Catalyst ventilation experiment device
By setting up the specimen mounting holes and specimen limit structures on the specimen mounting parts of the catalyst breathable experimental device, and using the combination of sealing parts and pressing parts, the problems of catalyst specimen disassembly and assembly and gas leakage are solved, and high-precision breathable experiments are achieved.
Patent Information
- Application Number
- CN202421235164.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing catalyst breathable experimental equipment has difficulties in disassembly and assembly and gas leakage, resulting in inaccurate testing.
A catalyst breathable experimental device is designed. By setting a test piece mounting hole and a test piece limit structure on the test piece mounting member, the disassembly and assembly of the catalyst sample is facilitated, and the combination of the sealing member and the pressing member can avoid gas leakage.
The rapid disassembly and assembly of catalyst test pieces and high-precision breathable experiments are realized, which avoids gas leakage and improves the reliability of the test.
Smart Images
Figure CN222866483U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of catalyst performance testing, and specifically relates to a catalyst air permeability experimental device. Background Art
[0002] Space monopropellant engines are widely used in my country's space stations, manned spacecraft, spacecraft orbits, attitude control and other fields. Among them, the catalyst decomposes the liquid propellant to burn and produce the propellant gas, which is the entire power source of the engine. Therefore, the catalytic decomposition performance of the catalyst for liquid propellant is a key factor in determining the engine's propulsion performance and stability.
[0003] At present, the mainstream catalysts used in monopropellant engines are mainly granular catalysts, which are prepared by bonding catalyst powders loaded with active ingredients and then extruding them into granular shapes. After filling, the inside of the granular bed is composed of these small granular catalysts tightly stacked, and the gaps between the particles constitute the flow channel of the propellant. Therefore, the channels inside the granular bed are complex and tortuous, and the laminar flow resistance is large, making it difficult for the propellant to flow. Affected by extreme operating conditions, the particles often suffer from severe wear and even breakage, which leads to the formation of holes inside the catalytic bed and overflow of the propeller; broken particles will block the nozzle after entering the throat of the engine, causing the chamber pressure to exceed the rated value, seriously affecting the safety of the aircraft.
[0004] In addition, there are more and more new designs for catalysts, so there is an increasing demand to test the performance of newly designed catalysts. Permeability performance experiments are of great significance for understanding the physical and chemical properties of catalysts, optimizing catalytic reaction conditions, and improving the efficiency and sustainability of industrial production processes. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a catalyst permeability experimental device which has a simple and reliable structure, is convenient and quick to disassemble and assemble catalyst test pieces, and can perform accurate testing.
[0006] The utility model provides a catalyst permeability experimental device, comprising a main body and a test piece mounting piece;
[0007] A cavity is provided in the main body, and an opening and an air inlet are provided on the cavity;
[0008] The specimen mounting part includes a sealing part and a pressing part. The sealing part can detachably seal the opening. The sealing part is provided with a specimen mounting hole. One end of the specimen mounting hole is connected to the cavity, and the other end is provided with a specimen limiting structure and an air outlet. The catalyst specimen to be subjected to the air permeability test is installed in the specimen mounting hole and abuts against the specimen limiting structure through the pressing part.
[0009] Furthermore, the specimen limiting structure is an annular plate arranged at the end of the specimen mounting hole, the outer ring of the annular plate is connected to the inner wall of the specimen mounting hole, and the inner ring of the annular plate forms the air outlet;
[0010] The cross-sectional dimension of the catalyst test piece is larger than the inner circle dimension of the annular plate.
[0011] Furthermore, the catalyst permeability experimental device also includes an annular fitting, the outer wall of which is fitted with the inner wall of the specimen installation hole, and the inner wall of which is fitted with the outer wall of the catalyst specimen.
[0012] Furthermore, a sealing ring II is provided between the catalyst specimen and the specimen limiting structure.
[0013] Furthermore, the pressing member includes an annular abutment member;
[0014] The annular abutment piece is detachably arranged in the test piece installation hole, the inner ring size of the annular abutment piece is smaller than the cross-sectional size of the catalyst test piece, and the end of the annular abutment piece abuts against the catalyst test piece;
[0015] One end of the inner ring of the annular abutment member is connected to the end of the catalyst test piece, and the other end is connected to the cavity.
[0016] Furthermore, the annular abutment member is arranged with one end away from the catalyst specimen extending into the cavity, and the clamping member also includes a fastening mounting plate arranged on the outer wall of the protruding end of the annular abutment member, and the fastening mounting plate and the side wall of the sealing member close to the cavity are detachably connected through fastener I.
[0017] Furthermore, the fasteners I are arranged in a plurality of groups in a circular array around the axis of the fastening mounting plate.
[0018] Furthermore, the blocking member can detachably block the opening via a fastener II.
[0019] Furthermore, a sealing ring I is provided between the blocking member and the main body.
[0020] Furthermore, the catalyst permeability experimental device also includes a pressure sensor for detecting the pressure in the cavity.
[0021] The beneficial effect of the utility model is that the catalyst permeability test device mounts the catalyst test piece to be tested on the test piece mounting piece instead of the main body, which makes it convenient for the staff to disassemble and assemble the catalyst test piece to be tested, so as to facilitate the replacement of the catalyst test piece to be tested. In addition, the catalyst test piece is installed using the test piece mounting hole, which can avoid gas leakage and improve the accuracy of the permeability test. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Attached Figure 1 It is a structural schematic diagram of the utility model.
[0023] In the figure, 1-main body; 101-air inlet; 102-cavity; 103-opening; 2-catalyst specimen; 3-sealing member; 301-specimen mounting hole; 302-specimen limiting structure; 303-air outlet; 4-mounting hole; 5-sealing ring I; 6-annular matching member; 7-pressing member; 71-annular abutting member; 72-fastening mounting plate; 8-fastener I; 9-sealing ring II; 10-pressure sensor. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0026] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0029] As attached Figure 1 As shown, the utility model provides a catalyst permeability experimental device, including a main body 1 and a test piece mounting part;
[0030] The main body 1 is provided with a cavity 102 for containing gas, and the cavity 102 is provided with an opening 103 and an air inlet 101, wherein the opening 103 is used to install a specimen mounting member, and the air inlet 101 is used to transport gas into the cavity 102;
[0031] The test piece installation part includes a plugging part 3 and a pressing part 7. The plugging part 3 can detachably block the opening 103. When the plugging part 3 blocks the opening 103, the cavity 102 forms a closed cavity. When the plugging part 3 is removed from the opening 103, the catalyst test piece 2 can be disassembled. The plugging part 3 is provided with a test piece installation hole 301. One end of the test piece installation hole 301 is connected to the cavity 102, and the other end is provided with a test piece limiting structure 302 and an air outlet 303. The catalyst test piece 2 to be subjected to the air permeability test is installed in the cavity 102. The catalyst specimen 2 is placed in the specimen mounting hole 301 and abutted against the specimen limiting structure 302 through the clamping piece 7. At this time, the catalyst specimen 2 is connected to the air outlet 303 and the cavity 102. When the air inlet 101 continues to transport gas into the cavity 102, the gas pressure in the cavity 102 increases until the gas can be discharged through the catalyst specimen 2 and the air outlet 303, thereby testing the air permeability of the catalyst specimen 2 and evaluating the pore structure of the catalyst specimen 2 to be tested and its permeability to fluids (such as gas or liquid).
[0032] The catalyst permeability test device installs the catalyst test piece 2 to be tested on the test piece installation part instead of the main body 1, which is convenient for the staff to disassemble and install the catalyst test piece 2, so as to facilitate the replacement of the catalyst test piece 2 to be tested. In addition, the catalyst test piece 2 is installed using the test piece installation hole 301, which can avoid gas leakage and improve the accuracy of the permeability test. That is, the present invention has a simple and reliable structure, convenient and quick disassembly and assembly of the catalyst test piece 2, and high test accuracy.
[0033] In one embodiment, the specimen limiting structure 302 is an annular plate disposed at the end of the specimen mounting hole 301, and the outer ring of the annular plate is connected to the inner wall of the specimen mounting hole 301. Preferably, the annular plate and the specimen mounting hole 301 are integrally formed. In this case, the inner ring of the annular plate and the specimen mounting hole 301 form a stepped hole structure, and the inner ring of the annular plate forms the air outlet 303.
[0034] The cross-sectional size of the catalyst specimen 2 is larger than the inner ring size of the annular plate, so that the catalyst specimen 2 cannot slide out from the air outlet 303. On the one hand, it can limit the catalyst specimen 2, and on the other hand, it can make the gas passing through the catalyst specimen 2 directly discharge from the cavity 102 from the air outlet 303. The specimen limiting structure 302 provided in this embodiment is fixed to or integrated with the specimen mounting hole 301, which simplifies the structural difficulty. When installing the catalyst specimen 2, it is only necessary to install the catalyst specimen 2 from one end of the specimen mounting hole 301 close to the cavity 102, which is convenient and quick to operate. It should be noted that when disassembling and assembling the catalyst specimen 2, the sealing member 3 needs to be removed from the main body 1 to facilitate the operation of the catalyst specimen 2 and the clamping member 7.
[0035] In one embodiment, the catalyst permeability test device further includes an annular fitting 6, the outer wall of which is fitted with the inner wall of the specimen mounting hole 301, which can prevent the annular fitting 6 from shaking in the specimen mounting hole 301, and can also prevent gas from flowing between the outer wall of the annular fitting 6 and the inner wall of the specimen mounting hole 301. The inner wall of the annular fitting 6 is fitted with the outer wall of the catalyst specimen 2, thereby fastening the catalyst specimen 2. When the size of the catalyst specimen 2 changes, the catalyst permeability test device can be adapted by simply replacing the annular fitting 6 with a different inner ring size, that is, the adaptability of the catalyst permeability test device is improved, and catalyst specimens 2 of different sizes can be adapted by only replacing the annular fitting 6.
[0036] In one embodiment, a sealing ring II9 is further provided between the catalyst specimen 2 and the specimen limiting structure 302, thereby preventing gas from leaking from the specimen mounting hole 301 or the side wall of the annular fitting 6 and affecting the test accuracy.
[0037] In one embodiment,
[0038] The annular abutment member 71 is detachably arranged in the test piece installation hole 301, and the inner ring size of the annular abutment member 71 is smaller than the cross-sectional size of the catalyst test piece 2. The end of the annular abutment member 71 abuts against the catalyst test piece 2, so that the catalyst test piece 2 can be pressed against the test piece limiting structure 302. In the embodiment with the sealing ring II9, the catalyst test piece 2 is pressed against the sealing ring II9, which can improve the installation stability of the catalyst test piece 2 on the one hand, and reduce the possibility of gas leakage on the other hand, thereby improving the test accuracy;
[0039] One end of the inner circle of the annular abutment member 71 is connected to the end of the catalyst specimen 2 , and the other end is connected to the cavity 102 , that is, the inner circle of the annular abutment member 71 is used to circulate gas, so that the gas in the cavity 102 can pass through the catalyst specimen 2 smoothly and be discharged from the gas outlet 303 .
[0040] In one embodiment, the annular abutment member 71 is arranged with one end away from the catalyst specimen 2 extending into the cavity 102, and the pressing member 7 further comprises a fastening mounting plate 72 arranged on the outer wall of the protruding end of the annular abutment member 71, and the fastening mounting plate 72 is detachably connected to the side wall of the blocking member 3 close to the cavity 102 through a fastener Ⅰ8. In this embodiment, the annular abutment member 71 is detachably connected through the fastening mounting plate 72, so that the pressing member 7 can be quickly and conveniently disassembled and assembled, thereby facilitating the rapid disassembly and assembly of the catalyst specimen 2.
[0041] In one of the embodiments, the fasteners I8 are arranged in a ring array in multiple groups around the axis of the fastening mounting plate 72, thereby improving the fixing stability of the annular abutment member 71 and ensuring the pressure balance of the annular abutment member 71 against the catalyst specimen 2, thereby avoiding pressure deformation of the catalyst specimen 2 caused by the pressing member 7.
[0042] In an exemplary embodiment, the catalyst specimen 2 is a cylinder, the specimen mounting hole 301 is a circular hole, and the annular fitting member 6 and the annular abutting member 71 are circular ring members. That is, the cross-sectional shapes of the specimen mounting hole 301, the annular fitting member 6 and the annular abutting member 71 are adapted to the cross-sectional shape of the catalyst specimen 2.
[0043] In other embodiments, the outer wall of the annular abutment member 71 may be directly threadedly engaged with the specimen mounting hole 301 , thereby achieving a detachable and fastened engagement of the annular abutment member 71 .
[0044] In one embodiment, the blocking member 3 can detachably block the opening 103 through a fastener II, and the fastener can be a fastening bolt. In this case, it is only necessary to set mounting holes 4 at corresponding positions on the end surface of the opening 103 and the blocking member 3. In other embodiments, the blocking member 3 and the opening 103 can also be threaded.
[0045] In one of the embodiments, a sealing ring Ⅰ5 is further provided between the blocking member 3 and the main body 1, thereby improving the air tightness of the cavity 102 and improving the test accuracy.
[0046] In one embodiment, the catalyst permeability experimental device further includes a pressure sensor 10 for detecting the pressure in the cavity 102, which is used to detect the pressure change in the cavity 102 and obtain experimental data.
[0047] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
Claims
1. A catalyst permeability experimental device, characterized in that: It comprises a main body (1) and a test piece mounting part; A cavity (102) is provided in the main body (1), and an opening (103) and an air inlet (101) are provided on the cavity (102); The specimen mounting member comprises a blocking member (3) and a pressing member (7); the blocking member (3) can detachably block the opening (103); a specimen mounting hole (301) is provided on the blocking member (3); one end of the specimen mounting hole (301) is connected to the cavity (102); the other end is provided with a specimen limiting structure (302) and an air outlet (303); a catalyst specimen (2) to be subjected to a gas permeability test is mounted in the specimen mounting hole (301) and abuts against the specimen limiting structure (302) via the pressing member (7).
2. The catalyst permeability test device as claimed in claim 1, characterized in that: The specimen limiting structure (302) is an annular plate arranged at the end of the specimen mounting hole (301), the outer ring of the annular plate is connected to the inner wall of the specimen mounting hole (301), and the inner ring of the annular plate forms the air outlet (303); The cross-sectional dimensions of the catalyst test piece (2) are larger than the inner ring dimensions of the annular plate.
3. The catalyst permeability test device as claimed in claim 2, characterized in that: It also comprises an annular fitting part (6), the outer wall of which is fitted with the inner wall of the test piece installation hole (301), and the inner wall of which is fitted with the outer wall of the catalyst test piece (2).
4. The catalyst permeability test device as claimed in claim 3, characterized in that: A sealing ring II (9) is also provided between the catalyst test piece (2) and the test piece limiting structure (302).
5. The catalyst permeability test device according to any one of claims 1 to 4, characterized in that: The pressing member (7) comprises an annular abutment member (71); The annular abutment member (71) is detachably arranged in the test piece mounting hole (301), the inner ring size of the annular abutment member (71) is smaller than the cross-sectional size of the catalyst test piece (2), and the end of the annular abutment member (71) abuts against the catalyst test piece (2); One end of the inner ring of the annular abutment member (71) is connected to the end of the catalyst specimen (2), and the other end is connected to the cavity (102).
6. The catalyst permeability test device as claimed in claim 5, characterized in that: The end of the annular abutment member (71) facing away from the catalyst specimen (2) extends into the cavity (102), and the pressing member (7) also includes a fastening mounting plate (72) arranged on the outer wall of the protruding end of the annular abutment member (71), and the fastening mounting plate (72) is detachably connected to the side wall of the sealing member (3) close to the cavity (102) via a fastener I (8).
7. The catalyst permeability test device as claimed in claim 6, characterized in that: The fasteners I (8) are arranged in a plurality of groups in a circular array around the axis of the fastening mounting plate (72).
8. The catalyst permeability test device according to any one of claims 1 to 4, characterized in that: The blocking member (3) can be detachably blocked from the opening (103) by means of a fastener II.
9. The catalyst permeability test device according to any one of claims 1 to 4, characterized in that: A sealing ring I (5) is also provided between the blocking member (3) and the main body (1).
10. The catalyst permeability test device according to any one of claims 1 to 4, characterized in that: It also includes a pressure sensor (10) for detecting the pressure in the cavity (102).