TW201530028A - Valve assembly with a seal ring applied no normal force to a valve seat - Google Patents

Abstract

A triple eccentric valve with a symmetric drain-proof ring applied no normal force to a valve seat comprising: a valve body having a chamber therein; a wall of the chamber being formed with an annular trench for receiving an annular seat; a radial cross section of the annular seat having a trapezoidal shape; the annular seat being detachable; a stem penetrating through the valve body so as to protrude into the chamber; a top end protruding from the valve body having an operation unit for driving the stem to rotate; a valve disk installed in the chamber of the valve body and contacting an inner wall of the annular seat a radial hole being formed radially along the valve disk for receiving the stem so that rotation of the stem will rotate the valve disk for opening or closing the valve; and a rear side of the valve disk being formed with a stepped recess and an axial surface in the stepped recess of the valve disk (31) being formed with an annular trench; the valve disk is formed as an asymmetric conical shape; a waterproof washer being a ring and being received in the annular trench of the valve disk; and a drain-proof ring being an O ring and being arranged in the stepped recess of the valve disk to seal the waterproof washer; the drain-proof ring being symmetric to the axis of the ring; in assembly state, a periphery of the drain-proof ring (32) resisting against an inner wall of the annular seat so as to tightly seal the space between the drain-proof ring and the annular seat; and wherein an inner side or a part of the valve seat (30) has a shape matched to a sweeping track of "an outermost point" of the drain-proof ring so that when the drain-proof ring moves along the valve seat, only friction force tangent to the inner surface of the valve seat is applied from the drain-proof ring to the valve seat without normal force is applied from the drain-proof ring to the valve seat); wherein after assembly, a left side of an outer periphery of an assembled structure including the valve disk, the waterproof washer and the drain-proof ring has a conical shape; and when the waterproof washer deforms, the drain-proof ring has preferred flexibility, which can compensate the gap due to the deformation.

Description

A valve valve structure in which the sling ring does not impart a positive force to the valve seat

This creation is about the valve body, especially a valve structure that does not apply a positive force to the valve seat.

In a conventional butterfly valve, the butterfly valve includes a shaft bore extending through a radial direction for insertion of a drive shaft and thereby driving the butterfly valve to open or close the valve as a design of the triple eccentric shaft. As shown in FIG. 9, a three-eccentric valve in the prior art is shown, wherein the valve comprises: a valve body 1' having a valve chamber 10'; a valve stem 2' through which the valve stem penetrates Body 1'. A valve seat 30' is housed in the valve chamber 10'. A snorkeling ring 32' is an O-ring, and the ends of the radial section of the stagnation ring 32' are symmetrical. a valve member 31' is disposed on the valve seat 30'. The valve member 31' is axially provided with a shaft hole 310' for allowing the valve stem to penetrate therethrough for control The valve member 31' is opened and closed.

The stop mechanism is a three-eccentric arrangement; the so-called three-eccentric shaft means that the axis of the shaft deviates from the center line formed by the lower ends of the cross section of the valve body (please refer to FIG. 3B), so First eccentricity (A). The axial center line of the valve body is offset from the center line of the pipe, so that the second eccentricity (B) is formed, and the vertebral body formed by the side edges of the two sides of the valve body is not a positive pyramid, but the tip is biased to one side. Eccentric cone. Wherein the two sides of the cone are not parallel to the axial direction of the pipe, so that the third eccentricity (C) is formed. In the prior art, one side of the cone is parallel to the axial direction of the pipeline, so the stagnation ring must The angles that can be matched to each other are processed according to their angles, and when the stagnation ring is rotated, when the angle is not in agreement, there is a possibility of leakage.

In the prior art, the valve seat is matched with the design of the three off-axis, and the inclination of the inner edge of the valve seat must conform to the inclination of the eccentric cone, that is, as shown in the figure, the upper edge of the valve seat has a The slope is horizontal; the lower edge of the valve seat is horizontal; and the two slopes coincide with the slope of the positive pyramid. The slope of the entire inner edge changes continuously from top to bottom.

Due to the design of the above-mentioned positive-angle cone, in order to completely seal the valve body in order to achieve the stagnation ring, the annular stagnation ring must form a radial circular asymmetrical shape with respect to its axis, which has made the circular asymmetry When the stagnation ring is mounted on the outer edge of the valve to support the valve seat, the edge of the stagnation ring can be closely attached to the inner edge of the valve seat at different positions to form a completely sealed form. Since the stagnation ring is a circular circular asymmetry formed with respect to its axial center, it is quite difficult to manufacture, and there is a problem of directionality during installation, and the stagnation ring must be inserted in a set orientation. In the valve body. However, when the sluice ring slides, the water seal is destroyed. Furthermore, as shown in FIG. 8, since the annular surface of the stagnation ring 32' is not symmetrical, and the outer surface of the venting ring 32' is not straight, the frictional force of the valve member must be generated when the valve member is rotated. Pressing against the seat surface against the force will deform the valve seat for a long time, causing the entire valve body to change. If the stagnation ring 32' is stuck by impurities or is slightly deformed, a new stagnation ring must be replaced. It is quite inconvenient to operate and also increases the cost of use.

Therefore, the purpose of the present invention is to solve the above-mentioned problems in the prior art. In the present invention, a door valve structure in which the stagnation ring does not apply a positive force to the valve seat is proposed. When the valve stem is activated and the valve member is rotated, the The outer edge of the venting ring will cut through the valve seat in a tangential direction, so there is only friction between the two There is no positive force, and there is no pressing force on the valve seat. When a foreign object is stuck on the valve seat, the foreign matter is discharged to the entire valve along the tangential direction. Since the stagnation ring is completely symmetrical, even if there is a slight gap between the stagnation ring and the valve seat, the stagnation ring can be rotated at an angle to obtain a better leak stop point. Since the stagnation ring 32 is completely symmetrical, there is no alignment problem at the time of installation.

In order to achieve the above object, the present invention proposes a door valve structure in which the stagnation ring does not apply a positive force to the valve seat, comprising: a valve body having a valve chamber; a valve seat being accommodated in the valve chamber; the valve The seat is slightly annular, and the valve seat has a trapezoidal radial section; a valve member is disposed in the valve chamber, the outer edge of the valve seat abuts against the valve seat, and the valve member has a shaft hole in the axial direction The shaft hole is used for allowing a valve stem to penetrate therethrough to control the opening and closing of the valve member, and the opening and closing of the valve member can regulate the flow through the fluid; a stagnation ring, the stagnation ring is a symmetry The O-ring of the center of the circle, and the outer ring surface of the stagnation ring is convexly curved in the radial direction, and is placed on the outer side of the valve member to abut against the valve seat, and the radial direction of the stagnation ring is symmetrically passed An axis of the center of the stagnation ring; wherein an annular band-shaped region of the inner circumferential surface of the valve seat is shaped to align the trajectory surface swept by the trajectory of the outer edge of the stagnation ring, that is, the trajectory surface An annular portion of the profile is equal to the shape of an annular band-shaped region of the inner edge annulus of the valve seat, that is, when the valve stem is rotated When the sling ring is stopped, the outer edge of the stagnation ring just cuts through the annular band-shaped region, that is, when the stagnation ring is cut, the valve seat is not given a positive force, so the valve seat is not pushed. Therefore, the stagnation ring produces an excellent seal when it contacts the valve seat.

The above-mentioned characteristics of the present invention are particularly applicable to a triple eccentric valve having a symmetrical stagnation ring, and the eccentric cone is designed such that the annular stagnation ring can be radially symmetric with respect to its axis. That is, the circular symmetrical structure, when the stagnation ring is mounted on the outer edge of the valve to support the valve seat, the stagnation ring The edges can be placed in close proximity to the inner edge of the valve seat at different locations to form a completely sealed form. Since the stagnation ring is circularly symmetrical with respect to its axial center, it is relatively simple to manufacture, and there is no directional problem during installation. The stagnation ring can be directly inserted in either direction. In the valve body. The seal can still be achieved when the sling ring slides.

The features of the present invention and its advantages can be further understood from the description below, and please refer to the attached drawings when reading.

1‧‧‧ valve body

10‧‧‧Valves

11‧‧‧ ladder

2‧‧‧ valve stem

30‧‧‧ valve seat

31‧‧‧ Valves

310‧‧‧Axis hole

311‧‧‧Step form

313‧‧ ‧ Groove

315‧‧‧ surface

32‧‧‧Stop ring

33‧‧‧Water stop washer

34‧‧‧Seal

4‧‧‧ side cover

40‧‧‧ screws

41‧‧‧Step

5‧‧‧Outer cover

50‧‧‧ screws

Figure 1A shows an exploded view of the valve of the present invention.

Figure 1B shows a cutaway view of the valve member of the present invention.

Figure 1C shows a cutaway view of the finger ring of the present creation.

Figure 1D shows a cutaway view of the inner cover of the present invention.

Figure 2 shows a perspective view of the valve assembly of the present invention.

Figure 3A shows a cross-sectional view of the valve of the present creation.

Figure 3B shows another cross-sectional view of the valve of the present invention.

Figure 4 is a cross-sectional view showing the valve body of the present invention.

5A and 5B are a cross-sectional view and a perspective view showing the vent ring of the valve body of the present invention.

6A and 6B are cross-sectional and perspective cross-sectional views showing the combination of the valve of the present invention.

Fig. 7A shows a schematic view of the rotational trajectory of the snorkel and the valve seat of the present invention.

Fig. 7B shows a schematic diagram of the exclusion of foreign matter in the vent ring of the present invention.

Figure 7C shows a schematic view of a stagnation ring squeeze valve seat in the prior art.

Figure 8 shows a schematic diagram of a stagnation ring in the prior art.

Figure 9 shows a cross-sectional view of a valve of the prior art.

Figure 10 shows a partial exploded view of the valve body of the present invention showing a symmetrical stagnation ring.

In view of the structural composition of the case, and the functions and advantages that can be produced, in conjunction with the drawings, a preferred embodiment of the present invention is described in detail below.

Referring to Figures 1A, 1B, 1C, 1D to Figure 6, the three eccentric valves of the present invention are shown, including the following components:

A valve body 1, the inner ring wall of the valve body forms a valve chamber 10; the outer ring of the valve body 1 is like a step 11 (please refer to FIG. 1B). A valve seat 30 is received in the valve chamber 10; the valve seat is slightly annular, and the valve seat has a trapezoidal radial cross section. In this case, the valve seat is a detachable structure.

a valve stem 2, the valve stem penetrates through the valve body 1, the valve stem top end can be coupled with a valve operator (not shown) for driving the valve body to rotate, so that the valve body can be selectively opened Or close the pipe diameter through hole.

A valve member 31 is disposed inside the valve seat 30. The axial direction of the valve member 31 is provided with a shaft hole 310 for allowing the valve stem 2 to penetrate therethrough to control the valve member 31. Opening and closing, the opening and closing of the valve member 31 can regulate the flow rate through the fluid; wherein the valve member 31 The outer edge has a stepped shape 311, and a groove 313 is formed on the surface 315 of the stepped form 311 near the outer edge (refer to Fig. 1C).

An inner cover body 4 having a diameter corresponding to the diameter of the through hole of the valve member 31. The inner cover body 4 is provided with a plurality of screw holes on one surface thereof, and the side cover body uses a plurality of screws 40, through the screw holes, locked on one side of the pipe diameter through hole. As shown in FIG. 1D, the outer ring of the inner cover 4 forms a step 41.

An outer cover body 5 having a diameter corresponding to the diameter of the through hole of the valve body 1. The outer cover body 5 is provided with a plurality of screw holes on one surface thereof, and the side cover body uses a plurality of screws 50, through the screw holes, locked on one side of the pipe diameter through hole.

A stop mechanism 3, the stop mechanism includes (please refer to FIG. 1A):

A snorkel ring 32 (refer to FIGS. 5A and 5B), the snorkel ring 32 is an O-ring that is received by the stepped shape 311 of the outer edge of the outer side of the valve member 31 to abut the valve seat 30. The radial direction of the stagnation ring 32 is symmetric with respect to the axis passing through the center of the stagnation ring 32, and the top of the stagnation ring 32 is slightly arcuate.

Wherein the stagnation ring is a ring composed of a silicone ring or a graphite or PTEF material, and according to the design of the present invention (to be described later), the symmetrical stop ring 32 can contact any point of the valve seat 30. The seal is stopped and the force is evenly distributed.

a water stop washer 33, the water stop washer 33 is a ring, and the water stop washer 33 is located in the groove 313 formed on the surface 312 of the stepped shape 311 of the valve member 31 (please refer to FIGS. 3A and 3B), and Between the valve member 31 and the stagnation ring 32. The water stop washer 33 is generally made of a metal material. When the water stop washer 33 is deformed, since the stagnation ring 32 has better elasticity, the stop can be compensated The gap created by the deformation of the water washer 33 provides a relatively good water seal.

a ring 34, the ring 34 is a ring having a notch on the side of the ring, the ring 34 is located in a groove of the step 11 of the outer ring of the valve body 1, and is interposed between the valve body 1 Between the side cover 5 and the side cover 5. The seal ring 34 is generally constructed of a metal material.

The stop mechanism of the present case is a eccentric arrangement; the so-called triple eccentricity means that the axial center line P of the valve member 31 in the radial direction deviates from the center formed by the lower ends of the cross section of the valve body 1 Line P' (please refer to FIG. 3A), such that there is a spacing A between the axis P and the centerline P', which is the first eccentricity.

The axial center line Q of the valve member 31 is offset from the center line Q' of the valve chamber of the valve body 1 such that there is a gap B between the axial center line Q and the center line Q' of the valve body 1, so Form a second eccentricity.

As shown in FIG. 3B, the valve member 31 forms an asymmetrical taper, wherein the two extension lines R, R' formed by the side edges of the upper and lower sides are asymmetrical, but the extension line R of the upper side edge is opposite to the valve member. The slope of the center line of 31 (takes an absolute value) is larger than the slope of the lower side edge extension line R' with respect to the center line of the valve member 31 (absolute value), as shown in FIG. 3B, the two inclined lines R, R 'Extension to the left is an intersection point I. The distance d between the intersection I and the center line Q' of the valve body 1 is not greater than the radius of the valve member. This constitutes a third eccentricity.

In the design of the present case, the vertebral body formed by the valve member which is different from the prior art is not a positive pyramid, but an eccentric cone whose tip is biased to one side. The deflection of the apex of the eccentric cone is the same as the deviation of the axial center line Q of the valve member from the center line Q' of the valve body 1. Where the cone Both sides are not parallel to the axial direction of the pipe, that is, the two inclined lines are not parallel to the center line of the valve member 31.

As shown in Fig. 5, but in the present case, the stagnation ring 32 can be a ring symmetrical to the axis passing through the center of the circle, so that the process is relatively simple. Referring to Figure 8, which shows the venting ring 32' of the prior art as an asymmetrical ring, this type of ring is quite difficult to manufacture because the arc of each angle must be manufactured to the specifications of the design. In addition, since the stagnation ring 32 in the present case has a symmetrical structure, when the stagnation ring 32 is sleeved to the valve member 31 and then mounted to the inside of the valve body 1, precise alignment is not required, so The installation work is quite simple. The main reason is that the stagnation ring 32 of the present invention can be applied to the inner edge of the valve body 1 by applying different axial positions of its outer periphery to achieve the purpose of sealing. However, with respect to the structure of the prior art of Fig. 8, since the stagnation ring 32' is asymmetrical, it is necessary to accurately align the position during installation, and there is a possibility of leakage when the position is deviated. On the other hand, when the valve of the present invention is in use, when foreign matter is deposited between the stagnation ring 32 and the inside of the valve body 1, the case can be eliminated by adjusting the angle of the stagnation ring 32. Object, to achieve the purpose of sealing. However, the structure of the prior art is such that the stagnation ring 32' cannot be rotated because it must be accurately positioned.

Further, the stagnation ring 32' must be angled to be compatible with each other according to the angle thereof, and when the stagnation ring 32' is rotated once, when the angle is not engaged, there is a possibility of leakage. The stagnation ring 32 designed in this case has a slower curvature, so it can be easily manufactured by computer design in processing. Unlike the conventional technology, the stagnation ring cannot be applied to a computer design and must be manually manufactured, which is time consuming and costly.

The valve seat 30 is matched with the design of the three off-axis, and the inclination of the inner edge of the valve seat 30 must conform to the inclination of the eccentric cone, that is, as shown in the figure, the inner edge of the valve seat 30 has a gentle oblique And a steep slope below the inner edge of the valve seat 30; and the two slopes coincide with the slope of the eccentric cone. The slope of the entire inner edge changes continuously from top to bottom.

Due to the design of the eccentric cone described above, the annular stagnation ring 32 can be radially symmetric with respect to its axis. That is, the circular symmetrical structure, when the vent ring 32 is mounted on the outer edge of the valve body 1 to support the valve seat 30, the edge of the stagnation ring 32 can be closely attached to the valve seat 30 at different positions thereof. The inner edge forms a completely sealed form. Since the stagnation ring 32 is radially symmetrical with respect to its axial center, it is relatively simple to manufacture, and there is no directional problem during installation. The stagnation ring 32 can be oriented in either direction. Directly into the valve body 1. Immediately when the stagnation ring 32 slides, the purpose of sealing can still be achieved.

In addition, another feature of the present invention is that an annular band-shaped region of the inner circumferential surface of the valve seat 30 is shaped to be scanned by the outermost edge of the stagnation ring 32 (as shown in FIG. 7A). The track surface a, that is, when the valve stem 2 rotates to drive the stagnation ring 32, the outermost edge of the stagnation ring 32 just cuts through the annular band region, that is, when the stagnation ring 32 is cut The valve seat 30 is not subjected to a positive force and therefore does not push the valve seat 30. This design contributes to an excellent seal when the vent ring 32 contacts the valve seat 30.

When the valve stem 2 rotates, the stagnation ring 32 will rotate with the radial direction of the valve stem 2 as a rotation axis, so the trajectory of the outer edge of the stagnation ring 32 at different positions will change due to different rotation radii. Therefore, the inner edge surface of the valve seat 30 of this case will be continuously changed according to different points on the stagnation ring 32 to fit the trajectory a of the stagnation ring 32 as a whole.

The above design of the case can produce the following two advantages:

(1) When the valve stem 2 is actuated and the valve member 31 is rotated, the outer edge of the stagnation ring 32 will cut through the valve seat in a tangential direction, so there is only a frictional force between the two without a positive force, and The valve seat 30 is crushed and pushed (the damage of the valve seat 30 and the displacement of the valve body 1 may occur for a long time). As shown in FIG. 7B, when a foreign matter is stuck on the valve seat 30, since the stagnation ring 32 travels in the tangential direction, the foreign matter is not applied to the force pressed against the valve seat 30, but is tangentially Directions remove foreign matter from the entire valve.

In contrast, as shown in FIG. 7C, it is an action diagram of a three-way valve structure of the prior art, in which the torus is not symmetrical except for the stagnation ring 32', and the torus is straight outside the bottom surface, so When the valve member 31' is rotated, a frictional force and a positive force are generated on the valve seat 30', and the foreign matter is pressed against the valve seat 30'. Therefore, foreign matter cannot be excluded. After a long time, not only foreign matter will get stuck on the valve seat 30' but will damage the valve body.

(2) As shown in FIG. 10, since the stagnation ring 32 is completely symmetrical, even if there is a slight gap between the stagnation ring 32 and the valve seat 30, the stagnation ring 32 can be rotated at an angle. To get a better stop point. Since the stagnation ring 32 is completely symmetrical, there is no alignment problem at the time of installation.

However, in the prior art, since the stagnation ring 32' is asymmetrical, it must be accurately aligned during installation and cannot be rotated after installation. If the stagnation ring 32' is stuck by impurities or is slightly deformed, the new stagnation ring 32' must be replaced. It is quite inconvenient to operate and also increases the cost of use.

In summary, the humanized design of this case is quite in line with actual needs. The specific improvement of the existing defects is obviously a breakthrough improvement advantage compared with the prior art, and it has an improvement in efficacy and is not easy to achieve. The case has not been disclosed or disclosed in domestic and foreign literature and markets. Has been in compliance with the provisions of the patent law.

The detailed description above is a detailed description of one of the possible embodiments of the present invention, and the embodiment is not intended to limit the scope of the patents, and the equivalent implementations or modifications that are not included in the spirit of the present invention should be included in The patent scope of this case.

1‧‧‧ valve body

10‧‧‧Valves

2‧‧‧ valve stem

30‧‧‧ valve seat

31‧‧‧ Valves

310‧‧‧Axis hole

32‧‧‧Stop ring

33‧‧‧Water stop washer

34‧‧‧Seal

4‧‧‧ side cover

40‧‧‧ screws

5‧‧‧Outer cover

50‧‧‧ screws

Claims (5)

A valve valve structure in which a stagnation ring does not apply a positive force to a valve seat, comprising: a valve body (1) having a valve chamber (10); a valve seat (30) accommodating The valve seat (30) is slightly annular, and the valve seat (30) has a trapezoidal radial section; a valve member (31), the valve member is disposed in the valve chamber ( 10), the outer edge of the valve member (30) is abutted against the valve seat (30), and the axial direction of the valve member (31) is provided with a shaft hole (310) for allowing a valve stem (2) to penetrate Wherein, in order to control the opening and closing of the valve member (31), the opening and closing of the valve member (31) can regulate the flow through the fluid; a stagnation ring (32), the stagnation ring (32) is a symmetry The O-ring of the center of the circle, and the stagnation ring (32) has a convex arc shape along the radial outer ring surface, and is disposed on the outer side of the valve member (31) to abut against the valve seat (30). The venting ring (32) is radially symmetrical about an axis passing through the center of the stagnation ring (32); wherein an annular band-shaped region of the inner edge annulus of the valve seat (30) is shaped to equate the sling ring (32) The track surface swept out by the outermost edge of the motion track, that is, an annular portion of the shape of the track surface is equal to the inside of the valve seat (30) The shape of an annular band-shaped region of the torus, when the valve stem (2) is actuated to rotate the valve member (31), the outer edge of the stagnation ring (32) will cut through the valve seat in a tangential direction ( 30), so there is only a frictional force between the two, there is no positive force, when there is a foreign matter stuck in the valve seat (30), because the stagnation ring (32) discharges the foreign matter in the tangential direction through the entire valve; The ring (32) is completely symmetrical, even because of the stagnation ring (32) and the valve seat (30) When there is a slight gap between them and the leak cannot be completely stopped, the stagnation ring (32) can be rotated at an angle to obtain a better stop point; since the stagnation ring (32) is completely symmetrical, there is no pair at the time of installation. The problem of the position; wherein the stagnation ring (32) is completely symmetrical, so there is no problem of alignment during installation; in addition, when there is impurity jam or micro-deformation, the stagnation ring (32) can also be transferred. Eliminate this situation. For example, the vent ring of claim 2 does not apply a positive force to the valve seat structure, wherein the gate valve structure is a three-eccentric gate valve structure, that is, the valve member (31) forms an asymmetrical Conical shape, wherein the two extension lines (R, R') formed by the side edges of the upper and lower sides are asymmetrical, and the slope of the extension line (R) of the upper side edge with respect to the center line of the valve member (31) (absolute value) Is greater than the slope of the lower side edge extension line (R') with respect to the center line of the valve member (31) (absolute value), and extends the two oblique lines (R, R') to the left to form an intersection (I Wherein the distance between the intersection (I) and the centerline (Q') of the valve body (1) is not greater than the radius of the valve member. For example, the vent ring of claim 3 does not apply a positive force to the valve seat structure, wherein the central portion of the valve member (31) protrudes from a ring, and a groove is provided near the outer edge (313). A water stop washer (33) is located in the recess (313) of the valve member (31) and between the valve member (31) and the stagnation ring (32). The damper ring of claim 3 does not apply a positive force to the valve seat structure, wherein the valve member (31) deviates from the valve body along the axial axis (P) of the radial direction of the shaft (1) the center line (P') formed by the lower ends of the cross section, so that There is a distance (A) between the axis line (P) and the center line (P') to form an eccentricity; and the axial center line (Q) of the valve member (31) deviates from the valve body (1) The center line (Q') has a gap (B) between the axial center line (Q) and the center line (Q') of the valve body, so that another eccentricity is formed. For example, the vent ring of claim 3 does not apply a positive force to the valve seat structure, wherein the stagnation ring (32) is a ring composed of a rubber ring or graphite or PTEF material. The top of the ring (32) abuts against the valve seat (30), and the stagnation ring (32) can contact any point of the valve seat to evenly distribute the force.