Pressure stabilizing device for emulsion explosive conveying

Abstract

The invention discloses a pressure stabilizing device for emulsion explosive conveying, which comprises a first pressure stabilizing mechanism which is arranged between a conveying pump and a conveying pipeline and is used for adjusting pulsating pressure at an outlet of the conveying pump, and a second pressure stabilizing mechanism which is arranged at the outlet of the conveying pipeline and is used for adjusting residual pulsating pressure, the first pressure stabilizing mechanism comprises a conveying hose assembly and an outer sleeve, the two ends of the conveying hose assembly are communicated with an outlet of the conveying pump and the conveying pipeline respectively, the conveying hose assembly is sleeved with the outer sleeve, a buffer pressure cavity is formed between the conveying hose assembly and the outer sleeve, and the buffer pressure cavity is provided with buffer preset backpressure. The conveying hose assembly comprises an inner-layer hose and an outer-layer hose which are coaxially arranged, the space between the inner-layer hose and the outer-layer hose is filled with an incompressible medium, a limiting sleeve is arranged between the inner-layer hose and the outer-layer hose, and a medium flowing channel is formed in the limiting sleeve. According to the invention, the material conveying pulsating quantity is effectively reduced, and the filling precision is obviously improved.

Description

Technical Field

[0001] This invention belongs to the field of packaging and conveying, and particularly relates to a pressure stabilizing device. Background Technology

[0002] In the civil explosives emulsion packaging industry, with the continuous improvement of automation levels, higher requirements are placed 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.

[0003] Currently, twin-piston pumps used in emulsion charging machines are employed for explosive delivery due to their relatively low operating speed, low friction speed, and high safety. However, when the two piston cylinders alternately deliver material, instantaneous pressure spikes inevitably occur. To address this issue, a buffer is typically installed at the pump outlet to absorb and eliminate these pressure pulsations in a timely manner.

[0004] However, due to the limited pressure-bearing capacity of the elastic element of the buffer, instantaneous pressure spikes can easily cause damage to the elastic element. Furthermore, since the emulsion explosive being transported is a high-viscosity material with high viscosity and poor flowability, the pressure wave is transmitted to the elastic element relatively slowly in the viscous material. Moreover, the damping effect caused by high viscosity will prevent the elastic element from generating sufficiently fast and effective deformation to completely absorb the pulsating energy. The buffer's absorption and replenishment of pressure pulsations are insufficient, causing the remaining pulsating pressure to affect the stability of the outlet pressure of the discharge pipe, resulting in weight fluctuations of a single explosive cartridge, making it impossible to meet increasingly stringent production requirements in terms of accuracy. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the background art above, and to provide a pressure stabilizing device for conveying emulsion explosives that can quickly and timely absorb pressure spikes at the pump outlet while being less prone to damage, fully eliminating pulsation, and stabilizing the discharge pipe pressure.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows: A pressure stabilizing device for conveying emulsion explosives includes a first pressure stabilizing mechanism disposed between a conveying pump and a conveying pipeline for adjusting the pulsating pressure at the outlet of the conveying pump, and a second pressure stabilizing mechanism disposed at the outlet of the conveying pipeline for adjusting the remaining pulsating pressure. The first pressure stabilizing mechanism includes a conveying hose assembly with its two ends respectively connected to the outlet of the conveying pump and the conveying pipeline, and an outer sleeve sleeved over the conveying hose assembly. A buffer pressure chamber is formed between the conveying hose assembly and the outer sleeve, and the buffer pressure chamber is provided with a buffer preset back pressure. The conveying hose assembly includes an inner hose and an outer hose arranged coaxially, and an incompressible medium is filled between the inner hose and the outer hose. A limiting sleeve is provided between the inner hose and the outer hose, and the limiting sleeve is provided with a medium flow channel. The first pressure stabilizing mechanism installed at the outlet of the delivery pump can eliminate most of the pulsating pressure, while the second pressure stabilizing mechanism installed at the outlet of the delivery pipeline can quickly and precisely adjust the remaining small pulsating pressure. The two work together to effectively reduce the amount of material pulsation during the entire delivery process, thereby significantly improving filling accuracy and making the weight of a single medicine roll closer to the target value, reducing the problem of large weight deviation. Secondly, the first pressure stabilizing mechanism ensures that the inner and outer hoses deform synchronously through the incompressible medium filling between them, forming an integral hose structure. This deformation effectively regulates the pressure pulsation during material delivery. The limiting sleeve provided in between offers bidirectional limiting protection. When the integral hose expands outward, the inner hose abuts against the inner wall of the limiting sleeve to prevent excessive expansion, achieving external limiting. Conversely, when the integral hose deforms and contracts inward, the outer hose abuts against the outer wall of the limiting sleeve to prevent excessive contraction, achieving internal limiting. With this design, the limiting structure is placed outside the material flow channel, ensuring unobstructed and smooth material flow within the channel, eliminating the risk of stagnation, hardening, and blockage, and significantly enhancing the hose's pressure resistance and durability against deformation and breakage.

[0007] In the aforementioned pressure stabilizing device, preferably, the second pressure stabilizing mechanism includes a connecting pipe connected to the outlet of the conveying pipe. A first compensation component and a second compensation component are symmetrically arranged on the connecting pipe. The first compensation component includes a first elastic diaphragm that adjusts the pulsating pressure within the connecting pipe by deformation, and a first pressure regulating component for providing a first preset back pressure to the first elastic diaphragm. The first preset back pressure is greater than the buffer preset back pressure. The second compensation component includes a second elastic diaphragm that adjusts the pulsating pressure within the connecting pipe by deformation, and a second pressure regulating component for providing a second preset back pressure to the second elastic diaphragm. The second preset back pressure is greater than the first preset back pressure. With this arrangement, the buffer preset back pressure of the first pressure stabilizing mechanism is minimized, and the deformation of the conveying hose assembly is maximized, which can eliminate most of the pulsating pressure at the outlet of the conveying pump. The first preset back pressure of the first compensation component is relatively large, and the deformation of the first elastic diaphragm is small and rapid, which can further eliminate the remaining pulsating pressure. The second preset back pressure of the symmetrically arranged second compensation components is the largest, which can further and accurately eliminate the pulsating pressure that was not eliminated by the first compensation component, thereby stabilizing the outlet pressure of the discharge pipe and reducing the problem of large weight deviation.

[0008] In the aforementioned pressure stabilizing device, preferably, the connecting pipe wall is provided with a first opening and a second opening, the first elastic diaphragm is laid at the first opening, the second elastic diaphragm is laid at the second opening, the first pressure regulating component includes a first protective cover covering the first elastic diaphragm, and a first pressure chamber is formed between the first protective cover and the first elastic diaphragm, and the second pressure regulating component includes a second protective cover covering the second elastic diaphragm, and a second pressure chamber is formed between the second protective cover and the second elastic diaphragm. By placing the elastic diaphragm at the opening of the connecting pipe, the contact area between the diaphragm and the material is increased. When the pulsating pressure of the material in the pipe 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 in the pipe. It allows for a more timely response and handling of pulsations. In addition, because emulsion explosives have high viscosity and poor flowability, existing buffer devices often have dead zones, which can easily cause blockages. By placing the elastic diaphragm at the opening of the conveying pipe, 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.

[0009] In the aforementioned pressure stabilizing device, preferably, the first pressure regulating component further includes a first air storage tank connected to the first pressure chamber, and the second pressure regulating component further includes a second air storage tank connected to the second pressure chamber. The buffer pressure chamber is connected to a buffer air storage tank. By setting up air storage tanks, the pressure can be effectively buffered and stabilized, and the back pressure adjustment is made more flexible and convenient. Operators can adjust the pressure in each air storage tank to change the back pressure in each pressure chamber according to factors such as the material conveying flow rate, pressure changes, and required filling accuracy during the production process, thereby achieving precise control over the deformation degree of the elastic element and achieving the best compensation effect.

[0010] Preferably, in the aforementioned pressure stabilizing device, the first pressure stabilizing mechanism further includes a connector assembly with one end connected to the outlet of the delivery pump and the other end connected to the delivery pipeline. The two ends of the delivery hose assembly and the outer sleeve are respectively fixed to the connector assembly, and both ends of the delivery hose assembly and the outer sleeve are sealed to the connector assembly. By providing the connector assembly, the sealing performance of the delivery hose assembly and the outer sleeve is ensured, while the installation process of the buffer device is simplified, and a stable connection between the buffer device and the delivery pump and the delivery pipeline is guaranteed.

[0011] In the aforementioned pressure stabilizing device, preferably, the connector assembly includes a connector tube body, a connecting limiting boss, and a flange. The inner flexible hose is sealed and sleeved on one end of the connector tube body, and the other end of the connector tube body is connected to the outlet of the delivery pump / the delivery pipeline. The connecting limiting boss is fixed in the middle of the connector tube body, and the limiting sleeve is clamped on the connecting limiting boss. The end of the outer sleeve is provided with a radially inward limiting ring, and the outer flexible hose is clamped between the connecting limiting boss and the limiting ring. The flange, the outer sleeve, and the connecting limiting boss are all sealed and fixedly connected. With this configuration, the inner hose and the connecting pipe are almost the same diameter. When material enters the inner hose from the connecting pipe, it minimizes the obstruction caused by sudden changes in pipe diameter, ensuring smooth material flow and effectively preventing material stagnation and blockage at the connection point, thus ensuring the stability of the conveying process. Secondly, the connection limiting boss provides a stable fixing base for the limiting sleeve, allowing the limiting sleeve to be accurately installed in the predetermined position. At the same time, the inner sleeve has a certain deformation distance under the action of the limiting boss, which allows the inner sleeve to produce appropriate elastic deformation when subjected to pressure pulsation. Furthermore, the outer hose is tightly pressed against the connection limiting boss by the limiting ring, achieving a sealed clamping installation. This installation method is not only easy to operate but also ensures good sealing between the outer hose, the connecting pipe, and the outer sleeve, effectively preventing leakage.

[0012] In the aforementioned pressure stabilizing device, preferably, a hose clamp is provided at the connection between the inner hose and the connector pipe body. A limiting step is provided on one side of the connecting limiting boss, and the limiting sleeve is secured to the limiting step. The other side of the connecting limiting boss is sealed and fixedly connected to the flange. The hose clamp provides strong clamping force, ensuring a tight connection between the inner hose and the connector pipe body. This prevents the inner hose from loosening or falling off, effectively preventing material leakage at the connection point, ensuring the sealing of the material conveying channel, and effectively preventing leakage of incompressible media between the inner and outer hoses. The limiting step on one side of the connecting limiting boss precisely engages the limiting sleeve, effectively preventing axial and radial displacement of the limiting sleeve, ensuring its stable support and limiting function. The other side is fixedly connected to the flange, thus achieving a secure connection between the connector pipe body and the flange.

[0013] In the aforementioned pressure stabilizing device, preferably, the outer flexible hose has radially expanding retaining flanges at both ends. The retaining ring is pressed against the outer wall of the outer flexible hose, and the retaining flanges are clamped between the retaining ring and the flange. A sealing flange is provided on the side of the retaining flange closest to the flange, and the flange has a sealing groove that matches the sealing flange. The cooperation between the retaining flanges, the retaining ring, and the flange provides reliable axial positioning of the outer flexible hose. The retaining ring, pressed against the outer wall of the outer flexible hose, works in conjunction with the retaining flanges to form a double sealing effect, improving the sealing reliability between the outer flexible hose and the flange. The sealing flange prevents incompressible media from leaking from the flange connection.

[0014] In the aforementioned pressure stabilizing device, preferably, the medium flow channel is a plurality of first liquid passage holes evenly distributed on the limiting sleeve. When the pressure changes, the incompressible medium can flow rapidly and uniformly between the inner and outer hoses, ensuring that the inner and outer hoses can deform synchronously. At the same time, the limiting sleeve can also provide uniform limiting strength, reducing component damage caused by excessive local stress.

[0015] In the aforementioned pressure stabilizing device, preferably, the medium flow channel is a plurality of second liquid passage holes located at both ends of the limiting sleeve. When the pressure changes significantly, and the inner and outer hoses deform synchronously, the middle part of the limiting sleeve experiences the greatest pressure. Since the middle part does not have liquid passage holes, its solid structure provides continuous and uniform radial support, enhancing the hose's resistance to rupture under high-pressure pulsation, while simultaneously ensuring the compressive strength of the middle part of the limiting sleeve.

[0016] Compared with the prior art, the advantages of the present invention are as follows: By employing a first pressure-stabilizing mechanism at the pump outlet and a second pressure-stabilizing mechanism at the pipeline outlet, the two mechanisms work synergistically to effectively eliminate most of the pulsating pressure and quickly and precisely adjust the remaining smaller pulsating pressures. This effectively reduces material pulsation throughout the entire conveying process, significantly improves filling accuracy, and makes the weight of a single pill closer to the target value, reducing the problem of large weight deviations. Secondly, the first pressure-stabilizing mechanism, through the incompressible medium filled between the inner and outer hoses, ensures that both deform synchronously, forming a unified hose structure. This deformation effectively regulates the material conveying pressure pulsation. A limiting sleeve provides bidirectional limiting protection. When the unified hose expands outward, the inner hose abuts against the inner wall of the limiting sleeve to prevent excessive expansion, achieving external limiting; conversely, when the unified hose deforms inward and contracts, the outer hose abuts against the outer wall of the limiting sleeve to prevent excessive contraction, achieving internal limiting. The limiting structure is placed outside the material flow channel, which not only ensures that the material flows smoothly and without obstruction in the flow channel, eliminating the risk of stagnation, hardening and blockage, but also significantly enhances the pressure resistance and durability of the hose against deformation and damage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the pressure stabilizing device for conveying emulsion explosives in Example 1; Figure 2 This is a three-dimensional structural schematic diagram of the first voltage stabilizing mechanism in Embodiment 1; Figure 3 This is a cross-sectional structural schematic diagram of the first voltage stabilizing mechanism in Embodiment 1; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the limiting sleeve structure in Example 1; Figure 6 This is a three-dimensional structural diagram of the second voltage stabilizing mechanism in Embodiment 1; Figure 7 This is a left view of the second voltage stabilizing mechanism in Embodiment 1; Figure 8 This is a front view of the second voltage stabilizing mechanism in Embodiment 1; Figure 9 for Figure 8 Cross-sectional view at point AA; Figure 10This is a schematic diagram of the limiting sleeve structure in Example 2.

[0019] Legend 1. First pressure stabilizing mechanism; 11. Delivery hose assembly; 111. Inner hose; 1111. Hose clamp; 112. Limiting sleeve; 1121. First liquid passage hole; 1122. Second liquid passage hole; 113. Outer hose; 1131. Locking flange; 1132. Sealing flange; 12. Outer sleeve; 121. Limiting retaining ring; 122. First pressure gauge; 123. Compressed medium inlet / outlet; 124. Injection port; 13. Connector assembly; 131. Connector body; 132. Connecting limiting boss; 1321. Limiting step; 1322. Seal; 133. Flange; 14. Buffer gas tank; 15. Buffer connection 1. Connecting pipe; 2. Second pressure stabilizing mechanism; 21. Connecting pipe; 211. First opening; 212. Second opening; 213. First concave base; 214. Second concave base; 22. First compensation component; 221. First elastic diaphragm; 222. First pressure regulating component; 2221. First protective cover; 22211. Second pressure gauge; 2222. First air storage tank; 2223. First connecting pipe; 23. Second compensation component; 231. Second elastic diaphragm; 232. Second pressure regulating component; 2321. Second protective cover; 2322. Second air storage tank; 2323. Second connecting pipe; 3. Delivery pump; 4. Delivery pipe. Detailed Implementation

[0020] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0021] 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.

[0022] 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 the invention.

[0023] 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.

[0024] Example 1: like Figures 1 to 9As shown, the pressure stabilizing device for conveying emulsion explosives in this embodiment includes a first pressure stabilizing mechanism 1 disposed between the conveying pump 3 and the conveying pipeline 4 for adjusting the pulsating pressure at the outlet of the conveying pump 3, and a second pressure stabilizing mechanism 2 disposed at the outlet of the conveying pipeline 4 for adjusting the remaining pulsating pressure. The first pressure stabilizing mechanism 1 includes a conveying hose assembly 11 with its two ends connected to the outlet of the conveying pump 3 and the conveying pipeline 4, respectively, and an outer sleeve 12 sleeved outside the conveying hose assembly 11. A buffer pressure chamber is formed between the conveying hose assembly 11 and the outer sleeve 12. The buffer pressure chamber is provided with a buffer preset back pressure. The conveying hose assembly 11 includes an inner hose 111 and an outer hose 113 coaxially arranged. An incompressible medium is filled between the inner hose 111 and the outer hose 113, and a limiting sleeve 112 is provided between the inner hose 111 and the outer hose 113. The limiting sleeve 112 is provided with a medium flow channel.

[0025] In this embodiment, as Figures 6 to 9 As shown, the second pressure stabilizing mechanism 2 includes a connecting pipe 21 connected to the outlet of the conveying pipe 4. A first compensation component 22 and a second compensation component 23 are symmetrically arranged on the connecting pipe 21. The first compensation component 22 includes a first elastic diaphragm 221 that adjusts the pulsating pressure inside the connecting pipe 21 by deformation, and a first pressure regulating component 222 for providing a first preset back pressure to the first elastic diaphragm 221. The first preset back pressure is greater than the buffer preset back pressure. The second compensation component 23 includes a second elastic diaphragm 231 that adjusts the pulsating pressure inside the connecting pipe 21 by deformation, and a second pressure regulating component 232 for providing a second preset back pressure to the second elastic diaphragm 231. The second preset back pressure is greater than the first preset back pressure.

[0026] In this embodiment, the pipe wall of the connecting pipe 21 is provided with a first opening 211 and a second opening 212. A first elastic diaphragm 221 is laid at the first opening 211, and a second elastic diaphragm 231 is laid at the second opening 212. The first pressure regulating component 222 includes a first protective cover 2221 covering the first elastic diaphragm 221, and a first pressure chamber is formed between the first protective cover 2221 and the first elastic diaphragm 221. The second pressure regulating component 232 includes a second protective cover 2321 covering the second elastic diaphragm 231, and a second pressure chamber is formed between the second protective cover 2321 and the second elastic diaphragm 231.

[0027] In this embodiment, the second elastic diaphragm 231 is thicker than the first elastic diaphragm 221. The first elastic diaphragm 221 is a single diaphragm, while the second elastic diaphragm 231 is composed of two single diaphragms laminated and stacked together. In other embodiments, the number and thickness of the second elastic diaphragm 231 can be adjusted according to specific needs. A thicker 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.

[0028] In this embodiment, a first concave base 213 is provided around the first opening 211 on the outer side of the pipe wall of the connecting pipe 21, and a first elastic diaphragm 221 is attached to the first concave base 213. A second concave base 214 is also provided on the outer side of the pipe wall of the connecting pipe 21, which is symmetrically arranged with the first concave base 213, and a second elastic diaphragm 231 is attached to the second concave base 214. By setting a concave base, the elastic diaphragm can be attached to the opening and stably fixed on the concave base, preventing displacement or loosening of the diaphragm during use. It also provides the elastic diaphragm with a larger effective deformation space and a larger contact area with the material, thus allowing for more precise regulation 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 first compensation component 22 and the second compensation component 23 allows the elastic diaphragms to deform and adjust independently within their respective spaces without interference. This ensures that the first elastic diaphragm 221 and the second elastic diaphragm 231 synchronously sense and respond to pressure changes, jointly and effectively compensating for material pulsations, forming a better synergistic effect.

[0029] In this embodiment, as Figure 1 As shown, the first pressure regulating assembly 222 further includes a first air storage tank 2222 connected to the first pressure chamber, and the second pressure regulating assembly 232 further includes a second air storage tank 2322 connected to the second pressure chamber. A buffer pressure chamber is connected to a buffer air storage tank 14. Specifically, the first pressure chamber is connected to the first air storage tank 2222 via a first connecting pipe 2223, the second pressure chamber is connected to the second air storage tank 2322 via a second connecting pipe 2323, and the buffer pressure chamber is connected to the buffer air storage tank 14 via a buffer connecting pipe 15.

[0030] In this embodiment, the first protective cover 2221 is provided with a second pressure gauge 22211 for displaying the pressure of the pressure chamber.

[0031] In this embodiment, as Figures 2 to 4As shown, the first pressure stabilizing mechanism 1 also includes a connector assembly 13 with one end connected to the outlet of the delivery pump 3 and the other end connected to the delivery pipeline 4. The two ends of the delivery hose assembly 11 and the outer sleeve 12 are respectively fixed to the connector assembly 13, and both ends of the delivery hose assembly 11 and the outer sleeve 12 are sealed on the connector assembly 13.

[0032] In this embodiment, the connector assembly 13 includes a connector tube 131, a connecting limiting boss 132, and a flange 133. The inner hose 111 is sealed and fitted at one end of the connector tube 131, and the other end of the connector tube 131 is connected to the outlet of the delivery pump 3 / delivery pipeline 4. The connecting limiting boss 132 is fixed at the middle position of the connector tube 131, and the limiting sleeve 112 is clamped on the connecting limiting boss 132. The end of the outer sleeve 12 is provided with a radially inward limiting ring 121. The outer hose 113 is clamped between the connecting limiting boss 132 and the limiting ring 121. The flange 133, the outer sleeve 12, and the connecting limiting boss 132 are all sealed and fixed.

[0033] In this embodiment, a hose clamp 1111 is provided at the connection between the inner hose 111 and the connector tube body 131. A limiting step 1321 is provided on one side of the connecting limiting boss 132. The limiting sleeve 112 is clamped on the limiting step 1321. The other side of the connecting limiting boss 132 is sealed and fixed to the flange 133.

[0034] In this embodiment, the outer flexible hose 113 has radially outwardly expanding locking flanges 1131 at both ends. The limiting ring 121 is pressed against the outer wall of the outer flexible hose 113. The locking flanges 1131 are clamped between the limiting ring 121 and the flange 133. The locking flange 1131 has a sealing flange 1132 on the side near the flange 133. The flange 133 has a sealing groove that matches the sealing flange 1132.

[0035] In this embodiment, a sealing element 1322 is provided on the side of the connecting limiting boss 132 near the flange 133.

[0036] In this embodiment, as Figure 5 As shown, the medium flow channel is a plurality of first liquid passage holes 1121 evenly distributed on the limiting sleeve 112.

[0037] In this embodiment, the outer sleeve 12 is provided with a first pressure gauge 122. The outer sleeve 12 is also provided with a compressible medium inlet / outlet 123, and the flange 133 is provided with a liquid injection port 124 for filling the space between the inner hose 111 and the outer hose 113 with an incompressible medium.

[0038] In this embodiment, the specific operating steps include: firstly, pre-filling the space between the outer sleeve 12 and the outer hose 113 with compressed gas through the compressed medium inlet / outlet 123, and setting the buffer preset back pressure value to 60%-80% of the expected working delivery pressure. At this time, the outer hose 113 deforms inward under the action of gas pressure. Then, filling the space between the inner hose 111 and the outer hose 113 with incompressible liquid through the injection port 124, and continuing to fill until the inner diameter of the inner hose 111 shrinks to about 80% of its free state inner diameter, so that the inner hose 111 and the outer hose 113 basically achieve synchronous inward deformation. After completion, the injection port 124 is closed, and then the pipeline pressure pulsation buffer device is installed at the outlet position of the dual piston pump.

[0039] The dual piston pump is started, and the pressure is applied to the inner hose 111 and transmitted to the outer hose 113. Under the action of the buffer preset back pressure, the inner hose 111 and the outer hose 113 expand and deform outward synchronously to reach the initial pressure balance state. Under the action of the first preset back pressure and the second preset back pressure, the first elastic diaphragm 221 and the second elastic diaphragm 231 are also in the pressure balance state.

[0040] When the conveying pressure increases instantaneously, the inner hose 111 and the outer hose 113 continue to expand outward synchronously, eliminating the increased pressure through expansion and deformation. Due to the high viscosity of the material, the pressure change rate inside the pipe is fast, but the conveying hose assembly 11 has a lag in response, and some pressure is not eliminated in time. When the material flows to the connecting pipe 21, the first elastic diaphragm 221 and the second elastic diaphragm 231 will deform towards the first protective cover 2221 and the second protective cover 2321 respectively, further eliminating the remaining increased pressure and keeping the material at a relatively constant value when it flows out.

[0041] When the conveying pressure decreases instantaneously, the inner hose 111 and the outer hose 113 contract inward synchronously to compensate for the reduced pressure through contraction and deformation. At this time, some pressure is not compensated in time. When the material flows to the connecting pipe 21, the first elastic diaphragm 221 and the second elastic diaphragm 231 will deform towards the inside of the connecting pipe 21 to further compensate for the reduced pressure, so that the material can still maintain a relatively constant value when it flows out, thereby reducing flow pulsation and increasing flow velocity stability.

[0042] In this embodiment, the specific working process is illustrated with an example: Under the baseline condition, assuming the pressure of the conveying pipeline 4 is 0.5 MPa under normal conveying conditions, by applying preset buffer back pressure, first preset back pressure and second preset back pressure (where the second preset back pressure is greater than the first preset back pressure and greater than the buffer preset back pressure) to the buffer pressure chamber, the first pressure chamber and the second pressure chamber respectively, the conveying hose assembly 11, the first elastic diaphragm 221 and the second elastic diaphragm 231 are in a pressure balance state, thereby stabilizing the output pressure of 0.5 MPa.

[0043] In situations where pressure increases, such as when the pressure during delivery suddenly rises to 0.6 MPa, ideally, only deformation of the delivery hose assembly 11 is needed to release 0.1 MPa. However, due to the high viscosity of the material causing a rapid rate of pressure change within the pipeline, and the diaphragm response exhibiting lag, the delivery hose assembly 11 actually only releases 0.07 MPa, leaving 0.03 MPa unresolved. At this point, the first elastic diaphragm 221 and the second elastic diaphragm 231 come into play. Their deformation response is more sensitive and smaller in amplitude. By precisely controlling the pressure of the corresponding gas storage tanks, the first elastic diaphragm 221 can quickly deform to release the remaining 0.02 MPa of pressure, while the second elastic diaphragm 231 can quickly deform to release the remaining 0.01 MPa of pressure, ensuring that the output pressure remains stable at 0.5 MPa.

[0044] In a pressure reduction state, such as when the pressure during delivery suddenly drops to 0.4 MPa, ideally the deformation of the delivery hose assembly 11 should compensate for 0.1 MPa. However, due to the viscosity of the material and the response lag, the delivery hose assembly 11 only compensates for 0.07 MPa, leaving 0.03 MPa uncompensated. The first elastic diaphragm 221 and the second elastic diaphragm 231 then undergo slight deformation. The first elastic diaphragm 221 compensates for 0.02 MPa of pressure, while the second elastic diaphragm 231 compensates for the remaining 0.01 MPa of pressure, ultimately ensuring that the output pressure is stably maintained at 0.5 MPa.

[0045] Example 2: like Figure 10 As shown, the pressure stabilizing device for conveying emulsion explosives in this embodiment is basically the same as that in Embodiment 1, except that the medium flow channel is a plurality of second liquid passage holes 1122 provided at both ends of the limiting sleeve 112. This further improves the hose's resistance to rupture under high pressure pulsation, while ensuring the compressive strength of the middle part of the limiting sleeve 112.

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

Claims

1. A pressure stabilizing device for conveying emulsion explosives, characterized in that, The system includes a first pressure stabilizing mechanism (1) located between the delivery pump (3) and the delivery pipeline (4) for adjusting the pulsating pressure at the outlet of the delivery pump (3), and a second pressure stabilizing mechanism (2) located at the outlet of the delivery pipeline (4) for adjusting the remaining pulsating pressure. The first pressure stabilizing mechanism (1) includes a delivery hose assembly (11) with its two ends connected to the outlet of the delivery pump (3) and the delivery pipeline (4) respectively, and an outer sleeve (12) sleeved over the delivery hose assembly (11). 11) A buffer pressure chamber is formed between the outer tube (12) and the outer tube. The buffer pressure chamber is provided with a buffer preset back pressure. The delivery hose assembly (11) includes an inner hose (111) and an outer hose (113) arranged coaxially. An incompressible medium is filled between the inner hose (111) and the outer hose (113). A limiting sleeve (112) is provided between the inner hose (111) and the outer hose (113). A medium flow channel is provided on the limiting sleeve (112).

2. The voltage stabilizing device according to claim 1, characterized in that, The second pressure stabilizing mechanism (2) includes a connecting pipe (21) connected to the outlet of the conveying pipe (4). A first compensation component (22) and a second compensation component (23) are symmetrically arranged on the connecting pipe (21). The first compensation component (22) includes a first elastic diaphragm (221) that adjusts the pulsating pressure in the connecting pipe (21) by deformation, and a first pressure regulating component (222) for providing a first preset back pressure to the first elastic diaphragm (221). The first preset back pressure is greater than the buffer preset back pressure. The second compensation component (23) includes a second elastic diaphragm (231) that adjusts the pulsating pressure in the connecting pipe (21) by deformation, and a second pressure regulating component (232) for providing a second preset back pressure to the second elastic diaphragm (231). The second preset back pressure is greater than the first preset back pressure.

3. The voltage stabilizing device according to claim 2, characterized in that, The connecting pipe (21) has a first opening (211) and a second opening (212) on its wall. The first elastic diaphragm (221) is laid at the first opening (211), and the second elastic diaphragm (231) is laid at the second opening (212). The first pressure regulating component (222) includes a first protective cover (2221) covering the first elastic diaphragm (221), and a first pressure chamber is formed between the first protective cover (2221) and the first elastic diaphragm (221). The second pressure regulating component (232) includes a second protective cover (2321) covering the second elastic diaphragm (231), and a second pressure chamber is formed between the second protective cover (2321) and the second elastic diaphragm (231).

4. The voltage stabilizing device according to claim 3, characterized in that, The first pressure regulating assembly (222) further includes a first gas storage tank (2222) connected to the first pressure chamber, and the second pressure regulating assembly (232) further includes a second gas storage tank (2322) connected to the second pressure chamber. The buffer pressure chamber is connected to a buffer gas storage tank (14).

5. The voltage stabilizing device according to claim 1, characterized in that, The first pressure stabilizing mechanism (1) further includes a connector assembly (13) with one end connected to the outlet of the delivery pump (3) and the other end connected to the delivery pipe (4). The two ends of the delivery hose assembly (11) and the outer sleeve (12) are respectively fixed to the connector assembly (13). The two ends of the delivery hose assembly (11) and the outer sleeve (12) are sealed on the connector assembly (13).

6. The voltage stabilizing device according to claim 5, characterized in that, The connector assembly (13) includes a connector body (131), a connecting limiting boss (132), and a flange (133). The inner hose (111) is sealed and fitted at one end of the connector body (131). The other end of the connector body (131) is connected to the outlet of the delivery pump (3) / the delivery pipeline (4). The connecting limiting boss (132) is fixed at the middle position of the connector body (131). The limiting sleeve (112) is clamped on the connecting limiting boss (132). The end of the outer sleeve (12) is provided with a radially inward limiting ring (121). The outer hose (113) is clamped between the connecting limiting boss (132) and the limiting ring (121). The flange (133), the outer sleeve (12), and the connecting limiting boss (132) are all sealed and fixed.

7. The voltage stabilizing device according to claim 6, characterized in that, The connection between the inner hose (111) and the connector tube (131) is surrounded by a hose clamp (1111). A limiting step (1321) is provided on one side of the connecting limiting boss (132). The limiting sleeve (112) is clamped on the limiting step (1321). The other side of the connecting limiting boss (132) is sealed and fixed to the flange (133).

8. The voltage stabilizing device according to claim 6, characterized in that, The outer flexible tube (113) has radially outwardly expanding locking flanges (1131) at both ends. The limiting ring (121) is pressed against the outer wall of the outer flexible tube (113). The locking flange (1131) is clamped between the limiting ring (121) and the flange (133). The locking flange (1131) has a sealing flange (1132) on the side near the flange (133). The flange (133) has a sealing groove that matches the sealing flange (1132).

9. The voltage stabilizing device according to any one of claims 1-8, characterized in that, The medium flow channel is a plurality of first liquid passage holes (1121) evenly distributed on the limiting sleeve (112).

10. The voltage stabilizing device according to any one of claims 1-8, characterized in that, The medium flow channel is a plurality of second liquid passage holes (1122) provided at both ends of the limiting sleeve (112).

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