the outer tube joint in a screwed manner, and the locknut is tightly contacted with the end surface of the other end of the outer tube.
The beneficial effects of the utility model are as follows: according to the utility model, a liquid spraying port for spraying syrup, a secondary air spraying port and a primary air spraying port are formed by sequentially sleeving an outer pipe, a middle pipe and an inner pipe, the syrup is subjected to two-stage compressed air impact to form two-stage atomization, the syrup is subjected to the first-time compressed air impact to form a part which is not completely atomized, and is fully atomized after being subjected to the second-time compressed air impact, so that the syrup is fully atomized, the secondary air spraying port sprays high-pressure air to atomized syrup sprayed from the secondary air spraying port through an inclined plane towards the primary air spraying port, the final atomized syrup spraying area is larger, the full contact of the medicament in a coating pot with the atomized syrup is ensured, the uniformity and the integrity of coating are improved, the coating quality of the medicament is improved, the administration effect of the medicament is ensured, and the aesthetic property of the medicament is improved.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a bottom view of the present utility model;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic diagram of the atomization principle of the present utility model;
FIG. 5 is a perspective view of a small spray head of the present utility model;
FIG. 6 is a front view of a small spray head of the present utility model;
FIG. 7 is a top view of a small spray head of the present utility model;
FIG. 8 is a cross-sectional view taken along B-B in FIG. 7;
FIG. 9 is a perspective view of a large sprinkler of the present utility model;
FIG. 10 is a front view of a large sprinkler according to the present utility model;
FIG. 11 is a cross-sectional view taken along line C-C of FIG. 10;
FIG. 12 is a top view of a large sprinkler of the present utility model;
FIG. 13 is a view showing the construction of an inner tube according to the present utility model;
FIG. 14 is a diagram of a middle tube structure of the present utility model;
FIG. 15 is a front view of an outer tube of the present utility model;
FIG. 16 is a sectional view taken along the direction D-D in FIG. 15;
FIG. 17 is a perspective view of an outer tube fitting of the present utility model;
FIG. 18 is a front view of an outer tube fitting of the present utility model;
FIG. 19 is a sectional view taken along line E-E of FIG. 18;
FIG. 20 is a cross-sectional view taken along the direction F-F in FIG. 18;
FIG. 21 is a perspective view of an inner tube fitting of the present utility model;
fig. 22 is a front view of the inner tube fitting of the present utility model.
Detailed Description
Examples: the utility model provides a capsule spray gun of institutional advancement, includes outer tube 1, well pipe 2, inner tube 3, big shower nozzle 4, little shower nozzle 5 and coupling, inner tube 3 insert locate with well pipe 2 inboard, well pipe 2 inserts locates outer tube 1 inboard, coupling fixed mounting is in outer tube 1, well pipe 2 and inner tube 3 other end, coupling respectively with outer tube 1 other end inside wall and well pipe 2 and inner tube 3 other end lateral wall sealing connection, form annular one-level compression air flue 8 that can communicate with external compressed air between well pipe 2 and the inner tube 3, form between outer tube 1 and the inner tube 2 can with external compressed air intercommunication annular second grade compression air flue 9, inner tube 3 inboard forms can with the medicament channel of medicament supply pipe intercommunication, little shower nozzle 5 sealing fixed mounting is in inner tube 3 one end, little shower nozzle 5 one end is formed with the hydrojet mouth 10 with medicament channel intercommunication, big shower nozzle 4 sealing fixed mounting is in well pipe 2 one end, big shower nozzle 4 one end is formed with the one-level air flue 11 with one-level compression air flue 8 intercommunication, outer tube 1 one end is formed with the second grade air flue 12 with one-level compression air flue, second grade air flue 12, one-level air flue 11, and the coaxial just sets up hydrojet mouth 10.
Through the structure that inner tube 3, well pipe 2 and outer tube 1 cover were established for the hydrojet mouth 10 outside is formed with one-level air jet 11 and second grade air jet 12 respectively, and the syrup of follow hydrojet mouth 10 blowout is earlier through the compressed air impact of one-level air jet 11 forms primary atomizing state, then forms even final atomizing state through the compressed air impact of second grade air jet 12 again, and this structure has improved syrup atomizing homogeneity, can guarantee the whole atomizing of syrup, and then improves medicament coating homogeneity and integrality.
The pipe joint comprises an outer pipe joint 6 and an inner pipe joint 7, wherein a first-stage perforation 61 is formed on the inner side of one end of the outer pipe joint 6, a second-stage perforation 62 is formed on the inner side of the other end of the outer pipe joint 6, the diameter of the first-stage perforation 61 is larger than that of the second-stage perforation 62, one end of the inner pipe joint 7 is fixedly inserted into the inner side of the other end of the second-stage perforation 62 of the outer pipe joint 6 in a sealing manner, the other end of the inner pipe 3 is fixedly inserted into the inner side of one end of the inner pipe joint 7 in a sealing manner, the other end of the middle pipe 2 is fixedly inserted into the inner side of one end of the second-stage perforation 62 of the outer pipe joint 6 in a sealing manner, a first-stage compressed gas inlet 63 is formed on the side wall of the second-stage perforation 62 of the outer pipe joint 6 in the circumferential direction, a through hole for allowing a medicament to flow in is formed on the inner side of the inner pipe joint 7, and the other end of the inner pipe joint 7 can be connected with a pipeline of a medicament supply device in a sealing manner. The outer tube joint 6 is used for being fixedly connected with the outer tube 1 and the middle tube 2, the inner tube joint 7 is used for being fixedly connected with the inner tube 3, the inner tube joint 7 and the outer tube joint 6 are of a split structure, the inner tube 3, the middle tube 2 and the outer tube 1 are convenient to connect and position, and the syrup supply device is convenient to connect.
The structure of the inner side of the other end of the third-stage perforation of the outer pipe joint 6 is that one end of the inner pipe joint 7 is fixedly inserted in a sealing way: the fixed cover in inner tube joint 7 one end circumference outside is equipped with at least one round sealing ring 14, still is equipped with a spiral draw-in groove 71 on inner tube joint 7 one end circumference lateral wall, and its spiral draw-in groove 71 one end forms the spiral draw-in groove 71 opening that is located on the terminal surface of inner tube joint 7 one end, and the spiral draw-in groove 71 other end forms the enclosed construction, be equipped with a radial lug 65 on the second level perforation 62 other end inside wall of outer tube joint 6, this radial lug 65 can get into in the spiral draw-in groove 71 through spiral draw-in groove 71 opening, and radial lug 65 can be slided insert locate the inside of spiral draw-in groove 71 of inner tube joint 7, sealing ring 14 on inner tube joint 7 one end lateral wall and outer tube joint 6 second level perforation 62 inside wall sealing contact. The structure facilitates the fixed connection and disassembly of the inner pipe joint 7 and the outer pipe joint 6, and the inner pipe 3 is connected with the pipeline of the syrup supply device during use, and can be in fixed connection with the outer pipe joint 6 by one insertion and one screwing, so that the connection is convenient.
The outer pipe joint 6 is provided with quick connectors 66 on the peripheral outer side wall which are respectively communicated with the primary compressed gas inlet 63 and the secondary compressed gas inlet 64 in a sealing way.
The inner side of the small spray head 5 is provided with a step perforation with one end inner diameter smaller than the inner diameter of the other end, and the outer side of one end of the small spray head 5 is provided with a conical structure 51 with gradually reduced size from the other end to one end. Is convenient to form a cone-shaped primary compressed air channel in cooperation with the large spray head 4, so that primary compressed air is sprayed towards the spray nozzle 10.
The inner side of one end of the large spray head 4 is provided with a conical hole 41 with gradually reduced size from the other end to one end, a conical structure 51 at one end of the small spray head 5 is inserted into the conical hole 41 at one end of the large spray head 4, and a conical annular channel for secondary compressed gas to flow is formed between the conical structure 51 at one end of the small spray head 5 and the conical inner hole at one end of the large spray head 4.
The axial section of the conical hole 41 at the inner side of one end of the large spray head 4 is an arc line.
The circumference lateral surface of one end of the large spray head 4 is sequentially provided with a first conical surface 42 and a second conical surface 43 from one end of the large spray head 4 to the other end, the first conical surface 42 and the second conical surface 43 are conical surfaces with one end outer diameter smaller than the outer diameter of the other end, the taper of the first conical surface 42 is larger than that of the second conical surface 43, the inner side wall of the secondary air nozzle 12 at one end of the outer tube 1 forms a conical hole 41 matched with the second conical surface 43, the first conical surface 42 at one end of the large spray head 4 partially extends out of the secondary air nozzle 12 at one end of the outer tube 1, the liquid spraying port 10 at one end of the small spray head 5 is positioned at the inner side of the large spray head 4, and a gap for flowing secondary compressed air is formed between the end surface of the liquid spraying port 10 of the small spray head 5 and the inner side of one end of the large spray head 4. This configuration allows the secondary compressed gas to be gradually injected toward the primary gas injection port 11 along the second conical surface 43 and the first conical surface 42, so that the primary atomized syrup is secondarily atomized, and the injection angle after atomization is large.
The inner hole of the outer pipe 1 is a multi-stage stepped hole with one end diameter smaller than that of the other end, the inner hole of the large spray head 4 is a multi-stage stepped hole with one end diameter smaller than that of the other end, a circle of radial convex ring 52 is further arranged on the circumferential outer side wall of the small spray head 5, the circumferential outer side wall of the radial convex ring 52 tightly abuts against the inner side wall of the large spray head 4, an axial end face of the radial flange is stopped on one step surface of the inner hole of the large spray head 4, a plurality of open slots 53 penetrating through the axial two ends of the radial convex ring 52 are uniformly arranged on the radial convex ring 52 at intervals, a set included angle exists between the extending direction of the open slots 53 and the axial direction of the small spray head 5, a plurality of radial convex ribs 44 are uniformly arranged on the circumferential outer side wall of the large spray head 4, the end of the radial convex ribs 44 tightly abuts against the inner side wall of the outer pipe 1, and one axial end of the radial convex ribs 44 is stopped on one step surface formed by the inner hole of the outer pipe 1. The axial included angle between the opening groove 53 on the small spray head 5 and the small spray head 5 is optimally 45 degrees, so that primary compressed air is sprayed spirally, the syrup atomization effect is improved, a channel for the secondary compressed air to pass through is formed between the radial ribs 44 on the outer side of the large spray head 4, and the secondary compressed air sprayed along the bus direction of the large spray head 4 is crossed with the primary compressed air, so that the syrup is sprayed forwards in a large area after secondary atomization.
The outer tube 1 is connected with the outer tube joint 6, the middle tube 2 is connected with the outer tube joint 6 and the inner tube 3 is connected with the outer tube joint 6 through threads, sealing rings are further arranged between the middle tube 2 and the outer tube joint 6 and between the outer tube 1 and the outer tube joint 6, a circle of radially outward expansion convex baffle wall 21 is further arranged on the outer side wall of the circumference of the other end of the middle tube 2, the radially outward expansion convex baffle wall 21 tightly abuts against the step surface formed by the first-stage perforation 61 and the second-stage perforation 62 of the outer tube joint 6, a locknut 13 is further connected onto the outer side wall of the circumference of one end of the outer tube joint 6 in a screwed mode, and the locknut 13 is in tight contact with the end face of the other end of the outer tube 1.
Claims (10)
1. A coating spray gun with improved structure, which is characterized in that: including outer tube (1), well pipe (2), inner tube (3), big shower nozzle (4), little shower nozzle (5) and coupling, the inner tube is inserted and is located the well intraductal, and the outer tube is inserted and is located the inner tube, and coupling fixed mounting is in outer tube, well pipe and inner tube other end, coupling respectively with outer tube other end inside wall and well pipe and inner tube other end lateral wall sealing connection, form annular one-level compression air flue (8) that can communicate with external compressed air between well pipe and the inner tube, form between outer tube and the well pipe can with external compressed air intercommunication annular second grade compression air flue (9), the inner tube inboard form can with the medicament passageway of medicament supply pipeline intercommunication, little shower nozzle sealing fixed mounting is in inner tube one end, little shower nozzle one end be formed with medicament passageway intercommunication hydrojet mouth (10), big shower nozzle sealing fixed mounting is in well pipe one end, big shower nozzle one end be formed with one-level compression air flue intercommunication one-level air flue's second grade air flue (12), outer tube one end be formed with one-level compression air flue's second grade air flue (12), one-level air flue and mouth coaxial just set up.
2. The structurally improved coating gun according to claim 1, characterized in that: the pipe joint comprises an outer pipe joint (6) and an inner pipe joint (7), wherein a first-stage perforation (61) is formed on the inner side of one end of the outer pipe joint, a second-stage perforation (62) is formed on the inner side of the other end of the outer pipe joint, the diameter of the first-stage perforation is larger than that of the second-stage perforation, one end of the inner pipe joint is fixedly inserted into the inner side of the second-stage perforation of the outer pipe joint in a sealing manner, the other end of the inner pipe is fixedly inserted into one end of the inner pipe joint in a sealing manner, the other end of the middle pipe is fixedly inserted into one end of the second-stage perforation of the outer pipe joint in a sealing manner, the other end of the outer pipe is fixedly sleeved outside one end of the outer pipe joint in a fixing manner, a first-stage compressed gas inlet (63) is formed in the side wall of the second-stage perforation circumferential direction of the outer pipe joint, a through hole for the inflow of a medicament is formed in the inner pipe joint in a sealing manner, and the other end of the inner pipe joint can be connected with a pipeline of a medicament supply device in a sealing manner.
3. The structurally improved coating gun according to claim 2, characterized in that: the structure of the inner side of the other end of the third-stage perforation of the outer tube joint is that one end of the inner tube joint is sealed and fixedly inserted and arranged: the fixed cover in inner tube joint one end circumference outside is equipped with at least round sealing ring (14), still is equipped with a spiral draw-in groove (71) on inner tube joint one end circumference lateral wall, and its spiral draw-in groove one end forms the spiral draw-in groove opening that is located on the terminal surface of inner tube joint one end, and the spiral draw-in groove other end forms enclosed construction, be equipped with a radial lug (65) on the second grade perforation other end inside wall of outer tube joint, this radial lug can get into the spiral draw-in groove through spiral draw-in groove opening, and radial lug can be gliding insert locate the inside of inner tube joint's the spiral draw-in groove, sealing ring and outer tube joint second grade perforation inside wall sealing contact on inner tube joint one end lateral wall.
4. The structurally improved coating gun according to claim 2, characterized in that: quick connectors (66) which are communicated with the primary compressed gas inlet and the secondary compressed gas inlet in a sealing way are respectively arranged on the outer side wall of the circumference of the outer tube connector.
5. The structurally improved coating gun according to claim 1, characterized in that: the inner side of the small spray head is provided with a step perforation with one end inner diameter smaller than the inner diameter of the other end, and the outer side of one end of the small spray head is provided with a conical structure (51) with gradually reduced size from the other end to one end.
6. The structurally improved coating gun according to claim 5, characterized in that: the inner side of one end of the large spray head is provided with a conical hole (41) with gradually reduced size from the other end to one end, the conical structure of one end of the small spray head is inserted into the conical hole of one end of the large spray head, and a conical annular channel for secondary compressed gas to flow is formed between the conical structure of one end of the small spray head and the conical inner hole of one end of the large spray head.
7. The structurally improved coating gun according to claim 6, characterized in that: the axial section of the conical hole at the inner side of one end of the large spray head is an arc line.
8. The structurally improved coating gun according to claim 1, characterized in that: the circumference lateral surface of one end of the large spray head is sequentially provided with a first conical surface (42) and a second conical surface (43) from one end of the large spray head to the other end, the first conical surface and the second conical surface are conical surfaces with one end outer diameter smaller than the other end outer diameter, the taper of the first conical surface is larger than that of the second conical surface, the inner side wall of the secondary air nozzle at one end of the outer pipe forms a conical hole matched with the second conical surface, the first conical surface part of one end of the large spray head extends out of the outer side of the secondary air nozzle at one end of the outer pipe, the liquid spraying port at one end of the small spray head is positioned at the inner side of the large spray head, and a gap for flowing secondary compressed air is formed between the end face of the liquid spraying port of the small spray head and the inner side of the large spray head.
9. The structurally improved coating gun according to claim 1 or 8, characterized in that: the inner hole of the outer pipe is a multistage stepped hole with one end diameter smaller than the diameter of the other end, the inner hole of the large spray nozzle is a multistage stepped hole with one end diameter smaller than the diameter of the other end, a circle of radial convex ring (52) is further arranged on the outer side wall of the circumference of the small spray nozzle, the outer side wall of the circumference of the radial convex ring tightly abuts against the inner side wall of the large spray nozzle, an axial end face of the radial flange is stopped on one stepped surface of the inner hole of the large spray nozzle, a plurality of open slots (53) penetrating through the axial two ends of the radial convex ring are uniformly arranged on the radial convex ring at intervals, a set included angle exists between the extending direction of the open slots and the axial direction of the small spray nozzle, a plurality of radial convex ribs (44) are uniformly arranged on the outer side wall of the circumference of the large spray nozzle, the end parts of the radial convex ribs tightly abut against the inner side wall of the outer pipe, and one axial end of the radial convex ribs is stopped on one stepped surface formed by the inner hole of the outer pipe.
10. The structurally improved coating gun according to claim 2, characterized in that: the outer pipe is connected with the outer pipe joint, the middle pipe is connected with the outer pipe joint and the inner pipe is connected with the outer pipe joint through threads, a sealing ring is further arranged between the middle pipe and the outer pipe joint and between the outer pipe and the outer pipe joint, a circle of radial outward expansion convex baffle wall (21) is further arranged on the outer side wall of the circumference of the other end of the middle pipe, the radial outward expansion convex baffle wall tightly abuts against a step surface formed by the first-stage perforation and the second-stage perforation of the outer pipe joint, a locknut (13) is further connected onto the outer side wall of the circumference of one end of the outer pipe in a threaded manner, and the locknut is in tight contact with the end surface of the other end of the outer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223574925.6U CN219354681U (en) | 2022-12-30 | 2022-12-30 | Coating spray gun with improved structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223574925.6U CN219354681U (en) | 2022-12-30 | 2022-12-30 | Coating spray gun with improved structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219354681U true CN219354681U (en) | 2023-07-18 |
Family
ID=87117053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223574925.6U Active CN219354681U (en) | 2022-12-30 | 2022-12-30 | Coating spray gun with improved structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219354681U (en) |
-
2022
- 2022-12-30 CN CN202223574925.6U patent/CN219354681U/en active Active
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