CN213512204U

CN213512204U - Lifting rod type track ball valve

Info

Publication number: CN213512204U
Application number: CN202022452746.XU
Authority: CN
Inventors: 李东涛; 毛思蓉; 梁震; 李红光
Original assignee: Taicang Union Tech Precision Machinery Co ltd
Current assignee: Taicang Union Tech Precision Machinery Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-06-22
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a lifting rod formula track ball valve, including the valve rod casing, set up the valve body of through-hole, valve ball, valve rod and disk seat, the valve rod casing sets up on the valve body, and can dismantle with the valve body is sealed to be connected, and the valve rod casing takes off the back from the valve body, and the valve body upper end is provided with the opening that allows the valve ball to pass through, and the disk seat is installed in the through-hole of valve body and is located the intraoral one end of opening, and has the clearance between disk seat and the valve body, utilizes the valve rod control valve ball to advance and open and the through-hole of. The floating tracking valve seat compensates machining errors and assembly errors, and the valve seat automatically searches for the center of the ball body. The valve body is provided with a clamp spring groove which can fix the valve seat and is easy to detach. The valve seat is not the traditional cold pressing assembly mode, and the clamp spring is adopted to fix the valve seat, so that the valve seat can be conveniently taken out on line, and the replacement and maintenance are convenient. The pivot at the bottom of the sphere is subjected to HVOF supersonic flame spraying hardening treatment, so that the pivot worn by impurities in the pipeline is reduced.

Description

Lifting rod type track ball valve

Technical Field

The utility model relates to a valve field, in particular to lifting rod formula track ball valve.

Background

The Z4 lifting rod type hard sealing track ball valve has the characteristics of no friction of switch, forced sealing, zero inner leakage, frequent switching, cyclic temperature change resistance, long service life and the like due to the unique structural design, and is widely applied to the fields of hydrocracking cut-off isolation, molecular sieve program control frequent switching and natural gas station metering. Traditional track ball valve, online change procedure is loaded down with trivial details, and valve rod department is easy to be cracked.

SUMMERY OF THE UTILITY MODEL

In view of the defects existing in the prior art, the main object of the present invention is to overcome the disadvantages of the prior art, and to disclose a lift rod type track ball valve, which comprises a valve rod housing, a valve body provided with a through hole, a valve ball, a valve rod and a valve seat, wherein the valve rod housing is arranged on the valve body and detachably connected with the valve body in a sealing manner, after the valve rod housing is taken down from the valve body, the upper end of the valve body is provided with an opening allowing the valve ball to pass through, the valve seat is arranged at one end of the valve body, the through hole is located at the opening, a gap is arranged between the valve seat and the valve body, and the valve rod is used to control the valve ball to rotate relative to the valve body to open and close the through; when the through hole of the valve body is closed, the valve ball is tightly attached to the valve body through the valve seat.

Furthermore, a clamp spring groove is formed in the through hole of the valve body, a clamp spring is installed in the clamp spring groove, and the valve seat is installed in the through hole of the valve body through the clamp spring.

Furthermore, the valve ball extends downwards to form a pivot, a mounting groove is concavely formed in a corresponding position in the valve body, and a pivot bushing matched with the pivot is arranged in the mounting groove.

Further, still include valve rod bush and thrust ripples spring, the valve rod bush set up in the valve rod casing, the valve rod bush pass through the thrust ripples spring with the valve ball is connected.

Further, the valve rod includes first valve rod and second valve rod from top to bottom, set up continuous first track groove and second track groove on the lateral wall of second valve rod, first track groove is on a parallel with the axial of valve rod, second track groove spiral setting, set up the pilot pin on the valve rod casing, and the one end of pilot pin extends to first track groove with in the second track inslot.

Further, still include left ball round pin and right ball round pin, the lower extreme of second valve rod is the flat structure, left ball round pin with right ball round pin parallel arrangement is in the top of valve ball, and respectively with the left side and the right side contact of second valve rod.

Further, the second valve stem is provided downward with an inclined portion and a vertical portion, the inclined portion pushing the valve ball to move rightward when the through hole of the valve body is closed; when the through hole of the valve body is opened, the vertical portion is in contact with the valve ball.

Further, still include the hand wheel, the hand wheel rotates to be set up on the valve stem casing, and with valve stem thread fit.

Further, the pivot surface is treated by an HVOF supersonic flame spraying technique.

Further, the valve ball and the valve seat surface are treated by an HVOF supersonic flame spraying technique.

The utility model discloses the beneficial effect who gains:

(1) the floating tracking valve seat compensates machining errors and assembly errors, and the valve seat automatically searches for the center of the ball body.

(2) The valve body is provided with a clamp spring groove which can fix the valve seat and is easy to detach.

(3) The valve seat is not the traditional cold pressing assembly mode, and the clamp spring is adopted to fix the valve seat, so that the valve seat can be conveniently taken out on line, and the replacement and maintenance are convenient.

(4) The pivot at the bottom of the sphere is subjected to HVOF supersonic flame spraying hardening treatment, so that the pivot worn by impurities in the pipeline is reduced.

Drawings

Fig. 1 is a schematic structural view of a lifting track ball valve of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is an enlarged view of B in FIG. 1;

the reference numbers are as follows:

1. valve stem housing, 2, valve body, 3, valve ball, 4, valve stem, 5, valve seat, 6, snap spring, 7, hand wheel, 11, valve stem bushing, 12, thrust wave spring, 13, guide pin, 21, opening, 22, snap spring groove, 23, pivot bushing, 31, pivot, 32, left ball pin, 33, right ball pin, 41, first valve stem, 42, second valve stem, 43, first track groove, 44, second track groove, 421, inclined portion, 422, vertical portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

A lifting rod type track ball valve is shown in figures 1-3 and comprises a valve rod shell 1, a valve body 2 provided with a through hole, a valve ball 3, a valve rod 4 and a valve seat 5, wherein the valve rod shell 1 is arranged on the valve body 2 through a gland bolt and a gland nut and is connected with the valve body 2 in a sealing and detachable mode so as to facilitate the subsequent quick assembly and disassembly of the valve rod shell 1. After the valve rod shell 1 is taken down from the valve body 2, the upper end of the valve body 2 is provided with an opening 21 allowing a valve ball to pass through, the valve seat 5 is installed at one end, located in the opening 21, of the through hole of the valve body 2, a gap is reserved between the valve seat 5 and the valve body 2, when the valve ball 3 is closed, the valve ball 3 is pressed downwards to incline, the valve seat 5 can automatically position along the center of the valve ball 3 after the valve ball inclines, the joint sealing of the sealing surface of the valve seat 5 and the sealing surface of the valve ball 3 is achieved, and errors in machining or installation are automatically compensated. When in use, the valve ball 3 is controlled by the valve rod 4 to rotate relative to the valve body 2 so as to open and close the through hole of the valve body 2; when the through hole of the valve body 2 is closed, the valve ball 3 is closely attached to the valve body 2 through the valve seat 5.

In one embodiment, as shown in fig. 1-3, a clamp spring groove 22 is provided in the through hole of the valve body 2, the clamp spring 6 is installed in the clamp spring groove 22, and the clamp spring 6 is used to install the valve seat 5 in the through hole of the valve body 2. When the valve seat 5 is required to be replaced, the clamp spring 6 can be detached on line, the valve seat 5 can be directly taken out for replacement, no special tool is needed, and the valve seat is simple to maintain and easy to operate. In addition, the valve seat 5 is not assembled in a traditional cold pressing mode, and the valve seat 5 is fixed by the clamp spring 6, so that the valve seat is convenient to take on line and replace and maintain.

In one embodiment, as shown in fig. 1-3, the ball 3 extends downward to form a pivot 31, and a corresponding recess is formed in the valve body 2 to receive a pivot bushing 23 that engages the pivot 31. So that the pivot 31 rubs against the bush 23 to reduce the wear of the valve body 2 to increase its service life.

In one embodiment, as shown in fig. 1-3, the valve stem bushing 11 and the thrust wave spring 12 are further included, and the valve stem bushing 11 is arranged in the valve stem housing 1 to reduce the abrasion of the valve stem 4 and the inner wall of the valve stem housing 1; the lower surface of the stem bush 11 is connected to the valve ball 5 via a thrust wave spring 12. The ball 3 is prevented from shaking in the valve body 2 by the thrust wave spring 12 applying a downward thrust to the ball 3.

In one embodiment, as shown in fig. 1 to 3, the valve rod 4 includes a first valve rod 41 and a second valve rod 42 from top to bottom, a side wall of the second valve rod 42 is provided with a first track groove 43 and a second track groove 44 which are connected, the first track groove 43 is parallel to the axial direction of the valve rod 4, the second track groove 44 is spirally arranged (circumferentially arranged), the valve rod housing 1 is provided with the guide pin 13, and one end of the guide pin 13 extends into the first track groove 43 and the second track groove 44. The lower end of the second stem 42 is flat and includes an inclined portion 421 and a vertical portion 422, and when the through hole of the valve body 2 is closed, the inclined portion 421 pushes the valve ball 3 to move rightward; when the through hole of the valve body 2 is opened, the vertical portion 422 is in contact with the valve ball 3. In a preferred embodiment, a left ball pin 32 and a right ball pin 33 are further included, and the left ball pin 32 and the right ball pin 33 are disposed in parallel above the valve ball 3 and are in contact with the left side and the right side of the second valve stem 42, respectively. The valve rod 4 is lifted upwards, the valve ball 3 moves to one side by the inclined part 421 to be separated from the valve seat 5 through the matching of the guide pin 13 and the first track groove 43, and then the valve ball 3 is driven to rotate through the second valve rod 42 along the guide of the second track groove 44, so that the frictionless rotation is realized between the valve ball and the valve seat 5. In addition, the left ball pin 32 and the right ball pin 33 are arranged, so that the processing of the cavity in the valve ball 3 is facilitated, and after the valve ball is used for a long time, the left ball pin 32 and the right ball pin 33 are abraded, the abrasion of the valve ball 3 is avoided, and the cost is reduced. In another preferred embodiment, the first track grooves 43 and the second track grooves 44 are provided in two sets and symmetrically disposed at both sides of the second valve rod 42, so that the valve rod 4 is more stable during the lifting process, the stress of the guide pin to the track grooves is dispersed, and the service life of the valve rod 4 is greatly prolonged.

In one embodiment, as shown in fig. 1-3, the valve stem housing further comprises a hand wheel 7, wherein the hand wheel 7 is rotatably arranged on the valve stem housing 1 and is in threaded fit with the valve stem 4. Through rotating hand wheel 7, drive valve rod 4 and shift up, because be provided with first track groove 43 and second track groove 44 on the second valve rod 42 of valve rod 4, under the effect of pilot pin 13, whole valve rod 4 shifts up perpendicularly earlier, rotatory moving up afterwards, when shifting up perpendicularly, slope 421 of second valve rod 42 lower extreme contact left ball round pin 32 earlier, give valve ball 3 power to the left, make valve ball 3 leave disk seat 5, when rotatory moving up, drive valve ball 3 and rotate and make the perpendicular portion 422 and the right ball round pin 33 contact of second valve rod 42 lower extreme, make ball valve 3 open completely, realize between valve ball 3 and the disk seat 5 frictionless ground rotation, the moment of torsion is little, and convenient operation. When the ball valve is closed: when the hand wheel 7 is rotated in the opposite direction, the valve rod 4 falls down to drive the valve ball 3 to rotate, and the sealing surface of the valve ball 3 rotates to the valve seat 5, the second valve rod 42 moves vertically downwards due to the action of the first track groove 43 and the second track groove 44, the inclined part 421 at the lower end of the second valve rod 42 contacts the right ball pin 33 first, a rightward force is applied to the valve ball 3, and the sealing surface of the valve ball 3 is in close contact with the valve seat 5, so that the closing effect is achieved.

In one embodiment, the surface of the pintle 31 is treated by an HVOF supersonic flame spray technique. The coating improves the surface hardness of the original base material to HRC65, and the hardness is far higher than that of the traditional stellite surfacing, so that the pivot 31 can be more wear-resistant and corrosion-resistant, and particles are prevented from entering the position of the pivot to block a sphere.

In one embodiment, the surfaces of the valve ball 3 and valve seat 5 are treated by an HVOF supersonic flame spray technique. The hardness of the sealing surface is improved, and the service life of the bead weld is longer than that of the traditional stellite bead weld.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims

1. A lifting rod type track ball valve is characterized by comprising a valve rod shell, a valve body, a valve ball, a valve rod and a valve seat, wherein the valve rod shell is provided with a through hole, the valve body, the valve ball, the valve rod and the valve seat are arranged on the valve body and are in sealing detachable connection with the valve body, after the valve rod shell is taken down from the valve body, an opening allowing the valve ball to pass through is arranged at the upper end of the valve body, the valve seat is arranged at one end, located in the opening, of the through hole of the valve body, a gap is formed between the valve seat and the valve body, and the valve rod is used for controlling the valve ball to rotate relative to the valve body so; when the through hole of the valve body is closed, the valve ball is tightly attached to the valve body through the valve seat.

2. A poppet-type orbiting ball valve as claimed in claim 1 wherein a snap spring groove is provided in the through hole of the valve body, a snap spring is mounted in the snap spring groove, and the valve seat is mounted in the through hole of the valve body by the snap spring.

3. A poppet-type orbital ball valve as set forth in claim 1 wherein said ball extends downwardly to provide a pivot axis and a corresponding recess is formed in said body to provide a mounting groove in which is disposed a pivot bushing for engaging said pivot axis.

4. The poppet-type orbital ball valve of claim 1 further comprising a stem bushing and a thrust wave spring, the stem bushing being disposed within the stem housing, the stem bushing being connected to the ball by the thrust wave spring.

5. The poppet-type track ball valve as defined in claim 1, wherein the valve stem comprises a first valve stem and a second valve stem from top to bottom, the second valve stem has a sidewall provided with a first track groove and a second track groove connected with each other, the first track groove is parallel to the axial direction of the valve stem, the second track groove is spirally disposed, the valve stem housing is provided with a guide pin, and one end of the guide pin extends into the first track groove and the second track groove.

6. The poppet-type orbiting ball valve as claimed in claim 5, further comprising a left ball pin and a right ball pin, wherein the lower end of the second valve stem is of a flat structure, and the left ball pin and the right ball pin are disposed in parallel above the valve ball and are in contact with the left side and the right side of the second valve stem, respectively.

7. The poppet-type orbital ball valve of claim 5 wherein said second valve stem has an inclined portion and a vertical portion disposed downwardly, said inclined portion urging said ball to move to the right when said through-bore of said valve body is closed; when the through hole of the valve body is opened, the vertical portion is in contact with the valve ball.

8. A poppet-type orbital ball valve as set forth in claim 1 further comprising a hand wheel rotatably disposed on said valve stem housing and threadably engaged with said valve stem.

9. A poppet-type orbital ball valve as claimed in claim 3 wherein said pivot surface is treated by an HVOF supersonic flame spray technique.

10. A poppet-type orbiting ball valve as claimed in claim 1, wherein said valve ball and said valve seat surface are treated by HVOF supersonic flame spraying technique.