Pulse damper and conveying system

Abstract

The utility model discloses a pulse damper and a conveying system. The pulse damper comprises a shell, a gas pipeline and a limiting device, the bottom of the shell is connected with the liquid pipeline, the first end of the gas pipeline is connected with the gas input device, the second end of the gas pipeline is arranged in the shell, the limiting device is arranged in the shell, and one end of the limiting device is connected with the gas pipeline. The limiting device is in a first preset state so as to open the gas pipeline and the opening of the shell. When the liquid level rises to exceed the preset liquid level due to the fact that the gas is dissolved by the liquid, the gas pipeline and the shell are in a communicating state, and the gas in the gas pipeline enters the shell to enable the liquid level to descend until the liquid level does not exceed the preset liquid level height; the limiting device can automatically open the opening according to the liquid level to enable the gas pipeline to input gas into the shell through the opening or automatically close the opening, and has the advantages of being simple in structure, low in cost and free of maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, and relates to a pulse damper and a conveying system. Background Art

[0002] A pulsation damper is a pressure vessel used to eliminate liquid pressure pulsation or flow pulsation in a pipeline. By utilizing the compressibility of air to store and release liquid, the pressure and flow fluctuations in the pipeline are reduced. However, since the air in the pulse damper will gradually be dissolved by the liquid, the volume of compressible air becomes less and less, resulting in a worse buffering effect of the pulse damper. In the prior art, the pulse damper is usually removed and air is re-introduced to increase the volume of compressible air. However, this will lead to a reduction in the working efficiency of the pulse damper.

[0003] Therefore, how to find a pulse damper that can improve the working efficiency is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a pulse damper and a conveying system.

[0005] The utility model provides a pulse damper, which comprises:

[0006] A housing, the bottom of the housing is connected to a liquid pipeline;

[0007] A gas pipeline, the first end of the gas pipeline is connected to a gas input device, and the second end of the gas pipeline is arranged in the housing;

[0008] A limiting device, arranged in the housing, one end of the limiting device is connected to the gas pipeline;

[0009] Wherein, when the liquid level in the housing is greater than a preset liquid level height, the limiting device is in a first preset state to open the opening between the gas pipeline and the housing; when the liquid level in the housing is less than or equal to the preset liquid level height, the limiting device is in a second preset state to close the opening.

[0010] Wherein, the limiting device comprises:

[0011] A floating member, the overall density of the floating member is less than the density of the liquid in the housing;

[0012] A connecting rod, the first end of the connecting rod is connected to the floating member;

[0013] A sealing plug is arranged on the side wall or the second end of the connecting rod, and the sealing plug extends into the gas pipeline through the opening.

[0014] Wherein, a convex structure is provided on the side wall of the connecting rod, and the convex structure connects the sealing plug and the connecting rod;

[0015] A flange extending radially inwards is provided on the inner wall of the gas pipeline;

[0016] Wherein, the convex structure penetrates through the flange, and the sealing plug is located on the side of the flange away from the opening.

[0017] Wherein, there is a gap between the outer peripheral surface of the convex structure and the inner wall surface of the flange; and / or,

[0018] The flange is provided with a through hole, the through hole penetrates through the flange along the thickness direction of the flange, and at least part of the structure of the sealing plug is aligned with the through hole in the thickness direction of the flange.

[0019] Wherein, the second end of the connecting rod is rotatably connected to the housing, and when the floating member rises or falls, it drives the connecting rod to rotate relative to the gas pipeline; or,

[0020] The second end of the connecting rod is slidably connected to the housing, and the sliding direction is parallel to the axial direction of the opening; or,

[0021] The connecting rod is an elastic member.

[0022] Wherein, in the extending direction of the connecting rod, the distance between the opening and the first end is greater than the distance between the opening and the second end.

[0023] Wherein, the pulse damper further includes:

[0024] A pressure detection device, the pressure detection device is connected to the housing.

[0025] The present utility model provides a conveying system, and the conveying system includes the pulse damper as described above.

[0026] Wherein, the conveying system further includes:

[0027] A liquid tank for containing the liquid to be conveyed;

[0028] A diaphragm pump, the first end of the diaphragm pump is connected to the liquid tank;

[0029] A liquid pipeline, the first end of the liquid pipeline is connected to the bottom of the housing, the second end of the liquid pipeline is connected to the second end of the diaphragm pump, and the third end of the liquid pipeline is connected to a metering device.

[0030] Beneficial effects: The pulse damper includes a housing, a gas pipeline, and a limiting device. The bottom of the housing is connected to a liquid pipeline. The first end of the gas pipeline is connected to a gas input device, and the second end of the gas pipeline is disposed in the housing. The limiting device is disposed in the housing, and one end of the limiting device is connected to the gas pipeline. When the liquid level in the housing is greater than a preset liquid level height, the limiting device is in a first preset state to open the opening between the gas pipeline and the housing. When the liquid dissolves gas and the liquid level rises above the preset liquid level, the gas pipeline and the housing are in a connected state, and the gas in the gas pipeline enters the housing to lower the liquid level until the liquid level does not exceed the preset liquid level height. That is, the limiting device can automatically open the opening according to the liquid level to enable the gas pipeline to input gas into the housing through the opening or automatically close the opening, which has the advantages of simple structure, low cost, and no need for maintenance. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of a pulse damper provided according to an exemplary embodiment of the present invention;

[0033] Figure 2 is Figure 1 a partial enlarged view of area A in

[0034] Figure 3 It is a schematic partial structural diagram of a pulse damper provided according to another exemplary embodiment of the present invention;

[0035] Figure 4 It is a schematic structural diagram of a conveying system provided according to an exemplary embodiment of the present invention.

[0036] The reference signs in the drawings are as follows:

[0037] 10. Housing; 20. Gas pipeline; 21. Flange; 30. Limiting device; 31. Floating member; 32. Connecting rod; 321. Plug; 322. Protruding structure; 323. Rotating rod; 40. Pressure detection device; 100. Pulse damper; 200. Liquid tank; 300. Diaphragm pump; 400. Liquid pipeline. Detailed Embodiments

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0039] Reference to "embodiment" in this text means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0040] Pulse dampers are widely used in pipeline systems and generally include air-type pulse dampers, diaphragm-type pulse dampers, and airbag-type pulse dampers. In the prior art, pulse dampers store and release liquid by utilizing the compressibility of air, thereby reducing the pressure and flow fluctuations in the pipeline. However, since the air in the pulse damper will gradually be dissolved by the liquid, the volume of compressible air becomes less and less, resulting in a worse buffering effect of the pulse damper. To solve this problem, the pulse damper is usually removed and air is re-introduced to increase the volume of compressible air. However, this will result in a reduction in the working efficiency of the pulse damper.

[0041] The following will further describe Figures 1 to 4 the embodiments of the present utility model.

[0042] To solve the above technical problems, as Figure 1 and Figure 2 shown, an exemplary embodiment of the present utility model provides a pulse damper, which includes a housing 10, a gas pipeline 20, and a limiting device 30. The bottom of the housing 10 is connected to a liquid pipeline. The first end of the gas pipeline 20 is connected to a gas input device, and the second end of the gas pipeline 20 extends into the housing 10. The gas input device can deliver gas into the housing through the gas pipeline to provide a downward pressure on the liquid in the housing so as to reduce the liquid level. The limiting device 30 is arranged on the housing 10, and one end of the limiting device 30 is connected to the gas pipeline 20. Wherein, when the liquid level in the housing 10 is greater than a preset liquid level height, the limiting device 30 is in a first preset state to open the opening between the gas pipeline 20 and the housing 10. When the liquid level in the housing 10 is less than or equal to the preset liquid level height, the limiting device 30 is in a second preset state to close the opening.

[0043] In one example, a limiting device can be made of a material with a density less than that of the liquid inside the housing.

[0044] In another example, a limiting device can be made of a corrosion-resistant material (such as carbon steel). Since the density of carbon steel is greater than that of the liquid, the limiting device can be configured as a hollow structure, and the hollow cavity defined by the hollow structure is filled with nitrogen, air, etc.

[0045] In this embodiment, the pulse damper includes a housing, a gas pipeline, and a limiting device. The bottom of the housing is connected to a liquid pipeline. The first end of the gas pipeline is connected to a gas input device, and the second end of the gas pipeline is disposed in the housing. The limiting device is disposed in the housing, and one end of the limiting device is connected to the gas pipeline. When the liquid level in the housing is greater than the preset liquid level height, the limiting device is in a first preset state to open the opening between the gas pipeline and the housing. When the liquid dissolves the gas and the liquid level rises above the preset level, the gas pipeline and the housing are in a communicating state, and the gas in the gas pipeline enters the housing to lower the liquid level until the liquid level does not exceed the preset liquid level height. That is, the limiting device can automatically open the opening according to the liquid level to enable the gas pipeline to input gas into the housing through the opening or automatically close the opening, which has the advantages of simple structure, low cost, and no need for maintenance.

[0046] In one embodiment, as Figure 1 and Figure 2 shown, the limiting device 30 includes a floating member 31 and a connecting rod 32. The overall density of the floating member 31 is less than the density of the liquid inside the housing 10. The first end of the connecting rod 32 is connected to the floating member 31. A plug 321 is provided on the side wall or the second end of the connecting rod 32, and the plug 321 extends into the gas pipeline 20 through the opening.

[0047] In this embodiment, since the density of the floating member is less than the density of the liquid, the floating member can float on the liquid surface. When the liquid level changes, the floating member will also change with the liquid level. By connecting the floating member and the connecting rod, when the gas volume in the housing decreases, the liquid level rises, and the floating member will move in the direction of the rising liquid level, driving the plug away from the opening to open the opening, and the gas from the gas input device enters the housing through the gas pipeline. When the compressible gas volume in the housing increases, the liquid level drops, and the floating member will move in the direction of the dropping liquid level, driving the plug close to the opening until the opening is closed.

[0048] Exemplarily, the floating member 31 can be a sealed hollow body, a floating ball, etc. The shape can be spherical, square, oval, etc. The material can be carbon steel material, such as SUS304 and SUS316 and other materials.

[0049] In one embodiment, as Figure 1 and Figure 2As shown in the figure, a convex structure 322 is provided on the side wall of the connecting rod 32. The convex structure 322 connects the plug 321 and the connecting rod 32. A flange 21 extending radially inward is provided on the inner wall of the gas pipeline 20. Among them, the convex structure 322 penetrates through the flange 21, and the plug 321 is located on the side of the flange 21 away from the opening.

[0050] In this embodiment, since the plug is located in the gas pipeline and the convex structure penetrates through the flange, when the plug closes the opening, the flange can support the plug to improve the reliability of the plug closing the opening.

[0051] It can be understood that in the pulse damper provided in this embodiment, the gas pipeline can provide a pressure towards the flange direction to the plug, so that the plug abuts against the flange, thereby completely closing the opening, without the need for the floating member and the connecting rod to provide a downward acting force. For example, it can effectively avoid the situation that the opening is opened due to the floating member and liquid sloshing when the pulse damper is impacted, and the operation stability is higher.

[0052] In one embodiment, there is a gap between the outer peripheral surface of the convex structure 322 and the inner wall surface of the flange 21.

[0053] In this embodiment, since there is a gap between the outer peripheral surface of the convex structure and the inner wall surface of the flange, when the liquid level starts to rise, the gas can enter the housing through the gap, thereby increasing the gas input rate of the gas pipeline to the housing.

[0054] In one embodiment, the flange 21 is provided with a through hole that penetrates the flange along the thickness direction of the flange 21. In the thickness direction of the flange 21, at least part of the structure of the plug 321 is aligned with the through hole.

[0055] In this embodiment, by aligning at least part of the plug with the through hole, when the plug closes the opening along the direction of the liquid level drop, the gas in the gas pipeline can not only enter the housing through the gap between the convex structure and the flange, but also enter the housing through the through hole, which is beneficial to improving the gas transmission efficiency and facilitating the pulse damper to respond quickly. In some optional embodiments, the gap between the convex structure and the flange can be further reduced, and the gas is only transmitted through the through hole, effectively avoiding gas leakage caused by the inclination of the convex structure and the flange, and improving the operation stability.

[0056] In one embodiment, as Figure 3 shown, the second end of the connecting rod 32 is rotatably connected to the housing 10. When the floating member 31 rises or falls, the connecting rod 32 is driven to rotate relative to the housing 10.

[0057] In this embodiment, the connecting rod is rotatably connected to the housing, and the connecting rod can open and close the opening as the liquid level in the housing rises and falls. Moreover, the floating member can move along the rise and fall of the liquid level within a certain range, avoiding damage to the housing by the floating member and damage to the gas pipeline by the sealing plug due to an overly large movement range of the floating member, thereby improving the reliability of the pulse damper.

[0058] Exemplarily, the connecting rod 32 is provided with a strip-shaped hole, and the convex structure 322 is connected to the connecting rod 32 through the strip-shaped hole. The second end of the connecting rod 32 is rotatably connected to the housing 10 through a rotating rod 323.

[0059] In one embodiment, the second end of the connecting rod 32 is slidably connected to the housing 10, and the sliding direction is parallel to the axial direction of the opening.

[0060] In this embodiment, by slidably connecting the connecting rod to the housing, the connecting rod can open and close the opening as the liquid level in the housing rises and falls, thereby improving the reliability of the pulse damper.

[0061] Exemplarily, the second end of the connecting rod 32 is slidably connected to the gas pipeline 20.

[0062] In one embodiment, the connecting rod 32 is an elastic member.

[0063] In this embodiment, by the connecting rod being an elastic member, the connecting rod can open and close the opening as the liquid level in the housing rises and falls, thereby improving the reliability of the pulse damper.

[0064] Exemplarily, the pulse damper may include a connecting component, and the connecting rod 32 is connected to the gas pipeline 20 through the connecting component.

[0065] In one embodiment, as Figure 1 and Figure 2 shown, in the extending direction of the connecting rod 32, the distance between the opening and the first end is greater than the distance between the opening and the second end.

[0066] In this embodiment, by the distance between the opening and the first end being greater than the distance between the opening and the second end, the reliability of the sealing plug for opening and closing the opening can be improved.

[0067] In one embodiment, as Figure 1 shown, the pulse damper further includes a pressure detection device 40, and the pressure detection device 40 is connected to the housing 10.

[0068] In this embodiment, when the pressure in the housing is within a preset range, the working effect of the pulse damper is good. By providing the pressure detection device, the pressure in the housing can be displayed in real time, thereby improving the reliability of the pulse damper.

[0069] In one embodiment, a gas input device is configured to deliver compressed gas into a gas pipeline 20.

[0070] In this embodiment, since the compressed gas can increase the gas volume inside the housing, delivering compressed gas into the gas pipeline through the gas input device improves the reliability of the pulse damper.

[0071] Exemplarily, the compressed gas can be air, nitrogen, argon, or other inert gases, and the pressure range can be from 0 MP to 1 MP.

[0072] An exemplary embodiment of the present disclosure provides a pulse damper, as Figure 1 and Figure 2 shown, the pulse damper includes a housing 10, a gas pipeline 20, a floating member 31, a connecting rod 32, and a pressure detection device 40. The bottom of the housing 10 is connected to a liquid pipeline. The first end of the gas pipeline 20 is connected to a gas input device, and the second end of the gas pipeline 20 is disposed inside the housing 10. The first end of the connecting rod 32 is connected to the floating member 31. A protruding structure 322 is provided on the side wall of the connecting rod 32. The protruding structure 322 connects the plug 321 and the connecting rod 32. A flange extending radially inward is provided on the inner wall of the gas pipeline 20. The protruding structure 322 penetrates through the flange, and the plug 321 is located on the side of the flange away from the opening. There is a gap between the outer peripheral surface of the protruding structure 322 and the inner wall surface of the flange. The second end of the connecting rod 32 is rotatably connected to the housing 10. Among them, in the extending direction of the connecting rod 32, the distance between the opening and the first end is greater than the distance between the opening and the second end, and the density of the floating member 31 is less than the density of the liquid inside the housing 10.

[0073] The working principle of this pulse damper is described as follows:

[0074] In the initial state, the plug 321 closes the opening. As the liquid continuously dissolves the gas inside the housing 10, the pressure inside the housing 10 increases, causing the liquid level inside the housing 10 to gradually rise. When it rises to a preset liquid level, the plug 321 will automatically open the opening, and the gas from the gas input device enters the housing 10 through the gas pipeline 20, pushing the liquid level inside the housing 10 to gradually drop. When it drops to the preset liquid level, the plug 321 automatically closes the opening to maintain the stability of the gas volume inside the housing 10. And the above steps are repeated cyclically.

[0075] It can be understood that, compared with diaphragm-type pulse dampers and airbag-type pulse dampers, the present application has the advantages of simple structure, low cost, maintenance-free, and stable operation.

[0076] An exemplary embodiment of the present utility model provides a conveying system, and the conveying system includes the pulse damper 100 as described above.

[0077] In one embodiment, asFigure 4 As shown, the conveying system further includes a liquid tank 200, a diaphragm pump 300, and a liquid pipeline 400. The liquid tank 200 is used to hold the liquid to be conveyed. The first end of the diaphragm pump 300 is connected to the liquid tank 200. The first end of the liquid pipeline 400 is connected to the bottom of the housing 10, the second end of the liquid pipeline 400 is connected to the second end of the diaphragm pump 300, and the third end of the liquid pipeline 400 is connected to the metering device.

[0078] In this embodiment, the liquid in the lye tank is pumped out by the diaphragm pump and conveyed to the liquid pipeline. The liquid can enter the pulse damper through the bottom of the housing, and the pulse damper enables the liquid to flow to the metering device at a stable flow rate, thereby improving the reliability of the conveying system.

[0079] Exemplarily, a back pressure valve is provided at the third end of the liquid pipeline 400.

[0080] Describe the working principle of this conveying system:

[0081] During the working process of the diaphragm pump 300, the liquid flow rate in the liquid pipeline 400 increases, and the pressure in the liquid pipeline 400 rises, thereby pushing the liquid to enter from the bottom of the pulse damper 100. The liquid level in the pulse damper 100 rises slightly and compresses the gas at the top of the pulse damper 100, so that the liquid flow rate passing through the back pressure valve is in a stable state. The opening of the housing is in a closed state, and the gas in the gas pipeline 20 cannot enter the pulse damper 100. When the liquid flow rate in the liquid pipeline 400 decreases, the pressure in the liquid pipeline 400 decreases, and the gas at the top of the pulse damper 100 expands, pushing the liquid to flow out from the bottom of the pulse damper 100. The liquid level in the pulse damper 100 drops slightly, and the opening is still in a closed state. As the liquid continuously dissolves the gas at the top of the pulse damper 100, the liquid level in the pulse damper 100 gradually rises. When it rises to the preset liquid level, the sealing plug 321 will automatically open the opening, and the gas of the gas input device enters the housing 10 through the gas pipeline 20, pushing the liquid level in the housing 10 to gradually drop. When it drops to the preset liquid level, the sealing plug 321 automatically closes the opening to maintain the stable gas volume in the housing 10.

[0082] Embodiment 1:

[0083] In this embodiment, the flow rate of the metering device is 20 - 250 L / h, the volume of the pulsation damper 100 is 3 L, the pressure at the third end of the liquid pipeline 400 (the liquid pipeline provided with a back-pressure valve) is maintained near 0.25 Mpa, the floating member 31 is a SUS304 spherical vacuum sphere, and compressed air is used as the gas in the pulsation damper 100. When the diaphragm pump 300 operates, it pumps out the lye in the lye tank and transports it into the liquid pipeline 400. When the pressure in the liquid pipeline 400 reaches 0.28 MPa, the lye enters the pulsation damper 100 from the bottom of the pulsation damper 100, and the liquid level in the pulsation damper 100 rises slightly. At this time, the floating member 31 is at the lowest point, causing the plug 321 to close the opening, and the air at the top of the pulsation damper 100 is compressed. As the diaphragm pump 300 reciprocates, the pressure in the liquid pipeline 400 slowly decreases to 0.23 MPa, the air at the top of the pulsation damper 100 expands, pushing the liquid in the pulsation damper 100 to flow out from the bottom, and the liquid level drops slightly while the position of the floating member 31 remains unchanged, and the opening is still in the closed state. Finally, during the entire reciprocating movement of the diaphragm pump 300, the liquid pipeline 400 where the back-pressure valve is located stably outputs 200 L / h of lye. As the lye continuously dissolves the air at the top of the pulsation damper 100, the liquid level in the pulsation damper 100 gradually rises, pushing the floating member 31 upward, the plug opens the opening, compressed air enters the pulsation damper 100, pushing the liquid level in the pulsation damper 100 to drop. Subsequently, after the floating member 31 drops to the lowest point, the plug closes the opening, maintaining the stable volume of the gas in the pulsation damper 100, which can ensure that the pulsation damper 100 operates continuously and stably for more than 1 year.

[0084] Embodiment 2:

[0085] In this embodiment, the flow rate of the metering device is 10 - 100 L / h, the volume of the pulsation damper 100 is 1.5 L, the pressure at the third end of the liquid pipeline 400 (the liquid pipeline provided with a back pressure valve) is maintained near 0.5 MPa, the floating member 31 is an SUS304 elliptical vacuum sphere, the major axis of the ellipse is perpendicularly installed to the connecting rod 32, and compressed air is used as the gas in the pulsation damper 100. When the diaphragm pump 300 operates, it pumps out the lye in the lye tank and transports it into the liquid pipeline 400. When the pressure in the liquid pipeline 400 reaches 0.52 MPa, the lye enters the pulsation damper 100 from the bottom of the pulsation damper 100, and the liquid level in the pulsation damper 100 slightly rises. At this time, the floating member 31 is at the lowest point, causing the plug 321 to close the opening, and the air in the pulsation damper 100 is compressed. With the reciprocating motion of the diaphragm pump 300, the pressure in the liquid pipeline 400 slowly decreases to 0.47 MPa, the air at the top of the pulsation damper 100 expands, pushing the liquid in the pulsation damper 100 to flow out from the bottom, and the liquid level slightly drops while the position of the floating member 31 remains unchanged, and the opening is still in the closed state. Finally, during the entire reciprocating motion of the diaphragm pump 300, the liquid pipeline 400 where the back pressure valve is located stably outputs 50 L / h of lye. As the lye continuously dissolves the air at the top of the pulsation damper 100, the liquid level in the pulsation damper 100 gradually rises, pushing the floating member 31 to rise, the plug opens the opening, compressed air enters the pulsation damper 100, pushing the liquid level in the pulsation damper 100 to drop. Then, after the floating member 31 drops to the lowest point, the plug closes the opening, maintaining the stable volume of the gas in the pulsation damper 100, and ensuring that the pulsation damper 100 can operate continuously and stably for more than 1 year.

[0086] The content described in the embodiments of this specification is only a list of the implementation forms of the utility model concept. The protection scope of the utility model should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the utility model also includes equivalent technical means that those skilled in the art can think of based on the utility model concept.

Claims

1. A pulse damper, characterized in that, The pulse dampener comprises: A shell, the bottom of which is connected to a liquid pipeline; A gas pipeline, wherein a first end of the gas pipeline is connected to a gas input device, and a second end of the gas pipeline is disposed on the housing; A limiting device is arranged on the housing, and one end of the limiting device is connected to the gas pipeline; When the liquid level in the shell is greater than a preset liquid level height, the limit device is in a first preset state to open the opening between the gas pipeline and the shell; when the liquid level in the shell is less than or equal to the preset liquid level height, the limit device is in a second preset state to close the opening.

2. The pulse damper according to claim 1, characterized in that, The limiting device comprises: A floating member, wherein the overall density of the floating member is less than the density of the liquid in the shell; A connecting rod, a first end of which is connected to the floating member; A sealing plug is provided on the side wall or the second end of the connecting rod, and the sealing plug extends into the gas pipeline through the opening.

3. The pulse damper according to claim 2, characterized in that: The side wall of the connecting rod is provided with a protruding structure, and the protruding structure connects the sealing plug and the connecting rod; The inner wall of the gas pipeline is provided with a flange extending radially inward; The protruding structure penetrates the flange, and the sealing plug is located on a side of the flange away from the opening.

4. The pulse damper according to claim 3, characterized in that There is a gap between the outer peripheral surface of the protruding structure and the inner wall surface of the flange; and / or, The flange is provided with a through hole, and the through hole penetrates the flange along the thickness direction of the flange. In the thickness direction of the flange, at least a partial structure of the sealing plug is opposite to the through hole.

5. The pulse damper according to any one of claims 2 to 4, characterized in that: The second end of the connecting rod is rotatably connected to the shell, and the floating member is raised or lowered, driving the connecting rod to rotate relative to the shell; or, The second end of the connecting rod is slidably connected to the housing, and the sliding direction is parallel to the axial direction of the opening; or, The connecting rod is an elastic member.

6. The pulse damper according to claim 5, characterized in that In an extending direction of the connecting rod, a distance between the opening and the first end is greater than a distance between the opening and the second end.

7. The pulse damper according to any one of claims 1 to 4, characterized in that, The pulse dampener further comprises: A pressure detection device is connected to the shell.

8. The impulse damper according to any one of claims 1 to 4, characterized in that, The gas input device is used to transport compressed gas into the gas pipeline.

9. A conveying system, characterized in that, The delivery system comprises a pulsation dampener as claimed in any one of claims 1 to 8.

10. The conveying system according to claim 9, characterized in that, The delivery system further comprises: A liquid tank, the liquid tank being used to contain the liquid to be transported; a diaphragm pump, a first end of which is connected to the liquid tank; A liquid pipeline, wherein a first end of the liquid pipeline is connected to the bottom of the shell, a second end of the liquid pipeline is connected to the second end of the diaphragm pump, and a third end of the liquid pipeline is connected to a metering device.

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