A windbox air valve

Abstract

The application relates to the technical field of air valves, and particularly discloses an air valve for a wind box, which comprises a valve body, a fixed box is arranged on the outer surface of the valve body, a fan blade shaft is arranged in the fixed box, a fixed plate is arranged on the inner wall of the valve body, one end of the fan blade shaft penetrates the inner wall of the fixed box, the outer surface of the valve body and the fixed plate in sequence and extends into the valve body, a cylinder and an electromagnetic valve connected with the cylinder are arranged in the valve body, a three-way joint is fixedly connected to the cylinder, a gear is fixedly installed at one end of the fan blade shaft in the valve body, a slidable rack is arranged in the valve body and engaged with the gear, a piston of the cylinder is connected with the rack, the cylinder is extended and retracted to drive the rack to slide, and then the rack drives the gear to rotate and drives the fan blade shaft to rotate; the reciprocating movement of the piston of the cylinder is controlled by the electromagnetic valve to realize the opening and closing of the air valve; the transmission mode is more direct, the structure is simpler, the gear and the rack are in linear contact, the contact area is larger, the gear and the rack can bear larger radial load and impact load, and the air valve can be operated at a high frequency.

Description

Technical Field

[0001] This utility model relates to the field of air valve technology, specifically an air valve for a bellows. Background Technology

[0002] Air-pulsating jigs use water as the mineral processing medium. Through alternating pulsating water flow, materials are stratified according to density, thus achieving separation. This pulsating water flow is the basic water flow for jigging separation and is controlled by the jig's air valve. The air valve is a key component of the jig, and its performance plays a decisive role in the separation effect. For materials to achieve good stratification, firstly, the pulsating water flow should have sufficient upward acceleration to lift the entire bed and maintain a relatively long loosening time for material to shift and stratify; secondly, a jigging system favorable to the separation of different coal qualities should be adopted. Therefore, the air valve should be able to open quickly and be flexibly adjusted to a suitable pulsating waveform for separation to obtain good separation results.

[0003] Air valves typically have an air inlet and an air outlet. The air inlet is connected to the air box, and the air outlet is connected to the air chamber of the jig. In the prior art, air valves are classified into sliding air valves and rotary air valves based on their structure. With the development of electronic control technology, electro-pneumatic air valves have emerged, enabling precise control of air intake and exhaust. The frequency of the air valve can be adjusted, allowing for large and rapid air intake, which increases the amplitude of the jig's vibration and thus improves its processing capacity. For example, patent CN209953040U discloses a pulse-controlled air valve for a jig. The system includes a valve body with a fixed housing on its outer surface. Inside the fixed housing is a fan shaft. A fixed plate is fixedly connected to the inner wall of the valve body. One end of the fan shaft passes through the inner wall of the fixed housing, the outer surface of the valve body, and the outer surface of the fixed plate, extending to the other side of the fixed plate. A crank is fixedly connected to the end of the fan shaft near the fixed plate. A solenoid valve is fixedly connected to the inner top wall of the valve body. A cylinder is located at the bottom of the solenoid valve. A triplet is fixedly connected to the upper surface of the cylinder. A connecting sleeve is fixedly connected to one end of the cylinder, and a linear bearing is fitted inside the connecting sleeve. During operation, an external high-pressure air source is connected. The solenoid valve controls the reciprocating motion of the piston inside the cylinder. The cylinder is connected to the connecting sleeve, which, through the linear bearing, causes the sliding shaft to move up and down. The connecting rod moves horizontally under the action of the sliding shaft. After the connecting rod and the crank are connected by fasteners, the crank swings back and forth. Driven by the crank, the fan shaft swings back and forth, thus opening and closing the valve. The solution has the following drawbacks: the ball bearings of the linear bearing have point contact with the shaft, resulting in a small contact area and stress concentration, which limits their radial load-bearing capacity. Excessive radial load can cause the balls and raceways to develop indentations and deformations prematurely, accelerating wear and failure. When the damper is switched on and off at high frequencies, the fan shaft rotates at high frequency, and the linear bearings are prone to failure due to high-frequency radial impacts, which in turn leads to the failure of the entire damper. Utility Model Content

[0004] To address the shortcomings of existing technologies, the present invention provides a wind valve for bellows, which solves the problem that existing wind valves are prone to failure during high-frequency operation.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: a wind valve for a bellows, including a valve body, a fixed box on the outer surface of the valve body, a fan shaft inside the fixed box, a fixed plate on the inner wall of the valve body, one end of the fan shaft passing through the inner wall of the fixed box, the outer surface of the valve body and the fixed plate in sequence and extending into the valve body, a cylinder and a solenoid valve connected to the cylinder are provided in the valve body, a triple unit is fixedly connected to the cylinder, a gear is fixedly installed at one end of the fan shaft located in the valve body, a sliding rack is provided in the valve body and meshes with the gear, and the piston of the cylinder is connected to the rack.

[0006] Furthermore, the gear is installed with the fan blade shaft via a key engagement, and the gear is secured with a lock nut.

[0007] Furthermore, the gear is a helical gear, and the rack is a helical rack.

[0008] Furthermore, a lubrication mechanism is provided inside the valve body, and the lubrication mechanism is fixedly connected to the inner wall of the valve body.

[0009] Furthermore, the top of the triplet is fixedly connected to the solenoid valve.

[0010] Furthermore, the rack is provided with a sliding groove, and the valve body is provided with a sliding rail that slides in cooperation with the sliding groove.

[0011] The beneficial effects of this plan are: Compared to existing technologies, the wind valve for a bellows in this invention uses a cylinder to drive a rack and pinion to slide within the valve body, which in turn drives a gear to rotate, thus rotating the fan shaft. An electromagnetic valve controls the reciprocating motion of the cylinder piston to open and close the valve. This method offers a more direct transmission and a simpler structure. The gear and rack have line contact, resulting in a larger contact area and the ability to withstand greater radial and impact loads. Even during high-frequency operation, the valve is less prone to failure, improving its switching frequency range and service life while reducing maintenance costs. This wind valve can be configured into multiple groups to meet different needs, allowing for the individual control of one fan shaft or the control of multiple fan shafts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1-valve body, 2-fixed box, 3-fan blade shaft, 4-fixed plate, 5-cylinder, 6-solenoid valve, 7-triple unit, 8-gear, 9-locking nut, 10-rack, 11-slide rail. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Implementation, for example, attached Figure 1 As shown: A bellows valve includes a valve body 1, a fixed box 2 on the outer surface of the valve body 1, a fan shaft 3 inside the fixed box 2, and a fixed plate 4 on the inner wall of the valve body 1. One end of the fan shaft passes through the inner wall of the fixed box 2, the outer surface of the valve body 1, and the fixed plate 4 in sequence and extends into the valve body 1. A cylinder 5 and a solenoid valve 6 connected to the cylinder 5 are provided inside the valve body 1. A triplet 7 is fixedly connected to the cylinder 5. A gear 8 is fixedly installed at one end of the fan shaft 3 inside the valve body 1. The gear 8 and the fan shaft 3 are keyed together and fixed with a locking nut 9. A slidable rack 10 is provided inside the valve body 1. Gear 8 meshes, rack 10 has a sliding groove, and valve body 1 has a slide rail 11 that slides with the sliding groove. Gear 8 is a helical gear 8, and rack 10 is a helical rack 10, which can withstand large radial loads and impact loads. The piston of cylinder 5 is connected to rack 10. Cylinder 5 extends and retracts to drive rack 10 to slide. Valve body 1 has a lubrication mechanism, which is fixedly connected to the inner wall of valve body 1 to lubricate the transmission components inside valve body 1 and extend the service life of the air valve. The top of triplet 7 is fixedly connected to solenoid valve 6. Triplet 7 can stabilize the pressure of external air source to keep the air source in a constant state and protect cylinder 5.

[0015] In operation, the air valve is connected to an external high-pressure air source. The piston of cylinder 5 is controlled by solenoid valve 6 to reciprocate, causing rack 10 to slide within valve body 1, which in turn drives gear 8 to rotate reciprocally. This, in turn, drives the fan shaft 3 to rotate reciprocally, thus opening and closing the air valve. The gear 8 and rack 10 structure provides a more direct transmission, and the line contact of gear 8 and rack 10 results in a larger contact area, enabling it to withstand greater radial and impact loads. Even during high-frequency operation, the air valve is less prone to failure, improving its switching frequency range and service life, thereby reducing maintenance costs. The opening and closing angle of the air valve can be controlled by adjusting the stroke of cylinder 5, and the opening and closing frequency can be controlled by adjusting the extension and retraction speed of cylinder 5, improving the sorting effect of the jig.

[0016] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A wind valve for a bellows, comprising a valve body, a fixed box on the outer surface of the valve body, a fan shaft inside the fixed box, a fixed plate on the inner wall of the valve body, one end of the fan shaft passing through the inner wall of the fixed box, the outer surface of the valve body, and the fixed plate and extending into the valve body, a cylinder and a solenoid valve connected to the cylinder being disposed within the valve body, and a three-piece assembly fixedly connected to the cylinder, characterized in that: A gear is fixedly installed at one end of the fan shaft located in the valve body. A sliding rack is provided in the valve body and meshes with the gear. The piston of the cylinder is connected to the rack.

2. The air valve for a bellows according to claim 1, characterized in that: The gear is installed with the fan blade shaft via a key, and the gear is secured with a lock nut.

3. The air valve for a bellows according to claim 1, characterized in that: The gear is a helical gear, and the rack is a helical rack.

4. The air valve for a bellows according to claim 1, characterized in that: The valve body is equipped with a lubrication mechanism, which is fixedly connected to the inner wall of the valve body.

5. The air valve for a bellows according to claim 1, characterized in that: The top of the triplet is fixedly connected to the solenoid valve.

6. The air valve for a bellows according to claim 1, characterized in that: The rack is provided with a sliding groove, and the valve body is provided with a slide rail that slides in cooperation with the sliding groove.

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