CN217130430U - a safety valve - Google Patents

Abstract

The utility model provides a safety valve, which comprises a valve seat and a valve disc, the valve seat includes a sealing shell, the side of the sealing shell is connected to an air outlet channel, the top of the sealing shell is coaxially connected to an installation cylinder, and the bottom of the sealing shell is coaxially connected to an air inlet pipe joint, and the sealing The inner bottom of the casing is provided with a sealing disc, the edge of the sealing disc and the inner wall of the sealing casing are sealed and connected, an annular seat is installed in the middle of the top surface of the sealing disc, and the annular seat and the sealing disc are communicated; The top edge of the second fixed seat is connected with a number of vertically arranged and equally spaced guide shafts, the tops of the guide shafts are all arranged through the edge of the guide plate, and a support spring is arranged between the first fixed seat and the second fixed seat , the support spring is sleeved on the valve stem and the guide shaft. When the utility model is in use, the pressure of the support spring can be easily realized by adjusting the nut on the adjusting screw, the operation is simple and the use is convenient.

Description

a safety valve

technical field

The utility model belongs to the technical field of valves, in particular to a safety valve.

Background technique

The opening and closing actions of the spring safety valve depend on the change of the medium pressure at the inlet end and the preload force of the spring to make the valve core open and close automatically. When the medium pressure (internal pressure) rises to the point where the lifting force is greater than the spring preload force, the valve core will automatically open against the spring preload force, discharge the excess medium, and reduce the internal pressure. When the pressure drops to a safe value, the valve core is automatically closed and the discharge stops. Usually, you need to open the valve cover to adjust the pressure of the spring safety valve, and then tighten the nut on the top of the valve stem to adjust, so the adjustment process is cumbersome and cannot be adjusted immediately. For this reason, we propose a safety valve.

Utility model content

In order to solve the above deficiencies of the prior art, the utility model proposes a safety valve.

The technical scheme of the utility model is realized as follows: a safety valve includes a valve seat and a valve disc, the valve seat includes a sealing shell, the side of the sealing shell is connected with an air outlet channel, the top of the sealing shell is coaxially connected to the installation cylinder, and the bottom of the sealing shell is the same as The shaft is connected to the air inlet pipe joint, the inner bottom of the sealing shell is provided with a sealing disk, the edge of the sealing disk and the inner wall of the sealing shell are sealingly connected, and an annular seat is installed in the middle of the top surface of the sealing disk, and the annular seat is communicated with the sealing disk;

The valve flap includes a second fixed seat on the top of the annular seat, and the top edge of the second fixed seat is connected with a number of vertically arranged and equally spaced guide shafts. A valve stem is installed vertically in the center, the first fixed seat is coaxially connected to the valve stem, a support spring is arranged between the first fixed seat and the second fixed seat, the support spring is sleeved on the valve stem and the guide shaft, and supports The two ends of the spring are respectively arranged against the second fixed seat and the second fixed seat; the top of the installation cylinder is threadedly connected with a sealing end cover, and the top of the valve stem penetrates and is arranged in the center of the sealing end cover;

The top of the valve stem is connected with a bar-shaped connecting seat, the bar-shaped connecting seat is arranged horizontally, and an adjusting screw is arranged at the other end of the bar-shaped connecting seat, the adjusting screw penetrates the end of the bar-shaped connecting seat, and the adjusting screw is connected with at least one screw. A nut; the adjusting screw rod is arranged vertically downward, and the bottom of the adjusting screw rod is connected to the side surface of the sealing shell through a connecting seat.

Preferably, a ventilation pipe is connected to the side of the air inlet pipe joint, an exhaust valve is installed on one side of the ventilation pipe, and a gas pressure gauge is connected to the end of the ventilation pipe.

Preferably, a sealing ring is connected to the top edge of the annular seat, the sealing ring and the second fixing seat are in conical surface contact, a sealing gasket is connected to the bottom of the second fixing seat, and the sealing gasket is located on the top of the sealing ring.

Preferably, the tops of the guide shafts are provided with limit blocks.

Preferably, a first sealing ring is coaxially connected to the bottom of the sealing end cap, the first sealing ring is sleeved on the valve stem and a sealing ring is arranged therebetween.

Compared with the prior art, when the utility model is in use, the pressure of the support spring can be easily realized by adjusting the nut on the adjusting screw, the operation is simple and the use is convenient.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

FIG. 1 is a schematic front view of the structure of a safety valve proposed by the utility model.

FIG. 2 is a schematic view of the back side of the structure of a safety valve proposed by the utility model.

FIG. 3 is a schematic cross-sectional structure diagram of a safety valve proposed by the utility model.

In the figure: sealing shell 1, air outlet 2, installation cylinder 3, adjusting screw 4, bar-shaped connecting seat 5, valve stem 6, first sealing ring 7, first fixing seat 8, support spring 9, guide plate 10, guide Shaft 11, second fixing seat 12, sealing ring 13, vent pipe 14, gas pressure gauge 15, inlet pipe joint 16, sealing disc 17, annular seat 18, connecting seat 19, exhaust valve 20, sealing end cap 21, sealing Pad 22.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-3, the present utility model provides a technical solution: a safety valve, including a valve seat and a valve disc, the valve seat includes a sealing shell 1, the side of the sealing shell 1 is connected to an air outlet channel 2, and the air outlet channel 2 is used for discharging There are threads in the air outlet channel 2, which is convenient to connect with the external pipeline;

The top of the sealing shell 1 is coaxially connected to the installation cylinder 3, the bottom of the sealing shell 1 is coaxially connected to the intake pipe joint 16, the inner bottom of the sealing shell 1 is provided with a sealing disc 17, and the edge of the sealing disc 17 is sealed with the inner wall of the sealing shell 1. An annular seat 18 is installed in the middle of the top surface of the sealing disc 17, the annular seat 18 communicates with the sealing disc 17, the inlet pipe joint 16 is threadedly connected to the object, and the internal gas enters the inside of the annular seat 18 through the inlet pipe joint 16;

The valve flap includes a second fixed seat 12 on the top of the annular seat 18 , the top edge of the second fixed seat 12 is connected with a plurality of vertically arranged and equally spaced guide shafts 11 , and the tops of the guide shafts 11 are all arranged on the edge of the guide plate 10 . , a valve stem 6 is installed vertically in the center of the top surface of the guide plate 10, the first fixed seat 8 is coaxially connected to the valve stem 6, and a support spring 9 is arranged between the first fixed seat 8 and the second fixed seat 12, supporting The spring 9 is sleeved on the valve stem 6 and the guide shaft 11, and the two ends of the support spring 9 are respectively set against the second fixed seat 12 and the second fixed seat 12; the top of the installation cylinder 3 is screwed with a sealing end cap 21. The top of the valve stem 6 is arranged through the center of the sealing end cover 21.

As shown in FIG. 1, under the elastic force of the support spring 9, the top of the annular seat 18 is in close contact with the bottom of the second fixed seat 12, and the second fixed seat 12 seals the top of the annular seat. When the valve stem 6 is pressed down, The support spring 9 can realize the reciprocating motion by twitching the guide shaft 11 on the guide plate 10 , so that the pressure between the second fixed seat 12 and the annular seat 18 can be adjusted.

Further, a vent pipe 14 is connected to the side of the intake pipe joint 16, an exhaust valve 20 is installed on one side of the vent pipe 14, and a gas pressure gauge 15 is connected to the end of the vent pipe 14. To connect the intake pipe joint 16 to the inside of the device All the air pressure is released, and the air pressure can be discharged only by opening the exhaust valve 20 without lifting the valve stem 6, and the gas pressure gauge 15 is provided to facilitate the observation of the air pressure value inside the intake pipe joint 16.

Further, a sealing ring 13 is connected to the top edge of the annular seat 18, the sealing ring 13 and the second fixing seat 12 are in conical surface contact, and a sealing gasket 22 is connected to the bottom of the second fixing seat 12, and the sealing gasket 22 is located at the sealing surface. The top of the ring 13 has a better sealing effect.

Further, the top of the guide shaft 11 is provided with a limit block to prevent the guide shaft 11 from falling off the guide plate 10 .

Further, the bottom of the sealing end cover 21 is coaxially connected with a first sealing ring 7, the first sealing ring 7 is sleeved on the valve stem 6 and a sealing ring is arranged between the two, so that the sealing end cover 21 and the valve stem 6 The sealing effect between them is better.

Further, the top of the valve stem 6 is connected with a bar-shaped connecting seat 5, the bar-shaped connecting seat 5 is arranged horizontally, and the other end of the bar-shaped connecting seat 5 is provided with an adjusting screw 4, and the adjusting screw 4 runs through the bar-shaped connecting seat. 5 end, and at least one nut is connected to the adjusting screw 4; the adjusting screw 4 is arranged vertically downward, and the bottom of the adjusting screw 4 is connected to the side surface of the sealing shell 1 through the connecting seat 19.

As shown in Fig. 2, adjusting the nut on the top of the adjusting screw 4 can drive the bar-shaped connecting seat 5 to move downward, thereby changing the distance between the first fixing seat 8 and the second fixing seat 12, and gradually increasing the pressure of the support spring 9 , so that the pressure relief strength of the valve flap is increased, which is convenient for adjustment.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A safety valve, comprising a valve seat and a valve disc, characterized in that the valve seat comprises a sealing shell (1), the side of the sealing shell (1) is connected to an air outlet channel (2), and the top of the sealing shell (1) is coaxially connected The installation cylinder (3), the bottom of the sealing shell (1) is coaxially connected to the intake pipe joint (16), the inner bottom of the sealing shell (1) is provided with a sealing disc (17), the edge of the sealing disc (17) and the sealing shell (1) The inner walls are sealed and connected, an annular seat (18) is installed in the middle of the top surface of the sealing disc (17), and the annular seat (18) is communicated with the sealing disc (17); The valve disc comprises a second fixed seat (12) on the top of the annular seat (18), and the top edge of the second fixed seat (12) is connected with a plurality of vertically arranged and equally spaced guide shafts (11). The tops are all arranged through the edge of the guide plate (10), a valve stem (6) is vertically installed in the center of the top surface of the guide plate (10), and the valve stem (6) is coaxially connected to the first fixing seat (8), A support spring (9) is arranged between the first fixed seat (8) and the second fixed seat (12), the support spring (9) is sleeved on the valve stem (6) and the guide shaft (11), and the support spring ( The two ends of 9) are respectively set against the second fixing seat (12) and the second fixing seat (12); the top of the mounting cylinder (3) is screwed with a sealing end cover (21), and the valve stem (6) is The top is arranged through the center of the sealing end cover (21); The top of the valve stem (6) is connected with a bar-shaped connecting seat (5), the bar-shaped connecting seat (5) is arranged horizontally, and an adjusting screw (4) is arranged on the other end of the bar-shaped connecting seat (5), and the adjusting screw ( 4) running through the end of the bar-shaped connecting seat (5), and at least one nut is connected to the adjusting screw (4); The adjusting screw (4) is arranged vertically downward, and the bottom of the adjusting screw (4) is connected to the side surface of the sealing shell (1) through a connecting seat (19). 2. The safety valve according to claim 1, characterized in that a vent pipe (14) is connected to the side of the air inlet pipe joint (16), an exhaust valve (20) is installed on one side of the vent pipe (14), and the vent pipe (14) A gas pressure gauge (15) is connected to the end. 3. The safety valve according to claim 1, characterized in that a sealing ring (13) is connected to the top edge of the annular seat (18), and the sealing ring (13) and the second fixing seat (12) are in conical surface contact , a sealing gasket (22) is connected to the bottom of the second fixing seat (12), and the sealing gasket (22) is located on the top of the sealing ring (13). 4. The safety valve according to claim 1, characterized in that, the top of the guide shaft (11) is provided with a limit block. 5. The safety valve according to claim 1, characterized in that a first sealing ring (7) is coaxially connected to the bottom of the sealing end cover (21), and the first sealing ring (7) is sleeved on the valve stem (6) A sealing ring is arranged between the two.

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