Instrument air compressor and raw material air compressor parallel connection blow-by device

Abstract

The utility model relates to the technical field of air compressors, in particular to an instrument air compressor and raw material air compressor parallel connection blow-by device. According to the technical scheme, the instrument air compressor and raw material air compressor parallel connection blow-by device comprises a shell, a first connecting pipe, a second connecting pipe and a bottom plate, the first connecting pipe and the second connecting pipe are installed in the shell, and a first branch pipe and a second branch pipe are connected between the first connecting pipe and the second connecting pipe; the first branch pipe and the second branch pipe are provided with a valve and a one-way valve, a bottom plate is arranged on the back face of the shell, a groove is formed in the bottom plate, a cushion plate is installed on the bottom plate, and nanometer micro suction glue is attached to the positions, located on the cushion plate and the bottom plate, in the groove. The utility model solves the problem that the energy consumption is increased due to the opening of the emptying valve of the instrument air compressor, and simultaneously achieves the purposes of improving the raw material air flow and stabilizing the operation condition of the air separation device.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a parallel gas connection device for an instrument air compressor and a raw material air compressor. Background Art

[0002] An air compressor is a mechanical device that compresses air into high-pressure gas. They are commonly used in industrial and commercial applications to provide energy for compressed air.

[0003] The working principle of air compressors is very simple: they use a mechanical system to compress a large amount of air into a smaller volume. The advantage of this is that it can store more air energy and release this energy when needed. However, in summer, the exhaust pressure of the raw air compressor is insufficient, and the vent valve of the instrument air compressor needs to be opened to increase the raw air flow and stabilize the operating conditions of the air separation unit. However, this method will increase energy consumption and have poor results. Utility Model Content

[0004] The utility model provides a parallel gas connection device for an instrument air compressor and a raw material air compressor, which solves the above-mentioned technical problems.

[0005] The utility model solves the above-mentioned technical problems as follows:

[0006] A parallel gas connection device for an instrument air compressor and a raw material air compressor comprises a shell, a first connecting pipe, a second connecting pipe and a bottom plate, wherein the first connecting pipe and the second connecting pipe are installed inside the shell, a first branch pipe and a second branch pipe are connected between the first connecting pipe and the second connecting pipe, a valve and a one-way valve are installed on the first branch pipe and the second branch pipe, a bottom plate is provided on the back of the shell, a groove is formed on the bottom plate, a pad is installed on the bottom plate, and nano-micro-adhesive is attached to the pad and the bottom plate in the groove.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a shift fork is provided on the pad, and the pad is plug-connected to the bottom plate through the shift fork. When the nano micro-adhesive in the groove needs to be replaced, the nano micro-adhesive can be quickly replaced through the cooperation between the shift fork of the pad and the bottom plate.

[0009] The beneficial effects of adopting the above further scheme are:

[0010] Quick Replacement: The fork design on the backing plate makes it very quick and convenient to replace the nano micro-adhesive. When the nano micro-adhesive in the groove needs to be replaced, the user only needs to pull up the backing plate to remove the fork from the bottom plate. This process is very simple and direct, without the need to use additional tools or disassemble other parts, greatly saving the time and labor cost of replacing parts.

[0011] No additional parts are required: Since the connection between the pad and the bottom plate adopts a fork plug-in design, no additional parts or accessories are required when replacing the nano micro-adhesive. The user only needs to perform simple operations on the fork and the bottom plate to complete the replacement of the nano micro-adhesive. This simplifies the replacement process and reduces the use and management of additional parts.

[0012] Maintain the integrity of the device: Through the plug-in connection between the fork and the bottom plate, the replacement of the nano-micro-adhesive will not affect or damage other parts of the device. The design of the fork maintains the integrity of the bottom plate, ensuring the structural stability and service life of the device.

[0013] Easy operation: The fork plug-in design makes the operation process very simple and does not require special skills or training. Users only need to be familiar with the operating steps to easily complete the replacement of the nano micro-adhesive, which increases the ease of use and convenience of operation of the device.

[0014] Wide applicability: This fork plug design can be used in different environments and application scenarios. Whether in the laboratory, production site or other places where parts need to be replaced, this design can provide users with a convenient and fast replacement experience.

[0015] Furthermore, the gas in the first connecting pipe is unidirectionally conducted to the second connecting pipe through the one-way valve, and the pressure in the first connecting pipe is shared by the second connecting pipe.

[0016] The beneficial effects of adopting the above further scheme are:

[0017] Pressure balance: When the gas pressure in the first connecting pipe increases, it is unidirectionally passed to the second connecting pipe through the one-way valve. This allows the gas in the second connecting pipe to interact with the gas in the first connecting pipe, thereby sharing the pressure in the first connecting pipe. This pressure sharing mechanism ensures the balance and stability of the gas pressure inside the entire system. This is crucial for experiments or industrial production processes that need to maintain a specific pressure range, because too high or too low pressure can cause adverse effects, such as equipment damage or reduced product quality.

[0018] Improve system stability: The gas pressure inside the system is balanced by sharing the pressure in the first connecting pipe through the second connecting pipe. This means that the system is more stable and reduces the instability caused by gas pressure fluctuations. In some pressure-sensitive applications, such as laboratory equipment or precision processing equipment, stable gas pressure is one of the important factors to ensure the accuracy of experimental results and product quality.

[0019] Energy saving: Sharing the pressure of the first connecting pipe through the second connecting pipe actually means that a gas pressure balance is achieved between the two pipes. This can reduce the need for gas compression in the system, thereby saving energy consumption. Especially in industrial production systems that run for a long time, energy saving will significantly reduce costs and improve production efficiency.

[0020] Improved operational flexibility: This pressure sharing mechanism allows the operator to adjust the gas pressure of the system more flexibly. By adjusting the ventilation volume of the second connecting pipe, the pressure in the first connecting pipe can be adjusted without having to adjust the first connecting pipe itself. This operation method is simple and intuitive, which improves the convenience and flexibility of operation.

[0021] Furthermore, the gas in the second connecting pipe is unidirectionally conducted to the first connecting pipe through the one-way valve, and the pressure in the second connecting pipe is shared by the first connecting pipe.

[0022] The beneficial effects of adopting the above further scheme are:

[0023] Pressure balance: This design allows the gas in the second connecting pipe to flow into the first connecting pipe in a one-way manner through the one-way valve, so that the gas pressures of the two connecting pipes can be balanced. When the gas pressure in the second connecting pipe increases, the gas flows to the first connecting pipe through the one-way valve, thereby sharing the pressure in the second connecting pipe. This pressure balance ensures the stability and balance of the gas pressure in the entire system.

[0024] Improve system stability: Similar to the previous case, the gas pressure in the system is regulated and balanced by sharing the pressure in the second connecting pipe with the first connecting pipe. This means that the system is more stable and reduces the instability caused by gas pressure fluctuations. This stability is crucial in experiments or industrial production processes that need to maintain a constant pressure.

[0025] Energy efficiency: By sharing the pressure of the second connecting pipe through the first connecting pipe, the need for gas compression in the entire system is actually reduced. This can reduce the energy consumption of the system and save energy. Especially in long-term industrial production processes, energy saving will significantly reduce costs and improve production efficiency.

[0026] System response speed: When the gas pressure needs to be adjusted quickly, this design makes the system respond faster. By adjusting the ventilation volume of the first connecting pipe, the gas pressure in the second connecting pipe can be quickly adjusted. This operation mode makes the system more responsive to real-time changing needs.

[0027] Operational flexibility: The operator can adjust the gas pressure of the system by adjusting the ventilation volume of the first connecting pipe without directly adjusting the second connecting pipe. This operation method is simple and intuitive, which improves the convenience and flexibility of operation.

[0028] Furthermore, a hand wheel is installed on the valve.

[0029] The beneficial effects of adopting the above further scheme are:

[0030] Easy to operate: The handwheel is used as a control device for the valve, allowing the operator to open or close the valve directly by manually rotating the wheel. This operation method is intuitive and simple, and no additional tools are required, making the control of the system more convenient. Users can quickly adjust the flow and pressure of the gas as needed without having to rely on electric or pneumatic equipment, which increases the flexibility of operation.

[0031] Real-time adjustment: The installation of the handwheel allows the valve to be adjusted in real time, and the operator can respond quickly according to the actual situation of the system. This is very important for experiments or production processes that require frequent adjustment of gas flow or pressure, and can improve work efficiency and accuracy.

[0032] Precise control: Since the rotation of the handwheel can accurately control the degree of valve opening, fine adjustment of gas flow and pressure can be achieved. This is very important for applications that require stable pressure within a specific range, such as laboratory experiments, production processes, etc.

[0033] No additional equipment required: Handwheel-mounted valves do not require additional control equipment, such as motors or pneumatic devices. This not only reduces system costs, but also reduces system complexity and maintenance costs.

[0034] Wide applicability: Due to the simple operation of the handwheel, this design is suitable for gas flow control systems of various sizes and requirements. Whether it is small laboratory equipment or large industrial production lines, this handwheel-controlled valve can be used for gas pressure regulation.

[0035] The beneficial effects of the utility model are:

[0036] Pressure sharing: In this device, the first connecting pipe and the second connecting pipe are connected through the first branch pipe and the second branch pipe, and are respectively installed with a valve and a one-way valve. This design allows the gas to flow one-way between the two connecting pipes. When the gas pressure in the first connecting pipe increases, the one-way valve 6 allows the gas to flow to the second connecting pipe, thereby sharing the pressure of the first connecting pipe. Similarly, when the pressure in the second connecting pipe increases, the gas can flow to the first connecting pipe through the one-way valve 6, achieving the balance and sharing of the gas pressure in the two connecting pipes. This mechanism ensures the stability of the internal pressure of the entire system and avoids the impact of excessive or low pressure on equipment and experiments.

[0037] Convenient replacement: There is a groove on the bottom plate on the back of the device, and a pad is installed, on which nano-micro-adhesive is attached. This structural design makes it very convenient to replace the nano-micro-adhesive. When the nano-micro-adhesive needs to be replaced, the user only needs to separate the pad from the bottom plate with a fork, then easily remove the old nano-micro-adhesive, and then stick the new nano-micro-adhesive on the pad. This operation is simple and fast, saving time and energy for replacing parts, especially in the case of frequent replacement or regular maintenance, the efficiency is significantly improved.

[0038] Manual operation: A hand wheel is installed on the valve, which provides users with a convenient manual operation mode. By rotating the hand wheel, users can easily open or close the valve to control the flow direction and pressure distribution of the gas. This manual operation mode is flexible and intuitive, allowing users to adjust the operating status of the system in real time according to actual needs to ensure the smooth progress of the experiment or production process.

[0039] Wide application: Due to its simple design and clear functions, the device has a wide range of applicability. It can be used in laboratories, industrial production, scientific research and other fields. Whether it is in the case of precise control of gas flow and pressure in experiments or stable gas pressure supply in industrial production, this device is capable of the task. Its flexibility and reliability make it an ideal choice for a variety of scenarios.

[0040] Fast maintenance: In addition to the convenient replacement of the nano-micro-adhesive, the structural design of the entire device is also conducive to fast maintenance. The connection between the various components is simple and clear, which is easy to disassemble and assemble. This means that when maintenance or cleaning is required, the operator can quickly perform the corresponding operations, reducing the idle time of the system and improving the availability and efficiency of the equipment.

[0041] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0043] In the attached picture:

[0044] Figure 1 This is a schematic diagram of the main appearance of the utility model;

[0045] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0046] Figure 3 It is a schematic diagram of the rear axial side appearance of the utility model.

[0047] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0048] 1. Housing; 2. Hand wheel; 3. First connecting pipe; 4. Second connecting pipe; 5. Valve; 6. Check valve; 7. First branch pipe; 8. Second branch pipe; 9. Pad; 10. Groove; 11. Fork; 12. Bottom plate. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] See also Figures 1 to 3 As shown, the embodiments provided by the utility model:

[0051] Embodiment 1

[0052] A parallel gas connection device for an instrument air compressor and a raw material air compressor comprises a housing 1, a first connecting pipe 3, a second connecting pipe 4 and a bottom plate 12. The first connecting pipe 3 and the second connecting pipe 4 are installed inside the housing 1. The first connecting pipe 3 and the second connecting pipe 4 are connected with a first branch pipe 7 and a second branch pipe 8. The first branch pipe 7 and the second branch pipe 8 are installed with a valve 5 and a one-way valve 6. The valve 5 is installed with a hand wheel 2. The hand wheel 2 is used as a control device for the valve 5, so that the operator can directly open or close the valve 5 by manually rotating the wheel. This operation method is intuitive and simple, and no additional tools are required, making the control of the system more convenient. The user can quickly adjust the flow and pressure of the gas as needed without relying on electric or pneumatic equipment, which increases the flexibility of operation. The installation of the hand wheel 2 allows the adjustment of the valve 5 to be carried out in real time, and the operator can quickly respond according to the actual situation of the system. This is very important for experiments or production processes that require frequent adjustment of the gas flow or pressure, and can improve work efficiency and accuracy. Since the rotation of the hand wheel 2 can accurately control the opening degree of the valve 5, fine adjustment of the gas flow and pressure can be achieved. This is very important for applications that need to maintain a stable pressure within a specific range, such as laboratory experiments, production processes, etc. The valve 5 equipped with the handwheel 2 does not require additional control equipment, such as a motor or pneumatic device. This not only reduces the cost of the system, but also reduces the complexity and maintenance cost of the system. Since the handwheel 2 is easy to operate, this design is suitable for gas flow control systems of various sizes and requirements. Whether it is a small laboratory equipment or a large industrial production line, the valve 5 controlled by the handwheel 2 can be used to regulate the gas pressure. The gas in the first connecting pipe 3 is unidirectionally passed to the second connecting pipe 4 through the one-way valve 6, and the pressure in the first connecting pipe 3 is shared through the second connecting pipe 4. When the gas pressure in the first connecting pipe 3 increases, it is unidirectionally passed to the second connecting pipe 4 through the one-way valve 6. This allows the gas in the second connecting pipe 4 to interact with the gas in the first connecting pipe 3, thereby sharing the pressure in the first connecting pipe 3. This pressure sharing mechanism ensures the balance and stability of the gas pressure inside the entire system. This is crucial for experiments or industrial production processes that need to maintain a specific pressure range, because too high or too low pressure may cause adverse effects, such as equipment damage or product quality degradation. By sharing the pressure in the first connecting pipe 3 through the second connecting pipe 4, the gas pressure inside the system is balanced. This means that the system is more stable and reduces the instability caused by gas pressure fluctuations. In some pressure-sensitive applications, such as laboratory equipment or precision processing equipment, stable gas pressure is one of the important factors to ensure the accuracy of experimental results and product quality. Sharing the pressure in the first connecting pipe 3 through the second connecting pipe 4 actually means that a gas pressure balance is achieved between the two pipes. This can reduce the need for gas to be compressed in the system, thereby saving energy consumption.Especially in industrial production systems that run for a long time, energy saving will significantly reduce costs and improve production efficiency. This pressure sharing mechanism allows the operator to adjust the gas pressure of the system more flexibly. By adjusting the ventilation volume of the second connecting pipe 4, the pressure in the first connecting pipe 3 can be adjusted without adjusting the first connecting pipe 3 itself. This operation method is simple and intuitive, which improves the convenience and flexibility of operation. The gas in the second connecting pipe 4 is unidirectionally passed to the first connecting pipe 3 through the one-way valve 6, and the pressure in the second connecting pipe 4 is shared by the first connecting pipe 3. This design allows the gas in the second connecting pipe 4 to be unidirectionally passed to the first connecting pipe 3 through the one-way valve 6, so that the gas pressure of the two connecting pipes can be balanced with each other. When the gas pressure in the second connecting pipe 4 increases, the gas flows to the first connecting pipe 3 through the one-way valve 6, thereby sharing the pressure in the second connecting pipe 4. This pressure balancing effect ensures the stability and balance of the gas pressure inside the entire system. Similar to the previous case, the pressure in the second connecting pipe 4 is shared by the first connecting pipe 3, and the gas pressure in the system is regulated and balanced. This means that the system is more stable and reduces the instability caused by gas pressure fluctuations. This stability is crucial in experiments or industrial production processes that need to maintain a constant pressure. By sharing the pressure of the second connecting pipe 4 through the first connecting pipe 3, the need for gas compression in the entire system is actually reduced. This can reduce the energy consumption of the system and save energy. Especially in industrial production processes that run for a long time, energy saving will significantly reduce costs and improve production efficiency. When the gas pressure needs to be adjusted quickly, this design makes the system respond faster. By adjusting the ventilation volume of the first connecting pipe 3, the gas pressure in the second connecting pipe 4 can be quickly adjusted. This mode of operation makes the system more responsive to real-time changing needs. The operator can adjust the gas pressure of the system by adjusting the ventilation volume of the first connecting pipe 3 without directly adjusting the second connecting pipe 4. This operation mode is simple and intuitive, which improves the convenience and flexibility of operation. The back of the shell 1 is provided with a base plate 12, a groove 10 is provided on the base plate 12, a pad 9 is installed on the base plate 12, a fork 11 is provided on the pad 9, and the pad 9 is connected with the base plate 12 by the fork 11. When the nano micro-suction glue in the groove 10 needs to be replaced, the nano micro-suction glue can be quickly replaced by the fork 11 of the pad 9 and the base plate 12 cooperating with each other, and the fork 11 on the pad 9 is designed to make the replacement of the nano micro-suction glue very fast and convenient. When the nano micro-suction glue in the groove 10 needs to be replaced, the user only needs to pull up the pad 9, and the fork 11 can be removed from the base plate 12. This process is very simple and direct, without the need to use additional tools or disassemble other parts, which greatly saves the time and labor cost of replacing parts. Since the connection between the pad 9 and the base plate 12 adopts the design of the fork 11 plug-in, no additional parts or accessories are required when replacing the nano micro-suction glue.The user only needs to perform simple operations on the fork 11 and the base plate 12 to complete the replacement of the nano micro-suction glue. This simplifies the replacement process and reduces the use and management of additional parts. Through the plug-in connection of the fork 11 and the base plate 12, the other parts of the device will not be affected or damaged during the replacement of the nano micro-suction glue. The design of the fork 11 maintains the integrity of the base plate 12 and ensures the structural stability and service life of the device. The design of the plug-in connection of the fork 11 makes the operation process very simple and does not require special skills or training. The user only needs to be familiar with the operating steps to easily complete the replacement of the nano micro-suction glue, which increases the ease of use and convenience of operation of the device. This design of the plug-in connection of the fork 11 can play a role in different environments and application scenarios. Whether in a laboratory, a production site or other places where parts need to be replaced, this design can provide users with a convenient and quick replacement experience, and the groove 10 is located on the pad 9 and the base plate 12 with nano micro-suction glue attached.

[0053] When the instrument air compressor and the raw material air compressor are connected in parallel and connected in gas connection according to Example 1, the following steps are taken:

[0054] Pressure sharing: In this device, the first connecting pipe 3 and the second connecting pipe 4 are connected through the first branch pipe 7 and the second branch pipe 8, and are respectively installed with a valve 5 and a one-way valve 6. This design allows the gas to be unidirectionally conducted between the two connecting pipes. When the gas pressure in the first connecting pipe 3 increases, the one-way valve 66 allows the gas to flow to the second connecting pipe 4, thereby sharing the pressure of the first connecting pipe 3. Similarly, when the pressure in the second connecting pipe 4 increases, the gas can flow to the first connecting pipe 3 through the one-way valve 66, achieving the balance and sharing of the gas pressure in the two connecting pipes. This mechanism ensures the stability of the internal pressure of the entire system and avoids the impact of excessively high or low pressure on equipment and experiments.

[0055] Convenient replacement: A groove 10 is designed on the bottom plate 12 on the back of the device, and a pad 9 is installed, on which nano-micro-adhesive is attached. This structural design makes it very convenient to replace the nano-micro-adhesive. When the nano-micro-adhesive needs to be replaced, the user only needs to separate the pad 9 from the bottom plate 12 by the fork 11, and then easily remove the old nano-micro-adhesive, and then stick the new nano-micro-adhesive on the pad 9. This operation is simple and quick, saving time and energy for replacing parts, especially in the case of frequent replacement or regular maintenance, the efficiency is significantly improved.

[0056] Manual operation: A hand wheel 2 is installed on the valve 5, which provides a convenient manual operation mode for the user. By rotating the hand wheel 2, the user can easily open or close the valve 5, thereby controlling the flow direction and pressure distribution of the gas. This manual operation mode is flexible and intuitive, allowing the user to adjust the operating status of the system in real time according to actual needs, ensuring the smooth progress of the experiment or production process.

[0057] Wide application: Due to its simple design and clear functions, the device has a wide range of applicability. It can be used in laboratories, industrial production, scientific research and other fields. Whether it is in the case of precise control of gas flow and pressure in experiments or stable gas pressure supply in industrial production, this device is capable of the task. Its flexibility and reliability make it an ideal choice for a variety of scenarios.

[0058] Fast maintenance: In addition to the convenient replacement of the nano-micro-adhesive, the structural design of the entire device is also conducive to fast maintenance. The connection between the various components is simple and clear, which is easy to disassemble and assemble. This means that when maintenance or cleaning is required, the operator can quickly perform the corresponding operations, reducing the idle time of the system and improving the availability and efficiency of the equipment.

[0059] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A parallel gas connection device for an instrument air compressor and a raw material air compressor, characterized in that: The invention comprises a shell (1), a first connecting pipe (3), a second connecting pipe (4) and a bottom plate (12); the first connecting pipe (3) and the second connecting pipe (4) are installed inside the shell (1); a first branch pipe (7) and a second branch pipe (8) are connected between the first connecting pipe (3) and the second connecting pipe (4); a valve (5) and a one-way valve (6) are installed on the first branch pipe (7) and the second branch pipe (8); a bottom plate (12) is provided on the back side of the shell (1); a groove (10) is provided on the bottom plate (12); a pad (9) is installed on the bottom plate (12); nano-micro-adhesive is attached to the pad (9) and the bottom plate (12) in the groove (10).

2. According to claim 1, a parallel gas connection device for an instrument air compressor and a raw material air compressor is characterized in that: The pad (9) is provided with a shift fork (11), and the pad (9) is plug-connected with the bottom plate (12) via the shift fork (11). When the nanometer micro-absorbent adhesive in the groove (10) needs to be replaced, the nanometer micro-absorbent adhesive can be quickly replaced by the shift fork (11) of the pad (9) and the bottom plate (12) cooperating with each other.

3. According to claim 1, the instrument air compressor and the raw material air compressor are connected in parallel and connected in series, characterized in that: The gas in the first connecting pipe (3) is unidirectionally conducted to the second connecting pipe (4) through a one-way valve (6), and the pressure in the first connecting pipe (3) is shared by the second connecting pipe (4).

4. According to claim 1, the instrument air compressor and the raw material air compressor are connected in parallel and connected in series, characterized in that: The gas in the second connecting pipe (4) is unidirectionally conducted to the first connecting pipe (3) through a one-way valve (6), and the pressure in the second connecting pipe (4) is shared by the first connecting pipe (3).

5. According to claim 1, the instrument air compressor and the raw material air compressor are connected in parallel and connected in series, characterized in that: A hand wheel (2) is installed on the valve (5).

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