The temperature control system of a heat supply of buildings

 

(57) Abstract:

The temperature controller is designed for automatic control of the temperature of the mixed (reverse) of water in the district heating systems of buildings. The technical result of the invention is to provide a simple, reliable and more affordable to the consumer regulator (Elevator). The temperature controller includes a housing with an inlet channel for supplying fluid from the forward and reverse lines of the heating system, the outlet in the form of a diffuser, located coaxially with the nozzle and throttle needle, bellows for the throttle needle and gauge thermosysteme. New technical solution is that the regulator is provided with a control channel and a valve associated with the outlet pressure of thermal system, and installed in the housing guide sleeve for accommodating therein with clearance of the throttle needle, provided with at least one longitudinal profiled groove. The needle is rigidly connected with the movable end of the bellows is placed in the hollow chamber, and a spring-loaded, and inside the throttle needle made channel that tells the inlet valve of a straight line with a hollow chamber, and the internal cavity of the bellows through the C control channel, blocked by control valve, is connected with the inner cavity of the channel inlet return water. The temperature controller is characterized by simple construction, has a low weight and performance and increased reliability. 1 Il.

The invention relates to the field of automatic control and can be used in district heating systems.

Known temperature controllers for heating systems in buildings (elevators) with bellows throttle needle, providing its axial movement and change in performance of the Elevator, see, e.g., auth. St. USSR N 1441366, CL G 05 D, 23/02, selected as a prototype.

Know another device for controlling the flow of fluid, e.g., auth. St. N 1439547, CL G 05 D 23/00, with other method of changing the coolant flow rate. This device may be similar.

The disadvantage of the prototype is that the amount of movement of the throttle needle is proportional to the amount of filler in the inner cavity of the bellows. This principle of construction regulator requires a long stroke of the bellows filled with a heat sensitive liquid that when the temperature reverse the Torah.

In addition, the issue of protection of the bellows during overloads, when the needle will make its full stroke, block the saddle, and under the influence of any reason the temperature of the return fluid continues to increase. In this case, the heat-sensitive liquid within the bellows increases its volume, closes the bellows and incapacitate the entire Elevator.

The technical result of the invention is to provide a simple, reliable and more affordable Elevator.

The technical result is achieved in that the temperature control system of a heat supply of buildings in the form of an Elevator, comprising a housing with an inlet channel for supplying fluid from the supply and return pipe of the heating system, the outlet in the form of a diffuser, located coaxially with the nozzle and throttle needle, and bellows for the throttle needle and gauge thermosysteme, provided with a control channel and control valve associated with the outlet gauge system and installed in the housing guide sleeve for accommodating therein with clearance of the throttle needle, provided with at least one longitudinal profiled groove, spring and rigidly connected with podvijnymi of a straight line with a hollow chamber, moreover, the internal cavity of the bellows through the gap between the throttle needle and a guide sleeve connected to the input channel of a straight line, and via the control channel, blocked by control valve, is connected with the input channel of the return line.

The figure presents a diagram of the proposed temperature controller heating buildings. It consists of a body 1 with an inlet 2 and 3 for supplying a coolant, respectively, of the forward and backward line of the outlet pipe 4 in the form of a diffuser, nozzle 5 and the throttle needle 6. The throttle needle, in turn, consists of a bellows 7, placed in the dead of the camera 8, which is rigidly connected with the rolling face with a butterfly needle, and the return spring 9. In case there is a guide sleeve 10 for placement in gap 11 of the throttle needle, provided with at least one longitudinal profiled groove 12. In the throttle needle 6 are channel 13, indicating the input channel 2 of a straight line with the chamber 8 and through the groove (or grooves) 12 input channel 2 is in communication with the internal cavity 14 of the bellows 7.

The regulator is equipped with a control channel 15 and control valve 16 associated with the output pressure of thermal system. Through the return line. The actuator control valve 16 is carried out directly from the gauge of thermal system, which, in turn, from bulbs 17 and 18, the knob 19 and node 20 permutations of the control valve 16.

Working temperature controller as follows.

Hot water from a straight line heat through the channel 2 enters the chamber 21 of the regulator and then through the nozzle 5 is supplied to a mixing chamber 22 and then through the outlet 4 into the heating system.

Under the action of ejecting the ability of the jet emerging from the nozzle 5, the mixing chamber 22 creates a zone of reduced pressure, allowing water from the reverse channel 3 sucked into the zone of suction and enjoys jet of hot water coming from the nozzle 5, the outlet 4 of the regulator, while mingling with her and lowering the temperature of the coolant at the output of the controller.

The temperature of the mixed water is proportional to the amount of direct heat carrier flowing into the mixing chamber through the nozzle 5. The amount of fluid that passes through the nozzle 5, in turn, is determined by the position of the throttling needle 6 with respect to the input section of the nozzle.

The pressure of the coolant guide sleeve 10 into the internal cavity 14 of the bellows 7. When closed, the control valve 16, the differential pressure on the bellows 7 is missing, because the inside of the bellows and on its outer surface will be the pressure is the same as in the chamber 21.

Under the influence of return spring 9, the needle 6 is fully opens the flow area of the nozzle 5.

When you open (normally closed) control valve 16, the working fluid from the internal cavity 14 of the bellows 7 through a control channel 15 enters the channel 3, in which pressure is less than the channel 2. The pressure of the working fluid inside the bellows 7 will decrease due to the throttling of the fluid flow gap 11.

Under the influence of the prevailing pressure difference on the bellows 7, the latter is compressed, moving the throttling needle 6 and reducing the flow area of the nozzle 5.

As previously noted, the outer surface of the throttle needle 6 is made of at least one longitudinal profile groove 12, the cross-sectional area which increases along its length. When fully open flow cross-section of the throttle nozzle needle 6 is in the initial position and the bellows 7 in the free state. This groove 12 on the needle 6 is located in the gap 11 to its smaller cross-section, and at a maximum during the needle and the negative feedback on the throttle needle 6 depending on the opening of the control valve 16.

A specific opening of the control valve 16 corresponds to a certain throttle needle 6. If under any circumstances the throttle, the needle will move to a higher level, it will increase the area of the orifice groove, the total resistance of the gap 11 will decrease, leakage of the working fluid in the internal cavity 14 of the bellows exceeds its discharge from the internal cavity of the bellows via the control valve 16 in channel 3 return water. The pressure inside the bellows will increase the differential pressure on the outer and inner surface of bellows decreases, the return spring 9 moves the throttle needle opening.

If under any circumstances the throttle, the needle will move to a smaller value, the hydraulic resistance of the gap 11 will be increased, draining the working fluid from the internal cavity 14 of the bellows exceeds the flow through the gap 11. The pressure inside the bellows will be reduced, the bellows will move the throttle needle closure, equating the cost of the working fluid through the gap 11 and the control valve 16.

Thus, the bellows and the throttle needle is constantly "listening" for the position of the control valve.

The operating expenses of the LM is odasi working through the nozzle 5 of the regulator. The management of such small expenses allows the use of low control actuator, for example, miniature custom gauge thermosysteme. The main bulb 17 of thermal system, depending on the destination, may be embedded in the output line of the controller or in the input channel 3 return water.

The setting of thermal system to maintain the set temperature determined by the graph of heat release, is the node configuration-unit 19.

In the proposed controller, the main bulb 17 is placed in the outlet port of the regulator and monitors the temperature change of the coolant at the outlet of the regulator. When the temperature of the coolant heat-sensitive liquid contained in the bulb 17, increasing its volume, opens the flow area of the control valve 16, which leads to cover the needle orifice of the nozzle 6.

The bulb 18 is installed outside the heated building and reacts to changes in the outdoor temperature. Lowering the temperature of the outside air automatically opens the flow area of the nozzle 6 and increases the temperature of the coolant at the output of the controller.

For lowering the temperature the e and holidays unit 19 can be used as a manual throttle needle 6, allows you to change the temperature of the coolant at the outlet of the regulator by a certain amount.

To automate this process unit 19 can also be provided with a software device.

Thus, the proposed controller allows you to automatically maintain the set temperature in heating systems with correction for ambient temperature, creating a comfortable temperature in the living space and prevents them from overheating, and also allows additional heat saving in administrative and production premises at the expense of lowering the temperature outside.

Technical characteristics of the proposed controller does not yield a series of electronic regulators, such as electronics P-1M, but much easier and more reliable, which makes the regulator more cheap and available to consumers.

The temperature control system of a heat supply of buildings in the form of an Elevator, comprising a housing with an inlet channel for supplying fluid from the forward and reverse lines of the heating system, the outlet in the form of a diffuser, located coaxially with the nozzle and throttle needle, and the bellows is cash and the controlling valve, associated with the output pressure of thermal system, and installed in the housing guide sleeve for accommodating therein with clearance of the throttle needle, equipped with not less than one longitudinal profiled groove, spring and rigidly connected to a movable end of the bellows is placed in the hollow chamber and the inside of the throttle needle made channel, indicating the input channel of a straight line with a hollow chamber, and the internal cavity of the bellows through the gap between the throttle needle and a guide sleeve connected to the input channel of a straight line, and via the control channel, blocked by control valve, is connected with the input channel of the coolant from the return line.

 

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