Multifunctional medium supply system

Abstract

The invention relates to the technical field of supply systems, in particular to a multifunctional medium supply system which mainly solves the technical problem that an existing supply system is narrow in application range. The system comprises a gas supply device, a medium storage device and a pump supply device, gas extrusion supply can be achieved through a main gas path, a branch gas path I, a storage tank, a gas extrusion supply branch and a supply main path, and extrusion gas with accurate pressure can be supplied through closed-loop control formed by a controllable pressure reducer I and a pressure sensor I; the storage tank is suitable for occasions with small pressure and high precision requirements, and meanwhile the flow requirements of different occasions can be met through the multiple storage tanks arranged in series; pump supply can be achieved through the pump supply branch and the supply trunk, the working precision of the proportioning valve can be guaranteed through closed-loop control formed by the controllable pressure reducer II and the pressure sensor II, and the system is suitable for occasions with large pressure. Therefore, the system can be suitable for various occasions with different requirements, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of supply systems, and in particular to a multifunctional medium supply system. Background Art

[0002] In the fields of aerospace and navigation, a specific supply system is required to provide a working medium with a certain pressure and flow rate to the test object (such as a pump, valve, engine, etc.) to verify the working performance of the test object or adjust the performance parameters of the test object as required.

[0003] At present, the supply system generally adopts independent pump supply or air extrusion supply, and can only adapt to certain specific requirements of the test piece for the working medium. The scope of application is relatively narrow. When the test piece's demand indicators for the working medium (such as pressure, flow, dosage, accuracy, etc.) change, a new supply system needs to be developed. Therefore, there is an urgent need to develop a multifunctional medium supply system with a wide range of uses. Summary of the Invention

[0004] In order to overcome the technical defect of the existing supply system in that the scope of application is relatively narrow, the present invention provides a multifunctional medium supply system.

[0005] The multifunctional medium supply system provided by the present invention comprises: A gas supply device, comprising a main gas circuit, the input end of the main gas circuit being connected to a gas source, the main gas circuit being connected in series with a gas circuit valve, the output end of the main gas circuit being connected to a branch gas circuit I and a branch gas circuit II, the branch gas circuit I being connected in series with a controllable pressure reducer I and a pressure sensor I along the direction of airflow, the output end of the branch gas circuit I being connected to a plurality of control branches, each of which being connected in series with a control valve, the output end of the branch gas circuit I being further provided with a pressure relief branch gas circuit I, the pressure relief branch gas circuit I being connected in series with a pressure relief valve I, and the branch gas circuit II being connected in series with a controllable pressure reducer II and a pressure sensor II along the direction of airflow; A medium storage device includes a plurality of storage tanks arranged in series with isolation valves connected in series between adjacent storage tanks, the plurality of storage tanks corresponding one to one and adjacent to the plurality of control branches, and the input end of each storage tank connected to the output end of the corresponding control branch; The pump supply device includes an air supply branch, a pump supply branch, a supply trunk, a return path, and a flow path. The input end of the air supply branch is connected to the output end of the tail end storage tank. The air supply branch is connected in series with a shut-off valve I. The input end of the pump supply branch is used to connect to a working medium source. The pump supply branch is connected in series with a shut-off valve II, a pump, and an air-controlled proportional control valve in the fluid direction. The control interface of the air-controlled proportional control valve is connected to the output end of the branch II, and the return port is connected to the input end of the head end storage tank. The output ends of the gas displacement supply branch and the pump supply branch are both connected to the input end of the supply trunk line. The supply trunk line is sequentially connected in series with a test valve, a pressure sensor III and a flow meter along the fluid direction. The output end of the supply trunk line is used to connect to the medium inlet of the test piece. The input end of the reflux line is used to connect to the medium outlet of the test piece and the output end is connected to the input end of the head end storage tank. The input end of the flow transmission line is used to connect to the working medium source and the output end is connected between the stop valve II and the pump. The flow transmission line is provided with a stop valve III.

[0006] Optionally, the output end of the main gas circuit is also connected to a branch gas circuit III, and the branch gas circuit III is connected in series with a pressure reducer. The controllable pressure reducer I and the controllable pressure reducer II are both air-controlled pressure reducers, and the output end of the branch gas circuit III is connected to the control interface of the controllable pressure reducer I and the control interface of the controllable pressure reducer II.

[0007] Optionally, a pressure relief branch II is provided at the output end of the branch gas path II, and a pressure relief valve II is connected in series to the pressure relief branch II.

[0008] Optionally, the air circuit valve, control valve, isolation valve, test valve and pressure relief valve are all air-controlled ball valves and are all connected to the output end of the branch air circuit III.

[0009] Optionally, both the output end of the pressure reducer and the output end of the air-controlled proportional regulating valve are connected in series with an accumulator.

[0010] Optionally, the pump is a high-pressure plunger pump, and the reflux port of the high-pressure plunger pump is connected to the input end of the head-end storage tank.

[0011] Optionally, the main gas circuit, the control branch circuit and the reflux port of the high-pressure plunger pump are all provided with safety valves.

[0012] Optionally, the output end of the air circuit valve, the input end of the pump and the input end of the test valve are all connected in series with filters.

[0013] Optionally, both the supply trunk line and the return line are equipped with a radiator.

[0014] Optionally, the pneumatic proportional control valve includes: The valve housing is a cylindrical structure with a mounting port formed at one end and an overflow port formed at the other end. The side wall of the valve housing is provided with two coaxially arranged connecting ports, the axes of the connecting ports intersecting and perpendicular to the axis of the cylindrical structure; a valve cover, which is sealed and fixed to the mounting port and is provided with a control air inlet communicating with the inner cavity of the valve housing; The valve core is placed in the inner cavity of the valve housing. The valve core is in the shape of a stepped shaft, and the large-diameter shaft section is close to the valve cover, and the small-diameter shaft section is away from the valve cover. The large-diameter shaft section is slidably sealed on the inner wall of the valve housing and forms a control air cavity between the large-diameter shaft section and the valve cover. The free end of the small-diameter shaft section is set to be conical and used to insert into the overflow port. The stepped surface formed by the large-diameter shaft section and the small-diameter shaft section serves as a pressure surface and is located on the same side of the connecting port as the valve cover.

[0015] The technical solution provided by the present invention has the following advantages compared with the prior art: The multifunctional medium supply system provided by the present invention can realize gas extrusion substitute supply through the main gas line, branch gas line I, storage tank, gas extrusion substitute supply branch and supply trunk line, and can supply gas extrusion substitute with precise pressure through the closed-loop control formed by the controllable pressure reducer I and the pressure sensor I, which is suitable for occasions with low pressure and high precision requirements. At the same time, it can meet the flow requirements of different occasions through multiple storage tanks arranged in series; pump supply can be realized through the pump supply branch and supply trunk line, and the closed-loop control formed by the controllable pressure reducer II and the pressure sensor II can ensure the working accuracy of the proportional control valve, so that the pump can provide stable pressure and flow, which is suitable for occasions with high pressure. In this way, the system can meet the different needs of various occasions, has a wide range of applications, and has high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram showing a multifunctional medium supply system according to an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a pneumatic proportional control valve according to an embodiment of the present invention is shown; Figure 3 A top view of a pneumatic proportional control valve according to an embodiment of the present invention is shown; Figure 4 A schematic diagram showing the cross-sectional structure of a valve housing according to an embodiment of the present invention; Figure 5 It shows a front view of the valve housing in an embodiment of the present invention; Figure 6 express Figure 5 Cross-sectional view at AA in the middle; Figure 7 A left side view of the valve housing according to an embodiment of the present invention is shown; Figure 8 A top view of a valve housing according to an embodiment of the present invention is shown; Figure 9 A schematic diagram showing the cross-sectional structure of a valve cover according to an embodiment of the present invention; Figure 10 A schematic diagram of the cross-sectional structure of the valve core in an embodiment of the present invention is shown.

[0019] In the picture: 100. Gas supply device; 110, main gas line; 111, gas line valve; 112, safety valve I; 113, filter I; 114, pressure gauge I; 120. Branch circuit I; 121. Controllable pressure reducer I; 122. Pressure sensor I; 130. Branch circuit II; 131. Controllable pressure reducer II; 132. Pressure sensor II; 140. Branch line III; 141. Pressure reducer; 142. Pressure gauge II; 143. Accumulator I; 150, control branch I; 151, control valve I; 152, pressure gauge III; 153, safety valve II; 160. Control branch II; 161. Control valve II; 162. Pressure gauge IV; 163. Safety valve III; 170, pressure relief shunt I; 171, pressure relief valve I; 180, pressure relief shunt II; 181, pressure relief valve II; 200, medium storage device; 210, storage tank I; 220, storage tank II; 230, liquid level gauge I; 240, liquid level gauge II; 250, isolation valve; 300, pump supply device; 310, gas extrusion supply branch; 311, stop valve I; 320, pump supply branch; 321, stop valve II; 322, filter II; 323, pump; 324, pressure gauge V; 325, air-controlled proportional control valve; 326, accumulator II; 327, safety valve IV; 328, check valve I; 330, supply main; 331, filter III; 332, test valve; 333, radiator I; 334, pressure sensor III; 335, flow meter; 340, return line; 341, radiator II; 342, one-way valve II; 350, flow path; 351, stop valve III; The structural components of the air-controlled proportional control valve 325 are described as follows: 1. Valve housing; 1.1. Installation port; 1.2. Overflow port; 1.3. Connection port; 1.4. Connecting pipe; 1.4.1. Connection flange; 1.4.2. Connection hole; 1.4.3. First sealing ring; 1.5. Annular groove; 1.5.1. Avoidance gap; 1.6. Pressure block; 1.7. Communication hole; 1.8. Pipe joint; 1.9. Mounting seat; 2. Valve cover; 2.1. Control air inlet; 2.2. Second sealing ring; 2.3. Block; 2.4. Positioning groove; 3. Valve core; 3.1. Large diameter shaft section; 3.2. Small diameter shaft section; 3.3. Control air cavity; 3.4. Third sealing ring; 3.5. Extended shaft section; 3.6. Fourth sealing ring. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The following combination Figures 1 to 10 Specific embodiments of the present invention are described in detail.

[0023] This embodiment provides a multifunctional medium supply system, including a gas supply device 100 , a medium storage device 200 , and a pump supply device 300 .

[0024] Among them, the gas supply device 100 includes a main gas circuit 110, the input end of the main gas circuit 110 is used to connect to the gas source, the main gas circuit 110 is connected in series with a gas circuit valve 111, the output end of the main gas circuit 110 is connected to a branch gas circuit I120 and a branch gas circuit II130, the branch gas circuit I120 is connected in series with a controllable pressure reducer I121 and a pressure sensor I122 along the air flow direction, the output end of the branch gas circuit I120 is connected to multiple control branches, each control branch is connected in series with a control valve, the output end of the branch gas circuit I120 is also provided with a pressure relief branch I170, the pressure relief branch I170 is connected in series with a pressure relief valve I171, and the branch gas circuit II130 is connected in series with a controllable pressure reducer II131 and a pressure sensor II132 in sequence along the air flow direction.

[0025] Specifically, main gas line 110 is serially connected along the airflow direction to a gas line valve 111, a safety valve 1112, a filter 1113, and a pressure gauge 1114. The safety valve 1112 ensures system and operating environment safety, the filter 1113 filters the input gas from the gas supply device 100, and the pressure gauge 1114 monitors the input gas pressure. Of course, additional components may be added or removed based on actual needs.

[0026] It should be noted that the controllable pressure reducer I121 cooperates with the pressure sensor I122 / the controllable pressure reducer II131 cooperates with the pressure sensor II132 to form a closed-loop control to output high-precision pressure.

[0027] Furthermore, the output end of the main gas circuit 110 is connected to a branch gas circuit III 140, which is serially connected to a pressure reducer 141. The branch gas circuit III 140 is mainly used to provide control gas with stable pressure to other components, which is specifically manifested in the following two aspects.

[0028] First aspect: In this embodiment, the controllable pressure reducer I121 and the controllable pressure reducer II131 are both set as gas-controlled pressure reducers 141, and the control interface of the controllable pressure reducer I121 and the control interface of the controllable pressure reducer II131 are both connected to the output end of the branch gas circuit III140, and the branch gas circuit III140 provides control gas for the controllable pressure reducer I121 and the controllable pressure reducer II131.

[0029] Specifically, branch gas line III 140 is serially connected along the airflow direction with a pressure reducer 141, a pressure gauge II 142, and an accumulator I 143. The pressure gauge II 142 is used to detect the pressure of the gas output from branch gas line III 140, while the accumulator I 143 is used to ensure the pressure stability of the gas output from branch gas line III 140. Of course, functional components can be added or removed based on actual needs.

[0030] Specifically, both controllable pressure reducers I121 and II131 include an ER5000 controller and a TESCOM pressure reducer 141. The ER5000 controller uses the output gas from branch line III140 as the control gas and works with a corresponding pressure sensor to precisely control the output pressure of TESCOM pressure reducer 141. The ER5000 controller is a microprocessor-based PID controller that achieves precise pressure control through the coordinated operation of components such as pressure sensors, PID controllers, and electric proportional valves.

[0031] Second aspect: In this embodiment, the gas circuit valve 111 and the control valve are designed as pneumatic ball valves, and both are connected to the output end of the branch gas circuit III 140 , and the branch gas circuit III 140 provides control gas for the pneumatic ball valve.

[0032] It should be noted that some of the valves mentioned later are also designed as pneumatic ball valves, which are explained in detail in the corresponding paragraphs.

[0033] The combination of the above two aspects not only allows the gas used by the system itself to be used as the control gas to reduce costs, but also enables remote control of the ER5000 controller and pneumatic ball valve, making control more flexible and convenient.

[0034] It is easy to understand that the gas supply device 100 should use high-pressure gas as input gas, including but not limited to nitrogen.

[0035] Specifically, the number of control branches is not limited. For example, in this embodiment, there are two control branches, namely control branch I150 and control branch II160. Control branch I150 is connected in series with control valve I151, and control branch II160 is connected in series with control valve II161. Control valve I151 and control valve II161 each control a storage tank.

[0036] More specifically, control branch I150 is connected in series with a control valve I151, a pressure gauge III152, and a safety valve II153 along the airflow direction. Control branch II160 is connected in series with a control valve II161, a pressure gauge IV162, and a safety valve III163 along the airflow direction. Of course, functional components may be added or removed based on actual needs.

[0037] It should be noted that the pressure relief branch I170 has two functions: first, when the working medium is filled into the storage tank, the pressure relief valve I171 and the corresponding control valve of the pressure relief branch I170 need to be opened to exhaust air so that the working medium can smoothly enter the storage tank; second, when the displacement pressure of the branch line I120 is large, the pressure relief can be adjusted through the pressure relief branch I170.

[0038] Furthermore, a pressure relief branch II180 is provided at the output end of the branch air path II130, and a pressure relief valve II181 is connected in series to the pressure relief branch II180. When the control pressure in the branch air path II130 is relatively high, the pressure relief can be adjusted through the pressure relief branch II180.

[0039] Specifically, the pressure relief valve I171 and the pressure relief valve II181 are both pneumatically controlled ball valves and are connected to the output end of the branch line III140. The branch line III140 provides control gas for the pneumatic ball valve, which can achieve remote control.

[0040] The medium storage device 200 includes a plurality of storage tanks arranged in series, and a shutoff valve 250 is connected in series between adjacent storage tanks. The plurality of storage tanks correspond one to one with and are adjacent to a plurality of control branches, and the input end of each storage tank is connected to the output end of the corresponding control branch.

[0041] It is easy to understand that when the gas is supplied by squeezing substitute, the storage tank is used to input the working medium to the test piece. The pressure of the working medium is determined by the pressure of the squeezing substitute gas, and the pressure of the squeezing substitute gas is guaranteed by the closed-loop control of the controllable pressure reducer I121 and the pressure sensor I122, thereby ensuring the input pressure of the test piece when the gas is supplied by squeezing substitute.

[0042] It is easy to understand that the purpose of having multiple storage tanks is to be able to adapt to occasions with different flow requirements. Single tank, double tank or multiple tanks can be selected according to actual needs.

[0043] Specifically, the number of storage tanks is not limited, but must be equal to the number of control branches. For example, in this embodiment, there are two storage tanks, namely storage tank I210 and storage tank II220. Storage tank I210 serves as the head tank and is connected to the output end of control branch I150, and storage tank II220 serves as the tail tank and is connected to the output end of control branch II160.

[0044] More specifically, storage tank I210 is provided with a liquid level gauge I230, and storage tank II220 is provided with a liquid level gauge II240, which is more conducive to obtaining the liquid level information of the storage tanks.

[0045] Specifically, the isolation valve 250 is a pneumatically controlled ball valve and is connected to the output end of the branch gas line III140. The branch gas line III140 provides control gas for the pneumatic ball valve, thereby enabling remote control.

[0046] Among them, the pump supply device 300 includes an air-extrusion supply branch 310, a pump supply branch 320, a supply trunk 330, a return path 340 and a flow path 350. The input end of the air-extrusion supply branch 310 is connected to the output end of the tail-end storage tank. The air-extrusion supply branch 310 is connected in series with a stop valve I311. The input end of the pump supply branch 320 is connected to the output end of the tail-end storage tank. The pump supply branch 320 is connected in series with a stop valve II321, a pump 323 and an air-controlled proportional regulating valve 325 in the fluid direction. The control interface of the air-controlled proportional regulating valve 325 is connected to the output end of the branch air path II130 and the return port is connected to the head-end storage tank. The input end of the tank, the output ends of the gas displacement supply branch 310 and the pump supply branch 320 are all connected to the input end of the supply main line 330. The supply main line 330 is connected in series with a test valve 332, a pressure sensor III334 and a flow meter 335 in the fluid direction. The output end of the supply main line 330 is used to connect to the medium inlet of the test piece. The input end of the reflux line 340 is used to connect to the medium outlet of the test piece and the output end is connected to the input end of the head end storage tank. The input end of the flow transmission line 350 is used to connect to the working medium source and the output end is connected between the stop valve II321 and the pump 323. The flow transmission line 350 is provided with a stop valve III351.

[0047] It is easy to understand that when the pump 323 is supplied, the air-controlled proportional regulating valve 325 is used to control the output pressure of the pump 323, and the control gas of the air-controlled proportional valve is provided by the branch line II130. The branch line II130 ensures the pressure accuracy of the control gas through the closed-loop control of the controllable pressure reducer II131 and the pressure sensor II132, thereby ensuring the input pressure of the test piece.

[0048] Specifically, pump supply branch 320 is serially connected along the fluid flow direction to a shutoff valve II 321, a filter II 322, a pump 323, a pressure gauge V 324, a pneumatic proportional control valve 325, and an accumulator II 326. Filter II 322 is used to filter the working medium output by pump 323, pressure gauge V 324 is used to detect the pressure of the working medium output by pump 323, and accumulator II 326 is used to ensure the pressure stability of the working medium output by pump 323. Of course, functional components may be added or removed based on actual needs.

[0049] Specifically, the pump 323 is a high-pressure plunger pump, and the reflux port of the high-pressure plunger pump is connected to the input end of the head-end storage tank.

[0050] More specifically, a safety valve IV327 is provided at the reflux port of the high-pressure plunger pump to ensure the safety of the system and the working environment.

[0051] In detail, the reflux port of the high-pressure plunger pump merges with the reflux port of the air-controlled proportional regulating valve 325 and is connected to the input end of the head end storage tank through a one-way valve I328. The reflux path 340 is connected to the input end of the head end storage tank through a one-way valve II342 to avoid backflow.

[0052] Specifically, supply trunk line 330 is serially connected along the fluid flow direction to a filter III 331, a test valve 332, a pressure sensor III 334, and a flow meter 335. Filter III 331 ensures the purity of the working medium entering the test piece, while flow meter 335 controls the flow rate of the working medium entering the test piece. Of course, additional functional components may be added or removed based on actual needs.

[0053] More specifically, the test valve 332 is a pneumatically controlled ball valve and is connected to the output end of the branch air line III 140 . The branch air line III 140 provides control gas for the pneumatic ball valve, enabling remote control.

[0054] Furthermore, both the supply main circuit 330 and the return circuit 340 are equipped with a radiator, which can cool the input working medium and the output working medium of the test piece to prevent the working medium from being overheated.

[0055] Specifically, a radiator I 333 is disposed in the supply trunk line 330 , and a radiator II 341 is disposed in the return line 340 .

[0056] A preferred air-controlled proportional control valve 325 is introduced below.

[0057] First, it should be noted that currently common pressure regulating valves include direct-acting and pilot-operated types. Both valves achieve pressure regulation by adjusting the balance between spring force and the hydraulic pressure at the valve inlet. However, due to the limited pressure regulation range of the spring, only a narrow pressure regulation range can be achieved when the spring remains unchanged, making it difficult to apply to hydraulic systems with a wider pressure regulation range. Therefore, this embodiment proposes a pneumatically controlled proportional regulating valve 325.

[0058] The aforementioned pneumatic proportional control valve comprises a valve housing 1 , a valve cover 2 and a valve core 3 .

[0059] The valve housing 1 is a cylindrical structure with an installation port 1.1 formed at one end and an overflow port 1.2 formed at the other end. Two coaxially arranged connecting ports 1.3 are opened on the side wall of the valve housing 1. The axes of the connecting ports 1.3 intersect and are perpendicular to the axis of the cylindrical structure.

[0060] Specifically, both connectors 1.3 are secured with connecting pipes 1.4, which are coaxially arranged with the connectors 1.3. The securing structure of the connecting pipes 1.4 and the connectors 1.3 is not limited, and may be welded or screwed. Regardless of the structure, the connection between the connecting pipes 1.4 and the connectors 1.3 must be sealed to prevent leakage. During use, one connecting pipe 1.4 serves as the inlet pipe, connected to the system piping, while the other serves as the outlet pipe.

[0061] More specifically, connecting pipe 1.4 is provided with a connecting flange 1.4.1 having a plurality of connecting holes 1.4.2 evenly distributed along its circumference. A first sealing ring 1.4.3 is also sleeved on connecting pipe 1.4, located on the side of connecting flange 1.4.1 away from connecting opening 1.3. Connecting pipe 1.4 is connected to the system pipeline via connecting flange 1.4.1, and a seal is achieved between connecting pipe 1.4 and the system pipeline via first sealing ring 1.4.3. Of course, the connection structure between connecting pipe 1.4 and the system pipeline is not limited to this. For example, the end of connecting pipe 1.4 may also be threaded to secure connecting pipe 1.4 to the system pipeline.

[0062] In detail, a positioning groove for clamping the first sealing ring 1.4.3 is provided on the connecting pipe 1.4 to prevent the first sealing ring 1.4.3 from axial displacement.

[0063] It should be noted that existing pressure regulating valves are generally installed in the bypass, which is not suitable for the needs of the main line. This embodiment, through the design of the connecting pipe 1.4, the connecting flange 1.4.1 and the first sealing ring 1.4.3, enables the regulating valve to be directly installed on the system main line.

[0064] Furthermore, a mounting seat 1.9 is provided on the side wall of the valve housing 1, and the mounting seat 1.9 is used to achieve the installation and fixation of the valve housing 1.

[0065] Specifically, four mounting seats 1.9 are provided, and the mounting seats 1.9 are designed as threaded seats. During use, the regulating valve of this embodiment can be fixed to an external structure using screws or other fasteners. Of course, the number and structure of the mounting seats 1.9 are not limited to this. For example, the mounting seats 1.9 can be provided in pairs, and the mounting seats 1.9 can be designed as snap-fit ​​structures, which can be snap-fitted to the external structure during use.

[0066] The valve cover 2 is sealed and fixed to the mounting opening 1.1 and is provided with a control air inlet 2.1 communicating with the inner cavity of the valve housing 1.

[0067] Specifically, the control air inlet 2.1 is an independent structure welded to the valve cover 2. A through hole is provided in the valve cover 2 to connect the control air inlet 2.1 with the inner cavity of the valve housing 1. During use, the control air inlet 2.1 is connected to the external air supply pipe. Of course, the form of the control air inlet 2.1 is not limited to this. For example, a hole can be directly opened in the valve cover 2 to serve as the control air inlet 2.1, and the external air supply pipe can be directly inserted into the hole during use.

[0068] Specifically, the valve cover 2 is sleeved with a second sealing ring 2.2, and when the valve cover 2 is fixed to the mounting port 1.1, the second sealing ring 2.2 abuts against the inner wall of the mounting port 1.1 to achieve sealing between the valve cover 2 and the mounting port 1.1.

[0069] More specifically, a positioning groove for clamping the second sealing ring 2.2 is provided on the valve cover 2 to prevent the second sealing ring 2.2 from axial displacement.

[0070] Specifically, the inner wall of the mounting port 1.1 is provided with an annular groove 1.5, the annular groove 1.5 is coaxial with the mounting port 1.1, and the annular groove 1.5 is evenly distributed along the circumference with a plurality of avoidance notches 1.5.1 extending to the end face of the mounting port 1.1, and a plurality of clamping blocks 2.3 are protruding on the side wall of the valve cover 2 corresponding to the avoidance notches 1.5.1, and when the valve cover 2 is fixed to the mounting port 1.1, the clamping blocks 2.3 are located on the side of the second sealing ring 2 close to the end face of the mounting port 1.1, and the valve housing 1 is provided with a pressing block 1.6 for pressing the valve cover 2, and the pressing block 1.6 has a working state for pressing the valve cover 2 and an avoidance state for detaching from the valve cover 2 to avoid disassembly of the valve cover 2. During installation, first place the clamping block 2.3 over the clearance notch 1.5.1. Then, push the valve cover 2 axially into the valve housing 1 until the clamping block 2.3 contacts the bottom of the annular groove 1.5. The valve cover 2 is then rotated circumferentially so that the clamping block 2.3 engages the area adjacent to the clearance notch 1.5.1. Finally, the valve cover 2 is tightened using the pressing block 1.6. This structure facilitates assembly and disassembly, and facilitates replacement of the valve cover 2 and valve core 3. Of course, the connection between the valve cover 2 and the mounting port 1.1 is not limited to this. For example, the valve cover 2 can also be threaded into the mounting port 1.1 and sealed with a second sealing ring 2.2.

[0071] More specifically, the pressing block 1.6 can be detachably fixed to the valve housing 1 by means of screws, buckles or magnets.

[0072] More specifically, in order to improve the positioning effect of the pressure block 1.6 on the valve cover 2, this embodiment provides a positioning groove 2.4 adapted to the pressure block 1.6 on the end surface of the valve cover 2. The pressure block 1.6 is placed in the positioning groove 2.4, which can not only axially press the valve cover 2, but also limit the circumferential rotation of the valve cover 2.

[0073] Among them, the valve core 3 is placed in the inner cavity of the valve housing 1. The valve core 3 is in the shape of a stepped shaft, and the large-diameter shaft section 3.1 is close to the valve cover 2, and the small-diameter shaft section 3.2 is away from the valve cover 2. The large-diameter shaft section 3.1 is slidably sealed on the inner wall of the valve housing 1 and forms a control air cavity 3.3 between it and the valve cover 2. The free end of the small-diameter shaft section 3.2 is set to be conical and used to insert into the overflow port 1.2. The stepped surface formed by the large-diameter shaft section 3.1 and the small-diameter shaft section 3.2 serves as a pressure surface and is located on the same side of the connecting port 1.3 as the valve cover 2.

[0074] Specifically, the large diameter shaft section 3.1 is sleeved with a third sealing ring 3.4, and the third sealing ring 3.4 abuts against the inner wall of the valve housing 1 to achieve sealing between the large diameter shaft section 3.1 and the valve housing 1.

[0075] More specifically, a positioning groove for clamping the third sealing ring 3.4 is provided on the large-diameter shaft section 3.1 to prevent the third sealing ring 3.4 from axial displacement.

[0076] Furthermore, the valve core 3 includes an extended shaft section 3.5, located on the side of the large-diameter shaft section 3.1 away from the small-diameter shaft section 3.2. The extended shaft section 3.5 has a larger diameter than the large-diameter shaft section 3.1. Since the area of ​​the valve cover 2 end surface corresponding to the control air cavity 3.3 directly determines the required control air pressure range, and the larger this area, the lower the required control air pressure, the valve core 3 of this embodiment is provided with the extended shaft section 3.5 to increase this area, thereby reducing the required control air pressure.

[0077] Specifically, the extended shaft section 3.5 is sleeved with a fourth sealing ring 3.6, which abuts the inner wall of the valve housing 1 to seal the extended shaft section 3.5 with the valve housing 1. A communication hole 1.7 is formed in the valve housing 1. One end of the communication hole 1.7 connects to the enclosed area formed by the valve core 3, the valve housing 1, the third sealing ring 3.4, and the fourth sealing ring 3.6, while the other end of the communication hole 1.7 is open to the outside world. The fourth sealing ring 3.6, in conjunction with the third sealing ring 3.4, achieves a double seal between the valve core 3 and the valve housing 1, enhancing the sealing effect. The fourth sealing ring 3.6 also prevents control air from entering the gap between the valve core 3 and the valve housing 1, ensuring valve control accuracy.

[0078] It should be noted that the connecting hole 1.4.2 is a process hole with two functions: first, it facilitates the installation of the fourth sealing ring 3.6; second, it can also prevent the gas pressure in the aforementioned closed area from being too high, which would affect the control accuracy of the valve.

[0079] More specifically, a positioning groove for clamping the fourth sealing ring 3.6 is provided on the extension shaft section 3.5 to prevent the fourth sealing ring 3.6 from axial displacement.

[0080] It's easy to understand that the area between the two connections 1.3 forms the control fluid chamber, where the fluid pressure equals the output working fluid pressure. When the valve core 3 is stable, the product of the control air pressure and the corresponding pressure surface of the valve core 3 equals the product of the output working fluid pressure and the corresponding pressure surface of the valve core 3.

[0081] Specifically, a pipe joint 1.8 is further provided on the side wall of the valve housing 1, and the pipe joint 1.8 is in communication with the area between the two connection ports 1.3. A pressure sensor or a pressure gauge can be connected to the pipe joint 1.8 to measure the fluid pressure.

[0082] The working principle of the air-controlled proportional control valve in this embodiment is as follows: During installation, connect the two connecting pipes 1.4 to the system pipelines and connect the control air inlet 2.1 to the control air source; When the regulating valve needs to be closed: When the control gas pressure is increased so that the product of the control gas pressure and the corresponding pressure surface of the valve core 3 is greater than the product of the working fluid pressure and the corresponding pressure surface of the valve core 3, the valve core 3 is inserted into the overflow port 1.2. At this time, the regulating valve is in the closed state, and the pressure of the output working fluid is equal to the pressure of the input working fluid. When the regulating valve needs to be opened: The control gas pressure is reduced so that the product of the control gas pressure and the corresponding pressure surface of the valve core 3 is less than the product of the working fluid pressure and the corresponding pressure surface of the valve core 3. The valve core 3 moves away from the overflow port 1.2, thereby gradually increasing the gap between the valve core 3 and the overflow port 1.2, and then gradually reducing the pressure of the output working fluid until the valve core 3 is balanced again. In this way, the output working fluid pressure is regulated, that is, the output pressure is regulated; The required pressure of the control gas is determined according to the area ratio of the two pressure-bearing surfaces of the valve core 3 in combination with the required output pressure, thereby achieving precise control of the actual output pressure through the control gas.

[0083] It should be noted that the area ratio of the two pressure-bearing surfaces of the valve core 3 is divided into 1:1, 1.2:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1 and the like. Regulating valves with different area ratios can be selected according to the actual control gas pressure and fluid pressure range required by the system.

[0084] It should be noted that the systems mentioned above include but are not limited to hydraulic systems.

[0085] In the pneumatic proportional control valve provided in this embodiment, the control gas and the working fluid act on both sides of the valve core respectively. When the product of the control gas pressure and the corresponding pressure surface of the valve core is greater than the product of the output working fluid pressure and the corresponding pressure surface of the valve core, the valve core is inserted into the overflow port. At this time, the control valve is in a closed state, and the pressure of the output working fluid is equal to the pressure of the input working fluid. Since the areas of the two pressure surfaces of the valve core are also fixed values ​​after the structure is determined, the valve core can be moved away from the overflow port by reducing the pressure of the control gas, thereby gradually increasing the gap between the valve core and the overflow port, and then gradually reducing the pressure of the output working fluid until the valve core is balanced again, thereby achieving the regulation of the output working fluid pressure, that is, the output pressure regulation. This control valve uses control gas instead of the existing spring. The output pressure of the working fluid can be regulated by regulating the pressure of the control gas. The regulation range is larger, the regulation is more stable, and the control accuracy is higher. It is particularly suitable for hydraulic systems with a large pressure regulation range and high precision requirements.

[0086] The working principle of the multifunctional medium supply system of this embodiment is as follows: When gas squeeze is supplied as a single can: The working medium source passes through the stop valve III351, filter II322, pump 323, pressure gauge V324, air-controlled proportional control valve 325, accumulator II326, stop valve I311 and enters the storage tank II220. At the same time, the control valve II161 and the pressure relief valve I171 are opened to exhaust until the storage tank II is filled with the working medium. High-pressure nitrogen is input into the main gas line 110, passes through the gas line valve 111, the safety valve I112, the filter I113 and the pressure gauge I114 in sequence, and then is divided into three paths and enters the branch gas line I120, the branch gas line II130 and the branch gas line III140 respectively; The nitrogen in the branch line III140 passes through the pressure reducer 141, the pressure gauge II142, and the accumulator I143 in sequence and is then delivered to the branch line I120, the branch line II130, and the air-controlled ball valves (including the air line valve 111, the control valve I151, the control valve II161, the pressure relief valve I171, the pressure relief valve II181, the isolation valve 250, and the test valve 332). The nitrogen in the branch gas line I120 passes through the controllable pressure reducer I121 and the pressure sensor I122 in sequence before entering the control branch line II160. It then passes through the control valve II161, the pressure gauge IV162, and the safety valve III163 in sequence before entering the storage tank II220. Under the action of the nitrogen pressure, the working medium in the storage tank II220 is squeezed out from the lower output end and enters the gas extrusion supply branch line 310. It then passes through the stop valve I311 and enters the supply main line 330. Within the supply main line 330, the working medium passes through the filter III331, the test valve 332, the radiator I333, the pressure sensor III334, and the flowmeter 335 in sequence before entering the test piece for testing. After being discharged from the test piece, the working medium enters the return line 340 and flows back to the storage tank I210 through the radiator II341 and the one-way valve II342 in sequence. The nitrogen in the branch gas line II130 passes through the controllable pressure reducer II131 and the pressure sensor II132 in sequence and then enters the gas-controlled proportional control valve 325, closing the gas-controlled proportional control valve 325 and closing all other unrelated pipelines. When the displacement pressure of the branch line I120 is too high, the pressure relief valve I171 can be opened to reduce the pressure; when the control pressure of the branch line II130 is too high, the pressure relief valve II181 can be opened to reduce the pressure.

[0087] When gas extrusion is used to supply two tanks, the difference from gas extrusion to supply a single tank is the following two points: First, when the working medium source enters the storage tank II 220, the control valve I 151, the pressure relief valve I 171, and the isolation valve 250 are opened to exhaust until both the storage tanks I and II are filled with the working medium; Second, the nitrogen in the branch line I120 passes through the controllable pressure reducer I121 and the pressure sensor I122 in turn and enters the control branch line I150, and passes through the control valve I151, the pressure gauge III152 and the safety valve II153 in turn to enter the storage tank I210. Under the action of the nitrogen pressure, the working medium in the storage tank I210 is squeezed out from the lower output end and passes through the isolation valve 250 to enter the storage tank II220. Then the working medium in the storage tank II220 is squeezed out from the lower output end and enters the gas extrusion supply branch line 310.

[0088] Pump 323 supplied: The working medium is output from the storage tank II220 and enters the supply branch 320, and then passes through the stop valve II321, filter II322, pump 323 and pressure gauge V324 before reaching the air-controlled proportional control valve 325; The nitrogen in the branch gas line II130 passes through the controllable pressure reducer II131 and the pressure sensor II132 in sequence and then enters the gas-controlled proportional control valve 325 to control the output pressure of the gas-controlled proportional control valve 325; After the working medium is output from the air-controlled proportional regulating valve 325, it passes through the accumulator II 326 and enters the supply trunk line 330. The process of the supply trunk line 330 and the return line 340 is the same as that of the gas squeeze replacement single tank supply; The return medium of the pneumatic proportional control valve 325 flows back into the storage tank 1210 after passing through the one-way valve 1328; The return medium of pump 323 flows back into storage tank I210 after passing through safety valve IV327 and one-way valve I328 in sequence.

[0089] It should be noted that when a pump supply method is used, the working medium is output from the storage tank and then enters pump 323. The main purpose is to use the pressure of the storage tank to meet the inlet pressure requirement of pump 323. When the working medium source's own pressure can meet the inlet pressure requirement of pump 323, the shut-off valve II321 can be closed, and the working medium can be directly supplied to pump 323 from the working shut-off source. Similarly, when pumping the working medium into the storage tank, if the working medium source's own pressure can meet the pumping requirement, the working medium can also pass through shut-off valve III351 and shut-off valve II321 directly into storage tank II220.

[0090] The above is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be covered by the scope of protection of the claims.

Claims

1. A multifunctional medium supply system, characterized in that: include: A gas supply device (100) includes a main gas circuit (110), an input end of the main gas circuit (110) for connecting to a gas source, a gas circuit valve (111) connected in series to the main gas circuit (110), an output end of the main gas circuit (110) connected to a branch gas circuit I (120) and a branch gas circuit II (130), the branch gas circuit I (120) being connected in series with a controllable pressure reducer I (121) and a pressure sensor I (122) along an airflow direction, the output end of the branch gas circuit I (120) being connected to a plurality of control branches, each of which being connected in series with a control valve, the output end of the branch gas circuit I (120) being further provided with a pressure relief branch I (170), the pressure relief branch I (170) being connected in series with a pressure relief valve I (171), and the branch gas circuit II (130) being connected in series with a controllable pressure reducer II (131) and a pressure sensor II (132) along an airflow direction; A medium storage device (200) includes a plurality of storage tanks arranged in series, with isolation valves (250) connected in series between adjacent storage tanks, the plurality of storage tanks corresponding one-to-one to and adjacent to the plurality of control branches, and the input end of each storage tank connected to the output end of the corresponding control branch; A pump supply device (300) comprises an air-extrusion supply branch (310), a pump supply branch (320), a supply trunk (330), a return path (340) and a flow path (350), wherein the input end of the air-extrusion supply branch (310) is connected to the output end of the tail-end storage tank, the air-extrusion supply branch (310) is connected in series with a stop valve I (311), the input end of the pump supply branch (320) is connected to the output end of the tail-end storage tank, the pump supply branch (320) is connected in series with a stop valve II (321), a pump (323) and an air-controlled proportional regulating valve (325) in the fluid direction, the control interface of the air-controlled proportional regulating valve (325) is connected to the output end of the branch air path II (130) and the return port is connected to the head-end storage tank. The input end of the tank, the output ends of the gas displacement supply branch (310) and the pump supply branch (320) are all connected to the input end of the supply trunk (330), and the supply trunk (330) is sequentially connected in series with a test valve (332), a pressure sensor III (334) and a flow meter (335) along the fluid direction. The output end of the supply trunk (330) is used to connect to the medium inlet of the test piece, the input end of the return path (340) is used to connect to the medium outlet of the test piece, and the output end is connected to the input end of the head end storage tank, the input end of the flow transmission path (350) is used to connect to the working medium source, and the output end is connected between the stop valve II (321) and the pump (323), and the flow transmission path (350) is provided with a stop valve III (351).

2. The multifunctional medium supply system according to claim 1, characterized in that: The output end of the main gas circuit (110) is further connected to a branch gas circuit III (140), and the branch gas circuit III (140) is connected in series with a pressure reducer (141). Both the controllable pressure reducer I (121) and the controllable pressure reducer II (131) are gas-controlled pressure reducers (141). The output end of the branch gas circuit III (140) is connected to the control interface of the controllable pressure reducer I (121) and the control interface of the controllable pressure reducer II (131).

3. The multifunctional medium supply system according to claim 2, characterized in that: The output end of the branch gas path II (130) is provided with a pressure relief branch path II (180), and the pressure relief branch path II (180) is connected in series with a pressure relief valve II (181).

4. The multifunctional medium supply system according to claim 3, characterized in that: The air circuit valve (111), the control valve, the isolation valve (250), the test valve (332) and the pressure relief valve are all air-controlled ball valves and are all connected to the output end of the branch air circuit III (140).

5. The multifunctional medium supply system according to any one of claims 2 to 4, characterized in that: The output end of the pressure reducer (141) and the output end of the air-controlled proportional regulating valve (325) are both connected in series with an accumulator.

6. The multifunctional medium supply system according to claim 1, characterized in that: The pump (323) is a high-pressure plunger pump, and the reflux port of the high-pressure plunger pump is connected to the input end of the head-end storage tank.

7. The multifunctional medium supply system according to claim 6, characterized in that: The main gas circuit (110), the control branch circuit, and the reflux port of the high-pressure plunger pump are all provided with safety valves.

8. The multifunctional medium supply system according to claim 1, wherein: The output end of the gas circuit valve (111), the input end of the pump (323) and the input end of the test valve (332) are all connected in series with filters.

9. The multifunctional medium supply system according to claim 1, wherein: The supply trunk line (330) and the return line (340) are both equipped with radiators.

10. The multifunctional medium supply system according to claim 1, wherein: The air-controlled proportional regulating valve (325) comprises: A valve housing (1) having a cylindrical structure and forming a mounting port (1.1) at one end and an overflow port (1.2) at the other end; two coaxially arranged connecting ports (1.3) are provided on a side wall of the valve housing (1); the axes of the connecting ports (1.3) intersect and are perpendicular to the axis of the cylindrical structure; A valve cover (2) is sealed and fixed to the mounting opening (1.1) and is provided with a control air inlet (2.1) communicating with the inner cavity of the valve housing (1); A valve core (3) is placed in the inner cavity of the valve housing (1), the valve core (3) is in the shape of a stepped shaft, and the large-diameter shaft section (3.1) is close to the valve cover (2), and the small-diameter shaft section (3.2) is away from the valve cover (2), the large-diameter shaft section (3.1) is slidingly sealed on the inner wall of the valve housing (1) and forms a control air cavity (3.3) between the large-diameter shaft section (3.1) and the valve cover (2), the free end of the small-diameter shaft section (3.2) is set to be conical and is used to insert into the overflow port (1.2), the stepped surface formed by the large-diameter shaft section (3.1) and the small-diameter shaft section (3.2) serves as a pressure surface and is located on the same side of the connecting port (1.3) as the valve cover (2).

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