CN214500107U - Pneumatic layer cooling valve - Google Patents

Abstract

The utility model relates to the technical field of metal valves, in particular to a pneumatic laminar cooling valve, which comprises a valve body, a cylinder component, a manual adjusting component and a valve cover; the air cylinder assembly and the valve body are respectively and fixedly connected to the upper end and the lower end of the valve cover through studs; the manual adjusting assembly is connected above the air cylinder assembly; a sleeve is fixed in a closed valve cavity formed by the valve body and the valve cover, and a valve core connected with the cylinder assembly is arranged in the sleeve; the inner wall of the sleeve is provided with two annular bosses, and the valve core is arranged between the two annular bosses in the sleeve in a sliding manner. The utility model discloses a set up two cyclic annular bosss at sleeve inner wall for the sliding seal that can form between case and the sleeve is vice, and the valve port extrudees aquatic granule impurity and causes the problem of leaking when effectively avoiding the valve to close, and simultaneously, sliding seal is vice slides the scratch that can very big reduction seal wear and tear and granule impurity on smooth face of cylinder, can effectively improve the sealing performance and the life of valve.

Description

Pneumatic layer cooling valve

Technical Field

The utility model relates to a metal valve technical field specifically is a steel rolling laminar flow cooling water system's pneumatic layer cold valve.

Background

The pneumatic laminar cooling valve is a switch functional valve, and is mainly used for automatically controlling the quick on-off or flow direction of water flow in a pipeline in a turbid circulating water system. The switch function valve majority of present turbid circulating water system automatic control rivers is butterfly valve or ball valve etc. and butterfly valve, ball valve have better through-flow performance, characteristics such as compact structure is simple, nevertheless under the relatively poor and higher operating mode condition of working frequency of turbid circulating water system quality of water, the anti granule impurity performance of these valves is relatively poor, and life is shorter, and the valve port leakage problem is comparatively outstanding in the short time, very big influence production rhythm and product quality.

Disclosure of Invention

An object of the utility model is to provide a pneumatic layer cold valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a pneumatic laminar cooling valve comprises a valve body, a cylinder assembly, a manual adjusting assembly and a valve cover; the air cylinder assembly and the valve body are respectively and fixedly connected to the upper end and the lower end of the valve cover through studs; the manual adjusting assembly is connected above the air cylinder assembly; a sleeve is fixed in a closed valve cavity formed by the valve body and the valve cover, a valve core connected with the air cylinder assembly is arranged in the sleeve, and the valve core divides an inner cavity of the valve body into a water inlet cavity and a water outlet cavity;

the inner wall of the sleeve is provided with two annular bosses, and the valve core is arranged between the two annular bosses in the sleeve in a sliding manner; the side wall of the valve core is at least provided with two strip-shaped holes which are staggered in length and symmetrically distributed; a groove is formed in the center of the upper end of the valve core, a valve rod is connected in the groove, and the top end of the valve rod is connected with a cylinder assembly;

the cylinder assembly comprises a cylinder cover, a cylinder barrel, a piston and a cylinder head; the cylinder cover and the cylinder head are respectively connected to the upper end and the lower end of the cylinder barrel and are in sealing connection with the cylinder barrel; a guide rod penetrates through the center of the cylinder cover; the piston is arranged in the cylinder barrel and divides the cylinder barrel into an upper cavity and a lower cavity; the top end of the valve rod sequentially penetrates through the cylinder head and the piston and is connected with the guide rod through a locking nut; the cylinder cover is provided with an upper air port, the cylinder head is provided with a lower air port, and the upper cavity and the lower cavity of the cylinder barrel are respectively communicated with an external air path through the upper air port and the lower air port; the bottom end of the cylinder head is provided with a water drainage cavity, the cylinder head is provided with a water drainage opening, and the water drainage opening is communicated with the water drainage cavity.

Furthermore, the main body of the valve body is of a spherical structure, an upper baffle and a lower baffle are arranged in the inner cavity of the valve body, and a round hole is formed between the upper baffle and the lower baffle.

Furthermore, the valve core is of a cylindrical structure with an outer cylindrical guide surface, and the outer cylindrical guide surface of the valve core is matched with the two annular bosses of the sleeve to form a sliding guide support structure; be equipped with the hole of permeating water between two telescopic cyclic annular bosss, all be equipped with the seal groove of indent on two telescopic cyclic annular boss lateral walls, be equipped with the sealing washer in the seal groove, the outer cylinder spigot surface of sealing washer inner circle and case closely laminates.

Furthermore, a water through hole and a threaded hole are formed in the upper part of the valve core; and a gland is sleeved on the outer side of the valve rod at the upper end of the valve core and is fixedly connected with a threaded hole in the valve core through a screw.

Furthermore, the valve rod is of a stepped structure, the upper end of the valve rod is smaller, the lower end of the valve rod is larger, and threads matched with the locking nut are arranged at the upper end of the valve rod;

furthermore, the locking nut is of a circular truncated cone structure with a small upper part and a large lower part, a concave groove of an inverted T-shaped structure is formed in the upper end of the locking nut, and the concave part extends from the center of the locking nut to the edge and is used for installing the guide rod.

Furthermore, one ends of the cylinder cover and the cylinder head, which are close to the cylinder barrel, are arranged in a circular truncated cone shape, a sealing groove is arranged in the center of the outer side of the circular truncated cone, and an O-shaped ring is sleeved in the sealing groove and used for tightly connecting the circular surface of the outer side of the circular truncated cone and the inner wall of the cylinder barrel; the centers of the cylinder cover and the cylinder head are sleeved with a sealing ring and a guide belt which are used for sealing and guiding the guide rod and the valve rod; the outer side of the guide rod at the top end of the cylinder cover is sleeved with a sealing cover, and the sealing cover is fixedly connected with the cylinder cover through a screw; the outer side of the valve rod at the bottom end of the cylinder head is sleeved with a guide sleeve, and the guide sleeve is fixedly connected with the cylinder head through a screw;

furthermore, a spacer bush is arranged in the water drainage cavity, and water drainage holes are formed in two sides of the spacer bush.

Further, the manual adjusting assembly comprises a hand wheel, a screw rod and a support; the support is connected with a cylinder cover of the cylinder assembly through a stud; the screw rod is vertically arranged inside the support, and the top end of the screw rod penetrates through the top end support and extends to the position above the support; a detection nut connected with the guide rod is arranged below the screw rod, and the upper end surface of the detection nut is abutted against the bottom end of the screw rod; the hand wheel is fixedly connected with the top end of the screw rod through the locking piece.

Furthermore, the support of the manual adjusting assembly is also provided with a proximity switch; the detection nut is in threaded connection with the upper end of the guide rod, moves up and down along with the moving part where the guide rod is located, and is matched with the proximity switch to form a sensor assembly for detecting the state of the valve position.

Compared with the prior art, the beneficial effects of the utility model are that:

1) according to the pneumatic laminar cooling valve, the two annular bosses are arranged on the inner wall of the sleeve, so that a sliding sealing pair can be formed between the valve core and the sleeve, the problem that particle impurities in water are extruded to cause leakage and the problem that the sealing pair is extruded to be damaged when the valve is closed are effectively avoided, meanwhile, the sliding sealing pair slides on a smooth cylindrical surface, so that the sealing abrasion and the scratch of the particle impurities can be greatly reduced, the sealing performance of the valve can be effectively improved, and the service life of the valve can be effectively prolonged;

2) this pneumatic layer cold valve, through the chamber and the outlet of leaking that set up on the cylinder head at the cylinder subassembly for the chamber of leaking can be through the external atmosphere of outlet UNICOM, so that when valve rod department sealing washer takes place the leakage problem, the leakage water can possess a release space and excrete, avoids inside the water splash of leaking gets into the cylinder subassembly, reduces the gas circuit trouble, effectively makes the cylinder subassembly form a simple structure's air water isolation structure, guarantees the stable work of cylinder subassembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged schematic view of the structure of FIG. 1 at B according to the present invention;

fig. 4 is an enlarged schematic structural diagram of the point C in fig. 1 according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a valve body; 11. a water inlet cavity; 12. an upper baffle plate; 13. a water outlet cavity; 14. a lower baffle plate; 2. a valve core; 21. a valve stem; 22. a strip-shaped hole; 3. a sleeve; 31. water permeable holes; 32. an annular boss; 4. a cylinder assembly; 41. a cylinder cover; 411. an upper air port; 42. a guide bar; 43. locking the nut; 44. a cylinder barrel; 45. a piston; 46. a cylinder head; 461. a water discharge opening; 462. a lower air port; 47. a spacer sleeve; 471. a water drain hole; 48. a guide sleeve; 49. a water drainage cavity; 5. a proximity switch; 6. a manual adjustment assembly; 61. a cap nut; 62. a hand wheel; 63. a support pad; 64. fixing a nut; 65. a screw; 66. a support; 67. detecting the nut; 7. a valve cover; 8. a gland; 9. and (7) sealing the cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a pneumatic laminar cooling valve comprises a valve body 1, a cylinder assembly 4, a manual adjusting assembly 6 and a valve cover 7; the air cylinder assembly 4 and the valve body 1 are respectively and fixedly connected to the upper end and the lower end of the valve cover 7 through studs; the manual adjusting assembly 6 is connected above the cylinder assembly 4; a sleeve 3 is fixed in a closed valve cavity formed by the valve body 1 and the valve cover 7, a valve core 2 connected with the air cylinder assembly 4 is arranged in the sleeve 3, and the valve core 2 divides an inner cavity of the valve body 1 into a water inlet cavity 11 and a water outlet cavity 13;

in this embodiment, the main body of the valve body 1 is a spherical structure, an upper baffle 12 and a lower baffle 14 are arranged in the inner cavity of the valve body 1, a round hole is formed between the upper baffle 12 and the lower baffle 14, the structural strength of the valve body 1 is enhanced through the upper baffle 12 and the lower baffle 14, the flow resistance is reduced, the flow direction of water flow is guided, the risk of forming a swirling flow body in an annular flow channel outside the valve core 2 is reduced, a large twisting moment of the swirling flow body on the sleeve 3 and the valve core 2 is effectively reduced, the valve core 2 is prevented from rotating, it is ensured that the valve core 2 can block the water flow when the valve body 1 is closed, and the valve port leakage of the valve body 1 is avoided;

two annular bosses 32 are arranged on the inner wall of the sleeve 3, and the valve core 2 is arranged between the two annular bosses 32 in the sleeve 3 in a sliding manner; the side wall of the valve core 2 is at least provided with two strip-shaped holes 22 which are staggered in length and are symmetrically distributed; a groove is formed in the center of the upper end of the valve core 2, a valve rod 21 is connected in the groove, and the top end of the valve rod 21 is connected with the cylinder assembly 4; the strip-shaped holes 22 can stabilize the flow of fluid in the process of opening and closing the valve, and effectively reduce the impact of water flow on the valve and a pipeline;

in this embodiment, the valve core 2 is a cylindrical structure with an outer cylindrical guide surface, and the outer cylindrical guide surface of the valve core 2 is matched with the two annular bosses 32 of the sleeve 3 to form a sliding guide support structure; a water permeable hole 31 is formed between the two annular bosses 32 of the sleeve 3, concave sealing grooves are formed in the side walls of the two annular bosses 32 of the sleeve 3, sealing rings are arranged in the sealing grooves, and the inner rings of the sealing rings are tightly attached to the outer cylindrical guide surface of the valve core 2, so that the valve core 2 can reciprocate up and down along the central axis of the sleeve 3 under the action of the cylinder assembly 4 through the valve rod 21; the sealing ring can enable the two annular bosses 32 of the sleeve 3 to be tightly attached to the outer cylindrical surface of the valve core 2 to form a sliding sealing pair, and compared with a sealing pair structure formed by axial extrusion of a conical surface or a plane on a valve port of a traditional valve, the sliding sealing pair can effectively avoid the problem that particle impurities in water are extruded to cause leakage and the problem of extrusion damage of the sealing pair when the valve is closed;

when the strip-shaped hole 22 on the valve core 2 moves between the two annular bosses 32, the strip-shaped hole 22 is communicated with the water permeable hole 31, so that water in the water inlet cavity 11 can enter the water outlet cavity 13 through the valve core 2, and the valve is in an open state; when the strip-shaped hole 22 on the valve core 2 moves to the position below the two annular bosses 32, the strip-shaped hole 22 is not communicated with the water permeable hole 31, and water in the water inlet cavity 11 is separated by the valve core 2 and cannot enter the water outlet cavity 13, so that the valve is in a closed state;

in the embodiment, the upper part of the valve core 2 is provided with a water through hole and a threaded hole; a gland 8 is sleeved on the outer side of a valve rod 21 at the upper end of the valve core 2, and the gland 8 is fixedly connected with a threaded hole in the valve core 2 through a screw; in this embodiment, the gland 8 is provided with a hole matched with the water through hole and the threaded hole, so that the gland 8 can tightly connect the valve rod 21 with the valve core 2; the inner cavity of the valve core 2 and the cavity at the upper end of the valve core 2 can be communicated through the water through hole, so that the acting force of the valve core 2 on water pressure can achieve self balance, the specification of the cylinder assembly 4 is effectively reduced, and the volume of the device is reduced;

the cylinder assembly 4 comprises a cylinder cover 41, a cylinder barrel 44, a piston 45 and a cylinder head 46; the cylinder cover 41 and the cylinder head 46 are respectively connected to the upper end and the lower end of the cylinder barrel 44 and are hermetically connected with the cylinder barrel 44; a guide rod 42 penetrates through the center of the cylinder cover 41; the piston 45 is arranged in the cylinder 44 and divides the cylinder 44 into an upper cavity and a lower cavity; the top end of the valve rod 21 sequentially penetrates through a cylinder head 46 and a piston 45 and is connected with the guide rod 42 through a locking nut 43; an upper air port 411 is arranged on the cylinder cover 41, a lower air port 462 is arranged on the cylinder head 46, and the upper cavity and the lower cavity of the cylinder barrel 44 are respectively communicated with an external air circuit through the upper air port 411 and the lower air port 462; the bottom end of the cylinder head 46 is provided with a water drainage cavity 49, the cylinder head 46 is provided with a water drainage port 461, the water drainage port 461 is communicated with the water drainage cavity 49, compressed air of an air source is respectively introduced into or discharged out of an upper sealing cavity and a lower sealing cavity which are divided by the air cylinder assembly 4 through the switching operation of an electromagnetic directional valve arranged on an external air path, and the piston 45 is driven to move upwards or downwards in the cylinder barrel 44 by the upward or downward driving force generated by the action of single-side air pressure on the piston 45, so that the valve rod 21, the valve core 2 and the guide rod 42 are driven to move upwards and downwards to realize the opening and closing action of the valve; the water discharge cavity 49 can be communicated with the outside atmosphere through the water discharge opening 461, so that when the sealing ring at the valve rod 21 has a leakage problem, the leakage water can have a release space for discharging, the leakage water is prevented from splashing into the cylinder assembly 4, the gas circuit fault is reduced, the cylinder assembly 4 is effectively enabled to form a gas-water isolation structure with a simple structure, and the stable work of the cylinder assembly 4 is ensured;

in this embodiment, the piston 45 is a driving element arranged in the cylinder assembly 4, the piston 45 is a disc-shaped structure with a through hole in the middle, a sealing ring is arranged on the outer circumferential side surface, and the piston 45 is in sealing fit with the inner wall of the cylinder tube 44 through the sealing ring, so that the piston 45 can fully seal the upper cavity and the lower cavity of the cylinder tube 44;

in this embodiment, the valve rod 21 is of a stepped structure, the upper end of the valve rod 21 is smaller, the lower end of the valve rod 21 is larger, and the upper end of the valve rod 21 is provided with a thread matched with the lock nut 43; in this embodiment, the lower end of the threaded structure of the valve rod 21 is a stepped cylindrical surface, a gasket is sleeved on a small cylindrical surface at the upper end of the valve rod 21, the small cylindrical surface at the upper end of the valve rod 21 is tightly matched with an inner hole of the piston 45, and an O-ring seal is arranged between the small cylindrical surface at the upper end of the valve rod 21 and the inner hole of the piston 45, so that the valve rod 21 penetrates through the piston 45 and can be tightly connected with the locking nut 43, the piston 45 can be tightly assembled on a shoulder (gasket) of the valve rod 21, the sealing performance of the valve rod 21 and the piston 45 is improved, the piston 45 can be driven to stably lift the valve rod 21 when reciprocating up and down in the cylinder 44, and the sealing performance of the piston 45 on the upper cavity and the lower cavity of the cylinder 44 is ensured; in the embodiment, a stepped groove with a large upper part and a small lower part is formed in the center of the upper end part of the valve core 2, a circular truncated cone at the lower end of the valve rod 21 is arranged in the stepped groove, and the valve rod 21 is tightly pressed and fixed on the valve core 2 through the gland 8, so that the valve rod 21 is stably connected with the valve core 2;

in this embodiment, the locking nut 43 is a circular truncated cone structure with a small top and a large bottom, a concave groove with an inverted T-shaped structure is arranged at the upper end of the locking nut 43, and the concave part extends from the center of the locking nut 43 to the edge for installing the guide rod 42; in the embodiment, the outer side surface of the lower end of the circular truncated cone of the locking nut 43 is of a cylindrical structure, the central inner hole is a threaded through hole, and the outer side surface of the upper end of the locking nut is of an equiangular hexagonal structure, so that the wrench can be conveniently clamped in position during fastening; in this embodiment, the guide rod 42 is a rod-shaped structure, the bottom end of the guide rod 42 is provided with a cylindrical head with an inverted T-shaped structure, the outer side of the top end of the guide rod 42 is provided with an external thread, and the guide rod 42 below the external thread is provided with a chamfer convenient for sealing installation and a flat surface convenient for wrench clamping, so that the bottom end of the guide rod 42 can be clamped into the concave groove of the locking nut 43, and the guide rod 42 can synchronously reciprocate up and down along with the locking nut 43, the piston 45 and the valve rod 21;

in this embodiment, the ends of the cylinder head 41 and the cylinder head 46 close to the cylinder tube 44 are circular truncated cones, a sealing groove is arranged in the center of the outer side of each circular truncated cone, and an O-shaped ring is sleeved in the sealing groove and used for tightly connecting the circular surface of the outer side of each circular truncated cone with the inner wall of the cylinder tube 44; the centers of the cylinder cover 41 and the cylinder head 46 are sleeved with sealing rings and guide belts for sealing and guiding the guide rod 42 and the valve rod 21; the outer side of the guide rod 42 at the top end of the cylinder cover 41 is sleeved with a sealing cover 9, and the sealing cover 9 is fixedly connected with the cylinder cover 41 through a screw; the outer side of the valve rod 21 at the bottom end of the cylinder head 46 is sleeved with a guide sleeve 48, and the guide sleeve 48 is fixedly connected with the cylinder head 46 through a screw; in this embodiment, one end of the cylinder cover 41 away from the circular truncated cone is a square plate structure, and one end of the cylinder head 46 away from the circular truncated cone is a circular disc structure; the guide belt arranged at the center of the cylinder cover 41 and the cylinder head 46 is positioned between the piston 45 and the sealing ring;

in this embodiment, the seal rings at the centers of the cylinder cover 41 and the cylinder head 46 adopt a combined seal ring in which an outer ring is an elastic body and an inner ring is a wear-resistant seal ring; when the sealing ring which is hard in material and small in size is adopted, the cylinder cover 41 and the cylinder head 46 are provided with open grooves, the opening of the open groove of the cylinder cover 41 faces upwards, and the opening of the open groove of the cylinder head 46 faces downwards, so that the sealing ring is convenient to mount; when a sealing ring which is made of a softer material and has a larger size is adopted, grooves on the cylinder cover 41 and the cylinder head 46 can be provided with closed sealing grooves on the premise of convenient installation;

in this embodiment, the lower end of the cylinder head 46 is further provided with a small round table, so that the cylinder head 46 can be embedded into an inner hole at the upper end of the valve cover 7 when being installed, and the guide sleeve 48 is extruded, so that both the cylinder head 46 and the guide sleeve 48 can be tightly connected with the valve cover 7; in this embodiment, sealing rings are arranged at the joints of the guide sleeve 48, the valve rod 21 and the valve cover 7, so as to ensure the sealing performance between the guide sleeve 48 and the valve rod 21 and the valve cover 7;

in this embodiment, a spacer 47 is disposed inside the water drainage cavity 49, and water drainage holes 471 are disposed on two sides of the spacer 47; in this embodiment, the spacer 47 may be used as a fixing member to fix the sealing ring at the lower end of the cylinder head 46; if the sealing ring groove at the lower end of the cylinder head 46 adopts a closed sealing groove, a spacer 47 is not required to be assembled in the water drainage cavity 49;

in this embodiment, the manual adjustment assembly 6 includes a hand wheel 62, a screw 65 and a support 66; the support 66 is connected with the cylinder cover 41 of the cylinder assembly 4 through a stud; the screw rod 65 is vertically arranged inside the support 66 and is in threaded connection with a threaded inner hole in the center of the upper end of the support 66, and the top end of the screw rod 65 penetrates through the top end support 66 and extends above the support 66; a detection nut 67 connected with the guide rod 42 is arranged below the screw rod 65, and the upper end surface of the detection nut 67 is abutted against the bottom end of the screw rod 65; the hand wheel 62 is fixedly connected with the top end of the screw rod 65 through a locking piece; in this embodiment, the retaining member includes a cap nut 61, a support washer 63, and a retaining nut 64; the supporting gasket 63 is sleeved on the outer side of the screw rod 65 above the hand wheel 62, and the cap nut 61 is fixed at the top end of the screw rod 65; the fixing nut 64 is sleeved outside the screw rod 65 at the top end of the support 66, so that the manual adjusting assembly 6 can drive the screw rod 65 to lift through the rotation of the hand wheel 62, the detection nut 67, the guide rod 42, the piston 45 and the valve rod 21 are extruded to descend through the descending of the screw rod 65, the strip-shaped hole 22 of the valve core 2 is further moved to the lower part of the two annular bosses 32, the water inlet cavity 11 and the water outlet cavity 13 are sealed through the valve core 2, and the valve can be forcibly closed manually; when manual operation is not needed, and the valve opening and closing action is automatically controlled only through an external air path, the hand wheel 62 is rotated to drive the screw rod 65 to ascend until the bottom of the screw rod 65 is not contacted with the upper end of the detection nut 67 when the valve is in a full-opening limit position, at the moment, the position of the screw rod 65 needs to be fastened and locked through the fixing nut 64, and the detection nut 67 is prevented from impacting the screw rod 65 when the valve is opened;

in this embodiment, the support 66 of the manual adjustment assembly 6 is further provided with a proximity switch 5; the detection nut 67 is in threaded connection with the upper end of the guide rod 42, moves up and down along with the moving part where the guide rod 42 is located, and is matched with the proximity switch 5 to form a sensor assembly for detecting the valve position state; in this embodiment, the support 66 is a cylindrical structure, a threaded hole for installing the proximity switch 5 is formed in the side wall of the support 66, the proximity switch 5 and the detection nut 67 are matched to form a sensor assembly, so that the valve position state can be automatically detected conveniently, and the proximity switch 5 can also adopt other sensor assembly structures such as a travel switch and the like for detecting the valve position state;

in this embodiment, graphite gaskets (not shown) are disposed at the joints of the valve body 1, the sleeve 3 and the valve cover 7; the valve cover 7 is of a disc-shaped structure, a circular truncated cone is arranged at the lower end of the valve cover, and a cylindrical surface on the side surface of the circular truncated cone is in tolerance fit with an inner hole of the valve body 1, so that the requirement on installation coaxiality is met; a smaller step is arranged on the lower end face of the circular truncated cone of the valve cover 7 close to the edge, and the step face is in extrusion fit with the upper end face of the graphite gasket arranged on the upper end face of the sleeve 3 to form a sealing pair; a circle of uniformly distributed mounting holes are formed in the large annular region on the outer side of the circular table of the valve cover 7 and correspond to the screw holes in the upper end face of the valve body 1, so that the valve body 1 and the valve cover 7 can be fastened and connected through a stud to form a closed pressure-bearing shell; the upper end face and the lower end face of the sleeve 3 respectively extrude graphite gaskets which are in sealing fit with the valve cover 7 and the valve body 1 to form a sealing pair structure, and tight connection of the valve body 1, the sleeve 3 and the valve cover 7 is guaranteed.

Principle of operation

When the pneumatic layer cooling valve is used, the upper air port 411 and the lower air port 462 of the air cylinder assembly 4 are communicated with an external air path, compressed air of an air source is respectively introduced into or exhausted out of an upper sealing cavity and a lower sealing cavity which are formed by dividing the air cylinder assembly 4 through switching operation of an electromagnetic directional valve arranged on the external air path, so that single-side air pressure acts on the piston 45 to generate upward or downward pushing force to drive the piston 45 to move upwards or downwards in the air cylinder barrel 44, further drive the valve rod 21, the valve core 2 and the guide rod 42 to move upwards or downwards, enable the strip-shaped hole 22 of the valve core 2 to be communicated or not communicated with the water permeable hole 31, and separate or open the water inlet cavity 11 and the water outlet cavity 13 through the valve core 2 to realize the opening and closing action of the valve; in the opening and closing processes of the valve, the sliding sealing pair formed between the valve core 2 and the sleeve 3 can effectively avoid the problem of leakage caused by particle impurities extruded into water by a valve port when the valve is closed and the problem of extrusion damage of the sealing pair, and meanwhile, the sliding sealing pair slides on a smooth cylindrical surface, so that the sealing abrasion and the scratch of the particle impurities can be greatly reduced, the sealing performance of the valve can be effectively improved, and the service life of the valve can be effectively prolonged; and the water leakage cavity 49 that sets up on the cylinder head 46 of cylinder assembly 4 can be through the external atmosphere of outlet 461 UNICOM to when the sealing washer emergence leakage problem of valve rod 21 department, the leakage water can possess a release space and excrete, avoids inside the water splash of leaking gets into cylinder assembly 4, reduces the gas circuit trouble, effectively makes cylinder assembly 4 form a simple structure's air water isolation structure, guarantees that cylinder assembly 4 stably works.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (10)

1. A pneumatic laminar cooling valve comprises a valve body (1), a cylinder assembly (4), a manual adjusting assembly (6) and a valve cover (7); the air cylinder assembly (4) and the valve body (1) are respectively and fixedly connected to the upper end and the lower end of the valve cover (7) through studs; the manual adjusting assembly (6) is connected above the cylinder assembly (4); a sleeve (3) is fixed in a closed valve cavity formed by the valve body (1) and the valve cover (7), a valve core (2) connected with the air cylinder assembly (4) is arranged in the sleeve (3), and the inner cavity of the valve body (1) is divided into a water inlet cavity (11) and a water outlet cavity (13) by the valve core (2); the method is characterized in that:

two annular bosses (32) are arranged on the inner wall of the sleeve (3), and the valve core (2) is arranged between the two annular bosses (32) in the sleeve (3) in a sliding manner; the side wall of the valve core (2) is at least provided with two strip-shaped holes (22) which are staggered in length and symmetrically distributed; a groove is formed in the center of the upper end of the valve core (2), a valve rod (21) is connected in the groove, and the top end of the valve rod (21) is connected with the air cylinder assembly (4);

the cylinder assembly (4) comprises a cylinder cover (41), a cylinder barrel (44), a piston (45) and a cylinder head (46); the cylinder cover (41) and the cylinder head (46) are respectively connected to the upper end and the lower end of the cylinder barrel (44) and are hermetically connected with the cylinder barrel (44); a guide rod (42) penetrates through the center of the cylinder cover (41); the piston (45) is arranged in the cylinder barrel (44) and divides the cylinder barrel (44) into an upper cavity and a lower cavity; the top end of the valve rod (21) sequentially penetrates through a cylinder head (46) and a piston (45) and is connected with a guide rod (42) through a locking nut (43); an upper air port (411) is formed in the cylinder cover (41), a lower air port (462) is formed in the cylinder head (46), and an upper cavity and a lower cavity of the cylinder barrel (44) are communicated with an external air circuit through the upper air port (411) and the lower air port (462) respectively; the bottom end of the cylinder head (46) is provided with a water drainage cavity (49), the cylinder head (46) is provided with a water drainage opening (461), and the water drainage opening (461) is communicated with the water drainage cavity (49).

2. The pneumatic laminar cooling valve according to claim 1, characterized in that the main body of the valve body (1) is a sphere structure, an upper baffle (12) and a lower baffle (14) are arranged in the inner cavity of the valve body (1), and a circular hole is formed between the upper baffle (12) and the lower baffle (14).

3. A pneumatic laminar cooling valve according to claim 1, characterized in that the valve core (2) is provided as a cylindrical structure with an outer cylindrical guide surface, the outer cylindrical guide surface of the valve core (2) and two annular bosses (32) of the sleeve (3) cooperate to form a sliding guide support structure; be equipped with between two cyclic annular boss (32) of sleeve (3) and permeate water hole (31), all be equipped with the seal groove of indent on two cyclic annular boss (32) lateral walls of sleeve (3), be equipped with the sealing washer in the seal groove, the outer cylinder spigot surface of sealing washer inner circle and case (2) closely laminates.

4. A pneumatic laminar cooling valve according to claim 3, characterized in that the upper part of the valve core (2) is provided with a water through hole and a threaded hole; the valve is characterized in that a gland (8) is sleeved on the outer side of a valve rod (21) at the upper end of the valve core (2), and the gland (8) is fixedly connected with a threaded hole in the valve core (2) through a screw.

5. A pneumatic laminar cooling valve according to claim 4, characterized in that the valve stem (21) is of a stepped configuration, the upper end of the valve stem (21) being smaller and the lower end of the valve stem (21) being larger, the upper end of the valve stem (21) being provided with a thread matching the locking nut (43).

6. The pneumatic laminar cooling valve according to claim 5, characterized in that the locking nut (43) is a circular truncated cone structure with a small top and a big bottom, the upper end of the locking nut (43) is provided with a concave groove with an inverted T-shaped structure, and the concave part extends from the central position of the locking nut (43) to the edge for installing the guide rod (42).

7. The pneumatic laminar cooling valve according to claim 4, characterized in that the ends of the cylinder cover (41) and the cylinder head (46) close to the cylinder barrel (44) are in the shape of a circular truncated cone, a sealing groove is arranged in the center of the outer side of the circular truncated cone, and an O-shaped ring is sleeved in the sealing groove and used for tightly connecting the circular surface of the outer side of the circular truncated cone and the inner wall of the cylinder barrel (44); the centers of the cylinder cover (41) and the cylinder head (46) are sleeved with a sealing ring and a guide belt which are used for sealing and guiding the guide rod (42) and the valve rod (21); a sealing cover (9) is sleeved on the outer side of the guide rod (42) at the top end of the cylinder cover (41), and the sealing cover (9) is fixedly connected with the cylinder cover (41) through a screw; the outer side of the valve rod (21) at the bottom end of the cylinder head (46) is sleeved with a guide sleeve (48), and the guide sleeve (48) is fixedly connected with the cylinder head (46) through a screw.

8. A pneumatic laminar cooling valve according to claim 7, characterized in that a spacer (47) is arranged inside the water leakage cavity (49), and drainage holes (471) are arranged on both sides of the spacer (47).

9. A pneumatic laminar cooling valve according to any one of claims 1 to 8, characterized in that said manual adjustment assembly (6) comprises a hand wheel (62), a screw (65) and a seat (66); the support (66) is connected with a cylinder cover (41) of the cylinder assembly (4) through a stud; the screw rod (65) is vertically arranged inside the support (66), and the top end of the screw rod (65) penetrates through the top end support (66) and extends above the support (66); a detection nut (67) connected with the guide rod (42) is arranged below the screw rod (65), and the upper end surface of the detection nut (67) is abutted against the bottom end of the screw rod (65); the hand wheel (62) is fixedly connected with the top end of the screw rod (65) through a locking piece.

10. A pneumatic laminar cooling valve according to claim 9, characterized in that the seat (66) of the manual adjustment assembly (6) is also provided with a proximity switch (5); the detection nut (67) is in threaded connection with the upper end of the guide rod (42), moves up and down along with a moving part where the guide rod (42) is located, and is matched with the proximity switch (5) to form a sensor assembly for detecting the state of the valve position.

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