CN218267350U

CN218267350U - Forced sealing ball valve

Info

Publication number: CN218267350U
Application number: CN202222737282.6U
Authority: CN
Inventors: 钱彦霖; 林兴良
Original assignee: Sichuan Keycon Kcon Valve Manufacturing Co ltd
Current assignee: Sichuan Keycon Kcon Valve Manufacturing Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-01-10
Anticipated expiration: 2032-10-18

Abstract

The utility model relates to a forced seal ball valve belongs to ball valve technical field. The spiral slideway in the utility model is composed of a plurality of sections of oblique cutting grooves, the outer surface of the guide end of the first guide pin is provided with a plurality of groups of guide planes, each section of oblique cutting groove respectively corresponds to one group of guide planes and forms surface contact type guide matching, and the lifting slideways at the two ends respectively correspond to one group of guide planes and forms surface contact type guide matching; the second guide pin is provided with a first guide plane and a second guide plane, the first guide plane and the straight guide section at the lower end of the valve rod form surface contact type guide fit, and the second guide plane and the inclined guide section at the lower end of the valve rod form surface contact type guide fit. The utility model provides a first uide pin and second uide pin all adopt the face-to-face contact transmission, and the local stress that produces when having reduced the transmission avoids appearing the strain phenomenon, has improved drive mechanism's life.

Description

Forced sealing ball valve

Technical Field

The utility model relates to a forced seal ball valve belongs to ball valve technical field.

Background

The ball valve is mainly applied to petroleum, chemical industry, steel, each field such as metallurgy and electric power, traditional ball valve includes the valve body, be equipped with inflow passageway and outflow passageway on the valve body, be equipped with the valve pocket between inflow passageway and the outflow passageway, be provided with the spheroid in the valve pocket, be equipped with the disk seat between spheroid and the outflow passageway, the spheroid upper end is connected with the valve rod that is used for rotating the spheroid, so traditional ball valve drives opening and closing that the spheroid realized the ball valve through the valve rod, the ball valve contacts with the sealed face of disk seat always opening and closing the in-process spheroid, spheroid and the sealed face wearing and tearing of disk seat are all very serious, the sealed face that uses spheroid and disk seat for a long time just can not reach sealed effect, because there is frictional force between spheroid and the disk seat, so the ball valve all needs the moment of torsion great at the in-process of opening and closing.

To the deficiency that prior art exists, the patent document with publication number CN203309176U provides a track type ball valve sealed firmly, including the valve body, be equipped with inflow channel and outflow passageway on the valve body, be equipped with the valve pocket between inflow channel and the outflow passageway, be provided with the spheroid in the valve pocket, be equipped with the disk seat between spheroid and the outflow passageway, the spheroid upper end is connected with the valve rod that is used for rotating the spheroid, be provided with the direction slide on the valve rod, the direction slide includes spiral slideway and lift slide, the lift slide sets up in spiral slideway's upper end and communicates with spiral slideway, the valve body on be provided with the uide pin, uide pin one end extends to in the direction slide, the valve rod is close to the spheroid end and sets up to the inclined plane, inclined plane upper end inclines to the disk seat direction, the inclined plane lower extreme is equipped with the flat face, be provided with the round pin axle on the spheroid to set up in the inclined plane both sides, through above-mentioned technical scheme, the ball valve sealed face does not have the friction when opening and closing, long service life, and the operating torque is low. However, in this scheme, the uide pin that sets up on the valve body, the round pin axle that sets up on the spheroid all is conventional cylindric lock structure, it is not smooth and easy just to appear the valve switch after using a period when the valve, then the card is dead seriously, lead to the valve can't open fully or close entirely, its reason all appears on cylindric lock transmission joint, the leading cause lies in that cylindric pin and guide slideway are line contact, line-surface contact can produce very big contact stress, long-time friction can lead to cylindric pin and guide slideway to appear pulling, in case the pulling phenomenon appears and inevitably can lead to the valve card to die, the valve will unable normal switch, cause the valve to leak, only change whole drive mechanism this moment, very big manpower and financial resources have been wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that: the forced sealing ball valve with a more reliable transmission structure is provided.

For solving the technical problem the utility model discloses the technical scheme who adopts is: the forced sealing ball valve comprises a valve body, wherein an inflow channel and an outflow channel are arranged on the valve body, a valve cavity is arranged between the inflow channel and the outflow channel, a ball is arranged in the valve cavity, a valve seat is arranged between the ball and the outflow channel, the upper end of the ball is connected with a valve rod used for rotating the ball, a guide slide way is arranged on the valve rod and comprises a spiral slide way and lifting slide ways positioned at two ends of the spiral slide way, a first guide pin is arranged on the valve body, one end of the first guide pin extends into the guide slide way, an inclined guide section is arranged at one end, close to the ball, of the valve rod, the upper end of the inclined guide section inclines towards the direction close to the valve seat, a straight guide section is connected at the lower end of the inclined guide section, a second guide pin is arranged on the ball and arranged at two sides of the valve rod and can form guide fit with an inclined plane on the inclined guide section, the spiral slide way is formed by a plurality of inclined grooves, each inclined guide end of the first guide pin is provided with a plurality of guide planes, each inclined groove corresponds to one guide plane and forms guide fit with guide plane in a face contact type, and the lifting slide ways at two ends correspond to one group of guide planes respectively and form face contact type guide fit in a face contact type; the second guide pin is provided with a first guide plane and a second guide plane, the first guide plane and the straight guide section form surface contact type guide fit, and the second guide plane and the inclined guide section form surface contact type guide fit.

In order to ensure that the transmission structure is more reliable, a group of third guide pins are arranged on the ball body, and the third guide pins and the second guide pins are enclosed to form a guide cavity with a rectangular cross section.

In order to make the transmission structure more reliable, the first guide plane of one of the second guide pins is located above the second guide plane, and the first guide plane of the other of the second guide pins is located below the second guide plane.

For the assembly of being convenient for, be provided with the valve gap on the valve body, first uide pin is installed on the valve gap, and for making transmission structure more reliable, the direction slide symmetry is provided with two, and every direction slide corresponds respectively and is provided with first uide pin.

For making the driving face more wear-resisting, the surface of the straight guide section's on the surface of first uide pin, the surface of the guide slide inner wall on the second uide pin, the valve rod on the valve rod and the valve rod surface all is provided with the surface hardening treatment layer.

In order to make the transmission structure more reliable, the lower end of the ball body is provided with a convex column, the central line of the convex column and the central line of the valve rod are on the same straight line, the other end face of the convex column, which is opposite to the ball body, is provided with a spherical surface, and the spherical surface is contacted with the valve cavity.

The beneficial effects of the utility model are that: the first guide pin and the second guide pin are in surface-to-surface contact transmission, so that the local stress generated during transmission is reduced, the strain phenomenon is avoided, and the service life of the transmission mechanism is prolonged. After the third guide pin is additionally arranged, the third guide pin and the second guide pin are enclosed to form a guide cavity with a rectangular cross section, so that the valve rod can be guided on four sides, and the guide is more accurate. The first guide planes and the second guide planes of the two second guide pins are arranged in a staggered mode, and a better guide effect can be achieved. The surface of the transmission part is hardened, the surface hardness can reach more than HRC60, the wear resistance of the transmission part is greatly improved, and the service life of the valve is effectively ensured. The convex column at the lower end of the ball body adopts spherical surface contact, so that the friction force can be reduced during rotation, and meanwhile, the sealing effect is also realized, so that the arrangement structure is simple, the design is reasonable, and the processing is convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a part a of fig. 1.

Fig. 3 is a schematic view of the arrangement structure of the guide surface of the first guide pin of the present invention.

Fig. 4 is a schematic perspective view of the first guide pin of the present invention.

Fig. 5 is a schematic guiding diagram of the first guiding pin of the present invention during operation.

Fig. 6 is a schematic view of the arrangement structure of the guide surface of the second guide pin of the present invention. .

Fig. 7 is a schematic view of the combined structure of the valve rod and the ball body of the present invention.

Fig. 8 isbase:Sub>A schematic sectional view taken along linebase:Sub>A-base:Sub>A in fig. 7.

Parts in the figures are labeled: the valve comprises a valve body 1, a valve cover 2, a ball body 3, a second guide pin 4, a first guide plane 41, a second guide plane 42, a valve seat 5, a valve rod 6, a guide slideway 61, an inclined plane guide section 62, a straight guide section 63, a first guide pin 7, a third guide plane 71, a fourth guide plane 72, a fifth guide plane 73, a sixth guide plane 74, a third guide pin 8, a sealing component 9 and a support 10.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

As shown in fig. 1 to 8, the present invention comprises a valve body 1, an inflow channel and an outflow channel are provided on the valve body 1, a valve cavity is provided between the inflow channel and the outflow channel, a ball 3 is provided in the valve cavity, a valve seat 5 is provided between the ball 3 and the outflow channel, the upper end of the ball 3 is connected with a valve rod 6 for rotating the ball 3, a guide slide 61 is provided on the valve rod 6, the guide slide 61 comprises a spiral slide and a lifting slide at two ends of the spiral slide, a first guide pin 7 is provided on the valve body 1, one end of the first guide pin 7 extends into the guide slide 61, an inclined guide section 62 is provided at one end of the valve rod 6 close to the ball 2, the upper end of the inclined plane guide section 62 inclines towards the direction close to the valve seat 5, the lower end of the inclined plane guide section 62 is connected with a straight guide section 63, a second guide pin 4 is arranged on the ball body 3, the second guide pin 4 is arranged on two sides of the valve rod 6 and can form guide fit with the inclined plane on the inclined plane guide section 62, the spiral slideway is formed by a plurality of sections of inclined cutting grooves, the outer surface of the guide end of the first guide pin 7 is provided with a plurality of groups of guide planes, each section of inclined cutting groove respectively corresponds to one group of guide planes and forms surface contact type guide fit, and the lifting slideways at two ends respectively correspond to one group of guide planes and form surface contact type guide fit; the second guide pin 4 has a first guide flat 41 and a second guide flat 42, the first guide flat 41 and the straight guide section 63 forming a surface contact type guide engagement, and the second guide flat 42 and the inclined guide section 62 forming a surface contact type guide engagement. The inclined guide section 62 and the straight guide section 63 both use the axis of the valve rod 6 as a reference, the inclined guide section 62 has a guide inclined plane which is obliquely arranged relative to the axis of the valve rod 6, the straight guide section 63 is coaxial with the valve rod 6, and the straight guide section 63 generally adopts a rectangular cross section. In order to facilitate assembly, the valve body 1 is generally designed with the valve cap 2, the first guide pin 7 is generally installed on the valve cap 2, and in order to ensure reliable guiding, two guide slideways 61 are generally symmetrically arranged. Each guide slideway 61 is designed to correspond to the first guide pin 7. The number of the guide planes of the first guide pin 7 is set according to the number of the segments of the chamfered groove, and in the embodiment, the chamfered groove is divided into two segments, so that four sets of guide planes are provided in total. As shown in fig. 3, the third guide plane 71 and the sixth guide plane 74 are used for controlling the up-and-down motion of the valve rod 6, and the fourth guide plane 72 and the fifth guide plane 73 are used for controlling the rotation motion of the valve rod 6. The first guide pin 7 can be obtained by machining a common cylindrical pin, and a plurality of guide planes are machined on the outer circular surface of the cylindrical pin. In the embodiment, the first guide pin 7 adopts a symmetrical four-section surface guide design and forms surface-to-surface contact with the guide slideway 61 of the valve rod 6, so that the problem of overlarge local stress of a contact point of the first guide pin 7 and the valve rod 6 when the valve acts can be effectively solved; too large contact stress can also cause the pulling of the spiral groove or the guide pin, and the jamming of the valve; the size precision of the first guide pin 7 and the guide slide way 61 of the valve rod 6 is preferably 0.1mm, the motion track of the valve rod 6 is accurately limited, the up-down movement and the rotation of the valve rod 6 can be accurately controlled, the looseness of a transmission mechanism of the valve in any switching state can be avoided, and the damage of the transmission mechanism caused by pipeline vibration is effectively avoided.

The working principle of the utility model is as follows: when the driver drives the nut to rotate clockwise around the valve rod 6, the guide slideway 61 on the valve rod 6 realizes descending → rotation → descending action of the valve rod 6 under the guide action of the first guide pin 7, and the lower end of the valve rod 6 realizes full opening → partial closing → full closing under the limit of the second guide pin 4; conversely, when the driver drives the nut to rotate around the valve rod 6 anticlockwise, the guide slideway 61 on the valve rod 6 realizes lifting → rotation → lifting action of the valve rod 6 under the guide action of the first guide pin 7, and the lower end of the valve rod 6 realizes full closing → partial opening → full opening under the restriction of the second guide pin 4.

Wherein, the inclined plane direction section 62 that sets up can realize that valve rod 6 drives spheroid 3 and pastes tightly or break away from disk seat 5 for the ball valve sealed face does not have the friction when opening and closing, long service life, and operating torque is low.

Preferably, as shown in fig. 7 and 8, a set of third guide pins 8 is arranged on the ball 3, and the third guide pins 8 and the second guide pins 4 enclose a guide cavity with a rectangular cross section, so that the valve rod 6 can be guided on four sides, and the guidance is more accurate. The third guide pin 8 may be a cylindrical pin.

Preferably, as shown in fig. 6, the first guide plane 41 of one of the second guide pins 4 is located above the second guide plane 42, and the first guide plane 41 of the other second guide pin 4 is located below the second guide plane 42, so as to achieve better guiding effect. The first guiding plane 41 is a vertical plane and is used for controlling the opening and closing actions of the ball 3, and the second guiding plane 42 is obliquely arranged and is used for controlling the ball 3 to cling to and separate from the valve seat 5.

Preferably, the outer surface of the first guide pin 7, the outer surface of the second guide pin 4, the inner wall of the guide slide 61 on the valve rod 6, the outer surface of the inclined guide section 62 on the valve rod 6, and the outer surface of the straight guide section 63 on the valve rod 6 are provided with a surface hardening treatment layer. The surface of the transmission part is hardened, the surface hardness can reach more than HRC60, the wear resistance of the transmission part is greatly improved, and the service life of the valve is effectively ensured.

Preferably, the lower end of the sphere 3 is provided with a convex column, the central line of the convex column and the central line of the valve rod 6 are on the same straight line, the other end face of the convex column relative to the sphere 3 is provided with a spherical surface, and the spherical surface is contacted with the valve cavity. The convex column at the lower end of the ball body 3 is in spherical contact, so that the friction force can be reduced during rotation, and meanwhile, the sealing effect is achieved, and the ball body is simple in structure, reasonable in design and convenient to process.

Claims

1. Force sealed ball valve, including valve body (1), be equipped with inflow channel and outflow passageway on valve body (1), be equipped with the valve pocket between inflow channel and the outflow passageway, be provided with spheroid (3) in the valve pocket, be equipped with disk seat (5) between spheroid (3) and the outflow passageway, spheroid (3) upper end is connected with valve rod (6) that are used for rotating spheroid (3), be provided with direction slide (61) on valve rod (6), direction slide (61) include spiral slide and be located the lift slide at spiral slide both ends, be provided with first uide pin (7) on valve body (1), first uide pin (7) one end extends to in direction slide (61), valve rod (6) are close to spheroid (3) one end and are provided with inclined plane direction section (62), inclined plane direction section (62) upper end is to being close to disk seat (5) direction slope, inclined plane direction section (62) lower extreme is connected with straight direction section (63), be provided with second uide pin (4) on spheroid (3), second uide pin (4) set up in valve rod (6) both sides, and can form the cooperation with the inclined plane on the direction section (62), its characterized in that: the spiral slideway is composed of a plurality of sections of inclined cutting grooves, the outer surface of the guide end of the first guide pin (7) is provided with a plurality of groups of guide planes, each section of inclined cutting groove respectively corresponds to one group of guide planes and forms surface contact type guide fit, and the lifting slideways at two ends respectively correspond to one group of guide planes and form surface contact type guide fit; the second guide pin (4) has a first guide plane (41) and a second guide plane (42), the first guide plane (41) and the straight guide section (63) form a surface contact type guide fit, and the second guide plane (42) and the inclined guide section (62) form a surface contact type guide fit.

2. A positive seal ball valve as defined in claim 1, wherein: a group of third guide pins (8) are arranged on the ball body (3), and the third guide pins (8) and the second guide pins (4) are enclosed to form a guide cavity with a rectangular cross section.

3. A positive seal ball valve as defined in claim 1, wherein: the first guide plane (41) of one of the second guide pins (4) is located above the second guide plane (42), and the first guide plane (41) of the other second guide pin (4) is located below the second guide plane (42).

4. A positive seal ball valve as defined in claim 1, wherein: be provided with valve gap (2) on valve body (1), first uide pin (7) are installed on valve gap (2), and direction slide (61) symmetry is provided with two, and every direction slide (61) corresponds respectively and is provided with first uide pin (7).

5. A positive seal ball valve as defined in claim 1, wherein: the outer surface of the first guide pin (7), the outer surface of the second guide pin (4), the inner wall of a guide slideway (61) on the valve rod (6), the outer surface of an inclined guide section (62) on the valve rod (6) and the outer surface of a straight guide section (63) on the valve rod (6) are all provided with surface hardening treatment layers.

6. A positive seal ball valve as claimed in any one of claims 1 to 5, wherein: the lower end of the ball body (3) is provided with a convex column, the central line of the convex column and the central line of the valve rod (6) are on the same straight line, the other end face of the convex column, which is opposite to the ball body (3), is provided with a spherical surface, and the spherical surface is contacted with the valve cavity.