A pipe-type pressure pulsation damper

Abstract

The utility model discloses a pipeline formula pressure pulsation buffer device, including two ends with outside fluid conveying pipeline intercommunication's conveying hose subassembly and the outer sleeve of setting in the conveying hose outside, the conveying hose subassembly with the outer sleeve between filling has compression medium, the conveying hose subassembly includes coaxial setting's inner tube and outer tube, the compression medium is located between the outer sleeve and the outer tube, the inner tube and outer tube between filling has incompressible medium, and the inner tube and outer tube between be equipped with the limit sleeve, be equipped with medium flow channel on the limit sleeve. The utility model discloses through adopting the inner and outer tube of coaxial setting and limit sleeve, has realized to the inner and outer two -way limit of hose deformation, has guaranteed conveying material smooth flow in the inner tube, has avoided the risk that the limit structure and material contact led to stagnation, hardening and block.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, and in particular relates to a pulsating buffer device. Background Technology

[0002] With the rapid development of industrial explosives packaging technology, the widespread application of high-speed fully automatic loading machines has significantly reduced personnel input in the loading process, effectively lowering the risk of personal injury accidents. However, high-speed loading machines place stringent requirements on the continuity, stability, and safety of industrial explosives delivery. Currently used dual-piston pumps are employed for explosives 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 fluctuations are unavoidable, leading to a small number of defective products during production.

[0003] To mitigate pressure pulsations in pipelines, existing technologies typically connect accumulators or pneumatic pulse dampers to the pipeline. This type of buffering requires material to be fed into the buffer device. This approach is suitable for fluids such as water and oil whose properties do not change significantly with pressure, temperature, or time. However, emulsion explosives are high-viscosity, creamy materials whose properties are extremely sensitive to temperature changes. If emulsion explosives remain in the accumulator or pneumatic pulse damper for too long, they are prone to hardening, which can clog the inlet of the buffer device and ultimately cause the buffering function to fail.

[0004] Pipeline-type pulsating buffer devices are considered one way to solve the aforementioned blockage problem. Their principle typically utilizes the compression and release of elastic rubber hoses to absorb pressure fluctuations. However, flexible rubber hoses have limited pressure-bearing capacity and are prone to damage, thus requiring limiting support. If a limiting structure is installed inside the hose, a dead zone of material retention can easily form between the limiting component and the inner wall of the hose, causing hardening and blockage of the emulsion explosive. Therefore, existing pipeline-type buffer devices often only use external limiting. How to ensure effective hose limiting to improve pressure-bearing capacity and durability while avoiding material retention and blockage caused by internal limiting structures has become a pressing technical challenge. Utility Model Content

[0005] 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 pipeline pressure pulsation buffer device that provides continuous and stable delivery of emulsion explosives, is not prone to blockage, and has a delivery hose that is not easily damaged.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0007] A pipeline-type pressure pulsation buffer device includes a delivery hose assembly with both ends connected to an external fluid delivery pipeline, and an outer sleeve sleeved over the delivery hose. A compressible medium is filled between the delivery hose assembly and the outer sleeve. The delivery hose assembly includes an inner hose and an outer hose arranged coaxially. The compressible medium is disposed between the outer sleeve and the outer hose. 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 has a medium flow channel. The incompressible medium filling the space between the inner and outer hoses ensures their synchronized deformation, forming a unified hose structure. This deformation effectively regulates pressure fluctuations during material transport. A limiting sleeve provides bidirectional limiting protection. When the entire hose expands outward, the inner hose abuts against the inner wall of the limiting sleeve, preventing excessive expansion and achieving external limiting. Conversely, when the entire hose deforms inward and contracts, the outer hose abuts against the outer wall of the limiting sleeve, preventing excessive contraction and achieving internal limiting. This design, placing the limiting structure outside the material flow channel, ensures unobstructed and smooth material flow within the channel, eliminating the risk of stagnation, hardening, and blockage, while significantly enhancing the hose's pressure resistance and durability against deformation and breakage. Furthermore, the inner hose, in direct contact with the material, has a large response area, enabling it to quickly and efficiently absorb pressure fluctuations, ensuring the stability and continuity of material transport.

[0008] Preferably, the aforementioned pipeline-type pressure pulsation buffer device further includes a connector assembly for connecting to an external fluid delivery pipeline. Both ends of the delivery hose assembly and the outer sleeve are fixedly connected 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 simplifying the installation process of the buffer device and ensuring a stable connection between the buffer device and the external pipeline.

[0009] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, the connector assembly includes a connecting pipe body, a connecting limiting boss, and a flange. One end of the connecting pipe body is connected to an external fluid delivery pipeline. The inner flexible hose is sealed and fitted onto the other end of the connecting pipe body. The connecting limiting boss is fixed at the middle position of the connecting pipe body. The limiting sleeve is clamped onto the connecting limiting boss. The end of the outer sleeve is provided with a radially inward-curving limiting ring. 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.

[0010] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, a hose clamp is provided at the connection between the inner hose and the connecting pipe body. The hose clamp provides a strong clamping force, ensuring a tight connection between the inner hose and the connecting pipe body. This prevents the inner hose from loosening or falling off, effectively prevents material leakage at the connection point, ensures the sealing of the material conveying channel, and also effectively prevents leakage of incompressible media between the inner and outer hoses.

[0011] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, a limiting step is provided on one side of the connecting limiting boss, and the limiting sleeve is clamped onto the limiting step. The other side of the connecting limiting boss is sealed and fixedly connected to the flange. The limiting step on one side of the connecting limiting boss can accurately clamp the limiting sleeve, effectively preventing the limiting sleeve from displacing in the axial and radial directions, ensuring its stable support and limiting function. The other side is fixedly connected to the flange, thus realizing a stable connection between the connecting pipe body and the flange.

[0012] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, the outer flexible hose has radially outward-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. The cooperation between the retaining flanges, the retaining ring, and the flange provides reliable axial positioning for the outer flexible hose. Furthermore, the press-fitting of the retaining ring against the outer wall of the outer flexible hose, together with the retaining flanges, creates a double sealing effect, improving the sealing reliability between the outer flexible hose and the flange.

[0013] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, the locking flange has a sealing flange on the side near the flange, and the flange has a sealing groove that matches the sealing flange. This arrangement prevents incompressible media from leaking from the flange connection.

[0014] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, a sealing element is provided on the side of the connecting limiting boss near the flange. This arrangement further prevents incompressible media from leaking from the flange connection.

[0015] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, the medium flow channel is a plurality of 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.

[0016] In the aforementioned pipeline-type pressure pulsation buffer device, preferably, a pressure gauge is installed on the outer sleeve. The pressure gauge allows for real-time monitoring of the medium pressure changes between the outer sleeve and the outer flexible hose, providing operators with intuitive pressure data.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This invention utilizes an incompressible medium filled between the inner and outer hoses to ensure their synchronized deformation, forming a unified hose structure. This deformation effectively regulates pressure fluctuations during material transport. Simultaneously, a limiting sleeve between the inner and outer hoses provides bidirectional limitation on hose deformation, ensuring smooth material flow within the inner hose. This completely avoids the risk of stagnation, hardening, and blockage caused by contact between the limiting structure and the material, significantly enhancing the hose's pressure-bearing capacity and durability, and preventing excessive deformation and breakage. Furthermore, the inner hose, which directly contacts the material, has a larger response area, enabling it to quickly and effectively absorb pressure fluctuations, thus ensuring the continuity and stability of material transport. Attached Figure Description

[0019] 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.

[0020] Figure 1 A schematic cross-sectional view of the pipeline-type pressure pulsation buffer device in an embodiment;

[0021] Figure 2 for Figure 1 Enlarged view of point A;

[0022] Figure 3 A three-dimensional structural schematic diagram of the pipeline-type pressure pulsation buffer device for an embodiment;

[0023] Figure 4 This is a schematic diagram of the limiting sleeve structure in an embodiment.

[0024] Legend

[0025] 1. Delivery hose assembly; 11. Inner hose; 111. Hose clamp; 12. Outer hose; 121. Clamping flange; 122. Sealing flange; 13. Limiting sleeve; 131. Liquid passage hole; 2. Outer sleeve; 21. Limiting retaining ring; 22. Pressure gauge; 23. Compressed medium inlet / outlet; 24. Injection port; 3. Connector assembly; 31. Connecting pipe body; 32. Flange; 33. Connecting limiting boss; 331. Limiting step; 332. Seal. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example:

[0031] like Figures 1 to 4 As shown, the pipeline-type pressure pulsation buffer device of this embodiment includes a delivery hose assembly 1 with both ends connected to an external fluid delivery pipeline, and an outer sleeve 2 sleeved outside the delivery hose. The delivery hose assembly 1 and the outer sleeve 2 are filled with a compressible medium. The delivery hose assembly 1 includes an inner hose 11 and an outer hose 12 arranged coaxially. The compressible medium is disposed between the outer sleeve 2 and the outer hose 12. The inner hose 11 and the outer hose 12 are filled with an incompressible medium. A limiting sleeve 13 is provided between the inner hose 11 and the outer hose 12. The limiting sleeve 13 is provided with a medium flow channel.

[0032] In this embodiment, a connector assembly 3 for connecting an external fluid delivery pipeline is also included. The two ends of the delivery hose assembly 1 and the outer sleeve 2 are respectively fixed to the connector assembly 3, and both ends of the delivery hose assembly 1 and the outer sleeve 2 are sealed on the connector assembly 3.

[0033] In this embodiment, as Figure 1 and Figure 2 As shown, the connector assembly 3 includes a connecting pipe body 31, a connecting limiting boss 33, and a flange 32. One end of the connecting pipe body 31 is connected to an external fluid conveying pipeline. The inner hose 11 is sealed and fitted onto the other end of the connecting pipe body 31. The connecting limiting boss 33 is fixed in the middle of the connecting pipe body 31. The limiting sleeve 13 is clamped onto the connecting limiting boss 33. The end of the outer sleeve 2 is provided with a radially inward limiting ring 21. The outer hose 12 is clamped between the connecting limiting boss 33 and the limiting ring 21. The flange 32, the outer sleeve 2, and the connecting limiting boss 33 are all sealed and fixedly connected.

[0034] In this embodiment, a hose clamp 111 is provided at the connection between the inner hose 11 and the connecting pipe body 31.

[0035] In this embodiment, a limiting step 331 is provided on one side of the connecting limiting boss 33, and the limiting sleeve 13 is clamped on the limiting step 331. The other side of the connecting limiting boss 33 is sealed and fixed to the flange 32.

[0036] In this embodiment, the outer flexible hose 12 has radially outwardly expanding locking flanges 121 at both ends, and the limiting ring 21 is pressed against the outer wall of the outer flexible hose 12. The locking flanges 121 are clamped between the limiting ring 21 and the flange 32.

[0037] In this embodiment, the locking flange 121 is provided with a sealing flange 122 on the side near the flange 32, and the flange 32 is provided with a sealing groove that matches the sealing flange 122.

[0038] In this embodiment, a sealing element 332 is provided on the side of the connecting limiting boss 33 near the flange 32.

[0039] In this embodiment, as Figure 4 As shown, the medium flow channel consists of several liquid passage holes 131 evenly distributed on the limiting sleeve 13.

[0040] In this embodiment, as Figure 3 As shown, a pressure gauge 22 is provided on the outer sleeve 2. The outer sleeve 2 is also provided with a compressible medium inlet / outlet 23, and the flange 32 is provided with a liquid injection port 24 for filling the space between the inner hose 11 and the outer hose 12 with an incompressible medium.

[0041] In this embodiment, the specific operating steps include: firstly, filling the space between the outer sleeve 2 and the outer hose 12 with compressed gas through the compressed medium inlet / outlet 23, with the preset pressure value set at 60%-80% of the expected working delivery pressure. At this time, the outer hose 12 deforms inward under the action of gas pressure. Then, filling the space between the inner hose 11 and the outer hose 12 with incompressible liquid through the injection port 24, continuing to fill until the inner diameter of the inner hose 11 shrinks to about 80% of its free inner diameter, so that the inner hose 11 and the outer hose 12 basically achieve synchronous inward deformation. After completion, the injection port 24 is closed, and then the pipeline pressure pulsation buffer device is installed at the outlet position of the external dual piston pump. The external dual-piston pump is activated, and the conveying pressure is applied to the inner hose 11 and transmitted to the outer hose 12. Under the preset compressed gas pressure, the inner hose 11 and the outer hose 12 expand outward synchronously to achieve an initial pressure balance. When the conveying pressure increases instantaneously, the inner hose 11 and the outer hose 12 continue to expand outward synchronously, eliminating the increased pressure through expansion and deformation, thus maintaining a relatively constant value when the material is output from the inner hose 11, and ensuring stable output material pressure. When the conveying pressure is too high, the inner hose 11 expands to abut against the inner wall of the limiting sleeve 13 to prevent the inner hose 11 and the outer hose 12 from over-expanding and rupturing. When the conveying pressure decreases instantaneously, the inner hose 11 and the outer hose 12 contract inward synchronously, compensating for the reduced pressure through contraction and deformation, thus maintaining a relatively constant value when the material is output from the inner hose 11, and ensuring stable output material pressure. When the delivery pressure is too low, the outer hose 12 retracts inward to abut against the outer wall of the limiting sleeve 13 to prevent the inner hose 11 and the outer hose 12 from excessively contracting and breaking.

[0042] 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 pipeline-type pressure pulsation buffer device, comprising a delivery hose assembly (1) with both ends connected to an external fluid delivery pipeline, and an outer sleeve (2) sleeved over the delivery hose, wherein a compression medium is filled between the delivery hose assembly (1) and the outer sleeve (2), characterized in that, The delivery hose assembly (1) includes an inner hose (11) and an outer hose (12) arranged coaxially. The compression medium is disposed between the outer sleeve (2) and the outer hose (12). The space between the inner hose (11) and the outer hose (12) is filled with an incompressible medium. A limiting sleeve (13) is provided between the inner hose (11) and the outer hose (12). The limiting sleeve (13) is provided with a medium flow channel.

2. The pipeline-type pressure pulsation buffer device according to claim 1, characterized in that, It also includes a connector assembly (3) for connecting an external fluid delivery pipeline. The two ends of the delivery hose assembly (1) and the outer tube (2) are respectively fixed to the connector assembly (3). The two ends of the delivery hose assembly (1) and the outer tube (2) are sealed on the connector assembly (3).

3. The pipeline-type pressure pulsation buffer device according to claim 2, characterized in that, The connector assembly (3) includes a connecting pipe body (31), a connecting limiting boss (33), and a flange (32). One end of the connecting pipe body (31) is connected to an external fluid transport pipeline. The inner hose (11) is sealed and fitted onto the other end of the connecting pipe body (31). The connecting limiting boss (33) is fixed in the middle of the connecting pipe body (31). The limiting sleeve (13) is clamped onto the connecting limiting boss (33). The end of the outer sleeve (2) is provided with a radially inward limiting ring (21). The outer hose (12) is clamped between the connecting limiting boss (33) and the limiting ring (21). The flange (32), the outer sleeve (2), and the connecting limiting boss (33) are all sealed and fixed.

4. The pipeline-type pressure pulsation buffer device according to claim 3, characterized in that, A hose clamp (111) is provided at the connection between the inner hose (11) and the connecting pipe body (31).

5. The pipeline-type pressure pulsation buffer device according to claim 3, characterized in that, The connecting limiting boss (33) has a limiting step (331) on one side, and the limiting sleeve (13) is locked on the limiting step (331). The other side of the connecting limiting boss (33) is sealed and fixed to the flange (32).

6. The pipeline-type pressure pulsation buffer device according to claim 3, characterized in that, The outer hose (12) has radially outwardly expanding locking flanges (121) at both ends. The limiting ring (21) is pressed against the outer wall of the outer hose (12). The locking flange (121) is clamped between the limiting ring (21) and the flange (32).

7. The pipeline-type pressure pulsation buffer device according to claim 6, characterized in that, The locking flange (121) has a sealing flange (122) on the side near the flange (32), and the flange (32) has a sealing groove that matches the sealing flange (122).

8. The pipeline-type pressure pulsation buffer device according to claim 3, characterized in that, The connecting limiting boss (33) is provided with a sealing element (332) on the side near the flange (32).

9. The pipeline-type pressure pulsation buffer device according to any one of claims 1-8, characterized in that, The medium flow channel is a plurality of liquid passage holes (131) evenly distributed on the limiting sleeve (13).

10. The pipeline-type pressure pulsation buffer device according to any one of claims 1-8, characterized in that, A pressure gauge (22) is provided on the outer tube (2).

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