CN220891168U - Isolation valve capable of providing external pressure - Google Patents

Abstract

The application relates to an isolation valve capable of providing external pressure, which comprises a valve body, an isolation valve clack, a valve rod and a gas source communication part. The medium channel extends into the air source communicating part. The air source communicating part is provided with an air source through hole which is communicated with the medium channel and the outside, the air source communicating part is provided with an air source plug at the air source through hole, the air source plug is matched with the air source through hole and is used for blocking the air source through hole, the air source plug is internally provided with the air source channel from the outer surface, the air source channel can be externally connected with air source pressure, and the air source pressure is used for controlling the on-off of the air source channel. The scheme provided by the application can facilitate a user to open the pilot valve by introducing an external air source, thereby realizing quick opening of the main valve.

Description

Isolation valve capable of providing external pressure

Technical Field

The present application relates to the field of valves, and more particularly to an isolation valve capable of providing external pressure.

Background

Currently, isolation valves are used to treat fluids, to achieve interruption and conduction during the delivery of fluid media, and to prevent the media from flowing to a given location, typically in a service setting requiring maintenance, or for safety purposes. Currently, when a main valve is opened, the pressure at two ends of a valve clack of the main valve needs to be controlled, and the valve clack of the main valve moves towards one end of the main valve to be opened, so that pressure difference between the two ends of the valve clack of the main valve needs to be controlled, namely, the pressure of the valve clack of the main valve along the opening end is controlled to be reduced, or the pressure of the other end of the valve clack of the main valve is controlled to be increased. In the actual use process, if the pressure at the end of the valve clack of the main valve along the closing direction is increased by means of medium flow rate and the like, the problem of slow opening of the main valve can be caused.

In order to solve the above-mentioned problem of slow opening of the main valve, there is a pilot valve in the related art, which is in communication with a medium passage at one end of the main valve flap in the opening direction and is used for rapidly reducing the pressure at the one end of the main valve flap in the opening direction, thereby increasing the opening speed of the main valve.

However, the opening process of the pilot valve in the related art is usually complicated, and in the actual use process, the problem of inconvenient operation often occurs when the user performs offline setting pressure verification.

Aiming at the situation, the application provides the isolation valve capable of providing the external pressure, which is used for improving the convenience of the pilot valve in the process of off-line setting pressure verification of the isolation valve.

Disclosure of utility model

In order to improve the convenience of pilot valve use during off-line setting pressure verification of the isolation valve, the application provides the isolation valve capable of providing external pressure.

The application provides an isolation valve capable of providing external pressure, which adopts the following technical scheme:

The utility model provides an isolation valve that can provide external pressure, includes valve body, isolation valve clack, valve rod and air supply intercommunication portion, be formed with pan feeding mouth and discharge gate on the valve body, the pan feeding mouth with the discharge gate is linked together and in be formed with the medium passageway in the valve body, isolation valve clack is located be used for cutting off in the medium passageway, the one end of valve rod is connected isolation valve clack and is used for opening and closing the isolation valve, air supply intercommunication portion form on the valve body and with valve body coupling, just the medium passageway extends into in the air supply intercommunication portion, be formed with the air supply through-hole on the air supply intercommunication portion, the air supply through-hole will the medium passageway is linked together with the external world, the air supply intercommunication portion in air supply through-hole department is provided with the air supply stopper, the air supply stopper with air supply through-hole assorted and be used for stopping up the air supply through-hole, the air supply stopper is inwards offered by the surface air supply passageway, air supply passageway department can external air supply pressure, and pressure is used for controlling the break-make of air supply passageway.

Through adopting above-mentioned technical scheme, after the isolation valve is opened, the medium gets into and passes through the medium passageway and reach the discharge gate by the feed inlet to in the follow-up device is got into by the discharge gate, and after the isolation valve was closed, the isolation valve clack was with the medium separation in the medium passageway, makes the medium can't reach the discharge gate, and the isolation valve clack of here should adopt the outstanding material of sealing performance, makes isolation valve clack and valve body can form sealed separation body.

When a user needs to be introduced with an external air source to open the pilot valve, the user can communicate the medium channel with the outside through the external air source pressure, so that the medium flow speed in the medium channel is increased, the pressure at one end of the valve clack of the pilot valve is increased to open the pilot valve, and after the pilot valve is opened, the pressure in the medium channel at one end of the valve clack of the main valve along the opening direction is rapidly reduced, and the main valve can be rapidly opened.

In addition, the structure can also allow a user to conveniently acquire various parameters of the flow rate of the medium, the pressure of the medium on the valve body and the medium at any time.

Optionally, the air source plug includes flange plug, spring holder, air source intercommunication valve clack and sealing spring, the flange plug includes ring flange and installation pole, the ring flange with the installation pole is integrative to be set up, the ring flange butt in air source intercommunication portion and cover in on the air source through-hole, the installation pole is gone into the medium passageway sets up, spring holder fixed mounting in the medium passageway, the installation pole keep away from the one end butt of ring flange in on the spring holder, the surface of flange plug in on the axis of installation pole follow the axis of installation pole is to being close to the direction of spring holder is seted up the air source passageway, a plurality of base intercommunicating pore has been seted up on the spring holder, a plurality of base intercommunicating the medium passageway with the air source passageway, the air source intercommunication valve clack set up with in the air source passageway and be used for cutting off the air source passageway, sealing spring's both ends respectively fixed connection in the spring holder with on the air source intercommunication valve clack.

By adopting the technical scheme, when an external air source is required to be introduced, a user can access the air source from the outside and push the air source communication valve clack towards the inside of the medium channel, and then the sealing spring compresses, and the air source communication valve clack can communicate the medium channel with the outside, and then the user can introduce the external air source from the air source channel as a pressure source for increasing the pressure in the pilot valve, so that the pilot valve is opened, the pressure of one end of the main valve clack along the opening direction is reduced, and the main valve is quickly opened; after the use is finished, the user only needs to remove the external force of the movable sealing spring, so that the sealing spring is restored to the initial state, and the air source communication valve clack can be returned to the initial state again, namely, the medium channel and the external space are blocked.

Optionally, the air source communication part forms the first annular step of having seted up around to the medium passageway on the inner wall of air source through-hole, spring holder and first annular step phase-match and butt set up on first annular step, the installation pole keep away from the one end butt of ring flange in on the spring holder and will the spring holder compress tightly on the first annular step.

Through adopting above-mentioned technical scheme, the one end butt of spring holder is on first annular step, and the one end that is opposite with it is continuous with the one end that the installation pole penetrated the medium passageway, consequently, when the installation pole was fixed in on the installation department, can compress tightly the spring holder on above-mentioned first annular step for spring holder and valve body are fixed relatively.

Optionally, the installation pole is close to the one end inner wall of spring holder sets up the annular step of second to all around, air supply intercommunication valve clack butt in set up on the annular step of second, the spring coupling in on the air supply intercommunication valve clack be used for with air supply intercommunication valve clack compress tightly in on the annular step of second.

Optionally, a plurality of valve clack communication holes are formed in the position, abutting against the second annular step, of the air source communication valve clack, and the plurality of valve clack communication holes are used for communicating the two sides of the air source communication valve clack in the axial direction of the mounting rod.

By adopting the technical scheme, when the valve is used, a user can push the air source communication valve clack towards the inside of the medium channel from the outside, the sealing spring is compressed at the moment, and the air source communication valve clack is separated from the second annular step, so that the medium channel and the external space can be communicated by the valve clack communication hole, and at the moment, the user can introduce an external air source from the air source channel to open the main valve; after the use is finished, the user only needs to remove the external force of the movable sealing spring, so that the sealing spring is restored to the initial state, the air source communication valve clack can be abutted against the second annular step again, and then the air source communication valve clack separates the medium channel from the external space.

Optionally, the one end that the air supply intercommunication valve clack is close to the ring flange is the frustum form, the side butt of air supply intercommunication valve clack frustum form part in be used for cutting off on the edge of second annular step the air supply passageway, the air supply intercommunication valve clack is close to the side of spring holder one end with the installation pole is used for forming be formed with the clearance that supplies the medium to circulate between the inner wall of air supply passageway.

Through adopting above-mentioned technical scheme, when using, the user can follow outside with air supply intercommunication valve clack towards inside the medium passageway promote, at this time, the sealing spring compresses, and the air supply intercommunication valve clack will leave above-mentioned second annular step, the side of air supply intercommunication valve clack and the sealed state that the edge of second annular step formed will be broken, make outside air supply can get into in the air supply passageway through the week side of air supply intercommunication valve clack round platform form part, and make the medium in the air supply passageway can follow the week side flow direction outside space of above-mentioned air supply intercommunication valve clack round platform form part, realize the intercommunication of air supply passageway and outside space, after the use, the user only need remove the external force that removes sealing spring, make the spring resume initial state can with the air supply intercommunication valve clack butt again on above-mentioned second annular step and keep sealed state.

Optionally, the air source communicating part further comprises an air source plug screw, and the air source plug screw penetrates into the air source channel from the outer surface of the flange plate and is used for blocking the air source channel.

By adopting the technical scheme, under the condition that an external air source is not required to be introduced, a user can use the air source screw plug to block the air source channel, so that the sealing structure of the air source communication valve clack and the second annular step is protected from being damaged.

Optionally, a seal groove is formed on the air source communicating portion, the seal groove is formed on a surface of the air source communicating portion, which is in contact with the flange plate, a seal ring matched with the seal groove is formed on the flange plate, and the seal ring is formed on a surface of the flange plate, which is in contact with the air source communicating portion.

Through adopting above-mentioned technical scheme, the sealing ring penetrates the seal groove and sets up the leakproofness that can strengthen between ring flange and the air supply intercommunication portion in, further guarantees that the medium in the medium passageway can not flow by the edge of air supply intercommunication portion.

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

1. The user can be linked together medium passageway and external through the mode of external air supply pressure to increase the medium velocity of flow in the medium passageway, and then increase the pressure of pilot valve clack one end and be used for opening the pilot valve, after the pilot valve is opened, because the medium passageway pressure of main valve clack along opening direction one end will reduce fast, the main valve can realize quick opening.

2. The structure provided by the application can also allow a user to conveniently acquire various parameters of the flow rate of the medium, the pressure of the medium on the valve body and the medium at any time.

3. The on-off of the air source channel is realized through the structure of the sealing spring matched with the air source communication valve clack, so that a user can conveniently and immediately input an external air source to open the pilot valve.

4. The user can use the air supply plug screw to block up the air supply passageway to the seal structure of above-mentioned air supply intercommunication valve clack and second annular step is not destroyed, and has played the effect of secondary seal guarantee.

5. The sealing ring penetrates into the sealing groove, so that the tightness between the flange plate and the air source communicating part can be enhanced, and the medium in the medium channel is further ensured not to flow out from the edge of the air source communicating part.

Drawings

Fig. 1 is an overall cross-sectional view of an isolation valve in accordance with an embodiment of the present application.

Fig. 2 is an enlarged view of fig. 1 with part a hidden in the figure, according to an embodiment of the present application.

FIG. 3 is a cross-sectional view of the locking structure of FIG. 1 in the E-E direction, in accordance with an embodiment of the present application.

Fig. 4 is an exploded view of fig. 3 in an embodiment of the present application.

Fig. 5 is a cross-sectional view of the locking structure of fig. 1 in the direction F-F in accordance with an embodiment of the present application.

Fig. 6 is an enlarged view of embodiment of the present application at B in fig. 1.

Reference numerals illustrate:

1. A valve body; 11. a feed inlet; 12. a discharge port; 13. a media channel; 2. isolating the valve flap; 3. a valve stem; 4. lifting the round rod; 41. a locking part; 42. a valve stem nut; 421. a nut cap; 43. a connecting rod; 5. a fixed sleeve; 51. a nut cavity; 511. thrust needle roller and cage assembly; 52. a second limit part; 521. the second limiting cavity; 53. a recess; 54. a filler cavity; 55. a bracket; 6. a second limiting piece; 61. the first limiting clamp plate; 62. the second limiting clamp plate; 7. a locking structure; 71. a lock case; 711. lifting the through hole; 712. a locking groove; 713. a first limit groove; 714. an anti-drop groove; 715. a fixing groove; 72. a locking member; 721. a notch; 722. a lock core; 723. a key; 724. anti-falling ball; 725. an anti-drop bolt; 73. a first limit post; 731. a pin shaft; 732. an elastic cylindrical pin; 8. a seal assembly; 9. an air source communicating part; 91. an air source through hole; 911. a first annular step; 92. an air source plug; 921. a flange plug; 9211. a flange plate; 9212. a mounting rod; 9213. a seal ring; 9214. a second annular step; 9215. an air source channel; 922. a spring seat; 9221. a base communicating hole; 923. the air source is communicated with the valve clack; 924. a seal spring; 93. a screw plug; 94. and (5) sealing the groove.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. As part of this specification, some of the drawings of the present disclosure represent structures and devices in block diagram form in order to avoid obscuring the principles of the disclosure. In the interest of clarity, not all features of an actual implementation are necessarily described. Reference in the present disclosure to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and multiple references to "one embodiment" or "an embodiment" should not be understood as necessarily all referring to the same embodiment.

The terms "a," "an," and "the" are not intended to refer to a singular entity, but rather include the general class of which a particular example may be used for illustration, unless clearly defined. Thus, the use of the terms "a" or "an" may mean any number of at least one, including "one", "one or more", "at least one", and "one or more than one". The term "or" means any of the alternatives and any combination of alternatives, including all alternatives, unless alternatives are explicitly indicated as mutually exclusive. The phrase "at least one of" when combined with a list of items refers to a single item in the list or any combination of items in the list. The phrase does not require all of the listed items unless specifically so defined.

The embodiment of the application discloses a locking structure and an isolation valve with the same. Referring to fig. 1 and 2, an isolation valve comprises a valve body 1, an isolation valve clack 2, a valve rod 3, a lifting round rod 4 and a locking structure 7, wherein a feed inlet 11 and a discharge outlet 12 are formed on the valve body 1, the feed inlet 11 and the discharge outlet 12 are communicated and a medium channel 13 is formed in the valve body 1, and the isolation valve clack 2 is positioned in the medium channel 13 and used for isolating the medium channel 13.

Specifically, when the isolation valve is opened, the medium enters from the feed inlet and passes through the medium channel 13 to reach the discharge outlet 12, so that the medium enters from the discharge outlet 12 into the subsequent device, and when the isolation valve is closed, the isolation valve clack 2 blocks the medium in the medium channel 13, so that the medium cannot reach the discharge outlet 12, and the isolation valve clack 2 is made of a material with excellent sealing performance, so that the isolation valve clack 2 and the valve body 1 can form a sealed blocking body. In different embodiments, the isolation valve clack 2 and the valve body 1 may be in contact in different manners, where the isolation valve clack 2 can be tightly abutted to the inner wall of the medium channel 13 of the valve body 1, so that the isolation valve clack 2 and the valve body 1 form a closed barrier, and as an example, the isolation valve clack 2 and the valve body 1 may be in transition fit connection and a sealing material is disposed on the surface of the isolation valve clack 2 to improve the stability of the sealing structure.

In addition, in different embodiments, the isolation valve clack 2 and the valve rod 3 may be connected in different manners, but the valve rod 3 may be capable of driving the isolation valve clack 2 to move up and down along the axis of the valve rod 3, and the present application specifically, but not limited thereto, provides a scheme in which a valve rod groove is formed at one end of the isolation valve clack 2 far away from the medium channel 13, and the valve rod groove is in transition fit with the contact portion between the valve rod 3 and the isolation valve clack 2, and when the isolation valve is installed, a user inserts the valve rod 3 into the isolation valve clack 2 in a rotating manner, so that the connection between the isolation valve clack 2 and the valve rod 3 can be achieved.

Correspondingly, in different embodiments, the valve rod 3 and the lifting round rod 4 may be connected in different manners, so that the lifting round rod 4 can drive the valve rod 3 to move up and down along the axial direction, as an example, the valve rod 3 and the lifting round rod 4 may be integrally connected, and considering that the isolation valve clack 2 and the valve rod 3 are connected by adopting the above method, since the lifting round rod 4 needs to rotate around its own axis to realize up and down movement along the axial direction, the application specifically but not limited to provides another connection manner: the valve rod 3 and the lifting round rod 4 are coaxially arranged and detachably connected with each other, so that the rotation of the valve rod 3 can be avoided, and the service life of the isolation valve is prolonged.

With continued reference to fig. 1 and 2, the lifting round rod 4 includes a valve rod nut 42 and a connecting rod 43, the valve rod nut 42 is disposed around the connecting rod 43 and is rotationally connected with the connecting rod 43, an inner thread is formed on an inner wall of the valve rod nut 42, an outer thread matched with the inner thread is formed on an outer surface of the connecting rod 43, the fixed sleeve 5 is relatively fixed with the valve body 1, the valve rod nut 42 and the fixed sleeve 5 are relatively fixed in an axial direction of the valve rod nut 42, and a nut cap 421 of the valve rod nut 42 is rotationally connected with the fixed sleeve 5. The valve stem nut 42 is screwed with the connecting rod 43, and the nut cap 421 of the valve stem nut 42 is rotatably connected with the fixing sleeve 5 fixed to the valve body 1, so that the positions of the valve stem nut 42 and the valve body 1 are relatively fixed in the axial direction of the valve stem nut 42, and a user can open and close the isolation valve by rotating the valve stem nut 42.

In view of the above, in different embodiments, the valve rod nut 42 and the fixing sleeve 5 may be connected by different manners, and the present application particularly, but not limited to, provides a scheme that a nut cavity 51 is formed inside the fixing sleeve 5, a nut cap 421 of the valve rod nut 42 is disposed in the nut cavity 51, one end of the nut cavity 51 far away from the locking structure 7 is provided with a thrust needle and retainer assembly 511, and the thrust needle and retainer assembly 511 is rotationally connected with an end face of the nut cap 421 of the valve rod nut 42. The thrust needle roller and cage assembly 511 is a bearing that mainly receives axial force, can receive unidirectional axial load, has high bearing capacity, and has advantages of small axial section height, installation space saving and easy installation. Accordingly, mounting the thrust needle and cage assembly 511 to the region of the valve stem nut 42 where the nut cap 421 contacts the retaining sleeve 5 can extend the useful life of the valve stem nut 42 while reducing friction and reducing the torque required to open or close the isolation valve.

With continued reference to fig. 1 and 2, in order to limit the movement range of the lifting round rod 4, so that the lifting round rod 4 cannot move too far to cause time and energy waste, the present application provides a specific but non-limiting scheme, a second limiting part 52 is formed on the fixing sleeve 5, the second limiting part 52 is disposed around the connecting rod 43 and is matched with the connecting rod 43, the second limiting part 52 is slidably connected with the connecting rod 43 in the axial direction of the connecting rod 43, a prismatic second limiting cavity 521 is formed around the connecting rod 43 by the second limiting part 52, a second limiting part 6 is fixedly connected with the connecting rod 43 in the circumferential direction, and the second limiting part 6 is disposed in the second limiting cavity 521. In the process of moving the connecting rod 43 up and down along the axis thereof, the second limiting piece 6 moves up and down along the axis thereof inside the second limiting cavity 521, the second limiting piece 6 cannot be separated from the second limiting cavity 521 due to the matching of the second limiting part 52 and the connecting rod 43, and the second limiting piece 6 is limited in the second limiting cavity 521 by the second limiting part 52 due to the relative fixation of the second limiting piece 6 and the connecting rod 43, so that the moving range of the connecting rod 43 is limited in the length range of the second limiting cavity 521, and the connecting rod 43 cannot move too much distance to cause waste of time and energy.

In view of the above, in different embodiments, the second limiting member 6 may be formed by different parts, and may be relatively fixed with the lifting round rod 4 to perform a limiting function, and the present application particularly, but not limited thereto, provides a scheme in which the second limiting member 6 includes a first limiting clamping plate 61 and a second limiting clamping plate 62, and the first limiting clamping plate 61 and the second limiting clamping plate 62 are mutually buckled to clamp the connecting rod 43 and are relatively fixed with the connecting rod 43. The second limiting piece 6 is formed by mutually buckling the first limiting clamping plate 61 and the second limiting clamping plate 62, so that a user can easily detach the second limiting piece 6, and the problem that the second limiting piece 6 cannot be sleeved from one end of the connecting rod 43 is solved.

With continued reference to fig. 1 and 2, in order to limit the rotation of the connecting rod 43 and make it more convenient to open and close the isolation valve by rotating the valve stem nut 42, the present application specifically, but not by way of limitation, proposes a solution, in which, for the case that the second limiting cavity 521 is prismatic, the second limiting member 6 is formed with a plurality of abutment side surfaces, and at least one abutment side surface is attached to the inner wall of the second limiting portion 52 for forming the second limiting cavity 521. Because the second limiting cavity 521 is prismatic, when the abutting side surface of the second limiting member 6 abuts against the second limiting portion 52 to form the inner wall of the second limiting cavity 521, the connecting rod 43 cannot rotate around its own axis, so as to limit the rotation of the connecting rod 43, and make it more convenient to open and close the isolation valve by rotating the valve stem nut 42.

Referring to fig. 1 and 3, a locking structure 7 is attached to the end of the lifting round bar 4 remote from the valve stem 3, the locking structure 7 serving to prevent the lifting round bar 4 from rotating about its own axis, thereby locking the isolation valve. Specifically, the locking structure 7 includes a lock housing 71, a lifting round rod 4, a locking member 72, a fixing sleeve 5 and a first limiting post 73, the lock housing 71 is perforated with a lifting through hole 711, the lifting through hole 711 is matched with the lifting round rod 4, the lifting round rod 4 passes through the lifting through hole 711 and is rotationally connected with the lock housing 71, the lifting round rod 4 rotates around the axis thereof in the lifting through hole 711 to open the isolation valve, a locking part 41 is formed by protruding outwards along the radial direction on the side surface of the lifting round rod 4, which is in contact with the lock housing 71, the cross section of the locking part 41 perpendicular to the axis of the lifting round rod 4 is regular polygon, the smallest circumcircle diameter of the regular polygon is matched with the diameter of the lifting through hole 711, a locking groove 712 is formed on the lock housing 71, the locking groove 712 is cylindrically arranged, the locking piece 72 is matched with the locking member 72, the locking member 72 penetrates into the locking groove 712 and is rotationally connected with the lock housing 71, the lifting through hole 711 is communicated with the locking groove 712, the locking member 72 is abutted to the surface of the locking part 41, the locking member 72 is formed on the side surface of the locking part 41, the cross section of the lifting round rod 4 is perpendicular to the axis of the lifting round rod 4, the cross section of the lifting round rod is regular polygon, the smallest circumscribing circle diameter of the lifting round rod is matched with the lifting round rod, the lifting round rod is round rod 5, and the locking member 721 is located on the circular sleeve 5, and the circular hole 5 is located around the fixing sleeve 5, and the fixing notch 5 is located around the fixing sleeve 5, and is opposite to the fixing notch 5, and is located on the opposite side surface, and is opposite to the side surface, and is located on the side surface 5. Referring to the cross-sectional view shown in fig. 5, if the center of the connecting rod 43 is used as the center, the central angle corresponding to the recess 53 is greater than or equal to the central angle corresponding to any one of the edges of the locking portion 41 and is smaller than the sum of the central angles corresponding to any two adjacent edges of the locking portion 41, a first limiting groove 713 is formed in the lock shell 71 along the direction perpendicular to the axis of the lifting round rod 4, the first limiting groove 713 is matched with the first limiting post 73, the first limiting post 73 penetrates into the first limiting groove 713 and is slidably connected with the lock shell 71, the first limiting groove 713 is communicated with the lifting through hole 711, and the first limiting post 73 is arranged through the recess 53.

When the isolation valve needs to be locked, a user can rotate the locking piece 72 to enable the locking piece 72 to be abutted against the edge surface of the locking part 41 of the lifting round rod 4, so that the notch 721 on the locking piece 72 rotates to a position deviating from the locking part 41, the edge of the locking part 41 is blocked outside the locking groove 712 by the blocking piece 72, the locking part 41 cannot rotate around the axis, and therefore the valve rod nut 42 cannot rotate around the axis to enable the isolation valve to be opened.

When it is necessary to unlock the isolation valve, the user communicates the notch 721 of the locking piece 72 with the lifting through hole 711 by rotating the locking piece 72, and the rib of the locking portion 41 can pass through the notch 721, so that the locking portion 41 can rotate about its own axis, and thus, the user can open the isolation valve by rotating the valve stem nut 42.

It should be noted that, after the isolation valve is opened, the axis of the locking portion 41 may rotate to the locking groove 712 during operation, if the isolation valve is opened when the locking member 72 is not inserted into the locking groove 712, since the valve stem nut 42 rotates around its axis, the axis of the locking portion 41 is likely to stay in the locking groove 712 and is in the moving path of the locking member 72 penetrating the locking groove 712, which will result in that the user cannot insert the locking member 72 into the locking groove 712 to complete the above operation when the user needs to lock the isolation valve.

At this time, through the above-mentioned scheme, the user can find the position for inserting the locking piece 72 by rotating the lock shell 71, and because of the cooperation relationship between the first limiting post 73 and the recess 53, the first limiting post 73 will abut against the bottom surface of the recess 53, when the lock shell 71 drives the first limiting post 73 to rotate to the edge of the recess 53, the rotation angle of the lock shell 71 is limited to be equal to or greater than the central angle corresponding to one of the edges of the locking portion 41 and less than the range of the sum of the central angles corresponding to two adjacent edges of the locking portion 41, therefore, the user can find the penetrating angle of the locking piece 72 by only shaking the lock shell 71 in a smaller range, and further realize the locking of the isolation valve.

In different embodiments, the locking groove 712 may be opened in different directions, and the following embodiments may be provided, specifically but not limited to the following embodiments, in which the locking groove 712 and the lifting through hole 711 may be connected and the locking member 72 may abut against the edge surface of the locking portion 41: the lifting through hole 711 has a mounting position formed therein, the shape of the mounting position being adapted to the shape of the locking portion 41, and it should be noted that the mounting position in the lifting through hole 711 refers to a part of the space in the lifting through hole 711, which is a relatively fixed part of the space with the lock case 71 as a reference, and the locking portion 41 is disposed in the mounting position when the locking portion 41 is in the initial position. It should be noted that the locking portion 41 will be intermittently deviated from the mounting position when the locking portion 41 rotates following the connecting rod 43. The locking groove 712 is opened in a direction parallel to the land of the installation site and perpendicular to the axis of the lifting round bar 4, the locking piece 72 penetrates the locking groove 712 to be arranged and rotationally connected with the lock shell 71, and the side surface of the locking piece 72 abuts against the land of the installation site and is formed with a notch 721.

In addition, a proposal is provided: the locking groove 712 is formed in a direction perpendicular to the edge surface of the locking portion 41, the locking member 72 penetrates the locking groove 712 and is rotatably connected with the lock housing 71, the end surface of the locking member 72 at the bottom of the locking groove 712 abuts against the edge surface of the locking portion 41, and a notch 721 is formed in the area where the end surface of the locking member 72 at the bottom of the locking groove 712 is rotatably swept around the axis thereof.

In view of the first aspect, in different embodiments, the locking member 72 may be composed of different parts, but only if the locking member can penetrate into the locking groove 712 and be rotatably connected to the locking groove 712, and the notch 721 is provided for the prism surface of the locking portion 41 to pass through, the present application specifically, but not limited to, proposes a composition structure: the locking member 72 includes a key 723 and a lock cylinder 722, the lock cylinder 722 is cylindrical and is rotatably connected with the lock housing 71, a notch 721 is formed on a side surface of the lock cylinder 722, a key hole matched with the key 723 is formed in the lock cylinder 722 along the direction of the axis of the lock cylinder 722 toward the inside of the lock housing 71, and the key 723 is used for penetrating the key hole and driving the lock cylinder 722 to rotate around the axis of the lock cylinder 722. When the isolation valve needs to be locked, a user can insert a key 723 into a key hole in the lock cylinder 722 to open the lock cylinder 722, at this time, the lock cylinder 722 can rotate around the axis thereof, so that the notch 721 is opposite to the edge surface of the locking piece 72, and the edge surface of the locking piece 72 can pass through the notch 721, at this time, the user can rotate the lifting round rod 4 to open the isolation valve; when the isolation valve needs to be unlocked, a user can rotate the lock cylinder 722 to the installation position by using the key 723, namely, the side face of the lock cylinder 722 is abutted to the edge face of the locking part 41, so that the locking part 41 cannot rotate around the axis of the lock cylinder 41, after that, the key 723 is pulled out, the lock cylinder 722 cannot rotate, and only after the key 723 is inserted again, the lock cylinder 722 can be rotated again, thereby enhancing the locking effect of the isolation valve and improving the safety. In addition, in order to meet the requirement that only two keys 723 can unlock the isolation valve after both lock cylinders 722 are opened, so that the safety is further improved.

In order to prevent the locking member 72 from falling out of the locking groove 712, the present application proposes a specific but non-limiting scheme, the locking structure 7 further comprises a falling-off ball 724 and a falling-off bolt 725, the locking shell 71 is provided with a fixing groove 715 along the direction perpendicular to the axis of the lock cylinder 722, the falling-off bolt 725 penetrates into the fixing groove 715, the side surface of the lock cylinder 722 is provided with an annular falling-off groove 714 matched with the falling-off ball 724 in the circumferential direction, the falling-off groove 714 is communicated with the fixing groove 715, the falling-off ball 724 penetrates through the fixing groove 715 and is partially penetrated into the falling-off groove 714, the falling-off bolt 725 penetrates into the fixing groove 715 and is used for fixing the part of the falling-off ball 724 protruding out of the fixing groove 715 in the falling-off groove 714, when the locking member 72 rotates, the falling-off ball 724 rolls in the fixing groove 715, and the falling-off of the locking member 72 is prevented from falling out of the locking groove 712 along the direction perpendicular to the tangential line of the falling-off groove 714 when the locking member 72 generates a trend.

The first limiting post 73 is matched with the recess 53 to abut against the bottom surface of the recess 53 so as to block the lock shell 71 from rotating, so that the rotating angle of the lock shell 71 is limited in a range that is larger than or equal to a central angle corresponding to one edge surface of the locking portion 41 and smaller than a sum of central angles corresponding to two adjacent edge surfaces of the locking portion 41, in different embodiments, the first limiting post 73 may be composed of different parts, and as an example, the first limiting post 73 includes a pin 731 and an elastic cylindrical pin 732, the pin 731 is connected with the elastic cylindrical pin 732, one end of the pin 731, away from the elastic cylindrical pin 732, abuts against the bottom of the first limiting groove 713, and one end of the elastic cylindrical pin 732, away from the pin 731, is located at the notch of the first limiting groove 713. The pin 731 connects the lock case 71 and the fixing sleeve 5, and has the advantages of reliable operation and convenient disassembly. The elastic cylindrical pin 732 has excellent connection performance, good elasticity and shear resistance, and prevents the pin 731 from falling out of the lock case 71.

With continued reference to fig. 1 and 3, as a complement, due to the rotational connection in the above-mentioned locking structure 7, when the valve stem 3 is lifted, the medium will flow partly through the slit separating the valve flap 2 from the valve body 1 into the above-mentioned second limiting chamber 521 and nut cavity 51, and possibly even out of the separating valve through the lifting through hole 711, so that the application provides in particular but not exclusively a solution: the isolation valve with the locking structure further comprises a sealing assembly 8, the sealing assembly 8 is fixedly connected with the fixed sleeve 5, the fixed sleeve 5 is matched with the valve rod 3 and is in sliding connection with the valve rod 3 along the axis direction of the valve rod 3, the fixed sleeve 5 is formed with a packing cavity 54 around the valve rod 3, sealing packing is filled in the packing cavity 54, and the sealing assembly 8 compresses the sealing packing into the packing cavity 54.

Referring to fig. 1 and 6, in addition, in order to facilitate opening of the main valve by using a pilot valve, the present application provides a solution, particularly but not exclusively, that the above-mentioned isolating valve further includes an air source communication portion 9, the air source communication portion 9 is formed on the valve body 1 and integrally connected with the valve body 1, and a medium passage 13 extends into the air source communication portion 9. The air source communicating part 9 is provided with an air source through hole 91, the air source through hole 91 communicates the medium channel 13 with the outside, the air source communicating part 9 is provided with an air source plug 92 at the air source through hole 91, the air source plug 92 is matched with the air source through hole 91 and is used for blocking the air source through hole 91, the air source plug 92 is internally provided with an air source channel 9215 from the outer surface, the air source channel 9215 can be externally connected with air source pressure, and the air source pressure is used for controlling the on-off of the air source channel 9215.

When a user needs to be introduced with an external air source to open the pilot valve, the user can communicate the medium channel 13 with the outside in a mode of externally connecting air source pressure, so that the medium flow speed in the medium channel 13 is increased, the pressure at one end of the valve clack of the pilot valve is increased to open the pilot valve, and after the pilot valve is opened, the pressure in the medium channel 13 at one end of the valve clack of the main valve along the opening direction is rapidly reduced, and the main valve can be rapidly opened.

In addition, the structure can also allow a user to conveniently acquire various parameters of the flow rate of the medium, the pressure of the medium on the valve body and the medium at any time.

In different embodiments, the air source plug 92 may be composed of different structures, so that a user may communicate the medium channel 13 with the outside to introduce an external air source in different manners, for this purpose, the present application particularly but not limited to providing a solution, the air source plug 92 includes a flange plug 921, a spring seat 922, an air source communication valve flap 923 and a sealing spring 924, the flange plug 921 includes a flange 9211 and a mounting rod 9212 penetrating the medium channel 13, the flange 9211 is integrally disposed with the mounting rod 9212, the flange 9211 abuts against the air source communication portion 9 and covers the air source through hole 91, and the mounting rod 9212 is disposed into the medium channel 13.

The air source communicating portion 9 forms a first annular step 911 on the inner wall of the air source through hole 91 toward the periphery of the medium channel 13, the spring seat 922 is matched with the first annular step 911 and is abutted to the first annular step 911, one end of the mounting rod 9212 away from the flange 9211 is abutted to the spring seat 922, the outer surface of the flange plug 921 is provided with an air source channel 9215 on the axis of the mounting rod 9212 along the axis of the mounting rod 9212 toward the direction close to the spring seat 922, the spring seat 922 is provided with a plurality of base communicating holes 9221, the base communicating holes 9221 are communicated with the medium channel 13 and the air source channel 9215, the inner wall of one end of the mounting rod 9212 close to the spring seat 922 is provided with a second annular step 9214 toward the periphery, the air source communicating valve clacks 923 are abutted to the second annular step 9214, two ends of the sealing spring 924 are fixedly connected to the spring seat 922 and the air source communicating valve clacks 923 respectively, and the positions of the air source communicating valve clacks 923 are provided with a plurality of valve clacks (not shown in the figure) abutted to the valve clacks on the second annular step 9214 are used for communicating the valve clacks on two sides of the axis direction of the mounting rod 9212.

Because the air source communication valve clack 923 is abutted on the second annular step 9214, the valve clack communication hole on the air source communication valve clack 923 is sealed by the second annular step 9214, so that the medium can not be released to the external space through the air source channel 9215. When in use, a user can push the air source communication valve clack 923 towards the inside of the medium channel 13 from the outside, at the moment, the sealing spring 924 compresses, and the air source communication valve clack 923 is separated from the second annular step 9214, so that the valve clack communication hole can communicate the air source channel 9215 with the outside space, and the user can introduce an external air source from the air source channel as a pressure source for increasing the pressure in the pilot valve, thereby opening the pilot valve, reducing the pressure at one end of the main valve clack along the opening direction, and rapidly opening the main valve; after the use, the user only needs to remove the external force for moving the sealing spring 924, so that the sealing spring 924 returns to the initial state to re-abut the air source communication valve clack 923 on the second annular step 9214.

Referring to fig. 1 and 6, another solution is provided for the shape and position relationship between the air source communication valve clack 923 and the second annular step 9214, specifically: the air source communicating valve clack 923 is trapezoid circular bench shape, the circular bench side surface of the air source communicating valve clack 923 is abutted to the second circular bench shape 9214 and keeps a sealing state, when the air source communicating valve clack 923 is pushed towards the inside of the medium channel 13 from the outside, when the air source communicating valve clack 923 is used, the sealing spring 924 is compressed, the air source communicating valve clack 923 is separated from the second circular bench shape 9214, the sealing state is broken, an external air source can enter the air source channel through the peripheral side surface of the circular bench shape part of the air source communicating valve clack, and the medium in the air source channel can flow to the external space along the peripheral side surface of the circular bench shape part of the air source communicating valve clack to realize the communication between the air source channel 9215 and the external space, when the air source communicating valve clack 9214 is used, the user can be abutted to the second circular bench shape 9214 again and keeps the sealing state only by removing the external force of the sealing spring 924 after the use.

For the above-mentioned scheme, although the air source communicating valve clack 923 and the second annular step 9214 can form a sealed structure, in order to ensure that the sealing state of the air source communicating portion 9 is not broken by mistake under the condition that no external air source is required to be introduced, the present application specifically but not limited to proposes a scheme that: the air source communicating portion 9 further includes an air source plug screw 93, and the air source plug screw 93 penetrates into the air source channel 9215 from the outer surface of the flange 9211 and is used for blocking the air source channel 9215. When in use, a user pulls the screw plug 93 out of the air source channel 9215, and then uses a long rod or other device to push the air source communication valve clack 923 to open the channel of the air source channel 9215 communicated with the outside.

In different embodiments, the air source channel 9215 may have different shapes, for example, the air source channel 9215 may have a cylindrical shape, etc., in addition, in different embodiments, the plug screw 93 may have different shapes, for example, the plug screw 93 may have the same shape as the air source channel 9215, and as another embodiment, an operation position suitable for installing the plug screw 93 may be provided at the opening of the air source channel 9215 on the outer surface of the flange 9211, that is, the air source channel 9215 is provided with a cylindrical shape and provided with an internal thread, and an external thread matched with the internal thread is provided on the plug screw 93, so that the plug screw 93 may be conveniently installed in the installation position, and play a role in protecting the air source channel 9215.

Additionally, in order to enhance the tightness of the contact between the air source plug 92 and the air source communicating portion 9 on the valve body, the present application specifically, but not exclusively, proposes a solution in which a sealing groove 94 is formed on the air source communicating portion 9, the sealing groove 94 is formed on the surface of the air source communicating portion 9 contacting the flange 9211, a sealing ring 9213 matching the sealing groove 94 is formed on the flange 9211, and the sealing ring 9213 is formed on the surface of the flange 9211 contacting the air source communicating portion 9.

In different embodiments, the flange 9211 may be mounted on the air source communication portion 9 in different manners, which may be a closed structure, and may be convenient for the implementation of the operation of introducing the external air source, for example, the flange 9211 may be connected to the air source communication portion 9 by means of bolts.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. An isolation valve capable of providing external pressure is characterized by comprising a valve body (1), an isolation valve clack (2), a valve rod (3) and an air source communication part (9), wherein a feed inlet (11) and a discharge outlet (12) are formed on the valve body (1), the feed inlet (11) and the discharge outlet (12) are communicated and a medium channel (13) is formed in the valve body (1), the isolation valve clack (2) is positioned in the medium channel (13) and is used for isolating the medium channel (13), one end of the valve rod (3) is connected with the isolation valve clack (2) and is used for opening and closing the isolation valve, the air source communication part (9) is formed on the valve body (1) and is integrally connected with the valve body (1), the medium channel (13) extends into the air source communication part (9), an air source through hole (91) is formed in the air source communication part (9), the medium channel (13) is communicated with the outside, the air source through hole (91) is arranged in the air source communication part (92) and is matched with the air source through hole (92) and is arranged on the air source (92) and is plugged into the air source through hole (92), the air source channel (9215) can be externally connected with air source pressure, and the air source pressure is used for controlling the on-off of the air source channel (9215).

2. The isolation valve capable of providing external pressure according to claim 1, wherein the air source plug (92) comprises a flange plug (921), a spring seat (922), an air source communication valve clack (923) and a sealing spring (924), the flange plug (921) comprises a flange plate (9211) and a mounting rod (9212), the flange plate (9211) and the mounting rod (9212) are integrally arranged, the flange plate (9211) is abutted to the air source communication part (9) and covered on the air source through hole (91), the mounting rod (9212) is arranged in the medium channel (13), the spring seat (922) is fixedly arranged in the medium channel (13), one end of the mounting rod (9212) away from the flange plate (9211) is abutted to the spring seat (922), the outer surface of the flange plug (921) is arranged on the axis of the mounting rod (9212) in a direction close to the mounting rod (9212), the air source communication hole (9215) is arranged on the air source communication hole (9215), the air source (9215) is communicated with the valve seat (9215) by a plurality of communication holes (9215), both ends of the sealing spring (924) are respectively fixedly connected to the spring seat (922) and the air source communication valve clack (923).

3. The isolating valve capable of providing external pressure according to claim 2, wherein a first annular step (911) is formed on the inner wall of the air source through hole (91) formed by the air source communicating part (9) towards the periphery of the medium channel (13), a spring seat (922) is matched with the first annular step (911) and is abutted to the first annular step (911), and one end of the mounting rod (9212) away from the flange plate (9211) is abutted to the spring seat (922) and presses the spring seat (922) on the first annular step (911).

4. The isolation valve capable of providing external pressure according to claim 2, wherein a second annular step (9214) is formed on the inner wall of the mounting rod (9212) near one end of the spring seat (922) towards the periphery, the air source communication valve clack (923) is abutted to the second annular step (9214), and the spring is connected to the air source communication valve clack (923) and used for pressing the air source communication valve clack (923) to the second annular step (9214).

5. The isolation valve capable of providing external pressure according to claim 4, wherein a plurality of valve flap communication holes are formed in the position of the gas source communication valve flap (923) abutting against the second annular step (9214), and the plurality of valve flap communication holes are used for communicating two sides of the gas source communication valve flap (923) in the axial direction of the mounting rod (9212).

6. The isolation valve capable of providing external pressure according to claim 4, wherein one end of the air source communication valve clack (923) close to the flange plate (9211) is in a frustum shape, a side surface of the frustum-shaped portion of the air source communication valve clack (923) is abutted to the edge of the second annular step (9214) to be used for isolating the air source channel (9215), and a gap for medium circulation is formed between the side surface of the air source communication valve clack (923) close to one end of the spring seat (922) and the inner wall of the mounting rod (9212) to be used for forming the air source channel (9215).

7. The isolation valve capable of providing external pressure according to claim 2, wherein the air supply communication part (9) further comprises an air supply plug screw (93), the air supply plug screw (93) being provided by an outer surface of the flange plate (9211) penetrating the air supply channel (9215) and for blocking the air supply channel (9215).

8. The isolation valve capable of providing external pressure according to claim 2, wherein a seal groove is formed on the air source communicating portion (9), the seal groove is formed on a surface of the air source communicating portion (9) in contact with the flange plate (9211), a seal ring (9213) matching the seal groove is formed on the flange plate (9211), and the seal ring (9213) is formed on a surface of the flange plate (9211) in contact with the air source communicating portion (9).