JPH051677Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a self-priming pump.

[Prior Art] A normal self-priming pump is provided with a partition wall 4 that separates a suction side flow path 2 and a discharge side flow path 3 of a casing 1, as shown in FIG. The suction side flow path 2 is provided with a check valve including a valve body 6 that freely opens and closes an upstream opening 5 thereof. An impeller 15 (see FIGS. 2 and 3) is provided in the downstream opening 7, which is provided eccentrically with respect to the upstream opening 5.
is provided.

The valve body 6 is rotated via the neck 8 between a closed position where it comes into contact with a valve seat 19 (see FIGS. 2 and 3) provided in the upstream opening 5 and an open position shown by a two-dot chain line. During pump operation, the neck section 8 in particular is violently bent or twisted due to the external force associated with the flow of fluid. A protrusion 9 (shown in FIG. 1) is provided in a protruding manner, and in the open position, the vicinity of the free end of the valve body 6 is pressed against the protrusion 9, thereby preventing severe displacement and deformation of the valve body 6.

In the conventional device configured as above,
During operation, the negative pressure in the suction side flow path 2 and the positive pressure in the discharge side flow path 3 act simultaneously on the partition wall 4, so the partition wall 4 must be strong enough to withstand these combined pressures. However, it is not possible to expect a reinforcing effect just by providing the projections 9, so it has been necessary to make the partition wall 4 thicker, especially when the casing 1 is made of synthetic resin.

[Problems to be solved by the invention] The present invention has been made under the above circumstances, and is a self-priming type that is equipped with a means to prevent harmful deformation, displacement, etc. of the valve body and to reinforce the bulkhead. The purpose is to provide pumps.

[Means for Solving the Problems] The present invention has a structure in which at least the vicinity of the free end of the valve body of the check valve is in contact with the partition wall that separates the suction side flow path and the discharge side flow path when the check valve is in the open state. It is characterized in that a plurality of reinforcing members that can be contacted are provided in a protruding manner.

[Operation] Since the present invention is equipped with the reinforcing members, at least the vicinity of the free end of the valve body abuts the plurality of reinforcing members when the check valve is in the open state during pump operation, This prevents harmful displacement and deformation of the neck due to vibration or twisting of the valve body. In addition, since the reinforcing member is provided to protrude from the partition wall, it has sufficient strength against the combined pressure of the negative pressure on the suction side and the positive pressure on the discharge side without making the entire partition wall thick. This is particularly suitable when the casing is molded from synthetic resin or the like.

[Embodiment of the invention] Hereinafter, the present invention will be described with reference to an illustrated embodiment. In FIGS. 1 and 2, the casing 10
It has a partition wall 13 that separates a suction side flow path 11 and a discharge side flow path 12, and is integrally molded from a suitable synthetic resin. A check valve 14 is provided at the upstream opening of the suction side flow path 11, and an impeller 15 is provided at the downstream opening.
are provided eccentrically from each other. Check valve 14
The valve body 18 includes a valve body 18 which is bendably connected to an annular base 16 attached to the casing side via a neck portion 17, and a valve seat 19 which can be opened and closed by the valve body 18. The above general configuration may be the same as that in the conventional example, and by rotationally driving the impeller 15, the suction side flow path 11
When fluid flows into the valve body 18, the valve element 18 is rotated toward the open position shown in the figure, and when the rotation stops, the fluid pressure in the opposite direction causes the valve body 18 to be rotated to the closed position where it comes into contact with the valve seat 19. .

In the present invention, a plurality of reinforcing members 20 (in the case of two reinforcing members in the figure) are provided, which are integrally protruded from the partition wall 13 during molding thereof. In the illustrated example, this reinforcing member 20 has a substantially triangular shape, and two sides that are substantially perpendicular to each other are the annular portions 21 of the partition wall 13.
and the flat plate-like portion 22, respectively, and the third side 23 is adapted to mostly come into contact with the valve body 18 in the open position. If necessary, as illustrated in FIG.
It is also possible to make contact only near the free end 24 of.

[Effect of the invention] According to the above structure, when the check valve 14 is in the open state, at least the vicinity of the free end of the valve body 18 comes into contact with the plurality of reinforcing members 20, so that the valve body 18,
In particular, harmful displacement and deformation of the neck portion 17 can be effectively prevented, contributing to extending its life. In addition, the reinforcing member 20 allows the partition wall 1
3 can be reinforced to a desired strength, and harmful deformation and damage can be prevented without increasing the wall thickness. Therefore, it is particularly suitable for molding the casing 10 from synthetic resin or the like.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a sectional view taken along the - line in FIG. 1, FIG. 3 is a sectional view showing a modification of the same example, and FIG. 4 is a sectional view showing a conventional example. 10...Casing, 11...Suction side flow path, 1
2... Discharge side flow path, 13... Partition wall, 14... Check valve, 15... Impeller, 18... Valve body, 19... Valve seat, 20... Reinforcing member, 24... Near free end .

Claims (1)

[Scope of utility model registration request] In the pump, the check valve is provided in a suction side flow path separated from a discharge side flow path by a partition wall and that freely opens and closes an inflow side opening of the flow path, and the check valve is provided in the partition wall. A self-priming pump characterized in that a plurality of reinforcing members are provided protrudingly so that at least the vicinity of the free end of the valve body can come into contact with the valve body when the valve body is in the open state.