Gas-dissolved water release valve

Abstract

The utility model provides a dissolved air water release valve which comprises a valve body, a valve rod, a valve sealing plate, an upper release plate and a lower release plate, the valve body is in a cylindrical shape with two open ends, and the valve rod is inserted into the valve sealing plate and can move in the valve body in the axis direction; the upper release plate is arranged in the valve body and located between the water inlet and the water outlet, a through hole is formed in the upper release plate, and the valve rod penetrates through the through hole and then is connected with the lower release plate. A releaser installed in the air floater is replaced by the dissolved air water release valve installed outside the air floater, installation and maintenance are convenient, and the release valve is simple in structure, stable in operation and not prone to faults. In addition, according to the release valve, the distance between the release upper plate and the release lower plate is adjusted by moving the valve rod up and down, and therefore the release effect of the air-dissolved water is adjusted. And meanwhile, the conical step part on the valve rod can enter the through hole of the release upper plate by moving the valve rod up and down, so that blockages are scattered and discharged, and the effects of preventing blockage and cleaning are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, especially a kind of dissolved air water release valve. BACKGROUND

[0002] At present, sewage is mostly treated by air flotation method, which includes cloth air flotation method, pressurized dissolved air flotation method and electrolytic air flotation method. The pressurized dissolved air flotation method is the most widely used air flotation method, which usually uses dissolved air release device installed in the air flotation to introduce a large number of micro-bubbles released from the pressurized dissolved air water into the water to be treated, and uses the floatation force of the bubbles adhered to the solid impurities to achieve rapid separation of solid and liquid. After the pressure dissolved air water is depressurized and energy is dissipated by the dissolved air release device, a large number of micro-bubbles are released, which carry the impurities in the water to the water surface for separation by floating. The more the bubbles, the smaller the size and the more reasonable the distribution, the better the separation effect of impurities and water.

[0003] However, the current dissolved air release device has the following defects: (1) the structure of the dissolved air release device is complex, and it is difficult to install and maintain; (2) the release of dissolved air water by the dissolved air release device cannot be adjusted, which affects the depressurization effect; (3) some impurity particles inevitably exist in the dissolved air water, and the release device is prone to blockage after a period of use, which destroys the continuity of the sewage treatment process. CONTENT OF THE INVENTION

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a dissolved air water release valve to solve the problems of difficult installation and maintenance, poor depressurization effect and easy blockage of the dissolved air release device in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present utility model provides a dissolved air water release valve, which comprises a valve body, a valve stem, a valve sealing plate, a release upper plate and a release lower plate. The valve body is in the shape of a cylinder with both ends open. The valve sealing plate is arranged at the upper end of the valve body. The valve stem is inserted into the valve sealing plate and can move along the axis direction in the valve body. A water inlet is formed on one side of the valve body, and the lower end opening of the valve body is a water outlet. The release upper plate is arranged in the valve body between the water inlet and the water outlet. The release upper plate is provided with a through hole. The valve stem passes through the through hole and is connected with the release lower plate.

[0006] In an embodiment of the present utility model, the upper part of the through hole is a tapered hole, and the inner diameter of the tapered hole gradually decreases from top to bottom. The stem of the valve stem is provided with a tapered step portion, and the diameter of the tapered step portion gradually decreases from top to bottom.

[0007] In an embodiment of the present utility model, the valve stem comprises several segments in the shape of steps, and each segment is provided with a tapered step portion at the joint.

[0008] In an embodiment of the present application, the diameter of the release lower plate is smaller than the inner diameter of the valve body.

[0009] In an embodiment of the present application, the top surface of the release lower plate is provided with a third sealing member in the form of a ring, and the inner diameter of the third sealing member is greater than the diameter of the bottom of the through hole.

[0010] In an embodiment of the present application, the valve body further comprises a valve rod fixing plate between the water inlet and the valve sealing plate, and the valve rod fixing plate is provided with a through guide hole, and the valve rod can move up and down in the guide hole along the axial direction.

[0011] In an embodiment of the present application, the valve rod is provided with a second sealing member on the path in contact with the guide hole.

[0012] In an embodiment of the present application, the valve sealing plate is provided with a threaded hole, the upper part of the valve rod is provided with a corresponding external thread, the valve rod is screwed into the threaded hole of the valve sealing plate, and the top end of the valve rod is provided with a hand wheel.

[0013] In an embodiment of the present application, the threaded hole is provided with a first sealing member matched with the valve rod.

[0014] As described above, the dissolved air water release valve of the present application has the following beneficial effects: the dissolved air water release valve installed outside the air float is used to replace the releaser installed inside the air float, which is convenient for installation and maintenance, and the release valve of the present application has simple structure and stable operation, and is not prone to failure; the release valve can adjust the distance between the release upper plate and the release lower plate by moving the valve rod up and down, so as to adjust the release effect of the dissolved air water, and make the dissolved air efficiency more efficient; at the same time, moving the valve rod up and down can also make the conical step part on the valve rod enter the through hole of the release upper plate, scatter and discharge the blockage, and play the roles of anti-blocking and cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure of the dissolved air water release valve disclosed in the embodiment of the present application is shown Figure 1 .

[0016] Figure 2 The structure of the dissolved air water release valve disclosed in the embodiment of the present application is shown Figure 2 .

[0017] Element number explanation

[0018] 1, valve body; 11, water inlet; 12, water outlet; 2, valve stem; 21, hand wheel; 22, conical step; 23, second sealing element; 3, valve cover plate; 31, threaded hole; 32, first sealing element; 4, valve gland; 5, valve stem fixing plate; 6, release upper plate; 61, conical hole; 7, release lower plate; 71, third sealing element. DETAILED DESCRIPTION

[0019] The implementation of the present application will be described by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] Please refer to Figures 1-2 The present application provides a kind of dissolved air water release valve, including valve body 1, valve stem 2, valve cover plate 3, release upper plate 6 and release lower plate 7, the valve body 1 is the cylindrical of two ends opening, the valve cover plate 3 is arranged in the upper end of valve body 1, the valve stem 2 is inserted in the valve cover plate 3, and can move in the axial direction in valve body 1;The side of the valve body 1 is provided with water inlet 11, and the lower end opening of the valve body 1 is water outlet 12, the release upper plate 6 is arranged in the valve body 1, and is located between water inlet 11 and water outlet 12, the release upper plate 6 is used to separate water inlet 11 and water outlet 12, the release upper plate 6 is provided with through hole that can be communicated with the inlet and outlet, the valve stem 2 passes through the through hole and is fixedly connected with release lower plate 7.

[0021] Dissolved air water under pressure enters valve body 1 from water inlet 11, passes through the narrow gap between through hole and valve stem 2, vertically collides release lower plate 7, and collides and dissipates energy between release upper plate 6 and release lower plate 7, so as to precipitate a large number of dense small bubbles;And when the pressure reduction effect is not good, the distance between release upper plate 6 and release lower plate 7 can be adjusted by moving the valve stem 2 up and down, so as to adjust the release effect of dissolved air water.

[0022] Further, the diameter of the release lower plate 7 is less than the inner diameter of the valve body 1, facilitating the movement of the release lower plate 7 in the valve body 1 and not hindering the discharge of dissolved air water.

[0023] To realize that the valve stem 2 can move up and down in the axial direction in the valve body 1, the valve cover plate 3 is provided with a threaded hole 31, the upper part of the valve stem 2 is provided with a corresponding external thread, the valve stem 2 is screwed into the threaded hole 31 of the valve cover plate 3, and the top end of the valve stem 2 is provided with a hand wheel 21, so as to realize the up and down movement of the valve stem 2 by rotating the hand wheel 21.

[0024] Further, the first sealing element 32 cooperating with the valve stem 2 is arranged in the threaded hole 31.

[0025] Further, the valve sealing plate 3 is further provided with a valve gland 4 for reinforcing the connection between the valve sealing plate 3 and the valve body 1.

[0026] In an embodiment of the utility model, the upper part of the through hole is a tapered hole 61, the inner diameter of the tapered hole 61 gradually reduces from top to bottom, the stem of the valve rod 2 is provided with a tapered step portion 22, and the diameter of the tapered step portion 22 gradually reduces from top to bottom. When the release valve is blocked, the valve rod 2 can be moved up and down, so that the tapered step portion 22 on the valve rod 2 can enter the tapered hole 61 of the release upper plate 6, the blockage is broken and discharged from the through hole, and the cleaning effect can be achieved by reciprocating several times.

[0027] Further, the valve rod 2 comprises a plurality of stepped segments, and each segment is provided with a tapered step portion 22 at the joint.

[0028] In an embodiment of the utility model, the top surface of the release lower plate 7 is provided with a third sealing member 71 in the form of a ring, and the inner diameter of the third sealing member 71 is greater than the diameter of the bottom of the through hole. Since the valve rod 2 can be moved up and down, the valve rod 2 can be moved up to be in close contact with the release lower plate 7 and the release upper plate 6, so that the third sealing member 71 can seal the through hole, thereby realizing the closing of the dissolved air water release valve.

[0029] In an embodiment of the utility model, the valve body 1 is further provided with a valve rod 2 fixing plate between the water inlet 11 and the valve sealing plate 3, the valve rod 2 fixing plate is provided with a through guide hole, and the valve rod 2 can move up and down in the guide hole along the axial direction.

[0030] Further, the valve rod 2 is provided with a second sealing member 23 on the path in contact with the guide hole.

[0031] The valve rod 2 fixing plate and the guide hole not only can guide the up and down movement of the valve rod 2 and prevent the valve rod 2 from being skewed, but also can form a double sealing with the second sealing member 23 outside the valve rod 2 and the first sealing member 32 between the valve sealing plate 3 and the valve rod 2, so that the dissolved air water cannot leak from the upper end of the valve body 1.

[0032] Principle description: when used, the dissolved air water under pressure flows into the inner cavity of the valve body from the water inlet, passes through the through hole of the release upper plate, vertically collides against the release lower plate, collides and dissipates energy between the release upper plate and the release lower plate, so that a large number of dense small bubbles are released, flow out of the water outlet, and enter the air float inside. When the release valve has a poor pressure reduction effect, the hand wheel can be rotated to drive the valve rod to move up and down, so as to adjust the gap between the release upper plate and the release lower plate, thereby adjusting the release effect of the dissolved air water. When the release valve is blocked, the hand wheel is rotated, so that the tapered step portion on the valve rod enters the tapered hole of the release upper plate, and the cleaning effect can be achieved by reciprocating several times.

[0033] In summary, the utility model discloses a dissolved air water release valve installed outside the air float to replace the release device installed inside the air float, which is convenient to install and maintain, and the release valve is simple in structure, stable in operation and difficult to malfunction; the utility model can adjust the spacing between the release upper plate and the release lower plate by moving the valve stem up and down, thereby adjusting the release effect of the dissolved air water and making the dissolved air efficiency more efficient; at the same time, moving the valve stem up and down can also make the conical step part on the valve stem enter the through hole of the release upper plate, scatter and discharge the blockage, and play the anti-blocking and cleaning roles. Therefore, the utility model effectively overcomes the various shortcomings in the prior art and has high industrial utilization value.

[0034] In the specification, the terms such as "upper", "lower", "left", "right", "front", "rear", "middle" and "one" are only for the convenience of clear description, and are not used to limit the scope of the utility model, and the change or adjustment of the relative relationship is also considered as the scope of the utility model without substantial change of the technical content.

[0035] The above embodiments only exemplarily illustrate the principle and effect of the utility model, and are not used to limit the utility model. All equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A dissolved air water release valve characterized by, The valve body is a cylinder with two open ends, the valve sealing plate is arranged at the upper end of the valve body, the valve rod is inserted into the valve sealing plate and can move along the axial direction in the valve body, a water inlet is arranged on one side of the valve body, the lower end opening of the valve body is a water outlet, the release upper plate is arranged in the valve body and between the water inlet and the water outlet, the release upper plate is provided with a through hole, and the valve rod passes through the through hole and is connected with the release lower plate.

2. The gas dissolution water release valve according to claim 1, wherein The upper part of the through hole is a tapered hole, the inner diameter of the tapered hole gradually decreases from top to bottom, the rod part of the valve rod is provided with a tapered step part, and the diameter of the tapered step part gradually decreases from top to bottom.

3. The gas dissolution water release valve according to claim 2, wherein The valve rod comprises a plurality of stepped sections, and a tapered step part is arranged at the joint of each section.

4. The gas dissolution water release valve according to claim 1, wherein The diameter of the release lower plate is smaller than the inner diameter of the valve body.

5. The gas dissolution water release valve according to claim 1, wherein The top surface of the release lower plate is provided with a third sealing ring in the form of a ring, and the inner diameter of the third sealing ring is greater than the diameter of the bottom of the through hole.

6. The gas dissolution water release valve according to any one of claims 1 to 5, wherein The valve body is further provided with a valve rod fixing plate, the valve rod fixing plate is located between the water inlet and the valve sealing plate, a guide hole is arranged on the valve rod fixing plate, the valve rod can move up and down in the guide hole along the axial direction, and the valve rod is provided with a second sealing ring.

7. The gas dissolution water release valve according to claim 6, wherein The valve rod is provided with a second sealing ring on the path in contact with the guide hole.

8. The gas dissolution water release valve according to claim 1, wherein A threaded hole is arranged on the valve sealing plate, the upper part of the valve rod is provided with a corresponding external thread, the valve rod is screwed into the threaded hole of the valve sealing plate, the top end of the valve rod is provided with a hand wheel, and a first sealing ring is arranged in the threaded hole and matched with the valve rod.

9. The gas dissolution water release valve according to claim 8, wherein A first sealing ring is arranged in the threaded hole and matched with the valve rod.

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