Corrosion resistant analysis pump

Abstract

The utility model relates to the technical field of analysis pumps, in particular to a corrosion-resistant analysis pump which mainly comprises a driving gear shaft located in a gear metering pump and a gear shaft core portion located in the middle of the driving gear shaft and used for being connected with an external driving device to drive the driving gear shaft to rotate. The gear shaft core part comprises a fixing block, a connecting column is fixedly installed on one side of the fixing block, two sets of symmetrical outer clamping blocks are fixedly installed on the surface of the connecting column, the gear shaft outer part and the gear shaft outer part are located on the outer surface of the driving gear shaft, the gear shaft core part is wrapped, and the gear shaft core part and the gear shaft core part form a complete driving gear shaft. Two sets of symmetrical inner clamping blocks are arranged outside the gear shaft, the two ends of each inner clamping block are movably attached to the two ends of each outer clamping block, and when the two sets of outer clamping blocks and the two sets of inner clamping blocks are located on the same vertical plane, the outer portion of the gear shaft and the gear shaft core portion are combined to form a driving gear shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical pumps, in particular to a corrosion-resistant analytical pump. Background Art

[0002] In chemical laboratories, analytical pumps are often used to accurately transport liquids, especially chemical reagents or samples that require precise measurement. Gear metering pumps are a type of analytical pump that can provide very precise flow control.

[0003] Existing gear metering pumps generally use alloy stainless steel or polymer plastic as the material for manufacturing gear shafts when metering and transporting highly acidic corrosive liquids such as sulfuric acid, hydrochloric acid, and benzenesulfonic acid. In the publication number CN202883360U, titled "A Corrosion-Resistant Gear Metering Pump", the core of the gear shaft uses ordinary carbon steel as the skeleton, and the outside of the skeleton is covered with a 2 mm thick layer of polymer plastic, which has good wear resistance and corrosion resistance.

[0004] However, in actual use, the gear shaft not only has to withstand the erosion of chemical media, but also has to withstand long-term continuous operation and possible external force impact. Under continuous operation and complex working conditions, especially in corrosive environments, material fatigue, corrosion fatigue and possible external force effects may cause tiny cracks in the core of the gear shaft and eventually cause it to break. Once the gear shaft breaks, even if the remaining parts are still in good condition, it usually needs to be replaced as a whole. This overall replacement approach undoubtedly increases maintenance costs and material costs. Utility Model Content

[0005] The purpose of the present utility model is to provide a corrosion-resistant analytical pump to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] Corrosion-resistant analytical pumps, including:

[0008] Analyze the pump body;

[0009] The driving gear shaft is located inside the analytical pump body. When the driving gear shaft rotates, the analytical pump body is in a liquid conveying state.

[0010] The gear shaft core is located in the middle of the driving gear shaft and is used to connect an external drive device to drive the driving gear shaft to rotate. The gear shaft core includes a fixed block, a connecting column is fixedly installed on one side of the fixed block, and two groups of symmetrical external clamping blocks are fixedly installed on the surface of the connecting column. The number of external clamping blocks in each group is set to four, and the distance between two adjacent external clamping blocks is consistent;

[0011] The outside of the gear shaft is located on the outer surface of the driving gear shaft, wraps the core of the gear shaft and forms a complete driving gear shaft with the core of the gear shaft. The outside of the gear shaft includes two groups of symmetrical inner clamping blocks. The number of inner clamping blocks in each group is set to three. The two ends of the inner clamping blocks are movably fitted with the two ends of the outer clamping blocks. The distance between the two adjacent inner clamping blocks is consistent and the same as the height of the outer clamping blocks. When the two groups of outer clamping blocks and the two groups of inner clamping blocks are in the same vertical plane, the outside of the gear shaft and the core of the gear shaft are combined into a driving gear shaft.

[0012] Preferably, a threaded rod is rotatably connected inside the connecting column, three sets of screw sleeves are threadedly connected to the surface of the threaded rod, two symmetrical brackets are hinged on the surface of the screw sleeve, and a plurality of limiting grooves are opened on the inner wall outside the gear shaft, and the brackets are slidably connected inside the limiting grooves.

[0013] Preferably, a plurality of through grooves are provided on the surface of the connecting column, the bracket is rotatably connected inside the through groove, a rotating shaft is fixedly installed inside the through groove, the bracket is rotatably connected to the surface of the rotating shaft, a sliding groove is provided inside the connecting column, and the screw sleeve is slidably connected inside the sliding groove.

[0014] Preferably, a rotation groove is provided on the surface of the fixed block, a rotation block is fixedly mounted on one end of the threaded rod, the rotation block is rotatably connected inside the rotation groove, and a force application plate is fixedly mounted on the surface of the rotation block.

[0015] Preferably, an L-shaped rod is slidably connected to the inside of the force applying plate, a plurality of insertion holes are provided inside the rotating groove, and the L-shaped rod is movably inserted into the insertion holes.

[0016] Preferably, a positioning groove is provided inside the force plate, the L-shaped rod is slidably connected to the inside of the positioning groove, a positioning ring is slidably connected to the inside of the positioning groove, the positioning ring is fixedly installed on the surface of the L-shaped rod, a spring is fixedly installed on the surface of the positioning ring, the other end of the spring is fixedly connected to the inside of the positioning groove, a retreat groove is provided on the surface of the force plate, and the L-shaped rod is slidably connected to the inside of the retreat groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model is provided with a gear shaft core and a gear shaft outer portion, and the two are detachably assembled to form a driving gear shaft. When a small crack is detected on the surface of the gear shaft core portion, the rotating block is rotated to rotate the threaded rod, the screw sleeve moves downward, and the bracket is moved out from the inside of the limiting groove. When the fixed block is rotated, the outer clamping block is moved away from between two adjacent inner clamping blocks, so that the outer portion of the gear shaft cancels the limitation on the gear shaft core portion, thereby taking out the old gear shaft core portion as a whole and replacing it with a new gear shaft core portion, so that the remaining good part of the driving gear shaft can continue to be used, saving maintenance costs and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the active gear shaft structure of the utility model

[0021] Figure 3 This is a schematic diagram of the gear shaft core structure of the present utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the core portion of the gear shaft of the utility model;

[0023] Figure 5 This is a schematic diagram of the external structure of the gear shaft of the utility model;

[0024] Figure 6 This is an enlarged schematic diagram of the structure at point A of the present utility model.

[0025] In the picture:

[0026] 1. Driving gear shaft;

[0027] 2. Gear shaft core; 21. Fixed block; 22. Connecting column; 23. External clamping block; 24. Threaded rod; 25. Screw sleeve; 26. Bracket; 27. Through slot; 28. Rotating shaft; 29. ​​Sliding slot; 201. Rotating slot; 202. Rotating block; 203. Force plate; 204. L-shaped rod; 205. Jack; 206. Positioning slot; 207. Positioning ring; 208. Spring; 209. Relief slot;

[0028] 3. External part of the gear shaft; 31. Internal clamping block; 32. Limiting groove. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0031] like Figure 1-6 As shown, the present application provides a corrosion-resistant analytical pump, comprising:

[0032] Analyze the pump body 4;

[0033] The driving gear shaft 1 is located inside the analytical pump body 4. When the driving gear shaft 1 rotates, the analytical pump body 4 is in a liquid conveying state.

[0034] The gear shaft core 2 is located in the middle of the driving gear shaft 1 and is used to connect an external driving device to drive the driving gear shaft 1 to rotate. The gear shaft core 2 includes a fixed block 21. A connecting column 22 is fixedly installed on one side of the fixed block 21. Two groups of symmetrical external clamping blocks 23 are fixedly installed on the surface of the connecting column 22. The number of external clamping blocks 23 in each group is set to four, and the distance between two adjacent external clamping blocks 23 is consistent;

[0035] The outer portion 3 of the gear shaft is located on the outer surface of the driving gear shaft 1, wraps the gear shaft core 2 and forms a complete driving gear shaft 1 with the gear shaft core 2. The outer portion 3 of the gear shaft includes two groups of symmetrical inner clamping blocks 31. The number of inner clamping blocks 31 in each group is set to three. The two ends of the inner clamping blocks 31 are movably fitted with the two ends of the outer clamping blocks 23. The distance between the two adjacent inner clamping blocks 31 is consistent and the height is the same as the outer clamping blocks 23. When the two groups of outer clamping blocks 23 and the two groups of inner clamping blocks 31 are in the same vertical plane, the outer portion 3 of the gear shaft and the gear shaft core 2 are combined into the driving gear shaft 1;

[0036] In this embodiment: the gear shaft core 2 is made of carbon steel or alloy, and the gear shaft outer portion 3 is made of polymer plastic. When the gear shaft core 2 and the gear shaft outer portion 3 are installed, the fixing block 21 is rotated and the outer clamping block 23 moves to the middle of the two adjacent inner clamping blocks 31, thereby completing the preliminary limiting of the gear shaft core 2.

[0037] Specifically, such as Figure 4 As shown, a threaded rod 24 is rotatably connected to the interior of the connecting column 22, and three sets of screw sleeves 25 are threadedly connected to the surface of the threaded rod 24. Two symmetrical brackets 26 are hinged on the surface of the screw sleeve 25. The inner wall of the outer part of the gear shaft 3 is provided with a plurality of limiting grooves 32, and the brackets 26 are slidably connected to the inner part of the limiting grooves 32;

[0038] In this embodiment, the threaded rod 24 rotates, thereby moving the three sets of screw sleeves 25 upward, and the angle between the bracket 26 and the screw sleeve 25 becomes larger, so that the other end of the bracket 26 can be engaged in the limiting groove 32, thereby achieving the re-limitation of the gear shaft core 2.

[0039] Specifically, such as Figure 3 As shown, a plurality of through slots 27 are formed on the surface of the connecting column 22, and the bracket 26 is rotatably connected to the interior of the through slot 27. A rotating shaft 28 is fixedly installed inside the through slot 27, and the bracket 26 is rotatably connected to the surface of the rotating shaft 28. A sliding slot 29 is formed inside the connecting column 22, and the screw sleeve 25 is slidably connected to the interior of the sliding slot 29;

[0040] In this embodiment: the through groove 27 provides space for the rotation of the bracket 26. Through the setting of the rotating shaft 28, the bracket 26 can be adjusted in angle with the rotating shaft 28 as the center point, so that one end of the bracket 26 can be accurately engaged in the limiting groove 32, and the sliding groove 29 provides space for the screw sleeve 25 to slide up and down.

[0041] Specifically, such as Figure 6 As shown, a rotation groove 201 is opened on the surface of the fixed block 21, and a rotation block 202 is fixedly installed at one end of the threaded rod 24. The rotation block 202 is rotatably connected to the inside of the rotation groove 201, and a force plate 203 is fixedly installed on the surface of the rotation block 202;

[0042] In this embodiment, the force applying plate 203 is rotated, thereby causing the rotating block 202 to rotate inside the rotating groove 201 , thereby driving the threaded rod 24 to rotate.

[0043] Specifically, such as Figure 6 As shown, an L-shaped rod 204 is slidably connected to the inside of the force applying plate 203 , and a plurality of insertion holes 205 are opened inside the rotating groove 201 , and the L-shaped rod 204 is movably inserted into the inside of the insertion holes 205 .

[0044] In this embodiment: in order to prevent the threaded rod 24 from rotating after its position is determined, the L-shaped rod 204 and the socket 205 are matched to each other so that the threaded rod 24 can be fixed in position after rotation, so that the end of the bracket 26 can be stably inserted into the interior of the limiting groove 32.

[0045] Specifically, such as Figure 6 As shown, a positioning groove 206 is provided inside the force plate 203, and the L-shaped rod 204 is slidably connected to the inside of the positioning groove 206. A positioning ring 207 is slidably connected to the inside of the positioning groove 206. The positioning ring 207 is fixedly mounted on the surface of the L-shaped rod 204. A spring 208 is fixedly mounted on the surface of the positioning ring 207. The other end of the spring 208 is fixedly connected to the inside of the positioning groove 206. A retreat groove 209 is provided on the surface of the force plate 203, and the L-shaped rod 204 is slidably connected to the inside of the retreat groove 209.

[0046] In this embodiment: through the coordinated arrangement of the spring 208 and the positioning ring 207, when the L-shaped rod 204 is inserted into the interior of the socket 205, the spring 208 squeezes the positioning ring 207, so that the L-shaped rod 204 is inserted into the interior of the socket 205 more stably and will not be moved out by external force. The setting of the retreat groove 209 and the positioning groove 206 provides space for the backward movement of the L-shaped rod 204.

[0047] The specific solution is as follows: when a small crack is detected on the surface of the gear shaft core 2, the L-shaped rod 204 is first removed from the inside of the socket 205, and the rotating block 202 is rotated clockwise by the force plate 203, the threaded rod 24 rotates accordingly, the screw sleeve 25 moves down, and the bracket 26 is removed from the inside of the limiting groove 32, and the fixing block 21 is rotated clockwise to remove the outer clamping block 23 from between the two adjacent inner clamping blocks 31. The outer portion 3 of the gear shaft cancels the limit on the gear shaft core 2, thereby removing the old gear shaft core 2 as a whole, and replacing it with a new gear shaft core 2. , align it with the outside of the gear shaft 3 and insert it, rotate the fixing block 21 counterclockwise to move the outer clamping block 23 back to the middle of the two adjacent inner clamping blocks 31, and perform preliminary positioning of the gear shaft core 2. Then, rotate the rotating block 202 counterclockwise through the force plate 203, the threaded rod 24 rotates in the opposite direction, the screw sleeve 25 rises, and one end of the bracket 26 is re-engaged with the inside of the limiting groove 32 to complete the secondary positioning of the gear shaft core 2. To prevent the threaded rod 24 from rotating after the position is determined, the L-shaped rod 204 can be inserted into the corresponding socket 205 for use.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative; within the spirit of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0049] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A corrosion-resistant analytical pump, characterized in that: include: Analyze the pump body (4); A driving gear shaft (1), the driving gear shaft (1) is located inside the analytical pump body (4), and when the driving gear shaft (1) rotates, the analytical pump body (4) is in a liquid conveying state; The gear shaft core (2) is located at the middle position of the driving gear shaft (1) and is used to connect an external driving device to drive the driving gear shaft (1) to rotate. The gear shaft core (2) includes a fixed block (21). A connecting column (22) is fixedly installed on one side of the fixed block (21). Two groups of symmetrical external clamping blocks (23) are fixedly installed on the surface of the connecting column (22). The number of each group of external clamping blocks (23) is set to four, and the distance between two adjacent external clamping blocks (23) is consistent. The gear shaft outer portion (3) is located on the outer surface of the driving gear shaft (1), wraps the gear shaft core (2) and forms a complete driving gear shaft (1) with the gear shaft core (2). The gear shaft outer portion (3) includes two groups of symmetrical inner clamping blocks (31), and the number of the inner clamping blocks (31) in each group is set to three. The two ends of the inner clamping blocks (31) are movably fitted with the two ends of the outer clamping blocks (23). The distance between two adjacent inner clamping blocks (31) is consistent and the height is the same as that of the outer clamping blocks (23). When the two groups of outer clamping blocks (23) and the two groups of inner clamping blocks (31) are in the same vertical plane, the gear shaft outer portion (3) and the gear shaft core (2) are combined into the driving gear shaft (1).

2. The corrosion-resistant analytical pump according to claim 1, characterized in that The connecting column (22) is internally rotatably connected to a threaded rod (24), the surface of the threaded rod (24) is threadedly connected to three sets of screw sleeves (25), the surface of the screw sleeves (25) is hinged with two symmetrical brackets (26), the inner wall of the outer portion (3) of the gear shaft is provided with a plurality of limiting grooves (32), and the brackets (26) are slidably connected to the inside of the limiting grooves (32).

3. The corrosion-resistant analytical pump according to claim 2, characterized in that The surface of the connecting column (22) is provided with a plurality of through grooves (27), the bracket (26) is rotatably connected to the inside of the through groove (27), a rotating shaft (28) is fixedly installed inside the through groove (27), the bracket (26) is rotatably connected to the surface of the rotating shaft (28), the inside of the connecting column (22) is provided with a sliding groove (29), and the screw sleeve (25) is slidably connected to the inside of the sliding groove (29).

4. The corrosion-resistant analytical pump according to claim 2, characterized in that A rotation groove (201) is provided on the surface of the fixed block (21); a rotation block (202) is fixedly mounted on one end of the threaded rod (24); the rotation block (202) is rotatably connected inside the rotation groove (201); and a force application plate (203) is fixedly mounted on the surface of the rotation block (202).

5. The corrosion-resistant analytical pump according to claim 4, characterized in that An L-shaped rod (204) is slidably connected inside the force-applying plate (203), a plurality of insertion holes (205) are provided inside the rotation groove (201), and the L-shaped rod (204) is movably inserted inside the insertion holes (205).

6. The corrosion-resistant analytical pump according to claim 5, characterized in that A positioning groove (206) is provided inside the force-applying plate (203), the L-shaped rod (204) is slidably connected to the inside of the positioning groove (206), a positioning ring (207) is slidably connected to the inside of the positioning groove (206), the positioning ring (207) is fixedly mounted on the surface of the L-shaped rod (204), a spring (208) is fixedly mounted on the surface of the positioning ring (207), the other end of the spring (208) is fixedly connected to the inside of the positioning groove (206), a retreat groove (209) is provided on the surface of the force-applying plate (203), and the L-shaped rod (204) is slidably connected to the inside of the retreat groove (209).

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