A valve pressure regulating device controller

Abstract

The present invention discloses a valve pressure regulating device controller, comprising a first-stage valve body, an inner cavity of which is provided with a filter membrane, a first-stage valve seat, and first-stage upper and lower pistons, on which an upstream pressure interface communicating with the inner cavity is provided; a first-stage upper piston is on the first-stage valve seat and is used to connect or block the first-stage upper piston hole; a second-stage valve body, an inner cavity of which is provided with second-stage upper and lower pistons and a second-stage piston hole, on which a communicating pressure regulator middle cavity interface and an overflow port interface are provided, the overflow port interface being connected to the valve body middle cavity of the second-stage valve body; the valve body middle cavities of the first and second-stage valve bodies are connected through a flow channel, and an adjusting pin is provided on the second-stage lower piston, which moves up and down to block or connect the flow channel; the first-stage lower and upper pistons are interlocked with the second-stage upper and lower pistons. The present invention forms a two-stage pressure reducing structure through the first-stage upper piston, the first-stage valve seat, the second-stage lower piston, and the adjusting pin, thereby achieving two-stage pressure reduction of the medium, improving the pressure regulating range of the pressure regulating device, and having high control accuracy.

Description

Technical Field

[0001] The present invention relates to the field of pressure regulators, and in particular to a valve pressure regulating device controller. Background Art

[0002] A gas pressure regulator, commonly known as a pressure reducing valve or pressure reducing valve, automatically varies the gas flow through the regulating valve to maintain a specified outlet gas pressure. It is generally categorized into direct-acting and indirect-acting types. An indirect-acting pressure regulator, consisting of a main pressure regulator, a pilot, and an exhaust valve, is primarily used in high-pressure applications. Its primary operating principle is to utilize changes in outlet pressure, amplified by the pilot, to control the operation of the main valve.

[0003] Most controllers in the prior art use single-stage pressure regulation, which results in unstable outlet pressure. To address this issue, Chinese utility model patent CN210461829U provides a pressure-stabilizing controller for a gas pressure regulator, comprising a controller valve body, a pressure-stabilizing valve body disposed at the front end of the controller valve body, the controller valve body being provided with a controller air inlet port, a controller air outlet port, a pressure-regulating upper cover, a bottom cover, a controller pressure-regulating piston, an upper controller pressure-regulating diaphragm, a lower controller pressure-regulating diaphragm, a controller pressure-regulating spring, a controller closing spring, and a first feedback port; and a pressure-stabilizing valve body being provided with a pressure-stabilizing air inlet port, a pressure-stabilizing air outlet port, an upper valve cover, a lower valve cover, a filter, a pressure-stabilizing piston, a pressure-stabilizing diaphragm, a pressure-stabilizing spring, and a second feedback port, thereby forming a two-stage pressure reduction system and improving the stability of the pressure regulation system to a certain extent. However, the above-mentioned solution suffers from the problems of complex structure, difficult maintenance, low precision, a narrow applicable pressure range, and an inability to meet the control requirements of higher pressures.

[0004] In view of this, there is an urgent need to improve the voltage regulator controller in the prior art to simplify its structure, improve its control accuracy and application range, and meet the control requirements of higher pressures. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing voltage regulator controller has the problems of complex structure, difficult maintenance, low precision, small applicable pressure range, and failure to meet control requirements.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0007] A valve pressure regulating device controller, comprising:

[0008] A first-stage valve body, wherein a filter membrane, a first-stage valve seat, a first-stage upper piston, and a first-stage lower piston are provided in its inner cavity, and an upstream pressure interface communicating with its inner cavity is provided on its side surface; a first-stage upper piston hole is provided on the first-stage valve seat, and the first-stage upper piston is arranged to move up and down along the first-stage upper piston hole, and as it moves up and down, the first-stage upper piston hole is connected to or blocked from the valve body cavity of the first-stage valve body; the first-stage lower piston is arranged below the first-stage valve seat and is interlocked with the lower end of the first-stage upper piston;

[0009] The secondary valve body is provided with a communicating pressure regulator middle cavity interface and an overflow port interface, and a secondary upper piston, a secondary lower piston, and a secondary piston hole are provided in its inner cavity. The secondary lower piston is movably arranged up and down along the secondary piston hole of the secondary valve body, and the upper end of the secondary lower piston is interlocked with the secondary upper piston; the overflow port interface is in communication with the valve body middle cavity of the secondary valve body;

[0010] The valve body middle cavity of the first valve body and the valve body middle cavity of the second valve body are connected through a flow channel. The second lower piston is provided with an adjusting pin, which blocks or connects the flow channel as the second lower piston moves up and down.

[0011] In the above scheme, preferably, the pressure regulating device controller includes a base and a left shell top cover, a left shell, a right shell and a right shell top cover arranged on the base, the base and the left shell top cover and the left shell form the first-level valve body, and the base and the right shell and the right shell top cover form the second-level valve body.

[0012] In the above scheme, preferably, the lower cavity of the first-stage valve body is provided with a first downstream pressure interface, and the lower cavity of the second-stage valve body is provided with a second downstream pressure interface. The first downstream pressure interface and the second downstream pressure interface are connected in series and are connected to the downstream pressure through the downstream pressure interface.

[0013] In the above solution, preferably, the first-stage upper piston hole and the upper portion of the first-stage upper piston are conical.

[0014] In the above solution, preferably, the secondary lower piston is T-shaped and includes:

[0015] A vertical piston portion is arranged to move up and down along the secondary lower piston hole in the secondary valve body;

[0016] The horizontal piston part, the adjusting pin is arranged on the top surface of the horizontal piston part.

[0017] In the above solution, preferably, the first-stage lower piston is arranged below the first-stage valve seat, the lower end of the first-stage upper piston passes through the first-stage lower piston hole, and is locked with the first-stage lower piston through the first locking nut.

[0018] In the above solution, preferably, the upper end of the vertical piston portion is arranged to pass through the secondary piston hole and is locked with the secondary upper piston through a second locking nut.

[0019] In the above solution, preferably, the left housing top cover and the right housing top cover are detachably mounted on the left housing and the right housing by bolts.

[0020] Compared to existing technologies, the valve pressure regulator controller provided by the present invention utilizes a two-stage pressure reduction structure, with primary pressure reduction by the upper piston and valve seat and secondary pressure reduction by the adjusting pin. This ensures a stable pressure differential between the inlet and outlet of the secondary valve body, significantly extending the pressure regulation range of the pressure regulator controller. This invention offers a simple structure, easy installation, high sensitivity, and improved control accuracy of the pressure regulator controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic cross-section of the controller of the valve pressure regulating device of the present invention;

[0022] Figure 2 Schematic cross-section of the first-stage valve body of the present invention;

[0023] Figure 3 It is a cross-sectional schematic diagram of the secondary valve body in the present invention.

[0024] in, Figures 1 to 3 The corresponding relationship between the names of the components and the reference numerals is as follows:

[0025] Base 1, left shell cover 2, left shell 3, right shell 4, right shell cover 5,

[0026] Primary valve body 10, secondary valve body 20,

[0027] Filter membrane 101, first-stage valve seat 102, first-stage upper piston 103, first-stage lower piston 104, first locking nut 105, first downstream pressure interface 106, pressure stabilizing spring 107,

[0028] First level upper piston hole 1021,

[0029] First level lower piston hole 1041,

[0030] Secondary upper piston 201, secondary lower piston 202, secondary lower piston hole 203, second locking nut 204, command spring 205, adjustment pin 206, flow channel 207, second downstream pressure interface 208,

[0031] Secondary piston hole 2011,

[0032] Upstream pressure interface a, downstream pressure interface b, connection to the pressure regulator middle cavity interface c, overflow port interface d. DETAILED DESCRIPTION

[0033] The present invention provides a controller for a valve pressure regulating device. Adjustment pins disposed on the primary upper piston and the secondary lower piston within the primary and secondary valve bodies form a two-stage pressure-reducing structure, thereby improving the controller's control speed and accuracy. The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 、 Figure 2 and Figure 3 As shown, the valve pressure regulating device controller provided by the present invention includes a base 1 and a left shell top cover 2, a left shell 3, a right shell 4 and a right shell top cover 5 arranged on the base 1.

[0035] The base 1, the left housing cover 2, and the left housing 3 form a primary valve body 10. Within the interior of primary valve body 10 are located a filter membrane 101, a primary valve seat 102, a primary upper piston 103, and a primary lower piston 104. An upstream pressure port a is located on the side of the left housing cover 2, communicating with the interior of primary valve body 10. Filter membrane 101 is positioned beneath the left housing cover 2 to facilitate filtration of media entering primary valve body 10 through upstream pressure port a, preventing impurities in the media from causing wear and tear on components within the valve body.

[0036] The first-stage valve seat 102 is provided with a first-stage upper piston hole 1021, and the first-stage upper piston 103 is arranged in the first-stage upper piston hole 1021 and is movably arranged up and down along the first-stage upper piston hole 1021. The upper ends of the first-stage upper piston hole 1021 and the first-stage upper piston 103 are both tapered with a wide upper end and a narrow lower end.

[0037] The first-stage lower piston 104 is disposed below the first-stage valve seat 102 and is provided with a first-stage lower piston hole 1041. The lower end of the first-stage upper piston 103 extends through the first-stage lower piston hole 1041 and is locked to the first-stage lower piston 104 via a first locking nut 105. The first-stage upper piston 103 and the first-stage lower piston 104 are in sealed contact via a sealing ring.

[0038] The first-stage valve seat 102, the first-stage upper piston 103, and the first-stage lower piston 104 divide the interior of the first-stage valve body 10 into an upper, middle, and lower chambers. The upper and middle chambers of the first-stage valve body 10 are connected through the first-stage upper piston hole 1021. A first downstream pressure port 106 is provided at the lower end of the lower chamber of the first-stage valve body 10. A pressure-stabilizing spring 107 is also provided within the lower chamber of the first-stage valve body 10, mounted at the upper end of the first-stage upper piston 103.

[0039] The base 1, right housing 4, and right housing top cover 5 form a secondary valve body 20. A secondary upper piston 201 and a secondary lower piston 202 are provided within the secondary valve body 20. The secondary upper piston 201 is provided with a secondary piston hole 2011. The secondary lower piston 202 is T-shaped and includes a vertical piston portion and a horizontal piston portion. The vertical piston portion is arranged to move up and down along the secondary lower piston hole 203 within the secondary valve body 20. The upper end of the vertical piston portion is provided through the secondary piston hole 2011 and is locked to the secondary upper piston 201 via a second locking nut 204. A command spring 205 is provided above the secondary upper piston 201, and the command spring 205 abuts against the upper end of the secondary lower piston 202.

[0040] An adjusting pin 206 is installed on the top surface of the horizontal piston portion of the secondary lower piston 202. The secondary upper piston 201 and the secondary lower piston 202 divide the interior of the secondary valve body 20 into an upper valve chamber, a middle valve chamber, and a lower valve chamber. The upper valve chamber of the secondary valve body 20 is located above the secondary upper piston 201. A second locking nut 204 and a command spring 205 are located within the upper valve chamber of the secondary valve body 20. The middle valve chamber of the secondary valve body 20 communicates with the middle valve chamber of the primary valve body 10. A flow channel 207 is provided on the bottom surface of the middle valve chamber of the secondary valve body 20. The adjusting pin 206 blocks or opens the flow channel 207 as the secondary lower piston 202 moves up and down. The lower valve cavity of the secondary valve body 20 is arranged below the secondary lower piston 202. A second downstream pressure interface 208 is provided in the lower valve cavity of the secondary valve body 20. The first downstream pressure interface 106 and the second downstream pressure interface 208 are connected in series and connected to the downstream pressure through the downstream pressure interface b.

[0041] The right housing 4 is provided with a pressure regulator middle cavity interface c and an overflow port interface d, wherein the pressure regulator middle cavity interface c is in communication with the pressure regulator middle cavity, and the overflow port interface d is in communication with the flow channel 207 .

[0042] The left housing top cover 2 and the right housing top cover 5 are detachably mounted on the left housing 3 and the right housing 4 by bolts.

[0043] The working process of the present invention is as follows:

[0044] When the pressure regulating device controller is in use, the upstream pressure port a of the first valve body 10 is connected to the upstream pressure, the first downstream pressure port 106 and the second downstream pressure port 208 are connected in series, and are connected to the downstream pressure through the downstream pressure port b. The port c of the second valve body 20 connected to the pressure regulator's central cavity is connected to the pressure regulator's load chamber, and the port c of the second valve body 20 connected to the pressure regulator's central cavity communicates with the overflow port d.

[0045] During operation, upstream pressure enters the primary valve body 10 through the upstream pressure port a, passes through the filter membrane 101, and enters the upper valve chamber of the primary valve body. At this point, under the action of the pressure-stabilizing spring 107, the primary upper piston 103 is in the open position. The upstream pressure enters the valve chamber of the primary valve body 10 through the gap between the primary upper piston 103 and the primary valve seat 102. The valve chamber of the primary valve body 10 communicates with the valve chamber of the secondary valve body 20. The upstream pressure enters the valve chamber of the secondary valve body 20, where it is reduced in pressure by the primary upper piston 103, the primary valve seat 102, and the adjusting pin 31. It then enters the pressure regulator's load chamber through the pressure regulator's central chamber port c. The downstream pressure from the pressure regulating device controller enters the lower valve chambers of the primary valve body 10 and the lower valve chambers of the secondary valve body 20 through the downstream pressure port b.

[0046] When the downstream pressure decreases, the force of the downstream pressure on the secondary lower piston 7 decreases accordingly. Under the action of the command spring 205 and the upstream pressure, the secondary lower piston 7 opens, the pressure at the overflow port interface d increases, and the pressure in the load chamber of the pressure regulator connected to the middle chamber interface c of the pressure regulator increases. The increased pressure at the middle chamber interface c of the pressure regulator controls the opening of the pressure regulator main valve, thereby keeping the downstream pressure stable.

[0047] On the contrary, when the downstream pressure rises to a level exceeding the force of the command spring 205 and the upstream pressure, the secondary lower piston 202 rises under the action of the downstream pressure, the adjusting pin 31 fits against the flow channel 207, sealing the flow channel 207, and the pressure regulating device controller is closed.

[0048] During use, the forces at both ends of the first-stage lower piston 104 of the first-stage valve body 10 are balanced with each other. Therefore, at the upstream pressure interface a of the first-stage valve body 10, the upstream pressure is equal to the sum of the downstream pressure of the downstream pressure interface b and the force of the pressure-stabilizing spring 107. Therefore, the pressure entering the second-stage valve body 20 from the first-stage valve body 10 will be automatically adjusted according to the size of the downstream pressure, so that the pressure difference of the controller is always consistent, thereby improving the stability of the entire pressure regulation system.

[0049] Compared with the prior art, the valve pressure regulating device controller provided by the present invention forms a two-stage pressure reducing structure through the first-stage upper piston and the first-stage pressure reducing of the valve seat and the second-stage pressure reducing of the regulating pin, so that the pressure difference between the inlet and outlet of the secondary valve body is always kept stable, which greatly improves the pressure regulation range of the pressure regulating device controller. In the present invention, according to the change of downstream pressure, the downstream pressure acts on the secondary piston, and by controlling the rise or fall of the secondary piston, the regulating pin is fitted or opened with the flow channel, and the controller is closed or opened. It has a high response sensitivity and improves the control speed and control accuracy of the pressure regulating device controller. The present invention has a simple structure and is easy to install. It can be widely used in axial flow check valves and regulating valves, and has the advantages of a wide range of applications and a wide range of application fields.

[0050] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the scope of protection of the present invention.

Claims

1. A valve pressure regulating device controller, characterized in that: include: A first-stage valve body, wherein a filter membrane, a first-stage valve seat, a first-stage upper piston, and a first-stage lower piston are provided in its inner cavity, and an upstream pressure interface communicating with its inner cavity is provided on its side surface; a first-stage upper piston hole is provided on the first-stage valve seat, and the first-stage upper piston is arranged to move up and down along the first-stage upper piston hole, and as it moves up and down, the first-stage upper piston hole is connected to or blocked from the valve body cavity of the first-stage valve body; the first-stage lower piston is arranged below the first-stage valve seat and is interlocked with the lower end of the first-stage upper piston; The secondary valve body is provided with a communicating pressure regulator middle cavity interface and an overflow port interface, and a secondary upper piston, a secondary lower piston, and a secondary piston hole are provided in its inner cavity. The secondary lower piston is movably arranged up and down along the secondary piston hole of the secondary valve body, and the upper end of the secondary lower piston is interlocked with the secondary upper piston; the overflow port interface is in communication with the valve body middle cavity of the secondary valve body; The valve body middle cavity of the first valve body and the valve body middle cavity of the second valve body are connected through a flow channel, and an adjusting pin is provided on the second lower piston, which blocks or connects the flow channel as the second lower piston moves up and down; The secondary lower piston is T-shaped and includes: A vertical piston portion is arranged to move up and down along the secondary lower piston hole in the secondary valve body; a horizontal piston portion, wherein the adjusting pin is arranged on a top surface of the horizontal piston portion; The first-stage lower piston is arranged below the first-stage valve seat, and the lower end of the first-stage upper piston passes through the first-stage lower piston hole and is locked with the first-stage lower piston through a first locking nut.

2. The valve pressure regulating device controller according to claim 1, characterized in that: The pressure regulating device controller includes a base and a left shell top cover, a left shell, a right shell and a right shell top cover arranged on the base. The base, the left shell top cover and the left shell form the first-level valve body, and the base, the right shell and the right shell top cover form the second-level valve body.

3. The valve pressure regulating device controller according to claim 1, characterized in that: The lower cavity of the first-stage valve body is provided with a first downstream pressure interface, and the lower cavity of the second-stage valve body is provided with a second downstream pressure interface. The first downstream pressure interface and the second downstream pressure interface are connected in series and are connected to the downstream pressure through the downstream pressure interface.

4. The valve pressure regulating device controller according to claim 1, characterized in that: The first-stage upper piston hole and the upper portion of the first-stage upper piston are tapered.

5. The valve pressure regulating device controller according to claim 1, characterized in that: The upper end of the vertical piston portion passes through the secondary piston hole and is locked with the secondary upper piston through a second locking nut.

6. The valve pressure regulating device controller according to claim 2, characterized in that: The left housing top cover and the right housing top cover are detachably mounted on the left housing and the right housing by bolts.

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