CN217736301U

CN217736301U - Improved stop regulating valve

Info

Publication number: CN217736301U
Application number: CN202222128453.5U
Authority: CN
Inventors: 金宗林; 陈海军
Original assignee: Jingjia Valve Group Co ltd
Current assignee: Jingjia Valve Group Co ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-11-04
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses an improved stop regulating valve, wherein a piston sleeve, a valve clack and a squirrel cage are arranged in a valve body middle cavity, a valve cover is arranged at the upper end of the valve body and presses the upper end of the piston sleeve, the squirrel cage is arranged at the lower end of the piston sleeve, the lower end of the squirrel cage is pressed on a main sealing pad, the inner diameters of the piston sleeve and the squirrel cage are equal, the valve clack is arranged in an inner cavity of the squirrel cage, a plurality of O-shaped sealing rings are arranged between the piston sleeve and the outer surface of the valve clack and move up and down along the squirrel cage inner cavity, and the valve clack presses the main sealing pad to seal at the lowest end position; the valve rod penetrates through the valve cover, the lower end of the valve rod is fixed in the mounting hole of the valve clack, a valve rod nut matched with the valve rod is installed on the valve cover, a hand wheel is installed at the upper end of the valve rod, and the valve rod drives the valve clack to move up and down. Parts such as packing, packing gland and the like are eliminated from the position of the valve rod of the device, the leakage caused by the bending deformation of the valve rod is reduced, and the cost is also reduced. The valve clack moves up and down in the piston sleeve and the squirrel cage inner cavity, cannot rotate, shake or incline, and has a good sealing effect.

Description

Improved stop regulating valve

Technical Field

The utility model relates to the field of machinary, especially, relate to the valve, specifically be a modified by governing valve.

Background

The stop valve belongs to a forced sealing type valve. When the valve is closed, pressure must be applied to the flap to force the sealing surface from leaking. When the medium enters the valve from the lower part of the valve clack, the resistance to be overcome by the operating force is the friction force between the valve rod and the packing and the thrust generated by the pressure of the medium acting on the valve clack.

In addition, the valve flap of the conventional shut-off valve is suspended by the valve stem alone, and when the medium flows, unbalanced force is generated, so that the valve flap and the valve stem are inclined, and the valve stem is bent during the valve closing process, so that the packing part is leaked.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose lies in overcoming above-mentioned technique not enough, provides a cage structure, and the improvement of packless seal ends the governing valve to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an improved stop regulating valve is characterized by comprising a valve body, a valve cover, a piston sleeve, a valve clack, a valve rod and a squirrel cage; the squirrel cage is arranged at the lower end of the piston sleeve, the lower end of the squirrel cage is pressed on the main sealing pad, the inner diameters of the piston sleeve and the squirrel cage are equal, the valve clack is arranged in the inner cavity of the squirrel cage, a plurality of O-shaped sealing rings are arranged between the piston sleeve and the outer surface of the valve clack, the valve clack moves up and down along the inner cavity of the squirrel cage, and the valve clack is pressed on the main sealing pad to be sealed when the valve clack is at the lowest end of the stroke;

the valve rod penetrates through the valve cover, the lower end of the valve rod is fixed in the mounting hole of the valve clack, a valve rod nut matched with the valve rod is installed on the valve cover, a hand wheel is installed at the upper end of the valve rod, and the valve rod drives the valve clack to move up and down.

The technical problem to be solved by the utility model can also be realized by the following technical proposal, the squirrel cage is provided with a cylindrical barrel body, and a plurality of rows of through holes are symmetrically arranged on the barrel body; the valve body is provided with a stepped hole for fixing the lower part of the cylinder body, and the contact part of the upper end of the squirrel cage, the piston sleeve and the valve clack is provided with an O-shaped ring.

The utility model discloses the technical problem that will solve can also be realized through following technical scheme, the valve clack is equipped with cylindric valve clack body, and the lower terminal surface of cylindric valve clack body is equipped with a flat board for the smooth plane with the main seal pad complex in the inner chamber of cylindric valve clack body, and dull and stereotyped center department is equipped with the valve rod mounting hole.

The utility model discloses the technical problem that will solve can also be realized through following technical scheme, the lower extreme of valve rod is equipped with to the ring, runs from opposite directions the ring and establishes in the valve rod mounting hole, is equipped with on the mounting hole and pushes down the clamp plate of running from opposite directions the ring, and the clamp plate passes through the fix with screw on cylindric valve clack body.

The utility model discloses the technical problem that will solve can also be realized through following technical scheme, the upper portion of valve rod is equipped with screw thread and square head, and the hand wheel dress is overhead at the square, and supporting fastening nut who is equipped with the fastening hand wheel on the screw thread, and the middle part of screw rod is equipped with trapezoidal thread, valve-stem nut and trapezoidal thread fit.

The utility model discloses the technical problem that will solve can also be realized through following technical scheme, the valve gap passes through double-screw bolt and nut to be fixed on the valve body, is equipped with the guiding hole that the valve rod passed at the middle part of valve gap, still is equipped with two gas pockets on the valve gap.

The utility model discloses the technical problem that will solve can also be realized through following technical scheme, be equipped with the boss on the valve gap, be equipped with the recess on the valve body, the piston sleeve upper end is equipped with the installation step, and the installation step is established between boss and recess, is equipped with the slot under the valve body recess on the plane, is equipped with O type sealing washer in the slot.

The device has the advantages that the valve cover is arranged at the upper end of the valve body, the valve cover presses the piston sleeve, the piston sleeve presses the mouse cage, the mouse cage is pressed on the main sealing pad, the long cylindrical valve clack moves up and down in the inner cavity of the mouse cage sleeved by the piston sleeve, and the valve clack is pressed on the main sealing pad at the lowest end to achieve the sealing effect.

The valve rod is inserted into the installing hole of the valve clack and connected together by the split ring and the pressure plate. The valve rod penetrates through the valve cover to be matched with a valve rod nut arranged at the upper end of the valve cover, and the hand wheel is arranged at the square head of the valve rod and fixed together by a fastening nut.

When the hand wheel is rotated, the valve rod nut is fixed on the valve cover, and the valve rod starts to move upwards or downwards due to the matching of the trapezoidal threads and the valve rod nut, so that the valve rod drives the valve clack to move upwards and downwards.

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

1) Parts such as packing, a packing gland and the like are omitted at the position of the valve rod, so that leakage caused by bending deformation of the valve rod is reduced, and the cost is also reduced.

2) The valve clack moves up and down in the piston sleeve and the squirrel cage inner cavity, cannot rotate, rock or tilt, and has good sealing effect.

3) Except that the piston sleeve and the squirrel cage have certain precision to the cooperation of valve clack excircle, other parts machining precision requirements have reduced to production efficiency improves, cost reduction.

4) The lower end face of the valve clack and the main sealing gasket are used as main sealing to stop the flow of a medium, the valve abandons the design of sealing a valve rod, and the valve rod only plays a role of transmission, thereby simplifying the structure of the valve.

Drawings

FIG. 1 is a schematic diagram of the present apparatus;

fig. 2 is a partially enlarged schematic view of fig. 1.

1. A valve body; 2. a primary seal gasket; 3. a mouse cage; 4. a valve clack; 5. an O-shaped ring; 6. opening the ring; 7. a piston sleeve; 8. an O-shaped sealing ring; 9; a valve cover; 10. a valve stem nut; 11. a hand wheel; 12. fastening a nut; 13. a valve stem; 14. a nut; 15. a stud; 16. an O-shaped sealing ring; 17. a screw; 18. and (7) pressing a plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the embodiments of the present invention and the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: an improved stop regulating valve comprises a valve body 1, a valve cover 9, a piston sleeve 7, a valve clack 4, a valve rod 13 and a squirrel cage 3; the piston sleeve 7, the valve clack 4 and the squirrel cage 3 are arranged in the cavity of the valve body 1, the valve cover 9 is arranged at the upper end of the valve body 1 and fixed on the valve body 1 through a stud 15 and a nut 14, and the upper end of the piston sleeve 7 is pressed. The middle part of the valve cover 9 is provided with a guide hole for the valve rod 13 to pass through, and the valve cover 9 is also provided with two air holes, so that when the valve clack 4 moves up and down, the high pressure and the low pressure generated in the middle cavity can be avoided.

The improved valve is characterized in that a boss is arranged on the valve cover 9, a groove is formed in the valve body 1, an installation step is arranged at the upper end of the piston sleeve 7 and is arranged between the boss and the groove, a groove is formed in the lower plane of the groove of the valve body 1, and an O-shaped sealing ring 8 is arranged in the groove. This forms both a seal against leakage and also a fixing of the piston sleeve 7.

The squirrel cage 3 is arranged at the lower end of the piston sleeve 7, the squirrel cage 3 is pressed by the lower plane of the piston sleeve 7, the lower end of the squirrel cage 3 is pressed on the main sealing gasket 2, and the inner diameters of the piston sleeve 7 and the squirrel cage 3 are equal. The squirrel cage 3 is provided with a cylindrical barrel body, the barrel body is provided with a plurality of rows of symmetrically arranged through holes, the medium flows from the holes, and the quantity of exposed holes can be controlled according to the position of the valve clack 4, so that the flow and the pressure of the medium can be controlled. The valve body 1 is provided with a stepped hole for fixing the lower part of the cylinder body, and the lower end of the squirrel cage 3 compresses the main sealing gasket 2 and is sleeved in the stepped hole corresponding to the valve body 1, so that the squirrel cage 3 is firmly fixed at the position and cannot change the position due to medium flowing and impact. An O-shaped ring 5 is arranged at the contact part of the upper part of the squirrel cage 3 and the piston sleeve 7 and the valve clack 4. And impurities in the medium are prevented from entering a gap between the piston sleeve 7 and the valve clack 4, and jamming is avoided.

The valve clack 4 is arranged in an inner cavity of the

squirrel cage

3, 2 grooves are formed in the lower end of the inner circle of the piston sleeve 7, O-shaped sealing rings 16 are arranged in the grooves, and the two O-shaped sealing rings 16 and the outer surface of the valve clack 4 form sealing together to prevent a medium from leaking into the middle cavity of the valve body 1.

The valve clack 4 is provided with a long cylindrical valve clack 4 body, the lower end face of the cylindrical valve clack 4 body is a smooth plane matched with the main sealing gasket 2, a flat plate is arranged in an inner cavity of the cylindrical valve clack 4 body, and a valve rod 13 mounting hole is formed in the center of the flat plate. When the valve clack 4 is in the full-closed position, namely the lowest end position, the lower end surface of the cylinder tightly presses the main sealing gasket 2 to form sealing specific pressure, so that the sealing effect is achieved.

The valve rod 13 penetrates through the valve cover 9, the lower end of the valve rod 13 is fixed in the mounting hole of the valve clack 4, a valve rod nut 10 matched with the valve rod 13 is installed on the valve cover 9, a hand wheel 11 is installed at the upper end of the valve rod 13, and the valve rod 13 drives the valve clack 4 to move up and down.

The upper portion of valve rod 13 is equipped with screw thread and square head, and hand wheel 11 dress is on square head, and the supporting fastening nut 12 that is equipped with fastening hand wheel 11 on the screw thread, screws up fastening nut 12 and prevents that hand wheel 11 from breaking away from valve rod 13. The middle part of the screw rod is provided with a trapezoidal thread, and the valve rod nut 10 is matched with the trapezoidal thread. The lower end of the valve rod 13 is provided with a split ring 6, the split ring 6 is arranged in a mounting hole of the valve rod 13, a pressure plate 18 for pressing the split ring 6 is arranged on the mounting hole, and the pressure plate 18 is fixed on the cylindrical valve clack 4 through a screw 17. The split ring 6 can be prevented from being separated from the mounting hole, so that when the hand wheel 11 is rotated, the valve rod 13 rotates simultaneously, and moves up and down under the influence of the valve rod nut 10, and the valve rod 13 moves up and down to drive the valve clack 4 to move up and down, so that the purpose of opening and closing the valve is achieved.

The device is characterized in that a valve cover 9 is installed at the upper end of a valve body 1, the valve cover 9 presses a piston sleeve 7, the piston sleeve 7 presses a mouse cage 3, the mouse cage 3 is pressed on a main sealing gasket 2, a long cylindrical valve clack 4 moves up and down in the inner cavity of the mouse cage 3 of the piston sleeve 7, and the valve clack 4 is pressed on the main sealing gasket 2 to achieve a sealing effect at the lowest end position. The lower end face of the valve clack 4 and the main sealing gasket 2 are used as main sealing to stop medium flowing, the valve abandons the design that a valve rod 13 is required to be sealed in the past, the valve rod 13 only plays a role in transmission, and the valve structure is simplified. Parts such as packing, a packing gland and the like are omitted at the position of the valve rod 13, so that leakage caused by bending deformation of the valve rod 13 is reduced, and the cost is also reduced. The valve clack 4 moves up and down in the piston sleeve 7 and the squirrel cage 3, and can not rotate, rock or incline, and the sealing effect is good.

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

Claims

1. An improved stop regulating valve is characterized in that: comprises a valve body, a valve cover, a piston sleeve, a valve clack, a valve rod and a squirrel cage; the squirrel cage is arranged at the lower end of the piston sleeve, the lower end of the squirrel cage is pressed on the main sealing pad, the inner diameters of the piston sleeve and the squirrel cage are equal, the valve clack is arranged in the inner cavity of the squirrel cage, a plurality of O-shaped sealing rings are arranged between the piston sleeve and the outer surface of the valve clack, the valve clack moves up and down along the inner cavity of the squirrel cage, and the valve clack is pressed on the main sealing pad to be sealed when the valve clack is at the lowest end of the stroke;

2. An improved shut-off regulator valve as defined in claim 1 wherein: the squirrel cage is provided with a cylindrical barrel, and the barrel is provided with a plurality of rows of symmetrically arranged through holes; the valve body is provided with a stepped hole for fixing the lower part of the cylinder body, and the contact part of the upper end of the squirrel cage, the piston sleeve and the valve clack is provided with an O-shaped ring.

3. An improved shut-off regulating valve as defined in claim 1, wherein: the valve clack is equipped with cylindric valve clack body, and the lower terminal surface of cylindric valve clack body is for the smooth plane with the main seal pad complex, is equipped with a flat board in the inner chamber of cylindric valve clack body, and dull and stereotyped center department is equipped with the valve rod mounting hole.

4. An improved shut-off regulator valve as defined in claim 1 wherein: the lower end of the valve rod is provided with a split ring, the split ring is arranged in a valve rod mounting hole, a pressing plate for pressing the split ring is arranged on the mounting hole, and the pressing plate is fixed on the cylindrical valve clack body through a screw.

5. An improved shut-off valve as defined in claim 4 wherein: the upper portion of the valve rod is provided with threads and a square head, the hand wheel is arranged on the square head, a fastening nut for fastening the hand wheel is arranged on the threads in a matched mode, trapezoidal threads are arranged in the middle of the screw rod, and the valve rod nut is matched with the trapezoidal threads.

6. An improved shut-off regulator valve as defined in claim 1 wherein: the valve cover is fixed on the valve body through a stud and a nut, a guide hole through which the valve rod penetrates is formed in the middle of the valve cover, and two air holes are formed in the valve cover.

7. An improved shut-off valve as defined in claim 6 wherein: the valve is characterized in that a boss is arranged on the valve cover, a groove is formed in the valve body, an installation step is arranged at the upper end of the piston sleeve and is arranged between the boss and the groove, a groove is formed in the lower plane of the groove of the valve body, and an O-shaped sealing ring is arranged in the groove.