Composite air inlet valve group

Abstract

A composite air inlet valve bank is used for conveying compressed air from a gas storage to an expansion machine, the composite air inlet valve bank comprises a main valve, an adjusting valve and at least one pressure reducing valve which are located in an integrated valve shell, the main valve is communicated with the gas storage, the adjusting valve and the pressure reducing valve are communicated with the expansion machine, and when the main valve is opened, the pressure reducing valve is opened. And valve cavities of the regulating valve and the pressure reducing valve are communicated with a valve cavity of the main valve. The combined type gas inlet valve set is compact in structure, convenient to arrange and powerful in function, the main valve, the adjusting valve and the pressure reducing valve are integrated in the integrated valve shell, and gas flow provided by an upstream gas storage enters the combined type gas inlet valve set through the main valve; the compressed air energy storage unit can be divided into a plurality of air flows with different pressures and flows by the adjusting valve and the pressure reducing valve according to requirements, and the air flows enter the downstream expansion acting unit, so that the functions of high-pressure starting, sliding parameter operation, wide adjusting range, large pressure reducing amplitude and the like of the compressed air energy storage unit can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressed air energy storage power generation field especially relates to a composite air inlet valve group for compressed air energy storage turbine generator set. BACKGROUND

[0002] The compressed air energy storage power generation technology is mainly that when the electricity is low, the excess electricity is stored by compressing air to certain parameters through the compressor, and when the electricity is high, the compressed air is used as medium to drive the generator through the expander (air turbine) to convert the stored energy into electric energy and input into the power grid. Therefore, for the expander (hereinafter referred to as turbine) of the compressed air energy storage unit, the starting pressure is the highest pressure of the gas storage, and with the consumption of the compressed air in the gas storage, the overall pressure is also lower and lower, so that the inlet pressure of the turbine is always decreasing, which cannot guarantee the power generation capacity and unit efficiency of the turbine generator set.

[0003] The statements herein only provide background technology related to the utility model, and do not necessarily constitute prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a composite air inlet valve group, which realizes high-pressure starting, sliding parameter operation, wide adjustment range and large pressure reduction range of the compressed air energy storage unit.

[0005] In order to achieve the above purpose, the utility model provides a composite air inlet valve group for conveying the compressed air from the gas storage to the expander, which comprises a main valve, an adjusting valve and at least one pressure reducing valve in an integrated valve housing, the main valve is communicated with the gas storage, the adjusting valve and the pressure reducing valve are communicated with the expander, and the valve cavities of the adjusting valve and the pressure reducing valve are communicated with the valve cavity of the main valve when the main valve is opened.

[0006] The main valve comprises:

[0007] The main valve inlet is arranged on the valve housing;

[0008] The main valve cavity is formed in the valve housing, the main valve cavity is communicated with the main valve inlet, and the main valve cavity is communicated with the valve cavities of the adjusting valve and the pressure reducing valve through the main valve outlet;

[0009] The main valve cover is arranged on the valve housing and extends into the main valve cavity;

[0010] The main valve rod passes through the main valve cover;

[0011] The main valve disc is connected to the end of the main valve rod extending into the main valve cavity;

[0012] a main valve spool connected to the main valve stem at an end of the main valve stem outside the valve housing.

[0013] The main valve disc has a disc cavity inside, the main valve stem has an end with a size larger than the rest of the main valve stem, the end of the main valve stem is located inside the disc cavity, the main valve disc has a disc inlet and a disc outlet respectively communicating with the disc cavity, the disc inlet communicates with the main valve chamber, and the disc outlet communicates with the main valve outlet.

[0014] The regulating valve comprises:

[0015] A regulating valve outlet provided on the valve housing;

[0016] A regulating valve chamber formed by the valve housing, the regulating valve chamber communicates with the valve chamber of the main valve, and the regulating valve chamber communicates with the regulating valve outlet;

[0017] A regulating valve cover provided on the valve housing and extending into the regulating valve chamber;

[0018] A regulating valve stem passing through the regulating valve cover;

[0019] A regulating valve disc connected to an end of the regulating valve stem extending into the regulating valve chamber;

[0020] A regulating valve oil actuator connected to an end of the regulating valve stem outside the valve housing.

[0021] The pressure reducing valve comprises:

[0022] A pressure reducing valve outlet provided on the valve housing;

[0023] A pressure reducing valve chamber formed by the valve housing, the pressure reducing valve chamber communicates with the valve chamber of the main valve, and the pressure reducing valve chamber communicates with the pressure reducing valve outlet;

[0024] A pressure reducing valve cover provided on the valve housing and extending into the pressure reducing valve chamber;

[0025] A pressure reducing valve stem passing through the pressure reducing valve cover;

[0026] A pressure reducing valve disc connected to an end of the pressure reducing valve stem extending into the pressure reducing valve chamber;

[0027] A pressure reducing valve oil actuator connected to an end of the pressure reducing valve stem outside the valve housing.

[0028] Optionally, the pressure reducing valve cover has a cover inner cylinder forming a cavity, and the pressure reducing valve disc is located inside the cavity of the cover inner cylinder.

[0029] Optionally, a gap is formed between the valve cover inner cylinder and the inner wall of the valve shell, the gap forms a first throttling annular channel to realize primary throttling; the pressure reducing valve disc moves towards the pressure reducing valve cover when the pressure reducing valve disc is opened, a second annular channel is formed between the pressure reducing valve disc and the inner wall of the valve shell to realize secondary throttling.

[0030] Optionally, one or more airfoil guide vanes are arranged on the surface of the valve cover inner cylinder facing the airflow.

[0031] Optionally, a filter screen type pressure reducing cylinder is arranged on the valve cover inner cylinder of the pressure reducing valve cover, a plurality of through holes are formed in the filter screen type pressure reducing cylinder, and the through holes are respectively connected with the pressure reducing valve cavity and the cavity of the valve cover inner cylinder.

[0032] Optionally, a labyrinth type pressure reducing cylinder is arranged on the valve cover inner cylinder of the pressure reducing valve cover, a plurality of gas passages are formed in the labyrinth type pressure reducing cylinder, the gas passages are in a labyrinth form, and the gas passages are respectively connected with the pressure reducing valve cavity and the cavity of the valve cover inner cylinder.

[0033] The compact composite intake valve group has the advantages that the structure is compact, arrangement is convenient, and the function is powerful, the main valve, the regulating valve and at least one pressure reducing valve are integrated in the integrated valve shell, after the airflow provided by the upstream gas storage is introduced into the composite intake valve group through the main valve, the airflow can be branched by the regulating valve and the pressure reducing valve according to needs to form a plurality of airflows with different pressures and flow rates to enter the downstream expansion working unit, the high-pressure air from the gas storage is introduced into the valve cavity of the composite intake valve group through the main valve inlet, when the pressure of the gas storage is high, only the regulating valve needs to be opened, and the gas is introduced into the expansion working unit through the regulating valve outlet to obtain the required unit output power. With the consumption of the gas, the pressure of the gas storage is gradually reduced, the gas pressure supplied to the composite intake valve group is also reduced, at this time, the opening degree of the regulating valve is increased with the reduction of the gas pressure to increase the air flow rate entering the expansion working unit. When the pressure of the gas storage is reduced to a certain degree, even if the regulating valve is fully opened, the flow rate to the expansion working unit cannot be continuously increased, then the pressure reducing valve is opened to supply air to the middle of the expansion working unit, and the functions of high-pressure starting, sliding parameter operation, wide regulating range and large pressure reducing range of the compressed air energy storage unit are realized through the cooperation and control of the regulating valve and the pressure reducing valve. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic view of a composite intake valve group provided by the utility model.

[0035] Figure 2 is Figure 1 the front view.

[0036] Figure 3 is Figure 2 the sectional view of A-A direction in

[0037] Figure 4 is Figure 3 a partial enlarged view in

[0038] Figure 5 is Figure 3 a sectional view in B-B direction in

[0039] Figure 6 is Figure 5 an enlarged structural view of D part in

[0040] Figure 7 is Figure 5 a partial sectional view in F-F direction in

[0041] Figure 8 is Figure 7 a perspective view of pressure reducing structure in

[0042] Figure 9 is Figure 3 a sectional view in B-B direction in

[0043] Figure 10 is Figure 9 a partial sectional view in E-E direction in

[0044] Figure 11 is Figure 10 a perspective view of pressure reducing structure in

[0045] BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0046] 1: main valve

[0047] 101: main valve chamber

[0048] 102: main valve cover

[0049] 103: main valve stem

[0050] 1031: end of main valve stem

[0051] 104: main valve disc

[0052] 1041: valve disc cavity

[0053] 1042: valve disc inlet

[0054] 1043: valve disc outlet

[0055] 105: main valve oil motor

[0056] 106: main valve inlet

[0057] 107: main valve outlet

[0058] 2: regulating valve

[0059] 201: regulating valve cavity

[0060] 202: regulating valve cover

[0061] 203: regulating valve stem

[0062] 204: regulating valve disc

[0063] 205: regulating valve inlet

[0064] 206: regulating valve outlet

[0065] 207: regulating valve oil motor

[0066] 3: pressure reducing valve

[0067] 31: first pressure reducing valve

[0068] 32: second pressure reducing valve

[0069] 301: pressure reducing valve cavity

[0070] 302: pressure reducing valve cover

[0071] 3021: valve cover inner cylinder

[0072] 3022: cavity

[0073] 303: pressure reducing valve stem

[0074] 304: pressure reducing valve disc

[0075] 305: pressure reducing valve outlet

[0076] 306: pressure reducing valve oil motor

[0077] 307: flow guide vane

[0078] 308: pressure reducing structure

[0079] 309: screen type pressure reducing cylinder

[0080] 3091: through hole

[0081] 310: labyrinth type pressure reducing cylinder

[0082] 3101: gas passage

[0083] 4: valve housing

[0084] 5: gap

[0085] 6: second annular passage DETAILED DESCRIPTION

[0086] The utility model discloses a composite intake valve group makes further detailed instructions below combining with the drawings and specific embodiment. According to the following description, the advantages and characteristics of the utility model will be more clear. It needs to be explained that the drawings adopt very simplified form and all use non-precise proportion, just to facilitate, clear and assist the purpose of explaining the embodiment of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the drawings. It is known that the structure, proportion, size etc. shown in the drawings attached to the present specification are just to cooperate with the content disclosed in the specification, for the understanding and reading of the person skilled in the art, and not to limit the limiting conditions of the implementation of the utility model, so it does not have the substantial meaning of technology, any modification of structure, change of proportion relationship or adjustment of size, under the condition of not influencing the effect and the purpose that the utility model can produce, should still fall in the range that the technical content disclosed in the utility model can cover.

[0087] The utility model on the basis of the main valve group of conventional thermal power generating unit, add pressure reducing valve on the intake valve group, and the chamber of main gas valve and regulating valve junction is optimized design, according to the overall thermodynamic and structure design of unit, the quantity and size of pressure reducing valve and pressure reducing structure can be adjusted.

[0088] As Figures 1-3 The utility model provides a composite intake valve group, it is installed on the expander (turbo), contains intake and multiple gas outlet, the intake connects gas storage (not shown in the drawing), the gas outlet connects the expansion of expander's working unit (not shown in the drawing). The composite intake valve group specifically includes: a main valve 1, a regulating valve 2 and at least one pressure reducing valve 3, the main valve 1, the regulating valve 2 and the pressure reducing valve 3 are located in the integrated valve shell 4, the valve cavity of regulating valve 2 and pressure reducing valve 3 and the valve cavity of main valve 1 are interconnected. The main valve (1) is communicated with the gas storage, the main valve 1 is located at the most upstream of air flow, according to the air flow direction (the solid arrow shown in the drawing), the regulating valve 2 and the pressure reducing valve 3 are all located at the downstream of main valve 1, and the regulating valve (2) and the pressure reducing valve (3) are communicated with the expander.

[0089] High-pressure air from the gas storage passes through the main valve inlet 106 ( Figure 1 And Figure 2 ) of the main valve 1 into the main valve 1, flows through the main valve cavity 101 ( Figure 3 ) of the main valve 1, and then passes through the main valve outlet 107 ( Figure 3 And Figure 4 ) into the pressure reducing valve cavity 301 ( Figure 5 And Figure 9 ) of the pressure reducing valve 3 and the regulating valve cavity 201 ( Figure 3). When the pressure of the gas reservoir is high, only the regulating valve 2 needs to be opened, and the gas enters the expansion work unit through the regulating valve outlet 206( Figure 1 and Figure 3 ). With the consumption of the gas, the pressure of the gas reservoir gradually decreases, and the gas pressure supplied to the inlet 106 of the main valve also decreases. At this time, the position of the regulating valve disc 204( Figure 3 ) of the regulating valve 2 needs to be changed to increase the opening of the regulating valve 2, so as to increase the air flow entering the expansion work unit. When the pressure of the gas reservoir decreases to a certain extent, even if the regulating valve 2 is fully opened, the flow to the expansion work unit cannot be increased, and the pressure reducing valve needs to be opened to supplement the gas to the expansion work unit. By opening the pressure reducing valve disc 304( Figure 5 and Figure 9 ) of the pressure reducing valve 3, part of the gas passes through the pressure reducing structure 308( Figure 5 and Figure 9 ) of the pressure reducing valve 3, enters the expansion work unit through the pressure reducing valve outlet 305, and the remaining part of the gas still passes through the regulating valve cavity 201( Figure 3 ) of the regulating valve 2, and finally enters the expansion work unit through the regulating valve outlet 206( Figure 1 and Figure 3 ) of the regulating valve 2.

[0090] In the utility model, 1-3 pressure reducing valves can be arranged to meet different requirements of pressure reduction capacity (for example, one pressure reducing valve reduces the pressure from 10MPa to 6MPa, and the other pressure reducing valve reduces the pressure from 10MPa to 4MPa) and different flow after pressure reduction (for example, one pressure reducing valve provides 30kg / s, and the other pressure reducing valve provides 50kg / s). In actual application, appropriate valve diameters and corresponding valve structures can be selected according to the thermal parameters and capacity of the unit.

[0091] As shown in Figures 1-3 , in this embodiment, the compressed air energy storage turbine unit with two-way gas supplement is taken as an example, the composite inlet valve group mainly includes a main valve 1, a regulating valve 2, two pressure reducing valves 3 and respective matching components, wherein the two pressure reducing valves are respectively referred to as a first pressure reducing valve 31 and a second pressure reducing valve 32. In this embodiment, the two pressure reducing valves 3 are arranged side by side, and the two pressure reducing valves 3 are arranged between the main valve 1 and the regulating valve 2. In other embodiments, the regulating valve 2 can also be arranged between the main valve 1 and the pressure reducing valve 3, and the regulating valve 2 and the plurality of pressure reducing valves 3 can also be arranged side by side downstream of the main valve 1, or other arrangement modes, as long as the regulating valve 2 and the pressure reducing valve 3 are located downstream of the main valve 1.

[0092] Specifically, as shown in Figures 1-3As shown, the main valve 1 includes: a main valve cavity 101 formed by a valve housing 4; a main valve cover 102 disposed on the valve housing 4 and extending into the main valve cavity 101; a main valve stem 103 passing through the main valve cover 102; and a main valve disc 104 connected to one end of the main valve stem 103 extending into the main valve cavity 101. The valve housing 4 has a main valve inlet 106, which communicates with the main valve cavity 101. The main valve cavity 101 communicates with a main valve outlet 107, which communicates with the valve cavity of the pressure reducing valve 3. One end of the main valve stem 103 located outside the valve housing 4 is connected to a main valve hydraulic actuator 105, used to drive the main valve stem 103 to drive the main valve disc 104 to reciprocate within the main valve cavity 101. In this embodiment, as... Figure 4 As shown, the main valve disc 104 is a lift-type stop valve with a pre-opening valve structure, used to close or open the main valve outlet 107. Unlike ordinary valve discs, the main valve disc 104 is not fixedly connected to the main valve stem 103. Instead, the main valve disc 104 has a valve disc cavity 1041 inside, which serves as the pre-opening valve cavity. The main valve disc 104 is sleeved on the end 1031 of the main valve stem 103, with the end 1031 of the main valve stem 103 located within the valve disc cavity 1041. The main valve disc 104 has valve disc inlets that communicate with the valve disc cavity 1041. The valve disc has an air inlet 1042 and an air outlet 1043. The air inlet 1042 of the valve disc is connected to the main valve chamber 101, and the air outlet 1043 of the valve disc is connected to the main valve outlet 107. The size of the end 1031 of the main valve stem 103 is larger than the size of the rest of the main valve stem 103 to prevent the end 1031 from detaching from the valve disc chamber 1041. The end 1031 serves as a pre-opening valve disc, used to close or open the air outlet 1043 of the valve disc. The main valve 1 adopts a lift-type shut-off valve with a pre-opening valve structure. The pre-opening valve disc is set as a small regulating valve with good linearity of flow characteristics. During high-pressure startup, it serves as a supplement to the large-diameter regulating valve 2 to jointly complete the high-pressure startup.

[0093] like Figure 3As shown, the regulating valve 2 comprises a regulating valve cavity 201 formed by a valve housing 4, a regulating valve cover 202 arranged on the valve housing 4 and extending into the regulating valve cavity 201, a regulating valve stem 203 passing through the regulating valve cover 202, and a regulating valve disc 204 connected to one end of the regulating valve stem 203 extending into the regulating valve cavity 201. The regulating valve cavity 201 is in communication with a regulating valve inlet 205 and a regulating valve outlet 206 respectively, the regulating valve inlet 205 is in communication with the valve cavities of the first pressure reducing valve 31 and the second pressure reducing valve 32, and the regulating valve outlet 206 is arranged on the valve housing 4. The regulating valve stem 203 is connected to a regulating valve oil actuator 207 at one end outside the valve housing 4, which is used to drive the regulating valve stem 203 to move the regulating valve disc 204 back and forth in the regulating valve cavity 201, so that the regulating valve disc 204 closes or opens the regulating valve outlet 206. In this embodiment, the regulating valve disc 204 is a lift type stop valve, and the movement of the regulating valve disc 204 in the regulating valve cavity 201 changes the size of the annular passage formed between the regulating valve disc 204 and the valve housing 4, thereby changing the gas flow through the regulating valve outlet 206 to meet the operation requirements of large-capacity units.

[0094] The internal structure and working principle of the pressure reducing valve 3 are described in detail below, and since the structures of the first pressure reducing valve 31 and the second pressure reducing valve 32 are basically the same, the same reference numerals are used to represent the parts with the same functions in the first pressure reducing valve 31 and the second pressure reducing valve 32. In the following description, the pressure reducing valve mentioned can represent both the first pressure reducing valve 31 and the second pressure reducing valve 32.

[0095] In one embodiment of the utility model, as Figure 5As shown, the pressure reducing valve 3 (first pressure reducing valve 31 or second pressure reducing valve 32) comprises a pressure reducing valve cavity 301 formed by a valve housing 4, a pressure reducing valve cover 302 arranged on the valve housing 4 and extending into the pressure reducing valve cavity 301, a pressure reducing valve stem 303 passing through the pressure reducing valve cover 302, and a pressure reducing valve disc 304 connected to one end of the pressure reducing valve stem 303 extending into the pressure reducing valve cavity 301. The pressure reducing valve cavity 301 is in communication with a pressure reducing valve inlet (i.e. downstream of the main valve outlet 107) and a pressure reducing valve outlet 305, respectively, the pressure reducing valve inlet is in communication with the main valve outlet 107, the pressure reducing valve outlet 305 is arranged on the valve housing 4, and the pressure reducing valve cavity 301 is also in communication with the regulating valve inlet 205. The other end of the pressure reducing valve stem 303 outside the valve housing 4 is connected to a pressure reducing valve oil actuator 306 for driving the pressure reducing valve stem 303 to move the pressure reducing valve disc 304 back and forth in the pressure reducing valve cavity 301, so that the pressure reducing valve disc 304 closes or opens the pressure reducing valve outlet 305. Similarly, the movement of the pressure reducing valve disc 304 in the pressure reducing valve cavity 301 changes the size of the annular passage formed between the pressure reducing valve disc 304 and the valve housing 4, thereby changing the gas flow through the pressure reducing valve outlet 305 to meet the operating requirements of the unit.

[0096] For a pressure reducing valve with a small pressure drop, the pressure reducing valve cover 302 has an inner valve cover cylinder 3021 forming a cavity 3022, and the pressure reducing valve disc 304 is located inside the cavity 3022 of the inner valve cover cylinder 3021, i.e. the inner valve cover cylinder 3021 surrounds the outer sidewall of the pressure reducing valve disc 304. As shown, Figure 6 The gap 5 between the inner valve cover cylinder 3021 and the inner wall of the valve housing 4 forms a first throttling annular passage for primary throttling, and the pressure reducing valve disc 304 moves towards the pressure reducing valve cover 302 when it is opened, and a second annular passage 6 is formed between the pressure reducing valve disc 304 and the inner wall of the valve housing 4 for secondary throttling. The secondary throttling technology of the valve significantly optimizes the fluid control performance by gradually decomposing the pressure difference.

[0097] As shown, Figure 5 In this embodiment, one or more airfoil guide vanes 307 are further arranged on the surface of the inner valve cover cylinder 3021 of the pressure reducing valve cover 302 facing the airflow to guide the airflow and minimize the impact on the main airflow, avoiding turbulence of the air in the throat of the pressure reducing valve.

[0098] For a pressure reducing valve with a large pressure drop, pressure reduction is achieved by arranging a pressure reducing structure 308 on the inner valve cover cylinder 3021 of the pressure reducing valve cover 302. In this embodiment, as shown, Figure 7 and Figure 8As shown, the pressure reduction structure 308 adopts a filter screen type pressure reduction cylinder 309, which has a plurality of through holes 3091, each of which communicates the pressure reduction valve cavity 301 and the cavity 3022 of the valve cover inner cylinder 3021. When the gas flow passes through the pressure reduction structure 308, the through holes 3091 cause the gas flow to have a pressure loss, i.e. to achieve pressure reduction, and the through holes 3091 can guide the gas flow, reducing turbulence and vortex.

[0099] In another embodiment, as shown in FIG. 6, the pressure reduction structure 308 adopts a labyrinth type pressure reduction cylinder 310, which has a plurality of gas passages 3101 in the form of a labyrinth, each of which communicates the pressure reduction valve cavity 301 and the cavity 3022 of the valve cover inner cylinder 3021. When the gas flow passes through the pressure reduction structure 308, the gas passages 3101 increase the length of the gas flow path and the along-path loss, further reducing the pressure of the gas and achieving a better pressure reduction effect. Figures 9-11

[0100] In specific applications, the first pressure reduction valve 31 and the second pressure reduction valve 32 can also adopt different pressure reduction structures to achieve different pressure reductions, thereby supplying air to different positions inside the expansion work unit. The positions of the pressure reduction valve 3 and the regulating valve 2 can also be adjusted relative to each other.

[0101] Due to the particularity of the operating conditions of the air turbine, the pressure reduction valve needs to have a large range of precise adjustment capability, so the head of the valve disc of the pressure reduction valve adopts the traditional regulating valve profile and structure.

[0102] ​The compact composite intake valve group has the advantages of compact structure, convenient arrangement and powerful function, the main valve, the regulating valve and at least one pressure reducing valve are integrated in the integrated valve shell, after the gas flow provided by the upstream gas storage is entered into the composite intake valve group through the main valve, the gas flow can be branched by the regulating valve and the pressure reducing valve according to requirements to form multiple gas flows with different pressures and flow rates to enter the downstream expansion power unit, the high-pressure air from the gas storage is entered into the valve cavity of the composite intake valve group through the main valve inlet, when the pressure of the gas storage is relatively high, only the regulating valve needs to be opened, and the gas is entered into the expansion power unit through the regulating valve outlet to obtain the required unit output power, along with the consumption of the gas, the pressure of the gas storage is gradually reduced, and the gas pressure supplied to the composite intake valve group is also reduced, at this time, the opening degree of the regulating valve is increased along with the reduction of the gas pressure, so that the air flow entering the expansion power unit is increased, when the pressure of the gas storage is reduced to a certain degree, even if the regulating valve is fully opened, the flow to the expansion power unit cannot be increased, then the pressure reducing valve is opened to supply air to the middle of the expansion power unit, and the functions of high-pressure starting, sliding parameter operation, wide adjustment range and large pressure reduction range of the compressed air energy storage unit are realized through the cooperation and control of the regulating valve and the pressure reducing valve.

[0103] In the description of the utility model, need understanding, the orientation or positional relation that the terms "center", "height", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" indicate is based on the orientation or positional relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0104] In the description of the utility model, unless another definite provision and limitation, the term "installation", "link", "connection", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element mutual action relationship.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0105] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features directly contact, also can include that first and second features are not directly contact but contact through additional feature between them.Moreover, first feature is "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or just indicates that the horizontal height of first feature is higher than second feature.First feature is "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or just indicates that the horizontal height of first feature is less than second feature.

[0106] Although the content of the utility model has been introduced in detail by the above preferred embodiment, it should be recognized that the above description should not be considered as the limitation of the utility model.After the above content is read by the person skilled in the art, the various modifications and substitutions of the utility model will be obvious.It is therefore that the protection scope of the utility model should be limited by the attached claims.

Claims

1. A composite intake valve assembly for conveying compressed air from an air storage tank to an expander, characterized in that, The composite intake valve assembly includes: a main valve (1) located in an integrated valve housing (4), a regulating valve (2), and at least one pressure reducing valve (3). The main valve (1) is connected to the gas storage tank, and the regulating valve (2) and the pressure reducing valve (3) are connected to the expander. When the main valve (1) is open, the valve chambers of the regulating valve (2) and the pressure reducing valve (3) are connected to the valve chamber of the main valve (1).

2. The composite intake valve assembly as described in claim 1, characterized in that, The main valve (1) includes: The main valve inlet (106) is provided on the valve body (4); The main valve chamber (101) formed by the valve housing (4) is connected to the main valve inlet (106), and the main valve chamber (101) is connected to the valve chamber of the regulating valve (2) and the valve chamber of the pressure reducing valve (3) through the main valve outlet (107); A main valve cover (102) is disposed on the valve housing (4) and extends into the main valve chamber (101); The main valve stem (103) passes through the main valve cover (102); A main valve disc (104) is connected to one end of the main valve stem (103) that extends into the main valve chamber (101); A main valve hydraulic actuator (105) is connected to the main valve stem (103) at the end located outside the valve housing (4).

3. The composite intake valve assembly as described in claim 2, characterized in that, The main valve disc (104) has a valve disc cavity (1041) inside. The main valve disc (104) is sleeved on the end (1031) of the main valve stem (103). The size of the end (1031) of the main valve stem (103) is larger than the size of the rest of the main valve stem (103). The end (1031) of the main valve stem (103) is located inside the valve disc cavity (1041). The main valve disc (104) has a valve disc air inlet (1042) and a valve disc air outlet (1043) that are respectively connected to the valve disc cavity (1041). The valve disc air inlet (1042) is connected to the main valve cavity (101), and the valve disc air outlet (1043) is connected to the main valve outlet (107).

4. The composite intake valve assembly as described in claim 1, characterized in that, The regulating valve (2) comprises: The regulating valve outlet (206) is provided on the valve body (4); The regulating valve chamber (201) formed by the valve housing (4) is connected to the valve chamber of the main valve (1) and is connected to the outlet (206) of the regulating valve. A regulating valve cover (202) is disposed on the valve housing (4) and extends into the regulating valve cavity (201); The regulating valve stem (203) passes through the regulating valve cover (202); A regulating valve disc (204) is connected to one end of the regulating valve stem (203) that extends into the regulating valve cavity (201); A regulating valve hydraulic actuator (207) is connected to the regulating valve stem (203) at the end located outside the valve housing (4).

5. The composite intake valve assembly as described in claim 1, characterized in that, The pressure reducing valve (3) comprises: The pressure reducing valve outlet (305) is provided on the valve body (4); The pressure reducing valve chamber (301) formed by the valve housing (4) is connected to the valve chamber of the main valve (1) and is connected to the pressure reducing valve outlet (305). A pressure reducing valve cover (302) is disposed on the valve housing (4) and extends into the pressure reducing valve cavity (301); The pressure reducing valve stem (303) passes through the pressure reducing valve cover (302); A pressure reducing valve disc (304) is connected to one end of the pressure reducing valve stem (303) that extends into the pressure reducing valve cavity (301); A pressure reducing valve hydraulic actuator (306) is connected to the end of the pressure reducing valve stem (303) located outside the valve housing (4).

6. The composite intake valve assembly as described in claim 5, characterized in that, The pressure reducing valve cover (302) has a valve cover inner cylinder (3021), the valve cover inner cylinder (3021) forms a cavity (3022), and the pressure reducing valve disc (304) is located inside the cavity (3022) of the valve cover inner cylinder (3021).

7. The composite intake valve assembly as described in claim 6, characterized in that, There is a gap (5) between the inner cylinder (3021) of the valve cover and the inner wall of the valve shell (4). The gap (5) forms a first throttling annular channel to achieve primary throttling. When the pressure reducing valve disc (304) is opened, it moves toward the pressure reducing valve cover (302). A second annular channel (6) is formed between the pressure reducing valve disc (304) and the inner wall of the valve shell (4) to achieve secondary throttling.

8. The composite intake valve assembly as described in claim 6, characterized in that, One or more airfoil-shaped guide vanes (307) are provided on the surface of the inner cylinder (3021) of the valve cover on the side facing the airflow.

9. The composite intake valve assembly as described in claim 6, characterized in that, A filter-type pressure-reducing cylinder (309) is provided on the inner cylinder (3021) of the pressure-reducing valve cover (302). The filter-type pressure-reducing cylinder (309) has multiple through holes (3091), which are respectively connected to the pressure-reducing valve cavity (301) and the cavity (3022) of the inner cylinder (3021) of the valve cover.

10. The composite intake valve assembly as described in claim 6, characterized in that, A labyrinth-type pressure reducing cylinder (310) is provided on the inner cylinder (3021) of the pressure reducing valve cover (302). The labyrinth-type pressure reducing cylinder (310) has multiple gas channels (3101), which are in the form of a labyrinth. The gas channels (3101) are respectively connected to the pressure reducing valve cavity (301) and the cavity (3022) of the inner cylinder (3021) of the valve cover.

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