CN108421117A - Rotary valve and Deep venou flusher including rotary valve - Google Patents

Abstract

The invention provides a rotary valve, which includes a main valve body and a bypass valve body. The wall of the main valve body is provided with a first through hole and a second through hole. The main valve body is provided with a valve ball, a spring, a partition block and a limiting part. , the valve ball is set between the partition block and the limiting part, the partition block is provided with a third through hole, the two ends of the spring are in contact with the limiting part and the valve ball respectively, and the spring supports the valve ball to snap into the third through hole, There is a cavity in the bypass valve body, one end of the main valve body penetrates the bypass valve body from top to bottom, enters the cavity, and then passes through the bypass valve body. The bypass valve body includes the first bypass valve body and the second bypass valve body. Two bypass valve bodies, the first bypass valve body and the second bypass valve body are separated by a rotary switch, the rotary switch is sleeved on the main valve body, the rotary switch includes a first arc ring, the outer wall of the main valve A second arc-shaped ring is arranged against the internal wall. The rotary valve provided by the invention realizes the one-way and two-way flow control of liquid. The invention also provides a deep vein flushing device comprising a rotary valve.

Description

Rotary valve and deep vein irrigation device including rotary valve

technical field

The invention belongs to the field of fluid control valves, in particular to a rotary valve and a deep vein flushing device comprising the rotary valve.

Background technique

In the actual clinical deep vein infusion, in order to prevent the blockage of the infusion pipeline, blood backflow, etc., it is necessary to perform a deep vein pulse tube operation on the patient every four hours. The current operation process: take a brand new pulse empty needle before flushing the tube each time, insert it into the bypass pipe of the infusion line, then close the clamp on the infusion line, at this time operate the pulse infusion set to inhale a certain amount of flushing solution, After inhalation, close the connection channel between the infusion tube and the infusion container, open the tube clamp connected to the patient end, operate the pulse needle to push the flushing fluid into the patient's blood vessel, remove the pulse empty needle after the operation, and open the connection with the infusion bottle The pipeline, start the normal infusion.

A brand new pulse syringe is required for each deep vein flush, which is costly. Every time deep vein flushing needs to be reconnected with a new syringe, the operation is complex, time-consuming and labor-intensive. Every time the deep vein flushing is carried out, the new syringe is in contact with the air, which is easily polluted, and aseptic operation cannot be fully realized.

Contents of the invention

The object of the present invention is to provide a rotary valve with reasonable structure, which can realize the single- and two-way flow control of liquid. The invention also provides a deep vein flushing device, which realizes repeated use of the syringe without dismantling; realizes no need to connect the syringe during each flushing, reduces work intensity; prevents contact with external air, and completely avoids contamination of the syringe.

The invention provides a rotary valve, which includes a main valve body and a bypass valve body, the wall of the main valve body is provided with a first through hole and a second through hole, and the main valve body is provided with a valve ball, a spring, a partition Block and limit part, the valve ball is arranged between the partition block and the limit part, the partition block is provided with a third through hole, the diameter of the third through hole is smaller than the diameter of the valve ball, the spring The two ends are in contact with the limit part and the valve ball respectively, and the spring-supported valve ball is snapped into the third through hole,

A cavity is provided in the bypass valve body, one end of the main valve body penetrates the bypass valve body from top to bottom, enters the cavity, and then passes out of the bypass valve body, the bypass valve body includes The first bypass valve body and the second bypass valve body, the length direction of the first bypass valve body connecting the second bypass valve body is consistent with the penetration direction of one end of the main valve body, the first bypass valve body The valve body and the second bypass valve body are separated by a rotary switch, the rotary switch is sleeved on the main valve body, and the rotary switch includes a first arc-shaped ring, and the first arc-shaped ring is located between the outer wall of the main valve body and the bypass valve body. Between the inner wall of the main valve and the inner wall of the bypass valve, there is a second arc-shaped ring that is pressed against the inner wall of the bypass valve. The width of the first arc-shaped ring is equal to the width of the second arc-shaped ring, so The first arc-shaped ring and the second arc-shaped ring abut up and down, the sum of the inner edge arc lengths of the first arc-shaped ring and the second arc-shaped ring is greater than the outer circumference of the main valve body, and the first arc-shaped ring and the second arc-shaped ring The arc length of the inner edge of the second arc ring is smaller than the outer perimeter of the main valve body,

The first through hole and the second through hole are respectively arranged at two ends of the rotary switch, and both the first through hole and the second through hole can make the inner cavity of the main valve body communicate with the cavity of the bypass valve body.

When realizing the one-way flow control of the liquid, adjust the rotary switch to reduce the overlap between the first arc-shaped ring and the second arc-shaped ring, so that both ends of the first arc-shaped ring intersect with the two ends of the second arc-shaped ring . That is to say, the space between the outer wall of the main valve and the inner wall of the bypass valve is completely blocked into two spaces by the first arc ring and the second arc ring, and the liquid can only pass through the third through hole. Moreover, since the spring-supported valve ball is clamped to the third through hole, the liquid can only flow from the upper end to the lower end.

When realizing the two-way flow control of the liquid, adjust the rotary switch to increase the overlapping portion of the first arc-shaped ring and the second arc-shaped ring, so that one of the two ends of the first arc-shaped ring intersects with one end of the second arc-shaped ring , the other end of which does not intersect the other end of the second arc-shaped ring. That is to say, the space between the outer wall of the main valve and the inner wall of the bypass valve is a space, which is not completely blocked into two spaces by the first arc ring and the second arc ring, and the liquid can pass through the third through hole. pass through, and also pass through the first through hole and the second through hole.

Under normal conditions of liquid pressure, the spring is in a compressed state, and the elastic force of the spring supports the valve ball, so that the valve ball is clamped against the third through hole. The partition block is used to block the liquid. At this time, the liquid cannot pass through the third through hole. pass. The fact that the liquid can pass through the third through hole means that the pressure of the liquid pushes the valve ball to move, thereby compressing the spring, and the liquid can enter the end of the spring through the third through hole.

Further, the rotary switch includes an inner ring, the inner ring is sheathed on the main valve body, and the inner ring is vertically connected to the first arc ring.

Further, the rotary switch also includes an outer ring, the outer ring is connected to the first arc ring through a connecting ring, the outer ring is perpendicular to the connecting ring, and the upper and lower ends of the connecting ring are respectively connected to the first bypass valve. body abuts against the second bypass valve body.

Further, a sealing ring is provided between the connecting ring and the second bypass valve body.

The present invention also provides a deep vein flushing device, which includes the rotary valve, and the number of the rotary valves is two. The deep vein flushing device also includes an infusion tube and a sealed bag, and the two ends of the infusion tube are respectively An infusion bottle and a needle are provided, and two rotary valves are arranged on the infusion tube. The infusion tube section between the two rotary valves is connected with a branch pipe, and the branch pipe is connected with the nozzle of the syringe. The sealed bag seals the piston rod of the syringe. Sealed to the barrel of the syringe.

When operating the deep static pulse tube, turn the two rotary valves to switch the two rotary valves to the one-way flow state, that is, the liquid can flow from the infusion bottle to the two rotary valves and the needle. The liquid in the infusion bottle flows to the branch tube, and the syringe is operated to inhale the flushing liquid. When the syringe is withdrawn, it will not cause backflow of fluid and blood at the patient end, so there is no need to close the flow regulator. After the extraction is completed, operate the syringe to push in the flushing liquid. At this time, because the connection end with the infusion container is in a one-way state, the flushing liquid will not be pushed into the infusion bottle when the liquid is pushed in, and the flushing liquid will be directly pushed into the patient's blood vessel to complete flushing.

The invention realizes that the syringe does not need to be disassembled and can be reused; when flushing each time, it does not need to connect the syringe, which reduces the work intensity; it prevents the contact with the outside air and completely avoids the syringe from being polluted.

Further, the deep vein flushing device also includes a flow rate regulator, the two rotary valves are respectively a first rotary valve and a second rotary valve, the second rotary valve is closer to the needle than the first rotary valve, and the The flow rate regulator is located on the infusion tube between the second rotary valve and the needle.

Due to the adoption of the above technical solution, the rotary valve provided by the present invention has the advantage of reasonable structure and realizes the single- and bi-directional flow control of liquid. The invention also provides a deep vein flushing device, which realizes repeated use of the syringe without dismantling; realizes no need to connect the syringe during each flushing, reduces work intensity; prevents contact with external air, and completely avoids contamination of the syringe.

Description of drawings

Figure 1 is a partial sectional view of a rotary valve.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic diagram of the structure of the deep vein flushing device.

In the figure: 1. Main valve body; 2. Bypass valve body; 3. First through hole; 4. Second through hole; 5. Valve ball; 6. Spring; 7. Partition block; 8. Limiting part; 9. The third through hole; 10. The cavity; 11. The first bypass valve body; 12. The second bypass valve body; 13. The rotary switch; 14. The first arc ring; 15. The second arc ring ;16, inner ring; 17, outer ring; 18, connecting ring; 19, sealing ring; 20, infusion tube; 21, sealing bag; 22, infusion bottle; 23, needle; 24, branch tube; 25, syringe; 26 , piston rod; 27, barrel; 28, flow rate regulator; 29, first rotary valve; 30, second rotary valve

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the present invention provides a rotary valve, which includes a main valve body 1 and a bypass valve body 2, the wall of the main valve body 1 is provided with a first through hole 3 and a second through hole 4, The main valve body 1 is provided with a valve ball 5, a spring 6, a partition block 7 and a limiting part 8, the valve ball 5 is arranged between the partition block 7 and the limiting part 8, and the partition block 7 is provided with The third through hole 9, the diameter of the third through hole 9 is smaller than the diameter of the valve ball 5, the two ends of the spring 6 respectively abut against the stopper 8 and the valve ball 5, and the spring 6 supports the valve ball 5 snapped into the third through hole 9,

The bypass valve body 2 is provided with a cavity 10, one end of the main valve body 1 penetrates the bypass valve body 2 from top to bottom, enters the cavity 10, and then passes through the bypass valve body 2, The bypass valve body 2 includes a first bypass valve body 11 and a second bypass valve body 12, the first bypass valve body 11 connects the length direction of the second bypass valve body 12 with the main valve body 1 The penetration direction of one end is consistent, the first bypass valve body 11 and the second bypass valve body 12 are separated by the rotary switch 13, and the rotary switch 13 is sleeved on the main valve body 1, and the rotary switch 13 includes the first An arc-shaped ring 14, the first arc-shaped ring 14 is located between the outer wall of the main valve body 1 and the inner wall of the bypass valve body 2, and the outer wall of the main valve body 1 and the inner wall of the bypass valve body 2 are tightly arranged The second arc ring 15, the width of the first arc ring 14 is equal to the width of the second arc ring 15, the first arc ring 14 abuts against the second arc ring 15 up and down, the first arc ring The sum of the inner edge arc lengths of the ring 14 and the second arc ring 15 is greater than the outer circumference of the main valve body 1, and the inner edge arc lengths of the first arc ring 14 and the second arc ring 15 are both smaller than the main valve body the outer perimeter of 1,

The first through hole 3 and the second through hole 4 are respectively arranged at the two ends of the rotary switch 13, and the first through hole 3 and the second through hole 4 can make the inner cavity of the main valve body 1 and the bypass valve The cavity 10 of the body 2 communicates.

When realizing the one-way flow control of the liquid, adjust the rotary switch 13 to reduce the overlap between the first arc ring 14 and the second arc ring 15, so that both ends of the first arc ring 14 are aligned with the second arc ring. The two ends of 15 intersect. That is to say, the space between the outer wall of the main valve body 1 and the inner wall of the bypass valve body 2 is completely blocked into two spaces by the first arc ring 14 and the second arc ring 15, and the liquid can only flow through the third through hole 9. pass. Moreover, since the spring 6 supports the valve ball 5 and is engaged with the third through hole 9, the liquid can only flow from the upper end to the lower end.

When realizing the two-way flow control of the liquid, adjust the rotary switch 13 to increase the overlap between the first arc ring 14 and the second arc ring 15, so that among the two ends of the first arc ring 14, one end is connected to the second arc ring. One end of the ring 15 intersects, and the other end does not intersect with the other end of the second arc ring 15 . That is to say, the space between the outer wall of the main valve body 1 and the inner wall of the bypass valve body 2 is a space, which is not completely blocked into two spaces by the first arc ring 14 and the second arc ring 15, and the liquid can flow from The third through hole 9 passes through, and may also pass through the first through hole 3 and the second through hole 4 .

When the liquid pressure is normal, the spring 6 is in a compressed state, and the elastic force of the spring 6 supports the valve ball 5, so that the valve ball 5 is clamped against the third through hole 9, and the partition block 7 is used to block the liquid. At this time, the liquid It cannot pass through the third through hole 9 . Liquid can pass through the third through hole 9 means that the pressure of the liquid pushes the valve ball 5 to move, thereby compressing the spring 6 , and the liquid can enter the end of the spring 6 from the third through hole 9 .

As shown in FIG. 1 , the limiting portion 8 limits the lower end of the spring 6 .

As shown in FIGS. 1 and 2 , the rotary switch 13 includes an inner ring 16 sleeved on the main valve body 1 , and the inner ring 16 is vertically connected to the first arc ring 14 .

As shown in Figures 1 and 2, the rotary switch 13 also includes an outer ring 17, the outer ring 17 is connected to the first arc ring 14 through a connecting ring 18, the outer ring 17 is perpendicular to the connecting ring 18, and the outer ring 17 is perpendicular to the connecting ring 18. The upper and lower ends of the connecting ring 18 abut against the first bypass valve body 11 and the second bypass valve body 12 respectively.

As shown in FIGS. 1 and 2 , in order to enhance the sealing effect, a sealing ring 19 is provided between the connecting ring 18 and the second bypass valve body 12 .

As shown in Figure 3, the present invention also provides a deep vein flushing device, which includes the rotary valve, the number of the rotary valves is two, and the deep vein flushing device also includes a transfusion tube 20 and a sealed bag 21, The two ends of described infusion tube 20 are respectively provided with infusion bottle 22 and needle 23, and two rotary valves are arranged on the infusion tube 20, and the transfusion tube 20 section between two rotary valves is connected with branch pipe 24, and described branch pipe 24 is connected with the nozzle of the syringe 25, and the sealing bag 21 seals the piston rod 26 of the syringe 25 to the barrel 27 of the syringe 25.

When operating the deep static pulse tube, turn the two rotary valves to switch the two rotary valves to the one-way flow state, that is, the liquid can flow from the infusion bottle 22 to the two rotary valves and the needle 23. The liquid in the infusion bottle 22 flows to the branch pipe 24, and the syringe 25 is operated to inhale the flushing liquid. When the syringe 25 is withdrawn, it will not cause backflow of liquid and blood at the patient end, so there is no need to close the flow regulator. After the extraction is completed, operate the syringe 25 to push in the flushing liquid. At this time, because the connection end with the infusion container is in a one-way state, the flushing liquid will not be pushed into the infusion bottle 22 when the liquid is pushed in, and the flushing liquid is directly pushed into the patient's blood vessel, and the rinse.

The present invention realizes that the syringe 25 can be reused without disassembly; when flushing each time, the syringe 25 does not need to be connected, reducing work intensity; contact with the outside air is prevented, and the syringe 25 is completely avoided from being polluted.

As shown in Figure 3, the deep vein flushing device also includes a flow rate regulator 28, and the two rotary valves are respectively a first rotary valve 29 and a second rotary valve 30, and the second rotary valve 30 is opposite to the first rotary valve. The rotary valve 29 is closer to the needle 23 , and the flow rate regulator 28 is located on the infusion tube 20 between the second rotary valve 30 and the needle 23 .

The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structures made using the description of the present invention and the contents of the accompanying drawings are directly or indirectly used in other related technical fields, and are equally applicable to the present invention. within the scope of patent protection.

Claims (6)

1. The rotary valve is characterized in that it comprises a main valve body and a bypass valve body, the wall of the main valve body is provided with a first through hole and a second through hole, and the main valve body is provided with a valve ball, a spring, a partition Block and limit part, the valve ball is arranged between the partition block and the limit part, the partition block is provided with a third through hole, the diameter of the third through hole is smaller than the diameter of the valve ball, the spring The two ends are in contact with the limit part and the valve ball respectively, and the spring-supported valve ball is snapped into the third through hole, A cavity is provided in the bypass valve body, one end of the main valve body penetrates the bypass valve body from top to bottom, enters the cavity, and then passes out of the bypass valve body, the bypass valve body includes The first bypass valve body and the second bypass valve body, the length direction of the first bypass valve body connecting the second bypass valve body is consistent with the penetration direction of one end of the main valve body, the first bypass valve body The valve body and the second bypass valve body are separated by a rotary switch, the rotary switch is sleeved on the main valve body, and the rotary switch includes a first arc-shaped ring, and the first arc-shaped ring is located between the outer wall of the main valve body and the bypass valve body. Between the inner wall of the main valve and the inner wall of the bypass valve, there is a second arc-shaped ring that is pressed against the inner wall of the bypass valve. The width of the first arc-shaped ring is equal to the width of the second arc-shaped ring, so The first arc-shaped ring and the second arc-shaped ring abut up and down, the sum of the inner edge arc lengths of the first arc-shaped ring and the second arc-shaped ring is greater than the outer circumference of the main valve body, and the first arc-shaped ring and the second arc-shaped ring The arc length of the inner edge of the second arc ring is smaller than the outer perimeter of the main valve body, The first through hole and the second through hole are respectively arranged at two ends of the rotary switch, and both the first through hole and the second through hole can make the inner cavity of the main valve body communicate with the cavity of the bypass valve body. 2. The rotary valve according to claim 1, wherein the rotary switch comprises an inner ring, the inner ring is sleeved on the main valve body, and the inner ring is vertically connected to the first arc ring. 3. The rotary valve according to claim 1, wherein the rotary switch further comprises an outer ring, the outer ring is connected to the first arc-shaped ring through a connecting ring, the outer ring is perpendicular to the connecting ring, and the outer ring is perpendicular to the connecting ring. The upper and lower ends of the connecting ring abut against the first bypass valve body and the second bypass valve body respectively. 4. The rotary valve according to claim 3, wherein a sealing ring is provided between the connecting ring and the second bypass valve body. 5. The deep vein flushing device is characterized in that, comprising the rotary valve described in any one of claims 1-3, the number of the rotary valves is two, and the deep vein flushing device also includes an infusion tube and a sealed bag , the two ends of the infusion tube are respectively provided with an infusion bottle and a needle, two rotary valves are arranged on the infusion tube, the infusion tube section between the two rotary valves is connected with a branch pipe, and the branch pipe is connected with the nozzle of the syringe, The sealing bag seals the piston rod of the syringe to the barrel of the syringe. 6. The deep vein flushing device according to claim 5, characterized in that, the deep vein flushing device also includes a flow rate regulator, and the two rotary valves are respectively a first rotary valve and a second rotary valve, and the The second rotary valve is closer to the needle than the first rotary valve, and the flow rate regulator is located on the infusion tube between the second rotary valve and the needle.