CN217056491U

CN217056491U - Connecting device and pressure reducing valve

Info

Publication number: CN217056491U
Application number: CN202123432789.2U
Authority: CN
Inventors: 姚标成; 邓显敏; 游锦堂; 麦广智
Original assignee: Changqing Thermal Energy Technology Zhongshan Co ltd
Current assignee: Changqing Thermal Energy Technology Zhongshan Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-26
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a connecting device and relief pressure valve, include: connector, suction nozzle, activity cap, regulating part and first elastic component. An air inlet channel is arranged in the connector, the air inlet nozzle is connected with the connector, the adjusting piece is arranged in the air inlet nozzle, and a second through hole is formed in the adjusting piece; the movable cap is movably arranged in the air inlet channel, and the adjusting piece can drive the movable cap to move so as to adjust a first elastic force of the first elastic piece acting on the movable cap and further change the starting pressure of the movable cap. Through above-mentioned structure and adopt foretell connecting device's relief pressure valve, if need the different performance of adaptation after the user equipment is accomplished, can directly pass the suction nozzle and adjust the regulating part without dismantling the regulation, change the opening position of activity cap to reach the required adaptation performance of user, the user of being convenient for carries out the secondary and adjusts, has improved the convenience of using.

Description

Connecting device and pressure reducing valve

Technical Field

The utility model relates to a gas valve technical field, in particular to connecting device and relief pressure valve.

Background

Along with the improvement of living standard, the use degree of the fuel gas in daily life is higher and higher. The gas is firstly reduced in pressure by a connecting device and a pressure reducing valve and then output to a gas appliance. The prior art connection requires that the degree of compression of the first spring be pre-adjusted prior to assembly and then the assembly is completed. If need the input gas of different performance of adaptation, the connecting device that the equipment was accomplished is not convenient for carry out the secondary control to first spring to current connecting device structure is long, and occupation space is great, consequently needs to improve current connecting device.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a connecting device.

The utility model discloses still provide a relief pressure valve that contains above-mentioned connecting device.

According to the utility model discloses a connecting device of first aspect embodiment includes: connector, suction nozzle, activity cap, regulating part and first elastic component. The connector is provided with an air inlet channel penetrating through the connector; the air inlet nozzle is connected with the connector, a first through hole is formed in the air inlet nozzle, and the first through hole is communicated with the air inlet channel; the movable cap is movably arranged in the air inlet channel, a gap is formed between the outer wall of the movable cap and the inner wall of the air inlet channel, and air can pass through the gap; the adjusting piece is adjustably connected with the air inlet nozzle and is positioned in the first through hole, the adjusting piece is provided with a second through hole, and the second through hole is communicated with the first through hole and the air inlet channel; the first elastic piece is arranged in the air inlet channel and can generate a first elastic force for driving the movable cap to abut against the second through hole, and the adjusting piece can drive the movable cap to move so as to adjust the first elastic force of the first elastic piece acting on the movable cap.

According to the utility model discloses connecting device has following beneficial effect at least: through above-mentioned structure, will the regulating part is integrated in the suction nozzle, if the input gas of the different performance of adaptation needs after connecting device assembles the completion, can need not dismantle the regulation, the user can directly pass the suction nozzle is adjusted the regulating part, and then adjusts the elasticity of first elastic component changes the preceding back pressure differential of activity cap to reach the required adaptation performance of user, the small and exquisite compactness of structure saves space, promotes user's use and experiences.

According to some embodiments of the invention, the movable cap is provided with an overflow trough, which is capable of guiding the gas flow direction.

According to some embodiments of the utility model, still include sealing mechanism, sealing mechanism includes sealing washer, ring channel and sealing, the ring channel set up in movable cap, the sealing washer sets up the ring channel, the sealing is located inlet channel's inner wall, the sealing washer can be followed movable cap removes extremely the sealing and with the sealing laminating is sealed inlet channel.

According to some embodiments of the utility model, be provided with air cavity and air vent in the movable cap, the air vent is located the inlet end of air cavity, the air vent intercommunication inlet channel with the air cavity, the end of giving vent to anger of air cavity with the inlet channel intercommunication, the cross-sectional area of air vent is less than the cross-sectional area of air cavity.

According to some embodiments of the utility model, first elastic component is first spring, be provided with the backstop platform on the movable cap, first spring setting is in the inlet channel, and with the backstop platform is connected.

According to some embodiments of the invention, the adjusting part is connected with the air inlet nozzle through a thread.

According to the utility model discloses a some embodiments still including being connected to the air supply of connector connects, the air supply connect with be provided with overheat protection mechanism between the connector, overheat protection mechanism can cut off when the high temperature the connector with the intercommunication that the air supply connects.

According to the utility model discloses a some embodiments, the connector activity is provided with the connecting piece, overheat protection mechanism includes: hot melt ring, case subassembly and second elastic component, the hot melt ring sets up the connecting piece with between the connector, case subassembly mobilizable set up in just can the shutoff in the air supply connects, the second elastic component sets up the case subassembly with between the air supply connects, just the second elastic component can produce one and order about the case subassembly shutoff the second elastic force that the air supply connects, the connecting piece is connected to the air supply connects and passes through the hot melt ring bulldozes the connector, the connector with the butt joint of air supply joint can promote the case subassembly removes to the position of opening the air supply and connecting.

According to some embodiments of the utility model, the case subassembly includes the valve plug and supports and push away the piece, it sets up to support to push away the piece activity the air supply joint, support push away piece one end with the valve plug is connected, the second elastic component set up in the air supply joint with support between the piece, second elastic force passes through support and push away the piece and act on the valve plug, the connector can bulldoze support and push away the piece with the drive the valve plug removes.

According to the utility model discloses relief pressure valve of second aspect embodiment, include the relief pressure valve main part and according to the utility model discloses the connecting device of above-mentioned first aspect embodiment, connecting device with the relief pressure valve main part is connected.

According to the utility model discloses relief pressure valve has following beneficial effect at least: through adopting foretell connecting device, the user uses when the different gas performance of relief pressure valve needs adaptation, the direct adjustment connecting device reaches required performance, avoids dismantling the regulation, has improved the convenience that the user used, reduces the regulation process, saves time and manpower.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an overall assembly diagram of a connection device and a pressure reducing valve according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of an integral assembly of the connection device and pressure relief valve of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of the connection device and the pressure reducing valve of FIG. 2 according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a movable cap of the connecting device of the embodiment of the invention;

fig. 5 is a schematic structural diagram of an overheat protection mechanism of a connection device according to an embodiment of the present invention.

Reference numerals are as follows:

the connecting joint 100, the air inlet passage 110, the sealing part 120, the abutting part 130, the air inlet nozzle 200, the first through hole 210, the movable cap 300, the overflow groove 310, the air chamber 320, the vent hole 330, the annular groove 340, the adjusting piece 400, the second through hole 410, the first spring 500, the stop table 510, the sealing ring 600, the connecting piece 700, the abutting surface 701, the air source joint 710, the hot melt ring 720, the valve plug 730, the second spring 740, the abutting part 750 and the pressure reducing valve main body 800.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 2, a connection device according to an embodiment of the first aspect of the present invention includes: the air inlet nozzle comprises a connecting head 100, an air inlet nozzle 200, a movable cap 300, an adjusting piece 400 and a first elastic piece. The connection head 100 is provided with an intake passage 110 penetrating the connection head 100. The intake nozzle 200 is connected to the connector 100, a first through hole 210 is disposed in the intake nozzle 200, and the first through hole 210 is communicated with the intake passage 110. The movable cap 300 is movably disposed in the air inlet passage 110, and a gap is formed between an outer wall of the movable cap 300 and an inner wall of the air inlet passage 110, and air can pass through the gap. The adjusting member 400 is adjustably connected to the intake nozzle 200 and is located in the first through hole 210, and the adjusting member 400 is provided with a second through hole 410. The second through hole 410 communicates with the first through hole 210 and the intake passage 110. The first elastic member is disposed in the air inlet passage 110 and is capable of generating a first elastic force for urging the movable cap 300 against the second through hole 410, and the adjusting member 400 is capable of driving the movable cap 300 to move so as to adjust the first elastic force applied to the movable cap 300 by the first elastic member.

Through the structure, with the regulating part integration in the suction nozzle 200, if the different pressure's of adaptation input gas is required after the connecting device equipment is accomplished, can need not dismantle the regulation, the user can directly pass suction nozzle 200 and adjust regulating part 400, and then adjusts the elasticity of first elastic component, changes the opening pressure of activity cap 300 to reach the required adaptation pressure of user, the small and exquisite compactness of structure saves space, promotes user's use and experiences.

Specifically, the utility model discloses a connecting device, include: the air inlet nozzle comprises a connecting head 100, an air inlet nozzle 200, a movable cap 300, an adjusting piece 400 and a first elastic piece. The suction nozzle 200 and the connector 100 are in threaded connection, so that a user can conveniently overhaul and replace the interior of the connecting device in the later stage. When the gas inlet nozzle is used, gas is input from the first through hole 210 of the gas inlet nozzle 200, flows through the second through hole 410 in the adjusting piece 400 to push away the movable cap 300, enters the gas inlet channel 110 in the connector 100, and flows to the gas outlet end of the connector 100. The adjusting member 400 is adjustably disposed in the intake nozzle 200, and the adjusting member 400 can drive the movable cap 300 to move so as to adjust a first elastic force of the first elastic member acting on the movable cap 300, that is, adjust the opening pressure of the movable cap 300, so as to adapt to input fuel gas with different pressures, thereby improving the adaptability.

It should be noted that, in the specific implementation process, the connection mode of the intake nozzle 200 and the connector 100 may be replaced by a plug-in type, and the intake nozzle 200 and the connector 100 are directly in interference fit, which mode is specifically selected, and is selected according to the actual needs of the user.

Referring to fig. 4, in some embodiments of the present invention, the movable cap 300 is provided with an overflow groove 310, and the overflow groove 310 can guide a gas flow direction.

Specifically, the inlet end of the movable cap 300 is provided with an overflow groove 310. The overflow launder is a cross-shaped tank. After flowing out through the second through hole 410 in the adjusting member 400, the fuel gas is guided through the overflow groove 310, so that vibration and noise generated when the fuel gas impacts the movable cap 300 can be reduced, and the stability of the movable cap 300 during operation can be improved.

It should be noted that, in a specific implementation process, the shape of the overflow groove 310 is not limited to a cross-shaped groove, and may also be a straight shape, and the specific shape is selected according to the user's requirement.

Referring to fig. 2 and 3, in some embodiments of the present invention, a sealing mechanism is further included, and the sealing mechanism includes a sealing ring 600, an annular groove 340, and a sealing portion 120. The annular groove 340 is provided in the movable cap 300, the sealing ring 600 is provided in the annular groove 340, and the sealing part 120 is located on the inner wall of the intake passage 110. The sealing ring 600 can follow the movable cap 300 to move to the sealing portion 120 and seal the air inlet passage 110 in conformity with the sealing portion 120. Through above-mentioned structure, when the input gas flow is too big, sealing mechanism can cut off the gas circulation, realizes the overcurrent protection function.

Specifically, when the user used, if when the too big condition of output gas flow appeared, the gas of excess can promote movable cap 300 and remove to the end of giving vent to anger of connector, when movable cap 300's sealing washer 600 removed to sealing 120 department, sealing washer 600 can closely laminate with sealing 120, cut the gas circulation.

It should be noted that, in a specific implementation process, the sealing ring 600 may be disposed on the air intake passage of the connector 100, and the sealing portion 120 is disposed on the movable cap 300, which is specifically selected and selected according to the actual situation.

Referring to fig. 2 and 3, in a further embodiment of the present invention, an air chamber 320 and a vent hole 330 are provided in the movable cap 300. The vent hole 330 is located at the air intake end of the air chamber 320, and the vent hole 330 communicates the air intake passage 110 with the air chamber 320. The air outlet end of the air chamber 320 communicates with the air inlet passage 110. The cross-sectional area of the vent hole 330 is smaller than that of the air chamber 320. The vent hole 330 and the air cavity 320 have the function of balancing the pressure of the gas inside and outside the movable cap 300, so that when the input gas overflows, the gas inlet end of the movable cap 300 is prevented from being always kept in a high-pressure state, and the safety performance of the connecting device is improved.

Specifically, the cross-sectional area of the vent hole 330 is one tenth of the cross-sectional area of the air chamber 320. When the movable cap 300 is in the sealed state, a small amount of gas can pass through the vent hole 330, and the gas flows into the gas cavity 320 through the vent hole 330 and finally flows to the gas outlet of the connector 100. The vent 330 can balance the gas pressure, and after a period of time, when the gas pressure inside and outside the movable cap 300 tends to be balanced, the first elastic member can reset the movable cap 300 to reopen the air inlet passage 110.

Referring to fig. 2, in some embodiments of the present invention, the first elastic member is a first spring 500, a stop table 510 is disposed on the movable cap 300, and the first spring 500 is disposed in the intake passage 110 and connected to the stop table 510. The first elastic member can adjust the position of the movable cap 300 in cooperation with the adjusting member 400 and can reset the movable cap 300 in cooperation with the vent hole 330 and the air chamber 320 after the movable cap 300 is in a sealed state for a period of time.

Specifically, the movable cap 300 is provided with a stopper table 510. The first spring 500 has a section sleeved on the movable cap 300 and abutting against the stop table 510, and the other end of the first spring 500 abuts against the inside of the connector 100.

It should be noted that, in the specific implementation process, the first elastic element may also be an elastic membrane, two ends of the elastic membrane are respectively connected with the movable cap 300 and the inner wall of the air inlet channel 110, and the elastic force of the elastic membrane is utilized to realize the reset function.

Referring to fig. 2, in some embodiments of the present invention, the adjusting member 400 is threadedly coupled to the nozzle 200. Through the screw thread regulation, can realize infinitely variable control, the user adaptation of being convenient for uses different performance.

Specifically, the adjusting member 400 is an adjusting nut screwed into the first through hole 210 in the intake nozzle 200, and a user can adjust the open position of the movable cap 300 by rotating the adjusting nut.

It should be noted that, in the specific implementation process, the adjusting member 400 may further implement an adjusting function through the cooperation of the latch and the rack, specifically select which adjusting manner to use, and determine according to the actual needs of the user.

Referring to fig. 5, in some embodiments of the present invention, the present invention further includes an air source connector 710 capable of being connected to the connector 100, an overheat protection mechanism is disposed between the air source connector 710 and the connector 100, and the overheat protection mechanism is capable of cutting off the communication between the connector 100 and the air source connector 710 when the temperature is too high.

Specifically, the air supply connector 710 is in threaded connection with the connector 100, and the overheat protection mechanism is disposed between the air supply connector 710 and the connector 100. When a user uses the gas source connector 710, the connector 100 is communicated with the gas source connector 710, when an emergency occurs, such as a pipeline is leaked and catches fire or a fire occurs due to improper use, the overheating protection mechanism can timely disconnect the connector 100 from the gas source connector 710, the gas supply is cut off, and the time for disposing a dangerous case or escaping is increased for the user.

Referring to fig. 5, in some embodiments of the present invention, the connection head 100 is movably provided with a connection member 700, and the overheat protection mechanism includes: hot melt ring 720, case subassembly and second elastic component, hot melt ring 720 sets up between connecting piece 700 and connector 100, case subassembly mobilizable setting in air supply joint 710 and can shutoff air supply joint 710, the second elastic component sets up between case subassembly and air supply joint 710, and the second elastic component can produce one and order about the second elastic force that case subassembly shutoff air supply joint 710, connecting piece 700 is connected to air supply joint 710 and bulldozes connector 100 through hot melt ring 720, connector 100 and air supply joint 710 dock and can promote the case subassembly and remove to the position of opening air supply joint 710. When the ambient temperature is too high, the heat-fusible ring 720 can be melted, so that a gap is formed between the connector 100 and the connector 700, so that the second elastic member pushes the valve core assembly to the blocking position to block the air source connector 710.

Specifically, the heat fusible ring 720 is disposed between the connection member 700 and the connection head 100. The connecting head 100 is provided with an abutting portion 130, the connecting member 700 is provided with an abutting surface 701, and the heat fusible ring 720 is disposed between the abutting portion 130 and the abutting surface 701. The valve core assembly is movably disposed in the air supply connector 710. The second elastic member is a second spring 740. The second spring 740 is capable of generating a second resilient force that urges the valve cartridge assembly to block the air supply connector 710. When the user uses, bulldoze hot melt ring 720 and connector 100 and be connected with air supply connector 710 through rotating connecting piece 700, connector 100 can open the case subassembly so that the gas circulation. If an emergency occurs, if a fire occurs due to improper fire, the hot melt ring 720 can be rapidly melted to form a gap between the connector 100 and the connecting member 700, the second elastic member can support and push the valve core assembly to enable the connector 100 to exit the air source connector 710, and the valve core assembly can plug the air source connector 710 to block the input of fuel gas, so that the effect of relieving the fire is achieved, and precious disposal escape time is provided for a user.

It should be noted that, in the specific implementation process, the second spring 740 can be replaced by a structure having a resilient force, such as a tension spring, an elastic diaphragm, etc., so as to realize the function of pushing the valve core assembly to the blocking position to block the fuel gas when overheating occurs, and which structure is specifically selected and selected according to the actual needs of customers.

Referring to fig. 5, in some embodiments of the present invention, the valve core assembly includes a valve plug 730 and a pushing member 750, the pushing member 750 is movably disposed on the air source connector 710, one end of the pushing member 750 is connected to the valve plug 730, the second elastic member is disposed between the air source connector 710 and the pushing member 750, the second elastic force acts on the valve plug 730 through the pushing member 750, and the connector 100 can push and push the pushing member 750 to drive the valve plug 730 to move.

Specifically, the valve core assembly includes a valve plug 730 and a pushing member 750, the pushing member 750 is movably disposed in the air source connector 710, one end of the pushing member 750 is connected to the valve plug 730, the second elastic member is disposed between the air source connector 710 and the pushing member 750, and the second elastic force acts on the valve plug 730 through the pushing member 750. When the user uses the plug connector 700, the connector 100 is pushed by the pushing member 750 by rotating the connecting member 700, so as to push the plug 730 to be located at the open position, and the second elastic member generates a second elastic force for driving the plug 730 to move toward the blocking position. When a fire occurs, the heat-melting ring 720 melts, so that a gap is formed between the connector 100 and the connector 700, and the second elastic member can push the abutting member 750 and the connector 100, so that the valve plug 730 moves to the blocking position to block the gas, thereby performing an overheat protection function.

Referring to fig. 1 and 2, a pressure reducing valve according to an embodiment of the present invention includes a pressure reducing valve main body 800 and a connecting device according to an embodiment of the present invention, the connecting device is connected to the pressure reducing valve main body 800.

Specifically, connecting device and relief pressure valve main part 800 pass through threaded connection to through adopting foretell connecting device, when the user used the different gas performance of relief pressure valve needs the adaptation, directly adjust connecting device and reach required open position, avoid dismantling the regulation, improved the convenience that the user used, reduce and adjust the process, save time and manpower.

It should be noted that, in the specific implementation process, the connection device may also be integrally formed with the pressure reducing valve main body 800, or the connection device may also be connected, clamped or riveted to the pressure reducing valve main body 800 through a pagoda-shaped joint.

In the description of the present specification, if reference is made to "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" and "some examples" or the like, this means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A connection device, comprising:

the connector comprises a connector (100), wherein the connector (100) is provided with an air inlet channel (110) penetrating through the connector (100);

the air inlet nozzle (200), the air inlet nozzle (200) is connected with the connector (100), a first through hole (210) is formed in the air inlet nozzle (200), and the first through hole (210) is communicated with the air inlet channel (110);

the movable cap (300) is movably arranged in the air inlet channel (110), a gap is formed between the outer wall of the movable cap (300) and the inner wall of the air inlet channel (110), and gas can pass through the gap;

the adjusting piece (400), the adjusting piece (400) is adjustably connected with the air inlet nozzle (200) and is positioned in the first through hole (210), the adjusting piece (400) is provided with a second through hole (410), and the second through hole (410) is communicated with the first through hole (210) and the air inlet channel (110);

the first elastic piece is arranged in the air inlet channel (110) and can generate a first elastic force for driving the movable cap (300) to be pressed against the second through hole (410), and the adjusting piece (400) can drive the movable cap (300) to move so as to adjust the first elastic force of the first elastic piece acting on the movable cap (300).

2. A connecting device according to claim 1, characterized in that said movable cap (300) is provided with an overflow channel (310), said overflow channel (310) being capable of guiding the gas flow.

3. A connecting device according to claim 1, further comprising a sealing mechanism, wherein the sealing mechanism comprises a sealing ring (600), an annular groove (340) and a sealing portion (120), the annular groove (340) is disposed on the movable cap (300), the sealing ring (600) is disposed on the annular groove (340), the sealing portion (120) is located on the inner wall of the air inlet passage (110), and the sealing ring (600) can move to the sealing portion (120) along with the movable cap (300) and can be attached to the sealing portion (120) to seal the air inlet passage (110).

4. A connecting device according to claim 3, wherein an air chamber (320) and a vent hole (330) are provided in the movable cap (300), the vent hole (330) is located at an air inlet end of the air chamber (320), the vent hole (330) communicates the air inlet channel (110) and the air chamber (320), an air outlet end of the air chamber (320) communicates with the air inlet channel (110), and a cross-sectional area of the vent hole (330) is smaller than a cross-sectional area of the air chamber (320).

5. A coupling device according to claim 1, wherein said first elastic member is a first spring (500), said movable cap (300) is provided with a stop (510), and said first spring (500) is disposed in said air intake passage (110) and is coupled to said stop (510).

6. A coupling device according to claim 1, wherein the adjustment member (400) is screw-coupled to the inlet nozzle (200).

7. A connecting device according to claim 1, further comprising an air source connector (710) capable of being connected to the connector (100), wherein an overheat protection mechanism is disposed between the air source connector (710) and the connector (100), and the overheat protection mechanism is capable of cutting off the connection between the connector (100) and the air source connector (710) when the temperature is too high.

8. A connecting device according to claim 7, characterised in that the connecting head (100) is movably provided with a connecting piece (700), and the overheat protection means comprises: hot melt ring (720), case subassembly and second elastic component, hot melt ring (720) set up connecting piece (700) with between connector (100), case subassembly movably set up in air supply joint (710) and can the shutoff air supply joint (710), the second elastic component sets up the case subassembly with between the air supply joint (710), just the second elastic component can produce one and order about the shutoff of case subassembly the second elastic force of air supply joint (710), connecting piece (700) are connected to air supply joint (710) and through hot melt ring (720) bulldoze connector (100), connector (100) with air supply joint (710) butt joint can promote the case subassembly removes to the position of opening air supply joint (710).

9. A connecting device according to claim 8, wherein the valve core assembly includes a valve plug (730) and an abutting member (750), the abutting member (750) is movably disposed on the air source joint (710), one end of the abutting member (750) is connected to the valve plug (730), the second elastic member is disposed between the air source joint (710) and the abutting member (750), the second elastic force acts on the valve plug (730) through the abutting member (750), and the connecting head (100) can push the abutting member (750) to drive the valve plug (730) to move.

10. A pressure reducing valve comprising a pressure reducing valve body (800) and a connection device according to any one of claims 1 to 9, said connection device being connected to said pressure reducing valve body (800).