Extrusion process of rubber tube containing reinforcing layer

Abstract

The invention discloses an extrusion process of a rubber tube containing a reinforcing layer, and belongs to the field of rubber tube processing, and the extrusion process comprises the following steps: S1, preparing an inner-layer rubber tube through extrusion, cooling and molding; s2, the outer wall of the formed inner-layer rubber pipe is coated with a reinforcing layer, and the reinforced rubber pipe is obtained after forming; s3, the reinforced rubber pipe passes through a high-temperature drying tunnel and then enters an outer rubber extruder to wrap an outer layer rubber pipe, after cooling forming, the rubber pipe containing the reinforced layer is obtained, and the rubber pipe containing the reinforced layer sequentially comprises an inner layer rubber pipe, the reinforced layer and the outer layer rubber pipe in the radial direction of the rubber pipe; the high-temperature drying tunnel is a hot air circulation drying tunnel, the length of the hot air circulation drying tunnel is 1.5 M, the air outlet temperature is 260 + / -10 DEG C, the pipe body temperature of the reinforced rubber pipe at an outlet of the hot air circulation drying tunnel is 115 + / -20 DEG C, and the extrusion speed is 8 + / -2M / Min. The problem that the surrounding environment and personnel are harmed due to the fact that glue spraying is used in the extrusion process of the rubber pipe containing the reinforcing layer is solved.

Description

Technical Field

[0001] The invention belongs to the field of rubber tube processing and relates to a rubber tube extrusion process containing a reinforcement layer. Background Art

[0002] At present, during the extrusion process of rubber tubes with reinforced layers, it is necessary to spray glue on the wires to bond the inner and outer layers because of the added wire barrier in the middle. The glue may contain volatile organic compounds such as benzene, toluene, and xylene. These substances will evaporate into the air during the spraying and curing process, causing pollution to the atmospheric environment. Long-term exposure to these volatile organic compounds may also cause harm to the health of operators, such as causing neurological symptoms and chronic poisoning. Summary of the invention

[0003] The purpose of the present invention is to provide a rubber tube extrusion process containing a reinforcement layer, thereby solving the problem that the spraying of glue during the extrusion process of the rubber tube containing the reinforcement layer causes harm to the surrounding environment and personnel.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A rubber tube extrusion process containing a reinforcement layer comprises the following steps:

[0006] S1, through extrusion, cooling, and molding, an inner rubber tube is prepared;

[0007] S2, coating the outer wall of the inner rubber tube after molding with a reinforcing layer, and obtaining a reinforced rubber tube after molding;

[0008] S3. The reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction. The high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 260±10℃. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 115±20℃.

[0009] The rubber material has a certain thermoplasticity at high temperature. When the rubber tube containing the reinforcement layer is heated in a high-temperature drying oven, the rubber material begins to soften, which is conducive to the rearrangement and mutual penetration of the rubber molecular chains, making the interface between the outer tube, the reinforcement layer and the inner tube more blurred, which is conducive to the close bonding between them; therefore, the present invention uses a high-temperature drying oven to heat the reinforced rubber tube before the reinforced rubber tube enters the outer rubber extruder, and then enters the outer layer extruder, which can make the inner rubber tube, the reinforcement layer, and the outer rubber tube tightly combined, replacing the existing spray glue. There is no need to spray glue to bond the inner rubber tube, the reinforcement layer, and the outer rubber tube, solving the problem of using spray glue during the extrusion of the rubber tube containing the reinforcement layer causing harm to the surrounding environment and personnel.

[0010] Furthermore, a tube temperature detector is installed at the outlet of the hot air circulation drying tunnel;

[0011] The tube body temperature detector includes an inner tube, one end of the inner tube is connected to the outlet of the air circulation drying tunnel through a first connector, and the other end of the inner tube is connected to the inlet of the outer rubber extruder through a second connector. An infrared temperature sensor is installed on the tube wall of the inner tube, and the probe of the infrared temperature sensor passes through the tube wall of the inner tube and is located inside the inner tube. The probe of the infrared temperature sensor is in contact with the reinforced rubber tube inside the inner tube, and the infrared temperature sensor is used to detect the tube body temperature of the reinforced rubber tube.

[0012] The present invention installs a tube body temperature detector at the outlet of the hot air circulation drying tunnel, and the tube body temperature detector detects the tube body temperature of the reinforced rubber tube to ensure that the tube body temperature of the reinforced rubber tube entering the outer layer extruder reaches 115±20°C. Within this temperature range, the inner rubber tube, the reinforcement layer and the outer rubber tube can be tightly bonded.

[0013] Furthermore, an outer tube is sleeved on the outside of the inner tube, and a heat-insulating filler is filled between the outer tube and the inner tube. The infrared temperature sensor probe passes through the outer tube, the heat-insulating filler, and the inner tube from the outside to the inside in sequence and contacts the reinforced rubber tube inside the inner tube. A mounting plate with mounting holes is installed on the wall of the outer tube; the first connecting head is connected and fixed to the inner tube and the outer tube at the same time.

[0014] The heat-insulating filler prevents internal heat from being transferred to the outside, which can prevent internal heat loss on the one hand and prevent external personnel from being burned on the other hand.

[0015] Furthermore, the second joint includes a matching inner connector and an outer connector, the inner connector is simultaneously connected and fixed to the inner tube and the outer tube, the inner connector is inserted into the outer connector to achieve the connection between the inner connector and the outer connector, the outer connector is connected to the inlet of the outer rubber extruder, and the outer connector is detachably connected to the outer wall of the outer tube through a connector;

[0016] The air circulation drying tunnel, the first connector, the inner tube, the inner connector, the outer connector and the inlet of the outer rubber extruder are connected in sequence.

[0017] The inner connector and the outer connector are connected in a coordinated manner to achieve quick assembly and disassembly.

[0018] Furthermore, the connecting piece between the external connecting head and the outer wall of the outer cylinder is a lock with model number C-LD-40323, the U-shaped rod and the U-shaped rod adjustment structure of the lock are installed on the outer wall of the outer cylinder, and the hook of the lock is installed on the outer wall of the external connecting head; under the action of the U-shaped rod adjustment structure, the U-shaped rod and the hook are connected and separated; the external connecting head and the outer wall of the outer cylinder are detachably connected by the lock with model number C-LD-40323.

[0019] Furthermore, the infrared temperature sensor is installed on the probe connector; the probe connector is a vertically placed rubber T-type stage, a through hole for inserting the infrared temperature sensor is opened in the middle of the rubber T-type stage, the horizontal section of the rubber T-type stage is connected and fixed to the outer wall of the outer tube, the vertical section of the rubber T-type stage passes through the outer tube wall, the insulation filling body and the inner tube wall along the radial direction of the inner tube, the through hole in the middle of the rubber T-type stage is connected to the inside of the inner tube, the infrared temperature sensor is inserted into the through hole in the middle of the rubber T-type stage and the probe of the infrared temperature sensor is in contact with the reinforced rubber tube inside the inner tube.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. The rubber tube extrusion process containing a reinforced layer of the present invention adopts a high-temperature drying oven to heat the reinforced rubber tube before the reinforced rubber tube enters the outer rubber extruder, and then enters the outer layer extruder, so that the inner rubber tube, the reinforced layer, and the outer rubber tube are tightly combined, replacing the existing glue spraying, and there is no need to spray glue to bond the inner rubber tube, the reinforced layer, and the outer rubber tube, thereby solving the problem of using glue spraying in the extrusion process of the rubber tube containing the reinforced layer to cause harm to the surrounding environment and personnel;

[0022] 2. The present invention is provided with a tube temperature detector at the outlet of the hot air circulation drying tunnel, which detects the tube temperature of the reinforced rubber tube to ensure that the tube temperature of the reinforced rubber tube entering the outer layer extruder reaches 115±20°C. Within this temperature range, the inner rubber tube, the reinforcement layer and the outer rubber tube can be tightly bonded;

[0023] 3. The heat-insulating filler in the present invention prevents the internal heat from being transferred to the outside, which can prevent the internal heat from being lost on the one hand, and prevent external personnel from being burned on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0025] Figure 1 It is a structural schematic diagram of the tube temperature detector of the present invention;

[0026] Figure 2 yes Figure 1 A cross-sectional view at point A;

[0027] Figure 3 is a three-dimensional diagram of the tube temperature detector of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the infrared temperature measuring sensor of the present invention.

[0029] Markings in the figure: 1-inner connector, 2-inner tube, 3-first connector, 4-thermal insulation filling body, 5-probe connector, 6-infrared temperature sensor, 7-outer tube, 8-outer connector, 9-lock, 51-rubber T-type stage. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0034] Example 1

[0035] like Figure 1-Figure 4 As shown, a preferred embodiment of the present invention provides a rubber tube extrusion process containing a reinforcement layer, comprising the following steps:

[0036] S1, through extrusion, cooling, and molding, an inner rubber tube is prepared;

[0037] S2, coating the outer wall of the inner rubber tube after molding with a reinforcing layer, and obtaining a reinforced rubber tube after molding;

[0038] S3. The reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction. The high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 250°C. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 95°C.

[0039] A tube temperature detector is installed at the outlet of the hot air circulation drying tunnel;

[0040] The tube body temperature detector includes an inner tube 2, one end of the inner tube 2 is connected to the outlet of the air circulation drying tunnel through a first connector 3, and the other end of the inner tube 2 is connected to the inlet of the outer rubber extruder through a second connector. An infrared temperature sensor 6 is installed on the tube wall of the inner tube 2. The probe of the infrared temperature sensor 6 passes through the tube wall of the inner tube 2 and is located inside the inner tube 2. The probe of the infrared temperature sensor 6 is in contact with the reinforced rubber tube inside the inner tube 2. The infrared temperature sensor 6 is used to detect the tube body temperature of the reinforced rubber tube.

[0041] The outer sleeve of the inner tube 2 is provided with an outer tube 7, and the space between the outer tube 7 and the inner tube 2 is filled with a heat-insulating filler 4. The infrared temperature sensor 6 probe passes through the outer tube 7, the heat-insulating filler 4, and the inner tube 2 from the outside to the inside in sequence and contacts the reinforced rubber tube inside the inner tube 2. A mounting plate with mounting holes is installed on the wall of the outer tube 7; the first connecting head 3 is connected and fixed to the inner tube 2 and the outer tube 7 at the same time.

[0042] The second joint includes a matching inner connector 1 and an outer connector 8, wherein the inner connector 1 is connected and fixed to the inner tube 2 and the outer tube 7 at the same time, the inner connector 1 is inserted into the outer connector 8 to achieve the connection between the inner connector 1 and the outer connector 8, the outer connector 8 is connected to the inlet of the outer rubber extruder, and the outer connector 8 is detachably connected to the outer wall of the outer tube 7 through a connector;

[0043] The air circulation drying tunnel, the first connector 3, the inner tube 2, the inner connector 1, the outer connector 8 are connected in sequence with the inlet of the outer rubber extruder.

[0044] The connecting piece between the external connecting head 8 and the outer wall of the outer tube 7 is a lock buckle 9 with model number C-LD-40323. The U-shaped rod and the U-shaped rod adjustment structure of the lock buckle 9 are installed on the outer wall of the outer tube 7, and the hook of the lock buckle 9 is installed on the outer wall of the external connecting head 8; under the action of the U-shaped rod adjustment structure, the U-shaped rod and the hook are connected and separated; the external connecting head 8 and the outer wall of the outer tube 7 are detachably connected by the lock buckle 9 with model number C-LD-40323.

[0045] The infrared temperature sensor 6 is installed on the probe connector 5; the probe connector 5 is a vertically placed rubber T-shaped platform 51, and a through hole is opened in the middle of the rubber T-shaped platform 51 for inserting the infrared temperature sensor 6. The horizontal section of the rubber T-shaped platform 51 is connected and fixed to the outer wall of the outer tube 7, and the vertical section of the rubber T-shaped platform 51 passes through the wall of the outer tube 7, the insulating filling body 4 and the wall of the inner tube 2 along the radial direction of the inner tube 2. The through hole in the middle of the rubber T-shaped platform 51 is connected to the inside of the inner tube 2, and the infrared temperature sensor 6 is inserted into the through hole in the middle of the rubber T-shaped platform 51 and the probe of the infrared temperature sensor 6 is in contact with the reinforced rubber tube inside the inner tube 2.

[0046] Example 2

[0047] Based on Example 1, a rubber tube extrusion process containing a reinforcement layer provided in a preferred embodiment of the present invention comprises the following steps:

[0048] S1, through extrusion, cooling, and molding, an inner rubber tube is prepared;

[0049] S2, coating the outer wall of the inner rubber tube after molding with a reinforcing layer, and obtaining a reinforced rubber tube after molding;

[0050] S3. The reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction. The high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 260°C. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 115°C.

[0051] A tube temperature detector is installed at the outlet of the hot air circulation drying tunnel;

[0052] The tube body temperature detector includes an inner tube 2, one end of the inner tube 2 is connected to the outlet of the air circulation drying tunnel through a first connector 3, and the other end of the inner tube 2 is connected to the inlet of the outer rubber extruder through a second connector. An infrared temperature sensor 6 is installed on the tube wall of the inner tube 2. The probe of the infrared temperature sensor 6 passes through the tube wall of the inner tube 2 and is located inside the inner tube 2. The probe of the infrared temperature sensor 6 is in contact with the reinforced rubber tube inside the inner tube 2. The infrared temperature sensor 6 is used to detect the tube body temperature of the reinforced rubber tube.

[0053] The outer sleeve of the inner tube 2 is provided with an outer tube 7, and the space between the outer tube 7 and the inner tube 2 is filled with a heat-insulating filler 4. The infrared temperature sensor 6 probe passes through the outer tube 7, the heat-insulating filler 4, and the inner tube 2 from the outside to the inside in sequence and contacts the reinforced rubber tube inside the inner tube 2. A mounting plate with mounting holes is installed on the wall of the outer tube 7; the first connecting head 3 is connected and fixed to the inner tube 2 and the outer tube 7 at the same time.

[0054] The second joint includes a matching inner connector 1 and an outer connector 8, wherein the inner connector 1 is connected and fixed to the inner tube 2 and the outer tube 7 at the same time, the inner connector 1 is inserted into the outer connector 8 to achieve the connection between the inner connector 1 and the outer connector 8, the outer connector 8 is connected to the inlet of the outer rubber extruder, and the outer connector 8 is detachably connected to the outer wall of the outer tube 7 through a connector;

[0055] The air circulation drying tunnel, the first connector 3, the inner tube 2, the inner connector 1, the outer connector 8 are connected in sequence with the inlet of the outer rubber extruder.

[0056] The connecting piece between the external connecting head 8 and the outer wall of the outer tube 7 is a lock buckle 9 with model number C-LD-40323. The U-shaped rod and the U-shaped rod adjustment structure of the lock buckle 9 are installed on the outer wall of the outer tube 7, and the hook of the lock buckle 9 is installed on the outer wall of the external connecting head 8; under the action of the U-shaped rod adjustment structure, the U-shaped rod and the hook are connected and separated; the external connecting head 8 and the outer wall of the outer tube 7 are detachably connected by the lock buckle 9 with model number C-LD-40323.

[0057] The infrared temperature sensor 6 is installed on the probe connector 5; the probe connector 5 is a vertically placed rubber T-shaped platform 51, and a through hole is opened in the middle of the rubber T-shaped platform 51 for inserting the infrared temperature sensor 6. The horizontal section of the rubber T-shaped platform 51 is connected and fixed to the outer wall of the outer tube 7, and the vertical section of the rubber T-shaped platform 51 passes through the wall of the outer tube 7, the insulating filling body 4 and the wall of the inner tube 2 along the radial direction of the inner tube 2. The through hole in the middle of the rubber T-shaped platform 51 is connected to the inside of the inner tube 2, and the infrared temperature sensor 6 is inserted into the through hole in the middle of the rubber T-shaped platform 51 and the probe of the infrared temperature sensor 6 is in contact with the reinforced rubber tube inside the inner tube 2.

[0058] Example 3

[0059] Based on Example 1, a rubber tube extrusion process containing a reinforcement layer provided in a preferred embodiment of the present invention comprises the following steps:

[0060] S1, through extrusion, cooling, and molding, an inner rubber tube is prepared;

[0061] S2, coating the outer wall of the inner rubber tube after molding with a reinforcing layer, and obtaining a reinforced rubber tube after molding;

[0062] S3. The reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction. The high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 270°C. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 135°C.

[0063] A tube temperature detector is installed at the outlet of the hot air circulation drying tunnel;

[0064] The tube body temperature detector includes an inner tube 2, one end of the inner tube 2 is connected to the outlet of the air circulation drying tunnel through a first connector 3, and the other end of the inner tube 2 is connected to the inlet of the outer rubber extruder through a second connector. An infrared temperature sensor 6 is installed on the tube wall of the inner tube 2. The probe of the infrared temperature sensor 6 passes through the tube wall of the inner tube 2 and is located inside the inner tube 2. The probe of the infrared temperature sensor 6 is in contact with the reinforced rubber tube inside the inner tube 2. The infrared temperature sensor 6 is used to detect the tube body temperature of the reinforced rubber tube.

[0065] The outer sleeve of the inner tube 2 is provided with an outer tube 7, and the space between the outer tube 7 and the inner tube 2 is filled with a heat-insulating filler 4. The infrared temperature sensor 6 probe passes through the outer tube 7, the heat-insulating filler 4, and the inner tube 2 from the outside to the inside in sequence and contacts the reinforced rubber tube inside the inner tube 2. A mounting plate with mounting holes is installed on the wall of the outer tube 7; the first connecting head 3 is connected and fixed to the inner tube 2 and the outer tube 7 at the same time.

[0066] The second joint includes a matching inner connector 1 and an outer connector 8, wherein the inner connector 1 is connected and fixed to the inner tube 2 and the outer tube 7 at the same time, the inner connector 1 is inserted into the outer connector 8 to achieve the connection between the inner connector 1 and the outer connector 8, the outer connector 8 is connected to the inlet of the outer rubber extruder, and the outer connector 8 is detachably connected to the outer wall of the outer tube 7 through a connector;

[0067] The air circulation drying tunnel, the first connector 3, the inner tube 2, the inner connector 1, the outer connector 8 are connected in sequence with the inlet of the outer rubber extruder.

[0068] The connecting piece between the external connecting head 8 and the outer wall of the outer tube 7 is a lock buckle 9 with model number C-LD-40323. The U-shaped rod and the U-shaped rod adjustment structure of the lock buckle 9 are installed on the outer wall of the outer tube 7, and the hook of the lock buckle 9 is installed on the outer wall of the external connecting head 8; under the action of the U-shaped rod adjustment structure, the U-shaped rod and the hook are connected and separated; the external connecting head 8 and the outer wall of the outer tube 7 are detachably connected by the lock buckle 9 with model number C-LD-40323.

[0069] The infrared temperature sensor 6 is installed on the probe connector 5; the probe connector 5 is a vertically placed rubber T-shaped platform 51, and a through hole is opened in the middle of the rubber T-shaped platform 51 for inserting the infrared temperature sensor 6. The horizontal section of the rubber T-shaped platform 51 is connected and fixed to the outer wall of the outer tube 7, and the vertical section of the rubber T-shaped platform 51 passes through the wall of the outer tube 7, the insulating filling body 4 and the wall of the inner tube 2 along the radial direction of the inner tube 2. The through hole in the middle of the rubber T-shaped platform 51 is connected to the inside of the inner tube 2, and the infrared temperature sensor 6 is inserted into the through hole in the middle of the rubber T-shaped platform 51 and the probe of the infrared temperature sensor 6 is in contact with the reinforced rubber tube inside the inner tube 2.

[0070] Comparative Example 1

[0071] Based on Example 1, the difference from Example 1 is that: S3, the reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction; the high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 240°C. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 75°C.

[0072] Comparative Example 2

[0073] Based on Example 1, the difference from Example 1 is that: S3, the reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction; the high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 280°C. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 155°C.

[0074] Test Example 1

[0075] Detect the concentration of volatile organic compounds (VOC) in the surrounding environment of the entire device in mg / m 3 The detection equipment is an organic matter VOC detector, and the detection method is the prior art. The detection results of Examples 1-3 and Comparative Examples 1-2 are shown in Table 1. The reinforcement layer in the reinforced rubber tube is a steel wire braided layer.

[0076] Table 1 VOC concentration test results

[0077]

[0078]

[0079] The VOC concentration emitted during the rubber tube preparation process of the present invention is low.

[0080] Test Example 2

[0081] The bonding strength between each layer of the reinforced rubber hose prepared in Examples 1-3 and Comparative Examples 1-2 was tested according to the national standard GB / T 14905-2009 for the determination of bonding strength between layers of rubber and plastic hoses. The reinforcement layer in the reinforced rubber hose is a steel wire braided layer. The test results are shown in Table 2, and the unit of bonding strength is kN / m.

[0082] Table 2 Bond strength test results between each layer

[0083] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Inner layer and reinforcement layer >2.5 >2.5 >2.5 <2.5 <2.5 Outer layer and reinforcement layer >2.5 >2.5 >2.5 <2.5 <2.5

[0084] Referring to the prior art, for a steel wire braided reinforced rubber hose, when the bonding strength between the inner lining layer and the reinforcement layer and between the outer covering layer and the reinforcement layer is not less than 2.5 kN / m, it means that the layers have good bonding strength and meet the use requirements. In the present invention, if the temperature is too low, the rubber is not heated enough, and the middle reinforcement layer cannot be tightly bonded to the inner and outer layers; if the temperature is too high, the rubber has obvious fluidity, which affects the molding of the rubber tube, and the thickness of the pipe is prone to unevenness, which also reduces the bonding strength between the reinforcement layer and the inner and outer layers.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rubber tube extrusion process containing a reinforcement layer, characterized in that: The following steps are involved: S1, through extrusion, cooling, and molding, an inner rubber tube is prepared; S2, coating the outer wall of the inner rubber tube after molding with a reinforcing layer, and obtaining a reinforced rubber tube after molding; S3. The reinforced rubber tube passes through a high-temperature drying oven and enters an outer rubber extruder to be wrapped with an outer rubber tube. After cooling and molding, a rubber tube containing a reinforced layer is obtained. The rubber tube containing a reinforced layer includes an inner rubber tube, a reinforced layer, and an outer rubber tube in sequence along its radial direction. The high-temperature drying oven is a hot air circulation drying oven, and the air outlet temperature of the hot air circulation drying oven is 260±10℃. The tube body temperature of the reinforced rubber tube at the outlet of the hot air circulation drying oven is 115±20℃.

2. A rubber tube extrusion process containing a reinforcement layer according to claim 1, characterized in that: A tube temperature detector is installed at the outlet of the hot air circulation drying tunnel; The tube body temperature detector comprises an inner tube (2), one end of the inner tube (2) is connected to the outlet of the air circulation drying tunnel through a first connector (3), and the other end of the inner tube (2) is connected to the inlet of the outer rubber extruder through a second connector. An infrared temperature sensor (6) is installed on the tube wall of the inner tube (2), the probe of the infrared temperature sensor (6) passes through the tube wall of the inner tube (2) and is located inside the inner tube (2), and the probe of the infrared temperature sensor (6) is in contact with the reinforced rubber tube inside the inner tube (2), and the infrared temperature sensor (6) is used to detect the tube body temperature of the reinforced rubber tube.

3. A rubber tube extrusion process containing a reinforcement layer according to claim 2, characterized in that: The outer tube (2) is sleeved with an outer tube (7), and a heat insulating filler (4) is filled between the outer tube (7) and the inner tube (2). The infrared temperature sensor (6) probe passes through the outer tube (7), the heat insulating filler (4), and the inner tube (2) from the outside to the inside in sequence and contacts the reinforced rubber tube inside the inner tube (2). A mounting plate with mounting holes is installed on the wall of the outer tube (7); the first connector (3) is simultaneously connected and fixed to the inner tube (2) and the outer tube (7).

4. A rubber tube extrusion process containing a reinforcement layer according to claim 3, characterized in that: The second joint comprises a matching inner connector (1) and an outer connector (8); the inner connector (1) is simultaneously connected and fixed to the inner tube (2) and the outer tube (7); the inner connector (1) is inserted into the outer connector (8) to achieve communication between the inner connector (1) and the outer connector (8); the outer connector (8) is connected to the inlet of the outer rubber extruder; and the outer connector (8) is detachably connected to the outer wall of the outer tube (7) via a connector; The air circulation drying tunnel, the first connector (3), the inner tube (2), the inner connector (1), the outer connector (8) are connected in sequence to the inlet of the external rubber extruder.

5. A rubber tube extrusion process containing a reinforcement layer according to claim 4, characterized in that: The connecting piece between the external connector (8) and the outer wall of the outer cylinder (7) is a lock buckle (9) with a model number of C-LD-40323; the U-shaped rod and the U-shaped rod adjustment structure of the lock buckle (9) are installed on the outer wall of the outer cylinder (7); the hook of the lock buckle (9) is installed on the outer wall of the external connector (8); under the action of the U-shaped rod adjustment structure, the U-shaped rod and the hook are connected and separated; the external connector (8) and the outer wall of the outer cylinder (7) are detachably connected through the lock buckle (9) with a model number of C-LD-40323.

6. A rubber tube extrusion process containing a reinforcement layer according to claim 3, characterized in that: The infrared temperature sensor (6) is mounted on the probe connector (5); the probe connector (5) is a vertically placed rubber T-shaped platform (51); a through hole is provided in the middle of the rubber T-shaped platform (51) for inserting the infrared temperature sensor (6); the horizontal section of the rubber T-shaped platform (51) is connected and fixed to the outer wall of the outer tube (7); the vertical section of the rubber T-shaped platform (51) passes through the wall of the outer tube (7), the heat insulating filling body (4) and the wall of the inner tube (2) along the radial direction of the inner tube (2); the through hole in the middle of the rubber T-shaped platform (51) is connected to the inside of the inner tube (2); the infrared temperature sensor (6) is inserted into the through hole in the middle of the rubber T-shaped platform (51) and the probe of the infrared temperature sensor (6) contacts the reinforced rubber tube inside the inner tube (2).

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