Pump body of plunger infusion pump

The plunger infusion pump body addresses the issue of plunger surface dirt removal by using a rotating sleeve and baffle system to extend the plunger's service life and maintain efficient liquid transfer.

CN222162842UActive Publication Date: 2024-12-13TIANJIN HAIRUIKE TECH
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Patent Information

Application Number
CN202420577448.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-25
Publication Date
2024-12-13
Estimated Expiration
2034-03-25

AI Technical Summary

Technical Problem

Existing plunger infusion pumps require external structures for cleaning, which do not effectively remove dirt from the plunger surface, leading to potential friction and damage, thereby reducing the service life of the sliding plunger.

Method used

A plunger infusion pump body design featuring a rotating sleeve with a replacement baffle, sliding plunger, movable baffle ball, spring, and limit baffle rings that allow for uninterrupted liquid replacement, ensuring impurities are removed with the replacement liquid without causing friction or damage to the plunger.

Benefits of technology

The design extends the service life of the sliding plunger by allowing impurities to be directly removed with replacement liquid during operation, preventing friction and damage, while ensuring smooth operation and efficient liquid transfer.

✦ Generated by Eureka AI based on patent content.

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Abstract

A plunger infusion pump body comprises a rotating sleeve, a replacement baffle, a sliding plunger, a movable blocking ball, a spring, a fixing sleeve, an outer limiting baffle ring, an inner limiting baffle ring and a fixing disc, a side rotating shaft is arranged on the side face of the rotating sleeve, the replacement baffle is provided with a side rotating shaft receding hole, the side rotating shaft is matched with the side rotating shaft receding hole, and the side rotating shaft penetrates through the side rotating shaft receding hole. The side rotating shaft rotates in the side rotating shaft receding hole, the side face of the rotating sleeve is attached to the replacement baffle, the rotating sleeve is provided with a plurality of rotating sleeve inner holes, the circular blocking pieces are matched with the rotating sleeve inner holes, the circular blocking pieces are inserted into and connected with the rotating sleeve inner holes, the circular blocking pieces are aligned to the side face of the rotating sleeve, and the circular blocking pieces are provided with circular blocking piece inner holes. The replacement baffle is provided with liquid replacement holes, a group of liquid replacement holes are symmetrically arranged, an inner hole of the circular separation blade is opposite to the liquid replacement holes, and the sliding plunger is matched with an inner hole of the rotating sleeve and inserted into the inner hole of the rotating sleeve.
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Description

Technical Field

[0001] The utility model relates to the field of plunger infusion pumps, in particular to a plunger infusion pump body. Background Art

[0002] The existing patent (publication number: CN106334232A) proposes a high-pressure plunger infusion pump, including: a pump body, a connector, and a liquid inlet pipe arranged at the inlet of the pump body, and a liquid outlet pipe arranged at the outlet of the pump body. The pump body is provided with a plunger cavity, and the end face of the pump body provided with the plunger cavity is installed with a connector. One end of the plunger rod passes through the connector and is slidably installed in the plunger cavity. The other end of the plunger rod is installed in cooperation with a power push rod. The power push rod and the outside of the plunger rod are provided with a power seat. One end of the power seat is fixedly installed on the side wall of the connector. A cleaning device is provided between the plunger rod and the connector. The cleaning device is connected to the cleaning power device, and the cleaning power device is fixedly installed in the wall of the power seat. The cleaning power device is installed in cooperation with the power push rod. The cleaning medium of this device flows through the cleaning device to clean the plunger rod, so that the plunger rod can be quickly cleaned. However, this device needs to use an external structure to clean the plunger rod, and the dirt on the plunger surface cannot be removed by flowing liquid, which needs to be improved. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a plunger infusion pump body which can repeatedly replace liquid by uninterrupted rotation of a rotating sleeve, wherein impurities are directly taken away with the replacement liquid during use, and friction and damage to the outer diameter of the sliding plunger will not be caused, thereby extending the service life of the sliding plunger.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A plunger infusion pump body comprises a rotating sleeve, a replacement baffle, a sliding plunger, a movable baffle ball, a spring, a fixed sleeve, an outer limit baffle ring, an inner limit baffle ring, and a fixed plate. The rotating sleeve has a side shaft on the side, and the replacement baffle has a side shaft clearance hole. The side shaft is adapted to the side shaft clearance hole, the side shaft passes through the side shaft clearance hole, the side shaft rotates in the side shaft clearance hole, the side of the rotating sleeve is fitted with the replacement baffle, the rotating sleeve has a plurality of rotating sleeve inner holes, a circular baffle is adapted to the rotating sleeve inner hole, the circular baffle is inserted into and connected to the rotating sleeve inner hole, the circular baffle is aligned with the side of the rotating sleeve, the circular baffle has a circular baffle inner hole, the replacement baffle has a liquid replacement hole, a group of liquid replacement holes are symmetrically arranged, the circular baffle inner hole is opposite to the liquid replacement hole, the sliding plunger is adapted to the rotating sleeve inner hole, the sliding plunger is inserted into the rotating sleeve inner hole, the sliding plunger slides in the rotating sleeve inner hole, and a plurality of sliding plungers are evenly distributed on the rotating sleeve.

[0006] The sliding plunger has a large diameter hole, the fixed sleeve is adapted to the large diameter hole, the fixed sleeve is inserted into the large diameter hole, the fixed sleeve is connected to the large diameter hole, the fixed sleeve is aligned with the side of the sliding plunger, the fixed sleeve has a fixed sleeve inner hole, the upper part of the fixed sleeve has a fixed sleeve upper plate, the lower part of the guide rod is connected to the fixed sleeve upper plate, the spring is sleeved on the guide rod, and the lower part of the spring is against the fixed sleeve upper plate.

[0007] The movable stop ball is inserted into the large diameter hole, and a small diameter hole is provided on the side of the large diameter hole. The sliding plunger has a liquid outlet hole, which is communicated with the small diameter hole. The upper end of the spring is against the movable stop ball, and a plunger side ball is provided on the side of the sliding plunger. The outer limit stop ring is connected to the fixed disk, and the inner limit stop ring is connected to the fixed disk. Beneficial Effects

[0008] 1. The replacement baffle of the utility model is placed on the side of the rotating sleeve and kept fixed. The side rotating shaft passes through the side rotating shaft clearance hole. The side rotating shaft rotates to make the rotating sleeve rotate on the side of the replacement baffle. The circular baffle is fixed in the inner hole of the rotating sleeve. The circular baffle ensures that the inner hole of the circular baffle is connected with the liquid replacement hole. The sliding plunger is placed in the inner hole of the rotating sleeve and can slide. The fixed sleeve is fixed inside the sliding plunger. The guide rod guides the spring to prevent the spring from bending when it is under pressure when the plunger infusion pump body is used. The spring uses the upper plate of the fixed sleeve as a support to apply pressure to the moving baffle ball so that the moving baffle ball In a natural state, it is placed at the junction of the small diameter hole and the large diameter hole to seal the small diameter hole, and the outer limit stop ring and the inner limit stop ring are fixed on the fixed disk. The outer limit stop ring and the inner limit stop ring can fix multiple plunger side balls without affecting the sliding of the plunger side balls in the outer limit stop ring and the inner limit stop ring. The structure of the outer limit stop ring and the inner limit stop ring prevents the plunger side ball from sliding out of the outer limit stop ring and the inner limit stop ring when the plunger infusion pump body is in use, so that the side surface of the plunger side ball always keeps in contact with the fixed disk, thereby ensuring the use and operation of the plunger side ball.

[0009] 2. The utility model rotates the rotating sleeve when in use, and the rotating sleeve drives the plunger side ball to slide in the outer limit baffle ring and the inner limit baffle ring during the rotation process. The contact surface between the fixed disk and the plunger side ball is an inclined surface. When the plunger side ball slides, the plunger side ball slides in the inner hole of the rotating sleeve under the limit of the fixed disk and the outer limit baffle ring and the inner limit baffle ring. The sliding plunger slides back and forth in the inner hole of the rotating sleeve through the rotation of the rotating sleeve. When the sliding plunger is at the bottom, the moving baffle ball blocks the small diameter hole, and the sliding plunger closes and rotates The liquid in the inner hole of the moving sleeve is pressed out from the inner hole of the circular baffle and the liquid replacement hole. When the sliding plunger is at the upper part, the moving baffle ball is loosened under the action of pressure, and the liquid is drawn into the inner hole of the rotating sleeve from the liquid replacement hole and the inner hole of the circular baffle, and is discharged from the liquid outlet hole through the inner hole of the fixed sleeve, the large diameter hole, the small diameter hole, and the liquid replacement is achieved repeatedly through the uninterrupted rotation of the rotating sleeve. When in use, impurities are directly taken away with the replacement liquid, which will not cause friction or damage to the outer diameter of the sliding plunger, and can extend the service life of the sliding plunger. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the first axonometric view of the pump body of a plunger infusion pump described in the utility model.

[0011] Figure 2 This is the second axonometric view of the pump body of the plunger infusion pump described in the utility model.

[0012] Figure 3 This is a cross-sectional view of a plunger infusion pump body according to the utility model.

[0013] Figure 4 This is an axonometric view of the rotating sleeve described in the utility model.

[0014] Figure 5 This is an axonometric view of the replacement baffle described in the utility model.

[0015] Figure 6 This is an axonometric view of the sliding plunger described in the utility model.

[0016] Figure 7 Axonometric drawing of the fixing sleeve described in the utility model.

[0017] Figure 8 This is an axonometric view of the fixed disk described in the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below according to the accompanying drawings and embodiments:

[0019] Embodiment 1:

[0020] A plunger infusion pump body, including a rotating sleeve 01, a replacement baffle 05, a sliding plunger 08, a movable baffle ball 13, a spring 14, a fixed sleeve 15, an outer limit baffle ring 19, an inner limit baffle ring 20, and a fixed disk 21. The rotating sleeve 01 has a side shaft 04 on the side, the replacement baffle 05 has a side shaft clearance hole 07, the side shaft 04 is adapted to the side shaft clearance hole 07, the side shaft 04 passes through the side shaft clearance hole 07, the side shaft 04 rotates in the side shaft clearance hole 07, the side shaft 04 rotates to make the rotating sleeve 01 rotate on the side of the replacement baffle 05, the side of the rotating sleeve 01 is fitted with the replacement baffle 05, the replacement baffle 05 is placed on the side of the rotating sleeve 01 to keep it fixed, the rotating sleeve 01 has a plurality of rotating sleeve inner holes 02, and the circular baffle 22 is connected to the rotating sleeve. The circular baffle 22 is adapted to the inner hole 02 of the rotating sleeve, the circular baffle 22 is inserted into and connected to the inner hole 02 of the rotating sleeve, the circular baffle 22 is aligned with the side of the rotating sleeve 01, the circular baffle 22 has a circular baffle inner hole 03, the circular baffle 22 is fixed in the inner hole 02 of the rotating sleeve, the circular baffle 22 ensures that the circular baffle inner hole 03 is connected with the liquid replacement hole 06, the replacement baffle 05 has a liquid replacement hole 06, a group of liquid replacement holes 06 are symmetrically arranged, the circular baffle inner hole 03 is opposite to the liquid replacement hole 06, the sliding plunger 08 is adapted to the inner hole 02 of the rotating sleeve, the sliding plunger 08 is inserted into the inner hole 02 of the rotating sleeve, the sliding plunger 08 slides in the inner hole 02 of the rotating sleeve, the sliding plunger 08 is placed in the inner hole 02 of the rotating sleeve and can slide, and multiple sliding plungers 08 are evenly distributed on the rotating sleeve 01.

[0021] Embodiment 2:

[0022] The sliding plunger 08 described in the utility model has a large diameter hole 09, and the fixed sleeve 15 is adapted to the large diameter hole 09. The fixed sleeve 15 is inserted into the large diameter hole 09, and the fixed sleeve 15 is connected to the large diameter hole 09. The fixed sleeve 15 is fixed inside the sliding plunger 08, and the fixed sleeve 15 is aligned with the side of the sliding plunger 08. The fixed sleeve 15 has a fixed sleeve inner hole 18, and the upper part of the fixed sleeve 15 has a fixed sleeve upper plate 16, and the lower part of the guide rod 17 is connected to the fixed sleeve upper plate 16. The spring 14 is sleeved on the guide rod 17, and the lower part of the spring 14 is against the fixed sleeve upper plate 16.

[0023] Embodiment 3:

[0024] The movable stop ball 13 of the utility model is inserted into the large diameter hole 09, and the side of the large diameter hole 09 is provided with a small diameter hole 10, and the sliding plunger 08 is provided with a liquid outlet hole 11, and the liquid outlet hole 11 is communicated with the small diameter hole 10, and the upper end of the spring 14 is against the movable stop ball 13, and the guide rod 17 guides the spring 14, and prevents the spring 14 from bending when the plunger infusion pump body is in use. The spring 14 uses the fixed sleeve upper plate 16 as a support to apply pressure to the movable stop ball 13 so that the movable stop ball 13 is placed at the junction of the small diameter hole 10 and the large diameter hole 09 in a natural state to block the small diameter hole 10, and the side of the sliding plunger 08 is provided with a plunger side ball 12, an outer limit stop ring 19 is connected to the fixed disk 21, and an inner limit stop ring 20 is connected to the fixed disk 21, and the outer limit stop ring 19 and the inner limit stop ring 20 are fixed on the fixed disk 21.

[0025] Embodiment 4:

[0026] The side surface of the plunger side ball 12 of the utility model is fitted with the fixed disk 21, the inner side surface of the outer limit retaining ring 19 is fitted with the plunger side ball 12, and the outer side surface of the inner limit retaining ring 20 is fitted with the plunger side ball 12. The plunger side ball 12 slides between the outer limit retaining ring 19 and the inner limit retaining ring 20. While fixing multiple plunger side balls 12 by the outer limit retaining ring 19 and the inner limit retaining ring 20, the sliding of the plunger side ball 12 in the outer limit retaining ring 19 and the inner limit retaining ring 20 is not affected. The structure of the outer limit retaining ring 19 and the inner limit retaining ring 20 prevents the plunger side ball 12 from sliding out of the outer limit retaining ring 19 and the inner limit retaining ring 20 when the plunger infusion pump body is in use, so that the side surface of the plunger side ball 12 is always kept in fit with the fixed disk 21, ensuring the use and operation of the plunger side ball 12. The rotating sleeve 01 rotates on the side of the replacement baffle 05. When in use, the rotating sleeve 01 rotates. During the rotation process, the rotating sleeve 01 drives the plunger side ball 12 to slide in the outer limit baffle ring 19 and the inner limit baffle ring 20. The contact surface between the fixed disk 21 and the plunger side ball 12 is an inclined surface. When the plunger side ball 12 slides, the plunger side ball 12 slides in the rotating sleeve inner hole 02 under the limitation of the fixed disk 21 and the outer limit baffle ring 19 and the inner limit baffle ring 20. The rotation of the rotating sleeve 01 causes the sliding plunger 08 to slide back and forth in the rotating sleeve inner hole 02. When the sliding plunger 08 is at the bottom, the moving baffle ball 13 is against the small diameter hole 10 Blocking, the sliding plunger 08 is closed to press the liquid in the rotating sleeve inner hole 02 out from the circular baffle inner hole 03 and the liquid replacement hole 06. When the sliding plunger 08 is at the upper part, the movable baffle ball 13 is loosened under the action of pressure, and the liquid is drawn into the rotating sleeve inner hole 02 from the liquid replacement hole 06 and the circular baffle inner hole 03 and discharged from the liquid outlet hole 11 through the fixed sleeve inner hole 18, the large diameter hole 09, the small diameter hole 10. The liquid is replaced repeatedly through the uninterrupted rotation of the rotating sleeve 01. When in use, impurities are directly taken away with the replacement liquid, which will not cause friction and damage to the outer diameter of the sliding plunger, and the service life of the sliding plunger can be extended.

[0027] Embodiment 5:

[0028] The installation steps of the utility model are as follows: first, put the spring 14 on the guide rod 17, insert the movable blocking ball 13 into the large diameter hole 09, insert the fixed sleeve 15 into and connect the large diameter hole 09, insert the circular blocking piece 22 into and connect the inner hole 02 of the rotating sleeve, insert the sliding plunger 08 into the inner hole 02 of the rotating sleeve, pass the side rotating shaft 04 through the side rotating shaft clearance hole 07, place the plunger side ball 12 between the outer limit blocking ring 19 and the inner limit blocking ring 20, and connect the outer limit blocking ring 19 and the inner limit blocking ring 20 to the fixed disk 21.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A plunger infusion pump body, Its characteristics are : It comprises a rotating sleeve (01), a replacement baffle (05), a sliding plunger (08), a movable baffle ball (13), a spring (14), a fixed sleeve (15), an outer limit baffle ring (19), an inner limit baffle ring (20), and a fixed disk (21). The rotating sleeve (01) has a side rotating shaft (04) on its side, the replacement baffle (05) has a side rotating shaft clearance hole (07), the side rotating shaft (04) is adapted to the side rotating shaft clearance hole (07), the side rotating shaft (04) passes through the side rotating shaft clearance hole (07), the side rotating shaft (04) rotates in the side rotating shaft clearance hole (07), the side of the rotating sleeve (01) is fitted with the replacement baffle (05), the rotating sleeve (01) has a plurality of rotating sleeve inner holes (02), the circular baffle (05) is provided with a plurality of rotating sleeve inner holes (02), and the rotating sleeve (01) has a plurality of rotating sleeve inner holes (02). The sheet (22) is adapted to the inner hole (02) of the rotating sleeve, the circular baffle (22) is inserted into and connected to the inner hole (02) of the rotating sleeve, the circular baffle (22) is aligned with the side of the rotating sleeve (01), the circular baffle (22) has a circular baffle inner hole (03), the displacement baffle (05) has a liquid displacement hole (06), a group of liquid displacement holes (06) are symmetrically arranged, the circular baffle inner hole (03) is opposite to the liquid displacement hole (06), the sliding plunger (08) is adapted to the inner hole (02) of the rotating sleeve, the sliding plunger (08) is inserted into the inner hole (02) of the rotating sleeve, the sliding plunger (08) slides in the inner hole (02) of the rotating sleeve, and a plurality of sliding plungers (08) are evenly distributed on the rotating sleeve (01).

2. A plunger infusion pump body according to claim 1, Its characteristics are The sliding plunger (08) has a large diameter hole (09), the fixed sleeve (15) is adapted to the large diameter hole (09), the fixed sleeve (15) is inserted into the large diameter hole (09), the fixed sleeve (15) is connected to the large diameter hole (09), the fixed sleeve (15) is aligned with the side of the sliding plunger (08), the fixed sleeve (15) has a fixed sleeve inner hole (18), the upper part of the fixed sleeve (15) has a fixed sleeve upper plate (16), the lower part of the guide rod (17) is connected to the fixed sleeve upper plate (16), the spring (14) is sleeved on the guide rod (17), and the lower part of the spring (14) is against the fixed sleeve upper plate (16).

3. A plunger infusion pump body according to claim 2, Its characteristics are The movable stop ball (13) is inserted into the large diameter hole (09), the side of the large diameter hole (09) has a small diameter hole (10), the sliding plunger (08) has a liquid outlet hole (11), the liquid outlet hole (11) is connected to the small diameter hole (10), the upper end of the spring (14) is against the movable stop ball (13), the side of the sliding plunger (08) has a plunger side ball (12), the outer limit stop ring (19) is connected to the fixed disk (21), and the inner limit stop ring (20) is connected to the fixed disk (21).

4. A plunger infusion pump body according to claim 3, Its characteristics are The side surface of the plunger side ball (12) is in contact with the fixed plate (21), and the inner side surface of the outer limit retaining ring (19) is in contact with the plunger side ball (12).

5. A plunger infusion pump body according to claim 4, Its characteristics are The outer side surface of the inner limit stop ring (20) fits with the plunger side ball (12), the plunger side ball (12) slides between the outer limit stop ring (19) and the inner limit stop ring (20), and the rotating sleeve (01) rotates on the side of the replacement baffle (05).