CN114962676A - Balanced axial-flow type stop valve - Google Patents

Abstract

The application discloses a balanced axial-flow type stop valve, it includes well valve body and can dismantle the side valve body that sets up in well valve body both sides, one side threaded connection of well valve body has the closing cap, be formed with the air chamber between closing cap and the well valve body, be provided with the piston in the air chamber, well valve body is located one side that the closing cap was kept away from to the piston and is provided with the push rod, the one end and the piston of push rod can be dismantled and be connected, just the other end of push rod can be dismantled and is provided with the case, threaded connection has the valve seat circle in the side valve body that well valve body kept away from closing cap one side, well valve body is located the both sides of piston in the air chamber and has run through respectively and has seted up first gas port and second gas port, this application is through designing this stop valve for open, can be as required external choke valve adjusting valve open speed, is favorable to making this stop valve can use in the heavy-calibre pipeline, has loading and unloading simply, the flow resistance of the medium is small.

Description

Balanced axial-flow type stop valve

Technical Field

The application relates to the technical field of valves, in particular to a balanced axial-flow type stop valve.

Background

The stop valve is a forced sealing type valve, pressure must be applied to the valve clack when the valve is closed so as to force the sealing surface not to leak, the friction force of the sealing surface is small in the opening and closing process of the valve, the stop valve is durable, the opening height is small, the stop valve is simple to manufacture, convenient to maintain and suitable for various working conditions.

In the related technology, the medium pressure of the stop valve is completely acted on the valve clack, the unbalanced force in the opening and closing process of the valve is large, and the torque or thrust required during opening and closing is also large, so the stop valve is generally suitable for pipelines with medium and small calibers, and the opening and closing of the valve are difficult to realize due to the medium pressure relationship for pipelines with large calibers; the existing stop valve has the disadvantages that because of an internal S-shaped flow channel, the flow channel is complex, the loss of fluid kinetic energy is high, the flow resistance of the valve is high, the stress of the inner cavity of the valve is uneven, the valve core is easy to vibrate and generate noise, and the valve is more prominent in a large-diameter pipeline valve and has a part to be improved.

Disclosure of Invention

In order to enable the stop valve to be applicable to large-caliber and large-caliber pipelines, the application provides a balanced axial flow stop valve.

The application provides a balanced axial-flow type stop valve adopts following technical scheme:

the utility model provides a balanced axial-flow type stop valve, includes well valve body and can dismantle the side valve body that sets up in well valve body both sides, one side threaded connection of well valve body has the closing cap, be formed with the air chamber between closing cap and the well valve body, be provided with the piston in the air chamber, well valve body is located one side that the closing cap was kept away from to the piston and is provided with the push rod, the one end and the piston of push rod can be dismantled and be connected, just the other end of push rod can be dismantled and be provided with the case, the threaded connection has the disk seat circle in the side valve body that well valve body kept away from closing cap one side, well valve body is located the both sides of piston in the air chamber and runs through respectively and has seted up first gas port and second gas port.

Through adopting above-mentioned technical scheme, the air chamber, the setting of first gas port and second gas port can be through admitting air and giving vent to anger and realize the piston in the slippage of air chamber, the piston can drive the case at valve seat circle and well reciprocating motion between the valve body, and realize the sealed of this stop valve through the butt of case and valve seat circle, admit air and give vent to anger through first gas port and second gas port are alternative, design this stop valve for open, can be as required external choke valve adjusting valve open-close's speed, be favorable to making this stop valve can use in the heavy-calibre pipeline.

Preferably, mounting grooves are formed in both ends of the push rod, a clamping groove is formed in one side, close to the end portion of the push rod, of each mounting groove, the piston and the valve core are inserted into the corresponding mounting grooves in a splicing mode, locking rings are arranged on the push rod corresponding to the clamping grooves and formed by splicing two semicircular circular rings, any locking ring is embedded into the clamping groove, and the locking rings are matched with the corresponding piston or the corresponding valve core in a butting mode through clamping springs.

Through adopting above-mentioned technical scheme, the setting of joint groove, mounting groove and locking ring has specifically realized the detachable connected mode of case and piston on the push rod, directly takes off the locking ring can realize dismantling when needs are maintained or are changed simultaneously for the installation effectiveness and the maintenance efficiency of this stop valve.

Preferably, a first sealing groove is formed in the outer side of the piston, a second sealing groove and a third sealing groove are formed in the valve core, and a first sealing ring is embedded in each of the first sealing groove, the second sealing groove and the third sealing groove.

Through adopting above-mentioned technical scheme, setting up of first sealing washer can be sealed between piston and the well valve body inner wall, between disk seat and the well valve body inside respectively, is favorable to improving the leakproofness of this stop valve, prevents that the medium from revealing along the gap that slides the production.

Preferably, one side of the valve core, which is far away from the push rod, forms butt fit with the valve seat ring, a fourth sealing groove is formed in one side of the valve seat ring, which is close to the valve core, and a second sealing ring is embedded in the fourth sealing groove.

Through adopting above-mentioned technical scheme, the setting of second sealing washer can seal the contact department of valve seat circle and case, prevents when the valve is closed, thereby because the too big emergence of the liquid medium pressure in the pipeline reveals and leads to the circumstances of valve leakproofness decline to take place.

Preferably, the junction of side valve body and well valve body, the threaded connection department of closing cap and well valve body and the threaded connection department of valve seat circle and side valve body all are provided with the third sealing washer.

Through adopting above-mentioned technical scheme, the setting of third sealing washer can be sealed the junction that parts such as well valve body, side valve body, valve seat circle and closing cap that form to dismantle the setting at its correspondence, is favorable to further improving the leakproofness of valve, prevents that the medium from revealing.

Preferably, a plurality of balancing holes for balancing left and right pressures of the valve core are arranged on the valve core in an array mode.

Through adopting above-mentioned technical scheme, the setting of balancing hole can be when the valve is opened and close through the convection current of its left and right sides of this hole balance to reach pressure balance's effect, reduced the active area of fluid to the case, required thrust when having reduced the valve and opening and close.

Preferably, a plurality of flow holes for medium flow are formed in the middle valve body along the longitudinal direction of the axes of the two side valve bodies.

Through adopting above-mentioned technical scheme, the opening can supply the medium to flow through, and because the trompil setting, for being arranged in separating the outside and inside strengthening rib of well valve body between hole and the hole, the intensity of valve body in can making obtains guaranteeing, prevent that the inside long-term medium that receives erodees or corrodes and lead to the inside condition of damage of well valve body to take place, and simultaneously, the setting of cooperation closing cap can let the fluid form concentric with the STREAM when passing through, make the fluid horizontal flow, the runner is simple, there is not the flow dead zone, thereby the flow resistance in the valve has further been reduced.

Preferably, a spring is arranged in the air chamber, one end of the spring is embedded in the sealing cover, and the other end of the spring is in butt fit with one side, close to the sealing cover, of the piston.

By adopting the technical scheme, the valve can be in an open or closed state when the air supply of the air source fails according to the requirements of on-site safety production by arranging the spring, so that the function of air-out opening or air-out closing of the valve is realized.

Preferably, the first air port is plugged through a screw plug, a backflow inlet penetrates through the middle valve body, and the axis direction of the backflow inlet is parallel to the length direction of the push rod.

Through adopting above-mentioned technical scheme, can be with the repacking of this stop valve simple processing back stop valve, the repacking is fast, can need but when not having the check valve at the job site, repacking fast and put into use this valve, improved the multiplex condition suitability of this valve.

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

1. the piston in the air chamber can realize the movement of the piston in the air chamber by alternately air inlet and air outlet of a first air port and a second air port which are arranged in the air chamber in a penetrating way, so that the push rod is driven to move the valve core to achieve the effect of opening and closing the valve, and meanwhile, the valve is set to be open and can adjust the speed of opening and closing the valve by controlling the speed of air inlet and air outlet;

2. by means of the arrangement of the first sealing ring, the second sealing ring and the third sealing ring, the sealing performance between parts in the middle valve body and parts in the side valve body is improved, and therefore the medium leakage caused by poor sealing performance inside the middle valve body and the side valve body is further prevented;

3. through the arrangement of the balance hole and the circulation hole, when the valve core can be balanced to move between the middle valve body and the side valve body, the convection currents on the left side and the right side of the valve core can play a role in balancing the pressure on the two sides of the valve core, so that the thrust required when the valve is opened and closed is reduced, a medium can normally penetrate through the valve core, and the strength of the middle valve body is ensured.

Drawings

Fig. 1 is an axial view mainly showing an overall structure of a balanced axial flow type stop valve in the first embodiment of the present application;

fig. 2 is a schematic cross-sectional view of an internal structure of a balanced axial flow type stop valve according to an embodiment of the present application;

fig. 3 is a schematic view of a valve body structure mainly embodied in the first embodiment of the present application;

FIG. 4 is an enlarged view of a portion A in FIG. 2, which mainly shows the structure of the connection between the piston and the push rod;

FIG. 5 is a partial enlarged view of the portion B in FIG. 2, which mainly shows the structure of the sealing portion of the valve core and the valve seat;

fig. 6 is a schematic cross-sectional view of an internal structure of a balanced axial-flow type stop valve according to a second embodiment of the present application;

fig. 7 is a schematic cross-sectional view of an internal structure of a balanced axial flow type stop valve according to a third embodiment of the present application;

fig. 8 is a schematic cross-sectional view of an internal structure of a check valve after a balance axial flow type stop valve is modified according to a fourth embodiment of the present application.

Reference numerals: 1. a middle valve body; 11. sealing the cover; 12. a gas chamber; 13. a piston; 131. a first seal groove; 14. a push rod; 141. mounting grooves; 142. a clamping groove; 143. locking a ring; 15. a valve core; 151. a second seal groove; 152. a third seal groove; 153. a balance hole; 16. a first gas port; 17. a second gas port; 18. a valve seat ring; 181. a fourth seal groove; 19. a flow-through hole; 2. a side valve body; 3. a first seal ring; 4. a second seal ring; 5. a spring; 6. and (4) a reflux inlet.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses balanced axial-flow type stop valve.

Referring to fig. 1 and 2, a balanced axial-flow type stop valve comprises a middle valve body 1 and side valve bodies 2 arranged at two sides of the middle valve body 1, wherein any one of the side valve bodies 2 is detachably connected with the middle valve body 1 through a bolt and a nut, a sealing cover 11 is in threaded connection with one side inside the middle valve body 1, an air chamber 12 is formed between the sealing cover 11 and the middle valve body 1, a piston 13 is arranged in the air chamber 12 in a sliding manner, a push rod 14 is arranged at one side, away from the sealing cover 11, of the piston 13 of the middle valve body 1 in a sliding manner, a valve core 15 is arranged at one side, away from the sealing cover 11, of the push rod 14, mounting grooves 141 are formed at two ends of the push rod 14, a clamping groove 142 is further formed at one side of any one of the mounting grooves 141, the piston 13 and the valve core 15 are arranged in the corresponding mounting grooves 141 in an inserting manner, a locking ring 143 is arranged at a position, corresponding to the clamping groove 142, the locking ring 143 is similar to a clamping spring, and can be arranged in the clamping groove 142 and can clamp and lock the corresponding piston 13 and valve core 15, meanwhile, in the embodiment, the middle valve body 1 is positioned at two sides of the piston 13 in the air chamber 12 and is respectively provided with a first air port 16 and a second air port 17 in a penetrating manner, one end of each of the first air port 16 and the second air port 17 is arranged on the middle valve body 1, the air outlet ends of the first air port 16 and the second air port 17 are respectively arranged at two sides of the piston 13 in the air chamber 12, and the piston 13 can slide in the air chamber 12 by alternately supplying air and discharging air through the first air port 16 and the second air port 17;

meanwhile, a valve seat ring 18 is connected to the side of the valve body 2, which is far away from the sealing cover 11, of the middle valve body 1 in a threaded manner, the piston 13 can drive the valve seat ring 18 to reciprocate between the valve seat ring 18 and the middle valve body 1 through sliding in the air chamber 12 and a push rod 14 arranged on the piston 13, and finally, the sealing of the stop valve is realized through the abutting of the valve core 15 and the valve seat ring 18.

Referring to fig. 4 and 5, a first sealing groove 131 is formed in the outer side of the piston 13, a second sealing groove 151 and a third sealing groove 152 are formed in the valve core 15, in this embodiment, the first sealing groove 131, the second sealing groove 151 and the third sealing groove 152 are all provided with a first sealing ring 3 in an embedded manner, a fourth sealing groove 181 is formed in one side, close to the valve core 15, of the valve seat ring 18, a second sealing ring 4 is arranged in the fourth sealing groove 181 in an embedded manner, meanwhile, the joints of the middle valve body 1 and the two side valve bodies 2, the threaded joints of the sealing cover 11 and the middle valve body 1, and the threaded joints of the valve seat ring 18 and the side valve body 2 are all provided with a third sealing ring, and the arrangement of the first sealing ring 3, the second sealing ring 4 and the third sealing ring is beneficial to improving the sealing performance of the valve in the closed state, so as to prevent the medium from leaking from the connecting gaps.

Referring to fig. 2 and 3, a plurality of balance holes 153 for balancing the pressure inside the middle valve body 1 are arranged in an array on the valve core 15, in this embodiment, four balance holes 153 are provided, and the axis of any balance hole 153 is parallel to the length direction of the push rod 14, referring to fig. 4, a plurality of circulation holes 19 for communicating the two side valve bodies 2 are further formed inside the middle valve body 1 along the length direction of the push rod 14, the arrangement of the balance holes 153 can play a role in balancing the pressure, which is beneficial to reducing the thrust required when the valve is opened and closed, and meanwhile, a reinforcing rib can be formed between two adjacent circulation holes 19 by the arrangement of the circulation holes 19, on one hand, the strength of the middle valve body 1 is improved, on the other hand, the middle valve body 1 can be prevented from being damaged due to long-term medium corrosion, and the service life of the valve is prolonged.

The implementation principle of this application embodiment a balanced axial-flow type stop valve does: when the valve needs to be closed, inflate in the first air port 16, and discharge the air of air chamber 12 opposite side through second gas port 17, the gas of first air port 16 one side can drive piston 13 push rod 14 and case 15 to the one side of valve seat circle 18 and slide and until with valve seat circle 18 butt, the sealing of valve can be realized to second sealing washer 4 this moment, the flow of barrier medium, simultaneously, because this valve adopts open design, can be as required external throttle valve adjustment valve's switching speed, because two side valve bodies 2 are the same in structure, can temporarily change opposite side valve body 2 when the valve body of one side damages, make things convenient for the valve to maintain.

Example 2

Referring to fig. 6, the present embodiment is different from embodiment 1 in that: one side that closing cap 11 is close to piston 13 is provided with spring 5, spring 5's one end and closing cap 11 form to inlay and establish the cooperation, spring 5's the other end and piston 13 form the butt cooperation near one side of closing cap 11, spring 5's setting can play safety protection's effect, prevent because the corrosion, the gas port shutoff or other reasons make piston 13 be difficult to the condition emergence of freely sliding in air chamber 12, be favorable to prolonging the life of this valve, and simultaneously, spring 5's setting is according to the needs of on-the-spot safety in production, make the valve be in the state of closing when air supply air feed trouble.

Example 3

Referring to fig. 7, the present embodiment is different from embodiment 2 in that: spring 5 sets up the one side of keeping away from closing cap 11 at piston 13, and spring 5's axial both ends form the butt cooperation with piston 13 and well 1 inner wall of valve body respectively, the effect that can play safety protection equally, prevent because the inside corrosion of valve body, the gas port shutoff or other reasons make piston 13 be difficult to the condition emergence of freely sliding in air chamber 12, the life of valve has been prolonged, and simultaneously, spring 5's setting can be according to the needs of on-the-spot safety in production, make the valve be in the state of opening when air supply air feed trouble.

Example 4

Referring to fig. 8, the present embodiment is different from embodiment 1 in that: first gas port 16 does the shutoff and handles to run through on well valve body 1 and set up backward flow import 6, through above processing, can be with the repacking check valve after this stop valve simple processing, the repacking is fast, can need but not have the check valve at the job site, repacking fast and come into operation to this valve, has improved the multiplex condition suitability of this valve.

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

Claims (9)

1. A balanced axial flow shut-off valve characterized by: comprises a middle valve body (1) and side valve bodies (2) which are detachably arranged at two sides of the middle valve body (1), one side of the middle valve body (1) is in threaded connection with a sealing cover (11), an air chamber (12) is formed between the sealing cover (11) and the middle valve body (1), a piston (13) is arranged in the air chamber (12), a push rod (14) is arranged on one side, away from the sealing cover (11), of the piston (13) of the middle valve body (1), one end of the push rod (14) is detachably connected with the piston (13), a valve core (15) is detachably arranged at the other end of the push rod (14), a valve seat ring (18) is connected with the internal thread of the side valve body (2) at one side of the middle valve body (1) far away from the sealing cover (11), the middle valve body (1) is positioned on two sides of a piston (13) in the air chamber (12) and is respectively provided with a first air port (16) and a second air port (17) in a penetrating way.

2. A balanced axial flow shut-off valve according to claim 1 wherein: mounting grooves (141) are formed in two ends of the push rod (14), a clamping groove (142) is further formed in one side, close to the end portion of the push rod (14), of each mounting groove (141), the piston (13) and the valve core (15) are arranged in the corresponding mounting grooves (141) in an inserted mode, a locking ring (143) is arranged on the push rod (14) in a position corresponding to the clamping groove (142), the locking ring (143) is formed by splicing two semicircular rings, any locking ring (143) is arranged in the clamping groove (142) in an embedded mode, and any locking ring (143) is matched with the corresponding piston (13) or valve core (15) in an abutted mode through the clamping springs.

3. A balanced axial flow shut-off valve according to claim 2 wherein: first seal groove (131) have been seted up in piston (13) outside, second seal groove (151) and third seal groove (152) have been seted up on case (15), all inlay in first seal groove (131), second seal groove (151) and third seal groove (152) and establish and be provided with first sealing washer (3).

4. A balanced axial flow shut-off valve according to claim 3 wherein: one side that push rod (14) were kept away from in case (15) forms the butt cooperation with valve seat circle (18), just fourth seal groove (181) have been seted up to one side that valve seat circle (18) are close to case (15), fourth seal groove (181) are embedded to be equipped with second sealing washer (4).

5. A balanced axial flow shut-off valve according to claim 4 wherein: the junction of side valve body (2) and well valve body (1), the threaded connection department of closing cap (11) and well valve body (1) and the threaded connection department of valve seat circle (18) and side valve body (2) all are provided with the third sealing washer.

6. A balanced axial flow stop valve according to claim 1 characterised by: the valve core (15) is provided with a plurality of balancing holes (153) for balancing the left pressure and the right pressure of the valve core (15) in an array manner.

7. A balanced axial flow shut-off valve according to claim 1 wherein: a plurality of circulation holes (19) for medium circulation are formed in the middle valve body (1) along the axial lines of the two side valve bodies (2) in the length direction.

8. A balanced axial flow shut-off valve according to claim 1 wherein: the air chamber (12) is internally provided with a spring (5), one end of the spring (5) is embedded in the sealing cover (11), and the other end of the spring (5) and one side of the piston (13) close to the sealing cover (11) form butt joint matching.

9. A balanced axial flow shut-off valve according to claim 1 wherein: the first air port (16) is plugged through a plug, a backflow inlet (6) penetrates through the middle valve body (1), and the axial direction of the backflow inlet (6) is parallel to the length direction of the push rod (14).

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