JPS588282A - Diaphragm pump - Google Patents

Abstract

PURPOSE:To contrive to enhance the durability of a diaphragm pump, by a construction wherein the pressure inside a fluid accumulating chamber becomes lower than the diacharge pressure of a pump when a diaphragm is moved forwards, and it is increased when the diaphragm is moved backwards, so that the force exerted on the diaphragm is reduced. CONSTITUTION:When a piston 14 is moved forwards and the volume of a main pump chamber 18 is reduced so that the pressure inside the chamber 18 is increased, a shielding member 16 is separated far from a groove part 9a of the diaphragm 9 to increase the volume of the fluid accumulating chamber 17, so that the pressure inside the chamber 17 becomes lower than the pressure inside the main pump chamber 18 and the pressure exerted on the diaphragm 9 becomes lower than the discharge pressure of the pump. When the piston 14 is moved backwards to increase the volume of the main pump chamber 18 so that the pressure therein becomes a negative pressure, the pressure inside the chamber 17 is increased and a weak positive pressure is exerted on the diaphragm 9, so that the groove part 9a of the diaphragm 9 is not reversed even when the pressure in the chamber 18 becomes a negative pressure. Accordingly, damage on the diaphragm 9 becomes less possible and the discharge capacity of the pump is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dial ram pump for pumping fluid such as slurry in liquid.

Conventionally, a non-contact positive displacement WO/Iaftum pump has been used for liquids such as slurry which cannot be pumped by gear pumps, piston pumps, etc. Oag＞As a diaphragm pump, see Figure 6 and Figure 6. As shown in the figure, a nine fluff F-type guia fume pump is known that uses a thick-film fledge-type diaphragm [Co., Ltd.] 1 that can withstand high pressure. Since the thick-film flat type diaphragm 1 is extended by the forward and backward movement of the piston Mll and operated by bending KIjjA, the diaphragm bonding stroke is limited to a small value and the diaphragm bond The ability of the diaphragm to move forward and backward is low (11), and when the forward and backward movement of the diaphragm (A/) is fast, the durability of the diaphragm becomes extremely poor and the quality of the diaphragm pump (1) becomes low. In order to eliminate the drawbacks of the diaphragm pump 1, it is desirable to use a thin film grooved diaphragm to prevent expansion and contraction of the diaphragm, as shown in FIG. 6, and to enable the diaphragm to withstand high-speed cycles. However, in such a 7-diameter pump, when the piston M is moved forward to create positive pressure in the 1st chamber U, the groove 9 of the grooved diaphragm 9 moves in the direction shown by the solid line. (in the opposite direction to the bonding chamber side), and when the piston is moved backward to create negative pressure in the pump chamber n, the groove a of the grooved dial 7 mm 9 is moved in the direction shown by the dotted line (the pump chamber side). As the diaphragm bulges out in the direction (direction), when the piston and the like reciprocate repeatedly, the grooves of the diaphragm alternately reverse and bend, resulting in poor durability.Furthermore, the volume change in the pump chamber decreases, reducing the volume of the diaphragm pump. There was a drawback that efficiency decreased.

Therefore, the present invention is intended to eliminate the above-mentioned drawbacks,
To provide a diaphragm bong 1 which can enhance the durability of the diaphragm bong 1 and greatly improve the performance of the bong 1.

The 0* embodiment of the present application will be described below with reference to the drawings. Reference numeral 1 designates a pump case, in which a pump hole, a suction hole 8 and a discharge hole 4 are respectively formed. Seat 1B, ・a, valve body gb
, .b and valve body receiving pieces S. . . 6. 1 is the suction port F, and . is the discharge port F. 9. The outer periphery of the pump case covers the above pump hole.
The entire circumference of the book Kli is attached to the diaphragm, and in the drawing, the pump case IK is tightened, and the large pump body theory and pump case IIIK are secured by being clamped.
Ru. This diaphragm book has an annular groove a that bulges on the side of the pump body. n is the 9th pump chamber formed by the diaphragm IK in the bon 1 hole K11jlE, and ν is the air hole formed in the pump body mKe. The function is that the piston rod V can be inserted into the sliding hole 1OAK of the pump body IIO, and the pneumatic or hydraulic V
The piston 6M is integrally formed at one end of the piston loft U, and is moved back and forth in the direction of the arrow by an appropriate reciprocating drive source 16, such as a Kufunta mechanism, which is moved by an electric motor during rimming. The flan S/I in the pump chamber n is clamped to the tip Wi by the tightening bolt A') (Im not shown) K, which pinches the center of the above-mentioned main frame, and thereby the ζO connected to the center. mi#i is a shielding member integrally formed with the above-mentioned futsun 5F16, and an annular fluid reservoir *yt is formed between the above-mentioned diaphragm and the main pump iiimt is formed between the pump case l and @. The above-mentioned shielding member is formed so that its outer diameter Di is somewhat smaller than the inner diameter D1 of the pump hole 2 so as to have a gap of a suitable size between the shielding member and the inner surface of the pump turf 1. The size of the gap between the outer peripheral surface of the shielding member door and the inner surface of the pump case 1, that is, the outer diameter Di of the shielding member irises
and the size of the bonding hole 20 11DtO is the fluid reservoir 1l.
When the pressure inside rI is lower than that of the bonder discharge pressure in the main pump chamber during forward movement of the diaphragm and O associated with the reciprocating movement of the piston (Mt), the pressure inside the piston (Mt) is lower than that of the bonder discharge pressure in the main pump chamber, and the pressure inside the piston (Mt) is low.
11 is the main boy f@) l oz pump suction pressure) will be high. 5 is the appropriate value K11ja depending on the fluid am degree to be pumped and the piston M011 return movement mode! It's being done. In addition, the above-mentioned shielding member iris is separate from the flange yli, and was later integrally attached to the flange sFM with a 1#1μ plate, etc.], and the annular iris is attached to the flange yli to restrict the movement in the reciprocating direction. KIII that can be rotated! If the above configuration O is also OK, it is used to pump the fluid and drive the reciprocating drive source I to reciprocate the piston U. By this reciprocating movement of the piston, the central portion of the diaphragm 9 and the flange W are moved forward and backward by a predetermined amount, and positive pressure and negative pressure are alternately generated within the main pump chamber. In other words, when the central part of Meiafutsumu 10 and the intestine are moved backward, the main bone yp@wo
Since the volume increases, a negative pressure is created in the main pump chamber, which causes the suction port 1 to also be sucked in, and the fluid passes through the check valve 2 and flows into the main pump chamber. This platform, discharge hole 4
6 Next, when the diaphragm O center and the 7 run sym move forward, the capacity Il of the main pump am decreases, so the main pump Positive pressure is generated, which closes the check valve in the suction hole 8 and opens the check valve in the discharge hole 4, causing the fluid inside the main pump to be discharged from the outside. It is discharged and supplied to a predetermined location. The fluid is continuously pumped by repeating the above operation. In the case of the above operation, when the piston 1 is moved to the forward end, as shown in FIG. When the screw is moved to the end, as shown in Fig. 3, the shielding member approaches the groove 91 of the meafuhumu and reduces the volume of the fluid reservoir ν, and as the bisFun iris moves back and forth, As a result, the volume of the fluid storage chamber d changes. Therefore, the piston iris is moved forward, and the main pump *ys
When the O pressure inside the main pump chamber decreases and the O pressure inside the main pump chamber increases, the O spring product inside the fluid reservoir IjIW is expanded as described above, so the O pressure inside the fluid reservoir ν increases The pressure inside the main pump chamber 1 also becomes low, and the pressure applied to the diaphragm 77 (pump discharge pressure) is also low.
*Fluid flows into the fluid storage chamber I from the pipe. 9. When the piston M-IIX is over-moved and the main pump r*yao equation expands and the O pressure inside the main pump chamber becomes negative pressure, K is
As described above, the volume of the fluid anν is reduced and the fluid in the fluid reservoir V is discharged from the gap $511 into the main pump chamber 1, so the pressure in the fluid reservoir V is increased and becomes negative pressure. & As a result, a weak positive pressure is applied to the diaphragm 9 (Ktj), the O pressure in the main I pump @XS becomes negative pressure, and the 4th sli! As shown in FIG. 1, the groove e1 of the diaphragm is not inverted. When fluid is pumped by moving the diaphragm 9 back and forth in this way, the diaphragm oozes
In O, where the groove and aO bulge are always mixed in with the okaji meat,
When the diaphragm/O damage decreases, the discharge amount of 6c+1-1 becomes ◆. First, when pumping fluid as described above, there is a gap between the shielding member iris and the inner surface of the pump case 1, so even when pumping slurry etc., there is an O rudder between the shielding member and the pump case 1) Jin will come to prevent OJL students.

1*, pump hole O inner diameter Dl, screw FyM and 7 run y1so outer diameter Dt, piston MO operation stator L
Then, the change amount Ma1 of the main Bon-y"*yso spring product is the fluid reservoir ii!
Volume change amount of IF! ft is approximately expressed by the pump discharge amount M1.

As described above, in the ζO invention, a fluid reservoir is formed between the shielding member and the diaphragm, and when the diaphragm is moved forward, the pressure within the fluid reservoir is 1 lower than the Kd pobon discharge pressure and the diaphragm is moved back. When moved I
Since the force applied to the diaphragm becomes smaller when the suction pressure of the Kti pump increases, when designing a Mayafutum 4-in-1, the thickness of the diaphragm should be made thinner to reduce the operating speed during the diaphragm operation stroke. It is possible to increase the size of the
It has the effect of significantly improving sex.

Furthermore, even if the operating streak and operating speed of the diaphragm can be increased as described above, the force applied to the diaphragm during operation is kept small, so damage to the diaphragm O during operation can be reduced. This will improve the durability of the diaphragm.
It has the effect of extending the life of the diaphragm bonder.

Furthermore, as described above, a fluid reservoir is formed between the diaphragm and the 0@ by the shielding member, and the shielding member is designed to have a gap between it and the inner surface of the pump case. Therefore, when this pump is used, it can be used for pumping fluids such as sludge, etc., which cannot be pumped by general gear pumps, piston pumps, etc., in the same way as conventional diaphragm pumps.

[Brief explanation of the drawing]

The drawings are original! Figure 1 is a vertical sectional view, j% intention, and a partially enlarged view showing the 8th @Hiro operation state.
Figure 4 is a sectional view @1m1Of-N line, Figure 6, Figure .
Figure m7 is a cut-out WiWIA showing a conventional example. 1... Pump case, meeting... end, ■...
・Pump room, Ken... Bisshin, i... Fufun N,
M: Shielding member, 1: Fluid storage chamber, Unusual: Gap. Figure 1 Figure 211 Figure 4 Figure 6 Figure 7 Figure 5m

Claims (1)

[Claims] ・Fix the outer circumference of the diaphragm to the inside of the pump case i1 to form a pump chamber, and place the center part of the diaphragm inside the pump chamber and sandwich it between the flange and the bon 1 outdoor O screw F. The diaphragm bonder K) is designed so that the diaphragm can be moved forward and backward toward the pump chamber by moving the piston forward, and the flange SPK has a gap K1 between it and the inner surface of the pump case. A shielding member loaded with electricity is integrally attached, and the shielding member and the above diaphragm are further connected. A gap is formed and a fluid layer is formed there, and as a result of this flow, the internal O pressure becomes lower than the forward movement of the diaphragm (011 Kd/input discharge pressure), and when the diaphragm moves backward (011 Kd), the internal pressure becomes lower than the inlet pressure. A closing iaphragm pump characterized in that the distance 0ffi between the shielding member and the inner surface of the pump case is set so as to be high.