High-pressure water mist nozzle flow coefficient measuring device

Abstract

The utility model relates to the technical field of detection equipment, in particular to a high-pressure water mist nozzle flow coefficient measuring device which comprises a water tank and a water conveying pipe with a water pump, one end of the water conveying pipe is arranged on one side of the water tank, and the water conveying pipe extends into the water tank. A plurality of energy absorption pipes communicated with the water conveying pipe are arranged at the middle section position, close to the other end, of the water conveying pipe.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a high-pressure fine water mist nozzle flow coefficient measuring device. Background Technology

[0002] The high-pressure fine water mist nozzle flow coefficient measuring device is an experimental device specifically designed to accurately determine the flow coefficient (K value) of high-pressure fine water mist nozzles. Its core purpose is to determine the actual water flow rate of the nozzle under a specific working pressure, thereby calculating its flow coefficient K. The K value is a key performance parameter of the nozzle. The fire protection system matched with the nozzle is designed based on the K value, and the fire sprinkler head is verified to meet relevant standards. Furthermore, the K value can be used to ensure the consistency of performance of nozzles produced in batches. The flow coefficient measuring device typically consists of a water supply pipe with a water pump and a water tank connected to the water supply pipe. The nozzle can be connected to the end of the water supply pipe, and a pressure gauge and a flow meter are installed in the middle section of the water supply pipe. The K value of the nozzle is determined by the readings from the pressure gauge and the flow meter.

[0003] Although the existing technologies mentioned above can solve the corresponding technical problems, they still have certain drawbacks: when the existing measuring device is in use, if the nozzle is closed after the data measurement is completed, the water flow in the water pipe will be converted into pressure energy instantly due to the inertia of the flow. This will cause the high pressure generated by the water flow to be applied to the water pipe and the pressure gauge and flow meter on the water pipe, which can easily cause damage to the pressure gauge and flow meter due to the sudden high pressure impact, affecting the service life of the flow coefficient measuring device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a high-pressure fine water mist nozzle flow coefficient measuring device that has a long service life and is not easily damaged by the pressure gauge and flow meter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure fine water mist nozzle flow coefficient measuring device, comprising a water tank and a water supply pipe with one end set on one side of the water tank and extending into the water tank and equipped with a water pump, wherein a pressure gauge is provided in the middle section of the water supply pipe, a flow meter is also provided in the middle section of the water supply pipe, and a plurality of energy-absorbing tubes connected to the water supply pipe are provided in the middle section near the other end of the water supply pipe.

[0006] A further improvement is that the other end of the water supply pipe is equipped with a nozzle connection threaded pipe.

[0007] A further improvement is that a support bracket is provided in the middle section of the water supply pipe.

[0008] A further improvement is that the energy-absorbing pipe includes a pipe body located in the middle section of the water supply pipe and an openable cover that is movably engaged with the top of the pipe body. An energy-absorbing block is slidably provided at the bottom of the inner wall of the pipe body, and the outer edge of the energy-absorbing block is attached to and can seal the pipe body.

[0009] A further improvement is that a silicone sealing ring is provided at the top of the tube.

[0010] A further improvement is that an enlarged plate is provided on the outer wall at the bottom of the tube.

[0011] A further improvement is that the inner wall of the tube is integrally formed with a first friction layer.

[0012] A further improvement is that the energy-absorbing block includes a movable piece that fits against the outer wall edge and can seal the tube body, and a second friction layer integrally formed on the edge of the movable piece.

[0013] A further improvement is that the bottom of the movable piece has an integrally formed through-hole, and an arc-shaped cover is fixedly provided on the top surface of the movable piece at the edge of the through-hole. A vortex cavity is formed between the lower surface of the arc-shaped cover and the movable piece.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are as follows: During the use of this utility model, after the test is completed, the nozzle is closed. At this time, due to the inertia of the water flow, the kinetic energy of the water flow is instantly converted into pressure energy, which causes a large amount of water flow to be forced into the energy-absorbing tube and pushes the energy-absorbing block inside the energy-absorbing tube to move. During the movement of the energy-absorbing block, strong frictional resistance is generated with the inner wall of the tube. As a result, the pressure energy generated by the water flow is offset by the frictional force generated during the movement of the energy-absorbing block. This greatly reduces the impact of the pressure energy generated during the nozzle closure process on the pressure gauge and flow meter of the measuring device, and makes the service life of the measuring device longer. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the structural schematic diagram of the measuring device of this utility model;

[0017] Figure 2 This is a structural schematic diagram of the front view cross-section of the energy-absorbing tube of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the front view cross-section of the energy-absorbing block of this utility model. Detailed Implementation

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0020] See Figure 1-3 As shown, the technical solution adopted in this specific embodiment is: a high-pressure fine water mist nozzle flow coefficient measuring device, including a water tank 1 and a water supply pipe 2 with one end set on one side of the water tank 1 and extending into the water tank 1 and equipped with a water pump 3. A pressure gauge 4 is provided in the middle section of the water supply pipe 2, and a flow meter 5 is also provided in the middle section of the water supply pipe 2. Several energy-absorbing pipes 7 are provided in the middle section of the water supply pipe 2 near the other end, and are interconnected with the water supply pipe 2. The energy-absorbing pipe 7 includes a pipe body 71 set in the middle section of the water supply pipe 2 and an opening and closing cover 72 that is movably engaged with the top of the pipe body 71. An energy-absorbing block 73 is slidably provided at the bottom of the inner wall of the pipe body 71. The outer edge of the energy-absorbing block 73 is attached to and can close the pipe body 71. The energy-absorbing block 73 includes The movable piece 731, which fits and seals the outer edge of the pipe 71, and the second friction layer 732, integrally formed on the edge of the movable piece 731, are used in the following way: The water tank 1 is filled with water so that the end of the water supply pipe 2 is submerged. The nozzle is then connected to the other end of the water supply pipe 2. The nozzle is then turned on, and water is pumped from the water tank 1 by the water pump 3 to expel air from the water supply pipe 2 and the nozzle. The power of the water pump 3 is then increased to draw a large amount of water from the water tank 1, which is then guided through the water supply pipe 2 and output from the nozzle. At this point, the flow rate Q and pressure P in the pipe can be obtained using the flow meter 5 and pressure gauge 4, and then calculated using the formula... After obtaining the K value, i.e., the flow coefficient, the nozzle is closed after use. At this time, the water flow in the water pipe 2 will be converted into pressure energy due to the inertia of the flow. The water flow will be forced into the energy absorption pipe 7 due to its pressure, thus causing a large amount of water to enter the energy absorption pipe 7. This will push the moving piece 731 of the energy absorption block 73 in the energy absorption pipe 7 to move along the pipe body 71. During the movement of the moving piece 731, the air in the pipe body 71 will be discharged from the top of the pipe body 71 and open the opening and closing cover 72 to discharge the air. At this time, when pushing the air, some resistance will be generated to offset the water pressure. At the same time, frictional resistance will be generated between the second friction layer 732 and the inner wall of the pipe body 71. The second friction layer 732 is made of asbestos friction material, which is existing technology. Therefore, the pressure energy generated by the water flow will be offset by the friction generated during the movement of the moving piece 732 of the energy absorption block 73. This will greatly reduce the impact of the pressure energy generated during the closing of the nozzle on the pressure gauge 4 and flow meter 5 of the measuring device, and extend the service life of the measuring device.

[0021] The other end of the water supply pipe 2 is equipped with a nozzle connection threaded pipe 6, which makes it easier to install the nozzle into the end of the water supply pipe 2 more quickly;

[0022] The middle section of the water pipe 2 is equipped with a support bracket 8, which is conducive to raising the water pipe 2, so that the water pipe 2 occupies less ground space and makes it convenient for personnel to directly observe the pressure gauge 4 and flow meter 5 without having to bend over to observe.

[0023] The top of the tube body 71 is also provided with a silicone sealing ring 74, which helps to improve the sealing of the top of the tube body 71 and allows the top of the tube body 71 to be better sealed when the energy-absorbing tube 7 is not in use.

[0024] An enlarged plate 76 is provided on the outer wall of the bottom of the pipe body 71, which helps to make the connection between the bottom of the pipe body 71 and the water supply pipe 2 more secure and stable.

[0025] The inner wall of the pipe body 71 is also integrally formed with a first friction layer 75. The first friction layer 75 can be made of asbestos woven friction material, which is an existing technology. This is beneficial to improve the friction coefficient of the inner wall of the pipe body 71, so that the second friction layer 732 can generate greater friction resistance when it comes into contact with it, thereby improving the performance of counteracting water flow pressure.

[0026] The bottom of the movable piece 731 is integrally formed with a through opening 733. An arc-shaped cover 734 is fixedly provided on the top surface of the movable piece 731 at the edge of the through opening 733. A vortex cavity 735 is formed between the lower surface of the arc-shaped cover 734 and the movable piece 731. This is beneficial because after the water flow is pressed in, it can be forced into the arc-shaped cover 734 through the through opening 733, and vortices are generated in the vortex cavity 735 to impact each other, offsetting part of the pressure energy. At the same time, it increases the contact area between the water flow and the movable piece 731, allowing the movable piece to absorb more water pressure and slide upward, thereby reducing the time it takes for the movable piece to absorb water pressure.

[0027] The working principle of this utility model is as follows: When using this utility model, the water tank 1 is filled with water so that the end of the water supply pipe 2 is submerged. Then, the nozzle is connected to the other end of the water supply pipe 2. First, the nozzle is turned on, and the water pump 3 draws water from the water tank 1, thereby expelling air from the water supply pipe 2 and the nozzle. Then, the power of the water pump 3 is increased, causing a large amount of water to be drawn from the water tank 1 and guided through the water supply pipe 2 to be output from the nozzle. At this time, the flow rate Q and pressure P in the pipeline can be obtained through the flow meter 5 and pressure gauge 4. The flow rate Q and pressure P in the pipeline can then be calculated using the formula... After obtaining the K value, i.e., the flow coefficient, the nozzle is closed after use. At this time, the water flow in the water supply pipe 2 will be converted into pressure energy due to the inertia of the flow. The water flow will be forced into the energy absorption pipe 7 due to its pressure, thus causing a large amount of water to enter the energy absorption pipe 7. This will push the moving plate 731 of the energy absorption block 73 in the energy absorption pipe 7 to move along the pipe body 71. During the movement of the moving plate 731, the air in the pipe body 71 will be discharged from the top of the pipe body 71 and open the opening and closing cover 72 to expel the air. At this time, when pushing the air, some resistance will be generated to offset the water pressure. At the same time, frictional resistance will be generated between the second friction layer 732 and the inner wall of the pipe body 71. The second friction layer 732 is made of asbestos friction material, which is existing technology. Therefore, the pressure energy generated by the water flow will be offset by the friction generated during the movement of the moving plate 732 of the energy absorption block 73. This significantly reduces the impact of the pressure energy generated during the nozzle closure process on the pressure gauge 4 and flow meter 5 of the measuring device, thus extending the service life of the measuring device.

[0028] This utility model aims to protect the structure of the product. The model numbers of the components are not the focus of this utility model's protection, as they are common technology. Any component on the market that can achieve the functions described above can be used as an option. Therefore, the model numbers and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the various components.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A high-pressure fine water mist nozzle flow coefficient measuring device, comprising a water tank (1) and a water supply pipe (2) with one end disposed on one side of the water tank (1) and extending into the water tank (1) and equipped with a water pump (3), wherein a pressure gauge (4) is provided in the middle section of the water supply pipe (2), and a flow meter (5) is also provided in the middle section of the water supply pipe (2), characterized in that: Several energy-absorbing pipes (7) are provided in the middle section near the other end of the water supply pipe (2).

2. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 1, characterized in that: The other end of the water supply pipe (2) is provided with a nozzle connection threaded pipe (6).

3. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 1, characterized in that: The water pipe (2) is provided with a support bracket (8) in the middle section.

4. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 1, characterized in that: The energy-absorbing pipe (7) includes a pipe body (71) located in the middle section of the water pipe (2) and an opening and closing cover (72) that is movably engaged with the top of the pipe body (71). An energy-absorbing block (73) is slidably provided at the bottom of the inner wall of the pipe body (71), and the outer edge of the energy-absorbing block (73) is attached to and can close the pipe body (71).

5. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 4, characterized in that: The top of the tube (71) is also provided with a silicone sealing ring (74).

6. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 4, characterized in that: The bottom outer wall of the tube (71) is provided with an enlarged plate (76).

7. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 4, characterized in that: The inner wall of the tube (71) is also integrally formed with a first friction layer (75).

8. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 4, characterized in that: The energy-absorbing block (73) includes a movable piece (731) that fits the outer wall edge and can seal the tube (71) and a second friction layer (732) integrally formed on the edge of the movable piece (731).

9. The high-pressure fine water mist nozzle flow coefficient measuring device according to claim 8, characterized in that: The bottom of the movable piece (731) is integrally formed with a through opening (733), and an arc-shaped cover (734) is fixedly provided on the top surface of the movable piece (731) at the edge of the through opening (733). A vortex cavity (735) is formed between the lower surface of the arc-shaped cover (734) and the movable piece (731).

Images