CN214092210U - Multi-connection variable load negative pressure generation system - Google Patents
Multi-connection variable load negative pressure generation system Download PDFInfo
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- CN214092210U CN214092210U CN202022781180.5U CN202022781180U CN214092210U CN 214092210 U CN214092210 U CN 214092210U CN 202022781180 U CN202022781180 U CN 202022781180U CN 214092210 U CN214092210 U CN 214092210U
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Abstract
The utility model relates to the field of processing and manufacturing of industrial negative pressure systems, and discloses a multi-connected variable load negative pressure generating system, which comprises a negative pressure container, at least two negative pressure pumping devices and at least two negative pressure load devices; the inside of the negative pressure container is negative pressure relative to the outside; one end of the negative pressure pumping device is respectively connected with the negative pressure container; one end of the negative pressure load device is connected to a confluence point and then connected to the negative pressure container. The utility model has the advantages of, solved in negative pressure load device's use, insert in real time, break off new negative pressure load device and lead to the undulant problem of pressure among the negative pressure load device of other normal uses, have higher using value.
Description
Technical Field
The utility model relates to a manufacturing field of industrial negative pressure system, in particular to multi-connected variable load negative pressure generating system.
Background
In industry, negative pressure is often used, for example, a negative pressure system can be used to keep the interior of a workshop at a certain negative pressure, so that some harmful gases generated in the workshop can be removed. The existing negative pressure system usually adopts a negative pressure pumping device, such as a Roots blower and the like, to realize negative pressure, and the negative pressure pumping device is directly connected with a negative pressure load device to provide rated negative pressure for the negative pressure load device (103). However, the negative pressure suction device needs to be stopped continuously due to the need for maintenance of the negative pressure load device, or a plurality of negative pressure load devices need to be arranged in parallel at the same time, so that the cost is difficult to accept by arranging a plurality of negative pressure suction devices in one-to-one correspondence. Therefore, it is necessary to develop a system that can connect a new negative pressure load device in real time during the use process and can well keep the pressure in the rest negative pressure load devices stable.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art can only set up the shortcoming of taking out negative pressure device, negative pressure load device one to one, provide a changeable load negative pressure generation system that ally oneself with more and a method of use thereof.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
a multi-connected variable load negative pressure generating system comprises a negative pressure container (101), at least two negative pressure pumping devices (102) and at least two negative pressure load devices (103); the inside of the negative pressure container (101) presents negative pressure relative to the outside; one end of the negative pressure pumping device (102) is respectively connected with the negative pressure container (101); one end of the negative pressure loading device (103) is connected to a junction point (104) and then connected to the negative pressure container (101);
the device also comprises a control valve (105) arranged between the negative pressure container (101) and the negative pressure pumping device (102) and a connecting device (106) arranged at one end of the negative pressure loading device (103) connected with the negative pressure container (101);
wherein the control valve (105) is used for controlling the communication or disconnection between the negative pressure container (101) and the negative pressure pumping device (102);
the connecting device (106) is used for connecting the negative pressure loading device (103) to the junction point (104).
Further, as an alternative, in the embodiment of the present application, a linear adjusting pipe (107) is disposed between the negative pressure pumping device (102) and the negative pressure container (101).
Further, as an alternative, in the embodiment of the present application, the linear adjusting pipe (107) is disposed between the control valve (105) and the negative pressure pumping device (102).
Further, as an optional solution, in the embodiment of the present application, the method includes the following steps:
pre-shutdown step: when the negative pressure in the negative pressure container (101) is F0, one negative pressure pumping device (102) is closed, and the rest negative pressure pumping devices (102) are adjusted until the negative pressure in the negative pressure container (101) adjusted by the negative pressure pumping device (102) is restored to the value F0 before adjustment;
an access step: a new negative pressure loading device (103) is connected to the confluence point (104), and a negative pressure pumping device (102) is started at the same time;
and (3) a recovery step: after the closed negative pressure suction device (102) is opened, the remaining negative pressure suction devices (102) are adjusted until the negative pressure in the negative pressure container (101) returns to the value F0 before adjustment.
Further, as an optional solution, in the embodiment of the present application, the method further includes:
in the accessing step: and advancing the time for opening the negative pressure pumping device (102) to the time before a new negative pressure load device (103) is accessed to the confluence point (104) in the accessing step after the negative pressure pumping device (102) is closed in the pre-shutdown step.
Further, as an optional scheme, in the embodiment of the application, in the recovering step, the time for starting the adjustment of the rest of the negative pressure pumping devices (102) is delayed.
The utility model discloses the following technological effect that is showing has:
the real-time access and output of a plurality of negative pressure load devices can be realized, and the negative pressure load devices in the working state are kept in the access or disconnection process, wherein the pressure fluctuation is not more than 10 percent of the total pressure. The real-time access can be realized by only 2 negative pressure pumping devices at least.
Drawings
Fig. 1 is a simplified schematic diagram of a multiple variable load negative pressure generating system.
Fig. 2 is a flow diagram of a method of using a multiple variable load negative pressure generating system.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The embodiment provides a multi-connection variable load negative pressure generating system, as shown in fig. 1, which is used for installing a new online negative pressure load device on line while maintaining the continuous use of the existing negative pressure load device when the number of the negative pressure load devices needs to be changed, and specifically comprises a negative pressure container (101), at least two negative pressure pumping devices (102) and at least two negative pressure load devices (103); the inside of the negative pressure container (101) presents negative pressure relative to the outside; one end of the negative pressure pumping device (102) is respectively connected with the negative pressure container (101); one end of the negative pressure loading device (103) is connected to a junction point (104) and then connected to the negative pressure container (101); the negative pressure container (101) is a rigid container with a certain vacuum and negative pressure inside, and the material and the structural strength of the container are required to meet the existence and maintenance of the negative pressure generally, and can meet the sufficient strength and the firmness within a certain negative pressure variation range. The negative pressure container (101) should have a considerable volume, and the volume of the negative pressure container should not be less than the sum of the volumes of all the pipelines, namely the volume of the pipeline between the negative pressure pumping device (102) and the negative pressure loading device (103), minus the volume of the negative pressure container.
The negative pressure pumping device (102) can adopt an existing device, the function of the device is to enable negative pressure to appear in the negative pressure container and a pipeline of the negative pressure container, and the magnitude of the negative pressure can be configured according to the capacity, the power and the actual need of the negative pressure pumping device (102). In addition, the plurality of negative pressure extraction devices (102) described in the present application and embodiments should be of substantially the same type, power level and negative pressure extraction capability, and generally employ the same machine. The negative pressure loading device (103) is a machine which is usually involved and needs external negative pressure to realize a working state, and the machine can use an existing device or a newly-appeared device. In the application and the embodiment, the plurality of negative pressure loading devices (103) can have the same external negative pressure requirement or can be different. If the external negative pressures required by the negative pressure load devices (103) are different, two working states exist, firstly, part of the negative pressure load devices (103) need to work under the unmatched external negative pressure condition, which may cause that the negative pressure load devices (103) cannot work under the optimal working state, but the unmatched external negative pressure condition should not cause the negative pressure load devices (103) to enter an unsafe state, otherwise, the negative pressure load devices (103) cannot be used. Secondly, a throttling device or a similar device which can realize the throttling function of the system in the embodiment can be arranged in a pipeline of the connecting merging point (104) of the negative pressure loading device (103), and the throttling device and the similar device can use the existing device. After the throttling devices are installed, the partial negative pressure loading device (103) can work under more proper negative pressure. The confluence point refers to a pipeline communicated with all negative pressure loading devices (103), and the confluence point in actual use is often a section of pipeline because a certain distance exists between the negative pressure loading devices (103). In this embodiment, the negative pressure container (101) is usually one, but two or more negative pressure containers (101) may be used in communication, and in this case, the effect is substantially the same as that of one negative pressure container (101). The number of the negative pressure load devices (103) is uncertain, the system in the embodiment is mainly used for changing the number of the actually used negative pressure load devices (103) in the using process, other negative pressure load devices (103) can be kept in use all the time, and the working negative pressure can be maintained within a relatively smooth change range.
The device also comprises a control valve (105) arranged between the negative pressure container (101) and the negative pressure pumping device (102) and a connecting device (106) arranged at one end of the negative pressure loading device (103) connected with the negative pressure container (101); the control valve (105) is used for cutting off or communicating the communication between the corresponding negative pressure pumping device (102) and the negative pressure container (101). The control valve (105) can be an existing valve or a device with similar effect. The connecting device (106) is a flange or the like which can connect a new negative pressure loading device (103) to the intake point (104), and the connecting device (106) further comprises a valve or the like which is arranged in the pipeline and can cut off the negative pressure. Furthermore, if the work load of one or more of the negative pressure load devices (103) changes, the pressure on the negative pressure load device (103) can be appropriately changed by the connecting device (106) or by adding an additional throttle valve, so that energy can be saved well, and when the change of the work pressure on the negative pressure load device (103) can still be reduced by the following steps, the pressure of other normally working negative pressure load devices (103) is maintained stable, in the process, the step of connecting a new negative pressure load device (103) in the following connecting step needs to be replaced by the step of adjusting the work pressure of a specific negative pressure load device (103), and the adjusting step can be completed by the connecting valve or the throttle valve.
The above-described piping for connecting the negative pressure container (101), the negative pressure suction device (102), the negative pressure load device (103), the control valve (105), and the connection device (106) is a rigid piping having a sufficient strength which is generally used.
Further, in order to improve the reaction rate of the system, reduce the pressure fluctuation caused by adding a new negative pressure loading device (103) to the rest of the normally used negative pressure loading devices and reduce the pressure fluctuation as much as possible, in the application, although the existence of the negative pressure container (101) leads the new negative pressure reviving device added in the system to reduce the pressure fluctuation, through the use, the relation between the volume of the negative pressure container (101) and the volume of the whole pipeline is further limited, and the pressure fluctuation acting on the negative pressure loading device (103) can be further reduced.
In the present embodiment, the volume of the negative pressure container (101)
Wherein Vp is the volume of the pipeline except the negative pressure container (101), Mj is the inner cross-sectional area of the pipeline in the state that a throttle valve arranged in the pipeline is normally opened, and the inner cross-sectional area can be usedThe control valve (105) is used for replacing the inner side sectional area in a normally open state, Mg is the inner side sectional area of the pipeline, and oc is a constant with the value range of 1.1-1.2.
Wherein the control valve (105) is used for controlling the communication or disconnection between the negative pressure container (101) and the negative pressure pumping device (102); the connecting device (106) is used for connecting the negative pressure loading device (103) to the junction point (104).
Further, as an alternative scheme, a linear adjusting pipeline (107) is arranged between the negative pressure pumping device (102) and the negative pressure container (101). The linear adjusting pipeline (107) is a pipeline with a certain length, the length of the pipeline is not longer than the distance between the negative pressure container (101) and the nearest negative pressure loading device (103), and the pipeline is a straight pipeline, and no bend is arranged between the pipeline and the negative pressure loading device.
Further, as an alternative, the linear adjusting pipeline (107) is arranged between the control valve (105) and the negative pressure pumping device (102).
Example 2
The method according to the system described in embodiment 1 above, as shown in fig. 2, includes the following steps:
pre-shutdown step: when the negative pressure in the negative pressure container (101) is F0, one negative pressure pumping device (102) is closed, and the rest negative pressure pumping devices (102) are adjusted until the negative pressure in the negative pressure container (101) adjusted by the negative pressure pumping device (102) is restored to the value F0 before adjustment;
an access step: connecting a new negative pressure loading device (103) to the joining point (104), wherein the connecting device (106) corresponding to the new negative pressure loading device (103) should be closed, and the negative pressure pumping device (102) with the closed pre-shutdown step is restarted;
and (3) a recovery step: after the negative pressure pumping device (102) is started, the rest negative pressure pumping devices (102) are adjusted until the negative pressure in the negative pressure container (101) is restored to the magnitude F0 before adjustment.
Further, the time interval from closing one negative pressure suction device (102) in the pre-shutdown step to switching in a new negative pressure load device (103) in the switching-in step is represented as T1, the time interval from switching in the new negative pressure load device (103) to re-opening the closed negative pressure suction device (102) is represented as T2, the time from switching in the new negative pressure load device (103) to adjusting the other negative pressure suction devices (102) is represented as T3, T1 is not more than T3-T2, if T1 is overtime, the pressure fluctuation experienced by the negative pressure load device (103) is large, in order to reduce the time for switching in the new negative pressure load device (103), the connection device (106) can be closed in advance and the negative pressure load device (103) can be switched in advance, and in the switching-in step, the connection device (106) only needs to be opened.
Further, as an optional scheme, the method further includes:
in the accessing step: after the negative pressure pumping device (102) is closed in the pre-shutdown step, and before a new negative pressure load device (103) is connected to the junction point (104) in the connection step, it should be noted that, at this time, since the new negative pressure load device (103) is connected, the connection device (106) corresponding to the newly connected negative pressure load device (103) should be closed. The scheme is a simplified scheme, the time required by the whole step is further shortened, and the pressure fluctuation of the negative pressure load device (103) can be kept below 10% of the total pressure, so that the technical effect is better.
Further, as an alternative, in the recovering step, the time T4 for starting adjustment of the rest of the negative pressure suction devices (102) is delayed, T4 is less than or equal to T2+ T3, if T4 is overtime, the load borne by the reopened negative pressure suction device (102) is too large, and when the number of the negative pressure load devices is more than 3, the pressure fluctuation measured in the negative pressure load device (103) easily exceeds 30% of the total pressure.
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.
Claims (3)
1. A multi-connected variable load negative pressure generating system is characterized by comprising a negative pressure container (101), at least two negative pressure pumping devices (102) and at least two negative pressure load devices (103); the inside of the negative pressure container (101) presents negative pressure relative to the outside; one end of the negative pressure pumping device (102) is respectively connected with the negative pressure container (101); one end of the negative pressure loading device (103) is connected to a junction point (104) and then connected to the negative pressure container (101);
the device also comprises a control valve (105) arranged between the negative pressure container (101) and the negative pressure pumping device (102) and a connecting device (106) arranged at one end of the negative pressure loading device (103) connected with the negative pressure container (101);
wherein the control valve (105) is used for controlling the communication or disconnection between the negative pressure container (101) and the negative pressure pumping device (102);
the connecting device (106) is used for connecting the negative pressure loading device (103) to the junction point (104).
2. A multiple variable load negative pressure generating system as claimed in claim 1, wherein a linear adjusting pipe (107) is provided between the negative pressure pumping device (102) and the negative pressure container (101).
3. A multiple variable load negative pressure generating system as claimed in claim 2, wherein the linear adjusting pipe (107) is disposed between the control valve (105) and the negative pressure pumping device (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022781180.5U CN214092210U (en) | 2020-11-25 | 2020-11-25 | Multi-connection variable load negative pressure generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022781180.5U CN214092210U (en) | 2020-11-25 | 2020-11-25 | Multi-connection variable load negative pressure generation system |
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| CN214092210U true CN214092210U (en) | 2021-08-31 |
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| CN202022781180.5U Active CN214092210U (en) | 2020-11-25 | 2020-11-25 | Multi-connection variable load negative pressure generation system |
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