CN201742791U - Low-pressure flow pressure regulator - Google Patents

Abstract

The utility model relates to a low-pressure flow pressure regulator, which is characterized in that it includes a hollow cylindrical shell, a deformation adjustment body, a circular inlet bracket and a circular outlet bracket; the deformation adjustment body includes a hollow and The positive prism brackets hollowed out on each side and an elastic rubber sleeve tightly fitted outside the positive prism brackets; the deformation adjusting body is supported inside the housing through the inlet bracket and the outlet bracket, which respectively form the adjustment outer cavity and the adjustment adjustment body with the housing and the outlet bracket. Inner cavity; there is a circular inflow port on the inlet bracket, and the diameter of the inflow port is between the diameters of the tangent circle and the circumscribed circle in the deformation adjustment body; there is a circular inflow port on the outlet bracket that has the same cross-sectional shape as the deformation adjustment body. regular polygon outlet. The utility model not only makes it more sensitive to the pressure change response, but also has higher adjustment precision in the range of low pressure (0.05-0.2MPa), and has simple structure and low price. The utility model can be widely used in the pressure regulation of low-pressure micro-irrigation branch pipes and capillary levels.

Description

A low pressure flow pressure regulator

technical field

The utility model relates to a flow pressure regulator, in particular to a low-pressure flow pressure regulator used for regulating the flow pressure of branch pipes and capillary levels in a micro-irrigation system, and belongs to the technical field of agricultural irrigation. the

Background technique

In the design of micro-irrigation projects, controlling the pressure variation in the micro-irrigation pipe network is the main means to improve the uniformity of micro-irrigation. It is a method commonly used at present to use flow pressure regulating equipment in the pipe network to improve the irrigation efficiency and ensure the safe operation of the system. The flow pressure regulator is one of the main pressure regulating equipment in the current micro irrigation system. Its main working principle is that when the inlet pressure changes, the flow cross-sectional area automatically increases or decreases according to the pressure change. , to keep the outlet pressure (or flow) stable within a certain range. the

At present, in the flow pressure regulator, the main deformation element that automatically changes the cross-sectional area of the flow is the compression spring. The spring deforms under the change of pressure, and drives the relevant mechanism to reduce or increase the cross-sectional area of the flow, so that the pressure (or flow) ) The trend of increasing or decreasing decreases, and the pressure (or flow) downstream of the regulator remains stable within a certain range. Another method is to change the size of the flow section by changing the shape of the non-metallic elastic body inside the flow pressure regulator, so that the pressure (or flow) at the outlet of the regulator remains stable within a certain range. the

At present, under the development trend of micro-irrigation towards low energy consumption and low pressure, the working pressure range of the branch pipe and capillary level in the micro-irrigation pipe network is generally between 0.05-0.2Mpa, and the working pressure of some capillary pipes even works at a water head of several meters. The pressure adjustment range of the traditional flow pressure adjustment device is basically above 0.2Mpa, and the structure is complex and the price is relatively high. Therefore, the traditional flow pressure regulator can no longer meet the requirements of the development of micro-irrigation technology in this pressure range. the

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a low-pressure flow pressure regulator that can realize flow pressure regulation in a low pressure range, and has a relatively simple structure and high adjustment accuracy. the

In order to achieve the above purpose, the utility model adopts the following technical solutions: a low-pressure flow pressure regulator, characterized in that it includes a hollow cylindrical shell, a deformation adjustment body, a circular inlet bracket and a circular outlet Bracket; the deformation adjusting body includes a hollow regular prism bracket with each side hollowed out and an elastic rubber sleeve tightly sleeved on the outside of the regular prism bracket; the deformation adjusting body is supported by the inlet bracket and the outlet bracket on the The interior of the housing, which respectively forms an adjustment outer cavity and an adjustment inner cavity with the housing and the outlet bracket; a circular inlet is provided on the inlet bracket, and the diameter of the inlet is between the deformation adjustment Between the diameters of the inscribed circle and the circumscribed circle; the outlet bracket is provided with a regular polygonal outflow opening with the same cross-sectional shape as the inner cavity of the deformation regulating body. the

There are several grooves on the inner side of the inlet bracket, and the shapes formed by the several grooves are the same as the cross-sectional shape of the deformation regulating body, and one end of the deformation regulating body is embedded in the several grooves . the

A regular polygonal groove having the same cross-sectional shape as the deformation regulating body is defined inside the outlet bracket, and the other end of the deformation regulating body is embedded in the groove. the

Due to the adoption of the above technical scheme, the utility model has the following advantages: the deformation regulating body of the utility model is composed of a hollow positive prism support with hollowed out sides and an elastic rubber sleeve tightly sleeved outside the positive prism support, which not only makes it It is more sensitive to pressure changes, and has higher adjustment accuracy in the low pressure range (0.05-0.2Mpa), and has a simple structure and low price. The utility model can be widely used in the pressure regulation of low-pressure micro-irrigation branch pipes and capillary levels. the

Description of drawings

Fig. 1 is a structural representation of the utility model

Figure 2 is the A-direction view of Figure 1

Figure 3 is a view from direction B of Figure 1

Figure 4 is a sectional view of C-C in Figure 1

Figure 5 is a D-D sectional view of Figure 1

Fig. 6 is the structural representation of the utility model positive triangular stent

Fig. 7 is a structural schematic diagram of the utility model inlet bracket

Figure 8 is a schematic structural view of the utility model outlet bracket

Fig. 9 is a sectional view of A-A of Fig. 7

Figure 10 is a sectional view of A-A of Figure 8

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail. the

As shown in FIGS. 1-6 , the utility model includes a hollow cylindrical shell 1 , a deformation regulating body 2 , a circular inlet bracket 3 and a circular outlet bracket 4 . The deformation adjusting body 1 includes a hollow regular triangular prism support 11 with three sides hollowed out, and an elastic rubber sleeve 12 tightly sleeved on the outside of the support 11 . The deformation adjusting body 2 is supported inside the casing 1 by the inlet bracket 3 and the outlet bracket 4, which together with the casing 1 and the outlet bracket 4 form an adjustment outer cavity 5 and an adjustment inner cavity 6 respectively. the

As shown in FIG. 7 and FIG. 9 , a circular inlet 31 is provided on the inlet bracket 3 , and the diameter of the inlet 31 is between the diameters of the inscribed circle and the circumscribed circle of the deformation adjusting body 2 . Three triangular grooves 32 are formed inside the inlet bracket 3 , and the shape of the three grooves 32 is the same as the cross-sectional shape of the deformation adjusting body 2 , so that one end of the deformation adjusting body 2 can be inserted into the three grooves 32 . the

As shown in Fig. 8 and Fig. 10, an equilateral triangle outlet 41 with the same shape as the inner chamber cross-section of the deformation regulating body 2 is provided on the outlet bracket 4, and a cross-section similar to that of the deformation regulating body 2 is provided on the inner side of the outlet bracket 4. An equilateral triangular groove 42 with the same shape, so that the other end of the deformation adjusting body 2 can be embedded in the groove 42 . the

In the above embodiments, the bracket 11 may also be a regular quadrangular prism or a regular pentagonal prism. the

The working principle of the utility model is that the water flow enters the regulating outer cavity 5 and the regulating inner cavity 6 through the inlet bracket 3 and flows out through the outlet bracket 4 . When the pressure difference between the inlet and the outlet increases, the water flow in the inner chamber 6 is adjusted to increase, and the flow rate increases. According to the relevant principles of hydraulics, the pressure in the inner chamber 6 is adjusted to decrease, and the pressure in the outer chamber 5 is adjusted at the same time. increase, the pressure difference between the adjustment outer cavity 5 and the adjustment inner cavity 6 increases, the inward deformation of the deformation adjustment body 2 increases, the flow passage area of the water flow decreases, the head loss increases, and the pressure or flow rate at the outlet Decrease, so that the flow pressure of the outlet of the utility model remains basically unchanged. If the inlet pressure decreases, the above-mentioned deformation process is reversed, and the flow pressure at the outlet of the utility model remains basically unchanged. the

The utility model is only described with the above-mentioned embodiment, and the structure, setting position, and connection of each component can be changed. Improvements and equivalent transformations should not be excluded from the protection scope of the present utility model. the

Claims (3)

1. A low-pressure flow pressure regulator is characterized in that: it comprises a hollow cylindrical housing, a deformation regulating body, a circular inlet support and a circular outlet support; the deformation regulating body comprises a hollow and A regular prism bracket hollowed out on each side and an elastic rubber sleeve tightly sleeved on the outside of the regular prism bracket; The body and the outlet bracket form an adjustment outer cavity and an adjustment inner cavity; a circular inlet is provided on the inlet bracket, and the diameter of the inlet is between the diameters of the tangent circle and the circumscribed circle in the deformation adjustment body; A regular polygonal outflow opening with the same cross-sectional shape as the inner cavity of the deformation adjusting body is provided on the outlet bracket. 2. A low-pressure flow pressure regulator according to claim 1, characterized in that: there are several grooves on the inside of the inlet bracket, and the shape formed by the several grooves is the same as that of the deformation regulating body. The cross-sectional shapes are the same, and one end of the deformation regulating body is embedded in the plurality of grooves. 3. A low-pressure flow pressure regulator as claimed in claim 1, characterized in that: the inside of the outlet bracket is provided with a regular polygonal groove having the same cross-sectional shape as the deformation regulating body, and the deformation regulating body The other end is embedded in the groove. the

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