Suction tube rotating device and spray gun comprising same

Abstract

A suction tube rotating device and a spray gun comprising same. The suction tube rotating device comprises: a rotary knob (1), which is rotationally arranged at the top of a gun body (80) of the spray gun; a rotating connection portion (3), which is arranged on the rotary knob (1) at one end and is movably inserted into a material suction hole (81) of the spray gun; and an angled suction tube (6), which comprises a straight tube (61) and an inclined tube (62) connected to each other, the straight tube (61) being rotationally arranged in the material suction hole (81) and is connected to the other end of the rotating connection portion (3), the inclined tube (62) being arranged obliquely, and the end portion of the inclined tube (62) being close to the connection between the side wall and the bottom of a material barrel (91) of the spray gun. The suction tube rotating device can not only conveniently adjust the angle of the suction tube, but is also always located at the edge of the material barrel to enable the suction tube to be always inserted into a raw material, such that the material suction amount can be maximized and residue of the raw material is reduced, thereby improving the utilization rate of the raw material and the reliability and stability of material suction, and the suction tube can rotate freely without being affected by the viscosity of the raw material.

Description

A suction pipe rotating device and a spray gun thereof TECHNICAL FIELD

[0001] The present application relates to a spray gun, in particular to a suction pipe rotating device and a spray gun thereof. BACKGROUND

[0002] In actual work, the spray gun can exist upward spraying and downward spraying angle injection, that is, the bucket will be in an inclined state, at this time, the liquid raw material in the bucket will converge to the lowest part of the bucket due to the change of the angle of the spray gun. The existing suction pipe of the spray gun is generally a straight pipe type, which has the problem that when the raw material in the bucket is almost gone, the remaining raw material is concentrated in the corner of the inclined side, resulting in that a large amount of raw material cannot be normally sucked. In order to solve this problem, a soft suction pipe appears, such as the spray gun capable of freely swinging the suction pipe disclosed in CN209317956U, which adopts a soft suction pipe and connects a gravity ball at the bottom of the soft suction pipe. When the spray gun is inclined to work, the raw material in the bucket will converge to the lowest part of the bucket under the action of gravity, and the gravity ball will also move to the lowest part of the bucket under the action of gravity, thereby driving the soft suction pipe to bend, so that the feeding end of the soft suction pipe can always be located at the lowest part of the bucket and cannot suck the raw material due to the inclination of the bucket. However, the spray gun has the following disadvantages:

[0003] 1. The soft gravity swing will be affected by the viscosity of the raw material. When the viscosity of the raw material is high, the swing is not flexible, and the liquid raw material cannot be quickly and effectively contacted;

[0004] 2. When the length of the soft suction pipe is relatively long, the feeding end will be upwardly tilted, and when the bucket is in a horizontal state, a certain amount of raw material cannot be sucked. When the length of the soft suction pipe is relatively short, the soft suction pipe swings to the edge of the bucket under the action of the gravity ball, but cannot fall to the lowest part, and cannot completely suck the raw material, and the raw material residue is relatively large, as shown in FIG. 14;

[0005] 3. The softness of the soft suction pipe is difficult to control. If it is too soft, the feeding will be blocked due to the pressure in the bucket, and if it is too hard, the swing will not be flexible. TECHNICAL PROBLEM

[0006] The above-mentioned soft suction pipe cannot freely swing due to the influence of the viscosity of the raw material, the raw material residue is relatively large, and the softness is difficult to control. TECHNICAL SOLUTION

[0007] In order to solve the problems that the above-mentioned soft suction pipe cannot freely swing due to the influence of the viscosity of the raw material, the raw material residue is relatively large, and the softness is difficult to control, the present application provides a suction pipe rotating device, and the specific technical scheme is as follows:

[0008] A kind of straw rotating device, comprising: rotary knob, top of the body of the spray gun is rotated and set;Rotary connecting portion, one end is arranged on the rotary knob, and is movably inserted in the suction hole of the spray gun;And angle straw, comprising straight pipe and inclined pipe connected with each other, the straight pipe is rotated and set in the suction hole, and is connected with the other end of the rotary connecting portion, the inclined pipe is arranged obliquely, and the end of the inclined pipe is close to the junction of the sidewall and the bottom of the bucket of the spray gun.

[0009] Preferably, the rotary connecting portion includes: connecting support, which is rotated and set in the suction hole;And connecting rod, one end is arranged on the connecting support, and the other end is connected with the straight pipe.

[0010] Preferably, further comprising: positioning sleeve, arranged on the top of the body, and rotated between the rotary knob and the rotary connecting portion, for limiting the axial position of the rotary connecting portion.

[0011] Preferably, further comprising: straw matching sleeve, arranged in the suction hole of the spray gun, the inside of the straw matching sleeve is provided with a positioning ring and a plurality of connecting ribs connected with the positioning ring and the straw matching sleeve respectively, and the rotary connecting portion is rotatably inserted in the positioning ring.

[0012] Preferably, further comprising: rotary connecting seat, arranged on the bottom of the rotary connecting portion, a plurality of driving plates are arranged on the rotary connecting seat, and the driving plates are movably inserted in the driving groove on the top of the straight pipe.

[0013] Further, a plurality of connecting external teeth are arranged in annular array on the rotary connecting portion, a connecting hole is arranged on the rotary connecting seat, a plurality of connecting internal teeth are arranged in annular array on the connecting hole, the rotary connecting portion is inserted in the connecting hole, and the connecting external teeth are engaged with the connecting internal teeth.

[0014] Preferably, the feed end of the inclined pipe is provided with a suction slope for reducing the gap between the end of the inclined pipe and the bucket.

[0015] Preferably, a plurality of first sealing rings are arranged between the rotary connecting portion and the suction hole;A plurality of second sealing rings are arranged between the straight pipe and the straw matching sleeve.

[0016] A spray gun, comprising: the above-mentioned straw rotating device;And sealing device, the sealing device is arranged between the body and the bucket.

[0017] Preferably, the sealing device comprises a sealing ring arranged on the gun body and located at the top of the material bucket, a sealing disc arranged on the sealing ring and provided with a fourth sealing groove, a second air hole arranged at the bottom of the fourth sealing groove and a plurality of air columns, and a sealing gasket sealingly arranged on the fourth sealing groove and provided with a plurality of air slits located between adjacent air columns. Advantages

[0018] Compared with the prior art, the present application has the following advantages:

[0019] The straw rotating device provided by the present application can conveniently adjust the angle of the straw, and is always located at the edge of the material bucket, so that the straw is always inserted into the raw material, the amount of raw material sucked can be maximized, the residual raw material is reduced, the utilization rate of raw material is improved, and the reliability and stability of raw material suction are improved. Moreover, the straw rotating device is not affected by the viscosity of the raw material and can rotate freely. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural schematic view of the straw rotating device;

[0021] Fig. 2 is a sectional view of the straw rotating device;

[0022] Fig. 3 is an assembly view of the rotating knob and the rotating connecting part;

[0023] Fig. 4 is a structural schematic view of the connecting support;

[0024] Fig. 5 is a front view of the straw fitting sleeve;

[0025] Fig. 6 is a front view of the rotating connecting seat;

[0026] Fig. 7 is an assembly view of the rotating connecting seat and the angle straw;

[0027] Fig. 8 is a structural schematic view of the spray gun;

[0028] Fig. 9 is a sectional view of the spray gun;

[0029] Fig. 10 is an exploded view of the spray gun;

[0030] Fig. 11 is a schematic view of the spray gun in an inclined state;

[0031] Fig. 12 is a structural schematic view of the sealing disc;

[0032] Fig. 13 is a structural schematic view of the sealing gasket;

[0033] Fig. 14 is a schematic view of the soft straw in the prior art which cannot fall to the lowest position of the material bucket. Best mode for carrying out the present application

[0034] The present application will be further described in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] As shown in FIGS. 1-11, a kind of straw rotating device, including rotating knob 1, rotating connecting portion 3 and angle straw 6;Rotating knob 1 rotates the top of the gun body 80 of spray gun, and is connected with one end of rotating connecting portion 3, rotating connecting portion 3 is movably inserted in the material suction hole 81 of spray gun, angle straw 6 includes straight pipe 61 and inclined pipe 62 connected with each other, straight pipe 61 is rotatably installed in material suction hole 81, and the other end of rotating connecting portion 3 is connected to the top of straight pipe 61, and inclined pipe 62 is obliquely arranged, and the end of inclined pipe 62 is close to the junction of the side wall and bottom of material bucket 91. The included angle between straight pipe 61 and inclined pipe 62 is obtuse, straight pipe 61 is coaxially arranged with material suction hole 81, in vertical state, inclined pipe 62 is in inclined state, and is inclined to the junction of the side wall and bottom of material bucket 91, so that the end of inclined pipe 62 is close to the junction of the side wall and bottom of material bucket 91, can rotate to the inside of raw material to suck material when material bucket 91 is inclined, reduce the residue of raw material.

[0037] Rotating connecting portion 3 is connected with angle straw 6 through gun body 80, in turn, it is convenient to rotate angle straw 6 by rotating knob 1, and rotating knob 1 drives angle straw 6 to rotate at any angle in material bucket 91 through rotating connecting portion 3, so that the position of feeding end of angle straw 6 can be flexibly adjusted according to the state of material bucket 91 when working, so that the feeding end of angle straw 6 can always be in the inside of liquid raw material, in turn, it is guaranteed that raw material can be fully sucked, the residue of raw material is reduced, and the utilization rate of raw material is improved.

[0038] As shown in FIGS. 2 and 9, in order to maximize the raw material, reduce the residue of raw material, the feeding end of inclined pipe 62 is provided with material suction slope 63, and material suction slope 63 is used to reduce the gap between the end of inclined pipe 62 and material bucket 91, so that the feeding end can be close to the bottom of material bucket 91, and the maximum amount of material is sucked.

[0039] As shown in FIG. 5 and FIG. 9, in order to facilitate the radial positioning of the rotating connecting part 3, a suction pipe fitting sleeve (4) is further included, which is installed at the bottom of the suction hole (81) of the spray gun and movably inserted into the other end of the rotating connecting part (3). The suction pipe fitting sleeve 4 can be connected with the suction hole 81 through threads or fixedly connected through glue. The suction pipe fitting sleeve 4 is in sealing connection with the suction hole 81. As shown in FIG. 5, the inside of the suction pipe fitting sleeve 4 is provided with a positioning ring 41 and a connecting rib 42. The positioning ring 41 is coaxially arranged with the suction pipe fitting sleeve 4 and connected with the suction pipe fitting sleeve 4 through the connecting rib 42. The connecting rib 42 is annularly arranged in an array of three, and a material passing groove 43 is formed between adjacent connecting ribs 42, which is used for communicating the suction hole 81 with the straight pipe 61. The suction pipe fitting sleeve 4, the positioning ring 41 and the connecting rib 42 are in an integral structure. The connecting rod 32 is movably inserted into the positioning ring 41. The diameter of the positioning ring 41 is slightly larger than that of the connecting rod 32, so as to realize the radial positioning of the bottom of the connecting rod 32. The connecting support 31 and the positioning ring 41 realize the radial positioning of the upper and lower ends of the connecting rod 32, thereby improving the stability of the connecting rod 32.

[0040] As shown in FIG. 2, the top of the straight pipe 61 is provided with two annular second sealing grooves, in which second sealing rings 902 are arranged. The second sealing rings 902 are movably inserted into the inside of the suction pipe fitting sleeve 4, so as to realize the sealing between the suction pipe fitting sleeve 4 and the straight pipe 61.

[0041] As shown in FIG. 2 and FIG. 3, the rotating connecting part 3 includes a connecting support 31 and a connecting rod 32. The top of the connecting support 31 is fixedly connected with the rotating knob 1 through screws. The bottom of the connecting support 31 is fixedly connected with the top of the connecting rod 32. The connecting rod 32 is movably inserted into the suction hole 81. The diameter of the connecting rod 32 is smaller than that of the suction hole 81, which does not affect the material suction of the suction hole 81. The bottom of the connecting rod 32 is connected with the top of the straight pipe 61. The connecting support 31 is provided with two annular first sealing grooves, in which first sealing rings 901 are arranged. The first sealing rings 901 are movably inserted into the suction hole 81, so as to realize the sealing between the connecting support 31 and the suction hole 81, that is, the sealing of the top of the suction hole 81. The connecting support 31 facilitates the sealing and the connection between the rotating knob 1 and the connecting rod 32, solves the problem that the connecting rod 32 cannot be sealed due to its small diameter, improves the strength, can bear a larger radial force, improves the reliability and stability of rotation, and realizes the radial positioning of the top of the connecting rod 32.

[0042] As shown in FIGS. 2-4, in order to realize axial positioning of the rotating connecting part 3 and prevent the rotating connecting part 3 from moving up and down along the axis, a positioning sleeve 2 is further included, one end of the positioning sleeve 2 is threadedly installed on the top of the gun body 80, the other end is provided with a rotating hole 21, the top of the connecting support 31 is provided with a rotating column 311, the rotating column 311 is movably inserted into the rotating hole 21, and the diameter of the rotating column 311 is smaller than the diameter of the connecting support 31, so that an axial shoulder 312 is formed, the axial shoulder 312 movably abuts against the inside of the positioning sleeve 2, the rotating column 311 is connected with the rotating knob 1, the rotating knob 1 movably abuts against the top of the positioning sleeve 2, the positioning sleeve 2 is movably clamped between the rotating knob 1 and the connecting support 31, thereby realizing axial positioning of the rotating connecting part 3, so that the rotating knob 1 and the rotating connecting part 3 can only rotate and cannot move up and down along the axis.

[0043] As shown in FIGS. 6 and 7, in order to facilitate assembly and production, the connecting rod 32 is connected with the angle suction pipe 6 through the rotating connecting seat 5. The outer circular surface of the rotating connecting seat 5 is annularly arranged with three driving plates 51, the center of the rotating connecting seat 5 is provided with a connecting hole 52, the connecting rod 32 is inserted into the connecting hole 52, thereby realizing connection of the rotating connecting seat 5 and the connecting rod 32. The top of the straight pipe 61 is annularly arranged with three driving grooves 66, the driving grooves 66 correspond to the driving plates 51 one by one, the driving plates 51 are movably inserted into the driving grooves 66, and the driving plates 51 drive the angle suction pipe 6 to rotate through the driving grooves 66. The inner circular surface of the connecting hole 52 is annularly arranged with a plurality of connecting inner teeth 53, the outer circular surface of the bottom of the connecting rod 32 is annularly arranged with a plurality of connecting outer teeth 321, the connecting outer teeth 321 are inserted into the connecting inner teeth 53 and are in meshing relationship, which can not only ensure reliable connection of the connecting rod 32 and the rotating connecting seat 5, but also prevent relative rotation between the connecting rod 32 and the rotating connecting seat 5, so that the rotating connecting seat 5 can synchronously rotate with the connecting rod 32.

[0044] The straight pipe 61 is further provided with a supporting ring 64, the supporting ring 64 is movably located below the sealing device of the spray gun, and the supporting ring 64 is used for supporting the sealing device and realizing positioning of the sealing device. Embodiments of the application

[0045] Example 2

[0046] As shown in FIG. 8 to FIG. 13, a kind of spray gun, including a suction pipe rotating device.The spray gun also includes bucket 91, gun body 80, sealing device, valve needle 83, nozzle 86, atomizing cap 87, compression nut 88, spring 84, wrench 89 and connecting pin 85, gun body 80 is installed on the top of bucket 91 by thread, sealing device is installed between bucket 91 and gun body 80, angle suction pipe 6 is inserted in sealing device.Gun body 80 is provided with valve hole 82 and suction hole 81 that are communicated with each other in the inside, suction hole 81 is vertically arranged along the axis, valve hole 82 is arranged along the horizontal direction, suction hole 81 and valve hole 82 form cross-shaped passage.Valve needle 83 is inserted in valve hole 82, one end of gun body 80 is sequentially provided with nozzle 86, atomizing cap 87 and compression nut 88, nozzle 86 is communicated with valve hole 82, compression nut 88 fixes atomizing cap 87 and nozzle 86 on gun body 80, and is compressed in the end of valve hole 82.Valve needle 83 is inserted in valve hole 82, and two third sealing rings 903 are installed on valve needle 83, to realize the sealing between valve needle 83 and valve hole 82, and third sealing ring 903 is also located in the side of suction hole 81.Spring 84 is located in the end of valve hole 82 away from nozzle 86, and the two ends of spring 84 are respectively abutted on the bottom of valve hole 82 and the end of valve needle 83, for making valve needle 83 compress on nozzle 86.The top of wrench 89 is rotatably installed on rotating pin 801 of the top of gun body 80, wrench 89 is rotatably connected with valve needle 83 by connecting pin 85, and connecting pin 85 is located between third sealing ring 903 and spring 84.Valve needle 83 can be controlled to move by wrench 89, to control the opening between valve needle 83 and nozzle 86, and to adjust the spray amount.The inside of gun body 80 is also provided with first air hole 801 communicated with bucket 91, and first air hole 801 is used to enter high-pressure gas.Sealing device includes sealing ring 92, sealing disc 93 and sealing pad 94, the outer diameter of sealing ring 92 is same with the top of bucket 91, for the sealing between gun body 80 and bucket 91, and is clamped on gun body 80, the outer circular surface of sealing disc 93 is provided with fifth sealing groove 934, fifth sealing groove 934 is inserted on sealing ring 92, the top of sealing disc 93 is provided with fourth sealing groove 931 and air column 932, air column 932 is provided with four, air column 932 is annularly arranged in the bottom of fourth sealing groove 931, the bottom of fourth sealing groove 931 is also provided with second air hole 933, sealing pad 94 is sealingly installed in fourth sealing groove 931, and is abutted on air column 932, sealing pad 94 is annular, and four air slits 941 are annularly arranged on sealing pad 94, air slit 941 is located between adjacent air column 932, that is, air slit 941 and air column 932 are staggered, air slit 941 is used to form one-way air, so that high-pressure gas can enter into fourth sealing groove 931 through air slit 941 on sealing pad 94, then enters into bucket 91 through second air hole 933.The air passage slit 941 is only for air passage, and can prevent liquid raw material from entering above the sealing pad 94 to limit the raw material in the bucket 91. The sealing pad 94 is made of elastic material, and the air passage column 932 is used to form an air passage cavity between the sealing pad 94 and the fourth sealing groove 931, so as to facilitate the downward deformation of the air passage slit 941 of the sealing pad 94 to realize the opening of the air passage slit 941, and the air passage column 932 is used to support the sealing pad 94. The air passage slit 941 is in a long strip shape or a cross shape. When the high-pressure gas enters above the sealing pad 94 through the first air passage hole 801, the high-pressure gas pushes the air passage slit 941 to deform towards the air passage cavity, that is, the air passage slit 941 deforms towards the fourth sealing groove 931 to realize the opening of the air passage slit 941, the high-pressure gas enters the air passage cavity, and then enters the inside of the bucket 91 through the second air passage hole 933, and then pushes the raw material in the inside of the bucket 91 to the nozzle 86.

[0047] The straight pipe 61 is rotatably inserted on the sealing pad 94 and the sealing disc 93, the sealing pad 94 is made of elastic material, and rubber can be used, so that the sealing pad 94 and the straight pipe 61 form a seal, the supporting ring 64 is movably arranged on the sealing disc 93 to support the sealing disc 93, and the sealing disc 93 and the sealing pad 94 are prevented from moving axially.

[0048] The valve needle 83 is provided with a first through hole 831 in a waist shape, the first through hole 831 is movably inserted on the connecting rod 32, so that the connecting rod 32 and the valve needle 83 do not interfere with each other and work independently.

[0049] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be explained as limitations on the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative labor, and these embodiments will fall within the protection scope of the claims of the present application. Industrial applicability

[0050] Enter the industrial applicability description paragraph here. Free content of the sequence listing

[0051] Enter the free content description paragraph of the sequence listing here.

Claims

1. A straw rotating device, characterized by, The application relates to a rotary nozzle for a spray gun, which comprises the following parts: a rotary knob (1) arranged on the top of a gun body (80) of the spray gun; a rotary connecting part (3) arranged on one end of the rotary knob (1) and movably inserted into a suction hole (81) of the spray gun; and an angle suction pipe (6) comprising a straight pipe (61) and an inclined pipe (62), wherein the straight pipe (61) is arranged in the suction hole (81) and connected to the other end of the rotary connecting part (3), and the inclined pipe (62) is arranged in an inclined mode, and the end of the inclined pipe (62) is close to the joint of a side wall and a bottom of a material bucket (91) of the spray gun. The rotary connecting part (3) comprises:

2. A straw rotating device according to claim 1, wherein a connecting support (31) arranged in the suction hole (81); and a connecting rod (32) arranged on one end of the connecting support (31) and connected to the other end of the straight pipe (61). The application further comprises:

3. A straw rotating device according to claim 1, wherein a positioning sleeve (2) arranged on the top of the gun body (80) and arranged between the rotary knob (1) and the rotary connecting part (3) to limit the axial position of the rotary connecting part (3). The application further comprises:

4. A straw rotating device according to claim 1, wherein a suction pipe matching sleeve (4) arranged in the suction hole (81) of the spray gun, wherein the inside of the suction pipe matching sleeve (4) is provided with a positioning ring (41) and a plurality of connecting ribs (42) connected to the positioning ring (41) and the suction pipe matching sleeve (4) respectively, and the rotary connecting part (3) is rotatably inserted into the positioning ring (41). The application further comprises:

5. A straw rotating device according to claim 1, wherein a rotary connecting seat (5) arranged on the bottom of the rotary connecting part (3), wherein a plurality of driving plates (51) are arranged on the rotary connecting seat (5), and the driving plates (51) are movably inserted into driving grooves (66) arranged on the top of the straight pipe (61). A plurality of connecting external teeth (321) are arranged in an annular mode on the rotary connecting part (3), a connecting hole (52) is arranged on the rotary connecting seat (5), a plurality of connecting internal teeth (53) are arranged in an annular mode on the connecting hole (52), the rotary connecting part (3) is inserted into the connecting hole (52), and the connecting external teeth (321) are engaged with the connecting internal teeth (53).

6. A straw rotating device according to claim 5, wherein A material suction inclined surface (63) is arranged on the material inlet end of the inclined pipe (62) to reduce the gap between the end of the inclined pipe (62) and the material bucket (91).

7. A straw rotating device according to claim 1, wherein A plurality of first sealing rings (901) are arranged between the rotary connecting part (3) and the suction hole (81).

8. A straw rotating device according to claim 1, wherein The application further comprises:

9. A spray gun characterized by the suction pipe rotary device of any one of claims 1 to 8; and a sealing device arranged between the gun body (80) and the material bucket (91). The sealing device comprises: a sealing ring (92) arranged on the gun body (80) and located on the top of the material bucket (91); 10. A lance according to claim 9, characterized in that a sealing disc (93) arranged on the sealing ring (92) and provided with a fourth sealing groove (931), a second air hole (933) arranged on the bottom of the fourth sealing groove (931) and a plurality of air columns (932); and ​ ​ A sealing gasket (94) is sealingly arranged on the fourth sealing groove (931) and is provided with a plurality of venting slits (941) located between adjacent venting columns (932).

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