Pipeline type pulse damper

Abstract

The utility model relates to the technical field of pulse dampers, in particular to a pulse damper for reducing pressure and controlling flow in a metering pump pipeline system. A pipeline type pulse damper comprises a pipe body and flange plates at the two ends of the pipe body, an elastic pipe is arranged in the pipe body, the two ends of the elastic pipe are fixed to the two flange plates at the two ends of the pipe body respectively, an inner cavity for fluid to flow is formed in the elastic pipe, and an outer cavity is formed by the outer side of the elastic pipe and the inner wall of the pipe body. An inner cavity formed by the elastic pipe is a pipeline for fluid to pass through, an outer cavity formed by the outer side of the elastic pipe and the inner wall of the pipe body is filled with inert gas, the fluid only flows in the inner cavity, and the elastic pipe plays a role in gas-liquid isolation. The flow of fluid flowing into the inner cavity is controlled by controlling the air pressure in the outer cavity, elastic buffering and pressure reduction can be conducted due to the fact that the elastic pipe has elasticity, and after the pipeline type pulse damper is installed in a metering pump pipeline system, the functions of pressure reduction and flow control are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse dampers, in particular to a pulse damper used for reducing pressure and controlling flow in a metering pump pipeline system. Background Art

[0002] A pulse dampener, also called a pulse eliminator or pulsation dampener, is a device used to reduce pressure fluctuations and control fluid flow in a liquid or gas flow system.

[0003] Pulse dampers are widely used as ancillary equipment in pipeline hydraulic systems in petrochemical, environmental protection, chemical, sewage treatment and other industries. They are usually used to reduce the unevenness of the discharge flow of reciprocating pumps (such as reciprocating pumps and metering pumps) and reduce the hydraulic impact of the pipeline system (such as water hammer effect).

[0004] The existing pulse dampers used in metering pumps mainly include air tank pulse dampers, air bag pulse dampers, and diaphragm pulse dampers.

[0005] During the use of the air tank pulse damper, the gas will be lost along with the medium. During the long production process, the reduction of gas will cause the pressure in the damper to decrease. In order to ensure the purpose of pressure reduction and flow control of the damper, the air tank needs to be replaced frequently.

[0006] During the use of airbag and diaphragm pulse dampers, the airbag will deform randomly and the deformation amount is uncontrolled. The airbag or diaphragm is subjected to a large shear force. During a long production process, the airbag or diaphragm will be damaged and need to be replaced frequently.

[0007] Therefore, to reduce maintenance needs and lower costs, we designed a pipeline pulsation dampener. Utility Model Content

[0008] The utility model aims to provide a pipeline pulsation damper for reducing pressure and controlling flow in a metering pump pipeline system. The pipeline pulsation damper is installed in the metering pump pipeline system, thereby effectively reducing maintenance requirements and industrial costs.

[0009] To solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A pipeline pulse damper comprises a tube body and flanges at both ends of the tube body, wherein an elastic tube is arranged in the tube body, and the two ends of the elastic tube are respectively fixed on two flanges at both ends of the tube body, the interior of the elastic tube is an inner chamber for fluid flow, and the outer side of the elastic tube and the inner wall of the tube body constitute an outer chamber.

[0011] The beneficial effects of adopting the present invention are:

[0012] The inner chamber formed by the elastic tube is a pipeline through which the fluid passes. The outer side of the elastic tube and the inner wall of the tube form an outer chamber filled with inert gas. The fluid only flows in the inner chamber, and the elastic tube plays a role in gas-liquid isolation. The flow of the fluid flowing into the inner chamber is controlled by controlling the air pressure in the outer chamber, and because the elastic tube itself has elasticity, it can perform elastic buffering and pressure reduction. When this pipeline pulse damper is installed in the metering pump pipeline system, it plays a role in pressure reduction and flow control.

[0013] Furthermore, inner limiting rings are provided on the outer sides of both ends of the elastic tube, the inner limiting rings are located in the flange, the inner holes of the inner limiting rings are connected to the elastic tube, and the outer walls of the inner limiting rings are connected to the inner walls of the tube body. The inner limiting rings play a role in reinforcing the elastic tube to the flange.

[0014] Furthermore, an outer limiting plate is provided between the two inner limiting rings, and the two ends of the outer limiting plate are respectively fixed on the two inner limiting rings, and the outer limiting plate is located outside the elastic tube, and there is a gap between the outer limiting plate and the elastic tube. The outer limiting plate controls the elastic deformation degree of the elastic tube.

[0015] Furthermore, an air nozzle is provided on the outer wall of the tube body, and the air nozzle passes through the tube body and communicates with the outer chamber, so that the air pressure of the gas in the outer chamber can be changed at any time according to demand.

[0016] Furthermore, the flange is provided with a pressure gauge, and the pressure gauge has a pressure measuring portion, and the pressure measuring portion passes through the flange to measure the pressure of the inner chamber of the elastic tube, so that the pressure in the pipeline pulse damper can be monitored in real time.

[0017] Furthermore, the tube body is provided with a pressure gauge, and the pressure gauge has a pressure measuring portion, and the pressure measuring portion passes through the tube body and the outer chamber to measure the pressure of the inner chamber of the elastic tube, so as to monitor the pressure in the pipeline pulse damper in real time.

[0018] Furthermore, an inlet pipe is provided on one side of the flange, the inlet pipe is connected to the elastic pipe, a short outlet pipe connected to the inlet pipe is provided on the side wall of the inlet pipe, and a one-way valve is provided at the inlet pipe opening to control the flow direction of the fluid.

[0019] Furthermore, the sides of the flanges at both ends of the tube body that are away from each other are respectively provided with an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are respectively connected to the two ends of the elastic tube.

[0020] The advantages of the utility model are: 1. The pipeline pulse damper utilizes an inner limit ring and an outer limit plate to control the deformation degree of the elastic tube within its elastic range, so the elastic tube is almost not subject to shear stress, its durability is significantly improved, the service life is extended, and the maintenance requirements are greatly reduced; 2. The parts of the pipeline pulse damper are made of common materials, the cost is low, the production process is simple, and the production cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a pipeline pulse damper according to Example 1 of the utility model.

[0022] Figure 2 This is a schematic structural diagram of a pipeline pulse damper according to Example 2 of the utility model. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The reference numerals in the drawings of the specification include: pressure gauge 1, inner limit ring 2, elastic tube 3, outer limit plate 4, air nozzle 5, flange 6, tube body 7, inner chamber 8, outer chamber 9, inlet pipe 10, outlet pipe 11.

[0025] Example 1, see Figure 1 As shown, a pipeline pulse damper device in this embodiment 1 is installed vertically, including a pipe body, flanges connected at both ends of the pipe body, an inner limit ring 2, an outer limit plate 4, an air nozzle 5, and a pressure gauge 1.

[0026] An elastic tube 3 is provided in the tube body, and both ends of the elastic tube 3 are respectively fixed on two flanges 6 at both ends of the tube body 7. The inside of the elastic tube 3 is an inner chamber 8 for fluid flow, and the outer side of the elastic tube 3 and the outer wall of the tube body 7 form inner and outer chambers 9.

[0027] An inner stop ring 2 is provided on the outer side of both ends of the elastic tube 3. The inner stop ring 2 is inside the flange. The inner hole of the inner stop ring 2 is connected to the elastic tube 3. The outer wall of the inner stop ring 2 is connected to the inner wall of the tube body. An outer stop plate 4 is provided between the two inner stop rings 2. The two ends of the outer stop plate 4 are respectively fixed on the two inner stop rings 2. The outer stop plate 4 is located outside the elastic tube 3. There is a gap between the outer stop plate 4 and the elastic tube 3.

[0028] The inner and outer chambers 9 formed by the elastic tube 3 and the inner wall of the tube body 7 are pre-filled with inert gas. The outer wall of the tube body 7 is provided with a gas nozzle 5, which passes through the tube body 7 to communicate with the outer chamber. The gas nozzle 5 provided on the outer wall of the tube body 7 is used to control the air pressure in the inner and outer chambers 9 and thus control the volume of the fluid flowing into the inner chamber 8. The flange 6 located on the opposite side of the inlet pipe is provided with a pressure gauge 1, and the pressure gauge 1 has a pressure measuring part, which passes through the flange 6 to measure the pressure of the inner chamber 8 of the elastic tube 3, and is used to monitor the pressure of the pipeline pulse damper.

[0029] An inlet pipe 10 is provided on one side of the flange, and the inlet pipe 10 is connected to the elastic tube 3. An outlet pipe 11 connected to the inlet pipe 10 is provided on the side wall of the inlet pipe 10. A one-way valve is provided at the inlet pipe 10 to control the flow direction of the fluid.

[0030] During installation, the fluid enters the inner chamber 8 formed by the elastic tube 3 through the inlet pipe 10. The elastic tube 3 undergoes elastic deformation to reduce pressure fluctuations in the liquid or air flow system and to control the fluid. When the fluid pressure is too high and the elastic tube 3 is about to be over-sheared, the outer limit plate 4 bears the force of the excessive fluid pressure to prevent the elastic tube 3 from excessively deforming and generating shear force.

[0031] The one-way valve provided at the inlet pipe 10 of this embodiment is used to prevent the fluid from flowing out of the inlet pipe 10 when it flows back. When in use, the fluid flows into the inner chamber 8 through the inlet pipe 10, and then flows back through the inner chamber 8. The backflowing fluid in the inner chamber 8 flows out from the outlet pipe 11 connected to the inlet pipe 10.

[0032] Example 2, see Figure 2 As shown, a pipeline pulse damper device in this embodiment 2 is installed horizontally, including a tube body 7, flanges 6 connected at both ends of the tube body 7, an inner limit ring 2, an outer limit plate 4, an air nozzle 5, and a pressure gauge 1.

[0033] An elastic tube 3 is arranged inside the tube body 7, and both ends of the elastic tube 3 are respectively fixed to two flanges 6 at both ends of the tube body 7. The inside of the elastic tube 3 is an inner chamber 8 for fluid flow, and the outer side of the elastic tube 3 and the outer wall of the tube body 7 form an outer chamber.

[0034] An inner stop ring 2 is provided on the outer side of both ends of the elastic tube 3. The inner stop ring 2 is inside the flange 6. The inner hole of the inner stop ring 2 is connected to the elastic tube 3. The outer wall of the inner stop ring 2 is connected to the inner wall of the tube body 7. An outer stop plate 4 is provided between the two inner stop rings 2. The two ends of the outer stop plate 4 are respectively fixed on the two inner stop rings 2. The outer stop plate 4 is located outside the elastic tube 3. There is a gap between the outer stop plate 4 and the elastic tube 3.

[0035] The inner and outer chambers 9 formed by the elastic tube 3 and the inner wall of the tube body 7 are pre-filled with inert gas. The outer wall of the tube body 7 is provided with a gas nozzle 5, which passes through the tube body to connect the inner and outer chambers 9. The gas nozzle 5 provided on the outer wall of the tube body 7 is used to control the air pressure in the inner and outer chambers 9 and thus control the volume of the fluid flowing into the inner chamber 8. The tube body 7 is provided with a pressure gauge 1, and the pressure gauge 1 has a pressure measuring part, which passes through the tube body 7 and the inner and outer chambers 9 to measure the pressure of the elastic tube inner chamber 8, and is used to monitor the pressure of the pipeline pulse damper.

[0036] The tube body 7 of this embodiment is arranged transversely, and the flanges 6 at both ends of the tube body 7 are provided with an inlet pipe 10 and an outlet pipe 11 on opposite sides thereof, respectively. The inlet pipe 10 and the outlet pipe 11 are connected to both ends of the elastic tube 3 respectively.

[0037] In this embodiment, the fluid flows into the inner chamber 8 of the elastic tube 3 from the inlet pipe 10, and the fluid flows out through the outlet pipe 11 through the inner chamber 8 of the elastic tube 3. The fluid enters the inner chamber 8 formed by the elastic tube 3 through the inlet pipe 10. The elastic deformation of the elastic tube 3 is used to reduce the pressure fluctuation in the liquid flow or air flow system and control the fluid. When the fluid pressure is too high and the elastic tube 3 is about to be over-sheared, the outer limit plate 4 bears the force of the excessive fluid pressure to prevent the elastic tube 3 from excessively deforming and generating shear force.

[0038] The above are only embodiments of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A pipeline type pulse damper, comprising a pipe body and flanges at both ends of the pipe body, characterized in that: An elastic tube is arranged in the tube body, and two ends of the elastic tube are respectively fixed on two flanges at two ends of the tube body. The interior of the elastic tube is an inner chamber for fluid flow, and the outer side of the elastic tube and the inner wall of the tube body form an outer chamber.

2. The pipeline type pulse damper according to claim 1, characterized in that: The outer sides of both ends of the elastic tube are provided with inner limiting rings, the inner limiting rings are located in the flange, the inner holes of the inner limiting rings are connected to the elastic tube, and the outer walls of the inner limiting rings are connected to the inner walls of the tube body.

3. The pipeline type pulse damper according to claim 2, characterized in that: An outer limiting plate is arranged between the two inner limiting rings, and two ends of the outer limiting plate are respectively fixed on the two inner limiting rings. The outer limiting plate is located outside the elastic tube, and there is a gap between the outer limiting plate and the elastic tube.

4. The pipeline type pulse damper according to claim 1, characterized in that: An air nozzle is arranged on the outer wall of the tube body, and the air nozzle passes through the tube body and communicates with the outer chamber.

5. The pipeline type pulse damper according to claim 1, characterized in that: The flange is provided with a pressure gauge, and the pressure gauge has a pressure measuring portion, and the pressure measuring portion passes through the flange to measure the pressure of the inner chamber of the elastic tube.

6. The pipeline type pulse damper according to claim 1, characterized in that: The tube body is provided with a pressure gauge, and the pressure gauge has a pressure measuring portion, and the pressure measuring portion passes through the tube body and the outer chamber to measure the pressure of the inner chamber of the elastic tube.

7. The pipeline type pulse damper according to claim 1, characterized in that: An inlet pipe is provided on one side of the flange, the inlet pipe is connected to the elastic pipe, a short outlet pipe connected to the inlet pipe is provided on the side wall of the inlet pipe, and a one-way valve is provided at the inlet pipe opening to control the flow direction of the fluid.

8. The pipeline type pulse damper according to claim 1, characterized in that: An inlet pipe and an outlet pipe are respectively arranged on the side surfaces of the flanges at both ends of the pipe body which are away from each other. The inlet pipe and the outlet pipe are respectively communicated with the two ends of the elastic pipe.

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