JP3385503B2 - Suction valve mechanism of plunger pump - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a suction valve mechanism of a plunger pump used in various industrial plants and other applications.

[0002]

2. Description of the Related Art FIG. 5 is a partially cut-away front view of a conventional general vertical plunger pump. An outline of this vertical plunger pump is shown in FIG. 23 is provided so as to communicate with the plunger chamber 23.
A fluid such as water is sucked into the plunger chamber 23 from the suction valve mechanism 24 provided on one side, and the fluid in the plunger chamber 23 is discharged from the discharge valve mechanism 25 provided on the other side of the plunger chamber 23. There is. The upper end of the plunger 21 is mounted on a plunger mounting member 26, and the plunger mounting member 26 is mounted on the upper ends of the side rods 27, 27 arranged on both sides of the plunger 21 with a required space. The side rods 27, 27 are driven up and down by a crank mechanism (not shown). Reference numeral 28 is a fluid suction pipe communicating with the plunger chamber 23 via a suction valve mechanism 24, and 29 is a fluid discharge pipe communicating with the plunger chamber 23 via a discharge valve mechanism 25.

FIG. 6 is a detailed view of the suction valve mechanism 24, and FIG.
8 is a detailed view of a valve lifter portion that is a constituent member of the intake valve mechanism 24, FIG. 8 is a view showing a holder for holding the valve lifter, reference numeral 30 is a valve seat interposed in a valve seat 31, and 32 is a valve closing valve. Sometimes, the convex lens valve having a through hole 32a in the center for pressing the valve seat 30 against the valve seat 31, 33 is resistant to the urging force of the coil spring 34 when the valve is opened, and the convex lens valve 32 has the valve seat 31. Three valve lifters (another one valve lifter is not shown) that press the outer edge portion 32b of the convex lens type valve 32 away from the reference lens, and the reference numeral 33a is a base end portion 33a of the three valve lifters 33. 3 arms 35 fixed at equal intervals by welding
A holder having a (see FIG. 8), w being its weld.

Reference numeral 36 is a support shaft for supporting the central portion of the holder 35. As shown in FIG. 7, the tip end 36a of the support shaft 36 is inserted into a through hole formed in the central portion of the holder 35, The tip end of the support shaft 36 and the through hole are welded together, and the flange 36b formed on the tip end portion 36a and the back surface of the holder 35 are welded and fixed together. The support shaft 36 is supported by each support member described later so that the holder 35 supported by the support shaft 36 can be pivotally slid in the plunger chamber 23. 37 is the support shaft 36
Is a first support member having a through hole 37a for rotatably and slidably supporting the inside of the plunger chamber 23, and 38 is a support shaft 3 connected to the support shaft 36 outside the plunger chamber 23.
A second support member 39 for rotatably and slidably supporting 6'is provided on the support shaft 36 'slidably connected to the inside of the cylindrical hole 40 on the right side of the second support member 38 in FIG. A fixed movable spring pushing member 41 is a coil spring that is contracted around the support shaft 36 ′ between the movable spring pushing member 39 and the fixed spring pushing member 42. , 36 ',
The holder 35 is pushed by the support shafts 36, 36 'to support the three valve lifters 33 supported by the holder 35.
The outer edge portion 32b of the convex lens valve 32 is pressed by the tip of the. Reference numeral 43 is a return spring that is compressed between the first support member 37 of the support shaft 36 and a spring pressing member 44 fixed to the support shaft 36.

[0005]

In the intake valve mechanism 24 of the vertical type plunger pump as in the prior art, the convex lens valve 32 is moved from the valve seat 31 against the urging force of the coil spring 34. Since the base end portions 33a of the three valve lifters 33 that press the convex lens-shaped valve 32 away from each other are fixed to the three arms 35a of the holder 35 by welding, the welded portions can be removed by long-term use. corrosion,
There was a risk of fatigue and damage. Further, as shown in FIG. 7, the tip surface 33b of the valve lifter 33 is formed as an inclined surface along the inclined surface of the outer peripheral portion of the convex lens type valve 32, so that the tip surface 3 of the valve lifter 33 is formed.
Each time the inclined surface of the outer peripheral portion 32b of the convex lens type valve 32 is pressed by 3b, a stress that opens outward is applied to the three valve lifters 33, and the stress is applied to the base end portion 33a of the valve lifter 33 and the holder 35. Since it is also added to the welded part of the above, corrosion and fatigue of the welded part are accelerated. Further, the tip surface 33b of the valve lifter 33 is formed as an inclined surface along the inclined surface of the outer peripheral portion 32b of the convex lens valve 32, and only the tip surface 33b pushes the outer peripheral portion 32b of the convex lens valve 32. Therefore, there is a possibility that the same tip surface 33b is worn and hastened to be damaged. According to the present invention, the base end portion of the valve lifter is attached to the holder by a means that does not involve welding, and the tip end surface of the valve lifter is formed into a conical surface that contacts the inclined surface of the outer edge portion of the convex lens valve. By doing so, it is intended to eliminate the above-mentioned conventional problems.

[0006]

SUMMARY OF THE INVENTION The present invention, in order to achieve the object, provided in communication with the cylinder 22 the plunger 21 is driven up and down in the plunger chamber 23, the flop <br/> flanger 21 by means of a raising and lowering drive, said plunger chamber
The fluid was sucked into the plunger chamber 23 from the intake valve mechanism 24 provided on one of the 23, constituting the plunger to discharge fluid of the plunger chamber 23 from the discharge valve mechanism 25 provided in the other of the plunger chamber 23 in the pump, the intake valve mechanism 24, the valve interposed valve seat 31 during closing valve Sea
The convex lens type valve 32 having a through hole 32a in the center for pressing the valve 30, and the convex lens type valve 32 so as to separate from the valve seat 31 against the biasing force of the coil spring 34 when the valve is opened. A plurality of valve lifters 10 for pressing the ends with the plurality of valve lifters 10
11 having a circulation part for holding the base end part 10a of the
And a support shaft 12 for supporting the holder 11 in the plunger chamber 23 so as to be rotatable and slidable, and the support shaft 12 provided around the support shaft 12, and the tips 10b of the plurality of valve lifters 10 are provided in the convex lens valve 32. The base end portion 10a of the plurality of valve lifters 10 includes a coil spring 41 that presses the outer edge portion 32b, and the base end portion 10a of the plurality of valve lifters 10 is disposed between the bottom of the recessed hole 11a formed in the holder 11 and the base end 10c of the valve lifter 10. This is a suction valve mechanism of a plunger pump that is configured to be rotatable and slidable with a coil spring 13 interposed and to be held so as not to fall off.

Further, the tip ends 10b of the plurality of valve lifters 10 are formed into a cone having a conical surface 10b 'which abuts the inclined surface of the outer edge portion 32b of the convex lens type valve 32. It is a valve mechanism.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The intake valve mechanism of a vertical plunger pump according to the present invention will be described in detail below with reference to the drawings, with the same members as those of the conventional one. FIG. 1 is a partially longitudinal front view of a valve lifter portion which is a constituent member of a suction valve mechanism of a vertical plunger pump of the present invention, FIG. 2 is a left side view of a holder for mounting the valve lifter, and FIG. 3 is the valve. It is a detailed view which attaches the base end part of a lifter.

The intake valve mechanism 24 of the plunger pump of the present invention will be described with reference to FIG.
4 is a convex lens type valve 32 having a through hole 32a in the center portion for pressing the valve seat 30 interposed valve seat 31 in the closed valve, the convex lens type valve 32 when the valve is opened to the urging force of the coil spring 34 A plurality of valve lifters 10 that press the convex lens-shaped valves 32 at their tips to move away from the valve seat 31; and a holder 11 having a flow portion that holds the base ends 10a of the plurality of valve lifters 10. A support shaft 12 that rotatably and slidably supports the holder 11 in the plunger chamber 23, and the support shaft 12 is provided around the support shaft 12, and the tips 10b of the plurality of valve lifters 10 are attached to the outer edge of the convex lens valve 32. And a base end portion 10a of the plurality of valve lifters 10 is a recessed hole 11a formed in the holder 11.
A coil spring 13 is interposed between the bottom of the valve and the base end 10c of the valve lifter 10, and is rotatable and slidable, and
The retaining ring 14 holds the retaining ring 14 so that it does not fall off. In order to fix the support shaft 12 to the holder 11, as shown in FIG.
2a is press-fitted into a through hole formed in the center of the holder 11, and a screw (not shown) is tightened in a screw hole 11c penetrating the through hole from the outer surface of the holder 11, and the tip 12a of the support shaft 12 is tightened. Is fixed to the holder 11.

As described above, the base end portion 10a of the valve lifter 10 is rotated and rotated with the coil spring 13 interposed between the bottom of the recessed hole 11a formed in the holder 11 and the base end 11b of the valve lifter 10. Since the coil spring 13 absorbs the stress applied to the base end portion 10a of the valve lifter 10 by holding it so as to be slidable and not to fall off, the base end portion of the valve lifter is welded to the holder by the conventional method. The welded parts will not be damaged by corrosion or fatigue as if they were fixed.

Further, the tip ends 10b of the plurality of valve lifters 10 are formed in a cone having a conical surface 10b 'which abuts the inclined surface of the outer edge portion 32b of the convex lens type valve 32, and the valve lifter 10 is provided. Since the holder 11 holding this and the holder 11 rotate arbitrarily, only the same conical surface 10b 'of the tip 10b of the valve lifter 10 does not come into contact with the inclined surface of the outer edge portion 32b of the convex lens type valve 32. Therefore, unlike the conventional case, there is no possibility that the same tip end surface of the valve lifter is worn out and hastened to be damaged.

[0012]

According to the suction valve mechanism of the plunger pump of the present invention, the spring is provided between the bottom of the recessed hole formed in the holder and the base end of the valve lifter, the base end of the valve lifter constituting the suction valve mechanism. Since the spring is used to absorb the stress applied to the base end of this valve lifter, the base end of the conventional valve lifter is welded to the holder. Corroded welds, like those fixed by
It will not be damaged by fatigue, and since the base end of the valve lifter is not fixed to the holder by welding, it is relatively easy to replace the valve lifter with the holder in case of damage. It

The tip of the valve lifter is formed into a cone having a conical surface that abuts the inclined surface of the outer edge of the convex lens valve, and the base end of the valve lifter is a concave hole formed in the holder. Since it is held so as to be rotatable and slidable and does not fall off with a spring interposed therebetween, the conical surface at the tip of the valve lifter arbitrarily rotates to abut the outer edge portion of the convex lens valve, The same conical surface at the tip of the valve lifter will not wear out.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view of a valve lifter portion which is a constituent member of a suction valve mechanism of a plunger pump according to the present invention.

FIG. 2 is a left side view of a holder to which a valve lifter which is a constituent member of the intake valve mechanism of the plunger pump of the present invention is mounted.

FIG. 3 is a detailed view of mounting a base end portion of a valve lifter which is a constituent member of a suction valve mechanism of a plunger pump of the present invention.

FIG. 4 is a perspective view of a valve lifter portion which is a constituent member of the intake valve mechanism of the plunger pump of the present invention.

FIG. 5 is a view showing an outline of a conventional general vertical plunger pump.

FIG. 6 is a view showing a suction valve mechanism of a conventional general vertical plunger pump.

FIG. 7 is a partially longitudinal front view of a valve lifter portion which is a constituent member of a suction valve mechanism of a conventional general vertical plunger pump.

FIG. 8 is a left side view of a holder to which a valve lifter which is a constituent member of a suction valve mechanism of a conventional general vertical plunger pump is mounted.

[Explanation of symbols]

10 Valve Lifter 10a Base End 10b Tip 10b 'Conical Surface 10c Base End 11 Holder 11a Recessed Hole 11c Screw Hole 12 Spindle 13 Coil Spring 14 Retaining Ring 21 Plunger 22 Cylinder 23 Plunger Chamber 24 Suction Valve Mechanism 25 Discharge Valve Mechanism 26 Plunger Mounting Member 27 Side Rod 28 Intake Pipe 29 Discharge Pipe 30 Valve Seat 31 Valve Seat 32 Convex Lens Valve 32a Through Hole 32b Outer Edge 33 Valve Lifter 33a Base End 33b Tip Surface 34 Coil Spring 35 Holder 35a Arm 36 Spindle 36a Tip 36b Collar 37 First support member 37a Through hole 38 Second support member 39 Movable spring pushing member 40 Cylinder hole 41 Coil spring 42 Fixed spring pushing member 43 Return spring 44 Spring pushing member w Welding portion

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F04B 53/10 F16K 15/18

Claims (2)

(57) [Claims] 1. A provided in communication with the cylinder (22) a plunger (21) is driven up and down in the plunger chamber (23), wherein the lifting drive of the plunger (21), said <br/> plunger chamber (23) Suction valve mechanism (2
Sucked fluid to the plunger chamber (23) from 4), the discharge valve mechanism provided in the other of the plunger chamber (23) (25)
In the plunger pump configured to discharge the fluid from the plunger chamber (23) , the suction valve mechanism (24) pushes the valve seat (30) interposed in the valve seat (31) when the valve is closed. /> Convex lens valve having a through hole (32a) in the central portion to be pressed
(32) and the convex lens valve (32) when the valve is opened, the spring (3
4) a plurality of valve lifters (10) for pressing the convex lens type valve (32) at their tips so as to separate from the valve seat (31) against the urging force of 4) , and the plurality of valve lifters (10) Base end (10
a sulfo Ruda to hold the a) (11), a support shaft (12) for supporting rotatably slide in the holder (11) a plunger chamber (23), around the support shaft (12) The convex lens type valve is provided with the tips (10b) of the plurality of valve lifters (10).
The spring (4 ) that presses against the outer edge portion (32b) of (32)
1) and the base end portion (10 ) of the plurality of valve lifters (10).
a) is a recessed hole (11 ) formed in the holder (11).
A plunger pump characterized in that a spring (13) is interposed between the bottom of (a) and the base end (10c ) of the valve lifter (10) so as to be rotatable and slidable and held so as not to fall off. Intake valve mechanism. 2. A tip (10b) of the plurality of valve lifters (10 ) is an outer edge portion of the convex lens type valve (32) .
The intake valve mechanism for a plunger pump according to claim 1, wherein the intake valve mechanism is formed in a cone having a conical surface (10b ') that abuts the inclined surface of (32b) .