A high-pressure needle valve and a filtering and draining method

Abstract

The present invention relates to the technical field of clean energy equipment, and specifically to a high-pressure needle valve and a filtering and draining method, comprising a valve body, wherein the valve body is provided with an air inlet, an exhaust port and a drain port, wherein a first regulating mechanism is provided at the air inlet, and a second regulating mechanism is provided at the drain port; the air inlet and the exhaust port are connected through a first channel, and a filter element is provided in the first channel; the drain port is connected to the first channel through a second channel, and the connecting position of the second channel and the first channel is provided upstream of the filter element. The purpose is to provide a filter element inside the valve body, and filter the high-pressure hydrogen through the filtration of the filter element; the seal, filter element and valve core of the present invention can be replaced directly by screwing and pulling out, which is convenient for directly replacing accessories, making later maintenance easier and more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of clean energy equipment, and in particular relates to a high-pressure needle valve and a filtering and sewage discharge method. Background Art

[0002] In the new energy industry, hydrogen refueling is achieved through high-pressure hydrogenation equipment, which requires high-purity hydrogen. In order to ensure the purity of the hydrogen, the usual practice is to equip the pipeline system of the high-pressure hydrogenation equipment with high-precision filters, high-pressure regulating valves and pipeline accessories to ensure that the refueled hydrogen is filtered.

[0003] However, by equipping the piping system with a high-precision filter, the number of piping accessories in the system will be large and the cost will be high, the system piping will be redundant, and the purpose of optimizing the piping layout and reducing costs cannot be achieved. Summary of the invention

[0004] In order to optimize the pipeline layout, the present invention provides a high-pressure needle valve and a filtering and draining method. The high-pressure needle valve has a compact structure, and a filter element is arranged inside the valve body. The purpose of filtering the high-pressure hydrogen is achieved by filtering the filter element. The seal, filter element and valve core of the present invention can be replaced directly by screwing and pulling them out, which is convenient for directly replacing accessories and makes later maintenance easier and more convenient.

[0005] The technical solution adopted by the present invention is: a high-pressure needle valve, including a valve body, on which an air inlet, an exhaust port and a sewage outlet are arranged, a first regulating mechanism is arranged at the air inlet, and a second regulating mechanism is arranged at the sewage outlet; the air inlet and the exhaust port are connected through a first channel, and a filter element is arranged in the first channel; the sewage outlet is connected with the first channel through a second channel, and the connecting position of the second channel and the first channel is arranged upstream of the filter element.

[0006] Preferably, the first regulating mechanism comprises an intake valve core and an intake valve stem screw sleeve, the intake valve core is connected to the intake valve stem screw sleeve, and the intake valve stem screw sleeve is detachably connected to the valve body; the amount of intake air at the air inlet is regulated by the intake valve core.

[0007] Preferably, the second regulating mechanism comprises an exhaust valve core and an exhaust valve stem sleeve, the exhaust valve core is connected to the exhaust valve stem sleeve, and the exhaust valve stem sleeve is detachably connected to the valve body; the amount of sewage discharged at the sewage outlet is adjusted by the exhaust valve core.

[0008] Preferably, the filter element is connected to a sealing ring, the sealing ring is detachably connected to the valve body, and the sealing ring can be detached from the valve body with the filter element.

[0009] Preferably, the exhaust port is set to two, namely the first exhaust port and the second exhaust port; the sealing ring is respectively provided with an inlet, a first outlet and a second outlet, the inlet is respectively connected with the first outlet and the second outlet, the inlet is connected with the first channel through a filter element, the first outlet is connected with the first exhaust port, and the second outlet is connected with the second exhaust port.

[0010] Preferably, the inner diameter of the first channel is changed from the air inlet to the exhaust port, the sealing ring is arranged in a section with a larger diameter in the first channel, the diameter of the sealing ring is equivalent to the diameter of the section with a larger diameter in the first channel, a conical sealing ring is arranged on the sealing ring, and the conical sealing ring is arranged on the side close to the air inlet.

[0011] Preferably, the sealing ring is connected to the upper end clamping nut, and the upper end clamping nut is detachably connected to the valve body; the first outlet corresponds to the first exhaust port, and the inner diameter of the first outlet is equivalent to the inner diameter of the first exhaust port; the second outlet corresponds to the second exhaust port, and the inner diameter of the second outlet is equivalent to the inner diameter of the second exhaust port.

[0012] Preferably, the diameter of the air inlet is larger than the diameter of the sewage outlet.

[0013] A method for filtering and draining waste using a high-pressure needle valve, comprising the following steps:

[0014] S1: Install the high-pressure needle valve on the fluid pipeline, and connect the air inlet pipe to the air inlet of the high-pressure needle valve, the exhaust pipe to the exhaust port of the high-pressure needle valve, and the drain pipe to the drain port of the high-pressure needle valve;

[0015] S2: When filtering the fluid, the air inlet is opened and the drain outlet is closed, so that the high-pressure fluid flows from the air inlet into the first channel; the high-pressure fluid is pressed from the outside of the filter element to the inside of the filter element, or from the inside of the filter element to the outside of the filter element, and then discharged from the exhaust port after filtering;

[0016] S3: When reverse blowing, close the air inlet, open the drain port, and rely on the pressure in the high-pressure needle valve to press the fluid from the inside of the filter element to the outside of the filter element, or from the outside of the filter element to the inside of the filter element. After reverse blowing, the impurities attached to the filter element are discharged from the drain port.

[0017] Preferably, in step S2, during the process of the fluid being discharged from the exhaust port after being filtered, the amount of gas discharged from the exhaust port can be adjusted by adjusting the exhaust adjustment mechanism in the high-pressure needle valve.

[0018] The present invention is beneficial in that:

[0019] 1) The present invention sets a filter element inside the valve body, through which high-pressure hydrogen can be filtered to ensure the purity of hydrogen. By setting the filter element inside the valve body, the pipeline design can be reduced, and the overall appearance of the valve body is compact and small, which is easy to install; the air intake valve of the present invention controls the air intake and automatically realizes two-channel diversion through the filter. After closing the air intake valve, the drain valve is opened, and the system gas pressure is used for back-flushing to realize channel cleaning; the present invention is easy to maintain. If the seal, filter element or valve core is replaced, there is no need to disassemble the entire valve body, and the corresponding nut and sleeve can be directly disassembled as needed to replace the accessories;

[0020] 2) The high-pressure needle valve of the present invention is provided with an air inlet and two exhaust ports, which can realize the function of a three-way pipeline. At the same time, when sewage is not discharged, the high-pressure needle valve of the present invention can be used as a control valve on the pipeline system to control the air intake and exhaust. The present invention integrates the filter, tee and valve required to be set on the traditional pipeline into one. Through the high-pressure needle valve of the present invention, a high-pressure valve and a high-pressure tee can be saved when the system pipeline is installed, thereby reducing the pipeline design. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a partial enlarged view of the present invention;

[0023] Figure 3 The three-dimensional Figure 1 ;

[0024] Figure 4 The three-dimensional Figure 2 .

[0025] In the figure: 1-valve body; 2-sealing ring; 3-upper end tightening nut; 4-inlet valve core; 5-inlet gasket; 6-inlet valve stem pressure ring; 7-inlet valve stem; 8-inlet valve stem screw sleeve; 9-inlet regulating valve handle; 10-exhaust valve core; 11-exhaust gasket; 12-exhaust valve stem pressure ring; 13-exhaust valve stem; 14-exhaust valve stem screw sleeve; 15-filter element; 16-sealing ring; 17-inlet valve stem sealing ring; 18-exhaust valve stem sealing ring; 19-conical sealing ring; 20-sealing retaining ring; 21-inlet port; 22-first exhaust port; 23-second exhaust port; 24-drain port; 25-exhaust regulating valve handle; 26-inlet; 27-first outlet; 28-second outlet. DETAILED DESCRIPTION

[0026] 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 embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] like Figure 1-4 As shown, a high-pressure needle valve is used in a hydrogenation pipeline, and specifically includes a valve body 1, on which an air inlet 21, an air outlet and a sewage outlet 24 are provided. The air inlet 21 is connected to the air inlet pipe of the high-pressure hydrogen. The high-pressure hydrogen enters the interior of the valve body 1 through the air inlet 21, and is discharged from the exhaust port for refueling.

[0028] A first regulating mechanism is provided at the air inlet 21, by which the amount of air intake in the air inlet 21 can be adjusted, and the air inlet 21 can also be closed by the first regulating mechanism. A second regulating mechanism is provided at the sewage outlet 24, by which the amount of sewage discharge in the sewage outlet 24 can be adjusted, and when the sewage outlet 24 is not needed to work, the sewage outlet 24 can also be closed by the second regulating mechanism.

[0029] The air inlet 21 is connected with the exhaust port through a first channel, and a filter element 15 is arranged in the first channel. After the high-pressure hydrogen enters from the air inlet 21, it enters into the first channel, is filtered by the filter element 15 in the first channel, and is discharged from the exhaust port, thereby achieving the purpose of filtering the high-pressure hydrogen; the sewage outlet 24 is connected with the first channel through a second channel, and the connecting position between the second channel and the first channel is arranged at the upstream of the filter element 15. In the gas-filling state, the sewage outlet 24 is in a closed state; when back-purge and sewage discharge are required, the sewage outlet 24 is opened and the air inlet 21 is closed. At this time, the high-pressure gas in the valve body 1 is discharged from the sewage outlet 24 through the filter element 15 due to its own system pressure, thereby achieving the purpose of back-purge of the filter element 15.

[0030] The first regulating mechanism comprises an intake valve core 4 and an intake valve stem screw sleeve 8, wherein the intake valve core 4 is connected to the intake valve stem screw sleeve 8, and the intake valve stem screw sleeve 8 is detachably connected to the valve body 1; the amount of intake air at the intake port 21 is regulated by the intake valve core 4. The intake valve core 4 is connected to the intake valve stem 7, and the diameters of the intake valve core 4 and the intake valve stem 7 are equivalent. The intake valve stem screw sleeve 8 is sleeved on the outside of the intake valve stem 7 and connected to the intake valve stem screw sleeve 8. The circumference of the intake valve stem screw sleeve 8 is provided with an external thread, which matches the internal thread on the valve body 1. The position of the intake valve core 4 is regulated by the threaded connection between the intake valve stem screw sleeve 8 and the valve body 1. An intake gasket 5 is also sleeved on the outside of the intake valve core 4, and an intake valve stem pressure ring 6 is arranged between the intake gasket 5 and the intake valve stem screw sleeve 8. The cross-section of the intake valve stem pressure ring 6 is T-shaped. The large end face of the intake valve stem pressure ring 6 is in contact with the intake valve stem screw sleeve 8, and the small end face of the intake valve stem screw sleeve 8 is in contact with the intake gasket 5, thereby ensuring the sealing effect.

[0031] The second regulating mechanism comprises an exhaust valve core 10 and an exhaust valve stem screw sleeve 14, wherein the exhaust valve core 10 is connected to the exhaust valve stem screw sleeve 14, and the exhaust valve stem screw sleeve 14 is detachably connected to the valve body 1; the amount of sewage discharged at the sewage outlet 24 is regulated by the exhaust valve core 10. The second regulating mechanism is configured in the same manner as the first regulating mechanism, wherein the exhaust valve core 10 is connected to the exhaust valve stem 13, and the exhaust valve stem screw sleeve 14 is sleeved and connected to the outside of the exhaust valve stem 13, and the external thread of the exhaust valve stem screw sleeve 14 matches the valve body 1 and is threadedly connected to the valve body 1; an exhaust gasket 11 is disposed on the outer surface of the exhaust valve core 10, and an exhaust valve stem pressure ring 12 is disposed between the exhaust gasket 11 and the exhaust valve stem screw sleeve 14, and the structure of the exhaust valve stem pressure ring 12 is the same as that of the intake valve stem pressure ring 6, thereby ensuring the sealing of the sewage outlet 24.

[0032] The filter element 15 is connected to the sealing ring 2, and the sealing ring 2 is detachably connected to the valve body 1. In this embodiment, the sealing ring 2 and the filter element 15 are connected together by threads. After the sealing ring 2 and the filter element 15 are directly inserted into the valve body 1, an upper end clamping nut 3 is arranged above the sealing ring 2 to ensure that the sealing ring 2 is clamped so that the sealing ring 2 will not fall out. The upper end clamping nut 3 and the sealing ring 2 can be separately arranged or connected or arranged as one body.

[0033] When the upper clamping nut 3 is connected to the sealing ring 2, it can be connected by threading. At this time, the upper clamping nut 3 can be used as the exhaust adjustment mechanism of the valve body 1, that is, the upper clamping nut 3 is detachably connected to the valve body 1, and the upper clamping nut 3 is connected to the valve body 1 by threading. By screwing the upper clamping nut 3, the upper clamping nut 3 together with the sealing ring 2 and the filter element 15 can be pulled out; the first outlet 27 on the sealing ring 2 corresponds to the first exhaust port 22, and the inner diameter of the first outlet 27 is equivalent to the inner diameter of the first exhaust port 22; the second outlet 28 corresponds to the second exhaust port 23, and the inner diameter of the second outlet 28 is equivalent to the inner diameter of the second exhaust port 23. When exhaust adjustment is required, only the upper clamping nut 3 needs to be screwed to make the upper clamping nut 3 move up and down ( Figure 1 The sealing ring 2 is driven to move up and down, so that the first outlet 27 and the second outlet 28 on the sealing ring 2 are completely corresponding to or partially misaligned with the first exhaust port 22 and the second exhaust port 23, thereby achieving the effect of fine-tuning the exhaust volume at the exhaust port.

[0034] A sealing ring 16 is sleeved on the outer wall of the upper end clamping nut 3, and a sealing retaining ring 20 is arranged on the sealing ring 16, so as to ensure the sealing at the outer peripheral surface of the upper end clamping nut 3, so that the high-pressure hydrogen will not leak out; the sealing ring 2 can be detached from the valve body 1 with the filter element 15. When disassembling, it is only necessary to remove the upper end clamping nut 3 first, and then take out the sealing ring 2, and the sealing ring 2 and the filter element 15 connected to the sealing ring 2 can be taken out from the valve body 1 together, and the filter element 15 can be replaced.

[0035] The exhaust port is provided with two, namely, the first exhaust port 22 and the second exhaust port 23; the sealing ring 2 is provided with an inlet 26, a first outlet 27 and a second outlet 28, respectively. The inlet 26 is communicated with the first outlet 27 and the second outlet 28, respectively. The inlet 26 is communicated with the first outlet 27 and the second outlet 28, respectively. The inlet 26 is communicated with the first channel through the filter element 15, the first outlet 27 is communicated with the first exhaust port 22, and the second outlet 28 is communicated with the second exhaust port 23. It can be understood that after being filtered by the filter element 15, the high-pressure hydrogen enters the sealing ring 2, and enters the first outlet 27 and the second outlet 28 through the inlet 26 in the sealing ring 2, and finally is discharged from the valve body 1 from the first exhaust port 22 and the second exhaust port 23. The first outlet 27 and the second outlet 28 are provided on the circumferential surface of the sealing ring 2, and when the sealing ring 2 is taken out, it is taken out from the upper side of the valve body 1 (that is, the taking-out direction of the sealing ring 2 is perpendicular to the first outlet 27 and the second outlet 28).

[0036] The inner diameter of the first channel is set to change from the air inlet 21 to the exhaust port, the sealing ring 2 is set in a section with a larger diameter in the first channel, and the diameter of the sealing ring 2 is equivalent to the diameter of the section with a larger diameter in the first channel. The sealing ring 2 is provided with a conical sealing ring 19, and the conical sealing ring 19 is set on the side close to the air inlet 21. The sealing ring 2 is provided with a conical sealing ring 19, and the inside of the first channel can be sealed by the conical sealing ring 19, so that the high-pressure hydrogen flows out from the filter element 15 (after entering from the outside of the filter element 15 to the inside, and then flows out from the first outlet 27 and the second outlet 28 on the sealing ring 2) after being filtered, and will not leak from the outer wall of the sealing ring 2 and the outer wall of the upper end compression nut 3.

[0037] The diameter of the air inlet 21 is larger than that of the sewage outlet 24. The larger diameter of the air inlet 21 ensures the air intake. Since sewage is only discharged from the residual gas inside the valve body 1, the diameter of the sewage outlet 24 can be relatively small.

[0038] A method for filtering and draining waste from a high-pressure needle valve is described by taking high-pressure hydrogen as an example, and includes the following steps:

[0039] S1: Install the high-pressure needle valve on the fluid pipeline, and connect the air inlet pipe to the air inlet port 21 on the high-pressure needle valve, the exhaust pipe to the exhaust port on the high-pressure needle valve, and the sewage pipe to the sewage outlet 24 on the high-pressure needle valve;

[0040] S2: When filtering the fluid, the air inlet 21 is opened and the drain outlet 24 is closed, that is, the exhaust regulating valve handle 25 is screwed to make the exhaust valve core 10 turn to the Figure 1 The air inlet 21 is opened, that is, the air inlet regulating valve handle 9 is screwed to move the air inlet valve core 4 to the right, so that the high-pressure fluid flows from the air inlet 21 into the first channel and into the filter element 15; the high pressure of the gas itself is pressed from the outside of the filter element 15 to the inside of the filter element 15, or from the inside of the filter element 15 to the outside of the filter element 15 by the high pressure, and filtered. The filtered high-pressure hydrogen flows into the inlet 26 of the sealing ring 2, and flows from the first outlet 27 and the second outlet 28 in the sealing ring 2 to the first exhaust port 22 and the second exhaust port 23 respectively, and finally enters the exhaust pipe.

[0041] S3: During reverse blowing, the air inlet 21 is closed and the drain port 24 is opened. Relying on the pressure inside the high-pressure needle valve, since the valve body 1 contains high-pressure hydrogen, the fluid is pressed from the inside of the filter element 15 to the outside of the filter element 15, or from the outside of the filter element 15 to the inside of the filter element 15. After reverse blowing of impurities attached to the filter element 15, the internal flow channel of the valve body 1 and the filter element 15 are cleaned and drained, and finally discharged from the drain port 24.

[0042] In step S2, during the process of the fluid being discharged from the exhaust port after being filtered, the amount of gas discharged from the exhaust port can be adjusted by adjusting the exhaust adjustment mechanism in the high-pressure needle valve. The exhaust adjustment mechanism is the upper clamping nut 3 and the sealing ring 2 mentioned above. By screwing the upper clamping nut 3, the upper clamping nut 3 moves up and down, driving the sealing ring 2 to move up and down, so that the first outlet 27 and the second outlet 28 on the sealing ring 2 are completely corresponding to or partially misaligned with the first exhaust port 22 and the second exhaust port 23, thereby achieving the effect of fine-tuning the exhaust volume at the exhaust port.

[0043] The above embodiments are preferred embodiments. It should be noted that the above preferred embodiments should not be regarded as limiting the invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-pressure needle valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with an air inlet (21), an air outlet and a sewage outlet (24); the air inlet (21) is provided with a first regulating mechanism, and the sewage outlet (24) is provided with a second regulating mechanism; the air inlet (21) is connected to the exhaust port via a first channel, and a filter element (15) is provided in the first channel; the sewage outlet (24) is connected to the first channel via a second channel, and the communication position between the second channel and the first channel is provided upstream of the filter element (15); The first regulating mechanism comprises an intake valve core (4) and an intake valve stem screw sleeve (8), the intake valve core (4) being connected to the intake valve stem screw sleeve (8), and the intake valve stem screw sleeve (8) being detachably connected to the valve body (1); the amount of intake air at the intake port (21) is regulated by the intake valve core (4); The second regulating mechanism comprises an exhaust valve core (10) and an exhaust valve stem screw sleeve (14), the exhaust valve core (10) being connected to the exhaust valve stem screw sleeve (14), and the exhaust valve stem screw sleeve (14) being detachably connected to the valve body (1); the amount of sewage discharged at the sewage outlet (24) is regulated by the exhaust valve core (10); An external thread is arranged on the circumferential surface of the intake valve stem screw sleeve, and an external thread is arranged on the outside of the exhaust valve stem screw sleeve.

2. The high pressure needle valve according to claim 1, characterized in that: The filter element (15) is connected to the sealing ring (2), the sealing ring (2) is detachably connected to the valve body (1), and the sealing ring (2) can be detached from the valve body (1) with the filter element (15).

3. The high pressure needle valve according to claim 2, characterized in that: The exhaust ports are provided in two forms, namely a first exhaust port (22) and a second exhaust port (23); the sealing ring (2) is provided with an inlet (26), a first outlet (27) and a second outlet (28), respectively; the inlet (26) is communicated with the first outlet (27) and the second outlet (28), respectively; the inlet (26) is communicated with the first channel via a filter element (15); the first outlet (27) is communicated with the first exhaust port (22); and the second outlet (28) is communicated with the second exhaust port (23).

4. The high pressure needle valve according to claim 3, characterized in that: The inner diameter of the first channel is arranged to change from the air inlet (21) to the air outlet, the sealing ring (2) is arranged in a section with a larger diameter in the first channel, the diameter of the sealing ring (2) is equivalent to the diameter of the section with a larger diameter in the first channel, and a conical sealing ring (19) is arranged on the sealing ring (2), and the conical sealing ring (19) is arranged on a side close to the air inlet (21).

5. The high pressure needle valve according to claim 3 or 4, characterized in that: The sealing ring (2) is connected to the upper end clamping nut (3), and the upper end clamping nut (3) is detachably connected to the valve body (1); the first outlet (27) corresponds to the first exhaust port (22), and the inner diameter of the first outlet (27) is equivalent to the inner diameter of the first exhaust port (22); the second outlet (28) corresponds to the second exhaust port (23), and the inner diameter of the second outlet (28) is equivalent to the inner diameter of the second exhaust port (23).

6. The high pressure needle valve according to claim 5, characterized in that: The diameter of the air inlet (21) is greater than the diameter of the sewage outlet (24).

7. A method for filtering and draining waste using a high-pressure needle valve, using the high-pressure needle valve described in claim 1, characterized in that: The following steps are involved: S1: Install the high-pressure needle valve on the fluid pipeline, and connect the air inlet pipe to the air inlet port (21) on the high-pressure needle valve, the exhaust pipe to the exhaust port on the high-pressure needle valve, and the sewage pipe to the sewage outlet (24) on the high-pressure needle valve; S2: When filtering the fluid, the air inlet (21) is opened and the drain outlet (24) is closed, so that the high-pressure fluid flows from the air inlet (21) into the first channel; the high-pressure fluid is pressed from the outside of the filter element (15) to the inside of the filter element (15), or from the inside of the filter element (15) to the outside of the filter element (15), and then discharged from the exhaust port after filtering; S3: During reverse purge, the air inlet (21) is closed, the drain outlet (24) is opened, and the fluid is pressed from the inside of the filter element (15) to the outside of the filter element (15), or from the outside of the filter element (15) to the inside of the filter element (15) by relying on the pressure in the high-pressure needle valve, so that impurities attached to the filter element (15) are reversely purged and then discharged from the drain outlet (24).

8. The filtering and draining method of a high-pressure needle valve according to claim 7, characterized in that: In step S2, during the process of the fluid being discharged from the exhaust port after being filtered, the amount of gas discharged from the exhaust port can be adjusted by adjusting the exhaust adjustment mechanism in the high-pressure needle valve.

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