Venturi valve negative pressure experiment device

Abstract

The utility model provides a venturi valve negative pressure experiment device, and belongs to the technical field of experiment devices. Comprising a containing frame, a groove is formed in the containing frame, a limiting part is arranged in the groove, an elastic arc plate is arranged in the groove, an arc-shaped clamping plate is arranged at one end of the elastic arc plate, a connecting limiting plate is arranged at one end of the arc-shaped clamping plate, and a plurality of limiting blocking pieces are arranged at one end of the connecting limiting plate; a second weakening groove is formed in the inner wall of the limiting blocking piece. According to the utility model, through the arrangement of the limiting part, the position of the valve to be detected in the placing frame can be limited, and the problems that the position of the valve to be detected in the placing frame is deviated due to shaking during hoisting, the valve to be detected cannot be aligned with a flange of a pipeline, the position of the valve to be detected needs to be adjusted again, and the operation is inconvenient are solved. A to-be-tested valve cannot be quickly installed in an experimental device, and the installation efficiency is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental devices, and particularly relates to a Venturi valve negative pressure experimental device. Background Art

[0002] The Venturi valve is an air flow control device designed based on the Venturi effect and is widely used in occasions where precise air flow control is required, such as laboratories, clean rooms, negative pressure isolation wards in hospitals, GMP workshops, etc. Its working principle is that when the fluid passes through the contraction section of the valve, the flow rate increases and the static pressure decreases, thereby generating a pressure recovery in the expansion section of the valve. In a negative pressure experimental device, the Venturi valve can be used to control and maintain a negative pressure environment, which is crucial for preventing the diffusion of harmful gases or microorganisms.

[0003] When conducting a negative pressure experiment on the valve, it is necessary to align the flange of the valve to be tested with the pipeline flange to ensure the installation quality. However, since some valves are large in size, it is necessary to use a lifting device to lift the valve during installation and then perform the alignment operation. Since the valve is prone to shaking after being lifted and is not easy to control, it is impossible to accurately align it, resulting in the inability to quickly install it. Therefore, this application provides a Venturi valve negative pressure experimental device to meet the requirements. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a Venturi valve negative pressure experimental device to solve the problem that the existing negative pressure experimental device is prone to shaking and difficult to control after being hoisted and installed, resulting in the inability to accurately align it and the inability to quickly install it.

[0005] To solve the above technical problem, the utility model provides the following technical solutions:

[0006] A Venturi valve negative pressure experimental device includes an experimental device, a bracket, and a placement frame. The experimental device is arranged on the top of the bracket. The bottom of the placement frame is provided with a base, and the base is placed on the top of the bracket. The interior of the placement frame is provided with a valve to be tested. The interior of the placement frame is provided with a groove, and a limiting component is arranged inside the groove. The limiting component includes an elastic arc plate, the elastic arc plate is arranged inside the groove, one end of the elastic arc plate is provided with an arc-shaped clamping plate, one end of the arc-shaped clamping plate is provided with a connecting limiting plate, and one end of the connecting limiting plate is provided with a plurality of limiting tabs.

[0007] Optionally, the inner wall of the elastic arc plate is provided with a first weakening groove. The shape of the elastic arc plate is an arc-shaped curved elastic plate and is made of a metal material.

[0008] Optionally, the connecting limiting plate and the limiting tabs are of an integral structure, and the limiting tabs are linearly arranged at one end of the connecting limiting plate.

[0009] Optionally, a second weakening groove is provided on the inner wall of the limiting flap. The limiting flap is made of an arcuate curved elastic plate and is made of metal material.

[0010] Optionally, placing frames are provided at both ends of the placing frame. The shape of the placing card frame is the same as that of the flange of the valve to be tested, and the valve to be tested is clamped inside the placing card frame.

[0011] Optionally, a flange limiting frame is provided on the outer wall of the placing card frame, and a guiding limiting plate is provided at the bottom of the flange limiting frame. The guiding limiting plate is in an L shape.

[0012] Optionally, the flange limiting frame is in a semi-circular arc structure, and the shape of the flange limiting frame is the same as that of the flange. The outer wall of the flange is in contact with the inner wall of the flange limiting frame.

[0013] Optionally, hoisting connection rings are provided at the four corners of the placing frame.

[0014] Optionally, the elastic arc plate and the arc-shaped clamping plate are of an integral structure. The arc-shaped clamping plate is made of an arcuate curved elastic plate and is made of metal material. The radian of the arc-shaped clamping plate is the same as that of the placing frame.

[0015] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0016] In the above solution, by providing a limiting component, the position of the valve to be tested placed in the placing frame can be limited, avoiding the position of the valve to be tested in the placing frame from shifting due to shaking during hoisting, resulting in the flange of the valve to be tested not being aligned with the flange of the pipeline, and the need to readjust the position of the valve to be tested, making it impossible to quickly install the valve to be tested into the experimental device and affecting the installation efficiency.

[0017] By providing a placing frame, a placing card frame and a flange limiting frame, when installing the valve to be tested, the placing frame moves downward along the flange edge under the condition of hoisting, and the placing frame can be blocked by the flange limiting frame, so that the flange of the valve to be tested can be quickly aligned with the pipeline flange, and at the same time, the installation quality can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present utility model and, together with the specification, are further used to explain the principles of the present utility model and enable those skilled in the relevant art to implement and use the present utility model.

[0019] Figure 1 It is a schematic three-dimensional structure diagram of a Venturi valve negative pressure experimental device;

[0020] Figure 2Schematic enlarged three-dimensional structure of the placement frame cooperating with the limiting component;

[0021] Figure 3 is Figure 2 Schematic sectional three-dimensional structure;

[0022] Figure 4 is Figure 3 Schematic enlarged structure at position B in the middle.

[0023] Reference numerals:

[0024] 1. Experimental device; 2. Bracket; 3. Placement frame; 4. Limiting component; 5. Valve to be tested; 6. Groove; 7. Flange limiting frame; 8. Base; 9. Guide limiting plate; 10. Lifting connection ring; 11. Placement clamping frame; 401. Elastic arc plate; 402. Arc-shaped clamping plate; 403. Connecting limiting plate; 404. Limiting stop; 405. First weakening groove; 406. Second weakening groove.

[0025] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0026] The following describes in detail a Venturi valve negative pressure experimental device provided by the present invention in conjunction with the drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0027] It should be noted that in the specification, references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0028] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather can alternatively, at least in part depending on the context, allow for the existence of other factors that are not necessarily explicitly described.

[0029] It will be understood that the meanings of "on", "above", and "over" in the present utility model should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0030] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptors used herein can be interpreted accordingly.

[0031] As Figures 1 to 4As shown in the figure, an embodiment of the present utility model provides a Venturi valve negative pressure experiment device, which includes an experimental device 1, a bracket 2 and a placement frame 3. The experimental device 1 is arranged on the top of the bracket 2. The bottom of the placement frame 3 is provided with a base 8, and the base 8 is placed on the top of the bracket 2. A valve to be tested 5 is arranged inside the placement frame 3. Hoisting connection rings 10 are arranged at the four corners of the placement frame 3. A groove 6 is arranged inside the placement frame 3, and a limiting component 4 is arranged inside the groove 6. The limiting component 4 includes an elastic arc plate 401, and the elastic arc plate 401 is arranged inside the groove 6. One end of the elastic arc plate 401 is provided with an arc-shaped clamping plate 402, one end of the arc-shaped clamping plate 402 is provided with a connecting limiting plate 403, and one end of the connecting limiting plate 403 is provided with a number of limiting flanges 404. The inner wall of the elastic arc plate 401 is provided with a first weakening groove 405. The elastic arc plate 401 is in the shape of an arc-shaped curved elastic plate and is made of a metal material. The connecting limiting plate 403 and the limiting flanges 404 are of an integral structure. The limiting flanges 404 are linearly arranged at one end of the connecting limiting plate 403. The inner wall of the limiting flanges 404 is provided with a second weakening groove 406. The limiting flanges 404 are in the shape of an arc-shaped curved elastic plate and are made of a metal material. The elastic arc plate 401 and the arc-shaped clamping plate 402 are of an integral structure. The arc-shaped clamping plate 402 is in the shape of an arc-shaped curved elastic plate and is made of a metal material. The radian of the arc-shaped clamping plate 402 is the same as that of the placement frame 3. By setting the limiting component 4, the elastic arc plate 401 is in the shape of an S shape and has a certain elasticity. The first weakening groove 405 is arranged at the bending part of the elastic arc plate 401. The elastic arc plate 401 and the arc-shaped clamping plate 402 are of an integral structure. The arc-shaped clamping plate 402 is in the shape of a C shape and has the same radian as the placement frame 3. When placing the valve to be tested 5 inside the placement frame 3, by using the elasticity of the elastic arc plate 401 and cooperating with the arc-shaped clamping plate 402, different valves to be tested 5 can be clamped and fixed, avoiding the valve to be tested 5 from shaking inside the placement frame 3. The limiting flanges 404 are in the shape of a C-shaped arc-shaped curved elastic plate and have a certain elasticity. The connecting limiting plate 403 and the limiting flanges 404 are of an integral structure. A plurality of limiting flanges 404 are linearly arranged at one end of the connecting limiting plate 403. When placing the valve to be tested 5 inside the placement frame 3, since there are protrusions at the bottom of the valve to be tested 5, the protrusions are stuck inside the groove 6, and then by using the elasticity of the limiting flanges 404, the limiting flanges 404 can clamp the protrusions at the bottom of the valve to be tested 5, and further limit the valve to be tested 5. The position of the valve to be tested 5 placed in the placement frame 3 can be limited, avoiding the position of the valve to be tested 5 in the placement frame 3 from shifting due to shaking during hoisting, resulting in the flange of the valve to be tested 5 not being aligned with the pipeline, and the need to readjust the position of the valve to be tested 5 again, and being unable to quickly install the valve to be tested 5 into the experimental device 1, affecting the installation efficiency.

[0032] As Figures 1 to 3As shown in the figure, placing frames 3 are provided at both ends thereof with placing clamping frames 11. The shape of the placing clamping frames 11 is the same as that of the flange of the valve 5 to be tested. The valve 5 to be tested is clamped inside the placing clamping frames 11. The outer wall of the placing clamping frames 11 is provided with flange limiting frames 7. The bottom of the flange limiting frames 7 is provided with guiding limiting plates 9. The shape of the guiding limiting plates 9 is L-shaped. The shape of the flange limiting frames 7 is a semi-circular arc structure. The shape of the flange limiting frames 7 is the same as that of the flange. The outer wall of the flange is in contact with the inner wall of the flange limiting frames 7. By providing the placing frames 3, the placing clamping frames 11 and the flange limiting frames 7, the placing clamping frames 11 are arranged at both ends of the placing frames 3 and are in a mirror image structure. The flange limiting frames 7 are arranged on the outer walls of the placing clamping frames 11. The flange limiting frames 7 and the placing clamping frames 11 are in circumferential mirror symmetry. When installing the valve 5 to be tested, the placing frames 3 are moved downward along the flange edge under the condition of hoisting. The flange limiting frames 7 can be used to block the placing frames 3, so that the flange of the valve 5 to be tested can be quickly aligned with the pipeline flange, and at the same time, the installation quality can be ensured.

[0033] The working principle of the technical solution provided by the present utility model is as follows: When a negative pressure test needs to be performed on the valve 5 to be tested, first place the valve 5 to be tested inside the placing frame 3, use the arc-shaped clamping plate 402 to limit the valve 5 to be tested, and make the protrusion at the bottom of the valve 5 to be tested stuck in the groove 6. Then, use the multiple limiting flanges 404 provided at one end of the connecting limiting plate 403 to clamp the protrusion at the bottom of the valve 5 to be tested, and further limit the valve 5 to be tested, which can avoid the position of the valve 5 to be tested in the placing frame 3 from shifting due to shaking during hoisting. Then, use the hoisting connection ring 10 to hoist the placing frame 3, so that the placing frame 3 moves downward along the pipeline flange edge, so that the pipeline flange slides into the flange limiting frame 7, and place the base 8 on the bracket 2. At the same time, use the flange limiting frame 7 to block the placing frame 3, so that the flange of the valve 5 to be tested can be quickly aligned with the pipeline flange, and the valve 5 to be tested can be quickly connected to the experimental device 1. Then, open the air source, and the compressed air is ejected at a high speed through the Venturi nozzle, forming a low-pressure area on the outlet side of the test pipeline, exhausting the air inside the device, forming a negative pressure area. When the pressure gauge and the pressure sensor detect that the system vacuum degree reaches -0.08 MPa and is stable for 15 s, the solenoid valve is controlled to close by the PLC control box, and continuously monitor and record that the change range of the pressure value does not exceed -0.08 MPa ± 0.002, and the change of the internal pressure at the end of 2 hours does not exceed 0.002 MPa, and the sealing effect of the test valve under the negative pressure (external pressure) state.

[0034] The present utility model covers any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present utility model. In order to enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the following preferred embodiments of the present utility model, and those skilled in the art can fully understand the present utility model without the description of these details. In addition, well-known methods, processes, procedures, components and circuits, etc. are not described in detail in order to avoid unnecessary confusion to the essence of the present utility model.

[0035] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A Venturi valve negative pressure experimental device, characterized in that, It includes an experimental device, a bracket and a placement frame. The experimental device is arranged on the top of the bracket. The bottom of the placement frame is provided with a base, and the base is placed on the top of the bracket. A valve to be tested is arranged inside the placement frame. A groove is arranged inside the placement frame, and a limiting component is arranged inside the groove. The limiting component includes an elastic arc plate. The elastic arc plate is arranged inside the groove. One end of the elastic arc plate is provided with an arc-shaped clamping plate. One end of the arc-shaped clamping plate is provided with a connecting limiting plate, and several limiting flanges are arranged at one end of the connecting limiting plate.

2. The Venturi valve negative pressure experimental device according to claim 1, wherein A first weakening groove is arranged on the inner wall of the elastic arc plate. The elastic arc plate is in the shape of an arc-shaped curved elastic plate and is made of metal material.

3. The Venturi valve negative pressure experimental device according to claim 1, characterized in that, The connecting limiting plate and the limiting flanges are of an integral structure, and the limiting flanges are linearly arranged at one end of the connecting limiting plate.

4. The Venturi valve negative pressure experimental device according to claim 3, characterized in that, A second weakening groove is arranged on the inner wall of the limiting flange. The limiting flange is in the shape of an arc-shaped curved elastic plate and is made of metal material.

5. The Venturi valve negative pressure experimental device according to claim 1, characterized in that, Placement clamping frames are arranged at both ends of the placement frame. The shape of the placement clamping frame is the same as that of the flange of the valve to be tested, and the valve to be tested is clamped inside the placement clamping frame.

6. The Venturi valve negative pressure experimental device according to claim 5, characterized in that A flange limiting frame is arranged on the outer wall of the placement clamping frame. A guiding limiting plate is arranged at the bottom of the flange limiting frame, and the guiding limiting plate is in the shape of an L.

7. The Venturi valve negative pressure experimental device according to claim 6, characterized in that, The flange limiting frame is in the shape of a semi-circular arc structure, and the shape of the flange limiting frame is the same as that of the flange. The outer wall of the flange is in contact with the inner wall of the flange limiting frame.

8. The Venturi valve negative pressure experimental device according to claim 1, characterized in that, Several hoisting connection rings are arranged on the outer wall of the placement frame.

9. The Venturi valve negative pressure experimental device according to claim 1, characterized in that, The elastic arc plate and the arc-shaped clamping plate are of an integral structure. The arc-shaped clamping plate is in the shape of an arc-shaped curved elastic plate and is made of metal material. The radian of the arc-shaped clamping plate is the same as that of the placement frame.

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