Adjustable pressure medical pressure maintaining valve

Abstract

The present invention provides a pressure-adjustable medical pressure-maintaining valve, which solves the technical problem that the pressure of existing medical drainage devices and pump infusion devices cannot be immediately adjusted; it comprises an upper cover and a lower cover, the upper cover is provided with a liquid inlet, the lower cover is provided with a liquid outlet, and a driving component for blocking or conducting is provided in the cavity surrounded by the upper cover and the lower cover; the lower cover comprises a telescopic lower cover and an adjusting sleeve, the telescopic lower cover comprises a cover body connected to the upper cover, a telescopic cylinder body formed by extending downward from an opening in the middle of the cover body, the telescopic cylinder body is located in the through hole of the adjusting sleeve and can enter and exit the adjusting sleeve; a slider is provided in the telescopic cylinder body, and the lower end of the driving component extends into the through hole of the slider; a partition is provided in the through hole of the adjusting sleeve, and the middle of the partition is connected to the slider upward; the partition is provided with a liquid through hole. The present invention is widely used in the field of medical device technology.

Description

Technical Field

[0001] The invention relates to a medical valve, in particular to a pressure-adjustable medical pressure-maintaining valve. Background Art

[0002] Most of the medical drainage devices and pump infusion devices currently on the market, such as cerebrospinal fluid drainage, pleural effusion drainage, urinary tract drainage, as well as syringe pumps, infusion pumps, CT syringe pumps, etc., rely on the difference between the intracavitary pressure and the atmospheric pressure for automatic drainage, or rely on the external power of the device for infusion. During the drainage and infusion process, the pressure cannot be adjusted immediately, and it is impossible to achieve pressure stabilization, pressure-controlled drainage or pressure-controlled infusion for different patients and different clinical conditions, which brings risks to patients, including but not limited to excessive drainage, insufficient drainage, overpressure infusion, insufficient infusion pressure, etc. Summary of the invention

[0003] The present invention aims at the technical problem that the pressure of existing medical drainage devices and pump infusion devices cannot be immediately regulated, and provides an adjustable pressure-maintaining medical pressure valve whose pressure can be immediately regulated.

[0004] To this end, the technical solution of the present invention is that it includes an upper cover and a lower cover, the upper cover is provided with a liquid inlet, the lower cover is provided with a liquid outlet, and a driving component for blocking or conducting is provided in the cavity surrounded by the upper cover and the lower cover; the lower cover includes a retractable lower cover and an adjusting sleeve, the retractable lower cover includes a cover body part connected to the upper cover, and a retractable cylinder body part formed by extending downward from an opening in the middle of the cover body part, the retractable cylinder body part is located in the through hole of the adjusting sleeve and can move in and out of the adjusting sleeve; a sliding block is provided in the telescopic cylinder body part, and the lower end of the driving component extends into the through hole of the sliding block; a partition is provided in the through hole of the adjusting sleeve, the middle part of the partition is connected to the sliding block upward through a push rod, and a bearing is provided between the push rod and the sliding block; the partition is provided with a liquid through hole.

[0005] Preferably, the telescopic cylinder body is threadedly connected to the adjusting sleeve, a locking ring is provided on the top of the adjusting sleeve, a locking piece is threadedly connected to a through hole on one side of the locking ring, and an end of the locking piece contacts the outer surface of the telescopic cylinder body.

[0006] Preferably, a bottom cover is connected to the bottom of the adjusting sleeve, and the bottom cover is provided with a bottom cover opening; a rotating joint is sandwiched between the bottom cover and the partition, and the rotating joint is provided with a liquid outlet, and the liquid outlet extends downward from the bottom cover opening.

[0007] Preferably, a limiting boss is provided on the inner surface of the bottom of the telescopic cylinder, the slider is divided into an upper slider part and a lower slider part, and the inner diameter of the limiting boss is smaller than the outer diameter of the upper slider part and larger than the inner diameter of the lower slider part.

[0008] Preferably, the driving assembly includes a driving member, a sealing gasket and a spring, the driving member includes a first driving part arranged between the upper cover and the cover body, and a second driving part located in the through hole of the slider, the sealing gasket is arranged on the side of the first driving part facing the upper cover, and the spring is clamped between the second driving part and the slider; the upper cover is provided with an upper cover protrusion for clamping or separating with the sealing gasket.

[0009] Preferably, the sealing gasket includes a sealing base arranged in a sealing groove of the first driving part and a raised part protruding from the middle of the sealing base; sealing pressure pieces for squeezing and fixing the sealing base are provided on both the inner and outer sides of the sealing gasket, and a blocking boss is provided at one end of the sealing pressure piece away from the raised part; a plurality of fixing columns are provided at the bottom of the sealing pressure piece, and the first driving part is provided with a fixing hole matching the fixing columns.

[0010] Preferably, a movable sleeve is provided on the outer surface of the liquid outlet connecting pipe, a groove is provided on the outer surface of the liquid outlet connecting pipe, and a boss matching the groove is provided on the inner surface of the movable sleeve.

[0011] Preferably, a first sealing ring is provided between the rotary joint and the partition, and a second sealing ring is provided between the telescopic cylinder and the adjusting sleeve.

[0012] Preferably, the cross sections of the slider and the second driving part are both cross-shaped.

[0013] Preferably, pressure scale lines are provided on the outer surface of the telescopic cylinder.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention can adjust the pressure instantly during use. The lower end face of the cover body of the telescopic lower cover is the upper limit end face. When the upper end face of the adjusting sleeve abuts against the end face, the pressure of the pressure-maintaining valve is the maximum value; the lower end face of the upper slider part of the slider is the lower limit end face. When the upper end face of the limiting boss of the telescopic cylinder part abuts against the end face, the pressure of the pressure-maintaining valve is the minimum value.

[0016] 2. The telescopic cylinder and the adjusting sleeve are connected by threads. A slider is provided in the through hole of the telescopic cylinder. The partition of the adjusting sleeve is connected with a push rod. A bearing is provided between the push rod and the inner surface of the slider to overcome the rotational torque during the use of the rotary switch, ensuring that there is no radial displacement when the sealing gasket contacts the upper cover protrusion, and only axial displacement can be generated, thereby ensuring the stability and precision of the product.

[0017] 3. A rotary joint, a movable sleeve and a first sealing ring are provided. During the rotation of the adjusting sleeve, the movable sleeve may rotate with it, but the rotary joint will not rotate with it. The catheter connected to the liquid outlet connecting pipe will not rotate with the adjusting sleeve after being fixed, which is convenient for product use. By adding the first sealing ring and the second sealing ring, liquid leakage during use and pressure regulation of the present invention is prevented. A second sealing ring is provided between the telescopic cylinder and the adjusting sleeve to prevent liquid leakage during use and pressure regulation of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the main view;

[0020] Figure 3 yes Figure 2 AA cross-sectional view of ;

[0021] Figure 4 It is a schematic diagram of the structure of the driving part;

[0022] Figure 5 It is a schematic diagram of the structure of the slider and the push rod;

[0023] Figure 6 It is a schematic diagram of the adjustment sleeve and the push rod viewed from above;

[0024] Figure 7 is a schematic BB cross-sectional view of convex 6;

[0025] Figure 8 yes Figure 3 Enlarged view of point A.

[0026] Explanation of symbols in the figure

[0027] 1. Upper cover; 2. Liquid inlet; 3. Liquid outlet connecting pipe; 4. Adjusting sleeve; 5. Cover body; 6. Telescopic cylinder body; 7. Sliding block; 8. Partition plate; 9. Push rod; 10. Liquid hole; 11. Push rod boss; 12. Bolt; 13. Flat washer; 14. Limit boss; 15. Upper slider; 16. Lower slider; 17. Spring; 18. First drive unit; 19. Second drive unit; 20. Upper limit boss 1. lower limit boss; 21. upper cover boss; 22. sealing base; 23. raised portion; 24. sealing pressure piece; 26. blocking boss; 27. fixing column; 28. sealing gasket; 29. ​​locking collar; 30. locking piece; 31. second sealing ring; 32. bottom cover; 33. bottom cover opening; 34. swivel joint; 35. first sealing ring; 36. adjusting convex strip; 37. bearing; 38. movable sleeve. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with embodiments.

[0029] like Figure 1-3 As shown in Figure 8, an adjustable pressure medical pressure-maintaining valve comprises an upper cover 1 and a lower cover, the upper cover 1 is provided with a liquid inlet 2, the lower cover is provided with a liquid outlet, a driving assembly for blocking or conducting the liquid inlet 2 and the liquid outlet is provided in the cavity surrounded by the upper cover 1 and the lower cover; the lower cover comprises a telescopic lower cover and an adjusting sleeve 4, the telescopic lower cover comprises a cover body 5 connected to the upper cover 1, a telescopic cylinder body 6 formed by extending downward from the middle opening of the cover body 5, the telescopic cylinder body 6 is located in the through hole of the adjusting sleeve 4 and can enter and exit the adjusting sleeve 4; a sliding block 7 is provided in the telescopic cylinder body 6, and the lower end of the driving assembly extends into the through hole of the sliding block 7; a partition 8 is provided in the through hole of the adjusting sleeve 4, and the middle part of the partition 8 is connected to the sliding block 7 upward through a push rod 9; the partition 8 is provided with a liquid through hole 10.

[0030] A limiting boss 14 is provided on the inner surface of the bottom of the telescopic cylinder 6 . The slider 7 is divided into an upper slider portion 15 and a lower slider portion 16 . The inner diameter of the limiting boss 14 is smaller than the outer diameter of the upper slider portion 15 and larger than the inner diameter of the lower slider portion 16 .

[0031] The driving assembly includes a driving member, a sealing gasket 28 for blocking or connecting the liquid inlet 2 and the liquid outlet, and a spring 17. The driving member includes a first driving portion 18 disposed between the upper cover 1 and the cover body 5, a second driving portion 19 located in the through hole of the slider 7, the sealing gasket 28 is disposed on the side of the first driving portion 18 facing the upper cover 1, and the spring 17 is clamped between the second driving portion 19 and the slider 7.

[0032] An upper limit boss 20 is provided at the upper end of the second driving part 19, a lower limit boss 21 is provided in the through hole of the slider 7, and the spring 17 is clamped between the upper limit boss 20 and the lower limit boss 21. The driving member releases or squeezes the spring 17 under the change of liquid pressure, and drives the sealing gasket 28 to clamp or separate from the upper cover 1.

[0033] The upper cover 1 is provided with an upper cover protrusion 22 for clamping or separating with the sealing gasket 28. The sealing gasket 28 includes a sealing base 23 arranged in the sealing groove of the first driving part 18 and a protrusion 24 protruding from the middle of the sealing base 23; both inner and outer sides of the sealing gasket 28 are provided with a sealing pressing piece 25 for pressing and fixing the sealing base 23, and one end of the sealing pressing piece 25 away from the protrusion 24 is provided with a blocking boss 26; the bottom of the sealing pressing piece 25 is provided with a plurality of fixing columns 27, and the first driving part 18 is provided with a fixing hole matched with the fixing columns 27.

[0034] like Figure 4 , 5 As shown, the cross sections of the slider 7 and the second driving portion 19 are both cross-shaped.

[0035] A first liquid channel is formed between the upper cover 1 and the first driving part 18, and a second liquid channel is formed between the second driving part 19, the slider 7 and the lower cover. The first liquid channel is connected to the liquid inlet 2, and the second liquid channel is connected to the liquid outlet. The first liquid channel and the second liquid channel are blocked or connected under the clamping or separation of the sealing gasket 28 and the upper cover protrusion 22. The setting of the sealing pressure piece 25 makes the combination of the sealing gasket 28 and the first driving part 18 more stable and not easy to fall off. When the upper cover protrusion 22 and the sealing gasket 28 clamp and block the liquid channel, the blocking boss 26 of the sealing pressure piece 25 plays an auxiliary blocking role.

[0036] The telescopic body 6 and the adjusting sleeve 4 can be connected by threads and then locked by a locking assembly; or they can be locked only by the locking assembly. The locking assembly includes a locking collar 29 and a locking member 30. The locking collar 29 is arranged on the top of the adjusting sleeve 4, and the through hole on one side of the locking collar 29 is threadedly connected with the locking member 30, and the end of the locking member 30 contacts the outer surface of the telescopic body 6. The outer surface of the telescopic body 6 is provided with a cylinder sealing groove, and a second sealing ring 31 is provided in the cylinder sealing groove.

[0037] A bottom cover 32 is clamped at the bottom of the adjusting sleeve 4, and a bottom cover opening 33 is provided on the bottom cover 32; a rotary joint 34 is clamped between the bottom cover 32 and the partition 8, and a liquid outlet connecting pipe 3 formed by a liquid outlet of the rotary joint 34 extending downward extends out of the bottom cover opening 33; a first sealing ring 35 is provided between the rotary joint 34 and the partition 8.

[0038] A movable sleeve 38 is provided on the outer surface of the liquid outlet connecting pipe 3 , a groove is provided on the outer surface of the liquid outlet connecting pipe 3 , and a boss matched with the groove is provided on the inner surface of the movable sleeve 38 .

[0039] The outer surface of the adjusting sleeve 4 is evenly distributed with adjusting convex strips 36, which is convenient for operators to hold. The outer surface of the telescopic cylinder 6 is marked with pressure scale lines.

[0040] like Figure 6 , 7 As shown, the partition 8 is provided with a fixing cylinder for fixing the push rod 9, and the fixing cylinder protrudes downward. A push rod boss 11 is provided in the middle of the push rod 9, and the bottom of the push rod 9 is inserted into the fixing cylinder and fixed by bolts 12. A flat washer 13 is provided between the lower end surface of the fixing cylinder and the bolts 12; the push rod boss 11 and the bolts 12 lock the push rod 9 on the partition 8.

[0041] Working principle: In the initial state, the sealing gasket 28 and the upper cover protrusion 22 are clamped against each other, and the first liquid channel and the second liquid channel are blocked; the liquid flows into the upper cover 1 cavity from the liquid inlet 2. When the liquid level is a certain height away from the driving rod (the pressure generated by the liquid is equal to the deformation force of the spring 17), the liquid continues to be added, the sealing gasket 28 is separated from the upper cover protrusion 22, the first liquid channel and the second liquid channel are connected, and the liquid passes through the first liquid channel, the second liquid channel, the liquid hole 10, and finally flows out from the liquid outlet connecting pipe 3 of the rotary joint 34. When the liquid level drops, the pressure generated by the liquid is equal to the deformation force of the spring 17, and the liquid continues to flow out, and the sealing gasket 28 contacts the protrusion of the upper cover 1 to maintain pressure.

[0042] When the telescopic body 6 and the adjusting sleeve 4 are connected by threads, during the process of adjusting the adjusting sleeve 4 up and down along the threads of the telescopic body 6, a spiral downward or upward rotation force will be generated along the axial direction of the rotary switch. In order to prevent the rotational torque from reducing the sealing performance of the sealing gasket 28, a bearing 37 is provided between the push rod 9 and the inner surface of the slider 7 to overcome the rotational torque during the use of the rotary switch, and ensure that the sealing gasket 28 has no radial displacement when in contact with the upper cover protrusion 22, and can only produce axial displacement, thereby ensuring the stability and precision of the product. In addition, a rotary joint 34, a movable sleeve 38 and a first sealing ring 35 are provided. During the rotation of the adjusting sleeve 4, the movable sleeve 38 may rotate therewith, but the rotary joint 34 will not rotate therewith, and the catheter connected to the liquid outlet connecting pipe 3 will not rotate with the adjusting sleeve 4 after being fixed, which is convenient for the use of the product. By adding the first sealing ring 35 and the second sealing ring 31, liquid leakage is prevented during the use and pressure adjustment process of the present invention.

[0043] The present invention controls the stroke of the spring 17, i.e., the deformation amount x, by adjusting the length of the telescopic cylinder 6 extending out of the adjusting sleeve 4, thereby changing the elastic deformation force F. The spring deformation force F corresponds to the pressure scale on the telescopic cylinder 6, F=kx, wherein k is the stiffness coefficient. The adjustable pressure range of the present invention is 0-40CMH2O. If it is used for urinary tract drainage, the bladder pressure can be controlled. The lower end face of the cover body 5 of the telescopic lower cover is the upper limit end face. When the upper end face of the adjusting sleeve 4 abuts against this end face, the pressure of the pressure-maintaining valve is the maximum value; the lower end face of the upper slider 15 of the slider 7 is the lower limit end face. When the upper end face of the limiting boss 14 of the telescopic cylinder 6 abuts against this end face, the pressure of the pressure-maintaining valve is the minimum value.

[0044] However, the above are only specific embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A pressure-adjustable medical pressure-maintaining valve, comprising an upper cover and a lower cover, wherein the upper cover is provided with a liquid inlet, the lower cover is provided with a liquid outlet, and a driving component for blocking or conducting is provided in a cavity enclosed by the upper cover and the lower cover; wherein: The lower cover comprises a telescopic lower cover and an adjusting sleeve, wherein the telescopic lower cover comprises a cover body connected to the upper cover, and a telescopic cylinder body formed by extending downward from an opening in the middle of the cover body, wherein the telescopic cylinder body is located in the through hole of the adjusting sleeve and can enter and exit the adjusting sleeve; a slider is arranged in the telescopic cylinder body, and the lower end of the driving assembly extends into the through hole of the slider; a partition is arranged in the through hole of the adjusting sleeve, and the middle part of the partition is connected to the slider upward through a push rod, and a bearing is arranged between the push rod and the slider; the partition is provided with a liquid through hole; The telescopic cylinder is connected to the adjusting sleeve by threads, a locking collar is provided on the top of the adjusting sleeve, a locking piece is threadedly connected to a through hole on one side of the locking collar, and an end of the locking piece is in contact with the outer surface of the telescopic cylinder; The bottom of the adjusting sleeve is connected to a bottom cover, and the bottom cover is provided with a bottom cover opening; a rotating joint is sandwiched between the bottom cover and the partition, and the rotating joint is provided with the liquid outlet, and the liquid outlet extends downward to form a liquid outlet pipe extending out of the bottom cover opening; A limiting boss is provided on the inner surface of the bottom of the telescopic cylinder, and the slider is divided into an upper slider part and a lower slider part. The inner diameter of the limiting boss is smaller than the outer diameter of the upper slider part and larger than the inner diameter of the lower slider part. The outer sleeve of the liquid outlet connecting pipe is provided with a movable sleeve, the outer surface of the liquid outlet connecting pipe is provided with a groove, and the inner surface of the movable sleeve is provided with a boss matched with the groove.

2. The adjustable pressure medical pressure-maintaining valve according to claim 1, characterized in that: The driving assembly includes a driving member, a sealing gasket and a spring. The driving member includes a first driving part arranged between the upper cover and the cover body, and a second driving part located in the through hole of the slider. The sealing gasket is arranged on the side of the first driving part facing the upper cover, and the spring is clamped between the second driving part and the slider. The upper cover is provided with an upper cover protrusion for clamping or separating with the sealing gasket.

3. The adjustable pressure medical pressure-maintaining valve according to claim 2, characterized in that: The sealing gasket includes a sealing base arranged in the sealing groove of the first driving part and a raised part protruding from the middle of the sealing base; sealing pressing pieces for squeezing and fixing the sealing base are provided on both the inner and outer sides of the sealing gasket, and a blocking boss is provided at one end of the sealing pressing piece away from the raised part; a plurality of fixing columns are provided at the bottom of the sealing pressing piece, and the first driving part is provided with a fixing hole matching the fixing columns.

4. The adjustable pressure medical pressure-maintaining valve according to claim 1, characterized in that: A first sealing ring is provided between the rotary joint and the partition, and a second sealing ring is provided between the telescopic cylinder and the adjusting sleeve.

5. The adjustable pressure medical pressure-maintaining valve according to claim 2, characterized in that: The cross sections of the slider and the second driving part are both cross-shaped.

6. The adjustable pressure medical pressure-maintaining valve according to claim 1, characterized in that: The outer surface of the telescopic cylinder is provided with pressure scale lines.

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