Flow regulating valve

Abstract

The application relates to the technical field of agricultural irrigation water treatment, and discloses a flow regulating valve which comprises a valve seat, a valve shell, a valve core and an elastic diaphragm, the valve seat is provided with a left-right through flow hole, a cylindrical valve core is sealingly connected to the left side of the valve seat corresponding to the position of the flow hole, a plurality of openings are arranged on the valve core wall in a circumferential direction, an elastic diaphragm is sealingly wrapped on the outer side of the valve core corresponding to the positions of the openings, a water passing inner cavity which is left-right through and sealingly communicated with the flow hole is formed between the elastic diaphragm and the valve core, the valve shell is sleeved on the outer side of the valve core and sealingly connected to the valve seat at the left end, and an adjusting outer cavity which is closed at the left end and opened at the right end is formed between the valve shell, the valve seat, the valve core and the elastic diaphragm. The application has a reasonable structure, the water passing section area of the water passing inner cavity can be adjusted according to the water head, so that the flow rate is relatively stable, the whole device is controlled by hydraulic self-driving, no manual cost or electric energy consumption is needed during operation, and the operation cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural irrigation water treatment, and is a flow regulating valve. BACKGROUND

[0002] Drip irrigation is one of the advanced techniques of efficient water use and precise irrigation in agricultural water-saving projects. The system structure mainly consists of main pipes, branch pipes, drip irrigation belts and various valves. In the irrigation process, in order to make the drip irrigation belt have a relatively stable flow within a certain range, it is necessary to use a flow regulating valve to eliminate the flow changes caused by water head fluctuations in the pipeline. At present, such flow regulating valves are basically manually controlled or electrically controlled, and the operation cost is high.

[0003] A multifunctional large-flow pressure reducing valve for irrigation is disclosed in Chinese Patent No. CN104864143B, which comprises a valve body, a support plate, a valve stem, a valve core, a valve cover, a base and an open and close valve. The valve body is a straight-through cylindrical structure, one end of which is a water inlet end and the other end is a water outlet end. An upper and lower opening is respectively arranged on the middle part of the valve body. The pipe wall of the lower opening extends outward by a distance to form a circular ring opening with a flat bottom. The inner wall of the circular ring opening is provided with threads. The pipe wall of the upper opening extends outward by a distance to form a circular ring opening with a flat top. The inner diameter of the extended section of the upper opening is increased at two places to form first and second steps, i.e. the upper opening contains three sections with different inner diameters along the axial direction. The end of the extended section of the upper opening expands in the radial direction of the outer wall to form a square plate. A drill hole is arranged at each corner of the square plate near the edge. The pressure reducing valve needs to be manually controlled, resulting in high labor cost during operation. SUMMARY

[0004] The present application provides a flow regulating valve, which overcomes the shortcomings of the prior art and effectively solves the problem of high operation cost of the flow regulating valve in the existing irrigation system.

[0005] The technical scheme of the present application is realized by the following measures: a flow regulating valve, comprising a valve seat, a valve shell, a valve core and an elastic diaphragm. A left-right through flow hole is arranged on the valve seat. A cylindrical valve core is sealingly connected to the left side of the valve seat corresponding to the position of the flow hole. A plurality of openings are arranged on the wall of the valve core in a circumferential direction. An elastic diaphragm is sealingly wrapped around the outer side of the valve core corresponding to the positions of the plurality of openings. A water passing inner cavity that is left-right through and sealingly communicated with the flow hole is formed between the elastic diaphragm and the valve core. The valve shell is sleeved on the outer side of the valve core and sealingly connected to the left end of the valve seat. An adjusting outer cavity that is closed at the left end and open at the right end is formed between the valve shell, the valve seat, the valve core and the elastic diaphragm.

[0006] The following is a further optimization or / and improvement of the above-mentioned application scheme:

[0007] The right side of the valve seat corresponding to the over-flow hole position is sealedly communicated with a first water passing pipeline, a bypass pipeline is arranged on the valve shell and communicated with the adjusting outer cavity at one end, the other end of the bypass pipeline is fixedly communicated with the first water passing pipeline, and a control valve is arranged on the bypass pipeline.

[0008] The control valve can be a manual ball valve.

[0009] A radial partition plate is fixedly connected to the inner side wall of the valve core corresponding to the position between every two adjacent openings, a core shaft is arranged in the middle part of the valve core, the inner end of the radial partition plate is fixedly connected with the core shaft, and the radial partition plate and the core shaft divide the water passing inner cavity into a plurality of independent water passing flow channels.

[0010] An outer ring groove is arranged on the outer side wall of the valve core, and the elastic diaphragm is arranged in the outer ring groove, wherein the thickness of the elastic diaphragm is equal to or less than the depth of the outer ring groove.

[0011] The valve seat can be a flange structure, the over-flow hole is a central hole of the flange, and the left end of the valve core is fixedly arranged in the central hole of the flange.

[0012] The valve shell can include a connecting flange and a second water passing pipeline, the connecting flange is sealingly connected with the valve seat, and the second water passing pipeline is sealingly connected with the connecting flange.

[0013] The present application has reasonable structure and ingenious design, the water passing section area of the water passing inner cavity can be adjusted according to the water head, so that the flow rate is relatively stable, the whole device is controlled by hydraulic self-driving, no manual cost or electric energy consumption is needed during operation, and the operation cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is a front view of the structure of the embodiment one of the present application. Figure 1 FIG. 2 is a sectional view of the structure along the line A-A of the embodiment one of the present application.

[0015] FIG. 3 is a perspective view of the embodiment one of the present application. Figure 2 FIG. 4 is a perspective view of the valve seat, the valve core and the elastic diaphragm in the embodiment one of the present application. Figure 1 FIG. 5 is a perspective view of the valve core and the elastic diaphragm in the embodiment one of the present application.

[0016] FIG. 6 is a perspective view of the valve core in the embodiment one of the present application. Figure 3 FIG. 7 is a sectional view of the structure along the line A-A of the embodiment two of the present application.

[0017] FIG. 8 is a sectional view of the structure along the line A-A of the embodiment three of the present application. Figure 4 FIG. 9 is a sectional view of the structure along the line A-A of the embodiment four of the present application.

[0018] FIG. 10 is a sectional view of the structure along the line A-A of the embodiment five of the present application. Figure 5 FIG. 11 is a sectional view of the structure along the line A-A of the embodiment six of the present application.

[0019] FIG. 12 is a sectional view of the structure along the line A-A of the embodiment seven of the present application. Figure 6 FIG. 13 is a sectional view of the structure along the line A-A of the embodiment eight of the present application.

[0020] FIG. 14 is a sectional view of the structure along the line A-A of the embodiment nine of the present application. Figure 7This is a right-side view of the valve core structure in Embodiment 1 of the present invention.

[0021] Appendix Figure 8 This is a cross-sectional view of the structure of the elastic diaphragm when it is deformed inward by inward compression according to Embodiment 1 of the present invention.

[0022] Appendix Figure 9 This is a schematic diagram of a partial cross-sectional view of the main view structure of Embodiment 2 of the present invention.

[0023] Appendix Figure 10 This is a graph showing the flow rate response to changes in head in Embodiment 2 of the present invention.

[0024] The codes in the attached diagram are as follows: 1 is valve seat, 2 is valve core, 3 is elastic diaphragm, 4 is flow hole, 5 is opening, 6 is water passage inner cavity, 7 is regulating outer cavity, 8 is radial partition, 9 is mandrel, 10 is outer annular groove, 11 is first water passage pipe, 12 is bypass pipe, 13 is control valve, 14 is connecting flange, and 15 is second water passage pipe. Detailed Implementation

[0025] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0026] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0027] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0028] Example 1: As shown in the attached document Figures 1-8 As shown, the flow regulating valve includes a valve seat 1, a valve body, a valve core 2, and an elastic diaphragm 3. The valve seat 1 is provided with a through-hole 4 that runs horizontally. A cylindrical valve core 2 is sealed and connected to the left side of the valve seat 1 corresponding to the position of the through-hole 4. Several openings 5 ​​are spaced apart circumferentially on the wall of the valve core 2. An elastic diaphragm 3 is sealed and wrapped around the outside of the valve core 2 corresponding to the positions of the several openings 5. The elastic diaphragm 3 and the valve core 2 form a water passage cavity 6 that runs horizontally and is sealed and connected to the through-hole 4. The valve body is fitted on the outside of the valve core 2 and the left end of the valve body is sealed and connected to the valve seat 1. The valve body, valve seat 1, valve core 2, and elastic diaphragm 3 form an regulating outer cavity 7 that is closed at the left end and open at the right end 5.

[0029] According to the needs, four openings 5 are evenly arranged on the wall of the valve core 2 in the circumferential direction. In use, the flow regulating valve is installed in the pipeline of the irrigation system. The fluid flows through the flow regulating valve from right to left through the water passing inner cavity 6. When the fluid flow in the pipeline is lower than a certain value, the elastic diaphragm 3 does not deform, that is, the water passing section area of the water passing inner cavity 6 does not change. When the fluid flow in the pipeline is larger, the water volume V1 in the adjusting outer cavity 7 increases, the water pressure in the adjusting outer cavity 7 increases, the water body in the adjusting outer cavity 7 generates an inward force F1 to the elastic diaphragm 3, which causes the elastic diaphragm 3 at the position of the opening 5 to be inwardly pressed and deformed, and the water passing section area A2 of the water passing inner cavity 6 decreases. Specifically, when the flow regulating valve is in a certain working water head range, when the flow increases, the water body in the adjusting outer cavity 7 generates an inward force F1 to the elastic diaphragm 3, which increases, the deformation of the elastic diaphragm 3 increases, and thus the water passing section area A2 of the water passing inner cavity 6 decreases; when the flow decreases, the water body in the adjusting outer cavity 7 generates an inward force F1 to the elastic diaphragm 3, which decreases, the deformation of the elastic diaphragm 3 decreases, and thus the water passing section area A2 of the water passing inner cavity 6 increases, that is, the elastic diaphragm 3 continuously adjusts the size of the water passing section area A2 of the water passing inner cavity 6 according to the change of the force F1, thereby realizing the relative stability (small fluctuation) of the flow value Q of the device within a certain water head range, thereby ensuring that the outlet of the drip irrigation tape has a relatively stable flow within a certain range, avoiding waste of water resources, and compared with the existing manually controlled or electrically driven flow regulating valve, the application is hydraulically self-driven, has no labor cost or power consumption during operation, and has low operation cost.

[0030] According to actual needs, the above embodiment one can be further optimized or / and improved:

[0031] As shown in the accompanying drawings, Figures 4-7 A radial baffle plate 8 is fixedly connected to the inner side wall of the valve core 2 at the position between every two adjacent openings 5. A core shaft 9 is arranged in the middle of the valve core 2. The inner end of the radial baffle plate 8 is fixedly connected to the core shaft 9. The radial baffle plate 8 and the core shaft 9 divide the water passing inner cavity 6 into a plurality of independent water passing flow channels. Each radial baffle plate 8 is arranged along the radial direction of the valve core 2. In this embodiment, there are four openings 5 and four radial baffle plates 8. The four radial baffle plates 8 and the core shaft 9 divide the entire water passing inner cavity 6 into four independent water passing flow channels. Specifically, the valve core 2, the radial baffle plate 8 and the core shaft 9 are integrally arranged.

[0032] As shown in the accompanying drawings, Figure 6 An outer ring groove 10 is arranged on the outer side wall of the valve core 2. The elastic diaphragm 3 is located in the outer ring groove 10. The thickness of the elastic diaphragm 3 is equal to or less than the depth of the outer ring groove 10. The elastic diaphragm 3 is entirely located in the outer ring groove 10. The both ends of the elastic diaphragm 3 will not be relaxed or deviated due to the impact of the water body.

[0033] As shown in the accompanying drawings,Figures 1-4 As shown in the figure, the valve seat 1 is a flange structure, the through-flow hole 4 is a center hole of the flange, and the valve core 2 is fixedly installed at the left end of the center hole of the flange. Specifically, the left outer side of the valve core 2 is threadedly connected with the inner wall of the center hole of the flange, and the valve seat 1 is a flange structure, thereby facilitating the connection with the valve shell, the water outlet pipeline and the like.

[0034] As shown in the figure, Figures 1-3 As shown in the figure, the valve shell comprises a connecting flange 14 and a second water pipeline 15, the connecting flange 14 is sealingly connected with the valve seat 1, and the second water pipeline 15 is sealingly connected with the connecting flange 14. The connecting flange 14 facilitates the connection with the valve seat 1, and specifically, the inner wall of the center hole of the connecting flange 14 is threadedly connected with the left outer side of the second water pipeline 15.

[0035] Embodiment Two: The difference between this embodiment and Embodiment One is only that, as shown in the figure, Figure 9 As shown in the figure, the right side of the valve seat 1 corresponding to the position of the through-flow hole 4 is sealingly communicated with the first water pipeline 11, the valve shell is provided with a bypass pipeline 12 which is communicated at one end with the adjusting outer cavity 7, the other end of the bypass pipeline 12 is fixedly communicated with the first water pipeline 11, and the bypass pipeline 12 is provided with a control valve 13. Compared with Embodiment One, in this embodiment, the water in the adjusting outer cavity 7 will flow to the first water pipeline 11 through the bypass pipeline 12, so that when the control valve 13 is in different opening degrees, the through-flow value Q of the water passing through the water passing cavity 6 is also different under the condition that the working water head is unchanged, as shown in the figure. Figure 10 As shown in the figure, the curve 1 represents the relationship curve between the through-flow value Q and the working water head when the control valve is completely closed; the curve 2 represents the relationship curve between the through-flow value Q and the working water head when the control valve is in a half-open state; and the curve 3 represents the relationship curve between the through-flow value Q and the working water head when the control valve is in a fully open state. That is, through the arrangement of the bypass pipeline 12 and the control valve 13, it is ensured that the through-flow value Q is relatively stable when the water head fluctuates in a larger range, and in the opposite case, the through-flow value Q can be adjusted by adjusting the opening degree of the control valve 13 when the working water head is unchanged, thereby meeting the use requirements in different situations, having good flexibility and strong applicability. Specifically, the control valve 13 in this embodiment is a manual ball valve.

[0036] The above technical features constitute the best embodiment of the present application, have strong adaptability and best implementation effect, and can be increased or decreased according to actual needs to meet the requirements in different situations.

Claims

1. A flow regulating valve characterized by The valve comprises a valve seat, a valve shell, a valve core and an elastic diaphragm, the valve seat is provided with a left-right through flow hole, a cylindrical valve core is sealingly connected to the left side of the valve seat corresponding to the position of the flow hole, a plurality of openings are provided on the wall of the valve core and spaced apart in the circumferential direction, an elastic diaphragm is sealingly wrapped around the outer side of the valve core corresponding to the positions of the plurality of openings, a water passing inner cavity is formed between the elastic diaphragm and the valve core and is left-right through and sealingly communicated with the flow hole, the valve shell is sleeved on the outer side of the valve core and sealingly connected to the left end of the valve seat, an adjusting outer cavity is formed between the valve shell, the valve seat, the valve core and the elastic diaphragm and is closed at the left end and open at the right end, a first water passing pipeline is sealingly communicated with the right side of the valve seat corresponding to the position of the flow hole, a bypass pipeline is provided on the valve shell and communicated at one end with the adjusting outer cavity, the other end of the bypass pipeline is fixedly communicated with the first water passing pipeline, and a control valve is provided on the bypass pipeline.

2. The flow regulating valve of claim 1, wherein The control valve is a manual ball valve.

3. The flow regulating valve according to claim 1 or 2, characterized in that A radial baffle is fixedly connected to the inner side wall of the valve core corresponding to the position between every two adjacent openings, a core shaft is provided in the middle of the valve core, the inner end of the radial baffle is fixedly connected to the core shaft, and the radial baffle and the core shaft divide the water passing inner cavity into a plurality of independent water passing flow channels.

4. The flow regulating valve according to claim 1 or 2, characterized in that An outer ring groove is provided on the outer side wall of the valve core, the elastic diaphragm is located in the outer ring groove, and the thickness of the elastic diaphragm is equal to or less than the depth of the outer ring groove.

5. The flow regulating valve of claim 3, wherein An outer ring groove is provided on the outer side wall of the valve core, the elastic diaphragm is located in the outer ring groove, and the thickness of the elastic diaphragm is equal to or less than the depth of the outer ring groove.

6. The flow regulating valve according to claim 1 or 2 or 5, characterized in that The valve seat is a flange structure, the flow hole is a central hole of the flange, and the left end of the valve core is fixedly installed in the central hole of the flange.

7. The flow regulating valve of claim 6, wherein The valve shell comprises a connecting flange and a second water passing pipeline, the connecting flange is sealingly connected to the valve seat, and the second water passing pipeline is sealingly connected to the connecting flange.

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