Device for closing a fluid container

Abstract

Currently known are quick-closing valves to which pressure gauges and control valves are screwed on the fluid outlet side. However, this represents an additional interface, which can simultaneously become a potential leak point. Furthermore, such a design requires additional user intervention, during which errors can occur. Against this background, the present invention provides for the integration of a pressure gauge into a valve housing, which offers the significant advantage that, in addition to eliminating potential leak points and resulting in a considerably more compact and cost-effective design, it also enables an accurate pressure reading relative to the container connected to the device.

Description

[0001] The present invention relates to a device for closing a fluid container with a valve housing which has a fluid line with a fluid inlet and a fluid outlet, wherein the fluid line is shut off by means of a shut-off valve.

[0002] Such a device is already known from WO 2016 / 184454 A1. This describes a quick-closing valve for fluid lines that enables rapid and reliable shut-off in the event of fluid leakage. The valve comprises a housing with inlet and outlet, a fluid-tight bushing, and a longitudinally displaceable valve stem with a sealing element. The valve stem is pre-tensioned by a closing spring held by a clamping device in the form of a toggle joint. A manually operated clamping element allows the closing spring to be pre-tensioned, while an electromagnetic latch holds the clamping device in position. Upon activation or power failure, the latch is released, the toggle joint bends, and the valve stem closes the fluid line. This design offers a compact and lightweight solution that requires manual reset to prevent automatic re-tensioning.

[0003] In the field of fluid vessel closure systems, it is common to employ various valve mechanisms to control fluid flow. Well-known systems typically include a combination of inlet and outlet valves that can regulate and shut off the fluid flow. These valves are often manually or automatically operated and are found in a wide variety of applications, including industrial processes, water treatment plants, and hydraulic systems. In many of these systems, monitoring the fluid pressure is crucial for safe and efficient control. Pressure gauges are therefore frequently installed near the valves to display the applied pressure and allow for adjustments as needed.

[0004] In conventional systems, pressure gauges are often mounted externally on the fluid lines, which can lead to increased installation effort and potential leak points. These external installations require additional piping and seals, which not only increase costs but also complicate maintenance. Furthermore, positioning the pressure gauges outside the valve body can cause delays in pressure measurement, potentially impacting the system's response time.

[0005] Another problem with existing systems is the limitation of the fluid outlet velocity. In many applications, it is necessary to control the outlet velocity to prevent damage to downstream components or to meet specific process requirements. Known solutions use separate control valves that can be adjusted manually or automatically.

[0006] Against this background, the present invention aims to create a device for closing a fluid container which avoids leaks as far as possible, can be manufactured as cost-effectively as possible and provides a design that is as error-free as possible.

[0007] This problem is solved by a device for closing a fluid container according to the features of independent claim 1. Further useful embodiments of such a device can be found in the subsequent dependent claims.

[0008] The device provided is for sealing a fluid container and includes a valve housing. This valve housing serves as the central component and contains the necessary mechanisms for controlling the fluid flow. The connection between the valve housing and the other components is achieved through precisely manufactured interfaces that ensure a secure and leak-proof connection.

[0009] The valve body features a fluid line equipped with a fluid inlet and a fluid outlet. This fluid line enables the controlled flow of fluid through the valve body. Communication between the fluid inlet and the fluid outlet is facilitated by the fluid line, which acts as a channel and directs the fluid flow in the desired direction.

[0010] The fluid line is shut off using a check valve. The check valve is integrated within the valve body and can interrupt or allow the flow of fluid through the fluid line. The connection between the fluid line and the check valve is designed so that the check valve can completely stop the flow of fluid when necessary, ensuring safe and controlled handling of the fluid.

[0011] According to the invention, a pressure gauge, i.e., a manometer, is integrated into the valve housing in the fluid line between the fluid inlet and the shut-off valve. This pressure gauge serves to display the fluid pressure at the fluid inlet. The connection between the fluid line and the pressure gauge is made via a special opening or fitting that transmits the fluid pressure to the pressure gauge. This allows the current fluid pressure to be precisely measured and displayed even when the shut-off valve is closed, providing important information for monitoring and controlling the fluid flow.

[0012] Integrating the pressure gauge within the valve body ensures that the pressure can be measured even if the shut-off valve is triggered. This also minimizes space requirements and eliminates interfaces between components that could be sources of leakage. Positioning the pressure gauge upstream of the shut-off valve ensures continuous pressure monitoring in the inlet area, allowing for early detection of pressure drops or spikes. This helps identify potential system problems early and implement appropriate measures to optimize operation and prevent damage. Furthermore, this method allows for monitoring the fill level of the connected tank, which would not be possible with a pressure monitoring system installed after the fact, as is typically the case.

[0013] According to a first embodiment, a measuring branch can be associated with the valve housing, connecting to the fluid line between the fluid inlet and the shut-off valve. The measuring branch enables precise measurement of the fluid pressure by establishing a connection between the fluid line and an external pressure gauge. This arrangement ensures that the pressure gauge provides accurate and consistent pressure readings, as it is directly connected to the fluid line. The measuring branch acts as an interface, transmitting the pressure of the fluid in the line to the pressure gauge, optionally with the insertion of a filter to prevent contamination of the pressure gauge. This allows for continuous pressure monitoring, which is particularly important for ensuring the proper operation of the device and for detecting potential problems at an early stage.A fluid-tight connecting pipe for attaching the pressure gauge to the valve body is attached to the measuring branch. This fluid-tight connection ensures that no fluid escapes from the system. The fluid-tight connection also prevents external influences such as dirt or moisture from entering the system and distorting the measurements.

[0014] In a preferred embodiment, a control valve for limiting the fluid outlet velocity can be integrated into the fluid line between the shut-off valve and the fluid outlet. This embodiment enhances the functionality of the device for closing a fluid container by providing additional control over the fluid flow. The control valve, integrated into the fluid line, serves to regulate the velocity of the fluid exiting the fluid outlet. This is achieved by mechanically or electronically adjusting the control valve, which controls the flow rate and thus the velocity of the fluid by changing the cross-sectional area of ​​the line. This can be accomplished by various technical means, such as a rotatable disc, a slide valve, or a needle valve, all of which can be actuated mechanically or electronically.

[0015] Integrating the control valve offers several advantages. First, it allows for more precise control of the fluid flow, which is particularly important in applications where the outlet velocity is critical, such as in medical devices or industrial processes requiring a consistent fluid output. Second, the control valve can help minimize pressure fluctuations in the system by regulating the velocity of the exiting fluid, thus maintaining a more stable operating condition. Third, the control valve provides an additional layer of safety by offering the ability to limit or stop the fluid flow in the event of a fault or malfunction of the shut-off valve. This can be especially important in safety-critical applications where an uncontrolled fluid flow could lead to hazardous situations.

[0016] A further improvement can be achieved by using a rotary actuator to adjust the control valve between a position that blocks the fluid outlet and a position that opens it. This configuration allows for precise control of the fluid flow through the valve body, as the rotary actuator is mechanically linked to the control valve and changes its position through a rotational movement. The rotary actuator can be, for example, a handwheel, lever, or other rotatable control element, allowing for direct and intuitive operation by the user. The mechanical coupling between the rotary actuator and the control valve ensures reliable and repeatable valve adjustment, which is particularly advantageous in applications requiring precise regulation of the fluid flow.

[0017] The ability to continuously adjust the control valve significantly expands the functionality of the device, as it allows for fine-tuning of the fluid flow. This is particularly useful in situations where the fluid pressure or flow rate varies and precise adjustment is necessary to ensure optimal operating conditions.

[0018] Specifically, the control valve can advantageously comprise two opposing ball valves. This particular design of the control valve offers several technical advantages and improvements. A ball valve is characterized by its simple and robust construction, which enables reliable sealing and easy control of fluid flow. By moving a first valve ball from or into a first valve seat with a through-hole, the fluid flow can be precisely controlled or completely shut off. This type of valve is particularly advantageous in applications where a fast and reliable shut-off of the fluid flow is required.By using a working diaphragm in a rotary actuator's working chamber, a vacuum build-up in this chamber—that is, between the fluid outlet and the first valve seat—causes the diaphragm to be deflected. A valve pin is connected to this diaphragm, for example, via a connecting disc. The deflection of the working diaphragm allows the connecting disc, with the attached valve pin, to be moved towards the first valve ball, forcing it out of the valve seat and opening the fluid flow. This results in vacuum control.

[0019] The second ball valve, which operates in the opposite direction, ensures that if a minimum residual pressure is not reached in a container connected to the device, a residual pressure remains to ensure that no humidity can penetrate and corrode the container.

[0020] According to another embodiment, the device for closing a fluid container can be further improved by the specific design of the shut-off valve, in which the shut-off valve is designed as a quick-closing valve that can be mechanically pre-tensioned by means of a clamping lever and manually or automatically triggered by means of an electromagnet. This design offers several advantages and new features. The clamping lever allows for mechanical pre-tensioning of the valve, meaning that the valve can be held in an open position until a release mechanism is activated. This provides a reliable yet quick-release closure option for the fluid line, since the mechanical clamping lever represents a physical barrier that holds the valve in its position. The electromagnet allows for flexible release of the valve, either by a signal or by a power failure of the electromagnet.By integrating an electromagnet, the valve can be triggered either manually by a user or automatically by a control system, and, as part of a safety solution, automatically in the event of a fault. The integration of a quick-closing valve ensures that the valve can be closed in the shortest possible time, which can be crucial in critical situations.

[0021] Specifically, the fluid line can be designed to form a valve seat in a valve branch, creating a specific structure within the fluid line that serves as the basis for interaction with a shut-off element. This design allows the shut-off element to be precisely positioned and guided to ensure an effective seal. A shut-off element can be engaged by a fluid-tight bushing in such a way that the fluid outlet can be separated from the fluid inlet by the shut-off element. This fluid-tight bushing ensures that no leakage occurs around the shut-off element when it engages in the fluid line to interrupt the fluid flow.

[0022] Furthermore, the locking element can be pre-tensioned against the spring force of a closing spring in a free position, whereby the spring force of the closing spring can be released by means of the trigger to move the locking element into a locked position that closes the shut-off valve. The pre-tension against the spring force ensures that the locking element is held in a stable position until the shut-off valve is released. This pre-tension is crucial for the reliable function of the locking element, as it prevents the locking element from returning to the locked position uncontrollably and, in fact, accelerates its engagement into the locked position. The spring force of the closing spring can be released by means of the trigger. The trigger acts as a control mechanism that releases the spring force of the closing spring and thus sets the locking element in motion.This release of spring force is a critical point, as it provides the energy required to move the locking element into the locked position.

[0023] In a further development, the trigger can be a toggle joint for releasing the closing spring. This toggle joint, acting as a mechanical connecting element, ensures a stable connection between the trigger and the closing spring as long as the electromagnet holds back a designated locking spindle, preventing the pawl from disengaging. When the trigger is activated, the toggle joint releases the closing spring, extending the locking element, such as a valve stem, until it contacts the valve seat, effectively closing the fluid line. Using a toggle joint reduces the mechanical stress on the components involved because the forces are distributed evenly, thus improving the device's durability and reliability.

[0024] The invention described above will be explained in more detail below using an exemplary embodiment.

[0025] They show Figure 1 shows a quick-closing valve according to the prior art, in a perspective view from an oblique angle above; Figure 2 shows a variant of the quick-closing valve according to Figure 1 with the housing open in a perspective view from an oblique angle, Figure 3, in the prior art to a quick-closing valve according to one of the Figure 1 or 2 Retrofittable element with a pressure gauge and a rotary control, in a perspective view from an oblique angle, Figure 4; a device according to the invention with a quick-closing valve and a pressure gauge integrated into the valve housing as well as a rotary control, in a perspective view from an oblique angle, Figure 5; the device according to Figure 4 in a front view, as well as Figure 6, the device according to Figure 5 in the cross-section shown there.

[0026] Figure 1Figure 1 shows a prior art device for closing a fluid container (not shown here or in the following), for example, a gas cylinder, which includes a valve housing 2. The valve housing 2 has a fluid line connected to a fluid inlet 4 and a fluid outlet 5. The fluid line is designed to be closed off by means of a shut-off valve. The shut-off valve is a quick-closing valve that can be mechanically pre-tensioned by means of a clamping lever and manually or automatically triggered by means of an electromagnet. The fluid line forms a valve seat in a valve branch, into which a locking element can be engaged by means of a fluid-tight bushing in such a way that the fluid outlet 5 can be separated from the fluid inlet 4 by the locking element 8. The locking element 8 can be pre-tensioned against the spring force of a closing spring 23 in a free-opening position.The spring force of the closing spring 23 can be released by means of a release mechanism 21 to move the locking element 8 into a locked position that closes the shut-off valve. The release mechanism 21 actuates an electromagnet, which in turn actuates a tensioning spindle 19 that holds a pawl 18, which ultimately secures a toggle joint 17 pre-tensioned by the closing spring 23.

[0027] Figure 2 shows a variant of device 1 according to the prior art as in Figure 1 The housing is shown open here, so that the function of the quick-closing valve is more clearly visible. The shut-off valve can be mechanically pre-tensioned by means of a tension lever 15 and can be triggered manually or automatically by means of the electromagnet 20. The locking element 8 can be pre-tensioned against the spring force of the closing spring 23 in its open position. Additionally, the Figure 2Further components include a connector 16, which connects the clamping lever 15 to the toggle joint 17. The electromagnet 20 is positioned so that it can release the clamping spindle 19 in the event of a manually or fault-induced voltage drop. A spring then disengages the spindle from a pawl 18, which in turn releases the toggle joint 17. Due to the spring force of the closing spring 23, the locking element 8 is disengaged to the point that it engages in the valve seat 7 in the valve housing 2 and closes the fluid line therein. Because the electromagnet 20 is always in operation during the opening of the quick-closing valve, a heat sink 22 is provided on it to dissipate the operating heat.

[0028] Figure 3Figure 1 shows a detailed schematic representation of a prior art device for closing a fluid container, illustrating various components and their arrangement. In the prior art, the device serves as a separate unit for the existing fluid outlet of the quick-closing valve. Figure 1 and 2 The device is designed to be mounted on the fluid outlet to measure the pressure and, if necessary, reduce it via a rotary control 11. A pressure gauge 14, i.e., a manometer, is connected to the fluid line extending into the device via a pipe 13. The pressure in the fluid line can thus be measured using the pressure gauge 14.

[0029] The problem in this context is that the order according to Figure 3The pressure gauge 14 is mounted externally on the quick-closing valve, thus providing an additional interface and a potential leakage point, and can only indicate the pressure behind the quick-closing valve. If the quick-closing valve is closed, the pressure gauge 14 cannot provide a meaningful reading in the prior art. However, a reverse arrangement, in which the device is initially mounted according to... Figure 3 and then the quick-closing valve according to Figure 1 or 2 Connecting it to a container is not recommended for safety reasons. The quick-closing valve is intended to ensure a secure closure of the container, but this is not guaranteed when multiple elements are connected upstream.

[0030] Figure 4Figure 1 shows a representation of a device 1 according to the invention for closing a fluid container, comprising various essential components. The description of the quick-closing valve will be kept brief, as it essentially corresponds to the function of the quick-closing valve according to Figure 1. Figure 1 and 2 agrees.

[0031] The device 1 includes a valve housing 2, which has a fluid line 3 with a fluid inlet 4 and a fluid outlet 5. The fluid line 3 is designed to be shut off by means of a shut-off valve 6. A key feature of this device is the pressure gauge 14, which is located inside the valve housing 2 between the fluid inlet 4 and the shut-off valve. The pressure gauge 14 serves to indicate the fluid pressure at the fluid inlet 4. The pressure gauge 14 is attached to a connecting pipe 13, which is fluid-tightly connected to the valve housing 2. A measuring branch 12, which connects to the fluid line 3 between the fluid inlet 4 and the shut-off valve, allows the pressure gauge 14 to be integrated into the system, thus eliminating the need for an additional interface while still enabling a display of the tank pressure even when the shut-off valve is closed.To prevent the pressure gauge 14 from being damaged by dirt particles, the chlorine gas is only directed to the pressure gauge 14 after passing through an integrated filter, which is not shown in the figures.

[0032] Another important element of the device is the control valve 10, which is arranged between the shut-off valve and the fluid outlet. The control valve 10 serves to limit the outlet velocity of the fluid. It is adjustable by means of a rotary control 11, which preferably allows stepless adjustment of the control valve 10 between a position that blocks the fluid outlet 5 and a position that releases the fluid outlet 5.

[0033] Figure 5 shows a frontal view of a device 1 according to Figure 4 The device 1 comprises a valve housing 2 containing a fluid line 3, as described in the parallel. Figure 6The fluid inlet 4 and the fluid outlet 5 are arranged at the respective ends of the fluid line 3. A shut-off valve 6 is integrated into the fluid line 3 to regulate the flow.

[0034] A pressure gauge 14 branches off inside the valve housing 2 between the fluid inlet 4 and the shut-off valve 6 to indicate the applied fluid pressure. The pressure gauge 14 is connected via a fluid-tight line 13 to a measuring branch 12, which connects to the fluid line 3.

[0035] Figure 6 shows a cross-section of the device along line VI-VI in Figure 5The internal structure and operation of the device are described in detail here. The shut-off valve 6 has a valve seat 7, which is located within a valve branch of the fluid line 3. A shut-off element 8 can engage in the valve seat 7 to separate the fluid outlet 5 from the fluid inlet 4. The shut-off element 8 is guided by a fluid-tight valve body 2 with a fluid-tight cap screw to ensure a fluid-tight seal.

[0036] A control valve 10 is also arranged between the shut-off valve 6 and the fluid outlet 5, which regulates the outlet velocity of the fluid. The control valve 10 can be continuously adjusted between a position that closes the fluid outlet 5 and a position that opens the fluid outlet 5 by means of a rotary control 11. In the illustrated embodiment, the control valve 10 is a ball valve.

[0037] The ball valve consists of two parts: a first part for vacuum regulation and a second part for residual pressure protection. The vacuum regulator, as a pressure-reducing valve, plays a crucial role in the safety of the present device. For vacuum regulation, a first valve ball 24 is provided, which, in its closed initial state, rests tightly against a first valve seat 25. It is pressed onto the seat by a first closing spring 26 and the pressure from the chlorine cylinder, thus closing the system. After an injector, which is to draw chlorine from the system, is switched on, a vacuum builds up between a working diaphragm 30 and the first valve seat 25. This creates a force on the working diaphragm 30 of the vacuum regulator directed towards the first valve seat 25, which is transmitted to the first valve ball 24 via a valve pin 31.The first valve ball 24 is thereby forced out of the first valve seat 25, allowing chlorine gas to enter the vacuum system. Upon collapse of the vacuum, the first valve ball 24 falls abruptly back onto the first valve seat 25 and stops the flow of chlorine gas through the fluid outlet 5.

[0038] Simultaneous withdrawal is also possible with this device. A maximum of 1% of the original contents may be withdrawn continuously from a chlorine cylinder per hour. For example, this results in a maximum withdrawal rate of 650 grams of Cl₂ per hour for a 65 kg cylinder. In most applications, a single cylinder is insufficient to supply chlorine because significantly more than 650 grams per hour needs to be dosed. In these cases, chlorine gas is drawn simultaneously from several cylinders in a so-called battery operation. To ensure that the connected cylinders are emptied evenly, all vacuum regulators must begin supplying chlorine at the same negative pressure.

[0039] The device features an adjustment mechanism for the opening pressure. An adjusting screw 33 sets the force between an opening spring 32 and the first closing spring 26. This ensures that all vacuum regulators within the battery have the same opening pressure, thus guaranteeing the most uniform possible extraction from all connected containers.

[0040] The device also allows for flow limitation. If several connected bottles are already empty and the full dosage is requested, an unacceptably high amount of chlorine gas would be drawn from the partially filled bottles, which would lead to bottle icing. This is prevented by a flow restrictor integrated into the fluid outlet 5. This restrictor allows a maximum withdrawal rate of approximately 1000 grams per hour. It is a pipe sleeve that reduces the cross-section of the fluid outlet 5 and is not shown in the figures.

[0041] To implement a residual pressure safety device, a second valve ball 27 is provided, which acts in the opposite direction to the first valve ball 24. When the chlorine cylinder is emptied, the cylinder pressure drops until it is no longer able to lift the second valve ball 27 against a second closing spring 29 from a second valve seat 28.

[0042] A residual pressure of approximately 0.1 bar remains in the bottle. This effectively prevents moisture from entering the chlorine bottle during bottle changes. Moisture in the chlorine bottle can lead to internal corrosion of the pressure vessel and thus to contamination of the chlorine gas. The residual pressure safety device therefore ensures a long service life for the chlorine container.

[0043] The shut-off valve 6 can be mechanically pre-tensioned by means of a tension lever 15 and can be triggered manually by means of a release lever 21 or automatically by an electromagnet 20. The tension lever 15 is connected to a toggle joint 17, which allows the release of a closing spring 23. The closing spring 23 ensures that the locking element 8 is moved into the locked position as soon as the release lever 21 is actuated. Conversely, the shut-off valve 6 is opened by pressing the tension lever 15.

[0044] The components shown and their arrangement within the device ensure precise control of the fluid flow and a reliable seal of the fluid reservoir. The integration of the pressure gauge 14 enables continuous monitoring of the applied pressure, while the control valve 10 allows flexible adjustment of the outlet velocity.

[0045] The above description thus describes a device for sealing a fluid container which avoids leaks as far as possible, can be manufactured as cost-effectively as possible and provides a design that is as little prone to errors as possible. REFERENCE MARK LIST

[0046] 1 Device 2 Valve housing 3 Fluid line 4 Fluid inlet 5 Fluid outlet 6 Shut-off valve 7 Valve seat 8 Shut-off element 9xxx 10 Control valve 11 Rotary actuator 12 Measuring branch 13 Line pipe 14 Pressure gauge 15 Tension lever 16 Connector 17 Knee joint 18 Locking pawl 19 Tensioning spindle 20 Electromagnet 21 Release 22 Heat sink 23 Closing spring 24 First valve ball 25 First valve seat 26 First closing spring 27 Second valve ball 28 Second valve seat 29 Second closing spring 30 Working diaphragm 31 Valve pin 32 Opening spring 33 Adjusting screw

Claims

1. Device for closing a fluid container with a valve housing (2) which has a fluid line (3) with a fluid inlet (4) and a fluid outlet (5), wherein the fluid line (3) is shut off by means of a shut-off valve (6), characterized by the fact that A pressure gauge (14) is assigned to the fluid line (3) within the valve housing (2) between the fluid inlet (4) and the shut-off valve (6) to indicate the fluid pressure applied to the fluid inlet (4).

2. Device according to claim 1, characterized by the fact that a measuring branch (12) is assigned to the valve housing (2), which meets the fluid line (3) between the fluid inlet (4) and the shut-off valve (6), and to which a line pipe (13) for attaching the pressure gauge (14) to the valve housing (2) is assigned in a fluid-tight manner.

3. Device according to one of claims 1 or 2, characterized by the fact thatA control valve (10) is assigned to the fluid line (3) between the shut-off valve (6) and the fluid outlet (5).

4. Device according to one of the preceding claims, characterized by the fact that The control valve (10) for providing vacuum control comprises a first valve ball (24) which is pressed into a first valve seat (25) by the spring force of a first closing spring (26), wherein a working diaphragm 30 is arranged in a chamber between the fluid outlet (5) and the first valve seat (25), which has a valve pin (31) for displacing the first valve ball (24) from the first valve seat (25) when a vacuum occurs between the working diaphragm (30) and the first valve seat (25).

5. Device according to claim 3, characterized by the fact thatThe control valve (10) can be adjusted, preferably steplessly, by means of a rotary control (11) to adjust the control valve (10) between a position that blocks the fluid outlet (5) and a position that releases the fluid outlet (5).

6. Device according to one of claims 3 to 5, characterized by the fact that The rotary actuator (11) is associated with an adjusting screw (33) which can be used to influence a minimum distance of the valve pin (31) from the first valve ball (24) against the pressure of an opening spring (32).

7. Device according to one of claims 3 to 6, characterized by the fact that The control valve (10) for providing residual pressure protection comprises a second valve ball (27) which is pressed into a second valve seat (28) by the spring force of a second closing spring (29), wherein the direction of action of the second valve ball (27) is in the opposite direction to the first valve ball (24).

8. Device according to one of the preceding claims, characterized by the fact that The shut-off valve (6) is a quick-closing valve that can be mechanically pre-tensioned by means of a tension lever (15) and manually or automatically triggered by means of an electromagnet (20).

9. Device according to claim 8, characterized by the fact that The fluid line (3) forms a valve seat (7) in a valve branch, into which a locking element (8) can be engaged by the fluid-tight valve housing (2) in such a sealing manner that the fluid outlet (5) can be separated from the fluid inlet (4) by the locking element (8).

10. Device according to claim 9, characterized by the fact that the locking element (8) can be biased against the spring force of a closing spring (23) in a free position, wherein the spring force of the closing spring (23) can be released by means of the trigger (21) in order to move the locking element (8) into a locking position that closes the shut-off valve (6).

11. Device according to claim 10, characterized by the fact thatThe trigger (21) actuates a knee joint (17) to release the closing spring (23).

12. Device according to one of the preceding claims, characterized by the fact that a flow restrictor, preferably removable, in the form of a pipe insert narrowing the internal cross-section of the fluid outlet is associated with the fluid outlet (5).

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