CN112096904B - A telescopic frictionless ball valve driven by a disc motor in conjunction with a surface cam - Google Patents

Abstract

The invention relates to the field of friction-free ball valves, in particular to a telescopic friction-free ball valve driven by a disc motor and a face cam, which comprises an upper disc motor stator, a lower disc motor stator and a disc motor rotor, wherein the disc motor rotor is fixedly connected with an output shaft; the tail end of the transmission cylinder is fixedly connected with the valve core shaft through a pin shaft; the hollow spherical valve body is fixedly connected to the lower end of the transmission mechanism mounting frame, the bottom of the valve core shaft is inserted into a square hole in the center of the upper top surface of the square valve core, and a threaded release bolt at the lower end of the upper end optical axis is inserted into a round hole in the lower bottom surface of the valve core. The invention adopts the disc type motor with the characteristics of low rotating speed and large torque as a power source, is suitable for the working principle of the frictionless ball valve, directly drives the transmission mechanism and the valve core without a speed reducing mechanism, and has higher control precision and higher response speed.

Description

A telescopic frictionless ball valve driven by a disc motor in conjunction with a surface cam

technical field

The invention relates to the field of frictionless ball valves, in particular to a telescopic frictionless ball valve driven by a disc motor in conjunction with a surface cam.

Background technique

As a big country in oil transportation and consumption, my country has more than 20,000 kilometers of pipelines for oil transportation, and it is increasing year by year. Ball valves are widely used in oil and gas transportation pipelines as an important component for regulating pipeline flow. Because the ball valve has the characteristics of small fluid resistance, fast opening and closing speed and simple operation, it is widely used in petroleum, chemical, power station and other industries. The seal of the ball valve is formed by the pre-set pre-tightening force between the ball and the valve seat plus the force caused by the liquid pressure on the sealing surface of the valve seat.

Traditional ball valves generally have the following defects: 1. During the opening and closing process of the valve, the ball is always in close contact with the valve seat, and the friction is large when rotating. After long-term repeated use, the ball and the valve seat are seriously worn. ②. After long-term and frequent operation, the valve core will be worn, which will cause the valve to leak and other bad conditions in the on or off state, and the service life is short. ③. The opening and closing operation is very laborious, and is often limited by the use environment including the flow cut-off temperature and pressure. The design of the drive device of the large ball valve is not perfect, and the reducer and other parts are large, which is not conducive to installation and other problems that affect its performance, and it is difficult to meet the needs of modern industrial production.

There are two types of frictionless ball valves currently on the market. One is the offset type frictionless ball valve. The eccentric lever is used to move the valve core along the bottom central axis to produce an offset, and the valve core and the valve seat are out of contact, so that the process of opening and closing the valve is frictionless; the other type is the orbital type. Frictionless ball valve, the spool part of this kind of frictionless ball valve is mostly wedge-shaped spool, and the spool and valve disc are made separately and move in coordination with each other, which can convert the vertical displacement of the up and down into the horizontal displacement of the disc to achieve the effect of frictionless. The above two types of frictionless ball valves also have complicated transmission mechanism design, and the offset type frictionless accidental sealing effect has major defects, so they cannot be used in key pipelines.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the above background technology, the present invention proposes a telescopic frictionless ball valve driven by a disc motor in conjunction with a surface cam, which applies the idea of a special motor, a surface cam transmission mechanism, and the valve disc can be retracted and separated from the valve body to the traditional valve body. In the design of the ball valve, the precise control of the power element is achieved, the transmission structure is simple and the efficiency is high, and the valve core and the valve disc are out of contact with the valve seat during the rotation process, so as to achieve the purpose of frictionless movement.

The technical scheme of the present invention to realize the above functions is: a disc motor cooperates with a surface cam to drive a telescopic frictionless ball valve, and its special features are:

Including the upper stator of the disc motor, the upper stator of the disc motor is fixedly connected with the lower stator of the disc motor, the disc motor rotor is installed inside the upper stator of the disc motor and the lower stator of the disc motor, and the rotor of the disc motor is fixed with the output shaft. The lower half of the output shaft is fixed with a circular roller;

A transmission mechanism mounting frame is fixedly connected to the lower side of the lower stator of the disc motor. The transmission mechanism mounting frame is provided with a first pin hole, a second pin hole, a third pin hole and a fourth pin hole. A first electric push rod, a second electric push rod, a third electric push rod and a fourth electric push rod are respectively installed on the outside of the pin hole, the third pin hole and the fourth pin hole;

It also includes a transmission cylinder, the transmission cylinder is installed inside the transmission mechanism mounting frame, the upper half of the transmission cylinder is provided with an arc-shaped groove, the circular roller extends into the arc-shaped groove, and the lower half of the transmission cylinder is respectively provided with a U-shaped guide groove and I-shaped guide groove; the end of the transmission cylinder is fixedly connected with the spool shaft through the pin shaft;

The hollow spherical valve body is fixedly connected to the lower end of the transmission mechanism mounting frame, and a cube-shaped valve core is installed inside the hollow spherical valve body; four grooves are provided on the four horizontal surfaces of the cube-shaped valve core, namely: the first groove, the second groove Groove, third groove, and fourth groove; the first groove and the second groove are opposite, and two closed valve flaps are installed, and the third groove and the fourth groove are opposite, and two open position valves are installed valve;

The bottom of the spool shaft is inserted into the square hole in the center of the top surface of the cube-shaped spool, and the four sides of the upper top surface of the cube-shaped spool are respectively provided with rectangular first slideway, second slideway, third slideway and No. Four slideways, the first slideway, the second slideway, the third slideway and the fourth slideway are respectively installed with a first slider, a second slider, a third slider and a fourth slider; the first slider The front end of the block and the second sliding block are fixedly connected to the back of the closed valve disc, and the front ends of the third sliding block and the fourth sliding block are fixedly connected to the back of the opening valve disc; the other ends of the sliding blocks are respectively connected by the first crank and the second crank. , the third crank, the fourth crank is connected with the spool shaft;

There is a round hole in the center of the bottom surface of the valve core, into which the upper half optical shaft section of the threaded relief bolt at the lower end of the upper optical shaft is inserted, and the lower half threaded section of the threaded relief bolt at the lower end of the upper optical shaft and the hollow spherical valve body Solid seal.

Further, a first pin hole, a second pin hole, a third pin hole and a fourth pin hole are uniformly distributed on the circumference of the above-mentioned transmission mechanism mounting frame.

Further, the lower half-threaded section of the threaded relief bolt at the lower end of the upper optical axis and the hollow spherical valve body form a fixed connection and seal through threads.

Advantages of the present invention:

1. The present invention uses a disc motor with low speed and high torque as the power source, which is suitable for the working principle of the frictionless ball valve. It directly drives the transmission mechanism and the valve core without going through the deceleration mechanism, with higher control accuracy and faster response speed. quick;

2. The transmission mechanism of the present invention has fewer components, overcomes the defects of the traditional orbital frictionless ball valve transmission orbital structure being complex and the transmission precision is low, and has higher transmission efficiency and higher transmission precision;

3. The valve body part of the present invention adopts the structure that the valve core is installed with the valve disc and the valve disc can be retracted, which can achieve the separation of the valve disc and the valve body, so that there is no friction during the valve operation process, which overcomes the previous wedge-shaped valve core. There is still friction in the process, which greatly prolongs the life of the valve body;

4. The valve flap of the present invention relies on the crank connecting rod mechanism to realize the horizontal displacement of the valve flap, and does not require another set of redundant power mechanisms to meet the motion requirements, saving design space;

5. The groove at the bottom of the valve core of the present invention cooperates with the special relief bolt design, which can play a supporting and guiding role in the rotation process of the valve core. liquid.

Description of drawings

Fig. 1 is the sectional structure diagram when the ball valve is completely closed in the embodiment of the present invention;

2 is a cross-sectional structural view of the ball valve when the ball valve is fully opened in the embodiment of the present invention;

3 is a cross-sectional view of the height of the center of the first pin hole 41 of the present invention;

Fig. 4 is the structural diagram of the key component transmission cylinder 5 in the present invention;

Fig. 5 is another direction view of Fig. 4;

Figure 6 is a perspective view of the overall structure of the telescopic valve core part of the present invention;

Fig. 7 is the axial side view of the component valve core 9 in the present invention;

FIG. 8 is a structural diagram of the component opening valve flap 16 in the present invention;

FIG. 9 is a structural diagram of the closed position valve flap 7 in the present invention;

FIG. 10 is an isometric view of the component spool shaft 12 in the present invention.

In the figure: 1. Upper stator of disc motor; 2. Rotor of disc motor; 3. Lower stator of disc motor; 4. Mounting frame of transmission mechanism; 41. First pin hole; 42, Second pin hole; Three pin holes; 44, the fourth pin hole; 45, the first electric push rod; 46, the second electric push rod; 47, the third electric push rod; 48, the fourth electric push rod; 5, the transmission cylinder; 51, U 52. I-shaped guide groove; 53. Arc-shaped groove; 6. Hollow spherical valve body; 7. Close valve disc; 8. Threaded relief bolt at the lower end of the upper optical shaft; 9. Cube-shaped valve core; 91, the first slide; 92, the second slide; 93, the third slide, 94, the fourth slide; 95, the square hole; 96, the round hole; 97, the first groove; 98, the second concave groove; 99, the third groove; 910, the fourth groove; 101, the first slider; 102, the second slider; 103, the third slider; 104, the fourth slider; 111, the first crank; 112, the second crank; 113, the third crank; 114, the fourth crank; 12, the valve core shaft; 13, the pin shaft; 14, the roller; 15, the output shaft; 16, the open valve disc.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

As shown in Figures 1 to 10, a telescopic frictionless ball valve driven by a disc motor in cooperation with a surface cam includes an upper stator 1 of the disc motor, and the upper stator 1 of the disc motor is fixedly connected with the lower stator 3 of the disc motor. A disc motor rotor 2 is installed inside the upper stator 1 of the disc motor and the lower stator 3 of the disc motor. The disc motor rotor 2 is fixedly connected with the output shaft 15, and the lower half of the output shaft 15 is fixed with a circular roller 14. The transmission mechanism mounting frame 4 is fixedly connected to the lower side of the lower stator 3 of the disc motor, and the transmission mechanism mounting frame 4 is evenly distributed with a first pin hole 41 , a second pin hole 42 , a third pin hole 43 and a fourth pin hole 44 , the outer sides of the first pin hole 41, the second pin hole 42, the third pin hole 43 and the fourth pin hole 44 are respectively installed with a first electric push rod 45, a second electric push rod 46, a third electric push rod 47 and The fourth electric push rod 48 . The transmission cylinder 5 is installed inside the transmission mechanism mounting frame 4, the upper half of the transmission cylinder 5 is provided with an arc-shaped groove 53, the circular roller 14 is embedded in the arc-shaped groove 53, and the lower half of the transmission cylinder 5 is respectively provided with U shape guide groove 51 and I-shaped guide groove 52. The end of the transmission cylinder 5 is fixedly connected with the valve core shaft 12 through the pin shaft 13 . The hollow spherical valve body 6 is fixedly connected to the lower end of the transmission mechanism mounting frame 4 . A cube-shaped valve core 9 is installed inside the hollow spherical valve body 6 . Four grooves are provided on the four horizontal surfaces of the cube-shaped valve core 9 , a first groove 97 , a second groove 98 , a third groove 99 , and a fourth groove 910 . The first groove 97 and the second groove 98 are opposite to each other, and two closed valve flaps 7 are installed. The third groove 99 and the fourth groove 910 are opposite to each other, and two opening valve flaps 16 are installed. The bottom of the valve core shaft 12 is inserted into the square hole 95 in the center of the top surface of the square valve core 9 . A rectangular first slide 91 , a second slide 92 , a third slide 93 and a fourth slide 94 are respectively opened on the four sides of the upper top surface of the cube-shaped valve core 9 . A first sliding block 101 , a second sliding block 102 , a third sliding block 103 and a fourth sliding block 104 are installed inside the first slideway 91 , the second slideway 92 , the third slideway 93 and the fourth slideway 94 , respectively. . The front ends of the first sliding block 101 and the second sliding block 102 are fixedly connected to the back of the closed valve flap 7 , and the front ends of the third sliding block 103 and the fourth sliding block 104 are fixedly connected to the back of the opening valve flap 16 . The other end of the slider is connected to the valve core shaft 12 by a first crank 111 , a second crank 112 , a third crank 113 and a fourth crank 114 respectively. There is a circular hole 96 in the center of the lower bottom surface of the valve core 9. The circular hole 96 is inserted into the upper half optical axis section of the lower end threaded relief bolt 8 of the upper optical axis, and the lower half threaded section of the threaded relief bolt 8 at the lower end of the upper optical axis is inserted. A fixed seal is formed with the hollow spherical valve body 6 through threads.

1 is a sectional view of the closed state of the ball valve, the roller 14 is at the highest position of the arc-shaped groove 53, and the upper end of the vertical side of the U-shaped guide groove 51 is not the side opposite to the I-shaped guide groove. At the position where the pin holes 41 are completely overlapped, the I-shaped guide groove 52 is on the opposite side of the cross-sectional view, and its upper end is completely overlapped with the third pin hole 43, which is not visible in this cross-sectional view. When the transmission mechanism is in the above position, the valve core shaft 12 is at the lowest point of the vertical height, and the end square shaft segment is inserted into the bottom of the square hole 95 in the center of the top surface of the cube-shaped valve core 9, and passes through the first crank 111 and the second crank 112. The first sliding block 101 and the second sliding block 102 are pushed out respectively at the outermost end of their respective slideways, and the closed valve flap 7 is in the pushed out state, blocking the fluid, and the valve is closed.

Fig. 2 shows the valve open state. Compared with the valve closed state in Fig. 1, the entire transmission mechanism and the overall structure of the cube-shaped valve core 9 have been rotated by 90°. At this time, the other vertical side of the U-shaped guide groove 51 At the position where the highest point completely coincides with the pin hole 41, the I-shaped guide groove 52 appears in the cross-section after rotating 90° counterclockwise, the highest point completely coincides with the pin hole 42, and the lowest segment of the arc-shaped groove 53 is in the visible position of the cross-section. place. The open valve disc 16 is pushed out to fit the flow channel, and the valve is opened.

Referring to FIG. 4 and FIG. 5 , the vertical height change of the arc groove 53 is the upward or downward displacement of the spool shaft 12 . The positions of the four slideways on the top surface of the cube-shaped valve core 9 shown in Figures 6 and 7 are located. There are raised edges on the left and right sides of each slideway, which cooperate with the grooves on the side of the four sliders, thereby restricting the four slideways. Blocks cannot leave the chute vertically. FIG. 10 shows that the spool shaft 12 is a 4-stage stepped shaft. The pin hole opened at the uppermost end is used to install the pin shaft 13 of the transmission, the secondary has no effect, the second stage is a square cylinder, and the first crank 111, the second crank 112, and the third crank 113 are installed on the four surfaces. The fourth crank 114, the bottommost square cylinder segment is inserted into the square hole 95 in the center of the top surface of the cube-shaped valve core 9, and is used for transmitting the movement of rotating 90°.

The working principle of the present invention is:

1. The process of switching the valve of the present invention from closing to opening: the first electric push rod 45 outside the first pin hole 41 stretches out and is inserted until the top of the vertical side of the U-shaped guide groove 51 on the transmission cylinder 5 passes through. The upper stator 1 of the motor and the lower stator 3 of the disc motor are energized to drive the rotor 2 of the disc motor and the output shaft 15 to rotate counterclockwise, and the rollers 14 rotate counterclockwise together. Since the first electric push rod 45 inserted into the first pin hole 41 is on the vertical side of the U-shaped guide groove 51 at this time, the transmission cylinder 5 cannot be rotated. Due to the oblique downward shape of the groove 53, the transmission cylinder cannot rotate with the roller 14, and the rotation is converted into a vertical upward movement along the vertical edge of the U-shaped guide groove 51, and the roller 14 rotates to the lowest end of the arc groove 53. , at this time, the entire transmission cylinder 5 has risen to the same height as the bottom edge of the U-shaped guide groove 51 and the first pin hole 41 . The bottom of the transmission cylinder 5 drives the spool shaft 12 to rise vertically through the pin shaft 13, and the rise of the spool shaft 12 drives the ends of the first crank 111, the second crank 112, the third crank 113, and the fourth crank 114 to rise, and then pulls the first crank The sliding block 101, the second sliding block 102, the third sliding block 103 and the fourth sliding block 104 move toward the center along the respective slideways, thereby driving the closed position valve flap 7 to move toward the center direction. The spherical surface is then out of contact with the inner cavity of the hollow spherical valve body 6 . When the upward movement is completed, the output shaft 15 continues to rotate, the roller 14 is already at the lowest end of the arc-shaped groove 53, and pushes the transmission cylinder 5 to rotate 90° counterclockwise to stop, the first electric push rod 45 inserted into the first pin hole 41 At this time, it is at the bottom of the other vertical side of the U-shaped guide groove 51 . The I-shaped guide groove 52 rotates to the position where its bottom end completely coincides with the second pin hole 42. At this time, the second electric push rod 46 outside the second pin hole 42 extends into the I-shaped guide groove 52 until the first The electric push rod 45 is retracted. The transmission cylinder 5 rotates 90° and is transmitted to the valve core shaft 12 through the pin shaft 13. The bottommost square cylinder segment is still in the square hole 95 in the center of the top surface of the valve core 9 after rising, so it can drive the valve core 9 counterclockwise. Rotate 90° until the through hole of the open valve disc 16 is parallel to the pipeline. Then the motor reverses, the output shaft 15 rotates clockwise at this time, the second electric push rod 46 newly inserted from the second pin hole 42 extends into the bottom end of the I-shaped guide groove 52, and the roller 14 follows the arc-shaped groove. 53 moves in the opposite direction, limited by the push rod inserted in the I-shaped guide groove 52, the transmission cylinder 5 can only move vertically downward. The transmission cylinder 5 drives the spool shaft 12 to move downward, and then drives the first crank 111, the second crank 112, the third crank 113, and the fourth crank 114 to move down, pushes the respective connected sliders to move outward, and further pushes the opening. The position valve flap 16 moves outward until the spherical surface is completely fitted with the inner cavity of the hollow spherical valve body 6 , and at this time, the fluid flows through the opening valve flap 16 and the valve is opened.

2. The process of the valve of the present invention from opening to closing: the closing process of the valve is basically the same as the opening process, both the valve core shaft 12 first moves vertically upward to make the valve disc come out of contact, and then rotates 90°, and then the valve core shaft 12 Push the crank and the slider vertically downward, and further push the closing valve flap 7 to make it fully fit with the hollow spherical valve body 6 . In this process, the U-shaped guide groove 51 has been rotated by 90° compared with the previous process, so when using the pin hole on the transmission mechanism mounting frame 4, it becomes the third pin hole 43 and the fourth pin hole 44. The third electric push rod 47 and the fourth electric push rod 48 may perform the same actions as the previous process in sequence.

3. The process of discharging the residual liquid after the valve state switching of the present invention is completed: the upper end optical axis part of the upper end optical axis and the lower end threaded relief bolt 8 plays a guiding and limiting role for the movement of the conical valve core in the above two processes. After the state switching is completed, the threaded relief bolt 8 at the lower end of the upper end of the optical axis is rotated from the outside to disengage from the bottom of the hollow spherical valve body 6, and the residual liquid in the cavity can be discharged.

The above are only the embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related The system field of the present invention is similarly included in the scope of patent protection of the present invention.

Claims (3)

1. The utility model provides a telescopic frictionless ball valve of disk motor cooperation face cam drive which characterized in that:

the disc type motor rotor structure comprises a disc type motor upper stator (1), wherein the disc type motor upper stator (1) is fixedly connected with a disc type motor lower stator (3), a disc type motor rotor (2) is arranged inside the disc type motor upper stator (1) and the disc type motor lower stator (3), the disc type motor rotor (2) is fixedly connected with an output shaft (15), and a round roller (14) is fixedly connected with the lower half section of the output shaft (15);

a transmission mechanism mounting frame (4) is fixedly connected to the lower side of the disc type motor lower stator (3), a first pin hole (41), a second pin hole (42), a third pin hole (43) and a fourth pin hole (44) are formed in the transmission mechanism mounting frame (4), and a first electric push rod (45), a second electric push rod (46), a third electric push rod (47) and a fourth electric push rod (48) are respectively mounted on the outer sides of the first pin hole (41), the second pin hole (42), the third pin hole (43) and the fourth pin hole (44);

the roller type roller chain transmission mechanism is characterized by further comprising a transmission cylinder (5), wherein the transmission cylinder (5) is installed inside the transmission mechanism installation frame (4), an arc-shaped groove (53) is formed in the upper half portion of the transmission cylinder (5), the circular roller (14) extends into the arc-shaped groove (53), and a U-shaped guide groove (51) and an I-shaped guide groove (52) are respectively formed in the lower half portion of the transmission cylinder (5); the tail end of the transmission cylinder (5) is fixedly connected with the valve core shaft (12) through a pin shaft (13);

the hollow spherical valve body (6) is fixedly connected to the lower end of the transmission mechanism mounting frame (4), and a square valve core (9) is installed inside the hollow spherical valve body (6); four grooves are formed in four side faces of the square valve core (9) and are respectively as follows: a first groove (97), a second groove (98), a third groove (99), a fourth groove (910); wherein the first groove (97) is opposite to the second groove (98) and is provided with two closing valve flaps (7), the third groove (99) is opposite to the fourth groove (910) and is provided with two opening valve flaps (16);

the bottom of the valve core shaft (12) is inserted into a square hole (95) in the center of the upper top surface of the square valve core (9), a first rectangular slide way (91), a second rectangular slide way (92), a third rectangular slide way (93) and a fourth rectangular slide way (94) are respectively arranged on four sides of the upper top surface of the square valve core (9), and a first slide block (101), a second slide block (102), a third slide block (103) and a fourth slide block (104) are respectively arranged in the first slide way (91), the second slide way (92), the third slide way (93) and the fourth slide way (94); the front ends of the first sliding block (101) and the second sliding block (102) are fixedly connected with the back surface of the closing valve clack (7), and the front ends of the third sliding block (103) and the fourth sliding block (104) are fixedly connected with the back surface of the opening valve clack (16); the other end of the sliding block is respectively connected with the valve core shaft (12) through a first crank (111), a second crank (112) and a third crank (113), and a fourth crank (114);

a round hole (96) is formed in the center of the lower bottom surface of the valve core (9), an upper semi-optical axis section of the upper-end optical axis lower-end threaded release bolt (8) is inserted into the round hole (96), and the lower semi-threaded section of the upper-end optical axis lower-end threaded release bolt (8) is fixedly connected with the hollow spherical valve body (6) in a sealing mode.

2. The disc motor and face cam driven telescopic frictionless ball valve of claim 1, wherein:

a first pin hole (41), a second pin hole (42), a third pin hole (43) and a fourth pin hole (44) are uniformly distributed on the circumference of the transmission mechanism mounting frame (4).

3. A disc motor and face cam driven telescopic frictionless ball valve according to claim 1 or 2, wherein:

and the lower half thread section of the upper end optical axis lower end thread type relief bolt (8) is fixedly connected and sealed with the hollow spherical valve body (6) through threads.

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