Vacuum air breaking valve with adjustable negative pressure value

Abstract

The invention discloses a vacuum air breaking valve with an adjustable negative pressure value, and relates to the technical field of vacuum negative pressure sewage collection. The split-flow valve comprises a valve body, a split-flow top cover, a sliding valve rod, two special-shaped adjusting nuts, a pressing reset spring, a sealing rubber ring and a supporting adjusting spring. The flow dividing top cover is installed on the upper end face of the valve body in an expansion mode. According to the invention, the valve body is additionally arranged in a vacuum application system (a vacuum application system in the technical field of vacuum negative pressure sewage collection), when the negative pressure value of a certain area in the vacuum application system reaches the set value of the gas breaking valve, a large amount of gas can be sensitively triggered and rapidly supplemented, and when gas supplementing and closing are completed, the valve body is accurately reset and closed in time; the interface of the valve body is sealed by the rubber rings, so that the valve body is good in leakproofness and not prone to leakage, integrally designed, exquisite in structure, small in size, small in occupied space and convenient to install, the negative pressure value is accurate and adjustable by adopting threads to be matched with the spring, and the requirements for safety and functionality of different scenes and positions are met.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum negative pressure sewage collection, in particular to a vacuum air breaking valve with adjustable negative pressure value. Background Art

[0002] In vacuum application systems, for safety or functional requirements, when the vacuum negative pressure reaches the rated value, it is necessary to supplement gas. Especially in rural vacuum sewage collection systems, when the terminal valve of the vacuum collection unit is not opened, the entire system is in a negative pressure state. When the valve is opened, the system sucks in sewage and waste gas. After a few seconds, the valve closes. When the pressure sensor senses that the vacuum degree has dropped to a certain value, the vacuum pump starts working to guide the vacuum degree in the system to recover. However, sometimes the gas sucked in at the terminal of the vacuum collection unit is very small, or a large water seal and a large amount of dirt are formed in the pipeline. The vacuum degree provided by the vacuum pump station cannot restore the vacuum degree at the end of the system to normal because it is blocked, and the system is difficult to continue to operate normally. This requires adding an air replenishing device to quickly inhale a large amount of gas to destroy the dirt and water seal in the pipeline, so that the vacuum connection of the entire system is connected. The huge suction provided by the vacuum pump will then close the air replenishing device, and the system will return to normal use. However, the existing air break valves have many defects, such as fixed and non-adjustable negative pressure value, slow response, large size, small air intake, easy leakage of the valve body, difficult valve body reset, and high noise. In view of the above problems, the inventor proposes a vacuum breaker valve with adjustable negative pressure value to solve the above problems. Summary of the invention

[0003] In order to solve the problems of existing air breaker valves such as unadjustable negative pressure value, slow response, large size, small air intake, easy leakage, difficult reset and high noise; the purpose of the present invention is to provide a vacuum air breaker valve with adjustable negative pressure value.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a vacuum breaker valve with adjustable negative pressure value, the vacuum breaker valve comprising a valve body, a diverter top cover, a sliding valve stem, two special-shaped adjusting nuts, a compression reset spring, a sealing rubber ring and a support adjusting spring; The diversion top cover is expansion-tightened and installed on the upper end surface of the valve body; The middle part of the sliding valve stem is tensionedly connected to the sealing rubber ring, the compression reset spring is sleeved on the upper end of the sliding valve stem, and the support adjustment spring is sleeved on the lower end of the sliding valve stem; The outer sides of the two special-shaped adjusting nuts are both provided with threads, and the threads on the outer sides of the two special-shaped adjusting nuts are threadedly connected with the inner wall of the valve body; A circular hole is provided at the axis center position of the two special-shaped adjusting nuts, and the upper and lower ends of the sliding valve stem pass through the circular holes at the axis center position of the two special-shaped adjusting nuts, using a clearance fit.

[0005] Preferably, a plurality of small holes are opened on the top of the diversion cover.

[0006] Preferably, the valve body is a supporting and fixing part, a circular hole is opened at the middle position of the valve body, and the circular hole in the middle of the valve body is a lateral airflow inlet.

[0007] Preferably, the circular hole in the middle of the valve body adopts the external thread at the bottom and applies a vacuum system.

[0008] Preferably, a nut is provided above the thread of the external thread, and the nut is a hexahedron.

[0009] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by adding the valve body to the vacuum application system (the vacuum application system in the field of vacuum negative pressure sewage collection technology), when the negative pressure value in a certain area of ​​the vacuum application system reaches the set value of the air breaker valve, it can be sensitively triggered and a large amount of gas can be quickly replenished. When the air replenishment is completed and closed, the valve body is reset and closed in time and accurately. The valve body interface is sealed with rubber rings everywhere, with good airtightness and not easy to leak. The overall design is integrated, with a sophisticated structure and small size, small space occupation and easy installation. The internal thread and spring are matched to make the negative pressure value accurately adjustable to meet the safety and functional requirements of different scenes and locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 A schematic diagram of the opening structure of a vacuum breaker valve with adjustable negative pressure value provided in an embodiment of the present invention.

[0012] Figure 2 A schematic diagram of the closing structure of a vacuum breaker valve with adjustable negative pressure value provided in an embodiment of the present invention.

[0013] Figure 3 A three-dimensional appearance diagram of a vacuum breaker valve with adjustable negative pressure value provided in an embodiment of the present invention.

[0014] Figure 4 A parts diagram of a vacuum breaker valve with adjustable negative pressure value provided in an embodiment of the present invention.

[0015] In the figure: 11, diverter top cover; 12, sliding valve stem; 13, special-shaped adjusting nut; 14, compression reset spring; 15, sealing rubber ring; 16, valve body; 17, support adjusting spring;. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example: Figure 1-4 As shown, the present invention provides a vacuum breaker valve with adjustable negative pressure value, which includes a valve body 16, a diverter top cover 11, a sliding valve stem 12, two special-shaped adjusting nuts 13, a compression reset spring 14, a sealing rubber ring 15 and a support adjustment spring 17; The flow splitter cover 11 is installed on the upper end surface of the valve body 16 by expansion; The middle part of the sliding valve stem 12 is tensionedly connected with the sealing rubber ring 15, the compression reset spring 14 is sleeved on the upper end of the sliding valve stem 12, and the support adjustment spring 17 is sleeved on the lower end of the sliding valve stem 12; The outer sides of the two special-shaped adjusting nuts 13 are both provided with threads, and the threads on the outer sides of the two special-shaped adjusting nuts 13 are threadedly connected to the inner wall of the valve body 16; Circular holes are provided at the axial positions of the two special-shaped adjusting nuts 13, and the upper and lower ends of the sliding valve stem 12 pass through the circular holes at the axial positions of the two special-shaped adjusting nuts 13, with a clearance fit; by adjusting the position of the special-shaped adjusting nuts 13, the reset spring 14 and the support adjusting spring 17 are tightened or loosened, and the vacuum value of the relative opening or closing of the sliding valve stem 12 and the valve body 16 is set to adapt to different system functions or safety requirements.

[0018] The top of the split cover 11 is provided with a plurality of small holes, which serve as upper airflow inlets and disperse the airflow to reduce noise.

[0019] The valve body 16 is a supporting and fixing part. A circular hole is opened in the middle of the valve body 16 . The circular hole in the middle of the valve body 16 is a lateral air flow inlet.

[0020] The circular hole in the middle of the valve body 16 adopts the external thread at the bottom and applies the vacuum system.

[0021] A nut is arranged above the thread of the external thread, and the nut is a hexahedron, which is convenient for installation and maintenance.

[0022] See also Figure 1, the embodiment of the present invention is turned on in the application assembly: In the open state, the negative pressure in the applied vacuum system is less than the set vacuum value of the air breaker, and the downward force acting on the sliding valve stem 12 is less than the tension of the support adjustment spring 17. The support adjustment spring 17 pushes the sliding valve stem 12 and the sealing rubber ring 15 to move upward, and the compression reset spring 14 contracts, and a gap is formed between the sliding valve stem 12 and the valve body 16. Due to the pressure difference between the external air pressure and the applied vacuum system, the external gas enters the valve body 16 through the circular hole of the shunt top cover 11 and the middle side hole of the valve body 16 under the action of suction due to the pressure difference, and enters the applied vacuum system through the gap formed between the sliding valve stem 12 and the valve body 16 to replenish air; See also Figure 2 , the embodiment of the present invention is in a closed state in application assembly: In the closed state, the negative pressure in the applied vacuum system is greater than the vacuum value set by the air breaker valve. Due to the pressure difference between the external air pressure and the applied vacuum system, the downward force acting on the sliding valve stem 12 is greater than the tension of the support adjustment spring 17. The support adjustment spring 17 contracts, the compression reset spring 14 relaxes, the sliding valve stem 12 and the valve body 16 are closed, and the sealing rubber ring 15 is clamped, so that the applied vacuum system is isolated from the outside, the external gas cannot enter, and the air supply is stopped; See also Figure 3 , the airflow entry position in the application assembly of the embodiment of the present invention is: The airflow enters from two directions: horizontally and upwards. The small holes are evenly distributed 360° in the middle and on the top, making the airflow dispersed and stable, reducing noise. See also Figure 4 , the design optimization of the embodiment of the present invention in application assembly: Under the premise of ensuring the air intake volume, each component adopts the design concept of integration, simplicity and beauty, combined with the advantages of spring performance, making it small in size and sensitive in response, easy to install, use and maintain.

[0023] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. Negative pressure adjustable vacuum breaker, characterized by: The vacuum rupture valve comprises a valve body (16), a diversion top cover (11), a sliding valve stem (12), two special-shaped adjustment nuts (13), a compression return spring (14), a sealing rubber ring (15) and a support adjustment spring (17); The flow-dividing top cover (11) is expansion-tightly mounted on the upper end surface of the valve body (16); The middle portion of the sliding valve stem (12) is tensionedly connected to the sealing rubber ring (15), the compression return spring (14) is sleeved on the upper end portion of the sliding valve stem (12), and the support adjustment spring (17) is sleeved on the lower end portion of the sliding valve stem (12); The outer sides of the two special-shaped adjusting nuts (13) are both provided with threads, and the threads on the outer sides of the two special-shaped adjusting nuts (13) are threadedly connected to the inner wall of the valve body (16); A circular hole is provided at the axis center position of the two special-shaped adjusting nuts (13), and the upper and lower ends of the sliding valve stem (12) pass through the circular holes at the axis center position of the two special-shaped adjusting nuts (13) with a clearance fit.

2. The vacuum breaker with adjustable negative pressure value according to claim 1, characterized in that: The top of the diversion cover (11) is provided with a plurality of small holes.

3. The vacuum breaker with adjustable negative pressure value according to claim 1, characterized in that: The valve body (16) is a supporting and fixing part, and a circular hole is provided at the middle of the valve body (16). The circular hole in the middle of the valve body (16) is a lateral airflow inlet.

4. The vacuum breaker valve with adjustable negative pressure value as claimed in claim 3, characterized in that: The circular hole in the middle of the valve body (16) adopts the external thread at the bottom and applies the vacuum system.

5. The vacuum breaker with adjustable negative pressure value as claimed in claim 4, characterized in that: A nut is arranged above the thread of the external thread, and the nut is a hexahedron.

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