One-piece molding process for fire hose

Abstract

The present invention belongs to the technical field of fire hose production, and in particular to an integrated forming process of a fire hose, comprising the following steps: step one, preparing lining raw materials and outer jacket raw materials; step two, putting the lining raw materials into an extruder, and performing a gluing process while extruding the tube. After completion, the inner tube obtained is rolled up and shrunk in a placement plate, and is moved to an insulation chamber for insulation. The outer jacket raw materials are twisted in the weft and warp, and after passing the inspection. The integrated forming process of the fire hose, when the device is manufacturing the fire hose, adopts a braiding machine and a heating forming mechanism to operate synchronously, weaves an outer tube on the outer surface of the inner tube, and simultaneously transports it to the heating forming mechanism for integrated heating forming, thereby enhancing the production efficiency of the fire hose and improving the production quality, avoiding the existing method of independently forming the inner tube and the outer tube first, and then using an independent mechanism for heating forming, which has low operating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of fire hose manufacturing, and in particular to an integrated molding process for a fire hose. Background Art

[0002] A fire hose is a flexible pipe used to transport high-pressure water or flame-retardant liquids such as foam. Traditional fire hoses are lined with rubber and covered with woven linen. Advanced fire hoses are made of polymer materials such as polyurethane. There are metal connectors at both ends of the fire hose, which can be connected to another hose to extend the distance or to a nozzle to increase the pressure of the liquid spray.

[0003] At present, in the production of fire hoses, the inner lining and the outer lining are first manufactured using independent equipment, and then put into the molding and bonding equipment for oil heating or water heating to bond and form an integrated body, resulting in low temperature control accuracy, the temperature is either too high or too low, and it is easy to cause burns due to high temperature or unreliable bonding due to low temperature during molding, and the molding efficiency is low. It cannot be processed and manufactured together during molding, so an integrated molding process for fire hoses is needed. Summary of the invention

[0004] Based on the existing technical problems, the present invention proposes an integrated molding process for a fire hose.

[0005] The present invention provides an integrated forming process for a fire hose, comprising the following steps: step 1, preparing a lining material and a jacket material;

[0006] Step 2: Put the lining raw material into the extruder, and carry out the gluing process while extruding the tube. After completion, the inner tube is rolled and shrunk in the placement plate, and moved to the insulation room for insulation. The outer shell raw material is twisted in the weft and warp. After passing the inspection, it is placed on the knitting disc machine and waits for production;

[0007] Step 3, install the inner tube that is rolled and shrunk inside the placement disk at the output end of the knitting circular machine, control one end of the inner tube to pass through the center of the knitting circular machine and connect to the winding wheel of the knitting circular machine, and knit around the inner tube through the weft and warp of the outer shell raw material installed on the knitting circular machine, so that the outer tube is formed on the surface of the inner tube, and the outer tube is sleeved on the surface of the inner tube, passes through the heating and forming mechanism, and is connected to the winding wheel of the knitting circular machine together with the inner tube;

[0008] Step 4: Clamp the inner tube and the outer tube at both ends of the heating and forming mechanism by means of a clamping mechanism, and open an air inlet hole on the surface of the outer tube and the inner tube at one end of the heating and forming mechanism close to the winding wheel. Use an air pump to control the air pressure and connect the air pipe at the air outlet of the air pump to the air inlet hole, so that the air pressure fills the interior of the two clamping mechanisms, and use the air pressure to make the outer surface of the inner tube contact with the inner wall of the outer tube to expand it, and the internal air pressure is 0.9-1.2MPa;

[0009] Step 5: After the air pressure is filled and expanded, the air pressure seal inside is maintained to form a constant pressure state through the clamping mechanisms at both ends. After the air pipe of the air pump is pulled out, the reeling wheel is used to reel the inner tube and the outer tube, and the air inlet is controlled to be away from the inside of the two clamping mechanisms. The heating and forming mechanism is driven to work, and the inner tube and the outer tube are controlled to be bonded to form a whole.

[0010] Step 6: When the heating and forming mechanism works, the winding and reeling of the one-piece fire hose is controlled under the rotating reeling of the reeling wheel. After the processing is completed, the cutting operation of the head and tail ends of the formed fire hose is controlled to finally obtain a qualified one-piece fire hose.

[0011] Preferably, the clamping mechanism includes an installation connecting rod, one end of which is fixedly mounted on the installation surface of the corresponding knitting circular machine, and a guide conveying seat is fixedly mounted on the top of the installation connecting rod, and the inner wall of the guide conveying seat is slidably plugged into the outer surface of the outer layer tube.

[0012] Preferably, a transfer groove is provided on the inner bottom wall of the guide conveying seat, and the inner wall of the transfer groove is rotatably connected to a first rotating shaft through a bearing, a lower roller is fixedly mounted on the arc surface of the first rotating shaft, and the arc surface of the lower roller is slidably plugged into the bottom of the outer tube.

[0013] Preferably, a plug-in groove is provided at the top of the guide conveying seat, an extrusion seat is slidably plugged into the inner wall of the plug-in groove, an auxiliary groove is provided at the bottom of the extrusion seat, the inner wall of the auxiliary groove is rotatably connected to a second rotating shaft through a bearing, an upper roller is fixedly installed on the circular arc surface of the second rotating shaft, and the circular arc surface of the upper roller is slidably plugged into the top of the outer layer tube.

[0014] Preferably, support rods are fixedly installed on the arc surfaces on both sides of the guide conveying seat, mounting plates are fixedly installed on the tops of the two support rods, a cylinder is fixedly installed on the top of the mounting plates, the telescopic bottom end of the cylinder passes through and extends to the bottom of the mounting plate, and the telescopic bottom end of the cylinder is fixedly installed with the top center of the extrusion seat.

[0015] Preferably, the heating and forming mechanism includes support columns, the bottoms of the two support columns are fixedly mounted on the mounting surface relative to the knitting circular machine, the two support columns are arranged in a high and low arrangement, and the tops of the two support columns are fixedly mounted with guide forming tubes, the inner layer tube and the outer layer tube are movably connected to the inner wall of the guide forming tube, and the arc surface of the outer layer tube is slidably connected to the arc inner wall of the guide forming tube.

[0016] Preferably, an electromagnetic heating coil is fixedly mounted on the surface of the guide forming tube, and a plurality of the electromagnetic heating coils are linearly arranged and distributed on the surface of the guide forming tube with respect to the axis of the guide forming tube.

[0017] Preferably, the electromagnetic heating coil is a cast aluminum electric heating coil, and the heating temperature of the electromagnetic heating coil is 80-100°C.

[0018] Preferably, the outer shell is made of polyester and polyester fiber, and the lining is made of rubber, polyurethane and methylated trimethylolmelamine resin.

[0019] Preferably, the polyester is selected in an amount of 10-20 parts, the polyester fiber is selected in an amount of 10-20 parts, the rubber is selected in an amount of 15-25 parts, the polyurethane is selected in an amount of 6-8 parts, and the methyl etherified trimethylol melamine resin is selected in an amount of 10-15 parts.

[0020] The beneficial effects of the present invention are:

[0021] 1. When manufacturing fire hoses, the device uses a braiding machine and a heating and forming mechanism to operate synchronously. The outer tube is knitted on the outer surface of the inner tube and is simultaneously transported to the heating and forming mechanism for integrated heating and forming, thereby enhancing the production efficiency of the fire hose and improving the production quality, avoiding the existing method of independently forming the inner tube and the outer tube first, and then using an independent mechanism for heating and forming, which has low operating efficiency.

[0022] 2. By setting up a clamping mechanism, the two sides of the heating and forming mechanism are clamped, and the interior of the heating and forming mechanism is controlled to form a closed space, so that it is convenient to fill the air pressure so that the inner tube squeezes the outer tube for expansion operation. At the same time, auxiliary follow-up winding can be performed during the winding after forming, so as to always keep the internal air pressure constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an integrated molding process for a fire hose;

[0024] Figure 2 A three-dimensional diagram of the outer tube structure of a fire hose in an integrated molding process;

[0025] Figure 3This is an exploded view of the one-piece molding process of a fire hose;

[0026] Figure 4 A three-dimensional diagram of a heating molding mechanism for an integrated molding process of a fire hose;

[0027] Figure 5 It is a cross-sectional view of a clamping mechanism of an integrated molding process for a fire hose;

[0028] Figure 6 The present invention is a three-dimensional diagram of a clamping mechanism of an integrated molding process for a fire hose.

[0029] In the figure: 1. inner tube; 2. placement disk; 3. knitting disc machine; 4. winding wheel; 5. outer tube; 6. heating and forming mechanism; 61. support column; 62. guide forming tube; 63. electromagnetic heating ring; 7. clamping mechanism; 71. installation connecting rod; 72. guide conveying seat; 73. adapter groove; 74. first rotating shaft; 75. lower roller; 76. plug-in groove; 77. extrusion seat; 78. auxiliary groove; 79. second rotating shaft; 710. upper roller; 711. support rod; 712. mounting plate; 713. cylinder; 8. air inlet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-Figure 6 A one-piece molding process for a fire hose comprises the following steps: step 1, preparing lining materials and outer jacket materials, wherein the outer jacket materials are polyester and polyester fiber, and the lining materials are rubber, polyurethane and methyl etherified trimethylol melamine resin; 10-20 parts of polyester, 10-20 parts of polyester fiber, 15-25 parts of rubber, 6-8 parts of polyurethane, and 10-15 parts of methyl etherified trimethylol melamine resin.

[0032] Step 2: Put the lining raw material into the extruder, and carry out the gluing process while extruding the tube. After completion, the inner tube 1 is rolled up and shrunk in the placement disk 2, and moved to the insulation room for insulation. The outer shell raw material is twisted in the weft and warp. After passing the inspection, it is placed on the knitting disc machine 3 and waits for production.

[0033] Step three, install the inner tube 1 that is rolled up and shrunk inside the placement disk 2 at the output end of the knitting disc machine 3, control one end of the inner tube 1 to pass through the center of the knitting disc machine 3 and connect to the winding wheel 4 of the knitting disc machine 3, and knit around the inner tube 1 through the weft and warp of the outer shell raw material installed on the knitting disc machine 3, so that the outer tube 5 is formed on the surface of the inner tube 1, and the outer tube 5 is sleeved on the surface of the inner tube 1, passes through the heating and molding mechanism 6, and is connected to the winding wheel 4 of the knitting disc machine 3 together with the inner tube 1.

[0034] Step 4. The inner tube 1 and the outer tube 5 entering are clamped by the clamping mechanism 7 at both ends of the heating and forming mechanism 6. An air inlet hole 8 is opened on the surface of the outer tube 5 and the inner tube 1 at the end of the heating and forming mechanism 6 close to the winding wheel 4. The air pressure is controlled by an air pump and connected to the air inlet hole 8 through the air pipe at the air outlet end of the air pump, so that the air pressure fills the interior of the two clamping mechanisms 7. The air pressure is used to make the outer surface of the inner tube 1 contact with the inner wall of the outer tube 5 to make it expand, and the internal air pressure is 0.9-1.2MPa.

[0035] In order to enable the heating molding mechanism 6 to heat and expand and bond the inner tube 1 and the outer tube 5 to form a closed space, a clamping mechanism 7 is provided, including an installation connecting rod 71, one end of which is fixedly installed on the installation surface of the corresponding knitting disc machine 3, and a guide conveying seat 72 is fixedly installed on the top of the installation connecting rod 71, and the inner wall of the guide conveying seat 72 is slidably plugged into the outer surface of the outer tube 5.

[0036] Specifically, a clamping mechanism 7 is provided on both sides of the heating and forming mechanism 6 to clamp and seal the inner tube 1 and the outer tube 5, so that a closed space is formed at one end of the heating and forming mechanism 6. The inner tube 1 and the outer tube 5 can also be transported during clamping, and a guide transport seat 72 is provided to facilitate the effect of moving and transporting in a sealed state.

[0037] The inner bottom wall of the guide conveying seat 72 is provided with a transfer groove 73, the inner wall of the transfer groove 73 is rotatably connected to a first rotating shaft 74 through a bearing, a lower roller 75 is fixedly mounted on the arc surface of the first rotating shaft 74, and the arc surface of the lower roller 75 is slidably plugged into the bottom of the outer layer tube 5.

[0038] Specifically, a transfer groove 73 is opened inside the guide conveying seat 72, and the bottom of the outer tube 5 is squeezed by the lower roller 75 during clamping. The first rotating shaft 74 rotates while pulling the outer tube 5 to move, thereby promoting the conveying and movement of the outer tube 5.

[0039] A plug-in groove 76 is provided at the top of the guide conveying seat 72, and an extrusion seat 77 is slidably inserted into the inner wall of the plug-in groove 76. An auxiliary groove 78 is provided at the bottom of the extrusion seat 77. The inner wall of the auxiliary groove 78 is rotatably connected to a second rotating shaft 79 through a bearing. An upper roller 710 is fixedly installed on the arc surface of the second rotating shaft 79, and the arc surface of the upper roller 710 is slidably inserted into the top of the outer layer tube 5.

[0040] Specifically, the outer tube 5 is conveyed while the upper roller 710 at the top is used to squeeze the lower roller 75 so that the outer tube 5 and the inner tube 1 are squeezed and sealed. During the conveying, the second rotating shaft 79 and the first rotating shaft 74 rotate, and the upper roller and the lower roller squeeze the outer tube 5 while pulling the outer tube 5 to move and convey it.

[0041] Support rods 711 are fixedly installed on the arc surfaces on both sides of the guide conveying seat 72, and mounting plates 712 are fixedly installed on the tops of the two support rods 711. A cylinder 713 is fixedly installed on the top of the mounting plate 712. The telescopic bottom end of the cylinder 713 passes through and extends to the bottom of the mounting plate 712, and the telescopic bottom end of the cylinder 713 is fixedly installed with the top center of the extrusion seat 77.

[0042] Specifically, during clamping, the telescopic movement of the cylinder 713 is used to drive the extrusion seat 77 below to move downward, thereby driving the surface of the upper roller 710 to be squeezed on the top of the outer tube 5 for an extrusion operation, thereby forming a closed space inside the two clamping mechanisms 7, which is convenient for controlling the closed space to be filled with air pressure to expand it.

[0043] Step 5. After the air pressure is filled and expanded, the internal air pressure seal is maintained to form a constant pressure state through the clamping mechanisms 7 at both ends. After the air pipe of the air pump is pulled out, the winding wheel 4 is used to perform the winding operation, so that it pulls the inner tube 1 and the outer tube 5 to roll up, and the air inlet 8 is controlled to be away from the inside of the two clamping mechanisms 7. When the heating and forming mechanism 6 is driven to work, the inner tube 1 and the outer tube 5 are controlled to be bonded to form a whole.

[0044] In order to wrap the inner tube 1 after the outer tube 5 is woven and formed for integrated forming, a heating forming mechanism 6 is provided, including support columns 61. The bottoms of the two support columns 61 are fixedly mounted on the mounting surface relative to the knitting disc machine 3. The two support columns 61 are arranged in a high and low arrangement, and a guide forming tube 62 is fixedly mounted on the top of the two support columns 61. The inner tube 1 and the outer tube 5 are movably connected to the inner wall of the guide forming tube 62, and the arc surface of the outer tube 5 is slidably plugged into the arc inner wall of the guide forming tube 62.

[0045] Specifically, when the outer tube 5 wrapped with the inner tube 1 enters the guide forming tube 62 together, the guide forming tube 62 limits the outer tube 5 so that the inner tube 1 can squeeze the outer tube 5 under air pressure.

[0046] An electromagnetic heating coil 63 is fixedly mounted on the surface of the guide forming tube 62 , and a plurality of electromagnetic heating coils 63 are linearly arranged and distributed on the surface of the guide forming tube 62 around the axis of the guide forming tube 62 .

[0047] Specifically, when the outer tube 5 and the inner tube 1 entering the guide forming tube 62 are squeezed under air pressure, the electromagnetic heating coil 63 is powered on to transfer its temperature to the inside of the guide forming tube 62, squeezing the outer tube 5 against the inner tube 1 to achieve the effect of bonding them.

[0048] The electromagnetic heating coil 63 is a cast aluminum electric heating coil, and the heating temperature of the electromagnetic heating coil 63 is 80-100°C.

[0049] Specifically, by adopting the electromagnetic heating ring 63, the bonding and molding can be carried out quickly under the integrated heating molding, and the temperature is easy to control with high precision and fast adjustment speed, avoiding the existing majority of oil temperature or water temperature heating, poor temperature control effect, easy to cause unreliable bonding during molding or bonding damage during flaw detection, resulting in low molding efficiency and reduced production quality of fire hoses.

[0050] Step 6: When the heating and forming mechanism 6 works, the winding wheel 4 rotates and reels to control the winding and reeling of the one-piece fire hose. After the processing is completed, the cutting operation of the head and tail ends of the formed fire hose is controlled to finally obtain a qualified one-piece fire hose.

[0051] When manufacturing a fire hose, the device adopts a synchronous operation of a braiding machine and a heating and forming mechanism 6, weaves an outer tube 5 on the outer surface of an inner tube 1, and simultaneously conveys it to the heating and forming mechanism 6 for integrated heating and forming, thereby enhancing the production efficiency of the fire hose and improving the production quality, avoiding the existing method of independently forming the inner tube 1 and the outer tube 5 first, and then using independent mechanisms for heating and forming operations, which has low operating efficiency.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated forming process for a fire hose, characterized in that: The method comprises the following steps: step 1, preparing the raw materials for the lining and the raw materials for the outer jacket; Step 2: Put the lining raw material into the extruder, and carry out the gluing process while extruding the tube. After completion, the inner tube (1) is rolled and shrunk in the placement plate (2), and moved to the insulation room for insulation. The outer shell raw material is twisted in the weft and warp, and after passing the inspection, it is placed on the knitting disc machine (3) for preparation; Step 3, the inner tube (1) which is shrunk in a roll inside the placement disk (2) is installed at the output end of the knitting disc machine (3), one end of the inner tube (1) is controlled to pass through the center of the knitting disc machine (3) and connected to the winding wheel (4) of the knitting disc machine (3), and the weft and warp threads of the outer shell raw material installed on the knitting disc machine (3) are knitted around the inner tube (1), so that the surface of the inner tube (1) forms an outer tube (5), and the outer tube (5) is sleeved on the surface of the inner tube (1), passes through the heating and forming mechanism (6), and is connected to the winding wheel (4) of the knitting disc machine (3) together with the inner tube (1); Step 4: The inner tube (1) and the outer tube (5) entering are clamped by means of a clamping mechanism (7) at both ends of the heating and forming mechanism (6), and an air inlet hole (8) is provided on the surface of the outer tube (5) and the inner tube (1) at one end of the heating and forming mechanism (6) close to the winding wheel (4). The air pressure is controlled by an air pump and connected to the air inlet hole (8) through the air pipe at the air outlet end of the air pump, so that the air pressure is filled into the interior of the two clamping mechanisms (7), and the air pressure is used to make the outer surface of the inner tube (1) contact with the inner wall of the outer tube (5) to expand and expand, and the internal air pressure is 0.9-1.2MPa; Step 5: After the air pressure is filled and expanded, the air pressure seal inside is maintained to form a constant pressure state through the clamping mechanisms (7) at both ends. After the air pipe of the air pump is pulled out, the reeling wheel (4) is used to reel up the inner tube (1) and the outer tube (5), and the air inlet hole (8) is controlled to be away from the inside of the two clamping mechanisms (7). The heating and forming mechanism (6) is driven to work, and the inner tube (1) and the outer tube (5) are controlled to be bonded to form a whole. Step 6: When the heating and forming mechanism (6) works, the winding wheel (4) rotates and reels to control the winding and reeling of the one-piece fire hose. After the processing is completed, the cutting operation of the formed head and tail ends is controlled to finally produce a qualified one-piece fire hose.

2. The one-piece forming process of a fire hose according to claim 1, characterized in that: The clamping mechanism (7) comprises a mounting connecting rod (71), one end of which is fixedly mounted on the mounting surface of the corresponding knitting circular machine (3), and a guide conveying seat (72) is fixedly mounted on the top of the mounting connecting rod (71), and the inner wall of the guide conveying seat (72) is slidably plugged into the outer surface of the outer layer tube (5).

3. The one-piece forming process of a fire hose according to claim 2, characterized in that: The inner bottom wall of the guide conveying seat (72) is provided with a transfer groove (73), and the inner wall of the transfer groove (73) is rotatably connected to a first rotating shaft (74) via a bearing. A lower roller (75) is fixedly mounted on the circular arc surface of the first rotating shaft (74), and the circular arc surface of the lower roller (75) is slidably plugged into the bottom of the outer layer tube (5).

4. The one-piece forming process of a fire hose according to claim 2, characterized in that: The top of the guide conveying seat (72) is provided with a plug-in groove (76), the inner wall of the plug-in groove (76) is slidably plugged with an extrusion seat (77), the bottom of the extrusion seat (77) is provided with an auxiliary groove (78), the inner wall of the auxiliary groove (78) is rotatably connected to a second rotating shaft (79) through a bearing, the arc surface of the second rotating shaft (79) is fixedly mounted with an upper roller (710), and the arc surface of the upper roller (710) is slidably plugged with the top of the outer layer tube (5).

5. The one-piece forming process of a fire hose according to claim 4, characterized in that: Support rods (711) are fixedly mounted on the arc surfaces on both sides of the guide conveying seat (72), mounting plates (712) are fixedly mounted on the tops of the two support rods (711), a cylinder (713) is fixedly mounted on the top of the mounting plate (712), a telescopic bottom end of the cylinder (713) passes through and extends to the bottom of the mounting plate (712), and the telescopic bottom end of the cylinder (713) is fixedly mounted to the top center of the extrusion seat (77).

6. The one-piece forming process of a fire hose according to claim 1, characterized in that: The heating and forming mechanism (6) comprises a support column (61), the bottoms of the two support columns (61) are fixedly mounted on the mounting surface relative to the knitting disc machine (3), the two support columns (61) are arranged in a high and low arrangement, and the tops of the two support columns (61) are fixedly mounted with a guide forming tube (62), the inner layer tube (1) and the outer layer tube (5) are movably sleeved on the inner wall of the guide forming tube (62), and the arc surface of the outer layer tube (5) is slidably plugged into the arc inner wall of the guide forming tube (62).

7. The one-piece forming process of a fire hose according to claim 6, characterized in that: An electromagnetic heating coil (63) is fixedly mounted on the surface of the guide forming tube (62), and a plurality of the electromagnetic heating coils (63) are linearly arranged and distributed on the surface of the guide forming tube (62) around the axis of the guide forming tube (62).

8. The one-piece forming process of a fire hose according to claim 7, characterized in that: The electromagnetic heating coil (63) is a cast aluminum electric heating coil, and the heating temperature of the electromagnetic heating coil (63) is 80-100°C.

9. The one-piece forming process of a fire hose according to claim 1, characterized in that: The outer shell in step 1 is made of polyester and polyester fiber, and the inner lining in step 1 is made of rubber, polyurethane and methylated trimethylolmelamine resin.

10. The one-piece forming process of a fire hose according to claim 9, characterized in that: The polyester is selected in an amount of 10-20 parts, the polyester fiber is selected in an amount of 10-20 parts, the rubber is selected in an amount of 15-25 parts, the polyurethane is selected in an amount of 6-8 parts, and the methyl etherified trimethylol melamine resin is selected in an amount of 10-15 parts.

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