CN117760801A - Gas taking connector and gas taking method - Google Patents

Abstract

The invention relates to the technical field of electrical equipment, and discloses an air taking connector and an air taking method. The air taking connector comprises an equipment connector, a pressure detection part, a connecting part and an air taking connector, wherein the equipment connector is provided with an air guide cavity, and a thimble is arranged in the air guide cavity; the gas taking connector comprises a connector body, an elastic piece and a diaphragm, wherein one end of the connector body is detachably connected with the equipment connector, the other end of the connector body is communicated with an external gas source, a containing cavity is formed in the connector body, the diaphragm is arranged in the containing cavity and sealed between the containing cavity and the gas guide cavity, the elastic piece is arranged in the containing cavity, one end of the elastic piece is propped against the surface of the diaphragm, the diaphragm can be elastically deformed and is configured to prop against the ejector pin, so that the ejector pin moves between a first position and a second position along the axial direction of the equipment connector, the air outlet of the high-voltage equipment is blocked by the ejector pin when the ejector pin is in the first position, and the gas guide cavity is communicated with the inside of the high-voltage equipment when the ejector pin is in the second position. The gas taking connector and the gas taking method can effectively prevent gas leakage and improve the working safety.

Description

Gas taking connector and gas taking method

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an air taking connector and an air taking method.

Background

With the development of electrical technology, many inflatable high-voltage devices are developed, sulfur hexafluoride gas is often filled in the inflatable high-voltage devices, and the high-voltage devices such as a high-voltage isolating switch are generally insulated by the sulfur hexafluoride gas. The gas is required to be taken regularly in the operation process of the inflatable high-voltage equipment, the decomposition component or micro water content of the sulfur hexafluoride gas is detected so as to judge the working state of the equipment, and when the sulfur hexafluoride gas in the high-voltage equipment is detected to be incapable of meeting the related standard requirements, the gas is required to be supplemented, inflated or the gas leakage point is required to be plugged in time.

At present, when the high-pressure equipment is subjected to gas taking, a traditional gas taking connector is generally used for being connected with the high-pressure equipment connector, and after the gas taking connector is connected to the high-pressure equipment connector, a thimble in the high-pressure equipment connector can be directly jacked up so as to open a gas outlet of the high-pressure equipment and finish gas taking operation. When the gas taking connector is unscrewed after gas taking is finished, the condition that the thimble cannot rebound and return to the original position possibly occurs, so that the gas outlet of the high-voltage equipment cannot be plugged, a large amount of sulfur hexafluoride gas in the high-voltage equipment is leaked, an emergency power failure event is caused, and potential safety hazards exist for operators.

Therefore, there is a need for an air-extracting connector and an air-extracting method to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide an air taking connector, which solves the problem that air leakage is caused by incapability of rebound and reset of a thimble after air taking of high-pressure equipment in the prior art.

The invention further aims to provide a gas taking method, which is realized by adopting the gas taking connector, so that the problem that in the prior art, after gas taking of high-pressure equipment, gas leakage is caused because the ejector pin cannot rebound and reset is solved.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an air taking connector, comprising:

the device connector is connected with high-voltage equipment, an air guide cavity is arranged in the device connector, and a thimble is arranged in the air guide cavity;

the pressure detection piece and the connecting piece are arranged on the equipment connector and are communicated with the air guide cavity, the pressure detection piece is used for detecting air pressure in the air guide cavity, and the connecting piece is used for outputting air in the high-pressure equipment; and

the air taking connector comprises a connector body, an elastic piece and a diaphragm, wherein one end of the connector body is detachably connected with the equipment connector, the other end of the connector body is communicated with an external air source, an accommodating cavity is formed in the connector body, the diaphragm is arranged in the accommodating cavity and sealed between the accommodating cavity and the air guide cavity, the elastic piece is arranged in the accommodating cavity, one end of the elastic piece is propped against the upper surface of the diaphragm, the diaphragm can be elastically deformed and is configured to prop against the thimble, so that the thimble moves between a first position and a second position along the axial direction of the equipment connector, when the thimble is in the first position, the air outlet of high-voltage equipment is blocked, and when the diaphragm is in the second position, the air guide cavity is communicated with the inside of the high-voltage equipment.

As an alternative scheme, be equipped with the arc arch on the diaphragm, the arc arch is followed the circumference of diaphragm encircles and sets up, the arc arch can with the thimble butt.

As an alternative, the diaphragm is made of rubber material.

As an alternative scheme, get gas joint still includes supporting component, supporting component is located hold the intracavity, supporting component includes locating part and bracing piece, the locating part set up in connect the inside wall of body and be located the top of diaphragm, the bracing piece wears to locate the locating part, the elastic component cover is located the bracing piece, just the one end butt of elastic component in the locating part, the other end butt in the diaphragm.

As an alternative scheme, the locating part orientation one side of diaphragm sets up annular spacing groove, the elastic component deviates from the one end holding of diaphragm in the spacing inslot and butt in the tank bottom of spacing groove.

As an alternative, the supporting rod includes a threaded portion, and the threaded portion penetrates through the limiting member and is in threaded connection with the limiting member.

As an alternative scheme, the supporting rod further comprises a limiting part, the limiting part is connected to the upper side of the threaded part, the outer diameter of the limiting part is larger than that of the threaded part, and the limiting part is abutted to one end face of the limiting part, which is away from the diaphragm.

As an alternative scheme, the top of the equipment joint is provided with external threads, the bottom of the joint body is provided with internal threads matched with the external threads, and the diaphragm is propped between the axial end faces of the equipment joint and the joint body.

As an alternative, the joint body includes:

the accommodating cavity is arranged in the cylinder, and the bottom end of the cylinder is detachably connected with the equipment connector;

the end cover is detachably buckled at the top end of the cylinder body;

the quick connector is connected to the top end of the end cover and is communicated with the accommodating cavity and the external air source.

The gas taking method is realized by adopting the gas taking connector of any one of the above steps, and comprises the following specific steps:

step S10: the air taking connector is arranged on the equipment connector, and in the installation process, the ejector pin upwards presses the diaphragm and compresses the elastic piece, and at the moment, the ejector pin is positioned at the first position;

step S20: filling air into the accommodating cavity through the external air source so as to gradually increase the air pressure in the accommodating cavity, and pushing the ejector pin to the second position by the diaphragm under the action of the air pressure and the elastic force of the elastic piece;

step S30: outputting the gas in the high-pressure equipment to a gas detection device or a storage device through the connecting piece;

step S40: after the gas taking is finished, completely exhausting the gas in the accommodating cavity, observing the pressure value detected by the pressure detection part, and if the pressure value gradually drops to zero, disassembling the gas taking connector; and if the pressure value does not drop, the gas taking joint is not disassembled.

The beneficial effects of the invention are as follows:

when the air taking connector is required to take air from the high-pressure equipment, the air taking connector is arranged on the equipment connector, in the installation process, the ejector pin upwards presses the diaphragm and compresses the elastic element, the elastic force of the elastic element acts on the ejector pin reversely through the diaphragm, but the elastic force of the elastic element is insufficient to push the ejector pin open, at the moment, the ejector pin is still located at the first position, namely the air outlet of the high-pressure equipment is still blocked by the ejector pin, and the high-pressure equipment cannot release air. Then, the air is filled into the accommodating cavity through an external air source, so that the air pressure in the accommodating cavity is gradually increased, the air pressure acts on the diaphragm to enable the diaphragm to elastically deform and act on the ejector pin, the ejector pin is pushed to a second position by the diaphragm under the action of the air pressure and the elastic force of the elastic piece, the air outlet of the high-pressure equipment is opened by the ejector pin, the air guide cavity is communicated with the inside of the high-pressure equipment, the high-pressure equipment releases air, and the released air enters the connecting piece through the air guide cavity and is then conveyed into the air detection device or the storage equipment, and meanwhile, the air pressure in the air guide cavity is detected by the pressure detection piece in real time. After the gas taking is finished, the gas in the accommodating cavity is completely discharged, the pressure value detected by the pressure detecting piece is observed, the ejector pin rebounds under normal conditions, the high-pressure equipment stops releasing the gas, the pressure value detected by the gas detecting piece can gradually drop to zero, and the gas taking connector is detached at the moment. However, when the thimble breaks down and does not rebound, the high-pressure equipment will release gas continuously, the pressure value that the gas detection piece detected will not decline, reminds operating personnel to do not get the dismantlement work of gas joint, gets the gas joint still and keeps connected state with the equipment joint, can prevent effectively that gas from leaking, improves the security of work.

The gas taking method provided by the invention can be used for effectively preventing the problem of gas leakage caused by incapability of rebound and reset of the ejector pin after gas taking of high-pressure equipment by adopting the gas taking connector.

Drawings

For a more obvious and understandable description of embodiments of the invention or solutions according to the prior art, reference will be made to the accompanying drawings, which are used in the description of the embodiments or the prior art and which are examples of the invention, and from which other drawings can be obtained without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an air intake connector according to an embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of an air intake connector provided by an embodiment of the present invention;

FIG. 3 is an axial cross-sectional view of an air intake fitting provided by an embodiment of the present invention;

FIG. 4 is a schematic view of a diaphragm according to an embodiment of the present invention;

fig. 5 is a specific flowchart of an air taking method according to an embodiment of the present invention.

In the figure:

10. a device connector; 11. an air guide chamber;

20. an air taking joint; 21. a joint body; 211. a receiving chamber; 212. a cylinder; 2121. an internal thread; 213. an end cap; 214. a quick connector; 22. an elastic member; 23. a diaphragm; 231. arc-shaped bulges; 24. a support assembly; 241. a limiting piece; 2411. a limit groove; 242. a support rod; 2421. a threaded portion; 2422. a limit part;

30. a pressure detecting member; 40. and a connecting piece.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a gas-taking connector for taking out sulfur hexafluoride gas in high-voltage equipment for detection. As shown in fig. 1 and 2, the air taking connector comprises an equipment connector 10, a pressure detecting member 30, a connecting member 40 and an air taking connector 20, wherein the equipment connector 10 is connected to high-pressure equipment, an air guide cavity 11 is arranged in the equipment connector 10, a thimble (not shown) is arranged in the air guide cavity 11 and used for blocking an air outlet of the high-pressure equipment, a thimble spring is further arranged in the air guide cavity 11, and the elastic force of the thimble spring can enable the thimble to block the air outlet of the high-pressure equipment. The gas taking connector 20 is detachably connected to the equipment connector 10, the gas taking connector 20 is used for pushing the ejector pin, so that the ejector pin is displaced to open a gas outlet of the high-pressure equipment, the gas guide cavity 11 is communicated with the inside of the high-pressure equipment, the high-pressure equipment releases gas, the released gas enters the connecting piece 40 through the gas guide cavity 11 and then is conveyed into the gas detection device or the storage equipment, and meanwhile the pressure detection piece 30 detects the gas pressure in the gas guide cavity 11 in real time.

In the process that the gas taking connector 20 is connected with the equipment connector 10 in the prior art, the gas taking connector 20 is contacted with the thimble and gradually pushes the thimble, the thimble is displaced, and meanwhile, the thimble spring is compressed, so that the gas guide cavity 11 is communicated with the inside of the high-pressure equipment, and the high-pressure equipment releases gas and completes gas taking detection work. When the gas taking is completed, the gas taking connector 20 is detached from the equipment connector 10, and under normal conditions, the gas taking connector 20 is separated from contact with the ejector pin in the detaching process, the ejector pin is reset by the elastic force of the ejector pin spring, and the gas outlet of the high-pressure equipment is blocked. However, in the actual operation process, due to the reasons such as failure of the elasticity of the thimble spring, the thimble can not normally reset, so that the air outlet of the high-pressure equipment can not be plugged in the process of disassembling the air taking connector 20, a large amount of sulfur hexafluoride gas in the high-pressure equipment is leaked, an emergency power failure event is caused, and potential safety hazards are also caused for operators.

In order to solve the above-mentioned problems, as shown in fig. 2 and 3, in the present embodiment, the gas taking connector 20 includes a connector body 21, an elastic member 22 and a diaphragm 23, one end of the connector body 21 is detachably connected to the device connector 10, the other end is communicated with an external gas source through a pipeline, a containing cavity 211 is provided in the connector body 21, the external gas source is used for filling gas into the containing cavity 211, the diaphragm 23 is fixed in the containing cavity 211 and sealed between the containing cavity 211 and the gas guiding cavity 11, so that the gas in the containing cavity 211 is not mixed with sulfur hexafluoride gas in the gas guiding cavity 11, the purity of the sulfur hexafluoride gas taken out from the gas guiding cavity 11 is ensured, and the accuracy of the detection result is ensured. The elastic member 22 is disposed in the accommodating cavity 211, one end of the elastic member abuts against the upper surface of the diaphragm 23, the diaphragm 23 is an elastic body, and therefore elastic deformation can occur, the diaphragm 23 is configured to abut against the ejector pin, so that the ejector pin moves along the axial direction of the device connector 10 between a first position and a second position, when in the first position, the ejector pin seals the air outlet of the high-pressure device, so that the high-pressure device cannot release air, and when in the second position, the ejector pin opens the air outlet of the high-pressure device, the air guide cavity 11 is communicated with the inside of the high-pressure device, so that the high-pressure device can release air into the air guide cavity 11.

Specifically, when air needs to be taken from the high-pressure device, the air taking connector 20 is installed on the device connector 10, in the installation process, the ejector pin is pressed against the diaphragm 23 upwards, so that the diaphragm 23 is inflated and deformed upwards and the elastic piece 22 is compressed, the elastic force of the elastic piece 22 acts on the ejector pin reversely through the diaphragm 23, but the elastic force of the elastic piece 22 is insufficient to push the ejector pin open, that is, the pressure exerted by the elastic piece 22 on the ejector pin is smaller than the pressure exerted by the ejector pin spring on the ejector pin, so that the ejector pin cannot be pushed open by the elastic piece 22, and at the moment, the ejector pin is still located at the first position, namely the air outlet of the high-pressure device is still blocked by the ejector pin, and the high-pressure device cannot release air. Then, air is filled into the accommodating cavity 211 through an external air source, so that the air pressure in the accommodating cavity 211 is gradually increased, the air pressure acts on the diaphragm 23, the diaphragm 23 is inflated downwards to deform and acts on the thimble, the sum of the air pressure and the pressure exerted by the elastic piece 22 on the thimble is larger than the pressure exerted by the thimble spring on the thimble, therefore, under the combined action of the air pressure and the elastic force of the elastic piece 22, the diaphragm 23 pushes the thimble downwards to a second position, the air outlet of the high-pressure equipment is opened by the thimble at the moment, the air guide cavity 11 is communicated with the inside of the high-pressure equipment, the high-pressure equipment releases air, and the released air enters the connecting piece 40 through the air guide cavity 11 and is conveyed into the air detection device or the storage equipment, and meanwhile, the pressure detection piece 30 detects the air pressure in the air guide cavity 11 in real time. In the process of releasing gas, the sum of the gas in the accommodating cavity 211 and the pressure applied by the elastic piece 22 to the diaphragm 23 is equal to the sum of the sulfur hexafluoride gas in the gas guide cavity 11 and the pressure applied by the thimble spring to the diaphragm 23, so that the diaphragm 23 reaches an equilibrium state to ensure stable gas taking.

After the gas taking is completed, the pipe connected to the external gas source is removed from the joint body 21, and the gas in the accommodating chamber 211 is completely discharged, and then the pressure value detected by the pressure detecting member 30 is observed. Normally, after the gas in the accommodating cavity 211 is exhausted, the pressure applied by the thimble spring to the thimble is greater than the pressure applied by the elastic element 22 to the thimble, the elasticity of the thimble spring enables the thimble to reset, the gas outlet of the high-pressure equipment is blocked, the high-pressure equipment stops releasing the gas, the pressure value detected by the pressure detecting element 30 can gradually drop to zero, and the gas taking connector 20 can be detached at the moment. However, when the ejector pin spring fails and does not rebound, the high-pressure equipment continuously releases gas, the pressure value detected by the pressure detection part 30 does not drop, so that an operator is reminded not to detach the gas taking connector 20, the gas taking connector 20 still keeps a connection state with the equipment connector 10, gas leakage can be effectively prevented, the high-pressure equipment is powered off by subsequent operators, and the safety of the work is improved by manual maintenance. In addition, since the high-voltage device is charged, in the whole gas taking process, besides the fact that the gas taking connector 20 is installed on the device connector 10 at the beginning, manual operation is needed, the subsequent gas charging into the accommodating cavity 211 and the detection result of the pressure detection part 30 can be remotely controlled, and therefore the gas taking connector can further improve the working safety of operators.

Preferably, the pressure detecting member 30 and the connecting member 40 are disposed opposite to each other on the surface of the device joint 10. Because the pressure detecting member 30 occupies a larger volume, the connecting member 40 is disposed opposite to the pressure detecting member 30, so that other devices can be less obstructed when connected with the connecting member 40, and the use is convenient. The pressure detecting member 30 and the connecting member 40 are connected to the device joint 10 by screwing, respectively. Specifically, the pressure detecting member 30 employs a pressure gauge.

Referring to fig. 3 and 4, the diaphragm 23 is disc-shaped, an arc-shaped protrusion 231 is provided on the diaphragm 23, the arc-shaped protrusion 231 is circumferentially arranged along the circumference of the diaphragm 23, and the arc-shaped protrusion 231 can be abutted with the ejector pin. It can be understood that if the diaphragm 23 is configured as a flat plate structure, after the ejector pin pushes against the diaphragm 23, the deformation stroke of the diaphragm 23 is only elastic deformation of the diaphragm, the deformation stroke is shorter, and the diaphragm 23 is easy to age and fail. In the state that the diaphragm 23 in fig. 3 is in a state of not contacting with the ejector pin, in combination with fig. 3, by arranging the arc-shaped bulge 231 on the diaphragm 23, after the ejector pin pushes up the arc-shaped bulge 231, the arc-shaped bulge 231 is extruded upwards to generate a certain degree of deformation, and then the diaphragm 23 itself is elastically deformed again, so that the deformation stroke of the diaphragm 23 can be increased by the arc-shaped bulge 231, the ageing of the diaphragm 23 is slowed down, and the service life of the diaphragm 23 is prolonged.

Preferably, the diaphragm 23 is made of rubber material. The rubber-made diaphragm 23 is easy to elastically deform, so that the diaphragm 23 can apply pressure to the thimble through the elastic deformation of the diaphragm 23 under the drive of external force, and the rubber-made diaphragm 23 has strong corrosion resistance and has better sealing effect between the accommodating cavity 211 and the air guide cavity 11.

Further, as shown in fig. 3, in the present embodiment, the elastic member 22 is a spring. The gas taking connector 20 further comprises a supporting component 24, the supporting component 24 is located in the accommodating cavity 211, the supporting component 24 comprises a limiting piece 241 and a supporting rod 242, the limiting piece 241 is arranged on the inner side wall of the connector body 21 and located above the diaphragm 23, the supporting rod 242 penetrates through the limiting piece 241, the elastic piece 22 is sleeved on the supporting rod 242, one end of the elastic piece 22 is abutted to the limiting piece 241, and the other end of the elastic piece 22 is abutted to the diaphragm 23. The stopper 241 can play a role of limiting the axial movement of the elastic member 22 so that the elastic member 22 can be compressed. The supporting rod 242 can support and guide the expansion and contraction of the elastic member 22, so that the elastic member 22 can only expand and contract along the extending direction of the supporting rod 242, and the elastic member 22 is prevented from being deviated.

Preferably, as shown in fig. 3, an annular limiting groove 2411 is disposed on a side of the limiting piece 241 facing the diaphragm 23, and one end of the elastic piece 22 facing away from the diaphragm 23 is accommodated in the limiting groove 2411 and abuts against a groove bottom of the limiting groove 2411. It will be appreciated that in order to facilitate the telescoping of the resilient member 22, the inner diameter of the resilient member 22 is greater than the outer diameter of the support rod 242, and therefore, a slight radial displacement of the resilient member 22 is unavoidable as it stretches in its axial direction. By providing the limiting groove 2411, not only the axial movement of the elastic member 22 can be limited, but also the limiting groove 2411 can limit the elastic member 22 to slightly move in the radial direction when the elastic member 22 stretches and contracts in the axial direction, thereby ensuring the uniformity of the force applied by the elastic member 22 to the diaphragm 23.

Specifically, as shown in fig. 3, the support rod 242 includes a threaded portion 2421, and the threaded portion 2421 is threaded through the stopper 241 and is screwed with the stopper 241. It will be appreciated that if the distance between the support rod 242 and the diaphragm 23 is too short, when the ejector pin presses the diaphragm 23 upward, the diaphragm 23 will contact with the support rod 242, thereby affecting the use of the gas-taking connector; if the distance between the support bar 242 and the diaphragm 23 is too far, the support guiding effect of the support bar 242 on the elastic member 22 is affected. Therefore, through the threaded fit between the support rod 242 and the limiting piece 241, the height position of the support rod 242 can be adjusted by screwing the support rod 242, and the support rod 242 can be adjusted to a proper height according to practical requirements, so that the operation is convenient.

Further, as shown in fig. 3, the support rod 242 further includes a limiting portion 2422, the limiting portion 2422 is connected to an upper side of the threaded portion 2421, an outer diameter of the limiting portion 2422 is larger than an outer diameter of the threaded portion 2421, and a lower surface of the limiting portion 2422 can abut against an end surface of the limiting member 241 facing away from the diaphragm 23. When the support bar 242 is screwed, the lower surface of the limiting part 2422 abuts against the upper surface of the limiting piece 241, that is, the height of the support bar 242 reaches the lowest adjustable position, and the operator can correspondingly adjust the height of the support bar 242 by taking the height as a reference.

As shown in fig. 2 and 3, the top end of the device connector 10 is provided with external threads, the bottom end of the connector body 21 is provided with internal threads 2121 matched with the external threads, and the device connector 10 and the connector body 21 are in sealing connection in a threaded connection mode. After the connector body 21 is screwed on the device connector 10, the diaphragm 23 is pressed between the device connector 10 and the axial end face of the connector body 21, so that the diaphragm 23 is stably sealed between the accommodating cavity 211 and the air guide cavity 11, the gas in the accommodating cavity 211 cannot be mixed with the sulfur hexafluoride gas in the air guide cavity 11, the purity of the sulfur hexafluoride gas taken out from the air guide cavity 11 is ensured, and the accuracy of a detection result is ensured.

Specifically, the connector body 21 includes a barrel 212, an end cover 213 and a quick connector 214, a receiving cavity 211 is provided in the barrel 212, the bottom end of the barrel 212 is detachably connected with the device connector 10, that is, the internal thread 2121 is provided at the bottom end of the barrel 212, the end cover 213 is detachably fastened at the top end of the barrel 212, the quick connector 214 is connected at the top end of the end cover 213, and the quick connector 214 is communicated with the receiving cavity 211 and an external air source. Specifically, the end cover 213 can be connected to the cylinder 212 through threads, so that the tightness of the threaded connection is good, the disassembly and assembly are convenient, and the installation of devices in the accommodating cavity 211 is convenient after the end cover 213 is opened. The quick connector 214 can be quickly inserted with a connector of an external pipeline so as to be quickly communicated with an external air source, so that the external air source can be conveniently filled with air into the accommodating cavity 211, and meanwhile, after air taking is finished, the quick connector 214 can be quickly detached from the connector of the external pipeline so that air in the accommodating cavity 211 can be conveniently discharged through the quick connector 214.

The external gas source is specifically a nitrogen gas source, that is, the gas that the external gas source charges into the accommodating chamber 211 is nitrogen gas. The chemical properties of nitrogen are stable, other substances are not easy to react, and the nitrogen is not easy to be influenced by environmental factors such as temperature, humidity and the like, so that stable pressure can be provided for the diaphragm 23.

As shown in fig. 5, this embodiment further provides an air taking method, which is implemented by adopting the air taking connector, and the specific steps include:

step S10: the air taking connector 20 is arranged on the equipment connector 10, and in the installation process, the ejector pin upwards presses the diaphragm 23 and compresses the elastic piece 22, and at the moment, the ejector pin is positioned at the first position;

step S20: air is filled into the accommodating cavity 211 through an external air source, so that the air pressure in the accommodating cavity 211 is gradually increased, and the ejector pin is ejected to the second position by the diaphragm 23 under the action of the air pressure and the elastic force of the elastic piece 22;

step S30: outputting the gas in the high-pressure device to a gas detection device or a storage device through a connecting piece 40;

step S40: after the gas taking is finished, the gas in the accommodating cavity 211 is completely discharged, the pressure value detected by the pressure detecting piece 30 is observed, and if the pressure value gradually drops to zero, the gas taking connector 20 is disassembled; if the pressure value does not drop, the gas-taking connector 20 is not detached.

Specifically, in step S10, when air needs to be taken from the high-pressure device, the air taking connector 20 is first installed on the device connector 10, and during the installation process, the ejector pin is pressed against the diaphragm 23 upward, so that the diaphragm 23 is inflated and deformed upward and the elastic member 22 is compressed, the elastic force of the elastic member 22 acts on the ejector pin in a reverse direction through the diaphragm 23, but the elastic force of the elastic member 22 is insufficient to push the ejector pin open, that is, the pressure exerted by the elastic member 22 on the ejector pin is smaller than the pressure exerted by the ejector pin spring on the ejector pin, so that the elastic member 22 cannot push the ejector pin open, and the ejector pin is still located at the first position, that is, the air outlet of the high-pressure device is still blocked by the ejector pin, and the high-pressure device cannot release air.

Then, in step S20, air is filled into the accommodating cavity 211 through an external air source, so that the air pressure in the accommodating cavity 211 is gradually increased, the air pressure acts on the diaphragm 23, the diaphragm 23 is deformed to bulge downwards and acts on the ejector pin, the sum of the air pressure and the pressure exerted by the elastic element 22 on the ejector pin is larger than the pressure exerted by the ejector pin spring on the ejector pin, therefore, under the combined action of the air pressure and the elastic force of the elastic element 22, the ejector pin is pushed downwards by the diaphragm 23 to the second position, and at the moment, the ejector pin opens the air outlet of the high-voltage equipment, the air guide cavity 11 is communicated with the inside of the high-voltage equipment, and the high-voltage equipment releases air.

In step S30, the gas released by the high-pressure device enters the connecting piece 40 through the gas guiding chamber 11 and then is conveyed to the gas detecting device for direct detection, or the released gas is conveyed into the storage device through the connecting piece 40, and after the gas is taken out, the storage device is transferred to the gas detecting device for detection. During the process of taking air, the pressure detecting member 30 detects the air pressure in the air guide chamber 11 in real time. It should be noted that, in the process of releasing gas, the sum of the pressure applied to the diaphragm 23 by the gas in the accommodating cavity 211 and the elastic member 22 is equal to the sum of the pressure applied to the diaphragm 23 by the sulfur hexafluoride gas in the gas guide cavity 11 and the ejector pin spring, so that the diaphragm 23 reaches an equilibrium state to ensure stable gas taking.

In step S40, after the gas taking is completed, the pipe connected to the external gas source is removed from the quick connector 214, and then the gas in the accommodating chamber 211 is completely discharged from the quick connector 214, and the pressure value detected by the pressure detecting member 30 is observed. Normally, after the gas in the accommodating cavity 211 is exhausted, the pressure applied by the thimble spring to the thimble is greater than the pressure applied by the elastic element 22 to the thimble, the elasticity of the thimble spring enables the thimble to reset, the gas outlet of the high-pressure equipment is blocked, the high-pressure equipment stops releasing the gas, the pressure value detected by the pressure detecting element 30 can gradually drop to zero, and the gas taking connector 20 can be detached at the moment. However, when the ejector pin spring fails and does not rebound, the high-pressure equipment continuously releases gas, and the pressure value detected by the pressure detection part 30 does not drop, so that an operator is reminded not to detach the gas taking connector 20, and the gas taking connector 20 still keeps a connection state with the equipment connector 10, so that the gas taking method can effectively prevent gas leakage, and the subsequent operator can power off the high-pressure equipment to manually overhaul, thereby improving the safety of the work.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (10)

1. An air taking connector, which is characterized by comprising:

the equipment connector (10) is connected with high-voltage equipment, an air guide cavity (11) is arranged in the equipment connector (10), and a thimble is arranged in the air guide cavity (11);

the pressure detection piece (30) and the connecting piece (40) are arranged on the equipment joint (10) and are communicated with the air guide cavity (11), the pressure detection piece (30) is used for detecting air pressure in the air guide cavity (11), and the connecting piece (40) is used for outputting air in the high-pressure equipment; and

get gas joint (20), including connect body (21), elastic component (22) and diaphragm (23), connect the one end of body (21) with equipment connects (10) and can dismantle the connection, the other end and outside air supply intercommunication, be equipped with in connecting body (21) and hold chamber (211), diaphragm (23) set up in hold chamber (211) and seal in hold chamber (211) with between air guide chamber (11), elastic component (22) are located hold chamber (211) and its one end support press in the upper surface of diaphragm (23), diaphragm (23) can take place elastic deformation and be configured to support the pressure the thimble, so that the thimble is followed the axial of equipment connects (10) is between first position and second position in first position, the thimble will the gas outlet shutoff of high-pressure equipment in the second position, air guide chamber (11) with high-pressure equipment inside intercommunication.

2. The gas-taking connector according to claim 1, wherein the diaphragm (23) is provided with an arc-shaped protrusion (231), the arc-shaped protrusion (231) is circumferentially arranged along the periphery of the diaphragm (23), and the arc-shaped protrusion (231) can be abutted with the thimble.

3. The gas-taking connector as claimed in claim 2, wherein the diaphragm (23) is made of rubber material.

4. A gas-taking connector according to any one of claims 1-3, wherein the gas-taking connector (20) further comprises a supporting component (24), the supporting component (24) is located in the accommodating cavity (211), the supporting component (24) comprises a limiting piece (241) and a supporting rod (242), the limiting piece (241) is arranged on the inner side wall of the connector body (21) and is located above the diaphragm (23), the supporting rod (242) is arranged on the limiting piece (241) in a penetrating manner, the elastic piece (22) is sleeved on the supporting rod (242), one end of the elastic piece (22) is abutted to the limiting piece (241), and the other end of the elastic piece is abutted to the diaphragm (23).

5. The gas-taking connector according to claim 4, wherein an annular limiting groove (2411) is formed in one side, facing the diaphragm (23), of the limiting piece (241), and one end, facing away from the diaphragm (23), of the elastic piece (22) is accommodated in the limiting groove (2411) and abuts against the groove bottom of the limiting groove (2411).

6. The gas extraction connector according to claim 4, wherein the support rod (242) comprises a threaded portion (2421), and the threaded portion (2421) is threaded through the limiting member (241) and is in threaded connection with the limiting member (241).

7. The gas-taking connector according to claim 6, wherein the supporting rod (242) further comprises a limiting portion (2422), the limiting portion (2422) is connected to the upper side of the threaded portion (2421), the outer diameter of the limiting portion (2422) is larger than the outer diameter of the threaded portion (2421), and the limiting portion (2422) abuts against an end face of the limiting piece (241) deviating from the diaphragm (23).

8. A gas extraction connector according to any one of claims 1-3, characterized in that the top end of the equipment connector (10) is provided with an external thread, the bottom end of the connector body (21) is provided with an internal thread (2121) matched with the external thread, and the diaphragm (23) is pressed between the equipment connector (10) and the axial end face of the connector body (21).

9. A gas-extracting joint according to any one of claims 1 to 3, wherein the joint body (21) comprises:

the barrel (212) is internally provided with the accommodating cavity (211), and the bottom end of the barrel (212) is detachably connected with the equipment joint (10);

the end cover (213) is detachably buckled on the top end of the cylinder (212);

and the quick connector (214) is connected to the top end of the end cover (213), and the quick connector (214) is communicated with the accommodating cavity (211) and the external air source.

10. An air taking method, characterized in that the air taking connector as defined in any one of claims 1 to 9 is adopted, and the specific steps include:

step S10: the air taking connector (20) is arranged on the equipment connector (10), and in the installation process, the ejector pin is upwards propped against the diaphragm (23) and compresses the elastic piece (22), and is positioned at the first position;

step S20: filling air into the accommodating cavity (211) through the external air source so as to gradually increase the air pressure in the accommodating cavity (211), and pushing the ejector pin to the second position by the diaphragm (23) under the action of the air pressure and the elastic force of the elastic piece (22);

step S30: outputting the gas in the high-pressure device to a gas detection device or a storage device through the connecting piece (40);

step S40: after the gas taking is finished, completely exhausting the gas in the accommodating cavity (211), observing the pressure value detected by the pressure detecting piece (30), and detaching the gas taking joint (20) if the pressure value gradually drops to zero; if the pressure value does not drop, the gas-taking joint (20) is not disassembled.