CN217977642U - High-reliability piston cup type emptying valve - Google Patents

Abstract

The utility model discloses a high reliability piston cup type emptying valve, wherein a valve body is fixedly connected with an end cover and comprises an air inlet and an air outlet; the end cover is an end cover with a U-shaped section, the piston cup is arranged in the end cover and can axially slide along the inner wall of the end cover, an inner chamber is formed between the piston cup and the end cover, and a supporting spring for connecting the piston cup and the end cover is arranged in the inner chamber; an inner ring sealing surface is formed on the end surface of the exhaust port in the valve body and is in sealing fit with the end surface of the piston cup; the sealing or communication between the air inlet and the air outlet is realized through the contact or the separation of the sealing fit, and an inner chamber air inlet for communicating the inner chamber and the air inlet is also arranged on the piston cup; the end cover is provided with a vent, the vent is connected with an air pipe tee, and the vent is respectively connected with a first branch electromagnetic valve and a second branch electromagnetic valve through the air pipe tee.

Description

High-reliability piston cup type emptying valve

Technical Field

The utility model relates to an atmospheric valve device belongs to centrifugal blower equipment technical field.

Background

Centrifugal blower compares positive displacement blowers such as traditional roots's fan, has outstanding advantage in aspects such as operating efficiency, noise vibration, is a development trend of blower technique. However, a limitation condition of the operation of the centrifugal blower is that the centrifugal blower must be stably operated under specific pressure and flow rate conditions, that is, under a certain operation pressure, a certain operation flow rate must be ensured to normally operate, otherwise, the centrifugal impeller enters a surge operation region, which causes rapid expansion of vibration and frequent vibration damage to the impeller, which is a condition that must be sufficiently ensured in the application of the centrifugal blower. Therefore, the centrifugal blower system must be equipped with a corresponding blow valve. In the operation process of the emptying valve, the emptying is timely operated according to a system instruction, so that the centrifugal blower can be ensured to have an emptying bypass to discharge enough air quantity, and cannot enter a surging working area, and the normal operation of the centrifugal blower is ensured. For these reasons, the blow valve itself can be considered a necessary safety configuration for centrifugal blowers, a critical device that avoids entering a "surge" operating region, and is also the standard configuration for almost all centrifugal blowers today.

Because of the important role played by the atmospheric valve, the reliability of the centrifugal blower can be directly influenced by the reliability of the atmospheric valve. When the air release valve is required to act for air release, once the air release valve cannot be opened in time, the centrifugal blower cannot have enough exhaust flow to be led out through the bypass, and abnormal vibration and even damage of the centrifugal impeller are easily caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a piston cup type emptying valve which can be emptied quickly under the condition of low pressure.

The utility model discloses a high reliability piston cup formula atmospheric valve, including valve body, end cover, piston cup, supporting spring, the valve body is fixedly connected with the end cover, the valve body includes air inlet and gas vent; a sealing unit is arranged between the valve body and the end cover; the sealing unit is: the end cover is an end cover with a U-shaped section, the piston cup is arranged in the end cover and can axially slide along the inner wall of the end cover, an inner chamber is formed between the piston cup and the end cover, and a supporting spring for connecting the piston cup and the end cover is arranged in the inner chamber; an inner ring sealing surface is formed on the end surface of the exhaust port in the valve body and is in sealing fit with the end surface of the piston cup; the sealing or communication between the air inlet and the air outlet is realized through the contact or the separation of the sealing fit, and an inner chamber air inlet hole for communicating the inner chamber and the air inlet is also arranged on the piston cup; the end cover is provided with a vent, the vent is connected with an air pipe tee, and the vent is respectively connected with a first branch electromagnetic valve and a second branch electromagnetic valve through the air pipe tee.

The utility model discloses during operation, two solenoid valves are opened in control, communicate with the atmosphere in the valve, can provide enough downward pressure promptly when the exhaust pressure 5-6kPa, promote the piston cup downstream, and the sealing ring on the piston cup leaves the circular ring in the valve body in the twinkling of an eye, and high-pressure gas's active area becomes the U-shaped bottom surface of whole piston cup in the twinkling of an eye, and the thrust down that further increase piston cup received to the atmospheric valve is opened to the higher speed. Just so realized opening atmospheric valve under very low pressure, be very quick opening atmospheric valve moreover, the blast pipe that two solenoid valves are connected communicates atmosphere simultaneously, and it is bigger to compare the blast pipe effective diameter that single solenoid valve opened, and the pressure decline of interior chamber is more quick, and action time is less than 0.05s

When the emptying valve is closed, the double electromagnetic valves are closed simultaneously, the inner chamber is not communicated with the atmosphere, high-pressure side gas enters the inner chamber through the air inlet of the inner chamber, the gas pressure of the inner chamber is gradually increased, and the air inlet of the inner chamber is very small, so that the pressure of the inner chamber is very slowly increased. The process also realizes the slow closing of the emptying valve, and the valve closing action time can be realized to be more than 10s by adjusting the type selection of the spring.

Furthermore, a first switch valve and a second switch valve are respectively arranged between the air pipe tee joint and the first branch electromagnetic valve and between the air pipe tee joint and the second branch electromagnetic valve. The first switch valve and the second switch valve are manual ball valves.

Compare conventional single solenoid valve and open, adopt two solenoid valves to open simultaneously, chamber pressure in the reduction that can be more quick, more quick messenger's piston cup descends, and also more quick realization is emptyd, and the time that the emptys was opened can be improved within 0.1s from about 0.5 s.

Drawings

FIG. 1 is a schematic cross-sectional view of a blow-down valve.

Detailed Description

The detailed description is further provided with reference to the attached drawings.

In FIG. 1, one end of a valve body 1 is connected with an air inlet 14, the other end of the valve body is connected with an exhaust port 15, an inner circular ring and an outer circular ring 1-2 are arranged at the other end of the valve body, the outer circular ring 1-2 and an end cover 2 are tightly fixed through a fastener, a piston cup 3 is arranged between the valve body 1 and the end cover 2, a U-shaped cup mouth of the piston cup 3 faces one side of the end cover 2, a cup bottom faces one side of the valve body 1, an inner chamber 16 is formed between the U-shaped cup of the piston cup 3 and the U-shaped cup of the end cover 2, a supporting spring 4 is arranged in the inner chamber 16, two ends of the supporting spring 4 are respectively connected with the piston cup 3 and the end cover 2, a sealing ring 10 is arranged on the U-shaped cup bottom face of the piston cup 3, a pressing plate 11 is fixed on the U-shaped cup bottom of the piston cup 3 through the fastener and presses the sealing ring 10 on the U-shaped cup bottom of the piston cup, the sealing ring 10 is tightly adhered to the inner circular sealing face 1-1 of the valve body 1, an inner circular sealing face 3 of the piston cup 3 is provided with an inner chamber air inlet 3-1, and the inner chamber air inlet 3-1 is communicated with the inner chamber 16 and the air inlet 14; the outer side of the U-shaped cup wall of the piston cup 3 is provided with a guide groove 3-2, and a guide ring 17 is arranged in each guide groove 3-2; the outer side of the U-shaped cup bottom of the end cover 2 is provided with an air pipe joint 5, is connected with an air pipe tee joint 7 through an inner cavity main exhaust pipe 6, is connected with a first branch electromagnetic valve 9 through a first branch air pipe 8, and is connected with a second branch electromagnetic valve 13, the first branch electromagnetic valve 9 and the second branch electromagnetic valve 13 through a second branch air pipe 12 to be connected with the atmosphere.

At the beginning, the piston cup 3 is contacted with the valve body 1 under the action of the supporting spring 4, and the air inlet 14 is not communicated with the air outlet 15; the first branch electromagnetic valve 9 and the second branch electromagnetic valve 13 are not electrified and are in an open state, the inner chamber 16 is communicated with the atmosphere, high-pressure gas coming from the side of the air inlet 14 acts on the bottom surface of the piston cup 3 on the outer side of the inner circular sealing surface 1-1, when the air inlet pressure reaches a certain value, the piston cup 3 is pushed to move downwards more quickly at the moment when the sealing ring 10 is disengaged from the inner circular sealing surface 1-1, the air inlet 14 is communicated with the exhaust port 15 immediately, and the purpose of quickly emptying is achieved.

When the air release valve needs to be closed, the first branch electromagnetic valve 9 and the second branch electromagnetic valve 13 are closed after being electrified, the inner chamber 16 is not communicated with the atmosphere any more, high-pressure gas connected with the gas inlet 14 enters the inner chamber 16 through the inner chamber gas inlet 3-1, the gas pressure of the inner chamber 16 rises, and when the pressure rises to a certain value, the piston cup 3 is pushed to move upwards. The piston cup 3 is moved slowly until sealing contact is made; the inlet port 14 and the outlet port 15 are no longer in communication, and the closing of the vent valve is achieved.

When the fault that one way of electromagnetic valve can not be normally closed occurs, the emptying valve can not be normally closed, namely the emptying valve is always in an emptying state. This is the drawback that this structure appears easily, and corresponding atmospheric valve can't be closed, and in case when this trouble appears, complete machine intelligence system can in time discern and inform equipment operation and maintenance personnel through thing networking module equipment trouble information, and operation and maintenance personnel only need close first ooff valve 18 or second ooff valve 19 on the trachea that the trouble solenoid valve is located, and this atmospheric valve resumes normally immediately, and complete machine equipment can continue normal work immediately. Next, the equipment manufacturer can arrange to send a new electromagnetic valve to the equipment operation unit immediately according to the fault information automatically reported by the equipment, the equipment operation unit can automatically stop the machine to replace the fault electromagnetic valve after receiving the electromagnetic valve, and the switch valve on the side is opened, so that the emptying valve is completely recovered to be normal. Adopt the structure of two solenoid valves like this, realized that the reliability of atmospheric valve opening evacuation improves by a wide margin, can in time and convenient processing to the unable normally fault condition of closing of solenoid valve simultaneously, do not basically influence the normal operating of equipment.

The present invention is not limited to the specific embodiments described above. That is, various changes and modifications can be made by those skilled in the art to which the present invention pertains without departing from the scope of the spirit of the appended claims, and all such suitable changes and modifications should be considered as equivalents within the scope of the present invention.

The basic structure, essential features and advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principle construction of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. A high-reliability piston cup type emptying valve is characterized by comprising a valve body (1), an end cover (2), a piston cup (3) and a supporting spring (4), wherein the valve body (1) is fixedly connected with the end cover (2), and the valve body (1) comprises an air inlet (10) and an air outlet (11); a sealing unit is arranged between the valve body (1) and the end cover (2); the sealing unit is: the end cover (2) is an end cover with a U-shaped section, the piston cup (3) is arranged in the end cover (2) and can axially slide along the inner wall of the end cover (2), an inner chamber (16) is formed between the piston cup (3) and the end cover (2), and a supporting spring (4) for connecting the piston cup (3) and the end cover (2) is arranged in the inner chamber (16); an inner circular ring sealing surface (1-1) is formed on the end surface of the exhaust port (11) in the valve body (1) and is in sealing fit with the end surface of the piston cup (3); the sealing or communication between the air inlet (10) and the air outlet (11) is realized through the contact or the separation of the sealing fit, and an inner chamber air inlet hole (3-2) for communicating the inner chamber (16) and the air inlet (10) is also arranged on the piston cup (3); the end cover (2) is provided with a vent, the vent is connected with an air pipe tee joint (7), and the vent is respectively connected with a first shunt electromagnetic valve (9) and a second shunt electromagnetic valve (13) through the air pipe tee joint (7).

2. The highly reliable piston cup type vent valve according to claim 1, characterized in that a first switch valve (18) and a second switch valve (19) are respectively installed between the air pipe tee (7) and the first and second shunt solenoid valves (9, 13).

3. The high reliability piston cup vent valve of claim 2, wherein the first and second on-off valves (18, 19) are manual ball valves.

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