JP5554241B2 - Fluid pressure feeder - Google Patents

Description

  The present invention relates to a fluid pumping device for pumping fluids such as drinking water, soups, paints, ketchup, mayonnaise and the like.

  In the drawings (FIGS. 5 and 6) of Patent Document 1, a “pulsation valve pump” is described. This pulsating valve pump converts the rotational motion of the drive motor into a reciprocating motion of a piston in the pump body by a cam mechanism, and a first suction hole and a second suction hole provided in the pump body according to the reciprocating motion of the piston. The suction / discharge of fluid (water) is repeated by a total of four check valves respectively provided in the second discharge hole and the first discharge hole. Since this pulsating valve pump rapidly pushes out the fluid with the piston at the time of discharge, the fluid flows out at a pressure higher than that at the time of suction, so that it is suitable for, for example, pumping water to the outlet side. Since the pulsating valve pump described in Patent Document 1 is a single body, it cannot obtain an “aortic synthetic waveform”.

Next, paragraphs 0082 to 0085 and drawings (FIGS. 13 and 14) of Patent Document 2 describe matters in which two pulsating valve pumps are provided in order to obtain an aortic synthetic waveform shown in FIG. Has been. Each pump body of these pulsating valve pumps is provided with a total of four switching valves for opening and closing two suction holes and two discharge holes, respectively. Although this Patent Document 2 has an advantage that an aortic synthetic waveform can be obtained, a plurality of cams, a plurality of control levers, and the like are used to open and close the switching valve, so that the number of parts is large. There are problems such as that the combination is troublesome.
Paragraphs 0070 to 0082 and drawings (FIGS. 5 and 6) of Japanese Patent No. 4084102. Paragraphs 0082 to 0085 and drawings (FIGS. 13 and 14) of Japanese Patent Application Laid-Open No. 2007-92561.

  The intended object of the present invention is to obtain an “aortic synthetic waveform” using two pulsating valve pumps P 1 and P 2 as in Patent Document 2. The second purpose is to reduce the number of parts as much as possible and to facilitate the combination. The third object is that the check valve member can be easily cleaned, replaced, and repaired. The fourth object is that the piston can be reciprocated stably. The fifth object is that it can be easily placed in the loading platform or container of the vehicle.

In the fluid pressure feeding device of the present invention, the two pulsating valve pumps (P1, P2) are mounted on the pump body (21) and the first suction hole (33) and the second suction hole (34) of the pump body, respectively. The inlet cover pipe (37) removably attached to the pump body via the first check valve member (V1) and the second check valve member (V2) , and the second discharge hole of the pump body (35) and an outlet cover pipe removably attached to the pump body via a third check valve member (V3) and a fourth check valve member (V4) mounted in the first discharge hole (36) , respectively. (38) , a piston (26) reciprocating in the pump body, and a piston rod (16) connected to the piston and penetrating through the pump body, and these pulsating valve pumps (P1) , P2) of the pair to each other The outlet cover pipe (38, 38) are integral with each other have converging ends portions of the bifurcated becomes a bottle of one connection pipe for connecting to the intersection shape (4,4) (5) to The piston rods (16, 16) are connected to a pair of driven crank arms (13, 13A) via a pair of sliders (14, 14A) guided by guide means, These driven crank arms (13, 13A) are connected to a crankshaft (10) having a drive crank arm portion (11, 11A) projecting at a predetermined angle in the rotational direction, and the crankshaft (10 If) is rotated by the driving force of the driving motor, with respect to the start position of the piston (26) of one of the pulsating valve pump (P1), the piston (26 of the other pulsating valve pump (P2)) or the different positions Start, fluid pumped from these pulsating valve pumps (P1, P2), characterized in that flow downstream of the connection pipes (5) No arterial.

(A) First, as in Patent Document 2, an “arterial composite waveform” can be obtained. Next, since a crankshaft (rotating shaft) having a pair of left and right drive crank arm portions 11 and 11A (phase-changing portions) rotating at a predetermined angle in the rotation direction is used, two pulsating valves The start positions (origin positions) of the pumps P1 and P2 are different. Therefore, problems such as an increase in the number of parts and troublesome combinations can be solved (solving problems in Patent Document 2).
(B) Since the inlet cover pipe 37 and the outlet cover pipe are detachably attached to the pump body 21, the check valve member can be easily cleaned, replaced, and repaired.
(C) The invention according to claim 2 can stably reciprocate the piston.
(D) According to the invention described in claim 3, the fluid pumping device can be easily placed in the loading platform or container of the vehicle.

1 to 12 are each explanatory views showing the best embodiment of the present invention.
Schematic explanatory drawing from the planar view of the fluid pumping apparatus X. FIG. Explanatory drawing from the perspective of pulsation valve pumps P1 and P2. Explanatory drawing of a principal part (a crankshaft, a driven crank arm). Explanatory drawing of the principal part (guide member, horizontal slider). Explanatory drawing of pulsation valve pump P1 (P2). Sectional drawing which shows an example of the structure of pulsation valve pump P1 (P2) Explanatory drawing which shows an example of a non-return valve member. Schematic explanatory drawing of a check valve. The schematic diagram which shows the opening / closing aspect of a non-return valve. (A) And (b) is simple explanatory drawing to the effect that the start positions of the drive crank arm portions 11 and 11A and the piston 26 are different from each other. (A) and (b) are detailed explanatory drawings showing that the start positions of the drive crank arm portions 11 and 11A and the piston 26 are different from each other. Explanatory drawing of the pressure change (aortic synthetic waveform) of the fluid pumping apparatus X. FIG.

  Hereinafter, the best mode (first embodiment) for carrying out the present invention shown in FIGS. 1 to 12 will be described.

(1) From drive source to first piston rod FIG. 1 is a schematic explanatory view of the fluid pressure feeding device X from a plan view. In FIG. 1, reference numeral 1 denotes a base plate of the fluid pressure feeding device X. The base plate 1 is formed in a long plate shape so that it can be placed, for example, in a vehicle bed or container (not shown). Therefore, the fluid pressure feeding device X of the present invention can be transported via a vehicle or a container.

  With reference to FIG. 1, first, beverages that have entered the pump body (housing) from the inlet through the supply pipes 2 connected to each other on the upper surface of one end portion (upper end portion in the drawing) of the base plate 1. A total of two pulsating valve pumps P1 and P2 for continuously pumping fluids such as water, soups, paint, ketchup, mayonnaise and the like from their respective outlets (discharge ports) are provided on the left and right.

  Since the fluid pressure feeding device X includes a total of two pulsation valve pumps P1 and P2, with respect to the start point (one origin position) of the piston that reciprocates in the pump body 21 of one pulsation valve pump P1. Thus, the start point (the other origin position) of the piston that reciprocates in the pump body 21 of the other pulsating valve pump P2 is different.

  Although there is one drive motor 6 installed at the other end (the lower end in the drawing) of the base plate 1, the driving force of the drive motor 6 is the first piston rod of each of the left and right pulsating valve pumps P1, P2. The left and right crank arms 11 and 11A (or crank pins 12 and 12A) of one crankshaft (rotating shaft) 10 that transmits to 16 and 16A have an angle of 90 degrees (predetermined phase difference) and simultaneously in a predetermined direction. Rotate to.

  The fluid continuously pumped from the plurality of discharge holes of the left and right pulsating valve pumps P1 and P2 passes through a pair of left and right merging end portions 4 and 4 connected to each other, and these merging end portions 4, It flows to one connecting pipe 5 on the downstream side connected to 4. In addition, the fluid pumped from the left and right pulsating valve pumps P1 and P2 is connected to the merging end portions 4 and 4 where the bifurcated portions of the outlet cover pipes 38 and 38 become one in a cross shape. Therefore, the pressure waveform of the fluid pressure feeding device X is a waveform obtained by combining the waveforms of the first pulsation valve pump P1 and the second pulsation valve pump P2 (an arterial composite waveform, FIG. 12). Reference). A specific configuration of the pulsation valve pump P1 (P2) will be described later.

  Next, the drive motor 6 is fixed to the other end of the base plate 1. Thus, 7 is a drive gear fixed to the output shaft of the drive motor 6, 8 is a reduction gear meshing with the drive gear 7, 9 is a plurality of crank bearings disposed on the base plate, and 10 is a reduction gear 8 A crankshaft (hereinafter referred to as a “rotary shaft”), 11 and 11A, which is horizontally mounted on the crank bearing 9 so as to pass through the central portion of the shaft, has a predetermined angle (for example, 90 °) with respect to the rotational shaft 10 in the rotational direction. A pair of left and right drive crank arms (see FIG. 3), 12 and 12A projecting at an angle of (degrees), a pair of left and right crank pins 13 and 11A rotatably provided on the drive crank arms 11 and 11A, 13 , 13A is a pair of left and right driven crank arms with a U-shaped rear end portion appropriately connected to the crankpin, and 14 and 14A are a pair of left and right horizontal sliders appropriately connected to the front end portion of the driven crank arm, 15A A pair of left and right guide members 16 and 16A disposed in the central portion of the base plate 1 so that the flat slider can be guided are U-shaped of the horizontal sliders 14 and 14A penetrating the front end surface of the guide member. It is a pair of left and right first piston rods appropriately connected to the tip portion.

  Although detailed explanation of each member is omitted, the guide grooves 15a of the pair of left and right guide members 15, 15A are shown in FIG. 4 so that the horizontal slider 14 (14A) can be stably guided. As shown, each is formed in an inverted T-shaped cross section. Therefore, the engaging portion 14a of the horizontal slider 14 (14A) guided by the guide groove 15a is formed in an inverted T-shaped cross section corresponding to the shape of the guide groove 15a (linear type).

  In the above configuration, the driving force of the driving motor 6 is transmitted from the driving gear 7 to the reduction gear 8, the crank mechanism (rotating shaft, driving crank arm portion, crank pin, driven crank arm) and the horizontal sliders 14, 14A. It is transmitted to the pair of left and right first piston rods 16, 16A.

(2) Specific Configuration of Pulsating Valve Pump P1 Since the configuration of the pair of left and right pulsating valve pumps P1 and P2 is the same, the specific configuration of one pulsating valve pump P1 will be described here. As shown in FIG. 2, the pair of left and right pulsating valve pumps P1 and P2 are appropriately provided with a supply pipe 2 branched into two branches and a single connection pipe 5 at the left and right junction ends 4 and 4 on the outlet (discharge) side. It is connected to.

  FIG. 6 is a cross-sectional view showing an example of the structure of the pulsating valve pump P1. In FIG. 6, reference numeral 21 denotes a long cylindrical pump body having a cylindrical space. The pump body 21 has a disk-shaped front wall (head portion) 22 having a center hole at the front end and a center hole at the rear end. Each has a disk-shaped rear wall 23. For example, the front wall 22 is integrally formed with the pump main body 21, while the rear wall 23 is detachably fixed to the pump main body 21 via an unnumbered seal member or a plurality of fixing tools.

  Thus, 24 is a long cylindrical tip guide tube that is integrally fitted to the outer wall surface of the front wall 22 of the pump body 21, and this tip guide tube 24 is a second fixed to the tip surface of a piston described later. Supports the tip of the piston rod. On the other hand, 25 is a short cylindrical rear end guide cylinder fixed to the outer wall surface of the rear wall 23 of the pump body 21 via a plurality of unfixed fasteners. 1 piston rod 16 is supported.

  Accordingly, the piston 26 that reciprocates in the pump body 21 is stably supported by the rear end guide tube 25 that supports the first piston rod 16 and the front end guide tube 24 that supports the second piston rod 27. It should be noted that the outer periphery of the piston 26, the numbered center hole of the leading end guide tube 24, the numbered center hole of the rear wall 23, the fitting point of the leading end guide tube 24, the joining point of the trailing end guide tube 25, etc. Packings and seal members are provided at the locations, but details of these matters are omitted.

  Now, with the piston 26 as a reference, the cylindrical space of the pump body 21 is divided into a front pump chamber 31 and a rear pump chamber 32 whose volume is changed by the reciprocating motion of the piston 26. Therefore, a pair of first openings (first openings) respectively communicating with the fluid inlet side (IN) are provided at both ends of the one side corresponding to the longitudinal direction of the peripheral wall of the pump body 21 (both ends on the lower side in the drawing). 1 suction hole) 33 and a second opening (second suction hole) 34 are formed.

  On the other hand, a pair of third openings respectively communicating with the fluid outlet side (OUT) are provided at both ends of the other side corresponding to the longitudinal direction of the peripheral wall of the pump body 21 (upper both ends in the drawing). A (second discharge hole) 35 and a fourth opening 36 (first discharge hole) are formed.

  By the way, in the present embodiment, the fluid inlet side (IN) is connected to the supply pipe 2 described above, and the first check valve member V1 is connected to the first opening 33 and the second opening 34 of the pump body 21. A T-shaped or Y-shaped inlet cover pipe 37 connected through the second check valve member V <b> 2 is integrally mounted on the peripheral wall of the pump body 21.

  The inlet cover pipe 37 is connected to an appropriate location at the downstream end of the supply pipe 2, and both ends 37 a having attachment flange portions of the inlet cover pipe 37 are provided with a fixing tool (not shown) and an unnumbered seal member. Via the mounting flanges of the first check valve member V1 and the second check valve member V2.

  On the other hand, the outlet cover pipe 38 on the outlet side (OUT) is also indirectly attached to the peripheral wall of the pump body 21 in the same manner as the inlet cover pipe 37. That is, V3 is a third check valve member fixed to the attachment portion of the third opening 35, and V4 is a fourth check valve member fixed to the attachment portion of the fourth opening 36. The configuration of the outlet cover pipe 38 is substantially the same as that of the inlet cover pipe 37, the merging end 4 at the center of the outlet cover pipe 38 is connected to the end of one connection pipe 5 in an intersecting manner, and the outlet Both end portions 38a having attachment flange portions of the cover pipe 38 are attached to the attachment flange portions of the third check valve member V3 and the fourth check valve member V4 via a fixing tool (not shown) and an unnumbered seal member. It is fixed integrally.

  Therefore, in this embodiment, the inlet cover pipe 37 and the outlet cover pipe 38 can be removed from the pump main body 21 via a plurality (four in total) of check valve members V1 to V4 so that cleaning can be easily performed. It is attached to. In addition, in this embodiment, when the inlet cover pipe 37 and the outlet cover pipe 38 are attached to the pump main body 21, the front pump chamber 31 and the rear pump chamber 32 of the pump main body 21 have the first to fourth openings 33. , 34, 35, and 36 and the check valves of the first to fourth check valve members V1 to V4, the fluid is in communication with the inlet side (IN) and the outlet side (OUT).

  7 and 8 are examples of check valve members. The first check valve member V1 to the fourth check valve member V4 have the same configuration. Therefore, here, the configuration of the check valve member will be described with reference to the third check valve member V3.

  In FIG. 7, reference numeral 41 denotes a rectangular valve box having both ends in the vertical direction having mounting flanges 41a, 42 denotes an internal flow path of the valve box, and 43 denotes an inner surface of a bottom wall 41b forming the internal flow path. This is a plate-like check valve provided so as to be freely raised and lowered.

  Since the mounting flange portion 41 a is fixed to the mounting flange portion 38 a at one end of the outlet cover pipe 38, the internal flow path 43 of the valve box communicates with an unnumbered flow path of the outlet cover pipe 38. Further, since the bottom wall 41b of the valve box is fitted and fixed to a portion forming the third opening at one end of the pump body 21 through a seal member, a rear pump is opened when the plate check valve 43 is opened. It communicates with the chamber 32. In addition, the internal flow path 42 of the valve box is shielded from the rear pump chamber 32 when the check valve 43 is closed.

  FIG. 8 shows an example of how the plate check valve 43 is attached. As shown in FIG. 8, the base end portion 43 a of the plate-like check valve 43 having an elastic function is fixed via a plurality of fixing tools 45. Therefore, the plate check valve 43 opens and closes from the free end 43b side. The lower surface of the plate check valve 43 is in pressure contact with the ring-shaped packing 44.

(3) Action of Pulsating Valve Pump P1 When the drive motor 6 is activated based on a control signal given by a control unit (not shown), the driving force of the drive motor 6 is transmitted to the first piston rod 16. Therefore, referring to the schematic diagram of FIG. 9, the operation of each check valve 43 of the first check valve member V1 to the fourth check valve member V4 when the piston 26 moves in the direction of arrow A in the drawing. Will be explained.

  Now, when the piston 26 moves in the direction of arrow A through the front and rear guide cylinders 24, 25 that guide the first and second piston rods 16, 27, the volume of the front pump chamber 31 decreases (the front pump chamber). On the other hand, the volume of the rear pump chamber 32 increases (the pressure of the rear pump chamber decreases).

  Therefore, the check valve 43 of the fourth check valve member V4 of the front pump chamber 31 and the check valve 43 of the first check valve member V1 of the rear pump chamber 32 are opened simultaneously by the physical fluid law. Further, the check valve 43 of the second check valve member V2 of the front pump chamber 31 and the check valve 43 of the third check valve member V3 of the rear pump chamber 32 are simultaneously closed. In other words, when the piston 26 moves in the direction of the arrow A, the check valve 43 of the first check valve member V1 of the rear pump chamber 32 opens, so that the fluid flows into the rear pump chamber 32 from the inlet side. Since the check valve 43 of the fourth check valve member V4 of the front pump chamber 31 is also opened, the fluid in the front pump chamber 31 flows to the outlet side.

  On the other hand, when the piston 26 moves in the direction of the arrow B in the figure, the operation mode is reversed, and the volume of the front pump chamber 31 increases (the pressure in the front pump chamber decreases). The volume of the rear pump chamber 32 is reduced (the pressure in the rear pump chamber is increased). Therefore, the opening / closing modes of the first check valve member V1 to the fourth check valve member V4 are reversed. In other words, when the piston 26 moves in the direction of the arrow B, the check valve 43 of the second check valve member V2 of the front pump chamber 31 opens, so that fluid flows into the front pump chamber 31 from the inlet side. Since the check valve 43 of the third check valve member V3 of the rear pump chamber 32 is also opened, the fluid in the rear pump chamber 32 now flows to the outlet side.

  Thus, the pulsating valve pump P1 moves the piston 26 against the fluid (for example, drinking water) in the front pump chamber 31 or the rear pump chamber 32 when the piston 26 reciprocates left and right (up and down in some embodiments). The pressure in the pump body is discharged alternately, and the fluid in the pump body is discharged from the outlet side (OUT) in a pressurized state.

(4) Fluid pressure feeding device X of this embodiment
FIG. 1 shows an example of a fluid pressure feeding device X of the present embodiment. The fluid pressure feeding device X is a long plate-like base plate 1, a guide means for guiding two pulsating valve pumps P 1, P 2, sliders 14, 14 A, and a horizontal shaft 1 mounted on a crank bearing. The rotary shaft 10, the reduction gear 8 provided integrally with the rotary shaft 10, the drive gear 7 meshing with the reduction gear 8, and the drive motor 6 are arranged at a predetermined interval in the longitudinal direction of the base plate 1. It is installed. In addition, the long plate-like base plate 1 is formed in a size and shape that can be placed in a vehicle bed or container (not shown).

  The two pulsating valve pumps P1 and P2 are arranged on the base plate 1, and these pulsating valve pumps P1 and P2 are arranged on the front wall 22 as described with reference to FIG. And a first check valve member V1 and a second check valve that are respectively attached to a first suction hole 33 and a second suction hole 34 formed at both ends of the pump body. An inlet cover pipe 37 that is detachably attached to the pump body via a member V2, and a third reverse hole mounted on each of the second discharge hole 35 and the first discharge hole 36 formed at both ends of the pump body. An outlet cover pipe 38 that is detachably attached to the pump body via a stop valve member V3 and a fourth check valve member V4, a piston 26 that reciprocates in the pump body, and a piston that is connected to the piston, and Penetrate the back wall Each of the outlet cover pipes 38, 38 of the pulsating valve pumps P1, P2 are integrally connected via their merging ends 4, 4, respectively. The piston rods 16 and 16 of the pulsating valve pumps P1 and P2 are connected to driven crank arms 13 and 13A via sliders 14 and 14A respectively guided by guide means, and these driven crank arms 13 and 13A are When the rotary shaft 10 is connected to a rotary shaft 10 having a pair of left and right drive crank arm portions 11 and 11A projecting at an angle of approximately 90 degrees in the rotation direction, and the rotary shaft 10 is rotated by the driving force of the drive motor, The piston 26 of the other pulsation valve pump P2 starts from a different position with respect to the start position of the piston 26 of the other pulsation valve pump P1. The fluid pumped from the pulsating valve pumps P1 and P2 flows to one connecting pipe 5 on the downstream side connected to the merging end portions 4 and 4, and as described above, the one connecting pipe 5 Since the fluid pressure is completely merged, the pressure waveform of the fluid pressure feeding device X is a waveform obtained by combining the waveforms of the first pulsation valve pump P1 and the second pulsation valve pump P2 (an arterial composite waveform, see FIG. 12). That is, the fluid in the connecting pipe 5 flows “aortically”.

(5) Starting point of piston 26 of pulsating valve pumps P1 and P2 FIGS. 10A and 10B, or FIGS. 11A and 11B are driving crank arms of the crankshaft (rotating shaft) 10. Since the parts 11 and 11A (crank pins) have a phase of “90 degrees”, it indicates that the start points of the pistons 26 of the pulsating valve pumps P1 and P2 are different.

  For example, referring to FIG. 11, (a) in FIG. 11 shows the starting point of the piston 26 of the pulsating valve pump P1, while FIG. 11 (b) shows the starting point of the piston 26 in the pulsating valve pump P2.

  As is clear from a comparison between FIGS. 11A and 11B, in this embodiment, the pair of left and right drive crank arm portions 11 and 11A of the crankshaft (rotating shaft) 10 is approximately 90 degrees in the rotational direction. Therefore, the piston 26 of the other pulsating valve pump P2 has a different position (point) from the starting point of the piston 26 of one pulsating valve pump P1 when the drive motor 6 is started. ) For example, the starting point of the piston 26 of the pulsating valve pump P1 is at the rear wall 23 of the pump body, whereas the starting point of the piston 26 of the pulsating valve pump P2 is located at the center of the pump body. In addition, the drive crank arm portion 11 on the pulsation valve pump P1 side is in a substantially horizontal state, whereas the drive crank arm portion 11A of the pulsation valve pump P2 is in a substantially vertical state.

FIGS. 12A and 12B show waveforms W1 and W2 of the pulsating valve pumps P1 (P2) and P2 (P1), respectively. FIG. 12C shows a combined waveform of the waveforms W1 and W2 of the pulsating valve pumps P1 (P2) and P2 (P1).
As is apparent from FIG. 12, the waveforms W1 and W2 of one pulsating valve pump P1 and P1 are dynamic, but the two pulsating valve pumps P1 and P1 are connected to each other. When the operation is started with the start point of the piston 26 of the pulsating valve pump P1 (P2) being delayed, an “arterial composite waveform” as shown in FIG.

  In the example shown in the embodiment of the invention, the outlet cover pipe 38 is formed, for example, in a T shape or a Y shape in plan view, and is sent out from the first discharge hole and the 21st discharge hole to center the fluid. At the merging end 4 of the part. Therefore, as shown in FIG. 1, the fluid in the discharge-side connecting pipe 5 connected to the left and right converging ends 4, 4 of the pulsating valve pumps P1, P2 crosses the outlet side (OUT) in an arterial manner. And flow.

  The check valve 43 constituting the check valve member is a plate-like body having an elastic function in this embodiment, but the shape of the check valve 43 is a design change matter.

  The present invention is mainly used in the pump industry for pumping fluid.

  X ... Fluid pressure feeding device, P1, P2 ... Pulsating valve pump, V1 to V4 ... Check valve member, 1 ... Base plate, 2 ... Supply piping, 4 ... Junction end, 5 ... Connection piping, 6 ... Drive motor, 8 ... Reduction gear, 10 ... Crank shaft (rotary shaft), 11, 11A ... Drive crank arm section, 12, 12A ... Crank pin, 13, 13A ... Driven crank arm, 14, 14A ... Horizontal slider, 15, 15A ... Guide member 16, 16A ... first piston rod, 21 ... pump body, 22 ... front wall (head portion), 23 ... rear wall, 24 ... tip guide tube, 25 ... rear end guide tube, 26 ... piston, 27 ... second Piston rod, 31 ... front pump chamber, 32 ... rear pump chamber, 33 ... first opening (first suction hole), 34 ... second opening (second suction hole), 35 ... third opening (second discharge hole) 36 ... 4th opening (1st discharge hole), 37 ... Mouth cover pipe, 38 ... outlet cover pipe 41 ... valve body, 42 ... internal flow channel, 43 ... check valve, 44 ... packing, 45 ... fastener.

Claims (3)

The two pulsating valve pumps (P1, P2) include a pump main body (21) and first check valve members respectively mounted on the first suction hole (33) and the second suction hole (34) of the pump main body. (V1) and an inlet cover pipe (37) removably attached to the pump body via a second check valve member (V2) , and on the other hand, a second discharge hole (35) and a first discharge hole of the pump body An outlet cover pipe (38) removably attached to the pump body via a third check valve member (V3) and a fourth check valve member (V4) respectively attached to (36) , and the pump body A piston (26) reciprocating in the interior and a piston rod (16) connected to the piston and penetrating the pump body, and the pulsating valve pumps (P1, P2) facing each other. outlet cover piping 38) is integrally connected to one another have converging ends portions of the bifurcated becomes one of (one connection pipe connected to the cross shape 4,4) (5), also , the piston rod (16, 16) are respectively connected to a pair of driven crank arm (13, 13A) via a pair of sliders which are guided by the guide means (14, 14A), further, these driven crank arm ( 13 and 13A) are connected to a crankshaft (10) having a drive crank arm portion (11, 11A) projecting at a predetermined angle in the rotation direction, and the crankshaft (10) is driven by a drive motor. When rotated by the force, the piston (26) relative to the start position of the piston (26) of one of the pulsating valve pump (P1), the other pulsating valve pump (P2) is started from different positions, these pulse Fluid pumped from the valve pump (P1, P2), the fluid pumping device, characterized in that the flow downstream of the connection pipes (5) No arterial. In Claim 1, the 2nd piston rod (27) is provided in the front end surface of piston (26) reciprocatingly moved in the pump main body (21) , and this 2nd piston rod (27) is a pump main body (21 ). ) , And is supported by a tip guide tube (24) provided integrally with the front wall. The guide means for guiding the two pulsating valve pumps (P1, P2) , the sliders (14, 14A) , the crankshaft (10), and the drive motor according to claim 1, are placed in a vehicle bed or container. A fluid pressure feeding device, wherein the fluid pressure feeding device is arranged on a base plate so as to be able to perform.

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