Pulley flow regulator and infusion equipment

Abstract

The invention relates to the technical field of medical instruments, in particular to a pulley flow regulator and infusion equipment. The pulley flow regulator comprises a supporting protrusion which is arranged on the side wall of an inner cavity of the support and extends in the length direction of the support; the adjusting pulley comprises a roller which is arranged on the bracket in a rolling manner and an annular protruding part which is arranged on the side part of the roller; the annular protruding part abuts against the supporting protrusion. The flow control slope is arranged on the side wall of the inner cavity of the bracket; the support, the annular protruding part and the flow control slope define a variable-diameter cavity used for containing an infusion hose. Through the support, the annular protruding part and the flow control slope which are matched with one another, the position structure for controlling the flow speed is changed to the inner side face of the support, and the problems that in a pulley flow regulator in the prior art, the dripping speed control stroke is short, the dripping speed control change is fast, fine adjustment is difficult, injection molding deformation is prone to occurring, and the service life is short are effectively solved. And the pulley flow regulator is difficult to turn off.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to a pulley flow regulator and an infusion device. Background Art

[0002] Pulley flow regulators are widely used in the field of medical equipment. In the use of medical equipment such as infusion and blood collection, the use of flow regulators is often involved. This flow regulator is a common accessory used to control the flow in the pipeline.

[0003] The pulley flow regulator in the prior art is as follows Fig. 9 As shown, it mainly includes: a bracket 101, a pulley 102, the pulley 102 is installed in the bracket through the open large port 103 of the bracket 101, and the pulley shaft of the pulley 102 is inserted into the slideway 104 of the bracket 101. During use, the hose is inserted between the pulley 102 and the bracket bottom surface 105 of the bracket 101, and the hose lifts the pulley 102. Since the pulley shaft is in the slideway 104 of the bracket 101, the bracket 101 plays a role in limiting the pulley 102. Therefore, the hose is flattened by the gap formed by the pulley 102 and the bracket bottom surface 105, so that the inner diameter of the hose forms a space gap. The operator pushes the pulley 102 to slide in the bracket 101 with the thumb, and then adjusts the size of the gap to change the liquid flow in the hose and control the dripping speed of the liquid.

[0004] However, the pulley flow regulator in the prior art adjusts the dripping speed of the pulley flow regulator by squeezing the hose on the surface of the pulley 102. It has the following problems: 1. The stroke for controlling the dripping speed is short. In actual use, the demand for the infusion dripping speed is usually 80 drops to 20 drops per minute, because the inclination angle of the slideway 104 and the bottom surface 105 of the bracket in the prior art is large. When the dripping speed is 80 drops per minute, the above-mentioned pulley 102 is already in the position of the open small port 106 close to the bracket 101, so the adjustable stroke that can be used becomes very short. 2. The control dripping speed changes quickly and fine-tuning is difficult. Since the gap used to control the flow in the pulley flow regulator is formed by squeezing the hose between the pulley 102 and the bottom surface 105 of the bracket, the angle formed by the above-mentioned pulley 102 and the bottom surface 105 of the bracket is large, causing the above-mentioned spacing to shrink quickly, the cavity gap changes quickly, and the dripping speed changes quickly, and it is very difficult to achieve accurate control of the dripping speed or fine-tuning. 3. The pulley 102 is relatively wide, which is prone to injection deformation, and it is difficult to close the pulley flow regulator. Since the pulley 102 is a bilaterally symmetrical structure, the middle is a solid support surface composed of four reinforcing ribs. The rolling surface of the pulley 102 is relatively wide. During the injection molding process, the pulley rolling surface will shrink slightly in the middle position. In addition, the wider the pulley surface, the greater the degree of deformation and the more serious the pulley deformation problem. When the pulley flow regulator needs to adjust the flow to "0", the pulley surface deformation problem may cause a problem of poor closure. Due to the above reasons, the pulley surface size and the pulley diameter size are required to be relatively high. At the same time, the pipeline wall thickness is required to be properly controlled, and the bottom surface slope of the bracket supporting the pipeline is reasonably designed with high precision. The above requirements greatly increase the production process accuracy requirements of the pulley flow regulator and increase the production and manufacturing costs. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is how to solve the problems of the pulley flow regulator in the prior art, which is that the hose needs to be squeezed through the surface of the pulley, resulting in a short stroke for controlling the dripping rate, a fast change in the controlled dripping rate, difficulty in fine-tuning, and easy injection deformation, making it difficult to close the pulley flow regulator. In order to solve the above problems, the present invention provides: a pulley flow regulator, comprising:

[0006] Bracket;

[0007] A supporting protrusion is arranged on the inner cavity side wall of the stent and extends along the length direction of the stent;

[0008] The adjusting pulley comprises: a roller rollingly arranged on the bracket and an annular protrusion arranged at the side of the roller; the annular protrusion abuts against the supporting protrusion;

[0009] The flow control slope is arranged on the inner cavity side wall of the bracket; the bracket, the annular protrusion and the flow control slope together form a variable diameter cavity for accommodating the infusion hose, so as to change the cross-sectional area of ​​the infusion hose flow channel located in the variable diameter cavity.

[0010] Optionally, two ends of the bracket in the length direction are respectively a large opening end and a small opening end;

[0011] The slope of the flow control slope gradually increases from the large opening end to the small opening end, so that the cross-sectional area of ​​the flow channel of the infusion hose gradually decreases to be closed, and liquid cannot pass through the infusion hose.

[0012] Optionally, a gap between the rolling surface of the roller and the bottom surface of the inner cavity of the bracket is smaller than twice the wall thickness of the infusion hose, so as to squeeze the infusion hose into the variable diameter cavity.

[0013] Optionally, a guiding slope for guiding the infusion hose to enter the variable diameter cavity is provided between the flow control slope and the bottom surface of the inner cavity of the bracket.

[0014] Optionally, the support protrusion is arranged on one side of the inner cavity side wall of the bracket; the distance between the support protrusion and the other side of the inner cavity side wall of the bracket is adapted to the thickness of the adjusting pulley to avoid position deviation of the adjusting pulley during rotation.

[0015] Optionally, the adjusting pulley is arranged perpendicular to the bottom surface or the top surface of the inner cavity of the bracket.

[0016] Optional pulley flow regulator, also includes:

[0017] Slideways are respectively arranged on the left and right sides of the inner cavity side wall of the bracket; the slideways are connected with the pulley shaft on the adjusting pulley to guide the adjusting pulley to reciprocate between the large opening end and the small opening end;

[0018] A guide rail is arranged at the large opening end and is used to guide the adjusting pulley to be installed from the large opening end to the slideway of the bracket.

[0019] Optional pulley flow regulator, also includes:

[0020] A top limiting protrusion is arranged on the top surface of the inner cavity of the stent, close to one side of the small opening end;

[0021] The bottom limiting protrusion is arranged on the bottom surface of the inner cavity of the bracket, close to the side of the small opening end; the top limiting protrusion and the bottom limiting protrusion cooperate to guide the adjusting pulley to squeeze the infusion hose to prevent the infusion hose from leaking.

[0022] Optionally, the top limiting protrusion is a strip-shaped protrusion arranged on the bottom surface of the inner cavity; and / or the bottom limiting protrusion is an arc-shaped step arranged on the bottom surface of the inner cavity.

[0023] An infusion device comprises: the above-mentioned pulley flow regulator.

[0024] The technical solution of the present invention has the following advantages:

[0025] 1. The pulley flow regulator provided by the present invention is provided with a support protrusion extending along the length direction of the bracket at the position of the inner cavity side wall of the bracket. In addition, an annular protrusion abutting against the above-mentioned support protrusion is provided at the roller side position of the adjusting pulley. In addition, a flow control slope is also provided at the inner cavity side wall position of the bracket. The above-mentioned bracket, the annular protrusion and the flow control slope form a variable diameter cavity for accommodating the infusion hose. The cross-sectional area of ​​the flow channel of the infusion hose located in the variable diameter cavity can be changed through the variable diameter cavity. The above-mentioned structural design can effectively achieve the following beneficial effects: 1. In actual use, the infusion drip rate is usually required to be 80 drops to 20 drops per minute. However, the adjustable stroke that can be used by the pulley flow regulator in the prior art becomes very short and cannot meet the actual use requirements. In the present invention, by controlling the length and angle of the flow control slope, the adjustment stroke from 80 drops to 20 drops per minute is designed to be very long, which increases the convenience for clinical operation and avoids the situation that the stroke is short, the tube is completely sealed and there is no dripping rate after a slight movement, and precise control is achieved. The pulley flow regulator in the present invention uses a stroke of 25mm, and the adjustment stroke of 80 drops to 20 drops per minute is designed to be between 5-10mm, that is, the stroke of the thumb wave pulley, which is convenient for practical application operation and rapid adjustment. 2. In the present invention, the inner cavity wall of the above-mentioned bracket, the annular protrusion of the adjustment pulley and the roller face the infusion hose to form a solid circular or elliptical cavity. Compared with the space generated by the two-sided extrusion, the cavity in the present invention has better support and more stability, which can avoid the situation that the channel through which the liquid passes is sealed due to the rebound of the infusion hose or the tube wall itself. 3. In the present invention, there is no need to adjust the drip speed of the pulley flow regulator by squeezing the hose on the surface of the pulley. This makes the rolling surface of the adjusting pulley narrower, reduces the problem of shrinkage and deformation of the adjusting pulley, reduces the difficulty of injection molding, relaxes the requirements for the injection molding process, and improves the product quality rate.

[0026] 2. The pulley flow regulator provided by the present invention has a flow control slope whose slope gradually increases from the large opening end to the small opening end, so that the cross-sectional area of ​​the flow channel of the infusion hose gradually decreases to be closed, and liquid cannot pass through the infusion hose. The inner cavity wall of the above-mentioned bracket and the annular protrusion of the adjustment pulley squeeze the infusion hose, so that the infusion hose tilts toward the flow control slope. As the operator slides the adjustment pulley, the cavity will gradually become smaller as the slope increases, and at the end of the slope, the cavity is completely closed, and liquid cannot pass through. The above-mentioned flow control slope that gradually increases from the large opening end to the small opening end plays a key role in controlling the flow rate. The position structure for controlling the flow rate is changed to the inner side of the bracket, thereby helping the operator to accurately and quickly adjust the flow channel cross-sectional area of ​​the infusion hose.

[0027] 3. In the pulley flow regulator provided by the present invention, a guiding slope is further provided between the flow control slope and the inner cavity bottom surface of the bracket. The guiding slope can effectively guide the infusion hose to be squeezed and deformed, and the infusion hose beyond the squeezing surface is bent and deformed under the guiding action of the guiding slope so as to enter the variable diameter cavity.

[0028] 4. In the pulley flow regulator provided by the present invention, the support protrusion is arranged on one side of the inner cavity side wall of the bracket. Moreover, the distance between the support protrusion and the inner cavity side wall of the other side of the bracket is just enough to accommodate the above-mentioned regulating pulley, thereby ensuring that the regulating pulley can roll smoothly and will not be offset during the rotation process.

[0029] 5. The pulley flow regulator provided by the present invention can effectively facilitate operators to install the regulating pulley from the large opening end to the slideway of the bracket, and ensure that the regulating pulley rolls smoothly on the slideway, through the slideways arranged on the left and right sides of the inner cavity side wall of the bracket and the guide rails arranged at the large opening end.

[0030] 6. The pulley flow regulator provided by the present invention further includes: a top limiting protrusion and a bottom limiting protrusion. The top limiting protrusion and the bottom limiting protrusion can effectively cooperate to guide the regulating pulley to squeeze the infusion hose to prevent the infusion hose from leaking.

[0031] 7. The infusion device provided by the present invention comprises: the above pulley flow regulator. Therefore, the infusion device has all the beneficial effects of the pulley flow regulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the three-dimensional structure of a pulley flow regulator provided by the present invention;

[0034] Figure 2 A schematic diagram of the internal structure of the bracket provided by the present invention at the large opening end;

[0035] Figure 3 A longitudinal cross-sectional view of the stent provided by the present invention;

[0036] Figure 4 A schematic diagram of the connection structure between the adjusting pulley and the internal structure of the bracket provided by the present invention;

[0037] Figure 5 A schematic diagram of the three-dimensional structure of the adjusting pulley provided by the present invention;

[0038] Figure 6 A schematic diagram showing the position of the infusion hose in the pulley flow regulator provided by the present invention when the infusion hose is in an open state;

[0039] Figure 7 A schematic diagram showing the position of the infusion hose in the pulley flow regulator provided by the present invention when the infusion hose is in a closed state;

[0040] Figure 8 A schematic diagram of a three-dimensional structure of one side of the inner cavity of the stent provided by the present invention without a supporting protrusion;

[0041] Fig. 9 It is a schematic diagram of the internal structure of a pulley flow regulator in the prior art.

[0042] Description of reference numerals:

[0043] 1-bracket; 2-support protrusion; 3-adjusting pulley; 4-roller; 5-annular protrusion; 6-flow control slope; 7-diameter cavity; 8-large opening end; 9-small opening end; 10-guide slope; 11-inner cavity bottom surface; 12-inner cavity top surface; 13-slideway; 14-guide rail; 15-infusion hose; 16-pulley shaft; 17-top limit protrusion; 18-bottom limit protrusion;

[0044] 101 - bracket; 102 - pulley; 103 - open large port; 104 - slideway; 105 - bracket bottom surface; 106 - open small port. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] See also Figure 1 and Figure 4 , Figure 1 A schematic diagram of the three-dimensional structure of a pulley flow regulator in an embodiment of the present invention is shown. Figure 4 A schematic diagram of the connection structure between the adjusting pulley and the internal structure of the bracket in an embodiment of the present invention is shown.

[0048] A pulley flow regulator provided in this embodiment includes:

[0049] Bracket 1, such as Figure 2 and Figure 3 As shown, the two ends of the bracket 1 in the length direction are a large opening end 8 and a small opening end 9 respectively;

[0050] Support protrusion 2, such as Figure 3 As shown, it is arranged at the inner cavity side wall position of the stent 1 and extends along the length direction of the stent 1; the above-mentioned support protrusion 2 is a convex rib structure arranged on the inner cavity side wall of the stent 1;

[0051] Adjust pulley 3, such as Figure 4 and Figure 5 As shown, it comprises: a roller 4 rollingly arranged on the bracket 1 and an annular protrusion 5 arranged at the side of the roller 4; the annular protrusion 5 abuts against the support protrusion 2; in addition, in order to ensure that there is no leakage of medium between the rolling surface of the roller 4 and the infusion hose 15. The gap between the rolling surface of the roller 4 and the inner cavity bottom surface 11 of the bracket 1 is less than twice the wall thickness of the infusion hose 15, so as to squeeze the infusion hose 15 into the variable diameter cavity 7;

[0052] Flow control ramp 6, such as Figure 3 and Figure 4As shown, the flow control slope 6 is arranged on the inner cavity side wall of the bracket 1; the bracket 1, the annular protrusion 5 and the flow control slope 6 together form a variable diameter cavity 7 for accommodating the infusion hose 15, so as to change the flow channel cross-sectional area of ​​the infusion hose 15 located in the variable diameter cavity 7. Moreover, the slope of the flow control slope 6 gradually increases from the large opening end 8 to the small opening end 9, so that the flow channel cross-sectional area of ​​the infusion hose 15 gradually decreases to be closed, and the liquid cannot pass through the infusion hose 15. The inner cavity wall of the bracket 1 and the annular protrusion 5 of the adjusting pulley 3 squeeze the infusion hose 15, so that the infusion hose 15 tilts toward the flow control slope 6. Moreover, as shown Figure 4 As shown, the bracket 1, the annular protrusion 5 and the flow control slope 6 form a variable diameter cavity 7 for accommodating the infusion hose 15. Figure 6 and Figure 7 The position diagram of the infusion hose in the pulley flow regulator is shown in an open state and a closed state. As the operator slides the adjustment pulley 3, the cavity gradually becomes smaller as the slope increases. At the end of the slope, the cavity of the infusion hose 15 is completely closed and liquid cannot pass through.

[0053] The guide slope 10, such as Figure 2 and Figure 3 As shown, the guide slope 10 is arranged between the flow control slope 6 and the inner cavity bottom surface 11 of the bracket 1, and is used to guide the infusion hose 15 to enter the variable diameter cavity 7. The guide slope 10 can effectively guide the infusion hose 15 to be squeezed and deformed. Under the guiding effect of the guide slope 10, the infusion hose 15 that exceeds the extrusion surface is bent and deformed to enter the variable diameter cavity 7;

[0054] Slide 13, such as Figure 3 As shown, the slideways 13 are respectively arranged on the left and right sides of the inner cavity side wall of the bracket 1; the slideway 13 is connected with the pulley shaft 16 on the adjusting pulley 3 to guide the adjusting pulley 3 to reciprocate between the large opening end 8 and the small opening end 9;

[0055] Guide rail 14, such as Figure 3 As shown, the guide rail 14 is arranged at the position of the large opening end 8 to guide the adjusting pulley 3 to be installed from the large opening end 8 to the slideway 13 of the bracket 1 .

[0056] In this embodiment, in order to guide the adjusting pulley 3 to squeeze the infusion hose 15, the infusion hose 15 is prevented from leaking. Figure 3 The pulley flow regulator also includes:

[0057] The top limiting protrusion 17 is arranged on the inner cavity top surface 12 of the stent 1, close to the side of the small opening end 9; the top limiting protrusion 17 is a strip-shaped protrusion arranged on the inner cavity bottom surface 11;

[0058] The bottom limiting protrusion 18 is arranged on the inner cavity bottom surface 11 of the bracket 1, close to the side of the small opening end 9; the bottom limiting protrusion 18 is an arc-shaped step arranged on the inner cavity bottom surface 11. The top limiting protrusion 17 and the bottom limiting protrusion 18 cooperate to guide the adjusting pulley 3 to squeeze the infusion hose 15, so as to prevent the infusion hose 15 from leaking liquid.

[0059] In this embodiment, if Figure 2 and Figure 8 As shown, the support protrusion 2 is arranged on one side of the inner cavity side wall of the bracket 1; the distance between the support protrusion 2 and the other side of the inner cavity side wall of the bracket 1 is adapted to the thickness of the adjusting pulley 3 to prevent the adjusting pulley 3 from being offset during the rotation process. At the same time, the adjusting pulley 3 is aligned with the inner cavity bottom surface 11 of the bracket 1.

[0060] Of course, in this embodiment, whether the adjusting pulley 3 is provided with the above-mentioned guiding inclined surface 10 is not specifically limited. In other embodiments, the above-mentioned guiding inclined surface 10 is not provided between the flow control slope 6 and the inner cavity bottom surface 11 of the bracket 1.

[0061] Of course, in this embodiment, whether the adjusting pulley 3 is perpendicular to the inner cavity bottom surface 11 of the bracket 1 is not specifically limited. In other embodiments, the adjusting pulley 3 is arranged perpendicular to the inner cavity top surface 12 of the bracket 1.

[0062] Of course, in this embodiment, the specific structure of the top limiting protrusion 17 and the bottom limiting protrusion 18 is not specifically limited. In other embodiments, the top limiting protrusion 17 and the bottom limiting protrusion 18 can also be strip-shaped protrusion structures respectively arranged on the bottom surface 11 and the top surface 12 of the inner cavity.

[0063] Example 2

[0064] An infusion device includes a pulley flow regulator.

[0065] The pulley flow regulator comprises the bracket 1, the supporting protrusion 2, the adjusting pulley 3, and the flow control ramp 6 in the embodiment 1.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A pulley flow regulator, characterized in that: include: Bracket (1); A supporting protrusion (2) is arranged on a side wall of the inner cavity of the stent (1) and extends along the length direction of the stent (1); The adjusting pulley (3) comprises: a roller (4) rollingly arranged on the bracket (1) and an annular protrusion (5) arranged at the side of the roller (4); the annular protrusion (5) abuts against the supporting protrusion (2); A flow control slope (6) is arranged on the side wall of the inner cavity of the support (1); the support (1), the annular protrusion (5) and the flow control slope (6) together form a variable diameter cavity (7) for accommodating an infusion hose (15) so as to change the cross-sectional area of ​​the flow channel of the infusion hose (15) located in the variable diameter cavity (7).

2. The pulley flow regulator according to claim 1, characterized in that: The two ends of the bracket (1) in the length direction are respectively a large opening end (8) and a small opening end (9); The slope of the flow control slope (6) gradually increases from the large opening end (8) to the small opening end (9), so that the cross-sectional area of ​​the flow channel of the infusion hose (15) gradually decreases until it is closed, and liquid cannot pass through the infusion hose (15).

3. The pulley flow regulator according to claim 1, characterized in that: The gap between the rolling surface of the roller (4) and the inner cavity bottom surface (11) of the bracket (1) is less than twice the wall thickness of the infusion hose (15), so as to squeeze the infusion hose (15) into the variable diameter cavity (7).

4. The pulley flow regulator according to claim 1, characterized in that: A guiding slope (10) for guiding the infusion hose (15) to enter the variable diameter cavity (7) is provided between the flow control slope (6) and the inner cavity bottom surface (11) of the support (1).

5. The pulley flow regulator according to claim 1, characterized in that: The support protrusion (2) is arranged on one side of the inner cavity side wall of the bracket (1); the distance between the support protrusion (2) and the other side of the inner cavity side wall of the bracket (1) is adapted to the thickness of the adjusting pulley (3) to avoid positional deviation of the adjusting pulley (3) during rotation.

6. The pulley flow regulator according to claim 5, characterized in that: The adjusting pulley (3) is arranged perpendicularly to the inner cavity bottom surface (11) or the inner cavity top surface (12) of the bracket (1).

7. The pulley flow regulator according to claim 2, characterized in that: Also includes: The slideways (13) are respectively arranged on the left and right sides of the inner cavity side wall of the bracket (1); the slideways (13) are connected with the pulley shaft (16) on the adjusting pulley (3) to guide the adjusting pulley (3) to move back and forth between the large opening end (8) and the small opening end (9); A guide rail (14) is arranged at the position of the large opening end (8) and is used to guide the adjusting pulley (3) to be installed from the large opening end (8) to the slideway (13) of the bracket (1).

8. The pulley flow regulator according to claim 2, characterized in that: Also includes: A top limiting protrusion (17) is arranged on the inner cavity top surface (12) of the bracket (1), close to the side of the small opening end (9); The bottom limiting protrusion (18) is arranged on the bottom surface (11) of the inner cavity of the bracket (1), close to the side of the small opening end (9); the top limiting protrusion (17) and the bottom limiting protrusion (18) cooperate to guide the adjusting pulley (3) to squeeze the infusion hose (15) to prevent the infusion hose (15) from leaking.

9. The pulley flow regulator according to claim 8, characterized in that: The top limiting protrusion (17) is a strip-shaped protrusion arranged on the bottom surface (11) of the inner cavity; and / or the bottom limiting protrusion (18) is an arc-shaped step arranged on the bottom surface (11) of the inner cavity.

10. An infusion device, characterized in that: include: A pulley flow regulator as claimed in any one of claims 1 to 9.

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