Combination valve for 35MPa locomotive
By designing a locomotive combination valve for 35MPa, a variety of pressure reduction and discharge devices are integrated, which solves the problems of high costs, large space occupation and inability to meet the pressure fluctuation range in the prior art, and achieves stable pressure reduction and safety of hydrogen Release reduces production costs.
Patent Information
- Application Number
- CN202411769687.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-02-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing locomotive valves have problems with high cost and large space occupation in the hydrogen energy field. At the same time, the fluctuation range of the outlet pressure of the pressure reducing valve cannot meet the requirements of the downstream stack.
A locomotive combination valve for 35MPa was designed, integrating overpressure discharge function, overtemperature discharge device with glass bead structure, primary and secondary pressure reducing device, overpressure discharge valve and manual shut-off valve, etc. These devices achieve stable decompression and safe discharge of hydrogen.
The stable pressure reduction of hydrogen is achieved, ensuring that the cylinder pressure does not exceed the set value, avoiding the risk of explosion, and reducing production costs.
Smart Images
Figure CN119435972A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of valves, and in particular relates to a combination valve for 35MPa locomotives. Background Art
[0002] At present, there are two types of locomotive valves used in locomotives, motorcycles, bicycles and mobile power supplies in the field of hydrogen energy. One is to realize the function through the existing drone valves, but the use of drone valves will increase the cost; the other is to use separate stop valves, one-way valves, and pressure reducing valves to achieve the function through pipeline connections. The use of valves with independent functions will take up a large space, and the fluctuation range of the pressure reducing valve outlet pressure cannot meet the requirements of the downstream fuel cell stack. Summary of the invention
[0003] The purpose of the present invention is to provide a 35MPa locomotive combination valve, which is suitable for locomotives, motorcycles, bicycles and mobile power supplies in the field of hydrogen energy. It can be directly connected to a hydrogen storage cylinder and can reduce the 35MPa hydrogen pressure inside the hydrogen storage cylinder to 50±10KPa to provide hydrogen to the downstream hydrogen fuel cell stack.
[0004] The technical solution of the present invention is as follows: a combination valve for 35MPa locomotives, comprising a shell, the shell comprising an upper shell part and a lower shell part, the upper shell part is respectively provided with an outlet adapter and a manual stop valve, the upper shell part is provided with a secondary pressure reducing device, the lower shell part is provided with an overpressure relief valve, a primary pressure reducing device, an over-temperature relief device, a first plug and a one-way inflation valve, and the lower end of the lower shell part is a gas cylinder docking port.
[0005] Preferably, a plurality of cavities are formed in the upper portion and the lower portion of the shell.
[0006] Preferably, an over-temperature relief device is provided in a cavity at the lower part of the shell, and the over-temperature relief device includes a plunger, a glass bead and a cap. The cap is connected to the port of the cavity, and a blind hole is opened inside the cap. The plunger is a columnar structure with two sections of different diameters, and the end with a smaller diameter fits tightly with the cavity, and the end with a larger diameter of the plunger has a blind hole inside. A glass bead is arranged between the blind hole of the cap and the blind hole of the plunger.
[0007] Preferably, a first-level pressure reducing device is arranged in a cavity in the lower part of the shell, and the first-level pressure reducing device includes a first-level plug, a first-level valve stem and a first-level spring. The first-level plug is connected to the end of the cavity, and a first-level valve stem is arranged in the cavity in the lower part of the shell below the first-level plug. A through hole is opened in the first-level valve stem, and the first-level valve stem has a head and a rod-shaped portion. The rod-shaped portion of the first-level valve stem is covered with a first-level spring.
[0008] Preferably, an overpressure relief valve is arranged in a cavity at the lower part of the shell, the overpressure relief valve comprises a relief valve core, a relief spring and a relief shell, the relief shell is connected to the cavity, a blind hole is opened inside the relief shell, the relief valve core is mounted in the blind hole, a blind hole is opened on the relief valve core, and the relief spring is installed between the blind hole of the relief valve core and the blind hole of the relief shell.
[0009] Preferably, a blind hole is opened on the top of the shell, and an ED plug is connected in the blind hole.
[0010] Preferably, a secondary pressure reducing device is arranged in a cavity in the upper part of the shell, and the secondary pressure reducing device comprises a secondary spring, a secondary end cover, a secondary valve seat and a secondary valve stem, wherein the secondary valve seat is in the cavity, the middle of the secondary valve seat is a hollow cylindrical portion, the outer side of the cylindrical portion is sleeved with a secondary spring, the cylindrical portion is inserted with a secondary valve stem, the secondary valve stem has a head and a rod-shaped portion, and the rod-shaped portion is inserted into the cylindrical portion of the secondary valve seat, the outer side of the secondary valve stem is sleeved with a secondary end cover, the secondary end cover is connected to the cavity, and the middle of the rod-shaped portion of the secondary valve stem has a channel parallel and perpendicular to the axial direction, respectively, and the axial channel and the vertical channel are interconnected.
[0011] Preferably, a one-way inflation valve is arranged in a cavity at the lower part of the shell, and the one-way inflation valve comprises a one-way valve adapter, a spring nut, a one-way valve spring, a one-way valve core, a second filter plate, a jacket nut and a ball plug, wherein the spring nut is connected in the cavity, a through hole is opened in the middle of the spring nut, one end of which is connected to an end cover, a head of the one-way valve adapter, the head of the one-way valve adapter is connected to the cavity through a thread, the head of the one-way valve adapter has a cavity, a columnar one-way valve core is arranged in the cavity, and the one-way valve core is opened on one side of the end cover close to the spring nut. There is a blind hole, a one-way valve spring is arranged in the blind hole, the one-way valve adapter has a head, an outer convex part and an interface end, a cavity is opened in the interface end of the one-way valve adapter, a second filter is installed in the cavity, the outside of the interface end of the one-way valve adapter is sleeved in the outer sleeve nut, a through hole is opened in the middle of the outer sleeve nut, a ball plug is sleeved in the through hole, one end of the ball plug is tightly fitted with the cavity opening of the interface end of the one-way valve adapter, one end of the ball plug extends out of the through hole of the outer sleeve nut, and the head of the ball plug is clamped between the outer sleeve nut and the interface end of the one-way valve adapter.
[0012] Preferably, a through hole is formed at the gas cylinder docking interface on the shell, and a first filter is installed at the port of the gas cylinder docking interface.
[0013] Preferably, a manual stop valve is arranged in a cavity in the upper part of the shell, and the manual stop valve comprises a stop valve nut, a stop valve stem, a stop moving bolt and a stop valve handle, wherein the stop valve nut extends into the cavity and is connected in the cavity, the stop valve stem is sleeved in the middle of the stop valve nut, the head of the stop valve stem is tightly fitted with the inner wall of the cavity, the end of the stop valve stem is sleeved with the stop valve handle, the end of the stop valve stem is provided with a through hole perpendicular to the axial direction, the through hole is installed with a stop moving bolt, and the stop moving bolt simultaneously passes through the side wall surface of the stop valve handle sleeved on the end of the stop valve stem.
[0014] The beneficial effects of the present invention are: an overpressure relief function is integrated. When the pressure exceeds a certain value, the relief device of the first-stage pressure reducing valve will automatically open to ensure that the pressure of the gas cylinder does not exceed the set value; an over-temperature relief device with a glass bead structure is used internally. When the product and the gas cylinder are in a high-temperature environment, the combustible gas inside the gas cylinder is automatically released to avoid explosion; two high-pressure ends are left, and a pressure gauge and a sensor can be installed to facilitate observation of the pressure inside the gas cylinder; the filling port contains a one-way valve function, and the outlet thread is a conventional NPT1 / 4 internal thread, and different adapters can be customized according to needs. The internal parts of the present invention are simple in structure, easy to produce, and can effectively reduce costs. The manual stop valve function has a simple structure and is suitable for pressures below 5Mpa, which can better save costs and is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of a first-view of a combination valve for a 35MPa locomotive provided by the present invention; Figure 2 A schematic diagram of a second viewing angle of a 35MPa locomotive combination valve provided by the present invention; Figure 3 A cross-sectional view from the first perspective of a 35MPa locomotive combination valve provided by the present invention; Figure 4 A cross-sectional view from a second perspective of a 35MPa locomotive combination valve provided by the present invention; Figure 5 This is a cross-sectional view from a third perspective of a 35MPa locomotive combination valve provided by the present invention.
[0016] In the figure: 1 housing, 2 first O-ring, 3 first opening retaining ring, 4 plunger, 5 glass bead, 6 cap, 7 primary plug, 8 second O-ring, 9 primary valve stem, 10 second opening retaining ring, 11 third O-ring, 12 primary spring, 13 third opening retaining ring, 14 fourth O-ring, 15 discharge valve core, 16 discharge spring, 17 discharge housing, 18 first filter, 19 fifth O-ring, 20 first plug, 21 ED plug, 22 seventh O-ring, 23 eighth O-ring, 24 fourth opening retaining ring, 25 secondary spring, 26 secondary end cover, 27 secondary valve seat, 28 secondary valve stem, 29 ninth O-ring, 30 The fifth opening retaining ring, 31 the tenth O-ring, 32 the sixth opening retaining ring, 33 the one-way valve adapter, 34 the spring nut, 35 the one-way valve spring, 36 the one-way valve core, 37 the second filter plate, 38 the outer sleeve nut, 39 the ball head plug, 40 the outlet adapter, 41 the eleventh O-ring, 42 the seventh opening retaining ring, 43 the stop valve nut, 44 the stop valve stem, 45 the stop moving bolt, 46 the stop valve handle, 102 the second pressure reducing device, 103 the one-way inflation valve, 104 the overpressure relief valve, 105 the manual stop valve, 106 the first pressure reducing device, 107 the gas cylinder docking port, 108 the over-temperature relief device, 109 the second plug. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0018] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The meaning of "multiple" in the present invention is two or more, unless otherwise clearly and specifically limited.
[0020] like Figure 1 and 2 As shown, a combination valve for 35MPa locomotives includes a housing 1, the housing 1 includes two parts: an upper housing part 110 and a lower housing part 111, wherein the upper housing part 110 is in a "convex" shape, and an outlet adapter 40 and a manual stop valve 105 are respectively arranged on both sides of the convex shape of the upper housing part 110, and a secondary pressure reducing device 102 is arranged on the top of the convex shape of the upper housing part 110, and the lower housing part 111 is in a square structure, and an overpressure relief valve 104 is arranged on one side thereof, and A first-stage pressure reducing device 106, an over-temperature relief device 108 and a first plug 20 are arranged on the side adjacent to the side where the over-pressure relief valve 104 is arranged, wherein the first-stage pressure reducing device 106 and the over-temperature relief device 108 are located on both sides of the second plug 109, and a one-way inflation valve 103 is arranged on the side opposite to the lower part 111 of the shell where the first-stage pressure reducing device 106, the over-temperature relief device 108 and the second plug 109 are arranged, and the lower end of the lower part 111 of the shell is the gas cylinder docking port 107.
[0021] like Figure 3 As shown, a plurality of cylindrical cavities are formed on the lower portion 111 of the housing.
[0022] An over-temperature relief device 108 is arranged in one of the cavities, and the over-temperature relief device 108 includes a first O-ring 2, a first open retaining ring 3, a plunger 4, a glass bead 5 and a cap. The cap 6 is connected to the port of the cavity through a threaded structure, and a blind hole is opened inside the cap 6. The plunger 4 is a columnar structure with two sections of different diameters, and the end with a smaller diameter fits tightly with the cavity, and a groove is opened on it, and the first O-ring 2 and the first open retaining ring 3 are arranged in the groove. A blind hole is opened inside the end of the plunger 4 with a larger diameter, and a long glass bead 5 is arranged between the blind hole of the cap 6 and the blind hole of the plunger 4, and the two ends of the glass bead 5 respectively penetrate into the blind hole of the cap 6 and the blind hole of the plunger 4.
[0023] A first-stage pressure reducing device 106 is arranged in a cavity at the lower part 111 of the shell, and the first-stage pressure reducing device 106 comprises a first-stage plug 7, a second O-ring 8, a first-stage valve stem 9, a second open retaining ring 10, an O-ring 11, a first-stage spring 12, a third open retaining ring 13 and a fourth O-ring 14, wherein the first-stage plug 7 is connected to the end of the cavity by a thread, a groove is provided on the first-stage plug 7, a second O-ring 8 is arranged in the groove and between the first-stage plug 7 and the cavity, and the second O-ring 8 is located between the first-stage plug 7 and the cavity to play a sealing role, and the first-stage plug 7 is located below the shell. A first-stage valve stem 9 is arranged in the cavity of the lower part 111, and a through hole is opened in the first-stage valve stem 9. The first-stage valve stem 9 is a screw-shaped structure with a head and a rod-shaped part. A groove is opened at the side end of the head of the first-stage valve stem 9, and a second open retaining ring 10 and a third O-ring 11 are arranged in the groove. A first-stage spring 12 is sheathed on the rod-shaped part of the first-stage valve stem 9, and both ends of the first-stage spring 12 are respectively restricted by the head of the first-stage valve stem 9 and the cavity wall of the cavity. The end of the rod-shaped part of the first-stage valve stem 9 is tightly fitted with the cavity and a groove is opened thereon, and three open retaining rings 13 and a fourth O-ring 14 are arranged in the groove.
[0024] An overpressure relief valve 104 is arranged in a cavity in the lower part 111 of the shell. The overpressure relief valve 104 includes a relief valve core 15, a relief spring 16 and a relief shell 17. The relief shell 17 is a bolt-like structure and is connected to the cavity through threads. A blind hole is opened inside the relief shell 17, and a columnar relief valve core 15 is installed in the blind hole. A blind hole is opened on the relief valve core 15, and the relief spring 16 is installed between the blind hole of the relief valve core 15 and the blind hole of the relief shell 17.
[0025] A gas cylinder docking port 107 is provided in a cavity in the lower portion 111 of the shell.
[0026] A first plug 20 is disposed in a cavity in the lower portion 111 of the housing, and a sealing ring is disposed between the plug and the cavity.
[0027] Among them, the cavity in which the over-temperature relief device 108 is provided on the lower part 111 of the shell is connected with the outside of the shell 1 and the cavity in which the gas cylinder docking port 107 is provided through channels respectively; the cavity in which the over-pressure relief valve 104 is provided on the lower part 111 of the shell is connected with the cavity in which the first-stage pressure reducing device 106 is provided through a channel, and the cavity in which the first-stage pressure reducing device 106 is provided on the lower part 111 of the shell is connected with the cavity in which the gas cylinder docking port 107 is provided through a channel; the cavity in which the plug 20 is provided on the lower part 111 of the shell is connected with the cavity in which the gas cylinder docking port 107 is provided through a channel.
[0028] like Figure 4As shown, the upper part 110 of the shell body is provided with a plurality of cavities, in one of which a secondary pressure reducing device 102 is arranged, and the secondary pressure reducing device 102 comprises a seventh O-ring 22, an eighth O-ring 23, a fourth open retaining ring 24, a secondary spring 25, a secondary end cover 26, a secondary valve seat 27, a secondary valve stem 28, a ninth O-ring 29 and a fifth open retaining ring 30, wherein the secondary valve seat 27 is connected to the cavity by a thread, and the seventh O-ring 22 is arranged in the cavity wall surface contacting the secondary valve seat 27, the middle of the secondary valve seat 27 is a hollow cylindrical portion, the outer side of the cylindrical portion is sleeved with the secondary spring 25, the cylindrical portion is inserted with the secondary valve stem 28, the secondary valve stem 28 has a head and a rod-shaped portion, and its rod-shaped portion is inserted into the cylindrical portion of the secondary valve seat 27, and the secondary valve A groove is formed on the rod-shaped portion of the rod 28, in which an eighth O-ring 23 and a fourth open retaining ring 24 are arranged, two ends of the secondary spring 25 respectively abut against the secondary valve seat 27 and the head of the secondary valve stem 28, a secondary end cover 26 is sleeved on the outer side of the secondary valve stem 28, and the secondary end cover 26 is connected to the cavity by threads, a groove is formed on the head of the secondary valve stem 28, in which a ninth O-ring 29 and a fifth open retaining ring 30 are arranged, a channel parallel to and perpendicular to the axial direction is respectively formed in the middle of the rod-shaped portion of the secondary valve stem 28, the axial channel and the vertical channel are interconnected, the middle part of the rod-shaped portion of the secondary valve stem 28 is tightly fitted with the inside of the cylindrical portion of the secondary valve seat 27, and there is a gap between the head of the rod-shaped portion of the secondary valve stem 28 with the vertical channel and the cylindrical portion of the secondary valve seat 27.
[0029] The cavity of the secondary pressure reducing device 102 disposed on the upper portion 110 of the shell is also connected to the primary pressure reducing device 106 through a channel. The gas first passes through the primary pressure reducing device, then flows into the secondary pressure reducing device, and finally flows out from the outlet.
[0030] A one-way inflation valve 103 is arranged in a cavity at the lower part 111 of the shell, and the one-way inflation valve 103 includes a tenth O-ring 31, a sixth open retaining ring 32, a one-way valve adapter 33, a spring nut 34, a one-way valve spring 35, a one-way valve core 36, a second filter plate 37, a jacket nut 38 and a ball plug 39, wherein the spring nut 34 is connected in the cavity by a thread, a through hole is opened in the middle of the spring nut 34, and an end cover is connected to one end of the one-way valve adapter 33. The head of the one-way valve adapter 33 is connected in the cavity by a thread, a groove is opened in the head of the one-way valve adapter 33, and the tenth O-ring 31 is arranged in the groove, the sixth open retaining ring 32, the head of the one-way valve adapter 33 is opened in the cavity, a columnar one-way valve core 36 is arranged in the cavity, and the one-way valve core 36 is close to the spring nut 34. A blind hole is provided on one side of the end cover, and a one-way valve spring 35 is arranged in the blind hole. One end of the one-way valve spring 35 abuts against the end cover of the spring nut 34, and the other end of the one-way valve spring 35 abuts against the one-way valve core 36. The one-way valve adapter 33 has a head, an outer convex portion and an interface end. A cavity is provided in the interface end of the one-way valve adapter 33, and a second filter plate 37 is installed in the cavity. The outside of the interface end of the one-way valve adapter 33 is threadedly sleeved in the outer sleeve nut 38. A through hole is provided in the middle of the outer sleeve nut 38, and a ball plug 39 is sleeved in the through hole. One end of the ball plug 39 is tightly fitted with the cavity opening of the interface end of the one-way valve adapter 33, and one end of the ball plug 39 extends out of the through hole of the outer sleeve nut 38. The head of the ball plug 39 is clamped between the outer sleeve nut 38 and the interface end of the one-way valve adapter 33.
[0031] The gas cylinder docking port 107 on the housing 1 is provided with a through hole, a first filter 18 is installed at the port of the gas cylinder docking port 107 , a groove is provided outside the gas cylinder docking port 107 , and a fifth O-ring 19 is arranged in the groove.
[0032] A blind hole is formed on the top of the housing 1, and an ED plug 21 is threadedly connected in the blind hole.
[0033] A horizontal cavity and a vertical cavity are respectively opened on the side opposite to the one-way inflation valve 103 on the shell 1, a first plug 20 is arranged in the horizontal cavity, a second plug 109 is arranged in the vertical cavity, the vertical cavity is connected with the horizontal cavity through a channel, the horizontal cavity is connected with the cavity provided with the one-way inflation valve 103 through a channel, and the through hole in the gas cylinder docking port 107 is connected with the channel between the cavity provided with the first plug 20 and the one-way inflation valve 103.
[0034] like Figure 5As shown, a manual stop valve 105 is arranged in a cavity of the upper part 110 of the shell, and the manual stop valve 105 includes an eleventh O-ring 41, a seventh open retaining ring 42, a stop valve nut 43, a stop valve stem 44, a stop moving bolt 45 and a stop valve handle 46, wherein the stop valve nut 43 extends into the cavity and is connected in the cavity by threads, the stop valve stem 44 is sleeved in the middle of the stop valve nut 43, the head of the stop valve stem 44 is provided with a groove, the eleventh O-ring 41 and the seventh open retaining ring 42 are arranged in the groove, the head of the stop valve stem 44 is tightly fitted with the inner wall of the cavity, the end of the stop valve stem 44 is sleeved with a stop valve handle 46, the end of the stop valve stem 44 is provided with a through hole perpendicular to the axial direction, the stop moving bolt 45 is installed in the through hole, and the stop moving bolt 45 simultaneously passes through the side wall of the stop valve handle 46 sleeved on the end of the stop valve stem 44.
[0035] An outlet adapter 40 is installed in a cavity of the upper portion 110 of the housing.
[0036] The cavity in the upper portion 110 of the shell in which the secondary pressure reducing device is installed is communicated with the cavity in which the outlet adapter 40 is installed and the cavity in which the manual stop valve 105 is installed through channels.
[0037] The assembly process of the present invention is as follows: a. The first O-ring 2 and the first opening retaining ring 3 are first installed on the plunger 4 and then pressed into the housing 1, and then the glass beads 5 are put in, and the cap 6 is screwed on, and the over-temperature relief device 108 is assembled.
[0038] b. The third open retaining ring 13, the fourth O-ring 14, the second open retaining ring 10, and the third O-ring 11 are installed on the primary valve stem 9, and then the primary spring 12 is inserted into the primary valve stem 9 and placed into the housing 1 together, and then the second O-ring 8 is inserted into the primary plug 7 and screwed into the housing 1 together. The primary pressure reducing device 106 is assembled.
[0039] c. Place the relief valve core 15 and the relief spring 16 into the relief housing 17, and then screw them into the housing 1. The overpressure relief valve 104 is assembled.
[0040] d. Place the seventh O-ring 22 into the housing 1, then screw the secondary valve seat 27 into the housing, then put the secondary spring 25, then place the secondary valve stem 28 equipped with the eighth O-ring 23, the fourth open retaining ring 24, the ninth O-ring 29, and the fifth open retaining ring 30 into the housing 1, and finally screw the secondary end cover 26 onto the housing 1. The secondary pressure reducing device 102 is assembled.
[0041] e. Install the tenth O-ring 31 and the sixth opening retaining ring 32 on the one-way valve adapter 33, then put in the one-way valve core 36 and the one-way valve spring 35 in turn, and then screw the spring nut 34 into the one-way valve adapter 33, and then press the filter 37 into the one-way valve adapter 33, and install the outer nut 38 and the ball plug 39. Finally, screw the one-way valve adapter 33 with all the parts installed into the housing 1. The one-way inflation valve 103 is assembled.
[0042] f. Install the eleventh O-ring 41 and the seventh open retaining ring 42 on the stop valve stem 44, then assemble the stop valve nut 43 with the stop valve stem 44, screw them into the housing 1 together, then insert the stop valve handle 46 into the stop valve stem 44, and fix it with the stop bolt 45. The manual stop valve 105 is assembled.
[0043] g. Install the remaining parts on the housing 1, screw the first plug 20 and the second plug 109 including O-rings, and the ED plug 21 including O-rings into the housing, and finally insert the fifth O-ring 19 and the first filter 18 into the housing 1. Finally, install the outlet adapter 40 (the size of the outlet adapter can be customized as required).
[0044] The characteristics of the present invention are as follows: 1. Overall solution structure, the product needs to be used together with the gas cylinder. The gas enters the gas cylinder from the one-way valve inlet, passes through 2 filters (10μm) to ensure its purity, and then passes through the internal flow channel. After two processes, the pressure is reduced to a stable value (according to customer needs). There is a threaded interface reserved for detecting the pressure in the gas cylinder on the product (2 SAE7 / 16 internal threads), and a pressure gauge or pressure sensor can be installed according to usage requirements.
[0045] 2. Use glass beads When the internal temperature reaches 110℃±5℃, the glass beads 5 will break, and the internal gas will squeeze the plunger 4 to the cap 6, and the gas will flow to the outside from the side breathing hole.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A combination valve for 35MPa locomotive, characterized by: It includes a shell, which includes an upper shell part and a lower shell part. The upper shell part is respectively provided with an outlet adapter and a manual stop valve, the upper shell part is provided with a secondary pressure reducing device, the lower shell part is provided with an overpressure relief valve, a primary pressure reducing device, an over-temperature relief device, a first plug and a one-way inflation valve, and the lower end of the lower shell part is a gas cylinder docking port.
2. A combination valve for 35MPa locomotives as claimed in claim 1, characterized in that: A plurality of cavities are formed on the upper part and the lower part of the shell.
3. A combination valve for 35MPa locomotives as claimed in claim 2, characterized in that: An over-temperature relief device is arranged in a cavity at the lower part of the shell, and the over-temperature relief device includes a plunger, a glass bead and a cap. The cap is connected to the port of the cavity, and a blind hole is opened inside the cap. The plunger is a columnar structure with two sections of different diameters, and the end with a smaller diameter fits tightly with the cavity, and the end with a larger diameter of the plunger has a blind hole inside. A glass bead is arranged between the blind hole of the cap and the blind hole of the plunger.
4. A combined valve for 35MPa locomotives as claimed in claim 2, characterized in that: A first-level pressure reducing device is arranged in a cavity at the lower part of the shell, and the first-level pressure reducing device includes a first-level plug, a first-level valve stem and a first-level spring. The first-level plug is connected to the end of the cavity, and a first-level valve stem is arranged in the cavity at the lower part of the shell below the first-level plug. A through hole is opened in the first-level valve stem, and the first-level valve stem has a head and a rod-shaped portion. The rod-shaped portion of the first-level valve stem is covered with a first-level spring.
5. A combined valve for 35MPa locomotives as claimed in claim 2, characterized in that: An overpressure relief valve is arranged in a cavity at the lower part of the shell, and the overpressure relief valve includes a relief valve core, a relief spring and a relief shell. The relief shell is connected to the cavity, a blind hole is opened inside the relief shell, and the relief valve core is installed in the blind hole. A blind hole is opened on the relief valve core, and the relief spring is installed between the blind hole of the relief valve core and the blind hole of the relief shell.
6. A combined valve for 35MPa locomotives as claimed in claim 2, characterized in that: A blind hole is opened on the top of the shell, and an ED plug is connected in the blind hole.
7. A combined valve for 35MPa locomotives as claimed in claim 2, characterized in that: A secondary pressure reducing device is arranged in a cavity in the upper part of the shell, and the secondary pressure reducing device comprises a secondary spring, a secondary end cover, a secondary valve seat and a secondary valve stem, wherein the secondary valve seat is in the cavity, the middle of the secondary valve seat is a hollow cylindrical part, the outer side of the cylindrical part is sleeved with a secondary spring, the cylindrical part is inserted with a secondary valve stem, the secondary valve stem has a head and a rod-shaped part, and the rod-shaped part is inserted into the cylindrical part of the secondary valve seat, the outer side of the secondary valve stem is sleeved with a secondary end cover, the secondary end cover is connected to the cavity, and the middle of the rod-shaped part of the secondary valve stem has a channel parallel and perpendicular to the axial direction, respectively, and the axial channel and the vertical channel are interconnected.
8. A combined valve for 35MPa locomotives as claimed in claim 2, characterized in that: A one-way inflation valve is arranged in a cavity at the lower part of the shell, and the one-way inflation valve comprises a one-way valve adapter, a spring nut, a one-way valve spring, a one-way valve core, a second filter, a jacket nut and a ball plug, wherein the spring nut is connected in the cavity, a through hole is opened in the middle of the spring nut, one end of which is connected to an end cover, a head of the one-way valve adapter, the head of the one-way valve adapter is connected to the cavity through a thread, the head of the one-way valve adapter is opened with a cavity, a columnar one-way valve core is arranged in the cavity, and a blind hole is opened on one side of the one-way valve core close to the end cover of the spring nut The one-way valve adapter has a hole, a one-way valve spring is arranged in the blind hole, the one-way valve adapter has a head, an outer convex part and an interface end, a cavity is opened in the interface end of the one-way valve adapter, a second filter is installed in the cavity, the outer part of the interface end of the one-way valve adapter is sleeved in the outer sleeve nut, a through hole is opened in the middle of the outer sleeve nut, a ball plug is sleeved in the through hole, one end of the ball plug is tightly fitted with the cavity opening of the interface end of the one-way valve adapter, one end of the ball plug extends out of the through hole of the outer sleeve nut, and the head of the ball plug is clamped between the outer sleeve nut and the interface end of the one-way valve adapter.
9. A combined valve for 35MPa locomotives as claimed in claim 1, characterized in that: A through hole is formed on the gas cylinder docking interface on the shell, and a first filter is installed at the port of the gas cylinder docking interface.
10. A combined valve for 35MPa locomotives as claimed in claim 2, characterized in that: A manual stop valve is arranged in a cavity at the upper part of the shell, and the manual stop valve comprises a stop valve nut, a stop valve stem, a stop moving bolt and a stop valve handle, wherein the stop valve nut extends into the cavity and is connected in the cavity, the stop valve stem is sleeved in the middle of the stop valve nut, the head of the stop valve stem is tightly fitted with the inner wall of the cavity, the end of the stop valve stem is sleeved with the stop valve handle, the end of the stop valve stem is provided with a through hole perpendicular to the axial direction, the through hole is provided with a stop moving bolt, and the stop moving bolt simultaneously passes through the side wall surface of the stop valve handle sleeved on the end of the stop valve stem.