Spray pipe of polyurethane foam joint mixture aerosol can

Abstract

The utility model is applicable to the technical field of aerosol cans, and provides a spray pipe of a polyurethane foam joint mixture aerosol can, which comprises a connecting pipe and an extension pipe, the extension pipe is mounted on the connecting pipe, pressing pieces are fixedly connected to two opposite side surfaces of the connecting pipe, a sealing head is fixedly mounted at one end, far away from the connecting pipe, of the extension pipe, and the sealing head is fixedly connected with the connecting pipe. A discharging hole communicated with the extension pipe is formed in the sealing head, a shrinkage groove is formed in the inner wall of the discharging hole, a sealing baffle is slidably connected into the shrinkage groove, the other side of the sealing baffle extends into the discharging hole and blocks the discharging hole, and a control shell is fixedly connected to the outer surface of the connecting pipe; according to the device, the polyurethane foam joint mixture in the extension pipe is prevented from making contact with air as much as possible, the extension pipe does not need to be manually sealed, the contact time of the polyurethane foam joint mixture in the extension pipe and the air is shortened, and the softening degree of the polyurethane foam joint mixture in the spray pipe is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol cans, and more specifically to a spray pipe of a polyurethane foam caulking agent aerosol can. Background Art

[0002] The use of polyurethane foam sealant requires a special spray gun or nozzle. If the traditional nozzle is used, if the polyurethane foam sealant cannot be used up at one time, after being stored for a period of time, the polyurethane material remaining in the nozzle will react with water in the air and solidify;

[0003] In order to avoid the above problems, the prior art generally requires manual removal of the sealing rod and installation of the sealing rod at the outlet of the extension tube when the aerosol can is not in use, so as to complete the sealing of the extension tube. However, it takes time to manually remove and install the sealing rod. During the manual operation, the polyurethane foam sealant in the extension tube will come into contact with the air. Even if the sealing rod is installed on the extension tube, some air will remain in the extension tube. In this way, there is still the problem of hardening of the polyurethane foam sealant in the extension tube. At the same time, the staff may forget to install the sealing rod after the operation, which will cause the polyurethane foam sealant in the extension tube to be exposed to the air. The applicant believes that the prior art also has certain disadvantages. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a spray pipe of a polyurethane foam sealant aerosol can which ensures the softening degree of the polyurethane foam sealant in the spray pipe.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The cam is provided with a sealing head at one end of the extension tube away from the connecting tube, and a discharge hole connected to the extension tube is provided on the inner wall of the discharge hole, and a sealing baffle is slidably connected in the contraction groove, and the other side of the sealing baffle extends into the discharge hole and blocks the discharge hole, and the outer surface of the connecting tube is fixedly connected to a control shell, and a gear is provided in the control shell, and the first rack and the second rack are meshed and connected at the opposite sides of the gear respectively, and the upper surface of the first rack is fixedly connected to a pulling wire, and the upper end of the pulling wire slides through the upper surface of the control shell and is laid in contact with the outer surfaces of the connecting tube and the extension tube, and the upper end of the pulling wire slides into the contraction groove and is fixedly connected to the sealing baffle, and the lower surface of the second rack is fixedly connected to a pressure rod, and the lower end of the pressure rod slides through the lower surface of the control shell, and the bottom end of the pressure rod contacts the top surface of the aerosol tank.

[0007] The utility model is further configured as follows: a spring is fixedly connected to one side of the sealing baffle away from the discharge hole, and the other end of the spring is fixedly connected to the inner wall of the contraction groove.

[0008] The utility model is further configured as follows: the outer surface of the sealing baffle is in contact with the inner wall of the shrinkage groove, and a rubber sealing pad is arranged on the outer surface of the sealing baffle.

[0009] The utility model is further configured as follows: a rotating shaft is rotatably connected to the inner wall of the control housing, and a gear is fixedly sleeved on the rotating shaft.

[0010] The utility model is further configured as follows: a guide wheel is provided on the bottom wall of the contraction groove, and a side of the pulling line located in the contraction groove is provided on the outer surface of the guide wheel.

[0011] The utility model is further configured as follows: a plurality of guide rings are fixedly connected to the outer surfaces of the connecting tube and the extension tube, and the guide rings are slidably sleeved on the pulling wire.

[0012] The utility model has the advantages that when the nozzle is pressed, the discharge hole is automatically opened and the polyurethane foam sealant in the extension tube is not blocked; when the nozzle is not pressed, the discharge hole is automatically closed to avoid the polyurethane foam sealant in the extension tube from contacting with the air as much as possible, and there is no need to manually seal the extension tube, thus reducing the contact time between the polyurethane foam sealant in the extension tube and the air, and further ensuring the softening degree of the polyurethane foam sealant in the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the spray pipe structure of a polyurethane foam sealant aerosol can of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the sealing head of the utility model;

[0015] Figure 3 It is a cross-sectional schematic diagram of the control housing of the utility model;

[0016] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0017] In the figure: 1. connecting pipe; 2. extension pipe; 3. sealing head; 4. discharge hole; 5. contraction groove; 6. sealing baffle; 7. spring; 8. pull line; 9. guide wheel; 10. control housing; 11. first rack; 12. rotating shaft; 13. gear; 14. second rack; 15. pressure rod; 16. guide ring; 17. pressing plate. DETAILED DESCRIPTION

[0018] See also Figure 1-4 , the utility model provides the following technical solutions:

[0019] Specifically, it refers to a spray pipe of a polyurethane foam sealant aerosol can, comprising a connecting pipe 1 and an extension pipe 2, wherein the extension pipe 2 is mounted on the connecting pipe 1, and a thread is provided inside the connecting pipe 1. Pressing pieces 17 are fixedly connected to the opposite surfaces of the connecting pipe 1, so that the connecting pipe 1 can be rotatably mounted on the valve of the polyurethane foam sealant aerosol can, the aerosol can is inverted, the extension pipe 2 is aligned with the required filling position, and force is applied to the pressing piece 17 through the fingers, so that the polyurethane foam sealant in the aerosol can is evenly sprayed on the work position.

[0020] Specifically, a sealing head 3 is fixedly installed at one end of the extension tube 2 away from the connecting tube 1, and a discharge hole 4 connected to the extension tube 2 is opened on the sealing head 3, so that the polyurethane foam filler in the extension tube 2 can be discharged through the discharge hole 4, and a contraction groove 5 is opened on the inner wall of the discharge hole 4, and a sealing baffle 6 is slidably connected in the contraction groove 5, and the outer surface of the sealing baffle 6 is in contact with the inner wall of the contraction groove 5, and the other side extends into the discharge hole 4, and the outer surface of the sealing baffle 6 on one side of the discharge hole 4 is in contact with the inner wall of the discharge hole 4 and blocks the discharge hole 4, so that the polyurethane foam filler in the extension tube 2 can be sealed, the problem of hardening of the polyurethane foam filler when in contact with the external air can be avoided, the problem of clogging of the extension tube 2 is prevented, and the use effect of the nozzle is guaranteed.

[0021] Specifically, a spring 7 is fixedly connected to the side of the sealing baffle 6 away from the discharge hole 4, and the other end of the spring 7 is fixedly connected to the inner wall of the contraction groove 5. When the spring 7 is not squeezed, the spring 7 will exert a thrust on the sealing baffle 6, so that the initial position of the sealing baffle 6 is to seal the discharge hole 4. At the same time, a rubber sealing pad is provided on the outer surface of the sealing baffle 6, which can increase the sealing between the sealing baffle 6 and the inner wall of the contraction groove 5 and the inner wall of the discharge hole 4, and minimize the situation where external air enters the extension tube 2.

[0022] Specifically, the outer surface of the connecting tube 1 is fixedly connected to the control shell 10, and the inner wall of the control shell 10 is rotatably connected to a rotating shaft 12, and a gear 13 is fixedly sleeved on the rotating shaft 12. The first rack 11 and the second rack 14 are respectively meshed and connected on opposite sides of the gear 13, and the lower surface of the second rack 14 is fixedly connected to a pressure rod 15, and the lower end of the pressure rod 15 slides through the lower surface of the control shell 10. When the connecting tube 1 is installed on the valve of the aerosol can, the bottom end of the pressure rod 15 contacts the top surface of the aerosol can, so that when the pressing piece 17 is pressed, the pressure rod 15 will push the second rack 14 to move upward, thereby meshing and driving the gear 13 to rotate counterclockwise, and at the same time the first rack 11 moves downward.

[0023] Specifically, a pulling wire 8 is fixedly connected to the upper surface of the first rack 11, and the upper end of the pulling wire 8 slides through the upper surface of the control housing 10 and is laid in contact with the outer surfaces of the connecting tube 1 and the extension tube 2. The upper end of the pulling wire 8 slides through the contraction groove 5 and is fixedly connected to the sealing baffle 6. When the first rack 11 descends, the pulling wire 8 can be pulled, so that the pulling wire 8 can form a pulling force on the sealing baffle 6, pulling the sealing baffle 6 into the contraction groove 5. At the same time, the spring 7 is contracted by force. When the staff does not apply pressure to the pressing piece 17, the nozzle will move upward under the push of the valve of the aerosol can. In this way, the second rack 14 cannot limit the gear 13, so that the sealing baffle 6 is moved to the initial position under the push of the spring 7, and blocks the discharge hole 4 again. The above structure can automatically open the discharge hole 4 when the nozzle is pressed, and the polyurethane foam filler in the extension tube 2 is not blocked. When the nozzle is not pressed, the discharge hole 4 is automatically closed to avoid the polyurethane foam filler in the extension tube 2 from contacting with the air as much as possible. There is no need to manually seal the extension tube 2, which reduces the contact time between the polyurethane foam filler in the extension tube 2 and the air, and further ensures the softening degree of the polyurethane foam filler in the nozzle.

[0024] In the present embodiment, the extension tube 2 is made of hard plastic, which ensures the hardness of the extension tube 2 and avoids the problem of bending of the extension tube 2 when the pulling wire 8 pulls the sealing baffle 6, thereby affecting the normal use of the extension tube 2.

[0025] Specifically, a guide wheel 9 is provided on the bottom wall of the shrinkage groove 5, and a pulling wire 8 is arranged on the outer surface of the guide wheel 9 on one side of the shrinkage groove 5. This can avoid friction between the pulling wire 8 and the bottom wall of the shrinkage groove 5, or even breakage, thereby further ensuring the service life of the pulling wire 8.

[0026] Specifically, a plurality of guide rings 16 are fixedly connected to the outer surfaces of the connecting tube 1 and the extension tube 2, and the guide rings 16 are slidably mounted on the pulling wire 8, so that the guide rings 16 can limit the pulling wire 8 and avoid the shaking of the pulling wire 8 as much as possible.

[0027] The working principle of the nozzle of the polyurethane foam sealant aerosol can provided by the utility model is as follows: when the connecting pipe 1 is installed on the valve of the aerosol can, the bottom end of the pressure rod 15 contacts the top surface of the aerosol can, so that when the pressing plate 17 is pressed, the pressure rod 15 will push the second rack 14 to move upward, thereby meshing and driving the gear 13 to rotate counterclockwise, and at the same time the first rack 11 moves downward and pulls the pulling line 8, so that the pulling line 8 can form a pulling force on the sealing baffle 6, and pull the sealing baffle 6 into the shrinkage groove 5, and at the same time the spring 7 is forced to shrink, when the staff does not apply pressure to the pressing plate 17, the nozzle will move upward under the push of the valve of the aerosol can, so that the second rack 14 cannot limit the gear 13, so that the sealing baffle 6 is moved to the initial position under the push of the spring 7, and the discharge hole 4 is blocked again.

Claims

1. A spray pipe for a polyurethane foam sealant aerosol can, comprising a connecting pipe (1) and an extension pipe (2), wherein the extension pipe (2) is mounted on the connecting pipe (1), and pressing pieces (17) are fixedly connected to opposite sides of the connecting pipe (1), characterized in that: A sealing head (3) is fixedly mounted on one end of the extension tube (2) away from the connecting tube (1); a discharge hole (4) communicating with the extension tube (2) is provided on the sealing head (3); a contraction groove (5) is provided on the inner wall of the discharge hole (4); a sealing baffle (6) is slidably connected in the contraction groove (5); the other side of the sealing baffle (6) extends into the discharge hole (4) and blocks the discharge hole (4); a control housing (10) is fixedly connected to the outer surface of the connecting tube (1); a gear (13) is provided in the control housing (10); and first racks are respectively meshed and connected on opposite sides of the gear (13). (11) and the second rack (14), the upper surface of the first rack (11) is fixedly connected with a pulling wire (8), the upper end of the pulling wire (8) slides through the upper surface of the control housing (10), and is laid in close contact with the outer surface of the connecting pipe (1) and the extension pipe (2), the upper end of the pulling wire (8) slides into the shrinkage groove (5), and is fixedly connected with the sealing baffle (6), the lower surface of the second rack (14) is fixedly connected with a pressing rod (15), the lower end of the pressing rod (15) slides through the lower surface of the control housing (10), and the bottom end of the pressing rod (15) contacts the top surface of the aerosol can.

2. The nozzle of the polyurethane foam sealant aerosol can according to claim 1, characterized in that: A spring (7) is fixedly connected to one side of the sealing baffle (6) away from the discharge hole (4), and the other end of the spring (7) is fixedly connected to the inner wall of the contraction groove (5).

3. The nozzle of the polyurethane foam sealant aerosol can according to claim 1, characterized in that: The outer surface of the sealing baffle (6) is in contact with the inner wall of the shrinkage groove (5), and a rubber sealing pad is provided on the outer surface of the sealing baffle (6).

4. The nozzle of the polyurethane foam sealant aerosol can according to claim 1, characterized in that: A rotating shaft (12) is rotatably connected to the inner wall of the control housing (10), and a gear (13) is fixedly sleeved on the rotating shaft (12).

5. The nozzle of the polyurethane foam sealant aerosol can according to claim 1, characterized in that: A guide wheel (9) is provided on the bottom wall of the contraction groove (5), and a side of the pulling wire (8) located in the contraction groove (5) is provided on the outer surface of the guide wheel (9).

6. The nozzle of the polyurethane foam sealant aerosol can according to claim 1, characterized in that: A plurality of guide rings (16) are fixedly connected to the outer surfaces of the connecting tube (1) and the extension tube (2), and the guide rings (16) are slidably sleeved on the pulling wire (8).

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