JPS6043191A - Electric well pump - Google Patents

Abstract

PURPOSE:To permit to develope the performance of a pump sufficiently by a method wherein the opening speed of a non-return valve, dividing a water suction pipe and a pipeline, is slowed down upon beginning the operation of the pump to increase a resistance and generate a predetermined vacuum for supplementing air while the resistance of the non-return valve is reduced upon the normal operation of the pump. CONSTITUTION:When a pump begins to operate, water in a cylinder 19 is pressurized and the valve member 8 of a non-return valve 5, dividing the water suction pipe 4 and a pipeline 7, is pushed back, therefore, the valve member 8 is not opened, the downstream side of the member becomes vacuum temporarily by the suction force of the pump, the vacuum is transmitted to an automatic air supplementing device through a vacuum transmitting pipe 16 and air is induced into the supplementing device. After beginning the operation of the pump, the water in the cylinder 19 is pushed out gradually through a bypass flow path 21 as time is elapsed and when the valve member 8 is opened perfectly, the resistance of the non-return valve 5 is reduced, the vacuum in the pipeline 7 is reduced and the suction of the automatic air supplementing device is stopped. Thereafter, the pump is operated under a condition that the valve member 8 is opened perfectly, therefore, the performance of the pump may be developed sufficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field In this invention, a reversal valve is provided on the suction side of a pump that communicates a discharge pipe to a pressure tank, and a pipe line between the inverse ratio valve and the pump is provided. The negative pressure generated is used in an electric well pump that draws air into an automatic air supply device.

(B) Prior art A conventional hydraulic well pump with a pressure tank is equipped with an automatic air supply device to supply air to the pressure tank. Therefore, in the case of a shallow well, the negative pressure will be small and the amount of air replenishment will be small, making it impossible to replenish the necessary amount of air. As a countermeasure to this problem, the check valve on the water suction side is replaced with a fully strong spring, and the check valve's resistance hole is drilled to obtain a specified negative pressure, but the resistance of the check valve increases. The disadvantage is that the pump finish is low F.

(c) Purpose of First 1 In view of the above, this invention increases the resistance of the check valve only during air replenishment to generate a predetermined negative pressure, and reduces the resistance of the check valve except during air replenishment. This is to prevent deterioration in pump performance by making the pump smaller.

(b) Configuration of starting J In this invention, a check valve is provided on the suction side of the pump which communicates the discharge pipe to the pressure tank, and the pipe 1 between the reverse ratio valve and the pump is provided.
11C In an electric well pump in which the generated negative pressure is sucked into F automatic air well #1, a piston part is integrally provided with the valve member of the check valve marked +jQ, and this piston l is connected to the valve by a cylinder. In addition to guiding the member in the opening/closing direction, the cylinder is communicated with the pipeline through an auxiliary check valve, and the auxiliary check valve is provided with a small diameter bypass passage.

(E) In the first example, 111#″r pump, (pump I in 2j)
A discharge pipe that communicates 11 with the pressure tank (3), a water suction pipe with 14), an ENFC check valve on the suction side of the pump I1+, +61i with a well-known diaphragm type air supply system, etc. The negative pressure generated in the pipe line (7) between the stop valve ill and the pump (1) causes the intake check valve (6a) to take in air to fully replenish the pressure tank [31] with room air. ◎ @ In Figure 2, the valve member of the check valve (5) is placed on the valve seat +91 (8) to partition the water suction pipe (4) and the pipe line (1). The valve member +81 is attached with a pulp packing IIQIk:, on the surface adjacent to the valve seat (9), and this pulp packing 1.Iα is pressed against the valve seat (9) by an EEIa spring 1llllK.

This compression spring (Ill i'I) has a weak pressing force and does not increase the resistance of the check valve (5+), so it does not cause the performance of the pump to decrease.
21 includes a piston portion integrally provided with the valve member 181; 13;
1 is a cylinder for sliding the piston part a21, which is integrally molded with the reverse ratio valve case 04) and guides the valve part in its opening/closing direction. The oil seal a6) is a negative pressure transmission pipe that communicates with the automatic '! ) is transmitted to the automatic air supply device (6). (181 is a communication pipe connected to the cylinder (19), and the other end is connected to the ball pulp (20) as an auxiliary reverse ratio valve.
It communicates with the pipe line 171K via ffi.

12114; j A small diameter bypass passage that bypasses the ball valve side.

Next, the operation of the device will be explained. In the device,
When the pump Il+ starts operating, the water suction flow tries to push the valve member (8) open, but the water in the cylinder (I9) is compressed and pushes back the valve member (8).
81 does not open, and the flow direction of this valve member is affected by the suction force of the pump ill, temporarily becoming a negative pressure, and this negative pressure is transmitted to the automatic air supply device (6) via the negative pressure transmission pipe 1161. Ra r
L, this'! I! When the air replenishment device (the material 18 that inhales air into 61) is completely opened, the resistance of the check valve (61) becomes smaller and the negative pressure in the pipe (7) is reduced. Therefore, the intake of automatic room air supply 16) is also stopped. ◎The barley is
Since the pump operates when the valve port I81 is fully opened, the performance of the pump is reduced to a certain extent.
When the operation of l+ is stopped, in the said device.

The valve member 18) is instantly closed by the compression spring (11). When the valve member 181 is closed, the cylinder U
t+9) becomes a negative pressure, and a force for blocking the closing metal acts on the valve member 181, but the ball pulp ff'ol is pushed open and the blocking force is reduced to 7'L, so that the valve member (8)
The automatic air replenishment device 16 is closed at one time.
The 6th port which is drawn into the F pressure tank +31 for the RR of the diaphragm, etc. shows an example of 1 suction, and the same parts as the previous example are numbered 11. , The piston part 021"i has a large cylindrical shape at the dependent point of the 0-ike Inuse yII, which will only be explained about the bag part, and is brought into direct sliding contact with the check valve case Q41.

(f) Effects of the Invention Since the present invention is constructed as described above, when the pump starts operating, the opening speed of the check valve is increased to increase its resistance, and a predetermined negative pressure for air supply is maintained. In addition to reducing the resistance of the check valve in the VC during pump operation, the power efficiency of the pump can be increased. It can be increased.

When the enclosed pump stops, the auxiliary check valve opens and
Water is quickly absorbed into the cylinder n1, so the valve member can be instantly closed.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention. FIG. 2 is a g1 sectional view of the main part of the same embodiment, and FIG. 6 is a longitudinal sectional view of the main part of another embodiment of the invention. Ill...pump, ]2)...discharge pipe, 131-...
・Pressure tank, (51・°°check valve, +61, ・self@ air replenishment device, (7)...pipe line, 18)...valve member, Q21-...piston part, +131- ...Cylinder, 0 special...Cylinder stem, (1!0)--Auxiliary check valve, (21)...Bypass flow path.

Claims (1)

[Claims] 1) A check valve is installed on the suction side of the pump, which communicates the discharge pipe to the pressure tank, and the negative pressure generated in the pipe between the inverse ratio valve and the pump is sucked into the F automatic air supply device. In a well pump, a piston part is integrally provided with the valve member of the check valve, and this piston f5 guides the valve member between opening and closing with a cylinder, and also guides the syringe through the auxiliary check valve. An electric well pump 0 characterized by communicating with a pipe line and having a small-diameter bypass flow path provided in an auxiliary check valve.