Raw material screening device for heparin sodium processing

Abstract

The utility model discloses a raw material screening device for heparin sodium processing, which relates to the technical field of heparin sodium processing and comprises a base plate, a concave seat is fixedly mounted at the top of the base plate, two groups of mounting mechanisms are arranged in the concave seat, two groups of filtering mechanisms are mounted on the inner side of the concave seat through the mounting mechanisms, and the filtering mechanisms are mounted on the inner side of the concave seat through the mounting mechanisms. And the filtering mechanism is obliquely arranged in the concave seat. By the adoption of the structure, materials can be placed in the filter screen at the upper end during use, the driving motor is started to drive the rotating disc, the frame and the conveying blades to rotate, the heparin sodium materials can be conveyed and stirred to be rapidly screened and filtered, and the materials filtered on the upper layer enter the filter screen on the lower layer to be filtered again; due to the fact that the filter screen is inclined and assisted by the stirring assembly, the materials can be smoothly guided out, rapid discharging is achieved, the filter screen does not need to be cleaned frequently, continuous screening and processing can be achieved, and the overall filtering efficiency of the device is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heparin sodium processing technical field, especially relate to a raw material screening device for heparin sodium processing. BACKGROUND

[0002] Heparin sodium is a kind of material widely used in medical and biochemical field, it is extracted from the tissue such as pig or cow's intestinal mucosa one kind of anticoagulant, from the chemical structure, heparin sodium belongs to mucopolysaccharide sulfate material, in medical aspect, its main function is anticoagulation, can prevent blood clotting process, prevent thrombosis, such as when carrying out hemodialysis, heparin sodium can keep liquid state in the process of extracorporeal circulation, avoid coagulation in dialysis equipment, also play a key role in preventing and treating deep vein thrombosis, pulmonary embolism and other diseases, by inhibiting the activity of coagulation factor to interfere with the chain reaction of blood clotting, at the same time, heparin sodium can also be used for in vitro anticoagulation experimental research, help researchers to observe and study the physiological and pathological mechanism related to blood clotting, in the form of drug, heparin sodium has injection and various forms, to facilitate different administration routes and treatment needs;

[0003] The Chinese patent with publication number "CN213612659U" discloses a raw material screening device for heparin sodium processing, which includes a box body, a partition plate is fixedly arranged inside the box body, reciprocating lead screws are symmetrically fixed on the upper and lower left side walls of the partition plate and the box body, the two ends of the two reciprocating lead screws are rotatably connected to the corresponding left side walls of the box body and the partition plate through first bearings, the left ends of the two reciprocating lead screws extend outwardly and penetrate through the left side wall of the box body, and first bevel gears are fixedly sleeved on the left ends of the two reciprocating lead screws, a transmission mechanism is meshingly connected between the two first bevel gears, sliding blocks are threadedly connected to the rod walls of the two reciprocating lead screws, baffles are fixedly connected to the upper surfaces of the two sliding blocks, and first limiting mechanisms are fixedly connected to the lower surfaces of the two sliding blocks, the utility model can finely screen raw materials, quickly disassemble the filter tank, and improve production efficiency.

[0004] The above-mentioned device has certain filtering function during actual use, but there are obvious deficiencies in the filtering process. Generally, the impurities filtered out will adhere to the inside of the filter screen. As the filtering work continues, the filtered impurities continue to accumulate, which will gradually block the filter screen. This condition will seriously affect the filtering efficiency of the filter screen, and the filtering effect will be greatly reduced. When the filter screen is blocked, not only the overall filtering performance of the device will be reduced, but also the device may run poorly or even malfunction. In addition, the design of the above-mentioned device is obviously inconvenient for cleaning the filter screen. Therefore, after the filter screen is blocked, it is difficult to quickly and effectively clean it, which further affects the filtering efficiency and use convenience of the device. Therefore, the device has the problem of low filtering efficiency in the use process, and cannot meet the needs of actual application. Therefore, it is urgent to improve it to improve the filtering performance and use convenience of the device. Content of the utility model

[0005] In view of the problems mentioned in the background art, the purpose of the present application is to provide a raw material screening device for heparin sodium processing to solve the problem of low overall processing efficiency of the existing heparin sodium filtering and screening device.

[0006] The above technical purpose of the present application is realized by the following technical scheme:

[0007] A raw material screening device for heparin sodium processing, comprising a base plate, a concave seat is fixedly installed on the top of the base plate, two groups of mounting mechanisms are arranged in the inside of the concave seat, two groups of filtering mechanisms are mounted on the inside of the concave seat through the mounting mechanisms, the filtering mechanisms are inclinedly arranged in the inside of the concave seat, and a collecting mechanism is arranged at the bottom of the concave seat.

[0008] The filtering mechanism comprises a filter screen, the filter screen is mounted on the inside of the concave seat through the mounting mechanism, a circular plate is welded on the upper end of the filter screen, a driving motor is mounted on the outer side of the middle part of the circular plate through bolts, an agitating assembly is welded on the output end of the driving motor and penetrates the circular plate, the agitating assembly is movably mounted on the inside of the filter screen, and the outer side of the agitating assembly is connected with the inner wall of the filter screen.

[0009] As a preferred technical scheme, the agitating assembly comprises a rotating disc, the rotating disc is rotatably connected to one side of the circular plate close to the filter screen, a frame is welded on the side of the rotating disc close to the filter screen, conveying leaves are welded on the outer side of the frame, the side of the rotating disc away from the filter screen is connected with the output end of the driving motor, and the conveying leaves are spirally arranged as a whole.

[0010] As a preferred technical scheme, the overall cross-sectional shape of the filter screen is arranged in a circular arc shape, the outer surface of the conveying leaves is connected with the inner wall of the filter screen, and the mesh size of the filter screen is 1mm-10mm.

[0011] As a preferred technical scheme, the mounting mechanism comprises side rails, which are welded to the upper and lower ends of the concave seat on the front and back sides, and a sliding plate is slidably connected to the inside of the side rails, the inside of the sliding plate is welded to the two sides of the filter screen, a limiting assembly is mounted on the upper end of the back side of one side rail, the limiting assembly is clamped to the sliding plate, and the outer surfaces of the concave seat, the sliding plate and the side rails are all provided with a circular arc shape.

[0012] As a preferred technical scheme, the limiting assembly comprises a concave bracket and a clamping groove, the concave bracket is welded to the outer end of the back side of the side rail, a limiting spring is fixedly connected to the inside of the concave bracket, a clamping block is fixedly connected to the end of the limiting spring, the clamping groove is arranged on the upper end of the back side of the side rail and the upper end of the back side of the sliding plate, the end of the clamping block is inserted into the clamping groove of the sliding plate through the clamping groove of the side rail, the overall cross-sectional shape of the inner wall of the side rail and the overall cross-sectional shape of the sliding plate are both provided with a convex shape, and a wear-resistant gasket is fixedly connected to the outside of the sliding plate.

[0013] As a preferred technical scheme, the outside of the clamping block is welded with a connecting shaft, the outer end of the connecting shaft is fixedly connected with a pull ring through the concave bracket, a guide hopper is welded and mounted on the bottom of the sliding plate and located at the lower end of the filter screen, a discharge guide pipe is fixedly connected to the output end of the guide hopper, the discharge guide pipe located at the upper end is arranged to be inclined towards the back side, and the discharge guide pipe located at the lower end is arranged to be inclined towards the front side.

[0014] As a preferred technical scheme, the collecting mechanism comprises a sliding groove, which is arranged on the inner bottom of the concave seat on the front and back sides, a sliding strip is slidably connected to the inside of the sliding groove, the sliding strip is slidably connected to the inside of the sliding groove, a collecting frame is welded and mounted on the top of the sliding strip, and the overall cross-sectional shape of the sliding strip and the internal cross-sectional shape of the sliding groove are both provided with a convex shape.

[0015] In summary, the utility model mainly has the following beneficial effects:

[0016] Firstly, during use, the materials are placed in the upper filter screen, the driving motor is started to drive the rotating disc, the frame and the conveying blade to rotate, so that the materials can be conveyed and stirred, the materials are quickly screened and filtered, the materials filtered on the upper layer enter the lower filter screen for further filtering, and then are guided into the collecting assembly through the guide hopper and the discharge guide pipe, the materials can be smoothly guided out due to the inclination of the filter screen and the assistance of the stirring assembly, rapid discharging is realized, the filter screen does not need to be cleaned frequently, continuous screening and processing can be realized, and the overall filtering efficiency of the device is effectively improved.

[0017] Second, during use, the slide plate is inserted into the side rail, the pull ring is pulled to move the clamping block outward, the slide plate is inserted, the pull ring is loosened, the clamping block is pushed into the clamping groove by the limiting spring, the clamping block is clamped with the slide plate to install the filter screen, when disassembling, the pull ring is pulled to make the clamping block disengage from the clamping groove, and the slide plate can be pulled out, the design is beneficial to quickly disassemble and assemble the filter screen, improves the convenience of subsequent maintenance, cleaning and maintenance, reduces the maintenance time, enables the equipment to be quickly put into use again, and improves the sodium heparin material screening processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic diagram of the utility model;

[0019] Figure 2 is the rear view structure schematic diagram of the utility model;

[0020] Figure 3 is the split state structure schematic diagram of the utility model;

[0021] Figure 4 is the filter mechanism structure schematic diagram of the utility model.

[0022] Significant: 1, base plate; 2, collection mechanism; 21, chute; 22, slide; 23, collection frame; 3, mounting mechanism; 31, side rail; 32, slide plate; 33, limiting assembly; 331, concave frame; 332, clamping groove; 333, limiting spring; 334, clamping block; 335, connecting shaft; 336, pull ring; 337, guide hopper; 338, discharge guide pipe; 4, concave seat; 5, filter mechanism; 51, filter screen; 52, round plate; 53, driving motor; 54, stirring assembly; 541, turntable; 542, frame; 543, conveying blade. DETAILED DESCRIPTION

[0023] EMBODIMENT

[0024] Reference Figures 1 to 5 The raw material screening device for processing sodium heparin of the embodiment comprises a base plate 1, a concave seat 4 is fixedly installed at the top of the base plate 1, two groups of mounting mechanisms 3 are arranged in the concave seat 4, two groups of filter mechanisms 5 are installed on the inner side of the concave seat 4 through the mounting mechanisms 3, the filter mechanisms 5 are obliquely arranged in the concave seat 4, and a collection mechanism 2 is arranged at the bottom of the concave seat 4.

[0025] The filtering mechanism 5 comprises a filtering screen 51 installed on the inner side of the concave seat 4 through the mounting mechanism 3, a circular plate 52 welded on the upper end of the filtering screen 51, a driving motor 53 installed on the outer middle part of the circular plate 52 through bolts, an agitating assembly 54 welded on the output end of the driving motor 53 and penetrating through the circular plate 52, and the agitating assembly 54 movably installed on the inner side of the filtering screen 51 and abuttingly connected with the inner wall of the filtering screen 51. The concave seat 4 at the top of the base plate 1 provides a stable support structure for the whole device, the two groups of mounting mechanisms 3 arranged inside the device make the installation and dismounting of the filtering screen 51 extremely convenient, facilitate the subsequent maintenance and cleaning, reduce the maintenance time cost, improve the maintainability of the device, and the two groups of filtering mechanisms 5 are obliquely arranged inside the concave seat 4, which on the one hand increases the filtering area and improves the filtering efficiency, and on the other hand, the oblique arrangement cooperates with the agitating assembly 54 to make the sodium heparin material flow and be agitated more smoothly during the filtering process, promote the rapid screening and filtering of the sodium heparin material inside the filtering screen 51, the circular plate 52 on the upper end of the filtering screen 51 and the driving motor 53 on the outer middle part thereof provide power for the agitating assembly 54, the agitating assembly 54 is movably installed on the inner side of the filtering screen 51 and abuttingly connected with the inner wall of the filtering screen 51, which can ensure that the material fully contacts the filtering screen 51, improve the filtering effect, and automatically discharge the filtered material, realize continuous and uninterrupted screening processing, greatly improve the overall filtering efficiency of the device, and the collecting mechanism 2 at the bottom can timely collect the filtered sodium heparin material, which is convenient for subsequent processing.

[0026] Reference Figures 1-4 The agitating assembly 54 comprises a rotating disc 541 rotatably connected to one side of the circular plate 52 close to the filtering screen 51, a frame 542 welded on one side of the rotating disc 541 close to the filtering screen 51, and conveying blades 543 welded on the outer side of the frame 542, the other side of the rotating disc 541 is connected with the output end of the driving motor 53, the conveying blades 543 are arranged in a spiral shape as a whole, the overall cross-sectional shape of the filtering screen 51 is arranged in a circular arc shape, the outer surface of the conveying blades 543 is abuttingly connected with the inner wall of the filtering screen 51, the mesh size of the filtering screen 51 ranges from 1mm to 10mm, the rotating disc 541 is driven to rotate by the driving motor 53, the frame 542 on one side of the rotating disc 541 and the spiral conveying blades 543 on the outer side thereof rotate accordingly, and the conveying blades 543 are abuttingly connected with the inner wall of the filtering screen 51, which on the one hand can assist in conveying and driving the sodium heparin material inside the filtering screen 51, and on the other hand can agitate the material to promote the rapid screening and filtering of the sodium heparin material inside the filtering screen 51, the overall cross-sectional shape of the filtering screen 51 is in a circular arc shape, the conveying blades 543 are in a spiral shape and the outer surface thereof is abuttingly connected with the inner wall of the filtering screen 51, which can ensure that the material fully contacts the filtering screen 51, improve the filtering effect, and the mesh size of the filtering screen 51 ranges from 1mm to 10mm, which can effectively screen the sodium heparin material with different particle sizes.

[0027] With reference to Figures 1-3 and Figure 5 , the mounting mechanism 3 comprises side rails 31 welded to the upper and lower ends of the concave seat 4 on both sides, a sliding plate 32 slidably connected inside the side rails 31, the inner side of the sliding plate 32 and the two sides of the filter screen 51 are welded, a limiting assembly 33 is installed on the rear upper end of one side rail 31, the limiting assembly 33 is clamped with the sliding plate 32, the outer surfaces of the concave seat 4, the sliding plate 32 and the side rails 31 are all set as arc-shaped at the corners, the limiting assembly 33 comprises a concave bracket 331 and a clamping groove 332, the concave bracket 331 is welded to the back outer end of the side rail 31, a limiting spring 333 is fixedly connected inside the concave bracket 331, a clamping block 334 is fixedly connected to the end of the limiting spring 333, the clamping groove 332 is opened on the back upper end of the side rail 31 and the back upper end of the sliding plate 32, the end of the clamping block 334 is inserted into the clamping groove 332 inside the sliding plate 32 through the clamping groove 332 on the side rail 31, the overall cross-sectional shape of the inner wall of the side rail 31 and the overall cross-sectional shape of the sliding plate 32 are both set as a convex character shape, a wear-resistant gasket is fixedly connected to the outer side of the sliding plate 32, the side rails 31 are welded to the upper and lower ends of the concave seat 4 on both sides to provide a sliding track for the sliding plate 32, the inner side of the sliding plate 32 is welded with the two sides of the filter screen 51 to realize the connection of the filter screen 51 and the side rails 31, the limiting assembly 33 on the rear upper end of one side rail 31 is clamped with the sliding plate 32 to ensure the stability of the sliding plate 32 in the side rail 31, the outer surfaces of the concave seat 4, the sliding plate 32 and the side rails 31 are arc-shaped at the corners to reduce safety hazards, the concave bracket 331 in the limiting assembly 33 fixes the limiting spring 333 and the clamping block 334, the limiting of the sliding plate 32 is realized by the cooperation of the clamping block 334 and the clamping groove 332, the cross-sectional shape of the side rail 31 and the sliding plate 32 is a convex character shape to ensure the stable sliding of the sliding plate 32 in the side rail 31, and the wear-resistant gasket on the outer side of the sliding plate 32 reduces the wear of the sliding plate 32 and the side rails 31.

[0028] With reference to Figure 5The outer side of the clamping block 334 is welded with a connecting shaft 335, the outer end of the connecting shaft 335 is fixedly connected with a pull ring 336 which penetrates through the concave frame 331, the bottom of the sliding plate 32 is welded with a guide hopper 337 which is installed at the lower end of the filter screen 51, the output end of the guide hopper 337 is fixedly connected with a discharge conduit 338, the discharge conduit 338 located at the upper end is obliquely arranged towards the rear side, the discharge conduit 338 located at the lower end is obliquely arranged towards the front side, the connecting shaft 335 welded on the outer side of the clamping block 334 and the pull ring 336 at the outer end of the connecting shaft 335 provide a convenient operation mode for the operator, when it is necessary to install or disassemble the filter screen 51, the connecting shaft 335 is driven by pulling the pull ring 336, and then the movement of the clamping block 334 is controlled, so that the operation is more simple and efficient, the guide hopper 337 welded at the bottom of the sliding plate 32 can effectively collect the materials filtered from the filter screen 51 and guide them to the discharge conduit 338, the connection between the guide hopper 337 and the sliding plate 32 is firm, ensuring that there will be no loosening or falling off during use, the arrangement of the discharge conduit 338 enables the filtered materials to be smoothly discharged from the device, the discharge conduit 338 located at the upper end is obliquely arranged towards the rear side, and the discharge conduit 338 located at the lower end is obliquely arranged towards the front side, this design can reasonably plan the flow direction of the materials, avoiding the materials from being blocked or disordered during discharge, improving the discharge efficiency of the device and the overall stability of the operation, at the same time, the obliquely arranged discharge conduit 338 also helps to save space, making the layout of the device more compact and reasonable.

[0029] Reference Figures 1-3 The collecting mechanism 2 includes a sliding groove 21 which is opened in the inner bottom of the concave seat 4, the inner side of the sliding groove 21 is slidably connected with a sliding strip 22, the sliding strip 22 is slidably connected in the inner part of the sliding groove 21, the top of the sliding strip 22 is welded with a collecting frame 23, the overall cross-sectional shape of the sliding strip 22 and the inner part of the sliding groove 21 are both designed as a convex shape, the sliding groove 21 opened in the inner bottom of the concave seat 4 provides a stable sliding track for the sliding strip 22, the collecting frame 23 welded on the top of the sliding strip 22 can conveniently collect the sodium heparin materials filtered by the filtering mechanism 5, the overall cross-sectional shape of the sliding strip 22 and the sliding groove 21 are both designed as a convex shape, this design makes the sliding of the sliding strip 22 in the sliding groove 21 more stable and not easy to shake or separate, ensuring that the collecting frame 23 can accurately receive the materials discharged from the filtering mechanism 5, at the same time, this structure also facilitates the installation and disassembly of the collecting frame 23, when it is necessary to clean the materials in the collecting frame 23 or maintain the collecting frame 23, it can be easily slid out of the sliding groove 21, improving the use convenience and maintainability of the device.

[0030] Principle and advantages: By setting the filter mechanism 5, the device can add materials to the uppermost filter screen 51 during actual use. At this time, the driving motor 53 drives the rotating disc 541 to rotate, which in turn drives the frame 542 to rotate, and the frame 542 drives the conveying blade 543 to rotate inside the filter screen 51. With the rotation of the spiral conveying blade 543, it can assist in conveying the heparin sodium material inside the filter screen 51, and also stir the material. In this process, the heparin sodium material is continuously stirred while being conveyed, so that the heparin sodium material inside the filter screen 51 can be quickly screened and filtered. During the screening and filtering process, the material filtered and screened by the upper filter screen 51 can enter the filter screen 51 at the bottom for further filtering. The filtered material can enter the inside of the collection assembly with the aid of the guide hopper 337 and the discharge conduit 338. At the same time, the filter screen 51 is inclined as a whole, and the material can be more smoothly guided out with the aid of the guide hopper 337 and the discharge conduit 338 under the stirring drive of the stirring assembly 54. It can be seen that the device as a whole can realize rapid discharge and guide out, so that the filter screen 51 does not need to be cleaned frequently, and the filtered heparin sodium material can be automatically discharged, thereby realizing long-term continuous and uninterrupted screening processing, greatly improving the filtering efficiency of the device as a whole.

[0031] By setting the mounting mechanism 3, the device can insert the sliding plate 32 into the inside of the side rail 31 during use. During this period, pulling the pull ring 336 drives the clamping block 334 to move outward. After the clamping block 334 moves outward, the sliding plate 32 can be inserted into the inside of the side rail 31. When the sliding plate 32 is inserted into the inside of the side rail 31, release the pull ring 336, and the limit spring 333 resets to push the clamping block 334 into the clamping groove 332. The clamping block 334 and the clamping groove 332 are limited and mutually clamped to assist in clamping and installing the sliding plate 32 inside the side rail 31. By clamping the clamping block 334 and the sliding plate 32, the sliding plate 32 can be firmly clamped and installed inside the side rail 31, thereby assisting in clamping and installing the filter screen 51. When disassembling is needed, only the pull ring 336 is pulled to drive the connecting shaft 335 to move the clamping block 334 out of the clamping groove 332. After the clamping block 334 and the clamping groove 332 are separated, the sliding plate 32 can be pulled out from the inside of the side rail 31. This design makes the device as a whole convenient to quickly disassemble and assemble the filter screen 51, and can further improve the convenience of subsequent maintenance and cleaning of the device, greatly reducing the time required for maintenance and repair, so that the device can be quickly put into use again, and the efficiency of heparin sodium material screening processing can be significantly improved.

Claims

1. A raw material screening device for processing sodium heparin, comprising a substrate (1), characterized in that: A concave seat (4) is fixedly installed on the top of the substrate (1). Two sets of mounting mechanisms (3) are provided inside the concave seat (4). Two sets of filtering mechanisms (5) are installed on the inner side of the concave seat (4) through the mounting mechanisms (3). The filtering mechanisms (5) are inclinedly arranged inside the concave seat (4). A collection mechanism (2) is provided at the bottom of the concave seat (4). The filtering mechanism (5) includes a filter screen (51), which is installed on the inner side of the concave seat (4) by the mounting mechanism (3). A circular plate (52) is welded to the upper end of the filter screen (51). A drive motor (53) is installed on the outer middle of the circular plate (52) by bolts. An agitation component (54) is welded through the circular plate (52) at the output end of the drive motor (53). The agitation component (54) is movably installed on the inner side of the filter screen (51). The outer side of the agitation component (54) is in close contact with the inner wall of the filter screen (51).

2. The raw material screening device for processing heparin sodium according to claim 1, characterized in that: The agitation assembly (54) includes a turntable (541) which is rotatably connected to the side of the circular plate (52) near the filter screen (51). A frame (542) is welded to the side of the turntable (541) near the filter screen (51). A conveyor blade (543) is welded to the outside of the frame (542). The side of the turntable (541) away from the filter screen (51) is connected to the output end of the drive motor (53).

3. The raw material screening device for processing heparin sodium according to claim 2, characterized in that: The filter screen (51) has an overall arc-shaped cross-section, and the outer surface of the conveyor blade (543) is attached to the inner wall of the filter screen (51).

4. The raw material screening device for processing heparin sodium according to claim 1, characterized in that: The installation mechanism (3) includes a side rail (31), which is welded to the upper and lower ends of the front and rear sides inside the concave seat (4). A sliding plate (32) is slidably connected inside the side rail (31). The inner side of the sliding plate (32) is welded to both sides of the filter screen (51). A limiting component (33) is installed on the upper rear side of one side rail (31), and the limiting component (33) and the sliding plate (32) are engaged.

5. The raw material screening device for processing heparin sodium according to claim 4, characterized in that: The limiting component (33) includes a concave frame (331) and a slot (332). The concave frame (331) is welded to the outer back of the side rail (31). A limiting spring (333) is fixedly connected inside the concave frame (331). A locking block (334) is fixedly connected to the end of the limiting spring (333). The slot (332) is opened on the upper back of the side rail (31) and the upper back of the slide plate (32). The end of the locking block (334) passes through the slot (332) on the side rail (31) and is inserted into the slot (332) of the slide plate (32).

6. The raw material screening device for processing heparin sodium according to claim 5, characterized in that: A connecting shaft (335) is welded to the outside of the card block (334). The outer end of the connecting shaft (335) passes through the concave frame (331) and is fixedly connected to a pull ring (336). The bottom of the slide plate (32) is located at the lower end of the filter screen (51) and is welded to a guide bucket (337). The output end of the guide bucket (337) is fixedly connected to a discharge conduit (338).

7. The raw material screening device for processing heparin sodium according to claim 1, characterized in that: The collecting mechanism (2) includes a chute (21), which is opened on the front and rear sides of the bottom of the concave seat (4). A slide bar (22) is slidably connected to the inner side of the chute (21). The slide bar (22) is slidably connected to the inside of the chute (21). A collecting frame (23) is welded to the top of the slide bar (22).

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