A combined valve device

Abstract

The present invention discloses a combined valve device, comprising a valve body, a solenoid valve mechanism and a pressure regulating valve mechanism installed on the valve body, the pressure regulating valve mechanism comprising a solenoid valve core and a valve stem assembly slidably connected to the solenoid valve core through an elastic component, the force direction of the elastic component is parallel to the moving direction of the valve stem assembly, and also comprises a diaphragm driving structure linked to the valve stem assembly, when the gas pressure transported by the ventilation pipeline increases, the diaphragm driving structure drives the valve stem assembly to move to reduce the opening of the second valve or temporarily close the second valve, and when the gas pressure decreases, the valve stem assembly is driven again to open the second valve, and the solenoid valve mechanism and the pressure regulating valve mechanism are combined and designed into one body, so that the product volume can be made smaller, so that the valve port opening size can be timely controlled according to the gas pressure to achieve the purpose of automatic pressure regulation, the use is safe and reliable, and the controllability and practicality are good, and the use requirements of users can be better met.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control equipment, and in particular to a combination valve device. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It can make the medium in pipes and equipment flow or stop, and can control its flow. Common valves include stop valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, check valves, etc.

[0003] In daily life and industrial production, most of the valve devices commonly used by people adopt the direct-acting solenoid valve structure, which can be applied to pipeline transportation systems such as steam pipelines, gas pipelines and natural gas pipelines to adjust the direction, flow, speed and other parameters of the medium. This solenoid valve is mainly composed of an electromagnetic coil, a magnetic core and a valve core, and also contains a valve body with one or more holes. When the coil is energized or de-energized, the operation of the magnetic core will cause the fluid to pass through the valve body or be cut off to achieve the purpose of changing the direction of the fluid. However, in actual applications, such a stop valve can generally only realize simple on-off operations, with a single function, and it is impossible to adjust its flow in real time according to the size of the fluid pressure, and the controllability is poor. Once the pipeline transportation pressure is too large, it is easy to burst the pipe, which poses a safety hazard. If other types of valves are added only according to needs, it is necessary to set an intermediate pipeline between the two valves, which makes the pipeline transportation system complex and large in size, and it is difficult to be used in application environments with narrow installation space. In this way, it cannot meet the user's use needs. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the valve device in the prior art can only realize simple on-off operation, has poor controllability, and is prone to pipe bursting once the delivery pressure is too high, which poses a safety hazard. Thus, a combination valve device is provided which can automatically adjust the flow rate according to the gas pressure, has good controllability, is reliable in use and installation, has a compact structure, and can better meet the needs of users.

[0005] In order to solve the above technical problems, the present invention provides a combined valve device, comprising:

[0006] A valve body, wherein a venting pipeline is arranged inside the valve body, and the venting pipeline is provided with two valve ports;

[0007] A solenoid valve mechanism, movably disposed on the valve body for closing or opening the first valve port;

[0008] The pressure regulating valve mechanism includes an electromagnetic valve core which is reciprocatably arranged on the valve body, and a valve stem assembly which is slidably connected to the electromagnetic valve core through an elastic component, wherein the direction of the force of the elastic component is parallel to the moving direction of the valve stem assembly, and the valve stem assembly has a first state in which the second valve port is closed by the electromagnetic valve core when the electromagnetic valve core is close to the second valve port, and a second state in which the second valve port is opened by the elastic component when the electromagnetic valve core is away from the second valve port; and also includes a diaphragm driving structure which is linked to the valve stem assembly, and the diaphragm driving structure is used to drive the valve stem assembly in the second state to reciprocate along the axial direction of the second valve port when the pressure value of the ventilation pipeline reaches a set range.

[0009] As a preferred embodiment, the diaphragm driving structure includes a pressure chamber arranged in the valve body, and a diaphragm that divides the pressure chamber into upper and lower diaphragm chambers, the upper diaphragm chamber is connected to the ventilation line, the valve stem assembly seals and penetrates into the pressure chamber and is connected to the diaphragm, and the diaphragm drives the valve stem assembly to move axially along the second valve port under the action of the pressure difference between the upper diaphragm chamber and the lower diaphragm chamber.

[0010] As a preferred solution, the pressure chamber is arranged below the ventilation pipe through a sealing disk, the sealing disk is provided with a pressure hole connected to the upper membrane chamber, the valve stem assembly is passed through the center position of the diaphragm, and is sealed and connected to the sealing disk through an elastic clip.

[0011] As a preferred solution, a limit pressure plate assembly is tightly clamped on the diaphragm, and the limit pressure plate assembly includes a lower cover plate that is flatly fitted on the lower surface of the diaphragm, and an upper cover plate that is flatly fitted on the upper surface of the diaphragm and tightly covered with the lower cover plate, and the upper cover plate and the lower cover plate are fixedly connected to the valve stem assembly.

[0012] As a preferred solution, a positioning structure is provided between the lower cover plate and the diaphragm, and the positioning structure includes a positioning hole provided on the lower cover plate, and a positioning protrusion provided on the diaphragm and suitable for being embedded in the positioning hole.

[0013] As a preferred solution, a fixed plate is installed in the lower membrane cavity to divide the lower membrane cavity into an upper and lower chamber. The limiting pressure plate assembly is suitable for accommodating the upper chamber. The fixed plate is provided with a flow hole connecting the upper chamber and the lower chamber. A buffer diaphragm and a buffer spring connected to the buffer diaphragm are installed in the lower chamber.

[0014] As a preferred embodiment, the valve stem assembly includes a valve stem movably inserted into the second valve port, and a valve block linked to the valve stem and suitable for covering the second valve port. The lower end of the valve stem passes through the sealing spacer and is connected to the diaphragm, and the upper end of the valve stem is slidably connected to the middle cavity formed by the solenoid valve core.

[0015] As a preferred embodiment, the elastic component includes a slider slidably arranged in the middle cavity, and a spring structure extending into the middle cavity and fixedly connected to the slider, the upper end of the valve stem is fixedly connected to the slider, and the spring structure drives the slider to move away from the valve stem.

[0016] As a preferred embodiment, a limiting structure for limiting the moving distance of the slider is provided between the central cavity and the slider, and the limiting structure includes a first limiting step provided on the inner wall of the central cavity, and a second limiting step corresponding to the slider and cooperating with the first limiting step.

[0017] As a preferred solution, the valve body is provided with a spring adjustment structure for adjusting the pressure of the spring structure, the spring adjustment structure includes a mounting through hole axially arranged opposite to the central cavity, an adjustment rod rotatably arranged on the mounting through hole, and an adjustment block reciprocatingly sleeved on the adjustment rod through a threaded structure, one end of the spring structure penetrates into the mounting through hole and is fixedly connected to the adjustment block, and the other end is fixedly connected to the slider.

[0018] As a preferred solution, one end of the solenoid valve core is fitted and abutted against the upper end of the valve block, a return spring is sleeved on the solenoid valve core, an annular baffle is provided on the side wall of the solenoid valve core close to one end thereof, and both ends of the return spring are respectively abutted against the inner wall of the valve body and the annular baffle.

[0019] As a preferred embodiment, the pressure regulating valve mechanism is arranged close to the inlet end of the ventilation line, and the solenoid valve mechanism is arranged close to the outlet end of the ventilation line; the solenoid valve mechanism includes a driving valve core which can be reciprocated and arranged on the valve body, and a valve assembly which is linked to the driving valve core, and the valve assembly closes or opens the first valve port under the drive of the driving valve core.

[0020] The technical solution of the present invention has the following advantages compared with the prior art:

[0021] 1. The combined valve device provided by the present invention, when powered on, drives the electromagnetic valve mechanism to open the first valve port, and at the same time drives the electromagnetic valve core in the pressure regulating valve mechanism to move away from the second valve port, so that the valve stem assembly slides toward the electromagnetic valve core under the drive of the elastic assembly to open the second valve port. At this time, the ventilation pipeline is fully connected to transport the gas medium. After the valve stem assembly is not restricted by the pressure of the electromagnetic valve core, it can be driven by the diaphragm driving structure to reciprocate along the axial direction of the second valve port, and the flow rate is adjusted by adjusting the opening size of the second valve port. Therefore, when the gas pressure transported by the ventilation pipeline increases to a set range, the diaphragm driving structure Driving the valve stem assembly to move can reduce the opening of the second valve or temporarily close the second valve. When the gas pressure is reduced to a normal range, the valve stem assembly is driven again to open the second valve. By adopting the technical solution, the solenoid valve mechanism and the pressure regulating valve mechanism are combined and designed into one body, the product structure layout is optimized, and the connection structure is simplified, which is conducive to making the product volume smaller. The valve opening size can be controlled in time according to the gas pressure to achieve the purpose of automatic pressure regulation, thereby realizing the pressure stabilization function of the product, thereby preventing the pipeline from bursting due to excessive delivery pressure. It is safer and more reliable to use, with better controllability and practicality, and can better meet the user's usage needs.

[0022] 2. In the combination valve device provided by the present invention, the ventilation pipeline transmits pressure to one side of the upper diaphragm cavity through the pressure hole. When the pressure in the upper diaphragm cavity is greater than that in the lower diaphragm cavity, the diaphragm is driven to drive the valve stem assembly to move downward until the valve stem assembly closes the second valve port. At this time, the valve stem assembly overcomes the elastic pulling force of the elastic component and moves downward, so that the combination valve device temporarily stops conveying gas medium to the outside; and when the pressure in the upper diaphragm cavity is less than that in the lower diaphragm cavity, the elastic component applies an elastic pulling force upward to the valve stem assembly, driving the diaphragm to drive the valve stem assembly to move upward, thereby opening the second valve port for conveying gas medium to the outside. Therefore, the valve stem assembly is driven to move back and forth along the axial direction of the second valve port through the diaphragm driving structure to achieve the regulation of gas flow and pressure.

[0023] 3. The combined valve device provided by the present invention forms a larger pressure-bearing plane area on the diaphragm by respectively arranging an upper cover plate and a lower cover plate on the two side surfaces of the diaphragm in a flat manner, and the upper cover plate can be tightly covered on the upper cover plate. This design increases the pressure-bearing contact surface of the diaphragm, improves the installation stability of the driving diaphragm, and makes the force more uniform and reliable, so as to avoid the displacement and tilting of the driving diaphragm during the pressure movement process, drive the movement of the valve stem assembly to be more stable and reliable, and improve the performance of the product.

[0024] 4. In the combination valve device provided by the present invention, the spring structure extends into the middle cavity to connect to the slider, and the upper end of the valve stem is fixedly connected to the slider. With this structural arrangement, the spring structure applies an elastic pulling force to the valve stem through the slider to move it in the direction close to the solenoid valve core, thereby maintaining a reliable sliding connection between the valve stem assembly and the solenoid valve core. Therefore, while the solenoid valve core moves upward away from the second valve port, the valve stem can move toward the solenoid valve core under the action of the spring structure, thereby normally opening the second valve port.

[0025] 5. In the combination valve device provided by the present invention, an annular stopper is provided on the side wall of the solenoid valve core near one end thereof, and the two ends of the reset spring respectively abut against the inner wall of the valve body and the annular stopper. With this structural arrangement, when the solenoid valve core is energized and moves upward, the reset spring is compressed by the annular stopper. At this time, the pressure of the reset spring does not act on the valve block, thereby ensuring that the valve stem and the valve block can slide upward under the pull of the elastic structure, and when the solenoid valve core loses power and moves downward, it will abut against the upper end of the valve block under the action of the reset spring. During the design, the pressure of the reset spring is greater than the pulling force of the elastic structure, thereby ensuring that the valve block is tightly relative to the second valve port. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art are briefly introduced below.

[0027] Figure 1 A schematic cross-sectional structure diagram of a combined valve device provided by the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the diaphragm drive structure shown;

[0029] Figure 3 It is a schematic diagram of the installation structure of the solenoid valve core and the valve stem assembly of the present invention;

[0030] Figure 4 It is an enlarged structural schematic diagram of the spring adjustment structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the installation structure of the elastic component of the present invention;

[0032] Description of the accompanying drawings: 1-valve body, 11-ventilation pipeline, 12-first valve port, 13-second valve port 2-solenoid valve mechanism, 21-driving valve core, 22-valve assembly, 3-solenoid valve core, 31-middle cavity, 32-reset spring, 33-annular baffle, 34-first limiting step, 4-valve stem assembly, 41-valve stem, 42-valve block, 5-elastic component, 51-spring structure, 52-slider, 53-second limiting step, 6-diaphragm driving structure, 61-upper diaphragm cavity, 62-lower diaphragm cavity, 63-diaphragm, 631-positioning protrusion, 64-elastic clamp, 65-sealing spacer, 66-fixed plate, 661-flow hole, 67-buffer diaphragm, 68-buffer spring, 69-pressure hole, 7-limit pressure plate assembly, 71-lower cover plate, 72-upper cover plate, 73-positioning hole, 8-spring adjustment structure, 81-mounting through hole, 82-adjusting rod, 83-adjusting block, 9-screw adjustment structure. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms “first”, “second” and “third” are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1

[0037] The present embodiment is described in detail below with reference to the accompanying drawings:

[0038] This embodiment provides Figure 1-5 A combined valve device is shown, comprising:

[0039] A valve body 1, in which a vent pipe 11 is provided, and the vent pipe 11 is provided with a first valve port 12 and a second valve port 13;

[0040] A solenoid valve mechanism 2, movably disposed on the valve body 1 for closing or opening the first valve port 12;

[0041] The pressure regulating valve mechanism includes an electromagnetic valve core 3 which is reciprocatably arranged on the valve body 1, and a valve stem assembly 4 which is slidably connected to the electromagnetic valve core 3 through an elastic assembly 5, wherein the direction of the force of the elastic assembly 5 is parallel to the moving direction of the valve stem assembly 4, and the valve stem assembly 4 has a first state in which the second valve port is closed by the electromagnetic valve core when the electromagnetic valve core 3 is close to the second valve port 13, and a second state in which the second valve port is opened by the elastic assembly 5 when the electromagnetic valve core 3 is away from the second valve port 13; and also includes a diaphragm driving structure 6 which is linked to the valve stem assembly 4, and the diaphragm driving structure 6 is used to drive the valve stem assembly 4 in the second state to reciprocate axially along the second valve port 13 when the pressure value of the ventilation pipeline 11 reaches a set range.

[0042] In the above embodiment, when the combined valve device is powered on, the solenoid valve mechanism 2 is driven to open the first valve port 12, and the solenoid valve core 3 in the pressure regulating valve mechanism is driven to move away from the second valve port, so that the valve stem assembly 4 slides toward the solenoid valve core 3 under the drive of the elastic assembly to open the second valve port 13. At this time, the ventilation pipeline 11 is fully connected to transport the gas medium. After the valve stem assembly 4 is not restricted by the pressure of the solenoid valve core 3, it can be driven by the diaphragm driving structure 6 to reciprocate along the axial direction of the second valve port, and the flow rate is adjusted by adjusting the opening size of the second valve port. Therefore, when the gas pressure transported by the ventilation pipeline 11 increases to a set range, the gas medium is transported through the diaphragm driving structure 6. The diaphragm drive structure 6 drives the valve stem assembly 4 to move to reduce the opening of the second valve or temporarily close the second valve 13. When the gas pressure is reduced to a normal range, the valve stem assembly 4 is driven again to open the second valve 13. By adopting the technical solution, the solenoid valve mechanism and the pressure regulating valve mechanism are combined and designed into one body, the product structure layout is optimized, and the connection structure is simplified, which is conducive to making the product volume smaller, and can timely control the valve opening size according to the gas pressure to achieve the purpose of automatic pressure regulation, thereby realizing the pressure stabilization function of the product, thereby preventing the pipeline from bursting due to excessive delivery pressure. It is safer and more reliable to use, with better controllability and practicality, and can better meet the user's usage needs.

[0043] Combine the following Figure 1-2 The specific setting method of the diaphragm drive structure is described in detail:

[0044] The diaphragm driving structure 6 includes a pressure chamber arranged in the valve body 1, and a diaphragm 63 which divides the pressure chamber into an upper diaphragm chamber 61 and a lower diaphragm chamber 62. The upper diaphragm chamber 61 is connected to the ventilation pipeline 11, and the valve stem assembly 4 is sealed and penetrates into the pressure chamber and is connected to the diaphragm 63. The diaphragm 63 drives the valve stem assembly 4 to move axially along the second valve port under the pressure difference between the upper diaphragm chamber 61 and the lower diaphragm chamber 62. With this structural arrangement, the ventilation pipeline 11 and the upper diaphragm chamber 61 can transmit pressure to each other. During the operation of the combined valve device, when the pressure in the upper diaphragm chamber is greater than that in the lower diaphragm chamber, the diaphragm is driven The plate 63 drives the valve stem assembly 4 to move downward until the valve stem assembly closes the second valve port 13. At this time, the valve stem assembly moves downward to overcome the elastic pulling force of the elastic assembly, so that the combined valve device temporarily stops conveying gas medium to the outside; and when the pressure in the upper diaphragm cavity is less than that in the lower diaphragm cavity, the elastic assembly 5 applies an elastic pulling force to the valve stem assembly to move upward, driving the diaphragm 63 to drive the valve stem assembly 4 to move upward, thereby opening the second valve port 13 for conveying gas medium to the outside. Therefore, the diaphragm driving structure 6 drives the valve stem assembly 4 to move back and forth along the axial direction of the second valve port to achieve the regulation of gas flow and pressure.

[0045] As a specific structural setting, such as Figure 2 As shown, the pressure chamber is arranged below the ventilation pipeline 11 through a sealing partition 65. The sealing partition 65 is provided with a pressure hole 69 connected to the upper membrane chamber 61. The pressure can be transmitted to one side of the upper membrane chamber through the pressure hole 69. The valve stem assembly 4 is penetrated at the center position of the diaphragm 63 and is sealed with the sealing partition 65 through an elastic clip 69. The sealing partition 65 is an aluminum partition, and the elastic clip 69 can be a retaining spring structure. When the valve stem assembly 4 is not pressed and closed at the second valve port by the solenoid valve core 3, the valve stem assembly 4 can freely move a certain distance relative to the solenoid valve core 3 in the second state. At this time, the diaphragm 63 can drive the valve stem assembly 4 to move up and down at the second valve port when driven by pressure, thereby closing or opening the second valve port.

[0046] In order to ensure the smooth movement of the diaphragm in the pressure chamber, Figure 2As shown, the diaphragm 63 is tightly clamped with a limit pressure plate assembly 7, and the limit pressure plate assembly 7 includes a lower cover plate 71 which is flatly fitted on the lower surface of the diaphragm 63, and an upper cover plate 72 which is flatly fitted on the upper surface of the diaphragm 63 and tightly covered with the lower cover plate. The upper cover plate 72 and the lower cover plate 71 are fixedly connected to the valve stem assembly 4, and are tightly fixed to the diaphragm 63 by the upper cover plate and the lower cover plate covering each other. This design forms a larger pressure plane area on the diaphragm, thereby increasing the pressure contact surface of the diaphragm 63, improving the installation stability of the diaphragm, and making the force more uniform and reliable, so as to avoid the diaphragm from shifting and tilting during the pressure movement process, drive the movement of the valve stem assembly to be more stable and reliable, and improve the product's performance.

[0047] It is further provided that a positioning structure is provided between the lower cover plate 71 and the diaphragm 63, and the positioning structure includes a positioning hole 73 provided on the lower cover plate 71, and a positioning protrusion 631 provided on the diaphragm 63 and suitable for being embedded in the positioning hole 73. The diaphragm 63 can be quickly positioned and installed on the lower cover plate 71 through the cooperation of the positioning protrusion and the positioning hole, and then the upper cover plate 72 can be covered to complete the installation. The cooperation and fixation are reliable, and the installation is convenient and quick.

[0048] As a preferred embodiment, a fixed plate 66 is installed in the lower membrane cavity 62 for dividing the lower membrane cavity 62 into an upper and lower chamber. The limiting pressure plate assembly 7 is suitable for accommodating the upper chamber. The fixed plate 66 is provided with a flow hole 661 connecting the upper chamber and the lower chamber. A buffer diaphragm 67 and a buffer spring 68 connected to the buffer diaphragm 67 are installed in the lower chamber. With this structural arrangement, when the diaphragm 63 is squeezed and moved into the lower membrane cavity 62, the air pressure in the upper chamber can be introduced into the lower chamber through the flow hole, and the extrusion impact of the diaphragm on the lower membrane cavity can be buffered through the cooperation of the buffer diaphragm and the buffer spring. It is safe and reliable to use and has better stability.

[0049] Combine the following Figure 3-5 The specific arrangement of the valve stem assembly and the elastic assembly is described in detail:

[0050] The valve stem assembly 4 includes a valve stem 41 movably inserted into the second valve port 13, and a valve block 42 linked to the valve stem 41 and suitable for covering the second valve port. The lower end of the valve stem 41 passes through the sealing partition 65 and is connected to the diaphragm 63, and the upper end of the valve stem 41 is slidably connected to the middle cavity 31 formed by the solenoid valve core 3, wherein the elastic assembly 5 includes a slider 52 slidably arranged in the middle cavity 31, and a spring structure 51 extending into the middle cavity 31 and fixedly connected to the slider 52, the upper end of the valve stem 41 is fixedly connected to the slider 52, with this structural arrangement, the spring structure 51 applies an elastic pulling force to the valve stem 41 through the slider to move it in the direction close to the solenoid valve core 3, so that the valve stem assembly 4 maintains a reliable sliding connection with the solenoid valve core. Therefore, when the solenoid valve core 3 While moving upward away from the second valve port 13, the valve stem 41 can move toward the solenoid valve core 3 under the action of the spring structure, thereby opening the second valve port 13; if the pressure in the ventilation pipeline gradually increases, the diaphragm drive structure 6 can drive the valve stem to overcome the elastic force of the spring structure and move downward until the second valve port 13 is closed, so that the combined valve device plays the role of regulating the pressure of the gas medium and ensuring the stability of the pressure of the external delivery pipeline.

[0051] In order to limit the sliding distance of the slider in the middle cavity, Figure 5 As shown, a limiting structure for limiting the sliding distance of the slider 52 is provided between the middle cavity 31 and the slider 52, and the limiting structure includes a first limiting step 34 provided on the inner wall of the middle cavity 31, and a second limiting step 53 correspondingly provided on the slider 52 and cooperating with the first limiting step 34. The first limiting step and the second limiting step are mutually matched to limit the sliding distance of the slider in the middle cavity, so that the valve stem 41 slides an appropriate distance along the middle cavity through the slider to meet the opening height setting of the valve block 42 relative to the second valve port, wherein the upward movement distance of the solenoid valve core 3 is smaller than the sliding distance of the slider in the middle cavity, so that even when the valve stem 41 is driven to move downward by the diaphragm driving structure 6, it will not be separated from the solenoid valve core, the design is reasonable, and the matching connection is reliable.

[0052] In this embodiment, if Figure 4As shown, the valve body 1 is provided with a spring adjustment structure 8 for adjusting the pressure of the spring structure 51, the spring adjustment structure 8 includes a mounting through hole 81 axially opposite to the middle cavity, an adjustment rod 82 rotatably arranged in the mounting through hole, and an adjustment block 83 reciprocatingly sleeved on the adjustment rod 82 through a threaded structure, the threaded structure includes an external thread arranged on the side wall of the adjustment rod, and a threaded hole correspondingly arranged in the adjustment block, one end of the spring structure 51 penetrates the mounting through hole 81 and is fixedly connected to the adjustment block 83, and the other end is fixedly connected to the slider 52. When the pressure adjustment operation of the spring structure is required, the adjustment rod 82 is rotated to make the adjustment block 82 slide up and down along the length direction of the adjustment rod 81 through threaded cooperation, so as to tighten or loosen the spring structure 51 through the adjustment block 82, so that the pressure value of the spring structure acting on the valve stem assembly through the slider can be adjusted, and the adjustment is convenient and fast, and the use is flexible, which can meet the use requirements of different workplaces.

[0053] Combination Figure 3-4 As shown, one end of the solenoid valve core 3 cooperates and abuts against the upper end of the valve block 42, and a reset spring 32 is sleeved on the solenoid valve core 3. An annular stopper 33 is provided on the side wall of the solenoid valve core 3 near one end thereof, and the two ends of the reset spring 32 respectively abut against the inner wall of the valve body and the annular stopper 33. With this structural arrangement, when the solenoid valve core 3 is energized and moves upward, the reset spring is compressed by the annular stopper 33. At this time, the pressure of the reset spring does not act on the valve block 42, thereby ensuring that the valve stem and the valve block can slide upward under the pull of the spring structure 51, and when the solenoid valve core 3 loses power and moves downward, it will abut against the upper end of the valve block 42 under the action of the reset spring 32. During the design, the pressure of the reset spring 32 is greater than the pulling force of the spring structure 51, thereby ensuring that the valve block can tightly close the second valve port.

[0054] Combine the following Figure 1 The specific setting method of the solenoid valve mechanism is described in detail:

[0055] The pressure regulating valve mechanism is arranged near the inlet end of the ventilation pipeline 11, and the solenoid valve mechanism 2 is arranged near the outlet end of the ventilation pipeline 11. A filter layer is arranged at the inlet end. It is further arranged that the solenoid valve mechanism 2 includes a driving valve core 21 which can be reciprocated and arranged on the valve body 1, and a valve assembly 22 which is linked with the driving valve core 21. The valve assembly 22 closes or opens the first valve port 12 under the drive of the driving valve core 21. The valve assembly 22 is also composed of a valve stem and a valve block assembly, wherein the driving valve core and the solenoid valve core are both electromagnetically driven moving iron core structures, and linkage control is achieved through electrical connection to ensure that the driving valve core and the solenoid valve core can be opened and operated synchronously after power is turned on.

[0056] like Figure 1 As shown, the valve body 1 includes two cylindrical shells 14 respectively suitable for accommodating the drive valve core 21 and the electromagnetic valve core 3, and the outer side of the cylindrical shell is provided with an electromagnetic coil structure. The spring adjustment structure 8 is arranged on one of the cylindrical shells, and the other cylindrical shell is provided with a screw adjustment structure 9 for adjusting the moving stroke of the drive valve core 21. The screw adjustment structure 9 includes a threaded through hole arranged in the other cylindrical shell and opposite to the drive valve core up and down, and a screw movably arranged in the threaded through hole. By adjusting the relative distance between the screw and the drive valve core, the opening height of the valve assembly 22 is limited, so that the opening size between the valve assembly and the first valve port can be adjusted.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A combination valve device, characterized in that: include: A valve body (1) having a ventilation pipeline (11) disposed therein, wherein the ventilation pipeline is provided with a first valve port (12) and a second valve port (13); A solenoid valve mechanism (2) movably disposed on the valve body (1) and used for closing or opening the first valve port (12); A pressure regulating valve mechanism, comprising an electromagnetic valve core (3) reciprocatingly arranged on the valve body (1), and a valve stem assembly (4) slidably connected to the electromagnetic valve core (3) via an elastic assembly (5), wherein the direction of the force of the elastic assembly (5) is parallel to the moving direction of the valve stem assembly (4), and the valve stem assembly (4) has a first state in which the electromagnetic valve core (3) is driven by the electromagnetic valve core to close the second valve port (13), and a second state in which the electromagnetic valve core (3) is driven by the elastic assembly (5) to open the second valve port when the electromagnetic valve core (3) is away from the second valve port (13); and also comprises a diaphragm driving structure (6) arranged in linkage with the valve stem assembly (4), wherein the diaphragm driving structure (6) is used to drive the valve stem assembly (4) in the second state to reciprocate axially along the second valve port (13) when the pressure value of the ventilation pipeline (11) reaches a set range; The diaphragm driving structure (6) includes a pressure chamber arranged in the valve body (1), and a diaphragm (63) that divides the pressure chamber into an upper diaphragm chamber (61) and a lower diaphragm chamber (62); the upper diaphragm chamber (61) is connected to the ventilation pipeline (11); the valve stem assembly (4) seals and penetrates into the pressure chamber and is connected to the diaphragm (63); the diaphragm (63) drives the valve stem assembly (4) to move axially along the second valve port under the action of the pressure difference between the upper diaphragm chamber (61) and the lower diaphragm chamber (62); the pressure chamber is arranged below the ventilation pipeline (11) through a sealing partition (65); the sealing partition (65) is provided with a pressure hole (69) that is connected to the upper diaphragm chamber (61); the valve stem assembly (4) is penetrated at the center of the diaphragm (63) and is sealed and connected to the sealing partition (65) through an elastic clamp (64); the elastic clamp is a spring structure.

2. A combination valve device according to claim 1, characterized in that: The diaphragm (63) is tightly clamped with a limit pressure plate assembly (7), and the limit pressure plate assembly (7) includes a lower cover plate (71) which is flatly arranged on the lower surface of the diaphragm (63), and an upper cover plate (72) which is flatly arranged on the upper surface of the diaphragm (63) and is tightly covered with the lower cover plate. The upper cover plate (72) and the lower cover plate (71) are fixedly connected to the valve stem assembly (4).

3. A combination valve device according to claim 2, characterized in that: A positioning structure is provided between the lower cover plate (71) and the diaphragm (63), the positioning structure comprising a positioning hole (73) provided on the lower cover plate (71), and a positioning protrusion (631) provided on the diaphragm (63) and suitable for being embedded in the positioning hole (73).

4. A combination valve device according to claim 3, characterized in that: A fixed plate (66) is installed in the lower membrane cavity (62) to separate the lower membrane cavity (62) into an upper chamber and a lower chamber. The limiting pressure plate assembly is suitable for being accommodated in the upper chamber. The fixed plate (66) is provided with a flow hole (661) connecting the upper chamber and the lower chamber. A buffer diaphragm (67) and a buffer spring (68) connected to the buffer diaphragm (67) are installed in the lower chamber.

5. A combination valve device according to any one of claims 1 to 4, characterized in that: The valve stem assembly (4) includes a valve stem (41) movably inserted into the second valve port (13), and a valve block (42) linked to the valve stem (41) and suitable for covering the second valve port. The lower end of the valve stem (41) passes through the sealing spacer (65) and is connected to the diaphragm (63), and the upper end of the valve stem (41) can be slidably connected to the middle cavity (31) formed by the solenoid valve core (3).

6. A combination valve device according to claim 5, characterized in that: The elastic component (5) comprises a slider (52) slidably arranged in the middle cavity (31), and a spring structure (51) extending into the middle cavity (31) and fixedly connected to the slider (52); the upper end of the valve stem (41) is fixedly connected to the slider (52), and the spring structure (51) drives the slider (52) to move in a direction away from the valve stem.

7. A combination valve device according to claim 6, characterized in that: A limiting structure for limiting the sliding distance of the slider (52) is provided between the central cavity (31) and the slider (52), and the limiting structure comprises a first limiting step (34) provided on the inner wall of the central cavity (31), and a second limiting step (53) corresponding to the slider (52) and cooperating with the first limiting step (34).

8. A combined valve device according to claim 6 or 7, characterized in that: The valve body (1) is provided with a spring adjustment structure (8) for adjusting the pressure of the spring structure (51), the spring adjustment structure (8) comprising a mounting through hole (81) axially arranged opposite to the central cavity, an adjustment rod (82) rotatably arranged in the mounting through hole, and an adjustment block (83) reciprocatingly sleeved on the adjustment rod (82) via a threaded structure, one end of the spring structure (51) penetrates into the mounting through hole (81) and is fixedly connected to the adjustment block (83), and the other end is fixedly connected to the slider (52).

9. A combination valve device according to claim 8, characterized in that: One end of the solenoid valve core (3) is fitted and abutted against the upper end of the valve block (42); a return spring (32) is sleeved on the solenoid valve core (3); an annular stopper (33) is provided on the side wall of the solenoid valve core (3) near one end thereof; and two ends of the return spring (32) are respectively abutted against the inner wall of the valve body and the annular stopper (33).

10. A combined valve device according to claim 9, characterized in that: The pressure regulating valve mechanism is arranged near the inlet end of the ventilation pipeline (11), and the solenoid valve mechanism (2) is arranged near the outlet end of the ventilation pipeline (11); the solenoid valve mechanism (2) comprises a driving valve core (21) which is reciprocally movable on the valve body (1), and a valve assembly (22) which is arranged in linkage with the driving valve core (21); the valve assembly (22) closes or opens the first valve port under the drive of the driving valve core (21).

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