WO2010078817A1

WO2010078817A1 - Foam gun with flow regulating device

Info

Publication number: WO2010078817A1
Application number: PCT/CN2009/076203
Authority: WO
Inventors: 郑英
Original assignee: Zheng Ying
Priority date: 2009-01-06
Filing date: 2009-12-29
Publication date: 2010-07-15
Also published as: CN101767073B; RU2488451C2; RU2011126091A; CN101767073A

Abstract

A foam gun with a flow regulating device includes a gun body (5), a gun barrel (2) connected to the gun body (5), a needle bar (3) axially provided in the gun barrel (2) and a trigger (12) hinged to the gun body (5), the trigger (12) is connected with the needle bar (3); said flow regulating device is set on the gun body (5) and includes a compression spring (9), one end of the compression spring (9) acts on the gun body (5), and the other end acts on the needle bar (3); a positioning sleeve (11) is provided in the gun body (5) and used for limiting the axial sliding distance of the needle bar (3) in the gun body (5), a screw sleeve (7) is screwed on an outer circumferential surface of the positioning sleeve (11), on the gun body (5) is provided a through gap (6), in which the screw sleeve (7) is located with a clearance; the screw sleeve (7) can rotate on the gun body (5) and is fixed relative to the gun body (5) in the axial direction, and the positioning sleeve (11) can slide in the gun body (5) in the axial direction and is fixed relative to the gun body (5) in the circumferential direction. The rotation of the screw sleeve (7) makes the positioning sleeve (11) slide in the gun body (5) axially to limit the axial sliding distance of the needle bar (3), thereby the flow of the foam liquid is regulated.

Description

Instruction manual

Foam gun with flow regulating device

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a spray gun for ejecting a liquid, and more particularly to a foam gun with a flow regulating device. Background technique

In the decoration of the building, it is sometimes necessary to block the gap between the plates. The foaming liquid is such a caulking agent. After the foaming liquid is applied to the gap between the plates to be solidified, the foaming liquid can be sealed. The gap. The foaming liquid is always stored in a closed liquid storage tank before being sprayed, and it is necessary to use a foaming gun when spraying. The structure of the foaming gun comprises a gun body, a barrel, a needle bar and a wrench. The barrel is threaded on the gun body, and the needle bar is arranged in the barrel and has one end extending outside the barrel and a wrench hinged on the gun body. Join. In order to adjust the flow rate of the foaming liquid, a flow regulating device for the foaming liquid is further provided on the gun body, and the flow regulating device can define the maximum axial sliding distance of the needle bar in the barrel each time the wrench is pulled. Early flow regulating devices included adjustment knobs threaded onto the gun body, the inner end of the adjustment knob being in contact with one end of the spring, and the other end of the spring being coupled to the end of the needle shaft. By adjusting the pre-compression of the spring by turning the adjustment knob, the maximum distance for the axial movement of the needle bar is adjusted. When the adjustment knob is rotated, the friction between the adjustment knob and the spring makes the adjustment knob seem to be very difficult, and when adjusting, the operator needs two hands to perform the adjustment operation together, which is inconvenient.

In the Chinese invention patent No. 200620105928. 7 discloses a flow regulating device for a foaming liquid, the structure of which comprises an adjusting screw extending outside the gun body, a compression spring sleeve On the needle bar, and in the barrel, one end of the spring acts on the needle bar, and the other end acts on the gun body. One end of the needle bar protrudes from the outside of the gun body and is coupled to the wrench, and the needle body is along the needle bar. a sliding cavity is arranged in the axial direction, and a sliding adjusting screw is arranged in the sliding cavity. One end of the adjusting screw is screwed on the adjusting screw, and the other end is fixed in the circumferential direction relative to the sliding cavity, and the adjusting screw can be rotated, and is opposite to the gun. The body is axially fixed. Although the adjusting device of such a structure is labor-saving in performing the adjusting operation, it is necessary for the operator to perform adjustment with both hands, and the inconvenience of the adjusting operation is obvious. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a foaming gun with a flow regulating device which is easy to adjust when adjusting the flow rate of a foaming liquid.

In order to achieve the object, the technical measures adopted by the present invention: a foaming gun with a flow regulating device, comprising a gun body and a barrel connected to the gun body, and a needle bar is arranged axially in the barrel, on the gun body The wrench is coupled to the needle bar, and the flow regulating device is disposed on the gun body, and comprises a compression spring, one end of the spring acts on the gun body, and the other end acts on the needle bar, the gun a positioning sleeve is disposed in the body, the positioning sleeve is used to define a distance for the needle rod to slide axially in the gun body, a screw sleeve is threaded on the outer circumferential surface of the positioning sleeve, and a through hole is formed in the gun body, and the screw is provided The sleeve is located in the gap, the threaded sleeve is rotatable on the gun body and axially fixed relative to the gun body, and the positioning sleeve is axially slidable within the gun body and fixed circumferentially relative to the gun body. The end of the needle bar is fluidly sealed from the inner surface of the nozzle provided at the end of the barrel. When the wrench is pulled, the wrench drives the needle bar to slide axially in the barrel, and the end of the needle bar is separated from the inner surface of the nozzle. In contact, the foaming liquid is ejected from the nozzle to achieve coating of the gap of the sheet. The positioning sleeve is blocked on the sliding line of the needle bar, and the positioning sleeve and the needle bar have a contactable limit structure for performing the distance of the needle bar for each sliding. The gap is defined to further define a gap between the end of the needle bar and the inner surface of the nozzle to achieve the purpose of adjusting the flow rate of the foaming liquid. The sleeve gap is disposed in the transparent notch, so that the outer peripheral surface portion of the screw sleeve faces the outer side of the gun body, and the foam gun operator holds the gunner's thumb directly to fit the outer peripheral surface of the screw sleeve to dial the screw sleeve The transparent gap also allows the screw sleeve to be axially fixed on the gun body. The operator can rotate the screw sleeve with the thumb of the gunner to rotate the screw sleeve according to the size of the gap to be applied, and the cylinder sleeve can be fixed in the circumferential direction relative to the gun body during the rotation of the screw sleeve fixed with respect to the axial direction of the gun body. The positioning sleeve is axially slid, so that the relative position between the positioning sleeve and the needle bar can be changed, so as to achieve the purpose of adjusting the flow rate of the foaming liquid.

In the foaming gun, the positioning sleeve is hollow, and the spring passes through the positioning sleeve with a gap. This makes the flow regulating device compact and facilitates the placement of the flow regulating device within the gun body.

In the foaming gun, the end of the positioning sleeve is provided with a prism-shaped positioning head, and a prism-shaped sliding cavity that is matched with the positioning head is provided in the gun body, and the positioning head is sleeved at the same time. On the spring; the screw sleeve is cylindrical, and the positioning sleeve is cylindrical. The prismatic structure is matched between the positioning head and the sliding cavity, and the two sides are in contact with each other, and the positioning sleeve slides smoothly in the sliding cavity.

In the foaming gun, the outer peripheral surface portion of the nut protrudes to the outer side of the main surface of the gun body. The outer peripheral surface of the nut protrudes to the outer side of the main surface of the gun body, the main surface refers to the largest outer surface of the three-dimensional configuration of the gun body, and the outer peripheral surface portion of the screw sleeve protrudes to the outer side of the main surface of the gun body, facilitating the operator to hold the gun The thumb of the hand touches the threaded sleeve.

In the foaming gun, the notch corresponds to the position of the handle on the gun body. The term "corresponding" means that the threaded sleeve in the gap is located within the range accessible to the operator's thumb. The "corresponding" narrow sense can also be understood as the natural extension of the gap in the length of the handle. In the foaming gun, the outer peripheral surface of the screw sleeve is provided with a knurling structure. The purpose of the knurled structure is to increase the roughness of the outer peripheral surface of the nut, which facilitates the rotation of the thumb against the nut.

In the foaming gun, an annular rubber layer is disposed on the outer circumferential surface of the screw sleeve, and the knurling structure is located on both sides of the rubber layer. The purpose of the rubber layer is to have a decorative effect and to improve the contact comfort between the thumb and the sleeve.

In the foaming gun, a plurality of protruding ribs are obliquely disposed on an outer circumferential surface of the screw sleeve, and the middle portions of the ribs are bent to form an annular curved shape at a central portion of the outer circumferential surface of the screw sleeve. Depression. The depression is annular, which means that the depression extends along the entire outer circumferential surface of the nut sleeve, and the depression is curved, which means that the depression has an arc shape along the axial direction of the screw sleeve, and the depression can be attached to the thumb portion of the human hand. Fully fits, adapts to the shape of the thumb, and facilitates the force of the thumb on the screw sleeve.

In the foaming gun, the diameter of the screw sleeve is larger than the thickness of the gun body, and the outer peripheral surfaces of the two portions on the screw sleeve respectively protrude from both sides of the main surface of the gun body, and the two protruding portions are equal in size. The two protruding portions are equal in size, and the screw sleeve is symmetrically disposed on the gun body, so that the operator who is used by the hand can rotate the screw sleeve.

In the foaming gun, the diameter of the threaded sleeve is 1.1 times the thickness of the gun body. Such a limitation ensures that the outer peripheral surface of the screw sleeve can protrude outside the gun body, and that the screw sleeve is not excessively large, which affects the overall appearance of the foam body. The invention has the following beneficial effects:

The screw sleeve is disposed in the gap formed in the gun body, and the screw sleeve is not subjected to the friction force of the spring. The screw sleeve is labor-saving during the rotation process, and the single thumb of the human hand can be used to move the screw sleeve, and the gun holder can be utilized. The thumb is in contact with the outer peripheral surface of the sleeve, and the sleeve is rotated to change the positioning sleeve in the gun body The axial position makes it easy to limit the distance that the needle bar slides axially in the barrel to achieve the purpose of real-time adjustment of the flow rate of the foaming liquid. It is not necessary for the operator to adjust the flow rate of the foaming liquid with both hands. Convenience. In the case where the flow rate of the foaming liquid can be conveniently adjusted in time, it is advantageous to ensure the quality of the gap coating, and it is also difficult to waste the foaming liquid due to the excessive flow rate of the foaming liquid. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a longitudinal cross-sectional view of a foaming gun with a foaming liquid flow regulating device.

2 is a schematic enlarged view showing the coupling of the screw sleeve and the positioning sleeve in the foaming gun.

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

Figure 4 is a partial longitudinal cross-sectional view showing another embodiment of the foaming gun. detailed description

A specific embodiment of the foaming gun of the present invention with a foaming liquid flow regulating device is shown in Figs. 1, 2 and 3.

The structure of the foaming gun of the present invention comprises a gun body 5, a barrel 2, a needle bar 3, a wrench 12, the barrel 2 is screwed onto the gun body 5, and the needle bar 3 is axially disposed in the barrel 2, the barrel 2 The front end portion is connected with a nozzle 1 , and the front end portion of the needle bar 3 is liquid-tight when pressed against the inner surface of the nozzle 1 , and the rear end portion of the needle bar 3 protrudes to the outside of the barrel 2 , and the wrench 12 is hinged at On the gun body 5, the rear end portion of the needle bar 3 is coupled to the wrench 12. When the wrench 12 is pulled, the wrench 12 causes the needle bar 3 to slide axially within the barrel 2. An adapter 4 is also provided on the gun body 5, and the adapter 4 is connected to a reservoir for storing the foaming liquid, and the adapter 4 communicates with the inside of the barrel 2.

The gun body 5 is provided with a foaming liquid flow regulating device, and the structure thereof comprises a compression spring 9 in the gun body 5 is provided at the position of the barrel 2 at the position of the sliding chamber 13 arranged along the axial direction of the barrel 2, the outer end of the sliding chamber 13 facing the outer side of the gun body 5, and the inner end facing the needle bar 3. The outer port portion of the sliding chamber 13 is provided with a fixing nut 8, and the spring 9 is located in the sliding chamber 13. The outer end of the spring 9 is pressed against the fixing nut 8, and the inner end is connected to the rear end of the needle bar 3. A cylindrical positioning sleeve 11 is also disposed in the sliding chamber 13. The positioning sleeve 11 is sleeved on the spring 9 in a gap, the positioning sleeve 11 is circumferentially fixed relative to the sliding chamber 13, and the positioning sleeve 11 is in the sliding chamber 13. Axial sliding. A cylindrical screw sleeve 7 is screwed to the outer circumference of the positioning sleeve 11, and the threaded sleeve 7 is axially fixed with respect to the gun body 5, and the threaded sleeve 7 is rotatable circumferentially on the gun body 5.

The positioning sleeve 11 and the sliding cavity 13 may be a non-circular fitting, or a fitting structure of the convex body and the groove, or a prismatic positioning head 15 may be connected to the end of the positioning sleeve 11. When the positioning portion 15 is provided at the end of the positioning sleeve 11, the sliding cavity 13 is also in the shape of a prism corresponding to the structure of the positioning head 15, and the positioning head 15 is hollow, and the spring 9 passes through the positioning head 15 . At the position of the sliding body 13 on the gun body 5, a notch 6 is formed which penetrates the thickness of the gun body 5, and the nut sleeve 7 is gap-fitted in the notch 6. The position of the notch 6 on the gun body 5 is such that the operator can easily rotate the screw sleeve 7 with the gunner's thumb. The position of the notch 6 on the gun body 5 is generally at the natural extension of the length of the handle 10 on the gun body 5. The diameter of the screw sleeve 7 is larger than the thickness of the gun body 5. Normally, the diameter of the screw sleeve 7 is 1.1 2 times the thickness of the gun body 5. After the nut 7 is placed in the notch 6, a portion of the outer peripheral surface of the nut 7 protrudes to the outside of the main surface of the gun body 5. The threaded sleeve 7 is generally symmetrically disposed on the gun body 5, that is, when the threaded sleeve 7 is located on the gun body 5, the outer peripheral surfaces of the two portions of the threaded sleeve 7 projecting to the outside of the two main surfaces of the gun body 5 respectively, and the screw The two protruding portions on the sleeve 7 are equal in size.

The needle bar 3, the spring 9, the positioning sleeve 11, and the screw sleeve 7 are coaxially disposed. The positioning sleeve 11 is used to define the maximum sliding distance of the needle bar 3 in the barrel 2, and the positioning sleeve 11 and the needle bar 3 are provided with a limiting structure that can contact each other. In the figure, the rear end of the needle bar 3 is provided with a large diameter In the convex body 16 of the inner diameter of the positioning sleeve 11, when the convex body 16 is moved to the front end position of the positioning sleeve 11, the end surface of the convex body 16 is engaged with the front end surface of the positioning sleeve 11, and the positioning sleeve 11 is blocked. The needle bar 3 is further slid in the direction of the positioning sleeve 11.

A knurling structure is provided on the outer peripheral surface of the screw sleeve 7 to increase the roughness of the outer peripheral surface of the nut sleeve 7. Further, an annular rubber layer 14 is provided at an intermediate position of the outer peripheral surface of the nut sleeve 7, and the knurled structure is located on both sides of the rubber layer 14.

The outer peripheral surface of the nut sleeve 7 may be provided with a concavo-convex structure formed by a plurality of protruding strip-shaped ridges 17 provided on the outer peripheral surface of the nut sleeve 7, the concavo-convex structure including the A groove formed between the ridge 17 and the adjacent two ribs 17. The strip-shaped ribs 17 are arranged side by side on the outer peripheral surface of the screw sleeve 7. The ribs 17 and the axis of the threaded sleeve 7 have an angle therebetween, and the two ends of the strip 17 start from the two of the threaded sleeves 7, respectively. On the end side, this adapts to the direction of the force applied by the gunner's thumb to the threaded sleeve 7, which facilitates the toggle of the thumb against the threaded sleeve 7.

The outer peripheral surface of the nut sleeve 7 has a recess 18 which is formed by bending a central portion of the rib 17 which is annular and extends circumferentially along the entire outer peripheral surface of the nut 7. The recess 18 is located at the axial center position of the nut sleeve 7, and the recess 18 has an arcuate cross section along the axis of the screw sleeve 7. The recess 18 facilitates engagement with the thumb, improving the comfort of the thumb when the threaded sleeve 7 is swung.

Claims

Claim

1. A foaming gun with a flow regulating device, comprising a gun body (5) and a barrel (2) attached to the gun body (5), and a needle bar is arranged axially in the barrel (2) 3), the gun body (5) is hinged with a wrench (12), the wrench (12) is coupled with the needle bar (3), and the flow regulating device is disposed on the gun body (5), including a compression spring (9) ), one end of the spring (9) acts on the gun body (5), and the other end acts on the needle bar (3), characterized in that the gun body (5) is provided with a positioning sleeve

(11), the positioning sleeve (11) is used to limit the distance that the needle bar (3) slides axially in the gun body (5), and a threaded sleeve (7) is screwed on the outer circumferential surface of the positioning sleeve (11). A through hole (6) is formed in the gun body (5), the screw sleeve (7) is located in the gap (6), and the screw sleeve (7) is rotatable on the gun body (5) The positioning sleeve (11) is axially slidable within the gun body (5) and fixed circumferentially relative to the gun body (5) with respect to the axial fixation of the gun body (5).

2. Foaming gun according to claim 1, characterized in that the positioning sleeve (11) is hollow and the spring (9) passes through the positioning sleeve (11) with a gap.

The foaming gun according to claim 2, wherein the end of the positioning sleeve (11) is provided with a prismatic positioning head (15), which is disposed in the gun body (5) Head (15) a clearance-fit prismatic slide chamber (13), the positioning head (15) is sleeved at the same time in the spring

(9) Upper; the threaded sleeve (7) is cylindrical, and the positioning sleeve (11) is cylindrical.

The foaming gun according to claim 1, 2 or 3, characterized in that the outer peripheral surface portion of the screw sleeve (7) protrudes to the outside of the main surface of the gun body (5).

5. A foaming gun according to claim 1, 2 or 3, characterized in that the notch (6) corresponds to the position of the handle (10) on the gun body (5).

The foaming gun according to claim 1, 2 or 3, characterized in that the outer peripheral surface of the screw sleeve (7) is provided with a knurling structure.

The foaming gun according to claim 6, wherein an outer annular surface of the screw sleeve (7) is provided with an annular rubber layer (14), and the knurling structure is located on the rubber layer (14). On both sides.

The foaming gun according to claim 1, 2 or 3, characterized in that the outer peripheral surface of the screw sleeve (7) is obliquely provided with a plurality of protruding ribs (17), and the ribs (17) The middle portion is curved so that an annular arcuate depression is formed at a central portion of the outer circumferential surface of the screw sleeve (7) (18).

The foaming gun according to claim 4, wherein the screw sleeve (7) has a diameter larger than the thickness of the gun body (5), and the outer peripheral surfaces of the two portions of the screw sleeve (7) respectively protrude the gun body (5) Both sides of the main surface, and the two protruding portions are equal in size.

10. A foaming gun according to claim 9, characterized in that the diameter of the threaded sleeve (7) is 1.1 times the thickness of the gun body (5).