CN115824530A

CN115824530A - Valve gas tightness detection device

Info

Publication number: CN115824530A
Application number: CN202211725794.9A
Authority: CN
Inventors: 王炳玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-03-21

Abstract

The invention relates to the technical field of valve detection, in particular to a valve air tightness detection device which comprises a workbench, wherein a support plate is symmetrically arranged in the middle of the upper surface of the workbench and used for supporting and placing a valve; through the rotation of two rotations to the lead screw, can drive in the screw thread sealing head screw thread sealing connection who is rotatory to the screw valve mouth at valve body both ends, and then realize carrying out screw thread sealing connection to the valve port at internal thread valve both ends, can fix to the backup pad to internal thread valve again simultaneously, and then not only can prevent internal thread valve because sealed relatively poor phenomenon that leaks gas when the gas tightness detects, can prevent again simultaneously that the valve is inside to fill the promotion that leads to the valve to produce the phenomenon of removing of high-pressure gas.

Description

Valve gas tightness detection device

Technical Field

The invention relates to the technical field of valve detection, in particular to a valve air tightness detection device.

Background

At present, the valve is widely applied to various fields, and the requirement on the air tightness of the valve is extremely high, so that the air tightness item needs to be detected before the valve leaves a factory so as to ensure that the air tightness of the product is qualified. The air tightness detection of the large valves at present mostly adopts a water immersion method, and the method has low precision.

Application number is CN202110756316.3, and the patent name is valve gas tightness check out test set, includes the fuselage and forms in the cistern of fuselage, the cistern top is equipped with lift platform, the last symmetry of lift platform is provided with the driving piece, every all be connected with the sealing member on the driving piece, one of them be connected with the intake pipe on the sealing member, the last position that lies in between two sealing members of lift platform is rotated through the pivot and is provided with testing platform, testing platform is last to be formed with and to supply the valve to place and with the corresponding detection station of sealing member, the axis of pivot parallels with the line of symmetry of two sealing members.

When the valve with the internal thread needs to be subjected to air tightness detection, because two ports of the valve body of the valve are mostly in a structure similar to a nut and are not provided with flanges at two ends of the valve body, when the valve with the internal thread is subjected to air tightness detection, if the existing sealing plug type sealing element is inserted into threaded holes at two ends of the valve body, a gap is generated between the sealing plug and the threaded hole, and then the phenomenon of air leakage of the valve during air tightness detection is caused; if adopt the hook sealing mechanism to press from both sides tight sealed, then because the both ends of valve body are not the ring flange structure, consequently, hook sealing mechanism can not press from both sides the both ends of pressing from both sides the valve body of laminating to the internal screw thread, and then just can not realize carrying out safe short-term test to the internal screw thread valve.

Disclosure of Invention

The invention aims to provide a valve airtightness detection device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a valve gas tightness detection device, includes the workstation, workstation upper surface middle part position symmetry is provided with the backup pad, the backup pad is used for supporting the valve and places, the upper surface of workstation is provided with the thread sealing detection mechanism, the thread sealing detection mechanism is used for sealing up the detection to having the internal screw thread valve, workstation one side top is provided with valve torsion mechanism, valve torsion mechanism is used for driving the hand wheel of valve body top and twists reverse.

Further, the thread sealing detection mechanism comprises a double-rotation-direction lead screw, a moving block, an L-shaped support plate, a connecting shaft tube, an air guide tube, a driving gear, a driven gear and a thread sealing head, wherein a guide groove is formed in the left horizontal direction and the right horizontal direction of the upper surface of the workbench, the double-rotation-direction lead screw is rotationally arranged in the guide groove, the moving block is symmetrically sleeved on the double-rotation-direction lead screw through lead screw nuts, the symmetrical moving block is located on the outer side of the support plate, the L-shaped support plate is connected to the upper surface of the moving block, the connecting shaft tube is arranged on a vertical plate of the L-shaped support plate in a rotating mode through a bearing, the air guide tube is connected to the connecting shaft tube in a rotating mode in an inserting mode, the driving gear is fixedly sleeved on the outer wall of the connecting shaft tube, the driven gear is meshed below the driving gear, the left side face of the driven gear is connected to an output shaft of the motor, the motor is fixed to the side face of the vertical plate of the L-shaped support plate, the outer ring face of the end portion of the connecting shaft tube is provided with the thread sealing head through a dismounting connection mechanism, and the thread sealing head is connected to two ends of the valve with the internal thread.

Further, dismantle coupling mechanism and include first calorie of strip, second calorie of strip, locking screw and locking dish, a plurality of first draw-in grooves have been seted up to the tip outer lane array of connecting the central siphon, the inner circle wall circumference array of thread sealing head has a plurality of first calorie of strips, and first calorie of strip sliding insertion is in first draw-in groove, the outer lane wall array that connecting the central siphon is close to L type extension board has a plurality of second calorie of strips of setting, thread sealing head is close to one side inner circle face of L type extension board and has seted up a plurality of second draw-in grooves, and a plurality of second draw-in grooves slide and cup joint outside the second calorie of strip, and is a plurality of first calorie of strip and a plurality of second calorie of strips all slide and align, and horizontal direction about first calorie of strip and the second calorie of strip seted up threaded hole, and a plurality of equal threaded connection has locking screw in the threaded hole, the terminal surface of contact between connecting central siphon and the locking dish is provided with the locking dish, and the locking dish is locked fixedly through locking screw.

Furthermore, a spiral sealing strip is arranged in a spiral groove of the outer ring of the thread sealing head, the spiral sealing strip is in the shape of an elastic rubber tube, and one end, far away from the end face of the connecting shaft tube, of the spiral sealing strip is communicated to the connecting shaft tube through an air guide groove.

Further, the valve torsion mechanism includes carriage, axis of rotation, twists reverse the dish and twists reverse the screw rod, the fixed trailing flank that sets up at the workstation of carriage, and the vertical rotation of the top face of carriage is provided with the axis of rotation, the upper end of axis of rotation and the fixed motor output shaft who sets up of carriage top face, and the lower terminal surface of axis of rotation passes the carriage and is connected with the dish of twisting through electric putter, it twists reverse the dish and is provided with a plurality of screws of twisting.

Furthermore, a plurality of threaded holes are formed in the torsion disc, and torsion screws are connected in the threaded holes correspondingly in a threaded manner.

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

1. the end part of the connecting shaft tube is provided with the thread sealing head, the thread sealing heads at the end part of the connecting shaft tube can be driven to move close to the inner thread valve hole of the valve through the movement of the symmetrical L-shaped support plate, the connecting shaft tube is driven to rotate through the meshing of the driven gear and the driving gear, the connecting shaft tube can drive the thread sealing heads to rotate to the valve ports at the two ends of the inner thread valve, meanwhile, the rotating thread sealing heads can be driven to be in thread sealing connection with the thread valve ports at the two ends of the valve body through the rotation of the double-rotation-direction screw rod, further, the thread sealing connection of the valve ports at the two ends of the inner thread valve is realized, meanwhile, the inner thread valve can be fixed on the support plate, further, the phenomenon of air leakage of the inner thread valve due to poor sealing during air tightness detection can be prevented, and the phenomenon of valve movement caused by the pushing of high-pressure gas filled in the valve can be prevented.

2. According to the invention, through the sliding splicing fit of the plurality of first clamping strips on the inner ring of the thread sealing head and the plurality of first clamping grooves formed in the outer ring of the connecting shaft tube and the fit of the second clamping strips on the outer ring of the connecting shaft tube and the second clamping grooves on the inner ring of the thread sealing head, the thread sealing head can be slidably sleeved on the connecting shaft tube, meanwhile, the thread sealing head can be driven to rotate by the rotation of the connecting shaft tube, and the sliding limiting effect on the thread sealing head can be realized by the fit of the first clamping strips and the second clamping strips, so that the thread sealing head is prevented from impacting the side surface of the L-shaped support plate when sliding on the connecting shaft tube, and further the safe use of the thread sealing head is influenced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a thread seal detection mechanism according to the present invention;

FIG. 3 is a schematic structural view of a valve twisting mechanism according to the present invention;

fig. 4 is a cross-sectional view of the thread seal detection mechanism of the present invention.

In the figure: 1. a work table; 2. a support plate; 3. a thread seal detection mechanism; 31. a double-rotation-direction screw rod; 32. a moving block; 33. an L-shaped support plate; 34. connecting the shaft tube; 341. a first card slot; 35. an air duct; 36. a driving gear; 37. a driven gear; 38. a thread seal head; 381. a second card slot; 4. disassembling the connecting mechanism; 41. a first clip strip; 42. a second clamping strip; 43. locking the screw rod; 44. a locking disc; 45. a spiral seal strip; 5. a valve twisting mechanism; 51. a support frame; 52. a rotating shaft; 53. a torsion disc; 531. a threaded hole; 54. the screw is twisted.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 1 to 4, the present invention provides a technical solution of a valve airtightness detection apparatus: the valve sealing device comprises a workbench 1, wherein supporting plates 2 are symmetrically arranged in the middle of the upper surface of the workbench 1, the supporting plates 2 are used for supporting and placing a valve, a thread sealing detection mechanism 3 is arranged on the upper surface of the workbench 1, the thread sealing detection mechanism 3 is used for carrying out sealing detection on the valve with an internal thread, a valve torsion mechanism 5 is arranged above one side of the workbench 1, and the valve torsion mechanism 5 is used for driving and torsion of a hand wheel above a valve body; when the valve with the internal thread is in work, when the valve with the internal thread needs to be subjected to air tightness detection, because two ports of the valve body of the valve are mostly in a structure similar to a nut and are not provided with flange plates at two ends of the valve body, when the valve with the internal thread is subjected to air tightness detection, if the existing sealing plug type sealing element is adopted to be inserted into the threaded holes 531 at two ends of the valve body, a gap is generated between the sealing plug and the threaded holes 531, and then the phenomenon of air leakage of the valve during air tightness detection is caused; if the hook claw sealing mechanism is adopted for clamping and sealing, the two ends of the valve body are not of flange plate structures, so that the hook claw sealing mechanism cannot clamp and attach to the two ends of the valve body of the valve with the internal thread, and further the safe and rapid detection on the valve with the internal thread cannot be realized; therefore, the symmetrical support plates 2 are arranged on the upper surface of the workbench 1, the support plates 2 can support the internal thread valve placed above the workbench 1, then a worker controls the thread sealing detection mechanism 3 to move through the PLC control system on the workbench 1, so that the thread sealing detection mechanism 3 can be connected into the thread holes 531 at two ends of the valve body of the internal thread valve in a thread sealing mode, the two ports of the internal thread valve can be sealed in a thread mode, meanwhile, the internal thread valve can be fixed on the support plates 2, the phenomenon that the internal thread valve leaks air due to poor sealing during air tightness detection can be prevented, and the phenomenon that the valve moves due to the pushing of high-pressure air filled in the valve can be prevented.

As an embodiment of the present invention, the thread sealing detection mechanism 3 includes a double-rotation direction lead screw 31, a moving block 32, an L-shaped support plate 33, a connecting shaft tube 34, an air duct 35, a driving gear 36, a driven gear 37 and a thread sealing head 38, a guide groove is formed in the left and right horizontal directions on the upper surface of the workbench 1, the double-rotation direction lead screw 31 is rotatably disposed in the guide groove, the moving block 32 is symmetrically sleeved on the double-rotation direction lead screw 31 through a lead screw nut, the symmetrical moving block 32 is located on the outer side of the support plate 2, the upper surface of the moving block 32 is connected with the L-shaped support plate 33, a connecting shaft tube 34 is rotatably disposed on a riser of the L-shaped support plate 33 through a bearing, the air duct 35 is rotatably inserted into the connecting shaft tube 34, the driving gear 36 is fixedly sleeved on the outer wall of the connecting shaft tube 34, the driven gear 37 is engaged below the driving gear 36, the left side surface of the driven gear 37 is connected to an output shaft of the motor, the motor is fixed to the side surface of the riser of the L-shaped support plate 33, the outer ring surface of the end of the connecting shaft tube 34 is provided with the thread sealing head 38 through the detachable connection mechanism 4, and the thread sealing head 38 is connected to two internal threads of the valve; when the valve is in work, when the air tightness of the valve placed above the supporting plate 2 needs to be detected, at the moment, a worker controls the motor on the left side of the workbench 1 to work through the PLC control system, the output shaft of the motor drives the double-rotation-direction lead screw 31 to rotate, the double-rotation-direction lead screw 31 drives the symmetrical moving block 32 to move towards the direction of the supporting plate 2 through the lead screw nut, further the moving block 32 drives the thread sealing heads 38 connected with the end part of the shaft tube 34 to move to the valve port positions at the two ends of the internal thread valve through the L-shaped supporting plate 33, then the motor fixed on the side surface of the symmetrical L-shaped supporting plate 33 is controlled to synchronously rotate, the output shaft of the motor drives the connecting shaft tube 34 to rotate through the meshing of the driven gear 37 and the driving gear 36, at this time, the connecting shaft tube 34 can drive the thread sealing head 38 to rotate to the valve ports at two ends of the internal thread valve, and simultaneously, through the rotation of the double-rotation-direction screw rod 31, the rotating thread sealing head 38 can be driven to be in thread sealing connection with the thread valve ports at two ends of the valve body, so that the thread sealing connection of the valve ports at two ends of the internal thread valve is realized, then the PLC control system controls the air pump inside the workbench 1 to work, the air pressure pressurized by the air pump can be injected into the valve through the air guide tube 35 which is rotatably arranged in the connecting shaft tube 34, data is read from a pressure gauge, whether the air tightness at the other end is qualified is judged, and meanwhile, the valve disc above the valve can be twisted through the valve twisting mechanism 5, so that a ball core or a valve core inside the valve is rotated to be opened or closed, and the air tightness detection of the internal thread valve is further facilitated; after the airtightness detection of the internal thread valve is completed, a worker controls a motor on the left side of the workbench 1 to work through the PLC control system, and meanwhile controls a motor on the side face of the L-shaped support plate 33 to work, the motor on the workbench 1 can drive the symmetrical L-shaped support plate 33 to work towards the end faces on the left side and the right side of the workbench 1, and the motor on the side face of the L-shaped support plate 33 can drive the thread sealing head 38 to rotate reversely, so that the L-shaped support plate 33 moves, meanwhile, the thread sealing head 38 rotates reversely to be capable of being separated from the valve ports on the two ends of the internal thread valve, and the worker can take down the detected valve from the symmetrical support plate 2 to store the detected valve conveniently.

As an embodiment of the present invention, the detaching and connecting mechanism 4 includes a first clip strip 41, a second clip strip 42, a locking screw 43 and a locking disc 44, the end outer ring array of the connecting shaft tube 34 is provided with a plurality of first clip grooves 341, the inner ring wall circumference array of the screw sealing head 38 is provided with a plurality of first clip strips 41, the first clip strips 41 are slidably inserted into the first clip grooves 341, the outer ring wall array of the connecting shaft tube 34 close to the L-shaped support plate 33 is provided with a plurality of second clip strips 42, the inner ring surface of one side of the screw sealing head 38 close to the L-shaped support plate 33 is provided with a plurality of second clip grooves 381, the plurality of second clip grooves 381 are slidably sleeved outside the second clip strips 42, the plurality of first clip strips 41 and the plurality of second clip strips 42 are slidably aligned, the first clip strips 41 and the plurality of second clip strips 42 are provided with threaded holes 531 in the left-right horizontal direction, the plurality of threaded holes are all threadedly connected with the locking screw 43, the end surface of the connecting shaft tube 34 and the locking disc 44 is provided with the locking disc 44, and the locking disc 44 is fixed by the locking screw 43; when the air tightness detection is needed for the internal thread valves with different sizes, that is, the thread sealing head 38 at the end of the connecting shaft tube 34 needs to be replaced to correspond to the valve ports with different sizes, at this time, the worker needs to control the motor on the left side of the workbench 1 to work through the PLC control system, so that the symmetrical moving block 32 drives the symmetrical L-shaped support plates 33 to move towards the left and right sides of the workbench 1, and further the thread sealing head 38 moves towards the direction far away from the support plate 2, the worker then removes the plurality of locking screws 43 outside the locking disk 44 in order from the threaded holes 531 by means of the wrench, the locking disc 44 is then removed from the end faces of the threaded sealing head 38 and the connecting shaft tube 34, and the threaded sealing head 38 is then pushed, so that the first locking strip 41 on the inner circumferential surface of the screw sealing head 38 is pushed out from the first locking groove 341, meanwhile, the second locking strip 42 connected to the outer side surface of the shaft tube 34 is disengaged from the second locking groove 381, thereby facilitating the removal of the larger or smaller sized threaded sealing head 38 from the connecting shaft tube 34, the first plurality of locking strips 41 of the inner ring of the new threaded sealing head 38 are then aligned with the first plurality of locking slots 341 on the connecting shaft tube 34, and then the screw sealing head 38 is pushed continuously, so that the plurality of first clamping strips 41 can be inserted into the plurality of first clamping grooves 341 in a sliding manner, meanwhile, the second clamping strips 42 are slidably inserted into the second clamping grooves 381, and the second clamping strips 42 can play a role in positioning the pushed screw sealing head 38, so that, after the new threaded sealing head 38 is fully received on the connecting shaft tube 34, the operator then attaches the locking disc 44 to the end face of the connecting shaft tube 34, then, the plurality of locking screws 43 are sequentially screwed into the threaded holes 531, so that the threaded sealing head 38 on the connecting shaft tube 34 can be detached and replaced; therefore, through the sliding insertion fit of the first clamping strips 41 arranged on the inner ring of the thread sealing head 38 and the first clamping grooves 341 arranged on the outer ring of the connecting shaft tube 34, and the fit of the second clamping strips 42 arranged on the outer ring of the connecting shaft tube 34 and the second clamping grooves 381 arranged on the inner ring of the thread sealing head 38, the thread sealing head 38 can be slidably sleeved on the connecting shaft tube 34, meanwhile, the rotation of the connecting shaft tube 34 can drive the thread sealing head 38 to rotate, and the first clamping strips 41 and the second clamping strips 42 are matched with each other, so that the thread sealing head 38 can be limited in sliding, and the thread sealing head 38 is prevented from impacting the side surface of the L-shaped support plate 33 when sliding on the connecting shaft tube 34, and further the safe use of the thread sealing head 38 is influenced.

As an embodiment of the present invention, a spiral sealing strip 45 is disposed in the outer ring spiral groove of the thread sealing head 38, and the spiral sealing strip 45 is in the shape of an elastic rubber tube, and one end of the tubular spiral sealing strip 45 away from the end face of the connecting shaft tube 34 is communicated to the connecting shaft tube 34 through an air guiding groove; when the valve works, when the thread sealing head 38 is connected to the valve ports at two ends of the internal thread valve in a threaded manner, in order to prevent a gap from being formed between the thread sealing head 38 and the internal thread of the valve port of the valve, the phenomenon that high-pressure gas filled into the valve by the gas guide pipe 35 leaks from the gap is avoided; therefore, the spiral sealing strip 45 is arranged in the spiral groove of the thread sealing head 38, and when the thread sealing head 38 is connected into the valve port of the valve in a threaded manner, the spiral sealing strip can synchronously rotate into the valve port of the valve, so that the valve port of the valve can be sealed; meanwhile, after the high-pressure gas is introduced into the valve through the connecting shaft tube 34 by the gas guide tube 35, the gas in the connecting shaft tube 34 enters the elastic rubber tubular spiral sealing strip 45 through the gas guide groove, so that the spiral sealing strip 45 can expand in the thread sealing head 38 and the internal thread valve port, and the sealing effect of spiral sealing between the thread sealing head 38 and the internal thread valve port can be further improved; and after the high-pressure gas in the valve body is pumped out, the gas in the spiral sealing strip 45 can be pumped out through the gas guide groove, so that the threaded sealing head 38 can be conveniently separated from the internal thread valve port to be taken out.

As an embodiment of the present invention, the valve torsion mechanism 5 includes a support frame 51, a rotating shaft 52, a torsion disc 53 and a torsion screw 54, the support frame 51 is fixedly disposed on the rear side surface of the workbench 1, the top end surface of the support frame 51 is vertically and rotatably provided with the rotating shaft 52, the upper end of the rotating shaft 52 is connected with a motor output shaft fixedly disposed on the top end surface of the support frame 51, the lower end surface of the rotating shaft 52 penetrates through the support frame 51 and is connected with the torsion disc 53 through an electric push rod, and the torsion disc 53 is provided with a plurality of torsion screws 54; when the valve rod of the valve fixedly supported above the supporting plate 2 needs to be rotated to be opened, at the moment, a worker can control the telescopic rod of the electric push rod on the upper surface of the torsion disc 53 to extend out through the PLC control system, so that the telescopic rod can drive the torsion screw rod 54 to be inserted into the rotary handle above the valve rod through the torsion disc 53, then the motor on the upper surface of the supporting frame 51 is started, an output shaft of the motor can drive the torsion disc 53 to rotate through the rotating shaft 52, further the torsion screw rod 54 is driven to rotate in the rotary handle, the rotary handle is continuously twisted, and further the valve rod is driven to rotate to open and penetrate through the valve; after the valve is detected, if the valve core needs to be closed, the motor is driven reversely, so that the torsion disc 53 can drive the torsion screw 54 to rotate the valve rod reversely, and the valve core can be closed; then the telescopic rod of the electric push rod is controlled to contract, and the torsion screw 54 is driven by the torsion disc 53 to be separated from the rotating handle, so that the valve can be conveniently taken down from the support plate 2.

As an embodiment of the present invention, the torsion plate 53 is provided with a plurality of threaded holes 531, and the plurality of threaded holes 531 are correspondingly and threadedly connected with torsion screws 54; during operation, twist reverse screw rod 54 demountable installation in the screw hole 531 of twisting the dish 53 for the staff can be according to the kind of the rotatory handle in valve rod top, say that different quantity twist reverse screw rod 54 installs in the screw hole 531 of twisting the dish 53, and then be convenient for valve torsion mechanism 5 can twist reverse the different kinds of handles in the valve top.

The working principle is as follows: when the air tightness of a valve placed above the supporting plate 2 needs to be detected, a worker controls a motor on the left side of the workbench 1 to work through a PLC control system, an output shaft of the motor drives the double-screw-direction lead screw 31 to rotate, the double-screw-direction lead screw 31 drives the symmetrical moving block 32 to move towards the direction of the supporting plate 2 through a lead screw nut, the moving block 32 drives the thread sealing heads 38 at the end part of the connecting shaft tube 34 to move to valve port positions at two ends of the internal thread valve through the L-shaped support plate 33, then the motor fixed on the side surface of the symmetrical L-shaped support plate 33 is controlled to rotate synchronously, the output shaft of the motor drives the connecting shaft tube 34 to rotate through the meshing of the driven gear 37 and the driving gear 36, at the moment, the connecting shaft tube 34 drives the thread sealing heads 38 to rotate to valve ports at two ends of the internal thread valve, meanwhile, the rotating thread sealing heads 38 are driven to be connected to the thread valve ports at two ends of the valve body in a sealing manner through the rotation of the double-screw-direction lead screw 31, further, the valve ports at two ends of the internal thread valve are connected in a thread sealing manner, then the valve is controlled to work by the PLC control system, the air pressure of the air pump is controlled by the air pump, and the valve, and whether the air valve is opened by the valve core, and the valve is convenient for detecting valve disc, and the air tightness detecting valve is convenient for the detection of the valve, and the air valve, and the qualified valve disc is opened by the detection valve, and the qualified valve disc is detected by the detection valve core 5 for the detection valve; after the internal thread valve airtightness detection is completed, a worker controls the work of a motor on the left side of the workbench 1 through the PLC control system, and controls the work of a motor on the side surface of the L-shaped support plate 33 at the same time, the work of the motor on the workbench 1 can drive the symmetrical L-shaped support plate 33 to work towards the end faces on the left side and the right side of the workbench 1, and the work of the motor on the side surface of the L-shaped support plate 33 can drive the thread sealing head 38 to reversely rotate, so that the L-shaped support plate 33 moves, and meanwhile, the thread sealing head 38 can be separated from valve ports at two ends of the internal thread valve in a reverse rotation mode, and the valve which is completed by the worker can be conveniently taken down from the symmetrical support plate 2 for storage.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a valve gas tightness detection device, includes workstation (1), its characterized in that, workstation (1) upper surface middle part position symmetry is provided with backup pad (2), backup pad (2) are used for supporting the valve and place, the upper surface of workstation (1) is provided with thread sealing detection mechanism (3), thread sealing detection mechanism (3) are used for sealing up the detection to having the internal screw thread valve, workstation (1) one side top is provided with valve torsion mechanism (5), valve torsion mechanism (5) are used for driving the hand wheel of valve body top and twist reverse.

2. The valve airtightness detection apparatus according to claim 1, wherein: the thread sealing detection mechanism (3) comprises a double-rotation-direction screw rod (31), a moving block (32), an L-shaped support plate (33), a connecting shaft tube (34), an air guide tube (35), a driving gear (36), a driven gear (37) and a thread sealing head (38), a guide groove is formed in the left-right horizontal direction on the upper surface of the workbench (1), and a double-rotation-direction screw rod (31) is rotationally arranged in the guide groove, moving blocks (32) are symmetrically sleeved on the double-rotation-direction screw rod (31) through screw rod nuts, and the symmetrical moving blocks (32) are positioned at the outer side of the supporting plate (2), the upper surface of the moving block (32) is connected with an L-shaped support plate (33), a connecting shaft tube (34) is rotatably arranged on the vertical plate of the L-shaped support plate (33) through a bearing, and the air duct (35) is rotatably inserted in the connecting shaft tube (34), the outer wall of the connecting shaft tube (34) is fixedly sleeved with a driving gear (36), and a driven gear (37) is meshed below the driving gear (36), the left side surface of the driven gear (37) is connected to an output shaft of the motor, and the motor is fixed to the vertical plate side surface of the L-shaped support plate (33), the end outer ring surface of the connecting shaft tube (34) is provided with a thread sealing head (38) through a dismounting connecting mechanism (4), and the thread sealing head (38) is in threaded connection with the two ends of the valve with the internal thread.

3. The valve airtightness detection apparatus according to claim 2, wherein: dismantle coupling mechanism (4) and include first calorie of strip (41), second card strip (42), locking screw (43) and locking dish (44), a plurality of first draw-in grooves (341) have been seted up to the tip outer lane array of connecting central siphon (34), the inner circle wall circumference array of thread sealing head (38) has a plurality of first calorie of strips (41), and in first calorie of strip (41) sliding insertion first draw-in groove (341), it has a plurality of second calorie of strips (42) to set up to connect central siphon (34) to be close to the outer lane wall array of L type extension board (33), thread sealing head (38) are close to one side inner circle face of L type extension board (33) and have seted up a plurality of second draw-in grooves (381), and a plurality of second calorie of strips (381) slip and cup joint outside second calorie of strip (42), and a plurality of first calorie of strips (41) and a plurality of second calorie of strips (42) all slide and align, and control the horizontal direction and set up locking strip (42) about first calorie of strip (41) and set up the horizontal direction, and a plurality of thread sealing rod (44) all slide and align, and the locking dish (531), a plurality of locking screw hole (44) is provided with locking dish (44), and locking screw hole (44) through locking dish (44), a plurality of contact screw hole (44), and locking dish (44) and locking screw hole (44).

4. The valve airtightness detection apparatus according to claim 2, wherein: the spiral sealing strip (45) is arranged in a spiral groove of the outer ring of the thread sealing head (38), the spiral sealing strip (45) is elastic rubber tubular, and the end, far away from the end face of the connecting shaft tube (34), of the spiral sealing strip (45) is communicated to the connecting shaft tube (34) through an air guide groove.

5. The valve airtightness detection apparatus according to claim 1, wherein: valve torsion mechanism (5) are including carriage (51), axis of rotation (52), twist reverse dish (53) and twist reverse screw rod (54), carriage (51) fixed setting is at the trailing flank of workstation (1), and the vertical rotation of the top face of carriage (51) is provided with axis of rotation (52), the upper end of axis of rotation (52) and the fixed motor output shaft who sets up of carriage (51) top end face, and the lower terminal surface of axis of rotation (52) passes carriage (51) and is connected with twist reverse dish (53) through electric putter, be provided with a plurality of torsion screws (54) on twist reverse dish (53).

6. The valve airtightness detection apparatus according to claim 5, wherein: a plurality of threaded holes (531) are formed in the torsion disc (53), and torsion screws (54) are connected in the threaded holes (531) in a corresponding threaded mode.