SU909283A1 - Pump - Google Patents

Description

(54) PUMP

one

The invention relates to a pump engineering industry, in particular, to pumps with valve-slot distribution and can be used to supply water from reservoirs with simultaneous drainage that have fallen into the suction line of the pump, open bubble fish.

A pump with a slit-valve distribution is known, which contains a working chamber formed by a cylinder with a lid and a piston placed in the cylinder, pressure and suction lines, and a pressure valve that includes a spring-loaded plate valve equipped with a shank 1.

The known pump cannot be used for pumping the medium in which the open-bubble fish is contained, as fish entering the pump cylinder experience the full pressure developed by the pump, since it can exit the cylinder only through its injection line, which at certain pressure leads to barotrauma to the fish.

The purpose of the invention is to ensure the separation of the open-bubble fish falling into the pumped medium by introducing an artificial leakage to parts of the working stroke.

This goal is achieved by the fact that the pump is equipped with a discharge hydraulic line located above the cylinder cover and communicated with the working chamber through a shut-off valve by a channel made in the shank of the discharge valve installed coaxially with the cylinder.

The shut-off valve is formed by an end surface and a saddle fixed in the wall of the relief hydraulic line.

The height of the discharge valve plate is made equal to the valve stroke.

The drawing shows the pump, a longitudinal section.

15

Claims (3)

The pump contains a working chamber 1 formed by a cylinder 2 with a lid 3 and a piston 4 placed in the cylinder. Porsche 4 is brought into reciprocating motion by means of a pusher 5 interacting with a driving cam 6. Pump has suction 7 and pressure 8 hydrolines and a discharge valve including spring-loaded by means of a spring 9, a disk-shaped closure 10 provided with a shank 11. The pump is provided with an additional discharge line in the form of a nozzle 12 located above the lid 3 of the cylinder 2 and having an opening 13 in the wall, o The flap attached to one lid 3 and the last is provided with a bore 14 for the passage of the taper 11 of the discharge valve, the shank 11 itself is provided with a through axial channel 15d of communication on the part of the discharge cycle, the working chamber 1 with the discharge hydraulic line 12. , passed into the hole 13 of the wall of the nozzle 12 and the saddle 17, fixed in the opposite wall of the nozzle 12. In the cylinder 2 is placed the stopper 18 of the stroke of the discharge valve. The pump works as follows. When the driving cam 6 rotates, the piston 4 is pushed by the pusher 5 in a reciprocating movement, which leads to a periodic increase — suction stroke, and decrease the injection stroke, the volume of the working chamber 1. At the suction stroke, the pumped medium flows through the suction hydraulic line 7 chamber 1. At the pumping stroke, after transferring 1 fluid to the working chamber 1, the fish with the beginning of this stroke moves to the upper part of cylinder 2, where the hydrostatic pressure is less by the weight of the liquid column cylinder, and concentrated in the poppet valve 10 of the discharge valve. With a further increase in pressure in the working chamber 1, the part of the pumped medium and the fish located at the shutter 10, through the axial through channel 15 of the shank I, enter the discharge line 12. As the pressure in the working chamber 1 increases, the discharge valve squeezes the spring 9 moving upwards . At the moment of full compression of the spring 9, the shut-off valve is activated, i.e. the end surface 16 of the shank 11 contacts the seat 17, at the same time the disc valve 10 opens the discharge hydraulic line 8 and the pumped medium from the working chamber 1 is displaced by the piston 4 to the discharge hydraulic line 8. During the piston 4 downwards, the plate valve 10 is lowered onto the stop 18 by the action of the spring 9, shutting off the delivery line 8. When the piston 4 reaches the bottom dead center of its movement, through the suction line 7, Filling the working chamber 1 with the pumped medium. Further cycles are repeated. The use of the proposed pump will allow you to do without fish protection devices that are expensive to manufacture and operate. The invention The pump with a valve-slot distribution, containing a working chamber formed by a cylinder with a lid and a piston placed in the cylinder, pressure and suction lines, and a pressure valve including a spring-loaded disc valve equipped with a shank, characterized in that the pumped medium of open-bubble fish, by introducing artificial leakage to parts of the piston stroke, the pump is equipped with a discharge line located above the cylinder head communicating with the working chamber through the check valve channel formed in the shank of the discharge valve, installed coaxially with the cylinder. 2. Pump according to Claim 1, characterized in that the shut-off valve is formed by the end surface of the shank and the seat fixed in the wall of the relief hydraulic line. 3. Pump according to Claims 1 and 2, characterized in that the height of the pressure valve plate is equal to the valve stroke. Sources of information taken into account during the examination 1. Basta TM M. Volumetric pumps and hydraulic motors of hydraulic systems. M., “Mechanical Engineering, 1974, p. 166, fig. 51.