JPS602516B2 - Electromagnetic reciprocating fluid machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an electromagnetic reciprocating fluid machine that facilitates the work of attaching and detaching a cylinder and a piston.

An electromagnetic reciprocating fluid machine is a type of electromagnetic reciprocating fluid machine in which a piston repeatedly reciprocates through the interaction of a magnetic armature that moves due to the magnetic action of an electromagnet and a return spring that comes into play when the magnetic action of the electromagnet disappears. Unlike general fluid machines that convert motion into motion, the drive unit directly reciprocates the piston, so compared to conventional reciprocating fluid machines, there are fewer parts and it is easier to achieve high precision. It also has the features of being lightweight, compact, and low-cost to produce.

Therefore, this reciprocating fluid machine has come to be used for various purposes, and in recent years, it has been adopted as a sampling pump to determine the degree of air pollution, and the sampling of air and soot has become popular. It is being done. Pumps used for such sampling are not limited to electromagnetic reciprocating fluid machines, which are the object of the present invention, and are susceptible to contamination, as they not only contaminate the parts through which the fluid passes, but also cause rust or deterioration. It must be possible to clean the damaged parts and avoid rusting and deterioration.

However, since it is impossible to take such measures with conventional sampling pumps, this has been a cause of shortening the service life of the sampling pump. The present inventor focused on the fact that the cylinder and piston of an electromagnetic reciprocating pump can be cleaned more easily than a conventional reciprocating pump. This invention was invented for the purpose of making it easier to carry out the process, and the present invention will be explained below with reference to the embodiments shown in the drawings.

1 is a housing with heat dissipation fins protruding from both sides of the outer periphery.
The front part has a wide opening that accommodates the cylinder 9, and a rib that supports the rear part of the cylinder 9 is provided near the center of the interior.

2 is the rear cover, 3 is the core of the electromagnet which is fixed between the housing and the rear cover, 4 is the coil wrapped around the core 3, and in the center of the core 3 is a magnet 3a that faces from the left and right in FIG. , 3b.

5 is an AC power supply supplied to the coils 4, 4; 6 is a rectifier that rectifies the negative half wave of the AC current; only the positive AC half wave is energized to the coil 4 of the electromagnet; In synchronization, the electromagnet 3 repeats excitation and deenergization.

7 is a magnetic armature that moves across the magnetic flux on the center line of the magnetic poles 3a, 3b; 8 is a piston integrally coupled with the magnetic armature 7; the piston 8 is a cylinder 9 housed in the housing 1 as described above. When the iron core 3 is excited, the piston 8 moves forward (moves backward) to the position shown in FIG. 1 as the magnetic armature 7 is electromagnetically attracted. When the electromagnetic attraction force disappears, the elastic force of the return spring 10 causes a return movement (
It is configured to move forward (move forward).

Reference numeral 11 denotes an intermediate cylinder 11 interposed between the front opening of the housing and the large flap of the cylinder 9, and the cylinder 9 is positioned as described below.

In addition, in order to keep the contact surface with the intermediate cylinder 11 to the necessary minimum on the inner circumferential surface of the closed opening of the housing 1, a relief allowance lc is formed with a tapered surface. The intermediate cylinder 11 has an outer circumference flange 11a on the front side facing the front flange 1a of the housing, and an inner circumference flange 11 that catches the back surface of the cylinder 9 on the rear side.
It has b.

On the other hand, the cylinder 9 also has an outer circumferential flange 9b at the rear, and the outer circumferential flange 9b and the inner circumferential flange 11b of the intermediate cylinder 11 are in contact with each other from the front and rear directions as shown in FIGS. Intermediate cylinder 1
When the cylinder 1 is pulled out from the housing 1, the inner circumference flange 11b catches the outer circumference flange 9b so that the cylinder 9 can be sent out. Reference numeral 12 denotes a front cover that closes the front entrance between the housing and the cylinder 9. Both the front cover 12 and the intermediate cylinder 11 are inserted into the front cover toward the screw hole lb provided in the collar la of the housing 1. The intermediate cylinder 11 is connected by screwing a bolt 16 inserted into the intermediate cylinder 11, but a bolt for removing the intermediate cylinder (not shown) is located on the outer periphery flange 11a of the intermediate cylinder 11 at a position offset from the hole 11c into which the bolt 16 is inserted. ) is provided, and the intermediate cylinder removal bolt is screwed into the screw hole 11d.
Use the tip of the bolt to attach the intermediate cylinder 1 to the front flange of the housing.
a, so that the cylinder 9 can be removed from the housing 1 together with the intermediate cylinder 11. In addition, 13 is a suction valve provided in the syringe 9, 14 is a compression working chamber, 15 is a discharge valve, and 18 is a drain cock.

Next, the procedure for disassembling the cylinder 9 and piston 8 will be explained, referring to the above embodiment.

When removing the fluid remaining in the compression chamber 14 or the fluid passage, first loosen the bolts 16 and remove the front cover 12, which is sandwiched between the front cover 12 and the intermediate cylinder 11. The cylinder 9 can be removed together with the piston 8 in such a manner that it is fed out by the inner circumference flange 11b of the intermediate cylinder 11.

In addition, when the inside of the cylinder 9 and the surface of the piston 8 that are in direct contact with the sampling gas must be cleaned, or when these parts are replaced, the contact surface between the intermediate cylinder 11 and the housing 1 may be rusted. If the intermediate cylinder 11 is difficult to remove due to other reasons, screw a bolt (not shown) into the screw hole 11d of the intermediate cylinder 11 and remove it from the front side of the intermediate cylinder 11 (left side in Figure 2). As it is screwed in, the tip of the bolt presses against the flange la of the housing 1 and acts to lift the flange 11a of the intermediate cylinder 11 from the flange la of the housing 1, so even if the intermediate cylinder 11 is difficult to remove, it will do the same. The cylinder can be removed together with the cylinder 9.

The present invention has been described above based on Examples, but the present invention includes
The iron core of an electromagnet having opposing magnetic poles is fixedly attached from the front and rear directions, and a cylinder that removably accommodates a piston is attached and detached by means of an inner wall surface and a lip protruding from the center of the interior, perpendicular to the iron core. A housing that is freely supported horizontally, a magnetic armature that reciprocates with the piston on the center line between the magnetic poles in the cylinder by the alternating action of the magnetic action of the electromagnet and the spring force of the spring, and the piston is housed therein. In an electromagnetic reciprocating fluid machine of the type in which the entrance end head of the cylinder and the front end of the housing are commonly closed by a front cover that can be attached or detached with a screw, a maxim is formed on the rear outer periphery of the cylinder, and on the other hand, the front an intermediate section having an outer circumferential flange sandwiched between the front cover and the housing at the part thereof, a through screw hole for screwing in the mirror, and an inner circumferential mirror supporting the back surface of the outer circumferential flange of the cylinder at the rear part; is interposed between the housing and the cylinder so that the back surface of the outer circumferential flange of the cylinder is captured from the rear by the inner circumferential flange of the intermediate tube, and the front openings of the cylinder and the intermediate tube are commonly closed by the front cover. Moreover, since the outer periphery of the intermediate cylinder is removably clamped and fixed between the housing and the front cover, the cylinder can be firmly secured from the front and rear directions by the intermediate cylinder and the front cover. A special costume for chivalry.

Moreover, if the intermediate tube is pulled out from the housing, the cylinder can be pulled out from the housing together, and even if the contact surface between the intermediate tube and the cylinder is somewhat rusted, the cylinder can be easily pulled out. Furthermore, even if the intermediate cylinder itself is rusted on the inner wall of the housing, it can be easily lifted off the front flange of the housing by screwing bolts into the outer periphery of the intermediate cylinder, which is attached by the front cover and housing. When cleaning or replacing parts, the cylinder can be removed very easily and the time required for disassembly and repair can be significantly shortened. Therefore, the present invention greatly contributes to the maintenance and management of sampling pumps where rusting, contamination, and deterioration of the syringes and pistons cannot be avoided.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional side view, FIG. 2 is a cross-sectional plan view taken along arrow A-A in FIG. FIG. 3 is a longitudinal sectional front view in the viewing direction. 1...Housing, 3...Iron core, 7...Magnetic armature, 8
Piston, 9...Cylinder, 9b...Outer periphery collar, 10...Spring,
11...Intermediate cylinder, 11a...Outer circumferential collar, 11b...Inner circumferential collar, 11
c. 11d...Screw hole, 12...Front cover, 16...
·bolt. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 The iron core of an electromagnet having opposing magnetic poles is clamped and fixed from the front and rear directions, and a cylinder housing a piston in a removable manner is installed orthogonally to the iron core by means of an inner wall surface and a rib protruding from the center of the interior. A housing that is freely supported horizontally, a magnetic armature that reciprocates with the piston on the center line between the magnetic poles in the cylinder by the alternating action of the magnetic action of the electromagnet and the elastic force of the spring, and the piston is housed therein. In an electromagnetic reciprocating fluid machine in which the open end head of the cylinder and the front opening of the housing are commonly closed by a front cover that can be attached or removed with a screw, a collar is formed on the outer periphery of the rear part of the cylinder, and a collar is formed on the outer periphery of the rear part of the cylinder. The cylinder has an outer circumferential flange that is attached to the front cover and the housing, and the flange is provided with a through screw hole for screwing, and the rear part has an inner circumferential flange that supports the back surface of the outer periphery flange of the cylinder. An intermediate cylinder is provided between the housing and the cylinder, the back surface of the outer peripheral flange of the cylinder is captured from the rear by the inner peripheral flange of the intermediate cylinder, and the front openings of the cylinder and the intermediate cylinder are commonly closed by a front cover. and an electromagnetic reciprocating fluid machine in which the outer circumferential collar of the intermediate cylinder is removably clamped between the housing and the front cover.