CN210044743U

CN210044743U - Pressure stabilizing and flow controlling device of positive displacement pump set and fire extinguishing system with same

Info

Publication number: CN210044743U
Application number: CN201920752398.2U
Authority: CN
Inventors: 陈涛; 罗肖毛
Original assignee: Guangdong Gunnebo Fire Technology Co Ltd
Current assignee: Guangdong Gunnebo Fire Technology Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-02-11
Anticipated expiration: 2029-05-23

Abstract

The utility model discloses a positive displacement pump group steady voltage, accuse flows device and has device's fire extinguishing system, the utility model discloses a plurality of unit pump groups carry out the module combination, one of them unit pump adopts electrodeless speed governing control flow size, the quantity that unit pump was opened to other unit pump according to required flow size control comes the flow size, realize the accurate control of flow, reduce the unnecessary energy consumption, guarantee the pressure stability of delivery port, when a unit pump group has the trouble, need not stop other unit pump groups, guarantee the stability of whole system, be convenient for install and overhaul, also be convenient for set up corresponding relevant part, realize better technological effect, use foretell positive displacement pump group steady voltage, the fire extinguishing system of accuse flow device can gain obvious progress for current technique.

Description

Pressure stabilizing and flow controlling device of positive displacement pump set and fire extinguishing system with same

Technical Field

The utility model relates to a fire-fighting equipment field especially relates to a positive displacement pump assembly steady voltage, accuse flow device and have device's fire extinguishing system.

Background

When the displacement pump is in operation, energy is applied periodically to the interface of one or more mobile active accessories, the liquid, i.e. equivalent to the volume, by the action of the force, causing a direct increase in pressure, reaching the pressure required to convey the liquid through the valve or pipe until it reaches the discharge line. Because the output flow of the displacement pump in unit time can not change, when the flow of the outlet of the pump group changes, the outlet pressure of the pump can change along with the change. The existing common pressure stabilizing method is to install a mechanical pressure regulating type pressure stabilizing and relieving valve or an electric valve at the outlet of the pump, and to discharge the redundant flow at the outlet of the pump, thereby achieving the purpose of stabilizing the outlet pressure of the pump. The pressure regulating method has the disadvantages that the pressure can be regulated only in a certain small flow range, and the pump set works according to the maximum flow no matter what the flow required by the system is, so that the energy consumption is large, and the energy conservation and the environmental protection are not convenient. Simultaneously, the pump package of prior art generally adopts the series connection setting, realizes the cooperation work through control system control, when having the trouble, can make whole device stop work, and the installation of being not convenient for simultaneously is overhauld, also is not convenient for set up corresponding relevant part, and the pressure of pump package is unstable simultaneously, the shock attenuation effect is poor, for realizing better technological effect, urgently need develop a volume formula pump group steady voltage, accuse flow device of being applied to in the fire extinguishing systems on the market.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes at least one defect (not enough) of the prior art, and provides a positive displacement pump set voltage stabilization and flow control device and a fire extinguishing system with the device.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a pressure stabilizing and flow controlling device for a positive displacement pump set comprises a water tank, a water inlet and a water outlet, wherein the water inlet is connected with the water tank, the water outlet is connected with the water tank through a safety valve, pressure relief is completed, and pressure stability is guaranteed; the variable-frequency speed regulation control and start-stop module is connected with one of the unit water pumps, control over the one of the unit water pumps is achieved, start-stop and stepless speed regulation control flow of the one of the unit water pumps are achieved, the start-stop module is connected with the other unit water pumps respectively, control over the other unit water pumps is achieved, start-stop of the other unit water pumps is achieved, a pressure transmitter is installed at a water outlet, the pressure transmitter is connected with the controller, the pressure transmitter measures pressure needed by a water outlet and transmits the pressure to the controller, and the controller controls the unit water pumps to achieve output of the needed pressure through the variable-frequency speed regulation control, the start-stop module and the start-stop module.

As preferred technical scheme, a plurality of unit pump package include pump package front end and pump package rear end respectively, be connected with the unit water pump between pump package front end and the pump package rear end. The front end of the unit pump set is sequentially connected with a maintenance valve, a filter and a flexible joint. The rear end of the unit pump set is sequentially connected with a connecting hose and a water stop valve. Convenient maintenance realizes filtering capability, sets up simultaneously and rubs the nature and connect the more stable of pressure in the pipeline with coupling hose assurance, has good shock attenuation effect simultaneously.

The utility model provides a fire extinguishing system, includes municipal water supply system and subregion valve unit, be connected with foretell positive displacement pump group steady voltage, accuse between municipal water supply system and the subregion valve unit and flow the device, the subregion valve unit is connected with the thin water smoke shower nozzle of setting in the guard area, still be provided with terminal circuit in the guard area, be connected with temperature-sensing detector, smoke detector, blow indicator, audible-visual annunciator and emergency stop button on the terminal circuit respectively, terminal circuit connects fire alarm control ware, fire alarm control ware with positive displacement pump group steady voltage, the controller of accuse flow the device is connected.

As preferred technical scheme, be provided with the energy storage ware between positive displacement pump assembly steady voltage, accuse flow device and the subregion valve unit, can continue the energy, steady pressure makes things convenient for the energy supply.

As preferred technical scheme, municipal water supply system is equipped with first filter, is convenient for filter impurity. The municipal water supply system is provided with a water supply valve, which is opened and closed as required. The partition control valve group is provided with a pressure sensor connected with the fire alarm controller, the pressure value of the partition control valve group is monitored in real time, and input and output can be adjusted conveniently.

It should be noted that the above-mentioned connection manner adopts a pipe connection or an electrical connection, and those skilled in the art should understand that those skilled in the art can implement the above-mentioned embodiments.

Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:

the utility model relates to a positive displacement pump assembly steady voltage, accuse flows the device and adopts a plurality of unit pump package to carry out the module combination, one of them unit pump adopts electrodeless speed governing control flow size, other unit pumps control the quantity of opening the unit pump according to required flow size and come the control flow size, realize the accurate control of flow, reduce the unnecessary energy consumption, guarantee the pressure stability of delivery port, when a unit pump package has the trouble, need not stop other unit pump package, guarantee the stability of whole system, be convenient for install and overhaul, also be convenient for set up corresponding relevant part, realize better technological effect, use foretell positive displacement pump assembly steady voltage, the fire extinguishing systems who accuse flows the device can gain obvious progress for current technique.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a pressure stabilizing and flow controlling device of a positive displacement pump set of the present invention.

Fig. 2 is a schematic view of a fire suppression system of the present invention.

Detailed Description

The following is a detailed description of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited to these descriptions, and it should be noted that the features of the examples and examples in the present application may be combined with each other without conflict.

Referring to fig. 1, a positive displacement pump set pressure stabilizing and flow controlling device 1 includes a water tank 2, a water inlet 3 connected to the water tank 2, and a water outlet 4 connected to the water inlet 3, wherein a plurality of

unit pump sets

51, 52, 53 are connected in parallel between the water inlet 3 and the water outlet 4, each unit pump set includes a

unit water pump

51a, 52a, 53a, the

unit water pumps

51a, 52a, 53a are respectively connected to a controller 6, and the controller 6 includes a variable frequency speed control, a start/stop module, and a start/stop module; the variable-frequency speed regulation control and start-stop module is connected with one unit water pump 51a, the start-stop module is connected with the other

unit water pumps

52a and 53a, the water outlet 4 is provided with a pressure transmitter 7, and the pressure transmitter 7 is connected with the controller 6.

The water outlet 4 is connected with the water tank 2 through a safety valve 8.

The plurality of

unit pump groups

51, 52, 53 respectively include a pump group front end and a pump group rear end, and

unit water pumps

51a, 52a, 53a are connected between the pump group front end and the pump group rear end. The front end of the unit pump group is connected with a service valve 9, a filter 10 and a flexible joint 11 in sequence. The rear end of the unit pump group is sequentially connected with a connecting hose 12 and a water stop valve 13.

In an application scenario, the output flow of one of the unit water pumps 51a may be automatically adjusted and changed from (0.1-1) × q. The output flow rates of the remaining

unit water pumps

52a, 53a (the number of which is 0 to N) are automatically adjusted and changed from 0 to N × q. (N is 0,1,2,3 … … constant). The pressure transmitter 7 feeds back the flow required by the water outlet 4 to the controller 6, and the controller 6 automatically controls the number of the other

unit water pumps

52a and 53a to be started and the opening flow of one unit water pump 51 a. From the above, it can be seen that: the total flow Q of the pump set is (0.1-1) Q + N Q, and X is 0.1-1, then the following are provided: q ═ X + N × Q, where: q is the total flow of the pump set, Q is the unit pump flow, and X is the variable: 0.1-1, wherein N is a constant: 0,1,2,3 … … constant.

Therefore, the total flow Q of the pump set realizes stepless automatic regulation change from 0.1 to N times of the flow Q of the unit pump, thereby ensuring the stability of the output pressure of the outlet of the pump set.

Referring to fig. 2, a fire extinguishing system comprises a municipal water supply system 14 and a partition control valve group 15, wherein the above-mentioned positive displacement pump group pressure stabilizing and flow control device 1 is connected between the municipal water supply system 14 and the partition control valve group 15, the partition control valve group 15 is connected with a water mist spray head 17 arranged in a protection area 16, a terminal circuit is further arranged in the protection area 16, the terminal circuit is respectively connected with a temperature detector 18, a smoke detector 19, a discharge indicator lamp 20, an audible and visual alarm 21 and an emergency stop button 22, the terminal circuit is connected with a fire alarm controller 23, and the fire alarm controller 23 is connected with a controller 6 of the positive displacement pump group pressure stabilizing and flow control device 1.

An energy accumulator 24 is arranged between the pressure stabilizing and flow controlling device 1 of the positive displacement pump group and the partition control valve group 15. The municipal water supply 14 is provided with a first filter 25. The municipal water supply 14 is provided with a water supply valve 26. The zone control valve group 15 is provided with a pressure sensor 27 connected with the fire alarm controller 23.

In an application scene, the areas of all protection areas are different, the required spray amount is different, the flow rate required to be output is different, the distance of each protection area is different, the pressure loss of a pipeline along the way is different, and as the water pressure of the water flow of the pump set type water mist fire extinguishing system in a distribution pipe network is higher than that of an automatic water spraying system pipe network, a high-pressure plunger type displacement water pump is generally adopted. The output flow of the displacement water pump in unit time can not be changed, so that the pump set is designed according to the maximum subarea design flow of the system, when a fire disaster occurs in the subarea with the minimum design flow, the water supply flow of the water pump set must be controlled to meet the requirement of the minimum subarea design flow, otherwise, the pressure of a pipe network of the minimum subarea is too high, a pipeline is burst, and the damage is caused to personnel. If the output flow of the pump set is less than the water consumption of the protection area, the pressure of the pipe network is reduced, and the water sprayed by the water mist spray head is reduced, so that the fire extinguishing effect is influenced. Therefore, must stabilize pump package outlet pressure in the design pressure within range, just enable the normal work of system, reach good fire extinguishing effect, adopt the utility model discloses positive displacement pump group steady voltage, accuse flow device can solve the above-mentioned problem that fire extinguishing system exists.

To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A pressure stabilizing and flow controlling device of a positive displacement pump set is characterized by comprising a water tank, a water inlet and a water outlet, wherein the water inlet is connected with the water tank, the water outlet is connected with the water inlet, a plurality of unit pump sets are connected between the water inlet and the water outlet in parallel, each unit pump set comprises a unit water pump, the unit water pumps are respectively connected with a controller, and the controller comprises a variable frequency speed control module, a start-stop module and a start-stop module; the variable-frequency speed regulation control and start-stop module is connected with one of the unit water pumps, the start-stop module is connected with the rest unit water pumps, a pressure transmitter is installed at the water outlet, and the pressure transmitter is connected with the controller.

2. The positive displacement pump assembly pressure regulating, flow controlling device of claim 1, wherein the water outlet is connected to the water tank through a safety valve.

3. The positive displacement pump group pressure stabilizing and flow controlling device according to claim 1, wherein the plurality of unit pump groups respectively comprise a pump group front end and a pump group rear end, and the unit water pump is connected between the pump group front end and the pump group rear end.

4. The positive displacement pump group pressure stabilizing and flow controlling device of claim 3, wherein the front end of the unit pump group is connected with a service valve, a filter and a flexible joint in sequence.

5. The positive displacement pump assembly pressure stabilizing and flow controlling device of claim 4, wherein the rear end of the unit pump assembly is connected with a connecting hose and a water stop valve in sequence.

6. A fire extinguishing system is characterized by comprising a municipal water supply system and a partition control valve group, wherein the municipal water supply system and the partition control valve group are connected with the pressure stabilizing and flow controlling device of a positive displacement pump group according to any one of claims 1 to 5, the partition control valve group is connected with a water mist spray nozzle arranged in a protection area, a terminal circuit is further arranged in the protection area, the terminal circuit is respectively connected with a temperature detector, a smoke detector, a spraying indicator lamp, an audible and visual alarm and an emergency stop button, the terminal circuit is connected with a fire alarm controller, and the fire alarm controller is connected with a controller of the pressure stabilizing and flow controlling device of the positive displacement pump group.

7. The fire suppression system of claim 6, wherein an accumulator is disposed between the positive displacement pump bank pressure stabilizing, flow control device and the zoned control valve bank.

8. The fire suppression system of claim 6, wherein the municipal water supply is provided with a first filter.

9. The fire suppression system of claim 6, wherein the municipal water supply is provided with a water supply valve.

10. The fire suppression system of claim 6, wherein the zone control valve block is provided with a pressure sensor connected to the fire alarm controller.