CN218971837U - Bellows seal regulating valve with anti-rotation function - Google Patents

Abstract

The utility model discloses a corrugated pipe sealing regulating valve with an anti-rotation function, which comprises a valve body and a valve cover, wherein a valve seat, a sleeve valve core and a valve rod which is arranged in linkage with the sleeve valve core are arranged in the valve body, the upper end of the valve rod passes through the valve cover and is arranged outside, the bottom of the valve rod passes through the sleeve valve core and is locked by a nut, a corrugated pipe assembly is sleeved outside the valve rod, the corrugated pipe assembly comprises a lower connecting ring, a corrugated pipe and an upper connecting ring, the upper end of the valve rod is provided with a positioning groove, a positioning block which is matched with the positioning groove is arranged on the inner side of the positioning ring, the positioning ring is fixedly connected with the valve cover, and the corrugated pipe assembly is arranged between the positioning ring and the sleeve valve core and is used for forming axial sealing of the valve rod. Utilize the circumferential motion of holding ring restriction valve rod, avoided because the rotation of valve rod leads to the phenomenon that the bellows was tensile to be damaged to appear, the cooperation of valve rod bottom and sleeve case adopts threaded connection simultaneously, the dismantlement of follow-up bellows of being convenient for is changed.

Description

Bellows seal regulating valve with anti-rotation function

Technical Field

The utility model particularly relates to a corrugated pipe sealing regulating valve with an anti-rotation function.

Background

With the rapid development of society and economy, a regulating valve is also called a control valve, and in the field of industrial automation process control, a final control element for changing process parameters such as medium flow, pressure, temperature, liquid level and the like by means of power operation is generally composed of an executing mechanism and a valve by receiving a control signal output by a regulating control unit. In the automatic control of modern plants, control valves play a very important role, the production of these plants being dependent on the correct distribution and control of the flowing medium. These controls, whether energy exchange, pressure reduction or simple vessel charging, require some final control element to accomplish.

In petrochemical industry, some valves with toxic, volatile or valuable fluids are generally sealed by using a corrugated pipe, for example, a corrugated pipe sealing regulating valve is disclosed in Chinese patent CN112361068A, and the corrugated pipe is adopted to avoid medium leakage loss, prevent dangerous or environmental pollution caused by the leakage of toxic and explosive medium, but damage the corrugated pipe along with the increase of service time, so that the corrugated pipe needs to be replaced, but in the disassembly process, the damage of part of the corrugated pipe is found because the medium has a certain pressure difference to drive a valve core to rotate, a valve rod rotates along with the valve rod, and the corrugated pipe is pressed under an upper cover and does not act, so that the corrugated pipe is pulled to be damaged, and the structure of the corrugated pipe is invalid.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide the corrugated pipe sealing regulating valve with the anti-rotation function.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a take bellows seal control valve of function of preventing changeing, it includes valve body and valve gap, be equipped with the disk seat in the valve body, arrange sleeve on the disk seat, can slide the sleeve case of arranging in the sleeve and the valve rod that sets up with the linkage of sleeve case, the valve rod upper end passes the valve gap and is put in outside, the bottom of valve rod passes sleeve case and by the nut locking, the valve rod overcoat is equipped with the bellows subassembly, the bellows subassembly includes go-between, bellows and last go-between, the valve rod upper end is equipped with the holding ring, the valve rod upper end is equipped with the constant head tank, the holding ring inboard is equipped with the locating piece with the holding tank looks adaptation, holding ring and valve gap fixed connection, the bellows subassembly sets up with between holding ring and the sleeve case, and is used for forming the axial seal of valve rod.

The diameters of the two ends of the valve rod are smaller than the diameter of the middle section.

And the bottom end of the valve rod is in threaded connection with the sleeve valve core.

The nut is in spot welding connection with the valve rod.

The valve cover comprises an upper valve cover and a middle valve cover, and a groove for embedding an upper connecting ring is formed in the matching position of the upper valve cover and the middle valve cover.

Graphite composite pads are respectively arranged on the upper side and the lower side of the upper connecting ring.

The locating ring is symmetrically provided with limiting grooves on the outer side, the locating ring and the valve cover are fixed through fastening screws, and the fastening screws penetrate through the limiting grooves.

Through holes are formed in the circumference of the sleeve at equal intervals.

The through hole comprises an upper transverse groove and a lower transverse groove which are connected through an isosceles triangle groove.

Both sides of the isosceles triangle groove are arc-shaped.

The utility model has the beneficial effects that: utilize the circumferential motion of holding ring restriction valve rod, avoided because the rotation of valve rod leads to the phenomenon that the bellows was tensile to be damaged to appear, the cooperation of valve rod bottom and sleeve case adopts threaded connection simultaneously, the dismantlement of follow-up bellows of being convenient for is changed.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model.

Fig. 2 is an enlarged schematic view at a in fig. 1.

FIG. 3 is an enlarged schematic view of the mating of the retaining ring and the valve stem.

Fig. 4 is a schematic structural view of the positioning ring.

Fig. 5 is a schematic structural view of the sleeve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

As shown in the figure, the utility model discloses a corrugated pipe sealing regulating valve with an anti-rotation function, which comprises a valve body 1 and a valve cover, wherein a valve cavity is formed between the valve body and the valve cover, the valve cover comprises an upper valve cover 3 and a middle valve cover 2, a valve seat 11, a sleeve 10 arranged on the valve seat, a sleeve valve core 9 slidably arranged in the sleeve and a valve rod 4 arranged in linkage with the sleeve valve core are arranged in the valve body, wherein the sleeve valve core is arranged in the sleeve and can move up and down under the driving of the valve rod and is matched with the sleeve to realize the regulation of flow, the upper end of the valve rod passes through the valve cover and is arranged outside and is in linkage with an actuator, the sleeve valve core is driven by the actuator to act, the bottom of the valve rod passes through the sleeve valve core and is locked by a nut 12, the valve rod is sleeved with a corrugated pipe assembly, the corrugated pipe assembly comprises a lower connecting ring 8, a corrugated pipe 7 and an upper connecting ring 6, the upper end of the valve rod is provided with a positioning ring 5, the upper end of the valve rod is provided with a positioning groove 41, and the inner side of the positioning ring is provided with a positioning block 51 matched with the positioning groove, the positioning ring is fixedly connected with the positioning ring, and the positioning ring is used for limiting the rotation of the valve rod to move only between the upper valve rod and the valve core and the circumferential sealing ring is arranged.

The diameters of the two ends of the valve rod are smaller than the diameter of the middle section, a large contact surface is used for replacing a small contact surface, and an effective gap is reserved to ensure effective pretightening force.

The bottom end of the valve rod is in threaded connection with the sleeve valve core, and the valve rod and the nut are in double-threaded connection, so that the valve rod and the nut are fixed, and the bellows assembly can be replaced conveniently.

The nut is in spot welding connection with the valve rod, and the stopping of the nut is realized by spot welding.

The cooperation department of upper valve gap and middle valve gap is equipped with the recess that is used for inlaying to establish the go up the go-between for the fixed bellows subassembly avoids its landing, influences the leakproofness of bellows.

The upper and lower sides of the upper connecting ring are respectively provided with a graphite composite pad, so that the sealing effect is achieved.

The locating ring outside symmetry is equipped with spacing groove 52, the locating ring passes through fastening screw with the valve gap and fixes, fastening screw passes the spacing groove sets up for the limiting ring rotates, and then makes the valve rod can not circumference rotate.

Through holes are formed in the circumference of the sleeve at equal intervals. The through hole comprises an upper transverse groove 102 and a lower transverse groove 101, which are connected through an isosceles triangle groove 103, and the two sides of the isosceles triangle groove are arc-shaped. Through the shape of the through hole, the output of different flow rates is realized through the action of the sleeve valve core.

The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.

Claims (10)

1. The utility model provides a bellows seal control valve of function is prevented changeing in area which characterized in that: the valve comprises a valve body and a valve cover, wherein a valve seat, a sleeve arranged on the valve seat, a sleeve valve core arranged in the sleeve in a sliding manner and a valve rod arranged in a linkage manner with the sleeve valve core are arranged in the valve body, the upper end of the valve rod penetrates through the valve cover and is arranged outside, the bottom of the valve rod penetrates through the sleeve valve core and is locked by a nut, a corrugated pipe assembly is sleeved outside the valve rod and comprises a lower connecting ring, a corrugated pipe and an upper connecting ring, a positioning ring is arranged at the upper end of the valve rod, a positioning groove is arranged at the upper end of the valve rod, a positioning block matched with the positioning groove is arranged at the inner side of the positioning ring, the positioning ring is fixedly connected with the valve cover, and the corrugated pipe assembly is arranged between the positioning ring and the sleeve valve core and is used for forming axial sealing of the valve rod.

2. The bellows seal regulating valve with anti-rotation function according to claim 1, wherein: the diameters of the two ends of the valve rod are smaller than the diameter of the middle section.

3. The bellows seal regulating valve with anti-rotation function according to claim 1 or 2, characterized in that: and the bottom end of the valve rod is in threaded connection with the sleeve valve core.

4. The bellows seal regulating valve with anti-rotation function according to claim 1 or 2, characterized in that: the nut is in spot welding connection with the valve rod.

5. The bellows seal regulating valve with anti-rotation function according to claim 1, wherein: the valve cover comprises an upper valve cover and a middle valve cover, and a groove for embedding an upper connecting ring is formed in the matching position of the upper valve cover and the middle valve cover.

6. The bellows seal regulating valve with anti-rotation function according to claim 5, wherein: graphite composite pads are respectively arranged on the upper side and the lower side of the upper connecting ring.

7. The bellows seal regulating valve with anti-rotation function according to claim 1, wherein: the locating ring is symmetrically provided with limiting grooves on the outer side, the locating ring and the valve cover are fixed through fastening screws, and the fastening screws penetrate through the limiting grooves.

8. The bellows seal regulating valve with anti-rotation function according to claim 1, wherein: through holes are formed in the circumference of the sleeve at equal intervals.

9. The bellows seal regulating valve with anti-rotation function according to claim 8, wherein: the through hole comprises an upper transverse groove and a lower transverse groove which are connected through an isosceles triangle groove.

10. The bellows seal regulating valve with anti-rotation function according to claim 9, wherein: both sides of the isosceles triangle groove are arc-shaped.

Images