Water removal device for piezometric tube and connecting hose thereof

Abstract

The utility model discloses a water removal device for a piezometric tube and a connecting hose thereof. The water removal device comprises a ventilation head, a ventilation tube and an air pump. The ventilation head is a hollow block made of an elastic flexible material, a connecting pipe is arranged at the hollow part of the upper part of the hollow block and protrudes upwards, the protruding part of the connecting pipe is connected to a ventilation pipe, and the ventilation pipe is connected to an air pump; a groove is formed in the hollow portion of the lower portion of the hollow block of the ventilation head, a positioning ring is arranged in the groove, and the section of the positioning ring is semicircular. A gas-guide tube is arranged on the ventilation tube close to the ventilation head; and a gas valve is arranged on the gas-guide tube. The ventilation head can be sealed and firmly fixed at the upper end of the piezometric tube, residual water in a hose between the bottom of the piezometric tube and an experimental pipeline and the piezometric tube can be removed, and the phenomenon that the pipeline is blocked by internal solids after microorganisms are bred and water is volatilized is avoided; the device is suitable for adding an existing experimental device and can also be designed and installed in combination with a piezometer tube of a new experimental device.

Description

Technical Field

[0001] The invention relates to the field of hydraulic experimental devices, in particular to a water removal device for a pressure measuring tube and a connecting hose thereof. Background Art

[0002] The piezometer is a thin tubular instrument that measures the relative strength of a liquid. The upper end of the piezometer is open to the atmosphere, and the lower end is connected to the side wall of the container (or pipe) to communicate with the liquid being measured. The liquid in the tube rises along the tube to a certain height. It is often used in hydraulic experiments, such as the Reynolds experiment, the Bernoulli equation experiment, the Venturi experiment, the head loss experiment, etc. However, after the experiment, because the hose between the bottom of the piezometer and the experimental pipeline is lower than the experimental pipeline, a large amount of water stays in the hose, which will breed microorganisms for a long time. After the water evaporates, the residual solids inside will clog the pipeline. The piezometer will be blocked in the next experiment and must be cleaned before it can be used again. Cleaning the pipeline is not only time-consuming and laborious, but also improper operation during disassembly can easily damage the experimental pipeline and the connection. Summary of the invention

[0003] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a water removal device that can be used for a pressure measuring tube and a connecting hose thereof.

[0004] In order to solve the above technical problems, the present invention provides a dewatering device for a pressure measuring tube and its connecting hose, comprising a venting head, a venting pipe, and an air pump. The venting head is a hollow block of an elastic flexible material, a connecting pipe is arranged in the hollow part of the upper part of the hollow block, the connecting pipe protrudes upward, the protruding part of the connecting pipe is connected to the venting pipe, and the venting pipe is connected to the air pump.

[0005] A groove is arranged inside the hollow part of the lower part of the hollow block of the ventilation head, and a positioning ring is arranged in the groove, and the cross section of the positioning ring is semicircular.

[0006] The ventilation pipe near the ventilation head is provided with an air guide pipe, and the air guide pipe is provided with an air valve.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: the vent head of the present invention can be sealed and firmly fixed on the upper end of the pressure measuring tube, and can remove the hose between the bottom of the pressure measuring tube and the experimental pipeline and the residual water in the pressure measuring tube, so as to avoid the breeding of microorganisms and the clogging of the pipeline by internal solids after water volatilization; the present invention is suitable for adding to existing experimental equipment, and can also be combined with the pressure measuring tube design and installation of new experimental equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the present invention applied to a hydraulics experimental device.

[0009] Figure 2 It is a structural cross-sectional view of the ventilation head of the present invention placed on the upper end of the pressure measuring tube. DETAILED DESCRIPTION

[0010] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1 and Figure 2 .

[0011] A dewatering device for a pressure measuring tube and its connecting hose comprises a vent head 100, a vent pipe 200, and an air pump 300. The vent head 100 is a hollow block 101 of an elastic flexible material, a hollow portion is provided at the upper part of the hollow block 101, a connecting pipe 102 protrudes upward, a protruding portion of the connecting pipe 102 is connected to the vent pipe 200, and the vent pipe 200 is connected to the air pump 300.

[0012] A groove 104 is arranged inside the hollow portion 103 at the lower part of the hollow block 101 of the ventilation head 100. A positioning ring 105 is arranged inside the groove 104. The cross section of the positioning ring 105 is semicircular.

[0013] An air guide pipe 201 is provided on the ventilation pipe 200 near the ventilation head, and an air valve 202 is provided on the air guide pipe 201 .

[0014] The following is a detailed description of the use of the present invention.

[0015] Taking the use process of the Bernoulli equation experiment in conventional hydraulics experiments as an example, the experimental device includes: an experimental table 401, a stabilizing tank 402, an experimental pipeline 403, a water measuring tank 404, a return pipe 405, a water supply tank 406, etc. The pressure measuring point of the experimental pipeline 403 is connected to the bottom of the pressure measuring tube 408 with a hose 407, and the pressure measuring tube 408 is fixed in a row on a positioning plate 409.

[0016] The positioning ring 105 is put on and adhered to the upper end of the pressure measuring tube 408, and the upper end of the pressure measuring tube 408 is inserted into the hollow part 103 at the lower part of the hollow block 101. The hollow block 101 is made of flexible material. After the pressure measuring tube 408 is inserted, the hollow part 103 can become larger, which is convenient for the insertion of the pressure measuring tube 408, and the outer wall of the pressure measuring tube 408 is in close contact with the hollow part 103. The positioning ring 105 is stuck in the groove 104, and the positioning ring 105 is in close contact with the inner wall of the groove 104, further preventing the ventilation head 100 from leaking. At the same time, when the air pressure in the pressure measuring tube 408 is too high, the positioning ring 105 can further prevent the ventilation head 100 from falling off the pressure measuring tube 408.

[0017] After the experiment is over, the water in the steady water tank 402, the experimental pipeline 403 and the pressure measuring tube 408 is discharged through the experimental pipeline 403, while the experimental water remains in the part of the hose 407 at the lower part of the experimental pipeline 403. The air valve 202 on the air guide tube 201 is closed, and the air pump 300 is turned on, and the air flow enters the vent pipe 200, and then enters the vent heads 100 on each pressure measuring tube 408, enters the upper end of the pressure measuring tube 408 through the connecting tube 102, and then enters the pressure measuring tube 408, so that a certain air pressure is formed in the pressure measuring tube 408. Under the action of the air pressure, the remaining experimental water is pushed back into the experimental pipeline 403 and discharged from the experimental pipeline 403. The water film on the inner wall of the pressure measuring tube 408 and the hose 407 will also evaporate under the action of the air flow, thereby achieving the purpose of drying the inside of the pressure measuring tube 408 and the connecting hose 407.

[0018] Subsequently, the air pump 300 is turned off and the air valve 202 on the air guide tube 201 is opened. In this way, during the experiment, the pressure measuring tube 408 can be quickly connected to the atmosphere, reducing the mutual influence of the pressure changes in each pressure measuring tube 408, and at the same time speeding up the movement of the liquid level in each pressure measuring tube 408 and quickly stabilizing it in preparation for the next experiment.

[0019] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water removal device for a pressure measuring tube and its connecting hose, characterized in that: It includes a ventilation head, a ventilation pipe, and an air pump. The ventilation head is a hollow block made of elastic flexible material. A connecting pipe is arranged in the upper hollow part of the hollow block. The connecting pipe protrudes upward. The protruding part of the connecting pipe is connected to the ventilation pipe, and the ventilation pipe is connected to the air pump.

2. A water removal device for a pressure measuring tube and its connecting hose according to claim 1, characterized in that: A groove is arranged inside the hollow part at the lower part of the hollow block of the ventilation head, and a positioning ring is arranged in the groove, and the cross section of the positioning ring is semicircular.

3. A water removal device for a pressure measuring tube and its connecting hose according to claim 1, characterized in that: An air guide tube is arranged on the ventilation tube near the ventilation head, and an air valve is arranged on the air guide tube.

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