Fluid pressure stabilizing device

Abstract

The utility model provides a fluid pressure stabilizing device which mainly comprises a shell, the interior of the shell is of a hollow structure, and a first isolation piece and a second isolation piece which can be elastically deformed are arranged in the shell; the first separator and the second separator are arranged at an interval, so that at least a transmission cavity and an air pressure cavity are formed in the shell; wherein the first isolation piece forms a buffer part for relieving fluid impact force through elastic deformation in the transmission cavity, and the second isolation piece can be driven by pressure in the air pressure cavity to expand and deform in the direction of the transmission cavity so as to form a limiting part for limiting the maximum deformation scale of the buffer part; according to the fluid pressure stabilizing device, the technical problem that the first isolation piece cannot be recovered easily due to too large fluid pressure is solved, the situation that the first isolation piece exceeds the size where the material can bear the maximum elastic deformation and cannot be recovered can be avoided, the service life of the fluid pressure stabilizing device is effectively prolonged, and the purpose of protecting the fluid pressure stabilizing device is achieved. And leakage accidents caused by damage of the first isolation piece are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fluid pressure stabilizing equipment, and in particular to a fluid pressure stabilizing device. Background Art

[0002] The key process in the paint shop of the automotive industry is paint spraying. The paint fluid mainly comes from the paint mixing room. The stability of the paint fluid during spraying directly determines the quality of the sprayed paint film. Traditional paint pressure stabilization mainly relies on the nitrogen-filled pressure stabilizing tower at the paint supply end of the paint mixing room. The paint supply form is mainly a plunger pump. When the plunger pump is running and reversing, it will cause pressure fluctuations to the paint fluid. The vibration caused by this fluctuation cannot be completely eliminated by the pressure stabilizing tower. The paint fluid is a rigid medium. The vibration is transmitted to the spray terminal equipment through the paint, which is a damage to the equipment and atomizing spraying.

[0003] In the fluid pressure stabilizing device of the prior art, a diaphragm can be used as a buffer and control element to perform pressure stabilization, and the diaphragm is usually used to control the flow or pressure change of the gas. Its functions may include pressure regulation: the diaphragm, as a sensitive element, senses the pressure change in the system, and adjusts the position of the valve or other control elements by deformation, thereby controlling the gas inlet and outlet and the pressure level, ensuring the stable operation of the injection system; sealing and isolation: the diaphragm can be used as an airtight barrier to isolate different working chambers, prevent gas leakage while allowing pressure transmission, and ensure the accurate execution of the injection action; conversion signal: in some precision control systems, the diaphragm can convert the air pressure signal into mechanical movement, such as pushing the valve stem or triggering the switch, thereby controlling the action of the injection device, for example: starting, stopping or changing the injection rate; buffer energy storage: the diaphragm can also play the role of energy storage to a certain extent. When a large amount of gas is needed for injection in an instant, a certain pressure of energy is stored in advance and then released quickly. Combined with the above description, the diaphragm plays a key control and conversion role to meet the performance requirements under different working conditions.

[0004] However, there are still many defects in the existing pressure-stabilizing devices equipped with diaphragms. For example, when the diaphragm uses its own elastic deformation characteristics to buffer or sense pressure changes, it will be damaged when the air pressure or fluid pressure exceeds the upper limit of the diaphragm's elastic deformation, so that the diaphragm that is torn by pressure for a long time is prone to leakage accidents, causing unnecessary trouble. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a fluid pressure stabilizing device so that the first isolation member can serve as a limiting part for limiting the maximum expansion deformation scale of the first isolation member after the second isolation member expands and deforms, thereby solving the technical problem that the first isolation member is easily unable to recover due to excessive fluid pressure.

[0006] In order to solve the above technical problems, the following technical solutions are provided in the embodiments of the present application:

[0007] The present application provides a fluid pressure stabilizing device, which mainly comprises: a shell, the interior of which is a hollow structure, and a first isolating member and a second isolating member capable of elastic deformation are arranged in the shell; the first isolating member and the second isolating member are arranged at intervals to form at least a transmission cavity and a gas pressure cavity in the shell;

[0008] Among them, the first isolation member is elastically deformed in the transmission cavity to form a buffer part for alleviating fluid impact, and the second isolation member is driven by the pressure in the air pressure cavity to expand and deform toward the transmission cavity to form a limiting part for limiting the maximum deformation scale of the buffer part.

[0009] In some modified embodiments of the present application, an interlocking pin and an opening and closing joint connected to the transmission cavity are further provided in the housing; the interlocking pin passes through the transmission cavity and the air pressure cavity, and the end of the interlocking pin located in the transmission cavity is set as an abutment top, and the first isolating member and the second isolating member are respectively sleeved on the interlocking pin in a sealing manner; the opening and closing joint is fixedly installed on the housing, and the press switch on the opening and closing joint is arranged in the transmission cavity, and the press switch corresponds to the abutment top;

[0010] The second isolating member can drive the interlocking pin to apply a force to the opening and closing joint through elastic deformation, so as to trigger the press switch to adjust the flow opening of the opening and closing joint.

[0011] In some modified embodiments of the present application, the opening and closing joint includes a joint shell and a joint core configured in the joint shell; the joint shell is divided into a fixing part and a connecting part, the fixing part is embedded in the bottom of the shell near the transmission cavity, and is used to fix the joint shell; the connecting part is protrudingly arranged on the outside of the shell, and is used to connect the feeding pipe; the joint core includes a blocking piece and a sealing piece, the blocking piece is configured in the inner cavity of the joint shell, and the sealing piece is configured on the feed port of the joint shell near the transmission cavity, so that the inner cavity of the joint shell can be closed through the tight fit of the blocking piece and the sealing piece.

[0012] In some modified embodiments of the present application, the sealing member is composed of a ball and an elastic element supporting the ball; the ball is slidably installed in the inner cavity of the joint housing, and the ball is elastically supported at the feed port of the joint housing near the seal by the elastic element.

[0013] In some modified embodiments of the present application, a discharge channel connected to the transmission cavity is also provided in the shell; the discharge direction of the discharge channel is parallel or nearly parallel to the first isolation member, and a discharge port is formed in the shell; the feed port of the joint shell is opposite to the interlocking pin, and the feed direction of the transmission cavity is directed toward the first isolation member through the guidance of the interlocking pin.

[0014] In some modified implementations of the present application, an air inlet passage is further provided in the shell; the air inlet passage is communicated with the air pressure cavity, and an air inlet port for connecting to an air source device is formed on the shell.

[0015] In some modified embodiments of the present application, a monitoring cavity and an overflow channel are also provided in the shell; the monitoring cavity is enclosed by a first isolation member and a second isolation member, and is located between the transmission cavity and the air pressure cavity; the overflow channel is connected to the monitoring cavity, and an observation port is formed on the shell.

[0016] In some modified embodiments of the present application, the shell includes a base and a top cover fastened to the base through a hollow adapter gasket; a first isolation member is fixedly installed between the base and the adapter gasket to enclose an internal space of the base through the first isolation member to form a transmission cavity; a second isolation member is fixedly installed between the top cover and the side of the adapter gasket facing away from the first isolation member to enclose the internal space of the top cover through the second isolation member to form an air pressure cavity.

[0017] In some modified implementations of the present application, the first isolation member and the second isolation member jointly enclose the internal space of the adapter gasket to form a monitoring cavity.

[0018] In some modified embodiments of the present application, a discharge channel connected to the transmission cavity is opened on the side wall of the base; an air intake channel connected to the air pressure cavity is opened on the side wall of the top cover; and an overflow channel connected to the monitoring cavity is opened on the side wall of the adapter gasket.

[0019] Compared with the prior art, the fluid pressure stabilizing device provided in the present application delivers gas into the air pressure cavity to drive the second isolation member to expand and deform in the direction of the first isolation member, so as to serve as a limiting portion for limiting the maximum collision scale of the first isolation member. Since there can be flow through the first transmission cavity and the first isolation member is used as a buffer element, when the fluid hits the first isolation member, the first isolation member can expand and deform in the direction of the second isolation member until the first isolation member touches the second isolation member to reach the maximum expansion scale. This can prevent the first isolation member from exceeding the scale of the maximum elastic deformation that the material can withstand and causing irreversible damage, effectively improve the service life of the fluid pressure stabilizing device, achieve the purpose of protecting the fluid pressure stabilizing device, and reduce leakage accidents caused by damage to the first isolation member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0021] Figure 1The cross-sectional structural diagram of the fluid pressure stabilizing device in the embodiment of the present application is schematically shown.

[0022] Description of Figure Numbers:

[0023] 1. Shell; 11. Base; 12. Top cover; 13. Adapter gasket;

[0024] 101, transmission cavity; 102, air pressure cavity; 103, discharge channel; 104, air intake channel; 105, monitoring cavity; 106, overflow channel;

[0025] 2. Interlocking pin;

[0026] 3. a first isolating member;

[0027] 4. A second isolating member;

[0028] 5. Opening and closing joints;

[0029] 51. Joint shell; 52. Joint core; 521. Ball; 522. Elastic element. DETAILED DESCRIPTION

[0030] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments disclosed in the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0032] At present, from the perspective of market development, the demand for automobiles in daily life is also increasing. At the same time, the appearance of automobiles is also particularly important. The automobile painting process is a complex and sophisticated industrial process. It is one of the most important means to provide automobiles with beautiful appearance. The topcoat stage is the most direct part of improving the appearance of automobiles, including color paint and varnish. Color paint gives the car various colors, while varnish can provide gloss and wear resistance. At this stage, different spraying methods will be selected according to the configuration of the vehicle model, such as air spray gun spraying, high-pressure airless spraying or electrostatic spraying, etc., and leveling and high-temperature baking curing are also required afterwards.

[0033] The inventors of the present application have discovered that the traditional paint pressure stabilization, which relies on a nitrogen-filled pressure stabilization tower, cannot effectively eliminate the vibration of the paint medium, which is a rigid medium, caused by fluctuations. The use of a pressure stabilization device with a diaphragm as a buffer and control element can effectively solve the problem of paint vibration. However, due to the rigidity of the paint, the buffering strength required to be implemented is unnecessary and heavy, which can easily cause the diaphragm to be damaged due to high-intensity tensile deformation, leading to leakage accidents.

[0034] According to the above, a fluid pressure stabilizing device is proposed in the embodiment of the present application, which mainly includes: a shell 1, the interior of which is a hollow structure, and a first isolating member 3 and a second isolating member 4 capable of elastic deformation are arranged in the shell 1; the first isolating member 3 and the second isolating member 4 are arranged at intervals to form at least a transmission cavity 101 and a gas pressure cavity 102 in the shell 1;

[0035] Among them, the first isolation member 3 is elastically deformed in the transmission cavity 101 to form a buffer part for alleviating fluid impact, and the second isolation member 4 is driven by the pressure in the air pressure cavity 102 to expand and deform in the direction of the transmission cavity 101 to form a limiting part for limiting the maximum deformation scale of the buffer part.

[0036] Specifically, in the technical solution adopted by the present application, the interior of the housing 1 is set as a hollow structure, and is sealed and spaced by the first isolating member 3 and the second isolating member 4. Specifically, the first isolating member 3 and the second isolating member 4 can be arranged in a stacked manner in the internal space of the housing 1 to form a transmission cavity 101 on the side of the first isolating member 3 away from the second isolating member 4, and a gas pressure cavity 102 is formed on the side of the second isolating member 4 away from the first isolating member 3. The first isolating member 3 and the second isolating member 4 are preferably diaphragms, which are corrosion-resistant.

[0037] When in use, the transmission cavity 101 can be used to transport the paint medium, and the paint medium is buffered by the first isolation piece 3. It can be set to direct the feed port for transporting paint to the transmission cavity 101 toward the first isolation piece 3, so as to achieve the purpose of buffering the paint medium by the first isolation piece 3. The first isolation piece 3 specifically buffers the paint medium through its own elastic deformation. At the same time, high-pressure gas is injected into the air pressure cavity 102 to force the second isolation piece 4 to quickly expand and deform in the direction of the first isolation piece 3 until it contacts the first isolation piece 3. Therefore, during this operation, the expanded and deformed part of the second isolation piece 4 can serve as a limiter for the maximum deformation scale of the first isolation piece 3; it should be noted that the maximum deformation scale refers to the maximum deformation scale set artificially, rather than the maximum deformation scale that the material of the first isolation piece 3 itself can withstand, so as to achieve the maintenance of the service life of the first isolation piece 3 through the second isolation piece 4. The use of this structure can effectively improve the service life and significantly reduce leakage accidents caused by damage to the first isolation piece 3.

[0038] For further information, see Attachment Figure 1 In some embodiments, an interlocking pin 2 and an opening and closing joint 5 connected to the transmission cavity 101 are further provided in the housing 1; the interlocking pin 2 penetrates the transmission cavity 101 and the air pressure cavity 102, and the end of the interlocking pin 2 located in the transmission cavity 101 is set as the abutment top, and the first isolating member 3 and the second isolating member 4 are respectively sleeved on the interlocking pin 2 in a sealing manner; the opening and closing joint 5 is fixedly installed on the housing 1, and the press switch on the opening and closing joint 5 is arranged in the transmission cavity 101, and the press switch corresponds to the abutment top;

[0039] The second isolating member 4 can drive the interlocking pin 2 to apply a force to the opening and closing joint 5 through elastic deformation, so as to trigger the press switch to adjust the flow opening of the opening and closing joint 5.

[0040] Specifically, in the technical solution adopted in the present application, the interlocking pin 2 inside the shell 1 can use the pressure in the air pressure cavity as a driving force to trigger the opening and closing joint 5 in the transmission cavity 101. Specifically, the interlocking pin 2 is sealed and embedded in the first isolation member 3 and the second isolation member 4 in a press-fit manner, so that the interlocking pin 2 can move through the elastic deformation of the first isolation member 3 and the second isolation member 4. The top of the interlocking pin 2 is located in the transmission cavity 101 and corresponds to the press switch on the opening and closing joint 5. When high-pressure gas is injected into the air pressure cavity 102, the second isolation member 4 is elastically deformed, and the interlocking pin 2 can realize a downward pressing action until the press switch is triggered by the top, so that the paint medium enters the transmission cavity 101 through the opening and closing joint 5. In one embodiment, the depth of squeezing the press switch can determine the flow rate of the medium entering the transmission air 101, that is, the pressure in the air pressure cavity 102 can determine the downward pressure amplitude of the interlocking pin 2, and the downward pressure amplitude of the interlocking pin 2 can determine the flow opening of the opening and closing joint 5, thereby achieving precise control of the flow of the paint medium.

[0041] For further information, see Attachment Figure 1 In some embodiments, the opening and closing joint 5 includes a joint shell 51 and a joint core 52 configured in the joint shell 51; the joint shell 51 is divided into a fixing part and a connecting part, the fixing part is embedded in the bottom of the shell 1 close to the transmission cavity 101, and is used to fix the joint shell; the connecting part is protrudingly arranged on the outside of the shell 1, and is used to connect the feeding pipe; the joint core 52 includes a plugging part and a sealing part, the plugging part is configured in the inner cavity of the joint shell 51, and the sealing part is configured on the feed port of the joint shell 51 close to the transmission cavity 101, so that the inner cavity of the joint shell 51 can be closed through the close fit of the plugging part and the sealing part.

[0042] Specifically, in the technical solution adopted by the present application, the fixed part of the joint shell 51 can be embedded in the bottom of the shell 1 to fix the opening and closing joint 5, and the connecting part is protrudingly formed on the outside of the shell 1, so that it can be connected to the feeding pipe of the feeding equipment through the connecting part. The plugging member in the joint core 52 can selectively control the flow rate of the paint medium transported by the opening and closing joint 5 after cooperating with the sealing member; specifically, the inner cavity in the joint core 52 is set to a closing structure that gradually shrinks toward the transmission cavity 101, and the plugging member can close the port of the joint core 51 extending into the transmission cavity 101 through the sealing member, and when a gap is generated between the plugging member and the sealing member, the paint medium can enter the transmission cavity 101 through the opening and closing joint 5, and when the interlocking pin 2 increases the pressure in the air pressure cavity 102 to increase the downward pressure, it can drive the plugging member to move along the inner cavity of the joint core 52 in the direction away from the sealing member, so that the gap between the plugging member and the inner cavity of the joint core 52 can be increased, so that more paint medium can flow into the transmission cavity 101.

[0043] For further information, see Attachment Figure 1 In some embodiments, the sealing member is composed of a ball 521 and an elastic element 522 supporting the ball 521; the ball 521 is slidably installed in the inner cavity of the joint housing 51, and the ball 521 is elastically supported at the feed port of the joint housing 51 close to the seal by the elastic element 522.

[0044] Specifically, in the technical solution adopted in the present application, since the sealing member is set as a ball 521, the inner core side wall of the joint inner core 521 is set as an arc structure adapted to the ball 521 so that it can fit tightly, and the sealing member can be selected from a sealing ring that can be configured in the joint inner core 52. When the ball 521 is attached to the sealing ring through the elastic support of the elastic element 522, the opening and closing joint 5 can be closed to stop the conveying of the paint medium into the transmission cavity 101.

[0045] For further information, see Attachment Figure 1 In some embodiments, a discharge channel 103 connected to the transmission cavity 101 is further provided in the shell 1; the discharge direction of the discharge channel 103 is parallel or nearly parallel to the first isolation member 3, and a discharge port is formed in the shell 1; the feed port of the joint shell 51 is opposite to the interlocking pin 2, and the feed direction of the transmission cavity 101 is directed toward the first isolation member 3 through the guidance of the interlocking pin 2.

[0046] Specifically, in the technical solution adopted in the present application, the discharge channel 103 is used to discharge the paint medium in the transmission cavity 101. In order to cooperate with the first isolation piece 3 to buffer the paint medium, the discharge direction of the discharge channel 103 can be set to be parallel or nearly parallel to the first isolation piece 3, so that the discharge direction of the opening and closing joint 5 located at the bottom of the shell 1 can be toward the arrangement position of the first isolation piece 3. When the top of the interlocking pin 2 is pressed down to trigger the press switch, a guide channel can be reserved between the end of the opening and closing joint 5 and the top of the abutment. The guide channel can guide the paint medium to the side wall formed by the first isolation piece 3 in the transmission cavity 101, and the paint medium is discharged from the discharge port formed by the discharge channel 103 on the shell 1 after being buffered by the first isolation piece 3.

[0047] For further information, see Attachment Figure 1 In some embodiments, an air inlet passage 104 is further provided in the shell 1; the air inlet passage 104 is communicated with the air pressure cavity, and an air inlet for connecting to an air source device is formed on the shell 1.

[0048] For further information, see Attachment Figure 1 In some embodiments, a monitoring cavity 105 and an overflow channel 106 are further provided in the shell 1; the monitoring cavity 105 is enclosed by a first isolation member 3 and a second isolation member 4, and is located between the transmission cavity 101 and the air pressure cavity 102; the overflow channel 106 is connected to the monitoring cavity 105, and an observation port is formed on the shell 1.

[0049] For further information, see Attachment Figure 1 In some embodiments, the shell 1 includes a base 11 and a top cover 12 that is snapped onto the base 11 through a hollow adapter gasket 13; a first isolation member 3 is fixedly installed between the base 11 and the adapter gasket 13 to enclose the internal space of the base 11 through the first isolation member 3 to form a transmission cavity 101; a second isolation member 4 is fixedly installed between the top cover 12 and the side of the adapter gasket 13 facing away from the first isolation member 3 to enclose the internal space of the top cover 12 through the second isolation member 4 to form an air pressure cavity 102.

[0050] For further information, see Attachment Figure 1 In some embodiments, the first isolating member 3 and the second isolating member 4 jointly enclose the inner space of the adapter gasket 13 to form a monitoring cavity 105 .

[0051] For further information, see Attachment Figure 1 In some embodiments, a discharge channel 103 connected to the transmission cavity 101 is opened on the side wall of the base 11; an air inlet channel 104 connected to the air pressure cavity 102 is opened on the side wall of the top cover 12; and an overflow channel 106 connected to the monitoring cavity 105 is opened on the side wall of the adapter gasket 13.

[0052] Specifically, in the technical solution adopted by the present application, the base 11, the transfer gasket 13 and the top cover 12 are stacked and fixed by fasteners, and the first isolating member 3 is sealed and pressed together with the transfer gasket 13 through the base 11, and the second isolating member 4 is sealed and pressed together with the top cover 12 through the transfer gasket 13, so that a transmission cavity 101, an air pressure cavity 102 and a monitoring cavity 105 located between the transmission cavity 101 and the air pressure cavity 102 are formed in the shell 1. When the first isolating member 3 is damaged, the monitoring cavity 105 can store the paint medium leaked from the transmission cavity 101. In this embodiment, an overflow channel 106 connected to the monitoring cavity 105 is provided on the transfer gasket 13 to form an observation port on the shell 1. When the paint medium flows out of the observation port on the shell 1, it can be known that the first isolating member 3 is damaged, so as to achieve the purpose of discovering the damage and replacing the diaphragm in time.

[0053] It should be noted that in the description of this specification, the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application; the terms "connect", "install", "fixed", etc. should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fluid pressure stabilizing device, characterized in that: include: A shell (1) having a hollow structure inside, wherein a first isolating member (3) and a second isolating member (4) capable of elastic deformation are arranged inside the shell (1); The first isolating member (3) and the second isolating member (4) are arranged at intervals to form at least a transmission cavity (101) and a gas pressure cavity (102) in the housing (1); The first isolating member (3) is elastically deformed in the transmission cavity (101) to form a buffer portion for alleviating fluid impact, and the second isolating member (4) is driven by the pressure in the air pressure cavity (102) to expand and deform in the direction of the transmission cavity (101) to form a limiting portion for limiting the maximum deformation scale of the buffer portion.

2. The fluid pressure stabilizing device according to claim 1, characterized in that: The housing (1) is also provided with an interlocking pin (2) and an opening and closing joint (5) communicating with the transmission cavity (101); The interlocking pin (2) passes through the transmission cavity (101) and the air pressure cavity (102), and the end of the interlocking pin (2) located in the transmission cavity (101) is arranged to abut against the top, and the first isolating member (3) and the second isolating member (4) are respectively sleeved on the interlocking pin (2) in a sealing manner; The opening and closing joint (5) is fixedly mounted on the housing (1), and a push switch on the opening and closing joint (5) is arranged in the transmission cavity (101), and the push switch corresponds to the abutment top; The second isolating member (4) can drive the interlocking pin (2) to apply a force to the on-off joint (5) through elastic deformation, so as to trigger the push switch to adjust the flow opening of the on-off joint (5).

3. The fluid pressure stabilizing device according to claim 2, characterized in that: The opening and closing joint (5) comprises a joint outer shell (51) and a joint inner core (52) arranged in the joint outer shell (51); The joint shell (51) is divided into a fixing portion and a connecting portion, wherein the fixing portion is embedded in the bottom of the shell (1) close to the transmission cavity (101) and is used to fix the joint shell; the connecting portion is protruding from the outside of the shell (1) and is used to connect the feeding pipe; The joint inner core (52) includes a blocking piece and a sealing piece. The blocking piece is arranged in the inner cavity of the joint outer shell (51), and the sealing piece is arranged on the feed port of the joint outer shell (51) close to the transmission cavity (101), so that the inner cavity of the joint outer shell (51) can be closed through the tight fit between the blocking piece and the sealing piece.

4. The fluid pressure stabilizing device according to claim 3, characterized in that: The blocking member is composed of a ball (521) and an elastic element (522) supporting the ball (521); The ball (521) is slidably mounted in the inner cavity of the joint housing (51), and the ball (521) is elastically supported on the joint housing (51) near the feed port of the sealing member via the elastic element (522).

5. The fluid pressure stabilizing device according to claim 3, characterized in that: The housing (1) is also provided with a discharge channel (103) communicating with the transmission cavity (101); The discharge direction of the discharge channel (103) is parallel or nearly parallel to the first isolation member (3), and forms a discharge port on the housing (1); The feed port of the joint housing (51) faces the interlocking pin (2), and the feed direction of the transmission cavity (101) is directed toward the first isolating member (3) through the guidance of the interlocking pin (2).

6. The fluid pressure stabilizing device according to claim 1, characterized in that: The housing (1) is also provided with an air intake passage (104); The air inlet channel (104) is in communication with the air pressure cavity (102), and an air inlet for connecting to an air source device is formed on the housing (1).

7. The fluid pressure stabilizing device according to claim 1, characterized in that: The housing (1) is also provided with a monitoring cavity (105) and an overflow channel (106); The monitoring cavity (105) is formed by enclosing the first isolation member (3) and the second isolation member (4), and is located between the transmission cavity (101) and the air pressure cavity (102); The overflow channel (106) is in communication with the monitoring cavity (105), and an observation port is formed on the housing (1).

8. The fluid pressure stabilizing device according to claim 1, characterized in that: The housing (1) comprises a base (11) and a top cover (12) buckled onto the base (11) via a hollow adapter gasket (13); The first isolating member (3) is fixedly installed between the base (11) and the adapter gasket (13), so that the internal space of the base (11) is enclosed by the first isolating member (3) to form the transmission cavity (101); The second isolating member (4) is fixedly mounted between the top cover (12) and the side of the adapter gasket (13) facing away from the first isolating member (3), so that the internal space of the top cover (12) is enclosed by the second isolating member (4) to form the air pressure cavity (102).

9. The fluid pressure stabilizing device according to claim 8, characterized in that: The first isolating member (3) and the second isolating member (4) jointly enclose the internal space of the adapter gasket (13) to form a monitoring cavity (105).

10. The fluid pressure stabilizing device according to claim 9, characterized in that: A discharge channel (103) communicating with the transmission cavity (101) is provided on the side wall of the base (11); An air inlet passage (104) communicating with the air pressure cavity (102) is provided on the side wall of the top cover (12); The side wall of the adapter gasket (13) is provided with an overflow channel (106) communicating with the monitoring cavity (105).

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