CN113719885A - Intelligent control terminal for heat supply secondary pipe network data - Google Patents
Intelligent control terminal for heat supply secondary pipe network data Download PDFInfo
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- CN113719885A CN113719885A CN202110831549.5A CN202110831549A CN113719885A CN 113719885 A CN113719885 A CN 113719885A CN 202110831549 A CN202110831549 A CN 202110831549A CN 113719885 A CN113719885 A CN 113719885A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 6
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- 230000000694 effects Effects 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000001276 controlling effect Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1048—Counting of energy consumption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The embodiment of the invention discloses an intelligent control terminal for heat supply secondary pipe network data, which comprises a unit heat metering meter and a unit remote control opening valve; a heat user heat metering meter and a heat user remote control opening valve; the intelligent balancer of the heat supply secondary pipe network corresponding to each building unit is in communication connection with each unit heat meter, the unit remote control opening valve, the heat household heat meter and the heat household remote control opening valve in the building unit; an upper computer; the intelligent balance concentrator for the heat supply secondary pipe network collects data information of a unit heat meter, a unit remote control opening valve, a heat consumer heat meter and a heat consumer remote control opening valve, receives heat supply regulation and control balance parameters sent by an upper computer, and regulates and controls the opening size of the unit remote control opening valve and/or the heat consumer remote control opening valve. The hydraulic balance performance of the secondary network of the heating system is improved, the threshold of the intelligent balance technology of the centralized heating secondary network is reduced, and the hydraulic balance work of the secondary network is promoted, so that the resource waste is prevented, and the heating quality is improved.
Description
Technical Field
The invention relates to the technical field of centralized heating, in particular to a heat supply secondary pipe network data intelligent control terminal.
Background
The problem of unbalanced hydraulic power in a heat supply secondary pipe network is a problem which needs to be faced by the heating industry for a long time, and the phenomena of large difference of heat supply quality and large difference of room temperature of residents, namely horizontal hydraulic power imbalance of building units and vertical hydraulic power imbalance among floors, are formed because the hot water supply quantity cannot be uniformly distributed due to different distances between buildings and heat exchange stations, different floors of residents and different directions of pipe networks. In order to meet the heat supply quality of users at unfavorable ends, heat supply enterprises can only increase the temperature or flow of heat supply water, so that the temperature of high-temperature users is higher, and low-temperature users are improved or even not improved a little. Therefore, not only is great waste caused, but also low-temperature users can influence the service evaluation of heat supply companies due to long-term complaints of heat supply problems.
In order to solve the problem of hydraulic imbalance, manual adjustment is performed by experience in the past, but the requirements on environment and personnel are high. In recent years, a secondary network balance system has appeared, which performs hydraulic balance by analyzing and studying uploaded device operation data and then remotely controlling valve opening adjustment by using a remote transmission unit (household) calorimeter and remote control valve devices installed on site. But often provide a single regulation algorithm and a single regulation target, either based on return water temperature, or based on flow, or based on heat distribution, etc.; due to different experiences of operation and maintenance personnel, differences of regional climate environments and differences of topological structures of district secondary pipe networks and equipment installation conditions, a single adjusting mode is difficult to meet all conditions, so that a centralized heating secondary pipe network balance system is difficult to deploy and use; meanwhile, due to the difference of the outdoor temperature of the whole day and the difference of the use habits of hot users in the whole day, the target mode of a single regulation target is difficult to further optimize and refine hydraulic balance work, and further the consumption of circulating electric energy and heat energy is saved. Meanwhile, the opening valve of the terminal is remotely controlled through an upper computer system, and the effect is often difficult to achieve due to instability and time delay of communication means.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an intelligent control terminal for the data of a heat supply secondary pipe network.
In order to achieve the purpose, the invention adopts the following technical scheme:
heat supply secondary pipe network data intelligent control terminal, its characterized in that includes:
the unit heat metering meters and the unit remote control opening valves are correspondingly arranged on each building unit in each cell;
the heat metering meters and the heat remote control opening valves of the heat rooms are installed in each building unit in a one-to-one correspondence manner;
the intelligent balancer is in communication connection with each unit heat meter, a unit remote control opening valve, a heat household heat meter and a heat household remote control opening valve in the building unit;
the upper computer is used for issuing heat supply balance parameters to the heat supply secondary pipe network intelligent balancer;
the intelligent balance concentrator of the heat supply secondary pipe network collects data information of a unit heat meter, a unit remote control opening valve, a heat consumer heat meter and a heat consumer remote control opening valve, receives heat supply regulation and control balance parameters issued by an upper computer, regulates and controls the opening size of the unit remote control opening valve and/or the heat consumer remote control opening valve.
Preferably, the intelligent balancer for the heat supply secondary pipe network further comprises a return water temperature monitor used for acquiring the return water temperature of heat supply, and the intelligent balancer for the heat supply secondary pipe network comprises a return water temperature acquisition module used for acquiring return water temperature data of the return water temperature monitor.
Preferably, the intelligent balancer for the heat supply secondary pipe network further comprises a flow collection module for collecting the flow of heat supply.
Preferably, the intelligent balancer for the heat supply secondary pipe network further comprises a power acquisition module for acquiring the heat supply power.
Preferably, the intelligent balancer for the heat supply secondary pipe network further comprises a temperature acquisition module for acquiring the indoor temperature of the heat consumer.
The invention also provides an intelligent control method for the data of the heat supply secondary pipe network, which comprises the following steps:
a horizontal dynamic balance adjusting stage for carrying out heat supply balance adjustment and control on building units in a community;
and a vertical dynamic balance adjusting stage for performing heat supply regulation and control on the heat households in the building unit in the community after the horizontal dynamic balance adjusting stage is performed.
Preferably, the horizontal dynamic balance adjustment phase comprises:
acquiring real-time index data information at a building unit node of a cell to be regulated;
acquiring 24-hour heat supply target parameter information at the node of the building unit;
and comparing the real-time index data information with the heat supply target parameter information at the same time, and performing heat supply regulation on the node of the building unit according to the comparison result.
Preferably, the vertical dynamic balance adjustment phase includes:
acquiring real-time index data information of heat user nodes in the building unit after the horizontal dynamic balance adjustment stage;
acquiring 24-hour heat supply target parameter information at the heat consumer node;
and comparing the real-time index data information with the heat supply target parameter information at the same time, and performing heat supply regulation on the heat user nodes according to the comparison result.
Preferably, the real-time index data information includes at least one of return water temperature, inlet and return water temperature difference, heat flow, heat supply power and indoor temperature of a hot house.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention provides various balancing strategies for operation and maintenance personnel to select by receiving the intelligent balancing parameters sent by the upper computer system, the operation and maintenance personnel can select various balancing modes according to the cell network topological structure, the equipment installation condition and the operation and maintenance experience, for example, one of 5 balancing strategies can be selected to work, 24-hour curve regulation target parameters and deviation adjustment parameters can be appointed, the problem that all conditions are often difficult to meet by a single adjusting mode is solved, the heat supply secondary pipe network balancing concentrator is easy to deploy and use, the comprehensive adjustment of the hydraulic balance of the secondary network is realized, and a better hydraulic balancing effect is obtained.
(2) The intelligent balance concentrator for the central heating secondary pipe network is simple and easy to use, can select an intelligent balance scheme and has a strong adaptability dynamic 24-hour curve regulation and control target, so that the use threshold of the intelligent balance system for the central heating secondary pipe network is reduced, the hydraulic balance work of the secondary pipe network is promoted, the resource waste is prevented, and the heat supply quality is improved.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a deployment topology structure of a heat supply secondary pipe network data intelligent control terminal according to this embodiment.
Fig. 2 is a flow chart of the intelligent hydraulic balance algorithm of the multi-adjustment strategy of the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a diagram of a data intelligent control terminal for a heating secondary pipe network according to an embodiment of the present invention, including:
the unit heat metering meters and the unit remote control opening valves are correspondingly arranged on each building unit in each cell;
the heat metering meters and the heat remote control opening valves of the heat rooms are installed in each building unit in a one-to-one correspondence manner;
the intelligent balancer is in communication connection with each unit heat meter, a unit remote control opening valve, a heat household heat meter and a heat household remote control opening valve in the building unit;
the upper computer is used for issuing heat supply balance parameters to the heat supply secondary pipe network intelligent balancer;
the intelligent balance concentrator of the heat supply secondary pipe network collects data information of a unit heat meter, a unit remote control opening valve, a heat consumer heat meter and a heat consumer remote control opening valve, receives heat supply regulation and control balance parameters issued by an upper computer, regulates and controls the opening size of the unit remote control opening valve and/or the heat consumer remote control opening valve.
In addition, in an embodiment, the intelligent balancer further comprises a return water temperature monitor for acquiring the return water temperature of heat supply, and the heat supply secondary pipe network intelligent balancer comprises a return water temperature acquisition module for acquiring return water temperature data of the return water temperature monitor.
In an embodiment, the intelligent balancer for the secondary heating pipe network further includes a flow collection module for collecting the flow of heating.
In an embodiment, the intelligent balancer for the heating secondary pipe network further includes a power collection module for collecting the heating power.
In an embodiment, the intelligent balancer for the secondary heating pipe network further comprises a temperature acquisition module for acquiring the indoor temperature of the heat consumer.
The embodiment also provides a heat supply secondary pipe network data intelligent control method, which specifically comprises the following steps:
a horizontal dynamic balance adjusting stage for carrying out heat supply balance adjustment and control on building units in a community;
and a vertical dynamic balance adjusting stage for performing heat supply regulation and control on the heat households in the building unit in the community after the horizontal dynamic balance adjusting stage is performed.
In one embodiment, the horizontal dynamic balance adjustment phase comprises:
acquiring real-time index data information at a building unit node of a cell to be regulated;
acquiring 24-hour heat supply target parameter information at the node of the building unit;
and comparing the real-time index data information with the heat supply target parameter information at the same time, and performing heat supply regulation on the node of the building unit according to the comparison result.
In one embodiment, the vertical dynamic balance adjustment phase comprises:
acquiring real-time index data information of heat user nodes in the building unit after the horizontal dynamic balance adjustment stage;
acquiring 24-hour heat supply target parameter information at the heat consumer node;
and comparing the real-time index data information with the heat supply target parameter information at the same time, and performing heat supply regulation on the heat user nodes according to the comparison result.
The real-time index data information may have various conditions, and in an embodiment, the real-time index data information includes at least one of a return water temperature, a return water inlet temperature difference, a return water return temperature difference, a heat flow rate, a heat supply power, and a temperature in a hot house.
The specific detailed process is as follows:
referring to fig. 1, fig. 1 is a typical deployment diagram of an intelligent control terminal for data of a heat supply secondary pipe network, in which heat users (heat supply users) in a cell a are provided with a heat metering meter and a remote control opening valve, each building unit is provided with a unit heat metering meter and a unit remote control opening valve, and these devices can transmit operation data to an intelligent balance concentrator of the heat supply secondary pipe network in a wired manner.
The upper computer system can flexibly configure balance regulation and control parameters according to the equipment installation condition and the data acquisition condition of the cell, can download the horizontal regulation balance parameters of the cell to the secondary pipe network intelligent balance concentrator when a unit remote control opening valve exists, and can download the vertical regulation balance parameters of the building unit to the secondary pipe network intelligent balance concentrator when a user remote control opening valve exists. In order to adapt to a complex balanced regulation and control use scene, an upper computer system can flexibly define the regulated nodes, time intervals and frequency. Namely, one node can flexibly define the regulation and control time period and frequency in the time dimension and download the regulation and control time period and frequency to the intelligent balance concentrator of the heat supply secondary pipe network.
And then the intelligent balance concentrator of the heat supply secondary pipe network automatically adjusts the opening of the associated opening valve through an intelligent hydraulic balance algorithm shown in figure 2 according to the balance parameters sent by the receiving upper computer and the collected equipment operation data.
During initial regulation, when a unit remote control opening valve and related operation data exist, the horizontal regulation of a cell is firstly carried out, fig. 2 shows the execution process of the regulation algorithm of the intelligent balance concentrator of the heat supply secondary pipe network, and operation and maintenance personnel can select one of 5 balance strategies according to the network topology structure, the equipment installation condition and the operation and maintenance experience of the cell, wherein the five balance strategies can be respectively: the temperature of the recovered water, the temperature difference of the recovered water, constant flow, constant heat and indoor temperature, wherein the indoor temperature strategy is only used for vertical adjustment of the building unit.
These five regulatory strategies are described in detail below:
1. and a water temperature recovery strategy is used for receiving dynamic 24-hour curve target parameters of the return water temperature of the system configuration regulation nodes in the intelligent balance concentrator equipment of the heat supply secondary pipe network, taking the collected return water temperature and the target parameters of the current hour as deviation values in the regulation time period, comparing the deviation values with a recovery water temperature deviation regulation parameter table, referring to the maximum and minimum opening parameters and other constraints of the current node to obtain the current valve regulation amplitude, and sending the current valve regulation amplitude to the current node remote control opening valve regulation opening.
2. And (3) a follow-up backwater temperature difference strategy, wherein in the intelligent balance concentrator equipment of the heat supply secondary pipe network, a dynamic 24-hour curve target parameter of the backwater inlet temperature difference of a regulation node configured by the system is received, in a regulation period, a difference value obtained by subtracting the collected backwater temperature from the collected backwater temperature is used as a deviation value with the target parameter of the current hour, the deviation value is compared with a backwater inlet temperature difference deviation adjustment parameter table, the maximum and minimum opening parameters and other constraints of the current node are referred to, the adjustment amplitude of the current valve is obtained, and the adjustment amplitude is sent to the adjustment opening of the current node remote control opening valve.
3. And a constant-current strategy, namely, receiving a dynamic 24-hour curve target parameter of instantaneous flow of a system configuration regulation node in the intelligent balance concentrator equipment of the heat supply secondary pipe network, making a deviation value of an acquired instantaneous flow value and the target parameter of the current hour in a regulation period, comparing the deviation value with an instantaneous flow deviation regulation parameter table, referring to the maximum and minimum opening parameters and other constraints of the current node, obtaining the regulation amplitude of the current valve, and sending the regulation amplitude to the remote control opening valve of the current node to regulate the opening.
4. And a constant heat strategy is used for receiving a dynamic 24-hour curve target parameter of instantaneous power of a system configuration regulation node in the intelligent balance concentrator equipment of the heat supply secondary pipe network, taking an acquired instantaneous power value and the target parameter of the current hour as a deviation value in a regulation period, comparing the deviation value with an instantaneous power deviation regulation parameter table, referring to the maximum and minimum opening parameters and other constraints of the current node, obtaining the current valve regulation amplitude, and sending the current valve regulation amplitude to the current node remote control opening valve regulation opening.
5. An indoor temperature strategy, which can only be used for vertical adjustment in a building unit, receives a dynamic 24-hour curve target parameter of indoor temperature of a system configuration regulation node in a heat supply secondary pipe network intelligent balance concentrator device, when a heat consumer does not install an indoor temperature control panel, in a regulation period, an acquired indoor temperature value and the current hour target parameter are used as deviation values, the deviation values are compared with an indoor temperature deviation adjustment parameter table, and constraints such as the maximum and minimum opening parameters of a current node are referred to obtain the adjustment amplitude of a current valve, and the adjustment amplitude is transmitted to a remote control opening valve of the current node to adjust the opening; when the indoor temperature control panel is installed in a hot house, the opening degree of the valve is regulated by the indoor temperature control panel.
After the horizontal adjustment of the residential area reaches the dynamic balance, when a user remotely controls the opening valve and related operation data, the residential area is vertically adjusted, fig. 2 shows the execution process of the adjustment algorithm of the intelligent balance concentrator of the heat supply secondary pipe network, and operation and maintenance personnel can select one of five balance strategies according to the network topology structure, the equipment installation condition and the operation and maintenance experience of the building unit, wherein the five balance strategies can be respectively as follows: temperature of recovered water, temperature difference of recovered water, constant flow, constant heat and indoor temperature. The policy logic is consistent with the level adjustment of the cell, and the specific description can be referred to above.
To sum up, this embodiment provides multiple balancing strategies for operation and maintenance personnel to select by receiving the intelligent balancing parameters issued by the upper computer system, and the operation and maintenance personnel can select one of 5 balancing strategies to work according to the cell network topology, the equipment installation condition and the operation and maintenance experience, and can specify a 24-hour curve regulation target parameter and a deviation adjustment parameter, thereby solving the problem that a single adjustment mode is often difficult to satisfy all conditions, and making the heat supply secondary pipe network balancing concentrator easy to deploy and use, thereby realizing the comprehensive adjustment of the hydraulic balance of the secondary network, and obtaining a better hydraulic balance effect.
Through this embodiment, improved heating system secondary network hydraulic balance performance, reduced central heating secondary pipe network intelligence balanced technology and used the threshold, impeld secondary network hydraulic balance work to prevent the wasting of resources, improved the heating quality.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. Heat supply secondary pipe network data intelligent control terminal, its characterized in that includes:
the unit heat metering meters and the unit remote control opening valves are correspondingly arranged on each building unit in each cell;
the heat metering meters and the heat remote control opening valves of the heat rooms are installed in each building unit in a one-to-one correspondence manner;
the intelligent heat supply secondary pipe network balancer is respectively installed in each building unit in each cell in a one-to-one correspondence mode, and the intelligent heat supply secondary pipe network balancer corresponding to each building unit is in communication connection with each unit heat meter, the unit remote control opening valve, the heat household heat meter and the heat household remote control opening valve in the building unit;
the upper computer is used for issuing heat supply balance parameters to the heat supply secondary pipe network intelligent balancer;
the intelligent balance concentrator of the heat supply secondary pipe network collects data information of a unit heat meter, a unit remote control opening valve, a heat consumer heat meter and a heat consumer remote control opening valve, receives heat supply regulation and control balance parameters issued by an upper computer, regulates and controls the opening size of the unit remote control opening valve and/or the heat consumer remote control opening valve.
2. The intelligent control terminal for the data of the heat supply secondary pipe network according to claim 1, further comprising a return water temperature monitor for acquiring the return water temperature of heat supply, wherein the intelligent balancer for the heat supply secondary pipe network comprises a return water temperature acquisition module for acquiring the return water temperature data of the return water temperature monitor.
3. The intelligent control terminal for data of the heat supply secondary pipe network according to claim 1, wherein the intelligent balancer for the heat supply secondary pipe network further comprises a flow collection module for collecting the flow of heat supply.
4. The intelligent control terminal for data of the heat supply secondary pipe network according to claim 1, wherein the intelligent balancer for the heat supply secondary pipe network further comprises a power acquisition module for acquiring the size of heat supply power.
5. The intelligent control terminal for data of the heat supply secondary pipe network according to claim 1, wherein the intelligent balancer for the heat supply secondary pipe network further comprises a temperature acquisition module for acquiring the indoor temperature of the heat consumer.
6. The intelligent control method for the data of the heat supply secondary pipe network is characterized by comprising the following steps:
a horizontal dynamic balance adjusting stage for carrying out heat supply balance adjustment and control on building units in a community;
and a vertical dynamic balance adjusting stage for performing heat supply regulation and control on the heat households in the building unit in the community after the horizontal dynamic balance adjusting stage is performed.
7. The intelligent control method for data of the heat supply secondary pipe network according to claim 6, wherein the horizontal dynamic balance adjusting stage comprises:
acquiring real-time index data information at a building unit node of a cell to be regulated;
acquiring 24-hour heat supply target parameter information at the node of the building unit;
and comparing the real-time index data information with the heat supply target parameter information at the same time, and performing heat supply regulation on the node of the building unit according to the comparison result.
8. The intelligent control method for data of the heat supply secondary pipe network according to claim 7, wherein the vertical dynamic balance adjusting stage comprises:
acquiring real-time index data information of heat user nodes in the building unit after the horizontal dynamic balance adjustment stage;
acquiring 24-hour heat supply target parameter information at the heat consumer node;
and comparing the real-time index data information with the heat supply target parameter information at the same time, and performing heat supply regulation on the heat user nodes according to the comparison result.
9. The intelligent control method for the data of the heat supply secondary pipe network according to claim 8, wherein the real-time index data information comprises at least one of return water temperature, inlet and return water temperature difference, heat flow, heat supply power and indoor temperature of a hot house.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110831549.5A CN113719885A (en) | 2021-07-22 | 2021-07-22 | Intelligent control terminal for heat supply secondary pipe network data |
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| CN202110831549.5A CN113719885A (en) | 2021-07-22 | 2021-07-22 | Intelligent control terminal for heat supply secondary pipe network data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114857657A (en) * | 2022-05-27 | 2022-08-05 | 国能宁夏供热有限公司 | Control method and device for building regulating valve |
| CN116126079A (en) * | 2023-04-18 | 2023-05-16 | 烟台绿州能源科技有限公司 | MBUS circuit with low power consumption and intelligent flow regulating terminal |
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| DE10214244A1 (en) * | 2001-03-26 | 2003-02-13 | Hg Baunach Gmbh & Co Kg | Pipe set, for fitting to a multi-path valve housing, is structured to match the positions of the housing connections and lie equidistantly at the wall |
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Application publication date: 20211130 |