CN215673884U - Sealing joint and sulfur hexafluoride gas valve with same - Google Patents

Abstract

The application relates to a sealing joint and a sulfur hexafluoride gas valve with the sealing joint, which relate to the field of gas valves and comprise a joint component, wherein the joint component comprises a first joint and a second joint, and the first joint and the second joint are detachably connected and communicated with each other; one of two side walls at the position where the first joint is communicated with the second joint is provided with a first sealing groove, and the other side wall is provided with a first sealing ring which is used for being abutted against the inner wall of the first sealing groove; and a second sealing ring is arranged in the first sealing groove, a second sealing groove is formed in the first sealing ring, and the second sealing ring is used for being abutted against the inner wall of the second sealing groove. This application has the better effect of sealed effect between messenger's instrument and valve.

Description

Sealing joint and sulfur hexafluoride gas valve with same

Technical Field

The application relates to the field of gas valves, in particular to a sealing joint and a sulfur hexafluoride gas valve with the same.

Background

The sulfur hexafluoride gas is an inert gas with good arc extinguishing performance and is widely applied in the industries of power transmission and transformation and high-voltage electrical appliances; in actual production operation, the state of sulfur hexafluoride gas in a high-voltage electrical appliance needs to be accurately monitored in real time, when the state of the sulfur hexafluoride gas changes, corresponding gas charging and supplementing operations need to be carried out in time, and meanwhile, instruments used for detection need to be checked regularly.

In the related technology, a worker can be connected with an equipment body through a sulfur hexafluoride gas valve, a pressure gauge is mounted on the gas valve through a connector assembly, the connector assembly comprises two connectors, one connector is connected and communicated with the gas valve, the other connector is connected and communicated with an instrument through threads, the two connectors are connected with each other, and the instrument measurement is inaccurate due to gas leakage, so that good gas tightness is required between the instrument and the valve; in the related art, at the position where two joints are connected with each other, one joint is provided with a ring groove, the other joint is provided with a ring-shaped bulge, and the two joints are sealed by compressing the ring groove and the ring-shaped bulge.

In view of the above-mentioned related art, the inventor believes that, in actual use, two joints respectively connected with a gas valve and an instrument may loosen, and sealing only by a set of ring grooves and protrusions may cause air leakage, so that the sealing effect between the instrument and the valve is poor.

SUMMERY OF THE UTILITY MODEL

In order to enable the sealing effect between the instrument and the valve to be better, the application provides a sealing joint and a sulfur hexafluoride gas valve with the sealing joint.

The application provides a sealing joint and have sealing joint's sulfur hexafluoride gas valve adopts following technical scheme:

in a first aspect, the present application provides a sealing joint, which adopts the following technical scheme:

a sealing joint comprises a joint assembly, wherein the joint assembly comprises a first joint and a second joint, and the first joint and the second joint are detachably connected and are communicated with each other; one of two side walls at the position where the first joint is communicated with the second joint is provided with a first sealing groove, and the other side wall is provided with a first sealing ring which is used for being abutted against the inner wall of the first sealing groove; and a second sealing ring is arranged in the first sealing groove, a second sealing groove is formed in the first sealing ring, and the second sealing ring is used for being abutted against the inner wall of the second sealing groove.

By adopting the technical scheme, the interface of the instrument and the interface of the valve cannot be directly matched for use, so that the connection between the instrument and the valve needs to be realized through the joint assembly, and the first joint and the second joint which are detachably connected enable a worker to respectively manufacture, transport and use the two joints according to specific requirements; when the instrument is required to be connected with the valve, the instrument is connected to the first connector firstly, so that the instrument is communicated with the first connector, and then the second connector is connected to the valve, so that the second connector is communicated with the valve; after the operation is finished, connecting the first joint with the second joint to enable the first joint to be communicated with the second joint, and communicating the instrument with the valve through the communicated joint assembly; at the moment, the first sealing ring is embedded into the first sealing groove and is abutted against the inner wall of the first sealing groove, so that the first sealing at the communication part of the first joint and the second joint is realized; when the first sealing ring is embedded into the first sealing groove, the second sealing ring in the first sealing groove is simultaneously embedded into the second sealing groove on the first sealing ring, so that secondary sealing is formed between the first joint and the second joint; the double-seal structure reduces the possibility of air leakage between the first joint and the second joint, so that the air tightness of the joint assembly is better, the possibility of influencing the measurement of the instrument due to poor air tightness is reduced, and the measurement data of the instrument is more accurate.

Optionally, the joint further comprises a fixing piece, the fixing piece is sleeved outside the first joint and the second joint, and the fixing piece is in threaded connection with the second joint; the first butt joint is provided with a first butt joint plate, the fixing piece is provided with a second butt joint plate, the fixing piece is sleeved outside the first joint and is in threaded connection with the second joint, the second butt joint plate is located on one side, away from the second joint, of the first butt joint plate, and the second butt joint plate is used for being in butt joint with the first butt joint plate.

By adopting the technical scheme, when the first joint and the second joint are required to be connected, the fixing piece is sleeved outside the first joint and the second joint, the fixing piece is rotated to enable the fixing piece to be screwed with the second joint, at the moment, the second butt joint plate on the fixing piece is abutted against the first butt joint plate on the first joint, the second butt joint plate presses the first joint on the second joint, and at the moment, the first joint is connected with the second joint; when the first joint and the second joint need to be separated, the fixing piece can be taken down by rotating the fixing piece reversely, and the first joint and the second joint can be separated at the moment; the mounting has realized that first joint and second connect the dismantlement between being connected, and the staff dismouting joint Assembly of being convenient for makes joint Assembly's use more convenient and easy to operate.

Optionally, a limiting member is disposed on the first joint, and the limiting member is used for limiting the fixing member sleeved outside the first joint and the second joint.

By adopting the technical scheme, when the fixing piece connects the first joint and the second joint together, the fixing piece has the possibility of generating looseness on the second joint due to the fact that the fixing piece is in threaded connection with the second joint, so that the connection between the first joint and the second joint is unstable, and even the integral air tightness is influenced; therefore, the limiting part is arranged on the first joint and used for limiting the fixing part, the possibility that the fixing part is loosened when the fixing part is sleeved outside the first joint and the second joint is reduced, and the connection between the first joint and the second joint is more stable.

In a second aspect, the application provides a sulfur hexafluoride gas valve with a sealing joint, which adopts the following technical scheme:

a sulfur hexafluoride gas valve with a sealing joint comprises the sealing joint.

Through adopting above-mentioned technical scheme, when being connected with the sealing joint of this application on the valve, the valve can carry out fine being connected with the instrument, makes the gas tightness between valve and instrument better, has reduced because the leakproofness is not good and makes the inaccurate possibility of instrument data.

Optionally, the valve further comprises a valve seat, wherein the valve seat is provided with a first blind hole, a second blind hole, a third blind hole and a fourth blind hole, the second blind hole is communicated with the third blind hole, the first blind hole is communicated with the second blind hole, and the fourth blind hole is communicated with the third blind hole; the second connect with the disk seat can be dismantled and be connected, the second connect with first blind hole intercommunication, it has the third seal groove to open on the disk seat, the third seal groove centers on the port setting of first blind hole, the third seal groove with be equipped with the third sealing ring between the second connects, the third sealing ring simultaneously with third seal groove inner wall with the second connects the butt.

By adopting the technical scheme, when the instrument is connected to the valve seat, the instrument is communicated with the joint assembly, and the joint assembly is communicated with the first blind hole of the valve seat through the second joint; when sulfur hexafluoride gas is required to be filled into external electrical equipment connected with the valve seat, the third blind hole is communicated with the external electrical equipment, the fourth blind hole is plugged, the valve seat is filled with gas through the second blind hole, and the sulfur hexafluoride gas enters the external equipment through the third blind hole after entering the valve seat; after the inflation is finished, the air source is cut off, the port of the second blind hole is plugged, and at the moment, the instrument communicated with the first blind hole can monitor the air pressure in the valve seat in real time; when the instrument needs to be calibrated, a communication port between the second blind hole and the third blind hole is plugged, at the moment, the valve seat is inflated through the second blind hole, gas only enters the first blind hole through the second blind hole, and at the moment, the inflation quantity at the gas source is adjusted to detect the numerical value of the instrument; in the scheme, the valve seat is provided with the fourth blind hole, so that the control member can be conveniently inserted into the valve seat to control the on-off of the third blind hole; when the joint assembly is connected to the valve seat, the third sealing ring is embedded into the third sealing groove, and the existence of the third sealing ring enables the air tightness of the joint between the second joint and the valve seat to be better; the third seal groove plays limiting displacement to the third sealing ring, has reduced the third sealing ring and has produced the slip or the possibility that drops in sealed department, and simultaneously, the third sealing ring has thickness, directly places the third sealing ring and can increase clearance between the two between second joint and the disk seat, makes the second connect unstable with being connected of disk seat, and the third seal groove makes the third sealing ring embedding one section including, changes in compressing tightly the laminating with the junction terminal surface of second joint and disk seat.

Optionally, a first ring groove is formed in the second joint, and the third sealing ring is fixedly connected in the first ring groove.

By adopting the technical scheme, when a worker installs the second joint on the valve seat, if the third sealing ring is firstly placed and then the second joint is placed, the connecting and installing steps between the second joint and the valve seat are complicated, and the assembling efficiency of the worker is reduced; therefore, the three sealing rings are fixedly connected with the second joint, and workers can realize sealing only by mounting the second joint on the valve seat, so that the operation steps are reduced, and the mounting efficiency is improved; in being fixed in first annular with the third sealing ring, the existence of first annular makes most outer walls of third sealing ring and the inner wall contact of first annular, has increased the area of contact between third sealing ring and second joint, is convenient for with third sealing ring fixed connection on the second joint.

Optionally, the inner diameter of the second blind hole is smaller than the inner diameter of the third blind hole, a valve ball with an air guide hole is arranged in the third blind hole, one end of the air guide hole is used for communicating with the second blind hole, and the other end of the air guide hole is used for communicating with the third blind hole; and a sealing washer is arranged between the communication position of the second blind hole and the third blind hole and the valve ball, the sealing washer is also arranged on one side of the valve ball, which is far away from the second blind hole, a locking ring is connected in the third blind hole in a threaded manner, and the locking ring is used for tightly pressing the sealing washer and the valve ball.

By adopting the technical scheme, when the on-off state between the third blind hole and the second blind hole needs to be adjusted, the on-off state can be realized by rotating the valve ball; when the third blind hole is required to be communicated with the second blind hole, the operating element extends into the fourth blind hole, the operating valve ball rotates in the third blind hole, and when one end of the air guide hole is communicated with the second blind hole and the other end of the air guide hole is communicated with the third blind hole, the third blind hole is communicated with the second blind hole through the valve ball; when the passage between the third blind hole and the second blind hole needs to be disconnected, the valve ball is controlled to rotate, at least one of the two ends of the air guide hole is not communicated with the second blind hole or the third blind hole, and the third blind hole and the second blind hole are blocked by the outer wall of the valve ball at the moment; the on-off control of the second blind hole and the third blind hole can be realized by a worker only by operating the valve ball; sealing gaskets are arranged on two sides of the valve ball, and the valve ball rotates on the sealing gaskets, so that the air tightness of the valve ball is better when the valve ball moves; the locking ring compresses tightly valve ball and seal ring, has reduced the possibility that the clearance appears in the butt department of valve ball and seal ring, makes the effect of break-make between valve ball control second blind hole and third blind hole better, and the locking ring adopts threaded connection's mode to connect on the disk seat, makes the installation of locking ring more convenient and stable with fixed.

Optionally, the third blind hole with it has the second annular to open on the inner wall of second blind hole intercommunication department, the second blind hole with the intercommunication mouth of third blind hole is enclosed in the second annular, be equipped with the compensation sealing washer in the second annular, the compensation sealing washer with be close to the second blind hole seal ring butt.

By adopting the technical scheme, in the actual production, the sealing washer is usually made of rubber, when the temperature rises, the rubber usually loses strength and tends to become softer and more compliant, and because the thermal expansion coefficient of the rubber is much higher than that of metal, when the working temperature of the sealing washer is greatly different from the normal room temperature, the degree of relative thermal expansion or contraction of the sealing washer is more obvious compared with the surrounding parts, so that the possibility of poor sealing effect is caused; therefore, the compensation sealing ring which is abutted with the sealing washer is arranged, so that both sides of the valve ball can ensure good air tightness no matter how the temperature changes; the compensation sealing ring is positioned in the second ring groove, and the peripheral wall of the second ring groove plays a role in limiting the compensation sealing ring, so that the expansion or contraction degree of the compensation sealing ring due to temperature change is reduced; meanwhile, the second ring groove limits the compensation sealing ring, and the possibility that the compensation sealing ring moves randomly in the valve seat is reduced.

Optionally, an independent sealing ring is arranged on one side, close to the valve ball, of the locking ring, and the independent sealing ring is abutted to the sealing washer far away from the second blind hole.

Through adopting above-mentioned technical scheme, when locking ring threaded connection was in the third blind hole, the locking ring compressed tightly seal ring and valve ball, independent sealing washer and seal ring butt this moment make the inside gas tightness of disk seat better, when having reduced the valve and ventilating, gaseous threaded connection from the retaining member revealed the possibility of revealing outward.

Optionally, a third annular groove is formed in one side, close to the sealing washer, of the locking ring, and the independent sealing washer is fixedly connected to the inside of the third annular groove.

By adopting the technical scheme, the independent sealing ring is arranged in the third ring groove, the contact area between the independent sealing ring and the locking ring is increased by the inner wall of the third ring groove, and the independent sealing ring is conveniently connected to the locking ring; when the staff installs the independent sealing washer, only need to screw up the locking ring in the third blind hole, can realize the sealed effect of independent sealing washer, the staff of being convenient for assembles the valve, makes the assembly efficiency of mill higher.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the first sealing ring, the first sealing groove, the second sealing ring and the second sealing groove are mutually matched, so that two layers of sealing structures are arranged between the first joint and the second joint, the sealing performance of the joint assembly is better, the sealing effect between the instrument and the valve is better, and the possibility of inaccurate measurement of the instrument is reduced;

2. the fixing piece is convenient for dismounting the joint component, and the limiting piece reduces the possibility that the fixing piece generates displacement after the connection is finished, so that the connection between the first joint and the second joint is more stable;

3. the third sealing ring is matched with the third sealing groove, so that the air tightness of the joint between the second joint and the valve seat is better;

4. the compensating washer plays a role in compensating and sealing the sealing washer;

5. the independent sealing ring reduces the possibility that gas leaks outwards from the threaded connection of the locking ring;

6. the third sealing ring is fixedly connected in the first ring groove, and the independent sealing ring is fixedly connected in the third ring groove, so that the part on the valve can be conveniently installed by a worker, and the working efficiency of a factory assembler is improved.

Drawings

FIG. 1 is a schematic diagram of a meter according to the related art of the present application;

FIG. 2 is a schematic view of the overall structure of embodiment 1 of the sealing joint of the present application;

FIG. 3 is an overall cross-sectional view of embodiment 1 of the sealing joint of the present application;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is an exploded view of embodiment 1 of the sealing joint of the present application;

fig. 6 is a schematic structural diagram of a limiting member according to embodiment 1 of the sealing joint of the present application;

FIG. 7 is a schematic view showing the overall structure of embodiment 2 of the sealing joint of the present application;

fig. 8 is a schematic structural diagram of a limiting member according to embodiment 2 of the sealing joint of the present application;

FIG. 9 is a schematic view of the assembled configuration of a sulfur hexafluoride gas valve, a sealing fitting, instrumentation and inflation fitting of the present application;

FIG. 10 is a schematic view of a sulfur hexafluoride gas valve according to the present application from a first perspective;

FIG. 11 is a schematic view of a sulfur hexafluoride gas valve of the present application at a second viewing angle;

FIG. 12 is a cross-sectional view of a sulfur hexafluoride gas valve, sealing fitting, and inflation fitting of the present application;

FIG. 13 is an enlarged view at B in FIG. 12;

FIG. 14 is an enlarged view at C of FIG. 12;

fig. 15 is an exploded view of a sulfur hexafluoride gas valve, sealing fitting and gas charging fitting of the present application.

Description of reference numerals: 1. a meter; 11. a gauge head; 12. a connecting rod; 2. a joint assembly; 21. a first joint; 211. a first butt joint plate; 212. a groove; 213. a baffle ring; 214. a first seal ring; 2141. a second seal groove; 215. an annular groove; 22. a second joint; 221. a columnar portion; 2212. a first seal groove; 2213. a second seal ring; 222. an extension pipe; 223. a ring platform; 224. a connecting disc; 2241. opening the gap; 2242. a first ring groove; 2243. a third seal ring; 3. a fixing member; 31. annular ring; 311. a second butt joint plate; 4. a limiting member; 5. a valve seat; 51. a joint connection face; 511. a first blind hole; 512. a threaded hole; 513. a third seal groove; 52. an inflatable surface; 521. a second blind hole; 522. a communicating hole; 523. a fourth seal groove; 53. an equipment connection face; 531. a third blind hole; 5311. a first counterbore; 532. connecting grooves; 533. a second ring groove; 5331. a compensating seal ring; 54. a control surface; 541. a fourth blind hole; 5411. connecting holes; 5412. a second counterbore; 55. an arc-shaped surface; 551. an arc-shaped slot; 552. a weight reduction space; 6. a valve ball; 61. an air vent; 62. a sealing gasket; 63. a keyway; 7. locking a ring; 71. a first boss; 72. a third ring groove; 721. an independent sealing ring; 8. a manipulation component; 81. a rod sleeve; 811. a second boss; 82. a valve stem; 820. a disc; 821. a raised key; 822. a movable sealing ring; 823. a fourth ring groove; 824. a hand wheel; 9. an inflation joint; 91. a protective cover.

Detailed Description

The present application is described in further detail below with reference to figures 1-15.

Referring to fig. 1, in the related art, a meter 1 needs to be connected to a valve, the meter 1 includes a meter head 11 and a connecting rod 12, the connecting rod 12 is welded and communicated with the meter head 11, and an external thread is formed at one end of the connecting rod 12, which is far away from the meter head 11.

The embodiment of the application discloses sealing joint.

Example 1

Referring to fig. 2 and 3, a sealed joint includes a joint assembly 2, a fixing member 3, and a retaining member 4.

Referring to fig. 2 and 3, the joint assembly 2 includes a first joint 21 and a second joint 22; the first joint 21 is cylindrical and is coaxially provided with a cylindrical through hole, in this embodiment, the first joint 21 is made of copper; an annular first abutting plate 211 is sleeved outside the first joint 21, the inner wall of the first abutting plate 211 is integrally connected with the peripheral wall of the first joint 21, and the first abutting plate 211 is positioned at any end in the axial direction of the first joint 21; the peripheral wall of the first joint 21 is provided with two grooves 212, the two grooves 212 are uniformly distributed along the circumferential direction of the first joint 21, the depth direction of the grooves 212 is perpendicular to the axis of the first joint 21, the groove bottoms of the two grooves 212 are both flat and parallel to each other, and the grooves 212 penetrate through the two sides of the first joint 21 in the axis direction; the recess 212 is used for placing a wrench, so that the first connector 21 cannot rotate freely when a worker installs the first connector 21.

Referring to fig. 3, the inner ring of the first joint 21 is coaxially and integrally connected with a circular blocking ring 213, the blocking ring 213 is made of the same material as that of the first joint 21, in the axial direction of the first joint 21, the blocking ring 213 is located at the middle position between the first abutting plate 211 and the groove 212, the inner ring of the first joint 21 located at the side of the blocking ring 213 away from the first abutting plate 211 is provided with an internal thread, the internal thread of the inner ring of the first joint 21 is matched with the external thread at one end of the connecting rod 12, and when the connecting rod 12 is screwed into the first joint 21, the blocking ring 213 is used for abutting against one end of the connecting rod 12 away from the gauge outfit 11.

Referring to fig. 3, in the present embodiment, the second joint 22 is made of aluminum, and the second joint 22 includes a column part 221, an extension pipe 222, a collar 223, and a connection disc 224; the columnar portion 221 and the extension pipe 222 are both cylindrical sleeves, the extension pipe 222 is coaxially and integrally connected to an end wall at one end of the columnar portion 221 in the axial direction, the inner diameter of the extension pipe 222 is the same as that of the columnar portion 221, the wall thickness and the outer diameter of the extension pipe 222 are smaller than those of the columnar portion 221, and the extension pipe 222 is used for inserting the first connector 21 into one side of the stop ring 213, which is close to the first abutting plate 211; the annular table 223 is annular and is sleeved outside one end of the columnar part 221 connected with the extension pipe 222, the annular table 223 and the columnar part 221 are coaxially and integrally connected, and the outer diameter of the annular table 223 is the same as that of the first abutting plate 211; connecting disc 224 is integrative to be connected on the end wall that column portion 221 is far away from loop bay 223, connecting disc 224 and column portion 221 intercommunication, the length direction of connecting disc 224 is perpendicular with the axis direction of column portion 221, column portion 221 is located the intermediate position on the length direction of connecting disc 224, the end wall at connecting disc 224 length direction both ends respectively opens and has a breach 2241, two breach 2241 all towards the direction concave yield that is close to column portion 221 axis, the diapire of breach 2241 is the arcwall face, so that with the follow-up bolt laminating that uses.

Referring to fig. 3, an end wall of the first abutting plate 211, which is far away from the groove 212, is located on the same plane as an end wall of the first joint 21, to which the first abutting plate 211 is connected, and an end wall of the column portion 221, which is far away from the connecting disc 224, is located on the same plane as an end wall of the ring platform 223, which is far away from the connecting disc 224; when the extension pipe 222 is inserted into the first joint 21, the first joint 21 communicates with the second joint 22, and the end wall of the first joint 21 at which the first abutting plate 211 is connected abuts against the end wall of the columnar portion 221 at the end remote from the connecting plate 224.

Referring to fig. 4, 5 and 6, in the present embodiment, a first sealing ring 214 is integrally connected to an end wall of the first joint 21 close to the column portion 221, the first sealing ring 214 is in a circular convex shape, and the first sealing ring 214 is coaxially arranged with the first joint 21; a first sealing groove 2212 is formed in the end wall of the columnar part 221 close to the first joint 21, the first sealing groove 2212 is an annular groove, and the first sealing groove 2212 is coaxial with the columnar part 221 and surrounds the outer side of the extension pipe 222; in other embodiments, the end wall of the pillar portion 221 near the first joint 21 is integrally connected with the first sealing ring 214, and the end wall of the first joint 21 near the pillar portion 221 is provided with a first sealing groove 2212.

Referring to fig. 4, 5 and 6, in the present embodiment, an annular convex second sealing ring 2213 is integrally connected in the first sealing groove 2212, the second sealing ring 2213 is coaxially disposed with the first sealing groove 2212, and an annular second sealing groove 2141 is coaxially formed on one side of the first sealing ring 214 close to the cylindrical portion 221; when the extension pipe 222 is inserted into the first connector 21, the end wall of the first connector 21 close to the second connector 22 is attached to the end wall of the column portion 221 close to the first connector 21, the first sealing ring 214 is pressed into the first sealing groove 2212, the second sealing ring 2213 is pressed into the second sealing groove 2141, and a double sealing structure is formed between the first connector 21 and the second connector 22.

Referring to fig. 3 and 5, in other embodiments, the first joint 21 is directly screwed to the second joint 22, the inner ring of the first joint 21 on the side of the retaining ring 213 close to the first abutting plate 211 is provided with internal threads, the outer wall of the extension pipe 222 is sleeved with an external thread sleeve, and the inner wall of the first joint 21 is screwed to the outer wall of the extension pipe 222, so that the connection between the first joint 21 and the second joint 22 is more convenient and faster; in this embodiment, the first joint 21 and the second joint 22 are connected by a fixing member 3, the fixing member 3 is in the shape of a regular hexagonal prism disk, and the fixing member 3 is coaxially provided with an annular hole 31; the fixing piece 3 is sleeved outside the first abutting plate 211 and the annular table 223, the inner wall of the annular hole 31 is coaxially and integrally connected with a circular second abutting plate 311, and the second abutting plate 311 is positioned at one end of the annular hole 31 in the axial direction; the inner diameter of the second abutting plate 311 is larger than the outer diameter of the first joint 21 and smaller than the outer diameter of the first abutting plate 211, and when the fixing element 3 is sleeved outside the first abutting plate 211 and the annular table 223, the second abutting plate 311 is located on one side of the first abutting plate 211 away from the column portion 221; the inner wall of the annular hole 31 of the fixing piece 3 is in threaded connection with the peripheral wall of the annular table 223, when the fixing piece 3 is screwed on the annular table 223, the second abutting plate 311 abuts against the first abutting plate 211, and the fixing piece 3 in the shape of a hexagonal prism disc is selected in the embodiment, so that the possibility of slipping of the hand of a worker is reduced when the worker screws the fixing piece 3; in other embodiments, the fixing element 3 may be a plurality of studs, the second abutting plate 311 is disc-shaped and coaxially welded to one end of the fixing element 3, the fixing element 3 passes through the first abutting plate 211 to be screwed with the annular platform 223, and when the fixing element 3 is screwed with the annular platform 223, the second abutting plate 311 abuts against the first abutting plate 211.

Referring to fig. 6, in the present embodiment, the limiting member 4 is an annular rubber ring; an annular groove 215 is coaxially formed in the outer wall of the first joint 21, in the axial direction of the first joint 21, the annular groove 215 is located between the groove 212 and the first abutting plate 211, the limiting member 4 is sleeved outside the inner wall of the annular groove, the limiting member 4 is clamped in the annular groove 215 and abuts against the inner wall of the annular groove 215, and the limiting member 4 is detachably connected with the inner wall of the annular groove 215; when the fixing element 3 is screwed outside the annular table 223, the limiting element 4 is installed at the annular groove 215, at this time, the limiting element 4 is located on one side of the second abutting plate 311 away from the first abutting plate 211, and at this time, the limiting element 4 abuts against the second abutting plate 311.

The implementation principle of the embodiment 1 is as follows: when the instrument 1 needs to be connected to the valve, the instrument 1 is firstly connected to the first connector 21 through threads, and then the extension pipe 222 is inserted into the first connector 21, so that the first connector 21 is communicated with the second connector 22; after the first joint 21 and the second joint 22 are primarily butted, the fixing member 3 is sleeved outside the first butting plate 211 and the ring platform 223, the fixing member 3 is screwed outside the ring platform 223 and then screwed, at this time, the second butting plate 311 is butted with the first butting plate 211, the second butting plate 311 presses the first butting plate 211 tightly against the ring platform 223, the first sealing ring 214 on the first joint 21 is pressed into the first sealing groove 2212 on the second joint 22, and meanwhile, the second sealing ring 2213 in the first sealing groove 2212 is pressed into the second sealing groove 2141 on the first sealing ring 214 to form a double-sealing structure, so that the possibility that gas leaks from the joint of the first joint 21 and the second joint 22 is reduced, the sealing performance of the joint assembly 2 is better, and the measured value of the meter 1 is more accurate.

Example 2

Referring to fig. 7 and 8, the present embodiment is different from embodiment 1 in that the second sealing ring 2213 is connected to the inner wall of the first sealing groove 2212 in a different manner, and the stopper 4 has a different structure.

Referring to fig. 8, in this embodiment, the second sealing ring 2213 is an annular rubber ring, the second sealing ring 2213 is located in the first sealing groove 2212 and is coaxially disposed with the inner wall of the first sealing groove 2212, the second sealing ring 2213 is bonded to the inner wall of the first sealing groove 2212 by glue, and when the first connector 21 is connected to the second connector 22, the second sealing ring 2213 is press-fitted into the second sealing groove 2141 and abuts against the inner wall of the second sealing groove 2141.

Referring to fig. 8, in the present embodiment, the limiting member 4 is a large nut, the peripheral wall of the first joint 21 is provided with an external thread that is in threaded fit with the limiting member 4, the limiting member 4 is in threaded connection with the first joint 21, and after the fixing member 3 is screwed on the ring platform 223, the limiting member 4 is screwed, and at this time, the limiting member 4 abuts against the second abutting plate 311.

The implementation principle of the embodiment 2 is as follows: when the first joint 21 is connected with the second joint 22, the fixing element 3 is screwed, and at the same time, the first sealing ring 214 on the first joint 21 is pressed into the first sealing groove 2212 on the second joint 22, and at the same time, the second sealing ring 2213 in the first sealing groove 2212 is pressed into the second sealing groove 2141 on the first sealing ring 214, so that double sealing between the first joint 21 and the second joint 22 is realized; when the fixing member 3 is screwed on the annular table 223, the limiting member 4 is installed, and the limiting member 4 is screwed until abutting against the second abutting plate 311, so that the possibility that the fixing member 3 is loosened is reduced.

The embodiment of the application also discloses a sulfur hexafluoride gas valve with a sealing joint.

Referring to fig. 9, the sulfur hexafluoride gas valve includes a sealing joint and a valve seat 5, and the sealing joint may be the sealing joint in embodiment 1 or the sealing joint in embodiment 2.

Referring to fig. 10 and 11, the valve seat 5 is made of aluminum, and the valve seat 5 includes a joint connection surface 51, a gas filling surface 52, a device connection surface 53, and a manipulation surface 54, the joint connection surface 51 being located opposite and parallel to the manipulation surface 54, and the gas filling surface 52 being located opposite and parallel to the device connection surface 53.

Referring to fig. 12 and 13, the connector connection surface 51 is provided with a first blind hole 511, and the depth direction of the first blind hole 511 is perpendicular to the plane of the connector connection surface 51; the inflation surface 52 is provided with a second blind hole 521, the depth direction of the second blind hole 521 is vertical to the plane of the inflation surface 52, and the first blind hole 511 is communicated with the second blind hole 521; a third blind hole 531 is formed in the equipment connecting surface 53, the axis of the third blind hole 531 is overlapped with the axis of the second blind hole 521, the second blind hole 521 is communicated with the third blind hole 531, and the aperture of the third blind hole 531 is larger than that of the second blind hole 521; a first counter bore 5311 is expanded at one end of the third blind hole 531 close to the equipment connection surface 53, an annular connection groove 532 is formed in the equipment connection surface 53, the connection groove 532 surrounds the port of the first counter bore 5311, and the connection groove 532 is arranged to facilitate connection between the valve seat 5 and external equipment; the control surface 54 is provided with a fourth blind hole 541, the depth direction of the fourth blind hole 541 is perpendicular to the plane of the control surface 54, one end of the fourth blind hole 541 close to the control surface 54 is provided with a connecting hole 5411, a port of the connecting hole 5411 is provided with a second counter bore 5412, and the fourth blind hole 541 is communicated with the third blind hole 531.

Referring to fig. 13, a valve ball 6 with an air vent 61 is arranged in the third blind hole 531, an axis of the air vent 61 passes through a spherical center of the valve ball 6, and an inner diameter of the air vent 61 is smaller than an inner diameter of the second blind hole 521; the diameter of the valve ball 6 is the same as the inner diameter of the third blind hole 531, and the ball wall of the valve ball 6 without the air guide hole 61 is used for being attached to the inner wall of the third blind hole 531; when the axis of the air guide hole 61 rotates to a state of being overlapped with the axis of the third blind hole 531, the air guide hole 61 connects the second blind hole 521 with the third blind hole 531; two annular sealing gaskets 62 are arranged in the third blind hole 531, the two sealing gaskets 62 are made of rubber and distributed along the axis of the third blind hole 531, the two sealing gaskets 62 are coaxially arranged with the third blind hole 531, and the valve ball 6 is clamped between the two sealing gaskets 62; a second annular groove 533 is formed in the inner wall of the communication part between the second blind hole 521 and the third blind hole 531, the second annular groove 533 is disposed around the communication opening between the second blind hole 521 and the third blind hole 531, an annular compensation sealing ring 5331 made of rubber is disposed in the second annular groove 533, and in this embodiment, the compensation sealing ring 5331 is a rubber ring.

Referring to fig. 13, a locking ring 7 is connected to the third blind hole 531 in an internal thread manner, in this embodiment, the locking ring 7 is made of aluminum material, the locking ring 7 is a cylinder coaxially opened with a hexagonal prism-shaped hole, and the port of the internal ring hole of the locking ring 7 is hexagonal, so that a worker can conveniently tighten the locking ring by using a hexagonal wrench; an annular first boss 71 is coaxially sleeved outside one end of the locking ring 7, the inner wall of the first boss 71 is integrally connected with the outer wall of the locking ring 7, the first boss 71 is used for being embedded into the first counter bore 5311, and a small gasket is arranged between the first boss 71 and the inner wall, close to the valve ball 6, of the first counter bore 5311; the end wall of the locking ring 7 extending into the third blind hole 531 is provided with a third ring groove 72, the third ring groove 72 is internally bonded with an annular independent sealing ring 721 through glue, the independent sealing ring 721 and the third ring groove 72 are coaxially arranged, in the embodiment, the independent sealing ring 721 is a rubber ring; when the locking ring 7 is screwed into the third blind hole 531, the independent sealing ring 721 abuts against the sealing washers 62 far from the second blind hole 521, both the sealing washers 62 abut against the valve ball 6, and the sealing washer 62 near the second blind hole 521 abuts against the compensation sealing ring 5331, so that the valve ball 6 is clamped between the two sealing washers 62 and can only rotate by external force.

Referring to fig. 13, the sulfur hexafluoride gas valve with sealed joint further includes an operating assembly 8, the operating assembly 8 including a stem sleeve 81 and a valve stem 82; in this embodiment, the stem sleeve 81 and the valve stem 82 are both made of a copper material, and in other embodiments, the stem sleeve 81 and the valve stem 82 may be made of an aluminum material; in this embodiment, the valve rod 82 is cylindrical, the rod sleeve 81 is a cylindrical shaft sleeve, the valve rod 82 is inserted into the rod sleeve 81, and the rod sleeve 81 is screwed into the connecting hole 5411; one end of the rod sleeve 81 is sleeved with an annular second boss 811, the inner wall of the second boss 811 is integrally connected with the outer wall of the rod sleeve 81, the second boss 811 extends into the second counter bore 5412, and a small gasket is arranged between the second boss 811 and the inner wall, close to the valve ball 6, of the second counter bore 5412; one end of the valve rod 82, which is far away from the second boss 811, is integrally connected with a disc 820, the disc 820 and the valve rod 82 are coaxially arranged, the disc 820 is positioned in the connecting hole 5411, the diameter of the disc 820 is larger than the inner diameter of the rod sleeve 81, the diameter of the disc 820 is also larger than the inner diameter of the fourth blind hole 541, the disc 820 is clamped between the rod sleeve 81 and the connecting hole 5411, which is close to the inner wall of the valve ball 6, and the disc 820 is used for preventing the valve rod 82 from being separated from the rod sleeve 81; the end wall of the disc 820 far away from the valve rod 82 is integrally connected with a protruding key 821, the valve ball 6 is provided with a key groove 63, the key groove 63 is located on one side of the axis direction of the air guide hole 61, the protruding key 821 penetrates through the fourth blind hole 541 and extends into the third blind hole 531, and one end, extending into the third blind hole 531, of the protruding key 821 is inserted into the key groove 63.

Referring to fig. 13, in this embodiment, a plurality of fourth grooves 823 are formed in the peripheral wall of the valve rod 82, the fourth grooves 823 are distributed at intervals in the axial direction of the valve rod 82, each fourth groove 823 is embedded with one movable sealing ring 822, in this embodiment, the movable sealing ring 822 is a rubber ring, and the movable sealing ring 822 is detachably sleeved outside the inner wall of the fourth groove 823; in other embodiments, the movable sealing ring 822 is a plastic ring, and the movable sealing ring 822 is adhered to the inner wall of the fourth groove 823 by glue; when the valve rod 82 is inserted into the rod sleeve 81, the movable sealing ring 822 is abutted against the inner wall of the rod sleeve 81 to seal the rod sleeve 81, so that the possibility of leakage of gas from the rod sleeve 81 when the valve rod 82 moves is reduced; in other embodiments, the movable sealing ring 822 is an annular protrusion made of a copper material, a plurality of movable sealing rings 822 are uniformly distributed along the axial direction of the valve rod 82, and the movable sealing rings 822 are integrally connected with the valve rod 82; in this embodiment, a hand wheel 824 is fixedly connected to one end of the valve rod 82 far away from the valve ball 6 through a screw, and the hand wheel 824 facilitates a worker to rotate the valve rod 82.

Referring to fig. 14 and 15, the second joint 22 is detachably connected to the valve seat 5 by bolts, and when the second joint 22 is required to be connected to the valve seat 5, the end wall of the connecting plate 224 away from the columnar portion 221 is attached to the joint connecting surface 51; the joint connecting surface 51 is provided with two threaded holes 512, the two threaded holes 512 are distributed on different sides of the port of the first blind hole 511, and the two threaded holes 512 are distributed along the length direction of the connecting disc 224; a bolt for connecting the second joint 22 with the valve seat 5 passes through the notch 2241 to be in threaded connection with the inner wall of the threaded hole 512, and a gasket is arranged between the nut of the bolt and the end wall of the connecting disc 224 close to the columnar part 221.

Referring to fig. 14, a circular first ring groove 2242 is formed in the connecting disc 224, the first ring groove 2242 is coaxial with the columnar portion 221, a circular third sealing ring 2243 is bonded in the first ring groove 2242 through glue, in this embodiment, the third sealing ring 2243 is a rubber ring, and the third sealing ring 2243 is coaxial with the first ring groove 2242; an annular third sealing groove 513 is formed in the joint connection surface 51, the third sealing groove 513 is arranged around the port of the first blind hole 511, and when the connecting disc 224 is attached to the joint connection surface 51, the third sealing ring 2243 is pressed in the third sealing groove 513.

Referring to fig. 15, the connector connection surface 51, the inflation surface 52, the device connection surface 53 and the operation surface 54 are distributed along the circumferential direction of a straight line, the valve seat 5 is distributed with two arc surfaces 55 in the straight line direction, the two arc surfaces 55 and the four surfaces form six surfaces of the valve seat 5 in the present embodiment, the two arc surfaces 55 are both protruded towards the outer side of the valve seat 5, the two arc surfaces 55 are both provided with an arc groove 551, the two arc grooves 551 are recessed towards the direction close to each other, and due to the arc grooves 551, two weight reduction spaces 552 are formed on two sides of the valve seat 5; the gas-filled surface 52 is provided with two communication holes 522, and each communication hole 522 is communicated with a weight-reduction space 552.

Referring to fig. 15, a fourth sealing groove 523 is formed in the inflation surface 52, the fourth sealing groove 523 is arranged around a port of the second blind hole 521, the size and shape of the fourth sealing groove 523 are the same as those of the third sealing groove 513, and the inflation surface 52 is detachably connected with an inflation connector 9 through a bolt and a nut, in this embodiment, the inflation connector 9 and the second connector 22 have the same size, shape and structure, and a bolt sequentially penetrates through a gap of the inflation connector 9 and the communication hole 522 and then is in threaded connection with the nut; when the air charging connector 9 is connected with the valve seat 5, the air charging connector 9 is communicated with the second blind hole 521; aerify and connect 9 dustcoats and be equipped with protective cover 91, protective cover 91 with aerify and connect 9 threaded connection, when aerifing that to connect 9 not use, protective cover 91 is used for protecting aerifing the kneck that connects 9.

The implementation principle of the sulfur hexafluoride gas valve in the embodiment of the application is as follows: when the sulfur hexafluoride valve is used, the connector assembly 2 of the instrument 1 is mounted on the connector connection surface 51, and the inflation connector 9 is connected to the inflation surface 52.

When needing the check-up instrument 1, open protective cover 91, rotate valve rod 82 through hand wheel 824, control valve ball 6 through valve rod 82 and rotate, rotate air guide hole 61 to the state that does not communicate with second blind hole 521 and third blind hole 531, aerify towards the inflation joint 9 this moment in, gas directly gets into in the joint subassembly 2, and the staff is through adjusting the process of aerifing to the realization is to the check-up of instrument 1.

When inflation is needed, the valve ball 6 is rotated to the state of communicating the second blind hole 521 with the third blind hole 531 through the hand wheel 824, at the moment, inflation can be performed on the valve seat 5 through the inflation connector 9, sulfur hexafluoride gas enters the valve seat 5 and then enters the high-voltage electrical equipment through the third blind hole 531, after inflation is completed, the gas source is taken down, and the protective cover 91 is in threaded connection with the inflation connector 9.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A sealing joint, characterized by: the connector assembly (2) comprises a first connector (21) and a second connector (22), wherein the first connector (21) and the second connector (22) are detachably connected and are communicated with each other;

one of two side walls of the communication part of the first joint (21) and the second joint (22) is provided with a first sealing groove (2212), the other side wall is provided with a first sealing ring (214), and the first sealing ring (214) is used for being abutted against the inner wall of the first sealing groove (2212); be equipped with second sealing ring (2213) in first seal groove (2212), it has second seal groove (2141) to open on first sealing ring (214), second sealing ring (2213) be used for with the inner wall butt of second seal groove (2141).

2. A sealing joint as defined in claim 1, wherein: the connecting device further comprises a fixing piece (3), the fixing piece (3) is sleeved outside the first joint (21) and the second joint (22), and the fixing piece (3) is in threaded connection with the second joint (22);

be equipped with first butt joint board (211) on first joint (21), be equipped with second butt joint board (311) on mounting (3), mounting (3) cover is located first joint (21) outer and screw thread connection in when on second joint (22), second butt joint board (311) are located first butt joint board (211) is kept away from one side that second joint (22), second butt joint board (311) be used for with first butt joint board (211) butt.

3. A sealing joint as defined in claim 2, wherein: be equipped with locating part (4) on first joint (21), locating part (4) are used for carrying on spacingly to the cover locate first joint (21) with outside second joint (22) mounting (3).

4. The utility model provides a sulfur hexafluoride gas valve with sealing joint which characterized in that: comprising a sealing joint as claimed in any one of claims 1 to 3.

5. The sulfur hexafluoride gas valve as claimed in claim 4, wherein said sealing fitting comprises: the valve seat (5) is provided with a first blind hole (511), a second blind hole (521), a third blind hole (531) and a fourth blind hole (541), the second blind hole (521) is communicated with the third blind hole (531), the first blind hole (511) is communicated with the second blind hole (521), and the fourth blind hole (541) is communicated with the third blind hole (531);

the second connect (22) with valve seat (5) can dismantle the connection, the second connect (22) with first blind hole (511) intercommunication, it has third seal groove (513) to open on valve seat (5), third seal groove (513) centers on the port setting of first blind hole (511), third seal groove (513) with be equipped with third sealing ring (2243) between second joint (22), third sealing ring (2243) simultaneously with third seal groove (513) inner wall with second joint (22) butt.

6. The sulfur hexafluoride gas valve as claimed in claim 5, wherein said sealing fitting comprises: the second connector (22) is provided with a first ring groove (2242), and the third sealing ring (2243) is fixedly connected in the first ring groove (2242).

7. A sulphur hexafluoride gas valve as claimed in claim 5 or claim 6, wherein: the inner diameter of the second blind hole (521) is smaller than that of the third blind hole (531), a valve ball (6) provided with an air guide hole (61) is arranged in the third blind hole (531), one end of the air guide hole (61) is used for being communicated with the second blind hole (521), and the other end of the air guide hole (61) is used for being communicated with the third blind hole (531);

a sealing washer (62) is arranged between the communication position of the second blind hole (521) and the third blind hole (531) and the valve ball (6), the sealing washer (62) is also arranged on one side, far away from the second blind hole (521), of the valve ball (6), a locking ring (7) is connected to the third blind hole (531) in an internal thread mode, and the locking ring (7) is used for pressing the sealing washer (62) and the valve ball (6).

8. The sulfur hexafluoride gas valve as claimed in claim 7, wherein said sealing fitting comprises: third blind hole (531) with it has second annular (533) to open on the inner wall of second blind hole (521) intercommunication department, second blind hole (521) with the intercommunication mouth of third blind hole (531) is surrounded in second annular (533), be equipped with compensation sealing washer (5331) in second annular (533), compensation sealing washer (5331) with be close to second blind hole (521) seal ring (62) butt.

9. The sulfur hexafluoride gas valve as claimed in claim 7, wherein said sealing fitting comprises: an independent sealing ring (721) is arranged on one side, close to the valve ball (6), of the locking ring (7), and the independent sealing ring (721) is abutted to the sealing washer (62) far away from the second blind hole (521).

10. The sulfur hexafluoride gas valve as claimed in claim 9, wherein said sealing fitting comprises: one side of the locking ring (7) close to the sealing washer (62) is provided with a third annular groove (72), and the independent sealing ring (721) is fixedly connected in the third annular groove (72).

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