CN1458467A - Direct connection pressure separating system for heat supply and iar conditioner - Google Patents
Direct connection pressure separating system for heat supply and iar conditioner Download PDFInfo
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- CN1458467A CN1458467A CN 02109684 CN02109684A CN1458467A CN 1458467 A CN1458467 A CN 1458467A CN 02109684 CN02109684 CN 02109684 CN 02109684 A CN02109684 A CN 02109684A CN 1458467 A CN1458467 A CN 1458467A
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Abstract
The present invention belongs to the field of heat supply and air conditioner equipment, and features that it contains control tank, boosting pump, control valve, check valve in water supply pipe and check valve in water return pipe. The control tank is connected to water supply pipe in the upper part and the water return pipe in lower part; the control valve is connected to the output end of the control unit; the control unit has its input connected to the control output of the control tank; and the two check valves are interlinked with the pump separately.
Description
Affiliated technical field
The invention belongs to heat supply and air-conditioning equipment field, the direct-connected pressure piece-rate system of particularly a kind of heat supply, air-conditioning that the different user of operating pressure is linked together on Hydraulic Power System.
Background technology
In heat supply, air-conditioning system, when a local system is connected to main system, through regular meeting the different such contradictions with the main system operating pressure of local system appear.For example, in relatively large heat supply network, for keeping the normal operation of heat network system, the bearing capacity of the operating pressure meeting overage user radiator of main heat supply network, directly connection will cause the radiator explosion, in addition, the discrepancy in elevation between skyscraper or the physical features also can produce the contradiction between operating pressure and the bearing capacity; In the large-scale tall buildings air-conditioner water system, also there is the problem of underlying device and overlay device pressure-bearing great disparity.The reason one that produces contradiction is to be subjected to the restriction main system of economic technology condition and the bearing capacity of local system can't be consistent; The 2nd, the static pressure when system is out of service will make the pressure of local system or main system surpass security limitations, and this contradiction is given prominence to along with the increase of system scale and complexity.
Traditional solution of these problems is design pressures of increase system, perhaps, uses heat exchanger that local system and main system are isolated, or uses two water tanks or single water tank open type overflow riser systems.
The design pressure of increase system must increase the bearing capacity of equipment, and this will improve the investment of system.
Heat exchanger will cause the thermal efficiency to reduce and inevitably temperature loss, particularly in water at low temperature heat supply and air-conditioning system, use the heat exchanger shortcoming particularly evident, because water at low temperature is after heat exchange, supply water temperature further reduces, user's radiator area increases, and heating effect worsens, and the radiator of heat exchanger and increase has improved the investment of system; In air-conditioning system, use heat exchanger will improve the temperature of chilled water, in order to reduce the raising of chilled water temperature as far as possible, must increase the area of heat exchanger, the raising of temperature influences the effect of air-conditioning, has also increased the cost of heat exchanger and end-equipment simultaneously.These well-known unfavorable factors cause the function reduction of system, have reduced the entire system sexual clorminance widely.
Also there is the shortcoming that can't overcome in open type overflow riser systems.At first because be communicated with atmosphere, system inevitably enters a large amount of air, influences system's operation, corrosion pipeline; Secondly, open type overflow riser systems is a semicanal stream, is similar to soil stack, and big noise is arranged, the 3rd, and the kinetic energy of the water that falls in the standpipe will cause the system pressure fluctuation.
Summary of the invention
It is a kind of simple in structure that technical problem to be solved by this invention is to provide, reduce investment outlay, the different piece of system is linked together, and the pressure of the system of assurance different piece all is to isolate mutually when still stopping in operation, both there be not temperature loss, keep the different pressures level again, can avoid corrosive pipeline, do not have the direct-connected pressure piece-rate system of heat supply, air-conditioning of noise pollution again.
Technical solution of the present invention can realize according to following mode:
The present invention contains: control jar A, booster P, local system circulating pump P, a control valve RVn, be installed on shut-off valve AVm on the feed pipe, be installed on the shut-off valve AVn on the return pipe; The top of described control jar A communicates with feed pipe; The bottom of control jar A communicates with return pipe; Described control valve RVn connects the output of control module D; The control output end of the input termination control jar A of described control module D; Described shut-off valve AVn and shut-off valve AVm interlock with booster P respectively.
The present invention also is furnished with: local system circulating pump P also is installed on the feed pipe.
The present invention also is furnished with: control jar B, control valve RVm; The top of described control jar B communicates with feed pipe; The bottom of control jar B communicates with return pipe; Described control valve RVm connects the output of control module F; The control output end of the input termination control jar B of described control module F.
Control valve RVn of the present invention, control valve RVm are temperature control valve; On control jar A and control jar B, are furnished with several thermocouples; The control input end of above-mentioned thermocouple and control module D, control module F joins.Control valve RVn of the present invention, control valve RVm are pressure regulator.The present invention is simple in structure, and the different piece of system is linked together, and guarantees that the pressure of system's different piece all is to isolate mutually when still stopping in operation, does not promptly have temperature loss, keeps different stress levels again; Comparing major advantage of the present invention with traditional design is embodied in:
1, can not be subjected to the influence of main system operating pressure by the condition design and running of local system, reduced the pressure that local system or main system are born, reduce investment outlay.
2, compare with the heat exchanger barrier systems, at first, whole system is used the medium of identical parameters, can not reduce supply water temperature when heat supply, can not improve the temperature of chilled water during cooling, and this is particularly important to low temperature heating system and air-conditioning system; Secondly, because the heat exchange logarithm has a narrow range of temperature, heat exchanger area is quite big, particularly in the air-conditioning system, the heat exchange logarithm temperature difference only is 1.5～2 ℃, the area of required heat exchanger is quite surprising, and temperature reduces or improve the effect of not only influence heating and refrigeration, and large-area heat exchanger will improve the cost of system greatly simultaneously.
3, compare with other open system with two water tanks, system of the present invention can not enter air, has avoided the open system problem, the problem includes: the problem of pipeline heavy corrosion, does not have problems such as noise that open system overflow standpipe produces and pressure oscillation yet.
4, satisfactorily resolved system's isolated rapidly water attack problem that is produced under stoppage in transit and accident conditions.
Description of drawings
A kind of systematic schematic diagram when Fig. 1 is single jar for the present invention;
Second kind of systematic schematic diagram when Fig. 2 is single jar for the present invention;
Fig. 3 is lower than schematic diagram under the main system situation for the present invention at local system pressure;
Fig. 4 is higher than schematic diagram under the main system situation for the present invention at local system pressure;
Fig. 5 controls jar A2 and control jar B6 thermocouple Pareto diagram for the present invention;
Fig. 6 is structure chart of the present invention (operating mode shown in Figure 3);
Fig. 7 is a temperature layer control mode system diagram of the present invention;
Fig. 8 is a pressure reduction control mode system diagram of the present invention (downstream pressure adjuster);
Fig. 9 is a pressure reduction control mode system diagram of the present invention (upstream pressure adjuster);
The specific embodiment
The present invention is at system's run duration, the pressure of different piece separate and can guarantee by water pump and control valve (Fig. 3, Fig. 4).Under the situation of accident or stoppage in transit, in order to prevent the transmission of different piece static pressure, on hydraulic regime, must promptly isolate between local system and the main system, usually between local system and main system, rapid cut-off valve is installed, booster and rapid cut-off valve interlocking, valve is closed in the booster outage, and valve is left in the booster energising.
Yet valve-off has sizable danger so rapidly, will produce strong hydraulic regime transition one water attack, and such operation is forbidden usually, because the water attack meeting brings serious system destruction and equipment loss.
In design of the present invention,, allow arbitrarily controlled valve fast, and do not produce any compression shock owing to adopted special device.
Cardinal principle of the present invention is exactly to be communicated with for water return pipeline when rapid cut-off valve is closed, and promptly is not to make to flow to stop, but changes the direction that flows, and makes fluid enter another path, if flow velocity is constant, will water hammer can not take place.
In the position of rapid cut-off valve, when system moves, should there be tangible pressure reduction between water return pipeline.If there is pressure reduction, when valve closing, in isolated system, will cause the propagation of pressure oscillation.The another kind of expression way of this principle is: when valve turn-offs, when flow direction changed, system should keep and identical resistance when normally moving.Normal operation period will make pressure reduction remain at zero during whole service, must take certain measure.
In the system shown in Figure 3, supply water return pipeline always to interconnect on hydraulic regime, connecting pipeline goes to zero the pressure reduction for return pipe by water-filled tank body.
Feed pipe is connected to the top of tank body, and return pipe is connected to the bottom of tank body, and the temperature of tank deck is near supply water temperature, and jar end temperature is near return water temperature.Produce thermograde between the two.
Control valve RVn1 on the system water supply pipeline, control valve RVm5 stablize the temperature layer of retentive control jar constant, thereby guarantee that for pressure reduction between the backwater be zero.
Have no progeny when rapid cut-off valve AVm3 was closed by moment, the water in the main system feed pipe will enter the top of control jar A2, and the water of control jar A2 bottom will enter return pipe.Running status among the control jar B6 is similar to control jar A2.The principle of system shown in Figure 4 is identical with Fig. 3.
In Fig. 3, Fig. 4, the water of controlling among jar A2 and the control jar B6 should be static at run duration, that is to say, a connection control jar A2, a control jar B6 place supply the pressure reduction between the water return pipeline to should be zero.Can realize by following dual mode respectively:
1, control temperature layer mode
At first measure the main system supply and return water temperature and calculate its mean value Tm=(Tf+Tr)/2, then with the setting value of Tm as control valve RVn1, control valve RVm5, on control jar A2, control jar B6, be provided with 7 and be positioned at the differing heights evenly distributed thermocouple (see figure 5) of shape in the shape of a spiral, the mean value of these 7 temperature makes value of feedback equal setting value all the time as the value of feedback of control valve RVn1, control valve RVm5 by control valve RVn1 and control valve RVm5, and retentive control jar A2 is constant with the interior thermograde of control jar B6.Data acquisition is undertaken by control module D, F.
2, pressure reduction control mode
(Fig. 8) pressure regulator behind (Fig. 9), the valve before the use valve, making the backwater pressure reduction that supplies at a control jar A2, control jar B6 place is zero.At this moment, the control valve RVn1 among Fig. 3, Fig. 4, control valve RVm5 are replaced by pressure regulator.
Embodiment 1:
In system design, the present invention contains: shut-off valve V1, a control jar A2, be installed on the feed pipe 9 rapid cut-off valve AVm3, shut-off valve V5, a control jar B6 with booster P4 interlocking, shut-off valve V7, local system circulating pump P7, shut-off valve V9, shut-off valve V10, shut-off valve V8, control jar B6 thermograde control valve RVm5, shut-off valve V6 is installed on the magnetic valve AVn8 that interlocks with booster P4 on the return pipe 10, spring safety valve V15, control jar A2 thermograde control valve RVn1, shut-off valve V2.System water supply enters local system by feed pipe through shut-off valve V1, the control jar A2 that is linked in sequence and is connected in parallel with feed pipe, shut-off valve AVm3 with booster P4 interlocking, shut-off valve V5, booster P4, the control jar B6 that is connected in parallel with feed pipe, shut-off valve V7, local system circulating pump P7, shut-off valve V9 then enters hot user, the return pipe of drawing from the user shut-off valve V10 that is linked in sequence, shut-off valve V8, with the control jar B6 that return pipe is connected in parallel, control jar B6 thermograde control valve RVm5, shut-off valve V6, with the rapid cut-off valve AVn8 of booster P4 interlocking, spring safety valve V15, the control jar A2 that is connected in parallel with return pipe, control jar A2 thermograde control valve RVn1, shut-off valve V2, then, the local system backwater returns main system.In the said system structure, pressure reduction between local system and the main system is overcome by booster P4, the required pressure of local system inner loop is provided by local system circulating pump P7, control jar A2 and control jar B6 are communicated with for return pipe all the time with system, water in it utilizes control valve RVn1 at system's run duration, it is static that RVm5 keeps, and control module D, F send instruction adjusting control valve aperture after treatment by thermocouple collecting temperature data; When system stopped, what control jar A2 and control jar B6 were communicated with main system and local system respectively made it keep flowing velocity constant for backwater, and at this moment, the water in two jars flows.Safety valve V15 guaranteed when magnetic valve lost efficacy, the timely pressure release of system.
Claims (5)
1, a kind of heat supply, the direct-connected pressure piece-rate system of air-conditioning is characterized in that: contain: control jar A (2), booster P (4), a control valve RVn (1), be installed on shut-off valve AVm (3) on the feed pipe (9), be installed on the shut-off valve AVn (8) on the return pipe (10); The top of described control jar A communicates with feed pipe (9); The bottom of control jar A (2) communicates with return pipe (10); Described control valve RVn (1) connects the output of control module D (11); The control output end of the input termination control jar A (2) of described control module D (11); Described shut-off valve AVn (8) and shut-off valve AVm (3) interlock with pump P (4) respectively.
2, heat supply according to claim 1, the direct-connected pressure piece-rate system of air-conditioning is characterized in that: also be furnished with: local system circulating pump P (7) also is installed on the feed pipe (9).
3, heat supply according to claim 2, the direct-connected pressure piece-rate system of air-conditioning is characterized in that: also be furnished with: control jar B (6), control valve RVm (5): the top of described control jar B (6) communicates with feed pipe (9); The bottom of control jar B (6) communicates with return pipe (10); Described control valve RVm (5) connects the output of control module F (12); The control output end of the input termination control jar B (6) of described control module F (12).
4, according to claim 2 or 3 described heat supplies, the direct-connected pressure piece-rate system of air-conditioning, it is characterized in that: described control valve RVn (1), control valve RVm (5) are temperature control valve; On control jar A (2) and control jar B (6), are furnished with several thermocouples; The control input end of above-mentioned thermocouple and control module D (11), control module F (12) joins.
5, according to claim 2 or 3 described heat supplies, the direct-connected pressure piece-rate system of air-conditioning, it is characterized in that: described control valve RVn (1), control valve RVm (5) are pressure regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109684 CN1458467A (en) | 2002-05-16 | 2002-05-16 | Direct connection pressure separating system for heat supply and iar conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109684 CN1458467A (en) | 2002-05-16 | 2002-05-16 | Direct connection pressure separating system for heat supply and iar conditioner |
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| Publication Number | Publication Date |
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| CN1458467A true CN1458467A (en) | 2003-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02109684 Pending CN1458467A (en) | 2002-05-16 | 2002-05-16 | Direct connection pressure separating system for heat supply and iar conditioner |
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| CN (1) | CN1458467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103976909A (en) * | 2014-05-29 | 2014-08-13 | 广州丹奇日用化工厂有限公司 | Gerbera extracting solution as well as preparation method and application thereof |
-
2002
- 2002-05-16 CN CN 02109684 patent/CN1458467A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103976909A (en) * | 2014-05-29 | 2014-08-13 | 广州丹奇日用化工厂有限公司 | Gerbera extracting solution as well as preparation method and application thereof |
| CN103976909B (en) * | 2014-05-29 | 2016-06-08 | 广州丹奇日用化工厂有限公司 | A kind of Herba Leibnitziae extracting solution and its preparation method and application |
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