JPH0429092Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a water intake valve device for a sleeve type piston pump or plunger pump.

[Conventional technology]

In the case of a conventional sleeve-type pump, as shown in FIG. A cylinder tip f having an outlet e, a discharge valve g formed between the cylinder body d and the cylinder tip f, and a discharge valve g connected to the crankshaft and facing into the cylinder base c and the cylinder body d in an air-water tight manner a reciprocating member h, a plurality of through holes k that communicate the water suction chamber i on the side of the water suction port b and the pressurizing chamber j on the side of the discharge port e, and the water suction chamber i
A sleeve m is fixed to the tip of the reciprocating member h so as to slide against the packing l that partitions the space between the reciprocating member h and the pressurizing chamber j; A water intake valve device has been proposed that includes a water intake valve o that is biased toward the sleeve m.

[The problem that the idea aims to solve]

By the way, since the water suction valve device has a simple disk shape, the liquid that passes through the through hole k of the sleeve m during the suction stroke hits the water suction valve o at right angles.
In addition, the outer periphery of the water intake valve o is also bent at a right angle (indicated by arrow F in the figure), which means that the liquid does not flow smoothly, resulting in a large amount of loss.

[Means to solve the problem]

Here, this invention provides a reciprocating pump having the above-described structure, including a water intake valve having a through hole corresponding to the through hole of the sleeve, and a water intake valve that is superimposed and fixed together with the sleeve on the distal end side of the reciprocating member. and a collar that penetrates the water suction valve and allows the side edge of the water suction valve to engage with a guide groove carved on the outer peripheral surface, and when the water suction valve is opened, the collar is flush with the through hole of the sleeve. The present invention proposes a water intake valve device for a reciprocating pump, which is arranged in a line and takes a position shifted from the through hole of the sleeve when closed.

[Effect]

During liquid feeding, the through hole of the water suction valve takes a position offset from the through hole of the sleeve, and the water suction valve comes into contact with the side edge of the sleeve to close the through hole, and during water suction, the water suction valve rotates as appropriate and closes the sleeve. The through hole of the water suction valve and the through hole of the sleeve are made to face each other as they move away from the water suction valve, and the liquid that has passed through the through hole passes through the through hole of the water suction valve without being deflected and flows into the pressurizing chamber. Water absorption takes place smoothly.

〔Example〕

Next, this invention will be explained in detail with reference to the drawings.

First, in FIG. 1, a water intake port 3 is provided in a cylinder base 2 that is arranged in series with a crankcase 1 that supports a crankshaft, and a cylinder body 4 and a cylinder tip 5 that are connected to this cylinder base 2 are connected to each other. home,
A discharge port 6 is provided at the cylinder tip 5.

A discharge valve 7 is formed between the cylinder body 4 and the cylinder tip 5, and a reciprocating member consisting of a plunger or a piston rod is coupled to the crankshaft and faces the cylinder base 2 and the cylinder body 4 in an air-watertight manner. A sleeve 9 is fixed to the tip of the sleeve 8, and a plurality of through holes 12 are formed in the sleeve 9 to communicate the water suction chamber 10 on the water suction port 3 side and the pressurization chamber 11 on the discharge port 6 side. The sleeves 9 are provided at equal angular intervals on an imaginary circle concentric with the central axis, and the sleeves 9 slide in contact with a gasket 13 that partitions the water absorption chamber 10 and the pressurization chamber 11 to reciprocate in an air- and water-tight manner. There is.

the sleeve 9 from the distal end side of the reciprocating member 8;
The water suction valve 15, which is urged to be seated by a resilient body or spring 14, is provided with a through hole 16 at a position that matches the through hole 12 of the sleeve 9. In practice, it is desirable that the hole 16 has a larger diameter than the through hole 12 (see FIGS. 2a and 2b).

The center hole 1 of the water intake valve 15 is formed in an annular shape.
7 has a protrusion 18 extending inward as shown in FIG.
and a collar 19 into which the water absorption valve 15 is inserted.
The protrusion 1 is inserted into the spiral guide groove 20 provided in the
8, when the water suction valve 15 reciprocates along the collar 19 as the sleeve 9 reciprocates, the water suction valve 15 rotates in the circumferential direction relative to the sleeve 9. Become. Therefore, when the water intake valve 15 is opened, the through hole 12 is opened as shown in FIG.
and the through hole 16 are aligned in a line, and when closed, the
As shown in the figure, by setting the relationship between the through hole 12 and the through hole 16 so that the through hole 16 occupies a position completely shifted from the through hole 12 (that is, does not communicate with it), water absorption is prevented. During the stroke (the reciprocating member 8 moves in the direction shown in FIG. 1), the through hole 12 and the through hole 16
The liquid flows from the water absorption chamber 10 to the sleeve 9.
Go straight through the through hole 12 and pass through the through hole 16,
The water is fed into the pressurizing chamber 11, and during the discharge stroke (the reciprocating member 8 moves in the direction shown in FIG.
Since it is seated on the end of the sleeve 9 and completely sealed in a position completely different from that of the pressurizing chamber 1.
Pressurization of the liquid in 1 is carried out without any problem.

In addition, in practice, if a convex part or a concave part 21 is provided on the surface of the water suction valve 15 on the pressurizing chamber side as shown in FIGS. can be done more quickly, increasing pump efficiency.

[Effect of idea]

According to this invention, as mentioned above, when the water suction valve is opened (that is, during the suction stroke), the through hole of the sleeve and the water suction valve are aligned in line, so the flow of the suction liquid becomes extremely smooth, and the pump This can further improve efficiency.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main parts of a reciprocating pump equipped with the water intake valve device of this invention, Figures 2a and b are diagrams showing two positional relationships between the through hole of the sleeve and the through hole of the water intake valve; 3 is a perspective view showing the water intake valve and the collar in which it is fitted separately; FIG. 4a is a perspective view showing a modified example of the water supply valve; FIG. Figure 4c is a sectional view showing a modification of the fifth example.
The figure is a sectional view showing an example of a conventional sleeve type pump. In the figure, 1... crankcase, 2...
...Cylinder base, 3...Water inlet, 4...Cylinder body, 5...Cylinder tip, 6...Discharge port, 7...Discharge valve, 8...Reciprocating member (plunger or piston rod), 9... Sleeve, 10...Water absorption chamber, 11
...pressurization chamber, 12 ... through hole, 13 ... packing,
14... Bullet body (spring), 15... Water intake valve,
16...Through hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Cylinder base 2 that is arranged in series with the crankcase 1 that supports the crankshaft and has a water intake port 3
, a cylinder body 4, a cylinder tip 5 having a discharge port 6, a discharge valve 7 formed between the cylinder body 4 and the cylinder tip 5, and a cylinder body 4 connected to the crankshaft and connected to the cylinder tip 2 and the cylinder tip 5. A plurality of through holes 12 communicate the reciprocating member 8 that faces into the cylinder body 4 in an air-water-tight manner, the water suction chamber 10 on the water suction port 3 side, and the pressurization chamber 11 on the discharge port 6 side.
a sleeve 9 fixed to the tip of the reciprocating member 8 in order to reciprocate in an air-water tight manner by slidingly contacting the gasket 13 that partitions the water absorption chamber 10 and the pressurizing chamber 11; In a reciprocating pump comprising a water intake valve 15 which is urged from the distal end side of the moving member 8 toward the sleeve 9 by an elastic body 14, a through hole corresponding to the through hole 12 of the sleeve 9 is provided. Water intake valve 1 with 16 holes
5, which is superimposed and fixed together with the sleeve 9 on the tip side of the reciprocating member 8, and which penetrates the water suction valve 15 and engages the side edge of the water suction valve 15 with a guide groove 20 carved on the outer peripheral surface. 19 possible colors
A water suction valve device for a reciprocating pump, characterized in that the water suction valve 15 is aligned with the through hole 12 of the sleeve 9 when opened, and is displaced from the through hole 12 of the sleeve 9 when closed. . (2) A guide groove 20 is formed in a spiral shape on the outer circumferential surface of the collar 19 that is integrally formed with the sleeve 9, and the guide groove 20 is formed inward from the center hole 17 of the water intake valve 15. The water suction valve 15 rotates around the axis of the sleeve 9 as the sleeve 9 reciprocates, and the through hole 12 and the through hole 16 are engaged with each other. A water intake valve device for a reciprocating pump according to claim 1, wherein the circumferential positional relationship between the two is changed. (3) Connect the through hole 16 of the water intake valve 15 to the sleeve 9.
A water intake valve device for a reciprocating pump according to claim 1 or 2, wherein the water intake valve device has a diameter larger than that of the through hole 12 of the utility model registered claim 1 or 2.