JPS60132082A - Diaphragm pump apparatus - Google Patents

Abstract

PURPOSE:To improve durability and facilitate maintenance by previously drenching the suction valves of a diaphragm pump apparatus which supplies liquid and gas at a same time under pressure, thus, reducing the trouble in the suction operation due to drying. CONSTITUTION:A suction-side flow passage 7 is formed onto the center base 5 of a diaphragm pump body 1 for an automatic analyzer, etc., and a water flow passage P for the supply of water by an outside pump is opened onto the suction-side flow passage 7 side where the suction-side flow passage 7 and a longitudinal flow passage 11 which communicates to the suction valves 12 and 13 installed onto the valve chambers 21 and 21' of diaphragms 2 and 2 are connected. Before the pump body 1 of the diaphragm pump apparatus is operated, water is fed from the water passage P by operating the outside pump, and the suction valves 12 and 13 are previously drenched.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm pump device, and more particularly to a diaphragm pump device suitable for automatic analyzers that require a pumping action that simultaneously sucks and discharges liquid and gas.

As is well known, a diaphragm pump device is configured to suck an object to be sucked, such as a liquid or gas, and then forcefully transport it to a desired position by reciprocating the diaphragm.

By the way, in the conventional diaphragm pump device,
Since the diaphragm and valve are made of rubber, when sucking and discharging only liquid or only gas,
Although this does not significantly affect durability, in the case of automatic analyzer ear 5g equipment, which requires the ability to aspirate and discharge liquid and gas at the same time, the valves and other parts may vibrate abnormally due to the gas, and its durability may be affected. However, there was a problem in that the amount of water was significantly reduced and maintenance became complicated.

In particular, with recent automatic analyzers, the frequency of driving the diaphragm Rf device has increased significantly as the number of samples processed has increased and processing has become faster and more continuous.
The current problem is that the valves of the device, especially the valves on the suction side, tend to dry out and cause trouble in the suction operation, and the maintenance is complicated.

This invention was created in view of the current situation, and
The purpose of this is to dramatically improve the durability of diaphragm pump devices that simultaneously suck and discharge gas and liquid, thereby greatly simplifying the maintenance of this type of diaphragm pump device. The aim is to provide equipment.

In order to achieve such an object, in the present invention, the object to be sucked is sucked into the valve chamber of the pump body by opening and closing the valve by the reciprocating movement of the diaphragm, and the object to be sucked into the valve chamber is pumped. A diaphragm pump device configured to force-feed to a required position outside the main body, wherein the suction side flow path of the pump main body has a suction side valve disposed in the suction side flow path when the pump is operated. It is constructed by forming a water flow path and supplying water.

Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

The diaphragm 44' [D according to this embodiment is composed of a pump body 1 and a driving body 20 that drives the diaphragms 2, 2 of this pump body 1, and these pump body 1 and the driving body 20 are As shown in the figure, it is housed and fixed at a predetermined position within the housing B. In addition, the symbols N and N' in the figure indicate nipples, and one end of these nipples N and N' is screwed to the suction port 3 and the discharge port 4 of the pump body 1, and the other end of one nipple N A suction tube (not shown) is connected to the nipple N', and a discharge tube (not shown) is connected to the other end of the other nipple N'.

As particularly shown in FIG. 3, the pump body l includes a flat center base 5, a pair of side bases 6.6' stacked and fixed on the upper and lower surfaces of the center base 5, and the side bases 6.6. ' A diaphragm 2.2 mounted on the upper and lower surfaces of the diaphragm 2.2 in a liquid-tight and air-tight manner;
．． The holding plate 8.8 is fixed to the side base 6.6' and the center base 5 with bolts and nuts 9.

As shown in FIG. 4, the center base 5 has the suction port 3 and the discharge port 4 opened in the seed portion 10 which is bulged at the front end thereof, and the center base 5 has the suction port 3 and the discharge port 4 opened at the seed portion 10 which is bulged at the front end thereof. 50, a suction side flow path 7 opened horizontally toward the rear end, and a suction side vertical flow path 11 connected to the terminal end of this flow path 7 and opened through the upper and lower surfaces of the center base 5. It consists of

Also, on the upper and lower surfaces of the side base 6.6' attached to the upper surface of the center base 5, there is a back check at the upper and lower ends of the suction side vertical flow passage 11 of the center base 5. A stepped portion is formed into which the valves 12 and 13 are fitted, and the side base 6 is provided at the same portion of the base 6.
A large-diameter flow path 14 is formed that vertically passes through the tube. On the other hand, a channel 1 is formed in a region corresponding to the formation region of the upper vertical channel 11.
4' are provided to pass through the upper and lower sides of the side base 6'.

Next, a discharge side channel 15 is opened from the bottom of the discharge port 4 opened in the center base 5 toward the rear end of the base 5.
is opened parallel to the suction side flow path 7, and at the end of the discharge side flow path 15, there is a large diameter discharge side vertical pile penetrating the upper and lower surfaces of the center base 5, as shown in FIG. Channel 16
are formed by connecting them. Check valves 17 and 18 are fitted into the upper and lower ends of the discharge side vertical pile channel 16, respectively, and the side bases 6.6I corresponding to the locations where the check valves 17 and 18 are disposed Narrow diameter channels 19 and 19' are respectively formed at predetermined portions of the side bases 6 and 6', passing through the upper and lower surfaces of the side bases 6 and 6'. The valve chambers 21 and 21' are connected to the upper and lower surfaces of the side bases 6 and 6', and to the upper and lower surfaces of the side bases 6 and 6'.
Diaphragms 2, 2 attached to the upper surface and the lower surface of 6', respectively
and this diaphragm 6.6
The drive body 2 is connected to the connectors 22 and 22 arranged on the outside of I.
The drive arm 23I23 of o is fixed.

As shown in FIG. 1, in the driving body 20, the driving arms 23, 23 vibrate vertically due to the excitation of the electromagnet, and the diaphragms 2, 2 reciprocate due to this vertical vibration, thereby increasing or decreasing the pressure in the valve chambers 21, 21'. is configured to do so.

Further, a water flow path P is provided on one side of the center base 5, as shown in FIG. Immediately before the operation of the equipment HD, as shown in FIG. The check valves 12 and 13 are configured to supply water to the check valves 12 and 13.

Next, the operation of the diaphragm pump device according to the above embodiment will be explained. First, when the operation switch Sw of the diaphragm pump device is turned on, the control circuit 25 activates the water motor M as shown in FIG. The water is pumped from the water storage tank 24 into the pump main body l and the water flow path P, and the water and water introduced into the flow path P are transferred to the suction side flow path 7.
From there, it is supplied to the check valves 12 and 13 via the vertical vertical flow path 11 on the suction side. Then, the check valves 12, 1.3 are set so that the gap S (see FIG. 3) between the valve portions 12a, 13a and the valve seats 12b, 13b is wet. When the check valves 12 and 13 are set in a wet state in this way, the control circuit 25 excites the drive body 20, which causes the drive arms 23 and 23 to vibrate up and down, causing the diaphragms 2 and 2 to move toward each other. Since the valves are reciprocated, the pressure within the valve chambers 21 and 21' increases and decreases with the reciprocating movements, and a suction and discharge operation is performed. The object to be aspirated (
In this case, both liquid and gas) are Nimple N → Suction Lo 3
→ Suction side flow path 7 → Suction side vertical flow path 11 → Check valve 12,
13 → flow path [4° 14' → sucked into the valve chambers 21, 21', after which the suctioned object is passed through the valve chambers 21, 21' → flow path 19.19' → check valves 17, 18 → discharge It is forced to the required drainage position via the side vertical passage 16 → the discharge side flow passage 15 → the discharge hole 4 → the nipple N'.

As explained above, this invention provides water to the check valves disposed on the suction side flow path to pre-wet the same before the diaphragm pump device operates.
13 and prevent suction pressure loss due to the diaphragm, the suction operation of the diaphragm pump device can be ensured, and this type of diaphragm pump device used for simultaneously suctioning liquid and gas can be Durability can be dramatically improved, and maintenance can be extremely simplified.

[Brief explanation of drawings]

The drawings show a diaphragm pump device according to an embodiment of the present invention, in which FIG. 1 is a perspective view of the device with a part of the housing cut away, and FIG. 2 shows the pump body of the device. FIG. 3 is an exploded perspective view of the pump body; FIG. 4 is a cross-sectional view taken along the line V-■ in FIG. 2; FIG. 5 is a cross-sectional view taken along the line ■-V in FIG. FIG. 6 is a diagram of the operating principle of the device. D...Diaphragm pump device P...and water flow path l...Pump body 2...Diaphragm 3...Suction port 4...Discharge port 7...Suction side flow path 12, 13...・Suction side check valve 20...driver 2
1.2],'... Valve Chambers Patent Applicant Nippon Techtron Co., Ltd.

Claims (1)

[Claims] The valve is opened and closed by the reciprocating motion of the diaphragm, thereby sucking the object to be sucked into the valve chamber of the pump body, and the object being sucked into the valve chamber is forced to be delivered to a desired position outside the pump body. In the diaphragm pump device, a water flow path is formed in the suction side flow path of the pump body to supply a required amount of water to a suction side valve disposed in the suction side flow path when the pump is operated. A diaphragm pump device characterized by: