Pneumatic control valve and gas distribution device

Abstract

This utility model relates to the technical field of gas distribution devices, and discloses a pneumatic control valve and a gas distribution device. The pneumatic control valve includes a first valve body, a second valve body, and a pressure detection chamber. The first valve body includes a first housing and a first valve core. The first housing has a first conducting chamber and an air inlet, an air filling port, and a first connecting port communicating with the first conducting chamber. The first valve core is disposed within the first conducting chamber and selectively closes or opens the air inlet. The second valve body is connected to the first valve body and is used to control the connection between the first connecting port and the external environment. The pressure detection chamber is connected to the first valve body, and its inner cavity is fluidly connected to the first conducting chamber through a flow channel. The pressure detection chamber is used to house a pressure detection device. The pneumatic control valve of this utility model allows the pressure detection chamber to be positioned between the first and second valve bodies through the flow channel, making the length of the pneumatic control valve with the pressure detection chamber controllable.

Description

Technical Field

[0001] This utility model relates to the technical field of gas distribution devices, and in particular to a pneumatic control valve and a gas distribution device. Background Technology

[0002] In existing technologies, pneumatic comfort systems typically include multiple air bags and multiple air valves that control the inflation and deflation of each air bag. These air valves are usually integrated into a valve module to save installation space. Pressure detection devices can be installed on the air valves to monitor the air pressure inside the corresponding air bag.

[0003] In valve modules, the pressure detection chamber of the air valve is typically located between the inflation nozzle and the circuit board, and is directly connected to the inflation nozzle. The pressure detection chamber is used to house pressure detection devices, such as air pressure sensors. However, in the actual assembly of valve modules, because the pressure detection chamber is integrally formed with the air inlet seat, which has interlocking serial and plug-in interfaces, multiple air valves can be connected together via these interfaces. Alternatively, the air inlet seat may have an air inlet nozzle that plugs into the air inlet pipe. Therefore, the length of the air valve with a pressure detection chamber will differ from that of the air valve without one.

[0004] When some valves (such as active side valves) do not require a pressure detection device and therefore lack a pressure detection chamber, the layout of their inlet seat's serial interface or inlet nozzle is spatially misaligned with that of valves with pressure detection chambers. This results in misalignment of the inlet seat's serial interface, leading to a concentrated air intake channel or misalignment of the inlet nozzles of multiple valves when inserted into the pre-set air intake pipeline. Furthermore, valves with pressure detection chambers require extended inflation nozzles to accommodate the chambers, increasing the overall valve length and consequently the size of the valve module assembling multiple valves, thus increasing the overall space occupancy of the valve module. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a pneumatic control valve and a gas distribution device, which allows the pneumatic control valve with a pressure detection chamber to have the same length as the pneumatic control valve without a pressure detection chamber. At the same time, it ensures that the length of the air inlet of the pneumatic control valve does not increase due to the installation of the pressure detection chamber, thereby avoiding the problem of increased space occupancy during use due to the increased volume of the gas distribution device.

[0006] The technical effects to be achieved by this utility model are realized through the following aspects:

[0007] In a first aspect, this utility model provides a pneumatic control valve, comprising:

[0008] The first valve body includes a first housing and a first valve core. The first housing has a first conduction chamber and an air inlet, an air filling port and a first connecting port communicating with the first conduction chamber. The first valve core is disposed in the first conduction chamber. The first valve body has a first ventilation state in which the first valve core opens the air inlet to communicate with the air filling port, and a second ventilation state in which the first valve core closes the air inlet to communicate with the air filling port.

[0009] A second valve body, connected to the first valve body, is used to control the connection between the first communication port and the external environment; and

[0010] A pressure detection chamber is connected to the first valve body. The inner cavity of the pressure detection chamber is in fluid communication with the first conductive chamber through a flow channel. The pressure detection chamber is used to install a pressure detection device.

[0011] In some implementations, the second valve body includes a second housing and a second valve core. The second housing has a second conduction chamber and an exhaust port and a second connecting port communicating with the second conduction chamber. The second valve core is disposed in the second conduction chamber, and the first connecting port is connected to the second connecting port. The second valve body has a third venting state in which the second valve core closes the second connecting port to cut off communication between the second connecting port and the exhaust port, and a fourth venting state in which the second valve core opens the second connecting port to communicate between the second connecting port and the exhaust port.

[0012] In this implementation, the inner cavity of the air pressure detection chamber is connected to the first connecting chamber via a flow guide channel, and then to the inflation port. This allows for monitoring of the intake air pressure when the inlet is open, as well as the air pressure of the air-using unit fluidly connected to the inflation port. When the air pressure detection device detects that the gas pressure reaches a preset threshold, it controls the second valve core to open the second connecting port. Gas can then sequentially pass through the first connecting chamber, the first connecting port, the second connecting port, and the second connecting chamber, finally being discharged through the exhaust port, ensuring the reliability of the pneumatic control valve.

[0013] In some implementations, the air pressure detection chamber is integrally formed with the first housing.

[0014] In some implementations, the air pressure detection chamber is located between the first valve body and the second valve body, projected along an axis intersecting the first valve body and / or the second valve body.

[0015] In some implementations, the pneumatic control valve further includes a connecting nozzle, which is connected between the first valve body and the second valve body, and the connecting nozzle has a connecting air passage that connects the first communication port and the conduction chamber of the second valve body.

[0016] In this implementation, during exhaust, the gas passes through the first connecting port and the connecting air passage in sequence and enters the conduction chamber of the second valve body. Finally, it is discharged through the exhaust port. The connecting air nozzle makes the connection between the first valve body and the second valve body more stable, thereby enhancing the connection stability of the overall structure. The connecting air passage enables fluid communication between the first conduction chamber and the second conduction chamber.

[0017] In some implementations, the first connection port is located at the first end of the connecting air passage, and there is a connecting gap between the connecting air nozzle and the inner wall of the first guiding chamber to form the guiding channel.

[0018] In some implementations, the flow channel is formed on the first housing.

[0019] In some implementations, the first housing extends to have a plug-in air nozzle communicating with the air inlet.

[0020] In this implementation, the air inlet can be plugged into the air inlet pipe of the overall valve module through a plug-in air nozzle, thereby achieving fluid communication with the air inlet pipe and realizing unified air intake, without the need to form an air inlet pipe by connecting air inlet seats in series.

[0021] In some implementations, the first housing is provided with an air inlet seat, the air inlet seat has an air inlet channel that communicates with the air inlet, one end of the air inlet channel has a serial interface, and the other end has a plug interface that is adapted to be plugged into the serial interface.

[0022] Secondly, this utility model provides a gas distribution device, including an air inlet pipe and a plurality of pneumatic control valves as described above, wherein the air inlets of the plurality of pneumatic control valves are connected to the air inlet pipe.

[0023] In summary, this utility model has at least the following advantages:

[0024] (1) The pneumatic control valve provided by this utility model has a pneumatic pressure detection chamber connected to the first valve body, and the inner cavity of the pneumatic pressure detection chamber is connected to the first conduction chamber of the first valve body through a flow guide channel. This ensures that the pneumatic pressure detection device installed in the pneumatic pressure detection chamber can monitor the air pressure at the air inlet and air outlet connected to the first conduction chamber. In addition, it can monitor the air inlet pressure value and the air outlet pressure value. At the same time, the pneumatic pressure detection chamber can be set at the position between the first valve body and the second valve body. This avoids the pneumatic control valve from increasing in length due to the setting of the pneumatic pressure detection chamber, so that the pneumatic control valve with the pneumatic pressure detection chamber and the pneumatic control valve without the pneumatic pressure detection chamber can have the same length dimensions.

[0025] (2) The gas distribution device provided by this utility model has a gas pressure detection chamber located between the first valve body and the second valve body. The inner cavity of the gas pressure detection chamber is connected to the first conduction chamber through the flow channel. On the basis of realizing gas pressure detection, it enables the air inlet seats of multiple pneumatic control valves to be aligned and connected in series, or the plug-in air nozzles to be aligned and plugged into the air inlet pipe. This facilitates the alignment and assembly of multiple pneumatic control valves, so that pneumatic control valves without gas pressure detection devices and pneumatic control valves with gas pressure detection devices can be aligned and share a centralized air inlet channel. At the same time, the length of the air inlet of the pneumatic control valve will not increase due to the setting of the gas pressure detection chamber, thereby avoiding the problem of increased space occupancy during use due to the increase in the volume of the gas distribution device. Attached Figure Description

[0026] Figure 1 A three-dimensional structural schematic diagram of the pneumatic control valve provided in an embodiment of this utility model;

[0027] Figure 2 A schematic cross-sectional view of the pneumatic control valve provided in an embodiment of this utility model;

[0028] Figure 3 This is an exploded view of the pneumatic control valve according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic cross-sectional view of the assembly structure of the first housing, the second housing, and the air pressure detection chamber.

[0030] Marked in the image:

[0031] 100. First valve body; 110. First housing; 111. First conduction chamber; 112. Air inlet; 113. Air filling port; 114. First connecting port; 120. First valve core; 130. Inserted air nozzle; 140. First coil; 150. First spring;

[0032] 200, Second valve body; 210, Second housing; 211, Second conduction chamber; 212, Exhaust port; 213, Second connecting port; 220, Second valve core; 230, Second coil; 240, Second spring;

[0033] 300. Air pressure detection chamber;

[0034] 400. Flow diversion channel;

[0035] 500. Air pressure detection device;

[0036] 600. Connect the air nozzle; 601. Connect the air passage. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] Firstly, please refer to the appendix. Figure 1 ~Appendix Figure 4 The pneumatic control valve provided in this embodiment of the utility model includes a first valve body 100, a second valve body 200, and a pneumatic pressure detection chamber 300.

[0040] Please see below. Figure 1 and Figure 2 , Figure 1 and Figure 2 The diagram illustrates the structural relationship between the first valve body 100, the second valve body 200, and the air pressure detection chamber 300 in this embodiment of the present invention. Specifically, the first valve body 100 includes a first housing 110 and a first valve core 120. The first housing 110 has a first conducting chamber 111 and an air inlet 112, an air filling port 113, and a first connecting port 114 communicating with the first conducting chamber 111. The first valve core 120 is disposed in the first conducting chamber 111 and selectively closes or opens the air inlet 112. When the first valve core 120 is in the open position of the air inlet 112, the first valve body 100 is in a first ventilated state, which can be defined as an inflated state. In this first ventilated state, the air inlet 112 is open and communicates with at least the inflation port 113. When the first valve core 120 is in the closed position of the air inlet 112, the first valve body 100 is in a second ventilated state, which can be defined as a deflated state. In this second ventilated state, the air inlet 112 is closed and the inflation port 113 communicates with the first connecting port 114. The second valve body 200 is connected to the first valve body 100 and is used to control the connection between the first connecting port 114 and the external environment. The air pressure detection chamber 300 is connected to the first valve body 100. The inner cavity of the air pressure detection chamber 300 is in fluid communication with the first conductive chamber 111 through the guide channel 400. The air pressure detection chamber 300 is used to house the air pressure detection device 500.

[0041] In a preferred embodiment, the first valve body 100 is selected as a solenoid valve, such as a two-position three-way solenoid valve. The first valve body 100 also includes a first coil 140 and a first spring 150. The first coil 140 is wound around the first housing 110, and the first valve core 120 is disposed in the first conducting chamber 111. The two ends of the first spring 150 abut against the inner walls of the first valve core 120 and the first housing 110, respectively, so that the first valve core 120 normally closes the air inlet 112. At this time, the air inlet 113 and the first connecting port 114 are interconnected through the gap between the first conducting chamber 111 and the first valve core 120, i.e., in a deflated state. When the first coil 140 is energized, the first valve core 120 moves toward the first connecting port 114, thereby pressing the first spring 150, so that the air inlet 112 opens and the first connecting port 114 closes. At this time, the air inlet 112 and the air inlet 113 are interconnected, i.e., in an inflated state. After inflation is complete, the first coil 140 is de-energized, the first valve core 120 is reset by the elastic action of the first spring 150 and closes the first air inlet 112 again, the inflation port 113 and the first connecting port 114 are connected again, the first valve body 100 is in the deflation state, and when the second valve body 200 is in the state of closing the first connecting port 114, the overall pneumatic control valve is in the pressure holding state; and when the second valve body 200 is in the state of opening the first connecting port 114, the overall pneumatic control valve is in the exhaust state.

[0042] The inflation port 113 is used to connect to an external air-consuming unit. When the pneumatic control valve is in the inflation state, gas enters the first guiding chamber 111 through the air inlet 112, and then inflates the air-consuming unit through the inflation port 113. Additionally, the gas entering the first guiding chamber 111 also enters the air pressure detection chamber 300 through the guide channel 400, allowing the air pressure detection device 500 to monitor the air pressure at the air inlet 112 and the inflation port 113, i.e., the intake air pressure value and the inflation air pressure value. When the pneumatic control valve is in the pressure-holding state, the air pressure detection device 500 can monitor the internal air pressure of the air-consuming unit. When the internal air pressure value exceeds a preset air pressure threshold, it controls the second valve body 200 to connect the first connecting port 114 to the external environment, allowing gas to be released through the first connecting port 114, thus preventing damage to the air-consuming unit due to excessive air pressure.

[0043] Meanwhile, based on the above-mentioned configuration of the pneumatic control valve, the air pressure detection chamber 300 can be positioned between the first valve body 100 and the second valve body 200, avoiding the problem of increased length of the pneumatic control valve due to the configuration of the air pressure detection chamber 300. This allows the pneumatic control valve with and without the air pressure detection chamber 300 to have the same length. Thus, the pneumatic control valve with and without the air pressure detection chamber 300 can be aligned and thus can be inserted into the centralized air intake channel.

[0044] It should be noted that the external environment can be the atmospheric environment, a space connected to the atmospheric environment via a guide pipe, or a pre-designed internal gas circulation space, etc.

[0045] It is understandable that, since the air pressure detection chamber 300 is connected to the first valve body 100, and the inner cavity of the air pressure detection chamber 300 is connected to the first conduction chamber 111 through the flow guide channel 400, in addition to realizing gas pressure detection, it also avoids the problem that when multiple pneumatic control valves are spliced ​​together through serial interfaces and plug interfaces, the pneumatic control valves that do not need to be equipped with air pressure detection devices 500 cannot be aligned with the pneumatic control valves equipped with air pressure detection devices and thus form a centralized air intake channel.

[0046] In the aforementioned pneumatic control valve, the air pressure detection chamber 300 is connected to the first valve body 100, and the inner cavity of the air pressure detection chamber 300 is connected to the first conduction chamber 111 of the first valve body 100 through the flow guide channel 400. This ensures that the air pressure detection device 500 installed in the air pressure detection chamber 300 can monitor the air pressure at the air inlet 112 and the inflation port 113 connected to the first conduction chamber 111. This allows for monitoring of the intake air pressure value and the inflation air pressure value. At the same time, the air pressure detection chamber 300 can be positioned between the first valve body 100 and the second valve body 200, avoiding an increase in the length of the pneumatic control valve due to the installation of the air pressure detection chamber 300. This ensures that the pneumatic control valves with and without the air pressure detection chamber 300 have the same length dimensions.

[0047] In some preferred embodiments, please refer to Figure 2 , Figure 2The diagram illustrates the structural relationship between the second housing 210 and the second valve core 220 in this embodiment of the present invention. Specifically, the second valve body 200 includes a second housing 210 and a second valve core 220. The second housing 210 has a second conducting chamber 211 and an exhaust port 212 and a second connecting port 213 communicating with the second conducting chamber 211. The second valve core 220 is disposed in the second conducting chamber 211 and selectively closes or opens the second connecting port 213. The first connecting port 114 is connected to the second connecting port 213. When the second valve core 220 is in the position of closing the second communication port 213, the second valve body 200 is in the third venting state, which can be defined as the pressure holding state of the overall pneumatic control valve. In this third venting state, the second communication port 213 is closed, thus cutting off the connection between the second communication port 213 and the exhaust port 212, even though the first communication port 114 is cut off from the connection between the first communication port 114 and the exhaust port 212. When the second valve core 220 is in the position of opening the second communication port 213, the second valve body 200 is in the fourth venting state, which can be defined as the exhaust state of the overall pneumatic control valve. In this fourth venting state, the second communication port 213 is opened and connected to the exhaust port 212, even though the first communication port 114 is connected to the exhaust port 212.

[0048] In a preferred embodiment, the second valve body 200 can be selected as a solenoid valve. The second valve body 200 further includes a second coil 230 and a second spring 240. The second coil 230 is wound around the second housing 210, and the second valve core 220 is disposed within the second conduction chamber 211. The two ends of the second spring 240 abut against the inner walls of the second valve core 220 and the second housing 210, respectively, so that the second valve core 220 normally closes the second communication port 213. At this time, the second communication port 213 is closed by the second valve core 220, and the pneumatic control valve is in a charging or pressure-holding state. When the second coil 230 is energized, the second valve core 220 moves towards the exhaust port 212, thereby pressing the second spring 240, causing the second communication port 213 to open. At this time, the second communication port 213 and the exhaust port 212 are interconnected, i.e., in an exhaust state.

[0049] The inner cavity of the air pressure detection chamber 300 is connected to the first connecting chamber 111 via the flow guide channel 400, and then to the inflation port 113. This allows for monitoring of the intake air pressure when the air inlet 112 is open, as well as the air pressure of the air-using unit fluidly connected to the inflation port 113. When the air pressure detection device 500 detects that the gas pressure reaches a preset air pressure threshold, it controls the second valve core 220 to open the second connecting port 213. Gas can then pass sequentially through the first connecting chamber 111, the first connecting port 114, the second connecting port 213, and the second connecting chamber 211, finally being discharged through the exhaust port 212, ensuring the reliability of the pneumatic control valve.

[0050] In some preferred embodiments, the gas pressure detection chamber 300 is integrally formed with the first housing 110. Specifically, the gas pressure detection chamber 300 can be integrally injection molded during the molding of the first housing 110. This enhances the connection stability between the gas detection chamber and the first housing 110 and makes the overall structure more compact.

[0051] In some preferred embodiments, the pressure detection chamber 300 is located between the first valve body 100 and the second valve body 200, projected along the axis intersecting the first valve body 100 and / or the second valve body 200, such as along the axis perpendicular to the first valve body 100 and / or the second valve body 200. The location of the pressure detection chamber 300 between the first valve body 100 and the second valve body 200 avoids an increase in length due to its placement, avoids interference with the coils of the first valve body 100 and the second valve body 200, and facilitates the placement of the pressure detection chamber 300. Gas can enter the pressure detection chamber 300 through the guide channel 400 and be detected by the pressure detection device 500. When the pressure exceeds a preset threshold, it can be discharged through the exhaust port 212 of the second valve body 200, ensuring the placement and operational reliability of the pressure detection device 500. In a specific embodiment, the air pressure detection chamber 300 can be located at one end of the first valve body 100 near the second valve body 200. After the gas is detected by the air pressure detection device 500, it can be discharged through the exhaust port 212, making the structure more compact.

[0052] In some preferred embodiments, please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 The diagram illustrates the structural relationship between the connecting nozzle 600 and the first valve body 100 and the second valve body 200 in this embodiment of the invention. Specifically, the pneumatic control valve further includes a connecting nozzle 600, which is connected between the first valve body 100 and the second valve body 200. The connecting nozzle 600 has a connecting air passage 601 that connects the first connecting port 114 and the conductive chamber of the second valve body 200. Both ends of the connecting nozzle 600 are respectively inserted into the first valve body 100 and the second valve body 200; a sealing ring is fitted on the connecting nozzle 600 to achieve a sealed connection with the first valve body 100 and the second valve body 200. Gas sequentially passes through the first connecting port 114 and the connecting air passage 601 and enters the conductive chamber of the second valve body 200, finally exiting through the exhaust port 212. The connecting nozzle 600 makes the connection between the first valve body 100 and the second valve body 200 more stable, thereby enhancing the overall structural connection stability.

[0053] In this configuration, the first end of the connecting nozzle 600 can extend into the first conductive chamber 111 and be sealed and assembled with the first housing 110 of the first valve body 100 via a sealing ring. In this case, the first connecting port 114 can be opened at the first end of the connecting air passage 601. Alternatively, the first connecting port 114 can be formed by extending from the inner wall of the first housing 110 of the first valve body 100, and the first end of the connecting nozzle 600 can be sealed and connected to the first housing 110 via a sealing ring, with the first end of the connecting air passage 601 communicating with the first connecting port 114.

[0054] In some preferred embodiments, please refer to Figure 4 , Figure 4 The specific structure of the flow channel 400 in this embodiment of the present invention is shown. A first connecting port 114 is opened at the first end of the connecting air passage 601, and a conductive gap exists between the connecting air nozzle 600 and the inner wall of the first conductive chamber 111 to form the flow channel 400. After the gas enters the first conductive chamber 111, it enters the pressure detection chamber 300 through the flow channel 400, thereby enabling the pressure detection device 500 disposed within the pressure detection chamber 300 to detect the gas pressure.

[0055] Furthermore, the second end of the connecting nozzle 600 can extend into the second guide chamber 211 and be sealed and assembled with the second housing 210 of the second valve body 200 through a sealing ring. At this time, the second connecting port 213 can be opened at the second end of the connecting air passage 601. With the second connecting port 213 on the connecting nozzle 600, the connecting air passage 601 is directly connected to the second guide chamber 211. Gas enters the second guide chamber 211 directly through the connecting nozzle 600, shortening the distance the gas needs to travel from the first guide chamber 111 to the second guide chamber 211 and reducing air resistance, thereby making exhaust more efficient.

[0056] In some other embodiments, the second communication port 213 may be formed by extending from the inner wall of the second housing 210 of the second valve body 200, and the second end of the connecting nozzle 600 is sealed to the second housing 210 by a sealing ring, and the second end of the connecting air passage 601 is connected to the second communication port 213.

[0057] In some preferred embodiments, the flow channel 400 may be formed on the first housing 110. The flow channel 400 is in fluid communication with the first conductive chamber 111. In this case, the flow channel 400 is independently set relative to the first conductive chamber 111 and integrally formed on the first housing 100. The first end of the flow channel 400 is connected to the first conductive chamber 111, and the second end is connected to the inner cavity of the pressure detection chamber 300, so that the gas in the first conductive chamber 111 can enter the pressure detection chamber 300 through the flow channel 400 to realize the pressure detection of the gas.

[0058] In some preferred embodiments, the first housing 110 extends with a plug-in nozzle 130 communicating with the air inlet 112. When multiple pneumatic control valves are assembled into a valve module, the air inlet 112 can be plugged into the air intake pipeline of the overall valve module via the plug-in nozzle 130. Specifically, the air intake pipeline may have a plug-in hole adapted to the plug-in nozzle 130; a sealing ring may be fitted on the plug-in nozzle 130 to seal the plug-in hole. For example, the plug-in nozzles 130 of multiple pneumatic control valves are respectively plugged into multiple plug-in holes of the air intake pipeline of the overall valve module. Since the plug-in nozzle 130 is fitted with a sealing ring, the connection sealing between the plug-in nozzle 130 and the plug-in hole is ensured, thereby achieving fluid communication with the air intake pipeline and realizing unified air intake without the need for air intake seats to form an air intake pipeline. Preferably, the air intake pipeline can be a flexible hose.

[0059] In some preferred embodiments, the first housing 110 is provided with an air inlet seat, which has an air inlet channel communicating with the air inlet 112. One end of the air inlet channel has a serial interface, and the other end has a plug-in interface adapted to the serial interface. When multiple pneumatic control valves are assembled into a valve module, the serial interface of the air inlet seat of one pneumatic control valve is connected to the plug-in interface of the air inlet seat of the adjacent pneumatic control valve to form an air inlet pipeline, thereby realizing the splicing of multiple pneumatic control valves and unified air intake.

[0060] Secondly, based on the above embodiments, this utility model also provides a gas distribution device.

[0061] The gas distribution device of this utility model includes an air inlet pipe and a plurality of pneumatic control valves as described above.

[0062] The air inlets 112 of multiple pneumatic control valves are connected to an air inlet pipeline. The air inlet pipeline is used to connect to an air source so that the air inlets 112 of the multiple pneumatic control valves can be connected to the air source and receive air uniformly.

[0063] In this embodiment of the invention, the air inlet 112 is connected to the air intake pipeline. When the first valve body 100 is provided with a plug-in nozzle 130 connected to the air inlet 112, the connection can be achieved by plugging the plug-in nozzle 130 into the air intake pipeline. Specifically, the plug-in nozzles 130 of multiple pneumatic control valves are respectively plugged into multiple plug-in holes of the air intake pipeline of the overall valve module, thereby achieving fluid communication with the air intake pipeline and realizing unified air intake. When the first valve body 100 is provided with an air intake seat connected to the air inlet 112, the air intake seats of adjacent pneumatic control valves are connected in series to form an air intake pipeline. Specifically, the air intake seats of multiple pneumatic control valves are all provided with an air intake channel connected to the air inlet 112. One end of the air intake channel has a serial interface and the other end has a plug interface. The serial interface and the plug interface of the adjacent air intake seat are connected to form an air intake pipeline, thereby realizing the splicing of multiple pneumatic control valves.

[0064] The gas distribution device of this invention, with the pressure detection chamber 300 located between the first valve body 100 and the second valve body 200, and the inner cavity of the pressure detection chamber 300 connected to the first guiding chamber 111 through the guide channel 400, enables the air inlet seats of multiple pneumatic control valves to be aligned and connected in series, or the plug-in nozzles 130 to be aligned and plugged into the air inlet pipe, facilitating the aligned arrangement and assembly of multiple pneumatic control valves. This allows pneumatic control valves without a pressure detection device 500 to be aligned with those with a pressure detection device and share a centralized air inlet channel. At the same time, the length of the air inlet of the pneumatic control valve will not increase due to the setting of the pressure detection chamber 300, thereby avoiding the problem of increased space occupancy during use due to the increased volume of the gas distribution device.

[0065] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0067] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0068] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0069] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A pneumatic control valve, characterized in that, include: The first valve body (100) includes a first housing (110) and a first valve core (120). The first housing (110) has a first conducting chamber (111) and an air inlet (112), an air filling port (113) and a first connecting port (114) communicating with the first conducting chamber (111). The first valve core (120) is disposed in the first conducting chamber (111). The first valve body (100) has a first ventilation state in which the first valve core (120) opens the air inlet (112) to communicate with the air filling port (113), and a second ventilation state in which the first valve core (120) closes the air inlet (112) to communicate with the air filling port (113). The second valve body (200), connected to the first valve body (100), is used to control the opening and closing of the first communication port (114) with the external environment; and A pressure detection chamber (300) is connected to the first valve body (100). The inner cavity of the pressure detection chamber (300) is in fluid communication with the first conductive chamber (111) through a flow channel (400). The pressure detection chamber (300) is used to install a pressure detection device (500).

2. The pneumatic control valve according to claim 1, characterized in that, The second valve body (200) includes a second housing (210) and a second valve core (220). The second housing (210) has a second conduction chamber (211) and an exhaust port (212) and a second connection port (213) communicating with the second conduction chamber (211). The second valve core (220) is disposed in the second conduction chamber (211). The first connection port (114) is connected to the second connection port (213). The second valve body (200) has a third ventilation state in which the second valve core (220) closes the second connection port (213) so that the second connection port (213) is cut off from communication with the exhaust port (212), and a fourth ventilation state in which the second valve core (220) opens the second connection port (213) so that the second connection port (213) is connected to the exhaust port (212).

3. The pneumatic control valve according to claim 1, characterized in that, The air pressure detection chamber (300) is integrally formed with the first housing (110).

4. The pneumatic control valve according to claim 1, characterized in that, Projected along the axis intersecting the first valve body (100) and / or the second valve body (200), the air pressure detection chamber (300) is located between the first valve body (100) and the second valve body (200).

5. The pneumatic control valve according to claim 1, characterized in that, It also includes a connecting nozzle (600), which is connected between the first valve body (100) and the second valve body (200), and the connecting nozzle (600) has a connecting air passage (601) that connects the first connecting port (114) and the second valve body (200).

6. The pneumatic control valve according to claim 5, characterized in that, The first connecting port (114) is opened at the first end of the connecting air passage (601), and there is a connecting gap between the connecting air nozzle (600) and the inner wall of the first guiding chamber (111) to form the guiding channel (400).

7. The pneumatic control valve according to claim 1, characterized in that, The flow channel (400) is formed on the first housing (110).

8. The pneumatic control valve according to claim 1, characterized in that, The first housing (110) extends to have a plug-in air nozzle (130) communicating with the air inlet (112).

9. The pneumatic control valve according to claim 1, characterized in that, The first housing (110) is provided with an air inlet seat, the air inlet seat is provided with an air inlet channel that connects to the air inlet (112), one end of the air inlet channel has a serial interface, and the other end has a plug interface that is adapted to be plugged into the serial interface.

10. A gas distribution device, characterized in that, It includes an air intake line and a plurality of pneumatic control valves as described in any one of claims 1 to 9, wherein the air inlets (112) of the plurality of pneumatic control valves are connected to the air intake line.

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