KR100755392B1 - A membrane valve with regulation means - Google Patents

Abstract

The present invention is a thin film valve (1) for maintaining a differential pressure of a liquid flow at a constant level in a heating or cooling system or in a similar system having a heat carrier medium, which is connected to a first chamber (5). It has an inlet region 3 and an outlet region 4, the first chamber 5 has a first means 7 and a thin film 8, the flow rate of which is controlled at one side of the thin film 8. The thin film valve 1 is related. The control of the flow rate is carried out in a second chamber 6 arranged on one side of the thin film 8, and a passage 9 is provided between the second chamber 6 and the inlet region 3, which passage is provided. In (9), adjusting means 2 are arranged for controlling the flow rate of the medium into and out of the second chamber 6. This makes it possible to adjust the speed at which the membrane valve compensates for the pressure change in the circulation system which includes the valve as a part, so that no pipe or valve rupture occurs in the circulation system.

Membrane Valves, Membrane, Compression Springs, Throttle Valves

Description

Membrane valve with regulation means

1 shows a throttle valve for mounting in a membrane valve according to the invention.

Fig. 2 is a diagram showing a thin film valve according to a first embodiment of the present invention, equipped with a throttle valve.

3 is a view showing a thin film valve according to a second embodiment of the present invention.

4 shows a pressure diagram for a membrane valve according to the invention.

Explanation of symbols on the main parts of the drawings

1: thin film valve 2: throttle valve 3: inlet area

4: exit area 5: first chamber 6: second chamber

7: compression spring 8: thin film 9: hydraulic passage

10: spindle 12: slot 13: o-ring

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14: Housing 16: Motorized Thermostat

17: screw device 18: adjusting insert

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The present invention is a membrane valve for maintaining a constant level of differential pressure of a liquid flow in a heating or cooling system or a similar system having a heat carrier medium, the membrane valve having an inlet region and an outlet region connected to a first chamber. The first chamber has a first means and a thin film, and relates to a thin film valve whose flow rate is controlled on one side of the thin film.

For example, in WO 94/21949, a spindle having an inlet and an outlet area, the outlet area comprising a valve cone cooperating with a seating disposed within said inlet and outlet area ( Thin film valves for heating or cooling systems are known, in which a spindle is connected.

The spindle is partly surrounded by a compression spring supported by an axially displaceable stop member and partly surrounded by a thin film which passes the spindle through the thin film disc to the opposite direction of spring movement. Move it. The spindle extends through the membrane and is manually adjustable in this area so that the spindle can take different positions relative to the stop member.

This thin film is loosely supported by the thin film disc and the spindle, thereby making it possible to lift the thin film out of the thin film disc and to slide and rotate the thin film along the end of the spindle through its central hole.

At the free end of the spindle, there is provided a hole used for receiving a tool introduced from the outside. Thus, through the tool, the spindle is adjusted so that the stop member can occupy a high position or a low position by adjusting the spring pressure accordingly. Thus, the membrane reacts to high or low spring pressures, resulting in a change in the regulation of the valve cone, and thus a change in the flow rate and differential pressure level through the seat.

The desired differential pressure level is done by control valves in the supply and return pipes of the heating or cooling system, and if it is desired to change this level, the spindle is adjusted by manual adjustment.

Thus, the valve itself cannot compensate for a possible change in the differential pressure level, and if the speed at which manual compensation is made does not fit the entire hydraulic system and the inherent dynamics of the valve, a strong increase in the dynamics of the entire system is caused, and as a result In addition, rupture of pipes or valves in the installation may occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a thin film valve capable of compensating for a pressure change in a circulation system including some of the thin film valves, without having the aforementioned disadvantages.

This object is a thin film valve for maintaining a constant level of differential pressure of a liquid flow in a heating or cooling system or a similar system having a heat carrier medium, the thin film valve having an inlet region and an outlet region connected to a first chamber, In the thin film valve having the first chamber and the first means and the thin film, the flow rate is controlled on one side of the thin film, the control of the flow rate is performed in a second chamber disposed on one side of the thin film, A passage is provided between the second chamber and the inlet region, and in the passage, an adjusting means is arranged for controlling the flow rate of the medium to and from the second chamber. Achieved by a valve.

This membrane valve is characterized in that, when the membrane valve is inserted into the circulation system, the flow rate of the medium between the inlet region and the outlet region is regulated by means of regulating means, for example in the form of a throttle valve, It functions to control the speed. Thus, the inherent dynamics of the membrane valve are adapted to the overall hydraulic system, thereby not causing a sharp increase in the dynamics of the overall system. As a result, no rupture of pipes or the like occurs in the system. When a pressure change occurs in the circulation system, the throttle valve is correspondingly adjusted so that the speed of the membrane displacement and thus the dynamic characteristics of the membrane valve and the pressure present in the circulation system are always appropriate. Optimum speed is obtained that is unique to a particular system.

During operation of the system in which the membrane valve is inserted, an instantaneous increase in pressure may occur, thereby resulting in a risk of pipe rupture. By adjustment by the adjusting means such that the flow of liquid occurs through the passage, the membrane occupies a given desired position. As a result of pressure equilibrium occurring before and after the membrane, the risk of pipe rupture is eliminated. However, the adjusting means, also called the throttle valve, is not adjusted when the plant is first operated.

In the thin film valve according to the present invention, the adjusting means has a spindle and a guide thread, and the passage is constituted by a hole provided through the structure of the thin film valve, whereby the flow rate through the passage is caused by displacement of the spindle. Adjustments can be made and adjustments can be made from outside according to a given system. In addition, the passage may be provided in the initial configuration of the membrane valve, so that the cost associated with the extension of the membrane valve can be minimized.

In the thin film valve according to the present invention, the second chamber is disposed between the inlet region and the outlet region, and is defined by a thin film displaceable to provide a variable volume to the second chamber, wherein the first means consists of a compression spring. As a result, a compact and simplified valve is obtained, and an optimum structure is achieved. In addition, the displacement of the membrane valve is performed only by the first means when the system is operated.

In the thin film valve according to the present invention, slots are provided in the first chamber, and the slots are formed parallel to the direction of action of the first means with respect to the thin film, whereby a thin film having a variable displacement penetrates the medium. By blocking some of the flow, the membrane valve may take different positions, for example, a fully closed position, a fully open position, or other positions to create conditions that provide an optimum through flow of media.

Moreover, it is not necessary to disassemble a known thin film valve, and it is sufficient to remove or mount a single part of the thin film valve. Therefore, disadvantages and costs incurred due to the switching of the thin film valve can be minimized.

The invention also includes the use of the membrane valve for zone temperature control of a heating or cooling system.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 shows an adjustment means in the form of a throttle valve 2 with a spindle 10 for mounting on a membrane valve 1 according to the invention.

The spindle 10 has two ends, that is, a first end 10 ′ and a second end 10 ″, and an extension of the second end 10 ″, a guide thread configured as a slotted screw (11) is provided. The second end 10 ″ and the guide thread 11 of the spindle 10 are partially enclosed by the housing 14 and through the manipulation of the guide thread 11 with a standard tool (not shown), the spindle 10 may be axially adjusted with respect to the housing 14, whereby the first end 10 ′ is partially surrounded by the housing 14. The adjustment is partially closed of the entire system. In part and in part during the operation of the entire system.

In order to prevent external leakage, a seal in the form of an O-ring 13 is provided around the second end 10 ".

2 and 3 show the membrane valve according to the invention, with the throttle valve 2 shown in FIG. 1 mounted.

The membrane valve 1 has an inlet region 3 and an outlet region 4, which are opposed to the inlet region 3 but are not located in the extension of the inlet region 3. Between the inlet region 3 and the outlet region 4, a first chamber 5 and a second chamber 6 are provided, with the second chamber 6 located below the first chamber 5. A membrane 8 is provided between these first chambers 5 and the second chambers 6. The thin film 8 can be displaced in the vertical direction by the first means 7 in the form of a compression spring, whereby the volume of the second chamber 6 can be changed.

According to known principles, a screw device 17 is provided which extends on the extension of the second chamber 6 and above the limits 15 of the inlet region 3 and the outlet region 4. The screw device 17 has a motor driven thermostat 16 for the setting of the membrane valve 1, whereby the temperature required to be generated or dissipated by the entire system is determined to the requirements. Can be selected accordingly.

As described above, the first chamber 5 is provided with a first means 7 consisting of a compression spring, one end of the first means 7 being the upper wall of the first chamber 5 ( 5 ′), the other end of the first means 7 is supported by the membrane 8. The compression spring 7 exerts a force on the thin film 8 by its vertical displacement, thereby reducing the area of the second chamber 6 to a greater or lesser extent.

An adjusting insert 18 is arranged around the first chamber 5, and slots 12 are provided adjacent to the adjusting insert 18. These slots 12 are formed axially parallel to the direction of action of the compression spring 7 with respect to the thin film 8, and these slots 12 are fixed uniformly throughout the first chamber 5. In this way, the compression spring 7 can be displaced vertically with respect to the slots 12. These slots 12 are not shown in FIG.

Between the bottom portion of the inlet region 3 and the second chamber 6, a hydraulic passage 9 in the form of a hole penetrating the structure 22 of the membrane valve 1 is provided. The purpose of the passage is to provide a through-flow of the medium from the inlet region 3 to the second chamber 6. The hydraulic passage 9 consists of three parts, namely a first part 19, a second part 20 and a third part 21. In FIG. 2, the first portion 19 is oriented towards the second chamber 6 and is acute with respect to the substantially horizontal lower portion 3 ′ of the inlet region 3. The second portion 20 extends from the first portion 19 and is disposed parallel to the first chamber 5 or the second chamber 6, and the second end 20 ′ of the second portion 20 is arranged. ) Is disposed above the throttle valve 2. The throttle valve 2 is arranged axially parallel to the inlet region 3 and comprises a slotted screw 11 and a spindle 10. The third portion 21 of the hydraulic passage 9 is arranged axially on the extension of the first end 10 ′ of the spindle 10. It is possible to directly access the second chamber 6 from the third part 21.

In FIG. 3, the first part 19 of the hydraulic passage 9 is perpendicular to the bottom of the second chamber 6 and substantially perpendicular to the horizontal lower part 3 ′ of the inlet region 3. Is oriented. The second part 20 of the hydraulic passage 9 extends from the vertical first part 19 and is arranged substantially parallel to the inlet area 3, and the third part 21 is arranged in the second part ( It extends directly from 20 and is arranged parallel to the first part 19. It is possible to directly access the second chamber 6 from this third part 21. The throttle valve 2 is mounted in connection with the first portion 19 of the hydraulic passage 9.

The throttle valve 2 as an adjusting means can take three states, namely a fully open state, a partially open state and a fully closed state. When the throttle valve 2 is in the fully open state, the medium flows through the inlet region 3 to the membrane valve 1 via a pipe (not shown) and partially into the slotted screw 11. And is partially split to flow around the adjustable insert 18. That is, the flow continues, in part, through the slots 12 and continues radially from the first chamber 5 to the outlet region 4, and in part the slotted screw 11 of the throttle valve 2. It flows into the 2nd chamber 6 under the thin film 8 via via. Thus, by the displacement of the membrane 8, the resistance that the membrane valve 1 provides for the through flow of the medium is adjusted. This displacement is determined by the compression spring 7 and the balance between the hydraulic forces on the lower and upper sides of the membrane 8 and the opposing forces resulting from the pressure providing area of the membrane. Hydraulic pressure in front of the thin film valve 1 leading to the second chamber 6 under the thin film 8 via the hydraulic passage 9 and hydraulic pressure in the first chamber 5 above the thin film 8. Is a pressure difference dP between the membrane valve 1 and the hydraulic pressure in front of the first chamber 5) and the force P together with the pressure providing area A of the membrane 8. Thus, the following equation is established.
dP × A = P
This force P is equal to the force generated by the compression of the compression spring 7.

Thus, the change in the hydraulic pressure in front of the membrane valve 1, ie in the first chamber 5, initiates displacement of the membrane 8 until the balance of force between the hydraulic pressures and the compression spring is reestablished. Let's do it. The rate at which this change in displacement, ie the change in the suppression volume of the second chamber 6 under the thin film 8, is such that the medium passes through the hydraulic passage 9 to the second chamber 6 or It depends on how fast it can flow from the second chamber 6. Therefore, in the fully open state of the throttle valve 2, only the known effect is achieved. That is, the membrane valve 1 maintains a controlled through flow of the medium.

After passing through the first chamber 5, the medium flows to the outlet region 4 and from there into the discharge pipe (not shown).

In the fully closed state of the throttle valve 2, the through flow of the medium to the second chamber 6 is closed, whereby the dynamic movement of the thin film 8 is stopped. In this state, the thin film valve 1 becomes a static control valve.

In the partially open state of the throttle valve 2, that is, the slotted screw 11, which is the adjusting means in the throttle valve 2, is adjusted in the axial direction so that one end 10 ′ of the spindle 10 is adjusted to the second. When allowing a predetermined through flow of the medium into the chamber 6, the volume of the second chamber 6 can be adjusted by the variable displacement of the membrane 8. Thus, the flow rate of the medium to or from the second chamber 6 is regulated such that the dynamic properties of the membrane valve 1 are suitable for a particular circulation system comprising part of the membrane valve 1. Can be. When the motor driven thermostat 16 is activated, the compression spring 7 takes different positions, the thin film 8 also takes different positions, and the second chamber 6 has different volumes.

4 shows a pressure diagram for the membrane valve 1 according to the invention, including the pressure indication for each of the inlet region 3, the outlet region 4, the first chamber 5 and the second chamber 6. Indicates.

For example, in a state where the throttle valve 2 is set correctly so that the dynamic characteristics of the membrane valve 1 are suitable for a specific circulation system including the membrane valve 1 as a part, the pressure P1 in the inlet region 3 Is approximately equal to the pressure P3 in the outlet region 4.

When a temperature rise is required and the motor-driven thermostat 16 compresses the compression spring 7, the volume of the second chamber 6 is reduced and the speed at which the medium flows into the second chamber 6 is increased , Pressure P1 increases. Correspondingly, since the volume of the first chamber 5 is reduced, the pressure P2 also increases. Therefore, the speed at which the medium flows into the outlet region 4 increases, and the pressure P3 increases in response to the change in the pressure P1. Thus, in some situations, pressure equilibrium is achieved between the inlet region 3 and the outlet region 4.

If a low temperature is required, the volume of the second chamber 6 is increased, the speed at which the medium flows into the second chamber 6 is reduced, and the pressure P1 drops. Correspondingly, since the volume of the first chamber 5 is increased, the pressure P2 is also reduced. Likewise, the speed at which the medium flows into the outlet region 4 is reduced, and the pressure P3 increases in response to the change in the pressure P1. Thus, when the throttle valve 2 is set correctly, the pressure is balanced in the thin film 8. This eliminates the risk of rupture of the pipe or valve in the circulation system.

As described above, according to the present invention, a thin film valve capable of compensating for a pressure change in a circulation system is provided.

When the membrane valve is inserted into the circulation system, the flow rate of the medium between the inlet region and the outlet region is regulated, for example, by means of adjustment in the form of a throttle valve, so that the rate of membrane displacement relative to the circulation system is controlled. Thus, the inherent dynamics of the membrane valve are adapted to the overall hydraulic system, thereby not causing a sharp increase in the dynamics of the overall system. As a result, no rupture of pipes or the like occurs in the system. When a pressure change occurs in the circulation system, the throttle valve is correspondingly adjusted so that the speed of the membrane displacement and thus the dynamic characteristics of the membrane valve and the pressure present in the circulation system are always appropriate. Optimum speed is obtained that is unique to a particular system.

During operation of the system in which the membrane valve is inserted, an instantaneous increase in pressure may occur, thereby resulting in a risk of pipe rupture. By adjustment by the adjusting means such that the flow of liquid occurs through the passage, the membrane occupies a given desired position. As a result of pressure equilibrium occurring before and after the membrane, the risk of pipe rupture is eliminated.

In the thin film valve according to the present invention, the adjusting means has a spindle and a guide thread, and the passage is constituted by a hole provided through the structure of the thin film valve, whereby the flow rate through the passage is caused by displacement of the spindle. Adjustments can be made and adjustments can be made from outside according to a given system. In addition, the passage may be provided in the initial configuration of the membrane valve, so that the cost associated with the extension of the membrane valve can be minimized.

In the thin film valve according to the present invention, the second chamber is disposed between the inlet region and the outlet region, and is defined by a thin film displaceable to provide a variable volume to the second chamber, wherein the first means consists of a compression spring. As a result, a small, simplified valve is obtained, and an optimum structure is achieved.

Moreover, it is not necessary to disassemble a known thin film valve, and it is sufficient to remove or mount a single part of the thin film valve. Therefore, disadvantages and costs incurred due to the switching of the thin film valve can be minimized.

Claims (7)

A thin film valve (1) for maintaining a differential pressure of a liquid flow at a constant level in a heating or cooling system or in a similar system having a heat carrier medium, the thin film valve (1) having an inlet area (3) connected to the first chamber (5). And a thin film valve having an outlet region (4), wherein the first chamber (5) has a compression spring (7) and a thin film (8), the flow rate of which is controlled at one side of the thin film (8). In 1), Control of the flow rate is carried out in a second chamber 6 arranged on one side of the thin film 8, and a passage 9 is provided between the second chamber 6 and the inlet region 3. And a adjusting means (2) in the passage (9) for controlling the flow rate of the medium into and from the second chamber (6). Membrane valve according to claim 1, characterized in that said adjusting means (2) comprise a spindle (10) and a guide thread. The thin film valve according to claim 1, wherein the passage (9) consists of a hole provided through the structure (22) of the thin film valve (1). 2. The thin film (8) according to claim 1, wherein the second chamber (6) is disposed between the inlet region (3) and the outlet region (4) and is displaceable to provide a variable volume to the second chamber (6). The thin film valve characterized by the above-mentioned. delete 2. The slot according to claim 1, wherein slots 12 are provided in the first chamber 5, the slots 12 being parallel to the direction of action of the compression spring 7 on the membrane 8. Thin film valve. The membrane valve of claim 1, wherein the membrane valve is used for zone temperature control of a heating or cooling system.

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