RU214224U1 - Shut-off and balancing valve - Google Patents

Abstract

The utility model relates to valve assembly for hydraulic systems. SUBSTANCE: lock-balancing valve contains a tubular body, having an inlet and an outlet, made with elements for connecting pipelines to them, the body is made with a tubular branch pipe extending from it at an angle to the axis of the flow in the direction from the inlet to the outlet, used to install it made with the possibility of moving along the branch pipe of the blocking unit of the passage section of the body in the form of a shutter made with a seat and equipped with a handle with a mechanism for moving this unit. An inclined partition is made in the body, dividing the body cavity into an inlet zone and an outlet zone and made with a hole having a seat for placing the saddle of the overlap assembly. The mechanism for moving the shutter includes a monolithic rod element located inside the tubular branch pipe and having elements for fixing the handle on it at one end, and at the other end - a screw thread on the outer surface, with which a counter screw thread is connected to the inner wall of the saddle enclosing the rod element . In the upper part, from the side of the handle attachment, the rod element is made with an annular shoulder pressed towards the handle by a spring against the sealing seal. 2 ill.

Description

The utility model relates to valve building units for hydraulic systems and is designed to regulate and control the flow of the hydraulic medium (or coolant and coolant) through a valve in a heating and cooling system. And also to control and measure the amount of the working medium (liquid) passing through the valve (valve) using a differential pressure gauge (a device for measuring the pressure drop across the valve).

A balancing valve or balancing valve is a device or type of plumbing fixture designed to regulate the cross section to pass a liquid of a given flow rate. Flow rate is the amount of working medium (liquid) passing through the valve per unit of time. The flow varies depending on the section between the saddle and the valve, which corresponds to a specific pressure drop across the valve (before and after the valve), using a device (differential pressure gauge). This pressure difference is measured and converted by the device or using formulas into the fluid flow on the valve, that is, into the actual amount of fluid passing through the valve per unit time. In other words, the balancing valve is designed to regulate the amount of liquid passing to the consumer (source).

Fluid flow control is provided by increasing or decreasing the cross section through the valve. Thus, this section creates a specific (given) hydraulic resistance corresponding to the position (graduation) on the valve handle, and if the section is reduced, then the hydraulic resistance will increase. And if the cross section is increased, then the hydraulic resistance will decrease. With a decrease in the passable section, the flow rate drops.

Balancing valves are used to control the flow of cold and heat carriers in hot water, heating, ventilation, cooling and air conditioning systems with an accuracy of ± 5-10%. Balancing valves are equipped with a flow meter or fittings, to which it is possible to connect any differential pressure gauge (device) from various manufacturers for measurement. The balancing valve can perform the following functions: balancing, presetting, closing, measuring and draining, and also has a separate hole for connecting a temperature sensor, which is especially important for accounting for thermal energy.

For example, the well-known balancing valve TA STAD 52 151-014 with drainage is equipped with a special handle that has two scales and the ability to fix the valve settings. This allows the valve to be adjusted and balanced with great accuracy and, when the valve is closed, the valve setting is maintained (does not go astray). With this handle, the valve can be closed completely, no re-adjustment is required after opening. The presence of a drain device on the balancing valve is very convenient, since it is not necessary to install additional drain valves on the riser.

Thus, such a shut-off and balancing valve is known, designed to regulate and control the flow in the heating and cooling system, containing a tubular body having an inlet and outlet made with elements for connecting pipelines to them, the body is made with outgoing from it at an angle to the axis of the flow in the direction from the inlet to the outlet with a tubular branch pipe used to install in it a node for overlapping the flow section of the body in the form of a shutter made with the possibility of moving along the branch pipe in the direction from the inlet to the outlet, made with a saddle and equipped with a handle with a mechanism for moving this node, the body is made an inclined partition dividing the housing cavity into an inlet zone and an output zone and made with a hole having a seat for placing the saddle of the overlap assembly in the output zone with complete blocking of the body flow section, and the body is made with two pipes located on the side of the tubular pipe in the area of the inlet zone two tons ribbed elbows in the form of blind holes, the longitudinal axes of which are inclined to the axis of the flow in the direction from the inlet to the outlet at an angle opposite to the angle at which the longitudinal axis of the tubular branch pipe is located, the cavity of one of the elbows in the bottom zone is connected by a channel with the cavity of the tubular the cavity of the other elbow in the bottom zone is connected by a channel with the cavity of the body in the inlet zone, in these tubular elbows there are nipples for connecting pressure control devices in the inlet and outlet zones, while the valve is equipped with a drainage outlet connected with a cavity of the inlet zone, and the drainage outlet is made in the form of a branch pipe located on the body in the area from the entrance to the inclined partition inside the body and on the side of the body opposite to the placement of the tubular pipe and the tubular shape of the knees, while the body is also made with an additional tubular shape of the elbow with internal thread located on the side drainage outlet in the area from the inclined partition inside the housing to the exit (RU 158563, F16K 1/10, F24D 19/10, publ. 01/10/2016).

This decision is accepted as a prototype for the declared object.

The shut-off and balancing valve (Fig. 1) contains a tubular body 1, having an inlet 2 and an outlet 3, made with elements for connecting pipelines to them. The housing is made with a tubular branch pipe 4 extending from it at an angle to the axis of the flow in the direction from the inlet to the outlet, used to install in it a passage section of the body in the direction from the inlet to the outlet, which can be moved along the branch pipe of the overlap assembly 5. The tubular branch pipe 4 is made with an internal thread for screwing in the overlap assembly. This block 5 is made in the form of a shutter made with a seat 6 and equipped with a handle 7 with a mechanism 8 for moving this node (this mechanism is made in the form of a sleeve connected to the seat and to the handle). In the body 1, an inclined partition 9 is made, dividing the cavity of the body into an inlet zone and an outlet zone and made with a hole having a seat for placing a saddle 6 of the overlap assembly 5 in the outlet zone with a complete overlap of the body flow section.

Also in the movement mechanism 8 there is a built-in unit for adjusting the position of the handle in the selected mode of overlapping the flow section in the body. This assembly includes a limiter 10 and an insert 11 located in the cavity of the bushing.

The disadvantage of this solution is that in the intermediate modes of partial blocking of the flow section in the body (the position between the “fully open” position and the “fully closed” position), water seeps through the cavity of the control sleeve of the seat movement mechanism (in which the limiter and the insert of the assembly are located). adjustment and balancing) towards the handle. With a partial opening of the flow section, the cavity behind the seat is filled with water and penetrates through the screw connection into the cavity of the control sleeve of the seat movement mechanism, which is sealed from leaks only from the side of its connection with the valve body. The screw thread section is not sealed, and it is a channel for fluid seepage towards the valve handle. The seat is connected to the control sleeve of the screw connection, which is not a precision connection and is made in a loose fit. In a loose fit, the seat contacts and moves along the wall of the pipe. And according to Pascal's law, the pressure in a closed system is the same in all directions. In this regard, through the gaps, water under the pressure of the system in the pipeline penetrates into the cavity of the control sleeve and appears on the handle in the form of leakage traces. The appearance of leaks in any faucet of any type is considered a defect and requires the elimination of a malfunction of the faucet. But in relation to the prototype, the leak is not a defect indicating a malfunction of the crane. Therefore, such leaks are false and can mislead the maintenance service.

This utility model is aimed at achieving a technical result, which consists in increasing operational reliability by eliminating leaks through the valve handle, falsely indicating a defect in the shut-off and balancing valve itself.

The specified technical result is achieved by the fact that in the shut-off and balancing valve designed to regulate and control the flow in the heating and cooling system, containing a tubular body having an inlet and outlet made with elements for connecting pipelines to them, the body is made with a an angle to the axis of the flow in the direction from the inlet to the outlet with a tubular pipe used to install in it a blocking unit for blocking the flow section of the body in the form of a valve made with a seat and equipped with a handle with a mechanism for moving this node, while in the body an inclined partition is made dividing the body cavity into an inlet zone and an outlet zone and is made with a hole having a seat for accommodating the saddle of the overlap assembly, the mechanism for moving the shutter includes a monolithic rod element located inside the tubular pipe and having an element at one end screws for fastening the handle on it, and at the other end - a screw thread on the outer surface, with which a counter screw thread is connected on the inner wall of the saddle enclosing the rod element, while in the upper part, from the side of the handle attachment, the rod element is made with an annular shoulder pressed to the side handle spring to the seal.

In this case, the housing can be made with two tubular elbows located on the side of the tubular pipe in the area of the inlet zone, in the form of blind holes, the longitudinal axes of which are inclined to the axis of the flow in the direction from the inlet to the outlet at an angle opposite to the angle at which the longitudinal axis of the tubular branch pipe is located, the cavity of one of the elbows in the bottom zone is connected by a channel with the cavity of the tubular branch pipe in the seat stroke section, and the cavity of the other elbow in the bottom zone is connected by a channel with the body cavity in the inlet zone,

And in these tubular elbows there are nipples for connecting pressure control devices in the inlet zone and in the outlet zone.

In addition, the valve is equipped with a drainage outlet connected with the cavity of the inlet zone and which is made in the form of a branch pipe located on the body in the area from the inlet to the inclined partition inside the body and on the side of the body opposite to the placement of the tubular pipe and the tubular shape of the knees, while the body is made with an additional tubular elbow with an internal thread located on the side of the drainage outlet in the area from the inclined baffle inside the housing to the outlet.

These features according to the independent claim of the utility model are essential and are interconnected with the formation of a stable set of essential features sufficient to obtain the required technical result.

This utility model is illustrated by a specific example of execution, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result.

In FIG. 1 shows a longitudinal section of the shut-off and balancing valve according to the prototype;

fig. 2 shows a longitudinal section of a shut-off and balancing valve according to the utility model.

According to this utility model, the design of a shut-off and balancing valve is considered, which is used to control the flow of cold and heat carriers in hot water, heating, ventilation, refrigeration and air conditioning systems. This valve or gate is designed to regulate the cross section for the passage of a liquid / gas of a given flow rate.

The shut-off and balancing valve (Fig. 2) is built into the pipeline system to regulate and control the flow in the system, for example, heating and cooling, it contains a tubular body 1, having an inlet 2 and an outlet 3, made with elements for connecting pipelines to them (elements connections are made in the form of an internal thread of the inlet and outlet parts of the body and are made on their outer surface with edges for a wrench). The housing is made with a tubular branch pipe 4 extending from it at an angle to the axis of the flow in the direction from the inlet to the outlet, used to install in it a cover of the passage section of the body that can be moved along the branch pipe 5 in the direction from the inlet to the outlet. Tubular pipe 4 is made with an internal thread for screwing node 5 overlap. This node 5 of the overlap is made in the form of a shutter made with a seat 6 and equipped with a handle 7 associated with the mechanism 8 for moving this node.

In the body 1, an inclined partition 9 is made, dividing the cavity of the body into an inlet zone and an outlet zone and made with a hole having a seat for placing a saddle 6 of the overlap assembly 5 in the outlet zone with a complete overlap of the body flow section.

The body 1 is made with two tubular elbows 12 and 13 located on the side of the tubular pipe 4 in the area of the inlet zone in the form of holes, the longitudinal axes of which are inclined to the axis of the flow in the direction from the inlet to the outlet at an angle opposite to the angle at which the longitudinal axis of the tubular pipe 4 is located. Both elbows are interconnected by a thin partition (to impart positional rigidity). Both knees are made with an internal thread to accommodate a check valve in each of them, made in the form of a nipple 14 for connecting pressure control devices in the inlet and outlet zones. The cavity of one knee 13 is in communication with the cavity of the tubular pipe 5 in the area of the seat 6, and the cavity of the other knee 12 is in communication with the body cavity in the inlet zone 2. Nipples 13 are placed in these tubular elbows.

In the housing, the drainage outlet is made in the form of a branch pipe 15, located on the housing in the area from the inlet to the inclined partition inside the housing and on the side of the housing opposite to the placement of the tubular branch pipe and the tubular shape of the elbows. This branch pipe 15 is made with an external thread for connecting a drain fitting (pipeline) or installing a plug (for the case when drainage is not required). Placement of the drain pipe on the opposite side from the location of the tubular pipe and elbows allows you to form a full-fledged drainage of liquid in the volume of its inlet. At the same time, access to this nozzle is released, which allows the use of a standard wrench.

The housing is also made with an additional tubular elbow 16 with an internal thread, located on the side of the drainage outlet in the area from the inclined partition inside the housing to outlet 3. This outlet can be used for various purposes: from connecting control devices to connecting a drain outlet from the exit zone .

In the utility model under consideration, important qualities of the prototype are preserved: placement on the same side of the body of two elbows with nipples inside for connecting pressure control devices in the inlet and outlet areas and a tubular pipe used to screw an adjustable gate into it, blocking the flow area in the hull. Thus, in the control and adjustment mode, all important and necessary nodes are in front of the operator. Control nodes can be pressure gauges with a short pipeline with a needle at the end. When inserting the needle into the nipple, the operator must hold the pressure gauge and the needle inserted into the nipple, but at the same time be able to control the shutter (be able to turn the handle on the shutter to equalize the pressures in the inlet and outlet zones). Thus, the placement of the regulation and control units on one side of the body makes it possible to conveniently carry out the corresponding operations with these units. And the placement of the tubular drain pipe on the other side of the body allows you to freely connect the drain pipe using a conventional wrench or a Swedish key. When screwing the connecting fitting onto the tubular socket, the operator can freely operate the tool, since nothing prevents the key from turning in a wide angle range. The same free action can be carried out when using a tool for connecting a pipeline or a measuring device to an additional elbow 16 with an internal thread.

A feature of the claimed utility model is that the mechanism 8 for moving the shutter includes a monolithic rod element placed inside the tubular pipe 4 and having at one end the elements for fixing the handle 7 on it, and at the other end a screw thread on the outer surface with which it is connected reciprocal screw thread on the inner wall of the saddle covering the rod element, while in the upper part from the side of the handle attachment, the rod element is made with an annular shoulder 17, pressed towards the handle by the spring 18 to the sealing seal 19.

Water filling the cavity in the gate area with a partially open passage of the inclined partition 9 in the body, under pressure, enters the inter-turn gaps of the threaded connection of the seat with the rod and enters the area of the tubular pipe 4 to the annular shoulder. Since the annular shoulder is pressed against the sealing element by a spring, no further water seepage occurs.

Elimination of leaks towards the handle became possible due to the exclusion of the handle position adjustment unit in the selected mode of blocking the flow section in the body and the transfer of this function to the handle. This made it possible to exclude the presence of a bushing with a cavity inside, replacing it with a full-fledged monolithic rod element. At the same time, the claimed device has become simpler and more reliable in operation.

It should be understood that fine adjustment of the parameters of the water flow passing through the manual control balancing valve is possible only if two conditions are met: laminar water flow at a constant speed and the invariability of the water supply pressure in the stream. In this case, it becomes possible to accurately partially close the flow section of the valve and set the required outlet pressure in relation to the inlet pressure. And fix it through the handle position adjustment unit in the selected shut-off mode so that when the valve is opened again, it will immediately return to the required outlet flow parameters. This design feature is only good when there is the same constant and unchanging flow pressure at the inlet during the entire service life.

But, in reality, water flows through any pipeline under varying pressure and at varying speeds. At the same time, in some sections, the flow acquires turbulence, which slows down the flow and changes the pressure pattern along the thickness of the flow. This pressure depends on the operation of the transfer pump, on the presence of local resistances in the pipeline (knocks, flow splitters, etc.), the condition of the internal surfaces of pipelines, ambient temperature, etc. As a result, the pressure at the inlet to the valve always differs from the average set for this type of piping and the hydraulic piping system as a whole. Therefore, when the valve is reopened, in most cases it is not possible to obtain the same ratio of inlet and outlet flows as it was before the valve was closed. Therefore, the node for fine adjustment of the position of the handle loses its meaning in application.

This utility model is industrially applicable, as it is based on the optimization of the layout solution for the rational arrangement of nozzles and elbows on a common body, which eliminates damage to the elbows with the nipple and the shutter. Ease of installation is increased and the time for these operations is reduced due to the transfer of the drainage outlet to the side of the body opposite to the location of the valve and nipples movement unit. The design of the valve is simplified by eliminating the leak-producing assembly for adjusting the position of the handle in the selected mode of blocking the flow section in the housing.

Claims (4)

1. A shut-off and balancing valve designed to regulate and control the flow in the heating and cooling system, containing a tubular body having an inlet and outlet made with elements for connecting pipelines to them, the body is made with outgoing from it at an angle to the axis of the flow in in the direction from the inlet to the outlet with a tubular branch pipe used to install in it a node for overlapping the passage section of the body in the form of a valve made with a seat and equipped with a handle with a mechanism for moving this node, which is made with the possibility of moving along the pipe, while the body has an inclined partition dividing the cavity of the housing to the inlet and outlet areas and is made with a hole having a seat for accommodating the saddle of the overlap assembly, characterized in that the mechanism for moving the shutter includes a monolithic rod element located inside the tubular branch pipe and having at one end elements for fixing the handle on it , and at the other end - a screw thread on the outer surface, with which a reciprocal screw thread is connected to the inner wall of the saddle enclosing the rod element, while in the upper part, from the side of the handle attachment, the rod element is made with an annular collar, pressed towards the handle by a spring to the sealing seal . 2. The valve according to claim 1, characterized in that the body is made with two tubular knees in the form of blind holes located on the side of the tubular pipe in the area of the inlet zone, the longitudinal axes of which are inclined to the axis of the flow in the direction from the inlet to the outlet under at an angle opposite to the angle at which the longitudinal axis of the tubular branch pipe is located, the cavity of one of the elbows in the bottom zone is connected by a channel with the cavity of the tubular branch pipe in the seat stroke section, and the cavity of the other elbow in the bottom zone is connected by a channel with the housing cavity in the inlet zone. 3. The valve according to claim. 1, characterized in that nipples are placed in these tubular elbows for connecting pressure control devices in the inlet and outlet zones. 4. The valve according to claim. 1, characterized in that the valve is equipped with a drainage outlet communicated with the cavity of the inlet zone and which is made in the form of a pipe placed on the body in the area from the inlet to the inclined partition inside the body and on the side of the body opposite to the placement of the tubular pipe and tubular elbows, while the housing is made with an additional tubular elbow with internal thread, located on the side of the drainage outlet in the area from the inclined partition inside the housing to the outlet.

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