CN1329668C

CN1329668C - Waterram demonstration instrument

Info

Publication number: CN1329668C
Application number: CNB200310106526XA
Authority: CN
Inventors: 赵振兴; 刘孝洋
Original assignee: Hohai University HHU
Current assignee: Hohai University HHU
Priority date: 2003-12-04
Filing date: 2003-12-04
Publication date: 2007-08-01
Anticipated expiration: 2023-12-04
Also published as: CN1546869A

Abstract

The present invention relates to a continuous type demonstration instrument of a water hammer water raiser, which is composed of a water inlet pipe 1, a supporting rod 2, a valve 3, a water outlet pipe 5, a pressure regulating chamber 6, a top end 7 of a piston, a piston 5 and a cylinder body 9 of the piston, wherein the water inlet pipe 1 is connected with the cylinder body 9 of the piston, and the piston 8 is arranged in the cylinder body 9 of the piston. The top part of the piston 8 is provided with the top end 7 of a piston, the water outlet pipe 5 is connected to one end of the pressure regulating chamber 6, and the other end of the pressure regulating chamber 6 is connected with the water inlet pipe 1. The valve 3 is arranged in the pressure regulating chamber 6, and the water inlet pipe 1 is supported by the supporting rod 2. The present invention has the advantages that the piston is easy to start because the edge shape is smooth so as to reduce resistance force, the reliability of suddenly lifting and lowering is improved, the resistance force is correspondingly little, the period is shortened, and the efficiency is improved. The upper surface of the piston is a conical surface, the opposite pressure of a water body between the upper surface of the piston and the top part of the cylinder body can be used. When a plane surface is in contact with a plane surface, the delaying force of the water body in a gap performs a principal function because of tight combination, the opposite pressure of water vanishes, and the piston does not fall down. The seal between the water inlet pipe and the cylinder body is good. The continuous up-and-down movement does not need additional dynamic force.

Description

The waterram demonstration instrument

Technical field

What the present invention relates to is a kind of continuous type waterram demonstration instrument.Belong to the hydraulics technical field.

Background technique

Piston of the prior art adopts cylinder, and the motion of piston is the power that at random (motion or not sometimes sometimes) moves up and down continuously and will lean on to add.

Summary of the invention

The objective of the invention is to defective, propose piston and adopt the conical surface and cylinder combination, make the randomness of piston motion in the past, become present continuity at above-mentioned existence.Thereby effectively solved piston and started the difficulty that rises, descends in moment.Technical solution of the present invention: its structure is made up of intake pipe, strut, valve, outlet pipe, surge-chamber, piston tip, piston, piston/cylinder, wherein intake pipe and piston/cylinder join, its connecting part forms an elliptical aperture, piston is arranged in the piston/cylinder, piston head has piston tip, and an end of outlet pipe and surge-chamber joins, and the other end and the intake pipe of surge-chamber join, valve is arranged in the surge-chamber, and intake pipe is by they sup-port.Advantage of the present invention: piston easily starts, and this is because edge shape is more smooth and easy to reduce resistance, improves the reliability of sudden rise and fall, and resistance reduces relatively, and the upper and lower cycle of motion shortens, raises the efficiency.Piston upper surface becomes the conical surface, can utilize the backpressure of water body between piston upper surface and the cylinder body top; And when the plane during with plane contact owing to combine closely, the water body viscous force in the slit plays a leading role, the backpressure disappearance of water, piston do not fall down (this is the shortcoming of original piston structure just).The cylinder partial of piston in combination face of the present invention is to make the aperture of intake pipe and cylinder body junction seal better simultaneously.Move up and down continuously and need not additionaling power.

Description of drawings

Accompanying drawing is a structural representation of the present invention

Among the figure 1 is intake pipe, the 2nd, strut, the 3rd, valve, the 4th, the contacting point of intake pipe and piston/cylinder, the 5th, outlet pipe, the 6th, surge-chamber, the 7th, piston tip, the 8th, piston, the 9th, piston/cylinder.

Embodiment

The contrast accompanying drawing, intake pipe 1 joins with piston/cylinder 9, and piston 8 is arranged in the piston/cylinder 9, piston tip 7 is arranged at piston 8 tops, and outlet pipe 5 joins with an end of surge-chamber 6, and the other end of surge-chamber 6 and intake pipe 1 join, valve 3 is arranged in the surge-chamber 6, and intake pipe 1 supports by strut 2.Working procedure:

The current of A, intake pipe 1 rush at piston 8, and rush at piston tip 7 from piston 8 and 9 slits of piston/cylinder, and the piston pulling rod head forms upwards tensile force f ₁Piston 8 is subjected to tensile force f ₁, buoyancy and the current that flow move upward to reaction force, the acting in conjunction of piston 8.If this moment intake pipe 1 with the contacting point water velocity u of piston/cylinder 9 ₁＞o; B, when 9 top moments of piston 8 tops and piston cylinder contact, tensile force f ₁Become o, the rate of climb of piston 8 becomes o, will be converted into an opposition F ₂, the backpressure F that forms of the water body between piston 8 upper surfaces and the cylinder body top ₃, piston 8 deadweight G acting in conjunction startup piston 8, make it to move downward.When piston 8 moves to 4 places, contacting point of intake pipe and piston/cylinder, its water velocity u ₂=o; The water body speed of the contacting point 4 of C, intake pipe and piston/cylinder is by u ₁＞o → water velocity u ₂The kinetic energy u that=o had ²/ 2g can not go out certainly, upwards transmits along intake pipe 1, passes to surge-chamber 6 jack-up valves 3 water and flows in the surge-chamber 6, and make surge-chamber 6 superchargings, and when increasing Δ P → o, valve 3 is closed, and because of the pressure in the surge-chamber 6 increases water is flowed out to outlet pipe 5 tops; D, circulation A → B → C form the continuous motion of lower water by the piston outlet pipe 5 that hoists continually and flow out.

Claims

1, the waterram demonstration instrument, it is characterized in that by intake pipe (1), strut (2), valve (3), outlet pipe (5), surge-chamber (6), piston tip (7), piston (8), piston/cylinder (9) is formed, intake pipe wherein (1) joins with piston/cylinder (9), its connecting part (4) forms an elliptical aperture, piston (8) is arranged in the piston/cylinder (9), piston tip (7) is arranged at piston (8) top, outlet pipe (5) joins with an end of surge-chamber (6), the other end of surge-chamber (6) and intake pipe (1) join, valve (3) is arranged in the surge-chamber (6), piston adopts the conical surface and cylinder combination, the upper surface of piston becomes the conical surface, and the cylinder partial of piston in combination face makes the sealing of eating dishes without rice or wine of intake pipe and cylinder body junction.