A multi-stage compensation device

Abstract

This utility model discloses a multi-stage compensation device, including a conveying pipeline for transporting fluid, and a coarse adjustment compensation mechanism and a fine adjustment compensation mechanism respectively disposed on the conveying pipeline. The coarse adjustment compensation mechanism includes a coarse adjustment elastic element that adjusts the pulsating pressure in the conveying pipeline by deformation, and a pressure coarse adjustment component for providing coarse adjustment back pressure to the coarse adjustment elastic element. The fine adjustment compensation mechanism includes a fine adjustment elastic element that adjusts the pulsating pressure in the conveying pipeline by deformation, and a pressure fine adjustment component for providing fine adjustment back pressure to the fine adjustment elastic element, wherein the fine adjustment back pressure is greater than the coarse adjustment back pressure. By setting up the coarse adjustment compensation mechanism and the fine adjustment compensation mechanism, this utility model enables the coarse adjustment compensation mechanism to eliminate or compensate for most of the pulsating pressure, while the pulsating pressure that is not eliminated or compensated in a timely and sufficient manner is quickly and accurately eliminated or compensated by the fine adjustment compensation mechanism. The two work together to make the material conveying more stable.

Description

Technical Field

[0001] This utility model belongs to the field of packaging and conveying, and in particular relates to a pipeline compensation device. Background Technology

[0002] In the civil explosives emulsion packaging industry, the continuous improvement of automation levels has placed higher demands on the performance and operational stability of production equipment, especially emulsion loading machines. In the core loading process, the loading accuracy of the emulsion loading machine directly determines the weight control precision of a single explosive cartridge. However, current production practices show that packaged cartridges generally exhibit significant weight deviations. This not only affects product quality consistency but also leads to material waste and may even pose safety hazards due to excessive weight. To effectively improve the filling accuracy of loading machines, enhance overall packaging quality, and reduce the weight deviation of single explosive cartridges, targeted measures are urgently needed in the material conveying process. The core focus is on reducing material pulsation during conveying and significantly improving the continuity and smoothness of material conveying. Therefore, the industry typically considers installing appropriate pulsation compensation devices in the conveying system.

[0003] Existing compensation devices, such as buffer tanks and accumulators, absorb or release some of the pulsating energy by providing additional volume space or elastic elements, which can alleviate severe pressure fluctuations to a certain extent and have a good effect on improving the smoothness of delivery. However, because the emulsion explosives being transported are high-viscosity materials with poor flowability, the pressure change rate within the pipeline is rapid, while the response speed for pressure transmission to the elastic elements to produce effective deformation is slow. This results in insufficient elimination or compensation of some pressure pulsations, ultimately leading to the inability to meet increasingly stringent production requirements for the weight accuracy of individual explosive cartridges. Therefore, there is an urgent need for a device that can combine coarse and fine adjustment functions to fully realize pulsation elimination or compensation, in order to adapt to complex working conditions and achieve high-precision and stable filling. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the deficiencies and defects mentioned in the background art above, and to provide a multi-stage compensation device that can accurately eliminate or compensate for pulsating pressure, has a simple structure, is easy and convenient to maintain, and is suitable for high-viscosity materials.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0006] A multi-stage compensation device includes a conveying pipeline for conveying fluid, and a coarse adjustment compensation mechanism and a fine adjustment compensation mechanism respectively disposed on the conveying pipeline. The coarse adjustment compensation mechanism includes a coarse adjustment elastic element that adjusts the pulsating pressure in the conveying pipeline by deformation, and a pressure coarse adjustment component for providing coarse adjustment back pressure to the coarse adjustment elastic element. The fine adjustment compensation mechanism includes a fine adjustment elastic element that adjusts the pulsating pressure in the conveying pipeline by deformation, and a pressure fine adjustment component for providing fine adjustment back pressure to the fine adjustment elastic element, wherein the fine adjustment back pressure is greater than the coarse adjustment back pressure. The coarse adjustment compensation mechanism, through the cooperation of the coarse adjustment elastic element and the pressure coarse adjustment component, has a low coarse adjustment back pressure and a large deformation of the coarse adjustment elastic element, which can effectively regulate the large pulsating pressure in the conveying pipeline and remove most of the pulsating components. At the same time, the fine adjustment compensation mechanism, through the cooperation of the fine adjustment elastic element and the pressure fine adjustment component, has a high fine adjustment back pressure and a small and rapid deformation of the fine adjustment elastic element, which can quickly and finely adjust the remaining small pulsating pressure. The two work together to effectively reduce the amount of material pulsation in the entire conveying process, thereby significantly improving the filling accuracy, making the weight of a single medicine roll closer to the target value, and reducing the problem of large weight deviation.

[0007] In the aforementioned multi-stage compensation device, preferably, the pipe wall of the conveying pipeline is provided with a coarse adjustment first opening and a fine adjustment first opening, the coarse adjustment elastic element is a coarse adjustment elastic diaphragm laid at the coarse adjustment first opening, the pressure coarse adjustment component is located on the side of the coarse adjustment elastic diaphragm away from the conveying pipeline, the fine adjustment elastic element is a fine adjustment elastic diaphragm laid at the fine adjustment first opening, and the pressure fine adjustment component is located on the side of the fine adjustment elastic diaphragm away from the conveying pipeline. By placing the elastic diaphragm at the opening of the conveying pipeline, the contact area between the diaphragm and the material is increased. When the pulsating pressure of the material in the pipeline changes, the elastic diaphragm with a large contact area can sense the change more quickly and deform accordingly. This is especially beneficial for conveying high-viscosity materials such as emulsion explosives, which experience rapid pressure changes within the pipeline. It allows for a more timely response and handling of pulsations. Furthermore, due to the high viscosity and poor flowability of emulsion explosives, existing buffer devices often have dead zones, which can easily cause blockages. By placing the elastic diaphragm at the opening of the conveying pipeline, the material can remain in a continuous flow state, greatly reducing the risk of blockages, decreasing the probability of equipment failure and maintenance, and facilitating the daily flushing of residual sticky materials in the compensation device.

[0008] In the aforementioned multi-stage compensation device, preferably, the fine-tuning elastic diaphragm is thicker than the coarse-tuning elastic diaphragm. A thicker fine-tuning elastic diaphragm can better withstand higher back pressure and maintain stable deformation characteristics. Under high back pressure conditions, it can effectively adjust the pulsating pressure by a small amplitude, achieving fine compensation for material pulsation.

[0009] In the aforementioned multi-stage compensation device, preferably, a coarse adjustment concave base is provided on the outer side of the pipe wall of the conveying pipeline, and a second coarse adjustment opening is provided in the concave part of the coarse adjustment concave base. The size and position of the first coarse adjustment opening and the second coarse adjustment opening coincide. The coarse adjustment elastic diaphragm is attached to the coarse adjustment concave base. A fine adjustment concave base is also provided on the outer side of the pipe wall of the conveying pipeline, which is symmetrically arranged with the coarse adjustment concave base. The concave part of the fine adjustment concave base is provided with a second fine adjustment opening, and the size and position of the first fine adjustment opening and the second fine adjustment opening coincide. The fine adjustment elastic diaphragm is attached to the fine adjustment concave base. By setting a concave base and creating an opening at the connection between the concave base and the conveying pipeline, the elastic diaphragm can be attached to the opening and stably fixed to the concave base, preventing displacement or loosening during use. This also provides the elastic diaphragm with a larger effective deformation space and a larger contact area with the material, allowing for more precise adjustment of pressure changes within the pipeline. Furthermore, the concave base also acts as a limit for the elastic diaphragm, preventing excessive contraction during deformation. The symmetrical arrangement of the coarse and fine adjustment concave bases allows the coarse and fine adjustment elastic diaphragms to deform and adjust independently within their respective spaces without interference. This ensures that the coarse and fine adjustment elastic diaphragms synchronously sense and respond to pressure changes, effectively compensating for material pulsation and fostering better synergy between them.

[0010] In the aforementioned multi-stage compensation device, preferably, the pressure coarse adjustment assembly includes a coarse adjustment cover over the coarse adjustment elastic diaphragm, with a coarse adjustment pressure chamber formed between the coarse adjustment cover and the coarse adjustment elastic diaphragm. The coarse adjustment pressure chamber is connected to a coarse adjustment air tank via a coarse adjustment connecting pipe. The pressure fine adjustment assembly includes a fine adjustment cover over the fine adjustment elastic diaphragm, with a fine adjustment pressure chamber formed between the fine adjustment cover and the fine adjustment elastic diaphragm. The fine adjustment pressure chamber is connected to a fine adjustment air tank via a fine adjustment connecting pipe. By setting up the air tank, the pressure can be effectively buffered and stabilized, making back pressure adjustment more flexible and convenient. Operators can adjust the pressure in the air tank to change the back pressure in the coarse and fine adjustment pressure chambers based on factors such as material flow rate, pressure changes, and required filling accuracy during production, thereby achieving precise control of the elastic diaphragm deformation and achieving the best compensation effect.

[0011] In the aforementioned multi-stage compensation device, preferably, a coarse adjustment speed control valve is provided between the coarse adjustment connecting pipe and the coarse adjustment gas storage tank, and a fine adjustment speed control valve is provided between the fine adjustment connecting pipe and the fine adjustment gas storage tank. The flow opening of the coarse adjustment speed control valve is greater than that of the fine adjustment speed control valve. The larger flow opening of the coarse adjustment speed control valve allows for rapid adjustment of the pressure within the coarse adjustment pressure chamber, enabling the coarse adjustment elastic diaphragm to respond promptly to large-scale pulsating pressure changes in the material, achieving rapid pressure compensation and effectively handling large-flow-rate pressure fluctuations during the conveying process. The smaller flow opening of the fine adjustment speed control valve allows for fine-tuning of the pressure within the fine adjustment pressure chamber, enabling the fine adjustment elastic diaphragm to accurately compensate for pressure pulsations that were not adequately adjusted by the coarse adjustment.

[0012] In the aforementioned multi-stage compensation device, preferably, the coarse adjustment cover is equipped with a pressure detection instrument for displaying the pressure of the coarse adjustment pressure chamber. The pressure detection instrument allows for real-time display of the pressure value within the coarse adjustment pressure chamber, enabling operators to intuitively understand pressure changes in the chamber and promptly grasp the equipment's operating status.

[0013] In the aforementioned multi-stage compensation device, preferably, multiple sets of the fine-tuning compensation mechanism are provided on the conveying pipeline. By setting multiple sets of fine-tuning compensation mechanisms, their synergistic effect allows for more precise compensation, ensuring a more accurate and consistent filling weight for each medication roll.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] This invention incorporates both a coarse adjustment compensation mechanism and a fine adjustment compensation mechanism. The coarse adjustment compensation mechanism eliminates or compensates for most of the pulsating pressure, while the fine adjustment compensation mechanism quickly and accurately eliminates or compensates for any pulsating pressure that is not eliminated or compensated in a timely manner. The synergistic effect of the two mechanisms results in smoother material transport, significantly improved filling accuracy, and a single pill weight that is closer to the target value, reducing weight deviation and improving product quality consistency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the multi-stage compensation device in the embodiment.

[0018] Figure 2 A three-dimensional structural diagram of a portion of the multi-stage compensation device in an embodiment;

[0019] Figure 3 This is a front view of a portion of the multi-level compensation device structure in the embodiment;

[0020] Figure 4 for Figure 3 Cross-sectional view at point AA;

[0021] Figure 5 A left view of a portion of the multi-stage compensation device structure in the embodiment;

[0022] Figure 6 This is a schematic diagram of the normal pressure delivery state of the multi-stage compensation device in the embodiment.

[0023] Figure 7 This is a schematic diagram of the pressure increase conveying state of the multi-stage compensation device in an embodiment.

[0024] Figure 8 This is a schematic diagram of the pressure reduction conveying state of the multi-stage compensation device in an embodiment.

[0025] Legend

[0026] 1. Conveying pipeline; 11. Coarse adjustment first opening; 12. Fine adjustment first opening; 13. Material inlet; 14. Material outlet; 2. Coarse adjustment compensation mechanism; 21. Coarse adjustment elastic diaphragm; 22. Pressure coarse adjustment assembly; 221. Coarse adjustment cover; 2211. Pressure measuring instrument; 222. Coarse adjustment connecting pipe; 223. Coarse adjustment air tank; 2231. Coarse adjustment air pressure gauge; 224. Coarse adjustment speed control valve; 225. Coarse adjustment pressure... 23. Compressed air inlet / outlet; 231. Coarse adjustment concave base; 231. Coarse adjustment second opening; 3. Fine adjustment compensation mechanism; 31. Fine adjustment elastic diaphragm; 32. Pressure fine adjustment assembly; 321. Fine adjustment protective cover; 3231. Fine adjustment pressure gauge; 322. Fine adjustment connecting pipe; 323. Fine adjustment air tank; 324. Fine adjustment speed control valve; 325. Fine adjustment compressed air inlet / outlet; 33. Fine adjustment concave base; 331. Fine adjustment second opening. Detailed Implementation

[0027] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0028] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0029] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0030] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0031] Example:

[0032] like Figures 1 to 8 As shown, the multi-stage compensation device of this embodiment includes a conveying pipe 1 for conveying fluid, and a coarse adjustment compensation mechanism 2 and a fine adjustment compensation mechanism 3 respectively disposed on the conveying pipe 1. The coarse adjustment compensation mechanism 2 includes a coarse adjustment elastic element that adjusts the pulsating pressure in the conveying pipe 1 by deformation, and a pressure coarse adjustment component 22 for providing coarse adjustment back pressure to the coarse adjustment elastic element. The fine adjustment compensation mechanism 3 includes a fine adjustment elastic element that adjusts the pulsating pressure in the conveying pipe 1 by deformation, and a pressure fine adjustment component 32 for providing fine adjustment back pressure to the fine adjustment elastic element. The fine adjustment back pressure is greater than the coarse adjustment back pressure.

[0033] In this embodiment, as Figure 4 As shown, the pipe wall of the conveying pipe 1 is provided with a coarse adjustment first opening 11 and a fine adjustment first opening 12. The coarse adjustment elastic element is a coarse adjustment elastic diaphragm 21 laid at the coarse adjustment first opening 11, and the pressure coarse adjustment component 22 is located on the side of the coarse adjustment elastic diaphragm 21 away from the conveying pipe 1. The fine adjustment elastic element is a fine adjustment elastic diaphragm 31 laid at the fine adjustment first opening 12, and the pressure fine adjustment component 32 is located on the side of the fine adjustment elastic diaphragm 31 away from the conveying pipe 1.

[0034] In this embodiment, the fine-tuning elastic diaphragm 31 is thicker than the coarse-tuning elastic diaphragm 21. The coarse-tuning elastic diaphragm 21 is a single diaphragm, while the fine-tuning elastic diaphragm 31 is composed of two single diaphragms laminated and stacked together. In other embodiments, the number and thickness of the fine-tuning elastic diaphragm 31 can be adjusted according to specific needs.

[0035] In this embodiment, as Figure 3 and Figure 4 As shown, the outer side of the conveying pipe 1 is provided with a coarse adjustment concave base 23. The concave part of the coarse adjustment concave base 23 is provided with a coarse adjustment second opening 231. The size and position of the coarse adjustment first opening 11 and the coarse adjustment second opening 231 coincide. The coarse adjustment elastic diaphragm 21 is attached to the coarse adjustment concave base 23. The outer side of the conveying pipe 1 is also provided with a fine adjustment concave base 33 symmetrically arranged with the coarse adjustment concave base 23. The concave part of the fine adjustment concave base 33 is provided with a fine adjustment second opening 331. The size and position of the fine adjustment first opening 12 and the fine adjustment second opening 331 coincide. The fine adjustment elastic diaphragm 31 is attached to the fine adjustment concave base 33.

[0036] In this embodiment, as Figure 1 and Figure 4 As shown, the pressure coarse adjustment assembly 22 includes a coarse adjustment cover 221 covering the coarse adjustment elastic diaphragm 21, and a coarse adjustment pressure chamber is formed between the coarse adjustment cover 221 and the coarse adjustment elastic diaphragm 21. The coarse adjustment pressure chamber is connected to a coarse adjustment air tank 223 through a coarse adjustment connecting pipe 222. The pressure fine adjustment assembly 32 includes a fine adjustment cover 321 covering the fine adjustment elastic diaphragm 31, and a fine adjustment pressure chamber is formed between the fine adjustment cover 321 and the fine adjustment elastic diaphragm 31. The fine adjustment pressure chamber is connected to a fine adjustment air tank 323 through a fine adjustment connecting pipe 322.

[0037] In this embodiment, as Figure 1 As shown, a coarse adjustment speed control valve 224 is provided between the coarse adjustment connecting pipe 222 and the coarse adjustment gas storage tank 223, and a fine adjustment speed control valve 324 is provided between the fine adjustment connecting pipe 322 and the fine adjustment gas storage tank 323. The flow opening of the coarse adjustment speed control valve 224 is greater than the flow opening of the fine adjustment speed control valve 324.

[0038] In this embodiment, specifically, the coarse adjustment pressure chamber and the fine adjustment pressure chamber are filled with compressed air. The coarse adjustment cover 221 is provided with a coarse adjustment compressed air inlet and outlet 225, which are sequentially connected to a coarse adjustment connecting pipe 222, a coarse adjustment speed control valve 224, a coarse adjustment air tank 223, a pressure regulating valve with backflow relief function, a control valve, and a high-pressure air source. The fine adjustment cover 321 is provided with a fine adjustment compressed air inlet and outlet 325, which are sequentially connected to a fine adjustment connecting pipe 322, a fine adjustment speed control valve 324, a fine adjustment air tank 323, a pressure regulating valve with backflow relief function, a control valve, and a high-pressure air source. In other embodiments, the coarse adjustment pressure chamber and the fine adjustment pressure chamber may be filled with a medium such as water or oil at a certain pressure.

[0039] In this embodiment, the coarse adjustment cover 221 is equipped with a pressure detection instrument 2211 for displaying the pressure of the coarse adjustment pressure chamber. The coarse adjustment gas storage tank 223 is equipped with a coarse adjustment pressure gauge 2231, and the fine adjustment gas storage tank 323 is equipped with a fine adjustment pressure gauge 3231.

[0040] In this embodiment, the fine-tuning compensation mechanism 3 is provided with multiple sets on the conveying pipeline 1, and can be designed with two to ten sets. The more sets there are, the more accurate the adjustment and compensation will be.

[0041] In this embodiment, the specific working principle is as follows: the material flows from the material inlet 13 to the material outlet 14 of the conveying pipe 1. When the material passes through the coarse adjustment first opening 11 and the fine adjustment first opening 12 at the same time, the material comes into contact with the coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31 over a large area at the same time. The pressure change of the conveying pipe 1 is sensitively fed back to the coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31. Therefore, the pressure generated by the flow in the conveying pipe 1 will be applied to the coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31. However, since the coarse adjustment back pressure and the fine adjustment back pressure are applied in the coarse adjustment pressure chamber and the fine adjustment pressure chamber respectively, the coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31 will be in a pressure balance state at this time. During the conveying process, when the material conveying flow rate of conveying pipeline 1 increases, the corresponding internal pressure of the material will also increase. The coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31 will deform towards the coarse adjustment cover 221 and the fine adjustment cover 321 respectively to eliminate the increased pressure, so that the material flows out of the material outlet 14 of conveying pipeline 1 and maintains a relatively constant value. Conversely, when the material conveying flow rate of conveying pipeline 1 decreases, the corresponding internal pressure of the material will also decrease. The coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31 will deform towards the inside of conveying pipeline 1 to compensate for the reduced pressure, so that the material flows out of the material outlet 14 of conveying pipeline 1 and still maintains a relatively constant value, thereby achieving the purpose of reducing flow pulsation and increasing flow velocity stability.

[0042] In this embodiment, the specific working process is illustrated with an example:

[0043] Baseline state, such as Figure 6 As shown, when the material flows from the material inlet 13 to the material outlet 14 of the conveying pipeline 1, assuming the pressure of the conveying pipeline 1 under normal conveying conditions is 0.5MPa, by applying preset coarse adjustment back pressure and fine adjustment back pressure (where the fine adjustment back pressure is greater than the coarse adjustment back pressure) to the coarse adjustment pressure chamber and the fine adjustment pressure chamber respectively, the coarse adjustment elastic diaphragm 21 and the fine adjustment elastic diaphragm 31 are in a pressure balance state, thereby stabilizing the output pressure of 0.5MPa.

[0044] State of increased pressure, such as Figure 7 As shown, for example, when the pressure during delivery suddenly increases to 0.6 MPa, ideally, only the deformation of the coarse-adjustment elastic diaphragm 21 is needed to release 0.1 MPa. However, due to the high viscosity of the material causing a rapid pressure change rate within the pipeline, and the diaphragm response exhibiting lag, the coarse-adjustment elastic diaphragm 21 actually only releases 0.08 MPa, leaving 0.02 MPa unresolved. At this point, the fine-adjustment elastic diaphragm 31 comes into play. Due to its higher back pressure and double-diaphragm design, its deformation response is more sensitive and smaller. By precisely controlling the pressure of the fine-adjustment gas storage tank 323, the fine-adjustment elastic diaphragm 31 can quickly deform and release the remaining 0.02 MPa of pressure, ensuring that the output pressure remains stable at 0.5 MPa.

[0045] State of reduced pressure, such as Figure 8 As shown, for example, when the pressure during conveying suddenly drops to 0.4 MPa, ideally the coarse adjustment diaphragm 21 should deform to compensate for 0.1 MPa. However, due to the viscosity of the material and the response hysteresis, the coarse adjustment diaphragm 21 only compensates for 0.08 MPa, leaving 0.02 MPa uncompensated. The fine adjustment diaphragm 31 then undergoes a small deformation to supplement the 0.02 MPa pressure compensation, ultimately ensuring that the output pressure is stably maintained at 0.5 MPa.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage compensation device, comprising a conveying pipe (1) for conveying fluid, characterized in that, It also includes a coarse adjustment compensation mechanism (2) and a fine adjustment compensation mechanism (3) respectively provided on the conveying pipeline (1). The coarse adjustment compensation mechanism (2) includes a coarse adjustment elastic element that adjusts the pulsating pressure in the conveying pipeline (1) by deformation, and a pressure coarse adjustment component (22) for providing coarse adjustment back pressure to the coarse adjustment elastic element. The fine adjustment compensation mechanism (3) includes a fine adjustment elastic element that adjusts the pulsating pressure in the conveying pipeline (1) by deformation, and a pressure fine adjustment component (32) for providing fine adjustment back pressure to the fine adjustment elastic element. The fine adjustment back pressure is greater than the coarse adjustment back pressure.

2. The multi-stage compensation device according to claim 1, characterized in that, The conveying pipe (1) has a coarse adjustment first opening (11) and a fine adjustment first opening (12) on its pipe wall. The coarse adjustment elastic element is a coarse adjustment elastic diaphragm (21) laid at the coarse adjustment first opening (11). The pressure coarse adjustment component (22) is located on the side of the coarse adjustment elastic diaphragm (21) away from the conveying pipe (1). The fine adjustment elastic element is a fine adjustment elastic diaphragm (31) laid at the fine adjustment first opening (12). The pressure fine adjustment component (32) is located on the side of the fine adjustment elastic diaphragm (31) away from the conveying pipe (1).

3. The multi-stage compensation device according to claim 2, characterized in that, The fine-tuning elastic diaphragm (31) is thicker than the coarse-tuning elastic diaphragm (21).

4. The multi-stage compensation device according to claim 2, characterized in that, The outer side of the pipe wall of the conveying pipe (1) is provided with a coarse adjustment concave base (23). The concave part of the coarse adjustment concave base (23) is provided with a coarse adjustment second opening (231). The size and position of the coarse adjustment first opening (11) and the coarse adjustment second opening (231) coincide. The coarse adjustment elastic diaphragm (21) is attached to the coarse adjustment concave base (23). The outer side of the pipe wall of the conveying pipe (1) is also provided with a fine adjustment concave base (33) symmetrically arranged with the coarse adjustment concave base (23). The concave part of the fine adjustment concave base (33) is provided with a fine adjustment second opening (331). The size and position of the fine adjustment first opening (12) and the fine adjustment second opening (331) coincide. The fine adjustment elastic diaphragm (31) is attached to the fine adjustment concave base (33).

5. The multi-stage compensation device according to claim 2, characterized in that, The pressure coarse adjustment assembly (22) includes a coarse adjustment cover (221) covering the coarse adjustment elastic diaphragm (21), and a coarse adjustment pressure chamber is formed between the coarse adjustment cover (221) and the coarse adjustment elastic diaphragm (21). The coarse adjustment pressure chamber is connected to a coarse adjustment gas tank (223) through a coarse adjustment connecting pipe (222). The pressure fine adjustment assembly (32) includes a fine adjustment cover (321) covering the fine adjustment elastic diaphragm (31), and a fine adjustment pressure chamber is formed between the fine adjustment cover (321) and the fine adjustment elastic diaphragm (31). The fine adjustment pressure chamber is connected to a fine adjustment gas tank (323) through a fine adjustment connecting pipe (322).

6. The multi-stage compensation device according to claim 5, characterized in that, A coarse adjustment speed control valve (224) is provided between the coarse adjustment connecting pipe (222) and the coarse adjustment gas storage tank (223), and a fine adjustment speed control valve (324) is provided between the fine adjustment connecting pipe (322) and the fine adjustment gas storage tank (323). The flow opening of the coarse adjustment speed control valve (224) is greater than the flow opening of the fine adjustment speed control valve (324).

7. The multi-stage compensation device according to claim 5, characterized in that, The coarse adjustment cover (221) is equipped with a pressure detection instrument (2211) for displaying the pressure of the coarse adjustment pressure chamber.

8. The multi-stage compensation device according to any one of claims 1-7, characterized in that, The fine-tuning compensation mechanism (3) is provided in multiple sets on the conveying pipeline (1).

Images