TW201825823A - Electromagnetic valve capable of solving the problem of conventional electromagnetic valves in that the overall size thereof is large because key components are separately arranged and the airflow path to the piston chamber is long - Google Patents

Abstract

The present invention relates to an electromagnetic valve which solves the problem of the conventional electromagnetic valve in that the guide rod valve device and the main body of the electromagnetic valve are separately arranged, making the overall size become large, therefore this arrangement needs to be simplified; in addition, because the airflow path to the piston chamber is long, the volume is large, so the response time of the main valve becomes slower. The electromagnetic valve 1 of this invention is provided with three ports: a supply port, an outlet port, and an exhaust port, and is characterized in that the guide rod valve is opened and closed by a solenoid, the air is supplied to the piston chamber to drive the piston in response to the opening and closing, and the main valve is opened and closed by the piston. The main body 2 includes the piston chamber, the piston, the main valve, and the three ports, accordingly the flow path 9k from the guide rod valve 10 to the piston chamber 11a is shortened when the electromagnetic valve is in use, and a guide rod valve accommodating portion 8 is formed on one side of the piston chamber.

Description

   The electromagnetic valve   

The present invention relates to a double solenoid valve or a dual valve for controlling a pneumatic clutch, an air brake, and the like of a stamping machine.

It is known that the double solenoid valve 20 for pneumatic clutches and air brakes for safe and reliable operation of stamping machines is shown in Figs. 6 to 7, and includes a guide rod valve 23 and a guide rod body 21 having solenoids 23a and 23b. It is mounted on the valve body 22.

The valve body 22 is a structure in which a pressure return 3 port valve is integrated in parallel, and the two valves 22a and 22b serving as the main valve are operated simultaneously (a parallel flow type is shown in FIG. 7).

The pistons 22c and 22d that actuate the two valves 22a and 22b are provided on the upper portion of the valve body 22, and a flow path a that communicates with the piston chamber 22e that actuates the pistons 22c and 22d communicates the guide body 21 and the spacer 28. And wear.

In the above-mentioned double solenoid valve 20, the possibility of the two valves 22a and 22b failing at the same time is small. In the event of failure of one of the valves, the pressure generated at the outlet (action) of the port block 27 is suppressed to act To a lesser extent. As such, it is well known that this is the safety design with the highest priority for the safe operation of stamping machinery and the like.

As a well-known document of a device using a conventional 3-port solenoid valve, a document described in Patent Document 1 is known.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent No. 3286863

However, in the conventional double solenoid valve, the flow path a to the piston chamber is a flow path passing through the guide body 21 and the spacer 28, and there is a large volume of the flow path a and the main valve has Slow response time.

In addition, the fixed core 21a and the fixed core tube 21b are subjected to electron beam welding in order to ensure strength and airtightness. However, there are problems in that the number of manufacturing steps increases and the cost increases. Furthermore, since the coil 21c is exposed to the outside, the coil 21c needs to be entirely sealed with resin or the like in order to protect the coil, and the structure in which the guide rod body 21 that houses the guide rod valve is placed on the valve body 22 exists. The overall size of the double solenoid valve 20 becomes large and the design is poor. The solenoid valve of the present invention has been proposed in order to solve such a problem.

The purpose of the solenoid valve of the present invention to solve the above-mentioned problems and achieve the purpose is to open and close the pilot valve with a solenoid in the three ports including the supply port, the outlet port, and the exhaust port, and air is supplied by opening and closing the solenoid valve. In the solenoid valve that drives the piston to the piston chamber and opens and closes the main valve by the piston, the main body includes the above-mentioned piston chamber, the piston, the main valve, and the three-port solenoid valve. The flow path from the pilot valve to the piston chamber is shortened, and a pilot valve housing portion is formed on the side of the piston chamber.

The purpose of the solenoid valve of the present invention is to solve the above-mentioned problems and achieve the purpose. In the three ports having a supply port, an outlet port, and an exhaust port, a solenoid valve is opened and closed by a solenoid, and air is opened and closed by the The solenoid valve which is supplied to the piston chamber to drive the piston, and which opens and closes the main valve by the piston, is provided with the piston chamber, the piston, the main valve, and the three-port solenoid valve on the side of the piston chamber. A guide valve housing portion having an opening portion with an upper opening in the use state is formed, and a fixing means for fixing the solenoid is provided on a cover member covering the opening portion, and the fixing means is engaged with the fixing means. The fixed core of the solenoid is fixed.

The terminal block for the solenoid is provided on a part of the body of the solenoid valve.

The invention includes that the cover member is a heat radiating material for improving the heat radiation effect.

According to the solenoid valve of the present invention, the guide valve device is enclosed in the body of the solenoid valve, and the whole device is simplified. Thereby, the distance from the air flow path supplied from the pilot valve to the piston chamber is shortened, and the response time between the piston and the main valve is increased.

Since the fixed core of the solenoid is a cover member fixed to the main body of the solenoid valve, the excellent effect of efficiently dissipating the heat generated during the energization of the fixed core through the cover member is achieved.

1‧‧‧ Solenoid Valve

2‧‧‧ Ontology

2a‧‧‧ cover parts

2b‧‧‧Vent

2c‧‧‧Export port supply hole

3‧‧‧ supply port

4‧‧‧ exit port

5‧‧‧ exhaust port

6‧‧‧Terminal Block

7‧‧‧ Wire

7a‧‧‧coil lead

8‧‧‧ Stem valve storage section

9‧‧‧solenoid

9a‧‧‧Fixed Core

9b‧‧‧ mobile core

9c‧‧‧Fixing screw part

9d‧‧‧coil

9e‧‧‧Fixed nut

9f‧‧‧ movable core return spring

9g‧‧‧Upper sealing material

9h‧‧‧bottom sealing material

9i‧‧‧Compression spring for upper sealing material

9j‧‧‧Press spring for lower sealing material

9k‧‧‧flow

9m‧‧‧Exhaust flow path

9ma‧‧‧ Exhaust flow path on the movable core side

9n‧‧‧Fixed core tube

9p‧‧‧ exhaust port

10‧‧‧Pilot valve

10a‧‧‧supply hole

11‧‧‧ Pistons

11a‧‧‧Piston chamber

11b‧‧‧ Suction and exhaust port

11c‧‧‧Exhaust valve

12‧‧‧Main valve

12a‧‧‧tube socket

12b‧‧‧Restoration spring

12c‧‧‧Spring seat

13‧‧‧ Guide rod supply flow path

14‧‧‧ flow path for guide rod

20‧‧‧ Duplex solenoid valve

21‧‧‧Guide body

21a‧‧‧Fixed Core (Iron Core)

21b‧‧‧Fixed core tube (core tube)

21c‧‧‧coil

21d‧‧‧movable core

22‧‧‧Valve body

22a, 22b‧‧‧ valve

22c, 22d‧‧‧Piston

22e‧‧‧Piston chamber

23‧‧‧Pilot valve

23a‧‧‧solenoid

23B‧‧‧Solenoid

24‧‧‧Supply Port

25‧‧‧ exit port

26‧‧‧Exhaust port

27‧‧‧port block

28‧‧‧ spacer

Fig. 1 is an overall perspective view of a solenoid valve 1 of the present invention.

Fig. 2 is a front view (A) of the solenoid valve 1 of the present invention, and a bottom view (B) showing the wiring condition.

Fig. 3 is a rear view (A) of the state of the solenoid valve 1 with the cover removed, and a plan view (B) of the state of the solenoid valve 1 with the upper cover member removed.

FIG. 4-A is an explanatory diagram showing the operation of the solenoid valve 1 and the air flow when the pilot valve is turned off.

FIG. 4-B is a partially enlarged detailed view showing the structure of the solenoid and the guide rod valve of the solenoid valve 1. FIG.

FIG. 4-C is an explanatory diagram showing a state in which the air in the piston chamber flows to the atmosphere when the pilot valve of the solenoid valve 1 is turned on.

FIG. 5-A is an explanatory diagram showing the operation of the solenoid valve 1 and the flow of air from the supply port when the pilot valve is turned on.

Fig. 5-B is an explanatory diagram showing a state in which air flows to the piston chamber when the pilot valve of the solenoid valve 1 is turned on.

FIG. 6 is a perspective view of a double solenoid valve 20 according to a conventional example.

FIG. 7 shows a front view (A) and a side view (B) of a part of the multiple solenoid valve 20 after being broken.

As shown in FIG. 1 to FIG. 3, the solenoid valve 1 of the present invention is provided with a guide valve housing portion 8 adjacent to the piston chamber 11 a of the main body 2, and accommodates the solenoid 9 and the guide valve 10. The response time of the main valve 12 (see FIGS. 3 and 4-A) is increased, and the solenoid valve 1 is simplified as a whole.

    [Example 1]    

As shown in FIG. 1 and FIG. 2, the solenoid valve 1 of the present invention includes three ports of a supply port 3, an outlet port 4 (refer to FIG. 4-A), and an exhaust port 5, as shown in FIGS. 3 to 4-B. The solenoid valve 9 opens and closes the pilot valve 10, and air is supplied to the piston chamber 11a to drive the piston 11 by the opening and closing, and the main valve 12 is opened and closed by the piston 11. It should be noted that the above-mentioned solenoid valve 1 is described by taking a double solenoid valve as an example.

The piston chamber 11a, the piston 11, and the main valve 12 are provided at two positions, and the body 2 of the solenoid valve 1 with 3 ports is placed in the use state of the solenoid valve 1 (the vertical direction is set to the vertical direction). As shown in FIGS. 4-A and 4-B, the length of the flow path 9k of the above-mentioned pilot valve 10 to the piston chamber 11a is shortened, and a guide valve housing portion 8 is integrally formed adjacent to the side of the above-mentioned piston chamber 11a. So that it is enclosed in the body 2.

In addition, the upper portion of the guide valve housing portion 8 is opened to the upper surface and becomes an opening. The cover member 2a covering the opening is provided with a fixing means for fixing the fixing core 9a of the solenoid 9.

As shown in FIG. 4-A, the fixing means is formed by a through hole penetrating in the thickness direction of the cover member 2a, and a fixing nut 9e screwed to a screw portion protruding at one end of the fixed core 9a of the solenoid 9. A step portion is in contact with one end portion of the fixed core 9a and an inner edge portion of the through hole. Thereby, the fixing core 9a is fixed to the cover member 2a by screwing the fixing nut 9e to the screw portion of the one end protruding portion and then tightening it.

The cover member 2a is a heat-dissipating material for improving the heat-radiating effect, and is, for example, an aluminum material. Moreover, as shown in FIG. 4-A, the cover member 2a is formed to cover the opening portion of the guide valve housing portion 8 and is formed separately from the cover member that covers the upper opening portion of the piston chamber 11a. It is not limited to this embodiment, and may be a cover member that integrally covers the opening portion of the upper portion of the body 2 as a whole.

As shown in FIG. 2, the above-mentioned solenoid terminal block 6 is provided on a part of the body 2 of the solenoid valve 1. The solenoid 9 is assembled in the guide valve housing portion 8 on the side of the piston chamber 11 a of the main body 2, so it is enclosed in the main body 2.

Furthermore, as shown in FIG. 2 to FIG. 3, the wire 7 for electrical connection connected to the terminal block 6 is routed inward from the side below the main body 2 a and reaches the terminal block 6. Then, the coil lead 7a is wired from the terminal block 6 toward the coil 9d (see FIG. 4-A) of the solenoid 9.

As shown in FIGS. 4-A and 4-B, the solenoid 9 is generally fixed to a fixed core 9a, a movable core 9b, a fixed core tube 9n, a coil 9d, and a movable core fixed to the cover member 2a by a fixing nut 9e. The return spring 9f is configured.

As shown in FIG. 4-B, in the movable core 9b, as the guide rod valve 10, a rubber upper sealing material 9g and a rubber lower sealing material 9h are provided in the internal space portion of the movable core 9b to prevent air from flowing in. The compression spring 9i for the upper sealing material and the compression spring 9j for the lower sealing material.

The above-mentioned upper sealing material 9g is attached to the exhaust flow path 9m of the fixed core 9a to prevent air flow. In addition, as shown in FIG. 4-B, the lower sealing material 9h prevents the inflow of air from the supply hole 10a provided on the main body 2a side.

In addition, when the exhaust flow path 9ma provided in the movable core 9b is in the state shown in FIG. 4-B (the state where the guide rod is OFF), the air from the piston chamber 11a passes through the exhaust flow path of the fixed core 9a. 9m exhaust path to the outside.

As shown in FIGS. 4-A and 4-B, the flow path 9k at the lower portion of the guide valve 10 is a flow path that communicates with the lower portion of the guide valve housing portion 8 and the intake and exhaust ports 11b of the piston chamber 11a. . When the guide rod is ON, the air from the supply port 3 flows into the piston chamber 11a. On the other hand, when the guide rod is OFF, as shown in Fig. 4-C, the air in the piston chamber 11a is exhausted from the exhaust flow path 9ma to the above. The flow path 9m flows out and passes through the center portion of the fixed core 9a, and exhausts to the outside from the exhaust port 9p.

Regarding the piston 11 of the piston chamber 11a of the main body 2, the pipe seat 12a connected to the piston 11, the main valve 12 driven up and down via the pipe seat 12a, the return spring 12b, the spring seat 12c for the main valve 12, and the like The structure and function are the same as in the conventional example, so detailed description is omitted.

A method of operating the solenoid valve 1 of the present invention will be described. As shown in FIG. 4-A, in a state where the guide rod is OFF (power on of the solenoid 9 is OFF), the movable core 9b of the solenoid 9 is energized by the movable core return spring 9f and is in a lower position. As shown in FIG. 4-B, a gap α appears between the fixed core 9a and the movable core 9b.

The air in the piston chamber 11a is squeezed upward by the piston 11 due to the energizing force of the return spring 12b, so as shown in Fig. 4-C, the self-inhalation exhaust port 11b flows to the exhaust through a shorter flow path 9k. The flow path 9ma flows into the exhaust flow path 9m from the space portion of the gap α, and is exhausted to the outside from the exhaust port 9p.

When the movable core 9b is lowered to the lower position, the lower sealing material 9h is used to prevent air from entering from the supply hole 10a into the guide valve housing portion 8. At the same time, the air from the piston chamber 11a is prevented from flowing into the guide rod supply flow path 13 from the supply hole 10a.

By returning the above-mentioned piston 11 to the upper position, as shown in Fig. 4-A, the air from the supply port 3 cannot flow to the outlet port 4 because the main valve 12 is closed. On the other hand, air from the actuator side flows from the outlet port 4 to the exhaust port 5 and is exhausted to the outside.

Secondly, in the state where the guide rod is ON (power on of the solenoid 9), as shown in FIG. 5-A, in the solenoid 9, the movable core 9b is adsorbed by the fixed core 9a. As a result, the gap α shown in FIG. 4-B becomes 0 (zero).

By moving the movable core 9b in the upward direction, the covering effect of the lower sealing material 9h is released, and the supply hole 10a of the main body 2 becomes the "open" state. Then, high-pressure air flows from the supply port 3 through the guide flow path 14 and the guide supply flow path 13 from the supply hole 10 a into the inside of the guide valve housing portion 8.

As shown in FIG. 5-B, the above-mentioned air cannot be removed from the movable core because the movable core 9b is adsorbed by the fixed core 9a and the upper sealing material 9g is covered by the exhaust flow path 9m passing through the center portion of the fixed core 9a. An exhaust flow path 9ma (see FIG. 4-C) on the side penetrates into an exhaust flow path 9m (see FIG. 4-C) on the fixed core side. Therefore, the air flows into the flow path 9k. Then, air is ejected from the intake / exhaust port 11b at the front end of the flow path 9k to the piston chamber 11a. Compared with the length and volume of the conventional flow path, the flow path 9k has a very short distance and a small volume. Therefore, the response time of the piston 11 into which the air flows is increased.

By ejecting the air to the piston chamber 11a, the piston 11 is immediately pressed and moved downward in a short time. Thereby, as shown in FIGS. 5-A and 5-B, the exhaust valve 11c at the lower portion of the piston 11 covers the exhaust hole 2b of the main body 2 and blocks the flow path to the exhaust port 5. At the same time, the main valve 12 moves downward against the energizing force of the return spring 12b, and the supply hole 2c for the outlet port of the body 2 becomes the "open" state.

Since the supply hole 2c becomes "open", air enters the supply hole 2c from the supply port 3 and supplies air to the outlet port 4 at a predetermined pressure, for example, to drive various actuators of a punching machine.

In addition, when the energization of the solenoid 9 is turned off, the state shown in FIG. 4-A is obtained. The air in the piston chamber 11a is automatically discharged from the suction and exhaust port 11b through the flow path 9k and the exhaust flow path 9ma on the movable core side, the gap α of the guide valve housing portion 8, and the exhaust flow path 9m on the fixed core side. The air port 9p is exhausted to the outside.

The heat generated when the solenoid 9 is in the energized state is dissipated by the cover member 2a through the fixed core 9a. In this way, the solenoid valve 1 and the terminal block are integrated by incorporating a solenoid in the frame 2 of the main body 2 of the solenoid valve 1, thereby simplifying the solenoid valve as a whole, and realizing the response time of the main valve due to the shortened flow path length. Speed up.

    [Industrial availability]    

The solenoid valve 1 of the present invention can be widely applied to single-type and double-type solenoid valves.

Claims (4)

    A solenoid valve is provided with 3 ports of a supply port, an outlet port, and an exhaust port. A solenoid valve is opened and closed by a solenoid, and air is supplied to a piston chamber to drive the piston through the opening and closing of the pilot valve. The opening and closing of the main valve is characterized in that the main body provided with the above-mentioned piston chamber and the piston, the main valve, and the three-port electromagnetic valve is used to shorten the flow path from the guide valve to the piston chamber in the use state of the solenoid valve, and A guide valve housing portion is formed on the side of the piston chamber.         A solenoid valve is provided with 3 ports of a supply port, an outlet port, and an exhaust port. A solenoid valve is opened and closed by a solenoid, and air is supplied to a piston chamber to drive the piston through the opening and closing of the pilot valve. The opening and closing of the main valve is characterized in that a guide rod having an opening portion that opens the upper part in the use state is formed on the side of the piston chamber, the main body including the piston chamber and the piston, the main valve, and a 3-port solenoid valve. The valve accommodating part is provided with a fixing means for fixing the fixed core of the solenoid to a cover member covering the opening, and the fixing means is engaged with the fixed core of the solenoid for fixing.         For example, the solenoid valve of the scope of patent application No. 1 or 2, wherein the terminal block for the solenoid is provided in a part of the solenoid valve body.         For example, the solenoid valve of item 2 of the patent scope, wherein the cover member is a heat-dissipating material for improving the heat-dissipating effect.