CN220025218U - Pressure control device for medical device and pressure pump system - Google Patents

Abstract

The present utility model relates to a pressure control device and a pressure pump system for a medical device. The pressure control device comprises a shell, wherein the shell is provided with a liquid inlet channel, an accommodating space and a liquid outlet channel, the liquid inlet channel, the accommodating space and the liquid outlet channel are sequentially communicated along a first direction, and the first direction is the direction of liquid flow; the opening and closing piece is arranged in the accommodating space and can move along a first direction under the action of liquid pressure, so that the liquid inlet channel and the liquid outlet channel are communicated; and the elastic piece is propped between the opening and closing piece and the shell, the elastic piece can generate preset thrust acting on the opening and closing piece, and the preset thrust can enable the opening and closing piece to move along a second direction, so that the liquid inlet channel and the liquid outlet channel are blocked, and the second direction is opposite to the first direction. By setting the pressure control equipment, the liquid stops outputting along with the stopping of the pressure pump system, the output quantity of the liquid is accurately controlled, and the success rate of the operation is improved.

Description

Pressure control device for medical device and pressure pump system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to pressure control equipment and a pressure pump system for medical equipment.

Background

Pressure pumps have been used for medical endoscopes because they can output high-pressure, small-flow fluids, and for performing operations such as submucosal doming in conjunction with medical instruments including injection needles or electric lancets. In the clinical use process, a doctor can start and stop the pressure pump system at any time according to the needs so as to control the mucosa swelling operation.

In the related art, when a pressure pump is used for delivering a liquid for an operation, the output quantity of the liquid is difficult to control accurately, and the success rate of the operation is affected.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a pressure control device and a pressure pump system that can accurately control the output of liquid and improve the success rate of surgery.

In one aspect, the present utility model provides a pressure control device for a medical device, the pressure control device comprising: the shell is provided with a liquid inlet channel, a containing space and a liquid outlet channel, wherein the liquid inlet channel, the containing space and the liquid outlet channel are sequentially communicated along a first direction, and the first direction is the direction of liquid flow; the opening and closing piece is arranged in the accommodating space and can move along a first direction under the action of liquid pressure, so that the liquid inlet channel and the liquid outlet channel are communicated; and the elastic piece is propped between the opening and closing piece and the shell, the elastic piece can generate preset thrust acting on the opening and closing piece, and the preset thrust can enable the opening and closing piece to move along a second direction, so that the liquid inlet channel and the liquid outlet channel are blocked, and the second direction is opposite to the first direction.

Through the setting of pressure control equipment, the elastic component produces the thrust of predetermineeing that acts on the piece that opens and shuts, and this thrust of predetermineeing can control the removal of piece that opens and shuts for feed liquor passageway and play liquid passageway switch on or close. With the stopping of the pressure pump system, under the action of the elastic piece and the opening and closing piece, the liquid stops to be output from the pressure control equipment, so that the accurate control of the liquid output is realized, and the success rate of the operation is improved.

In one embodiment, the housing includes a first housing and a second housing, the liquid inlet channel is disposed in the first housing, the liquid outlet channel is disposed in the second housing, the first housing includes a first contact surface, the second housing includes a second contact surface, the opening and closing member includes a third contact surface, the accommodating space is located between the first contact surface and the second contact surface, the elastic member is abutted between the second contact surface and the third contact surface, the elastic member can enable the opening and closing member to be abutted to the first contact surface, and the interval between the first contact surface and the second contact surface can be adjusted.

In one embodiment, the first housing is connected to the second housing, and the relative positions of the first housing and the second housing can be adjusted to adjust the distance between the first abutment surface and the second abutment surface.

In one embodiment, the opening and closing member has a closed position, in the closed position, the opening and closing member is abutted against the first abutting surface, a distance between the first abutting surface and the third abutting surface is fixed, and when the distance between the first abutting surface and the second abutting surface is adjusted, the distance between the second abutting surface and the third abutting surface is changed, so that the preset thrust force is changed.

In one embodiment, the liquid inlet channel comprises a liquid inlet communicated with the accommodating space, the opening and closing member comprises a mounting part and a flange part, the mounting part is configured to extend from the flange part along a first direction, the cross-sectional area of the mounting part is smaller than that of the flange part, the cross-sectional area of the flange part is larger than or equal to that of the liquid inlet, and the elastic member is sleeved on the periphery of the mounting part and is abutted between the shell and the flange part.

In one embodiment, the pressure control device further comprises a seal, the flange portion comprising a mounting surface facing the inlet channel, the seal being connected to the mounting surface, the seal having a cross-sectional area greater than the cross-sectional area of the inlet.

In one embodiment, the seal is integrally provided with the shutter.

In one embodiment, the seal is provided in the form of a sheet.

In one embodiment, the opening and closing member further includes a coupling portion extending from the flange portion in the second direction, and a cross-sectional area of the coupling portion is smaller than a cross-sectional area of the flange portion; the pressure control device further comprises a sealing element, the sealing element is arranged on the periphery of the combining part in a surrounding mode, the sealing element is provided with a mounting groove matched with the combining part, the sealing element and the combining part jointly define a sealing surface, and the cross section area of the sealing surface is larger than that of the liquid inlet.

In one embodiment, the opening and closing member further includes a guide portion connected to the flange portion, the guide portion being configured to extend in the second direction and be located in the liquid inlet channel.

In one embodiment, the accommodating space comprises an accommodating cavity arranged on the first shell, the accommodating cavity is communicated with the liquid outlet channel, the liquid outlet channel comprises a liquid outlet, the liquid outlet is arranged on the end face, facing the first shell, of the second shell, the end face, facing the first shell, of the second shell is configured to be a second abutting surface, and the cross section area of the elastic piece is larger than that of the liquid outlet.

In one embodiment, the accommodating space includes an accommodating cavity disposed in the first housing and an accommodating channel disposed in the second housing, the accommodating cavity is communicated with the accommodating channel, the liquid outlet channel includes a liquid outlet communicated with the accommodating channel, and a cross-sectional area of the accommodating channel is larger than that of the liquid outlet channel, so that the second housing forms a step portion, the step portion includes a step surface, the step surface is configured as a second abutting surface, and at least part of the elastic member is accommodated in the accommodating channel.

In another aspect, the present utility model provides a pressure pump system comprising: a pressure pump; a pressure control device as described above; and one end of the first connecting pipe is connected with the pressure pump, and the other end of the first connecting pipe is connected with the liquid inlet channel.

In one embodiment, the shutter has an open position and a closed position; when the liquid pressure in the first connecting pipe is larger than the preset thrust, the opening and closing piece can move from the closing position to the opening position along the first direction, so that the liquid inlet channel and the liquid outlet channel are communicated; when the liquid pressure in the first connecting pipe is smaller than the preset thrust, the opening and closing piece can move to the closing position along the second direction, so that the liquid inlet channel and the liquid outlet channel are blocked.

In one embodiment, the pressure pump system further comprises an output member connected to the liquid outlet channel; or the pressure pump system further comprises an output piece and a second connecting pipe, one end of the second connecting pipe is connected with the output piece, and the other end of the second connecting pipe is connected with the liquid outlet channel.

Drawings

FIG. 1 is a schematic diagram of a pressure pump system in an embodiment of the utility model.

Fig. 2 is a schematic view of a pressure control device according to an embodiment of the present utility model, in which the shutter is in a closed position and the seal is provided in a sheet form.

Fig. 3 is a schematic view of a pressure control apparatus according to an embodiment of the present utility model, in which the shutter is in the closed position and the seal is provided in a hollow structure.

Fig. 4 is a schematic view of a pressure control apparatus according to an embodiment of the present utility model, in which the opening and closing member is located at the closed position, and an end surface of the second housing facing the first housing is configured as a second abutment surface.

Fig. 5 is a schematic view of the pressure control apparatus according to an embodiment of the present utility model, in which the shutter is located at the open position and the step surface is configured as the second abutment surface.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1, fig. 1 shows a schematic diagram of a pressure pump system in some embodiments of the utility model. The pressure pump system 100 includes a pressure control apparatus 10, a pressure pump 20, and a connection pipe 30. The connection pipe 30 includes a first connection pipe 31, one end of the first connection pipe 31 is connected to the pressure pump 20, the other end is connected to the pressure control device 10, and high-pressure liquid output from the pressure pump 20 is delivered to the pressure control device 10 through the first connection pipe 31 and then output through the pressure control device 10.

In some embodiments, pressure pump system 100 further includes an output member 40, output member 40 being connected to pressure control device 10, outputting high pressure fluid from pressure control device 10 for performing a procedure. In a possible embodiment, the connection pipe 30 further comprises a second connection pipe 32, one end of the second connection pipe 32 being connected to the pressure control device 10 and the other end being connected to the output member 40. The high pressure fluid of the pressure control apparatus 10 is outputted to the output member 40 through the second connection pipe 32 to perform the operation. Typically, output member 40 may be a medical device such as an electric knife, an injection needle, or the like.

The conventional pressure pump system includes a pressure pump 20, a connection pipe 30, and an output member 40, and the connection pipe 30 has one end connected to the pressure pump 20 and the other end connected to the output member 40. Since the connection pipe 30 has elasticity, when the high pressure liquid is outputted, the connection pipe 30 is radially expanded, the radial expansion of the connection pipe 30 may cause the connection pipe 30 to generate residual pressure to the liquid, and a process is required for pressure release of the connection pipe 30, so that after the pressure pump 20 is stopped, the liquid in the connection pipe 30 may flow out from the output member 40 under the residual pressure of the connection pipe 30, so that the output amount of the liquid is difficult to be precisely controlled, thereby affecting the success rate of the operation, or causing medical accidents.

By providing the pressure control device 10 in the pressure pump system 100, the liquid output from the pressure pump 20 needs to pass through the pressure control device 10 before flowing to the output member 40. Under the action of the pressure control device 10, the liquid output from the pressure pump 20 needs to be output to the output member 40 under a certain pressure to perform the operation, and when the pressure pump 20 is stopped, the liquid pressure is reduced, and the liquid in the first connecting tube 31 is insufficient to open the pressure control device 10 under the residual pressure of the first connecting tube 31, so that the liquid in the first connecting tube 31 is prevented from flowing out of the pressure control device 10 under the residual pressure. Therefore, the liquid stops flowing out of the second connecting pipe 32 along with the stop of the pressure pump 20, the output quantity of the liquid can be precisely controlled, the success rate of the operation is improved, the user experience is improved, and the occurrence of medical accidents is avoided. Wherein the liquid pressure is the liquid pressure in the first connecting tube 31.

The pressure control device 10 of the present utility model in some embodiments is described in detail below.

Fig. 2 to 5, in combination with fig. 2 to 5, show schematic diagrams of the pressure control apparatus of the present utility model in some embodiments. In some embodiments, the pressure control apparatus 10 includes a housing 11, an opening and closing member 12, and an elastic member 13. The housing 11 serves on the one hand to protect and support the shutter 12 and the elastic element 13 and on the other hand to form a conduit for the passage of liquid. The housing 11 is provided with a liquid inlet passage 1111, an accommodating space, and a liquid outlet passage 1121, the liquid inlet passage 1111, the accommodating space, and the liquid outlet passage 1121 being sequentially communicated in a first direction S1, the first direction S1 being a direction in which liquid flows.

The opening and closing member 12 is disposed in the accommodating space, and the opening and closing member 12 can move along the first direction S1 under the action of the liquid pressure, so that a gap exists between the opening and closing member 12 and the liquid inlet channel 1111 in the first direction S1, and the liquid inlet channel 1111 and the liquid outlet channel 1121 are communicated, so that the liquid can flow from the liquid inlet channel 1111 to the accommodating space and then flow out from the liquid outlet channel 1121.

The elastic member 13 is pressed between the opening and closing member 12 and the housing 11, and the elastic member 13 can generate a preset pushing force acting on the opening and closing member 12, and the preset pushing force can enable the opening and closing member 12 to move along the second direction S2 to close the liquid inlet channel 1111, so that the connection between the liquid inlet channel 1111 and the liquid outlet channel 1121 is blocked, and the second direction S2 is opposite to the first direction S1. The elastic member 13 is provided to enable the opening and closing member 12 to close the liquid inlet passage 1111 so that liquid cannot flow from the liquid inlet passage 1111 into the accommodation space and further cannot flow out from the liquid outlet passage 1121.

When the pressure pump 20 is turned off, when the pressure of the liquid in the first connecting pipe 31 is reduced to be smaller than the preset pushing force, the opening and closing member 12 moves to close the liquid inlet channel 1111 under the action of the preset pushing force, so that the liquid cannot flow in from the liquid inlet channel 1111, the output of the liquid from the pressure control device 10 is prevented, the residual pressure applied to the liquid by the first connecting pipe 31 is avoided, the liquid can flow out from the pressure control device 10, the output of the liquid is controlled accurately, the waste of the liquid is avoided, the success rate of the operation is improved, and the user experience is optimized.

In some embodiments, referring to fig. 1 and 2, the housing 11 includes a first housing 111 and a second housing 112, the liquid inlet channel 1111 is configured in the first housing 111, the liquid outlet channel 1121 is configured in the second housing 112, and the liquid in the first connecting pipe 31 can flow in through the liquid inlet channel 1111 of the first housing 111 and flow out to the second connecting pipe 32 through the liquid outlet channel 1121 of the second housing 112.

Referring to fig. 3 and 4, the first housing 111 includes a first abutment surface 1112, the second housing 112 includes a second abutment surface 1122, the first housing 111 is connected to the second housing 112, the accommodating space is located between the first abutment surface 1112 and the second abutment surface 1122, and when the first housing 111 and the second housing 112 are connected, the positions of the first abutment surface 1112 and the second abutment surface 1122 are relatively fixed when the pressure control apparatus 10 is in use.

Further, the opening and closing member 12 includes a third contact surface 1221, the elastic member 13 is sleeved on the periphery of the opening and closing member 12, one end of the elastic member 13 contacts the third contact surface 1221 of the opening and closing member 12, and the other end contacts the second contact surface 1122.

Referring to fig. 3 and 5, the shutter 12 has an open position and a closed position. When the shutter 12 is in the closed position, the shutter 12 is in contact with the first contact surface 1112 by the elastic member 13, and when the shutter 12 is in the open position, a gap exists between the shutter 12 and the first contact surface 1112 in the first direction S1.

The second contact surface 1122 and the third contact surface 1221 co-press the elastic member 13, and elastically deform the elastic member 13 to have a corresponding elastic force. When the shutter 12 is in the closed position, the shutter 12 is abutted against the first abutment surface 1112, and the positions of the first abutment surface 1112 and the second abutment surface 1122 are relatively fixed, so that the distance between the second abutment surface 1122 and the third abutment surface 1221 is fixed, that is, the deformation amount of the elastic member 13 is determined, and the determined deformation amount corresponds to a determined elastic force, that is, a preset pushing force, and the elastic member 13 is deformed to restore the preset pushing force, and the movable shutter 12 is acted on by the preset pushing force.

When the pressure pump 20 is turned on, the liquid pressure in the first connecting pipe 31 increases to be greater than the preset pushing force, and the opening and closing member 12 moves from the closed position to the open position along the first direction S1 under the action of the liquid pressure, that is, the opening and closing member 12 is pushed by the liquid pressure to move along the first direction S1 and away from the first abutment surface 1112, so that the liquid inlet channel 1111 and the liquid outlet channel 1121 are conducted, and then the liquid can flow in from the liquid inlet channel 1111 and flow out from the liquid outlet channel 1121; when the pressure pump 20 is stopped, the pressure of the liquid in the first connecting pipe 31 is reduced to be smaller than the preset pushing force, the opening and closing member 12 is pushed by the preset pushing force to move to the closed position along the second direction S2, and the opening and closing member 12 abuts against the first abutting surface 1112 to close the liquid inlet channel 1111 in the closed position, so that the liquid inlet channel 1111 and the liquid outlet channel 1121 are blocked, and the liquid cannot flow in from the liquid inlet channel 1111.

In some embodiments, different relative fixed positions are configured between the first housing 111 and the second housing 112, that is, the relative positions of the first housing 111 and the second housing 112 can be adjusted to adjust the distance between the first abutment surface 1112 and the second abutment surface 1122, so as to adjust the magnitude of the preset thrust force, so that the pressure control apparatus 10 can adapt to different application scenarios.

In some embodiments, the first housing 111 and the second housing 112 are threadably coupled to each other, such that the first housing 111 and the second housing 112 can be in different relative fixed positions by controlling the length of the threaded coupling of the first housing 111 and the second housing 112. Specifically, as the relative positions of the first housing 111 and the second housing 112 are adjusted, the spacing between the first abutment surface 1112 and the second abutment surface 1122 is adaptively changed. When the shutter 12 is in the closed position, the shutter 12 abuts against the first abutment surface 1112 under the preset pushing force of the elastic member 13, which can be understood as that the distance between the third abutment surface 1221 and the first abutment surface 1112 is fixed. The distance between the first abutting surface 1112 and the second abutting surface 1122, that is, the distance between the second abutting surface 1112 and the third abutting surface 1122 is adjusted, the distance between the second abutting surface 1112 and the third abutting surface 1122 determines the deformation amount of the elastic member, and the elastic force of the elastic member 13, which is the preset thrust force, is determined by the deformation amount of the elastic member 13, so that the purpose of adjusting the preset thrust force is achieved by adjusting the distance between the second abutting surface 1122 and the third abutting surface 1122.

Different preset thrusts can correspond to different use conditions, such as when the pressure pump 20 inputs liquid with different pressures or when the pressure pump 20 is replaced, the pressure control device 10 can accurately control the output of the liquid under different use conditions, and the universality of the pressure control device 10 is improved.

In an embodiment of the present utility model, by adjusting the interval between the second abutting surface 1122 and the third abutting surface 1122 in the initial state, the extrusion amount of the second abutting surface 1122 and the opening and closing member 12 to the elastic member 13 is changed, so as to change the deformation amount of the elastic member 13 and further change the preset thrust of the elastic member 13 to the opening and closing member 12. In other possible embodiments, the elastic members 13 with different elastic coefficients may be replaced to obtain different preset thrusts.

In some embodiments, the fluid intake channel 1111 includes a fluid intake 1111a, and fluid in the fluid intake channel 1111 is able to enter the receiving space through the fluid intake 1111a, and the shutter 12 includes a mounting portion 121 and a flange portion 122 connected to the mounting portion 121. The mounting portion 121 is configured to be extended from the flange portion 122 in the first direction S1 so that the elastic member 13 can abut against the second housing 112. The cross-sectional area of the mounting portion 121 is smaller than the cross-sectional area of the flange portion 122. The mounting portion 121 facilitates mounting of the elastic member 13, so that the elastic member 13 can be pressed to generate a preset pushing force by the second housing 112 and the flange portion 122.

The flange 122 of the opening and closing member 12 abuts against the first abutting surface 1112 when in the closed position, and the cross-sectional area of the flange 122 is equal to or larger than the cross-sectional area of the liquid inlet 1111a, so that the flange 122 can close the liquid inlet 1111a, and thus the liquid cannot flow from the liquid inlet channel 1111 to the liquid outlet channel 1121.

In this embodiment, the third contact surface 1221 is an end surface of the flange 122 facing away from the liquid inlet channel 1111, the elastic member 13 is sleeved on the outer periphery of the mounting portion 121, and the elastic member 13 is in contact between the third contact surface 1221 of the flange 122 and the second contact surface 1122 of the second housing 112.

In some embodiments, referring to fig. 2 and 3, pressure control device 10 further includes a seal 14, flange portion 122 including a mounting surface 1222 facing fluid intake channel 1111, seal 14 being coupled to mounting surface 1222. The provision of the seal member 14 further improves the closing effect of the shutter 12 to the liquid inlet 1111a, avoiding liquid from entering the liquid outlet passage 1121 from the liquid inlet passage 1111 due to incomplete fitting of the mounting surface 1222 to the liquid inlet 1111a. On the other hand, when the opening and closing member 12 is made of metal, the sealing performance of the opening and closing member 12 made of metal is limited, and the arrangement of the sealing member 14 compensates for the defect of the opening and closing member 12, so that the normal use of the pressure control device 10 is ensured.

Further, the sealing member 14 and the opening and closing member 12 are integrally provided. By the integrated arrangement, the opening and closing member 12 and the sealing member 14 are allowed to move together under the action of the liquid pressure and the preset pushing force, so that the liquid is facilitated to flow from the liquid inlet channel 1111 to the liquid outlet channel 1121. The seal 14 and the shutter 12 are integrally provided, particularly but not limited to, the seal 14 being injection molded onto the shutter 12 or the seal 14 being bonded to the shutter 12.

In some embodiments, the sealing member 14 is in a sheet shape and is configured between the mounting surface 1222 and the liquid inlet 1111a, the cross-sectional area of the sealing member 14 is larger than the cross-sectional area of the liquid inlet 1111a, and under the preset pushing force of the elastic member 13, the sealing member 14 abuts against the liquid inlet 1111a to seal the liquid inlet 1111a, so that the liquid cannot flow from the liquid inlet 1111 to the liquid outlet 1121.

In some embodiments, referring to fig. 3, the opening and closing member 12 further includes a coupling portion 124, where the coupling portion 124 extends from the flange portion 122 along the second direction S2, and a cross-sectional area of the coupling portion 124 is smaller than a cross-sectional area of the flange portion 122. Accordingly, the seal 14 is hollow and surrounds the outer periphery of the joint portion 124, and the seal 14 is disposed between the first abutment surface 1112 and the mounting surface 1222 along the first direction S1.

In this embodiment, the seal 14 is provided with a mounting groove that mates with the bond 124. Optionally, the bonding portion 124 is in an interference fit with the mounting groove, so that the liquid does not flow into the accommodating space through the gap between the bonding portion 124 and the mounting groove, and the sealing effect of the sealing member 14 is ensured.

The seal 14 and the junction 124 together define a sealing surface 141, the sealing surface 141 having a cross-sectional area greater than the cross-sectional area of the fluid inlet 1111a. Seal 14 may alternatively be a sealing element such as an O-ring. The sealing member 14 is capable of being deformed circumferentially by a preset pushing force so that sealing is achieved between the liquid inlet 1111a and the shutter 12 such that liquid cannot flow from the liquid inlet passage 1111 to the liquid outlet passage 1121.

In some embodiments, the shutter 12 further includes a guide portion 123 connected to the flange portion 122, the guide portion 123 being configured to extend into the liquid inlet channel 1111 in the second direction S2, the guide portion 123 having a cross-sectional area smaller than or equal to the cross-sectional area of the liquid inlet 1111a, such that the guide portion 123 can be accommodated in the first housing 111 and can move under the action of the liquid pressure and the preset pushing force. The guiding part 123 is arranged, so that the opening and closing piece 12 can be installed in the first shell 111, the opening and closing piece 12 is convenient to stabilize in the first shell 111, normal use of the pressure control device 10 is guaranteed, and the situation that the opening and closing piece 12 cannot close the liquid inlet 1111a due to dislocation of the opening and closing piece 12 is avoided.

In some embodiments, the liquid outlet channel 1121 includes a liquid outlet 1121a communicating with the accommodating space, and the cross-sectional area of the elastic member 13 is between the cross-sectional area of the liquid outlet 1121a and the cross-sectional area of the flange portion 122, so that the elastic member 13 can be stably pressed by the second housing 112 and the opening and closing member 12, realizing elastic deformation, and ensuring that the elastic member 13 can be normally applied to the pressure control apparatus 10.

In some embodiments, referring to fig. 4, the first housing 111 is provided with a receiving cavity 1113, where the receiving cavity 1113 is in communication with the liquid outlet channel 1121a, and the receiving cavity 1113 may be used as a receiving space of the pressure control apparatus 10 alone. The opening and closing member 12 and the elastic member 13 are accommodated only in the first housing 111, the end surface of the second housing 112 facing the first housing 111 is configured as the second abutment surface 1122, and the liquid outlet 1121a is provided on the end surface of the second housing 112 facing the first housing 111.

In other embodiments, referring to fig. 5, the first housing 111 is provided with a receiving cavity 1113, and the second housing 112 is further provided with a receiving passage 1123, and the receiving passage 1123 communicates with the receiving cavity 1113 to jointly form a receiving space of the pressure control apparatus 10. The liquid of the accommodation channel 1123 can enter the liquid outlet channel 1121 through the liquid outlet port 1121a, the cross-sectional area of the accommodation channel 1123 is larger than the cross-sectional area of the liquid outlet channel 1121, so that the second housing 112 forms a stepped portion including a stepped surface configured as the second abutment surface 1122, at least part of the elastic member 13 is accommodated in the accommodation channel 1123 and abuts against the stepped surface, and the cross-sectional area of the elastic member 13 is interposed between the cross-sectional area of the accommodation channel 1123 and the cross-sectional area of the liquid outlet channel 1121.

The setting of holding passageway 1123 for elastic component 13 can stably install in accommodation space, makes the both ends of opening and shutting piece 12 all obtain housing 11's accommodation simultaneously, makes opening and shutting piece 12 can stably install in accommodation space, and then guarantees that opening and shutting piece 12 can be in open position and closed position accurately, and pressure control equipment 10 can control the output of liquid to the output of accurate control liquid.

Further, the central axis of the opening and closing member 12, the central axis of the liquid inlet channel 1111 and the central axis of the liquid outlet channel 1121 are coincident, so that the opening and closing member 12 is uniformly stressed under the pressure of the liquid, the liquid can flow into the liquid outlet channel 1121 through the liquid inlet channel 1111 uniformly, and the operation efficiency and the operation precision are improved.

In some embodiments, referring to fig. 1, 3 and 5, the liquid inlet channel 1111 includes a connection channel 1111b and a guide channel 1111c, where the connection channel 1111b, the guide channel 1111c and the receiving chamber 1113 are sequentially connected along the first direction S1, the guide channel 1111c is configured to receive at least a part of the opening and closing member 12, and the guide channel 1111c is configured to enable the guide portion 123 of the opening and closing member 12 to be mounted on the first housing 111. The first connection pipe 31 is connected to the connection passage 1111b. The provision of the connection passage 1111b enables the pressure control apparatus 10 to be adapted to different first connection pipes 31, improving versatility of the pressure control apparatus 10.

Further, the cross-sectional area of the connection channel 1111b is larger than that of the guide channel 1111c, so that the liquid in the first connection pipe 31 can smoothly flow into the guide channel 1111c, and the normal use of the pressure pump system 100 is ensured.

The pressure control device 10 is installed at one end of the pressure pump system 100, the preset thrust of the elastic piece 13 to the opening and closing piece 12 is set by setting the initial compression amount of the elastic piece 13, the preset thrust is larger than the residual pressure applied to the liquid by the radial expansion of the first connecting pipe 31, when the pressure pump 20 stops, no liquid is output by the liquid outlet channel 1121, the output quantity of the liquid is accurately controlled, the success rate of the operation is improved, the user experience is optimized, and the occurrence of medical accidents is avoided.

In the embodiment disclosed in the present utility model, the pressure control apparatus 10 is cylindrical as a whole, and the opening and closing member 12, the elastic member 13, the sealing member 14, the liquid inlet channel 1111, the liquid outlet channel 1121, and the receiving channel 1123 are cylindrical, and the cross sections mentioned above are circular. In other embodiments, the pressure control apparatus 10 may also be prismatic, irregularly shaped, or the like, and accordingly, the shutter 12, the elastic member 13, the sealing member 14, the liquid inlet passage 1111, the liquid outlet passage 1121, and the receiving passage 1123 are provided in a quadrangular, triangular, or irregularly shaped, and the above-mentioned cross section is square, triangular, or irregularly shaped, respectively.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (15)

1. A pressure control device for a medical device, the pressure control device comprising:

the liquid inlet channel, the accommodating space and the liquid outlet channel are sequentially communicated along a first direction, and the first direction is the direction of liquid flow;

the opening and closing piece is arranged in the accommodating space and can move along the first direction under the pressure action of liquid, so that the liquid inlet channel and the liquid outlet channel are communicated; and

the elastic piece is propped between the opening and closing piece and the shell, the elastic piece can generate preset thrust acting on the opening and closing piece, the preset thrust can enable the opening and closing piece to move along a second direction, so that the liquid inlet channel and the liquid outlet channel are blocked, and the second direction is opposite to the first direction.

2. The pressure control apparatus according to claim 1, wherein the housing includes a first housing and a second housing, the liquid inlet passage is disposed in the first housing, the liquid outlet passage is disposed in the second housing, the first housing includes a first abutment surface, the second housing includes a second abutment surface, the opening and closing member includes a third abutment surface, the accommodation space is located between the first abutment surface and the second abutment surface, the elastic member is abutted between the second abutment surface and the third abutment surface, and the elastic member enables the opening and closing member to be abutted against the first abutment surface, and a distance between the first abutment surface and the second abutment surface is adjustable.

3. The pressure control device of claim 2, wherein the first housing is coupled to the second housing, and a relative position of the first housing and the second housing is adjustable to adjust a spacing between the first abutment surface and the second abutment surface.

4. The pressure control apparatus according to claim 2, wherein the shutter has a closed position in which the shutter abuts against the first abutment surface, a distance between the first abutment surface and the third abutment surface is fixed, and when a distance between the first abutment surface and the second abutment surface is adjusted, a distance between the second abutment surface and the third abutment surface is changed, so that the preset thrust force is changed.

5. The pressure control apparatus according to claim 1 or 2, wherein the liquid inlet passage includes a liquid inlet communicating with the accommodation space, the opening-closing member includes a mounting portion configured to be provided extending from the flange portion in the first direction, a cross-sectional area of the mounting portion is smaller than a cross-sectional area of the flange portion, a cross-sectional area of the flange portion is equal to or larger than a cross-sectional area of the liquid inlet, and the elastic member is fitted around an outer periphery of the mounting portion and abuts between the housing and the flange portion.

6. The pressure control device of claim 5, further comprising a seal, the flange portion including a mounting surface facing the fluid inlet channel, the seal being coupled to the mounting surface, the seal having a cross-sectional area greater than a cross-sectional area of the fluid inlet.

7. The pressure control device of claim 6, wherein the seal is integrally provided with the shutter.

8. The pressure control device of claim 6, wherein the seal is provided in a sheet form.

9. The pressure control apparatus according to claim 5, wherein the opening-closing member further includes a joint portion provided extending in the second direction from the flange portion, the joint portion having a smaller cross-sectional area than the flange portion; the pressure control device further comprises a sealing element, the sealing element is arranged on the periphery of the combining part in a surrounding mode, the sealing element is provided with a mounting groove matched with the combining part, the sealing element and the combining part jointly define a sealing surface, and the cross section area of the sealing surface is larger than that of the liquid inlet.

10. The pressure control device of claim 5, wherein the shutter further comprises a guide portion coupled to the flange portion, the guide portion configured to extend in the second direction and be positioned within the feed channel.

11. The pressure control device according to claim 2, wherein the accommodation space includes an accommodation chamber provided in the first housing, the accommodation chamber is communicated with the liquid outlet passage, the liquid outlet passage includes a liquid outlet provided on an end face of the second housing facing the first housing, the end face of the second housing facing the first housing is configured as the second abutment face, and a cross-sectional area of the elastic member is larger than a cross-sectional area of the liquid outlet.

12. The pressure control apparatus according to claim 2, wherein the accommodation space includes an accommodation chamber provided in the first housing and an accommodation passage provided in the second housing, the accommodation chamber is communicated with the accommodation passage, the liquid outlet passage includes a liquid outlet communicated with the accommodation passage, a cross-sectional area of the accommodation passage is larger than a cross-sectional area of the liquid outlet passage, so that a stepped portion is formed inside the second housing, the stepped portion includes a stepped surface configured as the second abutment surface, and at least part of the elastic member is accommodated in the accommodation passage.

13. A pressure pump system, the pressure pump system comprising:

a pressure pump;

a pressure control device as claimed in any one of claims 1 to 12; and

and one end of the first connecting pipe is connected with the pressure pump, and the other end of the first connecting pipe is connected with the liquid inlet channel.

14. The pressure pump system of claim 13, wherein the shutter has an open position and a closed position; when the liquid pressure in the first connecting pipe is larger than the preset thrust, the opening and closing piece can move from the closing position to the opening position along the first direction, so that the liquid inlet channel and the liquid outlet channel are communicated; when the liquid pressure in the first connecting pipe is smaller than the preset thrust, the opening and closing piece can move to a closing position along the second direction, so that the liquid inlet channel and the liquid outlet channel are blocked.

15. The pressure pump system of claim 13, further comprising an output member connected to the outlet channel; or (b)

The pressure pump system further comprises an output piece and a second connecting pipe, one end of the second connecting pipe is connected with the output piece, and the other end of the second connecting pipe is connected with the liquid outlet channel.