阅读说明：本技术 一种多段式减压盘管装置的使用方法 (A kind of application method of multisection type decompression coil device ) 是由 常喜兵 李浩亮 赵威 于 2019-09-03 设计创作，主要内容包括：本发明设计一种减压盘管装置的使用方法,公开了一种多段式减压盘管装置的使用方法,主要包括以下步骤：将直管加工成半圆弧形管、整圆弧形管和U型管三种弧形盘管单体,用水压表测量水流参数,计算所需盘管管径,确定盘管初步结构,计算盘管阻力系数和盘管长度,最后确定盘管最终结构。本技术方案安装、拆卸方便,便于运输；可以通过增减盘管单体的数量,调整盘管装配总长度L,达到灵活调整盘管出口压力P<Sub>2</Sub>与流量Q的目的,满足使用者对出口压力、流量的微调。(The present invention designs a kind of application method for depressurizing coil device, disclose a kind of application method of multisection type decompression coil device, it mainly comprises the steps that and straight tube is processed into three kinds of semicircular arc pipe, full circle curved pipe and U-tube arc coil pipe monomers, stream parameters are measured with water pressure gauge, coil pipe caliber needed for calculating, it determines coil pipe preliminary structure, calculates coil pipe resistance coefficient and coil lengths, finally determine coil pipe final structure.The technical program installation, convenient disassembly, are readily transported；Total length L can be assembled, reaches and coil outlets pressure P is adjusted flexibly by the quantity of increase and decrease coil pipe monomer, adjustment coil pipe 2 With the purpose of flow Q, meet fine tuning of the user to outlet pressure, flow.)

1. a kind of application method of multisection type decompression coil device, which comprises the following steps:

A, straight tube is processed into three kinds of semicircular arc pipe, full circle curved pipe and U-tube arc coil pipe monomers (1.1), and in arc Ring flange (1.1.1) is arranged in coil pipe monomer (1.1) both ends, total convenient for arc coil pipe monomer (1.1) is assembled into helical coiled tube At (1)；

B, the flow velocity u of water flow at coil inlet is measured with flow velocity₀；The pressure P of water flow at coil inlet is measured using water pressure gauge₁；

C, actually required water flow is set as Q₀, according to formula Q₀=πd₀ ²u₀/ 4, calculate coil pipe caliber d₀；

It D, include setting coil pipe parameter, the coil pipe parameter includes coil pipe circle number n, coil pipe screw pitch b, coil diameter D and coil pipe Caliber d₀；

E, coil pipe is assembled, shape, size with arc coil pipe monomer (1.1) pipe end are set on connecting plate (1.4) Identical limbers (1.4.1) communicates adjacent arc coil pipe monomer (1.1) pipeline, then sets around limbers (1.4.1) Mounting hole (1.4.2) corresponding with ring flange (1.1.1) is set, several arc coil pipe monomers (1.1) are finally passed through into flange Disk (1.1.1) is set on connecting plate (1.4), constitutes a helical coiled tube assembly (1)；

F, flow rate of water flow is accessed in the inlet of assembled helical coiled tube assembly (1) and pressure is respectively u and P₁₀Water source, And measure the pressure P of helical coiled tube assembly (1) exit water flow₂₀；

G, according to formula L²=n²(b²+9.87D²) calculate the length L of helical coiled tube assembly (1)；Further according to formula P= P₁₀- P₂₀Calculate the pressure difference of helical coiled tube assembly (1) inlet and outlet；Then according to formula f₀=2∆Pd₀/ρu²L is calculated Placing pipe resistance coefficient f₀；

H, by the pressure P of actually required water flow₂Bring formula P into₀=P₁- P₂Calculate actually required helical coiled tube assembly (1) The pressure difference P of inlet and outlet₀；Further according to formula P₀=f₀ρu₀ ² L₀ /2d₀Calculate actually required helical coiled tube assembly (1) Length L₀；

I, compare L and L₀Size, if L > L₀, then arc coil pipe monomer (1.1) is dismantled, if L < L₀, then increase arc coil pipe monomer (1.1), until the length of helical coiled tube assembly (1) reaches L₀。

2. a kind of application method of multisection type decompression coil device as described in claim 1, which is characterized in that the step E is also Including arc coil pipe monomer (1.1) pipe end and limbers (1.4.1) to be smoothly connected, and in junction, sealing knot is set Structure.

3. a kind of application method of multisection type decompression coil device as described in claim 1, which is characterized in that in the step E, Equidistant limbers (1.4.1) is set on connecting plate (1.4), passes through the circle being arranged between two neighboring limbers (1.4.1) Heart distance makes the screw pitch b of helical coiled tube assembly (1).

4. a kind of application method of multisection type decompression coil device as described in claim 1, which is characterized in that the step E is also Including selecting arc coil pipe monomer (1.1) type, selection meets the semicircular arc pipe or full circle curved pipe of setup parameter, Huo Zhexuan Select the semicircular arc pipe and U-tube for meeting setup parameter.

5. a kind of application method of multisection type decompression coil device as described in claim 1, which is characterized in that the step I is also Import straight tube identical with arc coil pipe monomer (1.1) caliber is respectively set in the head end and end for being included in coil pipe assembly (1) (1.2) and straight tube (1.3) are exported.

Technical field

The present invention relates to a kind of application methods for depressurizing coil device more particularly to a kind of multisection type to depressurize coil device Application method.

Background technique

There is very high requirement to the pressure of water, flow in some hydroelectric project application fields.It is needed if core main pump close Envelope uses a kind of decompression coil pipe, could work normally in the case where depressurizing coil pipe offer and possessing the water of specified pressure with main pump. Therefore, it is necessary to the pressure to water, flows accurately to be controlled, to meet the functional requirement of equipment.The pressure at diversion water source, flow Pressure, flow needed for often higher than some fields, and depressurize coil pipe and control work well is played to the pressure and flow of water With, due to depressurize coil pipe simple structure and convenient processing, obtained extensive utilization.By analyzing Darcy formula P=f_dρ u²Known to L/2d: the density p of disk tube fluid, the caliber d of coil pipe, coil pipe pipe range L, resistance coefficient f_d, disk tube fluid Average speed u can directly affect coil pipe inlet pressure (diversion source pressure) P₁With outlet pressure (pressure needed for field) P₂'s Difference P；Due to water flow Q=π d²U/4, coil outlets water flow pressure P₂ = P₁﹣ P, then have P₂ = P₁﹣ 8f ρ LQ²/ (π²d⁵).Therefore, coil pipe in the prior art there is problems:

(1) its coil pipe of existing decompression coil pipe is process by a complete straight tube coiled coil, and coil pipe circle number n is non-adjustable It is whole, total length L is immutable, be unable to flexible modulation so as to cause the technical parameters such as pressure, flow of its outlet, further result in The scope of application of decompression coil pipe is restricted；

(2) coil outlets pressure P₂The negatively correlated mathematical relationship with the square value of flow Q, the change of flow Q size is to P₂Shadow Sound is very big.If inlet pressure P₁It remains unchanged, when flow demand Q changes, outlet pressure P₂Larger change will occur Change, further influences the water pressure quality of technical water supply；

(3) complete pressure reducing disc pipe volumes are big, need to account for larger space, all bring many troubles to transport and installation；

(4) since coil lengths cannot adjust, then entire coil pipe is needed replacing, waste money while also wastes material.

Summary of the invention

For above with respect to deficiency existing for existing decompression coil pipe, the present invention provides a kind of multisection type decompression coil device Application method realizes that the pressure of flexible modulation water and flow provide for technical water supply by changing the total length L of decompression coil pipe It is convenient.It is realized especially by following technical scheme:

1, a kind of application method of multisection type decompression coil device, which comprises the following steps:

A, straight tube is processed into three kinds of semicircular arc pipe, full circle curved pipe and U-tube arc coil pipe monomers, and in arc coil pipe list Ring flange is arranged in body both ends, convenient for arc coil pipe monomer is assembled into helical coiled tube assembly；

B, the flow velocity u of water flow at coil inlet is measured with flow velocity₀；The pressure of water flow at coil inlet is measured using water pressure gauge P₁；

C, actually required water flow is set as Q₀, according to formula Q₀=πd₀ ²u₀/ 4, calculate coil pipe caliber d₀；

It D, include setting coil pipe parameter, the coil pipe parameter includes coil pipe circle number n, coil pipe screw pitch b, coil diameter D and coil pipe Caliber d₀；

E, coil pipe is assembled, water flowing identical with shape, the size of the arc coil pipe monomer pipe end is set on connecting plate Hole communicates adjacent arc coil pipe monomer pipeline, mounting hole corresponding with ring flange is then arranged around limbers, finally Several arc coil pipe monomers are set on connecting plate by ring flange, constitute a helical coiled tube assembly；

F, flow rate of water flow is accessed in the inlet of assembled helical coiled tube assembly and pressure is respectively u and P₁₀Water source, and Measure the pressure P of helical coiled tube assembly exit water flow₂₀；

G, according to formula L²=n²(b²+9.87D²) calculate the length L of helical coiled tube assembly；Further according to formula P=P₁₀- P₂₀Calculate the pressure difference of helical coiled tube assembly inlet and outlet；Then according to formula f₀=2∆Pd₀/ρu²L calculates coil pipe resistance Coefficient f₀；

H, by the pressure P of actually required water flow₂Bring formula P into₀=P₁- P₂Calculate actually required helical coiled tube assembly into The pressure difference P of outlet₀；Further according to formula P₀=f₀ρu₀ ² L₀ /2d₀Calculate the length of actually required helical coiled tube assembly Spend L₀；

I, compare L and L₀Size, if L > L₀, then arc coil pipe monomer is dismantled, if L < L₀, then increase arc coil pipe monomer, until The length of helical coiled tube assembly reaches L₀。

The step E further includes being smoothly connected arc coil pipe monomer pipe end with limbers, and be arranged in junction Sealing structure.

In the step E, equidistant limbers is set on connecting plate, passes through the circle being arranged between two neighboring limbers Heart distance makes the screw pitch b of helical coiled tube assembly.

The step E further includes selecting arc coil pipe monomeric species, and selection meets the semicircular arc pipe or whole of setup parameter Arc-shaped pipe, or selection meet the semicircular arc pipe and U-tube of setup parameter.

The step I further include be respectively set in the head end of coil pipe assembly and end it is identical with arc coil pipe monomer caliber Import straight tube and outlet straight tube.

A kind of multisection type decompression coil device, main includes several arc coil pipe monomers being set on connecting plate；Institute It states arc coil pipe monomer two-port and is provided with ring flange；Limbers, the limbers surrounding setting are provided on the connecting plate There is mounting hole corresponding with ring flange；The arc coil pipe monomer is installed on connecting plate by the ring flange, and adjacent two It is communicated between a arc coil pipe monomer by the limbers, several described arc coil pipe monomers are from one end of the connecting plate It is arranged successively and is connected to the other end, cooperate and constitute a helical coiled tube assembly.Connecting plate has firm, support plate pipe assembly Effect, connecting plate is added in coil pipe assembly, reduce water impulse force give coil pipe bring injury, increase the use of coil pipe Service life.

The more slight drag of the caliber of coil pipe is bigger, is primarily due to when coil pipe caliber is smaller, the boundary layer of coil pipe will be to coil pipe The turbulent flow center of interior fluid is affected, to increase the flow resistance of coil pipe.The flow resistance of caliber more small coils more Greatly, the length L for depressurizing coil pipe also will be shorter.Therefore, the limbers being set on connecting plate and arc coil pipe monomer pipe end Shape, size it is identical, and arc coil pipe monomer pipe end is smoothly connected with the limbers, and junction is provided with sealing knot Structure guarantees that coil pipe pipeline configuration is uniform, water flow is allowed not influenced by pipeline structural obstructions in coil pipe pipeline.

The resistance coefficient f of coil pipe_dIncrease with the increase of curvature ratio δ.When fluid flows in coil pipe, outside coil pipe caliber By the micro cyclone of generation, these vortexs will generate certain additional drag for wall side and inner wall side.When coil diameter reduces, coil pipe Outer wall side and inner wall side generate micro cyclone will increase, additional drag increase, so as to cause the pressure difference of coil pipe import and export Increase.Therefore, for ease of calculation, arc coil pipe monomer is processed into semicircular arc pipe and full circle curved pipe, according to caliber and/ Or the difference of arc diameter, arc coil pipe monomer is processed into different models；For the caliber for guaranteeing a complete disc pipe assembly Equal everywhere, the model for constituting the arc coil pipe monomer of a coil pipe assembly is identical.If the arc coil pipe monomer in coil pipe assembly Only with semicircular arc pipe, then two connecting plates and semicircular arc pipe are needed to cooperate, two mouthfuls of semicircular arc pipe are respectively arranged in On two connecting plates.One semicircular arc pipe a port and a port of another semicircular arc pipe are seamlessly connected, and are constituted One full circle curved pipe, if the arc coil pipe monomer in coil pipe assembly only with full circle curved pipe, only needs a connecting plate Cooperate with full circle curved pipe, the two-port of full circle curved pipe is respectively arranged at the adjacent mounting hole on a connecting plate.If disk Arc coil pipe monomer in pipe assembly contains semicircular arc pipe and full circle curved pipe, then needs at least two connecting plates and arc The cooperation of coil pipe monomer, a port and full circle curved pipe of semicircular arc pipe are installed on same root connecting plate, another port peace Loaded on other connecting plate.

There are also a kind of coil pipe monomer of shape, i.e. U-tube, be seamlessly connected by a semicircular arc pipe and two straight tubes and At the distance of two-port and being equidistant for semicircular arc pipe two-port.Arched plate according to U-tube as coil pipe assembly Pipe monomer needs to cooperate with semicircular arc pipe.The phenomenon that Secondary Flow is generated in coil pipe due to fluid increases fluid flowing Energy loss, so the pressure difference of coil pipe inlet and outlet is bigger than the pressure difference of equal length straight tube, therefore, U-tube and semicircular arc The coil pipe assembly that pipe cooperation is constituted is suitable for small to water flow drop requirements and not high to exit water flow pressure precise requirements Environment.

In normal work, fluid flowing reaches equilibrium state to coil pipe, and water flows in coil pipe may be considered three stability maintenances State turbulent flow.Consider the own wt of coil pipe and the stability of coil pipe assembly, it should not be using there are too many or very little mounting holes Therefore the ring flange in rectangular four hole is arranged in arc coil pipe monomer two-port, rectangular four hole ring flange compares polygon method in ring flange Blue disk or circular flange disk more save material, work together more more stable than triangle ring flange.Using rectangular four hole ring flange, arc can be made What shape coil pipe monomer can be consolidated more is installed on connecting plate, is not easy to loosen.

Coil pipe assembly at least contains a connecting plate, and the mounting hole on connecting plate is corresponding with ring flange, therefore, connecting plate On mounting hole four be one group, mounting hole equidistant arrangement on connecting plate as unit of group, the group distance of mounting hole determines The screw pitch of coil pipe assembly.The length of connecting plate is lengthened with the increase of mounting hole group quantity.

To guarantee that the fluid being flowed into coil pipe is not influenced by entry condition, in coil inlet boundary, (i.e. coil pipe is total At head end) increase setting import straight tube, reduce influence of the fluid mutation to pressure.In order to which water flow is not influenced by export structure, Outlet straight tube is arranged in coil pipe mouth boundary (i.e. coil pipe assembly end) in the use for facilitating water outlet simultaneously.Import straight tube and outlet Straight tube has certain length, can increase the total length of coil pipe, be finely adjusted to outlet pressure.

Bring of the present invention the utility model has the advantages that

(1) the technical program uses combined type coil pipe assembling scheme, and multiple arcs coil pipe monomer is installed on connection by flange group On plate, complete decompression coil pipe is constituted.Arc coil pipe monolithically quantity can be increased and decreased as needed, further adjust the overall length of coil pipe L is spent, coil outlets pressure P is adjusted flexibly to reach with this₂With the purpose of flow Q, meet user to outlet pressure, flow Fine tuning demand；

(2) it uses connecting plate in device to consolidate coil pipe assembly, support, the impulse force for reducing water is hurt to coil pipe bring Evil, increases the service life of coil pipe；

(3) effect of decompression coil pipe has greatly been played, i.e. set of device can be applicable in by the increase and decrease to coil pipe monomer In identical and/or different places different pressures, flow demand；

(4) it through coil pipe multistage, is easily installed and dismantles, arc coil pipe monomer occupies little space, and also provides convenience to transport；

(5) simple and convenient only with replacement coil pipe monomer if coil pipe damages, save the time.

Detailed description of the invention

It is of the invention aforementioned and be detailed description below and become more apparent upon when reading in conjunction with the following drawings, in which:

Fig. 1 is a kind of preferred coil pipe assembly diagram；

Fig. 2 is a kind of preferred coil pipe assembly diagram；

Fig. 3 is semicircular arc pipe schematic diagram；

Fig. 4 is U-tube schematic diagram；

Fig. 5 is full circle curved pipe schematic diagram；

Fig. 6 is connecting plate schematic diagram；

In figure:

1, coil pipe assembly；1.1, arc coil pipe monomer；1.1.1, ring flange；1.2, import straight tube；1.3, straight tube is exported；1.4, even Fishplate bar；1.4.1, limbers；1.4.2, mounting hole.

Specific embodiment