JP3228724U - Synchronous opening and closing type double piston valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a design margin and a flow rate of a pipeline and a control valve because two pistons can open and close a fluid passage by moving along an axial direction of the pipeline and hold an opening / closing position without applying an external force. Provided is a synchronous opening / closing type double piston valve with improved accuracy. SOLUTION: A valve main body 10, two pistons 11 and 12, two control rods 13 and 14, and an interlocking member 15 are provided. The valve body has a chamber 101 and two piston pedestals located on opposite sides of the chamber in the axial direction. The piston is installed in the chamber and opens and closes the chamber by moving toward or away from the piston pedestal in the axial direction. The control rod has a rod head and a rod arm that is fitted into the chamber from the outside of the valve body and is connected to each piston. The interlocking member has two guide grooves into which the rod heads are fitted. [Selection diagram] Fig. 1

Description

The present invention relates to a fluid control member, and more particularly to a synchronous opening / closing type double piston valve.

Conventional valves use a single piston to control the flow of fluid (eg, liquid, gas, etc.) in the pipeline. Such a single piston valve is equipped with a piston pedestal and a braking mechanism (for example, a spring, a pneumatic device, a mechanical electric member, a mechanical screw, a mechanical plunger, etc.) on one side in the radial direction of the pipeline.

However, in the above-mentioned conventional technique, since the piston moves along the radial direction of the pipeline to open and close the fluid passage, the length of the piston pedestal is set to the length of the piston stroke (approximately the inner diameter of the pipeline). It needs to be longer, and the addition of a braking mechanism to the piston pedestal increases the overall size of the valve, limiting the valve mounting position. Further, in the case of a valve that controls the flow of substances in the pipeline by using a double piston, it is necessary to improve the flow rate control accuracy of the fluid of the double piston.

Therefore, the present inventor considered that the above-mentioned drawbacks could be improved, and as a result of diligent studies, he came up with a proposal of the present invention to effectively improve the above-mentioned problems with a rational design.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a synchronous opening / closing type double piston valve capable of opening / closing a fluid passage by moving a double piston synchronously. ..

According to one aspect of the present invention, it is a synchronous opening / closing type double piston valve that can open / close the fluid passage by moving the double piston synchronously, and is located on both sides of the chamber and the chamber facing each other in the axial direction. A valve body having two piston pedestals, two pistons installed in the chamber and moving so as to approach or separate from the two piston pedestals in the axial direction to open and close the chamber. Two control rods each having a rod head and a rod arm fitted into the chamber from the outside of the valve body and connected to each of the two pistons, and two fitted with the two rod heads, respectively. An interlocking member having a guide groove is provided.

In one aspect of the present invention, the two rod heads are spherical.

In one aspect of the present invention, the shapes of the two guide grooves are arcuate or obliquely linear.

In one aspect of the present invention, the synchronous opening / closing piston valve further includes a diaphragm installed on the side wall of the chamber, and the two rod arms are connected to the two pistons via the diaphragm, respectively.

In one aspect of the present invention, the diaphragm is an elastic polymer film.

The synchronous opening / closing type double piston valve according to the present invention is installed in the chamber, a valve body having a chamber, two piston pedestals located on both sides facing each other in the axial direction of the chamber, and the two piston pedestals. On the other hand, two pistons that can open and close the chamber by moving so as to approach or separate in the axial direction, a rod head, and a rod head that is fitted into the chamber from the outside of the valve body and connected to the two pistons, respectively. It comprises two control rods each having a rod arm and an interlocking member having two guide grooves into which the two rod heads are fitted, and the two pistons are axially oriented in the conduit. By moving along and the rod head of the control rod moves along the guide groove of the interlocking member, the fluid passage of the valve body can be opened and closed, and the interlocking member can hold the opening and closing position of the double piston without applying external force. Therefore, the design margin of the pipeline and the control valve and the control accuracy of the flow rate can be effectively improved.

It is an axial sectional view which shows the state which the synchronous opening and closing type double piston valve which concerns on this invention are closed. It is an axial sectional view which shows the state which the synchronous opening and closing type double piston valve which concerns on this invention are open. It is an axial sectional view which shows the piston pedestal and the piston of the synchronous opening and closing type double piston valve which concerns on this invention. It is a top view which shows the interlocking member of the synchronous opening / closing type double piston valve which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It goes without saying that the present invention is not limited to the following examples, and can be arbitrarily changed without departing from the gist of the present invention. By the way, in order to show the main features of the present invention in an easy-to-understand manner, each drawing only illustrates the relative relationship between the main members or the outline of the operation, and is not drawn based on the actual size. Therefore, the size, shape, arrangement, arrangement, etc. of the main members in the drawing are for reference only, and do not limit the scope of the present invention.

The synchronous opening / closing type double piston valve according to the present invention is installed in a fluid pipeline and can open / close the fluid passage in the fluid pipeline. FIG. 1 is an axial sectional view showing a state in which the synchronous opening / closing type double piston valve according to the present invention is closed. FIG. 2 is an axial sectional view showing a state in which the synchronous opening / closing type double piston valve according to the present invention is opened.

The description of this specification and the drawings will clarify at least the following matters.

With reference to FIGS. 1 and 2, the synchronous opening / closing type double piston valve 1 includes a valve body 10, two pistons 11 and 12, two control rods 13 and 14, an interlocking member 15, and a diaphragm 16. Be prepared. The valve body 10 has a chamber 101 arranged in the axial direction (for example, the Z axis of FIGS. 1 and 2), two piston pedestals 102 and 103 located on both sides of the chamber 101 facing each other in the axial direction, and two pistons. It has two joints 104 and 105 that are connected to the pedestals 102 and 103 and communicate with the chamber 101, respectively. The two joints 104 and 105 have threads that join the fluid pipeline (not shown), and the two piston pedestals 102 and 103 and the inside of the two joints 104 and 105 form a fluid passage. The two pistons 11 and 12 installed in the chamber 101 are cylindrical bodies, and the area in the radial direction thereof is larger than the area in the radial direction of the two piston pedestals 104 and 105, and the axes with respect to the two piston pedestals 102 and 103. The chamber 101 can be opened and closed by moving so as to approach or separate in the direction. The two control rods 13 and 14 have rod heads 131 and 141 and rod arms 132 and 142, respectively, and the two rod arms 132 and 142 are attached to the two pistons 11 and 12 from the outside of the valve body 10 via the diaphragm 16. Each is fitted. The interlocking member 15 is connected to a braking mechanism (not limited to including manual, pneumatic equipment, mechanical, electric, etc., not shown) and has two guide grooves 151 and 152 (interlocking members of FIGS. 1 and 2). 15 is shown in the plan view). The two rod heads 131 and 141 are spherical and are fitted into the two guide grooves 151 and 152, respectively. The diaphragm 16 installed on the side wall of the chamber 10 is made of an elastic polymer and can reciprocate the rod arms 131 and 141 and prevent fluid from leaking radially along the chamber 10.

In the present embodiment, when the synchronous opening / closing type double piston valve 1 is opened, the braking mechanism rotates the interlocking member 15, so that the rod heads 131 and 141 of the two control rods 13 and 14 are interlocking members of the guide grooves 151 and 152. It slides from one end (mesial end) close to the center of 15 toward one end (centrifugal end) away from the center of the interlocking member 15, and the pistons 11 and 12 are formed by the rod arms 132 and 142 of the two control rods 13 and 14. Opens the fluid passages of the two piston pedestals 102 and 103 synchronously, and the fluid flows from the pipeline joined to one side of the valve body 10 to the conduit joined to the other side of the valve body 10. When the interlocking member 15 rotates 90 degrees counterclockwise, the pistons 11 and 12 reach the maximum open state, and the braking mechanism controls the rotation angle of the interlocking member 15, so that the fluid flow rate in the pipeline can be accurately controlled. And.

When the synchronous opening / closing type double piston valve is closed, the braking mechanism rotates the interlocking member 15 so that the rod heads 131 and 141 of the two control rods 13 and 14 move from the distal end to the mesial end of the guide grooves 151 and 152. The two control rods 13 and 14 slide and the pistons 11 and 12 synchronously close the fluid passages of the two piston pedestals 102 and 103 by the rod arms 132 and 142 of the two control rods 13 and 14, blocking the flow of fluid in the pipeline and double piston. By moving 11 and 12 along the axial direction of the conduit, the size of the synchronous opening / closing type double piston valve 1 in the radial direction of the conduit (for example, the Y axis of FIGS. 1 and 2) is significantly reduced and adjacent to each other. The distance between the pipelines and the control valve can be improved.

By the way, when the user adjusts the synchronous opening / closing type double piston valve 1 to the desired open / closed state of the fluid passage, the interlocking member 15 also controls the control rods 13, 14 and the piston 11 even if the braking mechanism does not continuously apply an external force. , 12 positions can be maintained, and the need for the braking mechanism and energy of the synchronous opening / closing type double piston valve 1 can be effectively reduced.

FIG. 3 is an axial sectional view showing a piston pedestal and a piston of a synchronous opening / closing type double piston valve according to the present invention. As shown in FIG. 3, each of the pistons 11 and 12 has slot holes 111 and 121 for fitting and accommodating the rod arms 132 and 142 inside. In order to increase the mechanical strength and the accuracy of controlling the pistons 11 and 12, each rod arm 132 and 142 may further be provided with a reinforcing member fitted therein.

FIG. 4 is a schematic plan view showing an interlocking member of a synchronous opening / closing type double piston valve according to another embodiment of the present invention. As shown in FIGS. 1, 2 and 4, in another embodiment, the interlocking member 15'is a rectangular plate having two diagonal guide grooves 151', 152', and two control rods 13, 14 The rod heads 131 and 141 of the above are fitted into the two guide grooves 151'and 152', respectively. When the synchronous opening / closing type double piston valve is opened, the braking mechanism moves the interlocking member 15'in the axial direction, and the rod heads 131 and 141 of the two control rods 13 and 14 move the interlocking member 15 of the guide grooves 151'and 152'. The pistons 11 and 12 are two piston pedestals by the rod arms 132 and 142 of the two control rods 13 and 14, sliding from the mesial end close to the center of the'to the distal end away from the center of the interlocking member 15'. The fluid passages 102 and 103 are opened synchronously, and the fluid flows from the pipeline joined to one side of the valve body 10 to the pipeline joined to the other side of the valve body 10. By controlling the length of the stroke of the interlocking member 15'by the braking mechanism, it is possible to accurately control the fluid flow rate in the pipeline.

When the synchronous opening / closing type double piston valve is closed, the braking mechanism moves the interlocking member 15'in the axial direction, so that the rod heads 131 and 141 of the two control rods 13 and 14 become the centrifugal ends of the guide grooves 151'and 152'. Sliding from to the mesial end, the rod arms 132, 142 of the two control rods 13 and 14 allow the pistons 11 and 12 to synchronously close the fluid passages of the two piston pedestals 102 and 103 to provide fluid in the pipeline. Block the flow.

Summarizing the above, the synchronous opening / closing type double piston valve according to the present invention includes a valve body, two pistons, two control rods, and an interlocking member. The valve body has a chamber and two piston pedestals located on opposite sides of the chamber in the axial direction, and the two pistons move so as to approach or separate in the axial direction with respect to the two piston pedestals. The chamber is opened and closed, and the rod arms of the two control rods are fitted into the chamber from the outside of the valve body and connected to the two pistons, respectively, and the two rod heads are fitted into the two guide grooves of the interlocking member. When the two pistons move along the axial direction of the pipeline, the rod head of the control rod moves along the guide groove of the interlocking member to open and close the fluid passage of the valve body, and the interlocking member is subjected to an external force. Since the open / closed position of the double piston can be held without being used, the design margin of the pipeline and the control valve and the control accuracy of the flow rate can be effectively improved.

The above-described embodiment is described for the purpose of allowing a person having ordinary knowledge in the technical field to which the present invention belongs to carry out the present invention. Various modifications of the above embodiment can be naturally performed by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention is not limited to the described embodiments, but is interpreted in the broadest range according to the technical idea defined by the claims for utility model registration.

1 Synchronous opening / closing type double piston valve 10 Valve body 11, 12 Piston 13, 14 Control rod 15, 15'Interlocking member 16 Diaphragm 101 Chamber 102, 103 Piston pedestal 104, 105 Joint 111, 121 Slot hole 131, 141 Rod head 132 , 142 Rod arm 151,151'Guide groove 152,152' Guide groove

Claims (5)

A synchronous opening / closing type double piston valve installed in a fluid pipeline.
A valve body having a chamber and two piston pedestals located on both sides of the chamber that face each other in the axial direction.
Two pistons installed in the chamber and capable of opening and closing the chamber by moving so as to approach or separate in the axial direction with respect to the two piston pedestals.
Two control rods each having a rod head and rod arms fitted into the chamber from outside the valve body and connected to the two pistons, respectively.
A synchronous opening / closing type double piston valve including an interlocking member having two guide grooves into which the two rod heads are fitted. The synchronous opening / closing type double piston valve according to claim 1, wherein the two rod heads are spherical. The synchronous opening / closing type double piston valve according to claim 1, wherein the shape of the two guide grooves is an arc shape or an oblique linear shape. The synchronous opening / closing type double piston valve according to claim 1, further comprising a diaphragm installed on the side wall of the chamber, the two rod arms being connected to the two pistons via the diaphragms. .. The synchronous opening / closing type double piston valve according to claim 4, wherein the diaphragm is an elastic polymer film.

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