Reaction kettle capable of accurately controlling feeding amount of raw materials

Abstract

The utility model discloses a reaction kettle capable of accurately controlling the feeding amount of raw materials, which comprises a kettle body, a feeding hole and a discharging hole are formed in the kettle body, a feeding pump is arranged on the outer side of the kettle body, and the feeding pump is connected with the feeding hole through a conveying pipe; the feeding port is located in the upper side of the kettle body, the connecting end of the conveying pipe and the feeding port is located above the feeding port, the outer diameter of the connecting end of the conveying pipe and the feeding port is smaller than the inner diameter of the upper end of the feeding port, a pipeline connecting mechanism is further arranged between the conveying pipe and the feeding port, and a lifting mechanism for driving the conveying pipe to move up and down is installed below the conveying pipe. According to the reaction kettle capable of accurately controlling the feeding amount of the raw materials, the conveying pipe and the kettle body are separated in weight through the matching of the lifting mechanism and the pipeline connecting mechanism, the weighing mechanism cannot weigh the conveying pipe and participating materials in the conveying pipe, so that the reaction kettle is not influenced by residual materials in the conveying pipe, the overall metering is more accurate, and the feeding amount of the raw materials can be accurately controlled. And the product quality is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for accurately controlling the feeding amount of raw materials. Background Art

[0002] In the production of automotive-related systems, isocyanate is generally put into the kettle under negative pressure first. After the feeding is completed, raw materials such as polyether polyol are put into the kettle through a feeding pump. During the feeding process, it is necessary to accurately control the feeding amount of the raw materials, otherwise it will have a great impact on the product quality.

[0003] Existing reaction kettles generally measure raw materials by means of a flow meter, a dropping tank or directly calculating the weight change of the reaction kettle. However, it is still difficult to detect the residue of raw materials in the conveying pipeline by using a flow meter and a dropping tank, and the measurement accuracy is greatly affected by the raw material residue. If the weight change of the reaction kettle is directly calculated, since the feeding pipeline is directly connected to the reaction kettle, when the raw materials remain in the pipeline, they are easily recorded in the feeding weight, and the influence of pipeline residue on the measurement still cannot be solved, and the error is difficult to control, which will indirectly cause deviation in the product quality.

[0004] Therefore, in combination with the above existing technical problems, it is necessary to provide a new technical solution. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a reaction kettle for accurately controlling the feeding amount of raw materials with more accurate measurement and less influence of pipeline residue on the measurement result.

[0006] To solve the above technical problems, the utility model provides a reaction kettle for accurately controlling the feeding amount of raw materials, and the specific technical solution is as follows:

[0007] A reaction kettle for accurately controlling the feeding amount of raw materials includes a kettle body. An inlet and an outlet are provided on the kettle body. A feeding pump is arranged outside the kettle body, and the feeding pump is connected to the inlet through a feeding pipe. The inlet is located on the upper side of the kettle body, and the connecting end of the feeding pipe and the inlet is located above the inlet and the outer diameter of the connecting end of the feeding pipe and the inlet is smaller than the inner diameter of the upper end of the inlet. A pipeline connecting mechanism is also arranged between the feeding pipe and the inlet. A lifting mechanism for driving the feeding pipe to move up and down is installed below the feeding pipe. When the lifting mechanism drives the feeding pipe to move, the pipeline connecting mechanism limits the feeding pipe to prevent the feeding pipe from slipping off the inlet. A weighing mechanism for monitoring the weight inside the kettle body is installed below the kettle body, and a quick-break valve electrically connected to the weighing mechanism is arranged near the inlet of the feeding pipe.

[0008] Preferably, a limiting ring is provided on the outer side of the connection end of the material conveying pipe and the feeding port. The feeding port extends towards the outside of the kettle body. The pipeline connection mechanism includes an installation part with a fixed ring provided on the outside of the feeding port. Along the outer edge of the feeding port, a raised seat is fixedly arranged on the installation part. A ring-shaped limiting disc is detachably installed at one end of the raised seat away from the installation part. When the material conveying pipe is connected to the feeding port, the limiting ring is located between the limiting disc and the outer end of the feeding port.

[0009] Preferably, the limiting disc is assembled by two semi-circular plates. The outer diameter of the material conveying pipe is smaller than the inner diameter of the feeding port, and the outer diameter of the limiting ring is larger than the inner diameters of the feeding port and the limiting disc.

[0010] Preferably, the lifting mechanism includes a bearing plate and a jacking part located below the bearing plate. The material conveying pipe is fixed on the bearing plate through a bracket.

[0011] Preferably, the jacking part specifically adopts a telescopic rod driven by a screw or an oil cylinder. The stroke of the jacking part does not exceed the difference between the distance from the outer end of the feeding port to the limiting disc and the thickness of the limiting ring.

[0012] Preferably, the feeding pump is also fixed on the bearing plate, and the feeding pump and the material conveying pipe remain relatively fixed.

[0013] Preferably, a stirring blade is installed in the kettle body, and a driving motor is provided outside the kettle body. The stirring blade is connected to the driving motor and is driven by the driving motor to rotate.

[0014] A reaction kettle for precisely controlling the raw material feeding amount of the present utility model has the following beneficial effects:

[0015] For the reaction kettle for precisely controlling the raw material feeding amount of the present utility model, through the cooperation of the lifting mechanism and the pipeline connection mechanism, the material conveying pipe and the kettle body are separated in terms of weight. The weighing mechanism does not weigh the material conveying pipe and the raw materials in the material conveying pipe, and thus is not affected by the residual materials in the material conveying pipe. The overall measurement is more accurate, and the product quality is also higher.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1It is a schematic structural diagram of a reactor for precisely controlling the feeding amount of raw materials;

[0019] Figure 2 It is Figure 1 an enlarged schematic diagram of part A in

[0020] Among them, 1 - reactor body; 11 - stirring blade; 12 - driving motor; 13 - feeding port; 14 - discharging port; 2 - feeding pump; 3 - conveying pipe; 31 - quick-break valve; 32 - limiting ring; 4 - pipeline connection mechanism; 41 - installation part; 42 - heightening seat; 43 - limiting disc; 5 - weighing mechanism; 6 - lifting mechanism; 61 - bearing plate; 62 - jacking part. Specific embodiments

[0021] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0022] Embodiment

[0023] Please refer to Figures 1 to 2 , a reactor for precisely controlling the feeding amount of raw materials, including a reactor body 1. A feeding port 13 and a discharging port 14 are provided on the reactor body 1. A feeding pump 2 is provided outside the reactor body. The feeding pump and the feeding port 13 are connected through a conveying pipe 3. The feeding port is located on the upper side of the reactor body. The connecting end of the conveying pipe and the feeding port is located above the feeding port and the outer diameter of the connecting end of the conveying pipe and the feeding port is smaller than the inner diameter of the upper end of the feeding port. A pipeline connection mechanism 4 is also provided between the conveying pipe 3 and the feeding port 13. A lifting mechanism 6 for driving the conveying pipe to move up and down is installed below the conveying pipe 3. When the lifting mechanism drives the conveying pipe to move, the pipeline connection mechanism limits the conveying pipe to prevent the conveying pipe from slipping off the feeding port. A weighing mechanism 5 for monitoring the weight inside the reactor body is installed below the reactor body. A quick-break valve 31 electrically connected to the weighing mechanism is provided near the feeding port of the conveying pipe.

[0024] A limiting ring 32 is fixedly arranged on the outer side of the connecting end of the conveying pipe 3 and the feeding port 13. The feeding port extends outward from the reactor body. The pipeline connection mechanism 4 includes an installation part 41 fixedly arranged on the outer side of the feeding port 13. A heightening seat 42 is fixedly arranged along the outer edge of the feeding port on the installation part. A ring-shaped limiting disc 43 is detachably installed at the end of the heightening seat away from the installation part. When the conveying pipe is connected to the feeding port, the limiting ring is located between the limiting disc and the outer end of the feeding port.

[0025] The limiting disc 43 is assembled by two semi-circular plates. The outer diameter of the conveying pipe 3 is smaller than the inner diameter of the feeding port 13. The outer diameter of the limiting ring 32 is larger than the inner diameters of the feeding port 13 and the limiting disc 43.

[0026] The lifting mechanism 6 includes a bearing plate 61 and a jacking part 62 located below the bearing plate. The feeding pipe is fixed on the bearing plate through a bracket.

[0027] The jacking part specifically adopts a screw rod or a telescopic rod driven by an oil cylinder, and the stroke of the jacking part does not exceed the difference between the distance from the outer end of the feeding port to the limit disc and the thickness of the limit ring 32.

[0028] The feeding pump 2 is also fixed on the bearing plate 61, and the feeding pump and the feeding pipe are relatively fixed.

[0029] A stirring blade 11 is further installed in the kettle body 1, and a driving motor 12 is arranged outside the kettle body. The stirring blade is connected to the driving motor and is driven by the driving motor to rotate.

[0030] For the reaction kettle with precise control of the raw material feeding amount in this embodiment, its working principle is that before feeding the reaction kettle, first connect the feeding pump 2 and the kettle body 1 by using the feeding pipe 3. One end of the feeding pipe can be fixedly connected to the feeding pump, and before the other end is connected to the feeding port 13 of the kettle body, first remove the limit disc 43, insert one end of the feeding pipe into the feeding port, and then install the limit disc so that the limit ring 32 at the end of the feeding pipe is located between the limit disc 43 and the end of the feeding port; before feeding, control the jacking part 62 to drive the whole feeding pipe to move slightly upward so that the limiting part of the feeding pipe does not contact the feeding port and the limit disc, preventing the influence on the measurement value. At this time, feeding is carried out, and the feeding amount is weighed and calculated under the measurement of the weighing mechanism. When the preset value is reached, the weighing mechanism controls the quick-break valve to close to complete the feeding. The feeding pipe needs to be made of a hard and non-deformable material. Even if there is raw material residue in the feeding pipe during this process, it will not affect the measurement of the weighing mechanism.

[0031] The beneficial effect of the present utility model is that through the cooperation of the lifting mechanism and the pipeline connection mechanism, the feeding pipe and the kettle body are separated in weight, and the weighing mechanism will not weigh the feeding pipe and the raw materials in the feeding pipe, so it will not be affected by the residual materials in the feeding pipe, and the overall measurement is more accurate and the product quality is higher.

[0032] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications and variations to the above embodiments within the scope of the present utility model.

Claims

1. A reactor for accurately controlling the amount of raw material added, characterized in that: The invention comprises a kettle body (1), wherein the kettle body (1) is provided with a feed port (13) and a discharge port (14), a feed pump (2) is provided on the outside of the kettle body (1), and the feed pump (2) and the feed port (13) are connected via a delivery pipe (3); the feed port (13) is located on the upper side of the kettle body (1), the connection end of the delivery pipe (3) and the feed port (13) is located above the feed port (13), and the outer diameter of the connection end of the delivery pipe (3) and the feed port (13) is smaller than the inner diameter of the upper end of the feed port (13), and the connection end of the delivery pipe (3) and the feed port (13) is connected to the inner diameter of the upper end of the feed port (13). A pipeline connection mechanism (4) is also provided between the two parts. A lifting mechanism (6) is installed below the feed pipe (3) to drive the feed pipe (3) to move up and down. When the lifting mechanism (6) drives the feed pipe (3) to move, the feed pipe (3) is limited by the pipeline connection mechanism (4) to prevent the feed pipe (3) from slipping off the feed port (13). A weighing mechanism (5) is installed below the kettle body (1) to monitor the internal weight of the kettle body (1). A quick-break valve (31) electrically connected to the weighing mechanism (5) is provided near the feed port (13) on the feed pipe (3).

2. The reactor for accurately controlling the amount of raw material added according to claim 1, characterized in that: A limiting ring (32) is provided on the outer fixed ring of the connection end between the feed pipe (3) and the feed port (13); the feed port (13) extends toward the outside of the kettle body (1); the pipeline connection mechanism (4) comprises a mounting portion (41) with a fixed ring disposed on the outer side of the feed port (13); a heightening seat (42) is fixedly disposed on the mounting portion (41) along the outer edge of the feed port (13); an annular limiting disk (43) is detachably mounted on one end of the heightening seat (42) away from the mounting portion; when the feed pipe (3) is connected to the feed port (13), the limiting ring is located between the limiting disk (43) and the outer end of the feed port (13).

3. The reactor for accurately controlling the amount of raw material added according to claim 2, characterized in that: The limiting plate (43) is assembled from two semi-annular plates; the outer diameter of the feed pipe (3) is smaller than the inner diameter of the feed port (13); and the outer diameter of the limiting ring (32) is larger than the inner diameters of the feed port (13) and the limiting plate (43).

4. The reactor for accurately controlling the amount of raw material added according to claim 3, characterized in that: The lifting mechanism (6) comprises a bearing plate (61) and a lifting portion (62) located below the bearing plate (61), and the material conveying pipe (3) is fixed on the bearing plate (61) via a bracket.

5. The reactor for accurately controlling the amount of raw material added according to claim 4, characterized in that: The lifting part (62) specifically adopts a lifting and retracting rod driven by a screw rod or a cylinder, and the stroke of the lifting part (62) does not exceed the difference between the distance from the outer end of the feed port (13) to the limit plate (43) and the thickness of the limit ring (32).

6. The reactor for accurately controlling the amount of raw material added according to claim 4, characterized in that: The feed pump (2) is also fixed on the bearing plate (61), and the feed pump (2) and the feed pipe (3) remain relatively fixed.

7. The reactor for accurately controlling the amount of raw material added according to claim 1, characterized in that: A stirring blade (11) is also installed in the kettle body (1), and a driving motor (12) is provided outside the kettle body (1). The stirring blade (11) is connected to the driving motor (12) and is driven to rotate by the driving motor (12).

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