A methanol high-pressure and high-flow pressure regulating valve

Abstract

The present invention relates to the technical field of high-pressure, large-flow methanol test benches, and specifically to a methanol high-pressure, large-flow pressure regulating valve, comprising a valve cover, a valve body, a valve core, a valve seat, a high-pressure joint, an oil outlet joint, an oil outlet valve assembly, a pressure-regulating spring, a spring seat, an adjusting screw, a mechanical manually adjustable proportional valve and a connecting pipeline. The valve cover and the valve body are connected to form a methanol purge chamber and a purge passage, the valve body and the high-pressure joint are connected to form a methanol purge passage, the valve cover, the valve body, the valve core and the spring seat form a leakage purge chamber, the valve body, the valve seat and the oil outlet valve assembly form a pressure chamber, the valve cover and the adjusting screw form a flow-controllable gas passage, the valve cover, the adjusting screw, the valve body and the oil outlet joint form a methanol purge passage, the mechanical manually adjustable proportional valve is connected to the valve cover with a pipeline to provide stable, flow-variable air or nitrogen, the spring seat, the pressure-regulating spring, the valve core, the valve body and the valve seat are combined to form an intake regulating pressure valve.

Description

Technical Field

[0001] The invention relates to the technical field of a large-flow test bench for a methanol fuel injection system, in particular to a methanol high-pressure and large-flow pressure regulating valve. Background Art

[0002] With the increasing adoption of low-carbon fuels, the requirements for the pressure regulating valves in low-carbon fuel test benches are becoming increasingly stringent. On one hand, the reliability requirements for pressure regulating valves are increasing, and because low-carbon fuels require a higher flow rate for the same power requirement, the specifications of the pressure regulating valves must meet this high flow rate requirement. On the other hand, the toxic, flammable, explosive, and volatile nature of low-carbon fuels place even higher demands on the leakage control of pressure regulating valves, such as achieving zero gap leakage, ensuring purge cleaning, and remote control capabilities.

[0003] Traditional pressure regulating valves are generally electromagnetically controlled, and the needle valve pair of the flow and pressure injection system needs to take into account the above requirements at the same time, so it is impossible to achieve the best in all aspects, which also limits the reliability of the product. Summary of the Invention

[0004] The present invention aims to provide a remotely controllable methanol high-pressure and high-flow pressure regulating valve to provide a safe, reliable, remotely controllable, high-pressure and high-flow pressure regulating valve for a methanol test bench.

[0005] In order to achieve the above object, the basic scheme of the present invention is as follows:

[0006] A controllable methanol high-pressure and high-flow pressure regulating valve, comprising: a valve cover, a valve body, a valve core, a valve seat, a high-pressure connector, an oil outlet connector, an oil outlet valve assembly, a pressure regulating spring, a spring seat, a mechanical manually adjustable proportional valve, and connecting pipes;

[0007] The mechanical manually adjustable proportional valve is connected to the air inlet passage of the valve cover through the connecting pipeline;

[0008] The valve body is provided with a valve cover mounting hole and a high-pressure connector mounting hole, a portion of the valve cover is inserted into the valve cover mounting hole, and a portion of the high-pressure connector is assembled in the high-pressure connector mounting hole;

[0009] The spring seat is mounted on the valve cover; the valve core is slidably inserted into the valve body; the pressure-regulating spring is arranged between the valve core and the spring seat; the valve seat is mounted between the valve core and the high-pressure connector; the oil outlet connector is mounted on the valve body; the oil outlet valve assembly is slidably mounted between the valve body and the oil outlet connector;

[0010] A purge chamber is formed between the valve body, the high-pressure connector, and the valve seat. A first purge channel connected to the purge chamber is provided between the valve cover and the valve body. A second purge channel connected to the purge chamber is provided on the high-pressure connector. The first purge channel is connected to the air inlet duct.

[0011] A leakage purge chamber is formed between the valve body, the valve cover, the spring seat and the valve core, the leakage purge chamber is connected to the purge chamber through the return air hole provided on the valve body, and the valve body is provided with a leakage outlet hole connected to the leakage purge chamber;

[0012] A pressure chamber is formed between the oil outlet valve assembly, the valve body and the valve seat; a connected air cavity and a methanol inlet hole are provided on the oil outlet valve assembly; and a methanol inlet passage connected to the pressure chamber is provided on the valve seat and the high-pressure connector;

[0013] The oil outlet joint is provided with a methanol exhaust passage communicating with the air cavity;

[0014] When the oil outlet valve assembly is in operation, the methanol inlet hole is in communication with the pressure chamber;

[0015] When the oil outlet valve assembly is not working, the methanol air inlet hole is not connected to the pressure chamber.

[0016] Preferably, a third purge channel communicating with the air inlet duct is provided on the valve body and the valve cover;

[0017] When the oil outlet valve assembly is in operation, the oil outlet valve assembly closes the third purge channel;

[0018] When the oil outlet valve assembly is not in operation, a channel is formed between the oil outlet valve assembly and the oil outlet joint for the gas in the third purge channel to enter the air cavity and the methanol exhaust channel.

[0019] Preferably, the oil outlet valve assembly comprises: an oil outlet valve and an oil outlet valve spring;

[0020] The oil outlet valve is slidably mounted in the oil outlet valve mounting cavity of the valve body; the oil outlet valve is provided with the methanol air inlet hole and the air cavity;

[0021] The oil outlet valve spring is installed in the air cavity of the oil outlet valve and is connected to the oil outlet joint.

[0022] Preferably, an adjusting screw is installed on the valve cover, and the adjusting screw extends into or does not extend into the third purge channel.

[0023] Preferably, when methanol is not introduced into the high-pressure connector, the valve core and the valve seat form a conical seal.

[0024] Preferably, the ratio of the aperture of the air inlet of the valve cover to the aperture of the leakage air outlet of the valve body is 1:2.

[0025] Preferably, the gas introduced into the mechanical manually adjustable proportional valve is air or helium.

[0026] Beneficial effects of this program:

[0027] (1) In this scheme, the mechanical manually adjustable proportional valve is connected to the pressure regulating valve by a connecting pipe, which can be adjusted away from the high-pressure area of ​​the methanol test. The pressure regulating valve is controlled by mechanical and gas control as a whole, and no electric sparks will be generated, further eliminating the possibility of methanol being flammable and explosive.

[0028] (2) Due to the characteristics of methanol such as high volatility, low boiling point and toxicity, the first purge channel and the third purge channel distributed on the valve cover and valve body can not only dilute and purge the leaked methanol, but also have cooling capabilities to ensure that methanol will not leak to the outside and reduce the possibility of methanol volatilization and gasification.

[0029] (3) Add an oil outlet valve at the outlet of the pressure chamber, which serves as the pressure relief outlet, to keep the pressure in the pressure chamber within the required range at all times and prevent methanol from vaporizing due to the temperature rise caused by pressure relief. Since methanol boils at 64.5°C at atmospheric pressure and 138°C at 1MPa, heat is generated when methanol is released at high pressure, and the temperature is expected to reach 80-100°C. Adding the pressure chamber in this application can prevent methanol vaporization.

[0030] (4) Through the arrangement of the third purge channel, the residual methanol at the rear end of the oil outlet joint can be purged, preventing excessive methanol from remaining on the test bench.

[0031] (5) The pressure regulating screw adjusts the flow rate of the purge gas entering the third air hole, so that the pressure regulating valve can adapt to test equipment with a wider range of air intake volumes.

[0032] (6) The components of the pressure regulating valve have a higher structural strength. After assembly, it can be used to regulate the pressure of high-pressure and large-flow methanol with a flow rate of 0.2-60L / min and a pressure of 0-200MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0034] Figure 2 It is a left side view of an embodiment of the present invention;

[0035] Figure 3 This is an enlarged schematic diagram of the assembly of the oil delivery valve assembly in the valve body according to an embodiment of the present invention;

[0036] Description of reference numerals:

[0037] 1-valve cover; 2-valve body; 3-valve core; 4-valve seat; 5-high-pressure connector; 6-oil outlet connector; 7-oil outlet valve assembly; 8-pressure regulating spring; 9-spring seat; 10-adjusting screw; 11-mechanical manual proportional valve; 12-connecting pipe;

[0038] 111; air inlet; 112- air outlet; 113- screw;

[0039] 101-first air hole; 102-third air hole; 103-air inlet;

[0040] 201 - first air hole; 202 - fourth air hole; 203 - purge chamber; 204 - pressure chamber; 206 - leakage purge chamber; 205 - return air hole; 207 - leakage outlet hole;

[0041] 401- second methanol flow channel;

[0042] 501-second purge channel; 502-first methanol flow channel;

[0043] 601-methanol exhaust duct;

[0044] 71-oil outlet valve; 72-oil outlet valve spring; 711-methanol inlet hole; 712-channel. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] like Figure 1 、 Figure 2 As shown: An embodiment of the present application provides a remotely controllable methanol high-pressure and large-flow pressure regulating valve, including a valve cover 1, a valve body 2, a valve core 3, a valve seat 4, a high-pressure connector 5, an oil outlet connector 6, an oil outlet valve assembly 7, a pressure regulating spring 8, a spring seat 9, an adjusting screw 10, a mechanical manually adjustable proportional valve 11 and a connecting pipe 12.

[0047] The mechanical manually adjustable proportional valve 11 is connected to the air inlet 103 of the valve cover 1 through the connecting pipe 12 .

[0048] A valve cover mounting hole and a high-pressure connector mounting hole are provided on the valve body 2 . A portion of the valve cover 1 is inserted into the valve cover mounting hole, and a portion of the high-pressure connector 5 is assembled in the high-pressure connector mounting hole.

[0049] The spring seat 9 is assembled on the valve cover 1 .

[0050] The valve core 3 is slidably inserted into the valve body 2 .

[0051] The pressure regulating spring 8 is arranged between the valve core 3 and the spring seat 9 .

[0052] The valve seat 4 is assembled between the valve core 3 and the high-pressure connector 5. When no methanol is introduced into the high-pressure connector 5, the valve core 3 and the valve seat 4 form a conical seal.

[0053] The oil outlet joint 6 is installed on the valve body 2.

[0054] The oil outlet valve assembly 7 is slidably installed between the valve body 2 and the oil outlet joint 6 .

[0055] Among them, the first air hole 101 of the valve cover 1 and the second air hole 201 of the valve body 2 constitute a first purge channel, and the first air hole 101 is connected to the air inlet 103 of the valve cover 1; a purge chamber 203 is formed between the valve body 2, the high-pressure connector 5 and the valve seat 4, and the second air hole 201 is connected to the purge chamber 203; a second purge channel 501 connected to the purge chamber 203 is provided on the high-pressure connector 5.

[0056] A leakage purge chamber 206 is formed between the valve body 2, the valve cover 1, the spring seat 9 and the valve core 3; the leakage purge chamber 206 is connected to the purge chamber 203 through the return air hole 205 provided on the valve body, and a leakage outlet hole 207 connected to the leakage purge chamber 206 is provided on the valve body 2.

[0057] The purge gas enters the purge chamber 203 through the mechanical manual proportional valve 11, the connecting pipe 12, the air inlet 103 and the first purge channel. Part of it is purged out through the second purge channel 501, and the other part enters the leakage purge chamber 206 through the return air hole 205 of the valve body 2, and the methanol leakage gas is discharged through the leakage outlet 207.

[0058] A pressure chamber 204 is formed between the valve body 2, valve seat 4, and oil outlet valve assembly 7. The oil outlet valve assembly 7 is provided with a connected air chamber and a methanol inlet hole 711. A methanol inlet passage connecting to the pressure chamber 204 is provided on the valve seat 4 and the high-pressure connector 5. The oil outlet connector 6 is provided with a methanol exhaust passage 601 communicating with the air chamber. When the oil outlet valve assembly 7 is operating, the methanol inlet hole 711 communicates with the pressure chamber 204. When the oil outlet valve assembly 7 is not operating, the methanol inlet passage and the pressure chamber 204 are disconnected. The second methanol flow passage 401 on the valve seat 4 and the first methanol flow passage 502 on the high-pressure connector 5 constitute the aforementioned methanol inlet passage. When the oil outlet valve assembly 7 is operating, methanol enters the pressure chamber 204 through the methanol inlet passage, then enters the air chamber through the methanol inlet hole 711 of the oil outlet valve assembly 7, and is then discharged through the methanol exhaust passage 601 of the oil outlet connector 6.

[0059] In the embodiment of the present application, a third purge channel connected to the air inlet 103 is provided on the valve body 2 and the valve cover 1. The third purge channel is formed by connecting the third air hole 102 on the valve cover 1 and the fourth air hole 202 on the valve body 2.

[0060] Reference Figure 3 The oil outlet valve assembly 7 in the embodiment of the present application specifically comprises an oil outlet valve 71 and an oil outlet valve spring 72 . The oil outlet valve 71 is slidably mounted within the oil outlet valve mounting cavity of the valve body 2 . The oil outlet valve 71 is provided with the methanol inlet hole 711 and an air cavity. The oil outlet valve spring 72 is mounted within the air cavity of the oil outlet valve 711 and is connected to the oil outlet connector 6 . There are four methanol inlet holes 711, which provide a two-stage pressure reduction for the methanol entering the pressure chamber 204 .

[0061] The valve cover 1 and adjustment screw 10 cooperate to control the gas flow in the third air hole 102. Depending on the intake flow rate before the mechanical, manually adjustable proportional valve 11, the adjustment screw 10 in this embodiment can accommodate purge gas flows of 0.6-3 m³ / h. The adjustment screw 10 is rotated to different positions within the third air hole 102. When the adjustment screw 10 is not inserted into, or partially inserted into, the third air hole 102, partially allows gas in the intake passage 103 to pass through the third purge passage and into the passage 712 formed between the oil outlet valve 71 and the oil outlet connector 6. The gas then enters the methanol exhaust passage 601, purging the subsequent pipelines.

[0062] Mechanical, manually adjustable proportional valve 11 is connected to the air inlet of valve cover 1 via connecting pipe 12. Adjusting screw 113 provides a stable, variable flow of air or nitrogen to valve cover 1. The principle of mechanical, manually adjustable proportional valve 11 is as follows: Gas at a fixed flow rate and pressure is introduced through its air inlet 111. The opening size is adjusted by rotating screw 113 to control the gas flow entering connecting pipe 12. Excess gas is discharged through air outlet 112.

[0063] The ratio of the diameter of the air inlet hole of the valve cover 1 to the diameter of the leakage outlet hole 207 of the valve body 2 is 1:2, ensuring that the inside of the leakage purge chamber 206 is close to the atmosphere.

[0064] The specific implementation process of the above-mentioned controllable methanol high-pressure and large-flow pressure regulating valve is as follows: during operation, according to the air intake capacity, the adjusting screw 10 is adjusted to the appropriate position, and the intake air is passed into the air inlet 111 of the mechanical manually adjustable proportional valve 11. By adjusting the screw 113, the air intake amount of the connecting pipe 12 entering the valve cover 1 is controlled. The gas entering the valve cover 1 is divided into two parts. One part is connected with the second air hole 201 of the valve body 2 through the first air hole 101 of the valve cover 1, enters the purge chamber 203, and then enters the leakage purge chamber 206 through the return air hole 205 of the valve body 2, and flows out through the leakage outlet 207, forming a methanol leakage purge circuit, and at the same time has the function of cooling the valve seat 4 (here is the temperature rise of the valve seat 4 caused by the pressure loss of high-pressure methanol); the other part of the gas generates downward pressure on the spring seat 9, and transmits pressure to the valve core 3 through the pressure regulating spring 8 to control the opening pressure at the valve seat 4. When the gas flows out, if the oil outlet valve assembly 7 is not lifted, part of the gas will enter the methanol exhaust passage 601 of the oil outlet connector 6 through the third air hole 102 of the valve cover 1 and the fourth air hole 202 of the valve body 2, and purge the subsequent pipeline.

[0065] Before and after the test bench works, the oil outlet valve 71 is not lifted, and the methanol behind the oil outlet connector 6 can be purged by introducing purge gas. During the working process, the oil outlet valve 71 is lifted and the passage is closed, then only methanol flows.

[0066] If a sudden pressure rise occurs in the air cavity formed by the oil outlet valve 71 and the oil outlet connector 6 due to the sudden gasification of methanol, the oil outlet valve 7 will be seated. The methanol gas can be reversed from the third purge channel to the valve cover 1 and discharged from behind the adjusting screw 10, thereby alleviating the problem of sudden pressure rise.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0068] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A methanol high-pressure and high-flow pressure regulating valve, characterized in that: include: Valve cover (1), valve body (2), valve core (3), valve seat (4), high-pressure connector (5), oil outlet connector (6), oil outlet valve assembly (7), pressure regulating spring (8), spring seat (9), mechanical manually adjustable proportional valve (11) and connecting pipe (12); The mechanical manually adjustable proportional valve (11) is connected to the air inlet (103) of the valve cover (1) via the connecting pipe (12); The valve body (2) is provided with a valve cover mounting hole and a high-pressure connector mounting hole, a portion of the valve cover (1) is inserted into the valve cover mounting hole, and a portion of the high-pressure connector (5) is assembled in the high-pressure connector mounting hole; The spring seat (9) is mounted on the valve cover (1); the valve core (3) is slidably inserted into the valve body (2); the pressure regulating spring (8) is arranged between the valve core (3) and the spring seat (9); the valve seat (4) is mounted between the valve core (3) and the high-pressure connector (5); the oil outlet connector (6) is mounted on the valve body (2); the oil outlet valve assembly (7) is slidably mounted between the valve body (2) and the oil outlet connector (6); A purge chamber (203) is formed between the valve body (2), the high-pressure connector (5), and the valve seat (4); a first purge channel connected to the purge chamber (203) is provided between the valve cover (1) and the valve body (2); a second purge channel (501) connected to the purge chamber (203) is provided on the high-pressure connector (5); the first purge channel is connected to the air inlet (103); A leakage purge chamber (206) is formed between the valve body (2), the valve cover (1), the spring seat (9) and the valve core (3); the leakage purge chamber (206) is connected to the purge chamber (203) via an air return hole (205) provided on the valve body (2); and a leakage outlet hole (207) is provided on the valve body (2) and is connected to the leakage purge chamber (206); A pressure chamber (204) is formed between the oil outlet valve assembly (7), the valve body (2) and the valve seat (4); a communicating air chamber and a methanol inlet hole (711) are provided on the oil outlet valve assembly (7); and a methanol inlet passage communicating with the pressure chamber (204) is provided on the valve seat (4) and the high-pressure connector (5); The oil outlet joint (6) is provided with a methanol exhaust passage (601) communicating with the air cavity; When the oil outlet valve assembly (7) is in operation, the methanol inlet hole (711) is in communication with the pressure chamber (204); When the oil outlet valve assembly (7) is not in operation, the methanol air inlet hole (711) is not in communication with the pressure chamber (204).

2. The methanol high-pressure and high-flow pressure regulating valve according to claim 1, characterized in that: The valve body (2) and the valve cover (1) are provided with a third purge channel connected to the air inlet channel; When the oil outlet valve assembly (7) is in operation, the oil outlet valve assembly (7) closes the third purge channel; When the oil outlet valve assembly (7) is not in operation, a channel (712) is formed between the oil outlet valve assembly (7) and the oil outlet connector (6) for the gas in the third purge channel to enter the gas cavity and the methanol exhaust channel (601).

3. The methanol high-pressure and high-flow pressure regulating valve according to claim 2, characterized in that: The oil outlet valve assembly (7) comprises: an oil outlet valve (71) and an oil outlet valve spring (72); The oil outlet valve (71) is slidably mounted in the oil outlet valve mounting cavity of the valve body (2); the oil outlet valve (71) is provided with the methanol air inlet hole (711) and the air cavity; The oil outlet valve spring (72) is installed in the air cavity of the oil outlet valve (71) and is connected to the oil outlet joint (6).

4. The methanol high-pressure and high-flow pressure regulating valve according to claim 2, characterized in that: An adjusting screw (10) is mounted on the valve cover (1), and the adjusting screw (10) extends into or does not extend into the third purge channel.

5. The methanol high-pressure and high-flow pressure regulating valve according to claim 1, characterized in that: When methanol is not introduced into the high-pressure connector (5), the valve core (3) and the valve seat (4) form a conical surface seal.

6. The methanol high-pressure and high-flow pressure regulating valve according to claim 1, characterized in that: The ratio of the aperture of the air inlet hole of the valve cover (1) to the aperture of the leakage air outlet hole (207) of the valve body (2) is 1:

2.

7. The methanol high-pressure and high-flow pressure regulating valve according to claim 1, characterized in that: The gas introduced into the mechanical manually adjustable proportional valve (11) is air or helium.

8. The methanol high-pressure and high-flow pressure regulating valve according to claim 1, characterized in that: The methanol high-pressure and high-flow pressure regulating valve is used for regulating the pressure of high-pressure and high-flow methanol with a flow rate of 0.2-60 L / min and a pressure of 0-200 MPa.

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