CN202972045U - An elastic hose type check valve used in a dusty environment - Google Patents

Abstract

The utility model relates to an elastic rubber tube type check valve used in a multi-dust environment, which comprises a valve body, a valve cover and a valve cover, wherein a cavity is arranged in the valve body, a mounting hole is formed at one end of the valve body and is communicated with the cavity, and an output port is arranged at the other end of the valve body and is communicated with the cavity; the front end part of the valve core extends into the cavity of the valve body from the mounting port, the mounting port of the valve body is blocked, and an air flow channel is arranged on the valve core; the inlet of the airflow channel is positioned at the tail part of the valve core, and the outlet of the airflow channel is positioned at the front end part; the elastic rubber tube type check valve is reliable in work, better in sealing performance, easy to maintain and lower in cost and is used in a multi-dust environment.

Description

An elastic hose type check valve used in a dusty environment

1. Technical field

The utility model relates to an elastic hose type one-way valve used in a dusty environment.

2. Background technology

There are generally two types of traditional check valve structures, as follows:

The first one-way valve structure is shown in Figure 1 and Figure 2. It includes a valve body 1, a valve core 2, a valve cover 3, a gasket 4, a spring 5 and an O-ring 6, and a cavity 11 is set inside the valve body 1. , one end of the valve body 1 is provided with an output port 12, and the other end is installed with a valve cover 3 to block one end of the cavity 11. The valve cover 3 is provided with an air flow channel 31 to communicate with the cavity 11, and the valve core 2 is equipped with a gasket 4, and the valve core 2 and the spring 5 are placed inside the cavity 11, one end of the spring 5 presses against the inner wall of the cavity 11, and the other end of the spring 5 presses on the valve core 2, so that the gasket 4 on the valve core 2 blocks the airflow channel 31. When compressed air enters the input port 32 of the air flow channel 31, the pressure of the compressed air acts on the gasket 4 on the end face of the valve core 2 to compress the spring 5, and the channel between the valve core 2 and the output port 12 is opened and compressed. Air enters the inner chamber 22 of the valve core from the holes 21 on both sides of the valve core 2 to the output port 12 . When compressed air enters the output port 12, the valve core 2 will seal the air flow channel 31 under the joint action of the compressed air and the spring 5, and play the role of forward conduction and reverse cutoff.

The second one-way valve structure is shown in Figure 3 and Figure 4, which includes a valve body 1, a valve core 2, a valve cover 3, a spring 5 and an O-ring 4, a cavity 11 is set inside the valve body 1, and the valve body 1 An input port 12 is provided at one end, and a bonnet 3 is installed at the other end to block one end of the cavity 11. An air flow passage 31 is provided on the bonnet 3 to communicate with the cavity 11. The end of the air flow passage 31 forms an output port. The spool 2 and the spring 5 Placed in the cavity 11 , one end of the spring 5 presses against the inner wall of the air flow channel 31 on the valve cover 3 , and the other end of the spring 5 presses on the valve core 2 to block the input port 12 on the valve core 2 . When compressed air enters the input port 12, the pressure of the compressed air acts on the end surface of the valve core 2 to compress the spring 5, and the channel between the valve core 2 and the input port 12 is opened, and the compressed air flows from the valve core 2 to the air flow channel. 31. When compressed air enters the air flow channel 31, the valve core 2 will seal the input port 12 under the joint action of the compressed air and the spring 5, and play the role of forward conduction and reverse cutoff.

Disadvantages of the above-mentioned one-way valve: due to the use of mechanical seal valve core and valve inner cavity, there will be jamming phenomenon, and factors such as spring elasticity will affect the sealing performance. When compressed air enters the output port, it will be output at the input and input ports. It does not have the function of one-way conduction; when used in a dusty environment, the powder will enter the inner cavity of the valve core from the output port, and the accumulation of powder in the inner cavity of the valve core will hinder the elongation and compression of the spring, which will cause the valve core to collapse. It is difficult to open or close and cannot play the role of single conduction, and the powder will damage other equipment connected to the input port.

3. Contents of the invention

The purpose of the utility model is to provide an elastic hose type one-way valve used in a dusty environment with reliable operation, better sealing performance, easy maintenance and low cost.

The utility model is achieved through the following technical solutions:

An elastic hose type check valve used in a dusty environment, which includes: a valve body with a cavity inside, one end of the valve body forms an installation port to communicate with the cavity, and the other end of the valve body is provided with an output port. The output port communicates with the cavity; a valve core, the front end of the valve core extends from the installation port into the cavity of the valve body, the installation port of the valve body is blocked, and the valve core is provided with an air flow channel; the air flow channel The inlet is located at the tail of the valve core, and the outlet of the airflow channel is located at the front end; an elastic rubber tube is sleeved on the front end of the valve core to block the outlet of the airflow channel; when compressed air enters the inlet of the airflow channel, the compressed air flows from The outlet of the airflow passage reaches the elastic hose, and the elastic hose is expanded and opened under the pressure of the compressed air, so that the airflow passage communicates with the cavity, and the valve is opened; Under the combined action of the rubber hose itself, the outlet of the airflow channel is sealed, so that the compressed air cannot reach the airflow channel, and it acts as a one-way conduction.

The outer wall of the tail of the valve core described above is provided with external threads, the inner wall of the installation port of the valve body is provided with internal threads, and the valve core is threadedly connected with the valve body and the installation port is blocked.

The inner wall of the cavity of the above-mentioned valve body forms a first step near the internal thread, and the outer wall of the tail of the valve core forms a second step near the external thread. The second step is clamped.

A mounting boss is provided on the outer side of the tail of the above-mentioned spool.

As mentioned above, a bonnet is provided at the tail of the spool, the front end of the bonnet extends into the installation port and is threadedly connected with the inner wall of the installation port, a connecting pipeline is provided in the middle of the bonnet, and the connecting pipeline communicates with the air flow channel of the spool.

A mounting boss is provided on the outer side of the tail of the above-mentioned valve cover.

The elastic hose described above is a rubber hose or an elastic plastic hose.

The outlet of the airflow channel mentioned above is located on the side wall of the front end of the valve core, the outlet of the airflow channel is perpendicular to the airflow channel, or the outlet of the airflow channel is inclined to the airflow channel.

There are several outlets of the above-mentioned air flow channels, which are distributed in the same section of the valve core, and an air ring is formed on the surface of the valve core.

The above-mentioned valve core is provided with a chamfered cone near the opening of the elastic rubber tube, and the opening of the elastic rubber tube is sleeved on the chamfered cone.

Compared with the prior art, the utility model has the following advantages: 1. The elastic rubber tube is set on the front end of the valve core to block the outlet of the air flow passage; The outlet reaches the elastic hose, and under the pressure of the compressed air, the elastic hose is expanded and opened, so that the air flow channel is connected with the cavity, and the valve is opened; when the compressed air enters the output port, the elastic hose is elastic under the pressure of the compressed air and the elastic hose itself. Under the joint action of sealing the outlet of the airflow channel, the compressed air cannot reach the airflow channel, which plays the role of one-way conduction, and ensures a high degree of sealing when opening and closing, especially suitable for one-way in a dusty environment. 2) The spool can be easily taken out, which is convenient for maintenance and replacement of high-elastic hose, which improves the service life and reduces the cost of use; 3) There are several outlets of the air flow channel, which are distributed on the same section of the spool, and on the surface of the spool An air ring is formed to increase the force-bearing area of the rubber hose, making it easier for the one-way valve to conduct. At the same time, when the output port of the one-way valve has compressed air input, the rubber hose is subjected to external pressure at the position of the air ring to make the seal between the rubber hose and the valve core tighter. reliable. 4) The structure is simpler, the cost is lower, the phenomenon of mechanical jamming is eliminated, and the work is more reliable and durable.

4. Description of drawings:

Fig. 1 is a structural schematic diagram of a conventional one-way valve in a closed state.

Fig. 2 is a structural schematic diagram of an existing one-way valve in an open state.

Fig. 3 is a structural schematic diagram of another existing one-way valve in a closed state.

Fig. 4 is a structural schematic diagram of another conventional one-way valve in an open state.

Fig. 5 is a schematic structural view of the utility model in a closed state.

Fig. 6 is A-A sectional view of Fig. 5;

Fig. 7 is a structural schematic diagram of the utility model in an open state.

Fig. 8 is a B-B sectional view of Fig. 7 .

Fig. 9 is an improved structural diagram of the utility model.

5. Specific implementation methods:

Embodiment one:

As shown in Figure 5, Figure 6, Figure 7 and Figure 8, an elastic hose type check valve used in a dusty environment includes:

A valve body 10, a cavity 101 is arranged inside, an installation port 102 is formed at one end of the valve body 10 to communicate with the cavity 101, and the other end of the valve body 10 is provided with an output port 103, and the output port 103 is communicated with the cavity 101;

A spool 20, the front end of the spool 20 extends from the installation port 102 into the cavity 101 of the valve body 10, the installation port 102 of the valve body 10 is blocked, and the spool 20 is provided with an airflow channel 201; The inlet 203 of the channel 201 is located at the tail of the valve core 20, and the outlet 202 of the air flow channel 201 is located at the front end;

An elastic rubber tube 30, the elastic rubber tube 30 is set on the front end of the valve core 20 to block the outlet 202 of the air flow channel 201;

When compressed air enters the inlet 203 of the airflow passage 201, the compressed air reaches the elastic hose 30 from the outlet 202 of the airflow passage 201, and the elastic hose 30 is expanded under the pressure of the compressed air, so that the airflow passage 201 and the cavity 101 is connected, and the valve is opened; when compressed air enters the output port 103, the elastic hose 30 seals the outlet 202 of the airflow channel 201 under the joint action of the compressed air and the elasticity of the elastic hose 30 itself, and the compressed air cannot reach the airflow channel 201. Play the role of one-way conduction.

The outer wall of the tail of the valve core 20 is provided with an external thread 204, and the inner wall of the installation port 102 of the valve body 10 is provided with an internal thread 104, and the valve core 20 is threadedly connected with the valve body 10 and blocks the installation port 103.

The inner wall of the cavity 101 of the valve body 10 forms a first step 105 near the internal thread 104, and the outer wall of the tail of the valve core 20 forms a second step 205 near the external thread 204. The valve core 20 is covered with a seal 40, the seal 40 is clamped by the first step 105 and the second step 205, the outer side of the tail of the valve core 20 is provided with a mounting boss 208, the elastic rubber tube 30 is a rubber tube or an elastic plastic rubber tube, and the outlet 202 of the air flow channel 201 is located at the front end of the valve core 20 On the side wall of the airflow channel 201 , the outlet 202 of the airflow channel 201 is perpendicular to the airflow channel 201 , or the outlet 202 of the airflow channel 201 is inclined to the airflow channel 201 . Several outlets 201 of the air flow channel 201 are provided and distributed on the same section of the valve core 20 , and an air ring 206 is formed on the surface of the valve core 20 .

The valve core 20 is provided with a chamfered cone surface 207 close to the opening of the elastic rubber tube 30 , and the opening of the elastic rubber tube 30 is sleeved on the chamfered cone surface 207 . When compressed air enters the output port 103, the opening of the elastic rubber tube 30 is tightly fitted on the chamfered cone surface 207 to improve the sealing performance.

Embodiment two:

This embodiment is an improvement on Embodiment 1. As shown in FIG. 9 , an elastic hose type check valve used in a dusty environment includes: a valve body 10 with a cavity 101 inside, and one end of the valve body 10 An output port 103 is arranged on the top, and the output port 103 communicates with the cavity 101; a spool 20, the spool 20 extends into the cavity 101 of the valve body 10, the installation port of the valve body 10 is blocked, and the spool 20 is provided with an air flow channel 201; the inlet 203 of the air flow channel 201 is located at the tail of the valve core 20, and the outlet 202 of the air flow channel 201 is located at the front end; an elastic rubber tube 30 is set on the front end of the valve core 20 to block The outlet 202 of the airflow passage 201; when the inlet 203 of the airflow passage 201 has compressed air entering, the compressed air reaches the elastic rubber tube 30 from the outlet 202 of the airflow passage 201, and the elastic rubber hose 30 is expanded and opened under the pressure of the compressed air, so that When the airflow channel 201 communicates with the cavity 101, the valve is opened; when the output port 103 has compressed air entering, the elastic rubber hose 30 seals the outlet 202 of the airflow channel 201 under the joint action of the compressed air and the elasticity of the elastic rubber hose 30 itself, and the compressed air It is impossible to reach the airflow channel 201, which plays the role of one-way conduction.

The elastic rubber hose 30 is a rubber hose or an elastic plastic hose. The outlet 202 of the airflow passage 201 is located on the side wall of the front end of the valve core 20. The outlet 202 of the airflow passage 201 is perpendicular to the airflow passage 201, or the outlet 202 of the airflow passage 201 is connected to the airflow. Channel 201 is inclined.

A bonnet 50 is provided at the tail of the spool 20, the front end of the bonnet 50 extends into the installation port and is threadedly connected with the inner wall of the installation port 102, and the middle part of the bonnet 50 is provided with a connecting pipeline 501, which connects the pipeline 501 and the air flow channel 201 of the spool 20 In communication, a mounting boss 502 is provided on the outside of the tail of the valve cover 50 . Such a structure makes processing and installation easier.

Claims (10)

1. elastic gum tubular type one-way valve that is used under many dust atmospheres is characterized in that it comprises:

One valve body, the inside arranges cavity, and valve body one end forms mount inlet and is communicated with cavity, is provided with delivery outlet on the valve body the other end, and this delivery outlet is communicated with cavity;

One spool, the front end of spool extend into the cavity the inside of valve body from mount inlet, the mount inlet of valve body is blocked, and is provided with air-flow path on spool; The entrance of air-flow path is positioned at the spool afterbody, and the outlet of air-flow path is positioned at front end;

One elastic rubber tube, elastic rubber tube are enclosed within the outlet that blocks air-flow path on the front end of spool;

When the entrance of air-flow path had pressurized air to enter, pressurized air arrived elastic rubber tube from the outlet of air-flow path, and elastic rubber tube is inflated and opens under compressed-air actuated pressure-acting, and air-flow path is communicated with cavity, and valve is opened; Enter when delivery outlet has pressurized air, elastic rubber tube seals the outlet of air-flow path under pressurized air and the flexible acting in conjunction of elastic rubber tube itself, and pressurized air just can't arrive air-flow path, plays the effect of one-way conduction.

2. according to claim 1 a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, it is characterized in that: spool afterbody outer wall is provided with outside thread, the inwall of the mount inlet of valve body arranges internal thread, and spool is connected with valve body screw thread and the shutoff mount inlet.

3. according to claim 2 a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, it is characterized in that: the inwall of the cavity of valve body forms first step near the position of internal thread, spool afterbody outer wall forms second step near externally threaded position, the outer surface cover of spool has Sealing, and Sealing is clamped by first step and second step.

4. described a kind of for the elastic gum tubular type one-way valve under many dust atmospheres according to claim 3, it is characterized in that: the afterbody arranged outside installation base of spool.

5. according to claim 3 a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, it is characterized in that: at the spool afterbody, valve gap is set, the front end of valve gap stretches into mount inlet and is connected with the mount inlet inner thread, the valve gap middle part arranges connecting pipeline, and connecting pipeline is communicated with the air-flow path of spool.

6. according to claim 5 a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, it is characterized in that: valve gap afterbody arranged outside installation base.

7. according to claim 1 to 6, any one is described a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, and it is characterized in that: elastic rubber tube is rubber pipe or elastomeric plastics sebific duct.

8. according to claim 1 and 2 or 3 or 4 or 5 is described a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, it is characterized in that: the outlet of air-flow path is positioned on the sidewall of front end of spool, the outlet of air-flow path is perpendicular to air-flow path, and perhaps the outlet of air-flow path and air-flow path tilt.

9. according to claim 1 and 2 or 3 or 4 or 5 described a kind of it is characterized in that: the outlet of air-flow path arranges several for the elastic gum tubular type one-way valve under many dust atmospheres, and is distributed in the same cross section of spool, and forms air ring at spool face.

10. according to claim 1 and 2 or 3 or 4 or 5 is described a kind of for the elastic gum tubular type one-way valve under many dust atmospheres, it is characterized in that: spool arranges the chamfering conical surface at the opening near elastic rubber tube, and the opening sleeve of elastic rubber tube is on the chamfering conical surface.

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