Negative pressure weighing chamber convenient to operate
By providing a limit rod and a rotating rod at the bottom of the operating table of the negative pressure weighing chamber, the operating table can be stably fixed in the weighing chamber, which solves the problem that the operating table is difficult to stay stably and improves the convenience of cleaning.
Patent Information
- Application Number
- CN202420355273.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-02-27
AI Technical Summary
In the negative pressure weighing chamber, it is difficult for the operating table to stay stably in the same position, resulting in inconvenient weighing work.
A negative pressure weighing chamber is designed for easy operation. By setting a limiting rod, a rotating rod, a push rod, a center rod, a torsion spring, a connecting rod and several springs at the bottom of the operating table, the operating table can enter the weighing chamber under the guidance of the limiting rod, and fix the position of the universal wheel through the rotating rod.
It realizes the stable fixation of the operating table in the weighing room, solves the problem that the operating table is difficult to stay stably, and easily removes the limit lever during cleaning, making it convenient for comprehensive cleaning.
Smart Images
Figure CN222627416U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of weighing equipment, and in particular relates to a negative pressure weighing room which is convenient to operate. Background Art
[0002] Negative pressure weighing room, also known as negative pressure weighing hood, is a local purification equipment used in pharmaceutical, microbiological research and scientific experiments. It provides a vertical one-way airflow, so that part of the clean air circulates in the working area and part is discharged to the nearby area, thereby generating negative pressure in the working area, thereby controlling the overflow and rise of dust and reagents, and preventing the inhalation of dust and reagents to the human body.
[0003] When operating in a negative pressure weighing room, it is usually done on an operating table. After weighing, the operating table needs to be moved out and the inside of the weighing room needs to be cleaned. In order to ensure the smooth movement of the operating table, universal wheels are generally installed at the bottom of the operating table. Because the sockets and ventilation positions in the weighing room are fixed, in order to ensure the safety of weighing work, the position of the operating table is usually fixed. However, at present, the position of the operating table needs to be adjusted multiple times each time it is pushed into the weighing room, and it is difficult to stably fix the operating table at the specified position.
[0004] To this end, we proposed a convenient-to-operate negative pressure weighing chamber to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the problem in the prior art that an operating table is difficult to stably stay at the same position, and proposes a negative pressure weighing chamber which is convenient to operate.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A negative pressure weighing chamber that is easy to operate, comprises a weighing chamber body and an operating table, wherein the operating table is arranged inside the weighing chamber body, and four universal wheels are arranged at the bottom of the operating table, and the four universal wheels are arranged in a rectangular shape; two sockets are provided on the side wall of the weighing chamber body facing the operating table, and two limit rods are respectively inserted in the two sockets, and the cross section of the limit rod is "Y"-shaped; the two sides of the two universal wheels on the same side are respectively against the inner walls on both sides of the forked end of the limit rod, and a movement hole is provided on the side wall of the limit rod close to the other limit rod, and a pushing mechanism for connecting the two limit rods is arranged in the movement hole, and a working cavity is provided in the limit rod, and a limiting mechanism for controlling the limit rod is arranged in the working cavity.
[0008] Preferably, the pushing mechanism includes a pushing rod, two rotating rods and two center rods, the center rod is fixedly installed in the movement hole, the rotating rod is installed outside the center rod, the rotating rod is rotatably connected to the outer wall of the center rod, the two ends of the pushing rod are respectively rotatably connected to one end of the two rotating rods, the side wall of the rotating rod away from one end of the pushing rod is abutted against the side wall of the universal wheel, and a limiting hole is opened on the side wall of the rotating rod close to one end of the pushing rod.
[0009] Preferably, a torsion spring is disposed on the outer sleeve of the center rod, one end of the torsion spring is fixedly connected to the bottom wall of the movement hole, and the other end of the torsion spring is fixedly connected to the inner wall of the rotating rod.
[0010] Preferably, the limiting mechanism includes a block, a connecting rod and a plurality of springs, the connecting rod is slidably connected to the bottom wall of the working chamber, the connecting rod has a "U"-shaped cross-section, both ends of the connecting rod pass through the side walls of the working chamber, the block is fixedly connected to the top wall of one end of the connecting rod, the side wall of the block is abutted against the side wall of the universal wheel, the other end of the connecting rod is inserted into the limiting hole, and the plurality of springs are respectively fixedly connected between the side wall of the connecting rod and the side wall of the working chamber.
[0011] Preferably, a rubber block is fixedly connected to the middle position of the push rod, and the outer diameter of the rubber block is larger than the outer diameter of the push rod.
[0012] Preferably, the sum of the heights of the rotating rod and the pushing rod is smaller than the height of the movement hole, and the rotating rod is designed to be arc-shaped at one end close to the pushing rod.
[0013] In summary, the technical effects and advantages of the utility model are as follows:
[0014] By arranging a limit rod, a rotating rod, a pushing rod, a center rod, a torsion spring, a connecting rod and a plurality of springs at the bottom of the operating table in the weighing room, the operating table can enter the weighing room under the guidance of the limit rod, and the position of the universal wheel can be fixed by the rotating rod, thereby solving the problem in the prior art that the operating table is difficult to stay stably in the same position, and when it is necessary to clean the inside of the weighing room, the limit rod can be easily removed from the socket, which makes it more convenient to thoroughly clean the inside of the weighing room. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the structural connection of the driving mechanism in the utility model;
[0017] Figure 3 It is a partial structural schematic diagram of the torsion spring and the center rod in the utility model;
[0018] Figure 4It is a schematic diagram of the structural connection of the limiting mechanism in the utility model.
[0019] In the figure: 1. Weighing chamber body; 2. Operating table; 3. Universal wheel; 4. Limit rod; 5. Movement hole; 6. Push rod; 7. Rotating rod; 8. Center rod; 9. Limiting hole; 10. Torsion spring; 11. Stop block; 12. Connecting rod; 13. Spring; 14. Rubber block. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0021] like Figure 1 As shown, a conveniently operated negative pressure weighing chamber comprises a weighing chamber body 1 and an operating table 2. The operating table 2 is arranged inside the weighing chamber body 1. Four universal wheels 3 are arranged at the bottom of the operating table 2. The four universal wheels 3 are arranged in a rectangular shape. Two plug holes are provided on the side wall of the weighing chamber body 1 facing the operating table 2. Two limit rods 4 are respectively inserted into the two plug holes. The cross section of the limit rod 4 is "Y" shaped. The two sides of the two universal wheels 3 on the same side are respectively against the inner walls of the forked end of the limit rod. The side wall of the limit rod 4 close to the other limit rod 4 is provided with a movement hole 5. The universal wheel 3 can be just stuck into the limit rod 4.
[0022] Reference Figure 2 A pushing mechanism for connecting two limit rods 4 is installed in the movement hole 5, and the pushing mechanism includes a pushing rod 6, two rotating rods 7 and two center rods 8. The center rod 8 is fixedly installed in the movement hole 5. A rubber block 14 is fixedly connected to the middle position of the pushing rod 6. The outer diameter of the rubber block 14 is larger than the outer diameter of the pushing rod 6. The rubber block 14 does not contact the bottom surface. The setting of the rubber block 14 can protect the pushing rod 6. The sum of the heights of the rotating rod 7 and the pushing rod 6 is less than the height of the movement hole 5. The rotating rod 7 is designed to be arc-shaped at one end close to the pushing rod 6.
[0023] Reference Figure 3 The rotating rod 7 is arranged outside the center rod 8, and the rotating rod 7 is rotatably connected to the outer wall of the center rod 8. A torsion spring 10 is arranged on the outer sleeve of the center rod 8. The force applied to the rotating rod 7 by the torsion spring 10 will cause the rotating rod 7 to rotate toward the direction of the universal wheel 3. One end of the torsion spring 10 is fixedly connected to the bottom wall of the movement hole 5, and the other end is fixedly connected to the inner wall of the rotating rod 7.
[0024] The two ends of the push rod 6 are rotatably connected to one end of the two rotating rods 7 respectively, and the side wall of the rotating rod 7 away from the push rod 6 is against the side wall of the universal wheel 3. A limiting hole 9 is opened on the side wall of the rotating rod 7 close to the push rod 6, and the size of the limiting hole 9 is consistent with the size of the end of the connecting rod 12 inserted into the limiting hole 9 below.
[0025] Reference Figure 4 A working chamber is provided in the limit rod 4, and a limiting mechanism for controlling the limit rod 4 is installed in the working chamber. The limiting mechanism includes a stopper 11, a connecting rod 12, and a plurality of springs 13. The connecting rod 12 is slidably connected to the bottom wall of the working chamber. The cross section of the connecting rod 12 is "U"-shaped. Both ends of the connecting rod 12 pass through the side wall of the working chamber. The stopper 11 is fixedly connected to the top wall of one end of the connecting rod 12. The side wall of the stopper 11 abuts against the side wall of the universal wheel 3. The stopper 11 makes it easier for the connecting rod 12 to be pushed into the working chamber by the universal wheel 3. The other end of the connecting rod 12 is inserted into the limiting hole 9, and a plurality of springs 13 are respectively fixedly connected between the side wall of the connecting rod 12 and the side wall of the working chamber.
[0026] The working principle is as follows: first, the limit rod 4 can be inserted into the socket, and then the universal wheel 3 at the bottom of the operating table 2 can be pushed into the weighing chamber body 1 along the limit rod 4. When the universal wheel 3 at the front hits the block 11, the staff pushes the operating table 2 forward, so that the block 11 can drive the connecting rod 12 to move toward the inside of the working chamber. While compressing the spring 13, the connecting rod 12 will retract into the working chamber. The connecting rod 12 originally inserted into the limiting hole 9 will retract, which will cause the rotating rod 7 to rotate under the drive of the torsion spring 10, so that the rotating rod 7 rotates to the position against the universal wheel 3, so that the operating table 2 can be fixed to the current position, which makes it more convenient for the staff to perform weighing work on the operating table 2 stably.
[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A conveniently operated negative pressure weighing chamber, comprising a weighing chamber body (1) and an operating table (2), wherein the operating table (2) is arranged inside the weighing chamber body (1), and four universal wheels (3) are arranged at the bottom of the operating table (2), wherein the four universal wheels (3) are arranged in a rectangular shape, and wherein: The weighing chamber body (1) has two insertion holes on the side wall facing the operating table (2), and two limit rods (4) are respectively inserted into the two insertion holes. The cross section of the limit rod (4) is "Y"-shaped. The two sides of the two universal wheels (3) located on the same side are respectively against the inner walls of the forked ends of the limit rods. The side wall of the limit rod (4) close to the other limit rod (4) has a movement hole (5). A pushing mechanism for connecting the two limit rods (4) is installed in the movement hole (5). The limit rod (4) has a working cavity, and a limiting mechanism for controlling the limit rod (4) is installed in the working cavity.
2. A conveniently operated negative pressure weighing chamber according to claim 1, characterized in that: The pushing mechanism comprises a pushing rod (6), two rotating rods (7) and two center rods (8); the center rod (8) is fixedly mounted in the movement hole (5); the rotating rod (7) is mounted outside the center rod (8); the rotating rod (7) is rotatably connected to the outer wall of the center rod (8); two ends of the pushing rod (6) are rotatably connected to one end of the two rotating rods (7); a side wall of an end of the rotating rod (7) away from the pushing rod (6) abuts against a side wall of the universal wheel (3); and a side wall of an end of the rotating rod (7) close to the pushing rod (6) is provided with a limiting hole (9).
3. A conveniently operated negative pressure weighing chamber according to claim 2, characterized in that: The outer sleeve of the central rod (8) is provided with a torsion spring (10), one end of the torsion spring (10) is fixedly connected to the bottom wall of the movement hole (5), and the other end of the torsion spring (10) is fixedly connected to the inner wall of the rotating rod (7).
4. A conveniently operated negative pressure weighing chamber according to claim 2, characterized in that: The limiting mechanism comprises a stopper (11), a connecting rod (12), and a plurality of springs (13); the connecting rod (12) is slidably connected to the bottom wall of the working chamber; the connecting rod (12) has a U-shaped cross section; both ends of the connecting rod (12) pass through the side walls of the working chamber; the stopper (11) is fixedly connected to the top wall of one end of the connecting rod (12); the side wall of the stopper (11) abuts against the side wall of the universal wheel (3); the other end of the connecting rod (12) is inserted into the limiting hole (9); and the plurality of springs (13) are respectively fixedly connected between the side wall of the connecting rod (12) and the side wall of the working chamber.
5. A conveniently operated negative pressure weighing chamber according to claim 2, characterized in that: A rubber block (14) is fixedly connected to the middle position of the push rod (6), and the outer diameter of the rubber block (14) is greater than the outer diameter of the push rod (6).
6. A conveniently operated negative pressure weighing chamber according to claim 2, characterized in that: The sum of the heights of the rotating rod (7) and the pushing rod (6) is less than the height of the movement hole (5), and the end of the rotating rod (7) close to the pushing rod (6) is designed to be arc-shaped.