CN213298898U

CN213298898U - Air suspension blower atmospheric valve and air-blower

Info

Publication number: CN213298898U
Application number: CN202021551528.5U
Authority: CN
Inventors: 项懂欣; 袁军
Original assignee: Xinlei Compressor Co Ltd
Current assignee: Xinlei Compressor Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-05-28
Anticipated expiration: 2030-07-30

Abstract

The utility model belongs to the technical field of air blowers, and relates to an air suspension air blower vent valve and an air blower, wherein the vent valve comprises a valve body, a valve cover and a valve core; the middle part of the valve body is longitudinally provided with an air inlet pipe, the air inlet pipe extends downwards to the inside of the valve body to divide the inside of the valve body into an air inlet cavity and an air outlet cavity, the air outlet cavity is arranged on the outer ring of the air inlet cavity, and an air outlet pipe is arranged on one side of the air outlet cavity; the valve cover is connected in a sealing mode and arranged at the bottom of the valve body, the control air port is formed in the middle of the bottom of the valve cover, the valve core is located between the valve body and the valve cover, the main body of the valve core is a flexible sealing disc, the valve cover and the valve body are isolated through the flexible sealing disc in a sealing mode, and after the control air port is inflated, the air outlet at the bottom of the air inlet pipe can be sealed when the stress of the. The advantage of this patent prevents that the air suspension air-blower from pressing the start-up in area, prevents to appear surging phenomenon and obtains the guarantee to air suspension air-blower safe operation.

Description

Air suspension blower atmospheric valve and air-blower

Technical Field

The utility model belongs to the technical field of the air-blower, especially, relate to an air suspension air-blower atmospheric valve and air-blower.

Background

The single-stage high-speed centrifugal blower consists of the following five parts: high-speed motor, impeller, diffuser, spiral case, suspension bearing. The gas of the single-stage high-speed centrifugal blower enters the impeller from the axial direction, changes into the radial direction when flowing through the impeller and then enters the diffuser, the gas changes the flowing direction to cause deceleration in the impeller and the diffuser, and the deceleration action converts kinetic energy into pressure energy, thereby achieving certain air volume and air pressure.

According to the operation characteristics of the centrifugal blower, the pressure and the rotating speed are in close relation, the exhaust pressure is low during the starting process of the centrifugal blower, particularly when the rotating speed is low, even the exhaust pressure is not enough to overcome the back pressure resistance, and the centrifugal blower must be emptied, otherwise, the centrifugal blower enters a surge area, and the safe operation of the centrifugal blower is seriously threatened. This is also the case during a shutdown, in which the blower discharge pressure is lower than the gas pressure in the downstream pipeline, and such a reverse pressure gradient can lead to back flushing of the pipeline gas back to the blower, so that emptying must also take place in this case.

An existing air blower vent valve, for example, a pneumatic vent valve disclosed in chinese utility model patent publication No. CN210716131U (published as 20200609), includes a three-way vent valve housing, a vent valve end cap, a vent valve piston, a return spring, and an electromagnetic valve; the three-way emptying valve is internally provided with a left air inlet and an air inlet cavity, an emptying valve piston is sleeved in an emptying valve end cover, the bottom wall of the emptying valve piston is in sealing arrangement when contacting with the top of the air inlet cavity, an electromagnetic valve is fixedly arranged at the top end of the emptying valve end cover, and a reset spring is arranged between the emptying valve end cover and the emptying valve piston; and a micro air inlet hole is formed in the edge of the bottom of the piston of the emptying valve. This atmospheric valve structure is too loaded down with trivial details to realize opening and closing through the atmospheric valve piston, the wayward gas pressure size, thereby inconvenient blowdown processing of carrying out, and then the blowdown effect that plays is not good.

Disclosure of Invention

The utility model aims at solving the above-mentioned poor problem of current air-blower atmospheric valve unloading effect, provide an air suspension air-blower atmospheric valve, this atmospheric valve seals the gas outlet of intake pipe bottom through the top that simply makes the case ingenious, and the effort through the case bottom cooperatees with the effort at case top to be convenient for better realize opening and closing the case, and then better reach the effect of anti-surge and obtain the guarantee to the safe operation of air-blower.

For the purpose of the utility model, the following technical scheme is adopted to realize:

an air suspension blower emptying valve comprises a valve body, a valve cover and a valve core; the middle part of the valve body is longitudinally provided with an air inlet pipe, the air inlet pipe extends downwards to the inside of the valve body to divide the inside of the valve body into an air inlet cavity and an air outlet cavity, the air outlet cavity is arranged on the outer ring of the air inlet cavity, and an air outlet pipe is arranged on one side of the air outlet cavity; the valve cover is connected in a sealing mode and arranged at the bottom of the valve body, the control air port is formed in the middle of the bottom of the valve cover, the valve core is located between the valve body and the valve cover, the main body of the valve core is a flexible sealing disc, the valve cover and the valve body are isolated through the flexible sealing disc in a sealing mode, and after the control air port is inflated, the air outlet at the bottom of the air inlet pipe can be sealed when the stress of the.

Preferably, a matching cavity is formed between the bottom surface of the valve core and the valve cover, a spring is longitudinally arranged in the middle of the matching cavity, and the upper end and the lower end of the spring are respectively abutted against the valve core and the valve cover.

Preferably, the bottom outer ring of the air inlet pipe is provided with a convex ring.

Preferably, the spring is a tower spring.

Preferably, the flexible sealing disk has a cross section in a shape of a letter, and a hard support plate is provided below the flexible sealing disk and the air outlet sealing portion, and the hard support plate is fixed below the flexible sealing disk by a screw.

Preferably, the outer edge of the flexible sealing disk extends to the junction of the valve cover and the valve body to seal the junction between the valve cover and the valve body.

Preferably, the flexible sealing disc is made of a temperature-resistant silica gel material or temperature-resistant rubber.

Preferably, the control air port is connected with an electromagnetic control valve.

An air suspension blower comprises a blower body and the emptying valve, wherein the emptying valve is connected with the blower body.

Adopt above-mentioned technical scheme's an air suspension air-blower atmospheric valve, this atmospheric valve is provided with the bulge loop through the bottom outer wall of intake pipe and is convenient for when matching with the case, when making the lifting surface area of case top bottom surface be greater than case top surface and control gas port and let in equal pressure gas, can make the spring support the case in the chamber bottom that admits air to it is sealed with case and valve body, be convenient for better control, need not to calculate the difference, be convenient for further promote sealed effect and sealed convenience. The cross section of the valve core is in a convex shape, so that a larger action space is formed between the valve core and the air outlet cavity, and the unloading drift diameter during unloading is increased. Adopt tower spring through the spring, be convenient for make the top of spring better be connected with the case, also further promoted the atress effect of spring bottom simultaneously, prevent that the case from taking place the skew when the action.

To sum up, the advantage of this patent prevents that the air suspension air-blower from pressing the start-up in area, prevents to appear surging phenomenon and obtains the guarantee to air suspension air-blower safe operation.

Drawings

Figure 1 is the structure schematic diagram of the utility model discloses air suspension air-blower atmospheric valve.

Detailed Description

The following describes in detail an embodiment of the present invention with reference to the drawings.

As shown in figure 1, the air suspension blower comprises a blower body and an air suspension blower vent valve, wherein the vent valve is connected with the blower body and comprises a valve body 1, a valve cover 2 and a valve core 3. The middle part of the valve body 1 is longitudinally provided with an air inlet pipe 101, the outer ring of the bottom part of the air inlet pipe 101 is provided with a convex ring 102, and air with certain pressure and flow rate is conveniently introduced through the air inlet pipe 101 when the blower is started. Inside intake pipe 101 downwardly extending to valve body 1, cut apart into the air inlet chamber with valve body 1 is inside and go out air cavity 103, go out air cavity 103 and set up in the air inlet chamber outer lane, and be provided with outlet duct 104 in one side of going out air cavity 103, be used for valve core 3 better when opening through outlet duct 104 on the air cavity 103 and be convenient for discharge gas. The valve cover 2 is hermetically connected and arranged at the bottom of the valve body 1, the middle of the bottom of the valve cover 2 is provided with a control air port 202, and the control air port 202 is connected with an electromagnetic control valve which is convenient for better controlling the pressure of the entering gas.

The valve core 3 is arranged between the valve body 1 and the valve cover 2, the main body of the valve core 3 is a flexible sealing disc, the outer edge of the flexible sealing disc extends to the connecting part of the valve cover 2 and the valve body 1, and the valve cover 2 is connected with the valve body 1 in a sealing mode. The flexible sealing disc seals and isolates the valve cover 2 and the valve body 1, and after the control air port 202 is inflated, the flexible sealing disc can seal an air outlet at the bottom of the air inlet pipe 101 when the stress rises. The top of the valve core 3 is propped against the convex ring 102 and seals the air outlet of the air inlet pipe 101, when the convex ring 102 is matched with the valve core 3 conveniently, the stress area of the bottom surface of the top of the valve core 3 is larger than the top surface of the top of the valve core 3, the pressure below the valve core 3 is larger than the pressure above the valve core 3, and the valve core 3 is propped.

The flexible sealing disc is made of a temperature-resistant silica gel material or temperature-resistant rubber, the service life of the valve element 3 is further prolonged through the temperature-resistant silica gel material, the sealing effect is further improved, and gas is prevented from being damaged by overheating to the valve element 3. The section of the valve core 3 is in a convex shape, so that the action range of the valve core 3 can be enlarged, and the unloading drift diameter during unloading is increased. If the shape is flat, the up-and-down movement space is small. The diameter of the top of the valve core 3 is larger than that of the convex ring 102, so that the valve core 3 can completely seal the bottom of the air inlet cavity 101 better, the sealing effect is further improved, and gas leakage is prevented. And the height difference is formed between the top of the valve core 3 and the two sides, so that the valve core 3 can better enter the gas outlet cavity 103 when being opened, and gas can be discharged more quickly.

The bottom surface of case 3 and valve gap 2 and between form cooperation chamber 201, the middle of cooperation chamber 201 vertically sets up spring 4, and spring 4's upper and lower both ends support respectively on case 3 and valve gap 2, fixed connection in the middle of

screw

41 and 3 tops of case is passed through to spring 4's upper end, be convenient for better control spring 4 and case 3's joint strength through screw 41, it is not hard up to prevent to produce between spring 4 and the case 3, cause opening and closing of unable effectual realization case 3. A hard support plate 42 is arranged below the flexible sealing disk and the air outlet sealing part, the hard support plate 42 is also fixed below the flexible sealing disk through a screw 41, and the diameter of the hard support plate 42 is consistent with that of the convex ring 102. Better support is provided by the rigid support plate 42.

The spring 4 is a tower spring. And the center of the spring 4 is aligned with the center of the control air port 202, the elasticity of the spring 4 is relatively small, and the functions of resetting and increasing the sealing performance are achieved. If the spring force 4 is too great. The valve element 3 is not operated and cannot be opened, and the control is performed by matching the control port 202. The diameter of the lower part of the spring 4 is larger than that of the upper part, so that the spring 4 can support more stably, the stress effect of the bottom of the spring 4 is improved, and the valve core 3 is prevented from being deviated or inclined when acting.

During specific work, the air inlet cavity 101 is connected with an exhaust pipeline of the blower body, the electromagnetic control valve is in a power-off state, and the valve core 3 is in a closed state under the action of the spring 4 in a shutdown state of the blower body. When the blower body normally operates in a loading stage, gas with certain pressure and flow rate enters the gas inlet pipe 101, the electromagnetic control valve is opened, so that the pressure of the gas in the gas inlet pipe 101 is the same as the pressure of the gas introduced from the control gas port 202, and because the stress area of the bottom surface of the top of the valve core 3 is larger than the top surface of the top of the valve core 3, the pressure below the valve core 3 is larger than the pressure above the valve core 3, so that the valve core 3 is supported at the lower part of the gas inlet cavity 101, and the valve core 3 is in a.

In the unloading stage of the blower body, the pressure of the gas introduced into the matching cavity 201 is released through the control of the electromagnetic control valve, so that the pressure below the valve core 3 is smaller than the pressure above the valve core 3, the valve core 3 is driven to move downwards through the gas pressure, a gas circulation gap is formed between the upper side of the valve core 3 and the bottom of the gas inlet cavity 101, and the gas flows into the gas outlet cavity 103 and is discharged from the gas outlet 104.

Through the simple and ingenious structural design of this atmospheric valve, the effectual control case 3 of being convenient for is opened and is closed to effectual realization effect of letting out air. This atmospheric valve structure is provided with bulge loop 102 through the bottom outer wall of intake pipe 101 and is convenient for when matching with case 3, make the lifting surface area of case 3 top bottom surface be greater than case 3 top surface, thereby be convenient for make intake pipe 101 and control gas port 202 let in when equaling pressure gas, can make spring 4 support case 3 in the chamber 101 bottom of admitting air, and seal case 3 and valve body 1, be convenient for better control, need not to calculate the difference, be convenient for further promote sealed effect and sealed convenience. The section of the valve core 3 is in a convex shape, so that a larger space is formed between the valve core 3 and the air outlet cavity 103, and the air is discharged conveniently. Better be connected with case 3 through the top of spring 4, also further promoted the atress effect of spring 4 bottom simultaneously, prevent that case 3 from taking place the skew when the action.

To sum up, the air suspension centrifugal blower functions as: 1. during the starting-up stage, the emptying valve is in the unloading stage, so that the air suspension centrifugal blower is prevented from being started under pressure; 2. when the operation curve is close to the surge line, unloading is carried out through the emptying valve, so that the operation curve is far away from the surge line, and the purpose of preventing surge is achieved; 3. when the gas pressure in the pipeline or the equipment exceeds a specified value, the gas is prevented from being unloaded through the emptying valve, so that the safety protection is achieved.

Claims

1. An air suspension blower emptying valve is characterized by comprising a valve body (1), a valve cover (2) and a valve core (3); the middle part of the valve body (1) is longitudinally provided with an air inlet pipe (101), the air inlet pipe (101) extends downwards to the inside of the valve body (1) to divide the inside of the valve body (1) into an air inlet cavity and an air outlet cavity (103), the air outlet cavity (103) is arranged on the outer ring of the air inlet cavity, and one side of the air outlet cavity (103) is provided with an air outlet pipe (104); valve gap (2) seal to connect and set up in valve body (1) bottom, are provided with control gas port (202) in the middle of the bottom of valve gap (2), case (3) be located between valve body (1) and valve gap (2), the main part of case (3) is flexible seal dish, valve gap (2) and valve body (1) are kept apart to flexible seal dish seal, after control gas port (202) aerify, the gas outlet that can seal intake pipe (101) bottom when flexible seal dish atress rises.

2. The atmospheric air suspension blower vent valve of claim 1, characterized in that, a matching cavity (201) is formed between the bottom surface of the valve core (3) and the valve cover (2), a spring (4) is longitudinally arranged in the middle of the matching cavity (201), and the upper and lower ends of the spring (4) are respectively abutted against the valve core (3) and the valve cover (2).

3. An air suspension blower blow-down valve as claimed in claim 1, characterised in that the bottom outer ring of the inlet pipe (101) is provided with a protruding ring (102).

4. An air suspension blower blow-down valve according to claim 1, characterised in that the spring (4) is a tower spring.

5. An air suspension blower blow-down valve as in claim 1 wherein the flexible sealing disk is of a convex cross-section and a rigid support plate (42) is positioned below the flexible sealing disk and the air outlet seal, the rigid support plate (42) being secured below the flexible sealing disk by screws (41).

6. An air suspension blower blow down valve according to claim 5, wherein the outer edge of the flexible sealing disk extends to the junction of the valve cover (2) and the valve body (1) sealing the junction between the valve cover (2) and the valve body (1).

7. The air suspension blower blow-down valve of claim 5, wherein the flexible sealing disk is made of a temperature-resistant silicone material or temperature-resistant rubber.

8. An air suspension blower blow-down valve as claimed in claim 1, characterised in that a solenoid operated valve is connected to the control air port (202).

9. An air suspension blower, characterized in that the blower comprises a blower body and a blow-off valve as claimed in any one of claims 1 to 8, the blow-off valve being connected to the blower body.