CN116104971A - Inflation terminal equipment and inflation system - Google Patents

Abstract

The invention provides an inflation terminal device which comprises an inflation head, a pressure reducing valve assembly and a connecting part, wherein the inflation head is arranged at the air outlet end of the pressure reducing valve assembly, one end of the connecting part is provided with a cavity, the pressure reducing valve assembly is arranged in the cavity in a sealing way, the other end of the connecting part is connected with an external air source, an air passage is arranged between two ends of the connecting part, and a pressure detection device communicated with the air passage is arranged on the connecting part close to one side of the external air source. The air charging system further comprises at least one external air source, and the external air source is connected with the air charging terminal equipment through an air pipe. The inflation equipment can further decompress and enable the pressure of the terminal air outlet to be kept stable before air enters the piece to be inflated, the inflation completion condition is known through the pressure detection device, meanwhile, whether the input air pressure is in a normal working range or not is monitored, and a needed air source can be selected to conduct inflation tasks through a mode of switching a plurality of air sources in an inflation system.

Description

Inflation terminal equipment and inflation system

Technical Field

The invention belongs to the technical field of inflation, and particularly relates to an inflation terminal device and an inflation system.

Background

In daily life, articles which are difficult to store in the air, such as foods, medicines, cultural relics and the like, are required to be stored in a manner of vacuumizing or filling inert gas. In some bottled beverage storage, for example, wine or sparkling wine, if drink after opening the bottle in time can influence the problem of taste, there is the gas that pours into the bottle in the bottle and does not react with the liquid in the bottle in the present market and stores or get liquid, including handheld inflation equipment and the external inflation mode of gas cylinder, handheld inflation equipment is limited by the size restriction of gas cylinder, can't satisfy the regular use demand, the external inflation mode of gas cylinder is general to be connected the trachea through the relief pressure valve that sets up in the gas cylinder oral area and to aerify the head, in use probably has the gas cylinder oral area relief pressure valve inefficacy or pressure too big to lead to getting into the dangerous condition such as bottle bursting or rushing out bottle plug from the atmospheric pressure in the bottle, and also user can't learn whether the inflation is accomplished.

Disclosure of Invention

In order to solve the above problems in the prior art, the present application provides an inflation terminal device and an inflation system, so as to solve the above technical drawbacks.

According to a first aspect of the present invention, there is provided an inflatable terminal device comprising: the pressure reducing valve assembly is arranged in the cavity in a sealing mode, the other end of the connecting portion is connected with an external air source, an air passage is arranged between two ends of the connecting portion, and a pressure detecting device communicated with the air passage is arranged on the connecting portion close to one side of the external air source. This aerify terminal equipment can be when the external air supply export gas gets into treat to aerify the piece and decompress once more through the relief pressure valve subassembly on this equipment, avoids the pressure too high, can also judge simultaneously according to pressure detection device and aerify whether work is accomplished, promotes the inflatable operation of inflatable security user more.

In some specific embodiments, the inflation head is of a trigger switch type structure, and comprises a valve core and a switch body, wherein the valve core is arranged in a cavity inside the switch body, and an air inlet channel of the cavity is opened when the valve core is in abutting press fit with a piece to be inflated, and the air inlet channel of the cavity is closed when the valve core is far away from the piece to be inflated. With this structure, the air charging step can be simplified without additionally controlling the opening of the air intake passage.

In some specific embodiments, the pressure reducing valve assembly comprises a pressure reducing valve and a control valve, the pressure reducing valve comprises a pressure reducing valve body, a piston seat, a piston and a spring, the pressure reducing valve body is in sealing connection with the cavity of the connecting portion, the piston seat and the piston are matched and arranged in the cavity inside the pressure reducing valve body, the spring is sleeved between the piston and the piston seat, and the control valve is arranged at the bottom of the pressure reducing valve. By means of the arrangement of the pressure reducing valve assembly and the control valve, stable and reliable output of the gas entering the to-be-inflated member through the inflation head can be ensured.

In some specific embodiments, the pressure relief hole communicated with the outside is formed in the pressure relief valve body and the connecting portion, and the lower end face of the piston can exceed the height of the pressure relief hole when the piston is subjected to the action of exceeding the preset pressure. By means of the arrangement, dangerous situations caused when the air pressure of an external air source entering the equipment is too high can be avoided, and the air with too high pressure can be discharged outwards in time through the pressure relief hole.

In some specific embodiments, a pressure-regulating knob is provided at an upper portion of the piston seat, and the piston seat is displaced in an axial direction thereof when the pressure-regulating knob is rotated to regulate a compression stroke of the spring. By means of the structure, the output gas pressure can be adjusted conveniently by a user, and the service performance of the inflation equipment is improved.

In some specific embodiments, the pressure reducing valve further comprises a shell, the shell comprises a two-part spliced shell structure, the pressure reducing valve assembly and the connecting part are fixedly arranged in an inner cavity formed by the two-part spliced shell structure, and the connecting part and the shell are further provided with a limiting groove and a corresponding limiting protrusion structure respectively. By virtue of the arrangement of the structure, the stability of the internal structure can be improved.

In some specific embodiments, one end of the connecting portion is connected to an external air source through an air pipe, and a spring wire harness or a protective sleeve is arranged outside the air pipe at one end of the connecting portion. By means of the structure, the influence of bending of the air pipe at the bottom on the inflation effect can be avoided.

In some specific embodiments, the pressure detection device comprises a pressure gauge, a display window of the pressure gauge is correspondingly arranged on the shell, and a pointer, a working area and an early warning area are arranged on the pressure gauge. By means of the device, a user can intuitively acquire the inflation state and the pressure condition of the air bottle.

In some specific embodiments, a pressure detection hole communicated with the air passage is radially formed in the connecting portion, and a detection head of the pressure gauge is in sealing fit with the pressure detection hole. By means of the arrangement, the pressure condition in the air passage can be accurately acquired.

According to a second aspect of the present invention, an inflation system is provided, comprising an inflation terminal device as described above, and further comprising at least one external air source, the external air source being connected to the inflation terminal device by an air tube. The inflation system can be connected with the inflation equipment by using an external air source to perform inflation operation on the piece to be inflated.

In some specific embodiments, the external air source comprises an air bottle and a pilot pressure reducing valve, the pilot pressure reducing valve is arranged at the mouth of the air bottle, the pilot pressure reducing valve is connected with one end of the connecting part through an air pipe, and the output air pressure of the pilot pressure reducing valve is greater than or equal to the air outlet pressure of the air charging terminal equipment. By means of the arrangement, the high-pressure gas of the gas cylinder can be preliminarily depressurized, and the excessive high pressure output to the inflation terminal equipment is avoided; meanwhile, in order to enable the inflation terminal equipment to work normally, the pressure value of the external air source is larger than or equal to the pressure value of the air outlet of the inflation terminal equipment under the action of the pilot pressure reducing valve.

In some embodiments, two different external air sources are included, the two different external air sources are connected with the input end of the three-way valve through an air pipe, and the output end of the three-way valve is connected with the connecting part of the air charging terminal equipment. By means of the arrangement, the corresponding gas cylinders can be selected for inflation operation according to different inflation gas requirements.

Compared with the prior art, the invention has the beneficial effects that:

according to the pressure reducing valve assembly, the pressure of the gas cylinder end is prevented from being too high or the pressure reducing valve at the gas cylinder end is prevented from being invalid or misoperation is prevented from causing too large air pressure in the gas cylinder end entering the gas cylinder through the pressure reducing valve assembly after the gas charging head, the pressure of the gas outlet of the terminal is kept, the safety is further improved through the arrangement of the pressure reducing hole, whether the gas charging work is finished or not can be judged according to the pressure detecting device, meanwhile, whether the input air pressure is in a normal working range or not can be monitored, and the gas charging operation of a user is facilitated. In the use of the inflation system, different gas cylinders can be connected by utilizing three-way valves according to different inflation demands, and proper gas cylinder output is selected according to the demands, so that the inflation terminal equipment is prevented from being frequently detached.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the invention. Many of the intended advantages of other embodiments and embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

Fig. 1 is a schematic structural view of an inflatable terminal apparatus according to a first embodiment of the present invention;

FIGS. 2a-2c are cross-sectional views of an inflatable termination device according to a first specific embodiment of the present invention;

FIG. 3 is a schematic view of the structure of an inflatable termination device according to a second specific embodiment of the present invention;

FIGS. 4a-4b are cross-sectional views of an inflatable termination device according to a second specific embodiment of the present invention;

FIG. 5 is a schematic surface view of a pressure gauge according to a specific embodiment of the invention;

FIG. 6 is a schematic structural view of an inflation system according to one embodiment of the present invention.

Meaning of each number in the figure: 100-inflation head, 101-first valve core, 102-switch body, 200-connecting portion, 300-relief valve, 301-relief valve body, 302-piston seat, 3021-pressure adjusting knob, 303-spring, 304-piston, 310-control valve, 311-second valve core, 312-valve core sealing member, 313-valve core spring, 314-switch valve seat, 400-housing, 500-pressure detection device, 600-spring wire harness, 700-gas pipe, 801-gas cylinder, 802-pilot relief valve, 900-three-way valve.

Detailed Description

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. For this, directional terms, such as "top", "bottom", "left", "right", "upper", "lower", and the like, are used with reference to the orientation of the described figures. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

The invention provides an inflation terminal device, fig. 1 shows a schematic structural diagram of the inflation terminal device according to the first embodiment of the invention, as shown in fig. 1, the inflation terminal device comprises an inflation head 100, a shell 400, a pressure detection device 500 and an air pipe 700, the inflation head 100 is arranged at the top of the shell 400, the pressure detection device 500 is arranged on the surface of the shell 400, the air pipe 700 is connected into the shell 400 from the bottom of the shell 400, a spring wire harness 600 is arranged at the connecting position, the air pipe at the connecting position is prevented from being bent, the air pipe is protected, the spring wire harness 600 can be replaced by a section of protection sleeve or other air pipe protection structures, and the protection of the air pipe at the connecting position is only satisfied. The shell 400 is formed by splicing two parts of shell structures, in this embodiment, a mode of splicing the left and right shells is adopted and the shells are fastened and matched through bolts, so that the fixation of the internal devices of the shells is facilitated.

The internal structure of the inflation terminal device according to the first specific embodiment of the present invention will be described below with reference to sectional views of the inflation terminal device shown in fig. 2a and 2 b:

the inflation head 100 comprises a first valve core 101 and a switch body 102, wherein a hollow conduction cavity is formed in the switch body 102, the first valve core 101 is movably arranged in the conduction cavity in the switch body 102, the conduction of the conduction cavity can be blocked when the first valve core 101 moves in the conduction cavity, the inflation head 100 can be used as a switch for controlling on-off when being used as an air outlet structure, and the inflation head is free from additionally operating a control switch during use, so that the inflation operation is simplified, and the inflation head is convenient to use.

The inside of this inflation terminal equipment is provided with connecting portion 200 and relief valve subassembly, wherein, the relief valve subassembly includes relief valve 300 and control valve 310, relief valve 300 includes relief valve body 301, piston seat 302, spring 303 and piston 304, the inside cavity that is provided with of relief valve body 301, wherein piston seat 302 and piston 304 are T shape structure, the head of piston seat 302 and the oral area of cavity pass through threaded connection's fastening cooperation and realize fixing, the lower part of piston seat 302 is provided with the through-hole of the lower part of holding piston 304, piston 304 inverts, its head sets up in the bottom of cavity, the lower part inserts in the lower part through-hole of piston seat 302 and with its sealing fit, spring 303 sets up in the cavity region between the head of piston seat 302 and the head of piston 304, press piston 304 to the bottom of cavity.

In a specific embodiment, the control valve 310 includes a second valve core 311, a valve core sealing member 312, a valve core spring 313 and a valve seat 314, the valve seat 314 is disposed at the bottom of the pressure reducing valve body 301, a through hole is formed in the middle of the valve seat 314, the valve core sealing member 206 is disposed above the valve seat 314 and has a smaller aperture than the middle through hole of the switch valve seat 314, the second valve core 311 is disposed inside the through hole, so that the second valve core 311 can move in the through hole, the second valve core 311 is in a cylindrical structure, an annular bulge is disposed near the bottom of the cylindrical structure, the aperture of the annular bulge is equal to that of the middle through hole of the valve seat 314, at least one notch is formed in the annular bulge, so as to ensure that the middle through hole of the valve seat 314 is always conducted, the bottom of the annular bulge is provided with a valve core spring 313, the bottom of the valve core spring 313 is in contact with the bottom of the inner through hole of the valve seat 312, the diameter of the upper part of the cylindrical structure of the second valve core 311 is slightly smaller than the lower part, the conical surface of the cylindrical structure of the second valve core 311 can be in contact with the conical surface of the middle of the valve seat 312, and the conical surface of the middle of the pressure reducing valve core 311 can be in contact with the inner cavity of the bottom of the valve body 301 through conical surface, and the diameter of the cylindrical structure is slightly smaller than the diameter of the cylindrical structure of the valve core 311 can be equal to the cylindrical structure between the valve core and the upper part and the valve core is slightly smaller than the cylindrical structure.

In a specific embodiment, an opening is formed in the lower cylinder of the piston 304 and is communicated to the head end face of the piston 304 through an inclined hole, a groove is formed in the head end face of the piston 304, the inclined hole is located on the end face of the groove at the head outlet of the piston 304, the inclined hole is used for avoiding a second valve core 311 extending out of the opening at the bottom of the cavity, the second valve core 311 is prevented from blocking a pipeline inside the piston 304, and the groove is arranged to prevent the inclined hole from being communicated with the opening at the bottom of the cavity when the piston 304 is pressed to the bottom of the cavity by the spring 303, so that normal air outlet cannot be caused. The arrangement of the grooves can also help to discharge residual pressure in the gas cylinder when the gas in the gas cylinder is about to run out and the piston is not lifted up.

In a specific embodiment, the connecting portion 200 is a cylindrical structure, one end of the connecting portion 200, which is close to the air charging head 100, has a larger diameter, the connecting portion at the position is provided with a cavity structure for accommodating the pressure reducing valve 300, the pressure reducing valve body 310 is in sealing fit with the cavity structure, the bottom of the cavity structure is further provided with a conical cavity structure for accommodating the control valve 310, the side wall of the cavity structure and the pressure reducing valve body 310 of the connecting portion is further provided with a pressure relief hole 201, the pressure relief hole 201 is located above the sealing fit position of the pressure reducing valve body 310 and the cavity structure, and is located above the sealing fit position of the piston 304 and the inner cavity of the pressure reducing valve body 310, when the air pressure of an external air source enters the device is too high, or other reasons cause the bottom control valve to stop failing to cause leakage, the lower end face of the piston 304 can exceed the height of the pressure relief hole 201 under the action of exceeding the preset pressure, and the gas with the excessive pressure can be discharged outwards in time through the pressure relief hole 201, so that the gas with the excessive pressure can be prevented from rushing into the to be inflated.

In a specific embodiment, the other end of the connection part 200 is used for connecting the air pipe 700, and the inside of the connection part 200 has an air passage communicating both ends. The air pipe 700 is connected with the bottom of the other end of the connecting portion 200 through an air pipe connector 701, specifically, the matching can be realized through a threaded connection mode, and meanwhile, a sealing structure (which can be a sealing gasket or a sealing ring) is also arranged at the matching position. And still be provided with the trachea protection architecture in the bottom of casing 400, the trachea protection architecture is fixed with the cladding of air pipe joint 701, prevents that junction from taking place deformation when using from leading to the circumstances of gas leakage, still is provided with spring harness 600 simultaneously, and on trachea protection architecture and trachea 700 were located to spring harness 600 cover, thereby prevent that the trachea of junction from appearing buckling when using from influencing the operation of aerifing. Alternatively, besides the above-mentioned tracheal protection structure, a section of protection sleeve can be directly arranged on the tracheal at the joint, so that the technical effect of the application can be realized.

In a specific embodiment, the inside of the casing 400 is provided with a plurality of limit protrusions according to the structures of the connecting portion 200 and the pressure reducing valve assembly, so that the connecting portion 200 and the pressure reducing valve are stably fixed inside the casing 400, preferably, a limit groove is further formed in the columnar surface of the connecting portion 200, the connecting portion 200 and the pressure reducing valve assembly are further fixed inside the casing 400 through the cooperation of the limit protrusions and the limit groove, and the influence of the inclination or the shaking of internal elements in the inflation process on the inflation effect is avoided.

In a specific embodiment, the pressure monitoring device 500 is disposed in an area between the connection portion of the pressure reducing valve assembly and the air pipe on the connection portion 200, and is used for detecting the pressure of the air entering the device, specifically, a pressure detection hole communicated with the output air passage is formed on the connection portion 200, and a detection head of the pressure monitoring device 500 is in sealing fit with the pressure detection hole, so as to read the pressure value in the air passage. When the device is connected with an external air source through the air pipe 700, the pressure monitoring device 500 displays an initial pressure value which is output by the external air source, when the device is matched with a piece to be inflated, for example, when the device is used for inflating sparkling wine, the air inlet channel is opened and communicated with the bottle at the moment of matching the inflatable bottle plug of the bottle mouth of the sparkling wine, the value of the pressure monitoring device 500 is instantly reduced, the air pressure in the bottle is gradually consistent with the air pressure of the pressure reducing valve along with the completion of the inflation process, the pressure reducing valve is closed at the moment, and the value of the pressure monitoring device 500 is gradually increased and stabilized at the initial pressure value in the process, so that whether the inflation is completed can be visually seen through the pressure monitoring device 500. In addition, if the residual air pressure of the external air source is insufficient or abnormally high, the pressure monitoring device 500 can visually learn the abnormal condition of the pressure of the external air source, and a user can visually learn the abnormal condition of the pressure of the external air source at this time to replace or maintain the external air source in time.

In another embodiment, the pressure monitoring device 500 may also be disposed in the area between the inflation head 100 and the pressure relief valve assembly, as shown in FIG. 2 c. In this embodiment, an adaptive structural adjustment needs to be performed on the connection portion, in this embodiment, the head portion of the piston seat of the pressure reducing valve extends to form an extension portion, an air passage output through the pressure reducing valve is formed inside the extension portion, the air charging head is connected with the end of the extension portion, a pressure detection hole communicated with the output air passage is formed in the middle of the extension portion, and the detection head of the pressure monitoring device 500 is in sealing fit with the pressure detection hole to read a pressure value in the air passage. The pressure monitoring device 500 is similar to the functions and effects of the previous embodiment, and can monitor the input/output pressure of the terminal device, and the pressure monitoring device 500 is smaller before the pressure reducing valve than after the pressure reducing valve, and can achieve the technical effects of the present application.

In a specific embodiment, the pressure monitoring device 500 may be a mechanical pointer pressure gauge or a digital pressure gauge, taking the mechanical pointer pressure gauge as an example, as shown in a surface schematic diagram of the pressure gauge according to a specific embodiment of the present invention shown in fig. 5, areas displaying different states, such as a green area a representing normal working pressure, a yellow area B representing insufficient pressure, a lack-pressure area C representing too low pressure, and an overpressure warning area D representing too high pressure, may be set on the pressure gauge, so that a user can intuitively learn about the pressure state, and in the normal state, when the device is connected to an external air source, the pointer is in the area a of normal working pressure, and when the inflation task is performed, the pressure value is instantaneously reduced in cooperation with an inflation channel of an inflatable member, and as the inflation process is completed, the pressure value gradually rises, the pointer is firstly dropped back to the area B on the pressure gauge, and as the inflation is completed, gradually returns to the area a of normal working pressure; meanwhile, the pressure condition of the external air source can be judged by observing the pressure output by the external air source by means of the pressure appearance, when the pressure of the external air source is insufficient, for example, the external air source needs to be replaced in time when the pressure gauge is lowered to the area C, and the pressure gauge is positioned in the area D to remind a user of checking and maintaining the external air source.

In a second embodiment of the present application, fig. 3 shows a schematic structural diagram of an inflation terminal device according to a second embodiment of the present invention, as shown in fig. 3, in which a pressure regulating function is added to the hand-held inflation device of the embodiment of the present invention based on the inflation terminal device of fig. 1-2, specifically by a pressure regulating knob 3021 in a pressure reducing valve 300, and the specific pressure regulating principle is described below in conjunction with the schematic sectional views of the inflation terminal device according to the second specific embodiment of the present invention shown in fig. 4 a-ab:

the overall pressure regulating principle of the inflatable terminal device is similar to that of the inflatable structure of the first embodiment, in this embodiment, the upper portion of the piston seat 302 of the pressure reducing valve 300 is set to be in the form of a pressure regulating knob 3021, and the pressure regulating knob 3021 is disposed outside the upper end of the housing 400, so that a user can control the up-down displacement of the piston seat 302 of the pressure reducing valve 300 by rotating the pressure regulating knob 3021 to further control the rotation of the piston seat 302 of the pressure reducing valve 300, and then adjust the compression stroke of the spring 303 in the pressure reducing valve 300, so as to realize the pressure regulation of the overall pressure reducing valve. The outer circumference surface of the pressure regulating knob 3021 is provided with anti-slip teeth, which is convenient for a user to rotate, in other embodiments, the pressure regulating knob 3021 can be further provided with a limiting structure for limiting the rotation range of the pressure regulating knob, so as to avoid the occurrence of the conditions of potential safety hazards and the use of the pressure regulating knob caused by excessive adjustment of misoperation.

In this embodiment, by adjusting the compression stroke of the compression knob 3021 to the spring 303, the pressure adjustment of the pressure reducing valve is achieved, and at the same time, fine adjustment of the predetermined pressure of the pressure releasing hole 201 can be achieved, so as to meet the requirements of different safety pressure thresholds of the to-be-inflated members, and further improve safety.

With continued reference to fig. 6, fig. 6 shows a schematic structural diagram of an inflation system according to an embodiment of the present invention, as shown in fig. 6, the inflation system includes at least 1 external air source, the external air source includes an air bottle 801 and a pilot pressure reducing valve 802, the pilot pressure reducing valve 802 is disposed at a mouth of the air bottle 801, the pilot pressure reducing valve 802 and the above-mentioned inflation terminal device are connected through an air pipe, the inflation terminal device performs an inflation operation on an object to be inflated, and it should be noted that an output air pressure of the air bottle 801 is set within a certain range under the action of the pilot pressure reducing valve 802, and the pressure value should be greater than or equal to a pressure of an air outlet of the inflation terminal device so as to ensure that the inflation terminal device can perform normal inflation. In this embodiment, 2 external air sources are taken as an example to illustrate, two external air sources are output through a pilot reducing valve, the input end of a three-way valve 900 is connected through an air pipe, the output end of the three-way valve 900 is connected with the above-mentioned air charging terminal equipment, air entering the air charging terminal equipment can be selected through the three-way valve 900, for example, the air source needing to be charged for wine is generally inert gas like that which does not react with the wine, the air source needing to be charged for beverages such as sparkling wine is carbon dioxide, and corresponding air cylinders can be selected for being charged according to different needs through controlling the three-way valve 900, so that the air pipe connection of the air charging terminal equipment and the air cylinders does not need to be replaced frequently, and the operation of a user is greatly facilitated.

The utility model provides an outside aeration equipment can be through the gas of preliminary decompression output at the outside air supply through this equipment when getting into to treat the inflatable member and decompress again and make the pressure of terminal gas outlet keep stable, can avoid the guide relief pressure valve inefficacy or the maloperation of gas cylinder end to make the high-pressure gas directly get into the dangerous condition that treat the inflatable member and take place, the inflatable terminal equipment of this application still in time discharges high-pressure gas through the relief hole under the circumstances that surpasss predetermined pressure through the setting of relief hole simultaneously, has further improved the security. In addition, whether the inflation work is finished or not and the monitoring of the normal working pressure range of an external air source can be judged according to the pressure detection device arranged on the connecting part, so that the inflation safety is improved, and the inflation operation of a user is facilitated. In the use of the inflation system, different gas cylinders can be connected by utilizing the three-way valve according to different inflation demands, and proper gas cylinder output is selected according to the demands, so that the inflation terminal equipment is prevented from being frequently detached, and the inflation operation of a user is greatly facilitated.

It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. In this manner, the invention is also intended to cover such modifications and variations as come within the scope of the appended claims and their equivalents. The word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (12)

1. An inflatable termination device, comprising: the pressure-reducing valve assembly is arranged in the cavity, the other end of the connecting portion is connected with an external air source, an air passage is arranged between the two ends of the connecting portion, and a pressure detection device communicated with the air passage is arranged on the connecting portion close to one side of the external air source.

2. The inflation terminal device according to claim 1, wherein the inflation head has a trigger switch structure, and comprises a valve core and a switch body, wherein the valve core is arranged in a cavity inside the switch body, and is made to open an air inlet channel of the cavity when the valve core is in press fit with a member to be inflated, and is made to close the air inlet channel of the cavity when the valve core is far away from the member to be inflated.

3. The inflation terminal device according to claim 1, wherein the pressure reducing valve assembly includes a pressure reducing valve including a pressure reducing valve body, a piston seat, a piston, and a spring, the pressure reducing valve body being sealingly connected with the cavity of the connecting portion, the piston seat and the piston being disposed in the cavity inside the pressure reducing valve body in cooperation, the spring being disposed between the piston and the piston seat in a sleeved manner, and the control valve being disposed at the bottom of the pressure reducing valve.

4. A gas charging terminal device according to claim 3, wherein the pressure reducing valve body and the connecting portion are provided with pressure relief holes communicating with the outside, and the lower end face of the piston exceeds the height of the pressure relief holes when the piston is subjected to a pressure exceeding a predetermined pressure.

5. A gas charging terminal device according to claim 3, wherein the upper portion of the piston seat is provided with a pressure adjusting knob which is displaced in the axial direction thereof when rotated to adjust the compression stroke of the spring.

6. The inflatable terminal device of claim 1, further comprising a housing, wherein the housing comprises a two-part splice-able housing structure, wherein the pressure relief valve assembly and the connecting portion are fixedly disposed in an internal cavity formed by the two-part splice-able housing structure, and wherein the connecting portion and the housing interior are further provided with a limit groove and a corresponding limit projection structure, respectively.

7. An inflatable termination according to claim 1, wherein one end of the connection portion is connected to the external air source via an air tube, and a spring harness or a protective sleeve is provided outside the air tube at one end of the connection portion.

8. The inflatable termination apparatus of claim 6, wherein the pressure detecting device comprises a pressure gauge, a display window of the pressure gauge is correspondingly arranged on the housing, and a pointer, a working area and an early warning area are arranged on the pressure gauge.

9. The inflation terminal device according to claim 8, wherein the connecting portion is radially provided with a pressure detecting hole communicated with the air passage, and the detecting head of the pressure gauge is in sealing engagement with the pressure detecting hole.

10. An inflation system comprising the inflation terminal device of any one of claims 1-9, and further comprising at least one external air source connected to the inflation terminal device by an air tube.

11. The inflation system of claim 10, wherein the external air source comprises a gas cylinder and a pilot pressure reducing valve, the pilot pressure reducing valve is arranged at the mouth of the gas cylinder, the pilot pressure reducing valve is connected with one end of the connecting portion through an air pipe, and the output air pressure of the pilot pressure reducing valve is greater than or equal to the air outlet pressure of the inflation terminal device.

12. An inflatable system according to claim 10, comprising two different external air sources connected by an air pipe to the input of a three-way valve, the output of the three-way valve being connected to the connection of the inflatable terminal device.

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