High-pressure cylinder type air valve

Abstract

The utility model provides a high pressure cylinder type air valve which comprises a valve body, a valve cover, a protective cylinder and a floating body located in the protective cylinder, the floating body comprises a lower floating body and an upper floating body which are arranged from bottom to top, the upper portion of the lower floating body is provided with a sealing seat, and the lower portion of the upper floating body is provided with an exhaust nozzle communicated with an exhaust channel of the valve cover; the sealing seat at the upper part of the lower floating body can seal the exhaust nozzle at the lower part of the upper floating body; an exhaust window is formed in the top end of the pile casing, and a hole is formed in the bottom of the pile casing; the trace exhaust structure is integrated in the high-speed intake and exhaust structure, the structure is compact, and functions are complete. And two sections of floating bodies are adopted, so that leakage points are reduced, and the sealing performance of the air valve is improved. And a floating ball structure is not adopted. The outer circumferential face of the upper floating body is provided with guide ribs arranged in the circumferential direction of the upper floating body, and a groove is formed between every two guide ribs. The gap between the upper floating body and the pile casing is increased under the condition that the guiding function is guaranteed, and the blowing blocking phenomenon can be prevented during high-speed exhaust.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field more specifically, relate to a high pressure cylinder type air valve. BACKGROUND

[0002] In the pipeline conveying system, the pump conveying water flow passes through each place of the pipeline, when the water flow reaches a high place, air will gather, form a high pressure point and reduce the flow, at this high point, when the flowing water approaches the peak, water can stay on both sides of the peak, the air trapped between the stagnant water and the water flow is compressed. When the pump fails unexpectedly, the pump is closed, causing the water flow nearby to stop flowing, the pressure drops instantaneously, forming a vacuum, which may even cause the pipeline to collapse in the worst case, therefore, an air valve is installed at the high point of the pipeline, which is the breather of the pipeline and the safety guarantee device of the pipeline. When the pressure in the pipeline is lower than atmospheric pressure, air is sucked in, and when the pressure in the pipeline rises above atmospheric pressure, air is discharged, during the air discharge process, the valve can automatically close when the liquid in the pipeline fills the pipeline, and liquid is not allowed to leak into the atmosphere.

[0003] The high pressure air valve is one kind of air valve, compared with ordinary air valves, it has higher pressure rating, structural strength and sealing performance. The existing technology also often uses an integrated composite air valve containing a float to provide buoyancy, because the float has low pressure strength and has its own weld, the valve cannot withstand high medium pressure, and is not suitable for high pressure working conditions. When the high pressure air valve is in high speed exhaust, a large amount of gas passes through the exhaust valve, the gas passes through the ball barrel, because the space between the float ball and the ball barrel is limited, a large amount of gas is rapidly generated in the ball barrel, which can take the float ball and block the exhaust port, stop the exhaust, and cause the blowout phenomenon. For example, the patent application for invention with application number 201010545700.0 and the name of new pneumatic type high speed exhaust / air valve is a composite air valve provided with a float ball. For another example, the utility model patent with application number 201520436416.8 and the name of a kind of anti-spray water type high speed exhaust valve has the functions of anti-erosion and anti-spray water, but still has the above-mentioned problems. The applicant has applied for a patent related to a high pressure air valve, the utility model patent with application number 202022111969.X and the name of a kind of cylinder type high pressure air valve, the float body of the patent does not use a float ball, and the float body is divided into three parts, which results in many leakage points and poor sealing performance. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problems of the existing high pressure air valve, poor sealing performance, limited space between the float ball and the ball barrel, blowout phenomenon during high speed exhaust, low strength of the float ball, and the existence of welds, which makes it unsuitable for high pressure working conditions, and provides a high pressure cylinder type air valve.

[0005] The high-pressure cylinder type air valve comprises a valve body, a valve cover, a cylinder and a float in the cylinder, the valve body is open at both ends, one end is communicated with a pipeline as an inlet, the other end is provided with the valve cover as an outlet, the valve cover is provided with an exhaust passage, the cylinder is installed in the valve body and fixedly connected with the valve body at the outlet, the float is located in the cylinder, the float comprises a lower float and an upper float arranged from bottom to top, the upper part of the lower float is provided with a sealing seat, the lower part of the upper float is provided with an exhaust nozzle communicated with the exhaust passage of the valve cover, the sealing seat of the upper part of the lower float can seal the exhaust nozzle of the lower part of the upper float, the top of the cylinder is provided with an exhaust window, the bottom of the cylinder is provided with a hole, one end of the upper float towards the valve cover is in contact with the valve cover, and the upper float does not block the window of the cylinder when the lower float and the upper float are located at the lowest position.

[0006] The high-pressure cylinder type air valve has the advantages that the float is designed as two parts, i.e., an upper float and a lower float, compared with the three-section float in the prior art, the number of leakage points is reduced, and the sealing performance of the air valve is improved.

[0007] The exhaust nozzle is a device for discharging gas in a pipeline.

[0008] Further, the bottom surface of the upper float and the top surface of the lower float are both planes.

[0009] Further, the outer circumferential surface of the upper float is provided with guide ribs arranged in the circumferential direction of the upper float, and grooves are formed between the guide ribs. In the prior art, the space between the float ball and the cylinder is limited, and blowout is prone to occur during high-speed exhaust, the guide ribs are arranged on the upper float, grooves are formed between the guide ribs, the upper float can be guided to move, and the structure increases the gap between the upper float and the cylinder, thereby preventing blowout.

[0010] Further, the upper floating body adopts ultra-high molecular weight polyethylene material. The upper floating body has strong structural strength, smooth sealing surface and never rusts by using the material, forms sealing with the valve cover, and does not have sticking phenomenon due to long time sealing, so that the sealing can be instantaneously separated in time and reliably when negative pressure occurs, and is suitable for high pressure working condition.

[0011] Further, the lower floating body is a hollow structure, and has upward floating force.

[0012] Further, the lower floating body is a hollow structure, and has upward floating force.

[0013] Further, the lower floating body is a hollow structure, and has upward floating force.

[0014] Further, the lower floating body is a hollow structure, and has upward floating force.

[0015] Further, the lower floating body is a hollow structure, and has upward floating force.

[0016] Further, the lower floating body is a hollow structure, and has upward floating force.

[0017] Further, the lower floating body is a hollow structure, and has upward floating force.

[0018] The utility model has the following beneficial effects:

[0019] This utility model discloses a high-pressure cylindrical air valve, employing a two-section float, which, compared to the existing three-section float technology, results in a more compact structure, reduces leakage points, and improves the sealing performance of the air valve. During high-speed exhaust, air enters through the valve body inlet, then passes through the annular channel between the valve body and the protective cylinder, through the window on the protective cylinder, and exits through the exhaust channel on the valve cover. During micro-exhaust, air enters the protective cylinder, passes through the exhaust nozzle, and exits through the exhaust channel on the valve cover. This utility model integrates the micro-exhaust structure into the high-speed intake and exhaust structure, resulting in a compact structure and complete functionality. The outer circumference of the upper float has guide ribs arranged circumferentially along the upper float, with grooves formed between each pair of guide ribs. The design of guide ribs and the groove in the middle of the upper float's cylindrical outer circumference increases the gap between the upper float and the protective cylinder while ensuring the guiding function, preventing blockage during high-speed exhaust. The lower float is not a float ball; compared to a float ball structure, it has no welds, resulting in higher structural strength and suitability for high-pressure conditions. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of a high-pressure cylindrical air valve (in a large exhaust and intake state);

[0022] Figure 2 This is a schematic diagram of the structure of a high-pressure cylindrical air valve (in a sealed state);

[0023] Figure 3 This is a schematic diagram of the structure of a high-pressure cylindrical air valve (in a state of slight exhaust).

[0024] Figure 4 This is a cross-sectional view of the floating body;

[0025] Figure 5 This is a top view of the floating body.

[0026] The serial numbers are: 1-valve body, 2-protective sleeve, 3-lower float, 3a-body, 3b-sealing block, 4-sealing seat, 5-exhaust nozzle, 6-nut, 7-upper float, 7a-protrusion, 7b-guide rib, 8-valve cover, 9-protective net, 10-protective cover, 11-O-ring seal, 12-window, 13-exhaust passage. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0028] Example 1

[0029] As Figure 1 shown, a high-pressure cylinder air valve comprises a valve body 1, a valve cover 8, a cylinder 2 and a float in the cylinder 2. The embodiment improves the structure of the cylinder 2 and the float, so that the air valve has good sealing performance and its structural strength can be applied to high-pressure working conditions.

[0030] Valve body 1: the valve body 1 has an open structure at both ends, one end is connected with a pipeline through an inlet, and the other end is provided with a valve cover 8. The gas and water in the pipeline enter the valve body 1 through the inlet of the valve body 1.

[0031] Valve cover 8: the valve cover 8 is provided with an exhaust passage 13. The valve cover 8 is connected with the outside, and a protective cover 10 is installed on the valve cover 8. A protective net 9 is installed between the protective cover 10 and the valve cover 8 to prevent foreign matters from entering the valve body 1 and affecting the sealing.

[0032] Cylinder 2: the cylinder 2 is installed in the valve body 1 and is fixedly connected with the valve body 1 at the outlet through being pressed by the valve cover 8. As Figure 1 shown, the cylinder 2 has a hollow structure with a hemispherical bottom and a cylindrical body.

[0033] Float: the float is located in the cylinder 2; the float comprises a lower float 3 and an upper float 7 arranged from bottom to top, and the lower float 3 and the upper float 7 have gaps with the cylinder 2, as Figure 1 shown, the lower float 3 also has a hollow structure with a hemispherical bottom and a cylindrical body. The lower float 3 comprises a body 3a and a sealing block 3b. The body 3a has a hollow structure with a hemispherical bottom and a cylindrical body. The sealing block 3b blocks the opening of the body 3a. A sealing seat 4 is installed on the sealing block 3a. Such structure facilitates the processing of the hollow structure of the lower float 3.

[0034] The bottom surface of the upper float 7 and the top surface of the lower float 3 are both flat. The top surface of the upper float 7 faces the valve cover 8 and has a protrusion 7a which can extend into the exhaust passage 13 of the valve cover 8. A part of the upper float 7 is cylindrical, and a part is the protrusion 7a. The outer diameter of the protrusion 7a is smaller than that of the cylindrical part. A sealing ring is arranged between the cylindrical upper surface and the valve cover 8 to make the upper float 7 contact and seal with the valve cover 8.

[0035] A sealing seat 4 is installed on the upper part of the lower float 3, and an exhaust nozzle 5 communicating with the exhaust channel 13 of the valve cover 8 is installed on the lower part of the upper float 7. The sealing seat 4 on the upper part of the lower float 3 can seal the exhaust nozzle 5 on the lower part of the upper float 7. When the sealing seat 4 of the lower float 3 squeezes and seals the exhaust nozzle 5 of the upper float 7, the O-ring seal 11 on the top surface of the upper float 7 contacts and seals with the valve cover 8. At this time, the valve body 1 is closed, and air cannot enter or leave the valve body 1. To ensure sealing, O-ring seals 11 are provided between the valve body 1 and the valve cover 8, and between the upper float 7 and the valve cover 8.

[0036] The top of the protective sleeve 2 has an exhaust window 12, and the bottom of the protective sleeve 2 has a hole. When the lower float 3 and the upper float 7 are in their lowest positions, the upper float 7 does not block the window 12 on the protective sleeve 2. This ensures that during high-speed exhaust, air can enter the exhaust channel 13 of the valve cover 8 from the window 12.

[0037] The upper float 7 has a mounting hole for the exhaust nozzle 5, and the upper end of the exhaust nozzle 5 has a thread that engages with the thread of the mounting hole; the upper end of the exhaust nozzle 5 is also provided with a nut 6 to be tightened with the end of the exhaust nozzle 5.

[0038] This embodiment employs a two-section float, which, compared to the existing three-section float, results in a more compact structure, reduces leakage points, and improves the sealing performance of the air valve. During high-speed exhaust, air enters through the inlet of valve body 1, then passes through the annular channel between valve body 1 and casing 2, through the window 12 on casing 2, and exits through the exhaust channel 13 of valve cover 8. During micro-exhaust, air enters casing 2, passes through exhaust nozzle 5, and exits through the exhaust channel 13 of valve cover 8. This embodiment integrates the micro-exhaust structure within the high-speed intake and exhaust structure, resulting in a compact structure and complete functionality.

[0039] Example 2

[0040] The difference between Example 2 and Example 1 is that, as Figure 4 and Figure 5 As shown, the outer circumference of the upper float 7 has guide ribs 7b arranged circumferentially along the upper float 7, and grooves are formed between each pair of guide ribs 7b. Because of the design of guide ribs 7b on the outer circumference of the upper float 7 and the structure of the groove in the middle, the gap between the upper float 7 and the protective sleeve 2 is increased while ensuring the guiding function, which can prevent the blow-blocking phenomenon during high-speed exhaust.

[0041] Example 3

[0042] The embodiment 3 is different from the embodiment 2 in that the cross-sectional flow area between the valve body 1 and the spool 2, the flow area of the window 12 on the spool 2 and the cross-sectional flow area of the valve cover exhaust passage 13 are not less than the cross-sectional flow area of the valve body 1 inlet. The cross-sectional flow area of any one of the gas flow passages in this embodiment is not less than the flow area of the nominal diameter of the valve, which is a full-bore design, ensuring the excellent inlet and exhaust functions of the valve. The cross-sectional flow area of the valve body 1 inlet is the flow area of the nominal diameter of the valve.

[0043] The working process is as follows:

[0044] 1. Initial state of the valve (see Figure 1 ): The lower float 3 of the high-pressure cylinder air valve is located at the bottom of the spool 2, and the lower float 3 has a cavity in the middle, which has an upward buoyancy. The sealing seat 4 at the upper part of the lower float 3 is in contact with the sealing surface of the exhaust nozzle 5 of the upper float 7, and the exhaust nozzle 5 is fixed and supported on the upper float 7 by a nut. The lower float 3 and the upper float 7 can move up and down in the spool 2 without obstruction under the action of vertical force, with a travel limit. The annular cross section between the inner cavity of the valve body 1 and the spool 2, the uniformly arranged windows 12 on the spool 2 and the exhaust passage 13 in the middle of the valve cover 8 are in a maximum flow area state.

[0045] 2. High-speed exhaust state (see Figure 1 ): When the pipeline is filled with water for exhaust, high-speed gas flow enters the valve body 1 through the inlet at the lower part of the valve body 1, and most of the gas flow enters the upper part of the valve body 1 through the annular space between the valve body 1 and the spool 2, and then is discharged into the atmosphere through the windows 12 of the spool 2 and the exhaust passage 13 of the valve cover 8. A small part of the gas flow enters the spool 2 through the hole at the bottom of the spool 2, and moves upward along the gap between the lower float 3 and the upper float 7 and the spool 2. Because the upper float 7 is designed with a guide rib 7b at the outer circle of the cylinder and a middle groove structure, the gap between the upper float 7 and the spool 2 is increased while ensuring the guiding function, which can prevent the blowout from occurring during high-speed exhaust. At this time, the lower float 3 and the upper float 7 are both located at the lowest position.

[0046] 3. Closed sealing state of the valve (see Figure 2 ): When the gas in the pipeline is basically exhausted, the water level rises into the valve body 1, and the water flow enters the spool 2 through the windows 12 to submerge the lower float 3 and the upper float 7, the lower float 3 and the upper float 7 (both the lower float 3 and the upper float 7 are lighter than water and can float in water) will float up, the upper float 7 contacts the valve cover 8 to form a seal of the high-speed inlet and exhaust port, and the sealing seat 4 contacts the sealing surface of the exhaust nozzle 5 to form a seal of the trace exhaust port. As the water pressure in the valve body 1 increases, the sealing specific pressure of the sealing part increases, the valve is closed, and neither water nor gas can be discharged through the valve.

[0047] 4. Trace exhaust state (see Figure 3):In the valve closed, the pipeline has gas precipitation, will gradually gathered to the air valve body 1 installed in the pipeline local high point. When the gas increases in the top of the valve body 1, on the one hand will still float body 7 top off its protrusions 7a and valve cover 8 remain sealed state, on the other hand will make submerged float 3 water level drop, the float 3 will fall to open the seal seat 4 seal, exhaust nozzle 5 start exhaust. Exhaust nozzle 5 exhaust gas gathered here when the pressure drops, the water level rises, the float 3 with the water level rises and seal exhaust nozzle 5. Such structure makes gas can be discharged through the exhaust nozzle 5, but water can not. The structure of the trace exhaust to achieve interval exhaust, only exhaust function.

[0048] 5, negative pressure state (see Figure 1 ) air. When the pipeline due to pump, empty or burst pipe and appear negative pressure, water level drops, the external air pressure greater than the water pressure in the pipeline, the external air pressure on the upper body 7, 7 and the lower body 3 due to water level drop and fall, high speed into the exhaust port open, can immediately a large number of inhale external air and eliminate the pipeline vacuum. Upper body 7 using ultra high molecular weight polyethylene material, the sealing surface is very smooth and never rust, with the valve cover 8 form plane seal, will not occur due to long time sealing and sticky phenomenon, so in the presence of negative pressure can be timely, reliable sealing instantaneously.

[0049] The above only for the preferred embodiments of the present application and does not limit the present application, for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of the present application.

Claims

1. A high-pressure cylindrical air valve, comprising a valve body, a valve cover, a cylinder and a float in the cylinder, the valve body is open at both ends, one end is communicated with a pipeline as an inlet, the other end is provided with a valve cover as an outlet, the valve cover is provided with an exhaust passage; the cylinder is installed in the valve body and is fixedly connected with the valve body at the outlet of the valve body under the pressure of the valve cover; the float is located in the cylinder; characterized in that, The floating body comprises a lower floating body and an upper floating body arranged from bottom to top, the upper part of the lower floating body is provided with a sealing seat, the lower part of the upper floating body is provided with an exhaust nozzle communicated with the exhaust passage of the valve cover; the sealing seat of the upper part of the lower floating body can seal the exhaust nozzle of the lower part of the upper floating body; the top end of the casing is provided with an exhaust window, the bottom of the casing is provided with a hole; the end of the upper floating body towards the valve cover is in contact with the valve cover for sealing; when the lower floating body and the upper floating body are in the lowest position, the upper floating body does not block the window of the casing.

2. The high pressure barrel air valve of claim 1, wherein, The bottom surface of the upper floating body and the top surface of the lower floating body are both flat.

3. The high pressure barrel air valve of claim 1, wherein, The outer circumferential surface of the upper floating body is provided with guide ribs arranged circumferentially on the upper floating body, and grooves are formed between every two guide ribs.

4. The high pressure barrel air valve of claim 1, wherein, The lower floating body is a hollow structure.

5. The high pressure barrel air valve of claim 1, wherein, The casing is a hollow structure with a hemispherical bottom and a cylindrical body, and the lower floating body is also a hollow structure with a hemispherical bottom and a cylindrical body.

6. The high pressure barrel air valve of claim 5, wherein, The lower floating body comprises a body and a sealing block, the body is a hollow structure with a hemispherical bottom and a cylindrical body, and the sealing block blocks the opening, and the sealing seat is installed on the sealing block.

7. The high pressure barrel air valve of claim 1, wherein, Sealing rings are arranged between the valve body and the valve cover and between the upper floating body and the valve cover; the end of the upper floating body towards the valve cover is in contact with the valve cover for sealing, which means that the upper floating body and the valve cover are in contact and sealed by the sealing rings.

8. The high pressure barrel air valve of claim 1, wherein, A protective cover is further installed above the valve cover, and a protective net is further installed between the protective cover and the valve cover to prevent foreign matters from entering the valve body and affecting the sealing.

9. The high pressure barrel air valve of claim 1, wherein, The upper floating body is provided with a mounting hole of the exhaust nozzle, and the end of the exhaust nozzle upwardly extending is provided with a thread matched with the thread of the mounting hole; the end of the exhaust nozzle upwardly extending is further provided with a nut screwed with the end of the exhaust nozzle.

10. The high pressure barrel air valve of claim 1, wherein, The cross-sectional flow area between the valve body and the casing, the flow area of the window of the casing and the cross-sectional flow area of the exhaust passage of the valve cover are not less than the cross-sectional flow area of the inlet of the valve body.

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