External exhaust gas emission device, test system and installation method

Abstract

The invention relates to the technical field of exhaust emission, in particular to an external exhaust emission device, a test system and an installation method. A waste gas external connection discharging device comprises a discharging elbow pipe which is suitable for being arranged in a test workshop and comprises an air inlet elbow and a horizontal air outlet section, and the air inlet elbow is suitable for being connected with the exhaust end of a turbine pump; the discharge pipe is connected with the discharge elbow pipe in an inserted mode, the end, away from the discharge elbow pipe, of the discharge pipe is arranged outside the test workshop, part of the horizontal air outlet section is arranged on the periphery of the discharge pipe in a sleeving mode, or part of the discharge pipe is arranged on the periphery of the horizontal air outlet section in a sleeving mode, and a gap is reserved between the horizontal air outlet section and the discharge pipe; and the buffer layer is arranged in the gap. The invention provides an external exhaust gas emission device, a test system and an installation method, and aims to solve the problem that potential safety hazards exist due to resonance between a turbine pump and an emission pipeline caused by the fact that the end part of the emission pipeline is influenced by vibration of the turbine pump when a gas emission device is connected with a gas outlet to emit gas outdoors.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas emission, in particular to a waste gas external emission device, a test system and a mounting method. BACKGROUND

[0002] In the combined test of engine fuel combustor and turbine pump, the gas is discharged as waste gas through the turbine outlet after working by the turbine pump. Since the flow rate of the waste gas is low after being discharged through the turbine outlet, and the waste gas is hydrogen-rich fuel gas, the waste gas will expand and afterburn near the engine tail after being discharged, which makes the temperature in the test room high. After the test, it is found that the system pipeline and engine cable have obvious traces of overburning, which causes uncontrollable influence on the safety of the test system.

[0003] In view of this problem, in order to prevent the virtual fire from affecting the system equipment in the test room, a gas emission pipeline is designed and installed at the turbine gas outlet to lead the gas out of the test room.

[0004] During the entire test process, the test device needs to be placed in the test room for the safety of the test, and the waste gas needs to be discharged to the outside of the test room. Therefore, the gas emission device needs to be connected to the gas outlet for discharge to the outdoor, and the emission pipeline is relatively long. The end of the emission pipeline connected to the gas outlet end will be affected by the vibration of the turbine pump, which will cause the resonance of the turbine pump and the emission pipeline, and there is a safety hazard. SUMMARY

[0005] Therefore, the present application provides a waste gas external emission device, a test system and a mounting method to solve the problem that the test device needs to be placed in the test room for the safety of the test, the waste gas needs to be discharged to the outside of the test room, the gas emission device needs to be connected to the gas outlet for discharge to the outdoor, the emission pipeline is relatively long, the end of the emission pipeline connected to the gas outlet end will be affected by the vibration of the turbine pump, which will cause the resonance of the turbine pump and the emission pipeline, and there is a safety hazard.

[0006] In a first aspect, the present application provides a waste gas external emission device, comprising: A discharge elbow pipe is adapted to be arranged in the test room, the discharge elbow pipe comprises a gas inlet elbow and a horizontal gas outlet section, and the gas inlet elbow is adapted to be connected to the exhaust end of the turbine pump; A discharge pipe is insertedly arranged with the discharge elbow pipe, one end of the discharge pipe away from the discharge elbow pipe is arranged outside the test room, part of the horizontal gas outlet section is sleeved on the outer periphery of the discharge pipe, or part of the discharge pipe is sleeved on the outer periphery of the horizontal gas outlet section, and a gap is left between the horizontal gas outlet section and the discharge pipe; A buffer layer is arranged in the gap.

[0007] The buffer layer is sleeved on the outer periphery of the horizontal air outlet section, and the horizontal air outlet section with the sleeved buffer layer is inserted into the exhaust pipe. By arranging the buffer layer, the vibration received by the exhaust elbow pipe cannot be transmitted to the exhaust pipe, thereby avoiding the resonance problem of the exhaust elbow pipe and the exhaust pipe caused by hard connection (such as threaded connection, welded connection, etc.), and meeting the exhaust requirement of the exhaust gas. In this embodiment, the exhaust gas generated by the turbine pump enters the exhaust elbow pipe through the exhaust end, and the exhaust gas refers to hydrogen-rich fuel gas.

[0008] In an alternative embodiment, the horizontal air outlet section is horizontally arranged, and the exhaust pipe is a straight cylinder pipe, and the inner diameter of the exhaust pipe is greater than the outer diameter of the horizontal air outlet section.

[0009] In an alternative embodiment, the first leak-proof layer is sleeved on the outer periphery of the joint between the exhaust elbow pipe and the exhaust pipe, and the second leak-proof layer is sleeved on the outer periphery of the first leak-proof layer.

[0010] In an alternative embodiment, the buffer layer and the first leak-proof layer are alkali-free glass fiber cloth, and the second leak-proof layer is asbestos cloth.

[0011] In an alternative embodiment, the exhaust elbow is provided with a butt flange portion at the end portion away from the horizontal air outlet section, the butt flange portion is adapted to be connected with the exhaust end of the turbine pump, and the support throat pipe is provided to support the exhaust elbow pipe.

[0012] In an alternative embodiment, at least one protective gas blowing ring is sleeved on the outer periphery of the second leak-proof layer, the inner side wall of the protective gas blowing ring is provided with blowing holes, and the blowing holes are adapted to flow out the protective gas.

[0013] In an alternative embodiment, the inlet elbow and the horizontal air outlet section are fixedly connected, and the inner diameter of the inlet elbow is greater than or equal to the inner diameter of the horizontal air outlet section.

[0014] In a second aspect, the application further provides a test system comprising the exhaust gas external exhaust device.

[0015] In an alternative embodiment, the test system further comprises a support platform, a first support frame, a second support frame and a third support frame, the second support frame and the third support frame are arranged on the support platform, and the first support frame is adapted to be fixedly connected with the outer side wall of the test workshop.

[0016] In a third aspect, the application further provides a mounting method of the exhaust gas external exhaust device, the buffer layer is sleeved on the outer periphery of the horizontal air outlet section, and the horizontal air outlet section with the sleeved buffer layer is inserted into the exhaust pipe; or, the buffer layer is sleeved on the outer periphery of the exhaust pipe, and the exhaust pipe with the sleeved buffer layer is inserted into the horizontal air outlet section. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an external exhaust gas emission device according to an embodiment of the present invention; Figure 2 This is a schematic diagram showing the connection of the horizontal air outlet section, buffer layer, discharge pipe, first leak-proof layer, and second leak-proof layer of the discharge elbow pipe according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the welding transition section of the horizontal air outlet section in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Discharge elbow; 11. Inlet elbow; 1101. Connecting flange; 12. Horizontal outlet section; 13. Welded transition section; 14. Support throat; 2. Discharge pipe; 3. Support platform; 4. First support frame; 5. Buffer layer; 6. First leak-proof layer; 7. Second leak-proof layer; 8. Second support frame; 9. Third support frame. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0022] According to an embodiment of the present invention, in one aspect, an external exhaust gas emission device is provided, comprising: an exhaust elbow pipe 1, suitable for installation in a test workshop, the exhaust elbow pipe 1 including an inlet elbow 11 and a horizontal outlet section 12, the inlet elbow 11 being suitable for connection to the exhaust end of a turbopump; an exhaust pipe 2, inserted into the exhaust elbow pipe 1, one end of the exhaust pipe 2 facing away from the exhaust elbow pipe 1 being located outside the test workshop, and a portion of the horizontal outlet section 12 being sleeved on the outer periphery of the exhaust pipe 2; and a buffer layer 5, the buffer layer 5 being disposed within the gap.

[0023] After the buffer layer 5 is sleeved on the outer periphery of the horizontal air outlet section 12, the part of the horizontal air outlet section 12 sleeved with the buffer layer 5 is inserted into the discharge pipe 2. By arranging the buffer layer 5, the vibration received by the discharge elbow pipe 1 will not be transmitted to the discharge pipe 2, avoiding the resonance problem existing between the discharge elbow pipe 1 and the discharge pipe 2 due to the hard connection, and meeting the needs of the exhaust gas discharge. In the embodiment, the exhaust gas generated by the turbine pump enters into the discharge elbow pipe 1 through the exhaust end, and the exhaust gas refers to hydrogen-rich fuel gas, and the inlet elbow 11 is a 45° elbow.

[0024] In one embodiment, as shown in Figure 1 、 Figure 2 , the horizontal air outlet section 12 is horizontally arranged, and the discharge pipe 2 is a straight cylinder pipe. The inner diameter of the discharge pipe 2 is greater than the outer diameter of the horizontal air outlet section 12, so as to realize the connection between the discharge elbow pipe 1 and the discharge pipe 2, and make the horizontal air outlet section 12 enter into the discharge pipe 2.

[0025] In one embodiment, as shown in Figure 1 、 Figure 2 , the first anti-leakage layer 6 and the second anti-leakage layer 7 are further included. The first anti-leakage layer 6 is sleeved on the outer periphery of the joint between the discharge elbow pipe 1 and the discharge pipe 2, and the second anti-leakage layer 7 is sleeved on the outer periphery of the first anti-leakage layer 6. The first anti-leakage layer 6 plays a role of preventing the joint between the discharge elbow pipe 1 and the discharge pipe 2 from leaking, and the second anti-leakage layer 7 plays a further safety protection role.

[0026] In one embodiment, as shown in Figure 1 、 Figure 2 , the buffer layer 5 and the first anti-leakage layer 6 are alkali-free glass fiber cloth, and the second anti-leakage layer 7 is asbestos cloth. The alkali-free glass fiber cloth has good chemical stability, electrical insulation performance and strength, and plays a buffering role as the buffer layer 5 and a leakage prevention role as the first anti-leakage layer. The asbestos cloth has good heat insulation effect, and can realize the leakage prevention effect and the heat insulation effect. It should be noted that the buffer layer 5, the first anti-leakage layer 6 and the second anti-leakage layer 7 are not single-layer winding, but several layers (≥3 layers) of winding.

[0027] In one embodiment, as shown in Figure 1As shown, it also includes a support throat 14. The end of the intake elbow 11 facing away from the horizontal outlet section 12 is provided with a docking flange 1101, which is adapted to connect to the exhaust end of the turbopump. The support throat 14 provides support for the exhaust elbow 1. By providing the docking flange 1101, the exhaust end of the turbopump is connected to the docking flange 1101, allowing the exhaust gas generated by the turbopump to reach the docking flange 1101 and be discharged to the outdoor space via the exhaust elbow 1 and the exhaust pipe 2. The support throat 14 and the intake elbow 11 form a flat flange + groove sealing structure, tightened with 16 pieces of 35# steel M6, with flat washers and spring washers added at the nuts. The flat washers are pressed flat to ensure sealing.

[0028] In one embodiment, at least one protective gas purging ring is further included. The protective gas purging ring is sleeved on the outer periphery of the second leak-proof layer 7, and the inner sidewall of the protective gas purging ring is provided with a purging hole suitable for the outflow of protective gas. By setting the protective gas purging ring, when waste gas leaks from the connection between the discharge elbow pipe 1 and the discharge pipe 2, the protective gas dilutes the waste gas and prevents the waste gas from reigniting. Specifically, the protective gas is nitrogen. In this embodiment, the inner diameter of the protective gas purging ring is approximately 200-220 mm larger than the outer diameter of the fitting joint. The drilling method is proposed to adopt an alternating horizontal outward, oblique downward, and inward drilling method, with a hole diameter of Φ2. The protective gas purging ring is reliably fixed by a separate bracket to ensure that the purging ring does not shift or fall off during the purging process.

[0029] In one embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the intake elbow 11 and the horizontal exhaust section 12 are fixedly connected, and the inner diameter of the intake elbow 11 is equal to the inner diameter of the horizontal exhaust section 12. In this embodiment, the intake elbow 11 and the horizontal exhaust section 12 are welded together, and the inner diameter of the intake elbow 11 is equal to the inner diameter of the horizontal exhaust section 12. It should be noted that a welding transition section 13 is left at the end where the horizontal exhaust section 12 is welded to the intake elbow 11. The welding transition section 13 is formed by welding with welding wire, and the outer diameter of the welding transition section 13 gradually decreases in the direction away from the intake elbow 11. This setting ensures that the thickness of the welding transition section 13 near the intake elbow 11 remains unchanged to improve the vibration resistance of the weld heat-affected zone, while the gradual thinning of the welding transition section 13 reduces the impact of stress concentration.

[0030] According to an embodiment of the present invention, another aspect provides a test system including the above-described external exhaust gas emission device.

[0031] In one embodiment, such as Figure 1As shown, it also comprises a support platform 3, a first support frame 4, a second support frame 8 and a third support frame 9, the second support frame 8 and the third support frame 9 are arranged on the support platform 3, and the first support frame 4 is adapted to be fixedly connected with the outer side wall of the test workshop. In this embodiment, the exhaust pipe 2 is fixedly connected with the first support frame 4, the second support frame 8 and the third support frame 9 respectively, and the support platform 3 is located in the test workshop, the second support frame 8 and the third support frame 9 provide support for the exhaust pipe 2 in the test workshop, and the first support frame 4 provides support for the exhaust pipe 2 outside the test workshop.

[0032] A mounting method of the exhaust gas external exhaust device, comprising the following steps: (1) the flange part 1101 is connected with the flange of the exhaust end of the turbine pump by butt joint, and the installation torque is controlled, preferably the torque is 10 N·m; (2) a plurality of layers (preferably 20 layers) of alkali-free glass fiber cloth are wound on the horizontal air outlet section 12 to form a buffer layer 5, and the horizontal air outlet section 12 and the exhaust pipe 2 are butt jointed, so that the horizontal air outlet section 12 with the buffer layer 5 can enter the exhaust pipe 2, and the insertion depth is 3-20 cm (preferably 6 cm); (3) after the butt joint is completed, the outer periphery of the joint part of the exhaust elbow pipe 1 and the exhaust pipe 2 is wound to form a first anti-leakage layer and a second anti-leakage layer, and after the second anti-leakage layer is wound, three annular clamps are used for fixing; (4) the first support frame 4, the second support frame 8 and the third support frame 9 are arranged, and the exhaust test is carried out.

[0033] The exhaust gas external exhaust device provided by the application has the following advantages: (1) by arranging the buffer layer 5, the vibration of the exhaust elbow pipe 1 cannot be transmitted to the exhaust pipe 2, the resonance problem existing in the hard connection (such as threaded connection, welded connection, etc.) of the exhaust elbow pipe 1 and the exhaust pipe 2 is avoided, and the exhaust gas emission requirement is met; (2) the welding transition section 13 is formed after the welding of the welding wire, and the outer diameter of the welding transition section 13 towards the direction away from the air inlet elbow 11 gradually decreases, so that the thickness of the welding transition section 13 close to the air inlet elbow 11 remains unchanged to improve the vibration resistance of the welding heat affected zone, and the influence of stress concentration is reduced due to the gradual thinning of the thickness of the welding transition section 13; (3) the support platform 3 is located in the test workshop, the second support frame 8 and the third support frame 9 provide support for the exhaust pipe 2 in the test workshop, and the first support frame 4 provides support for the exhaust pipe 2 outside the test workshop.

[0034] As an alternative embodiment, the air inlet elbow 11 and the horizontal air outlet section 12 can also be fixedly connected by threads or the like, and the inner diameter of the air inlet elbow 11 is greater than the inner diameter of the horizontal air outlet section 12.

[0035] As an alternative implementation, the partial exhaust pipe 2 is sleeved on the outer periphery of the horizontal air outlet section 12, and a gap is left between the horizontal air outlet section 12 and the exhaust pipe 2. After the buffer layer 5 is sleeved on the outer periphery of the exhaust pipe 2, the exhaust pipe portion sleeved with the buffer layer 5 is inserted into the horizontal air outlet section 12.

[0036] As an alternative implementation, the protective gas blowing ring is not only arranged at the joint between the exhaust elbow pipe 1 and the exhaust pipe 2, but also arranged at the joint between the exhaust end of the turbo pump and the air inlet elbow 11.

[0037] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. An external exhaust gas emission device, characterized in that, include: The discharge elbow (1) is suitable for installation in the test workshop. The discharge elbow (1) includes an intake elbow (11) and a horizontal outlet section (12). The intake elbow (11) is suitable for connection to the exhaust end of the turbopump. The discharge pipe (2) is inserted into the discharge elbow pipe (1). One end of the discharge pipe (2) away from the discharge elbow pipe (1) is located outside the test workshop. Part of the horizontal air outlet section (12) is sleeved on the outer periphery of the discharge pipe (2), or part of the discharge pipe (2) is sleeved on the outer periphery of the horizontal air outlet section (12). A gap is left between the horizontal air outlet section (12) and the discharge pipe (2). A buffer layer (5) is disposed within the gap.

2. The external exhaust gas emission device according to claim 1, characterized in that, The horizontal air outlet section (12) is horizontally arranged, and the discharge pipe (2) is a straight pipe with an inner diameter greater than the outer diameter of the horizontal air outlet section (12).

3. The external exhaust gas emission device according to claim 2, characterized in that, It also includes a first leak-proof layer (6) and a second leak-proof layer (7), wherein the first leak-proof layer (6) is sleeved on the outer periphery of the insertion point of the discharge elbow (1) and the discharge pipe (2), and the second leak-proof layer (7) is sleeved on the outer periphery of the first leak-proof layer (6).

4. The external exhaust gas emission device according to claim 3, characterized in that, The buffer layer (5) and the first leak-proof layer (6) are alkali-free glass fiber cloth, and the second leak-proof layer (7) is asbestos cloth.

5. The external exhaust gas emission device according to claim 4, characterized in that, It also includes a support throat (14), and the end of the intake elbow (11) away from the horizontal exhaust section (12) is provided with a docking flange (1101), which is adapted to be connected to the exhaust end of the turbo pump, and the support throat (14) provides support for the exhaust elbow (1).

6. The external exhaust gas emission device according to claim 5, characterized in that, It also includes at least one protective gas purging ring, which is sleeved on the outer periphery of the second leak-proof layer (7). The inner sidewall of the protective gas purging ring is provided with a purging hole, which is adapted to allow protective gas to flow out.

7. The external exhaust gas emission device according to claim 6, characterized in that, The intake elbow (11) and the horizontal outlet section (12) are fixedly connected, and the inner diameter of the intake elbow (11) is greater than or equal to the inner diameter of the horizontal outlet section (12).

8. A testing system, characterized in that, Includes the external exhaust gas emission device as described in any one of claims 1-7.

9. The testing system according to claim 8, characterized in that, It also includes a support platform (3), a first support frame (4), a second support frame (8) and a third support frame (9), wherein the support platform (3) is provided with the second support frame (8) and the third support frame (9), and the first support frame (4) is adapted to be fixedly connected to the outer wall of the test workshop.

10. A method for installing an external exhaust gas emission device, used with the external exhaust gas emission device according to claim 1, characterized in that, After the buffer layer (5) is fitted around the outer periphery of the horizontal air outlet section (12), the portion of the horizontal air outlet section (12) fitted with the buffer layer (5) is inserted into the discharge pipe (2); or, after the buffer layer (5) is fitted around the outer periphery of the discharge pipe (2), the portion of the exhaust pipe fitted with the buffer layer (5) is inserted into the horizontal air outlet section (12).

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