A piston type self-closing pressure regulator

Abstract

The present invention provides a piston type self-closing pressure regulator, comprising an air intake pipe, wherein a pressure regulating mechanism is arranged in the air intake pipe, and when the pressure regulating mechanism has a problem and needs to be replaced or repaired, the entire air intake pipe can be disassembled for replacement or repair, thereby reducing the difficulty of repair; a shaft sleeve, an air intake member and a pressure regulating assembly are arranged in the air intake pipe, and the pressure regulating assembly comprises a conical sealing member, a piston member, a movable rod, a first spring, an adjusting member, a second spring, a fixing member, a first connecting rod, a second connecting rod and a third connecting rod; when the intake pressure increases, the piston member is pushed to move toward the valve body, and the conical sealing member is driven to approach the intake passage, thereby reducing the intake amount; when the intake pressure decreases, the conical sealing member can be driven away from the intake passage under the action of the spring, thereby increasing the intake amount, thereby realizing automatic adjustment of the intake pressure; the pressure can be adjusted according to different intake pressure conditions by means of the arranged first spring or second spring, thereby reducing the use cost for the user.

Description

Technical Field

[0001] The invention relates to the technical field of valve pressure regulation, in particular to a piston type self-closing pressure regulator. Background Art

[0002] The self-closing valve is a device installed on the pipeline of a low-pressure gas system. When the pipeline gas supply pressure is under-pressure or over-pressure, it can automatically close without electricity or other external power and must be opened manually. The current pressure regulating mechanism of the self-closing valve is installed inside the valve body. When the pressure regulating mechanism fails, the valve body needs to be completely disassembled for repair and maintenance, resulting in reduced maintenance efficiency. On the other hand, the existing pressure regulating mechanism is basically only suitable for a certain intake flow rate and cannot be adjusted to meet the usage needs of different people. Summary of the invention

[0003] In view of this, the present invention proposes a piston-type self-closing pressure regulator, which is arranged in the intake pipe and is convenient for disassembly and assembly for repair and maintenance. At the same time, it can be suitable for different intake flow rates by adjusting the tightness of the spring.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A piston type self-closing pressure regulator, comprising an air inlet pipe connected to a valve body, and further comprising:

[0006] A shaft sleeve, the shaft sleeve is arranged in the air inlet pipe and forms an air outlet passage with the inner wall of the air inlet pipe, and the shaft sleeve is provided with an air outlet hole connected with the air outlet passage;

[0007] An air intake member, which extends from the outside of the air intake pipe to the inside and is connected to the shaft sleeve, and includes an air intake channel and a pressure regulating chamber, and the air intake channel is connected to the inside of the shaft sleeve through the pressure regulating chamber;

[0008] A pressure regulating assembly, the pressure regulating assembly comprising a conical seal, a piston, a movable rod, a first spring, an adjusting member, a second spring, a fixing member, and a first connecting rod, a second connecting rod and a third connecting rod hinged in sequence head to tail, the conical seal being located in the pressure regulating chamber and being hinged to one end of the first connecting rod, the middle of the second connecting rod being hinged to the air inlet member, one end of the third connecting rod being hinged to the piston, one end of the movable rod being connected to the piston, the other end of the movable rod passing through the first spring, the adjusting member, the second spring and the fixing member in sequence, and being slidably connected to the adjusting member and the fixing member, the two ends of the first spring being in contact with the piston and the adjusting member respectively, the two ends of the second spring being in contact with the adjusting member and the fixing member respectively, and the adjusting member passing through the fixing member; a cylindrical boss being arranged on the outer surface of the movable rod, the first spring being sleeved on the outside of the cylindrical boss

[0009] Preferably, the pressure regulating assembly further comprises a latch, which passes through the middle portion of the second connecting rod and is hinged to the air inlet member.

[0010] Preferably, the air inlet member is provided with a fixing plate extending in the air inlet direction, the fixing plate is provided with a mounting hole, and the latch passes through the mounting hole.

[0011] Preferably, the piston member is provided with a threaded hole, one end of the movable rod connected to the piston member is provided with an external thread, and the movable rod is threadedly connected to the threaded hole.

[0012] Preferably, an annular groove is provided on the outer surface of the piston, and a sealing rubber ring is provided at the annular groove.

[0013] Preferably, it further comprises an air intake rubber ring, which is arranged on the portion of the air intake member located outside the air intake pipe.

[0014] Preferably, the air inlet pipe comprises a handle and an outer shell, the handle is arranged outside the sleeve, the outer shell is threadedly connected to the outer wall of the sleeve, and the outer wall of the sleeve and the inner wall of the outer shell form an air outlet channel.

[0015] Preferably, the outer wall of the sleeve is provided with an annular protrusion, the annular protrusion is provided with an external thread, the inner wall of the outer shell is provided with an internal thread, and the outer shell is threadedly connected to the annular protrusion.

[0016] Preferably, an end of the outer shell away from the annular protrusion is provided with an external thread.

[0017] Preferably, the pressure regulating assembly further comprises a cylindrical pin, which is arranged at a hinge between the conical seal and the first connecting rod, a hinge between the first connecting rod and the second connecting rod, a hinge between the second connecting rod and the third connecting rod, and a hinge between the third connecting rod and the piston member.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a piston-type self-closing pressure regulator, which is arranged in an intake pipe. If a problem occurs with the pressure regulating component and needs to be replaced or repaired, the intake pipe can be directly disassembled for replacement or repair, thereby reducing the difficulty and cost of repair. When the intake pressure increases, the piston member will be pushed along the intake direction, and drive the third connecting rod, the second connecting rod and the first connecting rod that are hinged in sequence to move, so that the conical sealing member connected to the first connecting rod moves in the opposite direction of the intake direction, thereby reducing the intake flow rate and realizing the pressure regulating function. The first spring and the second spring that are arranged can be used under different intake pressure conditions and can be suitable for the intake flow rate requirements of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of a piston-type self-closing pressure regulator of the present invention;

[0022] Figure 2 It is a cross-sectional view of a piston-type self-closing pressure regulator of the present invention;

[0023] Figure 3 An exploded view of a piston-type self-closing pressure regulator of the present invention;

[0024] In the figure, 1 is an air inlet pipe, 2 is a sleeve, 3 is an air outlet channel, 4 is an air outlet hole, 5 is an air inlet member, 6 is an air inlet channel, 7 is a pressure regulating chamber, 8 is a conical sealing member, 9 is a piston member, 10 is a movable rod, 11 is a first spring, 12 is an adjusting member, 13 is a second spring, 14 is a fixing member, 15 is a first connecting rod, 16 is a second connecting rod, 17 is a third connecting rod, 18 is a cylindrical boss, 19 is a latch, 20 is a fixing plate, 21 is a mounting hole, 22 is an annular groove, 23 is an air inlet rubber ring, 24 is a handle, 25 is an outer shell, 26 is an annular protrusion, and 27 is a cylindrical pin. DETAILED DESCRIPTION

[0025] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0026] See also Figures 1 to 3 The present invention provides a piston-type self-closing pressure regulator, comprising an air inlet pipe 1 connected to a valve body, and further comprising:

[0027] A shaft sleeve 2, wherein the shaft sleeve 2 is arranged in the air inlet pipe 1 and forms an air outlet passage 3 with the inner wall of the air inlet pipe 1, and an air outlet hole 4 communicating with the air outlet passage 3 is arranged on the shaft sleeve 2;

[0028] An air intake member 5, the air intake member 5 extends from the outside of the air intake pipe 1 to the inside and is connected to the shaft sleeve 2, the air intake member 5 includes an air intake channel 6 and a pressure regulating chamber 7, and the air intake channel 6 is connected to the inside of the shaft sleeve 2 through the pressure regulating chamber 7;

[0029] The pressure regulating assembly includes a conical seal 8, a piston 9, a movable rod 10, a first spring 11, an adjusting member 12, a second spring 13, a fixing member 14, and a first connecting rod 15, a second connecting rod 16 and a third connecting rod 17 which are hinged in sequence head to tail. The conical seal 8 is located in the pressure regulating chamber 7 and is hinged to one end of the first connecting rod 15. The middle of the second connecting rod 16 is hinged to the air inlet 5. One end of the third connecting rod 17 is hinged to the piston 9. One end of the movable rod 10 is hinged to the piston 9, and the other end passes through the first spring 11, the adjusting member 12, the second spring 13 and the fixing member 14 in sequence, and is slidably connected with the adjusting member 12 and the fixing member 14. The two ends of the first spring 11 are respectively in contact with the piston member 9 and the adjusting member 12, and the two ends of the second spring 13 are respectively in contact with the adjusting member 12 and the fixing member 14, and the adjusting member 12 passes through the fixing member 14; the outer surface of the movable rod 10 is provided with a cylindrical boss 18, and the first spring 11 is sleeved on the outside of the cylindrical boss 18

[0030] A piston-type self-closing pressure regulator of the present invention is used in an air intake pipe 1 of a self-closing valve. The air intake pipe 1 and the valve body of the self-closing valve are detachably connected. Therefore, when the self-closing valve fails to regulate pressure, the air intake pipe 1 can be directly removed for replacement or repair and maintenance. Compared with the traditional method of setting a pressure regulating mechanism inside the valve body, the repair difficulty is reduced and the repair and maintenance cost is reduced.

[0031] During normal use, external gas enters the interior of the sleeve 2 through the air inlet channel 6 of the air inlet member 5 and the pressure regulating chamber 7, and is transported to the air outlet channel 3 through the air outlet hole 4 on the sleeve 2, and is transported from the air outlet channel 3 to the interior of the valve body, thereby realizing normal transportation of the gas. The piston member 9 is always located behind the air outlet hole 4 during the entire use process and will not block the air outlet hole 4.

[0032] The present invention can be applied to a variety of intake pressure conditions. When the intake pressure is high pressure, the regulating member 12 is not in contact with the cylindrical boss 18. At this time, the high-pressure gas will push the piston member 9 to move significantly to the right. The elastic force of the first spring 11 is greater than the elastic force of the second spring 13. The regulating member 12 is pushed to move to the right synchronously by the elastic force of the first spring 11, so that the second spring 13 is fully compressed. At this time, the first spring 11 plays a regulating role. When the intake flow rate increases, the gas pushes the piston member 9 to move in the intake direction. During the movement, the piston member 9 will drive the third connecting rod 17 to rotate. Since the first connecting rod 15, the second connecting rod 16 and the third connecting rod 17 are hinged head to tail in sequence, and the middle part of the second connecting rod 16 is hinged to the intake member 5, when the piston member 9 moves to the right, the first The connecting rod 15, the second connecting rod 16 and the third connecting rod 17 will be stretched as a whole, so that the conical seal 8 moves to the left and gradually approaches the intake channel 6. The conical surface of the conical seal 8 is arranged opposite to the intake channel 6. When the conical seal 8 is inserted into the intake channel 6, the intake flow rate can be limited, thereby reducing the flow entering the inside of the sleeve 2; when the intake flow rate decreases, under the elastic force of the first spring 11, the piston member 9 moves to the left and drives the third connecting rod 17 to rotate, so that the first connecting rod 15, the second connecting rod 16 and the third connecting rod 17 are retracted as a whole, so that the distance between the left side of the first connecting rod 15 and the right side of the third connecting rod 17 is reduced, and the conical seal 8 is driven to move to the right away from the intake channel 6, so that the intake flow rate can be increased, and pressure regulation under high pressure conditions can be achieved.

[0033] When the intake pressure is low, adjust the length of the movable rod 10 extending into the piston member 9, and make the first spring 11 in a fully extended state. At this time, the piston member 9 and the adjusting member 12 are not in contact with the cylindrical step. The pressure adjustment process is controlled by the second spring 13. The piston member 9, the movable rod 10, the first spring 11 and the adjusting member 12 can be regarded as a whole. When the intake pressure increases, the piston member 9, the movable rod 10, the first spring 11 and the adjusting member 12 are pushed to the right and squeeze the second spring 13. The piston member 9 drives the third connecting rod 17 to rotate, so that the conical seal 8 closes the intake channel 6 and reduces the intake volume. When the intake volume decreases, under the elastic force of the second spring 13, the piston member 9 moves to the left and drives the third connecting rod 17 to rotate, so that the conical seal 8 is away from the intake channel 6, the intake volume is increased, and the pressure adjustment under low pressure is achieved.

[0034] A plurality of grooves are provided on the conical sealing member 8 for the gas to pass through.

[0035] Preferably, the pressure regulating assembly further comprises a latch 19, wherein the latch 19 passes through the middle of the second connecting rod 16 and is hinged to the air intake member 5, wherein the air intake member 5 has a fixing plate 20 extending in the air intake direction, wherein the fixing plate 20 is provided with a mounting hole 21, and the latch 19 passes through the mounting hole 21.

[0036] During the voltage regulation process of the voltage regulator of the present invention, the second connecting rod 16 rotates with the latch pin 19 as the axis.

[0037] Preferably, the piston member 9 is provided with a threaded hole (not shown in the figure), one end of the movable rod 10 connected to the piston member 9 is provided with an external thread, and the movable rod 10 is threadedly connected to the threaded hole.

[0038] The movable rod 10 is threadedly connected to the piston member 9, and the length of the movable rod 10 inside the threaded hole can be adjusted to adapt to different intake pressure conditions.

[0039] Preferably, an annular groove 22 is provided on the outer surface of the piston member 9 , and a sealing rubber ring (not shown in the figure) is provided at the annular groove 22 .

[0040] The sealing rubber ring can prevent the gas from leaking from the outer surface of the piston member 9.

[0041] Preferably, it further comprises an air intake rubber ring 23 , which is arranged on a portion of the air intake member 5 located outside the air intake pipe 1 .

[0042] The air intake rubber ring 23 is used to connect with the fuel gas source to prevent air intake leakage.

[0043] Preferably, the air inlet pipe 1 includes a handle 24 and an outer shell 25, the handle 24 is sleeved on the outside of the sleeve 2, the outer shell 25 is threadedly connected to the outer wall of the sleeve 2, the outer wall of the sleeve 2 and the inner wall of the outer shell 25 form an air outlet channel 3, the outer wall of the sleeve 2 is provided with an annular protrusion 26, the annular protrusion 26 is provided with an external thread, the inner wall of the outer shell 25 is provided with an internal thread, the outer shell 25 is threadedly connected to the annular protrusion 26, and the end of the outer shell 25 away from the annular protrusion 26 is provided with an external thread.

[0044] The outer shell 25 is threadedly connected to the sleeve 2 for easy assembly. During the transportation process, the gas will enter the gas outlet channel 3 from the inside of the sleeve 2 through the gas outlet hole 4, and the other end of the outer shell 25 is threadedly connected to the valve body, so that the gas outlet channel 3 is connected to the inside of the valve body, and the gas can enter the inside of the valve body through the gas outlet channel 3.

[0045] Preferably, the pressure regulating assembly also includes a cylindrical pin 27, which is arranged at the hinge between the conical seal 8 and the first connecting rod 15, the hinge between the first connecting rod 15 and the second connecting rod 16, the hinge between the second connecting rod 16 and the third connecting rod 17, and the hinge between the third connecting rod 17 and the piston member 9.

[0046] The cylindrical pin 27 can realize the hinge connection between the three connecting rods, and the hinge connection between the connecting rod and the conical sealing member 8 and the piston member 9.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A piston-type self-closing pressure regulator, comprising an air inlet pipe connected to a valve body, characterized in that: Also includes: A shaft sleeve, the shaft sleeve is arranged in the air inlet pipe and forms an air outlet passage with the inner wall of the air inlet pipe, and the shaft sleeve is provided with an air outlet hole connected with the air outlet passage; An air intake member, which extends from the outside of the air intake pipe to the inside and is connected to the shaft sleeve, and includes an air intake channel and a pressure regulating chamber, and the air intake channel is connected to the inside of the shaft sleeve through the pressure regulating chamber; A pressure regulating assembly, the pressure regulating assembly comprising a conical seal, a piston, a movable rod, a first spring, an adjusting member, a second spring, a fixing member, and a first connecting rod, a second connecting rod and a third connecting rod which are hinged in sequence head to tail, the conical seal is located in the pressure regulating chamber and is hinged to one end of the first connecting rod, the middle of the second connecting rod is hinged to the air inlet member, one end of the third connecting rod is hinged to the piston, one end of the movable rod is connected to the piston, and the other end passes through the first spring, the adjusting member, the second spring and the fixing member in sequence, and is slidably connected to the adjusting member and the fixing member, the two ends of the first spring are in contact with the piston and the adjusting member respectively, the two ends of the second spring are in contact with the adjusting member and the fixing member respectively, and the adjusting member passes through the fixing member; a cylindrical boss is provided on the outer surface of the movable rod, and the first spring is sleeved on the outside of the cylindrical boss; The pressure regulating assembly further comprises a latch, which passes through the middle portion of the second connecting rod and is hinged to the air inlet member; The piston member is provided with a threaded hole, one end of the movable rod connected to the piston member is provided with an external thread, and the movable rod is threadedly connected to the threaded hole.

2. A piston-type self-closing pressure regulator according to claim 1, characterized in that: The air inlet member is provided with a fixing plate extending in the air inlet direction, the fixing plate is provided with a mounting hole, and the latch passes through the mounting hole.

3. A piston-type self-closing pressure regulator according to claim 1, characterized in that: An annular groove is arranged on the outer surface of the piston, and a sealing rubber ring is arranged at the annular groove.

4. A piston-type self-closing pressure regulator according to claim 1, characterized in that: It also includes an air intake rubber ring, which is arranged on a portion of the air intake member located outside the air intake pipe.

5. A piston-type self-closing pressure regulator according to claim 1, characterized in that: The air inlet pipe comprises a handle and an outer shell, wherein the handle is arranged outside the shaft sleeve, the outer shell is threadedly connected to the outer wall of the shaft sleeve, and the outer wall of the shaft sleeve and the inner wall of the outer shell form an air outlet channel.

6. A piston-type self-closing pressure regulator according to claim 5, characterized in that: The outer wall of the shaft sleeve is provided with an annular protrusion, the annular protrusion is provided with an external thread, the inner wall of the outer shell is provided with an internal thread, and the outer shell is threadedly connected with the annular protrusion.

7. A piston-type self-closing pressure regulator according to claim 6, characterized in that: An end of the outer shell away from the annular protrusion is provided with an external thread.

8. A piston-type self-closing pressure regulator according to claim 1, characterized in that: The pressure regulating assembly also includes a cylindrical pin, which is arranged at the hinge between the conical seal and the first connecting rod, the hinge between the first connecting rod and the second connecting rod, the hinge between the second connecting rod and the third connecting rod, and the hinge between the third connecting rod and the piston.

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