JPH0710490U - Detachable submersible motor pump equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a detachable submersible motor / pump facility that is optimal for large depth locations. A detachable submersible motor in which a pump device 6 is moved up and down by a lifting means via a guide member 5 to a bend 2 of a pumping pipe 1 installed in a tank T, and a discharge port of the pump device is attached to and detached from the bend. In the pump equipment, at least the check valve 10 is integrated on the discharge side of the pump device, and the downstream end surface of the check valve is made to be the attachment / detachment surface S with respect to the bend, thereby increasing the crimping force to the bend. Detachable submersible motor pump equipment characterized by good check valve maintenance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a detachable submersible motor / pump system, and more particularly to a detachable submersible motor / pump system suitable for high head and large diameter.

[0002]

[Prior art]

 Conventionally, as a detachable submersible motor pump facility, for example, the one shown in FIGS. 2 and 3 has been proposed in Japanese Utility Model Laid-Open No. 63-162995. That is, in the water absorption tank T, a pumping pipe 1 having a bend 2 at the lower end is provided, a guide member 5 such as a wire or a support is installed near the bend 2, and a pump device having a motor and an impeller is provided. 6 is lowered by the chain 9 through the guide member 5, and the engaging portion 8 provided on the discharge port flange 7 of the pump device 6 is attached to the engaging receiving portion 4 provided on the flange portion 3 of the bend 2. While being locked, the pump device 6 and the bend 2 are connected, while the chain 9 is lifted to separate them.

[0003]

[Problems to be solved by the device]

In the detachable submersible motor pump facility, as shown in FIG. 2, the load of the pump device 6 is W ₁ (kg), the center of gravity thereof is G ₁ , and the flange portions 7, 3 of the pump device 6 and the bend 2 are arranged. Suppose that the locking point at is a and the horizontal distance between the point a and the center of gravity G ₁ is L ₁ (m), the crimping moment of M ₁ = (W ₁ × L ₁ ) kgf · m is clockwise. The pump device 6 is crimped to the bend 2. On the other hand, the water pressure (discharging head) acting on the attachment / detachment surface S is H (water column m), the diameter of the attachment / detachment surface S is Dcm, and the distance between the center of the attachment / detachment surface S and the locking point a is L (m). To do. When the pump device 6 is locked to the bend 2 and the motor is driven, a force F for separating the attachment / detachment surface S is generated due to the water pressure. In this case, F = (π / 4) D ² × (H / 10) (kgf). Then, this force F generates a push-open moment M ₁ ′ = F × L with L as the length of the arm with the locking point a as the center. This moment M ₁ 'is said crimping moment M ₁ in the reverse direction, M _1' removable surface S if the> M ₁ is separated.

Conventionally, since the discharge head H of a submersible motor pump is small and the diameter D is also relatively small, M₁> M₁Since ′ is established, the crimping on the attachment / detachment surface S is reliably performed, and the pump is operated stably. However, in recent years, when the water absorption tank T has become deeper and the discharge head has been more than twice as large as that of the conventional one, for example, 50 m or more, and the caliber has been increased accordingly, M ₁ ′ ＞ M₁Therefore, the attachment / detachment surface S is opened, a large amount of water is leaked, and it becomes impossible to pump water. In addition, in the conventional pump equipment, when the check valve is provided, the installation location is not restricted because the lift is small. However, when the conventional pump equipment is installed in the groundwater tank T at a large depth (for example, about 50 m or more), it is necessary to install a check valve in the pipe, but if the check valve is installed on the ground, At the time of stoppage, a large negative pressure is generated on the ventral side of the valve plate, a water column separation area is created over a wide area of the pumping pipe 1, the water in the pumping pipe 1 is vaporized, and a secondary water hammer or pumping pipe 1 is generated. There is a risk of damage.

In this respect, if the check valve is installed at the bottom of the rising portion of the pumping pipe 1, it is safe because the negative pressure is not generated and only positive pressure is received, but the pumping pipe 1 is prevented during the backflow prevention. Contaminants such as sand mixed in the water inside gradually settle, and eventually the valve plate may be buried in these contaminants, and there is a risk that pumping will not be possible again when the pump is restarted, and the check valve will also be large. Since it is fixed in the depth part, there was a problem that its maintenance was very troublesome. Therefore, it is an object of the present invention to provide a detachable submersible motor / pump facility which has a simple structure and can be applied to a deep-water groundwater tank, and in which the check valve can be easily maintained.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention raises and lowers a pump device by a raising and lowering means via a guide member to a bend of a pumping pipe installed in a tank. In a detachable submersible motor pump facility with a discharge port that can be attached to and detached from a bend, at least a check valve is integrated on the discharge side of the pump device, and the downstream end face of this check valve is attached to and removed from the bend. It is what

[0007]

【Example】

Next, an embodiment of the detachable submersible motor pump equipment according to the present invention will be described with reference to FIG. As is apparent from comparison with FIG. 2, the present invention integrally attaches a check valve 10 to the discharge port of the pump device 6 in the conventional detachable submersible motor pump facility, and the downstream end surface of the check valve 10 is integrated. Is a detachable surface S with respect to the bend 2, and a lock portion 8 that engages with a lock receiving portion 4 provided on the flange portion 3 of the bend 2 is provided on the body portion 11 of the check valve 10. It is provided on the sliding member 12 which is slid up and down by being guided by the guide member 5. Reference numeral 13 is a valve plate of the check valve 10. Therefore, according to the present invention, when the weight of the check valve 10 is larger than the weight of the conventional pump device 6 (W ₂ > W ₁ ), the pump device 6 and the check valve 10 are integrated. The horizontal distance L ₂ between the center of gravity G ₂ and the locking point a is longer than before (L ₂ > L ₁ ). That is, the crimping moment M ₂ = (L ₂ × W ₂ ) is larger than M ₁ , and even if the detachable submersible motor pump equipment is applied to a high-lift type, the detachable surface S can be prevented from separating. it can.

In addition, when the check valve 10 has a functional abnormality due to accumulation of foreign matters, or when performing a regular inspection, the check valve 10 is put on the ground by the pump 9 together with the chain 9 or the like. By pulling it up, it can be easily repaired and inspected, and maintenance can be performed easily. Although the check valve 10 is directly connected to the pump device 6 in the above-described embodiment, a short pipe may be interposed between the pump device 6 and the check valve 10, or the check valve main body may be provided. It is also possible to provide a short pipe on the downstream side of and to crimp the short pipe to the bend 2.

[0009]

[Effect of device]

 As is clear from the above description, according to the present invention, the check valve is integrated with the discharge port of the conventional pump device, and the downstream end surface of the check valve is crimped to the bend. It solves the problems of conventional detachable submersible motor pump equipment by increasing the crimping moment to prevent separation of the attachment / detachment surface even in the case of high lift and enabling easy maintenance of the check valve. Is.

[Brief description of drawings]

FIG. 1 is a schematic view of a removable submersible motor pump facility according to the present invention.

FIG. 2 is a schematic view of a conventional detachable submersible motor pump facility.

FIG. 3 is a diagram showing a state immediately before connection of a submersible motor pump to a bend in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pumping pipe, 2 ... Bend, 4 ... Lock receiving part, 5 ... Guide member, 6 ... Pump device, 8 ... Locking part, 9 ... Chain, 10
… Check valve, S… detachable surface, T… water absorption tank.

Claims (1)

[Scope of utility model registration request] 1. A detachable submersible motor pump facility, wherein a pump device is lifted and lowered by a lifting means via a guide member to a bend of a pumping pipe installed in a tank, and a discharge port of the pump device is attached to and detached from the bend. At least a check valve is integrated with the discharge side of the pump device, and a downstream end surface of the check valve is a detachable surface with respect to the bend, and the detachable submersible motor pump facility.