Pharmacopoeia standard inspection sieve

Abstract

The utility model discloses a pharmacopoeia standard inspection sieve, which relates to the technical field of pharmacopoeia standard inspection sieves, and comprises an inspection sieve main body used for screening medicine particles; the inspection screen cover body is arranged at the top of the inspection screen main body, is detachably connected with the inspection screen main body and is used for preventing the medicine particles from scattering during screening; the material receiving chassis is arranged at the bottom of the inspection screen main body, is detachably connected with the inspection screen main body and is used for collecting screened medicine particles; wherein the material receiving base plate comprises a mounting ring body, a material receiving funnel and a sealing assembly, the material receiving funnel is arranged at the bottom of the mounting ring body and fixedly connected with the mounting ring body, a discharging pipe is arranged below the material receiving funnel, and the sealing assembly is arranged on the discharging pipe and used for achieving material storage and discharging of the material receiving funnel. The medicine particles are inconvenient to transfer and are easy to scatter when being transferred.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmacopoeia standard test sieves, in particular to a pharmacopoeia standard test sieve. Background Art

[0002] A pharmacopoeial test sieve is a screening tool used for quality testing of pharmaceuticals and pharmaceutical excipients. It tests the particle size and distribution of pharmaceuticals according to pharmacopoeial standards to ensure compliance with relevant quality standards. Pharmacopoeias are often found in pharmaceutical regulations in various countries and regions, such as the Chinese Pharmacopoeia and the United States Pharmacopoeia.

[0003] Pharmacopoeia standard test sieves are mostly used in sets, that is, they have multiple sieve bodies, and the screen mesh in each sieve body has a different aperture, so as to meet the usage specifications in the pharmacopoeia. Pharmacopoeia standard test sieves generally also include a cover body and a receiving base plate to facilitate the screening of medicines. In the process of screening pharmaceutical powder particles, the pharmaceutical particles that meet the specifications pass through the sieve mesh and fall into the receiving base plate, and then are transferred from the receiving base plate to the next container. We found during use that since the current receiving base plates are all disc-shaped frames, when transferring pharmaceutical particles, it is necessary to tilt the receiving base plate to pour out the pharmaceutical particles, and the pharmaceutical particles are prone to spilling, especially when using tools to transfer pharmaceutical particles attached to the side wall of the receiving base plate. More spills occur. Therefore, this leads to the problem that the current pharmacopoeia standard test sieves are inconvenient to transfer pharmaceutical particles when in use, and pharmaceutical particles are prone to spilling when transferred.

[0004] In the utility model with application number: CN201922119513.5 and publication number: CN211100123U, a test screen device is disclosed, including a screen frame and a screen mesh plate fixed to the bottom of the screen frame. The inner bottom end of the screen mesh plate is integrally formed with a screen, and an elastic connecting mechanism is welded and fixed to the outer wall of the screen mesh plate. A number of mesh holes are provided on the screen. When in use, there is still a problem of inconvenience in transferring drug particles and the drug particles are easily spilled during transfer. Utility Model Content

[0005] Based on this, in order to solve the above problems, the present invention proposes a pharmacopoeia standard test sieve, which solves the problem that the current pharmacopoeia standard test sieve is inconvenient for transferring drug particles and the drug particles are easily spilled during transfer.

[0006] The technical solution of the utility model is:

[0007] A pharmacopoeia standard test sieve, comprising:

[0008] The main body of the test sieve is used to screen the drug particles;

[0009] The test sieve cover is arranged on the top of the test sieve body and is detachably connected to the test sieve body to prevent the drug particles from spilling during screening;

[0010] The receiving chassis is arranged at the bottom of the test sieve body and is detachably connected to the test sieve body, and is used to collect the sieved drug particles;

[0011] Among them, the material receiving chassis includes a mounting ring body, a material receiving funnel and a closing component. The material receiving funnel is arranged at the bottom of the mounting ring body and is fixedly connected to the mounting ring body. A discharge pipe is provided below the material receiving funnel, and the closing component is arranged on the discharge pipe to realize the storage and discharge of materials in the material receiving funnel.

[0012] Preferably, the closing assembly includes a closing disc, a rotating member and a fastening member, one end of the closing disc is rotatably connected to the discharge pipe through the rotating member, and the other end is fastened to the discharge pipe through the fastening member.

[0013] Preferably, the rotating member includes a first fixed shaft, a fixed arm, a second fixed shaft, a rotating arm, a pair of first fixed blocks and a pair of second fixed blocks, the pair of first fixed blocks are fixedly arranged on the discharge pipe, the first fixed shaft is arranged between the pair of first fixed blocks, and the two ends respectively pass through the pair of first fixed blocks and are fixedly connected to the first fixed blocks, one end of the fixed arm is fixedly connected to the first fixed shaft, a pair of second fixed blocks are fixedly arranged on the closing disk, the second fixed shaft is arranged between the pair of second fixed blocks, and the two ends respectively pass through the pair of second fixed blocks and are fixedly connected to the second fixed blocks, one end of the rotating arm is fixedly connected to the second fixed shaft, and the other end of the fixed arm is rotatably connected to the other end of the rotating arm through the rotating shaft.

[0014] Preferably, the fastening part includes a rotating fastening block, a fastening rotating rod, a fixed fastening block, a locking screw and a pair of third fixed blocks. The pair of third fixed blocks are fixedly arranged on the discharge pipe. The fastening rotating rod is arranged between the pair of third fixed blocks, and both ends respectively pass through the pair of third fixed blocks and are rotatably connected to the third fixed blocks. One end of the rotating fastening block is fixedly connected to the fastening rotating rod, and the fixed fastening block is fixedly arranged on the closing disk. The rotating fastening block is provided with a fastening groove which is matched with the fixed fastening block. One end of the fixed fastening block can pass through the fastening groove. One end of the locking screw passes through one end of the fixed fastening block passing through the fastening groove and is threadedly connected to the fixed fastening block.

[0015] Preferably, the inspection screen body includes a screening frame and a screening assembly, a screening cavity is provided in the screening frame which passes through the screening frame from top to bottom, the screening assembly includes a connecting frame and a screen, a connecting cavity is provided in the connecting frame which passes through the connecting frame from top to bottom, the screen is arranged at the bottom of the connecting cavity and is fixedly connected to the connecting frame, the lower end of the screening frame can be inserted into the connecting cavity, and the screening cavity can contact and cooperate with the screen, and the top of the connecting frame is detachably connected to the upper end of the screening frame by bolts.

[0016] Preferably, a pair of limit blocks are provided on the mounting ring body, and a sliding groove and a pair of insertion grooves are provided on the connecting frame body to cooperate with the pair of limit blocks. The pair of insertion grooves are respectively provided on both sides of the bottom of the connecting frame body and are respectively connected to the sliding grooves. The pair of limit blocks can be inserted into the sliding grooves through the pair of insertion grooves and can slide along the sliding grooves.

[0017] Preferably, a pair of limit blocks are respectively provided with a first hand-held part, the pair of first hand-held parts are respectively fixedly connected to the pair of limit blocks, and the screening frame is provided with a pair of second hand-held parts matched with the pair of first hand-held parts.

[0018] Preferably, a plurality of grooves are provided on the first handle part and the second handle part.

[0019] Preferably, the lower end of the inspection sieve cover can be inserted into the screening cavity, and the inspection sieve cover can be buckled with the screening frame.

[0020] Preferably, the lower end of the inspection screen cover can be inserted into the screening cavity and is threadedly connected to the inner side wall of the screening frame.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The present invention configures a receiving base plate to mount a ring, receiving funnel, and closure assembly. During screening, the closure assembly first closes the discharge pipe, allowing the receiving funnel to complete material storage. The test sieve body then screens the pharmaceutical particles, allowing those that meet the requirements to fall into the receiving funnel and be stored there. When transfer is needed, the closure assembly is simply opened, and the discharge pipe below the receiving funnel is aligned with the vessel of the next stage to release the pharmaceutical particles. Compared to conventional receiving base plates, the pharmacopoeia standard test sieve of the present invention does not require tilting during use, effectively preventing pharmaceutical particles from spilling. This solves the problem with current pharmacopoeia standard test sieves, which are inconvenient to transfer pharmaceutical particles and prone to spilling during transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a pharmacopoeia standard test sieve described in an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the explosion structure of a pharmacopoeia standard test sieve described in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the material receiving chassis described in the embodiment of the utility model Figure 1 ;

[0026] Figure 4 It is described in the embodiment of the utility model Figure 3Schematic diagram of the local enlarged structure at A in the middle;

[0027] Figure 5 This is a schematic diagram of the structure of the material receiving chassis described in the embodiment of the utility model Figure 2 ;

[0028] Figure 6 It is described in the embodiment of the utility model Figure 5 Schematic diagram of the local enlarged structure at A in the middle;

[0029] Figure 7 It is a structural schematic diagram of the screening frame described in the embodiment of the present utility model;

[0030] Figure 8 It is a structural diagram of the screening assembly described in an embodiment of the present utility model;

[0031] Figure 9 It is a structural schematic diagram of the support member described in an embodiment of the present utility model;

[0032] Description of reference numerals:

[0033] 10-test sieve body, 100-screening frame, 101-screening assembly, 102-screening chamber, 103-connecting frame, 104-screen, 105-connecting chamber, 106-sliding slot, 107-insertion slot, 108-second handheld part, 20-test sieve cover, 30-material receiving chassis, 300-mounting ring, 301-material receiving funnel, 302-closing assembly, 303-discharge pipe, 304-closing disk, 305-rotating part, 306-fastening part, 307-first fixed axis, 308-fixed arm, 309-second fixed axis, 310-rotating arm, 311-first fixed block, 312-second fixed block, 313-rotating axis, 314-rotating snap-fit block, 315-snap-fit rotating rod, 316-fixed snap-fit block, 317-locking screw, 318-third fixed block, 319-snap-fit groove, 320-limiting block, 321-first hand-held part, 40-support member, 400-support ring body, 401-support rod. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] Example:

[0036] like Figures 1 to 6 As shown, in order to solve the above problems, this embodiment discloses a pharmacopoeia standard test sieve, comprising:

[0037] The test sieve body 10 is used to screen the drug particles;

[0038] The test sieve cover 20 is provided on the top of the test sieve body 10 and is detachably connected to the test sieve body 10 to prevent drug particles from spilling during screening;

[0039] The receiving chassis 30 is provided at the bottom of the test sieve body 10 and is detachably connected to the test sieve body 10 for collecting the sieved drug particles;

[0040] Among them, the material receiving chassis 30 includes a mounting ring body 300, a material receiving funnel 301 and a closing component 302. The material receiving funnel 301 is arranged at the bottom of the mounting ring body 300 and is fixedly connected to the mounting ring body 300. A discharge pipe 303 is provided below the material receiving funnel 301, and the closing component 302 is arranged on the discharge pipe 303 for realizing the storage and discharge of materials in the material receiving funnel 301.

[0041] The present invention arranges a receiving base plate 30 for mounting a ring body 300, a receiving funnel 301, and a closure assembly 302. During screening, the closure assembly 302 first closes the discharge pipe 303, allowing the receiving funnel 301 to complete material storage. The drug particles are then screened by the test sieve body 10, and the drug particles that meet the requirements fall into the receiving funnel 301 and are stored there. When transfer is required, the closure assembly 302 only needs to be opened, and the discharge pipe 303 below the receiving funnel 301 is aligned with the vessel of the next stage to release the drug particles. Compared to the conventional receiving base plate 30, the pharmacopoeia standard test sieve of the present invention does not need to be tilted during use, thereby effectively preventing drug particles from spilling. This solves the problem that the current pharmacopoeia standard test sieve is inconvenient for transferring drug particles during use and drug particles are easily spilled during transfer.

[0042] like Figures 3 to 6 As shown, in order to facilitate the use of the closing component 302, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the closing component 302 includes a closing disk 304, a rotating member 305 and a fastening member 306. One end of the closing disk 304 is rotatably connected to the discharge pipe 303 through the rotating member 305, and the other end is fastened to the discharge pipe 303 through the fastening member 306.

[0043] The closing disk 304 is disposed at the bottom of the discharge pipe 303 and is used to close the discharge pipe 303 .

[0044] Among them, the rotating part 305 includes a first fixed shaft 307, a fixed arm 308, a second fixed shaft 309, a rotating arm 310, a pair of first fixed blocks 311 and a pair of second fixed blocks 312. The pair of first fixed blocks 311 are fixedly set on the discharge pipe 303. The first fixed shaft 307 is set between the pair of first fixed blocks 311, and the two ends respectively pass through the pair of first fixed blocks 311 and are fixedly connected to the first fixed blocks 311. One end of the fixed arm 308 is fixedly connected to the first fixed shaft 307. A pair of second fixed blocks 312 are fixedly set on the closing disk 304. The second fixed shaft 309 is set between the pair of second fixed blocks 312, and the two ends respectively pass through the pair of second fixed blocks 312 and are fixedly connected to the second fixed block 312. One end of the rotating arm 310 is fixedly connected to the second fixed shaft 309, and the other end of the fixed arm 308 is rotatably connected to the other end of the rotating arm 310 through the rotating shaft 313.

[0045] When in use, the rotating arm 310 can be rotatably connected to the fixed arm 308 around the rotating shaft 313, thereby realizing the rotatable connection between one end of the closing disk 304 and the discharge pipe 303.

[0046] Among them, the fastening part 306 includes a rotating fastening block 314, a fastening rotating rod 315, a fixed fastening block 316, a locking screw 317 and a pair of third fixed blocks 318. The pair of third fixed blocks 318 are fixedly set on the discharge pipe 303. The fastening rotating rod 315 is set between the pair of third fixed blocks 318, and the two ends respectively pass through the pair of third fixed blocks 318 and are rotatably connected to the third fixed blocks 318. One end of the rotating fastening block 314 is fixedly connected to the fastening rotating rod 315, and the fixed fastening block 316 is fixedly set on the closing disk 304. The rotating fastening block 314 is provided with a fastening groove 319 which is matched with the fixed fastening block 316. One end of the fixed fastening block 316 can pass through the fastening groove 319. One end of the locking screw 317 passes through the fixed fastening block 316 and one end of the fastening groove 319 and is threadedly connected to the fixed fastening block 316.

[0047] When in use, the rotating snap-fit block 314 can be driven to make the fixed snap-fit block 316 pass through the snap-fit groove 319, and then one end of the locking screw 317 can be screwed into the fixed snap-fit block 316, so that the rotating snap-fit block 314 and the fixed snap-fit block 316 form a fixed fit, so that the other end of the closing disk 304 can be snapped with the discharge port, so that the closing disk 304 can close the discharge pipe 303.

[0048] like Figures 7 and 8As shown, in order to facilitate the screening of different pharmaceutical particles, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the test sieve main body 10 includes a screening frame 100 and a screening assembly 101. The screening frame 100 is provided with a screening cavity 102 that passes through the screening frame 100 from top to bottom. The screening assembly 101 includes a connecting frame 103 and a screen 104. The connecting frame 103 is provided with a connecting cavity 105 that passes through the connecting frame 103 from top to bottom. The screen 104 is arranged at the bottom of the connecting cavity 105 and is fixedly connected to the connecting frame 103. The lower end of the screening frame 100 can be inserted into the connecting cavity 105, and the screening cavity 102 can contact and cooperate with the screen 104. The top of the connecting frame 103 is detachably connected to the upper end of the screening frame 100 by bolts.

[0049] Preferably, there are several screening assemblies 101 , and the apertures of the screens 104 in the several screening assemblies 101 are different. The apertures of the screens 104 can be set according to pharmacopoeia standards.

[0050] For example, the number of screening assemblies 101 is 9, and the apertures of the screens 104 in the 9 screening assemblies 101 are 2 mm, 0.85 mm, 0.355 mm, 0.25 mm, 0.18 mm, 0.15 mm, 0.125 mm, 0.09 mm, and 0.075 mm, respectively.

[0051] By dividing the test sieve body 10 into a screening frame 100 and a screening assembly 101, and detachably connecting the connecting frame 103 in the screening assembly 101 to the screening frame 100 via bolts, the screening assembly 101 is replaceable. When screening pharmaceutical particles, it is only necessary to install the screening assembly 101 with different pore sizes and the screening frame 100.

[0052] like Figure 3 、 Figure 8 As shown, in order to facilitate the connection between the inspection screen body 10 and the material receiving chassis 30, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that a pair of limit blocks 320 are provided on the mounting ring body 300, and a sliding groove 106 and a pair of insertion grooves 107 are provided on the connecting frame 103 to cooperate with the pair of limit blocks 320. The pair of insertion grooves 107 are respectively provided on both sides of the bottom of the connecting frame 103 and are respectively connected to the sliding groove 106. The pair of limit blocks 320 can be inserted into the sliding groove 106 by the pair of insertion grooves 107 respectively, and can slide along the sliding groove 106.

[0053] During use, a pair of limit blocks 320 on the mounting ring 300 in the material receiving chassis 30 can be inserted into the pair of insertion grooves 107 on the connecting frame 103 in the inspection screen body 10 respectively, and then the inspection screen body 10 is rotated to make the pair of limit blocks 320 slide in the sliding grooves 106 so that the pair of limit blocks 320 no longer correspond to the pair of insertion grooves 107, thereby completing the connection between the inspection screen body 10 and the material receiving chassis 30.

[0054] In order to prevent the problem of separation of the inspection screen body 10 and the material receiving chassis 30 during the screening process, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that a pair of limit blocks 320 are respectively provided with a first hand-held part 321, and the pair of first hand-held parts 321 are respectively fixedly connected to the pair of limit blocks 320, and the screening frame 100 is provided with a pair of second hand-held parts 108 that are arranged to cooperate with the pair of first hand-held parts 321.

[0055] Preferably, a plurality of grooves are provided on the first handle portion 321 and the second handle portion 108 .

[0056] The provision of the grooves can increase the friction between the hand and the first handle portion 321 and the second handle portion 108 .

[0057] When in use, you can use both hands to pinch the first hand-held part 321 and the second hand-held part 108 respectively, and apply external force to make the connection between the inspection screen body 10 and the receiving base 30 more stable, so as to avoid separation of the inspection screen body 10 and the receiving base 30 during the screening process.

[0058] In order to facilitate the connection between the inspection sieve cover 20 and the inspection sieve main body 10, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the lower end of the inspection sieve cover 20 can be inserted into the screening cavity 102, and the inspection sieve cover 20 can be buckled with the screening frame 100.

[0059] In another embodiment, in order to make the connection between the test sieve cover 20 and the test sieve body 10 more stable, the lower end of the test sieve cover 20 can be inserted into the screening cavity 102 and threadedly connected to the inner wall of the screening frame 100 .

[0060] like Figure 9As shown, due to the shape of the material receiving chassis 30 in the present invention, the present invention is prone to unstable placement during normal placement. In order to solve this problem, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that it also includes a support member 40, and the support member 40 includes a pair of support ring bodies 400 and a plurality of support rods 401 arranged between the pair of support ring bodies 400. The material receiving chassis 30 is arranged in conjunction with the support ring body 400, wherein the material receiving funnel 301 can be inserted into the support ring body 400, and the bottom of the mounting ring body 300 can be in contact with the top of the support ring body 400.

[0061] When placing, the material receiving base plate 30 can be placed on the support member 40, thereby facilitating the stable placement of the utility model.

[0062] Working principle of this utility model:

[0063] The present invention configures a receiving base 30 for mounting a ring body 300, a receiving funnel 301, and a closure assembly 302. During screening, the closure assembly 302 first closes the discharge pipe 303, allowing the receiving funnel 301 to complete material storage. The drug particles are then screened by the test sieve body 10, and the drug particles that meet the requirements fall into the receiving funnel 301 and are stored there. When transferring, the closure assembly 302 is simply opened, and the discharge pipe 303 below the receiving funnel 301 is aligned with the vessel of the next stage to release the drug particles. Compared to conventional receiving bases 30, the pharmacopoeia standard test sieve of the present invention does not need to be tilted during use, effectively preventing drug particles from spilling.

[0064] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A pharmacopoeia standard test sieve, characterized in that, include: A test sieve body (10) for screening drug particles; A test sieve cover (20) is provided on the top of the test sieve body (10) and is detachably connected to the test sieve body (10) to prevent drug particles from spilling during screening; a material receiving chassis (30), which is arranged at the bottom of the inspection sieve body (10) and is detachably connected to the inspection sieve body (10) and is used to collect the sieved drug particles; The receiving chassis (30) comprises a mounting ring (300), a receiving funnel (301) and a closing assembly (302). The receiving funnel (301) is arranged at the bottom of the mounting ring (300) and is fixedly connected to the mounting ring (300). A discharge pipe (303) is provided below the receiving funnel (301). The closing assembly (302) is arranged on the discharge pipe (303) to realize material storage and discharge of the receiving funnel (301).

2. A pharmacopoeia standard test sieve according to claim 1, characterized in that, The closing assembly (302) comprises a closing disc (304), a rotating member (305) and a fastening member (306); one end of the closing disc (304) is rotatably connected to the discharge pipe (303) via the rotating member (305), and the other end is fastened to the discharge pipe (303) via the fastening member (306).

3. A pharmacopoeia standard test sieve according to claim 2, characterized in that, The rotating member (305) includes a first fixed shaft (307), a fixed arm (308), a second fixed shaft (309), a rotating arm (310), a pair of first fixed blocks (311) and a pair of second fixed blocks (312). The pair of first fixed blocks (311) are fixedly arranged on the discharge pipe (303). The first fixed shaft (307) is arranged between the pair of first fixed blocks (311), and the two ends of the first fixed shaft (307) respectively pass through the pair of first fixed blocks (311) and are fixedly connected to the first fixed blocks (311). The fixed arm (308) ) one end is fixedly connected to the first fixed shaft (307), a pair of second fixed blocks (312) are fixedly arranged on the closing disk (304), the second fixed shaft (309) is arranged between the pair of second fixed blocks (312), and the two ends respectively pass through the pair of second fixed blocks (312) and are fixedly connected to the second fixed blocks (312), one end of the rotating arm (310) is fixedly connected to the second fixed shaft (309), and the other end of the fixed arm (308) is rotatably connected to the other end of the rotating arm (310) via the rotating shaft (313).

4. A pharmacopoeia standard test sieve according to claim 3, characterized in that, The fastening member (306) includes a rotating fastening block (314), a fastening rotating rod (315), a fixed fastening block (316), a locking screw (317) and a pair of third fixed blocks (318). The pair of third fixed blocks (318) are fixedly arranged on the discharge pipe (303). The fastening rotating rod (315) is arranged between the pair of third fixed blocks (318), and the two ends of the fastening rotating rod (315) respectively pass through the pair of third fixed blocks (318) and are rotatably connected to the third fixed blocks (318). The rotating fastening block (314) is fixedly arranged on the discharge pipe (303). 14) one end is fixedly connected to the buckling rotating rod (315), the fixed buckling block (316) is fixedly set on the closing disk (304), the rotating buckling block (314) is provided with a buckling groove (319) matched with the fixed buckling block (316), one end of the fixed buckling block (316) can pass through the buckling groove (319), one end of the locking screw (317) passes through the fixed buckling block (316) and passes through one end of the buckling groove (319), and is threadedly connected to the fixed buckling block (316).

5. A pharmacopoeia standard test sieve according to claim 1 or 4, characterized in that, The inspection screen body (10) comprises a screening frame (100) and a screening assembly (101); a screening cavity (102) penetrating the screening frame (100) from top to bottom is provided in the screening frame (100); the screening assembly (101) comprises a connecting frame (103) and a screen (104); a connecting cavity (105) penetrating the connecting frame (103) from top to bottom is provided in the connecting frame (103); the screen (104) is arranged at the bottom of the connecting cavity (105) and is fixedly connected to the connecting frame (103); the lower end of the screening frame (100) can be inserted into the connecting cavity (105), and the screening cavity (102) can contact and cooperate with the screen (104); the top of the connecting frame (103) and the upper end of the screening frame (100) are detachably connected by bolts.

6. A pharmacopoeia standard test sieve according to claim 5, characterized in that, A pair of limit blocks (320) are provided on the mounting ring body (300), and a sliding groove (106) and a pair of insertion grooves (107) are provided on the connecting frame body (103) to cooperate with the pair of limit blocks (320). The pair of insertion grooves (107) are respectively provided on both sides of the bottom of the connecting frame body (103) and are respectively communicated with the sliding groove (106). The pair of limit blocks (320) can be respectively inserted into the sliding groove (106) through the pair of insertion grooves (107) and can slide along the sliding groove (106).

7. A pharmacopoeia standard test sieve according to claim 6, characterized in that, A pair of limit blocks (320) are respectively provided with a first hand-held portion (321), and the pair of first hand-held portions (321) are respectively fixedly connected to the pair of limit blocks (320). The screening frame (100) is provided with a pair of second hand-held portions (108) arranged in cooperation with the pair of first hand-held portions (321).

8. A pharmacopoeia standard test sieve according to claim 7, characterized in that, A plurality of grooves are provided on the first hand-held portion (321) and the second hand-held portion (108).

9. A pharmacopoeia standard test sieve according to claim 8, characterized in that, The lower end of the inspection screen cover (20) can be inserted into the screening cavity (102), and the inspection screen cover (20) can be buckled with the screening frame (100).

10. A pharmacopoeia standard test sieve according to claim 8, characterized in that: The lower end of the inspection screen cover (20) can be inserted into the screening cavity (102) and is threadedly connected to the inner wall of the screening frame (100).

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