CN220320432U - Ball valve for industrial gas meter - Google Patents

Abstract

The ball valve for the industrial gas meter comprises a valve body, a valve cover, a valve seat, a ball body and a valve rod, wherein the valve rod is connected with a closed cavity after extending out of the valve body, a controller is arranged above the closed cavity, a base plate is horizontally arranged inside the closed cavity, a positioning groove and an arc groove are formed in the base plate, a stop block mechanism and a driving motor for providing power for the ball valve are arranged above the base plate, and a speed reducing mechanism for reducing the rotating speed of the driving motor is arranged below the base plate; the reduction gears is secondary gear structure, includes: the device comprises a driving wheel arranged on a rotating shaft of a driving motor, a driven wheel meshed with the driving wheel, a large gear arranged on a valve rod and a small gear meshed with the large gear, wherein the small gear and the driven wheel are arranged below a substrate through an intermediate shaft. By adopting the structure, the ball valve and the controller are integrated, the installation space and the material cost are saved, the volume of the ball valve is reduced, the maintenance and the replacement are convenient, and the abrasion and the loss of the valve rod are eliminated, so that the gas leakage can be prevented.

Description

Ball valve for industrial gas meter

Technical Field

The utility model belongs to the field of gas meters, and particularly relates to a ball valve for an industrial gas meter.

Background

An industrial flowmeter is one of metering instruments and is used for metering gas energy. At present, the flowmeter production in China is in a rapid development stage, so that a plurality of benefits are brought to the country and people, and the national importance is obtained. However, in the prior ball valve transmission, the abrasion of a valve rod can occur in the later stage, so that the phenomenon of micro leakage occurs when the ball valve is not tightly closed.

The utility model discloses a multifunctional electric ball valve as in the patent of 202222800027.1, including two-way ball valve, electric actuator, the two-way ball valve inner chamber rotates and is provided with the valve ball and the sealing assembly of sealing up the sealing up ring of taking the valve rod, electric actuator is inside to be equipped with electric control module, actuating mechanism, backstop mechanism, when using, electric control module output power makes its operation for driving motor, driving motor drives driving gear subassembly operation, driving gear subassembly drives valve rod pivot backstop piece and valve rod and is in order, anticlockwise rotation, makes electric control module outage through micro-gap switch. The multifunctional electric ball valve is also provided with a manual switch control mode, when the electric actuator is suddenly powered off, the valve ball can be controlled to be opened or closed through the manual switch, and the problems of system operation damage, resource waste, potential safety hazard and the like caused by failure of the electric actuator are avoided. The lower end of the gear shaft of the ball valve driving gear is connected with the top of the valve rod in an embedded mode through the groove, so that the driving gear drives the valve rod and the valve ball to rotate for a long time, abrasion is generated between the gear shaft and the valve rod, and accordingly in the ball valve switching process, the ball body cannot be completely closed due to the fact that the ball body cannot rotate in place, and micro leakage occurs.

Disclosure of Invention

The utility model aims to solve the problems of the prior art, provides a ball valve for an industrial gas meter, and solves the problems of large pressure loss in a valve opening state and micro leakage caused by loose closing of the ball valve due to abrasion of a valve rod in the later period.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a ball valve for an industrial gas meter, comprising: the valve body extends out and is connected with a closed cavity, a controller is arranged above the closed cavity, a base plate is horizontally arranged in the closed cavity, a positioning groove is formed in the base plate, a stop block mechanism and a driving motor for providing power for the ball valve are arranged above the base plate, and a speed reducing mechanism for reducing the rotating speed of the driving motor is arranged below the base plate; the reduction gears is secondary gear structure, and it includes: the driving motor is connected with the driving wheel after a rotating shaft of the driving motor penetrates through the base plate, the driven wheel and the pinion are arranged below the base plate through the intermediate shaft, the large gear is arranged on the valve rod, and the valve rod penetrates out of the positioning groove and then is connected with the stop block mechanism.

The beneficial effects are that: the ball valve and the controller are integrated, so that the installation space and the material cost are saved, the structure is adopted, the volume of the ball valve is reduced, the maintenance and the replacement are convenient, the large gear is connected to the valve rod, the output torque is increased through the speed reducing mechanism, the load inertia is reduced, the ball body is directly driven to rotate, the abrasion and the loss of the valve rod are eliminated, and the gas leakage is prevented.

Further, the arc-shaped groove has been seted up to the base plate, dog mechanism includes: the automatic stop device comprises a limiting block, a travel switch A and a travel switch B, wherein the travel switch A and the travel switch B are arranged on two sides of the limiting block, the contact points of the travel switch A and the travel switch B face the same and are positioned on the same horizontal line, a heightening block is respectively arranged between the travel switch A and the substrate, a valve rod extends out of a locating slot and is fixedly connected with one end of the limiting block, the other end of the limiting block is vertically connected with a limiting screw, a screw rod part of the limiting screw rod extends out of an arc-shaped slot, the height of a screw head is matched with the height of the travel switch A and the height of the travel switch B, the valve rod drives the limiting block to rotate under the action of a driving motor, and when the screw head touches the travel switch A or the travel switch B, a controller sends a stop rotation signal to the driving motor, and the driving motor stops rotating.

The beneficial effects are that: the limit block is arranged to touch the travel switch A or the travel switch B, so that the time of switching the valve is shortened, the valve is opened and closed rapidly, the travel switch A and the travel switch B are arranged on the same horizontal line, and the ball valve is prevented from excessively opening and closing.

Further, a stuffing box is arranged at the contact position of the valve rod and the valve body.

The beneficial effects are that: the sealing performance of the valve rod and the valve body can be effectively enhanced by using the packing seal.

Furthermore, 4 limiting holes are uniformly distributed on the inner side of the valve cover, springs are placed in the limiting holes, and the end faces of the springs are contacted with the end faces of the valve seat.

The beneficial effects are that: the spring is arranged in the valve cover, so that the tightness of the valve cover and the valve body is enhanced.

Furthermore, the valve seat is made of polytetrafluoroethylene material, and the valve seat is tightly connected with the ball body.

The beneficial effects are that: the valve seat adopts polytetrafluoroethylene, and polytetrafluoroethylene has the characteristic of high temperature resistance, and its coefficient of friction is extremely low has the self-lubricating effect, has reduced the wearing and tearing between disk seat and the spheroid, utilizes polytetrafluoroethylene plastic deformation automatic compensation to be because of the error that wearing and tearing brought, reaches sealing performance good, long service life's effect.

Further, rubber sealing rings are arranged at the contact positions of the valve seat and the valve cover with the valve body.

The beneficial effects are that: the rubber sealing ring can prevent gas leakage and enhance the sealing of the valve body.

Further, the controller comprises a control box and a liquid crystal display screen, wherein a control box cover is arranged above the control box, and the liquid crystal display screen is arranged on the control box cover.

The beneficial effects are that: the controller can supply power to the driving motor and control the starting, stopping, forward rotation and reverse rotation of the driving motor, and simultaneously, the state of the switch valve and parameters of the ball valve and the driving motor are visually presented to a user through the liquid crystal display.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the valve-opening state of the present utility model;

FIG. 3 is a schematic diagram of the structure of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3A in accordance with the present utility model;

FIG. 5 is a cross-sectional view of the enclosed cavity and its internal structure;

FIG. 6 is a schematic view of a valve stem according to the present utility model;

FIG. 7 is a cross-sectional view of the valve stem and stopper of the present utility model;

FIG. 8 is a schematic view of a substrate structure according to the present utility model;

fig. 9 is a schematic view of a valve cover according to the present utility model.

In fig. 1-9: 1. a controller; 2. a driving motor; 3. a speed reducing mechanism; 4. a stop block mechanism; 5. a ball valve; 21. a driving wheel; 321. driven wheel; 31. a large gear; 32. an intermediate shaft; 41. a limiting block; 42. a travel switch A; 43. a travel switch B; 44. a substrate; 51. a valve body; 52. a valve cover; 53. a valve seat; 54. a sphere; 55. a closed cavity; 56. a valve stem; 110. a control box; 120. a liquid crystal display; 130. controlling the box cover; 322. a pinion gear; 411. a limit screw; 430. a lifting block; 441. a positioning groove; 442. an arc-shaped groove; 511. a stuffing box; 521. a limiting hole; 541. a groove; 561. a clamping groove; 562. a slot.

Detailed Description

In order that the utility model may become more readily apparent, the utility model is further explained below with reference to the accompanying drawings.

As shown in fig. 1 to 9, the present utility model provides a ball valve for an industrial gas meter, comprising: valve body 51, valve seat 53, ball 54, valve rod 56 and valve cover 52, reduction mechanism 3, and stopper mechanism 4.

In the utility model, the valve body 51 is made of the same material as a pipeline, so that extrusion deformation caused by uneven stress can be avoided, the ball 54 is arranged in the middle of the valve body 51, a through hole for circulating media is formed in the ball 54, one end of the axis of the ball 54 is provided with a groove 541 connected with a valve rod 56, deformation damage caused by long-time connection of the ball 54 and the valve rod 56 is avoided, a stressed contact surface and strength are increased, a valve seat 53 is arranged on two sides of the ball 54 for sealing, a valve cover 52 is arranged on two sides of the valve seat 53, and the valve cover 52 and the valve body 51 are in threaded connection, so that the valve is convenient to detach and install.

The upper end of the valve rod 56 is provided with a slotted hole 562, the lower end is provided with a clamping groove 561 which is matched with the groove 541, the valve rod 56 is connected with a closed cavity 55 after extending out of the valve body 51, a controller 1 is arranged above the closed cavity 55, a base plate 44 for preventing the valve rod 56 from separating from the ball 54 is horizontally arranged inside the closed cavity 55, the base plate 44 is provided with a positioning groove 441 and an arc groove 442 for limiting the end part of the valve rod 56, a driving motor 2 for providing power for the ball valve 5 is arranged above the base plate 44, a speed reducing mechanism 3 for reducing the rotating speed of the driving motor 2 is arranged between the rotating shaft of the driving motor 2 and the valve rod 56 after penetrating through the base plate 44, and a stop block mechanism 4 is arranged above the base plate 44.

In the present utility model, the reduction mechanism 3 is a two-stage gear structure, which includes: a driving wheel 21, a driven wheel 321 meshed with the driving wheel 21, a large gear 31, and a small gear 322 meshed with the large gear 31.

The driving wheel 21 is arranged on the rotating shaft of the driving motor 2, the large gear 31 is arranged at the end part of the valve rod 56, so that the linear connection between the valve rod 56 and the driving motor 2 is changed into rotary connection, and abrasion of the valve rod 56 is greatly reduced, the driven wheel 321 and the small gear 322 are coaxially arranged, and are arranged between the base plate 44 and the closed cavity 55 through the intermediate shaft 32, and the intermediate shaft 32 is movably connected with the base plate 44 and the closed cavity 55 through bearings respectively. When the ball valve 5 is in operation, after the output rotation speed of the driving motor 2 is input from the motor shaft, the driving wheel 21 is driven to rotate, the driven wheel 321 meshed with the driving wheel 21 starts to rotate, the pinion 322 is driven to rotate under the action of the intermediate shaft 32, meanwhile, the large gear 31 meshed with the pinion 322 starts to rotate, the large gear 31 drives the valve rod 56 to rotate around the axis of the large gear 31, and the valve rod 56 drives the ball 54 to rotate, so that the ball valve 5 is opened and closed. In the utility model, after the ball valve 5 passes through the secondary gear structure, the rotating speed of the driving motor 2 is reduced, the output torque is increased, and the inertia of a load is reduced, so that the loss of the valve rod 56 is eliminated, the gas leakage is prevented, and the safety is higher.

As shown in fig. 4, the stopper mechanism 4 includes: a limiting block 41, a travel switch A42 and a travel switch B43.

The travel switch a42 and the travel switch B43 are respectively disposed at two ends of the limiting block 41, the contacts of the travel switch a42 and the travel switch B43 face the same direction and are on the same horizontal line, so that the ball valve 5 can be prevented from excessively opening and closing, in order to improve sensitivity, a lifting block 430 for adjusting the height of the travel switch a42 and the travel switch B43 is respectively disposed between the travel switch a42 and the base plate 44, an end of the valve rod 56 is fixedly connected with the limiting block 41 through a slot 562 after the positioning slot 441 extends, the other end of the limiting block 41 is vertically connected with a limiting screw 411 (M4 screw), a screw portion of the limiting screw 411 extends out of the arc slot 442, and the height of a screw head is matched with the heights of the travel switch a42 and the travel switch B43. When the ball valve 5 works, the valve rod 56 drives the limiting block 41 to rotate through the speed reducing mechanism 3 under the action of the driving motor 2, and when the screw head of the limiting block 41 touches the travel switch A42 or the travel switch B43, the controller 1 sends a rotation stopping signal to the driving motor 2, and the driving motor 2 stops rotating. In the utility model, the stop block mechanism 4 has simple structure and compact layout, and saves the installation space, thereby reducing the cost.

As shown in fig. 3, in order to further prevent leakage of the medium, a packing 511 for enhancing sealability between the valve rod 56 and the valve body 51 is provided at a position where the valve rod 56 contacts the valve body 51.

As shown in fig. 3 and 9, 4 limiting holes 521 are uniformly distributed on the inner side of the valve cover 52, a spring is placed in the limiting holes 521, and the end surface of the spring contacts with the end surface of the valve seat 53; in the present utility model, by providing the spring, the sealability between the valve cover 52 and the valve body 51 is enhanced.

Meanwhile, in the utility model, the valve seat 53 is made of polytetrafluoroethylene material, so that the friction coefficient of the valve seat 53 and the ball body 54 is reduced, in the utility model, the ball body 54 and the valve seat 53 are tightly sealed and combined, the purpose of zero leakage can be achieved, and the error caused by abrasion can be automatically compensated by utilizing plastic deformation of the ball valve, so that the ball valve 5 achieves the purposes of good sealing performance and long service life.

The positions of the valve seat 53 and the valve cover 52, which are in contact with the valve body 51, are provided with rubber sealing rings, so that the leakage of the medium can be prevented when the medium flows through the valve seat, and the tightness and the safety of the ball valve 5 are further improved.

The controller 1 includes: the control box 110 and the liquid crystal display 120, control box cover 130 is arranged above control box 110, and liquid crystal display 120 is arranged on control box cover 130. When the ball valve 5 works, the controller 1 supplies power to the driving motor 2, controls the starting, stopping, forward rotation and reverse rotation of the driving motor 2, and directly displays the valve-opening state and the parameters of the ball valve 5 and the driving motor 2 to a user through the liquid crystal display 120.

The working process comprises the following steps:

firstly, the controller 1 sends a starting signal to the driving motor 2, the driving motor 2 starts to rotate positively and drives the driving wheel 21 to rotate, the driven wheel 321 meshed with the driving wheel 21 starts to rotate, at the moment, the pinion 322 starts to rotate and the large gear 31 meshed with the pinion 322 starts to rotate under the action of the intermediate shaft 32, so that the rotating speed of the driving motor 2 is reduced and the output torque is increased through the secondary gear reduction mechanism 3; simultaneously, the large gear 31 drives the valve rod 56 to rotate around the axis of the large gear, the valve rod 56 drives the ball 54 to rotate, and at the moment, the ball valve 5 is opened; meanwhile, the valve rod 56 drives the limiting block 41 to rotate, and when the limiting screw 411 on the limiting block 41 touches the travel switch A42, the controller 1 sends a rotation stopping signal to the driving motor 2, and the driving motor 2 stops rotating. At this point the ball 54 has rotated 90 counter-clockwise and the ball valve 5 is in a fully open condition, medium can flow through the ball 54 and there is no pressure loss in the ball valve 5. When the ball valve 5 is closed, the controller 1 sends a starting signal to the driving motor 2, the driving motor 2 starts to reversely rotate, the rotating speed of the driving motor 2 is reduced through the speed reducing mechanism 3, the torque is increased, the large gear 31 drives the valve rod 56 to rotate around the axis of the large gear, the valve rod 56 drives the ball 54 to rotate, and accordingly the ball valve 5 is closed, meanwhile, the valve rod 56 drives the limiting block 41 to reversely rotate, when the limiting screw 411 on the limiting block 41 touches the travel switch B43, the controller 1 sends a rotation stopping signal to the driving motor 2, and the driving motor 2 stops rotating. At this point, the ball 54 rotates 90 ° clockwise and the ball valve 5 is fully closed, thus shutting off the flow of medium.

Claims (7)

1. A ball valve for an industrial gas meter, comprising: the ball valve is characterized in that the valve rod (56) is connected with a closed cavity (55) after the valve body (51) stretches out, a controller (1) is arranged above the closed cavity (55), a base plate (44) is horizontally arranged inside the closed cavity, a positioning groove (441) is formed in the base plate (44), a stop block mechanism (4) and a driving motor (2) for providing power for the ball valve (5) are arranged above the base plate (44), and a speed reducing mechanism (3) for reducing the rotating speed of the driving motor (2) is arranged below the valve rod;

the speed reducing mechanism (3) is of a secondary gear structure and comprises: the automatic valve comprises a driving wheel (21), a driven wheel (321) meshed with the driving wheel (21), a large gear (31) and a pinion (322) meshed with the large gear (31), wherein a rotating shaft of a driving motor (2) penetrates through a substrate (44) and then is connected with the driving wheel (21), the driven wheel (321) and the pinion (322) are arranged below the substrate (44) through an intermediate shaft (32), the large gear (31) is arranged on a valve rod (56), and the valve rod (56) penetrates out of a positioning groove (441) and then is connected with a stop block mechanism (4).

2. The ball valve for an industrial gas meter according to claim 1, wherein the base plate (44) is provided with an arc groove (442), and the stopper mechanism (4) comprises: stopper (41) and locate travel switch A (42) and travel switch B (43) of stopper (41) both sides, travel switch A (42) and travel switch B (43)'s contact orientation is the same and be in same horizontal line, and is equipped with between its and base plate (44) respectively and fill up high piece (430), valve rod (56) stretch out rear end and stopper (41) one end fixed connection in constant head tank (441), a stop screw (411) is connected perpendicularly to stopper (41) other end, and this stop screw (411) screw rod part stretches out in arc groove (442), and the screw head height suits with travel switch A (42), travel switch B (43) height, valve rod (56) drive stopper (41) rotation under driving motor (2) effect, and when screw head touches travel switch A (42) or travel switch B (43), controller (1) give driving motor (2) and stop the rotation signal, driving motor (2) stop rotating.

3. A ball valve for an industrial gas meter according to claim 1, characterized in that the valve rod (56) is provided with a stuffing box (511) at the position where it contacts the valve body (51).

4. The ball valve for the industrial gas meter according to claim 1, wherein 4 limiting holes (521) are uniformly distributed on the inner side of the valve cover (52), a spring is placed in the limiting holes (521), and the end face of the spring is contacted with the end face of the valve seat (53).

5. A ball valve for an industrial gas meter according to claim 1, characterized in that the valve seat (53) is made of polytetrafluoroethylene material, and the valve seat (53) is tightly connected with the ball body (54).

6. The ball valve for the industrial gas meter according to claim 1, wherein rubber sealing rings are arranged at positions where the valve seat (53) and the valve cover (52) are contacted with the valve body (51).

7. A ball valve for an industrial gas meter according to claim 1, characterized in that the controller (1) comprises: the control box (110) and liquid crystal display (120), control box cover (130) are arranged above control box (110), and liquid crystal display (120) is arranged on control box cover (130).