JPH04125685U - bellows pump - Google Patents

Abstract

(57) [Summary] [Purpose] Liquid can be supplied without causing pulsations in the flow, eliminating the passage of dirt through the filter attached to the discharge side, and supplying with uniform pressure. [Configuration] Check valve pair 3a and 3b and check valve 3c and 3
Bellows 6 and 7 are provided to operate d, and the strobe end timings of expansion and contraction are shifted from each other, thereby making the fluid flow uniform and reducing pulsation.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a bellows pump that sends liquid in one direction by expanding and contracting the bellows. .

0002

[Conventional technology]

FIG. 2 is a partially cutaway plan view of a conventional bellows pump. Traditionally, this For example, a type of bellows pump has a suction port and a discharge port at both ends, as shown in Figure 2. A manifold 2 in which a hole is formed, and mutual contact between the holes in this manifold 2. A check valve that is installed on the inner wall facing the wall and prevents flows in opposite directions. a pair of check valves 3a and 3b, and a manifold that includes and operates the check valve pair 3a and 3b. A bellows 6 is mounted facing the outside of the hold 2, and a bellows 6 is wrapped around the bellows 6. At the same time, the housing 1 attached to the manifold 2 and the bellows 6 are fully extended. A Strom end sensor 4 detects the end and compressed air is sent into the housing 1. , and a port 5 for contracting the bellows 6.

0003 Next, the operation of this bellows pump will be explained. First, let's start with the solenoid valve (not shown). By switching, compressed air is supplied to either port 5. Due to this, The bellows 6 contracts, the check valve pair 3b closes, and the check valve pair 3a opens. This effect The liquid flows from the suction side to the discharge side. Next, bellows 6 extends and strokes When the air sensor 4 is activated, the solenoid valve is switched and compressed air is sent to the port 5. child As a result, the bellows 6 on the opposite side contracts, the check valve pair 3a closes, and the check valve pair 3a closes. b, and the liquid flows from the suction side to the discharge side. Perform these actions continuously . The liquid was being sent from the suction side to the discharge side.

0004

[Problem that the idea aims to solve]

In this conventional bellows pump, a set of bellows moves to expand and contract. Since a pair of non-return valves was activated to suck up fluid and push it out, there was a large impact on the flow of fluid. The dust trapped in the filter attached to the bellows pump causes pulsation. There was a problem in that the pressure change caused by the water passing through the filter.

[0005] The purpose of this invention is to solve this problem by creating a circular flow without causing pulsation in the flow. To provide a bellows pump capable of sending fluid at a smooth flow rate.

[0006]

[Means to solve the problem]

The bellows pump of the present invention has a hole with an inlet and an outlet on both sides. a manifold, and a pair of check valves in the same direction installed on the corresponding wall of the hole. , the manifold includes two check valve pairs having mutually different directions. In a bellows pump having a pair of bellows attached to both outer walls of the At least two pairs of bellows are attached to the manifold, and these bellows It is characterized by shifting the time when the pairs of lenses expand and contract.

[0007]

【Example】

Next, the present invention will be explained with reference to the drawings.

[0008] FIG. 1 is a partially exploded plan view of a bellows pump showing an embodiment of the present invention. this As shown in Fig. 1, the bellows pump is a reverse pump installed on the inner wall of the manifold 2a. A pair of check valves 3a and 3b and a base including and operating the pair of check valves 3a and 3b. A pair of roses 7 and a pair of check valves 3c and 3d provided on the inner wall of the manifold 2a. , including these check valves 3c and 3d, and a pair of bellows 6 to be operated. It is. It contains these check valve pairs and creates a check valve pair by expanding and contracting. This is because the timings of expansion and contraction of the moving bellows pairs 6 and 7 are shifted from each other.

[0009] In this way, a two-stage bellows pair 6 and 7 is provided to open and close the check valve pair by expanding and contracting. , a Strom end sensor 4 with seven pairs of bellows corresponding to the check valve pairs 3a and 3b. and the stroke of the 6 pairs of bellows corresponding to the check valve pairs 3c and 3d. The liquid flowing into the manifold 2a is shifted from the timing detected by the liquid end sensor 4. This is done so that the body's pulsating currents cancel each other out. Therefore, the bellows pairs are multistage. It is desirable that there be. In this case, the multi-stage bellows will expand and contract in sequence. Switch the solenoid valves in sequence and supply compressed air to the port at a predetermined period of time. For example, the liquid flows at a uniform speed from the suction side to the discharge side without any pulsation. .

0010

[Effect of the idea]

As explained above, the present invention utilizes a bellows system that operates the check valve pair by its expansion and contraction. By providing at least two stages of pairs and staggering their operating timings, the This makes the flow of fluid uniform from the source to the discharge side, allowing debris that remains in the filter to pass through. This has the effect of providing a bellows pump that can supply liquid without any amount of liquid.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of a bellows pump showing an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of a bellows pump showing a conventional example.

[Explanation of symbols]

1,1a housing 2,2a Manifold 3a, 3b, 3c, 3d Check valve pair 4 Stroke end sensor 5 port 6,7 Bellows

Claims (1)

[Scope of utility model registration request] 1. A manifold in which a hole having an inlet and an outlet is formed on both sides, a pair of check valves attached to corresponding walls of the hole and facing the same direction, and a pair of check valves having mutually different directions. In a bellows pump having two pairs of check valves and a pair of bellows attached to both outer walls of the manifold, at least two pairs of bellows are attached to the manifold, and the time when the bellows pairs expand and contract is A bellows pump characterized by shifting.