Dead-cavity-free multi-path liquid control valve

Abstract

The utility model discloses a multi-way liquid control valve without a dead cavity, which comprises a valve body and a reversing valve core, the valve body is provided with a main passage, a first passage and a second passage, and the reversing valve core is arranged on the valve body in a single-degree-of-freedom sliding manner, so that the first passage is communicated with the main passage or the second passage; according to the dead-cavity-free multi-path liquid control valve, the first path and the main path or the second path are communicated at will through the sliding reversing valve element, when the dead-cavity-free multi-path liquid control valve is used, the first path and the second path are connected to a dialysis machine, the main path is connected into dialysis liquid (liquid A or liquid B), and when the dialysis machine needs to take liquid, the first path and the main path are communicated; when the dialysis machine does not need to take liquid, the first channel and the second channel are communicated through the reversing valve element, self-circulation in the dialysis machine is formed, dead space is effectively avoided, flexible switching between a single-machine treatment state and a concentrated liquid supply state of any dialysis machine in the whole system can be achieved, concentrated liquid supply can be achieved, dialysis prescriptions can be individually adjusted, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical equipment, and relates to a dead space free multi-path liquid control valve. BACKGROUND

[0002] A hemodialysis device is a medical device for purifying blood by removing various harmful and metabolic waste and excessive water from the blood of a patient and performing solute exchange using the principle of a semi-permeable membrane, diffusion, convection, filtration, etc., so that the internal environment of the patient's body approaches that of a normal person.

[0003] The existing control valve is a communication valve that can control opening and closing, that is, the valve is opened when liquid is needed, and the valve is closed when work is not needed.

[0004] To solve the above problems, a control valve is needed that can control the liquid taking of a dialysis machine without causing a dead space and avoiding the risk of bacterial growth. INVENTION CONTENTS

[0005] Therefore, the utility model provides a dead space free multi-path liquid control valve, which realizes the arbitrary communication of a first path with a main path or a second path through a sliding reversing valve core, connects the first path and the second path to the dialysis machine during use, connects the main path to dialysis liquid (A liquid or B liquid), and communicates the first path with the main path when the dialysis machine needs to take liquid.

[0006] The utility model discloses a dead space free multi-path liquid control valve, including valve body and reversing valve core, the valve body is provided with main path, first path and second path, the reversing valve core single degree of freedom is slid and is arranged in the valve body, so that the first path is communicated with main path or second path.

[0007] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0008] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0009] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0010] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0011] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0012] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0013] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0014] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0015] Further, the valve body is provided with a sliding groove, the reversing spool is provided with a liquid changing cavity, the main passage, the first passage and the second passage are communicated with the groove bottom of the sliding groove, the reversing spool is slidably arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity communicates the first passage with the main passage or the second passage.

[0016] The utility model discloses beneficial effect:

[0017] The utility model provides a kind of dead cavity-free multi-path liquid control valve, arbitrary intercommunication of first passage and main passage or second passage is realized by a sliding reversing valve core, first passage and second passage are connected to dialysis machine when using, main passage is connected in dialysis fluid (A liquid or B liquid), dialysis machine needs to take liquid when intercommunication first passage and main passage;When dialysis machine does not need to take liquid, then first passage and second passage are interconnected by reversing valve core, form a self-circulation inside dialysis machine, effectively avoid dead cavity, and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the installation structure schematic diagram of the utility model;

[0019] Figure 2 It is the assembly structure schematic diagram of the valve body and reversing valve core of the utility model;

[0020] Figure 3 It is the assembly structure front view of the valve body and reversing valve core of the utility model;

[0021] Figure 4 It is the valve body structure schematic diagram of the utility model;

[0022] Figure 5 It is the structure schematic diagram of the reversing valve core of the utility model;

[0023] Figure 6 It is the structure schematic diagram of the fixed seat of the utility model;

[0024] Figure 7 It is the structure schematic diagram of the rotary cover of the utility model. DETAILED DESCRIPTION

[0025] It should be noted that, in the description of the present application, the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] As shown in the figure, the utility model discloses a kind of dead spaceless multi-path liquid control valve, including valve body 1 and reversing valve core 2, the valve body 1 is provided with main passage 6, first passage 7 and second passage 8, the reversing valve core single degree of freedom is slidably arranged in the valve body 1, to make the first passage 7 with main passage 6 or second passage 8 communication. In the embodiment, first passage 7 and second passage 8 are connected to dialysis machine, and main passage 6 is connected to dialysis fluid (A liquid or B liquid). By driving the sliding of reversing valve core, the first passage 7 is communicated with one of main passage 6 or second passage 8. When dialysis machine needs to take liquid, first passage 7 is communicated with main passage 6. When dialysis machine does not need to take liquid, first passage 7 is communicated with second passage 8 by reversing valve core, so that A liquid or B liquid suction channel restores original passage of dialysis machine. It is convenient to realize individualized treatment or disinfection of dialysis machine under non-central liquid supply state, avoid the formation of dead space after traditional valve is closed and directly stop flowing, and it is safer and more convenient to use.

[0027] In the embodiment, the valve body 1 is provided with a sliding groove 101, the reversing valve core is provided with a liquid exchange cavity 201, the main passage 6, the first passage 7 and the second passage 8 are all communicated with the groove bottom of the sliding groove 101, the reversing valve core is slidably arranged in the sliding groove 101 with the liquid exchange cavity 201 facing the groove bottom of the sliding groove 101, and the liquid exchange cavity 201 communicates the first passage 7 with the main passage 6 or the second passage 8. The main passage 6 and the second passage 8 are respectively arranged on the two sides of the first passage 7 along the sliding direction of the reversing valve core. In this way, the reversing valve core only needs to slide in one degree of freedom to realize the switching of communication between different passages.

[0028] In the embodiment, the groove bottom of the chute 101 is provided with a communication port I 102 communicating with the main passage 6, a communication port II 103 communicating with the first passage 7, and a communication port III 104 communicating with the second passage 8, that is, the main passage 6, the first passage 7 and the second passage 8 are communicated with the groove bottom of the chute 101 through the communication port I 102, the communication port II 103 and the communication port III 104 respectively, the position of each communication port is set corresponding to each passage, and the three communication ports are also set along the sliding direction of the reversing valve core; along the sliding direction of the reversing valve core, the distance from the communication port I 102 to the communication port II 103 is equal to the distance from the communication port III 104 to the communication port II 103, and is equal to the length of the liquid changing cavity 201. In the embodiment, the liquid changing cavity 201 is a waist round hole, the length of the liquid changing cavity 201 is the distance between the centers of the two semicircles of the waist round hole, the distance between the communication ports refers to the distance between the centers of the communication ports, the diameters of the communication ports in the embodiment are the same, and are also the same as the diameter of the semicircle part of the waist round hole. By setting the distance from the communication port I 102 to the communication port II 103, the distance from the communication port III 104 to the communication port II 103 and the length of the liquid changing cavity 201 to be the same, it can be ensured that the first passage 7 can only be communicated with one of the main passage 6 or the second passage 8, and the other one is completely cut off without dead space. The groove bottom of the chute 101 and the liquid changing cavity 201 of the reversing valve core 2 are smooth mirror planes on one side, which improves the sealing property of the lifting device and avoids liquid leakage.

[0029] The embodiment further comprises a tensioning drum 3 and a pulling handle 5, the tensioning drum 3 is provided with a tensioning rope 4, the tensioning rope 4 and the pulling handle 5 are respectively arranged at two ends of the sliding direction of the reversing spool. The tensioning rope 4 is connected to the end of the reversing spool close to the main passage 6, and the pulling handle 5 is connected to the end of the reversing spool close to the second passage 8. In the embodiment, the tensioning drum 3 comprises a fixed seat 301 and a rotating shell 302, the rotating shell 302 is rotatably installed on the fixed seat 301, and the tensioning rope 4 is connected to the rotating shell 302. The tensioning rope 4 has a pre-tightening force I that makes the reversing spool away from the communication port III 104. The embodiment further comprises a limiting groove 9 for limiting the position of the pulling handle 5, the pulling handle 5 comprises a handle 501 and a pulling rope 502, the limiting groove 9 is arranged at the end of the reversing spool corresponding to the position of the pulling handle 5, the handle 501 is clamped and limited in the limiting groove 9, and the handle 501 is connected to the reversing spool through the pulling rope 502, and the pulling rope 502 has an elastic force that makes the reversing spool away from the communication port I 102. As shown in the figure, the tensioning rope 4 in the embodiment is not directly connected to the reversing spool, but is connected through an intermediate connecting piece 10. In actual use, considering that the tensioning rope 4 is frequently operated and may need to pass through the wall or the cabinet body, in order to reduce the wear of the tensioning rope 4, the intermediate connecting piece 10 is arranged, which can be a sliding sleeve or other components. The sliding sleeve is arranged through the wall, and the sliding part in the sliding sleeve can be connected to the reversing spool and the tensioning rope 4. This arrangement can effectively improve the service life of the tensioning rope 4. The fixed seat 301 has an annular cavity, the rotating shell 302 has a semicircular protrusion, one end of the tensioning rope 4 is arranged in the cavity of the fixed seat 301 and connected to the semicircular protrusion of the rotating shell 302, and the rotating shell 302 is rotated, the tensioning rope 4 is rotated and tightened, thereby pulling the reversing spool to slide, and connecting the first passage 7 and the main passage 6, so that the first passage 7 is always pulled after the two passages are connected, and the stability of the connection between the two passages is ensured. Reverse rotation of the rotating shell 302 releases the tensioning rope 4, and the reversing spool reversely slides under the elastic force of the pulling rope 502, so that the first passage 7 is disconnected from the main passage 6, the first passage 7 is connected to the second passage 8, and self-circulation is realized. The pulling rope 502 of the embodiment is an elastic rope, and the elastic force is the elastic force of the rope itself.

[0030] In the embodiment, the valve body 1 is provided with two, and the two valve bodies 1 are provided in a way that the liquid exchange cavities 201 are opposite. In the embodiment, the surface of the reversing valve core is inwardly recessed to form the liquid exchange cavity 201, and the reversing valve core is provided with two liquid exchange cavities 201 corresponding to the positions of the sliding grooves 101 of the two valve bodies 1. As shown in the figure, the liquid exchange cavities 201 of the two valve bodies 1 are provided face to face, so that the communication state of two different flow paths can be simultaneously controlled by one valve core, the liquid taking work of two kinds of liquids A and B can be simultaneously carried out by one valve, and the overall structure is simple, efficient and convenient to operate.

[0031] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A dead space free multi-way liquid control valve characterized by: The valve body is provided with a main passage, a first passage and a second passage, and the reversing valve core is single degree of freedom slidingly arranged in the valve body to make the first passage communicate with the main passage or the second passage.

2. The dead space free multi-way liquid control valve according to claim 1, characterized in that: The valve body is provided with a sliding groove, and the reversing valve core is provided with a liquid changing cavity, the main passage, the first passage and the second passage all communicate with the groove bottom of the sliding groove, and the reversing valve core is slidingly arranged in the sliding groove with the liquid changing cavity facing the groove bottom of the sliding groove, and the liquid changing cavity makes the first passage communicate with the main passage or the second passage.

3. The dead space free multi-way liquid control valve according to claim 2, characterized in that: The tensioning drum is provided with a tensioning rope, and the tensioning rope and the pulling handle are respectively connected to the reversing valve core.

4. The dead space free multi-way liquid control valve according to claim 3, characterized in that: The main passage and the second passage are respectively arranged on both sides of the first passage along the sliding direction of the reversing valve core, the tensioning rope is connected to the end of the reversing valve core close to the main passage, and the pulling handle is connected to the end of the reversing valve core close to the second passage.

5. The dead space free multiple fluid control valve of claim 3, wherein: The groove bottom of the sliding groove is provided with a communication port I communicating with the main passage, a communication port II communicating with the first passage and a communication port III communicating with the second passage.

6. The dead space free multi-way liquid control valve according to claim 5, characterized in that: Along the sliding direction of the reversing valve core, the distance from the communication port I to the communication port II is equal to the distance from the communication port III to the communication port II, and is equal to the length of the liquid changing cavity.

7. The dead space free multiple fluid control valve of claim 2, wherein: The valve body is provided with two valve bodies, and the two valve bodies are arranged with the liquid changing cavities opposite to each other.

8. The dead space free multi-way liquid control valve according to claim 7, characterized in that: The surface of the reversing valve core is inwardly recessed to form the liquid changing cavity, and the reversing valve core is provided with two liquid changing cavities corresponding to the positions of the sliding grooves of the two valve bodies.

9. The dead space free multiple fluid control valve of claim 5, wherein: The reversing valve core is provided with a limiting groove for limiting the pulling handle, the pulling handle comprises a handle and a pulling rope, the limiting groove is arranged at the end of the reversing valve core corresponding to the position of the pulling handle, the handle is clamped and limited in the limiting groove, the handle is connected to the reversing valve core through the pulling rope, and the pulling rope has an elastic force for making the reversing valve core away from the communication port I.

10. The dead space free multiple fluid control valve of claim 3, wherein: The tensioning drum comprises a fixed seat and a rotating shell, the rotating shell is rotatably installed on the fixed seat, and the tensioning rope is connected to the rotating shell.

Images