CN107143674B

CN107143674B - Pressure balancing device and pressure balancing system

Info

Publication number: CN107143674B
Application number: CN201710560019.5A
Authority: CN
Inventors: 张少博; 白云岗; 曹彪; 卢震林; 彭致功; 王永杰
Original assignee: Xinjiang Institute of Water Resources and Hydropower Research
Current assignee: Xinjiang Institute of Water Resources and Hydropower Research
Priority date: 2017-07-11
Filing date: 2017-07-11
Publication date: 2023-03-17
Anticipated expiration: 2037-07-11
Also published as: CN107143674A

Abstract

The invention discloses a pressure balancing device and a pressure balancing system, relates to the field of pipelines, and achieves the purposes of reducing the influence of negative pressure on the pipeline, thereby reducing the thickness of a pipe wall, saving materials and reducing the cost. The main technical scheme of the invention is as follows: a pressure equalizing device, comprising: the balance piece is arranged in the cavity and provided with a channel which is used for communicating the inflow port with the outflow port; the side wall of the pipe body is provided with a notch; when the pressure in the passage is reduced, the balance member is pressed toward the passage, and air enters the passage from the notch. The invention is mainly used for preventing the pipeline from being damaged by the negative pressure phenomenon.

Description

Pressure balancing device and pressure balancing system

Technical Field

The invention relates to the field of pipelines, in particular to a pressure balancing device and a pressure balancing system.

Background

A pipe is a device for transporting a gas, a liquid or a fluid with solid particles. The pipelines have a wide range of applications, mainly in water supply, drainage, heat supply, gas supply, long-distance petroleum and natural gas transportation, agricultural irrigation, hydraulic engineering and various industrial devices. The pipe may be subjected to a variety of external forces including its own weight, thrust of the fluid against the end of the pipe, wind and snow loads, soil pressure, thermal stresses due to thermal expansion and contraction, vibration loads, earthquake disasters, etc. In order to ensure the strength and rigidity of the pipeline, various supports (hangers) must be arranged, and the material and wall thickness of the pipeline are more importantly selected. When the device at the upstream of the pipeline suddenly reduces the flow, closes or suddenly increases the flow at the downstream of the pipeline, the pressure in the pipeline at the outlet side of the upstream device is suddenly reduced, so that negative pressure is generated in the pipeline, and the pipeline is broken due to atmospheric extrusion. In the prior art, the pipeline damage mode that prevents that pipeline negative pressure from leading to generally is increase pipeline intensity, and increase pipeline intensity usually reaches the effect that increases the bearing capacity through increasing pipeline wall thickness, and this makes the pipeline material waste comparatively serious.

Disclosure of Invention

In view of this, embodiments of the present invention provide a pressure balance device and a pressure balance system, which mainly aim to reduce the influence of negative pressure on a pipeline, thereby reducing the thickness of the pipeline wall, saving material and reducing cost.

In order to achieve the purpose, the invention mainly provides the following technical scheme:

in one aspect, an embodiment of the present invention provides a pressure balancing apparatus, including:

the balance piece is arranged in the cavity and provided with a channel which is used for communicating the inflow port with the outflow port; the side wall of the pipe body is provided with a notch; when the pressure in the channel is reduced, the balance piece is pressed towards the channel, air enters the channel from the notch, the air pressure in the channel is supplemented, and the balance piece recovers and blocks the connection between the notch and the channel.

Further, the notch is provided at the first end side.

Further, the cross section of the pipe body is gradually enlarged from the first end to the second end.

Further, the baffle plate is connected to the outflow opening and extends towards the first end, and the baffle plate is used for preventing the balance member from being extruded towards the channel.

Furthermore, the notches are uniformly distributed on the side wall of the tube body.

Further, the balance piece is made of rubber materials.

Further, the balance piece is made of a silica gel material.

Further, the balance member is an air bag.

On the other hand, an embodiment of the present invention further provides a pressure balancing system, which is characterized by including: a duct, a pressure equalizing device as described above and a superior device, the superior device being connected to the inflow port and the outflow port being connected to the duct.

Furthermore, the pipeline and the pressure balancing device are detachably connected; the pressure balancing device is detachably connected with the superior equipment.

The pressure balancing device provided by the embodiment of the invention comprises: the balance piece is arranged in the cavity and provided with a channel which is used for communicating the inflow port with the outflow port; the side wall of the tube body is provided with a notch; when the pressure in the passage is reduced, the balance member is pressed toward the passage, and air enters the passage from the notch. In the prior art, the pipeline damage mode that prevents that pipeline negative pressure from leading to generally is increase pipeline intensity, and increase pipeline intensity usually reaches the effect that increases the bearing capacity through increasing pipeline wall thickness, and this makes the pipeline material waste comparatively serious. When the pressure in the channel is reduced, the external air enters the pipe body from the notch to extrude the balance piece, so that the channel is communicated with the notch, the air is filled into the channel to supplement the pressure in the channel, the pressure in the channel is increased, and the pipe body is protected. Make the manufacturing of body like this only need satisfy the intensity requirement of normal during operation, the wall thickness of pipe is less like this, and required material is less, can practice thrift the cost, can increase of service life simultaneously, effectively reduces time and the expense of shutting down the maintenance.

Drawings

Fig. 1 is a schematic structural diagram of a pressure balancing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another pressure balancing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a pressure balance system according to an embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the pressure balancing device according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 and 2, a pressure balancing apparatus includes:

a pipe body 1 having a first end 12 and a second end 13 opposite to each other, the first end 12 having an inlet port 14, the second end 13 having an outlet port 15, the pipe body 1 having a cavity 11 therein, the cavity 11 having an inner diameter larger than diameters of the inlet port 14 and the outlet port 15, the cavity 11 having a balancer 2 therein, the balancer 2 having a passage 21, the passage 21 communicating the inlet port 14 and the outlet port 15; the side wall of the pipe body 1 is provided with a notch 16; when the pressure in the passage 21 is reduced, the balance member 2 is pressed toward the passage 21, and air enters the passage 21 from the notch 16. Since the fluid is required to flow through the passage 21 during normal operation, the sealing performance between the balance member 2 and the pipe body 1 is required to be high, and the passage 21 has the same diameter as the inflow port 14 and the outflow port 15 in order to ensure pressure balance, thereby ensuring the same pressure when the fluid enters the passage 21 and exits from the passage 2. However, since the balancing member 2 is compressible, in order to prevent the balancing member 2 from flowing out of the outflow port 15 after being pressed, the cross section of the notch 16 near the first end 12 is made larger than the cross section of the reference near the second end 13, so that the balancing member 2 is greatly deformed by being greatly stressed near the first end 12, and the notch 16 and the channel 21 are communicated, and the balancing member 2 is slightly deformed by being less stressed near the second end 13, so that the balancing member 2 is locked at the second end 13 and cannot flow out of the outflow port 15. In order to reduce the resistance to fluid flow, a lubricating coating may be applied within the channel 21. Although the passage 21 is smooth, it is resistant to pressure, and the use of the lubricating coating can reduce the surface friction factor of the balance member 2, thereby reducing the resistance of the fluid in the passage 21, and can also improve the lubricity and wear resistance of the surface of the balance member 2, thereby extending the service life of the balance member 2. Meanwhile, the coating is convenient to use, and the balance piece 2 does not need to be frequently replaced by paying attention to the supplement of the lubricating coating.

The following specifically describes the pressure balance device in this embodiment by the working process and principle of the pressure balance device in this embodiment:

during normal operation, fluid enters the channel 21 from the inlet 14 and flows out from the outlet 15; when the fluid pressure in the channel 21 is reduced, the balance member 2 is pressed toward the channel 21, so that the notch 16 is opened, air enters the tube body 1 from the notch 16, when the balance member 2 is deformed to a certain extent, the channel 21 is communicated with the notch 16, and the air enters the channel 21 to supplement the gas pressure, so that the balance member 2 is restored; when the pressure in the passage 21 reaches a certain value, the balance member 2 blocks the communication between the passage 21 and the notch 16.

The pressure balancing device provided by the embodiment of the invention comprises: the device comprises a pipe body 1 and a balance piece 2, wherein the pipe body 1 is provided with a first end 12 and a second end 13 which are opposite, the first end 12 is provided with an inflow port 14, the second end 13 is provided with an outflow port 15, a cavity 11 is arranged in the pipe body 1, the inner diameter of the cavity 11 is larger than the diameters of the inflow port 14 and the outflow port 15, the cavity 11 is internally provided with the balance piece 2, the balance piece 2 is provided with a channel 21, and the channel 21 is used for communicating the inflow port 14 with the outflow port 15; the side wall of the pipe body 1 is provided with a notch 16; when the pressure in the passage 21 is reduced, the balance member 2 is pressed toward the passage 21, and air enters the passage 21 from the notch 16. In the prior art, the pipeline damage mode that prevents that pipeline negative pressure from leading to generally is increase pipeline intensity, and increase pipeline intensity usually reaches the effect that increases the bearing capacity through increasing pipeline wall thickness, and this makes the pipeline material waste comparatively serious. When the pressure in the channel 21 is reduced, the external air enters the pipe body 1 from the notch 16 to extrude the balance piece 2, so that the channel 21 is communicated with the notch 16, the air is filled into the channel 21 to supplement the pressure in the channel 21, the pressure in the channel 21 is increased, and the pipe body 1 is protected. Make the manufacturing of body 1 like this only need satisfy the intensity requirement of normal during operation, the pipe wall thickness is less like this, and required material is less, can practice thrift the cost, can increase of service life simultaneously, effectively reduces time and the expense of shutting down the maintenance.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Specifically, the notch 16 is provided on the first end 12 side so that the balancer 2 does not run out of the outflow port 15. The notch 16 is disposed at the first end 12 side, so that the air can be directly prevented from extruding the balancing member 2 near the second end 13 side, thereby effectively preventing the balancing member 2 from running off.

As shown in fig. 2, in order to make it easier for air to enter the passage 21 from the first end 12, specifically, the cross section of the pipe body 1 is gradually increased from the first end 12 to the second end 13. Thus, the thickness of the balancing member 2 near the first end 12 is significantly smaller than that of the balancing member 2 near the first end 12, so that the balancing member 2 near the first end 12 is more easily deformed by pressure, and a gap is formed between the balancing member 2 and the first end 12, so that the notch 16 communicates with the passage 21, thereby supplementing the gas pressure.

As shown in fig. 1, in order to prevent the balancing member 2 from flowing out of the drain opening, the flow-out opening further includes a baffle 17, and the baffle 17 is connected to the flow-out opening 15, extends toward the first end 12, and prevents the balancing member 2 from being pressed toward the passage 21. The baffle 17 is disposed near the second end 13, so that the balancing member 2 is supported near the second end 13, and even if air presses the balancing member 2 near the second end 13, the baffle 17 supports the balancing member 2, thereby effectively preventing the balancing member 2 from flowing out from the outflow port 15, and simultaneously, the balancing member 2 is forced more near the first end 12, so that the pressure balancing speed is faster. The baffle 17 is rounded near the first end 12 to prevent the baffle 17 from cutting the balance member 2 when the balance member 2 is pressed into the passage 21.

As shown in fig. 2, in order to balance the forces, specifically, the notches 16 are uniformly distributed on the sidewall of the pipe body 1. The plurality of notches 16 enable air to be supplemented more quickly, balance pressure, enable the stress of the pipe body 1 to be more uniform, and effectively prevent the pipe body 1 from being damaged due to overlarge pressure at a certain position. Meanwhile, the plurality of notches 16 are arranged, so that the time for the balance piece 2 to deform under stress is greatly shortened, and the service life of the balance piece 2 can be effectively prolonged.

The balance member 2 may be selected from various materials, and specifically, the balance member 2 is made of a rubber material. The rubber has good wear resistance, high elasticity, breaking strength and elongation, especially synthetic rubber, and also has strong sealing performance and good water resistance. And the classification of the rubber is various, and the rubber can adapt to different fluid requirements.

The balance member 2 is selected from various materials, and specifically, the balance member 2 is made of a silica gel material. Silicic acid is an amorphous substance, does not react with any substance except strong alkali and hydrofluoric acid, is insoluble in water and any solvent, is nontoxic and odorless, and has stable chemical properties. Different types of silica gel form different microporous structures due to different manufacturing methods. The chemical components and physical structure of silica gel determine that the silica gel has the characteristics that a plurality of other similar materials are difficult to replace: the lubricating coating has the advantages of high adsorption performance, good thermal stability, stable chemical property, higher mechanical strength and the like, wherein the lubricating coating is more conformable due to the good adsorption performance. In particular, the main chain of the organic silicon in the silica gel is very flexible, and the intermolecular action force of the organic silicon is much weaker than that of hydrocarbon, so that the organic silicon has lower viscosity, weaker surface tension, smaller surface energy and stronger film forming capability than that of hydrocarbon with the same molecular weight. This low surface tension and low surface energy are the main reasons for its versatile use: excellent performances of hydrophobicity, defoaming, stable foam, adhesion resistance, lubrication, glazing and the like.

The balance member 2 may be selected from a variety of materials, and specifically, the balance member 2 may be an airbag. The air bag is different from rubber and silica gel in that the rubber and the silica gel can realize elastic deformation due to the physical properties of the rubber and the silica gel, and the air bag utilizes the compressibility of air. The air has strong fluidity, the molecular distance is large, the air is easy to deform, extrude or expand, the air is easy to obtain, the cost is extremely low, the negative pressure working expansion amount needs to be reserved, the air bag can expand to the channel 21 under the influence of negative pressure during working, the channel 21 cannot be completely blocked, and otherwise, the air entering the channel 21 cannot flow to supplement pressure.

As shown in fig. 3, an embodiment of the present invention further provides a pressure balancing system, including: a duct 3, the pressure balancing device and the higher-level equipment 4, wherein the higher-level equipment 4 is connected to the inlet 14, and the outlet 15 is connected to the duct 3. Since the sudden reduction of the water pressure may damage the outlet side of the upper equipment 4, the pressure balancing means is provided at the outlet side of the upper equipment 4 to protect the pipe 3 from the pressure damage, and the pipe 3 does not need to be thickened, thereby reducing the cost of the pipe 3.

In order to facilitate maintenance and installation, specifically, the pipeline 3 and the pressure balancing device are detachably connected; the pressure balancing device is detachably connected with the upper device 4. The installation of being convenient for like this more, simultaneously can use according to the condition, also convenient improvement to current pipe-line system simultaneously need not to change pipeline or equipment in a large number.

The pressure balancing device provided by the embodiment of the invention comprises: the balance piece is arranged in the cavity and provided with a channel used for communicating the inflow port with the outflow port; the side wall of the tube body is provided with a notch; when the pressure in the passage is reduced, the balance member is pressed toward the passage, and air enters the passage from the notch. In the prior art, the pipeline damage mode that prevents that pipeline negative pressure from leading to generally is increase pipeline intensity, and increase pipeline intensity usually reaches the effect that increases the bearing capacity through increasing pipeline wall thickness, and this makes the pipeline material waste comparatively serious. When the pressure in the channel is reduced, the external air enters the pipe body from the notch to extrude the balance piece, so that the channel is communicated with the notch, the air is filled into the channel to supplement the pressure in the channel, the pressure in the channel is increased, and the pipe body is protected. Make the manufacturing of body like this only need satisfy the intensity requirement of normal during operation, the wall thickness of pipe is less like this, and required material is less, can practice thrift the cost, can increase of service life simultaneously, effectively reduces time and the expense of shutting down the maintenance.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A pressure equalizing device, comprising:

a pipe body having a first end and a second end opposite to the first end, the first end having an inflow port, the second end having an outflow port, the pipe body having a cavity therein, the cavity having an inner diameter greater than diameters of the inflow port and the outflow port, a balance member disposed in the cavity, the balance member having a passage for communicating the inflow port and the outflow port; the side wall of the pipe body is provided with a notch; when the pressure in the channel is reduced, the balance piece is pressed towards the channel, air enters the channel from the notch, the pressure of the air in the channel is supplemented, and the balance piece recovers and blocks the connection between the notch and the channel.

2. The pressure equalizing device of claim 1, wherein the notch is disposed on the first end side.

3. The pressure equalizing device of claim 2, wherein the cross-section of the tubular body increases from the first end to the second end.

4. The pressure equalizing device of claim 1, further comprising a baffle coupled to the flow outlet and extending toward the first end for inhibiting the equalizing member from compressing toward the passage.

5. The pressure equalizing device of any one of claims 2-4, wherein the plurality of notches are evenly distributed in the sidewall of the tube body.

6. A pressure equalisation device according to claim 5 wherein said equalising member is of a rubber material.

7. The pressure equalizing device of claim 5, wherein the equalizing member is formed of a silicone material.

8. The pressure equalizing device of claim 5, wherein the equalizing member is an air bag.

9. A pressure equalization system, comprising: a duct, a pressure equalizing device as in any one of claims 1-8, and a superior device, the superior device being connected to the inflow port and the outflow port being connected to the duct.

10. The pressure equalization system of claim 9, wherein the conduit and the pressure equalization device are removably coupled; the pressure balancing device is detachably connected with the superior equipment.