SU1353966A1 - Pressure device - Google Patents

Abstract

Invention m. used in lubrication systems and reduces metal consumption. The axial channel of the adjustable stop 4 has two stages 6 and 7, with stage 6 extending into the working chamber 3, and in stage 7 there are placed a shutter 8 and thread 9, forming a retaining valve. A rupture disc 11 is installed between the end face of the anvil and the cap nut 10 and functions as a safety valve. The retaining valve serves to prevent unnecessary losses of the pumped medium at the extreme right position of the plunger 2 and the open suction port 14. 1 sludge. 12 i (Л С oo ate with about 35 0

Description

one

The invention relates to general engineering, in particular to injection devices, mainly for lubrication systems.

The aim of the invention is to reduce metal consumption.

The drawing is a diagram of the proposed device.

The injection device comprises a housing 1, a plunger 2 with a drive; a reciprocating motion (not shown) mounted in the housing 1 coaxially with the plunger 2 with the possibility of contact with it in the working chamber 3, an adjustable stop 4 for limiting the stroke of the plunger 2, having at the end protruding from the housing, a portion of the threaded surface 5, and a through axial stepped channel, the smaller step 6 of which extends into the working chamber 3, and in the step 7 of larger diameter there is a shutter 8 and a spring 9 forming the retaining valve. Between the end of the protruding end of the adjustable stop 4 protruding from the housing 1 and the cap nut 10 mounted on the threaded surface 5 of the stop 4, a rupture disc 11 is placed,

the overlapped calibrated OQ hole of the threaded surface, and

12, made in the cap nut 10, and acting as a safety valve.

Adjustable stop 4 is sealed by an elastic ring 13. The injection device has a suction port 14B wall of the housing 1 and the discharge valve 15.

The device works as follows

During the reciprocating movement of the plunger 2, the volume of the working chamber 3 periodically increases and decreases. When the volume of the working chamber 3 increases, the pumped medium fills it through the suction port 14, and when its volume decreases through the discharge valve 15, it is forced out by the plunger 2 to the consumer. The volumetric flow is controlled by moving the adjustable stop 4. When the pressure of the pumped medium in the working chamber is exceeded

40

45

50

a safety device in a retaining valve, including a spring-loaded valve, and a safety valve with a bursting disc and a cap nut for fastening it, and the membrane is installed with the possibility of blocking the cross-section of the calibrated orifice, in order to reduce the metal capacity, The adjustable stop is provided with a through axial foam channel, a smaller diameter step into the working chamber in a larger diameter stage a spring and a shutter of a retaining valve are installed, the rupture disc is installed between tons There is an adjustable nut protruding from the body of the stop and a nut that is attached to the threads of the surface of this stop, with the relief valve opening in the union nut.

VNIIPI Order 5680/32 Circulation 635 Subscription Proizv.-poly. pr-tie, Uzhgorod, st. Project, 4

539662

3 is above a predetermined level determined by the dimensions of the calibrated orifice 12 in the cap nut 10 and the mechanical strength of the material of the rupture disc 11, the latter is broken and the excess of pumped medium is ejected from the installation, preventing the device from overloading. The retaining valve here serves to prevent unnecessary losses of the pumped medium at the extreme right position of the plunger 2 and the open suction port 14. After replacing the rupture disc 11, the device is again ready for operation.

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Claims (1)

Invention Formula An injection device mainly for lubrication systems comprising a housing, a piston with a reciprocating drive mounted in the housing coaxially with the plunger with a possibility of contact with it in the working chamber an adjustable stop for limiting the stroke of the plunger, having an end protruding from the housing. section of the threaded surface, and a safety device in the form of a retaining valve including a spring-loaded gate and a safety valve having a bursting disc and a cap nut for fastening it, and the membrane is installed with the possibility of blocking the cross section of a calibrated orifice, in order to reduce the metal intensity, the adjustable stop is provided with a through an axial stepped channel, a step of smaller diameter entering the working chamber, a spring and a shutter of a retaining valve are installed in a step of a larger diameter, discontinuous the membrane is installed between the end of the adjustable stop protruding from the body and the cap nut fixed to the threaded surface of this stop, and the calibrated opening of the safety valve is made in the cap nut.