Sealing performance detection device for Venturi valve

Abstract

The utility model relates to the technical field of venturi valves, in particular to a sealing performance detection device for a venturi valve, which comprises a venturi valve body, a connecting flange is fixedly connected to the middle of the venturi valve body, and a sealing ring is arranged on the inner wall of one side, close to the connecting flange, of the venturi valve body. The inflating pump is used for inflating the air bag through the connecting air pipe, the expansion condition of the air bag is observed, the pressure value of the air bag is displayed in real time through the pressure indicator, and if the expansion speed is too high and stops after reaching a certain degree in the expansion process of the air bag, and the value of the pressure indicator is stable, the sealing performance of the Venturi valve is good; if the air bag expands slowly or continuously, after the air bag reaches the maximum expansion state, if the pressure value is gradually reduced, it is indicated that the sealing performance of the Venturi valve is poor, and the risk of leakage exists, detection of the tiny leakage situation of the Venturi valve is facilitated, and the situation of misjudgment or omission is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of venturi valves, in particular to a sealing performance detection device for venturi valves. Background Art

[0002] The Venturi valve is an air volume control device manufactured based on the Venturi effect. The Venturi valve combines a mechanical pressure-independent regulator with a high-speed air flow controller to expand air flow control to the highest level. The Venturi valve is not affected by changes in duct pressure, has a wide air volume control range, responds quickly, and has precise adjustment.

[0003] The Venturi valve needs to maintain absolute sealing during use. In the existing testing of the sealing performance of the Venturi valve, the staff generally conducts a visual inspection after the use of the Venturi valve to check whether the valve and its sealing surface have obvious damage, wear or leakage. Relying on the subjective judgment of the staff will affect the test results. Some minor leakages cannot be discovered, which may lead to misjudgment or omission, thereby affecting the normal use of the Venturi valve. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a sealing performance detection device for a Venturi valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sealing performance detection device for a venturi valve, comprising a venturi valve body, a connecting flange is fixedly connected to the middle of the venturi valve body, a sealing ring is arranged on the inner wall of the venturi valve body close to the connecting flange, and a groove is arranged on the side of the sealing ring away from the venturi valve body;

[0007] An airbag is arranged in the groove, and a connecting air pipe is arranged on the upper side of the airbag. One end of the connecting air pipe is connected to the airbag, and the end of the connecting air pipe away from the airbag passes through the Venturi valve body and extends to the outside of the Venturi valve body and is connected to an air pump. A pressure indicator is arranged on the side of the connecting air pipe close to the air pump.

[0008] Preferably, the outer wall of the Venturi valve body is fixedly connected to a support seat, a drive motor is provided on a side of the support seat away from the connecting flange, the output end of the drive motor extends to the interior of the support seat and is connected to a primary driving wheel, the outer side of the primary driving wheel is meshingly connected to a primary driven wheel, the primary driven wheel is fixedly connected to a secondary driving wheel through a connecting shaft, the outer side of the secondary driving wheel is meshingly connected to a secondary driven wheel, the middle part of the secondary driven wheel is fixedly connected to a connecting rod, and one end of the connecting rod is fixedly connected to a movable valve plate.

[0009] Preferably, a cavity is provided inside the support seat, and the cavity is communicated with the interior of the venturi valve body.

[0010] Preferably, a static valve plate is fixedly connected to the inside of the Venturi valve body and on one side close to the connecting flange.

[0011] Preferably, an embedding groove is provided in the inner wall of the side of the venturi valve body close to the connecting flange, and the side of the sealing ring away from the airbag is embedded in the embedding groove.

[0012] The beneficial effects of the utility model are:

[0013] When the Venturi valve is in the closed state, use an air pump to inflate the airbag through the connecting air pipe, observe the expansion of the airbag and use the pressure indicator to display the air pressure of the airbag in real time. If the expansion speed is too fast and stagnates after reaching a certain level during the expansion of the airbag, and the value of the pressure indicator is stable, it means that the sealing performance of the Venturi valve is good. If the airbag expands slowly or continues to expand, when the airbag reaches the maximum expansion state, if the pressure value gradually decreases, it means that the sealing performance of the Venturi valve is poor and there is a risk of leakage. When the airbag is shrinking, the deflation speed is too fast and the air pressure value decreases, which means that the Venturi valve is leaking, which is beneficial to detect small leaks in the Venturi valve, avoids misjudgment or omissions, and will not affect the normal use of the Venturi valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a sealing performance detection device for a Venturi valve proposed by the utility model;

[0015] Figure 2 A schematic diagram of the connection structure between a venturi valve body and an air bag of a sealing performance detection device for a venturi valve proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between a venturi valve body and a drive motor of a sealing performance detection device for a venturi valve proposed by the utility model;

[0017] Figure 4 The utility model provides a schematic diagram of the connection structure of a movable valve plate and a stationary valve plate for a sealing performance detection device for a Venturi valve.

[0018] In the figure:

[0019] 1. Venturi valve body; 2. Connecting flange; 3. Sealing ring; 4. Air bag; 5. Connecting air pipe; 6. Air pump; 7. Pressure indicator; 8. Support seat; 9. Driving motor; 10. Primary driving wheel; 11. Primary driven wheel; 12. Secondary driving wheel; 13. Secondary driven wheel; 14. Connecting rod; 15. Moving valve plate; 16. Static valve plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0022] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0023] Example:

[0024] Reference Figure 1-4 A sealing performance detection device for a venturi valve comprises a venturi valve body 1, a connecting flange 2 is fixedly connected to the middle of the venturi valve body 1, a sealing ring 3 is arranged on the inner wall of the side of the venturi valve body 1 close to the connecting flange 2, and a groove is arranged on the side of the sealing ring 3 away from the venturi valve body 1;

[0025] An airbag 4 is arranged in the groove, and a connecting air pipe 5 is arranged on the upper side of the airbag 4. One end of the connecting air pipe 5 is connected to the airbag 4, and the end of the connecting air pipe 5 away from the airbag 4 passes through the Venturi valve body 1 and extends to the outside of the Venturi valve body 1 and is connected to an air pump 6. A pressure indicator 7 is arranged on the side of the connecting air pipe 5 close to the air pump 6.

[0026] The outer wall of the venturi valve body 1 is fixedly connected to a support seat 8, a driving motor 9 is arranged on the side of the support seat 8 away from the connecting flange 2, the output end of the driving motor 9 extends to the inside of the support seat 8 and is connected to a primary driving wheel 10, the outer side of the primary driving wheel 10 is meshedly connected to a primary driven wheel 11, the primary driven wheel 11 is fixedly connected to a secondary driving wheel 12 through a connecting shaft, the outer side of the secondary driving wheel 12 is meshedly connected to a secondary driven wheel 13, the middle part of the secondary driven wheel 13 is fixedly connected to a connecting rod 14, and one end of the connecting rod 14 is fixedly connected to a movable valve plate 15.

[0027] A cavity is provided inside the support seat 8 , and the cavity is communicated with the interior of the venturi valve body 1 .

[0028] A static valve plate 16 is fixedly connected to the inside of the Venturi valve body 1 and to one side close to the connecting flange 2 .

[0029] An embedding groove is provided in the inner wall of the venturi valve body 1 on one side close to the connecting flange 2 , and the side of the sealing ring 3 away from the air bag 4 is embedded in the embedding groove.

[0030] In this embodiment, when it is necessary to test the sealing performance of the venturi valve body 1, the drive motor 9 is first started. When the drive motor 9 is running, it drives the primary driving wheel 10 to rotate. When the primary driving wheel 10 rotates, it drives the primary driven wheel 11 to mesh with it. When the primary driven wheel 11 rotates, it drives the secondary driving wheel 12 to rotate. When the secondary driving wheel 12 rotates, it drives the secondary driven wheel 13 to mesh with it. When the secondary driven wheel 13 rotates, it drives the connecting rod 14 to rotate. When the connecting rod 14 rotates, it drives the movable valve plate 15 to rotate. When the movable valve plate 15 rotates, it changes from an open state to a closed state with the static valve plate 16, so that the venturi valve body 1 is completely closed, and the movable valve plate 15 and the static valve plate 16 are in a sealed state.

[0031] Furthermore, when the venturi valve body 1 is completely closed, the air pump 6 is started, and the air pump 6 gradually inflates the air bag 4 through the connecting air pipe 5. At this time, the expansion of the air bag 4 is observed and the pressure indicator 7 is used to display the air pressure value in the air bag 4 in real time. In the process of gradual expansion of the air bag 4, if the expansion speed of the air bag 4 is too fast and stops after reaching a certain degree, the value of the pressure indicator 7 is stable at this time, which means that the sealing performance of the venturi valve body 1 is good and can withstand a certain pressure. If the air bag 4 expands slowly or is in continuous expansion, when the air bag 4 reaches the maximum expansion state, stop injecting air into the air bag 4, and use the pressure indicator 7 to display the air pressure value in the air bag 4 in real time. 7 detects the pressure in the airbag 4. If the pressure value gradually decreases, it means that the sealing performance of the Venturi valve body 1 is poor and there is a risk of leakage. When the airbag 4 expands to a certain extent, the air pressure in the airbag 4 is gradually and slowly released, and the contraction of the airbag 4 is observed. If the airbag 4 stops at a fixed position during the contraction process and the air pressure value does not change, the Venturi valve body 1 maintains good sealing performance during the contraction process. If the airbag 4 contracts at a faster speed and the pressure indicator 7 drops too quickly, it means that the Venturi valve body 1 has a leakage phenomenon and the Venturi valve body 1 needs to be further repaired or replaced.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing performance detection device for a Venturi valve, comprising a Venturi valve body (1), characterized in that: A connecting flange (2) is fixedly connected to the middle of the Venturi valve body (1); a sealing ring (3) is provided on the inner wall of the Venturi valve body (1) on a side close to the connecting flange (2); and a groove is provided on a side of the sealing ring (3) away from the Venturi valve body (1); An air bag (4) is arranged in the groove, and a connecting air pipe (5) is arranged on the upper side of the air bag (4), one end of the connecting air pipe (5) is connected to the air bag (4), and the end of the connecting air pipe (5) away from the air bag (4) passes through the venturi valve body (1) and extends to the outside of the venturi valve body (1) and is connected to an air pump (6), and a pressure indicator (7) is arranged on the side of the connecting air pipe (5) close to the air pump (6).

2. A sealing performance detection device for a Venturi valve according to claim 1, characterized in that: The outer wall of the venturi valve body (1) is fixedly connected to a support seat (8); a drive motor (9) is arranged on a side of the support seat (8) away from the connecting flange (2); an output end of the drive motor (9) extends into the interior of the support seat (8) and is connected to a primary driving wheel (10); the outer side of the primary driving wheel (10) is meshingly connected to a primary driven wheel (11); the primary driven wheel (11) is fixedly connected to a secondary driving wheel (12) via a connecting shaft; the outer side of the secondary driving wheel (12) is meshingly connected to a secondary driven wheel (13); a connecting rod (14) is fixedly connected to the middle of the secondary driven wheel (13); one end of the connecting rod (14) is fixedly connected to a movable valve plate (15).

3. A sealing performance detection device for a Venturi valve according to claim 2, characterized in that: The support seat (8) is provided with a cavity inside, and the cavity is communicated with the inside of the Venturi valve body (1).

4. A sealing performance detection device for a Venturi valve according to claim 1, characterized in that: A static valve plate (16) is fixedly connected to the inside of the Venturi valve body (1) and to a side close to the connecting flange (2).

5. The sealing performance detection device for a Venturi valve according to claim 1, characterized in that: An embedding groove is provided in the inner wall of the side of the venturi valve body (1) close to the connecting flange (2), and the side of the sealing ring (3) away from the airbag (4) is embedded in the embedding groove.

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