Combined emptying valve for air compression pipeline

Abstract

The utility model relates to a combined emptying valve for an air compression pipeline. The device comprises an emptying valve, an air inlet of the emptying valve is connected to an outlet pipeline of the air blower, and an air outlet of the emptying valve is connected to the atmosphere; an inlet of the electromagnetic reversing valve is connected to a control port of the emptying valve, and an outlet of the electromagnetic reversing valve is connected to the atmosphere; and the outlet pipeline of the air blower is connected to the atmosphere through the electric butterfly valve. When the air blower is shut down, the electromagnetic reversing valve is powered off, an outlet of the electromagnetic reversing valve is communicated with the atmosphere, the emptying valve is quickly opened, the pressure of an outlet pipeline of the air blower is released, and the electric butterfly valve is slowly opened; when the air blower is started, the electromagnetic valve is powered on and closed, the emptying valve is rapidly closed, and the electric butterfly valve is slowly closed. The quick-opening and slow-closing functions of the combined emptying valve are realized by utilizing the quick-opening characteristic of quick-opening and quick-closing of the emptying valve and the slow-closing characteristic of slow-opening and slow-closing of the electric butterfly valve, so that the impact damage to the associated fan when the fan is started and connected to a grid is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially is a kind of combination vent valve for air compression pipeline. BACKGROUND

[0002] In the existing sewage treatment technology, multiple single-stage high-speed centrifugal blowers are used to supply air to the main pipe, and a vent valve and a check valve are sequentially arranged between the outlet of each blower and the main pipe. When the blower is stopped, the vent valve is quickly opened to release the pressure at the outlet of the blower to prevent back pressure from damaging the blower. When the blower is started, the vent valve is in an open state to prevent the blower from starting under pressure. After the blower operates normally, the vent valve is closed, and the pressure air opens the check valve to connect with the main pipe.

[0003] However, since the existing vent valve is a quick-opening and quick-closing type valve, the quick closing of the vent valve causes a certain impact on other associated blowers that are running when the blower is started and connected to the main pipe, especially on the magnetic suspension blower, which has become a major safety hazard. SUMMARY

[0004] Therefore, the utility model provides a combination vent valve for air compression pipeline, which can realize the quick opening and slow closing of the vent valve and avoid the adverse effects on other associated blowers when the blower is started and connected to the grid.

[0005] To solve the above technical problems, the utility model provides a combination vent valve for air compression pipeline, comprising:

[0006] a vent valve, an air inlet of the vent valve connected to the outlet pipe of the blower, and an air outlet of the vent valve connected to the atmosphere;

[0007] an electromagnetic directional valve, an inlet of the electromagnetic directional valve connected to the control port of the vent valve, and an outlet of the electromagnetic directional valve connected to the atmosphere;

[0008] an electric butterfly valve, and the outlet pipe of the blower connected to the atmosphere through the electric butterfly valve.

[0009] In one embodiment of the utility model, the electromagnetic directional valve is a two-position two-normal-open electromagnetic valve.

[0010] In one embodiment of the utility model, the vent valve comprises:

[0011] a valve body, the air inlet arranged at the side end of the valve body, and the air outlet arranged at the bottom end of the valve body;

[0012] a valve cover, arranged at the upper end of the valve body, the valve cover provided with a seat body, and the seat body provided with the control port;

[0013] A U-shaped opening of the U-shaped opening and closing member faces the valve cover, and an outer wall of a bottom end of the U-shaped opening and closing member extends outward to provide a sealing seat, the sealing seat is provided with a sealing element capable of sealingly contacting an end surface of the gas outlet, and an outer diameter circle area of the contact between the two is smaller than an outer diameter circle area of the U-shaped opening and closing member;

[0014] A compression spring is arranged between the seat body and the inner wall of the bottom end of the U-shaped opening and closing member to provide a force for the sealing element to tightly contact the end surface of the gas outlet;

[0015] An intermediate sleeve is arranged between the valve body and the valve cover, and a middle cavity of the vent valve is formed between the U-shaped opening and closing member, the intermediate sleeve and the valve cover, and a gap is left between an outer diameter circle of the U-shaped opening and closing member and an inner diameter circle of the intermediate sleeve.

[0016] In an embodiment of the utility model, the compression spring is tapered and shrinks in the direction away from the sealing seat.

[0017] In an embodiment of the utility model, the gap is 0.2-0.5mm.

[0018] In an embodiment of the utility model, the upper end of the intermediate sleeve extends radially outward to have a mounting edge, and the inner wall of the upper end of the valve body is provided with a support step for supporting the mounting edge.

[0019] In an embodiment of the utility model, the valve cover and the valve body are connected through a screw.

[0020] In an embodiment of the utility model, the sealing element comprises a rubber sealing ring.

[0021] In an embodiment of the utility model, a gap ring is arranged between the sealing seat and the end surface of the gas outlet.

[0022] The above technical solution of the utility model has the following advantages compared with the prior art:

[0023] The combined vent valve for the air compression pipeline enables the electromagnetic reversing valve to be powered off when the air blower is powered off, the outlet of the electromagnetic reversing valve is connected with the atmosphere, the vent valve is quickly opened at this time, the air blower outlet pipeline pressure is released, and the electric butterfly valve is slowly opened at the same time; when the air blower is powered on, the electromagnetic valve is powered on and closed, the vent valve is quickly closed at this time, and the electric butterfly valve is slowly closed at the same time. The quick opening feature of the quick opening and closing of the vent valve and the slow closing feature of the slow opening and closing of the electric butterfly valve are utilized to realize the function of the quick opening and slow closing of the combined vent valve, so that the impact damage to the associated air blower when the air blower is powered on and connected in the prior art is avoided, and remote and intelligent control can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed.

[0025] Figure 1 It is the principle diagram of the combined vent valve for air compression pipeline of the utility model.

[0026] Figure 2 It is the structure diagram of the vent valve of the utility model.

[0027] Description of the drawings of the specification:

[0028] 1, vent valve;11, valve body;1A, air inlet;1B, air outlet;12, intermediate sleeve;121, installation edge;13, U-shaped opening and closing part;14, compression spring;15, valve cover;151, control port;16, screw;17, sealing element;18, sealing seat;181, gap ring;

[0029] 2, electromagnetic reversing valve;3, electric butterfly valve;A, blower outlet pipeline;B, atmosphere. Specific embodiments

[0030] The utility model is further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0031] In the utility model, if the direction (up, down, left, right, front and back) is described, it is only for the convenience of describing the technical scheme of the utility model, and is not indicated or implied that the indicated technical features must have a specific orientation, structure and operation, so it cannot be understood as the limitation of the utility model.

[0032] In the utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "more than" "less than" "exceed" and the like are understood as not including the number;"Above" "below" "within" and the like are understood as including the number. In the description of the utility model, if "first" "second" is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0033] In the utility model, unless otherwise specifically limited, the words such as ''set'', ''install'' and ''connect'' should be understood in a broad sense, for example, it can be directly connected, and it can also be indirectly connected through an intermediate medium; it can be fixedly connected, and it can also be detachably connected, and it can also be integrally formed; it can be mechanically connected, and it can also be electrically connected or capable of intercommunication; it can be the communication or interaction relationship of two elements inside two elements. The skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0034] Referring to Figure 1 The utility model relates to a combination vent valve for air compression pipeline 1, it includes:

[0035] Vent valve 1, the air inlet 1A of vent valve 1 is connected to the blower outlet pipeline A, and the air outlet 1B of vent valve 1 is connected to the atmosphere B.

[0036] Electromagnetic reversing valve 2, the inlet of electromagnetic reversing valve 2 is connected to the control port 151 of vent valve 1, and the outlet of electromagnetic reversing valve 2 is connected to the atmosphere B.

[0037] Electric butterfly valve 3, the blower outlet pipeline A is connected to the atmosphere B through electric butterfly valve 3.

[0038] In an embodiment, the electromagnetic reversing valve 2 is a two-position two-normal-open electromagnetic valve.

[0039] It should be noted that when the blower is turned off, the electromagnetic reversing valve 2 is powered off, the outlet of the electromagnetic reversing valve 2 is connected to the atmosphere B, at this time the vent valve 1 is quickly opened, the blower outlet pipeline A pressure is released, and at the same time the electric butterfly valve 3 is slowly opened.

[0040] When the blower is turned on, the electromagnetic reversing valve 2 is powered on and closed, at this time the vent valve 1 is quickly closed, and at the same time the electric butterfly valve 3 is slowly closed. The quick opening feature of the quick opening and quick closing of the vent valve 1 and the slow closing feature of the slow opening and slow closing of the electric butterfly valve 3 are used to realize the function of quick opening and slow closing of the combination vent valve 1, so as to avoid the impact damage to the associated blower when the blower is turned on and connected to the grid (the blower is connected to the grid before the electric butterfly valve 3 is closed).

[0041] Referring to Figure 2 The vent valve 1 includes:

[0042] Valve body 11, the air inlet 1A is arranged at the side end of the valve body 11, and the air outlet 1B is arranged at the bottom end of the valve body 11.

[0043] Valve cover 15, arranged on the upper end of the valve body 11, the valve cover 15 is provided with a seat body, and the seat body is provided with the control port 151.

[0044] A U-shaped opening of the U-shaped opening and closing member 13 faces the valve cover 15, and an outer wall of a bottom end of the U-shaped opening and closing member 13 extends outwardly to provide a sealing seat 18, the sealing seat 18 is provided with a sealing member 17 capable of sealingly contacting an end surface of the gas outlet 1B, and an outer diameter circular area of the contact between the two is smaller than an outer diameter circular area of the U-shaped opening and closing member 13;

[0045] A compression spring 14 is arranged between the seat body and an inner wall of the bottom end of the U-shaped opening and closing member 13 to provide a force for the sealing member 17 to tightly contact the end surface of the gas outlet 1B.

[0046] An intermediate sleeve 12 is arranged between the valve body 11 and the valve cover 15, and a middle cavity of the vent valve 1 is formed between the U-shaped opening and closing member 13, the intermediate sleeve 12 and the valve cover 15, and a gap is left between an outer diameter circle of the U-shaped opening and closing member 13 and an inner diameter circle of the intermediate sleeve 12.

[0047] Specifically, the compression spring 14 is tapered and shrinks in a direction away from the sealing seat 18.

[0048] Specifically, the gap is 0.2-0.5mm.

[0049] Specifically, an upper end of the intermediate sleeve 12 extends radially outwardly to provide a mounting edge 121, and an inner wall of an upper end of the valve body 11 is provided with a support step for supporting the mounting edge 121.

[0050] Specifically, the valve cover 15 and the valve body 11 are connected by a screw 16 (the contact surfaces of the two are sealed).

[0051] Specifically, the sealing member 17 includes a rubber sealing ring.

[0052] Specifically, a gap ring 181 is arranged between the sealing seat 18 and the end surface of the gas outlet 1B.

[0053] The opening and closing principle of the vent valve 1 is as follows:

[0054] (1) When the air blower is off, the electromagnetic reversing valve 2 is de-energized, the middle cavity of the vent valve 1 is depressurized (close to atmospheric pressure), and due to the difference between the outer diameter circle area of the U-shaped opening and closing element 13 and the outer diameter circle area of the sealing element 17 in contact with the valve body 11, an upward force F is generated under the pressure of the inlet port 1A and the middle cavity. When F is greater than the sum of the pressure of the compression spring 14 and the gravity of the U-shaped opening and closing element 13, the U-shaped opening and closing element 13 moves upward, the vent valve 1 is quickly opened, and the pressure air of the inlet port 1A is discharged into the atmosphere through the outlet port 1B; as the pressure of the inlet port 1A decreases, F rapidly decreases, the U-shaped opening and closing element 13 moves downward, the sealing element 17 tightly closes the end surface of the outlet port 1B, and the residual pressure of the inlet port 1A enters the middle cavity through the gap and is discharged into the atmosphere through the control port 151.

[0055] (2) When the air blower is on, the electromagnetic reversing valve 2 is energized to close, the pressure air at the inlet port 1A quickly enters the middle cavity through the gap between the intermediate sleeve 12 and the U-shaped opening and closing element 13, the difference between the sum of the downward thrust generated by the air pressure, the pressure of the compression spring 14 and the gravity of the U-shaped opening and closing element 13 and F is quickly greater than the sealing specific pressure of the sealing element 17, and the vent valve 1 is quickly closed and sealed.

[0056] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model, and they should be covered in the scope of the claims of the utility model.

Claims

1. A combined vent valve (1) for air pressure lines, characterized in that The invention relates to a kind of air release valve, comprising: Air release valve (1), the air inlet (1A) of the air release valve (1) is connected to the outlet pipeline (A) of air blower, the air outlet (1B) of the air release valve (1) is connected to the atmosphere (B); Electromagnetic reversing valve (2), the inlet of the electromagnetic reversing valve (2) is connected to the control port (151) of the air release valve (1), and the outlet of the electromagnetic reversing valve (2) is connected to the atmosphere (B); Electric butterfly valve (3), the outlet pipeline (A) of air blower is connected to the atmosphere (B) through the electric butterfly valve (3).

2. A combined vent valve (1) for air line according to claim 1, characterized in that, The electromagnetic reversing valve (2) is a two-position two normally open electromagnetic valve.

3. A combined vent valve (1) for air line according to claim 1, characterized in that, The air release valve (1) comprises: Valve body (11), the air inlet (1A) is arranged at the side end of the valve body (11), and the air outlet (1B) is arranged at the bottom end of the valve body (11); Valve cover (15), arranged on the upper end of the valve body (11), the valve cover (15) is provided with a seat body, and the seat body is provided with the control port (151); U-shaped opening and closing element (13), arranged in the valve body (11), and the U-shaped opening of the U-shaped opening and closing element (13) faces the valve cover (15), the outer wall of the bottom end of the U-shaped opening and closing element (13) extends outwardly and is provided with a sealing seat (18), the sealing seat (18) is provided with a sealing element (17) capable of sealingly contacting the end face of the air outlet (1B), and the contact area between the two is smaller than the outer diameter circle area of the U-shaped opening and closing element (13); Compression spring (14), arranged between the seat body and the inner wall of the bottom end of the U-shaped opening and closing element (13), to provide the force for the sealing element (17) to tightly contact the end face of the air outlet (1B); Intermediate sleeve (12), arranged between the valve body (11) and the valve cover (15), the U-shaped opening and closing element (13), the intermediate sleeve (12) and the valve cover (15) form a middle cavity of the air release valve (1), and a gap is left between the outer diameter circle of the U-shaped opening and closing element (13) and the inner diameter circle of the intermediate sleeve (12).

4. A combined vent valve (1) for air line according to claim 3, characterized in that, The compression spring (14) is tapered, and is contracted in the direction away from the sealing seat (18).

5. A combined vent valve (1) for air line according to claim 3, characterized in that, The size of the gap is 0.2-0.5mm.

6. A combined vent valve (1) for air line according to claim 3, characterized in that, The upper end of the intermediate sleeve (12) extends radially outwardly and has a mounting edge (121), and the inner wall of the upper end of the valve body (11) is provided with a support step for supporting the mounting edge (121).

7. A combined vent valve (1) for air line according to claim 3, characterized in that, The valve cover (15) and the valve body (11) are connected by a screw (16).

8. A combined vent valve (1) for air line according to claim 3, characterized in that, The sealing element (17) comprises a rubber sealing ring.

9. A combined vent valve (1) for air line according to claim 3, characterized in that, The sealing seat (18) and the end face of the air outlet (1B) are provided with a gap ring (181).

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