Leakage-proof device for high-cohesiveness polyurethane foam joint mixture

Abstract

The utility model relates to a high cohesiveness polyurethane foam joint mixture anti-leakage device which comprises an aerosol tank, a valve pipe is installed on the top of the aerosol tank, a butt joint ring is fixedly arranged on the outer surface of the valve pipe in a sleeved mode, a contraction cavity is formed in the butt joint ring, a limiting rod is arranged in the contraction cavity, and the lower end of the limiting rod penetrates out of the lower surface of the butt joint ring in a sliding mode. The limiting rod is arranged in the butt joint ring and makes contact with the top of the aerosol tank, the end, located in the contraction cavity, of the limiting rod is fixedly connected with a first limiting plate, a control cavity is formed in the butt joint ring, a limiting sliding rod is arranged in the control cavity, and one end of the limiting sliding rod penetrates into the contraction cavity in a sliding mode. Therefore, the problem that the polyurethane foam joint mixture in the aerosol tank is not leaked is prevented, the loss condition is reduced, after the spray pipe is installed, limitation on the valve pipe is automatically relieved, manual operation is not needed, and a good using effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol cans, and more specifically to a high-adhesion polyurethane foam sealant anti-leakage device. Background Art

[0002] Polyurethane foam sealant is a special polyurethane product that is made by loading polyurethane prepolymer, foaming agent, catalyst and other components into a pressure-resistant aerosol can. During construction, the aerosol colloid is sprayed to the construction site through a matching glue gun or manual nozzle. The polyurethane material foams and expands rapidly and reacts with moisture in the air or on the substrate to form foam, and completes the molding, foaming, bonding and sealing processes in a relatively short time.

[0003] At present, the existing polyurethane foam sealant is generally filled in an aerosol can. When in use, the nozzle is generally installed on the valve tube of the aerosol can. By pressing the valve stem, the polyurethane foam sealant in the aerosol can can be sprayed out. During the construction process, it is generally impossible to use up all the polyurethane foam sealant in the aerosol can, so the aerosol can is stored. At the same time, in order to prevent the foam sealant in the nozzle from solidifying during storage, the nozzle is generally removed and cleaned, which will cause the valve tube of the aerosol can to be exposed. Therefore, the aerosol can will inevitably touch or squeeze the valve tube by mistake during storage, and the polyurethane foam sealant in the aerosol can will leak through the valve tube, which will cause the polyurethane foam sealant to be wasted or even cause harm to personnel. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model aims to provide a high-adhesion polyurethane foam sealant anti-leakage device which prevents the polyurethane foam sealant in an aerosol can from leaking.

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

[0006] A high-adhesion polyurethane foam sealant leakage prevention device comprises an aerosol can, a valve tube is installed on the top of the aerosol can, the outer surface of the valve tube is fixedly sleeved with a docking ring, a contraction cavity is opened in the docking ring, a limiting rod is arranged in the contraction cavity, the lower end of the limiting rod slides through the lower surface of the docking ring and contacts with the top of the aerosol can, one end of the limiting rod located in the contraction cavity is fixedly connected with a first limiting plate, a control cavity is opened in the docking ring, a limiting slide rod is arranged in the control cavity, one end of the limiting slide rod slides through the contraction cavity, a slot adapted for the limiting slide rod is opened on the side surface of the first limiting plate facing the limiting slide rod, one end of the limiting slide rod located in the control cavity is fixedly connected with an extrusion block, the extrusion block is in the shape of a right-angled trapezoid, a trigger pressure rod is arranged on the docking ring, the lower end of the trigger pressure rod slides through the control cavity and contacts with the inclined surface of the extrusion block.

[0007] The utility model is further configured as follows: a threaded head is fixedly installed on the top of the valve pipe, a discharge hole communicating with the interior of the valve pipe is opened on the threaded head, and a docking ring is located at the lower side of the threaded head.

[0008] The utility model is further configured as follows: the first limiting plate is in the shape of a combination of a truncated cone and a cylinder, the small circle at the bottom of the first limiting plate is consistent with the outer surface of the limiting rod, and the first limiting plate slides in the contraction cavity.

[0009] The utility model is further configured as follows: a first spring is fixedly connected between the upper surface of the first limiting plate and the top wall of the contraction cavity.

[0010] The utility model is further configured as follows: the extrusion block is slidably connected to the bottom wall of the control cavity, and a second spring is fixedly connected between the other side of the extrusion block and the inner wall of the control cavity.

[0011] The utility model is further configured as follows: a second limiting plate is fixedly sleeved on the outer surface of one end of the trigger pressure rod located in the control cavity.

[0012] The utility model has the advantages that the valve tube can be automatically restricted when the aerosol can is not in use, so that the valve tube cannot be displaced when the aerosol can is squeezed or touched by mistake during placement, thereby preventing the polyurethane foam sealant in the aerosol can from leaking and reducing losses. When the spray pipe is installed, the restriction on the valve tube is automatically released without manual operation, and has a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a high-adhesive polyurethane foam sealant anti-leakage device of the utility model;

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle;

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

[0016] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0017] In the figure: 1, aerosol can; 2, valve tube; 3, threaded head; 4, discharge hole; 5, docking ring; 6, limiting rod; 7, contraction chamber; 8, first limiting plate; 9, first spring; 10, control chamber; 11, limiting slide rod; 12, extrusion block; 13, second spring; 14, trigger pressure rod; 15, second limiting plate. DETAILED DESCRIPTION

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

[0019] Specifically, it refers to a high-adhesion polyurethane foam sealant leakage prevention device, comprising an aerosol can 1, a valve tube 2 is installed on the top of the aerosol can 1, a threaded head 3 is fixedly installed on the top of the valve tube 2, and a discharge hole 4 connected with the inside of the valve tube 2 is opened on the threaded head 3. Therefore, when the aerosol can 1 needs to be used, the polyurethane foam sealant is shaken up and down for one minute to ensure that the material liquid in the aerosol can 1 is evenly mixed, and then a small amount of water is sprinkled in the construction gap or cavity, and then the nozzle is rotated and screwed on the threaded head 3, and the pressing piece of the nozzle is pressed by the finger, and the valve tube 2 moves downward at the same time, so that the polyurethane foam sealant in the aerosol can 1 is sprayed from the nozzle to the construction site.

[0020] Specifically, a docking ring 5 is fixedly sleeved on the outer surface of the valve tube 2, and the docking ring 5 is located at the lower side of the threaded head 3. A contraction cavity 7 is opened in the docking ring 5, and a limiting rod 6 is provided in the contraction cavity 7. The lower end of the limiting rod 6 slides through the lower surface of the docking ring 5 and contacts with the top of the aerosol tank 1. One end of the limiting rod 6 located in the contraction cavity 7 is fixedly connected with a first limiting plate 8. The first limiting plate 8 is a combination of a truncated cone and a cylinder. The small circle at the bottom of the first limiting plate 8 is consistent with the outer surface of the limiting rod 6. The first limiting plate 8 slides in the contraction cavity 7, and the upper surface of the first limiting plate 8 is in contact with the contraction cavity 7. A first spring 9 is fixedly connected between the top walls. When the first spring 9 is not squeezed, the first spring 9 will exert a thrust on the first limiting plate 8, so that the lower end of the limiting rod 6 is completely located outside the docking ring 5. When the valve tube 2 is pressed, the bottom of the limiting rod 6 is restricted by the aerosol can 1, so that the top of the limiting rod 6 is displaced into the contraction chamber 7. At the same time, the first limiting plate 8 squeezes the first spring 9, so that the first spring 9 contracts. When the valve tube 2 returns to its initial position, the first spring 9 loses its restriction and synchronously pushes the first limiting plate 8 and the limiting rod 6 to move to their initial positions.

[0021] Specifically, a control chamber 10 is provided in the docking ring 5, and a limiting slide bar 11 is provided in the control chamber 10. One end of the limiting slide bar 11 slides through the contraction chamber 7, and at the same time, a groove adapted to the limiting slide bar 11 is provided on the surface of the first limiting plate 8 facing the limiting slide bar 11. When the limiting slide bar 11 moves into the groove, the limiting slide bar 11 will have a limiting effect on the first limiting plate 8, so that the limiting rod 6 cannot move upward, and the valve tube 2 cannot move downward. When the aerosol can 1 is not in use and the nozzle is removed, the valve tube 2 is prevented from being squeezed or accidentally touched during the placement of the aerosol can 1, thereby preventing the polyurethane foam filler in the aerosol can 1 from leaking, further ensuring the stability of the aerosol can 1 when it is placed.

[0022] Specifically, one end of the limiting slide bar 11 located in the control chamber 10 is fixedly connected to an extrusion block 12, and the extrusion block 12 is in the shape of a right-angled trapezoid. The extrusion block 12 is slidably connected to the bottom wall of the control chamber 10, and a second spring 13 is fixedly connected between the other side of the extrusion block 12 and the inner wall of the control chamber 10. When the second spring 13 is not squeezed, the second spring 13 will form a thrust on the extrusion block 12, so that the initial position of the limiting slide bar 11 is that one end is located in the contraction chamber 7.

[0023] Specifically, a trigger pressure rod 14 is provided on the docking ring 5, and the lower end of the trigger pressure rod 14 slides through the control chamber 10 and contacts the inclined surface of the extrusion block 12, and the upper end of the trigger pressure rod 14 contacts the bottom of the nozzle. When the nozzle is installed on the threaded head 3, the bottom of the nozzle will squeeze the trigger pressure rod 14, so that the trigger pressure rod 14 moves downward, and at the same time, the trigger pressure rod 14 squeezes the inclined surface of the extrusion block 12, so that the extrusion block 12 moves to the side away from the contraction chamber 7, and at the same time, the second spring 13 is forced to shrink, so that the limiting slide rod 11 moves out of the slot and no longer restricts the limiting rod 6. Therefore, when the polyurethane foam sealant in the aerosol can 1 needs to be sprayed out, the limiting rod 6 will not limit the valve tube 2. When the aerosol can 1 is not needed and the nozzle is removed, the nozzle no longer squeezes the trigger pressure rod 14, so that the second spring 13 pushes the squeezing block 12 to move to the initial position, so that the limiting slide bar 11 can move into the slot to complete the restriction of the limiting rod 6. The above structure can automatically restrict the valve tube 2 when the aerosol can 1 is not in use, and automatically release the restriction on the valve tube 2 when the nozzle is installed, without manual operation, and has a better use effect.

[0024] Specifically, a second limiting plate 15 is fixedly sleeved on the outer surface of one end of the trigger rod 14 located in the control cavity 10 , which is used to limit the displacement of the trigger rod 14 out of the control cavity 10 and prevent the trigger rod 14 from falling off.

[0025] The working principle of the high-adhesive polyurethane foam sealant anti-leakage device provided by the utility model is as follows: when the nozzle is installed on the threaded head 3, the bottom of the nozzle will squeeze the trigger pressure rod 14, so that the trigger pressure rod 14 moves downward, and at the same time, the trigger pressure rod 14 squeezes the inclined surface of the extrusion block 12, so that the extrusion block 12 moves to the side away from the contraction cavity 7, and at the same time, the second spring 13 is forced to shrink, so that the sliding rod 11 is restricted from moving out of the slot and no longer restricts the restriction rod 6. Therefore, when the polyurethane foam sealant in the aerosol can 1 needs to be used to spray, the restriction rod 6 will not restrict the valve tube 2;

[0026] When the aerosol can 1 is no longer needed and the nozzle is removed, the nozzle no longer presses the trigger pressure rod 14, so that the second spring 13 pushes the squeezing block 12 to move to the initial position, so that the limiting slide bar 11 can move into the slot to complete the restriction of the limiting rod 6.

Claims

1. A highly adhesive polyurethane foam sealant anti-leakage device, comprising an aerosol can (1), a valve tube (2) being installed on the top of the aerosol can (1), characterized in that: The outer surface of the valve tube (2) is fixedly sleeved with a docking ring (5), a contraction cavity (7) is provided in the docking ring (5), a limiting rod (6) is provided in the contraction cavity (7), the lower end of the limiting rod (6) slides through the lower surface of the docking ring (5) and contacts the top of the aerosol can (1), one end of the limiting rod (6) located in the contraction cavity (7) is fixedly connected to a first limiting plate (8), a control cavity (10) is provided in the docking ring (5), a limiting slide rod (11) is provided in the control cavity (10), and the limiting slide rod ( One end of the limiting plate (11) slides through the contraction chamber (7); a first limiting plate (8) is provided with a slot adapted to the limiting slide bar (11) on a side surface facing the limiting slide bar (11); one end of the limiting slide bar (11) located in the control chamber (10) is fixedly connected with an extrusion block (12); the extrusion block (12) is in the shape of a right-angled trapezoid; a trigger pressure rod (14) is provided on the docking ring (5); the lower end of the trigger pressure rod (14) slides through the control chamber (10) and contacts the inclined surface of the extrusion block (12).

2. A highly adhesive polyurethane foam sealant anti-leakage device according to claim 1, characterized in that: A threaded head (3) is fixedly mounted on the top of the valve tube (2), a discharge hole (4) communicating with the interior of the valve tube (2) is provided on the threaded head (3), and a docking ring (5) is located at the lower side of the threaded head (3).

3. A highly adhesive polyurethane foam sealant anti-leakage device according to claim 1, characterized in that: The first limiting plate (8) is in the shape of a combination of a truncated cone and a cylinder, the small circle at the bottom of the first limiting plate (8) matches the outer surface of the limiting rod (6), and the first limiting plate (8) slides in the contraction cavity (7).

4. A highly adhesive polyurethane foam sealant anti-leakage device according to claim 3, characterized in that: A first spring (9) is fixedly connected between the upper surface of the first limiting plate (8) and the top wall of the contraction chamber (7).

5. The high-adhesive polyurethane foam sealant anti-leakage device according to claim 1, characterized in that: The extrusion block (12) is slidably connected to the bottom wall of the control chamber (10), and a second spring (13) is fixedly connected between the other side of the extrusion block (12) and the inner wall of the control chamber (10).

6. A highly adhesive polyurethane foam sealant anti-leakage device according to claim 5, characterized in that: A second limiting plate (15) is fixedly sleeved on the outer surface of one end of the trigger pressure rod (14) located in the control chamber (10).

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