Constant-pressure constant-drop device for polyolefin catalyst small-scale test solid suspension
By designing a constant pressure and constant drop device for small-test solid suspensions for polyolefin catalysts, uniform dropping of solid suspensions and pipeline dredging in small-test polyolefin catalysts is achieved, and the problems of uneven dropping addition and pipeline clogging are solved. Improves the stability and safety of the experiment.
Patent Information
- Application Number
- CN202420998345.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In the prior art, the droplet addition of solid suspension liquid in the polyolefin catalyst test is uneven, resulting in unstable experiments, and the pipeline is easily blocked during the droplet addition, which increases the labor intensity and safety risks of the experimenters.
A device including a constant drop assembly, a stirring shaft head, a servo motor, a fine-tuning valve, a micro-pressure metering valve, a thermal insulation jacket and a spiral feeder are designed to achieve uniform dropping of solid suspension through constant pressure and constant dropping. And use nitrogen to clear the blocked pipes to avoid contact with air and solvent evaporation.
The long-term, stable and uniform dropping of solid suspension is achieved, reducing the dredging workload of the experimenter, ensuring the stability and safety of the experiment, and avoiding unstable factors and pipeline blockage caused by uneven dropping.
Smart Images
Figure CN222219631U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polyolefin catalysts, in particular to a constant pressure and constant drip device for a small-scale test of a solid suspension of a polyolefin catalyst. Background Art
[0002] Small-scale laboratory tests require the dripping of solid suspensions, which must be done slowly, evenly, and for a long time.
[0003] The current dropping method has the problems of uneven dropping, high concentration in the early stage and low concentration in the later stage, which increases the instability factors of the experiment. In addition, the solution causes valve blockage during the dropping process, and the dropping rate is difficult to control. When it is blocked, the connecting parts need to be removed and the pipes need to be unblocked, causing the solution to be emptied and absorb water, which not only affects the experimental results but also increases the labor intensity of the small test. In addition, the temperature of the suspension cannot be controlled during the previous dropping process, resulting in a large temperature difference with the reaction bottle, which increases the instability factors of the experiment and affects the repeatability of the experiment. Utility Model Content
[0004] The purpose of the utility model is to provide a constant pressure and constant drop device for solid suspension of polyolefin catalyst small-scale test, which can dredge blocked pipes, greatly reducing the workload of experimenters in demolition and dredging, and also eliminating the risk of contact with air and solvent volatilization during demolition, thereby ensuring the safety of the environment and personnel, and can solve the problems in the prior art.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a constant pressure and constant drip device for a small-scale test of a solid suspension of a polyolefin catalyst, comprising a constant drip assembly, a stirring shaft head is arranged on the top of the constant drip assembly, a servo motor is arranged above the stirring shaft head, an output pipe valve is arranged at the bottom of the constant drip assembly, a fine-tuning valve is arranged at the bottom of the output pipe valve, a micro-pressure metering valve is arranged on the outside of the fine-tuning valve, an insulation jacket is arranged below the fine-tuning valve, a reflux pipe is arranged on one side of the constant drip assembly, a spiral feeder is arranged on the other side of the constant drip assembly, a constant pressure pipe is arranged on one side of the output pipe valve, a stirring shaft is arranged inside the constant drip assembly, the stirring shaft is rotatably connected to the servo motor, a temperature conduit is arranged on one side of the stirring shaft head, and a fixed conduit is arranged on the other side of the stirring shaft head.
[0006] Preferably, a hole groove structure with a ground edge is provided on the top side of the constant drip assembly, and the temperature conduit and the fixed conduit both extend to the interior of the constant drip assembly through the hole groove.
[0007] Preferably, the fixed catheter includes an inner part and an outer part of the constant drop, wherein the inner part of the constant drop is divided into two sections, the first section is 60° downward to the horizontal plane, and the second section is 90° downward to the horizontal plane, and the outer part of the constant drop is divided into two sections, the first section is 60° upward to the horizontal plane, and the second section is 90° upward to the horizontal plane, with a 19 / 24 ground mouth, and the four sections of the inner and outer catheters of the constant drop are located in the same plane.
[0008] Preferably, an opening is provided at an eccentric position on the surface of the output pipe valve, and the insulation jacket and the constant pressure tube are both connected to the reaction bottle.
[0009] Preferably, the micro-pressure metering valve includes an input end, a buffer end, a constant pressure end, a regulating end and an output end. The input end is connected to the fine-tuning valve through a flange, and the output end is connected to the insulation jacket through a flange. A pressure relief valve seat is provided inside the input end, and the pressure relief valve seat is rotatably connected to the input end through an internal thread.
[0010] Preferably, a buffer support is provided inside the buffer end, a linkage valve stem is provided above the buffer support, a transfer arm is provided at one end of the linkage valve stem, the transfer arm is connected to the constant pressure airbag, the constant pressure airbag is located inside the constant pressure end, and a ball shaft is provided at the other end of the linkage valve stem, and the ball shaft is connected to the pressure relief valve seat through a slot.
[0011] Preferably, a stretch spring buckle is arranged above the linkage valve stem, the stretch spring buckle is connected to the linkage valve stem through a snap buckle, a regulating spring is arranged inside the regulating end, a regulating cone head is arranged at the bottom of the regulating spring, and a regulating sealing end is arranged at the top of the regulating spring.
[0012] Preferably, a ball bar is provided below the regulating cone head, a bracket is provided in the middle section of the ball bar, a return spring is provided above the other end of the ball bar, an output valve stem is provided above the return spring, and the return spring and the output valve stem are installed inside the output end.
[0013] Compared with the prior art, the beneficial effects of this invention are:
[0014] 1. The utility model realizes a long-term, stable and uniform dropping process of the solid suspension through the operation of the whole dropping device, ensures the stability of the experiment, eliminates the unstable factors caused by uneven dropping, avoids the high-frequency dredging and adjustment work in the dropping process, and reduces the burden on personnel; at the same time, the improvement of stirring is conducive to a more uniform distribution of the suspension, ensuring that the concentration of the dropping before and after is basically the same; the design of the constant drop bottom reduces the frequency of solid particles blocking the valve, and because the three-way is connected to nitrogen, the blocked pipeline can be dredged, which greatly reduces the workload of the experimenter's dismantling and dredging, and also eliminates the risk of contact with air and solvent volatilization during dismantling, ensuring the safety of the environment and personnel;
[0015] 2. In the present invention, the reagent enters the buffer end through the input end, then enters the constant pressure end through the buffer end, and then enters the regulating end through the buffer end. If the flow pressure is too high at this time, the ball lever will be pressed down through the regulating cone head. At this time, the output valve stem at the other end of the ball lever will be lifted to complete the closing operation of the output end. The reagent flows back through the buffer end to reduce the pressure in the valve. After the pressure returns to normal, the ball lever restores balance under the action of the springs on both sides, and the reagent flows out normally through the output end. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The overall main view of this utility;
[0017] Figure 2 This is an overall side view of the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the practical micro-pressure metering valve;
[0019] Figure 4 This is a schematic diagram of the partial cross-sectional structure of the micro-pressure metering valve of this utility model;
[0020] Figure 5 This is a schematic diagram of the linkage valve stem structure of this utility model;
[0021] Figure 6 The utility model is a schematic diagram of the ball bar structure.
[0022] In the figure: 1, constant drop assembly; 2, stirring shaft head; 3, stirring shaft; 4, temperature catheter; 5, fixed catheter; 6, screw feeder; 7, fine-tuning valve; 8, micro-pressure metering valve; 9, servo motor; 10, insulation jacket; 11, constant pressure tube; 101, reflux pipe; 102, output pipe valve; 801, input end; 802, buffer end; 803, constant pressure end; 804, regulating end; 805, output end; 806, ball lever; 807, linkage valve stem; 8011, pressure relief valve seat; 8021, buffer support; 8022, stretch spring buckle; 8031, constant pressure airbag; 8041, regulating sealing end; 8042, regulating spring; 8043, regulating cone head; 8051, reset spring; 8052, output valve stem; 8071, ball shaft; 8072, adapter arm. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the practical embodiment to clearly and completely describe the technical solution in the practical embodiment. Obviously, the described embodiment is only a part of the embodiment of the practical embodiment, not all of the embodiments. Based on the embodiment in the practical embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical embodiment.
[0024] In order to solve the problem of uneven dripping, high concentration in the early stage and low concentration in the later stage in the dripping method; please refer to Figure 1-6 , this embodiment provides the following technical solutions:
[0025] A constant pressure and constant drip device for a small-scale test of a solid suspension of a polyolefin catalyst, comprising a constant drip component 1, a stirring shaft head 2 is arranged on the top of the constant drip component 1, a servo motor 9 is arranged above the stirring shaft head 2, an output pipe valve 102 is arranged at the bottom of the constant drip component 1, a fine-tuning valve 7 is arranged at the bottom of the output pipe valve 102, a micro-pressure metering valve 8 is arranged on the outside of the fine-tuning valve 7, a heat preservation jacket 10 is arranged below the fine-tuning valve 7, a reflux pipe 101 is arranged on one side of the constant drip component 1, and a spiral The feeder 6 can realize the uniform addition of solid powder, turning the experimental influencing factors into controllable factors. The internal conduit of the constant drop is 90° downward to avoid the added powder flying around, adsorbing on the stirring paddle and the inner wall of the constant drop, and causing the adverse effect of low solid concentration in the suspension. A constant pressure tube 11 is provided on one side of the output pipe valve 102. A stirring shaft 3 is provided inside the constant drop assembly 1. The stirring shaft 3 is rotatably connected to the servo motor 9. A temperature conduit 4 is provided on one side of the stirring shaft head 2, and a fixed conduit 5 is provided on the other side of the stirring shaft head 2.
[0026] The top side of the constant drop component 1 is provided with a hole groove structure with a ground mouth, and the temperature conduit 4 and the fixed conduit 5 are extended to the interior of the constant drop component 1 through the hole groove, and the fixed conduit 5 includes an inner part of the constant drop and an outer part of the constant drop, wherein the inner part of the constant drop is divided into two sections, the first section is 60° downward with the horizontal plane, and the second section is 90° downward with the horizontal plane, and the outer part of the constant drop is divided into two sections, the first section is 60° upward with the horizontal plane, and the second section is 90° upward with the horizontal plane, with a 19 / 24 ground mouth, the four sections of the inner and outer conduits of the constant drop are located in the same plane, and the eccentric part of the surface of the output pipe valve 102 is provided with an opening, and the insulation jacket 10 and the constant pressure tube 11 are both connected to the reaction bottle. By adding a conduit at the eccentric part of the bottom of the constant drop, the advantage is that when the dripping is at the end and the servo stirring cannot stir the suspension, nitrogen can be introduced through the conduit here to agitate the remaining suspension to prevent sedimentation, so as to achieve uniform concentration of the whole dripping process;
[0027] The micro-pressure metering valve 8 includes an input end 801, a buffer end 802, a constant pressure end 803, a regulating end 804 and an output end 805. The input end 801 is connected to the fine-tuning valve 7 through a flange, and the output end 805 is connected to the insulation jacket 10 through a flange. A pressure relief valve seat 8011 is arranged inside the input end 801, and the pressure relief valve seat 8011 is rotatably connected to the input end 801 through an internal thread. A buffer support 8021 is arranged inside the buffer end 802, and a linkage valve stem 807 is arranged above the buffer support 8021. A transfer arm 8072 is arranged at one end of the linkage valve stem 807, and the transfer arm 8072 is connected to the constant pressure airbag 8031. The constant pressure airbag 8031 is located inside the constant pressure end 803, and a ball shaft 807 is arranged at the other end of the linkage valve stem 807. 071, the ball shaft 8071 is connected to the pressure relief valve seat 8011 through a slot, a tension spring buckle 8022 is arranged above the linkage valve stem 807, and the tension spring buckle 8022 is connected to the linkage valve stem 807 through a buckle, a regulating spring 8042 is arranged inside the regulating end 804, a regulating cone head 8043 is arranged at the bottom of the regulating spring 8042, a regulating sealing end 8041 is arranged on the top of the regulating spring 8042, a ball bar 806 is arranged below the regulating cone head 8043, a bracket is arranged in the middle section of the ball bar 806, a return spring 8051 is arranged above the other end of the ball bar 806, an output valve stem 8052 is arranged above the return spring 8051, and the return spring 8051 and the output valve stem 8052 are installed inside the output end 805;
[0028] The reagent enters the buffer end 802 through the input end 801, then enters the constant pressure end 803 through the buffer end 802, and then enters the regulating end 804 through the buffer end 802. If the flow pressure is too high at this time, the ball bar 806 will be pressed down through the regulating cone head 8043. At this time, the output valve stem 8052 at the other end of the ball bar 806 will be lifted to complete the closing operation of the output end 805. The reagent flows back through the buffer end 802 to reduce the pressure in the valve. After the pressure returns to normal, the ball bar 806 restores balance under the action of the springs on both sides, and the reagent flows out through the output end 805 normally.
[0029] Working principle: add qualified solvent to the constant drop 1 through the fixed conduit 5. During the addition process, nitrogen is continuously introduced into the reaction bottle, and the airflow flows out from the fixed conduit 5 through the constant pressure tube 10 to ensure that the constant drop is always under nitrogen protection. The fixed conduit can also be used to increase small constant drops and to drip other solutions. After the solvent is added, stirring is started to ensure the uniformity of the solution. The stirring speed of each time period is set according to the needs. The constant drop is temperature controlled by a certain brand of constant temperature oil bath. A temperature probe is inserted into the temperature conduit to monitor the temperature in real time. When solid powder is added, under the action of the spiral feeder, the solid powder is added to the solution at a uniform speed through a 90° conduit to achieve uniformity of front and back feeding. By observing the micro-pressure metering valve 8, the drip acceleration rate is monitored in real time, and the flow rate is adjusted through the fine-tuning valve 7. Nitrogen is connected to the three-way, and the fine-tuning valve can be dredged intermittently. The conduit at the eccentric point of the constant drop is connected to nitrogen. When the solution in the constant drop cannot be stirred under the action of the stirring paddle, nitrogen is introduced to agitate the solution to ensure that the solid in the solution does not settle.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used 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.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A constant pressure and constant drip device for a small-scale test of a solid suspension of a polyolefin catalyst, comprising a constant drip assembly (1), characterized in that: The top of the constant drip assembly (1) is provided with a stirring shaft head (2), the top of the stirring shaft head (2) is provided with a servo motor (9), the bottom of the constant drip assembly (1) is provided with an output pipe valve (102), the bottom of the output pipe valve (102) is provided with a fine-tuning valve (7), the outer side of the fine-tuning valve (7) is provided with a micro-pressure metering valve (8), and the bottom of the fine-tuning valve (7) is provided with a heat-insulating jacket (10), one side of the constant drip assembly (1) is provided with a reflux pipe (101), the other side of the constant drip assembly (1) is provided with a screw feeder (6), one side of the output pipe valve (102) is provided with a constant pressure pipe (11), the interior of the constant drip assembly (1) is provided with a stirring shaft (3), the stirring shaft (3) is rotatably connected to the servo motor (9), one side of the stirring shaft head (2) is provided with a temperature conduit (4), and the other side of the stirring shaft head (2) is provided with a fixed conduit (5).
2. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 1, characterized in that: A hole groove structure with a ground edge is provided on the top side of the constant drip assembly (1), and the temperature conduit (4) and the fixed conduit (5) both extend through the hole groove to the interior of the constant drip assembly (1).
3. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 2, characterized in that: The fixed conduit (5) comprises an inner constant drop part and an outer constant drop part, wherein the inner constant drop part is divided into two sections, the first section is 60° downward from the horizontal plane, and the second section is 90° downward from the horizontal plane, and the outer constant drop part is divided into two sections, the first section is 60° upward from the horizontal plane, and the second section is 90° upward from the horizontal plane, with a 19 / 24 ground mouth, and the four sections of the inner and outer constant drop conduits are located in the same plane.
4. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 1, characterized in that: An opening is provided at an eccentric position on the surface of the output pipe valve (102), and the heat-insulating jacket (10) and the constant pressure tube (11) are both connected to the reaction bottle.
5. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 1, characterized in that: The micro-pressure metering valve (8) comprises an input end (801), a buffer end (802), a constant pressure end (803), a regulating end (804) and an output end (805); the input end (801) is connected to the fine-tuning valve (7) via a flange; the output end (805) is connected to the thermal insulation jacket (10) via a flange; a pressure relief valve seat (8011) is provided inside the input end (801); and the pressure relief valve seat (8011) is rotatably connected to the input end (801) via an internal thread.
6. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 5, characterized in that: A buffer support (8021) is arranged inside the buffer end (802), a linkage valve stem (807) is arranged above the buffer support (8021), a transfer arm (8072) is arranged at one end of the linkage valve stem (807), the transfer arm (8072) is connected to a constant pressure airbag (8031), the constant pressure airbag (8031) is located inside the constant pressure end (803), and a ball shaft (8071) is arranged at the other end of the linkage valve stem (807), and the ball shaft (8071) is connected to the pressure relief valve seat (8011) through a slot.
7. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 6, characterized in that: A tension spring buckle (8022) is arranged above the linkage valve stem (807), and the tension spring buckle (8022) is connected to the linkage valve stem (807) by a snap buckle. A regulating spring (8042) is arranged inside the regulating end (804), a regulating cone head (8043) is arranged at the bottom of the regulating spring (8042), and a regulating sealing end (8041) is arranged at the top of the regulating spring (8042).
8. A constant pressure and constant drop device for a small-scale test of a solid suspension of a polyolefin catalyst according to claim 7, characterized in that: A ball bar (806) is arranged below the regulating cone head (8043), a bracket is arranged in the middle section of the ball bar (806), a return spring (8051) is arranged above the other end of the ball bar (806), an output valve stem (8052) is arranged above the return spring (8051), and the return spring (8051) and the output valve stem (8052) are installed inside the output end (805).