Emptying valve for sewage treatment air compression pipeline

Abstract

The utility model relates to an emptying valve for a sewage treatment air compression pipeline. The valve body is provided with an air inlet, a valve body throttling opening and an air outlet; the valve cover is provided with a valve cover throttling port and a control port; the outer wall of the bottom end of the U-shaped opening and closing piece extends outwards to be provided with a sealing seat, and the sealing piece can make sealing contact with the end face of the air outlet; the compression spring provides force for the sealing element to cling to the end face of the air outlet; the middle sleeve can move in the axial direction and is arranged outside the U-shaped opening and closing piece in a sleeving mode, a sealing component is arranged between the middle sleeve and the U-shaped opening and closing piece, and a middle cavity is formed among the U-shaped opening and closing piece, the middle sleeve and the valve deck; the throttling valve is connected between the valve body throttling opening and the valve cover throttling opening; and 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. The problem that other associated blowers which are running are impacted when the blowers are started and merged into the mother pipe due to quick closing of the emptying valve is solved.

Description

TECHNICAL FIELD

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

[0002] In the existing sewage treatment process, usually adopt multiple single-stage high-speed centrifugal blower to be jointly supplied with gas for main pipe, the outlet of each blower is sequentially installed with vent valve and check valve at main pipe connection place. When blower stops, vent valve opens rapidly, and the residual pressure at outlet is rapidly released to prevent back pressure from causing damage to blower. When blower starts, vent valve remains open state to avoid blower starting under pressure, and vent valve is closed after blower runs stably, so that pressure air pushes check valve to open and connect with main pipe.

[0003] However, since the currently used vent valve is fast opening and fast closing type, its rapid closing in the process of blower starting and connecting with main pipe will cause impact on other running and associated blowers, especially the impact on magnetic suspension blower is particularly obvious, which has become a major safety hazard. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that rapid closing of vent valve in prior art causes impact on other running and associated blowers when blower starts and connects with main pipe.

[0005] To solve the above technical problem, the utility model provides a vent valve for sewage treatment air compression pipeline, which comprises:

[0006] Valve body, the valve body side end is provided with air inlet and valve body throttling port, and the valve body bottom end is provided with air outlet;

[0007] Valve cover, which is arranged on the upper end of the valve body, is provided with valve cover throttling port and control port respectively on the valve cover;

[0008] U-shaped opening and closing element, which is arranged in the valve body and has its U-shaped opening facing the valve cover, is provided with sealing seat on the outer wall of the bottom end, and the sealing seat is provided with sealing element and sealingly contacts with the end face of the air outlet;

[0009] Compression spring, which is arranged between the end face of the control port and the inner wall of the bottom end of the U-shaped opening and closing element, provides the force for the sealing element to tightly contact with the end face of the air outlet;

[0010] Intermediate sleeve, which is axially movable and is sleeved on the outer wall of the U-shaped opening and closing element and is provided with sealing member between the U-shaped opening and closing element and the intermediate sleeve, forms middle cavity between the U-shaped opening and closing element, the intermediate sleeve and the valve cover;

[0011] A throttle valve is connected between the throttle port of the valve body and the throttle port of the valve cover.

[0012] An electromagnetic reversing valve has an inlet connected to the control port and an outlet connected to the atmosphere.

[0013] In an embodiment of the utility model, the sealing component includes an O-ring and a sliding ring, the O-ring and the sliding ring abut and are embedded in the outer peripheral wall of the U-shaped opening and closing member, the sliding ring is in sliding contact with the inner peripheral wall of the intermediate sleeve, and a guide ring is further arranged between the outer peripheral wall of the U-shaped opening and closing member and the inner peripheral wall of the intermediate sleeve.

[0014] In an embodiment of the utility model, the O-ring is made of rubber.

[0015] In an embodiment of the utility model, the outer diameter circle area of the sealing component in contact with the end face of the air outlet is smaller than the outer diameter circle area of the U-shaped opening and closing member.

[0016] In an embodiment of the utility model, the sealing component includes a rubber sealing ring.

[0017] In an embodiment of the utility model, a gap ring is arranged between the sealing seat and the end face of the air outlet.

[0018] In an embodiment of the utility model, the compression spring is tapered and shrinks away from the sealing seat.

[0019] In an embodiment of the utility model, the upper end of the intermediate sleeve extends radially outwardly 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.

[0020] In an embodiment of the utility model, the valve cover and the valve body are sealingly connected by screws.

[0021] In an embodiment of the utility model, the electromagnetic reversing valve is a two-position two-normal-open electromagnetic valve.

[0022] In an embodiment of the utility model, the throttle valve is a needle-shaped throttle valve.

[0023] The above technical solution of the utility model has the following advantages compared with the prior art:

[0024] The vent valve for the air compression pipeline of sewage treatment has simple structure and low cost, the throttle valve is added to the vent valve to control the closing speed, the impact on other associated air compressors when the air compressor is started and connected to the grid is greatly reduced, and the reliability of the air compressor operation is improved, the vent valve has high universality and can be applied to all air compression pipelines, and is especially suitable for use on a magnetic suspension compressor. Attached Figure Description

[0025] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the vent valve on the air-pressurized pipeline for sewage treatment according to this utility model.

[0027] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0028] Explanation of reference numerals in the instruction manual:

[0029] 1. Valve body; 11. Valve body throttle port; 2. Intermediate sleeve; 21. Mounting edge; 3. U-shaped opening and closing element; 31. Sealing seat; 32. Gap ring; 4. Compression spring; 5. Valve cover; 51. Control port; 52. Valve cover throttle port; 6. Screw; 7. Seal; 8. Sealing component; 81. Sliding ring; 82. O-ring; 9. Guide ring; 10. Solenoid directional valve; 15. Throttling valve; 16. Middle cavity; A. Air inlet; B. Air outlet; C. Atmosphere. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0031] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0032] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0033] In the utility model, unless otherwise explicitly limited, the words such as ''set'', ''install'', ''connect'' should be understood in a broad sense, for example, can be directly connected, also can be indirectly connected through intermediate medium, can be fixedly connected, also can be detachably connected, can be integrally formed, can be mechanically connected, also can be electrically connected or can communicate with each other, can be the intercommunication of two elements or the interaction relationship of two elements. The person 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 vent valve for sewage treatment air compression pipeline, which comprises:

[0035] Valve body 1, the valve body 1 side end is provided with air inlet A and valve body throttle 11, the valve body 1 bottom end is provided with air outlet B;

[0036] Valve cover 5, setting on the valve body 1 upper end, the valve cover 5 is respectively provided with valve cover throttle 52 and control port 51;

[0037] U-shaped opening and closing part 3, setting in the valve body 1 and its U-shaped opening is towards the valve cover 5, the bottom end outer wall of the U-shaped opening and closing part 3 is outwardly extended and is provided with sealing seat 31, the sealing seat 31 is provided with sealing element 7 and is sealed with the end surface of air outlet B;

[0038] Compression spring 4, setting between the control port 51 end surface and the bottom end inner wall of the U-shaped opening and closing part 3, to provide the force that the sealing element 7 is tightly attached to the end surface of air outlet B;

[0039] Intermediate sleeve 2, can be axially movable and is sleeved on the U-shaped opening and closing part 3 outside and is provided with sealing part 8 between the U-shaped opening and closing part 3, the intermediate sleeve 2 and the valve cover 5 form the middle cavity 16;

[0040] Throttle valve 15, is connected between the valve body throttle 11 and the valve cover throttle 52;

[0041] Electromagnetic reversing valve 10, the inlet of the electromagnetic reversing valve 10 accesses the control port 51, and the outlet of the electromagnetic reversing valve 10 accesses atmosphere C.

[0042] By increasing a throttle valve 15 on the vent valve, the closing speed is controlled, the impact on other associated fan when the fan is started and connected to the network is greatly reduced, the reliability of fan operation is improved, the universality is strong, can be applicable to all air compression pipelines, especially suitable for use on magnetic suspension compressor.

[0043] Referring to Figure 2As shown, the sealing component 8 includes an O-ring 82 and a sliding ring 81, the O-ring 82 and the sliding ring 81 abut and are embedded in the outer peripheral wall of the U-shaped opening and closing member 3, the sliding ring 81 is in sliding contact with the inner peripheral wall of the intermediate sleeve 2, and a guide ring 9 is further arranged between the outer peripheral wall of the U-shaped opening and closing member 3 and the inner peripheral wall of the intermediate sleeve 2. The sliding ring 81 and the O-ring 82 are adopted, so that the intermediate sleeve 2 can ensure less wear and air leakage during smooth sliding relative to the U-shaped opening and closing member 3; the O-ring 82 is selected from a high-temperature-resistant rubber material, thereby prolonging the service life.

[0044] In one embodiment, the outer diameter circle area in contact between the sealing member 7 and the end surface of the air outlet B is smaller than the outer diameter circle area of the U-shaped opening and closing member 3. Optionally, the sealing member 7 includes a rubber sealing ring.

[0045] In one embodiment, the sealing seat 31 is provided with a gap ring 32 between the end surface of the air outlet B.

[0046] In one embodiment, the compression spring 4 is conical and shrinks away from the sealing seat 31.

[0047] In one embodiment, the upper end of the intermediate sleeve 2 extends radially outwardly with a mounting edge 21, and the inner wall of the upper end of the valve body 1 is provided with a support step for supporting the mounting edge 21.

[0048] In one embodiment, the valve cover 5 and the valve body 1 are sealingly connected through the screw 6.

[0049] In one embodiment, the electromagnetic reversing valve 10 is a two-position two-normal-open electromagnetic valve; and the throttle valve 15 is a needle-shaped throttle valve.

[0050] The opening and closing principle of the utility model is as follows:

[0051] (1) When the compressor (blower) is shut down, the electromagnetic reversing valve 10 is powered off, the middle cavity 16 is connected with the atmosphere C, the middle cavity 16 is depressurized, and the air amount entering the middle cavity 16 through the throttle valve 15 is less than the air amount discharged from the middle cavity 16 to the atmosphere C through the electromagnetic reversing valve 10, so the pressure of the middle cavity 16 approaches the atmospheric pressure of the atmosphere C.

[0052] Under the action of the pressure P at the air inlet A, the U-shaped opening and closing member receives an upward force:

[0053]

[0054] Wherein, DF is the sealing diameter of the sealing member 7; similarly, the U-shaped opening and closing member 3 is subjected to the pressure F1 of the compression spring 4; assuming that the sum of the gravity of the compression spring 4 and the U-shaped opening and closing member 3 is W, and the friction force f between the sliding ring 81 (and the guide ring 9) and the intermediate sleeve 2, when F>F1+W+f, the U-shaped opening and closing member 3 moves upward, the air inlet A is connected with the air outlet B, the pressure at the air inlet A is rapidly released, thereby avoiding the damage of the excessive counter pressure to the compressor when the compressor is turned off. With the decrease of the pressure at the air inlet A, F rapidly decreases, when F<F1+W+f, the U-shaped opening and closing member 3 moves downward, the sealing member 7 is tightly closed to the end surface at the air outlet B, the residual pressure at the air inlet A enters the middle cavity 16 through the throttle valve 15 and is discharged into the atmosphere C through the control port 51.

[0055] (2) The compressor (blower) is turned on, the electromagnetic reversing valve 10 is powered off and opened, when the rotating speed of the compressor is very low (i.e. the pressure at the air inlet A is very small), the air with very small pressure at the air inlet A enters the middle cavity 16 through the throttle valve 15 and is finally discharged into the atmosphere C through the electromagnetic reversing valve 10; when the rotating speed of the compressor reaches a certain degree so that F>F1+W+f, the U-shaped opening and closing member 3 moves upward, the pressure air at the air inlet A is rapidly discharged into the atmosphere C through the air outlet B.

[0056] When the rotating speed of the compressor continuously increases, the air outlet B is continuously opened to discharge air; when the compressor reaches the rated working rotating speed, the electromagnetic reversing valve 10 is powered on and closed, the pressure air at the air inlet A is discharged into the atmosphere C through the air outlet B, and a very small part of the pressure air at the air inlet A enters the middle cavity 16 through the throttle valve 15, since the middle cavity 16 is a sealed cavity at this time, the pressure P1 of the middle cavity 16 slowly increases, when , the U-shaped opening and closing member 3 moves downward, the moving speed of the U-shaped opening and closing member 3 is determined by the throttling area of the throttle valve 15, since the throttling area of the throttle valve 15 is very small, the closing speed of the U-shaped opening and closing member 3 is small, until the sealing member 7 tightly closes to the end surface at the air outlet B and reaches the sealing specific pressure, the air outlet B is completely closed, thereby realizing the function of slowly closing, thereby avoiding the impact damage of the existing technology when the blower is turned on and connected to the grid (the connection to the grid is completed before the closing).

[0057] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present application and not to limit, although the present application is described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A vent valve for use on a sewage treatment air line, characterised in that, The utility model relates to a valve body (1) is provided with air inlet (A) and valve body throttle (11) on the side end, and is provided with air outlet (B) on the bottom end, and the valve cover (5) is arranged on the upper end of valve body (1), and is provided with valve cover throttle (52) and control port (51) respectively on the upper end of valve cover (5), and the U-shaped opening of U-shaped opening and closing part (3) is towards valve cover (5), and the outer wall of the bottom end of U-shaped opening and closing part (3) extends outward and is provided with sealing seat (31), and sealing element (7) is arranged on sealing seat (31) and is in sealing contact with the end face of air outlet (B), and compression spring (4) is arranged between the end face of control port (51) and the inner wall of the bottom end of U-shaped opening and closing part (3) to provide the force that sealing element (7) is tightly attached to the end face of air outlet (B), and intermediate sleeve (2) can be axially movable and is sleeved on the outer wall of U-shaped opening and closing part (3) and is provided with sealing part (8) between the outer wall of U-shaped opening and closing part (3) and the inner wall of intermediate sleeve (2), and the middle cavity (16) is formed between U-shaped opening and closing part (3), intermediate sleeve (2) and valve cover (5), and throttle valve (15) is connected between valve body throttle (11) and valve cover throttle (52), and electromagnetic reversing valve (10) is connected to control port (51), and the outlet of electromagnetic reversing valve (10) is connected to atmosphere (C). The sealing part (8) includes an O-ring (82) and a sliding ring (81), the O-ring (82) and the sliding ring (81) are in abutment and are embedded in the outer peripheral wall of the U-shaped opening and closing part (3), the sliding ring (81) is in sliding contact with the inner peripheral wall of the intermediate sleeve (2), and a guide ring (9) is further arranged between the outer peripheral wall of the U-shaped opening and closing part (3) and the inner peripheral wall of the intermediate sleeve (2). The outer diameter circle area of the contact between the sealing element (7) and the end face of the air outlet (B) is smaller than the outer diameter circle area of the U-shaped opening and closing part (3). The sealing element (7) includes a rubber sealing ring. The sealing seat (31) is provided with a gap ring (32) between the end face of the air outlet (B). The compression spring (4) is tapered and shrinks away from the sealing seat (31). The upper end of the intermediate sleeve (2) extends radially outward to have a mounting edge (21), and the inner wall of the upper end of the valve body (1) is provided with a support step for supporting the mounting edge (21). The valve cover (5) and the valve body (1) are sealingly connected by a screw (6).

2. A vent valve for use on a sewage treatment air line according to claim 1, characterised in that, The electromagnetic reversing valve (10) is a two-position two-normal-open electromagnetic valve.

3. A vent valve for use on a sewage treatment air line according to claim 1, wherein, The throttle valve (15) adopts a needle-shaped throttle valve.

4. A vent valve for use on a sewage treatment air line according to claim 3, wherein, ​ 5. The vent valve for use in a sewage treatment air line according to claim 1, characterized in that ​ 6. A vent valve for use on a sewage treatment air line according to claim 1, wherein, ​ 7. The vent valve for use in a sewage treatment air line according to claim 1, characterized in that ​ 8. The vent valve for use in a sewage treatment air line according to claim 1, characterized in that ​ 9. A vent valve for use on a sewage treatment air line according to claim 1, wherein, ​ 10. The vent valve for use in a sewage treatment air line according to claim 1, characterized in that ​

Images