KR20080004969A - Constant flow valve - Google Patents

Abstract

A constant flow valve is provided to save manufacturing cost and to improve a constant flow maintaining function by preventing a flow path whose cross-section is fixed from being formed. A constant flow valve comprises a valve body(100) and a cutting ring(130). The valve body includes an inner body(120) protruded in an axis direction inside an outer body(110), a fluid path and a separation prevention protrusion(121) protruded in a diameter direction from the inner body. The cutting ring made of an elastic material is engaged inward of the separation prevention protrusion of the inner body. In addition, the cutting ring whose cross-section is bigger in a diameter direction while being closely attached to a sawder due to pressure increase of fluid.

Description

Constant flow valve {CONSTANT FLOW VALVE}

1 is a cross-sectional view showing an example of a conventional constant flow valve

Figure 2 is a cross-sectional view showing another example of a conventional constant flow valve

Figure 3 is an exploded perspective view showing an embodiment of the constant flow valve according to the present invention

4 is a front view of the present invention flow rate valve shown in FIG.

5A and 5B are installed state diagrams of the fixed flow rate valve of the present invention shown in cross-sectional views along the A-A 'and B-B' directions of FIG. 4, respectively.

Figure 6 is a cross-sectional view showing another embodiment of the constant flow valve according to the present invention

<Description of the symbols for the main parts of the drawings>

100: valve body 110: outer body

111: groove 113: uneven portion

120: inner body 121: separation prevention protrusion

123: inclined surface 125: support protrusion

127: liver fat 130: blocking ring

140: sealing

The present invention relates to a constant flow valve, and more particularly, to a constant flow valve capable of maintaining a constant flow rate while having a simple structure having a low manufacturing cost.

In general, the constant flow valve reduces the cross-sectional area of the flow path as the flow rate of the fluid moving through the pipeline increases and maintains the flow rate to the rear end of the flow passage.It is operated by hydraulic pressure or a spring according to the size, flow rate and flow rate of the installation pipeline. There is a wide variety of types, from complex structures with valve bodies to simple structures with rubber-based variable barriers. Among these, the conventional constant flow valve of the simple structure used when the pipe inner diameter is relatively small, such as a water supply pipe of a boiler, is shown in FIG.

The constant flow valve shown in FIG. 1 has a valve body 3 and a variable passage in which a fixed passage 1 through which fluid is always passed in a central portion is formed, and a variable passage 5 is formed between the stems around the fixed passage 1. It consists of a rubber blocking plate (9) installed to block (5), the projection (7) is formed in the valve body (3) so that the blocking plate (9) and the valve body (3) to maintain a predetermined interval do. Such a constant flow valve has a merit that the blocking plate 9 is in close contact with the valve body 3 by the fluid pressure to reduce the flow passage cross-sectional area as the flow rate increases, and thus, the structure is relatively simple and the manufacturing cost is low.

However, since the variable flow valve has a structure in which the variable passage 5 is blocked by the blocking plate 9 which is easily deformed, and the fluid flows continuously through the fixed passage 1, the flow rate only slightly increases. Even if the variable passage (5) is suddenly blocked and the fluid flows through the fixed passage (1) without limiting the flow rate, there was a problem that the function of maintaining a constant flow rate is inferior.

As another example of the conventional hydrostatic valve, the conventional hydrostatic valve shown in FIG. 2 is provided with a shutoff body 13 in a housing 11 so as to be liftable, and a spring (3) below the shutoff body 13. 15 and the diaphragm 17 are installed, the pressure chamber 19 of the upper portion of the diaphragm 17 has a structure in communication with the inlet port 21 side of the housing (11). Accordingly, when the flow rate flowing into the housing 11 increases, the pressure applied to the diaphragm 17 through the pressure chamber 19 increases, so that the blocking body 13 lowers, and the blocking body 13 lowers. As a result, the flow path cross-sectional area is reduced to control the flow rate.

Since the flow rate cross-sectional area is reduced by an increase in flow rate according to the elastic modulus of the spring 15, the flow rate retention function is better than the valve shown in FIG. 1, but the structure is relatively complicated, and thus the manufacturing cost is high. There was a problem that durability is poor due to damage to the diaphragm 17 and the like.

The present invention is to solve the problems described above, to provide a constant flow valve having a simple structure and low manufacturing cost and excellent flow rate maintenance function.

According to the present invention for achieving the above object, the inner body protruding in the axial direction is formed inside the outer body made of a single tube form, the space between the outer body and the liver connecting the inner body is fluid communication path A valve body having a separation preventing protrusion protruding in a radial direction from the inner body; And a shutoff ring coupled to the inside of the inner body prevention prevention protrusion and made of an elastic material, the blocking ring having a radial cross-sectional area that is in close contact with the liver as the pressure of the fluid is applied thereto.

The flow rate valve of the present invention may have a structure in which a groove is formed on an outer circumferential surface of the valve body, and a seal is coupled to the groove to be inserted into a pipeline.

In addition, in some cases, the outer body extending in the longitudinal direction is provided with a pipe coupling portion is inserted and coupled to the pipe line may be made of a structure that is directly connected to the pipe line.

The inner body may have a support protrusion for supporting the inner circumferential surface of the blocking ring so as to be spaced apart from the inner body, and the inner circumferential surface of the outer body may have an uneven portion forming a fluid passage. Such support protrusions and uneven parts form a fluid passage therebetween, and are useful for reducing flow path resistance due to installation of the blocking ring.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view showing an embodiment of the flow rate valve according to the present invention in an exploded state, FIG. 4 is a front view thereof, and FIGS. 5A and 5B are cross-sectional views along AA 'and BB' directions of FIG. 4, respectively. It is an installation state figure of the constant flow valve of this invention shown.

As shown in FIGS. 3 and 4, the constant flow valve of the present invention has a simple structure in which a shutoff ring 130 is coupled to the inside of the valve body 100, and is illustrated in FIGS. 5A and 5B in the present embodiment. As illustrated, the configuration is configured to be inserted into the pipe 50.

The valve body 100 is formed in a substantially wheel shape, the inner body 120 is located in the inner center of the outer tube 110 in the form of a short tube, the inner peripheral surface of the outer body 110 and the outer peripheral surface of the inner body 120 A plurality of liver 127 has a structure connected to it.

The outer body 110 is to form the outer shape of the valve, when inserted into the interior of the conduit 50 as illustrated, the groove 111 is formed on the outer peripheral surface, the conduit 50 in the groove 111 ) The sealing 140 for watertightness with the inner wall surface may be formed in a combined structure. An uneven portion 113 is formed on the inlet side inner circumferential surface of the outer body 110 so that a passage for fluid flow can be formed.

The inner body 120 is formed in the form protruding in the axial direction with respect to the outer body 110, the departure prevention projections 121 protruding in the radial direction is formed at the front end. The separation preventing protrusion 121 is such that the blocking ring 130 fitted to the inner body 120 is not easily separated, but the inclined surface 123 is formed in the insertion direction of the blocking ring 130 to facilitate the coupling.

In addition, a plurality of support protrusions 125 are formed on the outer circumferential surface of the inner body 120 to support the inner circumferential surface of the blocking ring 130 to maintain a radial position and to form a passage for fluid flow.

The liver 127 connects the inner body 120 and the outer body 110 and at the same time, the space between each liver 127 forms a fluid communication path 129.

The blocking ring 130 is made of a material that is relatively easily elastically deformed, including rubber or soft synthetic resin, the shape is changed in accordance with the pressure increase of the fluid, for example, made of an O-ring form used as a conventional sealing material as shown Can be.

The flow rate valve of the present invention configured as described above is installed such that the portion to which the shutoff ring 130 is coupled is positioned in a direction opposite to the fluid flow of the conduit 50. When the flow rate of the conduit 50 is small, the fluid flow is made freely through the communication path 129 and the surroundings of the blocking ring 130, at this time, the uneven portion 113 and the inner body formed on the outer body 110 Since the fluid flow can be made more smoothly through the passage between the support protrusions 125 formed in the 120, it is possible to reduce the flow rate loss due to the flow resistance due to the installation of the constant flow valve and to prevent the generation of noise.

In this state, when the flow rate is increased, the radial cross-sectional area is increased while the blocking ring 130 is in close contact with the liver 127 by the pressure of the fluid, and thus the flow path cross-sectional area is reduced to adjust the flow rate.

As described above, the constant flow valve of the present invention has a simple structure in which the shutoff ring 130 is coupled to the valve body 100, and thus, manufacturing cost is low and productivity is high.

In addition, since the flow passage cross-sectional area is reduced by the increase in the cross-sectional area of the blocking ring 130 according to the increase in the pressure of the fluid, in particular, the uneven portion 113 of the outer body 110 and the support of the inner body 120 Since the passage between the protrusions 125 is also narrowed by the radial expansion of the blocking ring 130, unlike the conventional valve shown in FIG. 1, a flow path having a fixed cross-sectional area is not formed, and thus the flow rate retention function is improved. It has the advantage of being.

On the other hand, in the above-described embodiment is illustrated to be inserted into the interior of the conduit 50, but is not limited to this, as shown in Figure 6 the outer body 110 is installed between the conduit 50 is installed It may also be configured to function as a housing.

That is, in the embodiment shown in FIG. 6, the valve body 100 is made of the outer body 110 and the inner body 120 connected by the liver 127 similar to the above-described embodiment, and the inner body 120 Blocking ring 130 is to have a structure coupled to, it is made of a structure in which a pipe coupling portion 117 extending in the longitudinal direction on the outside of the outer body 110 is formed. The connection joint 117 may be formed integrally with the outer body 110 or may be made of a separate member. This structure has the advantage that the outer body 110 functions as a housing connected to the outside of the conduit 50, there is no need for a separate housing to simplify the installation work and reduce the installation cost.

In addition, although not shown, the valve body 100 is not only a unitary structure as in the above-described embodiments, but also a plurality of the outer body 110 and the inner body 120 can be separated from each other, and each of its own It may be made of an individual member.

In addition, the departure preventing protrusion 121 may be formed in various shapes protruding in a radial direction than the inner body 120 as well as the shape as shown. For example, it may be formed in the form of a protruding annular shape is continuous along the outer circumferential surface of the inner body 120 or cut at predetermined intervals, in the case of the separation prevention protrusion formed in this way it is provided with a plurality of through holes for smooth fluid flow desirable.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, according to the present invention, it is possible to provide a constant flow rate valve having a low manufacturing cost while improving the constant flow rate maintenance function by preventing the passage having a fixed flow path cross-sectional area even when the flow rate is increased and having a concise structure. It works.

In addition, the flow rate valve of the present invention can smoothly flow through the passage formed between the uneven portion of the outer body and the support protrusion of the inner body, it is possible to reduce the flow loss and noise generated by the fluid flow of the installation pipeline There is an advantage to reduce.

Claims (5)

An inner body 120 protruding in the axial direction is formed inside the outer body 110 having a single tube shape, and a space between the liver body 127 connecting the outer body 110 and the inner body 120 is fluid. A valve body 100 constituting the communication path 129 and having a departure preventing protrusion 121 protruding in a radial direction from the inner body 120; And The blocking ring 130 is coupled to the inner separation prevention protrusion 121 of the inner body 120, made of an elastic material and in close contact with the liver 127 as the pressure of the fluid is applied to increase the radial cross-sectional area. Including a constant flow valve. The method of claim 1, Grooves 111 are formed on the outer circumferential surface of the valve body 100, and a constant flow valve having a seal 140 coupled to the grooves 111. The method of claim 1, A constant flow valve having a pipe coupling portion 117 extending in the longitudinal direction to the outside of the outer body 110 and inserted into and coupled to the pipe line 50. The method according to any one of claims 1 to 3, The inner body 120 has a constant flow valve having a support protrusion 125 for supporting the inner circumferential surface of the blocking ring 130 to be spaced apart from the inner body 120. The method according to any one of claims 1 to 3, A constant flow valve having an uneven portion 113 forming a fluid passage on the inner circumferential surface of the outer body 110.

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