CN202348477U - Novel gas pressure reducer - Google Patents

Abstract

The utility model discloses a novel gas pressure reducer, which comprises an upper cover, a lower cover and a valve body. The valve body is provided with a first-level valve cavity and a second-level valve cavity. The lower cover is fixed below the first-level valve cavity. The lower cover and the first-level valve cavity The pressure reducing valve parts are installed in the cavity, the side wall of the primary valve core is provided with an air inlet seat, the side wall of the secondary valve cavity is provided with an air outlet joint, the upper cover is fixed above the secondary valve cavity, and the channels of the primary and secondary valve cavity There is a flat spool and a flat spool seat between them. The flat spool is provided with a tapered connection part including the first and second stepped grooves. The first stepped groove is provided with an O-ring for the spool. The upper end of the flat spool is The nut of the pressure stabilizing chamber is fixed to the inner cavity of the pressure regulating spring seat, and the main valve core assembly of the pressure reducer is provided with an arc-shaped groove on the side facing the first-stage valve cavity, and the arc-shaped groove is inlaid with steel balls. The beneficial effect of the utility model is: the valve core O-ring is reversely installed in the first step-shaped groove, which can prevent it from falling off and ensure the airtight performance; the installation of steel balls on the main valve core component of the pressure reducer can reduce wear and increase its service life.

Description

New gas pressure reducer

technical field

The utility model relates to a gas supply device for an internal combustion engine, in particular to a novel gas pressure reducer.

Background technique

The pressure reducer for gas vehicles is installed in the gas pipeline, and its main function is to reduce the gas pressure. Since the compressed gas will absorb heat during the decompression process, it needs to be connected to circulating hot water to heat the natural gas.

There are many disadvantages in the structural design of the traditional gas pressure reducer. For example, the O-ring at the flat valve core structure is glued to the valve core. This treatment makes the O-ring easy to fall off; The diaphragm is sealed with a cone, which makes the system less stable.

Utility model content

The purpose of this utility model is to provide a novel gas pressure reducer in order to solve the above problems.

In order to achieve the above object, the utility model adopts the following technical solutions:

A new type of gas pressure reducer, including a lower cover, an upper cover and a valve body. The valve body is provided with a partition and a primary and secondary valve chamber located on the upper and lower sides of the partition. There are screw holes for the valve core seat of the pressure stabilizing chamber around the through hole of the valve cavity. The lower cover is fixed under the first-stage valve cavity through the valve body bolts. A set of pressure reducing valve components are installed in the lower cover and the first-stage valve cavity. The side walls of the primary and secondary valve chambers are respectively provided with an air inlet seat and an air outlet joint. The main valve core assembly of the pressure reducer is arranged between the air inlet seat and the primary valve chamber, and the upper cover is fixed to the secondary valve body by bolts. Above the chamber, a diaphragm of the pressure stabilizing chamber and a sealing cover are arranged between the upper cover and the valve body. The upper and lower stabilizing plates are arranged symmetrically on both sides of the diaphragm of the stabilizing chamber. The upper stabilizing plate is provided with a spring of the stabilizing chamber and a pressure regulating The spring rod seat, the spring of the pressure stabilizing chamber is arranged outside the pressure regulating spring rod seat, and the pressure regulating spring rod seat is provided with a pressure regulating spring rod. A flat valve core seat is fixed at the hole, and the flat valve core seat is equipped with a flat valve core, wherein,

The flat valve core seat has a cylindrical sleeve with an annular bottom and defines a pressure-stabilizing passage therein;

The flat spool has a tip provided at the through hole of the valve chamber, a spool shaft successively pierced through the pressure stabilizing channel, the sealing cover, the lower stabilizing plate, the diaphragm of the stabilizing chamber, and the upper stabilizing plate, The spool shaft is provided with a first threaded section at the end of the tip and a second threaded section at the end of the spool shaft, and the end of the flat spool is fixed to the inner chamber of the pressure regulating spring seat by a nut in the pressure stabilizing chamber ;

The cylindrical sleeve is equipped with a conical connecting part connected with the first threaded section of the flat valve core, and the conical connecting part is provided with first and second stepped grooves, and the inner edge of the second stepped groove is There is a columnar inner cavity penetrating toward the head of the tapered connection part, and the inner cavity is provided with an internal thread matching the external thread of the first thread segment.

Preferably, the first stepped groove is provided with an O-ring for the valve core.

Preferably, the main valve core assembly of the pressure reducer is provided with an arc-shaped groove on the side facing the primary valve cavity, and steel balls are embedded in the arc-shaped groove.

The beneficial effects of the utility model are: (1) the flat valve core structure composed of the flat valve core seat and the flat valve core fixed on the flat valve core seat ensures the stable operation of the gas pressure reducer; (2) the main pressure reducer The valve core assembly is inlaid with steel balls, which greatly prolongs its service life.

Description of drawings

Figure 1 is the outline drawing of the new gas pressure reducer.

Figure 2 is a sectional view of the new gas pressure reducer.

Figure 3 is an assembly drawing of the new gas pressure reducer.

Figure 4a is a schematic view of the front view of the flat valve core.

Figure 4b is a cross-sectional view of the flat valve core.

Fig. 5a is a schematic diagram of the side view structure of the flat valve core seat.

Figure 5b is a cross-sectional view of the flat valve core seat.

Fig. 6a is a front structural schematic view of the main valve core assembly of the pressure reducer.

Fig. 6b is a cross-sectional view of the main valve core assembly of the pressure reducer.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

A new type of gas pressure reducer, including a lower cover, an upper cover and a valve body. The valve body is provided with a partition and a primary and secondary valve chamber located on the upper and lower sides of the partition. The hole is located around the through hole of the valve chamber, and there are screw holes for the valve core seat of the pressure stabilizing chamber. The screw holes for the valve core seat of the pressure stabilizing chamber are used to install the flat valve core seat. , a group of pressure reducing valve components are installed in the lower cover and the first-stage valve chamber, the side walls of the first-stage and second-stage valve chambers are respectively provided with an air inlet seat and an air outlet joint, and a pressure reducing valve is installed between the air inlet seat and the first-stage valve chamber. The main valve core assembly of the pressure regulator, the upper cover is fixed above the secondary valve cavity through the valve body bolts, and the pressure stabilizing chamber diaphragm and sealing cover are arranged between the upper cover and the valve body, and the upper and lower sides of the stabilizing chamber diaphragm are arranged symmetrically The lower stabilizing plate and the upper stabilizing plate are provided with a stabilizing cavity spring and a pressure regulating spring rod seat, and the stabilizing cavity spring is arranged outside the pressure regulating spring rod seat, and a pressure regulating spring rod is arranged inside the pressure regulating spring rod seat, so A flat valve core seat is fixed at the screw hole of the valve core seat of the pressure stabilizing chamber around the through hole of the valve cavity, and the flat valve core seat is equipped with a flat valve core, wherein, as shown in Figures 5a and 5b, the flat valve core The core seat 36 has a cylindrical sleeve with an annular bottom 361 and defines a pressure-stabilizing passage 362 therein; , the sealing cover, the lower stabilizing plate, the diaphragm of the stabilizing chamber, the spool shaft of the upper stabilizing plate, the spool shaft is provided with the first thread segment 394 at the end of the tip and the first threaded segment 394 at the end of the spool shaft Two threaded sections 393, the end of the flat valve core is fixed in the inner chamber of the pressure regulating spring seat through the pressure stabilizing chamber nut;

Referring to Figures 4a and 4b, the cylindrical sleeve is equipped with a conical connecting portion 390 connected to the first threaded section of the flat valve core, and the conical connecting portion is provided with first and second stepped grooves 391, 392, the inner edge of the second stepped groove is provided with a columnar inner cavity penetrating toward the head of the tapered connection part, and the inner cavity is provided with an internal thread that matches the external thread of the first thread segment, and the first stepped The groove is provided with a spool O-ring 56 .

As shown in Figures 6a and 6b, the main valve core assembly 22 of the pressure reducer is provided with an arc-shaped groove on the side facing the first-stage valve cavity, and a steel ball 221 is embedded in the arc-shaped groove.

Describe in detail below in conjunction with accompanying drawing:

As shown in Figures 1 to 3, the new gas pressure reducer includes: an upper cover 53, a lower cover 3, and a valve body 25 located between the upper and lower covers, and the upper cover 53 and the lower cover 3 pass through eight valve body bolts. 1. It is fixed on the upper and lower ends of the valve body. The bolt sleeve of the valve body is provided with an elastic washer 2, and the side wall of the upper cover is provided with a vacuum pipe joint 54;

The inner cavity of the lower cover is provided with a spring fixed rubber hose 5, which is sleeved with a decompression chamber spring 4, and a decompression chamber diaphragm 9 is provided between the valve body and the lower cover. There are four bolt holes in the ring, the decompression chamber diaphragm 9 is provided with a decompression plate 8 near the lower cover end, and the external thread end of the rocker arm assembly 11 is set through the through hole of the decompression chamber diaphragm and extends into the inner cavity of the lower cover, and fixed by the decompression chamber nut 6, the decompression chamber nut 6 is set with the decompression chamber spring washer 7, and the decompression chamber diaphragm 9 is provided with a decompression support film on the side far from the lower cover piece 10, which is sleeved on the rocker arm assembly 11, and the rocker arm assembly is also provided with a decompression chamber pan head bolt 12;

The rocker arm assembly 11 is provided with a rocker horse head fixing pin 13;

The air inlet of the valve body is sequentially installed with an air intake seat 15 outside the decompression chamber, a straight two-way joint 17, an air intake seat 20 in the decompression chamber, and a main valve core assembly 22 of the pressure reducer from the outside to the inside, wherein the decompression chamber The external thread provided by the external air intake seat 15 is matched with the internal thread provided on the head of the air intake seat 20 in the decompression chamber, and the straight two-way joint 17 is sleeved on the air intake seat 15 outside the decompression chamber, and the A two-way O-ring 16 is provided at the contact between the two ends of the joint 17 and the air inlet seat 15 outside the decompression chamber and the air inlet seat 20 in the decompression chamber, and the end of the through hole of the air inlet seat 15 outside the decompression chamber is close to the decompression chamber A gasket 18 and a high-pressure filter sheet 19 are provided at the inner cavity of the air intake seat 20, and the air intake seat 20 in the decompression chamber is provided with an aluminum pad 21 of the high-pressure inner air intake seat, and the lower side of the air inlet of the valve body Two water joints 14 are installed, the water joints are connected to the side wall of the air inlet of the valve body through threads, and a water circulation bolt 24 is installed on the upper part of the air inlet of the valve body, and the water circulation bolt is provided with a water temperature sensor;

The valve body is provided with a primary valve cavity 23 and a secondary valve cavity 34, and the side wall of the valve body located at the position of the secondary valve cavity 34 is provided with a gas outlet connector 26 with an external thread, and the gas outlet connector passes through the gas pressure pipe It is connected with the air inlet of the injection rail, and there is also a safety valve port on the side wall of the primary valve cavity 23. The safety valve port is equipped with a safety valve seat 31, and the front end is provided with external threads, and the inner cavity of the tail is provided with internal bolts. The threaded head of the safety valve seat is provided with a safety valve O-ring 30, and the safety valve seat 31 is provided with a safety valve rubber head 27, a safety valve inner core 28, a safety valve spring 29 and a safety valve connected to the tail of the safety valve seat through threads. Seat bolt 32;

The side wall of the secondary valve cavity 34 of the valve body is provided with an opening, and the opening is provided with an internal thread, through which the internal thread is matched and connected with the plug 33 of the pressure stabilizing chamber with an external thread, and the threaded head of the plug of the stabilizing chamber The tail is provided with a plenum chamber bolt O-ring 57;

The bottom of the secondary valve chamber 34 is fixed with a flat valve core seat 36 by a flat valve core seat screw 37. A valve seat O-ring 35 is arranged between the flat valve core seat and the bottom of the secondary valve cavity, and the flat valve core seat 36 is installed. There is a flat valve core 39, a valve core O-ring 38 is arranged between the flat valve core 39 and the flat valve core seat 36, and a flat valve core O-ring 56 is also arranged between the flat valve core and the sealing cover 42;

A plenum diaphragm 46 is provided between the upper cover and the valve body. A through hole is provided in the middle of the plenum diaphragm 46 and four bolt holes are arranged around it. The plenum diaphragm 46 is close to the secondary valve cavity 34- There is a sealing cover 42 on the side, and a sealing cover O-ring 40 is provided between the sealing cover and the side wall of the valve body; the sealing cover 42 is equipped with a sealing cover vacuum joint 41, and the sealing cover is provided with a sealing cover center O-ring 43 , both sides of the pressure stabilizing cavity diaphragm 46 are provided with an upper stabilizing plate 44a and a lower stabilizing plate 44b, and a stabilizing plate O-ring 45 is provided between the stabilizing plate and the stabilizing cavity diaphragm 46, and the upper stabilizing plate 44b A pressure-stabilizing chamber spring pad 47 is provided at the place, and the pressure-stabilizing chamber spring pad 47 is provided with a pressure-stabilizing chamber nut 48 connected to an external thread provided at the tail of the flat valve core 39, and one end of the pressure-stabilizing chamber spring 49 is fixed on the upper stabilizing plate 44b On, the pressure regulating chamber spring 49 is wound on the pressure regulating spring rod seat 51, the pressure regulating spring rod seat 51 is provided with a pressure regulating spring rod 50, and the pressure regulating spring rod is provided with a pressure regulating spring rod O-ring 52, The top of the upper cover 53 is provided with an upper cover cover plate 55 .

The above descriptions are only preferred implementations of the present utility model, and the scope of protection of the present utility model is not limited to the above-mentioned implementations. All technical solutions belonging to the principle of the utility model belong to the protection scope of the utility model. For those skilled in the art, some improvements made on the premise of not departing from the principle of the utility model, these improvements should also be regarded as the protection scope of the utility model.

Claims (3)

1. A new type of gas pressure reducer, comprising a lower cover, an upper cover and a valve body, the valve body is provided with a baffle and a primary and secondary valve cavity positioned on the upper and lower sides of the baffle, and the baffle is provided with a valve The through hole of the cavity is located around the through hole of the valve cavity, and there are screw holes for the valve core seat of the pressure stabilizing cavity. The lower cover is fixed below the first-stage valve cavity through the valve body bolts, and a set of pressure reducing valve components are installed in the lower cover and the first-stage valve cavity. , the side walls of the primary and secondary valve chambers are respectively provided with an air inlet seat and an air outlet joint, and the main valve core assembly of the pressure reducer is arranged between the air inlet seat and the primary valve chamber, and the upper cover is fixed on the secondary valve body by bolts. Above the stage valve cavity, there is a pressure stabilizing chamber diaphragm and a sealing cover between the upper cover and the valve body. The upper and lower stabilizing plates are arranged symmetrically on both sides of the stabilizing cavity diaphragm, and the upper stabilizing plate is provided with a stabilizing chamber spring and The pressure regulating spring rod seat, the pressure regulating chamber spring is arranged outside the pressure regulating spring rod seat, and the pressure regulating spring rod seat is provided with a pressure regulating spring rod, and it is characterized in that the pressure regulating chamber spool around the through hole of the valve cavity A flat valve core seat is fixed at the seat screw hole, and the flat valve core seat is equipped with a flat valve core, wherein, The flat valve core seat has a cylindrical sleeve with an annular bottom and defines a pressure-stabilizing passage therein; The flat spool has a tip provided at the through hole of the valve chamber, a spool shaft successively pierced through the pressure stabilizing channel, the sealing cover, the lower stabilizing plate, the diaphragm of the stabilizing chamber, and the upper stabilizing plate, The spool shaft is provided with a first threaded section at the end of the tip and a second threaded section at the end of the spool shaft, and the end of the flat spool is fixed to the inner chamber of the pressure regulating spring seat by a nut in the pressure stabilizing chamber ; The cylindrical sleeve is equipped with a conical connecting part connected with the first threaded section of the flat valve core, and the conical connecting part is provided with first and second stepped grooves, and the inner edge of the second stepped groove is There is a columnar inner cavity penetrating toward the head of the tapered connection part, and the inner cavity is provided with an internal thread matching the external thread of the first thread segment. 2. The new gas pressure reducer according to claim 1, characterized in that, the first stepped groove is provided with a spool O-ring. 3. The new gas pressure reducer according to claim 1, characterized in that, the main valve core assembly of the pressure reducer is provided with an arc-shaped groove on the side facing the first-stage valve cavity, and the arc-shaped groove is inlaid with There are steel balls.

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