Heat exchange device for hemodialysis machine

Abstract

The utility model relates to the technical field of hemodialysis machines, in particular to a heat exchange device for a hemodialysis machine, which comprises a shell, end covers and a support rod, steps are arranged on the inner walls of the opening ends of the end covers, two ends of the shell respectively extend into the steps of the two groups of end covers, the shell and the end covers are connected through threads for installation, and the support rod is connected with the shell. A first gasket groove is formed in the step of the end cover, the first gasket groove is of an annular groove body structure, a first gasket is arranged in the first gasket groove, and the end, extending out of the first gasket groove, of the first gasket abuts against a port of the shell; the device has the beneficial effects that penetrating fluid can be prevented from leaking from the joint of the shell and the end cover, and the shell and the end cover can be detached, so that the shell and the end cover can be detached conveniently, a capillary tube mounted on the supporting rod can be overhauled after being detached, the capillary tube is prevented from leaking, and the service life of the capillary tube is prolonged. The harm to the health of a patient is avoided; meanwhile, the service life of the heat exchange device for the hemodialysis machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hemodialysis machines, in particular to a heat exchange device used for a hemodialysis machine. Background Art

[0002] The hemodialysis machine is a complex medical device that integrates multiple technologies such as water, electricity, and machinery. It is mainly used for hemodialysis treatment. Hemodialysis is a treatment method that extracts blood from the body, passes it through the permeable membrane of the hemodialysis machine, removes metabolic waste and impurities in the blood, and then returns the purified blood to the body. When the blood is returned to the patient, in order to avoid causing discomfort to the patient, the blood is often heated to close to body temperature before being returned to the patient.

[0003] In the prior art, blood is usually heated by a heat exchange device, which is composed of an outer shell, an end cover, a capillary, a support frame, etc. The capillary is installed on the support frame, and both ends of the support frame are installed on the end cover. A pipe is provided on the end cover, and a heat exchange fluid with a suitable temperature is introduced into the heat exchange device through the pipe to completely cover the capillary, so that the temperature in the heat exchange fluid exchanges heat with the blood in the capillary. The end cover and the outer shell are usually welded to prevent leakage of the heat exchange fluid.

[0004] However, the welding installation form between the end cover and the outer shell in the prior art makes it impossible to inspect and repair the capillary installed inside the support frame. Once the capillary leaks, on the one hand, the dialysate may seep into the capillary and be input into the patient's body together with the blood therein, causing serious harm to the patient's health. On the other hand, it also means that the heat exchange device used in the hemodialysis machine can no longer be used. Utility Model Content

[0005] The purpose of the utility model is to provide a heat exchange device for a hemodialysis machine to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat exchange device for a hemodialysis machine, comprising: an outer shell, an end cover and a support rod, wherein two groups of end covers are provided, the two groups of end covers are installed at the two ends of the outer shell, a support rod is provided between the two groups of end covers, the support rod is provided in the outer shell, a step is provided on the inner wall of the open end of the end cover, the two ends of the outer shell respectively extend into the steps of the two groups of end covers, the outer shell and the end cover are installed by a threaded connection, a first gasket groove is provided on the step of the end cover, the first gasket groove is in an annular groove structure, a first gasket is provided in the first gasket groove, and one end of the first gasket extending out of the first gasket groove is against the port of the outer shell.

[0007] Preferably, an extension sleeve is provided on the surface of the end cover, the extension sleeve is an annular cylindrical structure, the extension sleeve is provided on the surface of the outer shell, end cover fixing screw holes are provided at positions corresponding to the extension sleeve and the outer shell, and end cover fixing bolts are provided in the end cover fixing screw holes through threaded connection.

[0008] Preferably, a caliper opening is formed on the surface of the end cover, the caliper opening is in the form of a circular groove, and two groups of caliper openings are provided, and the two groups of caliper openings are symmetrically distributed about the axis of the end cover.

[0009] Preferably, support rod mounting screw holes are provided at both ends of the support rod and at positions corresponding to the two sets of end covers, and support rod mounting screws are provided in the support rod mounting screw holes through threaded connection.

[0010] Preferably, both ends of the support rod are provided with a second gasket groove, the second gasket groove is an annular groove structure, a second gasket is arranged in the second gasket groove, and one end of the second gasket extends out of the second gasket groove and abuts against the inner wall of the end cover.

[0011] Preferably, a plurality of groups of limit rods are arranged on the surface of the shell, the limit rods are movably inserted in the limit grooves, the limit grooves are opened on the surface of the limit seat, the limit seat is composed of two parts spliced ​​together, the two parts of the limit seat are symmetrically distributed about the shell, and screw holes are opened on the surface of the limit seat.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a heat exchange device for a hemodialysis machine, wherein an end cover and a shell are connected by threads, and a step is arranged on the inner wall of the end cover, the shell extends into the step of the end cover, a first gasket groove is also provided on the step of the end cover, a first gasket is arranged in the first gasket groove, and a gap between the shell and the end cover is blocked by the step and the first gasket groove, thereby achieving the purpose of preventing the leakage of the permeate from the connection between the shell and the end cover and making the shell and the end cover detachable, thereby facilitating the disassembly of the shell and the end cover, and after disassembly, the capillary installed on the support rod can be inspected and repaired to prevent the capillary from leaking, thereby avoiding harm to the health of the patient and prolonging the service life of the heat exchange device for the hemodialysis machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0017] Figure 4 It is a schematic diagram of the limit seat structure.

[0018] In the figure: housing 1, end cover 2, caliper mouth 3, support rod 4, support rod mounting screw hole 5, support rod mounting screw 6, extension sleeve 7, end cover fixing screw hole 8, end cover fixing bolt 9, first gasket groove 10, first gasket 11, second gasket groove 12, second gasket 13, limit seat 14, limit groove 15, limit rod 16, screw hole 17. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] See also Figures 1 to 3 The utility model provides a technical solution: a heat exchange device for a hemodialysis machine, comprising: a shell 1, an end cover 2 and a support rod 4, the end cover 2 is provided with two groups, the two groups of end covers 2 are installed at both ends of the shell 1, a support rod 4 is arranged between the two groups of end covers 2, the support rod 4 is arranged in the shell 1, a step is arranged on the inner wall of the open end of the end cover 2, the two ends of the shell 1 respectively extend into the steps of the two groups of end covers 2, the shell 1 and the end cover 2 are installed by threaded connection, a first gasket groove 10 is opened on the step of the end cover 2, the first gasket groove 10 is an annular groove structure, a first gasket 11 is arranged in the first gasket groove 10, and one end of the first gasket 11 extending out of the first gasket groove 10 is against the port of the shell 1.

[0022] In actual use, the heat exchange device for a hemodialysis machine proposed by the utility model has a threaded connection between the end cover 2 and the outer shell 1, and a step is provided on the inner wall of the end cover 2, the outer shell 1 extends into the step of the end cover 2, and a first gasket groove 10 is also provided on the step of the end cover 2, and a first gasket 11 is provided in the first gasket groove 10. The gap between the outer shell 1 and the end cover 2 is blocked by the step and the first gasket groove 10, thereby achieving the purpose of preventing the permeate from leaking from the connection between the outer shell 1 and the end cover 2 and making the outer shell 1 and the end cover 2 disassembled, thereby facilitating the disassembly of the outer shell 1 and the end cover 2. After disassembly, the capillary installed on the support rod 4 can be inspected and repaired to prevent the capillary from leaking, avoiding harm to the patient's health and extending the service life of the heat exchange device for the hemodialysis machine.

[0023] Embodiment 2

[0024] On the basis of Example 1, in order to prevent the threaded connection between the outer shell 1 and the end cover 2 from loosening, an extension sleeve 7 is provided on the surface of the end cover 2. The extension sleeve 7 is an annular cylindrical structure and is sleeved on the surface of the outer shell 1. End cover fixing screw holes 8 are provided at positions corresponding to the extension sleeve 7 and the outer shell 1, and end cover fixing bolts 9 are provided in the end cover fixing screw holes 8 through threaded connection.

[0025] An extension sleeve 7 is provided on the surface of the end cover 2. When the threaded connection between the end cover 2 and the outer shell 1 is tightened, the end cover fixing screw hole 8 opened on the surface of the extension sleeve 7 is aligned with the end cover fixing screw hole 8 opened on the surface of the outer shell 1, and then the end cover fixing bolt 9 is screwed in the end cover fixing screw hole 8 through the threaded connection. The end cover fixing bolt 9 prevents the outer shell 1 and the end cover 2 from rotating relative to each other, and also prevents the threaded connection between the outer shell 1 and the end cover 2 from loosening.

[0026] Embodiment 3

[0027] On the basis of Example 2, in order to facilitate the disassembly of the outer shell 1 and the end cover 2, a step is provided on the inner wall of the open end of the end cover 2, and the two ends of the outer shell 1 respectively extend into the steps of the two groups of end covers 2, and the outer shell 1 and the end cover 2 are installed through a threaded connection. An extension sleeve 7 is provided on the surface of the end cover 2, and the extension sleeve 7 is an annular cylindrical structure, and the extension sleeve 7 is sleeved on the surface of the outer shell 1. End cover fixing screw holes 8 are provided at the corresponding positions of the extension sleeve 7 and the outer shell 1, and end cover fixing bolts 9 are provided in the end cover fixing screw holes 8 through threaded connection, support rod mounting screw holes 5 are provided at both ends of the support rod 4 and at the corresponding positions of the two groups of end covers 2, and support rod mounting screws 6 are provided in the support rod mounting screw holes 5 through threaded connection, and a caliper opening 3 begins to be provided on the surface of the end cover 2, and the caliper opening 3 is a circular groove body. There are two groups of caliper openings 3, and the two groups of caliper openings 3 are symmetrically distributed about the axis of the end cover 2.

[0028] When disassembling the outer shell 1 and the end cover 2, first remove the support rod mounting screw 6 in the support rod mounting screw hole 5, and then screw the end cover fixing bolt 9 out of the end cover fixing screw hole 8, and finally, insert the caliper into the caliper mouth 3, fix the outer shell 1 and screw the end cover 2, and then the end cover 2 can be removed.

[0029] Embodiment 4

[0030] On the basis of Example 3, in order to prevent the heat exchange fluid from leaking from the support rod mounting screw hole 5, a second gasket groove 12 is opened at both ends of the support rod 4. The second gasket groove 12 is an annular groove structure. A second gasket 13 is arranged in the second gasket groove 12. One end of the second gasket 13 extends out of the second gasket groove 12 and rests on the inner wall of the end cover 2.

[0031] Second gasket grooves 12 are provided at both ends of the support rod 4, and second gaskets 13 are arranged in the second gasket grooves 12. The second gasket 13 blocks the gap between the support rod 4 and the inner wall of the end cover 2, thereby separating the support rod mounting screw hole 5 from the heat exchange liquid and preventing the heat exchange liquid from leaking from the support rod mounting screw hole 5.

[0032] Embodiment 5

[0033] On the basis of the fourth embodiment, in order to limit the outer shell 1 when the outer shell 1 and the end cover 2 are disassembled and assembled, a plurality of groups of limit rods 16 are arranged on the surface of the outer shell 1, and the limit rods 16 are movably inserted in the limit grooves 15. The limit grooves 15 are provided on the surface of the limit seat 14. The limit seat 14 is composed of two parts. The two parts of the limit seat 14 are symmetrically distributed about the outer shell 1, and screw holes 17 are provided on the surface of the limit seat 14.

[0034] When the shell 1 and the end cover 2 are disassembled and assembled, the two groups of limit seats 14 are first spliced ​​and sleeved on the surface of the shell 1, and at the same time, each group of limit rods 16 is inserted into each group of limit grooves 15, and then the two groups of limit seats 14 are fixed on the table with screw holes by passing screws through the screw holes 17. In this way, when the shell 1 and the end cover 2 are disassembled and assembled, the shell 1 can be limited to prevent the shell 1 from rotating.

[0035] In actual use, the heat exchange device for a hemodialysis machine proposed by the utility model is threadedly connected between the end cover 2 and the shell 1, and a step is provided on the inner wall of the end cover 2, the shell 1 extends into the step of the end cover 2, and a first gasket groove 10 is also provided on the step of the end cover 2, and a first gasket 11 is provided in the first gasket groove 10. The gap between the shell 1 and the end cover 2 is blocked by the step and the first gasket groove 10, thereby achieving the purpose of preventing the permeate from leaking from the connection between the shell 1 and the end cover 2 and making the shell 1 and the end cover 2 detachable, thereby making it convenient to The outer shell 1 and the end cover 2 are convenient to disassemble. After disassembly, the capillary installed on the support rod 4 can be inspected and repaired to prevent the capillary from leaking, avoid harm to the patient's health and extend the service life of the heat exchange device for the hemodialysis machine; an extension sleeve 7 is provided on the surface of the end cover 2. When the threaded connection between the end cover 2 and the outer shell 1 is tightened, the end cover fixing screw hole 8 opened on the surface of the extension sleeve 7 is aligned with the end cover fixing screw hole 8 opened on the surface of the outer shell 1, and then the end cover fixing bolt 9 is screwed in the end cover fixing screw hole 8 through a threaded connection, and the end cover is fixed. The fixing bolts 9 prevent the shell 1 and the end cover 2 from rotating relative to each other, and thus prevent the threaded connection between the shell 1 and the end cover 2 from loosening. When disassembling the shell 1 and the end cover 2, first remove the support rod mounting screws 6 in the support rod mounting screw holes 5, and then screw the end cover fixing bolts 9 out of the end cover fixing screw holes 8. Finally, insert the caliper into the caliper mouth 3, fix the shell 1 and screw the end cover 2, and then the end cover 2 can be removed. The support rod 4 has second gasket grooves 12 at both ends, and the second gasket grooves 12 are provided with second gaskets 13. The second gaskets 1 3. The gap between the support rod 4 and the inner wall of the end cover 2 is blocked, so as to separate the support rod mounting screw hole 5 from the heat exchange liquid, and prevent the heat exchange liquid from leaking from the support rod mounting screw hole 5; when disassembling the shell 1 and the end cover 2, firstly, two groups of limit seats 14 are spliced ​​and sleeved on the surface of the shell 1, and at the same time, each group of limit rods 16 is inserted into each group of limit grooves 15, and then the two groups of limit seats 14 are fixed on the table with screw holes by passing screws through the screw holes 17, so that when the shell 1 and the end cover 2 are disassembled, the shell 1 can be limited to prevent the shell 1 from rotating.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchange device for a hemodialysis machine, comprising: A shell (1), an end cover (2) and a support rod (4), wherein two groups of end covers (2) are provided, the two groups of end covers (2) are installed at the two ends of the shell (1), a support rod (4) is provided between the two groups of end covers (2), and the support rod (4) is arranged in the shell (1), characterized in that: a step is provided on the inner wall of the open end of the end cover (2), the two ends of the shell (1) respectively extend into the steps of the two groups of end covers (2), the shell (1) and the end cover (2) are installed by threaded connection, a first gasket groove (10) is provided on the step of the end cover (2), the first gasket groove (10) is in an annular groove structure, a first gasket (11) is provided in the first gasket groove (10), and one end of the first gasket (11) extending out of the first gasket groove (10) abuts against the port of the shell (1).

2. A heat exchange device for a hemodialysis machine according to claim 1, characterized in that: An extension sleeve (7) is arranged on the surface of the end cover (2), the extension sleeve (7) is in an annular cylindrical structure, and the extension sleeve (7) is sleeved on the surface of the outer shell (1). End cover fixing screw holes (8) are provided at positions corresponding to the extension sleeve (7) and the outer shell (1), and end cover fixing screw holes (8) are arranged in the end cover fixing screw holes (8) through threaded connection.

3. A heat exchange device for a hemodialysis machine according to claim 1, characterized in that: A caliper opening (3) begins to be formed on the surface of the end cover (2). The caliper opening (3) is in the form of a circular groove. Two groups of caliper openings (3) are provided. The two groups of caliper openings (3) are symmetrically distributed about the axis of the end cover (2).

4. A heat exchange device for a hemodialysis machine according to claim 1, characterized in that: Support rod mounting screw holes (5) are provided at both ends of the support rod (4) and at positions corresponding to the two sets of end covers (2), and support rod mounting screws (6) are provided in the support rod mounting screw holes (5) through threaded connection.

5. The heat exchange device for a hemodialysis machine according to claim 1, characterized in that: Both ends of the support rod (4) are provided with a second gasket groove (12), the second gasket groove (12) is in an annular groove structure, a second gasket (13) is arranged in the second gasket groove (12), and one end of the second gasket (13) protruding from the second gasket groove (12) abuts against the inner wall of the end cover (2).

6. A heat exchange device for a hemodialysis machine according to claim 1, characterized in that: A plurality of groups of limiting rods (16) are arranged on the surface of the shell (1), and the limiting rods (16) are movably inserted in the limiting grooves (15). The limiting grooves (15) are arranged on the surface of the limiting seat (14). The limiting seat (14) is composed of two parts spliced ​​together. The two parts of the limiting seat (14) are symmetrically distributed with respect to the shell (1), and screw holes (17) are arranged on the surface of the limiting seat (14).

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