CN1787037A - Hydraulic pressure map experiment table for hydraulic working condition regulating - Google Patents
Hydraulic pressure map experiment table for hydraulic working condition regulating Download PDFInfo
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- CN1787037A CN1787037A CNA2005101222077A CN200510122207A CN1787037A CN 1787037 A CN1787037 A CN 1787037A CN A2005101222077 A CNA2005101222077 A CN A2005101222077A CN 200510122207 A CN200510122207 A CN 200510122207A CN 1787037 A CN1787037 A CN 1787037A
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Abstract
The invention discloses a hydraulic working condition regulating hydraulic pressure diagram test table, comprising a water supply system composed of circulating water tank, circulating water pump, fixed pressure water tank and overflow pipe, as well as pipe network and pipeline, regulating valve and so on, where between the fixed water tank and the circulating water tank, the pipe network and pipeline are connected in parallel with plural groups of user pipelines each composed of the first, second and third regulating valves and connecting with corresponding pressure measuring pipes at two ends of the second regulating valve; and the pipe network and pipeline connects through the fourth valve to the circulating water tank between the second and third regulating valves of the last group of user pipelines. The invention can perform the hydraulic pressure diagram test on the hydraulic working condition change of both a direct return pipe network and a reversed return pipe network as well as a combined return pipe network, able to visually know the influence of the change of the working condition of each heat user to the other users. The hydraulic pressure diagram test can deepen the understanding of the students to various mechanisms of the direct return pipe network, reversed return pipe network and combined pipe network during hydraulic adjustment and maladjustment and can do comparative trial.
Description
[technical field]
The present invention relates to the teaching and the experimental study field of heat supply hot water pipe net waterpower adjustment, particularly a kind of hydraulic pressure map experiment table for hydraulic working condition regulating.
[background technology]
Be used for heat supply hot water pipe net working conditions change pressure map experiment table for hydraulic in the prior art, can only do the pressure diagram analysis of the hydraulic regime variation of different formula pipe network.It is regulating for backwater valve of online each the hot user of tube that the hydraulic regime of different formula heating network is regulated, come each hot user's of balance available pressure, the close hot user's of end available pressure height just in different formula heating network, the available pressure of the terminal hot user of pipe network is low, regulate improper meeting and cause hydraulic misadjustment, the actual motion of heat supply network and management are caused very big difficulty.Have the function singleness of experiment table now, can not describe the hydraulic regime of the reversed return type heating network of favourable adjusting and balance, and the contrast experiment of various forms pipe network.
Therefore, in teaching and research, to understand the quality that various forms heating network hydraulic regime is regulated, just must solve the experiment of heating network hydraulic regime pressure diagram can be when the hydraulic regime variation of different formula, reversed return type, hybrid pipe network, carry out on the pipe network pressure diagram experiment that each point pressure changes, carry out qualitative analysis thereby be convenient to grasp the pressure controlled ABC of various forms heating network and hydraulic regime changed.
[summary of the invention]
Purpose of the present invention is intended to solve the deficiencies in the prior art, and a kind of hydraulic pressure map experiment table for hydraulic working condition regulating is provided, and this experiment table can carry out different formula heating network and reversed return type heating network on an equipment hydraulic regime changes experiment.
The scheme that the present invention is adopted for achieving the above object is a kind of hydraulic pressure map experiment table for hydraulic working condition regulating of design.It comprises by cyclic water tank, water circulating pump, constant pressure tank, the water system that run-down pipe is formed, and the pipe network pipeline, variable valve, piezometric tube and plate face, it is characterized in that said pipe network pipeline is to be made up of first, second and the 3rd control valve to being parallel with many groups between cyclic water tank at constant pressure tank, and at the two ends of second control valve and user's pipeline of corresponding piezometric tube connection; Said pipe network pipeline also in the end second of one group of user's pipeline with the 3rd control valve between directly be connected through another pipeline by the 4th valve with cyclic water tank.
The invention has the beneficial effects as follows: it both can do the pressure diagram experiment that different formula network hydraulic operation state changes, can do the pressure diagram experiment that reversed return type and hybrid network hydraulic operation state change again, make student's visual understanding to reversed return type heating network system by experiment, the balance that helps hydraulic regime, and each hot user's operating mode changes the back to the less advantage of other customer impact of pipe network; Deepen the student by experiment to different formula pipe network, reversed return type pipe network and hybrid pipe network, the understanding of the various mechanism when waterpower adjustment and during hydraulic misadjustment, and can be the contrast experiment.
[description of drawings]
Fig. 1 hydraulic pressure map experiment table for hydraulic working condition regulating structural representation;
Fig. 2 hydraulic pressure map experiment table for hydraulic working condition regulating system schematic;
The hydraulic curve figure of the different formula pipe network of Fig. 3 working conditions change;
The hydraulic curve figure of the different formula pipe network of Fig. 4 working conditions change;
The hydraulic curve figure of the different formula pipe network of Fig. 5 working conditions change;
The hydraulic curve figure of Fig. 6 reversed return type pipe network working conditions change;
The hydraulic curve figure of Fig. 7 reversed return type pipe network working conditions change;
The hydraulic curve figure of Fig. 8 reversed return type pipe network working conditions change.
The label of each parts is as follows among the figure: 1--water circulating pump, 2--cyclic water tank, 3--feed pipe, the 4--run-down pipe, 5--experiment table table top, 6--panel, the 7--constant pressure tank, 8--piezometric tube, 9--rule, the 10--press strip, 11--piezometric tube hose connector, 12--variable valve, the different formula backwater of 13--main, 14--reversed return type backwater main, 15--framework, the 16--castor, 17--pipe network water inlet pipe.
A, B, C, D, E, F, G represent hot user's valve respectively.
Be described in detail with reference to accompanying drawing below with reference to embodiments of the invention.
[embodiment]
Hydraulic pressure map experiment table for hydraulic working condition regulating of the present invention mainly includes as shown in Figure 1 and Figure 2 by cyclic water tank 2, water circulating pump 1, constant pressure tank 7, the water system that run-down pipe 4 is formed, and pipe network pipeline, control valve, piezometric tube 8 and plate face 6 etc.The pipe network pipeline be at constant pressure tank to the pipeline between cyclic water tank, form in parallel many groups by first control valve (H, J, L, N, P, R, T), the second control valve (A, B, C, D, E, F is G) with the 3rd control valve (I, K, M, O, Q, S U) forms, and at the two ends of second control valve and user's pipeline of corresponding piezometric tube connection.In order to carry out reversed return type pressure diagram experiment, in the end directly be connected through another pipeline by the 4th control valve V between the second control valve G of one group of user's pipeline and the 3rd control valve U with cyclic water tank.
When the present invention works, open water circulating pump, the water of cyclic water tank is pumped to constant pressure tank by feed pipe 3, keeps liquid level by run-down pipe in the water tank, and the water of certain liquid level enters pipe network through pipe network water inlet pipe 17.
The force value of pipe network each point is that two ends piezometric tube hose connector 11 by second control valve is connected with piezometric tube 8 in the experiment, reads force value by rule 9.Pipe network is tiled on the experiment table table top 5, and piezometric tube and rule are fixed on the panel by press strip 10, and whole experimental system is fixedly mounted on the framework 15, and framework 15 bottoms are installed four can movable castor 16.
Pipe network is a direct return system when closing variable valve V, regulate hot user's the second control valve A, B, C, D, E, F, G respectively, and the first and the 3rd variable valve H, I, J, K, L, M, N, O, P, Q, R, S, T, U can finish the pressure diagram experiment of different formula pipe network, and water flows back to cyclic water tank through different formula backwater main 13.
Fig. 3-5 is three kinds of different formula network hydraulic operation state pressure diagram experimental result hydraulic curves.
Shown in Figure 3: valve-off V, adjust pipe network and each user's valve each measuring point pressure of pipe network is formed as Fig. 3 normal condition solid line, turn down supply lines valve L each measuring point pressure of pipe network is formed as Fig. 3 new situation dotted line.The new situation pressure curve shows, after closing minor valve L, each the hot user before the valve L increases during available pressure ratio normal condition, and discharge increases, but the total flow of pipe network reduces during than normal condition, so that the new situation pressure curve changes is milder than normal condition pressure curve.Each user behind the valve L reduces during available pressure ratio normal condition, and discharge reduces, and the pipe network total flow reduces, so the new situation pressure curve is milder than normal condition pressure curve.
Shown in Figure 4: valve-off V, adjust pipe network and each user's valve each measuring point pressure of pipe network is formed as Fig. 4 normal condition solid line, close hot user's valve C each measuring point pressure of pipe network is formed as Fig. 4 new situation dotted line.The new situation pressure curve shows, after closing hot user's valve C, the available pressure of each hot user A, B before the hot user C increases, discharge increases during than normal condition, but the total flow of pipe network water supply main reduces during than normal condition, flow velocity reduces, so the new situation pressure curve is milder than normal condition pressure curve.The available pressure of the hot user D of behind the hot user C each, E, F, G increases, and discharge increases during than normal condition, and the pipe network total flow increases during than normal condition, and flow velocity increases, and specific frictional resistance increases, so the new situation pressure curve is steeper than normal condition pressure curve.After hot user's valve C closes, change than greatly away from the hot user of hot user C near the hot customer flow of hot user C.
Shown in Figure 5: valve-off V, adjust pipe network and each user's valve each measuring point pressure of pipe network is formed as Fig. 5 normal condition solid line, turn down supply lines valve H and valve I each measuring point pressure of pipe network is formed as Fig. 5 new situation dotted line.The new situation pressure curve shows, after turning down supply lines valve H and valve I, each hot user A, B, C, D, E, F, G reduce during available pressure ratio normal condition, discharge reduces, the total flow of pipe network reduces, flow velocity reduces, and changes milder than normal condition pressure curve so specific frictional resistance reduces the new situation pressure curve.Each hot user's discharge changes imbalance and changes for geometric ratio.
Pipe network is a reversed return system when opening variable valve V and close variable valve I, regulate hot user's the second control valve A, B, C, D, E, F, G respectively, and the first and the 3rd variable valve H, I, J, K, L, M, N, O, P, Q, R, S, T, U can finish the experiment of reversed return type pressure diagram, and water flows back to cyclic water tank through reversed return type backwater main 14.
Fig. 6-8 is three kinds of reversed return type network hydraulic operation state pressure diagram experimental result hydraulic curves.
Shown in Figure 6: valve-off I, open valve V, adjust each user's valve each measuring point pressure of pipe network is formed as Fig. 6 normal condition solid line, turn down supply lines valve L each measuring point pressure of pipe network is formed as Fig. 6 new situation dotted line.The new situation pressure curve shows, after closing minor valve L, the available pressure of each hot user before the valve increases, and discharge increases during than normal condition, but the total flow of pipe network water supply main reduces than normal condition, flow velocity reduces, so the curvilinear motion of pipe network water supply mains pressure is milder than normal condition pressure curve during new situation, backwater main discharge is bigger than normal condition, and flow velocity increases, specific frictional resistance increases, so the variation of new situation pressure curve is steeper than normal condition pressure curve.The available pressure of each user behind the valve reduces, discharge reduces, and the pipe network total flow reduces, so the variation of new situation pressure curve is milder than normal condition pressure curve, each hot customer flow is changed to non-geometric ratio variation before the valve L, and each hot customer flow is changed to the geometric ratio variation behind the valve L.
Shown in Figure 7: valve-off I, open valve V, adjust pipe network and each user's valve each measuring point pressure of pipe network is formed as Fig. 7 normal condition solid line, close hot user's valve C each measuring point pressure of pipe network is formed as Fig. 7 new situation dotted line.The new situation pressure curve shows, after closing hot user's valve C, the available pressure of each hot user A, B before the hot user C increases, discharge increases, the total flow of pipe network water supply main reduces than normal condition before the hot user C, flow velocity reduces, and specific frictional resistance reduces, so the new situation pressure curve is milder than normal condition pressure curve.The hot user D of behind the hot user C each, E, F, the available pressure of G increase, and discharge increases, and pipe network water supply main total flow increases than normal condition, and flow velocity increases, and specific frictional resistance increases, so the new situation pressure curve is steeper than normal condition pressure curve.The total flow of pipe network backwater main increases than normal condition before the hot user C,, flow velocity increases, and specific frictional resistance increases, so the new situation pressure curve is steeper than normal condition pressure curve.The available pressure of the hot user D of behind the hot user C each, E, F, G increases, and discharge increases, but pipe network backwater main total flow reduces than normal condition, and flow velocity reduces, and specific frictional resistance reduces, so the new situation pressure curve is milder than normal condition pressure curve.After hot user's valve C closes, change than greatly away from the hot user of hot user C near the hot customer flow of hot user C.
Shown in Figure 8: valve-off I, open valve V, adjust pipe network and each user's valve each measuring point pressure of pipe network is formed as Fig. 8 normal condition solid line, turn down supply lines valve H each measuring point pressure of pipe network is formed as Fig. 8 new situation dotted line.The new situation pressure curve shows, after turning down supply lines valve H, each hot user A, B, C, D, E, the available pressure of F, G reduce, discharge reduces, the total flow of pipe network reduces, flow velocity reduces, so that specific frictional resistance reduces the new situation pressure curve is milder than normal condition pressure curve, pipe network system each point force value is low during than normal condition.The available pressure geometric ratio of each hot user diminishes, and the water yield is changed to geometric ratio and changes.
Claims (4)
1 one kinds of hydraulic pressure map experiment table for hydraulic working condition regulating, comprise by cyclic water tank, water circulating pump, constant pressure tank, the water system that run-down pipe is formed, and pipe network pipeline, variable valve, piezometric tube and plate face is characterized in that said pipe network pipeline is to be made up of first, second and the 3rd control valve to being parallel with many groups between cyclic water tank at constant pressure tank, and at the two ends of second control valve and user's pipeline of corresponding piezometric tube connection; Said pipe network pipeline also in the end second of one group of user's pipeline with the 3rd control valve between directly be connected through another pipeline by the 4th valve with cyclic water tank.
2 according to the described pressure map experiment table for hydraulic of claim 1, it is characterized in that the two ends of said second control valve are connected with piezometric tube by hose connector.
3 according to claim 1 or 2 described pressure map experiment table for hydraulic, it is characterized in that said piezometric tube is fixed on the plate face, and be inlaid with rule on the plate face.
4 according to the described pressure map experiment table for hydraulic of claim 3, it is characterized in that said experiment table is fixedly mounted on the framework, and the framework bottom is installed four can movable castor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101222077A CN100444214C (en) | 2005-12-06 | 2005-12-06 | Hydraulic pressure map experiment table for hydraulic working condition regulating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101222077A CN100444214C (en) | 2005-12-06 | 2005-12-06 | Hydraulic pressure map experiment table for hydraulic working condition regulating |
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| Publication Number | Publication Date |
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| CN1787037A true CN1787037A (en) | 2006-06-14 |
| CN100444214C CN100444214C (en) | 2008-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679174A (en) * | 2016-03-28 | 2016-06-15 | 华北水利水电大学 | Small water conservancy experiment table |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219519Y (en) * | 1994-08-31 | 1996-02-07 | 天津市自动化仪表成套设计所 | Simulator for experiment of automatic regulating system |
| JP4871453B2 (en) * | 2001-03-30 | 2012-02-08 | パナソニック環境エンジニアリング株式会社 | Experience training device |
| JP4214308B2 (en) * | 2003-02-05 | 2009-01-28 | 重道 門脇 | Hydrodynamic experiment equipment |
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2005
- 2005-12-06 CN CNB2005101222077A patent/CN100444214C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679174A (en) * | 2016-03-28 | 2016-06-15 | 华北水利水电大学 | Small water conservancy experiment table |
| CN105679174B (en) * | 2016-03-28 | 2018-05-25 | 华北水利水电大学 | A kind of small water conservancy experimental bench |
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| CN100444214C (en) | 2008-12-17 |
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Granted publication date: 20081217 Termination date: 20111206 |