CN219167419U - Breathing machine valves - Google Patents

Abstract

The utility model discloses a breathing machine valve group, which comprises a valve seat and a control valve in butt joint communication with the valve seat, wherein the valve seat is provided with an air inlet, an air outlet, a purging port and a zero calibration port communicated with the atmosphere, and the air outlet is used for being connected with a pressure sensor; the valve seat is internally provided with a purging gas circuit, an air outlet gas circuit and a zero calibrating gas circuit, the purging gas circuit is communicated with the air inlet and the purging port, the air outlet gas circuit is communicated with the air inlet and the air outlet, the zero calibrating gas circuit is communicated with the air outlet and the zero calibrating port, and the control valve is used for controlling the on-off of the air outlet gas circuit and the zero calibrating gas circuit. The purging air passage and the zero calibration air passage are integrated in the valve seat of the valve group, and the connection and disconnection of the air passage in the valve seat are controlled by the control valve, so that the integrated design of the purging module and the zero calibration module is realized. The arrangement of the internal pipelines of the breathing machine is greatly simplified, a large number of air pipes are saved, and the air leakage risk is greatly reduced. The minimum integration of module volume is reached, and in breathing equipment, this valves can realize simple transplanting, uses.

Description

Breathing machine valves

Technical Field

The utility model belongs to the technical field of medical equipment, and particularly relates to a respirator valve group.

Background

With the development of technology and the progress of technology, people have higher and higher requirements on the use requirements and the use experience of the breathing machine, so that the structure and the functions of the breathing machine are also more and more abundant. For example, the inside of the existing breathing machine is provided with a purging module and a sensor zeroing module besides a normal breathing pipeline for a user to realize purging and sensor zeroing functions.

Wherein, the effect of blowing the module does: the proximal pressure line channel of the ventilator requires a fluid blockage of the patient, which may cause deviations in pressure readings of the proximal pressure line sensor, including water or mucus, etc., and which may be adverse to the machine by the machine and cause cross-contamination problems for the patient due to untimely cleaning of internal components. The purging module is used for purging the blocked fluid in a gas flow purging mode, and is the most commonly used method at present.

The zero calibration module has the functions of: when the machine pressure sensor and the proximal pressure sensor need to be detected and controlled, the two sensors need to be calibrated for ambient pressure, which is typically accomplished by solenoid valves. When the machine pressure sensor needs to zero the atmosphere, the control system gives a control signal to the electromagnetic valve, the machine pressure sensor is communicated with the atmosphere through the internal structure of the electromagnetic valve, and the air flow in the machine is cut off from being communicated with the machine pressure sensor, so that the zero-calibration action is realized; similarly, when the near-end pressure sensor needs to perform zero calibration on the atmosphere, the control system gives a control signal to the electromagnetic valve, cuts off the air flow inside the machine from being communicated to the near-end pressure sensor, and the near-end pressure sensor is communicated with the atmosphere through the internal structure of the electromagnetic valve, so that the zero calibration of the near-end pressure sensor is realized.

Therefore, as a plurality of modules are additionally arranged in the breathing machine, and the modules are connected through pipelines, the internal layout of the breathing machine is complicated and messy, and each interface has corresponding air leakage risk, so that the risk is extremely high in the oxygen mixing equipment. Moreover, various pipelines in the breathing machine are stacked in a crossed mode, the layout is very messy, connection relation of the pipelines cannot be visually seen during later maintenance and replacement, and a plurality of inconveniences exist during disassembly and reconnection.

Disclosure of Invention

The utility model provides a respirator valve group to solve at least one of the technical problems.

The technical scheme adopted by the utility model is as follows:

the valve group of the breathing machine comprises a valve seat and a control valve which is in butt joint communication with the valve seat, wherein the valve seat is provided with an air inlet, an air outlet, a purging port and a zero calibration port communicated with the atmosphere, and the air outlet is used for being connected with a pressure sensor; the valve seat is internally provided with a purging gas circuit, an air outlet gas circuit and a zero calibration gas circuit, the purging gas circuit is communicated with the air inlet and the purging port, the air outlet gas circuit is communicated with the air inlet and the air outlet, the zero calibration gas circuit is communicated with the air outlet and the zero calibration port, and the control valve is used for controlling the on-off of the air outlet gas circuit and the zero calibration gas circuit.

The air outlet comprises a first air outlet and a second air outlet, the first air outlet is connected with the machine pressure sensor, and the second air outlet is connected with the near-end pressure sensor; the zero calibration gas circuit comprises a first zero calibration gas circuit communicated with the machine pressure sensor and a second zero calibration gas circuit communicated with the near-end pressure sensor, the control valve comprises a first valve body and a second valve body, the first valve body is used for controlling the on-off of the first zero calibration gas circuit, and the second valve body is used for controlling the on-off of the second zero calibration gas circuit.

The valve seat is provided with a fixing protrusion which is arranged in a protruding mode, the fixing protrusion encloses a mounting position, and the control valve is fixed at the mounting position.

The ventilator valve group further comprises a cover plate, and the cover plate can be fixedly connected with the fixing protrusion so as to press the control valve.

The valve seat is provided with a plurality of seal grooves, at least one butt joint port used for being in butt joint communication with the control valve is arranged in the seal grooves, sealing rib positions are arranged between two adjacent butt joint ports, so that the seal grooves are divided into a plurality of seal cavities, and the butt joint ports are correspondingly arranged in the seal cavities.

And a sealing seat is further arranged between the valve seat and the control valve, the sealing seat is provided with a butt joint, and the butt joint part of the control valve stretches into the butt joint to be in butt joint communication with the butt joint.

The depth of each sealing cavity is different, and the heights of the butt joints are arranged in one-to-one correspondence with the sealing cavities.

The butt joint is further provided with an elastic sealing part extending into the sealing groove, and the outer wall of the elastic sealing part is provided with a sealing convex rib.

The sealing rib is bent and extends to encircle one of the butt joints.

The respirator valve group further comprises a throttle valve arranged in the purging gas path, the valve seat is provided with an adjusting groove, the throttle valve is arranged in the adjusting groove and provided with a plugging part extending into the purging gas path, and the throttle valve can move relative to the valve seat so as to change the plugging area of the plugging part to the purging gas path.

The throttle valve further comprises a limiting part, the limiting part can be stopped with the groove wall of the adjusting groove to limit the throttle valve to move, and a sealing piece is arranged between the limiting part and the groove wall of the adjusting groove.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. the purging air passage and the zero calibration air passage are integrated in the valve seat of the valve group, and the communication and disconnection of each air passage in the valve seat are controlled by the control valve, so that the integrated design of the purging module and the zero calibration module is realized. The arrangement of the internal pipelines of the breathing machine is greatly simplified, a large number of air pipes are saved, the internal layout of the breathing machine is simplified, and the air leakage risk is greatly reduced. The minimum integration of module volume is achieved, the stability and accuracy of collected data are met, and the problem of leakage inside the machine is solved to the greatest extent. In addition, in the breathing equipment, the valve group can be simply transplanted and applied.

In addition, the air path which is originally connected through the external pipeline is transferred to the inside of the valve seat, so that the pipeline connection structure and the arrangement of the pipelines are greatly optimized, the number of the external pipelines is as small as possible, the internal visual experience of the breathing machine is optimized, workers can intuitively see the connection relation between the pipelines, the assembly efficiency is improved, and the maintenance and replacement difficulty is reduced.

2. As a preferred embodiment of the present utility model, the ventilator valve block further includes a cover plate which can be fixedly connected with the fixing boss to press the control valve. The cover plate is fixedly connected with the fixed protrusion of the valve seat, and the cover plate and the fixed protrusion are matched together to form a mounting position for mounting the control valve, so that the connection strength of the control valve and the valve seat is improved, the sealing effect of the butt joint position of the control valve and the valve seat is guaranteed, and under the action of the pre-tightening force of the cover plate, the control valve is pressed towards the valve seat, so that a communication port on the control valve is tightly attached to a communication port on the valve seat, and the sealing of the butt joint position of the control valve and the valve seat is further enhanced.

3. As a preferred embodiment of the utility model, the valve seat is provided with a plurality of sealing grooves, at least one butt joint port for butt joint communication with the control valve is arranged in the sealing grooves, and sealing rib positions are arranged between two adjacent butt joint ports so as to divide the sealing grooves into a plurality of sealing cavities. The sealing ribs are positioned between two adjacent sealing cavities to form side sealing, each butt joint is sealed and isolated, the design improves the condition that the two paths of the control valve are not sealed independently under the condition that the distance between the two paths is relatively close, and provides effective isolation sealing measures for each butt joint.

4. As a preferred embodiment of the present utility model, the depth of each seal cavity is different, and the height of each abutment is arranged in one-to-one correspondence with the seal cavity. Each seal cavity is different in height, and the butt joint corresponds each seal cavity height design, realizes ladder seal, and each seal ladder dislocation overall arrangement can reduce the influence each other between two adjacent butt joints, reduces the risk that the sealing washer of two butt joints takes place extrusion interference, guarantees each independent seal to the interface.

5. As a preferred embodiment of the utility model, the respirator valve group further comprises a throttle valve arranged in the purging gas path, the valve seat is provided with an adjusting groove, the throttle valve is arranged in the adjusting groove and is provided with a plugging part extending into the purging gas path, and the throttle valve can move relative to the valve seat so as to change the plugging area of the plugging part to the purging gas path. The throttle valve can enable the blocking part to adjust the blocking area of the purging gas circuit through movement, so that the conduction area of the purging gas circuit is changed, different purging gas amounts are obtained, purging of different wind powers with multiple gears is achieved, purging wind power can be adjusted according to pollution conditions in a pipeline, and power consumption of a purging system is saved on the basis of ensuring purging effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic diagram of a valve block of a ventilator according to an embodiment of the present utility model;

FIG. 2 is a schematic view of another side of the valve block of the respirator of FIG. 1;

FIG. 3 is an exploded view of the structure of the valve block of the respirator of FIG. 1;

FIG. 4 is a cross-sectional view of the valve block of the ventilator of FIG. 1;

FIG. 5 is a cross-sectional view of the valve block of FIG. 1 from another perspective;

FIG. 6 is a cross-sectional view of a valve seat portion area in accordance with one embodiment of the present utility model;

FIG. 7 is a schematic view of a valve seat according to an embodiment of the present utility model;

FIG. 8 is a schematic structural view of a seal holder according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a valve seat according to another embodiment of the present utility model;

FIG. 10 is a schematic view of a seal holder according to another embodiment of the present utility model;

fig. 11 is a diagram of a pneumatic system of a ventilator according to an embodiment of the present utility model.

Wherein:

1, a valve seat; 11 air inlets; 12 a first air outlet; 13 a second air outlet; 14 a purge port; 15 fixing the bulge; a 16-blowing gas circuit; 161 an air outlet path; 162 zeroing air circuit; 163 zeroing port; 17 an adjusting groove; 18 pairs of interfaces; 19 sealing grooves; 191 sealing rib positions; 192 sealing the cavity;

2, controlling a valve; a first valve body 21; 22 a second valve body;

3, a cover plate;

a throttle valve; 41 blocking parts; 42 limit parts;

5 a sealing member;

6, sealing a seat; 61 butt joints; 62 sealing the ribs;

7, a gas inlet; 71 a blower; 72 flow sensor; 73 machine pressure sensor; 74 suction ports; a 75 proximal pressure sensor; 76 proximal connection tube; 77 patient interface; 78 a humidifier;

Detailed Description

In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

In addition, in the description of the present utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the descriptions of the terms "implementation," "embodiment," "one embodiment," "example," or "particular example" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 10, a valve group of a breathing machine comprises a valve seat 1 and a control valve 2 in butt joint communication with the valve seat 1, wherein the valve seat 1 is provided with an air inlet 11, an air outlet, a purging port 14 and a zero calibrating port 163 communicated with the atmosphere, and the air outlet is used for being connected with a pressure sensor; the valve seat 1 is internally provided with a purging gas circuit 16, an air outlet gas circuit 161 and a zero calibration gas circuit 162, the purging gas circuit 16 is communicated with the air inlet 11 and the purging port 14, the air outlet gas circuit 161 is communicated with the air inlet 11 and the air outlet, the zero calibration gas circuit 162 is communicated with the air outlet and the zero calibration port 163, and the control valve 2 is used for controlling the on-off of the air outlet gas circuit 161 and the zero calibration gas circuit 162.

As shown in fig. 2, the air outlet comprises a first air outlet 12 and a second air outlet 13, the first air outlet 12 is connected with a machine pressure sensor 73, and the second air outlet 13 is connected with a proximal pressure sensor 75; the zero calibration air path 162 comprises a first zero calibration air path communicated with the machine pressure sensor 73 and a second zero calibration air path communicated with the near-end pressure sensor 75, the control valve 2 comprises a first valve body 21 and a second valve body 22, the first valve body 21 is used for controlling the on-off of the first zero calibration air path, and the second valve body 22 is used for controlling the on-off of the second zero calibration air path.

As shown in fig. 11, the working principle of the whole breathing machine of the utility model is that the air entering from the air inlet 7 is pressurized by the blower 71, the air enters the flow sensor 72 to feed back and control the motor rotation speed, the pressure value is read in real time by the machine pressure sensor 73, and the air is sent out of the air suction port 74. The output gas is warmed and humidified via humidifier 78, the breathing circuit, and enters patient interface 77 for inhalation by the patient. At the same time, a proximal pressure sensor 75 is provided near the patient interface. For feedback of the value of the proximal pressure to the machine for control feedback, a proximal pressure sampling port is provided on the machine, and a proximal connection tube 76 is connected between the proximal patient interface 77 and the second air outlet 13 (proximal pressure port) for air-path communication. Inside the machine, the proximal pressure sampling interface communicates with a proximal pressure sensor 75, enabling real-time acquisition of proximal pressure.

Preferably, the purge port 14 is also in communication with a proximal pressure sensor 75 to form the proximal pressure sampling interface described above for real-time acquisition of proximal pressure.

During the purging function, since the proximal pressure interface is connected to the gas at the patient interface 77, sputum, condensation of water vapor, or other objects may occur, which may cause inaccurate monitoring of the proximal pressure sensor 75 and machine malfunction, a flow of gas is required to clean and feed back the proximal pressure sampling interface, i.e. after the flow sensor 72, a high pressure flow of gas is connected, and the flow of gas is regulated to a suitable output flow through the throttle valve 4, and the gas path is connected to the proximal pressure interface to purge the proximal connecting pipe 76.

The control valve 2 is used for controlling the on-off of the zero calibration air channel 162 and the air outlet air channel 161, when the breathing machine is used normally, the air outlet air channel 161 is conducted, and air flows to the patient end for the patient to use. When the pressure sensor needs to be calibrated, the air outlet channel 161 is disconnected through the control valve 2, the zero calibration channel 162 is connected, and the air flow inside the machine is disconnected from the pressure sensor, and the pressure sensor is communicated with the atmosphere.

The control valve 2 includes a first valve body 21 and a second valve body 22, the first valve body 21 being disposed on a connection passage of the machine pressure sensor 73, and the second valve body 22 being disposed on a connection passage of the proximal pressure sensor 75. When the machine pressure sensor 73 needs to zero the atmosphere, the control system gives a control signal to the first valve body 21, the machine pressure sensor 73 is communicated with the atmosphere through the internal structure of the first valve body 21, and the air flow in the machine is cut off from being communicated with the machine pressure sensor 73, so that the zero-calibration action is realized. Similarly, when the near-end pressure sensor 75 needs to perform zero calibration on the atmosphere, the control system controls the second valve body 22 to signal, so that the air flow in the machine is cut off from being communicated to the near-end pressure sensor 75, and the near-end pressure sensor 75 is communicated with the atmosphere through the internal structure of the second valve body 22, so that the zero calibration on the near-end pressure sensor 75 is realized.

It should be noted that the first zeroing air path and the second zeroing air path may share one zeroing port 163, or two zeroing ports 163 may be respectively opened corresponding to the first zeroing air path and the second zeroing air flow, which is not limited herein specifically.

Preferably, the first valve body 21 and the second valve body 22 are both solenoid valves.

The first air outlet 12 and the second air outlet 13 can be directly connected to the sensor, or the sensor can be fixed on the valve seat 1.

The utility model integrates the purging air passage 16 and the zero calibration air passage 162 in the valve seat 1 of the valve group, and controls the connection and disconnection of the air passage in the valve seat 1 through the control valve 2, thereby realizing the integrated design of the purging module and the zero calibration module. The arrangement of the internal pipelines of the breathing machine is greatly simplified, a large number of air pipes are saved, the internal layout of the breathing machine is simplified, and the air leakage risk is greatly reduced. The minimum integration of module volume is achieved, the stability and accuracy of collected data are met, and the problem of leakage inside the machine is solved to the greatest extent. In addition, in the breathing equipment, the valve group can be simply transplanted and applied.

In addition, the air path which is originally connected through the external pipeline is transferred to the inside of the valve seat 1, so that the pipeline connection structure and the arrangement of the pipelines are greatly optimized, the number of the external pipelines is as small as possible, the internal visual experience of the breathing machine is optimized, workers can intuitively see the connection relation between the pipelines, the assembly efficiency is improved, and the difficulty of maintenance and replacement is reduced. And moreover, the air circuit is internally arranged, so that the problem that the air flow efficiency is affected due to the fact that the pipeline is bent is also avoided.

As a preferred embodiment of the utility model, as shown in fig. 3, the valve seat 1 has a convexly arranged fixing projection 15, the fixing projection 15 enclosing a mounting location, to which the control valve 2 is fixed.

The control valve 2 is fixed in the region that fixed protruding 15 encloses, has improved the stability of being connected and the convenience of assembly of control valve 2 and disk seat 1 on the one hand, and on the other hand when the fixed back of accomplishing of control valve 2, fixed protruding 15 can form spacingly to control valve 2, restricts control valve 2 in the installation position, prevents that control valve 2 from taking place the skew for disk seat 1.

Further, as shown in fig. 1 and 3, the ventilator valve group further includes a cover plate 3, and the cover plate 3 can be fixedly connected with the fixing protrusion 15 to press the control valve 2.

The cover plate 3 is fixedly connected with the fixing protrusion 15 of the valve seat 1, and the cover plate 3 and the valve seat 1 are matched together to form an installation position for installing the control valve 2, so that the connection strength of the control valve 2 and the valve seat 1 is improved, the sealing effect of the butt joint of the control valve 2 and the valve seat 1 is ensured, and under the action of the pretightening force of the cover plate 3, the control valve 2 is pressed towards the valve seat 1, so that a communication port on the control valve 2 is tightly attached to a communication port on the valve seat 1, and the sealing of the butt joint of the control valve 2 and the valve seat 1 is further enhanced.

It should be noted that, in this embodiment, the connection manner of the cover plate 3 and the fixing protrusion 15 is not specifically limited, and in a preferred embodiment, as shown in fig. 1 and 3, the cover plate 3 and the fixing protrusion 15 are both provided with fixing holes, and the valve set further includes fasteners (such as screws, etc.) that pass through the fixing holes to fasten and connect the cover plate 3 and the fixing protrusion 15.

Of course, the cover plate 3 and the fixing protrusion 15 may be fixed by other manners, such as clamping, magnetic attraction, and the like, which are not limited herein.

It can be understood that, because the valve seat 1 integrates a plurality of air passage modules, the valve seat 1 is provided with a plurality of opposite interfaces 18, and the control valve 2 is correspondingly provided with valve ports, which are in butt joint communication, so that the control valve 2 is communicated with the air passage inside the valve seat 1, and the on-off of the air passage is controlled. And a sealing element is arranged between the valve seat and the control valve, however, because some valve ports of the control valve are relatively close and are positioned on the same plane, when the control valve is in butt joint with the valve seat, the sealing elements at two positions are easy to interfere and squeeze, so that leakage occurs at two positions, and further, the gas leakage phenomenon occurs at two adjacent butt joints.

As a preferred embodiment of the present utility model, as shown in fig. 7 to 10, the valve seat 1 is provided with a plurality of sealing grooves 19, at least one butt joint 18 for butt-joint communication with the control valve 2 is provided in the sealing grooves 19, a sealing rib 191 is provided between two adjacent butt joints 18 to divide the sealing grooves 19 into a plurality of sealing cavities 192, and the butt joint 18 is correspondingly provided in the sealing cavities 192.

The sealing rib 191 forms a side seal between two adjacent sealing cavities 192 to seal each of the pair of interfaces 18, and this design improves the likelihood that the two passages of the control valve will not be sealed individually when they are closely spaced, providing an effective isolation seal for each pair of interfaces 18.

Specifically, in one embodiment, as shown in fig. 7 and 8, the control valve 2 is a three-way valve, so the valve seat 1 is provided with three opposite ports 18, wherein two opposite ports 18 are located closer together, and the other opposite port 18 is located farther apart, so the two opposite ports 18 located closer together are provided in the same seal groove 19, and the other opposite port 18 is provided in the other seal groove 19 alone. As shown in fig. 7, a sealing rib 191 is disposed in the sealing groove 19 to separate two interfaces 18 in the same sealing groove 19 from each other, thereby forming two sealing cavities 192, and each sealing cavity 192 has one interface 18 therein.

In another embodiment, as shown in fig. 9, the control valve 2 is a three-way valve, so the valve seat 1 is provided with three opposite ports 18, wherein the three opposite ports 18 are all closely spaced, so the three opposite ports 18 are arranged in one sealing groove 19, and two sealing rib positions 191 are arranged in the sealing groove 19, so that the three opposite ports 18 are separated in three independent sealing cavities 192.

Further, as shown in fig. 3, 8 and 10, a sealing seat 3 is further provided between the valve seat 1 and the control valve 2, the sealing seat 6 has a butt joint 61, and the butt joint portion of the control valve 2 extends into the butt joint 61 to be in butt joint communication with the butt joint 18.

Specifically, as shown in fig. 4, 8 and 10, the butt joint 61 is further provided with an elastic sealing portion extending into the seal groove 19, and the outer wall of the elastic sealing portion is provided with a sealing bead 62.

The sealing ribs 62 are abutted against the groove wall of the sealing groove 19, so that the sealing effect is improved. Preferably, as shown in fig. 4 and 10, a plurality of sealing ribs 62 are provided at intervals along the axial direction of the abutment 61, thereby forming a multi-path seal, and increasing the friction between the abutment 61 and the sealing groove 19, so that the seal seat 6 is firmly fixed to the valve seat 1.

Preferably, as shown in fig. 4, 8 and 10, the depth of each seal cavity 192 is different, and the height of each abutment 61 is set in a one-to-one correspondence with the seal cavity 192.

Each sealing cavity 192 is different in height, the butt joint 61 is designed corresponding to each sealing cavity 192 in height, step sealing is achieved, each sealing step is arranged in a staggered mode, the mutual influence between two adjacent butt joints 61 can be reduced, the risk of extrusion interference of sealing rings of the two butt joints 61 is reduced, and independent sealing of each butt joint 18 is guaranteed.

In a preferred embodiment, as shown in fig. 7 and 9, the sealing bead 191 extends in a curved manner to surround one of the pair of interfaces 18.

The sealing rib 191 surrounds one of the butt joint ports 18 in the sealing groove, so that the wrapping property of the sealing rib 191 on the butt joint structure of the control valve 2 and the valve seat 1 is improved, and a sealing ring is formed on the periphery of the butt joint port 18, so that the sealing effect of each area of a circle in the circumferential direction is improved, and gas leakage at the butt joint port 18 is avoided.

As a preferred embodiment of the present utility model, as shown in fig. 3, 5 and 6, the ventilator valve set further includes a throttle valve 4 disposed in the purge gas path 16, the valve seat 1 is provided with an adjusting groove 17, the throttle valve 4 is disposed in the adjusting groove 17, the throttle valve 4 has a blocking portion 41 extending into the purge gas path 16, and the throttle valve 4 is movable relative to the valve seat 1 to change a blocking area of the blocking portion 41 to the purge gas path 16.

The throttle valve 4 can enable the blocking part 41 to adjust the blocking area of the purging gas circuit 16 through movement, so that the conduction area of the purging gas circuit 16 is changed, different purging gas amounts are obtained, purging of different wind powers with multiple gears is realized, the purging wind power can be adjusted according to pollution conditions in pipelines, and the power consumption of a purging system is saved on the basis of ensuring the purging effect.

It should be noted that the movement mode of the throttle valve 4 is not particularly limited in the present utility model, and may be one of the following embodiments:

example 1: in this embodiment, the throttle valve 4 can move transversely relative to the purge gas path 16, for example, the throttle valve 4 moves along the radial direction of the purge gas path 16, so that the blocking portion 41 blocks at least part of the area of the purge gas path 16, when the throttle valve 4 moves to be coincident with the opening of the purge gas path 16, the purge gas path 16 is completely blocked, when the throttle valve 4 and the opening of the purge gas path 16 are dislocated, the purge gas path 16 is conducted, and different purge wind forces are obtained according to different coincident areas of the throttle valve 4 and the purge gas path 16.

Example 2: in this embodiment, as shown in fig. 6, the throttle valve 4 can move along the axial direction of the purge gas path 16, so that the blocking portion 41 fully extends into the purge gas path 16 and abuts against the opening of the purge gas path 16 to fully block the same, or moves in a direction away from the purge gas path 16, so that the blocking portion 41 is released from the opening of the purge gas path 16, and the purge gas path 16 is conducted. As shown in fig. 6, the blocking portion 41 has a structure in which one end has a large diameter and the other end has a small diameter, and the one end having a small diameter extends into the purge gas path 16. Therefore, when the blocking portion 41 is far away from the opening of the purge gas path 16, the gap between the outer periphery of the blocking portion 41 and the inner wall of the purge gas path 16 is larger and larger, that is, the conduction area of the purge gas path 16 is larger and larger, so that the purge wind power is increased.

Further, as shown in fig. 6, the throttle valve 4 further includes a limiting portion 42, the limiting portion 42 is capable of stopping with the groove wall of the adjustment groove 17 to limit the movement of the throttle valve 4, and a seal 5 is provided between the limiting portion 42 and the groove wall of the adjustment groove 17.

The groove wall stop fit of the limiting part 42 and the regulating groove 17 can limit the movement of the throttle valve 4 towards the purging air passage 16, and a sealing piece 5 is further arranged between the limiting part 42 and the groove wall, and the sealing piece 5 deforms under the extrusion action of the limiting part 42 and the groove wall, so that a gap between the limiting part and the groove wall is blocked, and sealing is realized.

Preferably, as shown in fig. 1 and 2, the air outlet and the purge port 14 are provided on one side of the valve seat 1, and the air inlet 11 is provided on the other side of the valve seat 1.

The air inlet 11 and each air outlet are respectively arranged on two opposite side surfaces of the valve seat 1, so that connection and arrangement of each pipeline outside are facilitated, and pipeline layout is optimized. And the layout setting of each gas path in the valve seat 1 is optimized, and the structure of the internal gas path is simplified.

The utility model can be realized by adopting or referring to the prior art at the places which are not described in the utility model.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims (11)

1. A respirator valve group comprises a valve seat and a control valve which is in butt joint communication with the valve seat, and is characterized in that,

the valve seat is provided with an air inlet, an air outlet, a purging port and a zero calibrating port communicated with the atmosphere, and the air outlet is used for being connected with the pressure sensor;

the valve seat is internally provided with a purging gas circuit, an air outlet gas circuit and a zero calibration gas circuit, the purging gas circuit is communicated with the air inlet and the purging port, the air outlet gas circuit is communicated with the air inlet and the air outlet, the zero calibration gas circuit is communicated with the air outlet and the zero calibration port, and the control valve is used for controlling the on-off of the air outlet gas circuit and the zero calibration gas circuit.

2. The valve manifold of claim 1, wherein the valve manifold is configured to receive a valve,

the air outlet comprises a first air outlet and a second air outlet, the first air outlet is connected with the machine pressure sensor, and the second air outlet is connected with the near-end pressure sensor;

the zero calibration gas circuit comprises a first zero calibration gas circuit communicated with the machine pressure sensor and a second zero calibration gas circuit communicated with the near-end pressure sensor, the control valve comprises a first valve body and a second valve body, the first valve body is used for controlling the on-off of the first zero calibration gas circuit, and the second valve body is used for controlling the on-off of the second zero calibration gas circuit.

3. The valve manifold of claim 1, wherein the valve manifold is configured to receive a valve,

the valve seat is provided with a fixing protrusion which is arranged in a protruding mode, the fixing protrusion encloses a mounting position, and the control valve is fixed at the mounting position.

4. The valve manifold of claim 3, wherein the valve manifold is configured to,

the ventilator valve group further comprises a cover plate, and the cover plate can be fixedly connected with the fixing protrusion so as to press the control valve.

5. The valve manifold of claim 1, wherein the valve manifold is configured to receive a valve,

the valve seat is provided with a plurality of seal grooves, at least one butt joint port used for being in butt joint communication with the control valve is arranged in the seal grooves, sealing rib positions are arranged between two adjacent butt joint ports, so that the seal grooves are divided into a plurality of seal cavities, and the butt joint ports are correspondingly arranged in the seal cavities.

6. The valve manifold of claim 5, wherein the valve manifold is configured to receive the valve manifold,

and a sealing seat is further arranged between the valve seat and the control valve, the sealing seat is provided with a butt joint, and the butt joint part of the control valve stretches into the butt joint to be in butt joint communication with the butt joint.

7. The valve manifold of claim 6, wherein the valve manifold is configured to receive the valve manifold,

the depth of each sealing cavity is different, and the heights of the butt joints are arranged in one-to-one correspondence with the sealing cavities.

8. The valve manifold of claim 6, wherein the valve manifold is configured to receive the valve manifold,

the butt joint is further provided with an elastic sealing part extending into the sealing groove, and the outer wall of the elastic sealing part is provided with a sealing convex rib.

9. The valve manifold of claim 5, wherein the valve manifold is configured to receive the valve manifold,

the sealing rib is bent and extends to encircle one of the butt joints.

10. The valve manifold of claim 1, wherein the valve manifold is configured to receive a valve,

the respirator valve group further comprises a throttle valve arranged in the purging gas path, the valve seat is provided with an adjusting groove, the throttle valve is arranged in the adjusting groove and provided with a plugging part extending into the purging gas path, and the throttle valve can move relative to the valve seat so as to change the plugging area of the plugging part to the purging gas path.

11. The valve manifold of claim 10, wherein the valve manifold is configured to receive the valve manifold,

the throttle valve further comprises a limiting part, the limiting part can be stopped with the groove wall of the adjusting groove to limit the throttle valve to move, and a sealing piece is arranged between the limiting part and the groove wall of the adjusting groove.

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