Polyurethane waterproof coating conveying pipe

Abstract

The invention relates to the technical field of pipelines, in particular to a polyurethane waterproof coating conveying pipe which comprises a pipe body and a discharging assembly. The pipe body comprises an outer pipe, an inner pipe and a discharging shell, and two opposite placement surfaces are arranged on the inner wall of the outer pipe; the discharging shell is connected to the outer pipe, a working space communicating with the interior of the outer pipe is formed in the discharging shell, and the two side walls of the working space are connected with the two placement faces to form the same plane; the inner pipe is a flexible elastic pipeline; the two discharging assemblies are arranged in an up-down mirroring mode. The discharging assembly comprises an extrusion roller and rail pieces arranged in a left-right mirroring mode. The extrusion roller runs along the rail piece; the two discharging assemblies are arranged in an up-and-down mirroring mode and matched with the flexible and elastic inner pipe, the two extrusion rollers extrude the inner pipe up and down and run along the rail piece, and redundant polyurethane waterproof paint is extruded out; and the inner pipe can rebound to restore under the action of the elasticity of the inner pipe, so that the inner pipe is prevented from being adhered together.

Description

Technical Field

[0001] The present invention relates to the technical field of pipelines, and particularly to a polyurethane waterproof coating delivery pipe. Background Art

[0002] Polyurethane coatings are a relatively common type of coatings, which can be divided into two-component polyurethane coatings and one-component polyurethane coatings. Two-component polyurethane coatings generally consist of isocyanate prepolymers (also called low-molecular urethane polymers) and hydroxyl-containing resins, and are usually referred to as the curing agent component and the main agent component. There are many varieties of this type of coatings, and the application range is also very wide. According to the different hydroxyl-containing components, they can be divided into acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane, etc. Generally, they have good mechanical properties, a relatively high solid content, and good performance in all aspects. They are a type of coatings with great development prospects. The main application directions include wood coatings, automotive refinish coatings, anti-corrosion coatings, floor paints, electronic coatings, special coatings, polyurethane waterproof coatings, etc.

[0003] In the prior art, the coatings remaining in the pipeline after the transportation of polyurethane waterproof coatings are prone to curing. After long-term repeated curing, the inner diameter of the pipeline gradually decreases, causing inconvenience in use. Therefore, it is necessary to design a polyurethane waterproof coating delivery pipe that is convenient for discharging materials. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a polyurethane waterproof coating delivery pipe that is convenient for discharging materials.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: A polyurethane waterproof coating delivery pipe, comprising a pipe body and a discharging assembly; The pipe body includes an outer pipe, an inner pipe, and a discharging shell. The outer pipe is an oval hollow pipe, and there are two opposing mounting surfaces on the inner wall of the outer pipe; the discharging shell is connected to the outer pipe. The pipe body includes a feeding end opened on the discharging shell and a discharging end opened at the end of the outer pipe. The connection between the feeding end of the discharging shell and the discharging end of the outer pipe forms a conveying space; a working space communicating with the inside of the outer pipe is arranged in the discharging shell, and the two side walls of the working space are respectively coplanar with the two mounting surfaces; the working space is perpendicular to the conveying space; the inner pipe is a flexible elastic pipe, and one end of the inner pipe is connected to the feeding end and passes through the conveying space and then is connected to the discharging end; There are two groups of discharging assemblies, which are arranged in an up-and-down mirror image; the discharging assembly includes extrusion rollers and rail members arranged in a left-and-right mirror image; limiting grooves and racks are arranged on the rail members; the rail members include a vertical portion and a horizontal portion. The vertical portion is arranged on the side wall of the working space, and the horizontal portion is arranged on the mounting surface. The connection between the vertical portion and the horizontal portion is in an arc transition; The initial position of the extrusion roller is within the working space; the extrusion roller includes a flexible outer roller body, a motor, gears, and a limiting shaft. The two ends of the limiting shaft are respectively engaged with the limiting grooves of the two tracks to realize the limitation of the extrusion roller; there are two gears arranged on the limiting shaft and engaged with the racks of the two track members. The motor drives the gears to rotate coaxially with the limiting shaft, and the flexible outer roller body is rotatably sleeved outside the motor; when discharging is required, the motor rotates to drive the gears to rotate, thereby pushing the extrusion roller to operate. When the flexible outer roller bodies of the upper and lower two discharging assemblies are mutually attached, they can run along the horizontal part to extrude the polyurethane waterproof coating in the inner pipe and then return to the working space along the track members.

[0006] Preferably, the polyurethane waterproof coating delivery pipe further includes an air pump, and the working space is a sealed space; a joint communicated with the air pump is arranged on the discharging shell; the air pump is communicated with the working space through the joint; when the polyurethane waterproof coating delivery pipe feeds materials, the air pump conveys gas to the working space to inflate the working space.

[0007] Preferably, a pressure relief valve is arranged on the discharging shell; when discharging is required, the air pump is closed and the pressure relief valve is opened.

[0008] Preferably, after discharging is completed, the pressure relief valve is closed and the air pump pumps air outwards.

[0009] Preferably, a pressure sensor is further arranged in the working space. When the polyurethane waterproof coating delivery pipe feeds materials, the air pressure in the working space is approximately equal to the conveying pressure in the inner pipe.

[0010] Preferably, the edges of the track members are polished.

[0011] Preferably, a valve is arranged at the feeding end, and the valve is preferentially closed when discharging is required.

[0012] Preferably, the air pump is communicated with the working space through a filter.

[0013] Preferably, the flexible outer roller body is rotatably sleeved outside the motor through a bearing.

[0014] Preferably, the surface of the rack has a self-lubricating coating.

[0015] The beneficial effects of the present invention are as follows: There are two sets of discharging components which are arranged in an up-and-down mirror image. In cooperation with the flexible and elastic inner tube, the inner tube can convey the polyurethane waterproof coating. After the conveying is completed, the inner tube is squeezed from above and below by two squeezing rollers and runs along the track member to extrude the excess polyurethane waterproof coating, thereby preventing the reduction of the inner diameter. At the same time, the squeezed inner tube can also rebound and return to its original state under the action of its own elasticity, avoiding sticking together. And through the waist-shaped hollow pipe, while ensuring the conveying pressure of the polyurethane waterproof coating, it can increase the space in the vertical direction to facilitate the passing of the squeezing rollers. The working space and the conveying space are perpendicular to each other, which can reduce the lack of the force-bearing area of the inner tube, ensure the force-bearing effect, and avoid the deformation of the inner tube towards the working space due to the lack of the force-bearing area and the combination with the flexible elastic pipe. Through the cooperation of the gear and the rack, the effects of limiting and controlling can be achieved. Through the flexible outer roller body, when the two flexible outer roller bodies cooperate with each other, the inner tube can be completely squeezed while also avoiding damage to the inner tube caused by hard extrusion, ensuring the service life of the inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic view of a polyurethane waterproof coating conveying pipe according to a specific embodiment of the present invention from a first angle; Figure 2 is a schematic view of a polyurethane waterproof coating conveying pipe according to a specific embodiment of the present invention from a first angle; Figure 3 is a schematic view of the interior of the working space of a polyurethane waterproof coating conveying pipe according to a specific embodiment of the present invention; Figure 4 is a schematic view of the cooperation between the squeezing roller and the track member of a polyurethane waterproof coating conveying pipe according to a specific embodiment of the present invention; Reference numerals: 1, pipe body; 11, outer pipe; 12, discharging shell; 13, placement surface; 14, working space; 141, joint; 142, pressure relief valve; 2, discharging component; 21, squeezing roller; 211, outer roller body; 212, motor; 213, gear; 214, limiting shaft; 22, track member; 221, vertical part; 222, horizontal part; 23, limiting groove; 24, rack. SPECIFIC EMBODIMENTS

[0017] To describe the technical content, the achieved objectives and the effects of the present invention in detail, the following is described in conjunction with the embodiments and with reference to the drawings.

[0018] Please refer to Figures 1 to 4 , a polyurethane waterproof coating conveying pipe, comprising a pipe body 1 and a discharging component 2; The tube body 1 includes an outer tube 11, an inner tube, and a discharge housing 12. The outer tube 11 is an oval hollow pipe. There are two opposing mounting surfaces 13 on the inner wall of the outer tube 11. The discharge housing 12 is connected to the outer tube 11. The tube body 1 includes a feed end opened on the discharge housing 12 and a discharge end opened at the end of the outer tube 11. The connection between the feed end of the discharge housing 12 and the discharge end of the outer tube 11 forms a conveying space. A working space 14 communicating with the inside of the outer tube 11 is provided in the discharge housing 12, and the two side walls of the working space 14 are respectively connected to the two mounting surfaces 13 to form the same plane. The working space 14 is perpendicular to the conveying space. The inner tube is a flexible elastic pipe. One end of the inner tube is connected to the feed end and passes through the conveying space and then is connected to the discharge end. There are two sets of the discharge assemblies 2 and they are arranged symmetrically up and down. The discharge assembly 2 includes extrusion rollers 21 and rail members 22 arranged symmetrically left and right. The rail member 22 is provided with a limiting groove 23 and a rack 24. The rail member 22 includes a vertical portion 221 and a horizontal portion 222. The vertical portion 221 is arranged on the side wall of the working space 14, and the horizontal portion 222 is arranged on the mounting surface 13. The connection between the vertical portion 221 and the horizontal portion 222 is in an arc transition. The initial position of the extrusion roller 21 is located in the working space 14. The extrusion roller 21 includes a flexible outer roller body 211, a motor 212, gears 213, and a limiting shaft 214. The two ends of the limiting shaft 214 are respectively matched with the limiting grooves 23 of the two rails to realize the limitation of the extrusion roller 21. There are two gears 213 arranged on the limiting shaft 214 and they are matched with the racks 24 of the two rail members 22. The motor 212 drives the gears 213 to rotate coaxially with the limiting shaft 214. The flexible outer roller body 211 is rotatably sleeved outside the motor 212. When discharging is required, the motor 212 rotates to drive the gears 213 to rotate, thereby pushing the extrusion roller 21 to operate. When the flexible outer roller bodies 211 of the two sets of discharge assemblies 2 on the upper and lower sides are in contact with each other, they can run along the horizontal portion 222 to extrude the polyurethane waterproof coating in the inner tube and then return to the working space 14 along the rail member 22.

[0019] As can be seen from the above description, there are two sets of discharging components 2 which are arranged in an up-and-down mirror image, and in cooperation with the flexible and elastic inner tube, the inner tube can convey the polyurethane waterproof coating. After the conveying is completed, the two extrusion rollers 21 move in a mirror image, and at the corner of the arc transition, the outer surface of the flexible outer roller body 211 squeezes the inner tube up and down and runs along the track member 22, so as to extrude the redundant polyurethane waterproof coating, thereby preventing the reduction of the inner diameter; at the same time, the extruded inner tube can also rebound and return to its original state under the action of its own elasticity, avoiding sticking together; and through the waist-shaped hollow pipe, while ensuring the conveying pressure of the polyurethane waterproof coating, it can increase the space in the vertical direction to facilitate the passage of the extrusion roller 21; the working space 14 is perpendicular to the conveying space, which can reduce the lack of the stress area of the inner tube, ensure the stress effect, and avoid the deformation of the inner tube towards the working space 14 due to the lack of the stress area combined with the flexible elastic pipe; through the cooperation of the gear 213 and the rack 24, the effects of limiting and controlling can be achieved; through the flexible outer roller body 211, when the two flexible outer roller bodies 211 cooperate with each other, the inner tube can be completely extruded and at the same time, the inner tube can be prevented from being damaged by hard extrusion, ensuring the service life of the inner tube.

[0020] Further, the polyurethane waterproof coating conveying pipe further includes an air pump, and the working space 14 is a sealed space; a joint 141 communicated with the air pump is arranged on the discharging shell 12; the air pump is communicated with the working space 14 through the joint 141; when the polyurethane waterproof coating conveying pipe feeds materials, the air pump conveys gas to the working space 14 to inflate the working space 14.

[0021] As can be seen from the above description, by inflating the working space 14, the force on each angle of the inner tube can be made more uniform, which is convenient for maintaining the cylindrical conveying mode, and at the same time, it can also avoid the situation that the stress area between the inner tube and the working space 14 is small and the inner tube is prone to deformation or rupture here.

[0022] Further, a pressure relief valve 142 is arranged on the discharging shell 12; when discharging is required, the air pump is closed and the pressure relief valve 142 is opened.

[0023] As can be seen from the above description, through pressure relief, it is avoided that the pressure inside the inner tube decreases during discharging, and due to the inconsistent elasticity of the inner tube, local tightening or even closing may occur, resulting in unsmooth discharging.

[0024] Further, after the discharging is completed, the pressure relief valve 142 is closed and the air pump pumps air outwards.

[0025] As can be seen from the above description, by pumping air, a negative pressure is formed inside, which can facilitate the inner tube to return to its original state; it is avoided that because the polyurethane waterproof coating is too viscous, the inner tube is locally stuck together and then scrapped after being completely dried.

[0026] Furthermore, a pressure sensor is also provided in the working space 14. When the polyurethane waterproof coating delivery pipe is feeding, the air pressure in the working space 14 is approximately equal to the conveying pressure inside the inner pipe.

[0027] As can be seen from the above description, by controlling the air pressure and the conveying pressure, pressure balance can be achieved, avoiding damage or excessive deformation of the inner pipe caused by the pressure difference, and extending the service life.

[0028] Furthermore, the edge of the rail member 22 is polished.

[0029] As can be seen from the above description, through the polishing treatment, it is possible to avoid damage or puncture of the inner pipe by the sharp edge of the rack 24.

[0030] Furthermore, a valve is provided at the feeding end, and the valve is preferably closed when discharging is required.

[0031] As can be seen from the above description, by closing the valve, it is possible to prevent the polyurethane waterproof coating from being squeezed back into the original conveying device or storage tank, that is, to avoid reverse return.

[0032] Furthermore, the air pump is connected to the working space 14 through a filter.

[0033] As can be seen from the above description, through the setting of the filter, it is possible to prevent impurities from entering the working space 14.

[0034] Furthermore, the flexible outer roller body 211 is rotatably sleeved outside the motor 212 through a bearing.

[0035] Furthermore, the surface of the rack 24 has a self-lubricating coating.

[0036] As can be seen from the above description, through the setting of the self-lubricating coating, it is possible to prevent the introduction of substances such as lubricating oil or grease that will oxidize and deteriorate or drip over time, and avoid corrosion of the inner pipe. Embodiment 1

[0037] A polyurethane waterproof coating delivery pipe, comprising a pipe body 1 and a discharging assembly 2; The tube body 1 includes an outer tube 11, an inner tube, and a discharge housing 12. The outer tube 11 is an oval-shaped hollow pipe, and there are two opposing placement surfaces 13 on the inner wall of the outer tube 11; the discharge housing 12 is connected to the outer tube 11. The tube body 1 includes a feed end opened in the discharge housing 12 and a discharge end opened at the end of the outer tube 11. The communication between the feed end of the discharge housing 12 and the discharge end of the outer tube 11 forms a conveying space; a working space 14 communicating with the inside of the outer tube 11 is provided in the discharge housing 12, and the two side walls of the working space 14 are respectively connected to the two placement surfaces 13 to form the same plane; the working space 14 and the conveying space are perpendicular to each other; the inner tube is a flexible elastic pipe, and one end of the inner tube is connected to the feed end and passes through the conveying space and then is connected to the discharge end; There are two sets of the discharge assemblies 2 and they are arranged in an up-and-down mirror image; the discharge assembly 2 includes a pressing roller 21 and a rail member 22 arranged in a left-and-right mirror image; a limiting groove 23 and a rack 24 are provided on the rail member 22; the rail member 22 includes a vertical portion 221 and a horizontal portion 222. The vertical portion 221 is provided on the side wall of the working space 14, and the horizontal portion 222 is provided on the placement surface 13. The connection between the vertical portion 221 and the horizontal portion 222 is in an arc transition; The initial position of the pressing roller 21 is located in the working space 14; the pressing roller 21 includes a flexible outer roller body 211 (such as a silicone roller, a rubber roller, etc., mainly as long as it is soft), a motor 212, a gear 213, and a limiting shaft 214. The two ends of the limiting shaft 214 are respectively matched with the limiting grooves 23 of the two rails to realize the limitation of the pressing roller 21; there are two gears 213 which are arranged on the limiting shaft 214 and then are matched with the racks 24 of the two rail members 22. The motor 212 drives the gear 213 to rotate coaxially with the limiting shaft 214, and the flexible outer roller body 211 is rotatably sleeved outside the motor 212; when discharging is required, the motor 212 rotates to drive the gear 213 to rotate, and then pushes the pressing roller 21 to run. When the flexible outer roller bodies 211 of the two sets of discharge assemblies 2 on the upper and lower sides are mutually attached, they can run along the horizontal portion 222 to extrude the polyurethane waterproof coating in the inner tube and then return to the working space 14 along the rail member 22. Embodiment Two

[0038] A polyurethane waterproof coating conveying pipe, the same parts as those in Embodiment One will not be described in detail again, and further includes: The polyurethane waterproof coating conveying pipe further includes an air pump, and the working space 14 is a sealed space; a connector 141 communicating with the air pump is provided on the discharge housing 12; the air pump is communicated with the working space 14 through the connector 141; when the polyurethane waterproof coating conveying pipe feeds materials, the air pump conveys gas to the working space 14 to inflate the working space 14.

[0039] A pressure relief valve 142 is provided on the discharging housing 12; when discharging is required, the air pump is turned off and the pressure relief valve 142 is opened.

[0040] After discharging is completed, the pressure relief valve 142 is closed and the air pump pumps air outwards. Embodiment III

[0041] A polyurethane waterproof coating delivery pipe, the same parts as those in Embodiment II will not be described in detail again, and further includes: A pressure sensor is further provided in the working space 14. When the polyurethane waterproof coating delivery pipe feeds materials, the air pressure in the working space 14 is approximately equal to the conveying pressure inside the inner pipe.

[0042] The edge of the track member 22 is polished.

[0043] A valve is provided at the feeding end, and the valve is preferentially closed when discharging is required.

[0044] The air pump is communicated with the working space 14 through a filter.

[0045] The flexible outer roller body 211 is rotatably sleeved outside the motor 212 through a bearing.

[0046] The surface of the rack 24 has a self-lubricating coating.

[0047] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, shall be equally included in the patent protection scope of the present invention.

Claims

1. A polyurethane waterproof coating delivery pipe, characterized in that, It includes a pipe body and a discharging component; The pipe body includes an outer pipe, an inner pipe and a discharging shell. The outer pipe is an oval hollow pipe. There are two opposite mounting surfaces on the inner wall of the outer pipe. The discharging shell is connected to the outer pipe. The pipe body includes a feed end opened on the discharging shell and a discharge end opened at the end of the outer pipe. The communication between the feed end of the discharging shell and the discharge end of the outer pipe forms a conveying space. A working space communicating with the inside of the outer pipe is arranged in the discharging shell, and the two side walls of the working space are respectively connected to the two mounting surfaces to form the same plane. The working space is perpendicular to the conveying space. The inner pipe is a flexible elastic pipe. One end of the inner pipe is connected to the feed end, passes through the conveying space and is then connected to the discharge end; There are two groups of the discharging components, which are arranged symmetrically up and down. The discharging component includes a squeezing roller and a track member arranged symmetrically left and right. A limiting groove and a rack are arranged on the track member. The track member includes a vertical part and a horizontal part. The vertical part is arranged on the side wall of the working space, and the horizontal part is arranged on the mounting surface. The connection between the vertical part and the horizontal part is in an arc transition; The initial position of the squeezing roller is in the working space. The squeezing roller includes a flexible outer roller body, a motor, a gear and a limiting shaft. The two ends of the limiting shaft are respectively matched with the limiting grooves of the two tracks to realize the limitation of the squeezing roller. There are two gears arranged on the limiting shaft and matched with the racks of the two track members. The motor drives the gear to rotate coaxially with the limiting shaft, and the flexible outer roller body is rotatably sleeved outside the motor. When discharging is required, the motor rotates to drive the gear to rotate, and then pushes the squeezing roller to run. When the flexible outer roller bodies of the upper and lower two discharging components are in contact with each other, they can run along the horizontal part to extrude the polyurethane waterproof coating in the inner pipe and then return to the working space along the track member.

2. The polyurethane waterproof coating delivery pipe according to claim 1, characterized in that, The polyurethane waterproof coating conveying pipe further includes an air pump. The working space is a sealed space. A joint communicating with the air pump is arranged on the discharging shell. The air pump is communicated with the working space through the joint. When the polyurethane waterproof coating conveying pipe feeds the material, the air pump conveys gas to the working space to inflate the working space.

3. The polyurethane waterproof coating delivery pipe according to claim 2, characterized in that, A pressure relief valve is arranged on the discharging shell. When discharging is required, the air pump is closed and the pressure relief valve is opened.

4. The polyurethane waterproof coating delivery pipe according to claim 3, characterized in that, After discharging is completed, the pressure relief valve is closed and the air pump pumps air outwards.

5. The polyurethane waterproof coating delivery pipe according to claim 2, characterized in that, A pressure sensor is also arranged in the working space. When the polyurethane waterproof coating conveying pipe feeds the material, the air pressure in the working space is approximately equal to the conveying pressure in the inner pipe.

6. The polyurethane waterproof coating delivery pipe according to claim 1, wherein The edge of the track member is polished.

7. The polyurethane waterproof coating delivery pipe according to claim 1, wherein A valve is arranged on the feed end. When discharging is required, the valve is preferably closed first.

8. The polyurethane waterproof coating delivery pipe according to claim 1, characterized in that, The air pump is communicated with the working space through a filter.

9. The polyurethane waterproof coating delivery pipe according to claim 1, wherein The flexible outer roller body is rotatably sleeved outside the motor through a bearing.

10. The polyurethane waterproof coating delivery pipe according to claim 1, characterized in that, The surface of the rack has a self-lubricating coating.

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