CN2234026Y

CN2234026Y - Ball valve for industrial transportation pipe line

Info

Publication number: CN2234026Y
Application number: CN 95215906
Authority: CN
Inventors: 林声该; 包键; 朱江; 蔡钟焕
Original assignee: CHANGCHENG PUBLIC TRADE Co ZHEJIANG PROV
Current assignee: Changcheng Industry and Trade Co., Ltd., Zhejiang Prov.
Priority date: 1995-06-23
Filing date: 1995-06-23
Publication date: 1996-08-28
Anticipated expiration: 2005-06-23

Abstract

The utility model provides a ball valve for industrial transportation pipelines. The utility model is characterized in that the utility model is composed of a valve body, a valve cover, a valve core which is arranged in the valve body and a single valve seat which is matched with the valve core. The interior of the vertical through hole of the upper end of the valve core is provided with a rolling pin. The lower end of the valve rod is made into a rod head which is provided with a bevel and is inclined to one side. The rod head extends into the interior of the vertical through hole and is in movable fit with the rolling pin. The middle part of the valve rod is provided with a spiral guide groove. The spiral guide groove is matched with the screw of the neck part of the valve cover. The valve rod is connected with the stroke actuating mechanism of the valve rod. The ball valve of the utility model avoids the contact abrasion between the valve core and the valve seat, and has the advantages of flexible opening and closing and good sealing performance.

Description

A kind of industrial conveyance conduit ball valve

The utility model relates to the valve of control conveyance conduit inner fluid break-make, particularly a kind of industrial conveyance conduit ball valve.

The member that directly plays on-off action in the existing ball valve mainly comprises valve body, is embedded in the bivalve seat in the valve channel, the spool that is complementary with the bivalve seat.Described spool contacts in the process of switch frequently with the bivalve seat, owing to be subjected to the restriction of factors such as material, structure, temperature, cause easily between spool and the bivalve seat and rotates ineffective, wear and tear aggravation and sealing decline, finally causes the ball valve malfunctioning switch.In the background technique, the bivalve seat is changed into soft material such as high-quality plastics and makes by hard metal, because high-quality plastics has certain elasticity and intensity, can improve the flexibility of rotating between spool and the bivalve seat, slow down the degree of wear and raising sealing.But soft materials such as plastics are aging easily, it is special when the tube fluid temperature is lower than-40 ℃, soft materials such as plastics harden easily and become fragile, when the tube fluid temperature is higher than 180 ℃, then soft material such as plastics distortion of feeling like jelly, wearing and tearing aggravation this moment, sealing phenomenon destroyed, the ball valve malfunctioning switch are appeared again existing again, and therefore simple material change can not fundamentally solve the ineffective and wear problem of rotation between spool and the valve seat.

The purpose of this utility model is that a kind of improved industrial pipeline ball valve will be provided.This ball valve switch flexibly, minimum, good airproof performance weares and teares.

Task of the present utility model is finished as follows.

A kind of industrial conveyance conduit ball valve, comprise the valve body of being with the fluid passage, be located at the following lining of body cavity, the spool that band is logical, valve rod, be enclosed within the external bushing and the valve gap of described valve rod periphery, filler, the valve rod travel actuator that is connected with described valve rod, its characteristics are the form and following lining realization dynamic fit of the anchor plate surface of described spool lower end with curved surface, described spool is complementary with the single valve seat that is embedded in the valve body, described spool upper end is provided with vertical through holes, the perisporium of described vertical through holes is provided with roller bolt, horizontal through hole is axial consistent in the axial and spool of described roller bolt, the lower end of described valve rod makes the band inclined-plane and partially at bar head on one side, the bar head of described valve rod stretches in the vertical through holes of spool, makes the inclined-plane of described bar head be close to roller bolt formation movingly, described valve rod middle part is provided with helical guide groove, and described valve gap bottleneck position is provided with the screw that can be complementary with the helical guide groove motion.

The utility model industry conveyance conduit can be a sphere with the surface of ball valve core lower end anchor plate.

The utility model industry conveyance conduit is provided with withstand voltage circle with the single valve seating face of ball valve, the position that contacts with spool.

The utility model industry conveyance conduit can be 90 ° with the central angle in the relative valve rod of the horizontal projection axle center of ball valve helical guide groove.

When the utility model ball valve was closed, the bar head of valve rod goed deep in the vertical through holes of spool, and the upper end on valve club head inclined-plane is pressed roller bolt and the sphere of spool is close on the single valve seat, makes it to have good sealing.When ball valve was opened, valve rod travel actuator made valve rod up, and the helical guide groove at valve rod middle part and the screw at valve gap bottleneck position then force valve rod to produce rotation in up, and the angle of its rotation is controlled by the length and the pitch of helical guide groove.The bar head of valve rod end also rises with the motion of valve rod and rotates, glide with inclined-plane on the then relative bar head of roller bolt that bar head inclined-plane is close to and turn to simultaneously, because bar head secundly, therefore the motion of roller bolt can drive the spool disengaging and turn over 90 ° of angles easily to open position with contacting also of single valve seat, in this moment spool horizontal through hole axially and valve body fluid passage axial consistent, ball valve is open-minded, and the anchor plate of spool lower end and following bush structure help the rotation of spool.The utility model owing to disengage with the single valve seat during valve core rotation, so valve core rotation ten minutes light and flexible, and does not have abrasion condition compared to the prior art, can guarantee to have good sealing between spool and the single valve seat, can prolong the working life of ball valve.When the utility model ball valve uses, the advantage that not influenced by fluid temperature variations in addition.

Below with reference to accompanying drawing structure of the present utility model is described in further detail.

Fig. 1 is the plan view of the utility model ball valve

Fig. 2 be among Fig. 1 along the sectional view of A-A line, be closed state between spool and the single valve seat among the figure

Fig. 3 be among Fig. 1 along the sectional view of A-A line, be half-open position between spool and the single valve seat among the figure

Fig. 4 be among Fig. 1 along the sectional view of A-A line, be full-gear between spool and the single valve seat among the figure

Consult Fig. 1-Fig. 4, the utility model industry conveyance conduit comprises the valve body 1 of being with the fluid passage with ball valve, described body cavity bottom is provided with down lining 2, described body cavity is provided with the spool 4 of band horizontal through hole 3, the bearing surface of described spool lower end is with curved surface, preferably the form of sphere realizes movingly with following lining 2, spool 4 is complementary with the single valve seat 10 that is embedded in the valve body 1, the crushing of 4 pairs of single valve seats 10 of spool when closing in order to alleviate ball valve, hard alloy overlay welding one withstand voltage circle 15 can be used in the sphere contact position of described single valve seating face and spool, the upper end of spool 4 is provided with vertical through holes, be provided with a pair of roller bolt 11 in the described vertical through holes, horizontal through hole 3 is axially consistent in the axial and spool 4 of described roller bolt, the bar head 12 of band inclined-plane and secundly is made in the lower end of valve rod 5, the bar head of described valve rod stretches in the vertical through holes of spool 4, makes the inclined-plane of described bar head be close to roller bolt 11 formation movingly.The periphery of valve rod 5 is with lining 6, valve gap 7, the middle part of described valve rod is provided with helical guide groove 13, the bottleneck position of valve gap 7 is provided with the screw 14 that can be complementary with helical guide groove 13 motion, preferably 90 ° at the central angle in the relative valve rod of the horizontal projection of described helical guide groove axle center, the spool 4 and the folding of single valve seat 10 can correctly be located, the pitch of helical guide groove 13 depends on the size of described valve rod travel, when pitch increases, and the also corresponding increase of the length of helical guide groove 13.Be plugged with filler 8 between valve gap 7 tops and the valve rod 5, valve rod 5 ends are connected with valve rod travel actuator 9, the cylinder piston type valve rod travel actuator that described valve rod travel actuator can adopt known technology also can adopt the straight movement type driven by motor or use the manual opening stem stroke actuators.

When the utility model industry conveyance conduit uses with ball valve, earlier with valve channel two ends access industrial conveyance conduit, termination valve rod travel actuator on the valve rod.With cylinder piston type valve rod travel actuator is example, when the cylinder exhaust, when Returnning spring makes descent of piston, valve rod is along with descending and turn over an angle, valve rod goed deep into spool and spool was rotated on the lining down this moment, when horizontal through hole in the spool axially with valve body fluid passage axially mutual vertical the time, inclined-plane on the valve club head compresses roller bolt, and roller bolt forces the ball surface of spool to compress the single valve seat again, thereby reaches the purpose that blocking-up conveyance conduit inner fluid flows.When cylinder charging, it is up that piston overcomes the resistance of Returnning spring, valve rod is along with piston stroking upward and rotation simultaneously, retreat in the vertical through holes of valve club head by the spool upper end, roller bolt glides relatively along valve club head inclined-plane, make spool ball surface disengage, also turn over simultaneously an angle with the single valve seat, when valve rod rises to the extreme higher position, valve rod turns over 90 ° of angles, the spool that rotates also turns over 90 ° of angles synchronously, axial axial consistent with the valve body fluid passage of the horizontal through hole of this moment in the spool, ball valve is in the standard-sized sheet working state.Described valve rod also can be regulated by the screw on the valve gap bottleneck at the tightness of valve gap intrinsic displacement.

Claims

1, a kind of industrial conveyance conduit ball valve, comprise the valve body (1) of being with the fluid passage, be located at the following lining (2) of body cavity, the spool (4) of band horizontal through hole (3), valve rod (5), be enclosed within the last lining (6) of described valve rod periphery, valve gap (7), filler (8), the valve rod travel actuator (9) that is connected with valve rod (5), it is characterized in that the form and following lining (2) realization dynamic fit of the anchor plate surface of spool (4) lower end with curved surface, described spool is complementary with the single valve seat (10) that is embedded in the valve body, described spool upper end is provided with vertical through holes, the perisporium of described vertical through holes is provided with roller bolt (11), horizontal through hole (3) is axial consistent in the axial and spool of described roller bolt, band inclined-plane and inclined to one side to bar head (12) is on one side made in the lower end of valve rod (5), the bar head of described valve rod stretches in the vertical through holes of spool (4), make the inclined-plane of described bar head be close to roller bolt formation movingly, described valve rod middle part is provided with helical guide groove (13), and valve gap (7) bottleneck position is provided with the screw (14) that can be complementary with described helical guide groove motion.

2, industrial conveyance conduit ball valve according to claim 1 is characterized in that the surface of spool (4) lower end anchor plate is a sphere.

3, industrial conveyance conduit ball valve according to claim 1 and 2 is characterized in that single valve seat (10) surface is provided with withstand voltage circle (15) with spool (4) contact position.

4, conveyance conduit ball valve according to claim 1 and 2 is characterized in that the central angle in the relative valve rod of the horizontal projection axle center of helical guide groove (13) is 90 °.

5, industrial conveyance conduit ball valve according to claim 3 is characterized in that the central angle in the relative valve rod of the horizontal projection axle center of helical guide groove (13) is 90 °.