Adjusting type centering shaft injection pump

Abstract

The utility model discloses a regulating type centering shaft injection pump, which belongs to the field of fluid transportation and comprises a flow direction regulating mechanism, an injection part driving mechanism and an injection tube, and the flow direction regulating mechanism and the injection part driving mechanism are both arranged in a shell; the flow direction adjusting mechanism comprises a first motor and an adjusting valve, a centering shaft is arranged between an output shaft of the first motor and the adjusting valve and comprises a left shaft and a right shaft, a sleeve groove and a ball are arranged on the sides, close to each other, of the left shaft and the right shaft respectively, and a radial shaft is arranged in the sleeve groove in the radial direction. By means of the mode that the left shaft and the right shaft are movably connected, the right shaft can be subjected to front-back and left-right small-amplitude angle adjustment relative to the left shaft, meanwhile, simultaneous rotation of the left shaft and the right shaft is not affected, and the situation that the centering shaft cannot change the axis angle, so that the centering shaft cannot change the axis angle is avoided. Therefore, the problem that the centering shaft and the fixed valve head are misplaced during installation is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid transportation, and particularly relates to an adjustable centering shaft injection pump. Background Art

[0002] An injection pump is a medical device composed of a stepper motor and its driver, a lead screw, and a bracket, etc., also known as a lead screw pump. By correctly installing a syringe and an infusion tube and placing the liquid medicine in the syringe, the injection pump can be connected to the piston of the syringe through a nut to achieve precise delivery of the liquid medicine.

[0003] During the review process of the injection pump, there will inevitably be a slight inclination on the mating surface of the fixed valve head and the rotating valve head. In order to make the rotating valve head and the fixed valve head fit better, the rotating valve head will be inclined to fit the rotating valve head, resulting in a deviation between the center of the rotating valve head and the axis of the centering shaft. Since the centering shaft cannot change the axis angle or position, misalignment occurs when the centering shaft is installed with the fixed valve head. In the light case, the fitting degree between the fixed valve head and the rotating valve head will be reduced, and in the heavy case, it cannot be installed. Content of the Utility Model

[0004] The purpose of the utility model is to provide an adjustable centering shaft injection pump to solve the problem that there is an included angle between the center of the rotating valve head and the axis of the centering shaft.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an adjustable centering shaft injection pump, including a flow direction adjusting mechanism, an injection part driving mechanism, and an injection tube. Both the flow direction adjusting mechanism and the injection part driving mechanism are arranged in a housing;

[0006] The flow direction adjusting mechanism includes a first motor and a regulating valve. A centering shaft is arranged between the output shaft of the first motor and the regulating valve. The centering shaft includes a left shaft and a right shaft. A socket groove and a sphere are respectively arranged on the sides of the left shaft and the right shaft close to each other. A radial shaft is arranged radially inside the socket groove. The right shaft is arranged in the socket groove through the sphere, and the sphere is sleeved on the radial shaft. An elastic member is arranged between the left shaft and the right shaft;

[0007] Both sides of the inner cavity of the socket groove are provided with limiting through grooves. The two ends of the radial shaft are respectively arranged in the two limiting through grooves, and the two ends of the radial shaft swing in the limiting through grooves.

[0008] Further, a connecting member is arranged on the output shaft of the first motor. A first connecting protrusion and a second connecting protrusion are respectively arranged on the sides of the connecting member and the centering shaft close to each other. The first connecting protrusion and the second connecting protrusion are complementary.

[0009] Further, the first connecting protrusion and the second connecting protrusion are jointly arranged in a bearing.

[0010] Further, the regulating valve includes a rotary valve head and a fixed valve head, and the rotary valve head is mounted on the right shaft.

[0011] Further, a communication groove is formed in the rotary valve head, a plurality of flow grooves and a transition groove are formed in the fixed valve head, and one end of the communication groove located at the center of the circle is communicated with the injection pipe through the transition groove.

[0012] Further, the end of the communication groove away from the center of the circle can be communicated with any one of the flow grooves.

[0013] Further, the injection part driving mechanism includes a threaded rod, a limiting rod and a moving part. The moving part is sleeved on the threaded rod in a threaded manner, and the moving part is movably sleeved on the limiting rod.

[0014] Further, the injection part driving mechanism further includes a second motor and a transmission part, and the output shaft of the second motor is in transmission connection with the threaded rod through the transmission part.

[0015] Further, the second motor, the threaded rod and the limiting rod are arranged side by side vertically below the first motor.

[0016] Further, one side of the moving part is connected to the piston rod of the injection pipe.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] For this adjustable centering shaft injection pump, through the movable connection mode of the left shaft and the right shaft, the right shaft can perform small-angle adjustment in the front, back, left and right directions relative to the left shaft, and at the same time, it does not affect the simultaneous rotation of the left shaft and the right shaft, avoiding the problem that the centering shaft cannot change the axis angle, resulting in a slight misalignment when the centering shaft is installed with the fixed valve head;

[0019] For this adjustable centering shaft injection pump, by arranging the second motor, the threaded rod and the limiting rod side by side vertically below the first motor and driving by the transmission part, the volume of the adjustable centering shaft injection pump can be effectively reduced. Description of the Drawings

[0020] Figure 1 is a three-dimensional view of the adjustable centering shaft injection pump;

[0021] Figure 2 is Figure 1 a schematic diagram of removing a partial housing;

[0022] Figure 3 is Figure 1 a schematic diagram of removing the housing;

[0023] Figure 4 is Figure 2 a sectional view along line A-A in

[0024] Figure 5 For Figure 3 Schematic diagram after rotating 90 degrees after sectional view along line B-B in the figure;

[0025] Figure 6 Sectional view of the centering shaft;

[0026] Figure 7 Schematic diagram of the rotary valve head.

[0027] In the figure: 10, flow direction adjustment mechanism; 110, first motor; 120, regulating valve; 121, rotary valve head; 1211, communication groove; 122, fixed valve head; 1221, first flow groove; 1222, second flow groove; 1223, transition groove; 130, connecting piece; 1301, first connecting protrusion; 140, centering shaft; 1410, limiting through groove; 1401, second connecting protrusion; 141, left shaft; 1411, sleeve groove; 1412, radial shaft; 142, right shaft; 1421, sphere; 143, elastic member; 20, injection part driving mechanism; 210, second motor; 220, transmission member; 230, threaded rod; 240, limiting rod; 250, moving member; 30, housing; 40, injection tube; 410, piston rod. Specific embodiments

[0028] The following further describes the present utility model in conjunction with embodiments.

[0029] The following embodiments are used to illustrate the present utility model, but cannot be used to limit the protection scope of the present utility model. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement of the method of the present utility model under the premise of the concept of the present utility model belongs to the scope of protection required by the present utility model.

[0030] Please refer to Figure 1 , the present utility model provides an adjustable centering shaft injection pump, including a flow direction adjustment mechanism 10 and an injection part driving mechanism 20, and both the flow direction adjustment mechanism 10 and the injection part driving mechanism 20 are arranged in a housing 30;

[0031] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , the flow direction adjustment mechanism 10 includes a first motor 110 and a regulating valve 120. A connecting piece 130 is installed on the output shaft of the first motor 110. When the output shaft of the first motor 110 rotates, the connecting piece 130 can rotate with the output shaft of the first motor 110.

[0032] Please refer to Figure 4 and Figure 5, a centering shaft 140 is provided between the connecting member 130 and the regulating valve 120. On the sides of the connecting member 130 and the centering shaft 140 close to each other, a first connecting protrusion 1301 and a second connecting protrusion 1401 are respectively provided. The first connecting protrusion 1301 and the second connecting protrusion 1401 are complementary to each other and can be spliced into a cylindrical shape. The first connecting protrusion 1301 and the second connecting protrusion 1401 can be semi-cylindrical. The first connecting protrusion 1301 and the second connecting protrusion 1401 are jointly arranged inside the bearing.

[0033] Please refer to Figure 4 , Figure 5 and Figure 6 , the centering shaft 140 includes a left shaft 141 and a right shaft 142. On the sides of the left shaft 141 and the right shaft 142 close to each other, a socket groove 1411 and a sphere 1421 are respectively provided. A radial shaft 1412 is radially arranged inside the socket groove 1411. The right shaft 142 is arranged in the socket groove 1411 through the sphere 1421, and the sphere 1421 is sleeved on the radial shaft 1412. An elastic member 143 is provided between the left shaft 141 and the right shaft 142. The main function of the elastic member 143 is to keep the right shaft 142 centered.

[0034] Please refer to Figure 6 , both sides of the inner cavity of the socket groove 1411 are provided with limiting through grooves 1410. The two ends of the radial shaft 1412 are respectively arranged in the two limiting through grooves 1410. The two ends of the radial shaft 1412 can swing slightly left and right in the limiting through grooves 1410, so that the right shaft 142 can be adjusted by a small angle in the front, back, left, and right directions relative to the left shaft 141.

[0035] Please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , the regulating valve 120 includes a rotary valve head 121 and a fixed valve head 122. The rotary valve head 121 is installed on the right shaft 142 and can rotate together with the centering shaft 140. The rotary valve head 121 and the fixed valve head 122 are in close contact. A communication groove 1211 is opened on the rotary valve head 121. A first flow-through groove 1221, a second flow-through groove 1222, and a transition groove 1223 are opened on the fixed valve head 122; one end of the communication groove 1211 located at the center is communicated with the injection pipe 40 through the transition groove 1223. By rotating the rotary valve head 121, different flow-through grooves are communicated with the end of the communication groove 1211 far from the center, and at the same time, the liquid is extracted and discharged through the injection pipe 40 to realize the flow of the liquid.

[0036] The rotary valve head 121 is installed on the right side of the right shaft 142, and the rotary valve head 121 is driven to rotate by the centering shaft 140.

[0037] Please refer to Figures 2 - 4, the injection part driving mechanism 20 includes a second motor 210, a transmission part 220, a threaded rod 230, a limiting rod 240 and a moving part 250. The second motor 210, the threaded rod 230 and the limiting rod 240 are vertically arranged side by side below the first motor 110. The output shaft of the second motor 210 is in transmission connection with the threaded rod 230 through the transmission part 220. The moving part 250 is threadedly sleeved on the threaded rod 230 and is movably sleeved on the limiting rod 240 at the same time. By arranging vertically side by side and driving with the transmission part 220, the volume of the device can be effectively reduced.

[0038] Please refer to Figures 2 - 4 , one side of the moving part 250 is connected to the piston rod 410 of the injection tube 40. When the moving part 250 moves downward, the moving part 250 pulls the piston rod 410, and at this time, negative pressure is generated inside the injection tube 40, and the liquid flows into the injection tube 40. When the moving part 250 moves upward, the liquid is pushed out of the injection tube 40 by the piston rod 410, thereby realizing liquid transportation.

[0039] The working principle and usage process of the present utility model: Connect the first flow channel 1221 and the second flow channel 1222 to the water inlet pipeline and the water outlet pipeline respectively. At this time, the communication channel 1211 in the rotary valve head 121 connects the first flow channel 1221 with the transition channel 1223. Drive the second motor 210, and the second motor 210 drives the threaded rod 230 to rotate through the transmission part 220. The moving part 250 moves downward under the rotation of the threaded rod 230 and the limitation of the limiting rod 240. The moving block 250 moves downward and pulls the piston rod 410 downward, so that the liquid in the water inlet pipeline enters the injection tube 40. Drive the first motor 110, and the first motor 110 drives the rotary valve head 121 to rotate through the centering shaft 140. The communication channel 1211 connects the second flow channel 1222 with the transition channel 1223. The moving part 250 moves upward under the drive of the second motor 210. The moving part 250 pushes the piston rod 410 upward, and the piston rod 410 pushes the water inside the injection tube 40 out through the second flow channel 1222 to complete liquid transportation.

[0040] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable centering shaft injection pump, characterized in that: It comprises a flow direction regulating mechanism (10), an injection piece driving mechanism (20) and an injection tube (40), wherein the flow direction regulating mechanism (10) and the injection piece driving mechanism (20) are both arranged in a housing (30); The flow direction regulating mechanism (10) comprises a first motor (110) and a regulating valve (120); a centering shaft (140) is arranged between the output shaft of the first motor (110) and the regulating valve (120); the centering shaft (140) comprises a left shaft (141) and a right shaft (142); a sleeve groove (1411) and a sphere (1421) are respectively arranged on the sides of the left shaft (141) and the right shaft (142) close to each other; a radial shaft (1412) is arranged radially inside the sleeve groove (1411); the right shaft (142) is arranged in the sleeve groove (1411) through the sphere (1421), and the sphere (1421) is sleeved on the radial shaft (1412); and an elastic member (143) is arranged between the left shaft (141) and the right shaft (142); Limiting through grooves (1410) are provided on both sides of the inner cavity of the sleeve groove (1411), and the two ends of the radial shaft (1412) are respectively arranged in the two limiting through grooves (1410), and the two ends of the radial shaft (1412) swing in the limiting through grooves (1410).

2. The adjustable centering shaft injection pump according to claim 1, characterized in that: A connecting piece (130) is provided on the output shaft of the No. 1 motor (110), and a No. 1 connecting protrusion (1301) and a No. 2 connecting protrusion (1401) are respectively provided on the side where the connecting piece (130) and the centering shaft (140) are close to each other, and the No. 1 connecting protrusion (1301) and the No. 2 connecting protrusion (1401) are complementary.

3. The adjustable centering shaft injection pump according to claim 2, characterized in that: The first connecting protrusion (1301) and the second connecting protrusion (1401) are arranged together in the bearing.

4. The adjustable centering shaft injection pump according to claim 1, characterized in that: The regulating valve (120) comprises a rotating valve head (121) and a fixed valve head (122); the rotating valve head (121) is mounted on the right shaft (142).

5. The adjustable centering shaft injection pump according to claim 4, characterized in that: The rotary valve head (121) is provided with a communication groove (1211), and the fixed valve head (122) is provided with a plurality of circulation grooves and a transition groove (1223); one end of the communication groove (1211) located at the center of the circle is connected to the injection tube (40) via the transition groove (1223).

6. The adjustable centering shaft injection pump according to claim 5, characterized in that: The end of the connecting groove (1211) away from the center of the circle can be connected to any one of the circulation grooves.

7. The adjustable centering shaft injection pump according to claim 1, characterized in that: The injection piece drive mechanism (20) comprises a threaded rod (230), a limiting rod (240) and a moving piece (250); the moving piece (250) is threadedly sleeved on the threaded rod (230), and the moving piece (250) is movably sleeved on the limiting rod (240).

8. The adjustable centering shaft injection pump according to claim 7, characterized in that: The injection piece driving mechanism (20) further comprises a second motor (210) and a transmission member (220), wherein the output shaft of the second motor (210) is transmission-connected to the threaded rod (230) via the transmission member (220).

9. The adjustable centering shaft injection pump according to claim 8, characterized in that: The second motor (210), the threaded rod (230) and the limit rod (240) are arranged vertically side by side below the first motor (110).

10. An adjustable centering shaft injection pump according to any one of claims 7 to 9, characterized in that: One side of the moving member (250) is connected to the piston rod (410) of the injection tube (40).

Images