RU2992U1 - PUMP - Google Patents

Description

FIELD OF TECHNOLOGY

The inventive utility model relates to equipment for pumping liquid and viscous-flowing media and relates to pumps.

BACKGROUND

A well-known design of a pump with a pneumatic drive (MS Semidubersky. Pumps, compressors, fans. M. Higher School, 1974. P. 124, Fig. 105) containing a housing, a rod, a return spring check valves, and the housing is made with an air cavity for Mnemvmoda direct stroke, and a return spring is installed between the rod and the pump housing. In this design, the rod moves to one side by the force of compressed air supplied to the pump air cavity, and to move the rod in the opposite direction, the pump air cavity communicates with the atmosphere and the pump return spring comes into operation.

A disadvantage of a pump of this design is that it cannot operate when the supply of the drive medium (compressed air) is turned off. At the same time, the operation of the air pump without compressed air is necessary, for example, in case of emergency emptying of the transport pipes after a compressor that feeds the pump air, or with very rare use in short-term operation when it is not practical to turn on the compressor.

SUMMARY OF THE INVENTION

This utility model is based on the task of creating

such a design of the pump, which could temporarily in standby mode ensure its operationVfi supplying the working medium of the drive (compressed

air). Changes that may be made to the design of the pump should not impair its performance when operating from compressed air (tightness of the housing, durability of the seals, etc.).

The solution to this problem is achieved by the fact that the pump contains a housing, a stem, a return spring, check valves, and the housing is made with an air cavity for pneumatic direct stroke, and the return spring is installed between the stem and the housing, according to a utility model, it is additionally equipped with a backup manual drive containing handle and glove valve, and the handle

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PUMP

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mounted on the pump housing, and the transfer valve is made in the form of a nail with an O-ring under the cap, the cap located in the air cavity of the pump between its body and the stem aligned with this stem, and the valve stem is connected by direct contact with the handle through an opening in the housing, made from the condition :

FROM

Oh - p

where S is the area of the hole;

Q is the force acting on the pump stem from the weight of the elements

manual actuator (valve and handle); P is the working air pressure in the pump.

The introduction of these differences will allow you to create a pump with pneumatic and manual drive. A manual drive can temporarily in standby ensure the pump runs without compressed air. The special design of the transfer valve with an O-ring, as well as the fulfillment of the specified requirements for the parameters of the openings in the pump housing for the valve, ensures normal operation of the pump in pneumatic mode from the point of view of the tightness of the housing and the durability of the seals.

SHORT DESCRIPTION. DRAWINGS

The essence of the utility model is illustrated by the drawings shown in FIG. .

In FIG. 1 shows a diaphragm pump with pneumatic and manual drive in a static position.

In FIG. 2 shows the position of the pump elements when compressed air is supplied to it.

In FIG. 3 shows the position of the pump elements under the action of a manual drive.

In FIG. marked: 1 - pump housing E - flexible diaphragm

3- stock

4- return spring

5- pressure plate

6- intake check valve - exhaust check valve

I,.

BEST OPTION FOR IMPLEMENTING A USEFUL MODEL

According to FIG. 1, the pump comprises a housing 1, inside of which a flexible diaphragm 2 with a rod 3 is mounted, resting on the protrusions of the housing through a return spring and a pressure plate 5. In the housing above the diaphragm there is an air cavity of the pump with a nozzle for supplying compressed air. Under the diaphragm is the pump cavity for the transported medium. Oia & is equipped with check valves 6 and 7. On the upper part of the housing, a hand drive handle 8 is pivotally mounted, which rests on a transfer valve 9, made in the form of a nail with an O-ring 10 under the cap. The hat is located between the end of the stem and the housing coaxially with the stem. The valve stem through the hole in the housing comes out and in contact with the handle of the manual actuator. The area of the hole is greater than the quotient of the force acting on the pump stem from the weight of the valve and the handle on the working air pressure in the pump.

The pump operates as follows.

In the operating mode from the pneumatic atom (see FIG. 2), compressed: air,: enters the air cavity of the pump and, overcoming the resistance of the spring 4, moves | (diaphragm 2 with the stem 3 downward, displacing the transporting medium through the opening exhaust check valve 7 into the discharge In this case, the stem 3, lowering with the diaphragm, moves away from the manual drive gear valve 9. The valve 9 does not fall down, but continues to maintain its original position due to compressed air pressure.

equal to O - hl

K p - O (1)

where P is the air pressure in the cylinder

S is the area of the hole in the pump housing for the valve.

According to the accepted utility model, the hole for the valve is made on the basis of the condition: S). i.e:

S.p: o, (2)

Replacing in the expression (1) the value of SP from formula (2) we obtain: G

This suggests that when the conditions of the utility model (S -) are fulfilled, the pressure force P of the compressed air on the valve will be greater than the weight force of the manual actuator elements and therefore the valve retains its upper position and the seal 9 ensures the air tightness of the pump cavity.

When compressed air is released from the naoos, the diaphragm 2 with the rod 3 under the action of the spring 4 returns to its original position. When the valve 7 is closed and the non-return valve b is opened, suction takes place under the diaphragm of the transported medium. The rod 3 in its upper position abuts against the transfer valve 9.

When the pump is operating from a manual drive (see FIG. 3) by pressing the handle 8, the transfer valve 9, and with it the stem 3 and the diaphragm 2 are moved down, the pump works in the discharge phase. When the handle 8 is released, the valve, the stem and the diaphragm under the action of the spring 4 return to their original position (suction phase). During operation of the manual actuator, the valve stem 9 reciprocates in the opening of the housing. The seal 10 does not work with abrasion, which is guaranteed: g reliable seal of the pump when it is running on compressed air.

The proposed design of the pump has a pneumatic drive (as the main one) and a manual one as a backup), capable of ensuring the operation of the pump without compressed air. At the same time, the tightness of the housing is maintained due to the fulfillment of the condition for the parameters of the hole for the transfer valve stem. The design also ensures the durability of the seal of the indicated hole due to a special choice of the shape and location of this seal, Onyvvoyannrv Ev.viyav kvlvets put on the head of the transfer valve and works only on compression, without being subjected to abrasion due to moving ||| pump elements.

INDUSTRIAL APPLICABILITY

The industrial applicability of the utility model is made at the level of working drawings and prototypes. Tests of the proposed:. Design of the pump in the system of the conveyor device for fecal effluent in an environmentally friendly toilet for passenger cars. Serial development of a utility model is being prepared.

Claims (1)

A pump containing a housing, a stem, a return spring, check valves, the housing is made with an air cavity for pneumatic direct stroke, and a return spring is installed between the stem and the housing, characterized in that it is additionally equipped with a backup drive containing a handle and a transfer valve, the handle is mounted on the pump housing, and the transfer valve is made in the form of a nail with an O-ring under the head, and the head is located in the air plane of the pump between its body and the stem in alignment with this current, and a valve rod connected by direct contact with the handle through a hole in the hull, made of conditions
S> O / P,
where S is the area of the hole;
Q - the force acting on the pump stem from the weight of the elements of the manual drive (valve and handle);
P is the working air pressure in the pump.