Fine water mist nozzle flow test equipment

Abstract

The invention relates to the technical field of nozzle flow detection equipment, and discloses water mist nozzle flow test equipment, which comprises a tank body, the top end of the tank body is in threaded connection with an end cover, the interior of the end cover is movably connected with a hollow connecting rod, and the bottom end of the hollow connecting rod is fixedly provided with a water mist nozzle to be tested. A piston is fixedly installed at the bottom of the outer surface of the hollow connecting rod, and a pressure relief device is fixedly installed on one side of the top end of the piston. According to the water mist nozzle flow test equipment provided by the invention, the piston is arranged, when water gathered at the bottom of the inner cavity of the tank body is gradually increased, the pressure of the inner cavity is gradually increased, and a first through hole can be forced to move upwards and compress a second elastic piece; and the first through hole and the second through hole are communicated so as to perform pressure relief operation on the bottom of the inner cavity of the tank body and reduce the pressure of the inner cavity of the tank body, so that the pressure of the bottom of the inner cavity of the tank body can be always kept in a relatively constant range.

Description

Technical Field

[0001] The present application relates to the technical field of nozzle flow detection equipment, and in particular to a water mist nozzle flow test equipment. Background Art

[0002] The flow rate detection of the sprinkler head refers to the amount of water passing through the sprinkler head per unit time under the specified pressure conditions. It is one of the important indicators to measure the performance of the sprinkler head. It is widely used in agricultural irrigation, garden sprinkler irrigation, fire fighting and industrial cleaning. Among them, atmospheric pressure will also have a corresponding impact on the flow rate of the water mist nozzle, that is, the decrease in atmospheric pressure will make the flow rate of the water mist nozzle decrease, and the increase in atmospheric pressure will also make the flow rate of the water mist nozzle increase. However, in the existing nozzle flow testing equipment, as water accumulates in a closed container, the internal pressure also increases, and it is difficult to ensure the constant pressure in the closed container. When testing the water mist nozzle, it is very easy to cause the increase in the pressure in the closed container, which will cause the flow rate of the water mist nozzle to increase, and then cause the data for the water mist nozzle flow test to be larger and the accuracy to be lower. The test data is difficult to apply to a normal air pressure environment, and the stability and reliability are poor.

[0003] Therefore, there is an urgent need for a closed container structure for water mist nozzle testing to solve the defects existing in the above-mentioned existing testing equipment during actual operation. Summary of the invention

[0004] The present application proposes a water mist nozzle flow rate testing device, which has the advantages of being able to always keep the pressure in a closed container constant as the amount of water in the closed container increases, and making the water mist nozzle flow rate test data more accurate. The device is used to solve the problem that in existing nozzle flow rate testing equipment, as water accumulates in a closed container, the internal pressure increases accordingly, making it difficult to ensure the constant pressure in the closed container, which can easily lead to an increase in the water mist nozzle flow rate due to the increase in pressure in the closed container when testing the water mist nozzle, thereby causing the water mist nozzle flow rate test data to be larger and less accurate, and the test data to be difficult to apply to a normal air pressure environment.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a fine water mist nozzle flow test device, comprising a tank body that can be fixedly installed on an operating table by bolts, a drainage pipe connected to its inner cavity is fixedly installed at the bottom end of the tank body, and the other end of the drainage pipe is connected to a weighing system, so that the water gathered in the inner cavity of the tank body can be weighed, the top end of the tank body is threadedly connected to an end cover, the end of the end cover is movably connected to a hollow connecting rod, and a water mist nozzle to be tested is fixedly installed at the bottom end of the hollow connecting rod, and the top end of the hollow connecting rod is connected to an external water supply system, so that during the test, the water supply system is used to make the water mist nozzle start to operate for a certain period of time, and pass The flow rate of the water mist nozzle is calculated by weighing the water gathered in the inner cavity of the tank body within a certain period of time. A piston is fixedly installed at the bottom of the outer surface of the hollow connecting rod, and a closed chamber can be formed at the bottom of the inner cavity of the tank body under the action of the piston to store the water sprayed by the water mist nozzle. A pressure relief device is fixedly installed on one side of the top of the piston, and the pressure relief device includes a guide rod fixedly installed in the interior of the piston, the bottom end of the guide rod extends to the bottom end of the piston, and the top end of the guide rod extends to the top of the end cover, the guide rod is movably sleeved with a shaft rod, and the shaft rod and the guide rod are transmission-connected through a second elastic member movably sleeved on the outer surface of the shaft rod and set as a constant pressure structure.

[0006] Furthermore, a first through hole is opened inside the shaft rod, and its bottom end extends to the bottom end of the piston. A second through hole is opened at the top of the outer surface of the guide rod and at the top end of the end cover, and is arranged perpendicular to the first through hole. The top end of the first through hole and the second through hole are initially staggered with each other.

[0007] Furthermore, the bottom end of the piston is provided with a plurality of groups of first elastic members arranged in a ring array, and a scraper ring whose outer wall contacts the inner wall of the tank body is fixedly installed at the bottom of the first elastic member. The scraper ring can then be used to scrape the inner wall of the tank body to effectively prevent the inner wall of the tank body from being affected by water droplets hanging on the wall, which may cause the data measured by the weighing system to be low, thereby solving the problem of poor flow test accuracy of the water mist nozzle.

[0008] Furthermore, a connecting pipe is provided on the other side of the end cover, the bottom end of which extends to the bottom of the first elastic member, and the other end of the connecting pipe is connected to the air pressure pump station, so that a certain amount of air can be filled into the bottom of the tank body cavity to adjust the pressure in the initial state, thereby simulating the operating environment of the water mist nozzle under different pressures.

[0009] Furthermore, the top end of the shaft extends to the top of the guide rod, and a locking nut is provided on the top of the guide rod and is threadedly connected to the outer surface of the shaft rod. The initial elastic force of the second elastic member can be regulated by adjusting the relative position between the guide rod and the shaft rod, and the initial pressure at the bottom of the tank body cavity can be regulated in cooperation with the connecting pipe to test the flow rate of the water mist nozzle under different pressure environments.

[0010] Furthermore, a driving mechanism is provided at the bottom of the end cover which is transmission-connected to the outer surface of the hollow connecting rod, so that when the water gathered at the bottom of the tank body cavity is drained, the driving mechanism is triggered to drive the piston and the scraper ring thereon to move downward to scrape off the water droplets on the inner wall of the tank body, and when the scraper ring moves to the lowest position, the driving mechanism is triggered in reverse to drive the piston and the scraper ring thereon to return to their initial position.

[0011] Furthermore, an electrical feedback connection is formed between the driving mechanism and the connecting tube, so that when the driving mechanism is triggered and drives the piston and the scraper ring to move up and down, the connecting tube is triggered synchronously to inflate or exhaust the bottom of the tank body cavity, thereby balancing the pressure to ensure the smoothness and stability of the piston and the scraper ring during the up and down movement.

[0012] The beneficial effects of the present invention are as follows: 1. The present application provides a water mist nozzle flow rate testing device. With respect to the setting of the piston, when the water gathered at the bottom of the inner cavity of the tank body gradually increases, the pressure in the inner cavity gradually increases, which can force the first through hole to move upward and compress the second elastic member, so that the first through hole is connected to the second through hole to perform a pressure relief operation on the bottom of the inner cavity of the tank body and reduce its pressure, thereby ensuring that the pressure at the bottom of the inner cavity of the tank body can always be maintained within a relatively constant range, so that the flow rate testing device has a higher accuracy for the water mist nozzle flow rate test.

[0013] 2. The present application provides a water mist nozzle flow rate testing device. The setting of the first elastic part on the piston can trigger the driving mechanism to drive the piston and the scraper ring thereon to move downward to scrape off the water droplets on the inner wall of the tank body when the water gathered at the bottom of the inner cavity of the tank body is emptied for weighing, so as to effectively prevent the inner wall of the tank body from being damaged by water droplets hanging on the wall, resulting in low data measured by the weighing system. This further improves the accuracy of the water mist nozzle flow rate test by the testing device, which is problematic. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the structure of the present invention; Figure 3 A top view of the structure of the present invention; Figure 4 The structure of the present invention Figure 1 A is an enlarged schematic diagram; Figure 5 The structure of the present invention Figure 1 The enlarged schematic diagram of point B in FIG.

[0015] In the figure: 1-tank body, 2-drainage pipe, 3-end cover, 4-hollow connecting rod, 5-piston, 6-first elastic member, 7-scraper ring, 8-pressure relief device, 9-connecting pipe, 10-guide rod, 11-shaft rod, 12-second elastic member, 13-first through hole, 14-second through hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figure 1 , Figure 2 As shown, a fine water mist nozzle flow test equipment comprises a tank body 1 which can be fixedly mounted on an operating table by bolts, a drainage pipe 2 connected to its inner cavity is fixedly mounted on the bottom end of the tank body 1, and the other end of the drainage pipe 2 is connected to a weighing system, so that the water gathered in the inner cavity of the tank body 1 can be weighed, an end cover 3 is threadedly connected to the top end of the tank body 1, a hollow connecting rod 4 is movably connected inside the end cover 3, and a water mist nozzle to be tested is fixedly mounted on the bottom end of the hollow connecting rod 4, and the top end of the hollow connecting rod 4 is connected to an external water supply system, so that during the test, the water supply system is used to make the water mist nozzle start to operate for a certain time, and the flow rate of the water mist nozzle is calculated by weighing the water gathered in the inner cavity of the tank body 1 within a certain time, a piston 5 is fixedly mounted on the bottom of the outer surface of the hollow connecting rod 4, and a closed chamber can be formed at the bottom of the inner cavity of the tank body 1 under the action of the piston 5, so as to store the water sprayed by the water mist nozzle, and a pressure relief device 8 is fixedly mounted on one side of the top end of the piston 5, as shown in FIG. Figure 4 , Figure 5 As shown, the pressure relief device 8 includes a guide rod 10 fixedly installed inside the piston 5, the bottom end of the guide rod 10 extends to the bottom end of the piston 5, and the top end of the guide rod 10 extends to the top of the end cover 3, the guide rod 10 is movably sleeved with a shaft rod 11, and the shaft rod 11 and the guide rod 10 are transmission-connected via a second elastic member 12 movably sleeved on the outer surface of the shaft rod 11 and set as a constant pressure structure.

[0018] In the present technical solution, a first through hole 13 is provided inside the shaft 11, the bottom end of which extends to the bottom end of the piston 5, and a second through hole 14 is provided at the top of the outer surface of the guide rod 10 and at the top end of the end cover 3, which is arranged perpendicularly to the first through hole 13. The top end of the first through hole 13 and the second through hole 14 are initially staggered from each other. As the amount of water accumulated at the bottom of the inner cavity of the tank body 1 increases, the pressure in the inner cavity increases, forcing the first through hole 13 to move upward and compress the second elastic member 12, so that the first through hole 13 and the second through hole 14 are connected to each other, thereby performing a pressure relief operation on the bottom of the inner cavity of the tank body 1 and reducing the pressure; When the pressure at the bottom of the inner cavity of the tank body 1 gradually decreases, the shaft 11 moves downward under the elastic force of the second elastic member 12, and the connection between the first through hole 13 and the second through hole 14 is cut off again, thereby ensuring that the pressure at the bottom of the inner cavity of the tank body 1 can always be maintained within a relatively constant range, so that the flow testing equipment has a higher accuracy in testing the flow of the water mist nozzle.

[0019] like Figure 1 As shown, in the present technical solution, a plurality of groups of first elastic members 6 arranged in a ring array are provided at the bottom end of the piston 5, and a scraper ring 7 whose outer wall contacts the inner wall of the tank body 1 is fixedly installed at the bottom of the first elastic member 6, and then the scraper ring 7 can be used to scrape the inner wall of the tank body 1, so as to effectively prevent the inner wall of the tank body 1 from being caused by water droplets hanging on the wall, resulting in low data measured by the weighing system, and the problem of poor flow test accuracy of the water mist nozzle; At the same time, the arrangement of the scraper ring 7 can ensure that there is a certain amount of space at the bottom of the inner cavity of the tank body 1 to be filled with air, thereby detecting the internal pressure.

[0020] like Figure 1 , Figure 3 As shown, in the present technical solution, a connecting pipe 9 is provided on the other side of the end cover 3, the bottom end of which extends to the bottom of the first elastic member 6, and the other end of the connecting pipe 9 is connected to the air pressure pump station, so that a certain amount of air can be filled into the bottom of the inner cavity of the tank body 1 to adjust the pressure in the initial state, thereby simulating the operating environment of the water mist nozzle under different pressures.

[0021] like Figure 1 As shown, in the present technical solution, the top end of the shaft rod 11 extends to the top of the guide rod 10, and a locking nut is provided on the top of the guide rod 10 and is threadedly connected to the outer surface of the shaft rod 11. The initial elastic force of the second elastic member 12 can be regulated by adjusting the relative position relationship between the guide rod 10 and the shaft rod 11, and the initial pressure at the bottom of the inner cavity of the tank body 1 can be regulated in cooperation with the connecting pipe 9 to test the flow rate of the water mist nozzle under different pressure environments.

[0022] In the present technical solution, a driving mechanism is provided at the bottom of the end cover 3 which is transmission-connected to the outer surface of the hollow connecting rod 4, so that when the water gathered at the bottom of the inner cavity of the tank body 1 is drained, the driving mechanism is triggered to drive the piston 5 and the scraper ring 7 thereon to move downward to scrape off the water droplets on the inner wall of the tank body 1, and when the scraper ring 7 moves to the lowest position, the driving mechanism is reversely triggered to drive the piston 5 and the scraper ring 7 thereon to return to the initial position.

[0023] In the present technical solution, an electrical feedback connection is formed between the driving mechanism and the connecting tube 9, so that when the driving mechanism is triggered and the piston 5 and the scraper ring 7 are driven to move up and down, the connecting tube 9 is triggered synchronously to inflate or exhaust the bottom of the inner cavity of the tank body 1, thereby balancing the pressure to ensure the smoothness and stability of the piston 5 and the scraper ring 7 during the up and down movement.

[0024] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water mist nozzle flow rate test device, comprising a tank body (1), a drainage pipe (2) connected to the inner cavity of the tank body (1) being fixedly mounted at the bottom end thereof, an end cover (3) being threadedly connected to the top end of the tank body (1), a hollow connecting rod (4) being movably connected inside the end cover (3), and a water mist nozzle to be tested being fixedly mounted at the bottom end of the hollow connecting rod (4), characterized in that: A piston (5) is fixedly mounted on the bottom of the outer surface of the hollow connecting rod (4), and a pressure relief device (8) is fixedly mounted on one side of the top end of the piston (5). The pressure relief device (8) comprises a guide rod (10) fixedly mounted inside the piston (5), the bottom end of the guide rod (10) extending to the bottom end of the piston (5), and the top end of the guide rod (10) extending to the top of the end cover (3). A shaft rod (11) is movably sleeved inside the guide rod (10), and the shaft rod (11) and the guide rod (10) are transmission-connected via a second elastic member (12) movably sleeved on the outer surface of the shaft rod (11), and the relative pressure at the bottom of the inner cavity of the tank body (1) is maintained by the pressure relief device (8).

2. The water mist nozzle flow rate testing device according to claim 1 is characterized in that: The shaft rod (11) is provided with a first through hole (13) whose bottom end extends to the bottom end of the piston (5), and a second through hole (14) is provided at the top of the outer surface of the guide rod (10) and at the top end of the end cover (3) and is arranged perpendicular to the first through hole (13), and the top end of the first through hole (13) and the second through hole (14) are initially staggered.

3. The water mist nozzle flow rate testing device according to claim 2 is characterized in that: A first elastic member (6) is provided at the bottom end of the piston (5), and a scraper ring (7) whose outer wall contacts the inner wall of the tank body (1) is fixedly mounted at the bottom of the first elastic member (6).

4. The water mist nozzle flow rate testing device according to claim 1, characterized in that: The other side of the interior of the end cover (3) is provided with a connecting pipe (9) whose bottom end extends to the bottom of the first elastic member (6), and the other end of the connecting pipe (9) is connected to the air pressure pump station.

5. The water mist nozzle flow rate testing device according to claim 4, characterized in that: The top end of the shaft rod (11) extends to the top of the guide rod (10), and a locking nut is provided on the top of the guide rod (10) and is threadedly connected to the outer surface of the shaft rod (11).

6. The water mist nozzle flow rate testing device according to claim 4, characterized in that: The bottom of the end cover (3) is provided with a driving mechanism that is in transmission connection with the outer surface of the hollow connecting rod (4), so that when the water accumulated at the bottom of the inner cavity of the tank body (1) is emptied, the driving mechanism is triggered to drive the piston (5) and the scraper ring (7) thereon to move downward to scrape off the water droplets on the inner wall of the tank body (1).

7. The water mist nozzle flow rate testing device according to claim 6, characterized in that: An electrical feedback connection is formed between the driving mechanism and the connecting tube (9), so that when the driving mechanism is triggered and the piston (5) and the scraper ring (7) are driven to move up and down, the connecting tube (9) is triggered synchronously to inflate or exhaust the bottom of the inner cavity of the tank body (1).

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