CN205350478U - Relief valve - Google Patents

Abstract

The utility model relates to a pressure reducing valve. The technical solution is as follows: a pressure reducing valve, including a valve body, the valve body is provided with a water inlet, a water outlet and an installation cavity, and a pressure reducing component is arranged in the installation cavity, and the pressure reducing component includes a water inlet at one end of the axial direction. , the other end extends to the water inlet channel in the installation cavity and the sliding seat whose outer peripheral surface is sealed with the inner wall of the installation cavity. There is an elastic compression piece between the water inlet channel and the sliding seat, and there is a hole for the water inlet channel to be inserted on the sliding seat. The plugging cavity, the other end of the plugging cavity is provided with a water outlet channel connected to the water outlet relative to the insertion end of the water inlet channel, and there is a water outlet channel and the water inlet channel in the plugging cavity that can float in the plugging cavity and promote water inlet. The anti-medium backflow component that the water channel and the plugging cavity are connected or closed, and a decompression gap is provided between the sliding seat and the water outlet of the valve body, and a diversion hole that is connected to the decompression gap is provided in the plugging cavity. By adopting the above technical solution, a pressure reducing valve with simple structure and medium backflow prevention is provided.

Description

pressure reducing valve

technical field

The utility model relates to a pressure reducing valve.

Background technique

The pressure reducing valve is a valve that reduces the inlet pressure to the outlet pressure of a certain outlet through adjustment, and relies on the energy of the medium itself to keep the outlet pressure automatically stable.

During the use of pure water machines and water purifiers, due to the different pressures in the areas where they are used, it is necessary to implement appropriate decompression for the decompression of their media. Therefore, the pressure reducing valve is an indispensable part of the pure water machine and the water purifier.

The traditional pressure reducing valve is mainly composed of a valve body, an inlet channel, an outflow channel, a connecting chamber and a decompression chamber on the valve body. , there is a diaphragm and a spring in conflict with the diaphragm in the decompression chamber, and a decompression valve core linked with the diaphragm is provided in the connection chamber. When the medium enters the connection chamber from the inlet channel, and then enters the decompression In the cavity, the pressure of the medium will press the diaphragm. When the medium pressure overcomes the spring force of the spring, the diaphragm will drive the pressure reducing valve core to move towards the pressure reducing cavity, so that the flow channel between the connecting cavity and the pressure reducing cavity will gradually Narrow down, so as to reduce the pressure of the medium discharged from the outflow channel, and play a role in reducing the pressure of the medium.

However, the diaphragm inside is easily damaged and needs to be replaced frequently, and there are too many parts, resulting in high production costs. In addition, the medium is easy to flow back from the outflow channel.

Contents of the invention

Aiming at the deficiencies in the prior art, the utility model provides a pressure reducing valve with simple structure and anti-medium backflow.

In order to achieve the above purpose, the utility model provides the following technical solutions: a pressure reducing valve, including a valve body, the valve body is provided with a water inlet, a water outlet and an installation cavity between the water inlet and the water outlet, so The above-mentioned installation cavity is provided with a decompression assembly, which is characterized in that: the decompression assembly includes a water inlet channel at one end of the axial direction, and the other end extends into the installation cavity and is fixedly connected with the valve body. The surface is sealed with the inner wall of the installation cavity and can reciprocate axially along the water inlet channel. There is an elastic compression piece between the water inlet channel and the slider. The other end of the connection cavity is provided with a water outlet channel connected to the water outlet relative to the insertion end of the water supply channel, and there is a water outlet channel between the water outlet channel and the water inlet channel in the insertion cavity that can float in the insertion cavity and promote the water inlet channel and the insertion channel. The anti-medium backflow component with the connection chamber connected or closed, a decompression gap is provided between the sliding seat and the water outlet of the valve body, and a diversion hole connected with the decompression gap is provided in the insertion chamber.

With the above technical scheme, when the medium enters the insertion cavity of the slide seat from the water inlet through the water inlet channel, and then is discharged into the decompression gap through the diversion hole of the insertion cavity, the water pressure of the medium at this time is so high that when it is in the decompression gap When the pressure of the medium is greater than the pressing force of the elastic compression member on the sliding seat, the sliding seat moves towards the water inlet, and then the elastic compression member acts against the medium pressure, thereby reducing the medium pressure of the medium discharged from the water outlet. In this way, the setting structure is simple, and there is no need to arrange a diaphragm inside the valve body, which facilitates maintenance and reduces maintenance costs. The setting of the anti-medium backflow component can prevent the medium at the water outlet from backflowing to the water inlet.

The utility model is further set as: the insertion cavity of the sliding seat is located at the installation place of the anti-medium backflow component, and there is an installation groove with one end connected to the plug-in cavity and the other end connected to the water outlet channel. The anti-medium backflow component is designed gasket in the mounting groove.

Adopting the above-mentioned technical scheme, the setting structure is simple in this way, and the processing and installation are relatively convenient.

The utility model is further set as: the outer peripheral surface of the sliding seat is provided with an annular slot, and the annular slot is provided with a sealing ring which is sealed with the inner wall of the installation cavity.

Adopting the above-mentioned technical solution, such arrangement ensures the sealing between the sliding seat and the installation cavity.

Below in conjunction with accompanying drawing, the utility model is further described.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

detailed description

A pressure reducing valve as shown in Fig. 1, comprises valve body 1, and valve body 1 is provided with water inlet 11, water outlet 12 and is located at the installation chamber 13 between water inlet 11 and water outlet 12, installation chamber 13 is provided with a decompression assembly 2. The decompression assembly 2 includes a water inlet channel 21 that is connected to the water inlet 11 at one end of the axial direction, and the other end extends into the installation chamber 2 and is fixedly connected with the valve body 1, and the outer peripheral surface and the installation chamber. 13 The sliding seat 22 whose inner wall is sealed and can reciprocate axially along the water inlet channel 21, the elastic compression member 3 is arranged between the water inlet channel 21 and the sliding seat 22, and the sliding seat 22 is provided with a hole for inserting the water inlet channel 21 The plugging chamber 221, the other end of the plugging chamber 221 is provided with the water outlet channel 222 connected with the water outlet 12 relative to the insertion end of the water inlet channel 21, and the water outlet channel 222 and the water inlet channel 21 in the plugging chamber 221 are provided with a The anti-medium backflow component 4 that floats in the socket cavity 221 and promotes the conduction or closure of the water inlet channel 21 and the socket cavity 221. There is a decompression gap 14 between the sliding seat 22 and the water outlet 12 of the valve body 1. The socket cavity 221 A guide hole 223 communicating with the decompression gap 14 is provided inside. In the above scheme, when the medium enters the insertion cavity 221 of the slide seat 22 from the water inlet 11 through the water inlet channel 21, and then is discharged into the decompression gap 14 through the flow guide hole 223 of the insertion cavity 221, what is the hydraulic pressure of the medium at this time? When the pressure of the medium in the decompression gap 14 is greater than the pressing force of the elastic compression member 3 on the sliding seat 22, the sliding seat 22 moves toward the water inlet 11, and then the elastic compression member 3 acts in reaction to the medium pressure, thus playing a role Reduce the medium pressure of the medium discharged from the water outlet 12. In this way, the arrangement structure is simple, and there is no need to arrange a diaphragm inside the valve body 1, which facilitates maintenance and reduces maintenance costs. The setting of the anti-medium backflow assembly 4 can prevent the medium at the water outlet 12 from flowing back to the water inlet 11 .

In the embodiment of the present utility model, in order to enable the anti-medium backflow assembly 4 to be stably installed in the insertion cavity 221 of the sliding seat 22, an end and a The plug cavity 221 is connected, and the other end is connected to the installation groove 224 of the water outlet channel 222 .

In order to ensure the tightness between the sliding seat 22 and the installation cavity 13 of the valve body 1, an annular slot 225 is provided on the outer peripheral surface of the sliding seat 22, and the inner wall of the installation cavity 13 is arranged in the annular slot 225. The sealing ring 226 for sealing. It should be noted that a sealing ring is also provided between the outer wall of the end of the water inlet channel 21 inserted into the insertion cavity 221 and the insertion cavity 221 .

Claims (3)

1. an air relief valve, include valve body, valve body is provided with water inlet, outlet and be located at the installation cavity between water inlet and outlet, it is provided with pressure relief assembly in described installation cavity, it is characterized in that: described pressure relief assembly includes the water inlet conducting of axial one end, the other end extends in installation cavity and the intake tunnel that is fixedly connected with the valve body and outer peripheral face and installation cavity inner wall sealing and the slide that can move along intake tunnel axial reciprocating, elastic compression part it is provided with between intake tunnel and slide, slide offers the grafting chamber plugged for intake tunnel, grafting chamber is provided with and the exhalant canal of outlet conducting relative to the other end inserting one end for intake tunnel, it is provided with between exhalant canal and the intake tunnel of grafting intracavity and can be at the anti-medium refluence assembly that grafting intracavity floats and promotes intake tunnel and the conducting of grafting chamber or closing, relief space it is provided with between slide and the outlet of valve body, grafting intracavity is provided with the pod apertures turned on this relief space.

2. air relief valve according to claim 1, it is characterized in that: the grafting intracavity of described slide is positioned at the installation place of anti-medium refluence assembly and is provided with one end and the conducting of grafting chamber, the mounting groove that the other end turns on exhalant canal, described anti-medium refluence assembly is the sealing gasket being located in mounting groove.

3. air relief valve according to claim 1 and 2, it is characterised in that: the outer peripheral face of described slide is provided with ring-type short slot, is provided with the sealing ring of inner wall sealing with installation cavity in this ring-type short slot.