CN218935318U

CN218935318U - Flow regulating valve

Info

Publication number: CN218935318U
Application number: CN202223476069.0U
Authority: CN
Inventors: 王展波; 梁长海; 商炳军
Original assignee: Tianjin Tanggu Gas Special Valve Co ltd
Current assignee: Tianjin Tanggu Gas Special Valve Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-28
Anticipated expiration: 2032-12-26
Also published as: CN218935318U8

Abstract

The utility model provides a flow regulating valve, which relates to the technical field of valves and comprises a valve body shell, wherein a screw rod is arranged in the valve body shell along the axial direction of the screw rod, a valve rod is arranged in the valve body shell along the radial direction of the screw rod, the screw rod is connected to the valve rod through a bevel gear reducer, the bevel gear reducer is supported on the inner wall of the valve body shell through a supporting seat, a sleeve is arranged on one side of the valve body shell, an overflow hole is formed in the sleeve, a sliding sleeve for blocking the overflow hole is sleeved in the sleeve, the sliding sleeve is in sliding connection with the sleeve, a nut seat in threaded fit with the screw rod is arranged on the sliding sleeve, the nut seat is fixedly connected to the sliding sleeve, and a limiting piece for horizontally sliding the sliding sleeve is fixedly connected to the sleeve; the sliding sleeve in the valve body moves forwards and backwards to control the opening of the valve airflow channel, so that the flow rate, the pressure and the like of the gas passing through the valve body are effectively controlled, turbulent flow is not generated when the fluid passes through the valve body, and cavitation is effectively eliminated.

Description

Flow regulating valve

Technical Field

The utility model relates to the technical field of valves, in particular to a flow regulating valve.

Background

The energy loss of the fluid in the gas transmission process of the long-distance gas transmission pipeline is divided into two types, namely the along-distance loss and the local loss, the operation conditions are various during the gas transmission, the gas transmission flow is different, and higher requirements are also provided for the flexibility and the operability of the modulating operation.

The prior art is provided with the following application number: in 'CN 202020697719.6', a valve convenient for adjusting the opening pressure is disclosed, which is used for solving the technical problems that the common valve is inconvenient to adjust the opening pressure, the valve is opened, i.e. closed, and the pressure cannot be adjusted, the pressure difference between the front and the back of the valve at the position where the flow is required to be adjusted in engineering is large, cavitation and vibration can be caused when the flow of the valve cannot be adjusted, and the valve rotating shaft and the sealing element are damaged when the flow is adjusted for a long time.

In order to solve the problems that when the flow regulating valve is used, the pressure difference between the front and the back of the valve is large, cavitation and vibration can be caused when the flow regulating valve is used for regulating the flow, and the valve shaft and the sealing element are damaged when the flow regulating valve is operated for a long time.

Disclosure of Invention

The utility model aims to provide a flow regulating valve which can regulate the flow passage area and solve the problems of cavitation and vibration caused by large pressure difference before and after the valve and flow regulation of the valve.

In a first aspect, an embodiment of the present application provides a flow regulating valve, including a valve body housing, in which a screw is disposed along an axial direction of the valve body housing, and in which a valve rod is disposed along a radial direction of the valve body housing, the screw is connected to the valve rod through a bevel gear reducer, and the bevel gear reducer is fixedly connected in the valve body housing; the screw rod is sleeved with a nut seat in threaded fit with the screw rod, one side of the nut seat is provided with a sliding sleeve, the outer side of the sliding sleeve is sleeved with a sleeve in sliding fit with the sliding sleeve, the sleeve is fixed on the valve body shell, and a limiting part for preventing the sliding sleeve from rotating is arranged on the sleeve.

In some embodiments of the present utility model, a flange is fixedly connected to the valve body housing, and the flange is seamlessly connected to the sleeve.

In some embodiments of the present utility model, a telescopic protection sleeve is sleeved on the screw, one end of the telescopic protection sleeve is in seamless connection with the sliding sleeve, and the other end of the telescopic protection sleeve is in seamless connection with the supporting seat.

In some embodiments of the present utility model, the bevel gear reducer is fixed to the inner wall of the valve body casing by a support base, the support base includes a central plate, at least one reinforcing plate is mounted on the central plate, one end of the reinforcing plate is fixedly connected to the inner wall of the valve body casing, and one end of the reinforcing plate is fixedly connected to the central plate.

In some embodiments of the present utility model, a protective cover is disposed on one side of the bevel gear reducer, and the protective cover is fixedly connected to the reinforcing plate.

In some embodiments of the present utility model, a plurality of through holes are formed in the sleeve, and the through holes are distributed on the side wall of the sleeve in a circumferential array.

In some embodiments of the present utility model, the limiting member includes a first guide plate and a second guide plate, both of which are fixedly connected to the sleeve, a sliding block capable of sliding along an axial direction of the screw is disposed between the first guide plate and the second guide plate, and the sliding block is fixed on the sliding sleeve.

In some embodiments of the utility model, an actuator is mounted to the valve body housing, the actuator having a drive shaft coupled to the valve stem.

Compared with the prior art, the embodiment of the utility model has at least the following advantages or beneficial effects:

1. in order to solve the problem that the front-rear pressure difference of the valve is large, cavitation and vibration can be caused by adjusting the flow by using the valve, the size of a channel of the overflow hole 21 is designed to be changed by moving the sliding sleeve 3 in the sleeve 2; the change of the flow passage area is realized by the linear motion of the sliding sleeve 3 along the axial direction of the pipeline, no matter where the sliding sleeve 3 is positioned, the section in the valve cavity is always annular, the outlet is contracted towards the axis, the air flow is guided to reversely collide and dissipate energy at the center of the valve port, cavitation bubbles are annihilated at the center, and therefore, the valve body and the pipeline are prevented from being damaged by cavitation possibly generated due to throttling.

2. The sliding sleeve in the valve body moves forwards and backwards to control the opening of the valve airflow channel, so that the flow rate, the pressure and the like of the gas passing through the valve body are effectively controlled, the flow channel in the valve body is axisymmetric, when the valve is opened, the air flow is converged at the outlet, turbulent flow is not generated when the fluid flows, and cavitation is effectively eliminated; when the valve body is fully closed, the gas flow is effectively prevented, and therefore, the transmission of upstream pressure is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 3 is a schematic view of a partial cross-sectional structure of an embodiment of the present utility model;

FIG. 4 is a cross-sectional line reference schematic diagram of FIG. 2 in accordance with an embodiment of the present utility model;

FIG. 5 is a cross-sectional line reference to FIG. 3 in accordance with an embodiment of the present utility model.

Icon: 1-a valve body housing; 2-a sleeve; 21-an overflow aperture; 3-sliding sleeve; 4-a screw; 5-a telescopic protective sleeve; 6-bevel gear reducer; 7-a valve rod; 8-a nut seat; 9-a flange; 10-a central panel; 11-reinforcing plates; 12-protecting cover; 13-a first guide plate; 14-a second guide plate; 15-a slider; 16-actuator.

Detailed Description

Example 1

Referring to fig. 1, fig. 1 is a schematic overall structure of the present embodiment, fig. 2 is a schematic structural diagram of a section A-A in fig. 4, and fig. 3 is a schematic structural diagram of a section B-B in fig. 5; the embodiment provides a flow regulating valve, which comprises a valve body shell 1, wherein a screw 4 is arranged in the valve body shell 1 along the axis direction of the valve body shell, a valve rod 7 is arranged in the valve body shell 1 along the radial direction of the valve body shell, the screw 4 is connected to the valve rod 7 through a bevel gear reducer 6, and the bevel gear reducer 6 is fixedly connected in the valve body shell 1; the screw 4 is sleeved with a nut seat 8 in threaded fit with the screw, one side of the nut seat 8 is provided with a sliding sleeve 3, the outer side of the sliding sleeve 3 is sleeved with a sleeve 2 in sliding fit with the sliding sleeve, the sleeve 2 is fixed on the valve body shell 1, and a limiting part for preventing the sliding sleeve 3 from rotating is arranged on the sleeve 2.

When the channel of the pipeline is closed, the rotary valve rod 7 rotates, the valve rod 7 drives the bevel gear reducer 6 to link, the bevel gear reducer 6 drives the screw 4 to rotate, the sliding sleeve 3 is driven to move leftwards in the rotating process of the screw 4, the sliding sleeve 3 and the sleeve 2 are completely overlapped, the overflow hole 21 on the sleeve 2 is completely sealed, and the gas stops flowing.

When the channel of the pipeline is opened, the valve rod 7 rotates in the opposite direction, the valve rod 7 drives the bevel gear reducer 6 to link, the bevel gear reducer 6 drives the screw 4 to rotate in the opposite direction, the sliding sleeve 3 is driven to move rightwards in the rotating process of the screw 4, the sliding sleeve 3 and the sleeve 2 are gradually staggered, the overflowing hole 21 on the sleeve 2 is gradually opened, and the air flows.

In the use process, after entering the inside through the water inlet channel of the valve body shell 1, the gas is discharged through the overflow hole 21 formed in the sleeve 2; therefore, in order to control the size of the overflow hole 21 on the sleeve 2, the sliding sleeve 3 moves in the sleeve 2 in a left-right moving manner, and after the sliding sleeve 3 is pushed to move on the sleeve 2 to the drainage end and pass through the overflow hole 21 on the sleeve 2, the channel of the overflow hole 21 can be closed; secondly, in order to facilitate the left-right movement of the pushing sleeve 2, a pushing component for pushing the sleeve 2 to move along the axial direction of the valve body shell 1 is designed, and the specific pushing mode is as follows: when the valve rod 7 is pushed to rotate, the screw rod 4 connected with the bevel gear reducer 6 is driven to synchronously rotate, the nut seat 8 on the push screw rod 4 moves back and forth, in order to ensure that the nut seat 8 moves back and forth and the nut seat 8 cannot rotate along with the screw rod, the nut seat 8 is fixedly arranged on the sliding sleeve 3 through a fastener, and a limiting piece for horizontally sliding the sliding sleeve 3 is arranged on the sleeve 2, so that when the sliding sleeve 3 cannot rotate, the nut seat 8 fixed with the sliding sleeve 3 cannot rotate, and then the screw rod 4 rotates, the sliding sleeve 3 and the nut seat 8 are pushed to integrally move left and right synchronously, and then the opening size of the overflow hole 21 on the sleeve 2 is adjusted in the process of moving left and right of the sliding sleeve 3.

In some embodiments of the present utility model, a flange 9 is disposed between the valve body housing 1 and the sleeve 2, the flange 9 is fixedly connected to the valve body housing 1, and the flange 9 is seamlessly connected to the sleeve 2.

Example 2

As can be seen from fig. 3, based on the optimization made on the basis of the previous embodiment, a telescopic protection sleeve 5 is sleeved on the screw 4, one end of the telescopic protection sleeve 5 is fixedly connected to the sliding sleeve 3, the other end of the telescopic protection sleeve 5 is fixedly connected to the supporting seat, the screw 4 is protected, in order to ensure that gas cannot permeate into the telescopic protection sleeve 5, the two ends of the telescopic protection sleeve are connected to be subjected to seamless treatment to avoid gas from permeating into the telescopic protection sleeve 5, and a sealing gasket is added at the joint and then matched with a fastener for sealing treatment.

Then, in order to make the bevel gear reducer 6 better fixed on the inner wall of the valve body shell 1 through the supporting seat, the supporting seat is improved, the supporting seat comprises a central plate 10, at least one reinforcing plate 11 is arranged on the central plate 10, three reinforcing plates 11 are arranged on the central plate 10 for supporting the central plate 10, the three reinforcing plates 11 are fixedly connected with the central plate 10 along the circumferential array distribution mode of the central plate 10, the central plate 10 is positioned on the central axis of the valve body shell 1, the other ends of the three reinforcing plates 11 are fixedly connected on the inner wall of the valve body shell 1, or the connection between the central plate 10 and the reinforcing plates 11 and the inner wall of the valve body shell 1 of the reinforcing plates 11 can be fixed through welding; in order to reduce the impact of the gas on the bevel gear reducer 6, a protective cover 12 is therefore provided, which protective cover 12 is fixedly connected to the reinforcing plate 11; then, a plurality of overflow holes 21 are formed in the sleeve 2, and the overflow holes 21 are distributed on the side wall of the sleeve 2 in a circumferential array; finally, in order to limit the sliding sleeve 3 to rotate along with the screw, a specific limiting piece is designed to limit the sliding sleeve 3 to rotate, the limiting piece comprises a first guide plate 13 and a second guide plate 14, the first guide plate 13 and the second guide plate 14 are fixedly connected to the sleeve 2, a sliding block 15 capable of sliding along the axis direction of the screw 4 is arranged between the first guide plate 13 and the second guide plate 14, the sliding block 15 is fixed on the sliding sleeve 3, the nut, the sliding sleeve 3 and the sliding block 15 are pushed to move together by the subsequent screw, the sliding block 15 is limited to move left and right in a gap between the first guide plate 13 and the second guide plate 14, and the moving track of the sliding block 15 is limited to ensure the moving track of the sliding sleeve 3 connected with the sliding block.

In summary, the flow regulating valve controls the opening of the valve gas channel according to the forward and backward movement of the sliding sleeve 3 inside the valve body, so as to effectively control the gas flow rate, pressure and the like passing through the valve. The flow channel in the valve body is axisymmetric, when the valve is opened, gas is collected at the outlet, turbulent flow is not generated when fluid flows, and cavitation is effectively eliminated; when the valve body is fully closed, the gas flow is effectively prevented, zero leakage is achieved, and therefore upstream pressure transmission is avoided; secondly, the sliding sleeve 3 moves in the sleeve 2 to change the channel size of the overflow hole 21, the change of the flow passage area is realized by the linear motion of the sliding sleeve 3 along the axial direction of the pipeline, no matter where the sliding sleeve 3 is, the section in the valve cavity is always annular, the valve cavity is contracted towards the axis at the outlet, and the gas is guided to reversely collide and dissipate energy at the center of the valve port, so that cavitation bubbles are annihilated at the center, and the damage of cavitation possibly generated due to throttling to the valve body and the pipeline is avoided.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The flow regulating valve is characterized by comprising a valve body shell (1), wherein a screw rod (4) is arranged in the valve body shell (1) along the axis direction of the valve body shell, a valve rod (7) is arranged in the valve body shell (1) along the radial direction of the valve body shell, the screw rod (4) is connected to the valve rod (7) through a bevel gear reducer, and the bevel gear reducer is fixedly connected in the valve body shell (1);

the screw rod (4) is sleeved with a nut seat (8) in threaded fit with the screw rod, one side of the nut seat (8) is provided with a sliding sleeve (3), the outer side of the sliding sleeve (3) is sleeved with a sleeve (2) in sliding fit with the sliding sleeve, the sleeve (2) is fixed on the valve body shell (1), and a limiting part for preventing the sliding sleeve (3) from rotating is arranged on the sleeve (2).

2. A flow regulating valve according to claim 1, characterized in that the valve body housing (1) is fixedly connected with a flange (9).

3. The flow regulating valve according to claim 1, wherein the screw (4) is sleeved with a telescopic protective sleeve (5), one end of the telescopic protective sleeve (5) is in seamless connection with the sliding sleeve (3), and the other end of the telescopic protective sleeve (5) is in seamless connection with the supporting seat.

4. A flow regulating valve according to claim 1, characterized in that the bevel gear reducer is fixed on the inner wall of the valve body housing (1) by a support base, the support base comprises a central plate (10), at least one reinforcing plate (11) is mounted on the central plate (10), one end of the reinforcing plate (11) is fixedly connected on the inner wall of the valve body housing (1), and one end of the reinforcing plate (11) is fixedly connected on the central plate (10).

5. A flow regulating valve according to claim 4, characterized in that a protective cover (12) is arranged on one side of the bevel gear reducer, said protective cover (12) being fixedly connected to the reinforcing plate (11).

6. The flow regulating valve according to claim 1, wherein a plurality of flow through holes (21) are formed in the sleeve (2), and the flow through holes (21) are distributed on the side wall of the sleeve (2) in a circumferential array.

7. A flow regulating valve according to claim 1, characterized in that the limiting member comprises a first guide plate (13) and a second guide plate (14), the first guide plate (13) and the second guide plate (14) are fixedly connected to the sleeve (2), a sliding block (15) capable of sliding along the axial direction of the screw (4) is arranged between the first guide plate (13) and the second guide plate (14), and the sliding block (15) is fixed on the sliding sleeve (3).

8. A flow regulating valve according to claim 1, characterized in that the valve body housing (1) is provided with an actuator (16), the actuator (16) having a drive shaft, which drive shaft is connected to the valve stem (7).