Fuel gas pressure reducing valve

Abstract

A fuel gas pressure reducing valve comprises a valve body, a valve cover, an adjusting screw, a leather membrane, a bracket, a valve plug and a pressure adjusting spring, the valve body comprises a gas inlet connector, a gas inlet cavity, a valve seat, a gas outlet cavity and a gas outlet connector, the leather membrane comprises a plug arranged in the center of the lower surface, an annular protrusion with a lower opening and a sealing protrusion arranged on the lower surface, and a membrane connecting hole is formed in the plug; the bracket comprises a central spring cavity and a seat connecting hole; the valve plug comprises a rod part, a plug part, a bayonet socket arranged at the upper end and a connecting rod, the leather membrane is arranged at the opening end of the air outlet cavity, the bracket is attached to the leather membrane, the valve cover and the air inlet cavity are buckled to fix the leather membrane, the rod part penetrates through the valve seat and the plug to be inserted into the bayonet socket, and the connecting rod penetrates through the membrane connecting hole and the seat connecting hole to be matched with the clamping spring; the pressure adjusting spring is matched with the central spring cavity and the adjusting screw; and the adjusting screw is screwed with an internal thread adjusting seat on the valve cover. And through the arrangement of the diaphragm plug and the bayonet socket on the valve plug, the joint of the valve plug and the diaphragm is firm, the diaphragm is effectively prevented from being abraded, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a device for a gas appliance, in particular to a gas pressure reducing valve. Background Art

[0002] The current existing technology, Chinese patent 202320771772.X, a dual-outlet pressure-stabilizing valve, includes a valve cover, a valve body, a pressure-stabilizing valve core, a diaphragm, a seat plate, a pressure-stabilizing spring, a fine-tuning seat, a top cover and a switch assembly. The annular seat is embedded in the annular fixing groove, and the valve cover is buckled with the air inlet cavity to fix the diaphragm; the seat plate fits the circular body, the pressure-stabilizing valve core is fixed with the diaphragm and the seat plate and extends into the main outlet cavity to cooperate with the pressure-stabilizing valve core seat; the flange of the fine-tuning seat is screwed with the cylindrical sleeve, the sleeve body is inserted into one end of the pressure-stabilizing spring, and the other end cooperates with the seat plate, and the top cover closes the open end of the cylindrical sleeve; the switch assembly is arranged in the secondary outlet cavity to control the on and off of the secondary outlet cavity. The existing problems are: the thickness of the junction between the diaphragm and the pressure-stabilizing valve core is small, the pressure-stabilizing valve core and the diaphragm move up and down for a long time, are easy to age and wear, and have a short service life. Utility Model Content

[0003] The utility model aims to provide a gas pressure reducing valve which has the characteristics of membrane pressure resistance and long service life.

[0004] The utility model is realized in this way: a gas pressure reducing valve, which is special in that it includes a valve body, a valve cover, an adjusting screw, a membrane, a bracket, a valve plug and a pressure regulating spring.

[0005] The valve body includes an air inlet interface, an air inlet cavity, a valve seat, an air outlet cavity and an air outlet interface.

[0006] The membrane includes a plug arranged at the center of the lower surface, a circular protrusion with a lower opening, and a sealing protrusion arranged on the lower surface, and a membrane connection hole is arranged on the plug;

[0007] The bracket includes a central spring cavity and a seat connecting hole;

[0008] The valve plug includes a stem, a plug, a socket at the upper end and a connecting rod.

[0009] The diaphragm is arranged at the opening end of the air outlet cavity, the support seat is fitted with the diaphragm, the valve cover is buckled with the air inlet cavity to fix the diaphragm, the rod passes through the valve seat, the plug is inserted into the socket, the connecting rod passes through the membrane connecting hole and the seat connecting hole and cooperates with the retaining spring; the pressure regulating spring cooperates with the central spring cavity and the adjusting screw, and the adjusting screw is screwed with the internal thread adjusting seat on the valve cover.

[0010] The special feature of the gas pressure reducing valve is that: the support seat is provided with a lower annular spring groove seat, and the valve cover is provided with an upper annular groove seat;

[0011] Also includes a balance spring,

[0012] The two ends of the balance spring are matched with the upper annular groove seat and the lower annular spring groove seat respectively.

[0013] The gas pressure reducing valve is special in that: a guide seat is provided at the bottom of the air inlet cavity, and a guide cavity is provided on the guide seat;

[0014] The lower end of the stem of the valve plug is slidably matched with the guide cavity.

[0015] The gas pressure reducing valve is special in that: a countersunk hole is provided at the upper end of the valve seat;

[0016] It also includes valve seat parts, O-rings and valve port seals.

[0017] The valve seat member includes a cylindrical body, an annular clamping plate arranged in the cylindrical body, a flange, a sealing ring groove and an external threaded portion.

[0018] The valve port sealing member comprises a cylindrical portion and an annular clamping groove arranged on the cylindrical portion;

[0019] The O-type sealing ring is arranged in the sealing ring groove, the cylindrical part is inserted into the lower end of the cylindrical body, the annular clamping plate and the annular clamping groove are engaged, the external thread part is screwed with the valve seat, and the flange part is engaged with the countersunk hole.

[0020] The gas pressure reducing valve is special in that it also includes a locking nut, the adjusting screw is threadedly engaged with the locking nut, and the locking nut is fitted with the top of the internal thread adjusting seat.

[0021] The utility model discloses a gas pressure reducing valve. The arrangement of a diaphragm plug and a plugging seat on the valve plug ensures that the connection between the valve plug and the diaphragm is firm, effectively preventing the diaphragm from being worn and prolonging the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of the utility model.

[0023] Figure 2 yes Figure 1 A-A view of.

[0024] Figure 3 It is a three-dimensional exploded view of the utility model.

[0025] Figure 4 It is a partial stereogram of the utility model. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1 As shown, a gas pressure reducing valve comprises a valve body 1, a valve cover 2, an adjusting screw 3, a membrane 4, a support seat 5, a valve plug 6 and an adjusting spring 7.

[0029] The valve body 1 comprises an air inlet interface 11, an air inlet cavity 12, a valve seat 13, an air outlet cavity 14 and an air outlet interface 15, and an annular groove is provided on the end surface of the opening end of the air outlet cavity 14;

[0030] The membrane 4 includes a plug 41 disposed at the center of the lower surface, a circular protrusion 42 with a lower opening, and a sealing protrusion 43 disposed on the lower surface. The plug 41 is provided with a membrane connection hole 411;

[0031] The bracket 5 includes a central spring cavity 51 and a seat connection hole 52;

[0032] The valve plug 6 comprises a rod portion 61, a plug portion 62, a plug seat 63 arranged at the upper end, and a connecting rod 64. The plug seat is provided with a plug cavity with an upper opening, and the connecting rod is arranged on the bottom plate of the plug cavity.

[0033] The diaphragm 4 is arranged at the open end of the air outlet cavity 14, the sealing protrusion 43 is engaged with the annular groove, the bracket 5 is fitted with the diaphragm 4, the valve cover 2 is buckled with the air inlet cavity 14 to fix the diaphragm 4, the rod 61 passes through the valve seat 13, the plug 41 is inserted into the plug cavity of the plug seat 63, the connecting rod 64 passes through the membrane connecting hole 411 and the seat connecting hole 52 and cooperates with the retaining spring 8, and the retaining spring 8 is fitted with the bottom plate of the central spring cavity 51; the adjusting spring 7 is matched with the blind hole of the lower opening of the central spring cavity 51 and the adjusting screw 3, and the adjusting screw 3 is screwed with the internal thread adjusting seat 21 on the valve cover 2. With such a structure, the setting of the plug 41 increases the thickness and area of ​​the connection between the diaphragm 4 and the rod 61. In the process of the rod driving the diaphragm to move up and down, it is not worn, thereby extending the service life.

[0034] As a further improvement of the utility model: the bracket 5 is further provided with a lower annular spring groove seat 53, and the valve cover 2 is provided with an upper annular groove seat 22;

[0035] Also includes a balance spring 9,

[0036] The two ends of the balance spring 9 are respectively matched with the upper annular groove seat 22 and the lower annular spring groove seat 53. With such a structure, the diaphragm 4 is kept in a horizontal state when it moves up and down, and tilting is prevented, so that the operation is stable and the pressure control is stable.

[0037] As a further improvement of the utility model: a guide seat 121 is provided at the bottom of the air inlet cavity 12, and a guide cavity is provided on the guide seat 121;

[0038] The lower end of the rod 61 of the valve plug 6 is slidably matched with the guide cavity of the guide seat 121. With such a structure, the valve plug 6 can be moved along its axis, thereby improving the pressure control performance.

[0039] As an improvement of the utility model: a countersunk hole is provided at the upper end of the valve seat 13;

[0040] It also includes a valve seat 101, an O-ring 102 and a valve port seal 103.

[0041] The valve seat member 101 includes a cylindrical body 1011, an annular clamping plate 1012 arranged in the cylindrical body, a flange 1013, a sealing ring groove 1014 and an external threaded portion 1015, wherein the sealing ring groove 1014 and the flange 1013 are adjacent to each other, and the sealing ring groove 1014 and the external threaded portion 1015 are arranged up and down; a straight-line rotating tool groove is arranged on the flange 1013;

[0042] The valve port seal 103 includes a cylindrical portion 1031 and an annular groove 1032 provided on the cylindrical portion, and the valve port seal is made of rubber material;

[0043] The O-ring 102 is disposed in the sealing ring groove 1014, the cylindrical portion 1031 is inserted into the lower end of the cylindrical body 1011, the annular clamping plate 1012 is engaged with the annular clamping groove 1032, the external threaded portion 1015 is screwed with the valve seat, and the flange portion 1013 is engaged with the countersunk hole. The plug portion 62 is matched with the lower end of the cylindrical portion 1031.

[0044] As a further improvement of the utility model, a locking nut 16 is further included, the adjusting screw 3 is threadedly engaged with the locking nut 16 , and the locking nut 16 is in contact with the top of the internal thread adjusting seat 21 .

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gas pressure reducing valve, characterized in that: It includes valve body, valve cover, adjusting screw, diaphragm, support seat, valve plug and pressure regulating spring. The valve body includes an air inlet interface, an air inlet cavity, a valve seat, an air outlet cavity and an air outlet interface. The membrane includes a plug arranged at the center of the lower surface, a circular protrusion with a lower opening, and a sealing protrusion arranged on the lower surface, and a membrane connection hole is arranged on the plug; The bracket includes a central spring cavity and a seat connecting hole; The valve plug includes a stem, a plug, a socket at the upper end and a connecting rod. The diaphragm is arranged at the opening end of the air outlet cavity, the support seat is fitted with the diaphragm, the valve cover is buckled with the air inlet cavity to fix the diaphragm, the rod passes through the valve seat, the plug is inserted into the socket, the connecting rod passes through the membrane connecting hole and the seat connecting hole and cooperates with the retaining spring; the pressure regulating spring cooperates with the central spring cavity and the adjusting screw, and the adjusting screw is screwed with the internal thread adjusting seat on the valve cover.

2. A gas pressure reducing valve according to claim 1, characterized in that: The bracket is also provided with a lower annular spring groove seat, and the valve cover is provided with an upper annular groove seat; Also includes a balance spring, The two ends of the balance spring are matched with the upper annular groove seat and the lower annular spring groove seat respectively.

3. A gas pressure reducing valve according to claim 1, characterized in that: A guide seat is provided at the bottom of the air inlet cavity, and a guide cavity is provided on the guide seat; The lower end of the stem of the valve plug is slidably matched with the guide cavity.

4. A gas pressure reducing valve according to claim 1, characterized in that: The upper end of the valve seat is provided with a countersunk hole; It also includes valve seat parts, O-rings and valve port seals. The valve seat member includes a cylindrical body, an annular clamping plate arranged in the cylindrical body, a flange, a sealing ring groove and an external threaded portion. The valve port sealing member comprises a cylindrical portion and an annular clamping groove arranged on the cylindrical portion; The O-type sealing ring is arranged in the sealing ring groove, the cylindrical part is inserted into the lower end of the cylindrical body, the annular clamping plate and the annular clamping groove are engaged, the external thread part is screwed with the valve seat, and the flange part is engaged with the countersunk hole.

5. A gas pressure reducing valve according to claim 1, characterized in that: It also includes a locking nut, the adjusting screw is threadedly engaged with the locking nut, and the locking nut is fitted with the top of the internal thread adjusting seat.

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