JPH01500449A - Submersible positive displacement piston pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Submersible positive displacement piston pump Background of the invention TECHNICAL FIELD This invention relates generally to submersible positive displacement piston pumps, and more particularly, to submersible positive displacement piston pumps. A submersible positive displacement piston with special applicability for dispensing liquids into utilization equipment. Regarding stone pumps.

The use of a pump to meter small amounts of liquid from a conveying drum to a utilization device. is well known. For example, U.S. Patent Application No. 06/5 [ i6.363 (filed on December 28, 1983), liquid powder is added at a certain rate. 2 to 3 liters of chemical substances per day are discharged from the transport drum to the point of use. An air-driven diaphragm pump is described that is adapted to deliver air. use The location may be, for example, a coating hood for coating glass bottles.

The benefits of this pump are not typically found in pumps that use regular ball check valves. A pneumatically operated valve is used to prevent liquid leakage. But this pump Even if the results are good, due to differences in processing tolerances and film quality, e.g. A 20% stroke volume difference exists between separate pneumatically driven diaphragm pumps. It is possible that there is.

To overcome these drawbacks, the present invention and the successor, U.S. Pat. No. 8.1172, No. 3.257.953, No. 4,008,003 and especially U.S. A positive displacement piston pump improved by National Patent No. 4,538,140 is used. It is being

The entire disclosure of U.S. Pat. No. 4,536,140 is incorporated herein by reference. becomes a part of. This latter U.S. patent pump uses tin oxide or other metal oxides. For pumping liquid organometallic compounds used in coating glass bottles with materials. is known to be compatible.

In these pumps, the pumping chamber is located outside the conveying drum and is connected to the fluid inlet. The hose extends into the transport drum. Therefore, the chemicals are removed from the drum. It is pumped into the pumping chamber through the gas. However, U.S. Patent No. 4.5313.140 As mentioned in , one problem with positive displacement piston pumps is that the reciprocating piston Even with the tightest manufacturing tolerances between the piston and the inner cylinder wall, Periodic migration of chemicals from the pumping chamber into the space between the inner wall of the cylinder be. If the chemical is a corrosive substance such as a preparation containing monobutyltin trichloride Even the slightest transfer of liquid chemicals can damage the reciprocating piston and the inside of the cylinder. A metal hydroxy compound will adhere between the wall and the wall. This compound is present in the ambient air It is produced by the reaction between water vapor and chemicals. This is the piston The formation causes it to become stuck in the cylinder, causing equipment failure.

In the aforementioned U.S. Pat. No. 4,536,140, another oil barrier of constant oil pressure is These drawbacks can be overcome by placing the cylinder between the cylinder and the inner wall of the cylinder. That is what is being attempted. However, the use of such barriers significantly degrades the equipment. Make it complicated. Also, depending on the application, seal oil may interfere with pump operation.

Another problem with these pumps is that the small amount of air that enters the pump prevents it from operating properly and increases the pressure. The goal is to reduce the feed speed. More specifically, gases contained in the fluid, e.g. Air, hydrogen, carbon dioxide, etc. are used to control fluid agitation or pressure and temperature during pump operation. is often released into the cylinder as a result of changes in As an example, a fluid consisting of Stirring is achieved through chemical separation into liquid and gas fractions. In response to agitation and/or changes in temperature and pressure, other fluids simply vaporize. It physically changes from liquid form to gaseous form. As a result, bubbles form from the gas These air bubbles are trapped in the pumping head of the cylinder, thereby reduce the metering accuracy of the pump and, if present, completely shut off the flow. Air bubbles are common is trapped between the recess of the piston and the inner wall of the cylinder.

More specifically, if the pump is not operating at full capacity, i.e. the piston is at its maximum If the piston rotates less than the large value, the piston will move between its retracted and extended positions. make a reciprocating motion over a smaller distance between Therefore, the upper end of the recess is remains above the discharge port during the reciprocating movement of the pump. Therefore, the above four parts Air bubbles formed between the inner wall of the cylinder and the inside wall of the cylinder remain during pump operation and interfere with movement. Obviously, the smaller the piston stroke, the more gas By being trapped in the recess, the trapped gas is Increase the volume ratio of the space. In other words, the pump becomes sensitive to gas.

This problem causes pumps operating at less than maximum capacity to reduce their flow rate. Must be changed several times.

In that case, the trapped gas will flow out of the pump and restore its set discharge rate. do. However, changing this ability is time consuming and tedious. For example, bottle coating When pumps are used to pump fluids for Excessive amount of covering material may be used or the bottle may not be covered sufficiently.

The problems caused by this small amount of air entering the pump are discussed in U.S. Patent Application No. 7 49.0[I6 (filing date, June 26, 1985)] The entire disclosure of this US patent application is incorporated herein by reference.

Purpose and outline of the invention Therefore, one object of the present invention is to prevent the piston from sticking in the cylinder. An object of the present invention is to provide a positive displacement piston pump that is designed to provide a positive displacement piston pump.

Another object of the invention is to provide metal hydroxylation between the reciprocating piston and the inner cylinder wall. To provide a positive displacement piston pump that prevents compounds from adhering to the pump. It is in.

Yet another object of the invention is to provide a positive displacement piston pump that eliminates the need for barrier fluids. The objective is to provide a sample.

Yet another object of the invention is to prevent the formation of unwanted air bubbles in the cylinder chamber. An object of the present invention is to provide a positive displacement piston pump which is designed to stop.

According to one aspect of the invention, a liquid submersible comprising an inlet boat and an outlet port cylinder means adapted to be introduced into the inlet port and for directing liquid from the inlet port to the outlet port; rotatably and reciprocably disposed within the cylinder means for pumping; a piston having recesses in alternate fluid communication with the inlet boat and the outlet port; piston means rotatably and reciprocably movable within the cylinder means; a pivot assembly pivotally connected to a drive means for operatively driving the pivot assembly; a body connected to said piston means and said rotation when said piston means is positioned in said liquid; ensuring that the motion assembly and the drive means are positioned so as not to come into contact with the liquid; A pump is provided having extension means for.

According to another aspect of the invention, the working end, the inlet boat, the discharge port and the discharge port with a working chamber defined by an opening and a working end, intended to be submerged in a liquid. and cylinder means adapted to pump liquid from said inlet boat to said discharge port. Rotatable and reciprocatable between a retracted position and an extended position in the cylinder and forming recesses in alternate fluid communication with the inlet boat and the discharge boat. a piston means having a free end; and a piston means in the cylinder means; rotatably connected to a driving means for rotatably and reciprocatingly driving the a pivoting assembly; a pivoting assembly for connecting the piston means and the drive when the piston means is in the extended position; the recess is located completely within the working chamber regardless of the angle between the recess and the means; a means for assuring that the pivot assembly is connected to the piston means, and that the piston hand The pivot assembly and the drive means do not come into contact with the liquid when the stage is positioned in the liquid. and extension means to ensure that the pump is positioned as desired. be done.

The above objects and other objects, features and advantages of the present invention will be described below with reference to the accompanying drawings. It will become clearer with a detailed explanation of.

Brief description of the drawing FIG. 1 is a partial diagram showing a submersible positive displacement piston pump according to an embodiment of the present invention. longitudinal section, FIG. 2 is a plan view of the pump shown in FIG. 1, partially shown by imaginary lines; 3 is a partial cross-sectional view of the piston-cylinder end of the pump of FIG. 1; FIG.

Detailed description of the preferred embodiment Referring to the drawings, first referring to FIG. 1, tin oxide or other gold A liquid organometallic compound used to coat glass bottles with metal oxides. A submersible positive displacement pump according to an embodiment of the invention, suitable for example for pumping Illustrated.

As shown in FIGS. 1 and 3, the pump 10 has a hollow cylinder 12. offsets a closed working end 14 and an opposite end 15 with a bore 16. Ru. A diametrically opposed inlet port and discharge boat 18.20 are provided at the working end 14. They are formed adjacently in the cylinder 12, respectively. The discharge pipe connecting portion 22 is connected to the discharge port. It is fixed to the outside of the cylinder 12 in a relationship surrounding the port 20, and the discharge A coupling 23 for fixing one end of a hose 24 is provided. Therefore, The fluid to be pumped is pumped from the discharge boat 20 toward the discharge hose 24 . Made by A chamber 2B is similarly formed in the cylinder 12 and includes a working end 14 and a boat 18. 20 and communicates with boat 18.20.

Piston 28 is rotatably and reciprocably movable into cylinder 12 via bore 16. It has a free end 30 and a driven end 32. The free end 30 is a flat concave 34, which recess is formed when the piston 28 rotates within the cylinder 12. In turn is in fluid communication with boats 18.20. Therefore, the recess 34 is the boat 18. 2 act as a duct between 0 and 18, 20 to alternately open or close the boats 18, 20 in turn.

The recess 34 cooperates with the portion of the working chamber 26 at the top of the piston 280 to reduce cylinder pressure. A pumping chamber is formed by which fluid is pumped between the boats 18,20.

On the other side of the pump 10 is a drive motor 36 with an output drive shaft 38. The dynamic motor is mounted on the board 40. The electrical cable 42 is hose 44 extends through the motor hose 44 to power the motor. It is connected to the housing of the motor 3B. Collar with small boss 4'& Yoke 4B extends through boss 48 and drive shaft 38 by any suitable means such as a pin. It is keyed to the drive shaft 38 by. The yoke 46 includes a socket 52 There is. A laterally projecting arm or transverse arm 54 is fixed to one end of a shaft 56. A ball bearing 58 is fixed to the other end of the arm 54. baud 58 is received within socket 52 to form a universal ball and socket joint.

Therefore, as the drive shaft 38 rotates, the shaft 56 It rotates and reciprocates in a well known manner as described in the aforementioned US patent.

As can be seen, this ball-and-socket joint device rotates the drive shaft 38 relative to the shaft 56. enable movement. As is well known, the amount of reciprocating movement (and therefore the piston in cylinder 12) 28) changes depending on the angle at which the drive shaft 38 rotates relative to the shaft 5B. . Therefore, the pump stroke changes depending on this angle.

For example, when the drive shaft 38 rotates to the maximum extent relative to the shaft 56, i.e., the pump When operating on a large pump stroke, the piston is in the retracted and extended positions in the cylinder 12. It reciprocates over the maximum distance between the position and the position.

According to the invention, the piston 28 is connected to the shaft 56 by an extension shaft 60. The motor 3C controls both the rotation and reciprocation of the piston 28 in the cylinder 12. do. The piston connector 61 is extended to connect the piston 28 to the extension shaft 60. It is connected to the lower end of the shaft 60. According to this configuration, the cylinder 12 and the piston The cylinder 28 is submerged to the bottom of the liquid 62 in the drum 64 and is connected to the motor 36 and assembly. The relevant members of the drive end of are held external to the drum 84 and the liquid 62.

This offers distinct advantages not reached by conventional techniques. For details , the compound in the cylinder is not exposed to the surrounding air, so the metal hydroxide The problem of carbon compounds forming in the space between the piston and cylinder wall has been overcome. Ru. Therefore, the piston is not stuck in the cylinder. Also, conventional technology These disadvantages in U.S. Pat. No. 4,536,140 are overcome. An oil gap wall as described is not required.

As shown in FIG. 1, the extension shaft 60 is surrounded by a hollow extension tube 66 and the extension shaft 60 is surrounded by a hollow extension tube 66. The tube 66 has a lower end fixed to the upper end 15 of the cylinder 12 in a sealed manner, and It extends outward from the drum 64, and its upper end is fixed to a bracket 68. Board 4 0 is also fixed to the bracket 68. The extension tube 66 has a through hole 70 at its lower end. , are each provided with a through hole 72 at the end extending from the drum 64. this As shown, the discharge hose 24 passes through the lower through hole 70 and the extension pipe 66, and then passes through the upper through hole. 72 and is secured to the outer surface of the extension tube 66 by a lock ring 76 therein. It is connected to a coupling 74.

Further, the extension tube 66 is provided with another set of open lower portions 8 at the lower end, and these openings are It is formed at a position slightly above the connecting portion to the cylinder 12. Therefore, extension Since the tube 66 is sealed to the upper end of the cylinder 12, the drum 64 is free of liquid. (or even if the liquid level is below the level above the cylinder 12). The body still exists where the piston 28 extends outwardly of the cylinder 12.

In this way, a liquid seal is formed at the upper end of the cylinder 12 (replacing the drum 64). Since no air or water vapor can enter the pump (except when The formation of metal hydroxy compounds with the cylinder inner wall is avoided. Therefore, the port There is no need for oil seals that can interfere with pump operation. Also, make sure there is enough oil pressure. No maintenance equipment is required.

As is clear, the open lower 8 is formed at a height sufficient to form the above-mentioned seal, and the door It also makes it possible to drain liquid when replacing the ram.

As shown in FIG. 1, drum 64 has a through hole through which extension tube 66 extends. A hole 80 is provided at the upper end, and the extension tube 66 is secured to the drum 64 at this point. Ru. More specifically, the through hole 80 of the drum 64 has a Bontle thread 82; The bolt cap 84, which has a male thread, engages with the bolt screw 82 and opens the through hole 80. The extension tube 6B is disposed in an encircling relationship to provide a seal. Lot The extension pipe 661 is connected to the extension pipe 661 by bolt 8B directly above the bottle cap 84. ;The lock ring 88 is secured to the bolt directly under the bolt cap 84. It is fixed to the extension tube 66 by a bolt 90.

In this way, the bottle cap 84 is fixed to the extension tube 66, and the extension tube 66 is fixed to the drum 64.

A pipe stopper member 92 is disposed in the upper end of the extension pipe 66 and is connected thereto by a pole 86. It is fixed. Bolt 8B connects lock ring 85 to extension tube 66 as described above. It is also used for fixing. The pipe stop member 92 is designed to allow the extension shaft 60 to pass through. a center hole 94 extending in the axial direction of the first hole, and another hole 94 for passing the discharge hose 24; It has an opening 96 extending in the axial direction.

Also as shown in FIG. 1, bracket plate 98 has a bolt in the upper end of extension tube 66. The bolt 100 is fixed coaxially to the outer surface of the extension tube 66. It is also used to secure the coupling 74. The bracket plate 98 has a drive A dynamic bearing 102 is fixed, and the drive bearing 102 has a shaft 56 inside it. It surrounds the shaft 56 to permit rotation and reciprocating motion.

However, as mentioned above, gases contained in the fluid, such as air, hydrogen, and dioxide, Carbon and other substances are released as a result of agitation of the fluid or changes in pressure and temperature during pump operation. , is often discharged into the pump chamber of cylinder 12. Therefore, the gas released forms air bubbles, which are trapped in the pump chamber of the cylinder 12. This may reduce the metering accuracy of the pump 10, especially if the pump is If the drive shaft 38 is operating at less than its maximum capacity, i.e. If it is rotated about the axis 56 by an angle smaller than . In general, air bubbles are produced by River Fish, the same as mentioned above, the entire disclosure of which is incorporated herein. The piston 28 is trapped between the recess 34 and the inner wall of the cylinder 12.

The aforementioned U.S. patent application attempts to overcome this problem by changing the position of the drive shaft 38 relative to the shaft 56. The cylinder of the piston 28 can be adjusted without changing the piston stroke for any angular displacement. A configuration is provided for shifting the retracted position and the extended position in the door 12. the Therefore, the problem of gas trapping is eliminated by keeping the flow rate constant.

Specifically, as shown in FIG. It is equipped with slots 104 and 106, and these slots accommodate the extension shaft 60 and the piston. extending in the general direction of the centerline 10g extending along the axis of the ton 28; Slots 104 and 106 are located on either side of centerline 108.

The friction plate 110 to which the yoke 46 and the motor 36 are fixed has two pivot pins 1.1. 3, 1.15 (with the n shown by the dashed line in Figure 2, and these pivot bins are fitted into respective slots 104 and 106. Therefore, motor 3 6 (this is done by holding the grip 112 fixed to the board 40 and rotating the motor 36). (achieved by driving), the aforementioned ball-and-socket joint The yoke 4B rotates relative to the shaft 5B. Therefore, the pump stroke changes. Ru.

This pump stroke is determined by the scale 114 and pointer 116 adjacent to the gripper 112. can be measured.

Generally, the distance between the pivot bins l13, 115 during one rotation of the yoke 46 is The center of the ball 58 is approximately equal to the diameter of the circle passing through it.

The aforementioned problems associated with the ingress of air into the working chamber in the cylinder of conventional pumps. can be avoided by the configuration described above.

Although the present invention has been described above with respect to a specific embodiment thereof, the present invention may be described other than this embodiment. I made various changes and implemented it.

As such, the specific configurations described above are merely illustrative and do not limit the invention. There isn't.

Procedural amendment (voluntary) Showa 6 detail August 31st

Claims (14)

[Claims] 1. A system capable of being submerged in liquid, with an inlet port and an outlet port. cylinder means; said cylinder means for pumping liquid from said inlet port to said discharge port; rotatably and reciprocably disposed in the cylinder means and said inlet port and piston means comprising recesses alternately in fluid communication with the discharge port; The piston means is rotatable and reciprocatable within the cylinder means. a pivot assembly pivotally connected to a drive means for driving; said pivoting assembly is coupled to said piston means, said piston means being in said liquid; the pivot assembly and the drive means do not come into contact with the liquid when positioned; and extension means for ensuring that the pump is positioned. 2. The cylinder means has a working end and the other end, and the extension means has a working end and an opposite end. an extension shaft for connecting a motion assembly to said piston means and surrounding said extension shaft; a hollow extension tube, said extension tube having a sealing connection at said other end of said cylinder means. the liquid level is below the other end of the cylinder. said cylinder means so as to maintain a liquid seal at said other end of said cylinder means when lowered; Claim 1, wherein the opening is provided at a distance from the sealing connection. pump. 3. further comprising hose means secured to said discharge port of said cylinder means; The extension tube has an opening at the upper end and an opening at the lower end for passing the hose means through the extension tube. 3. The pump according to claim 2, further comprising an opening at the bottom of the pump. 4. The rotation assembly is connected to the drive means and has a socket therein. an arm connected to said extension shaft and extending generally laterally therefrom; means, a ball socket attached to said arm means and fitted into said socket; 3. A pump according to claim 2, further comprising balls forming a socket arrangement. 5. The liquid is contained in a container with an opening at the upper end, and the extension tube is connected to the container. for securing to a container and extending the extension tube through the opening of the container; 3. A pump according to claim 2, wherein the pump is provided with the following means. 6. 6. A pump according to claim 5, wherein said securing means includes a bondle screw arrangement. 7. a working end, an inlet port, a discharge port, and said discharge port and said working end. cylinder means adapted to be submerged in a liquid and having a working chamber defined therein; and; said cylinder hand configured to pump liquid from said inlet port to said discharge port. rotatably and reciprocably arranged between a retracted position and an extended position in the stage; a free space formed with recesses that are alternately in fluid communication with the inlet port and the outlet port; piston means having an end; said piston hand in said cylinder means; rotatably coupled to a drive means for rotatably and reciprocatably driving the stage; a rotating assembly; said piston means and said drive means when said piston means is in said extended position; ensuring that the recess is completely located within the working chamber regardless of the angle between guarantee measures and; said pivoting assembly is coupled to said piston means, said piston means being in said liquid; the pivot assembly and the drive means do not come into contact with the liquid when positioned; and extension means for ensuring that the pump is positioned. 8. Said guarantee means ensure that said during rotational movement of said drive means relative to said piston means. The driving means is guided so that the recess is completely closed when the piston means is in the extended position. Claim 7 further comprising guide means for ensuring that the actuator is positioned in the working chamber. Pump included. 9. Which of the guide means is a substrate means, the substrate means, and the drive means? or two long, somewhat arcuate slots formed in one extending in the general direction of the centerline of the pump on either side of the centerline and further extending in the front direction of the centerline of the pump; two pin means disposed on either the substrate means or the driving means; , these pin means ensure that the recess is completely closed when the piston is in the extended position. said drive means for said piston means to be located within said piston means; extending in said two slots for guiding said drive means during the rotational movement of said 9. The pump according to claim 8, wherein the pump is elongated. 10. The cylinder means has an end opposite the working end, and the extension means has an end opposite the working end. an extension shaft for connecting said pivot assembly to said piston means; and an extension shaft enclosing said extension shaft. a hollow extension tube surrounding the opposite end of the cylinder means; is connected in sealing relation to said liquid level at said opposite end of said cylinder. maintains a liquid seal at said opposite end of said cylinder means when Claims further comprising an opening spaced a little further apart than the connection in the sealing relationship for the purpose of 7. The pump according to item 7. 11. further comprising hose means secured to the discharge port of the cylinder means; The extension tube has an upper end configured to allow the hose means to pass through the extension tube. 11. The pump according to claim 10, further comprising an opening at the lower end and an opening at the lower end. 12. The pivot assembly is coupled to the drive means and includes a socket therein. yoke means connected to said extension shaft and extending generally laterally therefrom; arm means; a board attached to the arm means and fitted into the socket; 11. A pump according to claim 10, further comprising balls forming a socket arrangement. 13. The liquid is contained in a container with an opening at the upper end, and the extension tube is placed in front of the container. and fixed to the container to extend the extension tube through the opening of the container. 11. The pump according to claim 10, further comprising fixing means. 14. 14. A pump according to claim 13, wherein said securing means includes bondle screw means. .