Exhaust valve structure for self-priming pump

Abstract

The utility model discloses a kind of exhaust valve structures for self-priming pump, including valve body, the valve body is connected with bonnet by bolt, the valve body bottom is provided with air inlet, side is provided with blow-off port, the bonnet one side is provided with exhaust port, the valve body air inlet is provided with isolation orifice plate, for buffering the impact of import gas liquid pressure to floating ball, floating ball connecting assembly is provided in the valve body, the floating ball connecting assembly is connected with elastic valve core assembly, the elastic valve core assembly passes through the conical hole of bonnet middle part and extends into bonnet cavity.This utility model structure is simple, adopt floating ball connecting rod structure, valve core opening and closing easily;Adopt elastic valve core assembly, conical surface elastic sealing, not easy to scale;Utilize isolation orifice plate buffering import gas liquid pressure to the impact of floating ball, prevent valve core normal opening and closing failure, realize quick gas-liquid separation discharge.

Description

Technical Field

[0001] This utility model relates to the field of exhaust valve technology, and in particular to an exhaust valve structure for a self-priming pump. Background Technology

[0002] The working process of a gas-liquid mixing self-priming pump: Due to the special structure of the pump body, after the pump stops, a certain amount of water remains in the pump body. When the self-priming pump restarts, the air and water in the suction pipe are fully mixed due to the impeller rotation and discharged into the gas-liquid separation chamber. The gas in the upper part of the gas-liquid separation chamber overflows, and the water in the lower part returns to the impeller to mix with the remaining air in the suction pipe again until all the gas in the self-priming pump and suction pipe is discharged, completing the self-priming process and allowing normal water pumping. After the self-priming process is completed, the self-priming pump is in normal working condition, and the exhaust valve should be closed. At this time, it is necessary to use a solenoid valve or manually close the exhaust valve. However, solenoid valves usually have disadvantages such as difficulty in connecting electricity and the need for fire and explosion prevention. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems and provide an exhaust valve structure for a self-priming pump to achieve automatic exhaust.

[0004] To achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by this utility model is: a self-priming pump exhaust valve structure, including a valve body, a valve cover connected to the valve body by bolts, an air inlet at the bottom of the valve body, a drain outlet on the side, an exhaust outlet on one side of the valve cover, an isolation plate at the air inlet of the valve body for buffering the impact of the inlet gas-liquid pressure on the float, a float connecting rod assembly inside the valve body, the float connecting assembly being connected to an elastic valve core assembly, and the elastic valve core assembly extending into the valve cover cavity through a conical hole in the middle of the valve cover.

[0005] Preferably, the float connecting rod assembly includes a connecting rod disposed on the valve body, one end of the connecting rod being connected to the float and the other end being connected to the elastic valve core assembly, and the float being disposed within the isolation orifice plate.

[0006] Preferably, the resilient valve core assembly includes a valve stem, on which a valve core is disposed, and at the upper end of the valve stem, a spring is disposed.

[0007] Preferably, the outer surface of the valve core is provided with a tapered portion, which mates with the tapered hole in the middle of the valve cover.

[0008] Preferably, one end of the spring is disposed in a groove on the inner surface of the valve cover, and the other end is disposed on the protrusion at the upper end of the valve core.

[0009] Compared with traditional structures, this utility model offers the following advantages: It features a simple structure with a float-and-rod design, facilitating easy valve core opening and closing; it employs an elastic valve core assembly with a conical elastic seal, preventing scale buildup; and it utilizes an isolation orifice plate to buffer the impact of inlet gas-liquid pressure on the float, preventing valve core malfunction and enabling rapid gas-liquid separation and discharge. It can be widely used in wastewater treatment, slurry and fiber conveying processes in industries such as petrochemicals, power, and steel. It can also be applied to the outlet of various self-priming pumps, eliminating the drawbacks of solenoid valves such as difficult power connection and fire / explosion prevention issues. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] In the diagram: 1. Elastic valve core assembly, 2. Float connecting rod assembly, 3. Isolation orifice plate, 4. Valve body, 5. Bolt, 6. Valve cover, 7. Spare port, 8. Exhaust port, 9. Drain port, 10. Air inlet. Detailed Implementation

[0012] The present invention will be further described below.

[0013] See attached document Figure 1 A self-priming pump exhaust valve structure includes a valve body 4, a valve cover 6 connected to the valve body 4 by bolts 5, an air inlet 10 at the bottom of the valve body 4 and a drain outlet 9 on the side, an exhaust outlet 8 on one side of the valve cover 6 and a spare outlet 7 at the top, an isolation plate 3 at the air inlet 10 of the valve body 4 for buffering the impact of the inlet gas-liquid pressure on the float 2-1, a float connecting rod assembly 2 inside the valve body 4, the float connecting assembly 2 being connected to an elastic valve core assembly 1, and the elastic valve core assembly 1 extending into the valve cover cavity through a conical hole in the middle of the valve cover 6.

[0014] In this preferred embodiment, the float connecting rod assembly 2 includes a connecting rod 2-2 disposed on the valve body. One end of the connecting rod 2-2 is connected to the float 2-1, and the other end is connected to the elastic valve core assembly 1. The float 2-1 is disposed in the isolation orifice plate 3.

[0015] In this preferred embodiment, the elastic valve core assembly 1 includes a valve stem 1-2, a valve core 1-1 is disposed on the valve stem 1-2, and a spring 1-3 is disposed on the upper end of the valve stem 1-2.

[0016] In this preferred embodiment, the outer surface of the valve core 1-1 is provided with a tapered portion, which cooperates with the tapered hole in the middle of the valve cover 6.

[0017] In this preferred embodiment, one end of the spring 1-3 is disposed in a groove on the inner surface of the valve cover 6, and the other end is disposed on the protrusion at the upper end of the valve core 1.

[0018] In specific implementation, the working principle of this utility model is as follows: When the self-priming pump starts to exhaust, the gas-liquid mixture enters the valve chamber through the air inlet 10, and part of the gas-liquid mixture is discharged through the exhaust port 8 through the valve core. As the liquid level rises, it drives the float connecting rod assembly 2 to automatically close the valve core and complete the exhaust process. After the pump stops, part of the liquid level drops, and the float connecting rod assembly 2 floats down and automatically opens the valve core to complete the air intake process, preventing the liquid level in the pump box from dropping due to the siphon principle and being unable to self-prime again.

[0019] The new exhaust valve operates as follows: liquid pressure rises → float moves upward and connecting rod moves → valve core closes, exhaust is completed; after pump stops, liquid pressure drops → float moves downward and connecting rod moves → valve core opens, intake is completed → pump box liquid level stabilizes.

[0020] The above embodiments of this utility model are merely examples to clearly illustrate this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent technical solutions also fall within the scope of this utility model, and the patent protection scope of this utility model should be defined by each claim.

Claims

1. A structure for an exhaust valve for a self-priming pump, comprising a valve body (4), characterized in that: The valve body (4) is connected to the valve cover (6) by bolts (5). The bottom of the valve body (4) is provided with an air inlet (10) and the side is provided with a drain outlet (9). The valve cover (6) is provided with an exhaust outlet (8) on one side. The air inlet (10) of the valve body (4) is provided with an isolation plate (3) to buffer the impact of the inlet gas and liquid pressure on the float (2-1). The valve body (4) is provided with a float connecting rod assembly (2). The float connecting assembly (2) is connected to the elastic valve core assembly (1). The elastic valve core assembly (1) extends into the valve cover cavity through the conical hole in the middle of the valve cover (6).

2. The exhaust valve structure for a self-priming pump according to claim 1, characterized in that: The float connecting rod assembly (2) includes a connecting rod (2-2) disposed on the valve body. One end of the connecting rod (2-2) is connected to the float (2-1), and the other end is connected to the elastic valve core assembly (1). The float (2-1) is disposed inside the isolation orifice plate (3).

3. The structure of the exhaust valve for the self-priming pump according to claim 1, characterized in that: The elastic valve core assembly (1) includes a valve stem (1-2), a valve core (1-1) is provided on the valve stem (1-2), and a spring (1-3) is provided at the upper end of the valve stem (1-2).

4. The exhaust valve structure for a self-priming pump according to claim 3, characterized in that: The outer surface of the valve core (1-1) is provided with a tapered part, which cooperates with the tapered hole in the middle of the valve cover (6).

5. The exhaust valve structure for a self-priming pump according to claim 3, characterized in that: One end of the spring (1-3) is located in the groove on the inner surface of the valve cover (6), and the other end is located at the protrusion on the upper end of the valve core (1-1).

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