Preheating device for polyurethane production auxiliaries

Abstract

The utility model discloses a polyurethane production auxiliary agent preheating device, which relates to the technical field of polyurethane production auxiliary equipment, and comprises a table frame, an auxiliary agent preheating and containing mechanism, an auxiliary agent adding assembly, a nitrogen injection assembly, a stirring mechanism and a heating oil circulation heating mechanism, the auxiliary preheating and containing mechanism comprises heating tanks, the heating tanks are installed on the tops of the tank frames respectively, and internal observation assemblies are installed in the middles of the front sides of the heating tanks. According to the polyurethane production auxiliary agent preheating device, heating oil is added into the heating box, the heated heating oil circularly enters the heating interlayer to heat an auxiliary agent in the heating tanks, the nitrogen injection assembly is arranged, nitrogen can be fed into the top in the heating tanks before heating, the auxiliary agent is prevented from reacting with oxygen in air, the two heating tanks are arranged, and the heating efficiency is improved. The auxiliary agents can be alternately heated, so that the stable supply of the auxiliary agents is maintained in the polyurethane production process.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for polyurethane production, specifically a preheating device for polyurethane production additives. Background Technology

[0002] Various additives are added during the polyurethane production process. These additives need to be preheated before use. Due to the special properties of some additives, they are not suitable for direct heating with a heater. Furthermore, if air is present inside the additives during heating, the additives are prone to react with oxygen in the air, which will affect the properties of the additives. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a preheating device for polyurethane production additives. Heating oil is added to the heating chamber, and the heated oil circulates into the heating jacket to heat the additives inside the heating tank. The additives experience stable temperature rise and good heating effect. Furthermore, a nitrogen injection component is provided to introduce nitrogen into the top of the heating tank before heating, preventing the additives from reacting with oxygen in the air and maintaining their original properties after heating. Two heating tanks are provided, which can be used alternately to heat the additives, maintaining a stable supply of additives during polyurethane production. This effectively solves the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a preheating device for polyurethane production additives, including a table frame, with two tank racks mounted on the top of the table frame, and further comprising:

[0005] The additive preheating and holding mechanism includes a heating tank, an internal observation component, a tank cover, an additive product outlet, and a discharge valve. A heating tank is installed on the top of each tank rack. An internal observation component is installed in the middle of the front side of the heating tank. A tank cover is installed on the opening at the top of the heating tank through a tank cover fixing device. An additive product outlet is provided at the center of the bottom of the heating tank, and a discharge valve is installed on the additive product outlet.

[0006] Additive addition component, installed on the can lid;

[0007] Nitrogen injection assembly, installed on the tank lid;

[0008] The stirring mechanism is installed in the middle of the tank lid;

[0009] The heating oil circulation heating mechanism is connected to the heating tank.

[0010] The table frame supports the tank rack, which keeps the heating tank away from the top of the table frame. This facilitates the placement of the additive product outlet and discharge valve at the bottom of the heating tank. The additive addition component allows for easy addition of the additive to be heated into the heating tank. Before heating, a nitrogen injection component introduces external nitrogen into the heating tank, helping to expel air from the top of the tank and reduce the oxygen content, preventing oxygen from affecting the properties of the additive. The heating oil circulation heating mechanism heats the tank, thereby heating the additives inside. During heating, a stirring mechanism agitates the additives, promoting uniform heating. The discharge valve opens, allowing the heated additives to exit through the additive product outlet. An internal observation component allows for monitoring the state of the additives within the heating tank during heating. A can lid fixing device secures the can lid to the top of the heating tank. When the heating tank needs to be opened, the can lid can be loosened and removed using the can lid fixing device.

[0011] Furthermore, the internal observation assembly includes a side pipe, a threaded sleeve, and a transparent observation window. One end of the side pipe is connected to the middle of the front side of the heating tank, and the other end of the side pipe is fitted with a transparent observation window via a threaded sleeve. The threaded sleeve is used to install the transparent observation window at the end of the side pipe, allowing observation of the state of the additives inside the heating tank through the transparent observation window and the interior of the side pipe.

[0012] Furthermore, the can lid fixing device includes a swing column moving assembly, a swing column, a fixing nut, a control ring, and grooves. Four grooves are arranged in a circular array on the outer periphery of the top of the heating tank. A notch is formed on the outer periphery of the can lid corresponding to the groove positions. The bottom end of the swing column is movably connected to the outer side of the heating tank at the bottom of each groove via the swing column moving assembly. The top end of the swing column passes through the corresponding groove and notch and is threadedly connected to the fixing nut. The top of the fixing nut is fixedly connected to the control ring. When the can lid needs to be removed, the control ring is used to loosen the fixing nut, causing it to move away from the upper edge of the can lid. The swing column is then moved outwards, disengaging from the groove and notch, allowing the can lid to be removed. When the can lid needs to be re-fixed, the swing column is swung towards the heating tank, returning to the groove and notch. The control ring is then used to tighten the fixing nut, pressing the bottom of the fixing nut against the upper edge of the can lid, thus re-fixing the can lid.

[0013] Furthermore, the swing column movable assembly includes a movable seat, a movable shaft, a limiting nut, and a collar. A movable seat is positioned at the bottom of each groove on the outer side of the heating tank. The movable seat is rotatably connected to the movable shaft, and two limiting nuts are threaded to both ends of the movable shaft. A collar is rotatably fitted onto the middle of the movable shaft, and the collar is fixedly connected to the bottom end of the swing column. The limiting nuts prevent the movable shaft from disengaging from the movable seat. The cooperation between the movable shaft and the collar allows the swing column to swing around the movable shaft, achieving the purpose of movable connection between the swing column and the heating tank.

[0014] Furthermore, the additive addition assembly includes an addition pipe, a pipe cap, and a clamp. The addition pipe is inserted through the top of the tank cap, and the pipe cap is installed at the top of the addition pipe via the clamp. When additives are not needed to be added through the addition pipe, the pipe cap is fixed to the top of the addition pipe with the clamp, thus sealing the top of the addition pipe. When additives need to be added, the pipe cap and clamp are removed, and the additives can be fed into the heating tank through the addition pipe.

[0015] Furthermore, the nitrogen injection assembly includes an injection vertical pipe, an addition horizontal pipe, and gas valves. The injection vertical pipe is inserted through the top of the tank cover, and the top of the injection vertical pipe is fixedly connected to the middle of the addition horizontal pipe. Two gas valves are installed at each end of the addition horizontal pipe. By opening the gas valves and connecting the end of the addition horizontal pipe to an external nitrogen tank, nitrogen from the external nitrogen tank can be introduced into the heating tank, reducing the air content at the top of the heating tank and preventing oxygen in the air from affecting the properties of the additives.

[0016] Furthermore, the heating oil circulation heating mechanism includes a heating jacket, an oil drain pipe, a liquid pump, a heating chamber, a heater, and an oil inlet pipe. The heating chamber is installed on the top of the table frame, and the heater is installed inside the heating chamber. A heating jacket is provided on the side wall of the heating tank. One end of the oil drain pipe is connected to the middle of the heating jacket, and the other end of the oil drain pipe is connected to the inlet of the liquid pump. The outlet of the liquid pump is connected to one side of the heating chamber, and the other side of the heating chamber is connected to one end of the oil inlet pipe. The other end of the oil inlet pipe is connected to the bottom of the heating jacket. Heating oil is filled into the heating chamber, and the heater heats the heating oil in the heating chamber. The liquid pump sends the heating oil from the heating jacket into the heating chamber through the oil drain pipe. As the amount of heating oil in the heating chamber increases, the increased heating oil is sent back into the heating jacket through the oil inlet pipe, thus realizing the circulation of heating oil. The temperature of the heating oil is used to heat the additives in the heating tank. The heating oil, as a heating medium, has stable heat conduction, providing stable heating of the additives and resulting in good heating effect.

[0017] Compared with existing technologies, the advantages of this polyurethane production additive preheating device are:

[0018] 1. This preheating device for polyurethane production additives includes a heating chamber filled with heating oil, a heater that heats the heating oil in the heating chamber, and a liquid pump that sends the heating oil from the heating jacket into the heating chamber through an oil drain pipe. As the amount of heating oil in the heating chamber increases, the increased heating oil is sent into the heating jacket through an oil inlet pipe, thus realizing the circulation of heating oil. The temperature of the heating oil is used to heat the additives in the heating tank. The heating oil, as a heating medium, has stable heat conduction, provides stable heating of the additives, and has a good heating effect.

[0019] 2. The preheating device for polyurethane production additives is equipped with a nitrogen injection component, which can introduce nitrogen into the top of the heating tank before heating to prevent the additives from reacting with oxygen in the air and to maintain the original properties of the additives after heating.

[0020] 3. The preheating device for polyurethane production additives is equipped with two heating tanks, which can be used alternately to heat the additives, maintaining a stable supply of additives during the polyurethane production process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a partial structural schematic diagram of the present invention;

[0023] Figure 3 This is a top view of the structure of this utility model;

[0024] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure at point A in the middle;

[0025] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0026] In the diagram: 1. Table frame, 2. Tank rack, 21. Support leg, 22. Annular seat, 3. Additive preheating and holding mechanism, 31. Heating tank, 32. Side pipe, 33. Screw sleeve, 34. Transparent observation window, 35. Tank lid, 36. Additive product outlet, 37. Discharge valve, 38. Temperature control probe, 4. Tank lid fixing device, 41. Movable seat, 42. Movable shaft, 43. Limit nut, 44. Collar, 45. Swing column, 46. Fixing nut, 47. Control ring, 48. Groove, 5. Additive adding component, 51. Addition pipe, 52. Pipe cover, 53. Clamp, 6. Nitrogen injection component, 61. Injection vertical pipe, 62. Addition horizontal pipe, 63. Gas valve, 7. Stirring mechanism, 71. Gear motor, 72. Stirring shaft, 73. Stirring rod, 8. Heating oil circulation heating mechanism, 81. Heating jacket, 82. Oil drain pipe, 83. Liquid pump, 84. Heating box, 85. Heater, 86. Oil inlet pipe, 87. Discharge pipe, 88. Control valve, 9. Control box. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1, please refer to Figures 1 to 5 The present invention provides a technical solution: a preheating device for polyurethane production additives, including a table frame 1, two tank racks 2 installed on the top of the table frame 1, and also including an additive preheating and holding mechanism 3, an additive adding component 5, a nitrogen injection component 6 and a stirring mechanism 7.

[0029] The additive preheating and holding mechanism 3 includes a heating tank 31, an internal observation component, a tank cover 35, an additive product outlet 36, and a discharge valve 37. Each tank rack 2 has a heating tank 31 installed on its top. An internal observation component is installed in the middle of the front side of the heating tank 31. The opening at the top of the heating tank 31 is fitted with a tank cover 35 through a tank cover fixing device 4. An additive product outlet 36 is provided at the bottom center of the heating tank 31. A discharge valve 37 is installed on the additive product outlet 36.

[0030] The internal observation assembly includes a side pipe 32, a threaded sleeve 33, and a transparent observation window 34. One end of the side pipe 32 is connected to the middle of the front side of the heating tank 31, and the other end of the side pipe 32 is fitted with the transparent observation window 34 via the threaded sleeve 33. The threaded sleeve 33 is used to install the transparent observation window 34 at the end of the side pipe 32, allowing the state of the additives inside the heating tank 31 to be observed through the transparent observation window 34 and the interior of the side pipe 32.

[0031] The additive preheating and holding mechanism 3 also includes a temperature control probe 38. The temperature control probe 38 is installed at the bottom of the heating tank 31, and the temperature of the heating tank 31 can be sensed by means of the temperature control probe 38.

[0032] The tank rack 2 includes support legs 21 and annular seat 22. The bottom of the heating tank 31 is equipped with an annular seat 22, and the bottom of the annular seat 22 is fixed to the top of the table frame 1 by three support legs 21.

[0033] Additive addition component 5 is installed on can lid 35;

[0034] The additive addition assembly 5 includes an addition pipe 51, a pipe cap 52, and a clamp 53. The addition pipe 51 is inserted through the top of the tank cover 35, and the pipe cap 52 is installed on the top of the addition pipe 51 via the clamp 53. When additives are not needed to be added through the addition pipe 51, the pipe cap 52 is fixed to the top of the addition pipe 51 by the clamp 53, thus sealing the top of the addition pipe 51. When additives need to be added, the pipe cap 52 and the clamp 53 are removed, and the additives can be fed into the heating tank 31 through the addition pipe 51.

[0035] Nitrogen injection assembly 6 is installed on tank cover 35;

[0036] The nitrogen injection assembly 6 includes an injection vertical pipe 61, an addition horizontal pipe 62, and gas valves 63. The injection vertical pipe 61 is inserted through the top of the tank cover 35. The top of the injection vertical pipe 61 is fixedly connected to the middle of the addition horizontal pipe 62. Two gas valves 63 are installed at each end of the addition horizontal pipe 62. By opening the gas valves 63 and connecting the end of the addition horizontal pipe 62 to an external nitrogen tank, nitrogen from the external nitrogen tank can be introduced into the heating tank 31, reducing the air content at the top of the heating tank 31 and preventing oxygen in the air from affecting the properties of the additives.

[0037] The stirring mechanism 7 is installed in the middle of the tank cover 35;

[0038] The stirring mechanism 7 includes a geared motor 71, a stirring shaft 72, and a stirring rod 73. The middle part of the tank cover 35 is rotatably connected to the vertical stirring shaft 72 via a bearing. The top end of the stirring shaft 72 is fixedly connected to the output shaft of the geared motor 71. The geared motor 71 is mounted on the tank cover 35. The bottom end of the stirring shaft 72 extends into the heating tank 31, and the stirring rod 73 is provided on the stirring shaft 72. When the geared motor 71 works, it drives the stirring shaft 72 and the stirring rod 73 to stir the additives contained in the heating tank 31, so that the heating of the additives is more uniform.

[0039] The heating oil circulation heating mechanism 8 is connected to the heating tank 31.

[0040] The heating oil circulation heating mechanism 8 includes a heating jacket 81, an oil drain pipe 82, a liquid pump 83, a heating box 84, a heater 85, and an oil inlet pipe 86. The heating box 84 is installed on the top of the table frame 1, and the heater 85 is installed inside the heating box 84. The heating jacket 81 is provided on the side wall of the heating tank 31. One end of the oil drain pipe 82 is connected to the middle of the heating jacket 81. The other end of the oil drain pipe 82 is connected to the inlet of the liquid pump 83. The outlet of the liquid pump 83 is connected to one side of the heating box 84. One end of the oil inlet pipe 86 is connected to the other side of the heating box 84. The other end of the oil inlet pipe 86 is connected to the bottom of the heating jacket 81. Heating oil is filled into the heating chamber 84, and the heater 85 heats the heating oil in the heating chamber 84. The liquid pump 83 sends the heating oil in the heating jacket 81 into the heating chamber 84 through the oil discharge pipe 82. The heating oil in the heating chamber 84 increases, and the increased heating oil is sent into the heating jacket 81 through the oil inlet pipe 86, thereby realizing the circulation of heating oil. The temperature of the heating oil is used to heat the additives in the heating tank 31. The heating oil, as a heating medium, has stable heat conduction, provides stable heating of the additives, and has a good heating effect.

[0041] The heating oil circulation heating mechanism 8 also includes a drain 87 and a control valve 88. The bottom of the heating jacket 81 is connected to the top of the drain 87. The drain 87 is equipped with a control valve 88. If it is necessary to drain the heating oil in the heating jacket 81, the control valve 88 is opened and the heating oil in the heating jacket 81 can be completely drained through the drain 87.

[0042] In use, the table frame 1 supports the tank rack 2. The arrangement of the tank rack 2 keeps the heating tank 31 away from the top surface of the table frame 1, facilitating the placement of the additive product outlet 36 and discharge valve 37 at the bottom of the heating tank 31. The additives to be heated are easily added to the heating tank 31 using the additive addition component 5. Before heating, nitrogen gas is introduced into the heating tank 31 via the nitrogen injection component 6, which helps to expel air from the top of the heating tank 31, reducing the oxygen content at the top and preventing oxygen from affecting the properties of the additives. Heating oil is used for circulating heating. Mechanism 8 can heat the heating tank 31, thereby heating the additives contained in the heating tank 31. During the heating process, stirring mechanism 7 stirs the additives contained in the heating tank 31 to promote the uniformity of heating. The discharge valve 37 is opened, and the heated additives are discharged through the additive product outlet 36. The internal observation component allows for easy observation of the state of the additives in the heating tank 31 during the heating process. The can lid fixing device 4 is used to fix the can lid 35 to the top of the heating tank 31. When it is necessary to open the heating tank 31, the can lid 35 can be loosened and removed with the help of the can lid fixing device 4.

[0043] Example 2, please refer to Figures 1 to 5 This utility model provides a technical solution: a preheating device for polyurethane production additives. This embodiment is a further explanation of the structure of Embodiment 1.

[0044] The can lid fixing device 4 includes a swing column moving assembly, a swing column 45, a fixing nut 46, a control ring 47, and a groove 48. Four grooves 48 are arranged in a ring array on the outer periphery of the top of the heating tank 31. A notch is provided on the outer periphery of the can lid 35 corresponding to the position of the groove 48. The bottom end of the swing column 45 is movably connected to the outer side of the heating tank 31 at the bottom of each groove 48 through the swing column moving assembly. The top end of the swing column 45 passes through the corresponding groove 48 and the notch and is threadedly connected to the fixing nut 46. The top of the fixing nut 46 is fixedly connected to the control ring 47. When the can lid 35 needs to be removed, loosen the fixing nut 46 with the help of the control ring 47. The fixing nut 46 moves away from the upper edge of the can lid 35. Move the swing column 45 outward so that the swing column 45 moves away from the groove 48 and the notch. At this time, the can lid 35 can be removed. When the can lid 35 needs to be re-fixed, swing the swing column 45 toward the heating tank 31 so that the swing column 45 is back in the groove 48 and the notch. At this time, tighten the fixing nut 46 with the control ring 47 so that the bottom of the fixing nut 46 presses against the upper edge of the can lid 35 to re-fix the can lid 35.

[0045] The swing column assembly includes a movable seat 41, a movable shaft 42, a limiting nut 43, and a collar 44. A movable seat 41 is located at the bottom of each groove 48 on the outer side of the heating tank 31. The movable seat 41 is rotatably connected to the movable shaft 42, which is distributed tangentially along the outer periphery of the heating tank 31. Two limiting nuts 43 are threaded to both ends of the movable shaft 42. A collar 44 is rotatably fitted onto the middle of the movable shaft 42, and the collar 44 is fixedly connected to the bottom end of the swing column 45. The limiting nuts 43 prevent the movable shaft 42 from disengaging from the movable seat 41. The cooperation of the movable shaft 42 and the collar 44 allows the swing column 45 to swing around the movable shaft 42, achieving the purpose of movably connecting the swing column 45 to the heating tank 31.

[0046] It is worth noting that a control box 9 is installed on the table frame 1, and a PLC controller is installed on the control box 9. The geared motor 71, heater 85 and liquid pump 83 disclosed in the above embodiments are all controlled by the PLC controller on the control box 9. The PLC controller controls the heater 85 to work according to the electrical signal of the measured temperature fed back by the temperature control probe 38. The control method adopts the method commonly used in the prior art.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preheating device for polyurethane production additives, comprising a table frame (1), wherein two tank racks (2) are mounted on the top of the table frame (1), characterized in that, Also includes: The additive preheating and holding mechanism (3) includes a heating tank (31), an internal observation component, a can lid (35), an additive product outlet (36), and a discharge valve (37). Each can rack (2) has a heating tank (31) installed on its top. The heating tank (31) has an internal observation component installed in the middle of its front side. The opening at the top of the heating tank (31) is fitted with a can lid (35) through a can lid fixing device (4). The bottom center of the heating tank (31) has an additive product outlet (36), and a discharge valve (37) is installed on the additive product outlet (36). Additive addition component (5) is installed on can lid (35); Nitrogen injection assembly (6) is installed on tank cover (35); A stirring mechanism (7) is installed in the middle of the tank lid (35); The heating oil circulation heating mechanism (8) is connected to the heating tank (31).

2. The polyurethane production auxiliary agent preheating device according to claim 1, characterized in that: The internal observation assembly includes a side pipe (32), a screw sleeve (33) and a transparent observation window (34). The front middle part of the heating tank (31) is connected to one end of the side pipe (32), and the other end of the side pipe (32) is fitted with a transparent observation window (34) through the screw sleeve (33).

3. The polyurethane production auxiliary agent preheating device according to claim 1, characterized in that: The can lid fixing device (4) includes a swing column moving assembly, a swing column (45), a fixing nut (46), a control ring (47), and a groove (48). The heating tank (31) has four grooves (48) arranged in a ring array on the outer periphery of the top. The can lid (35) has a notch on the outer periphery corresponding to the groove (48). The bottom end of the swing column (45) is movably connected to the outer side of the heating tank (31) at the bottom end of each groove (48) through the swing column moving assembly. The top end of the swing column (45) passes through the corresponding groove (48) and the notch and is threadedly connected to the fixing nut (46). The top of the fixing nut (46) is fixedly connected to the control ring (47).

4. The preheating device for polyurethane production additives according to claim 3, characterized in that: The movable component of the swing column includes a movable seat (41), a movable shaft (42), a limiting nut (43), and a collar (44). The movable seat (41) is provided at the bottom of each groove (48) on the outside of the heating tank (31). The movable seat (41) is rotatably connected to the movable shaft (42). Two limiting nuts (43) are threaded to both ends of the movable shaft (42). The collar (44) is rotatably sleeved in the middle of the movable shaft (42). The collar (44) is fixedly connected to the bottom end of the swing column (45).

5. The preheating device for polyurethane production additives according to claim 1, characterized in that: The additive addition component (5) includes an addition pipe (51), a pipe cover (52) and a clamp (53). The top of the can cover (35) is provided with an addition pipe (51), and the top of the addition pipe (51) is fitted with a pipe cover (52) by a clamp (53).

6. The preheating device for polyurethane production additives according to claim 1, characterized in that: The nitrogen injection assembly (6) includes an injection vertical pipe (61), an addition horizontal pipe (62), and a gas valve (63). The injection vertical pipe (61) is inserted through the top of the can cover (35). The top of the injection vertical pipe (61) is fixedly connected to the middle of the addition horizontal pipe (62). Two gas valves (63) are installed at both ends of the addition horizontal pipe (62).

7. The polyurethane production auxiliary agent preheating device according to claim 1, characterized in that: The heating oil circulation heating mechanism (8) includes a heating jacket (81), an oil drain pipe (82), a liquid pump (83), a heating box (84), a heater (85), and an oil inlet pipe (86). The heating box (84) is installed on the top of the table frame (1), and the heater (85) is installed inside the heating box (84). The heating jacket (81) is provided on the side wall of the heating tank (31). The middle part of the heating jacket (81) is connected to one end of the oil drain pipe (82), and the other end of the oil drain pipe (82) is connected to the inlet of the liquid pump (83). The outlet of the liquid pump (83) is connected to one side of the heating box (84), and the other side of the heating box (84) is connected to one end of the oil inlet pipe (86). The other end of the oil inlet pipe (86) is connected to the bottom of the heating jacket (81).

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