Low shear and low viscosity reduction regulating valve

Abstract

The present invention relates to a low-shear, low-viscosity-reduction regulating valve, comprising an inlet pipe, an outlet, a first regulating pipe, a first regulating mechanism, a second regulating pipe, and a second regulating mechanism. The first regulating pipe is connected to the inlet pipe and the outlet, the first regulating mechanism regulates the flow rate of the first regulating pipe, the second regulating pipe is connected to the inlet pipe and the outlet and is connected in parallel with the first regulating pipe, and the second regulating mechanism regulates the flow rate of the second regulating pipe with a greater regulation amplitude than the first regulating mechanism. By adopting the above solution, the present invention provides a low-shear, low-viscosity-reduction regulating valve that can quickly and accurately regulate the flow rate of high molecular polymers.

Description

Technical Field

[0001] The present invention relates to the field of regulating valves, and in particular to a low shear and low viscosity reduction regulating valve. Background Art

[0002] A regulating valve is a valve with the function of regulating fluid flow. When it is needed to be used to transport high-molecular polymers, ordinary regulating valves have disadvantages such as complex flow paths and large fluid resistance, which make them have a strong shearing effect, causing the molecular chains of the high-molecular polymers flowing through to break, destroying the high-molecular structure and thus reducing the viscosity.

[0003] In order to solve the above problems, it is necessary to use a low-shear, low-viscosity-reduction regulating valve to transmit high molecular polymers, thereby reducing the impact on the structure of the high molecular polymers. However, the traditional low-shear, low-viscosity-reduction regulating valve only has a single adjustment mechanism. In order to ensure the adjustment accuracy, it can only be adjusted in a small range, resulting in a significant reduction in adjustment efficiency. When the required flow rate is significantly different from the current flow rate, a lot of time is required. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a low shear and low viscosity reduction regulating valve that can quickly and accurately regulate the flow of high molecular polymers.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: including an inlet, an outlet, a first regulating pipe and a first regulating mechanism, the first regulating pipe is connected to the inlet and the outlet, and the first regulating mechanism regulates the flow of the first regulating pipe, characterized in that: it also includes a second regulating pipe and a second regulating mechanism, the second regulating pipe is connected to the inlet and the outlet and is connected in parallel with the first regulating pipe, and the second regulating mechanism regulates the flow of the second regulating pipe and the regulation amplitude is greater than that of the first regulating mechanism.

[0006] By adopting the above technical solution, a second regulating pipe with a large flow rate is added, and a second regulating mechanism with a high regulating amplitude is set, which cooperates with the original first regulating pipe with a small flow rate and the first regulating mechanism with a small regulating amplitude. The two regulating pipes transport the polymer at the same time. When the flow rate needs to be adjusted, the second regulating mechanism ensures the regulating amplitude, and the first regulating mechanism ensures the regulating accuracy. The two regulating mechanisms work together to quickly and accurately adjust the flow rate of the polymer, avoiding the disadvantages of insufficient accuracy or too small amplitude caused by a single regulating mechanism.

[0007] The present invention is further configured as follows: the second regulating mechanism includes a front connecting section and a rear connecting section, a plurality of switching pipes with different flow rates are arranged in parallel between the front connecting section and the rear connecting section, and a switching component is provided at the connection between the front connecting section and the switching pipe for connecting the front connecting section with a single switching pipe, with multiple switching pipes, or not with the switching pipe.

[0008] By adopting the above technical solution, the flow rate is adjusted by switching the switching pipes with different flow rates. Compared with the valve core adjustment method, the flow rate can be adjusted quickly and significantly, making the adjustment more efficient.

[0009] The present invention is further configured as follows: the switching assembly includes a fixed disk, a rotating disk and a rotary actuator, the fixed disk is fixed to the front connecting section, the fixed disk is provided with switching holes connected one by one with each switching pipe, the rotating disk is driven by the rotary actuator to rotate in engagement with the other side of the switching pipe relative to the fixed disk and close each switching hole, the rotating disk is provided with a notch, and the notch opens the end of a single or multiple switching holes when the rotating disk rotates.

[0010] By adopting the above technical solution, different flow rates are formed by closing different switching holes by the rotating disk, which makes the switching path shorter, more stable and more efficient.

[0011] The present invention is further configured such that: the switching pipes are spiral pipes with different apertures.

[0012] By adopting the above technical solution, as one of the implementation methods of the switching pipeline, the spiral structure can effectively reduce the flow rate, and the inner wall is relatively smooth without dead corners or protrusions, thereby meeting the requirements of low shear and low viscosity reduction.

[0013] The present invention is further configured as follows: the switching pipe includes a coaxially arranged reduction sleeve and a tube core, the inner circumference of the reduction sleeve is provided with a reduction pipe wall, the inner side wall cross-section of the reduction pipe wall is a plurality of reduction arc-shaped depressions and reduction arc-shaped protrusions arranged at intervals along the axial direction, the tube core and the reduction pipe wall serve as a flow space, and the distance between the tube core and the highest point of the reduction arc protrusion of different switching pipes is different.

[0014] By adopting the above technical solution, as another implementation method of the switching pipe, the distance between the tube core of the different switching pipes and the highest point of the deceleration arc protrusion is different, so that the switching pipe forms different flow rates. The Venturi tube structure formed between the tube core and the deceleration pipe wall can effectively reduce the flow rate, and the inner wall is relatively smooth, without dead corners or protrusions, thereby meeting the requirements of low shear and low viscosity reduction.

[0015] The present invention is further configured as follows: the deceleration pipe wall and the deceleration sleeve are separately provided and are composed of a plurality of deceleration pipe wall units arranged in sequence along the axial direction, and the connection position of adjacent deceleration pipe wall units is located at the highest point of the deceleration arc protrusion.

[0016] By adopting the above technical solution, since the switching pipe has a certain length, it is difficult to process the complete undulating inner wall. Therefore, the deceleration pipe wall and the deceleration sleeve are separated and the deceleration pipe wall is divided into multiple deceleration pipe wall units and then assembled to simplify the processing difficulty. At the same time, the connection position of adjacent deceleration pipe wall units is located at the highest point of the deceleration arc protrusion, thereby ensuring stability after assembly.

[0017] The present invention is further configured as follows: limit seats are respectively provided at both ends of the reduction sleeve, and a limit cavity of the reduction tube wall is formed between the limit seats at both ends, the outer periphery of the limit seat is threadedly matched with the inner periphery of the reduction sleeve, a mounting hole is provided at the center of the limit seat, and the tube core is provided with a screw passing through the mounting hole, and a nut is provided at the other end of the screw located at the limit seat opposite to the tube core, which is counteracted by the limit seat, and the diameter of the screw is smaller than the tube core, forming a limit step counteracting the limit seat, and the limit seat is penetrated by a plurality of circulation holes arranged circumferentially and connected to the circulation space.

[0018] By adopting the above technical solution, the limit seat fixed on the inner side of the reduction sleeve limits the reduction pipe wall and is used to fix the pipe core, making the assembly structure more compact, making the reduction pipe wall unit and the pipe core easier to replace and adjust the flow rate, and also providing a flow hole to ensure the normal, uniform and smooth flow of the polymer.

[0019] The present invention is further configured as follows: the first regulating pipe includes a regulating sleeve, an regulating pipe wall is arranged in the regulating sleeve, the inner side wall cross-section of the regulating pipe wall is a plurality of regulating arc-shaped depressions and regulating arc-shaped protrusions arranged at intervals along the axial direction, the first regulating mechanism includes a valve core and a linear actuator, the valve core is a rod-shaped component, the valve core is located in the first regulating pipe and moves axially along the first regulating pipe under the drive of the linear actuator, the cross-section of the outer side wall of the valve core is a plurality of valve core arc-shaped depressions and valve core arc-shaped protrusions arranged at intervals along the axial direction, and the regulating arc-shaped protrusions switch to correspond to different positions of the outer side wall of the valve core when the valve core moves linearly, forming a circulation space with different flow rates.

[0020] By adopting the above technical solution, the arc-shaped protrusion of the valve core corresponds to different positions of the inner wall of the regulating tube wall, forming a circulation space with different flow rates. Compared with the traditional inverted cone-shaped regulating structure, the regulating path is shorter, the stability is better, and the efficiency is higher. Moreover, the inner wall is relatively smooth, and there are no dead corners or protrusions, thereby meeting the requirements of low shear and low viscosity reduction.

[0021] The present invention is further configured as follows: the adjusting tube wall and the adjusting sleeve are separately provided and are composed of a plurality of adjusting tube wall units sequentially arranged along the axial direction, and the connection position of adjacent adjusting tube wall units is located at the highest point of the adjusting arc-shaped protrusion.

[0022] By adopting the above technical solution, since the adjusting tube wall has a certain length, it is difficult to process the complete undulating inner wall. Therefore, the adjusting tube wall and the adjusting sleeve are set separately and the adjusting tube wall is divided into multiple adjusting tube wall units and then assembled to simplify the processing difficulty. At the same time, the connection position of adjacent adjusting tube wall units is located at the highest point of the adjusting arc protrusion, thereby ensuring stability after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A cross-sectional view of a specific embodiment of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of middle A;

[0025] Figure 3 is a top view of the fixed disk;

[0026] Figure 4 is a top view of the movable disk;

[0027] Figure 5 Schematic diagram of the coordination between the fixed plate and the movable plate Figure 1 ;

[0028] Figure 6 Schematic diagram of the coordination between the fixed plate and the movable plate Figure 2 ;

[0029] Figure 7 Schematic diagram of the coordination between the fixed plate and the movable plate Figure 3 ;

[0030] Figure 8 Schematic diagram of the coordination between the fixed plate and the movable plate Figure 4 ;

[0031] Figure 9 The second specific implementation method for switching pipelines;

[0032] Figure 10 for Figure 9 Enlarged view of middle B;

[0033] Figure 11 for Figure 9 Enlarged view of middle C;

[0034] Figure 12 for Figure 1 Enlarged view of D in the middle. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] like Figure 1 As shown, the present invention discloses a low shear and low viscosity reduction regulating valve, comprising an inlet 1, an outlet 2, a first regulating pipe 3, a first regulating mechanism 4, a second regulating pipe 5 and a second regulating mechanism 6. The first regulating pipe 3 and the second regulating pipe 5 are connected in parallel to the inlet 1 and the outlet 2. The first regulating mechanism 4 regulates the flow of the first regulating pipe 3, and the second regulating mechanism 6 regulates the flow of the second regulating pipe 5, and the regulation amplitude is greater than that of the first regulating mechanism 4.

[0038] Among them, the second regulating mechanism 6 includes a front connecting section 61 and a rear connecting section 62, and a plurality of switching pipes with different flow rates are arranged in parallel between the front connecting section 61 and the rear connecting section 62. A switching component is provided at the connection between the front connecting section 61 and the switching pipe, which connects the front connecting section 61 with a single switching pipe, with multiple switching pipes, or not with a switching pipe.

[0039] like Figure 2 As shown, the switching assembly includes a fixed disk 63, a rotating disk 64 and a rotary actuator 65. The rotary actuator is composed of a motor and a valve stem. The rotating disk 64 is fixed to the valve stem. The fixed disk 63 is fixed to the front connecting section 61. The fixed disk 63 is provided with a switching hole 631 connected to each switching pipe 64 one by one. For clarity, Figure 2 Only one switching pipe is drawn. Driven by the rotary actuator 65 , the rotating disk 64 rotates in contact with the fixed disk 63 relative to the other side of the switching pipe and closes each switching hole 631 .

[0040] like Figure 3 As shown, the fixed disk 63 is provided with three switching holes 631 with different diameters and arranged along the circumference, namely hole a, hole b, and hole c with gradually increasing diameters, as shown in FIG. Figure 4As shown, notches 641 are provided on both sides of the rotating disk 64. Figure 5 As shown, the rotating disk 64 closes all the switching holes 631, so that the second regulating pipe 5 is closed and the flow rate is 0; Figure 6 As shown, the rotating disk 64 rotates relative to the fixed disk 63, and the notch 641 opens the a hole and the b hole, and the flow rate is the sum of the flow rates of the a hole and the b hole; Figure 7 As shown, the rotating disk 64 continues to rotate relative to the fixed disk 63, the notch 641 opens the a hole, and the flow rate is the a hole flow rate; Figure 8 As shown, rotating disk 64 continues to rotate relative to fixed disk 63, and notch 641 opens holes a, b, and c. The flow rate is the sum of the flow rates of holes a, b, and c. In actual design, the number of switching holes 631 and the relative rotation angle of switching holes 631 can be adjusted as needed to adapt to different adjustment requirements.

[0041] like Figure 1 As shown in FIG. 1 , as one of the specific implementations of the switching pipe, the switching pipe is a spiral pipe 66 with different apertures.

[0042] like Figure 9 、 Figure 10 、 Figure 11 As shown, as the second specific embodiment of the switching pipe, the switching pipe includes a coaxially arranged reduction sleeve 67 and a tube core 671, and a reduction pipe wall 672 is provided on the inner periphery of the reduction sleeve 67. The inner side wall cross-section of the reduction pipe wall 672 is a plurality of reduction arc-shaped recesses 6721 and reduction arc-shaped protrusions 6722 arranged at intervals along the axial direction. The space between the tube core 671 and the reduction pipe wall 672 serves as a circulation space. The distance (distance d) between the tube core 671 and the lowest point of the reduction arc-shaped recess 6721 and the distance (distance e) between the tube core 671 and the highest point of the reduction arc-shaped protrusion 6722 of different switching pipes are different. The reduction pipe wall 672 is separately provided with the reduction sleeve 67 and is composed of a plurality of reduction pipe wall units 6723 arranged in sequence along the axial direction. The connection position of adjacent reduction pipe wall units 6723 is located at the highest point of the reduction arc-shaped protrusion 6722. The reduction sleeve 67 is provided with structures for limiting the reduction pipe wall units 6723 at both ends of the reduction pipe wall 672.

[0043] Limiting seats 673 are respectively provided at both ends of the reduction sleeve 67, and a limiting cavity of the reduction tube wall 672 is formed between the limiting seats 673 at both ends. The outer periphery of the limiting seat 673 is threadedly matched with the inner periphery of the reduction sleeve 67. A mounting hole 6731 is provided in the center of the limiting seat 673, and the tube core 671 is provided with a screw 6711 passing through the mounting hole 6731. The screw 6711 is located at the other end of the limiting seat 673 opposite to the tube core 671, and a nut 6712 is provided to abut against the limiting seat 673. The diameter of the screw 6711 is smaller than that of the tube core 671, forming a limiting step 6713 abutting against the limiting seat 673. The limiting seat 673 is penetrated by a plurality of circulation holes 6732 arranged along the circumferential direction and connected to the circulation space.

[0044] like Figure 12 As shown, the first regulating pipe 3 includes a regulating sleeve 31, an regulating pipe wall 32 is provided in the regulating sleeve 31, and the inner side wall cross section of the regulating pipe wall 32 is a plurality of regulating arc-shaped recesses 321 and regulating arc-shaped protrusions 322 arranged in an axial direction. The first regulating mechanism includes a valve core 41 and a linear actuator 42. The linear actuator 42 is composed of a cylinder or an oil cylinder and a valve stem. The valve core 41 is a rod-shaped component. The valve core 41 is located in the first regulating pipe 3 and moves axially along the first regulating pipe 3 under the drive of the linear actuator 34. The cross section of the outer side wall of the valve core 41 is spaced along the axial direction. There are multiple arc-shaped depressions 411 and arc-shaped protrusions 412 of the valve core arranged at intervals. The adjusting arc-shaped protrusion 322 switches to correspond to different positions of the outer wall of the valve core 41 when the valve core 41 moves linearly, forming a circulation space with different flow rates. The adjusting tube wall 32 and the adjusting sleeve 31 are separately arranged and are composed of multiple adjusting tube wall units 323 arranged in sequence along the axial direction. The connection position of adjacent adjusting tube wall units 323 is located at the highest point of the adjusting arc-shaped protrusion 322. The adjusting sleeve 31 is located at both ends of the adjusting tube wall 32 and is respectively provided with a structure for limiting the adjusting tube wall unit 323.

Claims

1. A low shear and low viscosity reduction regulating valve, comprising an inlet, an outlet, a first regulating pipe, and a first regulating mechanism, wherein the first regulating pipe is connected to the inlet and the outlet, and the first regulating mechanism regulates the flow rate of the first regulating pipe, characterized in that: The system further comprises a second regulating pipe and a second regulating mechanism, wherein the second regulating pipe is connected to the inlet and the outlet and is connected in parallel with the first regulating pipe, and the second regulating mechanism regulates the flow of the second regulating pipe with a greater regulating amplitude than the first regulating mechanism; The second regulating mechanism includes a front connecting section and a rear connecting section, and a plurality of switching pipes with different flow rates are arranged in parallel between the front connecting section and the rear connecting section. A switching component is provided at the connection between the front connecting section and the switching pipe, which connects the front connecting section with a single switching pipe, with multiple switching pipes, or not with the switching pipe.

2. The low shear and low viscosity reduction regulating valve according to claim 1, characterized in that: The switching assembly includes a fixed disk, a rotating disk and a rotary actuator. The fixed disk is fixed to the front connecting section. The fixed disk is provided with switching holes connected to each switching pipe one by one. The rotating disk is driven by the rotary actuator to rotate in engagement with the other side of the switching pipe relative to the fixed disk and close each switching hole. The rotating disk is provided with a notch, which opens the end of a single or multiple switching holes when the rotating disk rotates.

3. The low shear and low viscosity reduction regulating valve according to claim 1, characterized in that: The switching pipes are spiral pipes with different apertures.

4. The low shear and low viscosity reduction regulating valve according to claim 1, characterized in that: The switching pipe includes a coaxially arranged reduction sleeve and a tube core. The inner periphery of the reduction sleeve is provided with a reduction tube wall. The inner side wall cross-section of the reduction tube wall is composed of a plurality of reduction arc-shaped depressions and reduction arc-shaped protrusions arranged at intervals along the axial direction. The tube core and the reduction tube wall serve as a flow space. The distance between the tube core and the highest point of the reduction arc-shaped protrusion of different switching pipes is different.

5. The low shear and low viscosity reduction regulating valve according to claim 4, characterized in that: The deceleration pipe wall and the deceleration sleeve are separately provided and are composed of a plurality of deceleration pipe wall units sequentially arranged along the axial direction. The connection position of adjacent deceleration pipe wall units is located at the highest point of the deceleration arc protrusion.

6. The low shear and low viscosity reduction regulating valve according to claim 4, characterized in that: Limit seats are respectively provided at both ends of the reduction sleeve, and a limit cavity of the reduction tube wall is formed between the limit seats at both ends. The outer periphery of the limit seat is threadedly matched with the inner periphery of the reduction sleeve, and a mounting hole is provided in the center of the limit seat. The tube core is provided with a screw passing through the mounting hole. The screw is located at the other end of the limit seat opposite to the tube core and is provided with a nut that is against the limit seat. The diameter of the screw is smaller than the tube core, forming a limit step that is against the limit seat. The limit seat is penetrated by a plurality of circulation holes arranged along the circumferential direction and connected to the circulation space.

7. The low shear and low viscosity reduction regulating valve according to claim 1, characterized in that: The first regulating pipe includes a regulating sleeve, an regulating pipe wall is arranged in the regulating sleeve, the inner side wall cross-section of the regulating pipe wall is a plurality of regulating arc-shaped depressions and regulating arc-shaped protrusions arranged at intervals along the axial direction, the first regulating mechanism includes a valve core and a linear actuator, the valve core is a rod-shaped component, the valve core is located in the first regulating pipe and moves axially along the first regulating pipe under the drive of the linear actuator, the cross-section of the outer side wall of the valve core is a plurality of valve core arc-shaped depressions and valve core arc-shaped protrusions arranged at intervals along the axial direction, and the regulating arc-shaped protrusions switch to correspond to different positions of the outer side wall of the valve core when the valve core moves linearly, forming a circulation space with different flow rates.

8. The low shear and low viscosity reduction regulating valve according to claim 7, characterized in that: The regulating pipe wall and the regulating sleeve are separately provided and are composed of a plurality of regulating pipe wall units sequentially arranged along the axial direction. The connection position of adjacent regulating pipe wall units is located at the highest point of the regulating arc-shaped protrusion.

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