UA84716C2 - Back valve of vibration piston pump - Google Patents

Abstract

A back valve of vibration piston pump has axially symmetrical cup-like body (1) that has side wall (2) and bottom section (3) and serves as part of body and chamber of suction of the pump; rigid seat (4) with axial symmetry that has inlet opening (5) for intake of fluid medium; axially symmetrical flexible shutoff element (6) fixed with respect of he body (1) in which part that provides opening/closing inlet openings (5) is made of elastic material. To increase the reliability of vibration piston pumps, flexible shutoff element (6) is arranged as circle-like element and consists of peripheral section (7) that is fixed with respect to еру side wall (2) of the body (1) and elastic section (8) placed near the side wall (2), and the section of the body (1) remote from axis of symmetry serves as seat (4).

Description

facing inside the body (1), has an annular 9. The valve according to item 1 or according to item 8, which differs indentation. by the fact that the sum of the areas of the passage sections of the intake 8. The valve according to item 1, which differs in that it holes (5) in the seat (4) is from 0.3 to 0.95 from has two flexible closing elements (6) and two saddles (4), the area of the elastic part (8) of the flexible closing element - one of which is located in the peripheral part of the element (b) for each pair of "saddle (4) - flexible rear, and the second part of the side wall serves as an indicator element (6)". of the body (1).

The invention relates to the design of the reverse part (directly or through the specified valves for equipping vibrating piston rods) connected to the specified anchor. pumps that are designed for pumping liquid Vibrating piston pumps usually use liquid-based media. they are:

Vibrating piston pumps are products of mass production and use for supplying water from wells or wells. They are simple in the form of detached residential buildings or farm structures and are easy to maintain. donation buildings,

Each such pump | see, for example: OE for watering gardens and allotments on homesteads - 3729938; ER 0288216; BY 209210; 50 642521; 5) ponds and family farms with water taken from free- 737645; 50) 800436; 5) 1788323; You are 2064095; YOU of surface or underground reservoirs, 2066794; VI 2139453; 05 4,047,852; 05 4,169,696; for pumping water-based suspensions,

UMO 94/25753 and many others usually has: oil or oil products from cavities and pits that (1) flowing casing; formed as a result of damage to pipelines (2) as a rule, one rigid axisymmetric dams and tanks, etc. ring-shaped partition, which separates the cavity. In addition, the specified pumps can be divided into two connected parts, namely: state: (2.1) liquid medium suction chamber for pumping wastewater or technological higher from an arbitrary source, and liquids with inclusions of solid particles on (2.2) the injection chamber of the pumped liquid medium in the pressure line; and, less commonly, (3) a non-return valve, which is built into the ca- for pumping drilling fluids or a suction boom and has: trench mud and, sometimes, (3.1) an axisymmetric rigid seat that Zvy- for extracting oil from wells, time It is basically part of the bottom of the suction chamber and has a cheap operation which has ended. at least two inlets, and It is clear that the places of operation of vibrating (3.2) axisymmetric flexible shut-off electric-piston pumps in most cases, the arrangement, which is fixed in the chamber body, is sucked from a distance from manufacturing plants and technical winding points and has an elastic part, which provides re-service. Therefore, consumers are interested in digging/closing their intake holes; productive and trouble-free operation even when (4) an axisymmetric piston, which has placed the pumped liquid medium contains sand in the injection chamber near the specified number or other abrasive particles and/or a characteristic partition and which has at least with such an increased viscosity that the reefal part is made of elastic material that significantly exceeds the viscosity of water. material (in particular, from wear-resistant rubber, etc.) and However, abrasive particles and increased viscosity (5) such a rod for connecting the piston to the piston differently affect the performance and operation of the drive, the geometric axis of which gives practically sympathetic reliability of vibrating piston pumps with the geometric axes of the indicated axes - Yes, abrasive particles of directly contacting parts; parts of pumps and, especially, non-return valves are recommended. sew:

The basis of the drive of such pumps is usually the column, firstly, by selecting at least one electromagnet that is as wear-resistant as possible, the winding of materials and which has the means to connect to the electrome- secondly, by installing a mesh filter on the alternating current circuit, and the anchor is a kinematic connection yaza- entrances to the mentioned suction chamber. with a piston rod. Therefore, the axisymmetric First way is obvious and does not require construc- the piston vibrates with a frequency doubled relative to active improvements. operating frequency, which is set in the corresponding The second way is not very promising in connection with the power grid (ie, respectively, about 100Hz and the following. about 120Hz at operating frequencies of 50Hz in Euro- As is known, the efficiency of filters increases with sion and boG in North America). by reducing the size of the holes in the grid. Unfortunately, this one

In addition, the vibrating piston pump is equipped with a shock absorber, which is one part of the hydraulic suction resistance and the reduction is fixed in the housing, and the other is the productivity of pumping the fluid. Therefore, the use of fine-mesh meshes is permissible if the concentration of abrasive particles in the liquid medium is negligible (as it happens, it is geometrically shaped and convenient to manufacture. in particular, during the periodic selection of the upper. That is why such valves are used in the majority of lighted of a layer of water from a well or borehole - most vibrating piston pumps, which are deep). stupid on the market.

If it is necessary to pump sand-water pul- Unfortunately, in such a valve, the peripheral part, drilling mud, etc., even large-cell ones on the washers of the flexible closing element, the central filter meshes are quickly clogged with sediment and the removable part of which is attached to the seat, thus less frequent cleaning or replacement. reliably closes the intake holes, the more intensive

The viscosity of the pumped fluids and the abrasive wear of the flexible sealing element affect the productivity and operational reliability of the saddle. Further, in such a valve, the total area of the cross sections of the inlet openings is always significantly reduced. less than the area of the elastic part of the flexible closure

Indeed, the volume of portions of the liquid medium of the element that is particularly negatively affected are those that are sucked and pumped, compared to the overall performance of the pump when pumping the viscous volume of the suction and pump chambers of future liquid media. the less, the higher the frequency of piston vibrations in The basis of the invention is the problem of a working pump. Naturally, the higher the viscosity of the change in shape of the flexible sealing element and the mutually pumped fluid medium, the more freezing of the flexible sealing element and energy is spent on overcoming the internal seat to create significantly more productive and friction in it and, of course, the less real it in operation check valve for vibrations - the volume of its portions that are sucked in and pumped out by piston pumps. in each cycle of moving the piston between extreme positions. Therefore, an increase in the viscosity of a conditioned valve for a vibrating piston causes a decrease in pumping performance, which includes: a fluid medium (up to its termination when an axisymmetric cup-shaped body, which is a working drive). has a side wall and a bottom part and serves as part of

The main contribution to the reduction of the operational load of the casing and the suction chamber of the vibration reliability and performance of the vibrating piston piston pump, pumps are made by non-return valves. at least one rigid axisymmetric circuit

In fact, the abrasive wear of their flexible closures, which has at least one inlet for elements and seats, makes it difficult to reliably close the inlet of the fluid medium, and at each movement of the piston towards the chamber, at least one of them is fixed relative to the suction. But even in the absence of an abrasive, an axisymmetric flexible closing element, the effectiveness of closing the inlet openings is at least a part of it during wear, which, of course, is less, the higher the viscosity of the blocking/closing of the inlet openings, is made of a liquid medium. elastic material, flexible according to the invention

Thus, the non-return valves of the vibrating shut-off element is made in the form of ring-supported piston pumps should be a kind of element in itself and consists of a peripheral casing. under the action of abrasive particles and, secondly, to the viscous body and the elastic part, which is located in the bones of the pumped fluid media. near the specified side wall, and serves as a saddle

Unfortunately, according to the available data, this task is still relevant for the part of the specified body far from the axis of symmetry. Yes, the closest one. to the proposed valve, in technical terms, it is known. Such a shape of a flexible closing element and such a non-return valve of a vibrating piston seat placement in any of the following pump See, for example, 5) 1350384 has: separate variants of the design of the non-return valve an axisymmetric cup-shaped body, which allow to significantly increase the ratio of the sum has a side wall and the bottom part and serves as a part of the cross-sections of the inlet openings to the area of the housing and the suction chamber of the vibrating elastic part of the flexible closing element. The piston pump itself manages to increase the productivity and ex- rigid axisymmetric saddle, which serves as the operational reliability of vibrating pistons, the central part of the specified bottom and which has every pump, even when pumping viscous fluids, at least one hole, and preferably several holes - media with impurities abrasive particles. ditch for the fluid inlet (these holes The first additional difference is that they are almost evenly spaced around the circle near that the flexible closing element is made in the form of the axis of symmetry of the specified housing), a flat ring-shaped element, in which the peri- at least one is fixed relative to the corferial part an axisymmetric flexible locking element is directly fixed in the cavity, in the outer side wall of the specified housing, and the elastic part of which at least provides the opening adjacent to the peripheral zone of the bottom excavation/closing of the intake holes, made from the part of this housing that serves saddle and has elastic material. A known flexible closing at least two inlet openings, the locating element has the form of a round washer, the central one at almost equal angular distances, one part of which is attached to the specified bottom, corresponding to the other. by other means (for example, a screw and a nut)

In such a non-return valve, the inlet holes for each movement of the piston of the vibrating pump to the side can be made as wide slots of the suction chamber. vani in a circle near the side wall of the case. The seventh additional difference is that it allows efficient suction of viscous fluids because the non-return valve has two flexible shut-off areas and also effectively closes the intake ports and two saddles, one of which is located in the holes during the passage of the suction portions of the liquid in the reefal part of the bottom, and the second part serves as a part of the medium in the injection chamber of the vibrating side wall of the specified housing. Naturally, that of a tarshenovy pump. which double valve provides suction

The second additional difference is that the fluid medium both from the side of the bottom and along the peri- that the specified case is sectioned and contains: a meter of the side wall of the cup-shaped case. This ring-shaped, height-extending element, the advantage is especially valuable when one of the two ends serves as a side wall, the removable ring-shaped suction unit will be temporarily blocked by a washer that has a radially facing inward (for example, due to the stop of the bottom part of the pump housing a protrusion, and the bottom part (3) is made as if in the soil of the filter zone, or due to the contact of a removable part, part of the side wall of the pump with casing parts - the end of this part facing the specified well or well). washers (9), bounded by a cone-shaped surface. The last additional difference is that in the peripheral zone and the plane in the middle part, the sum of the areas of the cross-sections of the intake ports- the specified plane serves as a saddle (4); the groove in the saddle is usually from 0.3 to 0.95 from the flexible locking element is made in the form of the area of the elastic part of the flexible locking element - a flat ring-shaped element from the periphery - and for each pair "saddle - flexible locking el- with a groove into which is inserted the indicated performance of the device". This allows you to choose the appropriate product, and the ability to pump, taking into account the properties of this washer together with the flexible sealing element of fluid media. the volume is attached to the lower end of the side wall Naturally: the body. that when choosing specific embodiments of the invention

In such a non-return valve, the inlet port has the appearance of an annular gap, which allows differences with the main inventive idea to pump viscous fluid media even more effectively, as this idea is within the limits outlined by the formula of the feedstock with abrasive inclusions. of the invention, can be supplemented and/or clarified with

The third additional difference is that, using the usual knowledge of specialists, and that the elastic part of the flexible locking element described below in the preferred embodiments is made in the form of a cylindrical sleeve, the height of which does not limit the scope of the invention in any way to less than the height of the side wall of the case, and this wall belongs to the inventor. serves as a saddle and is equipped with intake holes. Next, the essence of the invention is explained in detail

This significantly increases the performance of the vibration description of the design and operation of the proposed rotary-piston pump, as it allows you to increase the valve with references to the attached drawings, the total area of the passage sections of the inlet where shown on: holes. Fig. 1 - the simplest non-return valve (according to

The fourth difference, additional to the third, is that the peripheral part of the flexible mud of the injection chamber and the piston of the vibrating sealing element is made in the form of a ring pump, initial position); bny shoulder, which is fixed in the upper part of Fig. 2 - the same as in Fig. 1 (phase "discharge - side wall of the body. suction", when the non-return valve finds

The fifth additional difference is that it is in the "open" position); that the elastic part of the flexible closing element in Fig. 3 is the same as in Fig. 1 (the "moved" phase is made in the form of a ring-shaped in plan and the mushroom part of the fluid medium from the chamber is suction-shaped in the cross section of the cuff, which is drawn into the chamber injection, when the return valve is fixed in the middle part of the side wall of the body and is in the "closed" position); su, Fig. 4 - non-return valve with a sectioned short part of the specified side wall of the housing column, (longitudinal section through the plane of symmetry with the seat, and the part of the injection chamber and piston vibra- intake holes are made in the seat at least in this pump, initial position); two rows and are located on different sides of the clamping zone. element in the form of an elastic cylindrical sleeve

Such a non-return valve is particularly effective with an annular rim (simplified longitudinal when pumping Newtonian fluids with a useful section through the plane of symmetry showing the melting part of at least two-stage vibrating discharge chambers and the piston of a vibrating pump, piston pumps. initial position);

The sixth, additional to the fifth difference is Fig. b - the same as in Fig. 5 (for the "pumping" phase, in that the middle part of the specified cuff is melted - suction), when the non-return valve of the side facing the inside of the body , must be in the "open" position); ring-shaped recess This facilitates bending Fig. 7 - a non-return valve, which has a flexible sealing of the edges of the cuff during the suction of fluid serer element in the form of an elastic ring-shaped in the mouths and their pressing to the inlets in plan and mushroom-shaped in the cross section of the ma-

jets (simplified longitudinal section of the plane This embodiment of the invention is possible (see figures of symmetry showing a part of the injection chamber in Figs. 5 and 6), in which the elastic part 8 of the flexible shut-off ratio piston pump, the initial position of the element 6 has the form of a cylindrical sleeve, the height of ). which is less than the height of side wall 2 of housing 1. Time-

The non-return valve in any embodiment, the recess of this wall 2 serves as a seat 4 and is equipped with an inlet (see figures 1-7) has: pilot holes 5. The peripheral part 7 is an axisymmetric cup-shaped body 1, which has a flexible closing element 6 and means its crip- includes the side wall 2 and the bottom part C and serves lation to the side wall 2 usually serves as the ring- part of the housing and the suction chamber vibra- shaped shoulder of the specified sleeve, fixed in the tion piston pump, the upper part of the side wall 2 of the housing 1. at least one rigid axisymmetric si- Next, a possible embodiment of the invention (see Fig. 7), the bottom 4, which has at least one inlet opening 5 in which the elastic part 8 of the flexible closing ele- for the entrance of the fluid medium, and the ment 6 has the form of a ring-shaped in plan and game - at least one axisymmetric ring-shaped in the cross section of the cuff. Such a flexible locking element 6. by the peripheral part 7 of such a flexible locking

The seat 4 is always the part of the body 1 remote from the axis of the element 6 and the means of its attachment to the wall 2 of symmetry. Radial mushroom-shaped protrusions are usually used,

In most cases, it is expedient that the saddle 4 fixed in the unmarked, especially stepped, has two or more inlet holes 5, and these holes holes in the middle part of the side wall 2 of the housing have the shape of rounded edges (in particular, arc- 1. Part of the side wall 2, that overlaps with theft) slits. cuff holes, serves as a saddle 4 and has at least

The sum of the cross-sectional areas of the two rows of inlet holes 5, which are located along the holes 5 in the saddle 4, usually ranges from 0.3 to 0.95 on different sides of the cuff attachment zone. Preferably, from the area of the elastic part 8 of the flexible closure, so that the middle part of the cuff on the side of the element 6 for each pair of "saddle 4 - flexible inserted into the suction chamber, had an unmarked spring element 6". especially the annular recess.

Any flexible closing element 6 consists of - And, finally, there are possible such not shown especially from the peripheral (as a rule, rigid) part - in the drawings (but understandable to specialists) variants of the tin 7, which is fixed relative to the side wall 2 of the non-return valve structure, having two bodies 1, and an elastic part 8, which is intended for a saddle 4 and two flexible locking elements 6, for example. opening/closing of the inlet openings 5 in the seat 4 and the combination of the first bottom seat 4 and the first located near the side wall 2 or adjacent to it flat ring-shaped flexible closing element 6, which are shown in figures 1-3, with the second seat

Specific embodiments of the invention differ in the scrap 4, which serves as a part of the side wall 2 of the body, mainly by the shape of the flexible locking elements 1, and the second flexible locking element 6, in the 61 position of the saddles 4 in the cup-shaped housings 1, the elastic part 8 of which has the form of a cylindrical check valves. sleeves according to figures 5 and 6; or

Thus, in the simplest non-return valve (see the combination of the first bottom seat 4 and the first figure 1-3), the flexible closing element is made of a flat ring-shaped flexible closing element in the form of a flat ring-shaped element, in ment 6, which are shown in figures 1-3, with the second seat, the peripheral part 7 is directly connected to the chamber 4, which also serves as a part of the side wall 2 fixed in the body, and the elastic part 8 adjoins the body 1, and the second flexible locking element 6, to the peripheral zone of the bottom part of this body whose elastic part 8 has the form of a ring-shaped pus 1, which serves as a saddle 4 and in which the cuff is almost flat in plan and mushroom-shaped in cross-section at equal angular distances from each other, as shown in Fig. 7; or nano at least two inlets 5. a combination of the first saddle 4 and the first flexible

In another embodiment of the invention (see Fig. 4), the body of the locking element 6, which is shown in Fig. 4, is sectioned with the second 1 and contains: a saddle 4 and a second flexible locking element, a ring-shaped element extending in height, b, which are shown or on figures 5 and 6, or on fig.7. which serves as a side wall 2. For a better understanding of the features of the work, a removable ring-shaped washer 9, which has a radial non-return valve according to the invention, on the body 1 facing inwards, the following parts are additionally shown in the working position. of a piston pump, such as: an annular partition 10 with a central body 1 and an opening that separates the suction chamber from the removable bottom part 3 is attached to the lower end of the side wall 2, the peripheral zone of which is the discharge chamber of the vibrating piston pump on the side facing to washer 9, bounded by a cone with a so-shaped surface. rod 11 which is connected to not shown

In this valve, the flexible locking element is a vibration actuator, and has the form of a flat ring-shaped element with a coaxially fixed on the piston rod 11 with a not particularly marked peripheral groove, which 12 with a flexible peripheral part. covers the indicated protrusion of the washer 9. Accordingly, the curved arrows indicate the directions of movement of the roller - such a flexible locking element 6 is attached to the guarded fluid medium, and the straight arrows indicate the lower end of the side wall 2 of the housing 1 together with the direction of reciprocating movements of the washer 9. rod 11 and piston 12.

A non-return valve according to the invention is in operation. The non-return valve is shown in the figures as follows. 5 and 6, works almost the same as described above,

In the initial position (see Fig. 1) the flexible pe- with the differences that - the peripheral part of the piston 12 is adjacent to the ring - in the initial position (see Fig. 5) the lower of the similar partition 10 and overlaps the central part of the cylindrical sleeve, which serves elastic hole in it, separating the suction chamber from the part 8 of the flexible closing element 6 of the non-shearing piston pump from the chamber, compressibly adjoins the seat 4, which serves as a part of it. At the same moment, the elastic part 8 of the flexible side wall 2 of the cup-shaped body 1, and the locking element 6, as a rule, will slightly lift during the movement of the rod 11 upwards (see Fig. b), i.e. above the seat 4, and the inlet holes 5 open in the discharge/suction phase, the lower one is indicated

During the upward movement of the rod 11 (see Fig. 2), the piston part of the cylindrical sleeve bends inside 12 and pushes a portion of the fluid medium into the well of the cup-shaped body 1, opening the intake manifold, not shown here, but the flexible holes 5 in the side wall 2. the peripheral part of the piston 12 remains under pressure. It is not difficult to understand that when the fluid medium in the injection chamber is not shown, especially when the rod 11 moves down, the lower part of the suction cup bends down and remains in contact with the cylindrical sleeve, tightly adhering to the side ring-shaped partition 10 At the same time, in the walls 2 and covering the inlet openings 5, the cup-shaped body 1 creates a rarefaction. 6 in figures 5 and 6. The difference is that the keel from the saddle 4 in the peripheral zone of the bottom part C is planar and mushroom-shaped in the cross-section of the specified housing 1, enters through the inlet holes of the cross-section of the cuff, which serves as an elastic part into this housing 1, which serves as a suction chamber 8 of the flexible closing element 6, is deformed in each pump/suction cycle from the top

During the movement of the rod 11 down (see Fig. 3), the pressure in and the lower side. the suction chamber grows, the elastic part 8 From the given description of the work of individual variants of the flexible closing element 6 is pressed against the non-return valve, it is not difficult to imagine how it worked - the seat 4 and covers the inlet openings 5, and the flexible part is an arbitrary double non-return valve. the peripheral part of the piston 12 under liquid pressure Note. It is clear that the terms "up", the medium in the suction chamber of the pump bends "down", "upper" and "lower" applied above moves up and moves away from the annular transfer of images of the non-return valve to the cross-gates 10, passing a portion of the liquid medium - lenakh and are in no way related to the actual higher in the discharge chamber of the vibrating position of the vibrating piston pump in the piston pump. wells or wells.

Next, the discharge/suction processes are repeated as described above. can be easily made from commercially available

The non-return valve, shown in Fig. 4, works with the materials and used to equip the vibra- in almost the same way as described above, with that reciprocating piston pumps for high performance- changeability, that the suction of the liquid medium and the pumping of arbitrary liquid mediums into the bowl-shaped body 1 occurs through one liquid-based (and, especially, viscous media annular inlet 5 in the peripheral and/or media with abrasive inclusions). zone of the bottom part of the indicated housing 1.

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Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601