JP2008088870A - Delivery valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a valve element surely and timely return even if the valve element strongly hits a deformation regulating plate provided outside of the valve element when excessive force is applied on the valve element. <P>SOLUTION: At least one of opposing surfaces of the deformation regulating plate 6 and the delivery valve 4 has characteristics appropriately separating the delivery valve 4 from the deformation regulating plate 6 without adhering on the deformation regulating plate 6 when the delivery valve 4 abuts on the deformation regulating plate 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a discharge valve device in a gas compressor or the like.

  In a gas compressor or the like, at the outlet end of the pressurized gas discharge port provided in the cylinder in which the piston is inserted, for example, a strip plate valve having one end supported by the cylinder, or a circular plate valve having the center supported by the cylinder is provided, Some of these plate valves open and close the pressurized gas discharge port.

In such a case, in order to prevent the plate valve from opening excessively and improperly closing it, or excessive stress acting on the plate valve to impair its durability, Providing a deformation restricting plate for restricting the deformation or displacement of the plate valve at a predetermined interval outside the valve is well known as described in, for example, Patent Document 1.
JP 58-131484 A

  However, in such a case, for example, when the pressure of the discharge gas becomes excessive, the plate valve suddenly greatly deforms or displaces, strongly hits the deformation restricting plate, and the plate valve from the deformation restricting plate Separation timing may be disturbed.

  Also, when oil or other foreign matter is present on the facing surfaces of one or both members, or when the space between the facing surfaces of both members is in a reduced pressure state, the open plate valve is adsorbed by the deformation regulating plate. In some cases, it may become impossible to return the plate after being separated from the deformation regulating plate in a timely manner.

  Furthermore, if the plate valve repeatedly strikes the deformation regulating plate repeatedly, it may cause noise.

  The same applies to the case where the valve body is other than the plate valve and the discharge port is opened and closed by being displaced.

  The present invention is a gas compressor or the like, in which a valve body is restricted from being deformed at a predetermined interval outside a strip-shaped or circular plate valve or other type valve body provided at a compressed gas discharge port. Even when an excessive force is applied to the valve body and oil or other foreign material exists between the valve body and the deformation regulating plate, the valve body An object of the present invention is to obtain a discharge valve device that reliably returns from the deformation regulating plate and closes.

According to the present invention, the above object can be solved by the following means described in the claims.
(1) In a discharge valve device in which a deformation restricting plate for restricting deformation or displacement of the discharge valve is disposed outside the discharge valve provided at the outlet of the discharge port of the compressed gas, the deformation restricting plate and the discharge At least one of the surfaces facing the valve is of a property that allows the discharge valve to be properly separated without adhering to the deformation restriction plate when the discharge valve contacts the deformation restriction plate. .

  (2) In the above item (1), a non-adhesive buffer layer is formed on at least one of the deformation regulating plate and the opposing surface of the discharge valve.

  (3) In the above item (1), the deformation restricting plate is made of a slightly soft non-adhesive material.

  (4) In any one of the above items (1) to (3), a large number of small protrusions (including protrusions) are provided on at least one of the deformation regulating plate and the opposing surface of the discharge valve.

  (5) In any one of the above items (1) to (3), a large number of small concave holes (including ridges) are provided in at least one of the deformation regulating plate and the opposing surface of the discharge valve.

  (6) In any one of the above items (1) to (5), the deformation restricting plate is made of a material having air permeability.

  (7) In any one of the above items (1) to (6), a large number of air holes in the thickness direction are formed in the deformation regulating plate.

  (8) In any one of the above items (1) to (5), the deformation restricting plate is made of a net-like body.

  Invention of Claim 1: The opening degree of the discharge valve by pressurized gas is controlled by a deformation | transformation control board, and even if an open discharge valve hits a deformation | transformation control board strongly, a discharge valve is a deformation | transformation control board. The return timing is not disturbed.

  Invention of Claim 2:-Since the buffer layer exists, the impact when the discharge valve strikes against the deformation regulating plate is small, the durability of the discharge valve is large, and the generation of noise is small. In addition, the material and thickness of the buffer layer can be selected to achieve the action most suitable for the operating state.

  Invention of Claim 3:-By selecting the material of the deformation | transformation control board itself, it can be made to achieve a desired objective appropriately, and manufacture of a deformation | transformation control board can be performed easily.

  Invention of Claim 4:-Since a discharge valve does not contact | adhere to a deformation | transformation control board, the isolation | separation is performed appropriately with sufficient timing.

  Invention of Claim 5: The effect similar to the previous claim is acquired.

  Invention of Claim 6:-Even if a discharge valve contacts a deformation | transformation control board strongly, a discharge valve is not adsorb | sucked to a deformation control board by pressure reduction action.

  Invention of Claim 7:-When a discharge valve contact | abuts to a deformation | transformation control board, both are pressure-reduced and a discharge valve is not adsorb | sucked to a deformation | transformation control board.

  Invention of Claim 8:-The effect similar to the preceding claim is exhibited.

  FIG. 1 is a longitudinal sectional view showing a main part of a gas compressor provided with the discharge valve device according to claims 1 and 2.

  A compressed gas discharge port 2 is provided at the upper surface of the cylinder 1 to which a piston (not shown) that is reciprocated with appropriate power is fitted.

  Horizontal flanges 3, 3 project from both sides of the discharge port 2 in the cylinder 1, and on the side of the discharge hole 2, the base of the strip-shaped discharge valve 4 is fixed to the flange 3 by the support shaft 5. It is worn.

  In addition, a base portion of a horizontal rigid deformation regulating plate 6 that is positioned immediately above the discharge valve 4 is attached to the upper portion of the support shaft 5 at an appropriate interval.

  A slightly soft non-adhesive buffer layer 7 facing the discharge valve 4 is formed on the lower surface of the deformation regulating plate 6 by polymerization.

  FIG. 2 shows an embodiment of the invention described in claim 3, and the deformation regulating plate 8 itself, which is the same as that in FIG. 1 and has the same arrangement, is made of a slightly soft non-adhesive material.

  FIG. 3 shows an embodiment of the invention described in claim 4, and there are many parts corresponding to the discharge valve 4 on the lower surface of the deformation restricting plate 9 in the same arrangement as in FIGS. 1 and 2. The small protrusion 10 is provided. The small protrusion 10 may be a large number of parallel protrusions or ring-shaped protrusions.

  FIG. 4 shows an embodiment of the invention described in claim 5, in which a large number of small concave holes (or small concave stripes) 12 are provided at locations corresponding to the discharge valve 4 on the lower surface of the deformation regulating plate 11. .

  FIG. 5 shows an embodiment of the invention described in claim 6, wherein the deformation restricting plate 13 is made of a material having air permeability, for example, a porous material.

  FIG. 6 shows an embodiment of the invention as set forth in claim 7, wherein the deformation restricting plate 14 itself is non-breathable, but has a large number of vent holes 15 in the thickness direction.

  FIG. 7 shows an embodiment of the invention as set forth in claim 8, wherein the deformation restricting plate 16 is a net plate.

It is a longitudinal cross-sectional view which shows the principal part of a gas compressor provided with the discharge valve apparatus which is one Embodiment of this invention. It is a longitudinal cross-sectional view of the principal part which shows other embodiment of this invention. It is a longitudinal cross-sectional view of the principal part which shows other embodiment of this invention. It is a longitudinal cross-sectional view of the principal part which shows other embodiment of this invention. It is a longitudinal cross-sectional view of the principal part which shows other embodiment of this invention. It is a longitudinal cross-sectional view of the principal part which shows other embodiment of this invention. It is a longitudinal cross-sectional view of the principal part which shows other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Discharge port 3 Flange 4 Discharge valve 5 Support shaft 6 Deformation restriction plate 7 Buffer layer 8 Deformation restriction plate 9 Deformation restriction plate 10 Small protrusion 11 Deformation restriction plate 12 Small concave hole (or small groove)
13 Deformation restricting plate 14 Deformation restricting plate 15 Ventilation hole 16 Deformation restricting plate

Claims (8)

  In a discharge valve device in which a deformation restricting plate for restricting deformation or displacement of the discharge valve is arranged outside the discharge valve provided at the outlet of the compressed gas discharge port, the deformation restricting plate and the discharge valve At least one of the opposing surfaces is characterized in that the discharge valve can be appropriately separated without adhering to the deformation restriction plate when the discharge valve abuts against the deformation restriction plate. A discharge valve device.   The discharge valve device according to claim 1, wherein a non-adhesive buffer layer is formed on at least one of the deformation regulating plate and the opposing surface of the discharge valve.   The discharge valve device according to claim 1, wherein the deformation regulating plate is made of a slightly soft non-adhesive material.   The discharge valve device according to any one of claims 1 to 3, wherein a large number of small protrusions (including protrusions) are provided on at least one of the deformation regulating plate and the opposing surface of the discharge valve.   The discharge valve device according to any one of claims 1 to 3, wherein a plurality of small concave holes (including concave stripes) are provided on at least one of the deformation regulating plate and the opposing surface of the discharge valve.   The discharge valve device according to any one of claims 1 to 5, wherein the deformation regulating plate is made of a material having air permeability.   The discharge valve device according to any one of claims 1 to 6, wherein a number of ventilation holes in the thickness direction are formed in the deformation regulating plate.   The discharge valve device according to any one of claims 1 to 5, wherein the deformation regulating plate is made of a net-like body.

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