CN219549703U - Constant flow automatic regulating valve - Google Patents

Abstract

The utility model provides a constant flow automatic regulating valve, includes the valve body, along fluid flow direction sliding connection flow control body in the valve body, be equipped with fluid inlet, fluid stress surface, axial overflow hole and radial overflow hole on the flow control body respectively, the valve body import is through axial overflow hole and radial overflow hole communicating with each other with the valve body inner chamber respectively, set up in the valve body and can exert the elastic component with flow direction opposite effort's elastic component, set up the static compression volume adjustment mechanism of elastic component in the valve body, make the flow control body slide forward and then make radial overflow hole's area diminish through fluid stress surface when the flow increases, make the flow control body slide backward and then make radial overflow hole's area grow through elastic component compression force when the flow reduces to realize the automatic regulation of pipeline fluid constant flow. The utility model has simple structure, low cost, large flow, no overflow, small flow, no cavitation and wide application range.

Description

Constant flow automatic regulating valve

Technical Field

The utility model relates to an automatic regulating valve for constant-flow water supply, which is mainly arranged at the water inlet end of a main drainage pump, can realize constant-flow water supply, ensures that cavitation is not generated, and improves the efficiency of the main drainage pump.

Background

The water supply and drainage system of the water pump is widely applied, is closely related to industrial and agricultural production and people life, and is an electromechanical product which covers social aspects in a large scale.

The efficiency of the water pump is generally low, and mainly has two reasons, namely, the water pump is used for supplying water at negative pressure in a vacuumizing mode, so that the problem of serious cavitation exists; secondly, the front end of the main drainage pump is provided with a water feeding pump to ensure that the water pump supplies water in positive pressure, so that the problem of flow attenuation in the water supply engineering exists, and cavitation phenomenon can occur once the flow attenuation is serious.

The necessary cavitation allowance of the water pump is an expression of the performance parameter of the pump, which represents the performance of the pump and determines the suction height of the water pump. Once the flow, lift, motor speed of the water pump is determined, its necessary cavitation margin is determined. Most water pumps are arranged on a pump house bottom plate near a water absorbing well, a vacuum pumping device is used for forming negative pressure in a pump body, then liquid enters the pump body under the action of atmospheric pressure, the water pumps start to operate, the liquid is conveyed to a set place or height, the water pumps are used for supplying water at negative pressure, and high water level starting and low water level stopping are realized. Although there are definite parameters on the nameplate of the water pump, the flow, lift, power and efficiency values of the water pump are dynamically changed in practice, and the fact can be demonstrated through the performance curve chart of the water pump. The efficiency of the design point of the water pump is highest; the flow of the large flow point is increased, the lift is reduced, the shaft power is increased, and the efficiency is reduced; the flow of the small flow point is reduced, the lift is increased, and the efficiency is reduced. For convenience, drivers of pump rooms of enterprises often open the water outlet end regulating valves of the water pump to enable the water pump to run at a flow larger than a large flow point, so that the necessary cavitation allowance of the water pump is continuously increased, namely the suction stroke is reduced, and as a result, the cavitation phenomenon of the water pump is serious, the water discharge speed is slowed down and the pump efficiency is reduced too much.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides the constant flow automatic regulating valve.

The technical scheme of the utility model is as follows: the utility model provides a constant flow automatic regulating valve, includes the valve body, and its special character is: the valve body is internally provided with an elastic element which can apply acting force opposite to the flow direction to the flow regulator, the valve body is internally provided with an elastic element static compression amount regulating mechanism, when the flow is increased, the flow regulator is forced to slide forwards through the fluid stress surface so as to reduce the area of the radial overflow hole, and when the flow is reduced, the flow regulator is enabled to slide backwards under the action of the compression force of the elastic element so as to enlarge the area of the radial overflow hole, thereby realizing the automatic regulation of the constant flow of the pipeline fluid.

Further, the elastic element comprises a spring supporting surface arranged at the center of the bottom surface of the flow regulating sliding body, a flow regulating guide rod penetrating through the flow regulating body, a spring pressure plate arranged in the valve body and fixedly connected with the top end of the flow regulating guide rod, and a pressure spring arranged on the flow regulating guide rod and positioned between the spring pressure plate and the spring supporting surface.

Further, a guide sleeve is arranged in the inner cavity of the valve body, an annular limiting surface is arranged at the position, corresponding to the flow regulator, of the inner wall of the inlet of the valve body, the flow regulator is in sliding fit with the guide sleeve, and the flow regulator is arranged on the annular limiting surface.

Further, the elastic element static compression amount adjusting mechanism comprises a flow adjusting rod arranged on the upper portion of the valve body, a positive and negative bidirectional screw rod sleeved and fixed on the flow adjusting rod, a threaded sleeve arranged on the positive and negative bidirectional screw rod, and a flow adjusting connecting rod hinged between the threaded sleeve and the spring pressure plate, wherein the flow adjusting rod is in rotary connection with the valve body. The distance between the threaded sleeves on the positive and negative bidirectional screw rod can be increased or decreased by adjusting the flow adjusting rod, so that the spring pressure plate moves upwards or descends, and the requirement of setting or fine adjusting the pressure value of the pipeline can be met.

Further, a guide rod limiting hole is formed in the center of the spring supporting surface, the axial overflow hole is located in the axis of the valve body, and the flow adjusting guide rod passes through the axial overflow hole and the guide rod limiting hole.

Further, a positioning hole is formed in the valve body corresponding to the insertion end of the flow regulating rod, the insertion end of the flow regulating rod is located in the positioning hole, and a sealing gland is mounted on the surface of the valve body corresponding to the extraction end of the flow regulating rod.

Further, the axial flow holes and the radial flow holes are respectively four.

Further, the guide sleeve is arranged on the inner wall of the valve body through a rib plate.

Further, the forward and reverse bidirectional screw rod and the flow regulating rod are integrated.

Further, the fluid inlet is petal-shaped.

The beneficial effects of the utility model are as follows: before the water pump operates, the distance between the two thread sleeves is changed through the flow adjusting rod, so that the height of the spring pressure plate, namely the static compression amount of the spring, is adjusted, the requirement of setting or fine-adjusting the pressure value of the pipeline is met, and the constant flow setting of the pipeline is realized. When the water pump operates, fluid flows through the axial flow hole and the radial flow hole of the flow regulator at the same time, and the fluid forms certain pressure in the pipeline, and the pressure acts on the fluid stress surface of the flow regulator at any moment. When the flow rate of the pipeline is increased (the pressure is increased), the pressure acting on the fluid stress surface is increased, so that the flow regulator slides forwards along the fluid flow direction, the radial overflow hole part is blocked, the radial overflow hole area is reduced, and the flow rate of the pipeline is reduced; on the contrary, when the flow of the pipeline is reduced (the pressure is reduced), the flow regulator is enabled to slide backwards along the flowing direction of the flowing fluid under the action of the pressure of the elastic element, the area of the radial overflow hole is enlarged, and the flow of the pipeline is increased, so that the automatic regulation of the constant flow of the fluid is realized, the high flow is not over-flowing, and the small flow is not cavitation. The utility model has simple structure and low cost, completely adjusts the flow by self mechanical structure, can realize large-flow constant-flow water supply and has wide application range.

Drawings

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

FIG. 2 is a schematic structural view of a flow regulator;

fig. 3 is a cross-sectional view A-A of fig. 2.

In the figure: the device comprises a threaded sleeve-1, a forward and reverse bidirectional screw rod-2, a flow adjusting rod-3, a flow adjusting connecting rod-4, a spring pressure plate-5, a pin roll-6, a valve body-7, a guide sleeve-8, a flow adjusting body-9, a radial overflow hole-10, an axial overflow hole-11, a flow adjusting guide rod-12, a spring-13, a rib plate-14, a sealing gland-15, a sealing rubber ring-16, a valve body inlet-701, an annular limiting surface-702, a partition wall-703, a positioning hole-704, a valve body outlet-705, a fluid bearing surface-901, a spring supporting surface-902, a fluid inlet-903 and a guide rod limiting hole-902 a.

Detailed Description

As shown in the figure, the constant flow automatic regulating valve comprises a valve body 7, a valve body inlet 701 and a valve body outlet 705, wherein the valve body 7 is internally and slidably connected with a flow regulating body 9 along the flow direction of fluid, a petal-shaped fluid inlet 903 is arranged at the bottom of the flow regulating body 9, a fluid bearing surface 901, an axial flow through hole 11 and a radial flow through hole 10 are respectively arranged on the flow regulating body 9, the valve body inlet 701 is respectively communicated with an inner cavity of the valve body 7 through the axial flow through hole 11 and the radial flow through hole 10, an elastic element capable of applying a force opposite to the flow direction of fluid is arranged in the valve body 7, an elastic element static compression amount regulating mechanism is arranged in the valve body, when the flow is increased, the flow regulating body is enabled to slide forwards through the force of the fluid bearing surface so as to enable the area of the radial flow through hole to be reduced, and the area of the radial flow through hole to be enabled to be increased through the backward under the compression force of the elastic element when the flow is reduced, so that the constant flow of the pipeline fluid is automatically regulated.

The elastic element comprises a spring supporting surface 902 arranged at the center of the bottom surface of the flow regulating sliding body 9, a flow regulating guide rod 12 penetrating through the flow regulating body 9, a spring pressure plate 5 arranged in the valve body 7 and fixedly connected with the top end of the flow regulating guide rod 12, and a spring 13 arranged on the flow regulating guide rod 12 and positioned between the spring pressure plate 5 and the spring supporting surface 902.

The guide sleeve 8 is arranged on the inner wall of the inner cavity of the valve body 7 through a rib plate 14, an annular limiting surface 702 is arranged on the inner wall of the inlet of the valve body 7 corresponding to the position of the flow regulator 9, the flow regulator 9 is in sliding fit with the guide sleeve 8, the flow regulator 9 is arranged on the annular limiting surface 702, and a partition wall 703 is arranged at the transition part of the inlet of the valve body and the inner cavity of the valve body.

The elastic element static compression amount adjusting mechanism comprises a flow adjusting rod 3 arranged on the upper portion of a valve body 8, a positive and negative bidirectional screw rod 2 sleeved and fixed on the flow adjusting rod 3, a threaded sleeve 1 arranged on the positive and negative bidirectional screw rod 2, and a flow adjusting connecting rod 4 hinged between the threaded sleeve 1 and a spring pressure plate 5 through a pin shaft 6, wherein the flow adjusting rod 3 is rotationally connected with the valve body 7. The distance between the threaded sleeves on the positive and negative bidirectional screw rod can be increased or decreased by adjusting the flow adjusting rod, so that the spring pressure plate moves upwards or descends, and the requirement of setting or fine adjusting the pressure value of the pipeline can be met.

The center of the spring supporting surface 902 is provided with a guide rod limiting hole 902a, the axial overflow hole 11 is positioned at the axis of the valve body 7, and the flow adjusting guide rod 12 passes through the axial overflow hole 11 and the guide rod limiting hole 902a.

The valve body 7 is provided with a positioning hole 704 corresponding to the insertion end of the flow regulating rod 3, the insertion end of the flow regulating rod 3 is positioned in the positioning hole 704, a sealing gland 15 is arranged on the surface of the valve body 7 corresponding to the extraction end of the flow regulating rod 3, and a sealing rubber ring 16 is arranged between the sealing gland 15 and the flow regulating rod 3.

The number of the axial flow holes 11 and the radial flow holes 10 is four.

The forward and reverse bidirectional screw rod 2 and the flow regulating rod 3 can be integrated.

The above is only a specific 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 (10)

1. The utility model provides a constant flow automatic regulating valve, includes the valve body, characterized by: the valve body is internally provided with an elastic element which can apply acting force opposite to the flow direction to the flow regulator, the valve body is internally provided with an elastic element static compression amount regulating mechanism, when the flow is increased, the flow regulator is forced to slide forwards through the fluid stress surface so as to reduce the area of the radial overflow hole, and when the flow is reduced, the flow regulator is enabled to slide backwards under the action of the compression force of the elastic element so as to enlarge the area of the radial overflow hole, thereby realizing the automatic regulation of the constant flow of the pipeline fluid.

2. The constant flow automatic regulating valve according to claim 1, wherein: the elastic element comprises a spring supporting surface arranged at the center of the bottom surface of the flow regulating sliding body, a flow regulating guide rod penetrating through the flow regulating body, a spring pressure plate arranged in the valve body and fixedly connected with the top end of the flow regulating guide rod, and a pressure spring arranged on the flow regulating guide rod and positioned between the spring pressure plate and the spring supporting surface.

3. The constant flow automatic regulating valve according to claim 1, wherein: the guide sleeve is arranged in the inner cavity of the valve body, an annular limiting surface is arranged at the position, corresponding to the flow regulator, of the inner wall of the inlet of the valve body, the flow regulator is in sliding fit with the guide sleeve, and the flow regulator is arranged on the annular limiting surface.

4. The constant flow automatic regulating valve according to claim 1, wherein: the elastic element static compression amount adjusting mechanism comprises a flow adjusting rod arranged on the upper portion of the valve body, a positive and negative bidirectional screw rod sleeved and fixed on the flow adjusting rod, a threaded sleeve arranged on the positive and negative bidirectional screw rod, and a flow adjusting connecting rod hinged between the threaded sleeve and the spring pressure plate, wherein the flow adjusting rod is in rotary connection with the valve body.

5. The constant flow automatic regulating valve according to claim 2, characterized in that: the center of the spring supporting surface is provided with a guide rod limiting hole, the axial overflow hole is positioned at the axis of the valve body, and the flow adjusting guide rod passes through the axial overflow hole and the guide rod limiting hole.

6. The constant flow automatic regulating valve according to claim 4, wherein: the valve body is provided with a positioning hole corresponding to the insertion end of the flow regulating rod, the insertion end of the flow regulating rod is positioned in the positioning hole, and the surface of the valve body is provided with a sealing gland corresponding to the extraction end of the flow regulating rod.

7. The constant flow automatic regulating valve according to claim 1, wherein: the number of the axial overflow holes and the radial overflow holes are four respectively.

8. A constant flow automatic regulating valve according to claim 3, characterized in that: the guide sleeve is arranged on the inner wall of the valve body through the rib plate.

9. The constant flow automatic regulating valve according to claim 4, wherein: the positive and negative bidirectional screw rod and the flow regulating rod are integrated.

10. The constant flow automatic regulating valve according to claim 1, wherein: the fluid inlet is petal-shaped.