JPH0596654U - Double solenoid type solenoid valve - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a double solenoid type solenoid valve which is a combination of two solenoids but can replace only the broken solenoid. [Structure] Two solenoids 9 of pilot solenoid valve 2
a and 9b are arranged in the vertical direction, and fitting portions 18 and 18 that are movable only in the axial direction are provided on the facing surfaces of these solenoids.
A and 9b are coupled so as to be movable only in the axial direction. [Effect] When one of the solenoids is broken, the connection can be separated and only the broken solenoid can be replaced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double solenoid type solenoid valve.

[0002]

[Prior Art]

 A plurality of ports and a valve body having an axial valve hole for opening these ports, first and second piston storage boxes disposed on both sides in the axial direction, and piston storage boxes The first and second pistons slidably inserted and the main valve body slidably inserted in the valve hole, and the main valve body is actuated by the pilot fluid pressure acting on the first and second pistons. A main valve that drives a valve to switch the flow direction of fluid between a plurality of ports, and is also arranged on one side in the axial direction of the main valve. A double solenoid type solenoid valve having a pilot solenoid valve for supplying and exhausting pilot fluid to and from a two-piston storage box, in which two solenoids are integrated by molding, is proposed in Japanese Utility Model Publication No. 64-41778. .. However, the previously proposed double solenoid type solenoid valve lacks consideration for maintenance, and if either one of the two integrally molded solenoids is damaged, the other undamaged solenoid is also not damaged. There is a problem that they must be discarded together.

[0003]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to provide a double solenoid type electromagnetic valve in which two solenoids can be coupled and the coupled solenoids can be individually replaced.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a valve body having a plurality of ports and an axial valve hole for opening these ports, and first and second piston housings arranged on both sides in the axial direction. A box, first and second pistons slidably inserted into these piston storage boxes, and a main valve body slidably inserted into the valve hole. A main valve that drives the main valve body by the acting pilot fluid pressure to switch the flow direction of the fluid between multiple ports, and an energization of two solenoids that are arranged on one axial side of the main valve and A double solenoid type solenoid valve having a pilot solenoid valve for supplying and discharging pilot fluid to and from the first and second piston storage boxes when released, wherein the pilot solenoid valve has the same outer shape and is vertically arranged. 1st, 2nd solenoid and this And a pilot valve body having first and second pilot valve portions for supplying and discharging pilot fluid to and from the first and second piston storage boxes by energizing and deenergizing the solenoids. It is characterized in that the two solenoids are integrally connected by fitting of fitting portions formed on the mutually facing surfaces and movable only in the axial direction.

[0005]

[Action]

 When the two solenoids are brought into contact with each other and moved in the direction of approaching each other, the fitting parts provided on these opposite surfaces are fitted together and the two solenoids can move only in the axial direction. Be combined with. In this case, since the two solenoids have the same outer shape, the two solenoids that can be coupled to each other can be formed by only one type of solenoid. If one of the solenoids is damaged, you can replace only the damaged solenoid by releasing the fitting by the fitting part and separating.

[0006]

【Example】

 The drawings show an embodiment of the present invention. This double solenoid type solenoid valve comprises a main valve 1 and a pilot solenoid valve 2 having two solenoids. The main valve 1 is equipped with a valve body 4 having an input port P for pressure fluid, output ports A and B, discharge ports EA and EB, and axial valve holes 4a through which these ports open, and mounted on both sides in the axial direction. First and second piston storage boxes 5a and 5b, first and second pistons 6a and 6b slidably inserted into these piston storage boxes, and slidably inserted into the valve hole 4a. When the main valve body 7 is pressed by the first piston 6a, the main valve body 7 communicates the flow paths between the ports P and A and B and EB, and is pressed by the second piston 6b. And the ports P and B and A and EA communicate with each other (see FIG. 2).

The pilot solenoid valve 2 includes first and second solenoids 9a and 9b having the same configuration and outer shape, and a pilot valve body 11 having first and second pilot valve portions 10a and 10b. There is. Solenoids 9a and 9b, which are shown in detail in FIG. 2, each have a coil 13, a fixed iron core 14, a movable iron core 15, and a magnetic frame 16 surrounding them, and the magnetic frame 16 has the same outer shape with an insulating sealing material. Configured as a well-known solenoid that is molded into a mold 17, and on opposite surfaces of each mold 17, an axial fitting portion 18 having a fitting convex portion 18a and a fitting concave portion 18b that are fitted to each other, Mounting holes 19 are respectively formed on the surfaces orthogonal to this, and the tip of the fitting convex portion 18a and the bottom of the fitting concave portion 18b are both slightly expanded in diameter. Therefore, when the fitting convex portions 18a, 18a and the fitting concave portions 18b, 18b are fitted, the solenoids 9a and 9b are coupled so as to be movable only in the axial direction (fitting direction).

The pilot valve body 11 includes the first and second pilot valve portions 10a and 10b that are individually driven by the first and second solenoids 9a and 9b, the common pilot input passage 21, and the common pilot discharge passage. 22 is provided. These pilot valve portions 10a, 10b are provided with supply valve seats 23, 23 communicating with the pilot common input passage 21, discharge valve seats 24, 24 communicating with the pilot common discharge passage 22, and a supply valve body for opening and closing these valve seats. 25, 25 and discharge valve bodies 26, 26, supply valve bodies 25, 25 and valve chambers 27, 27 and pilot chambers 28a, 28b in which discharge valve bodies 26, 26 move, valve chambers 27, 27 and pilot chambers 28a, 28b And a push rod (all not shown) provided in the flow path for moving the valve bodies 25, 25 and 26, 26 integrally as a unit. The body 25 opens the supply valve seat 23, the discharge valve body 26 closes the discharge valve seat 24, and when the solenoid is de-energized, the supply valve body 25 closes the supply valve seat 23 and discharges. Body 26 closes the discharge valve seat 24 is configured as a known pilot valve portion. Further, the pilot common input passage 21 and the pilot common discharge passage 22 communicate with the input port P and the pilot discharge port R by the pilot supply passage 30 and the pilot discharge passage 31, and the first and second pilot chambers 28a and 28b are The first and second pilot flow paths 32a and 32b communicate with the first and second piston storage boxes 5a and 5b.

Reference numerals 35a and 35b in the drawing denote first and second manual operation portions for manually supplying pilot fluid to the first and second piston storage boxes 5a and 5b, and 36 and 37 are solenoid 9a and 9b is a terminal box having a wiring board for supplying power to 9b and a cover for covering the terminal box.

In the above embodiment, the valve body 4 and the first and second piston housing boxes 5a and 5b are assembled by an appropriate means such as a mounting screw to form the main valve 1, and the pilot valve body 11 is mounted to the mounting screw 40, 40 is attached to the first piston storage box 5a. Next, when the terminal block 12 and the first and second solenoids 9a and 9b integrally joined by fitting the fitting portions 18 and 18 are assembled to the pilot valve body 11 by the mounting bolts 41 and 41, The main valve 1 and the pilot solenoid valve 2 are integrally connected. In this case, since the solenoids 9a and 9b are joined by fitting the fitting portions 18 and 18, these solenoids can be easily assembled to the pilot valve body 11. Also, if one of the solenoids is damaged due to some cause, the solenoid that has bound can be separated and only the damaged solenoid can be replaced, so maintenance is easy and inexpensive. The operations of the pilot solenoid valve 2 and the main valve 1 by energizing and deenergizing the solenoids 9a, 9b are the same as those of the known double solenoid type solenoid valve, and thus detailed description thereof will be omitted.

[0011]

[Effect of the device]

 In the present invention, two solenoids are coupled so as to be movable only in the axial direction, so that the two solenoids are coupled together to facilitate the assembly, but when one of the solenoids is damaged, Only the damaged solenoid can be replaced. Further, since the two solenoids have the same outer shape, it is possible to form a double solenoid that can be coupled with one type of solenoid.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment.

FIG. 2 is also a front view in vertical section.

FIG. 3 is an exploded perspective view showing a coupling mode of solenoids.

[Explanation of symbols]

 1 Main Valve 2 Pilot Solenoid Valve 4 Valve Body 4a Valve Hole 5a, 5b Piston Storage Box 6a, 6b Piston 7 Main Valve Body 9a, 9b Solenoid 10a, 10b Pilot Valve Part 11 Pilot Valve Body 18 Fitting Part P, A, B , EA, EB port

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Takumi Matsumoto 4-2-2 Kinnodai, Taniwahara-mura, Tsukuba-gun, Ibaraki SMC Tsukuba Technology Center

Claims (1)

[Scope of utility model registration request] 1. A valve body having a plurality of ports and an axial valve hole in which these ports open, and first and second piston storage boxes arranged on both axial sides of the valve body. Pilot having first and second pistons slidably inserted in these piston storage boxes and a main valve body slidably inserted in the valve hole, and acting on the first and second pistons A main valve that drives the main valve element by fluid pressure to switch the flow direction of the fluid between a plurality of ports, and a main valve that is arranged on one axial side of the main valve. A double solenoid type solenoid valve having a pilot solenoid valve for supplying and discharging pilot fluid to and from a first and a second piston storage box, wherein the pilot solenoid valve has the same outer shape and is vertically arranged. 2 solenoids and to these solenoids A pilot valve body having first and second pilot valve portions for supplying and discharging pilot fluid to and from the first and second piston storage boxes by energizing and deenergizing the first and second solenoids, and the first and second solenoids face each other. The double solenoid type pilot solenoid valve is characterized in that the double solenoid type pilot solenoid valve is integrally connected by fitting a fitting portion that is movable in the axial direction.